1 /* 2 * fs/nfs/nfs4xdr.c 3 * 4 * Server-side XDR for NFSv4 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * TODO: Neil Brown made the following observation: We currently 38 * initially reserve NFSD_BUFSIZE space on the transmit queue and 39 * never release any of that until the request is complete. 40 * It would be good to calculate a new maximum response size while 41 * decoding the COMPOUND, and call svc_reserve with this number 42 * at the end of nfs4svc_decode_compoundargs. 43 */ 44 45 #include <linux/param.h> 46 #include <linux/smp.h> 47 #include <linux/fs.h> 48 #include <linux/namei.h> 49 #include <linux/vfs.h> 50 #include <linux/sunrpc/xdr.h> 51 #include <linux/sunrpc/svc.h> 52 #include <linux/sunrpc/clnt.h> 53 #include <linux/nfsd/nfsd.h> 54 #include <linux/nfsd/state.h> 55 #include <linux/nfsd/xdr4.h> 56 #include <linux/nfsd_idmap.h> 57 #include <linux/nfs4.h> 58 #include <linux/nfs4_acl.h> 59 #include <linux/sunrpc/gss_api.h> 60 #include <linux/sunrpc/svcauth_gss.h> 61 62 #define NFSDDBG_FACILITY NFSDDBG_XDR 63 64 /* 65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 66 * directory in order to indicate to the client that a filesystem boundary is present 67 * We use a fixed fsid for a referral 68 */ 69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 71 72 static __be32 73 check_filename(char *str, int len, __be32 err) 74 { 75 int i; 76 77 if (len == 0) 78 return nfserr_inval; 79 if (isdotent(str, len)) 80 return err; 81 for (i = 0; i < len; i++) 82 if (str[i] == '/') 83 return err; 84 return 0; 85 } 86 87 /* 88 * START OF "GENERIC" DECODE ROUTINES. 89 * These may look a little ugly since they are imported from a "generic" 90 * set of XDR encode/decode routines which are intended to be shared by 91 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 92 * 93 * If the pain of reading these is too great, it should be a straightforward 94 * task to translate them into Linux-specific versions which are more 95 * consistent with the style used in NFSv2/v3... 96 */ 97 #define DECODE_HEAD \ 98 __be32 *p; \ 99 __be32 status 100 #define DECODE_TAIL \ 101 status = 0; \ 102 out: \ 103 return status; \ 104 xdr_error: \ 105 dprintk("NFSD: xdr error (%s:%d)\n", \ 106 __FILE__, __LINE__); \ 107 status = nfserr_bad_xdr; \ 108 goto out 109 110 #define READ32(x) (x) = ntohl(*p++) 111 #define READ64(x) do { \ 112 (x) = (u64)ntohl(*p++) << 32; \ 113 (x) |= ntohl(*p++); \ 114 } while (0) 115 #define READTIME(x) do { \ 116 p++; \ 117 (x) = ntohl(*p++); \ 118 p++; \ 119 } while (0) 120 #define READMEM(x,nbytes) do { \ 121 x = (char *)p; \ 122 p += XDR_QUADLEN(nbytes); \ 123 } while (0) 124 #define SAVEMEM(x,nbytes) do { \ 125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 126 savemem(argp, p, nbytes) : \ 127 (char *)p)) { \ 128 dprintk("NFSD: xdr error (%s:%d)\n", \ 129 __FILE__, __LINE__); \ 130 goto xdr_error; \ 131 } \ 132 p += XDR_QUADLEN(nbytes); \ 133 } while (0) 134 #define COPYMEM(x,nbytes) do { \ 135 memcpy((x), p, nbytes); \ 136 p += XDR_QUADLEN(nbytes); \ 137 } while (0) 138 139 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 140 #define READ_BUF(nbytes) do { \ 141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 142 p = argp->p; \ 143 argp->p += XDR_QUADLEN(nbytes); \ 144 } else if (!(p = read_buf(argp, nbytes))) { \ 145 dprintk("NFSD: xdr error (%s:%d)\n", \ 146 __FILE__, __LINE__); \ 147 goto xdr_error; \ 148 } \ 149 } while (0) 150 151 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 152 { 153 /* We want more bytes than seem to be available. 154 * Maybe we need a new page, maybe we have just run out 155 */ 156 unsigned int avail = (char *)argp->end - (char *)argp->p; 157 __be32 *p; 158 if (avail + argp->pagelen < nbytes) 159 return NULL; 160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 161 return NULL; 162 /* ok, we can do it with the current plus the next page */ 163 if (nbytes <= sizeof(argp->tmp)) 164 p = argp->tmp; 165 else { 166 kfree(argp->tmpp); 167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 168 if (!p) 169 return NULL; 170 171 } 172 /* 173 * The following memcpy is safe because read_buf is always 174 * called with nbytes > avail, and the two cases above both 175 * guarantee p points to at least nbytes bytes. 176 */ 177 memcpy(p, argp->p, avail); 178 /* step to next page */ 179 argp->p = page_address(argp->pagelist[0]); 180 argp->pagelist++; 181 if (argp->pagelen < PAGE_SIZE) { 182 argp->end = p + (argp->pagelen>>2); 183 argp->pagelen = 0; 184 } else { 185 argp->end = p + (PAGE_SIZE>>2); 186 argp->pagelen -= PAGE_SIZE; 187 } 188 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 189 argp->p += XDR_QUADLEN(nbytes - avail); 190 return p; 191 } 192 193 static int 194 defer_free(struct nfsd4_compoundargs *argp, 195 void (*release)(const void *), void *p) 196 { 197 struct tmpbuf *tb; 198 199 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 200 if (!tb) 201 return -ENOMEM; 202 tb->buf = p; 203 tb->release = release; 204 tb->next = argp->to_free; 205 argp->to_free = tb; 206 return 0; 207 } 208 209 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 210 { 211 if (p == argp->tmp) { 212 p = kmalloc(nbytes, GFP_KERNEL); 213 if (!p) 214 return NULL; 215 memcpy(p, argp->tmp, nbytes); 216 } else { 217 BUG_ON(p != argp->tmpp); 218 argp->tmpp = NULL; 219 } 220 if (defer_free(argp, kfree, p)) { 221 kfree(p); 222 return NULL; 223 } else 224 return (char *)p; 225 } 226 227 static __be32 228 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 229 { 230 u32 bmlen; 231 DECODE_HEAD; 232 233 bmval[0] = 0; 234 bmval[1] = 0; 235 236 READ_BUF(4); 237 READ32(bmlen); 238 if (bmlen > 1000) 239 goto xdr_error; 240 241 READ_BUF(bmlen << 2); 242 if (bmlen > 0) 243 READ32(bmval[0]); 244 if (bmlen > 1) 245 READ32(bmval[1]); 246 247 DECODE_TAIL; 248 } 249 250 static __be32 251 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 252 struct nfs4_acl **acl) 253 { 254 int expected_len, len = 0; 255 u32 dummy32; 256 char *buf; 257 int host_err; 258 259 DECODE_HEAD; 260 iattr->ia_valid = 0; 261 if ((status = nfsd4_decode_bitmap(argp, bmval))) 262 return status; 263 264 /* 265 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP; 266 * read-only attributes return ERR_INVAL. 267 */ 268 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 269 return nfserr_attrnotsupp; 270 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 271 return nfserr_inval; 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 host_err = 0; 311 if (ace->whotype != NFS4_ACL_WHO_NAMED) 312 ace->who = 0; 313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 314 host_err = nfsd_map_name_to_gid(argp->rqstp, 315 buf, dummy32, &ace->who); 316 else 317 host_err = nfsd_map_name_to_uid(argp->rqstp, 318 buf, dummy32, &ace->who); 319 if (host_err) 320 goto out_nfserr; 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 ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 339 goto out_nfserr; 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 ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 350 goto out_nfserr; 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 (len != expected_len) 406 goto xdr_error; 407 408 DECODE_TAIL; 409 410 out_nfserr: 411 status = nfserrno(host_err); 412 goto out; 413 } 414 415 static __be32 416 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 417 { 418 DECODE_HEAD; 419 420 READ_BUF(sizeof(stateid_t)); 421 READ32(sid->si_generation); 422 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 423 424 DECODE_TAIL; 425 } 426 427 static __be32 428 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 429 { 430 DECODE_HEAD; 431 432 READ_BUF(4); 433 READ32(access->ac_req_access); 434 435 DECODE_TAIL; 436 } 437 438 static __be32 439 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 440 { 441 DECODE_HEAD; 442 443 close->cl_stateowner = NULL; 444 READ_BUF(4); 445 READ32(close->cl_seqid); 446 return nfsd4_decode_stateid(argp, &close->cl_stateid); 447 448 DECODE_TAIL; 449 } 450 451 452 static __be32 453 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 454 { 455 DECODE_HEAD; 456 457 READ_BUF(12); 458 READ64(commit->co_offset); 459 READ32(commit->co_count); 460 461 DECODE_TAIL; 462 } 463 464 static __be32 465 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 466 { 467 DECODE_HEAD; 468 469 READ_BUF(4); 470 READ32(create->cr_type); 471 switch (create->cr_type) { 472 case NF4LNK: 473 READ_BUF(4); 474 READ32(create->cr_linklen); 475 READ_BUF(create->cr_linklen); 476 SAVEMEM(create->cr_linkname, create->cr_linklen); 477 break; 478 case NF4BLK: 479 case NF4CHR: 480 READ_BUF(8); 481 READ32(create->cr_specdata1); 482 READ32(create->cr_specdata2); 483 break; 484 case NF4SOCK: 485 case NF4FIFO: 486 case NF4DIR: 487 default: 488 break; 489 } 490 491 READ_BUF(4); 492 READ32(create->cr_namelen); 493 READ_BUF(create->cr_namelen); 494 SAVEMEM(create->cr_name, create->cr_namelen); 