1 /* 2 * fs/nfsd/nfs4proc.c 3 * 4 * Server-side procedures for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Note: some routines in this file are just trivial wrappers 38 * (e.g. nfsd4_lookup()) defined solely for the sake of consistent 39 * naming. Since all such routines have been declared "inline", 40 * there shouldn't be any associated overhead. At some point in 41 * the future, I might inline these "by hand" to clean up a 42 * little. 43 */ 44 45 #include <linux/param.h> 46 #include <linux/major.h> 47 #include <linux/slab.h> 48 #include <linux/file.h> 49 50 #include <linux/sunrpc/svc.h> 51 #include <linux/nfsd/nfsd.h> 52 #include <linux/nfsd/cache.h> 53 #include <linux/nfs4.h> 54 #include <linux/nfsd/state.h> 55 #include <linux/nfsd/xdr4.h> 56 #include <linux/nfs4_acl.h> 57 58 #define NFSDDBG_FACILITY NFSDDBG_PROC 59 60 static inline void 61 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 62 { 63 fh_put(dst); 64 dget(src->fh_dentry); 65 if (src->fh_export) 66 cache_get(&src->fh_export->h); 67 *dst = *src; 68 } 69 70 static int 71 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 72 { 73 int accmode, status; 74 75 if (open->op_truncate && 76 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 77 return nfserr_inval; 78 79 accmode = MAY_NOP; 80 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 81 accmode = MAY_READ; 82 if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE) 83 accmode |= (MAY_WRITE | MAY_TRUNC); 84 accmode |= MAY_OWNER_OVERRIDE; 85 86 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 87 88 return status; 89 } 90 91 static int 92 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 93 { 94 struct svc_fh resfh; 95 int status; 96 97 fh_init(&resfh, NFS4_FHSIZE); 98 open->op_truncate = 0; 99 100 if (open->op_create) { 101 /* 102 * Note: create modes (UNCHECKED,GUARDED...) are the same 103 * in NFSv4 as in v3. 104 */ 105 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, 106 open->op_fname.len, &open->op_iattr, 107 &resfh, open->op_createmode, 108 (u32 *)open->op_verf.data, &open->op_truncate); 109 } 110 else { 111 status = nfsd_lookup(rqstp, current_fh, 112 open->op_fname.data, open->op_fname.len, &resfh); 113 fh_unlock(current_fh); 114 } 115 116 if (!status) { 117 set_change_info(&open->op_cinfo, current_fh); 118 119 /* set reply cache */ 120 fh_dup2(current_fh, &resfh); 121 open->op_stateowner->so_replay.rp_openfh_len = 122 resfh.fh_handle.fh_size; 123 memcpy(open->op_stateowner->so_replay.rp_openfh, 124 &resfh.fh_handle.fh_base, 125 resfh.fh_handle.fh_size); 126 127 status = do_open_permission(rqstp, current_fh, open); 128 } 129 130 fh_put(&resfh); 131 return status; 132 } 133 134 static int 135 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 136 { 137 int status; 138 139 /* Only reclaims from previously confirmed clients are valid */ 140 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 141 return status; 142 143 /* We don't know the target directory, and therefore can not 144 * set the change info 145 */ 146 147 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 148 149 /* set replay cache */ 150 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size; 151 memcpy(open->op_stateowner->so_replay.rp_openfh, 152 ¤t_fh->fh_handle.fh_base, 153 current_fh->fh_handle.fh_size); 154 155 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 156 (open->op_iattr.ia_size == 0); 157 158 status = do_open_permission(rqstp, current_fh, open); 159 160 return status; 161 } 162 163 164 static inline int 165 nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, struct nfs4_stateowner **replay_owner) 166 { 167 int status; 168 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", 169 (int)open->op_fname.len, open->op_fname.data, 170 open->op_stateowner); 171 172 /* This check required by spec. */ 173 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 174 return nfserr_inval; 175 176 nfs4_lock_state(); 177 178 /* check seqid for replay. set