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_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 417 { 418 DECODE_HEAD; 419 420 READ_BUF(4); 421 READ32(access->ac_req_access); 422 423 DECODE_TAIL; 424 } 425 426 static __be32 427 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 428 { 429 DECODE_HEAD; 430 431 close->cl_stateowner = NULL; 432 READ_BUF(4 + sizeof(stateid_t)); 433 READ32(close->cl_seqid); 434 READ32(close->cl_stateid.si_generation); 435 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 436 437 DECODE_TAIL; 438 } 439 440 441 static __be32 442 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 443 { 444 DECODE_HEAD; 445 446 READ_BUF(12); 447 READ64(commit->co_offset); 448 READ32(commit->co_count); 449 450 DECODE_TAIL; 451 } 452 453 static __be32 454 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 455 { 456 DECODE_HEAD; 457 458 READ_BUF(4); 459 READ32(create->cr_type); 460 switch (create->cr_type) { 461 case NF4LNK: 462 READ_BUF(4); 463 READ32(create->cr_linklen); 464 READ_BUF(create->cr_linklen); 465 SAVEMEM(create->cr_linkname, create->cr_linklen); 466 break; 467 case NF4BLK: 468 case NF4CHR: 469 READ_BUF(8); 470 READ32(create->cr_specdata1); 471 READ32(create->cr_specdata2); 472 break; 473 case NF4SOCK: 474 case NF4FIFO: 475 case NF4DIR: 476 default: 477 break; 478 } 479 480 READ_BUF(4); 481 READ32(create->cr_namelen); 482 READ_BUF(create->cr_namelen); 483 SAVEMEM(create->cr_name, create->cr_namelen); 484 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 485 return status; 486 487 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 488 goto out; 489 490 DECODE_TAIL; 491 } 492 493 static inline __be32 494 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 495 { 496 DECODE_HEAD; 497 498 READ_BUF(sizeof(stateid_t)); 499 READ32(dr->dr_stateid.si_generation); 500 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 501 502 DECODE_TAIL; 503 } 504 505 static inline __be32 506 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 507 { 508 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 509 } 510 511 static __be32 512 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 513 { 514 DECODE_HEAD; 515 516 READ_BUF(4); 517 READ32(link->li_namelen); 518 READ_BUF(link->li_namelen); 519 SAVEMEM(link->li_name, link->li_namelen); 520 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 521 return status; 522 523 DECODE_TAIL; 524 } 525 526 static __be32 527 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 528 { 529 DECODE_HEAD; 530 531 lock->lk_replay_owner = NULL; 532 /* 533 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 534 */ 535 READ_BUF(28); 536 READ32(lock->lk_type); 537 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 538 goto xdr_error; 539 READ32(lock->lk_reclaim); 540 READ64(lock->lk_offset); 541 READ64(lock->lk_length); 542 READ32(lock->lk_is_new); 543 544 if (lock->lk_is_new) { 545 READ_BUF(36); 546 READ32(lock->lk_new_open_seqid); 547 READ32(lock->lk_new_open_stateid.si_generation); 548 549 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 550 READ32(lock->lk_new_lock_seqid); 551 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 552 READ32(lock->lk_new_owner.len); 553 READ_BUF(lock->lk_new_owner.len); 554 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 555 } else { 556 READ_BUF(20); 557 READ32(lock->lk_old_lock_stateid.si_generation); 558 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 559 READ32(lock->lk_old_lock_seqid); 560 } 561 562 DECODE_TAIL; 563 } 564 565 static __be32 566 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 567 { 568 DECODE_HEAD; 569 570 READ_BUF(32); 571 READ32(lockt->lt_type); 572 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 573 goto xdr_error; 574 READ64(lockt->lt_offset); 575 READ64(lockt->lt_length); 576 COPYMEM(&lockt->lt_clientid, 8); 577 READ32(lockt->lt_owner.len); 578 READ_BUF(lockt->lt_owner.len); 579 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 580 581 DECODE_TAIL; 582 } 583 584 static __be32 585 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 586 { 587 DECODE_HEAD; 588 589 locku->lu_stateowner = NULL; 590 READ_BUF(24 + sizeof(stateid_t)); 591 READ32(locku->lu_type); 592 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 593 goto xdr_error; 594 READ32(locku->lu_seqid); 595 READ32(locku->lu_stateid.si_generation); 596 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 597 READ64(locku->lu_offset); 598 READ64(locku->lu_length); 599 600 DECODE_TAIL; 601 } 602 603 static __be32 604 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 605 { 606 DECODE_HEAD; 607 608 READ_BUF(4); 609 READ32(lookup->lo_len); 610 READ_BUF(lookup->lo_len); 611 SAVEMEM(lookup->lo_name, lookup->lo_len); 612 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 613 return status; 614 615 DECODE_TAIL; 616 } 617 618 static __be32 619 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 620 { 621 DECODE_HEAD; 622 623 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 624 open->op_iattr.ia_valid = 0; 625 open->op_stateowner = NULL; 626 627 /* seqid, share_access, share_deny, clientid, ownerlen */ 628 READ_BUF(16 + sizeof(clientid_t)); 629 READ32(open->op_seqid); 630 READ32(open->op_share_access); 631 READ32(open->op_share_deny); 632 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 633 READ32(open->op_owner.len); 634 635 /* owner, open_flag */ 636 READ_BUF(open->op_owner.len + 4); 637 SAVEMEM(open->op_owner.data, open->op_owner.len); 638 READ32(open->op_create); 639 switch (open->op_create) { 640 case NFS4_OPEN_NOCREATE: 641 break; 642 case NFS4_OPEN_CREATE: 643 READ_BUF(4); 644 READ32(open->op_createmode); 645 switch (open->op_createmode) { 646 case NFS4_CREATE_UNCHECKED: 647 case NFS4_CREATE_GUARDED: 648 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 649 goto out; 650 break; 651 case NFS4_CREATE_EXCLUSIVE: 652 READ_BUF(8); 653 COPYMEM(open->op_verf.data, 8); 654 break; 655 default: 656 goto xdr_error; 657 } 658 break; 659 default: 660 goto xdr_error; 661 } 662 663 /* open_claim */ 664 READ_BUF(4); 665 READ32(open->op_claim_type); 666 switch (open->op_claim_type) { 667 case NFS4_OPEN_CLAIM_NULL: 668 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 669 READ_BUF(4); 670 READ32(open->op_fname.len); 671 READ_BUF(open->op_fname.len); 672 SAVEMEM(open->op_fname.data, open->op_fname.len); 673 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 674 return status; 675 break; 676 case NFS4_OPEN_CLAIM_PREVIOUS: 677 READ_BUF(4); 678 READ32(open->op_delegate_type); 679 break; 680 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 681 READ_BUF(sizeof(stateid_t) + 4); 682 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 683 READ32(open->op_fname.len); 684 READ_BUF(open->op_fname.len); 685 SAVEMEM(open->op_fname.data, open->op_fname.len); 686 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 687 return status; 688 break; 689 default: 690 goto xdr_error; 691 } 692 693 DECODE_TAIL; 694 } 695 696 static __be32 697 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 698 { 699 DECODE_HEAD; 700 701 open_conf->oc_stateowner = NULL; 702 READ_BUF(4 + sizeof(stateid_t)); 703 READ32(open_conf->oc_req_stateid.si_generation); 704 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 705 READ32(open_conf->oc_seqid); 706 707 DECODE_TAIL; 708 } 709 710 static __be32 711 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 712 { 713 DECODE_HEAD; 714 715 open_down->od_stateowner = NULL; 716 READ_BUF(12 + sizeof(stateid_t)); 717 READ32(open_down->od_stateid.si_generation); 718 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 719 READ32(open_down->od_seqid); 720 READ32(open_down->od_share_access); 721 READ32(open_down->od_share_deny); 722 723 DECODE_TAIL; 724 } 725 726 static __be32 727 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 728 { 729 DECODE_HEAD; 730 731 READ_BUF(4); 732 READ32(putfh->pf_fhlen); 733 if (putfh->pf_fhlen > NFS4_FHSIZE) 734 goto xdr_error; 735 READ_BUF(putfh->pf_fhlen); 736 