1 /* 2 * fs/nfs/nfs4xdr.c 3 * 4 * Server-side XDR for NFSv4 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * TODO: Neil Brown made the following observation: We currently 38 * initially reserve NFSD_BUFSIZE space on the transmit queue and 39 * never release any of that until the request is complete. 40 * It would be good to calculate a new maximum response size while 41 * decoding the COMPOUND, and call svc_reserve with this number 42 * at the end of nfs4svc_decode_compoundargs. 43 */ 44 45 #include <linux/param.h> 46 #include <linux/smp.h> 47 #include <linux/fs.h> 48 #include <linux/namei.h> 49 #include <linux/vfs.h> 50 #include <linux/sunrpc/xdr.h> 51 #include <linux/sunrpc/svc.h> 52 #include <linux/sunrpc/clnt.h> 53 #include <linux/nfsd/nfsd.h> 54 #include <linux/nfsd/state.h> 55 #include <linux/nfsd/xdr4.h> 56 #include <linux/nfsd_idmap.h> 57 #include <linux/nfs4.h> 58 #include <linux/nfs4_acl.h> 59 #include <linux/sunrpc/gss_api.h> 60 #include <linux/sunrpc/svcauth_gss.h> 61 62 #define NFSDDBG_FACILITY NFSDDBG_XDR 63 64 /* 65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 66 * directory in order to indicate to the client that a filesystem boundary is present 67 * We use a fixed fsid for a referral 68 */ 69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 71 72 static __be32 73 check_filename(char *str, int len, __be32 err) 74 { 75 int i; 76 77 if (len == 0) 78 return nfserr_inval; 79 if (isdotent(str, len)) 80 return err; 81 for (i = 0; i < len; i++) 82 if (str[i] == '/') 83 return err; 84 return 0; 85 } 86 87 /* 88 * START OF "GENERIC" DECODE ROUTINES. 89 * These may look a little ugly since they are imported from a "generic" 90 * set of XDR encode/decode routines which are intended to be shared by 91 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 92 * 93 * If the pain of reading these is too great, it should be a straightforward 94 * task to translate them into Linux-specific versions which are more 95 * consistent with the style used in NFSv2/v3... 96 */ 97 #define DECODE_HEAD \ 98 __be32 *p; \ 99 __be32 status 100 #define DECODE_TAIL \ 101 status = 0; \ 102 out: \ 103 return status; \ 104 xdr_error: \ 105 dprintk("NFSD: xdr error (%s:%d)\n", \ 106 __FILE__, __LINE__); \ 107 status = nfserr_bad_xdr; \ 108 goto out 109 110 #define READ32(x) (x) = ntohl(*p++) 111 #define READ64(x) do { \ 112 (x) = (u64)ntohl(*p++) << 32; \ 113 (x) |= ntohl(*p++); \ 114 } while (0) 115 #define READTIME(x) do { \ 116 p++; \ 117 (x) = ntohl(*p++); \ 118 p++; \ 119 } while (0) 120 #define READMEM(x,nbytes) do { \ 121 x = (char *)p; \ 122 p += XDR_QUADLEN(nbytes); \ 123 } while (0) 124 #define SAVEMEM(x,nbytes) do { \ 125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 126 savemem(argp, p, nbytes) : \ 127 (char *)p)) { \ 128 dprintk("NFSD: xdr error (%s:%d)\n", \ 129 __FILE__, __LINE__); \ 130 goto xdr_error; \ 131 } \ 132 p += XDR_QUADLEN(nbytes); \ 133 } while (0) 134 #define COPYMEM(x,nbytes) do { \ 135 memcpy((x), p, nbytes); \ 136 p += XDR_QUADLEN(nbytes); \ 137 } while (0) 138 139 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 140 #define READ_BUF(nbytes) do { \ 141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 142 p = argp->p; \ 143 argp->p += XDR_QUADLEN(nbytes); \ 144 } else if (!(p = read_buf(argp, nbytes))) { \ 145 dprintk("NFSD: xdr error (%s:%d)\n", \ 146 __FILE__, __LINE__); \ 147 goto xdr_error; \ 148 } \ 149 } while (0) 150 151 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 152 { 153 /* We want more bytes than seem to be available. 154 * Maybe we need a new page, maybe we have just run out 155 */ 156 unsigned int avail = (char *)argp->end - (char *)argp->p; 157 __be32 *p; 158 if (avail + argp->pagelen < nbytes) 159 return NULL; 160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 161 return NULL; 162 /* ok, we can do it with the current plus the next page */ 163 if (nbytes <= sizeof(argp->tmp)) 164 p = argp->tmp; 165 else { 166 kfree(argp->tmpp); 167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 168 if (!p) 169 return NULL; 170 171 } 172 /* 173 * The following memcpy is safe because read_buf is always 174 * called with nbytes > avail, and the two cases above both 175 * guarantee p points to at least nbytes bytes. 176 */ 177 memcpy(p, argp->p, avail); 178 /* step to next page */ 179 argp->p = page_address(argp->pagelist[0]); 180 argp->pagelist++; 181 if (argp->pagelen < PAGE_SIZE) { 182 argp->end = p + (argp->pagelen>>2); 183 argp->pagelen = 0; 184 } else { 185 argp->end = p + (PAGE_SIZE>>2); 186 argp->pagelen -= PAGE_SIZE; 187 } 188 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 189 argp->p += XDR_QUADLEN(nbytes - avail); 190 return p; 191 } 192 193 static int 194 defer_free(struct nfsd4_compoundargs *argp, 195 void (*release)(const void *), void *p) 196 { 197 struct tmpbuf *tb; 198 199 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 200 if (!tb) 201 return -ENOMEM; 202 tb->buf = p; 203 tb->release = release; 204 tb->next = argp->to_free; 205 argp->to_free = tb; 206 return 0; 207 } 208 209 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 210 { 211 if (p == argp->tmp) { 212 p = kmalloc(nbytes, GFP_KERNEL); 213 if (!p) 214 return NULL; 215 memcpy(p, argp->tmp, nbytes); 216 } else { 217 BUG_ON(p != argp->tmpp); 218 argp->tmpp = NULL; 219 } 220 if (defer_free(argp, kfree, p)) { 221 kfree(p); 222 return NULL; 223 } else 224 return (char *)p; 225 } 226 227 static __be32 228 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 229 { 230 u32 bmlen; 231 DECODE_HEAD; 232 233 bmval[0] = 0; 234 bmval[1] = 0; 235 236 READ_BUF(4); 237 READ32(bmlen); 238 if (bmlen > 1000) 239 goto xdr_error; 240 241 READ_BUF(bmlen << 2); 242 if (bmlen > 0) 243 READ32(bmval[0]); 244 if (bmlen > 1) 245 READ32(bmval[1]); 246 247 DECODE_TAIL; 248 } 249 250 static __be32 251 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, 252 struct nfs4_acl **acl) 253 { 254 int expected_len, len = 0; 255 u32 dummy32; 256 char *buf; 257 int host_err; 258 259 DECODE_HEAD; 260 iattr->ia_valid = 0; 261 if ((status = nfsd4_decode_bitmap(argp, bmval))) 262 return status; 263 264 /* 265 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP; 266 * read-only attributes return ERR_INVAL. 267 */ 268 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) 269 return nfserr_attrnotsupp; 270 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) 271 return nfserr_inval; 272 273 READ_BUF(4); 274 READ32(expected_len); 275 276 if (bmval[0] & FATTR4_WORD0_SIZE) { 277 READ_BUF(8); 278 len += 8; 279 READ64(iattr->ia_size); 280 iattr->ia_valid |= ATTR_SIZE; 281 } 282 if (bmval[0] & FATTR4_WORD0_ACL) { 283 int nace; 284 struct nfs4_ace *ace; 285 286 READ_BUF(4); len += 4; 287 READ32(nace); 288 289 if (nace > NFS4_ACL_MAX) 290 return nfserr_resource; 291 292 *acl = nfs4_acl_new(nace); 293 if (*acl == NULL) { 294 host_err = -ENOMEM; 295 goto out_nfserr; 296 } 297 defer_free(argp, kfree, *acl); 298 299 (*acl)->naces = nace; 300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 301 READ_BUF(16); len += 16; 302 READ32(ace->type); 303 READ32(ace->flag); 304 READ32(ace->access_mask); 305 READ32(dummy32); 306 READ_BUF(dummy32); 307 len += XDR_QUADLEN(dummy32) << 2; 308 READMEM(buf, dummy32); 309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 310 host_err = 0; 311 if (ace->whotype != NFS4_ACL_WHO_NAMED) 312 ace->who = 0; 313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 314 host_err = nfsd_map_name_to_gid(argp->rqstp, 315 buf, dummy32, &ace->who); 316 else 317 host_err = nfsd_map_name_to_uid(argp->rqstp, 318 buf, dummy32, &ace->who); 319 if (host_err) 320 goto out_nfserr; 321 } 322 } else 323 *acl = NULL; 324 if (bmval[1] & FATTR4_WORD1_MODE) { 325 READ_BUF(4); 326 len += 4; 327 READ32(iattr->ia_mode); 328 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 329 iattr->ia_valid |= ATTR_MODE; 330 } 331 if (bmval[1] & FATTR4_WORD1_OWNER) { 332 READ_BUF(4); 333 len += 4; 334 READ32(dummy32); 335 READ_BUF(dummy32); 336 len += (XDR_QUADLEN(dummy32) << 2); 337 READMEM(buf, dummy32); 338 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 339 goto out_nfserr; 340 iattr->ia_valid |= ATTR_UID; 341 } 342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 343 READ_BUF(4); 344 len += 4; 345 READ32(dummy32); 346 READ_BUF(dummy32); 347 len += (XDR_QUADLEN(dummy32) << 2); 348 READMEM(buf, dummy32); 349 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 350 goto out_nfserr; 351 iattr->ia_valid |= ATTR_GID; 352 } 353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 354 READ_BUF(4); 355 len += 4; 356 READ32(dummy32); 357 switch (dummy32) { 358 case NFS4_SET_TO_CLIENT_TIME: 359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 360 all 32 bits of 'nseconds'. */ 361 READ_BUF(12); 362 len += 12; 363 READ32(dummy32); 364 if (dummy32) 365 return nfserr_inval; 366 READ32(iattr->ia_atime.tv_sec); 367 READ32(iattr->ia_atime.tv_nsec); 368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 369 return nfserr_inval; 370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 371 break; 372 case NFS4_SET_TO_SERVER_TIME: 373 iattr->ia_valid |= ATTR_ATIME; 374 break; 375 default: 376 goto xdr_error; 377 } 378 } 379 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { 380 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 