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 36 #include <linux/file.h> 37 #include <linux/slab.h> 38 #include <linux/namei.h> 39 #include <linux/statfs.h> 40 #include <linux/utsname.h> 41 #include <linux/pagemap.h> 42 #include <linux/sunrpc/svcauth_gss.h> 43 44 #include "idmap.h" 45 #include "acl.h" 46 #include "xdr4.h" 47 #include "vfs.h" 48 #include "state.h" 49 #include "cache.h" 50 #include "netns.h" 51 #include "pnfs.h" 52 #include "filecache.h" 53 54 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 55 #include <linux/security.h> 56 #endif 57 58 59 #define NFSDDBG_FACILITY NFSDDBG_XDR 60 61 const u32 nfsd_suppattrs[3][3] = { 62 {NFSD4_SUPPORTED_ATTRS_WORD0, 63 NFSD4_SUPPORTED_ATTRS_WORD1, 64 NFSD4_SUPPORTED_ATTRS_WORD2}, 65 66 {NFSD4_1_SUPPORTED_ATTRS_WORD0, 67 NFSD4_1_SUPPORTED_ATTRS_WORD1, 68 NFSD4_1_SUPPORTED_ATTRS_WORD2}, 69 70 {NFSD4_1_SUPPORTED_ATTRS_WORD0, 71 NFSD4_1_SUPPORTED_ATTRS_WORD1, 72 NFSD4_2_SUPPORTED_ATTRS_WORD2}, 73 }; 74 75 /* 76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 77 * directory in order to indicate to the client that a filesystem boundary is present 78 * We use a fixed fsid for a referral 79 */ 80 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 81 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 82 83 static __be32 84 check_filename(char *str, int len) 85 { 86 int i; 87 88 if (len == 0) 89 return nfserr_inval; 90 if (isdotent(str, len)) 91 return nfserr_badname; 92 for (i = 0; i < len; i++) 93 if (str[i] == '/') 94 return nfserr_badname; 95 return 0; 96 } 97 98 #define DECODE_HEAD \ 99 __be32 *p; \ 100 __be32 status 101 #define DECODE_TAIL \ 102 status = 0; \ 103 out: \ 104 return status; \ 105 xdr_error: \ 106 dprintk("NFSD: xdr error (%s:%d)\n", \ 107 __FILE__, __LINE__); \ 108 status = nfserr_bad_xdr; \ 109 goto out 110 111 #define READMEM(x,nbytes) do { \ 112 x = (char *)p; \ 113 p += XDR_QUADLEN(nbytes); \ 114 } while (0) 115 #define SAVEMEM(x,nbytes) do { \ 116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 117 savemem(argp, p, nbytes) : \ 118 (char *)p)) { \ 119 dprintk("NFSD: xdr error (%s:%d)\n", \ 120 __FILE__, __LINE__); \ 121 goto xdr_error; \ 122 } \ 123 p += XDR_QUADLEN(nbytes); \ 124 } while (0) 125 #define COPYMEM(x,nbytes) do { \ 126 memcpy((x), p, nbytes); \ 127 p += XDR_QUADLEN(nbytes); \ 128 } while (0) 129 130 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 131 #define READ_BUF(nbytes) do { \ 132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 133 p = argp->p; \ 134 argp->p += XDR_QUADLEN(nbytes); \ 135 } else if (!(p = read_buf(argp, nbytes))) { \ 136 dprintk("NFSD: xdr error (%s:%d)\n", \ 137 __FILE__, __LINE__); \ 138 goto xdr_error; \ 139 } \ 140 } while (0) 141 142 static void next_decode_page(struct nfsd4_compoundargs *argp) 143 { 144 argp->p = page_address(argp->pagelist[0]); 145 argp->pagelist++; 146 if (argp->pagelen < PAGE_SIZE) { 147 argp->end = argp->p + XDR_QUADLEN(argp->pagelen); 148 argp->pagelen = 0; 149 } else { 150 argp->end = argp->p + (PAGE_SIZE>>2); 151 argp->pagelen -= PAGE_SIZE; 152 } 153 } 154 155 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 156 { 157 /* We want more bytes than seem to be available. 158 * Maybe we need a new page, maybe we have just run out 159 */ 160 unsigned int avail = (char *)argp->end - (char *)argp->p; 161 __be32 *p; 162 163 if (argp->pagelen == 0) { 164 struct kvec *vec = &argp->rqstp->rq_arg.tail[0]; 165 166 if (!argp->tail) { 167 argp->tail = true; 168 avail = vec->iov_len; 169 argp->p = vec->iov_base; 170 argp->end = vec->iov_base + avail; 171 } 172 173 if (avail < nbytes) 174 return NULL; 175 176 p = argp->p; 177 argp->p += XDR_QUADLEN(nbytes); 178 return p; 179 } 180 181 if (avail + argp->pagelen < nbytes) 182 return NULL; 183 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 184 return NULL; 185 /* ok, we can do it with the current plus the next page */ 186 if (nbytes <= sizeof(argp->tmp)) 187 p = argp->tmp; 188 else { 189 kfree(argp->tmpp); 190 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 191 if (!p) 192 return NULL; 193 194 } 195 /* 196 * The following memcpy is safe because read_buf is always 197 * called with nbytes > avail, and the two cases above both 198 * guarantee p points to at least nbytes bytes. 199 */ 200 memcpy(p, argp->p, avail); 201 next_decode_page(argp); 202 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 203 argp->p += XDR_QUADLEN(nbytes - avail); 204 return p; 205 } 206 207 static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp) 208 { 209 unsigned int this = (char *)argp->end - (char *)argp->p; 210 211 return this + argp->pagelen; 212 } 213 214 static int zero_clientid(clientid_t *clid) 215 { 216 return (clid->cl_boot == 0) && (clid->cl_id == 0); 217 } 218 219 /** 220 * svcxdr_tmpalloc - allocate memory to be freed after compound processing 221 * @argp: NFSv4 compound argument structure 222 * @len: length of buffer to allocate 223 * 224 * Allocates a buffer of size @len to be freed when processing the compound 225 * operation described in @argp finishes. 226 */ 227 static void * 228 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) 229 { 230 struct svcxdr_tmpbuf *tb; 231 232 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); 233 if (!tb) 234 return NULL; 235 tb->next = argp->to_free; 236 argp->to_free = tb; 237 return tb->buf; 238 } 239 240 /* 241 * For xdr strings that need to be passed to other kernel api's 242 * as null-terminated strings. 243 * 244 * Note null-terminating in place usually isn't safe since the 245 * buffer might end on a page boundary. 246 */ 247 static char * 248 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) 249 { 250 char *p = svcxdr_tmpalloc(argp, len + 1); 251 252 if (!p) 253 return NULL; 254 memcpy(p, buf, len); 255 p[len] = '\0'; 256 return p; 257 } 258 259 /** 260 * savemem - duplicate a chunk of memory for later processing 261 * @argp: NFSv4 compound argument structure to be freed with 262 * @p: pointer to be duplicated 263 * @nbytes: length to be duplicated 264 * 265 * Returns a pointer to a copy of @nbytes bytes of memory at @p 266 * that are preserved until processing of the NFSv4 compound 267 * operation described by @argp finishes. 268 */ 269 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 270 { 271 void *ret; 272 273 ret = svcxdr_tmpalloc(argp, nbytes); 274 if (!ret) 275 return NULL; 276 memcpy(ret, p, nbytes); 277 return ret; 278 } 279 280 static __be32 281 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv) 282 { 283 DECODE_HEAD; 284 285 READ_BUF(12); 286 p = xdr_decode_hyper(p, &tv->tv_sec); 287 tv->tv_nsec = be32_to_cpup(p++); 288 if (tv->tv_nsec >= (u32)1000000000) 289 return nfserr_inval; 290 291 DECODE_TAIL; 292 } 293 294 static __be32 295 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 296 { 297 u32 bmlen; 298 DECODE_HEAD; 299 300 bmval[0] = 0; 301 bmval[1] = 0; 302 bmval[2] = 0; 303 304 READ_BUF(4); 305 bmlen = be32_to_cpup(p++); 306 if (bmlen > 1000) 307 goto xdr_error; 308 309 READ_BUF(bmlen << 2); 310 if (bmlen > 0) 311 bmval[0] = be32_to_cpup(p++); 312 if (bmlen > 1) 313 bmval[1] = be32_to_cpup(p++); 314 if (bmlen > 2) 315 bmval[2] = be32_to_cpup(p++); 316 317 DECODE_TAIL; 318 } 319 320 static __be32 321 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 322 struct iattr *iattr, struct nfs4_acl **acl, 323 struct xdr_netobj *label, int *umask) 324 { 325 int expected_len, len = 0; 326 u32 dummy32; 327 char *buf; 328 329 DECODE_HEAD; 330 iattr->ia_valid = 0; 331 if ((status = nfsd4_decode_bitmap(argp, bmval))) 332 return status; 333 334 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 335 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 336 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { 337 if (nfsd_attrs_supported(argp->minorversion, bmval)) 338 return nfserr_inval; 339 return nfserr_attrnotsupp; 340 } 341 342 READ_BUF(4); 343 expected_len = be32_to_cpup(p++); 344 345 if (bmval[0] & FATTR4_WORD0_SIZE) { 346 READ_BUF(8); 347 len += 8; 348 p = xdr_decode_hyper(p, &iattr->ia_size); 349 iattr->ia_valid |= ATTR_SIZE; 350 } 351 if (bmval[0] & FATTR4_WORD0_ACL) { 352 u32 nace; 353 struct nfs4_ace *ace; 354 355 READ_BUF(4); len += 4; 356 nace = be32_to_cpup(p++); 357 358 if (nace > compoundargs_bytes_left(argp)/20) 359 /* 360 * Even with 4-byte names there wouldn't be 361 * space for that many aces; something fishy is 362 * going on: 363 */ 364 return nfserr_fbig; 365 366 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); 367 if (*acl == NULL) 368 return nfserr_jukebox; 369 370 (*acl)->naces = nace; 371 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 372 READ_BUF(16); len += 16; 373 ace->type = be32_to_cpup(p++); 374 ace->flag = be32_to_cpup(p++); 375 ace->access_mask = be32_to_cpup(p++); 376 dummy32 = be32_to_cpup(p++); 377 READ_BUF(dummy32); 378 len += XDR_QUADLEN(dummy32) << 2; 379 READMEM(buf, dummy32); 380 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 381 status = nfs_ok; 382 if (ace->whotype != NFS4_ACL_WHO_NAMED) 383 ; 384 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 385 status = nfsd_map_name_to_gid(argp->rqstp, 386 buf, dummy32, &ace->who_gid); 387 else 388 status = nfsd_map_name_to_uid(argp->rqstp, 389 buf, dummy32, &ace->who_uid); 390 if (status) 391 return status; 392 } 393 } else 394 *acl = NULL; 395 if (bmval[1] & FATTR4_WORD1_MODE) { 396 READ_BUF(4); 397 len += 4; 398 iattr->ia_mode = be32_to_cpup(p++); 399 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 400 iattr->ia_valid |= ATTR_MODE; 401 } 402 if (bmval[1] & FATTR4_WORD1_OWNER) { 403 READ_BUF(4); 404 len += 4; 405 dummy32 = be32_to_cpup(p++); 406 READ_BUF(dummy32); 407 len += (XDR_QUADLEN(dummy32) << 2); 408 READMEM(buf, dummy32); 409 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 410 return status; 411 iattr->ia_valid |= ATTR_UID; 412 } 413 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 414 READ_BUF(4); 415 len += 4; 416 dummy32 = be32_to_cpup(p++); 417 READ_BUF(dummy32); 418 len += (XDR_QUADLEN(dummy32) << 2); 419 READMEM(buf, dummy32); 420 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 421 return status; 422 iattr->ia_valid |= ATTR_GID; 423 } 424 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 425 READ_BUF(4); 426 len += 4; 427 dummy32 = be32_to_cpup(p++); 428 switch (dummy32) { 429 case NFS4_SET_TO_CLIENT_TIME: 430 len += 12; 431 status = nfsd4_decode_time(argp, &iattr->ia_atime); 432 if (status) 433 return status; 434 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 435 break; 436 case NFS4_SET_TO_SERVER_TIME: 437 iattr->ia_valid |= ATTR_ATIME; 438 break; 439 default: 440 goto xdr_error; 441 } 442 } 443 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 444 READ_BUF(4); 445 len += 4; 446 dummy32 = be32_to_cpup(p++); 447 switch (dummy32) { 448 case NFS4_SET_TO_CLIENT_TIME: 449 len += 12; 450 status = nfsd4_decode_time(argp, &iattr->ia_mtime); 451 if (status) 452 return status; 453 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 454 break; 455 case NFS4_SET_TO_SERVER_TIME: 456 iattr->ia_valid |= ATTR_MTIME; 457 break; 458 default: 459 goto xdr_error; 460 } 461 } 462 463 label->len = 0; 464 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && 465 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { 466 READ_BUF(4); 467 len += 4; 468 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ 469 READ_BUF(4); 470 len += 4; 471 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ 472 READ_BUF(4); 473 len += 4; 474 dummy32 = be32_to_cpup(p++); 475 READ_BUF(dummy32); 476 if (dummy32 > NFS4_MAXLABELLEN) 477 return nfserr_badlabel; 478 len += (XDR_QUADLEN(dummy32) << 2); 479 READMEM(buf, dummy32); 480 label->len = dummy32; 481 label->data = svcxdr_dupstr(argp, buf, dummy32); 482 if (!label->data) 483 return nfserr_jukebox; 484 } 485 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { 486 if (!umask) 487 goto xdr_error; 488 READ_BUF(8); 489 len += 8; 490 dummy32 = be32_to_cpup(p++); 491 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO); 492 dummy32 = be32_to_cpup(p++); 493 *umask = dummy32 & S_IRWXUGO; 494 iattr->ia_valid |= ATTR_MODE; 495 } 496 if (len != expected_len) 497 goto xdr_error; 498 499 DECODE_TAIL; 500 } 501 502 static __be32 503 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 504 { 505 DECODE_HEAD; 506 507 READ_BUF(sizeof(stateid_t)); 508 sid->si_generation = be32_to_cpup(p++); 509 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 510 511 DECODE_TAIL; 512 } 513 514 static __be32 515 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 516 { 517 DECODE_HEAD; 518 519 READ_BUF(4); 520 access->ac_req_access = be32_to_cpup(p++); 521 522 DECODE_TAIL; 523 } 524 525 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 526 { 527 DECODE_HEAD; 528 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); 529 u32 dummy, uid, gid; 530 char *machine_name; 531 int i; 532 int nr_secflavs; 533 534 /* callback_sec_params4 */ 535 READ_BUF(4); 536 nr_secflavs = be32_to_cpup(p++); 537 if (nr_secflavs) 538 cbs->flavor = (u32)(-1); 539 else 540 /* Is this legal? Be generous, take it to mean AUTH_NONE: */ 541 cbs->flavor = 0; 542 for (i = 0; i < nr_secflavs; ++i) { 543 READ_BUF(4); 544 dummy = be32_to_cpup(p++); 545 switch (dummy) { 546 case RPC_AUTH_NULL: 547 /* Nothing to read */ 548 if (cbs->flavor == (u32)(-1)) 549 cbs->flavor = RPC_AUTH_NULL; 550 break; 551 case RPC_AUTH_UNIX: 552 READ_BUF(8); 553 /* stamp */ 554 dummy = be32_to_cpup(p++); 555 556 /* machine name */ 557 dummy = be32_to_cpup(p++); 558 READ_BUF(dummy); 559 SAVEMEM(machine_name, dummy); 560 561 /* uid, gid */ 562 READ_BUF(8); 563 uid = be32_to_cpup(p++); 564 gid = be32_to_cpup(p++); 565 566 /* more gids */ 567 READ_BUF(4); 568 dummy = be32_to_cpup(p++); 569 READ_BUF(dummy * 4); 570 if (cbs->flavor == (u32)(-1)) { 571 kuid_t kuid = make_kuid(userns, uid); 572 kgid_t kgid = make_kgid(userns, gid); 573 if (uid_valid(kuid) && gid_valid(kgid)) { 574 cbs->uid = kuid; 575 cbs->gid = kgid; 576 cbs->flavor = RPC_AUTH_UNIX; 577 } else { 578 dprintk("RPC_AUTH_UNIX with invalid" 579 "uid or gid ignoring!\n"); 580 } 581 } 582 break; 583 case RPC_AUTH_GSS: 584 dprintk("RPC_AUTH_GSS callback secflavor " 585 "not supported!