1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/slab.h> 37 38 #include "idmap.h" 39 #include "cache.h" 40 #include "xdr4.h" 41 #include "vfs.h" 42 43 #define NFSDDBG_FACILITY NFSDDBG_PROC 44 45 static u32 nfsd_attrmask[] = { 46 NFSD_WRITEABLE_ATTRS_WORD0, 47 NFSD_WRITEABLE_ATTRS_WORD1, 48 NFSD_WRITEABLE_ATTRS_WORD2 49 }; 50 51 static u32 nfsd41_ex_attrmask[] = { 52 NFSD_SUPPATTR_EXCLCREAT_WORD0, 53 NFSD_SUPPATTR_EXCLCREAT_WORD1, 54 NFSD_SUPPATTR_EXCLCREAT_WORD2 55 }; 56 57 static __be32 58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 59 u32 *bmval, u32 *writable) 60 { 61 struct dentry *dentry = cstate->current_fh.fh_dentry; 62 63 /* 64 * Check about attributes are supported by the NFSv4 server or not. 65 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 66 */ 67 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 68 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 69 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 70 return nfserr_attrnotsupp; 71 72 /* 73 * Check FATTR4_WORD0_ACL can be supported 74 * in current environment or not. 75 */ 76 if (bmval[0] & FATTR4_WORD0_ACL) { 77 if (!IS_POSIXACL(dentry->d_inode)) 78 return nfserr_attrnotsupp; 79 } 80 81 /* 82 * According to spec, read-only attributes return ERR_INVAL. 83 */ 84 if (writable) { 85 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 86 (bmval[2] & ~writable[2])) 87 return nfserr_inval; 88 } 89 90 return nfs_ok; 91 } 92 93 static __be32 94 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 95 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 96 { 97 __be32 status = nfs_ok; 98 99 if (open->op_create == NFS4_OPEN_CREATE) { 100 if (open->op_createmode == NFS4_CREATE_UNCHECKED 101 || open->op_createmode == NFS4_CREATE_GUARDED) 102 status = check_attr_support(rqstp, cstate, 103 open->op_bmval, nfsd_attrmask); 104 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 105 status = check_attr_support(rqstp, cstate, 106 open->op_bmval, nfsd41_ex_attrmask); 107 } 108 109 return status; 110 } 111 112 static int 113 is_create_with_attrs(struct nfsd4_open *open) 114 { 115 return open->op_create == NFS4_OPEN_CREATE 116 && (open->op_createmode == NFS4_CREATE_UNCHECKED 117 || open->op_createmode == NFS4_CREATE_GUARDED 118 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 119 } 120 121 /* 122 * if error occurs when setting the acl, just clear the acl bit 123 * in the returned attr bitmap. 124 */ 125 static void 126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 127 struct nfs4_acl *acl, u32 *bmval) 128 { 129 __be32 status; 130 131 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 132 if (status) 133 /* 134 * We should probably fail the whole open at this point, 135 * but we've already created the file, so it's too late; 136 * So this seems the least of evils: 137 */ 138 bmval[0] &= ~FATTR4_WORD0_ACL; 139 } 140 141 static inline void 142 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 143 { 144 fh_put(dst); 145 dget(src->fh_dentry); 146 if (src->fh_export) 147 cache_get(&src->fh_export->h); 148 *dst = *src; 149 } 150 151 static __be32 152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 153 { 154 __be32 status; 155 156 if (open->op_truncate && 157 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 158 return nfserr_inval; 159 160 accmode |= NFSD_MAY_READ_IF_EXEC; 161 162 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 163 accmode |= NFSD_MAY_READ; 164 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 165 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 166 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 167 accmode |= NFSD_MAY_WRITE; 168 169 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 170 171 return status; 172 } 173 174 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 175 { 176 umode_t mode = fh->fh_dentry->d_inode->i_mode; 177 178 if (S_ISREG(mode)) 179 return nfs_ok; 180 if (S_ISDIR(mode)) 181 return nfserr_isdir; 182 /* 183 * Using err_symlink as our catch-all case may look odd; but 184 * there's no other obvious error for this case in 4.0, and we 185 * happen to know that it will cause the linux v4 client to do 186 * the right thing on attempts to open something other than a 187 * regular file. 188 */ 189 return nfserr_symlink; 190 } 191 192 static __be32 193 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 194 { 195 struct svc_fh resfh; 196 __be32 status; 197 198 fh_init(&resfh, NFS4_FHSIZE); 199 open->op_truncate = 0; 200 201 if (open->op_create) { 202 /* FIXME: check session persistence and pnfs flags. 203 * The nfsv4.1 spec requires the following semantics: 204 * 205 * Persistent | pNFS | Server REQUIRED | Client Allowed 206 * Reply Cache | server | | 207 * -------------+--------+-----------------+-------------------- 208 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 209 * | | | (SHOULD) 210 * | | and EXCLUSIVE4 | or EXCLUSIVE4 211 * | | | (SHOULD NOT) 212 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 213 * yes | no | GUARDED4 | GUARDED4 214 * yes | yes | GUARDED4 | GUARDED4 215 */ 216 217 /* 218 * Note: create modes (UNCHECKED,GUARDED...) are the same 219 * in NFSv4 as in v3 except EXCLUSIVE4_1. 220 */ 221 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 222 open->op_fname.len, &open->op_iattr, 223 &resfh, open->op_createmode, 224 (u32 *)open->op_verf.data, 225 &open->op_truncate, &open->op_created); 226 227 /* 228 * Following rfc 3530 14.2.16, use the returned bitmask 229 * to indicate which attributes we used to store the 230 * verifier: 231 */ 232 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 233 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 234 FATTR4_WORD1_TIME_MODIFY); 235 } else { 236 status = nfsd_lookup(rqstp, current_fh, 237 open->op_fname.data, open->op_fname.len, &resfh); 238 fh_unlock(current_fh); 239 if (status) 240 goto out; 241 status = nfsd_check_obj_isreg(&resfh); 242 } 243 if (status) 244 goto out; 245 246 if (is_create_with_attrs(open) && open->op_acl != NULL) 247 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); 248 249 set_change_info(&open->op_cinfo, current_fh); 250 fh_dup2(current_fh, &resfh); 251 252 /* set reply cache */ 253 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 254 &resfh.fh_handle); 255 if (!open->op_created) 256 status = do_open_permission(rqstp, current_fh, open, 257 NFSD_MAY_NOP); 258 259 out: 260 fh_put(&resfh); 261 return status; 262 } 263 264 static __be32 265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 266 { 267 __be32 status; 268 269 /* Only reclaims from previously confirmed clients are valid */ 270 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 271 return status; 272 273 /* We don't know the target directory, and therefore can not 274 * set the change info 275 */ 276 277 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 278 279 /* set replay cache */ 280 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 281 ¤t_fh->fh_handle); 282 283 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 284 (open->op_iattr.ia_size == 0); 285 286 status = do_open_permission(rqstp, current_fh, open, 287 NFSD_MAY_OWNER_OVERRIDE); 288 289 return status; 290 } 291 292 static void 293 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 294 { 295 struct nfsd4_sessionid *sid = 296 (struct nfsd4_sessionid *)session->se_sessionid.data; 297 298 clid->cl_boot = sid->clientid.cl_boot; 299 clid->cl_id = sid->clientid.cl_id; 300 } 301 302 static __be32 303 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 304 struct nfsd4_open *open) 305 { 306 __be32 status; 307 struct nfsd4_compoundres *resp; 308 309 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 310 (int)open->op_fname.len, open->op_fname.data, 311 open->op_openowner); 312 313 /* This check required by spec. */ 314 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 315 return nfserr_inval; 316 317 /* We don't yet support WANT bits: */ 318 open->op_share_access &= NFS4_SHARE_ACCESS_MASK; 319 320 open->op_created = 0; 321 /* 322 * RFC5661 18.51.3 323 * Before RECLAIM_COMPLETE done, server should deny new lock 324 */ 325 if (nfsd4_has_session(cstate) && 326 !cstate->session->se_client->cl_firststate && 327 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 328 return nfserr_grace; 329 330 if (nfsd4_has_session(cstate)) 331 copy_clientid(&open->op_clientid, cstate->session); 332 333 nfs4_lock_state(); 334 335 /* check seqid for replay. set nfs4_owner */ 336 resp = rqstp->rq_resp; 337 status = nfsd4_process_open1(&resp->cstate, open); 338 if (status == nfserr_replay_me) { 339 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 340 fh_put(&cstate->current_fh); 341 fh_copy_shallow(&cstate->current_fh.fh_handle, 342 &rp->rp_openfh); 343 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 344 if (status) 345 dprintk("nfsd4_open: replay failed" 346 " restoring previous filehandle\n"); 347 else 348 status = nfserr_replay_me; 349 } 350 if (status) 351 goto out; 352 353 status = nfsd4_check_open_attributes(rqstp, cstate, open); 354 if (status) 355 goto out; 356 357 /* Openowner is now set, so sequence id will get bumped. Now we need 358 * these checks before we do any creates: */ 359 status = nfserr_grace; 360 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 361 goto out; 362 status = nfserr_no_grace; 363 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 364 goto out; 365 366 switch (open->op_claim_type) { 367 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 368 case NFS4_OPEN_CLAIM_NULL: 369 status = do_open_lookup(rqstp, &cstate->current_fh, 370 open); 371 if (status) 372 goto out; 373 break; 374 case NFS4_OPEN_CLAIM_PREVIOUS: 375 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 376 case NFS4_OPEN_CLAIM_FH: 377 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 378 status = do_open_fhandle(rqstp, &cstate->current_fh, 379 open); 380 if (status) 381 goto out; 382 break; 383 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 384 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 385 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 386 dprintk("NFSD: unsupported OPEN claim type %d\n", 387 open->op_claim_type); 388 status = nfserr_notsupp; 389 goto out; 390 default: 391 dprintk("NFSD: Invalid OPEN claim type %d\n", 392 open->op_claim_type); 393 status = nfserr_inval; 394 goto out; 395 } 396 /* 397 * nfsd4_process_open2() does the actual opening of the file. If 398 * successful, it (1) truncates the file if open->op_truncate was 399 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 400 */ 401 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 402 WARN_ON(status && open->op_created); 403 out: 404 nfsd4_cleanup_open_state(open, status); 405 if (open->op_openowner) 406 cstate->replay_owner = &open->op_openowner->oo_owner; 407 else 408 nfs4_unlock_state(); 409 return status; 410 } 411 412 /* 413 * filehandle-manipulating ops. 414 */ 415 static __be32 416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 417 struct svc_fh **getfh) 418 { 419 if (!cstate->current_fh.fh_dentry) 420 return nfserr_nofilehandle; 421 422 *getfh = &cstate->current_fh; 423 return nfs_ok; 424 } 425 426 static __be32 427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 428 struct nfsd4_putfh *putfh) 429 { 430 fh_put(&cstate->current_fh); 431 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 432 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 433 putfh->pf_fhlen); 434 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 435 } 436 437 static __be32 438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 439 void *arg) 440 { 441 __be32 status; 442 443 fh_put(&cstate->current_fh); 444 status = exp_pseudoroot(rqstp, &cstate->current_fh); 445 return status; 446 } 447 448 static __be32 449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 450 void *arg) 451 { 452 if (!cstate->save_fh.fh_dentry) 453 return nfserr_restorefh; 454 455 fh_dup2(&cstate->current_fh, &cstate->save_fh); 456 return nfs_ok; 457 } 458 459 static __be32 460 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 461 void *arg) 462 { 463 if (!cstate->current_fh.fh_dentry) 464 return nfserr_nofilehandle; 465 466 fh_dup2(&cstate->save_fh, &cstate->current_fh); 467 return nfs_ok; 468 } 469 470 /* 471 * misc nfsv4 ops 472 */ 473 static __be32 474 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 475 struct nfsd4_access *access) 476 { 477 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 478 return nfserr_inval; 479 480 access->ac_resp_access = access->ac_req_access; 481 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 482 &access->ac_supported); 483 } 484 485 static __be32 486 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 487 struct nfsd4_commit *commit) 488 { 489 u32 *p = (u32 *)commit->co_verf.data; 490 *p++ = nfssvc_boot.tv_sec; 491 *p++ = nfssvc_boot.tv_usec; 492 493 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 494 commit->co_count); 495 } 496 497 static __be32 498 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 499 struct nfsd4_create *create) 500 { 501 struct svc_fh resfh; 502 __be32 status; 503 dev_t rdev; 504 505 fh_init(&resfh, NFS4_FHSIZE); 506 507 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 508 NFSD_MAY_CREATE); 509 if (status) 510 return status; 511 512 status = check_attr_support(rqstp, cstate, create->cr_bmval, 513 nfsd_attrmask); 514 if (status) 515 return status; 516 517 switch (create->cr_type) { 518 case NF4LNK: 519 /* ugh! we have to null-terminate the linktext, or 520 * vfs_symlink() will choke. it is always safe to 521 * null-terminate by brute force, since at worst we 522 * will overwrite the first byte of the create namelen 523 * in the XDR buffer, which has already been extracted 524 * during XDR decode. 525 */ 526 create->cr_linkname[create->cr_linklen] = 0; 527 528 status = nfsd_symlink(rqstp, &cstate->current_fh, 529 create->cr_name, create->cr_namelen, 530 create->cr_linkname, create->cr_linklen, 531 &resfh, &create->cr_iattr); 532 break; 533 534 case NF4BLK: 535 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 536 if (MAJOR(rdev) != create->cr_specdata1 || 537 MINOR(rdev) != create->cr_specdata2) 538 return nfserr_inval; 539 status = nfsd_create(rqstp, &cstate->current_fh, 540 create->cr_name, create->cr_namelen, 541 &create->cr_iattr, S_IFBLK, rdev, &resfh); 542 break; 543 544 case NF4CHR: 545 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 546 if (MAJOR(rdev) != create->cr_specdata1 || 547 MINOR(rdev) != create->cr_specdata2) 548 return nfserr_inval; 549 status = nfsd_create(rqstp, &cstate->current_fh, 550 create->cr_name, create->cr_namelen, 551 &create->cr_iattr,S_IFCHR, rdev, &resfh); 552 break; 553 554 case NF4SOCK: 555 status = nfsd_create(rqstp, &cstate->current_fh, 556 create->cr_name, create->cr_namelen, 557 &create->cr_iattr, S_IFSOCK, 0, &resfh); 558 break; 559 560 case NF4FIFO: 561 status = nfsd_create(rqstp, &cstate->current_fh, 562 create->cr_name, create->cr_namelen, 563 &create->cr_iattr, S_IFIFO, 0, &resfh); 564 break; 565 566 case NF4DIR: 567 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 568 status = nfsd_create(rqstp, &cstate->current_fh, 569 create->cr_name, create->cr_namelen, 570 &create->cr_iattr, S_IFDIR, 0, &resfh); 571 break; 572 573 default: 574 status = nfserr_badtype; 575 } 576 577 if (status) 578 goto out; 579 580 if (create->cr_acl != NULL) 581 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 582 create->cr_bmval); 583 584 fh_unlock(&cstate->current_fh); 585 set_change_info(&create->cr_cinfo, &cstate->current_fh); 586 fh_dup2(&cstate->current_fh, &resfh); 587 out: 588 fh_put(&resfh); 589 return status; 590 } 591 592 static __be32 593 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 594 struct nfsd4_getattr *getattr) 595 { 596 __be32 status; 597 598 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 599 if (status) 600 return status; 601 602 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 603 return nfserr_inval; 604 605 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 606 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 607 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 608 609 getattr->ga_fhp = &cstate->current_fh; 610 return nfs_ok; 611 } 612 613 static __be32 614 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 615 struct nfsd4_link *link) 616 { 617 __be32 status = nfserr_nofilehandle; 618 619 if (!cstate->save_fh.fh_dentry) 620 return status; 621 status = nfsd_link(rqstp, &cstate->current_fh, 622 link->li_name, link->li_namelen, &cstate->save_fh); 623 if (!status) 624 set_change_info(&link->li_cinfo, &cstate->current_fh); 625 return status; 626 } 627 628 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 629 { 630 struct svc_fh tmp_fh; 631 __be32 ret; 632 633 fh_init(&tmp_fh, NFS4_FHSIZE); 634 ret = exp_pseudoroot(rqstp, &tmp_fh); 635 if (ret) 636 return ret; 637 if (tmp_fh.fh_dentry == fh->fh_dentry) { 638 fh_put(&tmp_fh); 639 return nfserr_noent; 640 } 641 fh_put(&tmp_fh); 642 return nfsd_lookup(rqstp, fh, "..", 2, fh); 643 } 644 645 static __be32 646 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 647 void *arg) 648 { 649 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 650 } 651 652 static __be32 653 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 654 struct nfsd4_lookup *lookup) 655 { 656 return nfsd_lookup(rqstp, &cstate->current_fh, 657 lookup->lo_name, lookup->lo_len, 658 &cstate->current_fh); 659 } 660 661 static __be32 662 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 663 struct nfsd4_read *read) 664 { 665 __be32 status; 666 667 /* no need to check permission - this will be done in nfsd_read() */ 668 669 read->rd_filp = NULL; 670 if (read->rd_offset >= OFFSET_MAX) 671 return nfserr_inval; 672 673 nfs4_lock_state(); 674 /* check stateid */ 675 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 676 RD_STATE, &read->rd_filp))) { 677 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 678 goto out; 679 } 680 if (read->rd_filp) 681 get_file(read->rd_filp); 682 status = nfs_ok; 683 out: 684 nfs4_unlock_state(); 685 read->rd_rqstp = rqstp; 686 read->rd_fhp = &cstate->current_fh; 687 return status; 688 } 689 690 static __be32 691 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 692 struct nfsd4_readdir *readdir) 693 { 694 u64 cookie = readdir->rd_cookie; 695 static const nfs4_verifier zeroverf; 696 697 /* no need to check permission - this will be done in nfsd_readdir() */ 698 699 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 700 return nfserr_inval; 701 702 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 703 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 704 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 705 706 if ((cookie == 1) || (cookie == 2) || 707 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 708 return nfserr_bad_cookie; 709 710 readdir->rd_rqstp = rqstp; 711 