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Commit 306c11b28d7bb85a7adda741798a2b6b60dd305a

Authored by Paolo Bonzini
Committed by Nicholas Bellinger
1 parent d5829eac5f
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

target: go through normal processing for zero-length PSCSI commands 

Right now, commands with a zero-size payload are skipped completely.
This is wrong; such commands should be passed down to the device and
processed normally.

For physical backends, this ignores completely things such as START
STOP UNIT.  For virtual backends, we have a hack in place to clear a
unit attention state on a zero-size REQUEST SENSE, but we still do
not report errors properly on zero-length commands---out-of-bounds
0-block reads and writes, too small parameter list lengths, etc.

This patch fixes this for PSCSI.  Uses of transport_kmap_data_sg are
guarded with a check for non-zero cmd->data_length; for all other
commands a zero length is handled properly in pscsi_execute_cmd.
The sole exception will be for now REPORT LUNS, which is handled
through the normal SPC emulation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

Showing 2 changed files with 7 additions and 5 deletions Inline Diff

drivers/target/target_core_pscsi.c
Diff comments   View file @ 306c11b
1 /******************************************************************************* 1 /*******************************************************************************
2 * Filename: target_core_pscsi.c 2 * Filename: target_core_pscsi.c
3 * 3 *
4 * This file contains the generic target mode <-> Linux SCSI subsystem plugin. 4 * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
5 * 5 *
6 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 6 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
7 * Copyright (c) 2005, 2006, 2007 SBE, Inc. 7 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
8 * Copyright (c) 2007-2010 Rising Tide Systems 8 * Copyright (c) 2007-2010 Rising Tide Systems
9 * Copyright (c) 2008-2010 Linux-iSCSI.org 9 * Copyright (c) 2008-2010 Linux-iSCSI.org
10 * 10 *
11 * Nicholas A. Bellinger <nab@kernel.org> 11 * Nicholas A. Bellinger <nab@kernel.org>
12 * 12 *
13 * This program is free software; you can redistribute it and/or modify 13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by 14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version. 16 * (at your option) any later version.
17 * 17 *
18 * This program is distributed in the hope that it will be useful, 18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details. 21 * GNU General Public License for more details.
22 * 22 *
23 * You should have received a copy of the GNU General Public License 23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 * 26 *
27 ******************************************************************************/ 27 ******************************************************************************/
28 28
29 #include <linux/string.h> 29 #include <linux/string.h>
30 #include <linux/parser.h> 30 #include <linux/parser.h>
31 #include <linux/timer.h> 31 #include <linux/timer.h>
32 #include <linux/blkdev.h> 32 #include <linux/blkdev.h>
33 #include <linux/blk_types.h> 33 #include <linux/blk_types.h>
34 #include <linux/slab.h> 34 #include <linux/slab.h>
35 #include <linux/spinlock.h> 35 #include <linux/spinlock.h>
36 #include <linux/genhd.h> 36 #include <linux/genhd.h>
37 #include <linux/cdrom.h> 37 #include <linux/cdrom.h>
38 #include <linux/ratelimit.h> 38 #include <linux/ratelimit.h>
39 #include <linux/module.h> 39 #include <linux/module.h>
40 #include <asm/unaligned.h> 40 #include <asm/unaligned.h>
41 41
42 #include <scsi/scsi.h> 42 #include <scsi/scsi.h>
43 #include <scsi/scsi_device.h> 43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_cmnd.h> 44 #include <scsi/scsi_cmnd.h>
45 #include <scsi/scsi_host.h> 45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_tcq.h> 46 #include <scsi/scsi_tcq.h>
47 47
48 #include <target/target_core_base.h> 48 #include <target/target_core_base.h>
49 #include <target/target_core_backend.h> 49 #include <target/target_core_backend.h>
50 50
51 #include "target_core_alua.h" 51 #include "target_core_alua.h"
52 #include "target_core_pscsi.h" 52 #include "target_core_pscsi.h"
53 53
54 #define ISPRINT(a) ((a >= ' ') && (a <= '~')) 54 #define ISPRINT(a) ((a >= ' ') && (a <= '~'))
55 55
56 static struct se_subsystem_api pscsi_template; 56 static struct se_subsystem_api pscsi_template;
57 57
58 static int pscsi_execute_cmd(struct se_cmd *cmd); 58 static int pscsi_execute_cmd(struct se_cmd *cmd);
59 static void pscsi_req_done(struct request *, int); 59 static void pscsi_req_done(struct request *, int);
60 60
61 /* pscsi_attach_hba(): 61 /* pscsi_attach_hba():
62 * 62 *
63 * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. 63 * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
64 * from the passed SCSI Host ID. 64 * from the passed SCSI Host ID.
65 */ 65 */
66 static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) 66 static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
67 { 67 {
68 struct pscsi_hba_virt *phv; 68 struct pscsi_hba_virt *phv;
69 69
70 phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); 70 phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL);
71 if (!phv) { 71 if (!phv) {
72 pr_err("Unable to allocate struct pscsi_hba_virt\n"); 72 pr_err("Unable to allocate struct pscsi_hba_virt\n");
73 return -ENOMEM; 73 return -ENOMEM;
74 } 74 }
75 phv->phv_host_id = host_id; 75 phv->phv_host_id = host_id;
76 phv->phv_mode = PHV_VIRTUAL_HOST_ID; 76 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
77 77
78 hba->hba_ptr = phv; 78 hba->hba_ptr = phv;
79 79
80 pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" 80 pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
81 " Generic Target Core Stack %s\n", hba->hba_id, 81 " Generic Target Core Stack %s\n", hba->hba_id,
82 PSCSI_VERSION, TARGET_CORE_MOD_VERSION); 82 PSCSI_VERSION, TARGET_CORE_MOD_VERSION);
83 pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", 83 pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
84 hba->hba_id); 84 hba->hba_id);
85 85
86 return 0; 86 return 0;
87 } 87 }
88 88
89 static void pscsi_detach_hba(struct se_hba *hba) 89 static void pscsi_detach_hba(struct se_hba *hba)
90 { 90 {
91 struct pscsi_hba_virt *phv = hba->hba_ptr; 91 struct pscsi_hba_virt *phv = hba->hba_ptr;
92 struct Scsi_Host *scsi_host = phv->phv_lld_host; 92 struct Scsi_Host *scsi_host = phv->phv_lld_host;
93 93
94 if (scsi_host) { 94 if (scsi_host) {
95 scsi_host_put(scsi_host); 95 scsi_host_put(scsi_host);
96 96
97 pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" 97 pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from"
98 " Generic Target Core\n", hba->hba_id, 98 " Generic Target Core\n", hba->hba_id,
99 (scsi_host->hostt->name) ? (scsi_host->hostt->name) : 99 (scsi_host->hostt->name) ? (scsi_host->hostt->name) :
100 "Unknown"); 100 "Unknown");
101 } else 101 } else
102 pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" 102 pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA"
103 " from Generic Target Core\n", hba->hba_id); 103 " from Generic Target Core\n", hba->hba_id);
104 104
105 kfree(phv); 105 kfree(phv);
106 hba->hba_ptr = NULL; 106 hba->hba_ptr = NULL;
107 } 107 }
108 108
109 static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) 109 static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag)
110 { 110 {
111 struct pscsi_hba_virt *phv = hba->hba_ptr; 111 struct pscsi_hba_virt *phv = hba->hba_ptr;
112 struct Scsi_Host *sh = phv->phv_lld_host; 112 struct Scsi_Host *sh = phv->phv_lld_host;
113 /* 113 /*
114 * Release the struct Scsi_Host 114 * Release the struct Scsi_Host
115 */ 115 */
116 if (!mode_flag) { 116 if (!mode_flag) {
117 if (!sh) 117 if (!sh)
118 return 0; 118 return 0;
119 119
120 phv->phv_lld_host = NULL; 120 phv->phv_lld_host = NULL;
121 phv->phv_mode = PHV_VIRTUAL_HOST_ID; 121 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
122 122
123 pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" 123 pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
124 " %s\n", hba->hba_id, (sh->hostt->name) ? 124 " %s\n", hba->hba_id, (sh->hostt->name) ?
125 (sh->hostt->name) : "Unknown"); 125 (sh->hostt->name) : "Unknown");
126 126
127 scsi_host_put(sh); 127 scsi_host_put(sh);
128 return 0; 128 return 0;
129 } 129 }
130 /* 130 /*
131 * Otherwise, locate struct Scsi_Host from the original passed 131 * Otherwise, locate struct Scsi_Host from the original passed
132 * pSCSI Host ID and enable for phba mode 132 * pSCSI Host ID and enable for phba mode
133 */ 133 */
134 sh = scsi_host_lookup(phv->phv_host_id); 134 sh = scsi_host_lookup(phv->phv_host_id);
135 if (IS_ERR(sh)) { 135 if (IS_ERR(sh)) {
136 pr_err("pSCSI: Unable to locate SCSI Host for" 136 pr_err("pSCSI: Unable to locate SCSI Host for"
137 " phv_host_id: %d\n", phv->phv_host_id); 137 " phv_host_id: %d\n", phv->phv_host_id);
138 return PTR_ERR(sh); 138 return PTR_ERR(sh);
139 } 139 }
140 140
141 phv->phv_lld_host = sh; 141 phv->phv_lld_host = sh;
142 phv->phv_mode = PHV_LLD_SCSI_HOST_NO; 142 phv->phv_mode = PHV_LLD_SCSI_HOST_NO;
143 143
144 pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", 144 pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
145 hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); 145 hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown");
146 146
147 return 1; 147 return 1;
148 } 148 }
149 149
150 static void pscsi_tape_read_blocksize(struct se_device *dev, 150 static void pscsi_tape_read_blocksize(struct se_device *dev,
151 struct scsi_device *sdev) 151 struct scsi_device *sdev)
152 { 152 {
153 unsigned char cdb[MAX_COMMAND_SIZE], *buf; 153 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
154 int ret; 154 int ret;
155 155
156 buf = kzalloc(12, GFP_KERNEL); 156 buf = kzalloc(12, GFP_KERNEL);
157 if (!buf) 157 if (!buf)
158 return; 158 return;
159 159
160 memset(cdb, 0, MAX_COMMAND_SIZE); 160 memset(cdb, 0, MAX_COMMAND_SIZE);
161 cdb[0] = MODE_SENSE; 161 cdb[0] = MODE_SENSE;
162 cdb[4] = 0x0c; /* 12 bytes */ 162 cdb[4] = 0x0c; /* 12 bytes */
163 163
164 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, 164 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL,
165 HZ, 1, NULL); 165 HZ, 1, NULL);
166 if (ret) 166 if (ret)
167 goto out_free; 167 goto out_free;
168 168
169 /* 169 /*
170 * If MODE_SENSE still returns zero, set the default value to 1024. 170 * If MODE_SENSE still returns zero, set the default value to 1024.
171 */ 171 */
172 sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); 172 sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]);
173 if (!sdev->sector_size) 173 if (!sdev->sector_size)
174 sdev->sector_size = 1024; 174 sdev->sector_size = 1024;
175 out_free: 175 out_free:
176 kfree(buf); 176 kfree(buf);
177 } 177 }
178 178
179 static void 179 static void
180 pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) 180 pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn)
181 { 181 {
182 unsigned char *buf; 182 unsigned char *buf;
183 183
184 if (sdev->inquiry_len < INQUIRY_LEN) 184 if (sdev->inquiry_len < INQUIRY_LEN)
185 return; 185 return;
186 186
187 buf = sdev->inquiry; 187 buf = sdev->inquiry;
188 if (!buf) 188 if (!buf)
189 return; 189 return;
190 /* 190 /*
191 * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() 191 * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev()
192 */ 192 */
193 memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); 193 memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor));
194 memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); 194 memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model));
195 memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); 195 memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision));
196 } 196 }
197 197
198 static int 198 static int
199 pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) 199 pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
200 { 200 {
201 unsigned char cdb[MAX_COMMAND_SIZE], *buf; 201 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
202 int ret; 202 int ret;
203 203
204 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 204 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
205 if (!buf) 205 if (!buf)
206 return -ENOMEM; 206 return -ENOMEM;
207 207
208 memset(cdb, 0, MAX_COMMAND_SIZE); 208 memset(cdb, 0, MAX_COMMAND_SIZE);
209 cdb[0] = INQUIRY; 209 cdb[0] = INQUIRY;
210 cdb[1] = 0x01; /* Query VPD */ 210 cdb[1] = 0x01; /* Query VPD */
211 cdb[2] = 0x80; /* Unit Serial Number */ 211 cdb[2] = 0x80; /* Unit Serial Number */
212 cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; 212 cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff;
213 cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); 213 cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff);
214 214
215 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 215 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
216 INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); 216 INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL);
217 if (ret) 217 if (ret)
218 goto out_free; 218 goto out_free;
219 219
220 snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); 220 snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
221 221
222 wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; 222 wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL;
223 223
224 kfree(buf); 224 kfree(buf);
225 return 0; 225 return 0;
226 226
227 out_free: 227 out_free:
228 kfree(buf); 228 kfree(buf);
229 return -EPERM; 229 return -EPERM;
230 } 230 }
231 231
232 static void 232 static void
233 pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, 233 pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
234 struct t10_wwn *wwn) 234 struct t10_wwn *wwn)
235 { 235 {
236 unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; 236 unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83;
237 int ident_len, page_len, off = 4, ret; 237 int ident_len, page_len, off = 4, ret;
238 struct t10_vpd *vpd; 238 struct t10_vpd *vpd;
239 239
240 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); 240 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
241 if (!buf) 241 if (!buf)
242 return; 242 return;
243 243
244 memset(cdb, 0, MAX_COMMAND_SIZE); 244 memset(cdb, 0, MAX_COMMAND_SIZE);
245 cdb[0] = INQUIRY; 245 cdb[0] = INQUIRY;
246 cdb[1] = 0x01; /* Query VPD */ 246 cdb[1] = 0x01; /* Query VPD */
247 cdb[2] = 0x83; /* Device Identifier */ 247 cdb[2] = 0x83; /* Device Identifier */
248 cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; 248 cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff;
249 cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); 249 cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff);
250 250
251 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 251 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
252 INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, 252 INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
253 NULL, HZ, 1, NULL); 253 NULL, HZ, 1, NULL);
254 if (ret) 254 if (ret)
255 goto out; 255 goto out;
256 256
257 page_len = (buf[2] << 8) | buf[3]; 257 page_len = (buf[2] << 8) | buf[3];
258 while (page_len > 0) { 258 while (page_len > 0) {
259 /* Grab a pointer to the Identification descriptor */ 259 /* Grab a pointer to the Identification descriptor */
260 page_83 = &buf[off]; 260 page_83 = &buf[off];
261 ident_len = page_83[3]; 261 ident_len = page_83[3];
262 if (!ident_len) { 262 if (!ident_len) {
263 pr_err("page_83[3]: identifier" 263 pr_err("page_83[3]: identifier"
264 " length zero!\n"); 264 " length zero!\n");
265 break; 265 break;
266 } 266 }
267 pr_debug("T10 VPD Identifer Length: %d\n", ident_len); 267 pr_debug("T10 VPD Identifer Length: %d\n", ident_len);
268 268
269 vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); 269 vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL);
270 if (!vpd) { 270 if (!vpd) {
271 pr_err("Unable to allocate memory for" 271 pr_err("Unable to allocate memory for"
272 " struct t10_vpd\n"); 272 " struct t10_vpd\n");
273 goto out; 273 goto out;
274 } 274 }
275 INIT_LIST_HEAD(&vpd->vpd_list); 275 INIT_LIST_HEAD(&vpd->vpd_list);
276 276
277 transport_set_vpd_proto_id(vpd, page_83); 277 transport_set_vpd_proto_id(vpd, page_83);
278 transport_set_vpd_assoc(vpd, page_83); 278 transport_set_vpd_assoc(vpd, page_83);
279 279
280 if (transport_set_vpd_ident_type(vpd, page_83) < 0) { 280 if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
281 off += (ident_len + 4); 281 off += (ident_len + 4);
282 page_len -= (ident_len + 4); 282 page_len -= (ident_len + 4);
283 kfree(vpd); 283 kfree(vpd);
284 continue; 284 continue;
285 } 285 }
286 if (transport_set_vpd_ident(vpd, page_83) < 0) { 286 if (transport_set_vpd_ident(vpd, page_83) < 0) {
287 off += (ident_len + 4); 287 off += (ident_len + 4);
288 page_len -= (ident_len + 4); 288 page_len -= (ident_len + 4);
289 kfree(vpd); 289 kfree(vpd);
290 continue; 290 continue;
291 } 291 }
292 292
293 list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); 293 list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
294 off += (ident_len + 4); 294 off += (ident_len + 4);
295 page_len -= (ident_len + 4); 295 page_len -= (ident_len + 4);
296 } 296 }
297 297
298 out: 298 out:
299 kfree(buf); 299 kfree(buf);
300 } 300 }
301 301
302 /* pscsi_add_device_to_list(): 302 /* pscsi_add_device_to_list():
303 * 303 *
304 * 304 *
305 */ 305 */
306 static struct se_device *pscsi_add_device_to_list( 306 static struct se_device *pscsi_add_device_to_list(
307 struct se_hba *hba, 307 struct se_hba *hba,
308 struct se_subsystem_dev *se_dev, 308 struct se_subsystem_dev *se_dev,
309 struct pscsi_dev_virt *pdv, 309 struct pscsi_dev_virt *pdv,
310 struct scsi_device *sd, 310 struct scsi_device *sd,
311 int dev_flags) 311 int dev_flags)
312 { 312 {
313 struct se_device *dev; 313 struct se_device *dev;
314 struct se_dev_limits dev_limits; 314 struct se_dev_limits dev_limits;
315 struct request_queue *q; 315 struct request_queue *q;
316 struct queue_limits *limits; 316 struct queue_limits *limits;
317 317
318 memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 318 memset(&dev_limits, 0, sizeof(struct se_dev_limits));
319 319
320 if (!sd->queue_depth) { 320 if (!sd->queue_depth) {
321 sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; 321 sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
322 322
323 pr_err("Set broken SCSI Device %d:%d:%d" 323 pr_err("Set broken SCSI Device %d:%d:%d"
324 " queue_depth to %d\n", sd->channel, sd->id, 324 " queue_depth to %d\n", sd->channel, sd->id,
325 sd->lun, sd->queue_depth); 325 sd->lun, sd->queue_depth);
326 } 326 }
327 /* 327 /*
328 * Setup the local scope queue_limits from struct request_queue->limits 328 * Setup the local scope queue_limits from struct request_queue->limits
329 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 329 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
330 */ 330 */
331 q = sd->request_queue; 331 q = sd->request_queue;
332 limits = &dev_limits.limits; 332 limits = &dev_limits.limits;
333 limits->logical_block_size = sd->sector_size; 333 limits->logical_block_size = sd->sector_size;
334 limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); 334 limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q));
335 limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); 335 limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q));
336 dev_limits.hw_queue_depth = sd->queue_depth; 336 dev_limits.hw_queue_depth = sd->queue_depth;
337 dev_limits.queue_depth = sd->queue_depth; 337 dev_limits.queue_depth = sd->queue_depth;
338 /* 338 /*
339 * Setup our standard INQUIRY info into se_dev->t10_wwn 339 * Setup our standard INQUIRY info into se_dev->t10_wwn
340 */ 340 */
341 pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); 341 pscsi_set_inquiry_info(sd, &se_dev->t10_wwn);
342 342
343 /* 343 /*
344 * Set the pointer pdv->pdv_sd to from passed struct scsi_device, 344 * Set the pointer pdv->pdv_sd to from passed struct scsi_device,
345 * which has already been referenced with Linux SCSI code with 345 * which has already been referenced with Linux SCSI code with
346 * scsi_device_get() in this file's pscsi_create_virtdevice(). 346 * scsi_device_get() in this file's pscsi_create_virtdevice().
347 * 347 *
348 * The passthrough operations called by the transport_add_device_* 348 * The passthrough operations called by the transport_add_device_*
349 * function below will require this pointer to be set for passthroug 349 * function below will require this pointer to be set for passthroug
350 * ops. 350 * ops.
351 * 351 *
352 * For the shutdown case in pscsi_free_device(), this struct 352 * For the shutdown case in pscsi_free_device(), this struct
353 * scsi_device reference is released with Linux SCSI code 353 * scsi_device reference is released with Linux SCSI code
354 * scsi_device_put() and the pdv->pdv_sd cleared. 354 * scsi_device_put() and the pdv->pdv_sd cleared.
355 */ 355 */
356 pdv->pdv_sd = sd; 356 pdv->pdv_sd = sd;
357 dev = transport_add_device_to_core_hba(hba, &pscsi_template, 357 dev = transport_add_device_to_core_hba(hba, &pscsi_template,
358 se_dev, dev_flags, pdv, 358 se_dev, dev_flags, pdv,
359 &dev_limits, NULL, NULL); 359 &dev_limits, NULL, NULL);
360 if (!dev) { 360 if (!dev) {
361 pdv->pdv_sd = NULL; 361 pdv->pdv_sd = NULL;
362 return NULL; 362 return NULL;
363 } 363 }
364 364
365 /* 365 /*
366 * Locate VPD WWN Information used for various purposes within 366 * Locate VPD WWN Information used for various purposes within
367 * the Storage Engine. 367 * the Storage Engine.
368 */ 368 */
369 if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { 369 if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) {
370 /* 370 /*
371 * If VPD Unit Serial returned GOOD status, try 371 * If VPD Unit Serial returned GOOD status, try
372 * VPD Device Identification page (0x83). 372 * VPD Device Identification page (0x83).
373 */ 373 */
374 pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); 374 pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn);
375 } 375 }
376 376
377 /* 377 /*
378 * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. 378 * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
379 */ 379 */
380 if (sd->type == TYPE_TAPE) 380 if (sd->type == TYPE_TAPE)
381 pscsi_tape_read_blocksize(dev, sd); 381 pscsi_tape_read_blocksize(dev, sd);
382 return dev; 382 return dev;
383 } 383 }
384 384
385 static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) 385 static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
386 { 386 {
387 struct pscsi_dev_virt *pdv; 387 struct pscsi_dev_virt *pdv;
388 388
389 pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); 389 pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL);
390 if (!pdv) { 390 if (!pdv) {
391 pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); 391 pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
392 return NULL; 392 return NULL;
393 } 393 }
394 pdv->pdv_se_hba = hba; 394 pdv->pdv_se_hba = hba;
395 395
396 pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); 396 pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name);
397 return pdv; 397 return pdv;
398 } 398 }
399 399
400 /* 400 /*
401 * Called with struct Scsi_Host->host_lock called. 401 * Called with struct Scsi_Host->host_lock called.
402 */ 402 */
403 static struct se_device *pscsi_create_type_disk( 403 static struct se_device *pscsi_create_type_disk(
404 struct scsi_device *sd, 404 struct scsi_device *sd,
405 struct pscsi_dev_virt *pdv, 405 struct pscsi_dev_virt *pdv,
406 struct se_subsystem_dev *se_dev, 406 struct se_subsystem_dev *se_dev,
407 struct se_hba *hba) 407 struct se_hba *hba)
408 __releases(sh->host_lock) 408 __releases(sh->host_lock)
409 { 409 {
410 struct se_device *dev; 410 struct se_device *dev;
411 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 411 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
412 struct Scsi_Host *sh = sd->host; 412 struct Scsi_Host *sh = sd->host;
413 struct block_device *bd; 413 struct block_device *bd;
414 u32 dev_flags = 0; 414 u32 dev_flags = 0;
415 415
416 if (scsi_device_get(sd)) { 416 if (scsi_device_get(sd)) {
417 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 417 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
418 sh->host_no, sd->channel, sd->id, sd->lun); 418 sh->host_no, sd->channel, sd->id, sd->lun);
419 spin_unlock_irq(sh->host_lock); 419 spin_unlock_irq(sh->host_lock);
420 return NULL; 420 return NULL;
421 } 421 }
422 spin_unlock_irq(sh->host_lock); 422 spin_unlock_irq(sh->host_lock);
423 /* 423 /*
424 * Claim exclusive struct block_device access to struct scsi_device 424 * Claim exclusive struct block_device access to struct scsi_device
425 * for TYPE_DISK using supplied udev_path 425 * for TYPE_DISK using supplied udev_path
426 */ 426 */
427 bd = blkdev_get_by_path(se_dev->se_dev_udev_path, 427 bd = blkdev_get_by_path(se_dev->se_dev_udev_path,
428 FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); 428 FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv);
429 if (IS_ERR(bd)) { 429 if (IS_ERR(bd)) {
430 pr_err("pSCSI: blkdev_get_by_path() failed\n"); 430 pr_err("pSCSI: blkdev_get_by_path() failed\n");
431 scsi_device_put(sd); 431 scsi_device_put(sd);
432 return NULL; 432 return NULL;
433 } 433 }
434 pdv->pdv_bd = bd; 434 pdv->pdv_bd = bd;
435 435
436 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 436 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
437 if (!dev) { 437 if (!dev) {
438 blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 438 blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
439 scsi_device_put(sd); 439 scsi_device_put(sd);
440 return NULL; 440 return NULL;
441 } 441 }
442 pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", 442 pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n",
443 phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); 443 phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
444 444
445 return dev; 445 return dev;
446 } 446 }
447 447
448 /* 448 /*
449 * Called with struct Scsi_Host->host_lock called. 449 * Called with struct Scsi_Host->host_lock called.
450 */ 450 */
451 static struct se_device *pscsi_create_type_rom( 451 static struct se_device *pscsi_create_type_rom(
452 struct scsi_device *sd, 452 struct scsi_device *sd,
453 struct pscsi_dev_virt *pdv, 453 struct pscsi_dev_virt *pdv,
454 struct se_subsystem_dev *se_dev, 454 struct se_subsystem_dev *se_dev,
455 struct se_hba *hba) 455 struct se_hba *hba)
456 __releases(sh->host_lock) 456 __releases(sh->host_lock)
457 { 457 {
458 struct se_device *dev; 458 struct se_device *dev;
459 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 459 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
460 struct Scsi_Host *sh = sd->host; 460 struct Scsi_Host *sh = sd->host;
461 u32 dev_flags = 0; 461 u32 dev_flags = 0;
462 462
463 if (scsi_device_get(sd)) { 463 if (scsi_device_get(sd)) {
464 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", 464 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
465 sh->host_no, sd->channel, sd->id, sd->lun); 465 sh->host_no, sd->channel, sd->id, sd->lun);
466 spin_unlock_irq(sh->host_lock); 466 spin_unlock_irq(sh->host_lock);
467 return NULL; 467 return NULL;
468 } 468 }
469 spin_unlock_irq(sh->host_lock); 469 spin_unlock_irq(sh->host_lock);
470 470
471 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 471 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
472 if (!dev) { 472 if (!dev) {
473 scsi_device_put(sd); 473 scsi_device_put(sd);
474 return NULL; 474 return NULL;
475 } 475 }
476 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 476 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
477 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 477 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
478 sd->channel, sd->id, sd->lun); 478 sd->channel, sd->id, sd->lun);
479 479
480 return dev; 480 return dev;
481 } 481 }
482 482
483 /* 483 /*
484 *Called with struct Scsi_Host->host_lock called. 484 *Called with struct Scsi_Host->host_lock called.
485 */ 485 */
486 static struct se_device *pscsi_create_type_other( 486 static struct se_device *pscsi_create_type_other(
487 struct scsi_device *sd, 487 struct scsi_device *sd,
488 struct pscsi_dev_virt *pdv, 488 struct pscsi_dev_virt *pdv,
489 struct se_subsystem_dev *se_dev, 489 struct se_subsystem_dev *se_dev,
490 struct se_hba *hba) 490 struct se_hba *hba)
491 __releases(sh->host_lock) 491 __releases(sh->host_lock)
492 { 492 {
493 struct se_device *dev; 493 struct se_device *dev;
494 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 494 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
495 struct Scsi_Host *sh = sd->host; 495 struct Scsi_Host *sh = sd->host;
496 u32 dev_flags = 0; 496 u32 dev_flags = 0;
497 497
498 spin_unlock_irq(sh->host_lock); 498 spin_unlock_irq(sh->host_lock);
499 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); 499 dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
500 if (!dev) 500 if (!dev)
501 return NULL; 501 return NULL;
502 502
503 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", 503 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
504 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, 504 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
505 sd->channel, sd->id, sd->lun); 505 sd->channel, sd->id, sd->lun);
506 506
507 return dev; 507 return dev;
508 } 508 }
509 509
510 static struct se_device *pscsi_create_virtdevice( 510 static struct se_device *pscsi_create_virtdevice(
511 struct se_hba *hba, 511 struct se_hba *hba,
512 struct se_subsystem_dev *se_dev, 512 struct se_subsystem_dev *se_dev,
513 void *p) 513 void *p)
514 { 514 {
515 struct pscsi_dev_virt *pdv = p; 515 struct pscsi_dev_virt *pdv = p;
516 struct se_device *dev; 516 struct se_device *dev;
517 struct scsi_device *sd; 517 struct scsi_device *sd;
518 struct pscsi_hba_virt *phv = hba->hba_ptr; 518 struct pscsi_hba_virt *phv = hba->hba_ptr;
519 struct Scsi_Host *sh = phv->phv_lld_host; 519 struct Scsi_Host *sh = phv->phv_lld_host;
520 int legacy_mode_enable = 0; 520 int legacy_mode_enable = 0;
521 521
522 if (!pdv) { 522 if (!pdv) {
523 pr_err("Unable to locate struct pscsi_dev_virt" 523 pr_err("Unable to locate struct pscsi_dev_virt"
524 " parameter\n"); 524 " parameter\n");
525 return ERR_PTR(-EINVAL); 525 return ERR_PTR(-EINVAL);
526 } 526 }
527 /* 527 /*
528 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the 528 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
529 * struct Scsi_Host we will need to bring the TCM/pSCSI object online 529 * struct Scsi_Host we will need to bring the TCM/pSCSI object online
530 */ 530 */
531 if (!sh) { 531 if (!sh) {
532 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 532 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
533 pr_err("pSCSI: Unable to locate struct" 533 pr_err("pSCSI: Unable to locate struct"
534 " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); 534 " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
535 return ERR_PTR(-ENODEV); 535 return ERR_PTR(-ENODEV);
536 } 536 }
537 /* 537 /*
538 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device 538 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
539 * reference, we enforce that udev_path has been set 539 * reference, we enforce that udev_path has been set
540 */ 540 */
541 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { 541 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) {
542 pr_err("pSCSI: udev_path attribute has not" 542 pr_err("pSCSI: udev_path attribute has not"
543 " been set before ENABLE=1\n"); 543 " been set before ENABLE=1\n");
544 return ERR_PTR(-EINVAL); 544 return ERR_PTR(-EINVAL);
545 } 545 }
546 /* 546 /*
547 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, 547 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
548 * use the original TCM hba ID to reference Linux/SCSI Host No 548 * use the original TCM hba ID to reference Linux/SCSI Host No
549 * and enable for PHV_LLD_SCSI_HOST_NO mode. 549 * and enable for PHV_LLD_SCSI_HOST_NO mode.
550 */ 550 */
551 if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { 551 if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
552 spin_lock(&hba->device_lock); 552 spin_lock(&hba->device_lock);
553 if (!list_empty(&hba->hba_dev_list)) { 553 if (!list_empty(&hba->hba_dev_list)) {
554 pr_err("pSCSI: Unable to set hba_mode" 554 pr_err("pSCSI: Unable to set hba_mode"
555 " with active devices\n"); 555 " with active devices\n");
556 spin_unlock(&hba->device_lock); 556 spin_unlock(&hba->device_lock);
557 return ERR_PTR(-EEXIST); 557 return ERR_PTR(-EEXIST);
558 } 558 }
559 spin_unlock(&hba->device_lock); 559 spin_unlock(&hba->device_lock);
560 560
561 if (pscsi_pmode_enable_hba(hba, 1) != 1) 561 if (pscsi_pmode_enable_hba(hba, 1) != 1)
562 return ERR_PTR(-ENODEV); 562 return ERR_PTR(-ENODEV);
563 563
564 legacy_mode_enable = 1; 564 legacy_mode_enable = 1;
565 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 565 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
566 sh = phv->phv_lld_host; 566 sh = phv->phv_lld_host;
567 } else { 567 } else {
568 sh = scsi_host_lookup(pdv->pdv_host_id); 568 sh = scsi_host_lookup(pdv->pdv_host_id);
569 if (IS_ERR(sh)) { 569 if (IS_ERR(sh)) {
570 pr_err("pSCSI: Unable to locate" 570 pr_err("pSCSI: Unable to locate"
571 " pdv_host_id: %d\n", pdv->pdv_host_id); 571 " pdv_host_id: %d\n", pdv->pdv_host_id);
572 return ERR_CAST(sh); 572 return ERR_CAST(sh);
573 } 573 }
574 } 574 }
575 } else { 575 } else {
576 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { 576 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
577 pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" 577 pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
578 " struct Scsi_Host exists\n"); 578 " struct Scsi_Host exists\n");
579 return ERR_PTR(-EEXIST); 579 return ERR_PTR(-EEXIST);
580 } 580 }
581 } 581 }
582 582
583 spin_lock_irq(sh->host_lock); 583 spin_lock_irq(sh->host_lock);
584 list_for_each_entry(sd, &sh->__devices, siblings) { 584 list_for_each_entry(sd, &sh->__devices, siblings) {
585 if ((pdv->pdv_channel_id != sd->channel) || 585 if ((pdv->pdv_channel_id != sd->channel) ||
586 (pdv->pdv_target_id != sd->id) || 586 (pdv->pdv_target_id != sd->id) ||
587 (pdv->pdv_lun_id != sd->lun)) 587 (pdv->pdv_lun_id != sd->lun))
588 continue; 588 continue;
589 /* 589 /*
590 * Functions will release the held struct scsi_host->host_lock 590 * Functions will release the held struct scsi_host->host_lock
591 * before calling calling pscsi_add_device_to_list() to register 591 * before calling calling pscsi_add_device_to_list() to register
592 * struct scsi_device with target_core_mod. 592 * struct scsi_device with target_core_mod.
