1 /* 2 * fs/nfs/nfs4xdr.c 3 * 4 * Server-side XDR 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 * TODO: Neil Brown made the following observation: We currently 38 * initially reserve NFSD_BUFSIZE space on the transmit queue and 39 * never release any of that until the request is complete. 40 * It would be good to calculate a new maximum response size while 41 * decoding the COMPOUND, and call svc_reserve with this number 42 * at the end of nfs4svc_decode_compoundargs. 43 */ 44 45 #include <linux/param.h> 46 #include <linux/smp.h> 47 #include <linux/fs.h> 48 #include <linux/namei.h> 49 #include <linux/vfs.h> 50 #include <linux/sunrpc/xdr.h> 51 #include <linux/sunrpc/svc.h> 52 #include <linux/sunrpc/clnt.h> 53 #include <linux/nfsd/nfsd.h> 54 #include <linux/nfsd/state.h> 55 #include <linux/nfsd/xdr4.h> 56 #include <linux/nfsd_idmap.h> 57 #include <linux/nfs4.h> 58 #include <linux/nfs4_acl.h> 59 #include <linux/sunrpc/gss_api.h> 60 #include <linux/sunrpc/svcauth_gss.h> 61 62 #define NFSDDBG_FACILITY NFSDDBG_XDR 63 64 /* 65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 66 * directory in order to indicate to the client that a filesystem boundary is present 67 * We use a fixed fsid for a referral 68 */ 69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 71 72 static __be32 73 check_filename(char *str, int len, __be32 err) 74 { 75 int i; 76 77 if (len == 0) 78 return nfserr_inval; 79 if (isdotent(str, len)) 80 return err; 81 for (i = 0; i < len; i++) 82 if (str[i] == '/') 83 return err; 84 return 0; 85 } 86 87 /* 88 * START OF "GENERIC" DECODE ROUTINES. 89 * These may look a little ugly since they are imported from a "generic" 90 * set of XDR encode/decode routines which are intended to be shared by 91 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 92 * 93 * If the pain of reading these is too great, it should be a straightforward 94 * task to translate them into Linux-specific versions which are more 95 * consistent with the style used in NFSv2/v3... 96 */ 97 #define DECODE_HEAD \ 98 __be32 *p; \ 99 __be32 status 100 #define DECODE_TAIL \ 101 status = 0; \ 102 out: \ 103 return status; \ 104 xdr_error: \ 105 dprintk("NFSD: xdr error (%s:%d)\n", \ 106 __FILE__, __LINE__); \ 107 status = nfserr_bad_xdr; \ 108 goto out 109 110 #define READ32(x) (x) = ntohl(*p++) 111 #define READ64(x) do { \ 112 (x) = (u64)ntohl(*p++) << 32; \ 113 (x) |= ntohl(*p++); \ 114 } while (0) 115 #define READTIME(x) do { \ 116 p++; \ 117 (x) = ntohl(*p++); \ 118 p++; \ 119 } while (0) 120 #define READMEM(x,nbytes) do { \ 121 x = (char *)p; \ 122 p += XDR_QUADLEN(nbytes); \ 123 } while (0) 124 #define SAVEMEM(x,nbytes) do { \ 125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 126 savemem(argp, p, nbytes) : \ 127 (char *)p)) { \ 128 dprintk("NFSD: xdr error (%s:%d)\n", \ 129 __FILE__, __LINE__); \ 130 goto xdr_error; \ 131 } \ 132 p += XDR_QUADLEN(nbytes); \ 133 } while (0) 134 #define COPYMEM(x,nbytes) do { \ 135 memcpy((x), p, nbytes); \ 136 p += XDR_QUADLEN(nbytes); \ 137 } while (0) 138 139 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 140 #define READ_BUF(nbytes) do { \ 141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 142 p = argp->p; \ 143 argp->p += XDR_QUADLEN(nbytes); \ 144 } else if (!(p = read_buf(argp, nbytes))) { \ 145 dprintk("NFSD: xdr error (%s:%d)\n", \ 146 __FILE__, __LINE__); \ 147 goto xdr_error; \ 148 } \ 149 } while (0) 150 151 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) 152 { 153 /* We want more bytes than seem to be available. 154 * Maybe we need a new page, maybe we have just run out 155 */ 156 int avail = (char*)argp->end - (char*)argp->p; 157 __be32 *p; 158 if (avail + argp->pagelen < nbytes) 159 return NULL; 160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 161 return NULL; 162 /* ok, we can do it with the current plus the next page */ 163 if (nbytes <= sizeof(argp->tmp)) 164 p = argp->tmp; 165 else { 166 kfree(argp->tmpp); 167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 168 if (!p) 169 return NULL; 170 171 } 172 memcpy(p, argp->p, avail); 173 /* step to next page */ 174 argp->p = page_address(argp->pagelist[0]); 175 argp->pagelist++; 176 if (argp->pagelen < PAGE_SIZE) { 177 argp->end = p + (argp->pagelen>>2); 178 argp->pagelen = 0; 179 } else { 180 argp->end = p + (PAGE_SIZE>>2); 181 argp->pagelen -= PAGE_SIZE; 182 } 183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 184 argp->p += XDR_QUADLEN(nbytes - avail); 185 return p; 186 } 187 188 static int 189 defer_free(struct nfsd4_compoundargs *argp, 190 void (*release)(const void *), void *p) 191 { 192 struct tmpbuf *tb; 193 194 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 195 if (!tb) 196 return -ENOMEM; 197 tb->buf = p; 198 tb->release = release; 199 tb->next = argp->to_free; 200 argp->to_free = tb; 201 return 0; 202 } 203 204 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 205 { 206 if (p == argp->tmp) { 207 p = kmalloc(nbytes, GFP_KERNEL); 208 if (!p) 209 return NULL; 210 memcpy(p, argp->tmp, nbytes); 211 } else { 212 BUG_ON(p != argp->tmpp); 213 argp->tmpp = NULL; 214 } 215 if (defer_free(argp, kfree, p)) { 216 kfree(p); 217 return NULL; 218 } else 219 return (char *)p; 220 } 221 222 static __be32 223 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 224 { 225 u32 bmlen; 226 DECODE_HEAD; 227 228 bmval[0] = 0; 229 bmval[1] = 0; 230 231 READ_BUF(4); 232 READ32(bmlen); 233 if (bmlen > 1000) 234 goto xdr_error; 235 236 READ_BUF(bmlen << 2); 237 if (bmlen > 0) 238 READ32(bmval[0]); 239 if (bmlen > 1) 240 READ32(bmval[1]); 241 242 DECODE_TAIL; 243 } 244 245 static __be32 246 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 247 struct nfs4_acl **acl) 248 { 249 int expected_len, len = 0; 250 u32 dummy32; 251 char *buf; 252 int host_err; 253 254 DECODE_HEAD; 255 iattr->ia_valid = 0; 256 if ((status = nfsd4_decode_bitmap(argp, bmval))) 257 return status; 258 259 /* 260 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP; 261 * read-only attributes return ERR_INVAL. 262 */ 263 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 264 return nfserr_attrnotsupp; 265 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 266 return nfserr_inval; 267 268 READ_BUF(4); 269 READ32(expected_len); 270 271 if (bmval[0] & FATTR4_WORD0_SIZE) { 272 READ_BUF(8); 273 len += 8; 274 READ64(iattr->ia_size); 275 iattr->ia_valid |= ATTR_SIZE; 276 } 277 if (bmval[0] & FATTR4_WORD0_ACL) { 278 int nace; 279 struct nfs4_ace *ace; 280 281 READ_BUF(4); len += 4; 282 READ32(nace); 283 284 if (nace > NFS4_ACL_MAX) 285 return nfserr_resource; 286 287 *acl = nfs4_acl_new(nace); 288 if (*acl == NULL) { 289 host_err = -ENOMEM; 290 goto out_nfserr; 291 } 292 defer_free(argp, kfree, *acl); 293 294 (*acl)->naces = nace; 295 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 296 READ_BUF(16); len += 16; 297 READ32(ace->type); 298 READ32(ace->flag); 299 READ32(ace->access_mask); 300 READ32(dummy32); 301 READ_BUF(dummy32); 302 len += XDR_QUADLEN(dummy32) << 2; 303 READMEM(buf, dummy32); 304 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 305 host_err = 0; 306 if (ace->whotype != NFS4_ACL_WHO_NAMED) 307 ace->who = 0; 308 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 309 host_err = nfsd_map_name_to_gid(argp->rqstp, 310 buf, dummy32, &ace->who); 311 else 312 host_err = nfsd_map_name_to_uid(argp->rqstp, 313 buf, dummy32, &ace->who); 314 if (host_err) 315 goto out_nfserr; 316 } 317 } else 318 *acl = NULL; 319 if (bmval[1] & FATTR4_WORD1_MODE) { 320 READ_BUF(4); 321 len += 4; 322 READ32(iattr->ia_mode); 323 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 324 iattr->ia_valid |= ATTR_MODE; 325 } 326 if (bmval[1] & FATTR4_WORD1_OWNER) { 327 READ_BUF(4); 328 len += 4; 329 READ32(dummy32); 330 READ_BUF(dummy32); 331 len += (XDR_QUADLEN(dummy32) << 2); 332 READMEM(buf, dummy32); 333 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 334 goto out_nfserr; 335 iattr->ia_valid |= ATTR_UID; 336 } 337 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 338 READ_BUF(4); 339 len += 4; 340 READ32(dummy32); 341 READ_BUF(dummy32); 342 len += (XDR_QUADLEN(dummy32) << 2); 343 READMEM(buf, dummy32); 344 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 345 goto out_nfserr; 346 iattr->ia_valid |= ATTR_GID; 347 } 348 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 349 READ_BUF(4); 350 len += 4; 351 READ32(dummy32); 352 switch (dummy32) { 353 case NFS4_SET_TO_CLIENT_TIME: 354 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 355 all 32 bits of 'nseconds'. */ 356 READ_BUF(12); 357 len += 12; 358 READ32(dummy32); 359 if (dummy32) 360 return nfserr_inval; 361 READ32(iattr->ia_atime.tv_sec); 362 READ32(iattr->ia_atime.tv_nsec); 363 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 364 return nfserr_inval; 365 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 366 break; 367 case NFS4_SET_TO_SERVER_TIME: 368 iattr->ia_valid |= ATTR_ATIME; 369 break; 370 default: 371 goto xdr_error; 372 } 373 } 374 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { 375 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 376 all 32 bits of 'nseconds'. */ 377 READ_BUF(12); 378 len += 12; 