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/slab.h> 44 #include <linux/namei.h> 45 #include <linux/statfs.h> 46 #include <linux/utsname.h> 47 #include <linux/sunrpc/svcauth_gss.h> 48 49 #include "idmap.h" 50 #include "acl.h" 51 #include "xdr4.h" 52 #include "vfs.h" 53 54 55 #define NFSDDBG_FACILITY NFSDDBG_XDR 56 57 /* 58 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 59 * directory in order to indicate to the client that a filesystem boundary is present 60 * We use a fixed fsid for a referral 61 */ 62 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 63 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 64 65 static __be32 66 check_filename(char *str, int len, __be32 err) 67 { 68 int i; 69 70 if (len == 0) 71 return nfserr_inval; 72 if (isdotent(str, len)) 73 return err; 74 for (i = 0; i < len; i++) 75 if (str[i] == '/') 76 return err; 77 return 0; 78 } 79 80 #define DECODE_HEAD \ 81 __be32 *p; \ 82 __be32 status 83 #define DECODE_TAIL \ 84 status = 0; \ 85 out: \ 86 return status; \ 87 xdr_error: \ 88 dprintk("NFSD: xdr error (%s:%d)\n", \ 89 __FILE__, __LINE__); \ 90 status = nfserr_bad_xdr; \ 91 goto out 92 93 #define READ32(x) (x) = ntohl(*p++) 94 #define READ64(x) do { \ 95 (x) = (u64)ntohl(*p++) << 32; \ 96 (x) |= ntohl(*p++); \ 97 } while (0) 98 #define READTIME(x) do { \ 99 p++; \ 100 (x) = ntohl(*p++); \ 101 p++; \ 102 } while (0) 103 #define READMEM(x,nbytes) do { \ 104 x = (char *)p; \ 105 p += XDR_QUADLEN(nbytes); \ 106 } while (0) 107 #define SAVEMEM(x,nbytes) do { \ 108 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 109 savemem(argp, p, nbytes) : \ 110 (char *)p)) { \ 111 dprintk("NFSD: xdr error (%s:%d)\n", \ 112 __FILE__, __LINE__); \ 113 goto xdr_error; \ 114 } \ 115 p += XDR_QUADLEN(nbytes); \ 116 } while (0) 117 #define COPYMEM(x,nbytes) do { \ 118 memcpy((x), p, nbytes); \ 119 p += XDR_QUADLEN(nbytes); \ 120 } while (0) 121 122 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 123 #define READ_BUF(nbytes) do { \ 124 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 125 p = argp->p; \ 126 argp->p += XDR_QUADLEN(nbytes); \ 127 } else if (!(p = read_buf(argp, nbytes))) { \ 128 dprintk("NFSD: xdr error (%s:%d)\n", \ 129 __FILE__, __LINE__); \ 130 goto xdr_error; \ 131 } \ 132 } while (0) 133 134 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 135 { 136 /* We want more bytes than seem to be available. 137 * Maybe we need a new page, maybe we have just run out 138 */ 139 unsigned int avail = (char *)argp->end - (char *)argp->p; 140 __be32 *p; 141 if (avail + argp->pagelen < nbytes) 142 return NULL; 143 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 144 return NULL; 145 /* ok, we can do it with the current plus the next page */ 146 if (nbytes <= sizeof(argp->tmp)) 147 p = argp->tmp; 148 else { 149 kfree(argp->tmpp); 150 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 151 if (!p) 152 return NULL; 153 154 } 155 /* 156 * The following memcpy is safe because read_buf is always 157 * called with nbytes > avail, and the two cases above both 158 * guarantee p points to at least nbytes bytes. 159 */ 160 memcpy(p, argp->p, avail); 161 /* step to next page */ 162 argp->p = page_address(argp->pagelist[0]); 163 argp->pagelist++; 164 if (argp->pagelen < PAGE_SIZE) { 165 argp->end = argp->p + (argp->pagelen>>2); 166 argp->pagelen = 0; 167 } else { 168 argp->end = argp->p + (PAGE_SIZE>>2); 169 argp->pagelen -= PAGE_SIZE; 170 } 171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 172 argp->p += XDR_QUADLEN(nbytes - avail); 173 return p; 174 } 175 176 static int zero_clientid(clientid_t *clid) 177 { 178 return (clid->cl_boot == 0) && (clid->cl_id == 0); 179 } 180 181 static int 182 defer_free(struct nfsd4_compoundargs *argp, 183 void (*release)(const void *), void *p) 184 { 185 struct tmpbuf *tb; 186 187 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 188 if (!tb) 189 return -ENOMEM; 190 tb->buf = p; 191 tb->release = release; 192 tb->next = argp->to_free; 193 argp->to_free = tb; 194 return 0; 195 } 196 197 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 198 { 199 if (p == argp->tmp) { 200 p = kmalloc(nbytes, GFP_KERNEL); 201 if (!p) 202 return NULL; 203 memcpy(p, argp->tmp, nbytes); 204 } else { 205 BUG_ON(p != argp->tmpp); 206 argp->tmpp = NULL; 207 } 208 if (defer_free(argp, kfree, p)) { 209 kfree(p); 210 return NULL; 211 } else 212 return (char *)p; 213 } 214 215 static __be32 216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 217 { 218 u32 bmlen; 219 DECODE_HEAD; 220 221 bmval[0] = 0; 222 bmval[1] = 0; 223 bmval[2] = 0; 224 225 READ_BUF(4); 226 READ32(bmlen); 227 if (bmlen > 1000) 228 goto xdr_error; 229 230 READ_BUF(bmlen << 2); 231 if (bmlen > 0) 232 READ32(bmval[0]); 233 if (bmlen > 1) 234 READ32(bmval[1]); 235 if (bmlen > 2) 236 READ32(bmval[2]); 237 238 DECODE_TAIL; 239 } 240 241 static __be32 242 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 243 struct iattr *iattr, struct nfs4_acl **acl) 244 { 245 int expected_len, len = 0; 246 u32 dummy32; 247 char *buf; 248 int host_err; 249 250 DECODE_HEAD; 251 iattr->ia_valid = 0; 252 if ((status = nfsd4_decode_bitmap(argp, bmval))) 253 return status; 254 255 READ_BUF(4); 256 READ32(expected_len); 257 258 if (bmval[0] & FATTR4_WORD0_SIZE) { 259 READ_BUF(8); 260 len += 8; 261 READ64(iattr->ia_size); 262 iattr->ia_valid |= ATTR_SIZE; 263 } 264 if (bmval[0] & FATTR4_WORD0_ACL) { 265 int nace; 266 struct nfs4_ace *ace; 267 268 READ_BUF(4); len += 4; 269 READ32(nace); 270 271 if (nace > NFS4_ACL_MAX) 272 return nfserr_resource; 273 274 *acl = nfs4_acl_new(nace); 275 if (*acl == NULL) { 276 host_err = -ENOMEM; 277 goto out_nfserr; 278 } 279 defer_free(argp, kfree, *acl); 280 281 (*acl)->naces = nace; 282 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 283 READ_BUF(16); len += 16; 284 READ32(ace->type); 285 READ32(ace->flag); 286 READ32(ace->access_mask); 287 READ32(dummy32); 288 READ_BUF(dummy32); 289 len += XDR_QUADLEN(dummy32) << 2; 290 READMEM(buf, dummy32); 291 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 292 status = nfs_ok; 293 if (ace->whotype != NFS4_ACL_WHO_NAMED) 294 ace->who = 0; 295 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 296 status = nfsd_map_name_to_gid(argp->rqstp, 297 buf, dummy32, &ace->who); 298 else 299 status = nfsd_map_name_to_uid(argp->rqstp, 300 buf, dummy32, &ace->who); 301 if (status) 302 return status; 303 } 304 } else 305 *acl = NULL; 306 if (bmval[1] & FATTR4_WORD1_MODE) { 307 READ_BUF(4); 308 len += 4; 309 READ32(iattr->ia_mode); 310 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 311 iattr->ia_valid |= ATTR_MODE; 312 } 313 if (bmval[1] & FATTR4_WORD1_OWNER) { 314 READ_BUF(4); 315 len += 4; 316 READ32(dummy32); 317 READ_BUF(dummy32); 318 len += (XDR_QUADLEN(dummy32) << 2); 319 READMEM(buf, dummy32); 320 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 321 return status; 322 iattr->ia_valid |= ATTR_UID; 323 } 324 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 325 READ_BUF(4); 326 len += 4; 327 READ32(dummy32); 328 READ_BUF(dummy32); 329 len += (XDR_QUADLEN(dummy32) << 2); 330 READMEM(buf, dummy32); 331 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 332 return status; 333 iattr->ia_valid |= ATTR_GID; 334 } 335 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 336 READ_BUF(4); 337 len += 4; 338 READ32(dummy32); 339 switch (dummy32) { 340 case NFS4_SET_TO_CLIENT_TIME: 341 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 342 all 32 bits of 'nseconds'. */ 343 READ_BUF(12); 344 len += 12; 345 READ32(dummy32); 346 if (dummy32) 347 return nfserr_inval; 348 READ32(iattr->ia_atime.tv_sec); 349 READ32(iattr->ia_atime.tv_nsec); 350 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 351 return nfserr_inval; 352 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 353 break; 354 case NFS4_SET_TO_SERVER_TIME: 355 iattr->ia_valid |= ATTR_ATIME; 356 break; 357 default: 358 goto xdr_error; 359 } 360 } 361 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 362 READ_BUF(4); 363 len += 4; 364 READ32(dummy32); 365 switch (dummy32) { 366 case NFS4_SET_TO_CLIENT_TIME: 367 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 368 all 32 bits of 'nseconds'. */ 369 READ_BUF(12); 370 len += 12; 371 READ32(dummy32); 372 if (dummy32) 373 return nfserr_inval; 374 READ32(iattr->ia_mtime.tv_sec); 375 READ32(iattr->ia_mtime.tv_nsec); 376 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 377 return nfserr_inval; 378 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 379 break; 380 case NFS4_SET_TO_SERVER_TIME: 381 iattr->ia_valid |= ATTR_MTIME; 382 break; 383 default: 384 goto xdr_error; 385 } 386 } 387 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 388 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 389 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 390 READ_BUF(expected_len - len); 391 else if (len != expected_len) 392 goto xdr_error; 393 394 DECODE_TAIL; 395 396 out_nfserr: 397 status = nfserrno(host_err); 398 goto out; 399 } 400 401 static __be32 402 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 403 { 404 DECODE_HEAD; 405 406 READ_BUF(sizeof(stateid_t)); 407 READ32(sid->si_generation); 408 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 409 410 DECODE_TAIL; 411 } 412 413 static __be32 414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 415 { 416 DECODE_HEAD; 417 418 READ_BUF(4); 419 READ32(access->ac_req_access); 420 421 DECODE_TAIL; 422 } 423 424 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 425 { 426 DECODE_HEAD; 427 428 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 429 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 430 READ32(bcts->dir); 431 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 432 * could help us figure out we should be using it. */ 433 DECODE_TAIL; 434 } 435 436 static __be32 437 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 438 { 439 DECODE_HEAD; 440 441 close->cl_stateowner = NULL; 442 READ_BUF(4); 443 READ32(close->cl_seqid); 444 return nfsd4_decode_stateid(argp, &close->cl_stateid); 445 446 DECODE_TAIL; 447 } 448 449 450 static __be32 451 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 452 { 453 DECODE_HEAD; 454 455 READ_BUF(12); 456 READ64(commit->co_offset); 457 READ32(commit->co_count); 458 459 DECODE_TAIL; 460 } 461 462 static __be32 463 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 464 { 465 DECODE_HEAD; 466 467 READ_BUF(4); 468 READ32(create->cr_type); 469 switch (create->cr_type) { 470 case NF4LNK: 471 READ_BUF(4); 472 READ32(create->cr_linklen); 473 READ_BUF(create->cr_linklen); 474 SAVEMEM(create->cr_linkname, create->cr_linklen); 475 break; 476 case NF4BLK: 477 case NF4CHR: 478 READ_BUF(8); 479 READ32(create->cr_specdata1); 480 READ32(create->cr_specdata2); 481 break; 482 case NF4SOCK: 483 case NF4FIFO: 484 case NF4DIR: 485 default: 486 break; 487 } 488 489 READ_BUF(4); 490 READ32(create->cr_namelen); 491 READ_BUF(create->cr_namelen); 492 SAVEMEM(create->cr_name, create->cr_namelen); 493 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 494 return status; 495 496 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 497 &create->cr_acl); 498 if (status) 499 goto out; 500 501 DECODE_TAIL; 502 } 503 504 static inline __be32 505 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 506 { 507 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 508 } 509 510 static inline __be32 511 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 512 { 513 