readdir->rd_fhp = &cstate->current_fh; 712 return nfs_ok; 713 } 714 715 static __be32 716 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 717 struct nfsd4_readlink *readlink) 718 { 719 readlink->rl_rqstp = rqstp; 720 readlink->rl_fhp = &cstate->current_fh; 721 return nfs_ok; 722 } 723 724 static __be32 725 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 726 struct nfsd4_remove *remove) 727 { 728 __be32 status; 729 730 if (locks_in_grace()) 731 return nfserr_grace; 732 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 733 remove->rm_name, remove->rm_namelen); 734 if (!status) { 735 fh_unlock(&cstate->current_fh); 736 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 737 } 738 return status; 739 } 740 741 static __be32 742 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 struct nfsd4_rename *rename) 744 { 745 __be32 status = nfserr_nofilehandle; 746 747 if (!cstate->save_fh.fh_dentry) 748 return status; 749 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 750 & NFSEXP_NOSUBTREECHECK)) 751 return nfserr_grace; 752 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 753 rename->rn_snamelen, &cstate->current_fh, 754 rename->rn_tname, rename->rn_tnamelen); 755 756 /* the underlying filesystem returns different error's than required 757 * by NFSv4. both save_fh and current_fh have been verified.. */ 758 if (status == nfserr_isdir) 759 status = nfserr_exist; 760 else if ((status == nfserr_notdir) && 761 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 762 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 763 status = nfserr_exist; 764 765 if (!status) { 766 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 767 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 768 } 769 return status; 770 } 771 772 static __be32 773 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 774 struct nfsd4_secinfo *secinfo) 775 { 776 struct svc_fh resfh; 777 struct svc_export *exp; 778 struct dentry *dentry; 779 __be32 err; 780 781 fh_init(&resfh, NFS4_FHSIZE); 782 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 783 if (err) 784 return err; 785 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 786 secinfo->si_name, secinfo->si_namelen, 787 &exp, &dentry); 788 if (err) 789 return err; 790 if (dentry->d_inode == NULL) { 791 exp_put(exp); 792 err = nfserr_noent; 793 } else 794 secinfo->si_exp = exp; 795 dput(dentry); 796 if (cstate->minorversion) 797 /* See rfc 5661 section 2.6.3.1.1.8 */ 798 fh_put(&cstate->current_fh); 799 return err; 800 } 801 802 static __be32 803 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 804 struct nfsd4_secinfo_no_name *sin) 805 { 806 __be32 err; 807 808 switch (sin->sin_style) { 809 case NFS4_SECINFO_STYLE4_CURRENT_FH: 810 break; 811 case NFS4_SECINFO_STYLE4_PARENT: 812 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 813 if (err) 814 return err; 815 break; 816 default: 817 return nfserr_inval; 818 } 819 exp_get(cstate->current_fh.fh_export); 820 sin->sin_exp = cstate->current_fh.fh_export; 821 fh_put(&cstate->current_fh); 822 return nfs_ok; 823 } 824 825 static __be32 826 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 827 struct nfsd4_setattr *setattr) 828 { 829 __be32 status = nfs_ok; 830 831 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 832 nfs4_lock_state(); 833 status = nfs4_preprocess_stateid_op(cstate, 834 &setattr->sa_stateid, WR_STATE, NULL); 835 nfs4_unlock_state(); 836 if (status) { 837 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 838 return status; 839 } 840 } 841 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 842 if (status) 843 return status; 844 status = nfs_ok; 845 846 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 847 nfsd_attrmask); 848 if (status) 849 goto out; 850 851 if (setattr->sa_acl != NULL) 852 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 853 setattr->sa_acl); 854 if (status) 855 goto out; 856 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 857 0, (time_t)0); 858 out: 859 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 860 return status; 861 } 862 863 static __be32 864 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 865 struct nfsd4_write *write) 866 { 867 stateid_t *stateid = &write->wr_stateid; 868 struct file *filp = NULL; 869 u32 *p; 870 __be32 status = nfs_ok; 871 unsigned long cnt; 872 873 /* no need to check permission - this will be done in nfsd_write() */ 874 875 if (write->wr_offset >= OFFSET_MAX) 876 return nfserr_inval; 877 878 nfs4_lock_state(); 879 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 880 if (filp) 881 get_file(filp); 882 nfs4_unlock_state(); 883 884 if (status) { 885 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 886 return status; 887 } 888 889 cnt = write->wr_buflen; 890 write->wr_how_written = write->wr_stable_how; 891 p = (u32 *)write->wr_verifier.data; 892 *p++ = nfssvc_boot.tv_sec; 893 *p++ = nfssvc_boot.tv_usec; 894 895 status = nfsd_write(rqstp, &cstate->current_fh, filp, 896 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 897 &cnt, &write->wr_how_written); 898 if (filp) 899 fput(filp); 900 901 write->wr_bytes_written = cnt; 902 903 return status; 904 } 905 906 /* This routine never returns NFS_OK! If there are no other errors, it 907 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 908 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 909 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 910 */ 911 static __be32 912 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 913 struct nfsd4_verify *verify) 914 { 915 __be32 *buf, *p; 916 int count; 917 __be32 status; 918 919 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 920 if (status) 921 return status; 922 923 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 924 if (status) 925 return status; 926 927 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 928 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 929 return nfserr_inval; 930 if (verify->ve_attrlen & 3) 931 return nfserr_inval; 932 933 /* count in words: 934 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 935 */ 936 count = 4 + (verify->ve_attrlen >> 2); 937 buf = kmalloc(count << 2, GFP_KERNEL); 938 if (!buf) 939 return nfserr_jukebox; 940 941 status = nfsd4_encode_fattr(&cstate->current_fh, 942 cstate->current_fh.fh_export, 