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/pagemap.h> 48 #include <linux/sunrpc/svcauth_gss.h> 49 50 #include "idmap.h" 51 #include "acl.h" 52 #include "xdr4.h" 53 #include "vfs.h" 54 #include "state.h" 55 #include "cache.h" 56 57 #define NFSDDBG_FACILITY NFSDDBG_XDR 58 59 /* 60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 61 * directory in order to indicate to the client that a filesystem boundary is present 62 * We use a fixed fsid for a referral 63 */ 64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 66 67 static __be32 68 check_filename(char *str, int len, __be32 err) 69 { 70 int i; 71 72 if (len == 0) 73 return nfserr_inval; 74 if (isdotent(str, len)) 75 return err; 76 for (i = 0; i < len; i++) 77 if (str[i] == '/') 78 return err; 79 return 0; 80 } 81 82 #define DECODE_HEAD \ 83 __be32 *p; \ 84 __be32 status 85 #define DECODE_TAIL \ 86 status = 0; \ 87 out: \ 88 return status; \ 89 xdr_error: \ 90 dprintk("NFSD: xdr error (%s:%d)\n", \ 91 __FILE__, __LINE__); \ 92 status = nfserr_bad_xdr; \ 93 goto out 94 95 #define READ32(x) (x) = ntohl(*p++) 96 #define READ64(x) do { \ 97 (x) = (u64)ntohl(*p++) << 32; \ 98 (x) |= ntohl(*p++); \ 99 } while (0) 100 #define READTIME(x) do { \ 101 p++; \ 102 (x) = ntohl(*p++); \ 103 p++; \ 104 } while (0) 105 #define READMEM(x,nbytes) do { \ 106 x = (char *)p; \ 107 p += XDR_QUADLEN(nbytes); \ 108 } while (0) 109 #define SAVEMEM(x,nbytes) do { \ 110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 111 savemem(argp, p, nbytes) : \ 112 (char *)p)) { \ 113 dprintk("NFSD: xdr error (%s:%d)\n", \ 114 __FILE__, __LINE__); \ 115 goto xdr_error; \ 116 } \ 117 p += XDR_QUADLEN(nbytes); \ 118 } while (0) 119 #define COPYMEM(x,nbytes) do { \ 120 memcpy((x), p, nbytes); \ 121 p += XDR_QUADLEN(nbytes); \ 122 } while (0) 123 124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 125 #define READ_BUF(nbytes) do { \ 126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 127 p = argp->p; \ 128 argp->p += XDR_QUADLEN(nbytes); \ 129 } else if (!(p = read_buf(argp, nbytes))) { \ 130 dprintk("NFSD: xdr error (%s:%d)\n", \ 131 __FILE__, __LINE__); \ 132 goto xdr_error; \ 133 } \ 134 } while (0) 135 136 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 137 { 138 /* We want more bytes than seem to be available. 139 * Maybe we need a new page, maybe we have just run out 140 */ 141 unsigned int avail = (char *)argp->end - (char *)argp->p; 142 __be32 *p; 143 if (avail + argp->pagelen < nbytes) 144 return NULL; 145 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 146 return NULL; 147 /* ok, we can do it with the current plus the next page */ 148 if (nbytes <= sizeof(argp->tmp)) 149 p = argp->tmp; 150 else { 151 kfree(argp->tmpp); 152 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 153 if (!p) 154 return NULL; 155 156 } 157 /* 158 * The following memcpy is safe because read_buf is always 159 * called with nbytes > avail, and the two cases above both 160 * guarantee p points to at least nbytes bytes. 161 */ 162 memcpy(p, argp->p, avail); 163 /* step to next page */ 164 argp->p = page_address(argp->pagelist[0]); 165 argp->pagelist++; 166 if (argp->pagelen < PAGE_SIZE) { 167 argp->end = argp->p + (argp->pagelen>>2); 168 argp->pagelen = 0; 169 } else { 170 argp->end = argp->p + (PAGE_SIZE>>2); 171 argp->pagelen -= PAGE_SIZE; 172 } 173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 174 argp->p += XDR_QUADLEN(nbytes - avail); 175 return p; 176 } 177 178 static int zero_clientid(clientid_t *clid) 179 { 180 return (clid->cl_boot == 0) && (clid->cl_id == 0); 181 } 182 183 static int 184 defer_free(struct nfsd4_compoundargs *argp, 185 void (*release)(const void *), void *p) 186 { 187 struct tmpbuf *tb; 188 189 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 190 if (!tb) 191 return -ENOMEM; 192 tb->buf = p; 193 tb->release = release; 194 tb->next = argp->to_free; 195 argp->to_free = tb; 196 return 0; 197 } 198 199 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 200 { 201 if (p == argp->tmp) { 202 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL); 203 if (!p) 204 return NULL; 205 } else { 206 BUG_ON(p != argp->tmpp); 207 argp->tmpp = NULL; 208 } 209 if (defer_free(argp, kfree, p)) { 210 kfree(p); 211 return NULL; 212 } else 213 return (char *)p; 214 } 215 216 static __be32 217 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 218 { 219 u32 bmlen; 220 DECODE_HEAD; 221 222 bmval[0] = 0; 223 bmval[1] = 0; 224 bmval[2] = 0; 225 226 READ_BUF(4); 227 READ32(bmlen); 228 if (bmlen > 1000) 229 goto xdr_error; 230 231 READ_BUF(bmlen << 2); 232 if (bmlen > 0) 233 READ32(bmval[0]); 234 if (bmlen > 1) 235 READ32(bmval[1]); 236 if (bmlen > 2) 237 READ32(bmval[2]); 238 239 DECODE_TAIL; 240 } 241 242 static __be32 243 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 244 struct iattr *iattr, struct nfs4_acl **acl) 245 { 246 int expected_len, len = 0; 247 u32 dummy32; 248 char *buf; 249 int host_err; 250 251 DECODE_HEAD; 252 iattr->ia_valid = 0; 253 if ((status = nfsd4_decode_bitmap(argp, bmval))) 254 return status; 255 256 READ_BUF(4); 257 READ32(expected_len); 258 259 if (bmval[0] & FATTR4_WORD0_SIZE) { 260 READ_BUF(8); 261 len += 8; 262 READ64(iattr->ia_size); 263 iattr->ia_valid |= ATTR_SIZE; 264 } 265 if (bmval[0] & FATTR4_WORD0_ACL) { 266 int nace; 267 struct nfs4_ace *ace; 268 269 READ_BUF(4); len += 4; 270 READ32(nace); 271 272 if (nace > NFS4_ACL_MAX) 273 return nfserr_resource; 274 275 *acl = nfs4_acl_new(nace); 276 if (*acl == NULL) { 277 host_err = -ENOMEM; 278 goto out_nfserr; 279 } 280 defer_free(argp, kfree, *acl); 281 282 (*acl)->naces = nace; 283 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 284 READ_BUF(16); len += 16; 285 READ32(ace->type); 286 READ32(ace->flag); 287 READ32(ace->access_mask); 288 READ32(dummy32); 289 READ_BUF(dummy32); 290 len += XDR_QUADLEN(dummy32) << 2; 291 READMEM(buf, dummy32); 292 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 293 status = nfs_ok; 294 if (ace->whotype != NFS4_ACL_WHO_NAMED) 295 ace->who = 0; 296 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 297 status = nfsd_map_name_to_gid(argp->rqstp, 298 buf, dummy32, &ace->who); 299 else 300 status = nfsd_map_name_to_uid(argp->rqstp, 301 buf, dummy32, &ace->who); 302 if (status) 303 return status; 304 } 305 } else 306 *acl = NULL; 307 if (bmval[1] & FATTR4_WORD1_MODE) { 308 READ_BUF(4); 309 len += 4; 310 READ32(iattr->ia_mode); 311 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 312 iattr->ia_valid |= ATTR_MODE; 313 } 314 if (bmval[1] & FATTR4_WORD1_OWNER) { 315 READ_BUF(4); 316 len += 4; 317 READ32(dummy32); 318 READ_BUF(dummy32); 319 len += (XDR_QUADLEN(dummy32) << 2); 320 READMEM(buf, dummy32); 321 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 322 return status; 323 iattr->ia_valid |= ATTR_UID; 324 } 325 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 326 READ_BUF(4); 327 len += 4; 328 READ32(dummy32); 329 READ_BUF(dummy32); 330 len += (XDR_QUADLEN(dummy32) << 2); 331 READMEM(buf, dummy32); 332 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 333 return status; 334 iattr->ia_valid |= ATTR_GID; 335 } 336 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 337 READ_BUF(4); 338 len += 4; 339 READ32(dummy32); 340 switch (dummy32) { 341 case NFS4_SET_TO_CLIENT_TIME: 342 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 343 all 32 bits of 'nseconds'. */ 344 READ_BUF(12); 345 len += 12; 346 READ32(dummy32); 347 if (dummy32) 348 return nfserr_inval; 349 READ32(iattr->ia_atime.tv_sec); 350 READ32(iattr->ia_atime.tv_nsec); 351 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 352 return nfserr_inval; 353 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 354 break; 355 case NFS4_SET_TO_SERVER_TIME: 356 iattr->ia_valid |= ATTR_ATIME; 357 break; 358 default: 359 goto xdr_error; 360 } 361 } 362 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 363 READ_BUF(4); 364 len += 4; 365 READ32(dummy32); 366 switch (dummy32) { 367 case NFS4_SET_TO_CLIENT_TIME: 368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 369 all 32 bits of 'nseconds'. */ 370 READ_BUF(12); 371 len += 12; 372 READ32(dummy32); 373 if (dummy32) 374 return nfserr_inval; 375 READ32(iattr->ia_mtime.tv_sec); 376 READ32(iattr->ia_mtime.tv_nsec); 377 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 378 return nfserr_inval; 379 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 380 break; 381 case NFS4_SET_TO_SERVER_TIME: 382 iattr->ia_valid |= ATTR_MTIME; 383 break; 384 default: 385 goto xdr_error; 386 } 387 } 388 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 389 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 390 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 391 READ_BUF(expected_len - len); 392 else if (len != expected_len) 393 goto xdr_error; 394 395 DECODE_TAIL; 396 397 out_nfserr: 398 status = nfserrno(host_err); 399 goto out; 400 } 401 402 static __be32 403 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 404 { 405 DECODE_HEAD; 406 407 READ_BUF(sizeof(stateid_t)); 408 READ32(sid->si_generation); 409 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 410 411 DECODE_TAIL; 412 } 413 414 static __be32 415 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 416 { 417 DECODE_HEAD; 418 419 READ_BUF(4); 420 READ32(access->ac_req_access); 421 422 DECODE_TAIL; 423 } 424 425 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 426 { 427 DECODE_HEAD; 428 429 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 430 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 431 READ32(bcts->dir); 432 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 433 * could help us figure out we should be using it. */ 434 DECODE_TAIL; 435 } 436 437 static __be32 438 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 439 { 440 DECODE_HEAD; 441 442 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 /* 537 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 538 */ 539 READ_BUF(28); 540 READ32(lock->lk_type); 541 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 542 goto xdr_error; 543 READ32(lock->lk_reclaim); 544 READ64(lock->lk_offset); 545 READ64(lock->lk_length); 546 READ32(lock->lk_is_new); 547 548 if (lock->lk_is_new) { 549 READ_BUF(4); 550 READ32(lock->lk_new_open_seqid); 551 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 552 if (status) 553 return status; 554 READ_BUF(8 + sizeof(clientid_t)); 555 READ32(lock->lk_new_lock_seqid); 556 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 557 READ32(lock->lk_new_owner.len); 558 READ_BUF(lock->lk_new_owner.len); 559 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 560 } else { 561 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 562 if (status) 563 return status; 564 READ_BUF(4); 565 READ32(lock->lk_old_lock_seqid); 566 } 567 568 DECODE_TAIL; 569 } 570 571 static __be32 572 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 573 { 574 DECODE_HEAD; 575 576 READ_BUF(32); 577 READ32(lockt->lt_type); 578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 579 goto xdr_error; 580 READ64(lockt->lt_offset); 581 READ64(lockt->lt_length); 582 COPYMEM(&lockt->lt_clientid, 8); 583 READ32(lockt->lt_owner.len); 584 READ_BUF(lockt->lt_owner.len); 585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 586 587 DECODE_TAIL; 588 } 589 590 static __be32 591 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 592 { 593 DECODE_HEAD; 594 595 READ_BUF(8); 596 READ32(locku->lu_type); 597 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 598 goto xdr_error; 599 READ32(locku->lu_seqid); 600 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 601 if (status) 602 return status; 603 READ_BUF(16); 604 READ64(locku->lu_offset); 605 READ64(locku->lu_length); 606 607 DECODE_TAIL; 608 } 609 610 static __be32 611 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 612 { 613 DECODE_HEAD; 614 615 READ_BUF(4); 616 READ32(lookup->lo_len); 617 READ_BUF(lookup->lo_len); 618 SAVEMEM(lookup->lo_name, lookup->lo_len); 619 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 620 return status; 621 622 DECODE_TAIL; 