1 /* 2 * Server-side XDR for NFSv4 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * TODO: Neil Brown made the following observation: We currently 36 * initially reserve NFSD_BUFSIZE space on the transmit queue and 37 * never release any of that until the request is complete. 38 * It would be good to calculate a new maximum response size while 39 * decoding the COMPOUND, and call svc_reserve with this number 40 * at the end of nfs4svc_decode_compoundargs. 41 */ 42 43 #include <linux/param.h> 44 #include <linux/smp.h> 45 #include <linux/fs.h> 46 #include <linux/namei.h> 47 #include <linux/vfs.h> 48 #include <linux/utsname.h> 49 #include <linux/sunrpc/xdr.h> 50 #include <linux/sunrpc/svc.h> 51 #include <linux/sunrpc/clnt.h> 52 #include <linux/nfsd/nfsd.h> 53 #include <linux/nfsd/state.h> 54 #include <linux/nfsd/xdr4.h> 55 #include <linux/nfsd_idmap.h> 56 #include <linux/nfs4.h> 57 #include <linux/nfs4_acl.h> 58 #include <linux/sunrpc/gss_api.h> 59 #include <linux/sunrpc/svcauth_gss.h> 60 61 #define NFSDDBG_FACILITY NFSDDBG_XDR 62 63 /* 64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 65 * directory in order to indicate to the client that a filesystem boundary is present 66 * We use a fixed fsid for a referral 67 */ 68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 70 71 static __be32 72 check_filename(char *str, int len, __be32 err) 73 { 74 int i; 75 76 if (len == 0) 77 return nfserr_inval; 78 if (isdotent(str, len)) 79 return err; 80 for (i = 0; i < len; i++) 81 if (str[i] == '/') 82 return err; 83 return 0; 84 } 85 86 #define DECODE_HEAD \ 87 __be32 *p; \ 88 __be32 status 89 #define DECODE_TAIL \ 90 status = 0; \ 91 out: \ 92 return status; \ 93 xdr_error: \ 94 dprintk("NFSD: xdr error (%s:%d)\n", \ 95 __FILE__, __LINE__); \ 96 status = nfserr_bad_xdr; \ 97 goto out 98 99 #define READ32(x) (x) = ntohl(*p++) 100 #define READ64(x) do { \ 101 (x) = (u64)ntohl(*p++) << 32; \ 102 (x) |= ntohl(*p++); \ 103 } while (0) 104 #define READTIME(x) do { \ 105 p++; \ 106 (x) = ntohl(*p++); \ 107 p++; \ 108 } while (0) 109 #define READMEM(x,nbytes) do { \ 110 x = (char *)p; \ 111 p += XDR_QUADLEN(nbytes); \ 112 } while (0) 113 #define SAVEMEM(x,nbytes) do { \ 114 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 115 savemem(argp, p, nbytes) : \ 116 (char *)p)) { \ 117 dprintk("NFSD: xdr error (%s:%d)\n", \ 118 __FILE__, __LINE__); \ 119 goto xdr_error; \ 120 } \ 121 p += XDR_QUADLEN(nbytes); \ 122 } while (0) 123 #define COPYMEM(x,nbytes) do { \ 124 memcpy((x), p, nbytes); \ 125 p += XDR_QUADLEN(nbytes); \ 126 } while (0) 127 128 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 129 #define READ_BUF(nbytes) do { \ 130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 131 p = argp->p; \ 132 argp->p += XDR_QUADLEN(nbytes); \ 133 } else if (!(p = read_buf(argp, nbytes))) { \ 134 dprintk("NFSD: xdr error (%s:%d)\n", \ 135 __FILE__, __LINE__); \ 136 goto xdr_error; \ 137 } \ 138 } while (0) 139 140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 141 { 142 /* We want more bytes than seem to be available. 143 * Maybe we need a new page, maybe we have just run out 144 */ 145 unsigned int avail = (char *)argp->end - (char *)argp->p; 146 __be32 *p; 147 if (avail + argp->pagelen < nbytes) 148 return NULL; 149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 150 return NULL; 151 /* ok, we can do it with the current plus the next page */ 152 if (nbytes <= sizeof(argp->tmp)) 153 p = argp->tmp; 154 else { 155 kfree(argp->tmpp); 156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 157 if (!p) 158 return NULL; 159 160 } 161 /* 162 * The following memcpy is safe because read_buf is always 163 * called with nbytes > avail, and the two cases above both 164 * guarantee p points to at least nbytes bytes. 165 */ 166 memcpy(p, argp->p, avail); 167 /* step to next page */ 168 argp->p = page_address(argp->pagelist[0]); 169 argp->pagelist++; 170 if (argp->pagelen < PAGE_SIZE) { 171 argp->end = p + (argp->pagelen>>2); 172 argp->pagelen = 0; 173 } else { 174 argp->end = p + (PAGE_SIZE>>2); 175 argp->pagelen -= PAGE_SIZE; 176 } 177 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 178 argp->p += XDR_QUADLEN(nbytes - avail); 179 return p; 180 } 181 182 static int zero_clientid(clientid_t *clid) 183 { 184 return (clid->cl_boot == 0) && (clid->cl_id == 0); 185 } 186 187 static int 188 defer_free(struct nfsd4_compoundargs *argp, 189 void (*release)(const void *), void *p) 190 { 191 struct tmpbuf *tb; 192 193 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 194 if (!tb) 195 return -ENOMEM; 196 tb->buf = p; 197 tb->release = release; 198 tb->next = argp->to_free; 199 argp->to_free = tb; 200 return 0; 201 } 202 203 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 204 { 205 if (p == argp->tmp) { 206 p = kmalloc(nbytes, GFP_KERNEL); 207 if (!p) 208 return NULL; 209 memcpy(p, argp->tmp, nbytes); 210 } else { 211 BUG_ON(p != argp->tmpp); 212 argp->tmpp = NULL; 213 } 214 if (defer_free(argp, kfree, p)) { 215 kfree(p); 216 return NULL; 217 } else 218 return (char *)p; 219 } 220 221 static __be32 222 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 223 { 224 u32 bmlen; 225 DECODE_HEAD; 226 227 bmval[0] = 0; 228 bmval[1] = 0; 229 bmval[2] = 0; 230 231 READ_BUF(4); 232 READ32(bmlen); 233 if (bmlen > 1000) 234 goto xdr_error; 235 236 READ_BUF(bmlen << 2); 237 if (bmlen > 0) 238 READ32(bmval[0]); 239 if (bmlen > 1) 240 READ32(bmval[1]); 241 if (bmlen > 2) 242 READ32(bmval[2]); 243 244 DECODE_TAIL; 245 } 246 247 static __be32 248 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 249 struct iattr *iattr, struct nfs4_acl **acl) 250 { 251 int expected_len, len = 0; 252 u32 dummy32; 253 char *buf; 254 int host_err; 255 256 DECODE_HEAD; 257 iattr->ia_valid = 0; 258 if ((status = nfsd4_decode_bitmap(argp, bmval))) 259 return status; 260 261 READ_BUF(4); 262 READ32(expected_len); 263 264 if (bmval[0] & FATTR4_WORD0_SIZE) { 265 READ_BUF(8); 266 len += 8; 267 READ64(iattr->ia_size); 268 iattr->ia_valid |= ATTR_SIZE; 269 } 270 if (bmval[0] & FATTR4_WORD0_ACL) { 271 int nace; 272 struct nfs4_ace *ace; 273 274 READ_BUF(4); len += 4; 275 READ32(nace); 276 277 if (nace > NFS4_ACL_MAX) 278 return nfserr_resource; 279 280 *acl = nfs4_acl_new(nace); 281 if (*acl == NULL) { 282 host_err = -ENOMEM; 283 goto out_nfserr; 284 } 285 defer_free(argp, kfree, *acl); 286 287 (*acl)->naces = nace; 288 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 289 READ_BUF(16); len += 16; 290 READ32(ace->type); 291 READ32(ace->flag); 292 READ32(ace->access_mask); 293 READ32(dummy32); 294 READ_BUF(dummy32); 295 len += XDR_QUADLEN(dummy32) << 2; 296 READMEM(buf, dummy32); 297 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 298 host_err = 0; 299 if (ace->whotype != NFS4_ACL_WHO_NAMED) 300 ace->who = 0; 301 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 302 host_err = nfsd_map_name_to_gid(argp->rqstp, 303 buf, dummy32, &ace->who); 304 else 305 host_err = nfsd_map_name_to_uid(argp->rqstp, 306 buf, dummy32, &ace->who); 307 if (host_err) 308 goto out_nfserr; 309 } 310 } else 311 *acl = NULL; 312 if (bmval[1] & FATTR4_WORD1_MODE) { 313 READ_BUF(4); 314 len += 4; 315 READ32(iattr->ia_mode); 316 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 317 iattr->ia_valid |= ATTR_MODE; 318 } 319 if (bmval[1] & FATTR4_WORD1_OWNER) { 320 READ_BUF(4); 321 len += 4; 322 READ32(dummy32); 323 READ_BUF(dummy32); 324 len += (XDR_QUADLEN(dummy32) << 2); 325 READMEM(buf, dummy32); 326 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 327 goto out_nfserr; 328 iattr->ia_valid |= ATTR_UID; 329 } 330 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 331 READ_BUF(4); 332 len += 4; 333 READ32(dummy32); 334 READ_BUF(dummy32); 335 len += (XDR_QUADLEN(dummy32) << 2); 336 READMEM(buf, dummy32); 337 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 338 goto out_nfserr; 339 iattr->ia_valid |= ATTR_GID; 340 } 341 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 342 READ_BUF(4); 343 len += 4; 344 READ32(dummy32); 345 switch (dummy32) { 346 case NFS4_SET_TO_CLIENT_TIME: 347 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 348 all 32 bits of 'nseconds'. */ 349 READ_BUF(12); 350 len += 12; 351 READ32(dummy32); 352 if (dummy32) 353 return nfserr_inval; 354 READ32(iattr->ia_atime.tv_sec); 355 READ32(iattr->ia_atime.tv_nsec); 356 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 357 return nfserr_inval; 358 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 359 break; 360 case NFS4_SET_TO_SERVER_TIME: 361 iattr->ia_valid |= ATTR_ATIME; 362 break; 363 default: 364 goto xdr_error; 365 } 366 } 367 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 368 READ_BUF(4); 369 len += 4; 370 READ32(dummy32); 371 switch (dummy32) { 372 case NFS4_SET_TO_CLIENT_TIME: 373 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 374 all 32 bits of 'nseconds'. */ 375 READ_BUF(12); 376 len += 12; 377 READ32(dummy32); 378 if (dummy32) 379 return nfserr_inval; 380 READ32(iattr->ia_mtime.tv_sec); 381 READ32(iattr->ia_mtime.tv_nsec); 382 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 383 return nfserr_inval; 384 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 385 break; 386 case NFS4_SET_TO_SERVER_TIME: 387 iattr->ia_valid |= ATTR_MTIME; 388 break; 389 default: 390 goto xdr_error; 391 } 392 } 393 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 394 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 395 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 396 READ_BUF(expected_len - len); 397 else if (len != expected_len) 398 goto xdr_error; 399 400 DECODE_TAIL; 401 402 out_nfserr: 403 status = nfserrno(host_err); 404 goto out; 405 } 406 407 static __be32 408 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 409 { 410 DECODE_HEAD; 411 412 READ_BUF(sizeof(stateid_t)); 413 READ32(sid->si_generation); 414 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 415 416 DECODE_TAIL; 417 } 418 419 static __be32 420 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 421 { 422 DECODE_HEAD; 423 424 READ_BUF(4); 425 READ32(access->ac_req_access); 426 427 DECODE_TAIL; 428 } 429 430 static __be32 431 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 432 { 433 DECODE_HEAD; 434 435 close->cl_stateowner = NULL; 436 READ_BUF(4); 437 READ32(close->cl_seqid); 438 return nfsd4_decode_stateid(argp, &close->cl_stateid); 439 440 DECODE_TAIL; 441 } 442 443 444 static __be32 445 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 446 { 447 DECODE_HEAD; 448 449 READ_BUF(12); 450 READ64(commit->co_offset); 451 READ32(commit->co_count); 452 453 DECODE_TAIL; 454 } 455 456 static __be32 457 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 458 { 459 DECODE_HEAD; 460 461 READ_BUF(4); 462 READ32(create->cr_type); 463 switch (create->cr_type) { 464 case NF4LNK: 465 READ_BUF(4); 466 READ32(create->cr_linklen); 467 READ_BUF(create->cr_linklen); 468 SAVEMEM(create->cr_linkname, create->cr_linklen); 469 break; 470 case NF4BLK: 471 case NF4CHR: 472 READ_BUF(8); 473 READ32(create->cr_specdata1); 474 READ32(create->cr_specdata2); 475 break; 476 case NF4SOCK: 477 case NF4FIFO: 478 case NF4DIR: 479 default: 480 break; 481 } 482 483 READ_BUF(4); 484 READ32(create->cr_namelen); 485 READ_BUF(create->cr_namelen); 486 SAVEMEM(create->cr_name, create->cr_namelen); 487 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 