Blame view
fs/nfs/callback_xdr.c
25.7 KB
1da177e4c
|
1 2 3 4 5 6 7 |
/* * linux/fs/nfs/callback_xdr.c * * Copyright (C) 2004 Trond Myklebust * * NFSv4 callback encode/decode procedures */ |
1da177e4c
|
8 9 10 11 |
#include <linux/kernel.h> #include <linux/sunrpc/svc.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> |
9a3ba4323
|
12 13 |
#include <linux/ratelimit.h> #include <linux/printk.h> |
5a0e3ad6a
|
14 |
#include <linux/slab.h> |
c36fca52f
|
15 |
#include <linux/sunrpc/bc_xprt.h> |
4ce79717c
|
16 |
#include "nfs4_fs.h" |
1da177e4c
|
17 |
#include "callback.h" |
c36fca52f
|
18 |
#include "internal.h" |
76e697ba7
|
19 |
#include "nfs4session.h" |
1da177e4c
|
20 21 22 23 24 25 26 27 |
#define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) #define CB_OP_GETATTR_BITMAP_MAXSZ (4) #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ CB_OP_GETATTR_BITMAP_MAXSZ + \ 2 + 2 + 3 + 3) #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a19
|
28 |
#if defined(CONFIG_NFS_V4_1) |
f2a625616
|
29 |
#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
1be5683b0
|
30 |
#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a19
|
31 32 |
#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 4 + 1 + 3) |
31f096077
|
33 |
#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
b9efa1b27
|
34 |
#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a19
|
35 |
#endif /* CONFIG_NFS_V4_1 */ |
1da177e4c
|
36 |
#define NFSDBG_FACILITY NFSDBG_CALLBACK |
31d2b4356
|
37 38 |
/* Internal error code */ #define NFS4ERR_RESOURCE_HDR 11050 |
c36fca52f
|
39 40 |
typedef __be32 (*callback_process_op_t)(void *, void *, struct cb_process_state *); |
e6f684f64
|
41 42 |
typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); |
1da177e4c
|
43 44 45 46 47 48 49 50 51 52 |
struct callback_op { callback_process_op_t process_op; callback_decode_arg_t decode_args; callback_encode_res_t encode_res; long res_maxsize; }; static struct callback_op callback_ops[]; |
7111c66e4
|
53 |
static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4c
|
54 55 56 |
{ return htonl(NFS4_OK); } |
5704fdeb4
|
57 |
static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4c
|
58 59 60 |
{ return xdr_argsize_check(rqstp, p); } |
5704fdeb4
|
61 |
static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4c
|
62 63 64 |
{ return xdr_ressize_check(rqstp, p); } |
5704fdeb4
|
65 |
static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) |
1da177e4c
|
66 |
{ |
5704fdeb4
|
67 |
__be32 *p; |
1da177e4c
|
68 69 70 |
p = xdr_inline_decode(xdr, nbytes); if (unlikely(p == NULL)) |
a030889a0
|
71 72 |
printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed! "); |
1da177e4c
|
73 74 |
return p; } |
e6f684f64
|
75 |
static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) |
1da177e4c
|
76 |
{ |
5704fdeb4
|
77 |
__be32 *p; |
1da177e4c
|
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 |
p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *len = ntohl(*p); if (*len != 0) { p = read_buf(xdr, *len); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *str = (const char *)p; } else *str = NULL; return 0; } |
e6f684f64
|
94 |
static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4c
|
95 |
{ |
5704fdeb4
|
96 |
__be32 *p; |
1da177e4c
|
97 98 99 100 101 102 103 104 105 106 107 108 109 110 |
p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); fh->size = ntohl(*p); if (fh->size > NFS4_FHSIZE) return htonl(NFS4ERR_BADHANDLE); p = read_buf(xdr, fh->size); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); memcpy(&fh->data[0], p, fh->size); memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); return 0; } |
e6f684f64
|
111 |
static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4c
|
112 |
{ |
5704fdeb4
|
113 |
__be32 *p; |
1da177e4c
|
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 |