593 */ 593 */
594 switch (sd->type) { 594 switch (sd->type) {
595 case TYPE_DISK: 595 case TYPE_DISK:
596 dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); 596 dev = pscsi_create_type_disk(sd, pdv, se_dev, hba);
597 break; 597 break;
598 case TYPE_ROM: 598 case TYPE_ROM:
599 dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); 599 dev = pscsi_create_type_rom(sd, pdv, se_dev, hba);
600 break; 600 break;
601 default: 601 default:
602 dev = pscsi_create_type_other(sd, pdv, se_dev, hba); 602 dev = pscsi_create_type_other(sd, pdv, se_dev, hba);
603 break; 603 break;
604 } 604 }
605 605
606 if (!dev) { 606 if (!dev) {
607 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 607 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
608 scsi_host_put(sh); 608 scsi_host_put(sh);
609 else if (legacy_mode_enable) { 609 else if (legacy_mode_enable) {
610 pscsi_pmode_enable_hba(hba, 0); 610 pscsi_pmode_enable_hba(hba, 0);
611 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 611 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
612 } 612 }
613 pdv->pdv_sd = NULL; 613 pdv->pdv_sd = NULL;
614 return ERR_PTR(-ENODEV); 614 return ERR_PTR(-ENODEV);
615 } 615 }
616 return dev; 616 return dev;
617 } 617 }
618 spin_unlock_irq(sh->host_lock); 618 spin_unlock_irq(sh->host_lock);
619 619
620 pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, 620 pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no,
621 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); 621 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id);
622 622
623 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 623 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
624 scsi_host_put(sh); 624 scsi_host_put(sh);
625 else if (legacy_mode_enable) { 625 else if (legacy_mode_enable) {
626 pscsi_pmode_enable_hba(hba, 0); 626 pscsi_pmode_enable_hba(hba, 0);
627 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 627 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
628 } 628 }
629 629
630 return ERR_PTR(-ENODEV); 630 return ERR_PTR(-ENODEV);
631 } 631 }
632 632
633 /* pscsi_free_device(): (Part of se_subsystem_api_t template) 633 /* pscsi_free_device(): (Part of se_subsystem_api_t template)
634 * 634 *
635 * 635 *
636 */ 636 */
637 static void pscsi_free_device(void *p) 637 static void pscsi_free_device(void *p)
638 { 638 {
639 struct pscsi_dev_virt *pdv = p; 639 struct pscsi_dev_virt *pdv = p;
640 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; 640 struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
641 struct scsi_device *sd = pdv->pdv_sd; 641 struct scsi_device *sd = pdv->pdv_sd;
642 642
643 if (sd) { 643 if (sd) {
644 /* 644 /*
645 * Release exclusive pSCSI internal struct block_device claim for 645 * Release exclusive pSCSI internal struct block_device claim for
646 * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() 646 * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
647 */ 647 */
648 if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { 648 if ((sd->type == TYPE_DISK) && pdv->pdv_bd) {
649 blkdev_put(pdv->pdv_bd, 649 blkdev_put(pdv->pdv_bd,
650 FMODE_WRITE|FMODE_READ|FMODE_EXCL); 650 FMODE_WRITE|FMODE_READ|FMODE_EXCL);
651 pdv->pdv_bd = NULL; 651 pdv->pdv_bd = NULL;
652 } 652 }
653 /* 653 /*
654 * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference 654 * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
655 * to struct Scsi_Host now. 655 * to struct Scsi_Host now.
656 */ 656 */
657 if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && 657 if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
658 (phv->phv_lld_host != NULL)) 658 (phv->phv_lld_host != NULL))
659 scsi_host_put(phv->phv_lld_host); 659 scsi_host_put(phv->phv_lld_host);
660 660
661 if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) 661 if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM))
662 scsi_device_put(sd); 662 scsi_device_put(sd);
663 663
664 pdv->pdv_sd = NULL; 664 pdv->pdv_sd = NULL;
665 } 665 }
666 666
667 kfree(pdv); 667 kfree(pdv);
668 } 668 }
669 669
670 static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, 670 static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
671 unsigned char *sense_buffer) 671 unsigned char *sense_buffer)
672 { 672 {
673 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 673 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
674 struct scsi_device *sd = pdv->pdv_sd; 674 struct scsi_device *sd = pdv->pdv_sd;
675 int result; 675 int result;
676 struct pscsi_plugin_task *pt = cmd->priv; 676 struct pscsi_plugin_task *pt = cmd->priv;
677 unsigned char *cdb; 677 unsigned char *cdb;
678 /* 678 /*
679 * Special case for REPORT_LUNs handling where pscsi_plugin_task has 679 * Special case for REPORT_LUNs handling where pscsi_plugin_task has
680 * not been allocated because TCM is handling the emulation directly. 680 * not been allocated because TCM is handling the emulation directly.
681 */ 681 */
682 if (!pt) 682 if (!pt)
683 return; 683 return;
684 684
685 cdb = &pt->pscsi_cdb[0]; 685 cdb = &pt->pscsi_cdb[0];
686 result = pt->pscsi_result; 686 result = pt->pscsi_result;
687 /* 687 /*
688 * Hack to make sure that Write-Protect modepage is set if R/O mode is 688 * Hack to make sure that Write-Protect modepage is set if R/O mode is
689 * forced. 689 * forced.
690 */ 690 */
691 if (!cmd->se_deve || !cmd->data_length)
692 goto after_mode_sense;
693
691 if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && 694 if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
692 (status_byte(result) << 1) == SAM_STAT_GOOD) { 695 (status_byte(result) << 1) == SAM_STAT_GOOD) {
693 if (!cmd->se_deve)
694 goto after_mode_sense;
695
696 if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { 696 if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) {
697 unsigned char *buf = transport_kmap_data_sg(cmd); 697 unsigned char *buf = transport_kmap_data_sg(cmd);
698 698
699 if (cdb[0] == MODE_SENSE_10) { 699 if (cdb[0] == MODE_SENSE_10) {
700 if (!(buf[3] & 0x80)) 700 if (!(buf[3] & 0x80))
701 buf[3] |= 0x80; 701 buf[3] |= 0x80;
702 } else { 702 } else {
703 if (!(buf[2] & 0x80)) 703 if (!(buf[2] & 0x80))
704 buf[2] |= 0x80; 704 buf[2] |= 0x80;
705 } 705 }
706 706
707 transport_kunmap_data_sg(cmd); 707 transport_kunmap_data_sg(cmd);
708 } 708 }
709 } 709 }
710 after_mode_sense: 710 after_mode_sense:
711 711
712 if (sd->type != TYPE_TAPE) 712 if (sd->type != TYPE_TAPE || !cmd->data_length)
713 goto after_mode_select; 713 goto after_mode_select;
714 714
715 /* 715 /*
716 * Hack to correctly obtain the initiator requested blocksize for 716 * Hack to correctly obtain the initiator requested blocksize for
717 * TYPE_TAPE. Since this value is dependent upon each tape media, 717 * TYPE_TAPE. Since this value is dependent upon each tape media,
718 * struct scsi_device->sector_size will not contain the correct value 718 * struct scsi_device->sector_size will not contain the correct value
719 * by default, so we go ahead and set it so 719 * by default, so we go ahead and set it so
720 * TRANSPORT(dev)->get_blockdev() returns the correct value to the 720 * TRANSPORT(dev)->get_blockdev() returns the correct value to the
721 * storage engine. 721 * storage engine.
722 */ 722 */
723 if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && 723 if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
724 (status_byte(result) << 1) == SAM_STAT_GOOD) { 724 (status_byte(result) << 1) == SAM_STAT_GOOD) {
725 unsigned char *buf; 725 unsigned char *buf;
726 u16 bdl; 726 u16 bdl;
727 u32 blocksize; 727 u32 blocksize;
728 728
729 buf = sg_virt(&sg[0]); 729 buf = sg_virt(&sg[0]);
730 if (!buf) { 730 if (!buf) {
731 pr_err("Unable to get buf for scatterlist\n"); 731 pr_err("Unable to get buf for scatterlist\n");
732 goto after_mode_select; 732 goto after_mode_select;
733 } 733 }
734 734
735 if (cdb[0] == MODE_SELECT) 735 if (cdb[0] == MODE_SELECT)
736 bdl = (buf[3]); 736 bdl = (buf[3]);
737 else 737 else
738 bdl = (buf[6] << 8) | (buf[7]); 738 bdl = (buf[6] << 8) | (buf[7]);
739 739
740 if (!bdl) 740 if (!bdl)
741 goto after_mode_select; 741 goto after_mode_select;
742 742
743 if (cdb[0] == MODE_SELECT) 743 if (cdb[0] == MODE_SELECT)
744 blocksize = (buf[9] << 16) | (buf[10] << 8) | 744 blocksize = (buf[9] << 16) | (buf[10] << 8) |
745 (buf[11]); 745 (buf[11]);
746 else 746 else
747 blocksize = (buf[13] << 16) | (buf[14] << 8) | 747 blocksize = (buf[13] << 16) | (buf[14] << 8) |
748 (buf[15]); 748 (buf[15]);
749 749
750 sd->sector_size = blocksize; 750 sd->sector_size = blocksize;
751 } 751 }
752 after_mode_select: 752 after_mode_select:
753 753
754 if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { 754 if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) {
755 memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); 755 memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER);
756 cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; 756 cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
757 } 757 }
758 } 758 }
759 759
760 enum { 760 enum {
761 Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, 761 Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
762 Opt_scsi_lun_id, Opt_err 762 Opt_scsi_lun_id, Opt_err
763 }; 763 };
764 764
765 static match_table_t tokens = { 765 static match_table_t tokens = {
766 {Opt_scsi_host_id, "scsi_host_id=%d"}, 766 {Opt_scsi_host_id, "scsi_host_id=%d"},
767 {Opt_scsi_channel_id, "scsi_channel_id=%d"}, 767 {Opt_scsi_channel_id, "scsi_channel_id=%d"},
768 {Opt_scsi_target_id, "scsi_target_id=%d"}, 768 {Opt_scsi_target_id, "scsi_target_id=%d"},
769 {Opt_scsi_lun_id, "scsi_lun_id=%d"}, 769 {Opt_scsi_lun_id, "scsi_lun_id=%d"},
770 {Opt_err, NULL} 770 {Opt_err, NULL}
771 }; 771 };
772 772
773 static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, 773 static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba,
774 struct se_subsystem_dev *se_dev, 774 struct se_subsystem_dev *se_dev,
775 const char *page, 775 const char *page,
776 ssize_t count) 776 ssize_t count)
777 { 777 {
778 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 778 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
779 struct pscsi_hba_virt *phv = hba->hba_ptr; 779 struct pscsi_hba_virt *phv = hba->hba_ptr;
780 char *orig, *ptr, *opts; 780 char *orig, *ptr, *opts;
781 substring_t args[MAX_OPT_ARGS]; 781 substring_t args[MAX_OPT_ARGS];
782 int ret = 0, arg, token; 782 int ret = 0, arg, token;
783 783
784 opts = kstrdup(page, GFP_KERNEL); 784 opts = kstrdup(page, GFP_KERNEL);
785 if (!opts) 785 if (!opts)
786 return -ENOMEM; 786 return -ENOMEM;
787 787
788 orig = opts; 788 orig = opts;
789 789
790 while ((ptr = strsep(&opts, ",\n")) != NULL) { 790 while ((ptr = strsep(&opts, ",\n")) != NULL) {
791 if (!*ptr) 791 if (!*ptr)
792 continue; 792 continue;
793 793
794 token = match_token(ptr, tokens, args); 794 token = match_token(ptr, tokens, args);
795 switch (token) { 795 switch (token) {
796 case Opt_scsi_host_id: 796 case Opt_scsi_host_id:
797 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { 797 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
798 pr_err("PSCSI[%d]: Unable to accept" 798 pr_err("PSCSI[%d]: Unable to accept"
799 " scsi_host_id while phv_mode ==" 799 " scsi_host_id while phv_mode =="
800 " PHV_LLD_SCSI_HOST_NO\n", 800 " PHV_LLD_SCSI_HOST_NO\n",
801 phv->phv_host_id); 801 phv->phv_host_id);
802 ret = -EINVAL; 802 ret = -EINVAL;
803 goto out; 803 goto out;
804 } 804 }
805 match_int(args, &arg); 805 match_int(args, &arg);
806 pdv->pdv_host_id = arg; 806 pdv->pdv_host_id = arg;
807 pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" 807 pr_debug("PSCSI[%d]: Referencing SCSI Host ID:"
808 " %d\n", phv->phv_host_id, pdv->pdv_host_id); 808 " %d\n", phv->phv_host_id, pdv->pdv_host_id);
809 pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; 809 pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID;
810 break; 810 break;
811 case Opt_scsi_channel_id: 811 case Opt_scsi_channel_id:
812 match_int(args, &arg); 812 match_int(args, &arg);
813 pdv->pdv_channel_id = arg; 813 pdv->pdv_channel_id = arg;
814 pr_debug("PSCSI[%d]: Referencing SCSI Channel" 814 pr_debug("PSCSI[%d]: Referencing SCSI Channel"
815 " ID: %d\n", phv->phv_host_id, 815 " ID: %d\n", phv->phv_host_id,
816 pdv->pdv_channel_id); 816 pdv->pdv_channel_id);
817 pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; 817 pdv->pdv_flags |= PDF_HAS_CHANNEL_ID;
818 break; 818 break;
819 case Opt_scsi_target_id: 819 case Opt_scsi_target_id:
820 match_int(args, &arg); 820 match_int(args, &arg);
821 pdv->pdv_target_id = arg; 821 pdv->pdv_target_id = arg;
822 pr_debug("PSCSI[%d]: Referencing SCSI Target" 822 pr_debug("PSCSI[%d]: Referencing SCSI Target"
823 " ID: %d\n", phv->phv_host_id, 823 " ID: %d\n", phv->phv_host_id,
824 pdv->pdv_target_id); 824 pdv->pdv_target_id);
825 pdv->pdv_flags |= PDF_HAS_TARGET_ID; 825 pdv->pdv_flags |= PDF_HAS_TARGET_ID;
826 break; 826 break;
827 case Opt_scsi_lun_id: 827 case Opt_scsi_lun_id:
828 match_int(args, &arg); 828 match_int(args, &arg);
829 pdv->pdv_lun_id = arg; 829 pdv->pdv_lun_id = arg;
830 pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" 830 pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:"
831 " %d\n", phv->phv_host_id, pdv->pdv_lun_id); 831 " %d\n", phv->phv_host_id, pdv->pdv_lun_id);
832 pdv->pdv_flags |= PDF_HAS_LUN_ID; 832 pdv->pdv_flags |= PDF_HAS_LUN_ID;
833 break; 833 break;
834 default: 834 default:
835 break; 835 break;
836 } 836 }
837 } 837 }
838 838
839 out: 839 out:
840 kfree(orig); 840 kfree(orig);
841 return (!ret) ? count : ret; 841 return (!ret) ? count : ret;
842 } 842 }
843 843
844 static ssize_t pscsi_check_configfs_dev_params( 844 static ssize_t pscsi_check_configfs_dev_params(
845 struct se_hba *hba, 845 struct se_hba *hba,
846 struct se_subsystem_dev *se_dev) 846 struct se_subsystem_dev *se_dev)
847 { 847 {
848 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 848 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
849 849
850 if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || 850 if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
851 !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || 851 !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
852 !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { 852 !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
853 pr_err("Missing scsi_channel_id=, scsi_target_id= and" 853 pr_err("Missing scsi_channel_id=, scsi_target_id= and"
854 " scsi_lun_id= parameters\n"); 854 " scsi_lun_id= parameters\n");
855 return -EINVAL; 855 return -EINVAL;
856 } 856 }
857 857
858 return 0; 858 return 0;
859 } 859 }
860 860
861 static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, 861 static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba,
862 struct se_subsystem_dev *se_dev, 862 struct se_subsystem_dev *se_dev,
863 char *b) 863 char *b)
864 { 864 {
865 struct pscsi_hba_virt *phv = hba->hba_ptr; 865 struct pscsi_hba_virt *phv = hba->hba_ptr;
866 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; 866 struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
867 struct scsi_device *sd = pdv->pdv_sd; 867 struct scsi_device *sd = pdv->pdv_sd;
868 unsigned char host_id[16]; 868 unsigned char host_id[16];
869 ssize_t bl; 869 ssize_t bl;
870 int i; 870 int i;
871 871
872 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) 872 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
873 snprintf(host_id, 16, "%d", pdv->pdv_host_id); 873 snprintf(host_id, 16, "%d", pdv->pdv_host_id);
874 else 874 else
875 snprintf(host_id, 16, "PHBA Mode"); 875 snprintf(host_id, 16, "PHBA Mode");
876 876
877 bl = sprintf(b, "SCSI Device Bus Location:" 877 bl = sprintf(b, "SCSI Device Bus Location:"
878 " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", 878 " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
879 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, 879 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id,
880 host_id); 880 host_id);
881 881
882 if (sd) { 882 if (sd) {
883 bl += sprintf(b + bl, " "); 883 bl += sprintf(b + bl, " ");
884 bl += sprintf(b + bl, "Vendor: "); 884 bl += sprintf(b + bl, "Vendor: ");
885 for (i = 0; i < 8; i++) { 885 for (i = 0; i < 8; i++) {
886 if (ISPRINT(sd->vendor[i])) /* printable character? */ 886 if (ISPRINT(sd->vendor[i])) /* printable character? */
887 bl += sprintf(b + bl, "%c", sd->vendor[i]); 887 bl += sprintf(b + bl, "%c", sd->vendor[i]);
888 else 888 else
889 bl += sprintf(b + bl, " "); 889 bl += sprintf(b + bl, " ");
890 } 890 }
891 bl += sprintf(b + bl, " Model: "); 891 bl += sprintf(b + bl, " Model: ");
892 for (i = 0; i < 16; i++) { 892 for (i = 0; i < 16; i++) {
893 if (ISPRINT(sd->model[i])) /* printable character ? */ 893 if (ISPRINT(sd->model[i])) /* printable character ? */
894 bl += sprintf(b + bl, "%c", sd->model[i]); 894 bl += sprintf(b + bl, "%c", sd->model[i]);
895 else 895 else
896 bl += sprintf(b + bl, " "); 896 bl += sprintf(b + bl, " ");
897 } 897 }
898 bl += sprintf(b + bl, " Rev: "); 898 bl += sprintf(b + bl, " Rev: ");
899 for (i = 0; i < 4; i++) { 899 for (i = 0; i < 4; i++) {
900 if (ISPRINT(sd->rev[i])) /* printable character ? */ 900 if (ISPRINT(sd->rev[i])) /* printable character ? */
901 bl += sprintf(b + bl, "%c", sd->rev[i]); 901 bl += sprintf(b + bl, "%c", sd->rev[i]);
902 else 902 else
903 bl += sprintf(b + bl, " "); 903 bl += sprintf(b + bl, " ");
904 } 904 }
905 bl += sprintf(b + bl, "\n"); 905 bl += sprintf(b + bl, "\n");
906 } 906 }
907 return bl; 907 return bl;
908 } 908 }
909 909
910 static void pscsi_bi_endio(struct bio *bio, int error) 910 static void pscsi_bi_endio(struct bio *bio, int error)
911 { 911 {
912 bio_put(bio); 912 bio_put(bio);
913 } 913 }
914 914
915 static inline struct bio *pscsi_get_bio(int sg_num) 915 static inline struct bio *pscsi_get_bio(int sg_num)
916 { 916 {
917 struct bio *bio; 917 struct bio *bio;
918 /* 918 /*
919 * Use bio_malloc() following the comment in for bio -> struct request 919 * Use bio_malloc() following the comment in for bio -> struct request
920 * in block/blk-core.c:blk_make_request() 920 * in block/blk-core.c:blk_make_request()
921 */ 921 */
922 bio = bio_kmalloc(GFP_KERNEL, sg_num); 922 bio = bio_kmalloc(GFP_KERNEL, sg_num);
923 if (!bio) { 923 if (!bio) {
924 pr_err("PSCSI: bio_kmalloc() failed\n"); 924 pr_err("PSCSI: bio_kmalloc() failed\n");
925 return NULL; 925 return NULL;
926 } 926 }
927 bio->bi_end_io = pscsi_bi_endio; 927 bio->bi_end_io = pscsi_bi_endio;
928 928
929 return bio; 929 return bio;
930 } 930 }
931 931
932 static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, 932 static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl,
933 u32 sgl_nents, enum dma_data_direction data_direction, 933 u32 sgl_nents, enum dma_data_direction data_direction,
934 struct bio **hbio) 934 struct bio **hbio)
935 { 935 {
936 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 936 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
937 struct bio *bio = NULL, *tbio = NULL; 937 struct bio *bio = NULL, *tbio = NULL;
938 struct page *page; 938 struct page *page;
939 struct scatterlist *sg; 939 struct scatterlist *sg;
940 u32 data_len = cmd->data_length, i, len, bytes, off; 940 u32 data_len = cmd->data_length, i, len, bytes, off;
941 int nr_pages = (cmd->data_length + sgl[0].offset + 941 int nr_pages = (cmd->data_length + sgl[0].offset +
942 PAGE_SIZE - 1) >> PAGE_SHIFT; 942 PAGE_SIZE - 1) >> PAGE_SHIFT;
943 int nr_vecs = 0, rc; 943 int nr_vecs = 0, rc;
944 int rw = (data_direction == DMA_TO_DEVICE); 944 int rw = (data_direction == DMA_TO_DEVICE);
945 945
946 *hbio = NULL; 946 *hbio = NULL;
947 947
948 pr_debug("PSCSI: nr_pages: %d\n", nr_pages); 948 pr_debug("PSCSI: nr_pages: %d\n", nr_pages);
949 949
950 for_each_sg(sgl, sg, sgl_nents, i) { 950 for_each_sg(sgl, sg, sgl_nents, i) {
951 page = sg_page(sg); 951 page = sg_page(sg);
952 off = sg->offset; 952 off = sg->offset;
953 len = sg->length; 953 len = sg->length;
954 954
955 pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, 955 pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i,
956 page, len, off); 956 page, len, off);
957 957
958 while (len > 0 && data_len > 0) { 958 while (len > 0 && data_len > 0) {
959 bytes = min_t(unsigned int, len, PAGE_SIZE - off); 959 bytes = min_t(unsigned int, len, PAGE_SIZE - off);
960 bytes = min(bytes, data_len); 960 bytes = min(bytes, data_len);
961 961
962 if (!bio) { 962 if (!bio) {
963 nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); 963 nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
964 nr_pages -= nr_vecs; 964 nr_pages -= nr_vecs;
965 /* 965 /*
966 * Calls bio_kmalloc() and sets bio->bi_end_io() 966 * Calls bio_kmalloc() and sets bio->bi_end_io()
967 */ 967 */
968 bio = pscsi_get_bio(nr_vecs); 968 bio = pscsi_get_bio(nr_vecs);
969 if (!bio) 969 if (!bio)
970 goto fail; 970 goto fail;
971 971
972 if (rw) 972 if (rw)
973 bio->bi_rw |= REQ_WRITE; 973 bio->bi_rw |= REQ_WRITE;
974 974
975 pr_debug("PSCSI: Allocated bio: %p," 975 pr_debug("PSCSI: Allocated bio: %p,"
976 " dir: %s nr_vecs: %d\n", bio, 976 " dir: %s nr_vecs: %d\n", bio,
977 (rw) ? "rw" : "r", nr_vecs); 977 (rw) ? "rw" : "r", nr_vecs);
978 /* 978 /*
979 * Set *hbio pointer to handle the case: 979 * Set *hbio pointer to handle the case:
980 * nr_pages > BIO_MAX_PAGES, where additional 980 * nr_pages > BIO_MAX_PAGES, where additional
981 * bios need to be added to complete a given 981 * bios need to be added to complete a given
982 * command. 982 * command.
983 */ 983 */
984 if (!*hbio) 984 if (!*hbio)
985 *hbio = tbio = bio; 985 *hbio = tbio = bio;
986 else 986 else
987 tbio = tbio->bi_next = bio; 987 tbio = tbio->bi_next = bio;
988 } 988 }
989 989
990 pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" 990 pr_debug("PSCSI: Calling bio_add_pc_page() i: %d"
991 " bio: %p page: %p len: %d off: %d\n", i, bio, 991 " bio: %p page: %p len: %d off: %d\n", i, bio,
992 page, len, off); 992 page, len, off);
993 993
994 rc = bio_add_pc_page(pdv->pdv_sd->request_queue, 994 rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
995 bio, page, bytes, off); 995 bio, page, bytes, off);
996 if (rc != bytes) 996 if (rc != bytes)
997 goto fail; 997 goto fail;
998 998
999 pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", 999 pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
1000 bio->bi_vcnt, nr_vecs); 1000 bio->bi_vcnt, nr_vecs);
1001 1001
1002 if (bio->bi_vcnt > nr_vecs) { 1002 if (bio->bi_vcnt > nr_vecs) {
1003 pr_debug("PSCSI: Reached bio->bi_vcnt max:" 1003 pr_debug("PSCSI: Reached bio->bi_vcnt max:"
1004 " %d i: %d bio: %p, allocating another" 1004 " %d i: %d bio: %p, allocating another"
1005 " bio\n", bio->bi_vcnt, i, bio); 1005 " bio\n", bio->bi_vcnt, i, bio);
1006 /* 1006 /*
1007 * Clear the pointer so that another bio will 1007 * Clear the pointer so that another bio will
1008 * be allocated with pscsi_get_bio() above, the 1008 * be allocated with pscsi_get_bio() above, the
1009 * current bio has already been set *tbio and 1009 * current bio has already been set *tbio and
1010 * bio->bi_next. 1010 * bio->bi_next.
1011 */ 1011 */
1012 bio = NULL; 1012 bio = NULL;
1013 } 1013 }
1014 1014
1015 page++; 1015 page++;
1016 len -= bytes; 1016 len -= bytes;
1017 data_len -= bytes; 1017 data_len -= bytes;
1018 off = 0; 1018 off = 0;
1019 } 1019 }
1020 } 1020 }
1021 1021
1022 return sgl_nents; 1022 return sgl_nents;
1023 fail: 1023 fail:
1024 while (*hbio) { 1024 while (*hbio) {
1025 bio = *hbio; 1025 bio = *hbio;
1026 *hbio = (*hbio)->bi_next; 1026 *hbio = (*hbio)->bi_next;
1027 bio->bi_next = NULL; 1027 bio->bi_next = NULL;
1028 bio_endio(bio, 0); /* XXX: should be error */ 1028 bio_endio(bio, 0); /* XXX: should be error */
1029 } 1029 }
1030 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1030 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1031 return -ENOMEM; 1031 return -ENOMEM;
1032 } 1032 }
1033 1033
1034 /* 1034 /*
1035 * Clear a lun set in the cdb if the initiator talking to use spoke 1035 * Clear a lun set in the cdb if the initiator talking to use spoke
1036 * and old standards version, as we can't assume the underlying device 1036 * and old standards version, as we can't assume the underlying device
1037 * won't choke up on it. 1037 * won't choke up on it.
1038 */ 1038 */
1039 static inline void pscsi_clear_cdb_lun(unsigned char *cdb) 1039 static inline void pscsi_clear_cdb_lun(unsigned char *cdb)
1040 { 1040 {
1041 switch (cdb[0]) { 1041 switch (cdb[0]) {
1042 case READ_10: /* SBC - RDProtect */ 1042 case READ_10: /* SBC - RDProtect */
1043 case READ_12: /* SBC - RDProtect */ 1043 case READ_12: /* SBC - RDProtect */
1044 case READ_16: /* SBC - RDProtect */ 1044 case READ_16: /* SBC - RDProtect */
1045 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ 1045 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
1046 case VERIFY: /* SBC - VRProtect */ 1046 case VERIFY: /* SBC - VRProtect */
1047 case VERIFY_16: /* SBC - VRProtect */ 1047 case VERIFY_16: /* SBC - VRProtect */
1048 case WRITE_VERIFY: /* SBC - VRProtect */ 1048 case WRITE_VERIFY: /* SBC - VRProtect */
1049 case WRITE_VERIFY_12: /* SBC - VRProtect */ 1049 case WRITE_VERIFY_12: /* SBC - VRProtect */
1050 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ 1050 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
1051 break; 1051 break;
1052 default: 1052 default:
1053 cdb[1] &= 0x1f; /* clear logical unit number */ 1053 cdb[1] &= 0x1f; /* clear logical unit number */
1054 break; 1054 break;
1055 } 1055 }
1056 } 1056 }
1057 1057
1058 static int pscsi_parse_cdb(struct se_cmd *cmd) 1058 static int pscsi_parse_cdb(struct se_cmd *cmd)
1059 { 1059 {
1060 unsigned char *cdb = cmd->t_task_cdb; 1060 unsigned char *cdb = cmd->t_task_cdb;
1061 unsigned int dummy_size; 1061 unsigned int dummy_size;
1062 int ret; 1062 int ret;
1063 1063
1064 if (cmd->se_cmd_flags & SCF_BIDI) { 1064 if (cmd->se_cmd_flags & SCF_BIDI) {
1065 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1065 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1066 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1066 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1067 return -EINVAL; 1067 return -EINVAL;
1068 } 1068 }
1069 1069
1070 pscsi_clear_cdb_lun(cdb); 1070 pscsi_clear_cdb_lun(cdb);
1071 1071
1072 /* 1072 /*
1073 * For REPORT LUNS we always need to emulate the response, for everything 1073 * For REPORT LUNS we always need to emulate the response, for everything
1074 * else the default for pSCSI is to pass the command to the underlying 1074 * else the default for pSCSI is to pass the command to the underlying
1075 * LLD / physical hardware. 1075 * LLD / physical hardware.