379 READ32(dummy32); 380 if (dummy32) 381 return nfserr_inval; 382 READ32(iattr->ia_ctime.tv_sec); 383 READ32(iattr->ia_ctime.tv_nsec); 384 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) 385 return nfserr_inval; 386 iattr->ia_valid |= ATTR_CTIME; 387 } 388 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 389 READ_BUF(4); 390 len += 4; 391 READ32(dummy32); 392 switch (dummy32) { 393 case NFS4_SET_TO_CLIENT_TIME: 394 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 395 all 32 bits of 'nseconds'. */ 396 READ_BUF(12); 397 len += 12; 398 READ32(dummy32); 399 if (dummy32) 400 return nfserr_inval; 401 READ32(iattr->ia_mtime.tv_sec); 402 READ32(iattr->ia_mtime.tv_nsec); 403 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 404 return nfserr_inval; 405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 406 break; 407 case NFS4_SET_TO_SERVER_TIME: 408 iattr->ia_valid |= ATTR_MTIME; 409 break; 410 default: 411 goto xdr_error; 412 } 413 } 414 if (len != expected_len) 415 goto xdr_error; 416 417 DECODE_TAIL; 418 419 out_nfserr: 420 status = nfserrno(host_err); 421 goto out; 422 } 423 424 static __be32 425 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 426 { 427 DECODE_HEAD; 428 429 READ_BUF(4); 430 READ32(access->ac_req_access); 431 432 DECODE_TAIL; 433 } 434 435 static __be32 436 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 437 { 438 DECODE_HEAD; 439 440 close->cl_stateowner = NULL; 441 READ_BUF(4 + sizeof(stateid_t)); 442 READ32(close->cl_seqid); 443 READ32(close->cl_stateid.si_generation); 444 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 445 446 DECODE_TAIL; 447 } 448 449 450 static __be32 451 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 452 { 453 DECODE_HEAD; 454 455 READ_BUF(12); 456 READ64(commit->co_offset); 457 READ32(commit->co_count); 458 459 DECODE_TAIL; 460 } 461 462 static __be32 463 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 464 { 465 DECODE_HEAD; 466 467 READ_BUF(4); 468 READ32(create->cr_type); 469 switch (create->cr_type) { 470 case NF4LNK: 471 READ_BUF(4); 472 READ32(create->cr_linklen); 473 READ_BUF(create->cr_linklen); 474 SAVEMEM(create->cr_linkname, create->cr_linklen); 475 break; 476 case NF4BLK: 477 case NF4CHR: 478 READ_BUF(8); 479 READ32(create->cr_specdata1); 480 READ32(create->cr_specdata2); 481 break; 482 case NF4SOCK: 483 case NF4FIFO: 484 case NF4DIR: 485 default: 486 break; 487 } 488 489 READ_BUF(4); 490 READ32(create->cr_namelen); 491 READ_BUF(create->cr_namelen); 492 SAVEMEM(create->cr_name, create->cr_namelen); 493 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 494 return status; 495 496 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 497 goto out; 498 499 DECODE_TAIL; 500 } 501 502 static inline __be32 503 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 504 { 505 DECODE_HEAD; 506 507 READ_BUF(sizeof(stateid_t)); 508 READ32(dr->dr_stateid.si_generation); 509 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 510 511 DECODE_TAIL; 512 } 513 514 static inline __be32 515 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 516 { 517 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 518 } 519 520 static __be32 521 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 522 { 523 DECODE_HEAD; 524 525 READ_BUF(4); 526 READ32(link->li_namelen); 527 READ_BUF(link->li_namelen); 528 SAVEMEM(link->li_name, link->li_namelen); 529 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 530 return status; 531 532 DECODE_TAIL; 533 } 534 535 static __be32 536 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 537 { 538 DECODE_HEAD; 539 540 lock->lk_replay_owner = NULL; 541 /* 542 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 543 */ 544 READ_BUF(28); 545 READ32(lock->lk_type); 546 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 547 goto xdr_error; 548 READ32(lock->lk_reclaim); 549 READ64(lock->lk_offset); 550 READ64(lock->lk_length); 551 READ32(lock->lk_is_new); 552 553 if (lock->lk_is_new) { 554 READ_BUF(36); 555 READ32(lock->lk_new_open_seqid); 556 READ32(lock->lk_new_open_stateid.si_generation); 557 558 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 559 READ32(lock->lk_new_lock_seqid); 560 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 561 READ32(lock->lk_new_owner.len); 562 READ_BUF(lock->lk_new_owner.len); 563 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 564 } else { 565 READ_BUF(20); 566 READ32(lock->lk_old_lock_stateid.si_generation); 567 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 568 READ32(lock->lk_old_lock_seqid); 569 } 570 571 DECODE_TAIL; 572 } 573 574 static __be32 575 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 576 { 577 DECODE_HEAD; 578 579 READ_BUF(32); 580 READ32(lockt->lt_type); 581 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 582 goto xdr_error; 583 READ64(lockt->lt_offset); 584 READ64(lockt->lt_length); 585 COPYMEM(&lockt->lt_clientid, 8); 586 READ32(lockt->lt_owner.len); 587 READ_BUF(lockt->lt_owner.len); 588 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 589 590 DECODE_TAIL; 591 } 592 593 static __be32 594 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 595 { 596 DECODE_HEAD; 597 598 locku->lu_stateowner = NULL; 599 READ_BUF(24 + sizeof(stateid_t)); 600 READ32(locku->lu_type); 601 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 602 goto xdr_error; 603 READ32(locku->lu_seqid); 604 READ32(locku->lu_stateid.si_generation); 605 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 606 READ64(locku->lu_offset); 607 READ64(locku->lu_length); 608 609 DECODE_TAIL; 610 } 611 612 static __be32 613 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 614 { 615 DECODE_HEAD; 616 617 READ_BUF(4); 618 READ32(lookup->lo_len); 619 READ_BUF(lookup->lo_len); 620 SAVEMEM(lookup->lo_name, lookup->lo_len); 621 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 622 return status; 623 624 DECODE_TAIL; 625 } 626 627 static __be32 628 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 629 { 630 DECODE_HEAD; 631 632 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 633 open->op_iattr.ia_valid = 0; 634 open->op_stateowner = NULL; 635 636 /* seqid, share_access, share_deny, clientid, ownerlen */ 637 READ_BUF(16 + sizeof(clientid_t)); 638 READ32(open->op_seqid); 639 READ32(open->op_share_access); 640 READ32(open->op_share_deny); 641 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 642 READ32(open->op_owner.len); 643 644 /* owner, open_flag */ 645 READ_BUF(open->op_owner.len + 4); 646 SAVEMEM(open->op_owner.data, open->op_owner.len); 647 READ32(open->op_create); 648 switch (open->op_create) { 649 case NFS4_OPEN_NOCREATE: 650 break; 651 case NFS4_OPEN_CREATE: 652 READ_BUF(4); 653 READ32(open->op_createmode); 654 switch (open->op_createmode) { 655 case NFS4_CREATE_UNCHECKED: 656 case NFS4_CREATE_GUARDED: 657 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 658 goto out; 659 break; 660 case NFS4_CREATE_EXCLUSIVE: 661 READ_BUF(8); 662 COPYMEM(open->op_verf.data, 8); 663 break; 664 default: 665 goto xdr_error; 666 } 667 break; 668 default: 669 goto xdr_error; 670 } 671 672 /* open_claim */ 673 READ_BUF(4); 674 READ32(open->op_claim_type); 675 switch (open->op_claim_type) { 676 case NFS4_OPEN_CLAIM_NULL: 677 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 678 READ_BUF(4); 679 READ32(open->op_fname.len); 680 READ_BUF(open->op_fname.len); 681 SAVEMEM(open->op_fname.data, open->op_fname.len); 682 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 683 return status; 684 break; 685 case NFS4_OPEN_CLAIM_PREVIOUS: 686 READ_BUF(4); 687 READ32(open->op_delegate_type); 688 break; 689 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 690 READ_BUF(sizeof(stateid_t) + 4); 691 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 692 READ32(open->op_fname.len); 693 READ_BUF(open->op_fname.len); 694 SAVEMEM(open->op_fname.data, open->op_fname.len); 695 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 696 return status; 697 break; 698 default: 699 goto xdr_error; 700 } 701 702 DECODE_TAIL; 703 } 704 705 static __be32 706 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 707 { 708 DECODE_HEAD; 709 710 open_conf->oc_stateowner = NULL; 711 READ_BUF(4 + sizeof(stateid_t)); 712 READ32(open_conf->oc_req_stateid.si_generation); 713 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 714 READ32(open_conf->oc_seqid); 715 716 DECODE_TAIL; 717 } 718 719 static __be32 720 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 721 { 722 DECODE_HEAD; 723 724 open_down->od_stateowner = NULL; 725 READ_BUF(12 + sizeof(stateid_t)); 726 READ32(open_down->od_stateid.si_generation); 727 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 728 READ32(open_down->od_seqid); 729 READ32(open_down->od_share_access); 730 READ32(open_down->od_share_deny); 731 732 DECODE_TAIL; 733 } 734 735 static __be32 736 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 737 { 738 DECODE_HEAD; 739 740 READ_BUF(4); 741 READ32(putfh->pf_fhlen); 742 if (putfh->pf_fhlen > NFS4_FHSIZE) 743 goto xdr_error; 744 READ_BUF(putfh->pf_fhlen); 745 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 746 747 DECODE_TAIL; 748 } 749 750 static __be32 751 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 752 { 753 DECODE_HEAD; 754 755 READ_BUF(sizeof(stateid_t) + 12); 756 READ32(read->rd_stateid.si_generation); 757 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 758 READ64(read->rd_offset); 759 READ32(read->rd_length); 760 761 DECODE_TAIL; 762 } 763 764 static __be32 765 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 766 { 767 DECODE_HEAD; 768 769 READ_BUF(24); 770 READ64(readdir->rd_cookie); 771 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 772 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 773 READ32(readdir->rd_maxcount); 774 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 775 goto out; 776 777 DECODE_TAIL; 778 } 779 780 static __be32 781 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 782 { 783 DECODE_HEAD; 784 785 READ_BUF(4); 786 READ32(remove->rm_namelen); 787 READ_BUF(remove->rm_namelen); 788 SAVEMEM(remove->rm_name, remove->rm_namelen); 789 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 790 return status; 791 792 DECODE_TAIL; 793 } 794 795 static __be32 796 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 797 { 798 DECODE_HEAD; 799 800 READ_BUF(4); 801 READ32(rename->rn_snamelen); 802 READ_BUF(rename->rn_snamelen + 4); 803 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 804 READ32(rename->rn_tnamelen); 805 READ_BUF(rename->rn_tnamelen); 806 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 807 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 808 return status; 809 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 810 return status; 811 812 DECODE_TAIL; 813 } 814 815 static __be32 816 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 817 { 818 DECODE_HEAD; 819 820 READ_BUF(sizeof(clientid_t)); 821 COPYMEM(clientid, sizeof(clientid_t)); 822 823 DECODE_TAIL; 824 } 825 826 static __be32 827 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 828 struct nfsd4_secinfo *secinfo) 829 { 830 DECODE_HEAD; 831 832 READ_BUF(4); 833 READ32(secinfo->si_namelen); 834 READ_BUF(secinfo->si_namelen); 835 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 836 status = check_filename(secinfo->si_name, secinfo->si_namelen, 837 nfserr_noent); 838 if (status) 839 return status; 840 DECODE_TAIL; 841 } 842 843 static __be32 844 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 845 { 846 DECODE_HEAD; 847 848 READ_BUF(sizeof(stateid_t)); 849 READ32(setattr->sa_stateid.si_generation); 850 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 851 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 852 goto out; 853 854 DECODE_TAIL; 855 } 856 857 static __be32 858 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 859 { 860 DECODE_HEAD; 861 862 READ_BUF(12); 863 COPYMEM(setclientid->se_verf.data, 8); 864 READ32(setclientid->se_namelen); 865 866 READ_BUF(setclientid->se_namelen + 8); 867 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 868 READ32(setclientid->se_callback_prog); 869 READ32(setclientid->se_callback_netid_len); 870 871 READ_BUF(setclientid->se_callback_netid_len + 4); 872 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 873 READ32(setclientid->se_callback_addr_len); 874 875 READ_BUF(setclientid->se_callback_addr_len + 4); 876 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 877 READ32(setclientid->se_callback_ident); 878 879 DECODE_TAIL; 880 } 881 882 static __be32 883 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 884 { 885 DECODE_HEAD; 886 887 READ_BUF(8 + sizeof(nfs4_verifier)); 888 COPYMEM(&scd_c->sc_clientid, 8); 889 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 890 891 DECODE_TAIL; 892 } 893 894 /* Also used for NVERIFY */ 895 static __be32 896 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 897 { 898 #if 0 899 struct nfsd4_compoundargs save = { 900 .p = argp->p, 901 .end = argp->end, 902 .rqstp = argp->rqstp, 903 }; 904 u32 ve_bmval[2]; 905 struct iattr ve_iattr; /* request */ 906 struct nfs4_acl *ve_acl; /* request */ 907 #endif 908 DECODE_HEAD; 909 910 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 911 goto out; 912 913 /* For convenience's sake, we compare raw xdr'd attributes in 914 * nfsd4_proc_verify; however we still decode here just to return 915 * correct error in case of bad xdr. */ 916 #if 0 917 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 918 if (status == nfserr_inval) { 919 status = nfserrno(status); 920 goto out; 921 } 922 #endif 923 READ_BUF(4); 924 READ32(verify->ve_attrlen); 925 READ_BUF(verify->ve_attrlen); 926 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 927 928 DECODE_TAIL; 929 } 930 931 static __be32 932 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 933 { 934 int avail; 935 int v; 936 int len; 937 DECODE_HEAD; 938 939 READ_BUF(sizeof(stateid_opaque_t) + 20); 940 READ32(write->wr_stateid.si_generation); 941 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 942 READ64(write->wr_offset); 943 READ32(write->wr_stable_how); 944 if (write->wr_stable_how > 2) 945 goto xdr_error; 946 READ32(write->wr_buflen); 947 948 /* Sorry .. no magic macros for this.. * 949 * READ_BUF(write->wr_buflen); 950 * SAVEMEM(write->wr_buf, write->wr_buflen); 951 */ 952 avail = (char*)argp->end - (char*)argp->p; 953 if (avail + argp->pagelen < write->wr_buflen) { 954 dprintk("NFSD: xdr error (%s:%d)\n", 955 __FILE__, __LINE__); 956 goto xdr_error; 957 } 958 argp->rqstp->rq_vec[0].iov_base = p; 959 argp->rqstp->rq_vec[0].iov_len = avail; 960 v = 0; 961 len = write->wr_buflen; 962 while (len > argp->rqstp->rq_vec[v].iov_len) { 963 len -= argp->rqstp->rq_vec[v].iov_len; 964 v++; 965 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 966 argp->pagelist++; 967 if (argp->pagelen >= PAGE_SIZE) { 968 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 969 argp->pagelen -= PAGE_SIZE; 970 } else { 971 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 972 argp->pagelen -= len; 973 } 974 } 975 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 976 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 977 argp->rqstp->rq_vec[v].iov_len = len; 978 write->wr_vlen = v+1; 979 980 DECODE_TAIL; 981 } 982 983 static __be32 984 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 985 { 986 DECODE_HEAD; 987 988 READ_BUF(12); 989 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 990 READ32(rlockowner->rl_owner.len); 991 READ_BUF(rlockowner->rl_owner.len); 992 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 993 994 DECODE_TAIL; 995 } 996 997 static __be32 998 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 999 { 1000 DECODE_HEAD; 1001 struct nfsd4_op *op; 1002 int i; 1003 1004 /* 1005 * XXX: According to spec, we should check the tag 1006 * for UTF-8 compliance. I'm postponing this for 1007 * now because it seems that some clients do use 1008 * binary tags. 1009 */ 1010 READ_BUF(4); 1011 READ32(argp->taglen); 1012 READ_BUF(argp->taglen + 8); 1013 SAVEMEM(argp->tag, argp->taglen); 1014 READ32(argp->minorversion); 1015 READ32(argp->opcnt); 1016 1017 if (argp->taglen > NFSD4_MAX_TAGLEN) 1018 goto xdr_error; 1019 if (argp->opcnt > 100) 1020 goto xdr_error; 1021 1022 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1023 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1024 if (!argp->ops) { 1025 argp->ops = argp->iops; 1026 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1027 goto xdr_error; 1028 } 1029 } 1030 1031 for (i = 0; i < argp->opcnt; i++) { 1032 op = &argp->ops[i]; 1033 op->replay = NULL; 1034 1035 /* 1036 * We can't use READ_BUF() here because we need to handle 1037 * a missing opcode as an OP_WRITE + 1. So we need to check 1038 * to see if we're truly at the end of our buffer or if there 1039 * is another page we need to flip to. 1040 */ 1041 1042 if (argp->p == argp->end) { 1043 if (argp->pagelen < 4) { 1044 /* There isn't an opcode still on the wire */ 1045 op->opnum = OP_WRITE + 1; 1046 op->status = nfserr_bad_xdr; 1047 argp->opcnt = i+1; 1048 break; 1049 } 1050 1051 /* 1052 * False alarm. We just hit a page boundary, but there 1053 * is still data available. Move pointer across page 1054 * boundary. *snip from READ_BUF* 1055 */ 1056 argp->p = page_address(argp->pagelist[0]); 1057 argp->pagelist++; 1058 if (argp->pagelen < PAGE_SIZE) { 1059 argp->end = p + (argp->pagelen>>2); 1060 argp->pagelen = 0; 1061 } else { 1062 argp->end = p + (PAGE_SIZE>>2); 1063 argp->pagelen -= PAGE_SIZE; 1064 } 1065 } 1066 op->opnum = ntohl(*argp->p++); 1067 1068 switch (op->opnum) { 1069 case 2: /* Reserved operation */ 1070 op->opnum = OP_ILLEGAL; 1071 if (argp->minorversion == 0) 1072 op->status = nfserr_op_illegal; 1073 else 1074 op->status = nfserr_minor_vers_mismatch; 1075 break; 1076 case OP_ACCESS: 1077 op->status = nfsd4_decode_access(argp, &op->u.access); 1078 break; 1079 case OP_CLOSE: 1080 op->status = nfsd4_decode_close(argp, &op->u.close); 1081 break; 1082 case OP_COMMIT: 1083 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1084 break; 1085 case OP_CREATE: 1086 op->status = nfsd4_decode_create(argp, &op->u.create); 1087 break; 1088 case OP_DELEGRETURN: 1089 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1090 break; 1091 case OP_GETATTR: 1092 