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 void *new = NULL; 203 if (p == argp->tmp) { 204 new = kmalloc(nbytes, GFP_KERNEL); 205 if (!new) return NULL; 206 p = new; 207 memcpy(p, argp->tmp, nbytes); 208 } else { 209 BUG_ON(p != argp->tmpp); 210 argp->tmpp = NULL; 211 } 212 if (defer_free(argp, kfree, p)) { 213 kfree(new); 214 return NULL; 215 } else 216 return (char *)p; 217 } 218 219 220 static __be32 221 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 222 { 223 u32 bmlen; 224 DECODE_HEAD; 225 226 bmval[0] = 0; 227 bmval[1] = 0; 228 229 READ_BUF(4); 230 READ32(bmlen); 231 if (bmlen > 1000) 232 goto xdr_error; 233 234 READ_BUF(bmlen << 2); 235 if (bmlen > 0) 236 READ32(bmval[0]); 237 if (bmlen > 1) 238 READ32(bmval[1]); 239 240 DECODE_TAIL; 241 } 242 243 static __be32 244 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 245 struct nfs4_acl **acl) 246 { 247 int expected_len, len = 0; 248 u32 dummy32; 249 char *buf; 250 int host_err; 251 252 DECODE_HEAD; 253 iattr->ia_valid = 0; 254 if ((status = nfsd4_decode_bitmap(argp, bmval))) 255 return status; 256 257 /* 258 * According to spec, unsupported attributes return ERR_NOTSUPP; 259 * read-only attributes return ERR_INVAL. 260 */ 261 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 262 return nfserr_attrnotsupp; 263 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 264 return nfserr_inval; 265 266 READ_BUF(4); 267 READ32(expected_len); 268 269 if (bmval[0] & FATTR4_WORD0_SIZE) { 270 READ_BUF(8); 271 len += 8; 272 READ64(iattr->ia_size); 273 iattr->ia_valid |= ATTR_SIZE; 274 } 275 if (bmval[0] & FATTR4_WORD0_ACL) { 276 int nace, i; 277 struct nfs4_ace ace; 278 279 READ_BUF(4); len += 4; 280 READ32(nace); 281 282 *acl = nfs4_acl_new(); 283 if (*acl == NULL) { 284 host_err = -ENOMEM; 285 goto out_nfserr; 286 } 287 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl); 288 289 for (i = 0; i < nace; i++) { 290 READ_BUF(16); len += 16; 291 READ32(ace.type); 292 READ32(ace.flag); 293 READ32(ace.access_mask); 294 READ32(dummy32); 295 READ_BUF(dummy32); 296 len += XDR_QUADLEN(dummy32) << 2; 297 READMEM(buf, dummy32); 298 ace.whotype = nfs4_acl_get_whotype(buf, dummy32); 299 host_err = 0; 300 if (ace.whotype != NFS4_ACL_WHO_NAMED) 301 ace.who = 0; 302 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP) 303 host_err = nfsd_map_name_to_gid(argp->rqstp, 304 buf, dummy32, &ace.who); 305 else 306 host_err = nfsd_map_name_to_uid(argp->rqstp, 307 buf, dummy32, &ace.who); 308 if (host_err) 309 goto out_nfserr; 310 host_err = nfs4_acl_add_ace(*acl, ace.type, ace.flag, 311 ace.access_mask, ace.whotype, ace.who); 312 if (host_err) 313 goto out_nfserr; 314 } 315 } else 316 *acl = NULL; 317 if (bmval[1] & FATTR4_WORD1_MODE) { 318 READ_BUF(4); 319 len += 4; 320 READ32(iattr->ia_mode); 321 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 322 iattr->ia_valid |= ATTR_MODE; 323 } 324 if (bmval[1] & FATTR4_WORD1_OWNER) { 325 READ_BUF(4); 326 len += 4; 327 READ32(dummy32); 328 READ_BUF(dummy32); 329 len += (XDR_QUADLEN(dummy32) << 2); 330 READMEM(buf, dummy32); 331 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 332 goto out_nfserr; 333 iattr->ia_valid |= ATTR_UID; 334 } 335 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 336 READ_BUF(4); 337 len += 4; 338 READ32(dummy32); 339 READ_BUF(dummy32); 340 len += (XDR_QUADLEN(dummy32) << 2); 341 READMEM(buf, dummy32); 342 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 343 goto out_nfserr; 344 iattr->ia_valid |= ATTR_GID; 345 } 346 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 347 READ_BUF(4); 348 len += 4; 349 READ32(dummy32); 350 switch (dummy32) { 351 case NFS4_SET_TO_CLIENT_TIME: 352 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 353 all 32 bits of 'nseconds'. */ 354 READ_BUF(12); 355 len += 12; 356 READ32(dummy32); 357 if (dummy32) 358 return nfserr_inval; 359 READ32(iattr->ia_atime.tv_sec); 360 READ32(iattr->ia_atime.tv_nsec); 361 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 362 return nfserr_inval; 363 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 364 break; 365 case NFS4_SET_TO_SERVER_TIME: 366 iattr->ia_valid |= ATTR_ATIME; 367 break; 368 default: 369 goto xdr_error; 370 } 371 } 372 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { 373 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 374 all 32 bits of 'nseconds'. */ 375 READ_BUF(12); 376 len += 12; 377 READ32(dummy32); 378 if (dummy32) 379 return nfserr_inval; 380 READ32(iattr->ia_ctime.tv_sec); 381 READ32(iattr->ia_ctime.tv_nsec); 382 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) 383 return nfserr_inval; 384 iattr->ia_valid |= ATTR_CTIME; 385 } 386 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 387 READ_BUF(4); 388 len += 4; 389 READ32(dummy32); 390 switch (dummy32) { 391 case NFS4_SET_TO_CLIENT_TIME: 392 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 393 all 32 bits of 'nseconds'. */ 394 READ_BUF(12); 395 len += 12; 396 READ32(dummy32); 397 if (dummy32) 398 return nfserr_inval; 399 READ32(iattr->ia_mtime.tv_sec); 400 READ32(iattr->ia_mtime.tv_nsec); 401 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 402 return nfserr_inval; 403 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 404 break; 405 case NFS4_SET_TO_SERVER_TIME: 406 iattr->ia_valid |= ATTR_MTIME; 407 break; 408 default: 409 goto xdr_error; 410 } 411 } 412 if (len != expected_len) 413 goto xdr_error; 414 415 DECODE_TAIL; 416 417 out_nfserr: 418 status = nfserrno(host_err); 419 goto out; 420 } 421 422 static __be32 423 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 424 { 425 DECODE_HEAD; 426 427 READ_BUF(4); 428 READ32(access->ac_req_access); 429 430 DECODE_TAIL; 431 } 432 433 static __be32 434 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 435 { 436 DECODE_HEAD; 437 438 close->cl_stateowner = NULL; 439 READ_BUF(4 + sizeof(stateid_t)); 440 READ32(close->cl_seqid); 441 READ32(close->cl_stateid.si_generation); 442 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 443 444 DECODE_TAIL; 445 } 446 447 448 static __be32 449 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 450 { 451 DECODE_HEAD; 452 453 READ_BUF(12); 454 READ64(commit->co_offset); 455 READ32(commit->co_count); 456 457 DECODE_TAIL; 458 } 459 460 static __be32 461 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 462 { 463 DECODE_HEAD; 464 465 READ_BUF(4); 466 READ32(create->cr_type); 467 switch (create->cr_type) { 468 case NF4LNK: 469 READ_BUF(4); 470 READ32(create->cr_linklen); 471 READ_BUF(create->cr_linklen); 472 SAVEMEM(create->cr_linkname, create->cr_linklen); 473 break; 474 case NF4BLK: 475 case NF4CHR: 476 READ_BUF(8); 477 READ32(create->cr_specdata1); 478 READ32(create->cr_specdata2); 479 break; 480 case NF4SOCK: 481 case NF4FIFO: 482 case NF4DIR: 483 default: 484 break; 485 } 486 487 READ_BUF(4); 488 READ32(create->cr_namelen); 489 READ_BUF(create->cr_namelen); 490 SAVEMEM(create->cr_name, create->cr_namelen); 491 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 492 return status; 493 494 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 495 goto out; 496 497 DECODE_TAIL; 498 } 499 500 static inline __be32 501 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 502 { 503 DECODE_HEAD; 504 505 READ_BUF(sizeof(stateid_t)); 506 READ32(dr->dr_stateid.si_generation); 507 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 508 509 DECODE_TAIL; 510 } 511 512 static inline __be32 513 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 514 { 515 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 516 } 517 518 static __be32 519 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 520 { 521 DECODE_HEAD; 522 523 READ_BUF(4); 524 READ32(link->li_namelen); 525 READ_BUF(link->li_namelen); 526 SAVEMEM(link->li_name, link->li_namelen); 527 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 528 return status; 529 530 DECODE_TAIL; 531 } 532 533 static __be32 534 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 535 { 536 DECODE_HEAD; 537 538 lock->lk_replay_owner = NULL; 539 /* 540 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 541 */ 542 READ_BUF(28); 543 READ32(lock->lk_type); 544 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 545 goto xdr_error; 