1 /* 2 * Server-side XDR 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 * TODO: Neil Brown made the following observation: We currently 36 * initially reserve NFSD_BUFSIZE space on the transmit queue and 37 * never release any of that until the request is complete. 38 * It would be good to calculate a new maximum response size while 39 * decoding the COMPOUND, and call svc_reserve with this number 40 * at the end of nfs4svc_decode_compoundargs. 41 */ 42 43 #include <linux/namei.h> 44 #include <linux/statfs.h> 45 #include <linux/utsname.h> 46 #include <linux/nfsd_idmap.h> 47 #include <linux/nfs4_acl.h> 48 #include <linux/sunrpc/svcauth_gss.h> 49 50 #include "xdr4.h" 51 #include "vfs.h" 52 53 #define NFSDDBG_FACILITY NFSDDBG_XDR 54 55 /* 56 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 57 * directory in order to indicate to the client that a filesystem boundary is present 58 * We use a fixed fsid for a referral 59 */ 60 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 61 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 62 63 static __be32 64 check_filename(char *str, int len, __be32 err) 65 { 66 int i; 67 68 if (len == 0) 69 return nfserr_inval; 70 if (isdotent(str, len)) 71 return err; 72 for (i = 0; i < len; i++) 73 if (str[i] == '/') 74 return err; 75 return 0; 76 } 77 78 #define DECODE_HEAD \ 79 __be32 *p; \ 80 __be32 status 81 #define DECODE_TAIL \ 82 status = 0; \ 83 out: \ 84 return status; \ 85 xdr_error: \ 86 dprintk("NFSD: xdr error (%s:%d)\n", \ 87 __FILE__, __LINE__); \ 88 status = nfserr_bad_xdr; \ 89 goto out 90 91 #define READ32(x) (x) = ntohl(*p++) 92 #define READ64(x) do { \ 93 (x) = (u64)ntohl(*p++) << 32; \ 94 (x) |= ntohl(*p++); \ 95 } while (0) 96 #define READTIME(x) do { \ 97 p++; \ 98 (x) = ntohl(*p++); \ 99 p++; \ 100 } while (0) 101 #define READMEM(x,nbytes) do { \ 102 x = (char *)p; \ 103 p += XDR_QUADLEN(nbytes); \ 104 } while (0) 105 #define SAVEMEM(x,nbytes) do { \ 106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 107 savemem(argp, p, nbytes) : \ 108 (char *)p)) { \ 109 dprintk("NFSD: xdr error (%s:%d)\n", \ 110 __FILE__, __LINE__); \ 111 goto xdr_error; \ 112 } \ 113 p += XDR_QUADLEN(nbytes); \ 114 } while (0) 115 #define COPYMEM(x,nbytes) do { \ 116 memcpy((x), p, nbytes); \ 117 p += XDR_QUADLEN(nbytes); \ 118 } while (0) 119 120 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 121 #define READ_BUF(nbytes) do { \ 122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 123 p = argp->p; \ 124 argp->p += XDR_QUADLEN(nbytes); \ 125 } else if (!(p = read_buf(argp, nbytes))) { \ 126 dprintk("NFSD: xdr error (%s:%d)\n", \ 127 __FILE__, __LINE__); \ 128 goto xdr_error; \ 129 } \ 130 } while (0) 131 132 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 133 { 134 /* We want more bytes than seem to be available. 135 * Maybe we need a new page, maybe we have just run out 136 */ 137 unsigned int avail = (char *)argp->end - (char *)argp->p; 138 __be32 *p; 139 if (avail + argp->pagelen < nbytes) 140 return NULL; 141 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 142 return NULL; 143 /* ok, we can do it with the current plus the next page */ 144 if (nbytes <= sizeof(argp->tmp)) 145 p = argp->tmp; 146 else { 147 kfree(argp->tmpp); 148 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 149 if (!p) 150 return NULL; 151 152 } 153 /* 154 * The following memcpy is safe because read_buf is always 155 * called with nbytes > avail, and the two cases above both 156 * guarantee p points to at least nbytes bytes. 157 */ 158 memcpy(p, argp->p, avail); 159 /* step to next page */ 160 argp->p = page_address(argp->pagelist[0]); 161 argp->pagelist++; 162 if (argp->pagelen < PAGE_SIZE) { 163 argp->end = p + (argp->pagelen>>2); 164 argp->pagelen = 0; 165 } else { 166 argp->end = p + (PAGE_SIZE>>2); 167 argp->pagelen -= PAGE_SIZE; 168 } 169 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 170 argp->p += XDR_QUADLEN(nbytes - avail); 171 return p; 172 } 173 174 static int zero_clientid(clientid_t *clid) 175 { 176 return (clid->cl_boot == 0) && (clid->cl_id == 0); 177 } 178 179 static int 180 defer_free(struct nfsd4_compoundargs *argp, 181 void (*release)(const void *), void *p) 182 { 183 struct tmpbuf *tb; 184 185 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 186 if (!tb) 187 return -ENOMEM; 188 tb->buf = p; 189 tb->release = release; 190 tb->next = argp->to_free; 191 argp->to_free = tb; 192 return 0; 193 } 194 195 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 196 { 197 if (p == argp->tmp) { 198 p = kmalloc(nbytes, GFP_KERNEL); 199 if (!p) 200 return NULL; 201 memcpy(p, argp->tmp, nbytes); 202 } else { 203 BUG_ON(p != argp->tmpp); 204 argp->tmpp = NULL; 205 } 206 if (defer_free(argp, kfree, p)) { 207 kfree(p); 208 return NULL; 209 } else 210 return (char *)p; 211 } 212 213 static __be32 214 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 215 { 216 u32 bmlen; 217 DECODE_HEAD; 218 219 bmval[0] = 0; 220 bmval[1] = 0; 221 bmval[2] = 0; 222 223 READ_BUF(4); 224 READ32(bmlen); 225 if (bmlen > 1000) 226 goto xdr_error; 227 228 READ_BUF(bmlen << 2); 229 if (bmlen > 0) 230 READ32(bmval[0]); 231 if (bmlen > 1) 232 READ32(bmval[1]); 233 if (bmlen > 2) 234 READ32(bmval[2]); 235 236 DECODE_TAIL; 237 } 238 239 static __be32 240 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 241 struct iattr *iattr, struct nfs4_acl **acl) 242 { 243 int expected_len, len = 0; 244 u32 dummy32; 245 char *buf; 246 int host_err; 247 248 DECODE_HEAD; 249 iattr->ia_valid = 0; 250 if ((status = nfsd4_decode_bitmap(argp, bmval))) 251 return status; 252 253 READ_BUF(4); 254 READ32(expected_len); 255 256 if (bmval[0] & FATTR4_WORD0_SIZE) { 257 READ_BUF(8); 258 len += 8; 259 READ64(iattr->ia_size); 260 iattr->ia_valid |= ATTR_SIZE; 261 } 262 if (bmval[0] & FATTR4_WORD0_ACL) { 263 int nace; 264 struct nfs4_ace *ace; 265 266 READ_BUF(4); len += 4; 267 READ32(nace); 268 269 if (nace > NFS4_ACL_MAX) 270 return nfserr_resource; 271 272 *acl = nfs4_acl_new(nace); 273 if (*acl == NULL) { 274 host_err = -ENOMEM; 275 goto out_nfserr; 276 } 277 defer_free(argp, kfree, *acl); 278 279 (*acl)->naces = nace; 280 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 281 READ_BUF(16); len += 16; 282 READ32(ace->type); 283 READ32(ace->flag); 284 READ32(ace->access_mask); 285 READ32(dummy32); 286 READ_BUF(dummy32); 287 len += XDR_QUADLEN(dummy32) << 2; 288 READMEM(buf, dummy32); 289 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 290 host_err = 0; 291 if (ace->whotype != NFS4_ACL_WHO_NAMED) 292 ace->who = 0; 293 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 294 host_err = nfsd_map_name_to_gid(argp->rqstp, 295 buf, dummy32, &ace->who); 296 else 297 host_err = nfsd_map_name_to_uid(argp->rqstp, 298 buf, dummy32, &ace->who); 299 if (host_err) 300 goto out_nfserr; 301 } 302 } else 303 *acl = NULL; 304 if (bmval[1] & FATTR4_WORD1_MODE) { 305 READ_BUF(4); 306 len += 4; 307 READ32(iattr->ia_mode); 308 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 309 iattr->ia_valid |= ATTR_MODE; 310 } 311 if (bmval[1] & FATTR4_WORD1_OWNER) { 312 READ_BUF(4); 313 len += 4; 314 READ32(dummy32); 315 READ_BUF(dummy32); 316 len += (XDR_QUADLEN(dummy32) << 2); 317 READMEM(buf, dummy32); 318 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 319 goto out_nfserr; 320 iattr->ia_valid |= ATTR_UID; 321 } 322 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 323 READ_BUF(4); 324 len += 4; 325 READ32(dummy32); 326 READ_BUF(dummy32); 327 len += (XDR_QUADLEN(dummy32) << 2); 328 READMEM(buf, dummy32); 329 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 330 goto out_nfserr; 331 iattr->ia_valid |= ATTR_GID; 332 } 333 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 334 READ_BUF(4); 335 len += 4; 336 READ32(dummy32); 337 switch (dummy32) { 338 case NFS4_SET_TO_CLIENT_TIME: 339 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 340 all 32 bits of 'nseconds'. */ 341 READ_BUF(12); 342 len += 12; 343 READ32(dummy32); 344 if (dummy32) 345 return nfserr_inval; 346 READ32(iattr->ia_atime.tv_sec); 347 READ32(iattr->ia_atime.tv_nsec); 348 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 349 return nfserr_inval; 350 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 351 break; 352 case NFS4_SET_TO_SERVER_TIME: 353 iattr->ia_valid |= ATTR_ATIME; 354 break; 355 default: 356 goto xdr_error; 357 } 358 } 359 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 360 READ_BUF(4); 361 len += 4; 362 READ32(dummy32); 363 switch (dummy32) { 364 case NFS4_SET_TO_CLIENT_TIME: 365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 366 all 32 bits of 'nseconds'. */ 367 READ_BUF(12); 368 len += 12; 369 READ32(dummy32); 370 if (dummy32) 371 return nfserr_inval; 372 READ32(iattr->ia_mtime.tv_sec); 373 READ32(iattr->ia_mtime.tv_nsec); 374 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 375 return nfserr_inval; 376 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 377 break; 378 case NFS4_SET_TO_SERVER_TIME: 379 iattr->ia_valid |= ATTR_MTIME; 380 break; 381 default: 382 goto xdr_error; 383 } 384 } 385 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 386 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 387 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 388 READ_BUF(expected_len - len); 389 else if (len != expected_len) 390 goto xdr_error; 391 392 DECODE_TAIL; 393 394 out_nfserr: 395 status = nfserrno(host_err); 396 goto out; 397 } 398 399 static __be32 400 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 401 { 402 DECODE_HEAD; 403 404 READ_BUF(sizeof(stateid_t)); 405 READ32(sid->si_generation); 406 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 407 408 DECODE_TAIL; 409 } 410 411 static __be32 412 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 413 { 414 DECODE_HEAD; 415 416 READ_BUF(4); 417 READ32(access->ac_req_access); 418 419 DECODE_TAIL; 420 } 421 422 static __be32 423 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 424 { 425 DECODE_HEAD; 426 427 close->cl_stateowner = NULL; 428 READ_BUF(4); 429 READ32(close->cl_seqid); 430 return nfsd4_decode_stateid(argp, &close->cl_stateid); 431 432 DECODE_TAIL; 433 } 434 435 436 static __be32 437 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 438 { 439 DECODE_HEAD; 440 441 READ_BUF(12); 442 READ64(commit->co_offset); 443 READ32(commit->co_count); 444 445 DECODE_TAIL; 446 } 447 448 static __be32 449 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 450 { 451 DECODE_HEAD; 452 453 READ_BUF(4); 454 READ32(create->cr_type); 455 switch (create->cr_type) { 456 case NF4LNK: 457 READ_BUF(4); 458 READ32(create->cr_linklen); 459 READ_BUF(create->cr_linklen); 460 SAVEMEM(create->cr_linkname, create->cr_linklen); 461 break; 462 case NF4BLK: 463 case NF4CHR: 464 READ_BUF(8); 465 READ32(create->cr_specdata1); 466 READ32(create->cr_specdata2); 467 break; 468 case NF4SOCK: 469 case NF4FIFO: 470 case NF4DIR: 471 default: 472 break; 473 } 474 475 READ_BUF(4); 476 READ32(create->cr_namelen); 477 READ_BUF(create->cr_namelen); 478 SAVEMEM(create->cr_name, create->cr_namelen); 479 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 480 return status; 481 482 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 483 &create->cr_acl); 