\n"); 586 READ_BUF(8); 587 /* gcbp_service */ 588 dummy = be32_to_cpup(p++); 589 /* gcbp_handle_from_server */ 590 dummy = be32_to_cpup(p++); 591 READ_BUF(dummy); 592 p += XDR_QUADLEN(dummy); 593 /* gcbp_handle_from_client */ 594 READ_BUF(4); 595 dummy = be32_to_cpup(p++); 596 READ_BUF(dummy); 597 break; 598 default: 599 dprintk("Illegal callback secflavor\n"); 600 return nfserr_inval; 601 } 602 } 603 DECODE_TAIL; 604 } 605 606 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 607 { 608 DECODE_HEAD; 609 610 READ_BUF(4); 611 bc->bc_cb_program = be32_to_cpup(p++); 612 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 613 614 DECODE_TAIL; 615 } 616 617 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 618 { 619 DECODE_HEAD; 620 621 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 622 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 623 bcts->dir = be32_to_cpup(p++); 624 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 625 * could help us figure out we should be using it. */ 626 DECODE_TAIL; 627 } 628 629 static __be32 630 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 631 { 632 DECODE_HEAD; 633 634 READ_BUF(4); 635 close->cl_seqid = be32_to_cpup(p++); 636 return nfsd4_decode_stateid(argp, &close->cl_stateid); 637 638 DECODE_TAIL; 639 } 640 641 642 static __be32 643 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 644 { 645 DECODE_HEAD; 646 647 READ_BUF(12); 648 p = xdr_decode_hyper(p, &commit->co_offset); 649 commit->co_count = be32_to_cpup(p++); 650 651 DECODE_TAIL; 652 } 653 654 static __be32 655 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 656 { 657 DECODE_HEAD; 658 659 READ_BUF(4); 660 create->cr_type = be32_to_cpup(p++); 661 switch (create->cr_type) { 662 case NF4LNK: 663 READ_BUF(4); 664 create->cr_datalen = be32_to_cpup(p++); 665 READ_BUF(create->cr_datalen); 666 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); 667 if (!create->cr_data) 668 return nfserr_jukebox; 669 break; 670 case NF4BLK: 671 case NF4CHR: 672 READ_BUF(8); 673 create->cr_specdata1 = be32_to_cpup(p++); 674 create->cr_specdata2 = be32_to_cpup(p++); 675 break; 676 case NF4SOCK: 677 case NF4FIFO: 678 case NF4DIR: 679 default: 680 break; 681 } 682 683 READ_BUF(4); 684 create->cr_namelen = be32_to_cpup(p++); 685 READ_BUF(create->cr_namelen); 686 SAVEMEM(create->cr_name, create->cr_namelen); 687 if ((status = check_filename(create->cr_name, create->cr_namelen))) 688 return status; 689 690 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 691 &create->cr_acl, &create->cr_label, 692 &create->cr_umask); 693 if (status) 694 goto out; 695 696 DECODE_TAIL; 697 } 698 699 static inline __be32 700 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 701 { 702 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 703 } 704 705 static inline __be32 706 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 707 { 708 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 709 } 710 711 static __be32 712 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 713 { 714 DECODE_HEAD; 715 716 READ_BUF(4); 717 link->li_namelen = be32_to_cpup(p++); 718 READ_BUF(link->li_namelen); 719 SAVEMEM(link->li_name, link->li_namelen); 720 if ((status = check_filename(link->li_name, link->li_namelen))) 721 return status; 722 723 DECODE_TAIL; 724 } 725 726 static __be32 727 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 728 { 729 DECODE_HEAD; 730 731 /* 732 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 733 */ 734 READ_BUF(28); 735 lock->lk_type = be32_to_cpup(p++); 736 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 737 goto xdr_error; 738 lock->lk_reclaim = be32_to_cpup(p++); 739 p = xdr_decode_hyper(p, &lock->lk_offset); 740 p = xdr_decode_hyper(p, &lock->lk_length); 741 lock->lk_is_new = be32_to_cpup(p++); 742 743 if (lock->lk_is_new) { 744 READ_BUF(4); 745 lock->lk_new_open_seqid = be32_to_cpup(p++); 746 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 747 if (status) 748 return status; 749 READ_BUF(8 + sizeof(clientid_t)); 750 lock->lk_new_lock_seqid = be32_to_cpup(p++); 751 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 752 lock->lk_new_owner.len = be32_to_cpup(p++); 753 READ_BUF(lock->lk_new_owner.len); 754 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 755 } else { 756 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 757 if (status) 758 return status; 759 READ_BUF(4); 760 lock->lk_old_lock_seqid = be32_to_cpup(p++); 761 } 762 763 DECODE_TAIL; 764 } 765 766 static __be32 767 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 768 { 769 DECODE_HEAD; 770 771 READ_BUF(32); 772 lockt->lt_type = be32_to_cpup(p++); 773 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 774 goto xdr_error; 775 p = xdr_decode_hyper(p, &lockt->lt_offset); 776 p = xdr_decode_hyper(p, &lockt->lt_length); 777 COPYMEM(&lockt->lt_clientid, 8); 778 lockt->lt_owner.len = be32_to_cpup(p++); 779 READ_BUF(lockt->lt_owner.len); 780 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 781 782 DECODE_TAIL; 783 } 784 785 static __be32 786 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 787 { 788 DECODE_HEAD; 789 790 READ_BUF(8); 791 locku->lu_type = be32_to_cpup(p++); 792 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 793 goto xdr_error; 794 locku->lu_seqid = be32_to_cpup(p++); 795 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 796 if (status) 797 return status; 798 READ_BUF(16); 799 p = xdr_decode_hyper(p, &locku->lu_offset); 800 p = xdr_decode_hyper(p, &locku->lu_length); 801 802 DECODE_TAIL; 803 } 804 805 static __be32 806 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 807 { 808 DECODE_HEAD; 809 810 READ_BUF(4); 811 lookup->lo_len = be32_to_cpup(p++); 812 READ_BUF(lookup->lo_len); 813 SAVEMEM(lookup->lo_name, lookup->lo_len); 814 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 815 return status; 816 817 DECODE_TAIL; 818 } 819 820 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 821 { 822 __be32 *p; 823 u32 w; 824 825 READ_BUF(4); 826 w = be32_to_cpup(p++); 827 *share_access = w & NFS4_SHARE_ACCESS_MASK; 828 *deleg_want = w & NFS4_SHARE_WANT_MASK; 829 if (deleg_when) 830 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 831 832 switch (w & NFS4_SHARE_ACCESS_MASK) { 833 case NFS4_SHARE_ACCESS_READ: 834 case NFS4_SHARE_ACCESS_WRITE: 835 case NFS4_SHARE_ACCESS_BOTH: 836 break; 837 default: 838 return nfserr_bad_xdr; 839 } 840 w &= ~NFS4_SHARE_ACCESS_MASK; 841 if (!w) 842 return nfs_ok; 843 if (!argp->minorversion) 844 return nfserr_bad_xdr; 845 switch (w & NFS4_SHARE_WANT_MASK) { 846 case NFS4_SHARE_WANT_NO_PREFERENCE: 847 case NFS4_SHARE_WANT_READ_DELEG: 848 case NFS4_SHARE_WANT_WRITE_DELEG: 849 case NFS4_SHARE_WANT_ANY_DELEG: 850 case NFS4_SHARE_WANT_NO_DELEG: 851 case NFS4_SHARE_WANT_CANCEL: 852 break; 853 default: 854 return nfserr_bad_xdr; 855 } 856 w &= ~NFS4_SHARE_WANT_MASK; 857 if (!w) 858 return nfs_ok; 859 860 if (!deleg_when) /* open_downgrade */ 861 return nfserr_inval; 862 switch (w) { 863 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 864 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 865 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 866 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 867 return nfs_ok; 868 } 869 xdr_error: 870 return nfserr_bad_xdr; 871 } 872 873 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 874 { 875 __be32 *p; 876 877 READ_BUF(4); 878 *x = be32_to_cpup(p++); 879 /* Note: unlinke access bits, deny bits may be zero. */ 880 if (*x & ~NFS4_SHARE_DENY_BOTH) 881 return nfserr_bad_xdr; 882 return nfs_ok; 883 xdr_error: 884 return nfserr_bad_xdr; 885 } 886 887 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 888 { 889 __be32 *p; 890 891 READ_BUF(4); 892 o->len = be32_to_cpup(p++); 893 894 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 895 return nfserr_bad_xdr; 896 897 READ_BUF(o->len); 898 SAVEMEM(o->data, o->len); 899 return nfs_ok; 900 xdr_error: 901 return nfserr_bad_xdr; 902 } 903 904 static __be32 905 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 906 { 907 DECODE_HEAD; 908 u32 dummy; 909 910 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 911 open->op_iattr.ia_valid = 0; 912 open->op_openowner = NULL; 913 914 open->op_xdr_error = 0; 915 /* seqid, share_access, share_deny, clientid, ownerlen */ 916 READ_BUF(4); 917 open->op_seqid = be32_to_cpup(p++); 918 /* decode, yet ignore deleg_when until supported */ 919 status = nfsd4_decode_share_access(argp, &open->op_share_access, 920 &open->op_deleg_want, &dummy); 921 if (status) 922 goto xdr_error; 923 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 924 if (status) 925 goto xdr_error; 926 READ_BUF(sizeof(clientid_t)); 927 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 928 status = nfsd4_decode_opaque(argp, &open->op_owner); 929 if (status) 930 goto xdr_error; 931 READ_BUF(4); 932 open->op_create = be32_to_cpup(p++); 933 switch (open->op_create) { 934 case NFS4_OPEN_NOCREATE: 935 break; 936 case NFS4_OPEN_CREATE: 937 READ_BUF(4); 938 open->op_createmode = be32_to_cpup(p++); 939 switch (open->op_createmode) { 940 case NFS4_CREATE_UNCHECKED: 941 case NFS4_CREATE_GUARDED: 942 status = nfsd4_decode_fattr(argp, open->op_bmval, 943 &open->op_iattr, &open->op_acl, &open->op_label, 944 &open->op_umask); 945 if (status) 946 goto out; 947 break; 948 case NFS4_CREATE_EXCLUSIVE: 949 READ_BUF(NFS4_VERIFIER_SIZE); 950 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 951 break; 952 case NFS4_CREATE_EXCLUSIVE4_1: 953 if (argp->minorversion < 1) 954 goto xdr_error; 955 READ_BUF(NFS4_VERIFIER_SIZE); 956 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 957 status = nfsd4_decode_fattr(argp, open->op_bmval, 958 &open->op_iattr, &open->op_acl, &open->op_label, 959 &open->op_umask); 960 if (status) 961 goto out; 962 break; 963 default: 964 goto xdr_error; 965 } 966 break; 967 default: 968 goto xdr_error; 969 } 970 971 /* open_claim */ 972 READ_BUF(4); 973 open->op_claim_type = be32_to_cpup(p++); 974 switch (open->op_claim_type) { 975 case NFS4_OPEN_CLAIM_NULL: 976 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 977 READ_BUF(4); 978 open->op_fname.len = be32_to_cpup(p++); 979 READ_BUF(open->op_fname.len); 980 SAVEMEM(open->op_fname.data, open->op_fname.len); 981 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 982 return status; 983 break; 984 case NFS4_OPEN_CLAIM_PREVIOUS: 985 READ_BUF(4); 986 open->op_delegate_type = be32_to_cpup(p++); 987 break; 988 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 989 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 990 if (status) 991 return status; 992 READ_BUF(4); 993 open->op_fname.len = be32_to_cpup(p++); 994 READ_BUF(open->op_fname.len); 995 SAVEMEM(open->op_fname.data, open->op_fname.len); 996 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 997 return status; 998 break; 999 case NFS4_OPEN_CLAIM_FH: 1000 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1001 if (argp->minorversion < 1) 1002 goto xdr_error; 1003 /* void */ 1004 break; 1005 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1006 if (argp->minorversion < 1) 1007 goto xdr_error; 1008 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 1009 if (status) 1010 return status; 1011 break; 1012 default: 1013 goto xdr_error; 1014 } 1015 1016 DECODE_TAIL; 1017 } 1018 1019 static __be32 1020 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 1021 { 1022 DECODE_HEAD; 1023 1024 if (argp->minorversion >= 1) 1025 return nfserr_notsupp; 1026 1027 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 1028 if (status) 1029 return status; 1030 READ_BUF(4); 1031 open_conf->oc_seqid = be32_to_cpup(p++); 1032 1033 DECODE_TAIL; 1034 } 1035 1036 static __be32 1037 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 1038 { 1039 DECODE_HEAD; 1040 1041 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 1042 if (status) 1043 return status; 1044 READ_BUF(4); 1045 open_down->od_seqid = be32_to_cpup(p++); 1046 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 1047 &open_down->od_deleg_want, NULL); 1048 if (status) 1049 return status; 1050 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 1051 if (status) 1052 return status; 1053 DECODE_TAIL; 1054 } 1055 1056 static __be32 1057 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 1058 { 1059 DECODE_HEAD; 1060 1061 READ_BUF(4); 1062 putfh->pf_fhlen = be32_to_cpup(p++); 1063 if (putfh->pf_fhlen > NFS4_FHSIZE) 1064 goto xdr_error; 1065 READ_BUF(putfh->pf_fhlen); 1066 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 1067 1068 DECODE_TAIL; 1069 } 1070 1071 static __be32 1072 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) 1073 { 1074 if (argp->minorversion == 0) 1075 return nfs_ok; 1076 return nfserr_notsupp; 1077 } 1078 1079 static __be32 1080 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 1081 { 1082 DECODE_HEAD; 1083 1084 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 1085 if (status) 1086 return status; 1087 READ_BUF(12); 1088 p = xdr_decode_hyper(p, &read->rd_offset); 1089 read->rd_length = be32_to_cpup(p++); 1090 1091 DECODE_TAIL; 1092 } 1093 1094 static __be32 1095 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 1096 { 1097 DECODE_HEAD; 1098 1099 READ_BUF(24); 1100 p = xdr_decode_hyper(p, &readdir->rd_cookie); 1101 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 1102 readdir->rd_dircount = be32_to_cpup(p++); 1103 readdir->rd_maxcount = be32_to_cpup(p++); 1104 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 1105 goto out; 1106 1107 DECODE_TAIL; 1108 } 1109 1110 static __be32 1111 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 1112 { 1113 DECODE_HEAD; 1114 1115 READ_BUF(4); 1116 remove->rm_namelen = be32_to_cpup(p++); 1117 READ_BUF(remove->rm_namelen); 1118 SAVEMEM(remove->rm_name, remove->rm_namelen); 1119 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 1120 return status; 1121 1122 DECODE_TAIL; 1123 } 1124 1125 static __be32 1126 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 1127 { 1128 DECODE_HEAD; 1129 1130 READ_BUF(4); 1131 rename->rn_snamelen = be32_to_cpup(p++); 1132 READ_BUF(rename->rn_snamelen); 1133 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1134 READ_BUF(4); 1135 rename->rn_tnamelen = be32_to_cpup(p++); 1136 READ_BUF(rename->rn_tnamelen); 1137 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1138 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1139 return status; 1140 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1141 return status; 1142 1143 DECODE_TAIL; 1144 } 1145 1146 static __be32 1147 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1148 { 1149 DECODE_HEAD; 1150 1151 if (argp->minorversion >= 1) 1152 return nfserr_notsupp; 1153 1154 READ_BUF(sizeof(clientid_t)); 1155 COPYMEM(clientid, sizeof(clientid_t)); 1156 1157 DECODE_TAIL; 1158 } 1159 1160 static __be32 1161 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1162 struct nfsd4_secinfo *secinfo) 1163 { 1164 DECODE_HEAD; 1165 1166 READ_BUF(4); 1167 secinfo->si_namelen = be32_to_cpup(p++); 1168 READ_BUF(secinfo->si_namelen); 1169 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1170 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1171 if (status) 1172 return status; 1173 DECODE_TAIL; 1174 } 1175 1176 static __be32 1177 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1178 struct nfsd4_secinfo_no_name *sin) 1179 { 1180 DECODE_HEAD; 1181 1182 READ_BUF(4); 1183 sin->sin_style = be32_to_cpup(p++); 1184 DECODE_TAIL; 1185 } 1186 1187 static __be32 1188 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1189 { 1190 __be32 status; 1191 1192 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1193 if (status) 1194 return status; 1195 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1196 &setattr->sa_acl, &setattr->sa_label, NULL); 1197 } 1198 1199 static __be32 1200 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1201 { 1202 DECODE_HEAD; 1203 1204 if (argp->minorversion >= 1) 1205 return nfserr_notsupp; 1206 1207 READ_BUF(NFS4_VERIFIER_SIZE); 1208 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1209 1210 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1211 if (status) 1212 return nfserr_bad_xdr; 1213 READ_BUF(8); 1214 setclientid->se_callback_prog = be32_to_cpup(p++); 1215 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1216 READ_BUF(setclientid->se_callback_netid_len); 1217 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1218 READ_BUF(4); 1219 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1220 1221 READ_BUF(setclientid->se_callback_addr_len); 1222 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1223 READ_BUF(4); 1224 setclientid->se_callback_ident = be32_to_cpup(p++); 1225 1226 DECODE_TAIL; 1227 } 1228 1229 static __be32 1230 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1231 { 1232 DECODE_HEAD; 1233 1234 if (argp->minorversion >= 1) 1235 return nfserr_notsupp; 1236 1237 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1238 COPYMEM(&scd_c->sc_clientid, 8); 1239 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1240 1241 DECODE_TAIL; 1242 } 1243 1244 /* Also used for NVERIFY */ 1245 static __be32 1246 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1247 { 1248 DECODE_HEAD; 1249 1250 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1251 goto out; 1252 1253 /* For convenience's sake, we compare raw xdr'd attributes in 1254 * nfsd4_proc_verify */ 1255 1256 READ_BUF(4); 1257 verify->ve_attrlen = be32_to_cpup(p++); 1258 READ_BUF(verify->ve_attrlen); 1259 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1260 1261 DECODE_TAIL; 1262 } 1263 1264 static __be32 1265 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1266 { 1267 int avail; 1268 int len; 1269 DECODE_HEAD; 1270 1271 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1272 if (status) 1273 return status; 1274 READ_BUF(16); 1275 p = xdr_decode_hyper(p, &write->wr_offset); 1276 write->wr_stable_how = be32_to_cpup(p++); 1277 if (write->wr_stable_how > NFS_FILE_SYNC) 1278 goto xdr_error; 1279 write->wr_buflen = be32_to_cpup(p++); 1280 1281 /* Sorry .. no magic macros for this.. * 1282 * READ_BUF(write->wr_buflen); 1283 * SAVEMEM(write->wr_buf, write->wr_buflen); 1284 */ 