1 /* 2 * fs/nfs/nfs4xdr.c 3 * 4 * Server-side XDR for NFSv4 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * TODO: Neil Brown made the following observation: We currently 38 * initially reserve NFSD_BUFSIZE space on the transmit queue and 39 * never release any of that until the request is complete. 40 * It would be good to calculate a new maximum response size while 41 * decoding the COMPOUND, and call svc_reserve with this number 42 * at the end of nfs4svc_decode_compoundargs. 43 */ 44 45 #include <linux/param.h> 46 #include <linux/smp.h> 47 #include <linux/fs.h> 48 #include <linux/namei.h> 49 #include <linux/vfs.h> 50 #include <linux/sunrpc/xdr.h> 51 #include <linux/sunrpc/svc.h> 52 #include <linux/sunrpc/clnt.h> 53 #include <linux/nfsd/nfsd.h> 54 #include <linux/nfsd/state.h> 55 #include <linux/nfsd/xdr4.h> 56 #include <linux/nfsd_idmap.h> 57 #include <linux/nfs4.h> 58 #include <linux/nfs4_acl.h> 59 #include <linux/sunrpc/gss_api.h> 60 #include <linux/sunrpc/svcauth_gss.h> 61 62 #define NFSDDBG_FACILITY NFSDDBG_XDR 63 64 /* 65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 66 * directory in order to indicate to the client that a filesystem boundary is present 67 * We use a fixed fsid for a referral 68 */ 69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 71 72 static __be32 73 check_filename(char *str, int len, __be32 err) 74 { 75 int i; 76 77 if (len == 0) 78 return nfserr_inval; 79 if (isdotent(str, len)) 80 return err; 81 for (i = 0; i < len; i++) 82 if (str[i] == '/') 83 return err; 84 return 0; 85 } 86 87 /* 88 * START OF "GENERIC" DECODE ROUTINES. 89 * These may look a little ugly since they are imported from a "generic" 90 * set of XDR encode/decode routines which are intended to be shared by 91 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 92 * 93 * If the pain of reading these is too great, it should be a straightforward 94 * task to translate them into Linux-specific versions which are more 95 * consistent with the style used in NFSv2/v3... 96 */ 97 #define DECODE_HEAD \ 98 __be32 *p; \ 99 __be32 status 100 #define DECODE_TAIL \ 101 status = 0; \ 102 out: \ 103 return status; \ 104 xdr_error: \ 105 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 106 status = nfserr_bad_xdr; \ 107 goto out 108 109 #define READ32(x) (x) = ntohl(*p++) 110 #define READ64(x) do { \ 111 (x) = (u64)ntohl(*p++) << 32; \ 112 (x) |= ntohl(*p++); \ 113 } while (0) 114 #define READTIME(x) do { \ 115 p++; \ 116 (x) = ntohl(*p++); \ 117 p++; \ 118 } while (0) 119 #define READMEM(x,nbytes) do { \ 120 x = (char *)p; \ 121 p += XDR_QUADLEN(nbytes); \ 122 } while (0) 123 #define SAVEMEM(x,nbytes) do { \ 124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 125 savemem(argp, p, nbytes) : \ 126 (char *)p)) { \ 127 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 128 goto xdr_error; \ 129 } \ 130 p += XDR_QUADLEN(nbytes); \ 131 } while (0) 132 #define COPYMEM(x,nbytes) do { \ 133 memcpy((x), p, nbytes); \ 134 p += XDR_QUADLEN(nbytes); \ 135 } while (0) 136 137 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 138 #define READ_BUF(nbytes) do { \ 139 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 140 p = argp->p; \ 141 argp->p += XDR_QUADLEN(nbytes); \ 142 } else if (!(p = read_buf(argp, nbytes))) { \ 143 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ 144 goto xdr_error; \ 145 } \ 146 } while (0) 147 148 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) 149 { 150 /* We want more bytes than seem to be available. 151 * Maybe we need a new page, maybe we have just run out 152 */ 153 int avail = (char*)argp->end - (char*)argp->p; 154 __be32 *p; 155 if (avail + argp->pagelen < nbytes) 156 return NULL; 157 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 158 return NULL; 159 /* ok, we can do it with the current plus the next page */ 160 if (nbytes <= sizeof(argp->tmp)) 161 p = argp->tmp; 162 else { 163 kfree(argp->tmpp); 164 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 165 if (!p) 166 return NULL; 167 168 } 169 memcpy(p, argp->p, avail); 170 /* step to next page */ 171 argp->p = page_address(argp->pagelist[0]); 172 argp->pagelist++; 173 if (argp->pagelen < PAGE_SIZE) { 174 argp->end = p + (argp->pagelen>>2); 175 argp->pagelen = 0; 176 } else { 177 argp->end = p + (PAGE_SIZE>>2); 178 argp->pagelen -= PAGE_SIZE; 179 } 180 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 181 argp->p += XDR_QUADLEN(nbytes - avail); 182 return p; 183 } 184 185 static int 186 defer_free(struct nfsd4_compoundargs *argp, 187 void (*release)(const void *), void *p) 188 { 189 struct tmpbuf *tb; 190 191 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 192 if (!tb) 193 return -ENOMEM; 194 tb->buf = p; 195 tb->release = release; 196 tb->next = argp->to_free; 197 argp->to_free = tb; 198 return 0; 199 } 200 201 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 202 { 203 if (p == argp->tmp) { 204 p = kmalloc(nbytes, GFP_KERNEL); 205 if (!p) 206 return NULL; 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(p); 214 return NULL; 215 } else 216 return (char *)p; 217 } 218 219 static __be32 220 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 221 { 222 u32 bmlen; 223 DECODE_HEAD; 224 225 bmval[0] = 0; 226 bmval[1] = 0; 227 228 READ_BUF(4); 229 READ32(bmlen); 230 if (bmlen > 1000) 231 goto xdr_error; 232 233 READ_BUF(bmlen << 2); 234 if (bmlen > 0) 235 READ32(bmval[0]); 236 if (bmlen > 1) 237 READ32(bmval[1]); 238 239 DECODE_TAIL; 240 } 241 242 static __be32 243 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 244 struct nfs4_acl **acl) 245 { 246 int expected_len, len = 0; 247 u32 dummy32; 248 char *buf; 249 int host_err; 250 251 DECODE_HEAD; 252 iattr->ia_valid = 0; 253 if ((status = nfsd4_decode_bitmap(argp, bmval))) 254 return status; 255 256 /* 257 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP; 258 * read-only attributes return ERR_INVAL. 259 */ 260 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 261 return nfserr_attrnotsupp; 262 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 263 return nfserr_inval; 264 265 READ_BUF(4); 266 READ32(expected_len); 267 268 if (bmval[0] & FATTR4_WORD0_SIZE) { 269 READ_BUF(8); 270 len += 8; 271 READ64(iattr->ia_size); 272 iattr->ia_valid |= ATTR_SIZE; 273 } 274 if (bmval[0] & FATTR4_WORD0_ACL) { 275 int nace; 276 struct nfs4_ace *ace; 277 278 READ_BUF(4); len += 4; 279 READ32(nace); 280 281 if (nace > NFS4_ACL_MAX) 282 return nfserr_resource; 283 284 *acl = nfs4_acl_new(nace); 285 if (*acl == NULL) { 286 host_err = -ENOMEM; 287 goto out_nfserr; 288 } 289 defer_free(argp, kfree, *acl); 290 291 (*acl)->naces = nace; 292 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 293 READ_BUF(16); len += 16; 294 READ32(ace->type); 295 READ32(ace->flag); 296 READ32(ace->access_mask); 297 READ32(dummy32); 298 READ_BUF(dummy32); 299 len += XDR_QUADLEN(dummy32) << 2; 300 READMEM(buf, dummy32); 301 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 302 host_err = 0; 303 if (ace->whotype != NFS4_ACL_WHO_NAMED) 304 ace->who = 0; 305 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 306 host_err = nfsd_map_name_to_gid(argp->rqstp, 307 buf, dummy32, &ace->who); 308 else 309 host_err = nfsd_map_name_to_uid(argp->rqstp, 310 buf, dummy32, &ace->who); 311 if (host_err) 312 goto out_nfserr; 313 } 314 } else 315 *acl = NULL; 316 if (bmval[1] & FATTR4_WORD1_MODE) { 317 READ_BUF(4); 318 len += 4; 319 READ32(iattr->ia_mode); 320 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 321 iattr->ia_valid |= ATTR_MODE; 322 } 323 if (bmval[1] & FATTR4_WORD1_OWNER) { 324 READ_BUF(4); 325 len += 4; 326 READ32(dummy32); 327 READ_BUF(dummy32); 328 len += (XDR_QUADLEN(dummy32) << 2); 329 READMEM(buf, dummy32); 330 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 331 goto out_nfserr; 332 iattr->ia_valid |= ATTR_UID; 333 } 334 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 335 READ_BUF(4); 336 len += 4; 337 READ32(dummy32); 338 READ_BUF(dummy32); 339 len += (XDR_QUADLEN(dummy32) << 2); 340 READMEM(buf, dummy32); 341 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 342 goto out_nfserr; 343 iattr->ia_valid |= ATTR_GID; 344 } 345 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 346 READ_BUF(4); 347 len += 4; 348 READ32(dummy32); 349 switch (dummy32) { 350 case NFS4_SET_TO_CLIENT_TIME: 351 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 352 all 32 bits of 'nseconds'. */ 353 READ_BUF(12); 354 len += 12; 355 READ32(dummy32); 356 if (dummy32) 357 return nfserr_inval; 358 READ32(iattr->ia_atime.tv_sec); 359 READ32(iattr->ia_atime.tv_nsec); 360 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 361 return nfserr_inval; 362 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 363 break; 364 case NFS4_SET_TO_SERVER_TIME: 365 iattr->ia_valid |= ATTR_ATIME; 366 break; 367 default: 368 goto xdr_error; 369 } 370 } 371 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { 372 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 373 all 32 bits of 'nseconds'. */ 374 READ_BUF(12); 375 len += 12; 376 READ32(dummy32); 377 if (dummy32) 378 return nfserr_inval; 379 READ32(iattr->ia_ctime.tv_sec); 380 