unsigned int attrlen; p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); attrlen = ntohl(*p); p = read_buf(xdr, attrlen << 2); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); if (likely(attrlen > 0)) bitmap[0] = ntohl(*p++); if (attrlen > 1) bitmap[1] = ntohl(*p); return 0; } |
e6f684f64
|
129 |
static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4c
|
130 |
{ |
5704fdeb4
|
131 |
__be32 *p; |
1da177e4c
|
132 |
|
2d2f24add
|
133 |
p = read_buf(xdr, NFS4_STATEID_SIZE); |
1da177e4c
|
134 135 |
if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); |
2d2f24add
|
136 |
memcpy(stateid, p, NFS4_STATEID_SIZE); |
1da177e4c
|
137 138 |
return 0; } |
e6f684f64
|
139 |
static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4c
|
140 |
{ |
5704fdeb4
|
141 |
__be32 *p; |
e6f684f64
|
142 |
__be32 status; |
1da177e4c
|
143 144 145 146 147 |
status = decode_string(xdr, &hdr->taglen, &hdr->tag); if (unlikely(status != 0)) return status; /* We do not like overly long tags! */ |
5cce428d9
|
148 |
if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { |
a030889a0
|
149 150 |
printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u ", |
3110ff804
|
151 |
__func__, hdr->taglen); |
1da177e4c
|
152 153 154 155 156 |
return htonl(NFS4ERR_RESOURCE); } p = read_buf(xdr, 12); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); |
b8f2ef84b
|
157 |
hdr->minorversion = ntohl(*p++); |
459de2edb
|
158 159 |
/* Check for minor version support */ if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { |
42c2c4249
|
160 |
hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
48a9e2d22
|
161 |
} else { |
9a3ba4323
|
162 |
pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
b8f2ef84b
|
163 164 165 |
"illegal minor version %u! ", __func__, hdr->minorversion); |
1da177e4c
|
166 167 |
return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } |
1da177e4c
|
168 |
hdr->nops = ntohl(*p); |
b8f2ef84b
|
169 170 171 |
dprintk("%s: minorversion %d nops %d ", __func__, hdr->minorversion, hdr->nops); |
1da177e4c
|
172 173 |
return 0; } |
e6f684f64
|
174 |
static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4c
|
175 |
{ |
5704fdeb4
|
176 |
__be32 *p; |
1da177e4c
|
177 178 |
p = read_buf(xdr, 4); if (unlikely(p == NULL)) |
31d2b4356
|
179 |
return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4c
|
180 181 182 |
*op = ntohl(*p); return 0; } |
e6f684f64
|
183 |
static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) |
1da177e4c
|
184 |
{ |
e6f684f64
|
185 |
__be32 status; |
1da177e4c
|
186 187 188 189 |
status = decode_fh(xdr, &args->fh); if (unlikely(status != 0)) goto out; |
671beed7e
|
190 |
args->addr = svc_addr(rqstp); |
1da177e4c
|
191 192 |
status = decode_bitmap(xdr, args->bitmap); out: |
3110ff804
|
193 194 |
dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
1da177e4c
|
195 196 |
return status; } |
e6f684f64
|
197 |
static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) |
1da177e4c
|
198 |
{ |
5704fdeb4
|
199 |
__be32 *p; |
e6f684f64
|
200 |
__be32 status; |
1da177e4c
|
201 |
|
c1d358665
|
202 |
args->addr = svc_addr(rqstp); |
1da177e4c
|
203 204 205 206 207 208 209 210 211 212 213 |
status = decode_stateid(xdr, &args->stateid); if (unlikely(status != 0)) goto out; p = read_buf(xdr, 4); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_RESOURCE); goto out; } args->truncate = ntohl(*p); status = decode_fh(xdr, &args->fh); out: |
3110ff804
|
214 215 |
dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
3873bc50e
|
216 |
return status; |
1da177e4c
|
217 |
} |
4aece6a19
|
218 |
#if defined(CONFIG_NFS_V4_1) |
f2a625616
|
219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 |
static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_layoutrecallargs *args) { __be32 *p; __be32 status = 0; uint32_t iomode; args->cbl_addr = svc_addr(rqstp); p = read_buf(xdr, 4 * sizeof(uint32_t)); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto out; } args->cbl_layout_type = ntohl(*p++); /* Depite the spec's xdr, iomode really belongs in the FILE switch, |