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1093 break; 1094 case OP_GETFH: 1095 op->status = nfs_ok; 1096 break; 1097 case OP_LINK: 1098 op->status = nfsd4_decode_link(argp, &op->u.link); 1099 break; 1100 case OP_LOCK: 1101 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1102 break; 1103 case OP_LOCKT: 1104 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1105 break; 1106 case OP_LOCKU: 1107 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1108 break; 1109 case OP_LOOKUP: 1110 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1111 break; 1112 case OP_LOOKUPP: 1113 op->status = nfs_ok; 1114 break; 1115 case OP_NVERIFY: 1116 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1117 break; 1118 case OP_OPEN: 1119 op->status = nfsd4_decode_open(argp, &op->u.open); 1120 break; 1121 case OP_OPEN_CONFIRM: 1122 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1123 break; 1124 case OP_OPEN_DOWNGRADE: 1125 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1126 break; 1127 case OP_PUTFH: 1128 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1129 break; 1130 case OP_PUTROOTFH: 1131 op->status = nfs_ok; 1132 break; 1133 case OP_READ: 1134 op->status = nfsd4_decode_read(argp, &op->u.read); 1135 break; 1136 case OP_READDIR: 1137 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1138 break; 1139 case OP_READLINK: 1140 op->status = nfs_ok; 1141 break; 1142 case OP_REMOVE: 1143 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1144 break; 1145 case OP_RENAME: 1146 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1147 break; 1148 case OP_RESTOREFH: 1149 op->status = nfs_ok; 1150 break; 1151 case OP_RENEW: 1152 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1153 break; 1154 case OP_SAVEFH: 1155 op->status = nfs_ok; 1156 break; 1157 case OP_SECINFO: 1158 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo); 1159 break; 1160 case OP_SETATTR: 1161 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1162 break; 1163 case OP_SETCLIENTID: 1164 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1165 break; 1166 case OP_SETCLIENTID_CONFIRM: 1167 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1168 break; 1169 case OP_VERIFY: 1170 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1171 break; 1172 case OP_WRITE: 1173 op->status = nfsd4_decode_write(argp, &op->u.write); 1174 break; 1175 case OP_RELEASE_LOCKOWNER: 1176 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1177 break; 1178 default: 1179 op->opnum = OP_ILLEGAL; 1180 op->status = nfserr_op_illegal; 1181 break; 1182 } 1183 1184 if (op->status) { 1185 argp->opcnt = i+1; 1186 break; 1187 } 1188 } 1189 1190 DECODE_TAIL; 1191 } 1192 /* 1193 * END OF "GENERIC" DECODE ROUTINES. 1194 */ 1195 1196 /* 1197 * START OF "GENERIC" ENCODE ROUTINES. 1198 * These may look a little ugly since they are imported from a "generic" 1199 * set of XDR encode/decode routines which are intended to be shared by 1200 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1201 * 1202 * If the pain of reading these is too great, it should be a straightforward 1203 * task to translate them into Linux-specific versions which are more 1204 * consistent with the style used in NFSv2/v3... 1205 */ 1206 #define ENCODE_HEAD __be32 *p 1207 1208 #define WRITE32(n) *p++ = htonl(n) 1209 #define WRITE64(n) do { \ 1210 *p++ = htonl((u32)((n) >> 32)); \ 1211 *p++ = htonl((u32)(n)); \ 1212 } while (0) 1213 #define WRITEMEM(ptr,nbytes) do { \ 1214 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1215 memcpy(p, ptr, nbytes); \ 1216 p += XDR_QUADLEN(nbytes); \ 1217 } while (0) 1218 #define WRITECINFO(c) do { \ 1219 *p++ = htonl(c.atomic); \ 1220 *p++ = htonl(c.before_ctime_sec); \ 1221 *p++ = htonl(c.before_ctime_nsec); \ 1222 *p++ = htonl(c.after_ctime_sec); \ 1223 *p++ = htonl(c.after_ctime_nsec); \ 1224 } while (0) 1225 1226 #define RESERVE_SPACE(nbytes) do { \ 1227 p = resp->p; \ 1228 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1229 } while (0) 1230 #define ADJUST_ARGS() resp->p = p 1231 1232 /* 1233 * Header routine to setup seqid operation replay cache 1234 */ 1235 #define ENCODE_SEQID_OP_HEAD \ 1236 __be32 *p; \ 1237 __be32 *save; \ 1238 \ 1239 save = resp->p; 1240 1241 /* 1242 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1243 * is where sequence id's are incremented, and the replay cache is filled. 1244 * Note that we increment sequence id's here, at the last moment, so we're sure 1245 * we know whether the error to be returned is a sequence id mutating error. 1246 */ 1247 1248 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1249 if (seqid_mutating_err(nfserr) && stateowner) { \ 1250 stateowner->so_seqid++; \ 1251 stateowner->so_replay.rp_status = nfserr; \ 1252 stateowner->so_replay.rp_buflen = \ 1253 (((char *)(resp)->p - (char *)save)); \ 1254 memcpy(stateowner->so_replay.rp_buf, save, \ 1255 stateowner->so_replay.rp_buflen); \ 1256 } } while (0); 1257 1258 /* Encode as an array of strings the string given with components 1259 * seperated @sep. 1260 */ 1261 static __be32 nfsd4_encode_components(char sep, char *components, 1262 __be32 **pp, int *buflen) 1263 { 1264 __be32 *p = *pp; 1265 __be32 *countp = p; 1266 int strlen, count=0; 1267 char *str, *end; 1268 1269 dprintk("nfsd4_encode_components(%s)\n", components); 1270 if ((*buflen -= 4) < 0) 1271 return nfserr_resource; 1272 WRITE32(0); /* We will fill this in with @count later */ 1273 end = str = components; 1274 while (*end) { 1275 for (; *end && (*end != sep); end++) 1276 ; /* Point to end of component */ 1277 strlen = end - str; 1278 if (strlen) { 1279 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1280 return nfserr_resource; 1281 WRITE32(strlen); 1282 WRITEMEM(str, strlen); 1283 count++; 1284 } 1285 else 1286 end++; 1287 str = end; 1288 } 1289 *pp = p; 1290 p = countp; 1291 WRITE32(count); 1292 return 0; 1293 } 1294 1295 /* 1296 * encode a location element of a fs_locations structure 1297 */ 1298 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1299 __be32 **pp, int *buflen) 1300 { 1301 __be32 status; 1302 __be32 *p = *pp; 1303 1304 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1305 if (status) 1306 return status; 1307 status = nfsd4_encode_components('/', location->path, &p, buflen); 1308 if (status) 1309 return status; 1310 *pp = p; 1311 return 0; 1312 } 1313 1314 /* 1315 * Return the path to an export point in the pseudo filesystem namespace 1316 * Returned string is safe to use as long as the caller holds a reference 1317 * to @exp. 1318 */ 1319 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1320 { 1321 struct svc_fh tmp_fh; 1322 char *path, *rootpath; 1323 1324 fh_init(&tmp_fh, NFS4_FHSIZE); 1325 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1326 if (*stat) 1327 return NULL; 1328 rootpath = tmp_fh.fh_export->ex_path; 1329 1330 path = exp->ex_path; 1331 1332 if (strncmp(path, rootpath, strlen(rootpath))) { 1333 dprintk("nfsd: fs_locations failed;" 1334 "%s is not contained in %s\n", path, rootpath); 1335 *stat = nfserr_notsupp; 1336 return NULL; 1337 } 1338 1339 return path + strlen(rootpath); 1340 } 1341 1342 /* 1343 * encode a fs_locations structure 1344 */ 1345 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1346 struct svc_export *exp, 1347 __be32 **pp, int *buflen) 1348 { 1349 __be32 status; 1350 int i; 1351 __be32 *p = *pp; 1352 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1353 char *root = nfsd4_path(rqstp, exp, &status); 1354 1355 if (status) 1356 return status; 1357 status = nfsd4_encode_components('/', root, &p, buflen); 1358 if (status) 1359 return status; 1360 if ((*buflen -= 4) < 0) 1361 return nfserr_resource; 1362 WRITE32(fslocs->locations_count); 1363 for (i=0; i<fslocs->locations_count; i++) { 1364 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1365 &p, buflen); 1366 if (status) 1367 return status; 1368 } 1369 *pp = p; 1370 return 0; 1371 } 1372 1373 static u32 nfs4_ftypes[16] = { 1374 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1375 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1376 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1377 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1378 }; 1379 1380 static __be32 1381 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1382 __be32 **p, int *buflen) 1383 { 1384 int status; 1385 1386 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1387 return nfserr_resource; 1388 if (whotype != NFS4_ACL_WHO_NAMED) 1389 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1390 else if (group) 1391 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1392 else 1393 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1394 if (status < 0) 1395 return nfserrno(status); 1396 *p = xdr_encode_opaque(*p, NULL, status); 1397 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1398 BUG_ON(*buflen < 0); 1399 return 0; 1400 } 1401 1402 static inline __be32 1403 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1404 { 1405 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1406 } 1407 1408 static inline __be32 1409 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1410 { 1411 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1412 } 1413 1414 static inline __be32 1415 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1416 __be32 **p, int *buflen) 1417 { 1418 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1419 } 1420 1421 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1422 FATTR4_WORD0_RDATTR_ERROR) 1423 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1424 1425 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1426 { 1427 /* As per referral draft: */ 1428 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1429 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1430 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1431 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1432 *rdattr_err = NFSERR_MOVED; 1433 else 1434 return nfserr_moved; 1435 } 1436 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1437 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1438 return 0; 1439 } 1440 1441 /* 1442 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1443 * ourselves. 