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/fs_struct.h> 37 #include <linux/file.h> 38 #include <linux/slab.h> 39 #include <linux/namei.h> 40 #include <linux/statfs.h> 41 #include <linux/utsname.h> 42 #include <linux/pagemap.h> 43 #include <linux/sunrpc/svcauth_gss.h> 44 45 #include "idmap.h" 46 #include "acl.h" 47 #include "xdr4.h" 48 #include "vfs.h" 49 #include "state.h" 50 #include "cache.h" 51 #include "netns.h" 52 #include "pnfs.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 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 + (argp->pagelen>>2); 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 if (avail + argp->pagelen < nbytes) 163 return NULL; 164 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 165 return NULL; 166 /* ok, we can do it with the current plus the next page */ 167 if (nbytes <= sizeof(argp->tmp)) 168 p = argp->tmp; 169 else { 170 kfree(argp->tmpp); 171 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 172 if (!p) 173 return NULL; 174 175 } 176 /* 177 * The following memcpy is safe because read_buf is always 178 * called with nbytes > avail, and the two cases above both 179 * guarantee p points to at least nbytes bytes. 180 */ 181 memcpy(p, argp->p, avail); 182 next_decode_page(argp); 183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 184 argp->p += XDR_QUADLEN(nbytes - avail); 185 return p; 186 } 187 188 static int zero_clientid(clientid_t *clid) 189 { 190 return (clid->cl_boot == 0) && (clid->cl_id == 0); 191 } 192 193 /** 194 * svcxdr_tmpalloc - allocate memory to be freed after compound processing 195 * @argp: NFSv4 compound argument structure 196 * @p: pointer to be freed (with kfree()) 197 * 198 * Marks @p to be freed when processing the compound operation 199 * described in @argp finishes. 200 */ 201 static void * 202 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) 203 { 204 struct svcxdr_tmpbuf *tb; 205 206 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); 207 if (!tb) 208 return NULL; 209 tb->next = argp->to_free; 210 argp->to_free = tb; 211 return tb->buf; 212 } 213 214 /* 215 * For xdr strings that need to be passed to other kernel api's 216 * as null-terminated strings. 217 * 218 * Note null-terminating in place usually isn't safe since the 219 * buffer might end on a page boundary. 220 */ 221 static char * 222 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) 223 { 224 char *p = svcxdr_tmpalloc(argp, len + 1); 225 226 if (!p) 227 return NULL; 228 memcpy(p, buf, len); 229 p[len] = '\0'; 230 return p; 231 } 232 233 /** 234 * savemem - duplicate a chunk of memory for later processing 235 * @argp: NFSv4 compound argument structure to be freed with 236 * @p: pointer to be duplicated 237 * @nbytes: length to be duplicated 238 * 239 * Returns a pointer to a copy of @nbytes bytes of memory at @p 240 * that are preserved until processing of the NFSv4 compound 241 * operation described by @argp finishes. 242 */ 243 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 244 { 245 void *ret; 246 247 ret = svcxdr_tmpalloc(argp, nbytes); 248 if (!ret) 249 return NULL; 250 memcpy(ret, p, nbytes); 251 return ret; 252 } 253 254 /* 255 * We require the high 32 bits of 'seconds' to be 0, and 256 * we ignore all 32 bits of 'nseconds'. 257 */ 258 static __be32 259 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv) 260 { 261 DECODE_HEAD; 262 u64 sec; 263 264 READ_BUF(12); 265 p = xdr_decode_hyper(p, &sec); 266 tv->tv_sec = sec; 267 tv->tv_nsec = be32_to_cpup(p++); 268 if (tv->tv_nsec >= (u32)1000000000) 269 return nfserr_inval; 270 271 DECODE_TAIL; 272 } 273 274 static __be32 275 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 276 { 277 u32 bmlen; 278 DECODE_HEAD; 279 280 bmval[0] = 0; 281 bmval[1] = 0; 282 bmval[2] = 0; 283 284 READ_BUF(4); 285 bmlen = be32_to_cpup(p++); 286 if (bmlen > 1000) 287 goto xdr_error; 288 289 READ_BUF(bmlen << 2); 290 if (bmlen > 0) 291 bmval[0] = be32_to_cpup(p++); 292 if (bmlen > 1) 293 bmval[1] = be32_to_cpup(p++); 294 if (bmlen > 2) 295 bmval[2] = be32_to_cpup(p++); 296 297 DECODE_TAIL; 298 } 299 300 static __be32 301 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 302 struct iattr *iattr, struct nfs4_acl **acl, 303 struct xdr_netobj *label, int *umask) 304 { 305 int expected_len, len = 0; 306 u32 dummy32; 307 char *buf; 308 309 DECODE_HEAD; 310 iattr->ia_valid = 0; 311 if ((status = nfsd4_decode_bitmap(argp, bmval))) 312 return status; 313 314 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 315 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 316 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { 317 if (nfsd_attrs_supported(argp->minorversion, bmval)) 318 return nfserr_inval; 319 return nfserr_attrnotsupp; 320 } 321 322 READ_BUF(4); 323 expected_len = be32_to_cpup(p++); 324 325 if (bmval[0] & FATTR4_WORD0_SIZE) { 326 READ_BUF(8); 327 len += 8; 328 p = xdr_decode_hyper(p, &iattr->ia_size); 329 iattr->ia_valid |= ATTR_SIZE; 330 } 331 if (bmval[0] & FATTR4_WORD0_ACL) { 332 u32 nace; 333 struct nfs4_ace *ace; 334 335 READ_BUF(4); len += 4; 336 nace = be32_to_cpup(p++); 337 338 if (nace > NFS4_ACL_MAX) 339 return nfserr_fbig; 340 341 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); 342 if (*acl == NULL) 343 return nfserr_jukebox; 344 345 (*acl)->naces = nace; 346 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 347 READ_BUF(16); len += 16; 348 ace->type = be32_to_cpup(p++); 349 ace->flag = be32_to_cpup(p++); 350 ace->access_mask = be32_to_cpup(p++); 351 dummy32 = be32_to_cpup(p++); 352 READ_BUF(dummy32); 353 len += XDR_QUADLEN(dummy32) << 2; 354 READMEM(buf, dummy32); 355 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 356 status = nfs_ok; 357 if (ace->whotype != NFS4_ACL_WHO_NAMED) 358 ; 359 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 360 status = nfsd_map_name_to_gid(argp->rqstp, 361 buf, dummy32, &ace->who_gid); 362 else 363 status = nfsd_map_name_to_uid(argp->rqstp, 364 buf, dummy32, &ace->who_uid); 365 if (status) 366 return status; 367 } 368 } else 369 *acl = NULL; 370 if (bmval[1] & FATTR4_WORD1_MODE) { 371 READ_BUF(4); 372 len += 4; 373 iattr->ia_mode = be32_to_cpup(p++); 374 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 375 iattr->ia_valid |= ATTR_MODE; 376 } 377 if (bmval[1] & FATTR4_WORD1_OWNER) { 378 READ_BUF(4); 379 len += 4; 380 dummy32 = be32_to_cpup(p++); 381 READ_BUF(dummy32); 382 len += (XDR_QUADLEN(dummy32) << 2); 383 READMEM(buf, dummy32); 384 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 385 return status; 386 iattr->ia_valid |= ATTR_UID; 387 } 388 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 389 READ_BUF(4); 390 len += 4; 391 dummy32 = be32_to_cpup(p++); 392 READ_BUF(dummy32); 393 len += (XDR_QUADLEN(dummy32) << 2); 394 READMEM(buf, dummy32); 395 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 396 return status; 397 iattr->ia_valid |= ATTR_GID; 398 } 399 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 400 READ_BUF(4); 401 len += 4; 402 dummy32 = be32_to_cpup(p++); 403 switch (dummy32) { 404 case NFS4_SET_TO_CLIENT_TIME: 405 len += 12; 406 status = nfsd4_decode_time(argp, &iattr->ia_atime); 407 if (status) 408 return status; 409 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 410 break; 411 case NFS4_SET_TO_SERVER_TIME: 412 iattr->ia_valid |= ATTR_ATIME; 413 break; 414 default: 415 goto xdr_error; 416 } 417 } 418 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 419 READ_BUF(4); 420 len += 4; 421 dummy32 = be32_to_cpup(p++); 422 switch (dummy32) { 423 case NFS4_SET_TO_CLIENT_TIME: 424 len += 12; 425 status = nfsd4_decode_time(argp, &iattr->ia_mtime); 426 if (status) 427 return status; 428 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 429 break; 430 case NFS4_SET_TO_SERVER_TIME: 431 iattr->ia_valid |= ATTR_MTIME; 432 break; 433 default: 434 goto xdr_error; 435 } 436 } 437 438 label->len = 0; 439 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 440 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { 441 READ_BUF(4); 442 len += 4; 443 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ 444 READ_BUF(4); 445 len += 4; 446 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ 447 READ_BUF(4); 448 len += 4; 449 dummy32 = be32_to_cpup(p++); 450 READ_BUF(dummy32); 451 if (dummy32 > NFS4_MAXLABELLEN) 452 return nfserr_badlabel; 453 len += (XDR_QUADLEN(dummy32) << 2); 454 READMEM(buf, dummy32); 455 label->len = dummy32; 456 label->data = svcxdr_dupstr(argp, buf, dummy32); 457 if (!label->data) 458 return nfserr_jukebox; 459 } 460 #endif 461 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { 462 if (!umask) 463 goto xdr_error; 464 READ_BUF(8); 465 len += 8; 466 dummy32 = be32_to_cpup(p++); 467 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO); 468 dummy32 = be32_to_cpup(p++); 469 *umask = dummy32 & S_IRWXUGO; 470 iattr->ia_valid |= ATTR_MODE; 471 } 472 if (len != expected_len) 473 goto xdr_error; 474 475 DECODE_TAIL; 476 } 477 478 static __be32 479 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 480 { 481 DECODE_HEAD; 482 483 READ_BUF(sizeof(stateid_t)); 484 sid->si_generation = be32_to_cpup(p++); 485 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 486 487 DECODE_TAIL; 488 } 489 490 static __be32 491 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 492 { 493 DECODE_HEAD; 494 495 READ_BUF(4); 496 access->ac_req_access = be32_to_cpup(p++); 497 498 DECODE_TAIL; 499 } 500 501 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 502 { 503 DECODE_HEAD; 504 u32 dummy, uid, gid; 505 char *machine_name; 506 int i; 507 int nr_secflavs; 508 509 /* callback_sec_params4 */ 510 READ_BUF(4); 511 nr_secflavs = be32_to_cpup(p++); 512 if (nr_secflavs) 513 cbs->flavor = (u32)(-1); 514 else 515 /* Is this legal? Be generous, take it to mean AUTH_NONE: */ 516 cbs->flavor = 0; 517 for (i = 0; i < nr_secflavs; ++i) { 518 READ_BUF(4); 519 dummy = be32_to_cpup(p++); 520 switch (dummy) { 521 case RPC_AUTH_NULL: 522 /* Nothing to read */ 523 if (cbs->flavor == (u32)(-1)) 524 cbs->flavor = RPC_AUTH_NULL; 525 break; 526 case RPC_AUTH_UNIX: 527 READ_BUF(8); 528 /* stamp */ 529 dummy = be32_to_cpup(p++); 530 531 /* machine name */ 532 dummy = be32_to_cpup(p++); 533 READ_BUF(dummy); 534 SAVEMEM(machine_name, dummy); 535 536 /* uid, gid */ 537 READ_BUF(8); 538 uid = be32_to_cpup(p++); 539 gid = be32_to_cpup(p++); 540 541 /* more gids */ 542 READ_BUF(4); 543 dummy = be32_to_cpup(p++); 544 READ_BUF(dummy * 4); 545 if (cbs->flavor == (u32)(-1)) { 546 kuid_t kuid = make_kuid(&init_user_ns, uid); 547 kgid_t kgid = make_kgid(&init_user_ns, gid); 548 if (uid_valid(kuid) && gid_valid(kgid)) { 549 cbs->uid = kuid; 550 cbs->gid = kgid; 551 cbs->flavor = RPC_AUTH_UNIX; 552 } else { 553 dprintk("RPC_AUTH_UNIX with invalid" 554 "uid or gid ignoring!\n"); 555 } 556 } 557 break; 558 case RPC_AUTH_GSS: 559 dprintk("RPC_AUTH_GSS callback secflavor " 560 "not supported!\n"); 561 READ_BUF(8); 562 /* gcbp_service */ 563 dummy = be32_to_cpup(p++); 564 /* gcbp_handle_from_server */ 565 dummy = be32_to_cpup(p++); 566 READ_BUF(dummy); 567 p += XDR_QUADLEN(dummy); 568 /* gcbp_handle_from_client */ 569 READ_BUF(4); 570 dummy = be32_to_cpup(p++); 571 READ_BUF(dummy); 572 break; 573 default: 574 dprintk("Illegal callback secflavor\n"); 575 return nfserr_inval; 576 } 577 } 578 DECODE_TAIL; 579 } 580 581 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 582 { 583 DECODE_HEAD; 584 585 READ_BUF(4); 586 bc->bc_cb_program = be32_to_cpup(p++); 587 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 588 589 DECODE_TAIL; 590 } 591 592 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 593 { 594 DECODE_HEAD; 595 596 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 597 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 598 bcts->dir = be32_to_cpup(p++); 599 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 600 * could help us figure out we should be using it. */ 601 DECODE_TAIL; 602 } 603 604 static __be32 605 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 606 { 607 DECODE_HEAD; 608 609 READ_BUF(4); 610 close->cl_seqid = be32_to_cpup(p++); 611 return nfsd4_decode_stateid(argp, &close->cl_stateid); 612 613 DECODE_TAIL; 614 } 615 616 617 static __be32 618 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 619 { 620 DECODE_HEAD; 621 622 READ_BUF(12); 623 p = xdr_decode_hyper(p, &commit->co_offset); 624 commit->co_count = be32_to_cpup(p++); 625 626 DECODE_TAIL; 627 } 628 629 static __be32 630 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 631 { 632 DECODE_HEAD; 633 634 READ_BUF(4); 635 create->cr_type = be32_to_cpup(p++); 636 switch (create->cr_type) { 637 case NF4LNK: 638 READ_BUF(4); 639 create->cr_datalen = be32_to_cpup(p++); 640 READ_BUF(create->cr_datalen); 641 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); 642 if (!create->cr_data) 643 return nfserr_jukebox; 644 break; 645 case NF4BLK: 646 case NF4CHR: 647 READ_BUF(8); 648 create->cr_specdata1 = be32_to_cpup(p++); 649 create->cr_specdata2 = be32_to_cpup(p++); 650 break; 651 case NF4SOCK: 652 case NF4FIFO: 653 case NF4DIR: 654 default: 655 break; 656 } 657 658 READ_BUF(4); 659 create->cr_namelen = be32_to_cpup(p++); 660 READ_BUF(create->cr_namelen); 661 SAVEMEM(create->cr_name, create->cr_namelen); 662 if ((status = check_filename(create->cr_name, create->cr_namelen))) 663 return status; 664 665 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 666 &create->cr_acl, &create->cr_label, 667 ¤t->fs->umask); 668 if (status) 669 goto out; 670 671 DECODE_TAIL; 672 } 673 674 static inline __be32 675 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 676 { 677 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 678 } 679 680 static inline __be32 681 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 682 { 683 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 684 } 685 686 static __be32 687 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 688 { 689 DECODE_HEAD; 690 691 READ_BUF(4); 692 link->li_namelen = be32_to_cpup(p++); 693 READ_BUF(link->li_namelen); 694 SAVEMEM(link->li_name, link->li_namelen); 695 if ((status = check_filename(link->li_name, link->li_namelen))) 696 return status; 697 698 DECODE_TAIL; 699 } 700 701 static __be32 702 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 703 { 704 DECODE_HEAD; 705 706 /* 707 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 708 */ 709 READ_BUF(28); 710 lock->lk_type = be32_to_cpup(p++); 711 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 712 goto xdr_error; 713 lock->lk_reclaim = be32_to_cpup(p++); 714 p = xdr_decode_hyper(p, &lock->lk_offset); 715 p = xdr_decode_hyper(p, &lock->lk_length); 716 lock->lk_is_new = be32_to_cpup(p++); 717 718 if (lock->lk_is_new) { 