484 if (status) 485 goto out; 486 487 DECODE_TAIL; 488 } 489 490 static inline __be32 491 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 492 { 493 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 494 } 495 496 static inline __be32 497 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 498 { 499 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 500 } 501 502 static __be32 503 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 504 { 505 DECODE_HEAD; 506 507 READ_BUF(4); 508 READ32(link->li_namelen); 509 READ_BUF(link->li_namelen); 510 SAVEMEM(link->li_name, link->li_namelen); 511 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 512 return status; 513 514 DECODE_TAIL; 515 } 516 517 static __be32 518 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 519 { 520 DECODE_HEAD; 521 522 lock->lk_replay_owner = NULL; 523 /* 524 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 525 */ 526 READ_BUF(28); 527 READ32(lock->lk_type); 528 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 529 goto xdr_error; 530 READ32(lock->lk_reclaim); 531 READ64(lock->lk_offset); 532 READ64(lock->lk_length); 533 READ32(lock->lk_is_new); 534 535 if (lock->lk_is_new) { 536 READ_BUF(4); 537 READ32(lock->lk_new_open_seqid); 538 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 539 if (status) 540 return status; 541 READ_BUF(8 + sizeof(clientid_t)); 542 READ32(lock->lk_new_lock_seqid); 543 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 544 READ32(lock->lk_new_owner.len); 545 READ_BUF(lock->lk_new_owner.len); 546 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 547 } else { 548 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 549 if (status) 550 return status; 551 READ_BUF(4); 552 READ32(lock->lk_old_lock_seqid); 553 } 554 555 DECODE_TAIL; 556 } 557 558 static __be32 559 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 560 { 561 DECODE_HEAD; 562 563 READ_BUF(32); 564 READ32(lockt->lt_type); 565 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 566 goto xdr_error; 567 READ64(lockt->lt_offset); 568 READ64(lockt->lt_length); 569 COPYMEM(&lockt->lt_clientid, 8); 570 READ32(lockt->lt_owner.len); 571 READ_BUF(lockt->lt_owner.len); 572 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 573 574 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid)) 575 return nfserr_inval; 576 DECODE_TAIL; 577 } 578 579 static __be32 580 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 581 { 582 DECODE_HEAD; 583 584 locku->lu_stateowner = NULL; 585 READ_BUF(8); 586 READ32(locku->lu_type); 587 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 588 goto xdr_error; 589 READ32(locku->lu_seqid); 590 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 591 if (status) 592 return status; 593 READ_BUF(16); 594 READ64(locku->lu_offset); 595 READ64(locku->lu_length); 596 597 DECODE_TAIL; 598 } 599 600 static __be32 601 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 602 { 603 DECODE_HEAD; 604 605 READ_BUF(4); 606 READ32(lookup->lo_len); 607 READ_BUF(lookup->lo_len); 608 SAVEMEM(lookup->lo_name, lookup->lo_len); 609 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 610 return status; 611 612 DECODE_TAIL; 613 } 614 615 static __be32 616 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 617 { 618 DECODE_HEAD; 619 620 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 621 open->op_iattr.ia_valid = 0; 622 open->op_stateowner = NULL; 623 624 /* seqid, share_access, share_deny, clientid, ownerlen */ 625 READ_BUF(16 + sizeof(clientid_t)); 626 READ32(open->op_seqid); 627 READ32(open->op_share_access); 628 READ32(open->op_share_deny); 629 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 630 READ32(open->op_owner.len); 631 632 /* owner, open_flag */ 633 READ_BUF(open->op_owner.len + 4); 634 SAVEMEM(open->op_owner.data, open->op_owner.len); 635 READ32(open->op_create); 636 switch (open->op_create) { 637 case NFS4_OPEN_NOCREATE: 638 break; 639 case NFS4_OPEN_CREATE: 640 READ_BUF(4); 641 READ32(open->op_createmode); 642 switch (open->op_createmode) { 643 case NFS4_CREATE_UNCHECKED: 644 case NFS4_CREATE_GUARDED: 645 status = nfsd4_decode_fattr(argp, open->op_bmval, 646 &open->op_iattr, &open->op_acl); 647 if (status) 648 goto out; 649 break; 650 case NFS4_CREATE_EXCLUSIVE: 651 READ_BUF(8); 652 COPYMEM(open->op_verf.data, 8); 653 break; 654 case NFS4_CREATE_EXCLUSIVE4_1: 655 if (argp->minorversion < 1) 656 goto xdr_error; 657 READ_BUF(8); 658 COPYMEM(open->op_verf.data, 8); 659 status = nfsd4_decode_fattr(argp, open->op_bmval, 660 &open->op_iattr, &open->op_acl); 661 if (status) 662 goto out; 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 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 691 if (status) 692 return status; 693 READ_BUF(4); 694 READ32(open->op_fname.len); 695 READ_BUF(open->op_fname.len); 696 SAVEMEM(open->op_fname.data, open->op_fname.len); 697 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 698 return status; 699 break; 700 default: 701 goto xdr_error; 702 } 703 704 DECODE_TAIL; 705 } 706 707 static __be32 708 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 709 { 710 DECODE_HEAD; 711 712 open_conf->oc_stateowner = NULL; 713 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 714 if (status) 715 return status; 716 READ_BUF(4); 717 READ32(open_conf->oc_seqid); 718 719 DECODE_TAIL; 720 } 721 722 static __be32 723 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 724 { 725 DECODE_HEAD; 726 727 open_down->od_stateowner = NULL; 728 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 729 if (status) 730 return status; 731 READ_BUF(12); 732 READ32(open_down->od_seqid); 733 READ32(open_down->od_share_access); 734 READ32(open_down->od_share_deny); 735 736 DECODE_TAIL; 737 } 738 739 static __be32 740 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 741 { 742 DECODE_HEAD; 743 744 READ_BUF(4); 745 READ32(putfh->pf_fhlen); 746 if (putfh->pf_fhlen > NFS4_FHSIZE) 747 goto xdr_error; 748 READ_BUF(putfh->pf_fhlen); 749 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 750 751 DECODE_TAIL; 752 } 753 754 static __be32 755 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 756 { 757 DECODE_HEAD; 758 759 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 760 if (status) 761 return status; 762 READ_BUF(12); 763 READ64(read->rd_offset); 764 READ32(read->rd_length); 765 766 DECODE_TAIL; 767 } 768 769 static __be32 770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 771 { 772 DECODE_HEAD; 773 774 READ_BUF(24); 775 READ64(readdir->rd_cookie); 776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 778 READ32(readdir->rd_maxcount); 779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 780 goto out; 781 782 DECODE_TAIL; 783 } 784 785 static __be32 786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 787 { 788 DECODE_HEAD; 789 790 READ_BUF(4); 791 READ32(remove->rm_namelen); 792 READ_BUF(remove->rm_namelen); 793 SAVEMEM(remove->rm_name, remove->rm_namelen); 794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 795 return status; 796 797 DECODE_TAIL; 798 } 799 800 static __be32 801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 802 { 803 DECODE_HEAD; 804 805 READ_BUF(4); 806 READ32(rename->rn_snamelen); 807 READ_BUF(rename->rn_snamelen + 4); 808 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 809 READ32(rename->rn_tnamelen); 810 READ_BUF(rename->rn_tnamelen); 811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 813 return status; 814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 815 return status; 816 817 DECODE_TAIL; 818 } 819 820 static __be32 821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 822 { 823 DECODE_HEAD; 824 825 READ_BUF(sizeof(clientid_t)); 826 COPYMEM(clientid, sizeof(clientid_t)); 827 828 DECODE_TAIL; 829 } 830 831 static __be32 832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 833 struct nfsd4_secinfo *secinfo) 834 { 835 DECODE_HEAD; 836 837 READ_BUF(4); 838 READ32(secinfo->si_namelen); 839 READ_BUF(secinfo->si_namelen); 840 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 841 status = check_filename(secinfo->si_name, secinfo->si_namelen, 842 nfserr_noent); 843 if (status) 844 return status; 845 DECODE_TAIL; 846 } 847 848 static __be32 849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 850 { 851 __be32 status; 852 853 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 854 if (status) 855 return status; 856 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 857 &setattr->sa_acl); 858 } 859 860 static __be32 861 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 862 { 863 DECODE_HEAD; 864 865 READ_BUF(12); 866 COPYMEM(setclientid->se_verf.data, 8); 867 READ32(setclientid->se_namelen); 868 869 READ_BUF(setclientid->se_namelen + 8); 870 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 871 READ32(setclientid->se_callback_prog); 872 READ32(setclientid->se_callback_netid_len); 873 874 READ_BUF(setclientid->se_callback_netid_len + 4); 875 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 876 READ32(setclientid->se_callback_addr_len); 877 878 READ_BUF(setclientid->se_callback_addr_len + 4); 879 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 880 READ32(setclientid->se_callback_ident); 881 882 DECODE_TAIL; 883 } 884 885 static __be32 886 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 887 { 888 DECODE_HEAD; 889 890 READ_BUF(8 + sizeof(nfs4_verifier)); 891 COPYMEM(&scd_c->sc_clientid, 8); 892 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 893 894 DECODE_TAIL; 895 } 896 897 /* Also used for NVERIFY */ 898 static __be32 899 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 900 { 901 #if 0 902 struct nfsd4_compoundargs save = { 903 .p = argp->p, 904 .end = argp->end, 905 .rqstp = argp->rqstp, 906 }; 907 u32 ve_bmval[2]; 908 struct iattr ve_iattr; /* request */ 909 struct nfs4_acl *ve_acl; /* request */ 910 #endif 911 DECODE_HEAD; 912 913 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 914 goto out; 915 916 /* For convenience's sake, we compare raw xdr'd attributes in 917 * nfsd4_proc_verify; however we still decode here just to return 918 * correct error in case of bad xdr. */ 919 #if 0 920 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 921 if (status == nfserr_inval) { 922 status = nfserrno(status); 923 goto out; 924 } 925 #endif 926 READ_BUF(4); 927 READ32(verify->ve_attrlen); 928 READ_BUF(verify->ve_attrlen); 929 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 930 931 DECODE_TAIL; 932 } 933 934 static __be32 935 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 936 { 937 int avail; 938 int v; 939 int len; 940 DECODE_HEAD; 941 942 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 943 if (status) 944 return status; 945 READ_BUF(16); 946 READ64(write->wr_offset); 947 READ32(write->wr_stable_how); 948 if (write->wr_stable_how > 2) 949 goto xdr_error; 950 READ32(write->wr_buflen); 951 952 /* Sorry .. no magic macros for this.. * 953 * READ_BUF(write->wr_buflen); 954 * SAVEMEM(write->wr_buf, write->wr_buflen); 955 */ 956 avail = (char*)argp->end - (char*)argp->p; 957 if (avail + argp->pagelen < write->wr_buflen) { 958 dprintk("NFSD: xdr error (%s:%d)\n", 959 __FILE__, __LINE__); 960 goto xdr_error; 961 } 962 