943 cstate->current_fh.fh_dentry, buf, 944 &count, verify->ve_bmval, 945 rqstp, 0); 946 947 /* this means that nfsd4_encode_fattr() ran out of space */ 948 if (status == nfserr_resource && count == 0) 949 status = nfserr_not_same; 950 if (status) 951 goto out_kfree; 952 953 /* skip bitmap */ 954 p = buf + 1 + ntohl(buf[0]); 955 status = nfserr_not_same; 956 if (ntohl(*p++) != verify->ve_attrlen) 957 goto out_kfree; 958 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 959 status = nfserr_same; 960 961 out_kfree: 962 kfree(buf); 963 return status; 964 } 965 966 static __be32 967 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 968 struct nfsd4_verify *verify) 969 { 970 __be32 status; 971 972 status = _nfsd4_verify(rqstp, cstate, verify); 973 return status == nfserr_not_same ? nfs_ok : status; 974 } 975 976 static __be32 977 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 978 struct nfsd4_verify *verify) 979 { 980 __be32 status; 981 982 status = _nfsd4_verify(rqstp, cstate, verify); 983 return status == nfserr_same ? nfs_ok : status; 984 } 985 986 /* 987 * NULL call. 988 */ 989 static __be32 990 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 991 { 992 return nfs_ok; 993 } 994 995 static inline void nfsd4_increment_op_stats(u32 opnum) 996 { 997 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 998 nfsdstats.nfs4_opcount[opnum]++; 999 } 1000 1001 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1002 void *); 1003 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1004 1005 enum nfsd4_op_flags { 1006 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1007 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1008 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1009 /* For rfc 5661 section 2.6.3.1.1: */ 1010 OP_HANDLES_WRONGSEC = 1 << 3, 1011 OP_IS_PUTFH_LIKE = 1 << 4, 1012 /* 1013 * These are the ops whose result size we estimate before 1014 * encoding, to avoid performing an op then not being able to 1015 * respond or cache a response. This includes writes and setattrs 1016 * as well as the operations usually called "nonidempotent": 1017 */ 1018 OP_MODIFIES_SOMETHING = 1 << 5, 1019 /* 1020 * Cache compounds containing these ops in the xid-based drc: 1021 * We use the DRC for compounds containing non-idempotent 1022 * operations, *except* those that are 4.1-specific (since 1023 * sessions provide their own EOS), and except for stateful 1024 * operations other than setclientid and setclientid_confirm 1025 * (since sequence numbers provide EOS for open, lock, etc in 1026 * the v4.0 case). 1027 */ 1028 OP_CACHEME = 1 << 6, 1029 }; 1030 1031 struct nfsd4_operation { 1032 nfsd4op_func op_func; 1033 u32 op_flags; 1034 char *op_name; 1035 /* Try to get response size before operation */ 1036 nfsd4op_rsize op_rsize_bop; 1037 }; 1038 1039 static struct nfsd4_operation nfsd4_ops[]; 1040 1041 static const char *nfsd4_op_name(unsigned opnum); 1042 1043 /* 1044 * Enforce NFSv4.1 COMPOUND ordering rules: 1045 * 1046 * Also note, enforced elsewhere: 1047 * - SEQUENCE other than as first op results in 1048 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1049 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1050 * (Enforced in nfsd4_bind_conn_to_session().) 1051 * - DESTROY_SESSION must be the final operation in a compound, if 1052 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1053 * (Enforced in nfsd4_destroy_session().) 1054 */ 1055 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1056 { 1057 struct nfsd4_op *op = &args->ops[0]; 1058 1059 /* These ordering requirements don't apply to NFSv4.0: */ 1060 if (args->minorversion == 0) 1061 return nfs_ok; 1062 /* This is weird, but OK, not our problem: */ 1063 if (args->opcnt == 0) 1064 return nfs_ok; 1065 if (op->status == nfserr_op_illegal) 1066 return nfs_ok; 1067 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1068 return nfserr_op_not_in_session; 1069 if (op->opnum == OP_SEQUENCE) 1070 return nfs_ok; 1071 if (args->opcnt != 1) 1072 return nfserr_not_only_op; 1073 return nfs_ok; 1074 } 1075 1076 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1077 { 1078 return &nfsd4_ops[op->opnum]; 1079 } 1080 1081 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1082 { 1083 return OPDESC(op)->op_flags & OP_CACHEME; 1084 } 1085 1086 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1087 { 1088 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1089 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1090 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1091 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1092 struct nfsd4_operation *thisd; 1093 struct nfsd4_operation *nextd; 1094 1095 thisd = OPDESC(this); 1096 /* 1097 * Most ops check wronsec on our own; only the putfh-like ops 1098 * have special rules. 1099 */ 1100 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1101 return false; 1102 /* 1103 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1104 * put-filehandle operation if we're not going to use the 1105 * result: 1106 */ 1107 if (argp->opcnt == resp->opcnt) 1108 return false; 1109 1110 nextd = OPDESC(next); 1111 /* 1112 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1113 * errors themselves as necessary; others should check for them 1114 * now: 1115 */ 1116 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1117 } 1118 1119 /* 1120 * COMPOUND call. 1121 */ 1122 static __be32 1123 nfsd4_proc_compound(struct svc_rqst *rqstp, 1124 struct nfsd4_compoundargs *args, 1125 struct nfsd4_compoundres *resp) 1126 { 1127 struct nfsd4_op *op; 1128 struct nfsd4_operation *opdesc; 1129 struct nfsd4_compound_state *cstate = &resp->cstate; 1130 int slack_bytes; 1131 u32 plen = 0; 1132 __be32 status; 1133 1134 resp->xbuf = &rqstp->rq_res; 1135 resp->p = rqstp->rq_res.head[0].iov_base + 1136 rqstp->rq_res.head[0].iov_len; 1137 resp->tagp = resp->p; 1138 /* reserve space for: taglen, tag, and opcnt */ 1139 resp->p += 2 + XDR_QUADLEN(args->taglen); 1140 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1141 resp->taglen = args->taglen; 1142 resp->tag = args->tag; 1143 resp->opcnt = 0; 1144 resp->rqstp = rqstp; 1145 resp->cstate.minorversion = args->minorversion; 1146 resp->cstate.replay_owner = NULL; 1147 resp->cstate.session = NULL; 1148 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1149 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1150 /* 1151 * Don't use the deferral mechanism for NFSv4; compounds make it 1152 * too hard to avoid non-idempotency problems. 