719 READ_BUF(4); 720 lock->lk_new_open_seqid = be32_to_cpup(p++); 721 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 722 if (status) 723 return status; 724 READ_BUF(8 + sizeof(clientid_t)); 725 lock->lk_new_lock_seqid = be32_to_cpup(p++); 726 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 727 lock->lk_new_owner.len = be32_to_cpup(p++); 728 READ_BUF(lock->lk_new_owner.len); 729 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 730 } else { 731 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 732 if (status) 733 return status; 734 READ_BUF(4); 735 lock->lk_old_lock_seqid = be32_to_cpup(p++); 736 } 737 738 DECODE_TAIL; 739 } 740 741 static __be32 742 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 743 { 744 DECODE_HEAD; 745 746 READ_BUF(32); 747 lockt->lt_type = be32_to_cpup(p++); 748 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 749 goto xdr_error; 750 p = xdr_decode_hyper(p, &lockt->lt_offset); 751 p = xdr_decode_hyper(p, &lockt->lt_length); 752 COPYMEM(&lockt->lt_clientid, 8); 753 lockt->lt_owner.len = be32_to_cpup(p++); 754 READ_BUF(lockt->lt_owner.len); 755 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 756 757 DECODE_TAIL; 758 } 759 760 static __be32 761 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 762 { 763 DECODE_HEAD; 764 765 READ_BUF(8); 766 locku->lu_type = be32_to_cpup(p++); 767 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 768 goto xdr_error; 769 locku->lu_seqid = be32_to_cpup(p++); 770 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 771 if (status) 772 return status; 773 READ_BUF(16); 774 p = xdr_decode_hyper(p, &locku->lu_offset); 775 p = xdr_decode_hyper(p, &locku->lu_length); 776 777 DECODE_TAIL; 778 } 779 780 static __be32 781 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 782 { 783 DECODE_HEAD; 784 785 READ_BUF(4); 786 lookup->lo_len = be32_to_cpup(p++); 787 READ_BUF(lookup->lo_len); 788 SAVEMEM(lookup->lo_name, lookup->lo_len); 789 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 790 return status; 791 792 DECODE_TAIL; 793 } 794 795 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 796 { 797 __be32 *p; 798 u32 w; 799 800 READ_BUF(4); 801 w = be32_to_cpup(p++); 802 *share_access = w & NFS4_SHARE_ACCESS_MASK; 803 *deleg_want = w & NFS4_SHARE_WANT_MASK; 804 if (deleg_when) 805 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 806 807 switch (w & NFS4_SHARE_ACCESS_MASK) { 808 case NFS4_SHARE_ACCESS_READ: 809 case NFS4_SHARE_ACCESS_WRITE: 810 case NFS4_SHARE_ACCESS_BOTH: 811 break; 812 default: 813 return nfserr_bad_xdr; 814 } 815 w &= ~NFS4_SHARE_ACCESS_MASK; 816 if (!w) 817 return nfs_ok; 818 if (!argp->minorversion) 819 return nfserr_bad_xdr; 820 switch (w & NFS4_SHARE_WANT_MASK) { 821 case NFS4_SHARE_WANT_NO_PREFERENCE: 822 case NFS4_SHARE_WANT_READ_DELEG: 823 case NFS4_SHARE_WANT_WRITE_DELEG: 824 case NFS4_SHARE_WANT_ANY_DELEG: 825 case NFS4_SHARE_WANT_NO_DELEG: 826 case NFS4_SHARE_WANT_CANCEL: 827 break; 828 default: 829 return nfserr_bad_xdr; 830 } 831 w &= ~NFS4_SHARE_WANT_MASK; 832 if (!w) 833 return nfs_ok; 834 835 if (!deleg_when) /* open_downgrade */ 836 return nfserr_inval; 837 switch (w) { 838 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 839 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 840 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 841 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 842 return nfs_ok; 843 } 844 xdr_error: 845 return nfserr_bad_xdr; 846 } 847 848 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 849 { 850 __be32 *p; 851 852 READ_BUF(4); 853 *x = be32_to_cpup(p++); 854 /* Note: unlinke access bits, deny bits may be zero. */ 855 if (*x & ~NFS4_SHARE_DENY_BOTH) 856 return nfserr_bad_xdr; 857 return nfs_ok; 858 xdr_error: 859 return nfserr_bad_xdr; 860 } 861 862 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 863 { 864 __be32 *p; 865 866 READ_BUF(4); 867 o->len = be32_to_cpup(p++); 868 869 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 870 return nfserr_bad_xdr; 871 872 READ_BUF(o->len); 873 SAVEMEM(o->data, o->len); 874 return nfs_ok; 875 xdr_error: 876 return nfserr_bad_xdr; 877 } 878 879 static __be32 880 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 881 { 882 DECODE_HEAD; 883 u32 dummy; 884 885 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 886 open->op_iattr.ia_valid = 0; 887 open->op_openowner = NULL; 888 889 open->op_xdr_error = 0; 890 /* seqid, share_access, share_deny, clientid, ownerlen */ 891 READ_BUF(4); 892 open->op_seqid = be32_to_cpup(p++); 893 /* decode, yet ignore deleg_when until supported */ 894 status = nfsd4_decode_share_access(argp, &open->op_share_access, 895 &open->op_deleg_want, &dummy); 896 if (status) 897 goto xdr_error; 898 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 899 if (status) 900 goto xdr_error; 901 READ_BUF(sizeof(clientid_t)); 902 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 903 status = nfsd4_decode_opaque(argp, &open->op_owner); 904 if (status) 905 goto xdr_error; 906 READ_BUF(4); 907 open->op_create = be32_to_cpup(p++); 908 switch (open->op_create) { 909 case NFS4_OPEN_NOCREATE: 910 break; 911 case NFS4_OPEN_CREATE: 912 current->fs->umask = 0; 913 READ_BUF(4); 914 open->op_createmode = be32_to_cpup(p++); 915 switch (open->op_createmode) { 916 case NFS4_CREATE_UNCHECKED: 917 case NFS4_CREATE_GUARDED: 918 status = nfsd4_decode_fattr(argp, open->op_bmval, 919 &open->op_iattr, &open->op_acl, &open->op_label, 920 ¤t->fs->umask); 921 if (status) 922 goto out; 923 break; 924 case NFS4_CREATE_EXCLUSIVE: 925 READ_BUF(NFS4_VERIFIER_SIZE); 926 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 927 break; 928 case NFS4_CREATE_EXCLUSIVE4_1: 929 if (argp->minorversion < 1) 930 goto xdr_error; 931 READ_BUF(NFS4_VERIFIER_SIZE); 932 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 933 status = nfsd4_decode_fattr(argp, open->op_bmval, 934 &open->op_iattr, &open->op_acl, &open->op_label, 935 ¤t->fs->umask); 936 if (status) 937 goto out; 938 break; 939 default: 940 goto xdr_error; 941 } 942 break; 943 default: 944 goto xdr_error; 945 } 946 947 /* open_claim */ 948 READ_BUF(4); 949 open->op_claim_type = be32_to_cpup(p++); 950 switch (open->op_claim_type) { 951 case NFS4_OPEN_CLAIM_NULL: 952 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 953 READ_BUF(4); 954 open->op_fname.len = be32_to_cpup(p++); 955 READ_BUF(open->op_fname.len); 956 SAVEMEM(open->op_fname.data, open->op_fname.len); 957 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 958 return status; 959 break; 960 case NFS4_OPEN_CLAIM_PREVIOUS: 961 READ_BUF(4); 962 open->op_delegate_type = be32_to_cpup(p++); 963 break; 964 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 965 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 966 if (status) 967 return status; 968 READ_BUF(4); 969 open->op_fname.len = be32_to_cpup(p++); 970 READ_BUF(open->op_fname.len); 971 SAVEMEM(open->op_fname.data, open->op_fname.len); 972 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 973 return status; 974 break; 975 case NFS4_OPEN_CLAIM_FH: 976 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 977 if (argp->minorversion < 1) 978 goto xdr_error; 979 /* void */ 980 break; 981 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 982 if (argp->minorversion < 1) 983 goto xdr_error; 984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 985 if (status) 986 return status; 987 break; 988 default: 989 goto xdr_error; 990 } 991 992 DECODE_TAIL; 993 } 994 995 static __be32 996 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 997 { 998 DECODE_HEAD; 999 1000 if (argp->minorversion >= 1) 1001 return nfserr_notsupp; 1002 1003 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 1004 if (status) 1005 return status; 1006 READ_BUF(4); 1007 open_conf->oc_seqid = be32_to_cpup(p++); 1008 1009 DECODE_TAIL; 1010 } 1011 1012 static __be32 1013 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 1014 { 1015 DECODE_HEAD; 1016 1017 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 1018 if (status) 1019 return status; 1020 READ_BUF(4); 1021 open_down->od_seqid = be32_to_cpup(p++); 1022 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 1023 &open_down->od_deleg_want, NULL); 1024 if (status) 1025 return status; 1026 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 1027 if (status) 1028 return status; 1029 DECODE_TAIL; 1030 } 1031 1032 static __be32 1033 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 1034 { 1035 DECODE_HEAD; 1036 1037 READ_BUF(4); 1038 putfh->pf_fhlen = be32_to_cpup(p++); 1039 if (putfh->pf_fhlen > NFS4_FHSIZE) 1040 goto xdr_error; 1041 READ_BUF(putfh->pf_fhlen); 1042 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 1043 1044 DECODE_TAIL; 1045 } 1046 1047 static __be32 1048 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) 1049 { 1050 if (argp->minorversion == 0) 1051 return nfs_ok; 1052 return nfserr_notsupp; 1053 } 1054 1055 static __be32 1056 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 1057 { 1058 DECODE_HEAD; 1059 1060 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 1061 if (status) 1062 return status; 1063 READ_BUF(12); 1064 p = xdr_decode_hyper(p, &read->rd_offset); 1065 read->rd_length = be32_to_cpup(p++); 1066 1067 DECODE_TAIL; 1068 } 1069 1070 static __be32 1071 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 1072 { 1073 DECODE_HEAD; 1074 1075 READ_BUF(24); 1076 p = xdr_decode_hyper(p, &readdir->rd_cookie); 1077 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 1078 readdir->rd_dircount = be32_to_cpup(p++); 1079 readdir->rd_maxcount = be32_to_cpup(p++); 1080 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 1081 goto out; 1082 1083 DECODE_TAIL; 1084 } 1085 1086 static __be32 1087 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 1088 { 1089 DECODE_HEAD; 1090 1091 READ_BUF(4); 1092 remove->rm_namelen = be32_to_cpup(p++); 1093 READ_BUF(remove->rm_namelen); 1094 SAVEMEM(remove->rm_name, remove->rm_namelen); 1095 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 1096 return status; 1097 1098 DECODE_TAIL; 1099 } 1100 1101 static __be32 1102 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 1103 { 1104 DECODE_HEAD; 1105 1106 READ_BUF(4); 1107 rename->rn_snamelen = be32_to_cpup(p++); 1108 READ_BUF(rename->rn_snamelen); 1109 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1110 READ_BUF(4); 1111 rename->rn_tnamelen = be32_to_cpup(p++); 1112 READ_BUF(rename->rn_tnamelen); 1113 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1114 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1115 return status; 1116 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1117 return status; 1118 1119 DECODE_TAIL; 1120 } 1121 1122 static __be32 1123 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1124 { 1125 DECODE_HEAD; 1126 1127 if (argp->minorversion >= 1) 1128 return nfserr_notsupp; 1129 1130 READ_BUF(sizeof(clientid_t)); 1131 COPYMEM(clientid, sizeof(clientid_t)); 1132 1133 DECODE_TAIL; 1134 } 1135 1136 static __be32 1137 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1138 struct nfsd4_secinfo *secinfo) 1139 { 1140 DECODE_HEAD; 1141 1142 READ_BUF(4); 1143 secinfo->si_namelen = be32_to_cpup(p++); 1144 READ_BUF(secinfo->si_namelen); 1145 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1146 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1147 if (status) 1148 return status; 1149 DECODE_TAIL; 1150 } 1151 1152 static __be32 1153 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1154 struct nfsd4_secinfo_no_name *sin) 1155 { 1156 DECODE_HEAD; 1157 1158 READ_BUF(4); 1159 sin->sin_style = be32_to_cpup(p++); 1160 DECODE_TAIL; 1161 } 1162 1163 static __be32 1164 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1165 { 1166 __be32 status; 1167 1168 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1169 if (status) 1170 return status; 1171 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1172 &setattr->sa_acl, &setattr->sa_label, NULL); 1173 } 1174 1175 static __be32 1176 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1177 { 1178 DECODE_HEAD; 1179 1180 if (argp->minorversion >= 1) 1181 return nfserr_notsupp; 1182 1183 READ_BUF(NFS4_VERIFIER_SIZE); 1184 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1185 1186 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1187 if (status) 1188 return nfserr_bad_xdr; 1189 READ_BUF(8); 1190 setclientid->se_callback_prog = be32_to_cpup(p++); 1191 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1192 READ_BUF(setclientid->se_callback_netid_len); 1193 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1194 READ_BUF(4); 1195 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1196 1197 READ_BUF(setclientid->se_callback_addr_len); 1198 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1199 READ_BUF(4); 1200 setclientid->se_callback_ident = be32_to_cpup(p++); 1201 1202 DECODE_TAIL; 1203 } 1204 1205 static __be32 1206 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1207 { 1208 DECODE_HEAD; 1209 1210 if (argp->minorversion >= 1) 1211 return nfserr_notsupp; 1212 1213 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1214 COPYMEM(&scd_c->sc_clientid, 8); 1215 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1216 1217 DECODE_TAIL; 1218 } 1219 1220 /* Also used for NVERIFY */ 1221 static __be32 1222 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1223 { 1224 DECODE_HEAD; 1225 1226 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1227 goto out; 1228 1229 /* For convenience's sake, we compare raw xdr'd attributes in 1230 * nfsd4_proc_verify */ 1231 1232 READ_BUF(4); 1233 verify->ve_attrlen = be32_to_cpup(p++); 1234 READ_BUF(verify->ve_attrlen); 1235 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1236 1237 DECODE_TAIL; 1238 } 1239 1240 static __be32 1241 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1242 { 1243 int avail; 1244 int len; 1245 DECODE_HEAD; 1246 1247 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1248 if (status) 1249 return status; 1250 READ_BUF(16); 1251 p = xdr_decode_hyper(p, &write->wr_offset); 1252 write->wr_stable_how = be32_to_cpup(p++); 1253 if (write->wr_stable_how > 2) 1254 goto xdr_error; 1255 write->wr_buflen = be32_to_cpup(p++); 1256 1257 /* Sorry .. no magic macros for this.. * 1258 * READ_BUF(write->wr_buflen); 1259 * SAVEMEM(write->wr_buf, write->wr_buflen); 1260 */ 1261 avail = (char*)argp->end - (char*)argp->p; 1262 if (avail + argp->pagelen < write->wr_buflen) { 1263 dprintk("NFSD: xdr error (%s:%d)\n", 1264 __FILE__, __LINE__); 1265 goto xdr_error; 1266 } 1267 write->wr_head.iov_base = p; 1268 write->wr_head.iov_len = avail; 1269 write->wr_pagelist = argp->pagelist; 1270 1271 len = XDR_QUADLEN(write->wr_buflen) << 2; 1272 