623 } 624 625 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 626 { 627 __be32 *p; 628 u32 w; 629 630 READ_BUF(4); 631 READ32(w); 632 *share_access = w & NFS4_SHARE_ACCESS_MASK; 633 *deleg_want = w & NFS4_SHARE_WANT_MASK; 634 if (deleg_when) 635 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 636 637 switch (w & NFS4_SHARE_ACCESS_MASK) { 638 case NFS4_SHARE_ACCESS_READ: 639 case NFS4_SHARE_ACCESS_WRITE: 640 case NFS4_SHARE_ACCESS_BOTH: 641 break; 642 default: 643 return nfserr_bad_xdr; 644 } 645 w &= ~NFS4_SHARE_ACCESS_MASK; 646 if (!w) 647 return nfs_ok; 648 if (!argp->minorversion) 649 return nfserr_bad_xdr; 650 switch (w & NFS4_SHARE_WANT_MASK) { 651 case NFS4_SHARE_WANT_NO_PREFERENCE: 652 case NFS4_SHARE_WANT_READ_DELEG: 653 case NFS4_SHARE_WANT_WRITE_DELEG: 654 case NFS4_SHARE_WANT_ANY_DELEG: 655 case NFS4_SHARE_WANT_NO_DELEG: 656 case NFS4_SHARE_WANT_CANCEL: 657 break; 658 default: 659 return nfserr_bad_xdr; 660 } 661 w &= ~NFS4_SHARE_WANT_MASK; 662 if (!w) 663 return nfs_ok; 664 665 if (!deleg_when) /* open_downgrade */ 666 return nfserr_inval; 667 switch (w) { 668 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 669 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 670 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 671 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 672 return nfs_ok; 673 } 674 xdr_error: 675 return nfserr_bad_xdr; 676 } 677 678 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 679 { 680 __be32 *p; 681 682 READ_BUF(4); 683 READ32(*x); 684 /* Note: unlinke access bits, deny bits may be zero. */ 685 if (*x & ~NFS4_SHARE_DENY_BOTH) 686 return nfserr_bad_xdr; 687 return nfs_ok; 688 xdr_error: 689 return nfserr_bad_xdr; 690 } 691 692 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 693 { 694 __be32 *p; 695 696 READ_BUF(4); 697 READ32(o->len); 698 699 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 700 return nfserr_bad_xdr; 701 702 READ_BUF(o->len); 703 SAVEMEM(o->data, o->len); 704 return nfs_ok; 705 xdr_error: 706 return nfserr_bad_xdr; 707 } 708 709 static __be32 710 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 711 { 712 DECODE_HEAD; 713 u32 dummy; 714 715 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 716 open->op_iattr.ia_valid = 0; 717 open->op_openowner = NULL; 718 719 /* seqid, share_access, share_deny, clientid, ownerlen */ 720 READ_BUF(4); 721 READ32(open->op_seqid); 722 /* decode, yet ignore deleg_when until supported */ 723 status = nfsd4_decode_share_access(argp, &open->op_share_access, 724 &open->op_deleg_want, &dummy); 725 if (status) 726 goto xdr_error; 727 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 728 if (status) 729 goto xdr_error; 730 READ_BUF(sizeof(clientid_t)); 731 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 732 status = nfsd4_decode_opaque(argp, &open->op_owner); 733 if (status) 734 goto xdr_error; 735 READ_BUF(4); 736 READ32(open->op_create); 737 switch (open->op_create) { 738 case NFS4_OPEN_NOCREATE: 739 break; 740 case NFS4_OPEN_CREATE: 741 READ_BUF(4); 742 READ32(open->op_createmode); 743 switch (open->op_createmode) { 744 case NFS4_CREATE_UNCHECKED: 745 case NFS4_CREATE_GUARDED: 746 status = nfsd4_decode_fattr(argp, open->op_bmval, 747 &open->op_iattr, &open->op_acl); 748 if (status) 749 goto out; 750 break; 751 case NFS4_CREATE_EXCLUSIVE: 752 READ_BUF(NFS4_VERIFIER_SIZE); 753 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 754 break; 755 case NFS4_CREATE_EXCLUSIVE4_1: 756 if (argp->minorversion < 1) 757 goto xdr_error; 758 READ_BUF(NFS4_VERIFIER_SIZE); 759 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 760 status = nfsd4_decode_fattr(argp, open->op_bmval, 761 &open->op_iattr, &open->op_acl); 762 if (status) 763 goto out; 764 break; 765 default: 766 goto xdr_error; 767 } 768 break; 769 default: 770 goto xdr_error; 771 } 772 773 /* open_claim */ 774 READ_BUF(4); 775 READ32(open->op_claim_type); 776 switch (open->op_claim_type) { 777 case NFS4_OPEN_CLAIM_NULL: 778 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 779 READ_BUF(4); 780 READ32(open->op_fname.len); 781 READ_BUF(open->op_fname.len); 782 SAVEMEM(open->op_fname.data, open->op_fname.len); 783 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 784 return status; 785 break; 786 case NFS4_OPEN_CLAIM_PREVIOUS: 787 READ_BUF(4); 788 READ32(open->op_delegate_type); 789 break; 790 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 791 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 792 if (status) 793 return status; 794 READ_BUF(4); 795 READ32(open->op_fname.len); 796 READ_BUF(open->op_fname.len); 797 SAVEMEM(open->op_fname.data, open->op_fname.len); 798 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 799 return status; 800 break; 801 case NFS4_OPEN_CLAIM_FH: 802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 803 if (argp->minorversion < 1) 804 goto xdr_error; 805 /* void */ 806 break; 807 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 808 if (argp->minorversion < 1) 809 goto xdr_error; 810 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 811 if (status) 812 return status; 813 break; 814 default: 815 goto xdr_error; 816 } 817 818 DECODE_TAIL; 819 } 820 821 static __be32 822 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 823 { 824 DECODE_HEAD; 825 826 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 827 if (status) 828 return status; 829 READ_BUF(4); 830 READ32(open_conf->oc_seqid); 831 832 DECODE_TAIL; 833 } 834 835 static __be32 836 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 837 { 838 DECODE_HEAD; 839 840 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 841 if (status) 842 return status; 843 READ_BUF(4); 844 READ32(open_down->od_seqid); 845 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 846 &open_down->od_deleg_want, NULL); 847 if (status) 848 return status; 849 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 850 if (status) 851 return status; 852 DECODE_TAIL; 853 } 854 855 static __be32 856 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 857 { 858 DECODE_HEAD; 859 860 READ_BUF(4); 861 READ32(putfh->pf_fhlen); 862 if (putfh->pf_fhlen > NFS4_FHSIZE) 863 goto xdr_error; 864 READ_BUF(putfh->pf_fhlen); 865 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 866 867 DECODE_TAIL; 868 } 869 870 static __be32 871 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 872 { 873 DECODE_HEAD; 874 875 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 876 if (status) 877 return status; 878 READ_BUF(12); 879 READ64(read->rd_offset); 880 READ32(read->rd_length); 881 882 DECODE_TAIL; 883 } 884 885 static __be32 886 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 887 { 888 DECODE_HEAD; 889 890 READ_BUF(24); 891 READ64(readdir->rd_cookie); 892 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 893 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 894 READ32(readdir->rd_maxcount); 895 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 896 goto out; 897 898 DECODE_TAIL; 899 } 900 901 static __be32 902 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 903 { 904 DECODE_HEAD; 905 906 READ_BUF(4); 907 READ32(remove->rm_namelen); 908 READ_BUF(remove->rm_namelen); 909 SAVEMEM(remove->rm_name, remove->rm_namelen); 910 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 911 return status; 912 913 DECODE_TAIL; 914 } 915 916 static __be32 917 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 918 { 919 DECODE_HEAD; 920 921 READ_BUF(4); 922 READ32(rename->rn_snamelen); 923 READ_BUF(rename->rn_snamelen + 4); 924 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 925 READ32(rename->rn_tnamelen); 926 READ_BUF(rename->rn_tnamelen); 927 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 928 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 929 return status; 930 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 931 return status; 932 933 DECODE_TAIL; 934 } 935 936 static __be32 937 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 938 { 939 DECODE_HEAD; 940 941 READ_BUF(sizeof(clientid_t)); 942 COPYMEM(clientid, sizeof(clientid_t)); 943 944 DECODE_TAIL; 945 } 946 947 static __be32 948 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 949 struct nfsd4_secinfo *secinfo) 950 { 951 DECODE_HEAD; 952 953 READ_BUF(4); 954 READ32(secinfo->si_namelen); 955 READ_BUF(secinfo->si_namelen); 956 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 957 status = check_filename(secinfo->si_name, secinfo->si_namelen, 958 nfserr_noent); 959 if (status) 960 return status; 961 DECODE_TAIL; 962 } 963 964 static __be32 965 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 966 struct nfsd4_secinfo_no_name *sin) 967 { 968 DECODE_HEAD; 969 970 READ_BUF(4); 971 READ32(sin->sin_style); 972 DECODE_TAIL; 973 } 974 975 static __be32 976 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 977 { 978 __be32 status; 979 980 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 981 if (status) 982 return status; 983 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 984 &setattr->sa_acl); 985 } 986 987 static __be32 988 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 989 { 990 DECODE_HEAD; 991 992 READ_BUF(NFS4_VERIFIER_SIZE); 993 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 994 995 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 996 if (status) 997 return nfserr_bad_xdr; 998 READ_BUF(8); 999 READ32(setclientid->se_callback_prog); 1000 READ32(setclientid->se_callback_netid_len); 1001 1002 READ_BUF(setclientid->se_callback_netid_len + 4); 1003 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1004 READ32(setclientid->se_callback_addr_len); 1005 1006 READ_BUF(setclientid->se_callback_addr_len + 4); 1007 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1008 READ32(setclientid->se_callback_ident); 1009 1010 DECODE_TAIL; 1011 } 1012 1013 static __be32 1014 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1015 { 1016 DECODE_HEAD; 1017 1018 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1019 COPYMEM(&scd_c->sc_clientid, 8); 1020 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1021 1022 DECODE_TAIL; 1023 } 1024 1025 /* Also used for NVERIFY */ 1026 static __be32 1027 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1028 { 1029 #if 0 1030 struct nfsd4_compoundargs save = { 1031 .p = argp->p, 1032 .end = argp->end, 1033 .rqstp = argp->rqstp, 1034 }; 1035 u32 ve_bmval[2]; 1036 struct iattr ve_iattr; /* request */ 1037 struct nfs4_acl *ve_acl; /* request */ 1038 #endif 1039 DECODE_HEAD; 1040 1041 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1042 goto out; 1043 1044 /* For convenience's sake, we compare raw xdr'd attributes in 1045 * nfsd4_proc_verify; however we still decode here just to return 1046 * correct error in case of bad xdr. */ 1047 #if 0 1048 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); 1049 if (status == nfserr_inval) { 1050 status = nfserrno(status); 1051 goto out; 1052 } 1053 #endif 1054 READ_BUF(4); 1055 READ32(verify->ve_attrlen); 1056 READ_BUF(verify->ve_attrlen); 1057 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1058 1059 DECODE_TAIL; 1060 } 1061 1062 static __be32 1063 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1064 { 1065 int avail; 1066 int v; 1067 int len; 1068 DECODE_HEAD; 1069 1070 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1071 if (status) 1072 return status; 1073 READ_BUF(16); 1074 READ64(write->wr_offset); 1075 READ32(write->wr_stable_how); 1076 if (write->wr_stable_how > 2) 1077 goto xdr_error; 1078 READ32(write->wr_buflen); 1079 1080 /* Sorry .. no magic macros for this.. * 1081 * READ_BUF(write->wr_buflen); 1082 * SAVEMEM(write->wr_buf, write->wr_buflen); 1083 */ 1084 avail = (char*)argp->end - (char*)argp->p; 1085 if (avail + argp->pagelen < write->wr_buflen) { 1086 dprintk("NFSD: xdr error (%s:%d)\n", 1087 __FILE__, __LINE__); 1088 goto xdr_error; 1089 } 1090 argp->rqstp->rq_vec[0].iov_base = p; 1091 argp->rqstp->rq_vec[0].iov_len = avail; 1092 v = 0; 1093 len = write->wr_buflen; 1094 while (len > argp->rqstp->rq_vec[v].iov_len) { 1095 len -= argp->rqstp->rq_vec[v].iov_len; 