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/smp_lock.h> 48 #include <linux/fs.h> 49 #include <linux/namei.h> 50 #include <linux/vfs.h> 51 #include <linux/sunrpc/xdr.h> 52 #include <linux/sunrpc/svc.h> 53 #include <linux/sunrpc/clnt.h> 54 #include <linux/nfsd/nfsd.h> 55 #include <linux/nfsd/state.h> 56 #include <linux/nfsd/xdr4.h> 57 #include <linux/nfsd_idmap.h> 58 #include <linux/nfs4.h> 59 #include <linux/nfs4_acl.h> 60 61 #define NFSDDBG_FACILITY NFSDDBG_XDR 62 63 /* 64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 65 * directory in order to indicate to the client that a filesystem boundary is present 66 * We use a fixed fsid for a referral 67 */ 68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 70 71 static __be32 72 check_filename(char *str, int len, __be32 err) 73 { 74 int i; 75 76 if (len == 0) 77 return nfserr_inval; 78 if (isdotent(str, len)) 79 return err; 80 for (i = 0; i < len; i++) 81 if (str[i] == '/') 82 return err; 83 return 0; 84 } 85 86 /* 87 * START OF "GENERIC" DECODE ROUTINES. 88 * These may look a little ugly since they are imported from a "generic" 89 * set of XDR encode/decode routines which are intended to be shared by 90 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 91 * 92 * If the pain of reading these is too great, it should be a straightforward 93 * task to translate them into Linux-specific versions which are more 94 * consistent with the style used in NFSv2/v3... 95 */ 96 #define DECODE_HEAD \ 97 __be32 *p; \ 98 __be32 status 99 #define DECODE_TAIL \ 100 status = 0; \ 101 out: \ 102 return status; \ 103 xdr_error: \ 104 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 105 status = nfserr_bad_xdr; \ 106 goto out 107 108 #define READ32(x) (x) = ntohl(*p++) 109 #define READ64(x) do { \ 110 (x) = (u64)ntohl(*p++) << 32; \ 111 (x) |= ntohl(*p++); \ 112 } while (0) 113 #define READTIME(x) do { \ 114 p++; \ 115 (x) = ntohl(*p++); \ 116 p++; \ 117 } while (0) 118 #define READMEM(x,nbytes) do { \ 119 x = (char *)p; \ 120 p += XDR_QUADLEN(nbytes); \ 121 } while (0) 122 #define SAVEMEM(x,nbytes) do { \ 123 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 124 savemem(argp, p, nbytes) : \ 125 (char *)p)) { \ 126 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 127 goto xdr_error; \ 128 } \ 129 p += XDR_QUADLEN(nbytes); \ 130 } while (0) 131 #define COPYMEM(x,nbytes) do { \ 132 memcpy((x), p, nbytes); \ 133 p += XDR_QUADLEN(nbytes); \ 134 } while (0) 135 136 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 137 #define READ_BUF(nbytes) do { \ 138 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 139 p = argp->p; \ 140 argp->p += XDR_QUADLEN(nbytes); \ 141 } else if (!(p = read_buf(argp, nbytes))) { \ 142 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 143 goto xdr_error; \ 144 } \ 145 } while (0) 146 147 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) 148 { 149 /* We want more bytes than seem to be available. 150 * Maybe we need a new page, maybe we have just run out 151 */ 152 int avail = (char*)argp->end - (char*)argp->p; 153 __be32 *p; 154 if (avail + argp->pagelen < nbytes) 155 return NULL; 156 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 157 return NULL; 158 /* ok, we can do it with the current plus the next page */ 159 if (nbytes <= sizeof(argp->tmp)) 160 p = argp->tmp; 161 else { 162 kfree(argp->tmpp); 163 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 164 if (!p) 165 return NULL; 166 167 } 168 memcpy(p, argp->p, avail); 169 /* step to next page */ 170 argp->p = page_address(argp->pagelist[0]); 171 argp->pagelist++; 172 if (argp->pagelen < PAGE_SIZE) { 173 argp->end = p + (argp->pagelen>>2); 174 argp->pagelen = 0; 175 } else { 176 argp->end = p + (PAGE_SIZE>>2); 177 argp->pagelen -= PAGE_SIZE; 178 } 179 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 180 argp->p += XDR_QUADLEN(nbytes - avail); 181 return p; 182 } 183 184 static int 185 defer_free(struct nfsd4_compoundargs *argp, 186 void (*release)(const void *), void *p) 187 { 188 struct tmpbuf *tb; 189 190 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 191 if (!tb) 192 return -ENOMEM; 193 tb->buf = p; 194 tb->release = release; 195 tb->next = argp->to_free; 196 argp->to_free = tb; 197 return 0; 198 } 199 200 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 201 { 202 if (p == argp->tmp) { 203 p = kmalloc(nbytes, GFP_KERNEL); 204 if (!p) 205 return NULL; 206 memcpy(p, argp->tmp, nbytes); 207 } else { 208 BUG_ON(p != argp->tmpp); 209 argp->tmpp = NULL; 210 } 211 if (defer_free(argp, kfree, p)) { 212 kfree(p); 213 return NULL; 214 } else 215 return (char *)p; 216 } 217 218 static __be32 219 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 220 { 221 u32 bmlen; 222 DECODE_HEAD; 223 224 bmval[0] = 0; 225 bmval[1] = 0; 226 227 READ_BUF(4); 228 READ32(bmlen); 229 if (bmlen > 1000) 230 goto xdr_error; 231 232 READ_BUF(bmlen << 2); 233 if (bmlen > 0) 234 READ32(bmval[0]); 235 if (bmlen > 1) 236 READ32(bmval[1]); 237 238 DECODE_TAIL; 239 } 240 241 static __be32 242 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 243 struct nfs4_acl **acl) 244 { 245 int expected_len, len = 0; 246 u32 dummy32; 247 char *buf; 248 int host_err; 249 250 DECODE_HEAD; 251 iattr->ia_valid = 0; 252 if ((status = nfsd4_decode_bitmap(argp, bmval))) 253 return status; 254 255 /* 256 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP; 257 * read-only attributes return ERR_INVAL. 258 */ 259 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 260 return nfserr_attrnotsupp; 261 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 262 return nfserr_inval; 263 264 READ_BUF(4); 265 READ32(expected_len); 266 267 if (bmval[0] & FATTR4_WORD0_SIZE) { 268 READ_BUF(8); 269 len += 8; 270 READ64(iattr->ia_size); 271 iattr->ia_valid |= ATTR_SIZE; 272 } 273 if (bmval[0] & FATTR4_WORD0_ACL) { 274 int nace; 275 struct nfs4_ace *ace; 276 277 READ_BUF(4); len += 4; 278 READ32(nace); 279 280 if (nace > NFS4_ACL_MAX) 281 return nfserr_resource; 282 283 *acl = nfs4_acl_new(nace); 284 if (*acl == NULL) { 285 host_err = -ENOMEM; 286 goto out_nfserr; 287 } 288 defer_free(argp, kfree, *acl); 289 290 (*acl)->naces = nace; 291 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 292 READ_BUF(16); len += 16; 293 READ32(ace->type); 294 READ32(ace->flag); 295 READ32(ace->access_mask); 296 READ32(dummy32); 297 READ_BUF(dummy32); 298 len += XDR_QUADLEN(dummy32) << 2; 299 READMEM(buf, dummy32); 300 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 301 host_err = 0; 302 if (ace->whotype != NFS4_ACL_WHO_NAMED) 303 ace->who = 0; 304 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 305 host_err = nfsd_map_name_to_gid(argp->rqstp, 306 buf, dummy32, &ace->who); 307 else 308 host_err = nfsd_map_name_to_uid(argp->rqstp, 309 buf, dummy32, &ace->who); 310 if (host_err) 311 goto out_nfserr; 312 } 313 } else 314 *acl = NULL; 315 if (bmval[1] & FATTR4_WORD1_MODE) { 316 READ_BUF(4); 317 len += 4; 318 READ32(iattr->ia_mode); 319 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 320 iattr->ia_valid |= ATTR_MODE; 321 } 322 if (bmval[1] & FATTR4_WORD1_OWNER) { 323 READ_BUF(4); 324 len += 4; 325 READ32(dummy32); 326 READ_BUF(dummy32); 327 len += (XDR_QUADLEN(dummy32) << 2); 328 READMEM(buf, dummy32); 329 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 330 goto out_nfserr; 331 iattr->ia_valid |= ATTR_UID; 332 } 333 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 334 READ_BUF(4); 335 len += 4; 336 READ32(dummy32); 337 READ_BUF(dummy32); 338 len += (XDR_QUADLEN(dummy32) << 2); 339 READMEM(buf, dummy32); 340 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 341 goto out_nfserr; 342 iattr->ia_valid |= ATTR_GID; 343 } 344 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 345 READ_BUF(4); 346 len += 4; 347 READ32(dummy32); 348 switch (dummy32) { 349 case NFS4_SET_TO_CLIENT_TIME: 350 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 351 all 32 bits of 'nseconds'. */ 352 READ_BUF(12); 353 len += 12; 354 READ32(dummy32); 355 if (dummy32) 356 return nfserr_inval; 357 READ32(iattr->ia_atime.tv_sec); 358 READ32(iattr->ia_atime.tv_nsec); 359 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 360 return nfserr_inval; 361 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 362 break; 363 case NFS4_SET_TO_SERVER_TIME: 364 iattr->ia_valid |= ATTR_ATIME; 365 break; 366 default: 367 goto xdr_error; 368 } 369 } 370 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { 371 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 372 all 32 bits of 'nseconds'. */ 373 READ_BUF(12); 374 len += 12; 375 