1076 */ 1076 */
1077 switch (cdb[0]) { 1077 switch (cdb[0]) {
1078 case REPORT_LUNS: 1078 case REPORT_LUNS:
1079 ret = spc_parse_cdb(cmd, &dummy_size); 1079 ret = spc_parse_cdb(cmd, &dummy_size);
1080 if (ret) 1080 if (ret)
1081 return ret; 1081 return ret;
1082 break; 1082 break;
1083 case READ_6: 1083 case READ_6:
1084 case READ_10: 1084 case READ_10:
1085 case READ_12: 1085 case READ_12:
1086 case READ_16: 1086 case READ_16:
1087 case WRITE_6: 1087 case WRITE_6:
1088 case WRITE_10: 1088 case WRITE_10:
1089 case WRITE_12: 1089 case WRITE_12:
1090 case WRITE_16: 1090 case WRITE_16:
1091 case WRITE_VERIFY: 1091 case WRITE_VERIFY:
1092 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1092 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1093 /* FALLTHROUGH*/ 1093 /* FALLTHROUGH*/
1094 default: 1094 default:
1095 cmd->execute_cmd = pscsi_execute_cmd; 1095 cmd->execute_cmd = pscsi_execute_cmd;
1096 break; 1096 break;
1097 } 1097 }
1098 1098
1099 return 0; 1099 return 0;
1100 } 1100 }
1101 1101
1102 static int pscsi_execute_cmd(struct se_cmd *cmd) 1102 static int pscsi_execute_cmd(struct se_cmd *cmd)
1103 { 1103 {
1104 struct scatterlist *sgl = cmd->t_data_sg; 1104 struct scatterlist *sgl = cmd->t_data_sg;
1105 u32 sgl_nents = cmd->t_data_nents; 1105 u32 sgl_nents = cmd->t_data_nents;
1106 enum dma_data_direction data_direction = cmd->data_direction; 1106 enum dma_data_direction data_direction = cmd->data_direction;
1107 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; 1107 struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
1108 struct pscsi_plugin_task *pt; 1108 struct pscsi_plugin_task *pt;
1109 struct request *req; 1109 struct request *req;
1110 struct bio *hbio; 1110 struct bio *hbio;
1111 int ret; 1111 int ret;
1112 1112
1113 /* 1113 /*
1114 * Dynamically alloc cdb space, since it may be larger than 1114 * Dynamically alloc cdb space, since it may be larger than
1115 * TCM_MAX_COMMAND_SIZE 1115 * TCM_MAX_COMMAND_SIZE
1116 */ 1116 */
1117 pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); 1117 pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL);
1118 if (!pt) { 1118 if (!pt) {
1119 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1119 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1120 return -ENOMEM; 1120 return -ENOMEM;
1121 } 1121 }
1122 cmd->priv = pt; 1122 cmd->priv = pt;
1123 1123
1124 memcpy(pt->pscsi_cdb, cmd->t_task_cdb, 1124 memcpy(pt->pscsi_cdb, cmd->t_task_cdb,
1125 scsi_command_size(cmd->t_task_cdb)); 1125 scsi_command_size(cmd->t_task_cdb));
1126 1126
1127 if (!sgl) { 1127 if (!sgl) {
1128 req = blk_get_request(pdv->pdv_sd->request_queue, 1128 req = blk_get_request(pdv->pdv_sd->request_queue,
1129 (data_direction == DMA_TO_DEVICE), 1129 (data_direction == DMA_TO_DEVICE),
1130 GFP_KERNEL); 1130 GFP_KERNEL);
1131 if (!req || IS_ERR(req)) { 1131 if (!req || IS_ERR(req)) {
1132 pr_err("PSCSI: blk_get_request() failed: %ld\n", 1132 pr_err("PSCSI: blk_get_request() failed: %ld\n",
1133 req ? IS_ERR(req) : -ENOMEM); 1133 req ? IS_ERR(req) : -ENOMEM);
1134 cmd->scsi_sense_reason = 1134 cmd->scsi_sense_reason =
1135 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1135 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1136 goto fail; 1136 goto fail;
1137 } 1137 }
1138 } else { 1138 } else {
1139 BUG_ON(!cmd->data_length); 1139 BUG_ON(!cmd->data_length);
1140 1140
1141 ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); 1141 ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio);
1142 if (ret < 0) { 1142 if (ret < 0) {
1143 cmd->scsi_sense_reason = 1143 cmd->scsi_sense_reason =
1144 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1144 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1145 goto fail; 1145 goto fail;
1146 } 1146 }
1147 1147
1148 req = blk_make_request(pdv->pdv_sd->request_queue, hbio, 1148 req = blk_make_request(pdv->pdv_sd->request_queue, hbio,
1149 GFP_KERNEL); 1149 GFP_KERNEL);
1150 if (IS_ERR(req)) { 1150 if (IS_ERR(req)) {
1151 pr_err("pSCSI: blk_make_request() failed\n"); 1151 pr_err("pSCSI: blk_make_request() failed\n");
1152 goto fail_free_bio; 1152 goto fail_free_bio;
1153 } 1153 }
1154 } 1154 }
1155 1155
1156 req->cmd_type = REQ_TYPE_BLOCK_PC; 1156 req->cmd_type = REQ_TYPE_BLOCK_PC;
1157 req->end_io = pscsi_req_done; 1157 req->end_io = pscsi_req_done;
1158 req->end_io_data = cmd; 1158 req->end_io_data = cmd;
1159 req->cmd_len = scsi_command_size(pt->pscsi_cdb); 1159 req->cmd_len = scsi_command_size(pt->pscsi_cdb);
1160 req->cmd = &pt->pscsi_cdb[0]; 1160 req->cmd = &pt->pscsi_cdb[0];
1161 req->sense = &pt->pscsi_sense[0]; 1161 req->sense = &pt->pscsi_sense[0];
1162 req->sense_len = 0; 1162 req->sense_len = 0;
1163 if (pdv->pdv_sd->type == TYPE_DISK) 1163 if (pdv->pdv_sd->type == TYPE_DISK)
1164 req->timeout = PS_TIMEOUT_DISK; 1164 req->timeout = PS_TIMEOUT_DISK;
1165 else 1165 else
1166 req->timeout = PS_TIMEOUT_OTHER; 1166 req->timeout = PS_TIMEOUT_OTHER;
1167 req->retries = PS_RETRY; 1167 req->retries = PS_RETRY;
1168 1168
1169 blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, 1169 blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
1170 (cmd->sam_task_attr == MSG_HEAD_TAG), 1170 (cmd->sam_task_attr == MSG_HEAD_TAG),
1171 pscsi_req_done); 1171 pscsi_req_done);
1172 1172
1173 return 0; 1173 return 0;
1174 1174
1175 fail_free_bio: 1175 fail_free_bio:
1176 while (hbio) { 1176 while (hbio) {
1177 struct bio *bio = hbio; 1177 struct bio *bio = hbio;
1178 hbio = hbio->bi_next; 1178 hbio = hbio->bi_next;
1179 bio->bi_next = NULL; 1179 bio->bi_next = NULL;
1180 bio_endio(bio, 0); /* XXX: should be error */ 1180 bio_endio(bio, 0); /* XXX: should be error */
1181 } 1181 }
1182 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1182 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1183 fail: 1183 fail:
1184 kfree(pt); 1184 kfree(pt);
1185 return -ENOMEM; 1185 return -ENOMEM;
1186 } 1186 }
1187 1187
1188 /* pscsi_get_device_rev(): 1188 /* pscsi_get_device_rev():
1189 * 1189 *
1190 * 1190 *
1191 */ 1191 */
1192 static u32 pscsi_get_device_rev(struct se_device *dev) 1192 static u32 pscsi_get_device_rev(struct se_device *dev)
1193 { 1193 {
1194 struct pscsi_dev_virt *pdv = dev->dev_ptr; 1194 struct pscsi_dev_virt *pdv = dev->dev_ptr;
1195 struct scsi_device *sd = pdv->pdv_sd; 1195 struct scsi_device *sd = pdv->pdv_sd;
1196 1196
1197 return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; 1197 return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1;
1198 } 1198 }
1199 1199
1200 /* pscsi_get_device_type(): 1200 /* pscsi_get_device_type():
1201 * 1201 *
1202 * 1202 *
1203 */ 1203 */
1204 static u32 pscsi_get_device_type(struct se_device *dev) 1204 static u32 pscsi_get_device_type(struct se_device *dev)
1205 { 1205 {
1206 struct pscsi_dev_virt *pdv = dev->dev_ptr; 1206 struct pscsi_dev_virt *pdv = dev->dev_ptr;
1207 struct scsi_device *sd = pdv->pdv_sd; 1207 struct scsi_device *sd = pdv->pdv_sd;
1208 1208
1209 return sd->type; 1209 return sd->type;
1210 } 1210 }
1211 1211
1212 static sector_t pscsi_get_blocks(struct se_device *dev) 1212 static sector_t pscsi_get_blocks(struct se_device *dev)
1213 { 1213 {
1214 struct pscsi_dev_virt *pdv = dev->dev_ptr; 1214 struct pscsi_dev_virt *pdv = dev->dev_ptr;
1215 1215
1216 if (pdv->pdv_bd && pdv->pdv_bd->bd_part) 1216 if (pdv->pdv_bd && pdv->pdv_bd->bd_part)
1217 return pdv->pdv_bd->bd_part->nr_sects; 1217 return pdv->pdv_bd->bd_part->nr_sects;
1218 1218
1219 dump_stack(); 1219 dump_stack();
1220 return 0; 1220 return 0;
1221 } 1221 }
1222 1222
1223 static void pscsi_req_done(struct request *req, int uptodate) 1223 static void pscsi_req_done(struct request *req, int uptodate)
1224 { 1224 {
1225 struct se_cmd *cmd = req->end_io_data; 1225 struct se_cmd *cmd = req->end_io_data;
1226 struct pscsi_plugin_task *pt = cmd->priv; 1226 struct pscsi_plugin_task *pt = cmd->priv;
1227 1227
1228 pt->pscsi_result = req->errors; 1228 pt->pscsi_result = req->errors;
1229 pt->pscsi_resid = req->resid_len; 1229 pt->pscsi_resid = req->resid_len;
1230 1230
1231 cmd->scsi_status = status_byte(pt->pscsi_result) << 1; 1231 cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
1232 if (cmd->scsi_status) { 1232 if (cmd->scsi_status) {
1233 pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" 1233 pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
1234 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1234 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
1235 pt->pscsi_result); 1235 pt->pscsi_result);
1236 } 1236 }
1237 1237
1238 switch (host_byte(pt->pscsi_result)) { 1238 switch (host_byte(pt->pscsi_result)) {
1239 case DID_OK: 1239 case DID_OK:
1240 target_complete_cmd(cmd, cmd->scsi_status); 1240 target_complete_cmd(cmd, cmd->scsi_status);
1241 break; 1241 break;
1242 default: 1242 default:
1243 pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" 1243 pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
1244 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], 1244 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
1245 pt->pscsi_result); 1245 pt->pscsi_result);
1246 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1246 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1247 target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 1247 target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
1248 break; 1248 break;
1249 } 1249 }
1250 1250
1251 __blk_put_request(req->q, req); 1251 __blk_put_request(req->q, req);
1252 kfree(pt); 1252 kfree(pt);
1253 } 1253 }
1254 1254
1255 static struct se_subsystem_api pscsi_template = { 1255 static struct se_subsystem_api pscsi_template = {
1256 .name = "pscsi", 1256 .name = "pscsi",
1257 .owner = THIS_MODULE, 1257 .owner = THIS_MODULE,
1258 .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, 1258 .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV,
1259 .attach_hba = pscsi_attach_hba, 1259 .attach_hba = pscsi_attach_hba,
1260 .detach_hba = pscsi_detach_hba, 1260 .detach_hba = pscsi_detach_hba,
1261 .pmode_enable_hba = pscsi_pmode_enable_hba, 1261 .pmode_enable_hba = pscsi_pmode_enable_hba,
1262 .allocate_virtdevice = pscsi_allocate_virtdevice, 1262 .allocate_virtdevice = pscsi_allocate_virtdevice,
1263 .create_virtdevice = pscsi_create_virtdevice, 1263 .create_virtdevice = pscsi_create_virtdevice,
1264 .free_device = pscsi_free_device, 1264 .free_device = pscsi_free_device,
1265 .transport_complete = pscsi_transport_complete, 1265 .transport_complete = pscsi_transport_complete,
1266 .parse_cdb = pscsi_parse_cdb, 1266 .parse_cdb = pscsi_parse_cdb,
1267 .check_configfs_dev_params = pscsi_check_configfs_dev_params, 1267 .check_configfs_dev_params = pscsi_check_configfs_dev_params,
1268 .set_configfs_dev_params = pscsi_set_configfs_dev_params, 1268 .set_configfs_dev_params = pscsi_set_configfs_dev_params,
1269 .show_configfs_dev_params = pscsi_show_configfs_dev_params, 1269 .show_configfs_dev_params = pscsi_show_configfs_dev_params,
1270 .get_device_rev = pscsi_get_device_rev, 1270 .get_device_rev = pscsi_get_device_rev,
1271 .get_device_type = pscsi_get_device_type, 1271 .get_device_type = pscsi_get_device_type,
1272 .get_blocks = pscsi_get_blocks, 1272 .get_blocks = pscsi_get_blocks,
1273 }; 1273 };
1274 1274
1275 static int __init pscsi_module_init(void) 1275 static int __init pscsi_module_init(void)
1276 { 1276 {
1277 return transport_subsystem_register(&pscsi_template); 1277 return transport_subsystem_register(&pscsi_template);
1278 } 1278 }
1279 1279
1280 static void pscsi_module_exit(void) 1280 static void pscsi_module_exit(void)
1281 { 1281 {
1282 transport_subsystem_release(&pscsi_template); 1282 transport_subsystem_release(&pscsi_template);
1283 } 1283 }
1284 1284
1285 MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); 1285 MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
1286 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 1286 MODULE_AUTHOR("nab@Linux-iSCSI.org");
1287 MODULE_LICENSE("GPL"); 1287 MODULE_LICENSE("GPL");
1288 1288
drivers/target/target_core_transport.c
Diff comments   View file @ 306c11b
1 /******************************************************************************* 1 /*******************************************************************************
2 * Filename: target_core_transport.c 2 * Filename: target_core_transport.c
3 * 3 *
4 * This file contains the Generic Target Engine Core. 4 * This file contains the Generic Target Engine Core.
5 * 5 *
6 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. 6 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
7 * Copyright (c) 2005, 2006, 2007 SBE, Inc. 7 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
8 * Copyright (c) 2007-2010 Rising Tide Systems 8 * Copyright (c) 2007-2010 Rising Tide Systems
9 * Copyright (c) 2008-2010 Linux-iSCSI.org 9 * Copyright (c) 2008-2010 Linux-iSCSI.org
10 * 10 *
11 * Nicholas A. Bellinger <nab@kernel.org> 11 * Nicholas A. Bellinger <nab@kernel.org>
12 * 12 *
13 * This program is free software; you can redistribute it and/or modify 13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by 14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version. 16 * (at your option) any later version.
17 * 17 *
18 * This program is distributed in the hope that it will be useful, 18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details. 21 * GNU General Public License for more details.
22 * 22 *
23 * You should have received a copy of the GNU General Public License 23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 * 26 *
27 ******************************************************************************/ 27 ******************************************************************************/
28 28
29 #include <linux/net.h> 29 #include <linux/net.h>
30 #include <linux/delay.h> 30 #include <linux/delay.h>
31 #include <linux/string.h> 31 #include <linux/string.h>
32 #include <linux/timer.h> 32 #include <linux/timer.h>
33 #include <linux/slab.h> 33 #include <linux/slab.h>
34 #include <linux/blkdev.h> 34 #include <linux/blkdev.h>
35 #include <linux/spinlock.h> 35 #include <linux/spinlock.h>
36 #include <linux/kthread.h> 36 #include <linux/kthread.h>
37 #include <linux/in.h> 37 #include <linux/in.h>
38 #include <linux/cdrom.h> 38 #include <linux/cdrom.h>
39 #include <linux/module.h> 39 #include <linux/module.h>
40 #include <linux/ratelimit.h> 40 #include <linux/ratelimit.h>
41 #include <asm/unaligned.h> 41 #include <asm/unaligned.h>
42 #include <net/sock.h> 42 #include <net/sock.h>
43 #include <net/tcp.h> 43 #include <net/tcp.h>
44 #include <scsi/scsi.h> 44 #include <scsi/scsi.h>
45 #include <scsi/scsi_cmnd.h> 45 #include <scsi/scsi_cmnd.h>
46 #include <scsi/scsi_tcq.h> 46 #include <scsi/scsi_tcq.h>
47 47
48 #include <target/target_core_base.h> 48 #include <target/target_core_base.h>
49 #include <target/target_core_backend.h> 49 #include <target/target_core_backend.h>
50 #include <target/target_core_fabric.h> 50 #include <target/target_core_fabric.h>
51 #include <target/target_core_configfs.h> 51 #include <target/target_core_configfs.h>
52 52
53 #include "target_core_internal.h" 53 #include "target_core_internal.h"
54 #include "target_core_alua.h" 54 #include "target_core_alua.h"
55 #include "target_core_pr.h" 55 #include "target_core_pr.h"
56 #include "target_core_ua.h" 56 #include "target_core_ua.h"
57 57
58 static int sub_api_initialized; 58 static int sub_api_initialized;
59 59
60 static struct workqueue_struct *target_completion_wq; 60 static struct workqueue_struct *target_completion_wq;
61 static struct kmem_cache *se_sess_cache; 61 static struct kmem_cache *se_sess_cache;
62 struct kmem_cache *se_ua_cache; 62 struct kmem_cache *se_ua_cache;
63 struct kmem_cache *t10_pr_reg_cache; 63 struct kmem_cache *t10_pr_reg_cache;
64 struct kmem_cache *t10_alua_lu_gp_cache; 64 struct kmem_cache *t10_alua_lu_gp_cache;
65 struct kmem_cache *t10_alua_lu_gp_mem_cache; 65 struct kmem_cache *t10_alua_lu_gp_mem_cache;
66 struct kmem_cache *t10_alua_tg_pt_gp_cache; 66 struct kmem_cache *t10_alua_tg_pt_gp_cache;
67 struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; 67 struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
68 68
69 static void transport_complete_task_attr(struct se_cmd *cmd); 69 static void transport_complete_task_attr(struct se_cmd *cmd);
70 static void transport_handle_queue_full(struct se_cmd *cmd, 70 static void transport_handle_queue_full(struct se_cmd *cmd,
71 struct se_device *dev); 71 struct se_device *dev);
72 static int transport_generic_get_mem(struct se_cmd *cmd); 72 static int transport_generic_get_mem(struct se_cmd *cmd);
73 static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); 73 static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
74 static void transport_put_cmd(struct se_cmd *cmd); 74 static void transport_put_cmd(struct se_cmd *cmd);
75 static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); 75 static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq);
76 static void target_complete_ok_work(struct work_struct *work); 76 static void target_complete_ok_work(struct work_struct *work);
77 77
78 int init_se_kmem_caches(void) 78 int init_se_kmem_caches(void)
79 { 79 {
80 se_sess_cache = kmem_cache_create("se_sess_cache", 80 se_sess_cache = kmem_cache_create("se_sess_cache",
81 sizeof(struct se_session), __alignof__(struct se_session), 81 sizeof(struct se_session), __alignof__(struct se_session),
82 0, NULL); 82 0, NULL);
83 if (!se_sess_cache) { 83 if (!se_sess_cache) {
84 pr_err("kmem_cache_create() for struct se_session" 84 pr_err("kmem_cache_create() for struct se_session"
85 " failed\n"); 85 " failed\n");
86 goto out; 86 goto out;
87 } 87 }
88 se_ua_cache = kmem_cache_create("se_ua_cache", 88 se_ua_cache = kmem_cache_create("se_ua_cache",
89 sizeof(struct se_ua), __alignof__(struct se_ua), 89 sizeof(struct se_ua), __alignof__(struct se_ua),
90 0, NULL); 90 0, NULL);
91 if (!se_ua_cache) { 91 if (!se_ua_cache) {
92 pr_err("kmem_cache_create() for struct se_ua failed\n"); 92 pr_err("kmem_cache_create() for struct se_ua failed\n");
93 goto out_free_sess_cache; 93 goto out_free_sess_cache;
94 } 94 }
95 t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", 95 t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache",
96 sizeof(struct t10_pr_registration), 96 sizeof(struct t10_pr_registration),
97 __alignof__(struct t10_pr_registration), 0, NULL); 97 __alignof__(struct t10_pr_registration), 0, NULL);
98 if (!t10_pr_reg_cache) { 98 if (!t10_pr_reg_cache) {
99 pr_err("kmem_cache_create() for struct t10_pr_registration" 99 pr_err("kmem_cache_create() for struct t10_pr_registration"
100 " failed\n"); 100 " failed\n");
101 goto out_free_ua_cache; 101 goto out_free_ua_cache;
102 } 102 }
103 t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", 103 t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache",
104 sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), 104 sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp),
105 0, NULL); 105 0, NULL);
106 if (!t10_alua_lu_gp_cache) { 106 if (!t10_alua_lu_gp_cache) {
107 pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" 107 pr_err("kmem_cache_create() for t10_alua_lu_gp_cache"
108 " failed\n"); 108 " failed\n");
109 goto out_free_pr_reg_cache; 109 goto out_free_pr_reg_cache;
110 } 110 }
111 t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", 111 t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache",
112 sizeof(struct t10_alua_lu_gp_member), 112 sizeof(struct t10_alua_lu_gp_member),
113 __alignof__(struct t10_alua_lu_gp_member), 0, NULL); 113 __alignof__(struct t10_alua_lu_gp_member), 0, NULL);
114 if (!t10_alua_lu_gp_mem_cache) { 114 if (!t10_alua_lu_gp_mem_cache) {
115 pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" 115 pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_"
116 "cache failed\n"); 116 "cache failed\n");
117 goto out_free_lu_gp_cache; 117 goto out_free_lu_gp_cache;
118 } 118 }
119 t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", 119 t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache",
120 sizeof(struct t10_alua_tg_pt_gp), 120 sizeof(struct t10_alua_tg_pt_gp),
121 __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); 121 __alignof__(struct t10_alua_tg_pt_gp), 0, NULL);
122 if (!t10_alua_tg_pt_gp_cache) { 122 if (!t10_alua_tg_pt_gp_cache) {
123 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" 123 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
124 "cache failed\n"); 124 "cache failed\n");
125 goto out_free_lu_gp_mem_cache; 125 goto out_free_lu_gp_mem_cache;
126 } 126 }
127 t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( 127 t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
128 "t10_alua_tg_pt_gp_mem_cache", 128 "t10_alua_tg_pt_gp_mem_cache",
129 sizeof(struct t10_alua_tg_pt_gp_member), 129 sizeof(struct t10_alua_tg_pt_gp_member),
130 __alignof__(struct t10_alua_tg_pt_gp_member), 130 __alignof__(struct t10_alua_tg_pt_gp_member),
131 0, NULL); 131 0, NULL);
132 if (!t10_alua_tg_pt_gp_mem_cache) { 132 if (!t10_alua_tg_pt_gp_mem_cache) {
133 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" 133 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
134 "mem_t failed\n"); 134 "mem_t failed\n");
135 goto out_free_tg_pt_gp_cache; 135 goto out_free_tg_pt_gp_cache;
136 } 136 }
137 137
138 target_completion_wq = alloc_workqueue("target_completion", 138 target_completion_wq = alloc_workqueue("target_completion",
139 WQ_MEM_RECLAIM, 0); 139 WQ_MEM_RECLAIM, 0);
140 if (!target_completion_wq) 140 if (!target_completion_wq)
141 goto out_free_tg_pt_gp_mem_cache; 141 goto out_free_tg_pt_gp_mem_cache;
142 142
143 return 0; 143 return 0;
144 144
145 out_free_tg_pt_gp_mem_cache: 145 out_free_tg_pt_gp_mem_cache:
146 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); 146 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
147 out_free_tg_pt_gp_cache: 147 out_free_tg_pt_gp_cache:
148 kmem_cache_destroy(t10_alua_tg_pt_gp_cache); 148 kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
149 out_free_lu_gp_mem_cache: 149 out_free_lu_gp_mem_cache:
150 kmem_cache_destroy(t10_alua_lu_gp_mem_cache); 150 kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
151 out_free_lu_gp_cache: 151 out_free_lu_gp_cache:
152 kmem_cache_destroy(t10_alua_lu_gp_cache); 152 kmem_cache_destroy(t10_alua_lu_gp_cache);
153 out_free_pr_reg_cache: 153 out_free_pr_reg_cache:
154 kmem_cache_destroy(t10_pr_reg_cache); 154 kmem_cache_destroy(t10_pr_reg_cache);
155 out_free_ua_cache: 155 out_free_ua_cache:
156 kmem_cache_destroy(se_ua_cache); 156 kmem_cache_destroy(se_ua_cache);
157 out_free_sess_cache: 157 out_free_sess_cache:
158 kmem_cache_destroy(se_sess_cache); 158 kmem_cache_destroy(se_sess_cache);
159 out: 159 out:
160 return -ENOMEM; 160 return -ENOMEM;
161 } 161 }
162 162
163 void release_se_kmem_caches(void) 163 void release_se_kmem_caches(void)
164 { 164 {
165 destroy_workqueue(target_completion_wq); 165 destroy_workqueue(target_completion_wq);
166 kmem_cache_destroy(se_sess_cache); 166 kmem_cache_destroy(se_sess_cache);
167 kmem_cache_destroy(se_ua_cache); 167 kmem_cache_destroy(se_ua_cache);
168 kmem_cache_destroy(t10_pr_reg_cache); 168 kmem_cache_destroy(t10_pr_reg_cache);
169 kmem_cache_destroy(t10_alua_lu_gp_cache); 169 kmem_cache_destroy(t10_alua_lu_gp_cache);
170 kmem_cache_destroy(t10_alua_lu_gp_mem_cache); 170 kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
171 kmem_cache_destroy(t10_alua_tg_pt_gp_cache); 171 kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
172 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); 172 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
173 } 173 }
174 174
175 /* This code ensures unique mib indexes are handed out. */ 175 /* This code ensures unique mib indexes are handed out. */
176 static DEFINE_SPINLOCK(scsi_mib_index_lock); 176 static DEFINE_SPINLOCK(scsi_mib_index_lock);
177 static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; 177 static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
178 178
179 /* 179 /*
180 * Allocate a new row index for the entry type specified 180 * Allocate a new row index for the entry type specified
181 */ 181 */
182 u32 scsi_get_new_index(scsi_index_t type) 182 u32 scsi_get_new_index(scsi_index_t type)
183 { 183 {
184 u32 new_index; 184 u32 new_index;
185 185
186 BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); 186 BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX));
187 187
188 spin_lock(&scsi_mib_index_lock); 188 spin_lock(&scsi_mib_index_lock);
189 new_index = ++scsi_mib_index[type]; 189 new_index = ++scsi_mib_index[type];
190 spin_unlock(&scsi_mib_index_lock); 190 spin_unlock(&scsi_mib_index_lock);
191 191
192 return new_index; 192 return new_index;
193 } 193 }
194 194
195 void transport_subsystem_check_init(void) 195 void transport_subsystem_check_init(void)
196 { 196 {
197 int ret; 197 int ret;
198 198
199 if (sub_api_initialized) 199 if (sub_api_initialized)
200 return; 200 return;
201 201
202 ret = request_module("target_core_iblock"); 202 ret = request_module("target_core_iblock");
203 if (ret != 0) 203 if (ret != 0)
204 pr_err("Unable to load target_core_iblock\n"); 204 pr_err("Unable to load target_core_iblock\n");
205 205
206 ret = request_module("target_core_file"); 206 ret = request_module("target_core_file");
207 if (ret != 0) 207 if (ret != 0)
208 pr_err("Unable to load target_core_file\n"); 208 pr_err("Unable to load target_core_file\n");
209 209
210 ret = request_module("target_core_pscsi"); 210 ret = request_module("target_core_pscsi");
211 if (ret != 0) 211 if (ret != 0)
212 pr_err("Unable to load target_core_pscsi\n"); 212 pr_err("Unable to load target_core_pscsi\n");
213 213
214 ret = request_module("target_core_stgt"); 214 ret = request_module("target_core_stgt");
215 if (ret != 0) 215 if (ret != 0)
216 pr_err("Unable to load target_core_stgt\n"); 216 pr_err("Unable to load target_core_stgt\n");
217 217
218 sub_api_initialized = 1; 218 sub_api_initialized = 1;
219 return; 219 return;
220 } 220 }
221 221
222 struct se_session *transport_init_session(void) 222 struct se_session *transport_init_session(void)
223 { 223 {
224 struct se_session *se_sess; 224 struct se_session *se_sess;
225 225
226 se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); 226 se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL);
227 if (!se_sess) { 227 if (!se_sess) {
228 pr_err("Unable to allocate struct se_session from" 228 pr_err("Unable to allocate struct se_session from"
229 " se_sess_cache\n"); 229 " se_sess_cache\n");
230 return ERR_PTR(-ENOMEM); 230 return ERR_PTR(-ENOMEM);
231 } 231 }
232 INIT_LIST_HEAD(&se_sess->sess_list); 232 INIT_LIST_HEAD(&se_sess->sess_list);
233 INIT_LIST_HEAD(&se_sess->sess_acl_list); 233 INIT_LIST_HEAD(&se_sess->sess_acl_list);
234 INIT_LIST_HEAD(&se_sess->sess_cmd_list); 234 INIT_LIST_HEAD(&se_sess->sess_cmd_list);
235 spin_lock_init(&se_sess->sess_cmd_lock); 235 spin_lock_init(&se_sess->sess_cmd_lock);
236 kref_init(&se_sess->sess_kref); 236 kref_init(&se_sess->sess_kref);
237 237
238 return se_sess; 238 return se_sess;
239 } 239 }
240 EXPORT_SYMBOL(transport_init_session); 240 EXPORT_SYMBOL(transport_init_session);
241 241
242 /* 242 /*
243 * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. 243 * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called.
244 */ 244 */
245 void __transport_register_session( 245 void __transport_register_session(
246 struct se_portal_group *se_tpg, 246 struct se_portal_group *se_tpg,
247 struct se_node_acl *se_nacl, 247 struct se_node_acl *se_nacl,
248 struct se_session *se_sess, 248 struct se_session *se_sess,
249 void *fabric_sess_ptr) 249 void *fabric_sess_ptr)
250 { 250 {
251 unsigned char buf[PR_REG_ISID_LEN]; 251 unsigned char buf[PR_REG_ISID_LEN];
252 252
253 se_sess->se_tpg = se_tpg; 253 se_sess->se_tpg = se_tpg;
254 se_sess->fabric_sess_ptr = fabric_sess_ptr; 254 se_sess->fabric_sess_ptr = fabric_sess_ptr;
255 /* 255 /*
256 * Used by struct se_node_acl's under ConfigFS to locate active se_session-t 256 * Used by struct se_node_acl's under ConfigFS to locate active se_session-t
257 * 257 *
258 * Only set for struct se_session's that will actually be moving I/O. 258 * Only set for struct se_session's that will actually be moving I/O.
259 * eg: *NOT* discovery sessions. 259 * eg: *NOT* discovery sessions.
260 */ 260 */
261 if (se_nacl) { 261 if (se_nacl) {
262 /* 262 /*
263 * If the fabric module supports an ISID based TransportID, 263 * If the fabric module supports an ISID based TransportID,
264 * save this value in binary from the fabric I_T Nexus now. 264 * save this value in binary from the fabric I_T Nexus now.
265 */ 265 */
266 if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 266 if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
267 memset(&buf[0], 0, PR_REG_ISID_LEN); 267 memset(&buf[0], 0, PR_REG_ISID_LEN);
268 se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, 268 se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess,
269 &buf[0], PR_REG_ISID_LEN); 269 &buf[0], PR_REG_ISID_LEN);
270 se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); 270 se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]);
271 } 271 }
272 kref_get(&se_nacl->acl_kref); 272 kref_get(&se_nacl->acl_kref);
273 273
274 spin_lock_irq(&se_nacl->nacl_sess_lock); 274 spin_lock_irq(&se_nacl->nacl_sess_lock);
275 /* 275 /*
276 * The se_nacl->nacl_sess pointer will be set to the 276 * The se_nacl->nacl_sess pointer will be set to the
277 * last active I_T Nexus for each struct se_node_acl. 277 * last active I_T Nexus for each struct se_node_acl.
278 */ 278 */
279 se_nacl->nacl_sess = se_sess; 279 se_nacl->nacl_sess = se_sess;
280 280
281 list_add_tail(&se_sess->sess_acl_list, 281 list_add_tail(&se_sess->sess_acl_list,
282 &se_nacl->acl_sess_list); 282 &se_nacl->acl_sess_list);
283 spin_unlock_irq(&se_nacl->nacl_sess_lock); 283 spin_unlock_irq(&se_nacl->nacl_sess_lock);
284 } 284 }
285 list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); 285 list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list);
286 286
287 pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", 287 pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
288 se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); 288 se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr);
289 } 289 }
290 EXPORT_SYMBOL(__transport_register_session); 290 EXPORT_SYMBOL(__transport_register_session);
291 291
292 void transport_register_session( 292 void transport_register_session(
293 struct se_portal_group *se_tpg, 293 struct se_portal_group *se_tpg,
294 struct se_node_acl *se_nacl, 294 struct se_node_acl *se_nacl,
295 struct se_session *se_sess, 295 struct se_session *se_sess,
296 void *fabric_sess_ptr) 296 void *fabric_sess_ptr)
297 { 297 {
298 unsigned long flags; 298 unsigned long flags;
299 299
300 spin_lock_irqsave(&se_tpg->session_lock, flags); 300 spin_lock_irqsave(&se_tpg->session_lock, flags);
301 __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); 301 __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr);
302 spin_unlock_irqrestore(&se_tpg->session_lock, flags); 302 spin_unlock_irqrestore(&se_tpg->session_lock, flags);
303 } 303 }
304 EXPORT_SYMBOL(transport_register_session); 304 EXPORT_SYMBOL(transport_register_session);
305 305
306 void target_release_session(struct kref *kref) 306 void target_release_session(struct kref *kref)
307 { 307 {
308 struct se_session *se_sess = container_of(kref, 308 struct se_session *se_sess = container_of(kref,
309 struct se_session, sess_kref); 309 struct se_session, sess_kref);
310 struct se_portal_group *se_tpg = se_sess->se_tpg; 310 struct se_portal_group *se_tpg = se_sess->se_tpg;
311 311
312 se_tpg->se_tpg_tfo->close_session(se_sess); 312 se_tpg->se_tpg_tfo->close_session(se_sess);
313 } 313 }
314 314
315 void target_get_session(struct se_session *se_sess) 315 void target_get_session(struct se_session *se_sess)
316 { 316 {
317 kref_get(&se_sess->sess_kref); 317 kref_get(&se_sess->sess_kref);
318 } 318 }
319 EXPORT_SYMBOL(target_get_session); 319 EXPORT_SYMBOL(target_get_session);
320 320
321 void target_put_session(struct se_session *se_sess) 321 void target_put_session(struct se_session *se_sess)
322 { 322 {
323 struct se_portal_group *tpg = se_sess->se_tpg; 323 struct se_portal_group *tpg = se_sess->se_tpg;
324 324
325 if (tpg->se_tpg_tfo->put_session != NULL) { 325 if (tpg->se_tpg_tfo->put_session != NULL) {
326 tpg->se_tpg_tfo->put_session(se_sess); 326 tpg->se_tpg_tfo->put_session(se_sess);
327 return; 327 return;
328 } 328 }
329 kref_put(&se_sess->sess_kref, target_release_session); 329 kref_put(&se_sess->sess_kref, target_release_session);
330 } 330 }
331 EXPORT_SYMBOL(target_put_session); 331 EXPORT_SYMBOL(target_put_session);
332 332
333 static void target_complete_nacl(struct kref *kref) 333 static void target_complete_nacl(struct kref *kref)
334 { 334 {
335 struct se_node_acl *nacl = container_of(kref, 335 struct se_node_acl *nacl = container_of(kref,
336 struct se_node_acl, acl_kref); 336 struct se_node_acl, acl_kref);
337 337
338 complete(&nacl->acl_free_comp); 338 complete(&nacl->acl_free_comp);
339 } 339 }
340 340
341 void target_put_nacl(struct se_node_acl *nacl) 341 void target_put_nacl(struct se_node_acl *nacl)
342 { 342 {
343 kref_put(&nacl->acl_kref, target_complete_nacl); 343 kref_put(&nacl->acl_kref, target_complete_nacl);
344 } 344 }
345 345
346 void transport_deregister_session_configfs(struct se_session *se_sess) 346 void transport_deregister_session_configfs(struct se_session *se_sess)
347 { 347 {
348 struct se_node_acl *se_nacl; 348 struct se_node_acl *se_nacl;
349 unsigned long flags; 349 unsigned long flags;
350 /* 350 /*
351 * Used by struct se_node_acl's under ConfigFS to locate active struct se_session 351 * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
352 */ 352 */
353 se_nacl = se_sess->se_node_acl; 353 se_nacl = se_sess->se_node_acl;
354 if (se_nacl) { 354 if (se_nacl) {
355 spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); 355 spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags);
356 if (se_nacl->acl_stop == 0) 356 if (se_nacl->acl_stop == 0)
357 list_del(&se_sess->sess_acl_list); 357 list_del(&se_sess->sess_acl_list);
358 /* 358 /*
359 * If the session list is empty, then clear the pointer. 359 * If the session list is empty, then clear the pointer.
360 * Otherwise, set the struct se_session pointer from the tail 360 * Otherwise, set the struct se_session pointer from the tail
361 * element of the per struct se_node_acl active session list. 361 * element of the per struct se_node_acl active session list.
362 */ 362 */
363 if (list_empty(&se_nacl->acl_sess_list)) 363 if (list_empty(&se_nacl->acl_sess_list))
364 se_nacl->nacl_sess = NULL; 364 se_nacl->nacl_sess = NULL;
365 else { 365 else {
366 se_nacl->nacl_sess = container_of( 366 se_nacl->nacl_sess = container_of(
367 se_nacl->acl_sess_list.prev, 367 se_nacl->acl_sess_list.prev,
368 struct se_session, sess_acl_list); 368 struct se_session, sess_acl_list);
369 } 369 }
370 spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); 370 spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags);
371 } 371 }
372 } 372 }
373 EXPORT_SYMBOL(transport_deregister_session_configfs); 373 EXPORT_SYMBOL(transport_deregister_session_configfs);
374 374
375 void transport_free_session(struct se_session *se_sess) 375 void transport_free_session(struct se_session *se_sess)
376 { 376 {
377 kmem_cache_free(se_sess_cache, se_sess); 377 kmem_cache_free(se_sess_cache, se_sess);
378 } 378 }
379 EXPORT_SYMBOL(transport_free_session); 379 EXPORT_SYMBOL(transport_free_session);
380 380
381 void transport_deregister_session(struct se_session *se_sess) 381 void transport_deregister_session(struct se_session *se_sess)
382 { 382 {
383 struct se_portal_group *se_tpg = se_sess->se_tpg; 383 struct se_portal_group *se_tpg = se_sess->se_tpg;
384 struct target_core_fabric_ops *se_tfo; 384 struct target_core_fabric_ops *se_tfo;
385 struct se_node_acl *se_nacl; 385 struct se_node_acl *se_nacl;
386 unsigned long flags; 386 unsigned long flags;
387 bool comp_nacl = true; 387 bool comp_nacl = true;
388 388
389 if (!se_tpg) { 389 if (!se_tpg) {
390 transport_free_session(se_sess); 390 transport_free_session(se_sess);
391 return; 391 return;
392 } 392 }
393 se_tfo = se_tpg->se_tpg_tfo; 393 se_tfo = se_tpg->se_tpg_tfo;
394 394
395 spin_lock_irqsave(&se_tpg->session_lock, flags); 395 spin_lock_irqsave(&se_tpg->session_lock, flags);
396 list_del(&se_sess->sess_list); 396 list_del(&se_sess->sess_list);
397 se_sess->se_tpg = NULL; 397 se_sess->se_tpg = NULL;
398 se_sess->fabric_sess_ptr = NULL; 398 se_sess->fabric_sess_ptr = NULL;
399 spin_unlock_irqrestore(&se_tpg->session_lock, flags); 399 spin_unlock_irqrestore(&se_tpg->session_lock, flags);
400 400
401 /* 401 /*
402 * Determine if we need to do extra work for this initiator node's 402 * Determine if we need to do extra work for this initiator node's
403 * struct se_node_acl if it had been previously dynamically generated. 403 * struct se_node_acl if it had been previously dynamically generated.
404 */ 404 */
405 se_nacl = se_sess->se_node_acl; 405 se_nacl = se_sess->se_node_acl;
406 406
407 spin_lock_irqsave(&se_tpg->acl_node_lock, flags); 407 spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
408 if (se_nacl && se_nacl->dynamic_node_acl) { 408 if (se_nacl && se_nacl->dynamic_node_acl) {
409 if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { 409 if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) {
410 list_del(&se_nacl->acl_list); 410 list_del(&se_nacl->acl_list);
411 se_tpg->num_node_acls--; 411 se_tpg->num_node_acls--;
412 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); 412 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
413 core_tpg_wait_for_nacl_pr_ref(se_nacl); 413 core_tpg_wait_for_nacl_pr_ref(se_nacl);
414 core_free_device_list_for_node(se_nacl, se_tpg); 414 core_free_device_list_for_node(se_nacl, se_tpg);
415 se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); 415 se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl);
416 416
417 comp_nacl = false; 417 comp_nacl = false;
418 spin_lock_irqsave(&se_tpg->acl_node_lock, flags); 418 spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
419 } 419 }
420 } 420 }
421 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); 421 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
422 422
423 pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", 423 pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n",
424 se_tpg->se_tpg_tfo->get_fabric_name()); 424 se_tpg->se_tpg_tfo->get_fabric_name());
425 /* 425 /*
426 * If last kref is dropping now for an explict NodeACL, awake sleeping 426 * If last kref is dropping now for an explict NodeACL, awake sleeping
427 * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group 427 * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group
428 * removal context. 428 * removal context.