1096 v++; 1097 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 1098 argp->pagelist++; 1099 if (argp->pagelen >= PAGE_SIZE) { 1100 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 1101 argp->pagelen -= PAGE_SIZE; 1102 } else { 1103 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 1104 argp->pagelen -= len; 1105 } 1106 } 1107 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 1108 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 1109 argp->rqstp->rq_vec[v].iov_len = len; 1110 write->wr_vlen = v+1; 1111 1112 DECODE_TAIL; 1113 } 1114 1115 static __be32 1116 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1117 { 1118 DECODE_HEAD; 1119 1120 READ_BUF(12); 1121 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1122 READ32(rlockowner->rl_owner.len); 1123 READ_BUF(rlockowner->rl_owner.len); 1124 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1125 1126 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1127 return nfserr_inval; 1128 DECODE_TAIL; 1129 } 1130 1131 static __be32 1132 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1133 struct nfsd4_exchange_id *exid) 1134 { 1135 int dummy, tmp; 1136 DECODE_HEAD; 1137 1138 READ_BUF(NFS4_VERIFIER_SIZE); 1139 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1140 1141 status = nfsd4_decode_opaque(argp, &exid->clname); 1142 if (status) 1143 return nfserr_bad_xdr; 1144 1145 READ_BUF(4); 1146 READ32(exid->flags); 1147 1148 /* Ignore state_protect4_a */ 1149 READ_BUF(4); 1150 READ32(exid->spa_how); 1151 switch (exid->spa_how) { 1152 case SP4_NONE: 1153 break; 1154 case SP4_MACH_CRED: 1155 /* spo_must_enforce */ 1156 READ_BUF(4); 1157 READ32(dummy); 1158 READ_BUF(dummy * 4); 1159 p += dummy; 1160 1161 /* spo_must_allow */ 1162 READ_BUF(4); 1163 READ32(dummy); 1164 READ_BUF(dummy * 4); 1165 p += dummy; 1166 break; 1167 case SP4_SSV: 1168 /* ssp_ops */ 1169 READ_BUF(4); 1170 READ32(dummy); 1171 READ_BUF(dummy * 4); 1172 p += dummy; 1173 1174 READ_BUF(4); 1175 READ32(dummy); 1176 READ_BUF(dummy * 4); 1177 p += dummy; 1178 1179 /* ssp_hash_algs<> */ 1180 READ_BUF(4); 1181 READ32(tmp); 1182 while (tmp--) { 1183 READ_BUF(4); 1184 READ32(dummy); 1185 READ_BUF(dummy); 1186 p += XDR_QUADLEN(dummy); 1187 } 1188 1189 /* ssp_encr_algs<> */ 1190 READ_BUF(4); 1191 READ32(tmp); 1192 while (tmp--) { 1193 READ_BUF(4); 1194 READ32(dummy); 1195 READ_BUF(dummy); 1196 p += XDR_QUADLEN(dummy); 1197 } 1198 1199 /* ssp_window and ssp_num_gss_handles */ 1200 READ_BUF(8); 1201 READ32(dummy); 1202 READ32(dummy); 1203 break; 1204 default: 1205 goto xdr_error; 1206 } 1207 1208 /* Ignore Implementation ID */ 1209 READ_BUF(4); /* nfs_impl_id4 array length */ 1210 READ32(dummy); 1211 1212 if (dummy > 1) 1213 goto xdr_error; 1214 1215 if (dummy == 1) { 1216 /* nii_domain */ 1217 READ_BUF(4); 1218 READ32(dummy); 1219 READ_BUF(dummy); 1220 p += XDR_QUADLEN(dummy); 1221 1222 /* nii_name */ 1223 READ_BUF(4); 1224 READ32(dummy); 1225 READ_BUF(dummy); 1226 p += XDR_QUADLEN(dummy); 1227 1228 /* nii_date */ 1229 READ_BUF(12); 1230 p += 3; 1231 } 1232 DECODE_TAIL; 1233 } 1234 1235 static __be32 1236 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1237 struct nfsd4_create_session *sess) 1238 { 1239 DECODE_HEAD; 1240 1241 u32 dummy; 1242 char *machine_name; 1243 int i; 1244 int nr_secflavs; 1245 1246 READ_BUF(16); 1247 COPYMEM(&sess->clientid, 8); 1248 READ32(sess->seqid); 1249 READ32(sess->flags); 1250 1251 /* Fore channel attrs */ 1252 READ_BUF(28); 1253 READ32(dummy); /* headerpadsz is always 0 */ 1254 READ32(sess->fore_channel.maxreq_sz); 1255 READ32(sess->fore_channel.maxresp_sz); 1256 READ32(sess->fore_channel.maxresp_cached); 1257 READ32(sess->fore_channel.maxops); 1258 READ32(sess->fore_channel.maxreqs); 1259 READ32(sess->fore_channel.nr_rdma_attrs); 1260 if (sess->fore_channel.nr_rdma_attrs == 1) { 1261 READ_BUF(4); 1262 READ32(sess->fore_channel.rdma_attrs); 1263 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1264 dprintk("Too many fore channel attr bitmaps!\n"); 1265 goto xdr_error; 1266 } 1267 1268 /* Back channel attrs */ 1269 READ_BUF(28); 1270 READ32(dummy); /* headerpadsz is always 0 */ 1271 READ32(sess->back_channel.maxreq_sz); 1272 READ32(sess->back_channel.maxresp_sz); 1273 READ32(sess->back_channel.maxresp_cached); 1274 READ32(sess->back_channel.maxops); 1275 READ32(sess->back_channel.maxreqs); 1276 READ32(sess->back_channel.nr_rdma_attrs); 1277 if (sess->back_channel.nr_rdma_attrs == 1) { 1278 READ_BUF(4); 1279 READ32(sess->back_channel.rdma_attrs); 1280 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1281 dprintk("Too many back channel attr bitmaps!\n"); 1282 goto xdr_error; 1283 } 1284 1285 READ_BUF(8); 1286 READ32(sess->callback_prog); 1287 1288 /* callback_sec_params4 */ 1289 READ32(nr_secflavs); 1290 for (i = 0; i < nr_secflavs; ++i) { 1291 READ_BUF(4); 1292 READ32(dummy); 1293 switch (dummy) { 1294 case RPC_AUTH_NULL: 1295 /* Nothing to read */ 1296 break; 1297 case RPC_AUTH_UNIX: 1298 READ_BUF(8); 1299 /* stamp */ 1300 READ32(dummy); 1301 1302 /* machine name */ 1303 READ32(dummy); 1304 READ_BUF(dummy); 1305 SAVEMEM(machine_name, dummy); 1306 1307 /* uid, gid */ 1308 READ_BUF(8); 1309 READ32(sess->uid); 1310 READ32(sess->gid); 1311 1312 /* more gids */ 1313 READ_BUF(4); 1314 READ32(dummy); 1315 READ_BUF(dummy * 4); 1316 break; 1317 case RPC_AUTH_GSS: 1318 dprintk("RPC_AUTH_GSS callback secflavor " 1319 "not supported!\n"); 1320 READ_BUF(8); 1321 /* gcbp_service */ 1322 READ32(dummy); 1323 /* gcbp_handle_from_server */ 1324 READ32(dummy); 1325 READ_BUF(dummy); 1326 p += XDR_QUADLEN(dummy); 1327 /* gcbp_handle_from_client */ 1328 READ_BUF(4); 1329 READ32(dummy); 1330 READ_BUF(dummy); 1331 break; 1332 default: 1333 dprintk("Illegal callback secflavor\n"); 1334 return nfserr_inval; 1335 } 1336 } 1337 DECODE_TAIL; 1338 } 1339 1340 static __be32 1341 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1342 struct nfsd4_destroy_session *destroy_session) 1343 { 1344 DECODE_HEAD; 1345 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1346 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1347 1348 DECODE_TAIL; 1349 } 1350 1351 static __be32 1352 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1353 struct nfsd4_free_stateid *free_stateid) 1354 { 1355 DECODE_HEAD; 1356 1357 READ_BUF(sizeof(stateid_t)); 1358 READ32(free_stateid->fr_stateid.si_generation); 1359 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1360 1361 DECODE_TAIL; 1362 } 1363 1364 static __be32 1365 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1366 struct nfsd4_sequence *seq) 1367 { 1368 DECODE_HEAD; 1369 1370 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1371 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1372 READ32(seq->seqid); 1373 READ32(seq->slotid); 1374 READ32(seq->maxslots); 1375 READ32(seq->cachethis); 1376 1377 DECODE_TAIL; 1378 } 1379 1380 static __be32 1381 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1382 { 1383 int i; 1384 __be32 *p, status; 1385 struct nfsd4_test_stateid_id *stateid; 1386 1387 READ_BUF(4); 1388 test_stateid->ts_num_ids = ntohl(*p++); 1389 1390 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1391 1392 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1393 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL); 1394 if (!stateid) { 1395 status = nfserrno(-ENOMEM); 1396 goto out; 1397 } 1398 1399 defer_free(argp, kfree, stateid); 1400 INIT_LIST_HEAD(&stateid->ts_id_list); 1401 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1402 1403 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1404 if (status) 1405 goto out; 1406 } 1407 1408 status = 0; 1409 out: 1410 return status; 1411 xdr_error: 1412 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1413 status = nfserr_bad_xdr; 1414 goto out; 1415 } 1416 1417 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1418 { 1419 DECODE_HEAD; 1420 1421 READ_BUF(8); 1422 COPYMEM(&dc->clientid, 8); 1423 1424 DECODE_TAIL; 1425 } 1426 1427 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1428 { 1429 DECODE_HEAD; 1430 1431 READ_BUF(4); 1432 READ32(rc->rca_one_fs); 1433 1434 DECODE_TAIL; 1435 } 1436 1437 static __be32 1438 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1439 { 1440 return nfs_ok; 1441 } 1442 1443 static __be32 1444 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1445 { 1446 return nfserr_notsupp; 1447 } 1448 1449 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1450 1451 static nfsd4_dec nfsd4_dec_ops[] = { 1452 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1453 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1454 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1455 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1456 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1457 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1458 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1459 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1460 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1461 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1462 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1463 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1464 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1465 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1466 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1467 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1468 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1469 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1470 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1471 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1472 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1473 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1474 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1475 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1476 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1477 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1478 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1479 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1480 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1481 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1482 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1483 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1484 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1485 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1486 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1487 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1488 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1489 }; 1490 1491 static nfsd4_dec nfsd41_dec_ops[] = { 1492 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1493 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1494 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1495 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1496 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1497 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1498 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1499 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1500 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1501 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1502 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1503 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1504 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1505 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1506 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1507 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1508 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1509 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1510 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1511 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1512 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1513 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1514 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1515 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1516 