Blame view
fs/lockd/clnt4xdr.c
12.9 KB
b24413180 License cleanup: ... |
1 |
// SPDX-License-Identifier: GPL-2.0 |
3460f29a2 lockd: Introduce ... |
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
/* * linux/fs/lockd/clnt4xdr.c * * XDR functions to encode/decode NLM version 4 RPC arguments and results. * * NLM client-side only. * * Copyright (C) 2010, Oracle. All rights reserved. */ #include <linux/types.h> #include <linux/sunrpc/xdr.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/stats.h> #include <linux/lockd/lockd.h> |
9c69de4c9 nfsd: remove <lin... |
17 |
#include <uapi/linux/nfs3.h> |
3460f29a2 lockd: Introduce ... |
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 |
#define NLMDBG_FACILITY NLMDBG_XDR #if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) # error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" #endif #if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN) # error "NLM host name cannot be larger than NLM's maximum string length!" #endif /* * Declare the space requirements for NLM arguments and replies as * number of 32bit-words */ #define NLM4_void_sz (0) #define NLM4_cookie_sz (1+(NLM_MAXCOOKIELEN>>2)) #define NLM4_caller_sz (1+(NLMCLNT_OHSIZE>>2)) #define NLM4_owner_sz (1+(NLMCLNT_OHSIZE>>2)) #define NLM4_fhandle_sz (1+(NFS3_FHSIZE>>2)) #define NLM4_lock_sz (5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz) #define NLM4_holder_sz (6+NLM4_owner_sz) #define NLM4_testargs_sz (NLM4_cookie_sz+1+NLM4_lock_sz) #define NLM4_lockargs_sz (NLM4_cookie_sz+4+NLM4_lock_sz) #define NLM4_cancargs_sz (NLM4_cookie_sz+2+NLM4_lock_sz) #define NLM4_unlockargs_sz (NLM4_cookie_sz+NLM4_lock_sz) #define NLM4_testres_sz (NLM4_cookie_sz+1+NLM4_holder_sz) #define NLM4_res_sz (NLM4_cookie_sz+1) #define NLM4_norep_sz (0) static s64 loff_t_to_s64(loff_t offset) { s64 res; if (offset >= NLM4_OFFSET_MAX) res = NLM4_OFFSET_MAX; else if (offset <= -NLM4_OFFSET_MAX) res = -NLM4_OFFSET_MAX; else res = offset; return res; } static void nlm4_compute_offsets(const struct nlm_lock *lock, u64 *l_offset, u64 *l_len) { const struct file_lock *fl = &lock->fl; |
3460f29a2 lockd: Introduce ... |
67 68 69 70 71 72 73 74 |
*l_offset = loff_t_to_s64(fl->fl_start); if (fl->fl_end == OFFSET_MAX) *l_len = 0; else *l_len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); } /* |
3460f29a2 lockd: Introduce ... |
75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 |
* Encode/decode NLMv4 basic data types * * Basic NLMv4 data types are defined in Appendix II, section 6.1.4 * of RFC 1813: "NFS Version 3 Protocol Specification" and in Chapter * 10 of X/Open's "Protocols for Interworking: XNFS, Version 3W". * * Not all basic data types have their own encoding and decoding * functions. For run-time efficiency, some data types are encoded * or decoded inline. */ static void encode_bool(struct xdr_stream *xdr, const int value) { __be32 *p; p = xdr_reserve_space(xdr, 4); *p = value ? xdr_one : xdr_zero; } static void encode_int32(struct xdr_stream *xdr, const s32 value) { __be32 *p; p = xdr_reserve_space(xdr, 4); *p = cpu_to_be32(value); } /* * typedef opaque netobj<MAXNETOBJ_SZ> */ static void encode_netobj(struct xdr_stream *xdr, const u8 *data, const unsigned int length) { __be32 *p; |
3460f29a2 lockd: Introduce ... |
109 110 111 112 113 114 115 |
p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, data, length); } static int decode_netobj(struct xdr_stream *xdr, struct xdr_netobj *obj) { |