READ32(dummy32); 376 if (dummy32) 377 return nfserr_inval; 378 READ32(iattr->ia_ctime.tv_sec); 379 READ32(iattr->ia_ctime.tv_nsec); 380 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) 381 return nfserr_inval; 382 iattr->ia_valid |= ATTR_CTIME; 383 } 384 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 385 READ_BUF(4); 386 len += 4; 387 READ32(dummy32); 388 switch (dummy32) { 389 case NFS4_SET_TO_CLIENT_TIME: 390 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 391 all 32 bits of 'nseconds'. */ 392 READ_BUF(12); 393 len += 12; 394 READ32(dummy32); 395 if (dummy32) 396 return nfserr_inval; 397 READ32(iattr->ia_mtime.tv_sec); 398 READ32(iattr->ia_mtime.tv_nsec); 399 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 400 return nfserr_inval; 401 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 402 break; 403 case NFS4_SET_TO_SERVER_TIME: 404 iattr->ia_valid |= ATTR_MTIME; 405 break; 406 default: 407 goto xdr_error; 408 } 409 } 410 if (len != expected_len) 411 goto xdr_error; 412 413 DECODE_TAIL; 414 415 out_nfserr: 416 status = nfserrno(host_err); 417 goto out; 418 } 419 420 static __be32 421 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 422 { 423 DECODE_HEAD; 424 425 READ_BUF(4); 426 READ32(access->ac_req_access); 427 428 DECODE_TAIL; 429 } 430 431 static __be32 432 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 433 { 434 DECODE_HEAD; 435 436 close->cl_stateowner = NULL; 437 READ_BUF(4 + sizeof(stateid_t)); 438 READ32(close->cl_seqid); 439 READ32(close->cl_stateid.si_generation); 440 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 441 442 DECODE_TAIL; 443 } 444 445 446 static __be32 447 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 448 { 449 DECODE_HEAD; 450 451 READ_BUF(12); 452 READ64(commit->co_offset); 453 READ32(commit->co_count); 454 455 DECODE_TAIL; 456 } 457 458 static __be32 459 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 460 { 461 DECODE_HEAD; 462 463 READ_BUF(4); 464 READ32(create->cr_type); 465 switch (create->cr_type) { 466 case NF4LNK: 467 READ_BUF(4); 468 READ32(create->cr_linklen); 469 READ_BUF(create->cr_linklen); 470 SAVEMEM(create->cr_linkname, create->cr_linklen); 471 break; 472 case NF4BLK: 473 case NF4CHR: 474 READ_BUF(8); 475 READ32(create->cr_specdata1); 476 READ32(create->cr_specdata2); 477 break; 478 case NF4SOCK: 479 case NF4FIFO: 480 case NF4DIR: 481 default: 482 break; 483 } 484 485 READ_BUF(4); 486 READ32(create->cr_namelen); 487 READ_BUF(create->cr_namelen); 488 SAVEMEM(create->cr_name, create->cr_namelen); 489 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 490 return status; 491 492 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 493 goto out; 494 495 DECODE_TAIL; 496 } 497 498 static inline __be32 499 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 500 { 501 DECODE_HEAD; 502 503 READ_BUF(sizeof(stateid_t)); 504 READ32(dr->dr_stateid.si_generation); 505 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 506 507 DECODE_TAIL; 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(36); 551 READ32(lock->lk_new_open_seqid); 552 READ32(lock->lk_new_open_stateid.si_generation); 553 554 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 555 READ32(lock->lk_new_lock_seqid); 556 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 557 READ32(lock->lk_new_owner.len); 558 READ_BUF(lock->lk_new_owner.len); 559 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 560 } else { 561 READ_BUF(20); 562 READ32(lock->lk_old_lock_stateid.si_generation); 563 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 564 READ32(lock->lk_old_lock_seqid); 565 } 566 567 DECODE_TAIL; 568 } 569 570 static __be32 571 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 572 { 573 DECODE_HEAD; 574 575 READ_BUF(32); 576 READ32(lockt->lt_type); 577 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 578 goto xdr_error; 579 READ64(lockt->lt_offset); 580 READ64(lockt->lt_length); 581 COPYMEM(&lockt->lt_clientid, 8); 582 READ32(lockt->lt_owner.len); 583 READ_BUF(lockt->lt_owner.len); 584 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 585 586 DECODE_TAIL; 587 } 588 589 static __be32 590 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 591 { 592 DECODE_HEAD; 593 594 locku->lu_stateowner = NULL; 595 READ_BUF(24 + sizeof(stateid_t)); 596 READ32(locku->lu_type); 597 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 598 goto xdr_error; 599 READ32(locku->lu_seqid); 600 READ32(locku->lu_stateid.si_generation); 601 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 602 READ64(locku->lu_offset); 603 READ64(locku->lu_length); 604 605 DECODE_TAIL; 606 } 607 608 static __be32 609 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 610 { 611 DECODE_HEAD; 612 613 READ_BUF(4); 614 READ32(lookup->lo_len); 615 READ_BUF(lookup->lo_len); 616 SAVEMEM(lookup->lo_name, lookup->lo_len); 617 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 618 return status; 619 620 DECODE_TAIL; 621 } 622 623 static __be32 624 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 625 { 626 DECODE_HEAD; 627 628 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 629 open->op_iattr.ia_valid = 0; 630 open->op_stateowner = NULL; 631 632 /* seqid, share_access, share_deny, clientid, ownerlen */ 633 READ_BUF(16 + sizeof(clientid_t)); 634 READ32(open->op_seqid); 635 READ32(open->op_share_access); 636 READ32(open->op_share_deny); 637 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 638 READ32(open->op_owner.len); 639 640 /* owner, open_flag */ 641 READ_BUF(open->op_owner.len + 4); 642 SAVEMEM(open->op_owner.data, open->op_owner.len); 643 READ32(open->op_create); 644 switch (open->op_create) { 645 case NFS4_OPEN_NOCREATE: 646 break; 647 case NFS4_OPEN_CREATE: 648 READ_BUF(4); 649 READ32(open->op_createmode); 650 switch (open->op_createmode) { 651 case NFS4_CREATE_UNCHECKED: 652 case NFS4_CREATE_GUARDED: 653 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 654 goto out; 655 break; 656 case NFS4_CREATE_EXCLUSIVE: 657 READ_BUF(8); 658 COPYMEM(open->op_verf.data, 8); 659 break; 660 default: 661 goto xdr_error; 662 } 663 break; 664 default: 665 goto xdr_error; 666 } 667 668 /* open_claim */ 669 READ_BUF(4); 670 READ32(open->op_claim_type); 671 switch (open->op_claim_type) { 672 case NFS4_OPEN_CLAIM_NULL: 673 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 674 READ_BUF(4); 675 READ32(open->op_fname.len); 676 READ_BUF(open->op_fname.len); 677 SAVEMEM(open->op_fname.data, open->op_fname.len); 678 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 679 return status; 680 break; 681 case NFS4_OPEN_CLAIM_PREVIOUS: 682 READ_BUF(4); 683 READ32(open->op_delegate_type); 684 break; 685 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 686 READ_BUF(sizeof(stateid_t) + 4); 687 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 688 READ32(open->op_fname.len); 689 READ_BUF(open->op_fname.len); 690 SAVEMEM(open->op_fname.data, open->op_fname.len); 691 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 692 return status; 693 break; 694 default: 695 goto xdr_error; 696 } 697 698 DECODE_TAIL; 699 } 700 701 static __be32 702 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 703 { 704 DECODE_HEAD; 705 706 open_conf->oc_stateowner = NULL; 707 READ_BUF(4 + sizeof(stateid_t)); 708 READ32(open_conf->oc_req_stateid.si_generation); 709 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 710 READ32(open_conf->oc_seqid); 711 712 DECODE_TAIL; 713 } 714 715 static __be32 716 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 717 { 718 DECODE_HEAD; 719 720 open_down->od_stateowner = NULL; 721 READ_BUF(12 + sizeof(stateid_t)); 722 READ32(open_down->od_stateid.si_generation); 723 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 724 READ32(open_down->od_seqid); 725 READ32(open_down->od_share_access); 726 READ32(open_down->od_share_deny); 727 728 DECODE_TAIL; 729 } 730 731 static __be32 732 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 733 { 734 DECODE_HEAD; 735 736 READ_BUF(4); 737 READ32(putfh->pf_fhlen); 738 if (putfh->pf_fhlen > NFS4_FHSIZE) 739 goto xdr_error; 740 READ_BUF(putfh->pf_fhlen); 741 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 742 743 DECODE_TAIL; 744 } 745 746 static __be32 747 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 748 { 749 DECODE_HEAD; 750 751 READ_BUF(sizeof(stateid_t) + 12); 752 READ32(read->rd_stateid.si_generation); 753 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 754 READ64(read->rd_offset); 755 READ32(read->rd_length); 756 757 DECODE_TAIL; 758 } 759 760 static __be32 761 