429 */ 429 */
430 if (se_nacl && comp_nacl == true) 430 if (se_nacl && comp_nacl == true)
431 target_put_nacl(se_nacl); 431 target_put_nacl(se_nacl);
432 432
433 transport_free_session(se_sess); 433 transport_free_session(se_sess);
434 } 434 }
435 EXPORT_SYMBOL(transport_deregister_session); 435 EXPORT_SYMBOL(transport_deregister_session);
436 436
437 /* 437 /*
438 * Called with cmd->t_state_lock held. 438 * Called with cmd->t_state_lock held.
439 */ 439 */
440 static void target_remove_from_state_list(struct se_cmd *cmd) 440 static void target_remove_from_state_list(struct se_cmd *cmd)
441 { 441 {
442 struct se_device *dev = cmd->se_dev; 442 struct se_device *dev = cmd->se_dev;
443 unsigned long flags; 443 unsigned long flags;
444 444
445 if (!dev) 445 if (!dev)
446 return; 446 return;
447 447
448 if (cmd->transport_state & CMD_T_BUSY) 448 if (cmd->transport_state & CMD_T_BUSY)
449 return; 449 return;
450 450
451 spin_lock_irqsave(&dev->execute_task_lock, flags); 451 spin_lock_irqsave(&dev->execute_task_lock, flags);
452 if (cmd->state_active) { 452 if (cmd->state_active) {
453 list_del(&cmd->state_list); 453 list_del(&cmd->state_list);
454 cmd->state_active = false; 454 cmd->state_active = false;
455 } 455 }
456 spin_unlock_irqrestore(&dev->execute_task_lock, flags); 456 spin_unlock_irqrestore(&dev->execute_task_lock, flags);
457 } 457 }
458 458
459 static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists) 459 static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists)
460 { 460 {
461 unsigned long flags; 461 unsigned long flags;
462 462
463 spin_lock_irqsave(&cmd->t_state_lock, flags); 463 spin_lock_irqsave(&cmd->t_state_lock, flags);
464 /* 464 /*
465 * Determine if IOCTL context caller in requesting the stopping of this 465 * Determine if IOCTL context caller in requesting the stopping of this
466 * command for LUN shutdown purposes. 466 * command for LUN shutdown purposes.
467 */ 467 */
468 if (cmd->transport_state & CMD_T_LUN_STOP) { 468 if (cmd->transport_state & CMD_T_LUN_STOP) {
469 pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", 469 pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
470 __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); 470 __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
471 471
472 cmd->transport_state &= ~CMD_T_ACTIVE; 472 cmd->transport_state &= ~CMD_T_ACTIVE;
473 if (remove_from_lists) 473 if (remove_from_lists)
474 target_remove_from_state_list(cmd); 474 target_remove_from_state_list(cmd);
475 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 475 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
476 476
477 complete(&cmd->transport_lun_stop_comp); 477 complete(&cmd->transport_lun_stop_comp);
478 return 1; 478 return 1;
479 } 479 }
480 480
481 if (remove_from_lists) { 481 if (remove_from_lists) {
482 target_remove_from_state_list(cmd); 482 target_remove_from_state_list(cmd);
483 483
484 /* 484 /*
485 * Clear struct se_cmd->se_lun before the handoff to FE. 485 * Clear struct se_cmd->se_lun before the handoff to FE.
486 */ 486 */
487 cmd->se_lun = NULL; 487 cmd->se_lun = NULL;
488 } 488 }
489 489
490 /* 490 /*
491 * Determine if frontend context caller is requesting the stopping of 491 * Determine if frontend context caller is requesting the stopping of
492 * this command for frontend exceptions. 492 * this command for frontend exceptions.
493 */ 493 */
494 if (cmd->transport_state & CMD_T_STOP) { 494 if (cmd->transport_state & CMD_T_STOP) {
495 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", 495 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
496 __func__, __LINE__, 496 __func__, __LINE__,
497 cmd->se_tfo->get_task_tag(cmd)); 497 cmd->se_tfo->get_task_tag(cmd));
498 498
499 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 499 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
500 500
501 complete(&cmd->t_transport_stop_comp); 501 complete(&cmd->t_transport_stop_comp);
502 return 1; 502 return 1;
503 } 503 }
504 504
505 cmd->transport_state &= ~CMD_T_ACTIVE; 505 cmd->transport_state &= ~CMD_T_ACTIVE;
506 if (remove_from_lists) { 506 if (remove_from_lists) {
507 /* 507 /*
508 * Some fabric modules like tcm_loop can release 508 * Some fabric modules like tcm_loop can release
509 * their internally allocated I/O reference now and 509 * their internally allocated I/O reference now and
510 * struct se_cmd now. 510 * struct se_cmd now.
511 * 511 *
512 * Fabric modules are expected to return '1' here if the 512 * Fabric modules are expected to return '1' here if the
513 * se_cmd being passed is released at this point, 513 * se_cmd being passed is released at this point,
514 * or zero if not being released. 514 * or zero if not being released.
515 */ 515 */
516 if (cmd->se_tfo->check_stop_free != NULL) { 516 if (cmd->se_tfo->check_stop_free != NULL) {
517 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 517 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
518 return cmd->se_tfo->check_stop_free(cmd); 518 return cmd->se_tfo->check_stop_free(cmd);
519 } 519 }
520 } 520 }
521 521
522 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 522 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
523 return 0; 523 return 0;
524 } 524 }
525 525
526 static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) 526 static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd)
527 { 527 {
528 return transport_cmd_check_stop(cmd, true); 528 return transport_cmd_check_stop(cmd, true);
529 } 529 }
530 530
531 static void transport_lun_remove_cmd(struct se_cmd *cmd) 531 static void transport_lun_remove_cmd(struct se_cmd *cmd)
532 { 532 {
533 struct se_lun *lun = cmd->se_lun; 533 struct se_lun *lun = cmd->se_lun;
534 unsigned long flags; 534 unsigned long flags;
535 535
536 if (!lun) 536 if (!lun)
537 return; 537 return;
538 538
539 spin_lock_irqsave(&cmd->t_state_lock, flags); 539 spin_lock_irqsave(&cmd->t_state_lock, flags);
540 if (cmd->transport_state & CMD_T_DEV_ACTIVE) { 540 if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
541 cmd->transport_state &= ~CMD_T_DEV_ACTIVE; 541 cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
542 target_remove_from_state_list(cmd); 542 target_remove_from_state_list(cmd);
543 } 543 }
544 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 544 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
545 545
546 spin_lock_irqsave(&lun->lun_cmd_lock, flags); 546 spin_lock_irqsave(&lun->lun_cmd_lock, flags);
547 if (!list_empty(&cmd->se_lun_node)) 547 if (!list_empty(&cmd->se_lun_node))
548 list_del_init(&cmd->se_lun_node); 548 list_del_init(&cmd->se_lun_node);
549 spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); 549 spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
550 } 550 }
551 551
552 void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) 552 void transport_cmd_finish_abort(struct se_cmd *cmd, int remove)
553 { 553 {
554 if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) 554 if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
555 transport_lun_remove_cmd(cmd); 555 transport_lun_remove_cmd(cmd);
556 556
557 if (transport_cmd_check_stop_to_fabric(cmd)) 557 if (transport_cmd_check_stop_to_fabric(cmd))
558 return; 558 return;
559 if (remove) 559 if (remove)
560 transport_put_cmd(cmd); 560 transport_put_cmd(cmd);
561 } 561 }
562 562
563 static void target_complete_failure_work(struct work_struct *work) 563 static void target_complete_failure_work(struct work_struct *work)
564 { 564 {
565 struct se_cmd *cmd = container_of(work, struct se_cmd, work); 565 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
566 566
567 transport_generic_request_failure(cmd); 567 transport_generic_request_failure(cmd);
568 } 568 }
569 569
570 /* 570 /*
571 * Used when asking transport to copy Sense Data from the underlying 571 * Used when asking transport to copy Sense Data from the underlying
572 * Linux/SCSI struct scsi_cmnd 572 * Linux/SCSI struct scsi_cmnd
573 */ 573 */
574 static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) 574 static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd)
575 { 575 {
576 unsigned char *buffer = cmd->sense_buffer; 576 unsigned char *buffer = cmd->sense_buffer;
577 struct se_device *dev = cmd->se_dev; 577 struct se_device *dev = cmd->se_dev;
578 u32 offset = 0; 578 u32 offset = 0;
579 579
580 WARN_ON(!cmd->se_lun); 580 WARN_ON(!cmd->se_lun);
581 581
582 if (!dev) 582 if (!dev)
583 return NULL; 583 return NULL;
584 584
585 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) 585 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION)
586 return NULL; 586 return NULL;
587 587
588 offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER); 588 offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER);
589 589
590 /* Automatically padded */ 590 /* Automatically padded */
591 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; 591 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
592 592
593 pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", 593 pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n",
594 dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); 594 dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status);
595 return &buffer[offset]; 595 return &buffer[offset];
596 } 596 }
597 597
598 void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) 598 void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
599 { 599 {
600 struct se_device *dev = cmd->se_dev; 600 struct se_device *dev = cmd->se_dev;
601 int success = scsi_status == GOOD; 601 int success = scsi_status == GOOD;
602 unsigned long flags; 602 unsigned long flags;
603 603
604 cmd->scsi_status = scsi_status; 604 cmd->scsi_status = scsi_status;
605 605
606 606
607 spin_lock_irqsave(&cmd->t_state_lock, flags); 607 spin_lock_irqsave(&cmd->t_state_lock, flags);
608 cmd->transport_state &= ~CMD_T_BUSY; 608 cmd->transport_state &= ~CMD_T_BUSY;
609 609
610 if (dev && dev->transport->transport_complete) { 610 if (dev && dev->transport->transport_complete) {
611 dev->transport->transport_complete(cmd, 611 dev->transport->transport_complete(cmd,
612 cmd->t_data_sg, 612 cmd->t_data_sg,
613 transport_get_sense_buffer(cmd)); 613 transport_get_sense_buffer(cmd));
614 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) 614 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)
615 success = 1; 615 success = 1;
616 } 616 }
617 617
618 /* 618 /*
619 * See if we are waiting to complete for an exception condition. 619 * See if we are waiting to complete for an exception condition.
620 */ 620 */
621 if (cmd->transport_state & CMD_T_REQUEST_STOP) { 621 if (cmd->transport_state & CMD_T_REQUEST_STOP) {
622 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 622 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
623 complete(&cmd->task_stop_comp); 623 complete(&cmd->task_stop_comp);
624 return; 624 return;
625 } 625 }
626 626
627 if (!success) 627 if (!success)
628 cmd->transport_state |= CMD_T_FAILED; 628 cmd->transport_state |= CMD_T_FAILED;
629 629
630 /* 630 /*
631 * Check for case where an explict ABORT_TASK has been received 631 * Check for case where an explict ABORT_TASK has been received
632 * and transport_wait_for_tasks() will be waiting for completion.. 632 * and transport_wait_for_tasks() will be waiting for completion..
633 */ 633 */
634 if (cmd->transport_state & CMD_T_ABORTED && 634 if (cmd->transport_state & CMD_T_ABORTED &&
635 cmd->transport_state & CMD_T_STOP) { 635 cmd->transport_state & CMD_T_STOP) {
636 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 636 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
637 complete(&cmd->t_transport_stop_comp); 637 complete(&cmd->t_transport_stop_comp);
638 return; 638 return;
639 } else if (cmd->transport_state & CMD_T_FAILED) { 639 } else if (cmd->transport_state & CMD_T_FAILED) {
640 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 640 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
641 INIT_WORK(&cmd->work, target_complete_failure_work); 641 INIT_WORK(&cmd->work, target_complete_failure_work);
642 } else { 642 } else {
643 INIT_WORK(&cmd->work, target_complete_ok_work); 643 INIT_WORK(&cmd->work, target_complete_ok_work);
644 } 644 }
645 645
646 cmd->t_state = TRANSPORT_COMPLETE; 646 cmd->t_state = TRANSPORT_COMPLETE;
647 cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); 647 cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE);
648 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 648 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
649 649
650 queue_work(target_completion_wq, &cmd->work); 650 queue_work(target_completion_wq, &cmd->work);
651 } 651 }
652 EXPORT_SYMBOL(target_complete_cmd); 652 EXPORT_SYMBOL(target_complete_cmd);
653 653
654 static void target_add_to_state_list(struct se_cmd *cmd) 654 static void target_add_to_state_list(struct se_cmd *cmd)
655 { 655 {
656 struct se_device *dev = cmd->se_dev; 656 struct se_device *dev = cmd->se_dev;
657 unsigned long flags; 657 unsigned long flags;
658 658
659 spin_lock_irqsave(&dev->execute_task_lock, flags); 659 spin_lock_irqsave(&dev->execute_task_lock, flags);
660 if (!cmd->state_active) { 660 if (!cmd->state_active) {
661 list_add_tail(&cmd->state_list, &dev->state_list); 661 list_add_tail(&cmd->state_list, &dev->state_list);
662 cmd->state_active = true; 662 cmd->state_active = true;
663 } 663 }
664 spin_unlock_irqrestore(&dev->execute_task_lock, flags); 664 spin_unlock_irqrestore(&dev->execute_task_lock, flags);
665 } 665 }
666 666
667 /* 667 /*
668 * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status 668 * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status
669 */ 669 */
670 static void transport_write_pending_qf(struct se_cmd *cmd); 670 static void transport_write_pending_qf(struct se_cmd *cmd);
671 static void transport_complete_qf(struct se_cmd *cmd); 671 static void transport_complete_qf(struct se_cmd *cmd);
672 672
673 static void target_qf_do_work(struct work_struct *work) 673 static void target_qf_do_work(struct work_struct *work)
674 { 674 {
675 struct se_device *dev = container_of(work, struct se_device, 675 struct se_device *dev = container_of(work, struct se_device,
676 qf_work_queue); 676 qf_work_queue);
677 LIST_HEAD(qf_cmd_list); 677 LIST_HEAD(qf_cmd_list);
678 struct se_cmd *cmd, *cmd_tmp; 678 struct se_cmd *cmd, *cmd_tmp;
679 679
680 spin_lock_irq(&dev->qf_cmd_lock); 680 spin_lock_irq(&dev->qf_cmd_lock);
681 list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); 681 list_splice_init(&dev->qf_cmd_list, &qf_cmd_list);
682 spin_unlock_irq(&dev->qf_cmd_lock); 682 spin_unlock_irq(&dev->qf_cmd_lock);
683 683
684 list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { 684 list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) {
685 list_del(&cmd->se_qf_node); 685 list_del(&cmd->se_qf_node);
686 atomic_dec(&dev->dev_qf_count); 686 atomic_dec(&dev->dev_qf_count);
687 smp_mb__after_atomic_dec(); 687 smp_mb__after_atomic_dec();
688 688
689 pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" 689 pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue"
690 " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, 690 " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd,
691 (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : 691 (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" :
692 (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" 692 (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING"
693 : "UNKNOWN"); 693 : "UNKNOWN");
694 694
695 if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) 695 if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP)
696 transport_write_pending_qf(cmd); 696 transport_write_pending_qf(cmd);
697 else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) 697 else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK)
698 transport_complete_qf(cmd); 698 transport_complete_qf(cmd);
699 } 699 }
700 } 700 }
701 701
702 unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) 702 unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd)
703 { 703 {
704 switch (cmd->data_direction) { 704 switch (cmd->data_direction) {
705 case DMA_NONE: 705 case DMA_NONE:
706 return "NONE"; 706 return "NONE";
707 case DMA_FROM_DEVICE: 707 case DMA_FROM_DEVICE:
708 return "READ"; 708 return "READ";
709 case DMA_TO_DEVICE: 709 case DMA_TO_DEVICE:
710 return "WRITE"; 710 return "WRITE";
711 case DMA_BIDIRECTIONAL: 711 case DMA_BIDIRECTIONAL:
712 return "BIDI"; 712 return "BIDI";
713 default: 713 default:
714 break; 714 break;
715 } 715 }
716 716
717 return "UNKNOWN"; 717 return "UNKNOWN";
718 } 718 }
719 719
720 void transport_dump_dev_state( 720 void transport_dump_dev_state(
721 struct se_device *dev, 721 struct se_device *dev,
722 char *b, 722 char *b,
723 int *bl) 723 int *bl)
724 { 724 {
725 *bl += sprintf(b + *bl, "Status: "); 725 *bl += sprintf(b + *bl, "Status: ");
726 switch (dev->dev_status) { 726 switch (dev->dev_status) {
727 case TRANSPORT_DEVICE_ACTIVATED: 727 case TRANSPORT_DEVICE_ACTIVATED:
728 *bl += sprintf(b + *bl, "ACTIVATED"); 728 *bl += sprintf(b + *bl, "ACTIVATED");
729 break; 729 break;
730 case TRANSPORT_DEVICE_DEACTIVATED: 730 case TRANSPORT_DEVICE_DEACTIVATED:
731 *bl += sprintf(b + *bl, "DEACTIVATED"); 731 *bl += sprintf(b + *bl, "DEACTIVATED");
732 break; 732 break;
733 case TRANSPORT_DEVICE_SHUTDOWN: 733 case TRANSPORT_DEVICE_SHUTDOWN:
734 *bl += sprintf(b + *bl, "SHUTDOWN"); 734 *bl += sprintf(b + *bl, "SHUTDOWN");
735 break; 735 break;
736 case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: 736 case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
737 case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: 737 case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
738 *bl += sprintf(b + *bl, "OFFLINE"); 738 *bl += sprintf(b + *bl, "OFFLINE");
739 break; 739 break;
740 default: 740 default:
741 *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); 741 *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status);
742 break; 742 break;
743 } 743 }
744 744
745 *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); 745 *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth);
746 *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", 746 *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n",
747 dev->se_sub_dev->se_dev_attrib.block_size, 747 dev->se_sub_dev->se_dev_attrib.block_size,
748 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 748 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
749 *bl += sprintf(b + *bl, " "); 749 *bl += sprintf(b + *bl, " ");
750 } 750 }
751 751
752 void transport_dump_vpd_proto_id( 752 void transport_dump_vpd_proto_id(
753 struct t10_vpd *vpd, 753 struct t10_vpd *vpd,
754 unsigned char *p_buf, 754 unsigned char *p_buf,
755 int p_buf_len) 755 int p_buf_len)
756 { 756 {
757 unsigned char buf[VPD_TMP_BUF_SIZE]; 757 unsigned char buf[VPD_TMP_BUF_SIZE];
758 int len; 758 int len;
759 759
760 memset(buf, 0, VPD_TMP_BUF_SIZE); 760 memset(buf, 0, VPD_TMP_BUF_SIZE);
761 len = sprintf(buf, "T10 VPD Protocol Identifier: "); 761 len = sprintf(buf, "T10 VPD Protocol Identifier: ");
762 762
763 switch (vpd->protocol_identifier) { 763 switch (vpd->protocol_identifier) {
764 case 0x00: 764 case 0x00:
765 sprintf(buf+len, "Fibre Channel\n"); 765 sprintf(buf+len, "Fibre Channel\n");
766 break; 766 break;
767 case 0x10: 767 case 0x10:
768 sprintf(buf+len, "Parallel SCSI\n"); 768 sprintf(buf+len, "Parallel SCSI\n");
769 break; 769 break;
770 case 0x20: 770 case 0x20:
771 sprintf(buf+len, "SSA\n"); 771 sprintf(buf+len, "SSA\n");
772 break; 772 break;
773 case 0x30: 773 case 0x30:
774 sprintf(buf+len, "IEEE 1394\n"); 774 sprintf(buf+len, "IEEE 1394\n");
775 break; 775 break;
776 case 0x40: 776 case 0x40:
777 sprintf(buf+len, "SCSI Remote Direct Memory Access" 777 sprintf(buf+len, "SCSI Remote Direct Memory Access"
778 " Protocol\n"); 778 " Protocol\n");
779 break; 779 break;
780 case 0x50: 780 case 0x50:
781 sprintf(buf+len, "Internet SCSI (iSCSI)\n"); 781 sprintf(buf+len, "Internet SCSI (iSCSI)\n");
782 break; 782 break;
783 case 0x60: 783 case 0x60:
784 sprintf(buf+len, "SAS Serial SCSI Protocol\n"); 784 sprintf(buf+len, "SAS Serial SCSI Protocol\n");
785 break; 785 break;
786 case 0x70: 786 case 0x70:
787 sprintf(buf+len, "Automation/Drive Interface Transport" 787 sprintf(buf+len, "Automation/Drive Interface Transport"
788 " Protocol\n"); 788 " Protocol\n");
789 break; 789 break;
790 case 0x80: 790 case 0x80:
791 sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); 791 sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n");
792 break; 792 break;
793 default: 793 default:
794 sprintf(buf+len, "Unknown 0x%02x\n", 794 sprintf(buf+len, "Unknown 0x%02x\n",
795 vpd->protocol_identifier); 795 vpd->protocol_identifier);
796 break; 796 break;
797 } 797 }
798 798
799 if (p_buf) 799 if (p_buf)
800 strncpy(p_buf, buf, p_buf_len); 800 strncpy(p_buf, buf, p_buf_len);
801 else 801 else
802 pr_debug("%s", buf); 802 pr_debug("%s", buf);
803 } 803 }
804 804
805 void 805 void
806 transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) 806 transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83)
807 { 807 {
808 /* 808 /*
809 * Check if the Protocol Identifier Valid (PIV) bit is set.. 809 * Check if the Protocol Identifier Valid (PIV) bit is set..
810 * 810 *
811 * from spc3r23.pdf section 7.5.1 811 * from spc3r23.pdf section 7.5.1
812 */ 812 */
813 if (page_83[1] & 0x80) { 813 if (page_83[1] & 0x80) {
814 vpd->protocol_identifier = (page_83[0] & 0xf0); 814 vpd->protocol_identifier = (page_83[0] & 0xf0);
815 vpd->protocol_identifier_set = 1; 815 vpd->protocol_identifier_set = 1;
816 transport_dump_vpd_proto_id(vpd, NULL, 0); 816 transport_dump_vpd_proto_id(vpd, NULL, 0);
817 } 817 }
818 } 818 }
819 EXPORT_SYMBOL(transport_set_vpd_proto_id); 819 EXPORT_SYMBOL(transport_set_vpd_proto_id);
820 820
821 int transport_dump_vpd_assoc( 821 int transport_dump_vpd_assoc(
822 struct t10_vpd *vpd, 822 struct t10_vpd *vpd,
823 unsigned char *p_buf, 823 unsigned char *p_buf,
824 int p_buf_len) 824 int p_buf_len)
825 { 825 {
826 unsigned char buf[VPD_TMP_BUF_SIZE]; 826 unsigned char buf[VPD_TMP_BUF_SIZE];
827 int ret = 0; 827 int ret = 0;
828 int len; 828 int len;
829 829
830 memset(buf, 0, VPD_TMP_BUF_SIZE); 830 memset(buf, 0, VPD_TMP_BUF_SIZE);
831 len = sprintf(buf, "T10 VPD Identifier Association: "); 831 len = sprintf(buf, "T10 VPD Identifier Association: ");
832 832
833 switch (vpd->association) { 833 switch (vpd->association) {
834 case 0x00: 834 case 0x00:
835 sprintf(buf+len, "addressed logical unit\n"); 835 sprintf(buf+len, "addressed logical unit\n");
836 break; 836 break;
837 case 0x10: 837 case 0x10:
838 sprintf(buf+len, "target port\n"); 838 sprintf(buf+len, "target port\n");
839 break; 839 break;
840 case 0x20: 840 case 0x20:
841 sprintf(buf+len, "SCSI target device\n"); 841 sprintf(buf+len, "SCSI target device\n");
842 break; 842 break;
843 default: 843 default:
844 sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); 844 sprintf(buf+len, "Unknown 0x%02x\n", vpd->association);
845 ret = -EINVAL; 845 ret = -EINVAL;
846 break; 846 break;
847 } 847 }
848 848
849 if (p_buf) 849 if (p_buf)
850 strncpy(p_buf, buf, p_buf_len); 850 strncpy(p_buf, buf, p_buf_len);
851 else 851 else
852 pr_debug("%s", buf); 852 pr_debug("%s", buf);
853 853
854 return ret; 854 return ret;
855 } 855 }
856 856
857 int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) 857 int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83)
858 { 858 {
859 /* 859 /*
860 * The VPD identification association.. 860 * The VPD identification association..
861 * 861 *
862 * from spc3r23.pdf Section 7.6.3.1 Table 297 862 * from spc3r23.pdf Section 7.6.3.1 Table 297
863 */ 863 */
864 vpd->association = (page_83[1] & 0x30); 864 vpd->association = (page_83[1] & 0x30);
865 return transport_dump_vpd_assoc(vpd, NULL, 0); 865 return transport_dump_vpd_assoc(vpd, NULL, 0);
866 } 866 }
867 EXPORT_SYMBOL(transport_set_vpd_assoc); 867 EXPORT_SYMBOL(transport_set_vpd_assoc);
868 868
869 int transport_dump_vpd_ident_type( 869 int transport_dump_vpd_ident_type(
870 struct t10_vpd *vpd, 870 struct t10_vpd *vpd,
871 unsigned char *p_buf, 871 unsigned char *p_buf,
872 int p_buf_len) 872 int p_buf_len)
873 { 873 {
874 unsigned char buf[VPD_TMP_BUF_SIZE]; 874 unsigned char buf[VPD_TMP_BUF_SIZE];
875 int ret = 0; 875 int ret = 0;
876 int len; 876 int len;
877 877
878 memset(buf, 0, VPD_TMP_BUF_SIZE); 878 memset(buf, 0, VPD_TMP_BUF_SIZE);
879 len = sprintf(buf, "T10 VPD Identifier Type: "); 879 len = sprintf(buf, "T10 VPD Identifier Type: ");
880 880
881 switch (vpd->device_identifier_type) { 881 switch (vpd->device_identifier_type) {
882 case 0x00: 882 case 0x00:
883 sprintf(buf+len, "Vendor specific\n"); 883 sprintf(buf+len, "Vendor specific\n");
884 break; 884 break;
885 case 0x01: 885 case 0x01:
886 sprintf(buf+len, "T10 Vendor ID based\n"); 886 sprintf(buf+len, "T10 Vendor ID based\n");
887 break; 887 break;
888 case 0x02: 888 case 0x02:
889 sprintf(buf+len, "EUI-64 based\n"); 889 sprintf(buf+len, "EUI-64 based\n");
890 break; 890 break;
891 case 0x03: 891 case 0x03:
892 sprintf(buf+len, "NAA\n"); 892 sprintf(buf+len, "NAA\n");
893 break; 893 break;
894 case 0x04: 894 case 0x04:
895 sprintf(buf+len, "Relative target port identifier\n"); 895 sprintf(buf+len, "Relative target port identifier\n");
896 break; 896 break;
897 case 0x08: 897 case 0x08:
898 sprintf(buf+len, "SCSI name string\n"); 898 sprintf(buf+len, "SCSI name string\n");
899 break; 899 break;
900 default: 900 default:
901 sprintf(buf+len, "Unsupported: 0x%02x\n", 901 sprintf(buf+len, "Unsupported: 0x%02x\n",
902 vpd->device_identifier_type); 902 vpd->device_identifier_type);
903 ret = -EINVAL; 903 ret = -EINVAL;
904 break; 904 break;
905 } 905 }
906 906
907 if (p_buf) { 907 if (p_buf) {
908 if (p_buf_len < strlen(buf)+1) 908 if (p_buf_len < strlen(buf)+1)
909 return -EINVAL; 909 return -EINVAL;
910 strncpy(p_buf, buf, p_buf_len); 910 strncpy(p_buf, buf, p_buf_len);
911 } else { 911 } else {
912 pr_debug("%s", buf); 912 pr_debug("%s", buf);
913 } 913 }
914 914
915 return ret; 915 return ret;
916 } 916 }
917 917
918 int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) 918 int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83)
919 { 919 {
920 /* 920 /*
921 * The VPD identifier type.. 921 * The VPD identifier type..
922 * 922 *
923 * from spc3r23.pdf Section 7.6.3.1 Table 298 923 * from spc3r23.pdf Section 7.6.3.1 Table 298
924 */ 924 */
925 vpd->device_identifier_type = (page_83[1] & 0x0f); 925 vpd->device_identifier_type = (page_83[1] & 0x0f);
926 return transport_dump_vpd_ident_type(vpd, NULL, 0); 926 return transport_dump_vpd_ident_type(vpd, NULL, 0);
927 } 927 }
928 EXPORT_SYMBOL(transport_set_vpd_ident_type); 928 EXPORT_SYMBOL(transport_set_vpd_ident_type);
929 929
930 int transport_dump_vpd_ident( 930 int transport_dump_vpd_ident(
931 struct t10_vpd *vpd, 931 struct t10_vpd *vpd,
932 unsigned char *p_buf, 932 unsigned char *p_buf,
933 int p_buf_len) 933 int p_buf_len)
934 { 934 {
935 unsigned char buf[VPD_TMP_BUF_SIZE]; 935 unsigned char buf[VPD_TMP_BUF_SIZE];
936 int ret = 0; 936 int ret = 0;
937 937
938 memset(buf, 0, VPD_TMP_BUF_SIZE); 938 memset(buf, 0, VPD_TMP_BUF_SIZE);
939 939
940 switch (vpd->device_identifier_code_set) { 940 switch (vpd->device_identifier_code_set) {
941 case 0x01: /* Binary */ 941 case 0x01: /* Binary */
942 sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", 942 sprintf(buf, "T10 VPD Binary Device Identifier: %s\n",
943 &vpd->device_identifier[0]); 943 &vpd->device_identifier[0]);
944 break; 944 break;
945 case 0x02: /* ASCII */ 945 case 0x02: /* ASCII */
946 sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", 946 sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n",
947 &vpd->device_identifier[0]); 947 &vpd->device_identifier[0]);
948 break; 948 break;
949 case 0x03: /* UTF-8 */ 949 case 0x03: /* UTF-8 */
950 sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", 950 sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n",
951 &vpd->device_identifier[0]); 951 &vpd->device_identifier[0]);
952 break; 952 break;
953 default: 953 default:
954 sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" 954 sprintf(buf, "T10 VPD Device Identifier encoding unsupported:"
955 " 0x%02x", vpd->device_identifier_code_set); 955 " 0x%02x", vpd->device_identifier_code_set);
956 ret = -EINVAL; 956 ret = -EINVAL;
957 break; 957 break;
958 } 958 }
959 959
960 if (p_buf) 960 if (p_buf)
961 strncpy(p_buf, buf, p_buf_len); 961 strncpy(p_buf, buf, p_buf_len);
962 else 962 else
963 pr_debug("%s", buf); 963 pr_debug("%s", buf);
964 964
965 return ret; 965 return ret;
966 } 966 }
967 967
968 int 968 int
969 transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) 969 transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83)
970 { 970 {
971 static const char hex_str[] = "0123456789abcdef"; 971 static const char hex_str[] = "0123456789abcdef";
972 int j = 0, i = 4; /* offset to start of the identifer */ 972 int j = 0, i = 4; /* offset to start of the identifer */
973 973
974 /* 974 /*
975 * The VPD Code Set (encoding) 975 * The VPD Code Set (encoding)
976 * 976 *
977 * from spc3r23.pdf Section 7.6.3.1 Table 296 977 * from spc3r23.pdf Section 7.6.3.1 Table 296
978 */ 978 */
979 vpd->device_identifier_code_set = (page_83[0] & 0x0f); 979 vpd->device_identifier_code_set = (page_83[0] & 0x0f);
980 switch (vpd->device_identifier_code_set) { 980 switch (vpd->device_identifier_code_set) {
981 case 0x01: /* Binary */ 981 case 0x01: /* Binary */
982 vpd->device_identifier[j++] = 982 vpd->device_identifier[j++] =
983 hex_str[vpd->device_identifier_type]; 983 hex_str[vpd->device_identifier_type];
984 while (i < (4 + page_83[3])) { 984 while (i < (4 + page_83[3])) {
985 vpd->device_identifier[j++] = 985 vpd->device_identifier[j++] =
986 hex_str[(page_83[i] & 0xf0) >> 4]; 986 hex_str[(page_83[i] & 0xf0) >> 4];
987 vpd->device_identifier[j++] = 987 vpd->device_identifier[j++] =
988 hex_str[page_83[i] & 0x0f]; 988 hex_str[page_83[i] & 0x0f];
989 i++; 989 i++;
990 } 990 }
991 break; 991 break;
992 case 0x02: /* ASCII */ 992 case 0x02: /* ASCII */
993 case 0x03: /* UTF-8 */ 993 case 0x03: /* UTF-8 */
994 while (i < (4 + page_83[3])) 994 while (i < (4 + page_83[3]))
995 vpd->device_identifier[j++] = page_83[i++]; 995 vpd->device_identifier[j++] = page_83[i++];
996 break; 996 break;
997 default: 997 default:
998 break; 998 break;
999 } 999 }
1000 1000
1001 return transport_dump_vpd_ident(vpd, NULL, 0); 1001 return transport_dump_vpd_ident(vpd, NULL, 0);
1002 } 1002 }
1003 EXPORT_SYMBOL(transport_set_vpd_ident); 1003 EXPORT_SYMBOL(transport_set_vpd_ident);
1004 1004
1005 static void core_setup_task_attr_emulation(struct se_device *dev) 1005 static void core_setup_task_attr_emulation(struct se_device *dev)
1006 { 1006 {
1007 /* 1007 /*
1008 * If this device is from Target_Core_Mod/pSCSI, disable the 1008 * If this device is from Target_Core_Mod/pSCSI, disable the
1009 * SAM Task Attribute emulation. 1009 * SAM Task Attribute emulation.
1010 * 1010 *
1011 * This is currently not available in upsream Linux/SCSI Target 1011 * This is currently not available in upsream Linux/SCSI Target
1012 * mode code, and is assumed to be disabled while using TCM/pSCSI. 1012 * mode code, and is assumed to be disabled while using TCM/pSCSI.