381 all 32 bits of 'nseconds'. */ 382 READ_BUF(12); 383 len += 12; 384 READ32(dummy32); 385 if (dummy32) 386 return nfserr_inval; 387 READ32(iattr->ia_ctime.tv_sec); 388 READ32(iattr->ia_ctime.tv_nsec); 389 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) 390 return nfserr_inval; 391 iattr->ia_valid |= ATTR_CTIME; 392 } 393 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 394 READ_BUF(4); 395 len += 4; 396 READ32(dummy32); 397 switch (dummy32) { 398 case NFS4_SET_TO_CLIENT_TIME: 399 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 400 all 32 bits of 'nseconds'. */ 401 READ_BUF(12); 402 len += 12; 403 READ32(dummy32); 404 if (dummy32) 405 return nfserr_inval; 406 READ32(iattr->ia_mtime.tv_sec); 407 READ32(iattr->ia_mtime.tv_nsec); 408 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 409 return nfserr_inval; 410 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 411 break; 412 case NFS4_SET_TO_SERVER_TIME: 413 iattr->ia_valid |= ATTR_MTIME; 414 break; 415 default: 416 goto xdr_error; 417 } 418 } 419 if (len != expected_len) 420 goto xdr_error; 421 422 DECODE_TAIL; 423 424 out_nfserr: 425 status = nfserrno(host_err); 426 goto out; 427 } 428 429 static __be32 430 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 431 { 432 DECODE_HEAD; 433 434 READ_BUF(4); 435 READ32(access->ac_req_access); 436 437 DECODE_TAIL; 438 } 439 440 static __be32 441 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 442 { 443 DECODE_HEAD; 444 445 close->cl_stateowner = NULL; 446 READ_BUF(4 + sizeof(stateid_t)); 447 READ32(close->cl_seqid); 448 READ32(close->cl_stateid.si_generation); 449 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 450 451 DECODE_TAIL; 452 } 453 454 455 static __be32 456 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 457 { 458 DECODE_HEAD; 459 460 READ_BUF(12); 461 READ64(commit->co_offset); 462 READ32(commit->co_count); 463 464 DECODE_TAIL; 465 } 466 467 static __be32 468 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 469 { 470 DECODE_HEAD; 471 472 READ_BUF(4); 473 READ32(create->cr_type); 474 switch (create->cr_type) { 475 case NF4LNK: 476 READ_BUF(4); 477 READ32(create->cr_linklen); 478 READ_BUF(create->cr_linklen); 479 SAVEMEM(create->cr_linkname, create->cr_linklen); 480 break; 481 case NF4BLK: 482 case NF4CHR: 483 READ_BUF(8); 484 READ32(create->cr_specdata1); 485 READ32(create->cr_specdata2); 486 break; 487 case NF4SOCK: 488 case NF4FIFO: 489 case NF4DIR: 490 default: 491 break; 492 } 493 494 READ_BUF(4); 495 READ32(create->cr_namelen); 496 READ_BUF(create->cr_namelen); 497 SAVEMEM(create->cr_name, create->cr_namelen); 498 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 499 return status; 500 501 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) 502 goto out; 503 504 DECODE_TAIL; 505 } 506 507 static inline __be32 508 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 509 { 510 DECODE_HEAD; 511 512 READ_BUF(sizeof(stateid_t)); 513 READ32(dr->dr_stateid.si_generation); 514 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); 515 516 DECODE_TAIL; 517 } 518 519 static inline __be32 520 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 521 { 522 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 523 } 524 525 static __be32 526 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 527 { 528 DECODE_HEAD; 529 530 READ_BUF(4); 531 READ32(link->li_namelen); 532 READ_BUF(link->li_namelen); 533 SAVEMEM(link->li_name, link->li_namelen); 534 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 535 return status; 536 537 DECODE_TAIL; 538 } 539 540 static __be32 541 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 542 { 543 DECODE_HEAD; 544 545 lock->lk_replay_owner = NULL; 546 /* 547 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 548 */ 549 READ_BUF(28); 550 READ32(lock->lk_type); 551 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 552 goto xdr_error; 553 READ32(lock->lk_reclaim); 554 READ64(lock->lk_offset); 555 READ64(lock->lk_length); 556 READ32(lock->lk_is_new); 557 558 if (lock->lk_is_new) { 559 READ_BUF(36); 560 READ32(lock->lk_new_open_seqid); 561 READ32(lock->lk_new_open_stateid.si_generation); 562 563 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); 564 READ32(lock->lk_new_lock_seqid); 565 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 566 READ32(lock->lk_new_owner.len); 567 READ_BUF(lock->lk_new_owner.len); 568 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 569 } else { 570 READ_BUF(20); 571 READ32(lock->lk_old_lock_stateid.si_generation); 572 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); 573 READ32(lock->lk_old_lock_seqid); 574 } 575 576 DECODE_TAIL; 577 } 578 579 static __be32 580 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 581 { 582 DECODE_HEAD; 583 584 READ_BUF(32); 585 READ32(lockt->lt_type); 586 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 587 goto xdr_error; 588 READ64(lockt->lt_offset); 589 READ64(lockt->lt_length); 590 COPYMEM(&lockt->lt_clientid, 8); 591 READ32(lockt->lt_owner.len); 592 READ_BUF(lockt->lt_owner.len); 593 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 594 595 DECODE_TAIL; 596 } 597 598 static __be32 599 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 600 { 601 DECODE_HEAD; 602 603 locku->lu_stateowner = NULL; 604 READ_BUF(24 + sizeof(stateid_t)); 605 READ32(locku->lu_type); 606 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 607 goto xdr_error; 608 READ32(locku->lu_seqid); 609 READ32(locku->lu_stateid.si_generation); 610 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 611 READ64(locku->lu_offset); 612 READ64(locku->lu_length); 613 614 DECODE_TAIL; 615 } 616 617 static __be32 618 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 619 { 620 DECODE_HEAD; 621 622 READ_BUF(4); 623 READ32(lookup->lo_len); 624 READ_BUF(lookup->lo_len); 625 SAVEMEM(lookup->lo_name, lookup->lo_len); 626 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 627 return status; 628 629 DECODE_TAIL; 630 } 631 632 static __be32 633 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 634 { 635 DECODE_HEAD; 636 637 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 638 open->op_iattr.ia_valid = 0; 639 open->op_stateowner = NULL; 640 641 /* seqid, share_access, share_deny, clientid, ownerlen */ 642 READ_BUF(16 + sizeof(clientid_t)); 643 READ32(open->op_seqid); 644 READ32(open->op_share_access); 645 READ32(open->op_share_deny); 646 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 647 READ32(open->op_owner.len); 648 649 /* owner, open_flag */ 650 READ_BUF(open->op_owner.len + 4); 651 SAVEMEM(open->op_owner.data, open->op_owner.len); 652 READ32(open->op_create); 653 switch (open->op_create) { 654 case NFS4_OPEN_NOCREATE: 655 break; 656 case NFS4_OPEN_CREATE: 657 READ_BUF(4); 658 READ32(open->op_createmode); 659 switch (open->op_createmode) { 660 case NFS4_CREATE_UNCHECKED: 661 case NFS4_CREATE_GUARDED: 662 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) 663 goto out; 664 break; 665 case NFS4_CREATE_EXCLUSIVE: 666 READ_BUF(8); 667 COPYMEM(open->op_verf.data, 8); 668 break; 669 default: 670 goto xdr_error; 671 } 672 break; 673 default: 674 goto xdr_error; 675 } 676 677 /* open_claim */ 678 READ_BUF(4); 679 READ32(open->op_claim_type); 680 switch (open->op_claim_type) { 681 case NFS4_OPEN_CLAIM_NULL: 682 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 683 READ_BUF(4); 684 READ32(open->op_fname.len); 685 READ_BUF(open->op_fname.len); 686 SAVEMEM(open->op_fname.data, open->op_fname.len); 687 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 688 return status; 689 break; 690 case NFS4_OPEN_CLAIM_PREVIOUS: 691 READ_BUF(4); 692 READ32(open->op_delegate_type); 693 break; 694 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 695 READ_BUF(sizeof(stateid_t) + 4); 696 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 697 READ32(open->op_fname.len); 698 READ_BUF(open->op_fname.len); 699 SAVEMEM(open->op_fname.data, open->op_fname.len); 700 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 701 return status; 702 break; 703 default: 704 goto xdr_error; 705 } 706 707 DECODE_TAIL; 708 } 709 710 static __be32 711 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 712 { 713 DECODE_HEAD; 714 715 open_conf->oc_stateowner = NULL; 716 READ_BUF(4 + sizeof(stateid_t)); 717 READ32(open_conf->oc_req_stateid.si_generation); 718 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); 719 READ32(open_conf->oc_seqid); 720 721 DECODE_TAIL; 722 } 723 724 static __be32 725 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 726 { 727 DECODE_HEAD; 728 729 open_down->od_stateowner = NULL; 730 READ_BUF(12 + sizeof(stateid_t)); 731 READ32(open_down->od_stateid.si_generation); 732 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 733 READ32(open_down->od_seqid); 734 READ32(open_down->od_share_access); 735 READ32(open_down->od_share_deny); 736 737 DECODE_TAIL; 738 } 739 740 static __be32 741 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 742 { 743 DECODE_HEAD; 744 745 READ_BUF(4); 746 READ32(putfh->pf_fhlen); 747 if (putfh->pf_fhlen > NFS4_FHSIZE) 748 goto xdr_error; 749 READ_BUF(putfh->pf_fhlen); 750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 751 752 DECODE_TAIL; 753 } 754 755 static __be32 756 