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 737 738 DECODE_TAIL; 739 } 740 741 static __be32 742 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 743 { 744 DECODE_HEAD; 745 746 READ_BUF(sizeof(stateid_t) + 12); 747 READ32(read->rd_stateid.si_generation); 748 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 749 READ64(read->rd_offset); 750 READ32(read->rd_length); 751 752 DECODE_TAIL; 753 } 754 755 static __be32 756 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 757 { 758 DECODE_HEAD; 759 760 READ_BUF(24); 761 READ64(readdir->rd_cookie); 762 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 763 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 764 READ32(readdir->rd_maxcount); 765 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 766 goto out; 767 768 DECODE_TAIL; 769 } 770 771 static __be32 772 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 773 { 774 DECODE_HEAD; 775 776 READ_BUF(4); 777 READ32(remove->rm_namelen); 778 READ_BUF(remove->rm_namelen); 779 SAVEMEM(remove->rm_name, remove->rm_namelen); 780 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 781 return status; 782 783 DECODE_TAIL; 784 } 785 786 static __be32 787 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 788 { 789 DECODE_HEAD; 790 791 READ_BUF(4); 792 READ32(rename->rn_snamelen); 793 READ_BUF(rename->rn_snamelen + 4); 794 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 795 READ32(rename->rn_tnamelen); 796 READ_BUF(rename->rn_tnamelen); 797 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 798 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 799 return status; 800 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 801 return status; 802 803 DECODE_TAIL; 804 } 805 806 static __be32 807 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 808 { 809 DECODE_HEAD; 810 811 READ_BUF(sizeof(clientid_t)); 812 COPYMEM(clientid, sizeof(clientid_t)); 813 814 DECODE_TAIL; 815 } 816 817 static __be32 818 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 819 struct nfsd4_secinfo *secinfo) 820 { 821 DECODE_HEAD; 822 823 READ_BUF(4); 824 READ32(secinfo->si_namelen); 825 READ_BUF(secinfo->si_namelen); 826 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 827 status = check_filename(secinfo->si_name, secinfo->si_namelen, 828 nfserr_noent); 829 if (status) 830 return status; 831 DECODE_TAIL; 832 } 833 834 static __be32 835 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 836 { 837 DECODE_HEAD; 838 839 READ_BUF(sizeof(stateid_t)); 840 READ32(setattr->sa_stateid.si_generation); 841 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 842 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 843 goto out; 844 845 DECODE_TAIL; 846 } 847 848 static __be32 849 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 850 { 851 DECODE_HEAD; 852 853 READ_BUF(12); 854 COPYMEM(setclientid->se_verf.data, 8); 855 READ32(setclientid->se_namelen); 856 857 READ_BUF(setclientid->se_namelen + 8); 858 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 859 READ32(setclientid->se_callback_prog); 860 READ32(setclientid->se_callback_netid_len); 861 862 READ_BUF(setclientid->se_callback_netid_len + 4); 863 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 864 READ32(setclientid->se_callback_addr_len); 865 866 READ_BUF(setclientid->se_callback_addr_len + 4); 867 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 868 READ32(setclientid->se_callback_ident); 869 870 DECODE_TAIL; 871 } 872 873 static __be32 874 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 875 { 876 DECODE_HEAD; 877 878 READ_BUF(8 + sizeof(nfs4_verifier)); 879 COPYMEM(&scd_c->sc_clientid, 8); 880 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 881 882 DECODE_TAIL; 883 } 884 885 /* Also used for NVERIFY */ 886 static __be32 887 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 888 { 889 #if 0 890 struct nfsd4_compoundargs save = { 891 .p = argp->p, 892 .end = argp->end, 893 .rqstp = argp->rqstp, 894 }; 895 u32 ve_bmval[2]; 896 struct iattr ve_iattr; /* request */ 897 struct nfs4_acl *ve_acl; /* request */ 898 #endif 899 DECODE_HEAD; 900 901 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 902 goto out; 903 904 /* For convenience's sake, we compare raw xdr'd attributes in 905 * nfsd4_proc_verify; however we still decode here just to return 906 * correct error in case of bad xdr. */ 907 #if 0 908 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 909 if (status == nfserr_inval) { 910 status = nfserrno(status); 911 goto out; 912 } 913 #endif 914 READ_BUF(4); 915 READ32(verify->ve_attrlen); 916 READ_BUF(verify->ve_attrlen); 917 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 918 919 DECODE_TAIL; 920 } 921 922 static __be32 923 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 924 { 925 int avail; 926 int v; 927 int len; 928 DECODE_HEAD; 929 930 READ_BUF(sizeof(stateid_opaque_t) + 20); 931 READ32(write->wr_stateid.si_generation); 932 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 933 READ64(write->wr_offset); 934 READ32(write->wr_stable_how); 935 if (write->wr_stable_how > 2) 936 goto xdr_error; 937 READ32(write->wr_buflen); 938 939 /* Sorry .. no magic macros for this.. * 940 * READ_BUF(write->wr_buflen); 941 * SAVEMEM(write->wr_buf, write->wr_buflen); 942 */ 943 avail = (char*)argp->end - (char*)argp->p; 944 if (avail + argp->pagelen < write->wr_buflen) { 945 dprintk("NFSD: xdr error (%s:%d)\n", 946 __FILE__, __LINE__); 947 goto xdr_error; 948 } 949 argp->rqstp->rq_vec[0].iov_base = p; 950 argp->rqstp->rq_vec[0].iov_len = avail; 951 v = 0; 952 len = write->wr_buflen; 953 while (len > argp->rqstp->rq_vec[v].iov_len) { 954 len -= argp->rqstp->rq_vec[v].iov_len; 955 v++; 956 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 957 argp->pagelist++; 958 if (argp->pagelen >= PAGE_SIZE) { 959 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 960 argp->pagelen -= PAGE_SIZE; 961 } else { 962 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 963 argp->pagelen -= len; 964 } 965 } 966 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 967 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 968 argp->rqstp->rq_vec[v].iov_len = len; 969 write->wr_vlen = v+1; 970 971 DECODE_TAIL; 972 } 973 974 static __be32 975 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 976 { 977 DECODE_HEAD; 978 979 READ_BUF(12); 980 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 981 READ32(rlockowner->rl_owner.len); 982 READ_BUF(rlockowner->rl_owner.len); 983 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 984 985 DECODE_TAIL; 986 } 987 988 static __be32 989 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 990 { 991 DECODE_HEAD; 992 struct nfsd4_op *op; 993 int i; 994 995 /* 996 * XXX: According to spec, we should check the tag 997 * for UTF-8 compliance. I'm postponing this for 998 * now because it seems that some clients do use 999 * binary tags. 1000 */ 1001 READ_BUF(4); 1002 READ32(argp->taglen); 1003 READ_BUF(argp->taglen + 8); 1004 SAVEMEM(argp->tag, argp->taglen); 1005 READ32(argp->minorversion); 1006 READ32(argp->opcnt); 1007 1008 if (argp->taglen > NFSD4_MAX_TAGLEN) 1009 goto xdr_error; 1010 if (argp->opcnt > 100) 1011 goto xdr_error; 1012 1013 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1014 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1015 if (!argp->ops) { 1016 argp->ops = argp->iops; 1017 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1018 goto xdr_error; 1019 } 1020 } 1021 1022 for (i = 0; i < argp->opcnt; i++) { 1023 op = &argp->ops[i]; 1024 op->replay = NULL; 1025 1026 /* 1027 * We can't use READ_BUF() here because we need to handle 1028 * a missing opcode as an OP_WRITE + 1. So we need to check 1029 * to see if we're truly at the end of our buffer or if there 1030 * is another page we need to flip to. 1031 */ 1032 1033 if (argp->p == argp->end) { 1034 if (argp->pagelen < 4) { 1035 /* There isn't an opcode still on the wire */ 1036 op->opnum = OP_WRITE + 1; 1037 op->status = nfserr_bad_xdr; 1038 argp->opcnt = i+1; 1039 break; 1040 } 1041 1042 /* 1043 * False alarm. We just hit a page boundary, but there 1044 * is still data available. Move pointer across page 1045 * boundary. *snip from READ_BUF* 1046 */ 1047 argp->p = page_address(argp->pagelist[0]); 1048 argp->pagelist++; 1049 if (argp->pagelen < PAGE_SIZE) { 1050 argp->end = p + (argp->pagelen>>2); 1051 argp->pagelen = 0; 1052 } else { 1053 argp->end = p + (PAGE_SIZE>>2); 1054 argp->pagelen -= PAGE_SIZE; 1055 } 1056 } 1057 op->opnum = ntohl(*argp->p++); 1058 1059 switch (op->opnum) { 1060 case 2: /* Reserved operation */ 1061 op->opnum = OP_ILLEGAL; 1062 if (argp->minorversion == 0) 1063 op->status = nfserr_op_illegal; 1064 else 1065 op->status = nfserr_minor_vers_mismatch; 1066 break; 1067 case OP_ACCESS: 1068 op->status = nfsd4_decode_access(argp, &op->u.access); 1069 break; 1070 case OP_CLOSE: 1071 op->status = nfsd4_decode_close(argp, &op->u.close); 1072 break; 1073 case OP_COMMIT: 1074 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1075 break; 1076 case OP_CREATE: 1077 op->status = nfsd4_decode_create(argp, &op->u.create); 1078 break; 1079 case OP_DELEGRETURN: 1080 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1081 break; 1082 case OP_GETATTR: 1083 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1084 break; 1085 case OP_GETFH: 1086 op->status = nfs_ok; 1087 break; 1088 case OP_LINK: 1089 op->status = nfsd4_decode_link(argp, &op->u.link); 1090 break; 1091 case OP_LOCK: 1092 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1093 break; 1094 case OP_LOCKT: 1095 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1096 break; 1097 case OP_LOCKU: 1098 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1099 break; 1100 case OP_LOOKUP: 1101 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1102 break; 1103 case OP_LOOKUPP: 1104 op->status = nfs_ok; 1105 break; 1106 case OP_NVERIFY: 1107 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1108 break; 1109 case OP_OPEN: 1110 op->status = nfsd4_decode_open(argp, &op->u.open); 1111 break; 1112 case OP_OPEN_CONFIRM: 1113 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1114 break; 1115 case OP_OPEN_DOWNGRADE: 1116 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1117 break; 1118 case OP_PUTFH: 1119 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1120 break; 1121 case OP_PUTROOTFH: 1122 op->status = nfs_ok; 1123 break; 1124 case OP_READ: 1125 op->status = nfsd4_decode_read(argp, &op->u.read); 1126 break; 1127 case OP_READDIR: 1128 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1129 break; 1130 case OP_READLINK: 1131 op->status = nfs_ok; 1132 break; 1133 case OP_REMOVE: 1134 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1135 break; 1136 case OP_RENAME: 1137 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1138 break; 1139 case OP_RESTOREFH: 1140 op->status = nfs_ok; 1141 break; 1142 case OP_RENEW: 1143 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1144 break; 1145 case OP_SAVEFH: 1146 op->status = nfs_ok; 1147 break; 1148 case OP_SECINFO: 1149 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo); 1150 break; 1151 case OP_SETATTR: 1152 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1153 break; 1154 case OP_SETCLIENTID: 1155 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1156 break; 1157 case OP_SETCLIENTID_CONFIRM: 1158 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1159 break; 1160 case OP_VERIFY: 1161 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1162 break; 1163 case OP_WRITE: 1164 op->status = nfsd4_decode_write(argp, &op->u.write); 1165 break; 1166 case OP_RELEASE_LOCKOWNER: 1167 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1168 break; 1169 default: 1170 op->opnum = OP_ILLEGAL; 1171 op->status = nfserr_op_illegal; 1172 break; 1173 } 1174 1175 if (op->status) { 1176 argp->opcnt = i+1; 1177 break; 1178 } 1179 } 1180 1181 DECODE_TAIL; 1182 } 1183 /* 1184 * END OF "GENERIC" DECODE ROUTINES. 1185 */ 1186 1187 /* 1188 * START OF "GENERIC" ENCODE ROUTINES. 1189 * These may look a little ugly since they are imported from a "generic" 1190 * set of XDR encode/decode routines which are intended to be shared by 1191 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1192 * 1193 * If the pain of reading these is too great, it should be a straightforward 1194 * task to translate them into Linux-specific versions which are more 1195 * consistent with the style used in NFSv2/v3... 1196 */ 1197 #define ENCODE_HEAD __be32 *p 1198 1199 #define WRITE32(n) *p++ = htonl(n) 1200 #define WRITE64(n) do { \ 1201 *p++ = htonl((u32)((n) >> 32)); \ 1202 *p++ = htonl((u32)(n)); \ 1203 } while (0) 1204 #define WRITEMEM(ptr,nbytes) do { \ 1205 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1206 memcpy(p, ptr, nbytes); \ 1207 p += XDR_QUADLEN(nbytes); \ 1208 } while (0) 1209 #define WRITECINFO(c) do { \ 1210 *p++ = htonl(c.atomic); \ 1211 *p++ = htonl(c.before_ctime_sec); \ 1212 *p++ = htonl(c.before_ctime_nsec); \ 1213 *p++ = htonl(c.after_ctime_sec); \ 1214 *p++ = htonl(c.after_ctime_nsec); \ 1215 } while (0) 1216 1217 #define RESERVE_SPACE(nbytes) do { \ 1218 p = resp->p; \ 1219 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1220 } while (0) 1221 #define ADJUST_ARGS() resp->p = p 1222 1223 /* 1224 * Header routine to setup seqid operation replay cache 1225 */ 1226 #define ENCODE_SEQID_OP_HEAD \ 1227 __be32 *p; \ 1228 __be32 *save; \ 1229 \ 1230 save = resp->p; 1231 1232 /* 1233 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1234 * is where sequence id's are incremented, and the replay cache is filled. 1235 * Note that we increment sequence id's here, at the last moment, so we're sure 1236 * we know whether the error to be returned is a sequence id mutating error. 1237 */ 1238 1239 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1240 if (seqid_mutating_err(nfserr) && stateowner) { \ 1241 stateowner->so_seqid++; \ 1242 stateowner->so_replay.rp_status = nfserr; \ 1243 stateowner->so_replay.rp_buflen = \ 1244 (((char *)(resp)->p - (char *)save)); \ 1245 memcpy(stateowner->so_replay.rp_buf, save, \ 1246 stateowner->so_replay.rp_buflen); \ 1247 } } while (0); 1248 1249 /* Encode as an array of strings the string given with components 1250 * seperated @sep. 1251 */ 1252 static __be32 nfsd4_encode_components(char sep, char *components, 1253 __be32 **pp, int *buflen) 1254 { 1255 __be32 *p = *pp; 1256 __be32 *countp = p; 1257 int strlen, count=0; 1258 char *str, *end; 1259 1260 dprintk("nfsd4_encode_components(%s)\n", components); 1261 if ((*buflen -= 4) < 0) 1262 return nfserr_resource; 1263 WRITE32(0); /* We will fill this in with @count later */ 1264 end = str = components; 1265 while (*end) { 1266 for (; *end && (*end != sep); end++) 1267 ; /* Point to end of component */ 1268 strlen = end - str; 1269 if (strlen) { 1270 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1271 return nfserr_resource; 1272 WRITE32(strlen); 1273 WRITEMEM(str, strlen); 1274 count++; 1275 } 1276 else 1277 end++; 1278 str = end; 1279 } 1280 *pp = p; 1281 p = countp; 1282 WRITE32(count); 1283 return 0; 1284 } 1285 1286 /* 1287 * encode a location element of a fs_locations structure 1288 */ 1289 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1290 __be32 **pp, int *buflen) 1291 { 1292 __be32 status; 1293 __be32 *p = *pp; 1294 1295 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1296 if (status) 1297 return status; 1298 status = nfsd4_encode_components('/', location->path, &p, buflen); 1299 if (status) 1300 return status; 1301 *pp = p; 1302 return 0; 1303 } 1304 1305 /* 1306 * Return the path to an export point in the pseudo filesystem namespace 1307 * Returned string is safe to use as long as the caller holds a reference 1308 * to @exp. 1309 */ 1310 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1311 { 1312 struct svc_fh tmp_fh; 1313 char *path, *rootpath; 1314 1315 fh_init(&tmp_fh, NFS4_FHSIZE); 1316 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1317 if (*stat) 1318 