495 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 496 return status; 497 498 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 499 goto out; 500 501 DECODE_TAIL; 502 } 503 504 static inline __be32 505 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 506 { 507 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 508 } 509 510 static inline __be32 511 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 512 { 513 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 514 } 515 516 static __be32 517 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 518 { 519 DECODE_HEAD; 520 521 READ_BUF(4); 522 READ32(link->li_namelen); 523 READ_BUF(link->li_namelen); 524 SAVEMEM(link->li_name, link->li_namelen); 525 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 526 return status; 527 528 DECODE_TAIL; 529 } 530 531 static __be32 532 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 533 { 534 DECODE_HEAD; 535 536 lock->lk_replay_owner = NULL; 537 /* 538 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 539 */ 540 READ_BUF(28); 541 READ32(lock->lk_type); 542 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 543 goto xdr_error; 544 READ32(lock->lk_reclaim); 545 READ64(lock->lk_offset); 546 READ64(lock->lk_length); 547 READ32(lock->lk_is_new); 548 549 if (lock->lk_is_new) { 550 READ_BUF(4); 551 READ32(lock->lk_new_open_seqid); 552 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 553 if (status) 554 return status; 555 READ_BUF(8 + sizeof(clientid_t)); 556 READ32(lock->lk_new_lock_seqid); 557 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 558 READ32(lock->lk_new_owner.len); 559 READ_BUF(lock->lk_new_owner.len); 560 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 561 } else { 562 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 563 if (status) 564 return status; 565 READ_BUF(4); 566 READ32(lock->lk_old_lock_seqid); 567 } 568 569 DECODE_TAIL; 570 } 571 572 static __be32 573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 574 { 575 DECODE_HEAD; 576 577 READ_BUF(32); 578 READ32(lockt->lt_type); 579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 580 goto xdr_error; 581 READ64(lockt->lt_offset); 582 READ64(lockt->lt_length); 583 COPYMEM(&lockt->lt_clientid, 8); 584 READ32(lockt->lt_owner.len); 585 READ_BUF(lockt->lt_owner.len); 586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 587 588 DECODE_TAIL; 589 } 590 591 static __be32 592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 593 { 594 DECODE_HEAD; 595 596 locku->lu_stateowner = NULL; 597 READ_BUF(8); 598 READ32(locku->lu_type); 599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 600 goto xdr_error; 601 READ32(locku->lu_seqid); 602 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 603 if (status) 604 return status; 605 READ_BUF(16); 606 READ64(locku->lu_offset); 607 READ64(locku->lu_length); 608 609 DECODE_TAIL; 610 } 611 612 static __be32 613 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 614 { 615 DECODE_HEAD; 616 617 READ_BUF(4); 618 READ32(lookup->lo_len); 619 READ_BUF(lookup->lo_len); 620 SAVEMEM(lookup->lo_name, lookup->lo_len); 621 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 622 return status; 623 624 DECODE_TAIL; 625 } 626 627 static __be32 628 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 629 { 630 DECODE_HEAD; 631 632 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 633 open->op_iattr.ia_valid = 0; 634 open->op_stateowner = NULL; 635 636 /* seqid, share_access, share_deny, clientid, ownerlen */ 637 READ_BUF(16 + sizeof(clientid_t)); 638 READ32(open->op_seqid); 639 READ32(open->op_share_access); 640 READ32(open->op_share_deny); 641 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 642 READ32(open->op_owner.len); 643 644 /* owner, open_flag */ 645 READ_BUF(open->op_owner.len + 4); 646 SAVEMEM(open->op_owner.data, open->op_owner.len); 647 READ32(open->op_create); 648 switch (open->op_create) { 649 case NFS4_OPEN_NOCREATE: 650 break; 651 case NFS4_OPEN_CREATE: 652 READ_BUF(4); 653 READ32(open->op_createmode); 654 switch (open->op_createmode) { 655 case NFS4_CREATE_UNCHECKED: 656 case NFS4_CREATE_GUARDED: 657 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 658 goto out; 659 break; 660 case NFS4_CREATE_EXCLUSIVE: 661 READ_BUF(8); 662 COPYMEM(open->op_verf.data, 8); 663 break; 664 default: 665 goto xdr_error; 666 } 667 break; 668 default: 669 goto xdr_error; 670 } 671 672 /* open_claim */ 673 READ_BUF(4); 674 READ32(open->op_claim_type); 675 switch (open->op_claim_type) { 676 case NFS4_OPEN_CLAIM_NULL: 677 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 678 READ_BUF(4); 679 READ32(open->op_fname.len); 680 READ_BUF(open->op_fname.len); 681 SAVEMEM(open->op_fname.data, open->op_fname.len); 682 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 683 return status; 684 break; 685 case NFS4_OPEN_CLAIM_PREVIOUS: 686 READ_BUF(4); 687 READ32(open->op_delegate_type); 688 break; 689 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 690 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 691 if (status) 692 return status; 693 READ_BUF(4); 694 READ32(open->op_fname.len); 695 READ_BUF(open->op_fname.len); 696 SAVEMEM(open->op_fname.data, open->op_fname.len); 697 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 698 return status; 699 break; 700 default: 701 goto xdr_error; 702 } 703 704 DECODE_TAIL; 705 } 706 707 static __be32 708 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 709 { 710 DECODE_HEAD; 711 712 open_conf->oc_stateowner = NULL; 713 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 714 if (status) 715 return status; 716 READ_BUF(4); 717 READ32(open_conf->oc_seqid); 718 719 DECODE_TAIL; 720 } 721 722 static __be32 723 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 724 { 725 DECODE_HEAD; 726 727 open_down->od_stateowner = NULL; 728 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 729 if (status) 730 return status; 731 READ_BUF(12); 732 READ32(open_down->od_seqid); 733 READ32(open_down->od_share_access); 734 READ32(open_down->od_share_deny); 735 736 DECODE_TAIL; 737 } 738 739 static __be32 740 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 741 { 742 DECODE_HEAD; 743 744 READ_BUF(4); 745 READ32(putfh->pf_fhlen); 746 if (putfh->pf_fhlen > NFS4_FHSIZE) 747 goto xdr_error; 748 READ_BUF(putfh->pf_fhlen); 749 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 750 751 DECODE_TAIL; 752 } 753 754 static __be32 755 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 756 { 757 DECODE_HEAD; 758 759 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 760 if (status) 761 return status; 762 READ_BUF(12); 763 READ64(read->rd_offset); 764 READ32(read->rd_length); 765 766 DECODE_TAIL; 767 } 768 769 static __be32 770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 771 { 772 DECODE_HEAD; 773 774 READ_BUF(24); 775 READ64(readdir->rd_cookie); 776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 778 READ32(readdir->rd_maxcount); 779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 780 goto out; 781 782 DECODE_TAIL; 783 } 784 785 static __be32 786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 787 { 788 DECODE_HEAD; 789 790 READ_BUF(4); 791 READ32(remove->rm_namelen); 792 READ_BUF(remove->rm_namelen); 793 SAVEMEM(remove->rm_name, remove->rm_namelen); 794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 795 return status; 796 797 DECODE_TAIL; 798 } 799 800 static __be32 801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 802 { 803 DECODE_HEAD; 804 805 READ_BUF(4); 806 READ32(rename->rn_snamelen); 807 READ_BUF(rename->rn_snamelen + 4); 808 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 809 READ32(rename->rn_tnamelen); 810 READ_BUF(rename->rn_tnamelen); 811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 813 return status; 814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 815 return status; 816 817 DECODE_TAIL; 818 } 819 820 static __be32 821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 822 { 823 DECODE_HEAD; 824 825 READ_BUF(sizeof(clientid_t)); 826 COPYMEM(clientid, sizeof(clientid_t)); 827 828 DECODE_TAIL; 829 } 830 831 static __be32 832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 833 struct nfsd4_secinfo *secinfo) 834 { 835 DECODE_HEAD; 836 837 READ_BUF(4); 838 READ32(secinfo->si_namelen); 839 READ_BUF(secinfo->si_namelen); 840 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 841 status = check_filename(secinfo->si_name, secinfo->si_namelen, 842 nfserr_noent); 843 if (status) 844 return status; 845 DECODE_TAIL; 846 } 847 848 static __be32 849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 850 { 851 __be32 status; 852 853 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 854 if (status) 855 return status; 856 return nfsd4_decode_fattr(argp, setattr->sa_bmval, 857 &setattr->sa_iattr, &setattr->sa_acl); 858 } 859 860 