488 return status; 489 490 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 491 &create->cr_acl); 492 if (status) 493 goto out; 494 495 DECODE_TAIL; 496 } 497 498 static inline __be32 499 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 500 { 501 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 502 } 503 504 static inline __be32 505 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 506 { 507 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 508 } 509 510 static __be32 511 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 512 { 513 DECODE_HEAD; 514 515 READ_BUF(4); 516 READ32(link->li_namelen); 517 READ_BUF(link->li_namelen); 518 SAVEMEM(link->li_name, link->li_namelen); 519 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 520 return status; 521 522 DECODE_TAIL; 523 } 524 525 static __be32 526 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 527 { 528 DECODE_HEAD; 529 530 lock->lk_replay_owner = NULL; 531 /* 532 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 533 */ 534 READ_BUF(28); 535 READ32(lock->lk_type); 536 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 537 goto xdr_error; 538 READ32(lock->lk_reclaim); 539 READ64(lock->lk_offset); 540 READ64(lock->lk_length); 541 READ32(lock->lk_is_new); 542 543 if (lock->lk_is_new) { 544 READ_BUF(4); 545 READ32(lock->lk_new_open_seqid); 546 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 547 if (status) 548 return status; 549 READ_BUF(8 + sizeof(clientid_t)); 550 READ32(lock->lk_new_lock_seqid); 551 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 552 READ32(lock->lk_new_owner.len); 553 READ_BUF(lock->lk_new_owner.len); 554 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 555 } else { 556 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 557 if (status) 558 return status; 559 READ_BUF(4); 560 READ32(lock->lk_old_lock_seqid); 561 } 562 563 DECODE_TAIL; 564 } 565 566 static __be32 567 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 568 { 569 DECODE_HEAD; 570 571 READ_BUF(32); 572 READ32(lockt->lt_type); 573 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 574 goto xdr_error; 575 READ64(lockt->lt_offset); 576 READ64(lockt->lt_length); 577 COPYMEM(&lockt->lt_clientid, 8); 578 READ32(lockt->lt_owner.len); 579 READ_BUF(lockt->lt_owner.len); 580 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 581 582 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid)) 583 return nfserr_inval; 584 DECODE_TAIL; 585 } 586 587 static __be32 588 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 589 { 590 DECODE_HEAD; 591 592 locku->lu_stateowner = NULL; 593 READ_BUF(8); 594 READ32(locku->lu_type); 595 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 596 goto xdr_error; 597 READ32(locku->lu_seqid); 598 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 599 if (status) 600 return status; 601 READ_BUF(16); 602 READ64(locku->lu_offset); 603 READ64(locku->lu_length); 604 605 DECODE_TAIL; 606 } 607 608 static __be32 609 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 610 { 611 DECODE_HEAD; 612 613 READ_BUF(4); 614 READ32(lookup->lo_len); 615 READ_BUF(lookup->lo_len); 616 SAVEMEM(lookup->lo_name, lookup->lo_len); 617 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 618 return status; 619 620 DECODE_TAIL; 621 } 622 623 static __be32 624 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 625 { 626 DECODE_HEAD; 627 628 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 629 open->op_iattr.ia_valid = 0; 630 open->op_stateowner = NULL; 631 632 /* seqid, share_access, share_deny, clientid, ownerlen */ 633 READ_BUF(16 + sizeof(clientid_t)); 634 READ32(open->op_seqid); 635 READ32(open->op_share_access); 636 READ32(open->op_share_deny); 637 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 638 READ32(open->op_owner.len); 639 640 /* owner, open_flag */ 641 READ_BUF(open->op_owner.len + 4); 642 SAVEMEM(open->op_owner.data, open->op_owner.len); 643 READ32(open->op_create); 644 switch (open->op_create) { 645 case NFS4_OPEN_NOCREATE: 646 break; 647 case NFS4_OPEN_CREATE: 648 READ_BUF(4); 649 READ32(open->op_createmode); 650 switch (open->op_createmode) { 651 case NFS4_CREATE_UNCHECKED: 652 case NFS4_CREATE_GUARDED: 653 status = nfsd4_decode_fattr(argp, open->op_bmval, 654 &open->op_iattr, &open->op_acl); 655 if (status) 656 goto out; 657 break; 658 case NFS4_CREATE_EXCLUSIVE: 659 READ_BUF(8); 660 COPYMEM(open->op_verf.data, 8); 661 break; 662 case NFS4_CREATE_EXCLUSIVE4_1: 663 if (argp->minorversion < 1) 664 goto xdr_error; 665 READ_BUF(8); 666 COPYMEM(open->op_verf.data, 8); 667 status = nfsd4_decode_fattr(argp, open->op_bmval, 668 &open->op_iattr, &open->op_acl); 669 if (status) 670 goto out; 671 break; 672 default: 673 goto xdr_error; 674 } 675 break; 676 default: 677 goto xdr_error; 678 } 679 680 /* open_claim */ 681 READ_BUF(4); 682 READ32(open->op_claim_type); 683 switch (open->op_claim_type) { 684 case NFS4_OPEN_CLAIM_NULL: 685 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 686 READ_BUF(4); 687 READ32(open->op_fname.len); 688 READ_BUF(open->op_fname.len); 689 SAVEMEM(open->op_fname.data, open->op_fname.len); 690 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 691 return status; 692 break; 693 case NFS4_OPEN_CLAIM_PREVIOUS: 694 READ_BUF(4); 695 READ32(open->op_delegate_type); 696 break; 697 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 698 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 699 if (status) 700 return status; 701 READ_BUF(4); 702 READ32(open->op_fname.len); 703 READ_BUF(open->op_fname.len); 704 SAVEMEM(open->op_fname.data, open->op_fname.len); 705 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 706 return status; 707 break; 708 default: 709 goto xdr_error; 710 } 711 712 DECODE_TAIL; 713 } 714 715 static __be32 716 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 717 { 718 DECODE_HEAD; 719 720 open_conf->oc_stateowner = NULL; 721 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 722 if (status) 723 return status; 724 READ_BUF(4); 725 READ32(open_conf->oc_seqid); 726 727 DECODE_TAIL; 728 } 729 730 static __be32 731 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 732 { 733 DECODE_HEAD; 734 735 open_down->od_stateowner = NULL; 736 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 737 if (status) 738 return status; 739 READ_BUF(12); 740 READ32(open_down->od_seqid); 741 READ32(open_down->od_share_access); 742 READ32(open_down->od_share_deny); 743 744 DECODE_TAIL; 745 } 746 747 static __be32 748 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 749 { 750 DECODE_HEAD; 751 752 READ_BUF(4); 753 READ32(putfh->pf_fhlen); 754 if (putfh->pf_fhlen > NFS4_FHSIZE) 755 goto xdr_error; 756 READ_BUF(putfh->pf_fhlen); 757 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 758 759 DECODE_TAIL; 760 } 761 762 static __be32 763 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 764 { 765 DECODE_HEAD; 766 767 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 768 if (status) 769 return status; 770 READ_BUF(12); 771 READ64(read->rd_offset); 772 READ32(read->rd_length); 773 774 DECODE_TAIL; 775 } 776 777 static __be32 778 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 779 { 780 DECODE_HEAD; 781 782 READ_BUF(24); 783 READ64(readdir->rd_cookie); 784 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 785 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 786 READ32(readdir->rd_maxcount); 787 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 788 goto out; 789 790 DECODE_TAIL; 791 } 792 793 static __be32 794 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 795 { 796 DECODE_HEAD; 797 798 READ_BUF(4); 799 READ32(remove->rm_namelen); 800 READ_BUF(remove->rm_namelen); 801 SAVEMEM(remove->rm_name, remove->rm_namelen); 802 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 803 return status; 804 805 DECODE_TAIL; 806 } 807 808 static __be32 809 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 810 { 811 DECODE_HEAD; 812 813 READ_BUF(4); 814 READ32(rename->rn_snamelen); 815 READ_BUF(rename->rn_snamelen + 4); 816 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 817 READ32(rename->rn_tnamelen); 818 READ_BUF(rename->rn_tnamelen); 819 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 820 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 821 return status; 822 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 823 return status; 824 825 DECODE_TAIL; 826 } 827 828 static __be32 829 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 830 { 831 DECODE_HEAD; 832 833 READ_BUF(sizeof(clientid_t)); 834 COPYMEM(clientid, sizeof(clientid_t)); 835 836 DECODE_TAIL; 837 } 838 839 static __be32 840 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 841 struct nfsd4_secinfo *secinfo) 842 { 843 DECODE_HEAD; 844 845 READ_BUF(4); 846 READ32(secinfo->si_namelen); 847 READ_BUF(secinfo->si_namelen); 848 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 849 status = check_filename(secinfo->si_name, secinfo->si_namelen, 850 nfserr_noent); 851 if (status) 852 return status; 853 DECODE_TAIL; 854 } 855 856 static __be32 857 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 858 { 859 __be32 status; 860 861 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 862 if (status) 863 return status; 864 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 865 &setattr->sa_acl); 866 } 867 868 static __be32 869 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 870 { 871 DECODE_HEAD; 872 873 READ_BUF(12); 874 COPYMEM(setclientid->se_verf.data, 8); 875 READ32(setclientid->se_namelen); 876 877 READ_BUF(setclientid->se_namelen + 8); 878 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 879 READ32(setclientid->se_callback_prog); 880 READ32(setclientid->se_callback_netid_len); 881 882 READ_BUF(setclientid->se_callback_netid_len + 4); 883 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 884 READ32(setclientid->se_callback_addr_len); 885 886 READ_BUF(setclientid->se_callback_addr_len + 4); 887 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 888 READ32(setclientid->se_callback_ident); 889 890 DECODE_TAIL; 891 } 892 893 static __be32 894 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 895 { 896 DECODE_HEAD; 897 898 READ_BUF(8 + sizeof(nfs4_verifier)); 899 COPYMEM(&scd_c->sc_clientid, 8); 900 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 901 902 DECODE_TAIL; 903 } 904 905 /* Also used for NVERIFY */ 906 static __be32 907 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 908 { 909 #if 0 910 struct nfsd4_compoundargs save = { 911 .p = argp->p, 912 .end = argp->end, 913 .rqstp = argp->rqstp, 914 }; 915 u32 ve_bmval[2]; 916 struct iattr ve_iattr; /* request */ 917 struct nfs4_acl *ve_acl; /* request */ 918 #endif 919 DECODE_HEAD; 920 921 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 922 goto out; 923 924 /* For convenience's sake, we compare raw xdr'd attributes in 925 * nfsd4_proc_verify; however we still decode here just to return 926 * correct error in case of bad xdr. */ 927 #if 0 928 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 929 if (status == nfserr_inval) { 930 status = nfserrno(status); 931 goto out; 932 } 933 #endif 934 READ_BUF(4); 935 READ32(verify->ve_attrlen); 936 READ_BUF(verify->ve_attrlen); 937 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 938 939 DECODE_TAIL; 940 } 941 942 static __be32 