b8db15923 lockd: fix decodi... |
116 |
ssize_t ret; |
3460f29a2 lockd: Introduce ... |
117 |
|
b8db15923 lockd: fix decodi... |
118 119 120 121 122 |
ret = xdr_stream_decode_opaque_inline(xdr, (void *)&obj->data, XDR_MAX_NETOBJ); if (unlikely(ret < 0)) return -EIO; obj->len = ret; |
3460f29a2 lockd: Introduce ... |
123 |
return 0; |
3460f29a2 lockd: Introduce ... |
124 125 126 127 128 129 130 131 |
} /* * netobj cookie; */ static void encode_cookie(struct xdr_stream *xdr, const struct nlm_cookie *cookie) { |
3460f29a2 lockd: Introduce ... |
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 |
encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); } static int decode_cookie(struct xdr_stream *xdr, struct nlm_cookie *cookie) { u32 length; __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; length = be32_to_cpup(p++); /* apparently HPUX can return empty cookies */ if (length == 0) goto out_hpux; if (length > NLM_MAXCOOKIELEN) goto out_size; p = xdr_inline_decode(xdr, length); if (unlikely(p == NULL)) goto out_overflow; cookie->len = length; memcpy(cookie->data, p, length); return 0; out_hpux: cookie->len = 4; memset(cookie->data, 0, 4); return 0; out_size: dprintk("NFS: returned cookie was too long: %u ", length); return -EIO; out_overflow: |
3460f29a2 lockd: Introduce ... |
165 166 167 168 169 170 171 172 |
return -EIO; } /* * netobj fh; */ static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) { |
3460f29a2 lockd: Introduce ... |
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 |
encode_netobj(xdr, (u8 *)&fh->data, fh->size); } /* * enum nlm4_stats { * NLM4_GRANTED = 0, * NLM4_DENIED = 1, * NLM4_DENIED_NOLOCKS = 2, * NLM4_BLOCKED = 3, * NLM4_DENIED_GRACE_PERIOD = 4, * NLM4_DEADLCK = 5, * NLM4_ROFS = 6, * NLM4_STALE_FH = 7, * NLM4_FBIG = 8, * NLM4_FAILED = 9 * }; * * struct nlm4_stat { * nlm4_stats stat; * }; * * NB: we don't swap bytes for the NLM status values. The upper * layers deal directly with the status value in network byte * order. */ static void encode_nlm4_stat(struct xdr_stream *xdr, const __be32 stat) { __be32 *p; BUG_ON(be32_to_cpu(stat) > NLM_FAILED); p = xdr_reserve_space(xdr, 4); *p = stat; } static int decode_nlm4_stat(struct xdr_stream *xdr, __be32 *stat) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) goto out_overflow; |
e847469bf lockd: fix the en... |
215 |
if (unlikely(ntohl(*p) > ntohl(nlm4_failed))) |
3460f29a2 lockd: Introduce ... |
216 217 218 219 220 221 222 223 224 |
goto out_bad_xdr; *stat = *p; return 0; out_bad_xdr: dprintk("%s: server returned invalid nlm4_stats value: %u ", __func__, be32_to_cpup(p)); return -EIO; out_overflow: |
3460f29a2 lockd: Introduce ... |
225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 |
return -EIO; } /* * struct nlm4_holder { * bool exclusive; * int32 svid; * netobj oh; * uint64 l_offset; * uint64 l_len; * }; */ static void encode_nlm4_holder(struct xdr_stream *xdr, const struct nlm_res *result) { const struct nlm_lock *lock = &result->lock; u64 l_offset, l_len; __be32 *p; encode_bool(xdr, lock->fl.fl_type == F_RDLCK); encode_int32(xdr, lock->svid); encode_netobj(xdr, lock->oh.data, lock->oh.len); p = xdr_reserve_space(xdr, 4 + 4); nlm4_compute_offsets(lock, &l_offset, &l_len); p = xdr_encode_hyper(p, l_offset); xdr_encode_hyper(p, l_len); } static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result) { struct nlm_lock *lock = &result->lock; struct