25985edce
|
236 |
* as it is unusable and ignored with the other types. |
f2a625616
|
237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 |
*/ iomode = ntohl(*p++); args->cbl_layoutchanged = ntohl(*p++); args->cbl_recall_type = ntohl(*p++); if (args->cbl_recall_type == RETURN_FILE) { args->cbl_range.iomode = iomode; status = decode_fh(xdr, &args->cbl_fh); if (unlikely(status != 0)) goto out; p = read_buf(xdr, 2 * sizeof(uint64_t)); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto out; } p = xdr_decode_hyper(p, &args->cbl_range.offset); p = xdr_decode_hyper(p, &args->cbl_range.length); status = decode_stateid(xdr, &args->cbl_stateid); if (unlikely(status != 0)) goto out; } else if (args->cbl_recall_type == RETURN_FSID) { p = read_buf(xdr, 2 * sizeof(uint64_t)); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto out; } p = xdr_decode_hyper(p, &args->cbl_fsid.major); p = xdr_decode_hyper(p, &args->cbl_fsid.minor); } else if (args->cbl_recall_type != RETURN_ALL) { status = htonl(NFS4ERR_BADXDR); goto out; } dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d ", __func__, args->cbl_layout_type, iomode, args->cbl_layoutchanged, args->cbl_recall_type); out: dprintk("%s: exit with status = %d ", __func__, ntohl(status)); return status; } |
1be5683b0
|
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 |
static __be32 decode_devicenotify_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_devicenotifyargs *args) { __be32 *p; __be32 status = 0; u32 tmp; int n, i; args->ndevs = 0; /* Num of device notifications */ p = read_buf(xdr, sizeof(uint32_t)); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto out; } n = ntohl(*p++); if (n <= 0) goto out; |
363e0df05
|
300 301 302 303 |
if (n > ULONG_MAX / sizeof(*args->devs)) { status = htonl(NFS4ERR_BADXDR); goto out; } |
1be5683b0
|
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 |
args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL); if (!args->devs) { status = htonl(NFS4ERR_DELAY); goto out; } /* Decode each dev notification */ for (i = 0; i < n; i++) { struct cb_devicenotifyitem *dev = &args->devs[i]; p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto err; } tmp = ntohl(*p++); /* bitmap size */ if (tmp != 1) { status = htonl(NFS4ERR_INVAL); goto err; } dev->cbd_notify_type = ntohl(*p++); if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { status = htonl(NFS4ERR_INVAL); goto err; } tmp = ntohl(*p++); /* opaque size */ if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && (tmp != NFS4_DEVICEID4_SIZE + 8)) || ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && (tmp != NFS4_DEVICEID4_SIZE + 4))) { status = htonl(NFS4ERR_INVAL); goto err; } dev->cbd_layout_type = ntohl(*p++); memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { p = read_buf(xdr, sizeof(uint32_t)); if (unlikely(p == NULL)) { status = htonl(NFS4ERR_BADXDR); goto err; } dev->cbd_immediate = ntohl(*p++); } else { dev->cbd_immediate = 0; } args->ndevs++; dprintk("%s: type %d layout 0x%x immediate %d ", __func__, dev->cbd_notify_type, dev->cbd_layout_type, dev->cbd_immediate); } out: dprintk("%s: status %d ndevs %d ", __func__, ntohl(status), args->ndevs); return status; err: kfree(args->devs); goto out; } |
9733f0d92
|
372 |
static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a19
|
373 374 |
struct nfs4_sessionid *sid) { |
9733f0d92
|
375 |
__be32 *p; |
4aece6a19
|
376 377 378 379 |
int len = NFS4_MAX_SESSIONID_LEN; p = read_buf(xdr, len); if (unlikely(p == NULL)) |
a419aef8b
|
380 |
return htonl(NFS4ERR_RESOURCE); |
4aece6a19
|
381 382 383 384 |
memcpy(sid->data, p, len); return 0; } |
9733f0d92
|
385 |
static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a19
|
386 387 |
struct referring_call_list *rc_list) { |
9733f0d92
|
388 |
__be32 *p; |
4aece6a19
|
389 |
int i; |
9733f0d92
|
390 |
__be32 status; |
4aece6a19
|
391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 |