READ32(iattr->ia_ctime.tv_nsec); 381 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) 382 return nfserr_inval; 383 iattr->ia_valid |= ATTR_CTIME; 384 } 385 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 386 READ_BUF(4); 387 len += 4; 388 READ32(dummy32); 389 switch (dummy32) { 390 case NFS4_SET_TO_CLIENT_TIME: 391 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 392 all 32 bits of 'nseconds'. */ 393 READ_BUF(12); 394 len += 12; 395 READ32(dummy32); 396 if (dummy32) 397 return nfserr_inval; 398 READ32(iattr->ia_mtime.tv_sec); 399 READ32(iattr->ia_mtime.tv_nsec); 400 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 401 return nfserr_inval; 402 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 403 break; 404 case NFS4_SET_TO_SERVER_TIME: 405 iattr->ia_valid |= ATTR_MTIME; 406 break; 407 default: 408 goto xdr_error; 409 } 410 } 411 if (len != expected_len) 412 goto xdr_error; 413 414 DECODE_TAIL; 415 416 out_nfserr: 417 status = nfserrno(host_err); 418 goto out; 419 } 420 421 static __be32 422 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 423 { 424 DECODE_HEAD; 425 426 READ_BUF(4); 427 READ32(access->ac_req_access); 428 429 DECODE_TAIL; 430 } 431 432 static __be32 433 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 434 { 435 DECODE_HEAD; 436 437 close->cl_stateowner = NULL; 438 READ_BUF(4 + sizeof(stateid_t)); 439 READ32(close->cl_seqid); 440 READ32(close->cl_stateid.si_generation); 441 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 442 443 DECODE_TAIL; 444 } 445 446 447 static __be32 448 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 449 { 450 DECODE_HEAD; 451 452 READ_BUF(12); 453 READ64(commit->co_offset); 454 READ32(commit->co_count); 455 456 DECODE_TAIL; 457 } 458 459 static __be32 460 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 461 { 462 DECODE_HEAD; 463 464 READ_BUF(4); 465 READ32(create->cr_type); 466 switch (create->cr_type) { 467 case NF4LNK: 468 READ_BUF(4); 469 READ32(create->cr_linklen); 470 READ_BUF(create->cr_linklen); 471 SAVEMEM(create->cr_linkname, create->cr_linklen); 472 break; 473 case NF4BLK: 474 case NF4CHR: 475 READ_BUF(8); 476 READ32(create->cr_specdata1); 477 READ32(create->cr_specdata2); 478 break; 479 case NF4SOCK: 480 case NF4FIFO: 481 case NF4DIR: 482 default: 483 break; 484 } 485 486 READ_BUF(4); 487 READ32(create->cr_namelen); 488 READ_BUF(create->cr_namelen); 489 SAVEMEM(create->cr_name, create->cr_namelen); 490 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 491 return status; 492 493 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 494 goto out; 495 496 DECODE_TAIL; 497 } 498 499 static inline __be32 500 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 501 { 502 DECODE_HEAD; 503 504 READ_BUF(sizeof(stateid_t)); 505 READ32(dr->dr_stateid.si_generation); 506 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 507 508 DECODE_TAIL; 509 } 510 511 static inline __be32 512 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 513 { 514 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 515 } 516 517 static __be32 518 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 519 { 520 DECODE_HEAD; 521 522 READ_BUF(4); 523 READ32(link->li_namelen); 524 READ_BUF(link->li_namelen); 525 SAVEMEM(link->li_name, link->li_namelen); 526 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 527 return status; 528 529 DECODE_TAIL; 530 } 531 532 static __be32 533 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 534 { 535 DECODE_HEAD; 536 537 lock->lk_replay_owner = NULL; 538 /* 539 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 540 */ 541 READ_BUF(28); 542 READ32(lock->lk_type); 543 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 544 goto xdr_error; 545 READ32(lock->lk_reclaim); 546 READ64(lock->lk_offset); 547 READ64(lock->lk_length); 548 READ32(lock->lk_is_new); 549 550 if (lock->lk_is_new) { 551 READ_BUF(36); 552 READ32(lock->lk_new_open_seqid); 553 READ32(lock->lk_new_open_stateid.si_generation); 554 555 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 556 READ32(lock->lk_new_lock_seqid); 557 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 558 READ32(lock->lk_new_owner.len); 559 READ_BUF(lock->lk_new_owner.len); 560 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 561 } else { 562 READ_BUF(20); 563 READ32(lock->lk_old_lock_stateid.si_generation); 564 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 565 READ32(lock->lk_old_lock_seqid); 566 } 567 568 DECODE_TAIL; 569 } 570 571 static __be32 572 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 573 { 574 DECODE_HEAD; 575 576 READ_BUF(32); 577 READ32(lockt->lt_type); 578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 579 goto xdr_error; 580 READ64(lockt->lt_offset); 581 READ64(lockt->lt_length); 582 COPYMEM(&lockt->lt_clientid, 8); 583 READ32(lockt->lt_owner.len); 584 READ_BUF(lockt->lt_owner.len); 585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 586 587 DECODE_TAIL; 588 } 589 590 static __be32 591 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 592 { 593 DECODE_HEAD; 594 595 locku->lu_stateowner = NULL; 596 READ_BUF(24 + sizeof(stateid_t)); 597 READ32(locku->lu_type); 598 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 599 goto xdr_error; 600 READ32(locku->lu_seqid); 601 READ32(locku->lu_stateid.si_generation); 602 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 603 READ64(locku->lu_offset); 604 READ64(locku->lu_length); 605 606 DECODE_TAIL; 607 } 608 609 static __be32 610 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 611 { 612 DECODE_HEAD; 613 614 READ_BUF(4); 615 READ32(lookup->lo_len); 616 READ_BUF(lookup->lo_len); 617 SAVEMEM(lookup->lo_name, lookup->lo_len); 618 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 619 return status; 620 621 DECODE_TAIL; 622 } 623 624 static __be32 625 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 626 { 627 DECODE_HEAD; 628 629 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 630 open->op_iattr.ia_valid = 0; 631 open->op_stateowner = NULL; 632 633 /* seqid, share_access, share_deny, clientid, ownerlen */ 634 READ_BUF(16 + sizeof(clientid_t)); 635 READ32(open->op_seqid); 636 READ32(open->op_share_access); 637 READ32(open->op_share_deny); 638 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 639 READ32(open->op_owner.len); 640 641 /* owner, open_flag */ 642 READ_BUF(open->op_owner.len + 4); 643 SAVEMEM(open->op_owner.data, open->op_owner.len); 644 READ32(open->op_create); 645 switch (open->op_create) { 646 case NFS4_OPEN_NOCREATE: 647 break; 648 case NFS4_OPEN_CREATE: 649 READ_BUF(4); 650 READ32(open->op_createmode); 651 switch (open->op_createmode) { 652 case NFS4_CREATE_UNCHECKED: 653 case NFS4_CREATE_GUARDED: 654 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 655 goto out; 656 break; 657 case NFS4_CREATE_EXCLUSIVE: 658 READ_BUF(8); 659 COPYMEM(open->op_verf.data, 8); 660 break; 661 default: 662 goto xdr_error; 663 } 664 break; 665 default: 666 goto xdr_error; 667 } 668 669 /* open_claim */ 670 READ_BUF(4); 671 READ32(open->op_claim_type); 672 switch (open->op_claim_type) { 673 case NFS4_OPEN_CLAIM_NULL: 674 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 675 READ_BUF(4); 676 READ32(open->op_fname.len); 677 READ_BUF(open->op_fname.len); 678 SAVEMEM(open->op_fname.data, open->op_fname.len); 679 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 680 return status; 681 break; 682 case NFS4_OPEN_CLAIM_PREVIOUS: 683 READ_BUF(4); 684 READ32(open->op_delegate_type); 685 break; 686 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 687 READ_BUF(sizeof(stateid_t) + 4); 688 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 689 READ32(open->op_fname.len); 690 READ_BUF(open->op_fname.len); 691 SAVEMEM(open->op_fname.data, open->op_fname.len); 692 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 693 return status; 694 break; 695 default: 696 goto xdr_error; 697 } 698 699 DECODE_TAIL; 700 } 701 702 static __be32 703 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 704 { 705 DECODE_HEAD; 706 707 open_conf->oc_stateowner = NULL; 708 READ_BUF(4 + sizeof(stateid_t)); 709 READ32(open_conf->oc_req_stateid.si_generation); 710 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 711 READ32(open_conf->oc_seqid); 712 713 DECODE_TAIL; 714 } 715 716 static __be32 717 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 718 { 719 DECODE_HEAD; 720 721 open_down->od_stateowner = NULL; 722 READ_BUF(12 + sizeof(stateid_t)); 723 READ32(open_down->od_stateid.si_generation); 724 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 725 READ32(open_down->od_seqid); 726 READ32(open_down->od_share_access); 727 READ32(open_down->od_share_deny); 728 729 DECODE_TAIL; 730 } 731 732 static __be32 733 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 734 { 735 DECODE_HEAD; 736 737 READ_BUF(4); 738 READ32(putfh->pf_fhlen); 739 if (putfh->pf_fhlen > NFS4_FHSIZE) 740 goto xdr_error; 741 READ_BUF(putfh->pf_fhlen); 742 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 743 744 DECODE_TAIL; 745 } 746 747 static __be32 748 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 749 { 750 DECODE_HEAD; 751 752 