argp->rqstp->rq_vec[0].iov_base = p; 963 argp->rqstp->rq_vec[0].iov_len = avail; 964 v = 0; 965 len = write->wr_buflen; 966 while (len > argp->rqstp->rq_vec[v].iov_len) { 967 len -= argp->rqstp->rq_vec[v].iov_len; 968 v++; 969 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 970 argp->pagelist++; 971 if (argp->pagelen >= PAGE_SIZE) { 972 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 973 argp->pagelen -= PAGE_SIZE; 974 } else { 975 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 976 argp->pagelen -= len; 977 } 978 } 979 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 980 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 981 argp->rqstp->rq_vec[v].iov_len = len; 982 write->wr_vlen = v+1; 983 984 DECODE_TAIL; 985 } 986 987 static __be32 988 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 989 { 990 DECODE_HEAD; 991 992 READ_BUF(12); 993 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 994 READ32(rlockowner->rl_owner.len); 995 READ_BUF(rlockowner->rl_owner.len); 996 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 997 998 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 999 return nfserr_inval; 1000 DECODE_TAIL; 1001 } 1002 1003 static __be32 1004 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1005 struct nfsd4_exchange_id *exid) 1006 { 1007 int dummy; 1008 DECODE_HEAD; 1009 1010 READ_BUF(NFS4_VERIFIER_SIZE); 1011 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1012 1013 READ_BUF(4); 1014 READ32(exid->clname.len); 1015 1016 READ_BUF(exid->clname.len); 1017 SAVEMEM(exid->clname.data, exid->clname.len); 1018 1019 READ_BUF(4); 1020 READ32(exid->flags); 1021 1022 /* Ignore state_protect4_a */ 1023 READ_BUF(4); 1024 READ32(exid->spa_how); 1025 switch (exid->spa_how) { 1026 case SP4_NONE: 1027 break; 1028 case SP4_MACH_CRED: 1029 /* spo_must_enforce */ 1030 READ_BUF(4); 1031 READ32(dummy); 1032 READ_BUF(dummy * 4); 1033 p += dummy; 1034 1035 /* spo_must_allow */ 1036 READ_BUF(4); 1037 READ32(dummy); 1038 READ_BUF(dummy * 4); 1039 p += dummy; 1040 break; 1041 case SP4_SSV: 1042 /* ssp_ops */ 1043 READ_BUF(4); 1044 READ32(dummy); 1045 READ_BUF(dummy * 4); 1046 p += dummy; 1047 1048 READ_BUF(4); 1049 READ32(dummy); 1050 READ_BUF(dummy * 4); 1051 p += dummy; 1052 1053 /* ssp_hash_algs<> */ 1054 READ_BUF(4); 1055 READ32(dummy); 1056 READ_BUF(dummy); 1057 p += XDR_QUADLEN(dummy); 1058 1059 /* ssp_encr_algs<> */ 1060 READ_BUF(4); 1061 READ32(dummy); 1062 READ_BUF(dummy); 1063 p += XDR_QUADLEN(dummy); 1064 1065 /* ssp_window and ssp_num_gss_handles */ 1066 READ_BUF(8); 1067 READ32(dummy); 1068 READ32(dummy); 1069 break; 1070 default: 1071 goto xdr_error; 1072 } 1073 1074 /* Ignore Implementation ID */ 1075 READ_BUF(4); /* nfs_impl_id4 array length */ 1076 READ32(dummy); 1077 1078 if (dummy > 1) 1079 goto xdr_error; 1080 1081 if (dummy == 1) { 1082 /* nii_domain */ 1083 READ_BUF(4); 1084 READ32(dummy); 1085 READ_BUF(dummy); 1086 p += XDR_QUADLEN(dummy); 1087 1088 /* nii_name */ 1089 READ_BUF(4); 1090 READ32(dummy); 1091 READ_BUF(dummy); 1092 p += XDR_QUADLEN(dummy); 1093 1094 /* nii_date */ 1095 READ_BUF(12); 1096 p += 3; 1097 } 1098 DECODE_TAIL; 1099 } 1100 1101 static __be32 1102 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1103 struct nfsd4_create_session *sess) 1104 { 1105 DECODE_HEAD; 1106 1107 u32 dummy; 1108 char *machine_name; 1109 int i; 1110 int nr_secflavs; 1111 1112 READ_BUF(16); 1113 COPYMEM(&sess->clientid, 8); 1114 READ32(sess->seqid); 1115 READ32(sess->flags); 1116 1117 /* Fore channel attrs */ 1118 READ_BUF(28); 1119 READ32(dummy); /* headerpadsz is always 0 */ 1120 READ32(sess->fore_channel.maxreq_sz); 1121 READ32(sess->fore_channel.maxresp_sz); 1122 READ32(sess->fore_channel.maxresp_cached); 1123 READ32(sess->fore_channel.maxops); 1124 READ32(sess->fore_channel.maxreqs); 1125 READ32(sess->fore_channel.nr_rdma_attrs); 1126 if (sess->fore_channel.nr_rdma_attrs == 1) { 1127 READ_BUF(4); 1128 READ32(sess->fore_channel.rdma_attrs); 1129 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1130 dprintk("Too many fore channel attr bitmaps!\n"); 1131 goto xdr_error; 1132 } 1133 1134 /* Back channel attrs */ 1135 READ_BUF(28); 1136 READ32(dummy); /* headerpadsz is always 0 */ 1137 READ32(sess->back_channel.maxreq_sz); 1138 READ32(sess->back_channel.maxresp_sz); 1139 READ32(sess->back_channel.maxresp_cached); 1140 READ32(sess->back_channel.maxops); 1141 READ32(sess->back_channel.maxreqs); 1142 READ32(sess->back_channel.nr_rdma_attrs); 1143 if (sess->back_channel.nr_rdma_attrs == 1) { 1144 READ_BUF(4); 1145 READ32(sess->back_channel.rdma_attrs); 1146 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1147 dprintk("Too many back channel attr bitmaps!\n"); 1148 goto xdr_error; 1149 } 1150 1151 READ_BUF(8); 1152 READ32(sess->callback_prog); 1153 1154 /* callback_sec_params4 */ 1155 READ32(nr_secflavs); 1156 for (i = 0; i < nr_secflavs; ++i) { 1157 READ_BUF(4); 1158 READ32(dummy); 1159 switch (dummy) { 1160 case RPC_AUTH_NULL: 1161 /* Nothing to read */ 1162 break; 1163 case RPC_AUTH_UNIX: 1164 READ_BUF(8); 1165 /* stamp */ 1166 READ32(dummy); 1167 1168 /* machine name */ 1169 READ32(dummy); 1170 READ_BUF(dummy); 1171 SAVEMEM(machine_name, dummy); 1172 1173 /* uid, gid */ 1174 READ_BUF(8); 1175 READ32(sess->uid); 1176 READ32(sess->gid); 1177 1178 /* more gids */ 1179 READ_BUF(4); 1180 READ32(dummy); 1181 READ_BUF(dummy * 4); 1182 for (i = 0; i < dummy; ++i) 1183 READ32(dummy); 1184 break; 1185 case RPC_AUTH_GSS: 1186 dprintk("RPC_AUTH_GSS callback secflavor " 1187 "not supported!\n"); 1188 READ_BUF(8); 1189 /* gcbp_service */ 1190 READ32(dummy); 1191 /* gcbp_handle_from_server */ 1192 READ32(dummy); 1193 READ_BUF(dummy); 1194 p += XDR_QUADLEN(dummy); 1195 /* gcbp_handle_from_client */ 1196 READ_BUF(4); 1197 READ32(dummy); 1198 READ_BUF(dummy); 1199 p += XDR_QUADLEN(dummy); 1200 break; 1201 default: 1202 dprintk("Illegal callback secflavor\n"); 1203 return nfserr_inval; 1204 } 1205 } 1206 DECODE_TAIL; 1207 } 1208 1209 static __be32 1210 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1211 struct nfsd4_destroy_session *destroy_session) 1212 { 1213 DECODE_HEAD; 1214 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1215 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1216 1217 DECODE_TAIL; 1218 } 1219 1220 static __be32 1221 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1222 struct nfsd4_sequence *seq) 1223 { 1224 DECODE_HEAD; 1225 1226 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1227 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1228 READ32(seq->seqid); 1229 READ32(seq->slotid); 1230 READ32(seq->maxslots); 1231 READ32(seq->cachethis); 1232 1233 DECODE_TAIL; 1234 } 1235 1236 static __be32 1237 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1238 { 1239 return nfs_ok; 1240 } 1241 1242 static __be32 1243 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1244 { 1245 return nfserr_notsupp; 1246 } 1247 1248 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1249 1250 static nfsd4_dec nfsd4_dec_ops[] = { 1251 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1252 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1253 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1254 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1255 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1256 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1257 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1258 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1259 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1260 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1261 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1262 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1263 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1264 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1265 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1266 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1267 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1268 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1269 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1270 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1271 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1272 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1273 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1274 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1275 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1276 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1277 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1278 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1279 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1280 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1281 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1282 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1283 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1284 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1285 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1286 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1287 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1288 }; 1289 1290 static nfsd4_dec nfsd41_dec_ops[] = { 1291 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1292 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1293 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1294 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1295 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1296 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1297 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1298 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1299 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1300 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1301 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1302 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1303 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1304 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1305 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1306 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1307 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1308 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1309 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1310 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1311 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1312 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1313 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1314 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1315 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1316 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1317 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1318 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1319 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1320 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1321 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1322 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1323 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1324 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1325 