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 762 { 763 DECODE_HEAD; 764 765 READ_BUF(24); 766 READ64(readdir->rd_cookie); 767 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 768 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 769 READ32(readdir->rd_maxcount); 770 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 771 goto out; 772 773 DECODE_TAIL; 774 } 775 776 static __be32 777 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 778 { 779 DECODE_HEAD; 780 781 READ_BUF(4); 782 READ32(remove->rm_namelen); 783 READ_BUF(remove->rm_namelen); 784 SAVEMEM(remove->rm_name, remove->rm_namelen); 785 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 786 return status; 787 788 DECODE_TAIL; 789 } 790 791 static __be32 792 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 793 { 794 DECODE_HEAD; 795 796 READ_BUF(4); 797 READ32(rename->rn_snamelen); 798 READ_BUF(rename->rn_snamelen + 4); 799 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 800 READ32(rename->rn_tnamelen); 801 READ_BUF(rename->rn_tnamelen); 802 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 803 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 804 return status; 805 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 806 return status; 807 808 DECODE_TAIL; 809 } 810 811 static __be32 812 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 813 { 814 DECODE_HEAD; 815 816 READ_BUF(sizeof(clientid_t)); 817 COPYMEM(clientid, sizeof(clientid_t)); 818 819 DECODE_TAIL; 820 } 821 822 static __be32 823 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 824 { 825 DECODE_HEAD; 826 827 READ_BUF(sizeof(stateid_t)); 828 READ32(setattr->sa_stateid.si_generation); 829 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 830 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 831 goto out; 832 833 DECODE_TAIL; 834 } 835 836 static __be32 837 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 838 { 839 DECODE_HEAD; 840 841 READ_BUF(12); 842 COPYMEM(setclientid->se_verf.data, 8); 843 READ32(setclientid->se_namelen); 844 845 READ_BUF(setclientid->se_namelen + 8); 846 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 847 READ32(setclientid->se_callback_prog); 848 READ32(setclientid->se_callback_netid_len); 849 850 READ_BUF(setclientid->se_callback_netid_len + 4); 851 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 852 READ32(setclientid->se_callback_addr_len); 853 854 READ_BUF(setclientid->se_callback_addr_len + 4); 855 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 856 READ32(setclientid->se_callback_ident); 857 858 DECODE_TAIL; 859 } 860 861 static __be32 862 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 863 { 864 DECODE_HEAD; 865 866 READ_BUF(8 + sizeof(nfs4_verifier)); 867 COPYMEM(&scd_c->sc_clientid, 8); 868 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 869 870 DECODE_TAIL; 871 } 872 873 /* Also used for NVERIFY */ 874 static __be32 875 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 876 { 877 #if 0 878 struct nfsd4_compoundargs save = { 879 .p = argp->p, 880 .end = argp->end, 881 .rqstp = argp->rqstp, 882 }; 883 u32 ve_bmval[2]; 884 struct iattr ve_iattr; /* request */ 885 struct nfs4_acl *ve_acl; /* request */ 886 #endif 887 DECODE_HEAD; 888 889 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 890 goto out; 891 892 /* For convenience's sake, we compare raw xdr'd attributes in 893 * nfsd4_proc_verify; however we still decode here just to return 894 * correct error in case of bad xdr. */ 895 #if 0 896 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 897 if (status == nfserr_inval) { 898 status = nfserrno(status); 899 goto out; 900 } 901 #endif 902 READ_BUF(4); 903 READ32(verify->ve_attrlen); 904 READ_BUF(verify->ve_attrlen); 905 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 906 907 DECODE_TAIL; 908 } 909 910 static __be32 911 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 912 { 913 int avail; 914 int v; 915 int len; 916 DECODE_HEAD; 917 918 READ_BUF(sizeof(stateid_opaque_t) + 20); 919 READ32(write->wr_stateid.si_generation); 920 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 921 READ64(write->wr_offset); 922 READ32(write->wr_stable_how); 923 if (write->wr_stable_how > 2) 924 goto xdr_error; 925 READ32(write->wr_buflen); 926 927 /* Sorry .. no magic macros for this.. * 928 * READ_BUF(write->wr_buflen); 929 * SAVEMEM(write->wr_buf, write->wr_buflen); 930 */ 931 avail = (char*)argp->end - (char*)argp->p; 932 if (avail + argp->pagelen < write->wr_buflen) { 933 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); 934 goto xdr_error; 935 } 936 argp->rqstp->rq_vec[0].iov_base = p; 937 argp->rqstp->rq_vec[0].iov_len = avail; 938 v = 0; 939 len = write->wr_buflen; 940 while (len > argp->rqstp->rq_vec[v].iov_len) { 941 len -= argp->rqstp->rq_vec[v].iov_len; 942 v++; 943 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 944 argp->pagelist++; 945 if (argp->pagelen >= PAGE_SIZE) { 946 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 947 argp->pagelen -= PAGE_SIZE; 948 } else { 949 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 950 argp->pagelen -= len; 951 } 952 } 953 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 954 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 955 argp->rqstp->rq_vec[v].iov_len = len; 956 write->wr_vlen = v+1; 957 958 DECODE_TAIL; 959 } 960 961 static __be32 962 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 963 { 964 DECODE_HEAD; 965 966 READ_BUF(12); 967 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 968 READ32(rlockowner->rl_owner.len); 969 READ_BUF(rlockowner->rl_owner.len); 970 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 971 972 DECODE_TAIL; 973 } 974 975 static __be32 976 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 977 { 978 DECODE_HEAD; 979 struct nfsd4_op *op; 980 int i; 981 982 /* 983 * XXX: According to spec, we should check the tag 984 * for UTF-8 compliance. I'm postponing this for 985 * now because it seems that some clients do use 986 * binary tags. 987 */ 988 READ_BUF(4); 989 READ32(argp->taglen); 990 READ_BUF(argp->taglen + 8); 991 SAVEMEM(argp->tag, argp->taglen); 992 READ32(argp->minorversion); 993 READ32(argp->opcnt); 994 995 if (argp->taglen > NFSD4_MAX_TAGLEN) 996 goto xdr_error; 997 if (argp->opcnt > 100) 998 goto xdr_error; 999 1000 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1001 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1002 if (!argp->ops) { 1003 argp->ops = argp->iops; 1004 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n"); 1005 goto xdr_error; 1006 } 1007 } 1008 1009 for (i = 0; i < argp->opcnt; i++) { 1010 op = &argp->ops[i]; 1011 op->replay = NULL; 1012 1013 /* 1014 * We can't use READ_BUF() here because we need to handle 1015 * a missing opcode as an OP_WRITE + 1. So we need to check 1016 * to see if we're truly at the end of our buffer or if there 1017 * is another page we need to flip to. 1018 */ 1019 1020 if (argp->p == argp->end) { 1021 if (argp->pagelen < 4) { 1022 /* There isn't an opcode still on the wire */ 1023 op->opnum = OP_WRITE + 1; 1024 op->status = nfserr_bad_xdr; 1025 argp->opcnt = i+1; 1026 break; 1027 } 1028 1029 /* 1030 * False alarm. We just hit a page boundary, but there 1031 * is still data available. Move pointer across page 1032 * boundary. *snip from READ_BUF* 1033 */ 1034 argp->p = page_address(argp->pagelist[0]); 1035 argp->pagelist++; 1036 if (argp->pagelen < PAGE_SIZE) { 1037 argp->end = p + (argp->pagelen>>2); 1038 argp->pagelen = 0; 1039 } else { 1040 argp->end = p + (PAGE_SIZE>>2); 1041 argp->pagelen -= PAGE_SIZE; 1042 } 1043 } 1044 op->opnum = ntohl(*argp->p++); 1045 1046 switch (op->opnum) { 1047 case 2: /* Reserved operation */ 1048 op->opnum = OP_ILLEGAL; 1049 if (argp->minorversion == 0) 1050 op->status = nfserr_op_illegal; 1051 else 1052 op->status = nfserr_minor_vers_mismatch; 1053 break; 1054 case OP_ACCESS: 1055 op->status = nfsd4_decode_access(argp, &op->u.access); 1056 break; 1057 case OP_CLOSE: 1058 op->status = nfsd4_decode_close(argp, &op->u.close); 1059 break; 1060 case OP_COMMIT: 1061 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1062 break; 1063 case OP_CREATE: 1064 op->status = nfsd4_decode_create(argp, &op->u.create); 1065 break; 1066 case OP_DELEGRETURN: 1067 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1068 break; 1069 case OP_GETATTR: 1070 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1071 break; 1072 case OP_GETFH: 1073 op->status = nfs_ok; 1074 break; 1075 case OP_LINK: 1076 op->status = nfsd4_decode_link(argp, &op->u.link); 1077 break; 1078 case OP_LOCK: 1079 