1444 * 1445 * @countp is the buffer size in _words_; upon successful return this becomes 1446 * replaced with the number of words written. 1447 */ 1448 __be32 1449 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1450 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1451 struct svc_rqst *rqstp) 1452 { 1453 u32 bmval0 = bmval[0]; 1454 u32 bmval1 = bmval[1]; 1455 struct kstat stat; 1456 struct svc_fh tempfh; 1457 struct kstatfs statfs; 1458 int buflen = *countp << 2; 1459 __be32 *attrlenp; 1460 u32 dummy; 1461 u64 dummy64; 1462 u32 rdattr_err = 0; 1463 __be32 *p = buffer; 1464 __be32 status; 1465 int err; 1466 int aclsupport = 0; 1467 struct nfs4_acl *acl = NULL; 1468 1469 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1470 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1471 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1472 1473 if (exp->ex_fslocs.migrated) { 1474 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1475 if (status) 1476 goto out; 1477 } 1478 1479 err = vfs_getattr(exp->ex_mnt, dentry, &stat); 1480 if (err) 1481 goto out_nfserr; 1482 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1483 FATTR4_WORD0_MAXNAME)) || 1484 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1485 FATTR4_WORD1_SPACE_TOTAL))) { 1486 err = vfs_statfs(dentry, &statfs); 1487 if (err) 1488 goto out_nfserr; 1489 } 1490 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1491 fh_init(&tempfh, NFS4_FHSIZE); 1492 status = fh_compose(&tempfh, exp, dentry, NULL); 1493 if (status) 1494 goto out; 1495 fhp = &tempfh; 1496 } 1497 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1498 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1499 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1500 aclsupport = (err == 0); 1501 if (bmval0 & FATTR4_WORD0_ACL) { 1502 if (err == -EOPNOTSUPP) 1503 bmval0 &= ~FATTR4_WORD0_ACL; 1504 else if (err == -EINVAL) { 1505 status = nfserr_attrnotsupp; 1506 goto out; 1507 } else if (err != 0) 1508 goto out_nfserr; 1509 } 1510 } 1511 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1512 if (exp->ex_fslocs.locations == NULL) { 1513 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1514 } 1515 } 1516 if ((buflen -= 16) < 0) 1517 goto out_resource; 1518 1519 WRITE32(2); 1520 WRITE32(bmval0); 1521 WRITE32(bmval1); 1522 attrlenp = p++; /* to be backfilled later */ 1523 1524 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1525 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1526 if ((buflen -= 12) < 0) 1527 goto out_resource; 1528 if (!aclsupport) 1529 word0 &= ~FATTR4_WORD0_ACL; 1530 if (!exp->ex_fslocs.locations) 1531 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1532 WRITE32(2); 1533 WRITE32(word0); 1534 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1535 } 1536 if (bmval0 & FATTR4_WORD0_TYPE) { 1537 if ((buflen -= 4) < 0) 1538 goto out_resource; 1539 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1540 if (dummy == NF4BAD) 1541 goto out_serverfault; 1542 WRITE32(dummy); 1543 } 1544 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1545 if ((buflen -= 4) < 0) 1546 goto out_resource; 1547 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1548 WRITE32(NFS4_FH_PERSISTENT); 1549 else 1550 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1551 } 1552 if (bmval0 & FATTR4_WORD0_CHANGE) { 1553 /* 1554 * Note: This _must_ be consistent with the scheme for writing 1555 * change_info, so any changes made here must be reflected there 1556 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1557 * macro above.) 1558 */ 1559 if ((buflen -= 8) < 0) 1560 goto out_resource; 1561 WRITE32(stat.ctime.tv_sec); 1562 WRITE32(stat.ctime.tv_nsec); 1563 } 1564 if (bmval0 & FATTR4_WORD0_SIZE) { 1565 if ((buflen -= 8) < 0) 1566 goto out_resource; 1567 WRITE64(stat.size); 1568 } 1569 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1570 if ((buflen -= 4) < 0) 1571 goto out_resource; 1572 WRITE32(1); 1573 } 1574 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1575 if ((buflen -= 4) < 0) 1576 goto out_resource; 1577 WRITE32(1); 1578 } 1579 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1580 if ((buflen -= 4) < 0) 1581 goto out_resource; 1582 WRITE32(0); 1583 } 1584 if (bmval0 & FATTR4_WORD0_FSID) { 1585 if ((buflen -= 16) < 0) 1586 goto out_resource; 1587 if (exp->ex_fslocs.migrated) { 1588 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1589 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1590 } else switch(fsid_source(fhp)) { 1591 case FSIDSOURCE_FSID: 1592 WRITE64((u64)exp->ex_fsid); 1593 WRITE64((u64)0); 1594 break; 1595 case FSIDSOURCE_DEV: 1596 WRITE32(0); 1597 WRITE32(MAJOR(stat.dev)); 1598 WRITE32(0); 1599 WRITE32(MINOR(stat.dev)); 1600 break; 1601 case FSIDSOURCE_UUID: 1602 WRITEMEM(exp->ex_uuid, 16); 1603 break; 1604 } 1605 } 1606 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1607 if ((buflen -= 4) < 0) 1608 goto out_resource; 1609 WRITE32(0); 1610 } 1611 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1612 if ((buflen -= 4) < 0) 1613 goto out_resource; 1614 WRITE32(NFSD_LEASE_TIME); 1615 } 1616 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1617 if ((buflen -= 4) < 0) 1618 goto out_resource; 1619 WRITE32(rdattr_err); 1620 } 1621 if (bmval0 & FATTR4_WORD0_ACL) { 1622 struct nfs4_ace *ace; 1623 1624 if (acl == NULL) { 1625 if ((buflen -= 4) < 0) 1626 goto out_resource; 1627 1628 WRITE32(0); 1629 goto out_acl; 1630 } 1631 if ((buflen -= 4) < 0) 1632 goto out_resource; 1633 WRITE32(acl->naces); 1634 1635 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1636 if ((buflen -= 4*3) < 0) 1637 goto out_resource; 1638 WRITE32(ace->type); 1639 WRITE32(ace->flag); 1640 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1641 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1642 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1643 &p, &buflen); 1644 if (status == nfserr_resource) 1645 goto out_resource; 1646 if (status) 1647 goto out; 1648 } 1649 } 1650 out_acl: 1651 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1652 if ((buflen -= 4) < 0) 1653 goto out_resource; 1654 WRITE32(aclsupport ? 1655 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1656 } 1657 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1658 if ((buflen -= 4) < 0) 1659 goto out_resource; 1660 WRITE32(1); 1661 } 1662 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1663 if ((buflen -= 4) < 0) 1664 goto out_resource; 1665 WRITE32(1); 1666 } 1667 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1668 if ((buflen -= 4) < 0) 1669 goto out_resource; 1670 WRITE32(1); 1671 } 1672 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1673 if ((buflen -= 4) < 0) 1674 goto out_resource; 1675 WRITE32(1); 1676 } 1677 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1678 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1679 if (buflen < 0) 1680 goto out_resource; 1681 WRITE32(fhp->fh_handle.fh_size); 1682 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1683 } 1684 if (bmval0 & FATTR4_WORD0_FILEID) { 1685 if ((buflen -= 8) < 0) 1686 goto out_resource; 1687 WRITE64(stat.ino); 1688 } 1689 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1690 if ((buflen -= 8) < 0) 1691 goto out_resource; 1692 WRITE64((u64) statfs.f_ffree); 1693 } 1694 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1695 if ((buflen -= 8) < 0) 1696 goto out_resource; 1697 WRITE64((u64) statfs.f_ffree); 1698 } 1699 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1700 if ((buflen -= 8) < 0) 1701 goto out_resource; 1702 WRITE64((u64) statfs.f_files); 1703 } 1704 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1705 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1706 if (status == nfserr_resource) 1707 goto out_resource; 1708 if (status) 1709 goto out; 1710 } 1711 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1712 if ((buflen -= 4) < 0) 1713 goto out_resource; 1714 WRITE32(1); 1715 } 1716 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1717 if ((buflen -= 8) < 0) 1718 goto out_resource; 1719 WRITE64(~(u64)0); 1720 } 1721 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1722 if ((buflen -= 4) < 0) 1723 goto out_resource; 1724 