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 514 } 515 516 static __be32 517 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 518 { 519 DECODE_HEAD; 520 521 READ_BUF(4); 522 READ32(link->li_namelen); 523 READ_BUF(link->li_namelen); 524 SAVEMEM(link->li_name, link->li_namelen); 525 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 526 return status; 527 528 DECODE_TAIL; 529 } 530 531 static __be32 532 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 533 { 534 DECODE_HEAD; 535 536 lock->lk_replay_owner = NULL; 537 /* 538 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 539 */ 540 READ_BUF(28); 541 READ32(lock->lk_type); 542 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 543 goto xdr_error; 544 READ32(lock->lk_reclaim); 545 READ64(lock->lk_offset); 546 READ64(lock->lk_length); 547 READ32(lock->lk_is_new); 548 549 if (lock->lk_is_new) { 550 READ_BUF(4); 551 READ32(lock->lk_new_open_seqid); 552 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 553 if (status) 554 return status; 555 READ_BUF(8 + sizeof(clientid_t)); 556 READ32(lock->lk_new_lock_seqid); 557 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 558 READ32(lock->lk_new_owner.len); 559 READ_BUF(lock->lk_new_owner.len); 560 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 561 } else { 562 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 563 if (status) 564 return status; 565 READ_BUF(4); 566 READ32(lock->lk_old_lock_seqid); 567 } 568 569 DECODE_TAIL; 570 } 571 572 static __be32 573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 574 { 575 DECODE_HEAD; 576 577 READ_BUF(32); 578 READ32(lockt->lt_type); 579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 580 goto xdr_error; 581 READ64(lockt->lt_offset); 582 READ64(lockt->lt_length); 583 COPYMEM(&lockt->lt_clientid, 8); 584 READ32(lockt->lt_owner.len); 585 READ_BUF(lockt->lt_owner.len); 586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 587 588 DECODE_TAIL; 589 } 590 591 static __be32 592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 593 { 594 DECODE_HEAD; 595 596 locku->lu_stateowner = NULL; 597 READ_BUF(8); 598 READ32(locku->lu_type); 599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 600 goto xdr_error; 601 READ32(locku->lu_seqid); 602 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 603 if (status) 604 return status; 605 READ_BUF(16); 606 READ64(locku->lu_offset); 607 READ64(locku->lu_length); 608 609 DECODE_TAIL; 610 } 611 612 static __be32 613 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 614 { 615 DECODE_HEAD; 616 617 READ_BUF(4); 618 READ32(lookup->lo_len); 619 READ_BUF(lookup->lo_len); 620 SAVEMEM(lookup->lo_name, lookup->lo_len); 621 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 622 return status; 623 624 DECODE_TAIL; 625 } 626 627 static __be32 628 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 629 { 630 DECODE_HEAD; 631 632 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 633 open->op_iattr.ia_valid = 0; 634 open->op_stateowner = NULL; 635 636 /* seqid, share_access, share_deny, clientid, ownerlen */ 637 READ_BUF(16 + sizeof(clientid_t)); 638 READ32(open->op_seqid); 639 READ32(open->op_share_access); 640 READ32(open->op_share_deny); 641 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 642 READ32(open->op_owner.len); 643 644 /* owner, open_flag */ 645 READ_BUF(open->op_owner.len + 4); 646 SAVEMEM(open->op_owner.data, open->op_owner.len); 647 READ32(open->op_create); 648 switch (open->op_create) { 649 case NFS4_OPEN_NOCREATE: 650 break; 651 case NFS4_OPEN_CREATE: 652 READ_BUF(4); 653 READ32(open->op_createmode); 654 switch (open->op_createmode) { 655 case NFS4_CREATE_UNCHECKED: 656 case NFS4_CREATE_GUARDED: 657 status = nfsd4_decode_fattr(argp, open->op_bmval, 658 &open->op_iattr, &open->op_acl); 659 if (status) 660 goto out; 661 break; 662 case NFS4_CREATE_EXCLUSIVE: 663 READ_BUF(8); 664 COPYMEM(open->op_verf.data, 8); 665 break; 666 case NFS4_CREATE_EXCLUSIVE4_1: 667 if (argp->minorversion < 1) 668 goto xdr_error; 669 READ_BUF(8); 670 COPYMEM(open->op_verf.data, 8); 671 status = nfsd4_decode_fattr(argp, open->op_bmval, 672 &open->op_iattr, &open->op_acl); 673 if (status) 674 goto out; 675 break; 676 default: 677 goto xdr_error; 678 } 679 break; 680 default: 681 goto xdr_error; 682 } 683 684 /* open_claim */ 685 READ_BUF(4); 686 READ32(open->op_claim_type); 687 switch (open->op_claim_type) { 688 case NFS4_OPEN_CLAIM_NULL: 689 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 690 READ_BUF(4); 691 READ32(open->op_fname.len); 692 READ_BUF(open->op_fname.len); 693 SAVEMEM(open->op_fname.data, open->op_fname.len); 694 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 695 return status; 696 break; 697 case NFS4_OPEN_CLAIM_PREVIOUS: 698 READ_BUF(4); 699 READ32(open->op_delegate_type); 700 break; 701 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 702 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 703 if (status) 704 return status; 705 READ_BUF(4); 706 READ32(open->op_fname.len); 707 READ_BUF(open->op_fname.len); 708 SAVEMEM(open->op_fname.data, open->op_fname.len); 709 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 710 return status; 711 break; 712 default: 713 goto xdr_error; 714 } 715 716 DECODE_TAIL; 717 } 718 719 static __be32 720 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 721 { 722 DECODE_HEAD; 723 724 open_conf->oc_stateowner = NULL; 725 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 726 if (status) 727 return status; 728 READ_BUF(4); 729 READ32(open_conf->oc_seqid); 730 731 DECODE_TAIL; 732 } 733 734 static __be32 735 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 736 { 737 DECODE_HEAD; 738 739 open_down->od_stateowner = NULL; 740 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 741 if (status) 742 return status; 743 READ_BUF(12); 744 READ32(open_down->od_seqid); 745 READ32(open_down->od_share_access); 746 READ32(open_down->od_share_deny); 747 748 DECODE_TAIL; 749 } 750 751 static __be32 752 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 753 { 754 DECODE_HEAD; 755 756 READ_BUF(4); 757 READ32(putfh->pf_fhlen); 758 if (putfh->pf_fhlen > NFS4_FHSIZE) 759 goto xdr_error; 760 READ_BUF(putfh->pf_fhlen); 761 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 762 763 DECODE_TAIL; 764 } 765 766 static __be32 767 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 768 { 769 DECODE_HEAD; 770 771 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 772 if (status) 773 return status; 774 READ_BUF(12); 775 READ64(read->rd_offset); 776 READ32(read->rd_length); 777 778 DECODE_TAIL; 779 } 780 781 static __be32 782 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 783 { 784 DECODE_HEAD; 785 786 READ_BUF(24); 787 READ64(readdir->rd_cookie); 788 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 789 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 790 READ32(readdir->rd_maxcount); 791 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 792 goto out; 793 794 DECODE_TAIL; 795 } 796 797 static __be32 798 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 799 { 800 DECODE_HEAD; 801 802 READ_BUF(4); 803 READ32(remove->rm_namelen); 804 READ_BUF(remove->rm_namelen); 805 SAVEMEM(remove->rm_name, remove->rm_namelen); 806 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 807 return status; 808 809 DECODE_TAIL; 810 } 811 812 static __be32 813 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 814 { 815 DECODE_HEAD; 816 817 READ_BUF(4); 818 READ32(rename->rn_snamelen); 819 READ_BUF(rename->rn_snamelen + 4); 820 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 821 READ32(rename->rn_tnamelen); 822 READ_BUF(rename->rn_tnamelen); 823 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 824 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 825 return status; 826 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 827 return status; 828 829 DECODE_TAIL; 830 } 831 832 static __be32 833 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 834 { 835 DECODE_HEAD; 836 837 READ_BUF(sizeof(clientid_t)); 838 COPYMEM(clientid, sizeof(clientid_t)); 839 840 DECODE_TAIL; 841 } 842 843 static __be32 844 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 845 struct nfsd4_secinfo *secinfo) 846 { 847 DECODE_HEAD; 848 849 READ_BUF(4); 850 READ32(secinfo->si_namelen); 851 READ_BUF(secinfo->si_namelen); 852 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 853 status = check_filename(secinfo->si_name, secinfo->si_namelen, 854 nfserr_noent); 855 if (status) 856 return status; 857 DECODE_TAIL; 858 } 859 860 static __be32 861 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 862 struct nfsd4_secinfo_no_name *sin) 863 { 864 DECODE_HEAD; 865 866 READ_BUF(4); 867 READ32(sin->sin_style); 868 DECODE_TAIL; 869 } 870 871 static __be32 872 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 873 { 874 __be32 status; 875 876 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 877 if (status) 878 return status; 879 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 880 &setattr->sa_acl); 881 } 882 883 static __be32 884 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 885 { 886 DECODE_HEAD; 887 888 READ_BUF(12); 889 COPYMEM(setclientid->se_verf.data, 8); 890 READ32(setclientid->se_namelen); 891 892 READ_BUF(setclientid->se_namelen + 8); 893 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 894 READ32(setclientid->se_callback_prog); 895 READ32(setclientid->se_callback_netid_len); 896 897 READ_BUF(setclientid->se_callback_netid_len + 4); 898 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 899 READ32(setclientid->se_callback_addr_len); 900 901 READ_BUF(setclientid->se_callback_addr_len + 4); 902 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 903 READ32(setclientid->se_callback_ident); 904 905 DECODE_TAIL; 906 } 907 908 static __be32 909 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 910 { 911 DECODE_HEAD; 912 913 READ_BUF(8 + sizeof(nfs4_verifier)); 914 COPYMEM(&scd_c->sc_clientid, 8); 915 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 916 917 DECODE_TAIL; 918 } 919 920 /* Also used for NVERIFY */ 921 static __be32 922 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 923 { 924 #if 0 925 struct nfsd4_compoundargs save = { 926 .p = argp->p, 927 .end = argp->end, 928 .rqstp = argp->rqstp, 929 }; 930 u32 ve_bmval[2]; 931 struct iattr ve_iattr; /* request */ 932 struct nfs4_acl *ve_acl; /* request */ 933 #endif 934 DECODE_HEAD; 935 936 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 937 goto out; 938 939 /* For convenience's sake, we compare raw xdr'd attributes in 940 * nfsd4_proc_verify; however we still decode here just to return 941 * correct error in case of bad xdr. */ 942 #if 0 943 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 944 if (status == nfserr_inval) { 945 status = nfserrno(status); 946 goto out; 947 } 948 #endif 949 READ_BUF(4); 950 READ32(verify->ve_attrlen); 951 READ_BUF(verify->ve_attrlen); 952 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 953 954 DECODE_TAIL; 955 } 956 957 static __be32 958 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 959 { 960 int avail; 961 int v; 962 int len; 963 DECODE_HEAD; 964 965 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 966 if (status) 967 return status; 968 READ_BUF(16); 969 READ64(write->wr_offset); 970 READ32(write->wr_stable_how); 971 if (write->wr_stable_how > 2) 972 goto xdr_error; 973 READ32(write->wr_buflen); 974 975 /* Sorry .. no magic macros for this.. * 