return NULL; 1319 rootpath = tmp_fh.fh_export->ex_pathname; 1320 1321 path = exp->ex_pathname; 1322 1323 if (strncmp(path, rootpath, strlen(rootpath))) { 1324 dprintk("nfsd: fs_locations failed;" 1325 "%s is not contained in %s\n", path, rootpath); 1326 *stat = nfserr_notsupp; 1327 return NULL; 1328 } 1329 1330 return path + strlen(rootpath); 1331 } 1332 1333 /* 1334 * encode a fs_locations structure 1335 */ 1336 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1337 struct svc_export *exp, 1338 __be32 **pp, int *buflen) 1339 { 1340 __be32 status; 1341 int i; 1342 __be32 *p = *pp; 1343 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1344 char *root = nfsd4_path(rqstp, exp, &status); 1345 1346 if (status) 1347 return status; 1348 status = nfsd4_encode_components('/', root, &p, buflen); 1349 if (status) 1350 return status; 1351 if ((*buflen -= 4) < 0) 1352 return nfserr_resource; 1353 WRITE32(fslocs->locations_count); 1354 for (i=0; i<fslocs->locations_count; i++) { 1355 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1356 &p, buflen); 1357 if (status) 1358 return status; 1359 } 1360 *pp = p; 1361 return 0; 1362 } 1363 1364 static u32 nfs4_ftypes[16] = { 1365 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1366 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1367 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1368 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1369 }; 1370 1371 static __be32 1372 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1373 __be32 **p, int *buflen) 1374 { 1375 int status; 1376 1377 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1378 return nfserr_resource; 1379 if (whotype != NFS4_ACL_WHO_NAMED) 1380 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1381 else if (group) 1382 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1383 else 1384 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1385 if (status < 0) 1386 return nfserrno(status); 1387 *p = xdr_encode_opaque(*p, NULL, status); 1388 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1389 BUG_ON(*buflen < 0); 1390 return 0; 1391 } 1392 1393 static inline __be32 1394 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1395 { 1396 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1397 } 1398 1399 static inline __be32 1400 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1401 { 1402 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1403 } 1404 1405 static inline __be32 1406 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1407 __be32 **p, int *buflen) 1408 { 1409 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1410 } 1411 1412 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1413 FATTR4_WORD0_RDATTR_ERROR) 1414 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1415 1416 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1417 { 1418 /* As per referral draft: */ 1419 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1420 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1421 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1422 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1423 *rdattr_err = NFSERR_MOVED; 1424 else 1425 return nfserr_moved; 1426 } 1427 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1428 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1429 return 0; 1430 } 1431 1432 /* 1433 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1434 * ourselves. 1435 * 1436 * @countp is the buffer size in _words_; upon successful return this becomes 1437 * replaced with the number of words written. 1438 */ 1439 __be32 1440 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1441 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1442 struct svc_rqst *rqstp, int ignore_crossmnt) 1443 { 1444 u32 bmval0 = bmval[0]; 1445 u32 bmval1 = bmval[1]; 1446 struct kstat stat; 1447 struct svc_fh tempfh; 1448 struct kstatfs statfs; 1449 int buflen = *countp << 2; 1450 __be32 *attrlenp; 1451 u32 dummy; 1452 u64 dummy64; 1453 u32 rdattr_err = 0; 1454 __be32 *p = buffer; 1455 __be32 status; 1456 int err; 1457 int aclsupport = 0; 1458 struct nfs4_acl *acl = NULL; 1459 1460 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1461 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1462 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1463 1464 if (exp->ex_fslocs.migrated) { 1465 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1466 if (status) 1467 goto out; 1468 } 1469 1470 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1471 if (err) 1472 goto out_nfserr; 1473 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1474 FATTR4_WORD0_MAXNAME)) || 1475 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1476 FATTR4_WORD1_SPACE_TOTAL))) { 1477 err = vfs_statfs(dentry, &statfs); 1478 if (err) 1479 goto out_nfserr; 1480 } 1481 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1482 fh_init(&tempfh, NFS4_FHSIZE); 1483 status = fh_compose(&tempfh, exp, dentry, NULL); 1484 if (status) 1485 goto out; 1486 fhp = &tempfh; 1487 } 1488 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1489 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1490 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1491 aclsupport = (err == 0); 1492 if (bmval0 & FATTR4_WORD0_ACL) { 1493 if (err == -EOPNOTSUPP) 1494 bmval0 &= ~FATTR4_WORD0_ACL; 1495 else if (err == -EINVAL) { 1496 status = nfserr_attrnotsupp; 1497 goto out; 1498 } else if (err != 0) 1499 goto out_nfserr; 1500 } 1501 } 1502 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1503 if (exp->ex_fslocs.locations == NULL) { 1504 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1505 } 1506 } 1507 if ((buflen -= 16) < 0) 1508 goto out_resource; 1509 1510 WRITE32(2); 1511 WRITE32(bmval0); 1512 WRITE32(bmval1); 1513 attrlenp = p++; /* to be backfilled later */ 1514 1515 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1516 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1517 if ((buflen -= 12) < 0) 1518 goto out_resource; 1519 if (!aclsupport) 1520 word0 &= ~FATTR4_WORD0_ACL; 1521 if (!exp->ex_fslocs.locations) 1522 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1523 WRITE32(2); 1524 WRITE32(word0); 1525 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1526 } 1527 if (bmval0 & FATTR4_WORD0_TYPE) { 1528 if ((buflen -= 4) < 0) 1529 goto out_resource; 1530 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1531 if (dummy == NF4BAD) 1532 goto out_serverfault; 1533 WRITE32(dummy); 1534 } 1535 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1536 if ((buflen -= 4) < 0) 1537 goto out_resource; 1538 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1539 WRITE32(NFS4_FH_PERSISTENT); 1540 else 1541 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1542 } 1543 if (bmval0 & FATTR4_WORD0_CHANGE) { 1544 /* 1545 * Note: This _must_ be consistent with the scheme for writing 1546 * change_info, so any changes made here must be reflected there 1547 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1548 * macro above.) 