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1517 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1518 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1519 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1520 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1521 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1522 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1523 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1524 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1525 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1526 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1527 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1528 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1529 1530 /* new operations for NFSv4.1 */ 1531 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1532 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1533 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1534 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1535 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1536 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1537 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1538 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1539 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1540 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1541 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1542 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1543 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1544 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1545 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1546 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1547 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1548 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1549 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1550 }; 1551 1552 struct nfsd4_minorversion_ops { 1553 nfsd4_dec *decoders; 1554 int nops; 1555 }; 1556 1557 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1558 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1559 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1560 }; 1561 1562 static __be32 1563 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1564 { 1565 DECODE_HEAD; 1566 struct nfsd4_op *op; 1567 struct nfsd4_minorversion_ops *ops; 1568 bool cachethis = false; 1569 int i; 1570 1571 /* 1572 * XXX: According to spec, we should check the tag 1573 * for UTF-8 compliance. I'm postponing this for 1574 * now because it seems that some clients do use 1575 * binary tags. 1576 */ 1577 READ_BUF(4); 1578 READ32(argp->taglen); 1579 READ_BUF(argp->taglen + 8); 1580 SAVEMEM(argp->tag, argp->taglen); 1581 READ32(argp->minorversion); 1582 READ32(argp->opcnt); 1583 1584 if (argp->taglen > NFSD4_MAX_TAGLEN) 1585 goto xdr_error; 1586 if (argp->opcnt > 100) 1587 goto xdr_error; 1588 1589 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1590 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1591 if (!argp->ops) { 1592 argp->ops = argp->iops; 1593 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1594 goto xdr_error; 1595 } 1596 } 1597 1598 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1599 argp->opcnt = 0; 1600 1601 ops = &nfsd4_minorversion[argp->minorversion]; 1602 for (i = 0; i < argp->opcnt; i++) { 1603 op = &argp->ops[i]; 1604 op->replay = NULL; 1605 1606 /* 1607 * We can't use READ_BUF() here because we need to handle 1608 * a missing opcode as an OP_WRITE + 1. So we need to check 1609 * to see if we're truly at the end of our buffer or if there 1610 * is another page we need to flip to. 1611 */ 1612 1613 if (argp->p == argp->end) { 1614 if (argp->pagelen < 4) { 1615 /* There isn't an opcode still on the wire */ 1616 op->opnum = OP_WRITE + 1; 1617 op->status = nfserr_bad_xdr; 1618 argp->opcnt = i+1; 1619 break; 1620 } 1621 1622 /* 1623 * False alarm. We just hit a page boundary, but there 1624 * is still data available. Move pointer across page 1625 * boundary. *snip from READ_BUF* 1626 */ 1627 argp->p = page_address(argp->pagelist[0]); 1628 argp->pagelist++; 1629 if (argp->pagelen < PAGE_SIZE) { 1630 argp->end = argp->p + (argp->pagelen>>2); 1631 argp->pagelen = 0; 1632 } else { 1633 argp->end = argp->p + (PAGE_SIZE>>2); 1634 argp->pagelen -= PAGE_SIZE; 1635 } 1636 } 1637 op->opnum = ntohl(*argp->p++); 1638 1639 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1640 op->status = ops->decoders[op->opnum](argp, &op->u); 1641 else { 1642 op->opnum = OP_ILLEGAL; 1643 op->status = nfserr_op_illegal; 1644 } 1645 1646 if (op->status) { 1647 argp->opcnt = i+1; 1648 break; 1649 } 1650 /* 1651 * We'll try to cache the result in the DRC if any one 1652 * op in the compound wants to be cached: 1653 */ 1654 cachethis |= nfsd4_cache_this_op(op); 1655 } 1656 /* Sessions make the DRC unnecessary: */ 1657 if (argp->minorversion) 1658 cachethis = false; 1659 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1660 1661 DECODE_TAIL; 1662 } 1663 1664 #define WRITE32(n) *p++ = htonl(n) 1665 #define WRITE64(n) do { \ 1666 *p++ = htonl((u32)((n) >> 32)); \ 1667 *p++ = htonl((u32)(n)); \ 1668 } while (0) 1669 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1670 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1671 memcpy(p, ptr, nbytes); \ 1672 p += XDR_QUADLEN(nbytes); \ 1673 }} while (0) 1674 1675 static void write32(__be32 **p, u32 n) 1676 { 1677 *(*p)++ = n; 1678 } 1679 1680 static void write64(__be32 **p, u64 n) 1681 { 1682 write32(p, (u32)(n >> 32)); 1683 write32(p, (u32)n); 1684 } 1685 1686 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1687 { 1688 if (IS_I_VERSION(inode)) { 1689 write64(p, inode->i_version); 1690 } else { 1691 write32(p, stat->ctime.tv_sec); 1692 write32(p, stat->ctime.tv_nsec); 1693 } 1694 } 1695 1696 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1697 { 1698 write32(p, c->atomic); 1699 if (c->change_supported) { 1700 write64(p, c->before_change); 1701 write64(p, c->after_change); 1702 } else { 1703 write32(p, c->before_ctime_sec); 1704 write32(p, c->before_ctime_nsec); 1705 write32(p, c->after_ctime_sec); 1706 write32(p, c->after_ctime_nsec); 1707 } 1708 } 1709 1710 #define RESERVE_SPACE(nbytes) do { \ 1711 p = resp->p; \ 1712 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1713 } while (0) 1714 #define ADJUST_ARGS() resp->p = p 1715 1716 /* 1717 * Header routine to setup seqid operation replay cache 1718 */ 1719 #define ENCODE_SEQID_OP_HEAD \ 1720 __be32 *save; \ 1721 \ 1722 save = resp->p; 1723 1724 /* 1725 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1726 * is where sequence id's are incremented, and the replay cache is filled. 1727 * Note that we increment sequence id's here, at the last moment, so we're sure 1728 * we know whether the error to be returned is a sequence id mutating error. 1729 */ 1730 1731 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr) 1732 { 1733 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner; 1734 1735 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) { 1736 stateowner->so_seqid++; 1737 stateowner->so_replay.rp_status = nfserr; 1738 stateowner->so_replay.rp_buflen = 1739 (char *)resp->p - (char *)save; 1740 memcpy(stateowner->so_replay.rp_buf, save, 1741 stateowner->so_replay.rp_buflen); 1742 nfsd4_purge_closed_stateid(stateowner); 1743 } 1744 } 1745 1746 /* Encode as an array of strings the string given with components 1747 * separated @sep. 1748 */ 1749 static __be32 nfsd4_encode_components(char sep, char *components, 1750 __be32 **pp, int *buflen) 1751 { 1752 __be32 *p = *pp; 1753 __be32 *countp = p; 1754 int strlen, count=0; 1755 char *str, *end; 1756 1757 dprintk("nfsd4_encode_components(%s)\n", components); 1758 if ((*buflen -= 4) < 0) 1759 return nfserr_resource; 1760 WRITE32(0); /* We will fill this in with @count later */ 1761 end = str = components; 1762 while (*end) { 1763 for (; *end && (*end != sep); end++) 1764 ; /* Point to end of component */ 1765 strlen = end - str; 1766 if (strlen) { 1767 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1768 return nfserr_resource; 1769 WRITE32(strlen); 1770 WRITEMEM(str, strlen); 1771 count++; 1772 } 1773 else 1774 end++; 1775 str = end; 1776 } 1777 *pp = p; 1778 p = countp; 1779 WRITE32(count); 1780 return 0; 1781 } 1782 1783 /* 1784 * encode a location element of a fs_locations structure 1785 */ 1786 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1787 __be32 **pp, int *buflen) 1788 { 1789 __be32 status; 1790 __be32 *p = *pp; 1791 1792 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1793 if (status) 1794 return status; 1795 status = nfsd4_encode_components('/', location->path, &p, buflen); 1796 if (status) 1797 return status; 1798 *pp = p; 1799 return 0; 1800 } 1801 1802 /* 1803 * Encode a path in RFC3530 'pathname4' format 1804 */ 1805 static __be32 nfsd4_encode_path(const struct path *root, 1806 const struct path *path, __be32 **pp, int *buflen) 1807 { 1808 struct path cur = { 1809 .mnt = path->mnt, 1810 .dentry = path->dentry, 1811 }; 1812 __be32 *p = *pp; 1813 struct dentry **components = NULL; 1814 unsigned int ncomponents = 0; 1815 __be32 err = nfserr_jukebox; 1816 1817 dprintk("nfsd4_encode_components("); 1818 1819 path_get(&cur); 1820 /* First walk the path up to the nfsd root, and store the 1821 * dentries/path components in an array. 1822 */ 1823 for (;;) { 1824 if (cur.dentry == root->dentry && cur.mnt == root->mnt) 1825 break; 1826 if (cur.dentry == cur.mnt->mnt_root) { 1827 if (follow_up(&cur)) 1828 continue; 1829 goto out_free; 1830 } 1831 if ((ncomponents & 15) == 0) { 1832 struct dentry **new; 1833 new = krealloc(components, 1834 sizeof(*new) * (ncomponents + 16), 1835 GFP_KERNEL); 1836 if (!new) 1837 goto out_free; 1838 components = new; 1839 } 1840 components[ncomponents++] = cur.dentry; 1841 cur.dentry = dget_parent(cur.dentry); 1842 } 1843 1844 *buflen -= 4; 1845 if (*buflen < 0) 1846 goto out_free; 1847 WRITE32(ncomponents); 1848 1849 while (ncomponents) { 1850 struct dentry *dentry = components[ncomponents - 1]; 1851 unsigned int len = dentry->d_name.len; 1852 1853 *buflen -= 4 + (XDR_QUADLEN(len) << 2); 1854 if (*buflen < 0) 1855 goto out_free; 1856 WRITE32(len); 1857 WRITEMEM(dentry->d_name.name, len); 1858 dprintk("/%s", dentry->d_name.name); 1859 dput(dentry); 1860 ncomponents--; 1861 } 1862 1863 *pp = p; 1864 err = 0; 1865 out_free: 1866 dprintk(")\n"); 1867 while (ncomponents) 1868 dput(components[--ncomponents]); 1869 kfree(components); 1870 path_put(&cur); 1871 return err; 1872 } 1873 1874 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, 1875 const struct path *path, __be32 **pp, int *buflen) 1876 { 1877 struct svc_export *exp_ps; 1878 __be32 res; 1879 1880 exp_ps = rqst_find_fsidzero_export(rqstp); 1881 if (IS_ERR(exp_ps)) 1882 return nfserrno(PTR_ERR(exp_ps)); 1883 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); 1884 exp_put(exp_ps); 1885 return res; 1886 } 1887 1888 /* 1889 * encode a fs_locations structure 1890 */ 1891 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1892 struct svc_export *exp, 1893 __be32 **pp, int *buflen) 1894 { 1895 __be32 status; 1896 int i; 1897 __be32 *p = *pp; 1898 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1899 1900 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); 1901 if (status) 1902 return status; 1903 if ((*buflen -= 4) < 0) 1904 return nfserr_resource; 1905 WRITE32(fslocs->locations_count); 1906 for (i=0; i<fslocs->locations_count; i++) { 1907 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1908 &p, buflen); 1909 if (status) 1910 return status; 1911 } 1912 *pp = p; 1913 return 0; 1914 } 1915 1916 static u32 nfs4_file_type(umode_t mode) 1917 { 1918 switch (mode & S_IFMT) { 1919 case S_IFIFO: return NF4FIFO; 1920 case S_IFCHR: return NF4CHR; 1921 case S_IFDIR: return NF4DIR; 1922 case S_IFBLK: return NF4BLK; 1923 case S_IFLNK: return NF4LNK; 1924 case S_IFREG: return NF4REG; 1925 case S_IFSOCK: return NF4SOCK; 1926 default: return NF4BAD; 1927 }; 1928 } 1929 1930 static __be32 1931 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1932 __be32 **p, int *buflen) 1933 { 1934 int status; 1935 1936 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1937 return nfserr_resource; 1938 if (whotype != NFS4_ACL_WHO_NAMED) 1939 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1940 else if (group) 1941 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1942 else 1943 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1944 if (status < 0) 1945 return nfserrno(status); 1946 *p = xdr_encode_opaque(*p, NULL, status); 1947 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1948 BUG_ON(*buflen < 0); 1949 return 0; 1950 } 1951 1952 static inline __be32 1953 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1954 { 1955 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1956 } 1957 1958 static inline __be32 1959 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1960 { 1961 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1962 } 1963 1964 static inline __be32 1965 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1966 __be32 **p, int *buflen) 1967 { 1968 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1969 } 1970 1971 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1972 FATTR4_WORD0_RDATTR_ERROR) 1973 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1974 1975 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1976 { 1977 /* As per referral draft: */ 1978 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1979 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1980 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1981 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1982 *rdattr_err = NFSERR_MOVED; 1983 else 1984 return nfserr_moved; 1985 } 1986 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1987 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1988 return 0; 1989 } 1990 1991 /* 1992 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1993 * ourselves. 1994 * 1995 * @countp is the buffer size in _words_; upon successful return this becomes 1996 * replaced with the number of words written. 1997 */ 1998 __be32 1999 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 2000 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 2001 struct svc_rqst *rqstp, int ignore_crossmnt) 2002 { 2003 u32 bmval0 = bmval[0]; 2004 u32 bmval1 = bmval[1]; 2005 u32 bmval2 = bmval[2]; 2006 struct kstat stat; 2007 struct svc_fh tempfh; 2008 struct kstatfs statfs; 2009 int buflen = *countp << 2; 2010 __be32 *attrlenp; 2011 u32 dummy; 2012 u64 dummy64; 2013 u32 rdattr_err = 0; 2014 __be32 *p = buffer; 2015 __be32 status; 2016 int err; 2017 int aclsupport = 0; 2018 struct nfs4_acl *acl = NULL; 2019 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2020 u32 minorversion = resp->cstate.minorversion; 2021 struct path path = { 2022 .mnt = exp->ex_path.mnt, 2023 .dentry = dentry, 2024 }; 2025 2026 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2027 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2028 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2029 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2030 2031 if (exp->ex_fslocs.migrated) { 2032 BUG_ON(bmval[2]); 2033 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 2034 if (status) 2035 goto out; 2036 } 2037 2038 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 2039 if (err) 2040 goto out_nfserr; 2041 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 2042 FATTR4_WORD0_MAXNAME)) || 2043 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2044 FATTR4_WORD1_SPACE_TOTAL))) { 2045 err = vfs_statfs(&path, &statfs); 2046 if (err) 2047 goto out_nfserr; 2048 } 2049 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2050 fh_init(&tempfh, NFS4_FHSIZE); 2051 status = fh_compose(&tempfh, exp, dentry, NULL); 2052 if (status) 2053 goto out; 2054 fhp = &tempfh; 2055 } 2056 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 2057 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 2058 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2059 aclsupport = (err == 0); 2060 if (bmval0 & FATTR4_WORD0_ACL) { 2061 if (err == -EOPNOTSUPP) 2062 bmval0 &= ~FATTR4_WORD0_ACL; 2063 else if (err == -EINVAL) { 2064 status = nfserr_attrnotsupp; 2065 goto out; 2066 } else if (err != 0) 2067 goto out_nfserr; 2068 } 2069 } 2070 2071 if (bmval2) { 2072 if ((buflen -= 16) < 0) 2073 goto out_resource; 2074 WRITE32(3); 2075 WRITE32(bmval0); 2076 WRITE32(bmval1); 2077 WRITE32(bmval2); 2078 } else if (bmval1) { 2079 if ((buflen -= 12) < 0) 2080 goto out_resource; 2081 WRITE32(2); 2082 WRITE32(bmval0); 2083 WRITE32(bmval1); 2084 } else { 2085 if ((buflen -= 8) < 0) 2086 goto out_resource; 2087 WRITE32(1); 2088 WRITE32(bmval0); 2089 } 2090 attrlenp = p++; /* to be backfilled later */ 2091 2092 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2093 u32 word0 = nfsd_suppattrs0(minorversion); 2094 u32 word1 = nfsd_suppattrs1(minorversion); 2095 u32 word2 = nfsd_suppattrs2(minorversion); 2096 2097 if (!aclsupport) 2098 word0 &= ~FATTR4_WORD0_ACL; 2099 if (!word2) { 2100 if ((buflen -= 12) < 0) 2101 goto out_resource; 2102 WRITE32(2); 2103 WRITE32(word0); 2104 WRITE32(word1); 2105 } else { 2106 if ((buflen -= 16) < 0) 2107 goto out_resource; 2108 WRITE32(3); 2109 WRITE32(word0); 2110 WRITE32(word1); 2111 WRITE32(word2); 2112 } 2113 } 2114 if (bmval0 & FATTR4_WORD0_TYPE) { 2115 if ((buflen -= 4) < 0) 2116 goto out_resource; 2117 dummy = nfs4_file_type(stat.mode); 2118 if (dummy == NF4BAD) 2119 goto out_serverfault; 2120 WRITE32(dummy); 2121 } 2122 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2123 if ((buflen -= 4) < 0) 2124 goto out_resource; 2125 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2126 WRITE32(NFS4_FH_PERSISTENT); 2127 else 2128 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 2129 } 2130 if (bmval0 & FATTR4_WORD0_CHANGE) { 2131 if ((buflen -= 8) < 0) 2132 goto out_resource; 2133 write_change(&p, &stat, dentry->d_inode); 2134 } 2135 if (bmval0 & FATTR4_WORD0_SIZE) { 2136 if ((buflen -= 8) < 0) 2137 goto out_resource; 2138 WRITE64(stat.size); 2139 } 2140 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2141 if ((buflen -= 4) < 0) 2142 goto out_resource; 2143 WRITE32(1); 2144 } 2145 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2146 if ((buflen -= 4) < 0) 2147 goto out_resource; 2148 WRITE32(1); 2149 } 2150 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2151 if ((buflen -= 4) < 0) 2152 goto out_resource; 2153 WRITE32(0); 2154 } 2155 if (bmval0 & FATTR4_WORD0_FSID) { 2156 if ((buflen -= 16) < 0) 2157 goto out_resource; 2158 if (exp->ex_fslocs.migrated) { 2159 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 2160 WRITE64(NFS4_REFERRAL_FSID_MINOR); 2161 } else switch(fsid_source(fhp)) { 2162 case FSIDSOURCE_FSID: 2163 WRITE64((u64)exp->ex_fsid); 2164 WRITE64((u64)0); 2165 break; 2166 case FSIDSOURCE_DEV: 2167 WRITE32(0); 2168 WRITE32(MAJOR(stat.dev)); 2169 WRITE32(0); 2170 WRITE32(MINOR(stat.dev)); 2171 break; 2172 case FSIDSOURCE_UUID: 2173 WRITEMEM(exp->ex_uuid, 16); 2174 break; 2175 } 2176 } 2177 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2178 if ((buflen -= 4) < 0) 2179 goto out_resource; 2180 WRITE32(0); 2181 } 2182 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2183 if ((buflen -= 4) < 0) 2184 goto out_resource; 2185 WRITE32(nfsd4_lease); 2186 } 2187 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2188 if ((buflen -= 4) < 0) 2189 goto out_resource; 2190 WRITE32(rdattr_err); 2191 } 2192 if (bmval0 & FATTR4_WORD0_ACL) { 2193 struct nfs4_ace *ace; 2194 2195 if (acl == NULL) { 2196 if ((buflen -= 4) < 0) 2197 goto out_resource; 2198 2199 WRITE32(0); 2200 goto out_acl; 2201 } 2202 if ((buflen -= 4) < 0) 2203 goto out_resource; 2204 WRITE32(acl->naces); 2205 2206 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2207 if ((buflen -= 4*3) < 0) 2208 goto out_resource; 2209 WRITE32(ace->type); 2210 WRITE32(ace->flag); 2211 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 2212 status = nfsd4_encode_aclname(rqstp, ace->whotype, 2213 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 2214 &p, &buflen); 2215 if (status == nfserr_resource) 2216 goto out_resource; 2217 if (status) 2218 goto out; 2219 } 2220 } 2221 out_acl: 2222 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2223 if ((buflen -= 4) < 0) 2224 goto out_resource; 2225 WRITE32(aclsupport ? 2226 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2227 } 2228 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2229 if ((buflen -= 4) < 0) 2230 goto out_resource; 2231 WRITE32(1); 2232 } 2233 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2234 if ((buflen -= 4) < 0) 2235 goto out_resource; 2236 WRITE32(1); 2237 } 2238 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2239 if ((buflen -= 4) < 0) 2240 goto out_resource; 2241 WRITE32(1); 2242 } 2243 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2244 if ((buflen -= 4) < 0) 2245 goto out_resource; 2246 WRITE32(1); 2247 } 2248 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2249 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 2250 if (buflen < 0) 2251 goto out_resource; 2252 WRITE32(fhp->fh_handle.fh_size); 2253 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 2254 } 2255 if (bmval0 & FATTR4_WORD0_FILEID) { 2256 if ((buflen -= 8) < 0) 2257 goto out_resource; 2258 WRITE64(stat.ino); 2259 } 2260 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2261 if ((buflen -= 8) < 0) 2262 goto out_resource; 2263 WRITE64((u64) statfs.f_ffree); 2264 } 2265 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2266 if ((buflen -= 8) < 0) 2267 goto out_resource; 2268 WRITE64((u64) statfs.f_ffree); 2269 } 2270 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2271 if ((buflen -= 8) < 0) 2272 goto out_resource; 2273 WRITE64((u64) statfs.f_files); 2274 } 2275 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2276 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 2277 if (status == nfserr_resource) 2278 goto out_resource; 2279 if (status) 2280 goto out; 2281 } 2282 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2283 if ((buflen -= 4) < 0) 2284 goto out_resource; 2285 WRITE32(1); 2286 } 2287 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2288 if ((buflen -= 8) < 0) 2289 goto out_resource; 2290 WRITE64(~(u64)0); 2291 } 2292 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2293 if ((buflen -= 4) < 0) 2294 goto out_resource; 2295 WRITE32(255); 2296 } 2297 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2298 if ((buflen -= 4) < 0) 2299 goto out_resource; 2300 WRITE32(statfs.f_namelen); 2301 } 2302 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2303 if ((buflen -= 8) < 0) 2304 goto out_resource; 2305 WRITE64((u64) svc_max_payload(rqstp)); 2306 } 2307 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2308 if ((buflen -= 8) < 0) 2309 goto out_resource; 2310 WRITE64((u64) svc_max_payload(rqstp)); 2311 } 2312 if (bmval1 & FATTR4_WORD1_MODE) { 2313 if ((buflen -= 4) < 0) 2314 goto out_resource; 2315 WRITE32(stat.mode & S_IALLUGO); 2316 } 2317 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2318 if ((buflen -= 4) < 0) 2319 goto out_resource; 2320 WRITE32(1); 2321 } 2322 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2323 if ((buflen -= 4) < 0) 2324 goto out_resource; 2325 WRITE32(stat.nlink); 2326 } 2327 if (bmval1 & FATTR4_WORD1_OWNER) { 2328 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2329 if (status == nfserr_resource) 2330 goto out_resource; 2331 if (status) 2332 goto out; 2333 } 2334 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2335 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2336 if (status == nfserr_resource) 2337 goto out_resource; 2338 if (status) 2339 goto out; 2340 } 2341 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2342 if ((buflen -= 8) < 0) 2343 goto out_resource; 2344 WRITE32((u32) MAJOR(stat.rdev)); 2345 WRITE32((u32) MINOR(stat.rdev)); 2346 } 2347 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2348 if ((buflen -= 8) < 0) 2349 goto out_resource; 2350 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2351 WRITE64(dummy64); 2352 } 2353 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2354 if ((buflen -= 8) < 0) 2355 goto out_resource; 2356 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2357 WRITE64(dummy64); 2358 } 2359 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2360 if ((buflen -= 8) < 0) 2361 goto out_resource; 2362 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2363 WRITE64(dummy64); 2364 } 2365 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2366 if ((buflen -= 8) < 0) 2367 goto out_resource; 2368 dummy64 = (u64)stat.blocks << 9; 2369 WRITE64(dummy64); 2370 } 2371 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2372 if ((buflen -= 12) < 0) 2373 goto out_resource; 2374 WRITE32(0); 2375 WRITE32(stat.atime.tv_sec); 2376 WRITE32(stat.atime.tv_nsec); 2377 } 2378 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2379 if ((buflen -= 12) < 0) 2380 goto out_resource; 2381 WRITE32(0); 2382 WRITE32(1); 2383 WRITE32(0); 2384 } 2385 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2386 if ((buflen -= 12) < 0) 2387 goto out_resource; 2388 WRITE32(0); 2389 WRITE32(stat.ctime.tv_sec); 2390 WRITE32(stat.ctime.tv_nsec); 2391 } 2392 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2393 if ((buflen -= 12) < 0) 2394 goto out_resource; 2395 WRITE32(0); 2396 WRITE32(stat.mtime.tv_sec); 2397 WRITE32(stat.mtime.tv_nsec); 2398 } 2399 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2400 if ((buflen -= 8) < 0) 2401 goto out_resource; 2402 /* 2403 * Get parent's attributes if not ignoring crossmount 2404 * and this is the root of a cross-mounted filesystem. 