1013 */ 1013 */
1014 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1014 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1015 dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; 1015 dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH;
1016 return; 1016 return;
1017 } 1017 }
1018 1018
1019 dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; 1019 dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED;
1020 pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" 1020 pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x"
1021 " device\n", dev->transport->name, 1021 " device\n", dev->transport->name,
1022 dev->transport->get_device_rev(dev)); 1022 dev->transport->get_device_rev(dev));
1023 } 1023 }
1024 1024
1025 static void scsi_dump_inquiry(struct se_device *dev) 1025 static void scsi_dump_inquiry(struct se_device *dev)
1026 { 1026 {
1027 struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; 1027 struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
1028 char buf[17]; 1028 char buf[17];
1029 int i, device_type; 1029 int i, device_type;
1030 /* 1030 /*
1031 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1031 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1032 */ 1032 */
1033 for (i = 0; i < 8; i++) 1033 for (i = 0; i < 8; i++)
1034 if (wwn->vendor[i] >= 0x20) 1034 if (wwn->vendor[i] >= 0x20)
1035 buf[i] = wwn->vendor[i]; 1035 buf[i] = wwn->vendor[i];
1036 else 1036 else
1037 buf[i] = ' '; 1037 buf[i] = ' ';
1038 buf[i] = '\0'; 1038 buf[i] = '\0';
1039 pr_debug(" Vendor: %s\n", buf); 1039 pr_debug(" Vendor: %s\n", buf);
1040 1040
1041 for (i = 0; i < 16; i++) 1041 for (i = 0; i < 16; i++)
1042 if (wwn->model[i] >= 0x20) 1042 if (wwn->model[i] >= 0x20)
1043 buf[i] = wwn->model[i]; 1043 buf[i] = wwn->model[i];
1044 else 1044 else
1045 buf[i] = ' '; 1045 buf[i] = ' ';
1046 buf[i] = '\0'; 1046 buf[i] = '\0';
1047 pr_debug(" Model: %s\n", buf); 1047 pr_debug(" Model: %s\n", buf);
1048 1048
1049 for (i = 0; i < 4; i++) 1049 for (i = 0; i < 4; i++)
1050 if (wwn->revision[i] >= 0x20) 1050 if (wwn->revision[i] >= 0x20)
1051 buf[i] = wwn->revision[i]; 1051 buf[i] = wwn->revision[i];
1052 else 1052 else
1053 buf[i] = ' '; 1053 buf[i] = ' ';
1054 buf[i] = '\0'; 1054 buf[i] = '\0';
1055 pr_debug(" Revision: %s\n", buf); 1055 pr_debug(" Revision: %s\n", buf);
1056 1056
1057 device_type = dev->transport->get_device_type(dev); 1057 device_type = dev->transport->get_device_type(dev);
1058 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1058 pr_debug(" Type: %s ", scsi_device_type(device_type));
1059 pr_debug(" ANSI SCSI revision: %02x\n", 1059 pr_debug(" ANSI SCSI revision: %02x\n",
1060 dev->transport->get_device_rev(dev)); 1060 dev->transport->get_device_rev(dev));
1061 } 1061 }
1062 1062
1063 struct se_device *transport_add_device_to_core_hba( 1063 struct se_device *transport_add_device_to_core_hba(
1064 struct se_hba *hba, 1064 struct se_hba *hba,
1065 struct se_subsystem_api *transport, 1065 struct se_subsystem_api *transport,
1066 struct se_subsystem_dev *se_dev, 1066 struct se_subsystem_dev *se_dev,
1067 u32 device_flags, 1067 u32 device_flags,
1068 void *transport_dev, 1068 void *transport_dev,
1069 struct se_dev_limits *dev_limits, 1069 struct se_dev_limits *dev_limits,
1070 const char *inquiry_prod, 1070 const char *inquiry_prod,
1071 const char *inquiry_rev) 1071 const char *inquiry_rev)
1072 { 1072 {
1073 int force_pt; 1073 int force_pt;
1074 struct se_device *dev; 1074 struct se_device *dev;
1075 1075
1076 dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); 1076 dev = kzalloc(sizeof(struct se_device), GFP_KERNEL);
1077 if (!dev) { 1077 if (!dev) {
1078 pr_err("Unable to allocate memory for se_dev_t\n"); 1078 pr_err("Unable to allocate memory for se_dev_t\n");
1079 return NULL; 1079 return NULL;
1080 } 1080 }
1081 1081
1082 dev->dev_flags = device_flags; 1082 dev->dev_flags = device_flags;
1083 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 1083 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
1084 dev->dev_ptr = transport_dev; 1084 dev->dev_ptr = transport_dev;
1085 dev->se_hba = hba; 1085 dev->se_hba = hba;
1086 dev->se_sub_dev = se_dev; 1086 dev->se_sub_dev = se_dev;
1087 dev->transport = transport; 1087 dev->transport = transport;
1088 INIT_LIST_HEAD(&dev->dev_list); 1088 INIT_LIST_HEAD(&dev->dev_list);
1089 INIT_LIST_HEAD(&dev->dev_sep_list); 1089 INIT_LIST_HEAD(&dev->dev_sep_list);
1090 INIT_LIST_HEAD(&dev->dev_tmr_list); 1090 INIT_LIST_HEAD(&dev->dev_tmr_list);
1091 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1091 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1092 INIT_LIST_HEAD(&dev->state_list); 1092 INIT_LIST_HEAD(&dev->state_list);
1093 INIT_LIST_HEAD(&dev->qf_cmd_list); 1093 INIT_LIST_HEAD(&dev->qf_cmd_list);
1094 spin_lock_init(&dev->execute_task_lock); 1094 spin_lock_init(&dev->execute_task_lock);
1095 spin_lock_init(&dev->delayed_cmd_lock); 1095 spin_lock_init(&dev->delayed_cmd_lock);
1096 spin_lock_init(&dev->dev_reservation_lock); 1096 spin_lock_init(&dev->dev_reservation_lock);
1097 spin_lock_init(&dev->dev_status_lock); 1097 spin_lock_init(&dev->dev_status_lock);
1098 spin_lock_init(&dev->se_port_lock); 1098 spin_lock_init(&dev->se_port_lock);
1099 spin_lock_init(&dev->se_tmr_lock); 1099 spin_lock_init(&dev->se_tmr_lock);
1100 spin_lock_init(&dev->qf_cmd_lock); 1100 spin_lock_init(&dev->qf_cmd_lock);
1101 atomic_set(&dev->dev_ordered_id, 0); 1101 atomic_set(&dev->dev_ordered_id, 0);
1102 1102
1103 se_dev_set_default_attribs(dev, dev_limits); 1103 se_dev_set_default_attribs(dev, dev_limits);
1104 1104
1105 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1105 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1106 dev->creation_time = get_jiffies_64(); 1106 dev->creation_time = get_jiffies_64();
1107 spin_lock_init(&dev->stats_lock); 1107 spin_lock_init(&dev->stats_lock);
1108 1108
1109 spin_lock(&hba->device_lock); 1109 spin_lock(&hba->device_lock);
1110 list_add_tail(&dev->dev_list, &hba->hba_dev_list); 1110 list_add_tail(&dev->dev_list, &hba->hba_dev_list);
1111 hba->dev_count++; 1111 hba->dev_count++;
1112 spin_unlock(&hba->device_lock); 1112 spin_unlock(&hba->device_lock);
1113 /* 1113 /*
1114 * Setup the SAM Task Attribute emulation for struct se_device 1114 * Setup the SAM Task Attribute emulation for struct se_device
1115 */ 1115 */
1116 core_setup_task_attr_emulation(dev); 1116 core_setup_task_attr_emulation(dev);
1117 /* 1117 /*
1118 * Force PR and ALUA passthrough emulation with internal object use. 1118 * Force PR and ALUA passthrough emulation with internal object use.
1119 */ 1119 */
1120 force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); 1120 force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE);
1121 /* 1121 /*
1122 * Setup the Reservations infrastructure for struct se_device 1122 * Setup the Reservations infrastructure for struct se_device
1123 */ 1123 */
1124 core_setup_reservations(dev, force_pt); 1124 core_setup_reservations(dev, force_pt);
1125 /* 1125 /*
1126 * Setup the Asymmetric Logical Unit Assignment for struct se_device 1126 * Setup the Asymmetric Logical Unit Assignment for struct se_device
1127 */ 1127 */
1128 if (core_setup_alua(dev, force_pt) < 0) 1128 if (core_setup_alua(dev, force_pt) < 0)
1129 goto err_dev_list; 1129 goto err_dev_list;
1130 1130
1131 /* 1131 /*
1132 * Startup the struct se_device processing thread 1132 * Startup the struct se_device processing thread
1133 */ 1133 */
1134 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1134 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1135 dev->transport->name); 1135 dev->transport->name);
1136 if (!dev->tmr_wq) { 1136 if (!dev->tmr_wq) {
1137 pr_err("Unable to create tmr workqueue for %s\n", 1137 pr_err("Unable to create tmr workqueue for %s\n",
1138 dev->transport->name); 1138 dev->transport->name);
1139 goto err_dev_list; 1139 goto err_dev_list;
1140 } 1140 }
1141 /* 1141 /*
1142 * Setup work_queue for QUEUE_FULL 1142 * Setup work_queue for QUEUE_FULL
1143 */ 1143 */
1144 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1144 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1145 /* 1145 /*
1146 * Preload the initial INQUIRY const values if we are doing 1146 * Preload the initial INQUIRY const values if we are doing
1147 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1147 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1148 * passthrough because this is being provided by the backend LLD. 1148 * passthrough because this is being provided by the backend LLD.
1149 * This is required so that transport_get_inquiry() copies these 1149 * This is required so that transport_get_inquiry() copies these
1150 * originals once back into DEV_T10_WWN(dev) for the virtual device 1150 * originals once back into DEV_T10_WWN(dev) for the virtual device
1151 * setup. 1151 * setup.
1152 */ 1152 */
1153 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1153 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1154 if (!inquiry_prod || !inquiry_rev) { 1154 if (!inquiry_prod || !inquiry_rev) {
1155 pr_err("All non TCM/pSCSI plugins require" 1155 pr_err("All non TCM/pSCSI plugins require"
1156 " INQUIRY consts\n"); 1156 " INQUIRY consts\n");
1157 goto err_wq; 1157 goto err_wq;
1158 } 1158 }
1159 1159
1160 strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1160 strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1161 strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); 1161 strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16);
1162 strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); 1162 strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4);
1163 } 1163 }
1164 scsi_dump_inquiry(dev); 1164 scsi_dump_inquiry(dev);
1165 1165
1166 return dev; 1166 return dev;
1167 1167
1168 err_wq: 1168 err_wq:
1169 destroy_workqueue(dev->tmr_wq); 1169 destroy_workqueue(dev->tmr_wq);
1170 err_dev_list: 1170 err_dev_list:
1171 spin_lock(&hba->device_lock); 1171 spin_lock(&hba->device_lock);
1172 list_del(&dev->dev_list); 1172 list_del(&dev->dev_list);
1173 hba->dev_count--; 1173 hba->dev_count--;
1174 spin_unlock(&hba->device_lock); 1174 spin_unlock(&hba->device_lock);
1175 1175
1176 se_release_vpd_for_dev(dev); 1176 se_release_vpd_for_dev(dev);
1177 1177
1178 kfree(dev); 1178 kfree(dev);
1179 1179
1180 return NULL; 1180 return NULL;
1181 } 1181 }
1182 EXPORT_SYMBOL(transport_add_device_to_core_hba); 1182 EXPORT_SYMBOL(transport_add_device_to_core_hba);
1183 1183
1184 int target_cmd_size_check(struct se_cmd *cmd, unsigned int size) 1184 int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
1185 { 1185 {
1186 struct se_device *dev = cmd->se_dev; 1186 struct se_device *dev = cmd->se_dev;
1187 1187
1188 if (cmd->unknown_data_length) { 1188 if (cmd->unknown_data_length) {
1189 cmd->data_length = size; 1189 cmd->data_length = size;
1190 } else if (size != cmd->data_length) { 1190 } else if (size != cmd->data_length) {
1191 pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" 1191 pr_warn("TARGET_CORE[%s]: Expected Transfer Length:"
1192 " %u does not match SCSI CDB Length: %u for SAM Opcode:" 1192 " %u does not match SCSI CDB Length: %u for SAM Opcode:"
1193 " 0x%02x\n", cmd->se_tfo->get_fabric_name(), 1193 " 0x%02x\n", cmd->se_tfo->get_fabric_name(),
1194 cmd->data_length, size, cmd->t_task_cdb[0]); 1194 cmd->data_length, size, cmd->t_task_cdb[0]);
1195 1195
1196 if (cmd->data_direction == DMA_TO_DEVICE) { 1196 if (cmd->data_direction == DMA_TO_DEVICE) {
1197 pr_err("Rejecting underflow/overflow" 1197 pr_err("Rejecting underflow/overflow"
1198 " WRITE data\n"); 1198 " WRITE data\n");
1199 goto out_invalid_cdb_field; 1199 goto out_invalid_cdb_field;
1200 } 1200 }
1201 /* 1201 /*
1202 * Reject READ_* or WRITE_* with overflow/underflow for 1202 * Reject READ_* or WRITE_* with overflow/underflow for
1203 * type SCF_SCSI_DATA_CDB. 1203 * type SCF_SCSI_DATA_CDB.
1204 */ 1204 */
1205 if (dev->se_sub_dev->se_dev_attrib.block_size != 512) { 1205 if (dev->se_sub_dev->se_dev_attrib.block_size != 512) {
1206 pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" 1206 pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
1207 " CDB on non 512-byte sector setup subsystem" 1207 " CDB on non 512-byte sector setup subsystem"
1208 " plugin: %s\n", dev->transport->name); 1208 " plugin: %s\n", dev->transport->name);
1209 /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ 1209 /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
1210 goto out_invalid_cdb_field; 1210 goto out_invalid_cdb_field;
1211 } 1211 }
1212 /* 1212 /*
1213 * For the overflow case keep the existing fabric provided 1213 * For the overflow case keep the existing fabric provided
1214 * ->data_length. Otherwise for the underflow case, reset 1214 * ->data_length. Otherwise for the underflow case, reset
1215 * ->data_length to the smaller SCSI expected data transfer 1215 * ->data_length to the smaller SCSI expected data transfer
1216 * length. 1216 * length.
1217 */ 1217 */
1218 if (size > cmd->data_length) { 1218 if (size > cmd->data_length) {
1219 cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; 1219 cmd->se_cmd_flags |= SCF_OVERFLOW_BIT;
1220 cmd->residual_count = (size - cmd->data_length); 1220 cmd->residual_count = (size - cmd->data_length);
1221 } else { 1221 } else {
1222 cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; 1222 cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
1223 cmd->residual_count = (cmd->data_length - size); 1223 cmd->residual_count = (cmd->data_length - size);
1224 cmd->data_length = size; 1224 cmd->data_length = size;
1225 } 1225 }
1226 } 1226 }
1227 1227
1228 return 0; 1228 return 0;
1229 1229
1230 out_invalid_cdb_field: 1230 out_invalid_cdb_field:
1231 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1231 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1232 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1232 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
1233 return -EINVAL; 1233 return -EINVAL;
1234 } 1234 }
1235 1235
1236 /* 1236 /*
1237 * Used by fabric modules containing a local struct se_cmd within their 1237 * Used by fabric modules containing a local struct se_cmd within their
1238 * fabric dependent per I/O descriptor. 1238 * fabric dependent per I/O descriptor.
1239 */ 1239 */
1240 void transport_init_se_cmd( 1240 void transport_init_se_cmd(
1241 struct se_cmd *cmd, 1241 struct se_cmd *cmd,
1242 struct target_core_fabric_ops *tfo, 1242 struct target_core_fabric_ops *tfo,
1243 struct se_session *se_sess, 1243 struct se_session *se_sess,
1244 u32 data_length, 1244 u32 data_length,
1245 int data_direction, 1245 int data_direction,
1246 int task_attr, 1246 int task_attr,
1247 unsigned char *sense_buffer) 1247 unsigned char *sense_buffer)
1248 { 1248 {
1249 INIT_LIST_HEAD(&cmd->se_lun_node); 1249 INIT_LIST_HEAD(&cmd->se_lun_node);
1250 INIT_LIST_HEAD(&cmd->se_delayed_node); 1250 INIT_LIST_HEAD(&cmd->se_delayed_node);
1251 INIT_LIST_HEAD(&cmd->se_qf_node); 1251 INIT_LIST_HEAD(&cmd->se_qf_node);
1252 INIT_LIST_HEAD(&cmd->se_cmd_list); 1252 INIT_LIST_HEAD(&cmd->se_cmd_list);
1253 INIT_LIST_HEAD(&cmd->state_list); 1253 INIT_LIST_HEAD(&cmd->state_list);
1254 init_completion(&cmd->transport_lun_fe_stop_comp); 1254 init_completion(&cmd->transport_lun_fe_stop_comp);
1255 init_completion(&cmd->transport_lun_stop_comp); 1255 init_completion(&cmd->transport_lun_stop_comp);
1256 init_completion(&cmd->t_transport_stop_comp); 1256 init_completion(&cmd->t_transport_stop_comp);
1257 init_completion(&cmd->cmd_wait_comp); 1257 init_completion(&cmd->cmd_wait_comp);
1258 init_completion(&cmd->task_stop_comp); 1258 init_completion(&cmd->task_stop_comp);
1259 spin_lock_init(&cmd->t_state_lock); 1259 spin_lock_init(&cmd->t_state_lock);
1260 cmd->transport_state = CMD_T_DEV_ACTIVE; 1260 cmd->transport_state = CMD_T_DEV_ACTIVE;
1261 1261
1262 cmd->se_tfo = tfo; 1262 cmd->se_tfo = tfo;
1263 cmd->se_sess = se_sess; 1263 cmd->se_sess = se_sess;
1264 cmd->data_length = data_length; 1264 cmd->data_length = data_length;
1265 cmd->data_direction = data_direction; 1265 cmd->data_direction = data_direction;
1266 cmd->sam_task_attr = task_attr; 1266 cmd->sam_task_attr = task_attr;
1267 cmd->sense_buffer = sense_buffer; 1267 cmd->sense_buffer = sense_buffer;
1268 1268
1269 cmd->state_active = false; 1269 cmd->state_active = false;
1270 } 1270 }
1271 EXPORT_SYMBOL(transport_init_se_cmd); 1271 EXPORT_SYMBOL(transport_init_se_cmd);
1272 1272
1273 static int transport_check_alloc_task_attr(struct se_cmd *cmd) 1273 static int transport_check_alloc_task_attr(struct se_cmd *cmd)
1274 { 1274 {
1275 /* 1275 /*
1276 * Check if SAM Task Attribute emulation is enabled for this 1276 * Check if SAM Task Attribute emulation is enabled for this
1277 * struct se_device storage object 1277 * struct se_device storage object
1278 */ 1278 */
1279 if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) 1279 if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
1280 return 0; 1280 return 0;
1281 1281
1282 if (cmd->sam_task_attr == MSG_ACA_TAG) { 1282 if (cmd->sam_task_attr == MSG_ACA_TAG) {
1283 pr_debug("SAM Task Attribute ACA" 1283 pr_debug("SAM Task Attribute ACA"
1284 " emulation is not supported\n"); 1284 " emulation is not supported\n");
1285 return -EINVAL; 1285 return -EINVAL;
1286 } 1286 }
1287 /* 1287 /*
1288 * Used to determine when ORDERED commands should go from 1288 * Used to determine when ORDERED commands should go from
1289 * Dormant to Active status. 1289 * Dormant to Active status.
1290 */ 1290 */
1291 cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); 1291 cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id);
1292 smp_mb__after_atomic_inc(); 1292 smp_mb__after_atomic_inc();
1293 pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", 1293 pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
1294 cmd->se_ordered_id, cmd->sam_task_attr, 1294 cmd->se_ordered_id, cmd->sam_task_attr,
1295 cmd->se_dev->transport->name); 1295 cmd->se_dev->transport->name);
1296 return 0; 1296 return 0;
1297 } 1297 }
1298 1298
1299 /* target_setup_cmd_from_cdb(): 1299 /* target_setup_cmd_from_cdb():
1300 * 1300 *
1301 * Called from fabric RX Thread. 1301 * Called from fabric RX Thread.
1302 */ 1302 */
1303 int target_setup_cmd_from_cdb( 1303 int target_setup_cmd_from_cdb(
1304 struct se_cmd *cmd, 1304 struct se_cmd *cmd,
1305 unsigned char *cdb) 1305 unsigned char *cdb)
1306 { 1306 {
1307 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 1307 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
1308 u32 pr_reg_type = 0; 1308 u32 pr_reg_type = 0;
1309 u8 alua_ascq = 0; 1309 u8 alua_ascq = 0;
1310 unsigned long flags; 1310 unsigned long flags;
1311 int ret; 1311 int ret;
1312 1312
1313 /* 1313 /*
1314 * Ensure that the received CDB is less than the max (252 + 8) bytes 1314 * Ensure that the received CDB is less than the max (252 + 8) bytes
1315 * for VARIABLE_LENGTH_CMD 1315 * for VARIABLE_LENGTH_CMD
1316 */ 1316 */
1317 if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { 1317 if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) {
1318 pr_err("Received SCSI CDB with command_size: %d that" 1318 pr_err("Received SCSI CDB with command_size: %d that"
1319 " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", 1319 " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
1320 scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); 1320 scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE);
1321 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1321 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1322 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1322 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
1323 return -EINVAL; 1323 return -EINVAL;
1324 } 1324 }
1325 /* 1325 /*
1326 * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, 1326 * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
1327 * allocate the additional extended CDB buffer now.. Otherwise 1327 * allocate the additional extended CDB buffer now.. Otherwise
1328 * setup the pointer from __t_task_cdb to t_task_cdb. 1328 * setup the pointer from __t_task_cdb to t_task_cdb.
1329 */ 1329 */
1330 if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { 1330 if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) {
1331 cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), 1331 cmd->t_task_cdb = kzalloc(scsi_command_size(cdb),
1332 GFP_KERNEL); 1332 GFP_KERNEL);
1333 if (!cmd->t_task_cdb) { 1333 if (!cmd->t_task_cdb) {
1334 pr_err("Unable to allocate cmd->t_task_cdb" 1334 pr_err("Unable to allocate cmd->t_task_cdb"
1335 " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", 1335 " %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
1336 scsi_command_size(cdb), 1336 scsi_command_size(cdb),
1337 (unsigned long)sizeof(cmd->__t_task_cdb)); 1337 (unsigned long)sizeof(cmd->__t_task_cdb));
1338 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1338 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1339 cmd->scsi_sense_reason = 1339 cmd->scsi_sense_reason =
1340 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1340 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1341 return -ENOMEM; 1341 return -ENOMEM;
1342 } 1342 }
1343 } else 1343 } else
1344 cmd->t_task_cdb = &cmd->__t_task_cdb[0]; 1344 cmd->t_task_cdb = &cmd->__t_task_cdb[0];
1345 /* 1345 /*
1346 * Copy the original CDB into cmd-> 1346 * Copy the original CDB into cmd->
1347 */ 1347 */
1348 memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); 1348 memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb));
1349 1349
1350 /* 1350 /*
1351 * Check for an existing UNIT ATTENTION condition 1351 * Check for an existing UNIT ATTENTION condition
1352 */ 1352 */
1353 if (core_scsi3_ua_check(cmd, cdb) < 0) { 1353 if (core_scsi3_ua_check(cmd, cdb) < 0) {
1354 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1354 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1355 cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; 1355 cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION;
1356 return -EINVAL; 1356 return -EINVAL;
1357 } 1357 }
1358 1358
1359 ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); 1359 ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq);
1360 if (ret != 0) { 1360 if (ret != 0) {
1361 /* 1361 /*
1362 * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; 1362 * Set SCSI additional sense code (ASC) to 'LUN Not Accessible';
1363 * The ALUA additional sense code qualifier (ASCQ) is determined 1363 * The ALUA additional sense code qualifier (ASCQ) is determined
1364 * by the ALUA primary or secondary access state.. 1364 * by the ALUA primary or secondary access state..
1365 */ 1365 */
1366 if (ret > 0) { 1366 if (ret > 0) {
1367 pr_debug("[%s]: ALUA TG Port not available, " 1367 pr_debug("[%s]: ALUA TG Port not available, "
1368 "SenseKey: NOT_READY, ASC/ASCQ: " 1368 "SenseKey: NOT_READY, ASC/ASCQ: "
1369 "0x04/0x%02x\n", 1369 "0x04/0x%02x\n",
1370 cmd->se_tfo->get_fabric_name(), alua_ascq); 1370 cmd->se_tfo->get_fabric_name(), alua_ascq);
1371 1371
1372 transport_set_sense_codes(cmd, 0x04, alua_ascq); 1372 transport_set_sense_codes(cmd, 0x04, alua_ascq);
1373 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1373 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1374 cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; 1374 cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY;
1375 return -EINVAL; 1375 return -EINVAL;
1376 } 1376 }
1377 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1377 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1378 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1378 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
1379 return -EINVAL; 1379 return -EINVAL;
1380 } 1380 }
1381 1381
1382 /* 1382 /*
1383 * Check status for SPC-3 Persistent Reservations 1383 * Check status for SPC-3 Persistent Reservations
1384 */ 1384 */
1385 if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type)) { 1385 if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type)) {
1386 if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( 1386 if (su_dev->t10_pr.pr_ops.t10_seq_non_holder(
1387 cmd, cdb, pr_reg_type) != 0) { 1387 cmd, cdb, pr_reg_type) != 0) {
1388 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1388 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1389 cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; 1389 cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT;
1390 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; 1390 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
1391 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 1391 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
1392 return -EBUSY; 1392 return -EBUSY;
1393 } 1393 }
1394 /* 1394 /*
1395 * This means the CDB is allowed for the SCSI Initiator port 1395 * This means the CDB is allowed for the SCSI Initiator port
1396 * when said port is *NOT* holding the legacy SPC-2 or 1396 * when said port is *NOT* holding the legacy SPC-2 or
1397 * SPC-3 Persistent Reservation. 1397 * SPC-3 Persistent Reservation.
1398 */ 1398 */
1399 } 1399 }
1400 1400
1401 ret = cmd->se_dev->transport->parse_cdb(cmd); 1401 ret = cmd->se_dev->transport->parse_cdb(cmd);
1402 if (ret < 0) 1402 if (ret < 0)
1403 return ret; 1403 return ret;
1404 1404
1405 spin_lock_irqsave(&cmd->t_state_lock, flags); 1405 spin_lock_irqsave(&cmd->t_state_lock, flags);
1406 cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; 1406 cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
1407 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 1407 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
1408 1408
1409 /* 1409 /*
1410 * Check for SAM Task Attribute Emulation 1410 * Check for SAM Task Attribute Emulation
1411 */ 1411 */
1412 if (transport_check_alloc_task_attr(cmd) < 0) { 1412 if (transport_check_alloc_task_attr(cmd) < 0) {
1413 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1413 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1414 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1414 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
1415 return -EINVAL; 1415 return -EINVAL;
1416 } 1416 }
1417 spin_lock(&cmd->se_lun->lun_sep_lock); 1417 spin_lock(&cmd->se_lun->lun_sep_lock);
1418 if (cmd->se_lun->lun_sep) 1418 if (cmd->se_lun->lun_sep)
1419 cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; 1419 cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
1420 spin_unlock(&cmd->se_lun->lun_sep_lock); 1420 spin_unlock(&cmd->se_lun->lun_sep_lock);
1421 return 0; 1421 return 0;
1422 } 1422 }
1423 EXPORT_SYMBOL(target_setup_cmd_from_cdb); 1423 EXPORT_SYMBOL(target_setup_cmd_from_cdb);
1424 1424
1425 /* 1425 /*
1426 * Used by fabric module frontends to queue tasks directly. 1426 * Used by fabric module frontends to queue tasks directly.
1427 * Many only be used from process context only 1427 * Many only be used from process context only
1428 */ 1428 */
1429 int transport_handle_cdb_direct( 1429 int transport_handle_cdb_direct(
1430 struct se_cmd *cmd) 1430 struct se_cmd *cmd)
1431 { 1431 {
1432 int ret; 1432 int ret;
1433 1433
1434 if (!cmd->se_lun) { 1434 if (!cmd->se_lun) {
1435 dump_stack(); 1435 dump_stack();
1436 pr_err("cmd->se_lun is NULL\n"); 1436 pr_err("cmd->se_lun is NULL\n");
1437 return -EINVAL; 1437 return -EINVAL;
1438 } 1438 }
1439 if (in_interrupt()) { 1439 if (in_interrupt()) {
1440 dump_stack(); 1440 dump_stack();
1441 pr_err("transport_generic_handle_cdb cannot be called" 1441 pr_err("transport_generic_handle_cdb cannot be called"
1442 " from interrupt context\n"); 1442 " from interrupt context\n");
1443 return -EINVAL; 1443 return -EINVAL;
1444 } 1444 }
1445 /* 1445 /*
1446 * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that 1446 * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that
1447 * outstanding descriptors are handled correctly during shutdown via 1447 * outstanding descriptors are handled correctly during shutdown via
1448 * transport_wait_for_tasks() 1448 * transport_wait_for_tasks()
1449 * 1449 *
1450 * Also, we don't take cmd->t_state_lock here as we only expect 1450 * Also, we don't take cmd->t_state_lock here as we only expect
1451 * this to be called for initial descriptor submission. 1451 * this to be called for initial descriptor submission.
1452 */ 1452 */
1453 cmd->t_state = TRANSPORT_NEW_CMD; 1453 cmd->t_state = TRANSPORT_NEW_CMD;
1454 cmd->transport_state |= CMD_T_ACTIVE; 1454 cmd->transport_state |= CMD_T_ACTIVE;
1455 1455
1456 /* 1456 /*
1457 * transport_generic_new_cmd() is already handling QUEUE_FULL, 1457 * transport_generic_new_cmd() is already handling QUEUE_FULL,
1458 * so follow TRANSPORT_NEW_CMD processing thread context usage 1458 * so follow TRANSPORT_NEW_CMD processing thread context usage
1459 * and call transport_generic_request_failure() if necessary.. 1459 * and call transport_generic_request_failure() if necessary..
1460 */ 1460 */
1461 ret = transport_generic_new_cmd(cmd); 1461 ret = transport_generic_new_cmd(cmd);
1462 if (ret < 0) 1462 if (ret < 0)
1463 transport_generic_request_failure(cmd); 1463 transport_generic_request_failure(cmd);
1464 1464
1465 return 0; 1465 return 0;
1466 } 1466 }
1467 EXPORT_SYMBOL(transport_handle_cdb_direct); 1467 EXPORT_SYMBOL(transport_handle_cdb_direct);
1468 1468
1469 /** 1469 /**
1470 * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd 1470 * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
1471 * 1471 *
1472 * @se_cmd: command descriptor to submit 1472 * @se_cmd: command descriptor to submit
1473 * @se_sess: associated se_sess for endpoint 1473 * @se_sess: associated se_sess for endpoint
1474 * @cdb: pointer to SCSI CDB 1474 * @cdb: pointer to SCSI CDB
1475 * @sense: pointer to SCSI sense buffer 1475 * @sense: pointer to SCSI sense buffer
1476 * @unpacked_lun: unpacked LUN to reference for struct se_lun 1476 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1477 * @data_length: fabric expected data transfer length 1477 * @data_length: fabric expected data transfer length
1478 * @task_addr: SAM task attribute 1478 * @task_addr: SAM task attribute
1479 * @data_dir: DMA data direction 1479 * @data_dir: DMA data direction
1480 * @flags: flags for command submission from target_sc_flags_tables 1480 * @flags: flags for command submission from target_sc_flags_tables
1481 * 1481 *
1482 * Returns non zero to signal active I/O shutdown failure. All other 1482 * Returns non zero to signal active I/O shutdown failure. All other
1483 * setup exceptions will be returned as a SCSI CHECK_CONDITION response, 1483 * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
1484 * but still return zero here. 1484 * but still return zero here.
1485 * 1485 *
1486 * This may only be called from process context, and also currently 1486 * This may only be called from process context, and also currently
1487 * assumes internal allocation of fabric payload buffer by target-core. 1487 * assumes internal allocation of fabric payload buffer by target-core.
1488 **/ 1488 **/
1489 int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, 1489 int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
1490 unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, 1490 unsigned char *cdb, unsigned char *sense, u32 unpacked_lun,
1491 u32 data_length, int task_attr, int data_dir, int flags) 1491 u32 data_length, int task_attr, int data_dir, int flags)
1492 { 1492 {
1493 struct se_portal_group *se_tpg; 1493 struct se_portal_group *se_tpg;
1494 int rc; 1494 int rc;
1495 1495
1496 se_tpg = se_sess->se_tpg; 1496 se_tpg = se_sess->se_tpg;
1497 BUG_ON(!se_tpg); 1497 BUG_ON(!se_tpg);
1498 BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); 1498 BUG_ON(se_cmd->se_tfo || se_cmd->se_sess);
1499 BUG_ON(in_interrupt()); 1499 BUG_ON(in_interrupt());
1500 /* 1500 /*
1501 * Initialize se_cmd for target operation. From this point 1501 * Initialize se_cmd for target operation. From this point
1502 * exceptions are handled by sending exception status via 1502 * exceptions are handled by sending exception status via
1503 * target_core_fabric_ops->queue_status() callback 1503 * target_core_fabric_ops->queue_status() callback
1504 */ 1504 */
1505 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 1505 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
1506 data_length, data_dir, task_attr, sense); 1506 data_length, data_dir, task_attr, sense);
1507 if (flags & TARGET_SCF_UNKNOWN_SIZE) 1507 if (flags & TARGET_SCF_UNKNOWN_SIZE)
1508 se_cmd->unknown_data_length = 1; 1508 se_cmd->unknown_data_length = 1;
1509 /* 1509 /*
1510 * Obtain struct se_cmd->cmd_kref reference and add new cmd to 1510 * Obtain struct se_cmd->cmd_kref reference and add new cmd to
1511 * se_sess->sess_cmd_list. A second kref_get here is necessary 1511 * se_sess->sess_cmd_list. A second kref_get here is necessary
1512 * for fabrics using TARGET_SCF_ACK_KREF that expect a second 1512 * for fabrics using TARGET_SCF_ACK_KREF that expect a second
1513 * kref_put() to happen during fabric packet acknowledgement. 1513 * kref_put() to happen during fabric packet acknowledgement.
1514 */ 1514 */
1515 rc = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); 1515 rc = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
1516 if (rc) 1516 if (rc)
1517 return rc; 1517 return rc;
1518 /* 1518 /*
1519 * Signal bidirectional data payloads to target-core 1519 * Signal bidirectional data payloads to target-core
1520 */ 1520 */
1521 if (flags & TARGET_SCF_BIDI_OP) 1521 if (flags & TARGET_SCF_BIDI_OP)
1522 se_cmd->se_cmd_flags |= SCF_BIDI; 1522 se_cmd->se_cmd_flags |= SCF_BIDI;
1523 /* 1523 /*
1524 * Locate se_lun pointer and attach it to struct se_cmd 1524 * Locate se_lun pointer and attach it to struct se_cmd
1525 */ 1525 */
1526 if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) { 1526 if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) {
1527 transport_send_check_condition_and_sense(se_cmd, 1527 transport_send_check_condition_and_sense(se_cmd,
1528 se_cmd->scsi_sense_reason, 0); 1528 se_cmd->scsi_sense_reason, 0);
1529 target_put_sess_cmd(se_sess, se_cmd); 1529 target_put_sess_cmd(se_sess, se_cmd);
1530 return 0; 1530 return 0;
1531 } 1531 }
1532 1532
1533 rc = target_setup_cmd_from_cdb(se_cmd, cdb); 1533 rc = target_setup_cmd_from_cdb(se_cmd, cdb);
1534 if (rc != 0) { 1534 if (rc != 0) {
1535 transport_generic_request_failure(se_cmd); 1535 transport_generic_request_failure(se_cmd);
1536 return 0; 1536 return 0;
1537 } 1537 }
1538 1538
1539 /* 1539 /*
1540 * Check if we need to delay processing because of ALUA 1540 * Check if we need to delay processing because of ALUA
1541 * Active/NonOptimized primary access state.. 1541 * Active/NonOptimized primary access state..
