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/slab.h> 44 #include <linux/namei.h> 45 #include <linux/statfs.h> 46 #include <linux/utsname.h> 47 #include <linux/nfsd_idmap.h> 48 #include <linux/nfs4_acl.h> 49 #include <linux/sunrpc/svcauth_gss.h> 50 51 #include "xdr4.h" 52 #include "vfs.h" 53 54 #define NFSDDBG_FACILITY NFSDDBG_XDR 55 56 /* 57 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 58 * directory in order to indicate to the client that a filesystem boundary is present 59 * We use a fixed fsid for a referral 60 */ 61 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 62 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 63 64 static __be32 65 check_filename(char *str, int len, __be32 err) 66 { 67 int i; 68 69 if (len == 0) 70 return nfserr_inval; 71 if (isdotent(str, len)) 72 return err; 73 for (i = 0; i < len; i++) 74 if (str[i] == '/') 75 return err; 76 return 0; 77 } 78 79 #define DECODE_HEAD \ 80 __be32 *p; \ 81 __be32 status 82 #define DECODE_TAIL \ 83 status = 0; \ 84 out: \ 85 return status; \ 86 xdr_error: \ 87 dprintk("NFSD: xdr error (%s:%d)\n", \ 88 __FILE__, __LINE__); \ 89 status = nfserr_bad_xdr; \ 90 goto out 91 92 #define READ32(x) (x) = ntohl(*p++) 93 #define READ64(x) do { \ 94 (x) = (u64)ntohl(*p++) << 32; \ 95 (x) |= ntohl(*p++); \ 96 } while (0) 97 #define READTIME(x) do { \ 98 p++; \ 99 (x) = ntohl(*p++); \ 100 p++; \ 101 } while (0) 102 #define READMEM(x,nbytes) do { \ 103 x = (char *)p; \ 104 p += XDR_QUADLEN(nbytes); \ 105 } while (0) 106 #define SAVEMEM(x,nbytes) do { \ 107 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 108 savemem(argp, p, nbytes) : \ 109 (char *)p)) { \ 110 dprintk("NFSD: xdr error (%s:%d)\n", \ 111 __FILE__, __LINE__); \ 112 goto xdr_error; \ 113 } \ 114 p += XDR_QUADLEN(nbytes); \ 115 } while (0) 116 #define COPYMEM(x,nbytes) do { \ 117 memcpy((x), p, nbytes); \ 118 p += XDR_QUADLEN(nbytes); \ 119 } while (0) 120 121 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 122 #define READ_BUF(nbytes) do { \ 123 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 124 p = argp->p; \ 125 argp->p += XDR_QUADLEN(nbytes); \ 126 } else if (!(p = read_buf(argp, nbytes))) { \ 127 dprintk("NFSD: xdr error (%s:%d)\n", \ 128 __FILE__, __LINE__); \ 129 goto xdr_error; \ 130 } \ 131 } while (0) 132 133 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 134 { 135 /* We want more bytes than seem to be available. 136 * Maybe we need a new page, maybe we have just run out 137 */ 138 unsigned int avail = (char *)argp->end - (char *)argp->p; 139 __be32 *p; 140 if (avail + argp->pagelen < nbytes) 141 return NULL; 142 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 143 return NULL; 144 /* ok, we can do it with the current plus the next page */ 145 if (nbytes <= sizeof(argp->tmp)) 146 p = argp->tmp; 147 else { 148 kfree(argp->tmpp); 149 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 150 if (!p) 151 return NULL; 152 153 } 154 /* 155 * The following memcpy is safe because read_buf is always 156 * called with nbytes > avail, and the two cases above both 157 * guarantee p points to at least nbytes bytes. 158 */ 159 memcpy(p, argp->p, avail); 160 /* step to next page */ 161 argp->p = page_address(argp->pagelist[0]); 162 argp->pagelist++; 163 if (argp->pagelen < PAGE_SIZE) { 164 argp->end = p + (argp->pagelen>>2); 165 argp->pagelen = 0; 166 } else { 167 argp->end = p + (PAGE_SIZE>>2); 168 argp->pagelen -= PAGE_SIZE; 169 } 170 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 171 argp->p += XDR_QUADLEN(nbytes - avail); 172 return p; 173 } 174 175 static int zero_clientid(clientid_t *clid) 176 { 177 return (clid->cl_boot == 0) && (clid->cl_id == 0); 178 } 179 180 static int 181 defer_free(struct nfsd4_compoundargs *argp, 182 void (*release)(const void *), void *p) 183 { 184 struct tmpbuf *tb; 185 186 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 187 if (!tb) 188 return -ENOMEM; 189 tb->buf = p; 190 tb->release = release; 191 tb->next = argp->to_free; 192 argp->to_free = tb; 193 return 0; 194 } 195 196 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 197 { 198 if (p == argp->tmp) { 199 p = kmalloc(nbytes, GFP_KERNEL); 200 if (!p) 201 return NULL; 202 memcpy(p, argp->tmp, nbytes); 203 } else { 204 BUG_ON(p != argp->tmpp); 205 argp->tmpp = NULL; 206 } 207 if (defer_free(argp, kfree, p)) { 208 kfree(p); 209 return NULL; 210 } else 211 return (char *)p; 212 } 213 214 static __be32 215 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 216 { 217 u32 bmlen; 218 DECODE_HEAD; 219 220 bmval[0] = 0; 221 bmval[1] = 0; 222 bmval[2] = 0; 223 224 READ_BUF(4); 225 READ32(bmlen); 226 if (bmlen > 1000) 227 goto xdr_error; 228 229 READ_BUF(bmlen << 2); 230 if (bmlen > 0) 231 READ32(bmval[0]); 232 if (bmlen > 1) 233 READ32(bmval[1]); 234 if (bmlen > 2) 235 READ32(bmval[2]); 236 237 DECODE_TAIL; 238 } 239 240 static __be32 241 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 242 struct iattr *iattr, struct nfs4_acl **acl) 243 { 244 int expected_len, len = 0; 245 u32 dummy32; 246 char *buf; 247 int host_err; 248 249 DECODE_HEAD; 250 iattr->ia_valid = 0; 251 if ((status = nfsd4_decode_bitmap(argp, bmval))) 252 return status; 253 254 READ_BUF(4); 255 READ32(expected_len); 256 257 if (bmval[0] & FATTR4_WORD0_SIZE) { 258 READ_BUF(8); 259 len += 8; 260 READ64(iattr->ia_size); 261 iattr->ia_valid |= ATTR_SIZE; 262 } 263 if (bmval[0] & FATTR4_WORD0_ACL) { 264 int nace; 265 struct nfs4_ace *ace; 266 267 READ_BUF(4); len += 4; 268 READ32(nace); 269 270 if (nace > NFS4_ACL_MAX) 271 return nfserr_resource; 272 273 *acl = nfs4_acl_new(nace); 274 if (*acl == NULL) { 275 host_err = -ENOMEM; 276 goto out_nfserr; 277 } 278 defer_free(argp, kfree, *acl); 279 280 (*acl)->naces = nace; 281 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 282 READ_BUF(16); len += 16; 283 READ32(ace->type); 284 READ32(ace->flag); 285 READ32(ace->access_mask); 286 READ32(dummy32); 287 READ_BUF(dummy32); 288 len += XDR_QUADLEN(dummy32) << 2; 289 READMEM(buf, dummy32); 290 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 291 host_err = 0; 292 if (ace->whotype != NFS4_ACL_WHO_NAMED) 293 ace->who = 0; 294 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 295 host_err = nfsd_map_name_to_gid(argp->rqstp, 296 buf, dummy32, &ace->who); 297 else 298 host_err = nfsd_map_name_to_uid(argp->rqstp, 299 buf, dummy32, &ace->who); 300 if (host_err) 301 goto out_nfserr; 302 } 303 } else 304 *acl = NULL; 305 if (bmval[1] & FATTR4_WORD1_MODE) { 306 READ_BUF(4); 307 len += 4; 308 READ32(iattr->ia_mode); 309 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 310 iattr->ia_valid |= ATTR_MODE; 311 } 312 if (bmval[1] & FATTR4_WORD1_OWNER) { 313 READ_BUF(4); 314 len += 4; 315 READ32(dummy32); 316 READ_BUF(dummy32); 317 len += (XDR_QUADLEN(dummy32) << 2); 318 READMEM(buf, dummy32); 319 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 320 goto out_nfserr; 321 iattr->ia_valid |= ATTR_UID; 322 } 323 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 324 READ_BUF(4); 325 len += 4; 326 READ32(dummy32); 327 READ_BUF(dummy32); 328 len += (XDR_QUADLEN(dummy32) << 2); 329 READMEM(buf, dummy32); 330 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 331 goto out_nfserr; 332 iattr->ia_valid |= ATTR_GID; 333 } 334 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 335 READ_BUF(4); 336 len += 4; 337 READ32(dummy32); 338 switch (dummy32) { 339 case NFS4_SET_TO_CLIENT_TIME: 340 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 341 all 32 bits of 'nseconds'. */ 342 READ_BUF(12); 343 len += 12; 344 READ32(dummy32); 345 if (dummy32) 346 return nfserr_inval; 347 READ32(iattr->ia_atime.tv_sec); 348 READ32(iattr->ia_atime.tv_nsec); 349 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 350 return nfserr_inval; 351 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 352 break; 353 case NFS4_SET_TO_SERVER_TIME: 354 iattr->ia_valid |= ATTR_ATIME; 355 break; 356 default: 357 goto xdr_error; 358 } 359 } 360 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 361 READ_BUF(4); 362 len += 4; 363 READ32(dummy32); 364 switch (dummy32) { 365 case NFS4_SET_TO_CLIENT_TIME: 366 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 367 all 32 bits of 'nseconds'. */ 368 READ_BUF(12); 369 len += 12; 370 READ32(dummy32); 371 if (dummy32) 372 return nfserr_inval; 373 READ32(iattr->ia_mtime.tv_sec); 374 READ32(iattr->ia_mtime.tv_nsec); 375 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 376 return nfserr_inval; 377 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 378 break; 379 case NFS4_SET_TO_SERVER_TIME: 380 iattr->ia_valid |= ATTR_MTIME; 381 break; 382 default: 383 goto xdr_error; 384 } 385 } 386 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 387 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 388 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 389 READ_BUF(expected_len - len); 390 else if (len != expected_len) 391 goto xdr_error; 392 393 DECODE_TAIL; 394 395 out_nfserr: 396 status = nfserrno(host_err); 397 goto out; 398 } 399 400 static __be32 401 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 402 { 403 DECODE_HEAD; 404 405 READ_BUF(sizeof(stateid_t)); 406 READ32(sid->si_generation); 407 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 408 409 DECODE_TAIL; 410 } 411 412 static __be32 413 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 414 { 415 DECODE_HEAD; 416 417 READ_BUF(4); 418 READ32(access->ac_req_access); 419 420 DECODE_TAIL; 421 } 422 423 static __be32 424 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 425 { 426 DECODE_HEAD; 427 428 close->cl_stateowner = NULL; 429 READ_BUF(4); 430 READ32(close->cl_seqid); 431 return nfsd4_decode_stateid(argp, &close->cl_stateid); 432 433 DECODE_TAIL; 434 } 435 436 437 static __be32 438 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 439 { 440 DECODE_HEAD; 441 442 READ_BUF(12); 443 READ64(commit->co_offset); 444 READ32(commit->co_count); 445 446 DECODE_TAIL; 447 } 448 449 static __be32 450 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 451 { 452 DECODE_HEAD; 453 454 READ_BUF(4); 455 READ32(create->cr_type); 456 switch (create->cr_type) { 457 case NF4LNK: 458 READ_BUF(4); 459 READ32(create->cr_linklen); 460 READ_BUF(create->cr_linklen); 461 SAVEMEM(create->cr_linkname, create->cr_linklen); 462 break; 463 case NF4BLK: 464 case NF4CHR: 465 READ_BUF(8); 466 READ32(create->cr_specdata1); 467 READ32(create->cr_specdata2); 468 break; 469 case NF4SOCK: 470 case NF4FIFO: 471 case NF4DIR: 472 default: 473 break; 474 } 475 476 READ_BUF(4); 477 READ32(create->cr_namelen); 478 READ_BUF(create->cr_namelen); 479 SAVEMEM(create->cr_name, create->cr_namelen); 480 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 481 return status; 482 483 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 484 &create->cr_acl); 485 if (status) 486 goto out; 487 488 DECODE_TAIL; 489 } 490 491 static inline __be32 492 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 493 { 494 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 495 } 496 497 static inline __be32 498 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 499 { 500 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 501 } 502 503 static __be32 504 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 