2405 */ 2406 if (ignore_crossmnt == 0 && 2407 dentry == exp->ex_path.mnt->mnt_root) { 2408 struct path path = exp->ex_path; 2409 path_get(&path); 2410 while (follow_up(&path)) { 2411 if (path.dentry != path.mnt->mnt_root) 2412 break; 2413 } 2414 err = vfs_getattr(path.mnt, path.dentry, &stat); 2415 path_put(&path); 2416 if (err) 2417 goto out_nfserr; 2418 } 2419 WRITE64(stat.ino); 2420 } 2421 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2422 WRITE32(3); 2423 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2424 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2425 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2426 } 2427 2428 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2429 *countp = p - buffer; 2430 status = nfs_ok; 2431 2432 out: 2433 kfree(acl); 2434 if (fhp == &tempfh) 2435 fh_put(&tempfh); 2436 return status; 2437 out_nfserr: 2438 status = nfserrno(err); 2439 goto out; 2440 out_resource: 2441 *countp = 0; 2442 status = nfserr_resource; 2443 goto out; 2444 out_serverfault: 2445 status = nfserr_serverfault; 2446 goto out; 2447 } 2448 2449 static inline int attributes_need_mount(u32 *bmval) 2450 { 2451 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2452 return 1; 2453 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2454 return 1; 2455 return 0; 2456 } 2457 2458 static __be32 2459 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2460 const char *name, int namlen, __be32 *p, int *buflen) 2461 { 2462 struct svc_export *exp = cd->rd_fhp->fh_export; 2463 struct dentry *dentry; 2464 __be32 nfserr; 2465 int ignore_crossmnt = 0; 2466 2467 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2468 if (IS_ERR(dentry)) 2469 return nfserrno(PTR_ERR(dentry)); 2470 if (!dentry->d_inode) { 2471 /* 2472 * nfsd_buffered_readdir drops the i_mutex between 2473 * readdir and calling this callback, leaving a window 2474 * where this directory entry could have gone away. 2475 */ 2476 dput(dentry); 2477 return nfserr_noent; 2478 } 2479 2480 exp_get(exp); 2481 /* 2482 * In the case of a mountpoint, the client may be asking for 2483 * attributes that are only properties of the underlying filesystem 2484 * as opposed to the cross-mounted file system. In such a case, 2485 * we will not follow the cross mount and will fill the attribtutes 2486 * directly from the mountpoint dentry. 2487 */ 2488 if (nfsd_mountpoint(dentry, exp)) { 2489 int err; 2490 2491 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2492 && !attributes_need_mount(cd->rd_bmval)) { 2493 ignore_crossmnt = 1; 2494 goto out_encode; 2495 } 2496 /* 2497 * Why the heck aren't we just using nfsd_lookup?? 2498 * Different "."/".." handling? Something else? 2499 * At least, add a comment here to explain.... 2500 */ 2501 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2502 if (err) { 2503 nfserr = nfserrno(err); 2504 goto out_put; 2505 } 2506 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2507 if (nfserr) 2508 goto out_put; 2509 2510 } 2511 out_encode: 2512 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2513 cd->rd_rqstp, ignore_crossmnt); 2514 out_put: 2515 dput(dentry); 2516 exp_put(exp); 2517 return nfserr; 2518 } 2519 2520 static __be32 * 2521 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2522 { 2523 __be32 *attrlenp; 2524 2525 if (buflen < 6) 2526 return NULL; 2527 *p++ = htonl(2); 2528 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2529 *p++ = htonl(0); /* bmval1 */ 2530 2531 attrlenp = p++; 2532 *p++ = nfserr; /* no htonl */ 2533 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2534 return p; 2535 } 2536 2537 static int 2538 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2539 loff_t offset, u64 ino, unsigned int d_type) 2540 { 2541 struct readdir_cd *ccd = ccdv; 2542 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2543 int buflen; 2544 __be32 *p = cd->buffer; 2545 __be32 *cookiep; 2546 __be32 nfserr = nfserr_toosmall; 2547 2548 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2549 if (name && isdotent(name, namlen)) { 2550 cd->common.err = nfs_ok; 2551 return 0; 2552 } 2553 2554 if (cd->offset) 2555 xdr_encode_hyper(cd->offset, (u64) offset); 2556 2557 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2558 if (buflen < 0) 2559 goto fail; 2560 2561 *p++ = xdr_one; /* mark entry present */ 2562 cookiep = p; 2563 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2564 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2565 2566 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2567 switch (nfserr) { 2568 case nfs_ok: 2569 p += buflen; 2570 break; 2571 case nfserr_resource: 2572 nfserr = nfserr_toosmall; 2573 goto fail; 2574 case nfserr_noent: 2575 goto skip_entry; 2576 default: 2577 /* 2578 * If the client requested the RDATTR_ERROR attribute, 2579 * we stuff the error code into this attribute 2580 * and continue. If this attribute was not requested, 2581 * then in accordance with the spec, we fail the 2582 * entire READDIR operation(!) 2583 */ 2584 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2585 goto fail; 2586 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2587 if (p == NULL) { 2588 nfserr = nfserr_toosmall; 2589 goto fail; 2590 } 2591 } 2592 cd->buflen -= (p - cd->buffer); 2593 cd->buffer = p; 2594 cd->offset = cookiep; 2595 skip_entry: 2596 cd->common.err = nfs_ok; 2597 return 0; 2598 fail: 2599 cd->common.err = nfserr; 2600 return -EINVAL; 2601 } 2602 2603 static void 2604 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2605 { 2606 __be32 *p; 2607 2608 RESERVE_SPACE(sizeof(stateid_t)); 2609 WRITE32(sid->si_generation); 2610 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2611 ADJUST_ARGS(); 2612 } 2613 2614 static __be32 2615 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2616 { 2617 __be32 *p; 2618 2619 if (!nfserr) { 2620 RESERVE_SPACE(8); 2621 WRITE32(access->ac_supported); 2622 WRITE32(access->ac_resp_access); 2623 ADJUST_ARGS(); 2624 } 2625 return nfserr; 2626 } 2627 2628 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2629 { 2630 __be32 *p; 2631 2632 if (!nfserr) { 2633 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); 2634 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2635 WRITE32(bcts->dir); 2636 /* XXX: ? */ 2637 WRITE32(0); 2638 ADJUST_ARGS(); 2639 } 2640 return nfserr; 2641 } 2642 2643 static __be32 2644 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2645 { 2646 ENCODE_SEQID_OP_HEAD; 2647 2648 if (!nfserr) 2649 nfsd4_encode_stateid(resp, &close->cl_stateid); 2650 2651 encode_seqid_op_tail(resp, save, nfserr); 2652 return nfserr; 2653 } 2654 2655 2656 static __be32 2657 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2658 { 2659 __be32 *p; 2660 2661 if (!nfserr) { 2662 RESERVE_SPACE(NFS4_VERIFIER_SIZE); 2663 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE); 2664 ADJUST_ARGS(); 2665 } 2666 return nfserr; 2667 } 2668 2669 static __be32 2670 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2671 { 2672 __be32 *p; 2673 2674 if (!nfserr) { 2675 RESERVE_SPACE(32); 2676 write_cinfo(&p, &create->cr_cinfo); 2677 WRITE32(2); 2678 WRITE32(create->cr_bmval[0]); 2679 WRITE32(create->cr_bmval[1]); 2680 ADJUST_ARGS(); 2681 } 2682 return nfserr; 2683 } 2684 2685 static __be32 2686 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2687 { 2688 struct svc_fh *fhp = getattr->ga_fhp; 2689 int buflen; 2690 2691 if (nfserr) 2692 return nfserr; 2693 2694 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2695 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2696 resp->p, &buflen, getattr->ga_bmval, 2697 resp->rqstp, 0); 2698 if (!nfserr) 2699 resp->p += buflen; 2700 return nfserr; 2701 } 2702 2703 static __be32 2704 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2705 { 2706 struct svc_fh *fhp = *fhpp; 2707 unsigned int len; 2708 __be32 *p; 2709 2710 if (!nfserr) { 2711 len = fhp->fh_handle.fh_size; 2712 RESERVE_SPACE(len + 4); 2713 WRITE32(len); 2714 WRITEMEM(&fhp->fh_handle.fh_base, len); 2715 ADJUST_ARGS(); 2716 } 2717 return nfserr; 2718 } 2719 2720 /* 2721 * Including all fields other than the name, a LOCK4denied structure requires 2722 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2723 */ 2724 static void 2725 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2726 { 2727 struct xdr_netobj *conf = &ld->ld_owner; 2728 __be32 *p; 2729 2730 RESERVE_SPACE(32 + XDR_LEN(conf->len)); 2731 WRITE64(ld->ld_start); 2732 WRITE64(ld->ld_length); 2733 WRITE32(ld->ld_type); 2734 if (conf->len) { 2735 WRITEMEM(&ld->ld_clientid, 8); 2736 WRITE32(conf->len); 2737 WRITEMEM(conf->data, conf->len); 2738 kfree(conf->data); 2739 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2740 WRITE64((u64)0); /* clientid */ 2741 WRITE32(0); /* length of owner name */ 2742 } 2743 ADJUST_ARGS(); 2744 } 2745 2746 static __be32 2747 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2748 { 2749 ENCODE_SEQID_OP_HEAD; 2750 2751 if (!nfserr) 2752 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2753 else if (nfserr == nfserr_denied) 2754 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2755 2756 encode_seqid_op_tail(resp, save, nfserr); 2757 return nfserr; 2758 } 2759 2760 static __be32 2761 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2762 { 2763 if (nfserr == nfserr_denied) 2764 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2765 return nfserr; 2766 } 2767 2768 static __be32 2769 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2770 { 2771 ENCODE_SEQID_OP_HEAD; 2772 2773 if (!nfserr) 2774 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2775 2776 encode_seqid_op_tail(resp, save, nfserr); 2777 return nfserr; 2778 } 2779 2780 2781 static __be32 2782 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2783 { 2784 __be32 *p; 2785 2786 if (!nfserr) { 2787 RESERVE_SPACE(20); 2788 write_cinfo(&p, &link->li_cinfo); 2789 ADJUST_ARGS(); 2790 } 2791 return nfserr; 2792 } 2793 2794 2795 static __be32 2796 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2797 { 2798 __be32 *p; 2799 ENCODE_SEQID_OP_HEAD; 2800 2801 if (nfserr) 2802 goto out; 2803 2804 nfsd4_encode_stateid(resp, &open->op_stateid); 2805 RESERVE_SPACE(40); 2806 write_cinfo(&p, &open->op_cinfo); 2807 WRITE32(open->op_rflags); 2808 WRITE32(2); 2809 WRITE32(open->op_bmval[0]); 2810 WRITE32(open->op_bmval[1]); 2811 WRITE32(open->op_delegate_type); 2812 ADJUST_ARGS(); 2813 2814 switch (open->op_delegate_type) { 2815 case NFS4_OPEN_DELEGATE_NONE: 2816 break; 2817 case NFS4_OPEN_DELEGATE_READ: 2818 