status = decode_sessionid(xdr, &rc_list->rcl_sessionid); if (status) goto out; status = htonl(NFS4ERR_RESOURCE); p = read_buf(xdr, sizeof(uint32_t)); if (unlikely(p == NULL)) goto out; rc_list->rcl_nrefcalls = ntohl(*p++); if (rc_list->rcl_nrefcalls) { p = read_buf(xdr, rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); if (unlikely(p == NULL)) goto out; rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls * sizeof(*rc_list->rcl_refcalls), GFP_KERNEL); if (unlikely(rc_list->rcl_refcalls == NULL)) goto out; for (i = 0; i < rc_list->rcl_nrefcalls; i++) { rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); } } status = 0; out: return status; } |
9733f0d92
|
422 |
static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a19
|
423 424 425 |
struct xdr_stream *xdr, struct cb_sequenceargs *args) { |
9733f0d92
|
426 |
__be32 *p; |
4aece6a19
|
427 |
int i; |
9733f0d92
|
428 |
__be32 status; |
4aece6a19
|
429 430 431 432 433 434 435 436 437 |
status = decode_sessionid(xdr, &args->csa_sessionid); if (status) goto out; status = htonl(NFS4ERR_RESOURCE); p = read_buf(xdr, 5 * sizeof(uint32_t)); if (unlikely(p == NULL)) goto out; |
65fc64e54
|
438 |
args->csa_addr = svc_addr(rqstp); |
4aece6a19
|
439 440 441 442 443 444 445 |
args->csa_sequenceid = ntohl(*p++); args->csa_slotid = ntohl(*p++); args->csa_highestslotid = ntohl(*p++); args->csa_cachethis = ntohl(*p++); args->csa_nrclists = ntohl(*p++); args->csa_rclists = NULL; if (args->csa_nrclists) { |
0439f31c3
|
446 447 448 |
args->csa_rclists = kmalloc_array(args->csa_nrclists, sizeof(*args->csa_rclists), GFP_KERNEL); |
4aece6a19
|
449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 |
if (unlikely(args->csa_rclists == NULL)) goto out; for (i = 0; i < args->csa_nrclists; i++) { status = decode_rc_list(xdr, &args->csa_rclists[i]); if (status) goto out_free; } } status = 0; dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " "highestslotid %u cachethis %d nrclists %u ", __func__, ((u32 *)&args->csa_sessionid)[0], ((u32 *)&args->csa_sessionid)[1], ((u32 *)&args->csa_sessionid)[2], ((u32 *)&args->csa_sessionid)[3], args->csa_sequenceid, args->csa_slotid, args->csa_highestslotid, args->csa_cachethis, args->csa_nrclists); out: dprintk("%s: exit with status = %d ", __func__, ntohl(status)); return status; out_free: for (i = 0; i < args->csa_nrclists; i++) kfree(args->csa_rclists[i].rcl_refcalls); kfree(args->csa_rclists); goto out; } |
9733f0d92
|
482 |
static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f096077
|
483 484 485 |
struct xdr_stream *xdr, struct cb_recallanyargs *args) { |
d743c3c9c
|
486 487 |
uint32_t bitmap[2]; __be32 *p, status; |
31f096077
|
488 489 490 491 492 493 |
args->craa_addr = svc_addr(rqstp); p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_BADXDR); args->craa_objs_to_keep = ntohl(*p++); |
d743c3c9c
|
494 495 496 497 |
status = decode_bitmap(xdr, bitmap); if (unlikely(status)) return status; args->craa_type_mask = bitmap[0]; |
31f096077
|
498 499 500 |
return 0; } |
9733f0d92
|
501 |
static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b27
|
502 503 504 505 506 507 508 509 510 |
struct xdr_stream *xdr, struct cb_recallslotargs *args) { __be32 *p; args->crsa_addr = svc_addr(rqstp); p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_BADXDR); |
d5fb4ce33
|
511 |
args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b27
|
512 513 |
return 0; } |
4aece6a19
|
514 |
#endif /* CONFIG_NFS_V4_1 */ |
e6f684f64
|
515 |
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4c
|
516 |
{ |
5704fdeb4
|
517 |
__be32 *p; |
1da177e4c
|
518 519 520 521 522 523 524 525 526 527 |
p = xdr_reserve_space(xdr, 4 + len); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); xdr_encode_opaque(p, str, len); return 0; } #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) |
5704fdeb4
|
528 |
static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