WRITE32(255); 1725 } 1726 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1727 if ((buflen -= 4) < 0) 1728 goto out_resource; 1729 WRITE32(statfs.f_namelen); 1730 } 1731 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1732 if ((buflen -= 8) < 0) 1733 goto out_resource; 1734 WRITE64((u64) svc_max_payload(rqstp)); 1735 } 1736 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1737 if ((buflen -= 8) < 0) 1738 goto out_resource; 1739 WRITE64((u64) svc_max_payload(rqstp)); 1740 } 1741 if (bmval1 & FATTR4_WORD1_MODE) { 1742 if ((buflen -= 4) < 0) 1743 goto out_resource; 1744 WRITE32(stat.mode & S_IALLUGO); 1745 } 1746 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1747 if ((buflen -= 4) < 0) 1748 goto out_resource; 1749 WRITE32(1); 1750 } 1751 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1752 if ((buflen -= 4) < 0) 1753 goto out_resource; 1754 WRITE32(stat.nlink); 1755 } 1756 if (bmval1 & FATTR4_WORD1_OWNER) { 1757 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1758 if (status == nfserr_resource) 1759 goto out_resource; 1760 if (status) 1761 goto out; 1762 } 1763 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1764 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1765 if (status == nfserr_resource) 1766 goto out_resource; 1767 if (status) 1768 goto out; 1769 } 1770 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1771 if ((buflen -= 8) < 0) 1772 goto out_resource; 1773 WRITE32((u32) MAJOR(stat.rdev)); 1774 WRITE32((u32) MINOR(stat.rdev)); 1775 } 1776 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1777 if ((buflen -= 8) < 0) 1778 goto out_resource; 1779 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1780 WRITE64(dummy64); 1781 } 1782 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1783 if ((buflen -= 8) < 0) 1784 goto out_resource; 1785 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1786 WRITE64(dummy64); 1787 } 1788 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1789 if ((buflen -= 8) < 0) 1790 goto out_resource; 1791 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1792 WRITE64(dummy64); 1793 } 1794 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1795 if ((buflen -= 8) < 0) 1796 goto out_resource; 1797 dummy64 = (u64)stat.blocks << 9; 1798 WRITE64(dummy64); 1799 } 1800 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1801 if ((buflen -= 12) < 0) 1802 goto out_resource; 1803 WRITE32(0); 1804 WRITE32(stat.atime.tv_sec); 1805 WRITE32(stat.atime.tv_nsec); 1806 } 1807 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1808 if ((buflen -= 12) < 0) 1809 goto out_resource; 1810 WRITE32(0); 1811 WRITE32(1); 1812 WRITE32(0); 1813 } 1814 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1815 if ((buflen -= 12) < 0) 1816 goto out_resource; 1817 WRITE32(0); 1818 WRITE32(stat.ctime.tv_sec); 1819 WRITE32(stat.ctime.tv_nsec); 1820 } 1821 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1822 if ((buflen -= 12) < 0) 1823 goto out_resource; 1824 WRITE32(0); 1825 WRITE32(stat.mtime.tv_sec); 1826 WRITE32(stat.mtime.tv_nsec); 1827 } 1828 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1829 if ((buflen -= 8) < 0) 1830 goto out_resource; 1831 if (exp->ex_mnt->mnt_root->d_inode == dentry->d_inode) { 1832 err = vfs_getattr(exp->ex_mnt->mnt_parent, 1833 exp->ex_mnt->mnt_mountpoint, &stat); 1834 if (err) 1835 goto out_nfserr; 1836 } 1837 WRITE64(stat.ino); 1838 } 1839 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1840 *countp = p - buffer; 1841 status = nfs_ok; 1842 1843 out: 1844 kfree(acl); 1845 if (fhp == &tempfh) 1846 fh_put(&tempfh); 1847 return status; 1848 out_nfserr: 1849 status = nfserrno(err); 1850 goto out; 1851 out_resource: 1852 *countp = 0; 1853 status = nfserr_resource; 1854 goto out; 1855 out_serverfault: 1856 status = nfserr_serverfault; 1857 goto out; 1858 } 1859 1860 static __be32 1861 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1862 const char *name, int namlen, __be32 *p, int *buflen) 1863 { 1864 struct svc_export *exp = cd->rd_fhp->fh_export; 1865 struct dentry *dentry; 1866 __be32 nfserr; 1867 1868 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1869 if (IS_ERR(dentry)) 1870 return nfserrno(PTR_ERR(dentry)); 1871 1872 exp_get(exp); 1873 if (d_mountpoint(dentry)) { 1874 int err; 1875 1876 /* 1877 * Why the heck aren't we just using nfsd_lookup?? 1878 * Different "."/".." handling? Something else? 1879 * At least, add a comment here to explain.... 1880 */ 1881 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1882 if (err) { 1883 nfserr = nfserrno(err); 1884 goto out_put; 1885 } 1886 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 1887 if (nfserr) 1888 goto out_put; 1889 1890 } 1891 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1892 cd->rd_rqstp); 1893 out_put: 1894 dput(dentry); 1895 exp_put(exp); 1896 return nfserr; 1897 } 1898 1899 static __be32 * 1900 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1901 { 1902 __be32 *attrlenp; 1903 1904 if (buflen < 6) 1905 return NULL; 1906 *p++ = htonl(2); 1907 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1908 *p++ = htonl(0); /* bmval1 */ 1909 1910 attrlenp = p++; 1911 *p++ = nfserr; /* no htonl */ 1912 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1913 return p; 1914 } 1915 1916 static int 1917 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1918 loff_t offset, u64 ino, unsigned int d_type) 1919 { 1920 struct readdir_cd *ccd = ccdv; 1921 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1922 int buflen; 1923 __be32 *p = cd->buffer; 1924 __be32 nfserr = nfserr_toosmall; 1925 1926 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1927 if (name && isdotent(name, namlen)) { 1928 cd->common.err = nfs_ok; 1929 return 0; 1930 } 1931 1932 if (cd->offset) 1933 xdr_encode_hyper(cd->offset, (u64) offset); 1934 1935 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1936 if (buflen < 0) 1937 goto fail; 1938 1939 *p++ = xdr_one; /* mark entry present */ 1940 cd->offset = p; /* remember pointer */ 1941 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1942 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1943 1944 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1945 switch (nfserr) { 1946 case nfs_ok: 1947 p += buflen; 1948 break; 1949 case nfserr_resource: 1950 nfserr = nfserr_toosmall; 1951 goto fail; 1952 case nfserr_dropit: 1953 goto fail; 1954 default: 1955 /* 1956 * If the client requested the RDATTR_ERROR attribute, 1957 * we stuff the error code into this attribute 1958 * and continue. If this attribute was not requested, 1959 * then in accordance with the spec, we fail the 1960 * entire READDIR operation(!) 1961 */ 1962 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1963 goto fail; 1964 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1965 if (p == NULL) { 1966 nfserr = nfserr_toosmall; 1967 goto fail; 1968 } 1969 } 1970 cd->buflen -= (p - cd->buffer); 1971 cd->buffer = p; 1972 cd->common.err = nfs_ok; 1973 return 0; 1974 fail: 1975 cd->common.err = nfserr; 1976 return -EINVAL; 1977 } 1978 1979 static void 1980 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1981 { 1982 ENCODE_HEAD; 1983 1984 if (!nfserr) { 1985 RESERVE_SPACE(8); 1986 WRITE32(access->ac_supported); 1987 WRITE32(access->ac_resp_access); 1988 ADJUST_ARGS(); 1989 } 1990 } 1991 1992 static void 1993 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 1994 { 1995 ENCODE_SEQID_OP_HEAD; 1996 1997 if (!nfserr) { 1998 RESERVE_SPACE(sizeof(stateid_t)); 1999 WRITE32(close->cl_stateid.si_generation); 2000 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 2001 ADJUST_ARGS(); 2002 } 2003 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2004 } 2005 2006 2007 static void 2008 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2009 { 2010 ENCODE_HEAD; 2011 2012 if (!nfserr) { 2013 RESERVE_SPACE(8); 2014 WRITEMEM(commit->co_verf.data, 8); 2015 ADJUST_ARGS(); 2016 } 2017 } 2018 2019 static void 2020 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2021 { 2022 ENCODE_HEAD; 2023 2024 if (!nfserr) { 2025 RESERVE_SPACE(32); 2026 WRITECINFO(create->cr_cinfo); 2027 WRITE32(2); 2028 WRITE32(create->cr_bmval[0]); 2029 WRITE32(create->cr_bmval[1]); 2030 ADJUST_ARGS(); 2031 } 2032 } 2033 2034 static __be32 2035 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2036 { 2037 struct svc_fh *fhp = getattr->ga_fhp; 2038 int buflen; 2039 2040 if (nfserr) 2041 return nfserr; 2042 2043 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2044 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2045 resp->p, &buflen, getattr->ga_bmval, 2046 resp->rqstp); 2047 if (!nfserr) 2048 resp->p += buflen; 2049 return nfserr; 2050 } 2051 2052 static void 2053 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2054 { 2055 unsigned int len; 2056 ENCODE_HEAD; 2057 2058 if (!nfserr) { 2059 len = fhp->fh_handle.fh_size; 2060 RESERVE_SPACE(len + 4); 2061 WRITE32(len); 2062 WRITEMEM(&fhp->fh_handle.fh_base, len); 2063 ADJUST_ARGS(); 2064 } 2065 } 2066 2067 /* 2068 * Including all fields other than the name, a LOCK4denied structure requires 2069 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2070 */ 2071 static void 2072 