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/pagemap.h> 48 #include <linux/sunrpc/svcauth_gss.h> 49 50 #include "idmap.h" 51 #include "acl.h" 52 #include "xdr4.h" 53 #include "vfs.h" 54 #include "state.h" 55 #include "cache.h" 56 57 #define NFSDDBG_FACILITY NFSDDBG_XDR 58 59 /* 60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 61 * directory in order to indicate to the client that a filesystem boundary is present 62 * We use a fixed fsid for a referral 63 */ 64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 66 67 static __be32 68 check_filename(char *str, int len, __be32 err) 69 { 70 int i; 71 72 if (len == 0) 73 return nfserr_inval; 74 if (isdotent(str, len)) 75 return err; 76 for (i = 0; i < len; i++) 77 if (str[i] == '/') 78 return err; 79 return 0; 80 } 81 82 #define DECODE_HEAD \ 83 __be32 *p; \ 84 __be32 status 85 #define DECODE_TAIL \ 86 status = 0; \ 87 out: \ 88 return status; \ 89 xdr_error: \ 90 dprintk("NFSD: xdr error (%s:%d)\n", \ 91 __FILE__, __LINE__); \ 92 status = nfserr_bad_xdr; \ 93 goto out 94 95 #define READ32(x) (x) = ntohl(*p++) 96 #define READ64(x) do { \ 97 (x) = (u64)ntohl(*p++) << 32; \ 98 (x) |= ntohl(*p++); \ 99 } while (0) 100 #define READTIME(x) do { \ 101 p++; \ 102 (x) = ntohl(*p++); \ 103 p++; \ 104 } while (0) 105 #define READMEM(x,nbytes) do { \ 106 x = (char *)p; \ 107 p += XDR_QUADLEN(nbytes); \ 108 } while (0) 109 #define SAVEMEM(x,nbytes) do { \ 110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 111 savemem(argp, p, nbytes) : \ 112 (char *)p)) { \ 113 dprintk("NFSD: xdr error (%s:%d)\n", \ 114 __FILE__, __LINE__); \ 115 goto xdr_error; \ 116 } \ 117 p += XDR_QUADLEN(nbytes); \ 118 } while (0) 119 #define COPYMEM(x,nbytes) do { \ 120 memcpy((x), p, nbytes); \ 121 p += XDR_QUADLEN(nbytes); \ 122 } while (0) 123 124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 125 #define READ_BUF(nbytes) do { \ 126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 127 p = argp->p; \ 128 argp->p += XDR_QUADLEN(nbytes); \ 129 } else if (!(p = read_buf(argp, nbytes))) { \ 130 dprintk("NFSD: xdr error (%s:%d)\n", \ 131 __FILE__, __LINE__); \ 132 goto xdr_error; \ 133 } \ 134 } while (0) 135 136 static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep) 137 { 138 savep->p = argp->p; 139 savep->end = argp->end; 140 savep->pagelen = argp->pagelen; 141 savep->pagelist = argp->pagelist; 142 } 143 144 static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep) 145 { 146 argp->p = savep->p; 147 argp->end = savep->end; 148 argp->pagelen = savep->pagelen; 149 argp->pagelist = savep->pagelist; 150 } 151 152 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 153 { 154 /* We want more bytes than seem to be available. 155 * Maybe we need a new page, maybe we have just run out 156 */ 157 unsigned int avail = (char *)argp->end - (char *)argp->p; 158 __be32 *p; 159 if (avail + argp->pagelen < nbytes) 160 return NULL; 161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 162 return NULL; 163 /* ok, we can do it with the current plus the next page */ 164 if (nbytes <= sizeof(argp->tmp)) 165 p = argp->tmp; 166 else { 167 kfree(argp->tmpp); 168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 169 if (!p) 170 return NULL; 171 172 } 173 /* 174 * The following memcpy is safe because read_buf is always 175 * called with nbytes > avail, and the two cases above both 176 * guarantee p points to at least nbytes bytes. 177 */ 178 memcpy(p, argp->p, avail); 179 /* step to next page */ 180 argp->p = page_address(argp->pagelist[0]); 181 argp->pagelist++; 182 if (argp->pagelen < PAGE_SIZE) { 183 argp->end = argp->p + (argp->pagelen>>2); 184 argp->pagelen = 0; 185 } else { 186 argp->end = argp->p + (PAGE_SIZE>>2); 187 argp->pagelen -= PAGE_SIZE; 188 } 189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 190 argp->p += XDR_QUADLEN(nbytes - avail); 191 return p; 192 } 193 194 static int zero_clientid(clientid_t *clid) 195 { 196 return (clid->cl_boot == 0) && (clid->cl_id == 0); 197 } 198 199 static int 200 defer_free(struct nfsd4_compoundargs *argp, 201 void (*release)(const void *), void *p) 202 { 203 struct tmpbuf *tb; 204 205 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 206 if (!tb) 207 return -ENOMEM; 208 tb->buf = p; 209 tb->release = release; 210 tb->next = argp->to_free; 211 argp->to_free = tb; 212 return 0; 213 } 214 215 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 216 { 217 if (p == argp->tmp) { 218 p = kmalloc(nbytes, GFP_KERNEL); 219 if (!p) 220 return NULL; 221 memcpy(p, argp->tmp, nbytes); 222 } else { 223 BUG_ON(p != argp->tmpp); 224 argp->tmpp = NULL; 225 } 226 if (defer_free(argp, kfree, p)) { 227 kfree(p); 228 return NULL; 229 } else 230 return (char *)p; 231 } 232 233 static __be32 234 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 235 { 236 u32 bmlen; 237 DECODE_HEAD; 238 239 bmval[0] = 0; 240 bmval[1] = 0; 241 bmval[2] = 0; 242 243 READ_BUF(4); 244 READ32(bmlen); 245 if (bmlen > 1000) 246 goto xdr_error; 247 248 READ_BUF(bmlen << 2); 249 if (bmlen > 0) 250 READ32(bmval[0]); 251 if (bmlen > 1) 252 READ32(bmval[1]); 253 if (bmlen > 2) 254 READ32(bmval[2]); 255 256 DECODE_TAIL; 257 } 258 259 static __be32 260 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 261 struct iattr *iattr, struct nfs4_acl **acl) 262 { 263 int expected_len, len = 0; 264 u32 dummy32; 265 char *buf; 266 int host_err; 267 268 DECODE_HEAD; 269 iattr->ia_valid = 0; 270 if ((status = nfsd4_decode_bitmap(argp, bmval))) 271 return status; 272 273 READ_BUF(4); 274 READ32(expected_len); 275 276 if (bmval[0] & FATTR4_WORD0_SIZE) { 277 READ_BUF(8); 278 len += 8; 279 READ64(iattr->ia_size); 280 iattr->ia_valid |= ATTR_SIZE; 281 } 282 if (bmval[0] & FATTR4_WORD0_ACL) { 283 int nace; 284 struct nfs4_ace *ace; 285 286 READ_BUF(4); len += 4; 287 READ32(nace); 288 289 if (nace > NFS4_ACL_MAX) 290 return nfserr_resource; 291 292 *acl = nfs4_acl_new(nace); 293 if (*acl == NULL) { 294 host_err = -ENOMEM; 295 goto out_nfserr; 296 } 297 defer_free(argp, kfree, *acl); 298 299 (*acl)->naces = nace; 300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 301 READ_BUF(16); len += 16; 302 READ32(ace->type); 303 READ32(ace->flag); 304 READ32(ace->access_mask); 305 READ32(dummy32); 306 READ_BUF(dummy32); 307 len += XDR_QUADLEN(dummy32) << 2; 308 READMEM(buf, dummy32); 309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 310 status = nfs_ok; 311 if (ace->whotype != NFS4_ACL_WHO_NAMED) 312 ace->who = 0; 313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 314 status = nfsd_map_name_to_gid(argp->rqstp, 315 buf, dummy32, &ace->who); 316 else 317 status = nfsd_map_name_to_uid(argp->rqstp, 318 buf, dummy32, &ace->who); 319 if (status) 320 return status; 321 } 322 } else 323 *acl = NULL; 324 if (bmval[1] & FATTR4_WORD1_MODE) { 325 READ_BUF(4); 326 len += 4; 327 READ32(iattr->ia_mode); 328 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 329 iattr->ia_valid |= ATTR_MODE; 330 } 331 if (bmval[1] & FATTR4_WORD1_OWNER) { 332 READ_BUF(4); 333 len += 4; 334 READ32(dummy32); 335 READ_BUF(dummy32); 336 len += (XDR_QUADLEN(dummy32) << 2); 337 READMEM(buf, dummy32); 338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 339 return status; 340 iattr->ia_valid |= ATTR_UID; 341 } 342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 343 READ_BUF(4); 344 len += 4; 345 READ32(dummy32); 346 READ_BUF(dummy32); 347 len += (XDR_QUADLEN(dummy32) << 2); 348 READMEM(buf, dummy32); 349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 350 return status; 351 iattr->ia_valid |= ATTR_GID; 352 } 353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 354 READ_BUF(4); 355 len += 4; 356 READ32(dummy32); 357 switch (dummy32) { 358 case NFS4_SET_TO_CLIENT_TIME: 359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 360 all 32 bits of 'nseconds'. */ 361 READ_BUF(12); 362 len += 12; 363 READ32(dummy32); 364 if (dummy32) 365 return nfserr_inval; 366 READ32(iattr->ia_atime.tv_sec); 367 READ32(iattr->ia_atime.tv_nsec); 368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 369 return nfserr_inval; 370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 371 break; 372 case NFS4_SET_TO_SERVER_TIME: 373 iattr->ia_valid |= ATTR_ATIME; 374 break; 375 default: 376 goto xdr_error; 377 } 378 } 379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 380 READ_BUF(4); 381 len += 4; 382 READ32(dummy32); 383 switch (dummy32) { 384 case NFS4_SET_TO_CLIENT_TIME: 385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 386 all 32 bits of 'nseconds'. */ 387 READ_BUF(12); 388 len += 12; 389 READ32(dummy32); 390 if (dummy32) 391 return nfserr_inval; 392 READ32(iattr->ia_mtime.tv_sec); 393 READ32(iattr->ia_mtime.tv_nsec); 394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 395 return nfserr_inval; 396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 397 break; 398 case NFS4_SET_TO_SERVER_TIME: 399 iattr->ia_valid |= ATTR_MTIME; 400 break; 401 default: 402 goto xdr_error; 403 } 404 } 405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 408 READ_BUF(expected_len - len); 409 else if (len != expected_len) 410 goto xdr_error; 411 412 DECODE_TAIL; 413 414 out_nfserr: 415 status = nfserrno(host_err); 416 goto out; 417 } 418 419 static __be32 420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 421 { 422 DECODE_HEAD; 423 424 READ_BUF(sizeof(stateid_t)); 425 READ32(sid->si_generation); 426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 427 428 DECODE_TAIL; 429 } 430 431 static __be32 432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 433 { 434 DECODE_HEAD; 435 436 READ_BUF(4); 437 READ32(access->ac_req_access); 438 439 DECODE_TAIL; 440 } 441 442 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 443 { 444 DECODE_HEAD; 445 446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 448 READ32(bcts->dir); 449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 450 * could help us figure out we should be using it. */ 451 DECODE_TAIL; 452 } 453 454 static __be32 455 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 456 { 457 DECODE_HEAD; 458 459 READ_BUF(4); 460 READ32(close->cl_seqid); 461 return nfsd4_decode_stateid(argp, &close->cl_stateid); 462 463 DECODE_TAIL; 464 } 465 466 467 static __be32 468 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 469 { 470 DECODE_HEAD; 471 472 READ_BUF(12); 473 READ64(commit->co_offset); 474 READ32(commit->co_count); 475 476 DECODE_TAIL; 477 } 478 479 static __be32 480 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 481 { 482 DECODE_HEAD; 483 484 READ_BUF(4); 485 READ32(create->cr_type); 486 switch (create->cr_type) { 487 case NF4LNK: 488 READ_BUF(4); 489 READ32(create->cr_linklen); 490 READ_BUF(create->cr_linklen); 491 SAVEMEM(create->cr_linkname, create->cr_linklen); 492 break; 493 case NF4BLK: 494 case NF4CHR: 495 READ_BUF(8); 496 READ32(create->cr_specdata1); 497 READ32(create->cr_specdata2); 498 break; 499 case NF4SOCK: 500 case NF4FIFO: 501 case NF4DIR: 502 default: 503 break; 504 } 505 506 READ_BUF(4); 507 READ32(create->cr_namelen); 508 READ_BUF(create->cr_namelen); 509 SAVEMEM(create->cr_name, create->cr_namelen); 510 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 511 return status; 512 513 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 514 &create->cr_acl); 515 if (status) 516 goto out; 517 518 DECODE_TAIL; 519 } 520 521 static inline __be32 522 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 523 { 524 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 525 } 526 527 static inline __be32 528 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 529 { 530 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 531 } 532 533 static __be32 534 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 535 { 536 DECODE_HEAD; 537 538 READ_BUF(4); 539 READ32(link->li_namelen); 540 READ_BUF(link->li_namelen); 541 SAVEMEM(link->li_name, link->li_namelen); 542 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 543 return status; 544 545 DECODE_TAIL; 546 } 547 548 static __be32 549 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 550 { 551 DECODE_HEAD; 552 553 /* 554 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 555 */ 556 READ_BUF(28); 557 READ32(lock->lk_type); 558 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 559 goto xdr_error; 