READ_BUF(sizeof(stateid_t) + 12); 753 READ32(read->rd_stateid.si_generation); 754 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 755 READ64(read->rd_offset); 756 READ32(read->rd_length); 757 758 DECODE_TAIL; 759 } 760 761 static __be32 762 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 763 { 764 DECODE_HEAD; 765 766 READ_BUF(24); 767 READ64(readdir->rd_cookie); 768 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 769 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 770 READ32(readdir->rd_maxcount); 771 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 772 goto out; 773 774 DECODE_TAIL; 775 } 776 777 static __be32 778 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 779 { 780 DECODE_HEAD; 781 782 READ_BUF(4); 783 READ32(remove->rm_namelen); 784 READ_BUF(remove->rm_namelen); 785 SAVEMEM(remove->rm_name, remove->rm_namelen); 786 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 787 return status; 788 789 DECODE_TAIL; 790 } 791 792 static __be32 793 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 794 { 795 DECODE_HEAD; 796 797 READ_BUF(4); 798 READ32(rename->rn_snamelen); 799 READ_BUF(rename->rn_snamelen + 4); 800 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 801 READ32(rename->rn_tnamelen); 802 READ_BUF(rename->rn_tnamelen); 803 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 804 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 805 return status; 806 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 807 return status; 808 809 DECODE_TAIL; 810 } 811 812 static __be32 813 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 814 { 815 DECODE_HEAD; 816 817 READ_BUF(sizeof(clientid_t)); 818 COPYMEM(clientid, sizeof(clientid_t)); 819 820 DECODE_TAIL; 821 } 822 823 static __be32 824 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 825 struct nfsd4_secinfo *secinfo) 826 { 827 DECODE_HEAD; 828 829 READ_BUF(4); 830 READ32(secinfo->si_namelen); 831 READ_BUF(secinfo->si_namelen); 832 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 833 status = check_filename(secinfo->si_name, secinfo->si_namelen, 834 nfserr_noent); 835 if (status) 836 return status; 837 DECODE_TAIL; 838 } 839 840 static __be32 841 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 842 { 843 DECODE_HEAD; 844 845 READ_BUF(sizeof(stateid_t)); 846 READ32(setattr->sa_stateid.si_generation); 847 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 848 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 849 goto out; 850 851 DECODE_TAIL; 852 } 853 854 static __be32 855 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 856 { 857 DECODE_HEAD; 858 859 READ_BUF(12); 860 COPYMEM(setclientid->se_verf.data, 8); 861 READ32(setclientid->se_namelen); 862 863 READ_BUF(setclientid->se_namelen + 8); 864 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 865 READ32(setclientid->se_callback_prog); 866 READ32(setclientid->se_callback_netid_len); 867 868 READ_BUF(setclientid->se_callback_netid_len + 4); 869 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 870 READ32(setclientid->se_callback_addr_len); 871 872 READ_BUF(setclientid->se_callback_addr_len + 4); 873 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 874 READ32(setclientid->se_callback_ident); 875 876 DECODE_TAIL; 877 } 878 879 static __be32 880 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 881 { 882 DECODE_HEAD; 883 884 READ_BUF(8 + sizeof(nfs4_verifier)); 885 COPYMEM(&scd_c->sc_clientid, 8); 886 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 887 888 DECODE_TAIL; 889 } 890 891 /* Also used for NVERIFY */ 892 static __be32 893 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 894 { 895 #if 0 896 struct nfsd4_compoundargs save = { 897 .p = argp->p, 898 .end = argp->end, 899 .rqstp = argp->rqstp, 900 }; 901 u32 ve_bmval[2]; 902 struct iattr ve_iattr; /* request */ 903 struct nfs4_acl *ve_acl; /* request */ 904 #endif 905 DECODE_HEAD; 906 907 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 908 goto out; 909 910 /* For convenience's sake, we compare raw xdr'd attributes in 911 * nfsd4_proc_verify; however we still decode here just to return 912 * correct error in case of bad xdr. */ 913 #if 0 914 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 915 if (status == nfserr_inval) { 916 status = nfserrno(status); 917 goto out; 918 } 919 #endif 920 READ_BUF(4); 921 READ32(verify->ve_attrlen); 922 READ_BUF(verify->ve_attrlen); 923 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 924 925 DECODE_TAIL; 926 } 927 928 static __be32 929 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 930 { 931 int avail; 932 int v; 933 int len; 934 DECODE_HEAD; 935 936 READ_BUF(sizeof(stateid_opaque_t) + 20); 937 READ32(write->wr_stateid.si_generation); 938 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 939 READ64(write->wr_offset); 940 READ32(write->wr_stable_how); 941 if (write->wr_stable_how > 2) 942 goto xdr_error; 943 READ32(write->wr_buflen); 944 945 /* Sorry .. no magic macros for this.. * 946 * READ_BUF(write->wr_buflen); 947 * SAVEMEM(write->wr_buf, write->wr_buflen); 948 */ 949 avail = (char*)argp->end - (char*)argp->p; 950 if (avail + argp->pagelen < write->wr_buflen) { 951 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); 952 goto xdr_error; 953 } 954 argp->rqstp->rq_vec[0].iov_base = p; 955 argp->rqstp->rq_vec[0].iov_len = avail; 956 v = 0; 957 len = write->wr_buflen; 958 while (len > argp->rqstp->rq_vec[v].iov_len) { 959 len -= argp->rqstp->rq_vec[v].iov_len; 960 v++; 961 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 962 argp->pagelist++; 963 if (argp->pagelen >= PAGE_SIZE) { 964 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 965 argp->pagelen -= PAGE_SIZE; 966 } else { 967 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 968 argp->pagelen -= len; 969 } 970 } 971 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 972 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 973 argp->rqstp->rq_vec[v].iov_len = len; 974 write->wr_vlen = v+1; 975 976 DECODE_TAIL; 977 } 978 979 static __be32 980 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 981 { 982 DECODE_HEAD; 983 984 READ_BUF(12); 985 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 986 READ32(rlockowner->rl_owner.len); 987 READ_BUF(rlockowner->rl_owner.len); 988 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 989 990 DECODE_TAIL; 991 } 992 993 static __be32 994 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 995 { 996 DECODE_HEAD; 997 struct nfsd4_op *op; 998 int i; 999 1000 /* 1001 * XXX: According to spec, we should check the tag 1002 * for UTF-8 compliance. I'm postponing this for 1003 * now because it seems that some clients do use 1004 * binary tags. 1005 */ 1006 READ_BUF(4); 1007 READ32(argp->taglen); 1008 READ_BUF(argp->taglen + 8); 1009 SAVEMEM(argp->tag, argp->taglen); 1010 READ32(argp->minorversion); 1011 READ32(argp->opcnt); 1012 1013 if (argp->taglen > NFSD4_MAX_TAGLEN) 1014 goto xdr_error; 1015 if (argp->opcnt > 100) 1016 goto xdr_error; 1017 1018 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1019 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1020 if (!argp->ops) { 1021 argp->ops = argp->iops; 1022 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n"); 1023 goto xdr_error; 1024 } 1025 } 1026 1027 for (i = 0; i < argp->opcnt; i++) { 1028 op = &argp->ops[i]; 1029 op->replay = NULL; 1030 1031 /* 1032 * We can't use READ_BUF() here because we need to handle 1033 * a missing opcode as an OP_WRITE + 1. So we need to check 1034 * to see if we're truly at the end of our buffer or if there 1035 * is another page we need to flip to. 1036 */ 1037 1038 if (argp->p == argp->end) { 1039 if (argp->pagelen < 4) { 1040 /* There isn't an opcode still on the wire */ 1041 op->opnum = OP_WRITE + 1; 1042 op->status = nfserr_bad_xdr; 1043 argp->opcnt = i+1; 1044 break; 1045 } 1046 1047 /* 1048 * False alarm. We just hit a page boundary, but there 1049 * is still data available. Move pointer across page 1050 * boundary. *snip from READ_BUF* 1051 */ 1052 argp->p = page_address(argp->pagelist[0]); 1053 argp->pagelist++; 1054 if (argp->pagelen < PAGE_SIZE) { 1055 argp->end = p + (argp->pagelen>>2); 1056 argp->pagelen = 0; 1057 } else { 1058 argp->end = p + (PAGE_SIZE>>2); 1059 argp->pagelen -= PAGE_SIZE; 1060 } 1061 } 1062 op->opnum = ntohl(*argp->p++); 1063 1064 switch (op->opnum) { 1065 case 2: /* Reserved operation */ 1066 op->opnum = OP_ILLEGAL; 1067 if (argp->minorversion == 0) 1068 op->status = nfserr_op_illegal; 1069 else 1070 op->status = nfserr_minor_vers_mismatch; 1071 break; 1072 case OP_ACCESS: 1073 op->status = nfsd4_decode_access(argp, &op->u.access); 1074 break; 1075 case OP_CLOSE: 1076 op->status = nfsd4_decode_close(argp, &op->u.close); 1077 break; 1078 case OP_COMMIT: 1079 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1080 break; 1081 case OP_CREATE: 1082 op->status = nfsd4_decode_create(argp, &op->u.create); 1083 break; 1084 case OP_DELEGRETURN: 1085 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1086 break; 1087 case OP_GETATTR: 1088 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1089 break; 1090 case OP_GETFH: 1091 