nfs4_owner */ 179 status = nfsd4_process_open1(open); 180 if (status == NFSERR_REPLAY_ME) { 181 struct nfs4_replay *rp = &open->op_stateowner->so_replay; 182 fh_put(current_fh); 183 current_fh->fh_handle.fh_size = rp->rp_openfh_len; 184 memcpy(¤t_fh->fh_handle.fh_base, rp->rp_openfh, 185 rp->rp_openfh_len); 186 status = fh_verify(rqstp, current_fh, 0, MAY_NOP); 187 if (status) 188 dprintk("nfsd4_open: replay failed" 189 " restoring previous filehandle\n"); 190 else 191 status = NFSERR_REPLAY_ME; 192 } 193 if (status) 194 goto out; 195 196 /* Openowner is now set, so sequence id will get bumped. Now we need 197 * these checks before we do any creates: */ 198 status = nfserr_grace; 199 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 200 goto out; 201 status = nfserr_no_grace; 202 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 203 goto out; 204 205 switch (open->op_claim_type) { 206 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 207 status = nfserr_inval; 208 if (open->op_create) 209 goto out; 210 /* fall through */ 211 case NFS4_OPEN_CLAIM_NULL: 212 /* 213 * (1) set CURRENT_FH to the file being opened, 214 * creating it if necessary, (2) set open->op_cinfo, 215 * (3) set open->op_truncate if the file is to be 216 * truncated after opening, (4) do permission checking. 217 */ 218 status = do_open_lookup(rqstp, current_fh, open); 219 if (status) 220 goto out; 221 break; 222 case NFS4_OPEN_CLAIM_PREVIOUS: 223 open->op_stateowner->so_confirmed = 1; 224 /* 225 * The CURRENT_FH is already set to the file being 226 * opened. (1) set open->op_cinfo, (2) set 227 * open->op_truncate if the file is to be truncated 228 * after opening, (3) do permission checking. 229 */ 230 status = do_open_fhandle(rqstp, current_fh, open); 231 if (status) 232 goto out; 233 break; 234 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 235 open->op_stateowner->so_confirmed = 1; 236 printk("NFSD: unsupported OPEN claim type %d\n", 237 open->op_claim_type); 238 status = nfserr_notsupp; 239 goto out; 240 default: 241 printk("NFSD: Invalid OPEN claim type %d\n", 242 open->op_claim_type); 243 status = nfserr_inval; 244 goto out; 245 } 246 /* 247 * nfsd4_process_open2() does the actual opening of the file. If 248 * successful, it (1) truncates the file if open->op_truncate was 249 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 250 */ 251 status = nfsd4_process_open2(rqstp, current_fh, open); 252 out: 253 if (open->op_stateowner) { 254 nfs4_get_stateowner(open->op_stateowner); 255 *replay_owner = open->op_stateowner; 256 } 257 nfs4_unlock_state(); 258 return status; 259 } 260 261 /* 262 * filehandle-manipulating ops. 263 */ 264 static inline int 265 nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh) 266 { 267 if (!current_fh->fh_dentry) 268 return nfserr_nofilehandle; 269 270 *getfh = current_fh; 271 return nfs_ok; 272 } 273 274 static inline int 275 nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh) 276 { 277 fh_put(current_fh); 278 current_fh->fh_handle.fh_size = putfh->pf_fhlen; 279 memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen); 280 return fh_verify(rqstp, current_fh, 0, MAY_NOP); 281 } 282 283 static inline int 284 nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh) 285 { 286 int status; 287 288 fh_put(current_fh); 289 status = exp_pseudoroot(rqstp->rq_client, current_fh, 290 &rqstp->rq_chandle); 291 if (!status) 292 status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export)); 293 return status; 294 } 295 296 static inline int 297 nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh) 298 { 299 if (!save_fh->fh_dentry) 300 return nfserr_restorefh; 301 302 fh_dup2(current_fh, save_fh); 303 return nfs_ok; 304 } 305 306 static inline int 307 nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh) 308 { 309 if (!current_fh->fh_dentry) 310 return nfserr_nofilehandle; 311 312 fh_dup2(save_fh, current_fh); 313 return nfs_ok; 314 } 315 316 /* 317 * misc nfsv4 ops 318 */ 