560 READ32(lock->lk_reclaim); 561 READ64(lock->lk_offset); 562 READ64(lock->lk_length); 563 READ32(lock->lk_is_new); 564 565 if (lock->lk_is_new) { 566 READ_BUF(4); 567 READ32(lock->lk_new_open_seqid); 568 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 569 if (status) 570 return status; 571 READ_BUF(8 + sizeof(clientid_t)); 572 READ32(lock->lk_new_lock_seqid); 573 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 574 READ32(lock->lk_new_owner.len); 575 READ_BUF(lock->lk_new_owner.len); 576 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 577 } else { 578 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 579 if (status) 580 return status; 581 READ_BUF(4); 582 READ32(lock->lk_old_lock_seqid); 583 } 584 585 DECODE_TAIL; 586 } 587 588 static __be32 589 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 590 { 591 DECODE_HEAD; 592 593 READ_BUF(32); 594 READ32(lockt->lt_type); 595 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 596 goto xdr_error; 597 READ64(lockt->lt_offset); 598 READ64(lockt->lt_length); 599 COPYMEM(&lockt->lt_clientid, 8); 600 READ32(lockt->lt_owner.len); 601 READ_BUF(lockt->lt_owner.len); 602 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 603 604 DECODE_TAIL; 605 } 606 607 static __be32 608 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 609 { 610 DECODE_HEAD; 611 612 READ_BUF(8); 613 READ32(locku->lu_type); 614 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 615 goto xdr_error; 616 READ32(locku->lu_seqid); 617 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 618 if (status) 619 return status; 620 READ_BUF(16); 621 READ64(locku->lu_offset); 622 READ64(locku->lu_length); 623 624 DECODE_TAIL; 625 } 626 627 static __be32 628 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 629 { 630 DECODE_HEAD; 631 632 READ_BUF(4); 633 READ32(lookup->lo_len); 634 READ_BUF(lookup->lo_len); 635 SAVEMEM(lookup->lo_name, lookup->lo_len); 636 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 637 return status; 638 639 DECODE_TAIL; 640 } 641 642 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *x) 643 { 644 __be32 *p; 645 u32 w; 646 647 READ_BUF(4); 648 READ32(w); 649 *x = w; 650 switch (w & NFS4_SHARE_ACCESS_MASK) { 651 case NFS4_SHARE_ACCESS_READ: 652 case NFS4_SHARE_ACCESS_WRITE: 653 case NFS4_SHARE_ACCESS_BOTH: 654 break; 655 default: 656 return nfserr_bad_xdr; 657 } 658 w &= ~NFS4_SHARE_ACCESS_MASK; 659 if (!w) 660 return nfs_ok; 661 if (!argp->minorversion) 662 return nfserr_bad_xdr; 663 switch (w & NFS4_SHARE_WANT_MASK) { 664 case NFS4_SHARE_WANT_NO_PREFERENCE: 665 case NFS4_SHARE_WANT_READ_DELEG: 666 case NFS4_SHARE_WANT_WRITE_DELEG: 667 case NFS4_SHARE_WANT_ANY_DELEG: 668 case NFS4_SHARE_WANT_NO_DELEG: 669 case NFS4_SHARE_WANT_CANCEL: 670 break; 671 default: 672 return nfserr_bad_xdr; 673 } 674 w &= ~NFS4_SHARE_WANT_MASK; 675 if (!w) 676 return nfs_ok; 677 switch (w) { 678 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 679 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 680 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 681 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 682 return nfs_ok; 683 } 684 xdr_error: 685 return nfserr_bad_xdr; 686 } 687 688 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 689 { 690 __be32 *p; 691 692 READ_BUF(4); 693 READ32(*x); 694 /* Note: unlinke access bits, deny bits may be zero. */ 695 if (*x & ~NFS4_SHARE_DENY_BOTH) 696 return nfserr_bad_xdr; 697 return nfs_ok; 698 xdr_error: 699 return nfserr_bad_xdr; 700 } 701 702 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 703 { 704 __be32 *p; 705 706 READ_BUF(4); 707 READ32(o->len); 708 709 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 710 return nfserr_bad_xdr; 711 712 READ_BUF(o->len); 713 SAVEMEM(o->data, o->len); 714 return nfs_ok; 715 xdr_error: 716 return nfserr_bad_xdr; 717 } 718 719 static __be32 720 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 721 { 722 DECODE_HEAD; 723 724 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 725 open->op_iattr.ia_valid = 0; 726 open->op_openowner = NULL; 727 728 /* seqid, share_access, share_deny, clientid, ownerlen */ 729 READ_BUF(4); 730 READ32(open->op_seqid); 731 status = nfsd4_decode_share_access(argp, &open->op_share_access); 732 if (status) 733 goto xdr_error; 734 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 735 if (status) 736 goto xdr_error; 737 READ_BUF(sizeof(clientid_t)); 738 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 739 status = nfsd4_decode_opaque(argp, &open->op_owner); 740 if (status) 741 goto xdr_error; 742 READ_BUF(4); 743 READ32(open->op_create); 744 switch (open->op_create) { 745 case NFS4_OPEN_NOCREATE: 746 break; 747 case NFS4_OPEN_CREATE: 748 READ_BUF(4); 749 READ32(open->op_createmode); 750 switch (open->op_createmode) { 751 case NFS4_CREATE_UNCHECKED: 752 case NFS4_CREATE_GUARDED: 753 status = nfsd4_decode_fattr(argp, open->op_bmval, 754 &open->op_iattr, &open->op_acl); 755 if (status) 756 goto out; 757 break; 758 case NFS4_CREATE_EXCLUSIVE: 759 READ_BUF(8); 760 COPYMEM(open->op_verf.data, 8); 761 break; 762 case NFS4_CREATE_EXCLUSIVE4_1: 763 if (argp->minorversion < 1) 764 goto xdr_error; 765 READ_BUF(8); 766 COPYMEM(open->op_verf.data, 8); 767 status = nfsd4_decode_fattr(argp, open->op_bmval, 768 &open->op_iattr, &open->op_acl); 769 if (status) 770 goto out; 771 break; 772 default: 773 goto xdr_error; 774 } 775 break; 776 default: 777 goto xdr_error; 778 } 779 780 /* open_claim */ 781 READ_BUF(4); 782 READ32(open->op_claim_type); 783 switch (open->op_claim_type) { 784 case NFS4_OPEN_CLAIM_NULL: 785 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 786 READ_BUF(4); 787 READ32(open->op_fname.len); 788 READ_BUF(open->op_fname.len); 789 SAVEMEM(open->op_fname.data, open->op_fname.len); 790 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 791 return status; 792 break; 793 case NFS4_OPEN_CLAIM_PREVIOUS: 794 READ_BUF(4); 795 READ32(open->op_delegate_type); 796 break; 797 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 798 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 799 if (status) 800 return status; 801 READ_BUF(4); 802 READ32(open->op_fname.len); 803 READ_BUF(open->op_fname.len); 804 SAVEMEM(open->op_fname.data, open->op_fname.len); 805 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 806 return status; 807 break; 808 case NFS4_OPEN_CLAIM_FH: 809 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 810 if (argp->minorversion < 1) 811 goto xdr_error; 812 /* void */ 813 break; 814 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 815 if (argp->minorversion < 1) 816 goto xdr_error; 817 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 818 if (status) 819 return status; 820 break; 821 default: 822 goto xdr_error; 823 } 824 825 DECODE_TAIL; 826 } 827 828 static __be32 829 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 830 { 831 DECODE_HEAD; 832 833 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 834 if (status) 835 return status; 836 READ_BUF(4); 837 READ32(open_conf->oc_seqid); 838 839 DECODE_TAIL; 840 } 841 842 static __be32 843 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 844 { 845 DECODE_HEAD; 846 847 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 848 if (status) 849 return status; 850 READ_BUF(4); 851 READ32(open_down->od_seqid); 852 status = nfsd4_decode_share_access(argp, &open_down->od_share_access); 853 if (status) 854 return status; 855 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 856 if (status) 857 return status; 858 DECODE_TAIL; 859 } 860 861 static __be32 862 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 863 { 864 DECODE_HEAD; 865 866 READ_BUF(4); 867 READ32(putfh->pf_fhlen); 868 if (putfh->pf_fhlen > NFS4_FHSIZE) 869 goto xdr_error; 870 READ_BUF(putfh->pf_fhlen); 871 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 872 873 DECODE_TAIL; 874 } 875 876 static __be32 877 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 878 { 879 DECODE_HEAD; 880 881 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 882 if (status) 883 return status; 884 READ_BUF(12); 885 READ64(read->rd_offset); 886 READ32(read->rd_length); 887 888 DECODE_TAIL; 889 } 890 891 static __be32 892 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 893 { 894 DECODE_HEAD; 895 896 READ_BUF(24); 897 READ64(readdir->rd_cookie); 898 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 899 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 900 READ32(readdir->rd_maxcount); 901 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 902 goto out; 903 904 DECODE_TAIL; 905 } 906 907 static __be32 908 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 909 { 910 DECODE_HEAD; 911 912 READ_BUF(4); 913 READ32(remove->rm_namelen); 914 READ_BUF(remove->rm_namelen); 915 SAVEMEM(remove->rm_name, remove->rm_namelen); 916 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 917 return status; 918 919 DECODE_TAIL; 920 } 921 922 static __be32 923 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 924 { 925 DECODE_HEAD; 926 927 READ_BUF(4); 928 READ32(rename->rn_snamelen); 929 READ_BUF(rename->rn_snamelen + 4); 930 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 931 READ32(rename->rn_tnamelen); 932 READ_BUF(rename->rn_tnamelen); 933 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 934 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 935 return status; 936 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 937 return status; 938 939 DECODE_TAIL; 940 } 941 942 static __be32 943 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 944 { 945 DECODE_HEAD; 946 947 READ_BUF(sizeof(clientid_t)); 948 COPYMEM(clientid, sizeof(clientid_t)); 949 950 DECODE_TAIL; 951 } 952 953 static __be32 954 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 955 struct nfsd4_secinfo *secinfo) 956 { 957 DECODE_HEAD; 958 959 READ_BUF(4); 960 READ32(secinfo->si_namelen); 961 READ_BUF(secinfo->si_namelen); 962 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 963 status = check_filename(secinfo->si_name, secinfo->si_namelen, 964 nfserr_noent); 965 if (status) 966 return status; 967 DECODE_TAIL; 968 } 969 970 static __be32 971 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 972 struct nfsd4_secinfo_no_name *sin) 973 { 974 DECODE_HEAD; 975 976 READ_BUF(4); 977 READ32(sin->sin_style); 978 DECODE_TAIL; 979 } 980 981 static __be32 982 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 983 { 984 __be32 status; 985 986 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 987 if (status) 988 return status; 989 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 990 &setattr->sa_acl); 991 } 992 993 static __be32 994 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 995 { 996 DECODE_HEAD; 997 998 READ_BUF(8); 999 COPYMEM(setclientid->se_verf.data, 8); 1000 1001 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1002 if (status) 1003 return nfserr_bad_xdr; 1004 READ_BUF(8); 1005 READ32(setclientid->se_callback_prog); 1006 READ32(setclientid->se_callback_netid_len); 1007 1008 READ_BUF(setclientid->se_callback_netid_len + 4); 1009 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1010 READ32(setclientid->se_callback_addr_len); 1011 1012 READ_BUF(setclientid->se_callback_addr_len + 4); 1013 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1014 READ32(setclientid->se_callback_ident); 1015 1016 DECODE_TAIL; 1017 } 1018 1019 static __be32 1020 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1021 { 1022 DECODE_HEAD; 1023 1024 READ_BUF(8 + sizeof(nfs4_verifier)); 1025 COPYMEM(&scd_c->sc_clientid, 8); 1026 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 1027 1028 DECODE_TAIL; 1029 } 1030 1031 /* Also used for NVERIFY */ 1032 static __be32 1033 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1034 { 1035 #if 0 1036 struct nfsd4_compoundargs save = { 1037 .p = argp->p, 1038 .end = argp->end, 1039 .rqstp = argp->rqstp, 1040 }; 1041 u32 ve_bmval[2]; 1042 struct iattr ve_iattr; /* request */ 1043 struct nfs4_acl *ve_acl; /* request */ 1044 #endif 1045 DECODE_HEAD; 1046 1047 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1048 goto out; 1049 1050 /* For convenience's sake, we compare raw xdr'd attributes in 1051 * nfsd4_proc_verify; however we still decode here just to return 1052 * correct error in case of bad xdr. */ 1053 #if 0 1054 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 1055 if (status == nfserr_inval) { 1056 status = nfserrno(status); 1057 goto out; 1058 } 1059 #endif 1060 READ_BUF(4); 1061 READ32(verify->ve_attrlen); 1062 READ_BUF(verify->ve_attrlen); 1063 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1064 1065 DECODE_TAIL; 1066 } 1067 1068 static __be32 1069 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1070 { 1071 int avail; 1072 int v; 1073 int len; 1074 DECODE_HEAD; 1075 1076 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1077 if (status) 1078 return status; 1079 READ_BUF(16); 1080 READ64(write->wr_offset); 1081 READ32(write->wr_stable_how); 1082 if (write->wr_stable_how > 2) 1083 goto xdr_error; 1084 READ32(write->wr_buflen); 1085 1086 /* Sorry .. no magic macros for this.. * 1087 * READ_BUF(write->wr_buflen); 1088 * SAVEMEM(write->wr_buf, write->wr_buflen); 1089 */ 1090 avail = (char*)argp->end - (char*)argp->p; 1091 if (avail + argp->pagelen < write->wr_buflen) { 1092 dprintk("NFSD: xdr error (%s:%d)\n", 1093 __FILE__, __LINE__); 1094 goto xdr_error; 1095 } 1096 argp->rqstp->rq_vec[0].iov_base = p; 1097 argp->rqstp->rq_vec[0].iov_len = avail; 1098 v = 0; 1099 len = write->wr_buflen; 1100 while (len > argp->rqstp->rq_vec[v].iov_len) { 1101 len -= argp->rqstp->rq_vec[v].iov_len; 1102 v++; 1103 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 1104 argp->pagelist++; 1105 if (argp->pagelen >= PAGE_SIZE) { 1106 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 1107 argp->pagelen -= PAGE_SIZE; 1108 } else { 1109 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 1110 argp->pagelen -= len; 1111 } 1112 } 1113 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 1114 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 1115 argp->rqstp->rq_vec[v].iov_len = len; 1116 write->wr_vlen = v+1; 1117 1118 DECODE_TAIL; 1119 } 1120 1121 static __be32 1122 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1123 { 1124 DECODE_HEAD; 1125 1126 READ_BUF(12); 1127 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1128 READ32(rlockowner->rl_owner.len); 1129 READ_BUF(rlockowner->rl_owner.len); 1130 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1131 1132 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1133 return nfserr_inval; 1134 DECODE_TAIL; 1135 } 1136 1137 static __be32 1138 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1139 struct nfsd4_exchange_id *exid) 1140 { 1141 int dummy, tmp; 1142 DECODE_HEAD; 1143 1144 READ_BUF(NFS4_VERIFIER_SIZE); 1145 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1146 1147 status = nfsd4_decode_opaque(argp, &exid->clname); 1148 if (status) 1149 return nfserr_bad_xdr; 1150 1151 READ_BUF(4); 1152 READ32(exid->flags); 1153 1154 /* Ignore state_protect4_a */ 1155 READ_BUF(4); 1156 READ32(exid->spa_how); 1157 switch (exid->spa_how) { 1158 case SP4_NONE: 1159 break; 1160 case SP4_MACH_CRED: 1161 /* spo_must_enforce */ 1162 READ_BUF(4); 1163 READ32(dummy); 1164 READ_BUF(dummy * 4); 1165 p += dummy; 1166 1167 /* spo_must_allow */ 1168 READ_BUF(4); 1169 READ32(dummy); 1170 READ_BUF(dummy * 4); 1171 p += dummy; 1172 break; 1173 case SP4_SSV: 1174 /* ssp_ops */ 1175 READ_BUF(4); 1176 READ32(dummy); 1177 READ_BUF(dummy * 4); 1178 p += dummy; 1179 1180 READ_BUF(4); 1181 READ32(dummy); 1182 READ_BUF(dummy * 4); 1183 p += dummy; 1184 1185 /* ssp_hash_algs<> */ 1186 READ_BUF(4); 1187 READ32(tmp); 1188 while (tmp--) { 1189 READ_BUF(4); 1190 READ32(dummy); 1191 READ_BUF(dummy); 1192 p += XDR_QUADLEN(dummy); 1193 } 1194 1195 /* ssp_encr_algs<> */ 1196 READ_BUF(4); 1197 READ32(tmp); 1198 while (tmp--) { 1199 READ_BUF(4); 1200 READ32(dummy); 1201 READ_BUF(dummy); 1202 p += XDR_QUADLEN(dummy); 1203 } 1204 1205 /* ssp_window and ssp_num_gss_handles */ 1206 READ_BUF(8); 1207 READ32(dummy); 1208 READ32(dummy); 1209 break; 1210 default: 1211 goto xdr_error; 1212 } 1213 1214 /* Ignore Implementation ID */ 1215 READ_BUF(4); /* nfs_impl_id4 array length */ 1216 READ32(dummy); 1217 1218 if (dummy > 1) 1219 goto xdr_error; 1220 1221 if (dummy == 1) { 1222 /* nii_domain */ 1223 READ_BUF(4); 1224 READ32(dummy); 1225 READ_BUF(dummy); 1226 p += XDR_QUADLEN(dummy); 1227 1228 /* nii_name */ 1229 READ_BUF(4); 1230 READ32(dummy); 1231 READ_BUF(dummy); 1232 p += XDR_QUADLEN(dummy); 1233 1234 /* nii_date */ 1235 READ_BUF(12); 1236 p += 3; 1237 } 1238 DECODE_TAIL; 1239 } 1240 1241 static __be32 1242 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1243 struct nfsd4_create_session *sess) 1244 { 1245 DECODE_HEAD; 1246 1247 u32 dummy; 1248 char *machine_name; 1249 int i; 1250 int nr_secflavs; 1251 1252 READ_BUF(16); 1253 COPYMEM(&sess->clientid, 8); 1254 READ32(sess->seqid); 1255 READ32(sess->flags); 1256 1257 /* Fore channel attrs */ 1258 READ_BUF(28); 1259 READ32(dummy); /* headerpadsz is always 0 */ 1260 READ32(sess->fore_channel.maxreq_sz); 1261 READ32(sess->fore_channel.maxresp_sz); 1262 READ32(sess->fore_channel.maxresp_cached); 1263 READ32(sess->fore_channel.maxops); 1264 READ32(sess->fore_channel.maxreqs); 1265 READ32(sess->fore_channel.nr_rdma_attrs); 1266 if (sess->fore_channel.nr_rdma_attrs == 1) { 1267 READ_BUF(4); 1268 READ32(sess->fore_channel.rdma_attrs); 1269 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1270 dprintk("Too many fore channel attr bitmaps!\n"); 1271 goto xdr_error; 1272 } 1273 1274 /* Back channel attrs */ 1275 READ_BUF(28); 1276 READ32(dummy); /* headerpadsz is always 0 */ 1277 READ32(sess->back_channel.maxreq_sz); 1278 READ32(sess->back_channel.maxresp_sz); 1279 READ32(sess->back_channel.maxresp_cached); 1280 READ32(sess->back_channel.maxops); 1281 READ32(sess->back_channel.maxreqs); 1282 READ32(sess->back_channel.nr_rdma_attrs); 1283 if (sess->back_channel.nr_rdma_attrs == 1) { 1284 READ_BUF(4); 1285 READ32(sess->back_channel.rdma_attrs); 1286 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1287 dprintk("Too many back channel attr bitmaps!\n"); 1288 goto xdr_error; 1289 } 1290 1291 READ_BUF(8); 1292 READ32(sess->callback_prog); 1293 1294 /* callback_sec_params4 */ 1295 READ32(nr_secflavs); 1296 for (i = 0; i < nr_secflavs; ++i) { 1297 READ_BUF(4); 1298 READ32(dummy); 1299 switch (dummy) { 1300 case RPC_AUTH_NULL: 1301 /* Nothing to read */ 1302 break; 1303 case RPC_AUTH_UNIX: 1304 READ_BUF(8); 1305 /* stamp */ 1306 READ32(dummy); 1307 1308 /* machine name */ 1309 READ32(dummy); 1310 READ_BUF(dummy); 1311 SAVEMEM(machine_name, dummy); 1312 1313 /* uid, gid */ 1314 READ_BUF(8); 1315 READ32(sess->uid); 1316 READ32(sess->gid); 1317 1318 /* more gids */ 1319 READ_BUF(4); 1320 READ32(dummy); 1321 READ_BUF(dummy * 4); 1322 break; 1323 case RPC_AUTH_GSS: 1324 dprintk("RPC_AUTH_GSS callback secflavor " 1325 "not supported!\n"); 1326 READ_BUF(8); 1327 /* gcbp_service */ 1328 READ32(dummy); 1329 /* gcbp_handle_from_server */ 1330 READ32(dummy); 1331 READ_BUF(dummy); 1332 p += XDR_QUADLEN(dummy); 1333 /* gcbp_handle_from_client */ 1334 READ_BUF(4); 1335 READ32(dummy); 1336 READ_BUF(dummy); 1337 break; 1338 default: 1339 dprintk("Illegal callback secflavor\n"); 1340 return nfserr_inval; 1341 } 1342 } 1343 DECODE_TAIL; 1344 } 1345 1346 static __be32 1347 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1348 struct nfsd4_destroy_session *destroy_session) 1349 { 1350 DECODE_HEAD; 1351 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1352 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1353 1354 DECODE_TAIL; 1355 } 1356 1357 static __be32 1358 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1359 struct nfsd4_free_stateid *free_stateid) 1360 { 1361 DECODE_HEAD; 1362 1363 READ_BUF(sizeof(stateid_t)); 1364 READ32(free_stateid->fr_stateid.si_generation); 1365 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1366 1367 DECODE_TAIL; 1368 } 1369 1370 static __be32 1371 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1372 struct nfsd4_sequence *seq) 1373 { 1374 DECODE_HEAD; 1375 1376 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1377 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1378 READ32(seq->seqid); 1379 READ32(seq->slotid); 1380 READ32(seq->maxslots); 1381 READ32(seq->cachethis); 1382 1383 DECODE_TAIL; 1384 } 1385 1386 static __be32 1387 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1388 { 1389 unsigned int nbytes; 1390 stateid_t si; 1391 int i; 1392 __be32 *p; 1393 __be32 status; 1394 1395 READ_BUF(4); 1396 test_stateid->ts_num_ids = ntohl(*p++); 1397 1398 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t); 1399 if (nbytes > (u32)((char *)argp->end - (char *)argp->p)) 1400 goto xdr_error; 1401 1402 test_stateid->ts_saved_args = argp; 1403 save_buf(argp, &test_stateid->ts_savedp); 1404 1405 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1406 status = nfsd4_decode_stateid(argp, &si); 1407 if (status) 1408 return status; 1409 } 1410 1411 status = 0; 1412 out: 1413 return status; 1414 xdr_error: 1415 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1416 status = nfserr_bad_xdr; 1417 goto out; 1418 } 1419 1420 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1421 { 1422 DECODE_HEAD; 1423 1424 READ_BUF(8); 1425 COPYMEM(&dc->clientid, 8); 1426 1427 DECODE_TAIL; 1428 } 1429 1430 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1431 { 1432 DECODE_HEAD; 1433 1434 READ_BUF(4); 1435 READ32(rc->rca_one_fs); 1436 1437 DECODE_TAIL; 1438 } 1439 1440 static __be32 1441 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1442 { 1443 return nfs_ok; 1444 } 1445 1446 static __be32 1447 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1448 { 1449 return nfserr_notsupp; 1450 } 1451 1452 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1453 1454 static nfsd4_dec nfsd4_dec_ops[] = { 1455 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1456 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1457 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1458 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1459 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1460 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1461 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1462 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1463 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1464 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1465 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1466 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1467 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1468 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1469 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1470 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1471 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1472 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1473 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1474 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1475 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1476 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1477 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1478 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1479 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1480 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1481 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1482 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1483 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1484 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1485 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1486 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1487 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1488 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1489 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1490 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1491 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1492 }; 1493 1494 static nfsd4_dec nfsd41_dec_ops[] = { 1495 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1496 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1497 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1498 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1499 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1500 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1501 