static __be32 861 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 862 { 863 DECODE_HEAD; 864 865 READ_BUF(12); 866 COPYMEM(setclientid->se_verf.data, 8); 867 READ32(setclientid->se_namelen); 868 869 READ_BUF(setclientid->se_namelen + 8); 870 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 871 READ32(setclientid->se_callback_prog); 872 READ32(setclientid->se_callback_netid_len); 873 874 READ_BUF(setclientid->se_callback_netid_len + 4); 875 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 876 READ32(setclientid->se_callback_addr_len); 877 878 READ_BUF(setclientid->se_callback_addr_len + 4); 879 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 880 READ32(setclientid->se_callback_ident); 881 882 DECODE_TAIL; 883 } 884 885 static __be32 886 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 887 { 888 DECODE_HEAD; 889 890 READ_BUF(8 + sizeof(nfs4_verifier)); 891 COPYMEM(&scd_c->sc_clientid, 8); 892 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 893 894 DECODE_TAIL; 895 } 896 897 /* Also used for NVERIFY */ 898 static __be32 899 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 900 { 901 #if 0 902 struct nfsd4_compoundargs save = { 903 .p = argp->p, 904 .end = argp->end, 905 .rqstp = argp->rqstp, 906 }; 907 u32 ve_bmval[2]; 908 struct iattr ve_iattr; /* request */ 909 struct nfs4_acl *ve_acl; /* request */ 910 #endif 911 DECODE_HEAD; 912 913 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 914 goto out; 915 916 /* For convenience's sake, we compare raw xdr'd attributes in 917 * nfsd4_proc_verify; however we still decode here just to return 918 * correct error in case of bad xdr. */ 919 #if 0 920 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 921 if (status == nfserr_inval) { 922 status = nfserrno(status); 923 goto out; 924 } 925 #endif 926 READ_BUF(4); 927 READ32(verify->ve_attrlen); 928 READ_BUF(verify->ve_attrlen); 929 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 930 931 DECODE_TAIL; 932 } 933 934 static __be32 935 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 936 { 937 int avail; 938 int v; 939 int len; 940 DECODE_HEAD; 941 942 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 943 if (status) 944 return status; 945 READ_BUF(16); 946 READ64(write->wr_offset); 947 READ32(write->wr_stable_how); 948 if (write->wr_stable_how > 2) 949 goto xdr_error; 950 READ32(write->wr_buflen); 951 952 /* Sorry .. no magic macros for this.. * 953 * READ_BUF(write->wr_buflen); 954 * SAVEMEM(write->wr_buf, write->wr_buflen); 955 */ 956 avail = (char*)argp->end - (char*)argp->p; 957 if (avail + argp->pagelen < write->wr_buflen) { 958 dprintk("NFSD: xdr error (%s:%d)\n", 959 __FILE__, __LINE__); 960 goto xdr_error; 961 } 962 argp->rqstp->rq_vec[0].iov_base = p; 963 argp->rqstp->rq_vec[0].iov_len = avail; 964 v = 0; 965 len = write->wr_buflen; 966 while (len > argp->rqstp->rq_vec[v].iov_len) { 967 len -= argp->rqstp->rq_vec[v].iov_len; 968 v++; 969 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 970 argp->pagelist++; 971 if (argp->pagelen >= PAGE_SIZE) { 972 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 973 argp->pagelen -= PAGE_SIZE; 974 } else { 975 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 976 argp->pagelen -= len; 977 } 978 } 979 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 980 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 981 argp->rqstp->rq_vec[v].iov_len = len; 982 write->wr_vlen = v+1; 983 984 DECODE_TAIL; 985 } 986 987 static __be32 988 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 989 { 990 DECODE_HEAD; 991 992 READ_BUF(12); 993 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 994 READ32(rlockowner->rl_owner.len); 995 READ_BUF(rlockowner->rl_owner.len); 996 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 997 998 DECODE_TAIL; 999 } 1000 1001 static __be32 1002 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1003 { 1004 return nfs_ok; 1005 } 1006 1007 static __be32 1008 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1009 { 1010 return nfserr_opnotsupp; 1011 } 1012 1013 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1014 1015 static nfsd4_dec nfsd4_dec_ops[] = { 1016 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1017 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1018 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1019 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1020 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1021 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1022 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1023 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1024 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1025 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1026 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1027 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1028 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1029 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1030 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1031 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1032 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1033 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1034 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1035 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1036 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1037 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1038 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1039 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1040 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1041 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1042 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1043 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1044 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1045 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1046 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1047 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1048 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1049 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1050 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1051 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1052 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1053 }; 1054 1055 struct nfsd4_minorversion_ops { 1056 nfsd4_dec *decoders; 1057 int nops; 1058 }; 1059 1060 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1061 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1062 }; 1063 1064 static __be32 1065 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1066 { 1067 DECODE_HEAD; 1068 struct nfsd4_op *op; 1069 struct nfsd4_minorversion_ops *ops; 1070 int i; 1071 1072 /* 1073 * XXX: According to spec, we should check the tag 1074 * for UTF-8 compliance. I'm postponing this for 1075 * now because it seems that some clients do use 1076 * binary tags. 1077 */ 1078 READ_BUF(4); 1079 READ32(argp->taglen); 1080 READ_BUF(argp->taglen + 8); 1081 SAVEMEM(argp->tag, argp->taglen); 1082 READ32(argp->minorversion); 1083 READ32(argp->opcnt); 1084 1085 if (argp->taglen > NFSD4_MAX_TAGLEN) 1086 goto xdr_error; 1087 if (argp->opcnt > 100) 1088 goto xdr_error; 1089 1090 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1091 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1092 if (!argp->ops) { 1093 argp->ops = argp->iops; 1094 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1095 goto xdr_error; 1096 } 1097 } 1098 1099 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1100 argp->opcnt = 0; 1101 1102 ops = &nfsd4_minorversion[argp->minorversion]; 1103 for (i = 0; i < argp->opcnt; i++) { 1104 op = &argp->ops[i]; 1105 op->replay = NULL; 1106 1107 /* 1108 * We can't use READ_BUF() here because we need to handle 1109 * a missing opcode as an OP_WRITE + 1. So we need to check 1110 * to see if we're truly at the end of our buffer or if there 1111 * is another page we need to flip to. 1112 */ 1113 1114 if (argp->p == argp->end) { 1115 if (argp->pagelen < 4) { 1116 /* There isn't an opcode still on the wire */ 1117 op->opnum = OP_WRITE + 1; 1118 op->status = nfserr_bad_xdr; 1119 argp->opcnt = i+1; 1120 break; 1121 } 1122 1123 /* 1124 * False alarm. We just hit a page boundary, but there 1125 * is still data available. Move pointer across page 1126 * boundary. *snip from READ_BUF* 1127 */ 1128 argp->p = page_address(argp->pagelist[0]); 1129 argp->pagelist++; 1130 if (argp->pagelen < PAGE_SIZE) { 1131 argp->end = p + (argp->pagelen>>2); 1132 argp->pagelen = 0; 1133 } else { 1134 argp->end = p + (PAGE_SIZE>>2); 1135 argp->pagelen -= PAGE_SIZE; 1136 } 1137 } 1138 op->opnum = ntohl(*argp->p++); 1139 1140 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops) 1141 op->status = ops->decoders[op->opnum](argp, &op->u); 1142 else { 1143 op->opnum = OP_ILLEGAL; 1144 op->status = nfserr_op_illegal; 1145 } 1146 1147 if (op->status) { 1148 argp->opcnt = i+1; 1149 break; 1150 } 1151 } 1152 1153 DECODE_TAIL; 1154 } 1155 /* 1156 * END OF "GENERIC" DECODE ROUTINES. 