943 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 944 { 945 int avail; 946 int v; 947 int len; 948 DECODE_HEAD; 949 950 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 951 if (status) 952 return status; 953 READ_BUF(16); 954 READ64(write->wr_offset); 955 READ32(write->wr_stable_how); 956 if (write->wr_stable_how > 2) 957 goto xdr_error; 958 READ32(write->wr_buflen); 959 960 /* Sorry .. no magic macros for this.. * 961 * READ_BUF(write->wr_buflen); 962 * SAVEMEM(write->wr_buf, write->wr_buflen); 963 */ 964 avail = (char*)argp->end - (char*)argp->p; 965 if (avail + argp->pagelen < write->wr_buflen) { 966 dprintk("NFSD: xdr error (%s:%d)\n", 967 __FILE__, __LINE__); 968 goto xdr_error; 969 } 970 argp->rqstp->rq_vec[0].iov_base = p; 971 argp->rqstp->rq_vec[0].iov_len = avail; 972 v = 0; 973 len = write->wr_buflen; 974 while (len > argp->rqstp->rq_vec[v].iov_len) { 975 len -= argp->rqstp->rq_vec[v].iov_len; 976 v++; 977 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 978 argp->pagelist++; 979 if (argp->pagelen >= PAGE_SIZE) { 980 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 981 argp->pagelen -= PAGE_SIZE; 982 } else { 983 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 984 argp->pagelen -= len; 985 } 986 } 987 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 988 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 989 argp->rqstp->rq_vec[v].iov_len = len; 990 write->wr_vlen = v+1; 991 992 DECODE_TAIL; 993 } 994 995 static __be32 996 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 997 { 998 DECODE_HEAD; 999 1000 READ_BUF(12); 1001 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1002 READ32(rlockowner->rl_owner.len); 1003 READ_BUF(rlockowner->rl_owner.len); 1004 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1005 1006 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1007 return nfserr_inval; 1008 DECODE_TAIL; 1009 } 1010 1011 static __be32 1012 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1013 struct nfsd4_exchange_id *exid) 1014 { 1015 int dummy; 1016 DECODE_HEAD; 1017 1018 READ_BUF(NFS4_VERIFIER_SIZE); 1019 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1020 1021 READ_BUF(4); 1022 READ32(exid->clname.len); 1023 1024 READ_BUF(exid->clname.len); 1025 SAVEMEM(exid->clname.data, exid->clname.len); 1026 1027 READ_BUF(4); 1028 READ32(exid->flags); 1029 1030 /* Ignore state_protect4_a */ 1031 READ_BUF(4); 1032 READ32(exid->spa_how); 1033 switch (exid->spa_how) { 1034 case SP4_NONE: 1035 break; 1036 case SP4_MACH_CRED: 1037 /* spo_must_enforce */ 1038 READ_BUF(4); 1039 READ32(dummy); 1040 READ_BUF(dummy * 4); 1041 p += dummy; 1042 1043 /* spo_must_allow */ 1044 READ_BUF(4); 1045 READ32(dummy); 1046 READ_BUF(dummy * 4); 1047 p += dummy; 1048 break; 1049 case SP4_SSV: 1050 /* ssp_ops */ 1051 READ_BUF(4); 1052 READ32(dummy); 1053 READ_BUF(dummy * 4); 1054 p += dummy; 1055 1056 READ_BUF(4); 1057 READ32(dummy); 1058 READ_BUF(dummy * 4); 1059 p += dummy; 1060 1061 /* ssp_hash_algs<> */ 1062 READ_BUF(4); 1063 READ32(dummy); 1064 READ_BUF(dummy); 1065 p += XDR_QUADLEN(dummy); 1066 1067 /* ssp_encr_algs<> */ 1068 READ_BUF(4); 1069 READ32(dummy); 1070 READ_BUF(dummy); 1071 p += XDR_QUADLEN(dummy); 1072 1073 /* ssp_window and ssp_num_gss_handles */ 1074 READ_BUF(8); 1075 READ32(dummy); 1076 READ32(dummy); 1077 break; 1078 default: 1079 goto xdr_error; 1080 } 1081 1082 /* Ignore Implementation ID */ 1083 READ_BUF(4); /* nfs_impl_id4 array length */ 1084 READ32(dummy); 1085 1086 if (dummy > 1) 1087 goto xdr_error; 1088 1089 if (dummy == 1) { 1090 /* nii_domain */ 1091 READ_BUF(4); 1092 READ32(dummy); 1093 READ_BUF(dummy); 1094 p += XDR_QUADLEN(dummy); 1095 1096 /* nii_name */ 1097 READ_BUF(4); 1098 READ32(dummy); 1099 READ_BUF(dummy); 1100 p += XDR_QUADLEN(dummy); 1101 1102 /* nii_date */ 1103 READ_BUF(12); 1104 p += 3; 1105 } 1106 DECODE_TAIL; 1107 } 1108 1109 static __be32 1110 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1111 struct nfsd4_create_session *sess) 1112 { 1113 DECODE_HEAD; 1114 1115 u32 dummy; 1116 char *machine_name; 1117 int i; 1118 int nr_secflavs; 1119 1120 READ_BUF(16); 1121 COPYMEM(&sess->clientid, 8); 1122 READ32(sess->seqid); 1123 READ32(sess->flags); 1124 1125 /* Fore channel attrs */ 1126 READ_BUF(28); 1127 READ32(dummy); /* headerpadsz is always 0 */ 1128 READ32(sess->fore_channel.maxreq_sz); 1129 READ32(sess->fore_channel.maxresp_sz); 1130 READ32(sess->fore_channel.maxresp_cached); 1131 READ32(sess->fore_channel.maxops); 1132 READ32(sess->fore_channel.maxreqs); 1133 READ32(sess->fore_channel.nr_rdma_attrs); 1134 if (sess->fore_channel.nr_rdma_attrs == 1) { 1135 READ_BUF(4); 1136 READ32(sess->fore_channel.rdma_attrs); 1137 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1138 dprintk("Too many fore channel attr bitmaps!\n"); 1139 goto xdr_error; 1140 } 1141 1142 /* Back channel attrs */ 1143 READ_BUF(28); 1144 READ32(dummy); /* headerpadsz is always 0 */ 1145 READ32(sess->back_channel.maxreq_sz); 1146 READ32(sess->back_channel.maxresp_sz); 1147 READ32(sess->back_channel.maxresp_cached); 1148 READ32(sess->back_channel.maxops); 1149 READ32(sess->back_channel.maxreqs); 1150 READ32(sess->back_channel.nr_rdma_attrs); 1151 if (sess->back_channel.nr_rdma_attrs == 1) { 1152 READ_BUF(4); 1153 READ32(sess->back_channel.rdma_attrs); 1154 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1155 dprintk("Too many back channel attr bitmaps!\n"); 1156 goto xdr_error; 1157 } 1158 1159 READ_BUF(8); 1160 READ32(sess->callback_prog); 1161 1162 /* callback_sec_params4 */ 1163 READ32(nr_secflavs); 1164 for (i = 0; i < nr_secflavs; ++i) { 1165 READ_BUF(4); 1166 READ32(dummy); 1167 switch (dummy) { 1168 case RPC_AUTH_NULL: 1169 /* Nothing to read */ 1170 break; 1171 case RPC_AUTH_UNIX: 1172 READ_BUF(8); 1173 /* stamp */ 1174 READ32(dummy); 1175 1176 /* machine name */ 1177 READ32(dummy); 1178 READ_BUF(dummy); 1179 SAVEMEM(machine_name, dummy); 1180 1181 /* uid, gid */ 1182 READ_BUF(8); 1183 READ32(sess->uid); 1184 READ32(sess->gid); 1185 1186 /* more gids */ 1187 READ_BUF(4); 1188 READ32(dummy); 1189 READ_BUF(dummy * 4); 1190 for (i = 0; i < dummy; ++i) 1191 READ32(dummy); 1192 break; 1193 case RPC_AUTH_GSS: 1194 dprintk("RPC_AUTH_GSS callback secflavor " 1195 "not supported!\n"); 1196 READ_BUF(8); 1197 /* gcbp_service */ 1198 READ32(dummy); 1199 /* gcbp_handle_from_server */ 1200 READ32(dummy); 1201 READ_BUF(dummy); 1202 p += XDR_QUADLEN(dummy); 1203 /* gcbp_handle_from_client */ 1204 READ_BUF(4); 1205 READ32(dummy); 1206 READ_BUF(dummy); 1207 p += XDR_QUADLEN(dummy); 1208 break; 1209 default: 1210 dprintk("Illegal callback secflavor\n"); 1211 return nfserr_inval; 1212 } 1213 } 1214 DECODE_TAIL; 1215 } 1216 1217 static __be32 1218 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1219 struct nfsd4_destroy_session *destroy_session) 1220 { 1221 DECODE_HEAD; 1222 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1223 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1224 1225 DECODE_TAIL; 1226 } 1227 1228 static __be32 1229 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1230 struct nfsd4_sequence *seq) 1231 { 1232 DECODE_HEAD; 1233 1234 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1235 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1236 READ32(seq->seqid); 1237 READ32(seq->slotid); 1238 READ32(seq->maxslots); 1239 READ32(seq->cachethis); 1240 1241 DECODE_TAIL; 1242 } 1243 1244 static __be32 1245 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1246 { 1247 return nfs_ok; 1248 } 1249 1250 static __be32 1251 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1252 { 1253 return nfserr_notsupp; 1254 } 1255 1256 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1257 1258 static nfsd4_dec nfsd4_dec_ops[] = { 1259 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1260 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1261 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1262 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1263 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1264 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1265 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1266 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1267 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1268 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1269 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1270 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1271 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1272 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1273 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1274 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1275 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1276 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1277 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1278 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1279 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1280 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1281 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1282 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1283 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1284 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1285 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1286 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1287 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1288 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1289 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1290 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1291 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1292 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1293 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1294 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1295 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1296 }; 1297 1298 static nfsd4_dec nfsd41_dec_ops[] = { 1299 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1300 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1301 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1302 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1303 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1304 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1305 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1306 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1307 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1308 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1309 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1310 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1311 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1312 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1313 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1314 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1315 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1316 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1317 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1318 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1319 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1320 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1321 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1322 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1323 