319 static inline int 320 nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access) 321 { 322 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 323 return nfserr_inval; 324 325 access->ac_resp_access = access->ac_req_access; 326 return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported); 327 } 328 329 static inline int 330 nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit) 331 { 332 int status; 333 334 u32 *p = (u32 *)commit->co_verf.data; 335 *p++ = nfssvc_boot.tv_sec; 336 *p++ = nfssvc_boot.tv_usec; 337 338 status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count); 339 if (status == nfserr_symlink) 340 status = nfserr_inval; 341 return status; 342 } 343 344 static int 345 nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create) 346 { 347 struct svc_fh resfh; 348 int status; 349 dev_t rdev; 350 351 fh_init(&resfh, NFS4_FHSIZE); 352 353 status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE); 354 if (status == nfserr_symlink) 355 status = nfserr_notdir; 356 if (status) 357 return status; 358 359 switch (create->cr_type) { 360 case NF4LNK: 361 /* ugh! we have to null-terminate the linktext, or 362 * vfs_symlink() will choke. it is always safe to 363 * null-terminate by brute force, since at worst we 364 * will overwrite the first byte of the create namelen 365 * in the XDR buffer, which has already been extracted 366 * during XDR decode. 367 */ 368 create->cr_linkname[create->cr_linklen] = 0; 369 370 status = nfsd_symlink(rqstp, current_fh, create->cr_name, 371 create->cr_namelen, create->cr_linkname, 372 create->cr_linklen, &resfh, &create->cr_iattr); 373 break; 374 375 case NF4BLK: 376 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 377 if (MAJOR(rdev) != create->cr_specdata1 || 378 MINOR(rdev) != create->cr_specdata2) 379 return nfserr_inval; 380 status = nfsd_create(rqstp, current_fh, create->cr_name, 381 create->cr_namelen, &create->cr_iattr, 382 S_IFBLK, rdev, &resfh); 383 break; 384 385 case NF4CHR: 386 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 387 if (MAJOR(rdev) != create->cr_specdata1 || 388 MINOR(rdev) != create->cr_specdata2) 389 return nfserr_inval; 390 status = nfsd_create(rqstp, current_fh, create->cr_name, 391 create->cr_namelen, &create->cr_iattr, 392 S_IFCHR, rdev, &resfh); 393 break; 394 395 case NF4SOCK: 396 status = nfsd_create(rqstp, current_fh, create->cr_name, 397 create->cr_namelen, &create->cr_iattr, 398 S_IFSOCK, 0, &resfh); 399 break; 400 401 case NF4FIFO: 402 status = nfsd_create(rqstp, current_fh, create->cr_name, 403 create->cr_namelen, &create->cr_iattr, 404 S_IFIFO, 0, &resfh); 405 break; 406 407 case NF4DIR: 408 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 409 status = nfsd_create(rqstp, current_fh, create->cr_name, 410 create->cr_namelen, &create->cr_iattr, 411 S_IFDIR, 0, &resfh); 412 break; 413 414 default: 415 status = nfserr_badtype; 416 } 417 418 if (!status) { 419 fh_unlock(current_fh); 420 set_change_info(&create->cr_cinfo, current_fh); 421 fh_dup2(current_fh, &resfh); 422 } 423 424 fh_put(&resfh); 425 return status; 426 } 427 428 static inline int 429 nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr) 430 { 431 int status; 432 433 status = fh_verify(rqstp, current_fh, 0, MAY_NOP); 434 if (status) 435 return status; 436 437 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 438 return nfserr_inval; 439 440 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; 441 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; 442 443 getattr->ga_fhp = current_fh; 444 return nfs_ok; 445 } 446 447 static inline int 448 nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh, 449 struct svc_fh *save_fh, struct nfsd4_link *link) 450 { 451 int status = nfserr_nofilehandle; 452 453 if (!save_fh->fh_dentry) 454 return status; 455 status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh); 456 if (!status) 457 set_change_info(&link->li_cinfo, current_fh); 458 return status; 459 } 460 461 static