546 READ32(lock->lk_reclaim); 547 READ64(lock->lk_offset); 548 READ64(lock->lk_length); 549 READ32(lock->lk_is_new); 550 551 if (lock->lk_is_new) { 552 READ_BUF(36); 553 READ32(lock->lk_new_open_seqid); 554 READ32(lock->lk_new_open_stateid.si_generation); 555 556 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 557 READ32(lock->lk_new_lock_seqid); 558 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 559 READ32(lock->lk_new_owner.len); 560 READ_BUF(lock->lk_new_owner.len); 561 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 562 } else { 563 READ_BUF(20); 564 READ32(lock->lk_old_lock_stateid.si_generation); 565 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 566 READ32(lock->lk_old_lock_seqid); 567 } 568 569 DECODE_TAIL; 570 } 571 572 static __be32 573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 574 { 575 DECODE_HEAD; 576 577 READ_BUF(32); 578 READ32(lockt->lt_type); 579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 580 goto xdr_error; 581 READ64(lockt->lt_offset); 582 READ64(lockt->lt_length); 583 COPYMEM(&lockt->lt_clientid, 8); 584 READ32(lockt->lt_owner.len); 585 READ_BUF(lockt->lt_owner.len); 586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 587 588 DECODE_TAIL; 589 } 590 591 static __be32 592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 593 { 594 DECODE_HEAD; 595 596 locku->lu_stateowner = NULL; 597 READ_BUF(24 + sizeof(stateid_t)); 598 READ32(locku->lu_type); 599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 600 goto xdr_error; 601 READ32(locku->lu_seqid); 602 READ32(locku->lu_stateid.si_generation); 603 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 604 READ64(locku->lu_offset); 605 READ64(locku->lu_length); 606 607 DECODE_TAIL; 608 } 609 610 static __be32 611 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 612 { 613 DECODE_HEAD; 614 615 READ_BUF(4); 616 READ32(lookup->lo_len); 617 READ_BUF(lookup->lo_len); 618 SAVEMEM(lookup->lo_name, lookup->lo_len); 619 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 620 return status; 621 622 DECODE_TAIL; 623 } 624 625 static __be32 626 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 627 { 628 DECODE_HEAD; 629 630 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 631 open->op_iattr.ia_valid = 0; 632 open->op_stateowner = NULL; 633 634 /* seqid, share_access, share_deny, clientid, ownerlen */ 635 READ_BUF(16 + sizeof(clientid_t)); 636 READ32(open->op_seqid); 637 READ32(open->op_share_access); 638 READ32(open->op_share_deny); 639 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 640 READ32(open->op_owner.len); 641 642 /* owner, open_flag */ 643 READ_BUF(open->op_owner.len + 4); 644 SAVEMEM(open->op_owner.data, open->op_owner.len); 645 READ32(open->op_create); 646 switch (open->op_create) { 647 case NFS4_OPEN_NOCREATE: 648 break; 649 case NFS4_OPEN_CREATE: 650 READ_BUF(4); 651 READ32(open->op_createmode); 652 switch (open->op_createmode) { 653 case NFS4_CREATE_UNCHECKED: 654 case NFS4_CREATE_GUARDED: 655 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 656 goto out; 657 break; 658 case NFS4_CREATE_EXCLUSIVE: 659 READ_BUF(8); 660 COPYMEM(open->op_verf.data, 8); 661 break; 662 default: 663 goto xdr_error; 664 } 665 break; 666 default: 667 goto xdr_error; 668 } 669 670 /* open_claim */ 671 READ_BUF(4); 672 READ32(open->op_claim_type); 673 switch (open->op_claim_type) { 674 case NFS4_OPEN_CLAIM_NULL: 675 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 676 READ_BUF(4); 677 READ32(open->op_fname.len); 678 READ_BUF(open->op_fname.len); 679 SAVEMEM(open->op_fname.data, open->op_fname.len); 680 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 681 return status; 682 break; 683 case NFS4_OPEN_CLAIM_PREVIOUS: 684 READ_BUF(4); 685 READ32(open->op_delegate_type); 686 break; 687 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 688 READ_BUF(sizeof(stateid_t) + 4); 689 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 690 READ32(open->op_fname.len); 691 READ_BUF(open->op_fname.len); 692 SAVEMEM(open->op_fname.data, open->op_fname.len); 693 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 694 return status; 695 break; 696 default: 697 goto xdr_error; 698 } 699 700 DECODE_TAIL; 701 } 702 703 static __be32 704 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 705 { 706 DECODE_HEAD; 707 708 open_conf->oc_stateowner = NULL; 709 READ_BUF(4 + sizeof(stateid_t)); 710 READ32(open_conf->oc_req_stateid.si_generation); 711 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 712 READ32(open_conf->oc_seqid); 713 714 DECODE_TAIL; 715 } 716 717 static __be32 718 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 719 { 720 DECODE_HEAD; 721 722 open_down->od_stateowner = NULL; 723 READ_BUF(12 + sizeof(stateid_t)); 724 READ32(open_down->od_stateid.si_generation); 725 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 726 READ32(open_down->od_seqid); 727 READ32(open_down->od_share_access); 728 READ32(open_down->od_share_deny); 729 730 DECODE_TAIL; 731 } 732 733 static __be32 734 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 735 { 736 DECODE_HEAD; 737 738 READ_BUF(4); 739 READ32(putfh->pf_fhlen); 740 if (putfh->pf_fhlen > NFS4_FHSIZE) 741 goto xdr_error; 742 READ_BUF(putfh->pf_fhlen); 743 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 744 745 DECODE_TAIL; 746 } 747 748 static __be32 749 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 750 { 751 DECODE_HEAD; 752 753 READ_BUF(sizeof(stateid_t) + 12); 754 READ32(read->rd_stateid.si_generation); 755 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 756 READ64(read->rd_offset); 757 READ32(read->rd_length); 758 759 DECODE_TAIL; 760 } 761 762 static __be32 763 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 764 { 765 DECODE_HEAD; 766 767 READ_BUF(24); 768 READ64(readdir->rd_cookie); 769 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 770 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 771 READ32(readdir->rd_maxcount); 772 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 773 goto out; 774 775 DECODE_TAIL; 776 } 777 778 static __be32 779 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 780 { 781 DECODE_HEAD; 782 783 READ_BUF(4); 784 READ32(remove->rm_namelen); 785 READ_BUF(remove->rm_namelen); 786 SAVEMEM(remove->rm_name, remove->rm_namelen); 787 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 788 return status; 789 790 DECODE_TAIL; 791 } 792 793 static __be32 794 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 795 { 796 DECODE_HEAD; 797 798 READ_BUF(4); 799 READ32(rename->rn_snamelen); 800 READ_BUF(rename->rn_snamelen + 4); 801 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 802 READ32(rename->rn_tnamelen); 803 READ_BUF(rename->rn_tnamelen); 804 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 805 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 806 return status; 807 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 808 return status; 809 810 DECODE_TAIL; 811 } 812 813 static __be32 814 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 815 { 816 DECODE_HEAD; 817 818 READ_BUF(sizeof(clientid_t)); 819 COPYMEM(clientid, sizeof(clientid_t)); 820 821 DECODE_TAIL; 822 } 823 824 static __be32 825 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 826 { 827 DECODE_HEAD; 828 829 READ_BUF(sizeof(stateid_t)); 830 READ32(setattr->sa_stateid.si_generation); 831 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 832 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 833 goto out; 834 835 DECODE_TAIL; 836 } 837 838 static __be32 839 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 840 { 841 DECODE_HEAD; 842 843 READ_BUF(12); 844 COPYMEM(setclientid->se_verf.data, 8); 845 READ32(setclientid->se_namelen); 846 847 READ_BUF(setclientid->se_namelen + 8); 848 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 849 READ32(setclientid->se_callback_prog); 850 READ32(setclientid->se_callback_netid_len); 851 852 READ_BUF(setclientid->se_callback_netid_len + 4); 853 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 854 READ32(setclientid->se_callback_addr_len); 855 856 READ_BUF(setclientid->se_callback_addr_len + 4); 857 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 858 READ32(setclientid->se_callback_ident); 