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1326 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1327 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1328 1329 /* new operations for NFSv4.1 */ 1330 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1331 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp, 1332 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1333 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1334 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1335 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1336 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1337 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1338 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1339 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1340 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1341 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1342 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1343 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1344 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1345 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1346 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1347 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1348 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp, 1349 }; 1350 1351 struct nfsd4_minorversion_ops { 1352 nfsd4_dec *decoders; 1353 int nops; 1354 }; 1355 1356 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1357 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1358 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1359 }; 1360 1361 static __be32 1362 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1363 { 1364 DECODE_HEAD; 1365 struct nfsd4_op *op; 1366 struct nfsd4_minorversion_ops *ops; 1367 int i; 1368 1369 /* 1370 * XXX: According to spec, we should check the tag 1371 * for UTF-8 compliance. I'm postponing this for 1372 * now because it seems that some clients do use 1373 * binary tags. 1374 */ 1375 READ_BUF(4); 1376 READ32(argp->taglen); 1377 READ_BUF(argp->taglen + 8); 1378 SAVEMEM(argp->tag, argp->taglen); 1379 READ32(argp->minorversion); 1380 READ32(argp->opcnt); 1381 1382 if (argp->taglen > NFSD4_MAX_TAGLEN) 1383 goto xdr_error; 1384 if (argp->opcnt > 100) 1385 goto xdr_error; 1386 1387 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1388 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1389 if (!argp->ops) { 1390 argp->ops = argp->iops; 1391 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1392 goto xdr_error; 1393 } 1394 } 1395 1396 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1397 argp->opcnt = 0; 1398 1399 ops = &nfsd4_minorversion[argp->minorversion]; 1400 for (i = 0; i < argp->opcnt; i++) { 1401 op = &argp->ops[i]; 1402 op->replay = NULL; 1403 1404 /* 1405 * We can't use READ_BUF() here because we need to handle 1406 * a missing opcode as an OP_WRITE + 1. So we need to check 1407 * to see if we're truly at the end of our buffer or if there 1408 * is another page we need to flip to. 1409 */ 1410 1411 if (argp->p == argp->end) { 1412 if (argp->pagelen < 4) { 1413 /* There isn't an opcode still on the wire */ 1414 op->opnum = OP_WRITE + 1; 1415 op->status = nfserr_bad_xdr; 1416 argp->opcnt = i+1; 1417 break; 1418 } 1419 1420 /* 1421 * False alarm. We just hit a page boundary, but there 1422 * is still data available. Move pointer across page 1423 * boundary. *snip from READ_BUF* 1424 */ 1425 argp->p = page_address(argp->pagelist[0]); 1426 argp->pagelist++; 1427 if (argp->pagelen < PAGE_SIZE) { 1428 argp->end = p + (argp->pagelen>>2); 1429 argp->pagelen = 0; 1430 } else { 1431 argp->end = p + (PAGE_SIZE>>2); 1432 argp->pagelen -= PAGE_SIZE; 1433 } 1434 } 1435 op->opnum = ntohl(*argp->p++); 1436 1437 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops) 1438 op->status = ops->decoders[op->opnum](argp, &op->u); 1439 else { 1440 op->opnum = OP_ILLEGAL; 1441 op->status = nfserr_op_illegal; 1442 } 1443 1444 if (op->status) { 1445 argp->opcnt = i+1; 1446 break; 1447 } 1448 } 1449 1450 DECODE_TAIL; 1451 } 1452 1453 #define WRITE32(n) *p++ = htonl(n) 1454 #define WRITE64(n) do { \ 1455 *p++ = htonl((u32)((n) >> 32)); \ 1456 *p++ = htonl((u32)(n)); \ 1457 } while (0) 1458 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1459 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1460 memcpy(p, ptr, nbytes); \ 1461 p += XDR_QUADLEN(nbytes); \ 1462 }} while (0) 1463 1464 static void write32(__be32 **p, u32 n) 1465 { 1466 *(*p)++ = n; 1467 } 1468 1469 static void write64(__be32 **p, u64 n) 1470 { 1471 write32(p, (u32)(n >> 32)); 1472 write32(p, (u32)n); 1473 } 1474 1475 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1476 { 1477 if (IS_I_VERSION(inode)) { 1478 write64(p, inode->i_version); 1479 } else { 1480 write32(p, stat->ctime.tv_sec); 1481 write32(p, stat->ctime.tv_nsec); 1482 } 1483 } 1484 1485 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1486 { 1487 write32(p, c->atomic); 1488 if (c->change_supported) { 1489 write64(p, c->before_change); 1490 write64(p, c->after_change); 1491 } else { 1492 write32(p, c->before_ctime_sec); 1493 write32(p, c->before_ctime_nsec); 1494 write32(p, c->after_ctime_sec); 1495 write32(p, c->after_ctime_nsec); 1496 } 1497 } 1498 1499 #define RESERVE_SPACE(nbytes) do { \ 1500 p = resp->p; \ 1501 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1502 } while (0) 1503 #define ADJUST_ARGS() resp->p = p 1504 1505 /* 1506 * Header routine to setup seqid operation replay cache 1507 */ 1508 #define ENCODE_SEQID_OP_HEAD \ 1509 __be32 *save; \ 1510 \ 1511 save = resp->p; 1512 1513 /* 1514 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1515 * is where sequence id's are incremented, and the replay cache is filled. 1516 * Note that we increment sequence id's here, at the last moment, so we're sure 1517 * we know whether the error to be returned is a sequence id mutating error. 1518 */ 1519 1520 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1521 if (seqid_mutating_err(nfserr) && stateowner) { \ 1522 stateowner->so_seqid++; \ 1523 stateowner->so_replay.rp_status = nfserr; \ 1524 stateowner->so_replay.rp_buflen = \ 1525 (((char *)(resp)->p - (char *)save)); \ 1526 memcpy(stateowner->so_replay.rp_buf, save, \ 1527 stateowner->so_replay.rp_buflen); \ 1528 } } while (0); 1529 1530 /* Encode as an array of strings the string given with components 1531 * seperated @sep. 1532 */ 1533 static __be32 nfsd4_encode_components(char sep, char *components, 1534 __be32 **pp, int *buflen) 1535 { 1536 __be32 *p = *pp; 1537 __be32 *countp = p; 1538 int strlen, count=0; 1539 char *str, *end; 1540 1541 dprintk("nfsd4_encode_components(%s)\n", components); 1542 if ((*buflen -= 4) < 0) 1543 return nfserr_resource; 1544 WRITE32(0); /* We will fill this in with @count later */ 1545 end = str = components; 1546 while (*end) { 1547 for (; *end && (*end != sep); end++) 1548 ; /* Point to end of component */ 1549 strlen = end - str; 1550 if (strlen) { 1551 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1552 return nfserr_resource; 1553 WRITE32(strlen); 1554 WRITEMEM(str, strlen); 1555 count++; 1556 } 1557 else 1558 end++; 1559 str = end; 1560 } 1561 *pp = p; 1562 p = countp; 1563 WRITE32(count); 1564 return 0; 1565 } 1566 1567 /* 1568 * encode a location element of a fs_locations structure 1569 */ 1570 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1571 __be32 **pp, int *buflen) 1572 { 1573 __be32 status; 1574 __be32 *p = *pp; 1575 1576 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1577 if (status) 1578 return status; 1579 status = nfsd4_encode_components('/', location->path, &p, buflen); 1580 if (status) 1581 return status; 1582 *pp = p; 1583 return 0; 1584 } 1585 1586 /* 1587 * Return the path to an export point in the pseudo filesystem namespace 1588 * Returned string is safe to use as long as the caller holds a reference 1589 * to @exp. 1590 */ 1591 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1592 { 1593 struct svc_fh tmp_fh; 1594 char *path = NULL, *rootpath; 1595 size_t rootlen; 1596 1597 fh_init(&tmp_fh, NFS4_FHSIZE); 1598 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1599 if (*stat) 1600 return NULL; 1601 rootpath = tmp_fh.fh_export->ex_pathname; 1602 1603 path = exp->ex_pathname; 1604 1605 rootlen = strlen(rootpath); 1606 if (strncmp(path, rootpath, rootlen)) { 1607 dprintk("nfsd: fs_locations failed;" 1608 "%s is not contained in %s\n", path, rootpath); 1609 *stat = nfserr_notsupp; 1610 path = NULL; 1611 goto out; 1612 } 1613 path += rootlen; 1614 out: 1615 fh_put(&tmp_fh); 1616 return path; 1617 } 1618 1619 /* 1620 * encode a fs_locations structure 1621 */ 1622 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1623 struct svc_export *exp, 1624 __be32 **pp, int *buflen) 1625 { 1626 __be32 status; 1627 int i; 1628 __be32 *p = *pp; 1629 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1630 char *root = nfsd4_path(rqstp, exp, &status); 1631 1632 if (status) 1633 return status; 1634 status = nfsd4_encode_components('/', root, &p, buflen); 1635 if (status) 1636 return status; 1637 if ((*buflen -= 4) < 0) 1638 return nfserr_resource; 1639 WRITE32(fslocs->locations_count); 1640 for (i=0; i<fslocs->locations_count; i++) { 1641 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1642 &p, buflen); 1643 if (status) 1644 return status; 1645 } 1646 *pp = p; 1647 return 0; 1648 } 1649 1650 static u32 nfs4_ftypes[16] = { 1651 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1652 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1653 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1654 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1655 }; 1656 1657 static __be32 1658 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1659 __be32 **p, int *buflen) 1660 { 1661 int status; 1662 1663 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1664 return nfserr_resource; 1665 if (whotype != NFS4_ACL_WHO_NAMED) 1666 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1667 else if (group) 1668 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1669 else 1670 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1671 if (status < 0) 1672 return nfserrno(status); 1673 *p = xdr_encode_opaque(*p, NULL, status); 1674 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1675 BUG_ON(*buflen < 0); 1676 return 0; 1677 } 1678 1679 static inline __be32 1680 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1681 { 1682 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1683 } 1684 1685 static inline __be32 1686 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1687 { 1688 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1689 } 1690 1691 static inline __be32 1692 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1693 __be32 **p, int *buflen) 1694 { 1695 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1696 } 1697 1698 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1699 FATTR4_WORD0_RDATTR_ERROR) 1700 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1701 1702 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1703 { 1704 /* As per referral draft: */ 1705 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1706 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1707 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1708 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1709 *rdattr_err = NFSERR_MOVED; 1710 else 1711 return nfserr_moved; 1712 } 1713 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1714 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1715 return 0; 1716 } 1717 1718 /* 1719 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1720 * ourselves. 