op->status = nfs_ok; 1092 break; 1093 case OP_LINK: 1094 op->status = nfsd4_decode_link(argp, &op->u.link); 1095 break; 1096 case OP_LOCK: 1097 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1098 break; 1099 case OP_LOCKT: 1100 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1101 break; 1102 case OP_LOCKU: 1103 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1104 break; 1105 case OP_LOOKUP: 1106 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1107 break; 1108 case OP_LOOKUPP: 1109 op->status = nfs_ok; 1110 break; 1111 case OP_NVERIFY: 1112 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1113 break; 1114 case OP_OPEN: 1115 op->status = nfsd4_decode_open(argp, &op->u.open); 1116 break; 1117 case OP_OPEN_CONFIRM: 1118 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1119 break; 1120 case OP_OPEN_DOWNGRADE: 1121 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1122 break; 1123 case OP_PUTFH: 1124 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1125 break; 1126 case OP_PUTROOTFH: 1127 op->status = nfs_ok; 1128 break; 1129 case OP_READ: 1130 op->status = nfsd4_decode_read(argp, &op->u.read); 1131 break; 1132 case OP_READDIR: 1133 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1134 break; 1135 case OP_READLINK: 1136 op->status = nfs_ok; 1137 break; 1138 case OP_REMOVE: 1139 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1140 break; 1141 case OP_RENAME: 1142 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1143 break; 1144 case OP_RESTOREFH: 1145 op->status = nfs_ok; 1146 break; 1147 case OP_RENEW: 1148 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1149 break; 1150 case OP_SAVEFH: 1151 op->status = nfs_ok; 1152 break; 1153 case OP_SECINFO: 1154 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo); 1155 break; 1156 case OP_SETATTR: 1157 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1158 break; 1159 case OP_SETCLIENTID: 1160 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1161 break; 1162 case OP_SETCLIENTID_CONFIRM: 1163 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1164 break; 1165 case OP_VERIFY: 1166 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1167 break; 1168 case OP_WRITE: 1169 op->status = nfsd4_decode_write(argp, &op->u.write); 1170 break; 1171 case OP_RELEASE_LOCKOWNER: 1172 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1173 break; 1174 default: 1175 op->opnum = OP_ILLEGAL; 1176 op->status = nfserr_op_illegal; 1177 break; 1178 } 1179 1180 if (op->status) { 1181 argp->opcnt = i+1; 1182 break; 1183 } 1184 } 1185 1186 DECODE_TAIL; 1187 } 1188 /* 1189 * END OF "GENERIC" DECODE ROUTINES. 1190 */ 1191 1192 /* 1193 * START OF "GENERIC" ENCODE ROUTINES. 1194 * These may look a little ugly since they are imported from a "generic" 1195 * set of XDR encode/decode routines which are intended to be shared by 1196 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1197 * 1198 * If the pain of reading these is too great, it should be a straightforward 1199 * task to translate them into Linux-specific versions which are more 1200 * consistent with the style used in NFSv2/v3... 1201 */ 1202 #define ENCODE_HEAD __be32 *p 1203 1204 #define WRITE32(n) *p++ = htonl(n) 1205 #define WRITE64(n) do { \ 1206 *p++ = htonl((u32)((n) >> 32)); \ 1207 *p++ = htonl((u32)(n)); \ 1208 } while (0) 1209 #define WRITEMEM(ptr,nbytes) do { \ 1210 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1211 memcpy(p, ptr, nbytes); \ 1212 p += XDR_QUADLEN(nbytes); \ 1213 } while (0) 1214 #define WRITECINFO(c) do { \ 1215 *p++ = htonl(c.atomic); \ 1216 *p++ = htonl(c.before_ctime_sec); \ 1217 *p++ = htonl(c.before_ctime_nsec); \ 1218 *p++ = htonl(c.after_ctime_sec); \ 1219 *p++ = htonl(c.after_ctime_nsec); \ 1220 } while (0) 1221 1222 #define RESERVE_SPACE(nbytes) do { \ 1223 p = resp->p; \ 1224 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1225 } while (0) 1226 #define ADJUST_ARGS() resp->p = p 1227 1228 /* 1229 * Header routine to setup seqid operation replay cache 1230 */ 1231 #define ENCODE_SEQID_OP_HEAD \ 1232 __be32 *p; \ 1233 __be32 *save; \ 1234 \ 1235 save = resp->p; 1236 1237 /* 1238 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1239 * is where sequence id's are incremented, and the replay cache is filled. 1240 * Note that we increment sequence id's here, at the last moment, so we're sure 1241 * we know whether the error to be returned is a sequence id mutating error. 1242 */ 1243 1244 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1245 if (seqid_mutating_err(nfserr) && stateowner) { \ 1246 stateowner->so_seqid++; \ 1247 stateowner->so_replay.rp_status = nfserr; \ 1248 stateowner->so_replay.rp_buflen = \ 1249 (((char *)(resp)->p - (char *)save)); \ 1250 memcpy(stateowner->so_replay.rp_buf, save, \ 1251 stateowner->so_replay.rp_buflen); \ 1252 } } while (0); 1253 1254 /* Encode as an array of strings the string given with components 1255 * seperated @sep. 1256 */ 1257 static __be32 nfsd4_encode_components(char sep, char *components, 1258 __be32 **pp, int *buflen) 1259 { 1260 __be32 *p = *pp; 1261 __be32 *countp = p; 1262 int strlen, count=0; 1263 char *str, *end; 1264 1265 dprintk("nfsd4_encode_components(%s)\n", components); 1266 if ((*buflen -= 4) < 0) 1267 return nfserr_resource; 1268 WRITE32(0); /* We will fill this in with @count later */ 1269 end = str = components; 1270 while (*end) { 1271 for (; *end && (*end != sep); end++) 1272 ; /* Point to end of component */ 1273 strlen = end - str; 1274 if (strlen) { 1275 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1276 return nfserr_resource; 1277 WRITE32(strlen); 1278 WRITEMEM(str, strlen); 1279 count++; 1280 } 1281 else 1282 end++; 1283 str = end; 1284 } 1285 *pp = p; 1286 p = countp; 1287 WRITE32(count); 1288 return 0; 1289 } 1290 1291 /* 1292 * encode a location element of a fs_locations structure 1293 */ 1294 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1295 __be32 **pp, int *buflen) 1296 { 1297 __be32 status; 1298 __be32 *p = *pp; 1299 1300 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1301 if (status) 1302 return status; 1303 status = nfsd4_encode_components('/', location->path, &p, buflen); 1304 if (status) 1305 return status; 1306 *pp = p; 1307 return 0; 1308 } 1309 1310 /* 1311 * Return the path to an export point in the pseudo filesystem namespace 1312 * Returned string is safe to use as long as the caller holds a reference 1313 * to @exp. 1314 */ 1315 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1316 { 1317 struct svc_fh tmp_fh; 1318 char *path, *rootpath; 1319 1320 fh_init(&tmp_fh, NFS4_FHSIZE); 1321 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1322 if (*stat) 1323 return NULL; 1324 rootpath = tmp_fh.fh_export->ex_path; 1325 1326 path = exp->ex_path; 1327 1328 if (strncmp(path, rootpath, strlen(rootpath))) { 1329 printk("nfsd: fs_locations failed;" 1330 "%s is not contained in %s\n", path, rootpath); 1331 *stat = nfserr_notsupp; 1332 return NULL; 1333 } 1334 1335 return path + strlen(rootpath); 1336 } 1337 1338 /* 1339 * encode a fs_locations structure 1340 */ 1341 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1342 struct svc_export *exp, 1343 __be32 **pp, int *buflen) 1344 { 1345 __be32 status; 1346 int i; 1347 __be32 *p = *pp; 1348 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1349 char *root = nfsd4_path(rqstp, exp, &status); 1350 1351 if (status) 1352 return status; 1353 status = nfsd4_encode_components('/', root, &p, buflen); 1354 if (status) 1355 return status; 1356 if ((*buflen -= 4) < 0) 1357 return nfserr_resource; 1358 WRITE32(fslocs->locations_count); 1359 for (i=0; i<fslocs->locations_count; i++) { 1360 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1361 &p, buflen); 1362 if (status) 1363 return status; 1364 } 1365 *pp = p; 1366 return 0; 1367 } 1368 1369 static u32 nfs4_ftypes[16] = { 1370 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1371 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1372 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1373 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1374 }; 1375 1376 static __be32 1377 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1378 __be32 **p, int *buflen) 1379 { 1380 int status; 1381 1382 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1383 return nfserr_resource; 1384 if (whotype != NFS4_ACL_WHO_NAMED) 1385 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1386 else if (group) 1387 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1388 else 1389 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1390 if (status < 0) 1391 return nfserrno(status); 1392 *p = xdr_encode_opaque(*p, NULL, status); 1393 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1394 BUG_ON(*buflen < 0); 1395 return 0; 1396 } 1397 1398 static inline __be32 1399 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1400 { 1401 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1402 } 1403 1404 static inline __be32 1405 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1406 { 1407 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1408 } 1409 1410 static inline __be32 1411 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1412 __be32 **p, int *buflen) 1413 { 1414 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1415 } 1416 1417 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1418 FATTR4_WORD0_RDATTR_ERROR) 1419 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1420 1421 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1422 { 1423 /* As per referral draft: */ 1424 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1425 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1426 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1427 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1428 *rdattr_err = NFSERR_MOVED; 1429 else 1430 return nfserr_moved; 1431 } 1432 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1433 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1434 return 0; 1435 } 1436 1437 /* 1438 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1439 * ourselves. 