1542 */ 1542 */
1543 core_alua_check_nonop_delay(se_cmd); 1543 core_alua_check_nonop_delay(se_cmd);
1544 1544
1545 transport_handle_cdb_direct(se_cmd); 1545 transport_handle_cdb_direct(se_cmd);
1546 return 0; 1546 return 0;
1547 } 1547 }
1548 EXPORT_SYMBOL(target_submit_cmd); 1548 EXPORT_SYMBOL(target_submit_cmd);
1549 1549
1550 static void target_complete_tmr_failure(struct work_struct *work) 1550 static void target_complete_tmr_failure(struct work_struct *work)
1551 { 1551 {
1552 struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); 1552 struct se_cmd *se_cmd = container_of(work, struct se_cmd, work);
1553 1553
1554 se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; 1554 se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
1555 se_cmd->se_tfo->queue_tm_rsp(se_cmd); 1555 se_cmd->se_tfo->queue_tm_rsp(se_cmd);
1556 transport_generic_free_cmd(se_cmd, 0); 1556 transport_generic_free_cmd(se_cmd, 0);
1557 } 1557 }
1558 1558
1559 /** 1559 /**
1560 * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd 1560 * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
1561 * for TMR CDBs 1561 * for TMR CDBs
1562 * 1562 *
1563 * @se_cmd: command descriptor to submit 1563 * @se_cmd: command descriptor to submit
1564 * @se_sess: associated se_sess for endpoint 1564 * @se_sess: associated se_sess for endpoint
1565 * @sense: pointer to SCSI sense buffer 1565 * @sense: pointer to SCSI sense buffer
1566 * @unpacked_lun: unpacked LUN to reference for struct se_lun 1566 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1567 * @fabric_context: fabric context for TMR req 1567 * @fabric_context: fabric context for TMR req
1568 * @tm_type: Type of TM request 1568 * @tm_type: Type of TM request
1569 * @gfp: gfp type for caller 1569 * @gfp: gfp type for caller
1570 * @tag: referenced task tag for TMR_ABORT_TASK 1570 * @tag: referenced task tag for TMR_ABORT_TASK
1571 * @flags: submit cmd flags 1571 * @flags: submit cmd flags
1572 * 1572 *
1573 * Callable from all contexts. 1573 * Callable from all contexts.
1574 **/ 1574 **/
1575 1575
1576 int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, 1576 int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
1577 unsigned char *sense, u32 unpacked_lun, 1577 unsigned char *sense, u32 unpacked_lun,
1578 void *fabric_tmr_ptr, unsigned char tm_type, 1578 void *fabric_tmr_ptr, unsigned char tm_type,
1579 gfp_t gfp, unsigned int tag, int flags) 1579 gfp_t gfp, unsigned int tag, int flags)
1580 { 1580 {
1581 struct se_portal_group *se_tpg; 1581 struct se_portal_group *se_tpg;
1582 int ret; 1582 int ret;
1583 1583
1584 se_tpg = se_sess->se_tpg; 1584 se_tpg = se_sess->se_tpg;
1585 BUG_ON(!se_tpg); 1585 BUG_ON(!se_tpg);
1586 1586
1587 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 1587 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
1588 0, DMA_NONE, MSG_SIMPLE_TAG, sense); 1588 0, DMA_NONE, MSG_SIMPLE_TAG, sense);
1589 /* 1589 /*
1590 * FIXME: Currently expect caller to handle se_cmd->se_tmr_req 1590 * FIXME: Currently expect caller to handle se_cmd->se_tmr_req
1591 * allocation failure. 1591 * allocation failure.
1592 */ 1592 */
1593 ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); 1593 ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp);
1594 if (ret < 0) 1594 if (ret < 0)
1595 return -ENOMEM; 1595 return -ENOMEM;
1596 1596
1597 if (tm_type == TMR_ABORT_TASK) 1597 if (tm_type == TMR_ABORT_TASK)
1598 se_cmd->se_tmr_req->ref_task_tag = tag; 1598 se_cmd->se_tmr_req->ref_task_tag = tag;
1599 1599
1600 /* See target_submit_cmd for commentary */ 1600 /* See target_submit_cmd for commentary */
1601 ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); 1601 ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
1602 if (ret) { 1602 if (ret) {
1603 core_tmr_release_req(se_cmd->se_tmr_req); 1603 core_tmr_release_req(se_cmd->se_tmr_req);
1604 return ret; 1604 return ret;
1605 } 1605 }
1606 1606
1607 ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); 1607 ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
1608 if (ret) { 1608 if (ret) {
1609 /* 1609 /*
1610 * For callback during failure handling, push this work off 1610 * For callback during failure handling, push this work off
1611 * to process context with TMR_LUN_DOES_NOT_EXIST status. 1611 * to process context with TMR_LUN_DOES_NOT_EXIST status.
1612 */ 1612 */
1613 INIT_WORK(&se_cmd->work, target_complete_tmr_failure); 1613 INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
1614 schedule_work(&se_cmd->work); 1614 schedule_work(&se_cmd->work);
1615 return 0; 1615 return 0;
1616 } 1616 }
1617 transport_generic_handle_tmr(se_cmd); 1617 transport_generic_handle_tmr(se_cmd);
1618 return 0; 1618 return 0;
1619 } 1619 }
1620 EXPORT_SYMBOL(target_submit_tmr); 1620 EXPORT_SYMBOL(target_submit_tmr);
1621 1621
1622 /* 1622 /*
1623 * If the cmd is active, request it to be stopped and sleep until it 1623 * If the cmd is active, request it to be stopped and sleep until it
1624 * has completed. 1624 * has completed.
1625 */ 1625 */
1626 bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) 1626 bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags)
1627 { 1627 {
1628 bool was_active = false; 1628 bool was_active = false;
1629 1629
1630 if (cmd->transport_state & CMD_T_BUSY) { 1630 if (cmd->transport_state & CMD_T_BUSY) {
1631 cmd->transport_state |= CMD_T_REQUEST_STOP; 1631 cmd->transport_state |= CMD_T_REQUEST_STOP;
1632 spin_unlock_irqrestore(&cmd->t_state_lock, *flags); 1632 spin_unlock_irqrestore(&cmd->t_state_lock, *flags);
1633 1633
1634 pr_debug("cmd %p waiting to complete\n", cmd); 1634 pr_debug("cmd %p waiting to complete\n", cmd);
1635 wait_for_completion(&cmd->task_stop_comp); 1635 wait_for_completion(&cmd->task_stop_comp);
1636 pr_debug("cmd %p stopped successfully\n", cmd); 1636 pr_debug("cmd %p stopped successfully\n", cmd);
1637 1637
1638 spin_lock_irqsave(&cmd->t_state_lock, *flags); 1638 spin_lock_irqsave(&cmd->t_state_lock, *flags);
1639 cmd->transport_state &= ~CMD_T_REQUEST_STOP; 1639 cmd->transport_state &= ~CMD_T_REQUEST_STOP;
1640 cmd->transport_state &= ~CMD_T_BUSY; 1640 cmd->transport_state &= ~CMD_T_BUSY;
1641 was_active = true; 1641 was_active = true;
1642 } 1642 }
1643 1643
1644 return was_active; 1644 return was_active;
1645 } 1645 }
1646 1646
1647 /* 1647 /*
1648 * Handle SAM-esque emulation for generic transport request failures. 1648 * Handle SAM-esque emulation for generic transport request failures.
1649 */ 1649 */
1650 void transport_generic_request_failure(struct se_cmd *cmd) 1650 void transport_generic_request_failure(struct se_cmd *cmd)
1651 { 1651 {
1652 int ret = 0; 1652 int ret = 0;
1653 1653
1654 pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" 1654 pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
1655 " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), 1655 " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd),
1656 cmd->t_task_cdb[0]); 1656 cmd->t_task_cdb[0]);
1657 pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", 1657 pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n",
1658 cmd->se_tfo->get_cmd_state(cmd), 1658 cmd->se_tfo->get_cmd_state(cmd),
1659 cmd->t_state, cmd->scsi_sense_reason); 1659 cmd->t_state, cmd->scsi_sense_reason);
1660 pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", 1660 pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
1661 (cmd->transport_state & CMD_T_ACTIVE) != 0, 1661 (cmd->transport_state & CMD_T_ACTIVE) != 0,
1662 (cmd->transport_state & CMD_T_STOP) != 0, 1662 (cmd->transport_state & CMD_T_STOP) != 0,
1663 (cmd->transport_state & CMD_T_SENT) != 0); 1663 (cmd->transport_state & CMD_T_SENT) != 0);
1664 1664
1665 /* 1665 /*
1666 * For SAM Task Attribute emulation for failed struct se_cmd 1666 * For SAM Task Attribute emulation for failed struct se_cmd
1667 */ 1667 */
1668 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) 1668 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
1669 transport_complete_task_attr(cmd); 1669 transport_complete_task_attr(cmd);
1670 1670
1671 switch (cmd->scsi_sense_reason) { 1671 switch (cmd->scsi_sense_reason) {
1672 case TCM_NON_EXISTENT_LUN: 1672 case TCM_NON_EXISTENT_LUN:
1673 case TCM_UNSUPPORTED_SCSI_OPCODE: 1673 case TCM_UNSUPPORTED_SCSI_OPCODE:
1674 case TCM_INVALID_CDB_FIELD: 1674 case TCM_INVALID_CDB_FIELD:
1675 case TCM_INVALID_PARAMETER_LIST: 1675 case TCM_INVALID_PARAMETER_LIST:
1676 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: 1676 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
1677 case TCM_UNKNOWN_MODE_PAGE: 1677 case TCM_UNKNOWN_MODE_PAGE:
1678 case TCM_WRITE_PROTECTED: 1678 case TCM_WRITE_PROTECTED:
1679 case TCM_ADDRESS_OUT_OF_RANGE: 1679 case TCM_ADDRESS_OUT_OF_RANGE:
1680 case TCM_CHECK_CONDITION_ABORT_CMD: 1680 case TCM_CHECK_CONDITION_ABORT_CMD:
1681 case TCM_CHECK_CONDITION_UNIT_ATTENTION: 1681 case TCM_CHECK_CONDITION_UNIT_ATTENTION:
1682 case TCM_CHECK_CONDITION_NOT_READY: 1682 case TCM_CHECK_CONDITION_NOT_READY:
1683 break; 1683 break;
1684 case TCM_RESERVATION_CONFLICT: 1684 case TCM_RESERVATION_CONFLICT:
1685 /* 1685 /*
1686 * No SENSE Data payload for this case, set SCSI Status 1686 * No SENSE Data payload for this case, set SCSI Status
1687 * and queue the response to $FABRIC_MOD. 1687 * and queue the response to $FABRIC_MOD.
1688 * 1688 *
1689 * Uses linux/include/scsi/scsi.h SAM status codes defs 1689 * Uses linux/include/scsi/scsi.h SAM status codes defs
1690 */ 1690 */
1691 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; 1691 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
1692 /* 1692 /*
1693 * For UA Interlock Code 11b, a RESERVATION CONFLICT will 1693 * For UA Interlock Code 11b, a RESERVATION CONFLICT will
1694 * establish a UNIT ATTENTION with PREVIOUS RESERVATION 1694 * establish a UNIT ATTENTION with PREVIOUS RESERVATION
1695 * CONFLICT STATUS. 1695 * CONFLICT STATUS.
1696 * 1696 *
1697 * See spc4r17, section 7.4.6 Control Mode Page, Table 349 1697 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
1698 */ 1698 */
1699 if (cmd->se_sess && 1699 if (cmd->se_sess &&
1700 cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) 1700 cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2)
1701 core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, 1701 core_scsi3_ua_allocate(cmd->se_sess->se_node_acl,
1702 cmd->orig_fe_lun, 0x2C, 1702 cmd->orig_fe_lun, 0x2C,
1703 ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); 1703 ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
1704 1704
1705 ret = cmd->se_tfo->queue_status(cmd); 1705 ret = cmd->se_tfo->queue_status(cmd);
1706 if (ret == -EAGAIN || ret == -ENOMEM) 1706 if (ret == -EAGAIN || ret == -ENOMEM)
1707 goto queue_full; 1707 goto queue_full;
1708 goto check_stop; 1708 goto check_stop;
1709 default: 1709 default:
1710 pr_err("Unknown transport error for CDB 0x%02x: %d\n", 1710 pr_err("Unknown transport error for CDB 0x%02x: %d\n",
1711 cmd->t_task_cdb[0], cmd->scsi_sense_reason); 1711 cmd->t_task_cdb[0], cmd->scsi_sense_reason);
1712 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1712 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1713 break; 1713 break;
1714 } 1714 }
1715 1715
1716 ret = transport_send_check_condition_and_sense(cmd, 1716 ret = transport_send_check_condition_and_sense(cmd,
1717 cmd->scsi_sense_reason, 0); 1717 cmd->scsi_sense_reason, 0);
1718 if (ret == -EAGAIN || ret == -ENOMEM) 1718 if (ret == -EAGAIN || ret == -ENOMEM)
1719 goto queue_full; 1719 goto queue_full;
1720 1720
1721 check_stop: 1721 check_stop:
1722 transport_lun_remove_cmd(cmd); 1722 transport_lun_remove_cmd(cmd);
1723 if (!transport_cmd_check_stop_to_fabric(cmd)) 1723 if (!transport_cmd_check_stop_to_fabric(cmd))
1724 ; 1724 ;
1725 return; 1725 return;
1726 1726
1727 queue_full: 1727 queue_full:
1728 cmd->t_state = TRANSPORT_COMPLETE_QF_OK; 1728 cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
1729 transport_handle_queue_full(cmd, cmd->se_dev); 1729 transport_handle_queue_full(cmd, cmd->se_dev);
1730 } 1730 }
1731 EXPORT_SYMBOL(transport_generic_request_failure); 1731 EXPORT_SYMBOL(transport_generic_request_failure);
1732 1732
1733 static void __target_execute_cmd(struct se_cmd *cmd) 1733 static void __target_execute_cmd(struct se_cmd *cmd)
1734 { 1734 {
1735 int error = 0; 1735 int error = 0;
1736 1736
1737 spin_lock_irq(&cmd->t_state_lock); 1737 spin_lock_irq(&cmd->t_state_lock);
1738 cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT); 1738 cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT);
1739 spin_unlock_irq(&cmd->t_state_lock); 1739 spin_unlock_irq(&cmd->t_state_lock);
1740 1740
1741 if (cmd->execute_cmd) 1741 if (cmd->execute_cmd)
1742 error = cmd->execute_cmd(cmd); 1742 error = cmd->execute_cmd(cmd);
1743 1743
1744 if (error) { 1744 if (error) {
1745 spin_lock_irq(&cmd->t_state_lock); 1745 spin_lock_irq(&cmd->t_state_lock);
1746 cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); 1746 cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT);
1747 spin_unlock_irq(&cmd->t_state_lock); 1747 spin_unlock_irq(&cmd->t_state_lock);
1748 1748
1749 transport_generic_request_failure(cmd); 1749 transport_generic_request_failure(cmd);
1750 } 1750 }
1751 } 1751 }
1752 1752
1753 void target_execute_cmd(struct se_cmd *cmd) 1753 void target_execute_cmd(struct se_cmd *cmd)
1754 { 1754 {
1755 struct se_device *dev = cmd->se_dev; 1755 struct se_device *dev = cmd->se_dev;
1756 1756
1757 /* 1757 /*
1758 * If the received CDB has aleady been aborted stop processing it here. 1758 * If the received CDB has aleady been aborted stop processing it here.
1759 */ 1759 */
1760 if (transport_check_aborted_status(cmd, 1)) 1760 if (transport_check_aborted_status(cmd, 1))
1761 return; 1761 return;
1762 1762
1763 /* 1763 /*
1764 * Determine if IOCTL context caller in requesting the stopping of this 1764 * Determine if IOCTL context caller in requesting the stopping of this
1765 * command for LUN shutdown purposes. 1765 * command for LUN shutdown purposes.
1766 */ 1766 */
1767 spin_lock_irq(&cmd->t_state_lock); 1767 spin_lock_irq(&cmd->t_state_lock);
1768 if (cmd->transport_state & CMD_T_LUN_STOP) { 1768 if (cmd->transport_state & CMD_T_LUN_STOP) {
1769 pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", 1769 pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
1770 __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); 1770 __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
1771 1771
1772 cmd->transport_state &= ~CMD_T_ACTIVE; 1772 cmd->transport_state &= ~CMD_T_ACTIVE;
1773 spin_unlock_irq(&cmd->t_state_lock); 1773 spin_unlock_irq(&cmd->t_state_lock);
1774 complete(&cmd->transport_lun_stop_comp); 1774 complete(&cmd->transport_lun_stop_comp);
1775 return; 1775 return;
1776 } 1776 }
1777 /* 1777 /*
1778 * Determine if frontend context caller is requesting the stopping of 1778 * Determine if frontend context caller is requesting the stopping of
1779 * this command for frontend exceptions. 1779 * this command for frontend exceptions.
1780 */ 1780 */
1781 if (cmd->transport_state & CMD_T_STOP) { 1781 if (cmd->transport_state & CMD_T_STOP) {
1782 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", 1782 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
1783 __func__, __LINE__, 1783 __func__, __LINE__,
1784 cmd->se_tfo->get_task_tag(cmd)); 1784 cmd->se_tfo->get_task_tag(cmd));
1785 1785
1786 spin_unlock_irq(&cmd->t_state_lock); 1786 spin_unlock_irq(&cmd->t_state_lock);
1787 complete(&cmd->t_transport_stop_comp); 1787 complete(&cmd->t_transport_stop_comp);
1788 return; 1788 return;
1789 } 1789 }
1790 1790
1791 cmd->t_state = TRANSPORT_PROCESSING; 1791 cmd->t_state = TRANSPORT_PROCESSING;
1792 spin_unlock_irq(&cmd->t_state_lock); 1792 spin_unlock_irq(&cmd->t_state_lock);
1793 1793
1794 if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) 1794 if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
1795 goto execute; 1795 goto execute;
1796 1796
1797 /* 1797 /*
1798 * Check for the existence of HEAD_OF_QUEUE, and if true return 1 1798 * Check for the existence of HEAD_OF_QUEUE, and if true return 1
1799 * to allow the passed struct se_cmd list of tasks to the front of the list. 1799 * to allow the passed struct se_cmd list of tasks to the front of the list.
1800 */ 1800 */
1801 switch (cmd->sam_task_attr) { 1801 switch (cmd->sam_task_attr) {
1802 case MSG_HEAD_TAG: 1802 case MSG_HEAD_TAG:
1803 pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " 1803 pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, "
1804 "se_ordered_id: %u\n", 1804 "se_ordered_id: %u\n",
1805 cmd->t_task_cdb[0], cmd->se_ordered_id); 1805 cmd->t_task_cdb[0], cmd->se_ordered_id);
1806 goto execute; 1806 goto execute;
1807 case MSG_ORDERED_TAG: 1807 case MSG_ORDERED_TAG:
1808 atomic_inc(&dev->dev_ordered_sync); 1808 atomic_inc(&dev->dev_ordered_sync);
1809 smp_mb__after_atomic_inc(); 1809 smp_mb__after_atomic_inc();
1810 1810
1811 pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " 1811 pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, "
1812 " se_ordered_id: %u\n", 1812 " se_ordered_id: %u\n",
1813 cmd->t_task_cdb[0], cmd->se_ordered_id); 1813 cmd->t_task_cdb[0], cmd->se_ordered_id);
1814 1814
1815 /* 1815 /*
1816 * Execute an ORDERED command if no other older commands 1816 * Execute an ORDERED command if no other older commands
1817 * exist that need to be completed first. 1817 * exist that need to be completed first.
1818 */ 1818 */
1819 if (!atomic_read(&dev->simple_cmds)) 1819 if (!atomic_read(&dev->simple_cmds))
1820 goto execute; 1820 goto execute;
1821 break; 1821 break;
1822 default: 1822 default:
1823 /* 1823 /*
1824 * For SIMPLE and UNTAGGED Task Attribute commands 1824 * For SIMPLE and UNTAGGED Task Attribute commands
1825 */ 1825 */
1826 atomic_inc(&dev->simple_cmds); 1826 atomic_inc(&dev->simple_cmds);
1827 smp_mb__after_atomic_inc(); 1827 smp_mb__after_atomic_inc();
1828 break; 1828 break;
1829 } 1829 }
1830 1830
1831 if (atomic_read(&dev->dev_ordered_sync) != 0) { 1831 if (atomic_read(&dev->dev_ordered_sync) != 0) {
1832 spin_lock(&dev->delayed_cmd_lock); 1832 spin_lock(&dev->delayed_cmd_lock);
1833 list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); 1833 list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list);
1834 spin_unlock(&dev->delayed_cmd_lock); 1834 spin_unlock(&dev->delayed_cmd_lock);
1835 1835
1836 pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" 1836 pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
1837 " delayed CMD list, se_ordered_id: %u\n", 1837 " delayed CMD list, se_ordered_id: %u\n",
1838 cmd->t_task_cdb[0], cmd->sam_task_attr, 1838 cmd->t_task_cdb[0], cmd->sam_task_attr,
1839 cmd->se_ordered_id); 1839 cmd->se_ordered_id);
1840 return; 1840 return;
1841 } 1841 }
1842 1842
1843 execute: 1843 execute:
1844 /* 1844 /*
1845 * Otherwise, no ORDERED task attributes exist.. 1845 * Otherwise, no ORDERED task attributes exist..
1846 */ 1846 */
1847 __target_execute_cmd(cmd); 1847 __target_execute_cmd(cmd);
1848 } 1848 }
1849 EXPORT_SYMBOL(target_execute_cmd); 1849 EXPORT_SYMBOL(target_execute_cmd);
1850 1850
1851 /* 1851 /*
1852 * Process all commands up to the last received ORDERED task attribute which 1852 * Process all commands up to the last received ORDERED task attribute which
1853 * requires another blocking boundary 1853 * requires another blocking boundary
1854 */ 1854 */
1855 static void target_restart_delayed_cmds(struct se_device *dev) 1855 static void target_restart_delayed_cmds(struct se_device *dev)
1856 { 1856 {
1857 for (;;) { 1857 for (;;) {
1858 struct se_cmd *cmd; 1858 struct se_cmd *cmd;
1859 1859
1860 spin_lock(&dev->delayed_cmd_lock); 1860 spin_lock(&dev->delayed_cmd_lock);
1861 if (list_empty(&dev->delayed_cmd_list)) { 1861 if (list_empty(&dev->delayed_cmd_list)) {
1862 spin_unlock(&dev->delayed_cmd_lock); 1862 spin_unlock(&dev->delayed_cmd_lock);
1863 break; 1863 break;
1864 } 1864 }
1865 1865
1866 cmd = list_entry(dev->delayed_cmd_list.next, 1866 cmd = list_entry(dev->delayed_cmd_list.next,
1867 struct se_cmd, se_delayed_node); 1867 struct se_cmd, se_delayed_node);
1868 list_del(&cmd->se_delayed_node); 1868 list_del(&cmd->se_delayed_node);
1869 spin_unlock(&dev->delayed_cmd_lock); 1869 spin_unlock(&dev->delayed_cmd_lock);
1870 1870
1871 __target_execute_cmd(cmd); 1871 __target_execute_cmd(cmd);
1872 1872
1873 if (cmd->sam_task_attr == MSG_ORDERED_TAG) 1873 if (cmd->sam_task_attr == MSG_ORDERED_TAG)
1874 break; 1874 break;
1875 } 1875 }
1876 } 1876 }
1877 1877
1878 /* 1878 /*
1879 * Called from I/O completion to determine which dormant/delayed 1879 * Called from I/O completion to determine which dormant/delayed
1880 * and ordered cmds need to have their tasks added to the execution queue. 1880 * and ordered cmds need to have their tasks added to the execution queue.
1881 */ 1881 */
1882 static void transport_complete_task_attr(struct se_cmd *cmd) 1882 static void transport_complete_task_attr(struct se_cmd *cmd)
1883 { 1883 {
1884 struct se_device *dev = cmd->se_dev; 1884 struct se_device *dev = cmd->se_dev;
1885 1885
1886 if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { 1886 if (cmd->sam_task_attr == MSG_SIMPLE_TAG) {
1887 atomic_dec(&dev->simple_cmds); 1887 atomic_dec(&dev->simple_cmds);
1888 smp_mb__after_atomic_dec(); 1888 smp_mb__after_atomic_dec();
1889 dev->dev_cur_ordered_id++; 1889 dev->dev_cur_ordered_id++;
1890 pr_debug("Incremented dev->dev_cur_ordered_id: %u for" 1890 pr_debug("Incremented dev->dev_cur_ordered_id: %u for"
1891 " SIMPLE: %u\n", dev->dev_cur_ordered_id, 1891 " SIMPLE: %u\n", dev->dev_cur_ordered_id,
1892 cmd->se_ordered_id); 1892 cmd->se_ordered_id);
1893 } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { 1893 } else if (cmd->sam_task_attr == MSG_HEAD_TAG) {
1894 dev->dev_cur_ordered_id++; 1894 dev->dev_cur_ordered_id++;
1895 pr_debug("Incremented dev_cur_ordered_id: %u for" 1895 pr_debug("Incremented dev_cur_ordered_id: %u for"
1896 " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, 1896 " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,
1897 cmd->se_ordered_id); 1897 cmd->se_ordered_id);
1898 } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { 1898 } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {
1899 atomic_dec(&dev->dev_ordered_sync); 1899 atomic_dec(&dev->dev_ordered_sync);
1900 smp_mb__after_atomic_dec(); 1900 smp_mb__after_atomic_dec();
1901 1901
1902 dev->dev_cur_ordered_id++; 1902 dev->dev_cur_ordered_id++;
1903 pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" 1903 pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:"
1904 " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); 1904 " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id);
1905 } 1905 }
1906 1906
1907 target_restart_delayed_cmds(dev); 1907 target_restart_delayed_cmds(dev);
1908 } 1908 }
1909 1909
1910 static void transport_complete_qf(struct se_cmd *cmd) 1910 static void transport_complete_qf(struct se_cmd *cmd)
1911 { 1911 {
1912 int ret = 0; 1912 int ret = 0;
1913 1913
1914 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) 1914 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
1915 transport_complete_task_attr(cmd); 1915 transport_complete_task_attr(cmd);
1916 1916
1917 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { 1917 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
1918 ret = cmd->se_tfo->queue_status(cmd); 1918 ret = cmd->se_tfo->queue_status(cmd);
1919 if (ret) 1919 if (ret)
1920 goto out; 1920 goto out;
1921 } 1921 }
1922 1922
1923 switch (cmd->data_direction) { 1923 switch (cmd->data_direction) {
1924 case DMA_FROM_DEVICE: 1924 case DMA_FROM_DEVICE:
1925 ret = cmd->se_tfo->queue_data_in(cmd); 1925 ret = cmd->se_tfo->queue_data_in(cmd);
1926 break; 1926 break;
1927 case DMA_TO_DEVICE: 1927 case DMA_TO_DEVICE:
1928 if (cmd->t_bidi_data_sg) { 1928 if (cmd->t_bidi_data_sg) {
1929 ret = cmd->se_tfo->queue_data_in(cmd); 1929 ret = cmd->se_tfo->queue_data_in(cmd);
1930 if (ret < 0) 1930 if (ret < 0)
1931 break; 1931 break;
1932 } 1932 }
1933 /* Fall through for DMA_TO_DEVICE */ 1933 /* Fall through for DMA_TO_DEVICE */
1934 case DMA_NONE: 1934 case DMA_NONE:
1935 ret = cmd->se_tfo->queue_status(cmd); 1935 ret = cmd->se_tfo->queue_status(cmd);
1936 break; 1936 break;
1937 default: 1937 default:
1938 break; 1938 break;
1939 } 1939 }
1940 1940
1941 out: 1941 out:
1942 if (ret < 0) { 1942 if (ret < 0) {
1943 transport_handle_queue_full(cmd, cmd->se_dev); 1943 transport_handle_queue_full(cmd, cmd->se_dev);
1944 return; 1944 return;
1945 } 1945 }
1946 transport_lun_remove_cmd(cmd); 1946 transport_lun_remove_cmd(cmd);
1947 transport_cmd_check_stop_to_fabric(cmd); 1947 transport_cmd_check_stop_to_fabric(cmd);
1948 } 1948 }
1949 1949
1950 static void transport_handle_queue_full( 1950 static void transport_handle_queue_full(
1951 struct se_cmd *cmd, 1951 struct se_cmd *cmd,
1952 struct se_device *dev) 1952 struct se_device *dev)
1953 { 1953 {
1954 spin_lock_irq(&dev->qf_cmd_lock); 1954 spin_lock_irq(&dev->qf_cmd_lock);
1955 list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); 1955 list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list);
1956 atomic_inc(&dev->dev_qf_count); 1956 atomic_inc(&dev->dev_qf_count);
1957 smp_mb__after_atomic_inc(); 1957 smp_mb__after_atomic_inc();
1958 spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); 1958 spin_unlock_irq(&cmd->se_dev->qf_cmd_lock);
1959 1959
1960 schedule_work(&cmd->se_dev->qf_work_queue); 1960 schedule_work(&cmd->se_dev->qf_work_queue);
1961 } 1961 }
1962 1962
1963 static void target_complete_ok_work(struct work_struct *work) 1963 static void target_complete_ok_work(struct work_struct *work)
1964 { 1964 {
1965 struct se_cmd *cmd = container_of(work, struct se_cmd, work); 1965 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
1966 int ret; 1966 int ret;
1967 1967
1968 /* 1968 /*
1969 * Check if we need to move delayed/dormant tasks from cmds on the 1969 * Check if we need to move delayed/dormant tasks from cmds on the
1970 * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task 1970 * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
1971 * Attribute. 1971 * Attribute.
1972 */ 1972 */
1973 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) 1973 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
1974 transport_complete_task_attr(cmd); 1974 transport_complete_task_attr(cmd);
1975 /* 1975 /*
1976 * Check to schedule QUEUE_FULL work, or execute an existing 1976 * Check to schedule QUEUE_FULL work, or execute an existing
1977 * cmd->transport_qf_callback() 1977 * cmd->transport_qf_callback()
1978 */ 1978 */
1979 if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) 1979 if (atomic_read(&cmd->se_dev->dev_qf_count) != 0)
1980 schedule_work(&cmd->se_dev->qf_work_queue); 1980 schedule_work(&cmd->se_dev->qf_work_queue);
1981 1981
1982 /* 1982 /*
1983 * Check if we need to send a sense buffer from 1983 * Check if we need to send a sense buffer from
1984 * the struct se_cmd in question. 1984 * the struct se_cmd in question.
1985 */ 1985 */
1986 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { 1986 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
1987 WARN_ON(!cmd->scsi_status); 1987 WARN_ON(!cmd->scsi_status);
1988 ret = transport_send_check_condition_and_sense( 1988 ret = transport_send_check_condition_and_sense(
1989 cmd, 0, 1); 1989 cmd, 0, 1);
1990 if (ret == -EAGAIN || ret == -ENOMEM) 1990 if (ret == -EAGAIN || ret == -ENOMEM)
1991 goto queue_full; 1991 goto queue_full;
1992 1992
1993 transport_lun_remove_cmd(cmd); 1993 transport_lun_remove_cmd(cmd);
1994 transport_cmd_check_stop_to_fabric(cmd); 1994 transport_cmd_check_stop_to_fabric(cmd);
1995 return; 1995 return;
1996 } 1996 }
1997 /* 1997 /*
1998 * Check for a callback, used by amongst other things 1998 * Check for a callback, used by amongst other things
1999 * XDWRITE_READ_10 emulation. 1999 * XDWRITE_READ_10 emulation.
2000 */ 2000 */
2001 if (cmd->transport_complete_callback) 2001 if (cmd->transport_complete_callback)
2002 cmd->transport_complete_callback(cmd); 2002 cmd->transport_complete_callback(cmd);
2003 2003
2004 switch (cmd->data_direction) { 2004 switch (cmd->data_direction) {
2005 case DMA_FROM_DEVICE: 2005 case DMA_FROM_DEVICE:
2006 spin_lock(&cmd->se_lun->lun_sep_lock); 2006 spin_lock(&cmd->se_lun->lun_sep_lock);
2007 if (cmd->se_lun->lun_sep) { 2007 if (cmd->se_lun->lun_sep) {
2008 cmd->se_lun->lun_sep->sep_stats.tx_data_octets += 2008 cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
2009 cmd->data_length; 2009 cmd->data_length;
2010 } 2010 }
2011 spin_unlock(&cmd->se_lun->lun_sep_lock); 2011 spin_unlock(&cmd->se_lun->lun_sep_lock);
2012 2012
2013 ret = cmd->se_tfo->queue_data_in(cmd); 2013 ret = cmd->se_tfo->queue_data_in(cmd);
2014 if (ret == -EAGAIN || ret == -ENOMEM) 2014 if (ret == -EAGAIN || ret == -ENOMEM)
2015 goto queue_full; 2015 goto queue_full;
2016 break; 2016 break;
2017 case DMA_TO_DEVICE: 2017 case DMA_TO_DEVICE:
2018 spin_lock(&cmd->se_lun->lun_sep_lock); 2018 spin_lock(&cmd->se_lun->lun_sep_lock);
2019 if (cmd->se_lun->lun_sep) { 2019 if (cmd->se_lun->lun_sep) {
2020 cmd->se_lun->lun_sep->sep_stats.rx_data_octets += 2020 cmd->se_lun->lun_sep->sep_stats.rx_data_octets +=
2021 cmd->data_length; 2021 cmd->data_length;
2022 } 2022 }
2023 spin_unlock(&cmd->se_lun->lun_sep_lock); 2023 spin_unlock(&cmd->se_lun->lun_sep_lock);
2024 /* 2024 /*
2025 * Check if we need to send READ payload for BIDI-COMMAND 2025 * Check if we need to send READ payload for BIDI-COMMAND
2026 */ 2026 */
2027 if (cmd->t_bidi_data_sg) { 2027 if (cmd->t_bidi_data_sg) {
2028 spin_lock(&cmd->se_lun->lun_sep_lock); 2028 spin_lock(&cmd->se_lun->lun_sep_lock);
2029 if (cmd->se_lun->lun_sep) { 2029 if (cmd->se_lun->lun_sep) {
2030 cmd->se_lun->lun_sep->sep_stats.tx_data_octets += 2030 cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
2031 cmd->data_length; 2031 cmd->data_length;
2032 } 2032 }
2033 spin_unlock(&cmd->se_lun->lun_sep_lock); 2033 spin_unlock(&cmd->se_lun->lun_sep_lock);
2034 ret = cmd->se_tfo->queue_data_in(cmd); 2034 ret = cmd->se_tfo->queue_data_in(cmd);
2035 if (ret == -EAGAIN || ret == -ENOMEM) 2035 if (ret == -EAGAIN || ret == -ENOMEM)
2036 goto queue_full; 2036 goto queue_full;
2037 break; 2037 break;
2038 } 2038 }
2039 /* Fall through for DMA_TO_DEVICE */ 2039 /* Fall through for DMA_TO_DEVICE */
2040 case DMA_NONE: 2040 case DMA_NONE:
2041 ret = cmd->se_tfo->queue_status(cmd); 2041 ret = cmd->se_tfo->queue_status(cmd);
2042 if (ret == -EAGAIN || ret == -ENOMEM) 2042 if (ret == -EAGAIN || ret == -ENOMEM)
2043 goto queue_full; 2043 goto queue_full;
2044 break; 2044 break;
2045 default: 2045 default:
2046 break; 2046 break;
2047 } 2047 }
2048 2048
2049 transport_lun_remove_cmd(cmd); 2049 transport_lun_remove_cmd(cmd);
2050 transport_cmd_check_stop_to_fabric(cmd); 2050 transport_cmd_check_stop_to_fabric(cmd);
2051 return; 2051 return;
2052 2052
2053 queue_full: 2053 queue_full:
2054 pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," 2054 pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p,"
2055 " data_direction: %d\n", cmd, cmd->data_direction); 2055 " data_direction: %d\n", cmd, cmd->data_direction);
2056 cmd->t_state = TRANSPORT_COMPLETE_QF_OK; 2056 cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
2057 transport_handle_queue_full(cmd, cmd->se_dev); 2057 transport_handle_queue_full(cmd, cmd->se_dev);
2058 } 2058 }
2059 2059
2060 static inline void transport_free_sgl(struct scatterlist *sgl, int nents) 2060 static inline void transport_free_sgl(struct scatterlist *sgl, int nents)
2061 { 2061 {
2062 struct scatterlist *sg; 2062 struct scatterlist *sg;
2063 int count; 2063 int count;
2064 2064
2065 for_each_sg(sgl, sg, nents, count) 2065 for_each_sg(sgl, sg, nents, count)
2066 __free_page(sg_page(sg)); 2066 __free_page(sg_page(sg));
2067 2067
2068 kfree(sgl); 2068 kfree(sgl);
2069 } 2069 }
2070 2070
2071 static inline void transport_free_pages(struct se_cmd *cmd) 2071 static inline void transport_free_pages(struct se_cmd *cmd)
2072 { 2072 {
2073 if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) 2073 if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)
2074 return; 2074 return;
2075 2075
2076 transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); 2076 transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents);
2077 cmd->t_data_sg = NULL; 2077 cmd->t_data_sg = NULL;
2078 cmd->t_data_nents = 0; 2078 cmd->t_data_nents = 0;
2079 2079
2080 transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); 2080 transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
2081 cmd->t_bidi_data_sg = NULL; 2081 cmd->t_bidi_data_sg = NULL;
2082 cmd->t_bidi_data_nents = 0; 2082 cmd->t_bidi_data_nents = 0;
2083 } 2083 }
2084 2084
2085 /** 2085 /**
2086 * transport_release_cmd - free a command 2086 * transport_release_cmd - free a command
2087 * @cmd: command to free 2087 * @cmd: command to free
2088 * 2088 *
2089 * This routine unconditionally frees a command, and reference counting 2089 * This routine unconditionally frees a command, and reference counting
2090 * or list removal must be done in the caller. 2090 * or list removal must be done in the caller.