859 860 DECODE_TAIL; 861 } 862 863 static __be32 864 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 865 { 866 DECODE_HEAD; 867 868 READ_BUF(8 + sizeof(nfs4_verifier)); 869 COPYMEM(&scd_c->sc_clientid, 8); 870 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 871 872 DECODE_TAIL; 873 } 874 875 /* Also used for NVERIFY */ 876 static __be32 877 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 878 { 879 #if 0 880 struct nfsd4_compoundargs save = { 881 .p = argp->p, 882 .end = argp->end, 883 .rqstp = argp->rqstp, 884 }; 885 u32 ve_bmval[2]; 886 struct iattr ve_iattr; /* request */ 887 struct nfs4_acl *ve_acl; /* request */ 888 #endif 889 DECODE_HEAD; 890 891 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 892 goto out; 893 894 /* For convenience's sake, we compare raw xdr'd attributes in 895 * nfsd4_proc_verify; however we still decode here just to return 896 * correct error in case of bad xdr. */ 897 #if 0 898 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 899 if (status == nfserr_inval) { 900 status = nfserrno(status); 901 goto out; 902 } 903 #endif 904 READ_BUF(4); 905 READ32(verify->ve_attrlen); 906 READ_BUF(verify->ve_attrlen); 907 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 908 909 DECODE_TAIL; 910 } 911 912 static __be32 913 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 914 { 915 int avail; 916 int v; 917 int len; 918 DECODE_HEAD; 919 920 READ_BUF(sizeof(stateid_opaque_t) + 20); 921 READ32(write->wr_stateid.si_generation); 922 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 923 READ64(write->wr_offset); 924 READ32(write->wr_stable_how); 925 if (write->wr_stable_how > 2) 926 goto xdr_error; 927 READ32(write->wr_buflen); 928 929 /* Sorry .. no magic macros for this.. * 930 * READ_BUF(write->wr_buflen); 931 * SAVEMEM(write->wr_buf, write->wr_buflen); 932 */ 933 avail = (char*)argp->end - (char*)argp->p; 934 if (avail + argp->pagelen < write->wr_buflen) { 935 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); 936 goto xdr_error; 937 } 938 argp->rqstp->rq_vec[0].iov_base = p; 939 argp->rqstp->rq_vec[0].iov_len = avail; 940 v = 0; 941 len = write->wr_buflen; 942 while (len > argp->rqstp->rq_vec[v].iov_len) { 943 len -= argp->rqstp->rq_vec[v].iov_len; 944 v++; 945 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 946 argp->pagelist++; 947 if (argp->pagelen >= PAGE_SIZE) { 948 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 949 argp->pagelen -= PAGE_SIZE; 950 } else { 951 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 952 argp->pagelen -= len; 953 } 954 } 955 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 956 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 957 argp->rqstp->rq_vec[v].iov_len = len; 958 write->wr_vlen = v+1; 959 960 DECODE_TAIL; 961 } 962 963 static __be32 964 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 965 { 966 DECODE_HEAD; 967 968 READ_BUF(12); 969 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 970 READ32(rlockowner->rl_owner.len); 971 READ_BUF(rlockowner->rl_owner.len); 972 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 973 974 DECODE_TAIL; 975 } 976 977 static __be32 978 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 979 { 980 DECODE_HEAD; 981 struct nfsd4_op *op; 982 int i; 983 984 /* 985 * XXX: According to spec, we should check the tag 986 * for UTF-8 compliance. I'm postponing this for 987 * now because it seems that some clients do use 988 * binary tags. 989 */ 990 READ_BUF(4); 991 READ32(argp->taglen); 992 READ_BUF(argp->taglen + 8); 993 SAVEMEM(argp->tag, argp->taglen); 994 READ32(argp->minorversion); 995 READ32(argp->opcnt); 996 997 if (argp->taglen > NFSD4_MAX_TAGLEN) 998 goto xdr_error; 999 if (argp->opcnt > 100) 1000 goto xdr_error; 1001 1002 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1003 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1004 if (!argp->ops) { 1005 argp->ops = argp->iops; 1006 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n"); 1007 goto xdr_error; 1008 } 1009 } 1010 1011 for (i = 0; i < argp->opcnt; i++) { 1012 op = &argp->ops[i]; 1013 op->replay = NULL; 1014 1015 /* 1016 * We can't use READ_BUF() here because we need to handle 1017 * a missing opcode as an OP_WRITE + 1. So we need to check 1018 * to see if we're truly at the end of our buffer or if there 1019 * is another page we need to flip to. 1020 */ 1021 1022 if (argp->p == argp->end) { 1023 if (argp->pagelen < 4) { 1024 /* There isn't an opcode still on the wire */ 1025 op->opnum = OP_WRITE + 1; 1026 op->status = nfserr_bad_xdr; 1027 argp->opcnt = i+1; 1028 break; 1029 } 1030 1031 /* 1032 * False alarm. We just hit a page boundary, but there 1033 * is still data available. Move pointer across page 1034 * boundary. *snip from READ_BUF* 1035 */ 1036 argp->p = page_address(argp->pagelist[0]); 1037 argp->pagelist++; 1038 if (argp->pagelen < PAGE_SIZE) { 1039 argp->end = p + (argp->pagelen>>2); 1040 argp->pagelen = 0; 1041 } else { 1042 argp->end = p + (PAGE_SIZE>>2); 1043 argp->pagelen -= PAGE_SIZE; 1044 } 1045 } 1046 op->opnum = ntohl(*argp->p++); 1047 1048 switch (op->opnum) { 1049 case 2: /* Reserved operation */ 1050 op->opnum = OP_ILLEGAL; 1051 if (argp->minorversion == 0) 1052 op->status = nfserr_op_illegal; 1053 else 1054 op->status = nfserr_minor_vers_mismatch; 1055 break; 1056 case OP_ACCESS: 1057 op->status = nfsd4_decode_access(argp, &op->u.access); 1058 break; 1059 case OP_CLOSE: 1060 op->status = nfsd4_decode_close(argp, &op->u.close); 1061 break; 1062 case OP_COMMIT: 1063 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1064 break; 1065 case OP_CREATE: 1066 op->status = nfsd4_decode_create(argp, &op->u.create); 1067 break; 1068 case OP_DELEGRETURN: 1069 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1070 break; 1071 case OP_GETATTR: 1072 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1073 break; 1074 case OP_GETFH: 1075 op->status = nfs_ok; 1076 break; 1077 case OP_LINK: 1078 op->status = nfsd4_decode_link(argp, &op->u.link); 1079 break; 1080 case OP_LOCK: 1081 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1082 break; 1083 case OP_LOCKT: 1084 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1085 break; 1086 case OP_LOCKU: 1087 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1088 break; 1089 case OP_LOOKUP: 1090 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1091 break; 1092 case OP_LOOKUPP: 1093 op->status = nfs_ok; 1094 break; 1095 case OP_NVERIFY: 1096 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1097 break; 1098 case OP_OPEN: 1099 op->status = nfsd4_decode_open(argp, &op->u.open); 1100 break; 1101 case OP_OPEN_CONFIRM: 1102 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1103 break; 1104 case OP_OPEN_DOWNGRADE: 1105 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1106 break; 1107 case OP_PUTFH: 1108 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1109 break; 1110 case OP_PUTROOTFH: 1111 op->status = nfs_ok; 1112 break; 1113 case OP_READ: 1114 op->status = nfsd4_decode_read(argp, &op->u.read); 1115 break; 1116 case OP_READDIR: 1117 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1118 break; 1119 case OP_READLINK: 1120 op->status = nfs_ok; 1121 break; 1122 case OP_REMOVE: 1123 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1124 break; 1125 case OP_RENAME: 1126 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1127 break; 1128 case OP_RESTOREFH: 1129 op->status = nfs_ok; 1130 break; 1131 case OP_RENEW: 1132 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1133 break; 1134 case OP_SAVEFH: 1135 op->status = nfs_ok; 1136 break; 1137 case OP_SETATTR: 1138 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1139 break; 1140 case OP_SETCLIENTID: 1141 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1142 break; 1143 case OP_SETCLIENTID_CONFIRM: 1144 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1145 break; 1146 case OP_VERIFY: 1147 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1148 break; 1149 case OP_WRITE: 1150 op->status = nfsd4_decode_write(argp, &op->u.write); 1151 break; 1152 case OP_RELEASE_LOCKOWNER: 1153 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1154 break; 1155 default: 1156 op->opnum = OP_ILLEGAL; 1157 op->status = nfserr_op_illegal; 1158 break; 1159 } 1160 1161 if (op->status) { 1162 argp->opcnt = i+1; 1163 break; 1164 } 1165 } 1166 1167 DECODE_TAIL; 1168 } 1169 /* 1170 * END OF "GENERIC" DECODE ROUTINES. 