1549 */ 1550 if ((buflen -= 8) < 0) 1551 goto out_resource; 1552 WRITE32(stat.ctime.tv_sec); 1553 WRITE32(stat.ctime.tv_nsec); 1554 } 1555 if (bmval0 & FATTR4_WORD0_SIZE) { 1556 if ((buflen -= 8) < 0) 1557 goto out_resource; 1558 WRITE64(stat.size); 1559 } 1560 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1561 if ((buflen -= 4) < 0) 1562 goto out_resource; 1563 WRITE32(1); 1564 } 1565 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1566 if ((buflen -= 4) < 0) 1567 goto out_resource; 1568 WRITE32(1); 1569 } 1570 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1571 if ((buflen -= 4) < 0) 1572 goto out_resource; 1573 WRITE32(0); 1574 } 1575 if (bmval0 & FATTR4_WORD0_FSID) { 1576 if ((buflen -= 16) < 0) 1577 goto out_resource; 1578 if (exp->ex_fslocs.migrated) { 1579 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1580 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1581 } else switch(fsid_source(fhp)) { 1582 case FSIDSOURCE_FSID: 1583 WRITE64((u64)exp->ex_fsid); 1584 WRITE64((u64)0); 1585 break; 1586 case FSIDSOURCE_DEV: 1587 WRITE32(0); 1588 WRITE32(MAJOR(stat.dev)); 1589 WRITE32(0); 1590 WRITE32(MINOR(stat.dev)); 1591 break; 1592 case FSIDSOURCE_UUID: 1593 WRITEMEM(exp->ex_uuid, 16); 1594 break; 1595 } 1596 } 1597 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1598 if ((buflen -= 4) < 0) 1599 goto out_resource; 1600 WRITE32(0); 1601 } 1602 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1603 if ((buflen -= 4) < 0) 1604 goto out_resource; 1605 WRITE32(NFSD_LEASE_TIME); 1606 } 1607 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1608 if ((buflen -= 4) < 0) 1609 goto out_resource; 1610 WRITE32(rdattr_err); 1611 } 1612 if (bmval0 & FATTR4_WORD0_ACL) { 1613 struct nfs4_ace *ace; 1614 1615 if (acl == NULL) { 1616 if ((buflen -= 4) < 0) 1617 goto out_resource; 1618 1619 WRITE32(0); 1620 goto out_acl; 1621 } 1622 if ((buflen -= 4) < 0) 1623 goto out_resource; 1624 WRITE32(acl->naces); 1625 1626 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1627 if ((buflen -= 4*3) < 0) 1628 goto out_resource; 1629 WRITE32(ace->type); 1630 WRITE32(ace->flag); 1631 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1632 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1633 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1634 &p, &buflen); 1635 if (status == nfserr_resource) 1636 goto out_resource; 1637 if (status) 1638 goto out; 1639 } 1640 } 1641 out_acl: 1642 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1643 if ((buflen -= 4) < 0) 1644 goto out_resource; 1645 WRITE32(aclsupport ? 1646 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1647 } 1648 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1649 if ((buflen -= 4) < 0) 1650 goto out_resource; 1651 WRITE32(1); 1652 } 1653 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1654 if ((buflen -= 4) < 0) 1655 goto out_resource; 1656 WRITE32(1); 1657 } 1658 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1659 if ((buflen -= 4) < 0) 1660 goto out_resource; 1661 WRITE32(1); 1662 } 1663 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1664 if ((buflen -= 4) < 0) 1665 goto out_resource; 1666 WRITE32(1); 1667 } 1668 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1669 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1670 if (buflen < 0) 1671 goto out_resource; 1672 WRITE32(fhp->fh_handle.fh_size); 1673 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1674 } 1675 if (bmval0 & FATTR4_WORD0_FILEID) { 1676 if ((buflen -= 8) < 0) 1677 goto out_resource; 1678 WRITE64(stat.ino); 1679 } 1680 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1681 if ((buflen -= 8) < 0) 1682 goto out_resource; 1683 WRITE64((u64) statfs.f_ffree); 1684 } 1685 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1686 if ((buflen -= 8) < 0) 1687 goto out_resource; 1688 WRITE64((u64) statfs.f_ffree); 1689 } 1690 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1691 if ((buflen -= 8) < 0) 1692 goto out_resource; 1693 WRITE64((u64) statfs.f_files); 1694 } 1695 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1696 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1697 if (status == nfserr_resource) 1698 goto out_resource; 1699 if (status) 1700 goto out; 1701 } 1702 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1703 if ((buflen -= 4) < 0) 1704 goto out_resource; 1705 WRITE32(1); 1706 } 1707 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1708 if ((buflen -= 8) < 0) 1709 goto out_resource; 1710 WRITE64(~(u64)0); 1711 } 1712 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1713 if ((buflen -= 4) < 0) 1714 goto out_resource; 1715 WRITE32(255); 1716 } 1717 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1718 if ((buflen -= 4) < 0) 1719 goto out_resource; 1720 WRITE32(statfs.f_namelen); 1721 } 1722 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1723 if ((buflen -= 8) < 0) 1724 goto out_resource; 1725 WRITE64((u64) svc_max_payload(rqstp)); 1726 } 1727 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1728 if ((buflen -= 8) < 0) 1729 goto out_resource; 1730 WRITE64((u64) svc_max_payload(rqstp)); 1731 } 1732 if (bmval1 & FATTR4_WORD1_MODE) { 1733 if ((buflen -= 4) < 0) 1734 goto out_resource; 1735 WRITE32(stat.mode & S_IALLUGO); 1736 } 1737 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1738 if ((buflen -= 4) < 0) 1739 goto out_resource; 1740 WRITE32(1); 1741 } 1742 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1743 if ((buflen -= 4) < 0) 1744 goto out_resource; 1745 WRITE32(stat.nlink); 1746 } 1747 if (bmval1 & FATTR4_WORD1_OWNER) { 1748 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1749 if (status == nfserr_resource) 1750 goto out_resource; 1751 if (status) 1752 goto out; 1753 } 1754 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1755 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1756 if (status == nfserr_resource) 1757 goto out_resource; 1758 if (status) 1759 goto out; 1760 } 1761 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1762 if ((buflen -= 8) < 0) 1763 goto out_resource; 1764 WRITE32((u32) MAJOR(stat.rdev)); 1765 WRITE32((u32) MINOR(stat.rdev)); 1766 } 1767 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1768 if ((buflen -= 8) < 0) 1769 goto out_resource; 1770 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1771 WRITE64(dummy64); 1772 } 1773 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1774 if ((buflen -= 8) < 0) 1775 goto out_resource; 1776 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1777 WRITE64(dummy64); 1778 } 1779 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1780 if ((buflen -= 8) < 0) 1781 goto out_resource; 1782 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1783 WRITE64(dummy64); 1784 } 1785 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1786 if ((buflen -= 8) < 0) 1787 goto out_resource; 1788 dummy64 = (u64)stat.blocks << 9; 1789 WRITE64(dummy64); 1790 } 1791 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1792 if ((buflen -= 12) < 0) 1793 goto out_resource; 1794 WRITE32(0); 1795 WRITE32(stat.atime.tv_sec); 1796 WRITE32(stat.atime.tv_nsec); 1797 } 1798 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1799 if ((buflen -= 12) < 0) 1800 goto out_resource; 1801 WRITE32(0); 1802 WRITE32(1); 1803 WRITE32(0); 1804 } 1805 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1806 if ((buflen -= 12) < 0) 1807 goto out_resource; 1808 WRITE32(0); 1809 WRITE32(stat.ctime.tv_sec); 1810 WRITE32(stat.ctime.tv_nsec); 1811 } 1812 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1813 if ((buflen -= 12) < 0) 1814 goto out_resource; 1815 WRITE32(0); 1816 WRITE32(stat.mtime.tv_sec); 1817 WRITE32(stat.mtime.tv_nsec); 1818 } 1819 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1820 if ((buflen -= 8) < 0) 1821 goto out_resource; 1822 /* 1823 * Get parent's attributes if not ignoring crossmount 1824 * and this is the root of a cross-mounted filesystem. 1825 */ 1826 if (ignore_crossmnt == 0 && 1827 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { 1828 err = vfs_getattr(exp->ex_path.mnt->mnt_parent, 1829 exp->ex_path.mnt->mnt_mountpoint, &stat); 1830 if (err) 1831 goto out_nfserr; 1832 } 1833 WRITE64(stat.ino); 1834 } 1835 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1836 *countp = p - buffer; 1837 status = nfs_ok; 1838 1839 out: 1840 kfree(acl); 1841 if (fhp == &tempfh) 1842 fh_put(&tempfh); 1843 return status; 1844 out_nfserr: 1845 status = nfserrno(err); 1846 goto out; 1847 out_resource: 1848 *countp = 0; 1849 status = nfserr_resource; 1850 goto out; 1851 out_serverfault: 1852 status = nfserr_serverfault; 1853 goto out; 1854 } 1855 1856 static inline int attributes_need_mount(u32 *bmval) 1857 { 1858 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 1859 return 1; 1860 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 1861 return 1; 1862 return 0; 1863 } 1864 1865 static __be32 1866 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1867 const char *name, int namlen, __be32 *p, int *buflen) 1868 { 1869 struct svc_export *exp = cd->rd_fhp->fh_export; 1870 struct dentry *dentry; 1871 __be32 nfserr; 1872 int ignore_crossmnt = 0; 1873 1874 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1875 if (IS_ERR(dentry)) 1876 return nfserrno(PTR_ERR(dentry)); 1877 1878 exp_get(exp); 1879 /* 1880 * In the case of a mountpoint, the client may be asking for 1881 * attributes that are only properties of the underlying filesystem 1882 * as opposed to the cross-mounted file system. In such a case, 1883 * we will not follow the cross mount and will fill the attribtutes 1884 * directly from the mountpoint dentry. 