1440 * 1441 * @countp is the buffer size in _words_; upon successful return this becomes 1442 * replaced with the number of words written. 1443 */ 1444 __be32 1445 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1446 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1447 struct svc_rqst *rqstp) 1448 { 1449 u32 bmval0 = bmval[0]; 1450 u32 bmval1 = bmval[1]; 1451 struct kstat stat; 1452 struct svc_fh tempfh; 1453 struct kstatfs statfs; 1454 int buflen = *countp << 2; 1455 __be32 *attrlenp; 1456 u32 dummy; 1457 u64 dummy64; 1458 u32 rdattr_err = 0; 1459 __be32 *p = buffer; 1460 __be32 status; 1461 int err; 1462 int aclsupport = 0; 1463 struct nfs4_acl *acl = NULL; 1464 1465 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1466 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1467 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1468 1469 if (exp->ex_fslocs.migrated) { 1470 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1471 if (status) 1472 goto out; 1473 } 1474 1475 err = vfs_getattr(exp->ex_mnt, dentry, &stat); 1476 if (err) 1477 goto out_nfserr; 1478 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) || 1479 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1480 FATTR4_WORD1_SPACE_TOTAL))) { 1481 err = vfs_statfs(dentry, &statfs); 1482 if (err) 1483 goto out_nfserr; 1484 } 1485 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1486 fh_init(&tempfh, NFS4_FHSIZE); 1487 status = fh_compose(&tempfh, exp, dentry, NULL); 1488 if (status) 1489 goto out; 1490 fhp = &tempfh; 1491 } 1492 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1493 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1494 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1495 aclsupport = (err == 0); 1496 if (bmval0 & FATTR4_WORD0_ACL) { 1497 if (err == -EOPNOTSUPP) 1498 bmval0 &= ~FATTR4_WORD0_ACL; 1499 else if (err == -EINVAL) { 1500 status = nfserr_attrnotsupp; 1501 goto out; 1502 } else if (err != 0) 1503 goto out_nfserr; 1504 } 1505 } 1506 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1507 if (exp->ex_fslocs.locations == NULL) { 1508 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1509 } 1510 } 1511 if ((buflen -= 16) < 0) 1512 goto out_resource; 1513 1514 WRITE32(2); 1515 WRITE32(bmval0); 1516 WRITE32(bmval1); 1517 attrlenp = p++; /* to be backfilled later */ 1518 1519 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1520 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1521 if ((buflen -= 12) < 0) 1522 goto out_resource; 1523 if (!aclsupport) 1524 word0 &= ~FATTR4_WORD0_ACL; 1525 if (!exp->ex_fslocs.locations) 1526 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1527 WRITE32(2); 1528 WRITE32(word0); 1529 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1530 } 1531 if (bmval0 & FATTR4_WORD0_TYPE) { 1532 if ((buflen -= 4) < 0) 1533 goto out_resource; 1534 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1535 if (dummy == NF4BAD) 1536 goto out_serverfault; 1537 WRITE32(dummy); 1538 } 1539 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1540 if ((buflen -= 4) < 0) 1541 goto out_resource; 1542 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1543 WRITE32(NFS4_FH_PERSISTENT); 1544 else 1545 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1546 } 1547 if (bmval0 & FATTR4_WORD0_CHANGE) { 1548 /* 1549 * Note: This _must_ be consistent with the scheme for writing 1550 * change_info, so any changes made here must be reflected there 1551 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1552 * macro above.) 1553 */ 1554 if ((buflen -= 8) < 0) 1555 goto out_resource; 1556 WRITE32(stat.ctime.tv_sec); 1557 WRITE32(stat.ctime.tv_nsec); 1558 } 1559 if (bmval0 & FATTR4_WORD0_SIZE) { 1560 if ((buflen -= 8) < 0) 1561 goto out_resource; 1562 WRITE64(stat.size); 1563 } 1564 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1565 if ((buflen -= 4) < 0) 1566 goto out_resource; 1567 WRITE32(1); 1568 } 1569 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1570 if ((buflen -= 4) < 0) 1571 goto out_resource; 1572 WRITE32(1); 1573 } 1574 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1575 if ((buflen -= 4) < 0) 1576 goto out_resource; 1577 WRITE32(0); 1578 } 1579 if (bmval0 & FATTR4_WORD0_FSID) { 1580 if ((buflen -= 16) < 0) 1581 goto out_resource; 1582 if (exp->ex_fslocs.migrated) { 1583 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1584 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1585 } else switch(fsid_source(fhp)) { 1586 case FSIDSOURCE_FSID: 1587 WRITE64((u64)exp->ex_fsid); 1588 WRITE64((u64)0); 1589 break; 1590 case FSIDSOURCE_DEV: 1591 WRITE32(0); 1592 WRITE32(MAJOR(stat.dev)); 1593 WRITE32(0); 1594 WRITE32(MINOR(stat.dev)); 1595 break; 1596 case FSIDSOURCE_UUID: 1597 WRITEMEM(exp->ex_uuid, 16); 1598 break; 1599 } 1600 } 1601 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1602 if ((buflen -= 4) < 0) 1603 goto out_resource; 1604 WRITE32(0); 1605 } 1606 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1607 if ((buflen -= 4) < 0) 1608 goto out_resource; 1609 WRITE32(NFSD_LEASE_TIME); 1610 } 1611 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1612 if ((buflen -= 4) < 0) 1613 goto out_resource; 1614 WRITE32(rdattr_err); 1615 } 1616 if (bmval0 & FATTR4_WORD0_ACL) { 1617 struct nfs4_ace *ace; 1618 1619 if (acl == NULL) { 1620 if ((buflen -= 4) < 0) 1621 goto out_resource; 1622 1623 WRITE32(0); 1624 goto out_acl; 1625 } 1626 if ((buflen -= 4) < 0) 1627 goto out_resource; 1628 WRITE32(acl->naces); 1629 1630 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1631 if ((buflen -= 4*3) < 0) 1632 goto out_resource; 1633 WRITE32(ace->type); 1634 WRITE32(ace->flag); 1635 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1636 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1637 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1638 &p, &buflen); 1639 if (status == nfserr_resource) 1640 goto out_resource; 1641 if (status) 1642 goto out; 1643 } 1644 } 1645 out_acl: 1646 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1647 if ((buflen -= 4) < 0) 1648 goto out_resource; 1649 WRITE32(aclsupport ? 1650 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1651 } 1652 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1653 if ((buflen -= 4) < 0) 1654 goto out_resource; 1655 WRITE32(1); 1656 } 1657 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1658 if ((buflen -= 4) < 0) 1659 goto out_resource; 1660 WRITE32(1); 1661 } 1662 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1663 if ((buflen -= 4) < 0) 1664 goto out_resource; 1665 WRITE32(1); 1666 } 1667 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1668 if ((buflen -= 4) < 0) 1669 goto out_resource; 1670 WRITE32(1); 1671 } 1672 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1673 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1674 if (buflen < 0) 1675 goto out_resource; 1676 WRITE32(fhp->fh_handle.fh_size); 1677 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1678 } 1679 if (bmval0 & FATTR4_WORD0_FILEID) { 1680 if ((buflen -= 8) < 0) 1681 goto out_resource; 1682 WRITE64((u64) stat.ino); 1683 } 1684 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1685 if ((buflen -= 8) < 0) 1686 goto out_resource; 1687 WRITE64((u64) statfs.f_ffree); 1688 } 1689 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1690 if ((buflen -= 8) < 0) 1691 goto out_resource; 1692 WRITE64((u64) statfs.f_ffree); 1693 } 1694 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1695 if ((buflen -= 8) < 0) 1696 goto out_resource; 1697 WRITE64((u64) statfs.f_files); 1698 } 1699 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1700 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1701 if (status == nfserr_resource) 1702 goto out_resource; 1703 if (status) 1704 goto out; 1705 } 1706 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1707 if ((buflen -= 4) < 0) 1708 goto out_resource; 1709 WRITE32(1); 1710 } 1711 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1712 if ((buflen -= 8) < 0) 1713 goto out_resource; 1714 WRITE64(~(u64)0); 1715 } 1716 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1717 if ((buflen -= 4) < 0) 1718 goto out_resource; 1719 WRITE32(255); 1720 } 1721 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1722 