file_lock *fl = &lock->fl; u64 l_offset, l_len; u32 exclusive; int error; __be32 *p; s32 end; memset(lock, 0, sizeof(*lock)); locks_init_lock(fl); p = xdr_inline_decode(xdr, 4 + 4); if (unlikely(p == NULL)) goto out_overflow; exclusive = be32_to_cpup(p++); lock->svid = be32_to_cpup(p); fl->fl_pid = (pid_t)lock->svid; error = decode_netobj(xdr, &lock->oh); if (unlikely(error)) goto out; p = xdr_inline_decode(xdr, 8 + 8); if (unlikely(p == NULL)) goto out_overflow; fl->fl_flags = FL_POSIX; fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK; p = xdr_decode_hyper(p, &l_offset); xdr_decode_hyper(p, &l_len); end = l_offset + l_len - 1; fl->fl_start = (loff_t)l_offset; if (l_len == 0 || end < 0) fl->fl_end = OFFSET_MAX; else fl->fl_end = (loff_t)end; error = 0; out: return error; out_overflow: |
3460f29a2 lockd: Introduce ... |
297 298 299 300 301 302 303 304 305 306 307 |
return -EIO; } /* * string caller_name<LM_MAXSTRLEN>; */ static void encode_caller_name(struct xdr_stream *xdr, const char *name) { /* NB: client-side does not set lock->len */ u32 length = strlen(name); __be32 *p; |
3460f29a2 lockd: Introduce ... |
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 |
p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } /* * struct nlm4_lock { * string caller_name<LM_MAXSTRLEN>; * netobj fh; * netobj oh; * int32 svid; * uint64 l_offset; * uint64 l_len; * }; */ static void encode_nlm4_lock(struct xdr_stream *xdr, const struct nlm_lock *lock) { u64 l_offset, l_len; __be32 *p; encode_caller_name(xdr, lock->caller); encode_fh(xdr, &lock->fh); encode_netobj(xdr, lock->oh.data, lock->oh.len); p = xdr_reserve_space(xdr, 4 + 8 + 8); *p++ = cpu_to_be32(lock->svid); nlm4_compute_offsets(lock, &l_offset, &l_len); p = xdr_encode_hyper(p, l_offset); xdr_encode_hyper(p, l_len); } /* * NLMv4 XDR encode functions * * NLMv4 argument types are defined in Appendix II of RFC 1813: * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's * "Protocols for Interworking: XNFS, Version 3W". */ /* * struct nlm4_testargs { * netobj cookie; * bool exclusive; * struct nlm4_lock alock; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
356 357 |
static void nlm4_xdr_enc_testargs(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
358 |
const void *data) |
3460f29a2 lockd: Introduce ... |
359 |
{ |
bf96391e7 lockd: fix encode... |
360 |
const struct nlm_args *args = data; |
3460f29a2 lockd: Introduce ... |
361 |
const struct nlm_lock *lock = &args->lock; |
3460f29a2 lockd: Introduce ... |
362 |
|
9f06c719f SUNRPC: New xdr_s... |
363 364 365 |
encode_cookie(xdr, &args->cookie); encode_bool(xdr, lock->fl.fl_type == F_WRLCK); encode_nlm4_lock(xdr, lock); |
3460f29a2 lockd: Introduce ... |
366 367 368 369 370 371 372 373 374 375 376 377 |
} /* * struct nlm4_lockargs { * netobj cookie; * bool block; * bool exclusive; * struct nlm4_lock alock; * bool reclaim; * int state; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
378 379 |
static void nlm4_xdr_enc_lockargs(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
380 |
const void *data) |
3460f29a2 lockd: Introduce ... |
381 |
{ |
bf96391e7 lockd: fix encode... |
382 |
const struct nlm_args *args = data; |
3460f29a2 lockd: Introduce ... |
383 |
const struct nlm_lock *lock = &args->lock; |
3460f29a2 lockd: Introduce ... |
384 |
|
9f06c719f SUNRPC: New xdr_s... |
385 386 387 388 389 390 |
