Blame view
drivers/scsi/scsi_ioctl.c
9.14 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
/* * Changes: * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 08/23/2000 * - get rid of some verify_areas and use __copy*user and __get/put_user * for the ones that remain */ #include <linux/module.h> #include <linux/blkdev.h> #include <linux/interrupt.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/string.h> #include <asm/uaccess.h> #include <scsi/scsi.h> |
beb404875 [SCSI] remove scs... |
18 |
#include <scsi/scsi_cmnd.h> |
1da177e4c Linux-2.6.12-rc2 |
19 20 21 22 |
#include <scsi/scsi_device.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_ioctl.h> |
1da177e4c Linux-2.6.12-rc2 |
23 24 25 26 27 28 29 |
#include <scsi/sg.h> #include <scsi/scsi_dbg.h> #include "scsi_logging.h" #define NORMAL_RETRIES 5 #define IOCTL_NORMAL_TIMEOUT (10 * HZ) |
1da177e4c Linux-2.6.12-rc2 |
30 31 |
#define MAX_BUF PAGE_SIZE |
32993523d [SCSI] fix SCSI_I... |
32 33 34 35 36 37 38 |
/** * ioctl_probe -- return host identification * @host: host to identify * @buffer: userspace buffer for identification * * Return an identifying string at @buffer, if @buffer is non-NULL, filling * to the length stored at * (int *) @buffer. |
1da177e4c Linux-2.6.12-rc2 |
39 |
*/ |
1da177e4c Linux-2.6.12-rc2 |
40 41 42 43 |
static int ioctl_probe(struct Scsi_Host *host, void __user *buffer) { unsigned int len, slen; const char *string; |
1da177e4c Linux-2.6.12-rc2 |
44 |
|
32993523d [SCSI] fix SCSI_I... |
45 |
if (buffer) { |
1da177e4c Linux-2.6.12-rc2 |
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 |
if (get_user(len, (unsigned int __user *) buffer)) return -EFAULT; if (host->hostt->info) string = host->hostt->info(host); else string = host->hostt->name; if (string) { slen = strlen(string); if (len > slen) len = slen + 1; if (copy_to_user(buffer, string, len)) return -EFAULT; } } |
32993523d [SCSI] fix SCSI_I... |
61 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 |
} /* * The SCSI_IOCTL_SEND_COMMAND ioctl sends a command out to the SCSI host. * The IOCTL_NORMAL_TIMEOUT and NORMAL_RETRIES variables are used. * * dev is the SCSI device struct ptr, *(int *) arg is the length of the * input data, if any, not including the command string & counts, * *((int *)arg + 1) is the output buffer size in bytes. * * *(char *) ((int *) arg)[2] the actual command byte. * * Note that if more than MAX_BUF bytes are requested to be transferred, * the ioctl will fail with error EINVAL. * * This size *does not* include the initial lengths that were passed. * * The SCSI command is read from the memory location immediately after the * length words, and the input data is right after the command. The SCSI * routines know the command size based on the opcode decode. * * The output area is then filled in starting from the command byte. */ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd, int timeout, int retries) { |
1da177e4c Linux-2.6.12-rc2 |
90 91 92 93 94 |
int result; struct scsi_sense_hdr sshdr; SCSI_LOG_IOCTL(1, printk("Trying ioctl with scsi command %d ", *cmd)); |
1cf72699c [SCSI] convert th... |
95 |
result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, |
f4f4e47e4 [SCSI] add residu... |
96 |
&sshdr, timeout, retries, NULL); |
1da177e4c Linux-2.6.12-rc2 |
97 |
|
1cf72699c [SCSI] convert th... |
98 99 |
SCSI_LOG_IOCTL(2, printk("Ioctl returned 0x%x ", result)); |
1da177e4c Linux-2.6.12-rc2 |
100 |
|
1cf72699c [SCSI] convert th... |
101 |
if ((driver_byte(result) & DRIVER_SENSE) && |
ea73a9f23 [SCSI] convert sd... |
102 |
(scsi_sense_valid(&sshdr))) { |
1da177e4c Linux-2.6.12-rc2 |
103 104 105 106 107 108 109 110 111 112 113 |