if (len >= avail) { 1273 int pages; 1274 1275 len -= avail; 1276 1277 pages = len >> PAGE_SHIFT; 1278 argp->pagelist += pages; 1279 argp->pagelen -= pages * PAGE_SIZE; 1280 len -= pages * PAGE_SIZE; 1281 1282 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1283 argp->pagelist++; 1284 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1285 } 1286 argp->p += XDR_QUADLEN(len); 1287 1288 DECODE_TAIL; 1289 } 1290 1291 static __be32 1292 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1293 { 1294 DECODE_HEAD; 1295 1296 if (argp->minorversion >= 1) 1297 return nfserr_notsupp; 1298 1299 READ_BUF(12); 1300 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1301 rlockowner->rl_owner.len = be32_to_cpup(p++); 1302 READ_BUF(rlockowner->rl_owner.len); 1303 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1304 1305 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1306 return nfserr_inval; 1307 DECODE_TAIL; 1308 } 1309 1310 static __be32 1311 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1312 struct nfsd4_exchange_id *exid) 1313 { 1314 int dummy, tmp; 1315 DECODE_HEAD; 1316 1317 READ_BUF(NFS4_VERIFIER_SIZE); 1318 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1319 1320 status = nfsd4_decode_opaque(argp, &exid->clname); 1321 if (status) 1322 return nfserr_bad_xdr; 1323 1324 READ_BUF(4); 1325 exid->flags = be32_to_cpup(p++); 1326 1327 /* Ignore state_protect4_a */ 1328 READ_BUF(4); 1329 exid->spa_how = be32_to_cpup(p++); 1330 switch (exid->spa_how) { 1331 case SP4_NONE: 1332 break; 1333 case SP4_MACH_CRED: 1334 /* spo_must_enforce */ 1335 status = nfsd4_decode_bitmap(argp, 1336 exid->spo_must_enforce); 1337 if (status) 1338 goto out; 1339 /* spo_must_allow */ 1340 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); 1341 if (status) 1342 goto out; 1343 break; 1344 case SP4_SSV: 1345 /* ssp_ops */ 1346 READ_BUF(4); 1347 dummy = be32_to_cpup(p++); 1348 READ_BUF(dummy * 4); 1349 p += dummy; 1350 1351 READ_BUF(4); 1352 dummy = be32_to_cpup(p++); 1353 READ_BUF(dummy * 4); 1354 p += dummy; 1355 1356 /* ssp_hash_algs<> */ 1357 READ_BUF(4); 1358 tmp = be32_to_cpup(p++); 1359 while (tmp--) { 1360 READ_BUF(4); 1361 dummy = be32_to_cpup(p++); 1362 READ_BUF(dummy); 1363 p += XDR_QUADLEN(dummy); 1364 } 1365 1366 /* ssp_encr_algs<> */ 1367 READ_BUF(4); 1368 tmp = be32_to_cpup(p++); 1369 while (tmp--) { 1370 READ_BUF(4); 1371 dummy = be32_to_cpup(p++); 1372 READ_BUF(dummy); 1373 p += XDR_QUADLEN(dummy); 1374 } 1375 1376 /* ssp_window and ssp_num_gss_handles */ 1377 READ_BUF(8); 1378 dummy = be32_to_cpup(p++); 1379 dummy = be32_to_cpup(p++); 1380 break; 1381 default: 1382 goto xdr_error; 1383 } 1384 1385 /* Ignore Implementation ID */ 1386 READ_BUF(4); /* nfs_impl_id4 array length */ 1387 dummy = be32_to_cpup(p++); 1388 1389 if (dummy > 1) 1390 goto xdr_error; 1391 1392 if (dummy == 1) { 1393 /* nii_domain */ 1394 READ_BUF(4); 1395 dummy = be32_to_cpup(p++); 1396 READ_BUF(dummy); 1397 p += XDR_QUADLEN(dummy); 1398 1399 /* nii_name */ 1400 READ_BUF(4); 1401 dummy = be32_to_cpup(p++); 1402 READ_BUF(dummy); 1403 p += XDR_QUADLEN(dummy); 1404 1405 /* nii_date */ 1406 READ_BUF(12); 1407 p += 3; 1408 } 1409 DECODE_TAIL; 1410 } 1411 1412 static __be32 1413 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1414 struct nfsd4_create_session *sess) 1415 { 1416 DECODE_HEAD; 1417 u32 dummy; 1418 1419 READ_BUF(16); 1420 COPYMEM(&sess->clientid, 8); 1421 sess->seqid = be32_to_cpup(p++); 1422 sess->flags = be32_to_cpup(p++); 1423 1424 /* Fore channel attrs */ 1425 READ_BUF(28); 1426 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1427 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1428 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1429 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1430 sess->fore_channel.maxops = be32_to_cpup(p++); 1431 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1432 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1433 if (sess->fore_channel.nr_rdma_attrs == 1) { 1434 READ_BUF(4); 1435 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1436 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1437 dprintk("Too many fore channel attr bitmaps!\n"); 1438 goto xdr_error; 1439 } 1440 1441 /* Back channel attrs */ 1442 READ_BUF(28); 1443 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1444 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1445 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1446 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1447 sess->back_channel.maxops = be32_to_cpup(p++); 1448 sess->back_channel.maxreqs = be32_to_cpup(p++); 1449 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1450 if (sess->back_channel.nr_rdma_attrs == 1) { 1451 READ_BUF(4); 1452 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1453 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1454 dprintk("Too many back channel attr bitmaps!\n"); 1455 goto xdr_error; 1456 } 1457 1458 READ_BUF(4); 1459 sess->callback_prog = be32_to_cpup(p++); 1460 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1461 DECODE_TAIL; 1462 } 1463 1464 static __be32 1465 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1466 struct nfsd4_destroy_session *destroy_session) 1467 { 1468 DECODE_HEAD; 1469 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1470 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1471 1472 DECODE_TAIL; 1473 } 1474 1475 static __be32 1476 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1477 struct nfsd4_free_stateid *free_stateid) 1478 { 1479 DECODE_HEAD; 1480 1481 READ_BUF(sizeof(stateid_t)); 1482 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1483 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1484 1485 DECODE_TAIL; 1486 } 1487 1488 static __be32 1489 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1490 struct nfsd4_sequence *seq) 1491 { 1492 DECODE_HEAD; 1493 1494 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1495 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1496 seq->seqid = be32_to_cpup(p++); 1497 seq->slotid = be32_to_cpup(p++); 1498 seq->maxslots = be32_to_cpup(p++); 1499 seq->cachethis = be32_to_cpup(p++); 1500 1501 DECODE_TAIL; 1502 } 1503 1504 static __be32 1505 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1506 { 1507 int i; 1508 __be32 *p, status; 1509 struct nfsd4_test_stateid_id *stateid; 1510 1511 READ_BUF(4); 1512 test_stateid->ts_num_ids = ntohl(*p++); 1513 1514 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1515 1516 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1517 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1518 if (!stateid) { 1519 status = nfserrno(-ENOMEM); 1520 goto out; 1521 } 1522 1523 INIT_LIST_HEAD(&stateid->ts_id_list); 1524 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1525 1526 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1527 if (status) 1528 goto out; 1529 } 1530 1531 status = 0; 1532 out: 1533 return status; 1534 xdr_error: 1535 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1536 status = nfserr_bad_xdr; 1537 goto out; 1538 } 1539 1540 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1541 { 1542 DECODE_HEAD; 1543 1544 READ_BUF(8); 1545 COPYMEM(&dc->clientid, 8); 1546 1547 DECODE_TAIL; 1548 } 1549 1550 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1551 { 1552 DECODE_HEAD; 1553 1554 READ_BUF(4); 1555 rc->rca_one_fs = be32_to_cpup(p++); 1556 1557 DECODE_TAIL; 1558 } 1559 1560 #ifdef CONFIG_NFSD_PNFS 1561 static __be32 1562 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1563 struct nfsd4_getdeviceinfo *gdev) 1564 { 1565 DECODE_HEAD; 1566 u32 num, i; 1567 1568 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1569 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1570 gdev->gd_layout_type = be32_to_cpup(p++); 1571 gdev->gd_maxcount = be32_to_cpup(p++); 1572 num = be32_to_cpup(p++); 1573 if (num) { 1574 READ_BUF(4 * num); 1575 gdev->gd_notify_types = be32_to_cpup(p++); 1576 for (i = 1; i < num; i++) { 1577 if (be32_to_cpup(p++)) { 1578 status = nfserr_inval; 1579 goto out; 1580 } 1581 } 1582 } 1583 DECODE_TAIL; 1584 } 1585 1586 static __be32 1587 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1588 struct nfsd4_layoutget *lgp) 1589 { 1590 DECODE_HEAD; 1591 1592 READ_BUF(36); 1593 lgp->lg_signal = be32_to_cpup(p++); 1594 lgp->lg_layout_type = be32_to_cpup(p++); 1595 lgp->lg_seg.iomode = be32_to_cpup(p++); 1596 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1597 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1598 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1599 1600 status = nfsd4_decode_stateid(argp, &lgp->lg_sid); 1601 if (status) 1602 return status; 1603 1604 READ_BUF(4); 1605 lgp->lg_maxcount = be32_to_cpup(p++); 1606 1607 DECODE_TAIL; 1608 } 1609 1610 static __be32 1611 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1612 struct nfsd4_layoutcommit *lcp) 1613 { 1614 DECODE_HEAD; 1615 u32 timechange; 1616 1617 READ_BUF(20); 1618 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1619 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1620 lcp->lc_reclaim = be32_to_cpup(p++); 1621 1622 status = nfsd4_decode_stateid(argp, &lcp->lc_sid); 1623 if (status) 1624 return status; 1625 1626 READ_BUF(4); 1627 lcp->lc_newoffset = be32_to_cpup(p++); 1628 if (lcp->lc_newoffset) { 1629 READ_BUF(8); 1630 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1631 } else 1632 lcp->lc_last_wr = 0; 1633 READ_BUF(4); 1634 timechange = be32_to_cpup(p++); 1635 if (timechange) { 1636 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1637 if (status) 1638 return status; 1639 } else { 1640 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1641 } 1642 READ_BUF(8); 1643 lcp->lc_layout_type = be32_to_cpup(p++); 1644 1645 /* 1646 * Save the layout update in XDR format and let the layout driver deal 1647 * with it later. 1648 */ 1649 lcp->lc_up_len = be32_to_cpup(p++); 1650 if (lcp->lc_up_len > 0) { 1651 READ_BUF(lcp->lc_up_len); 1652 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1653 } 1654 1655 DECODE_TAIL; 1656 } 1657 1658 static __be32 1659 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1660 struct nfsd4_layoutreturn *lrp) 1661 { 1662 DECODE_HEAD; 1663 1664 READ_BUF(16); 1665 lrp->lr_reclaim = be32_to_cpup(p++); 1666 lrp->lr_layout_type = be32_to_cpup(p++); 1667 lrp->lr_seg.iomode = be32_to_cpup(p++); 1668 lrp->lr_return_type = be32_to_cpup(p++); 1669 if (lrp->lr_return_type == RETURN_FILE) { 1670 READ_BUF(16); 1671 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1672 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1673 1674 status = nfsd4_decode_stateid(argp, &lrp->lr_sid); 1675 if (status) 1676 return status; 1677 1678 READ_BUF(4); 1679 lrp->lrf_body_len = be32_to_cpup(p++); 1680 if (lrp->lrf_body_len > 0) { 1681 READ_BUF(lrp->lrf_body_len); 1682 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1683 } 1684 } else { 1685 lrp->lr_seg.offset = 0; 1686 lrp->lr_seg.length = NFS4_MAX_UINT64; 1687 } 1688 1689 DECODE_TAIL; 1690 } 1691 #endif /* CONFIG_NFSD_PNFS */ 1692 1693 static __be32 1694 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1695 struct nfsd4_fallocate *fallocate) 1696 { 1697 DECODE_HEAD; 1698 1699 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1700 if (status) 1701 return status; 1702 1703 READ_BUF(16); 1704 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1705 xdr_decode_hyper(p, &fallocate->falloc_length); 1706 1707 DECODE_TAIL; 1708 } 1709 1710 static __be32 1711 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) 1712 { 1713 DECODE_HEAD; 1714 1715 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); 1716 if (status) 1717 return status; 1718 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); 1719 if (status) 1720 return status; 1721 1722 READ_BUF(8 + 8 + 8); 1723 p = xdr_decode_hyper(p, &clone->cl_src_pos); 1724 p = xdr_decode_hyper(p, &clone->cl_dst_pos); 1725 p = xdr_decode_hyper(p, &clone->cl_count); 1726 DECODE_TAIL; 1727 } 1728 1729 static __be32 1730 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) 1731 { 1732 DECODE_HEAD; 1733 unsigned int tmp; 1734 1735 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); 1736 if (status) 1737 return status; 1738 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); 1739 if (status) 1740 return status; 1741 1742 READ_BUF(8 + 8 + 8 + 4 + 4 + 4); 1743 p = xdr_decode_hyper(p, ©->cp_src_pos); 1744 p = xdr_decode_hyper(p, ©->cp_dst_pos); 1745 p = xdr_decode_hyper(p, ©->cp_count); 1746 copy->cp_consecutive = be32_to_cpup(p++); 1747 copy->cp_synchronous = be32_to_cpup(p++); 1748 tmp = be32_to_cpup(p); /* Source server list not supported */ 1749 1750 DECODE_TAIL; 1751 } 1752 1753 static __be32 1754 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1755 { 1756 DECODE_HEAD; 1757 1758 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1759 if (status) 1760 return status; 1761 1762 READ_BUF(8 + 4); 1763 p = xdr_decode_hyper(p, &seek->seek_offset); 1764 seek->seek_whence = be32_to_cpup(p); 1765 1766 DECODE_TAIL; 1767 } 1768 1769 static __be32 1770 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1771 { 1772 return nfs_ok; 1773 } 1774 1775 static __be32 1776 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1777 { 1778 return nfserr_notsupp; 1779 } 1780 1781 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1782 1783 static nfsd4_dec nfsd4_dec_ops[] = { 1784 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1785 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1786 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1787 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1788 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1789 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1790 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1791 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1792 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1793 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1794 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1795 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1796 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1797 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1798 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1799 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1800 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1801 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1802 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1803 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1804 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1805 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1806 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1807 