int 462 nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh) 463 { 464 struct svc_fh tmp_fh; 465 int ret; 466 467 fh_init(&tmp_fh, NFS4_FHSIZE); 468 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh, 469 &rqstp->rq_chandle)) != 0) 470 return ret; 471 if (tmp_fh.fh_dentry == current_fh->fh_dentry) { 472 fh_put(&tmp_fh); 473 return nfserr_noent; 474 } 475 fh_put(&tmp_fh); 476 return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh); 477 } 478 479 static inline int 480 nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup) 481 { 482 return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh); 483 } 484 485 static inline int 486 nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read) 487 { 488 int status; 489 490 /* no need to check permission - this will be done in nfsd_read() */ 491 492 read->rd_filp = NULL; 493 if (read->rd_offset >= OFFSET_MAX) 494 return nfserr_inval; 495 496 nfs4_lock_state(); 497 /* check stateid */ 498 if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid, 499 CHECK_FH | RD_STATE, &read->rd_filp))) { 500 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 501 goto out; 502 } 503 if (read->rd_filp) 504 get_file(read->rd_filp); 505 status = nfs_ok; 506 out: 507 nfs4_unlock_state(); 508 read->rd_rqstp = rqstp; 509 read->rd_fhp = current_fh; 510 return status; 511 } 512 513 static inline int 514 nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir) 515 { 516 u64 cookie = readdir->rd_cookie; 517 static const nfs4_verifier zeroverf; 518 519 /* no need to check permission - this will be done in nfsd_readdir() */ 520 521 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 522 return nfserr_inval; 523 524 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; 525 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; 526 527 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 528 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 529 return nfserr_bad_cookie; 530 531 readdir->rd_rqstp = rqstp; 532 readdir->rd_fhp = current_fh; 533 return nfs_ok; 534 } 535 536 static inline int 537 nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink) 538 { 539 readlink->rl_rqstp = rqstp; 540 readlink->rl_fhp = current_fh; 541 return nfs_ok; 542 } 543 544 static inline int 545 nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove) 546 { 547 int status; 548 549 if (nfs4_in_grace()) 550 return nfserr_grace; 551 status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen); 552 if (status == nfserr_symlink) 553 return nfserr_notdir; 554 if (!status) { 555 fh_unlock(current_fh); 556 set_change_info(&remove->rm_cinfo, current_fh); 557 } 558 return status; 559 } 560 561 static inline int 562 nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh, 563 struct svc_fh *save_fh, struct nfsd4_rename *rename) 564 { 565 int status = nfserr_nofilehandle; 566 567 if (!save_fh->fh_dentry) 568 return status; 569 if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags 570 & NFSEXP_NOSUBTREECHECK)) 571 return nfserr_grace; 572 status = nfsd_rename(rqstp, save_fh, rename->rn_sname, 573 rename->rn_snamelen, current_fh, 574 rename->rn_tname, rename->rn_tnamelen); 575 576 /* the underlying filesystem returns different error's than required 577 * by NFSv4. both save_fh and current_fh have been verified.. */ 578 if (status == nfserr_isdir) 579 status = nfserr_exist; 580 else if ((status == nfserr_notdir) && 581 (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) && 582 S_ISDIR(current_fh->fh_dentry->d_inode->i_mode))) 583 status = nfserr_exist; 584 else if (status == nfserr_symlink) 585 status = nfserr_notdir; 586 587 if (!status) { 588 set_change_info(&rename->rn_sinfo, current_fh); 589 set_change_info(&rename->rn_tinfo, save_fh); 590 } 591 return status; 592 } 593 594 static inline int 595 nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr) 596 { 597 int status = nfs_ok; 598 599 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 600 nfs4_lock_state(); 601 