505 { 506 DECODE_HEAD; 507 508 READ_BUF(4); 509 READ32(link->li_namelen); 510 READ_BUF(link->li_namelen); 511 SAVEMEM(link->li_name, link->li_namelen); 512 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 513 return status; 514 515 DECODE_TAIL; 516 } 517 518 static __be32 519 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 520 { 521 DECODE_HEAD; 522 523 lock->lk_replay_owner = NULL; 524 /* 525 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 526 */ 527 READ_BUF(28); 528 READ32(lock->lk_type); 529 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 530 goto xdr_error; 531 READ32(lock->lk_reclaim); 532 READ64(lock->lk_offset); 533 READ64(lock->lk_length); 534 READ32(lock->lk_is_new); 535 536 if (lock->lk_is_new) { 537 READ_BUF(4); 538 READ32(lock->lk_new_open_seqid); 539 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 540 if (status) 541 return status; 542 READ_BUF(8 + sizeof(clientid_t)); 543 READ32(lock->lk_new_lock_seqid); 544 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 545 READ32(lock->lk_new_owner.len); 546 READ_BUF(lock->lk_new_owner.len); 547 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 548 } else { 549 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 550 if (status) 551 return status; 552 READ_BUF(4); 553 READ32(lock->lk_old_lock_seqid); 554 } 555 556 DECODE_TAIL; 557 } 558 559 static __be32 560 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 561 { 562 DECODE_HEAD; 563 564 READ_BUF(32); 565 READ32(lockt->lt_type); 566 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 567 goto xdr_error; 568 READ64(lockt->lt_offset); 569 READ64(lockt->lt_length); 570 COPYMEM(&lockt->lt_clientid, 8); 571 READ32(lockt->lt_owner.len); 572 READ_BUF(lockt->lt_owner.len); 573 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 574 575 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid)) 576 return nfserr_inval; 577 DECODE_TAIL; 578 } 579 580 static __be32 581 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 582 { 583 DECODE_HEAD; 584 585 locku->lu_stateowner = NULL; 586 READ_BUF(8); 587 READ32(locku->lu_type); 588 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 589 goto xdr_error; 590 READ32(locku->lu_seqid); 591 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 592 if (status) 593 return status; 594 READ_BUF(16); 595 READ64(locku->lu_offset); 596 READ64(locku->lu_length); 597 598 DECODE_TAIL; 599 } 600 601 static __be32 602 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 603 { 604 DECODE_HEAD; 605 606 READ_BUF(4); 607 READ32(lookup->lo_len); 608 READ_BUF(lookup->lo_len); 609 SAVEMEM(lookup->lo_name, lookup->lo_len); 610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 611 return status; 612 613 DECODE_TAIL; 614 } 615 616 static __be32 617 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 618 { 619 DECODE_HEAD; 620 621 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 622 open->op_iattr.ia_valid = 0; 623 open->op_stateowner = NULL; 624 625 /* seqid, share_access, share_deny, clientid, ownerlen */ 626 READ_BUF(16 + sizeof(clientid_t)); 627 READ32(open->op_seqid); 628 READ32(open->op_share_access); 629 READ32(open->op_share_deny); 630 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 631 READ32(open->op_owner.len); 632 633 /* owner, open_flag */ 634 READ_BUF(open->op_owner.len + 4); 635 SAVEMEM(open->op_owner.data, open->op_owner.len); 636 READ32(open->op_create); 637 switch (open->op_create) { 638 case NFS4_OPEN_NOCREATE: 639 break; 640 case NFS4_OPEN_CREATE: 641 READ_BUF(4); 642 READ32(open->op_createmode); 643 switch (open->op_createmode) { 644 case NFS4_CREATE_UNCHECKED: 645 case NFS4_CREATE_GUARDED: 646 status = nfsd4_decode_fattr(argp, open->op_bmval, 647 &open->op_iattr, &open->op_acl); 648 if (status) 649 goto out; 650 break; 651 case NFS4_CREATE_EXCLUSIVE: 652 READ_BUF(8); 653 COPYMEM(open->op_verf.data, 8); 654 break; 655 case NFS4_CREATE_EXCLUSIVE4_1: 656 if (argp->minorversion < 1) 657 goto xdr_error; 658 READ_BUF(8); 659 COPYMEM(open->op_verf.data, 8); 660 status = nfsd4_decode_fattr(argp, open->op_bmval, 661 &open->op_iattr, &open->op_acl); 662 if (status) 663 goto out; 664 break; 665 default: 666 goto xdr_error; 667 } 668 break; 669 default: 670 goto xdr_error; 671 } 672 673 /* open_claim */ 674 READ_BUF(4); 675 READ32(open->op_claim_type); 676 switch (open->op_claim_type) { 677 case NFS4_OPEN_CLAIM_NULL: 678 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 679 READ_BUF(4); 680 READ32(open->op_fname.len); 681 READ_BUF(open->op_fname.len); 682 SAVEMEM(open->op_fname.data, open->op_fname.len); 683 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 684 return status; 685 break; 686 case NFS4_OPEN_CLAIM_PREVIOUS: 687 READ_BUF(4); 688 READ32(open->op_delegate_type); 689 break; 690 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 691 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 692 if (status) 693 return status; 694 READ_BUF(4); 695 READ32(open->op_fname.len); 696 READ_BUF(open->op_fname.len); 697 SAVEMEM(open->op_fname.data, open->op_fname.len); 698 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 699 return status; 700 break; 701 default: 702 goto xdr_error; 703 } 704 705 DECODE_TAIL; 706 } 707 708 static __be32 709 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 710 { 711 DECODE_HEAD; 712 713 open_conf->oc_stateowner = NULL; 714 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 715 if (status) 716 return status; 717 READ_BUF(4); 718 READ32(open_conf->oc_seqid); 719 720 DECODE_TAIL; 721 } 722 723 static __be32 724 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 725 { 726 DECODE_HEAD; 727 728 open_down->od_stateowner = NULL; 729 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 730 if (status) 731 return status; 732 READ_BUF(12); 733 READ32(open_down->od_seqid); 734 READ32(open_down->od_share_access); 735 READ32(open_down->od_share_deny); 736 737 DECODE_TAIL; 738 } 739 740 static __be32 741 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 742 { 743 DECODE_HEAD; 744 745 READ_BUF(4); 746 READ32(putfh->pf_fhlen); 747 if (putfh->pf_fhlen > NFS4_FHSIZE) 748 goto xdr_error; 749 READ_BUF(putfh->pf_fhlen); 750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 751 752 DECODE_TAIL; 753 } 754 755 static __be32 756 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 757 { 758 DECODE_HEAD; 759 760 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 761 if (status) 762 return status; 763 READ_BUF(12); 764 READ64(read->rd_offset); 765 READ32(read->rd_length); 766 767 DECODE_TAIL; 768 } 769 770 static __be32 771 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 772 { 773 DECODE_HEAD; 774 775 READ_BUF(24); 776 READ64(readdir->rd_cookie); 777 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 778 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 779 READ32(readdir->rd_maxcount); 780 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 781 goto out; 782 783 DECODE_TAIL; 784 } 785 786 static __be32 787 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 788 { 789 DECODE_HEAD; 790 791 READ_BUF(4); 792 READ32(remove->rm_namelen); 793 READ_BUF(remove->rm_namelen); 794 SAVEMEM(remove->rm_name, remove->rm_namelen); 795 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 796 return status; 797 798 DECODE_TAIL; 799 } 800 801 static __be32 802 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 803 { 804 DECODE_HEAD; 805 806 READ_BUF(4); 807 READ32(rename->rn_snamelen); 808 READ_BUF(rename->rn_snamelen + 4); 809 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 810 READ32(rename->rn_tnamelen); 811 READ_BUF(rename->rn_tnamelen); 812 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 813 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 814 return status; 815 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 816 return status; 817 818 DECODE_TAIL; 819 } 820 821 static __be32 822 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 823 { 824 DECODE_HEAD; 825 826 READ_BUF(sizeof(clientid_t)); 827 COPYMEM(clientid, sizeof(clientid_t)); 828 829 DECODE_TAIL; 830 } 831 832 static __be32 833 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 834 struct nfsd4_secinfo *secinfo) 835 { 836 DECODE_HEAD; 837 838 READ_BUF(4); 839 READ32(secinfo->si_namelen); 840 READ_BUF(secinfo->si_namelen); 841 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 842 status = check_filename(secinfo->si_name, secinfo->si_namelen, 843 nfserr_noent); 844 if (status) 845 return status; 846 DECODE_TAIL; 847 } 848 849 static __be32 850 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 851 { 852 __be32 status; 853 854 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 855 if (status) 856 return status; 857 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 858 &setattr->sa_acl); 859 } 860 861 static __be32 862 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 863 { 864 DECODE_HEAD; 865 866 READ_BUF(12); 867 COPYMEM(setclientid->se_verf.data, 8); 868 READ32(setclientid->se_namelen); 869 870 READ_BUF(setclientid->se_namelen + 8); 871 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 872 READ32(setclientid->se_callback_prog); 873 READ32(setclientid->se_callback_netid_len); 874 875 READ_BUF(setclientid->se_callback_netid_len + 4); 876 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 877 READ32(setclientid->se_callback_addr_len); 878 879 READ_BUF(setclientid->se_callback_addr_len + 4); 880 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 881 READ32(setclientid->se_callback_ident); 882 883 DECODE_TAIL; 884 } 885 886 static __be32 887 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 888 { 889 DECODE_HEAD; 890 891 READ_BUF(8 + sizeof(nfs4_verifier)); 892 COPYMEM(&scd_c->sc_clientid, 8); 893 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 894 895 DECODE_TAIL; 896 } 897 898 /* Also used for NVERIFY */ 899 static __be32 900 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 901 { 902 #if 0 903 struct nfsd4_compoundargs save = { 904 .p = argp->p, 905 .end = argp->end, 906 .rqstp = argp->rqstp, 907 }; 908 u32 ve_bmval[2]; 909 struct iattr ve_iattr; /* request */ 910 struct nfs4_acl *ve_acl; /* request */ 911 #endif 912 DECODE_HEAD; 913 914 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 915 goto out; 916 917 /* For convenience's sake, we compare raw xdr'd attributes in 918 * nfsd4_proc_verify; however we still decode here just to return 919 * correct error in case of bad xdr. */ 920 #if 0 921 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 922 if (status == nfserr_inval) { 923 status = nfserrno(status); 924 goto out; 925 } 926 #endif 927 READ_BUF(4); 928 READ32(verify->ve_attrlen); 929 READ_BUF(verify->ve_attrlen); 930 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 931 932 DECODE_TAIL; 933 } 934 935 static __be32 936 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 937 { 938 int avail; 939 int v; 940 int len; 941 DECODE_HEAD; 942 943 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 944 if (status) 945 return status; 946 READ_BUF(16); 947 READ64(write->wr_offset); 948 READ32(write->wr_stable_how); 949 if (write->wr_stable_how > 2) 950 goto xdr_error; 951 READ32(write->wr_buflen); 952 953 /* Sorry .. no magic macros for this.. * 954 * READ_BUF(write->wr_buflen); 955 * SAVEMEM(write->wr_buf, write->wr_buflen); 956 */ 957 avail = (char*)argp->end - (char*)argp->p; 958 if (avail + argp->pagelen < write->wr_buflen) { 959 dprintk("NFSD: xdr error (%s:%d)\n", 960 __FILE__, __LINE__); 961 goto xdr_error; 962 } 963 argp->rqstp->rq_vec[0].iov_base = p; 964 argp->rqstp->rq_vec[0].iov_len = avail; 965 v = 0; 966 len = write->wr_buflen; 967 while (len > argp->rqstp->rq_vec[v].iov_len) { 968 len -= argp->rqstp->rq_vec[v].iov_len; 969 v++; 970 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 971 argp->pagelist++; 972 if (argp->pagelen >= PAGE_SIZE) { 973 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 974 argp->pagelen -= PAGE_SIZE; 975 } else { 976 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 977 argp->pagelen -= len; 978 } 979 } 980 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 981 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 982 argp->rqstp->rq_vec[v].iov_len = len; 983 write->wr_vlen = v+1; 984 985 DECODE_TAIL; 986 } 987 988 static __be32 989 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 990 { 991 DECODE_HEAD; 992 993 READ_BUF(12); 994 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 995 READ32(rlockowner->rl_owner.len); 996 READ_BUF(rlockowner->rl_owner.len); 997 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 998 999 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1000 return nfserr_inval; 1001 DECODE_TAIL; 1002 } 1003 1004 static __be32 1005 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1006 struct nfsd4_exchange_id *exid) 1007 { 1008 int dummy; 1009 DECODE_HEAD; 1010 1011 READ_BUF(NFS4_VERIFIER_SIZE); 1012 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1013 1014 READ_BUF(4); 1015 READ32(exid->clname.len); 1016 1017 READ_BUF(exid->clname.len); 1018 SAVEMEM(exid->clname.data, exid->clname.len); 1019 1020 READ_BUF(4); 1021 READ32(exid->flags); 1022 1023 /* Ignore state_protect4_a */ 1024 READ_BUF(4); 1025 READ32(exid->spa_how); 1026 switch (exid->spa_how) { 1027 case SP4_NONE: 1028 break; 1029 case SP4_MACH_CRED: 1030 /* spo_must_enforce */ 1031 READ_BUF(4); 1032 READ32(dummy); 1033 READ_BUF(dummy * 4); 1034 p += dummy; 1035 1036 /* spo_must_allow */ 1037 READ_BUF(4); 1038 READ32(dummy); 1039 READ_BUF(dummy * 4); 1040 p += dummy; 1041 break; 1042 case SP4_SSV: 1043 /* ssp_ops */ 1044 READ_BUF(4); 1045 READ32(dummy); 1046 READ_BUF(dummy * 4); 1047 p += dummy; 1048 1049 READ_BUF(4); 1050 READ32(dummy); 1051 READ_BUF(dummy * 4); 1052 p += dummy; 1053 1054 /* ssp_hash_algs<> */ 1055 READ_BUF(4); 1056 READ32(dummy); 1057 READ_BUF(dummy); 1058 p += XDR_QUADLEN(dummy); 1059 1060 /* ssp_encr_algs<> */ 1061 READ_BUF(4); 1062 READ32(dummy); 1063 READ_BUF(dummy); 1064 p += XDR_QUADLEN(dummy); 1065 1066 /* ssp_window and ssp_num_gss_handles */ 1067 READ_BUF(8); 1068 READ32(dummy); 1069 READ32(dummy); 1070 break; 1071 default: 1072 goto xdr_error; 1073 } 1074 1075 /* Ignore Implementation ID */ 1076 READ_BUF(4); /* nfs_impl_id4 array length */ 1077 READ32(dummy); 1078 1079 if (dummy > 1) 1080 goto xdr_error; 1081 1082 if (dummy == 1) { 1083 /* nii_domain */ 1084 READ_BUF(4); 1085 READ32(dummy); 1086 READ_BUF(dummy); 1087 p += XDR_QUADLEN(dummy); 1088 1089 /* nii_name */ 1090 READ_BUF(4); 1091 READ32(dummy); 1092 READ_BUF(dummy); 1093 p += XDR_QUADLEN(dummy); 1094 1095 /* nii_date */ 1096 READ_BUF(12); 1097 p += 3; 1098 } 1099 DECODE_TAIL; 1100 } 1101 1102 static __be32 1103 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1104 struct nfsd4_create_session *sess) 1105 { 1106 DECODE_HEAD; 1107 1108 u32 dummy; 1109 char *machine_name; 1110 int i; 1111 int nr_secflavs; 1112 1113 READ_BUF(16); 1114 COPYMEM(&sess->clientid, 8); 1115 READ32(sess->seqid); 1116 READ32(sess->flags); 1117 1118 /* Fore channel attrs */ 1119 READ_BUF(28); 1120 READ32(dummy); /* headerpadsz is always 0 */ 1121 READ32(sess->fore_channel.maxreq_sz); 1122 READ32(sess->fore_channel.maxresp_sz); 1123 READ32(sess->fore_channel.maxresp_cached); 1124 READ32(sess->fore_channel.maxops); 1125 READ32(sess->fore_channel.maxreqs); 1126 READ32(sess->fore_channel.nr_rdma_attrs); 1127 if (sess->fore_channel.nr_rdma_attrs == 1) { 1128 READ_BUF(4); 1129 READ32(sess->fore_channel.rdma_attrs); 1130 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1131 dprintk("Too many fore channel attr bitmaps!\n"); 1132 goto xdr_error; 1133 } 1134 1135 /* Back channel attrs */ 1136 READ_BUF(28); 1137 READ32(dummy); /* headerpadsz is always 0 */ 1138 READ32(sess->back_channel.maxreq_sz); 1139 READ32(sess->back_channel.maxresp_sz); 1140 READ32(sess->back_channel.maxresp_cached); 1141 READ32(sess->back_channel.maxops); 1142 READ32(sess->back_channel.maxreqs); 1143 READ32(sess->back_channel.nr_rdma_attrs); 1144 if (sess->back_channel.nr_rdma_attrs == 1) { 1145 READ_BUF(4); 1146 READ32(sess->back_channel.rdma_attrs); 1147 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1148 dprintk("Too many back channel attr bitmaps!\n"); 1149 goto xdr_error; 1150 } 1151 1152 READ_BUF(8); 1153 READ32(sess->callback_prog); 1154 1155 /* callback_sec_params4 */ 1156 READ32(nr_secflavs); 1157 for (i = 0; i < nr_secflavs; ++i) { 1158 READ_BUF(4); 1159 READ32(dummy); 1160 switch (dummy) { 1161 case RPC_AUTH_NULL: 1162 /* Nothing to read */ 1163 break; 1164 case RPC_AUTH_UNIX: 1165 READ_BUF(8); 1166 /* stamp */ 1167 READ32(dummy); 1168 1169 /* machine name */ 1170 READ32(dummy); 1171 READ_BUF(dummy); 1172 SAVEMEM(machine_name, dummy); 1173 1174 /* uid, gid */ 1175 READ_BUF(8); 1176 READ32(sess->uid); 1177 READ32(sess->gid); 1178 1179 /* more gids */ 1180 READ_BUF(4); 1181 READ32(dummy); 1182 READ_BUF(dummy * 4); 1183 for (i = 0; i < dummy; ++i) 1184 READ32(dummy); 1185 break; 1186 case RPC_AUTH_GSS: 1187 dprintk("RPC_AUTH_GSS callback secflavor " 1188 "not supported!\n"); 1189 READ_BUF(8); 1190 /* gcbp_service */ 1191 READ32(dummy); 1192 /* gcbp_handle_from_server */ 1193 READ32(dummy); 1194 READ_BUF(dummy); 1195 p += XDR_QUADLEN(dummy); 1196 /* gcbp_handle_from_client */ 1197 READ_BUF(4); 1198 READ32(dummy); 1199 READ_BUF(dummy); 1200 p += XDR_QUADLEN(dummy); 1201 break; 1202 default: 1203 dprintk("Illegal callback secflavor\n"); 1204 return nfserr_inval; 1205 } 1206 } 1207 DECODE_TAIL; 1208 } 1209 1210 static __be32 1211 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1212 struct nfsd4_destroy_session *destroy_session) 1213 { 1214 DECODE_HEAD; 1215 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1216 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1217 1218 DECODE_TAIL; 1219 } 1220 1221 static __be32 1222 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1223 struct nfsd4_sequence *seq) 1224 { 1225 DECODE_HEAD; 1226 1227 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1228 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1229 READ32(seq->seqid); 1230 READ32(seq->slotid); 1231 READ32(seq->maxslots); 1232 READ32(seq->cachethis); 1233 1234 DECODE_TAIL; 1235 } 1236 1237 static __be32 1238 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1239 { 1240 return nfs_ok; 1241 } 1242 1243 static __be32 1244 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1245 { 1246 return nfserr_notsupp; 1247 } 1248 1249 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1250 1251 static nfsd4_dec nfsd4_dec_ops[] = { 1252 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1253 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1254 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1255 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1256 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1257 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1258 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1259 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1260 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1261 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1262 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1263 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1264 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1265 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1266 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1267 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1268 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1269 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1270 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1271 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1272 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1273 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1274 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1275 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1276 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1277 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1278 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1279 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1280 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1281 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1282 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1283 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1284 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1285 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1286 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1287 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1288 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1289 }; 1290 1291 static nfsd4_dec nfsd41_dec_ops[] = { 1292 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1293 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1294 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1295 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1296 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1297 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1298 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1299 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1300 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1301 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1302 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1303 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1304 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1305 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1306 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1307 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1308 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1309 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1310 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1311 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1312 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1313 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1314 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1315 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1316 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1317 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1318 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1319 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1320 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1321 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1322 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1323 