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1502 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1503 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1504 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1505 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1506 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1507 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1508 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1509 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1510 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1511 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1512 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1513 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1514 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1515 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1516 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1517 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1518 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1519 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1520 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1521 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1522 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1523 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1524 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1525 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1526 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1527 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1528 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1529 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1530 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1531 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1532 1533 /* new operations for NFSv4.1 */ 1534 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1535 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1536 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1537 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1538 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1539 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1540 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1541 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1542 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1543 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1544 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1545 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1546 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1547 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1548 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1549 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1550 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1551 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1552 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1553 }; 1554 1555 struct nfsd4_minorversion_ops { 1556 nfsd4_dec *decoders; 1557 int nops; 1558 }; 1559 1560 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1561 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1562 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1563 }; 1564 1565 static __be32 1566 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1567 { 1568 DECODE_HEAD; 1569 struct nfsd4_op *op; 1570 struct nfsd4_minorversion_ops *ops; 1571 bool cachethis = false; 1572 int i; 1573 1574 /* 1575 * XXX: According to spec, we should check the tag 1576 * for UTF-8 compliance. I'm postponing this for 1577 * now because it seems that some clients do use 1578 * binary tags. 1579 */ 1580 READ_BUF(4); 1581 READ32(argp->taglen); 1582 READ_BUF(argp->taglen + 8); 1583 SAVEMEM(argp->tag, argp->taglen); 1584 READ32(argp->minorversion); 1585 READ32(argp->opcnt); 1586 1587 if (argp->taglen > NFSD4_MAX_TAGLEN) 1588 goto xdr_error; 1589 if (argp->opcnt > 100) 1590 goto xdr_error; 1591 1592 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1593 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1594 if (!argp->ops) { 1595 argp->ops = argp->iops; 1596 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1597 goto xdr_error; 1598 } 1599 } 1600 1601 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1602 argp->opcnt = 0; 1603 1604 ops = &nfsd4_minorversion[argp->minorversion]; 1605 for (i = 0; i < argp->opcnt; i++) { 1606 op = &argp->ops[i]; 1607 op->replay = NULL; 1608 1609 /* 1610 * We can't use READ_BUF() here because we need to handle 1611 * a missing opcode as an OP_WRITE + 1. So we need to check 1612 * to see if we're truly at the end of our buffer or if there 1613 * is another page we need to flip to. 1614 */ 1615 1616 if (argp->p == argp->end) { 1617 if (argp->pagelen < 4) { 1618 /* There isn't an opcode still on the wire */ 1619 op->opnum = OP_WRITE + 1; 1620 op->status = nfserr_bad_xdr; 1621 argp->opcnt = i+1; 1622 break; 1623 } 1624 1625 /* 1626 * False alarm. We just hit a page boundary, but there 1627 * is still data available. Move pointer across page 1628 * boundary. *snip from READ_BUF* 1629 */ 1630 argp->p = page_address(argp->pagelist[0]); 1631 argp->pagelist++; 1632 if (argp->pagelen < PAGE_SIZE) { 1633 argp->end = argp->p + (argp->pagelen>>2); 1634 argp->pagelen = 0; 1635 } else { 1636 argp->end = argp->p + (PAGE_SIZE>>2); 1637 argp->pagelen -= PAGE_SIZE; 1638 } 1639 } 1640 op->opnum = ntohl(*argp->p++); 1641 1642 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1643 op->status = ops->decoders[op->opnum](argp, &op->u); 1644 else { 1645 op->opnum = OP_ILLEGAL; 1646 op->status = nfserr_op_illegal; 1647 } 1648 1649 if (op->status) { 1650 argp->opcnt = i+1; 1651 break; 1652 } 1653 /* 1654 * We'll try to cache the result in the DRC if any one 1655 * op in the compound wants to be cached: 1656 */ 1657 cachethis |= nfsd4_cache_this_op(op); 1658 } 1659 /* Sessions make the DRC unnecessary: */ 1660 if (argp->minorversion) 1661 cachethis = false; 1662 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1663 1664 DECODE_TAIL; 1665 } 1666 1667 #define WRITE32(n) *p++ = htonl(n) 1668 #define WRITE64(n) do { \ 1669 *p++ = htonl((u32)((n) >> 32)); \ 1670 *p++ = htonl((u32)(n)); \ 1671 } while (0) 1672 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1673 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1674 memcpy(p, ptr, nbytes); \ 1675 p += XDR_QUADLEN(nbytes); \ 1676 }} while (0) 1677 1678 static void write32(__be32 **p, u32 n) 1679 { 1680 *(*p)++ = n; 1681 } 1682 1683 static void write64(__be32 **p, u64 n) 1684 { 1685 write32(p, (u32)(n >> 32)); 1686 write32(p, (u32)n); 1687 } 1688 1689 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1690 { 1691 if (IS_I_VERSION(inode)) { 1692 write64(p, inode->i_version); 1693 } else { 1694 write32(p, stat->ctime.tv_sec); 1695 write32(p, stat->ctime.tv_nsec); 1696 } 1697 } 1698 1699 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1700 { 1701 write32(p, c->atomic); 1702 if (c->change_supported) { 1703 write64(p, c->before_change); 1704 write64(p, c->after_change); 1705 } else { 1706 write32(p, c->before_ctime_sec); 1707 write32(p, c->before_ctime_nsec); 1708 write32(p, c->after_ctime_sec); 1709 write32(p, c->after_ctime_nsec); 1710 } 1711 } 1712 1713 #define RESERVE_SPACE(nbytes) do { \ 1714 p = resp->p; \ 1715 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1716 } while (0) 1717 #define ADJUST_ARGS() resp->p = p 1718 1719 /* 1720 * Header routine to setup seqid operation replay cache 1721 */ 1722 #define ENCODE_SEQID_OP_HEAD \ 1723 __be32 *save; \ 1724 \ 1725 save = resp->p; 1726 1727 /* 1728 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1729 * is where sequence id's are incremented, and the replay cache is filled. 1730 * Note that we increment sequence id's here, at the last moment, so we're sure 1731 * we know whether the error to be returned is a sequence id mutating error. 1732 */ 1733 1734 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr) 1735 { 1736 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner; 1737 1738 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) { 1739 stateowner->so_seqid++; 1740 stateowner->so_replay.rp_status = nfserr; 1741 stateowner->so_replay.rp_buflen = 1742 (char *)resp->p - (char *)save; 1743 memcpy(stateowner->so_replay.rp_buf, save, 1744 stateowner->so_replay.rp_buflen); 1745 nfsd4_purge_closed_stateid(stateowner); 1746 } 1747 } 1748 1749 /* Encode as an array of strings the string given with components 1750 * separated @sep. 1751 */ 1752 static __be32 nfsd4_encode_components(char sep, char *components, 1753 __be32 **pp, int *buflen) 1754 { 1755 __be32 *p = *pp; 1756 __be32 *countp = p; 1757 int strlen, count=0; 1758 char *str, *end; 1759 1760 dprintk("nfsd4_encode_components(%s)\n", components); 1761 if ((*buflen -= 4) < 0) 1762 return nfserr_resource; 1763 WRITE32(0); /* We will fill this in with @count later */ 1764 end = str = components; 1765 while (*end) { 1766 for (; *end && (*end != sep); end++) 1767 ; /* Point to end of component */ 1768 strlen = end - str; 1769 if (strlen) { 1770 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1771 return nfserr_resource; 1772 WRITE32(strlen); 1773 WRITEMEM(str, strlen); 1774 count++; 1775 } 1776 else 1777 end++; 1778 str = end; 1779 } 1780 *pp = p; 1781 p = countp; 1782 WRITE32(count); 1783 return 0; 1784 } 1785 1786 /* 1787 * encode a location element of a fs_locations structure 1788 */ 1789 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1790 __be32 **pp, int *buflen) 1791 { 1792 __be32 status; 1793 __be32 *p = *pp; 1794 1795 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1796 if (status) 1797 return status; 1798 status = nfsd4_encode_components('/', location->path, &p, buflen); 1799 if (status) 1800 return status; 1801 *pp = p; 1802 return 0; 1803 } 1804 1805 /* 1806 * Encode a path in RFC3530 'pathname4' format 1807 */ 1808 static __be32 nfsd4_encode_path(const struct path *root, 1809 const struct path *path, __be32 **pp, int *buflen) 1810 { 1811 struct path cur = { 1812 .mnt = path->mnt, 1813 .dentry = path->dentry, 1814 }; 1815 __be32 *p = *pp; 1816 struct dentry **components = NULL; 1817 unsigned int ncomponents = 0; 1818 __be32 err = nfserr_jukebox; 1819 1820 dprintk("nfsd4_encode_components("); 1821 1822 path_get(&cur); 1823 /* First walk the path up to the nfsd root, and store the 1824 * dentries/path components in an array. 1825 */ 1826 for (;;) { 1827 if (cur.dentry == root->dentry && cur.mnt == root->mnt) 1828 break; 1829 if (cur.dentry == cur.mnt->mnt_root) { 1830 if (follow_up(&cur)) 1831 continue; 1832 goto out_free; 1833 } 1834 if ((ncomponents & 15) == 0) { 1835 struct dentry **new; 1836 new = krealloc(components, 1837 sizeof(*new) * (ncomponents + 16), 1838 GFP_KERNEL); 1839 if (!new) 1840 goto out_free; 1841 components = new; 1842 } 1843 components[ncomponents++] = cur.dentry; 1844 cur.dentry = dget_parent(cur.dentry); 1845 } 1846 1847 *buflen -= 4; 1848 if (*buflen < 0) 1849 goto out_free; 1850 WRITE32(ncomponents); 1851 1852 while (ncomponents) { 1853 struct dentry *dentry = components[ncomponents - 1]; 1854 unsigned int len = dentry->d_name.len; 1855 1856 *buflen -= 4 + (XDR_QUADLEN(len) << 2); 1857 if (*buflen < 0) 1858 goto out_free; 1859 WRITE32(len); 1860 WRITEMEM(dentry->d_name.name, len); 1861 dprintk("/%s", dentry->d_name.name); 1862 dput(dentry); 1863 ncomponents--; 1864 } 1865 1866 *pp = p; 1867 err = 0; 1868 out_free: 1869 dprintk(")\n"); 1870 while (ncomponents) 1871 dput(components[--ncomponents]); 1872 kfree(components); 1873 path_put(&cur); 1874 return err; 1875 } 1876 1877 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, 1878 const struct path *path, __be32 **pp, int *buflen) 1879 { 1880 struct svc_export *exp_ps; 1881 __be32 res; 1882 1883 exp_ps = rqst_find_fsidzero_export(rqstp); 1884 if (IS_ERR(exp_ps)) 1885 return nfserrno(PTR_ERR(exp_ps)); 1886 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); 1887 exp_put(exp_ps); 1888 return res; 1889 } 1890 1891 /* 1892 * encode a fs_locations structure 1893 */ 1894 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1895 struct svc_export *exp, 1896 __be32 **pp, int *buflen) 1897 { 1898 __be32 status; 1899 int i; 1900 __be32 *p = *pp; 1901 