1171 */ 1172 1173 /* 1174 * START OF "GENERIC" ENCODE ROUTINES. 1175 * These may look a little ugly since they are imported from a "generic" 1176 * set of XDR encode/decode routines which are intended to be shared by 1177 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1178 * 1179 * If the pain of reading these is too great, it should be a straightforward 1180 * task to translate them into Linux-specific versions which are more 1181 * consistent with the style used in NFSv2/v3... 1182 */ 1183 #define ENCODE_HEAD __be32 *p 1184 1185 #define WRITE32(n) *p++ = htonl(n) 1186 #define WRITE64(n) do { \ 1187 *p++ = htonl((u32)((n) >> 32)); \ 1188 *p++ = htonl((u32)(n)); \ 1189 } while (0) 1190 #define WRITEMEM(ptr,nbytes) do { \ 1191 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1192 memcpy(p, ptr, nbytes); \ 1193 p += XDR_QUADLEN(nbytes); \ 1194 } while (0) 1195 #define WRITECINFO(c) do { \ 1196 *p++ = htonl(c.atomic); \ 1197 *p++ = htonl(c.before_ctime_sec); \ 1198 *p++ = htonl(c.before_ctime_nsec); \ 1199 *p++ = htonl(c.after_ctime_sec); \ 1200 *p++ = htonl(c.after_ctime_nsec); \ 1201 } while (0) 1202 1203 #define RESERVE_SPACE(nbytes) do { \ 1204 p = resp->p; \ 1205 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1206 } while (0) 1207 #define ADJUST_ARGS() resp->p = p 1208 1209 /* 1210 * Header routine to setup seqid operation replay cache 1211 */ 1212 #define ENCODE_SEQID_OP_HEAD \ 1213 __be32 *p; \ 1214 __be32 *save; \ 1215 \ 1216 save = resp->p; 1217 1218 /* 1219 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1220 * is where sequence id's are incremented, and the replay cache is filled. 1221 * Note that we increment sequence id's here, at the last moment, so we're sure 1222 * we know whether the error to be returned is a sequence id mutating error. 1223 */ 1224 1225 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1226 if (seqid_mutating_err(nfserr) && stateowner) { \ 1227 stateowner->so_seqid++; \ 1228 stateowner->so_replay.rp_status = nfserr; \ 1229 stateowner->so_replay.rp_buflen = \ 1230 (((char *)(resp)->p - (char *)save)); \ 1231 memcpy(stateowner->so_replay.rp_buf, save, \ 1232 stateowner->so_replay.rp_buflen); \ 1233 } } while (0); 1234 1235 /* Encode as an array of strings the string given with components 1236 * seperated @sep. 1237 */ 1238 static __be32 nfsd4_encode_components(char sep, char *components, 1239 __be32 **pp, int *buflen) 1240 { 1241 __be32 *p = *pp; 1242 __be32 *countp = p; 1243 int strlen, count=0; 1244 char *str, *end; 1245 1246 dprintk("nfsd4_encode_components(%s)\n", components); 1247 if ((*buflen -= 4) < 0) 1248 return nfserr_resource; 1249 WRITE32(0); /* We will fill this in with @count later */ 1250 end = str = components; 1251 while (*end) { 1252 for (; *end && (*end != sep); end++) 1253 ; /* Point to end of component */ 1254 strlen = end - str; 1255 if (strlen) { 1256 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1257 return nfserr_resource; 1258 WRITE32(strlen); 1259 WRITEMEM(str, strlen); 1260 count++; 1261 } 1262 else 1263 end++; 1264 str = end; 1265 } 1266 *pp = p; 1267 p = countp; 1268 WRITE32(count); 1269 return 0; 1270 } 1271 1272 /* 1273 * encode a location element of a fs_locations structure 1274 */ 1275 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1276 __be32 **pp, int *buflen) 1277 { 1278 __be32 status; 1279 __be32 *p = *pp; 1280 1281 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1282 if (status) 1283 return status; 1284 status = nfsd4_encode_components('/', location->path, &p, buflen); 1285 if (status) 1286 return status; 1287 *pp = p; 1288 return 0; 1289 } 1290 1291 /* 1292 * Return the path to an export point in the pseudo filesystem namespace 1293 * Returned string is safe to use as long as the caller holds a reference 1294 * to @exp. 1295 */ 1296 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1297 { 1298 struct svc_fh tmp_fh; 1299 char *path, *rootpath; 1300 1301 fh_init(&tmp_fh, NFS4_FHSIZE); 1302 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle); 1303 if (*stat) 1304 return NULL; 1305 rootpath = tmp_fh.fh_export->ex_path; 1306 1307 path = exp->ex_path; 1308 1309 if (strncmp(path, rootpath, strlen(rootpath))) { 1310 printk("nfsd: fs_locations failed;" 1311 "%s is not contained in %s\n", path, rootpath); 1312 *stat = nfserr_notsupp; 1313 return NULL; 1314 } 1315 1316 return path + strlen(rootpath); 1317 } 1318 1319 /* 1320 * encode a fs_locations structure 1321 */ 1322 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1323 struct svc_export *exp, 1324 __be32 **pp, int *buflen) 1325 { 1326 __be32 status; 1327 int i; 1328 __be32 *p = *pp; 1329 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1330 char *root = nfsd4_path(rqstp, exp, &status); 1331 1332 if (status) 1333 return status; 1334 status = nfsd4_encode_components('/', root, &p, buflen); 1335 if (status) 1336 return status; 1337 if ((*buflen -= 4) < 0) 1338 return nfserr_resource; 1339 WRITE32(fslocs->locations_count); 1340 for (i=0; i<fslocs->locations_count; i++) { 1341 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1342 &p, buflen); 1343 if (status) 1344 return status; 1345 } 1346 *pp = p; 1347 return 0; 1348 } 1349 1350 static u32 nfs4_ftypes[16] = { 1351 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1352 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1353 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1354 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1355 }; 1356 1357 static __be32 1358 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1359 __be32 **p, int *buflen) 1360 { 1361 int status; 1362 1363 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1364 return nfserr_resource; 1365 if (whotype != NFS4_ACL_WHO_NAMED) 1366 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1367 else if (group) 1368 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1369 else 1370 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1371 if (status < 0) 1372 return nfserrno(status); 1373 *p = xdr_encode_opaque(*p, NULL, status); 1374 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1375 BUG_ON(*buflen < 0); 1376 return 0; 1377 } 1378 1379 static inline __be32 1380 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1381 { 1382 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1383 } 1384 1385 static inline __be32 1386 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1387 { 1388 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1389 } 1390 1391 static inline __be32 1392 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1393 __be32 **p, int *buflen) 1394 { 1395 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1396 } 1397 1398 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1399 FATTR4_WORD0_RDATTR_ERROR) 1400 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1401 1402 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1403 { 1404 /* As per referral draft: */ 1405 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1406 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1407 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1408 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1409 *rdattr_err = NFSERR_MOVED; 1410 else 1411 return nfserr_moved; 1412 } 1413 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1414 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1415 return 0; 1416 } 1417 1418 /* 1419 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1420 * ourselves. 1421 * 1422 * @countp is the buffer size in _words_; upon successful return this becomes 1423 * replaced with the number of words written. 