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2819 RESERVE_SPACE(20); 2820 WRITE32(open->op_recall); 2821 2822 /* 2823 * TODO: ACE's in delegations 2824 */ 2825 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2826 WRITE32(0); 2827 WRITE32(0); 2828 WRITE32(0); /* XXX: is NULL principal ok? */ 2829 ADJUST_ARGS(); 2830 break; 2831 case NFS4_OPEN_DELEGATE_WRITE: 2832 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2833 RESERVE_SPACE(32); 2834 WRITE32(0); 2835 2836 /* 2837 * TODO: space_limit's in delegations 2838 */ 2839 WRITE32(NFS4_LIMIT_SIZE); 2840 WRITE32(~(u32)0); 2841 WRITE32(~(u32)0); 2842 2843 /* 2844 * TODO: ACE's in delegations 2845 */ 2846 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2847 WRITE32(0); 2848 WRITE32(0); 2849 WRITE32(0); /* XXX: is NULL principal ok? */ 2850 ADJUST_ARGS(); 2851 break; 2852 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 2853 switch (open->op_why_no_deleg) { 2854 case WND4_CONTENTION: 2855 case WND4_RESOURCE: 2856 RESERVE_SPACE(8); 2857 WRITE32(open->op_why_no_deleg); 2858 WRITE32(0); /* deleg signaling not supported yet */ 2859 break; 2860 default: 2861 RESERVE_SPACE(4); 2862 WRITE32(open->op_why_no_deleg); 2863 } 2864 ADJUST_ARGS(); 2865 break; 2866 default: 2867 BUG(); 2868 } 2869 /* XXX save filehandle here */ 2870 out: 2871 encode_seqid_op_tail(resp, save, nfserr); 2872 return nfserr; 2873 } 2874 2875 static __be32 2876 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2877 { 2878 ENCODE_SEQID_OP_HEAD; 2879 2880 if (!nfserr) 2881 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2882 2883 encode_seqid_op_tail(resp, save, nfserr); 2884 return nfserr; 2885 } 2886 2887 static __be32 2888 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2889 { 2890 ENCODE_SEQID_OP_HEAD; 2891 2892 if (!nfserr) 2893 nfsd4_encode_stateid(resp, &od->od_stateid); 2894 2895 encode_seqid_op_tail(resp, save, nfserr); 2896 return nfserr; 2897 } 2898 2899 static __be32 2900 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2901 struct nfsd4_read *read) 2902 { 2903 u32 eof; 2904 int v, pn; 2905 unsigned long maxcount; 2906 long len; 2907 __be32 *p; 2908 2909 if (nfserr) 2910 return nfserr; 2911 if (resp->xbuf->page_len) 2912 return nfserr_resource; 2913 2914 RESERVE_SPACE(8); /* eof flag and byte count */ 2915 2916 maxcount = svc_max_payload(resp->rqstp); 2917 if (maxcount > read->rd_length) 2918 maxcount = read->rd_length; 2919 2920 len = maxcount; 2921 v = 0; 2922 while (len > 0) { 2923 pn = resp->rqstp->rq_resused++; 2924 resp->rqstp->rq_vec[v].iov_base = 2925 page_address(resp->rqstp->rq_respages[pn]); 2926 resp->rqstp->rq_vec[v].iov_len = 2927 len < PAGE_SIZE ? len : PAGE_SIZE; 2928 v++; 2929 len -= PAGE_SIZE; 2930 } 2931 read->rd_vlen = v; 2932 2933 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2934 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2935 &maxcount); 2936 2937 if (nfserr) 2938 return nfserr; 2939 eof = (read->rd_offset + maxcount >= 2940 read->rd_fhp->fh_dentry->d_inode->i_size); 2941 2942 WRITE32(eof); 2943 WRITE32(maxcount); 2944 ADJUST_ARGS(); 2945 resp->xbuf->head[0].iov_len = (char*)p 2946 - (char*)resp->xbuf->head[0].iov_base; 2947 resp->xbuf->page_len = maxcount; 2948 2949 /* Use rest of head for padding and remaining ops: */ 2950 resp->xbuf->tail[0].iov_base = p; 2951 resp->xbuf->tail[0].iov_len = 0; 2952 if (maxcount&3) { 2953 RESERVE_SPACE(4); 2954 WRITE32(0); 2955 resp->xbuf->tail[0].iov_base += maxcount&3; 2956 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2957 ADJUST_ARGS(); 2958 } 2959 return 0; 2960 } 2961 2962 static __be32 2963 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2964 { 2965 int maxcount; 2966 char *page; 2967 __be32 *p; 2968 2969 if (nfserr) 2970 return nfserr; 2971 if (resp->xbuf->page_len) 2972 return nfserr_resource; 2973 2974 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2975 2976 maxcount = PAGE_SIZE; 2977 RESERVE_SPACE(4); 2978 2979 /* 2980 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2981 * if they would overflow the buffer. Is this kosher in NFSv4? If 2982 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2983 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2984 */ 2985 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2986 if (nfserr == nfserr_isdir) 2987 return nfserr_inval; 2988 if (nfserr) 2989 return nfserr; 2990 2991 WRITE32(maxcount); 2992 ADJUST_ARGS(); 2993 resp->xbuf->head[0].iov_len = (char*)p 2994 - (char*)resp->xbuf->head[0].iov_base; 2995 resp->xbuf->page_len = maxcount; 2996 2997 /* Use rest of head for padding and remaining ops: */ 2998 resp->xbuf->tail[0].iov_base = p; 2999 resp->xbuf->tail[0].iov_len = 0; 3000 if (maxcount&3) { 3001 RESERVE_SPACE(4); 3002 WRITE32(0); 3003 resp->xbuf->tail[0].iov_base += maxcount&3; 3004 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 3005 ADJUST_ARGS(); 3006 } 3007 return 0; 3008 } 3009 3010 static __be32 3011 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3012 { 3013 int maxcount; 3014 loff_t offset; 3015 __be32 *page, *savep, *tailbase; 3016 __be32 *p; 3017 3018 if (nfserr) 3019 return nfserr; 3020 if (resp->xbuf->page_len) 3021 return nfserr_resource; 3022 3023 RESERVE_SPACE(NFS4_VERIFIER_SIZE); 3024 savep = p; 3025 3026 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3027 WRITE32(0); 3028 WRITE32(0); 3029 ADJUST_ARGS(); 3030 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 3031 tailbase = p; 3032 3033 maxcount = PAGE_SIZE; 3034 if (maxcount > readdir->rd_maxcount) 3035 maxcount = readdir->rd_maxcount; 3036 3037 /* 3038 * Convert from bytes to words, account for the two words already 3039 * written, make sure to leave two words at the end for the next 3040 * pointer and eof field. 3041 */ 3042 maxcount = (maxcount >> 2) - 4; 3043 if (maxcount < 0) { 3044 nfserr = nfserr_toosmall; 3045 goto err_no_verf; 3046 } 3047 3048 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 3049 readdir->common.err = 0; 3050 readdir->buflen = maxcount; 3051 readdir->buffer = page; 3052 readdir->offset = NULL; 3053 3054 offset = readdir->rd_cookie; 3055 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3056 &offset, 3057 &readdir->common, nfsd4_encode_dirent); 3058 if (nfserr == nfs_ok && 3059 readdir->common.err == nfserr_toosmall && 3060 readdir->buffer == page) 3061 nfserr = nfserr_toosmall; 3062 if (nfserr) 3063 goto err_no_verf; 3064 3065 if (readdir->offset) 3066 xdr_encode_hyper(readdir->offset, offset); 3067 3068 p = readdir->buffer; 3069 *p++ = 0; /* no more entries */ 3070 *p++ = htonl(readdir->common.err == nfserr_eof); 3071 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 3072 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 3073 3074 /* Use rest of head for padding and remaining ops: */ 3075 resp->xbuf->tail[0].iov_base = tailbase; 3076 resp->xbuf->tail[0].iov_len = 0; 3077 resp->p = resp->xbuf->tail[0].iov_base; 3078 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 3079 3080 return 0; 3081 err_no_verf: 3082 p = savep; 3083 ADJUST_ARGS(); 3084 return nfserr; 3085 } 3086 3087 static __be32 3088 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3089 { 3090 __be32 *p; 3091 3092 if (!nfserr) { 3093 RESERVE_SPACE(20); 3094 write_cinfo(&p, &remove->rm_cinfo); 3095 ADJUST_ARGS(); 3096 } 3097 return nfserr; 3098 } 3099 3100 static __be32 3101 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3102 { 3103 __be32 *p; 3104 3105 if (!nfserr) { 3106 RESERVE_SPACE(40); 3107 write_cinfo(&p, &rename->rn_sinfo); 3108 write_cinfo(&p, &rename->rn_tinfo); 3109 ADJUST_ARGS(); 3110 } 3111 return nfserr; 3112 } 3113 3114 static __be32 3115 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, 3116 __be32 nfserr,struct svc_export *exp) 3117 { 3118 int i = 0; 3119 u32 nflavs; 3120 struct exp_flavor_info *flavs; 3121 struct exp_flavor_info def_flavs[2]; 3122 __be32 *p; 3123 3124 if (nfserr) 3125 goto out; 3126 if (exp->ex_nflavors) { 3127 flavs = exp->ex_flavors; 3128 nflavs = exp->ex_nflavors; 3129 } else { /* Handling of some defaults in absence of real secinfo: */ 3130 flavs = def_flavs; 3131 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3132 nflavs = 2; 3133 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3134 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3135 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3136 nflavs = 1; 3137 flavs[0].pseudoflavor 3138 = svcauth_gss_flavor(exp->ex_client); 3139 } else { 3140 nflavs = 1; 3141 flavs[0].pseudoflavor 3142 = exp->ex_client->flavour->flavour; 3143 } 3144 } 3145 3146 RESERVE_SPACE(4); 3147 WRITE32(nflavs); 3148 ADJUST_ARGS(); 3149 for (i = 0; i < nflavs; i++) { 3150 u32 flav = flavs[i].pseudoflavor; 3151 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 3152 3153 if (gm) { 3154 RESERVE_SPACE(4); 3155 WRITE32(RPC_AUTH_GSS); 3156 ADJUST_ARGS(); 3157 RESERVE_SPACE(4 + gm->gm_oid.len); 3158 WRITE32(gm->gm_oid.len); 3159 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 3160 ADJUST_ARGS(); 3161 RESERVE_SPACE(4); 3162 WRITE32(0); /* qop */ 3163 ADJUST_ARGS(); 3164 RESERVE_SPACE(4); 3165 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 3166 ADJUST_ARGS(); 3167 gss_mech_put(gm); 3168 } else { 3169 RESERVE_SPACE(4); 3170 WRITE32(flav); 3171 ADJUST_ARGS(); 3172 } 3173 } 3174 out: 3175 if (exp) 3176 exp_put(exp); 3177 return nfserr; 3178 } 3179 3180 static __be32 3181 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3182 struct nfsd4_secinfo *secinfo) 3183 { 3184 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); 3185 } 3186 3187 static __be32 3188 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3189 struct nfsd4_secinfo_no_name *secinfo) 3190 { 3191 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); 3192 } 3193 3194 /* 3195 * The SETATTR encode routine is special -- it always encodes a bitmap, 3196 * regardless of the error status. 3197 */ 3198 static __be32 3199 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3200 { 3201 __be32 *p; 3202 3203 RESERVE_SPACE(12); 3204 if (nfserr) { 3205 WRITE32(2); 3206 WRITE32(0); 3207 WRITE32(0); 3208 } 3209 else { 3210 WRITE32(2); 3211 WRITE32(setattr->sa_bmval[0]); 3212 WRITE32(setattr->sa_bmval[1]); 3213 } 3214 ADJUST_ARGS(); 3215 return nfserr; 3216 } 3217 3218 static __be32 3219 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3220 { 3221 __be32 *p; 3222 3223 if (!nfserr) { 3224 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE); 3225 WRITEMEM(&scd->se_clientid, 8); 3226 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE); 3227 ADJUST_ARGS(); 3228 } 3229 else if (nfserr == nfserr_clid_inuse) { 3230 RESERVE_SPACE(8); 3231 WRITE32(0); 3232 WRITE32(0); 3233 ADJUST_ARGS(); 3234 } 3235 return nfserr; 3236 } 3237 3238 static __be32 3239 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3240 { 3241 __be32 *p; 3242 3243 if (!nfserr) { 3244 RESERVE_SPACE(16); 3245 WRITE32(write->wr_bytes_written); 3246 WRITE32(write->wr_how_written); 3247 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE); 3248 ADJUST_ARGS(); 3249 } 3250 return nfserr; 3251 } 3252 3253 static __be32 3254 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 3255 struct nfsd4_exchange_id *exid) 3256 { 3257 __be32 *p; 3258 char *major_id; 3259 char *server_scope; 3260 int major_id_sz; 3261 int server_scope_sz; 3262 uint64_t minor_id = 0; 3263 3264 if (nfserr) 3265 return nfserr; 3266 3267 major_id = utsname()->nodename; 3268 major_id_sz = strlen(major_id); 3269 server_scope = utsname()->nodename; 3270 server_scope_sz = strlen(server_scope); 3271 3272 RESERVE_SPACE( 3273 8 /* eir_clientid */ + 3274 4 /* eir_sequenceid */ + 3275 4 /* eir_flags */ + 3276 4 /* spr_how (SP4_NONE) */ + 3277 8 /* so_minor_id */ + 3278 4 /* so_major_id.len */ + 3279 (XDR_QUADLEN(major_id_sz) * 4) + 3280 4 /* eir_server_scope.len */ + 3281 (XDR_QUADLEN(server_scope_sz) * 4) + 3282 4 /* eir_server_impl_id.count (0) */); 3283 3284 WRITEMEM(&exid->clientid, 8); 3285 WRITE32(exid->seqid); 3286 WRITE32(exid->flags); 3287 3288 /* state_protect4_r. Currently only support SP4_NONE */ 3289 BUG_ON(exid->spa_how != SP4_NONE); 3290 