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1902 1903 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); 1904 if (status) 1905 return status; 1906 if ((*buflen -= 4) < 0) 1907 return nfserr_resource; 1908 WRITE32(fslocs->locations_count); 1909 for (i=0; i<fslocs->locations_count; i++) { 1910 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1911 &p, buflen); 1912 if (status) 1913 return status; 1914 } 1915 *pp = p; 1916 return 0; 1917 } 1918 1919 static u32 nfs4_file_type(umode_t mode) 1920 { 1921 switch (mode & S_IFMT) { 1922 case S_IFIFO: return NF4FIFO; 1923 case S_IFCHR: return NF4CHR; 1924 case S_IFDIR: return NF4DIR; 1925 case S_IFBLK: return NF4BLK; 1926 case S_IFLNK: return NF4LNK; 1927 case S_IFREG: return NF4REG; 1928 case S_IFSOCK: return NF4SOCK; 1929 default: return NF4BAD; 1930 }; 1931 } 1932 1933 static __be32 1934 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1935 __be32 **p, int *buflen) 1936 { 1937 int status; 1938 1939 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1940 return nfserr_resource; 1941 if (whotype != NFS4_ACL_WHO_NAMED) 1942 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1943 else if (group) 1944 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1945 else 1946 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1947 if (status < 0) 1948 return nfserrno(status); 1949 *p = xdr_encode_opaque(*p, NULL, status); 1950 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1951 BUG_ON(*buflen < 0); 1952 return 0; 1953 } 1954 1955 static inline __be32 1956 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1957 { 1958 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1959 } 1960 1961 static inline __be32 1962 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1963 { 1964 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1965 } 1966 1967 static inline __be32 1968 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1969 __be32 **p, int *buflen) 1970 { 1971 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1972 } 1973 1974 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1975 FATTR4_WORD0_RDATTR_ERROR) 1976 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1977 1978 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1979 { 1980 /* As per referral draft: */ 1981 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1982 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1983 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1984 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1985 *rdattr_err = NFSERR_MOVED; 1986 else 1987 return nfserr_moved; 1988 } 1989 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1990 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1991 return 0; 1992 } 1993 1994 /* 1995 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1996 * ourselves. 1997 * 1998 * @countp is the buffer size in _words_; upon successful return this becomes 1999 * replaced with the number of words written. 2000 */ 2001 __be32 2002 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 2003 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 2004 struct svc_rqst *rqstp, int ignore_crossmnt) 2005 { 2006 u32 bmval0 = bmval[0]; 2007 u32 bmval1 = bmval[1]; 2008 u32 bmval2 = bmval[2]; 2009 struct kstat stat; 2010 struct svc_fh tempfh; 2011 struct kstatfs statfs; 2012 int buflen = *countp << 2; 2013 __be32 *attrlenp; 2014 u32 dummy; 2015 u64 dummy64; 2016 u32 rdattr_err = 0; 2017 __be32 *p = buffer; 2018 __be32 status; 2019 int err; 2020 int aclsupport = 0; 2021 struct nfs4_acl *acl = NULL; 2022 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2023 u32 minorversion = resp->cstate.minorversion; 2024 struct path path = { 2025 .mnt = exp->ex_path.mnt, 2026 .dentry = dentry, 2027 }; 2028 2029 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2030 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2031 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2032 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2033 2034 if (exp->ex_fslocs.migrated) { 2035 BUG_ON(bmval[2]); 2036 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 2037 if (status) 2038 goto out; 2039 } 2040 2041 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 2042 if (err) 2043 goto out_nfserr; 2044 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 2045 FATTR4_WORD0_MAXNAME)) || 2046 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2047 FATTR4_WORD1_SPACE_TOTAL))) { 2048 err = vfs_statfs(&path, &statfs); 2049 if (err) 2050 goto out_nfserr; 2051 } 2052 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2053 fh_init(&tempfh, NFS4_FHSIZE); 2054 status = fh_compose(&tempfh, exp, dentry, NULL); 2055 if (status) 2056 goto out; 2057 fhp = &tempfh; 2058 } 2059 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 2060 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 2061 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2062 aclsupport = (err == 0); 2063 if (bmval0 & FATTR4_WORD0_ACL) { 2064 if (err == -EOPNOTSUPP) 2065 bmval0 &= ~FATTR4_WORD0_ACL; 2066 else if (err == -EINVAL) { 2067 status = nfserr_attrnotsupp; 2068 goto out; 2069 } else if (err != 0) 2070 goto out_nfserr; 2071 } 2072 } 2073 2074 if (bmval2) { 2075 if ((buflen -= 16) < 0) 2076 goto out_resource; 2077 WRITE32(3); 2078 WRITE32(bmval0); 2079 WRITE32(bmval1); 2080 WRITE32(bmval2); 2081 } else if (bmval1) { 2082 if ((buflen -= 12) < 0) 2083 goto out_resource; 2084 WRITE32(2); 2085 WRITE32(bmval0); 2086 WRITE32(bmval1); 2087 } else { 2088 if ((buflen -= 8) < 0) 2089 goto out_resource; 2090 WRITE32(1); 2091 WRITE32(bmval0); 2092 } 2093 attrlenp = p++; /* to be backfilled later */ 2094 2095 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2096 u32 word0 = nfsd_suppattrs0(minorversion); 2097 u32 word1 = nfsd_suppattrs1(minorversion); 2098 u32 word2 = nfsd_suppattrs2(minorversion); 2099 2100 if (!aclsupport) 2101 word0 &= ~FATTR4_WORD0_ACL; 2102 if (!word2) { 2103 if ((buflen -= 12) < 0) 2104 goto out_resource; 2105 WRITE32(2); 2106 WRITE32(word0); 2107 WRITE32(word1); 2108 } else { 2109 if ((buflen -= 16) < 0) 2110 goto out_resource; 2111 WRITE32(3); 2112 WRITE32(word0); 2113 WRITE32(word1); 2114 WRITE32(word2); 2115 } 2116 } 2117 if (bmval0 & FATTR4_WORD0_TYPE) { 2118 if ((buflen -= 4) < 0) 2119 goto out_resource; 2120 dummy = nfs4_file_type(stat.mode); 2121 if (dummy == NF4BAD) 2122 goto out_serverfault; 2123 WRITE32(dummy); 2124 } 2125 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2126 if ((buflen -= 4) < 0) 2127 goto out_resource; 2128 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2129 WRITE32(NFS4_FH_PERSISTENT); 2130 else 2131 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 2132 } 2133 if (bmval0 & FATTR4_WORD0_CHANGE) { 2134 if ((buflen -= 8) < 0) 2135 goto out_resource; 2136 write_change(&p, &stat, dentry->d_inode); 2137 } 2138 if (bmval0 & FATTR4_WORD0_SIZE) { 2139 if ((buflen -= 8) < 0) 2140 goto out_resource; 2141 WRITE64(stat.size); 2142 } 2143 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2144 if ((buflen -= 4) < 0) 2145 goto out_resource; 2146 WRITE32(1); 2147 } 2148 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2149 if ((buflen -= 4) < 0) 2150 goto out_resource; 2151 WRITE32(1); 2152 } 2153 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2154 if ((buflen -= 4) < 0) 2155 goto out_resource; 2156 WRITE32(0); 2157 } 2158 if (bmval0 & FATTR4_WORD0_FSID) { 2159 if ((buflen -= 16) < 0) 2160 goto out_resource; 2161 if (exp->ex_fslocs.migrated) { 2162 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 2163 WRITE64(NFS4_REFERRAL_FSID_MINOR); 2164 } else switch(fsid_source(fhp)) { 2165 case FSIDSOURCE_FSID: 2166 WRITE64((u64)exp->ex_fsid); 2167 WRITE64((u64)0); 2168 break; 2169 case FSIDSOURCE_DEV: 2170 WRITE32(0); 2171 WRITE32(MAJOR(stat.dev)); 2172 WRITE32(0); 2173 WRITE32(MINOR(stat.dev)); 2174 break; 2175 case FSIDSOURCE_UUID: 2176 WRITEMEM(exp->ex_uuid, 16); 2177 break; 2178 } 2179 } 2180 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2181 if ((buflen -= 4) < 0) 2182 goto out_resource; 2183 WRITE32(0); 2184 } 2185 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2186 if ((buflen -= 4) < 0) 2187 goto out_resource; 2188 WRITE32(nfsd4_lease); 2189 } 2190 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2191 if ((buflen -= 4) < 0) 2192 goto out_resource; 2193 WRITE32(rdattr_err); 2194 } 2195 if (bmval0 & FATTR4_WORD0_ACL) { 2196 struct nfs4_ace *ace; 2197 2198 if (acl == NULL) { 2199 if ((buflen -= 4) < 0) 2200 goto out_resource; 2201 2202 WRITE32(0); 2203 goto out_acl; 2204 } 2205 if ((buflen -= 4) < 0) 2206 goto out_resource; 2207 WRITE32(acl->naces); 2208 2209 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2210 if ((buflen -= 4*3) < 0) 2211 goto out_resource; 2212 WRITE32(ace->type); 2213 WRITE32(ace->flag); 2214 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 2215 status = nfsd4_encode_aclname(rqstp, ace->whotype, 2216 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 2217 &p, &buflen); 2218 if (status == nfserr_resource) 2219 goto out_resource; 2220 if (status) 2221 goto out; 2222 } 2223 } 2224 out_acl: 2225 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2226 if ((buflen -= 4) < 0) 2227 goto out_resource; 2228 WRITE32(aclsupport ? 2229 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2230 } 2231 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2232 if ((buflen -= 4) < 0) 2233 goto out_resource; 2234 WRITE32(1); 2235 } 2236 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2237 if ((buflen -= 4) < 0) 2238 goto out_resource; 2239 WRITE32(1); 2240 } 2241 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2242 if ((buflen -= 4) < 0) 2243 goto out_resource; 2244 WRITE32(1); 2245 } 2246 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2247 if ((buflen -= 4) < 0) 2248 goto out_resource; 2249 WRITE32(1); 2250 } 2251 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2252 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 2253 if (buflen < 0) 2254 goto out_resource; 2255 WRITE32(fhp->fh_handle.fh_size); 2256 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 2257 } 2258 if (bmval0 & FATTR4_WORD0_FILEID) { 2259 if ((buflen -= 8) < 0) 2260 goto out_resource; 2261 WRITE64(stat.ino); 2262 } 2263 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2264 if ((buflen -= 8) < 0) 2265 goto out_resource; 2266 WRITE64((u64) statfs.f_ffree); 2267 } 2268 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2269 if ((buflen -= 8) < 0) 2270 goto out_resource; 2271 WRITE64((u64) statfs.f_ffree); 2272 } 2273 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2274 if ((buflen -= 8) < 0) 2275 goto out_resource; 2276 WRITE64((u64) statfs.f_files); 2277 } 2278 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2279 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 2280 if (status == nfserr_resource) 2281 goto out_resource; 2282 if (status) 2283 goto out; 2284 } 2285 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2286 if ((buflen -= 4) < 0) 2287 goto out_resource; 2288 WRITE32(1); 2289 } 2290 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2291 if ((buflen -= 8) < 0) 2292 goto out_resource; 2293 WRITE64(~(u64)0); 2294 } 2295 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2296 if ((buflen -= 4) < 0) 2297 goto out_resource; 2298 WRITE32(255); 2299 } 2300 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2301 if ((buflen -= 4) < 0) 2302 goto out_resource; 2303 WRITE32(statfs.f_namelen); 2304 } 2305 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2306 if ((buflen -= 8) < 0) 2307 goto out_resource; 2308 WRITE64((u64) svc_max_payload(rqstp)); 2309 } 2310 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2311 if ((buflen -= 8) < 0) 2312 goto out_resource; 2313 WRITE64((u64) svc_max_payload(rqstp)); 2314 } 2315 if (bmval1 & FATTR4_WORD1_MODE) { 2316 if ((buflen -= 4) < 0) 2317 goto out_resource; 2318 WRITE32(stat.mode & S_IALLUGO); 2319 } 2320 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2321 if ((buflen -= 4) < 0) 2322 goto out_resource; 2323 WRITE32(1); 2324 } 2325 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2326 if ((buflen -= 4) < 0) 2327 goto out_resource; 2328 WRITE32(stat.nlink); 2329 } 2330 if (bmval1 & FATTR4_WORD1_OWNER) { 2331 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2332 