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1324 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1325 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1326 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1327 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1328 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1329 1330 /* new operations for NFSv4.1 */ 1331 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1332 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp, 1333 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1334 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1335 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1336 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1337 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1338 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1339 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1340 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1341 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1342 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1343 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1344 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1345 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1346 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1347 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1348 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1349 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp, 1350 }; 1351 1352 struct nfsd4_minorversion_ops { 1353 nfsd4_dec *decoders; 1354 int nops; 1355 }; 1356 1357 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1358 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1359 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1360 }; 1361 1362 static __be32 1363 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1364 { 1365 DECODE_HEAD; 1366 struct nfsd4_op *op; 1367 struct nfsd4_minorversion_ops *ops; 1368 int i; 1369 1370 /* 1371 * XXX: According to spec, we should check the tag 1372 * for UTF-8 compliance. I'm postponing this for 1373 * now because it seems that some clients do use 1374 * binary tags. 1375 */ 1376 READ_BUF(4); 1377 READ32(argp->taglen); 1378 READ_BUF(argp->taglen + 8); 1379 SAVEMEM(argp->tag, argp->taglen); 1380 READ32(argp->minorversion); 1381 READ32(argp->opcnt); 1382 1383 if (argp->taglen > NFSD4_MAX_TAGLEN) 1384 goto xdr_error; 1385 if (argp->opcnt > 100) 1386 goto xdr_error; 1387 1388 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1389 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1390 if (!argp->ops) { 1391 argp->ops = argp->iops; 1392 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1393 goto xdr_error; 1394 } 1395 } 1396 1397 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1398 argp->opcnt = 0; 1399 1400 ops = &nfsd4_minorversion[argp->minorversion]; 1401 for (i = 0; i < argp->opcnt; i++) { 1402 op = &argp->ops[i]; 1403 op->replay = NULL; 1404 1405 /* 1406 * We can't use READ_BUF() here because we need to handle 1407 * a missing opcode as an OP_WRITE + 1. So we need to check 1408 * to see if we're truly at the end of our buffer or if there 1409 * is another page we need to flip to. 1410 */ 1411 1412 if (argp->p == argp->end) { 1413 if (argp->pagelen < 4) { 1414 /* There isn't an opcode still on the wire */ 1415 op->opnum = OP_WRITE + 1; 1416 op->status = nfserr_bad_xdr; 1417 argp->opcnt = i+1; 1418 break; 1419 } 1420 1421 /* 1422 * False alarm. We just hit a page boundary, but there 1423 * is still data available. Move pointer across page 1424 * boundary. *snip from READ_BUF* 1425 */ 1426 argp->p = page_address(argp->pagelist[0]); 1427 argp->pagelist++; 1428 if (argp->pagelen < PAGE_SIZE) { 1429 argp->end = p + (argp->pagelen>>2); 1430 argp->pagelen = 0; 1431 } else { 1432 argp->end = p + (PAGE_SIZE>>2); 1433 argp->pagelen -= PAGE_SIZE; 1434 } 1435 } 1436 op->opnum = ntohl(*argp->p++); 1437 1438 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1439 op->status = ops->decoders[op->opnum](argp, &op->u); 1440 else { 1441 op->opnum = OP_ILLEGAL; 1442 op->status = nfserr_op_illegal; 1443 } 1444 1445 if (op->status) { 1446 argp->opcnt = i+1; 1447 break; 1448 } 1449 } 1450 1451 DECODE_TAIL; 1452 } 1453 1454 #define WRITE32(n) *p++ = htonl(n) 1455 #define WRITE64(n) do { \ 1456 *p++ = htonl((u32)((n) >> 32)); \ 1457 *p++ = htonl((u32)(n)); \ 1458 } while (0) 1459 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1460 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1461 memcpy(p, ptr, nbytes); \ 1462 p += XDR_QUADLEN(nbytes); \ 1463 }} while (0) 1464 1465 static void write32(__be32 **p, u32 n) 1466 { 1467 *(*p)++ = n; 1468 } 1469 1470 static void write64(__be32 **p, u64 n) 1471 { 1472 write32(p, (u32)(n >> 32)); 1473 write32(p, (u32)n); 1474 } 1475 1476 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1477 { 1478 if (IS_I_VERSION(inode)) { 1479 write64(p, inode->i_version); 1480 } else { 1481 write32(p, stat->ctime.tv_sec); 1482 write32(p, stat->ctime.tv_nsec); 1483 } 1484 } 1485 1486 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1487 { 1488 write32(p, c->atomic); 1489 if (c->change_supported) { 1490 write64(p, c->before_change); 1491 write64(p, c->after_change); 1492 } else { 1493 write32(p, c->before_ctime_sec); 1494 write32(p, c->before_ctime_nsec); 1495 write32(p, c->after_ctime_sec); 1496 write32(p, c->after_ctime_nsec); 1497 } 1498 } 1499 1500 #define RESERVE_SPACE(nbytes) do { \ 1501 p = resp->p; \ 1502 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1503 } while (0) 1504 #define ADJUST_ARGS() resp->p = p 1505 1506 /* 1507 * Header routine to setup seqid operation replay cache 1508 */ 1509 #define ENCODE_SEQID_OP_HEAD \ 1510 __be32 *save; \ 1511 \ 1512 save = resp->p; 1513 1514 /* 1515 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1516 * is where sequence id's are incremented, and the replay cache is filled. 1517 * Note that we increment sequence id's here, at the last moment, so we're sure 1518 * we know whether the error to be returned is a sequence id mutating error. 1519 */ 1520 1521 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1522 if (seqid_mutating_err(nfserr) && stateowner) { \ 1523 stateowner->so_seqid++; \ 1524 stateowner->so_replay.rp_status = nfserr; \ 1525 stateowner->so_replay.rp_buflen = \ 1526 (((char *)(resp)->p - (char *)save)); \ 1527 memcpy(stateowner->so_replay.rp_buf, save, \ 1528 stateowner->so_replay.rp_buflen); \ 1529 } } while (0); 1530 1531 /* Encode as an array of strings the string given with components 1532 * separated @sep. 1533 */ 1534 static __be32 nfsd4_encode_components(char sep, char *components, 1535 __be32 **pp, int *buflen) 1536 { 1537 __be32 *p = *pp; 1538 __be32 *countp = p; 1539 int strlen, count=0; 1540 char *str, *end; 1541 1542 dprintk("nfsd4_encode_components(%s)\n", components); 1543 if ((*buflen -= 4) < 0) 1544 return nfserr_resource; 1545 WRITE32(0); /* We will fill this in with @count later */ 1546 end = str = components; 1547 while (*end) { 1548 for (; *end && (*end != sep); end++) 1549 ; /* Point to end of component */ 1550 strlen = end - str; 1551 if (strlen) { 1552 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1553 return nfserr_resource; 1554 WRITE32(strlen); 1555 WRITEMEM(str, strlen); 1556 count++; 1557 } 1558 else 1559 end++; 1560 str = end; 1561 } 1562 *pp = p; 1563 p = countp; 1564 WRITE32(count); 1565 return 0; 1566 } 1567 1568 /* 1569 * encode a location element of a fs_locations structure 1570 */ 1571 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1572 __be32 **pp, int *buflen) 1573 { 1574 __be32 status; 1575 __be32 *p = *pp; 1576 1577 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1578 if (status) 1579 return status; 1580 status = nfsd4_encode_components('/', location->path, &p, buflen); 1581 if (status) 1582 return status; 1583 *pp = p; 1584 return 0; 1585 } 1586 1587 /* 1588 * Return the path to an export point in the pseudo filesystem namespace 1589 * Returned string is safe to use as long as the caller holds a reference 1590 * to @exp. 1591 */ 1592 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1593 { 1594 struct svc_fh tmp_fh; 1595 char *path = NULL, *rootpath; 1596 size_t rootlen; 1597 1598 fh_init(&tmp_fh, NFS4_FHSIZE); 1599 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1600 if (*stat) 1601 return NULL; 1602 rootpath = tmp_fh.fh_export->ex_pathname; 1603 1604 path = exp->ex_pathname; 1605 1606 rootlen = strlen(rootpath); 1607 if (strncmp(path, rootpath, rootlen)) { 1608 dprintk("nfsd: fs_locations failed;" 1609 "%s is not contained in %s\n", path, rootpath); 1610 *stat = nfserr_notsupp; 1611 path = NULL; 1612 goto out; 1613 } 1614 path += rootlen; 1615 out: 1616 fh_put(&tmp_fh); 1617 return path; 1618 } 1619 1620 /* 1621 * encode a fs_locations structure 1622 */ 1623 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1624 struct svc_export *exp, 1625 __be32 **pp, int *buflen) 1626 { 1627 __be32 status; 1628 int i; 1629 __be32 *p = *pp; 1630 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1631 char *root = nfsd4_path(rqstp, exp, &status); 1632 1633 if (status) 1634 return status; 1635 status = nfsd4_encode_components('/', root, &p, buflen); 1636 if (status) 1637 return status; 1638 if ((*buflen -= 4) < 0) 1639 return nfserr_resource; 1640 WRITE32(fslocs->locations_count); 1641 for (i=0; i<fslocs->locations_count; i++) { 1642 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1643 &p, buflen); 1644 if (status) 1645 return status; 1646 } 1647 *pp = p; 1648 return 0; 1649 } 1650 1651 static u32 nfs4_ftypes[16] = { 1652 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1653 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1654 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1655 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1656 }; 1657 1658 static __be32 1659 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1660 __be32 **p, int *buflen) 1661 { 1662 int status; 1663 1664 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1665 return nfserr_resource; 1666 if (whotype != NFS4_ACL_WHO_NAMED) 1667 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1668 else if (group) 1669 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1670 else 1671 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1672 if (status < 0) 1673 return nfserrno(status); 1674 *p = xdr_encode_opaque(*p, NULL, status); 1675 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1676 BUG_ON(*buflen < 0); 1677 return 0; 1678 } 1679 1680 static inline __be32 1681 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1682 { 1683 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1684 } 1685 1686 static inline __be32 1687 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1688 { 1689 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1690 } 1691 1692 static inline __be32 1693 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1694 __be32 **p, int *buflen) 1695 { 1696 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1697 } 1698 1699 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1700 FATTR4_WORD0_RDATTR_ERROR) 1701 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1702 1703 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1704 { 1705 /* As per referral draft: */ 1706 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1707 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1708 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1709 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1710 *rdattr_err = NFSERR_MOVED; 1711 else 1712 return nfserr_moved; 1713 } 1714 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1715 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1716 return 0; 1717 } 1718 1719 /* 1720 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1721 * ourselves. 