1285 avail = (char*)argp->end - (char*)argp->p; 1286 if (avail + argp->pagelen < write->wr_buflen) { 1287 dprintk("NFSD: xdr error (%s:%d)\n", 1288 __FILE__, __LINE__); 1289 goto xdr_error; 1290 } 1291 write->wr_head.iov_base = p; 1292 write->wr_head.iov_len = avail; 1293 write->wr_pagelist = argp->pagelist; 1294 1295 len = XDR_QUADLEN(write->wr_buflen) << 2; 1296 if (len >= avail) { 1297 int pages; 1298 1299 len -= avail; 1300 1301 pages = len >> PAGE_SHIFT; 1302 argp->pagelist += pages; 1303 argp->pagelen -= pages * PAGE_SIZE; 1304 len -= pages * PAGE_SIZE; 1305 1306 next_decode_page(argp); 1307 } 1308 argp->p += XDR_QUADLEN(len); 1309 1310 DECODE_TAIL; 1311 } 1312 1313 static __be32 1314 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1315 { 1316 DECODE_HEAD; 1317 1318 if (argp->minorversion >= 1) 1319 return nfserr_notsupp; 1320 1321 READ_BUF(12); 1322 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1323 rlockowner->rl_owner.len = be32_to_cpup(p++); 1324 READ_BUF(rlockowner->rl_owner.len); 1325 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1326 1327 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1328 return nfserr_inval; 1329 DECODE_TAIL; 1330 } 1331 1332 static __be32 1333 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1334 struct nfsd4_exchange_id *exid) 1335 { 1336 int dummy, tmp; 1337 DECODE_HEAD; 1338 1339 READ_BUF(NFS4_VERIFIER_SIZE); 1340 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1341 1342 status = nfsd4_decode_opaque(argp, &exid->clname); 1343 if (status) 1344 return nfserr_bad_xdr; 1345 1346 READ_BUF(4); 1347 exid->flags = be32_to_cpup(p++); 1348 1349 /* Ignore state_protect4_a */ 1350 READ_BUF(4); 1351 exid->spa_how = be32_to_cpup(p++); 1352 switch (exid->spa_how) { 1353 case SP4_NONE: 1354 break; 1355 case SP4_MACH_CRED: 1356 /* spo_must_enforce */ 1357 status = nfsd4_decode_bitmap(argp, 1358 exid->spo_must_enforce); 1359 if (status) 1360 goto out; 1361 /* spo_must_allow */ 1362 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); 1363 if (status) 1364 goto out; 1365 break; 1366 case SP4_SSV: 1367 /* ssp_ops */ 1368 READ_BUF(4); 1369 dummy = be32_to_cpup(p++); 1370 READ_BUF(dummy * 4); 1371 p += dummy; 1372 1373 READ_BUF(4); 1374 dummy = be32_to_cpup(p++); 1375 READ_BUF(dummy * 4); 1376 p += dummy; 1377 1378 /* ssp_hash_algs<> */ 1379 READ_BUF(4); 1380 tmp = be32_to_cpup(p++); 1381 while (tmp--) { 1382 READ_BUF(4); 1383 dummy = be32_to_cpup(p++); 1384 READ_BUF(dummy); 1385 p += XDR_QUADLEN(dummy); 1386 } 1387 1388 /* ssp_encr_algs<> */ 1389 READ_BUF(4); 1390 tmp = be32_to_cpup(p++); 1391 while (tmp--) { 1392 READ_BUF(4); 1393 dummy = be32_to_cpup(p++); 1394 READ_BUF(dummy); 1395 p += XDR_QUADLEN(dummy); 1396 } 1397 1398 /* ignore ssp_window and ssp_num_gss_handles: */ 1399 READ_BUF(8); 1400 break; 1401 default: 1402 goto xdr_error; 1403 } 1404 1405 READ_BUF(4); /* nfs_impl_id4 array length */ 1406 dummy = be32_to_cpup(p++); 1407 1408 if (dummy > 1) 1409 goto xdr_error; 1410 1411 if (dummy == 1) { 1412 status = nfsd4_decode_opaque(argp, &exid->nii_domain); 1413 if (status) 1414 goto xdr_error; 1415 1416 /* nii_name */ 1417 status = nfsd4_decode_opaque(argp, &exid->nii_name); 1418 if (status) 1419 goto xdr_error; 1420 1421 /* nii_date */ 1422 status = nfsd4_decode_time(argp, &exid->nii_time); 1423 if (status) 1424 goto xdr_error; 1425 } 1426 DECODE_TAIL; 1427 } 1428 1429 static __be32 1430 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1431 struct nfsd4_create_session *sess) 1432 { 1433 DECODE_HEAD; 1434 1435 READ_BUF(16); 1436 COPYMEM(&sess->clientid, 8); 1437 sess->seqid = be32_to_cpup(p++); 1438 sess->flags = be32_to_cpup(p++); 1439 1440 /* Fore channel attrs */ 1441 READ_BUF(28); 1442 p++; /* headerpadsz is always 0 */ 1443 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1444 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1445 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1446 sess->fore_channel.maxops = be32_to_cpup(p++); 1447 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1448 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1449 if (sess->fore_channel.nr_rdma_attrs == 1) { 1450 READ_BUF(4); 1451 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1452 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1453 dprintk("Too many fore channel attr bitmaps!\n"); 1454 goto xdr_error; 1455 } 1456 1457 /* Back channel attrs */ 1458 READ_BUF(28); 1459 p++; /* headerpadsz is always 0 */ 1460 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1461 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1462 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1463 sess->back_channel.maxops = be32_to_cpup(p++); 1464 sess->back_channel.maxreqs = be32_to_cpup(p++); 1465 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1466 if (sess->back_channel.nr_rdma_attrs == 1) { 1467 READ_BUF(4); 1468 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1469 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1470 dprintk("Too many back channel attr bitmaps!\n"); 1471 goto xdr_error; 1472 } 1473 1474 READ_BUF(4); 1475 sess->callback_prog = be32_to_cpup(p++); 1476 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1477 DECODE_TAIL; 1478 } 1479 1480 static __be32 1481 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1482 struct nfsd4_destroy_session *destroy_session) 1483 { 1484 DECODE_HEAD; 1485 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1486 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1487 1488 DECODE_TAIL; 1489 } 1490 1491 static __be32 1492 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1493 struct nfsd4_free_stateid *free_stateid) 1494 { 1495 DECODE_HEAD; 1496 1497 READ_BUF(sizeof(stateid_t)); 1498 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1499 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1500 1501 DECODE_TAIL; 1502 } 1503 1504 static __be32 1505 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1506 struct nfsd4_sequence *seq) 1507 { 1508 DECODE_HEAD; 1509 1510 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1511 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1512 seq->seqid = be32_to_cpup(p++); 1513 seq->slotid = be32_to_cpup(p++); 1514 seq->maxslots = be32_to_cpup(p++); 1515 seq->cachethis = be32_to_cpup(p++); 1516 1517 DECODE_TAIL; 1518 } 1519 1520 static __be32 1521 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1522 { 1523 int i; 1524 __be32 *p, status; 1525 struct nfsd4_test_stateid_id *stateid; 1526 1527 READ_BUF(4); 1528 test_stateid->ts_num_ids = ntohl(*p++); 1529 1530 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1531 1532 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1533 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1534 if (!stateid) { 1535 status = nfserrno(-ENOMEM); 1536 goto out; 1537 } 1538 1539 INIT_LIST_HEAD(&stateid->ts_id_list); 1540 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1541 1542 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1543 if (status) 1544 goto out; 1545 } 1546 1547 status = 0; 1548 out: 1549 return status; 1550 xdr_error: 1551 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1552 status = nfserr_bad_xdr; 1553 goto out; 1554 } 1555 1556 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1557 { 1558 DECODE_HEAD; 1559 1560 READ_BUF(8); 1561 COPYMEM(&dc->clientid, 8); 1562 1563 DECODE_TAIL; 1564 } 1565 1566 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1567 { 1568 DECODE_HEAD; 1569 1570 READ_BUF(4); 1571 rc->rca_one_fs = be32_to_cpup(p++); 1572 1573 DECODE_TAIL; 1574 } 1575 1576 #ifdef CONFIG_NFSD_PNFS 1577 static __be32 1578 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1579 struct nfsd4_getdeviceinfo *gdev) 1580 { 1581 DECODE_HEAD; 1582 u32 num, i; 1583 1584 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1585 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1586 gdev->gd_layout_type = be32_to_cpup(p++); 1587 gdev->gd_maxcount = be32_to_cpup(p++); 1588 num = be32_to_cpup(p++); 1589 if (num) { 1590 if (num > 1000) 1591 goto xdr_error; 1592 READ_BUF(4 * num); 1593 gdev->gd_notify_types = be32_to_cpup(p++); 1594 for (i = 1; i < num; i++) { 1595 if (be32_to_cpup(p++)) { 1596 status = nfserr_inval; 1597 goto out; 1598 } 1599 } 1600 } 1601 DECODE_TAIL; 1602 } 1603 1604 static __be32 1605 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1606 struct nfsd4_layoutget *lgp) 1607 { 1608 DECODE_HEAD; 1609 1610 READ_BUF(36); 1611 lgp->lg_signal = be32_to_cpup(p++); 1612 lgp->lg_layout_type = be32_to_cpup(p++); 1613 lgp->lg_seg.iomode = be32_to_cpup(p++); 1614 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1615 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1616 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1617 1618 status = nfsd4_decode_stateid(argp, &lgp->lg_sid); 1619 if (status) 1620 return status; 1621 1622 READ_BUF(4); 1623 lgp->lg_maxcount = be32_to_cpup(p++); 1624 1625 DECODE_TAIL; 1626 } 1627 1628 static __be32 1629 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1630 struct nfsd4_layoutcommit *lcp) 1631 { 1632 DECODE_HEAD; 1633 u32 timechange; 1634 1635 READ_BUF(20); 1636 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1637 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1638 lcp->lc_reclaim = be32_to_cpup(p++); 1639 1640 status = nfsd4_decode_stateid(argp, &lcp->lc_sid); 1641 if (status) 1642 return status; 1643 1644 READ_BUF(4); 1645 lcp->lc_newoffset = be32_to_cpup(p++); 1646 if (lcp->lc_newoffset) { 1647 READ_BUF(8); 1648 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1649 } else 1650 lcp->lc_last_wr = 0; 1651 READ_BUF(4); 1652 timechange = be32_to_cpup(p++); 1653 if (timechange) { 1654 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1655 if (status) 1656 return status; 1657 } else { 1658 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1659 } 1660 READ_BUF(8); 1661 lcp->lc_layout_type = be32_to_cpup(p++); 1662 1663 /* 1664 * Save the layout update in XDR format and let the layout driver deal 1665 * with it later. 1666 */ 1667 lcp->lc_up_len = be32_to_cpup(p++); 1668 if (lcp->lc_up_len > 0) { 1669 READ_BUF(lcp->lc_up_len); 1670 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1671 } 1672 1673 DECODE_TAIL; 1674 } 1675 1676 static __be32 1677 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1678 struct nfsd4_layoutreturn *lrp) 1679 { 1680 DECODE_HEAD; 1681 1682 READ_BUF(16); 1683 lrp->lr_reclaim = be32_to_cpup(p++); 1684 lrp->lr_layout_type = be32_to_cpup(p++); 1685 lrp->lr_seg.iomode = be32_to_cpup(p++); 1686 lrp->lr_return_type = be32_to_cpup(p++); 1687 if (lrp->lr_return_type == RETURN_FILE) { 1688 READ_BUF(16); 1689 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1690 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1691 1692 status = nfsd4_decode_stateid(argp, &lrp->lr_sid); 1693 if (status) 1694 return status; 1695 1696 READ_BUF(4); 1697 lrp->lrf_body_len = be32_to_cpup(p++); 1698 if (lrp->lrf_body_len > 0) { 1699 READ_BUF(lrp->lrf_body_len); 1700 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1701 } 1702 } else { 1703 lrp->lr_seg.offset = 0; 1704 lrp->lr_seg.length = NFS4_MAX_UINT64; 1705 } 1706 1707 DECODE_TAIL; 1708 } 1709 #endif /* CONFIG_NFSD_PNFS */ 1710 1711 static __be32 1712 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1713 struct nfsd4_fallocate *fallocate) 1714 { 1715 DECODE_HEAD; 1716 1717 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1718 if (status) 1719 return status; 1720 1721 READ_BUF(16); 1722 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1723 xdr_decode_hyper(p, &fallocate->falloc_length); 1724 1725 DECODE_TAIL; 1726 } 1727 1728 static __be32 1729 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) 1730 { 1731 DECODE_HEAD; 1732 1733 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); 1734 if (status) 1735 return status; 1736 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); 1737 if (status) 1738 return status; 1739 1740 READ_BUF(8 + 8 + 8); 1741 p = xdr_decode_hyper(p, &clone->cl_src_pos); 1742 p = xdr_decode_hyper(p, &clone->cl_dst_pos); 1743 p = xdr_decode_hyper(p, &clone->cl_count); 1744 DECODE_TAIL; 1745 } 1746 1747 static __be32 1748 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) 1749 { 1750 DECODE_HEAD; 1751 1752 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); 1753 if (status) 1754 return status; 1755 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); 1756 if (status) 1757 return status; 1758 1759 READ_BUF(8 + 8 + 8 + 4 + 4 + 4); 1760 p = xdr_decode_hyper(p, ©->cp_src_pos); 1761 p = xdr_decode_hyper(p, ©->cp_dst_pos); 1762 p = xdr_decode_hyper(p, ©->cp_count); 1763 p++; /* ca_consecutive: we always do consecutive copies */ 1764 copy->cp_synchronous = be32_to_cpup(p++); 1765 /* tmp = be32_to_cpup(p); Source server list not supported */ 1766 1767 DECODE_TAIL; 1768 } 1769 1770 static __be32 1771 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, 1772 struct nfsd4_offload_status *os) 1773 { 1774 return nfsd4_decode_stateid(argp, &os->stateid); 1775 } 1776 1777 static __be32 1778 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1779 { 1780 DECODE_HEAD; 1781 1782 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1783 if (status) 1784 return status; 1785 1786 READ_BUF(8 + 4); 1787 p = xdr_decode_hyper(p, &seek->seek_offset); 1788 seek->seek_whence = be32_to_cpup(p); 1789 1790 DECODE_TAIL; 1791 } 1792 1793 static __be32 1794 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1795 { 1796 return nfs_ok; 1797 } 1798 1799 static __be32 1800 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1801 { 1802 return nfserr_notsupp; 1803 } 1804 1805 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1806 1807 static const nfsd4_dec nfsd4_dec_ops[] = { 1808 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1809 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1810 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1811 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1812 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1813 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1814 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1815 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1816 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1817 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1818 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1819 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1820 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1821 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1822 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1823 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1824 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1825 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1826 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1827 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1828 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1829 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1830 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1831 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1832 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1833 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1834 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1835 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1836 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1837 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1838 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1839 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1840 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1841 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1842 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1843 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1844 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1845 1846 /* new operations for NFSv4.1 */ 1847 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1848 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1849 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1850 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1851 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1852 