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1080 break; 1081 case OP_LOCKT: 1082 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1083 break; 1084 case OP_LOCKU: 1085 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1086 break; 1087 case OP_LOOKUP: 1088 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1089 break; 1090 case OP_LOOKUPP: 1091 op->status = nfs_ok; 1092 break; 1093 case OP_NVERIFY: 1094 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1095 break; 1096 case OP_OPEN: 1097 op->status = nfsd4_decode_open(argp, &op->u.open); 1098 break; 1099 case OP_OPEN_CONFIRM: 1100 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1101 break; 1102 case OP_OPEN_DOWNGRADE: 1103 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1104 break; 1105 case OP_PUTFH: 1106 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1107 break; 1108 case OP_PUTROOTFH: 1109 op->status = nfs_ok; 1110 break; 1111 case OP_READ: 1112 op->status = nfsd4_decode_read(argp, &op->u.read); 1113 break; 1114 case OP_READDIR: 1115 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1116 break; 1117 case OP_READLINK: 1118 op->status = nfs_ok; 1119 break; 1120 case OP_REMOVE: 1121 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1122 break; 1123 case OP_RENAME: 1124 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1125 break; 1126 case OP_RESTOREFH: 1127 op->status = nfs_ok; 1128 break; 1129 case OP_RENEW: 1130 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1131 break; 1132 case OP_SAVEFH: 1133 op->status = nfs_ok; 1134 break; 1135 case OP_SETATTR: 1136 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1137 break; 1138 case OP_SETCLIENTID: 1139 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1140 break; 1141 case OP_SETCLIENTID_CONFIRM: 1142 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1143 break; 1144 case OP_VERIFY: 1145 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1146 break; 1147 case OP_WRITE: 1148 op->status = nfsd4_decode_write(argp, &op->u.write); 1149 break; 1150 case OP_RELEASE_LOCKOWNER: 1151 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1152 break; 1153 default: 1154 op->opnum = OP_ILLEGAL; 1155 op->status = nfserr_op_illegal; 1156 break; 1157 } 1158 1159 if (op->status) { 1160 argp->opcnt = i+1; 1161 break; 1162 } 1163 } 1164 1165 DECODE_TAIL; 1166 } 1167 /* 1168 * END OF "GENERIC" DECODE ROUTINES. 1169 */ 1170 1171 /* 1172 * START OF "GENERIC" ENCODE ROUTINES. 1173 * These may look a little ugly since they are imported from a "generic" 1174 * set of XDR encode/decode routines which are intended to be shared by 1175 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1176 * 1177 * If the pain of reading these is too great, it should be a straightforward 1178 * task to translate them into Linux-specific versions which are more 1179 * consistent with the style used in NFSv2/v3... 1180 */ 1181 #define ENCODE_HEAD __be32 *p 1182 1183 #define WRITE32(n) *p++ = htonl(n) 1184 #define WRITE64(n) do { \ 1185 *p++ = htonl((u32)((n) >> 32)); \ 1186 *p++ = htonl((u32)(n)); \ 1187 } while (0) 1188 #define WRITEMEM(ptr,nbytes) do { \ 1189 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1190 memcpy(p, ptr, nbytes); \ 1191 p += XDR_QUADLEN(nbytes); \ 1192 } while (0) 1193 #define WRITECINFO(c) do { \ 1194 *p++ = htonl(c.atomic); \ 1195 *p++ = htonl(c.before_ctime_sec); \ 1196 *p++ = htonl(c.before_ctime_nsec); \ 1197 *p++ = htonl(c.after_ctime_sec); \ 1198 *p++ = htonl(c.after_ctime_nsec); \ 1199 } while (0) 1200 1201 #define RESERVE_SPACE(nbytes) do { \ 1202 p = resp->p; \ 1203 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1204 } while (0) 1205 #define ADJUST_ARGS() resp->p = p 1206 1207 /* 1208 * Header routine to setup seqid operation replay cache 1209 */ 1210 #define ENCODE_SEQID_OP_HEAD \ 1211 __be32 *p; \ 1212 __be32 *save; \ 1213 \ 1214 save = resp->p; 1215 1216 /* 1217 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1218 * is where sequence id's are incremented, and the replay cache is filled. 1219 * Note that we increment sequence id's here, at the last moment, so we're sure 1220 * we know whether the error to be returned is a sequence id mutating error. 1221 */ 1222 1223 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1224 if (seqid_mutating_err(nfserr) && stateowner) { \ 1225 stateowner->so_seqid++; \ 1226 stateowner->so_replay.rp_status = nfserr; \ 1227 stateowner->so_replay.rp_buflen = \ 1228 (((char *)(resp)->p - (char *)save)); \ 1229 memcpy(stateowner->so_replay.rp_buf, save, \ 1230 stateowner->so_replay.rp_buflen); \ 1231 } } while (0); 1232 1233 /* Encode as an array of strings the string given with components 1234 * seperated @sep. 1235 */ 1236 static __be32 nfsd4_encode_components(char sep, char *components, 1237 __be32 **pp, int *buflen) 1238 { 1239 __be32 *p = *pp; 1240 __be32 *countp = p; 1241 int strlen, count=0; 1242 char *str, *end; 1243 1244 dprintk("nfsd4_encode_components(%s)\n", components); 1245 if ((*buflen -= 4) < 0) 1246 return nfserr_resource; 1247 WRITE32(0); /* We will fill this in with @count later */ 1248 end = str = components; 1249 while (*end) { 1250 for (; *end && (*end != sep); end++) 1251 ; /* Point to end of component */ 1252 strlen = end - str; 1253 if (strlen) { 1254 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1255 return nfserr_resource; 1256 WRITE32(strlen); 1257 WRITEMEM(str, strlen); 1258 count++; 1259 } 1260 else 1261 end++; 1262 str = end; 1263 } 1264 *pp = p; 1265 p = countp; 1266 WRITE32(count); 1267 return 0; 1268 } 1269 1270 /* 1271 * encode a location element of a fs_locations structure 1272 */ 1273 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1274 __be32 **pp, int *buflen) 1275 { 1276 __be32 status; 1277 __be32 *p = *pp; 1278 1279 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1280 if (status) 1281 return status; 1282 status = nfsd4_encode_components('/', location->path, &p, buflen); 1283 if (status) 1284 return status; 1285 *pp = p; 1286 return 0; 1287 } 1288 1289 /* 1290 * Return the path to an export point in the pseudo filesystem namespace 1291 * Returned string is safe to use as long as the caller holds a reference 1292 * to @exp. 1293 */ 1294 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1295 { 1296 struct svc_fh tmp_fh; 1297 char *path, *rootpath; 1298 1299 fh_init(&tmp_fh, NFS4_FHSIZE); 1300 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle); 1301 if (*stat) 1302 return NULL; 1303 rootpath = tmp_fh.fh_export->ex_path; 1304 1305 path = exp->ex_path; 1306 1307 if (strncmp(path, rootpath, strlen(rootpath))) { 1308 printk("nfsd: fs_locations failed;" 1309 "%s is not contained in %s\n", path, rootpath); 1310 *stat = nfserr_notsupp; 1311 return NULL; 1312 } 1313 1314 return path + strlen(rootpath); 1315 } 1316 1317 /* 1318 * encode a fs_locations structure 1319 */ 1320 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1321 struct svc_export *exp, 1322 __be32 **pp, int *buflen) 1323 { 1324 __be32 status; 1325 int i; 1326 __be32 *p = *pp; 1327 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1328 char *root = nfsd4_path(rqstp, exp, &status); 1329 1330 if (status) 1331 return status; 1332 status = nfsd4_encode_components('/', root, &p, buflen); 1333 if (status) 1334 return status; 1335 if ((*buflen -= 4) < 0) 1336 return nfserr_resource; 1337 WRITE32(fslocs->locations_count); 1338 for (i=0; i<fslocs->locations_count; i++) { 1339 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1340 &p, buflen); 1341 if (status) 1342 return status; 1343 } 1344 *pp = p; 1345 return 0; 1346 } 1347 1348 static u32 nfs4_ftypes[16] = { 1349 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1350 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1351 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1352 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1353 }; 1354 1355 static __be32 1356 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1357 __be32 **p, int *buflen) 1358 { 1359 int status; 1360 1361 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1362 return nfserr_resource; 1363 if (whotype != NFS4_ACL_WHO_NAMED) 1364 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1365 else if (group) 1366 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1367 else 1368 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1369 if (status < 0) 1370 return nfserrno(status); 1371 *p = xdr_encode_opaque(*p, NULL, status); 1372 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1373 BUG_ON(*buflen < 0); 1374 return 0; 1375 } 1376 1377 static inline __be32 1378 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1379 { 1380 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1381 } 1382 1383 static inline __be32 1384 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1385 { 1386 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1387 } 1388 1389 static inline __be32 1390 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1391 __be32 **p, int *buflen) 1392 { 1393 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1394 } 1395 1396 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1397 FATTR4_WORD0_RDATTR_ERROR) 1398 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1399 1400 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1401 { 1402 /* As per referral draft: */ 1403 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1404 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1405 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1406 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1407 *rdattr_err = NFSERR_MOVED; 1408 else 1409 return nfserr_moved; 1410 } 1411 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1412 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1413 return 0; 1414 } 1415 1416 /* 1417 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1418 * ourselves. 