1722 * 1723 * @countp is the buffer size in _words_; upon successful return this becomes 1724 * replaced with the number of words written. 1725 */ 1726 __be32 1727 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1728 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1729 struct svc_rqst *rqstp, int ignore_crossmnt) 1730 { 1731 u32 bmval0 = bmval[0]; 1732 u32 bmval1 = bmval[1]; 1733 u32 bmval2 = bmval[2]; 1734 struct kstat stat; 1735 struct svc_fh tempfh; 1736 struct kstatfs statfs; 1737 int buflen = *countp << 2; 1738 __be32 *attrlenp; 1739 u32 dummy; 1740 u64 dummy64; 1741 u32 rdattr_err = 0; 1742 __be32 *p = buffer; 1743 __be32 status; 1744 int err; 1745 int aclsupport = 0; 1746 struct nfs4_acl *acl = NULL; 1747 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1748 u32 minorversion = resp->cstate.minorversion; 1749 1750 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1751 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 1752 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 1753 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 1754 1755 if (exp->ex_fslocs.migrated) { 1756 BUG_ON(bmval[2]); 1757 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1758 if (status) 1759 goto out; 1760 } 1761 1762 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1763 if (err) 1764 goto out_nfserr; 1765 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1766 FATTR4_WORD0_MAXNAME)) || 1767 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1768 FATTR4_WORD1_SPACE_TOTAL))) { 1769 err = vfs_statfs(dentry, &statfs); 1770 if (err) 1771 goto out_nfserr; 1772 } 1773 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1774 fh_init(&tempfh, NFS4_FHSIZE); 1775 status = fh_compose(&tempfh, exp, dentry, NULL); 1776 if (status) 1777 goto out; 1778 fhp = &tempfh; 1779 } 1780 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1781 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1782 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1783 aclsupport = (err == 0); 1784 if (bmval0 & FATTR4_WORD0_ACL) { 1785 if (err == -EOPNOTSUPP) 1786 bmval0 &= ~FATTR4_WORD0_ACL; 1787 else if (err == -EINVAL) { 1788 status = nfserr_attrnotsupp; 1789 goto out; 1790 } else if (err != 0) 1791 goto out_nfserr; 1792 } 1793 } 1794 if ((buflen -= 16) < 0) 1795 goto out_resource; 1796 1797 if (unlikely(bmval2)) { 1798 WRITE32(3); 1799 WRITE32(bmval0); 1800 WRITE32(bmval1); 1801 WRITE32(bmval2); 1802 } else if (likely(bmval1)) { 1803 WRITE32(2); 1804 WRITE32(bmval0); 1805 WRITE32(bmval1); 1806 } else { 1807 WRITE32(1); 1808 WRITE32(bmval0); 1809 } 1810 attrlenp = p++; /* to be backfilled later */ 1811 1812 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1813 u32 word0 = nfsd_suppattrs0(minorversion); 1814 u32 word1 = nfsd_suppattrs1(minorversion); 1815 u32 word2 = nfsd_suppattrs2(minorversion); 1816 1817 if ((buflen -= 12) < 0) 1818 goto out_resource; 1819 if (!aclsupport) 1820 word0 &= ~FATTR4_WORD0_ACL; 1821 if (!word2) { 1822 WRITE32(2); 1823 WRITE32(word0); 1824 WRITE32(word1); 1825 } else { 1826 WRITE32(3); 1827 WRITE32(word0); 1828 WRITE32(word1); 1829 WRITE32(word2); 1830 } 1831 } 1832 if (bmval0 & FATTR4_WORD0_TYPE) { 1833 if ((buflen -= 4) < 0) 1834 goto out_resource; 1835 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1836 if (dummy == NF4BAD) 1837 goto out_serverfault; 1838 WRITE32(dummy); 1839 } 1840 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1841 if ((buflen -= 4) < 0) 1842 goto out_resource; 1843 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1844 WRITE32(NFS4_FH_PERSISTENT); 1845 else 1846 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1847 } 1848 if (bmval0 & FATTR4_WORD0_CHANGE) { 1849 if ((buflen -= 8) < 0) 1850 goto out_resource; 1851 write_change(&p, &stat, dentry->d_inode); 1852 } 1853 if (bmval0 & FATTR4_WORD0_SIZE) { 1854 if ((buflen -= 8) < 0) 1855 goto out_resource; 1856 WRITE64(stat.size); 1857 } 1858 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1859 if ((buflen -= 4) < 0) 1860 goto out_resource; 1861 WRITE32(1); 1862 } 1863 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1864 if ((buflen -= 4) < 0) 1865 goto out_resource; 1866 WRITE32(1); 1867 } 1868 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1869 if ((buflen -= 4) < 0) 1870 goto out_resource; 1871 WRITE32(0); 1872 } 1873 if (bmval0 & FATTR4_WORD0_FSID) { 1874 if ((buflen -= 16) < 0) 1875 goto out_resource; 1876 if (exp->ex_fslocs.migrated) { 1877 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1878 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1879 } else switch(fsid_source(fhp)) { 1880 case FSIDSOURCE_FSID: 1881 WRITE64((u64)exp->ex_fsid); 1882 WRITE64((u64)0); 1883 break; 1884 case FSIDSOURCE_DEV: 1885 WRITE32(0); 1886 WRITE32(MAJOR(stat.dev)); 1887 WRITE32(0); 1888 WRITE32(MINOR(stat.dev)); 1889 break; 1890 case FSIDSOURCE_UUID: 1891 WRITEMEM(exp->ex_uuid, 16); 1892 break; 1893 } 1894 } 1895 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1896 if ((buflen -= 4) < 0) 1897 goto out_resource; 1898 WRITE32(0); 1899 } 1900 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1901 if ((buflen -= 4) < 0) 1902 goto out_resource; 1903 WRITE32(NFSD_LEASE_TIME); 1904 } 1905 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1906 if ((buflen -= 4) < 0) 1907 goto out_resource; 1908 WRITE32(rdattr_err); 1909 } 1910 if (bmval0 & FATTR4_WORD0_ACL) { 1911 struct nfs4_ace *ace; 1912 1913 if (acl == NULL) { 1914 if ((buflen -= 4) < 0) 1915 goto out_resource; 1916 1917 WRITE32(0); 1918 goto out_acl; 1919 } 1920 if ((buflen -= 4) < 0) 1921 goto out_resource; 1922 WRITE32(acl->naces); 1923 1924 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1925 if ((buflen -= 4*3) < 0) 1926 goto out_resource; 1927 WRITE32(ace->type); 1928 WRITE32(ace->flag); 1929 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1930 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1931 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1932 &p, &buflen); 1933 if (status == nfserr_resource) 1934 goto out_resource; 1935 if (status) 1936 goto out; 1937 } 1938 } 1939 out_acl: 1940 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1941 if ((buflen -= 4) < 0) 1942 goto out_resource; 1943 WRITE32(aclsupport ? 1944 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1945 } 1946 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1947 if ((buflen -= 4) < 0) 1948 goto out_resource; 1949 WRITE32(1); 1950 } 1951 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1952 if ((buflen -= 4) < 0) 1953 goto out_resource; 1954 WRITE32(1); 1955 } 1956 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1957 if ((buflen -= 4) < 0) 1958 goto out_resource; 1959 WRITE32(1); 1960 } 1961 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1962 if ((buflen -= 4) < 0) 1963 goto out_resource; 1964 WRITE32(1); 1965 } 1966 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1967 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1968 if (buflen < 0) 1969 goto out_resource; 1970 WRITE32(fhp->fh_handle.fh_size); 1971 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1972 } 1973 if (bmval0 & FATTR4_WORD0_FILEID) { 1974 if ((buflen -= 8) < 0) 1975 goto out_resource; 1976 WRITE64(stat.ino); 1977 } 1978 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1979 if ((buflen -= 8) < 0) 1980 goto out_resource; 1981 WRITE64((u64) statfs.f_ffree); 1982 } 1983 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1984 if ((buflen -= 8) < 0) 1985 goto out_resource; 1986 WRITE64((u64) statfs.f_ffree); 1987 } 1988 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1989 if ((buflen -= 8) < 0) 1990 goto out_resource; 1991 WRITE64((u64) statfs.f_files); 1992 } 1993 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1994 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1995 if (status == nfserr_resource) 1996 goto out_resource; 1997 if (status) 1998 goto out; 1999 } 2000 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2001 if ((buflen -= 4) < 0) 2002 goto out_resource; 2003 WRITE32(1); 2004 } 2005 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2006 if ((buflen -= 8) < 0) 2007 goto out_resource; 2008 WRITE64(~(u64)0); 2009 } 2010 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2011 if ((buflen -= 4) < 0) 2012 goto out_resource; 2013 WRITE32(255); 2014 } 2015 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2016 if ((buflen -= 4) < 0) 2017 goto out_resource; 2018 WRITE32(statfs.f_namelen); 2019 } 2020 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2021 if ((buflen -= 8) < 0) 2022 goto out_resource; 2023 WRITE64((u64) svc_max_payload(rqstp)); 2024 } 2025 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2026 if ((buflen -= 8) < 0) 2027 goto out_resource; 2028 WRITE64((u64) svc_max_payload(rqstp)); 2029 } 2030 if (bmval1 & FATTR4_WORD1_MODE) { 2031 if ((buflen -= 4) < 0) 2032 goto out_resource; 2033 WRITE32(stat.mode & S_IALLUGO); 2034 } 2035 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2036 if ((buflen -= 4) < 0) 2037 goto out_resource; 2038 WRITE32(1); 2039 } 2040 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2041 if ((buflen -= 4) < 0) 2042 goto out_resource; 2043 WRITE32(stat.nlink); 2044 } 2045 if (bmval1 & FATTR4_WORD1_OWNER) { 2046 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2047 if (status == nfserr_resource) 2048 goto out_resource; 2049 if (status) 2050 goto out; 2051 } 2052 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2053 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2054 if (status == nfserr_resource) 2055 goto out_resource; 2056 if (status) 2057 goto out; 2058 } 2059 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2060 if ((buflen -= 8) < 0) 2061 goto out_resource; 2062 WRITE32((u32) MAJOR(stat.rdev)); 2063 WRITE32((u32) MINOR(stat.rdev)); 2064 } 2065 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2066 if ((buflen -= 8) < 0) 2067 goto out_resource; 2068 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2069 WRITE64(dummy64); 2070 } 2071 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2072 if ((buflen -= 8) < 0) 2073 goto out_resource; 2074 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2075 WRITE64(dummy64); 2076 } 2077 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2078 if ((buflen -= 8) < 0) 2079 goto out_resource; 2080 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2081 WRITE64(dummy64); 2082 } 2083 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2084 if ((buflen -= 8) < 0) 2085 goto out_resource; 2086 dummy64 = (u64)stat.blocks << 9; 2087 WRITE64(dummy64); 2088 } 2089 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2090 if ((buflen -= 12) < 0) 2091 goto out_resource; 2092 WRITE32(0); 2093 WRITE32(stat.atime.tv_sec); 2094 WRITE32(stat.atime.tv_nsec); 2095 } 2096 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2097 if ((buflen -= 12) < 0) 2098 goto out_resource; 2099 WRITE32(0); 2100 WRITE32(1); 2101 WRITE32(0); 2102 } 2103 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2104 if ((buflen -= 12) < 0) 2105 goto out_resource; 2106 WRITE32(0); 2107 WRITE32(stat.ctime.tv_sec); 2108 WRITE32(stat.ctime.tv_nsec); 2109 } 2110 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2111 if ((buflen -= 12) < 0) 2112 goto out_resource; 2113 WRITE32(0); 2114 WRITE32(stat.mtime.tv_sec); 2115 WRITE32(stat.mtime.tv_nsec); 2116 } 2117 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2118 if ((buflen -= 8) < 0) 2119 goto out_resource; 2120 /* 2121 * Get parent's attributes if not ignoring crossmount 2122 * and this is the root of a cross-mounted filesystem. 