1424 */ 1425 __be32 1426 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1427 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1428 struct svc_rqst *rqstp) 1429 { 1430 u32 bmval0 = bmval[0]; 1431 u32 bmval1 = bmval[1]; 1432 struct kstat stat; 1433 struct svc_fh tempfh; 1434 struct kstatfs statfs; 1435 int buflen = *countp << 2; 1436 __be32 *attrlenp; 1437 u32 dummy; 1438 u64 dummy64; 1439 u32 rdattr_err = 0; 1440 __be32 *p = buffer; 1441 __be32 status; 1442 int err; 1443 int aclsupport = 0; 1444 struct nfs4_acl *acl = NULL; 1445 1446 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1447 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1448 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1449 1450 if (exp->ex_fslocs.migrated) { 1451 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1452 if (status) 1453 goto out; 1454 } 1455 1456 err = vfs_getattr(exp->ex_mnt, dentry, &stat); 1457 if (err) 1458 goto out_nfserr; 1459 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) || 1460 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1461 FATTR4_WORD1_SPACE_TOTAL))) { 1462 err = vfs_statfs(dentry, &statfs); 1463 if (err) 1464 goto out_nfserr; 1465 } 1466 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1467 fh_init(&tempfh, NFS4_FHSIZE); 1468 status = fh_compose(&tempfh, exp, dentry, NULL); 1469 if (status) 1470 goto out; 1471 fhp = &tempfh; 1472 } 1473 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1474 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1475 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1476 aclsupport = (err == 0); 1477 if (bmval0 & FATTR4_WORD0_ACL) { 1478 if (err == -EOPNOTSUPP) 1479 bmval0 &= ~FATTR4_WORD0_ACL; 1480 else if (err == -EINVAL) { 1481 status = nfserr_attrnotsupp; 1482 goto out; 1483 } else if (err != 0) 1484 goto out_nfserr; 1485 } 1486 } 1487 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1488 if (exp->ex_fslocs.locations == NULL) { 1489 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1490 } 1491 } 1492 if ((buflen -= 16) < 0) 1493 goto out_resource; 1494 1495 WRITE32(2); 1496 WRITE32(bmval0); 1497 WRITE32(bmval1); 1498 attrlenp = p++; /* to be backfilled later */ 1499 1500 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1501 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1502 if ((buflen -= 12) < 0) 1503 goto out_resource; 1504 if (!aclsupport) 1505 word0 &= ~FATTR4_WORD0_ACL; 1506 if (!exp->ex_fslocs.locations) 1507 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1508 WRITE32(2); 1509 WRITE32(word0); 1510 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1511 } 1512 if (bmval0 & FATTR4_WORD0_TYPE) { 1513 if ((buflen -= 4) < 0) 1514 goto out_resource; 1515 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1516 if (dummy == NF4BAD) 1517 goto out_serverfault; 1518 WRITE32(dummy); 1519 } 1520 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1521 if ((buflen -= 4) < 0) 1522 goto out_resource; 1523 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1524 WRITE32(NFS4_FH_PERSISTENT); 1525 else 1526 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1527 } 1528 if (bmval0 & FATTR4_WORD0_CHANGE) { 1529 /* 1530 * Note: This _must_ be consistent with the scheme for writing 1531 * change_info, so any changes made here must be reflected there 1532 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1533 * macro above.) 1534 */ 1535 if ((buflen -= 8) < 0) 1536 goto out_resource; 1537 WRITE32(stat.ctime.tv_sec); 1538 WRITE32(stat.ctime.tv_nsec); 1539 } 1540 if (bmval0 & FATTR4_WORD0_SIZE) { 1541 if ((buflen -= 8) < 0) 1542 goto out_resource; 1543 WRITE64(stat.size); 1544 } 1545 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1546 if ((buflen -= 4) < 0) 1547 goto out_resource; 1548 WRITE32(1); 1549 } 1550 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1551 if ((buflen -= 4) < 0) 1552 goto out_resource; 1553 WRITE32(1); 1554 } 1555 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1556 if ((buflen -= 4) < 0) 1557 goto out_resource; 1558 WRITE32(0); 1559 } 1560 if (bmval0 & FATTR4_WORD0_FSID) { 1561 if ((buflen -= 16) < 0) 1562 goto out_resource; 1563 if (exp->ex_fslocs.migrated) { 1564 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1565 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1566 } else if (is_fsid(fhp, rqstp->rq_reffh)) { 1567 WRITE64((u64)exp->ex_fsid); 1568 WRITE64((u64)0); 1569 } else { 1570 WRITE32(0); 1571 WRITE32(MAJOR(stat.dev)); 1572 WRITE32(0); 1573 WRITE32(MINOR(stat.dev)); 1574 } 1575 } 1576 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1577 if ((buflen -= 4) < 0) 1578 goto out_resource; 1579 WRITE32(0); 1580 } 1581 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1582 if ((buflen -= 4) < 0) 1583 goto out_resource; 1584 WRITE32(NFSD_LEASE_TIME); 1585 } 1586 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1587 if ((buflen -= 4) < 0) 1588 goto out_resource; 1589 WRITE32(rdattr_err); 1590 } 1591 if (bmval0 & FATTR4_WORD0_ACL) { 1592 struct nfs4_ace *ace; 1593 struct list_head *h; 1594 1595 if (acl == NULL) { 1596 if ((buflen -= 4) < 0) 1597 goto out_resource; 1598 1599 WRITE32(0); 1600 goto out_acl; 1601 } 1602 if ((buflen -= 4) < 0) 1603 goto out_resource; 1604 WRITE32(acl->naces); 1605 1606 list_for_each(h, &acl->ace_head) { 1607 ace = list_entry(h, struct nfs4_ace, l_ace); 1608 1609 if ((buflen -= 4*3) < 0) 1610 goto out_resource; 1611 WRITE32(ace->type); 1612 WRITE32(ace->flag); 1613 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1614 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1615 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1616 &p, &buflen); 1617 if (status == nfserr_resource) 1618 goto out_resource; 1619 if (status) 1620 goto out; 1621 } 1622 } 1623 out_acl: 1624 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1625 if ((buflen -= 4) < 0) 1626 goto out_resource; 1627 WRITE32(aclsupport ? 1628 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1629 } 1630 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1631 if ((buflen -= 4) < 0) 1632 goto out_resource; 1633 WRITE32(1); 1634 } 1635 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1636 if ((buflen -= 4) < 0) 1637 goto out_resource; 1638 WRITE32(1); 1639 } 1640 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1641 if ((buflen -= 4) < 0) 1642 goto out_resource; 1643 WRITE32(1); 1644 } 1645 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1646 if ((buflen -= 4) < 0) 1647 goto out_resource; 1648 WRITE32(1); 1649 } 1650 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1651 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1652 if (buflen < 0) 1653 goto out_resource; 1654 WRITE32(fhp->fh_handle.fh_size); 1655 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1656 } 1657 if (bmval0 & FATTR4_WORD0_FILEID) { 1658 if ((buflen -= 8) < 0) 1659 goto out_resource; 1660 WRITE64((u64) stat.ino); 1661 } 1662 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1663 if ((buflen -= 8) < 0) 1664 goto out_resource; 1665 WRITE64((u64) statfs.f_ffree); 1666 } 1667 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1668 if ((buflen -= 8) < 0) 1669 goto out_resource; 1670 WRITE64((u64) statfs.f_ffree); 1671 } 1672 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1673 if ((buflen -= 8) < 0) 1674 goto out_resource; 1675 WRITE64((u64) statfs.f_files); 1676 } 1677 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1678 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1679 if (status == nfserr_resource) 1680 goto out_resource; 1681 if (status) 1682 goto out; 1683 } 1684 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1685 if ((buflen -= 4) < 0) 1686 goto out_resource; 1687 WRITE32(1); 1688 } 1689 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1690 if ((buflen -= 8) < 0) 1691 goto out_resource; 1692 WRITE64(~(u64)0); 1693 } 1694 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1695 if ((buflen -= 4) < 0) 1696 goto out_resource; 1697 WRITE32(255); 1698 } 1699 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1700 if ((buflen -= 4) < 0) 1701 goto out_resource; 1702 WRITE32(~(u32) 0); 1703 } 1704 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1705 if ((buflen -= 8) < 0) 1706 goto out_resource; 1707 WRITE64((u64) svc_max_payload(rqstp)); 1708 } 1709 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1710 if ((buflen -= 8) < 0) 1711 goto out_resource; 1712 WRITE64((u64) svc_max_payload(rqstp)); 1713 } 1714 if (bmval1 & FATTR4_WORD1_MODE) { 1715 if ((buflen -= 4) < 0) 1716 goto out_resource; 1717 WRITE32(stat.mode & S_IALLUGO); 1718 } 1719 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1720 if ((buflen -= 4) < 0) 1721 goto out_resource; 