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1324 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1325 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1326 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1327 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1328 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1329 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1330 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1331 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1332 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1333 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1334 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1335 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1336 1337 /* new operations for NFSv4.1 */ 1338 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1339 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp, 1340 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1341 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1342 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1343 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1344 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1345 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1346 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1347 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1348 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1349 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1350 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1351 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1352 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1353 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1354 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1355 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1356 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp, 1357 }; 1358 1359 struct nfsd4_minorversion_ops { 1360 nfsd4_dec *decoders; 1361 int nops; 1362 }; 1363 1364 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1365 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1366 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1367 }; 1368 1369 static __be32 1370 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1371 { 1372 DECODE_HEAD; 1373 struct nfsd4_op *op; 1374 struct nfsd4_minorversion_ops *ops; 1375 int i; 1376 1377 /* 1378 * XXX: According to spec, we should check the tag 1379 * for UTF-8 compliance. I'm postponing this for 1380 * now because it seems that some clients do use 1381 * binary tags. 1382 */ 1383 READ_BUF(4); 1384 READ32(argp->taglen); 1385 READ_BUF(argp->taglen + 8); 1386 SAVEMEM(argp->tag, argp->taglen); 1387 READ32(argp->minorversion); 1388 READ32(argp->opcnt); 1389 1390 if (argp->taglen > NFSD4_MAX_TAGLEN) 1391 goto xdr_error; 1392 if (argp->opcnt > 100) 1393 goto xdr_error; 1394 1395 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1396 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1397 if (!argp->ops) { 1398 argp->ops = argp->iops; 1399 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1400 goto xdr_error; 1401 } 1402 } 1403 1404 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1405 argp->opcnt = 0; 1406 1407 ops = &nfsd4_minorversion[argp->minorversion]; 1408 for (i = 0; i < argp->opcnt; i++) { 1409 op = &argp->ops[i]; 1410 op->replay = NULL; 1411 1412 /* 1413 * We can't use READ_BUF() here because we need to handle 1414 * a missing opcode as an OP_WRITE + 1. So we need to check 1415 * to see if we're truly at the end of our buffer or if there 1416 * is another page we need to flip to. 1417 */ 1418 1419 if (argp->p == argp->end) { 1420 if (argp->pagelen < 4) { 1421 /* There isn't an opcode still on the wire */ 1422 op->opnum = OP_WRITE + 1; 1423 op->status = nfserr_bad_xdr; 1424 argp->opcnt = i+1; 1425 break; 1426 } 1427 1428 /* 1429 * False alarm. We just hit a page boundary, but there 1430 * is still data available. Move pointer across page 1431 * boundary. *snip from READ_BUF* 1432 */ 1433 argp->p = page_address(argp->pagelist[0]); 1434 argp->pagelist++; 1435 if (argp->pagelen < PAGE_SIZE) { 1436 argp->end = p + (argp->pagelen>>2); 1437 argp->pagelen = 0; 1438 } else { 1439 argp->end = p + (PAGE_SIZE>>2); 1440 argp->pagelen -= PAGE_SIZE; 1441 } 1442 } 1443 op->opnum = ntohl(*argp->p++); 1444 1445 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops) 1446 op->status = ops->decoders[op->opnum](argp, &op->u); 1447 else { 1448 op->opnum = OP_ILLEGAL; 1449 op->status = nfserr_op_illegal; 1450 } 1451 1452 if (op->status) { 1453 argp->opcnt = i+1; 1454 break; 1455 } 1456 } 1457 1458 DECODE_TAIL; 1459 } 1460 1461 #define WRITE32(n) *p++ = htonl(n) 1462 #define WRITE64(n) do { \ 1463 *p++ = htonl((u32)((n) >> 32)); \ 1464 *p++ = htonl((u32)(n)); \ 1465 } while (0) 1466 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1467 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1468 memcpy(p, ptr, nbytes); \ 1469 p += XDR_QUADLEN(nbytes); \ 1470 }} while (0) 1471 1472 static void write32(__be32 **p, u32 n) 1473 { 1474 *(*p)++ = n; 1475 } 1476 1477 static void write64(__be32 **p, u64 n) 1478 { 1479 write32(p, (u32)(n >> 32)); 1480 write32(p, (u32)n); 1481 } 1482 1483 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1484 { 1485 if (IS_I_VERSION(inode)) { 1486 write64(p, inode->i_version); 1487 } else { 1488 write32(p, stat->ctime.tv_sec); 1489 write32(p, stat->ctime.tv_nsec); 1490 } 1491 } 1492 1493 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1494 { 1495 write32(p, c->atomic); 1496 if (c->change_supported) { 1497 write64(p, c->before_change); 1498 write64(p, c->after_change); 1499 } else { 1500 write32(p, c->before_ctime_sec); 1501 write32(p, c->before_ctime_nsec); 1502 write32(p, c->after_ctime_sec); 1503 write32(p, c->after_ctime_nsec); 1504 } 1505 } 1506 1507 #define RESERVE_SPACE(nbytes) do { \ 1508 p = resp->p; \ 1509 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1510 } while (0) 1511 #define ADJUST_ARGS() resp->p = p 1512 1513 /* 1514 * Header routine to setup seqid operation replay cache 1515 */ 1516 #define ENCODE_SEQID_OP_HEAD \ 1517 __be32 *save; \ 1518 \ 1519 save = resp->p; 1520 1521 /* 1522 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1523 * is where sequence id's are incremented, and the replay cache is filled. 1524 * Note that we increment sequence id's here, at the last moment, so we're sure 1525 * we know whether the error to be returned is a sequence id mutating error. 1526 */ 1527 1528 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1529 if (seqid_mutating_err(nfserr) && stateowner) { \ 1530 stateowner->so_seqid++; \ 1531 stateowner->so_replay.rp_status = nfserr; \ 1532 stateowner->so_replay.rp_buflen = \ 1533 (((char *)(resp)->p - (char *)save)); \ 1534 memcpy(stateowner->so_replay.rp_buf, save, \ 1535 stateowner->so_replay.rp_buflen); \ 1536 } } while (0); 1537 1538 /* Encode as an array of strings the string given with components 1539 * seperated @sep. 1540 */ 1541 static __be32 nfsd4_encode_components(char sep, char *components, 1542 __be32 **pp, int *buflen) 1543 { 1544 __be32 *p = *pp; 1545 __be32 *countp = p; 1546 int strlen, count=0; 1547 char *str, *end; 1548 1549 dprintk("nfsd4_encode_components(%s)\n", components); 1550 if ((*buflen -= 4) < 0) 1551 return nfserr_resource; 1552 WRITE32(0); /* We will fill this in with @count later */ 1553 end = str = components; 1554 while (*end) { 1555 for (; *end && (*end != sep); end++) 1556 ; /* Point to end of component */ 1557 strlen = end - str; 1558 if (strlen) { 1559 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1560 return nfserr_resource; 1561 WRITE32(strlen); 1562 WRITEMEM(str, strlen); 1563 count++; 1564 } 1565 else 1566 end++; 1567 str = end; 1568 } 1569 *pp = p; 1570 p = countp; 1571 WRITE32(count); 1572 return 0; 1573 } 1574 1575 /* 1576 * encode a location element of a fs_locations structure 1577 */ 1578 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1579 __be32 **pp, int *buflen) 1580 { 1581 __be32 status; 1582 __be32 *p = *pp; 1583 1584 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1585 if (status) 1586 return status; 1587 status = nfsd4_encode_components('/', location->path, &p, buflen); 1588 if (status) 1589 return status; 1590 *pp = p; 1591 return 0; 1592 } 1593 1594 /* 1595 * Return the path to an export point in the pseudo filesystem namespace 1596 * Returned string is safe to use as long as the caller holds a reference 1597 * to @exp. 1598 */ 1599 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1600 { 1601 struct svc_fh tmp_fh; 1602 char *path, *rootpath; 1603 1604 fh_init(&tmp_fh, NFS4_FHSIZE); 1605 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1606 if (*stat) 1607 return NULL; 1608 rootpath = tmp_fh.fh_export->ex_pathname; 1609 1610 path = exp->ex_pathname; 1611 1612 if (strncmp(path, rootpath, strlen(rootpath))) { 1613 dprintk("nfsd: fs_locations failed;" 1614 "%s is not contained in %s\n", path, rootpath); 1615 *stat = nfserr_notsupp; 1616 return NULL; 1617 } 1618 1619 return path + strlen(rootpath); 1620 } 1621 1622 /* 1623 * encode a fs_locations structure 1624 */ 1625 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1626 struct svc_export *exp, 1627 __be32 **pp, int *buflen) 1628 { 1629 __be32 status; 1630 int i; 1631 __be32 *p = *pp; 1632 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1633 char *root = nfsd4_path(rqstp, exp, &status); 1634 1635 if (status) 1636 return status; 1637 status = nfsd4_encode_components('/', root, &p, buflen); 1638 if (status) 1639 return status; 1640 if ((*buflen -= 4) < 0) 1641 return nfserr_resource; 1642 WRITE32(fslocs->locations_count); 1643 for (i=0; i<fslocs->locations_count; i++) { 1644 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1645 &p, buflen); 1646 if (status) 1647 return status; 1648 } 1649 *pp = p; 1650 return 0; 1651 } 1652 1653 static u32 nfs4_ftypes[16] = { 1654 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1655 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1656 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1657 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1658 }; 1659 1660 static __be32 1661 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1662 __be32 **p, int *buflen) 1663 { 1664 int status; 1665 1666 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1667 return nfserr_resource; 1668 if (whotype != NFS4_ACL_WHO_NAMED) 1669 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1670 else if (group) 1671 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1672 else 1673 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1674 if (status < 0) 1675 return nfserrno(status); 1676 *p = xdr_encode_opaque(*p, NULL, status); 1677 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1678 BUG_ON(*buflen < 0); 1679 return 0; 1680 } 1681 1682 static inline __be32 1683 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1684 { 1685 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1686 } 1687 1688 static inline __be32 1689 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1690 { 1691 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1692 } 1693 1694 static inline __be32 1695 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1696 __be32 **p, int *buflen) 1697 { 1698 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1699 } 1700 1701 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1702 FATTR4_WORD0_RDATTR_ERROR) 1703 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1704 1705 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1706 { 1707 /* As per referral draft: */ 1708 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1709 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1710 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1711 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1712 *rdattr_err = NFSERR_MOVED; 1713 else 1714 return nfserr_moved; 1715 } 1716 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1717 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1718 return 0; 1719 } 1720 1721 /* 1722 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1723 * ourselves. 