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1808 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1809 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1810 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1811 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1812 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1813 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1814 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1815 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1816 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1817 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1818 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1819 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1820 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1821 1822 /* new operations for NFSv4.1 */ 1823 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1824 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1825 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1826 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1827 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1828 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1829 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1830 #ifdef CONFIG_NFSD_PNFS 1831 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1832 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1833 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1834 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1835 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1836 #else 1837 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1838 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1839 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1840 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1841 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1842 #endif 1843 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1844 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1845 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1846 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1847 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1848 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1849 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1850 1851 /* new operations for NFSv4.2 */ 1852 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1853 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, 1854 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1855 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1856 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1857 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1858 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1859 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1860 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1861 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1862 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1863 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1864 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, 1865 }; 1866 1867 static inline bool 1868 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1869 { 1870 if (op->opnum < FIRST_NFS4_OP) 1871 return false; 1872 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1873 return false; 1874 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1875 return false; 1876 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1877 return false; 1878 return true; 1879 } 1880 1881 static __be32 1882 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1883 { 1884 DECODE_HEAD; 1885 struct nfsd4_op *op; 1886 bool cachethis = false; 1887 int auth_slack= argp->rqstp->rq_auth_slack; 1888 int max_reply = auth_slack + 8; /* opcnt, status */ 1889 int readcount = 0; 1890 int readbytes = 0; 1891 int i; 1892 1893 READ_BUF(4); 1894 argp->taglen = be32_to_cpup(p++); 1895 READ_BUF(argp->taglen); 1896 SAVEMEM(argp->tag, argp->taglen); 1897 READ_BUF(8); 1898 argp->minorversion = be32_to_cpup(p++); 1899 argp->opcnt = be32_to_cpup(p++); 1900 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1901 1902 if (argp->taglen > NFSD4_MAX_TAGLEN) 1903 goto xdr_error; 1904 if (argp->opcnt > 100) 1905 goto xdr_error; 1906 1907 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1908 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1909 if (!argp->ops) { 1910 argp->ops = argp->iops; 1911 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1912 goto xdr_error; 1913 } 1914 } 1915 1916 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1917 argp->opcnt = 0; 1918 1919 for (i = 0; i < argp->opcnt; i++) { 1920 op = &argp->ops[i]; 1921 op->replay = NULL; 1922 1923 READ_BUF(4); 1924 op->opnum = be32_to_cpup(p++); 1925 1926 if (nfsd4_opnum_in_range(argp, op)) 1927 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1928 else { 1929 op->opnum = OP_ILLEGAL; 1930 op->status = nfserr_op_illegal; 1931 } 1932 /* 1933 * We'll try to cache the result in the DRC if any one 1934 * op in the compound wants to be cached: 1935 */ 1936 cachethis |= nfsd4_cache_this_op(op); 1937 1938 if (op->opnum == OP_READ) { 1939 readcount++; 1940 readbytes += nfsd4_max_reply(argp->rqstp, op); 1941 } else 1942 max_reply += nfsd4_max_reply(argp->rqstp, op); 1943 /* 1944 * OP_LOCK may return a conflicting lock. (Special case 1945 * because it will just skip encoding this if it runs 1946 * out of xdr buffer space, and it is the only operation 1947 * that behaves this way.) 1948 */ 1949 if (op->opnum == OP_LOCK) 1950 max_reply += NFS4_OPAQUE_LIMIT; 1951 1952 if (op->status) { 1953 argp->opcnt = i+1; 1954 break; 1955 } 1956 } 1957 /* Sessions make the DRC unnecessary: */ 1958 if (argp->minorversion) 1959 cachethis = false; 1960 svc_reserve(argp->rqstp, max_reply + readbytes); 1961 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1962 1963 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1964 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1965 1966 DECODE_TAIL; 1967 } 1968 1969 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1970 { 1971 if (IS_I_VERSION(inode)) { 1972 p = xdr_encode_hyper(p, inode->i_version); 1973 } else { 1974 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1975 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1976 } 1977 return p; 1978 } 1979 1980 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1981 { 1982 *p++ = cpu_to_be32(c->atomic); 1983 if (c->change_supported) { 1984 p = xdr_encode_hyper(p, c->before_change); 1985 p = xdr_encode_hyper(p, c->after_change); 1986 } else { 1987 *p++ = cpu_to_be32(c->before_ctime_sec); 1988 *p++ = cpu_to_be32(c->before_ctime_nsec); 1989 *p++ = cpu_to_be32(c->after_ctime_sec); 1990 *p++ = cpu_to_be32(c->after_ctime_nsec); 1991 } 1992 return p; 1993 } 1994 1995 /* Encode as an array of strings the string given with components 1996 * separated @sep, escaped with esc_enter and esc_exit. 1997 */ 1998 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1999 char *components, char esc_enter, 2000 char esc_exit) 2001 { 2002 __be32 *p; 2003 __be32 pathlen; 2004 int pathlen_offset; 2005 int strlen, count=0; 2006 char *str, *end, *next; 2007 2008 dprintk("nfsd4_encode_components(%s)\n", components); 2009 2010 pathlen_offset = xdr->buf->len; 2011 p = xdr_reserve_space(xdr, 4); 2012 if (!p) 2013 return nfserr_resource; 2014 p++; /* We will fill this in with @count later */ 2015 2016 end = str = components; 2017 while (*end) { 2018 bool found_esc = false; 2019 2020 /* try to parse as esc_start, ..., esc_end, sep */ 2021 if (*str == esc_enter) { 2022 for (; *end && (*end != esc_exit); end++) 2023 /* find esc_exit or end of string */; 2024 next = end + 1; 2025 if (*end && (!*next || *next == sep)) { 2026 str++; 2027 found_esc = true; 2028 } 2029 } 2030 2031 if (!found_esc) 2032 for (; *end && (*end != sep); end++) 2033 /* find sep or end of string */; 2034 2035 strlen = end - str; 2036 if (strlen) { 2037 p = xdr_reserve_space(xdr, strlen + 4); 2038 if (!p) 2039 return nfserr_resource; 2040 p = xdr_encode_opaque(p, str, strlen); 2041 count++; 2042 } 2043 else 2044 end++; 2045 if (found_esc) 2046 end = next; 2047 2048 str = end; 2049 } 2050 pathlen = htonl(count); 2051 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 2052 return 0; 2053 } 2054 2055 /* Encode as an array of strings the string given with components 2056 * separated @sep. 2057 */ 2058 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2059 char *components) 2060 { 2061 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2062 } 2063 2064 /* 2065 * encode a location element of a fs_locations structure 2066 */ 2067 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2068 struct nfsd4_fs_location *location) 2069 { 2070 __be32 status; 2071 2072 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2073 '[', ']'); 2074 if (status) 2075 return status; 2076 status = nfsd4_encode_components(xdr, '/', location->path); 2077 if (status) 2078 return status; 2079 return 0; 2080 } 2081 2082 /* 2083 * Encode a path in RFC3530 'pathname4' format 2084 */ 2085 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2086 const struct path *root, 2087 const struct path *path) 2088 { 2089 struct path cur = *path; 2090 __be32 *p; 2091 struct dentry **components = NULL; 2092 unsigned int ncomponents = 0; 2093 __be32 err = nfserr_jukebox; 2094 2095 dprintk("nfsd4_encode_components("); 2096 2097 path_get(&cur); 2098 /* First walk the path up to the nfsd root, and store the 2099 * dentries/path components in an array. 2100 */ 2101 for (;;) { 2102 if (path_equal(&cur, root)) 2103 break; 2104 if (cur.dentry == cur.mnt->mnt_root) { 2105 if (follow_up(&cur)) 2106 continue; 2107 goto out_free; 2108 } 2109 if ((ncomponents & 15) == 0) { 2110 struct dentry **new; 2111 new = krealloc(components, 2112 sizeof(*new) * (ncomponents + 16), 2113 GFP_KERNEL); 2114 if (!new) 2115 goto out_free; 2116 components = new; 2117 } 2118 components[ncomponents++] = cur.dentry; 2119 cur.dentry = dget_parent(cur.dentry); 2120 } 2121 err = nfserr_resource; 2122 p = xdr_reserve_space(xdr, 4); 2123 if (!p) 2124 goto out_free; 2125 *p++ = cpu_to_be32(ncomponents); 2126 2127 while (ncomponents) { 2128 struct dentry *dentry = components[ncomponents - 1]; 2129 unsigned int len; 2130 2131 spin_lock(&dentry->d_lock); 2132 len = dentry->d_name.len; 2133 p = xdr_reserve_space(xdr, len + 4); 2134 if (!p) { 2135 spin_unlock(&dentry->d_lock); 2136 goto out_free; 2137 } 2138 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2139 dprintk("/%pd", dentry); 2140 spin_unlock(&dentry->d_lock); 2141 dput(dentry); 2142 ncomponents--; 2143 } 2144 2145 err = 0; 2146 out_free: 2147 dprintk(")\n"); 2148 while (ncomponents) 2149 dput(components[--ncomponents]); 2150 kfree(components); 2151 path_put(&cur); 2152 return err; 2153 } 2154 2155 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2156 struct svc_rqst *rqstp, const struct path *path) 2157 { 2158 struct svc_export *exp_ps; 2159 __be32 res; 2160 2161 exp_ps = rqst_find_fsidzero_export(rqstp); 2162 if (IS_ERR(exp_ps)) 2163 return nfserrno(PTR_ERR(exp_ps)); 2164 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2165 exp_put(exp_ps); 2166 return res; 2167 } 2168 2169 /* 2170 * encode a fs_locations structure 2171 */ 2172 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2173 struct svc_rqst *rqstp, struct svc_export *exp) 2174 { 2175 __be32 status; 2176 int i; 2177 __be32 *p; 2178 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2179 2180 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2181 if (status) 2182 return status; 2183 p = xdr_reserve_space(xdr, 4); 2184 if (!p) 2185 return nfserr_resource; 2186 *p++ = cpu_to_be32(fslocs->locations_count); 2187 for (i=0; i<fslocs->locations_count; i++) { 2188 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2189 if (status) 2190 return status; 2191 } 2192 return 0; 2193 } 2194 2195 static u32 nfs4_file_type(umode_t mode) 2196 { 2197 switch (mode & S_IFMT) { 2198 case S_IFIFO: return NF4FIFO; 2199 case S_IFCHR: return NF4CHR; 2200 case S_IFDIR: return NF4DIR; 2201 case S_IFBLK: return NF4BLK; 2202 case S_IFLNK: return NF4LNK; 2203 case S_IFREG: return NF4REG; 2204 case S_IFSOCK: return NF4SOCK; 2205 default: return NF4BAD; 2206 }; 2207 } 2208 2209 static inline __be32 2210 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2211 struct nfs4_ace *ace) 2212 { 2213 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2214 return nfs4_acl_write_who(xdr, ace->whotype); 2215 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2216 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2217 else 2218 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2219 } 2220 2221 static inline __be32 2222 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) 2223 { 2224 __be32 *p; 2225 unsigned long i = hweight_long(layout_types); 2226 2227 p = xdr_reserve_space(xdr, 4 + 4 * i); 2228 if (!p) 2229 return nfserr_resource; 2230 2231 *p++ = cpu_to_be32(i); 2232 2233 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) 2234 if (layout_types & (1 << i)) 2235 *p++ = cpu_to_be32(i); 2236 2237 return 0; 2238 } 2239 2240 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2241 FATTR4_WORD0_RDATTR_ERROR) 2242 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2243 #define WORD2_ABSENT_FS_ATTRS 0 2244 2245 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2246 static inline __be32 2247 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2248 void *context, int len) 2249 { 2250 __be32 *p; 2251 2252 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2253 if (!p) 2254 return nfserr_resource; 2255 2256 /* 2257 * For now we use a 0 here to indicate the null translation; in 2258 * the future we may place a call to translation code here. 2259 */ 2260 *p++ = cpu_to_be32(0); /* lfs */ 2261 *p++ = cpu_to_be32(0); /* pi */ 2262 p = xdr_encode_opaque(p, context, len); 2263 return 0; 2264 } 2265 #else 2266 static inline __be32 2267 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2268 void *context, int len) 2269 { return 0; } 2270 #endif 2271 2272 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2273 { 2274 /* As per referral draft: */ 2275 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2276 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2277 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2278 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2279 *rdattr_err = NFSERR_MOVED; 2280 else 2281 return nfserr_moved; 2282 } 2283 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2284 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2285 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2286 return 0; 2287 } 2288 2289 2290 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2291 { 2292 struct path path = exp->ex_path; 2293 int err; 2294 2295 path_get(&path); 2296 while (follow_up(&path)) { 2297 if (path.dentry != path.mnt->mnt_root) 2298 break; 2299 } 2300 err = vfs_getattr(&path, stat); 2301 path_put(&path); 2302 return err; 2303 } 2304 2305 static __be32 2306 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2307 { 2308 __be32 *p; 2309 2310 if (bmval2) { 2311 p = xdr_reserve_space(xdr, 16); 2312 if (!p) 2313 goto out_resource; 2314 *p++ = cpu_to_be32(3); 2315 *p++ = cpu_to_be32(bmval0); 2316 *p++ = cpu_to_be32(bmval1); 2317 *p++ = cpu_to_be32(bmval2); 2318 } else if (bmval1) { 2319 p = xdr_reserve_space(xdr, 12); 2320 if (!p) 2321 goto out_resource; 2322 *p++ = cpu_to_be32(2); 2323 *p++ = cpu_to_be32(bmval0); 2324 *p++ = cpu_to_be32(bmval1); 2325 } else { 2326 p = xdr_reserve_space(xdr, 8); 2327 if (!p) 2328 goto out_resource; 2329 *p++ = cpu_to_be32(1); 2330 *p++ = cpu_to_be32(bmval0); 2331 } 2332 2333 return 0; 2334 out_resource: 2335 return nfserr_resource; 2336 } 2337 2338 /* 2339 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2340 * ourselves. 