1722 WRITE32(1); 1723 } 1724 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1725 if ((buflen -= 4) < 0) 1726 goto out_resource; 1727 WRITE32(stat.nlink); 1728 } 1729 if (bmval1 & FATTR4_WORD1_OWNER) { 1730 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1731 if (status == nfserr_resource) 1732 goto out_resource; 1733 if (status) 1734 goto out; 1735 } 1736 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1737 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1738 if (status == nfserr_resource) 1739 goto out_resource; 1740 if (status) 1741 goto out; 1742 } 1743 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1744 if ((buflen -= 8) < 0) 1745 goto out_resource; 1746 WRITE32((u32) MAJOR(stat.rdev)); 1747 WRITE32((u32) MINOR(stat.rdev)); 1748 } 1749 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1750 if ((buflen -= 8) < 0) 1751 goto out_resource; 1752 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1753 WRITE64(dummy64); 1754 } 1755 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1756 if ((buflen -= 8) < 0) 1757 goto out_resource; 1758 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1759 WRITE64(dummy64); 1760 } 1761 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1762 if ((buflen -= 8) < 0) 1763 goto out_resource; 1764 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1765 WRITE64(dummy64); 1766 } 1767 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1768 if ((buflen -= 8) < 0) 1769 goto out_resource; 1770 dummy64 = (u64)stat.blocks << 9; 1771 WRITE64(dummy64); 1772 } 1773 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1774 if ((buflen -= 12) < 0) 1775 goto out_resource; 1776 WRITE32(0); 1777 WRITE32(stat.atime.tv_sec); 1778 WRITE32(stat.atime.tv_nsec); 1779 } 1780 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1781 if ((buflen -= 12) < 0) 1782 goto out_resource; 1783 WRITE32(0); 1784 WRITE32(1); 1785 WRITE32(0); 1786 } 1787 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1788 if ((buflen -= 12) < 0) 1789 goto out_resource; 1790 WRITE32(0); 1791 WRITE32(stat.ctime.tv_sec); 1792 WRITE32(stat.ctime.tv_nsec); 1793 } 1794 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1795 if ((buflen -= 12) < 0) 1796 goto out_resource; 1797 WRITE32(0); 1798 WRITE32(stat.mtime.tv_sec); 1799 WRITE32(stat.mtime.tv_nsec); 1800 } 1801 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1802 struct dentry *mnt_pnt, *mnt_root; 1803 1804 if ((buflen -= 8) < 0) 1805 goto out_resource; 1806 mnt_root = exp->ex_mnt->mnt_root; 1807 if (mnt_root->d_inode == dentry->d_inode) { 1808 mnt_pnt = exp->ex_mnt->mnt_mountpoint; 1809 WRITE64((u64) mnt_pnt->d_inode->i_ino); 1810 } else 1811 WRITE64((u64) stat.ino); 1812 } 1813 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1814 *countp = p - buffer; 1815 status = nfs_ok; 1816 1817 out: 1818 nfs4_acl_free(acl); 1819 if (fhp == &tempfh) 1820 fh_put(&tempfh); 1821 return status; 1822 out_nfserr: 1823 status = nfserrno(err); 1824 goto out; 1825 out_resource: 1826 *countp = 0; 1827 status = nfserr_resource; 1828 goto out; 1829 out_serverfault: 1830 status = nfserr_serverfault; 1831 goto out; 1832 } 1833 1834 static __be32 1835 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1836 const char *name, int namlen, __be32 *p, int *buflen) 1837 { 1838 struct svc_export *exp = cd->rd_fhp->fh_export; 1839 struct dentry *dentry; 1840 __be32 nfserr; 1841 1842 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1843 if (IS_ERR(dentry)) 1844 return nfserrno(PTR_ERR(dentry)); 1845 1846 exp_get(exp); 1847 if (d_mountpoint(dentry)) { 1848 int err; 1849 1850 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1851 if (err) { 1852 nfserr = nfserrno(err); 1853 goto out_put; 1854 } 1855 1856 } 1857 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1858 cd->rd_rqstp); 1859 out_put: 1860 dput(dentry); 1861 exp_put(exp); 1862 return nfserr; 1863 } 1864 1865 static __be32 * 1866 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1867 { 1868 __be32 *attrlenp; 1869 1870 if (buflen < 6) 1871 return NULL; 1872 *p++ = htonl(2); 1873 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1874 *p++ = htonl(0); /* bmval1 */ 1875 1876 attrlenp = p++; 1877 *p++ = nfserr; /* no htonl */ 1878 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1879 return p; 1880 } 1881 1882 static int 1883 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1884 loff_t offset, u64 ino, unsigned int d_type) 1885 { 1886 struct readdir_cd *ccd = ccdv; 1887 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1888 int buflen; 1889 __be32 *p = cd->buffer; 1890 __be32 nfserr = nfserr_toosmall; 1891 1892 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1893 if (name && isdotent(name, namlen)) { 1894 cd->common.err = nfs_ok; 1895 return 0; 1896 } 1897 1898 if (cd->offset) 1899 xdr_encode_hyper(cd->offset, (u64) offset); 1900 1901 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1902 if (buflen < 0) 1903 goto fail; 1904 1905 *p++ = xdr_one; /* mark entry present */ 1906 cd->offset = p; /* remember pointer */ 1907 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1908 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1909 1910 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1911 switch (nfserr) { 1912 case nfs_ok: 1913 p += buflen; 1914 break; 1915 case nfserr_resource: 1916 nfserr = nfserr_toosmall; 1917 goto fail; 1918 case nfserr_dropit: 1919 goto fail; 1920 default: 1921 /* 1922 * If the client requested the RDATTR_ERROR attribute, 1923 * we stuff the error code into this attribute 1924 * and continue. If this attribute was not requested, 1925 * then in accordance with the spec, we fail the 1926 * entire READDIR operation(!) 1927 */ 1928 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1929 goto fail; 1930 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1931 if (p == NULL) { 1932 nfserr = nfserr_toosmall; 1933 goto fail; 1934 } 1935 } 1936 cd->buflen -= (p - cd->buffer); 1937 cd->buffer = p; 1938 cd->common.err = nfs_ok; 1939 return 0; 1940 fail: 1941 cd->common.err = nfserr; 1942 return -EINVAL; 1943 } 1944 1945 static void 1946 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1947 { 1948 ENCODE_HEAD; 1949 1950 if (!nfserr) { 1951 RESERVE_SPACE(8); 1952 WRITE32(access->ac_supported); 1953 WRITE32(access->ac_resp_access); 1954 ADJUST_ARGS(); 1955 } 1956 } 1957 1958 static void 1959 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 1960 { 1961 ENCODE_SEQID_OP_HEAD; 1962 1963 if (!nfserr) { 1964 RESERVE_SPACE(sizeof(stateid_t)); 1965 WRITE32(close->cl_stateid.si_generation); 1966 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 1967 ADJUST_ARGS(); 1968 } 1969 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 1970 } 1971 1972 1973 static void 1974 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 1975 { 1976 ENCODE_HEAD; 1977 1978 if (!nfserr) { 1979 RESERVE_SPACE(8); 1980 WRITEMEM(commit->co_verf.data, 8); 1981 ADJUST_ARGS(); 1982 } 1983 } 1984 1985 static void 1986 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 1987 { 1988 ENCODE_HEAD; 1989 1990 if (!nfserr) { 1991 RESERVE_SPACE(32); 1992 WRITECINFO(create->cr_cinfo); 1993 WRITE32(2); 1994 WRITE32(create->cr_bmval[0]); 1995 WRITE32(create->cr_bmval[1]); 1996 ADJUST_ARGS(); 1997 } 1998 } 1999 2000 static __be32 2001 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2002 { 2003 struct svc_fh *fhp = getattr->ga_fhp; 2004 int buflen; 2005 2006 if (nfserr) 2007 return nfserr; 2008 2009 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2010 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2011 resp->p, &buflen, getattr->ga_bmval, 2012 resp->rqstp); 2013 if (!nfserr) 2014 resp->p += buflen; 2015 return nfserr; 2016 } 2017 2018 static void 2019 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2020 { 2021 unsigned int len; 2022 ENCODE_HEAD; 2023 2024 if (!nfserr) { 2025 len = fhp->fh_handle.fh_size; 2026 RESERVE_SPACE(len + 4); 2027 WRITE32(len); 2028 WRITEMEM(&fhp->fh_handle.fh_base, len); 2029 ADJUST_ARGS(); 2030 } 2031 } 2032 2033 /* 2034 * Including all fields other than the name, a LOCK4denied structure requires 2035 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2036 */ 2037 static void 2038 