switch (sshdr.sense_key) { case ILLEGAL_REQUEST: if (cmd[0] == ALLOW_MEDIUM_REMOVAL) sdev->lockable = 0; else printk(KERN_INFO "ioctl_internal_command: " "ILLEGAL REQUEST asc=0x%x ascq=0x%x ", sshdr.asc, sshdr.ascq); break; case NOT_READY: /* This happens if there is no disc in drive */ |
a75ad3c27 [PATCH] scsi: kil... |
114 |
if (sdev->removable) |
1da177e4c Linux-2.6.12-rc2 |
115 |
break; |
1da177e4c Linux-2.6.12-rc2 |
116 117 118 |
case UNIT_ATTENTION: if (sdev->removable) { sdev->changed = 1; |
1cf72699c [SCSI] convert th... |
119 |
result = 0; /* This is no longer considered an error */ |
1da177e4c Linux-2.6.12-rc2 |
120 121 122 |
break; } default: /* Fall through for non-removable media */ |
9ccfc756a [SCSI] move the m... |
123 124 125 126 |
sdev_printk(KERN_INFO, sdev, "ioctl_internal_command return code = %x ", result); |
ea73a9f23 [SCSI] convert sd... |
127 |
scsi_print_sense_hdr(" ", &sshdr); |
1da177e4c Linux-2.6.12-rc2 |
128 129 130 |
break; } } |
1da177e4c Linux-2.6.12-rc2 |
131 132 |
SCSI_LOG_IOCTL(2, printk("IOCTL Releasing command ")); |
1da177e4c Linux-2.6.12-rc2 |
133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 |
return result; } int scsi_set_medium_removal(struct scsi_device *sdev, char state) { char scsi_cmd[MAX_COMMAND_SIZE]; int ret; if (!sdev->removable || !sdev->lockable) return 0; scsi_cmd[0] = ALLOW_MEDIUM_REMOVAL; scsi_cmd[1] = 0; scsi_cmd[2] = 0; scsi_cmd[3] = 0; scsi_cmd[4] = state; scsi_cmd[5] = 0; ret = ioctl_internal_command(sdev, scsi_cmd, IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES); if (ret == 0) sdev->locked = (state == SCSI_REMOVAL_PREVENT); return ret; } EXPORT_SYMBOL(scsi_set_medium_removal); /* |
1da177e4c Linux-2.6.12-rc2 |
160 161 162 163 164 165 166 167 168 169 170 171 |
* The scsi_ioctl_get_pci() function places into arg the value * pci_dev::slot_name (8 characters) for the PCI device (if any). * Returns: 0 on success * -ENXIO if there isn't a PCI device pointer * (could be because the SCSI driver hasn't been * updated yet, or because it isn't a SCSI * device) * any copy_to_user() error on failure there */ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg) { struct device *dev = scsi_get_device(sdev->host); |
71610f55f [SCSI] struct dev... |
172 |
const char *name; |
1da177e4c Linux-2.6.12-rc2 |
173 174 175 |
if (!dev) return -ENXIO; |
71610f55f [SCSI] struct dev... |
176 177 178 179 180 181 182 |
name = dev_name(dev); /* compatibility with old ioctl which only returned * 20 characters */ return copy_to_user(arg, name, min(strlen(name), (size_t)20)) ? -EFAULT: 0; |
1da177e4c Linux-2.6.12-rc2 |
183 |
} |
eb44820c2 [SCSI] Add Docume... |
184 185 186 187 188 189 190 191 192 |
/** * scsi_ioctl - Dispatch ioctl to scsi device * @sdev: scsi device receiving ioctl * @cmd: which ioctl is it * @arg: data associated with ioctl * * Description: The scsi_ioctl() function differs from most ioctls in that it * does not take a major/minor number as the dev field. Rather, it takes * a pointer to a &struct scsi_device. |
1da177e4c Linux-2.6.12-rc2 |
193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 |
*/ int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) { char scsi_cmd[MAX_COMMAND_SIZE]; /* No idea how this happens.... */ if (!sdev) return -ENXIO; /* * If we are in the middle of error recovery, don't let anyone * else try and use this device. Also, if error recovery fails, it * may try and take the device offline, in which case all further * access to the device is prohibited. */ if (!scsi_block_when_processing_errors(sdev)) return -ENODEV; /* Check for deprecated ioctls ... all the ioctls which don't * follow the new unique numbering scheme are deprecated */ switch (cmd) { case SCSI_IOCTL_SEND_COMMAND: case SCSI_IOCTL_TEST_UNIT_READY: case SCSI_IOCTL_BENCHMARK_COMMAND: case SCSI_IOCTL_SYNC: case SCSI_IOCTL_START_UNIT: case SCSI_IOCTL_STOP_UNIT: printk(KERN_WARNING "program %s is using a