status = nfs4_preprocess_stateid_op(current_fh, 602 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL); 603 nfs4_unlock_state(); 604 if (status) { 605 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!"); 606 return status; 607 } 608 } 609 status = nfs_ok; 610 if (setattr->sa_acl != NULL) 611 status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl); 612 if (status) 613 return status; 614 status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr, 615 0, (time_t)0); 616 return status; 617 } 618 619 static inline int 620 nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write) 621 { 622 stateid_t *stateid = &write->wr_stateid; 623 struct file *filp = NULL; 624 u32 *p; 625 int status = nfs_ok; 626 627 /* no need to check permission - this will be done in nfsd_write() */ 628 629 if (write->wr_offset >= OFFSET_MAX) 630 return nfserr_inval; 631 632 nfs4_lock_state(); 633 status = nfs4_preprocess_stateid_op(current_fh, stateid, 634 CHECK_FH | WR_STATE, &filp); 635 if (filp) 636 get_file(filp); 637 nfs4_unlock_state(); 638 639 if (status) { 640 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 641 return status; 642 } 643 644 write->wr_bytes_written = write->wr_buflen; 645 write->wr_how_written = write->wr_stable_how; 646 p = (u32 *)write->wr_verifier.data; 647 *p++ = nfssvc_boot.tv_sec; 648 *p++ = nfssvc_boot.tv_usec; 649 650 status = nfsd_write(rqstp, current_fh, filp, write->wr_offset, 651 write->wr_vec, write->wr_vlen, write->wr_buflen, 652 &write->wr_how_written); 653 if (filp) 654 fput(filp); 655 656 if (status == nfserr_symlink) 657 status = nfserr_inval; 658 return status; 659 } 660 661 /* This routine never returns NFS_OK! If there are no other errors, it 662 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 663 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 664 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 665 */ 666 static int 667 nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify) 668 { 669 u32 *buf, *p; 670 int count; 671 int status; 672 673 status = fh_verify(rqstp, current_fh, 0, MAY_NOP); 674 if (status) 675 return status; 676 677 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) 678 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 679 return nfserr_attrnotsupp; 680 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 681 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 682 return nfserr_inval; 683 if (verify->ve_attrlen & 3) 684 return nfserr_inval; 685 686 /* count in words: 687 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 688 */ 689 count = 4 + (verify->ve_attrlen >> 2); 690 buf = kmalloc(count << 2, GFP_KERNEL); 691 if (!buf) 692 return nfserr_resource; 693 694 status = nfsd4_encode_fattr(current_fh, current_fh->fh_export, 695 current_fh->fh_dentry, buf, 696 &count, verify->ve_bmval, 697 rqstp); 698 699 /* this means that nfsd4_encode_fattr() ran out of space */ 700 if (status == nfserr_resource && count == 0) 701 status = nfserr_not_same; 702 if (status) 703 goto out_kfree; 704 705 p = buf + 3; 706 status = nfserr_not_same; 707 if (ntohl(*p++) != verify->ve_attrlen) 708 goto out_kfree; 709 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 710 status = nfserr_same; 711 712 out_kfree: 713 kfree(buf); 714 return status; 715 } 716 717 /* 718 * NULL call. 719 */ 720 static int 721 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 722 { 723 return nfs_ok; 724 } 725 726 727 /* 728 * COMPOUND call. 729 */ 730 static int 731 nfsd4_proc_compound(struct svc_rqst *rqstp, 732 struct nfsd4_compoundargs *args, 733 struct nfsd4_compoundres *resp) 734 { 735 struct nfsd4_op *op; 736 struct svc_fh *current_fh = NULL; 737 struct svc_fh *save_fh = NULL; 738 struct nfs4_stateowner *replay_owner = NULL; 739 int slack_space; /* in words, not bytes! */ 740 int status; 741 742 status = nfserr_resource; 743 current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL); 744 if (current_fh == NULL) 745 goto out; 746 