2341 */ 2342 static __be32 2343 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2344 struct svc_export *exp, 2345 struct dentry *dentry, u32 *bmval, 2346 struct svc_rqst *rqstp, int ignore_crossmnt) 2347 { 2348 u32 bmval0 = bmval[0]; 2349 u32 bmval1 = bmval[1]; 2350 u32 bmval2 = bmval[2]; 2351 struct kstat stat; 2352 struct svc_fh *tempfh = NULL; 2353 struct kstatfs statfs; 2354 __be32 *p; 2355 int starting_len = xdr->buf->len; 2356 int attrlen_offset; 2357 __be32 attrlen; 2358 u32 dummy; 2359 u64 dummy64; 2360 u32 rdattr_err = 0; 2361 __be32 status; 2362 int err; 2363 struct nfs4_acl *acl = NULL; 2364 void *context = NULL; 2365 int contextlen; 2366 bool contextsupport = false; 2367 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2368 u32 minorversion = resp->cstate.minorversion; 2369 struct path path = { 2370 .mnt = exp->ex_path.mnt, 2371 .dentry = dentry, 2372 }; 2373 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2374 2375 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2376 BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); 2377 2378 if (exp->ex_fslocs.migrated) { 2379 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2380 if (status) 2381 goto out; 2382 } 2383 2384 err = vfs_getattr(&path, &stat); 2385 if (err) 2386 goto out_nfserr; 2387 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2388 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2389 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2390 FATTR4_WORD1_SPACE_TOTAL))) { 2391 err = vfs_statfs(&path, &statfs); 2392 if (err) 2393 goto out_nfserr; 2394 } 2395 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2396 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2397 status = nfserr_jukebox; 2398 if (!tempfh) 2399 goto out; 2400 fh_init(tempfh, NFS4_FHSIZE); 2401 status = fh_compose(tempfh, exp, dentry, NULL); 2402 if (status) 2403 goto out; 2404 fhp = tempfh; 2405 } 2406 if (bmval0 & FATTR4_WORD0_ACL) { 2407 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2408 if (err == -EOPNOTSUPP) 2409 bmval0 &= ~FATTR4_WORD0_ACL; 2410 else if (err == -EINVAL) { 2411 status = nfserr_attrnotsupp; 2412 goto out; 2413 } else if (err != 0) 2414 goto out_nfserr; 2415 } 2416 2417 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2418 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2419 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2420 err = security_inode_getsecctx(d_inode(dentry), 2421 &context, &contextlen); 2422 contextsupport = (err == 0); 2423 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2424 if (err == -EOPNOTSUPP) 2425 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2426 else if (err) 2427 goto out_nfserr; 2428 } 2429 } 2430 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2431 2432 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2433 if (status) 2434 goto out; 2435 2436 attrlen_offset = xdr->buf->len; 2437 p = xdr_reserve_space(xdr, 4); 2438 if (!p) 2439 goto out_resource; 2440 p++; /* to be backfilled later */ 2441 2442 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2443 u32 *supp = nfsd_suppattrs[minorversion]; 2444 2445 if (!IS_POSIXACL(dentry->d_inode)) 2446 supp[0] &= ~FATTR4_WORD0_ACL; 2447 if (!contextsupport) 2448 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2449 if (!supp[2]) { 2450 p = xdr_reserve_space(xdr, 12); 2451 if (!p) 2452 goto out_resource; 2453 *p++ = cpu_to_be32(2); 2454 *p++ = cpu_to_be32(supp[0]); 2455 *p++ = cpu_to_be32(supp[1]); 2456 } else { 2457 p = xdr_reserve_space(xdr, 16); 2458 if (!p) 2459 goto out_resource; 2460 *p++ = cpu_to_be32(3); 2461 *p++ = cpu_to_be32(supp[0]); 2462 *p++ = cpu_to_be32(supp[1]); 2463 *p++ = cpu_to_be32(supp[2]); 2464 } 2465 } 2466 if (bmval0 & FATTR4_WORD0_TYPE) { 2467 p = xdr_reserve_space(xdr, 4); 2468 if (!p) 2469 goto out_resource; 2470 dummy = nfs4_file_type(stat.mode); 2471 if (dummy == NF4BAD) { 2472 status = nfserr_serverfault; 2473 goto out; 2474 } 2475 *p++ = cpu_to_be32(dummy); 2476 } 2477 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2478 p = xdr_reserve_space(xdr, 4); 2479 if (!p) 2480 goto out_resource; 2481 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2482 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2483 else 2484 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2485 NFS4_FH_VOL_RENAME); 2486 } 2487 if (bmval0 & FATTR4_WORD0_CHANGE) { 2488 p = xdr_reserve_space(xdr, 8); 2489 if (!p) 2490 goto out_resource; 2491 p = encode_change(p, &stat, d_inode(dentry)); 2492 } 2493 if (bmval0 & FATTR4_WORD0_SIZE) { 2494 p = xdr_reserve_space(xdr, 8); 2495 if (!p) 2496 goto out_resource; 2497 p = xdr_encode_hyper(p, stat.size); 2498 } 2499 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2500 p = xdr_reserve_space(xdr, 4); 2501 if (!p) 2502 goto out_resource; 2503 *p++ = cpu_to_be32(1); 2504 } 2505 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2506 p = xdr_reserve_space(xdr, 4); 2507 if (!p) 2508 goto out_resource; 2509 *p++ = cpu_to_be32(1); 2510 } 2511 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2512 p = xdr_reserve_space(xdr, 4); 2513 if (!p) 2514 goto out_resource; 2515 *p++ = cpu_to_be32(0); 2516 } 2517 if (bmval0 & FATTR4_WORD0_FSID) { 2518 p = xdr_reserve_space(xdr, 16); 2519 if (!p) 2520 goto out_resource; 2521 if (exp->ex_fslocs.migrated) { 2522 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2523 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2524 } else switch(fsid_source(fhp)) { 2525 case FSIDSOURCE_FSID: 2526 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2527 p = xdr_encode_hyper(p, (u64)0); 2528 break; 2529 case FSIDSOURCE_DEV: 2530 *p++ = cpu_to_be32(0); 2531 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2532 *p++ = cpu_to_be32(0); 2533 *p++ = cpu_to_be32(MINOR(stat.dev)); 2534 break; 2535 case FSIDSOURCE_UUID: 2536 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2537 EX_UUID_LEN); 2538 break; 2539 } 2540 } 2541 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2542 p = xdr_reserve_space(xdr, 4); 2543 if (!p) 2544 goto out_resource; 2545 *p++ = cpu_to_be32(0); 2546 } 2547 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2548 p = xdr_reserve_space(xdr, 4); 2549 if (!p) 2550 goto out_resource; 2551 *p++ = cpu_to_be32(nn->nfsd4_lease); 2552 } 2553 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2554 p = xdr_reserve_space(xdr, 4); 2555 if (!p) 2556 goto out_resource; 2557 *p++ = cpu_to_be32(rdattr_err); 2558 } 2559 if (bmval0 & FATTR4_WORD0_ACL) { 2560 struct nfs4_ace *ace; 2561 2562 if (acl == NULL) { 2563 p = xdr_reserve_space(xdr, 4); 2564 if (!p) 2565 goto out_resource; 2566 2567 *p++ = cpu_to_be32(0); 2568 goto out_acl; 2569 } 2570 p = xdr_reserve_space(xdr, 4); 2571 if (!p) 2572 goto out_resource; 2573 *p++ = cpu_to_be32(acl->naces); 2574 2575 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2576 p = xdr_reserve_space(xdr, 4*3); 2577 if (!p) 2578 goto out_resource; 2579 *p++ = cpu_to_be32(ace->type); 2580 *p++ = cpu_to_be32(ace->flag); 2581 *p++ = cpu_to_be32(ace->access_mask & 2582 NFS4_ACE_MASK_ALL); 2583 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2584 if (status) 2585 goto out; 2586 } 2587 } 2588 out_acl: 2589 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2590 p = xdr_reserve_space(xdr, 4); 2591 if (!p) 2592 goto out_resource; 2593 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2594 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2595 } 2596 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2597 p = xdr_reserve_space(xdr, 4); 2598 if (!p) 2599 goto out_resource; 2600 *p++ = cpu_to_be32(1); 2601 } 2602 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2603 p = xdr_reserve_space(xdr, 4); 2604 if (!p) 2605 goto out_resource; 2606 *p++ = cpu_to_be32(0); 2607 } 2608 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2609 p = xdr_reserve_space(xdr, 4); 2610 if (!p) 2611 goto out_resource; 2612 *p++ = cpu_to_be32(1); 2613 } 2614 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2615 p = xdr_reserve_space(xdr, 4); 2616 if (!p) 2617 goto out_resource; 2618 *p++ = cpu_to_be32(1); 2619 } 2620 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2621 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2622 if (!p) 2623 goto out_resource; 2624 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2625 fhp->fh_handle.fh_size); 2626 } 2627 if (bmval0 & FATTR4_WORD0_FILEID) { 2628 p = xdr_reserve_space(xdr, 8); 2629 if (!p) 2630 goto out_resource; 2631 p = xdr_encode_hyper(p, stat.ino); 2632 } 2633 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2634 p = xdr_reserve_space(xdr, 8); 2635 if (!p) 2636 goto out_resource; 2637 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2638 } 2639 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2640 p = xdr_reserve_space(xdr, 8); 2641 if (!p) 2642 goto out_resource; 2643 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2644 } 2645 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2646 p = xdr_reserve_space(xdr, 8); 2647 if (!p) 2648 goto out_resource; 2649 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2650 } 2651 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2652 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2653 if (status) 2654 goto out; 2655 } 2656 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2657 p = xdr_reserve_space(xdr, 4); 2658 if (!p) 2659 goto out_resource; 2660 *p++ = cpu_to_be32(1); 2661 } 2662 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2663 p = xdr_reserve_space(xdr, 8); 2664 if (!p) 2665 goto out_resource; 2666 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2667 } 2668 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2669 p = xdr_reserve_space(xdr, 4); 2670 if (!p) 2671 goto out_resource; 2672 *p++ = cpu_to_be32(255); 2673 } 2674 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2675 p = xdr_reserve_space(xdr, 4); 2676 if (!p) 2677 goto out_resource; 2678 *p++ = cpu_to_be32(statfs.f_namelen); 2679 } 2680 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2681 p = xdr_reserve_space(xdr, 8); 2682 if (!p) 2683 goto out_resource; 2684 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2685 } 2686 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2687 p = xdr_reserve_space(xdr, 8); 2688 if (!p) 2689 goto out_resource; 2690 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2691 } 2692 if (bmval1 & FATTR4_WORD1_MODE) { 2693 p = xdr_reserve_space(xdr, 4); 2694 if (!p) 2695 goto out_resource; 2696 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2697 } 2698 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2699 p = xdr_reserve_space(xdr, 4); 2700 if (!p) 2701 goto out_resource; 2702 *p++ = cpu_to_be32(1); 2703 } 2704 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2705 p = xdr_reserve_space(xdr, 4); 2706 if (!p) 2707 goto out_resource; 2708 *p++ = cpu_to_be32(stat.nlink); 2709 } 2710 if (bmval1 & FATTR4_WORD1_OWNER) { 2711 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2712 if (status) 2713 goto out; 2714 } 2715 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2716 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2717 if (status) 2718 goto out; 2719 } 2720 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2721 p = xdr_reserve_space(xdr, 8); 2722 if (!p) 2723 goto out_resource; 2724 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2725 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2726 } 2727 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2728 p = xdr_reserve_space(xdr, 8); 2729 if (!p) 2730 goto out_resource; 2731 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2732 p = xdr_encode_hyper(p, dummy64); 2733 } 2734 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2735 p = xdr_reserve_space(xdr, 8); 2736 if (!p) 2737 goto out_resource; 2738 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2739 p = xdr_encode_hyper(p, dummy64); 2740 } 2741 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2742 p = xdr_reserve_space(xdr, 8); 2743 if (!p) 2744 goto out_resource; 2745 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2746 p = xdr_encode_hyper(p, dummy64); 2747 } 2748 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2749 p = xdr_reserve_space(xdr, 8); 2750 if (!p) 2751 goto out_resource; 2752 dummy64 = (u64)stat.blocks << 9; 2753 p = xdr_encode_hyper(p, dummy64); 2754 } 2755 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2756 p = xdr_reserve_space(xdr, 12); 2757 if (!p) 2758 goto out_resource; 2759 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2760 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2761 } 2762 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2763 p = xdr_reserve_space(xdr, 12); 2764 if (!p) 2765 goto out_resource; 2766 *p++ = cpu_to_be32(0); 2767 *p++ = cpu_to_be32(1); 2768 *p++ = cpu_to_be32(0); 2769 } 2770 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2771 p = xdr_reserve_space(xdr, 12); 2772 if (!p) 2773 goto out_resource; 2774 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2775 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2776 } 2777 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2778 p = xdr_reserve_space(xdr, 12); 2779 if (!p) 2780 goto out_resource; 2781 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2782 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2783 } 2784 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2785 struct kstat parent_stat; 2786 u64 ino = stat.ino; 2787 2788 p = xdr_reserve_space(xdr, 8); 2789 if (!p) 2790 goto out_resource; 2791 /* 2792 * Get parent's attributes if not ignoring crossmount 2793 * and this is the root of a cross-mounted filesystem. 