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2039 { 2040 ENCODE_HEAD; 2041 2042 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2043 WRITE64(ld->ld_start); 2044 WRITE64(ld->ld_length); 2045 WRITE32(ld->ld_type); 2046 if (ld->ld_sop) { 2047 WRITEMEM(&ld->ld_clientid, 8); 2048 WRITE32(ld->ld_sop->so_owner.len); 2049 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2050 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2051 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2052 WRITE64((u64)0); /* clientid */ 2053 WRITE32(0); /* length of owner name */ 2054 } 2055 ADJUST_ARGS(); 2056 } 2057 2058 static void 2059 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2060 { 2061 ENCODE_SEQID_OP_HEAD; 2062 2063 if (!nfserr) { 2064 RESERVE_SPACE(4 + sizeof(stateid_t)); 2065 WRITE32(lock->lk_resp_stateid.si_generation); 2066 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2067 ADJUST_ARGS(); 2068 } else if (nfserr == nfserr_denied) 2069 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2070 2071 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2072 } 2073 2074 static void 2075 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2076 { 2077 if (nfserr == nfserr_denied) 2078 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2079 } 2080 2081 static void 2082 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2083 { 2084 ENCODE_SEQID_OP_HEAD; 2085 2086 if (!nfserr) { 2087 RESERVE_SPACE(sizeof(stateid_t)); 2088 WRITE32(locku->lu_stateid.si_generation); 2089 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2090 ADJUST_ARGS(); 2091 } 2092 2093 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2094 } 2095 2096 2097 static void 2098 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2099 { 2100 ENCODE_HEAD; 2101 2102 if (!nfserr) { 2103 RESERVE_SPACE(20); 2104 WRITECINFO(link->li_cinfo); 2105 ADJUST_ARGS(); 2106 } 2107 } 2108 2109 2110 static void 2111 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2112 { 2113 ENCODE_SEQID_OP_HEAD; 2114 2115 if (nfserr) 2116 goto out; 2117 2118 RESERVE_SPACE(36 + sizeof(stateid_t)); 2119 WRITE32(open->op_stateid.si_generation); 2120 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2121 WRITECINFO(open->op_cinfo); 2122 WRITE32(open->op_rflags); 2123 WRITE32(2); 2124 WRITE32(open->op_bmval[0]); 2125 WRITE32(open->op_bmval[1]); 2126 WRITE32(open->op_delegate_type); 2127 ADJUST_ARGS(); 2128 2129 switch (open->op_delegate_type) { 2130 case NFS4_OPEN_DELEGATE_NONE: 2131 break; 2132 case NFS4_OPEN_DELEGATE_READ: 2133 RESERVE_SPACE(20 + sizeof(stateid_t)); 2134 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2135 WRITE32(open->op_recall); 2136 2137 /* 2138 * TODO: ACE's in delegations 2139 */ 2140 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2141 WRITE32(0); 2142 WRITE32(0); 2143 WRITE32(0); /* XXX: is NULL principal ok? */ 2144 ADJUST_ARGS(); 2145 break; 2146 case NFS4_OPEN_DELEGATE_WRITE: 2147 RESERVE_SPACE(32 + sizeof(stateid_t)); 2148 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2149 WRITE32(0); 2150 2151 /* 2152 * TODO: space_limit's in delegations 2153 */ 2154 WRITE32(NFS4_LIMIT_SIZE); 2155 WRITE32(~(u32)0); 2156 WRITE32(~(u32)0); 2157 2158 /* 2159 * TODO: ACE's in delegations 2160 */ 2161 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2162 WRITE32(0); 2163 WRITE32(0); 2164 WRITE32(0); /* XXX: is NULL principal ok? */ 2165 ADJUST_ARGS(); 2166 break; 2167 default: 2168 BUG(); 2169 } 2170 /* XXX save filehandle here */ 2171 out: 2172 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2173 } 2174 2175 static void 2176 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2177 { 2178 ENCODE_SEQID_OP_HEAD; 2179 2180 if (!nfserr) { 2181 RESERVE_SPACE(sizeof(stateid_t)); 2182 WRITE32(oc->oc_resp_stateid.si_generation); 2183 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2184 ADJUST_ARGS(); 2185 } 2186 2187 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2188 } 2189 2190 static void 2191 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2192 { 2193 ENCODE_SEQID_OP_HEAD; 2194 2195 if (!nfserr) { 2196 RESERVE_SPACE(sizeof(stateid_t)); 2197 WRITE32(od->od_stateid.si_generation); 2198 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2199 ADJUST_ARGS(); 2200 } 2201 2202 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2203 } 2204 2205 static __be32 2206 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2207 struct nfsd4_read *read) 2208 { 2209 u32 eof; 2210 int v, pn; 2211 unsigned long maxcount; 2212 long len; 2213 ENCODE_HEAD; 2214 2215 if (nfserr) 2216 return nfserr; 2217 if (resp->xbuf->page_len) 2218 return nfserr_resource; 2219 2220 RESERVE_SPACE(8); /* eof flag and byte count */ 2221 2222 maxcount = svc_max_payload(resp->rqstp); 2223 if (maxcount > read->rd_length) 2224 maxcount = read->rd_length; 2225 2226 len = maxcount; 2227 v = 0; 2228 while (len > 0) { 2229 pn = resp->rqstp->rq_resused++; 2230 resp->rqstp->rq_vec[v].iov_base = 2231 page_address(resp->rqstp->rq_respages[pn]); 2232 resp->rqstp->rq_vec[v].iov_len = 2233 len < PAGE_SIZE ? len : PAGE_SIZE; 2234 v++; 2235 len -= PAGE_SIZE; 2236 } 2237 read->rd_vlen = v; 2238 2239 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2240 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2241 &maxcount); 2242 2243 if (nfserr == nfserr_symlink) 2244 nfserr = nfserr_inval; 2245 if (nfserr) 2246 return nfserr; 2247 eof = (read->rd_offset + maxcount >= 2248 read->rd_fhp->fh_dentry->d_inode->i_size); 2249 2250 WRITE32(eof); 2251 WRITE32(maxcount); 2252 ADJUST_ARGS(); 2253 resp->xbuf->head[0].iov_len = (char*)p 2254 - (char*)resp->xbuf->head[0].iov_base; 2255 resp->xbuf->page_len = maxcount; 2256 2257 /* Use rest of head for padding and remaining ops: */ 2258 resp->xbuf->tail[0].iov_base = p; 2259 resp->xbuf->tail[0].iov_len = 0; 2260 if (maxcount&3) { 2261 RESERVE_SPACE(4); 2262 WRITE32(0); 2263 resp->xbuf->tail[0].iov_base += maxcount&3; 2264 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2265 ADJUST_ARGS(); 2266 } 2267 return 0; 2268 } 2269 2270 static __be32 2271 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2272 { 2273 int maxcount; 2274 char *page; 2275 ENCODE_HEAD; 2276 2277 if (nfserr) 2278 return nfserr; 2279 if (resp->xbuf->page_len) 2280 return nfserr_resource; 2281 2282 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2283 2284 maxcount = PAGE_SIZE; 2285 RESERVE_SPACE(4); 2286 2287 /* 2288 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2289 * if they would overflow the buffer. Is this kosher in NFSv4? If 2290 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2291 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2292 */ 2293 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2294 if (nfserr == nfserr_isdir) 2295 return nfserr_inval; 2296 if (nfserr) 2297 return nfserr; 2298 2299 WRITE32(maxcount); 2300 ADJUST_ARGS(); 2301 resp->xbuf->head[0].iov_len = (char*)p 2302 - (char*)resp->xbuf->head[0].iov_base; 2303 resp->xbuf->page_len = maxcount; 2304 2305 /* Use rest of head for padding and remaining ops: */ 2306 resp->xbuf->tail[0].iov_base = p; 2307 resp->xbuf->tail[0].iov_len = 0; 2308 if (maxcount&3) { 2309 RESERVE_SPACE(4); 2310 WRITE32(0); 2311 resp->xbuf->tail[0].iov_base += maxcount&3; 2312 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2313 ADJUST_ARGS(); 2314 } 2315 return 0; 2316 } 2317 2318 static __be32 2319 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2320 { 2321 int maxcount; 2322 loff_t offset; 2323 __be32 *page, *savep, *tailbase; 2324 ENCODE_HEAD; 2325 2326 if (nfserr) 2327 return nfserr; 2328 if (resp->xbuf->page_len) 2329 return nfserr_resource; 2330 2331 RESERVE_SPACE(8); /* verifier */ 2332 savep = p; 2333 2334 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2335 WRITE32(0); 2336 WRITE32(0); 2337 ADJUST_ARGS(); 2338 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2339 tailbase = p; 2340 2341 maxcount = PAGE_SIZE; 2342 if (maxcount > readdir->rd_maxcount) 2343 maxcount = readdir->rd_maxcount; 2344 2345 /* 2346 * Convert from bytes to words, account for the two words already 2347 * written, make sure to leave two words at the end for the next 2348 * pointer and eof field. 