fh_init(current_fh, NFS4_FHSIZE); 747 save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL); 748 if (save_fh == NULL) 749 goto out; 750 fh_init(save_fh, NFS4_FHSIZE); 751 752 resp->xbuf = &rqstp->rq_res; 753 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len; 754 resp->tagp = resp->p; 755 /* reserve space for: taglen, tag, and opcnt */ 756 resp->p += 2 + XDR_QUADLEN(args->taglen); 757 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 758 resp->taglen = args->taglen; 759 resp->tag = args->tag; 760 resp->opcnt = 0; 761 resp->rqstp = rqstp; 762 763 /* 764 * According to RFC3010, this takes precedence over all other errors. 765 */ 766 status = nfserr_minor_vers_mismatch; 767 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 768 goto out; 769 770 status = nfs_ok; 771 while (!status && resp->opcnt < args->opcnt) { 772 op = &args->ops[resp->opcnt++]; 773 774 dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum); 775 776 /* 777 * The XDR decode routines may have pre-set op->status; 778 * for example, if there is a miscellaneous XDR error 779 * it will be set to nfserr_bad_xdr. 780 */ 781 if (op->status) 782 goto encode_op; 783 784 /* We must be able to encode a successful response to 785 * this operation, with enough room left over to encode a 786 * failed response to the next operation. If we don't 787 * have enough room, fail with ERR_RESOURCE. 788 */ 789 /* FIXME - is slack_space *really* words, or bytes??? - neilb */ 790 slack_space = (char *)resp->end - (char *)resp->p; 791 if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) { 792 BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE); 793 op->status = nfserr_resource; 794 goto encode_op; 795 } 796 797 /* All operations except RENEW, SETCLIENTID, RESTOREFH 798 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH 799 * require a valid current filehandle 800 */ 801 if ((!current_fh->fh_dentry) && 802 !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) || 803 (op->opnum == OP_SETCLIENTID) || 804 (op->opnum == OP_SETCLIENTID_CONFIRM) || 805 (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) || 806 (op->opnum == OP_RELEASE_LOCKOWNER))) { 807 op->status = nfserr_nofilehandle; 808 goto encode_op; 809 } 810 switch (op->opnum) { 811 case OP_ACCESS: 812 op->status = nfsd4_access(rqstp, current_fh, &op->u.access); 813 break; 814 case OP_CLOSE: 815 op->status = nfsd4_close(rqstp, current_fh, &op->u.close, &replay_owner); 816 break; 817 case OP_COMMIT: 818 op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit); 819 break; 820 case OP_CREATE: 821 op->status = nfsd4_create(rqstp, current_fh, &op->u.create); 822 break; 823 case OP_DELEGRETURN: 824 op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn); 825 break; 826 case OP_GETATTR: 827 op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr); 828 break; 829 case OP_GETFH: 830 op->status = nfsd4_getfh(current_fh, &op->u.getfh); 831 break; 832 case OP_LINK: 833 op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link); 834 break; 835 case OP_LOCK: 836 op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock, &replay_owner); 837 break; 838 case OP_LOCKT: 839 op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt); 840 break; 841 case OP_LOCKU: 842 op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku, &replay_owner); 843 break; 844 case OP_LOOKUP: 845 op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup); 846 break; 847 case OP_LOOKUPP: 848 op->status = nfsd4_lookupp(rqstp, current_fh); 849 break; 850 case OP_NVERIFY: 851 op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify); 852 if (op->status == nfserr_not_same) 853 op->status = nfs_ok; 854 break; 855 case OP_OPEN: 856 op->status = nfsd4_open(rqstp, current_fh, &op->u.open, &replay_owner); 857 break; 858 case OP_OPEN_CONFIRM: 859 op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm, &replay_owner); 860 break; 861 case OP_OPEN_DOWNGRADE: 862 op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade, &replay_owner); 