2123 */ 2124 if (ignore_crossmnt == 0 && 2125 dentry == exp->ex_path.mnt->mnt_root) { 2126 struct path path = exp->ex_path; 2127 path_get(&path); 2128 while (follow_up(&path)) { 2129 if (path.dentry != path.mnt->mnt_root) 2130 break; 2131 } 2132 err = vfs_getattr(path.mnt, path.dentry, &stat); 2133 path_put(&path); 2134 if (err) 2135 goto out_nfserr; 2136 } 2137 WRITE64(stat.ino); 2138 } 2139 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2140 WRITE32(3); 2141 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2142 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2143 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2144 } 2145 2146 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2147 *countp = p - buffer; 2148 status = nfs_ok; 2149 2150 out: 2151 kfree(acl); 2152 if (fhp == &tempfh) 2153 fh_put(&tempfh); 2154 return status; 2155 out_nfserr: 2156 status = nfserrno(err); 2157 goto out; 2158 out_resource: 2159 *countp = 0; 2160 status = nfserr_resource; 2161 goto out; 2162 out_serverfault: 2163 status = nfserr_serverfault; 2164 goto out; 2165 } 2166 2167 static inline int attributes_need_mount(u32 *bmval) 2168 { 2169 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2170 return 1; 2171 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2172 return 1; 2173 return 0; 2174 } 2175 2176 static __be32 2177 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2178 const char *name, int namlen, __be32 *p, int *buflen) 2179 { 2180 struct svc_export *exp = cd->rd_fhp->fh_export; 2181 struct dentry *dentry; 2182 __be32 nfserr; 2183 int ignore_crossmnt = 0; 2184 2185 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2186 if (IS_ERR(dentry)) 2187 return nfserrno(PTR_ERR(dentry)); 2188 if (!dentry->d_inode) { 2189 /* 2190 * nfsd_buffered_readdir drops the i_mutex between 2191 * readdir and calling this callback, leaving a window 2192 * where this directory entry could have gone away. 2193 */ 2194 dput(dentry); 2195 return nfserr_noent; 2196 } 2197 2198 exp_get(exp); 2199 /* 2200 * In the case of a mountpoint, the client may be asking for 2201 * attributes that are only properties of the underlying filesystem 2202 * as opposed to the cross-mounted file system. In such a case, 2203 * we will not follow the cross mount and will fill the attribtutes 2204 * directly from the mountpoint dentry. 2205 */ 2206 if (nfsd_mountpoint(dentry, exp)) { 2207 int err; 2208 2209 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2210 && !attributes_need_mount(cd->rd_bmval)) { 2211 ignore_crossmnt = 1; 2212 goto out_encode; 2213 } 2214 /* 2215 * Why the heck aren't we just using nfsd_lookup?? 2216 * Different "."/".." handling? Something else? 2217 * At least, add a comment here to explain.... 2218 */ 2219 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2220 if (err) { 2221 nfserr = nfserrno(err); 2222 goto out_put; 2223 } 2224 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2225 if (nfserr) 2226 goto out_put; 2227 2228 } 2229 out_encode: 2230 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2231 cd->rd_rqstp, ignore_crossmnt); 2232 out_put: 2233 dput(dentry); 2234 exp_put(exp); 2235 return nfserr; 2236 } 2237 2238 static __be32 * 2239 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2240 { 2241 __be32 *attrlenp; 2242 2243 if (buflen < 6) 2244 return NULL; 2245 *p++ = htonl(2); 2246 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2247 *p++ = htonl(0); /* bmval1 */ 2248 2249 attrlenp = p++; 2250 *p++ = nfserr; /* no htonl */ 2251 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2252 return p; 2253 } 2254 2255 static int 2256 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2257 loff_t offset, u64 ino, unsigned int d_type) 2258 { 2259 struct readdir_cd *ccd = ccdv; 2260 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2261 int buflen; 2262 __be32 *p = cd->buffer; 2263 __be32 *cookiep; 2264 __be32 nfserr = nfserr_toosmall; 2265 2266 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2267 if (name && isdotent(name, namlen)) { 2268 cd->common.err = nfs_ok; 2269 return 0; 2270 } 2271 2272 if (cd->offset) 2273 xdr_encode_hyper(cd->offset, (u64) offset); 2274 2275 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2276 if (buflen < 0) 2277 goto fail; 2278 2279 *p++ = xdr_one; /* mark entry present */ 2280 cookiep = p; 2281 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2282 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2283 2284 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2285 switch (nfserr) { 2286 case nfs_ok: 2287 p += buflen; 2288 break; 2289 case nfserr_resource: 2290 nfserr = nfserr_toosmall; 2291 goto fail; 2292 case nfserr_dropit: 2293 goto fail; 2294 case nfserr_noent: 2295 goto skip_entry; 2296 default: 2297 /* 2298 * If the client requested the RDATTR_ERROR attribute, 2299 * we stuff the error code into this attribute 2300 * and continue. If this attribute was not requested, 2301 * then in accordance with the spec, we fail the 2302 * entire READDIR operation(!) 2303 */ 2304 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2305 goto fail; 2306 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2307 if (p == NULL) { 2308 nfserr = nfserr_toosmall; 2309 goto fail; 2310 } 2311 } 2312 cd->buflen -= (p - cd->buffer); 2313 cd->buffer = p; 2314 cd->offset = cookiep; 2315 skip_entry: 2316 cd->common.err = nfs_ok; 2317 return 0; 2318 fail: 2319 cd->common.err = nfserr; 2320 return -EINVAL; 2321 } 2322 2323 static void 2324 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2325 { 2326 __be32 *p; 2327 2328 RESERVE_SPACE(sizeof(stateid_t)); 2329 WRITE32(sid->si_generation); 2330 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2331 ADJUST_ARGS(); 2332 } 2333 2334 static __be32 2335 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2336 { 2337 __be32 *p; 2338 2339 if (!nfserr) { 2340 RESERVE_SPACE(8); 2341 WRITE32(access->ac_supported); 2342 WRITE32(access->ac_resp_access); 2343 ADJUST_ARGS(); 2344 } 2345 return nfserr; 2346 } 2347 2348 static __be32 2349 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2350 { 2351 ENCODE_SEQID_OP_HEAD; 2352 2353 if (!nfserr) 2354 nfsd4_encode_stateid(resp, &close->cl_stateid); 2355 2356 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2357 return nfserr; 2358 } 2359 2360 2361 static __be32 2362 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2363 { 2364 __be32 *p; 2365 2366 if (!nfserr) { 2367 RESERVE_SPACE(8); 2368 WRITEMEM(commit->co_verf.data, 8); 2369 ADJUST_ARGS(); 2370 } 2371 return nfserr; 2372 } 2373 2374 static __be32 2375 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2376 { 2377 __be32 *p; 2378 2379 if (!nfserr) { 2380 RESERVE_SPACE(32); 2381 write_cinfo(&p, &create->cr_cinfo); 2382 WRITE32(2); 2383 WRITE32(create->cr_bmval[0]); 2384 WRITE32(create->cr_bmval[1]); 2385 ADJUST_ARGS(); 2386 } 2387 return nfserr; 2388 } 2389 2390 static __be32 2391 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2392 { 2393 struct svc_fh *fhp = getattr->ga_fhp; 2394 int buflen; 2395 2396 if (nfserr) 2397 return nfserr; 2398 2399 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2400 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2401 resp->p, &buflen, getattr->ga_bmval, 2402 resp->rqstp, 0); 2403 if (!nfserr) 2404 resp->p += buflen; 2405 return nfserr; 2406 } 2407 2408 static __be32 2409 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2410 { 2411 struct svc_fh *fhp = *fhpp; 2412 unsigned int len; 2413 __be32 *p; 2414 2415 if (!nfserr) { 2416 len = fhp->fh_handle.fh_size; 2417 RESERVE_SPACE(len + 4); 2418 WRITE32(len); 2419 WRITEMEM(&fhp->fh_handle.fh_base, len); 2420 ADJUST_ARGS(); 2421 } 2422 return nfserr; 2423 } 2424 2425 /* 2426 * Including all fields other than the name, a LOCK4denied structure requires 2427 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2428 */ 2429 static void 2430 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2431 { 2432 __be32 *p; 2433 2434 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2435 WRITE64(ld->ld_start); 2436 WRITE64(ld->ld_length); 2437 WRITE32(ld->ld_type); 2438 if (ld->ld_sop) { 2439 WRITEMEM(&ld->ld_clientid, 8); 2440 WRITE32(ld->ld_sop->so_owner.len); 2441 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2442 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2443 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2444 WRITE64((u64)0); /* clientid */ 2445 WRITE32(0); /* length of owner name */ 2446 } 2447 ADJUST_ARGS(); 2448 } 2449 2450 static __be32 2451 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2452 { 2453 ENCODE_SEQID_OP_HEAD; 2454 2455 if (!nfserr) 2456 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2457 else if (nfserr == nfserr_denied) 2458 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2459 2460 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2461 return nfserr; 2462 } 2463 2464 static __be32 2465 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2466 { 2467 if (nfserr == nfserr_denied) 2468 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2469 return nfserr; 2470 } 2471 2472 static __be32 2473 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2474 { 2475 ENCODE_SEQID_OP_HEAD; 2476 2477 if (!nfserr) 2478 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2479 2480 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2481 return nfserr; 2482 } 2483 2484 2485 static __be32 2486 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2487 { 2488 __be32 *p; 2489 2490 if (!nfserr) { 2491 RESERVE_SPACE(20); 2492 write_cinfo(&p, &link->li_cinfo); 2493 ADJUST_ARGS(); 2494 } 2495 return nfserr; 2496 } 2497 2498 2499 static __be32 2500 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2501 { 2502 __be32 *p; 2503 ENCODE_SEQID_OP_HEAD; 2504 2505 if (nfserr) 2506 goto out; 2507 2508 nfsd4_encode_stateid(resp, &open->op_stateid); 2509 RESERVE_SPACE(40); 2510 write_cinfo(&p, &open->op_cinfo); 2511 WRITE32(open->op_rflags); 2512 WRITE32(2); 2513 WRITE32(open->op_bmval[0]); 2514 WRITE32(open->op_bmval[1]); 2515 WRITE32(open->op_delegate_type); 2516 ADJUST_ARGS(); 2517 2518 switch (open->op_delegate_type) { 2519 case NFS4_OPEN_DELEGATE_NONE: 2520 break; 2521 case NFS4_OPEN_DELEGATE_READ: 2522 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2523 RESERVE_SPACE(20); 2524 WRITE32(open->op_recall); 2525 2526 /* 2527 * TODO: ACE's in delegations 2528 */ 2529 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2530 