1157 */ 1158 1159 /* 1160 * START OF "GENERIC" ENCODE ROUTINES. 1161 * These may look a little ugly since they are imported from a "generic" 1162 * set of XDR encode/decode routines which are intended to be shared by 1163 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1164 * 1165 * If the pain of reading these is too great, it should be a straightforward 1166 * task to translate them into Linux-specific versions which are more 1167 * consistent with the style used in NFSv2/v3... 1168 */ 1169 #define ENCODE_HEAD __be32 *p 1170 1171 #define WRITE32(n) *p++ = htonl(n) 1172 #define WRITE64(n) do { \ 1173 *p++ = htonl((u32)((n) >> 32)); \ 1174 *p++ = htonl((u32)(n)); \ 1175 } while (0) 1176 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1177 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1178 memcpy(p, ptr, nbytes); \ 1179 p += XDR_QUADLEN(nbytes); \ 1180 }} while (0) 1181 #define WRITECINFO(c) do { \ 1182 *p++ = htonl(c.atomic); \ 1183 *p++ = htonl(c.before_ctime_sec); \ 1184 *p++ = htonl(c.before_ctime_nsec); \ 1185 *p++ = htonl(c.after_ctime_sec); \ 1186 *p++ = htonl(c.after_ctime_nsec); \ 1187 } while (0) 1188 1189 #define RESERVE_SPACE(nbytes) do { \ 1190 p = resp->p; \ 1191 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1192 } while (0) 1193 #define ADJUST_ARGS() resp->p = p 1194 1195 /* 1196 * Header routine to setup seqid operation replay cache 1197 */ 1198 #define ENCODE_SEQID_OP_HEAD \ 1199 __be32 *save; \ 1200 \ 1201 save = resp->p; 1202 1203 /* 1204 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1205 * is where sequence id's are incremented, and the replay cache is filled. 1206 * Note that we increment sequence id's here, at the last moment, so we're sure 1207 * we know whether the error to be returned is a sequence id mutating error. 1208 */ 1209 1210 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1211 if (seqid_mutating_err(nfserr) && stateowner) { \ 1212 stateowner->so_seqid++; \ 1213 stateowner->so_replay.rp_status = nfserr; \ 1214 stateowner->so_replay.rp_buflen = \ 1215 (((char *)(resp)->p - (char *)save)); \ 1216 memcpy(stateowner->so_replay.rp_buf, save, \ 1217 stateowner->so_replay.rp_buflen); \ 1218 } } while (0); 1219 1220 /* Encode as an array of strings the string given with components 1221 * seperated @sep. 1222 */ 1223 static __be32 nfsd4_encode_components(char sep, char *components, 1224 __be32 **pp, int *buflen) 1225 { 1226 __be32 *p = *pp; 1227 __be32 *countp = p; 1228 int strlen, count=0; 1229 char *str, *end; 1230 1231 dprintk("nfsd4_encode_components(%s)\n", components); 1232 if ((*buflen -= 4) < 0) 1233 return nfserr_resource; 1234 WRITE32(0); /* We will fill this in with @count later */ 1235 end = str = components; 1236 while (*end) { 1237 for (; *end && (*end != sep); end++) 1238 ; /* Point to end of component */ 1239 strlen = end - str; 1240 if (strlen) { 1241 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1242 return nfserr_resource; 1243 WRITE32(strlen); 1244 WRITEMEM(str, strlen); 1245 count++; 1246 } 1247 else 1248 end++; 1249 str = end; 1250 } 1251 *pp = p; 1252 p = countp; 1253 WRITE32(count); 1254 return 0; 1255 } 1256 1257 /* 1258 * encode a location element of a fs_locations structure 1259 */ 1260 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1261 __be32 **pp, int *buflen) 1262 { 1263 __be32 status; 1264 __be32 *p = *pp; 1265 1266 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1267 if (status) 1268 return status; 1269 status = nfsd4_encode_components('/', location->path, &p, buflen); 1270 if (status) 1271 return status; 1272 *pp = p; 1273 return 0; 1274 } 1275 1276 /* 1277 * Return the path to an export point in the pseudo filesystem namespace 1278 * Returned string is safe to use as long as the caller holds a reference 1279 * to @exp. 1280 */ 1281 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1282 { 1283 struct svc_fh tmp_fh; 1284 char *path, *rootpath; 1285 1286 fh_init(&tmp_fh, NFS4_FHSIZE); 1287 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1288 if (*stat) 1289 return NULL; 1290 rootpath = tmp_fh.fh_export->ex_pathname; 1291 1292 path = exp->ex_pathname; 1293 1294 if (strncmp(path, rootpath, strlen(rootpath))) { 1295 dprintk("nfsd: fs_locations failed;" 1296 "%s is not contained in %s\n", path, rootpath); 1297 *stat = nfserr_notsupp; 1298 return NULL; 1299 } 1300 1301 return path + strlen(rootpath); 1302 } 1303 1304 /* 1305 * encode a fs_locations structure 1306 */ 1307 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1308 struct svc_export *exp, 1309 __be32 **pp, int *buflen) 1310 { 1311 __be32 status; 1312 int i; 1313 __be32 *p = *pp; 1314 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1315 char *root = nfsd4_path(rqstp, exp, &status); 1316 1317 if (status) 1318 return status; 1319 status = nfsd4_encode_components('/', root, &p, buflen); 1320 if (status) 1321 return status; 1322 if ((*buflen -= 4) < 0) 1323 return nfserr_resource; 1324 WRITE32(fslocs->locations_count); 1325 for (i=0; i<fslocs->locations_count; i++) { 1326 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1327 &p, buflen); 1328 if (status) 1329 return status; 1330 } 1331 *pp = p; 1332 return 0; 1333 } 1334 1335 static u32 nfs4_ftypes[16] = { 1336 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1337 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1338 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1339 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1340 }; 1341 1342 static __be32 1343 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1344 __be32 **p, int *buflen) 1345 { 1346 int status; 1347 1348 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1349 return nfserr_resource; 1350 if (whotype != NFS4_ACL_WHO_NAMED) 1351 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1352 else if (group) 1353 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1354 else 1355 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1356 if (status < 0) 1357 return nfserrno(status); 1358 *p = xdr_encode_opaque(*p, NULL, status); 1359 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1360 BUG_ON(*buflen < 0); 1361 return 0; 1362 } 1363 1364 static inline __be32 1365 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1366 { 1367 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1368 } 1369 1370 static inline __be32 1371 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1372 { 1373 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1374 } 1375 1376 static inline __be32 1377 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1378 __be32 **p, int *buflen) 1379 { 1380 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1381 } 1382 1383 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1384 FATTR4_WORD0_RDATTR_ERROR) 1385 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1386 1387 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1388 { 1389 /* As per referral draft: */ 1390 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1391 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1392 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1393 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1394 *rdattr_err = NFSERR_MOVED; 1395 else 1396 return nfserr_moved; 1397 } 1398 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1399 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1400 return 0; 1401 } 1402 1403 /* 1404 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1405 * ourselves. 1406 * 1407 * @countp is the buffer size in _words_; upon successful return this becomes 1408 * replaced with the number of words written. 