if ((buflen -= 4) < 0) 1723 goto out_resource; 1724 WRITE32(~(u32) 0); 1725 } 1726 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1727 if ((buflen -= 8) < 0) 1728 goto out_resource; 1729 WRITE64((u64) svc_max_payload(rqstp)); 1730 } 1731 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1732 if ((buflen -= 8) < 0) 1733 goto out_resource; 1734 WRITE64((u64) svc_max_payload(rqstp)); 1735 } 1736 if (bmval1 & FATTR4_WORD1_MODE) { 1737 if ((buflen -= 4) < 0) 1738 goto out_resource; 1739 WRITE32(stat.mode & S_IALLUGO); 1740 } 1741 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1742 if ((buflen -= 4) < 0) 1743 goto out_resource; 1744 WRITE32(1); 1745 } 1746 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1747 if ((buflen -= 4) < 0) 1748 goto out_resource; 1749 WRITE32(stat.nlink); 1750 } 1751 if (bmval1 & FATTR4_WORD1_OWNER) { 1752 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1753 if (status == nfserr_resource) 1754 goto out_resource; 1755 if (status) 1756 goto out; 1757 } 1758 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1759 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1760 if (status == nfserr_resource) 1761 goto out_resource; 1762 if (status) 1763 goto out; 1764 } 1765 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1766 if ((buflen -= 8) < 0) 1767 goto out_resource; 1768 WRITE32((u32) MAJOR(stat.rdev)); 1769 WRITE32((u32) MINOR(stat.rdev)); 1770 } 1771 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1772 if ((buflen -= 8) < 0) 1773 goto out_resource; 1774 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1775 WRITE64(dummy64); 1776 } 1777 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1778 if ((buflen -= 8) < 0) 1779 goto out_resource; 1780 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1781 WRITE64(dummy64); 1782 } 1783 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1784 if ((buflen -= 8) < 0) 1785 goto out_resource; 1786 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1787 WRITE64(dummy64); 1788 } 1789 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1790 if ((buflen -= 8) < 0) 1791 goto out_resource; 1792 dummy64 = (u64)stat.blocks << 9; 1793 WRITE64(dummy64); 1794 } 1795 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1796 if ((buflen -= 12) < 0) 1797 goto out_resource; 1798 WRITE32(0); 1799 WRITE32(stat.atime.tv_sec); 1800 WRITE32(stat.atime.tv_nsec); 1801 } 1802 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1803 if ((buflen -= 12) < 0) 1804 goto out_resource; 1805 WRITE32(0); 1806 WRITE32(1); 1807 WRITE32(0); 1808 } 1809 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1810 if ((buflen -= 12) < 0) 1811 goto out_resource; 1812 WRITE32(0); 1813 WRITE32(stat.ctime.tv_sec); 1814 WRITE32(stat.ctime.tv_nsec); 1815 } 1816 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1817 if ((buflen -= 12) < 0) 1818 goto out_resource; 1819 WRITE32(0); 1820 WRITE32(stat.mtime.tv_sec); 1821 WRITE32(stat.mtime.tv_nsec); 1822 } 1823 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1824 struct dentry *mnt_pnt, *mnt_root; 1825 1826 if ((buflen -= 8) < 0) 1827 goto out_resource; 1828 mnt_root = exp->ex_mnt->mnt_root; 1829 if (mnt_root->d_inode == dentry->d_inode) { 1830 mnt_pnt = exp->ex_mnt->mnt_mountpoint; 1831 WRITE64((u64) mnt_pnt->d_inode->i_ino); 1832 } else 1833 WRITE64((u64) stat.ino); 1834 } 1835 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1836 *countp = p - buffer; 1837 status = nfs_ok; 1838 1839 out: 1840 kfree(acl); 1841 if (fhp == &tempfh) 1842 fh_put(&tempfh); 1843 return status; 1844 out_nfserr: 1845 status = nfserrno(err); 1846 goto out; 1847 out_resource: 1848 *countp = 0; 1849 status = nfserr_resource; 1850 goto out; 1851 out_serverfault: 1852 status = nfserr_serverfault; 1853 goto out; 1854 } 1855 1856 static __be32 1857 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1858 const char *name, int namlen, __be32 *p, int *buflen) 1859 { 1860 struct svc_export *exp = cd->rd_fhp->fh_export; 1861 struct dentry *dentry; 1862 __be32 nfserr; 1863 1864 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1865 if (IS_ERR(dentry)) 1866 return nfserrno(PTR_ERR(dentry)); 1867 1868 exp_get(exp); 1869 if (d_mountpoint(dentry)) { 1870 int err; 1871 1872 /* 1873 * Why the heck aren't we just using nfsd_lookup?? 1874 * Different "."/".." handling? Something else? 1875 * At least, add a comment here to explain.... 1876 */ 1877 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1878 if (err) { 1879 nfserr = nfserrno(err); 1880 goto out_put; 1881 } 1882 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 1883 if (nfserr) 1884 goto out_put; 1885 1886 } 1887 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1888 cd->rd_rqstp); 1889 out_put: 1890 dput(dentry); 1891 exp_put(exp); 1892 return nfserr; 1893 } 1894 1895 static __be32 * 1896 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1897 { 1898 __be32 *attrlenp; 1899 1900 if (buflen < 6) 1901 return NULL; 1902 *p++ = htonl(2); 1903 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1904 *p++ = htonl(0); /* bmval1 */ 1905 1906 attrlenp = p++; 1907 *p++ = nfserr; /* no htonl */ 1908 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1909 return p; 1910 } 1911 1912 static int 1913 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1914 loff_t offset, u64 ino, unsigned int d_type) 1915 { 1916 struct readdir_cd *ccd = ccdv; 1917 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1918 int buflen; 1919 __be32 *p = cd->buffer; 1920 __be32 nfserr = nfserr_toosmall; 1921 1922 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1923 if (name && isdotent(name, namlen)) { 1924 cd->common.err = nfs_ok; 1925 return 0; 1926 } 1927 1928 if (cd->offset) 1929 xdr_encode_hyper(cd->offset, (u64) offset); 1930 1931 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1932 if (buflen < 0) 1933 goto fail; 1934 1935 *p++ = xdr_one; /* mark entry present */ 1936 cd->offset = p; /* remember pointer */ 1937 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1938 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1939 1940 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1941 switch (nfserr) { 1942 case nfs_ok: 1943 p += buflen; 1944 break; 1945 case nfserr_resource: 1946 nfserr = nfserr_toosmall; 1947 goto fail; 1948 case nfserr_dropit: 1949 goto fail; 1950 default: 1951 /* 1952 * If the client requested the RDATTR_ERROR attribute, 1953 * we stuff the error code into this attribute 1954 * and continue. If this attribute was not requested, 1955 * then in accordance with the spec, we fail the 1956 * entire READDIR operation(!) 1957 */ 1958 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1959 goto fail; 1960 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1961 if (p == NULL) { 1962 nfserr = nfserr_toosmall; 1963 goto fail; 1964 } 1965 } 1966 cd->buflen -= (p - cd->buffer); 1967 cd->buffer = p; 1968 cd->common.err = nfs_ok; 1969 return 0; 1970 fail: 1971 cd->common.err = nfserr; 1972 return -EINVAL; 1973 } 1974 1975 static void 1976 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 1977 { 1978 ENCODE_HEAD; 1979 1980 if (!nfserr) { 1981 RESERVE_SPACE(8); 1982 WRITE32(access->ac_supported); 1983 WRITE32(access->ac_resp_access); 1984 ADJUST_ARGS(); 1985 } 1986 } 1987 1988 static void 1989 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 1990 { 1991 ENCODE_SEQID_OP_HEAD; 1992 1993 if (!nfserr) { 1994 RESERVE_SPACE(sizeof(stateid_t)); 1995 WRITE32(close->cl_stateid.si_generation); 1996 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 1997 ADJUST_ARGS(); 1998 } 1999 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2000 } 2001 2002 2003 static void 2004 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2005 { 2006 ENCODE_HEAD; 2007 2008 if (!nfserr) { 2009 RESERVE_SPACE(8); 2010 WRITEMEM(commit->co_verf.data, 8); 2011 ADJUST_ARGS(); 2012 } 2013 } 2014 2015 static void 2016 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2017 { 2018 ENCODE_HEAD; 2019 2020 if (!nfserr) { 2021 RESERVE_SPACE(32); 2022 WRITECINFO(create->cr_cinfo); 2023 WRITE32(2); 2024 WRITE32(create->cr_bmval[0]); 2025 WRITE32(create->cr_bmval[1]); 2026 ADJUST_ARGS(); 2027 } 2028 } 2029 2030 static __be32 2031 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2032 { 2033 struct svc_fh *fhp = getattr->ga_fhp; 2034 int buflen; 2035 2036 if (nfserr) 2037 return nfserr; 2038 2039 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2040 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2041 resp->p, &buflen, getattr->ga_bmval, 2042 resp->rqstp); 2043 if (!nfserr) 2044 resp->p += buflen; 2045 return nfserr; 2046 } 2047 2048 static void 2049 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2050 { 2051 unsigned int len; 2052 ENCODE_HEAD; 2053 2054 if (!nfserr) { 2055 len = fhp->fh_handle.fh_size; 2056 RESERVE_SPACE(len + 4); 2057 WRITE32(len); 2058 WRITEMEM(&fhp->fh_handle.fh_base, len); 2059 ADJUST_ARGS(); 2060 } 2061 } 2062 2063 /* 2064 * Including all fields other than the name, a LOCK4denied structure requires 2065 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2066 */ 2067 static void 2068 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2069 { 2070 ENCODE_HEAD; 2071 2072 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2073 WRITE64(ld->ld_start); 2074 WRITE64(ld->ld_length); 2075 WRITE32(ld->ld_type); 2076 if (ld->ld_sop) { 2077 WRITEMEM(&ld->ld_clientid, 8); 2078 WRITE32(ld->ld_sop->so_owner.len); 2079 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2080 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2081 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2082 WRITE64((u64)0); /* clientid */ 2083 WRITE32(0); /* length of owner name */ 2084 } 2085 ADJUST_ARGS(); 2086 } 2087 2088 static void 2089 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2090 { 2091 ENCODE_SEQID_OP_HEAD; 2092 2093 if (!nfserr) { 2094 RESERVE_SPACE(4 + sizeof(stateid_t)); 2095 WRITE32(lock->lk_resp_stateid.si_generation); 2096 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2097 ADJUST_ARGS(); 2098 } else if (nfserr == nfserr_denied) 2099 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2100 2101 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2102 } 2103 2104 static void 2105 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2106 { 2107 if (nfserr == nfserr_denied) 2108 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2109 } 2110 2111 static void 2112 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2113 { 2114 ENCODE_SEQID_OP_HEAD; 2115 2116 if (!nfserr) { 2117 RESERVE_SPACE(sizeof(stateid_t)); 2118 WRITE32(locku->lu_stateid.si_generation); 2119 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2120 ADJUST_ARGS(); 2121 } 2122 2123 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2124 } 2125 2126 2127 static void 2128 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2129 { 2130 ENCODE_HEAD; 2131 2132 if (!nfserr) { 2133 RESERVE_SPACE(20); 2134 WRITECINFO(link->li_cinfo); 2135 ADJUST_ARGS(); 2136 } 2137 } 2138 2139 2140 static void 2141 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2142 { 2143 ENCODE_SEQID_OP_HEAD; 2144 2145 if (nfserr) 2146 goto out; 2147 2148 RESERVE_SPACE(36 + sizeof(stateid_t)); 2149 WRITE32(open->op_stateid.si_generation); 2150 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2151 WRITECINFO(open->op_cinfo); 2152 WRITE32(open->op_rflags); 2153 WRITE32(2); 2154 WRITE32(open->op_bmval[0]); 2155 WRITE32(open->op_bmval[1]); 2156 WRITE32(open->op_delegate_type); 2157 ADJUST_ARGS(); 2158 2159 switch (open->op_delegate_type) { 2160 case NFS4_OPEN_DELEGATE_NONE: 2161 break; 2162 case NFS4_OPEN_DELEGATE_READ: 2163 RESERVE_SPACE(20 + sizeof(stateid_t)); 2164 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2165 WRITE32(open->op_recall); 2166 2167 /* 2168 * TODO: ACE's in delegations 2169 */ 2170 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2171 WRITE32(0); 2172 WRITE32(0); 2173 WRITE32(0); /* XXX: is NULL principal ok? */ 2174 ADJUST_ARGS(); 2175 break; 2176 case NFS4_OPEN_DELEGATE_WRITE: 2177 RESERVE_SPACE(32 + sizeof(stateid_t)); 2178 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2179 WRITE32(0); 2180 2181 /* 2182 * TODO: space_limit's in delegations 2183 */ 2184 WRITE32(NFS4_LIMIT_SIZE); 2185 WRITE32(~(u32)0); 2186 WRITE32(~(u32)0); 2187 2188 /* 2189 * TODO: ACE's in delegations 2190 */ 2191 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2192 WRITE32(0); 2193 WRITE32(0); 2194 WRITE32(0); /* XXX: is NULL principal ok? */ 2195 ADJUST_ARGS(); 2196 break; 2197 default: 2198 BUG(); 2199 } 2200 /* XXX save filehandle here */ 2201 out: 2202 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2203 } 2204 2205 static void 2206 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2207 { 2208 ENCODE_SEQID_OP_HEAD; 2209 2210 if (!nfserr) { 2211 RESERVE_SPACE(sizeof(stateid_t)); 2212 WRITE32(oc->oc_resp_stateid.si_generation); 2213 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2214 ADJUST_ARGS(); 2215 } 2216 2217 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2218 } 2219 2220 static void 2221 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2222 { 2223 ENCODE_SEQID_OP_HEAD; 2224 2225 if (!nfserr) { 2226 RESERVE_SPACE(sizeof(stateid_t)); 2227 WRITE32(od->od_stateid.si_generation); 2228 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2229 ADJUST_ARGS(); 2230 } 2231 2232 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2233 } 2234 2235 static __be32 2236 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2237 struct nfsd4_read *read) 2238 { 2239 u32 eof; 2240 int v, pn; 2241 unsigned long maxcount; 2242 long len; 2243 ENCODE_HEAD; 2244 2245 if (nfserr) 2246 return nfserr; 2247 if (resp->xbuf->page_len) 2248 return nfserr_resource; 2249 2250 RESERVE_SPACE(8); /* eof flag and byte count */ 2251 2252 maxcount = svc_max_payload(resp->rqstp); 2253 if (maxcount > read->rd_length) 2254 maxcount = read->rd_length; 2255 2256 len = maxcount; 2257 v = 0; 2258 while (len > 0) { 2259 pn = resp->rqstp->rq_resused++; 2260 resp->rqstp->rq_vec[v].iov_base = 2261 page_address(resp->rqstp->rq_respages[pn]); 2262 resp->rqstp->rq_vec[v].iov_len = 2263 len < PAGE_SIZE ? len : PAGE_SIZE; 2264 v++; 2265 len -= PAGE_SIZE; 2266 } 2267 read->rd_vlen = v; 2268 2269 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2270 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2271 &maxcount); 2272 2273 if (nfserr == nfserr_symlink) 2274 nfserr = nfserr_inval; 2275 if (nfserr) 2276 return nfserr; 2277 eof = (read->rd_offset + maxcount >= 2278 read->rd_fhp->fh_dentry->d_inode->i_size); 2279 2280 WRITE32(eof); 2281 WRITE32(maxcount); 2282 ADJUST_ARGS(); 2283 resp->xbuf->head[0].iov_len = (char*)p 2284 - (char*)resp->xbuf->head[0].iov_base; 2285 resp->xbuf->page_len = maxcount; 2286 2287 /* Use rest of head for padding and remaining ops: */ 2288 resp->xbuf->tail[0].iov_base = p; 2289 resp->xbuf->tail[0].iov_len = 0; 2290 if (maxcount&3) { 2291 RESERVE_SPACE(4); 2292 WRITE32(0); 2293 resp->xbuf->tail[0].iov_base += maxcount&3; 2294 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2295 ADJUST_ARGS(); 2296 } 2297 return 0; 2298 } 2299 2300 static __be32 2301 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2302 { 2303 int maxcount; 2304 char *page; 2305 ENCODE_HEAD; 2306 2307 if (nfserr) 2308 return nfserr; 2309 if (resp->xbuf->page_len) 2310 return nfserr_resource; 2311 2312 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2313 2314 maxcount = PAGE_SIZE; 2315 RESERVE_SPACE(4); 2316 2317 /* 2318 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2319 * if they would overflow the buffer. Is this kosher in NFSv4? If 2320 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2321 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2322 */ 2323 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2324 if (nfserr == nfserr_isdir) 2325 return nfserr_inval; 2326 if (nfserr) 2327 return nfserr; 2328 2329 WRITE32(maxcount); 2330 ADJUST_ARGS(); 2331 resp->xbuf->head[0].iov_len = (char*)p 2332 - (char*)resp->xbuf->head[0].iov_base; 2333 resp->xbuf->page_len = maxcount; 2334 2335 /* Use rest of head for padding and remaining ops: */ 2336 resp->xbuf->tail[0].iov_base = p; 2337 resp->xbuf->tail[0].iov_len = 0; 2338 if (maxcount&3) { 2339 RESERVE_SPACE(4); 2340 WRITE32(0); 2341 resp->xbuf->tail[0].iov_base += maxcount&3; 2342 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2343 ADJUST_ARGS(); 2344 } 2345 return 0; 2346 } 2347 2348 static __be32 2349 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2350 { 2351 int maxcount; 2352 loff_t offset; 2353 __be32 *page, *savep, *tailbase; 2354 ENCODE_HEAD; 2355 2356 if (nfserr) 2357 return nfserr; 2358 if (resp->xbuf->page_len) 2359 return nfserr_resource; 2360 2361 RESERVE_SPACE(8); /* verifier */ 2362 savep = p; 2363 2364 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2365 WRITE32(0); 2366 WRITE32(0); 2367 ADJUST_ARGS(); 2368 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2369 tailbase = p; 2370 2371 maxcount = PAGE_SIZE; 2372 if (maxcount > readdir->rd_maxcount) 2373 maxcount = readdir->rd_maxcount; 2374 2375 /* 2376 * Convert from bytes to words, account for the two words already 2377 * written, make sure to leave two words at the end for the next 2378 * pointer and eof field. 