WRITE32(0); 2531 WRITE32(0); 2532 WRITE32(0); /* XXX: is NULL principal ok? */ 2533 ADJUST_ARGS(); 2534 break; 2535 case NFS4_OPEN_DELEGATE_WRITE: 2536 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2537 RESERVE_SPACE(32); 2538 WRITE32(0); 2539 2540 /* 2541 * TODO: space_limit's in delegations 2542 */ 2543 WRITE32(NFS4_LIMIT_SIZE); 2544 WRITE32(~(u32)0); 2545 WRITE32(~(u32)0); 2546 2547 /* 2548 * TODO: ACE's in delegations 2549 */ 2550 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2551 WRITE32(0); 2552 WRITE32(0); 2553 WRITE32(0); /* XXX: is NULL principal ok? */ 2554 ADJUST_ARGS(); 2555 break; 2556 default: 2557 BUG(); 2558 } 2559 /* XXX save filehandle here */ 2560 out: 2561 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2562 return nfserr; 2563 } 2564 2565 static __be32 2566 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2567 { 2568 ENCODE_SEQID_OP_HEAD; 2569 2570 if (!nfserr) 2571 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2572 2573 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2574 return nfserr; 2575 } 2576 2577 static __be32 2578 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2579 { 2580 ENCODE_SEQID_OP_HEAD; 2581 2582 if (!nfserr) 2583 nfsd4_encode_stateid(resp, &od->od_stateid); 2584 2585 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2586 return nfserr; 2587 } 2588 2589 static __be32 2590 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2591 struct nfsd4_read *read) 2592 { 2593 u32 eof; 2594 int v, pn; 2595 unsigned long maxcount; 2596 long len; 2597 __be32 *p; 2598 2599 if (nfserr) 2600 return nfserr; 2601 if (resp->xbuf->page_len) 2602 return nfserr_resource; 2603 2604 RESERVE_SPACE(8); /* eof flag and byte count */ 2605 2606 maxcount = svc_max_payload(resp->rqstp); 2607 if (maxcount > read->rd_length) 2608 maxcount = read->rd_length; 2609 2610 len = maxcount; 2611 v = 0; 2612 while (len > 0) { 2613 pn = resp->rqstp->rq_resused++; 2614 resp->rqstp->rq_vec[v].iov_base = 2615 page_address(resp->rqstp->rq_respages[pn]); 2616 resp->rqstp->rq_vec[v].iov_len = 2617 len < PAGE_SIZE ? len : PAGE_SIZE; 2618 v++; 2619 len -= PAGE_SIZE; 2620 } 2621 read->rd_vlen = v; 2622 2623 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2624 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2625 &maxcount); 2626 2627 if (nfserr == nfserr_symlink) 2628 nfserr = nfserr_inval; 2629 if (nfserr) 2630 return nfserr; 2631 eof = (read->rd_offset + maxcount >= 2632 read->rd_fhp->fh_dentry->d_inode->i_size); 2633 2634 WRITE32(eof); 2635 WRITE32(maxcount); 2636 ADJUST_ARGS(); 2637 resp->xbuf->head[0].iov_len = (char*)p 2638 - (char*)resp->xbuf->head[0].iov_base; 2639 resp->xbuf->page_len = maxcount; 2640 2641 /* Use rest of head for padding and remaining ops: */ 2642 resp->xbuf->tail[0].iov_base = p; 2643 resp->xbuf->tail[0].iov_len = 0; 2644 if (maxcount&3) { 2645 RESERVE_SPACE(4); 2646 WRITE32(0); 2647 resp->xbuf->tail[0].iov_base += maxcount&3; 2648 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2649 ADJUST_ARGS(); 2650 } 2651 return 0; 2652 } 2653 2654 static __be32 2655 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2656 { 2657 int maxcount; 2658 char *page; 2659 __be32 *p; 2660 2661 if (nfserr) 2662 return nfserr; 2663 if (resp->xbuf->page_len) 2664 return nfserr_resource; 2665 2666 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2667 2668 maxcount = PAGE_SIZE; 2669 RESERVE_SPACE(4); 2670 2671 /* 2672 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2673 * if they would overflow the buffer. Is this kosher in NFSv4? If 2674 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2675 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2676 */ 2677 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2678 if (nfserr == nfserr_isdir) 2679 return nfserr_inval; 2680 if (nfserr) 2681 return nfserr; 2682 2683 WRITE32(maxcount); 2684 ADJUST_ARGS(); 2685 resp->xbuf->head[0].iov_len = (char*)p 2686 - (char*)resp->xbuf->head[0].iov_base; 2687 resp->xbuf->page_len = maxcount; 2688 2689 /* Use rest of head for padding and remaining ops: */ 2690 resp->xbuf->tail[0].iov_base = p; 2691 resp->xbuf->tail[0].iov_len = 0; 2692 if (maxcount&3) { 2693 RESERVE_SPACE(4); 2694 WRITE32(0); 2695 resp->xbuf->tail[0].iov_base += maxcount&3; 2696 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2697 ADJUST_ARGS(); 2698 } 2699 return 0; 2700 } 2701 2702 static __be32 2703 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2704 { 2705 int maxcount; 2706 loff_t offset; 2707 __be32 *page, *savep, *tailbase; 2708 __be32 *p; 2709 2710 if (nfserr) 2711 return nfserr; 2712 if (resp->xbuf->page_len) 2713 return nfserr_resource; 2714 2715 RESERVE_SPACE(8); /* verifier */ 2716 savep = p; 2717 2718 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2719 WRITE32(0); 2720 WRITE32(0); 2721 ADJUST_ARGS(); 2722 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2723 tailbase = p; 2724 2725 maxcount = PAGE_SIZE; 2726 if (maxcount > readdir->rd_maxcount) 2727 maxcount = readdir->rd_maxcount; 2728 2729 /* 2730 * Convert from bytes to words, account for the two words already 2731 * written, make sure to leave two words at the end for the next 2732 * pointer and eof field. 2733 */ 2734 maxcount = (maxcount >> 2) - 4; 2735 if (maxcount < 0) { 2736 nfserr = nfserr_toosmall; 2737 goto err_no_verf; 2738 } 2739 2740 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2741 readdir->common.err = 0; 2742 readdir->buflen = maxcount; 2743 readdir->buffer = page; 2744 readdir->offset = NULL; 2745 2746 offset = readdir->rd_cookie; 2747 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2748 &offset, 2749 &readdir->common, nfsd4_encode_dirent); 2750 if (nfserr == nfs_ok && 2751 readdir->common.err == nfserr_toosmall && 2752 readdir->buffer == page) 2753 nfserr = nfserr_toosmall; 2754 if (nfserr == nfserr_symlink) 2755 nfserr = nfserr_notdir; 2756 if (nfserr) 2757 goto err_no_verf; 2758 2759 if (readdir->offset) 2760 xdr_encode_hyper(readdir->offset, offset); 2761 2762 p = readdir->buffer; 2763 *p++ = 0; /* no more entries */ 2764 *p++ = htonl(readdir->common.err == nfserr_eof); 2765 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2766 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2767 2768 /* Use rest of head for padding and remaining ops: */ 2769 resp->xbuf->tail[0].iov_base = tailbase; 2770 resp->xbuf->tail[0].iov_len = 0; 2771 resp->p = resp->xbuf->tail[0].iov_base; 2772 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2773 2774 return 0; 2775 err_no_verf: 2776 p = savep; 2777 ADJUST_ARGS(); 2778 return nfserr; 2779 } 2780 2781 static __be32 2782 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2783 { 2784 __be32 *p; 2785 2786 if (!nfserr) { 2787 RESERVE_SPACE(20); 2788 write_cinfo(&p, &remove->rm_cinfo); 2789 ADJUST_ARGS(); 2790 } 2791 return nfserr; 2792 } 2793 2794 static __be32 2795 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2796 { 2797 __be32 *p; 2798 2799 if (!nfserr) { 2800 RESERVE_SPACE(40); 2801 write_cinfo(&p, &rename->rn_sinfo); 2802 write_cinfo(&p, &rename->rn_tinfo); 2803 ADJUST_ARGS(); 2804 } 2805 return nfserr; 2806 } 2807 2808 static __be32 2809 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2810 struct nfsd4_secinfo *secinfo) 2811 { 2812 int i = 0; 2813 struct svc_export *exp = secinfo->si_exp; 2814 u32 nflavs; 2815 struct exp_flavor_info *flavs; 2816 struct exp_flavor_info def_flavs[2]; 2817 __be32 *p; 2818 2819 if (nfserr) 2820 goto out; 2821 if (exp->ex_nflavors) { 2822 flavs = exp->ex_flavors; 2823 nflavs = exp->ex_nflavors; 2824 } else { /* Handling of some defaults in absence of real secinfo: */ 2825 flavs = def_flavs; 2826 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2827 nflavs = 2; 2828 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2829 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2830 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2831 nflavs = 1; 2832 flavs[0].pseudoflavor 2833 = svcauth_gss_flavor(exp->ex_client); 2834 } else { 2835 nflavs = 1; 2836 flavs[0].pseudoflavor 2837 = exp->ex_client->flavour->flavour; 2838 } 2839 } 2840 2841 RESERVE_SPACE(4); 2842 WRITE32(nflavs); 2843 ADJUST_ARGS(); 2844 for (i = 0; i < nflavs; i++) { 2845 u32 flav = flavs[i].pseudoflavor; 2846 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2847 2848 if (gm) { 2849 RESERVE_SPACE(4); 2850 WRITE32(RPC_AUTH_GSS); 2851 ADJUST_ARGS(); 2852 RESERVE_SPACE(4 + gm->gm_oid.len); 2853 WRITE32(gm->gm_oid.len); 2854 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2855 ADJUST_ARGS(); 2856 RESERVE_SPACE(4); 2857 WRITE32(0); /* qop */ 2858 ADJUST_ARGS(); 2859 RESERVE_SPACE(4); 2860 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2861 ADJUST_ARGS(); 2862 gss_mech_put(gm); 2863 } else { 2864 RESERVE_SPACE(4); 2865 WRITE32(flav); 2866 ADJUST_ARGS(); 2867 } 2868 } 2869 out: 2870 if (exp) 2871 exp_put(exp); 2872 return nfserr; 2873 } 2874 2875 /* 2876 * The SETATTR encode routine is special -- it always encodes a bitmap, 2877 * regardless of the error status. 2878 */ 2879 static __be32 2880 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2881 { 2882 __be32 *p; 2883 2884 RESERVE_SPACE(12); 2885 if (nfserr) { 2886 WRITE32(2); 2887 WRITE32(0); 2888 WRITE32(0); 2889 } 2890 else { 2891 WRITE32(2); 2892 WRITE32(setattr->sa_bmval[0]); 2893 WRITE32(setattr->sa_bmval[1]); 2894 } 2895 ADJUST_ARGS(); 2896 return nfserr; 2897 } 2898 2899 static __be32 2900 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2901 { 2902 __be32 *p; 2903 2904 if (!nfserr) { 2905 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2906 WRITEMEM(&scd->se_clientid, 8); 2907 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2908 ADJUST_ARGS(); 2909 } 2910 else if (nfserr == nfserr_clid_inuse) { 2911 RESERVE_SPACE(8); 2912 WRITE32(0); 2913 WRITE32(0); 2914 ADJUST_ARGS(); 2915 } 2916 return nfserr; 2917 } 2918 2919 static __be32 2920 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2921 { 2922 __be32 *p; 2923 2924 if (!nfserr) { 2925 RESERVE_SPACE(16); 2926 WRITE32(write->wr_bytes_written); 2927 WRITE32(write->wr_how_written); 2928 WRITEMEM(write->wr_verifier.data, 8); 2929 ADJUST_ARGS(); 2930 } 2931 return nfserr; 2932 } 2933 2934 static __be32 2935 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 2936 struct nfsd4_exchange_id *exid) 2937 { 2938 __be32 *p; 2939 char *major_id; 2940 char *server_scope; 2941 int major_id_sz; 2942 int server_scope_sz; 2943 uint64_t minor_id = 0; 2944 2945 if (nfserr) 2946 return nfserr; 2947 2948 major_id = utsname()->nodename; 2949 major_id_sz = strlen(major_id); 2950 server_scope = utsname()->nodename; 2951 server_scope_sz = strlen(server_scope); 2952 2953 RESERVE_SPACE( 2954 8 /* eir_clientid */ + 2955 4 /* eir_sequenceid */ + 2956 4 /* eir_flags */ + 2957 4 /* spr_how (SP4_NONE) */ + 2958 8 /* so_minor_id */ + 2959 4 /* so_major_id.len */ + 2960 (XDR_QUADLEN(major_id_sz) * 4) + 2961 4 /* eir_server_scope.len */ + 2962 (XDR_QUADLEN(server_scope_sz) * 4) + 2963 4 /* eir_server_impl_id.count (0) */); 2964 2965 WRITEMEM(&exid->clientid, 8); 2966 WRITE32(exid->seqid); 2967 WRITE32(exid->flags); 2968 2969 /* state_protect4_r. Currently only support SP4_NONE */ 2970 BUG_ON(exid->spa_how != SP4_NONE); 2971 WRITE32(exid->spa_how); 2972 2973 /* The server_owner struct */ 2974 WRITE64(minor_id); /* Minor id */ 2975 /* major id */ 2976 WRITE32(major_id_sz); 2977 WRITEMEM(major_id, major_id_sz); 2978 2979 /* Server scope */ 2980 WRITE32(server_scope_sz); 2981 WRITEMEM(server_scope, server_scope_sz); 2982 2983 /* Implementation id */ 2984 WRITE32(0); /* zero length nfs_impl_id4 array */ 2985 ADJUST_ARGS(); 2986 return 0; 2987 } 2988 2989 static __be32 2990 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 2991 struct nfsd4_create_session *sess) 2992 { 2993 __be32 *p; 2994 2995 if (nfserr) 2996 return nfserr; 2997 2998 RESERVE_SPACE(24); 2999 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3000 WRITE32(sess->seqid); 3001 WRITE32(sess->flags); 3002 ADJUST_ARGS(); 3003 3004 RESERVE_SPACE(28); 3005 WRITE32(0); /* headerpadsz */ 3006 WRITE32(sess->fore_channel.maxreq_sz); 3007 WRITE32(sess->fore_channel.maxresp_sz); 3008 WRITE32(sess->fore_channel.maxresp_cached); 3009 WRITE32(sess->fore_channel.maxops); 3010 WRITE32(sess->fore_channel.maxreqs); 3011 WRITE32(sess->fore_channel.nr_rdma_attrs); 3012 ADJUST_ARGS(); 3013 3014 if (sess->fore_channel.nr_rdma_attrs) { 3015 RESERVE_SPACE(4); 3016 WRITE32(sess->fore_channel.rdma_attrs); 3017 ADJUST_ARGS(); 3018 } 3019 3020 RESERVE_SPACE(28); 3021 WRITE32(0); /* headerpadsz */ 3022 WRITE32(sess->back_channel.maxreq_sz); 3023 WRITE32(sess->back_channel.maxresp_sz); 3024 WRITE32(sess->back_channel.maxresp_cached); 3025 WRITE32(sess->back_channel.maxops); 3026 WRITE32(sess->back_channel.maxreqs); 3027 WRITE32(sess->back_channel.nr_rdma_attrs); 3028 ADJUST_ARGS(); 3029 3030 if (sess->back_channel.nr_rdma_attrs) { 3031 RESERVE_SPACE(4); 3032 WRITE32(sess->back_channel.rdma_attrs); 3033 ADJUST_ARGS(); 3034 } 3035 return 0; 3036 } 3037 3038 static __be32 3039 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3040 struct nfsd4_destroy_session *destroy_session) 3041 { 3042 return nfserr; 3043 } 3044 3045 __be32 3046 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3047 struct nfsd4_sequence *seq) 3048 { 3049 __be32 *p; 3050 3051 if (nfserr) 3052 return nfserr; 3053 3054 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3055 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3056 WRITE32(seq->seqid); 3057 WRITE32(seq->slotid); 3058 WRITE32(seq->maxslots); 3059 /* 3060 * FIXME: for now: 3061 * target_maxslots = maxslots 3062 * status_flags = 0 3063 */ 3064 WRITE32(seq->maxslots); 3065 WRITE32(0); 3066 3067 ADJUST_ARGS(); 3068 resp->cstate.datap = p; /* DRC cache data pointer */ 3069 return 0; 3070 } 3071 3072 static __be32 3073 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3074 { 3075 return nfserr; 3076 } 3077 3078 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3079 3080 /* 3081 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3082 * since we don't need to filter out obsolete ops as this is 3083 * done in the decoding phase. 3084 */ 3085 static nfsd4_enc nfsd4_enc_ops[] = { 3086 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3087 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3088 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3089 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3090 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3091 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3092 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3093 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3094 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3095 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3096 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3097 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3098 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3099 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3100 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3101 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3102 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3103 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3104 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3105 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3106 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3107 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3108 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3109 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3110 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3111 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3112 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3113 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3114 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3115 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3116 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3117 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3118 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3119 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3120 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3121 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3122 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3123 3124 /* NFSv4.1 operations */ 3125 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3126 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 3127 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3128 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3129 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3130 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3131 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3132 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3133 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3134 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3135 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3136 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3137 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop, 3138 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3139 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3140 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3141 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3142 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3143 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3144 }; 3145 3146 /* 3147 * Calculate the total amount of memory that the compound response has taken 3148 * after encoding the current operation. 3149 * 3150 * pad: add on 8 bytes for the next operation's op_code and status so that 3151 * there is room to cache a failure on the next operation. 3152 * 3153 * Compare this length to the session se_fmaxresp_cached. 3154 * 3155 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3156 * will be at least a page and will therefore hold the xdr_buf head. 3157 */ 3158 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) 3159 { 3160 int status = 0; 3161 struct xdr_buf *xb = &resp->rqstp->rq_res; 3162 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; 3163 struct nfsd4_session *session = NULL; 3164 struct nfsd4_slot *slot = resp->cstate.slot; 3165 u32 length, tlen = 0, pad = 8; 3166 3167 if (!nfsd4_has_session(&resp->cstate)) 3168 return status; 3169 3170 session = resp->cstate.session; 3171 if (session == NULL || slot->sl_cachethis == 0) 3172 return status; 3173 3174 if (resp->opcnt >= args->opcnt) 3175 pad = 0; /* this is the last operation */ 3176 3177 if (xb->page_len == 0) { 3178 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3179 } else { 3180 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3181 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3182 3183 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3184 } 3185 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3186 length, xb->page_len, tlen, pad); 3187 3188 if (length <= session->se_fchannel.maxresp_cached) 3189 return status; 3190 else 3191 return nfserr_rep_too_big_to_cache; 3192 } 3193 3194 void 3195 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3196 { 3197 __be32 *statp; 3198 __be32 *p; 3199 3200 RESERVE_SPACE(8); 3201 WRITE32(op->opnum); 3202 statp = p++; /* to be backfilled at the end */ 3203 ADJUST_ARGS(); 3204 3205 if (op->opnum == OP_ILLEGAL) 3206 goto status; 3207 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3208 !nfsd4_enc_ops[op->opnum]); 3209 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3210 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3211 if (!op->status && nfsd4_check_drc_limit(resp)) 3212 op->status = nfserr_rep_too_big_to_cache; 3213 status: 3214 /* 3215 * Note: We write the status directly, instead of using WRITE32(), 3216 * since it is already in network byte order. 3217 */ 3218 *statp = op->status; 3219 } 3220 3221 /* 3222 * Encode the reply stored in the stateowner reply cache 3223 * 3224 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3225 * previously sent already encoded operation. 3226 * 3227 * called with nfs4_lock_state() held 3228 */ 3229 void 3230 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3231 { 3232 __be32 *p; 3233 struct nfs4_replay *rp = op->replay; 3234 3235 BUG_ON(!rp); 3236 3237 RESERVE_SPACE(8); 3238 WRITE32(op->opnum); 3239 *p++ = rp->rp_status; /* already xdr'ed */ 3240 ADJUST_ARGS(); 3241 3242 RESERVE_SPACE(rp->rp_buflen); 3243 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3244 ADJUST_ARGS(); 3245 } 3246 3247 int 3248 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3249 { 3250 return xdr_ressize_check(rqstp, p); 3251 } 3252 3253 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 3254 { 3255 if (args->ops != args->iops) { 3256 kfree(args->ops); 3257 args->ops = args->iops; 3258 } 3259 kfree(args->tmpp); 3260 args->tmpp = NULL; 3261 while (args->to_free) { 3262 struct tmpbuf *tb = args->to_free; 3263 args->to_free = tb->next; 3264 tb->release(tb->buf); 3265 kfree(tb); 3266 } 3267 } 3268 3269 int 3270 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3271 { 3272 __be32 status; 3273 3274 args->p = p; 3275 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3276 args->pagelist = rqstp->rq_arg.pages; 3277 args->pagelen = rqstp->rq_arg.page_len; 3278 args->tmpp = NULL; 3279 args->to_free = NULL; 3280 args->ops = args->iops; 3281 args->rqstp = rqstp; 3282 3283 status = nfsd4_decode_compound(args); 3284 if (status) { 3285 nfsd4_release_compoundargs(args); 3286 } 3287 return !status; 3288 } 3289 3290 int 3291 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3292 { 3293 /* 3294 * All that remains is to write the tag and operation count... 3295 */ 3296 struct nfsd4_compound_state *cs = &resp->cstate; 3297 struct kvec *iov; 3298 p = resp->tagp; 3299 *p++ = htonl(resp->taglen); 3300 memcpy(p, resp->tag, resp->taglen); 3301 p += XDR_QUADLEN(resp->taglen); 3302 *p++ = htonl(resp->opcnt); 3303 3304 if (rqstp->rq_res.page_len) 3305 iov = &rqstp->rq_res.tail[0]; 3306 else 3307 iov = &rqstp->rq_res.head[0]; 3308 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3309 BUG_ON(iov->iov_len > PAGE_SIZE); 3310 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) { 3311 nfsd4_store_cache_entry(resp); 3312 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3313 resp->cstate.slot->sl_inuse = false; 3314 nfsd4_put_session(resp->cstate.session); 3315 } 3316 return 1; 3317 } 3318 3319 /* 3320 * Local variables: 3321 * c-basic-offset: 8 3322 * End: 3323 */ 3324