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1853 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1854 #ifdef CONFIG_NFSD_PNFS 1855 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1856 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1857 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1858 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1859 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1860 #else 1861 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1862 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1863 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1864 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1865 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1866 #endif 1867 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1868 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1869 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1870 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1871 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1872 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1873 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1874 1875 /* new operations for NFSv4.2 */ 1876 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1877 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, 1878 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1879 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1880 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1881 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1882 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1883 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status, 1884 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status, 1885 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1886 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1887 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1888 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, 1889 }; 1890 1891 static inline bool 1892 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1893 { 1894 if (op->opnum < FIRST_NFS4_OP) 1895 return false; 1896 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1897 return false; 1898 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1899 return false; 1900 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1901 return false; 1902 return true; 1903 } 1904 1905 static __be32 1906 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1907 { 1908 DECODE_HEAD; 1909 struct nfsd4_op *op; 1910 bool cachethis = false; 1911 int auth_slack= argp->rqstp->rq_auth_slack; 1912 int max_reply = auth_slack + 8; /* opcnt, status */ 1913 int readcount = 0; 1914 int readbytes = 0; 1915 int i; 1916 1917 READ_BUF(4); 1918 argp->taglen = be32_to_cpup(p++); 1919 READ_BUF(argp->taglen); 1920 SAVEMEM(argp->tag, argp->taglen); 1921 READ_BUF(8); 1922 argp->minorversion = be32_to_cpup(p++); 1923 argp->opcnt = be32_to_cpup(p++); 1924 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1925 1926 if (argp->taglen > NFSD4_MAX_TAGLEN) 1927 goto xdr_error; 1928 /* 1929 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS 1930 * here, so we return success at the xdr level so that 1931 * nfsd4_proc can handle this is an NFS-level error. 1932 */ 1933 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 1934 return 0; 1935 1936 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1937 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1938 if (!argp->ops) { 1939 argp->ops = argp->iops; 1940 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1941 goto xdr_error; 1942 } 1943 } 1944 1945 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1946 argp->opcnt = 0; 1947 1948 for (i = 0; i < argp->opcnt; i++) { 1949 op = &argp->ops[i]; 1950 op->replay = NULL; 1951 1952 READ_BUF(4); 1953 op->opnum = be32_to_cpup(p++); 1954 1955 if (nfsd4_opnum_in_range(argp, op)) 1956 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1957 else { 1958 op->opnum = OP_ILLEGAL; 1959 op->status = nfserr_op_illegal; 1960 } 1961 op->opdesc = OPDESC(op); 1962 /* 1963 * We'll try to cache the result in the DRC if any one 1964 * op in the compound wants to be cached: 1965 */ 1966 cachethis |= nfsd4_cache_this_op(op); 1967 1968 if (op->opnum == OP_READ) { 1969 readcount++; 1970 readbytes += nfsd4_max_reply(argp->rqstp, op); 1971 } else 1972 max_reply += nfsd4_max_reply(argp->rqstp, op); 1973 /* 1974 * OP_LOCK and OP_LOCKT may return a conflicting lock. 1975 * (Special case because it will just skip encoding this 1976 * if it runs out of xdr buffer space, and it is the only 1977 * operation that behaves this way.) 1978 */ 1979 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) 1980 max_reply += NFS4_OPAQUE_LIMIT; 1981 1982 if (op->status) { 1983 argp->opcnt = i+1; 1984 break; 1985 } 1986 } 1987 /* Sessions make the DRC unnecessary: */ 1988 if (argp->minorversion) 1989 cachethis = false; 1990 svc_reserve(argp->rqstp, max_reply + readbytes); 1991 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1992 1993 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1994 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1995 1996 DECODE_TAIL; 1997 } 1998 1999 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, 2000 struct svc_export *exp) 2001 { 2002 if (exp->ex_flags & NFSEXP_V4ROOT) { 2003 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); 2004 *p++ = 0; 2005 } else if (IS_I_VERSION(inode)) { 2006 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); 2007 } else { 2008 *p++ = cpu_to_be32(stat->ctime.tv_sec); 2009 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 2010 } 2011 return p; 2012 } 2013 2014 /* 2015 * ctime (in NFSv4, time_metadata) is not writeable, and the client 2016 * doesn't really care what resolution could theoretically be stored by 2017 * the filesystem. 2018 * 2019 * The client cares how close together changes can be while still 2020 * guaranteeing ctime changes. For most filesystems (which have 2021 * timestamps with nanosecond fields) that is limited by the resolution 2022 * of the time returned from current_time() (which I'm assuming to be 2023 * 1/HZ). 2024 */ 2025 static __be32 *encode_time_delta(__be32 *p, struct inode *inode) 2026 { 2027 struct timespec ts; 2028 u32 ns; 2029 2030 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); 2031 ts = ns_to_timespec(ns); 2032 2033 p = xdr_encode_hyper(p, ts.tv_sec); 2034 *p++ = cpu_to_be32(ts.tv_nsec); 2035 2036 return p; 2037 } 2038 2039 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 2040 { 2041 *p++ = cpu_to_be32(c->atomic); 2042 if (c->change_supported) { 2043 p = xdr_encode_hyper(p, c->before_change); 2044 p = xdr_encode_hyper(p, c->after_change); 2045 } else { 2046 *p++ = cpu_to_be32(c->before_ctime_sec); 2047 *p++ = cpu_to_be32(c->before_ctime_nsec); 2048 *p++ = cpu_to_be32(c->after_ctime_sec); 2049 *p++ = cpu_to_be32(c->after_ctime_nsec); 2050 } 2051 return p; 2052 } 2053 2054 /* Encode as an array of strings the string given with components 2055 * separated @sep, escaped with esc_enter and esc_exit. 2056 */ 2057 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 2058 char *components, char esc_enter, 2059 char esc_exit) 2060 { 2061 __be32 *p; 2062 __be32 pathlen; 2063 int pathlen_offset; 2064 int strlen, count=0; 2065 char *str, *end, *next; 2066 2067 dprintk("nfsd4_encode_components(%s)\n", components); 2068 2069 pathlen_offset = xdr->buf->len; 2070 p = xdr_reserve_space(xdr, 4); 2071 if (!p) 2072 return nfserr_resource; 2073 p++; /* We will fill this in with @count later */ 2074 2075 end = str = components; 2076 while (*end) { 2077 bool found_esc = false; 2078 2079 /* try to parse as esc_start, ..., esc_end, sep */ 2080 if (*str == esc_enter) { 2081 for (; *end && (*end != esc_exit); end++) 2082 /* find esc_exit or end of string */; 2083 next = end + 1; 2084 if (*end && (!*next || *next == sep)) { 2085 str++; 2086 found_esc = true; 2087 } 2088 } 2089 2090 if (!found_esc) 2091 for (; *end && (*end != sep); end++) 2092 /* find sep or end of string */; 2093 2094 strlen = end - str; 2095 if (strlen) { 2096 p = xdr_reserve_space(xdr, strlen + 4); 2097 if (!p) 2098 return nfserr_resource; 2099 p = xdr_encode_opaque(p, str, strlen); 2100 count++; 2101 } 2102 else 2103 end++; 2104 if (found_esc) 2105 end = next; 2106 2107 str = end; 2108 } 2109 pathlen = htonl(count); 2110 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 2111 return 0; 2112 } 2113 2114 /* Encode as an array of strings the string given with components 2115 * separated @sep. 2116 */ 2117 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2118 char *components) 2119 { 2120 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2121 } 2122 2123 /* 2124 * encode a location element of a fs_locations structure 2125 */ 2126 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2127 struct nfsd4_fs_location *location) 2128 { 2129 __be32 status; 2130 2131 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2132 '[', ']'); 2133 if (status) 2134 return status; 2135 status = nfsd4_encode_components(xdr, '/', location->path); 2136 if (status) 2137 return status; 2138 return 0; 2139 } 2140 2141 /* 2142 * Encode a path in RFC3530 'pathname4' format 2143 */ 2144 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2145 const struct path *root, 2146 const struct path *path) 2147 { 2148 struct path cur = *path; 2149 __be32 *p; 2150 struct dentry **components = NULL; 2151 unsigned int ncomponents = 0; 2152 __be32 err = nfserr_jukebox; 2153 2154 dprintk("nfsd4_encode_components("); 2155 2156 path_get(&cur); 2157 /* First walk the path up to the nfsd root, and store the 2158 * dentries/path components in an array. 2159 */ 2160 for (;;) { 2161 if (path_equal(&cur, root)) 2162 break; 2163 if (cur.dentry == cur.mnt->mnt_root) { 2164 if (follow_up(&cur)) 2165 continue; 2166 goto out_free; 2167 } 2168 if ((ncomponents & 15) == 0) { 2169 struct dentry **new; 2170 new = krealloc(components, 2171 sizeof(*new) * (ncomponents + 16), 2172 GFP_KERNEL); 2173 if (!new) 2174 goto out_free; 2175 components = new; 2176 } 2177 components[ncomponents++] = cur.dentry; 2178 cur.dentry = dget_parent(cur.dentry); 2179 } 2180 err = nfserr_resource; 2181 p = xdr_reserve_space(xdr, 4); 2182 if (!p) 2183 goto out_free; 2184 *p++ = cpu_to_be32(ncomponents); 2185 2186 while (ncomponents) { 2187 struct dentry *dentry = components[ncomponents - 1]; 2188 unsigned int len; 2189 2190 spin_lock(&dentry->d_lock); 2191 len = dentry->d_name.len; 2192 p = xdr_reserve_space(xdr, len + 4); 2193 if (!p) { 2194 spin_unlock(&dentry->d_lock); 2195 goto out_free; 2196 } 2197 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2198 dprintk("/%pd", dentry); 2199 spin_unlock(&dentry->d_lock); 2200 dput(dentry); 2201 ncomponents--; 2202 } 2203 2204 err = 0; 2205 out_free: 2206 dprintk(")\n"); 2207 while (ncomponents) 2208 dput(components[--ncomponents]); 2209 kfree(components); 2210 path_put(&cur); 2211 return err; 2212 } 2213 2214 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2215 struct svc_rqst *rqstp, const struct path *path) 2216 { 2217 struct svc_export *exp_ps; 2218 __be32 res; 2219 2220 exp_ps = rqst_find_fsidzero_export(rqstp); 2221 if (IS_ERR(exp_ps)) 2222 return nfserrno(PTR_ERR(exp_ps)); 2223 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2224 exp_put(exp_ps); 2225 return res; 2226 } 2227 2228 /* 2229 * encode a fs_locations structure 2230 */ 2231 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2232 struct svc_rqst *rqstp, struct svc_export *exp) 2233 { 2234 __be32 status; 2235 int i; 2236 __be32 *p; 2237 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2238 2239 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2240 if (status) 2241 return status; 2242 p = xdr_reserve_space(xdr, 4); 2243 if (!p) 2244 return nfserr_resource; 2245 *p++ = cpu_to_be32(fslocs->locations_count); 2246 for (i=0; i<fslocs->locations_count; i++) { 2247 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2248 if (status) 2249 return status; 2250 } 2251 return 0; 2252 } 2253 2254 static u32 nfs4_file_type(umode_t mode) 2255 { 2256 switch (mode & S_IFMT) { 2257 case S_IFIFO: return NF4FIFO; 2258 case S_IFCHR: return NF4CHR; 2259 case S_IFDIR: return NF4DIR; 2260 case S_IFBLK: return NF4BLK; 2261 case S_IFLNK: return NF4LNK; 2262 case S_IFREG: return NF4REG; 2263 case S_IFSOCK: return NF4SOCK; 2264 default: return NF4BAD; 2265 }; 2266 } 2267 2268 static inline __be32 2269 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2270 struct nfs4_ace *ace) 2271 { 2272 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2273 return nfs4_acl_write_who(xdr, ace->whotype); 2274 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2275 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2276 else 2277 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2278 } 2279 2280 static inline __be32 2281 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) 2282 { 2283 __be32 *p; 2284 unsigned long i = hweight_long(layout_types); 2285 2286 p = xdr_reserve_space(xdr, 4 + 4 * i); 2287 if (!p) 2288 return nfserr_resource; 2289 2290 *p++ = cpu_to_be32(i); 2291 2292 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) 2293 if (layout_types & (1 << i)) 2294 *p++ = cpu_to_be32(i); 2295 2296 return 0; 2297 } 2298 2299 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2300 FATTR4_WORD0_RDATTR_ERROR) 2301 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2302 #define WORD2_ABSENT_FS_ATTRS 0 2303 2304 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2305 static inline __be32 2306 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2307 void *context, int len) 2308 { 2309 __be32 *p; 2310 2311 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2312 if (!p) 2313 return nfserr_resource; 2314 2315 /* 2316 * For now we use a 0 here to indicate the null translation; in 2317 * the future we may place a call to translation code here. 2318 */ 2319 *p++ = cpu_to_be32(0); /* lfs */ 2320 *p++ = cpu_to_be32(0); /* pi */ 2321 p = xdr_encode_opaque(p, context, len); 2322 return 0; 2323 } 2324 #else 2325 static inline __be32 2326 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2327 void *context, int len) 2328 { return 0; } 2329 #endif 2330 2331 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2332 { 2333 /* As per referral draft: */ 2334 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2335 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2336 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2337 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2338 *rdattr_err = NFSERR_MOVED; 2339 else 2340 return nfserr_moved; 2341 } 2342 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2343 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2344 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2345 return 0; 2346 } 2347 2348 2349 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2350 { 2351 struct path path = exp->ex_path; 2352 int err; 2353 2354 path_get(&path); 2355 while (follow_up(&path)) { 2356 if (path.dentry != path.mnt->mnt_root) 2357 break; 2358 } 2359 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); 2360 path_put(&path); 2361 return err; 2362 } 2363 2364 static __be32 2365 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2366 { 2367 __be32 *p; 2368 2369 if (bmval2) { 2370 p = xdr_reserve_space(xdr, 16); 2371 if (!p) 2372 goto out_resource; 2373 *p++ = cpu_to_be32(3); 2374 *p++ = cpu_to_be32(bmval0); 2375 *p++ = cpu_to_be32(bmval1); 2376 *p++ = cpu_to_be32(bmval2); 2377 } else if (bmval1) { 2378 p = xdr_reserve_space(xdr, 12); 2379 if (!p) 2380 goto out_resource; 2381 *p++ = cpu_to_be32(2); 2382 *p++ = cpu_to_be32(bmval0); 2383 *p++ = cpu_to_be32(bmval1); 2384 } else { 2385 p = xdr_reserve_space(xdr, 8); 2386 if (!p) 2387 goto out_resource; 2388 *p++ = cpu_to_be32(1); 2389 *p++ = cpu_to_be32(bmval0); 2390 } 2391 2392 return 0; 2393 out_resource: 2394 return nfserr_resource; 2395 } 2396 2397 /* 2398 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2399 * ourselves. 