1724 * 1725 * @countp is the buffer size in _words_; upon successful return this becomes 1726 * replaced with the number of words written. 1727 */ 1728 __be32 1729 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1730 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1731 struct svc_rqst *rqstp, int ignore_crossmnt) 1732 { 1733 u32 bmval0 = bmval[0]; 1734 u32 bmval1 = bmval[1]; 1735 u32 bmval2 = bmval[2]; 1736 struct kstat stat; 1737 struct svc_fh tempfh; 1738 struct kstatfs statfs; 1739 int buflen = *countp << 2; 1740 __be32 *attrlenp; 1741 u32 dummy; 1742 u64 dummy64; 1743 u32 rdattr_err = 0; 1744 __be32 *p = buffer; 1745 __be32 status; 1746 int err; 1747 int aclsupport = 0; 1748 struct nfs4_acl *acl = NULL; 1749 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1750 u32 minorversion = resp->cstate.minorversion; 1751 1752 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1753 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 1754 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 1755 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 1756 1757 if (exp->ex_fslocs.migrated) { 1758 BUG_ON(bmval[2]); 1759 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1760 if (status) 1761 goto out; 1762 } 1763 1764 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1765 if (err) 1766 goto out_nfserr; 1767 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1768 FATTR4_WORD0_MAXNAME)) || 1769 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1770 FATTR4_WORD1_SPACE_TOTAL))) { 1771 err = vfs_statfs(dentry, &statfs); 1772 if (err) 1773 goto out_nfserr; 1774 } 1775 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1776 fh_init(&tempfh, NFS4_FHSIZE); 1777 status = fh_compose(&tempfh, exp, dentry, NULL); 1778 if (status) 1779 goto out; 1780 fhp = &tempfh; 1781 } 1782 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1783 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1784 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1785 aclsupport = (err == 0); 1786 if (bmval0 & FATTR4_WORD0_ACL) { 1787 if (err == -EOPNOTSUPP) 1788 bmval0 &= ~FATTR4_WORD0_ACL; 1789 else if (err == -EINVAL) { 1790 status = nfserr_attrnotsupp; 1791 goto out; 1792 } else if (err != 0) 1793 goto out_nfserr; 1794 } 1795 } 1796 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1797 if (exp->ex_fslocs.locations == NULL) { 1798 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1799 } 1800 } 1801 if ((buflen -= 16) < 0) 1802 goto out_resource; 1803 1804 if (unlikely(bmval2)) { 1805 WRITE32(3); 1806 WRITE32(bmval0); 1807 WRITE32(bmval1); 1808 WRITE32(bmval2); 1809 } else if (likely(bmval1)) { 1810 WRITE32(2); 1811 WRITE32(bmval0); 1812 WRITE32(bmval1); 1813 } else { 1814 WRITE32(1); 1815 WRITE32(bmval0); 1816 } 1817 attrlenp = p++; /* to be backfilled later */ 1818 1819 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1820 u32 word0 = nfsd_suppattrs0(minorversion); 1821 u32 word1 = nfsd_suppattrs1(minorversion); 1822 u32 word2 = nfsd_suppattrs2(minorversion); 1823 1824 if ((buflen -= 12) < 0) 1825 goto out_resource; 1826 if (!aclsupport) 1827 word0 &= ~FATTR4_WORD0_ACL; 1828 if (!exp->ex_fslocs.locations) 1829 word0 &= ~FATTR4_WORD0_FS_LOCATIONS; 1830 if (!word2) { 1831 WRITE32(2); 1832 WRITE32(word0); 1833 WRITE32(word1); 1834 } else { 1835 WRITE32(3); 1836 WRITE32(word0); 1837 WRITE32(word1); 1838 WRITE32(word2); 1839 } 1840 } 1841 if (bmval0 & FATTR4_WORD0_TYPE) { 1842 if ((buflen -= 4) < 0) 1843 goto out_resource; 1844 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1845 if (dummy == NF4BAD) 1846 goto out_serverfault; 1847 WRITE32(dummy); 1848 } 1849 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1850 if ((buflen -= 4) < 0) 1851 goto out_resource; 1852 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1853 WRITE32(NFS4_FH_PERSISTENT); 1854 else 1855 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1856 } 1857 if (bmval0 & FATTR4_WORD0_CHANGE) { 1858 if ((buflen -= 8) < 0) 1859 goto out_resource; 1860 write_change(&p, &stat, dentry->d_inode); 1861 } 1862 if (bmval0 & FATTR4_WORD0_SIZE) { 1863 if ((buflen -= 8) < 0) 1864 goto out_resource; 1865 WRITE64(stat.size); 1866 } 1867 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1868 if ((buflen -= 4) < 0) 1869 goto out_resource; 1870 WRITE32(1); 1871 } 1872 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1873 if ((buflen -= 4) < 0) 1874 goto out_resource; 1875 WRITE32(1); 1876 } 1877 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1878 if ((buflen -= 4) < 0) 1879 goto out_resource; 1880 WRITE32(0); 1881 } 1882 if (bmval0 & FATTR4_WORD0_FSID) { 1883 if ((buflen -= 16) < 0) 1884 goto out_resource; 1885 if (exp->ex_fslocs.migrated) { 1886 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1887 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1888 } else switch(fsid_source(fhp)) { 1889 case FSIDSOURCE_FSID: 1890 WRITE64((u64)exp->ex_fsid); 1891 WRITE64((u64)0); 1892 break; 1893 case FSIDSOURCE_DEV: 1894 WRITE32(0); 1895 WRITE32(MAJOR(stat.dev)); 1896 WRITE32(0); 1897 WRITE32(MINOR(stat.dev)); 1898 break; 1899 case FSIDSOURCE_UUID: 1900 WRITEMEM(exp->ex_uuid, 16); 1901 break; 1902 } 1903 } 1904 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1905 if ((buflen -= 4) < 0) 1906 goto out_resource; 1907 WRITE32(0); 1908 } 1909 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1910 if ((buflen -= 4) < 0) 1911 goto out_resource; 1912 WRITE32(NFSD_LEASE_TIME); 1913 } 1914 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1915 if ((buflen -= 4) < 0) 1916 goto out_resource; 1917 WRITE32(rdattr_err); 1918 } 1919 if (bmval0 & FATTR4_WORD0_ACL) { 1920 struct nfs4_ace *ace; 1921 1922 if (acl == NULL) { 1923 if ((buflen -= 4) < 0) 1924 goto out_resource; 1925 1926 WRITE32(0); 1927 goto out_acl; 1928 } 1929 if ((buflen -= 4) < 0) 1930 goto out_resource; 1931 WRITE32(acl->naces); 1932 1933 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1934 if ((buflen -= 4*3) < 0) 1935 goto out_resource; 1936 WRITE32(ace->type); 1937 WRITE32(ace->flag); 1938 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1939 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1940 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1941 &p, &buflen); 1942 if (status == nfserr_resource) 1943 goto out_resource; 1944 if (status) 1945 goto out; 1946 } 1947 } 1948 out_acl: 1949 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1950 if ((buflen -= 4) < 0) 1951 goto out_resource; 1952 WRITE32(aclsupport ? 1953 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1954 } 1955 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1956 if ((buflen -= 4) < 0) 1957 goto out_resource; 1958 WRITE32(1); 1959 } 1960 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1961 if ((buflen -= 4) < 0) 1962 goto out_resource; 1963 WRITE32(1); 1964 } 1965 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1966 if ((buflen -= 4) < 0) 1967 goto out_resource; 1968 WRITE32(1); 1969 } 1970 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1971 if ((buflen -= 4) < 0) 1972 goto out_resource; 1973 WRITE32(1); 1974 } 1975 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1976 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1977 if (buflen < 0) 1978 goto out_resource; 1979 WRITE32(fhp->fh_handle.fh_size); 1980 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1981 } 1982 if (bmval0 & FATTR4_WORD0_FILEID) { 1983 if ((buflen -= 8) < 0) 1984 goto out_resource; 1985 WRITE64(stat.ino); 1986 } 1987 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1988 if ((buflen -= 8) < 0) 1989 goto out_resource; 1990 WRITE64((u64) statfs.f_ffree); 1991 } 1992 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1993 if ((buflen -= 8) < 0) 1994 goto out_resource; 1995 WRITE64((u64) statfs.f_ffree); 1996 } 1997 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1998 if ((buflen -= 8) < 0) 1999 goto out_resource; 2000 WRITE64((u64) statfs.f_files); 2001 } 2002 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2003 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 2004 if (status == nfserr_resource) 2005 goto out_resource; 2006 if (status) 2007 goto out; 2008 } 2009 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2010 if ((buflen -= 4) < 0) 2011 goto out_resource; 2012 WRITE32(1); 2013 } 2014 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2015 if ((buflen -= 8) < 0) 2016 goto out_resource; 2017 WRITE64(~(u64)0); 2018 } 2019 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2020 if ((buflen -= 4) < 0) 2021 goto out_resource; 2022 WRITE32(255); 2023 } 2024 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2025 if ((buflen -= 4) < 0) 2026 goto out_resource; 2027 WRITE32(statfs.f_namelen); 2028 } 2029 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2030 if ((buflen -= 8) < 0) 2031 goto out_resource; 2032 WRITE64((u64) svc_max_payload(rqstp)); 2033 } 2034 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2035 if ((buflen -= 8) < 0) 2036 goto out_resource; 2037 WRITE64((u64) svc_max_payload(rqstp)); 2038 } 2039 if (bmval1 & FATTR4_WORD1_MODE) { 2040 if ((buflen -= 4) < 0) 2041 goto out_resource; 2042 WRITE32(stat.mode & S_IALLUGO); 2043 } 2044 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2045 if ((buflen -= 4) < 0) 2046 goto out_resource; 2047 WRITE32(1); 2048 } 2049 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2050 if ((buflen -= 4) < 0) 2051 goto out_resource; 2052 WRITE32(stat.nlink); 2053 } 2054 if (bmval1 & FATTR4_WORD1_OWNER) { 2055 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2056 if (status == nfserr_resource) 2057 goto out_resource; 2058 if (status) 2059 goto out; 2060 } 2061 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2062 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2063 if (status == nfserr_resource) 2064 goto out_resource; 2065 if (status) 2066 goto out; 2067 } 2068 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2069 if ((buflen -= 8) < 0) 2070 goto out_resource; 2071 WRITE32((u32) MAJOR(stat.rdev)); 2072 WRITE32((u32) MINOR(stat.rdev)); 2073 } 2074 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2075 if ((buflen -= 8) < 0) 2076 goto out_resource; 2077 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2078 WRITE64(dummy64); 2079 } 2080 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2081 if ((buflen -= 8) < 0) 2082 goto out_resource; 2083 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2084 WRITE64(dummy64); 2085 } 2086 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2087 if ((buflen -= 8) < 0) 2088 goto out_resource; 2089 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2090 WRITE64(dummy64); 2091 } 2092 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2093 if ((buflen -= 8) < 0) 2094 goto out_resource; 2095 dummy64 = (u64)stat.blocks << 9; 2096 WRITE64(dummy64); 2097 } 2098 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2099 if ((buflen -= 12) < 0) 2100 goto out_resource; 2101 WRITE32(0); 2102 WRITE32(stat.atime.tv_sec); 2103 WRITE32(stat.atime.tv_nsec); 2104 } 2105 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2106 if ((buflen -= 12) < 0) 2107 goto out_resource; 2108 WRITE32(0); 2109 WRITE32(1); 2110 WRITE32(0); 2111 } 2112 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2113 if ((buflen -= 12) < 0) 2114 goto out_resource; 2115 WRITE32(0); 2116 WRITE32(stat.ctime.tv_sec); 2117 WRITE32(stat.ctime.tv_nsec); 2118 } 2119 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2120 if ((buflen -= 12) < 0) 2121 goto out_resource; 2122 WRITE32(0); 2123 WRITE32(stat.mtime.tv_sec); 2124 WRITE32(stat.mtime.tv_nsec); 2125 } 2126 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2127 if ((buflen -= 8) < 0) 2128 goto out_resource; 2129 /* 2130 * Get parent's attributes if not ignoring crossmount 2131 * and this is the root of a cross-mounted filesystem. 