976 * READ_BUF(write->wr_buflen); 977 * SAVEMEM(write->wr_buf, write->wr_buflen); 978 */ 979 avail = (char*)argp->end - (char*)argp->p; 980 if (avail + argp->pagelen < write->wr_buflen) { 981 dprintk("NFSD: xdr error (%s:%d)\n", 982 __FILE__, __LINE__); 983 goto xdr_error; 984 } 985 argp->rqstp->rq_vec[0].iov_base = p; 986 argp->rqstp->rq_vec[0].iov_len = avail; 987 v = 0; 988 len = write->wr_buflen; 989 while (len > argp->rqstp->rq_vec[v].iov_len) { 990 len -= argp->rqstp->rq_vec[v].iov_len; 991 v++; 992 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 993 argp->pagelist++; 994 if (argp->pagelen >= PAGE_SIZE) { 995 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 996 argp->pagelen -= PAGE_SIZE; 997 } else { 998 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 999 argp->pagelen -= len; 1000 } 1001 } 1002 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 1003 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 1004 argp->rqstp->rq_vec[v].iov_len = len; 1005 write->wr_vlen = v+1; 1006 1007 DECODE_TAIL; 1008 } 1009 1010 static __be32 1011 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1012 { 1013 DECODE_HEAD; 1014 1015 READ_BUF(12); 1016 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1017 READ32(rlockowner->rl_owner.len); 1018 READ_BUF(rlockowner->rl_owner.len); 1019 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1020 1021 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1022 return nfserr_inval; 1023 DECODE_TAIL; 1024 } 1025 1026 static __be32 1027 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1028 struct nfsd4_exchange_id *exid) 1029 { 1030 int dummy, tmp; 1031 DECODE_HEAD; 1032 1033 READ_BUF(NFS4_VERIFIER_SIZE); 1034 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1035 1036 READ_BUF(4); 1037 READ32(exid->clname.len); 1038 1039 READ_BUF(exid->clname.len); 1040 SAVEMEM(exid->clname.data, exid->clname.len); 1041 1042 READ_BUF(4); 1043 READ32(exid->flags); 1044 1045 /* Ignore state_protect4_a */ 1046 READ_BUF(4); 1047 READ32(exid->spa_how); 1048 switch (exid->spa_how) { 1049 case SP4_NONE: 1050 break; 1051 case SP4_MACH_CRED: 1052 /* spo_must_enforce */ 1053 READ_BUF(4); 1054 READ32(dummy); 1055 READ_BUF(dummy * 4); 1056 p += dummy; 1057 1058 /* spo_must_allow */ 1059 READ_BUF(4); 1060 READ32(dummy); 1061 READ_BUF(dummy * 4); 1062 p += dummy; 1063 break; 1064 case SP4_SSV: 1065 /* ssp_ops */ 1066 READ_BUF(4); 1067 READ32(dummy); 1068 READ_BUF(dummy * 4); 1069 p += dummy; 1070 1071 READ_BUF(4); 1072 READ32(dummy); 1073 READ_BUF(dummy * 4); 1074 p += dummy; 1075 1076 /* ssp_hash_algs<> */ 1077 READ_BUF(4); 1078 READ32(tmp); 1079 while (tmp--) { 1080 READ_BUF(4); 1081 READ32(dummy); 1082 READ_BUF(dummy); 1083 p += XDR_QUADLEN(dummy); 1084 } 1085 1086 /* ssp_encr_algs<> */ 1087 READ_BUF(4); 1088 READ32(tmp); 1089 while (tmp--) { 1090 READ_BUF(4); 1091 READ32(dummy); 1092 READ_BUF(dummy); 1093 p += XDR_QUADLEN(dummy); 1094 } 1095 1096 /* ssp_window and ssp_num_gss_handles */ 1097 READ_BUF(8); 1098 READ32(dummy); 1099 READ32(dummy); 1100 break; 1101 default: 1102 goto xdr_error; 1103 } 1104 1105 /* Ignore Implementation ID */ 1106 READ_BUF(4); /* nfs_impl_id4 array length */ 1107 READ32(dummy); 1108 1109 if (dummy > 1) 1110 goto xdr_error; 1111 1112 if (dummy == 1) { 1113 /* nii_domain */ 1114 READ_BUF(4); 1115 READ32(dummy); 1116 READ_BUF(dummy); 1117 p += XDR_QUADLEN(dummy); 1118 1119 /* nii_name */ 1120 READ_BUF(4); 1121 READ32(dummy); 1122 READ_BUF(dummy); 1123 p += XDR_QUADLEN(dummy); 1124 1125 /* nii_date */ 1126 READ_BUF(12); 1127 p += 3; 1128 } 1129 DECODE_TAIL; 1130 } 1131 1132 static __be32 1133 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1134 struct nfsd4_create_session *sess) 1135 { 1136 DECODE_HEAD; 1137 1138 u32 dummy; 1139 char *machine_name; 1140 int i; 1141 int nr_secflavs; 1142 1143 READ_BUF(16); 1144 COPYMEM(&sess->clientid, 8); 1145 READ32(sess->seqid); 1146 READ32(sess->flags); 1147 1148 /* Fore channel attrs */ 1149 READ_BUF(28); 1150 READ32(dummy); /* headerpadsz is always 0 */ 1151 READ32(sess->fore_channel.maxreq_sz); 1152 READ32(sess->fore_channel.maxresp_sz); 1153 READ32(sess->fore_channel.maxresp_cached); 1154 READ32(sess->fore_channel.maxops); 1155 READ32(sess->fore_channel.maxreqs); 1156 READ32(sess->fore_channel.nr_rdma_attrs); 1157 if (sess->fore_channel.nr_rdma_attrs == 1) { 1158 READ_BUF(4); 1159 READ32(sess->fore_channel.rdma_attrs); 1160 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1161 dprintk("Too many fore channel attr bitmaps!\n"); 1162 goto xdr_error; 1163 } 1164 1165 /* Back channel attrs */ 1166 READ_BUF(28); 1167 READ32(dummy); /* headerpadsz is always 0 */ 1168 READ32(sess->back_channel.maxreq_sz); 1169 READ32(sess->back_channel.maxresp_sz); 1170 READ32(sess->back_channel.maxresp_cached); 1171 READ32(sess->back_channel.maxops); 1172 READ32(sess->back_channel.maxreqs); 1173 READ32(sess->back_channel.nr_rdma_attrs); 1174 if (sess->back_channel.nr_rdma_attrs == 1) { 1175 READ_BUF(4); 1176 READ32(sess->back_channel.rdma_attrs); 1177 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1178 dprintk("Too many back channel attr bitmaps!\n"); 1179 goto xdr_error; 1180 } 1181 1182 READ_BUF(8); 1183 READ32(sess->callback_prog); 1184 1185 /* callback_sec_params4 */ 1186 READ32(nr_secflavs); 1187 for (i = 0; i < nr_secflavs; ++i) { 1188 READ_BUF(4); 1189 READ32(dummy); 1190 switch (dummy) { 1191 case RPC_AUTH_NULL: 1192 /* Nothing to read */ 1193 break; 1194 case RPC_AUTH_UNIX: 1195 READ_BUF(8); 1196 /* stamp */ 1197 READ32(dummy); 1198 1199 /* machine name */ 1200 READ32(dummy); 1201 READ_BUF(dummy); 1202 SAVEMEM(machine_name, dummy); 1203 1204 /* uid, gid */ 1205 READ_BUF(8); 1206 READ32(sess->uid); 1207 READ32(sess->gid); 1208 1209 /* more gids */ 1210 READ_BUF(4); 1211 READ32(dummy); 1212 READ_BUF(dummy * 4); 1213 break; 1214 case RPC_AUTH_GSS: 1215 dprintk("RPC_AUTH_GSS callback secflavor " 1216 "not supported!\n"); 1217 READ_BUF(8); 1218 /* gcbp_service */ 1219 READ32(dummy); 1220 /* gcbp_handle_from_server */ 1221 READ32(dummy); 1222 READ_BUF(dummy); 1223 p += XDR_QUADLEN(dummy); 1224 /* gcbp_handle_from_client */ 1225 READ_BUF(4); 1226 READ32(dummy); 1227 READ_BUF(dummy); 1228 break; 1229 default: 1230 dprintk("Illegal callback secflavor\n"); 1231 return nfserr_inval; 1232 } 1233 } 1234 DECODE_TAIL; 1235 } 1236 1237 static __be32 1238 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1239 struct nfsd4_destroy_session *destroy_session) 1240 { 1241 DECODE_HEAD; 1242 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1243 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1244 1245 DECODE_TAIL; 1246 } 1247 1248 static __be32 1249 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1250 struct nfsd4_sequence *seq) 1251 { 1252 DECODE_HEAD; 1253 1254 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1255 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1256 READ32(seq->seqid); 1257 READ32(seq->slotid); 1258 READ32(seq->maxslots); 1259 READ32(seq->cachethis); 1260 1261 DECODE_TAIL; 1262 } 1263 1264 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1265 { 1266 DECODE_HEAD; 1267 1268 READ_BUF(4); 1269 READ32(rc->rca_one_fs); 1270 1271 DECODE_TAIL; 1272 } 1273 1274 static __be32 1275 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1276 { 1277 return nfs_ok; 1278 } 1279 1280 static __be32 1281 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1282 { 1283 return nfserr_notsupp; 1284 } 1285 1286 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1287 1288 static nfsd4_dec nfsd4_dec_ops[] = { 1289 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1290 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1291 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1292 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1293 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1294 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1295 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1296 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1297 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1298 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1299 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1300 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1301 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1302 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1303 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1304 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1305 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1306 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1307 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1308 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1309 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1310 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1311 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1312 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1313 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1314 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1315 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1316 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1317 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1318 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1319 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1320 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1321 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1322 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1323 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1324 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1325 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1326 }; 1327 1328 static nfsd4_dec nfsd41_dec_ops[] = { 1329 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1330 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1331 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1332 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1333 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1334 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1335 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1336 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1337 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1338 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1339 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1340 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1341 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1342 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1343 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1344 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1345 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1346 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1347 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1348 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1349 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1350 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1351 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1352 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1353 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1354 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1355 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1356 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1357 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1358 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1359 