2400 */ 2401 static __be32 2402 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2403 struct svc_export *exp, 2404 struct dentry *dentry, u32 *bmval, 2405 struct svc_rqst *rqstp, int ignore_crossmnt) 2406 { 2407 u32 bmval0 = bmval[0]; 2408 u32 bmval1 = bmval[1]; 2409 u32 bmval2 = bmval[2]; 2410 struct kstat stat; 2411 struct svc_fh *tempfh = NULL; 2412 struct kstatfs statfs; 2413 __be32 *p; 2414 int starting_len = xdr->buf->len; 2415 int attrlen_offset; 2416 __be32 attrlen; 2417 u32 dummy; 2418 u64 dummy64; 2419 u32 rdattr_err = 0; 2420 __be32 status; 2421 int err; 2422 struct nfs4_acl *acl = NULL; 2423 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2424 void *context = NULL; 2425 int contextlen; 2426 #endif 2427 bool contextsupport = false; 2428 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2429 u32 minorversion = resp->cstate.minorversion; 2430 struct path path = { 2431 .mnt = exp->ex_path.mnt, 2432 .dentry = dentry, 2433 }; 2434 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2435 2436 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2437 BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); 2438 2439 if (exp->ex_fslocs.migrated) { 2440 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2441 if (status) 2442 goto out; 2443 } 2444 2445 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); 2446 if (err) 2447 goto out_nfserr; 2448 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2449 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2450 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2451 FATTR4_WORD1_SPACE_TOTAL))) { 2452 err = vfs_statfs(&path, &statfs); 2453 if (err) 2454 goto out_nfserr; 2455 } 2456 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2457 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2458 status = nfserr_jukebox; 2459 if (!tempfh) 2460 goto out; 2461 fh_init(tempfh, NFS4_FHSIZE); 2462 status = fh_compose(tempfh, exp, dentry, NULL); 2463 if (status) 2464 goto out; 2465 fhp = tempfh; 2466 } 2467 if (bmval0 & FATTR4_WORD0_ACL) { 2468 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2469 if (err == -EOPNOTSUPP) 2470 bmval0 &= ~FATTR4_WORD0_ACL; 2471 else if (err == -EINVAL) { 2472 status = nfserr_attrnotsupp; 2473 goto out; 2474 } else if (err != 0) 2475 goto out_nfserr; 2476 } 2477 2478 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2479 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2480 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2481 if (exp->ex_flags & NFSEXP_SECURITY_LABEL) 2482 err = security_inode_getsecctx(d_inode(dentry), 2483 &context, &contextlen); 2484 else 2485 err = -EOPNOTSUPP; 2486 contextsupport = (err == 0); 2487 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2488 if (err == -EOPNOTSUPP) 2489 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2490 else if (err) 2491 goto out_nfserr; 2492 } 2493 } 2494 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2495 2496 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2497 if (status) 2498 goto out; 2499 2500 attrlen_offset = xdr->buf->len; 2501 p = xdr_reserve_space(xdr, 4); 2502 if (!p) 2503 goto out_resource; 2504 p++; /* to be backfilled later */ 2505 2506 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2507 u32 supp[3]; 2508 2509 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); 2510 2511 if (!IS_POSIXACL(dentry->d_inode)) 2512 supp[0] &= ~FATTR4_WORD0_ACL; 2513 if (!contextsupport) 2514 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2515 if (!supp[2]) { 2516 p = xdr_reserve_space(xdr, 12); 2517 if (!p) 2518 goto out_resource; 2519 *p++ = cpu_to_be32(2); 2520 *p++ = cpu_to_be32(supp[0]); 2521 *p++ = cpu_to_be32(supp[1]); 2522 } else { 2523 p = xdr_reserve_space(xdr, 16); 2524 if (!p) 2525 goto out_resource; 2526 *p++ = cpu_to_be32(3); 2527 *p++ = cpu_to_be32(supp[0]); 2528 *p++ = cpu_to_be32(supp[1]); 2529 *p++ = cpu_to_be32(supp[2]); 2530 } 2531 } 2532 if (bmval0 & FATTR4_WORD0_TYPE) { 2533 p = xdr_reserve_space(xdr, 4); 2534 if (!p) 2535 goto out_resource; 2536 dummy = nfs4_file_type(stat.mode); 2537 if (dummy == NF4BAD) { 2538 status = nfserr_serverfault; 2539 goto out; 2540 } 2541 *p++ = cpu_to_be32(dummy); 2542 } 2543 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2544 p = xdr_reserve_space(xdr, 4); 2545 if (!p) 2546 goto out_resource; 2547 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2548 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2549 else 2550 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2551 NFS4_FH_VOL_RENAME); 2552 } 2553 if (bmval0 & FATTR4_WORD0_CHANGE) { 2554 p = xdr_reserve_space(xdr, 8); 2555 if (!p) 2556 goto out_resource; 2557 p = encode_change(p, &stat, d_inode(dentry), exp); 2558 } 2559 if (bmval0 & FATTR4_WORD0_SIZE) { 2560 p = xdr_reserve_space(xdr, 8); 2561 if (!p) 2562 goto out_resource; 2563 p = xdr_encode_hyper(p, stat.size); 2564 } 2565 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2566 p = xdr_reserve_space(xdr, 4); 2567 if (!p) 2568 goto out_resource; 2569 *p++ = cpu_to_be32(1); 2570 } 2571 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2572 p = xdr_reserve_space(xdr, 4); 2573 if (!p) 2574 goto out_resource; 2575 *p++ = cpu_to_be32(1); 2576 } 2577 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2578 p = xdr_reserve_space(xdr, 4); 2579 if (!p) 2580 goto out_resource; 2581 *p++ = cpu_to_be32(0); 2582 } 2583 if (bmval0 & FATTR4_WORD0_FSID) { 2584 p = xdr_reserve_space(xdr, 16); 2585 if (!p) 2586 goto out_resource; 2587 if (exp->ex_fslocs.migrated) { 2588 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2589 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2590 } else switch(fsid_source(fhp)) { 2591 case FSIDSOURCE_FSID: 2592 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2593 p = xdr_encode_hyper(p, (u64)0); 2594 break; 2595 case FSIDSOURCE_DEV: 2596 *p++ = cpu_to_be32(0); 2597 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2598 *p++ = cpu_to_be32(0); 2599 *p++ = cpu_to_be32(MINOR(stat.dev)); 2600 break; 2601 case FSIDSOURCE_UUID: 2602 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2603 EX_UUID_LEN); 2604 break; 2605 } 2606 } 2607 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2608 p = xdr_reserve_space(xdr, 4); 2609 if (!p) 2610 goto out_resource; 2611 *p++ = cpu_to_be32(0); 2612 } 2613 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2614 p = xdr_reserve_space(xdr, 4); 2615 if (!p) 2616 goto out_resource; 2617 *p++ = cpu_to_be32(nn->nfsd4_lease); 2618 } 2619 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2620 p = xdr_reserve_space(xdr, 4); 2621 if (!p) 2622 goto out_resource; 2623 *p++ = cpu_to_be32(rdattr_err); 2624 } 2625 if (bmval0 & FATTR4_WORD0_ACL) { 2626 struct nfs4_ace *ace; 2627 2628 if (acl == NULL) { 2629 p = xdr_reserve_space(xdr, 4); 2630 if (!p) 2631 goto out_resource; 2632 2633 *p++ = cpu_to_be32(0); 2634 goto out_acl; 2635 } 2636 p = xdr_reserve_space(xdr, 4); 2637 if (!p) 2638 goto out_resource; 2639 *p++ = cpu_to_be32(acl->naces); 2640 2641 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2642 p = xdr_reserve_space(xdr, 4*3); 2643 if (!p) 2644 goto out_resource; 2645 *p++ = cpu_to_be32(ace->type); 2646 *p++ = cpu_to_be32(ace->flag); 2647 *p++ = cpu_to_be32(ace->access_mask & 2648 NFS4_ACE_MASK_ALL); 2649 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2650 if (status) 2651 goto out; 2652 } 2653 } 2654 out_acl: 2655 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2656 p = xdr_reserve_space(xdr, 4); 2657 if (!p) 2658 goto out_resource; 2659 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2660 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2661 } 2662 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2663 p = xdr_reserve_space(xdr, 4); 2664 if (!p) 2665 goto out_resource; 2666 *p++ = cpu_to_be32(1); 2667 } 2668 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2669 p = xdr_reserve_space(xdr, 4); 2670 if (!p) 2671 goto out_resource; 2672 *p++ = cpu_to_be32(0); 2673 } 2674 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2675 p = xdr_reserve_space(xdr, 4); 2676 if (!p) 2677 goto out_resource; 2678 *p++ = cpu_to_be32(1); 2679 } 2680 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2681 p = xdr_reserve_space(xdr, 4); 2682 if (!p) 2683 goto out_resource; 2684 *p++ = cpu_to_be32(1); 2685 } 2686 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2687 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2688 if (!p) 2689 goto out_resource; 2690 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2691 fhp->fh_handle.fh_size); 2692 } 2693 if (bmval0 & FATTR4_WORD0_FILEID) { 2694 p = xdr_reserve_space(xdr, 8); 2695 if (!p) 2696 goto out_resource; 2697 p = xdr_encode_hyper(p, stat.ino); 2698 } 2699 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2700 p = xdr_reserve_space(xdr, 8); 2701 if (!p) 2702 goto out_resource; 2703 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2704 } 2705 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2706 p = xdr_reserve_space(xdr, 8); 2707 if (!p) 2708 goto out_resource; 2709 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2710 } 2711 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2712 p = xdr_reserve_space(xdr, 8); 2713 if (!p) 2714 goto out_resource; 2715 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2716 } 2717 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2718 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2719 if (status) 2720 goto out; 2721 } 2722 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2723 p = xdr_reserve_space(xdr, 4); 2724 if (!p) 2725 goto out_resource; 2726 *p++ = cpu_to_be32(1); 2727 } 2728 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2729 p = xdr_reserve_space(xdr, 8); 2730 if (!p) 2731 goto out_resource; 2732 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2733 } 2734 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2735 p = xdr_reserve_space(xdr, 4); 2736 if (!p) 2737 goto out_resource; 2738 *p++ = cpu_to_be32(255); 2739 } 2740 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2741 p = xdr_reserve_space(xdr, 4); 2742 if (!p) 2743 goto out_resource; 2744 *p++ = cpu_to_be32(statfs.f_namelen); 2745 } 2746 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2747 p = xdr_reserve_space(xdr, 8); 2748 if (!p) 2749 goto out_resource; 2750 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2751 } 2752 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2753 p = xdr_reserve_space(xdr, 8); 2754 if (!p) 2755 goto out_resource; 2756 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2757 } 2758 if (bmval1 & FATTR4_WORD1_MODE) { 2759 p = xdr_reserve_space(xdr, 4); 2760 if (!p) 2761 goto out_resource; 2762 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2763 } 2764 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2765 p = xdr_reserve_space(xdr, 4); 2766 if (!p) 2767 goto out_resource; 2768 *p++ = cpu_to_be32(1); 2769 } 2770 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2771 p = xdr_reserve_space(xdr, 4); 2772 if (!p) 2773 goto out_resource; 2774 *p++ = cpu_to_be32(stat.nlink); 2775 } 2776 if (bmval1 & FATTR4_WORD1_OWNER) { 2777 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2778 if (status) 2779 goto out; 2780 } 2781 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2782 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2783 if (status) 2784 goto out; 2785 } 2786 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2787 p = xdr_reserve_space(xdr, 8); 2788 if (!p) 2789 goto out_resource; 2790 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2791 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2792 } 2793 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2794 p = xdr_reserve_space(xdr, 8); 2795 if (!p) 2796 goto out_resource; 2797 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2798 p = xdr_encode_hyper(p, dummy64); 2799 } 2800 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2801 p = xdr_reserve_space(xdr, 8); 2802 if (!p) 2803 goto out_resource; 2804 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2805 p = xdr_encode_hyper(p, dummy64); 2806 } 2807 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2808 p = xdr_reserve_space(xdr, 8); 2809 if (!p) 2810 goto out_resource; 2811 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2812 p = xdr_encode_hyper(p, dummy64); 2813 } 2814 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2815 p = xdr_reserve_space(xdr, 8); 2816 if (!p) 2817 goto out_resource; 2818 dummy64 = (u64)stat.blocks << 9; 2819 p = xdr_encode_hyper(p, dummy64); 2820 } 2821 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2822 p = xdr_reserve_space(xdr, 12); 2823 if (!p) 2824 goto out_resource; 2825 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2826 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2827 } 2828 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2829 p = xdr_reserve_space(xdr, 12); 2830 if (!p) 2831 goto out_resource; 2832 p = encode_time_delta(p, d_inode(dentry)); 2833 } 2834 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2835 p = xdr_reserve_space(xdr, 12); 2836 if (!p) 2837 goto out_resource; 2838 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2839 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2840 } 2841 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2842 p = xdr_reserve_space(xdr, 12); 2843 if (!p) 2844 goto out_resource; 2845 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2846 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2847 } 2848 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2849 struct kstat parent_stat; 2850 u64 ino = stat.ino; 2851 2852 p = xdr_reserve_space(xdr, 8); 2853 if (!p) 2854 goto out_resource; 2855 /* 2856 * Get parent's attributes if not ignoring crossmount 2857 * and this is the root of a cross-mounted filesystem. 2858 */ 2859 if (ignore_crossmnt == 0 && 2860 dentry == exp->ex_path.mnt->mnt_root) { 2861 err = get_parent_attributes(exp, &parent_stat); 2862 if (err) 2863 goto out_nfserr; 2864 ino = parent_stat.ino; 2865 } 2866 p = xdr_encode_hyper(p, ino); 2867 } 2868 #ifdef CONFIG_NFSD_PNFS 2869 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2870 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2871 if (status) 2872 goto out; 2873 } 2874 2875 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2876 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2877 if (status) 2878 goto out; 2879 } 2880 2881 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2882 p = xdr_reserve_space(xdr, 4); 2883 if (!p) 2884 goto out_resource; 2885 *p++ = cpu_to_be32(stat.blksize); 2886 } 2887 #endif /* CONFIG_NFSD_PNFS */ 2888 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2889 u32 supp[3]; 2890 2891 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); 2892 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; 2893 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; 2894 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; 2895 2896 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); 2897 if (status) 2898 goto out; 2899 } 2900 2901 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) { 2902 p = xdr_reserve_space(xdr, 4); 2903 if (!p) 2904 goto out_resource; 2905 if (IS_I_VERSION(d_inode(dentry))) 2906 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR); 2907 else 2908 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA); 2909 } 2910 2911 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2912 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2913 status = nfsd4_encode_security_label(xdr, rqstp, context, 2914 contextlen); 2915 if (status) 2916 goto out; 2917 } 2918 #endif 2919 2920 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2921 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2922 status = nfs_ok; 2923 2924 out: 2925 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2926 if (context) 2927 security_release_secctx(context, contextlen); 2928 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2929 kfree(acl); 2930 if (tempfh) { 2931 fh_put(tempfh); 2932 kfree(tempfh); 2933 } 2934 if (status) 2935 xdr_truncate_encode(xdr, starting_len); 2936 return status; 2937 out_nfserr: 2938 status = nfserrno(err); 2939 goto out; 2940 out_resource: 2941 status = nfserr_resource; 2942 goto out; 2943 } 2944 2945 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2946 struct xdr_buf *buf, __be32 *p, int bytes) 2947 { 2948 xdr->scratch.iov_len = 0; 2949 memset(buf, 0, sizeof(struct xdr_buf)); 2950 buf->head[0].iov_base = p; 2951 buf->head[0].iov_len = 0; 2952 buf->len = 0; 2953 xdr->buf = buf; 2954 xdr->iov = buf->head; 2955 xdr->p = p; 2956 xdr->end = (void *)p + bytes; 2957 buf->buflen = bytes; 2958 } 2959 2960 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2961 struct svc_fh *fhp, struct svc_export *exp, 2962 struct dentry *dentry, u32 *bmval, 2963 struct svc_rqst *rqstp, int ignore_crossmnt) 2964 { 2965 struct xdr_buf dummy; 2966 struct xdr_stream xdr; 2967 __be32 ret; 2968 2969 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2970 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2971 ignore_crossmnt); 2972 *p = xdr.p; 2973 return ret; 2974 } 2975 2976 static inline int attributes_need_mount(u32 *bmval) 2977 { 2978 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2979 return 1; 2980 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2981 return 1; 2982 return 0; 2983 } 2984 2985 static __be32 2986 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2987 const char *name, int namlen) 2988 { 2989 struct svc_export *exp = cd->rd_fhp->fh_export; 2990 struct dentry *dentry; 2991 __be32 nfserr; 2992 int ignore_crossmnt = 0; 2993 2994 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2995 if (IS_ERR(dentry)) 2996 return nfserrno(PTR_ERR(dentry)); 2997 2998 exp_get(exp); 2999 /* 3000 * In the case of a mountpoint, the client may be asking for 3001 * attributes that are only properties of the underlying filesystem 3002 * as opposed to the cross-mounted file system. In such a case, 3003 * we will not follow the cross mount and will fill the attribtutes 3004 * directly from the mountpoint dentry. 