1721 * 1722 * @countp is the buffer size in _words_; upon successful return this becomes 1723 * replaced with the number of words written. 1724 */ 1725 __be32 1726 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1727 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1728 struct svc_rqst *rqstp, int ignore_crossmnt) 1729 { 1730 u32 bmval0 = bmval[0]; 1731 u32 bmval1 = bmval[1]; 1732 u32 bmval2 = bmval[2]; 1733 struct kstat stat; 1734 struct svc_fh tempfh; 1735 struct kstatfs statfs; 1736 int buflen = *countp << 2; 1737 __be32 *attrlenp; 1738 u32 dummy; 1739 u64 dummy64; 1740 u32 rdattr_err = 0; 1741 __be32 *p = buffer; 1742 __be32 status; 1743 int err; 1744 int aclsupport = 0; 1745 struct nfs4_acl *acl = NULL; 1746 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1747 u32 minorversion = resp->cstate.minorversion; 1748 1749 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1750 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 1751 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 1752 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 1753 1754 if (exp->ex_fslocs.migrated) { 1755 BUG_ON(bmval[2]); 1756 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1757 if (status) 1758 goto out; 1759 } 1760 1761 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1762 if (err) 1763 goto out_nfserr; 1764 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1765 FATTR4_WORD0_MAXNAME)) || 1766 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1767 FATTR4_WORD1_SPACE_TOTAL))) { 1768 err = vfs_statfs(dentry, &statfs); 1769 if (err) 1770 goto out_nfserr; 1771 } 1772 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1773 fh_init(&tempfh, NFS4_FHSIZE); 1774 status = fh_compose(&tempfh, exp, dentry, NULL); 1775 if (status) 1776 goto out; 1777 fhp = &tempfh; 1778 } 1779 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1780 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1781 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1782 aclsupport = (err == 0); 1783 if (bmval0 & FATTR4_WORD0_ACL) { 1784 if (err == -EOPNOTSUPP) 1785 bmval0 &= ~FATTR4_WORD0_ACL; 1786 else if (err == -EINVAL) { 1787 status = nfserr_attrnotsupp; 1788 goto out; 1789 } else if (err != 0) 1790 goto out_nfserr; 1791 } 1792 } 1793 if ((buflen -= 16) < 0) 1794 goto out_resource; 1795 1796 if (unlikely(bmval2)) { 1797 WRITE32(3); 1798 WRITE32(bmval0); 1799 WRITE32(bmval1); 1800 WRITE32(bmval2); 1801 } else if (likely(bmval1)) { 1802 WRITE32(2); 1803 WRITE32(bmval0); 1804 WRITE32(bmval1); 1805 } else { 1806 WRITE32(1); 1807 WRITE32(bmval0); 1808 } 1809 attrlenp = p++; /* to be backfilled later */ 1810 1811 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1812 u32 word0 = nfsd_suppattrs0(minorversion); 1813 u32 word1 = nfsd_suppattrs1(minorversion); 1814 u32 word2 = nfsd_suppattrs2(minorversion); 1815 1816 if ((buflen -= 12) < 0) 1817 goto out_resource; 1818 if (!aclsupport) 1819 word0 &= ~FATTR4_WORD0_ACL; 1820 if (!word2) { 1821 WRITE32(2); 1822 WRITE32(word0); 1823 WRITE32(word1); 1824 } else { 1825 WRITE32(3); 1826 WRITE32(word0); 1827 WRITE32(word1); 1828 WRITE32(word2); 1829 } 1830 } 1831 if (bmval0 & FATTR4_WORD0_TYPE) { 1832 if ((buflen -= 4) < 0) 1833 goto out_resource; 1834 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1835 if (dummy == NF4BAD) 1836 goto out_serverfault; 1837 WRITE32(dummy); 1838 } 1839 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1840 if ((buflen -= 4) < 0) 1841 goto out_resource; 1842 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1843 WRITE32(NFS4_FH_PERSISTENT); 1844 else 1845 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1846 } 1847 if (bmval0 & FATTR4_WORD0_CHANGE) { 1848 if ((buflen -= 8) < 0) 1849 goto out_resource; 1850 write_change(&p, &stat, dentry->d_inode); 1851 } 1852 if (bmval0 & FATTR4_WORD0_SIZE) { 1853 if ((buflen -= 8) < 0) 1854 goto out_resource; 1855 WRITE64(stat.size); 1856 } 1857 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1858 if ((buflen -= 4) < 0) 1859 goto out_resource; 1860 WRITE32(1); 1861 } 1862 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1863 if ((buflen -= 4) < 0) 1864 goto out_resource; 1865 WRITE32(1); 1866 } 1867 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1868 if ((buflen -= 4) < 0) 1869 goto out_resource; 1870 WRITE32(0); 1871 } 1872 if (bmval0 & FATTR4_WORD0_FSID) { 1873 if ((buflen -= 16) < 0) 1874 goto out_resource; 1875 if (exp->ex_fslocs.migrated) { 1876 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1877 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1878 } else switch(fsid_source(fhp)) { 1879 case FSIDSOURCE_FSID: 1880 WRITE64((u64)exp->ex_fsid); 1881 WRITE64((u64)0); 1882 break; 1883 case FSIDSOURCE_DEV: 1884 WRITE32(0); 1885 WRITE32(MAJOR(stat.dev)); 1886 WRITE32(0); 1887 WRITE32(MINOR(stat.dev)); 1888 break; 1889 case FSIDSOURCE_UUID: 1890 WRITEMEM(exp->ex_uuid, 16); 1891 break; 1892 } 1893 } 1894 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1895 if ((buflen -= 4) < 0) 1896 goto out_resource; 1897 WRITE32(0); 1898 } 1899 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1900 if ((buflen -= 4) < 0) 1901 goto out_resource; 1902 WRITE32(NFSD_LEASE_TIME); 1903 } 1904 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1905 if ((buflen -= 4) < 0) 1906 goto out_resource; 1907 WRITE32(rdattr_err); 1908 } 1909 if (bmval0 & FATTR4_WORD0_ACL) { 1910 struct nfs4_ace *ace; 1911 1912 if (acl == NULL) { 1913 if ((buflen -= 4) < 0) 1914 goto out_resource; 1915 1916 WRITE32(0); 1917 goto out_acl; 1918 } 1919 if ((buflen -= 4) < 0) 1920 goto out_resource; 1921 WRITE32(acl->naces); 1922 1923 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1924 if ((buflen -= 4*3) < 0) 1925 goto out_resource; 1926 WRITE32(ace->type); 1927 WRITE32(ace->flag); 1928 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1929 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1930 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1931 &p, &buflen); 1932 if (status == nfserr_resource) 1933 goto out_resource; 1934 if (status) 1935 goto out; 1936 } 1937 } 1938 out_acl: 1939 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1940 if ((buflen -= 4) < 0) 1941 goto out_resource; 1942 WRITE32(aclsupport ? 1943 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1944 } 1945 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1946 if ((buflen -= 4) < 0) 1947 goto out_resource; 1948 WRITE32(1); 1949 } 1950 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1951 if ((buflen -= 4) < 0) 1952 goto out_resource; 1953 WRITE32(1); 1954 } 1955 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1956 if ((buflen -= 4) < 0) 1957 goto out_resource; 1958 WRITE32(1); 1959 } 1960 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1961 if ((buflen -= 4) < 0) 1962 goto out_resource; 1963 WRITE32(1); 1964 } 1965 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1966 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1967 if (buflen < 0) 1968 goto out_resource; 1969 WRITE32(fhp->fh_handle.fh_size); 1970 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1971 } 1972 if (bmval0 & FATTR4_WORD0_FILEID) { 1973 if ((buflen -= 8) < 0) 1974 goto out_resource; 1975 WRITE64(stat.ino); 1976 } 1977 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1978 if ((buflen -= 8) < 0) 1979 goto out_resource; 1980 WRITE64((u64) statfs.f_ffree); 1981 } 1982 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1983 if ((buflen -= 8) < 0) 1984 goto out_resource; 1985 WRITE64((u64) statfs.f_ffree); 1986 } 1987 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1988 if ((buflen -= 8) < 0) 1989 goto out_resource; 1990 WRITE64((u64) statfs.f_files); 1991 } 1992 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1993 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1994 if (status == nfserr_resource) 1995 goto out_resource; 1996 if (status) 1997 goto out; 1998 } 1999 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2000 if ((buflen -= 4) < 0) 2001 goto out_resource; 2002 WRITE32(1); 2003 } 2004 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2005 if ((buflen -= 8) < 0) 2006 goto out_resource; 2007 WRITE64(~(u64)0); 2008 } 2009 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2010 if ((buflen -= 4) < 0) 2011 goto out_resource; 2012 WRITE32(255); 2013 } 2014 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2015 if ((buflen -= 4) < 0) 2016 goto out_resource; 2017 WRITE32(statfs.f_namelen); 2018 } 2019 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2020 if ((buflen -= 8) < 0) 2021 goto out_resource; 2022 WRITE64((u64) svc_max_payload(rqstp)); 2023 } 2024 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2025 if ((buflen -= 8) < 0) 2026 goto out_resource; 2027 WRITE64((u64) svc_max_payload(rqstp)); 2028 } 2029 if (bmval1 & FATTR4_WORD1_MODE) { 2030 if ((buflen -= 4) < 0) 2031 goto out_resource; 2032 WRITE32(stat.mode & S_IALLUGO); 2033 } 2034 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2035 if ((buflen -= 4) < 0) 2036 goto out_resource; 2037 WRITE32(1); 2038 } 2039 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2040 if ((buflen -= 4) < 0) 2041 goto out_resource; 2042 WRITE32(stat.nlink); 2043 } 2044 if (bmval1 & FATTR4_WORD1_OWNER) { 2045 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2046 if (status == nfserr_resource) 2047 goto out_resource; 2048 if (status) 2049 goto out; 2050 } 2051 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2052 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2053 if (status == nfserr_resource) 2054 goto out_resource; 2055 if (status) 2056 goto out; 2057 } 2058 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2059 if ((buflen -= 8) < 0) 2060 goto out_resource; 2061 WRITE32((u32) MAJOR(stat.rdev)); 2062 WRITE32((u32) MINOR(stat.rdev)); 2063 } 2064 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2065 if ((buflen -= 8) < 0) 2066 goto out_resource; 2067 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2068 WRITE64(dummy64); 2069 } 2070 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2071 if ((buflen -= 8) < 0) 2072 goto out_resource; 2073 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2074 WRITE64(dummy64); 2075 } 2076 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2077 if ((buflen -= 8) < 0) 2078 goto out_resource; 2079 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2080 WRITE64(dummy64); 2081 } 2082 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2083 if ((buflen -= 8) < 0) 2084 goto out_resource; 2085 dummy64 = (u64)stat.blocks << 9; 2086 WRITE64(dummy64); 2087 } 2088 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2089 if ((buflen -= 12) < 0) 2090 goto out_resource; 2091 WRITE32(0); 2092 WRITE32(stat.atime.tv_sec); 2093 WRITE32(stat.atime.tv_nsec); 2094 } 2095 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2096 if ((buflen -= 12) < 0) 2097 goto out_resource; 2098 WRITE32(0); 2099 WRITE32(1); 2100 WRITE32(0); 2101 } 2102 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2103 if ((buflen -= 12) < 0) 2104 goto out_resource; 2105 WRITE32(0); 2106 WRITE32(stat.ctime.tv_sec); 2107 WRITE32(stat.ctime.tv_nsec); 2108 } 2109 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2110 if ((buflen -= 12) < 0) 2111 goto out_resource; 2112 WRITE32(0); 2113 WRITE32(stat.mtime.tv_sec); 2114 WRITE32(stat.mtime.tv_nsec); 2115 } 2116 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2117 if ((buflen -= 8) < 0) 2118 goto out_resource; 2119 /* 2120 * Get parent's attributes if not ignoring crossmount 2121 * and this is the root of a cross-mounted filesystem. 