1885 */ 1886 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval)) 1887 ignore_crossmnt = 1; 1888 else if (d_mountpoint(dentry)) { 1889 int err; 1890 1891 /* 1892 * Why the heck aren't we just using nfsd_lookup?? 1893 * Different "."/".." handling? Something else? 1894 * At least, add a comment here to explain.... 1895 */ 1896 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1897 if (err) { 1898 nfserr = nfserrno(err); 1899 goto out_put; 1900 } 1901 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 1902 if (nfserr) 1903 goto out_put; 1904 1905 } 1906 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1907 cd->rd_rqstp, ignore_crossmnt); 1908 out_put: 1909 dput(dentry); 1910 exp_put(exp); 1911 return nfserr; 1912 } 1913 1914 static __be32 * 1915 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1916 { 1917 __be32 *attrlenp; 1918 1919 if (buflen < 6) 1920 return NULL; 1921 *p++ = htonl(2); 1922 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1923 *p++ = htonl(0); /* bmval1 */ 1924 1925 attrlenp = p++; 1926 *p++ = nfserr; /* no htonl */ 1927 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1928 return p; 1929 } 1930 1931 static int 1932 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1933 loff_t offset, u64 ino, unsigned int d_type) 1934 { 1935 struct readdir_cd *ccd = ccdv; 1936 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1937 int buflen; 1938 __be32 *p = cd->buffer; 1939 __be32 nfserr = nfserr_toosmall; 1940 1941 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1942 if (name && isdotent(name, namlen)) { 1943 cd->common.err = nfs_ok; 1944 return 0; 1945 } 1946 1947 if (cd->offset) 1948 xdr_encode_hyper(cd->offset, (u64) offset); 1949 1950 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1951 if (buflen < 0) 1952 goto fail; 1953 1954 *p++ = xdr_one; /* mark entry present */ 1955 cd->offset = p; /* remember pointer */ 1956 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1957 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1958 1959 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1960 switch (nfserr) { 1961 case nfs_ok: 1962 p += buflen; 1963 break; 1964 case nfserr_resource: 1965 nfserr = nfserr_toosmall; 1966 goto fail; 1967 case nfserr_dropit: 1968 goto fail; 1969 default: 1970 /* 1971 * If the client requested the RDATTR_ERROR attribute, 1972 * we stuff the error code into this attribute 1973 * and continue. If this attribute was not requested, 1974 * then in accordance with the spec, we fail the 1975 * entire READDIR operation(!) 1976 */ 1977 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1978 goto fail; 1979 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1980 if (p == NULL) { 1981 nfserr = nfserr_toosmall; 1982 goto fail; 1983 } 1984 } 1985 cd->buflen -= (p - cd->buffer); 1986 cd->buffer = p; 1987 cd->common.err = nfs_ok; 1988 return 0; 1989 fail: 1990 cd->common.err = nfserr; 1991 return -EINVAL; 1992 } 1993 1994 static void 1995 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1996 { 1997 ENCODE_HEAD; 1998 1999 if (!nfserr) { 2000 RESERVE_SPACE(8); 2001 WRITE32(access->ac_supported); 2002 WRITE32(access->ac_resp_access); 2003 ADJUST_ARGS(); 2004 } 2005 } 2006 2007 static void 2008 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2009 { 2010 ENCODE_SEQID_OP_HEAD; 2011 2012 if (!nfserr) { 2013 RESERVE_SPACE(sizeof(stateid_t)); 2014 WRITE32(close->cl_stateid.si_generation); 2015 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 2016 ADJUST_ARGS(); 2017 } 2018 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2019 } 2020 2021 2022 static void 2023 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2024 { 2025 ENCODE_HEAD; 2026 2027 if (!nfserr) { 2028 RESERVE_SPACE(8); 2029 WRITEMEM(commit->co_verf.data, 8); 2030 ADJUST_ARGS(); 2031 } 2032 } 2033 2034 static void 2035 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2036 { 2037 ENCODE_HEAD; 2038 2039 if (!nfserr) { 2040 RESERVE_SPACE(32); 2041 WRITECINFO(create->cr_cinfo); 2042 WRITE32(2); 2043 WRITE32(create->cr_bmval[0]); 2044 WRITE32(create->cr_bmval[1]); 2045 ADJUST_ARGS(); 2046 } 2047 } 2048 2049 static __be32 2050 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2051 { 2052 struct svc_fh *fhp = getattr->ga_fhp; 2053 int buflen; 2054 2055 if (nfserr) 2056 return nfserr; 2057 2058 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2059 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2060 resp->p, &buflen, getattr->ga_bmval, 2061 resp->rqstp, 0); 2062 if (!nfserr) 2063 resp->p += buflen; 2064 return nfserr; 2065 } 2066 2067 static void 2068 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2069 { 2070 unsigned int len; 2071 ENCODE_HEAD; 2072 2073 if (!nfserr) { 2074 len = fhp->fh_handle.fh_size; 2075 RESERVE_SPACE(len + 4); 2076 WRITE32(len); 2077 WRITEMEM(&fhp->fh_handle.fh_base, len); 2078 ADJUST_ARGS(); 2079 } 2080 } 2081 2082 /* 2083 * Including all fields other than the name, a LOCK4denied structure requires 2084 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2085 */ 2086 static void 2087 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2088 { 2089 ENCODE_HEAD; 2090 2091 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2092 WRITE64(ld->ld_start); 2093 WRITE64(ld->ld_length); 2094 WRITE32(ld->ld_type); 2095 if (ld->ld_sop) { 2096 WRITEMEM(&ld->ld_clientid, 8); 2097 WRITE32(ld->ld_sop->so_owner.len); 2098 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2099 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2100 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2101 WRITE64((u64)0); /* clientid */ 2102 WRITE32(0); /* length of owner name */ 2103 } 2104 ADJUST_ARGS(); 2105 } 2106 2107 static void 2108 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2109 { 2110 ENCODE_SEQID_OP_HEAD; 2111 2112 if (!nfserr) { 2113 RESERVE_SPACE(4 + sizeof(stateid_t)); 2114 WRITE32(lock->lk_resp_stateid.si_generation); 2115 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2116 ADJUST_ARGS(); 2117 } else if (nfserr == nfserr_denied) 2118 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2119 2120 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2121 } 2122 2123 static void 2124 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2125 { 2126 if (nfserr == nfserr_denied) 2127 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2128 } 2129 2130 static void 2131 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2132 { 2133 ENCODE_SEQID_OP_HEAD; 2134 2135 if (!nfserr) { 2136 RESERVE_SPACE(sizeof(stateid_t)); 2137 WRITE32(locku->lu_stateid.si_generation); 2138 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2139 ADJUST_ARGS(); 2140 } 2141 2142 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2143 } 2144 2145 2146 static void 2147 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2148 { 2149 ENCODE_HEAD; 2150 2151 if (!nfserr) { 2152 RESERVE_SPACE(20); 2153 WRITECINFO(link->li_cinfo); 2154 ADJUST_ARGS(); 2155 } 2156 } 2157 2158 2159 static void 2160 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2161 { 2162 ENCODE_SEQID_OP_HEAD; 2163 2164 if (nfserr) 2165 goto out; 2166 2167 RESERVE_SPACE(36 + sizeof(stateid_t)); 2168 WRITE32(open->op_stateid.si_generation); 2169 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2170 WRITECINFO(open->op_cinfo); 2171 WRITE32(open->op_rflags); 2172 WRITE32(2); 2173 WRITE32(open->op_bmval[0]); 2174 WRITE32(open->op_bmval[1]); 