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 757 { 758 DECODE_HEAD; 759 760 READ_BUF(sizeof(stateid_t) + 12); 761 READ32(read->rd_stateid.si_generation); 762 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); 763 READ64(read->rd_offset); 764 READ32(read->rd_length); 765 766 DECODE_TAIL; 767 } 768 769 static __be32 770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 771 { 772 DECODE_HEAD; 773 774 READ_BUF(24); 775 READ64(readdir->rd_cookie); 776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 778 READ32(readdir->rd_maxcount); 779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 780 goto out; 781 782 DECODE_TAIL; 783 } 784 785 static __be32 786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 787 { 788 DECODE_HEAD; 789 790 READ_BUF(4); 791 READ32(remove->rm_namelen); 792 READ_BUF(remove->rm_namelen); 793 SAVEMEM(remove->rm_name, remove->rm_namelen); 794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 795 return status; 796 797 DECODE_TAIL; 798 } 799 800 static __be32 801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 802 { 803 DECODE_HEAD; 804 805 READ_BUF(4); 806 READ32(rename->rn_snamelen); 807 READ_BUF(rename->rn_snamelen + 4); 808 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 809 READ32(rename->rn_tnamelen); 810 READ_BUF(rename->rn_tnamelen); 811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 813 return status; 814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 815 return status; 816 817 DECODE_TAIL; 818 } 819 820 static __be32 821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 822 { 823 DECODE_HEAD; 824 825 READ_BUF(sizeof(clientid_t)); 826 COPYMEM(clientid, sizeof(clientid_t)); 827 828 DECODE_TAIL; 829 } 830 831 static __be32 832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 833 struct nfsd4_secinfo *secinfo) 834 { 835 DECODE_HEAD; 836 837 READ_BUF(4); 838 READ32(secinfo->si_namelen); 839 READ_BUF(secinfo->si_namelen); 840 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 841 status = check_filename(secinfo->si_name, secinfo->si_namelen, 842 nfserr_noent); 843 if (status) 844 return status; 845 DECODE_TAIL; 846 } 847 848 static __be32 849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 850 { 851 DECODE_HEAD; 852 853 READ_BUF(sizeof(stateid_t)); 854 READ32(setattr->sa_stateid.si_generation); 855 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); 856 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) 857 goto out; 858 859 DECODE_TAIL; 860 } 861 862 static __be32 863 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 864 { 865 DECODE_HEAD; 866 867 READ_BUF(12); 868 COPYMEM(setclientid->se_verf.data, 8); 869 READ32(setclientid->se_namelen); 870 871 READ_BUF(setclientid->se_namelen + 8); 872 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 873 READ32(setclientid->se_callback_prog); 874 READ32(setclientid->se_callback_netid_len); 875 876 READ_BUF(setclientid->se_callback_netid_len + 4); 877 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 878 READ32(setclientid->se_callback_addr_len); 879 880 READ_BUF(setclientid->se_callback_addr_len + 4); 881 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 882 READ32(setclientid->se_callback_ident); 883 884 DECODE_TAIL; 885 } 886 887 static __be32 888 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 889 { 890 DECODE_HEAD; 891 892 READ_BUF(8 + sizeof(nfs4_verifier)); 893 COPYMEM(&scd_c->sc_clientid, 8); 894 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 895 896 DECODE_TAIL; 897 } 898 899 /* Also used for NVERIFY */ 900 static __be32 901 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 902 { 903 #if 0 904 struct nfsd4_compoundargs save = { 905 .p = argp->p, 906 .end = argp->end, 907 .rqstp = argp->rqstp, 908 }; 909 u32 ve_bmval[2]; 910 struct iattr ve_iattr; /* request */ 911 struct nfs4_acl *ve_acl; /* request */ 912 #endif 913 DECODE_HEAD; 914 915 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 916 goto out; 917 918 /* For convenience's sake, we compare raw xdr'd attributes in 919 * nfsd4_proc_verify; however we still decode here just to return 920 * correct error in case of bad xdr. */ 921 #if 0 922 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 923 if (status == nfserr_inval) { 924 status = nfserrno(status); 925 goto out; 926 } 927 #endif 928 READ_BUF(4); 929 READ32(verify->ve_attrlen); 930 READ_BUF(verify->ve_attrlen); 931 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 932 933 DECODE_TAIL; 934 } 935 936 static __be32 937 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 938 { 939 int avail; 940 int v; 941 int len; 942 DECODE_HEAD; 943 944 READ_BUF(sizeof(stateid_opaque_t) + 20); 945 READ32(write->wr_stateid.si_generation); 946 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); 947 READ64(write->wr_offset); 948 READ32(write->wr_stable_how); 949 if (write->wr_stable_how > 2) 950 goto xdr_error; 951 READ32(write->wr_buflen); 952 953 /* Sorry .. no magic macros for this.. * 954 * READ_BUF(write->wr_buflen); 955 * SAVEMEM(write->wr_buf, write->wr_buflen); 956 */ 957 avail = (char*)argp->end - (char*)argp->p; 958 if (avail + argp->pagelen < write->wr_buflen) { 959 dprintk("NFSD: xdr error (%s:%d)\n", 960 __FILE__, __LINE__); 961 goto xdr_error; 962 } 963 argp->rqstp->rq_vec[0].iov_base = p; 964 argp->rqstp->rq_vec[0].iov_len = avail; 965 v = 0; 966 len = write->wr_buflen; 967 while (len > argp->rqstp->rq_vec[v].iov_len) { 968 len -= argp->rqstp->rq_vec[v].iov_len; 969 v++; 970 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 971 argp->pagelist++; 972 if (argp->pagelen >= PAGE_SIZE) { 973 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 974 argp->pagelen -= PAGE_SIZE; 975 } else { 976 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 977 argp->pagelen -= len; 978 } 979 } 980 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 981 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 982 argp->rqstp->rq_vec[v].iov_len = len; 983 write->wr_vlen = v+1; 984 985 DECODE_TAIL; 986 } 987 988 static __be32 989 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 990 { 991 DECODE_HEAD; 992 993 READ_BUF(12); 994 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 995 READ32(rlockowner->rl_owner.len); 996 READ_BUF(rlockowner->rl_owner.len); 997 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 998 999 DECODE_TAIL; 1000 } 1001 1002 static __be32 1003 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1004 { 1005 DECODE_HEAD; 1006 struct nfsd4_op *op; 1007 int i; 1008 1009 /* 1010 * XXX: According to spec, we should check the tag 1011 * for UTF-8 compliance. I'm postponing this for 1012 * now because it seems that some clients do use 1013 * binary tags. 1014 */ 1015 READ_BUF(4); 1016 READ32(argp->taglen); 1017 READ_BUF(argp->taglen + 8); 1018 SAVEMEM(argp->tag, argp->taglen); 1019 READ32(argp->minorversion); 1020 READ32(argp->opcnt); 1021 1022 if (argp->taglen > NFSD4_MAX_TAGLEN) 1023 goto xdr_error; 1024 if (argp->opcnt > 100) 1025 goto xdr_error; 1026 1027 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1028 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1029 if (!argp->ops) { 1030 argp->ops = argp->iops; 1031 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1032 goto xdr_error; 1033 } 1034 } 1035 1036 for (i = 0; i < argp->opcnt; i++) { 1037 op = &argp->ops[i]; 1038 op->replay = NULL; 1039 1040 /* 1041 * We can't use READ_BUF() here because we need to handle 1042 * a missing opcode as an OP_WRITE + 1. So we need to check 1043 * to see if we're truly at the end of our buffer or if there 1044 * is another page we need to flip to. 1045 */ 1046 1047 if (argp->p == argp->end) { 1048 if (argp->pagelen < 4) { 1049 /* There isn't an opcode still on the wire */ 1050 op->opnum = OP_WRITE + 1; 1051 op->status = nfserr_bad_xdr; 1052 argp->opcnt = i+1; 1053 break; 1054 } 1055 1056 /* 1057 * False alarm. We just hit a page boundary, but there 1058 * is still data available. Move pointer across page 1059 * boundary. *snip from READ_BUF* 1060 */ 1061 argp->p = page_address(argp->pagelist[0]); 1062 argp->pagelist++; 1063 if (argp->pagelen < PAGE_SIZE) { 1064 argp->end = p + (argp->pagelen>>2); 1065 argp->pagelen = 0; 1066 } else { 1067 argp->end = p + (PAGE_SIZE>>2); 1068 argp->pagelen -= PAGE_SIZE; 1069 } 1070 } 1071 op->opnum = ntohl(*argp->p++); 1072 1073 switch (op->opnum) { 1074 case 2: /* Reserved operation */ 1075 op->opnum = OP_ILLEGAL; 1076 if (argp->minorversion == 0) 1077 op->status = nfserr_op_illegal; 1078 else 1079 op->status = nfserr_minor_vers_mismatch; 1080 break; 1081 case OP_ACCESS: 1082 op->status = nfsd4_decode_access(argp, &op->u.access); 1083 break; 1084 case OP_CLOSE: 1085 op->status = nfsd4_decode_close(argp, &op->u.close); 1086 break; 1087 case OP_COMMIT: 1088 op->status = nfsd4_decode_commit(argp, &op->u.commit); 1089 break; 1090 case OP_CREATE: 1091 op->status = nfsd4_decode_create(argp, &op->u.create); 1092 break; 1093 case OP_DELEGRETURN: 1094 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); 1095 break; 1096 case OP_GETATTR: 1097 op->status = nfsd4_decode_getattr(argp, &op->u.getattr); 1098 break; 1099 case OP_GETFH: 1100 op->status = nfs_ok; 1101 break; 1102 case OP_LINK: 1103 op->status = nfsd4_decode_link(argp, &op->u.link); 1104 break; 1105 case OP_LOCK: 1106 op->status = nfsd4_decode_lock(argp, &op->u.lock); 