2794 */ 2795 if (ignore_crossmnt == 0 && 2796 dentry == exp->ex_path.mnt->mnt_root) { 2797 err = get_parent_attributes(exp, &parent_stat); 2798 if (err) 2799 goto out_nfserr; 2800 ino = parent_stat.ino; 2801 } 2802 p = xdr_encode_hyper(p, ino); 2803 } 2804 #ifdef CONFIG_NFSD_PNFS 2805 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2806 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2807 if (status) 2808 goto out; 2809 } 2810 2811 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2812 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2813 if (status) 2814 goto out; 2815 } 2816 2817 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2818 p = xdr_reserve_space(xdr, 4); 2819 if (!p) 2820 goto out_resource; 2821 *p++ = cpu_to_be32(stat.blksize); 2822 } 2823 #endif /* CONFIG_NFSD_PNFS */ 2824 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2825 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0, 2826 NFSD_SUPPATTR_EXCLCREAT_WORD1, 2827 NFSD_SUPPATTR_EXCLCREAT_WORD2); 2828 if (status) 2829 goto out; 2830 } 2831 2832 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2833 status = nfsd4_encode_security_label(xdr, rqstp, context, 2834 contextlen); 2835 if (status) 2836 goto out; 2837 } 2838 2839 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2840 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2841 status = nfs_ok; 2842 2843 out: 2844 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2845 if (context) 2846 security_release_secctx(context, contextlen); 2847 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2848 kfree(acl); 2849 if (tempfh) { 2850 fh_put(tempfh); 2851 kfree(tempfh); 2852 } 2853 if (status) 2854 xdr_truncate_encode(xdr, starting_len); 2855 return status; 2856 out_nfserr: 2857 status = nfserrno(err); 2858 goto out; 2859 out_resource: 2860 status = nfserr_resource; 2861 goto out; 2862 } 2863 2864 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2865 struct xdr_buf *buf, __be32 *p, int bytes) 2866 { 2867 xdr->scratch.iov_len = 0; 2868 memset(buf, 0, sizeof(struct xdr_buf)); 2869 buf->head[0].iov_base = p; 2870 buf->head[0].iov_len = 0; 2871 buf->len = 0; 2872 xdr->buf = buf; 2873 xdr->iov = buf->head; 2874 xdr->p = p; 2875 xdr->end = (void *)p + bytes; 2876 buf->buflen = bytes; 2877 } 2878 2879 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2880 struct svc_fh *fhp, struct svc_export *exp, 2881 struct dentry *dentry, u32 *bmval, 2882 struct svc_rqst *rqstp, int ignore_crossmnt) 2883 { 2884 struct xdr_buf dummy; 2885 struct xdr_stream xdr; 2886 __be32 ret; 2887 2888 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2889 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2890 ignore_crossmnt); 2891 *p = xdr.p; 2892 return ret; 2893 } 2894 2895 static inline int attributes_need_mount(u32 *bmval) 2896 { 2897 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2898 return 1; 2899 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2900 return 1; 2901 return 0; 2902 } 2903 2904 static __be32 2905 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2906 const char *name, int namlen) 2907 { 2908 struct svc_export *exp = cd->rd_fhp->fh_export; 2909 struct dentry *dentry; 2910 __be32 nfserr; 2911 int ignore_crossmnt = 0; 2912 2913 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2914 if (IS_ERR(dentry)) 2915 return nfserrno(PTR_ERR(dentry)); 2916 if (d_really_is_negative(dentry)) { 2917 /* 2918 * we're not holding the i_mutex here, so there's 2919 * a window where this directory entry could have gone 2920 * away. 2921 */ 2922 dput(dentry); 2923 return nfserr_noent; 2924 } 2925 2926 exp_get(exp); 2927 /* 2928 * In the case of a mountpoint, the client may be asking for 2929 * attributes that are only properties of the underlying filesystem 2930 * as opposed to the cross-mounted file system. In such a case, 2931 * we will not follow the cross mount and will fill the attribtutes 2932 * directly from the mountpoint dentry. 2933 */ 2934 if (nfsd_mountpoint(dentry, exp)) { 2935 int err; 2936 2937 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2938 && !attributes_need_mount(cd->rd_bmval)) { 2939 ignore_crossmnt = 1; 2940 goto out_encode; 2941 } 2942 /* 2943 * Why the heck aren't we just using nfsd_lookup?? 2944 * Different "."/".." handling? Something else? 2945 * At least, add a comment here to explain.... 2946 */ 2947 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2948 if (err) { 2949 nfserr = nfserrno(err); 2950 goto out_put; 2951 } 2952 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2953 if (nfserr) 2954 goto out_put; 2955 2956 } 2957 out_encode: 2958 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2959 cd->rd_rqstp, ignore_crossmnt); 2960 out_put: 2961 dput(dentry); 2962 exp_put(exp); 2963 return nfserr; 2964 } 2965 2966 static __be32 * 2967 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2968 { 2969 __be32 *p; 2970 2971 p = xdr_reserve_space(xdr, 20); 2972 if (!p) 2973 return NULL; 2974 *p++ = htonl(2); 2975 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2976 *p++ = htonl(0); /* bmval1 */ 2977 2978 *p++ = htonl(4); /* attribute length */ 2979 *p++ = nfserr; /* no htonl */ 2980 return p; 2981 } 2982 2983 static int 2984 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2985 loff_t offset, u64 ino, unsigned int d_type) 2986 { 2987 struct readdir_cd *ccd = ccdv; 2988 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2989 struct xdr_stream *xdr = cd->xdr; 2990 int start_offset = xdr->buf->len; 2991 int cookie_offset; 2992 u32 name_and_cookie; 2993 int entry_bytes; 2994 __be32 nfserr = nfserr_toosmall; 2995 __be64 wire_offset; 2996 __be32 *p; 2997 2998 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2999 if (name && isdotent(name, namlen)) { 3000 cd->common.err = nfs_ok; 3001 return 0; 3002 } 3003 3004 if (cd->cookie_offset) { 3005 wire_offset = cpu_to_be64(offset); 3006 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 3007 &wire_offset, 8); 3008 } 3009 3010 p = xdr_reserve_space(xdr, 4); 3011 if (!p) 3012 goto fail; 3013 *p++ = xdr_one; /* mark entry present */ 3014 cookie_offset = xdr->buf->len; 3015 p = xdr_reserve_space(xdr, 3*4 + namlen); 3016 if (!p) 3017 goto fail; 3018 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 3019 p = xdr_encode_array(p, name, namlen); /* name length & name */ 3020 3021 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 3022 switch (nfserr) { 3023 case nfs_ok: 3024 break; 3025 case nfserr_resource: 3026 nfserr = nfserr_toosmall; 3027 goto fail; 3028 case nfserr_noent: 3029 xdr_truncate_encode(xdr, start_offset); 3030 goto skip_entry; 3031 default: 3032 /* 3033 * If the client requested the RDATTR_ERROR attribute, 3034 * we stuff the error code into this attribute 3035 * and continue. If this attribute was not requested, 3036 * then in accordance with the spec, we fail the 3037 * entire READDIR operation(!) 3038 */ 3039 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 3040 goto fail; 3041 p = nfsd4_encode_rdattr_error(xdr, nfserr); 3042 if (p == NULL) { 3043 nfserr = nfserr_toosmall; 3044 goto fail; 3045 } 3046 } 3047 nfserr = nfserr_toosmall; 3048 entry_bytes = xdr->buf->len - start_offset; 3049 if (entry_bytes > cd->rd_maxcount) 3050 goto fail; 3051 cd->rd_maxcount -= entry_bytes; 3052 /* 3053 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3054 * let's always let through the first entry, at least: 3055 */ 3056 if (!cd->rd_dircount) 3057 goto fail; 3058 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3059 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3060 goto fail; 3061 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3062 3063 cd->cookie_offset = cookie_offset; 3064 skip_entry: 3065 cd->common.err = nfs_ok; 3066 return 0; 3067 fail: 3068 xdr_truncate_encode(xdr, start_offset); 3069 cd->common.err = nfserr; 3070 return -EINVAL; 3071 } 3072 3073 static __be32 3074 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3075 { 3076 __be32 *p; 3077 3078 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3079 if (!p) 3080 return nfserr_resource; 3081 *p++ = cpu_to_be32(sid->si_generation); 3082 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3083 sizeof(stateid_opaque_t)); 3084 return 0; 3085 } 3086 3087 static __be32 3088 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3089 { 3090 struct xdr_stream *xdr = &resp->xdr; 3091 __be32 *p; 3092 3093 if (!nfserr) { 3094 p = xdr_reserve_space(xdr, 8); 3095 if (!p) 3096 return nfserr_resource; 3097 *p++ = cpu_to_be32(access->ac_supported); 3098 *p++ = cpu_to_be32(access->ac_resp_access); 3099 } 3100 return nfserr; 3101 } 3102 3103 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3104 { 3105 struct xdr_stream *xdr = &resp->xdr; 3106 __be32 *p; 3107 3108 if (!nfserr) { 3109 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3110 if (!p) 3111 return nfserr_resource; 3112 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3113 NFS4_MAX_SESSIONID_LEN); 3114 *p++ = cpu_to_be32(bcts->dir); 3115 /* Upshifting from TCP to RDMA is not supported */ 3116 *p++ = cpu_to_be32(0); 3117 } 3118 return nfserr; 3119 } 3120 3121 static __be32 3122 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3123 { 3124 struct xdr_stream *xdr = &resp->xdr; 3125 3126 if (!nfserr) 3127 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3128 3129 return nfserr; 3130 } 3131 3132 3133 static __be32 3134 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3135 { 3136 struct xdr_stream *xdr = &resp->xdr; 3137 __be32 *p; 3138 3139 if (!nfserr) { 3140 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3141 if (!p) 3142 return nfserr_resource; 3143 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3144 NFS4_VERIFIER_SIZE); 3145 } 3146 return nfserr; 3147 } 3148 3149 static __be32 3150 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3151 { 3152 struct xdr_stream *xdr = &resp->xdr; 3153 __be32 *p; 3154 3155 if (!nfserr) { 3156 p = xdr_reserve_space(xdr, 20); 3157 if (!p) 3158 return nfserr_resource; 3159 encode_cinfo(p, &create->cr_cinfo); 3160 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3161 create->cr_bmval[1], create->cr_bmval[2]); 3162 } 3163 return nfserr; 3164 } 3165 3166 static __be32 3167 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3168 { 3169 struct svc_fh *fhp = getattr->ga_fhp; 3170 struct xdr_stream *xdr = &resp->xdr; 3171 3172 if (nfserr) 3173 return nfserr; 3174 3175 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3176 getattr->ga_bmval, 3177 resp->rqstp, 0); 3178 return nfserr; 3179 } 3180 3181 static __be32 3182 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3183 { 3184 struct xdr_stream *xdr = &resp->xdr; 3185 struct svc_fh *fhp = *fhpp; 3186 unsigned int len; 3187 __be32 *p; 3188 3189 if (!nfserr) { 3190 len = fhp->fh_handle.fh_size; 3191 p = xdr_reserve_space(xdr, len + 4); 3192 if (!p) 3193 return nfserr_resource; 3194 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3195 } 3196 return nfserr; 3197 } 3198 3199 /* 3200 * Including all fields other than the name, a LOCK4denied structure requires 3201 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3202 */ 3203 static __be32 3204 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3205 { 3206 struct xdr_netobj *conf = &ld->ld_owner; 3207 __be32 *p; 3208 3209 again: 3210 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3211 if (!p) { 3212 /* 3213 * Don't fail to return the result just because we can't 3214 * return the conflicting open: 3215 */ 3216 if (conf->len) { 3217 kfree(conf->data); 3218 conf->len = 0; 3219 conf->data = NULL; 3220 goto again; 3221 } 3222 return nfserr_resource; 3223 } 3224 p = xdr_encode_hyper(p, ld->ld_start); 3225 p = xdr_encode_hyper(p, ld->ld_length); 3226 *p++ = cpu_to_be32(ld->ld_type); 3227 if (conf->len) { 3228 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3229 p = xdr_encode_opaque(p, conf->data, conf->len); 3230 kfree(conf->data); 3231 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3232 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3233 *p++ = cpu_to_be32(0); /* length of owner name */ 3234 } 3235 return nfserr_denied; 3236 } 3237 3238 static __be32 3239 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3240 { 3241 struct xdr_stream *xdr = &resp->xdr; 3242 3243 if (!nfserr) 3244 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3245 else if (nfserr == nfserr_denied) 3246 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3247 3248 return nfserr; 3249 } 3250 3251 static __be32 3252 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3253 { 3254 struct xdr_stream *xdr = &resp->xdr; 3255 3256 if (nfserr == nfserr_denied) 3257 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3258 return nfserr; 3259 } 3260 3261 static __be32 3262 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3263 { 3264 struct xdr_stream *xdr = &resp->xdr; 3265 3266 if (!nfserr) 3267 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3268 3269 return nfserr; 3270 } 3271 3272 3273 static __be32 3274 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3275 { 3276 struct xdr_stream *xdr = &resp->xdr; 3277 __be32 *p; 3278 3279 if (!nfserr) { 3280 p = xdr_reserve_space(xdr, 20); 3281 if (!p) 3282 return nfserr_resource; 3283 p = encode_cinfo(p, &link->li_cinfo); 3284 } 3285 return nfserr; 3286 } 3287 3288 3289 static __be32 3290 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3291 { 3292 struct xdr_stream *xdr = &resp->xdr; 3293 __be32 *p; 3294 3295 if (nfserr) 3296 goto out; 3297 3298 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3299 if (nfserr) 3300 goto out; 3301 p = xdr_reserve_space(xdr, 24); 3302 if (!p) 3303 return nfserr_resource; 3304 p = encode_cinfo(p, &open->op_cinfo); 3305 *p++ = cpu_to_be32(open->op_rflags); 3306 3307 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3308 open->op_bmval[2]); 3309 if (nfserr) 3310 goto out; 3311 3312 p = xdr_reserve_space(xdr, 4); 3313 if (!p) 3314 return nfserr_resource; 3315 3316 *p++ = cpu_to_be32(open->op_delegate_type); 3317 switch (open->op_delegate_type) { 3318 case NFS4_OPEN_DELEGATE_NONE: 3319 break; 3320 case NFS4_OPEN_DELEGATE_READ: 3321 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3322 if (nfserr) 3323 return nfserr; 3324 p = xdr_reserve_space(xdr, 20); 3325 if (!p) 3326 return nfserr_resource; 3327 *p++ = cpu_to_be32(open->op_recall); 3328 3329 /* 3330 * TODO: ACE's in delegations 3331 */ 3332 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3333 *p++ = cpu_to_be32(0); 3334 *p++ = cpu_to_be32(0); 3335 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3336 break; 3337 case NFS4_OPEN_DELEGATE_WRITE: 3338 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3339 