2175 WRITE32(open->op_delegate_type); 2176 ADJUST_ARGS(); 2177 2178 switch (open->op_delegate_type) { 2179 case NFS4_OPEN_DELEGATE_NONE: 2180 break; 2181 case NFS4_OPEN_DELEGATE_READ: 2182 RESERVE_SPACE(20 + sizeof(stateid_t)); 2183 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2184 WRITE32(open->op_recall); 2185 2186 /* 2187 * TODO: ACE's in delegations 2188 */ 2189 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2190 WRITE32(0); 2191 WRITE32(0); 2192 WRITE32(0); /* XXX: is NULL principal ok? */ 2193 ADJUST_ARGS(); 2194 break; 2195 case NFS4_OPEN_DELEGATE_WRITE: 2196 RESERVE_SPACE(32 + sizeof(stateid_t)); 2197 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2198 WRITE32(0); 2199 2200 /* 2201 * TODO: space_limit's in delegations 2202 */ 2203 WRITE32(NFS4_LIMIT_SIZE); 2204 WRITE32(~(u32)0); 2205 WRITE32(~(u32)0); 2206 2207 /* 2208 * TODO: ACE's in delegations 2209 */ 2210 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2211 WRITE32(0); 2212 WRITE32(0); 2213 WRITE32(0); /* XXX: is NULL principal ok? */ 2214 ADJUST_ARGS(); 2215 break; 2216 default: 2217 BUG(); 2218 } 2219 /* XXX save filehandle here */ 2220 out: 2221 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2222 } 2223 2224 static void 2225 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2226 { 2227 ENCODE_SEQID_OP_HEAD; 2228 2229 if (!nfserr) { 2230 RESERVE_SPACE(sizeof(stateid_t)); 2231 WRITE32(oc->oc_resp_stateid.si_generation); 2232 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2233 ADJUST_ARGS(); 2234 } 2235 2236 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2237 } 2238 2239 static void 2240 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2241 { 2242 ENCODE_SEQID_OP_HEAD; 2243 2244 if (!nfserr) { 2245 RESERVE_SPACE(sizeof(stateid_t)); 2246 WRITE32(od->od_stateid.si_generation); 2247 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2248 ADJUST_ARGS(); 2249 } 2250 2251 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2252 } 2253 2254 static __be32 2255 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2256 struct nfsd4_read *read) 2257 { 2258 u32 eof; 2259 int v, pn; 2260 unsigned long maxcount; 2261 long len; 2262 ENCODE_HEAD; 2263 2264 if (nfserr) 2265 return nfserr; 2266 if (resp->xbuf->page_len) 2267 return nfserr_resource; 2268 2269 RESERVE_SPACE(8); /* eof flag and byte count */ 2270 2271 maxcount = svc_max_payload(resp->rqstp); 2272 if (maxcount > read->rd_length) 2273 maxcount = read->rd_length; 2274 2275 len = maxcount; 2276 v = 0; 2277 while (len > 0) { 2278 pn = resp->rqstp->rq_resused++; 2279 resp->rqstp->rq_vec[v].iov_base = 2280 page_address(resp->rqstp->rq_respages[pn]); 2281 resp->rqstp->rq_vec[v].iov_len = 2282 len < PAGE_SIZE ? len : PAGE_SIZE; 2283 v++; 2284 len -= PAGE_SIZE; 2285 } 2286 read->rd_vlen = v; 2287 2288 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2289 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2290 &maxcount); 2291 2292 if (nfserr == nfserr_symlink) 2293 nfserr = nfserr_inval; 2294 if (nfserr) 2295 return nfserr; 2296 eof = (read->rd_offset + maxcount >= 2297 read->rd_fhp->fh_dentry->d_inode->i_size); 2298 2299 WRITE32(eof); 2300 WRITE32(maxcount); 2301 ADJUST_ARGS(); 2302 resp->xbuf->head[0].iov_len = (char*)p 2303 - (char*)resp->xbuf->head[0].iov_base; 2304 resp->xbuf->page_len = maxcount; 2305 2306 /* Use rest of head for padding and remaining ops: */ 2307 resp->xbuf->tail[0].iov_base = p; 2308 resp->xbuf->tail[0].iov_len = 0; 2309 if (maxcount&3) { 2310 RESERVE_SPACE(4); 2311 WRITE32(0); 2312 resp->xbuf->tail[0].iov_base += maxcount&3; 2313 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2314 ADJUST_ARGS(); 2315 } 2316 return 0; 2317 } 2318 2319 static __be32 2320 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2321 { 2322 int maxcount; 2323 char *page; 2324 ENCODE_HEAD; 2325 2326 if (nfserr) 2327 return nfserr; 2328 if (resp->xbuf->page_len) 2329 return nfserr_resource; 2330 2331 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2332 2333 maxcount = PAGE_SIZE; 2334 RESERVE_SPACE(4); 2335 2336 /* 2337 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2338 * if they would overflow the buffer. Is this kosher in NFSv4? If 2339 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2340 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2341 */ 2342 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2343 if (nfserr == nfserr_isdir) 2344 return nfserr_inval; 2345 if (nfserr) 2346 return nfserr; 2347 2348 WRITE32(maxcount); 2349 ADJUST_ARGS(); 2350 resp->xbuf->head[0].iov_len = (char*)p 2351 - (char*)resp->xbuf->head[0].iov_base; 2352 resp->xbuf->page_len = maxcount; 2353 2354 /* Use rest of head for padding and remaining ops: */ 2355 resp->xbuf->tail[0].iov_base = p; 2356 resp->xbuf->tail[0].iov_len = 0; 2357 if (maxcount&3) { 2358 RESERVE_SPACE(4); 2359 WRITE32(0); 2360 resp->xbuf->tail[0].iov_base += maxcount&3; 2361 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2362 ADJUST_ARGS(); 2363 } 2364 return 0; 2365 } 2366 2367 static __be32 2368 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2369 { 2370 int maxcount; 2371 loff_t offset; 2372 __be32 *page, *savep, *tailbase; 2373 ENCODE_HEAD; 2374 2375 if (nfserr) 2376 return nfserr; 2377 if (resp->xbuf->page_len) 2378 return nfserr_resource; 2379 2380 RESERVE_SPACE(8); /* verifier */ 2381 savep = p; 2382 2383 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2384 WRITE32(0); 2385 WRITE32(0); 2386 ADJUST_ARGS(); 2387 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2388 tailbase = p; 2389 2390 maxcount = PAGE_SIZE; 2391 if (maxcount > readdir->rd_maxcount) 2392 maxcount = readdir->rd_maxcount; 2393 2394 /* 2395 * Convert from bytes to words, account for the two words already 2396 * written, make sure to leave two words at the end for the next 2397 * pointer and eof field. 2398 */ 2399 maxcount = (maxcount >> 2) - 4; 2400 if (maxcount < 0) { 2401 nfserr = nfserr_toosmall; 2402 goto err_no_verf; 2403 } 2404 2405 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2406 readdir->common.err = 0; 2407 readdir->buflen = maxcount; 2408 readdir->buffer = page; 2409 readdir->offset = NULL; 2410 2411 offset = readdir->rd_cookie; 2412 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2413 &offset, 2414 &readdir->common, nfsd4_encode_dirent); 2415 if (nfserr == nfs_ok && 2416 readdir->common.err == nfserr_toosmall && 2417 readdir->buffer == page) 2418 nfserr = nfserr_toosmall; 2419 if (nfserr == nfserr_symlink) 2420 nfserr = nfserr_notdir; 2421 if (nfserr) 2422 goto err_no_verf; 2423 2424 if (readdir->offset) 2425 xdr_encode_hyper(readdir->offset, offset); 2426 2427 p = readdir->buffer; 2428 *p++ = 0; /* no more entries */ 2429 *p++ = htonl(readdir->common.err == nfserr_eof); 2430 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2431 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2432 2433 /* Use rest of head for padding and remaining ops: */ 2434 resp->xbuf->tail[0].iov_base = tailbase; 2435 resp->xbuf->tail[0].iov_len = 0; 2436 resp->p = resp->xbuf->tail[0].iov_base; 2437 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2438 2439 return 0; 2440 err_no_verf: 2441 p = savep; 2442 ADJUST_ARGS(); 2443 return nfserr; 2444 } 2445 2446 static void 2447 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2448 { 2449 ENCODE_HEAD; 2450 2451 if (!nfserr) { 2452 RESERVE_SPACE(20); 2453 WRITECINFO(remove->rm_cinfo); 2454 ADJUST_ARGS(); 2455 } 2456 } 2457 2458 static void 2459 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2460 { 2461 ENCODE_HEAD; 2462 2463 if (!nfserr) { 2464 RESERVE_SPACE(40); 2465 WRITECINFO(rename->rn_sinfo); 2466 WRITECINFO(rename->rn_tinfo); 2467 ADJUST_ARGS(); 2468 } 2469 } 2470 2471 static void 2472 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2473 struct nfsd4_secinfo *secinfo) 2474 { 2475 int i = 0; 2476 struct svc_export *exp = secinfo->si_exp; 2477 u32 nflavs; 2478 struct exp_flavor_info *flavs; 2479 struct exp_flavor_info def_flavs[2]; 2480 ENCODE_HEAD; 2481 