1107 break; 1108 case OP_LOCKT: 1109 op->status = nfsd4_decode_lockt(argp, &op->u.lockt); 1110 break; 1111 case OP_LOCKU: 1112 op->status = nfsd4_decode_locku(argp, &op->u.locku); 1113 break; 1114 case OP_LOOKUP: 1115 op->status = nfsd4_decode_lookup(argp, &op->u.lookup); 1116 break; 1117 case OP_LOOKUPP: 1118 op->status = nfs_ok; 1119 break; 1120 case OP_NVERIFY: 1121 op->status = nfsd4_decode_verify(argp, &op->u.nverify); 1122 break; 1123 case OP_OPEN: 1124 op->status = nfsd4_decode_open(argp, &op->u.open); 1125 break; 1126 case OP_OPEN_CONFIRM: 1127 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); 1128 break; 1129 case OP_OPEN_DOWNGRADE: 1130 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); 1131 break; 1132 case OP_PUTFH: 1133 op->status = nfsd4_decode_putfh(argp, &op->u.putfh); 1134 break; 1135 case OP_PUTROOTFH: 1136 op->status = nfs_ok; 1137 break; 1138 case OP_READ: 1139 op->status = nfsd4_decode_read(argp, &op->u.read); 1140 break; 1141 case OP_READDIR: 1142 op->status = nfsd4_decode_readdir(argp, &op->u.readdir); 1143 break; 1144 case OP_READLINK: 1145 op->status = nfs_ok; 1146 break; 1147 case OP_REMOVE: 1148 op->status = nfsd4_decode_remove(argp, &op->u.remove); 1149 break; 1150 case OP_RENAME: 1151 op->status = nfsd4_decode_rename(argp, &op->u.rename); 1152 break; 1153 case OP_RESTOREFH: 1154 op->status = nfs_ok; 1155 break; 1156 case OP_RENEW: 1157 op->status = nfsd4_decode_renew(argp, &op->u.renew); 1158 break; 1159 case OP_SAVEFH: 1160 op->status = nfs_ok; 1161 break; 1162 case OP_SECINFO: 1163 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo); 1164 break; 1165 case OP_SETATTR: 1166 op->status = nfsd4_decode_setattr(argp, &op->u.setattr); 1167 break; 1168 case OP_SETCLIENTID: 1169 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); 1170 break; 1171 case OP_SETCLIENTID_CONFIRM: 1172 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); 1173 break; 1174 case OP_VERIFY: 1175 op->status = nfsd4_decode_verify(argp, &op->u.verify); 1176 break; 1177 case OP_WRITE: 1178 op->status = nfsd4_decode_write(argp, &op->u.write); 1179 break; 1180 case OP_RELEASE_LOCKOWNER: 1181 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); 1182 break; 1183 default: 1184 op->opnum = OP_ILLEGAL; 1185 op->status = nfserr_op_illegal; 1186 break; 1187 } 1188 1189 if (op->status) { 1190 argp->opcnt = i+1; 1191 break; 1192 } 1193 } 1194 1195 DECODE_TAIL; 1196 } 1197 /* 1198 * END OF "GENERIC" DECODE ROUTINES. 1199 */ 1200 1201 /* 1202 * START OF "GENERIC" ENCODE ROUTINES. 1203 * These may look a little ugly since they are imported from a "generic" 1204 * set of XDR encode/decode routines which are intended to be shared by 1205 * all of our NFSv4 implementations (OpenBSD, MacOS X...). 1206 * 1207 * If the pain of reading these is too great, it should be a straightforward 1208 * task to translate them into Linux-specific versions which are more 1209 * consistent with the style used in NFSv2/v3... 1210 */ 1211 #define ENCODE_HEAD __be32 *p 1212 1213 #define WRITE32(n) *p++ = htonl(n) 1214 #define WRITE64(n) do { \ 1215 *p++ = htonl((u32)((n) >> 32)); \ 1216 *p++ = htonl((u32)(n)); \ 1217 } while (0) 1218 #define WRITEMEM(ptr,nbytes) do { \ 1219 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1220 memcpy(p, ptr, nbytes); \ 1221 p += XDR_QUADLEN(nbytes); \ 1222 } while (0) 1223 #define WRITECINFO(c) do { \ 1224 *p++ = htonl(c.atomic); \ 1225 *p++ = htonl(c.before_ctime_sec); \ 1226 *p++ = htonl(c.before_ctime_nsec); \ 1227 *p++ = htonl(c.after_ctime_sec); \ 1228 *p++ = htonl(c.after_ctime_nsec); \ 1229 } while (0) 1230 1231 #define RESERVE_SPACE(nbytes) do { \ 1232 p = resp->p; \ 1233 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1234 } while (0) 1235 #define ADJUST_ARGS() resp->p = p 1236 1237 /* 1238 * Header routine to setup seqid operation replay cache 1239 */ 1240 #define ENCODE_SEQID_OP_HEAD \ 1241 __be32 *p; \ 1242 __be32 *save; \ 1243 \ 1244 save = resp->p; 1245 1246 /* 1247 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1248 * is where sequence id's are incremented, and the replay cache is filled. 1249 * Note that we increment sequence id's here, at the last moment, so we're sure 1250 * we know whether the error to be returned is a sequence id mutating error. 1251 */ 1252 1253 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1254 if (seqid_mutating_err(nfserr) && stateowner) { \ 1255 stateowner->so_seqid++; \ 1256 stateowner->so_replay.rp_status = nfserr; \ 1257 stateowner->so_replay.rp_buflen = \ 1258 (((char *)(resp)->p - (char *)save)); \ 1259 memcpy(stateowner->so_replay.rp_buf, save, \ 1260 stateowner->so_replay.rp_buflen); \ 1261 } } while (0); 1262 1263 /* Encode as an array of strings the string given with components 1264 * seperated @sep. 1265 */ 1266 static __be32 nfsd4_encode_components(char sep, char *components, 1267 __be32 **pp, int *buflen) 1268 { 1269 __be32 *p = *pp; 1270 __be32 *countp = p; 1271 int strlen, count=0; 1272 char *str, *end; 1273 1274 dprintk("nfsd4_encode_components(%s)\n", components); 1275 if ((*buflen -= 4) < 0) 1276 return nfserr_resource; 1277 WRITE32(0); /* We will fill this in with @count later */ 1278 end = str = components; 1279 while (*end) { 1280 for (; *end && (*end != sep); end++) 1281 ; /* Point to end of component */ 1282 strlen = end - str; 1283 if (strlen) { 1284 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1285 return nfserr_resource; 1286 WRITE32(strlen); 1287 WRITEMEM(str, strlen); 1288 count++; 1289 } 1290 else 1291 end++; 1292 str = end; 1293 } 1294 *pp = p; 1295 p = countp; 1296 WRITE32(count); 1297 return 0; 1298 } 1299 1300 /* 1301 * encode a location element of a fs_locations structure 1302 */ 1303 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1304 __be32 **pp, int *buflen) 1305 { 1306 __be32 status; 1307 __be32 *p = *pp; 1308 1309 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1310 if (status) 1311 return status; 1312 status = nfsd4_encode_components('/', location->path, &p, buflen); 1313 if (status) 1314 return status; 1315 *pp = p; 1316 return 0; 1317 } 1318 1319 /* 1320 * Return the path to an export point in the pseudo filesystem namespace 1321 * Returned string is safe to use as long as the caller holds a reference 1322 * to @exp. 1323 */ 1324 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1325 { 1326 struct svc_fh tmp_fh; 1327 char *path, *rootpath; 1328 1329 fh_init(&tmp_fh, NFS4_FHSIZE); 1330 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1331 if (*stat) 1332 return NULL; 1333 rootpath = tmp_fh.fh_export->ex_pathname; 1334 1335 path = exp->ex_pathname; 1336 1337 if (strncmp(path, rootpath, strlen(rootpath))) { 1338 dprintk("nfsd: fs_locations failed;" 1339 "%s is not contained in %s\n", path, rootpath); 1340 *stat = nfserr_notsupp; 1341 return NULL; 1342 } 1343 1344 return path + strlen(rootpath); 1345 } 1346 1347 /* 1348 * encode a fs_locations structure 1349 */ 1350 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1351 struct svc_export *exp, 1352 __be32 **pp, int *buflen) 1353 { 1354 __be32 status; 1355 int i; 1356 __be32 *p = *pp; 1357 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1358 char *root = nfsd4_path(rqstp, exp, &status); 1359 1360 if (status) 1361 return status; 1362 status = nfsd4_encode_components('/', root, &p, buflen); 1363 if (status) 1364 return status; 1365 if ((*buflen -= 4) < 0) 1366 return nfserr_resource; 1367 WRITE32(fslocs->locations_count); 1368 for (i=0; i<fslocs->locations_count; i++) { 1369 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1370 &p, buflen); 1371 if (status) 1372 return status; 1373 } 1374 *pp = p; 1375 return 0; 1376 } 1377 1378 static u32 nfs4_ftypes[16] = { 1379 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1380 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1381 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1382 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1383 }; 1384 1385 static __be32 1386 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1387 __be32 **p, int *buflen) 1388 { 1389 int status; 1390 1391 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1392 return nfserr_resource; 1393 if (whotype != NFS4_ACL_WHO_NAMED) 1394 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1395 else if (group) 1396 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1397 else 1398 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1399 if (status < 0) 1400 return nfserrno(status); 1401 *p = xdr_encode_opaque(*p, NULL, status); 1402 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1403 BUG_ON(*buflen < 0); 1404 return 0; 1405 } 1406 1407 static inline __be32 1408 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1409 { 1410 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1411 } 1412 1413 static inline __be32 1414 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1415 { 1416 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1417 } 1418 1419 static inline __be32 1420 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1421 __be32 **p, int *buflen) 1422 { 1423 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1424 } 1425 1426 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1427 FATTR4_WORD0_RDATTR_ERROR) 1428 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1429 1430 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1431 { 1432 /* As per referral draft: */ 1433 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1434 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1435 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1436 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1437 *rdattr_err = NFSERR_MOVED; 1438 else 1439 return nfserr_moved; 1440 } 1441 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1442 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1443 return 0; 1444 } 1445 1446 /* 1447 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1448 * ourselves. 