1409 */ 1410 __be32 1411 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1412 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1413 struct svc_rqst *rqstp, int ignore_crossmnt) 1414 { 1415 u32 bmval0 = bmval[0]; 1416 u32 bmval1 = bmval[1]; 1417 struct kstat stat; 1418 struct svc_fh tempfh; 1419 struct kstatfs statfs; 1420 int buflen = *countp << 2; 1421 __be32 *attrlenp; 1422 u32 dummy; 1423 u64 dummy64; 1424 u32 rdattr_err = 0; 1425 __be32 *p = buffer; 1426 __be32 status; 1427 int err; 1428 int aclsupport = 0; 1429 struct nfs4_acl *acl = NULL; 1430 1431 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1432 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1433 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1434 1435 if (exp->ex_fslocs.migrated) { 1436 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1437 if (status) 1438 goto out; 1439 } 1440 1441 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1442 if (err) 1443 goto out_nfserr; 1444 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1445 FATTR4_WORD0_MAXNAME)) || 1446 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1447 FATTR4_WORD1_SPACE_TOTAL))) { 1448 err = vfs_statfs(dentry, &statfs); 1449 if (err) 1450 goto out_nfserr; 1451 } 1452 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1453 fh_init(&tempfh, NFS4_FHSIZE); 1454 status = fh_compose(&tempfh, exp, dentry, NULL); 1455 if (status) 1456 goto out; 1457 fhp = &tempfh; 1458 } 1459 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1460 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1461 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1462 aclsupport = (err == 0); 1463 if (bmval0 & FATTR4_WORD0_ACL) { 1464 if (err == -EOPNOTSUPP) 1465 bmval0 &= ~FATTR4_WORD0_ACL; 1466 else if (err == -EINVAL) { 1467 status = nfserr_attrnotsupp; 1468 goto out; 1469 } else if (err != 0) 1470 goto out_nfserr; 1471 } 1472 } 1473 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1474 if (exp->ex_fslocs.locations == NULL) { 1475 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1476 } 1477 } 1478 if ((buflen -= 16) < 0) 1479 goto out_resource; 1480 1481 WRITE32(2); 1482 WRITE32(bmval0); 1483 WRITE32(bmval1); 1484 attrlenp = p++; /* to be backfilled later */ 1485 1486 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1487 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1488 if ((buflen -= 12) < 0) 1489 goto out_resource; 1490 if (!aclsupport) 1491 word0 &= ~FATTR4_WORD0_ACL; 1492 if (!exp->ex_fslocs.locations) 1493 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1494 WRITE32(2); 1495 WRITE32(word0); 1496 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1497 } 1498 if (bmval0 & FATTR4_WORD0_TYPE) { 1499 if ((buflen -= 4) < 0) 1500 goto out_resource; 1501 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1502 if (dummy == NF4BAD) 1503 goto out_serverfault; 1504 WRITE32(dummy); 1505 } 1506 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1507 if ((buflen -= 4) < 0) 1508 goto out_resource; 1509 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1510 WRITE32(NFS4_FH_PERSISTENT); 1511 else 1512 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1513 } 1514 if (bmval0 & FATTR4_WORD0_CHANGE) { 1515 /* 1516 * Note: This _must_ be consistent with the scheme for writing 1517 * change_info, so any changes made here must be reflected there 1518 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1519 * macro above.) 1520 */ 1521 if ((buflen -= 8) < 0) 1522 goto out_resource; 1523 WRITE32(stat.ctime.tv_sec); 1524 WRITE32(stat.ctime.tv_nsec); 1525 } 1526 if (bmval0 & FATTR4_WORD0_SIZE) { 1527 if ((buflen -= 8) < 0) 1528 goto out_resource; 1529 WRITE64(stat.size); 1530 } 1531 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1532 if ((buflen -= 4) < 0) 1533 goto out_resource; 1534 WRITE32(1); 1535 } 1536 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1537 if ((buflen -= 4) < 0) 1538 goto out_resource; 1539 WRITE32(1); 1540 } 1541 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1542 if ((buflen -= 4) < 0) 1543 goto out_resource; 1544 WRITE32(0); 1545 } 1546 if (bmval0 & FATTR4_WORD0_FSID) { 1547 if ((buflen -= 16) < 0) 1548 goto out_resource; 1549 if (exp->ex_fslocs.migrated) { 1550 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1551 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1552 } else switch(fsid_source(fhp)) { 1553 case FSIDSOURCE_FSID: 1554 WRITE64((u64)exp->ex_fsid); 1555 WRITE64((u64)0); 1556 break; 1557 case FSIDSOURCE_DEV: 1558 WRITE32(0); 1559 WRITE32(MAJOR(stat.dev)); 1560 WRITE32(0); 1561 WRITE32(MINOR(stat.dev)); 1562 break; 1563 case FSIDSOURCE_UUID: 1564 WRITEMEM(exp->ex_uuid, 16); 1565 break; 1566 } 1567 } 1568 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1569 if ((buflen -= 4) < 0) 1570 goto out_resource; 1571 WRITE32(0); 1572 } 1573 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1574 if ((buflen -= 4) < 0) 1575 goto out_resource; 1576 WRITE32(NFSD_LEASE_TIME); 1577 } 1578 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1579 if ((buflen -= 4) < 0) 1580 goto out_resource; 1581 WRITE32(rdattr_err); 1582 } 1583 if (bmval0 & FATTR4_WORD0_ACL) { 1584 struct nfs4_ace *ace; 1585 1586 if (acl == NULL) { 1587 if ((buflen -= 4) < 0) 1588 goto out_resource; 1589 1590 WRITE32(0); 1591 goto out_acl; 1592 } 1593 if ((buflen -= 4) < 0) 1594 goto out_resource; 1595 WRITE32(acl->naces); 1596 1597 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1598 if ((buflen -= 4*3) < 0) 1599 goto out_resource; 1600 WRITE32(ace->type); 1601 WRITE32(ace->flag); 1602 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1603 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1604 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1605 &p, &buflen); 1606 if (status == nfserr_resource) 1607 goto out_resource; 1608 if (status) 1609 goto out; 1610 } 1611 } 1612 out_acl: 1613 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1614 if ((buflen -= 4) < 0) 1615 goto out_resource; 1616 WRITE32(aclsupport ? 1617 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1618 } 1619 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1620 if ((buflen -= 4) < 0) 1621 goto out_resource; 1622 WRITE32(1); 1623 } 1624 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1625 if ((buflen -= 4) < 0) 1626 goto out_resource; 1627 WRITE32(1); 1628 } 1629 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1630 if ((buflen -= 4) < 0) 1631 goto out_resource; 1632 WRITE32(1); 1633 } 1634 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1635 if ((buflen -= 4) < 0) 1636 goto out_resource; 1637 WRITE32(1); 1638 } 1639 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1640 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1641 if (buflen < 0) 1642 goto out_resource; 1643 WRITE32(fhp->fh_handle.fh_size); 1644 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1645 } 1646 if (bmval0 & FATTR4_WORD0_FILEID) { 1647 if ((buflen -= 8) < 0) 1648 goto out_resource; 1649 WRITE64(stat.ino); 1650 } 1651 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1652 if ((buflen -= 8) < 0) 1653 goto out_resource; 1654 WRITE64((u64) statfs.f_ffree); 1655 } 1656 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1657 if ((buflen -= 8) < 0) 1658 goto out_resource; 1659 WRITE64((u64) statfs.f_ffree); 1660 } 1661 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1662 if ((buflen -= 8) < 0) 1663 goto out_resource; 1664 WRITE64((u64) statfs.f_files); 1665 } 1666 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1667 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1668 if (status == nfserr_resource) 1669 goto out_resource; 1670 if (status) 1671 goto out; 1672 } 1673 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1674 if ((buflen -= 4) < 0) 1675 goto out_resource; 1676 WRITE32(1); 1677 } 1678 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1679 if ((buflen -= 8) < 0) 1680 goto out_resource; 1681 WRITE64(~(u64)0); 1682 } 1683 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1684 if ((buflen -= 4) < 0) 1685 goto out_resource; 1686 WRITE32(255); 1687 } 1688 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1689 if ((buflen -= 4) < 0) 1690 goto out_resource; 1691 WRITE32(statfs.f_namelen); 1692 } 1693 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1694 if ((buflen -= 8) < 0) 1695 goto out_resource; 1696 WRITE64((u64) svc_max_payload(rqstp)); 1697 } 1698 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1699 if ((buflen -= 8) < 0) 1700 goto out_resource; 1701 WRITE64((u64) svc_max_payload(rqstp)); 1702 } 1703 if (bmval1 & FATTR4_WORD1_MODE) { 1704 if ((buflen -= 4) < 0) 1705 goto out_resource; 1706 WRITE32(stat.mode & S_IALLUGO); 1707 } 1708 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1709 if ((buflen -= 4) < 0) 1710 goto out_resource; 1711 WRITE32(1); 1712 } 1713 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1714 if ((buflen -= 4) < 0) 1715 goto out_resource; 1716 WRITE32(stat.nlink); 1717 } 1718 if (bmval1 & FATTR4_WORD1_OWNER) { 1719 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1720 if (status == nfserr_resource) 1721 goto out_resource; 1722 if (status) 1723 goto out; 1724 } 1725 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1726 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1727 if (status == nfserr_resource) 1728 goto out_resource; 1729 if (status) 1730 goto out; 1731 } 1732 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1733 if ((buflen -= 8) < 0) 1734 goto out_resource; 1735 WRITE32((u32) MAJOR(stat.rdev)); 1736 WRITE32((u32) MINOR(stat.rdev)); 1737 } 1738 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1739 if ((buflen -= 8) < 0) 1740 goto out_resource; 1741 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1742 WRITE64(dummy64); 1743 } 1744 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1745 if ((buflen -= 8) < 0) 1746 goto out_resource; 1747 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1748 