1da177e4c
|
529 |
{ |
5704fdeb4
|
530 531 |
__be32 bm[2]; __be32 *p; |
1da177e4c
|
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 |
bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); if (bm[1] != 0) { p = xdr_reserve_space(xdr, 16); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *p++ = htonl(2); *p++ = bm[0]; *p++ = bm[1]; } else if (bm[0] != 0) { p = xdr_reserve_space(xdr, 12); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *p++ = htonl(1); *p++ = bm[0]; } else { p = xdr_reserve_space(xdr, 8); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *p++ = htonl(0); } *savep = p; return 0; } |
e6f684f64
|
557 |
static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4c
|
558 |
{ |
5704fdeb4
|
559 |
__be32 *p; |
1da177e4c
|
560 561 562 563 |
if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) return 0; p = xdr_reserve_space(xdr, 8); |
90dc7d279
|
564 |
if (unlikely(!p)) |
1da177e4c
|
565 566 567 568 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, change); return 0; } |
e6f684f64
|
569 |
static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4c
|
570 |
{ |
5704fdeb4
|
571 |
__be32 *p; |
1da177e4c
|
572 573 574 575 |
if (!(bitmap[0] & FATTR4_WORD0_SIZE)) return 0; p = xdr_reserve_space(xdr, 8); |
90dc7d279
|
576 |
if (unlikely(!p)) |
1da177e4c
|
577 578 579 580 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, size); return 0; } |
e6f684f64
|
581 |
static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4c
|
582 |
{ |
5704fdeb4
|
583 |
__be32 *p; |
1da177e4c
|
584 585 |
p = xdr_reserve_space(xdr, 12); |
90dc7d279
|
586 |
if (unlikely(!p)) |
1da177e4c
|
587 588 589 590 591 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, time->tv_sec); *p = htonl(time->tv_nsec); return 0; } |
e6f684f64
|
592 |
static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4c
|
593 594 595 596 597 |
{ if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) return 0; return encode_attr_time(xdr,time); } |
e6f684f64
|
598 |
static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4c
|
599 600 601 602 603 |
{ if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) return 0; return encode_attr_time(xdr,time); } |
e6f684f64
|
604 |
static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4c
|
605 |
{ |
e6f684f64
|
606 |
__be32 status; |
1da177e4c
|
607 608 609 610 611 612 613 614 615 616 617 618 |
hdr->status = xdr_reserve_space(xdr, 4); if (unlikely(hdr->status == NULL)) return htonl(NFS4ERR_RESOURCE); status = encode_string(xdr, hdr->taglen, hdr->tag); if (unlikely(status != 0)) return status; hdr->nops = xdr_reserve_space(xdr, 4); if (unlikely(hdr->nops == NULL)) return htonl(NFS4ERR_RESOURCE); return 0; } |
e6f684f64
|
619 |
static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4c
|
620 |
{ |
5704fdeb4
|
621 |
__be32 *p; |
1da177e4c
|
622 623 624 |
p = xdr_reserve_space(xdr, 8); if (unlikely(p == NULL)) |
31d2b4356
|
625 |
return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4c
|
626 627 628 629 |
*p++ = htonl(op); *p = res; return 0; } |
e6f684f64
|
630 |
static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) |
1da177e4c
|
631 |
{ |
5704fdeb4
|
632 |
__be32 *savep = NULL; |
e6f684f64
|
633 |
__be32 status = res->status; |
1da177e4c
|
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
if (unlikely(status != 0)) goto out; status = encode_attr_bitmap(xdr, res->bitmap, &savep); if (unlikely(status != 0)) goto out; status = encode_attr_change(xdr, res->bitmap, res->change_attr); if (unlikely(status != 0)) goto out; status = encode_attr_size(xdr, res->bitmap, res->size); if (unlikely(status != 0)) goto out; status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); if (unlikely(status != 0)) goto out; status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); out: |
3110ff804
|
652 653 |
dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
1da177e4c
|
654 655 |
return status; } |
34bc47c94