deprecated SCSI " "ioctl, please convert it to SG_IO ", current->comm); break; default: break; } switch (cmd) { case SCSI_IOCTL_GET_IDLUN: if (!access_ok(VERIFY_WRITE, arg, sizeof(struct scsi_idlun))) return -EFAULT; __put_user((sdev->id & 0xff) + ((sdev->lun & 0xff) << 8) + ((sdev->channel & 0xff) << 16) + ((sdev->host->host_no & 0xff) << 24), &((struct scsi_idlun __user *)arg)->dev_id); __put_user(sdev->host->unique_id, &((struct scsi_idlun __user *)arg)->host_unique_id); return 0; case SCSI_IOCTL_GET_BUS_NUMBER: return put_user(sdev->host->host_no, (int __user *)arg); case SCSI_IOCTL_PROBE_HOST: return ioctl_probe(sdev->host, arg); case SCSI_IOCTL_SEND_COMMAND: if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; |
e915e872e [PATCH] switch sg... |
248 |
return sg_scsi_ioctl(sdev->request_queue, NULL, 0, arg); |
1da177e4c Linux-2.6.12-rc2 |
249 250 251 252 253 254 |
case SCSI_IOCTL_DOORLOCK: return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); case SCSI_IOCTL_DOORUNLOCK: return scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); case SCSI_IOCTL_TEST_UNIT_READY: return scsi_test_unit_ready(sdev, IOCTL_NORMAL_TIMEOUT, |
001aac257 [SCSI] sd,sr: add... |
255 |
NORMAL_RETRIES, NULL); |
1da177e4c Linux-2.6.12-rc2 |
256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 |
case SCSI_IOCTL_START_UNIT: scsi_cmd[0] = START_STOP; scsi_cmd[1] = 0; scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0; scsi_cmd[4] = 1; return ioctl_internal_command(sdev, scsi_cmd, START_STOP_TIMEOUT, NORMAL_RETRIES); case SCSI_IOCTL_STOP_UNIT: scsi_cmd[0] = START_STOP; scsi_cmd[1] = 0; scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0; scsi_cmd[4] = 0; return ioctl_internal_command(sdev, scsi_cmd, START_STOP_TIMEOUT, NORMAL_RETRIES); case SCSI_IOCTL_GET_PCI: return scsi_ioctl_get_pci(sdev, arg); default: if (sdev->host->hostt->ioctl) return sdev->host->hostt->ioctl(sdev, cmd, arg); } return -EINVAL; } EXPORT_SYMBOL(scsi_ioctl); |
eb44820c2 [SCSI] Add Docume... |
279 |
/** |
decf67e31 [SCSI] scsi ioctl... |
280 |
* scsi_nonblockable_ioctl() - Handle SG_SCSI_RESET |
eb44820c2 [SCSI] Add Docume... |
281 282 283 |
* @sdev: scsi device receiving ioctl * @cmd: Must be SC_SCSI_RESET * @arg: pointer to int containing SG_SCSI_RESET_{DEVICE,BUS,HOST} |
decf67e31 [SCSI] scsi ioctl... |
284 |
* @ndelay: file mode O_NDELAY flag |
1da177e4c Linux-2.6.12-rc2 |
285 286 |
*/ int scsi_nonblockable_ioctl(struct scsi_device *sdev, int cmd, |
83ff6fe85 [PATCH] don't mes... |
287 |
void __user *arg, int ndelay) |
1da177e4c Linux-2.6.12-rc2 |
288 289 290 291 292 293 |
{ int val, result; /* The first set of iocts may be executed even if we're doing * error processing, as long as the device was opened * non-blocking */ |
83ff6fe85 [PATCH] don't mes... |
294 |
if (ndelay) { |
939647ee3 [SCSI] fix oops o... |
295 |
if (scsi_host_in_recovery(sdev->host)) |
1da177e4c Linux-2.6.12-rc2 |
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 |
return -ENODEV; } else if (!scsi_block_when_processing_errors(sdev)) return -ENODEV; switch (cmd) { case SG_SCSI_RESET: result = get_user(val, (int __user *)arg); if (result) return result; if (val == SG_SCSI_RESET_NOTHING) return 0; switch (val) { case SG_SCSI_RESET_DEVICE: val = SCSI_TRY_RESET_DEVICE; break; |
3f9daedfc [SCSI] add scsi t... |
311 312 313 |
case SG_SCSI_RESET_TARGET: val = SCSI_TRY_RESET_TARGET; break; |
1da177e4c Linux-2.6.12-rc2 |
314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 |
case SG_SCSI_RESET_BUS: val = SCSI_TRY_RESET_BUS; break; case SG_SCSI_RESET_HOST: val = SCSI_TRY_RESET_HOST; break; default: return -EINVAL; } if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; return (scsi_reset_provider(sdev, val) == SUCCESS) ? 0 : -EIO; } return -ENODEV; } EXPORT_SYMBOL(scsi_nonblockable_ioctl); |