2132 */ 2133 if (ignore_crossmnt == 0 && 2134 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { 2135 err = vfs_getattr(exp->ex_path.mnt->mnt_parent, 2136 exp->ex_path.mnt->mnt_mountpoint, &stat); 2137 if (err) 2138 goto out_nfserr; 2139 } 2140 WRITE64(stat.ino); 2141 } 2142 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2143 WRITE32(3); 2144 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2145 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2146 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2147 } 2148 2149 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2150 *countp = p - buffer; 2151 status = nfs_ok; 2152 2153 out: 2154 kfree(acl); 2155 if (fhp == &tempfh) 2156 fh_put(&tempfh); 2157 return status; 2158 out_nfserr: 2159 status = nfserrno(err); 2160 goto out; 2161 out_resource: 2162 *countp = 0; 2163 status = nfserr_resource; 2164 goto out; 2165 out_serverfault: 2166 status = nfserr_serverfault; 2167 goto out; 2168 } 2169 2170 static inline int attributes_need_mount(u32 *bmval) 2171 { 2172 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2173 return 1; 2174 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2175 return 1; 2176 return 0; 2177 } 2178 2179 static __be32 2180 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2181 const char *name, int namlen, __be32 *p, int *buflen) 2182 { 2183 struct svc_export *exp = cd->rd_fhp->fh_export; 2184 struct dentry *dentry; 2185 __be32 nfserr; 2186 int ignore_crossmnt = 0; 2187 2188 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2189 if (IS_ERR(dentry)) 2190 return nfserrno(PTR_ERR(dentry)); 2191 if (!dentry->d_inode) { 2192 /* 2193 * nfsd_buffered_readdir drops the i_mutex between 2194 * readdir and calling this callback, leaving a window 2195 * where this directory entry could have gone away. 2196 */ 2197 dput(dentry); 2198 return nfserr_noent; 2199 } 2200 2201 exp_get(exp); 2202 /* 2203 * In the case of a mountpoint, the client may be asking for 2204 * attributes that are only properties of the underlying filesystem 2205 * as opposed to the cross-mounted file system. In such a case, 2206 * we will not follow the cross mount and will fill the attribtutes 2207 * directly from the mountpoint dentry. 2208 */ 2209 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval)) 2210 ignore_crossmnt = 1; 2211 else if (d_mountpoint(dentry)) { 2212 int err; 2213 2214 /* 2215 * Why the heck aren't we just using nfsd_lookup?? 2216 * Different "."/".." handling? Something else? 2217 * At least, add a comment here to explain.... 2218 */ 2219 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2220 if (err) { 2221 nfserr = nfserrno(err); 2222 goto out_put; 2223 } 2224 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2225 if (nfserr) 2226 goto out_put; 2227 2228 } 2229 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2230 cd->rd_rqstp, ignore_crossmnt); 2231 out_put: 2232 dput(dentry); 2233 exp_put(exp); 2234 return nfserr; 2235 } 2236 2237 static __be32 * 2238 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2239 { 2240 __be32 *attrlenp; 2241 2242 if (buflen < 6) 2243 return NULL; 2244 *p++ = htonl(2); 2245 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2246 *p++ = htonl(0); /* bmval1 */ 2247 2248 attrlenp = p++; 2249 *p++ = nfserr; /* no htonl */ 2250 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2251 return p; 2252 } 2253 2254 static int 2255 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2256 loff_t offset, u64 ino, unsigned int d_type) 2257 { 2258 struct readdir_cd *ccd = ccdv; 2259 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2260 int buflen; 2261 __be32 *p = cd->buffer; 2262 __be32 *cookiep; 2263 __be32 nfserr = nfserr_toosmall; 2264 2265 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2266 if (name && isdotent(name, namlen)) { 2267 cd->common.err = nfs_ok; 2268 return 0; 2269 } 2270 2271 if (cd->offset) 2272 xdr_encode_hyper(cd->offset, (u64) offset); 2273 2274 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2275 if (buflen < 0) 2276 goto fail; 2277 2278 *p++ = xdr_one; /* mark entry present */ 2279 cookiep = p; 2280 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2281 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2282 2283 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2284 switch (nfserr) { 2285 case nfs_ok: 2286 p += buflen; 2287 break; 2288 case nfserr_resource: 2289 nfserr = nfserr_toosmall; 2290 goto fail; 2291 case nfserr_dropit: 2292 goto fail; 2293 case nfserr_noent: 2294 goto skip_entry; 2295 default: 2296 /* 2297 * If the client requested the RDATTR_ERROR attribute, 2298 * we stuff the error code into this attribute 2299 * and continue. If this attribute was not requested, 2300 * then in accordance with the spec, we fail the 2301 * entire READDIR operation(!) 2302 */ 2303 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2304 goto fail; 2305 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2306 if (p == NULL) { 2307 nfserr = nfserr_toosmall; 2308 goto fail; 2309 } 2310 } 2311 cd->buflen -= (p - cd->buffer); 2312 cd->buffer = p; 2313 cd->offset = cookiep; 2314 skip_entry: 2315 cd->common.err = nfs_ok; 2316 return 0; 2317 fail: 2318 cd->common.err = nfserr; 2319 return -EINVAL; 2320 } 2321 2322 static void 2323 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2324 { 2325 __be32 *p; 2326 2327 RESERVE_SPACE(sizeof(stateid_t)); 2328 WRITE32(sid->si_generation); 2329 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2330 ADJUST_ARGS(); 2331 } 2332 2333 static __be32 2334 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2335 { 2336 __be32 *p; 2337 2338 if (!nfserr) { 2339 RESERVE_SPACE(8); 2340 WRITE32(access->ac_supported); 2341 WRITE32(access->ac_resp_access); 2342 ADJUST_ARGS(); 2343 } 2344 return nfserr; 2345 } 2346 2347 static __be32 2348 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2349 { 2350 ENCODE_SEQID_OP_HEAD; 2351 2352 if (!nfserr) 2353 nfsd4_encode_stateid(resp, &close->cl_stateid); 2354 2355 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2356 return nfserr; 2357 } 2358 2359 2360 static __be32 2361 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2362 { 2363 __be32 *p; 2364 2365 if (!nfserr) { 2366 RESERVE_SPACE(8); 2367 WRITEMEM(commit->co_verf.data, 8); 2368 ADJUST_ARGS(); 2369 } 2370 return nfserr; 2371 } 2372 2373 static __be32 2374 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2375 { 2376 __be32 *p; 2377 2378 if (!nfserr) { 2379 RESERVE_SPACE(32); 2380 write_cinfo(&p, &create->cr_cinfo); 2381 WRITE32(2); 2382 WRITE32(create->cr_bmval[0]); 2383 WRITE32(create->cr_bmval[1]); 2384 ADJUST_ARGS(); 2385 } 2386 return nfserr; 2387 } 2388 2389 static __be32 2390 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2391 { 2392 struct svc_fh *fhp = getattr->ga_fhp; 2393 int buflen; 2394 2395 if (nfserr) 2396 return nfserr; 2397 2398 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2399 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2400 resp->p, &buflen, getattr->ga_bmval, 2401 resp->rqstp, 0); 2402 if (!nfserr) 2403 resp->p += buflen; 2404 return nfserr; 2405 } 2406 2407 static __be32 2408 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2409 { 2410 struct svc_fh *fhp = *fhpp; 2411 unsigned int len; 2412 __be32 *p; 2413 2414 if (!nfserr) { 2415 len = fhp->fh_handle.fh_size; 2416 RESERVE_SPACE(len + 4); 2417 WRITE32(len); 2418 WRITEMEM(&fhp->fh_handle.fh_base, len); 2419 ADJUST_ARGS(); 2420 } 2421 return nfserr; 2422 } 2423 2424 /* 2425 * Including all fields other than the name, a LOCK4denied structure requires 2426 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2427 */ 2428 static void 2429 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2430 { 2431 __be32 *p; 2432 2433 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2434 WRITE64(ld->ld_start); 2435 WRITE64(ld->ld_length); 2436 WRITE32(ld->ld_type); 2437 if (ld->ld_sop) { 2438 WRITEMEM(&ld->ld_clientid, 8); 2439 WRITE32(ld->ld_sop->so_owner.len); 2440 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2441 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2442 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2443 WRITE64((u64)0); /* clientid */ 2444 WRITE32(0); /* length of owner name */ 2445 } 2446 ADJUST_ARGS(); 2447 } 2448 2449 static __be32 2450 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2451 { 2452 ENCODE_SEQID_OP_HEAD; 2453 2454 if (!nfserr) 2455 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2456 else if (nfserr == nfserr_denied) 2457 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2458 2459 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2460 return nfserr; 2461 } 2462 2463 static __be32 2464 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2465 { 2466 if (nfserr == nfserr_denied) 2467 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2468 return nfserr; 2469 } 2470 2471 static __be32 2472 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2473 { 2474 ENCODE_SEQID_OP_HEAD; 2475 2476 if (!nfserr) 2477 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2478 2479 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2480 return nfserr; 2481 } 2482 2483 2484 static __be32 2485 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2486 { 2487 __be32 *p; 2488 2489 if (!nfserr) { 2490 RESERVE_SPACE(20); 2491 write_cinfo(&p, &link->li_cinfo); 2492 ADJUST_ARGS(); 2493 } 2494 return nfserr; 2495 } 2496 2497 2498 static __be32 2499 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2500 { 2501 __be32 *p; 2502 ENCODE_SEQID_OP_HEAD; 2503 2504 if (nfserr) 2505 goto out; 2506 2507 nfsd4_encode_stateid(resp, &open->op_stateid); 2508 RESERVE_SPACE(40); 2509 write_cinfo(&p, &open->op_cinfo); 2510 WRITE32(open->op_rflags); 2511 WRITE32(2); 2512 WRITE32(open->op_bmval[0]); 2513 WRITE32(open->op_bmval[1]); 2514 WRITE32(open->op_delegate_type); 2515 ADJUST_ARGS(); 2516 2517 switch (open->op_delegate_type) { 2518 case NFS4_OPEN_DELEGATE_NONE: 2519 break; 2520 case NFS4_OPEN_DELEGATE_READ: 2521 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2522 RESERVE_SPACE(20); 2523 WRITE32(open->op_recall); 2524 