if (nfserr) 3340 return nfserr; 3341 p = xdr_reserve_space(xdr, 32); 3342 if (!p) 3343 return nfserr_resource; 3344 *p++ = cpu_to_be32(0); 3345 3346 /* 3347 * TODO: space_limit's in delegations 3348 */ 3349 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3350 *p++ = cpu_to_be32(~(u32)0); 3351 *p++ = cpu_to_be32(~(u32)0); 3352 3353 /* 3354 * TODO: ACE's in delegations 3355 */ 3356 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3357 *p++ = cpu_to_be32(0); 3358 *p++ = cpu_to_be32(0); 3359 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3360 break; 3361 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3362 switch (open->op_why_no_deleg) { 3363 case WND4_CONTENTION: 3364 case WND4_RESOURCE: 3365 p = xdr_reserve_space(xdr, 8); 3366 if (!p) 3367 return nfserr_resource; 3368 *p++ = cpu_to_be32(open->op_why_no_deleg); 3369 /* deleg signaling not supported yet: */ 3370 *p++ = cpu_to_be32(0); 3371 break; 3372 default: 3373 p = xdr_reserve_space(xdr, 4); 3374 if (!p) 3375 return nfserr_resource; 3376 *p++ = cpu_to_be32(open->op_why_no_deleg); 3377 } 3378 break; 3379 default: 3380 BUG(); 3381 } 3382 /* XXX save filehandle here */ 3383 out: 3384 return nfserr; 3385 } 3386 3387 static __be32 3388 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3389 { 3390 struct xdr_stream *xdr = &resp->xdr; 3391 3392 if (!nfserr) 3393 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3394 3395 return nfserr; 3396 } 3397 3398 static __be32 3399 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3400 { 3401 struct xdr_stream *xdr = &resp->xdr; 3402 3403 if (!nfserr) 3404 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3405 3406 return nfserr; 3407 } 3408 3409 static __be32 nfsd4_encode_splice_read( 3410 struct nfsd4_compoundres *resp, 3411 struct nfsd4_read *read, 3412 struct file *file, unsigned long maxcount) 3413 { 3414 struct xdr_stream *xdr = &resp->xdr; 3415 struct xdr_buf *buf = xdr->buf; 3416 u32 eof; 3417 long len; 3418 int space_left; 3419 __be32 nfserr; 3420 __be32 *p = xdr->p - 2; 3421 3422 /* Make sure there will be room for padding if needed */ 3423 if (xdr->end - xdr->p < 1) 3424 return nfserr_resource; 3425 3426 len = maxcount; 3427 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3428 read->rd_offset, &maxcount); 3429 if (nfserr) { 3430 /* 3431 * nfsd_splice_actor may have already messed with the 3432 * page length; reset it so as not to confuse 3433 * xdr_truncate_encode: 3434 */ 3435 buf->page_len = 0; 3436 return nfserr; 3437 } 3438 3439 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3440 d_inode(read->rd_fhp->fh_dentry)->i_size); 3441 3442 *(p++) = htonl(eof); 3443 *(p++) = htonl(maxcount); 3444 3445 buf->page_len = maxcount; 3446 buf->len += maxcount; 3447 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3448 / PAGE_SIZE; 3449 3450 /* Use rest of head for padding and remaining ops: */ 3451 buf->tail[0].iov_base = xdr->p; 3452 buf->tail[0].iov_len = 0; 3453 xdr->iov = buf->tail; 3454 if (maxcount&3) { 3455 int pad = 4 - (maxcount&3); 3456 3457 *(xdr->p++) = 0; 3458 3459 buf->tail[0].iov_base += maxcount&3; 3460 buf->tail[0].iov_len = pad; 3461 buf->len += pad; 3462 } 3463 3464 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3465 buf->buflen - buf->len); 3466 buf->buflen = buf->len + space_left; 3467 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3468 3469 return 0; 3470 } 3471 3472 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3473 struct nfsd4_read *read, 3474 struct file *file, unsigned long maxcount) 3475 { 3476 struct xdr_stream *xdr = &resp->xdr; 3477 u32 eof; 3478 int v; 3479 int starting_len = xdr->buf->len - 8; 3480 long len; 3481 int thislen; 3482 __be32 nfserr; 3483 __be32 tmp; 3484 __be32 *p; 3485 u32 zzz = 0; 3486 int pad; 3487 3488 len = maxcount; 3489 v = 0; 3490 3491 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3492 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3493 WARN_ON_ONCE(!p); 3494 resp->rqstp->rq_vec[v].iov_base = p; 3495 resp->rqstp->rq_vec[v].iov_len = thislen; 3496 v++; 3497 len -= thislen; 3498 3499 while (len) { 3500 thislen = min_t(long, len, PAGE_SIZE); 3501 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3502 WARN_ON_ONCE(!p); 3503 resp->rqstp->rq_vec[v].iov_base = p; 3504 resp->rqstp->rq_vec[v].iov_len = thislen; 3505 v++; 3506 len -= thislen; 3507 } 3508 read->rd_vlen = v; 3509 3510 len = maxcount; 3511 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3512 read->rd_vlen, &maxcount); 3513 if (nfserr) 3514 return nfserr; 3515 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3516 3517 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3518 d_inode(read->rd_fhp->fh_dentry)->i_size); 3519 3520 tmp = htonl(eof); 3521 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3522 tmp = htonl(maxcount); 3523 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3524 3525 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3526 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3527 &zzz, pad); 3528 return 0; 3529 3530 } 3531 3532 static __be32 3533 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3534 struct nfsd4_read *read) 3535 { 3536 unsigned long maxcount; 3537 struct xdr_stream *xdr = &resp->xdr; 3538 struct file *file = read->rd_filp; 3539 int starting_len = xdr->buf->len; 3540 struct raparms *ra = NULL; 3541 __be32 *p; 3542 3543 if (nfserr) 3544 goto out; 3545 3546 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3547 if (!p) { 3548 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3549 nfserr = nfserr_resource; 3550 goto out; 3551 } 3552 if (resp->xdr.buf->page_len && 3553 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3554 WARN_ON_ONCE(1); 3555 nfserr = nfserr_resource; 3556 goto out; 3557 } 3558 xdr_commit_encode(xdr); 3559 3560 maxcount = svc_max_payload(resp->rqstp); 3561 maxcount = min_t(unsigned long, maxcount, 3562 (xdr->buf->buflen - xdr->buf->len)); 3563 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3564 3565 if (read->rd_tmp_file) 3566 ra = nfsd_init_raparms(file); 3567 3568 if (file->f_op->splice_read && 3569 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3570 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3571 else 3572 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3573 3574 if (ra) 3575 nfsd_put_raparams(file, ra); 3576 3577 if (nfserr) 3578 xdr_truncate_encode(xdr, starting_len); 3579 3580 out: 3581 if (file) 3582 fput(file); 3583 return nfserr; 3584 } 3585 3586 static __be32 3587 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3588 { 3589 int maxcount; 3590 __be32 wire_count; 3591 int zero = 0; 3592 struct xdr_stream *xdr = &resp->xdr; 3593 int length_offset = xdr->buf->len; 3594 __be32 *p; 3595 3596 if (nfserr) 3597 return nfserr; 3598 3599 p = xdr_reserve_space(xdr, 4); 3600 if (!p) 3601 return nfserr_resource; 3602 maxcount = PAGE_SIZE; 3603 3604 p = xdr_reserve_space(xdr, maxcount); 3605 if (!p) 3606 return nfserr_resource; 3607 /* 3608 * XXX: By default, vfs_readlink() will truncate symlinks if they 3609 * would overflow the buffer. Is this kosher in NFSv4? If not, one 3610 * easy fix is: if vfs_readlink() precisely fills the buffer, assume 3611 * that truncation occurred, and return NFS4ERR_RESOURCE. 3612 */ 3613 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3614 (char *)p, &maxcount); 3615 if (nfserr == nfserr_isdir) 3616 nfserr = nfserr_inval; 3617 if (nfserr) { 3618 xdr_truncate_encode(xdr, length_offset); 3619 return nfserr; 3620 } 3621 3622 wire_count = htonl(maxcount); 3623 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3624 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3625 if (maxcount & 3) 3626 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3627 &zero, 4 - (maxcount&3)); 3628 return 0; 3629 } 3630 3631 static __be32 3632 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3633 { 3634 int maxcount; 3635 int bytes_left; 3636 loff_t offset; 3637 __be64 wire_offset; 3638 struct xdr_stream *xdr = &resp->xdr; 3639 int starting_len = xdr->buf->len; 3640 __be32 *p; 3641 3642 if (nfserr) 3643 return nfserr; 3644 3645 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3646 if (!p) 3647 return nfserr_resource; 3648 3649 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3650 *p++ = cpu_to_be32(0); 3651 *p++ = cpu_to_be32(0); 3652 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3653 - (char *)resp->xdr.buf->head[0].iov_base; 3654 3655 /* 3656 * Number of bytes left for directory entries allowing for the 3657 * final 8 bytes of the readdir and a following failed op: 3658 */ 3659 bytes_left = xdr->buf->buflen - xdr->buf->len 3660 - COMPOUND_ERR_SLACK_SPACE - 8; 3661 if (bytes_left < 0) { 3662 nfserr = nfserr_resource; 3663 goto err_no_verf; 3664 } 3665 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3666 /* 3667 * Note the rfc defines rd_maxcount as the size of the 3668 * READDIR4resok structure, which includes the verifier above 3669 * and the 8 bytes encoded at the end of this function: 3670 */ 3671 if (maxcount < 16) { 3672 nfserr = nfserr_toosmall; 3673 goto err_no_verf; 3674 } 3675 maxcount = min_t(int, maxcount-16, bytes_left); 3676 3677 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3678 if (!readdir->rd_dircount) 3679 readdir->rd_dircount = INT_MAX; 3680 3681 readdir->xdr = xdr; 3682 readdir->rd_maxcount = maxcount; 3683 readdir->common.err = 0; 3684 readdir->cookie_offset = 0; 3685 3686 offset = readdir->rd_cookie; 3687 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3688 &offset, 3689 &readdir->common, nfsd4_encode_dirent); 3690 if (nfserr == nfs_ok && 3691 readdir->common.err == nfserr_toosmall && 3692 xdr->buf->len == starting_len + 8) { 3693 /* nothing encoded; which limit did we hit?: */ 3694 if (maxcount - 16 < bytes_left) 3695 /* It was the fault of rd_maxcount: */ 3696 nfserr = nfserr_toosmall; 3697 else 3698 /* We ran out of buffer space: */ 3699 nfserr = nfserr_resource; 3700 } 3701 if (nfserr) 3702 goto err_no_verf; 3703 3704 if (readdir->cookie_offset) { 3705 wire_offset = cpu_to_be64(offset); 3706 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3707 &wire_offset, 8); 3708 } 3709 3710 p = xdr_reserve_space(xdr, 8); 3711 if (!p) { 3712 WARN_ON_ONCE(1); 3713 goto err_no_verf; 3714 } 3715 *p++ = 0; /* no more entries */ 3716 *p++ = htonl(readdir->common.err == nfserr_eof); 3717 3718 return 0; 3719 err_no_verf: 3720 xdr_truncate_encode(xdr, starting_len); 3721 return nfserr; 3722 } 3723 3724 static __be32 3725 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3726 { 3727 struct xdr_stream *xdr = &resp->xdr; 3728 __be32 *p; 3729 3730 if (!nfserr) { 3731 p = xdr_reserve_space(xdr, 20); 3732 if (!p) 3733 return nfserr_resource; 3734 p = encode_cinfo(p, &remove->rm_cinfo); 3735 } 3736 return nfserr; 3737 } 3738 3739 static __be32 3740 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3741 { 3742 struct xdr_stream *xdr = &resp->xdr; 3743 __be32 *p; 3744 3745 if (!nfserr) { 3746 p = xdr_reserve_space(xdr, 40); 3747 if (!p) 3748 return nfserr_resource; 3749 p = encode_cinfo(p, &rename->rn_sinfo); 3750 p = encode_cinfo(p, &rename->rn_tinfo); 3751 } 3752 return nfserr; 3753 } 3754 3755 static __be32 3756 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3757 __be32 nfserr, struct svc_export *exp) 3758 { 3759 u32 i, nflavs, supported; 3760 struct exp_flavor_info *flavs; 3761 struct exp_flavor_info def_flavs[2]; 3762 __be32 *p, *flavorsp; 3763 static bool report = true; 3764 3765 if (nfserr) 3766 goto out; 3767 nfserr = nfserr_resource; 3768 if (exp->ex_nflavors) { 3769 flavs = exp->ex_flavors; 3770 nflavs = exp->ex_nflavors; 3771 } else { /* Handling of some defaults in absence of real secinfo: */ 3772 flavs = def_flavs; 3773 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3774 nflavs = 2; 3775 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3776 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3777 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3778 nflavs = 1; 3779 flavs[0].pseudoflavor 3780 = svcauth_gss_flavor(exp->ex_client); 3781 } else { 3782 nflavs = 1; 3783 flavs[0].pseudoflavor 3784 = exp->ex_client->flavour->flavour; 3785 } 3786 } 3787 3788 supported = 0; 3789 p = xdr_reserve_space(xdr, 4); 3790 if (!p) 3791 goto out; 3792 flavorsp = p++; /* to be backfilled later */ 3793 3794 for (i = 0; i < nflavs; i++) { 3795 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3796 struct rpcsec_gss_info info; 3797 3798 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3799 supported++; 3800 p = xdr_reserve_space(xdr, 4 + 4 + 3801 XDR_LEN(info.oid.len) + 4 + 4); 3802 if (!p) 3803 goto out; 3804 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3805 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3806 *p++ = cpu_to_be32(info.qop); 3807 *p++ = cpu_to_be32(info.service); 3808 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3809 supported++; 3810 p = xdr_reserve_space(xdr, 4); 3811 if (!p) 3812 goto out; 3813 *p++ = cpu_to_be32(pf); 3814 } else { 3815 if (report) 3816 pr_warn("NFS: SECINFO: security flavor %u " 3817 "is not supported\n", pf); 3818 } 3819 } 3820 3821 if (nflavs != supported) 3822 report = false; 3823 *flavorsp = htonl(supported); 3824 nfserr = 0; 3825 out: 3826 if (exp) 3827 exp_put(exp); 3828 return nfserr; 3829 } 3830 3831 static __be32 3832 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3833 struct nfsd4_secinfo *secinfo) 3834 { 3835 struct xdr_stream *xdr = &resp->xdr; 3836 3837 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3838 } 3839 3840 static __be32 3841 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3842 struct nfsd4_secinfo_no_name *secinfo) 3843 { 3844 struct xdr_stream *xdr = &resp->xdr; 3845 3846 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3847 } 3848 3849 /* 3850 * The SETATTR encode routine is special -- it always encodes a bitmap, 3851 * regardless of the error status. 