863 break; 864 case OP_PUTFH: 865 op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh); 866 break; 867 case OP_PUTROOTFH: 868 op->status = nfsd4_putrootfh(rqstp, current_fh); 869 break; 870 case OP_READ: 871 op->status = nfsd4_read(rqstp, current_fh, &op->u.read); 872 break; 873 case OP_READDIR: 874 op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir); 875 break; 876 case OP_READLINK: 877 op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink); 878 break; 879 case OP_REMOVE: 880 op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove); 881 break; 882 case OP_RENAME: 883 op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename); 884 break; 885 case OP_RENEW: 886 op->status = nfsd4_renew(&op->u.renew); 887 break; 888 case OP_RESTOREFH: 889 op->status = nfsd4_restorefh(current_fh, save_fh); 890 break; 891 case OP_SAVEFH: 892 op->status = nfsd4_savefh(current_fh, save_fh); 893 break; 894 case OP_SETATTR: 895 op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr); 896 break; 897 case OP_SETCLIENTID: 898 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid); 899 break; 900 case OP_SETCLIENTID_CONFIRM: 901 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm); 902 break; 903 case OP_VERIFY: 904 op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify); 905 if (op->status == nfserr_same) 906 op->status = nfs_ok; 907 break; 908 case OP_WRITE: 909 op->status = nfsd4_write(rqstp, current_fh, &op->u.write); 910 break; 911 case OP_RELEASE_LOCKOWNER: 912 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner); 913 break; 914 default: 915 BUG_ON(op->status == nfs_ok); 916 break; 917 } 918 919 encode_op: 920 if (op->status == NFSERR_REPLAY_ME) { 921 op->replay = &replay_owner->so_replay; 922 nfsd4_encode_replay(resp, op); 923 status = op->status = op->replay->rp_status; 924 } else { 925 nfsd4_encode_operation(resp, op); 926 status = op->status; 927 } 928 if (replay_owner && (replay_owner != (void *)(-1))) { 929 nfs4_put_stateowner(replay_owner); 930 replay_owner = NULL; 931 } 932 /* XXX Ugh, we need to get rid of this kind of special case: */ 933 if (op->opnum == OP_READ && op->u.read.rd_filp) 934 fput(op->u.read.rd_filp); 935 } 936 937 out: 938 nfsd4_release_compoundargs(args); 939 if (current_fh) 940 fh_put(current_fh); 941 kfree(current_fh); 942 if (save_fh) 943 fh_put(save_fh); 944 kfree(save_fh); 945 return status; 946 } 947 948 #define nfs4svc_decode_voidargs NULL 949 #define nfs4svc_release_void NULL 950 #define nfsd4_voidres nfsd4_voidargs 951 #define nfs4svc_release_compound NULL 952 struct nfsd4_voidargs { int dummy; }; 953 954 #define PROC(name, argt, rest, relt, cache, respsize) \ 955 { (svc_procfunc) nfsd4_proc_##name, \ 956 (kxdrproc_t) nfs4svc_decode_##argt##args, \ 957 (kxdrproc_t) nfs4svc_encode_##rest##res, \ 958 (kxdrproc_t) nfs4svc_release_##relt, \ 959 sizeof(struct nfsd4_##argt##args), \ 960 sizeof(struct nfsd4_##rest##res), \ 961 0, \ 962 cache, \ 963 respsize, \ 964 } 965 966 /* 967 * TODO: At the present time, the NFSv4 server does not do XID caching 968 * of requests. Implementing XID caching would not be a serious problem, 969 * although it would require a mild change in interfaces since one 970 * doesn't know whether an NFSv4 request is idempotent until after the 971 * XDR decode. However, XID caching totally confuses pynfs (Peter 972 * Astrand's regression testsuite for NFSv4 servers), which reuses 973 * XID's liberally, so I've left it unimplemented until pynfs generates 974 * better XID's. 975 */ 976 static struct svc_procedure nfsd_procedures4[2] = { 977 PROC(null, void, void, void, RC_NOCACHE, 1), 978 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE) 979 }; 980 981 struct svc_version nfsd_version4 = { 982 .vs_vers = 4, 983 .vs_nproc = 2, 984 .vs_proc = nfsd_procedures4, 985 .vs_dispatch = nfsd_dispatch, 986 .vs_xdrsize = NFS4_SVC_XDRSIZE, 987 }; 988 989 /* 990 * Local variables: 991 * c-basic-offset: 8 992 * End: 993 */ 994