WRITE64(dummy64); 1749 } 1750 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1751 if ((buflen -= 8) < 0) 1752 goto out_resource; 1753 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1754 WRITE64(dummy64); 1755 } 1756 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1757 if ((buflen -= 8) < 0) 1758 goto out_resource; 1759 dummy64 = (u64)stat.blocks << 9; 1760 WRITE64(dummy64); 1761 } 1762 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1763 if ((buflen -= 12) < 0) 1764 goto out_resource; 1765 WRITE32(0); 1766 WRITE32(stat.atime.tv_sec); 1767 WRITE32(stat.atime.tv_nsec); 1768 } 1769 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1770 if ((buflen -= 12) < 0) 1771 goto out_resource; 1772 WRITE32(0); 1773 WRITE32(1); 1774 WRITE32(0); 1775 } 1776 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1777 if ((buflen -= 12) < 0) 1778 goto out_resource; 1779 WRITE32(0); 1780 WRITE32(stat.ctime.tv_sec); 1781 WRITE32(stat.ctime.tv_nsec); 1782 } 1783 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1784 if ((buflen -= 12) < 0) 1785 goto out_resource; 1786 WRITE32(0); 1787 WRITE32(stat.mtime.tv_sec); 1788 WRITE32(stat.mtime.tv_nsec); 1789 } 1790 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1791 if ((buflen -= 8) < 0) 1792 goto out_resource; 1793 /* 1794 * Get parent's attributes if not ignoring crossmount 1795 * and this is the root of a cross-mounted filesystem. 1796 */ 1797 if (ignore_crossmnt == 0 && 1798 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { 1799 err = vfs_getattr(exp->ex_path.mnt->mnt_parent, 1800 exp->ex_path.mnt->mnt_mountpoint, &stat); 1801 if (err) 1802 goto out_nfserr; 1803 } 1804 WRITE64(stat.ino); 1805 } 1806 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1807 *countp = p - buffer; 1808 status = nfs_ok; 1809 1810 out: 1811 kfree(acl); 1812 if (fhp == &tempfh) 1813 fh_put(&tempfh); 1814 return status; 1815 out_nfserr: 1816 status = nfserrno(err); 1817 goto out; 1818 out_resource: 1819 *countp = 0; 1820 status = nfserr_resource; 1821 goto out; 1822 out_serverfault: 1823 status = nfserr_serverfault; 1824 goto out; 1825 } 1826 1827 static inline int attributes_need_mount(u32 *bmval) 1828 { 1829 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 1830 return 1; 1831 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 1832 return 1; 1833 return 0; 1834 } 1835 1836 static __be32 1837 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1838 const char *name, int namlen, __be32 *p, int *buflen) 1839 { 1840 struct svc_export *exp = cd->rd_fhp->fh_export; 1841 struct dentry *dentry; 1842 __be32 nfserr; 1843 int ignore_crossmnt = 0; 1844 1845 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1846 if (IS_ERR(dentry)) 1847 return nfserrno(PTR_ERR(dentry)); 1848 1849 exp_get(exp); 1850 /* 1851 * In the case of a mountpoint, the client may be asking for 1852 * attributes that are only properties of the underlying filesystem 1853 * as opposed to the cross-mounted file system. In such a case, 1854 * we will not follow the cross mount and will fill the attribtutes 1855 * directly from the mountpoint dentry. 1856 */ 1857 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval)) 1858 ignore_crossmnt = 1; 1859 else if (d_mountpoint(dentry)) { 1860 int err; 1861 1862 /* 1863 * Why the heck aren't we just using nfsd_lookup?? 1864 * Different "."/".." handling? Something else? 1865 * At least, add a comment here to explain.... 1866 */ 1867 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1868 if (err) { 1869 nfserr = nfserrno(err); 1870 goto out_put; 1871 } 1872 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 1873 if (nfserr) 1874 goto out_put; 1875 1876 } 1877 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1878 cd->rd_rqstp, ignore_crossmnt); 1879 out_put: 1880 dput(dentry); 1881 exp_put(exp); 1882 return nfserr; 1883 } 1884 1885 static __be32 * 1886 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1887 { 1888 __be32 *attrlenp; 1889 1890 if (buflen < 6) 1891 return NULL; 1892 *p++ = htonl(2); 1893 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1894 *p++ = htonl(0); /* bmval1 */ 1895 1896 attrlenp = p++; 1897 *p++ = nfserr; /* no htonl */ 1898 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1899 return p; 1900 } 1901 1902 static int 1903 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1904 loff_t offset, u64 ino, unsigned int d_type) 1905 { 1906 struct readdir_cd *ccd = ccdv; 1907 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1908 int buflen; 1909 __be32 *p = cd->buffer; 1910 __be32 nfserr = nfserr_toosmall; 1911 1912 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1913 if (name && isdotent(name, namlen)) { 1914 cd->common.err = nfs_ok; 1915 return 0; 1916 } 1917 1918 if (cd->offset) 1919 xdr_encode_hyper(cd->offset, (u64) offset); 1920 1921 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1922 if (buflen < 0) 1923 goto fail; 1924 1925 *p++ = xdr_one; /* mark entry present */ 1926 cd->offset = p; /* remember pointer */ 1927 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1928 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1929 1930 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1931 switch (nfserr) { 1932 case nfs_ok: 1933 p += buflen; 1934 break; 1935 case nfserr_resource: 1936 nfserr = nfserr_toosmall; 1937 goto fail; 1938 case nfserr_dropit: 1939 goto fail; 1940 default: 1941 /* 1942 * If the client requested the RDATTR_ERROR attribute, 1943 * we stuff the error code into this attribute 1944 * and continue. If this attribute was not requested, 1945 * then in accordance with the spec, we fail the 1946 * entire READDIR operation(!) 1947 */ 1948 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1949 goto fail; 1950 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1951 if (p == NULL) { 1952 nfserr = nfserr_toosmall; 1953 goto fail; 1954 } 1955 } 1956 cd->buflen -= (p - cd->buffer); 1957 cd->buffer = p; 1958 cd->common.err = nfs_ok; 1959 return 0; 1960 fail: 1961 cd->common.err = nfserr; 1962 return -EINVAL; 1963 } 1964 1965 static void 1966 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 1967 { 1968 ENCODE_HEAD; 1969 1970 RESERVE_SPACE(sizeof(stateid_t)); 1971 WRITE32(sid->si_generation); 1972 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 1973 ADJUST_ARGS(); 1974 } 1975 1976 static __be32 1977 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1978 { 1979 ENCODE_HEAD; 1980 1981 if (!nfserr) { 1982 RESERVE_SPACE(8); 1983 WRITE32(access->ac_supported); 1984 WRITE32(access->ac_resp_access); 1985 ADJUST_ARGS(); 1986 } 1987 return nfserr; 1988 } 1989 1990 static __be32 1991 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 1992 { 1993 ENCODE_SEQID_OP_HEAD; 1994 1995 if (!nfserr) 1996 nfsd4_encode_stateid(resp, &close->cl_stateid); 1997 1998 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 1999 return nfserr; 2000 } 2001 2002 2003 static __be32 2004 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2005 { 2006 ENCODE_HEAD; 2007 2008 if (!nfserr) { 2009 RESERVE_SPACE(8); 2010 WRITEMEM(commit->co_verf.data, 8); 2011 ADJUST_ARGS(); 2012 } 2013 return nfserr; 2014 } 2015 2016 static __be32 2017 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2018 { 2019 ENCODE_HEAD; 2020 2021 if (!nfserr) { 2022 RESERVE_SPACE(32); 2023 WRITECINFO(create->cr_cinfo); 2024 WRITE32(2); 2025 WRITE32(create->cr_bmval[0]); 2026 WRITE32(create->cr_bmval[1]); 2027 ADJUST_ARGS(); 2028 } 2029 return nfserr; 2030 } 2031 2032 static __be32 2033 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2034 { 2035 struct svc_fh *fhp = getattr->ga_fhp; 2036 int buflen; 2037 2038 if (nfserr) 2039 return nfserr; 2040 2041 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2042 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2043 resp->p, &buflen, getattr->ga_bmval, 2044 resp->rqstp, 0); 2045 if (!nfserr) 2046 resp->p += buflen; 2047 return nfserr; 2048 } 2049 2050 static __be32 2051 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2052 { 2053 struct svc_fh *fhp = *fhpp; 2054 unsigned int len; 2055 ENCODE_HEAD; 2056 2057 if (!nfserr) { 2058 len = fhp->fh_handle.fh_size; 2059 RESERVE_SPACE(len + 4); 2060 WRITE32(len); 2061 WRITEMEM(&fhp->fh_handle.fh_base, len); 2062 ADJUST_ARGS(); 2063 } 2064 return nfserr; 2065 } 2066 2067 /* 2068 * Including all fields other than the name, a LOCK4denied structure requires 2069 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2070 */ 2071 static void 2072 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2073 { 2074 ENCODE_HEAD; 2075 2076 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2077 WRITE64(ld->ld_start); 2078 WRITE64(ld->ld_length); 2079 WRITE32(ld->ld_type); 2080 if (ld->ld_sop) { 2081 WRITEMEM(&ld->ld_clientid, 8); 2082 WRITE32(ld->ld_sop->so_owner.len); 2083 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2084 