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1360 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1361 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1362 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1363 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1364 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1365 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1366 1367 /* new operations for NFSv4.1 */ 1368 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1369 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1370 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1371 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1372 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1373 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1374 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1375 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1376 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1377 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1378 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1379 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1380 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1381 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1382 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1383 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1384 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1385 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1386 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1387 }; 1388 1389 struct nfsd4_minorversion_ops { 1390 nfsd4_dec *decoders; 1391 int nops; 1392 }; 1393 1394 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1395 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1396 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1397 }; 1398 1399 static __be32 1400 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1401 { 1402 DECODE_HEAD; 1403 struct nfsd4_op *op; 1404 struct nfsd4_minorversion_ops *ops; 1405 int i; 1406 1407 /* 1408 * XXX: According to spec, we should check the tag 1409 * for UTF-8 compliance. I'm postponing this for 1410 * now because it seems that some clients do use 1411 * binary tags. 1412 */ 1413 READ_BUF(4); 1414 READ32(argp->taglen); 1415 READ_BUF(argp->taglen + 8); 1416 SAVEMEM(argp->tag, argp->taglen); 1417 READ32(argp->minorversion); 1418 READ32(argp->opcnt); 1419 1420 if (argp->taglen > NFSD4_MAX_TAGLEN) 1421 goto xdr_error; 1422 if (argp->opcnt > 100) 1423 goto xdr_error; 1424 1425 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1426 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1427 if (!argp->ops) { 1428 argp->ops = argp->iops; 1429 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1430 goto xdr_error; 1431 } 1432 } 1433 1434 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1435 argp->opcnt = 0; 1436 1437 ops = &nfsd4_minorversion[argp->minorversion]; 1438 for (i = 0; i < argp->opcnt; i++) { 1439 op = &argp->ops[i]; 1440 op->replay = NULL; 1441 1442 /* 1443 * We can't use READ_BUF() here because we need to handle 1444 * a missing opcode as an OP_WRITE + 1. So we need to check 1445 * to see if we're truly at the end of our buffer or if there 1446 * is another page we need to flip to. 1447 */ 1448 1449 if (argp->p == argp->end) { 1450 if (argp->pagelen < 4) { 1451 /* There isn't an opcode still on the wire */ 1452 op->opnum = OP_WRITE + 1; 1453 op->status = nfserr_bad_xdr; 1454 argp->opcnt = i+1; 1455 break; 1456 } 1457 1458 /* 1459 * False alarm. We just hit a page boundary, but there 1460 * is still data available. Move pointer across page 1461 * boundary. *snip from READ_BUF* 1462 */ 1463 argp->p = page_address(argp->pagelist[0]); 1464 argp->pagelist++; 1465 if (argp->pagelen < PAGE_SIZE) { 1466 argp->end = argp->p + (argp->pagelen>>2); 1467 argp->pagelen = 0; 1468 } else { 1469 argp->end = argp->p + (PAGE_SIZE>>2); 1470 argp->pagelen -= PAGE_SIZE; 1471 } 1472 } 1473 op->opnum = ntohl(*argp->p++); 1474 1475 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1476 op->status = ops->decoders[op->opnum](argp, &op->u); 1477 else { 1478 op->opnum = OP_ILLEGAL; 1479 op->status = nfserr_op_illegal; 1480 } 1481 1482 if (op->status) { 1483 argp->opcnt = i+1; 1484 break; 1485 } 1486 } 1487 1488 DECODE_TAIL; 1489 } 1490 1491 #define WRITE32(n) *p++ = htonl(n) 1492 #define WRITE64(n) do { \ 1493 *p++ = htonl((u32)((n) >> 32)); \ 1494 *p++ = htonl((u32)(n)); \ 1495 } while (0) 1496 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1497 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1498 memcpy(p, ptr, nbytes); \ 1499 p += XDR_QUADLEN(nbytes); \ 1500 }} while (0) 1501 1502 static void write32(__be32 **p, u32 n) 1503 { 1504 *(*p)++ = n; 1505 } 1506 1507 static void write64(__be32 **p, u64 n) 1508 { 1509 write32(p, (u32)(n >> 32)); 1510 write32(p, (u32)n); 1511 } 1512 1513 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1514 { 1515 if (IS_I_VERSION(inode)) { 1516 write64(p, inode->i_version); 1517 } else { 1518 write32(p, stat->ctime.tv_sec); 1519 write32(p, stat->ctime.tv_nsec); 1520 } 1521 } 1522 1523 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1524 { 1525 write32(p, c->atomic); 1526 if (c->change_supported) { 1527 write64(p, c->before_change); 1528 write64(p, c->after_change); 1529 } else { 1530 write32(p, c->before_ctime_sec); 1531 write32(p, c->before_ctime_nsec); 1532 write32(p, c->after_ctime_sec); 1533 write32(p, c->after_ctime_nsec); 1534 } 1535 } 1536 1537 #define RESERVE_SPACE(nbytes) do { \ 1538 p = resp->p; \ 1539 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1540 } while (0) 1541 #define ADJUST_ARGS() resp->p = p 1542 1543 /* 1544 * Header routine to setup seqid operation replay cache 1545 */ 1546 #define ENCODE_SEQID_OP_HEAD \ 1547 __be32 *save; \ 1548 \ 1549 save = resp->p; 1550 1551 /* 1552 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1553 * is where sequence id's are incremented, and the replay cache is filled. 1554 * Note that we increment sequence id's here, at the last moment, so we're sure 1555 * we know whether the error to be returned is a sequence id mutating error. 1556 */ 1557 1558 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1559 if (seqid_mutating_err(nfserr) && stateowner) { \ 1560 stateowner->so_seqid++; \ 1561 stateowner->so_replay.rp_status = nfserr; \ 1562 stateowner->so_replay.rp_buflen = \ 1563 (((char *)(resp)->p - (char *)save)); \ 1564 memcpy(stateowner->so_replay.rp_buf, save, \ 1565 stateowner->so_replay.rp_buflen); \ 1566 } } while (0); 1567 1568 /* Encode as an array of strings the string given with components 1569 * separated @sep. 1570 */ 1571 static __be32 nfsd4_encode_components(char sep, char *components, 1572 __be32 **pp, int *buflen) 1573 { 1574 __be32 *p = *pp; 1575 __be32 *countp = p; 1576 int strlen, count=0; 1577 char *str, *end; 1578 1579 dprintk("nfsd4_encode_components(%s)\n", components); 1580 if ((*buflen -= 4) < 0) 1581 return nfserr_resource; 1582 WRITE32(0); /* We will fill this in with @count later */ 1583 end = str = components; 1584 while (*end) { 1585 for (; *end && (*end != sep); end++) 1586 ; /* Point to end of component */ 1587 strlen = end - str; 1588 if (strlen) { 1589 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1590 return nfserr_resource; 1591 WRITE32(strlen); 1592 WRITEMEM(str, strlen); 1593 count++; 1594 } 1595 else 1596 end++; 1597 str = end; 1598 } 1599 *pp = p; 1600 p = countp; 1601 WRITE32(count); 1602 return 0; 1603 } 1604 1605 /* 1606 * encode a location element of a fs_locations structure 1607 */ 1608 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1609 __be32 **pp, int *buflen) 1610 { 1611 __be32 status; 1612 __be32 *p = *pp; 1613 1614 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1615 if (status) 1616 return status; 1617 status = nfsd4_encode_components('/', location->path, &p, buflen); 1618 if (status) 1619 return status; 1620 *pp = p; 1621 return 0; 1622 } 1623 1624 /* 1625 * Return the path to an export point in the pseudo filesystem namespace 1626 * Returned string is safe to use as long as the caller holds a reference 1627 * to @exp. 1628 */ 1629 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1630 { 1631 struct svc_fh tmp_fh; 1632 char *path = NULL, *rootpath; 1633 size_t rootlen; 1634 1635 fh_init(&tmp_fh, NFS4_FHSIZE); 1636 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1637 if (*stat) 1638 return NULL; 1639 rootpath = tmp_fh.fh_export->ex_pathname; 1640 1641 path = exp->ex_pathname; 1642 1643 rootlen = strlen(rootpath); 1644 if (strncmp(path, rootpath, rootlen)) { 1645 dprintk("nfsd: fs_locations failed;" 1646 "%s is not contained in %s\n", path, rootpath); 1647 *stat = nfserr_notsupp; 1648 path = NULL; 1649 goto out; 1650 } 1651 path += rootlen; 1652 out: 1653 fh_put(&tmp_fh); 1654 return path; 1655 } 1656 1657 /* 1658 * encode a fs_locations structure 1659 */ 1660 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1661 struct svc_export *exp, 1662 __be32 **pp, int *buflen) 1663 { 1664 __be32 status; 1665 int i; 1666 __be32 *p = *pp; 1667 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1668 char *root = nfsd4_path(rqstp, exp, &status); 1669 1670 if (status) 1671 return status; 1672 status = nfsd4_encode_components('/', root, &p, buflen); 1673 if (status) 1674 return status; 1675 if ((*buflen -= 4) < 0) 1676 return nfserr_resource; 1677 WRITE32(fslocs->locations_count); 1678 for (i=0; i<fslocs->locations_count; i++) { 1679 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1680 &p, buflen); 1681 if (status) 1682 return status; 1683 } 1684 *pp = p; 1685 return 0; 1686 } 1687 1688 static u32 nfs4_ftypes[16] = { 1689 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1690 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1691 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1692 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1693 }; 1694 1695 static __be32 1696 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1697 __be32 **p, int *buflen) 1698 { 1699 int status; 1700 1701 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1702 return nfserr_resource; 1703 if (whotype != NFS4_ACL_WHO_NAMED) 1704 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1705 else if (group) 1706 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1707 else 1708 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1709 if (status < 0) 1710 return nfserrno(status); 1711 *p = xdr_encode_opaque(*p, NULL, status); 1712 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1713 BUG_ON(*buflen < 0); 1714 return 0; 1715 } 1716 1717 static inline __be32 1718 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1719 { 1720 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1721 } 1722 1723 static inline __be32 1724 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1725 { 1726 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1727 } 1728 1729 static inline __be32 1730 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1731 __be32 **p, int *buflen) 1732 { 1733 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1734 } 1735 1736 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1737 FATTR4_WORD0_RDATTR_ERROR) 1738 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1739 1740 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1741 { 1742 /* As per referral draft: */ 1743 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1744 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1745 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1746 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1747 *rdattr_err = NFSERR_MOVED; 1748 else 1749 return nfserr_moved; 1750 } 1751 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1752 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1753 return 0; 1754 } 1755 1756 /* 1757 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1758 * ourselves. 