2091 */ 2091 */
2092 static void transport_release_cmd(struct se_cmd *cmd) 2092 static void transport_release_cmd(struct se_cmd *cmd)
2093 { 2093 {
2094 BUG_ON(!cmd->se_tfo); 2094 BUG_ON(!cmd->se_tfo);
2095 2095
2096 if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) 2096 if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
2097 core_tmr_release_req(cmd->se_tmr_req); 2097 core_tmr_release_req(cmd->se_tmr_req);
2098 if (cmd->t_task_cdb != cmd->__t_task_cdb) 2098 if (cmd->t_task_cdb != cmd->__t_task_cdb)
2099 kfree(cmd->t_task_cdb); 2099 kfree(cmd->t_task_cdb);
2100 /* 2100 /*
2101 * If this cmd has been setup with target_get_sess_cmd(), drop 2101 * If this cmd has been setup with target_get_sess_cmd(), drop
2102 * the kref and call ->release_cmd() in kref callback. 2102 * the kref and call ->release_cmd() in kref callback.
2103 */ 2103 */
2104 if (cmd->check_release != 0) { 2104 if (cmd->check_release != 0) {
2105 target_put_sess_cmd(cmd->se_sess, cmd); 2105 target_put_sess_cmd(cmd->se_sess, cmd);
2106 return; 2106 return;
2107 } 2107 }
2108 cmd->se_tfo->release_cmd(cmd); 2108 cmd->se_tfo->release_cmd(cmd);
2109 } 2109 }
2110 2110
2111 /** 2111 /**
2112 * transport_put_cmd - release a reference to a command 2112 * transport_put_cmd - release a reference to a command
2113 * @cmd: command to release 2113 * @cmd: command to release
2114 * 2114 *
2115 * This routine releases our reference to the command and frees it if possible. 2115 * This routine releases our reference to the command and frees it if possible.
2116 */ 2116 */
2117 static void transport_put_cmd(struct se_cmd *cmd) 2117 static void transport_put_cmd(struct se_cmd *cmd)
2118 { 2118 {
2119 unsigned long flags; 2119 unsigned long flags;
2120 2120
2121 spin_lock_irqsave(&cmd->t_state_lock, flags); 2121 spin_lock_irqsave(&cmd->t_state_lock, flags);
2122 if (atomic_read(&cmd->t_fe_count)) { 2122 if (atomic_read(&cmd->t_fe_count)) {
2123 if (!atomic_dec_and_test(&cmd->t_fe_count)) 2123 if (!atomic_dec_and_test(&cmd->t_fe_count))
2124 goto out_busy; 2124 goto out_busy;
2125 } 2125 }
2126 2126
2127 if (cmd->transport_state & CMD_T_DEV_ACTIVE) { 2127 if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
2128 cmd->transport_state &= ~CMD_T_DEV_ACTIVE; 2128 cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
2129 target_remove_from_state_list(cmd); 2129 target_remove_from_state_list(cmd);
2130 } 2130 }
2131 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2131 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2132 2132
2133 transport_free_pages(cmd); 2133 transport_free_pages(cmd);
2134 transport_release_cmd(cmd); 2134 transport_release_cmd(cmd);
2135 return; 2135 return;
2136 out_busy: 2136 out_busy:
2137 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2137 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2138 } 2138 }
2139 2139
2140 /* 2140 /*
2141 * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of 2141 * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of
2142 * allocating in the core. 2142 * allocating in the core.
2143 * @cmd: Associated se_cmd descriptor 2143 * @cmd: Associated se_cmd descriptor
2144 * @mem: SGL style memory for TCM WRITE / READ 2144 * @mem: SGL style memory for TCM WRITE / READ
2145 * @sg_mem_num: Number of SGL elements 2145 * @sg_mem_num: Number of SGL elements
2146 * @mem_bidi_in: SGL style memory for TCM BIDI READ 2146 * @mem_bidi_in: SGL style memory for TCM BIDI READ
2147 * @sg_mem_bidi_num: Number of BIDI READ SGL elements 2147 * @sg_mem_bidi_num: Number of BIDI READ SGL elements
2148 * 2148 *
2149 * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage 2149 * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage
2150 * of parameters. 2150 * of parameters.
2151 */ 2151 */
2152 int transport_generic_map_mem_to_cmd( 2152 int transport_generic_map_mem_to_cmd(
2153 struct se_cmd *cmd, 2153 struct se_cmd *cmd,
2154 struct scatterlist *sgl, 2154 struct scatterlist *sgl,
2155 u32 sgl_count, 2155 u32 sgl_count,
2156 struct scatterlist *sgl_bidi, 2156 struct scatterlist *sgl_bidi,
2157 u32 sgl_bidi_count) 2157 u32 sgl_bidi_count)
2158 { 2158 {
2159 if (!sgl || !sgl_count) 2159 if (!sgl || !sgl_count)
2160 return 0; 2160 return 0;
2161 2161
2162 /* 2162 /*
2163 * Reject SCSI data overflow with map_mem_to_cmd() as incoming 2163 * Reject SCSI data overflow with map_mem_to_cmd() as incoming
2164 * scatterlists already have been set to follow what the fabric 2164 * scatterlists already have been set to follow what the fabric
2165 * passes for the original expected data transfer length. 2165 * passes for the original expected data transfer length.
2166 */ 2166 */
2167 if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 2167 if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2168 pr_warn("Rejecting SCSI DATA overflow for fabric using" 2168 pr_warn("Rejecting SCSI DATA overflow for fabric using"
2169 " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); 2169 " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
2170 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 2170 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
2171 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 2171 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
2172 return -EINVAL; 2172 return -EINVAL;
2173 } 2173 }
2174 2174
2175 cmd->t_data_sg = sgl; 2175 cmd->t_data_sg = sgl;
2176 cmd->t_data_nents = sgl_count; 2176 cmd->t_data_nents = sgl_count;
2177 2177
2178 if (sgl_bidi && sgl_bidi_count) { 2178 if (sgl_bidi && sgl_bidi_count) {
2179 cmd->t_bidi_data_sg = sgl_bidi; 2179 cmd->t_bidi_data_sg = sgl_bidi;
2180 cmd->t_bidi_data_nents = sgl_bidi_count; 2180 cmd->t_bidi_data_nents = sgl_bidi_count;
2181 } 2181 }
2182 cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 2182 cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
2183 return 0; 2183 return 0;
2184 } 2184 }
2185 EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); 2185 EXPORT_SYMBOL(transport_generic_map_mem_to_cmd);
2186 2186
2187 void *transport_kmap_data_sg(struct se_cmd *cmd) 2187 void *transport_kmap_data_sg(struct se_cmd *cmd)
2188 { 2188 {
2189 struct scatterlist *sg = cmd->t_data_sg; 2189 struct scatterlist *sg = cmd->t_data_sg;
2190 struct page **pages; 2190 struct page **pages;
2191 int i; 2191 int i;
2192 2192
2193 BUG_ON(!sg); 2193 BUG_ON(!sg);
2194 /* 2194 /*
2195 * We need to take into account a possible offset here for fabrics like 2195 * We need to take into account a possible offset here for fabrics like
2196 * tcm_loop who may be using a contig buffer from the SCSI midlayer for 2196 * tcm_loop who may be using a contig buffer from the SCSI midlayer for
2197 * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() 2197 * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd()
2198 */ 2198 */
2199 if (!cmd->t_data_nents) 2199 if (!cmd->t_data_nents)
2200 return NULL; 2200 return NULL;
2201 else if (cmd->t_data_nents == 1) 2201 else if (cmd->t_data_nents == 1)
2202 return kmap(sg_page(sg)) + sg->offset; 2202 return kmap(sg_page(sg)) + sg->offset;
2203 2203
2204 /* >1 page. use vmap */ 2204 /* >1 page. use vmap */
2205 pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); 2205 pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL);
2206 if (!pages) 2206 if (!pages)
2207 return NULL; 2207 return NULL;
2208 2208
2209 /* convert sg[] to pages[] */ 2209 /* convert sg[] to pages[] */
2210 for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { 2210 for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) {
2211 pages[i] = sg_page(sg); 2211 pages[i] = sg_page(sg);
2212 } 2212 }
2213 2213
2214 cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); 2214 cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL);
2215 kfree(pages); 2215 kfree(pages);
2216 if (!cmd->t_data_vmap) 2216 if (!cmd->t_data_vmap)
2217 return NULL; 2217 return NULL;
2218 2218
2219 return cmd->t_data_vmap + cmd->t_data_sg[0].offset; 2219 return cmd->t_data_vmap + cmd->t_data_sg[0].offset;
2220 } 2220 }
2221 EXPORT_SYMBOL(transport_kmap_data_sg); 2221 EXPORT_SYMBOL(transport_kmap_data_sg);
2222 2222
2223 void transport_kunmap_data_sg(struct se_cmd *cmd) 2223 void transport_kunmap_data_sg(struct se_cmd *cmd)
2224 { 2224 {
2225 if (!cmd->t_data_nents) { 2225 if (!cmd->t_data_nents) {
2226 return; 2226 return;
2227 } else if (cmd->t_data_nents == 1) { 2227 } else if (cmd->t_data_nents == 1) {
2228 kunmap(sg_page(cmd->t_data_sg)); 2228 kunmap(sg_page(cmd->t_data_sg));
2229 return; 2229 return;
2230 } 2230 }
2231 2231
2232 vunmap(cmd->t_data_vmap); 2232 vunmap(cmd->t_data_vmap);
2233 cmd->t_data_vmap = NULL; 2233 cmd->t_data_vmap = NULL;
2234 } 2234 }
2235 EXPORT_SYMBOL(transport_kunmap_data_sg); 2235 EXPORT_SYMBOL(transport_kunmap_data_sg);
2236 2236
2237 static int 2237 static int
2238 transport_generic_get_mem(struct se_cmd *cmd) 2238 transport_generic_get_mem(struct se_cmd *cmd)
2239 { 2239 {
2240 u32 length = cmd->data_length; 2240 u32 length = cmd->data_length;
2241 unsigned int nents; 2241 unsigned int nents;
2242 struct page *page; 2242 struct page *page;
2243 gfp_t zero_flag; 2243 gfp_t zero_flag;
2244 int i = 0; 2244 int i = 0;
2245 2245
2246 nents = DIV_ROUND_UP(length, PAGE_SIZE); 2246 nents = DIV_ROUND_UP(length, PAGE_SIZE);
2247 cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); 2247 cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL);
2248 if (!cmd->t_data_sg) 2248 if (!cmd->t_data_sg)
2249 return -ENOMEM; 2249 return -ENOMEM;
2250 2250
2251 cmd->t_data_nents = nents; 2251 cmd->t_data_nents = nents;
2252 sg_init_table(cmd->t_data_sg, nents); 2252 sg_init_table(cmd->t_data_sg, nents);
2253 2253
2254 zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO; 2254 zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO;
2255 2255
2256 while (length) { 2256 while (length) {
2257 u32 page_len = min_t(u32, length, PAGE_SIZE); 2257 u32 page_len = min_t(u32, length, PAGE_SIZE);
2258 page = alloc_page(GFP_KERNEL | zero_flag); 2258 page = alloc_page(GFP_KERNEL | zero_flag);
2259 if (!page) 2259 if (!page)
2260 goto out; 2260 goto out;
2261 2261
2262 sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); 2262 sg_set_page(&cmd->t_data_sg[i], page, page_len, 0);
2263 length -= page_len; 2263 length -= page_len;
2264 i++; 2264 i++;
2265 } 2265 }
2266 return 0; 2266 return 0;
2267 2267
2268 out: 2268 out:
2269 while (i > 0) { 2269 while (i > 0) {
2270 i--; 2270 i--;
2271 __free_page(sg_page(&cmd->t_data_sg[i])); 2271 __free_page(sg_page(&cmd->t_data_sg[i]));
2272 } 2272 }
2273 kfree(cmd->t_data_sg); 2273 kfree(cmd->t_data_sg);
2274 cmd->t_data_sg = NULL; 2274 cmd->t_data_sg = NULL;
2275 return -ENOMEM; 2275 return -ENOMEM;
2276 } 2276 }
2277 2277
2278 /* 2278 /*
2279 * Allocate any required resources to execute the command. For writes we 2279 * Allocate any required resources to execute the command. For writes we
2280 * might not have the payload yet, so notify the fabric via a call to 2280 * might not have the payload yet, so notify the fabric via a call to
2281 * ->write_pending instead. Otherwise place it on the execution queue. 2281 * ->write_pending instead. Otherwise place it on the execution queue.
2282 */ 2282 */
2283 int transport_generic_new_cmd(struct se_cmd *cmd) 2283 int transport_generic_new_cmd(struct se_cmd *cmd)
2284 { 2284 {
2285 int ret = 0; 2285 int ret = 0;
2286 2286
2287 /* 2287 /*
2288 * Determine is the TCM fabric module has already allocated physical 2288 * Determine is the TCM fabric module has already allocated physical
2289 * memory, and is directly calling transport_generic_map_mem_to_cmd() 2289 * memory, and is directly calling transport_generic_map_mem_to_cmd()
2290 * beforehand. 2290 * beforehand.
2291 */ 2291 */
2292 if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && 2292 if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) &&
2293 cmd->data_length) { 2293 cmd->data_length) {
2294 ret = transport_generic_get_mem(cmd); 2294 ret = transport_generic_get_mem(cmd);
2295 if (ret < 0) 2295 if (ret < 0)
2296 goto out_fail; 2296 goto out_fail;
2297 } 2297 }
2298 /* 2298 /*
2299 * If this command doesn't have any payload and we don't have to call 2299 * If this command doesn't have any payload and we don't have to call
2300 * into the fabric for data transfers, go ahead and complete it right 2300 * into the fabric for data transfers, go ahead and complete it right
2301 * away. 2301 * away.
2302 */ 2302 */
2303 if (!cmd->data_length) { 2303 if (!cmd->data_length &&
2304 (cmd->se_dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV ||
2305 cmd->t_task_cdb[0] == REPORT_LUNS) {
2304 spin_lock_irq(&cmd->t_state_lock); 2306 spin_lock_irq(&cmd->t_state_lock);
2305 cmd->t_state = TRANSPORT_COMPLETE; 2307 cmd->t_state = TRANSPORT_COMPLETE;
2306 cmd->transport_state |= CMD_T_ACTIVE; 2308 cmd->transport_state |= CMD_T_ACTIVE;
2307 spin_unlock_irq(&cmd->t_state_lock); 2309 spin_unlock_irq(&cmd->t_state_lock);
2308 2310
2309 if (cmd->t_task_cdb[0] == REQUEST_SENSE) { 2311 if (cmd->t_task_cdb[0] == REQUEST_SENSE) {
2310 u8 ua_asc = 0, ua_ascq = 0; 2312 u8 ua_asc = 0, ua_ascq = 0;
2311 2313
2312 core_scsi3_ua_clear_for_request_sense(cmd, 2314 core_scsi3_ua_clear_for_request_sense(cmd,
2313 &ua_asc, &ua_ascq); 2315 &ua_asc, &ua_ascq);
2314 } 2316 }
2315 2317
2316 INIT_WORK(&cmd->work, target_complete_ok_work); 2318 INIT_WORK(&cmd->work, target_complete_ok_work);
2317 queue_work(target_completion_wq, &cmd->work); 2319 queue_work(target_completion_wq, &cmd->work);
2318 return 0; 2320 return 0;
2319 } 2321 }
2320 2322
2321 atomic_inc(&cmd->t_fe_count); 2323 atomic_inc(&cmd->t_fe_count);
2322 2324
2323 /* 2325 /*
2324 * If this command is not a write we can execute it right here, 2326 * If this command is not a write we can execute it right here,
2325 * for write buffers we need to notify the fabric driver first 2327 * for write buffers we need to notify the fabric driver first
2326 * and let it call back once the write buffers are ready. 2328 * and let it call back once the write buffers are ready.
2327 */ 2329 */
2328 target_add_to_state_list(cmd); 2330 target_add_to_state_list(cmd);
2329 if (cmd->data_direction != DMA_TO_DEVICE) { 2331 if (cmd->data_direction != DMA_TO_DEVICE) {
2330 target_execute_cmd(cmd); 2332 target_execute_cmd(cmd);
2331 return 0; 2333 return 0;
2332 } 2334 }
2333 2335
2334 spin_lock_irq(&cmd->t_state_lock); 2336 spin_lock_irq(&cmd->t_state_lock);
2335 cmd->t_state = TRANSPORT_WRITE_PENDING; 2337 cmd->t_state = TRANSPORT_WRITE_PENDING;
2336 spin_unlock_irq(&cmd->t_state_lock); 2338 spin_unlock_irq(&cmd->t_state_lock);
2337 2339
2338 transport_cmd_check_stop(cmd, false); 2340 transport_cmd_check_stop(cmd, false);
2339 2341
2340 ret = cmd->se_tfo->write_pending(cmd); 2342 ret = cmd->se_tfo->write_pending(cmd);
2341 if (ret == -EAGAIN || ret == -ENOMEM) 2343 if (ret == -EAGAIN || ret == -ENOMEM)
2342 goto queue_full; 2344 goto queue_full;
2343 2345
2344 if (ret < 0) 2346 if (ret < 0)
2345 return ret; 2347 return ret;
2346 return 1; 2348 return 1;
2347 2349
2348 out_fail: 2350 out_fail:
2349 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 2351 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
2350 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2352 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2351 return -EINVAL; 2353 return -EINVAL;
2352 queue_full: 2354 queue_full:
2353 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); 2355 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);
2354 cmd->t_state = TRANSPORT_COMPLETE_QF_WP; 2356 cmd->t_state = TRANSPORT_COMPLETE_QF_WP;
2355 transport_handle_queue_full(cmd, cmd->se_dev); 2357 transport_handle_queue_full(cmd, cmd->se_dev);
2356 return 0; 2358 return 0;
2357 } 2359 }
2358 EXPORT_SYMBOL(transport_generic_new_cmd); 2360 EXPORT_SYMBOL(transport_generic_new_cmd);
2359 2361
2360 static void transport_write_pending_qf(struct se_cmd *cmd) 2362 static void transport_write_pending_qf(struct se_cmd *cmd)
2361 { 2363 {
2362 int ret; 2364 int ret;
2363 2365
2364 ret = cmd->se_tfo->write_pending(cmd); 2366 ret = cmd->se_tfo->write_pending(cmd);
2365 if (ret == -EAGAIN || ret == -ENOMEM) { 2367 if (ret == -EAGAIN || ret == -ENOMEM) {
2366 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", 2368 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n",
2367 cmd); 2369 cmd);
2368 transport_handle_queue_full(cmd, cmd->se_dev); 2370 transport_handle_queue_full(cmd, cmd->se_dev);
2369 } 2371 }
2370 } 2372 }
2371 2373
2372 void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) 2374 void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
2373 { 2375 {
2374 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { 2376 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) {
2375 if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) 2377 if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
2376 transport_wait_for_tasks(cmd); 2378 transport_wait_for_tasks(cmd);
2377 2379
2378 transport_release_cmd(cmd); 2380 transport_release_cmd(cmd);
2379 } else { 2381 } else {
2380 if (wait_for_tasks) 2382 if (wait_for_tasks)
2381 transport_wait_for_tasks(cmd); 2383 transport_wait_for_tasks(cmd);
2382 2384
2383 core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); 2385 core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd);
2384 2386
2385 if (cmd->se_lun) 2387 if (cmd->se_lun)
2386 transport_lun_remove_cmd(cmd); 2388 transport_lun_remove_cmd(cmd);
2387 2389
2388 transport_put_cmd(cmd); 2390 transport_put_cmd(cmd);
2389 } 2391 }
2390 } 2392 }
2391 EXPORT_SYMBOL(transport_generic_free_cmd); 2393 EXPORT_SYMBOL(transport_generic_free_cmd);
2392 2394
2393 /* target_get_sess_cmd - Add command to active ->sess_cmd_list 2395 /* target_get_sess_cmd - Add command to active ->sess_cmd_list
2394 * @se_sess: session to reference 2396 * @se_sess: session to reference
2395 * @se_cmd: command descriptor to add 2397 * @se_cmd: command descriptor to add
2396 * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() 2398 * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd()
2397 */ 2399 */
2398 static int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, 2400 static int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd,
2399 bool ack_kref) 2401 bool ack_kref)
2400 { 2402 {
2401 unsigned long flags; 2403 unsigned long flags;
2402 int ret = 0; 2404 int ret = 0;
2403 2405
2404 kref_init(&se_cmd->cmd_kref); 2406 kref_init(&se_cmd->cmd_kref);
2405 /* 2407 /*
2406 * Add a second kref if the fabric caller is expecting to handle 2408 * Add a second kref if the fabric caller is expecting to handle
2407 * fabric acknowledgement that requires two target_put_sess_cmd() 2409 * fabric acknowledgement that requires two target_put_sess_cmd()
2408 * invocations before se_cmd descriptor release. 2410 * invocations before se_cmd descriptor release.
2409 */ 2411 */
2410 if (ack_kref == true) { 2412 if (ack_kref == true) {
2411 kref_get(&se_cmd->cmd_kref); 2413 kref_get(&se_cmd->cmd_kref);
2412 se_cmd->se_cmd_flags |= SCF_ACK_KREF; 2414 se_cmd->se_cmd_flags |= SCF_ACK_KREF;
2413 } 2415 }
2414 2416
2415 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); 2417 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
2416 if (se_sess->sess_tearing_down) { 2418 if (se_sess->sess_tearing_down) {
2417 ret = -ESHUTDOWN; 2419 ret = -ESHUTDOWN;
2418 goto out; 2420 goto out;
2419 } 2421 }
2420 list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); 2422 list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
2421 se_cmd->check_release = 1; 2423 se_cmd->check_release = 1;
2422 2424
2423 out: 2425 out:
2424 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 2426 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2425 return ret; 2427 return ret;
2426 } 2428 }
2427 2429
2428 static void target_release_cmd_kref(struct kref *kref) 2430 static void target_release_cmd_kref(struct kref *kref)
2429 { 2431 {
2430 struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); 2432 struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref);
2431 struct se_session *se_sess = se_cmd->se_sess; 2433 struct se_session *se_sess = se_cmd->se_sess;
2432 unsigned long flags; 2434 unsigned long flags;
2433 2435
2434 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); 2436 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
2435 if (list_empty(&se_cmd->se_cmd_list)) { 2437 if (list_empty(&se_cmd->se_cmd_list)) {
2436 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 2438 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2437 se_cmd->se_tfo->release_cmd(se_cmd); 2439 se_cmd->se_tfo->release_cmd(se_cmd);
2438 return; 2440 return;
2439 } 2441 }
2440 if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { 2442 if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {
2441 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 2443 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2442 complete(&se_cmd->cmd_wait_comp); 2444 complete(&se_cmd->cmd_wait_comp);
2443 return; 2445 return;
2444 } 2446 }
2445 list_del(&se_cmd->se_cmd_list); 2447 list_del(&se_cmd->se_cmd_list);
2446 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 2448 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2447 2449
2448 se_cmd->se_tfo->release_cmd(se_cmd); 2450 se_cmd->se_tfo->release_cmd(se_cmd);
2449 } 2451 }
2450 2452
2451 /* target_put_sess_cmd - Check for active I/O shutdown via kref_put 2453 /* target_put_sess_cmd - Check for active I/O shutdown via kref_put
2452 * @se_sess: session to reference 2454 * @se_sess: session to reference
2453 * @se_cmd: command descriptor to drop 2455 * @se_cmd: command descriptor to drop
2454 */ 2456 */
2455 int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) 2457 int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
2456 { 2458 {
2457 return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); 2459 return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref);
2458 } 2460 }
2459 EXPORT_SYMBOL(target_put_sess_cmd); 2461 EXPORT_SYMBOL(target_put_sess_cmd);
2460 2462
2461 /* target_sess_cmd_list_set_waiting - Flag all commands in 2463 /* target_sess_cmd_list_set_waiting - Flag all commands in
2462 * sess_cmd_list to complete cmd_wait_comp. Set 2464 * sess_cmd_list to complete cmd_wait_comp. Set
2463 * sess_tearing_down so no more commands are queued. 2465 * sess_tearing_down so no more commands are queued.
2464 * @se_sess: session to flag 2466 * @se_sess: session to flag
2465 */ 2467 */
2466 void target_sess_cmd_list_set_waiting(struct se_session *se_sess) 2468 void target_sess_cmd_list_set_waiting(struct se_session *se_sess)
2467 { 2469 {
2468 struct se_cmd *se_cmd; 2470 struct se_cmd *se_cmd;
2469 unsigned long flags; 2471 unsigned long flags;
2470 2472
2471 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); 2473 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
2472 2474
2473 WARN_ON(se_sess->sess_tearing_down); 2475 WARN_ON(se_sess->sess_tearing_down);
2474 se_sess->sess_tearing_down = 1; 2476 se_sess->sess_tearing_down = 1;
2475 2477
2476 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) 2478 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list)
2477 se_cmd->cmd_wait_set = 1; 2479 se_cmd->cmd_wait_set = 1;
2478 2480
2479 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 2481 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2480 } 2482 }
2481 EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); 2483 EXPORT_SYMBOL(target_sess_cmd_list_set_waiting);
2482 2484
2483 /* target_wait_for_sess_cmds - Wait for outstanding descriptors 2485 /* target_wait_for_sess_cmds - Wait for outstanding descriptors
2484 * @se_sess: session to wait for active I/O 2486 * @se_sess: session to wait for active I/O
2485 * @wait_for_tasks: Make extra transport_wait_for_tasks call 2487 * @wait_for_tasks: Make extra transport_wait_for_tasks call
2486 */ 2488 */
2487 void target_wait_for_sess_cmds( 2489 void target_wait_for_sess_cmds(
2488 struct se_session *se_sess, 2490 struct se_session *se_sess,
2489 int wait_for_tasks) 2491 int wait_for_tasks)
2490 { 2492 {
2491 struct se_cmd *se_cmd, *tmp_cmd; 2493 struct se_cmd *se_cmd, *tmp_cmd;
2492 bool rc = false; 2494 bool rc = false;
2493 2495
2494 list_for_each_entry_safe(se_cmd, tmp_cmd, 2496 list_for_each_entry_safe(se_cmd, tmp_cmd,
2495 &se_sess->sess_cmd_list, se_cmd_list) { 2497 &se_sess->sess_cmd_list, se_cmd_list) {
2496 list_del(&se_cmd->se_cmd_list); 2498 list_del(&se_cmd->se_cmd_list);
2497 2499
2498 pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" 2500 pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
2499 " %d\n", se_cmd, se_cmd->t_state, 2501 " %d\n", se_cmd, se_cmd->t_state,
2500 se_cmd->se_tfo->get_cmd_state(se_cmd)); 2502 se_cmd->se_tfo->get_cmd_state(se_cmd));
2501 2503
2502 if (wait_for_tasks) { 2504 if (wait_for_tasks) {
2503 pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," 2505 pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d,"
2504 " fabric state: %d\n", se_cmd, se_cmd->t_state, 2506 " fabric state: %d\n", se_cmd, se_cmd->t_state,
2505 se_cmd->se_tfo->get_cmd_state(se_cmd)); 2507 se_cmd->se_tfo->get_cmd_state(se_cmd));
2506 2508
2507 rc = transport_wait_for_tasks(se_cmd); 2509 rc = transport_wait_for_tasks(se_cmd);
2508 2510
2509 pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," 2511 pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d,"
2510 " fabric state: %d\n", se_cmd, se_cmd->t_state, 2512 " fabric state: %d\n", se_cmd, se_cmd->t_state,
2511 se_cmd->se_tfo->get_cmd_state(se_cmd)); 2513 se_cmd->se_tfo->get_cmd_state(se_cmd));
2512 } 2514 }
2513 2515
2514 if (!rc) { 2516 if (!rc) {
2515 wait_for_completion(&se_cmd->cmd_wait_comp); 2517 wait_for_completion(&se_cmd->cmd_wait_comp);
2516 pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" 2518 pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
2517 " fabric state: %d\n", se_cmd, se_cmd->t_state, 2519 " fabric state: %d\n", se_cmd, se_cmd->t_state,
2518 se_cmd->se_tfo->get_cmd_state(se_cmd)); 2520 se_cmd->se_tfo->get_cmd_state(se_cmd));
2519 } 2521 }
2520 2522
2521 se_cmd->se_tfo->release_cmd(se_cmd); 2523 se_cmd->se_tfo->release_cmd(se_cmd);
2522 } 2524 }
2523 } 2525 }
2524 EXPORT_SYMBOL(target_wait_for_sess_cmds); 2526 EXPORT_SYMBOL(target_wait_for_sess_cmds);
2525 2527
2526 /* transport_lun_wait_for_tasks(): 2528 /* transport_lun_wait_for_tasks():
2527 * 2529 *
2528 * Called from ConfigFS context to stop the passed struct se_cmd to allow 2530 * Called from ConfigFS context to stop the passed struct se_cmd to allow
2529 * an struct se_lun to be successfully shutdown. 2531 * an struct se_lun to be successfully shutdown.
2530 */ 2532 */
2531 static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) 2533 static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun)
2532 { 2534 {
2533 unsigned long flags; 2535 unsigned long flags;
2534 int ret = 0; 2536 int ret = 0;
2535 2537
2536 /* 2538 /*
2537 * If the frontend has already requested this struct se_cmd to 2539 * If the frontend has already requested this struct se_cmd to
2538 * be stopped, we can safely ignore this struct se_cmd. 2540 * be stopped, we can safely ignore this struct se_cmd.
2539 */ 2541 */
2540 spin_lock_irqsave(&cmd->t_state_lock, flags); 2542 spin_lock_irqsave(&cmd->t_state_lock, flags);
2541 if (cmd->transport_state & CMD_T_STOP) { 2543 if (cmd->transport_state & CMD_T_STOP) {
2542 cmd->transport_state &= ~CMD_T_LUN_STOP; 2544 cmd->transport_state &= ~CMD_T_LUN_STOP;
2543 2545
2544 pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", 2546 pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n",
2545 cmd->se_tfo->get_task_tag(cmd)); 2547 cmd->se_tfo->get_task_tag(cmd));
2546 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2548 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2547 transport_cmd_check_stop(cmd, false); 2549 transport_cmd_check_stop(cmd, false);
2548 return -EPERM; 2550 return -EPERM;
2549 } 2551 }
2550 cmd->transport_state |= CMD_T_LUN_FE_STOP; 2552 cmd->transport_state |= CMD_T_LUN_FE_STOP;
2551 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2553 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2552 2554
2553 // XXX: audit task_flags checks. 2555 // XXX: audit task_flags checks.
2554 spin_lock_irqsave(&cmd->t_state_lock, flags); 2556 spin_lock_irqsave(&cmd->t_state_lock, flags);
2555 if ((cmd->transport_state & CMD_T_BUSY) && 2557 if ((cmd->transport_state & CMD_T_BUSY) &&
2556 (cmd->transport_state & CMD_T_SENT)) { 2558 (cmd->transport_state & CMD_T_SENT)) {
2557 if (!target_stop_cmd(cmd, &flags)) 2559 if (!target_stop_cmd(cmd, &flags))
2558 ret++; 2560 ret++;
2559 } 2561 }
2560 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2562 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2561 2563
2562 pr_debug("ConfigFS: cmd: %p stop tasks ret:" 2564 pr_debug("ConfigFS: cmd: %p stop tasks ret:"
2563 " %d\n", cmd, ret); 2565 " %d\n", cmd, ret);
2564 if (!ret) { 2566 if (!ret) {
2565 pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", 2567 pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n",
2566 cmd->se_tfo->get_task_tag(cmd)); 2568 cmd->se_tfo->get_task_tag(cmd));
2567 wait_for_completion(&cmd->transport_lun_stop_comp); 2569 wait_for_completion(&cmd->transport_lun_stop_comp);
2568 pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", 2570 pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n",
2569 cmd->se_tfo->get_task_tag(cmd)); 2571 cmd->se_tfo->get_task_tag(cmd));
2570 } 2572 }
2571 2573
2572 return 0; 2574 return 0;
2573 } 2575 }
2574 2576
2575 static void __transport_clear_lun_from_sessions(struct se_lun *lun) 2577 static void __transport_clear_lun_from_sessions(struct se_lun *lun)
2576 { 2578 {
2577 struct se_cmd *cmd = NULL; 2579 struct se_cmd *cmd = NULL;
2578 unsigned long lun_flags, cmd_flags; 2580 unsigned long lun_flags, cmd_flags;
2579 /* 2581 /*
2580 * Do exception processing and return CHECK_CONDITION status to the 2582 * Do exception processing and return CHECK_CONDITION status to the
2581 * Initiator Port. 2583 * Initiator Port.