if (status == nfserr_resource) 2333 goto out_resource; 2334 if (status) 2335 goto out; 2336 } 2337 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2338 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2339 if (status == nfserr_resource) 2340 goto out_resource; 2341 if (status) 2342 goto out; 2343 } 2344 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2345 if ((buflen -= 8) < 0) 2346 goto out_resource; 2347 WRITE32((u32) MAJOR(stat.rdev)); 2348 WRITE32((u32) MINOR(stat.rdev)); 2349 } 2350 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2351 if ((buflen -= 8) < 0) 2352 goto out_resource; 2353 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2354 WRITE64(dummy64); 2355 } 2356 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2357 if ((buflen -= 8) < 0) 2358 goto out_resource; 2359 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2360 WRITE64(dummy64); 2361 } 2362 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2363 if ((buflen -= 8) < 0) 2364 goto out_resource; 2365 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2366 WRITE64(dummy64); 2367 } 2368 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2369 if ((buflen -= 8) < 0) 2370 goto out_resource; 2371 dummy64 = (u64)stat.blocks << 9; 2372 WRITE64(dummy64); 2373 } 2374 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2375 if ((buflen -= 12) < 0) 2376 goto out_resource; 2377 WRITE32(0); 2378 WRITE32(stat.atime.tv_sec); 2379 WRITE32(stat.atime.tv_nsec); 2380 } 2381 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2382 if ((buflen -= 12) < 0) 2383 goto out_resource; 2384 WRITE32(0); 2385 WRITE32(1); 2386 WRITE32(0); 2387 } 2388 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2389 if ((buflen -= 12) < 0) 2390 goto out_resource; 2391 WRITE32(0); 2392 WRITE32(stat.ctime.tv_sec); 2393 WRITE32(stat.ctime.tv_nsec); 2394 } 2395 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2396 if ((buflen -= 12) < 0) 2397 goto out_resource; 2398 WRITE32(0); 2399 WRITE32(stat.mtime.tv_sec); 2400 WRITE32(stat.mtime.tv_nsec); 2401 } 2402 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2403 if ((buflen -= 8) < 0) 2404 goto out_resource; 2405 /* 2406 * Get parent's attributes if not ignoring crossmount 2407 * and this is the root of a cross-mounted filesystem. 2408 */ 2409 if (ignore_crossmnt == 0 && 2410 dentry == exp->ex_path.mnt->mnt_root) { 2411 struct path path = exp->ex_path; 2412 path_get(&path); 2413 while (follow_up(&path)) { 2414 if (path.dentry != path.mnt->mnt_root) 2415 break; 2416 } 2417 err = vfs_getattr(path.mnt, path.dentry, &stat); 2418 path_put(&path); 2419 if (err) 2420 goto out_nfserr; 2421 } 2422 WRITE64(stat.ino); 2423 } 2424 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2425 WRITE32(3); 2426 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2427 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2428 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2429 } 2430 2431 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2432 *countp = p - buffer; 2433 status = nfs_ok; 2434 2435 out: 2436 kfree(acl); 2437 if (fhp == &tempfh) 2438 fh_put(&tempfh); 2439 return status; 2440 out_nfserr: 2441 status = nfserrno(err); 2442 goto out; 2443 out_resource: 2444 *countp = 0; 2445 status = nfserr_resource; 2446 goto out; 2447 out_serverfault: 2448 status = nfserr_serverfault; 2449 goto out; 2450 } 2451 2452 static inline int attributes_need_mount(u32 *bmval) 2453 { 2454 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2455 return 1; 2456 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2457 return 1; 2458 return 0; 2459 } 2460 2461 static __be32 2462 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2463 const char *name, int namlen, __be32 *p, int *buflen) 2464 { 2465 struct svc_export *exp = cd->rd_fhp->fh_export; 2466 struct dentry *dentry; 2467 __be32 nfserr; 2468 int ignore_crossmnt = 0; 2469 2470 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2471 if (IS_ERR(dentry)) 2472 return nfserrno(PTR_ERR(dentry)); 2473 if (!dentry->d_inode) { 2474 /* 2475 * nfsd_buffered_readdir drops the i_mutex between 2476 * readdir and calling this callback, leaving a window 2477 * where this directory entry could have gone away. 2478 */ 2479 dput(dentry); 2480 return nfserr_noent; 2481 } 2482 2483 exp_get(exp); 2484 /* 2485 * In the case of a mountpoint, the client may be asking for 2486 * attributes that are only properties of the underlying filesystem 2487 * as opposed to the cross-mounted file system. In such a case, 2488 * we will not follow the cross mount and will fill the attribtutes 2489 * directly from the mountpoint dentry. 2490 */ 2491 if (nfsd_mountpoint(dentry, exp)) { 2492 int err; 2493 2494 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2495 && !attributes_need_mount(cd->rd_bmval)) { 2496 ignore_crossmnt = 1; 2497 goto out_encode; 2498 } 2499 /* 2500 * Why the heck aren't we just using nfsd_lookup?? 2501 * Different "."/".." handling? Something else? 2502 * At least, add a comment here to explain.... 2503 */ 2504 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2505 if (err) { 2506 nfserr = nfserrno(err); 2507 goto out_put; 2508 } 2509 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2510 if (nfserr) 2511 goto out_put; 2512 2513 } 2514 out_encode: 2515 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2516 cd->rd_rqstp, ignore_crossmnt); 2517 out_put: 2518 dput(dentry); 2519 exp_put(exp); 2520 return nfserr; 2521 } 2522 2523 static __be32 * 2524 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2525 { 2526 __be32 *attrlenp; 2527 2528 if (buflen < 6) 2529 return NULL; 2530 *p++ = htonl(2); 2531 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2532 *p++ = htonl(0); /* bmval1 */ 2533 2534 attrlenp = p++; 2535 *p++ = nfserr; /* no htonl */ 2536 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2537 return p; 2538 } 2539 2540 static int 2541 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2542 loff_t offset, u64 ino, unsigned int d_type) 2543 { 2544 struct readdir_cd *ccd = ccdv; 2545 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2546 int buflen; 2547 __be32 *p = cd->buffer; 2548 __be32 *cookiep; 2549 __be32 nfserr = nfserr_toosmall; 2550 2551 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2552 if (name && isdotent(name, namlen)) { 2553 cd->common.err = nfs_ok; 2554 return 0; 2555 } 2556 2557 if (cd->offset) 2558 xdr_encode_hyper(cd->offset, (u64) offset); 2559 2560 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2561 if (buflen < 0) 2562 goto fail; 2563 2564 *p++ = xdr_one; /* mark entry present */ 2565 cookiep = p; 2566 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2567 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2568 2569 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2570 switch (nfserr) { 2571 case nfs_ok: 2572 p += buflen; 2573 break; 2574 case nfserr_resource: 2575 nfserr = nfserr_toosmall; 2576 goto fail; 2577 case nfserr_noent: 2578 goto skip_entry; 2579 default: 2580 /* 2581 * If the client requested the RDATTR_ERROR attribute, 2582 * we stuff the error code into this attribute 2583 * and continue. If this attribute was not requested, 2584 * then in accordance with the spec, we fail the 2585 * entire READDIR operation(!) 2586 */ 2587 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2588 goto fail; 2589 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2590 if (p == NULL) { 2591 nfserr = nfserr_toosmall; 2592 goto fail; 2593 } 2594 } 2595 cd->buflen -= (p - cd->buffer); 2596 cd->buffer = p; 2597 cd->offset = cookiep; 2598 skip_entry: 2599 cd->common.err = nfs_ok; 2600 return 0; 2601 fail: 2602 cd->common.err = nfserr; 2603 return -EINVAL; 2604 } 2605 2606 static void 2607 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2608 { 2609 __be32 *p; 2610 2611 RESERVE_SPACE(sizeof(stateid_t)); 2612 WRITE32(sid->si_generation); 2613 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2614 ADJUST_ARGS(); 2615 } 2616 2617 static __be32 2618 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2619 { 2620 __be32 *p; 2621 2622 if (!nfserr) { 2623 RESERVE_SPACE(8); 2624 WRITE32(access->ac_supported); 2625 WRITE32(access->ac_resp_access); 2626 ADJUST_ARGS(); 2627 } 2628 return nfserr; 2629 } 2630 2631 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2632 { 2633 __be32 *p; 2634 2635 if (!nfserr) { 2636 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); 2637 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2638 WRITE32(bcts->dir); 2639 /* XXX: ? */ 2640 WRITE32(0); 2641 ADJUST_ARGS(); 2642 } 2643 return nfserr; 2644 } 2645 2646 static __be32 2647 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2648 { 2649 ENCODE_SEQID_OP_HEAD; 2650 2651 if (!nfserr) 2652 nfsd4_encode_stateid(resp, &close->cl_stateid); 2653 2654 encode_seqid_op_tail(resp, save, nfserr); 2655 return nfserr; 2656 } 2657 2658 2659 static __be32 2660 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2661 { 2662 __be32 *p; 2663 2664 if (!nfserr) { 2665 RESERVE_SPACE(8); 2666 WRITEMEM(commit->co_verf.data, 8); 2667 ADJUST_ARGS(); 2668 } 2669 return nfserr; 2670 } 2671 2672 static __be32 2673 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2674 { 2675 __be32 *p; 2676 2677 if (!nfserr) { 2678 RESERVE_SPACE(32); 2679 write_cinfo(&p, &create->cr_cinfo); 2680 WRITE32(2); 2681 WRITE32(create->cr_bmval[0]); 2682 WRITE32(create->cr_bmval[1]); 2683 ADJUST_ARGS(); 2684 } 2685 return nfserr; 2686 } 2687 2688 static __be32 2689 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2690 { 2691 struct svc_fh *fhp = getattr->ga_fhp; 2692 int buflen; 2693 2694 if (nfserr) 2695 return nfserr; 2696 2697 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2698 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2699 resp->p, &buflen, getattr->ga_bmval, 2700 resp->rqstp, 0); 2701 if (!nfserr) 2702 resp->p += buflen; 2703 return nfserr; 2704 } 2705 2706 static __be32 2707 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2708 { 2709 struct svc_fh *fhp = *fhpp; 2710 unsigned int len; 2711 __be32 *p; 2712 2713 if (!nfserr) { 2714 len = fhp->fh_handle.fh_size; 2715 RESERVE_SPACE(len + 4); 2716 WRITE32(len); 2717 WRITEMEM(&fhp->fh_handle.fh_base, len); 2718 ADJUST_ARGS(); 2719 } 2720 return nfserr; 2721 } 2722 2723 /* 2724 * Including all fields other than the name, a LOCK4denied structure requires 2725 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2726 */ 2727 static void 2728 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2729 { 2730 struct xdr_netobj *conf = &ld->ld_owner; 2731 __be32 *p; 2732 2733 RESERVE_SPACE(32 + XDR_LEN(conf->len)); 2734 WRITE64(ld->ld_start); 2735 WRITE64(ld->ld_length); 2736 WRITE32(ld->ld_type); 2737 if (conf->len) { 2738 WRITEMEM(&ld->ld_clientid, 8); 2739 WRITE32(conf->len); 2740 WRITEMEM(conf->data, conf->len); 2741 kfree(conf->data); 2742 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2743 WRITE64((u64)0); /* clientid */ 2744 WRITE32(0); /* length of owner name */ 2745 } 2746 ADJUST_ARGS(); 2747 } 2748 2749 static __be32 2750 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2751 { 2752 ENCODE_SEQID_OP_HEAD; 2753 2754 if (!nfserr) 2755 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2756 else if (nfserr == nfserr_denied) 2757 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2758 2759 encode_seqid_op_tail(resp, save, nfserr); 2760 return nfserr; 2761 } 2762 2763 static __be32 2764 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2765 { 2766 if (nfserr == nfserr_denied) 2767 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2768 return nfserr; 2769 } 2770 2771 static __be32 2772 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2773 { 2774 ENCODE_SEQID_OP_HEAD; 2775 2776 if (!nfserr) 2777 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2778 2779 encode_seqid_op_tail(resp, save, nfserr); 2780 return nfserr; 2781 } 2782 2783 2784 static __be32 2785 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2786 { 2787 __be32 *p; 2788 2789 if (!nfserr) { 2790 RESERVE_SPACE(20); 2791 write_cinfo(&p, &link->li_cinfo); 2792 ADJUST_ARGS(); 2793 } 2794 return nfserr; 2795 } 2796 2797 2798 static __be32 2799 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2800 { 2801 __be32 *p; 2802 ENCODE_SEQID_OP_HEAD; 