1759 * 1760 * @countp is the buffer size in _words_; upon successful return this becomes 1761 * replaced with the number of words written. 1762 */ 1763 __be32 1764 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1765 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1766 struct svc_rqst *rqstp, int ignore_crossmnt) 1767 { 1768 u32 bmval0 = bmval[0]; 1769 u32 bmval1 = bmval[1]; 1770 u32 bmval2 = bmval[2]; 1771 struct kstat stat; 1772 struct svc_fh tempfh; 1773 struct kstatfs statfs; 1774 int buflen = *countp << 2; 1775 __be32 *attrlenp; 1776 u32 dummy; 1777 u64 dummy64; 1778 u32 rdattr_err = 0; 1779 __be32 *p = buffer; 1780 __be32 status; 1781 int err; 1782 int aclsupport = 0; 1783 struct nfs4_acl *acl = NULL; 1784 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1785 u32 minorversion = resp->cstate.minorversion; 1786 struct path path = { 1787 .mnt = exp->ex_path.mnt, 1788 .dentry = dentry, 1789 }; 1790 1791 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1792 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 1793 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 1794 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 1795 1796 if (exp->ex_fslocs.migrated) { 1797 BUG_ON(bmval[2]); 1798 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1799 if (status) 1800 goto out; 1801 } 1802 1803 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1804 if (err) 1805 goto out_nfserr; 1806 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1807 FATTR4_WORD0_MAXNAME)) || 1808 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1809 FATTR4_WORD1_SPACE_TOTAL))) { 1810 err = vfs_statfs(&path, &statfs); 1811 if (err) 1812 goto out_nfserr; 1813 } 1814 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1815 fh_init(&tempfh, NFS4_FHSIZE); 1816 status = fh_compose(&tempfh, exp, dentry, NULL); 1817 if (status) 1818 goto out; 1819 fhp = &tempfh; 1820 } 1821 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1822 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1823 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1824 aclsupport = (err == 0); 1825 if (bmval0 & FATTR4_WORD0_ACL) { 1826 if (err == -EOPNOTSUPP) 1827 bmval0 &= ~FATTR4_WORD0_ACL; 1828 else if (err == -EINVAL) { 1829 status = nfserr_attrnotsupp; 1830 goto out; 1831 } else if (err != 0) 1832 goto out_nfserr; 1833 } 1834 } 1835 1836 if (bmval2) { 1837 if ((buflen -= 16) < 0) 1838 goto out_resource; 1839 WRITE32(3); 1840 WRITE32(bmval0); 1841 WRITE32(bmval1); 1842 WRITE32(bmval2); 1843 } else if (bmval1) { 1844 if ((buflen -= 12) < 0) 1845 goto out_resource; 1846 WRITE32(2); 1847 WRITE32(bmval0); 1848 WRITE32(bmval1); 1849 } else { 1850 if ((buflen -= 8) < 0) 1851 goto out_resource; 1852 WRITE32(1); 1853 WRITE32(bmval0); 1854 } 1855 attrlenp = p++; /* to be backfilled later */ 1856 1857 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1858 u32 word0 = nfsd_suppattrs0(minorversion); 1859 u32 word1 = nfsd_suppattrs1(minorversion); 1860 u32 word2 = nfsd_suppattrs2(minorversion); 1861 1862 if (!aclsupport) 1863 word0 &= ~FATTR4_WORD0_ACL; 1864 if (!word2) { 1865 if ((buflen -= 12) < 0) 1866 goto out_resource; 1867 WRITE32(2); 1868 WRITE32(word0); 1869 WRITE32(word1); 1870 } else { 1871 if ((buflen -= 16) < 0) 1872 goto out_resource; 1873 WRITE32(3); 1874 WRITE32(word0); 1875 WRITE32(word1); 1876 WRITE32(word2); 1877 } 1878 } 1879 if (bmval0 & FATTR4_WORD0_TYPE) { 1880 if ((buflen -= 4) < 0) 1881 goto out_resource; 1882 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1883 if (dummy == NF4BAD) 1884 goto out_serverfault; 1885 WRITE32(dummy); 1886 } 1887 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1888 if ((buflen -= 4) < 0) 1889 goto out_resource; 1890 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1891 WRITE32(NFS4_FH_PERSISTENT); 1892 else 1893 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1894 } 1895 if (bmval0 & FATTR4_WORD0_CHANGE) { 1896 if ((buflen -= 8) < 0) 1897 goto out_resource; 1898 write_change(&p, &stat, dentry->d_inode); 1899 } 1900 if (bmval0 & FATTR4_WORD0_SIZE) { 1901 if ((buflen -= 8) < 0) 1902 goto out_resource; 1903 WRITE64(stat.size); 1904 } 1905 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1906 if ((buflen -= 4) < 0) 1907 goto out_resource; 1908 WRITE32(1); 1909 } 1910 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1911 if ((buflen -= 4) < 0) 1912 goto out_resource; 1913 WRITE32(1); 1914 } 1915 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1916 if ((buflen -= 4) < 0) 1917 goto out_resource; 1918 WRITE32(0); 1919 } 1920 if (bmval0 & FATTR4_WORD0_FSID) { 1921 if ((buflen -= 16) < 0) 1922 goto out_resource; 1923 if (exp->ex_fslocs.migrated) { 1924 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1925 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1926 } else switch(fsid_source(fhp)) { 1927 case FSIDSOURCE_FSID: 1928 WRITE64((u64)exp->ex_fsid); 1929 WRITE64((u64)0); 1930 break; 1931 case FSIDSOURCE_DEV: 1932 WRITE32(0); 1933 WRITE32(MAJOR(stat.dev)); 1934 WRITE32(0); 1935 WRITE32(MINOR(stat.dev)); 1936 break; 1937 case FSIDSOURCE_UUID: 1938 WRITEMEM(exp->ex_uuid, 16); 1939 break; 1940 } 1941 } 1942 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1943 if ((buflen -= 4) < 0) 1944 goto out_resource; 1945 WRITE32(0); 1946 } 1947 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1948 if ((buflen -= 4) < 0) 1949 goto out_resource; 1950 WRITE32(nfsd4_lease); 1951 } 1952 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1953 if ((buflen -= 4) < 0) 1954 goto out_resource; 1955 WRITE32(rdattr_err); 1956 } 1957 if (bmval0 & FATTR4_WORD0_ACL) { 1958 struct nfs4_ace *ace; 1959 1960 if (acl == NULL) { 1961 if ((buflen -= 4) < 0) 1962 goto out_resource; 1963 1964 WRITE32(0); 1965 goto out_acl; 1966 } 1967 if ((buflen -= 4) < 0) 1968 goto out_resource; 1969 WRITE32(acl->naces); 1970 1971 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1972 if ((buflen -= 4*3) < 0) 1973 goto out_resource; 1974 WRITE32(ace->type); 1975 WRITE32(ace->flag); 1976 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1977 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1978 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1979 &p, &buflen); 1980 if (status == nfserr_resource) 1981 goto out_resource; 1982 if (status) 1983 goto out; 1984 } 1985 } 1986 out_acl: 1987 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1988 if ((buflen -= 4) < 0) 1989 goto out_resource; 1990 WRITE32(aclsupport ? 1991 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1992 } 1993 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1994 if ((buflen -= 4) < 0) 1995 goto out_resource; 1996 WRITE32(1); 1997 } 1998 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1999 if ((buflen -= 4) < 0) 2000 goto out_resource; 2001 WRITE32(1); 2002 } 2003 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2004 if ((buflen -= 4) < 0) 2005 goto out_resource; 2006 WRITE32(1); 2007 } 2008 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2009 if ((buflen -= 4) < 0) 2010 goto out_resource; 2011 WRITE32(1); 2012 } 2013 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2014 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 2015 if (buflen < 0) 2016 goto out_resource; 2017 WRITE32(fhp->fh_handle.fh_size); 2018 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 2019 } 2020 if (bmval0 & FATTR4_WORD0_FILEID) { 2021 if ((buflen -= 8) < 0) 2022 goto out_resource; 2023 WRITE64(stat.ino); 2024 } 2025 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2026 if ((buflen -= 8) < 0) 2027 goto out_resource; 2028 WRITE64((u64) statfs.f_ffree); 2029 } 2030 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2031 if ((buflen -= 8) < 0) 2032 goto out_resource; 2033 WRITE64((u64) statfs.f_ffree); 2034 } 2035 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2036 if ((buflen -= 8) < 0) 2037 goto out_resource; 2038 WRITE64((u64) statfs.f_files); 2039 } 2040 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2041 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 2042 if (status == nfserr_resource) 2043 goto out_resource; 2044 if (status) 2045 goto out; 2046 } 2047 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2048 if ((buflen -= 4) < 0) 2049 goto out_resource; 2050 WRITE32(1); 2051 } 2052 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2053 if ((buflen -= 8) < 0) 2054 goto out_resource; 2055 WRITE64(~(u64)0); 2056 } 2057 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2058 if ((buflen -= 4) < 0) 2059 goto out_resource; 2060 WRITE32(255); 2061 } 2062 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2063 if ((buflen -= 4) < 0) 2064 goto out_resource; 2065 WRITE32(statfs.f_namelen); 2066 } 2067 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2068 if ((buflen -= 8) < 0) 2069 goto out_resource; 2070 WRITE64((u64) svc_max_payload(rqstp)); 2071 } 2072 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2073 if ((buflen -= 8) < 0) 2074 goto out_resource; 2075 WRITE64((u64) svc_max_payload(rqstp)); 2076 } 2077 if (bmval1 & FATTR4_WORD1_MODE) { 2078 if ((buflen -= 4) < 0) 2079 goto out_resource; 2080 WRITE32(stat.mode & S_IALLUGO); 2081 } 2082 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2083 if ((buflen -= 4) < 0) 2084 goto out_resource; 2085 WRITE32(1); 2086 } 2087 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2088 if ((buflen -= 4) < 0) 2089 goto out_resource; 2090 WRITE32(stat.nlink); 2091 } 2092 if (bmval1 & FATTR4_WORD1_OWNER) { 2093 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2094 if (status == nfserr_resource) 2095 goto out_resource; 2096 if (status) 2097 goto out; 2098 } 2099 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2100 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2101 if (status == nfserr_resource) 2102 goto out_resource; 2103 if (status) 2104 goto out; 2105 } 2106 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2107 if ((buflen -= 8) < 0) 2108 goto out_resource; 2109 WRITE32((u32) MAJOR(stat.rdev)); 2110 WRITE32((u32) MINOR(stat.rdev)); 2111 } 2112 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2113 if ((buflen -= 8) < 0) 2114 goto out_resource; 2115 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2116 WRITE64(dummy64); 2117 } 2118 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2119 if ((buflen -= 8) < 0) 2120 goto out_resource; 2121 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2122 WRITE64(dummy64); 2123 } 2124 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2125 if ((buflen -= 8) < 0) 2126 goto out_resource; 2127 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2128 WRITE64(dummy64); 2129 } 2130 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2131 if ((buflen -= 8) < 0) 2132 goto out_resource; 2133 dummy64 = (u64)stat.blocks << 9; 2134 WRITE64(dummy64); 2135 } 2136 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2137 if ((buflen -= 12) < 0) 2138 goto out_resource; 2139 WRITE32(0); 2140 WRITE32(stat.atime.tv_sec); 2141 WRITE32(stat.atime.tv_nsec); 2142 } 2143 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2144 if ((buflen -= 12) < 0) 2145 goto out_resource; 2146 WRITE32(0); 2147 WRITE32(1); 2148 WRITE32(0); 2149 } 2150 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2151 if ((buflen -= 12) < 0) 2152 goto out_resource; 2153 WRITE32(0); 2154 WRITE32(stat.ctime.tv_sec); 2155 WRITE32(stat.ctime.tv_nsec); 2156 } 2157 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2158 if ((buflen -= 12) < 0) 2159 goto out_resource; 2160 WRITE32(0); 2161 WRITE32(stat.mtime.tv_sec); 2162 WRITE32(stat.mtime.tv_nsec); 2163 } 2164 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2165 if ((buflen -= 8) < 0) 2166 goto out_resource; 2167 /* 2168 * Get parent's attributes if not ignoring crossmount 2169 * and this is the root of a cross-mounted filesystem. 