1153 */ 1154 rqstp->rq_usedeferral = 0; 1155 1156 /* 1157 * According to RFC3010, this takes precedence over all other errors. 1158 */ 1159 status = nfserr_minor_vers_mismatch; 1160 if (args->minorversion > nfsd_supported_minorversion) 1161 goto out; 1162 1163 status = nfs41_check_op_ordering(args); 1164 if (status) { 1165 op = &args->ops[0]; 1166 op->status = status; 1167 goto encode_op; 1168 } 1169 1170 while (!status && resp->opcnt < args->opcnt) { 1171 op = &args->ops[resp->opcnt++]; 1172 1173 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1174 resp->opcnt, args->opcnt, op->opnum, 1175 nfsd4_op_name(op->opnum)); 1176 /* 1177 * The XDR decode routines may have pre-set op->status; 1178 * for example, if there is a miscellaneous XDR error 1179 * it will be set to nfserr_bad_xdr. 1180 */ 1181 if (op->status) 1182 goto encode_op; 1183 1184 /* We must be able to encode a successful response to 1185 * this operation, with enough room left over to encode a 1186 * failed response to the next operation. If we don't 1187 * have enough room, fail with ERR_RESOURCE. 1188 */ 1189 slack_bytes = (char *)resp->end - (char *)resp->p; 1190 if (slack_bytes < COMPOUND_SLACK_SPACE 1191 + COMPOUND_ERR_SLACK_SPACE) { 1192 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1193 op->status = nfserr_resource; 1194 goto encode_op; 1195 } 1196 1197 opdesc = OPDESC(op); 1198 1199 if (!cstate->current_fh.fh_dentry) { 1200 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1201 op->status = nfserr_nofilehandle; 1202 goto encode_op; 1203 } 1204 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1205 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1206 op->status = nfserr_moved; 1207 goto encode_op; 1208 } 1209 1210 /* If op is non-idempotent */ 1211 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1212 plen = opdesc->op_rsize_bop(rqstp, op); 1213 op->status = nfsd4_check_resp_size(resp, plen); 1214 } 1215 1216 if (op->status) 1217 goto encode_op; 1218 1219 if (opdesc->op_func) 1220 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1221 else 1222 BUG_ON(op->status == nfs_ok); 1223 1224 if (!op->status && need_wrongsec_check(rqstp)) 1225 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1226 1227 encode_op: 1228 /* Only from SEQUENCE */ 1229 if (resp->cstate.status == nfserr_replay_cache) { 1230 dprintk("%s NFS4.1 replay from cache\n", __func__); 1231 status = op->status; 1232 goto out; 1233 } 1234 if (op->status == nfserr_replay_me) { 1235 op->replay = &cstate->replay_owner->so_replay; 1236 nfsd4_encode_replay(resp, op); 1237 status = op->status = op->replay->rp_status; 1238 } else { 1239 nfsd4_encode_operation(resp, op); 1240 status = op->status; 1241 } 1242 1243 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1244 args->ops, args->opcnt, resp->opcnt, op->opnum, 1245 be32_to_cpu(status)); 1246 1247 if (cstate->replay_owner) { 1248 nfs4_unlock_state(); 1249 cstate->replay_owner = NULL; 1250 } 1251 /* XXX Ugh, we need to get rid of this kind of special case: */ 1252 if (op->opnum == OP_READ && op->u.read.rd_filp) 1253 fput(op->u.read.rd_filp); 1254 1255 nfsd4_increment_op_stats(op->opnum); 1256 } 1257 1258 resp->cstate.status = status; 1259 fh_put(&resp->cstate.current_fh); 1260 fh_put(&resp->cstate.save_fh); 1261 BUG_ON(resp->cstate.replay_owner); 1262 out: 1263 /* Reset deferral mechanism for RPC deferrals */ 1264 rqstp->rq_usedeferral = 1; 1265 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1266 return status; 1267 } 1268 1269 #define op_encode_hdr_size (2) 1270 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1271 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1272 #define op_encode_change_info_maxsz (5) 1273 #define nfs4_fattr_bitmap_maxsz (4) 1274 1275 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1276 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1277 1278 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1279 1280 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1281 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1282 op_encode_ace_maxsz) 1283 1284 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1285 1286 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1287 { 1288 return (op_encode_hdr_size) * sizeof(__be32); 1289 } 1290 1291 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1292 { 1293 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1294 } 1295 1296 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1297 { 1298 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1299 } 1300 1301 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1302 { 1303 return (op_encode_hdr_size + op_encode_change_info_maxsz 1304 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1305 } 1306 1307 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1308 { 1309 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1310 * sizeof(__be32); 1311 } 1312 1313 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1314 { 1315 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1316 * sizeof(__be32); 1317 } 1318 1319 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1320 { 1321 return (op_encode_hdr_size + op_encode_stateid_maxsz 1322 + op_encode_change_info_maxsz + 1 1323 + nfs4_fattr_bitmap_maxsz 1324 + op_encode_delegation_maxsz) * sizeof(__be32); 1325 } 1326 1327 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1328 { 1329 u32 maxcount = 0, rlen = 0; 1330 1331 maxcount = svc_max_payload(rqstp); 1332 rlen = op->u.read.rd_length; 1333 1334 if (rlen > maxcount) 1335 rlen = maxcount; 1336 1337 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1338 } 1339 1340 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1341 { 1342 u32 rlen = op->u.readdir.rd_maxcount; 1343 1344 if (rlen > PAGE_SIZE) 1345 rlen = PAGE_SIZE; 1346 1347 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1348 * sizeof(__be32) + rlen; 1349 } 1350 1351 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1352 { 1353 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1354 * sizeof(__be32); 1355 } 1356 1357 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1358 { 1359 return (op_encode_hdr_size + op_encode_change_info_maxsz 1360 + op_encode_change_info_maxsz) * sizeof(__be32); 1361 } 1362 1363 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1364 { 1365 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1366 } 1367 1368 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1369 { 1370 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1371 } 1372 1373 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1374 { 1375 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1376 } 1377 1378 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1379 { 1380 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1381 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\ 1382 2 + /*eir_server_owner.so_minor_id */\ 1383 /* eir_server_owner.so_major_id<> */\ 1384 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1385 /* eir_server_scope<> */\ 1386 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1387 1 + /* eir_server_impl_id array length */\ 1388 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1389 } 1390 1391 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1392 { 1393 return (op_encode_hdr_size + \ 1394 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1395 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1396 } 1397 1398 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1399 { 1400 return (op_encode_hdr_size + \ 1401 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1402 2 + /* csr_sequence, csr_flags */\ 1403 op_encode_channel_attrs_maxsz + \ 1404 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1405 } 1406 1407 static struct nfsd4_operation nfsd4_ops[] = { 1408 [OP_ACCESS] = { 1409 .op_func = (nfsd4op_func)nfsd4_access, 1410 .op_name = "OP_ACCESS", 1411 }, 1412 [OP_CLOSE] = { 1413 .op_func = (nfsd4op_func)nfsd4_close, 1414 .op_flags = OP_MODIFIES_SOMETHING, 1415 .op_name = "OP_CLOSE", 1416 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1417 }, 1418 [OP_COMMIT] = { 1419 .op_func = (nfsd4op_func)nfsd4_commit, 1420 .op_flags = OP_MODIFIES_SOMETHING, 1421 .op_name = "OP_COMMIT", 1422 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1423 }, 1424 [OP_CREATE] = { 1425 .op_func = (nfsd4op_func)nfsd4_create, 1426 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1427 .op_name = "OP_CREATE", 1428 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1429 }, 1430 [OP_DELEGRETURN] = { 1431 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1432 .op_flags = OP_MODIFIES_SOMETHING, 1433 .op_name = "OP_DELEGRETURN", 1434 .op_rsize_bop = nfsd4_only_status_rsize, 1435 }, 1436 [OP_GETATTR] = { 1437 .op_func = (nfsd4op_func)nfsd4_getattr, 1438 .op_flags = ALLOWED_ON_ABSENT_FS, 1439 .op_name = "OP_GETATTR", 1440 }, 1441 [OP_GETFH] = { 1442 .op_func = (nfsd4op_func)nfsd4_getfh, 1443 .op_name = "OP_GETFH", 1444 }, 1445 [OP_LINK] = { 1446 .op_func = (nfsd4op_func)nfsd4_link, 1447 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1448 | OP_CACHEME, 1449 .op_name = "OP_LINK", 1450 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1451 }, 1452 [OP_LOCK] = { 1453 .op_func = (nfsd4op_func)nfsd4_lock, 1454 .op_flags = OP_MODIFIES_SOMETHING, 1455 .op_name = "OP_LOCK", 1456 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1457 }, 1458 [OP_LOCKT] = { 1459 .op_func = (nfsd4op_func)nfsd4_lockt, 1460 .op_name = "OP_LOCKT", 1461 }, 1462 [OP_LOCKU] = { 1463 .op_func = (nfsd4op_func)nfsd4_locku, 1464 .op_flags = OP_MODIFIES_SOMETHING, 1465 .op_name = "OP_LOCKU", 1466 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1467 }, 1468 [OP_LOOKUP] = { 1469 .op_func = (nfsd4op_func)nfsd4_lookup, 1470 .op_flags = OP_HANDLES_WRONGSEC, 1471 .op_name = "OP_LOOKUP", 1472 }, 1473 [OP_LOOKUPP] = { 1474 .op_func = (nfsd4op_func)nfsd4_lookupp, 1475 .op_flags = OP_HANDLES_WRONGSEC, 1476 .op_name = "OP_LOOKUPP", 1477 }, 1478 [OP_NVERIFY] = { 1479 .op_func = (nfsd4op_func)nfsd4_nverify, 1480 .op_name = "OP_NVERIFY", 1481 }, 1482 [OP_OPEN] = { 1483 .op_func = (nfsd4op_func)nfsd4_open, 1484 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1485 .op_name = "OP_OPEN", 1486 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1487 }, 1488 [OP_OPEN_CONFIRM] = { 1489 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1490 .op_flags = OP_MODIFIES_SOMETHING, 1491 .op_name = "OP_OPEN_CONFIRM", 1492 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1493 }, 1494 [OP_OPEN_DOWNGRADE] = { 1495 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1496 .op_flags = OP_MODIFIES_SOMETHING, 1497 .op_name = "OP_OPEN_DOWNGRADE", 1498 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1499 }, 1500 [OP_PUTFH] = { 1501 .op_func = (nfsd4op_func)nfsd4_putfh, 1502 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1503 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1504 .op_name = "OP_PUTFH", 1505 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1506 }, 1507 [OP_PUTPUBFH] = { 1508 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1509 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1510 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1511 .op_name = "OP_PUTPUBFH", 1512 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1513 }, 1514 [OP_PUTROOTFH] = { 1515 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1516 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1517 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1518 .op_name = "OP_PUTROOTFH", 1519 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1520 }, 1521 [OP_READ] = { 1522 .op_func = (nfsd4op_func)nfsd4_read, 1523 .op_flags = OP_MODIFIES_SOMETHING, 1524 .op_name = "OP_READ", 1525 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1526 }, 1527 [OP_READDIR] = { 1528 .op_func = (nfsd4op_func)nfsd4_readdir, 1529 .op_flags = OP_MODIFIES_SOMETHING, 1530 .op_name = "OP_READDIR", 1531 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1532 }, 1533 [OP_READLINK] = { 1534 .op_func = (nfsd4op_func)nfsd4_readlink, 1535 .op_name = "OP_READLINK", 1536 }, 1537 [OP_REMOVE] = { 1538 .op_func = (nfsd4op_func)nfsd4_remove, 1539 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1540 .op_name = "OP_REMOVE", 1541 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1542 }, 1543 [OP_RENAME] = { 1544 .op_func = (nfsd4op_func)nfsd4_rename, 1545 