|
656 |
#if defined(CONFIG_NFS_V4_1) |
9733f0d92
|
657 |
static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a19
|
658 659 |
const struct nfs4_sessionid *sid) { |
9733f0d92
|
660 |
__be32 *p; |
4aece6a19
|
661 662 663 664 665 666 667 668 669 |
int len = NFS4_MAX_SESSIONID_LEN; p = xdr_reserve_space(xdr, len); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); memcpy(p, sid, len); return 0; } |
9733f0d92
|
670 |
static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a19
|
671 672 673 |
struct xdr_stream *xdr, const struct cb_sequenceres *res) { |
9733f0d92
|
674 |
__be32 *p; |
e216c8c77
|
675 |
__be32 status = res->csr_status; |
4aece6a19
|
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 |
if (unlikely(status != 0)) goto out; encode_sessionid(xdr, &res->csr_sessionid); p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); *p++ = htonl(res->csr_sequenceid); *p++ = htonl(res->csr_slotid); *p++ = htonl(res->csr_highestslotid); *p++ = htonl(res->csr_target_highestslotid); out: dprintk("%s: exit with status = %d ", __func__, ntohl(status)); return status; } |
34bc47c94
|
695 696 697 |
static __be32 preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) { |
281fe15dc
|
698 699 700 701 702 703 704 |
if (op_nr == OP_CB_SEQUENCE) { if (nop != 0) return htonl(NFS4ERR_SEQUENCE_POS); } else { if (nop == 0) return htonl(NFS4ERR_OP_NOT_IN_SESSION); } |
34bc47c94
|
705 706 707 |
switch (op_nr) { case OP_CB_GETATTR: case OP_CB_RECALL: |
4aece6a19
|
708 |
case OP_CB_SEQUENCE: |
31f096077
|
709 |
case OP_CB_RECALL_ANY: |
b9efa1b27
|
710 |
case OP_CB_RECALL_SLOT: |
f2a625616
|
711 |
case OP_CB_LAYOUTRECALL: |
1be5683b0
|
712 |
case OP_CB_NOTIFY_DEVICEID: |
34bc47c94
|
713 714 |
*op = &callback_ops[op_nr]; break; |
34bc47c94
|
715 716 |
case OP_CB_NOTIFY: case OP_CB_PUSH_DELEG: |
34bc47c94
|
717 |
case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c94
|
718 719 720 721 722 723 724 725 726 727 |
case OP_CB_WANTS_CANCELLED: case OP_CB_NOTIFY_LOCK: return htonl(NFS4ERR_NOTSUPP); default: return htonl(NFS4ERR_OP_ILLEGAL); } return htonl(NFS_OK); } |
42acd0218
|
728 729 730 731 732 733 734 735 736 |
static void nfs4_callback_free_slot(struct nfs4_session *session) { struct nfs4_slot_table *tbl = &session->bc_slot_table; spin_lock(&tbl->slot_tbl_lock); /* * Let the state manager know callback processing done. * A single slot, so highest used slotid is either 0 or -1 */ |
45d43c291
|
737 |
tbl->highest_used_slotid = NFS4_NO_SLOT; |
774d5f14e
|
738 |
nfs4_slot_tbl_drain_complete(tbl); |
42acd0218
|
739 740 |
spin_unlock(&tbl->slot_tbl_lock); } |
55a673990
|
741 |
static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd0218
|
742 |
{ |
45d43c291
|
743 |
if (cps->slotid != NFS4_NO_SLOT) |
55a673990
|
744 |
nfs4_callback_free_slot(cps->clp->cl_session); |
42acd0218
|
745 |
} |
34bc47c94
|
746 747 748 749 750 751 752 |
#else /* CONFIG_NFS_V4_1 */ static __be32 preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) { return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } |
55a673990
|
753 |
static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd0218
|
754 755 |
{ } |
34bc47c94
|
756 |
#endif /* CONFIG_NFS_V4_1 */ |
6b140b85d
|
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 |
#ifdef CONFIG_NFS_V4_2 static __be32 preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) { __be32 status = preprocess_nfs41_op(nop, op_nr, op); if (status != htonl(NFS4ERR_OP_ILLEGAL)) return status; if (op_nr == OP_CB_OFFLOAD) return htonl(NFS4ERR_NOTSUPP); return htonl(NFS4ERR_OP_ILLEGAL); } #else /* CONFIG_NFS_V4_2 */ static __be32 preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) { return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } #endif /* CONFIG_NFS_V4_2 */ |
34bc47c94
|
776 777 778 779 780 781 782 783 784 785 786 787 788 789 |