1419 * 1420 * @countp is the buffer size in _words_; upon successful return this becomes 1421 * replaced with the number of words written. 1422 */ 1423 __be32 1424 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1425 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1426 struct svc_rqst *rqstp) 1427 { 1428 u32 bmval0 = bmval[0]; 1429 u32 bmval1 = bmval[1]; 1430 struct kstat stat; 1431 struct svc_fh tempfh; 1432 struct kstatfs statfs; 1433 int buflen = *countp << 2; 1434 __be32 *attrlenp; 1435 u32 dummy; 1436 u64 dummy64; 1437 u32 rdattr_err = 0; 1438 __be32 *p = buffer; 1439 __be32 status; 1440 int err; 1441 int aclsupport = 0; 1442 struct nfs4_acl *acl = NULL; 1443 1444 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1445 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1446 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1447 1448 if (exp->ex_fslocs.migrated) { 1449 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1450 if (status) 1451 goto out; 1452 } 1453 1454 err = vfs_getattr(exp->ex_mnt, dentry, &stat); 1455 if (err) 1456 goto out_nfserr; 1457 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) || 1458 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1459 FATTR4_WORD1_SPACE_TOTAL))) { 1460 err = vfs_statfs(dentry, &statfs); 1461 if (err) 1462 goto out_nfserr; 1463 } 1464 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1465 fh_init(&tempfh, NFS4_FHSIZE); 1466 status = fh_compose(&tempfh, exp, dentry, NULL); 1467 if (status) 1468 goto out; 1469 fhp = &tempfh; 1470 } 1471 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1472 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1473 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1474 aclsupport = (err == 0); 1475 if (bmval0 & FATTR4_WORD0_ACL) { 1476 if (err == -EOPNOTSUPP) 1477 bmval0 &= ~FATTR4_WORD0_ACL; 1478 else if (err == -EINVAL) { 1479 status = nfserr_attrnotsupp; 1480 goto out; 1481 } else if (err != 0) 1482 goto out_nfserr; 1483 } 1484 } 1485 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1486 if (exp->ex_fslocs.locations == NULL) { 1487 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1488 } 1489 } 1490 if ((buflen -= 16) < 0) 1491 goto out_resource; 1492 1493 WRITE32(2); 1494 WRITE32(bmval0); 1495 WRITE32(bmval1); 1496 attrlenp = p++; /* to be backfilled later */ 1497 1498 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1499 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1500 if ((buflen -= 12) < 0) 1501 goto out_resource; 1502 if (!aclsupport) 1503 word0 &= ~FATTR4_WORD0_ACL; 1504 if (!exp->ex_fslocs.locations) 1505 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1506 WRITE32(2); 1507 WRITE32(word0); 1508 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1509 } 1510 if (bmval0 & FATTR4_WORD0_TYPE) { 1511 if ((buflen -= 4) < 0) 1512 goto out_resource; 1513 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1514 if (dummy == NF4BAD) 1515 goto out_serverfault; 1516 WRITE32(dummy); 1517 } 1518 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1519 if ((buflen -= 4) < 0) 1520 goto out_resource; 1521 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1522 WRITE32(NFS4_FH_PERSISTENT); 1523 else 1524 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1525 } 1526 if (bmval0 & FATTR4_WORD0_CHANGE) { 1527 /* 1528 * Note: This _must_ be consistent with the scheme for writing 1529 * change_info, so any changes made here must be reflected there 1530 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1531 * macro above.) 1532 */ 1533 if ((buflen -= 8) < 0) 1534 goto out_resource; 1535 WRITE32(stat.ctime.tv_sec); 1536 WRITE32(stat.ctime.tv_nsec); 1537 } 1538 if (bmval0 & FATTR4_WORD0_SIZE) { 1539 if ((buflen -= 8) < 0) 1540 goto out_resource; 1541 WRITE64(stat.size); 1542 } 1543 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1544 if ((buflen -= 4) < 0) 1545 goto out_resource; 1546 WRITE32(1); 1547 } 1548 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1549 if ((buflen -= 4) < 0) 1550 goto out_resource; 1551 WRITE32(1); 1552 } 1553 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1554 if ((buflen -= 4) < 0) 1555 goto out_resource; 1556 WRITE32(0); 1557 } 1558 if (bmval0 & FATTR4_WORD0_FSID) { 1559 if ((buflen -= 16) < 0) 1560 goto out_resource; 1561 if (exp->ex_fslocs.migrated) { 1562 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1563 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1564 } else switch(fsid_source(fhp)) { 1565 case FSIDSOURCE_FSID: 1566 WRITE64((u64)exp->ex_fsid); 1567 WRITE64((u64)0); 1568 break; 1569 case FSIDSOURCE_DEV: 1570 WRITE32(0); 1571 WRITE32(MAJOR(stat.dev)); 1572 WRITE32(0); 1573 WRITE32(MINOR(stat.dev)); 1574 break; 1575 case FSIDSOURCE_UUID: 1576 WRITEMEM(exp->ex_uuid, 16); 1577 break; 1578 } 1579 } 1580 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1581 if ((buflen -= 4) < 0) 1582 goto out_resource; 1583 WRITE32(0); 1584 } 1585 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1586 if ((buflen -= 4) < 0) 1587 goto out_resource; 1588 WRITE32(NFSD_LEASE_TIME); 1589 } 1590 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1591 if ((buflen -= 4) < 0) 1592 goto out_resource; 1593 WRITE32(rdattr_err); 1594 } 1595 if (bmval0 & FATTR4_WORD0_ACL) { 1596 struct nfs4_ace *ace; 1597 1598 if (acl == NULL) { 1599 if ((buflen -= 4) < 0) 1600 goto out_resource; 1601 1602 WRITE32(0); 1603 goto out_acl; 1604 } 1605 if ((buflen -= 4) < 0) 1606 goto out_resource; 1607 WRITE32(acl->naces); 1608 1609 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1610 if ((buflen -= 4*3) < 0) 1611 goto out_resource; 1612 WRITE32(ace->type); 1613 WRITE32(ace->flag); 1614 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1615 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1616 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1617 &p, &buflen); 1618 if (status == nfserr_resource) 1619 goto out_resource; 1620 if (status) 1621 goto out; 1622 } 1623 } 1624 out_acl: 1625 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1626 if ((buflen -= 4) < 0) 1627 goto out_resource; 1628 WRITE32(aclsupport ? 