3005 */ 3006 if (nfsd_mountpoint(dentry, exp)) { 3007 int err; 3008 3009 if (!(exp->ex_flags & NFSEXP_V4ROOT) 3010 && !attributes_need_mount(cd->rd_bmval)) { 3011 ignore_crossmnt = 1; 3012 goto out_encode; 3013 } 3014 /* 3015 * Why the heck aren't we just using nfsd_lookup?? 3016 * Different "."/".." handling? Something else? 3017 * At least, add a comment here to explain.... 3018 */ 3019 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 3020 if (err) { 3021 nfserr = nfserrno(err); 3022 goto out_put; 3023 } 3024 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 3025 if (nfserr) 3026 goto out_put; 3027 3028 } 3029 out_encode: 3030 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 3031 cd->rd_rqstp, ignore_crossmnt); 3032 out_put: 3033 dput(dentry); 3034 exp_put(exp); 3035 return nfserr; 3036 } 3037 3038 static __be32 * 3039 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 3040 { 3041 __be32 *p; 3042 3043 p = xdr_reserve_space(xdr, 20); 3044 if (!p) 3045 return NULL; 3046 *p++ = htonl(2); 3047 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 3048 *p++ = htonl(0); /* bmval1 */ 3049 3050 *p++ = htonl(4); /* attribute length */ 3051 *p++ = nfserr; /* no htonl */ 3052 return p; 3053 } 3054 3055 static int 3056 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 3057 loff_t offset, u64 ino, unsigned int d_type) 3058 { 3059 struct readdir_cd *ccd = ccdv; 3060 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 3061 struct xdr_stream *xdr = cd->xdr; 3062 int start_offset = xdr->buf->len; 3063 int cookie_offset; 3064 u32 name_and_cookie; 3065 int entry_bytes; 3066 __be32 nfserr = nfserr_toosmall; 3067 __be64 wire_offset; 3068 __be32 *p; 3069 3070 /* In nfsv4, "." and ".." never make it onto the wire.. */ 3071 if (name && isdotent(name, namlen)) { 3072 cd->common.err = nfs_ok; 3073 return 0; 3074 } 3075 3076 if (cd->cookie_offset) { 3077 wire_offset = cpu_to_be64(offset); 3078 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 3079 &wire_offset, 8); 3080 } 3081 3082 p = xdr_reserve_space(xdr, 4); 3083 if (!p) 3084 goto fail; 3085 *p++ = xdr_one; /* mark entry present */ 3086 cookie_offset = xdr->buf->len; 3087 p = xdr_reserve_space(xdr, 3*4 + namlen); 3088 if (!p) 3089 goto fail; 3090 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 3091 p = xdr_encode_array(p, name, namlen); /* name length & name */ 3092 3093 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 3094 switch (nfserr) { 3095 case nfs_ok: 3096 break; 3097 case nfserr_resource: 3098 nfserr = nfserr_toosmall; 3099 goto fail; 3100 case nfserr_noent: 3101 xdr_truncate_encode(xdr, start_offset); 3102 goto skip_entry; 3103 default: 3104 /* 3105 * If the client requested the RDATTR_ERROR attribute, 3106 * we stuff the error code into this attribute 3107 * and continue. If this attribute was not requested, 3108 * then in accordance with the spec, we fail the 3109 * entire READDIR operation(!) 3110 */ 3111 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 3112 goto fail; 3113 p = nfsd4_encode_rdattr_error(xdr, nfserr); 3114 if (p == NULL) { 3115 nfserr = nfserr_toosmall; 3116 goto fail; 3117 } 3118 } 3119 nfserr = nfserr_toosmall; 3120 entry_bytes = xdr->buf->len - start_offset; 3121 if (entry_bytes > cd->rd_maxcount) 3122 goto fail; 3123 cd->rd_maxcount -= entry_bytes; 3124 /* 3125 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3126 * let's always let through the first entry, at least: 3127 */ 3128 if (!cd->rd_dircount) 3129 goto fail; 3130 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3131 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3132 goto fail; 3133 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3134 3135 cd->cookie_offset = cookie_offset; 3136 skip_entry: 3137 cd->common.err = nfs_ok; 3138 return 0; 3139 fail: 3140 xdr_truncate_encode(xdr, start_offset); 3141 cd->common.err = nfserr; 3142 return -EINVAL; 3143 } 3144 3145 static __be32 3146 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3147 { 3148 __be32 *p; 3149 3150 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3151 if (!p) 3152 return nfserr_resource; 3153 *p++ = cpu_to_be32(sid->si_generation); 3154 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3155 sizeof(stateid_opaque_t)); 3156 return 0; 3157 } 3158 3159 static __be32 3160 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3161 { 3162 struct xdr_stream *xdr = &resp->xdr; 3163 __be32 *p; 3164 3165 p = xdr_reserve_space(xdr, 8); 3166 if (!p) 3167 return nfserr_resource; 3168 *p++ = cpu_to_be32(access->ac_supported); 3169 *p++ = cpu_to_be32(access->ac_resp_access); 3170 return 0; 3171 } 3172 3173 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3174 { 3175 struct xdr_stream *xdr = &resp->xdr; 3176 __be32 *p; 3177 3178 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3179 if (!p) 3180 return nfserr_resource; 3181 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3182 NFS4_MAX_SESSIONID_LEN); 3183 *p++ = cpu_to_be32(bcts->dir); 3184 /* Upshifting from TCP to RDMA is not supported */ 3185 *p++ = cpu_to_be32(0); 3186 return 0; 3187 } 3188 3189 static __be32 3190 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3191 { 3192 struct xdr_stream *xdr = &resp->xdr; 3193 3194 return nfsd4_encode_stateid(xdr, &close->cl_stateid); 3195 } 3196 3197 3198 static __be32 3199 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3200 { 3201 struct xdr_stream *xdr = &resp->xdr; 3202 __be32 *p; 3203 3204 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3205 if (!p) 3206 return nfserr_resource; 3207 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3208 NFS4_VERIFIER_SIZE); 3209 return 0; 3210 } 3211 3212 static __be32 3213 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3214 { 3215 struct xdr_stream *xdr = &resp->xdr; 3216 __be32 *p; 3217 3218 p = xdr_reserve_space(xdr, 20); 3219 if (!p) 3220 return nfserr_resource; 3221 encode_cinfo(p, &create->cr_cinfo); 3222 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3223 create->cr_bmval[1], create->cr_bmval[2]); 3224 } 3225 3226 static __be32 3227 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3228 { 3229 struct svc_fh *fhp = getattr->ga_fhp; 3230 struct xdr_stream *xdr = &resp->xdr; 3231 3232 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3233 getattr->ga_bmval, resp->rqstp, 0); 3234 } 3235 3236 static __be32 3237 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3238 { 3239 struct xdr_stream *xdr = &resp->xdr; 3240 struct svc_fh *fhp = *fhpp; 3241 unsigned int len; 3242 __be32 *p; 3243 3244 len = fhp->fh_handle.fh_size; 3245 p = xdr_reserve_space(xdr, len + 4); 3246 if (!p) 3247 return nfserr_resource; 3248 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3249 return 0; 3250 } 3251 3252 /* 3253 * Including all fields other than the name, a LOCK4denied structure requires 3254 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3255 */ 3256 static __be32 3257 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3258 { 3259 struct xdr_netobj *conf = &ld->ld_owner; 3260 __be32 *p; 3261 3262 again: 3263 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3264 if (!p) { 3265 /* 3266 * Don't fail to return the result just because we can't 3267 * return the conflicting open: 3268 */ 3269 if (conf->len) { 3270 kfree(conf->data); 3271 conf->len = 0; 3272 conf->data = NULL; 3273 goto again; 3274 } 3275 return nfserr_resource; 3276 } 3277 p = xdr_encode_hyper(p, ld->ld_start); 3278 p = xdr_encode_hyper(p, ld->ld_length); 3279 *p++ = cpu_to_be32(ld->ld_type); 3280 if (conf->len) { 3281 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3282 p = xdr_encode_opaque(p, conf->data, conf->len); 3283 kfree(conf->data); 3284 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3285 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3286 *p++ = cpu_to_be32(0); /* length of owner name */ 3287 } 3288 return nfserr_denied; 3289 } 3290 3291 static __be32 3292 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3293 { 3294 struct xdr_stream *xdr = &resp->xdr; 3295 3296 if (!nfserr) 3297 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3298 else if (nfserr == nfserr_denied) 3299 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3300 3301 return nfserr; 3302 } 3303 3304 static __be32 3305 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3306 { 3307 struct xdr_stream *xdr = &resp->xdr; 3308 3309 if (nfserr == nfserr_denied) 3310 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3311 return nfserr; 3312 } 3313 3314 static __be32 3315 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3316 { 3317 struct xdr_stream *xdr = &resp->xdr; 3318 3319 return nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3320 } 3321 3322 3323 static __be32 3324 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3325 { 3326 struct xdr_stream *xdr = &resp->xdr; 3327 __be32 *p; 3328 3329 p = xdr_reserve_space(xdr, 20); 3330 if (!p) 3331 return nfserr_resource; 3332 p = encode_cinfo(p, &link->li_cinfo); 3333 return 0; 3334 } 3335 3336 3337 static __be32 3338 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3339 { 3340 struct xdr_stream *xdr = &resp->xdr; 3341 __be32 *p; 3342 3343 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3344 if (nfserr) 3345 return nfserr; 3346 p = xdr_reserve_space(xdr, 24); 3347 if (!p) 3348 return nfserr_resource; 3349 p = encode_cinfo(p, &open->op_cinfo); 3350 *p++ = cpu_to_be32(open->op_rflags); 3351 3352 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3353 open->op_bmval[2]); 3354 if (nfserr) 3355 return nfserr; 3356 3357 p = xdr_reserve_space(xdr, 4); 3358 if (!p) 3359 return nfserr_resource; 3360 3361 *p++ = cpu_to_be32(open->op_delegate_type); 3362 switch (open->op_delegate_type) { 3363 case NFS4_OPEN_DELEGATE_NONE: 3364 break; 3365 case NFS4_OPEN_DELEGATE_READ: 3366 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3367 if (nfserr) 3368 return nfserr; 3369 p = xdr_reserve_space(xdr, 20); 3370 if (!p) 3371 return nfserr_resource; 3372 *p++ = cpu_to_be32(open->op_recall); 3373 3374 /* 3375 * TODO: ACE's in delegations 3376 */ 3377 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3378 *p++ = cpu_to_be32(0); 3379 *p++ = cpu_to_be32(0); 3380 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3381 break; 3382 case NFS4_OPEN_DELEGATE_WRITE: 3383 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3384 if (nfserr) 3385 return nfserr; 3386 p = xdr_reserve_space(xdr, 32); 3387 if (!p) 3388 return nfserr_resource; 3389 *p++ = cpu_to_be32(0); 3390 3391 /* 3392 * TODO: space_limit's in delegations 3393 */ 3394 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3395 *p++ = cpu_to_be32(~(u32)0); 3396 *p++ = cpu_to_be32(~(u32)0); 3397 3398 /* 3399 * TODO: ACE's in delegations 3400 */ 3401 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3402 *p++ = cpu_to_be32(0); 3403 *p++ = cpu_to_be32(0); 3404 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3405 break; 3406 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3407 switch (open->op_why_no_deleg) { 3408 case WND4_CONTENTION: 3409 case WND4_RESOURCE: 3410 p = xdr_reserve_space(xdr, 8); 3411 if (!p) 3412 return nfserr_resource; 3413 *p++ = cpu_to_be32(open->op_why_no_deleg); 3414 /* deleg signaling not supported yet: */ 3415 *p++ = cpu_to_be32(0); 3416 break; 3417 default: 3418 p = xdr_reserve_space(xdr, 4); 3419 if (!p) 3420 return nfserr_resource; 3421 *p++ = cpu_to_be32(open->op_why_no_deleg); 3422 } 3423 break; 3424 default: 3425 BUG(); 3426 } 3427 /* XXX save filehandle here */ 3428 return 0; 3429 } 3430 3431 static __be32 3432 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3433 { 3434 struct xdr_stream *xdr = &resp->xdr; 3435 3436 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3437 } 3438 3439 static __be32 3440 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3441 { 3442 struct xdr_stream *xdr = &resp->xdr; 3443 3444 return nfsd4_encode_stateid(xdr, &od->od_stateid); 3445 } 3446 3447 static __be32 nfsd4_encode_splice_read( 3448 struct nfsd4_compoundres *resp, 3449 struct nfsd4_read *read, 3450 struct file *file, unsigned long maxcount) 3451 { 3452 struct xdr_stream *xdr = &resp->xdr; 3453 struct xdr_buf *buf = xdr->buf; 3454 u32 eof; 3455 int space_left; 3456 __be32 nfserr; 3457 __be32 *p = xdr->p - 2; 3458 3459 /* Make sure there will be room for padding if needed */ 3460 if (xdr->end - xdr->p < 1) 3461 return nfserr_resource; 3462 3463 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, 3464 file, read->rd_offset, &maxcount, &eof); 3465 read->rd_length = maxcount; 3466 if (nfserr) { 3467 /* 3468 * nfsd_splice_actor may have already messed with the 3469 * page length; reset it so as not to confuse 3470 * xdr_truncate_encode: 3471 */ 3472 buf->page_len = 0; 3473 return nfserr; 3474 } 3475 3476 *(p++) = htonl(eof); 3477 *(p++) = htonl(maxcount); 3478 3479 buf->page_len = maxcount; 3480 buf->len += maxcount; 3481 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3482 / PAGE_SIZE; 3483 3484 /* Use rest of head for padding and remaining ops: */ 3485 buf->tail[0].iov_base = xdr->p; 3486 buf->tail[0].iov_len = 0; 3487 xdr->iov = buf->tail; 3488 if (maxcount&3) { 3489 int pad = 4 - (maxcount&3); 3490 3491 *(xdr->p++) = 0; 3492 3493 buf->tail[0].iov_base += maxcount&3; 3494 buf->tail[0].iov_len = pad; 3495 buf->len += pad; 3496 } 3497 3498 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3499 buf->buflen - buf->len); 3500 buf->buflen = buf->len + space_left; 3501 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3502 3503 return 0; 3504 } 3505 3506 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3507 struct nfsd4_read *read, 3508 struct file *file, unsigned long maxcount) 3509 { 3510 struct xdr_stream *xdr = &resp->xdr; 3511 u32 eof; 3512 int v; 3513 int starting_len = xdr->buf->len - 8; 3514 long len; 3515 int thislen; 3516 __be32 nfserr; 3517 __be32 tmp; 3518 __be32 *p; 3519 u32 zzz = 0; 3520 int pad; 3521 3522 len = maxcount; 3523 v = 0; 3524 3525 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3526 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3527 WARN_ON_ONCE(!p); 3528 resp->rqstp->rq_vec[v].iov_base = p; 3529 resp->rqstp->rq_vec[v].iov_len = thislen; 3530 v++; 3531 len -= thislen; 3532 3533 while (len) { 3534 thislen = min_t(long, len, PAGE_SIZE); 3535 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3536 WARN_ON_ONCE(!p); 3537 resp->rqstp->rq_vec[v].iov_base = p; 3538 