static __be32 preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) { switch (op_nr) { case OP_CB_GETATTR: case OP_CB_RECALL: *op = &callback_ops[op_nr]; break; default: return htonl(NFS4ERR_OP_ILLEGAL); } return htonl(NFS_OK); } |
459de2edb
|
790 |
static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4c
|
791 |
struct xdr_stream *xdr_in, void *argp, |
c36fca52f
|
792 793 |
struct xdr_stream *xdr_out, void *resp, struct cb_process_state *cps) |
1da177e4c
|
794 |
{ |
a162a6b80
|
795 |
struct callback_op *op = &callback_ops[0]; |
31d2b4356
|
796 |
unsigned int op_nr; |
34bc47c94
|
797 |
__be32 status; |
1da177e4c
|
798 |
long maxlen; |
e6f684f64
|
799 |
__be32 res; |
1da177e4c
|
800 |
|
3110ff804
|
801 802 |
dprintk("%s: start ", __func__); |
1da177e4c
|
803 |
status = decode_op_hdr(xdr_in, &op_nr); |
31d2b4356
|
804 805 |
if (unlikely(status)) return status; |
1da177e4c
|
806 |
|
34bc47c94
|
807 808 |
dprintk("%s: minorversion=%d nop=%d op_nr=%u ", |
459de2edb
|
809 |
__func__, cps->minorversion, nop, op_nr); |
34bc47c94
|
810 |
|
6b140b85d
|
811 812 813 814 815 816 817 818 819 820 821 822 823 |
switch (cps->minorversion) { case 0: status = preprocess_nfs4_op(op_nr, &op); break; case 1: status = preprocess_nfs41_op(nop, op_nr, &op); break; case 2: status = preprocess_nfs42_op(nop, op_nr, &op); break; default: status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); } |
34bc47c94
|
824 |
|
34bc47c94
|
825 826 |
if (status == htonl(NFS4ERR_OP_ILLEGAL)) op_nr = OP_CB_ILLEGAL; |
b92b30190
|
827 828 |
if (status) goto encode_hdr; |
31d2b4356
|
829 |
|
c36fca52f
|
830 831 |
if (cps->drc_status) { status = cps->drc_status; |
4911096f1
|
832 833 |
goto encode_hdr; } |
1da177e4c
|
834 835 |
maxlen = xdr_out->end - xdr_out->p; if (maxlen > 0 && maxlen < PAGE_SIZE) { |
e95e60dae
|
836 837 |
status = op->decode_args(rqstp, xdr_in, argp); if (likely(status == 0)) |
c36fca52f
|
838 |
status = op->process_op(argp, resp, cps); |
1da177e4c
|
839 840 |
} else status = htonl(NFS4ERR_RESOURCE); |
b92b30190
|
841 |
encode_hdr: |
1da177e4c
|
842 |
res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b4356
|
843 844 |
if (unlikely(res)) return res; |
1da177e4c
|
845 846 |
if (op->encode_res != NULL && status == 0) status = op->encode_res(rqstp, xdr_out, resp); |
3110ff804
|
847 848 |
dprintk("%s: done, status = %d ", __func__, ntohl(status)); |
1da177e4c
|
849 850 851 852 853 854 |
return status; } /* * Decode, process and encode a COMPOUND */ |
7111c66e4
|
855 |
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4c
|
856 |
{ |
3a6258e1f
|
857 858 |
struct cb_compound_hdr_arg hdr_arg = { 0 }; struct cb_compound_hdr_res hdr_res = { NULL }; |
1da177e4c
|
859 |
struct xdr_stream xdr_in, xdr_out; |
c36fca52f
|
860 861 862 863 |
__be32 *p, status; struct cb_process_state cps = { .drc_status = 0, .clp = NULL, |
45d43c291
|
864 |
.slotid = NFS4_NO_SLOT, |
9695c7057
|
865 |
.net = SVC_NET(rqstp), |
c36fca52f
|
866 |
}; |
3a6258e1f
|
867 |
unsigned int nops = 0; |
1da177e4c
|
868 |
|
3110ff804
|
869 870 |
dprintk("%s: start ", __func__); |
1da177e4c
|
871 872 |
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
5704fdeb4
|
873 |
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4c
|
874 |
xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
3a6258e1f
|
875 876 877 |
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); if (status == __constant_htonl(NFS4ERR_RESOURCE)) return rpc_garbage_args; |
c36fca52f
|
878 |
if (hdr_arg.minorversion == 0) { |
9695c7057
|
879 |
cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
778be232a
|
880 |
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) |
c36fca52f
|
881 |
return rpc_drop_reply; |
778be232a
|
882 |
} |
c36fca52f
|
883 |
|
459de2edb
|
884 |
cps.minorversion = hdr_arg.minorversion; |
1da177e4c
|
885 886 |
hdr_res.taglen = hdr_arg.taglen; hdr_res.tag = hdr_arg.tag; |
3a6258e1f
|
887 888 |
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) return rpc_system_err; |
1da177e4c
|
889 |
|
3a6258e1f
|