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2073 { 2074 ENCODE_HEAD; 2075 2076 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2077 WRITE64(ld->ld_start); 2078 WRITE64(ld->ld_length); 2079 WRITE32(ld->ld_type); 2080 if (ld->ld_sop) { 2081 WRITEMEM(&ld->ld_clientid, 8); 2082 WRITE32(ld->ld_sop->so_owner.len); 2083 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2084 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2085 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2086 WRITE64((u64)0); /* clientid */ 2087 WRITE32(0); /* length of owner name */ 2088 } 2089 ADJUST_ARGS(); 2090 } 2091 2092 static void 2093 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2094 { 2095 ENCODE_SEQID_OP_HEAD; 2096 2097 if (!nfserr) { 2098 RESERVE_SPACE(4 + sizeof(stateid_t)); 2099 WRITE32(lock->lk_resp_stateid.si_generation); 2100 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2101 ADJUST_ARGS(); 2102 } else if (nfserr == nfserr_denied) 2103 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2104 2105 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2106 } 2107 2108 static void 2109 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2110 { 2111 if (nfserr == nfserr_denied) 2112 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2113 } 2114 2115 static void 2116 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2117 { 2118 ENCODE_SEQID_OP_HEAD; 2119 2120 if (!nfserr) { 2121 RESERVE_SPACE(sizeof(stateid_t)); 2122 WRITE32(locku->lu_stateid.si_generation); 2123 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2124 ADJUST_ARGS(); 2125 } 2126 2127 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2128 } 2129 2130 2131 static void 2132 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2133 { 2134 ENCODE_HEAD; 2135 2136 if (!nfserr) { 2137 RESERVE_SPACE(20); 2138 WRITECINFO(link->li_cinfo); 2139 ADJUST_ARGS(); 2140 } 2141 } 2142 2143 2144 static void 2145 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2146 { 2147 ENCODE_SEQID_OP_HEAD; 2148 2149 if (nfserr) 2150 goto out; 2151 2152 RESERVE_SPACE(36 + sizeof(stateid_t)); 2153 WRITE32(open->op_stateid.si_generation); 2154 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2155 WRITECINFO(open->op_cinfo); 2156 WRITE32(open->op_rflags); 2157 WRITE32(2); 2158 WRITE32(open->op_bmval[0]); 2159 WRITE32(open->op_bmval[1]); 2160 WRITE32(open->op_delegate_type); 2161 ADJUST_ARGS(); 2162 2163 switch (open->op_delegate_type) { 2164 case NFS4_OPEN_DELEGATE_NONE: 2165 break; 2166 case NFS4_OPEN_DELEGATE_READ: 2167 RESERVE_SPACE(20 + sizeof(stateid_t)); 2168 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2169 WRITE32(open->op_recall); 2170 2171 /* 2172 * TODO: ACE's in delegations 2173 */ 2174 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2175 WRITE32(0); 2176 WRITE32(0); 2177 WRITE32(0); /* XXX: is NULL principal ok? */ 2178 ADJUST_ARGS(); 2179 break; 2180 case NFS4_OPEN_DELEGATE_WRITE: 2181 RESERVE_SPACE(32 + sizeof(stateid_t)); 2182 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2183 WRITE32(0); 2184 2185 /* 2186 * TODO: space_limit's in delegations 2187 */ 2188 WRITE32(NFS4_LIMIT_SIZE); 2189 WRITE32(~(u32)0); 2190 WRITE32(~(u32)0); 2191 2192 /* 2193 * TODO: ACE's in delegations 2194 */ 2195 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2196 WRITE32(0); 2197 WRITE32(0); 2198 WRITE32(0); /* XXX: is NULL principal ok? */ 2199 ADJUST_ARGS(); 2200 break; 2201 default: 2202 BUG(); 2203 } 2204 /* XXX save filehandle here */ 2205 out: 2206 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2207 } 2208 2209 static void 2210 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2211 { 2212 ENCODE_SEQID_OP_HEAD; 2213 2214 if (!nfserr) { 2215 RESERVE_SPACE(sizeof(stateid_t)); 2216 WRITE32(oc->oc_resp_stateid.si_generation); 2217 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2218 ADJUST_ARGS(); 2219 } 2220 2221 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2222 } 2223 2224 static void 2225 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2226 { 2227 ENCODE_SEQID_OP_HEAD; 2228 2229 if (!nfserr) { 2230 RESERVE_SPACE(sizeof(stateid_t)); 2231 WRITE32(od->od_stateid.si_generation); 2232 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2233 ADJUST_ARGS(); 2234 } 2235 2236 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2237 } 2238 2239 static __be32 2240 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2241 struct nfsd4_read *read) 2242 { 2243 u32 eof; 2244 int v, pn; 2245 unsigned long maxcount; 2246 long len; 2247 ENCODE_HEAD; 2248 2249 if (nfserr) 2250 return nfserr; 2251 if (resp->xbuf->page_len) 2252 return nfserr_resource; 2253 2254 RESERVE_SPACE(8); /* eof flag and byte count */ 2255 2256 maxcount = svc_max_payload(resp->rqstp); 2257 if (maxcount > read->rd_length) 2258 maxcount = read->rd_length; 2259 2260 len = maxcount; 2261 v = 0; 2262 while (len > 0) { 2263 pn = resp->rqstp->rq_resused++; 2264 resp->rqstp->rq_vec[v].iov_base = 2265 page_address(resp->rqstp->rq_respages[pn]); 2266 resp->rqstp->rq_vec[v].iov_len = 2267 len < PAGE_SIZE ? len : PAGE_SIZE; 2268 v++; 2269 len -= PAGE_SIZE; 2270 } 2271 read->rd_vlen = v; 2272 2273 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2274 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2275 &maxcount); 2276 2277 if (nfserr == nfserr_symlink) 2278 nfserr = nfserr_inval; 2279 if (nfserr) 2280 return nfserr; 2281 eof = (read->rd_offset + maxcount >= 2282 read->rd_fhp->fh_dentry->d_inode->i_size); 2283 2284 WRITE32(eof); 2285 WRITE32(maxcount); 2286 ADJUST_ARGS(); 2287 resp->xbuf->head[0].iov_len = (char*)p 2288 - (char*)resp->xbuf->head[0].iov_base; 2289 resp->xbuf->page_len = maxcount; 2290 2291 /* Use rest of head for padding and remaining ops: */ 2292 resp->xbuf->tail[0].iov_base = p; 2293 resp->xbuf->tail[0].iov_len = 0; 2294 if (maxcount&3) { 2295 RESERVE_SPACE(4); 2296 WRITE32(0); 2297 resp->xbuf->tail[0].iov_base += maxcount&3; 2298 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2299 ADJUST_ARGS(); 2300 } 2301 return 0; 2302 } 2303 2304 static __be32 2305 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2306 { 2307 int maxcount; 2308 char *page; 2309 ENCODE_HEAD; 2310 2311 if (nfserr) 2312 return nfserr; 2313 if (resp->xbuf->page_len) 2314 return nfserr_resource; 2315 2316 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2317 2318 maxcount = PAGE_SIZE; 2319 RESERVE_SPACE(4); 2320 2321 /* 2322 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2323 * if they would overflow the buffer. Is this kosher in NFSv4? If 2324 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2325 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2326 */ 2327 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2328 if (nfserr == nfserr_isdir) 2329 return nfserr_inval; 2330 if (nfserr) 2331 return nfserr; 2332 2333 WRITE32(maxcount); 2334 ADJUST_ARGS(); 2335 resp->xbuf->head[0].iov_len = (char*)p 2336 - (char*)resp->xbuf->head[0].iov_base; 2337 resp->xbuf->page_len = maxcount; 2338 2339 /* Use rest of head for padding and remaining ops: */ 2340 resp->xbuf->tail[0].iov_base = p; 2341 resp->xbuf->tail[0].iov_len = 0; 2342 if (maxcount&3) { 2343 RESERVE_SPACE(4); 2344 WRITE32(0); 2345 resp->xbuf->tail[0].iov_base += maxcount&3; 2346 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2347 ADJUST_ARGS(); 2348 } 2349 return 0; 2350 } 2351 2352 static __be32 2353 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2354 { 2355 int maxcount; 2356 loff_t offset; 2357 __be32 *page, *savep, *tailbase; 2358 ENCODE_HEAD; 2359 2360 if (nfserr) 2361 return nfserr; 2362 if (resp->xbuf->page_len) 2363 return nfserr_resource; 2364 2365 RESERVE_SPACE(8); /* verifier */ 2366 savep = p; 2367 2368 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2369 WRITE32(0); 2370 WRITE32(0); 2371 ADJUST_ARGS(); 2372 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2373 tailbase = p; 2374 2375 maxcount = PAGE_SIZE; 2376 if (maxcount > readdir->rd_maxcount) 2377 maxcount = readdir->rd_maxcount; 2378 2379 /* 2380 * Convert from bytes to words, account for the two words already 2381 * written, make sure to leave two words at the end for the next 2382 * pointer and eof field. 