2379 */ 2380 maxcount = (maxcount >> 2) - 4; 2381 if (maxcount < 0) { 2382 nfserr = nfserr_toosmall; 2383 goto err_no_verf; 2384 } 2385 2386 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2387 readdir->common.err = 0; 2388 readdir->buflen = maxcount; 2389 readdir->buffer = page; 2390 readdir->offset = NULL; 2391 2392 offset = readdir->rd_cookie; 2393 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2394 &offset, 2395 &readdir->common, nfsd4_encode_dirent); 2396 if (nfserr == nfs_ok && 2397 readdir->common.err == nfserr_toosmall && 2398 readdir->buffer == page) 2399 nfserr = nfserr_toosmall; 2400 if (nfserr == nfserr_symlink) 2401 nfserr = nfserr_notdir; 2402 if (nfserr) 2403 goto err_no_verf; 2404 2405 if (readdir->offset) 2406 xdr_encode_hyper(readdir->offset, offset); 2407 2408 p = readdir->buffer; 2409 *p++ = 0; /* no more entries */ 2410 *p++ = htonl(readdir->common.err == nfserr_eof); 2411 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2412 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2413 2414 /* Use rest of head for padding and remaining ops: */ 2415 resp->xbuf->tail[0].iov_base = tailbase; 2416 resp->xbuf->tail[0].iov_len = 0; 2417 resp->p = resp->xbuf->tail[0].iov_base; 2418 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2419 2420 return 0; 2421 err_no_verf: 2422 p = savep; 2423 ADJUST_ARGS(); 2424 return nfserr; 2425 } 2426 2427 static void 2428 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2429 { 2430 ENCODE_HEAD; 2431 2432 if (!nfserr) { 2433 RESERVE_SPACE(20); 2434 WRITECINFO(remove->rm_cinfo); 2435 ADJUST_ARGS(); 2436 } 2437 } 2438 2439 static void 2440 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2441 { 2442 ENCODE_HEAD; 2443 2444 if (!nfserr) { 2445 RESERVE_SPACE(40); 2446 WRITECINFO(rename->rn_sinfo); 2447 WRITECINFO(rename->rn_tinfo); 2448 ADJUST_ARGS(); 2449 } 2450 } 2451 2452 static void 2453 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2454 struct nfsd4_secinfo *secinfo) 2455 { 2456 int i = 0; 2457 struct svc_export *exp = secinfo->si_exp; 2458 u32 nflavs; 2459 struct exp_flavor_info *flavs; 2460 struct exp_flavor_info def_flavs[2]; 2461 ENCODE_HEAD; 2462 2463 if (nfserr) 2464 goto out; 2465 if (exp->ex_nflavors) { 2466 flavs = exp->ex_flavors; 2467 nflavs = exp->ex_nflavors; 2468 } else { /* Handling of some defaults in absence of real secinfo: */ 2469 flavs = def_flavs; 2470 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2471 nflavs = 2; 2472 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2473 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2474 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2475 nflavs = 1; 2476 flavs[0].pseudoflavor 2477 = svcauth_gss_flavor(exp->ex_client); 2478 } else { 2479 nflavs = 1; 2480 flavs[0].pseudoflavor 2481 = exp->ex_client->flavour->flavour; 2482 } 2483 } 2484 2485 RESERVE_SPACE(4); 2486 WRITE32(nflavs); 2487 ADJUST_ARGS(); 2488 for (i = 0; i < nflavs; i++) { 2489 u32 flav = flavs[i].pseudoflavor; 2490 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2491 2492 if (gm) { 2493 RESERVE_SPACE(4); 2494 WRITE32(RPC_AUTH_GSS); 2495 ADJUST_ARGS(); 2496 RESERVE_SPACE(4 + gm->gm_oid.len); 2497 WRITE32(gm->gm_oid.len); 2498 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2499 ADJUST_ARGS(); 2500 RESERVE_SPACE(4); 2501 WRITE32(0); /* qop */ 2502 ADJUST_ARGS(); 2503 RESERVE_SPACE(4); 2504 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2505 ADJUST_ARGS(); 2506 gss_mech_put(gm); 2507 } else { 2508 RESERVE_SPACE(4); 2509 WRITE32(flav); 2510 ADJUST_ARGS(); 2511 } 2512 } 2513 out: 2514 if (exp) 2515 exp_put(exp); 2516 } 2517 2518 /* 2519 * The SETATTR encode routine is special -- it always encodes a bitmap, 2520 * regardless of the error status. 2521 */ 2522 static void 2523 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2524 { 2525 ENCODE_HEAD; 2526 2527 RESERVE_SPACE(12); 2528 if (nfserr) { 2529 WRITE32(2); 2530 WRITE32(0); 2531 WRITE32(0); 2532 } 2533 else { 2534 WRITE32(2); 2535 WRITE32(setattr->sa_bmval[0]); 2536 WRITE32(setattr->sa_bmval[1]); 2537 } 2538 ADJUST_ARGS(); 2539 } 2540 2541 static void 2542 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2543 { 2544 ENCODE_HEAD; 2545 2546 if (!nfserr) { 2547 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2548 WRITEMEM(&scd->se_clientid, 8); 2549 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2550 ADJUST_ARGS(); 2551 } 2552 else if (nfserr == nfserr_clid_inuse) { 2553 RESERVE_SPACE(8); 2554 WRITE32(0); 2555 WRITE32(0); 2556 ADJUST_ARGS(); 2557 } 2558 } 2559 2560 static void 2561 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2562 { 2563 ENCODE_HEAD; 2564 2565 if (!nfserr) { 2566 RESERVE_SPACE(16); 2567 WRITE32(write->wr_bytes_written); 2568 WRITE32(write->wr_how_written); 2569 WRITEMEM(write->wr_verifier.data, 8); 2570 ADJUST_ARGS(); 2571 } 2572 } 2573 2574 void 2575 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2576 { 2577 __be32 *statp; 2578 ENCODE_HEAD; 2579 2580 RESERVE_SPACE(8); 2581 WRITE32(op->opnum); 2582 statp = p++; /* to be backfilled at the end */ 2583 ADJUST_ARGS(); 2584 2585 switch (op->opnum) { 2586 case OP_ACCESS: 2587 nfsd4_encode_access(resp, op->status, &op->u.access); 2588 break; 2589 case OP_CLOSE: 2590 nfsd4_encode_close(resp, op->status, &op->u.close); 2591 break; 2592 case OP_COMMIT: 2593 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2594 break; 2595 case OP_CREATE: 2596 nfsd4_encode_create(resp, op->status, &op->u.create); 2597 break; 2598 case OP_DELEGRETURN: 2599 break; 2600 case OP_GETATTR: 2601 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2602 break; 2603 case OP_GETFH: 2604 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2605 break; 2606 case OP_LINK: 2607 nfsd4_encode_link(resp, op->status, &op->u.link); 2608 break; 2609 case OP_LOCK: 2610 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2611 break; 2612 case OP_LOCKT: 2613 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2614 break; 2615 case OP_LOCKU: 2616 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2617 break; 2618 case OP_LOOKUP: 2619 break; 2620 case OP_LOOKUPP: 2621 break; 2622 case OP_NVERIFY: 2623 break; 2624 case OP_OPEN: 2625 nfsd4_encode_open(resp, op->status, &op->u.open); 2626 break; 2627 case OP_OPEN_CONFIRM: 2628 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2629 break; 2630 case OP_OPEN_DOWNGRADE: 2631 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2632 break; 2633 case OP_PUTFH: 2634 break; 2635 case OP_PUTROOTFH: 2636 break; 2637 case OP_READ: 2638 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2639 break; 2640 case OP_READDIR: 2641 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2642 break; 2643 case OP_READLINK: 2644 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2645 break; 2646 case OP_REMOVE: 2647 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2648 break; 2649 case OP_RENAME: 2650 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2651 break; 2652 case OP_RENEW: 2653 break; 2654 case OP_RESTOREFH: 2655 break; 2656 case OP_SAVEFH: 2657 break; 2658 case OP_SECINFO: 2659 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo); 2660 break; 2661 case OP_SETATTR: 2662 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2663 break; 2664 case OP_SETCLIENTID: 2665 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2666 break; 2667 case OP_SETCLIENTID_CONFIRM: 2668 break; 2669 case OP_VERIFY: 2670 break; 2671 case OP_WRITE: 2672 nfsd4_encode_write(resp, op->status, &op->u.write); 2673 break; 2674 case OP_RELEASE_LOCKOWNER: 2675 break; 2676 default: 2677 break; 2678 } 2679 2680 /* 2681 * Note: We write the status directly, instead of using WRITE32(), 2682 * since it is already in network byte order. 2683 */ 2684 *statp = op->status; 2685 } 2686 2687 /* 2688 * Encode the reply stored in the stateowner reply cache 2689 * 2690 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2691 * previously sent already encoded operation. 2692 * 2693 * called with nfs4_lock_state() held 2694 */ 2695 void 2696 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2697 { 2698 ENCODE_HEAD; 2699 struct nfs4_replay *rp = op->replay; 2700 2701 BUG_ON(!rp); 2702 2703 RESERVE_SPACE(8); 2704 WRITE32(op->opnum); 2705 *p++ = rp->rp_status; /* already xdr'ed */ 2706 ADJUST_ARGS(); 2707 2708 RESERVE_SPACE(rp->rp_buflen); 2709 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2710 ADJUST_ARGS(); 2711 } 2712 2713 /* 2714 * END OF "GENERIC" ENCODE ROUTINES. 2715 */ 2716 2717 int 2718 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2719 { 2720 return xdr_ressize_check(rqstp, p); 2721 } 2722 2723 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2724 { 2725 if (args->ops != args->iops) { 2726 kfree(args->ops); 2727 args->ops = args->iops; 2728 } 2729 kfree(args->tmpp); 2730 args->tmpp = NULL; 2731 while (args->to_free) { 2732 struct tmpbuf *tb = args->to_free; 2733 args->to_free = tb->next; 2734 tb->release(tb->buf); 2735 kfree(tb); 2736 } 2737 } 2738 2739 int 2740 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2741 { 2742 __be32 status; 2743 2744 args->p = p; 2745 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2746 args->pagelist = rqstp->rq_arg.pages; 2747 args->pagelen = rqstp->rq_arg.page_len; 2748 args->tmpp = NULL; 2749 args->to_free = NULL; 2750 args->ops = args->iops; 2751 args->rqstp = rqstp; 2752 2753 status = nfsd4_decode_compound(args); 2754 if (status) { 2755 nfsd4_release_compoundargs(args); 2756 } 2757 return !status; 2758 } 2759 2760 int 2761 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2762 { 2763 /* 2764 * All that remains is to write the tag and operation count... 2765 */ 2766 struct kvec *iov; 2767 p = resp->tagp; 2768 *p++ = htonl(resp->taglen); 2769 memcpy(p, resp->tag, resp->taglen); 2770 p += XDR_QUADLEN(resp->taglen); 2771 *p++ = htonl(resp->opcnt); 2772 2773 if (rqstp->rq_res.page_len) 2774 iov = &rqstp->rq_res.tail[0]; 2775 else 2776 iov = &rqstp->rq_res.head[0]; 2777 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2778 BUG_ON(iov->iov_len > PAGE_SIZE); 2779 return 1; 2780 } 2781 2782 /* 2783 * Local variables: 2784 * c-basic-offset: 8 2785 * End: 2786 */ 2787