2170 */ 2171 if (ignore_crossmnt == 0 && 2172 dentry == exp->ex_path.mnt->mnt_root) { 2173 struct path path = exp->ex_path; 2174 path_get(&path); 2175 while (follow_up(&path)) { 2176 if (path.dentry != path.mnt->mnt_root) 2177 break; 2178 } 2179 err = vfs_getattr(path.mnt, path.dentry, &stat); 2180 path_put(&path); 2181 if (err) 2182 goto out_nfserr; 2183 } 2184 WRITE64(stat.ino); 2185 } 2186 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2187 WRITE32(3); 2188 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2189 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2190 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2191 } 2192 2193 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2194 *countp = p - buffer; 2195 status = nfs_ok; 2196 2197 out: 2198 kfree(acl); 2199 if (fhp == &tempfh) 2200 fh_put(&tempfh); 2201 return status; 2202 out_nfserr: 2203 status = nfserrno(err); 2204 goto out; 2205 out_resource: 2206 *countp = 0; 2207 status = nfserr_resource; 2208 goto out; 2209 out_serverfault: 2210 status = nfserr_serverfault; 2211 goto out; 2212 } 2213 2214 static inline int attributes_need_mount(u32 *bmval) 2215 { 2216 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2217 return 1; 2218 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2219 return 1; 2220 return 0; 2221 } 2222 2223 static __be32 2224 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2225 const char *name, int namlen, __be32 *p, int *buflen) 2226 { 2227 struct svc_export *exp = cd->rd_fhp->fh_export; 2228 struct dentry *dentry; 2229 __be32 nfserr; 2230 int ignore_crossmnt = 0; 2231 2232 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2233 if (IS_ERR(dentry)) 2234 return nfserrno(PTR_ERR(dentry)); 2235 if (!dentry->d_inode) { 2236 /* 2237 * nfsd_buffered_readdir drops the i_mutex between 2238 * readdir and calling this callback, leaving a window 2239 * where this directory entry could have gone away. 2240 */ 2241 dput(dentry); 2242 return nfserr_noent; 2243 } 2244 2245 exp_get(exp); 2246 /* 2247 * In the case of a mountpoint, the client may be asking for 2248 * attributes that are only properties of the underlying filesystem 2249 * as opposed to the cross-mounted file system. In such a case, 2250 * we will not follow the cross mount and will fill the attribtutes 2251 * directly from the mountpoint dentry. 2252 */ 2253 if (nfsd_mountpoint(dentry, exp)) { 2254 int err; 2255 2256 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2257 && !attributes_need_mount(cd->rd_bmval)) { 2258 ignore_crossmnt = 1; 2259 goto out_encode; 2260 } 2261 /* 2262 * Why the heck aren't we just using nfsd_lookup?? 2263 * Different "."/".." handling? Something else? 2264 * At least, add a comment here to explain.... 2265 */ 2266 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2267 if (err) { 2268 nfserr = nfserrno(err); 2269 goto out_put; 2270 } 2271 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2272 if (nfserr) 2273 goto out_put; 2274 2275 } 2276 out_encode: 2277 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2278 cd->rd_rqstp, ignore_crossmnt); 2279 out_put: 2280 dput(dentry); 2281 exp_put(exp); 2282 return nfserr; 2283 } 2284 2285 static __be32 * 2286 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2287 { 2288 __be32 *attrlenp; 2289 2290 if (buflen < 6) 2291 return NULL; 2292 *p++ = htonl(2); 2293 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2294 *p++ = htonl(0); /* bmval1 */ 2295 2296 attrlenp = p++; 2297 *p++ = nfserr; /* no htonl */ 2298 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2299 return p; 2300 } 2301 2302 static int 2303 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2304 loff_t offset, u64 ino, unsigned int d_type) 2305 { 2306 struct readdir_cd *ccd = ccdv; 2307 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2308 int buflen; 2309 __be32 *p = cd->buffer; 2310 __be32 *cookiep; 2311 __be32 nfserr = nfserr_toosmall; 2312 2313 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2314 if (name && isdotent(name, namlen)) { 2315 cd->common.err = nfs_ok; 2316 return 0; 2317 } 2318 2319 if (cd->offset) 2320 xdr_encode_hyper(cd->offset, (u64) offset); 2321 2322 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2323 if (buflen < 0) 2324 goto fail; 2325 2326 *p++ = xdr_one; /* mark entry present */ 2327 cookiep = p; 2328 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2329 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2330 2331 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2332 switch (nfserr) { 2333 case nfs_ok: 2334 p += buflen; 2335 break; 2336 case nfserr_resource: 2337 nfserr = nfserr_toosmall; 2338 goto fail; 2339 case nfserr_noent: 2340 goto skip_entry; 2341 default: 2342 /* 2343 * If the client requested the RDATTR_ERROR attribute, 2344 * we stuff the error code into this attribute 2345 * and continue. If this attribute was not requested, 2346 * then in accordance with the spec, we fail the 2347 * entire READDIR operation(!) 2348 */ 2349 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2350 goto fail; 2351 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2352 if (p == NULL) { 2353 nfserr = nfserr_toosmall; 2354 goto fail; 2355 } 2356 } 2357 cd->buflen -= (p - cd->buffer); 2358 cd->buffer = p; 2359 cd->offset = cookiep; 2360 skip_entry: 2361 cd->common.err = nfs_ok; 2362 return 0; 2363 fail: 2364 cd->common.err = nfserr; 2365 return -EINVAL; 2366 } 2367 2368 static void 2369 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2370 { 2371 __be32 *p; 2372 2373 RESERVE_SPACE(sizeof(stateid_t)); 2374 WRITE32(sid->si_generation); 2375 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2376 ADJUST_ARGS(); 2377 } 2378 2379 static __be32 2380 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2381 { 2382 __be32 *p; 2383 2384 if (!nfserr) { 2385 RESERVE_SPACE(8); 2386 WRITE32(access->ac_supported); 2387 WRITE32(access->ac_resp_access); 2388 ADJUST_ARGS(); 2389 } 2390 return nfserr; 2391 } 2392 2393 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2394 { 2395 __be32 *p; 2396 2397 if (!nfserr) { 2398 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); 2399 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2400 WRITE32(bcts->dir); 2401 /* XXX: ? */ 2402 WRITE32(0); 2403 ADJUST_ARGS(); 2404 } 2405 return nfserr; 2406 } 2407 2408 static __be32 2409 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2410 { 2411 ENCODE_SEQID_OP_HEAD; 2412 2413 if (!nfserr) 2414 nfsd4_encode_stateid(resp, &close->cl_stateid); 2415 2416 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2417 return nfserr; 2418 } 2419 2420 2421 static __be32 2422 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2423 { 2424 __be32 *p; 2425 2426 if (!nfserr) { 2427 RESERVE_SPACE(8); 2428 WRITEMEM(commit->co_verf.data, 8); 2429 ADJUST_ARGS(); 2430 } 2431 return nfserr; 2432 } 2433 2434 static __be32 2435 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2436 { 2437 __be32 *p; 2438 2439 if (!nfserr) { 2440 RESERVE_SPACE(32); 2441 write_cinfo(&p, &create->cr_cinfo); 2442 WRITE32(2); 2443 WRITE32(create->cr_bmval[0]); 2444 WRITE32(create->cr_bmval[1]); 2445 ADJUST_ARGS(); 2446 } 2447 return nfserr; 2448 } 2449 2450 static __be32 2451 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2452 { 2453 struct svc_fh *fhp = getattr->ga_fhp; 2454 int buflen; 2455 2456 if (nfserr) 2457 return nfserr; 2458 2459 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2460 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2461 resp->p, &buflen, getattr->ga_bmval, 2462 resp->rqstp, 0); 2463 if (!nfserr) 2464 resp->p += buflen; 2465 return nfserr; 2466 } 2467 2468 static __be32 2469 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2470 { 2471 struct svc_fh *fhp = *fhpp; 2472 unsigned int len; 2473 __be32 *p; 2474 2475 if (!nfserr) { 2476 len = fhp->fh_handle.fh_size; 2477 RESERVE_SPACE(len + 4); 2478 WRITE32(len); 2479 WRITEMEM(&fhp->fh_handle.fh_base, len); 2480 ADJUST_ARGS(); 2481 } 2482 return nfserr; 2483 } 2484 2485 /* 2486 * Including all fields other than the name, a LOCK4denied structure requires 2487 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2488 */ 2489 static void 2490 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2491 { 2492 __be32 *p; 2493 2494 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2495 WRITE64(ld->ld_start); 2496 WRITE64(ld->ld_length); 2497 WRITE32(ld->ld_type); 2498 if (ld->ld_sop) { 2499 WRITEMEM(&ld->ld_clientid, 8); 2500 WRITE32(ld->ld_sop->so_owner.len); 2501 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2502 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2503 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2504 WRITE64((u64)0); /* clientid */ 2505 WRITE32(0); /* length of owner name */ 2506 } 2507 ADJUST_ARGS(); 2508 } 2509 2510 static __be32 2511 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2512 { 2513 ENCODE_SEQID_OP_HEAD; 2514 2515 if (!nfserr) 2516 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2517 else if (nfserr == nfserr_denied) 2518 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2519 2520 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2521 return nfserr; 2522 } 2523 2524 static __be32 2525 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2526 { 2527 if (nfserr == nfserr_denied) 2528 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2529 return nfserr; 2530 } 2531 2532 static __be32 2533 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2534 { 2535 ENCODE_SEQID_OP_HEAD; 2536 2537 if (!nfserr) 2538 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2539 2540 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2541 return nfserr; 2542 } 2543 2544 2545 static __be32 2546 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2547 { 2548 __be32 *p; 2549 2550 if (!nfserr) { 2551 RESERVE_SPACE(20); 2552 write_cinfo(&p, &link->li_cinfo); 2553 ADJUST_ARGS(); 2554 } 2555 return nfserr; 2556 } 2557 2558 2559 static __be32 2560 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2561 { 2562 __be32 *p; 2563 ENCODE_SEQID_OP_HEAD; 2564 2565 if (nfserr) 2566 goto out; 2567 2568 nfsd4_encode_stateid(resp, &open->op_stateid); 2569 RESERVE_SPACE(40); 2570 write_cinfo(&p, &open->op_cinfo); 2571 WRITE32(open->op_rflags); 2572 WRITE32(2); 2573 WRITE32(open->op_bmval[0]); 2574 WRITE32(open->op_bmval[1]); 2575 WRITE32(open->op_delegate_type); 2576 ADJUST_ARGS(); 2577 2578 switch (open->op_delegate_type) { 2579 case NFS4_OPEN_DELEGATE_NONE: 2580 break; 2581 case NFS4_OPEN_DELEGATE_READ: 2582 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2583 RESERVE_SPACE(20); 2584 WRITE32(open->op_recall); 2585 2586 /* 2587 * TODO: ACE's in delegations 2588 */ 2589 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2590 WRITE32(0); 