2525 /* 2526 * TODO: ACE's in delegations 2527 */ 2528 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2529 WRITE32(0); 2530 WRITE32(0); 2531 WRITE32(0); /* XXX: is NULL principal ok? */ 2532 ADJUST_ARGS(); 2533 break; 2534 case NFS4_OPEN_DELEGATE_WRITE: 2535 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2536 RESERVE_SPACE(32); 2537 WRITE32(0); 2538 2539 /* 2540 * TODO: space_limit's in delegations 2541 */ 2542 WRITE32(NFS4_LIMIT_SIZE); 2543 WRITE32(~(u32)0); 2544 WRITE32(~(u32)0); 2545 2546 /* 2547 * TODO: ACE's in delegations 2548 */ 2549 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2550 WRITE32(0); 2551 WRITE32(0); 2552 WRITE32(0); /* XXX: is NULL principal ok? */ 2553 ADJUST_ARGS(); 2554 break; 2555 default: 2556 BUG(); 2557 } 2558 /* XXX save filehandle here */ 2559 out: 2560 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2561 return nfserr; 2562 } 2563 2564 static __be32 2565 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2566 { 2567 ENCODE_SEQID_OP_HEAD; 2568 2569 if (!nfserr) 2570 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2571 2572 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2573 return nfserr; 2574 } 2575 2576 static __be32 2577 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2578 { 2579 ENCODE_SEQID_OP_HEAD; 2580 2581 if (!nfserr) 2582 nfsd4_encode_stateid(resp, &od->od_stateid); 2583 2584 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2585 return nfserr; 2586 } 2587 2588 static __be32 2589 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2590 struct nfsd4_read *read) 2591 { 2592 u32 eof; 2593 int v, pn; 2594 unsigned long maxcount; 2595 long len; 2596 __be32 *p; 2597 2598 if (nfserr) 2599 return nfserr; 2600 if (resp->xbuf->page_len) 2601 return nfserr_resource; 2602 2603 RESERVE_SPACE(8); /* eof flag and byte count */ 2604 2605 maxcount = svc_max_payload(resp->rqstp); 2606 if (maxcount > read->rd_length) 2607 maxcount = read->rd_length; 2608 2609 len = maxcount; 2610 v = 0; 2611 while (len > 0) { 2612 pn = resp->rqstp->rq_resused++; 2613 resp->rqstp->rq_vec[v].iov_base = 2614 page_address(resp->rqstp->rq_respages[pn]); 2615 resp->rqstp->rq_vec[v].iov_len = 2616 len < PAGE_SIZE ? len : PAGE_SIZE; 2617 v++; 2618 len -= PAGE_SIZE; 2619 } 2620 read->rd_vlen = v; 2621 2622 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2623 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2624 &maxcount); 2625 2626 if (nfserr == nfserr_symlink) 2627 nfserr = nfserr_inval; 2628 if (nfserr) 2629 return nfserr; 2630 eof = (read->rd_offset + maxcount >= 2631 read->rd_fhp->fh_dentry->d_inode->i_size); 2632 2633 WRITE32(eof); 2634 WRITE32(maxcount); 2635 ADJUST_ARGS(); 2636 resp->xbuf->head[0].iov_len = (char*)p 2637 - (char*)resp->xbuf->head[0].iov_base; 2638 resp->xbuf->page_len = maxcount; 2639 2640 /* Use rest of head for padding and remaining ops: */ 2641 resp->xbuf->tail[0].iov_base = p; 2642 resp->xbuf->tail[0].iov_len = 0; 2643 if (maxcount&3) { 2644 RESERVE_SPACE(4); 2645 WRITE32(0); 2646 resp->xbuf->tail[0].iov_base += maxcount&3; 2647 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2648 ADJUST_ARGS(); 2649 } 2650 return 0; 2651 } 2652 2653 static __be32 2654 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2655 { 2656 int maxcount; 2657 char *page; 2658 __be32 *p; 2659 2660 if (nfserr) 2661 return nfserr; 2662 if (resp->xbuf->page_len) 2663 return nfserr_resource; 2664 2665 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2666 2667 maxcount = PAGE_SIZE; 2668 RESERVE_SPACE(4); 2669 2670 /* 2671 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2672 * if they would overflow the buffer. Is this kosher in NFSv4? If 2673 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2674 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2675 */ 2676 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2677 if (nfserr == nfserr_isdir) 2678 return nfserr_inval; 2679 if (nfserr) 2680 return nfserr; 2681 2682 WRITE32(maxcount); 2683 ADJUST_ARGS(); 2684 resp->xbuf->head[0].iov_len = (char*)p 2685 - (char*)resp->xbuf->head[0].iov_base; 2686 resp->xbuf->page_len = maxcount; 2687 2688 /* Use rest of head for padding and remaining ops: */ 2689 resp->xbuf->tail[0].iov_base = p; 2690 resp->xbuf->tail[0].iov_len = 0; 2691 if (maxcount&3) { 2692 RESERVE_SPACE(4); 2693 WRITE32(0); 2694 resp->xbuf->tail[0].iov_base += maxcount&3; 2695 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2696 ADJUST_ARGS(); 2697 } 2698 return 0; 2699 } 2700 2701 static __be32 2702 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2703 { 2704 int maxcount; 2705 loff_t offset; 2706 __be32 *page, *savep, *tailbase; 2707 __be32 *p; 2708 2709 if (nfserr) 2710 return nfserr; 2711 if (resp->xbuf->page_len) 2712 return nfserr_resource; 2713 2714 RESERVE_SPACE(8); /* verifier */ 2715 savep = p; 2716 2717 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2718 WRITE32(0); 2719 WRITE32(0); 2720 ADJUST_ARGS(); 2721 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2722 tailbase = p; 2723 2724 maxcount = PAGE_SIZE; 2725 if (maxcount > readdir->rd_maxcount) 2726 maxcount = readdir->rd_maxcount; 2727 2728 /* 2729 * Convert from bytes to words, account for the two words already 2730 * written, make sure to leave two words at the end for the next 2731 * pointer and eof field. 2732 */ 2733 maxcount = (maxcount >> 2) - 4; 2734 if (maxcount < 0) { 2735 nfserr = nfserr_toosmall; 2736 goto err_no_verf; 2737 } 2738 2739 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2740 readdir->common.err = 0; 2741 readdir->buflen = maxcount; 2742 readdir->buffer = page; 2743 readdir->offset = NULL; 2744 2745 offset = readdir->rd_cookie; 2746 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2747 &offset, 2748 &readdir->common, nfsd4_encode_dirent); 2749 if (nfserr == nfs_ok && 2750 readdir->common.err == nfserr_toosmall && 2751 readdir->buffer == page) 2752 nfserr = nfserr_toosmall; 2753 if (nfserr == nfserr_symlink) 2754 nfserr = nfserr_notdir; 2755 if (nfserr) 2756 goto err_no_verf; 2757 2758 if (readdir->offset) 2759 xdr_encode_hyper(readdir->offset, offset); 2760 2761 p = readdir->buffer; 2762 *p++ = 0; /* no more entries */ 2763 *p++ = htonl(readdir->common.err == nfserr_eof); 2764 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2765 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2766 2767 /* Use rest of head for padding and remaining ops: */ 2768 resp->xbuf->tail[0].iov_base = tailbase; 2769 resp->xbuf->tail[0].iov_len = 0; 2770 resp->p = resp->xbuf->tail[0].iov_base; 2771 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2772 2773 return 0; 2774 err_no_verf: 2775 p = savep; 2776 ADJUST_ARGS(); 2777 return nfserr; 2778 } 2779 2780 static __be32 2781 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2782 { 2783 __be32 *p; 2784 2785 if (!nfserr) { 2786 RESERVE_SPACE(20); 2787 write_cinfo(&p, &remove->rm_cinfo); 2788 ADJUST_ARGS(); 2789 } 2790 return nfserr; 2791 } 2792 2793 static __be32 2794 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2795 { 2796 __be32 *p; 2797 2798 if (!nfserr) { 2799 RESERVE_SPACE(40); 2800 write_cinfo(&p, &rename->rn_sinfo); 2801 write_cinfo(&p, &rename->rn_tinfo); 2802 ADJUST_ARGS(); 2803 } 2804 return nfserr; 2805 } 2806 2807 static __be32 2808 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2809 struct nfsd4_secinfo *secinfo) 2810 { 2811 int i = 0; 2812 struct svc_export *exp = secinfo->si_exp; 2813 u32 nflavs; 2814 struct exp_flavor_info *flavs; 2815 struct exp_flavor_info def_flavs[2]; 2816 __be32 *p; 2817 2818 if (nfserr) 2819 goto out; 2820 if (exp->ex_nflavors) { 2821 flavs = exp->ex_flavors; 2822 nflavs = exp->ex_nflavors; 2823 } else { /* Handling of some defaults in absence of real secinfo: */ 2824 flavs = def_flavs; 2825 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2826 nflavs = 2; 2827 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2828 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2829 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2830 nflavs = 1; 2831 flavs[0].pseudoflavor 2832 = svcauth_gss_flavor(exp->ex_client); 2833 } else { 2834 nflavs = 1; 2835 flavs[0].pseudoflavor 2836 = exp->ex_client->flavour->flavour; 2837 } 2838 } 2839 2840 RESERVE_SPACE(4); 2841 WRITE32(nflavs); 2842 ADJUST_ARGS(); 2843 for (i = 0; i < nflavs; i++) { 2844 u32 flav = flavs[i].pseudoflavor; 2845 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2846 2847 if (gm) { 2848 RESERVE_SPACE(4); 2849 WRITE32(RPC_AUTH_GSS); 2850 ADJUST_ARGS(); 2851 RESERVE_SPACE(4 + gm->gm_oid.len); 2852 WRITE32(gm->gm_oid.len); 2853 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2854 ADJUST_ARGS(); 2855 RESERVE_SPACE(4); 2856 WRITE32(0); /* qop */ 2857 ADJUST_ARGS(); 2858 RESERVE_SPACE(4); 2859 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2860 ADJUST_ARGS(); 2861 gss_mech_put(gm); 2862 } else { 2863 RESERVE_SPACE(4); 2864 WRITE32(flav); 2865 ADJUST_ARGS(); 2866 } 2867 } 2868 out: 2869 if (exp) 2870 exp_put(exp); 2871 return nfserr; 2872 } 2873 2874 /* 2875 * The SETATTR encode routine is special -- it always encodes a bitmap, 2876 * regardless of the error status. 2877 */ 2878 static __be32 2879 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2880 { 2881 __be32 *p; 2882 2883 RESERVE_SPACE(12); 2884 if (nfserr) { 2885 WRITE32(2); 2886 WRITE32(0); 2887 WRITE32(0); 2888 } 2889 else { 2890 WRITE32(2); 2891 WRITE32(setattr->sa_bmval[0]); 2892 WRITE32(setattr->sa_bmval[1]); 2893 } 2894 ADJUST_ARGS(); 2895 return nfserr; 2896 } 2897 2898 static __be32 2899 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2900 { 2901 __be32 *p; 2902 2903 if (!nfserr) { 2904 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2905 WRITEMEM(&scd->se_clientid, 8); 2906 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2907 ADJUST_ARGS(); 2908 } 2909 else if (nfserr == nfserr_clid_inuse) { 2910 RESERVE_SPACE(8); 2911 WRITE32(0); 2912 WRITE32(0); 2913 ADJUST_ARGS(); 2914 } 2915 return nfserr; 2916 } 2917 2918 static __be32 2919 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2920 { 2921 __be32 *p; 2922 2923 if (!nfserr) { 2924 RESERVE_SPACE(16); 2925 WRITE32(write->wr_bytes_written); 2926 WRITE32(write->wr_how_written); 2927 WRITEMEM(write->wr_verifier.data, 8); 2928 ADJUST_ARGS(); 2929 } 2930 return nfserr; 2931 } 2932 2933 static __be32 2934 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 2935 struct nfsd4_exchange_id *exid) 2936 { 2937 __be32 *p; 2938 char *major_id; 2939 char *server_scope; 2940 int major_id_sz; 2941 int server_scope_sz; 2942 uint64_t minor_id = 0; 2943 2944 if (nfserr) 2945 return nfserr; 2946 2947 major_id = utsname()->nodename; 2948 major_id_sz = strlen(major_id); 2949 server_scope = utsname()->nodename; 2950 server_scope_sz = strlen(server_scope); 2951 2952 RESERVE_SPACE( 2953 8 /* eir_clientid */ + 2954 4 /* eir_sequenceid */ + 2955 4 /* eir_flags */ + 2956 4 /* spr_how (SP4_NONE) */ + 2957 8 /* so_minor_id */ + 2958 4 /* so_major_id.len */ + 2959 (XDR_QUADLEN(major_id_sz) * 4) + 2960 4 /* eir_server_scope.len */ + 2961 (XDR_QUADLEN(server_scope_sz) * 4) + 2962 4 /* eir_server_impl_id.count (0) */); 2963 2964 WRITEMEM(&exid->clientid, 8); 2965 WRITE32(exid->seqid); 2966 WRITE32(exid->flags); 2967 2968 /* state_protect4_r. Currently only support SP4_NONE */ 2969 BUG_ON(exid->spa_how != SP4_NONE); 2970 WRITE32(exid->spa_how); 2971 2972 /* The server_owner struct */ 2973 WRITE64(minor_id); /* Minor id */ 2974 /* major id */ 2975 WRITE32(major_id_sz); 2976 WRITEMEM(major_id, major_id_sz); 2977 2978 /* Server scope */ 2979 WRITE32(server_scope_sz); 2980 WRITEMEM(server_scope, server_scope_sz); 2981 2982 /* Implementation id */ 2983 WRITE32(0); /* zero length nfs_impl_id4 array */ 2984 ADJUST_ARGS(); 2985 return 0; 2986 } 2987 2988 static __be32 2989 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 2990 struct nfsd4_create_session *sess) 2991 { 2992 __be32 *p; 2993 2994 if (nfserr) 2995 return nfserr; 2996 2997 RESERVE_SPACE(24); 2998 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2999 WRITE32(sess->seqid); 3000 WRITE32(sess->flags); 3001 ADJUST_ARGS(); 3002 3003 RESERVE_SPACE(28); 3004 WRITE32(0); /* headerpadsz */ 3005 WRITE32(sess->fore_channel.maxreq_sz); 3006 WRITE32(sess->fore_channel.maxresp_sz); 3007 WRITE32(sess->fore_channel.maxresp_cached); 3008 WRITE32(sess->fore_channel.maxops); 3009 WRITE32(sess->fore_channel.maxreqs); 3010 WRITE32(sess->fore_channel.nr_rdma_attrs); 3011 ADJUST_ARGS(); 3012 3013 if (sess->fore_channel.nr_rdma_attrs) { 3014 RESERVE_SPACE(4); 3015 WRITE32(sess->fore_channel.rdma_attrs); 3016 ADJUST_ARGS(); 3017 } 3018 3019 RESERVE_SPACE(28); 3020 WRITE32(0); /* headerpadsz */ 3021 WRITE32(sess->back_channel.maxreq_sz); 3022 WRITE32(sess->back_channel.maxresp_sz); 3023 WRITE32(sess->back_channel.maxresp_cached); 3024 WRITE32(sess->back_channel.maxops); 3025 WRITE32(sess->back_channel.maxreqs); 3026 WRITE32(sess->back_channel.nr_rdma_attrs); 3027 ADJUST_ARGS(); 3028 3029 if (sess->back_channel.nr_rdma_attrs) { 3030 RESERVE_SPACE(4); 3031 WRITE32(sess->back_channel.rdma_attrs); 3032 ADJUST_ARGS(); 3033 } 3034 return 0; 3035 } 3036 3037 static __be32 3038 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3039 struct nfsd4_destroy_session *destroy_session) 3040 { 3041 return nfserr; 3042 } 3043 3044 __be32 3045 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3046 struct nfsd4_sequence *seq) 3047 { 3048 __be32 *p; 3049 3050 if (nfserr) 3051 return nfserr; 3052 3053 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3054 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3055 WRITE32(seq->seqid); 3056 WRITE32(seq->slotid); 3057 WRITE32(seq->maxslots); 3058 /* 3059 * FIXME: for now: 3060 * target_maxslots = maxslots 3061 * status_flags = 0 3062 */ 3063 WRITE32(seq->maxslots); 3064 WRITE32(0); 3065 3066 ADJUST_ARGS(); 3067 return 0; 3068 } 3069 3070 static __be32 3071 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3072 { 3073 return nfserr; 3074 } 3075 3076 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3077 3078 /* 3079 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3080 * since we don't need to filter out obsolete ops as this is 3081 * done in the decoding phase. 3082 */ 3083 static nfsd4_enc nfsd4_enc_ops[] = { 3084 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3085 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3086 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3087 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3088 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3089 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3090 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3091 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3092 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3093 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3094 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3095 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3096 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3097 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3098 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3099 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3100 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3101 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3102 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3103 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3104 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3105 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3106 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3107 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3108 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3109 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3110 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3111 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3112 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3113 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3114 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3115 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3116 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3117 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3118 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3119 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3120 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3121 3122 /* NFSv4.1 operations */ 3123 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3124 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 3125 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3126 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3127 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3128 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3129 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3130 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3131 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3132 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3133 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3134 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3135 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop, 3136 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3137 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3138 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3139 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3140 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3141 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3142 }; 3143 3144 /* 3145 * Calculate the total amount of memory that the compound response has taken 3146 * after encoding the current operation. 3147 * 3148 * pad: add on 8 bytes for the next operation's op_code and status so that 3149 * there is room to cache a failure on the next operation. 3150 * 3151 * Compare this length to the session se_fmaxresp_cached. 3152 * 3153 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3154 * will be at least a page and will therefore hold the xdr_buf head. 3155 */ 3156 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) 3157 { 3158 int status = 0; 3159 struct xdr_buf *xb = &resp->rqstp->rq_res; 3160 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; 3161 struct nfsd4_session *session = NULL; 3162 struct nfsd4_slot *slot = resp->cstate.slot; 3163 u32 length, tlen = 0, pad = 8; 3164 3165 if (!nfsd4_has_session(&resp->cstate)) 3166 return status; 3167 3168 session = resp->cstate.session; 3169 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0) 3170 return status; 3171 3172 if (resp->opcnt >= args->opcnt) 3173 pad = 0; /* this is the last operation */ 3174 3175 if (xb->page_len == 0) { 3176 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3177 } else { 3178 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3179 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3180 3181 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3182 } 3183 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3184 length, xb->page_len, tlen, pad); 3185 3186 if (length <= session->se_fchannel.maxresp_cached) 3187 return status; 3188 else 3189 return nfserr_rep_too_big_to_cache; 3190 } 3191 3192 void 3193 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3194 { 3195 __be32 *statp; 3196 __be32 *p; 3197 3198 RESERVE_SPACE(8); 3199 WRITE32(op->opnum); 3200 statp = p++; /* to be backfilled at the end */ 3201 ADJUST_ARGS(); 3202 3203 if (op->opnum == OP_ILLEGAL) 3204 goto status; 3205 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3206 !nfsd4_enc_ops[op->opnum]); 3207 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3208 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3209 if (!op->status && nfsd4_check_drc_limit(resp)) 3210 op->status = nfserr_rep_too_big_to_cache; 3211 status: 3212 /* 3213 * Note: We write the status directly, instead of using WRITE32(), 3214 * since it is already in network byte order. 3215 */ 3216 *statp = op->status; 3217 } 3218 3219 /* 3220 * Encode the reply stored in the stateowner reply cache 3221 * 3222 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3223 * previously sent already encoded operation. 3224 * 3225 * called with nfs4_lock_state() held 3226 */ 3227 void 3228 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3229 { 3230 __be32 *p; 3231 struct nfs4_replay *rp = op->replay; 3232 3233 BUG_ON(!rp); 3234 3235 RESERVE_SPACE(8); 3236 WRITE32(op->opnum); 3237 *p++ = rp->rp_status; /* already xdr'ed */ 3238 ADJUST_ARGS(); 3239 3240 RESERVE_SPACE(rp->rp_buflen); 3241 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3242 ADJUST_ARGS(); 3243 } 3244 3245 int 3246 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3247 { 3248 return xdr_ressize_check(rqstp, p); 3249 } 3250 3251 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 3252 { 3253 if (args->ops != args->iops) { 3254 kfree(args->ops); 3255 args->ops = args->iops; 3256 } 3257 kfree(args->tmpp); 3258 args->tmpp = NULL; 3259 while (args->to_free) { 3260 struct tmpbuf *tb = args->to_free; 3261 args->to_free = tb->next; 3262 tb->release(tb->buf); 3263 kfree(tb); 3264 } 3265 } 3266 3267 int 3268 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3269 { 3270 __be32 status; 3271 3272 args->p = p; 3273 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3274 args->pagelist = rqstp->rq_arg.pages; 3275 args->pagelen = rqstp->rq_arg.page_len; 3276 args->tmpp = NULL; 3277 args->to_free = NULL; 3278 args->ops = args->iops; 3279 args->rqstp = rqstp; 3280 3281 status = nfsd4_decode_compound(args); 3282 if (status) { 3283 nfsd4_release_compoundargs(args); 3284 } 3285 return !status; 3286 } 3287 3288 int 3289 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3290 { 3291 /* 3292 * All that remains is to write the tag and operation count... 3293 */ 3294 struct kvec *iov; 3295 p = resp->tagp; 3296 *p++ = htonl(resp->taglen); 3297 memcpy(p, resp->tag, resp->taglen); 3298 p += XDR_QUADLEN(resp->taglen); 3299 *p++ = htonl(resp->opcnt); 3300 3301 if (rqstp->rq_res.page_len) 3302 iov = &rqstp->rq_res.tail[0]; 3303 else 3304 iov = &rqstp->rq_res.head[0]; 3305 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3306 BUG_ON(iov->iov_len > PAGE_SIZE); 3307 if (nfsd4_has_session(&resp->cstate)) { 3308 if (resp->cstate.status == nfserr_replay_cache && 3309 !nfsd4_not_cached(resp)) { 3310 iov->iov_len = resp->cstate.iovlen; 3311 } else { 3312 nfsd4_store_cache_entry(resp); 3313 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3314 resp->cstate.slot->sl_inuse = 0; 3315 } 3316 if (resp->cstate.session) 3317 nfsd4_put_session(resp->cstate.session); 3318 } 3319 return 1; 3320 } 3321 3322 /* 3323 * Local variables: 3324 * c-basic-offset: 8 3325 * End: 3326 */ 3327