1449 * 1450 * @countp is the buffer size in _words_; upon successful return this becomes 1451 * replaced with the number of words written. 1452 */ 1453 __be32 1454 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1455 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1456 struct svc_rqst *rqstp, int ignore_crossmnt) 1457 { 1458 u32 bmval0 = bmval[0]; 1459 u32 bmval1 = bmval[1]; 1460 struct kstat stat; 1461 struct svc_fh tempfh; 1462 struct kstatfs statfs; 1463 int buflen = *countp << 2; 1464 __be32 *attrlenp; 1465 u32 dummy; 1466 u64 dummy64; 1467 u32 rdattr_err = 0; 1468 __be32 *p = buffer; 1469 __be32 status; 1470 int err; 1471 int aclsupport = 0; 1472 struct nfs4_acl *acl = NULL; 1473 1474 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1475 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); 1476 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); 1477 1478 if (exp->ex_fslocs.migrated) { 1479 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1480 if (status) 1481 goto out; 1482 } 1483 1484 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1485 if (err) 1486 goto out_nfserr; 1487 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1488 FATTR4_WORD0_MAXNAME)) || 1489 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1490 FATTR4_WORD1_SPACE_TOTAL))) { 1491 err = vfs_statfs(dentry, &statfs); 1492 if (err) 1493 goto out_nfserr; 1494 } 1495 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1496 fh_init(&tempfh, NFS4_FHSIZE); 1497 status = fh_compose(&tempfh, exp, dentry, NULL); 1498 if (status) 1499 goto out; 1500 fhp = &tempfh; 1501 } 1502 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1503 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1504 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1505 aclsupport = (err == 0); 1506 if (bmval0 & FATTR4_WORD0_ACL) { 1507 if (err == -EOPNOTSUPP) 1508 bmval0 &= ~FATTR4_WORD0_ACL; 1509 else if (err == -EINVAL) { 1510 status = nfserr_attrnotsupp; 1511 goto out; 1512 } else if (err != 0) 1513 goto out_nfserr; 1514 } 1515 } 1516 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1517 if (exp->ex_fslocs.locations == NULL) { 1518 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1519 } 1520 } 1521 if ((buflen -= 16) < 0) 1522 goto out_resource; 1523 1524 WRITE32(2); 1525 WRITE32(bmval0); 1526 WRITE32(bmval1); 1527 attrlenp = p++; /* to be backfilled later */ 1528 1529 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1530 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0; 1531 if ((buflen -= 12) < 0) 1532 goto out_resource; 1533 if (!aclsupport) 1534 word0 &= ~FATTR4_WORD0_ACL; 1535 if (!exp->ex_fslocs.locations) 1536 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1537 WRITE32(2); 1538 WRITE32(word0); 1539 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); 1540 } 1541 if (bmval0 & FATTR4_WORD0_TYPE) { 1542 if ((buflen -= 4) < 0) 1543 goto out_resource; 1544 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1545 if (dummy == NF4BAD) 1546 goto out_serverfault; 1547 WRITE32(dummy); 1548 } 1549 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1550 if ((buflen -= 4) < 0) 1551 goto out_resource; 1552 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1553 WRITE32(NFS4_FH_PERSISTENT); 1554 else 1555 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1556 } 1557 if (bmval0 & FATTR4_WORD0_CHANGE) { 1558 /* 1559 * Note: This _must_ be consistent with the scheme for writing 1560 * change_info, so any changes made here must be reflected there 1561 * as well. (See xdr4.h:set_change_info() and the WRITECINFO() 1562 * macro above.) 1563 */ 1564 if ((buflen -= 8) < 0) 1565 goto out_resource; 1566 WRITE32(stat.ctime.tv_sec); 1567 WRITE32(stat.ctime.tv_nsec); 1568 } 1569 if (bmval0 & FATTR4_WORD0_SIZE) { 1570 if ((buflen -= 8) < 0) 1571 goto out_resource; 1572 WRITE64(stat.size); 1573 } 1574 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1575 if ((buflen -= 4) < 0) 1576 goto out_resource; 1577 WRITE32(1); 1578 } 1579 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1580 if ((buflen -= 4) < 0) 1581 goto out_resource; 1582 WRITE32(1); 1583 } 1584 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1585 if ((buflen -= 4) < 0) 1586 goto out_resource; 1587 WRITE32(0); 1588 } 1589 if (bmval0 & FATTR4_WORD0_FSID) { 1590 if ((buflen -= 16) < 0) 1591 goto out_resource; 1592 if (exp->ex_fslocs.migrated) { 1593 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1594 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1595 } else switch(fsid_source(fhp)) { 1596 case FSIDSOURCE_FSID: 1597 WRITE64((u64)exp->ex_fsid); 1598 WRITE64((u64)0); 1599 break; 1600 case FSIDSOURCE_DEV: 1601 WRITE32(0); 1602 WRITE32(MAJOR(stat.dev)); 1603 WRITE32(0); 1604 WRITE32(MINOR(stat.dev)); 1605 break; 1606 case FSIDSOURCE_UUID: 1607 WRITEMEM(exp->ex_uuid, 16); 1608 break; 1609 } 1610 } 1611 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1612 if ((buflen -= 4) < 0) 1613 goto out_resource; 1614 WRITE32(0); 1615 } 1616 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1617 if ((buflen -= 4) < 0) 1618 goto out_resource; 1619 WRITE32(NFSD_LEASE_TIME); 1620 } 1621 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1622 if ((buflen -= 4) < 0) 1623 goto out_resource; 1624 WRITE32(rdattr_err); 1625 } 1626 if (bmval0 & FATTR4_WORD0_ACL) { 1627 struct nfs4_ace *ace; 1628 1629 if (acl == NULL) { 1630 if ((buflen -= 4) < 0) 1631 goto out_resource; 1632 1633 WRITE32(0); 1634 goto out_acl; 1635 } 1636 if ((buflen -= 4) < 0) 1637 goto out_resource; 1638 WRITE32(acl->naces); 1639 1640 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1641 if ((buflen -= 4*3) < 0) 1642 goto out_resource; 1643 WRITE32(ace->type); 1644 WRITE32(ace->flag); 1645 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1646 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1647 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1648 &p, &buflen); 1649 if (status == nfserr_resource) 1650 goto out_resource; 1651 if (status) 1652 goto out; 1653 } 1654 } 1655 out_acl: 1656 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1657 if ((buflen -= 4) < 0) 1658 goto out_resource; 1659 WRITE32(aclsupport ? 1660 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1661 } 1662 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1663 if ((buflen -= 4) < 0) 1664 goto out_resource; 1665 WRITE32(1); 1666 } 1667 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1668 if ((buflen -= 4) < 0) 1669 goto out_resource; 1670 WRITE32(1); 1671 } 1672 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1673 if ((buflen -= 4) < 0) 1674 goto out_resource; 1675 WRITE32(1); 1676 } 1677 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1678 if ((buflen -= 4) < 0) 1679 goto out_resource; 1680 WRITE32(1); 1681 } 1682 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1683 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1684 if (buflen < 0) 1685 goto out_resource; 1686 WRITE32(fhp->fh_handle.fh_size); 1687 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1688 } 1689 if (bmval0 & FATTR4_WORD0_FILEID) { 1690 if ((buflen -= 8) < 0) 1691 goto out_resource; 1692 WRITE64(stat.ino); 1693 } 1694 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1695 if ((buflen -= 8) < 0) 1696 goto out_resource; 1697 WRITE64((u64) statfs.f_ffree); 1698 } 1699 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1700 if ((buflen -= 8) < 0) 1701 goto out_resource; 1702 WRITE64((u64) statfs.f_ffree); 1703 } 1704 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1705 if ((buflen -= 8) < 0) 1706 goto out_resource; 1707 WRITE64((u64) statfs.f_files); 1708 } 1709 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1710 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1711 if (status == nfserr_resource) 1712 goto out_resource; 1713 if (status) 1714 goto out; 1715 } 1716 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1717 if ((buflen -= 4) < 0) 1718 goto out_resource; 1719 WRITE32(1); 1720 } 1721 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1722 if ((buflen -= 8) < 0) 1723 goto out_resource; 1724 WRITE64(~(u64)0); 1725 } 1726 if (bmval0 & FATTR4_WORD0_MAXLINK) { 1727 if ((buflen -= 4) < 0) 1728 goto out_resource; 1729 WRITE32(255); 1730 } 1731 if (bmval0 & FATTR4_WORD0_MAXNAME) { 1732 if ((buflen -= 4) < 0) 1733 goto out_resource; 1734 WRITE32(statfs.f_namelen); 1735 } 1736 if (bmval0 & FATTR4_WORD0_MAXREAD) { 1737 if ((buflen -= 8) < 0) 1738 goto out_resource; 1739 WRITE64((u64) svc_max_payload(rqstp)); 1740 } 1741 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 1742 if ((buflen -= 8) < 0) 1743 goto out_resource; 1744 WRITE64((u64) svc_max_payload(rqstp)); 