2122 */ 2123 if (ignore_crossmnt == 0 && 2124 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { 2125 err = vfs_getattr(exp->ex_path.mnt->mnt_parent, 2126 exp->ex_path.mnt->mnt_mountpoint, &stat); 2127 if (err) 2128 goto out_nfserr; 2129 } 2130 WRITE64(stat.ino); 2131 } 2132 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2133 WRITE32(3); 2134 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2135 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2136 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2137 } 2138 2139 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2140 *countp = p - buffer; 2141 status = nfs_ok; 2142 2143 out: 2144 kfree(acl); 2145 if (fhp == &tempfh) 2146 fh_put(&tempfh); 2147 return status; 2148 out_nfserr: 2149 status = nfserrno(err); 2150 goto out; 2151 out_resource: 2152 *countp = 0; 2153 status = nfserr_resource; 2154 goto out; 2155 out_serverfault: 2156 status = nfserr_serverfault; 2157 goto out; 2158 } 2159 2160 static inline int attributes_need_mount(u32 *bmval) 2161 { 2162 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2163 return 1; 2164 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2165 return 1; 2166 return 0; 2167 } 2168 2169 static __be32 2170 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2171 const char *name, int namlen, __be32 *p, int *buflen) 2172 { 2173 struct svc_export *exp = cd->rd_fhp->fh_export; 2174 struct dentry *dentry; 2175 __be32 nfserr; 2176 int ignore_crossmnt = 0; 2177 2178 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2179 if (IS_ERR(dentry)) 2180 return nfserrno(PTR_ERR(dentry)); 2181 if (!dentry->d_inode) { 2182 /* 2183 * nfsd_buffered_readdir drops the i_mutex between 2184 * readdir and calling this callback, leaving a window 2185 * where this directory entry could have gone away. 2186 */ 2187 dput(dentry); 2188 return nfserr_noent; 2189 } 2190 2191 exp_get(exp); 2192 /* 2193 * In the case of a mountpoint, the client may be asking for 2194 * attributes that are only properties of the underlying filesystem 2195 * as opposed to the cross-mounted file system. In such a case, 2196 * we will not follow the cross mount and will fill the attribtutes 2197 * directly from the mountpoint dentry. 2198 */ 2199 if (nfsd_mountpoint(dentry, exp)) { 2200 int err; 2201 2202 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2203 && !attributes_need_mount(cd->rd_bmval)) { 2204 ignore_crossmnt = 1; 2205 goto out_encode; 2206 } 2207 /* 2208 * Why the heck aren't we just using nfsd_lookup?? 2209 * Different "."/".." handling? Something else? 2210 * At least, add a comment here to explain.... 2211 */ 2212 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2213 if (err) { 2214 nfserr = nfserrno(err); 2215 goto out_put; 2216 } 2217 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2218 if (nfserr) 2219 goto out_put; 2220 2221 } 2222 out_encode: 2223 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2224 cd->rd_rqstp, ignore_crossmnt); 2225 out_put: 2226 dput(dentry); 2227 exp_put(exp); 2228 return nfserr; 2229 } 2230 2231 static __be32 * 2232 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2233 { 2234 __be32 *attrlenp; 2235 2236 if (buflen < 6) 2237 return NULL; 2238 *p++ = htonl(2); 2239 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2240 *p++ = htonl(0); /* bmval1 */ 2241 2242 attrlenp = p++; 2243 *p++ = nfserr; /* no htonl */ 2244 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2245 return p; 2246 } 2247 2248 static int 2249 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2250 loff_t offset, u64 ino, unsigned int d_type) 2251 { 2252 struct readdir_cd *ccd = ccdv; 2253 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2254 int buflen; 2255 __be32 *p = cd->buffer; 2256 __be32 *cookiep; 2257 __be32 nfserr = nfserr_toosmall; 2258 2259 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2260 if (name && isdotent(name, namlen)) { 2261 cd->common.err = nfs_ok; 2262 return 0; 2263 } 2264 2265 if (cd->offset) 2266 xdr_encode_hyper(cd->offset, (u64) offset); 2267 2268 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2269 if (buflen < 0) 2270 goto fail; 2271 2272 *p++ = xdr_one; /* mark entry present */ 2273 cookiep = p; 2274 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2275 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2276 2277 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2278 switch (nfserr) { 2279 case nfs_ok: 2280 p += buflen; 2281 break; 2282 case nfserr_resource: 2283 nfserr = nfserr_toosmall; 2284 goto fail; 2285 case nfserr_dropit: 2286 goto fail; 2287 case nfserr_noent: 2288 goto skip_entry; 2289 default: 2290 /* 2291 * If the client requested the RDATTR_ERROR attribute, 2292 * we stuff the error code into this attribute 2293 * and continue. If this attribute was not requested, 2294 * then in accordance with the spec, we fail the 2295 * entire READDIR operation(!) 2296 */ 2297 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2298 goto fail; 2299 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2300 if (p == NULL) { 2301 nfserr = nfserr_toosmall; 2302 goto fail; 2303 } 2304 } 2305 cd->buflen -= (p - cd->buffer); 2306 cd->buffer = p; 2307 cd->offset = cookiep; 2308 skip_entry: 2309 cd->common.err = nfs_ok; 2310 return 0; 2311 fail: 2312 cd->common.err = nfserr; 2313 return -EINVAL; 2314 } 2315 2316 static void 2317 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2318 { 2319 __be32 *p; 2320 2321 RESERVE_SPACE(sizeof(stateid_t)); 2322 WRITE32(sid->si_generation); 2323 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2324 ADJUST_ARGS(); 2325 } 2326 2327 static __be32 2328 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2329 { 2330 __be32 *p; 2331 2332 if (!nfserr) { 2333 RESERVE_SPACE(8); 2334 WRITE32(access->ac_supported); 2335 WRITE32(access->ac_resp_access); 2336 ADJUST_ARGS(); 2337 } 2338 return nfserr; 2339 } 2340 2341 static __be32 2342 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2343 { 2344 ENCODE_SEQID_OP_HEAD; 2345 2346 if (!nfserr) 2347 nfsd4_encode_stateid(resp, &close->cl_stateid); 2348 2349 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2350 return nfserr; 2351 } 2352 2353 2354 static __be32 2355 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2356 { 2357 __be32 *p; 2358 2359 if (!nfserr) { 2360 RESERVE_SPACE(8); 2361 WRITEMEM(commit->co_verf.data, 8); 2362 ADJUST_ARGS(); 2363 } 2364 return nfserr; 2365 } 2366 2367 static __be32 2368 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2369 { 2370 __be32 *p; 2371 2372 if (!nfserr) { 2373 RESERVE_SPACE(32); 2374 write_cinfo(&p, &create->cr_cinfo); 2375 WRITE32(2); 2376 WRITE32(create->cr_bmval[0]); 2377 WRITE32(create->cr_bmval[1]); 2378 ADJUST_ARGS(); 2379 } 2380 return nfserr; 2381 } 2382 2383 static __be32 2384 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2385 { 2386 struct svc_fh *fhp = getattr->ga_fhp; 2387 int buflen; 2388 2389 if (nfserr) 2390 return nfserr; 2391 2392 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2393 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2394 resp->p, &buflen, getattr->ga_bmval, 2395 resp->rqstp, 0); 2396 if (!nfserr) 2397 resp->p += buflen; 2398 return nfserr; 2399 } 2400 2401 static __be32 2402 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2403 { 2404 struct svc_fh *fhp = *fhpp; 2405 unsigned int len; 2406 __be32 *p; 2407 2408 if (!nfserr) { 2409 len = fhp->fh_handle.fh_size; 2410 RESERVE_SPACE(len + 4); 2411 WRITE32(len); 2412 WRITEMEM(&fhp->fh_handle.fh_base, len); 2413 ADJUST_ARGS(); 2414 } 2415 return nfserr; 2416 } 2417 2418 /* 2419 * Including all fields other than the name, a LOCK4denied structure requires 2420 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2421 */ 2422 static void 2423 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2424 { 2425 __be32 *p; 2426 2427 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2428 WRITE64(ld->ld_start); 2429 WRITE64(ld->ld_length); 2430 WRITE32(ld->ld_type); 2431 if (ld->ld_sop) { 2432 WRITEMEM(&ld->ld_clientid, 8); 2433 WRITE32(ld->ld_sop->so_owner.len); 2434 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2435 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2436 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2437 WRITE64((u64)0); /* clientid */ 2438 WRITE32(0); /* length of owner name */ 2439 } 2440 ADJUST_ARGS(); 2441 } 2442 2443 static __be32 2444 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2445 { 2446 ENCODE_SEQID_OP_HEAD; 2447 2448 if (!nfserr) 2449 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2450 else if (nfserr == nfserr_denied) 2451 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2452 2453 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2454 return nfserr; 2455 } 2456 2457 static __be32 2458 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2459 { 2460 if (nfserr == nfserr_denied) 2461 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2462 return nfserr; 2463 } 2464 2465 static __be32 2466 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2467 { 2468 ENCODE_SEQID_OP_HEAD; 2469 2470 if (!nfserr) 2471 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2472 2473 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2474 return nfserr; 2475 } 2476 2477 2478 static __be32 2479 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2480 { 2481 __be32 *p; 2482 2483 if (!nfserr) { 2484 RESERVE_SPACE(20); 2485 write_cinfo(&p, &link->li_cinfo); 2486 ADJUST_ARGS(); 2487 } 2488 return nfserr; 2489 } 2490 2491 2492 static __be32 2493 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2494 { 2495 __be32 *p; 2496 ENCODE_SEQID_OP_HEAD; 2497 2498 if (nfserr) 2499 goto out; 2500 2501 nfsd4_encode_stateid(resp, &open->op_stateid); 2502 RESERVE_SPACE(40); 2503 write_cinfo(&p, &open->op_cinfo); 2504 WRITE32(open->op_rflags); 2505 WRITE32(2); 2506 WRITE32(open->op_bmval[0]); 2507 WRITE32(open->op_bmval[1]); 2508 WRITE32(open->op_delegate_type); 2509 ADJUST_ARGS(); 2510 2511 switch (open->op_delegate_type) { 2512 case NFS4_OPEN_DELEGATE_NONE: 2513 break; 2514 case NFS4_OPEN_DELEGATE_READ: 2515 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2516 RESERVE_SPACE(20); 2517 WRITE32(open->op_recall); 2518 2519 /* 2520 * TODO: ACE's in delegations 2521 */ 2522 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2523 WRITE32(0); 2524 WRITE32(0); 2525 WRITE32(0); /* XXX: is NULL principal ok? */ 2526 ADJUST_ARGS(); 2527 break; 2528 