2482 if (nfserr) 2483 goto out; 2484 if (exp->ex_nflavors) { 2485 flavs = exp->ex_flavors; 2486 nflavs = exp->ex_nflavors; 2487 } else { /* Handling of some defaults in absence of real secinfo: */ 2488 flavs = def_flavs; 2489 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2490 nflavs = 2; 2491 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2492 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2493 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2494 nflavs = 1; 2495 flavs[0].pseudoflavor 2496 = svcauth_gss_flavor(exp->ex_client); 2497 } else { 2498 nflavs = 1; 2499 flavs[0].pseudoflavor 2500 = exp->ex_client->flavour->flavour; 2501 } 2502 } 2503 2504 RESERVE_SPACE(4); 2505 WRITE32(nflavs); 2506 ADJUST_ARGS(); 2507 for (i = 0; i < nflavs; i++) { 2508 u32 flav = flavs[i].pseudoflavor; 2509 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2510 2511 if (gm) { 2512 RESERVE_SPACE(4); 2513 WRITE32(RPC_AUTH_GSS); 2514 ADJUST_ARGS(); 2515 RESERVE_SPACE(4 + gm->gm_oid.len); 2516 WRITE32(gm->gm_oid.len); 2517 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2518 ADJUST_ARGS(); 2519 RESERVE_SPACE(4); 2520 WRITE32(0); /* qop */ 2521 ADJUST_ARGS(); 2522 RESERVE_SPACE(4); 2523 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2524 ADJUST_ARGS(); 2525 gss_mech_put(gm); 2526 } else { 2527 RESERVE_SPACE(4); 2528 WRITE32(flav); 2529 ADJUST_ARGS(); 2530 } 2531 } 2532 out: 2533 if (exp) 2534 exp_put(exp); 2535 } 2536 2537 /* 2538 * The SETATTR encode routine is special -- it always encodes a bitmap, 2539 * regardless of the error status. 2540 */ 2541 static void 2542 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2543 { 2544 ENCODE_HEAD; 2545 2546 RESERVE_SPACE(12); 2547 if (nfserr) { 2548 WRITE32(2); 2549 WRITE32(0); 2550 WRITE32(0); 2551 } 2552 else { 2553 WRITE32(2); 2554 WRITE32(setattr->sa_bmval[0]); 2555 WRITE32(setattr->sa_bmval[1]); 2556 } 2557 ADJUST_ARGS(); 2558 } 2559 2560 static void 2561 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2562 { 2563 ENCODE_HEAD; 2564 2565 if (!nfserr) { 2566 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2567 WRITEMEM(&scd->se_clientid, 8); 2568 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2569 ADJUST_ARGS(); 2570 } 2571 else if (nfserr == nfserr_clid_inuse) { 2572 RESERVE_SPACE(8); 2573 WRITE32(0); 2574 WRITE32(0); 2575 ADJUST_ARGS(); 2576 } 2577 } 2578 2579 static void 2580 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2581 { 2582 ENCODE_HEAD; 2583 2584 if (!nfserr) { 2585 RESERVE_SPACE(16); 2586 WRITE32(write->wr_bytes_written); 2587 WRITE32(write->wr_how_written); 2588 WRITEMEM(write->wr_verifier.data, 8); 2589 ADJUST_ARGS(); 2590 } 2591 } 2592 2593 void 2594 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2595 { 2596 __be32 *statp; 2597 ENCODE_HEAD; 2598 2599 RESERVE_SPACE(8); 2600 WRITE32(op->opnum); 2601 statp = p++; /* to be backfilled at the end */ 2602 ADJUST_ARGS(); 2603 2604 switch (op->opnum) { 2605 case OP_ACCESS: 2606 nfsd4_encode_access(resp, op->status, &op->u.access); 2607 break; 2608 case OP_CLOSE: 2609 nfsd4_encode_close(resp, op->status, &op->u.close); 2610 break; 2611 case OP_COMMIT: 2612 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2613 break; 2614 case OP_CREATE: 2615 nfsd4_encode_create(resp, op->status, &op->u.create); 2616 break; 2617 case OP_DELEGRETURN: 2618 break; 2619 case OP_GETATTR: 2620 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2621 break; 2622 case OP_GETFH: 2623 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2624 break; 2625 case OP_LINK: 2626 nfsd4_encode_link(resp, op->status, &op->u.link); 2627 break; 2628 case OP_LOCK: 2629 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2630 break; 2631 case OP_LOCKT: 2632 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2633 break; 2634 case OP_LOCKU: 2635 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2636 break; 2637 case OP_LOOKUP: 2638 break; 2639 case OP_LOOKUPP: 2640 break; 2641 case OP_NVERIFY: 2642 break; 2643 case OP_OPEN: 2644 nfsd4_encode_open(resp, op->status, &op->u.open); 2645 break; 2646 case OP_OPEN_CONFIRM: 2647 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2648 break; 2649 case OP_OPEN_DOWNGRADE: 2650 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2651 break; 2652 case OP_PUTFH: 2653 break; 2654 case OP_PUTROOTFH: 2655 break; 2656 case OP_READ: 2657 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2658 break; 2659 case OP_READDIR: 2660 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2661 break; 2662 case OP_READLINK: 2663 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2664 break; 2665 case OP_REMOVE: 2666 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2667 break; 2668 case OP_RENAME: 2669 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2670 break; 2671 case OP_RENEW: 2672 break; 2673 case OP_RESTOREFH: 2674 break; 2675 case OP_SAVEFH: 2676 break; 2677 case OP_SECINFO: 2678 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo); 2679 break; 2680 case OP_SETATTR: 2681 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2682 break; 2683 case OP_SETCLIENTID: 2684 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2685 break; 2686 case OP_SETCLIENTID_CONFIRM: 2687 break; 2688 case OP_VERIFY: 2689 break; 2690 case OP_WRITE: 2691 nfsd4_encode_write(resp, op->status, &op->u.write); 2692 break; 2693 case OP_RELEASE_LOCKOWNER: 2694 break; 2695 default: 2696 break; 2697 } 2698 2699 /* 2700 * Note: We write the status directly, instead of using WRITE32(), 2701 * since it is already in network byte order. 2702 */ 2703 *statp = op->status; 2704 } 2705 2706 /* 2707 * Encode the reply stored in the stateowner reply cache 2708 * 2709 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2710 * previously sent already encoded operation. 2711 * 2712 * called with nfs4_lock_state() held 2713 */ 2714 void 2715 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2716 { 2717 ENCODE_HEAD; 2718 struct nfs4_replay *rp = op->replay; 2719 2720 BUG_ON(!rp); 2721 2722 RESERVE_SPACE(8); 2723 WRITE32(op->opnum); 2724 *p++ = rp->rp_status; /* already xdr'ed */ 2725 ADJUST_ARGS(); 2726 2727 RESERVE_SPACE(rp->rp_buflen); 2728 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2729 ADJUST_ARGS(); 2730 } 2731 2732 /* 2733 * END OF "GENERIC" ENCODE ROUTINES. 2734 */ 2735 2736 int 2737 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2738 { 2739 return xdr_ressize_check(rqstp, p); 2740 } 2741 2742 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2743 { 2744 if (args->ops != args->iops) { 2745 kfree(args->ops); 2746 args->ops = args->iops; 2747 } 2748 kfree(args->tmpp); 2749 args->tmpp = NULL; 2750 while (args->to_free) { 2751 struct tmpbuf *tb = args->to_free; 2752 args->to_free = tb->next; 2753 tb->release(tb->buf); 2754 kfree(tb); 2755 } 2756 } 2757 2758 int 2759 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2760 { 2761 __be32 status; 2762 2763 args->p = p; 2764 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2765 args->pagelist = rqstp->rq_arg.pages; 2766 args->pagelen = rqstp->rq_arg.page_len; 2767 args->tmpp = NULL; 2768 args->to_free = NULL; 2769 args->ops = args->iops; 2770 args->rqstp = rqstp; 2771 2772 status = nfsd4_decode_compound(args); 2773 if (status) { 2774 nfsd4_release_compoundargs(args); 2775 } 2776 return !status; 2777 } 2778 2779 int 2780 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2781 { 2782 /* 2783 * All that remains is to write the tag and operation count... 2784 */ 2785 struct kvec *iov; 2786 p = resp->tagp; 2787 *p++ = htonl(resp->taglen); 2788 memcpy(p, resp->tag, resp->taglen); 2789 p += XDR_QUADLEN(resp->taglen); 2790 *p++ = htonl(resp->opcnt); 2791 2792 if (rqstp->rq_res.page_len) 2793 iov = &rqstp->rq_res.tail[0]; 2794 else 2795 iov = &rqstp->rq_res.head[0]; 2796 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2797 BUG_ON(iov->iov_len > PAGE_SIZE); 2798 return 1; 2799 } 2800 2801 /* 2802 * Local variables: 2803 * c-basic-offset: 8 2804 * End: 2805 */ 2806