1629 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1630 } 1631 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1632 if ((buflen -= 4) < 0) 1633 goto out_resource; 1634 WRITE32(1); 1635 } 1636 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1637 if ((buflen -= 4) < 0) 1638 goto out_resource; 1639 WRITE32(1); 1640 } 1641 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1642 if ((buflen -= 4) < 0) 1643 goto out_resource; 1644 WRITE32(1); 1645 } 1646 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1647 if ((buflen -= 4) < 0) 1648 goto out_resource; 1649 WRITE32(1); 1650 } 1651 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1652 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1653 if (buflen < 0) 1654 goto out_resource; 1655 WRITE32(fhp->fh_handle.fh_size); 1656 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1657 } 1658 if (bmval0 & FATTR4_WORD0_FILEID) { 1659 if ((buflen -= 8) < 0) 1660 goto out_resource; 1661 WRITE64((u64) stat.ino); 1662 } 1663 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1664 if ((buflen -= 8) < 0) 1665 goto out_resource; 1666 WRITE64((u64) statfs.f_ffree); 1667 } 1668 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1669 if ((buflen -= 8) < 0) 1670 goto out_resource; 1671 WRITE64((u64) statfs.f_ffree); 1672 } 1673 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1674 if ((buflen -= 8) < 0) 1675 goto out_resource; 1676 WRITE64((u64) statfs.f_files); 1677 } 1678 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1679 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1680 if (status == nfserr_resource) 1681 goto out_resource; 1682 if (status) 1683 goto out; 1684 } 1685 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1686 if ((buflen -= 4) < 0) 1687 goto out_resource; 1688 WRITE32(1); 1689 } 1690 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1691 if ((buflen -= 8) < 0) 1692 goto out_resource; 1693 WRITE64(~(u64)0); 1694 } 1695 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1696 if ((buflen -= 4) < 0) 1697 goto out_resource; 1698 WRITE32(255); 1699 } 1700 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1701 if ((buflen -= 4) < 0) 1702 goto out_resource; 1703 WRITE32(~(u32) 0); 1704 } 1705 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1706 if ((buflen -= 8) < 0) 1707 goto out_resource; 1708 WRITE64((u64) svc_max_payload(rqstp)); 1709 } 1710 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1711 if ((buflen -= 8) < 0) 1712 goto out_resource; 1713 WRITE64((u64) svc_max_payload(rqstp)); 1714 } 1715 if (bmval1 & FATTR4_WORD1_MODE) { 1716 if ((buflen -= 4) < 0) 1717 goto out_resource; 1718 WRITE32(stat.mode & S_IALLUGO); 1719 } 1720 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1721 if ((buflen -= 4) < 0) 1722 goto out_resource; 1723 WRITE32(1); 1724 } 1725 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1726 if ((buflen -= 4) < 0) 1727 goto out_resource; 1728 WRITE32(stat.nlink); 1729 } 1730 if (bmval1 & FATTR4_WORD1_OWNER) { 1731 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1732 if (status == nfserr_resource) 1733 goto out_resource; 1734 if (status) 1735 goto out; 1736 } 1737 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1738 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1739 if (status == nfserr_resource) 1740 goto out_resource; 1741 if (status) 1742 goto out; 1743 } 1744 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1745 if ((buflen -= 8) < 0) 1746 goto out_resource; 1747 WRITE32((u32) MAJOR(stat.rdev)); 1748 WRITE32((u32) MINOR(stat.rdev)); 1749 } 1750 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1751 if ((buflen -= 8) < 0) 1752 goto out_resource; 1753 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1754 WRITE64(dummy64); 1755 } 1756 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1757 if ((buflen -= 8) < 0) 1758 goto out_resource; 1759 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1760 WRITE64(dummy64); 1761 } 1762 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1763 if ((buflen -= 8) < 0) 1764 goto out_resource; 1765 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1766 WRITE64(dummy64); 1767 } 1768 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1769 if ((buflen -= 8) < 0) 1770 goto out_resource; 1771 dummy64 = (u64)stat.blocks << 9; 1772 WRITE64(dummy64); 1773 } 1774 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1775 if ((buflen -= 12) < 0) 1776 goto out_resource; 1777 WRITE32(0); 1778 WRITE32(stat.atime.tv_sec); 1779 WRITE32(stat.atime.tv_nsec); 1780 } 1781 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1782 if ((buflen -= 12) < 0) 1783 goto out_resource; 1784 WRITE32(0); 1785 WRITE32(1); 1786 WRITE32(0); 1787 } 1788 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1789 if ((buflen -= 12) < 0) 1790 goto out_resource; 1791 WRITE32(0); 1792 WRITE32(stat.ctime.tv_sec); 1793 WRITE32(stat.ctime.tv_nsec); 1794 } 1795 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1796 if ((buflen -= 12) < 0) 1797 goto out_resource; 1798 WRITE32(0); 1799 WRITE32(stat.mtime.tv_sec); 1800 WRITE32(stat.mtime.tv_nsec); 1801 } 1802 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1803 struct dentry *mnt_pnt, *mnt_root; 1804 1805 if ((buflen -= 8) < 0) 1806 goto out_resource; 1807 mnt_root = exp->ex_mnt->mnt_root; 1808 if (mnt_root->d_inode == dentry->d_inode) { 1809 mnt_pnt = exp->ex_mnt->mnt_mountpoint; 1810 WRITE64((u64) mnt_pnt->d_inode->i_ino); 1811 } else 1812 WRITE64((u64) stat.ino); 1813 } 1814 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1815 *countp = p - buffer; 1816 status = nfs_ok; 1817 1818 out: 1819 kfree(acl); 1820 if (fhp == &tempfh) 1821 fh_put(&tempfh); 1822 return status; 1823 out_nfserr: 1824 status = nfserrno(err); 1825 goto out; 1826 out_resource: 1827 *countp = 0; 1828 status = nfserr_resource; 1829 goto out; 1830 out_serverfault: 1831 status = nfserr_serverfault; 1832 goto out; 1833 } 1834 1835 static __be32 1836 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1837 const char *name, int namlen, __be32 *p, int *buflen) 1838 { 1839 struct svc_export *exp = cd->rd_fhp->fh_export; 1840 struct dentry *dentry; 1841 __be32 nfserr; 1842 1843 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1844 if (IS_ERR(dentry)) 1845 return nfserrno(PTR_ERR(dentry)); 1846 1847 exp_get(exp); 1848 if (d_mountpoint(dentry)) { 1849 int err; 1850 1851 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1852 if (err) { 1853 nfserr = nfserrno(err); 1854 goto out_put; 1855 } 1856 1857 } 1858 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1859 cd->rd_rqstp); 1860 out_put: 1861 dput(dentry); 1862 exp_put(exp); 1863 return nfserr; 1864 } 1865 1866 static __be32 * 1867 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1868 { 1869 __be32 *attrlenp; 1870 1871 if (buflen < 6) 1872 return NULL; 1873 *p++ = htonl(2); 1874 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1875 *p++ = htonl(0); /* bmval1 */ 1876 1877 attrlenp = p++; 1878 *p++ = nfserr; /* no htonl */ 1879 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1880 return p; 1881 } 1882 1883 static int 1884 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1885 loff_t offset, u64 ino, unsigned int d_type) 1886 { 1887 struct readdir_cd *ccd = ccdv; 1888 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1889 int buflen; 1890 __be32 *p = cd->buffer; 1891 __be32 nfserr = nfserr_toosmall; 1892 1893 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1894 if (name && isdotent(name, namlen)) { 1895 cd->common.err = nfs_ok; 1896 return 0; 1897 } 1898 1899 if (cd->offset) 1900 xdr_encode_hyper(cd->offset, (u64) offset); 1901 1902 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1903 if (buflen < 0) 1904 goto fail; 1905 1906 *p++ = xdr_one; /* mark entry present */ 1907 cd->offset = p; /* remember pointer */ 1908 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1909 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1910 1911 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1912 switch (nfserr) { 1913 case nfs_ok: 1914 p += buflen; 1915 break; 1916 case nfserr_resource: 1917 nfserr = nfserr_toosmall; 1918 goto fail; 1919 case nfserr_dropit: 1920 goto fail; 1921 default: 1922 /* 1923 * If the client requested the RDATTR_ERROR attribute, 1924 * we stuff the error code into this attribute 1925 * and continue. If this attribute was not requested, 1926 * then in accordance with the spec, we fail the 1927 * entire READDIR operation(!) 1928 */ 1929 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1930 goto fail; 1931 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1932 if (p == NULL) { 1933 nfserr = nfserr_toosmall; 1934 goto fail; 1935 } 1936 } 1937 cd->buflen -= (p - cd->buffer); 1938 cd->buffer = p; 1939 cd->common.err = nfs_ok; 1940 return 0; 1941 fail: 1942 cd->common.err = nfserr; 1943 return -EINVAL; 1944 } 1945 1946 static void 1947 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1948 { 1949 ENCODE_HEAD; 1950 1951 if (!nfserr) { 1952 RESERVE_SPACE(8); 1953 WRITE32(access->ac_supported); 1954 WRITE32(access->ac_resp_access); 1955 ADJUST_ARGS(); 1956 } 1957 } 1958 1959 static void 1960 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 1961 { 1962 ENCODE_SEQID_OP_HEAD; 1963 1964 if (!nfserr) { 1965 RESERVE_SPACE(sizeof(stateid_t)); 1966 WRITE32(close->cl_stateid.si_generation); 1967 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 1968 ADJUST_ARGS(); 1969 } 1970 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 1971 } 1972 1973 1974 static void 1975 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 1976 { 1977 ENCODE_HEAD; 1978 1979 if (!nfserr) { 1980 RESERVE_SPACE(8); 1981 WRITEMEM(commit->co_verf.data, 8); 1982 ADJUST_ARGS(); 1983 } 1984 } 1985 1986 static void 1987 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 