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2085 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2086 WRITE64((u64)0); /* clientid */ 2087 WRITE32(0); /* length of owner name */ 2088 } 2089 ADJUST_ARGS(); 2090 } 2091 2092 static __be32 2093 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2094 { 2095 ENCODE_SEQID_OP_HEAD; 2096 2097 if (!nfserr) 2098 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2099 else if (nfserr == nfserr_denied) 2100 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2101 2102 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2103 return nfserr; 2104 } 2105 2106 static __be32 2107 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2108 { 2109 if (nfserr == nfserr_denied) 2110 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2111 return nfserr; 2112 } 2113 2114 static __be32 2115 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2116 { 2117 ENCODE_SEQID_OP_HEAD; 2118 2119 if (!nfserr) 2120 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2121 2122 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2123 return nfserr; 2124 } 2125 2126 2127 static __be32 2128 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2129 { 2130 ENCODE_HEAD; 2131 2132 if (!nfserr) { 2133 RESERVE_SPACE(20); 2134 WRITECINFO(link->li_cinfo); 2135 ADJUST_ARGS(); 2136 } 2137 return nfserr; 2138 } 2139 2140 2141 static __be32 2142 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2143 { 2144 ENCODE_HEAD; 2145 ENCODE_SEQID_OP_HEAD; 2146 2147 if (nfserr) 2148 goto out; 2149 2150 nfsd4_encode_stateid(resp, &open->op_stateid); 2151 RESERVE_SPACE(40); 2152 WRITECINFO(open->op_cinfo); 2153 WRITE32(open->op_rflags); 2154 WRITE32(2); 2155 WRITE32(open->op_bmval[0]); 2156 WRITE32(open->op_bmval[1]); 2157 WRITE32(open->op_delegate_type); 2158 ADJUST_ARGS(); 2159 2160 switch (open->op_delegate_type) { 2161 case NFS4_OPEN_DELEGATE_NONE: 2162 break; 2163 case NFS4_OPEN_DELEGATE_READ: 2164 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2165 RESERVE_SPACE(20); 2166 WRITE32(open->op_recall); 2167 2168 /* 2169 * TODO: ACE's in delegations 2170 */ 2171 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2172 WRITE32(0); 2173 WRITE32(0); 2174 WRITE32(0); /* XXX: is NULL principal ok? */ 2175 ADJUST_ARGS(); 2176 break; 2177 case NFS4_OPEN_DELEGATE_WRITE: 2178 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2179 RESERVE_SPACE(32); 2180 WRITE32(0); 2181 2182 /* 2183 * TODO: space_limit's in delegations 2184 */ 2185 WRITE32(NFS4_LIMIT_SIZE); 2186 WRITE32(~(u32)0); 2187 WRITE32(~(u32)0); 2188 2189 /* 2190 * TODO: ACE's in delegations 2191 */ 2192 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2193 WRITE32(0); 2194 WRITE32(0); 2195 WRITE32(0); /* XXX: is NULL principal ok? */ 2196 ADJUST_ARGS(); 2197 break; 2198 default: 2199 BUG(); 2200 } 2201 /* XXX save filehandle here */ 2202 out: 2203 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2204 return nfserr; 2205 } 2206 2207 static __be32 2208 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2209 { 2210 ENCODE_SEQID_OP_HEAD; 2211 2212 if (!nfserr) 2213 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2214 2215 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2216 return nfserr; 2217 } 2218 2219 static __be32 2220 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2221 { 2222 ENCODE_SEQID_OP_HEAD; 2223 2224 if (!nfserr) 2225 nfsd4_encode_stateid(resp, &od->od_stateid); 2226 2227 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2228 return nfserr; 2229 } 2230 2231 static __be32 2232 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2233 struct nfsd4_read *read) 2234 { 2235 u32 eof; 2236 int v, pn; 2237 unsigned long maxcount; 2238 long len; 2239 ENCODE_HEAD; 2240 2241 if (nfserr) 2242 return nfserr; 2243 if (resp->xbuf->page_len) 2244 return nfserr_resource; 2245 2246 RESERVE_SPACE(8); /* eof flag and byte count */ 2247 2248 maxcount = svc_max_payload(resp->rqstp); 2249 if (maxcount > read->rd_length) 2250 maxcount = read->rd_length; 2251 2252 len = maxcount; 2253 v = 0; 2254 while (len > 0) { 2255 pn = resp->rqstp->rq_resused++; 2256 resp->rqstp->rq_vec[v].iov_base = 2257 page_address(resp->rqstp->rq_respages[pn]); 2258 resp->rqstp->rq_vec[v].iov_len = 2259 len < PAGE_SIZE ? len : PAGE_SIZE; 2260 v++; 2261 len -= PAGE_SIZE; 2262 } 2263 read->rd_vlen = v; 2264 2265 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2266 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2267 &maxcount); 2268 2269 if (nfserr == nfserr_symlink) 2270 nfserr = nfserr_inval; 2271 if (nfserr) 2272 return nfserr; 2273 eof = (read->rd_offset + maxcount >= 2274 read->rd_fhp->fh_dentry->d_inode->i_size); 2275 2276 WRITE32(eof); 2277 WRITE32(maxcount); 2278 ADJUST_ARGS(); 2279 resp->xbuf->head[0].iov_len = (char*)p 2280 - (char*)resp->xbuf->head[0].iov_base; 2281 resp->xbuf->page_len = maxcount; 2282 2283 /* Use rest of head for padding and remaining ops: */ 2284 resp->xbuf->tail[0].iov_base = p; 2285 resp->xbuf->tail[0].iov_len = 0; 2286 if (maxcount&3) { 2287 RESERVE_SPACE(4); 2288 WRITE32(0); 2289 resp->xbuf->tail[0].iov_base += maxcount&3; 2290 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2291 ADJUST_ARGS(); 2292 } 2293 return 0; 2294 } 2295 2296 static __be32 2297 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2298 { 2299 int maxcount; 2300 char *page; 2301 ENCODE_HEAD; 2302 2303 if (nfserr) 2304 return nfserr; 2305 if (resp->xbuf->page_len) 2306 return nfserr_resource; 2307 2308 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2309 2310 maxcount = PAGE_SIZE; 2311 RESERVE_SPACE(4); 2312 2313 /* 2314 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2315 * if they would overflow the buffer. Is this kosher in NFSv4? If 2316 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2317 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2318 */ 2319 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2320 if (nfserr == nfserr_isdir) 2321 return nfserr_inval; 2322 if (nfserr) 2323 return nfserr; 2324 2325 WRITE32(maxcount); 2326 ADJUST_ARGS(); 2327 resp->xbuf->head[0].iov_len = (char*)p 2328 - (char*)resp->xbuf->head[0].iov_base; 2329 resp->xbuf->page_len = maxcount; 2330 2331 /* Use rest of head for padding and remaining ops: */ 2332 resp->xbuf->tail[0].iov_base = p; 2333 resp->xbuf->tail[0].iov_len = 0; 2334 if (maxcount&3) { 2335 RESERVE_SPACE(4); 2336 WRITE32(0); 2337 resp->xbuf->tail[0].iov_base += maxcount&3; 2338 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2339 ADJUST_ARGS(); 2340 } 2341 return 0; 2342 } 2343 2344 static __be32 2345 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2346 { 2347 int maxcount; 2348 loff_t offset; 2349 __be32 *page, *savep, *tailbase; 2350 ENCODE_HEAD; 2351 2352 if (nfserr) 2353 return nfserr; 2354 if (resp->xbuf->page_len) 2355 return nfserr_resource; 2356 2357 RESERVE_SPACE(8); /* verifier */ 2358 savep = p; 2359 2360 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2361 WRITE32(0); 2362 WRITE32(0); 2363 ADJUST_ARGS(); 2364 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2365 tailbase = p; 2366 2367 maxcount = PAGE_SIZE; 2368 if (maxcount > readdir->rd_maxcount) 2369 maxcount = readdir->rd_maxcount; 2370 2371 /* 2372 * Convert from bytes to words, account for the two words already 2373 * written, make sure to leave two words at the end for the next 2374 * pointer and eof field. 2375 */ 2376 maxcount = (maxcount >> 2) - 4; 2377 if (maxcount < 0) { 2378 nfserr = nfserr_toosmall; 2379 goto err_no_verf; 2380 } 2381 2382 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2383 readdir->common.err = 0; 2384 readdir->buflen = maxcount; 2385 readdir->buffer = page; 2386 readdir->offset = NULL; 2387 2388 offset = readdir->rd_cookie; 2389 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2390 &offset, 2391 &readdir->common, nfsd4_encode_dirent); 2392 if (nfserr == nfs_ok && 2393 readdir->common.err == nfserr_toosmall && 2394 readdir->buffer == page) 2395 nfserr = nfserr_toosmall; 2396 if (nfserr == nfserr_symlink) 2397 nfserr = nfserr_notdir; 2398 if (nfserr) 2399 goto err_no_verf; 2400 2401 if (readdir->offset) 2402 xdr_encode_hyper(readdir->offset, offset); 2403 2404 p = readdir->buffer; 2405 *p++ = 0; /* no more entries */ 2406 *p++ = htonl(readdir->common.err == nfserr_eof); 2407 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2408 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2409 2410 /* Use rest of head for padding and remaining ops: */ 2411 resp->xbuf->tail[0].iov_base = tailbase; 2412 resp->xbuf->tail[0].iov_len = 0; 2413 resp->p = resp->xbuf->tail[0].iov_base; 2414 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2415 2416 return 0; 2417 err_no_verf: 2418 p = savep; 2419 ADJUST_ARGS(); 2420 return nfserr; 2421 } 2422 2423 static __be32 2424 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2425 { 2426 ENCODE_HEAD; 2427 2428 if (!nfserr) { 2429 RESERVE_SPACE(20); 2430 WRITECINFO(remove->rm_cinfo); 2431 ADJUST_ARGS(); 2432 } 2433 return nfserr; 2434 } 2435 2436 static __be32 2437 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2438 { 2439 ENCODE_HEAD; 2440 2441 if (!nfserr) { 2442 RESERVE_SPACE(40); 2443 WRITECINFO(rename->rn_sinfo); 2444 WRITECINFO(rename->rn_tinfo); 2445 ADJUST_ARGS(); 2446 } 2447 return nfserr; 2448 } 2449 2450 static __be32 2451 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2452 struct nfsd4_secinfo *secinfo) 2453 { 2454 int i = 0; 2455 struct svc_export *exp = secinfo->si_exp; 2456 u32 nflavs; 2457 struct exp_flavor_info *flavs; 2458 struct exp_flavor_info def_flavs[2]; 2459 ENCODE_HEAD; 2460 2461 if (nfserr) 2462 goto out; 2463 if (exp->ex_nflavors) { 2464 flavs = exp->ex_flavors; 2465 nflavs = exp->ex_nflavors; 2466 } else { /* Handling of some defaults in absence of real secinfo: */ 2467 flavs = def_flavs; 2468 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2469 nflavs = 2; 2470 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2471 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2472 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2473 nflavs = 1; 2474 flavs[0].pseudoflavor 2475 = svcauth_gss_flavor(exp->ex_client); 2476 } else { 2477 nflavs = 1; 2478 flavs[0].pseudoflavor 2479 = exp->ex_client->flavour->flavour; 2480 } 2481 } 2482 2483 RESERVE_SPACE(4); 2484 WRITE32(nflavs); 2485 ADJUST_ARGS(); 2486 for (i = 0; i < nflavs; i++) { 2487 u32 flav = flavs[i].pseudoflavor; 2488 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2489 2490 if (gm) { 2491 RESERVE_SPACE(4); 2492 WRITE32(RPC_AUTH_GSS); 2493 ADJUST_ARGS(); 2494 RESERVE_SPACE(4 + gm->gm_oid.len); 2495 WRITE32(gm->gm_oid.len); 2496 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2497 ADJUST_ARGS(); 2498 RESERVE_SPACE(4); 2499 WRITE32(0); /* qop */ 2500 ADJUST_ARGS(); 2501 RESERVE_SPACE(4); 2502 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2503 ADJUST_ARGS(); 2504 gss_mech_put(gm); 2505 } else { 2506 RESERVE_SPACE(4); 2507 WRITE32(flav); 2508 ADJUST_ARGS(); 2509 } 2510 } 2511 out: 2512 if (exp) 2513 exp_put(exp); 2514 return nfserr; 2515 } 2516 2517 /* 2518 * The SETATTR encode routine is special -- it always encodes a bitmap, 2519 * regardless of the error status. 2520 */ 2521 static __be32 2522 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2523 { 2524 ENCODE_HEAD; 2525 2526 RESERVE_SPACE(12); 2527 if (nfserr) { 2528 WRITE32(2); 2529 WRITE32(0); 2530 WRITE32(0); 2531 } 2532 else { 2533 WRITE32(2); 2534 WRITE32(setattr->sa_bmval[0]); 2535 WRITE32(setattr->sa_bmval[1]); 2536 } 2537 ADJUST_ARGS(); 2538 return nfserr; 2539 } 2540 2541 static __be32 2542 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2543 { 2544 ENCODE_HEAD; 2545 2546 if (!nfserr) { 2547 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2548 WRITEMEM(&scd->se_clientid, 8); 2549 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2550 ADJUST_ARGS(); 2551 } 2552 else if (nfserr == nfserr_clid_inuse) { 2553 RESERVE_SPACE(8); 2554 WRITE32(0); 2555 WRITE32(0); 2556 ADJUST_ARGS(); 2557 } 2558 return nfserr; 2559 } 2560 2561 static __be32 2562 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2563 { 2564 ENCODE_HEAD; 2565 2566 if (!nfserr) { 2567 RESERVE_SPACE(16); 2568 WRITE32(write->wr_bytes_written); 2569 WRITE32(write->wr_how_written); 2570 WRITEMEM(write->wr_verifier.data, 8); 2571 ADJUST_ARGS(); 2572 } 2573 return nfserr; 2574 } 2575 2576 static __be32 2577 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 2578 { 2579 return nfserr; 2580 } 2581 2582 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 2583 2584 static nfsd4_enc nfsd4_enc_ops[] = { 2585 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 2586 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 2587 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 2588 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 2589 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 2590 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 2591 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 2592 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 2593 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 2594 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 2595 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 2596 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 2597 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 2598 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 2599 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 2600 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 2601 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 2602 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 2603 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 2604 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 2605 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 2606 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 2607 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 2608 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 2609 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 2610 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 2611 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 2612 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 2613 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 2614 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 2615 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 2616 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 2617 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 2618 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 2619 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 2620 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 2621 }; 2622 2623 void 2624 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2625 { 2626 __be32 *statp; 2627 ENCODE_HEAD; 2628 2629 RESERVE_SPACE(8); 2630 WRITE32(op->opnum); 2631 statp = p++; /* to be backfilled at the end */ 2632 ADJUST_ARGS(); 2633 2634 if (op->opnum == OP_ILLEGAL) 2635 goto status; 2636 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 2637 !nfsd4_enc_ops[op->opnum]); 2638 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 2639 status: 2640 /* 2641 * Note: We write the status directly, instead of using WRITE32(), 2642 * since it is already in network byte order. 2643 */ 2644 *statp = op->status; 2645 } 2646 2647 /* 2648 * Encode the reply stored in the stateowner reply cache 2649 * 2650 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2651 * previously sent already encoded operation. 2652 * 2653 * called with nfs4_lock_state() held 2654 */ 2655 void 2656 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2657 { 2658 ENCODE_HEAD; 2659 struct nfs4_replay *rp = op->replay; 2660 2661 BUG_ON(!rp); 2662 2663 RESERVE_SPACE(8); 2664 WRITE32(op->opnum); 2665 *p++ = rp->rp_status; /* already xdr'ed */ 2666 ADJUST_ARGS(); 2667 2668 RESERVE_SPACE(rp->rp_buflen); 2669 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2670 ADJUST_ARGS(); 2671 } 2672 2673 /* 2674 * END OF "GENERIC" ENCODE ROUTINES. 2675 */ 2676 2677 int 2678 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2679 { 2680 return xdr_ressize_check(rqstp, p); 2681 } 2682 2683 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2684 { 2685 if (args->ops != args->iops) { 2686 kfree(args->ops); 2687 args->ops = args->iops; 2688 } 2689 kfree(args->tmpp); 2690 args->tmpp = NULL; 2691 while (args->to_free) { 2692 struct tmpbuf *tb = args->to_free; 2693 args->to_free = tb->next; 2694 tb->release(tb->buf); 2695 kfree(tb); 2696 } 2697 } 2698 2699 int 2700 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2701 { 2702 __be32 status; 2703 2704 args->p = p; 2705 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2706 args->pagelist = rqstp->rq_arg.pages; 2707 args->pagelen = rqstp->rq_arg.page_len; 2708 args->tmpp = NULL; 2709 args->to_free = NULL; 2710 args->ops = args->iops; 2711 args->rqstp = rqstp; 2712 2713 status = nfsd4_decode_compound(args); 2714 if (status) { 2715 nfsd4_release_compoundargs(args); 2716 } 2717 return !status; 2718 } 2719 2720 int 2721 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2722 { 2723 /* 2724 * All that remains is to write the tag and operation count... 2725 */ 2726 struct kvec *iov; 2727 p = resp->tagp; 2728 *p++ = htonl(resp->taglen); 2729 memcpy(p, resp->tag, resp->taglen); 2730 p += XDR_QUADLEN(resp->taglen); 2731 *p++ = htonl(resp->opcnt); 2732 2733 if (rqstp->rq_res.page_len) 2734 iov = &rqstp->rq_res.tail[0]; 2735 else 2736 iov = &rqstp->rq_res.head[0]; 2737 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2738 BUG_ON(iov->iov_len > PAGE_SIZE); 2739 return 1; 2740 } 2741 2742 /* 2743 * Local variables: 2744 * c-basic-offset: 8 2745 * End: 2746 */ 2747