890 |
while (status == 0 && nops != hdr_arg.nops) { |
459de2edb
|
891 892 |
status = process_op(nops, rqstp, &xdr_in, argp, &xdr_out, resp, &cps); |
1da177e4c
|
893 894 |
nops++; } |
3a6258e1f
|
895 |
|
31d2b4356
|
896 897 898 899 900 901 |
/* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return * resource error in cb_compound status without returning op */ if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { status = htonl(NFS4ERR_RESOURCE); nops--; } |
1da177e4c
|
902 903 |
*hdr_res.status = status; *hdr_res.nops = htonl(nops); |
55a673990
|
904 |
nfs4_cb_free_slot(&cps); |
c36fca52f
|
905 |
nfs_put_client(cps.clp); |
3110ff804
|
906 907 |
dprintk("%s: done, status = %u ", __func__, ntohl(status)); |
1da177e4c
|
908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
return rpc_success; } /* * Define NFS4 callback COMPOUND ops. */ static struct callback_op callback_ops[] = { [0] = { .res_maxsize = CB_OP_HDR_RES_MAXSZ, }, [OP_CB_GETATTR] = { .process_op = (callback_process_op_t)nfs4_callback_getattr, .decode_args = (callback_decode_arg_t)decode_getattr_args, .encode_res = (callback_encode_res_t)encode_getattr_res, .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, }, [OP_CB_RECALL] = { .process_op = (callback_process_op_t)nfs4_callback_recall, .decode_args = (callback_decode_arg_t)decode_recall_args, .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
4aece6a19
|
928 929 |
}, #if defined(CONFIG_NFS_V4_1) |
f2a625616
|
930 931 932 933 934 935 |
[OP_CB_LAYOUTRECALL] = { .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, .decode_args = (callback_decode_arg_t)decode_layoutrecall_args, .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, }, |
1be5683b0
|
936 937 938 939 940 941 |
[OP_CB_NOTIFY_DEVICEID] = { .process_op = (callback_process_op_t)nfs4_callback_devicenotify, .decode_args = (callback_decode_arg_t)decode_devicenotify_args, .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, }, |
4aece6a19
|
942 943 944 945 946 947 |
[OP_CB_SEQUENCE] = { .process_op = (callback_process_op_t)nfs4_callback_sequence, .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, .encode_res = (callback_encode_res_t)encode_cb_sequence_res, .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, }, |
31f096077
|
948 949 950 951 952 |
[OP_CB_RECALL_ANY] = { .process_op = (callback_process_op_t)nfs4_callback_recallany, .decode_args = (callback_decode_arg_t)decode_recallany_args, .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, }, |
b9efa1b27
|
953 954 955 956 957 |
[OP_CB_RECALL_SLOT] = { .process_op = (callback_process_op_t)nfs4_callback_recallslot, .decode_args = (callback_decode_arg_t)decode_recallslot_args, .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, }, |
4aece6a19
|
958 |
#endif /* CONFIG_NFS_V4_1 */ |
1da177e4c
|
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 |
}; /* * Define NFS4 callback procedures */ static struct svc_procedure nfs4_callback_procedures1[] = { [CB_NULL] = { .pc_func = nfs4_callback_null, .pc_decode = (kxdrproc_t)nfs4_decode_void, .pc_encode = (kxdrproc_t)nfs4_encode_void, .pc_xdrressize = 1, }, [CB_COMPOUND] = { .pc_func = nfs4_callback_compound, .pc_encode = (kxdrproc_t)nfs4_encode_void, .pc_argsize = 256, .pc_ressize = 256, .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, } }; struct svc_version nfs4_callback_version1 = { .vs_vers = 1, .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), .vs_proc = nfs4_callback_procedures1, .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, .vs_dispatch = NULL, |
49697ee79
|
986 |
.vs_hidden = 1, |
1da177e4c
|
987 |
}; |
07bccc2dd
|
988 989 990 991 992 993 |
struct svc_version nfs4_callback_version4 = { .vs_vers = 4, .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), .vs_proc = nfs4_callback_procedures1, .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, .vs_dispatch = NULL, |
6070295ef
|
994 |
.vs_hidden = 1, |
07bccc2dd
|
995 |
}; |