1988 { 1989 ENCODE_HEAD; 1990 1991 if (!nfserr) { 1992 RESERVE_SPACE(32); 1993 WRITECINFO(create->cr_cinfo); 1994 WRITE32(2); 1995 WRITE32(create->cr_bmval[0]); 1996 WRITE32(create->cr_bmval[1]); 1997 ADJUST_ARGS(); 1998 } 1999 } 2000 2001 static __be32 2002 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2003 { 2004 struct svc_fh *fhp = getattr->ga_fhp; 2005 int buflen; 2006 2007 if (nfserr) 2008 return nfserr; 2009 2010 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2011 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2012 resp->p, &buflen, getattr->ga_bmval, 2013 resp->rqstp); 2014 if (!nfserr) 2015 resp->p += buflen; 2016 return nfserr; 2017 } 2018 2019 static void 2020 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2021 { 2022 unsigned int len; 2023 ENCODE_HEAD; 2024 2025 if (!nfserr) { 2026 len = fhp->fh_handle.fh_size; 2027 RESERVE_SPACE(len + 4); 2028 WRITE32(len); 2029 WRITEMEM(&fhp->fh_handle.fh_base, len); 2030 ADJUST_ARGS(); 2031 } 2032 } 2033 2034 /* 2035 * Including all fields other than the name, a LOCK4denied structure requires 2036 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2037 */ 2038 static void 2039 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2040 { 2041 ENCODE_HEAD; 2042 2043 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2044 WRITE64(ld->ld_start); 2045 WRITE64(ld->ld_length); 2046 WRITE32(ld->ld_type); 2047 if (ld->ld_sop) { 2048 WRITEMEM(&ld->ld_clientid, 8); 2049 WRITE32(ld->ld_sop->so_owner.len); 2050 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2051 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2052 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2053 WRITE64((u64)0); /* clientid */ 2054 WRITE32(0); /* length of owner name */ 2055 } 2056 ADJUST_ARGS(); 2057 } 2058 2059 static void 2060 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2061 { 2062 ENCODE_SEQID_OP_HEAD; 2063 2064 if (!nfserr) { 2065 RESERVE_SPACE(4 + sizeof(stateid_t)); 2066 WRITE32(lock->lk_resp_stateid.si_generation); 2067 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2068 ADJUST_ARGS(); 2069 } else if (nfserr == nfserr_denied) 2070 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2071 2072 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2073 } 2074 2075 static void 2076 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2077 { 2078 if (nfserr == nfserr_denied) 2079 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2080 } 2081 2082 static void 2083 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2084 { 2085 ENCODE_SEQID_OP_HEAD; 2086 2087 if (!nfserr) { 2088 RESERVE_SPACE(sizeof(stateid_t)); 2089 WRITE32(locku->lu_stateid.si_generation); 2090 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2091 ADJUST_ARGS(); 2092 } 2093 2094 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2095 } 2096 2097 2098 static void 2099 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2100 { 2101 ENCODE_HEAD; 2102 2103 if (!nfserr) { 2104 RESERVE_SPACE(20); 2105 WRITECINFO(link->li_cinfo); 2106 ADJUST_ARGS(); 2107 } 2108 } 2109 2110 2111 static void 2112 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2113 { 2114 ENCODE_SEQID_OP_HEAD; 2115 2116 if (nfserr) 2117 goto out; 2118 2119 RESERVE_SPACE(36 + sizeof(stateid_t)); 2120 WRITE32(open->op_stateid.si_generation); 2121 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2122 WRITECINFO(open->op_cinfo); 2123 WRITE32(open->op_rflags); 2124 WRITE32(2); 2125 WRITE32(open->op_bmval[0]); 2126 WRITE32(open->op_bmval[1]); 2127 WRITE32(open->op_delegate_type); 2128 ADJUST_ARGS(); 2129 2130 switch (open->op_delegate_type) { 2131 case NFS4_OPEN_DELEGATE_NONE: 2132 break; 2133 case NFS4_OPEN_DELEGATE_READ: 2134 RESERVE_SPACE(20 + sizeof(stateid_t)); 2135 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2136 WRITE32(open->op_recall); 2137 2138 /* 2139 * TODO: ACE's in delegations 2140 */ 2141 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2142 WRITE32(0); 2143 WRITE32(0); 2144 WRITE32(0); /* XXX: is NULL principal ok? */ 2145 ADJUST_ARGS(); 2146 break; 2147 case NFS4_OPEN_DELEGATE_WRITE: 2148 RESERVE_SPACE(32 + sizeof(stateid_t)); 2149 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2150 WRITE32(0); 2151 2152 /* 2153 * TODO: space_limit's in delegations 2154 */ 2155 WRITE32(NFS4_LIMIT_SIZE); 2156 WRITE32(~(u32)0); 2157 WRITE32(~(u32)0); 2158 2159 /* 2160 * TODO: ACE's in delegations 2161 */ 2162 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2163 WRITE32(0); 2164 WRITE32(0); 2165 WRITE32(0); /* XXX: is NULL principal ok? */ 2166 ADJUST_ARGS(); 2167 break; 2168 default: 2169 BUG(); 2170 } 2171 /* XXX save filehandle here */ 2172 out: 2173 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2174 } 2175 2176 static void 2177 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2178 { 2179 ENCODE_SEQID_OP_HEAD; 2180 2181 if (!nfserr) { 2182 RESERVE_SPACE(sizeof(stateid_t)); 2183 WRITE32(oc->oc_resp_stateid.si_generation); 2184 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2185 ADJUST_ARGS(); 2186 } 2187 2188 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2189 } 2190 2191 static void 2192 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2193 { 2194 ENCODE_SEQID_OP_HEAD; 2195 2196 if (!nfserr) { 2197 RESERVE_SPACE(sizeof(stateid_t)); 2198 WRITE32(od->od_stateid.si_generation); 2199 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2200 ADJUST_ARGS(); 2201 } 2202 2203 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2204 } 2205 2206 static __be32 2207 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2208 struct nfsd4_read *read) 2209 { 2210 u32 eof; 2211 int v, pn; 2212 unsigned long maxcount; 2213 long len; 2214 ENCODE_HEAD; 2215 2216 if (nfserr) 2217 return nfserr; 2218 if (resp->xbuf->page_len) 2219 return nfserr_resource; 2220 2221 RESERVE_SPACE(8); /* eof flag and byte count */ 2222 2223 maxcount = svc_max_payload(resp->rqstp); 2224 if (maxcount > read->rd_length) 2225 maxcount = read->rd_length; 2226 2227 len = maxcount; 2228 v = 0; 2229 while (len > 0) { 2230 pn = resp->rqstp->rq_resused++; 2231 resp->rqstp->rq_vec[v].iov_base = 2232 page_address(resp->rqstp->rq_respages[pn]); 2233 resp->rqstp->rq_vec[v].iov_len = 2234 len < PAGE_SIZE ? len : PAGE_SIZE; 2235 v++; 2236 len -= PAGE_SIZE; 2237 } 2238 read->rd_vlen = v; 2239 2240 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2241 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2242 &maxcount); 2243 2244 if (nfserr == nfserr_symlink) 2245 nfserr = nfserr_inval; 2246 if (nfserr) 2247 return nfserr; 2248 eof = (read->rd_offset + maxcount >= 2249 read->rd_fhp->fh_dentry->d_inode->i_size); 2250 2251 WRITE32(eof); 2252 WRITE32(maxcount); 2253 ADJUST_ARGS(); 2254 resp->xbuf->head[0].iov_len = (char*)p 2255 - (char*)resp->xbuf->head[0].iov_base; 2256 resp->xbuf->page_len = maxcount; 2257 2258 /* Use rest of head for padding and remaining ops: */ 2259 resp->xbuf->tail[0].iov_base = p; 2260 resp->xbuf->tail[0].iov_len = 0; 2261 if (maxcount&3) { 2262 RESERVE_SPACE(4); 2263 WRITE32(0); 2264 resp->xbuf->tail[0].iov_base += maxcount&3; 2265 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2266 ADJUST_ARGS(); 2267 } 2268 return 0; 2269 } 2270 2271 static __be32 2272 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2273 { 2274 int maxcount; 2275 char *page; 2276 ENCODE_HEAD; 2277 2278 if (nfserr) 2279 return nfserr; 2280 if (resp->xbuf->page_len) 2281 return nfserr_resource; 2282 2283 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2284 2285 maxcount = PAGE_SIZE; 2286 RESERVE_SPACE(4); 2287 2288 /* 2289 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2290 * if they would overflow the buffer. Is this kosher in NFSv4? If 2291 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2292 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2293 */ 2294 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2295 if (nfserr == nfserr_isdir) 2296 return nfserr_inval; 2297 if (nfserr) 2298 return nfserr; 2299 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_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2321 { 2322 int maxcount; 2323 loff_t offset; 2324 __be32 *page, *savep, *tailbase; 2325 ENCODE_HEAD; 2326 2327 if (nfserr) 2328 return nfserr; 2329 if (resp->xbuf->page_len) 2330 return nfserr_resource; 2331 2332 RESERVE_SPACE(8); /* verifier */ 2333 savep = p; 2334 2335 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2336 WRITE32(0); 2337 WRITE32(0); 2338 ADJUST_ARGS(); 2339 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2340 tailbase = p; 2341 2342 maxcount = PAGE_SIZE; 2343 if (maxcount > readdir->rd_maxcount) 2344 maxcount = readdir->rd_maxcount; 2345 2346 /* 2347 * Convert from bytes to words, account for the two words already 2348 * written, make sure to leave two words at the end for the next 2349 * pointer and eof field. 