WRITE32(exid->spa_how); 3291 3292 /* The server_owner struct */ 3293 WRITE64(minor_id); /* Minor id */ 3294 /* major id */ 3295 WRITE32(major_id_sz); 3296 WRITEMEM(major_id, major_id_sz); 3297 3298 /* Server scope */ 3299 WRITE32(server_scope_sz); 3300 WRITEMEM(server_scope, server_scope_sz); 3301 3302 /* Implementation id */ 3303 WRITE32(0); /* zero length nfs_impl_id4 array */ 3304 ADJUST_ARGS(); 3305 return 0; 3306 } 3307 3308 static __be32 3309 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 3310 struct nfsd4_create_session *sess) 3311 { 3312 __be32 *p; 3313 3314 if (nfserr) 3315 return nfserr; 3316 3317 RESERVE_SPACE(24); 3318 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3319 WRITE32(sess->seqid); 3320 WRITE32(sess->flags); 3321 ADJUST_ARGS(); 3322 3323 RESERVE_SPACE(28); 3324 WRITE32(0); /* headerpadsz */ 3325 WRITE32(sess->fore_channel.maxreq_sz); 3326 WRITE32(sess->fore_channel.maxresp_sz); 3327 WRITE32(sess->fore_channel.maxresp_cached); 3328 WRITE32(sess->fore_channel.maxops); 3329 WRITE32(sess->fore_channel.maxreqs); 3330 WRITE32(sess->fore_channel.nr_rdma_attrs); 3331 ADJUST_ARGS(); 3332 3333 if (sess->fore_channel.nr_rdma_attrs) { 3334 RESERVE_SPACE(4); 3335 WRITE32(sess->fore_channel.rdma_attrs); 3336 ADJUST_ARGS(); 3337 } 3338 3339 RESERVE_SPACE(28); 3340 WRITE32(0); /* headerpadsz */ 3341 WRITE32(sess->back_channel.maxreq_sz); 3342 WRITE32(sess->back_channel.maxresp_sz); 3343 WRITE32(sess->back_channel.maxresp_cached); 3344 WRITE32(sess->back_channel.maxops); 3345 WRITE32(sess->back_channel.maxreqs); 3346 WRITE32(sess->back_channel.nr_rdma_attrs); 3347 ADJUST_ARGS(); 3348 3349 if (sess->back_channel.nr_rdma_attrs) { 3350 RESERVE_SPACE(4); 3351 WRITE32(sess->back_channel.rdma_attrs); 3352 ADJUST_ARGS(); 3353 } 3354 return 0; 3355 } 3356 3357 static __be32 3358 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3359 struct nfsd4_destroy_session *destroy_session) 3360 { 3361 return nfserr; 3362 } 3363 3364 static __be32 3365 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr, 3366 struct nfsd4_free_stateid *free_stateid) 3367 { 3368 __be32 *p; 3369 3370 if (nfserr) 3371 return nfserr; 3372 3373 RESERVE_SPACE(4); 3374 WRITE32(nfserr); 3375 ADJUST_ARGS(); 3376 return nfserr; 3377 } 3378 3379 static __be32 3380 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3381 struct nfsd4_sequence *seq) 3382 { 3383 __be32 *p; 3384 3385 if (nfserr) 3386 return nfserr; 3387 3388 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3389 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3390 WRITE32(seq->seqid); 3391 WRITE32(seq->slotid); 3392 /* Note slotid's are numbered from zero: */ 3393 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ 3394 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ 3395 WRITE32(seq->status_flags); 3396 3397 ADJUST_ARGS(); 3398 resp->cstate.datap = p; /* DRC cache data pointer */ 3399 return 0; 3400 } 3401 3402 __be32 3403 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr, 3404 struct nfsd4_test_stateid *test_stateid) 3405 { 3406 struct nfsd4_test_stateid_id *stateid, *next; 3407 __be32 *p; 3408 3409 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids)); 3410 *p++ = htonl(test_stateid->ts_num_ids); 3411 3412 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 3413 *p++ = stateid->ts_id_status; 3414 } 3415 3416 ADJUST_ARGS(); 3417 return nfserr; 3418 } 3419 3420 static __be32 3421 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3422 { 3423 return nfserr; 3424 } 3425 3426 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3427 3428 /* 3429 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3430 * since we don't need to filter out obsolete ops as this is 3431 * done in the decoding phase. 3432 */ 3433 static nfsd4_enc nfsd4_enc_ops[] = { 3434 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3435 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3436 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3437 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3438 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3439 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3440 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3441 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3442 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3443 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3444 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3445 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3446 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3447 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3448 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3449 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3450 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3451 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3452 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3453 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3454 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3455 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3456 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3457 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3458 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3459 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3460 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3461 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3462 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3463 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3464 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3465 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3466 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3467 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3468 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3469 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3470 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3471 3472 /* NFSv4.1 operations */ 3473 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3474 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 3475 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3476 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3477 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3478 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, 3479 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3480 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3481 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3482 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3483 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3484 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3485 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 3486 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3487 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3488 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 3489 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3490 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3491 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3492 }; 3493 3494 /* 3495 * Calculate the total amount of memory that the compound response has taken 3496 * after encoding the current operation with pad. 3497 * 3498 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() 3499 * which was specified at nfsd4_operation, else pad is zero. 3500 * 3501 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. 3502 * 3503 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3504 * will be at least a page and will therefore hold the xdr_buf head. 3505 */ 3506 int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) 3507 { 3508 struct xdr_buf *xb = &resp->rqstp->rq_res; 3509 struct nfsd4_session *session = NULL; 3510 struct nfsd4_slot *slot = resp->cstate.slot; 3511 u32 length, tlen = 0; 3512 3513 if (!nfsd4_has_session(&resp->cstate)) 3514 return 0; 3515 3516 session = resp->cstate.session; 3517 if (session == NULL) 3518 return 0; 3519 3520 if (xb->page_len == 0) { 3521 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3522 } else { 3523 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3524 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3525 3526 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3527 } 3528 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3529 length, xb->page_len, tlen, pad); 3530 3531 if (length > session->se_fchannel.maxresp_sz) 3532 return nfserr_rep_too_big; 3533 3534 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) && 3535 length > session->se_fchannel.maxresp_cached) 3536 return nfserr_rep_too_big_to_cache; 3537 3538 return 0; 3539 } 3540 3541 void 3542 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3543 { 3544 __be32 *statp; 3545 __be32 *p; 3546 3547 RESERVE_SPACE(8); 3548 WRITE32(op->opnum); 3549 statp = p++; /* to be backfilled at the end */ 3550 ADJUST_ARGS(); 3551 3552 if (op->opnum == OP_ILLEGAL) 3553 goto status; 3554 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3555 !nfsd4_enc_ops[op->opnum]); 3556 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3557 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3558 if (!op->status) 3559 op->status = nfsd4_check_resp_size(resp, 0); 3560 status: 3561 /* 3562 * Note: We write the status directly, instead of using WRITE32(), 3563 * since it is already in network byte order. 3564 */ 3565 *statp = op->status; 3566 } 3567 3568 /* 3569 * Encode the reply stored in the stateowner reply cache 3570 * 3571 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3572 * previously sent already encoded operation. 3573 * 3574 * called with nfs4_lock_state() held 3575 */ 3576 void 3577 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3578 { 3579 __be32 *p; 3580 struct nfs4_replay *rp = op->replay; 3581 3582 BUG_ON(!rp); 3583 3584 RESERVE_SPACE(8); 3585 WRITE32(op->opnum); 3586 *p++ = rp->rp_status; /* already xdr'ed */ 3587 ADJUST_ARGS(); 3588 3589 RESERVE_SPACE(rp->rp_buflen); 3590 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3591 ADJUST_ARGS(); 3592 } 3593 3594 int 3595 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3596 { 3597 return xdr_ressize_check(rqstp, p); 3598 } 3599 3600 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 3601 { 3602 struct svc_rqst *rqstp = rq; 3603 struct nfsd4_compoundargs *args = rqstp->rq_argp; 3604 3605 if (args->ops != args->iops) { 3606 kfree(args->ops); 3607 args->ops = args->iops; 3608 } 3609 kfree(args->tmpp); 3610 args->tmpp = NULL; 3611 while (args->to_free) { 3612 struct tmpbuf *tb = args->to_free; 3613 args->to_free = tb->next; 3614 tb->release(tb->buf); 3615 kfree(tb); 3616 } 3617 return 1; 3618 } 3619 3620 int 3621 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3622 { 3623 args->p = p; 3624 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3625 args->pagelist = rqstp->rq_arg.pages; 3626 args->pagelen = rqstp->rq_arg.page_len; 3627 args->tmpp = NULL; 3628 args->to_free = NULL; 3629 args->ops = args->iops; 3630 args->rqstp = rqstp; 3631 3632 return !nfsd4_decode_compound(args); 3633 } 3634 3635 int 3636 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3637 { 3638 /* 3639 * All that remains is to write the tag and operation count... 3640 */ 3641 struct nfsd4_compound_state *cs = &resp->cstate; 3642 struct kvec *iov; 3643 p = resp->tagp; 3644 *p++ = htonl(resp->taglen); 3645 memcpy(p, resp->tag, resp->taglen); 3646 p += XDR_QUADLEN(resp->taglen); 3647 *p++ = htonl(resp->opcnt); 3648 3649 if (rqstp->rq_res.page_len) 3650 iov = &rqstp->rq_res.tail[0]; 3651 else 3652 iov = &rqstp->rq_res.head[0]; 3653 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3654 BUG_ON(iov->iov_len > PAGE_SIZE); 3655 if (nfsd4_has_session(cs)) { 3656 if (cs->status != nfserr_replay_cache) { 3657 nfsd4_store_cache_entry(resp); 3658 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; 3659 } 3660 /* Renew the clientid on success and on replay */ 3661 release_session_client(cs->session); 3662 nfsd4_put_session(cs->session); 3663 } 3664 return 1; 3665 } 3666 3667 /* 3668 * Local variables: 3669 * c-basic-offset: 8 3670 * End: 3671 */ 3672