resp->rqstp->rq_vec[v].iov_len = thislen; 3539 v++; 3540 len -= thislen; 3541 } 3542 read->rd_vlen = v; 3543 3544 len = maxcount; 3545 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, 3546 resp->rqstp->rq_vec, read->rd_vlen, &maxcount, 3547 &eof); 3548 read->rd_length = maxcount; 3549 if (nfserr) 3550 return nfserr; 3551 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3552 3553 tmp = htonl(eof); 3554 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3555 tmp = htonl(maxcount); 3556 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3557 3558 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3559 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3560 &zzz, pad); 3561 return 0; 3562 3563 } 3564 3565 static __be32 3566 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3567 struct nfsd4_read *read) 3568 { 3569 unsigned long maxcount; 3570 struct xdr_stream *xdr = &resp->xdr; 3571 struct file *file; 3572 int starting_len = xdr->buf->len; 3573 __be32 *p; 3574 3575 if (nfserr) 3576 return nfserr; 3577 file = read->rd_nf->nf_file; 3578 3579 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3580 if (!p) { 3581 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3582 return nfserr_resource; 3583 } 3584 if (resp->xdr.buf->page_len && 3585 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3586 WARN_ON_ONCE(1); 3587 return nfserr_resource; 3588 } 3589 xdr_commit_encode(xdr); 3590 3591 maxcount = svc_max_payload(resp->rqstp); 3592 maxcount = min_t(unsigned long, maxcount, 3593 (xdr->buf->buflen - xdr->buf->len)); 3594 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3595 3596 if (file->f_op->splice_read && 3597 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3598 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3599 else 3600 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3601 3602 if (nfserr) 3603 xdr_truncate_encode(xdr, starting_len); 3604 3605 return nfserr; 3606 } 3607 3608 static __be32 3609 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3610 { 3611 int maxcount; 3612 __be32 wire_count; 3613 int zero = 0; 3614 struct xdr_stream *xdr = &resp->xdr; 3615 int length_offset = xdr->buf->len; 3616 __be32 *p; 3617 3618 p = xdr_reserve_space(xdr, 4); 3619 if (!p) 3620 return nfserr_resource; 3621 maxcount = PAGE_SIZE; 3622 3623 p = xdr_reserve_space(xdr, maxcount); 3624 if (!p) 3625 return nfserr_resource; 3626 /* 3627 * XXX: By default, vfs_readlink() will truncate symlinks if they 3628 * would overflow the buffer. Is this kosher in NFSv4? If not, one 3629 * easy fix is: if vfs_readlink() precisely fills the buffer, assume 3630 * that truncation occurred, and return NFS4ERR_RESOURCE. 3631 */ 3632 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3633 (char *)p, &maxcount); 3634 if (nfserr == nfserr_isdir) 3635 nfserr = nfserr_inval; 3636 if (nfserr) { 3637 xdr_truncate_encode(xdr, length_offset); 3638 return nfserr; 3639 } 3640 3641 wire_count = htonl(maxcount); 3642 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3643 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3644 if (maxcount & 3) 3645 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3646 &zero, 4 - (maxcount&3)); 3647 return 0; 3648 } 3649 3650 static __be32 3651 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3652 { 3653 int maxcount; 3654 int bytes_left; 3655 loff_t offset; 3656 __be64 wire_offset; 3657 struct xdr_stream *xdr = &resp->xdr; 3658 int starting_len = xdr->buf->len; 3659 __be32 *p; 3660 3661 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3662 if (!p) 3663 return nfserr_resource; 3664 3665 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3666 *p++ = cpu_to_be32(0); 3667 *p++ = cpu_to_be32(0); 3668 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3669 - (char *)resp->xdr.buf->head[0].iov_base; 3670 3671 /* 3672 * Number of bytes left for directory entries allowing for the 3673 * final 8 bytes of the readdir and a following failed op: 3674 */ 3675 bytes_left = xdr->buf->buflen - xdr->buf->len 3676 - COMPOUND_ERR_SLACK_SPACE - 8; 3677 if (bytes_left < 0) { 3678 nfserr = nfserr_resource; 3679 goto err_no_verf; 3680 } 3681 maxcount = svc_max_payload(resp->rqstp); 3682 maxcount = min_t(u32, readdir->rd_maxcount, maxcount); 3683 /* 3684 * Note the rfc defines rd_maxcount as the size of the 3685 * READDIR4resok structure, which includes the verifier above 3686 * and the 8 bytes encoded at the end of this function: 3687 */ 3688 if (maxcount < 16) { 3689 nfserr = nfserr_toosmall; 3690 goto err_no_verf; 3691 } 3692 maxcount = min_t(int, maxcount-16, bytes_left); 3693 3694 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3695 if (!readdir->rd_dircount) 3696 readdir->rd_dircount = svc_max_payload(resp->rqstp); 3697 3698 readdir->xdr = xdr; 3699 readdir->rd_maxcount = maxcount; 3700 readdir->common.err = 0; 3701 readdir->cookie_offset = 0; 3702 3703 offset = readdir->rd_cookie; 3704 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3705 &offset, 3706 &readdir->common, nfsd4_encode_dirent); 3707 if (nfserr == nfs_ok && 3708 readdir->common.err == nfserr_toosmall && 3709 xdr->buf->len == starting_len + 8) { 3710 /* nothing encoded; which limit did we hit?: */ 3711 if (maxcount - 16 < bytes_left) 3712 /* It was the fault of rd_maxcount: */ 3713 nfserr = nfserr_toosmall; 3714 else 3715 /* We ran out of buffer space: */ 3716 nfserr = nfserr_resource; 3717 } 3718 if (nfserr) 3719 goto err_no_verf; 3720 3721 if (readdir->cookie_offset) { 3722 wire_offset = cpu_to_be64(offset); 3723 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3724 &wire_offset, 8); 3725 } 3726 3727 p = xdr_reserve_space(xdr, 8); 3728 if (!p) { 3729 WARN_ON_ONCE(1); 3730 goto err_no_verf; 3731 } 3732 *p++ = 0; /* no more entries */ 3733 *p++ = htonl(readdir->common.err == nfserr_eof); 3734 3735 return 0; 3736 err_no_verf: 3737 xdr_truncate_encode(xdr, starting_len); 3738 return nfserr; 3739 } 3740 3741 static __be32 3742 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3743 { 3744 struct xdr_stream *xdr = &resp->xdr; 3745 __be32 *p; 3746 3747 p = xdr_reserve_space(xdr, 20); 3748 if (!p) 3749 return nfserr_resource; 3750 p = encode_cinfo(p, &remove->rm_cinfo); 3751 return 0; 3752 } 3753 3754 static __be32 3755 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3756 { 3757 struct xdr_stream *xdr = &resp->xdr; 3758 __be32 *p; 3759 3760 p = xdr_reserve_space(xdr, 40); 3761 if (!p) 3762 return nfserr_resource; 3763 p = encode_cinfo(p, &rename->rn_sinfo); 3764 p = encode_cinfo(p, &rename->rn_tinfo); 3765 return 0; 3766 } 3767 3768 static __be32 3769 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) 3770 { 3771 u32 i, nflavs, supported; 3772 struct exp_flavor_info *flavs; 3773 struct exp_flavor_info def_flavs[2]; 3774 __be32 *p, *flavorsp; 3775 static bool report = true; 3776 3777 if (exp->ex_nflavors) { 3778 flavs = exp->ex_flavors; 3779 nflavs = exp->ex_nflavors; 3780 } else { /* Handling of some defaults in absence of real secinfo: */ 3781 flavs = def_flavs; 3782 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3783 nflavs = 2; 3784 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3785 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3786 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3787 nflavs = 1; 3788 flavs[0].pseudoflavor 3789 = svcauth_gss_flavor(exp->ex_client); 3790 } else { 3791 nflavs = 1; 3792 flavs[0].pseudoflavor 3793 = exp->ex_client->flavour->flavour; 3794 } 3795 } 3796 3797 supported = 0; 3798 p = xdr_reserve_space(xdr, 4); 3799 if (!p) 3800 return nfserr_resource; 3801 flavorsp = p++; /* to be backfilled later */ 3802 3803 for (i = 0; i < nflavs; i++) { 3804 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3805 struct rpcsec_gss_info info; 3806 3807 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3808 supported++; 3809 p = xdr_reserve_space(xdr, 4 + 4 + 3810 XDR_LEN(info.oid.len) + 4 + 4); 3811 if (!p) 3812 return nfserr_resource; 3813 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3814 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3815 *p++ = cpu_to_be32(info.qop); 3816 *p++ = cpu_to_be32(info.service); 3817 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3818 supported++; 3819 p = xdr_reserve_space(xdr, 4); 3820 if (!p) 3821 return nfserr_resource; 3822 *p++ = cpu_to_be32(pf); 3823 } else { 3824 if (report) 3825 pr_warn("NFS: SECINFO: security flavor %u " 3826 "is not supported\n", pf); 3827 } 3828 } 3829 3830 if (nflavs != supported) 3831 report = false; 3832 *flavorsp = htonl(supported); 3833 return 0; 3834 } 3835 3836 static __be32 3837 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3838 struct nfsd4_secinfo *secinfo) 3839 { 3840 struct xdr_stream *xdr = &resp->xdr; 3841 3842 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); 3843 } 3844 3845 static __be32 3846 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3847 struct nfsd4_secinfo_no_name *secinfo) 3848 { 3849 struct xdr_stream *xdr = &resp->xdr; 3850 3851 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); 3852 } 3853 3854 /* 3855 * The SETATTR encode routine is special -- it always encodes a bitmap, 3856 * regardless of the error status. 3857 */ 3858 static __be32 3859 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3860 { 3861 struct xdr_stream *xdr = &resp->xdr; 3862 __be32 *p; 3863 3864 p = xdr_reserve_space(xdr, 16); 3865 if (!p) 3866 return nfserr_resource; 3867 if (nfserr) { 3868 *p++ = cpu_to_be32(3); 3869 *p++ = cpu_to_be32(0); 3870 *p++ = cpu_to_be32(0); 3871 *p++ = cpu_to_be32(0); 3872 } 3873 else { 3874 *p++ = cpu_to_be32(3); 3875 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3876 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3877 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3878 } 3879 return nfserr; 3880 } 3881 3882 static __be32 3883 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3884 { 3885 struct xdr_stream *xdr = &resp->xdr; 3886 __be32 *p; 3887 3888 if (!nfserr) { 3889 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3890 if (!p) 3891 return nfserr_resource; 3892 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3893 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3894 NFS4_VERIFIER_SIZE); 3895 } 3896 else if (nfserr == nfserr_clid_inuse) { 3897 p = xdr_reserve_space(xdr, 8); 3898 if (!p) 3899 return nfserr_resource; 3900 *p++ = cpu_to_be32(0); 3901 *p++ = cpu_to_be32(0); 3902 } 3903 return nfserr; 3904 } 3905 3906 static __be32 3907 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3908 { 3909 struct xdr_stream *xdr = &resp->xdr; 3910 __be32 *p; 3911 3912 p = xdr_reserve_space(xdr, 16); 3913 if (!p) 3914 return nfserr_resource; 3915 *p++ = cpu_to_be32(write->wr_bytes_written); 3916 *p++ = cpu_to_be32(write->wr_how_written); 3917 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3918 NFS4_VERIFIER_SIZE); 3919 return 0; 3920 } 3921 3922 static __be32 3923 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3924 struct nfsd4_exchange_id *exid) 3925 { 3926 struct xdr_stream *xdr = &resp->xdr; 3927 __be32 *p; 3928 char *major_id; 3929 char *server_scope; 3930 int major_id_sz; 3931 int server_scope_sz; 3932 uint64_t minor_id = 0; 3933 3934 major_id = utsname()->nodename; 3935 major_id_sz = strlen(major_id); 3936 server_scope = utsname()->nodename; 3937 server_scope_sz = strlen(server_scope); 3938 3939 p = xdr_reserve_space(xdr, 3940 8 /* eir_clientid */ + 3941 4 /* eir_sequenceid */ + 3942 4 /* eir_flags */ + 3943 4 /* spr_how */); 3944 if (!p) 3945 return nfserr_resource; 3946 3947 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3948 *p++ = cpu_to_be32(exid->seqid); 3949 *p++ = cpu_to_be32(exid->flags); 3950 3951 *p++ = cpu_to_be32(exid->spa_how); 3952 3953 switch (exid->spa_how) { 3954 case SP4_NONE: 3955 break; 3956 case SP4_MACH_CRED: 3957 /* spo_must_enforce bitmap: */ 3958 nfserr = nfsd4_encode_bitmap(xdr, 3959 exid->spo_must_enforce[0], 3960 exid->spo_must_enforce[1], 3961 exid->spo_must_enforce[2]); 3962 if (nfserr) 3963 return nfserr; 3964 /* spo_must_allow bitmap: */ 3965 nfserr = nfsd4_encode_bitmap(xdr, 3966 exid->spo_must_allow[0], 3967 exid->spo_must_allow[1], 3968 exid->spo_must_allow[2]); 3969 if (nfserr) 3970 return nfserr; 3971 break; 3972 default: 3973 WARN_ON_ONCE(1); 3974 } 3975 3976 p = xdr_reserve_space(xdr, 3977 8 /* so_minor_id */ + 3978 4 /* so_major_id.len */ + 3979 (XDR_QUADLEN(major_id_sz) * 4) + 3980 4 /* eir_server_scope.len */ + 3981 (XDR_QUADLEN(server_scope_sz) * 4) + 3982 4 /* eir_server_impl_id.count (0) */); 3983 if (!p) 3984 return nfserr_resource; 3985 3986 /* The server_owner struct */ 3987 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3988 /* major id */ 3989 p = xdr_encode_opaque(p, major_id, major_id_sz); 3990 3991 /* Server scope */ 3992 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3993 3994 /* Implementation id */ 3995 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3996 return 0; 3997 } 3998 3999 static __be32 4000 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 4001 struct nfsd4_create_session *sess) 4002 { 4003 struct xdr_stream *xdr = &resp->xdr; 4004 __be32 *p; 4005 4006 p = xdr_reserve_space(xdr, 24); 4007 if (!p) 4008 return nfserr_resource; 4009 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 4010 NFS4_MAX_SESSIONID_LEN); 4011 *p++ = cpu_to_be32(sess->seqid); 4012 *p++ = cpu_to_be32(sess->flags); 4013 4014 p = xdr_reserve_space(xdr, 28); 4015 if (!p) 4016 return nfserr_resource; 4017 *p++ = cpu_to_be32(0); /* headerpadsz */ 4018 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 4019 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 4020 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 4021 *p++ = cpu_to_be32(sess->fore_channel.maxops); 4022 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 4023 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 4024 4025 if (sess->fore_channel.nr_rdma_attrs) { 4026 p = xdr_reserve_space(xdr, 4); 4027 if (!p) 4028 return nfserr_resource; 4029 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 4030 } 4031 4032 p = xdr_reserve_space(xdr, 28); 4033 if (!p) 4034 return nfserr_resource; 4035 *p++ = cpu_to_be32(0); /* headerpadsz */ 4036 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 4037 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 4038 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 4039 *p++ = cpu_to_be32(sess->back_channel.maxops); 4040 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 4041 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 4042 4043 if (sess->back_channel.nr_rdma_attrs) { 4044 p = xdr_reserve_space(xdr, 4); 4045 if (!p) 4046 return nfserr_resource; 4047 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4048 } 4049 return 0; 4050 } 4051 4052 static __be32 4053 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4054 struct nfsd4_sequence *seq) 4055 { 4056 struct xdr_stream *xdr = &resp->xdr; 4057 __be32 *p; 4058 4059 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4060 if (!p) 4061 return nfserr_resource; 4062 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4063 NFS4_MAX_SESSIONID_LEN); 4064 *p++ = cpu_to_be32(seq->seqid); 4065 *p++ = cpu_to_be32(seq->slotid); 4066 /* Note slotid's are numbered from zero: */ 4067 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4068 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4069 *p++ = cpu_to_be32(seq->status_flags); 4070 4071 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4072 return 0; 4073 } 4074 4075 static __be32 4076 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4077 struct nfsd4_test_stateid *test_stateid) 4078 { 4079 struct xdr_stream *xdr = &resp->xdr; 4080 struct nfsd4_test_stateid_id *stateid, *next; 4081 __be32 *p; 4082 4083 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4084 if (!p) 4085 return nfserr_resource; 4086 *p++ = htonl(test_stateid->ts_num_ids); 4087 4088 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4089 *p++ = stateid->ts_id_status; 4090 } 4091 4092 return 0; 4093 } 4094 4095 #ifdef CONFIG_NFSD_PNFS 4096 static __be32 4097 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4098 struct nfsd4_getdeviceinfo *gdev) 4099 { 4100 struct xdr_stream *xdr = &resp->xdr; 4101 const struct nfsd4_layout_ops *ops; 4102 u32 starting_len = xdr->buf->len, needed_len; 4103 __be32 *p; 4104 4105 p = xdr_reserve_space(xdr, 4); 4106 if (!p) 4107 return nfserr_resource; 4108 4109 *p++ = cpu_to_be32(gdev->gd_layout_type); 4110 4111 /* If maxcount is 0 then just update notifications */ 4112 if (gdev->gd_maxcount != 0) { 4113 ops = nfsd4_layout_ops[gdev->gd_layout_type]; 4114 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4115 if (nfserr) { 4116 /* 4117 * We don't bother to burden the layout drivers with 4118 * enforcing gd_maxcount, just tell the client to 4119 * come back with a bigger buffer if it's not enough. 