case NFS4_OPEN_DELEGATE_WRITE: 2529 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2530 RESERVE_SPACE(32); 2531 WRITE32(0); 2532 2533 /* 2534 * TODO: space_limit's in delegations 2535 */ 2536 WRITE32(NFS4_LIMIT_SIZE); 2537 WRITE32(~(u32)0); 2538 WRITE32(~(u32)0); 2539 2540 /* 2541 * TODO: ACE's in delegations 2542 */ 2543 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2544 WRITE32(0); 2545 WRITE32(0); 2546 WRITE32(0); /* XXX: is NULL principal ok? */ 2547 ADJUST_ARGS(); 2548 break; 2549 default: 2550 BUG(); 2551 } 2552 /* XXX save filehandle here */ 2553 out: 2554 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2555 return nfserr; 2556 } 2557 2558 static __be32 2559 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2560 { 2561 ENCODE_SEQID_OP_HEAD; 2562 2563 if (!nfserr) 2564 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2565 2566 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2567 return nfserr; 2568 } 2569 2570 static __be32 2571 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2572 { 2573 ENCODE_SEQID_OP_HEAD; 2574 2575 if (!nfserr) 2576 nfsd4_encode_stateid(resp, &od->od_stateid); 2577 2578 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2579 return nfserr; 2580 } 2581 2582 static __be32 2583 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2584 struct nfsd4_read *read) 2585 { 2586 u32 eof; 2587 int v, pn; 2588 unsigned long maxcount; 2589 long len; 2590 __be32 *p; 2591 2592 if (nfserr) 2593 return nfserr; 2594 if (resp->xbuf->page_len) 2595 return nfserr_resource; 2596 2597 RESERVE_SPACE(8); /* eof flag and byte count */ 2598 2599 maxcount = svc_max_payload(resp->rqstp); 2600 if (maxcount > read->rd_length) 2601 maxcount = read->rd_length; 2602 2603 len = maxcount; 2604 v = 0; 2605 while (len > 0) { 2606 pn = resp->rqstp->rq_resused++; 2607 resp->rqstp->rq_vec[v].iov_base = 2608 page_address(resp->rqstp->rq_respages[pn]); 2609 resp->rqstp->rq_vec[v].iov_len = 2610 len < PAGE_SIZE ? len : PAGE_SIZE; 2611 v++; 2612 len -= PAGE_SIZE; 2613 } 2614 read->rd_vlen = v; 2615 2616 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2617 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2618 &maxcount); 2619 2620 if (nfserr == nfserr_symlink) 2621 nfserr = nfserr_inval; 2622 if (nfserr) 2623 return nfserr; 2624 eof = (read->rd_offset + maxcount >= 2625 read->rd_fhp->fh_dentry->d_inode->i_size); 2626 2627 WRITE32(eof); 2628 WRITE32(maxcount); 2629 ADJUST_ARGS(); 2630 resp->xbuf->head[0].iov_len = (char*)p 2631 - (char*)resp->xbuf->head[0].iov_base; 2632 resp->xbuf->page_len = maxcount; 2633 2634 /* Use rest of head for padding and remaining ops: */ 2635 resp->xbuf->tail[0].iov_base = p; 2636 resp->xbuf->tail[0].iov_len = 0; 2637 if (maxcount&3) { 2638 RESERVE_SPACE(4); 2639 WRITE32(0); 2640 resp->xbuf->tail[0].iov_base += maxcount&3; 2641 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2642 ADJUST_ARGS(); 2643 } 2644 return 0; 2645 } 2646 2647 static __be32 2648 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2649 { 2650 int maxcount; 2651 char *page; 2652 __be32 *p; 2653 2654 if (nfserr) 2655 return nfserr; 2656 if (resp->xbuf->page_len) 2657 return nfserr_resource; 2658 2659 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2660 2661 maxcount = PAGE_SIZE; 2662 RESERVE_SPACE(4); 2663 2664 /* 2665 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2666 * if they would overflow the buffer. Is this kosher in NFSv4? If 2667 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2668 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2669 */ 2670 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2671 if (nfserr == nfserr_isdir) 2672 return nfserr_inval; 2673 if (nfserr) 2674 return nfserr; 2675 2676 WRITE32(maxcount); 2677 ADJUST_ARGS(); 2678 resp->xbuf->head[0].iov_len = (char*)p 2679 - (char*)resp->xbuf->head[0].iov_base; 2680 resp->xbuf->page_len = maxcount; 2681 2682 /* Use rest of head for padding and remaining ops: */ 2683 resp->xbuf->tail[0].iov_base = p; 2684 resp->xbuf->tail[0].iov_len = 0; 2685 if (maxcount&3) { 2686 RESERVE_SPACE(4); 2687 WRITE32(0); 2688 resp->xbuf->tail[0].iov_base += maxcount&3; 2689 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2690 ADJUST_ARGS(); 2691 } 2692 return 0; 2693 } 2694 2695 static __be32 2696 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2697 { 2698 int maxcount; 2699 loff_t offset; 2700 __be32 *page, *savep, *tailbase; 2701 __be32 *p; 2702 2703 if (nfserr) 2704 return nfserr; 2705 if (resp->xbuf->page_len) 2706 return nfserr_resource; 2707 2708 RESERVE_SPACE(8); /* verifier */ 2709 savep = p; 2710 2711 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2712 WRITE32(0); 2713 WRITE32(0); 2714 ADJUST_ARGS(); 2715 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2716 tailbase = p; 2717 2718 maxcount = PAGE_SIZE; 2719 if (maxcount > readdir->rd_maxcount) 2720 maxcount = readdir->rd_maxcount; 2721 2722 /* 2723 * Convert from bytes to words, account for the two words already 2724 * written, make sure to leave two words at the end for the next 2725 * pointer and eof field. 2726 */ 2727 maxcount = (maxcount >> 2) - 4; 2728 if (maxcount < 0) { 2729 nfserr = nfserr_toosmall; 2730 goto err_no_verf; 2731 } 2732 2733 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2734 readdir->common.err = 0; 2735 readdir->buflen = maxcount; 2736 readdir->buffer = page; 2737 readdir->offset = NULL; 2738 2739 offset = readdir->rd_cookie; 2740 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2741 &offset, 2742 &readdir->common, nfsd4_encode_dirent); 2743 if (nfserr == nfs_ok && 2744 readdir->common.err == nfserr_toosmall && 2745 readdir->buffer == page) 2746 nfserr = nfserr_toosmall; 2747 if (nfserr == nfserr_symlink) 2748 nfserr = nfserr_notdir; 2749 if (nfserr) 2750 goto err_no_verf; 2751 2752 if (readdir->offset) 2753 xdr_encode_hyper(readdir->offset, offset); 2754 2755 p = readdir->buffer; 2756 *p++ = 0; /* no more entries */ 2757 *p++ = htonl(readdir->common.err == nfserr_eof); 2758 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2759 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2760 2761 /* Use rest of head for padding and remaining ops: */ 2762 resp->xbuf->tail[0].iov_base = tailbase; 2763 resp->xbuf->tail[0].iov_len = 0; 2764 resp->p = resp->xbuf->tail[0].iov_base; 2765 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2766 2767 return 0; 2768 err_no_verf: 2769 p = savep; 2770 ADJUST_ARGS(); 2771 return nfserr; 2772 } 2773 2774 static __be32 2775 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2776 { 2777 __be32 *p; 2778 2779 if (!nfserr) { 2780 RESERVE_SPACE(20); 2781 write_cinfo(&p, &remove->rm_cinfo); 2782 ADJUST_ARGS(); 2783 } 2784 return nfserr; 2785 } 2786 2787 static __be32 2788 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2789 { 2790 __be32 *p; 2791 2792 if (!nfserr) { 2793 RESERVE_SPACE(40); 2794 write_cinfo(&p, &rename->rn_sinfo); 2795 write_cinfo(&p, &rename->rn_tinfo); 2796 ADJUST_ARGS(); 2797 } 2798 return nfserr; 2799 } 2800 2801 static __be32 2802 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2803 struct nfsd4_secinfo *secinfo) 2804 { 2805 int i = 0; 2806 struct svc_export *exp = secinfo->si_exp; 2807 u32 nflavs; 2808 struct exp_flavor_info *flavs; 2809 struct exp_flavor_info def_flavs[2]; 2810 __be32 *p; 2811 2812 if (nfserr) 2813 goto out; 2814 if (exp->ex_nflavors) { 2815 flavs = exp->ex_flavors; 2816 nflavs = exp->ex_nflavors; 2817 } else { /* Handling of some defaults in absence of real secinfo: */ 2818 flavs = def_flavs; 2819 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2820 nflavs = 2; 2821 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2822 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2823 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2824 nflavs = 1; 2825 flavs[0].pseudoflavor 2826 = svcauth_gss_flavor(exp->ex_client); 2827 } else { 2828 nflavs = 1; 2829 flavs[0].pseudoflavor 2830 = exp->ex_client->flavour->flavour; 2831 } 2832 } 2833 2834 RESERVE_SPACE(4); 2835 WRITE32(nflavs); 2836 ADJUST_ARGS(); 2837 for (i = 0; i < nflavs; i++) { 2838 u32 flav = flavs[i].pseudoflavor; 2839 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2840 2841 if (gm) { 2842 RESERVE_SPACE(4); 2843 WRITE32(RPC_AUTH_GSS); 2844 ADJUST_ARGS(); 2845 RESERVE_SPACE(4 + gm->gm_oid.len); 2846 WRITE32(gm->gm_oid.len); 2847 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2848 ADJUST_ARGS(); 2849 RESERVE_SPACE(4); 2850 WRITE32(0); /* qop */ 2851 ADJUST_ARGS(); 2852 RESERVE_SPACE(4); 2853 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2854 ADJUST_ARGS(); 2855 gss_mech_put(gm); 2856 } else { 2857 RESERVE_SPACE(4); 2858 WRITE32(flav); 2859 ADJUST_ARGS(); 2860 } 2861 } 2862 out: 2863 if (exp) 2864 exp_put(exp); 2865 return nfserr; 2866 } 2867 2868 /* 2869 * The SETATTR encode routine is special -- it always encodes a bitmap, 2870 * regardless of the error status. 2871 */ 2872 static __be32 2873 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2874 { 2875 __be32 *p; 2876 2877 RESERVE_SPACE(12); 2878 if (nfserr) { 2879 WRITE32(2); 2880 WRITE32(0); 2881 WRITE32(0); 2882 } 2883 else { 2884 WRITE32(2); 2885 WRITE32(setattr->sa_bmval[0]); 2886 WRITE32(setattr->sa_bmval[1]); 2887 } 2888 ADJUST_ARGS(); 2889 return nfserr; 2890 } 2891 2892 static __be32 2893 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2894 { 2895 __be32 *p; 2896 2897 if (!nfserr) { 2898 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2899 WRITEMEM(&scd->se_clientid, 8); 2900 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2901 ADJUST_ARGS(); 2902 } 2903 else if (nfserr == nfserr_clid_inuse) { 2904 RESERVE_SPACE(8); 2905 WRITE32(0); 2906 WRITE32(0); 2907 ADJUST_ARGS(); 2908 } 2909 return nfserr; 2910 } 2911 2912 static __be32 2913 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2914 { 2915 __be32 *p; 2916 2917 if (!nfserr) { 2918 RESERVE_SPACE(16); 2919 WRITE32(write->wr_bytes_written); 2920 WRITE32(write->wr_how_written); 2921 WRITEMEM(write->wr_verifier.data, 8); 2922 ADJUST_ARGS(); 2923 } 2924 return nfserr; 2925 } 2926 2927 static __be32 2928 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 2929 struct nfsd4_exchange_id *exid) 2930 { 2931 __be32 *p; 2932 char *major_id; 2933 char *server_scope; 2934 int major_id_sz; 2935 int server_scope_sz; 2936 uint64_t minor_id = 0; 2937 2938 if (nfserr) 2939 return nfserr; 2940 2941 major_id = utsname()->nodename; 2942 major_id_sz = strlen(major_id); 2943 server_scope = utsname()->nodename; 2944 server_scope_sz = strlen(server_scope); 2945 2946 RESERVE_SPACE( 2947 8 /* eir_clientid */ + 2948 4 /* eir_sequenceid */ + 2949 4 /* eir_flags */ + 2950 4 /* spr_how (SP4_NONE) */ + 2951 8 /* so_minor_id */ + 2952 4 /* so_major_id.len */ + 2953 (XDR_QUADLEN(major_id_sz) * 4) + 2954 4 /* eir_server_scope.len */ + 2955 (XDR_QUADLEN(server_scope_sz) * 4) + 2956 4 /* eir_server_impl_id.count (0) */); 2957 2958 WRITEMEM(&exid->clientid, 8); 2959 WRITE32(exid->seqid); 2960 WRITE32(exid->flags); 2961 2962 /* state_protect4_r. Currently only support SP4_NONE */ 2963 BUG_ON(exid->spa_how != SP4_NONE); 2964 WRITE32(exid->spa_how); 2965 2966 /* The server_owner struct */ 2967 WRITE64(minor_id); /* Minor id */ 2968 /* major id */ 2969 WRITE32(major_id_sz); 2970 WRITEMEM(major_id, major_id_sz); 2971 2972 /* Server scope */ 2973 WRITE32(server_scope_sz); 2974 WRITEMEM(server_scope, server_scope_sz); 2975 2976 /* Implementation id */ 2977 WRITE32(0); /* zero length nfs_impl_id4 array */ 2978 ADJUST_ARGS(); 2979 return 0; 2980 } 2981 2982 static __be32 2983 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 2984 struct nfsd4_create_session *sess) 2985 { 2986 __be32 *p; 2987 2988 if (nfserr) 2989 return nfserr; 2990 2991 RESERVE_SPACE(24); 2992 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2993 WRITE32(sess->seqid); 2994 WRITE32(sess->flags); 2995 ADJUST_ARGS(); 2996 2997 RESERVE_SPACE(28); 2998 WRITE32(0); /* headerpadsz */ 2999 WRITE32(sess->fore_channel.maxreq_sz); 3000 WRITE32(sess->fore_channel.maxresp_sz); 3001 WRITE32(sess->fore_channel.maxresp_cached); 3002 WRITE32(sess->fore_channel.maxops); 3003 WRITE32(sess->fore_channel.maxreqs); 3004 WRITE32(sess->fore_channel.nr_rdma_attrs); 3005 ADJUST_ARGS(); 3006 3007 if (sess->fore_channel.nr_rdma_attrs) { 3008 RESERVE_SPACE(4); 3009 WRITE32(sess->fore_channel.rdma_attrs); 3010 ADJUST_ARGS(); 3011 } 3012 3013 RESERVE_SPACE(28); 3014 WRITE32(0); /* headerpadsz */ 3015 WRITE32(sess->back_channel.maxreq_sz); 3016 WRITE32(sess->back_channel.maxresp_sz); 3017 WRITE32(sess->back_channel.maxresp_cached); 3018 WRITE32(sess->back_channel.maxops); 3019 WRITE32(sess->back_channel.maxreqs); 3020 WRITE32(sess->back_channel.nr_rdma_attrs); 3021 ADJUST_ARGS(); 3022 3023 if (sess->back_channel.nr_rdma_attrs) { 3024 RESERVE_SPACE(4); 3025 WRITE32(sess->back_channel.rdma_attrs); 3026 ADJUST_ARGS(); 3027 } 3028 return 0; 3029 } 3030 3031 static __be32 3032 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3033 struct nfsd4_destroy_session *destroy_session) 3034 { 3035 return nfserr; 3036 } 3037 3038 __be32 3039 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3040 struct nfsd4_sequence *seq) 3041 { 3042 __be32 *p; 3043 3044 if (nfserr) 3045 return nfserr; 3046 3047 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3048 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3049 WRITE32(seq->seqid); 3050 WRITE32(seq->slotid); 3051 WRITE32(seq->maxslots); 3052 /* 3053 * FIXME: for now: 3054 * target_maxslots = maxslots 3055 * status_flags = 0 3056 */ 3057 WRITE32(seq->maxslots); 3058 WRITE32(0); 3059 3060 ADJUST_ARGS(); 3061 resp->cstate.datap = p; /* DRC cache data pointer */ 3062 return 0; 3063 } 3064 3065 static __be32 3066 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3067 { 3068 return nfserr; 3069 } 3070 3071 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3072 3073 /* 3074 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3075 * since we don't need to filter out obsolete ops as this is 3076 * done in the decoding phase. 3077 */ 3078 static nfsd4_enc nfsd4_enc_ops[] = { 3079 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3080 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3081 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3082 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3083 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3084 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3085 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3086 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3087 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3088 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3089 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3090 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3091 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3092 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3093 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3094 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3095 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3096 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3097 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3098 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3099 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3100 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3101 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3102 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3103 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3104 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3105 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3106 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3107 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3108 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3109 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3110 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3111 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3112 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3113 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3114 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3115 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3116 3117 /* NFSv4.1 operations */ 3118 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3119 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 3120 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3121 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3122 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3123 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3124 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3125 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3126 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3127 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3128 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3129 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3130 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop, 3131 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3132 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3133 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3134 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3135 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3136 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3137 }; 3138 3139 /* 3140 * Calculate the total amount of memory that the compound response has taken 3141 * after encoding the current operation. 3142 * 3143 * pad: add on 8 bytes for the next operation's op_code and status so that 3144 * there is room to cache a failure on the next operation. 3145 * 3146 * Compare this length to the session se_fmaxresp_cached. 3147 * 3148 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3149 * will be at least a page and will therefore hold the xdr_buf head. 3150 */ 3151 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) 3152 { 3153 int status = 0; 3154 struct xdr_buf *xb = &resp->rqstp->rq_res; 3155 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; 3156 struct nfsd4_session *session = NULL; 3157 struct nfsd4_slot *slot = resp->cstate.slot; 3158 u32 length, tlen = 0, pad = 8; 3159 3160 if (!nfsd4_has_session(&resp->cstate)) 3161 return status; 3162 3163 session = resp->cstate.session; 3164 if (session == NULL || slot->sl_cachethis == 0) 3165 return status; 3166 3167 if (resp->opcnt >= args->opcnt) 3168 pad = 0; /* this is the last operation */ 3169 3170 if (xb->page_len == 0) { 3171 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3172 } else { 3173 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3174 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3175 3176 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3177 } 3178 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3179 length, xb->page_len, tlen, pad); 3180 3181 if (length <= session->se_fchannel.maxresp_cached) 3182 return status; 3183 else 3184 return nfserr_rep_too_big_to_cache; 3185 } 3186 3187 void 3188 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3189 { 3190 __be32 *statp; 3191 __be32 *p; 3192 3193 RESERVE_SPACE(8); 3194 WRITE32(op->opnum); 3195 statp = p++; /* to be backfilled at the end */ 3196 ADJUST_ARGS(); 3197 3198 if (op->opnum == OP_ILLEGAL) 3199 goto status; 3200 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3201 !nfsd4_enc_ops[op->opnum]); 3202 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3203 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3204 if (!op->status && nfsd4_check_drc_limit(resp)) 3205 op->status = nfserr_rep_too_big_to_cache; 3206 status: 3207 /* 3208 * Note: We write the status directly, instead of using WRITE32(), 3209 * since it is already in network byte order. 3210 */ 3211 *statp = op->status; 3212 } 3213 3214 /* 3215 * Encode the reply stored in the stateowner reply cache 3216 * 3217 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3218 * previously sent already encoded operation. 3219 * 3220 * called with nfs4_lock_state() held 3221 */ 3222 void 3223 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3224 { 3225 __be32 *p; 3226 struct nfs4_replay *rp = op->replay; 3227 3228 BUG_ON(!rp); 3229 3230 RESERVE_SPACE(8); 3231 WRITE32(op->opnum); 3232 *p++ = rp->rp_status; /* already xdr'ed */ 3233 ADJUST_ARGS(); 3234 3235 RESERVE_SPACE(rp->rp_buflen); 3236 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3237 ADJUST_ARGS(); 3238 } 3239 3240 int 3241 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3242 { 3243 return xdr_ressize_check(rqstp, p); 3244 } 3245 3246 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 3247 { 3248 if (args->ops != args->iops) { 3249 kfree(args->ops); 3250 args->ops = args->iops; 3251 } 3252 kfree(args->tmpp); 3253 args->tmpp = NULL; 3254 while (args->to_free) { 3255 struct tmpbuf *tb = args->to_free; 3256 args->to_free = tb->next; 3257 tb->release(tb->buf); 3258 kfree(tb); 3259 } 3260 } 3261 3262 int 3263 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3264 { 3265 __be32 status; 3266 3267 args->p = p; 3268 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3269 args->pagelist = rqstp->rq_arg.pages; 3270 args->pagelen = rqstp->rq_arg.page_len; 3271 args->tmpp = NULL; 3272 args->to_free = NULL; 3273 args->ops = args->iops; 3274 args->rqstp = rqstp; 3275 3276 status = nfsd4_decode_compound(args); 3277 if (status) { 3278 nfsd4_release_compoundargs(args); 3279 } 3280 return !status; 3281 } 3282 3283 int 3284 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3285 { 3286 /* 3287 * All that remains is to write the tag and operation count... 3288 */ 3289 struct nfsd4_compound_state *cs = &resp->cstate; 3290 struct kvec *iov; 3291 p = resp->tagp; 3292 *p++ = htonl(resp->taglen); 3293 memcpy(p, resp->tag, resp->taglen); 3294 p += XDR_QUADLEN(resp->taglen); 3295 *p++ = htonl(resp->opcnt); 3296 3297 if (rqstp->rq_res.page_len) 3298 iov = &rqstp->rq_res.tail[0]; 3299 else 3300 iov = &rqstp->rq_res.head[0]; 3301 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3302 BUG_ON(iov->iov_len > PAGE_SIZE); 3303 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) { 3304 nfsd4_store_cache_entry(resp); 3305 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3306 resp->cstate.slot->sl_inuse = false; 3307 nfsd4_put_session(resp->cstate.session); 3308 } 3309 return 1; 3310 } 3311 3312 /* 3313 * Local variables: 3314 * c-basic-offset: 8 3315 * End: 3316 */ 3317