1745 } 1746 if (bmval1 & FATTR4_WORD1_MODE) { 1747 if ((buflen -= 4) < 0) 1748 goto out_resource; 1749 WRITE32(stat.mode & S_IALLUGO); 1750 } 1751 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 1752 if ((buflen -= 4) < 0) 1753 goto out_resource; 1754 WRITE32(1); 1755 } 1756 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 1757 if ((buflen -= 4) < 0) 1758 goto out_resource; 1759 WRITE32(stat.nlink); 1760 } 1761 if (bmval1 & FATTR4_WORD1_OWNER) { 1762 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 1763 if (status == nfserr_resource) 1764 goto out_resource; 1765 if (status) 1766 goto out; 1767 } 1768 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 1769 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 1770 if (status == nfserr_resource) 1771 goto out_resource; 1772 if (status) 1773 goto out; 1774 } 1775 if (bmval1 & FATTR4_WORD1_RAWDEV) { 1776 if ((buflen -= 8) < 0) 1777 goto out_resource; 1778 WRITE32((u32) MAJOR(stat.rdev)); 1779 WRITE32((u32) MINOR(stat.rdev)); 1780 } 1781 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 1782 if ((buflen -= 8) < 0) 1783 goto out_resource; 1784 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 1785 WRITE64(dummy64); 1786 } 1787 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 1788 if ((buflen -= 8) < 0) 1789 goto out_resource; 1790 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 1791 WRITE64(dummy64); 1792 } 1793 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 1794 if ((buflen -= 8) < 0) 1795 goto out_resource; 1796 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 1797 WRITE64(dummy64); 1798 } 1799 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 1800 if ((buflen -= 8) < 0) 1801 goto out_resource; 1802 dummy64 = (u64)stat.blocks << 9; 1803 WRITE64(dummy64); 1804 } 1805 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 1806 if ((buflen -= 12) < 0) 1807 goto out_resource; 1808 WRITE32(0); 1809 WRITE32(stat.atime.tv_sec); 1810 WRITE32(stat.atime.tv_nsec); 1811 } 1812 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 1813 if ((buflen -= 12) < 0) 1814 goto out_resource; 1815 WRITE32(0); 1816 WRITE32(1); 1817 WRITE32(0); 1818 } 1819 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 1820 if ((buflen -= 12) < 0) 1821 goto out_resource; 1822 WRITE32(0); 1823 WRITE32(stat.ctime.tv_sec); 1824 WRITE32(stat.ctime.tv_nsec); 1825 } 1826 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 1827 if ((buflen -= 12) < 0) 1828 goto out_resource; 1829 WRITE32(0); 1830 WRITE32(stat.mtime.tv_sec); 1831 WRITE32(stat.mtime.tv_nsec); 1832 } 1833 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 1834 if ((buflen -= 8) < 0) 1835 goto out_resource; 1836 /* 1837 * Get parent's attributes if not ignoring crossmount 1838 * and this is the root of a cross-mounted filesystem. 1839 */ 1840 if (ignore_crossmnt == 0 && 1841 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { 1842 err = vfs_getattr(exp->ex_path.mnt->mnt_parent, 1843 exp->ex_path.mnt->mnt_mountpoint, &stat); 1844 if (err) 1845 goto out_nfserr; 1846 } 1847 WRITE64(stat.ino); 1848 } 1849 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1850 *countp = p - buffer; 1851 status = nfs_ok; 1852 1853 out: 1854 kfree(acl); 1855 if (fhp == &tempfh) 1856 fh_put(&tempfh); 1857 return status; 1858 out_nfserr: 1859 status = nfserrno(err); 1860 goto out; 1861 out_resource: 1862 *countp = 0; 1863 status = nfserr_resource; 1864 goto out; 1865 out_serverfault: 1866 status = nfserr_serverfault; 1867 goto out; 1868 } 1869 1870 static __be32 1871 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 1872 const char *name, int namlen, __be32 *p, int *buflen) 1873 { 1874 struct svc_export *exp = cd->rd_fhp->fh_export; 1875 struct dentry *dentry; 1876 __be32 nfserr; 1877 int ignore_crossmnt = 0; 1878 1879 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 1880 if (IS_ERR(dentry)) 1881 return nfserrno(PTR_ERR(dentry)); 1882 1883 exp_get(exp); 1884 /* 1885 * In the case of a mountpoint, the client may be asking for 1886 * attributes that are only properties of the underlying filesystem 1887 * as opposed to the cross-mounted file system. In such a case, 1888 * we will not follow the cross mount and will fill the attribtutes 1889 * directly from the mountpoint dentry. 1890 */ 1891 if (d_mountpoint(dentry) && 1892 (cd->rd_bmval[0] & ~FATTR4_WORD0_RDATTR_ERROR) == 0 && 1893 (cd->rd_bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) == 0) 1894 ignore_crossmnt = 1; 1895 else if (d_mountpoint(dentry)) { 1896 int err; 1897 1898 /* 1899 * Why the heck aren't we just using nfsd_lookup?? 1900 * Different "."/".." handling? Something else? 1901 * At least, add a comment here to explain.... 1902 */ 1903 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 1904 if (err) { 1905 nfserr = nfserrno(err); 1906 goto out_put; 1907 } 1908 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 1909 if (nfserr) 1910 goto out_put; 1911 1912 } 1913 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 1914 cd->rd_rqstp, ignore_crossmnt); 1915 out_put: 1916 dput(dentry); 1917 exp_put(exp); 1918 return nfserr; 1919 } 1920 1921 static __be32 * 1922 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 1923 { 1924 __be32 *attrlenp; 1925 1926 if (buflen < 6) 1927 return NULL; 1928 *p++ = htonl(2); 1929 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 1930 *p++ = htonl(0); /* bmval1 */ 1931 1932 attrlenp = p++; 1933 *p++ = nfserr; /* no htonl */ 1934 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 1935 return p; 1936 } 1937 1938 static int 1939 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 1940 loff_t offset, u64 ino, unsigned int d_type) 1941 { 1942 struct readdir_cd *ccd = ccdv; 1943 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 1944 int buflen; 1945 __be32 *p = cd->buffer; 1946 __be32 nfserr = nfserr_toosmall; 1947 1948 /* In nfsv4, "." and ".." never make it onto the wire.. */ 1949 if (name && isdotent(name, namlen)) { 1950 cd->common.err = nfs_ok; 1951 return 0; 1952 } 1953 1954 if (cd->offset) 1955 xdr_encode_hyper(cd->offset, (u64) offset); 1956 1957 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 1958 if (buflen < 0) 1959 goto fail; 1960 1961 *p++ = xdr_one; /* mark entry present */ 1962 cd->offset = p; /* remember pointer */ 1963 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 1964 p = xdr_encode_array(p, name, namlen); /* name length & name */ 1965 1966 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 1967 switch (nfserr) { 1968 case nfs_ok: 1969 p += buflen; 1970 break; 1971 case nfserr_resource: 1972 nfserr = nfserr_toosmall; 1973 goto fail; 1974 case nfserr_dropit: 1975 goto fail; 1976 default: 1977 /* 1978 * If the client requested the RDATTR_ERROR attribute, 1979 * we stuff the error code into this attribute 1980 * and continue. If this attribute was not requested, 1981 * then in accordance with the spec, we fail the 1982 * entire READDIR operation(!) 1983 */ 1984 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 1985 goto fail; 1986 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 1987 if (p == NULL) { 1988 nfserr = nfserr_toosmall; 1989 goto fail; 1990 } 1991 } 1992 cd->buflen -= (p - cd->buffer); 1993 cd->buffer = p; 1994 cd->common.err = nfs_ok; 1995 return 0; 1996 fail: 1997 cd->common.err = nfserr; 1998 return -EINVAL; 1999 } 2000 2001 static void 2002 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2003 { 2004 ENCODE_HEAD; 2005 2006 if (!nfserr) { 2007 RESERVE_SPACE(8); 2008 WRITE32(access->ac_supported); 2009 WRITE32(access->ac_resp_access); 2010 ADJUST_ARGS(); 2011 } 2012 } 2013 2014 static void 2015 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2016 { 2017 ENCODE_SEQID_OP_HEAD; 2018 2019 if (!nfserr) { 2020 RESERVE_SPACE(sizeof(stateid_t)); 2021 WRITE32(close->cl_stateid.si_generation); 2022 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); 2023 ADJUST_ARGS(); 2024 } 2025 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2026 } 2027 2028 2029 static void 2030 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2031 { 2032 ENCODE_HEAD; 2033 2034 if (!nfserr) { 2035 RESERVE_SPACE(8); 2036 WRITEMEM(commit->co_verf.data, 8); 2037 ADJUST_ARGS(); 2038 } 2039 } 2040 2041 static void 2042 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2043 { 2044 ENCODE_HEAD; 2045 2046 if (!nfserr) { 2047 RESERVE_SPACE(32); 2048 WRITECINFO(create->cr_cinfo); 2049 WRITE32(2); 2050 WRITE32(create->cr_bmval[0]); 2051 WRITE32(create->cr_bmval[1]); 2052 ADJUST_ARGS(); 2053 } 2054 } 2055 2056 static __be32 2057 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2058 { 2059 struct svc_fh *fhp = getattr->ga_fhp; 2060 int buflen; 2061 2062 if (nfserr) 2063 return nfserr; 2064 2065 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2066 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2067 resp->p, &buflen, getattr->ga_bmval, 2068 resp->rqstp, 0); 2069 if (!nfserr) 2070 resp->p += buflen; 2071 return nfserr; 2072 } 2073 2074 static void 2075 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp) 2076 { 2077 unsigned int len; 2078 ENCODE_HEAD; 2079 2080 if (!nfserr) { 2081 len = fhp->fh_handle.fh_size; 2082 RESERVE_SPACE(len + 4); 2083 WRITE32(len); 2084 WRITEMEM(&fhp->fh_handle.fh_base, len); 2085 ADJUST_ARGS(); 2086 } 2087 } 2088 2089 /* 2090 * Including all fields other than the name, a LOCK4denied structure requires 2091 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2092 */ 2093 static void 2094 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2095 { 2096 ENCODE_HEAD; 2097 2098 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2099 WRITE64(ld->ld_start); 2100 WRITE64(ld->ld_length); 2101 WRITE32(ld->ld_type); 2102 if (ld->ld_sop) { 2103 WRITEMEM(&ld->ld_clientid, 8); 2104 WRITE32(ld->ld_sop->so_owner.len); 2105 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2106 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2107 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2108 WRITE64((u64)0); /* clientid */ 2109 WRITE32(0); /* length of owner name */ 2110 } 2111 ADJUST_ARGS(); 2112 } 2113 2114 static void 2115 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2116 { 2117 ENCODE_SEQID_OP_HEAD; 2118 2119 if (!nfserr) { 2120 RESERVE_SPACE(4 + sizeof(stateid_t)); 2121 WRITE32(lock->lk_resp_stateid.si_generation); 2122 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2123 ADJUST_ARGS(); 2124 } else if (nfserr == nfserr_denied) 2125 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2126 2127 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2128 } 2129 2130 static void 2131 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2132 { 2133 if (nfserr == nfserr_denied) 2134 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2135 } 2136 2137 static void 2138 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2139 { 2140 ENCODE_SEQID_OP_HEAD; 2141 2142 if (!nfserr) { 2143 RESERVE_SPACE(sizeof(stateid_t)); 2144 WRITE32(locku->lu_stateid.si_generation); 2145 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); 2146 ADJUST_ARGS(); 2147 } 2148 2149 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2150 } 2151 2152 2153 static void 2154 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2155 { 2156 ENCODE_HEAD; 2157 2158 if (!nfserr) { 2159 RESERVE_SPACE(20); 2160 WRITECINFO(link->li_cinfo); 2161 ADJUST_ARGS(); 2162 } 2163 } 2164 2165 2166 static void 2167 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2168 { 2169 ENCODE_SEQID_OP_HEAD; 2170 2171 if (nfserr) 2172 goto out; 2173 2174 RESERVE_SPACE(36 + sizeof(stateid_t)); 2175 WRITE32(open->op_stateid.si_generation); 2176 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); 2177 WRITECINFO(open->op_cinfo); 2178 WRITE32(open->op_rflags); 2179 WRITE32(2); 2180 WRITE32(open->op_bmval[0]); 2181 WRITE32(open->op_bmval[1]); 2182 WRITE32(open->op_delegate_type); 2183 ADJUST_ARGS(); 2184 2185 switch (open->op_delegate_type) { 2186 case NFS4_OPEN_DELEGATE_NONE: 2187 break; 2188 case NFS4_OPEN_DELEGATE_READ: 2189 RESERVE_SPACE(20 + sizeof(stateid_t)); 2190 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2191 WRITE32(open->op_recall); 2192 2193 /* 2194 * TODO: ACE's in delegations 2195 */ 2196 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2197 WRITE32(0); 2198 WRITE32(0); 2199 WRITE32(0); /* XXX: is NULL principal ok? */ 2200 ADJUST_ARGS(); 2201 break; 2202 case NFS4_OPEN_DELEGATE_WRITE: 2203 RESERVE_SPACE(32 + sizeof(stateid_t)); 2204 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); 2205 WRITE32(0); 2206 2207 /* 2208 * TODO: space_limit's in delegations 2209 */ 2210 WRITE32(NFS4_LIMIT_SIZE); 2211 WRITE32(~(u32)0); 2212 WRITE32(~(u32)0); 2213 2214 /* 2215 * TODO: ACE's in delegations 2216 */ 2217 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2218 WRITE32(0); 2219 WRITE32(0); 2220 WRITE32(0); /* XXX: is NULL principal ok? */ 2221 ADJUST_ARGS(); 2222 break; 2223 default: 2224 BUG(); 2225 } 2226 /* XXX save filehandle here */ 2227 out: 2228 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2229 } 2230 2231 static void 2232 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2233 { 2234 ENCODE_SEQID_OP_HEAD; 2235 2236 if (!nfserr) { 2237 RESERVE_SPACE(sizeof(stateid_t)); 2238 WRITE32(oc->oc_resp_stateid.si_generation); 2239 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); 2240 ADJUST_ARGS(); 2241 } 2242 2243 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2244 } 2245 2246 static void 2247 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2248 { 2249 ENCODE_SEQID_OP_HEAD; 2250 2251 if (!nfserr) { 2252 RESERVE_SPACE(sizeof(stateid_t)); 2253 WRITE32(od->od_stateid.si_generation); 2254 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); 2255 ADJUST_ARGS(); 2256 } 2257 2258 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2259 } 2260 2261 static __be32 2262 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2263 struct nfsd4_read *read) 2264 { 2265 u32 eof; 2266 int v, pn; 2267 unsigned long maxcount; 2268 long len; 2269 ENCODE_HEAD; 2270 2271 if (nfserr) 2272 return nfserr; 2273 if (resp->xbuf->page_len) 2274 return nfserr_resource; 2275 2276 RESERVE_SPACE(8); /* eof flag and byte count */ 2277 2278 maxcount = svc_max_payload(resp->rqstp); 2279 if (maxcount > read->rd_length) 2280 maxcount = read->rd_length; 2281 2282 len = maxcount; 2283 v = 0; 2284 while (len > 0) { 2285 pn = resp->rqstp->rq_resused++; 2286 resp->rqstp->rq_vec[v].iov_base = 2287 page_address(resp->rqstp->rq_respages[pn]); 2288 resp->rqstp->rq_vec[v].iov_len = 2289 len < PAGE_SIZE ? len : PAGE_SIZE; 2290 v++; 2291 len -= PAGE_SIZE; 2292 } 2293 read->rd_vlen = v; 2294 2295 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2296 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2297 &maxcount); 2298 2299 if (nfserr == nfserr_symlink) 2300 nfserr = nfserr_inval; 2301 if (nfserr) 2302 return nfserr; 2303 eof = (read->rd_offset + maxcount >= 2304 read->rd_fhp->fh_dentry->d_inode->i_size); 2305 2306 WRITE32(eof); 2307 WRITE32(maxcount); 2308 ADJUST_ARGS(); 2309 resp->xbuf->head[0].iov_len = (char*)p 2310 - (char*)resp->xbuf->head[0].iov_base; 2311 resp->xbuf->page_len = maxcount; 2312 2313 /* Use rest of head for padding and remaining ops: */ 2314 resp->xbuf->tail[0].iov_base = p; 2315 resp->xbuf->tail[0].iov_len = 0; 2316 if (maxcount&3) { 2317 RESERVE_SPACE(4); 2318 WRITE32(0); 2319 resp->xbuf->tail[0].iov_base += maxcount&3; 2320 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2321 ADJUST_ARGS(); 2322 } 2323 return 0; 2324 } 2325 2326 static __be32 2327 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2328 { 2329 int maxcount; 2330 char *page; 2331 ENCODE_HEAD; 2332 2333 if (nfserr) 2334 return nfserr; 2335 if (resp->xbuf->page_len) 2336 return nfserr_resource; 2337 2338 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2339 2340 maxcount = PAGE_SIZE; 2341 RESERVE_SPACE(4); 2342 2343 /* 2344 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2345 * if they would overflow the buffer. Is this kosher in NFSv4? If 2346 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2347 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2348 */ 2349 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2350 if (nfserr == nfserr_isdir) 2351 return nfserr_inval; 2352 if (nfserr) 2353 return nfserr; 2354 2355 WRITE32(maxcount); 2356 ADJUST_ARGS(); 2357 resp->xbuf->head[0].iov_len = (char*)p 2358 - (char*)resp->xbuf->head[0].iov_base; 2359 resp->xbuf->page_len = maxcount; 2360 2361 /* Use rest of head for padding and remaining ops: */ 2362 resp->xbuf->tail[0].iov_base = p; 2363 resp->xbuf->tail[0].iov_len = 0; 2364 if (maxcount&3) { 2365 RESERVE_SPACE(4); 2366 WRITE32(0); 2367 resp->xbuf->tail[0].iov_base += maxcount&3; 2368 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2369 ADJUST_ARGS(); 2370 } 2371 return 0; 2372 } 2373 2374 static __be32 2375 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2376 { 2377 int maxcount; 2378 loff_t offset; 2379 __be32 *page, *savep, *tailbase; 2380 ENCODE_HEAD; 2381 2382 if (nfserr) 2383 return nfserr; 2384 if (resp->xbuf->page_len) 2385 return nfserr_resource; 2386 2387 RESERVE_SPACE(8); /* verifier */ 2388 savep = p; 2389 2390 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2391 WRITE32(0); 2392 WRITE32(0); 2393 ADJUST_ARGS(); 2394 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2395 tailbase = p; 2396 2397 maxcount = PAGE_SIZE; 2398 if (maxcount > readdir->rd_maxcount) 2399 maxcount = readdir->rd_maxcount; 2400 2401 /* 2402 * Convert from bytes to words, account for the two words already 2403 * written, make sure to leave two words at the end for the next 2404 * pointer and eof field. 