2803 2804 if (nfserr) 2805 goto out; 2806 2807 nfsd4_encode_stateid(resp, &open->op_stateid); 2808 RESERVE_SPACE(40); 2809 write_cinfo(&p, &open->op_cinfo); 2810 WRITE32(open->op_rflags); 2811 WRITE32(2); 2812 WRITE32(open->op_bmval[0]); 2813 WRITE32(open->op_bmval[1]); 2814 WRITE32(open->op_delegate_type); 2815 ADJUST_ARGS(); 2816 2817 switch (open->op_delegate_type) { 2818 case NFS4_OPEN_DELEGATE_NONE: 2819 break; 2820 case NFS4_OPEN_DELEGATE_READ: 2821 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2822 RESERVE_SPACE(20); 2823 WRITE32(open->op_recall); 2824 2825 /* 2826 * TODO: ACE's in delegations 2827 */ 2828 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2829 WRITE32(0); 2830 WRITE32(0); 2831 WRITE32(0); /* XXX: is NULL principal ok? */ 2832 ADJUST_ARGS(); 2833 break; 2834 case NFS4_OPEN_DELEGATE_WRITE: 2835 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2836 RESERVE_SPACE(32); 2837 WRITE32(0); 2838 2839 /* 2840 * TODO: space_limit's in delegations 2841 */ 2842 WRITE32(NFS4_LIMIT_SIZE); 2843 WRITE32(~(u32)0); 2844 WRITE32(~(u32)0); 2845 2846 /* 2847 * TODO: ACE's in delegations 2848 */ 2849 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2850 WRITE32(0); 2851 WRITE32(0); 2852 WRITE32(0); /* XXX: is NULL principal ok? */ 2853 ADJUST_ARGS(); 2854 break; 2855 default: 2856 BUG(); 2857 } 2858 /* XXX save filehandle here */ 2859 out: 2860 encode_seqid_op_tail(resp, save, nfserr); 2861 return nfserr; 2862 } 2863 2864 static __be32 2865 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2866 { 2867 ENCODE_SEQID_OP_HEAD; 2868 2869 if (!nfserr) 2870 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2871 2872 encode_seqid_op_tail(resp, save, nfserr); 2873 return nfserr; 2874 } 2875 2876 static __be32 2877 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2878 { 2879 ENCODE_SEQID_OP_HEAD; 2880 2881 if (!nfserr) 2882 nfsd4_encode_stateid(resp, &od->od_stateid); 2883 2884 encode_seqid_op_tail(resp, save, nfserr); 2885 return nfserr; 2886 } 2887 2888 static __be32 2889 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2890 struct nfsd4_read *read) 2891 { 2892 u32 eof; 2893 int v, pn; 2894 unsigned long maxcount; 2895 long len; 2896 __be32 *p; 2897 2898 if (nfserr) 2899 return nfserr; 2900 if (resp->xbuf->page_len) 2901 return nfserr_resource; 2902 2903 RESERVE_SPACE(8); /* eof flag and byte count */ 2904 2905 maxcount = svc_max_payload(resp->rqstp); 2906 if (maxcount > read->rd_length) 2907 maxcount = read->rd_length; 2908 2909 len = maxcount; 2910 v = 0; 2911 while (len > 0) { 2912 pn = resp->rqstp->rq_resused++; 2913 resp->rqstp->rq_vec[v].iov_base = 2914 page_address(resp->rqstp->rq_respages[pn]); 2915 resp->rqstp->rq_vec[v].iov_len = 2916 len < PAGE_SIZE ? len : PAGE_SIZE; 2917 v++; 2918 len -= PAGE_SIZE; 2919 } 2920 read->rd_vlen = v; 2921 2922 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2923 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2924 &maxcount); 2925 2926 if (nfserr) 2927 return nfserr; 2928 eof = (read->rd_offset + maxcount >= 2929 read->rd_fhp->fh_dentry->d_inode->i_size); 2930 2931 WRITE32(eof); 2932 WRITE32(maxcount); 2933 ADJUST_ARGS(); 2934 resp->xbuf->head[0].iov_len = (char*)p 2935 - (char*)resp->xbuf->head[0].iov_base; 2936 resp->xbuf->page_len = maxcount; 2937 2938 /* Use rest of head for padding and remaining ops: */ 2939 resp->xbuf->tail[0].iov_base = p; 2940 resp->xbuf->tail[0].iov_len = 0; 2941 if (maxcount&3) { 2942 RESERVE_SPACE(4); 2943 WRITE32(0); 2944 resp->xbuf->tail[0].iov_base += maxcount&3; 2945 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2946 ADJUST_ARGS(); 2947 } 2948 return 0; 2949 } 2950 2951 static __be32 2952 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2953 { 2954 int maxcount; 2955 char *page; 2956 __be32 *p; 2957 2958 if (nfserr) 2959 return nfserr; 2960 if (resp->xbuf->page_len) 2961 return nfserr_resource; 2962 2963 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2964 2965 maxcount = PAGE_SIZE; 2966 RESERVE_SPACE(4); 2967 2968 /* 2969 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2970 * if they would overflow the buffer. Is this kosher in NFSv4? If 2971 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2972 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2973 */ 2974 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2975 if (nfserr == nfserr_isdir) 2976 return nfserr_inval; 2977 if (nfserr) 2978 return nfserr; 2979 2980 WRITE32(maxcount); 2981 ADJUST_ARGS(); 2982 resp->xbuf->head[0].iov_len = (char*)p 2983 - (char*)resp->xbuf->head[0].iov_base; 2984 resp->xbuf->page_len = maxcount; 2985 2986 /* Use rest of head for padding and remaining ops: */ 2987 resp->xbuf->tail[0].iov_base = p; 2988 resp->xbuf->tail[0].iov_len = 0; 2989 if (maxcount&3) { 2990 RESERVE_SPACE(4); 2991 WRITE32(0); 2992 resp->xbuf->tail[0].iov_base += maxcount&3; 2993 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2994 ADJUST_ARGS(); 2995 } 2996 return 0; 2997 } 2998 2999 static __be32 3000 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3001 { 3002 int maxcount; 3003 loff_t offset; 3004 __be32 *page, *savep, *tailbase; 3005 __be32 *p; 3006 3007 if (nfserr) 3008 return nfserr; 3009 if (resp->xbuf->page_len) 3010 return nfserr_resource; 3011 3012 RESERVE_SPACE(8); /* verifier */ 3013 savep = p; 3014 3015 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3016 WRITE32(0); 3017 WRITE32(0); 3018 ADJUST_ARGS(); 3019 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 3020 tailbase = p; 3021 3022 maxcount = PAGE_SIZE; 3023 if (maxcount > readdir->rd_maxcount) 3024 maxcount = readdir->rd_maxcount; 3025 3026 /* 3027 * Convert from bytes to words, account for the two words already 3028 * written, make sure to leave two words at the end for the next 3029 * pointer and eof field. 3030 */ 3031 maxcount = (maxcount >> 2) - 4; 3032 if (maxcount < 0) { 3033 nfserr = nfserr_toosmall; 3034 goto err_no_verf; 3035 } 3036 3037 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 3038 readdir->common.err = 0; 3039 readdir->buflen = maxcount; 3040 readdir->buffer = page; 3041 readdir->offset = NULL; 3042 3043 offset = readdir->rd_cookie; 3044 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3045 &offset, 3046 &readdir->common, nfsd4_encode_dirent); 3047 if (nfserr == nfs_ok && 3048 readdir->common.err == nfserr_toosmall && 3049 readdir->buffer == page) 3050 nfserr = nfserr_toosmall; 3051 if (nfserr) 3052 goto err_no_verf; 3053 3054 if (readdir->offset) 3055 xdr_encode_hyper(readdir->offset, offset); 3056 3057 p = readdir->buffer; 3058 *p++ = 0; /* no more entries */ 3059 *p++ = htonl(readdir->common.err == nfserr_eof); 3060 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 3061 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 3062 3063 /* Use rest of head for padding and remaining ops: */ 3064 resp->xbuf->tail[0].iov_base = tailbase; 3065 resp->xbuf->tail[0].iov_len = 0; 3066 resp->p = resp->xbuf->tail[0].iov_base; 3067 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 3068 3069 return 0; 3070 err_no_verf: 3071 p = savep; 3072 ADJUST_ARGS(); 3073 return nfserr; 3074 } 3075 3076 static __be32 3077 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3078 { 3079 __be32 *p; 3080 3081 if (!nfserr) { 3082 RESERVE_SPACE(20); 3083 write_cinfo(&p, &remove->rm_cinfo); 3084 ADJUST_ARGS(); 3085 } 3086 return nfserr; 3087 } 3088 3089 static __be32 3090 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3091 { 3092 __be32 *p; 3093 3094 if (!nfserr) { 3095 RESERVE_SPACE(40); 3096 write_cinfo(&p, &rename->rn_sinfo); 3097 write_cinfo(&p, &rename->rn_tinfo); 3098 ADJUST_ARGS(); 3099 } 3100 return nfserr; 3101 } 3102 3103 static __be32 3104 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, 3105 __be32 nfserr,struct svc_export *exp) 3106 { 3107 int i = 0; 3108 u32 nflavs; 3109 struct exp_flavor_info *flavs; 3110 struct exp_flavor_info def_flavs[2]; 3111 __be32 *p; 3112 3113 if (nfserr) 3114 goto out; 3115 if (exp->ex_nflavors) { 3116 flavs = exp->ex_flavors; 3117 nflavs = exp->ex_nflavors; 3118 } else { /* Handling of some defaults in absence of real secinfo: */ 3119 flavs = def_flavs; 3120 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3121 nflavs = 2; 3122 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3123 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3124 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3125 nflavs = 1; 3126 flavs[0].pseudoflavor 3127 = svcauth_gss_flavor(exp->ex_client); 3128 } else { 3129 nflavs = 1; 3130 flavs[0].pseudoflavor 3131 = exp->ex_client->flavour->flavour; 3132 } 3133 } 3134 3135 RESERVE_SPACE(4); 3136 WRITE32(nflavs); 3137 ADJUST_ARGS(); 3138 for (i = 0; i < nflavs; i++) { 3139 u32 flav = flavs[i].pseudoflavor; 3140 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 3141 3142 if (gm) { 3143 RESERVE_SPACE(4); 3144 WRITE32(RPC_AUTH_GSS); 3145 ADJUST_ARGS(); 3146 RESERVE_SPACE(4 + gm->gm_oid.len); 3147 WRITE32(gm->gm_oid.len); 3148 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 3149 ADJUST_ARGS(); 3150 RESERVE_SPACE(4); 3151 WRITE32(0); /* qop */ 3152 ADJUST_ARGS(); 3153 RESERVE_SPACE(4); 3154 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 3155 ADJUST_ARGS(); 3156 gss_mech_put(gm); 3157 } else { 3158 RESERVE_SPACE(4); 3159 WRITE32(flav); 3160 ADJUST_ARGS(); 3161 } 3162 } 3163 out: 3164 if (exp) 3165 exp_put(exp); 3166 return nfserr; 3167 } 3168 3169 static __be32 3170 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3171 struct nfsd4_secinfo *secinfo) 3172 { 3173 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); 3174 } 3175 3176 static __be32 3177 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3178 struct nfsd4_secinfo_no_name *secinfo) 3179 { 3180 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); 3181 } 3182 3183 /* 3184 * The SETATTR encode routine is special -- it always encodes a bitmap, 3185 * regardless of the error status. 3186 */ 3187 static __be32 3188 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3189 { 3190 __be32 *p; 3191 3192 RESERVE_SPACE(12); 3193 if (nfserr) { 3194 WRITE32(2); 3195 WRITE32(0); 3196 WRITE32(0); 3197 } 3198 else { 3199 WRITE32(2); 3200 WRITE32(setattr->sa_bmval[0]); 3201 WRITE32(setattr->sa_bmval[1]); 3202 } 3203 ADJUST_ARGS(); 3204 return nfserr; 3205 } 3206 3207 static __be32 3208 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3209 { 3210 __be32 *p; 3211 3212 if (!nfserr) { 3213 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 3214 WRITEMEM(&scd->se_clientid, 8); 3215 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 3216 ADJUST_ARGS(); 3217 } 3218 else if (nfserr == nfserr_clid_inuse) { 3219 RESERVE_SPACE(8); 3220 WRITE32(0); 3221 WRITE32(0); 3222 ADJUST_ARGS(); 3223 } 3224 return nfserr; 3225 } 3226 3227 static __be32 3228 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3229 { 3230 __be32 *p; 3231 3232 if (!nfserr) { 3233 RESERVE_SPACE(16); 3234 WRITE32(write->wr_bytes_written); 3235 WRITE32(write->wr_how_written); 3236 WRITEMEM(write->wr_verifier.data, 8); 3237 ADJUST_ARGS(); 3238 } 3239 return nfserr; 3240 } 3241 3242 static __be32 3243 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 3244 struct nfsd4_exchange_id *exid) 3245 { 3246 __be32 *p; 3247 char *major_id; 3248 char *server_scope; 3249 int major_id_sz; 3250 int server_scope_sz; 3251 uint64_t minor_id = 0; 3252 3253 if (nfserr) 3254 return nfserr; 3255 3256 major_id = utsname()->nodename; 3257 major_id_sz = strlen(major_id); 3258 server_scope = utsname()->nodename; 3259 server_scope_sz = strlen(server_scope); 3260 3261 RESERVE_SPACE( 3262 8 /* eir_clientid */ + 3263 4 /* eir_sequenceid */ + 3264 4 /* eir_flags */ + 3265 4 /* spr_how (SP4_NONE) */ + 3266 8 /* so_minor_id */ + 3267 4 /* so_major_id.len */ + 3268 (XDR_QUADLEN(major_id_sz) * 4) + 3269 4 /* eir_server_scope.len */ + 3270 (XDR_QUADLEN(server_scope_sz) * 4) + 3271 4 /* eir_server_impl_id.count (0) */); 3272 3273 WRITEMEM(&exid->clientid, 8); 3274 WRITE32(exid->seqid); 3275 WRITE32(exid->flags); 3276 3277 /* state_protect4_r. Currently only support SP4_NONE */ 3278 BUG_ON(exid->spa_how != SP4_NONE); 3279 WRITE32(exid->spa_how); 3280 3281 /* The server_owner struct */ 3282 WRITE64(minor_id); /* Minor id */ 3283 /* major id */ 3284 WRITE32(major_id_sz); 