2383 */ 2384 maxcount = (maxcount >> 2) - 4; 2385 if (maxcount < 0) { 2386 nfserr = nfserr_toosmall; 2387 goto err_no_verf; 2388 } 2389 2390 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2391 readdir->common.err = 0; 2392 readdir->buflen = maxcount; 2393 readdir->buffer = page; 2394 readdir->offset = NULL; 2395 2396 offset = readdir->rd_cookie; 2397 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2398 &offset, 2399 &readdir->common, nfsd4_encode_dirent); 2400 if (nfserr == nfs_ok && 2401 readdir->common.err == nfserr_toosmall && 2402 readdir->buffer == page) 2403 nfserr = nfserr_toosmall; 2404 if (nfserr == nfserr_symlink) 2405 nfserr = nfserr_notdir; 2406 if (nfserr) 2407 goto err_no_verf; 2408 2409 if (readdir->offset) 2410 xdr_encode_hyper(readdir->offset, offset); 2411 2412 p = readdir->buffer; 2413 *p++ = 0; /* no more entries */ 2414 *p++ = htonl(readdir->common.err == nfserr_eof); 2415 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2416 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2417 2418 /* Use rest of head for padding and remaining ops: */ 2419 resp->xbuf->tail[0].iov_base = tailbase; 2420 resp->xbuf->tail[0].iov_len = 0; 2421 resp->p = resp->xbuf->tail[0].iov_base; 2422 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2423 2424 return 0; 2425 err_no_verf: 2426 p = savep; 2427 ADJUST_ARGS(); 2428 return nfserr; 2429 } 2430 2431 static void 2432 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2433 { 2434 ENCODE_HEAD; 2435 2436 if (!nfserr) { 2437 RESERVE_SPACE(20); 2438 WRITECINFO(remove->rm_cinfo); 2439 ADJUST_ARGS(); 2440 } 2441 } 2442 2443 static void 2444 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2445 { 2446 ENCODE_HEAD; 2447 2448 if (!nfserr) { 2449 RESERVE_SPACE(40); 2450 WRITECINFO(rename->rn_sinfo); 2451 WRITECINFO(rename->rn_tinfo); 2452 ADJUST_ARGS(); 2453 } 2454 } 2455 2456 static void 2457 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2458 struct nfsd4_secinfo *secinfo) 2459 { 2460 int i = 0; 2461 struct svc_export *exp = secinfo->si_exp; 2462 u32 nflavs; 2463 struct exp_flavor_info *flavs; 2464 struct exp_flavor_info def_flavs[2]; 2465 ENCODE_HEAD; 2466 2467 if (nfserr) 2468 goto out; 2469 if (exp->ex_nflavors) { 2470 flavs = exp->ex_flavors; 2471 nflavs = exp->ex_nflavors; 2472 } else { /* Handling of some defaults in absence of real secinfo: */ 2473 flavs = def_flavs; 2474 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2475 nflavs = 2; 2476 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2477 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2478 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2479 nflavs = 1; 2480 flavs[0].pseudoflavor 2481 = svcauth_gss_flavor(exp->ex_client); 2482 } else { 2483 nflavs = 1; 2484 flavs[0].pseudoflavor 2485 = exp->ex_client->flavour->flavour; 2486 } 2487 } 2488 2489 RESERVE_SPACE(4); 2490 WRITE32(nflavs); 2491 ADJUST_ARGS(); 2492 for (i = 0; i < nflavs; i++) { 2493 u32 flav = flavs[i].pseudoflavor; 2494 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2495 2496 if (gm) { 2497 RESERVE_SPACE(4); 2498 WRITE32(RPC_AUTH_GSS); 2499 ADJUST_ARGS(); 2500 RESERVE_SPACE(4 + gm->gm_oid.len); 2501 WRITE32(gm->gm_oid.len); 2502 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2503 ADJUST_ARGS(); 2504 RESERVE_SPACE(4); 2505 WRITE32(0); /* qop */ 2506 ADJUST_ARGS(); 2507 RESERVE_SPACE(4); 2508 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2509 ADJUST_ARGS(); 2510 gss_mech_put(gm); 2511 } else { 2512 RESERVE_SPACE(4); 2513 WRITE32(flav); 2514 ADJUST_ARGS(); 2515 } 2516 } 2517 out: 2518 if (exp) 2519 exp_put(exp); 2520 } 2521 2522 /* 2523 * The SETATTR encode routine is special -- it always encodes a bitmap, 2524 * regardless of the error status. 2525 */ 2526 static void 2527 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2528 { 2529 ENCODE_HEAD; 2530 2531 RESERVE_SPACE(12); 2532 if (nfserr) { 2533 WRITE32(2); 2534 WRITE32(0); 2535 WRITE32(0); 2536 } 2537 else { 2538 WRITE32(2); 2539 WRITE32(setattr->sa_bmval[0]); 2540 WRITE32(setattr->sa_bmval[1]); 2541 } 2542 ADJUST_ARGS(); 2543 } 2544 2545 static void 2546 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2547 { 2548 ENCODE_HEAD; 2549 2550 if (!nfserr) { 2551 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2552 WRITEMEM(&scd->se_clientid, 8); 2553 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2554 ADJUST_ARGS(); 2555 } 2556 else if (nfserr == nfserr_clid_inuse) { 2557 RESERVE_SPACE(8); 2558 WRITE32(0); 2559 WRITE32(0); 2560 ADJUST_ARGS(); 2561 } 2562 } 2563 2564 static void 2565 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2566 { 2567 ENCODE_HEAD; 2568 2569 if (!nfserr) { 2570 RESERVE_SPACE(16); 2571 WRITE32(write->wr_bytes_written); 2572 WRITE32(write->wr_how_written); 2573 WRITEMEM(write->wr_verifier.data, 8); 2574 ADJUST_ARGS(); 2575 } 2576 } 2577 2578 void 2579 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2580 { 2581 __be32 *statp; 2582 ENCODE_HEAD; 2583 2584 RESERVE_SPACE(8); 2585 WRITE32(op->opnum); 2586 statp = p++; /* to be backfilled at the end */ 2587 ADJUST_ARGS(); 2588 2589 switch (op->opnum) { 2590 case OP_ACCESS: 2591 nfsd4_encode_access(resp, op->status, &op->u.access); 2592 break; 2593 case OP_CLOSE: 2594 nfsd4_encode_close(resp, op->status, &op->u.close); 2595 break; 2596 case OP_COMMIT: 2597 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2598 break; 2599 case OP_CREATE: 2600 nfsd4_encode_create(resp, op->status, &op->u.create); 2601 break; 2602 case OP_DELEGRETURN: 2603 break; 2604 case OP_GETATTR: 2605 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2606 break; 2607 case OP_GETFH: 2608 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2609 break; 2610 case OP_LINK: 2611 nfsd4_encode_link(resp, op->status, &op->u.link); 2612 break; 2613 case OP_LOCK: 2614 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2615 break; 2616 case OP_LOCKT: 2617 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2618 break; 2619 case OP_LOCKU: 2620 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2621 break; 2622 case OP_LOOKUP: 2623 break; 2624 case OP_LOOKUPP: 2625 break; 2626 case OP_NVERIFY: 2627 break; 2628 case OP_OPEN: 2629 nfsd4_encode_open(resp, op->status, &op->u.open); 2630 break; 2631 case OP_OPEN_CONFIRM: 2632 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2633 break; 2634 case OP_OPEN_DOWNGRADE: 2635 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2636 break; 2637 case OP_PUTFH: 2638 break; 2639 case OP_PUTROOTFH: 2640 break; 2641 case OP_READ: 2642 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2643 break; 2644 case OP_READDIR: 2645 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2646 break; 2647 case OP_READLINK: 2648 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2649 break; 2650 case OP_REMOVE: 2651 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2652 break; 2653 case OP_RENAME: 2654 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2655 break; 2656 case OP_RENEW: 2657 break; 2658 case OP_RESTOREFH: 2659 break; 2660 case OP_SAVEFH: 2661 break; 2662 case OP_SECINFO: 2663 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo); 2664 break; 2665 case OP_SETATTR: 2666 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2667 break; 2668 case OP_SETCLIENTID: 2669 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2670 break; 2671 case OP_SETCLIENTID_CONFIRM: 2672 break; 2673 case OP_VERIFY: 2674 break; 2675 case OP_WRITE: 2676 nfsd4_encode_write(resp, op->status, &op->u.write); 2677 break; 2678 case OP_RELEASE_LOCKOWNER: 2679 break; 2680 default: 2681 break; 2682 } 2683 2684 /* 2685 * Note: We write the status directly, instead of using WRITE32(), 2686 * since it is already in network byte order. 2687 */ 2688 *statp = op->status; 2689 } 2690 2691 /* 2692 * Encode the reply stored in the stateowner reply cache 2693 * 2694 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2695 * previously sent already encoded operation. 2696 * 2697 * called with nfs4_lock_state() held 2698 */ 2699 void 2700 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2701 { 2702 ENCODE_HEAD; 2703 struct nfs4_replay *rp = op->replay; 2704 2705 BUG_ON(!rp); 2706 2707 RESERVE_SPACE(8); 2708 WRITE32(op->opnum); 2709 *p++ = rp->rp_status; /* already xdr'ed */ 2710 ADJUST_ARGS(); 2711 2712 RESERVE_SPACE(rp->rp_buflen); 2713 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2714 ADJUST_ARGS(); 2715 } 2716 2717 /* 2718 * END OF "GENERIC" ENCODE ROUTINES. 2719 */ 2720 2721 int 2722 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2723 { 2724 return xdr_ressize_check(rqstp, p); 2725 } 2726 2727 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2728 { 2729 if (args->ops != args->iops) { 2730 kfree(args->ops); 2731 args->ops = args->iops; 2732 } 2733 kfree(args->tmpp); 2734 args->tmpp = NULL; 2735 while (args->to_free) { 2736 struct tmpbuf *tb = args->to_free; 2737 args->to_free = tb->next; 2738 tb->release(tb->buf); 2739 kfree(tb); 2740 } 2741 } 2742 2743 int 2744 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2745 { 2746 __be32 status; 2747 2748 args->p = p; 2749 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2750 args->pagelist = rqstp->rq_arg.pages; 2751 args->pagelen = rqstp->rq_arg.page_len; 2752 args->tmpp = NULL; 2753 args->to_free = NULL; 2754 args->ops = args->iops; 2755 args->rqstp = rqstp; 2756 2757 status = nfsd4_decode_compound(args); 2758 if (status) { 2759 nfsd4_release_compoundargs(args); 2760 } 2761 return !status; 2762 } 2763 2764 int 2765 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2766 { 2767 /* 2768 * All that remains is to write the tag and operation count... 2769 */ 2770 struct kvec *iov; 2771 p = resp->tagp; 2772 *p++ = htonl(resp->taglen); 2773 memcpy(p, resp->tag, resp->taglen); 2774 p += XDR_QUADLEN(resp->taglen); 2775 *p++ = htonl(resp->opcnt); 2776 2777 if (rqstp->rq_res.page_len) 2778 iov = &rqstp->rq_res.tail[0]; 2779 else 2780 iov = &rqstp->rq_res.head[0]; 2781 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2782 BUG_ON(iov->iov_len > PAGE_SIZE); 2783 return 1; 2784 } 2785 2786 /* 2787 * Local variables: 2788 * c-basic-offset: 8 2789 * End: 2790 */ 2791