2405 */ 2406 maxcount = (maxcount >> 2) - 4; 2407 if (maxcount < 0) { 2408 nfserr = nfserr_toosmall; 2409 goto err_no_verf; 2410 } 2411 2412 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2413 readdir->common.err = 0; 2414 readdir->buflen = maxcount; 2415 readdir->buffer = page; 2416 readdir->offset = NULL; 2417 2418 offset = readdir->rd_cookie; 2419 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2420 &offset, 2421 &readdir->common, nfsd4_encode_dirent); 2422 if (nfserr == nfs_ok && 2423 readdir->common.err == nfserr_toosmall && 2424 readdir->buffer == page) 2425 nfserr = nfserr_toosmall; 2426 if (nfserr == nfserr_symlink) 2427 nfserr = nfserr_notdir; 2428 if (nfserr) 2429 goto err_no_verf; 2430 2431 if (readdir->offset) 2432 xdr_encode_hyper(readdir->offset, offset); 2433 2434 p = readdir->buffer; 2435 *p++ = 0; /* no more entries */ 2436 *p++ = htonl(readdir->common.err == nfserr_eof); 2437 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2438 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2439 2440 /* Use rest of head for padding and remaining ops: */ 2441 resp->xbuf->tail[0].iov_base = tailbase; 2442 resp->xbuf->tail[0].iov_len = 0; 2443 resp->p = resp->xbuf->tail[0].iov_base; 2444 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2445 2446 return 0; 2447 err_no_verf: 2448 p = savep; 2449 ADJUST_ARGS(); 2450 return nfserr; 2451 } 2452 2453 static void 2454 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2455 { 2456 ENCODE_HEAD; 2457 2458 if (!nfserr) { 2459 RESERVE_SPACE(20); 2460 WRITECINFO(remove->rm_cinfo); 2461 ADJUST_ARGS(); 2462 } 2463 } 2464 2465 static void 2466 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2467 { 2468 ENCODE_HEAD; 2469 2470 if (!nfserr) { 2471 RESERVE_SPACE(40); 2472 WRITECINFO(rename->rn_sinfo); 2473 WRITECINFO(rename->rn_tinfo); 2474 ADJUST_ARGS(); 2475 } 2476 } 2477 2478 static void 2479 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2480 struct nfsd4_secinfo *secinfo) 2481 { 2482 int i = 0; 2483 struct svc_export *exp = secinfo->si_exp; 2484 u32 nflavs; 2485 struct exp_flavor_info *flavs; 2486 struct exp_flavor_info def_flavs[2]; 2487 ENCODE_HEAD; 2488 2489 if (nfserr) 2490 goto out; 2491 if (exp->ex_nflavors) { 2492 flavs = exp->ex_flavors; 2493 nflavs = exp->ex_nflavors; 2494 } else { /* Handling of some defaults in absence of real secinfo: */ 2495 flavs = def_flavs; 2496 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2497 nflavs = 2; 2498 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2499 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2500 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2501 nflavs = 1; 2502 flavs[0].pseudoflavor 2503 = svcauth_gss_flavor(exp->ex_client); 2504 } else { 2505 nflavs = 1; 2506 flavs[0].pseudoflavor 2507 = exp->ex_client->flavour->flavour; 2508 } 2509 } 2510 2511 RESERVE_SPACE(4); 2512 WRITE32(nflavs); 2513 ADJUST_ARGS(); 2514 for (i = 0; i < nflavs; i++) { 2515 u32 flav = flavs[i].pseudoflavor; 2516 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2517 2518 if (gm) { 2519 RESERVE_SPACE(4); 2520 WRITE32(RPC_AUTH_GSS); 2521 ADJUST_ARGS(); 2522 RESERVE_SPACE(4 + gm->gm_oid.len); 2523 WRITE32(gm->gm_oid.len); 2524 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2525 ADJUST_ARGS(); 2526 RESERVE_SPACE(4); 2527 WRITE32(0); /* qop */ 2528 ADJUST_ARGS(); 2529 RESERVE_SPACE(4); 2530 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2531 ADJUST_ARGS(); 2532 gss_mech_put(gm); 2533 } else { 2534 RESERVE_SPACE(4); 2535 WRITE32(flav); 2536 ADJUST_ARGS(); 2537 } 2538 } 2539 out: 2540 if (exp) 2541 exp_put(exp); 2542 } 2543 2544 /* 2545 * The SETATTR encode routine is special -- it always encodes a bitmap, 2546 * regardless of the error status. 2547 */ 2548 static void 2549 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2550 { 2551 ENCODE_HEAD; 2552 2553 RESERVE_SPACE(12); 2554 if (nfserr) { 2555 WRITE32(2); 2556 WRITE32(0); 2557 WRITE32(0); 2558 } 2559 else { 2560 WRITE32(2); 2561 WRITE32(setattr->sa_bmval[0]); 2562 WRITE32(setattr->sa_bmval[1]); 2563 } 2564 ADJUST_ARGS(); 2565 } 2566 2567 static void 2568 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2569 { 2570 ENCODE_HEAD; 2571 2572 if (!nfserr) { 2573 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2574 WRITEMEM(&scd->se_clientid, 8); 2575 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2576 ADJUST_ARGS(); 2577 } 2578 else if (nfserr == nfserr_clid_inuse) { 2579 RESERVE_SPACE(8); 2580 WRITE32(0); 2581 WRITE32(0); 2582 ADJUST_ARGS(); 2583 } 2584 } 2585 2586 static void 2587 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2588 { 2589 ENCODE_HEAD; 2590 2591 if (!nfserr) { 2592 RESERVE_SPACE(16); 2593 WRITE32(write->wr_bytes_written); 2594 WRITE32(write->wr_how_written); 2595 WRITEMEM(write->wr_verifier.data, 8); 2596 ADJUST_ARGS(); 2597 } 2598 } 2599 2600 void 2601 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2602 { 2603 __be32 *statp; 2604 ENCODE_HEAD; 2605 2606 RESERVE_SPACE(8); 2607 WRITE32(op->opnum); 2608 statp = p++; /* to be backfilled at the end */ 2609 ADJUST_ARGS(); 2610 2611 switch (op->opnum) { 2612 case OP_ACCESS: 2613 nfsd4_encode_access(resp, op->status, &op->u.access); 2614 break; 2615 case OP_CLOSE: 2616 nfsd4_encode_close(resp, op->status, &op->u.close); 2617 break; 2618 case OP_COMMIT: 2619 nfsd4_encode_commit(resp, op->status, &op->u.commit); 2620 break; 2621 case OP_CREATE: 2622 nfsd4_encode_create(resp, op->status, &op->u.create); 2623 break; 2624 case OP_DELEGRETURN: 2625 break; 2626 case OP_GETATTR: 2627 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); 2628 break; 2629 case OP_GETFH: 2630 nfsd4_encode_getfh(resp, op->status, op->u.getfh); 2631 break; 2632 case OP_LINK: 2633 nfsd4_encode_link(resp, op->status, &op->u.link); 2634 break; 2635 case OP_LOCK: 2636 nfsd4_encode_lock(resp, op->status, &op->u.lock); 2637 break; 2638 case OP_LOCKT: 2639 nfsd4_encode_lockt(resp, op->status, &op->u.lockt); 2640 break; 2641 case OP_LOCKU: 2642 nfsd4_encode_locku(resp, op->status, &op->u.locku); 2643 break; 2644 case OP_LOOKUP: 2645 break; 2646 case OP_LOOKUPP: 2647 break; 2648 case OP_NVERIFY: 2649 break; 2650 case OP_OPEN: 2651 nfsd4_encode_open(resp, op->status, &op->u.open); 2652 break; 2653 case OP_OPEN_CONFIRM: 2654 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); 2655 break; 2656 case OP_OPEN_DOWNGRADE: 2657 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); 2658 break; 2659 case OP_PUTFH: 2660 break; 2661 case OP_PUTROOTFH: 2662 break; 2663 case OP_READ: 2664 op->status = nfsd4_encode_read(resp, op->status, &op->u.read); 2665 break; 2666 case OP_READDIR: 2667 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); 2668 break; 2669 case OP_READLINK: 2670 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); 2671 break; 2672 case OP_REMOVE: 2673 nfsd4_encode_remove(resp, op->status, &op->u.remove); 2674 break; 2675 case OP_RENAME: 2676 nfsd4_encode_rename(resp, op->status, &op->u.rename); 2677 break; 2678 case OP_RENEW: 2679 break; 2680 case OP_RESTOREFH: 2681 break; 2682 case OP_SAVEFH: 2683 break; 2684 case OP_SECINFO: 2685 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo); 2686 break; 2687 case OP_SETATTR: 2688 nfsd4_encode_setattr(resp, op->status, &op->u.setattr); 2689 break; 2690 case OP_SETCLIENTID: 2691 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); 2692 break; 2693 case OP_SETCLIENTID_CONFIRM: 2694 break; 2695 case OP_VERIFY: 2696 break; 2697 case OP_WRITE: 2698 nfsd4_encode_write(resp, op->status, &op->u.write); 2699 break; 2700 case OP_RELEASE_LOCKOWNER: 2701 break; 2702 default: 2703 break; 2704 } 2705 2706 /* 2707 * Note: We write the status directly, instead of using WRITE32(), 2708 * since it is already in network byte order. 2709 */ 2710 *statp = op->status; 2711 } 2712 2713 /* 2714 * Encode the reply stored in the stateowner reply cache 2715 * 2716 * XDR note: do not encode rp->rp_buflen: the buffer contains the 2717 * previously sent already encoded operation. 2718 * 2719 * called with nfs4_lock_state() held 2720 */ 2721 void 2722 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 2723 { 2724 ENCODE_HEAD; 2725 struct nfs4_replay *rp = op->replay; 2726 2727 BUG_ON(!rp); 2728 2729 RESERVE_SPACE(8); 2730 WRITE32(op->opnum); 2731 *p++ = rp->rp_status; /* already xdr'ed */ 2732 ADJUST_ARGS(); 2733 2734 RESERVE_SPACE(rp->rp_buflen); 2735 WRITEMEM(rp->rp_buf, rp->rp_buflen); 2736 ADJUST_ARGS(); 2737 } 2738 2739 /* 2740 * END OF "GENERIC" ENCODE ROUTINES. 2741 */ 2742 2743 int 2744 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 2745 { 2746 return xdr_ressize_check(rqstp, p); 2747 } 2748 2749 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 2750 { 2751 if (args->ops != args->iops) { 2752 kfree(args->ops); 2753 args->ops = args->iops; 2754 } 2755 kfree(args->tmpp); 2756 args->tmpp = NULL; 2757 while (args->to_free) { 2758 struct tmpbuf *tb = args->to_free; 2759 args->to_free = tb->next; 2760 tb->release(tb->buf); 2761 kfree(tb); 2762 } 2763 } 2764 2765 int 2766 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 2767 { 2768 __be32 status; 2769 2770 args->p = p; 2771 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 2772 args->pagelist = rqstp->rq_arg.pages; 2773 args->pagelen = rqstp->rq_arg.page_len; 2774 args->tmpp = NULL; 2775 args->to_free = NULL; 2776 args->ops = args->iops; 2777 args->rqstp = rqstp; 2778 2779 status = nfsd4_decode_compound(args); 2780 if (status) { 2781 nfsd4_release_compoundargs(args); 2782 } 2783 return !status; 2784 } 2785 2786 int 2787 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 2788 { 2789 /* 2790 * All that remains is to write the tag and operation count... 2791 */ 2792 struct kvec *iov; 2793 p = resp->tagp; 2794 *p++ = htonl(resp->taglen); 2795 memcpy(p, resp->tag, resp->taglen); 2796 p += XDR_QUADLEN(resp->taglen); 2797 *p++ = htonl(resp->opcnt); 2798 2799 if (rqstp->rq_res.page_len) 2800 iov = &rqstp->rq_res.tail[0]; 2801 else 2802 iov = &rqstp->rq_res.head[0]; 2803 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 2804 BUG_ON(iov->iov_len > PAGE_SIZE); 2805 return 1; 2806 } 2807 2808 /* 2809 * Local variables: 2810 * c-basic-offset: 8 2811 * End: 2812 */ 2813