encode_cookie(xdr, &args->cookie); encode_bool(xdr, args->block); encode_bool(xdr, lock->fl.fl_type == F_WRLCK); encode_nlm4_lock(xdr, lock); encode_bool(xdr, args->reclaim); encode_int32(xdr, args->state); |
3460f29a2 lockd: Introduce ... |
391 392 393 394 395 396 397 398 399 400 |
} /* * struct nlm4_cancargs { * netobj cookie; * bool block; * bool exclusive; * struct nlm4_lock alock; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
401 402 |
static void nlm4_xdr_enc_cancargs(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
403 |
const void *data) |
3460f29a2 lockd: Introduce ... |
404 |
{ |
bf96391e7 lockd: fix encode... |
405 |
const struct nlm_args *args = data; |
3460f29a2 lockd: Introduce ... |
406 |
const struct nlm_lock *lock = &args->lock; |
3460f29a2 lockd: Introduce ... |
407 |
|
9f06c719f SUNRPC: New xdr_s... |
408 409 410 411 |
encode_cookie(xdr, &args->cookie); encode_bool(xdr, args->block); encode_bool(xdr, lock->fl.fl_type == F_WRLCK); encode_nlm4_lock(xdr, lock); |
3460f29a2 lockd: Introduce ... |
412 413 414 415 416 417 418 419 |
} /* * struct nlm4_unlockargs { * netobj cookie; * struct nlm4_lock alock; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
420 421 |
static void nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
422 |
const void *data) |
3460f29a2 lockd: Introduce ... |
423 |
{ |
bf96391e7 lockd: fix encode... |
424 |
const struct nlm_args *args = data; |
3460f29a2 lockd: Introduce ... |
425 |
const struct nlm_lock *lock = &args->lock; |
3460f29a2 lockd: Introduce ... |
426 |
|
9f06c719f SUNRPC: New xdr_s... |
427 428 |
encode_cookie(xdr, &args->cookie); encode_nlm4_lock(xdr, lock); |
3460f29a2 lockd: Introduce ... |
429 430 431 432 433 434 435 436 |
} /* * struct nlm4_res { * netobj cookie; * nlm4_stat stat; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
437 438 |
static void nlm4_xdr_enc_res(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
439 |
const void *data) |
3460f29a2 lockd: Introduce ... |
440 |
{ |
bf96391e7 lockd: fix encode... |
441 |
const struct nlm_res *result = data; |
9f06c719f SUNRPC: New xdr_s... |
442 443 |
encode_cookie(xdr, &result->cookie); encode_nlm4_stat(xdr, result->status); |
3460f29a2 lockd: Introduce ... |
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 |
} /* * union nlm4_testrply switch (nlm4_stats stat) { * case NLM4_DENIED: * struct nlm4_holder holder; * default: * void; * }; * * struct nlm4_testres { * netobj cookie; * nlm4_testrply test_stat; * }; */ |
9f06c719f SUNRPC: New xdr_s... |
459 460 |
static void nlm4_xdr_enc_testres(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e7 lockd: fix encode... |
461 |
const void *data) |
3460f29a2 lockd: Introduce ... |
462 |
{ |
bf96391e7 lockd: fix encode... |
463 |
const struct nlm_res *result = data; |
9f06c719f SUNRPC: New xdr_s... |
464 465 |
encode_cookie(xdr, &result->cookie); encode_nlm4_stat(xdr, result->status); |
3460f29a2 lockd: Introduce ... |
466 |
if (result->status == nlm_lck_denied) |
9f06c719f SUNRPC: New xdr_s... |
467 |
encode_nlm4_holder(xdr, result); |
3460f29a2 lockd: Introduce ... |
468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 |