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1546 .op_name = "OP_RENAME", 1547 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1548 }, 1549 [OP_RENEW] = { 1550 .op_func = (nfsd4op_func)nfsd4_renew, 1551 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1552 | OP_MODIFIES_SOMETHING, 1553 .op_name = "OP_RENEW", 1554 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1555 1556 }, 1557 [OP_RESTOREFH] = { 1558 .op_func = (nfsd4op_func)nfsd4_restorefh, 1559 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1560 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1561 .op_name = "OP_RESTOREFH", 1562 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1563 }, 1564 [OP_SAVEFH] = { 1565 .op_func = (nfsd4op_func)nfsd4_savefh, 1566 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1567 .op_name = "OP_SAVEFH", 1568 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1569 }, 1570 [OP_SECINFO] = { 1571 .op_func = (nfsd4op_func)nfsd4_secinfo, 1572 .op_flags = OP_HANDLES_WRONGSEC, 1573 .op_name = "OP_SECINFO", 1574 }, 1575 [OP_SETATTR] = { 1576 .op_func = (nfsd4op_func)nfsd4_setattr, 1577 .op_name = "OP_SETATTR", 1578 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1579 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1580 }, 1581 [OP_SETCLIENTID] = { 1582 .op_func = (nfsd4op_func)nfsd4_setclientid, 1583 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1584 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1585 .op_name = "OP_SETCLIENTID", 1586 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1587 }, 1588 [OP_SETCLIENTID_CONFIRM] = { 1589 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1590 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1591 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1592 .op_name = "OP_SETCLIENTID_CONFIRM", 1593 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1594 }, 1595 [OP_VERIFY] = { 1596 .op_func = (nfsd4op_func)nfsd4_verify, 1597 .op_name = "OP_VERIFY", 1598 }, 1599 [OP_WRITE] = { 1600 .op_func = (nfsd4op_func)nfsd4_write, 1601 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1602 .op_name = "OP_WRITE", 1603 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1604 }, 1605 [OP_RELEASE_LOCKOWNER] = { 1606 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1607 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1608 | OP_MODIFIES_SOMETHING, 1609 .op_name = "OP_RELEASE_LOCKOWNER", 1610 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1611 }, 1612 1613 /* NFSv4.1 operations */ 1614 [OP_EXCHANGE_ID] = { 1615 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1616 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1617 | OP_MODIFIES_SOMETHING, 1618 .op_name = "OP_EXCHANGE_ID", 1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1620 }, 1621 [OP_BIND_CONN_TO_SESSION] = { 1622 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1623 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1624 | OP_MODIFIES_SOMETHING, 1625 .op_name = "OP_BIND_CONN_TO_SESSION", 1626 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1627 }, 1628 [OP_CREATE_SESSION] = { 1629 .op_func = (nfsd4op_func)nfsd4_create_session, 1630 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1631 | OP_MODIFIES_SOMETHING, 1632 .op_name = "OP_CREATE_SESSION", 1633 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1634 }, 1635 [OP_DESTROY_SESSION] = { 1636 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1637 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1638 | OP_MODIFIES_SOMETHING, 1639 .op_name = "OP_DESTROY_SESSION", 1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1641 }, 1642 [OP_SEQUENCE] = { 1643 .op_func = (nfsd4op_func)nfsd4_sequence, 1644 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1645 .op_name = "OP_SEQUENCE", 1646 }, 1647 [OP_DESTROY_CLIENTID] = { 1648 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1649 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1650 | OP_MODIFIES_SOMETHING, 1651 .op_name = "OP_DESTROY_CLIENTID", 1652 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1653 }, 1654 [OP_RECLAIM_COMPLETE] = { 1655 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1656 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1657 .op_name = "OP_RECLAIM_COMPLETE", 1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1659 }, 1660 [OP_SECINFO_NO_NAME] = { 1661 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1662 .op_flags = OP_HANDLES_WRONGSEC, 1663 .op_name = "OP_SECINFO_NO_NAME", 1664 }, 1665 [OP_TEST_STATEID] = { 1666 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1667 .op_flags = ALLOWED_WITHOUT_FH, 1668 .op_name = "OP_TEST_STATEID", 1669 }, 1670 [OP_FREE_STATEID] = { 1671 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1672 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1673 .op_name = "OP_FREE_STATEID", 1674 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1675 }, 1676 }; 1677 1678 static const char *nfsd4_op_name(unsigned opnum) 1679 { 1680 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1681 return nfsd4_ops[opnum].op_name; 1682 return "unknown_operation"; 1683 } 1684 1685 #define nfsd4_voidres nfsd4_voidargs 1686 struct nfsd4_voidargs { int dummy; }; 1687 1688 static struct svc_procedure nfsd_procedures4[2] = { 1689 [NFSPROC4_NULL] = { 1690 .pc_func = (svc_procfunc) nfsd4_proc_null, 1691 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1692 .pc_argsize = sizeof(struct nfsd4_voidargs), 1693 .pc_ressize = sizeof(struct nfsd4_voidres), 1694 .pc_cachetype = RC_NOCACHE, 1695 .pc_xdrressize = 1, 1696 }, 1697 [NFSPROC4_COMPOUND] = { 1698 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1699 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1700 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1701 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1702 .pc_ressize = sizeof(struct nfsd4_compoundres), 1703 .pc_release = nfsd4_release_compoundargs, 1704 .pc_cachetype = RC_NOCACHE, 1705 .pc_xdrressize = NFSD_BUFSIZE/4, 1706 }, 1707 }; 1708 1709 struct svc_version nfsd_version4 = { 1710 .vs_vers = 4, 1711 .vs_nproc = 2, 1712 .vs_proc = nfsd_procedures4, 1713 .vs_dispatch = nfsd_dispatch, 1714 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1715 }; 1716 1717 /* 1718 * Local variables: 1719 * c-basic-offset: 8 1720 * End: 1721 */ 1722