2591 WRITE32(0); 2592 WRITE32(0); /* XXX: is NULL principal ok? */ 2593 ADJUST_ARGS(); 2594 break; 2595 case NFS4_OPEN_DELEGATE_WRITE: 2596 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2597 RESERVE_SPACE(32); 2598 WRITE32(0); 2599 2600 /* 2601 * TODO: space_limit's in delegations 2602 */ 2603 WRITE32(NFS4_LIMIT_SIZE); 2604 WRITE32(~(u32)0); 2605 WRITE32(~(u32)0); 2606 2607 /* 2608 * TODO: ACE's in delegations 2609 */ 2610 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2611 WRITE32(0); 2612 WRITE32(0); 2613 WRITE32(0); /* XXX: is NULL principal ok? */ 2614 ADJUST_ARGS(); 2615 break; 2616 default: 2617 BUG(); 2618 } 2619 /* XXX save filehandle here */ 2620 out: 2621 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2622 return nfserr; 2623 } 2624 2625 static __be32 2626 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2627 { 2628 ENCODE_SEQID_OP_HEAD; 2629 2630 if (!nfserr) 2631 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2632 2633 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2634 return nfserr; 2635 } 2636 2637 static __be32 2638 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2639 { 2640 ENCODE_SEQID_OP_HEAD; 2641 2642 if (!nfserr) 2643 nfsd4_encode_stateid(resp, &od->od_stateid); 2644 2645 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2646 return nfserr; 2647 } 2648 2649 static __be32 2650 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2651 struct nfsd4_read *read) 2652 { 2653 u32 eof; 2654 int v, pn; 2655 unsigned long maxcount; 2656 long len; 2657 __be32 *p; 2658 2659 if (nfserr) 2660 return nfserr; 2661 if (resp->xbuf->page_len) 2662 return nfserr_resource; 2663 2664 RESERVE_SPACE(8); /* eof flag and byte count */ 2665 2666 maxcount = svc_max_payload(resp->rqstp); 2667 if (maxcount > read->rd_length) 2668 maxcount = read->rd_length; 2669 2670 len = maxcount; 2671 v = 0; 2672 while (len > 0) { 2673 pn = resp->rqstp->rq_resused++; 2674 resp->rqstp->rq_vec[v].iov_base = 2675 page_address(resp->rqstp->rq_respages[pn]); 2676 resp->rqstp->rq_vec[v].iov_len = 2677 len < PAGE_SIZE ? len : PAGE_SIZE; 2678 v++; 2679 len -= PAGE_SIZE; 2680 } 2681 read->rd_vlen = v; 2682 2683 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2684 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2685 &maxcount); 2686 2687 if (nfserr == nfserr_symlink) 2688 nfserr = nfserr_inval; 2689 if (nfserr) 2690 return nfserr; 2691 eof = (read->rd_offset + maxcount >= 2692 read->rd_fhp->fh_dentry->d_inode->i_size); 2693 2694 WRITE32(eof); 2695 WRITE32(maxcount); 2696 ADJUST_ARGS(); 2697 resp->xbuf->head[0].iov_len = (char*)p 2698 - (char*)resp->xbuf->head[0].iov_base; 2699 resp->xbuf->page_len = maxcount; 2700 2701 /* Use rest of head for padding and remaining ops: */ 2702 resp->xbuf->tail[0].iov_base = p; 2703 resp->xbuf->tail[0].iov_len = 0; 2704 if (maxcount&3) { 2705 RESERVE_SPACE(4); 2706 WRITE32(0); 2707 resp->xbuf->tail[0].iov_base += maxcount&3; 2708 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2709 ADJUST_ARGS(); 2710 } 2711 return 0; 2712 } 2713 2714 static __be32 2715 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2716 { 2717 int maxcount; 2718 char *page; 2719 __be32 *p; 2720 2721 if (nfserr) 2722 return nfserr; 2723 if (resp->xbuf->page_len) 2724 return nfserr_resource; 2725 2726 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2727 2728 maxcount = PAGE_SIZE; 2729 RESERVE_SPACE(4); 2730 2731 /* 2732 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2733 * if they would overflow the buffer. Is this kosher in NFSv4? If 2734 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2735 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2736 */ 2737 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2738 if (nfserr == nfserr_isdir) 2739 return nfserr_inval; 2740 if (nfserr) 2741 return nfserr; 2742 2743 WRITE32(maxcount); 2744 ADJUST_ARGS(); 2745 resp->xbuf->head[0].iov_len = (char*)p 2746 - (char*)resp->xbuf->head[0].iov_base; 2747 resp->xbuf->page_len = maxcount; 2748 2749 /* Use rest of head for padding and remaining ops: */ 2750 resp->xbuf->tail[0].iov_base = p; 2751 resp->xbuf->tail[0].iov_len = 0; 2752 if (maxcount&3) { 2753 RESERVE_SPACE(4); 2754 WRITE32(0); 2755 resp->xbuf->tail[0].iov_base += maxcount&3; 2756 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2757 ADJUST_ARGS(); 2758 } 2759 return 0; 2760 } 2761 2762 static __be32 2763 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2764 { 2765 int maxcount; 2766 loff_t offset; 2767 __be32 *page, *savep, *tailbase; 2768 __be32 *p; 2769 2770 if (nfserr) 2771 return nfserr; 2772 if (resp->xbuf->page_len) 2773 return nfserr_resource; 2774 2775 RESERVE_SPACE(8); /* verifier */ 2776 savep = p; 2777 2778 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 2779 WRITE32(0); 2780 WRITE32(0); 2781 ADJUST_ARGS(); 2782 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2783 tailbase = p; 2784 2785 maxcount = PAGE_SIZE; 2786 if (maxcount > readdir->rd_maxcount) 2787 maxcount = readdir->rd_maxcount; 2788 2789 /* 2790 * Convert from bytes to words, account for the two words already 2791 * written, make sure to leave two words at the end for the next 2792 * pointer and eof field. 2793 */ 2794 maxcount = (maxcount >> 2) - 4; 2795 if (maxcount < 0) { 2796 nfserr = nfserr_toosmall; 2797 goto err_no_verf; 2798 } 2799 2800 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2801 readdir->common.err = 0; 2802 readdir->buflen = maxcount; 2803 readdir->buffer = page; 2804 readdir->offset = NULL; 2805 2806 offset = readdir->rd_cookie; 2807 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2808 &offset, 2809 &readdir->common, nfsd4_encode_dirent); 2810 if (nfserr == nfs_ok && 2811 readdir->common.err == nfserr_toosmall && 2812 readdir->buffer == page) 2813 nfserr = nfserr_toosmall; 2814 if (nfserr == nfserr_symlink) 2815 nfserr = nfserr_notdir; 2816 if (nfserr) 2817 goto err_no_verf; 2818 2819 if (readdir->offset) 2820 xdr_encode_hyper(readdir->offset, offset); 2821 2822 p = readdir->buffer; 2823 *p++ = 0; /* no more entries */ 2824 *p++ = htonl(readdir->common.err == nfserr_eof); 2825 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2826 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2827 2828 /* Use rest of head for padding and remaining ops: */ 2829 resp->xbuf->tail[0].iov_base = tailbase; 2830 resp->xbuf->tail[0].iov_len = 0; 2831 resp->p = resp->xbuf->tail[0].iov_base; 2832 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2833 2834 return 0; 2835 err_no_verf: 2836 p = savep; 2837 ADJUST_ARGS(); 2838 return nfserr; 2839 } 2840 2841 static __be32 2842 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2843 { 2844 __be32 *p; 2845 2846 if (!nfserr) { 2847 RESERVE_SPACE(20); 2848 write_cinfo(&p, &remove->rm_cinfo); 2849 ADJUST_ARGS(); 2850 } 2851 return nfserr; 2852 } 2853 2854 static __be32 2855 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2856 { 2857 __be32 *p; 2858 2859 if (!nfserr) { 2860 RESERVE_SPACE(40); 2861 write_cinfo(&p, &rename->rn_sinfo); 2862 write_cinfo(&p, &rename->rn_tinfo); 2863 ADJUST_ARGS(); 2864 } 2865 return nfserr; 2866 } 2867 2868 static __be32 2869 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, 2870 __be32 nfserr,struct svc_export *exp) 2871 { 2872 int i = 0; 2873 u32 nflavs; 2874 struct exp_flavor_info *flavs; 2875 struct exp_flavor_info def_flavs[2]; 2876 __be32 *p; 2877 2878 if (nfserr) 2879 goto out; 2880 if (exp->ex_nflavors) { 2881 flavs = exp->ex_flavors; 2882 nflavs = exp->ex_nflavors; 2883 } else { /* Handling of some defaults in absence of real secinfo: */ 2884 flavs = def_flavs; 2885 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2886 nflavs = 2; 2887 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2888 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2889 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2890 nflavs = 1; 2891 flavs[0].pseudoflavor 2892 = svcauth_gss_flavor(exp->ex_client); 2893 } else { 2894 nflavs = 1; 2895 flavs[0].pseudoflavor 2896 = exp->ex_client->flavour->flavour; 2897 } 2898 } 2899 2900 RESERVE_SPACE(4); 2901 WRITE32(nflavs); 2902 ADJUST_ARGS(); 2903 for (i = 0; i < nflavs; i++) { 2904 u32 flav = flavs[i].pseudoflavor; 2905 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2906 2907 if (gm) { 2908 RESERVE_SPACE(4); 2909 WRITE32(RPC_AUTH_GSS); 2910 ADJUST_ARGS(); 2911 RESERVE_SPACE(4 + gm->gm_oid.len); 2912 WRITE32(gm->gm_oid.len); 2913 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2914 ADJUST_ARGS(); 2915 RESERVE_SPACE(4); 2916 WRITE32(0); /* qop */ 2917 ADJUST_ARGS(); 2918 RESERVE_SPACE(4); 2919 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2920 ADJUST_ARGS(); 2921 gss_mech_put(gm); 2922 } else { 2923 RESERVE_SPACE(4); 2924 WRITE32(flav); 2925 ADJUST_ARGS(); 2926 } 2927 } 2928 out: 2929 if (exp) 2930 exp_put(exp); 2931 return nfserr; 2932 } 2933 2934 static __be32 2935 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2936 struct nfsd4_secinfo *secinfo) 2937 { 2938 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); 2939 } 2940 2941 static __be32 2942 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 2943 struct nfsd4_secinfo_no_name *secinfo) 2944 { 2945 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); 2946 } 2947 2948 /* 2949 * The SETATTR encode routine is special -- it always encodes a bitmap, 2950 * regardless of the error status. 2951 */ 2952 static __be32 2953 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2954 { 2955 __be32 *p; 2956 2957 RESERVE_SPACE(12); 2958 if (nfserr) { 2959 WRITE32(2); 2960 WRITE32(0); 2961 WRITE32(0); 2962 } 2963 else { 2964 WRITE32(2); 2965 WRITE32(setattr->sa_bmval[0]); 2966 WRITE32(setattr->sa_bmval[1]); 2967 } 2968 ADJUST_ARGS(); 2969 return nfserr; 2970 } 2971 2972 static __be32 2973 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2974 { 2975 __be32 *p; 2976 2977 if (!nfserr) { 2978 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2979 WRITEMEM(&scd->se_clientid, 8); 2980 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2981 ADJUST_ARGS(); 2982 } 2983 else if (nfserr == nfserr_clid_inuse) { 2984 RESERVE_SPACE(8); 2985 WRITE32(0); 2986 WRITE32(0); 2987 ADJUST_ARGS(); 2988 } 2989 return nfserr; 2990 } 2991 2992 static __be32 2993 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2994 { 2995 __be32 *p; 2996 2997 if (!nfserr) { 2998 RESERVE_SPACE(16); 2999 WRITE32(write->wr_bytes_written); 3000 WRITE32(write->wr_how_written); 3001 WRITEMEM(write->wr_verifier.data, 8); 3002 ADJUST_ARGS(); 3003 } 3004 return nfserr; 3005 } 3006 3007 static __be32 3008 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 3009 struct nfsd4_exchange_id *exid) 3010 { 3011 __be32 *p; 3012 char *major_id; 3013 char *server_scope; 3014 int major_id_sz; 3015 int server_scope_sz; 3016 uint64_t minor_id = 0; 3017 3018 if (nfserr) 3019 return nfserr; 3020 3021 major_id = utsname()->nodename; 3022 major_id_sz = strlen(major_id); 3023 server_scope = utsname()->nodename; 3024 server_scope_sz = strlen(server_scope); 3025 3026 RESERVE_SPACE( 3027 8 /* eir_clientid */ + 3028 4 /* eir_sequenceid */ + 3029 4 /* eir_flags */ + 3030 4 /* spr_how (SP4_NONE) */ + 3031 8 /* so_minor_id */ + 3032 4 /* so_major_id.len */ + 3033 (XDR_QUADLEN(major_id_sz) * 4) + 3034 4 /* eir_server_scope.len */ + 3035 (XDR_QUADLEN(server_scope_sz) * 4) + 3036 4 /* eir_server_impl_id.count (0) */); 3037 3038 WRITEMEM(&exid->clientid, 8); 3039 WRITE32(exid->seqid); 3040 WRITE32(exid->flags); 3041 3042 /* state_protect4_r. Currently