} /* * NLMv4 XDR decode functions * * NLMv4 argument types are defined in Appendix II of RFC 1813: * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's * "Protocols for Interworking: XNFS, Version 3W". */ /* * union nlm4_testrply switch (nlm4_stats stat) { * case NLM4_DENIED: * struct nlm4_holder holder; * default: * void; * }; * * struct nlm4_testres { * netobj cookie; * nlm4_testrply test_stat; * }; */ static int decode_nlm4_testrply(struct xdr_stream *xdr, struct nlm_res *result) { int error; error = decode_nlm4_stat(xdr, &result->status); if (unlikely(error)) goto out; if (result->status == nlm_lck_denied) error = decode_nlm4_holder(xdr, result); out: return error; } |
bf2695516 SUNRPC: New xdr_s... |
505 506 |
static int nlm4_xdr_dec_testres(struct rpc_rqst *req, struct xdr_stream *xdr, |
1fa233912 lockd: fix decode... |
507 |
void *data) |
3460f29a2 lockd: Introduce ... |
508 |
{ |
1fa233912 lockd: fix decode... |
509 |
struct nlm_res *result = data; |
3460f29a2 lockd: Introduce ... |
510 |
int error; |
bf2695516 SUNRPC: New xdr_s... |
511 |
error = decode_cookie(xdr, &result->cookie); |
3460f29a2 lockd: Introduce ... |
512 513 |
if (unlikely(error)) goto out; |
bf2695516 SUNRPC: New xdr_s... |
514 |
error = decode_nlm4_testrply(xdr, result); |
3460f29a2 lockd: Introduce ... |
515 516 517 518 519 520 521 522 523 524 |
out: return error; } /* * struct nlm4_res { * netobj cookie; * nlm4_stat stat; * }; */ |
bf2695516 SUNRPC: New xdr_s... |
525 526 |
static int nlm4_xdr_dec_res(struct rpc_rqst *req, struct xdr_stream *xdr, |
1fa233912 lockd: fix decode... |
527 |
void *data) |
3460f29a2 lockd: Introduce ... |
528 |
{ |
1fa233912 lockd: fix decode... |
529 |
struct nlm_res *result = data; |
3460f29a2 lockd: Introduce ... |
530 |
int error; |
bf2695516 SUNRPC: New xdr_s... |
531 |
error = decode_cookie(xdr, &result->cookie); |
3460f29a2 lockd: Introduce ... |
532 533 |
if (unlikely(error)) goto out; |
bf2695516 SUNRPC: New xdr_s... |
534 |
error = decode_nlm4_stat(xdr, &result->status); |
3460f29a2 lockd: Introduce ... |
535 536 537 538 539 540 541 542 543 544 545 546 547 |
out: return error; } /* * For NLM, a void procedure really returns nothing */ #define nlm4_xdr_dec_norep NULL #define PROC(proc, argtype, restype) \ [NLMPROC_##proc] = { \ .p_proc = NLMPROC_##proc, \ |
bf96391e7 lockd: fix encode... |
548 |
.p_encode = nlm4_xdr_enc_##argtype, \ |
1fa233912 lockd: fix decode... |
549 |
.p_decode = nlm4_xdr_dec_##restype, \ |
3460f29a2 lockd: Introduce ... |
550 551 552 553 554 |
.p_arglen = NLM4_##argtype##_sz, \ .p_replen = NLM4_##restype##_sz, \ .p_statidx = NLMPROC_##proc, \ .p_name = #proc, \ } |
499b49881 sunrpc: mark all ... |
555 |
static const struct rpc_procinfo nlm4_procedures[] = { |
3460f29a2 lockd: Introduce ... |
556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 |
PROC(TEST, testargs, testres), PROC(LOCK, lockargs, res), PROC(CANCEL, cancargs, res), PROC(UNLOCK, unlockargs, res), PROC(GRANTED, testargs, res), PROC(TEST_MSG, testargs, norep), PROC(LOCK_MSG, lockargs, norep), PROC(CANCEL_MSG, cancargs, norep), PROC(UNLOCK_MSG, unlockargs, norep), PROC(GRANTED_MSG, testargs, norep), PROC(TEST_RES, testres, norep), PROC(LOCK_RES, res, norep), PROC(CANCEL_RES, res, norep), PROC(UNLOCK_RES, res, norep), PROC(GRANTED_RES, res, norep), }; |
1c5876ddb sunrpc: move p_co... |
572 |
static unsigned int nlm_version4_counts[ARRAY_SIZE(nlm4_procedures)]; |
a613fa168 SUNRPC: constify ... |
573 |
const struct rpc_version nlm_version4 = { |
3460f29a2 lockd: Introduce ... |
574 575 576 |
.number = 4, .nrprocs = ARRAY_SIZE(nlm4_procedures), .procs = nlm4_procedures, |
1c5876ddb sunrpc: move p_co... |
577 |
.counts = nlm_version4_counts, |
3460f29a2 lockd: Introduce ... |
578 |
}; |