3285 WRITEMEM(major_id, major_id_sz); 3286 3287 /* Server scope */ 3288 WRITE32(server_scope_sz); 3289 WRITEMEM(server_scope, server_scope_sz); 3290 3291 /* Implementation id */ 3292 WRITE32(0); /* zero length nfs_impl_id4 array */ 3293 ADJUST_ARGS(); 3294 return 0; 3295 } 3296 3297 static __be32 3298 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 3299 struct nfsd4_create_session *sess) 3300 { 3301 __be32 *p; 3302 3303 if (nfserr) 3304 return nfserr; 3305 3306 RESERVE_SPACE(24); 3307 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3308 WRITE32(sess->seqid); 3309 WRITE32(sess->flags); 3310 ADJUST_ARGS(); 3311 3312 RESERVE_SPACE(28); 3313 WRITE32(0); /* headerpadsz */ 3314 WRITE32(sess->fore_channel.maxreq_sz); 3315 WRITE32(sess->fore_channel.maxresp_sz); 3316 WRITE32(sess->fore_channel.maxresp_cached); 3317 WRITE32(sess->fore_channel.maxops); 3318 WRITE32(sess->fore_channel.maxreqs); 3319 WRITE32(sess->fore_channel.nr_rdma_attrs); 3320 ADJUST_ARGS(); 3321 3322 if (sess->fore_channel.nr_rdma_attrs) { 3323 RESERVE_SPACE(4); 3324 WRITE32(sess->fore_channel.rdma_attrs); 3325 ADJUST_ARGS(); 3326 } 3327 3328 RESERVE_SPACE(28); 3329 WRITE32(0); /* headerpadsz */ 3330 WRITE32(sess->back_channel.maxreq_sz); 3331 WRITE32(sess->back_channel.maxresp_sz); 3332 WRITE32(sess->back_channel.maxresp_cached); 3333 WRITE32(sess->back_channel.maxops); 3334 WRITE32(sess->back_channel.maxreqs); 3335 WRITE32(sess->back_channel.nr_rdma_attrs); 3336 ADJUST_ARGS(); 3337 3338 if (sess->back_channel.nr_rdma_attrs) { 3339 RESERVE_SPACE(4); 3340 WRITE32(sess->back_channel.rdma_attrs); 3341 ADJUST_ARGS(); 3342 } 3343 return 0; 3344 } 3345 3346 static __be32 3347 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3348 struct nfsd4_destroy_session *destroy_session) 3349 { 3350 return nfserr; 3351 } 3352 3353 static __be32 3354 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr, 3355 struct nfsd4_free_stateid *free_stateid) 3356 { 3357 __be32 *p; 3358 3359 if (nfserr) 3360 return nfserr; 3361 3362 RESERVE_SPACE(4); 3363 WRITE32(nfserr); 3364 ADJUST_ARGS(); 3365 return nfserr; 3366 } 3367 3368 static __be32 3369 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3370 struct nfsd4_sequence *seq) 3371 { 3372 __be32 *p; 3373 3374 if (nfserr) 3375 return nfserr; 3376 3377 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3378 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3379 WRITE32(seq->seqid); 3380 WRITE32(seq->slotid); 3381 /* Note slotid's are numbered from zero: */ 3382 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ 3383 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ 3384 WRITE32(seq->status_flags); 3385 3386 ADJUST_ARGS(); 3387 resp->cstate.datap = p; /* DRC cache data pointer */ 3388 return 0; 3389 } 3390 3391 __be32 3392 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr, 3393 struct nfsd4_test_stateid *test_stateid) 3394 { 3395 struct nfsd4_compoundargs *argp; 3396 struct nfs4_client *cl = resp->cstate.session->se_client; 3397 stateid_t si; 3398 __be32 *p; 3399 int i; 3400 int valid; 3401 3402 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp); 3403 argp = test_stateid->ts_saved_args; 3404 3405 RESERVE_SPACE(4); 3406 *p++ = htonl(test_stateid->ts_num_ids); 3407 resp->p = p; 3408 3409 nfs4_lock_state(); 3410 for (i = 0; i < test_stateid->ts_num_ids; i++) { 3411 nfsd4_decode_stateid(argp, &si); 3412 valid = nfs4_validate_stateid(cl, &si); 3413 RESERVE_SPACE(4); 3414 *p++ = htonl(valid); 3415 resp->p = p; 3416 } 3417 nfs4_unlock_state(); 3418 3419 return nfserr; 3420 } 3421 3422 static __be32 3423 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3424 { 3425 return nfserr; 3426 } 3427 3428 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3429 3430 /* 3431 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3432 * since we don't need to filter out obsolete ops as this is 3433 * done in the decoding phase. 3434 */ 3435 static nfsd4_enc nfsd4_enc_ops[] = { 3436 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3437 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3438 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3439 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3440 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3441 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3442 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3443 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3444 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3445 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3446 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3447 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3448 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3449 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3450 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3451 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3452 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3453 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3454 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3455 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3456 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3457 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3458 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3459 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3460 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3461 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3462 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3463 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3464 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3465 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3466 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3467 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3468 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3469 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3470 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3471 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3472 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3473 3474 /* NFSv4.1 operations */ 3475 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3476 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 3477 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3478 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3479 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3480 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, 3481 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3482 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3483 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3484 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3485 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3486 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3487 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 3488 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3489 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3490 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 3491 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3492 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3493 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3494 }; 3495 3496 /* 3497 * Calculate the total amount of memory that the compound response has taken 3498 * after encoding the current operation with pad. 3499 * 3500 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() 3501 * which was specified at nfsd4_operation, else pad is zero. 3502 * 3503 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. 3504 * 3505 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3506 * will be at least a page and will therefore hold the xdr_buf head. 3507 */ 3508 int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) 3509 { 3510 struct xdr_buf *xb = &resp->rqstp->rq_res; 3511 struct nfsd4_session *session = NULL; 3512 struct nfsd4_slot *slot = resp->cstate.slot; 3513 u32 length, tlen = 0; 3514 3515 if (!nfsd4_has_session(&resp->cstate)) 3516 return 0; 3517 3518 session = resp->cstate.session; 3519 if (session == NULL) 3520 return 0; 3521 3522 if (xb->page_len == 0) { 3523 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3524 } else { 3525 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3526 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3527 3528 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3529 } 3530 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3531 length, xb->page_len, tlen, pad); 3532 3533 if (length > session->se_fchannel.maxresp_sz) 3534 return nfserr_rep_too_big; 3535 3536 if (slot->sl_cachethis == 1 && 3537 length > session->se_fchannel.maxresp_cached) 3538 return nfserr_rep_too_big_to_cache; 3539 3540 return 0; 3541 } 3542 3543 void 3544 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3545 { 3546 __be32 *statp; 3547 __be32 *p; 3548 3549 RESERVE_SPACE(8); 3550 WRITE32(op->opnum); 3551 statp = p++; /* to be backfilled at the end */ 3552 ADJUST_ARGS(); 3553 3554 if (op->opnum == OP_ILLEGAL) 3555 goto status; 3556 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3557 !nfsd4_enc_ops[op->opnum]); 3558 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3559 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3560 if (!op->status) 3561 op->status = nfsd4_check_resp_size(resp, 0); 3562 status: 3563 /* 3564 * Note: We write the status directly, instead of using WRITE32(), 3565 * since it is already in network byte order. 3566 */ 3567 *statp = op->status; 3568 } 3569 3570 /* 3571 * Encode the reply stored in the stateowner reply cache 3572 * 3573 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3574 * previously sent already encoded operation. 3575 * 3576 * called with nfs4_lock_state() held 3577 */ 3578 void 3579 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3580 { 3581 __be32 *p; 3582 struct nfs4_replay *rp = op->replay; 3583 3584 BUG_ON(!rp); 3585 3586 RESERVE_SPACE(8); 3587 WRITE32(op->opnum); 3588 *p++ = rp->rp_status; /* already xdr'ed */ 3589 ADJUST_ARGS(); 3590 3591 RESERVE_SPACE(rp->rp_buflen); 3592 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3593 ADJUST_ARGS(); 3594 } 3595 3596 int 3597 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3598 { 3599 return xdr_ressize_check(rqstp, p); 3600 } 3601 3602 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 3603 { 3604 struct svc_rqst *rqstp = rq; 3605 struct nfsd4_compoundargs *args = rqstp->rq_argp; 3606 3607 if (args->ops != args->iops) { 3608 kfree(args->ops); 3609 args->ops = args->iops; 3610 } 3611 kfree(args->tmpp); 3612 args->tmpp = NULL; 3613 while (args->to_free) { 3614 struct tmpbuf *tb = args->to_free; 3615 args->to_free = tb->next; 3616 tb->release(tb->buf); 3617 kfree(tb); 3618 } 3619 return 1; 3620 } 3621 3622 int 3623 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3624 { 3625 args->p = p; 3626 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3627 args->pagelist = rqstp->rq_arg.pages; 3628 args->pagelen = rqstp->rq_arg.page_len; 3629 args->tmpp = NULL; 3630 args->to_free = NULL; 3631 args->ops = args->iops; 3632 args->rqstp = rqstp; 3633 3634 return !nfsd4_decode_compound(args); 3635 } 3636 3637 int 3638 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3639 { 3640 /* 3641 * All that remains is to write the tag and operation count... 3642 */ 3643 struct nfsd4_compound_state *cs = &resp->cstate; 3644 struct kvec *iov; 3645 p = resp->tagp; 3646 *p++ = htonl(resp->taglen); 3647 memcpy(p, resp->tag, resp->taglen); 3648 p += XDR_QUADLEN(resp->taglen); 3649 *p++ = htonl(resp->opcnt); 3650 3651 if (rqstp->rq_res.page_len) 3652 iov = &rqstp->rq_res.tail[0]; 3653 else 3654 iov = &rqstp->rq_res.head[0]; 3655 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3656 BUG_ON(iov->iov_len > PAGE_SIZE); 3657 if (nfsd4_has_session(cs)) { 3658 if (cs->status != nfserr_replay_cache) { 3659 nfsd4_store_cache_entry(resp); 3660 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3661 cs->slot->sl_inuse = false; 3662 } 3663 /* Renew the clientid on success and on replay */ 3664 release_session_client(cs->session); 3665 nfsd4_put_session(cs->session); 3666 } 3667 return 1; 3668 } 3669 3670 /* 3671 * Local variables: 3672 * c-basic-offset: 8 3673 * End: 3674 */ 3675