only support SP4_NONE */ 3043 BUG_ON(exid->spa_how != SP4_NONE); 3044 WRITE32(exid->spa_how); 3045 3046 /* The server_owner struct */ 3047 WRITE64(minor_id); /* Minor id */ 3048 /* major id */ 3049 WRITE32(major_id_sz); 3050 WRITEMEM(major_id, major_id_sz); 3051 3052 /* Server scope */ 3053 WRITE32(server_scope_sz); 3054 WRITEMEM(server_scope, server_scope_sz); 3055 3056 /* Implementation id */ 3057 WRITE32(0); /* zero length nfs_impl_id4 array */ 3058 ADJUST_ARGS(); 3059 return 0; 3060 } 3061 3062 static __be32 3063 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 3064 struct nfsd4_create_session *sess) 3065 { 3066 __be32 *p; 3067 3068 if (nfserr) 3069 return nfserr; 3070 3071 RESERVE_SPACE(24); 3072 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3073 WRITE32(sess->seqid); 3074 WRITE32(sess->flags); 3075 ADJUST_ARGS(); 3076 3077 RESERVE_SPACE(28); 3078 WRITE32(0); /* headerpadsz */ 3079 WRITE32(sess->fore_channel.maxreq_sz); 3080 WRITE32(sess->fore_channel.maxresp_sz); 3081 WRITE32(sess->fore_channel.maxresp_cached); 3082 WRITE32(sess->fore_channel.maxops); 3083 WRITE32(sess->fore_channel.maxreqs); 3084 WRITE32(sess->fore_channel.nr_rdma_attrs); 3085 ADJUST_ARGS(); 3086 3087 if (sess->fore_channel.nr_rdma_attrs) { 3088 RESERVE_SPACE(4); 3089 WRITE32(sess->fore_channel.rdma_attrs); 3090 ADJUST_ARGS(); 3091 } 3092 3093 RESERVE_SPACE(28); 3094 WRITE32(0); /* headerpadsz */ 3095 WRITE32(sess->back_channel.maxreq_sz); 3096 WRITE32(sess->back_channel.maxresp_sz); 3097 WRITE32(sess->back_channel.maxresp_cached); 3098 WRITE32(sess->back_channel.maxops); 3099 WRITE32(sess->back_channel.maxreqs); 3100 WRITE32(sess->back_channel.nr_rdma_attrs); 3101 ADJUST_ARGS(); 3102 3103 if (sess->back_channel.nr_rdma_attrs) { 3104 RESERVE_SPACE(4); 3105 WRITE32(sess->back_channel.rdma_attrs); 3106 ADJUST_ARGS(); 3107 } 3108 return 0; 3109 } 3110 3111 static __be32 3112 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3113 struct nfsd4_destroy_session *destroy_session) 3114 { 3115 return nfserr; 3116 } 3117 3118 static __be32 3119 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3120 struct nfsd4_sequence *seq) 3121 { 3122 __be32 *p; 3123 3124 if (nfserr) 3125 return nfserr; 3126 3127 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3128 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3129 WRITE32(seq->seqid); 3130 WRITE32(seq->slotid); 3131 WRITE32(seq->maxslots); 3132 /* For now: target_maxslots = maxslots */ 3133 WRITE32(seq->maxslots); 3134 WRITE32(seq->status_flags); 3135 3136 ADJUST_ARGS(); 3137 resp->cstate.datap = p; /* DRC cache data pointer */ 3138 return 0; 3139 } 3140 3141 static __be32 3142 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3143 { 3144 return nfserr; 3145 } 3146 3147 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3148 3149 /* 3150 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3151 * since we don't need to filter out obsolete ops as this is 3152 * done in the decoding phase. 3153 */ 3154 static nfsd4_enc nfsd4_enc_ops[] = { 3155 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3156 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3157 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3158 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3159 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3160 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3161 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3162 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3163 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3164 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3165 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3166 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3167 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3168 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3169 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3170 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3171 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3172 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3173 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3174 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3175 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3176 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3177 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3178 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3179 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3180 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3181 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3182 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3183 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3184 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3185 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3186 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3187 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3188 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3189 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3190 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3191 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3192 3193 /* NFSv4.1 operations */ 3194 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3195 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 3196 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3197 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3198 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3199 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3200 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3201 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3202 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3203 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3204 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3205 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3206 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 3207 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3208 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3209 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3210 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3211 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3212 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3213 }; 3214 3215 /* 3216 * Calculate the total amount of memory that the compound response has taken 3217 * after encoding the current operation. 3218 * 3219 * pad: add on 8 bytes for the next operation's op_code and status so that 3220 * there is room to cache a failure on the next operation. 3221 * 3222 * Compare this length to the session se_fmaxresp_cached. 3223 * 3224 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3225 * will be at least a page and will therefore hold the xdr_buf head. 3226 */ 3227 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) 3228 { 3229 int status = 0; 3230 struct xdr_buf *xb = &resp->rqstp->rq_res; 3231 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; 3232 struct nfsd4_session *session = NULL; 3233 struct nfsd4_slot *slot = resp->cstate.slot; 3234 u32 length, tlen = 0, pad = 8; 3235 3236 if (!nfsd4_has_session(&resp->cstate)) 3237 return status; 3238 3239 session = resp->cstate.session; 3240 if (session == NULL || slot->sl_cachethis == 0) 3241 return status; 3242 3243 if (resp->opcnt >= args->opcnt) 3244 pad = 0; /* this is the last operation */ 3245 3246 if (xb->page_len == 0) { 3247 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3248 } else { 3249 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3250 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3251 3252 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3253 } 3254 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3255 length, xb->page_len, tlen, pad); 3256 3257 if (length <= session->se_fchannel.maxresp_cached) 3258 return status; 3259 else 3260 return nfserr_rep_too_big_to_cache; 3261 } 3262 3263 void 3264 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3265 { 3266 __be32 *statp; 3267 __be32 *p; 3268 3269 RESERVE_SPACE(8); 3270 WRITE32(op->opnum); 3271 statp = p++; /* to be backfilled at the end */ 3272 ADJUST_ARGS(); 3273 3274 if (op->opnum == OP_ILLEGAL) 3275 goto status; 3276 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3277 !nfsd4_enc_ops[op->opnum]); 3278 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3279 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3280 if (!op->status && nfsd4_check_drc_limit(resp)) 3281 op->status = nfserr_rep_too_big_to_cache; 3282 status: 3283 /* 3284 * Note: We write the status directly, instead of using WRITE32(), 3285 * since it is already in network byte order. 3286 */ 3287 *statp = op->status; 3288 } 3289 3290 /* 3291 * Encode the reply stored in the stateowner reply cache 3292 * 3293 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3294 * previously sent already encoded operation. 3295 * 3296 * called with nfs4_lock_state() held 3297 */ 3298 void 3299 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3300 { 3301 __be32 *p; 3302 struct nfs4_replay *rp = op->replay; 3303 3304 BUG_ON(!rp); 3305 3306 RESERVE_SPACE(8); 3307 WRITE32(op->opnum); 3308 *p++ = rp->rp_status; /* already xdr'ed */ 3309 ADJUST_ARGS(); 3310 3311 RESERVE_SPACE(rp->rp_buflen); 3312 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3313 ADJUST_ARGS(); 3314 } 3315 3316 int 3317 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3318 { 3319 return xdr_ressize_check(rqstp, p); 3320 } 3321 3322 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 3323 { 3324 if (args->ops != args->iops) { 3325 kfree(args->ops); 3326 args->ops = args->iops; 3327 } 3328 kfree(args->tmpp); 3329 args->tmpp = NULL; 3330 while (args->to_free) { 3331 struct tmpbuf *tb = args->to_free; 3332 args->to_free = tb->next; 3333 tb->release(tb->buf); 3334 kfree(tb); 3335 } 3336 } 3337 3338 int 3339 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3340 { 3341 __be32 status; 3342 3343 args->p = p; 3344 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3345 args->pagelist = rqstp->rq_arg.pages; 3346 args->pagelen = rqstp->rq_arg.page_len; 3347 args->tmpp = NULL; 3348 args->to_free = NULL; 3349 args->ops = args->iops; 3350 args->rqstp = rqstp; 3351 3352 status = nfsd4_decode_compound(args); 3353 if (status) { 3354 nfsd4_release_compoundargs(args); 3355 } 3356 return !status; 3357 } 3358 3359 int 3360 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3361 { 3362 /* 3363 * All that remains is to write the tag and operation count... 3364 */ 3365 struct nfsd4_compound_state *cs = &resp->cstate; 3366 struct kvec *iov; 3367 p = resp->tagp; 3368 *p++ = htonl(resp->taglen); 3369 memcpy(p, resp->tag, resp->taglen); 3370 p += XDR_QUADLEN(resp->taglen); 3371 *p++ = htonl(resp->opcnt); 3372 3373 if (rqstp->rq_res.page_len) 3374 iov = &rqstp->rq_res.tail[0]; 3375 else 3376 iov = &rqstp->rq_res.head[0]; 3377 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3378 BUG_ON(iov->iov_len > PAGE_SIZE); 3379 if (nfsd4_has_session(cs)) { 3380 if (cs->status != nfserr_replay_cache) { 3381 nfsd4_store_cache_entry(resp); 3382 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3383 cs->slot->sl_inuse = false; 3384 } 3385 /* Renew the clientid on success and on replay */ 3386 release_session_client(cs->session); 3387 nfsd4_put_session(cs->session); 3388 } 3389 return 1; 3390 } 3391 3392 /* 3393 * Local variables: 3394 * c-basic-offset: 8 3395 * End: 3396 */ 3397