2582 */ 2584 */
2583 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); 2585 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
2584 while (!list_empty(&lun->lun_cmd_list)) { 2586 while (!list_empty(&lun->lun_cmd_list)) {
2585 cmd = list_first_entry(&lun->lun_cmd_list, 2587 cmd = list_first_entry(&lun->lun_cmd_list,
2586 struct se_cmd, se_lun_node); 2588 struct se_cmd, se_lun_node);
2587 list_del_init(&cmd->se_lun_node); 2589 list_del_init(&cmd->se_lun_node);
2588 2590
2589 spin_lock(&cmd->t_state_lock); 2591 spin_lock(&cmd->t_state_lock);
2590 pr_debug("SE_LUN[%d] - Setting cmd->transport" 2592 pr_debug("SE_LUN[%d] - Setting cmd->transport"
2591 "_lun_stop for ITT: 0x%08x\n", 2593 "_lun_stop for ITT: 0x%08x\n",
2592 cmd->se_lun->unpacked_lun, 2594 cmd->se_lun->unpacked_lun,
2593 cmd->se_tfo->get_task_tag(cmd)); 2595 cmd->se_tfo->get_task_tag(cmd));
2594 cmd->transport_state |= CMD_T_LUN_STOP; 2596 cmd->transport_state |= CMD_T_LUN_STOP;
2595 spin_unlock(&cmd->t_state_lock); 2597 spin_unlock(&cmd->t_state_lock);
2596 2598
2597 spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); 2599 spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
2598 2600
2599 if (!cmd->se_lun) { 2601 if (!cmd->se_lun) {
2600 pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", 2602 pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n",
2601 cmd->se_tfo->get_task_tag(cmd), 2603 cmd->se_tfo->get_task_tag(cmd),
2602 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); 2604 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
2603 BUG(); 2605 BUG();
2604 } 2606 }
2605 /* 2607 /*
2606 * If the Storage engine still owns the iscsi_cmd_t, determine 2608 * If the Storage engine still owns the iscsi_cmd_t, determine
2607 * and/or stop its context. 2609 * and/or stop its context.
2608 */ 2610 */
2609 pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" 2611 pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport"
2610 "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, 2612 "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun,
2611 cmd->se_tfo->get_task_tag(cmd)); 2613 cmd->se_tfo->get_task_tag(cmd));
2612 2614
2613 if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { 2615 if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) {
2614 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); 2616 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
2615 continue; 2617 continue;
2616 } 2618 }
2617 2619
2618 pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" 2620 pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun"
2619 "_wait_for_tasks(): SUCCESS\n", 2621 "_wait_for_tasks(): SUCCESS\n",
2620 cmd->se_lun->unpacked_lun, 2622 cmd->se_lun->unpacked_lun,
2621 cmd->se_tfo->get_task_tag(cmd)); 2623 cmd->se_tfo->get_task_tag(cmd));
2622 2624
2623 spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); 2625 spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
2624 if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { 2626 if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) {
2625 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); 2627 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
2626 goto check_cond; 2628 goto check_cond;
2627 } 2629 }
2628 cmd->transport_state &= ~CMD_T_DEV_ACTIVE; 2630 cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
2629 target_remove_from_state_list(cmd); 2631 target_remove_from_state_list(cmd);
2630 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); 2632 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
2631 2633
2632 /* 2634 /*
2633 * The Storage engine stopped this struct se_cmd before it was 2635 * The Storage engine stopped this struct se_cmd before it was
2634 * send to the fabric frontend for delivery back to the 2636 * send to the fabric frontend for delivery back to the
2635 * Initiator Node. Return this SCSI CDB back with an 2637 * Initiator Node. Return this SCSI CDB back with an
2636 * CHECK_CONDITION status. 2638 * CHECK_CONDITION status.
2637 */ 2639 */
2638 check_cond: 2640 check_cond:
2639 transport_send_check_condition_and_sense(cmd, 2641 transport_send_check_condition_and_sense(cmd,
2640 TCM_NON_EXISTENT_LUN, 0); 2642 TCM_NON_EXISTENT_LUN, 0);
2641 /* 2643 /*
2642 * If the fabric frontend is waiting for this iscsi_cmd_t to 2644 * If the fabric frontend is waiting for this iscsi_cmd_t to
2643 * be released, notify the waiting thread now that LU has 2645 * be released, notify the waiting thread now that LU has
2644 * finished accessing it. 2646 * finished accessing it.
2645 */ 2647 */
2646 spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); 2648 spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
2647 if (cmd->transport_state & CMD_T_LUN_FE_STOP) { 2649 if (cmd->transport_state & CMD_T_LUN_FE_STOP) {
2648 pr_debug("SE_LUN[%d] - Detected FE stop for" 2650 pr_debug("SE_LUN[%d] - Detected FE stop for"
2649 " struct se_cmd: %p ITT: 0x%08x\n", 2651 " struct se_cmd: %p ITT: 0x%08x\n",
2650 lun->unpacked_lun, 2652 lun->unpacked_lun,
2651 cmd, cmd->se_tfo->get_task_tag(cmd)); 2653 cmd, cmd->se_tfo->get_task_tag(cmd));
2652 2654
2653 spin_unlock_irqrestore(&cmd->t_state_lock, 2655 spin_unlock_irqrestore(&cmd->t_state_lock,
2654 cmd_flags); 2656 cmd_flags);
2655 transport_cmd_check_stop(cmd, false); 2657 transport_cmd_check_stop(cmd, false);
2656 complete(&cmd->transport_lun_fe_stop_comp); 2658 complete(&cmd->transport_lun_fe_stop_comp);
2657 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); 2659 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
2658 continue; 2660 continue;
2659 } 2661 }
2660 pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", 2662 pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n",
2661 lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); 2663 lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd));
2662 2664
2663 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); 2665 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
2664 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); 2666 spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
2665 } 2667 }
2666 spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); 2668 spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
2667 } 2669 }
2668 2670
2669 static int transport_clear_lun_thread(void *p) 2671 static int transport_clear_lun_thread(void *p)
2670 { 2672 {
2671 struct se_lun *lun = p; 2673 struct se_lun *lun = p;
2672 2674
2673 __transport_clear_lun_from_sessions(lun); 2675 __transport_clear_lun_from_sessions(lun);
2674 complete(&lun->lun_shutdown_comp); 2676 complete(&lun->lun_shutdown_comp);
2675 2677
2676 return 0; 2678 return 0;
2677 } 2679 }
2678 2680
2679 int transport_clear_lun_from_sessions(struct se_lun *lun) 2681 int transport_clear_lun_from_sessions(struct se_lun *lun)
2680 { 2682 {
2681 struct task_struct *kt; 2683 struct task_struct *kt;
2682 2684
2683 kt = kthread_run(transport_clear_lun_thread, lun, 2685 kt = kthread_run(transport_clear_lun_thread, lun,
2684 "tcm_cl_%u", lun->unpacked_lun); 2686 "tcm_cl_%u", lun->unpacked_lun);
2685 if (IS_ERR(kt)) { 2687 if (IS_ERR(kt)) {
2686 pr_err("Unable to start clear_lun thread\n"); 2688 pr_err("Unable to start clear_lun thread\n");
2687 return PTR_ERR(kt); 2689 return PTR_ERR(kt);
2688 } 2690 }
2689 wait_for_completion(&lun->lun_shutdown_comp); 2691 wait_for_completion(&lun->lun_shutdown_comp);
2690 2692
2691 return 0; 2693 return 0;
2692 } 2694 }
2693 2695
2694 /** 2696 /**
2695 * transport_wait_for_tasks - wait for completion to occur 2697 * transport_wait_for_tasks - wait for completion to occur
2696 * @cmd: command to wait 2698 * @cmd: command to wait
2697 * 2699 *
2698 * Called from frontend fabric context to wait for storage engine 2700 * Called from frontend fabric context to wait for storage engine
2699 * to pause and/or release frontend generated struct se_cmd. 2701 * to pause and/or release frontend generated struct se_cmd.
2700 */ 2702 */
2701 bool transport_wait_for_tasks(struct se_cmd *cmd) 2703 bool transport_wait_for_tasks(struct se_cmd *cmd)
2702 { 2704 {
2703 unsigned long flags; 2705 unsigned long flags;
2704 2706
2705 spin_lock_irqsave(&cmd->t_state_lock, flags); 2707 spin_lock_irqsave(&cmd->t_state_lock, flags);
2706 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && 2708 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) &&
2707 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { 2709 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
2708 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2710 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2709 return false; 2711 return false;
2710 } 2712 }
2711 2713
2712 if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && 2714 if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) &&
2713 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { 2715 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
2714 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2716 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2715 return false; 2717 return false;
2716 } 2718 }
2717 /* 2719 /*
2718 * If we are already stopped due to an external event (ie: LUN shutdown) 2720 * If we are already stopped due to an external event (ie: LUN shutdown)
2719 * sleep until the connection can have the passed struct se_cmd back. 2721 * sleep until the connection can have the passed struct se_cmd back.
2720 * The cmd->transport_lun_stopped_sem will be upped by 2722 * The cmd->transport_lun_stopped_sem will be upped by
2721 * transport_clear_lun_from_sessions() once the ConfigFS context caller 2723 * transport_clear_lun_from_sessions() once the ConfigFS context caller
2722 * has completed its operation on the struct se_cmd. 2724 * has completed its operation on the struct se_cmd.
2723 */ 2725 */
2724 if (cmd->transport_state & CMD_T_LUN_STOP) { 2726 if (cmd->transport_state & CMD_T_LUN_STOP) {
2725 pr_debug("wait_for_tasks: Stopping" 2727 pr_debug("wait_for_tasks: Stopping"
2726 " wait_for_completion(&cmd->t_tasktransport_lun_fe" 2728 " wait_for_completion(&cmd->t_tasktransport_lun_fe"
2727 "_stop_comp); for ITT: 0x%08x\n", 2729 "_stop_comp); for ITT: 0x%08x\n",
2728 cmd->se_tfo->get_task_tag(cmd)); 2730 cmd->se_tfo->get_task_tag(cmd));
2729 /* 2731 /*
2730 * There is a special case for WRITES where a FE exception + 2732 * There is a special case for WRITES where a FE exception +
2731 * LUN shutdown means ConfigFS context is still sleeping on 2733 * LUN shutdown means ConfigFS context is still sleeping on
2732 * transport_lun_stop_comp in transport_lun_wait_for_tasks(). 2734 * transport_lun_stop_comp in transport_lun_wait_for_tasks().
2733 * We go ahead and up transport_lun_stop_comp just to be sure 2735 * We go ahead and up transport_lun_stop_comp just to be sure
2734 * here. 2736 * here.
2735 */ 2737 */
2736 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2738 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2737 complete(&cmd->transport_lun_stop_comp); 2739 complete(&cmd->transport_lun_stop_comp);
2738 wait_for_completion(&cmd->transport_lun_fe_stop_comp); 2740 wait_for_completion(&cmd->transport_lun_fe_stop_comp);
2739 spin_lock_irqsave(&cmd->t_state_lock, flags); 2741 spin_lock_irqsave(&cmd->t_state_lock, flags);
2740 2742
2741 target_remove_from_state_list(cmd); 2743 target_remove_from_state_list(cmd);
2742 /* 2744 /*
2743 * At this point, the frontend who was the originator of this 2745 * At this point, the frontend who was the originator of this
2744 * struct se_cmd, now owns the structure and can be released through 2746 * struct se_cmd, now owns the structure and can be released through
2745 * normal means below. 2747 * normal means below.
2746 */ 2748 */
2747 pr_debug("wait_for_tasks: Stopped" 2749 pr_debug("wait_for_tasks: Stopped"
2748 " wait_for_completion(&cmd->t_tasktransport_lun_fe_" 2750 " wait_for_completion(&cmd->t_tasktransport_lun_fe_"
2749 "stop_comp); for ITT: 0x%08x\n", 2751 "stop_comp); for ITT: 0x%08x\n",
2750 cmd->se_tfo->get_task_tag(cmd)); 2752 cmd->se_tfo->get_task_tag(cmd));
2751 2753
2752 cmd->transport_state &= ~CMD_T_LUN_STOP; 2754 cmd->transport_state &= ~CMD_T_LUN_STOP;
2753 } 2755 }
2754 2756
2755 if (!(cmd->transport_state & CMD_T_ACTIVE)) { 2757 if (!(cmd->transport_state & CMD_T_ACTIVE)) {
2756 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2758 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2757 return false; 2759 return false;
2758 } 2760 }
2759 2761
2760 cmd->transport_state |= CMD_T_STOP; 2762 cmd->transport_state |= CMD_T_STOP;
2761 2763
2762 pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" 2764 pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
2763 " i_state: %d, t_state: %d, CMD_T_STOP\n", 2765 " i_state: %d, t_state: %d, CMD_T_STOP\n",
2764 cmd, cmd->se_tfo->get_task_tag(cmd), 2766 cmd, cmd->se_tfo->get_task_tag(cmd),
2765 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); 2767 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
2766 2768
2767 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2769 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2768 2770
2769 wait_for_completion(&cmd->t_transport_stop_comp); 2771 wait_for_completion(&cmd->t_transport_stop_comp);
2770 2772
2771 spin_lock_irqsave(&cmd->t_state_lock, flags); 2773 spin_lock_irqsave(&cmd->t_state_lock, flags);
2772 cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); 2774 cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP);
2773 2775
2774 pr_debug("wait_for_tasks: Stopped wait_for_compltion(" 2776 pr_debug("wait_for_tasks: Stopped wait_for_compltion("
2775 "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", 2777 "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n",
2776 cmd->se_tfo->get_task_tag(cmd)); 2778 cmd->se_tfo->get_task_tag(cmd));
2777 2779
2778 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2780 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2779 2781
2780 return true; 2782 return true;
2781 } 2783 }
2782 EXPORT_SYMBOL(transport_wait_for_tasks); 2784 EXPORT_SYMBOL(transport_wait_for_tasks);
2783 2785
2784 static int transport_get_sense_codes( 2786 static int transport_get_sense_codes(
2785 struct se_cmd *cmd, 2787 struct se_cmd *cmd,
2786 u8 *asc, 2788 u8 *asc,
2787 u8 *ascq) 2789 u8 *ascq)
2788 { 2790 {
2789 *asc = cmd->scsi_asc; 2791 *asc = cmd->scsi_asc;
2790 *ascq = cmd->scsi_ascq; 2792 *ascq = cmd->scsi_ascq;
2791 2793
2792 return 0; 2794 return 0;
2793 } 2795 }
2794 2796
2795 static int transport_set_sense_codes( 2797 static int transport_set_sense_codes(
2796 struct se_cmd *cmd, 2798 struct se_cmd *cmd,
2797 u8 asc, 2799 u8 asc,
2798 u8 ascq) 2800 u8 ascq)
2799 { 2801 {
2800 cmd->scsi_asc = asc; 2802 cmd->scsi_asc = asc;
2801 cmd->scsi_ascq = ascq; 2803 cmd->scsi_ascq = ascq;
2802 2804
2803 return 0; 2805 return 0;
2804 } 2806 }
2805 2807
2806 int transport_send_check_condition_and_sense( 2808 int transport_send_check_condition_and_sense(
2807 struct se_cmd *cmd, 2809 struct se_cmd *cmd,
2808 u8 reason, 2810 u8 reason,
2809 int from_transport) 2811 int from_transport)
2810 { 2812 {
2811 unsigned char *buffer = cmd->sense_buffer; 2813 unsigned char *buffer = cmd->sense_buffer;
2812 unsigned long flags; 2814 unsigned long flags;
2813 int offset; 2815 int offset;
2814 u8 asc = 0, ascq = 0; 2816 u8 asc = 0, ascq = 0;
2815 2817
2816 spin_lock_irqsave(&cmd->t_state_lock, flags); 2818 spin_lock_irqsave(&cmd->t_state_lock, flags);
2817 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { 2819 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
2818 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2820 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2819 return 0; 2821 return 0;
2820 } 2822 }
2821 cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; 2823 cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION;
2822 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2824 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2823 2825
2824 if (!reason && from_transport) 2826 if (!reason && from_transport)
2825 goto after_reason; 2827 goto after_reason;
2826 2828
2827 if (!from_transport) 2829 if (!from_transport)
2828 cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; 2830 cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
2829 /* 2831 /*
2830 * Data Segment and SenseLength of the fabric response PDU. 2832 * Data Segment and SenseLength of the fabric response PDU.
2831 * 2833 *
2832 * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE 2834 * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE
2833 * from include/scsi/scsi_cmnd.h 2835 * from include/scsi/scsi_cmnd.h
2834 */ 2836 */
2835 offset = cmd->se_tfo->set_fabric_sense_len(cmd, 2837 offset = cmd->se_tfo->set_fabric_sense_len(cmd,
2836 TRANSPORT_SENSE_BUFFER); 2838 TRANSPORT_SENSE_BUFFER);
2837 /* 2839 /*
2838 * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses 2840 * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
2839 * SENSE KEY values from include/scsi/scsi.h 2841 * SENSE KEY values from include/scsi/scsi.h
2840 */ 2842 */
2841 switch (reason) { 2843 switch (reason) {
2842 case TCM_NON_EXISTENT_LUN: 2844 case TCM_NON_EXISTENT_LUN:
2843 /* CURRENT ERROR */ 2845 /* CURRENT ERROR */
2844 buffer[offset] = 0x70; 2846 buffer[offset] = 0x70;
2845 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2847 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2846 /* ILLEGAL REQUEST */ 2848 /* ILLEGAL REQUEST */
2847 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2849 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2848 /* LOGICAL UNIT NOT SUPPORTED */ 2850 /* LOGICAL UNIT NOT SUPPORTED */
2849 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; 2851 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25;
2850 break; 2852 break;
2851 case TCM_UNSUPPORTED_SCSI_OPCODE: 2853 case TCM_UNSUPPORTED_SCSI_OPCODE:
2852 case TCM_SECTOR_COUNT_TOO_MANY: 2854 case TCM_SECTOR_COUNT_TOO_MANY:
2853 /* CURRENT ERROR */ 2855 /* CURRENT ERROR */
2854 buffer[offset] = 0x70; 2856 buffer[offset] = 0x70;
2855 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2857 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2856 /* ILLEGAL REQUEST */ 2858 /* ILLEGAL REQUEST */
2857 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2859 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2858 /* INVALID COMMAND OPERATION CODE */ 2860 /* INVALID COMMAND OPERATION CODE */
2859 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; 2861 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20;
2860 break; 2862 break;
2861 case TCM_UNKNOWN_MODE_PAGE: 2863 case TCM_UNKNOWN_MODE_PAGE:
2862 /* CURRENT ERROR */ 2864 /* CURRENT ERROR */
2863 buffer[offset] = 0x70; 2865 buffer[offset] = 0x70;
2864 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2866 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2865 /* ILLEGAL REQUEST */ 2867 /* ILLEGAL REQUEST */
2866 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2868 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2867 /* INVALID FIELD IN CDB */ 2869 /* INVALID FIELD IN CDB */
2868 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; 2870 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
2869 break; 2871 break;
2870 case TCM_CHECK_CONDITION_ABORT_CMD: 2872 case TCM_CHECK_CONDITION_ABORT_CMD:
2871 /* CURRENT ERROR */ 2873 /* CURRENT ERROR */
2872 buffer[offset] = 0x70; 2874 buffer[offset] = 0x70;
2873 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2875 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2874 /* ABORTED COMMAND */ 2876 /* ABORTED COMMAND */
2875 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; 2877 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
2876 /* BUS DEVICE RESET FUNCTION OCCURRED */ 2878 /* BUS DEVICE RESET FUNCTION OCCURRED */
2877 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; 2879 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29;
2878 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; 2880 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03;
2879 break; 2881 break;
2880 case TCM_INCORRECT_AMOUNT_OF_DATA: 2882 case TCM_INCORRECT_AMOUNT_OF_DATA:
2881 /* CURRENT ERROR */ 2883 /* CURRENT ERROR */
2882 buffer[offset] = 0x70; 2884 buffer[offset] = 0x70;
2883 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2885 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2884 /* ABORTED COMMAND */ 2886 /* ABORTED COMMAND */
2885 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; 2887 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
2886 /* WRITE ERROR */ 2888 /* WRITE ERROR */
2887 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; 2889 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
2888 /* NOT ENOUGH UNSOLICITED DATA */ 2890 /* NOT ENOUGH UNSOLICITED DATA */
2889 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; 2891 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d;
2890 break; 2892 break;
2891 case TCM_INVALID_CDB_FIELD: 2893 case TCM_INVALID_CDB_FIELD:
2892 /* CURRENT ERROR */ 2894 /* CURRENT ERROR */
2893 buffer[offset] = 0x70; 2895 buffer[offset] = 0x70;
2894 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2896 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2895 /* ILLEGAL REQUEST */ 2897 /* ILLEGAL REQUEST */
2896 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2898 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2897 /* INVALID FIELD IN CDB */ 2899 /* INVALID FIELD IN CDB */
2898 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; 2900 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
2899 break; 2901 break;
2900 case TCM_INVALID_PARAMETER_LIST: 2902 case TCM_INVALID_PARAMETER_LIST:
2901 /* CURRENT ERROR */ 2903 /* CURRENT ERROR */
2902 buffer[offset] = 0x70; 2904 buffer[offset] = 0x70;
2903 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2905 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2904 /* ILLEGAL REQUEST */ 2906 /* ILLEGAL REQUEST */
2905 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2907 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2906 /* INVALID FIELD IN PARAMETER LIST */ 2908 /* INVALID FIELD IN PARAMETER LIST */
2907 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; 2909 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26;
2908 break; 2910 break;
2909 case TCM_UNEXPECTED_UNSOLICITED_DATA: 2911 case TCM_UNEXPECTED_UNSOLICITED_DATA:
2910 /* CURRENT ERROR */ 2912 /* CURRENT ERROR */
2911 buffer[offset] = 0x70; 2913 buffer[offset] = 0x70;
2912 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2914 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2913 /* ABORTED COMMAND */ 2915 /* ABORTED COMMAND */
2914 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; 2916 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
2915 /* WRITE ERROR */ 2917 /* WRITE ERROR */
2916 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; 2918 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
2917 /* UNEXPECTED_UNSOLICITED_DATA */ 2919 /* UNEXPECTED_UNSOLICITED_DATA */
2918 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; 2920 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c;
2919 break; 2921 break;
2920 case TCM_SERVICE_CRC_ERROR: 2922 case TCM_SERVICE_CRC_ERROR:
2921 /* CURRENT ERROR */ 2923 /* CURRENT ERROR */
2922 buffer[offset] = 0x70; 2924 buffer[offset] = 0x70;
2923 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2925 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2924 /* ABORTED COMMAND */ 2926 /* ABORTED COMMAND */
2925 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; 2927 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
2926 /* PROTOCOL SERVICE CRC ERROR */ 2928 /* PROTOCOL SERVICE CRC ERROR */
2927 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; 2929 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47;
2928 /* N/A */ 2930 /* N/A */
2929 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; 2931 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05;
2930 break; 2932 break;
2931 case TCM_SNACK_REJECTED: 2933 case TCM_SNACK_REJECTED:
2932 /* CURRENT ERROR */ 2934 /* CURRENT ERROR */
2933 buffer[offset] = 0x70; 2935 buffer[offset] = 0x70;
2934 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2936 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2935 /* ABORTED COMMAND */ 2937 /* ABORTED COMMAND */
2936 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; 2938 buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
2937 /* READ ERROR */ 2939 /* READ ERROR */
2938 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; 2940 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11;
2939 /* FAILED RETRANSMISSION REQUEST */ 2941 /* FAILED RETRANSMISSION REQUEST */
2940 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; 2942 buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13;
2941 break; 2943 break;
2942 case TCM_WRITE_PROTECTED: 2944 case TCM_WRITE_PROTECTED:
2943 /* CURRENT ERROR */ 2945 /* CURRENT ERROR */
2944 buffer[offset] = 0x70; 2946 buffer[offset] = 0x70;
2945 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2947 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2946 /* DATA PROTECT */ 2948 /* DATA PROTECT */
2947 buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; 2949 buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
2948 /* WRITE PROTECTED */ 2950 /* WRITE PROTECTED */
2949 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; 2951 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27;
2950 break; 2952 break;
2951 case TCM_ADDRESS_OUT_OF_RANGE: 2953 case TCM_ADDRESS_OUT_OF_RANGE:
2952 /* CURRENT ERROR */ 2954 /* CURRENT ERROR */
2953 buffer[offset] = 0x70; 2955 buffer[offset] = 0x70;
2954 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2956 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2955 /* ILLEGAL REQUEST */ 2957 /* ILLEGAL REQUEST */
2956 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2958 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2957 /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ 2959 /* LOGICAL BLOCK ADDRESS OUT OF RANGE */
2958 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x21; 2960 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x21;
2959 break; 2961 break;
2960 case TCM_CHECK_CONDITION_UNIT_ATTENTION: 2962 case TCM_CHECK_CONDITION_UNIT_ATTENTION:
2961 /* CURRENT ERROR */ 2963 /* CURRENT ERROR */
2962 buffer[offset] = 0x70; 2964 buffer[offset] = 0x70;
2963 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2965 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2964 /* UNIT ATTENTION */ 2966 /* UNIT ATTENTION */
2965 buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 2967 buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
2966 core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); 2968 core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
2967 buffer[offset+SPC_ASC_KEY_OFFSET] = asc; 2969 buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
2968 buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; 2970 buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
2969 break; 2971 break;
2970 case TCM_CHECK_CONDITION_NOT_READY: 2972 case TCM_CHECK_CONDITION_NOT_READY:
2971 /* CURRENT ERROR */ 2973 /* CURRENT ERROR */
2972 buffer[offset] = 0x70; 2974 buffer[offset] = 0x70;
2973 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2975 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2974 /* Not Ready */ 2976 /* Not Ready */
2975 buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; 2977 buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY;
2976 transport_get_sense_codes(cmd, &asc, &ascq); 2978 transport_get_sense_codes(cmd, &asc, &ascq);
2977 buffer[offset+SPC_ASC_KEY_OFFSET] = asc; 2979 buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
2978 buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; 2980 buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
2979 break; 2981 break;
2980 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: 2982 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
2981 default: 2983 default:
2982 /* CURRENT ERROR */ 2984 /* CURRENT ERROR */
2983 buffer[offset] = 0x70; 2985 buffer[offset] = 0x70;
2984 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; 2986 buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
2985 /* ILLEGAL REQUEST */ 2987 /* ILLEGAL REQUEST */
2986 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; 2988 buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2987 /* LOGICAL UNIT COMMUNICATION FAILURE */ 2989 /* LOGICAL UNIT COMMUNICATION FAILURE */
2988 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; 2990 buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80;
2989 break; 2991 break;
2990 } 2992 }
2991 /* 2993 /*
2992 * This code uses linux/include/scsi/scsi.h SAM status codes! 2994 * This code uses linux/include/scsi/scsi.h SAM status codes!
2993 */ 2995 */
2994 cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 2996 cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
2995 /* 2997 /*
2996 * Automatically padded, this value is encoded in the fabric's 2998 * Automatically padded, this value is encoded in the fabric's
2997 * data_length response PDU containing the SCSI defined sense data. 2999 * data_length response PDU containing the SCSI defined sense data.
2998 */ 3000 */
2999 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; 3001 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
3000 3002
3001 after_reason: 3003 after_reason:
3002 return cmd->se_tfo->queue_status(cmd); 3004 return cmd->se_tfo->queue_status(cmd);
3003 } 3005 }
3004 EXPORT_SYMBOL(transport_send_check_condition_and_sense); 3006 EXPORT_SYMBOL(transport_send_check_condition_and_sense);
3005 3007
3006 int transport_check_aborted_status(struct se_cmd *cmd, int send_status) 3008 int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
3007 { 3009 {
3008 int ret = 0; 3010 int ret = 0;
3009 3011
3010 if (cmd->transport_state & CMD_T_ABORTED) { 3012 if (cmd->transport_state & CMD_T_ABORTED) {
3011 if (!send_status || 3013 if (!send_status ||
3012 (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) 3014 (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
3013 return 1; 3015 return 1;
3014 3016
3015 pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" 3017 pr_debug("Sending delayed SAM_STAT_TASK_ABORTED"
3016 " status for CDB: 0x%02x ITT: 0x%08x\n", 3018 " status for CDB: 0x%02x ITT: 0x%08x\n",
3017 cmd->t_task_cdb[0], 3019 cmd->t_task_cdb[0],
3018 cmd->se_tfo->get_task_tag(cmd)); 3020 cmd->se_tfo->get_task_tag(cmd));
3019 3021
3020 cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; 3022 cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS;
3021 cmd->se_tfo->queue_status(cmd); 3023 cmd->se_tfo->queue_status(cmd);
3022 ret = 1; 3024 ret = 1;
3023 } 3025 }
3024 return ret; 3026 return ret;
3025 } 3027 }
3026 EXPORT_SYMBOL(transport_check_aborted_status); 3028 EXPORT_SYMBOL(transport_check_aborted_status);
3027 3029
3028 void transport_send_task_abort(struct se_cmd *cmd) 3030 void transport_send_task_abort(struct se_cmd *cmd)
3029 { 3031 {
3030 unsigned long flags; 3032 unsigned long flags;
3031 3033
3032 spin_lock_irqsave(&cmd->t_state_lock, flags); 3034 spin_lock_irqsave(&cmd->t_state_lock, flags);
3033 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { 3035 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
3034 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 3036 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
3035 return; 3037 return;
3036 } 3038 }
3037 spin_unlock_irqrestore(&cmd->t_state_lock, flags); 3039 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
3038 3040
3039 /* 3041 /*
3040 * If there are still expected incoming fabric WRITEs, we wait 3042 * If there are still expected incoming fabric WRITEs, we wait
3041 * until until they have completed before sending a TASK_ABORTED 3043 * until until they have completed before sending a TASK_ABORTED
3042 * response. This response with TASK_ABORTED status will be 3044 * response. This response with TASK_ABORTED status will be
3043 * queued back to fabric module by transport_check_aborted_status(). 3045 * queued back to fabric module by transport_check_aborted_status().
3044 */ 3046 */
3045 if (cmd->data_direction == DMA_TO_DEVICE) { 3047 if (cmd->data_direction == DMA_TO_DEVICE) {
3046 if (cmd->se_tfo->write_pending_status(cmd) != 0) { 3048 if (cmd->se_tfo->write_pending_status(cmd) != 0) {
3047 cmd->transport_state |= CMD_T_ABORTED; 3049 cmd->transport_state |= CMD_T_ABORTED;
3048 smp_mb__after_atomic_inc(); 3050 smp_mb__after_atomic_inc();
3049 } 3051 }
3050 } 3052 }
3051 cmd->scsi_status = SAM_STAT_TASK_ABORTED; 3053 cmd->scsi_status = SAM_STAT_TASK_ABORTED;
3052 3054
3053 pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," 3055 pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
3054 " ITT: 0x%08x\n", cmd->t_task_cdb[0], 3056 " ITT: 0x%08x\n", cmd->t_task_cdb[0],
3055 cmd->se_tfo->get_task_tag(cmd)); 3057 cmd->se_tfo->get_task_tag(cmd));
3056 3058
3057 cmd->se_tfo->queue_status(cmd); 3059 cmd->se_tfo->queue_status(cmd);
3058 } 3060 }
3059 3061
3060 static void target_tmr_work(struct work_struct *work) 3062 static void target_tmr_work(struct work_struct *work)
3061 { 3063 {
3062 struct se_cmd *cmd = container_of(work, struct se_cmd, work); 3064 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
3063 struct se_device *dev = cmd->se_dev; 3065 struct se_device *dev = cmd->se_dev;
3064 struct se_tmr_req *tmr = cmd->se_tmr_req; 3066 struct se_tmr_req *tmr = cmd->se_tmr_req;
3065 int ret; 3067 int ret;
3066 3068
3067 switch (tmr->function) { 3069 switch (tmr->function) {
3068 case TMR_ABORT_TASK: 3070 case TMR_ABORT_TASK:
3069 core_tmr_abort_task(dev, tmr, cmd->se_sess); 3071 core_tmr_abort_task(dev, tmr, cmd->se_sess);
3070 break; 3072 break;
3071 case TMR_ABORT_TASK_SET: 3073 case TMR_ABORT_TASK_SET:
3072 case TMR_CLEAR_ACA: 3074 case TMR_CLEAR_ACA:
3073 case TMR_CLEAR_TASK_SET: 3075 case TMR_CLEAR_TASK_SET:
3074 tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; 3076 tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
3075 break; 3077 break;
3076 case TMR_LUN_RESET: 3078 case TMR_LUN_RESET:
3077 ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); 3079 ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
3078 tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : 3080 tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
3079 TMR_FUNCTION_REJECTED; 3081 TMR_FUNCTION_REJECTED;
3080 break; 3082 break;
3081 case TMR_TARGET_WARM_RESET: 3083 case TMR_TARGET_WARM_RESET:
3082 tmr->response = TMR_FUNCTION_REJECTED; 3084 tmr->response = TMR_FUNCTION_REJECTED;
3083 break; 3085 break;
3084 case TMR_TARGET_COLD_RESET: 3086 case TMR_TARGET_COLD_RESET:
3085 tmr->response = TMR_FUNCTION_REJECTED; 3087 tmr->response = TMR_FUNCTION_REJECTED;
3086 break; 3088 break;
3087 default: 3089 default:
3088 pr_err("Uknown TMR function: 0x%02x.\n", 3090 pr_err("Uknown TMR function: 0x%02x.\n",
3089 tmr->function); 3091 tmr->function);
3090 tmr->response = TMR_FUNCTION_REJECTED; 3092 tmr->response = TMR_FUNCTION_REJECTED;
3091 break; 3093 break;
3092 } 3094 }
3093 3095
3094 cmd->t_state = TRANSPORT_ISTATE_PROCESSING; 3096 cmd->t_state = TRANSPORT_ISTATE_PROCESSING;
3095 cmd->se_tfo->queue_tm_rsp(cmd); 3097 cmd->se_tfo->queue_tm_rsp(cmd);
3096 3098
3097 transport_cmd_check_stop_to_fabric(cmd); 3099 transport_cmd_check_stop_to_fabric(cmd);
3098 } 3100 }
3099 3101
3100 int transport_generic_handle_tmr( 3102 int transport_generic_handle_tmr(
3101 struct se_cmd *cmd) 3103 struct se_cmd *cmd)
3102 { 3104 {
3103 INIT_WORK(&cmd->work, target_tmr_work); 3105 INIT_WORK(&cmd->work, target_tmr_work);
3104 queue_work(cmd->se_dev->tmr_wq, &cmd->work); 3106 queue_work(cmd->se_dev->tmr_wq, &cmd->work);
3105 return 0; 3107 return 0;
3106 } 3108 }
3107 EXPORT_SYMBOL(transport_generic_handle_tmr); 3109 EXPORT_SYMBOL(transport_generic_handle_tmr);
3108 3110