2349 */ 2350 maxcount = (maxcount >> 2) - 4; 2351 if (maxcount < 0) { 2352 nfserr = nfserr_toosmall; 2353 goto err_no_verf; 2354 } 2355 2356 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2357 readdir->common.err = 0; 2358 readdir->buflen = maxcount; 2359 readdir->buffer = page; 2360 readdir->offset = NULL; 2361 2362 offset = readdir->rd_cookie; 2363 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2364 &offset, 2365 &readdir->common, nfsd4_encode_dirent); 2366 if (nfserr == nfs_ok && 2367 readdir->common.err == nfserr_toosmall && 2368 readdir->buffer == page) 2369 nfserr = nfserr_toosmall; 2370 if (nfserr == nfserr_symlink) 2371 nfserr = nfserr_notdir; 2372 if (nfserr) 2373 goto err_no_verf; 2374 2375 if (readdir->offset) 2376 xdr_encode_hyper(readdir->offset, offset); 2377 2378 p = readdir->buffer; 2379 *p++ = 0; /* no more entries */ 2380 *p++ = htonl(readdir->common.err == nfserr_eof); 2381 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2382 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2383 2384 /* Use rest of head for padding and remaining ops: */ 2385 resp->xbuf->tail[0].iov_base = tailbase; 2386 resp->xbuf->tail[0].iov_len = 0; 2387 resp->p = resp->xbuf->tail[0].iov_base; 2388 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2389 2390 return 0; 2391 err_no_verf: 2392 p = savep; 2393 ADJUST_ARGS(); 2394 return nfserr; 2395 } 2396 2397 static void 2398 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2399 { 2400 ENCODE_HEAD; 2401 2402 if (!nfserr) { 2403 RESERVE_SPACE(20); 2404 WRITECINFO(remove->rm_cinfo); 2405 ADJUST_ARGS(); 2406 } 2407 } 2408 2409 static void 2410 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2411 { 2412 ENCODE_HEAD; 2413 2414 if (!nfserr) { 2415 RESERVE_SPACE(40); 2416 WRITECINFO(rename->rn_sinfo); 2417 WRITECINFO(rename->rn_tinfo); 2418 ADJUST_ARGS(); 2419 } 2420 } 2421 2422 /* 2423 * The SETATTR encode routine is special -- it always encodes a bitmap, 2424 * regardless of the error status. 2425 */ 2426 static void 2427 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2428 { 2429 ENCODE_HEAD; 2430 2431 RESERVE_SPACE(12); 2432 if (nfserr) { 2433 WRITE32(2); 2434 WRITE32(0); 2435 WRITE32(0); 2436 } 2437 else { 2438 WRITE32(2); 2439 WRITE32(setattr->sa_bmval[0]); 2440 WRITE32(setattr->sa_bmval[1]); 2441 } 2442 ADJUST_ARGS(); 2443 } 2444 2445 static void 2446 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2447 { 2448 ENCODE_HEAD; 2449 2450 if (!nfserr) { 2451 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2452 WRITEMEM(&scd->se_clientid, 8); 2453 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2454 ADJUST_ARGS(); 2455 } 2456 else if (nfserr == nfserr_clid_inuse) { 2457 RESERVE_SPACE(8); 2458 WRITE32(0); 2459 WRITE32(0); 2460 ADJUST_ARGS(); 2461 } 2462 } 2463 2464 static void 2465 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2466 { 2467 ENCODE_HEAD; 2468 2469 if (!nfserr) { 2470 RESERVE_SPACE(16); 2471 WRITE32(write->wr_bytes_written); 2472 WRITE32(write->wr_how_written); 2473 WRITEMEM(write->wr_verifier.data, 8); 2474 ADJUST_ARGS(); 2475 } 2476 } 2477 2478 void 2479 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2480 { 2481 __be32 *statp; 2482 ENCODE_HEAD; 2483 2484 RESERVE_SPACE(8); 2485 WRITE32(op->opnum); 2486 statp = p++; /* to be backfilled at the end */ 2487 ADJUST_ARGS(); 2488 2489 switch (op->opnum) { 2490 case OP_ACCESS: 2491 nfsd4_encode_access(resp, op->status, &op->u.access); 2492 break; 2493 case OP_CLOSE: 2494 nfsd4_encode_close(resp, op->status, &op->u.close); 2495 break; 2496 case OP_COMMIT: 2497 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2498 break; 2499 case OP_CREATE: 2500 nfsd4_encode_create(resp, op->status, &op->u.create); 2501 break; 2502 case OP_DELEGRETURN: 2503 break; 2504 case OP_GETATTR: 2505 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2506 break; 2507 case OP_GETFH: 2508 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2509 break; 2510 case OP_LINK: 2511 nfsd4_encode_link(resp, op->status, &op->u.link); 2512 break; 2513 case OP_LOCK: 2514 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2515 break; 2516 case OP_LOCKT: 2517 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2518 break; 2519 case OP_LOCKU: 2520 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2521 break; 2522 case OP_LOOKUP: 2523 break; 2524 case OP_LOOKUPP: 2525 break; 2526 case OP_NVERIFY: 2527 break; 2528 case OP_OPEN: 2529 nfsd4_encode_open(resp, op->status, &op->u.open); 2530 break; 2531 case OP_OPEN_CONFIRM: 2532 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2533 break; 2534 case OP_OPEN_DOWNGRADE: 2535 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2536 break; 2537 case OP_PUTFH: 2538 break; 2539 case OP_PUTROOTFH: 2540 break; 2541 case OP_READ: 2542 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2543 break; 2544 case OP_READDIR: 2545 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2546 break; 2547 case OP_READLINK: 2548 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2549 break; 2550 case OP_REMOVE: 2551 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2552 break; 2553 case OP_RENAME: 2554 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2555 break; 2556 case OP_RENEW: 2557 break; 2558 case OP_RESTOREFH: 2559 break; 2560 case OP_SAVEFH: 2561 break; 2562 case OP_SETATTR: 2563 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2564 break; 2565 case OP_SETCLIENTID: 2566 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2567 break; 2568 case OP_SETCLIENTID_CONFIRM: 2569 break; 2570 case OP_VERIFY: 2571 break; 2572 case OP_WRITE: 2573 nfsd4_encode_write(resp, op->status, &op->u.write); 2574 break; 2575 case OP_RELEASE_LOCKOWNER: 2576 break; 2577 default: 2578 break; 2579 } 2580 2581 /* 2582 * Note: We write the status directly, instead of using WRITE32(), 2583 * since it is already in network byte order. 2584 */ 2585 *statp = op->status; 2586 } 2587 2588 /* 2589 * Encode the reply stored in the stateowner reply cache 2590 * 2591 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2592 * previously sent already encoded operation. 2593 * 2594 * called with nfs4_lock_state() held 2595 */ 2596 void 2597 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2598 { 2599 ENCODE_HEAD; 2600 struct nfs4_replay *rp = op->replay; 2601 2602 BUG_ON(!rp); 2603 2604 RESERVE_SPACE(8); 2605 WRITE32(op->opnum); 2606 *p++ = rp->rp_status; /* already xdr'ed */ 2607 ADJUST_ARGS(); 2608 2609 RESERVE_SPACE(rp->rp_buflen); 2610 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2611 ADJUST_ARGS(); 2612 } 2613 2614 /* 2615 * END OF "GENERIC" ENCODE ROUTINES. 2616 */ 2617 2618 int 2619 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2620 { 2621 return xdr_ressize_check(rqstp, p); 2622 } 2623 2624 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2625 { 2626 if (args->ops != args->iops) { 2627 kfree(args->ops); 2628 args->ops = args->iops; 2629 } 2630 kfree(args->tmpp); 2631 args->tmpp = NULL; 2632 while (args->to_free) { 2633 struct tmpbuf *tb = args->to_free; 2634 args->to_free = tb->next; 2635 tb->release(tb->buf); 2636 kfree(tb); 2637 } 2638 } 2639 2640 int 2641 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2642 { 2643 __be32 status; 2644 2645 args->p = p; 2646 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2647 args->pagelist = rqstp->rq_arg.pages; 2648 args->pagelen = rqstp->rq_arg.page_len; 2649 args->tmpp = NULL; 2650 args->to_free = NULL; 2651 args->ops = args->iops; 2652 args->rqstp = rqstp; 2653 2654 status = nfsd4_decode_compound(args); 2655 if (status) { 2656 nfsd4_release_compoundargs(args); 2657 } 2658 return !status; 2659 } 2660 2661 int 2662 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2663 { 2664 /* 2665 * All that remains is to write the tag and operation count... 2666 */ 2667 struct kvec *iov; 2668 p = resp->tagp; 2669 *p++ = htonl(resp->taglen); 2670 memcpy(p, resp->tag, resp->taglen); 2671 p += XDR_QUADLEN(resp->taglen); 2672 *p++ = htonl(resp->opcnt); 2673 2674 if (rqstp->rq_res.page_len) 2675 iov = &rqstp->rq_res.tail[0]; 2676 else 2677 iov = &rqstp->rq_res.head[0]; 2678 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2679 BUG_ON(iov->iov_len > PAGE_SIZE); 2680 return 1; 2681 } 2682 2683 /* 2684 * Local variables: 2685 * c-basic-offset: 8 2686 * End: 2687 */ 2688