4120 */ 4121 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4122 goto toosmall; 4123 return nfserr; 4124 } 4125 } 4126 4127 if (gdev->gd_notify_types) { 4128 p = xdr_reserve_space(xdr, 4 + 4); 4129 if (!p) 4130 return nfserr_resource; 4131 *p++ = cpu_to_be32(1); /* bitmap length */ 4132 *p++ = cpu_to_be32(gdev->gd_notify_types); 4133 } else { 4134 p = xdr_reserve_space(xdr, 4); 4135 if (!p) 4136 return nfserr_resource; 4137 *p++ = 0; 4138 } 4139 4140 return 0; 4141 toosmall: 4142 dprintk("%s: maxcount too small\n", __func__); 4143 needed_len = xdr->buf->len + 4 /* notifications */; 4144 xdr_truncate_encode(xdr, starting_len); 4145 p = xdr_reserve_space(xdr, 4); 4146 if (!p) 4147 return nfserr_resource; 4148 *p++ = cpu_to_be32(needed_len); 4149 return nfserr_toosmall; 4150 } 4151 4152 static __be32 4153 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4154 struct nfsd4_layoutget *lgp) 4155 { 4156 struct xdr_stream *xdr = &resp->xdr; 4157 const struct nfsd4_layout_ops *ops; 4158 __be32 *p; 4159 4160 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4161 if (!p) 4162 return nfserr_resource; 4163 4164 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4165 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4166 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4167 sizeof(stateid_opaque_t)); 4168 4169 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4170 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4171 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4172 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4173 *p++ = cpu_to_be32(lgp->lg_layout_type); 4174 4175 ops = nfsd4_layout_ops[lgp->lg_layout_type]; 4176 return ops->encode_layoutget(xdr, lgp); 4177 } 4178 4179 static __be32 4180 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4181 struct nfsd4_layoutcommit *lcp) 4182 { 4183 struct xdr_stream *xdr = &resp->xdr; 4184 __be32 *p; 4185 4186 p = xdr_reserve_space(xdr, 4); 4187 if (!p) 4188 return nfserr_resource; 4189 *p++ = cpu_to_be32(lcp->lc_size_chg); 4190 if (lcp->lc_size_chg) { 4191 p = xdr_reserve_space(xdr, 8); 4192 if (!p) 4193 return nfserr_resource; 4194 p = xdr_encode_hyper(p, lcp->lc_newsize); 4195 } 4196 4197 return 0; 4198 } 4199 4200 static __be32 4201 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4202 struct nfsd4_layoutreturn *lrp) 4203 { 4204 struct xdr_stream *xdr = &resp->xdr; 4205 __be32 *p; 4206 4207 p = xdr_reserve_space(xdr, 4); 4208 if (!p) 4209 return nfserr_resource; 4210 *p++ = cpu_to_be32(lrp->lrs_present); 4211 if (lrp->lrs_present) 4212 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4213 return 0; 4214 } 4215 #endif /* CONFIG_NFSD_PNFS */ 4216 4217 static __be32 4218 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, 4219 struct nfsd42_write_res *write, bool sync) 4220 { 4221 __be32 *p; 4222 p = xdr_reserve_space(&resp->xdr, 4); 4223 if (!p) 4224 return nfserr_resource; 4225 4226 if (sync) 4227 *p++ = cpu_to_be32(0); 4228 else { 4229 __be32 nfserr; 4230 *p++ = cpu_to_be32(1); 4231 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid); 4232 if (nfserr) 4233 return nfserr; 4234 } 4235 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE); 4236 if (!p) 4237 return nfserr_resource; 4238 4239 p = xdr_encode_hyper(p, write->wr_bytes_written); 4240 *p++ = cpu_to_be32(write->wr_stable_how); 4241 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 4242 NFS4_VERIFIER_SIZE); 4243 return nfs_ok; 4244 } 4245 4246 static __be32 4247 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, 4248 struct nfsd4_copy *copy) 4249 { 4250 __be32 *p; 4251 4252 nfserr = nfsd42_encode_write_res(resp, ©->cp_res, 4253 copy->cp_synchronous); 4254 if (nfserr) 4255 return nfserr; 4256 4257 p = xdr_reserve_space(&resp->xdr, 4 + 4); 4258 *p++ = xdr_one; /* cr_consecutive */ 4259 *p++ = cpu_to_be32(copy->cp_synchronous); 4260 return 0; 4261 } 4262 4263 static __be32 4264 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, 4265 struct nfsd4_offload_status *os) 4266 { 4267 struct xdr_stream *xdr = &resp->xdr; 4268 __be32 *p; 4269 4270 p = xdr_reserve_space(xdr, 8 + 4); 4271 if (!p) 4272 return nfserr_resource; 4273 p = xdr_encode_hyper(p, os->count); 4274 *p++ = cpu_to_be32(0); 4275 4276 return nfserr; 4277 } 4278 4279 static __be32 4280 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4281 struct nfsd4_seek *seek) 4282 { 4283 __be32 *p; 4284 4285 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4286 *p++ = cpu_to_be32(seek->seek_eof); 4287 p = xdr_encode_hyper(p, seek->seek_pos); 4288 4289 return 0; 4290 } 4291 4292 static __be32 4293 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4294 { 4295 return nfserr; 4296 } 4297 4298 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4299 4300 /* 4301 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4302 * since we don't need to filter out obsolete ops as this is 4303 * done in the decoding phase. 4304 */ 4305 static const nfsd4_enc nfsd4_enc_ops[] = { 4306 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4307 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4308 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4309 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4310 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4311 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4312 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4313 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4314 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4315 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4316 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4317 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4318 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4319 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4320 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4321 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4322 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4323 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4324 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4325 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4326 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4327 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4328 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4329 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4330 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4331 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4332 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4333 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4334 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4335 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4336 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4337 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4338 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4339 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4340 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4341 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4342 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4343 4344 /* NFSv4.1 operations */ 4345 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4346 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4347 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4348 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4349 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4350 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4351 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4352 #ifdef CONFIG_NFSD_PNFS 4353 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4354 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4355 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4356 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4357 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4358 #else 4359 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4360 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4361 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4362 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4363 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4364 #endif 4365 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4366 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4367 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4368 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4369 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4370 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4371 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4372 4373 /* NFSv4.2 operations */ 4374 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4375 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, 4376 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4377 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4378 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4379 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4380 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4381 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4382 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status, 4383 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4384 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4385 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4386 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4387 }; 4388 4389 /* 4390 * Calculate whether we still have space to encode repsize bytes. 4391 * There are two considerations: 4392 * - For NFS versions >=4.1, the size of the reply must stay within 4393 * session limits 4394 * - For all NFS versions, we must stay within limited preallocated 4395 * buffer space. 4396 * 4397 * This is called before the operation is processed, so can only provide 4398 * an upper estimate. For some nonidempotent operations (such as 4399 * getattr), it's not necessarily a problem if that estimate is wrong, 4400 * as we can fail it after processing without significant side effects. 4401 */ 4402 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4403 { 4404 struct xdr_buf *buf = &resp->rqstp->rq_res; 4405 struct nfsd4_slot *slot = resp->cstate.slot; 4406 4407 if (buf->len + respsize <= buf->buflen) 4408 return nfs_ok; 4409 if (!nfsd4_has_session(&resp->cstate)) 4410 return nfserr_resource; 4411 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4412 WARN_ON_ONCE(1); 4413 return nfserr_rep_too_big_to_cache; 4414 } 4415 return nfserr_rep_too_big; 4416 } 4417 4418 void 4419 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4420 { 4421 struct xdr_stream *xdr = &resp->xdr; 4422 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4423 struct svc_rqst *rqstp = resp->rqstp; 4424 const struct nfsd4_operation *opdesc = op->opdesc; 4425 int post_err_offset; 4426 nfsd4_enc encoder; 4427 __be32 *p; 4428 4429 p = xdr_reserve_space(xdr, 8); 4430 if (!p) { 4431 WARN_ON_ONCE(1); 4432 return; 4433 } 4434 *p++ = cpu_to_be32(op->opnum); 4435 post_err_offset = xdr->buf->len; 4436 4437 if (op->opnum == OP_ILLEGAL) 4438 goto status; 4439 if (op->status && opdesc && 4440 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) 4441 goto status; 4442 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4443 !nfsd4_enc_ops[op->opnum]); 4444 encoder = nfsd4_enc_ops[op->opnum]; 4445 op->status = encoder(resp, op->status, &op->u); 4446 if (opdesc && opdesc->op_release) 4447 opdesc->op_release(&op->u); 4448 xdr_commit_encode(xdr); 4449 4450 /* nfsd4_check_resp_size guarantees enough room for error status */ 4451 if (!op->status) { 4452 int space_needed = 0; 4453 if (!nfsd4_last_compound_op(rqstp)) 4454 space_needed = COMPOUND_ERR_SLACK_SPACE; 4455 op->status = nfsd4_check_resp_size(resp, space_needed); 4456 } 4457 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4458 struct nfsd4_slot *slot = resp->cstate.slot; 4459 4460 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4461 op->status = nfserr_rep_too_big_to_cache; 4462 else 4463 op->status = nfserr_rep_too_big; 4464 } 4465 if (op->status == nfserr_resource || 4466 op->status == nfserr_rep_too_big || 4467 op->status == nfserr_rep_too_big_to_cache) { 4468 /* 4469 * The operation may have already been encoded or 4470 * partially encoded. No op returns anything additional 4471 * in the case of one of these three errors, so we can 4472 * just truncate back to after the status. But it's a 4473 * bug if we had to do this on a non-idempotent op: 4474 */ 4475 warn_on_nonidempotent_op(op); 4476 xdr_truncate_encode(xdr, post_err_offset); 4477 } 4478 if (so) { 4479 int len = xdr->buf->len - post_err_offset; 4480 4481 so->so_replay.rp_status = op->status; 4482 so->so_replay.rp_buflen = len; 4483 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4484 so->so_replay.rp_buf, len); 4485 } 4486 status: 4487 /* Note that op->status is already in network byte order: */ 4488 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4489 } 4490 4491 /* 4492 * Encode the reply stored in the stateowner reply cache 4493 * 4494 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4495 * previously sent already encoded operation. 4496 */ 4497 void 4498 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4499 { 4500 __be32 *p; 4501 struct nfs4_replay *rp = op->replay; 4502 4503 BUG_ON(!rp); 4504 4505 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4506 if (!p) { 4507 WARN_ON_ONCE(1); 4508 return; 4509 } 4510 *p++ = cpu_to_be32(op->opnum); 4511 *p++ = rp->rp_status; /* already xdr'ed */ 4512 4513 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4514 } 4515 4516 int 4517 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) 4518 { 4519 return xdr_ressize_check(rqstp, p); 4520 } 4521 4522 void nfsd4_release_compoundargs(struct svc_rqst *rqstp) 4523 { 4524 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4525 4526 if (args->ops != args->iops) { 4527 kfree(args->ops); 4528 args->ops = args->iops; 4529 } 4530 kfree(args->tmpp); 4531 args->tmpp = NULL; 4532 while (args->to_free) { 4533 struct svcxdr_tmpbuf *tb = args->to_free; 4534 args->to_free = tb->next; 4535 kfree(tb); 4536 } 4537 } 4538 4539 int 4540 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) 4541 { 4542 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4543 4544 if (rqstp->rq_arg.head[0].iov_len % 4) { 4545 /* client is nuts */ 4546 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4547 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4548 return 0; 4549 } 4550 args->p = p; 4551 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4552 args->pagelist = rqstp->rq_arg.pages; 4553 args->pagelen = rqstp->rq_arg.page_len; 4554 args->tail = false; 4555 args->tmpp = NULL; 4556 args->to_free = NULL; 4557 args->ops = args->iops; 4558 args->rqstp = rqstp; 4559 4560 return !nfsd4_decode_compound(args); 4561 } 4562 4563 int 4564 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) 4565 { 4566 /* 4567 * All that remains is to write the tag and operation count... 4568 */ 4569 struct nfsd4_compoundres *resp = rqstp->rq_resp; 4570 struct xdr_buf *buf = resp->xdr.buf; 4571 4572 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4573 buf->tail[0].iov_len); 4574 4575 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4576 4577 p = resp->tagp; 4578 *p++ = htonl(resp->taglen); 4579 memcpy(p, resp->tag, resp->taglen); 4580 p += XDR_QUADLEN(resp->taglen); 4581 *p++ = htonl(resp->opcnt); 4582 4583 nfsd4_sequence_done(resp); 4584 return 1; 4585 } 4586 4587 /* 4588 * Local variables: 4589 * c-basic-offset: 8 4590 * End: 4591 */ 4592