2350 */ 2351 maxcount = (maxcount >> 2) - 4; 2352 if (maxcount < 0) { 2353 nfserr = nfserr_toosmall; 2354 goto err_no_verf; 2355 } 2356 2357 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2358 readdir->common.err = 0; 2359 readdir->buflen = maxcount; 2360 readdir->buffer = page; 2361 readdir->offset = NULL; 2362 2363 offset = readdir->rd_cookie; 2364 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2365 &offset, 2366 &readdir->common, nfsd4_encode_dirent); 2367 if (nfserr == nfs_ok && 2368 readdir->common.err == nfserr_toosmall && 2369 readdir->buffer == page) 2370 nfserr = nfserr_toosmall; 2371 if (nfserr == nfserr_symlink) 2372 nfserr = nfserr_notdir; 2373 if (nfserr) 2374 goto err_no_verf; 2375 2376 if (readdir->offset) 2377 xdr_encode_hyper(readdir->offset, offset); 2378 2379 p = readdir->buffer; 2380 *p++ = 0; /* no more entries */ 2381 *p++ = htonl(readdir->common.err == nfserr_eof); 2382 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2383 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2384 2385 /* Use rest of head for padding and remaining ops: */ 2386 resp->xbuf->tail[0].iov_base = tailbase; 2387 resp->xbuf->tail[0].iov_len = 0; 2388 resp->p = resp->xbuf->tail[0].iov_base; 2389 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2390 2391 return 0; 2392 err_no_verf: 2393 p = savep; 2394 ADJUST_ARGS(); 2395 return nfserr; 2396 } 2397 2398 static void 2399 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2400 { 2401 ENCODE_HEAD; 2402 2403 if (!nfserr) { 2404 RESERVE_SPACE(20); 2405 WRITECINFO(remove->rm_cinfo); 2406 ADJUST_ARGS(); 2407 } 2408 } 2409 2410 static void 2411 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2412 { 2413 ENCODE_HEAD; 2414 2415 if (!nfserr) { 2416 RESERVE_SPACE(40); 2417 WRITECINFO(rename->rn_sinfo); 2418 WRITECINFO(rename->rn_tinfo); 2419 ADJUST_ARGS(); 2420 } 2421 } 2422 2423 /* 2424 * The SETATTR encode routine is special -- it always encodes a bitmap, 2425 * regardless of the error status. 2426 */ 2427 static void 2428 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2429 { 2430 ENCODE_HEAD; 2431 2432 RESERVE_SPACE(12); 2433 if (nfserr) { 2434 WRITE32(2); 2435 WRITE32(0); 2436 WRITE32(0); 2437 } 2438 else { 2439 WRITE32(2); 2440 WRITE32(setattr->sa_bmval[0]); 2441 WRITE32(setattr->sa_bmval[1]); 2442 } 2443 ADJUST_ARGS(); 2444 } 2445 2446 static void 2447 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2448 { 2449 ENCODE_HEAD; 2450 2451 if (!nfserr) { 2452 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2453 WRITEMEM(&scd->se_clientid, 8); 2454 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2455 ADJUST_ARGS(); 2456 } 2457 else if (nfserr == nfserr_clid_inuse) { 2458 RESERVE_SPACE(8); 2459 WRITE32(0); 2460 WRITE32(0); 2461 ADJUST_ARGS(); 2462 } 2463 } 2464 2465 static void 2466 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2467 { 2468 ENCODE_HEAD; 2469 2470 if (!nfserr) { 2471 RESERVE_SPACE(16); 2472 WRITE32(write->wr_bytes_written); 2473 WRITE32(write->wr_how_written); 2474 WRITEMEM(write->wr_verifier.data, 8); 2475 ADJUST_ARGS(); 2476 } 2477 } 2478 2479 void 2480 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2481 { 2482 __be32 *statp; 2483 ENCODE_HEAD; 2484 2485 RESERVE_SPACE(8); 2486 WRITE32(op->opnum); 2487 statp = p++; /* to be backfilled at the end */ 2488 ADJUST_ARGS(); 2489 2490 switch (op->opnum) { 2491 case OP_ACCESS: 2492 nfsd4_encode_access(resp, op->status, &op->u.access); 2493 break; 2494 case OP_CLOSE: 2495 nfsd4_encode_close(resp, op->status, &op->u.close); 2496 break; 2497 case OP_COMMIT: 2498 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2499 break; 2500 case OP_CREATE: 2501 nfsd4_encode_create(resp, op->status, &op->u.create); 2502 break; 2503 case OP_DELEGRETURN: 2504 break; 2505 case OP_GETATTR: 2506 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2507 break; 2508 case OP_GETFH: 2509 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2510 break; 2511 case OP_LINK: 2512 nfsd4_encode_link(resp, op->status, &op->u.link); 2513 break; 2514 case OP_LOCK: 2515 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2516 break; 2517 case OP_LOCKT: 2518 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2519 break; 2520 case OP_LOCKU: 2521 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2522 break; 2523 case OP_LOOKUP: 2524 break; 2525 case OP_LOOKUPP: 2526 break; 2527 case OP_NVERIFY: 2528 break; 2529 case OP_OPEN: 2530 nfsd4_encode_open(resp, op->status, &op->u.open); 2531 break; 2532 case OP_OPEN_CONFIRM: 2533 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2534 break; 2535 case OP_OPEN_DOWNGRADE: 2536 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2537 break; 2538 case OP_PUTFH: 2539 break; 2540 case OP_PUTROOTFH: 2541 break; 2542 case OP_READ: 2543 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2544 break; 2545 case OP_READDIR: 2546 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2547 break; 2548 case OP_READLINK: 2549 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2550 break; 2551 case OP_REMOVE: 2552 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2553 break; 2554 case OP_RENAME: 2555 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2556 break; 2557 case OP_RENEW: 2558 break; 2559 case OP_RESTOREFH: 2560 break; 2561 case OP_SAVEFH: 2562 break; 2563 case OP_SETATTR: 2564 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2565 break; 2566 case OP_SETCLIENTID: 2567 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2568 break; 2569 case OP_SETCLIENTID_CONFIRM: 2570 break; 2571 case OP_VERIFY: 2572 break; 2573 case OP_WRITE: 2574 nfsd4_encode_write(resp, op->status, &op->u.write); 2575 break; 2576 case OP_RELEASE_LOCKOWNER: 2577 break; 2578 default: 2579 break; 2580 } 2581 2582 /* 2583 * Note: We write the status directly, instead of using WRITE32(), 2584 * since it is already in network byte order. 2585 */ 2586 *statp = op->status; 2587 } 2588 2589 /* 2590 * Encode the reply stored in the stateowner reply cache 2591 * 2592 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2593 * previously sent already encoded operation. 2594 * 2595 * called with nfs4_lock_state() held 2596 */ 2597 void 2598 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2599 { 2600 ENCODE_HEAD; 2601 struct nfs4_replay *rp = op->replay; 2602 2603 BUG_ON(!rp); 2604 2605 RESERVE_SPACE(8); 2606 WRITE32(op->opnum); 2607 *p++ = rp->rp_status; /* already xdr'ed */ 2608 ADJUST_ARGS(); 2609 2610 RESERVE_SPACE(rp->rp_buflen); 2611 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2612 ADJUST_ARGS(); 2613 } 2614 2615 /* 2616 * END OF "GENERIC" ENCODE ROUTINES. 2617 */ 2618 2619 int 2620 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2621 { 2622 return xdr_ressize_check(rqstp, p); 2623 } 2624 2625 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2626 { 2627 if (args->ops != args->iops) { 2628 kfree(args->ops); 2629 args->ops = args->iops; 2630 } 2631 kfree(args->tmpp); 2632 args->tmpp = NULL; 2633 while (args->to_free) { 2634 struct tmpbuf *tb = args->to_free; 2635 args->to_free = tb->next; 2636 tb->release(tb->buf); 2637 kfree(tb); 2638 } 2639 } 2640 2641 int 2642 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2643 { 2644 __be32 status; 2645 2646 args->p = p; 2647 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2648 args->pagelist = rqstp->rq_arg.pages; 2649 args->pagelen = rqstp->rq_arg.page_len; 2650 args->tmpp = NULL; 2651 args->to_free = NULL; 2652 args->ops = args->iops; 2653 args->rqstp = rqstp; 2654 2655 status = nfsd4_decode_compound(args); 2656 if (status) { 2657 nfsd4_release_compoundargs(args); 2658 } 2659 return !status; 2660 } 2661 2662 int 2663 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2664 { 2665 /* 2666 * All that remains is to write the tag and operation count... 2667 */ 2668 struct kvec *iov; 2669 p = resp->tagp; 2670 *p++ = htonl(resp->taglen); 2671 memcpy(p, resp->tag, resp->taglen); 2672 p += XDR_QUADLEN(resp->taglen); 2673 *p++ = htonl(resp->opcnt); 2674 2675 if (rqstp->rq_res.page_len) 2676 iov = &rqstp->rq_res.tail[0]; 2677 else 2678 iov = &rqstp->rq_res.head[0]; 2679 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2680 BUG_ON(iov->iov_len > PAGE_SIZE); 2681 return 1; 2682 } 2683 2684 /* 2685 * Local variables: 2686 * c-basic-offset: 8 2687 * End: 2688 */ 2689