3852 */ 3853 static __be32 3854 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3855 { 3856 struct xdr_stream *xdr = &resp->xdr; 3857 __be32 *p; 3858 3859 p = xdr_reserve_space(xdr, 16); 3860 if (!p) 3861 return nfserr_resource; 3862 if (nfserr) { 3863 *p++ = cpu_to_be32(3); 3864 *p++ = cpu_to_be32(0); 3865 *p++ = cpu_to_be32(0); 3866 *p++ = cpu_to_be32(0); 3867 } 3868 else { 3869 *p++ = cpu_to_be32(3); 3870 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3871 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3872 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3873 } 3874 return nfserr; 3875 } 3876 3877 static __be32 3878 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3879 { 3880 struct xdr_stream *xdr = &resp->xdr; 3881 __be32 *p; 3882 3883 if (!nfserr) { 3884 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3885 if (!p) 3886 return nfserr_resource; 3887 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3888 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3889 NFS4_VERIFIER_SIZE); 3890 } 3891 else if (nfserr == nfserr_clid_inuse) { 3892 p = xdr_reserve_space(xdr, 8); 3893 if (!p) 3894 return nfserr_resource; 3895 *p++ = cpu_to_be32(0); 3896 *p++ = cpu_to_be32(0); 3897 } 3898 return nfserr; 3899 } 3900 3901 static __be32 3902 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3903 { 3904 struct xdr_stream *xdr = &resp->xdr; 3905 __be32 *p; 3906 3907 if (!nfserr) { 3908 p = xdr_reserve_space(xdr, 16); 3909 if (!p) 3910 return nfserr_resource; 3911 *p++ = cpu_to_be32(write->wr_bytes_written); 3912 *p++ = cpu_to_be32(write->wr_how_written); 3913 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3914 NFS4_VERIFIER_SIZE); 3915 } 3916 return nfserr; 3917 } 3918 3919 static __be32 3920 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3921 struct nfsd4_exchange_id *exid) 3922 { 3923 struct xdr_stream *xdr = &resp->xdr; 3924 __be32 *p; 3925 char *major_id; 3926 char *server_scope; 3927 int major_id_sz; 3928 int server_scope_sz; 3929 int status = 0; 3930 uint64_t minor_id = 0; 3931 3932 if (nfserr) 3933 return nfserr; 3934 3935 major_id = utsname()->nodename; 3936 major_id_sz = strlen(major_id); 3937 server_scope = utsname()->nodename; 3938 server_scope_sz = strlen(server_scope); 3939 3940 p = xdr_reserve_space(xdr, 3941 8 /* eir_clientid */ + 3942 4 /* eir_sequenceid */ + 3943 4 /* eir_flags */ + 3944 4 /* spr_how */); 3945 if (!p) 3946 return nfserr_resource; 3947 3948 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3949 *p++ = cpu_to_be32(exid->seqid); 3950 *p++ = cpu_to_be32(exid->flags); 3951 3952 *p++ = cpu_to_be32(exid->spa_how); 3953 3954 switch (exid->spa_how) { 3955 case SP4_NONE: 3956 break; 3957 case SP4_MACH_CRED: 3958 /* spo_must_enforce bitmap: */ 3959 status = nfsd4_encode_bitmap(xdr, 3960 exid->spo_must_enforce[0], 3961 exid->spo_must_enforce[1], 3962 exid->spo_must_enforce[2]); 3963 if (status) 3964 goto out; 3965 /* spo_must_allow bitmap: */ 3966 status = nfsd4_encode_bitmap(xdr, 3967 exid->spo_must_allow[0], 3968 exid->spo_must_allow[1], 3969 exid->spo_must_allow[2]); 3970 if (status) 3971 goto out; 3972 break; 3973 default: 3974 WARN_ON_ONCE(1); 3975 } 3976 3977 p = xdr_reserve_space(xdr, 3978 8 /* so_minor_id */ + 3979 4 /* so_major_id.len */ + 3980 (XDR_QUADLEN(major_id_sz) * 4) + 3981 4 /* eir_server_scope.len */ + 3982 (XDR_QUADLEN(server_scope_sz) * 4) + 3983 4 /* eir_server_impl_id.count (0) */); 3984 if (!p) 3985 return nfserr_resource; 3986 3987 /* The server_owner struct */ 3988 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3989 /* major id */ 3990 p = xdr_encode_opaque(p, major_id, major_id_sz); 3991 3992 /* Server scope */ 3993 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3994 3995 /* Implementation id */ 3996 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3997 return 0; 3998 out: 3999 return status; 4000 } 4001 4002 static __be32 4003 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 4004 struct nfsd4_create_session *sess) 4005 { 4006 struct xdr_stream *xdr = &resp->xdr; 4007 __be32 *p; 4008 4009 if (nfserr) 4010 return nfserr; 4011 4012 p = xdr_reserve_space(xdr, 24); 4013 if (!p) 4014 return nfserr_resource; 4015 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 4016 NFS4_MAX_SESSIONID_LEN); 4017 *p++ = cpu_to_be32(sess->seqid); 4018 *p++ = cpu_to_be32(sess->flags); 4019 4020 p = xdr_reserve_space(xdr, 28); 4021 if (!p) 4022 return nfserr_resource; 4023 *p++ = cpu_to_be32(0); /* headerpadsz */ 4024 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 4025 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 4026 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 4027 *p++ = cpu_to_be32(sess->fore_channel.maxops); 4028 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 4029 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 4030 4031 if (sess->fore_channel.nr_rdma_attrs) { 4032 p = xdr_reserve_space(xdr, 4); 4033 if (!p) 4034 return nfserr_resource; 4035 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 4036 } 4037 4038 p = xdr_reserve_space(xdr, 28); 4039 if (!p) 4040 return nfserr_resource; 4041 *p++ = cpu_to_be32(0); /* headerpadsz */ 4042 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 4043 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 4044 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 4045 *p++ = cpu_to_be32(sess->back_channel.maxops); 4046 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 4047 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 4048 4049 if (sess->back_channel.nr_rdma_attrs) { 4050 p = xdr_reserve_space(xdr, 4); 4051 if (!p) 4052 return nfserr_resource; 4053 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4054 } 4055 return 0; 4056 } 4057 4058 static __be32 4059 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4060 struct nfsd4_sequence *seq) 4061 { 4062 struct xdr_stream *xdr = &resp->xdr; 4063 __be32 *p; 4064 4065 if (nfserr) 4066 return nfserr; 4067 4068 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4069 if (!p) 4070 return nfserr_resource; 4071 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4072 NFS4_MAX_SESSIONID_LEN); 4073 *p++ = cpu_to_be32(seq->seqid); 4074 *p++ = cpu_to_be32(seq->slotid); 4075 /* Note slotid's are numbered from zero: */ 4076 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4077 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4078 *p++ = cpu_to_be32(seq->status_flags); 4079 4080 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4081 return 0; 4082 } 4083 4084 static __be32 4085 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4086 struct nfsd4_test_stateid *test_stateid) 4087 { 4088 struct xdr_stream *xdr = &resp->xdr; 4089 struct nfsd4_test_stateid_id *stateid, *next; 4090 __be32 *p; 4091 4092 if (nfserr) 4093 return nfserr; 4094 4095 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4096 if (!p) 4097 return nfserr_resource; 4098 *p++ = htonl(test_stateid->ts_num_ids); 4099 4100 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4101 *p++ = stateid->ts_id_status; 4102 } 4103 4104 return nfserr; 4105 } 4106 4107 #ifdef CONFIG_NFSD_PNFS 4108 static __be32 4109 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4110 struct nfsd4_getdeviceinfo *gdev) 4111 { 4112 struct xdr_stream *xdr = &resp->xdr; 4113 const struct nfsd4_layout_ops *ops = 4114 nfsd4_layout_ops[gdev->gd_layout_type]; 4115 u32 starting_len = xdr->buf->len, needed_len; 4116 __be32 *p; 4117 4118 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr)); 4119 if (nfserr) 4120 goto out; 4121 4122 nfserr = nfserr_resource; 4123 p = xdr_reserve_space(xdr, 4); 4124 if (!p) 4125 goto out; 4126 4127 *p++ = cpu_to_be32(gdev->gd_layout_type); 4128 4129 /* If maxcount is 0 then just update notifications */ 4130 if (gdev->gd_maxcount != 0) { 4131 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4132 if (nfserr) { 4133 /* 4134 * We don't bother to burden the layout drivers with 4135 * enforcing gd_maxcount, just tell the client to 4136 * come back with a bigger buffer if it's not enough. 4137 */ 4138 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4139 goto toosmall; 4140 goto out; 4141 } 4142 } 4143 4144 nfserr = nfserr_resource; 4145 if (gdev->gd_notify_types) { 4146 p = xdr_reserve_space(xdr, 4 + 4); 4147 if (!p) 4148 goto out; 4149 *p++ = cpu_to_be32(1); /* bitmap length */ 4150 *p++ = cpu_to_be32(gdev->gd_notify_types); 4151 } else { 4152 p = xdr_reserve_space(xdr, 4); 4153 if (!p) 4154 goto out; 4155 *p++ = 0; 4156 } 4157 4158 nfserr = 0; 4159 out: 4160 kfree(gdev->gd_device); 4161 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4162 return nfserr; 4163 4164 toosmall: 4165 dprintk("%s: maxcount too small\n", __func__); 4166 needed_len = xdr->buf->len + 4 /* notifications */; 4167 xdr_truncate_encode(xdr, starting_len); 4168 p = xdr_reserve_space(xdr, 4); 4169 if (!p) { 4170 nfserr = nfserr_resource; 4171 } else { 4172 *p++ = cpu_to_be32(needed_len); 4173 nfserr = nfserr_toosmall; 4174 } 4175 goto out; 4176 } 4177 4178 static __be32 4179 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4180 struct nfsd4_layoutget *lgp) 4181 { 4182 struct xdr_stream *xdr = &resp->xdr; 4183 const struct nfsd4_layout_ops *ops = 4184 nfsd4_layout_ops[lgp->lg_layout_type]; 4185 __be32 *p; 4186 4187 dprintk("%s: err %d\n", __func__, nfserr); 4188 if (nfserr) 4189 goto out; 4190 4191 nfserr = nfserr_resource; 4192 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4193 if (!p) 4194 goto out; 4195 4196 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4197 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4198 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4199 sizeof(stateid_opaque_t)); 4200 4201 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4202 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4203 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4204 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4205 *p++ = cpu_to_be32(lgp->lg_layout_type); 4206 4207 nfserr = ops->encode_layoutget(xdr, lgp); 4208 out: 4209 kfree(lgp->lg_content); 4210 return nfserr; 4211 } 4212 4213 static __be32 4214 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4215 struct nfsd4_layoutcommit *lcp) 4216 { 4217 struct xdr_stream *xdr = &resp->xdr; 4218 __be32 *p; 4219 4220 if (nfserr) 4221 return nfserr; 4222 4223 p = xdr_reserve_space(xdr, 4); 4224 if (!p) 4225 return nfserr_resource; 4226 *p++ = cpu_to_be32(lcp->lc_size_chg); 4227 if (lcp->lc_size_chg) { 4228 p = xdr_reserve_space(xdr, 8); 4229 if (!p) 4230 return nfserr_resource; 4231 p = xdr_encode_hyper(p, lcp->lc_newsize); 4232 } 4233 4234 return nfs_ok; 4235 } 4236 4237 static __be32 4238 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4239 struct nfsd4_layoutreturn *lrp) 4240 { 4241 struct xdr_stream *xdr = &resp->xdr; 4242 __be32 *p; 4243 4244 if (nfserr) 4245 return nfserr; 4246 4247 p = xdr_reserve_space(xdr, 4); 4248 if (!p) 4249 return nfserr_resource; 4250 *p++ = cpu_to_be32(lrp->lrs_present); 4251 if (lrp->lrs_present) 4252 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4253 return nfs_ok; 4254 } 4255 #endif /* CONFIG_NFSD_PNFS */ 4256 4257 static __be32 4258 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write) 4259 { 4260 __be32 *p; 4261 4262 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); 4263 if (!p) 4264 return nfserr_resource; 4265 4266 *p++ = cpu_to_be32(0); 4267 p = xdr_encode_hyper(p, write->wr_bytes_written); 4268 *p++ = cpu_to_be32(write->wr_stable_how); 4269 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 4270 NFS4_VERIFIER_SIZE); 4271 return nfs_ok; 4272 } 4273 4274 static __be32 4275 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, 4276 struct nfsd4_copy *copy) 4277 { 4278 __be32 *p; 4279 4280 if (!nfserr) { 4281 nfserr = nfsd42_encode_write_res(resp, ©->cp_res); 4282 if (nfserr) 4283 return nfserr; 4284 4285 p = xdr_reserve_space(&resp->xdr, 4 + 4); 4286 *p++ = cpu_to_be32(copy->cp_consecutive); 4287 *p++ = cpu_to_be32(copy->cp_synchronous); 4288 } 4289 return nfserr; 4290 } 4291 4292 static __be32 4293 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4294 struct nfsd4_seek *seek) 4295 { 4296 __be32 *p; 4297 4298 if (nfserr) 4299 return nfserr; 4300 4301 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4302 *p++ = cpu_to_be32(seek->seek_eof); 4303 p = xdr_encode_hyper(p, seek->seek_pos); 4304 4305 return nfserr; 4306 } 4307 4308 static __be32 4309 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4310 { 4311 return nfserr; 4312 } 4313 4314 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4315 4316 /* 4317 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4318 * since we don't need to filter out obsolete ops as this is 4319 * done in the decoding phase. 4320 */ 4321 static nfsd4_enc nfsd4_enc_ops[] = { 4322 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4323 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4324 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4325 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4326 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4327 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4328 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4329 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4330 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4331 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4332 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4333 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4334 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4335 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4336 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4337 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4338 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4339 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4340 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4341 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4342 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4343 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4344 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4345 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4346 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4347 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4348 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4349 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4350 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4351 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4352 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4353 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4354 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4355 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4356 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4357 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4358 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4359 4360 /* NFSv4.1 operations */ 4361 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4362 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4363 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4364 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4365 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4366 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4367 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4368 #ifdef CONFIG_NFSD_PNFS 4369 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4370 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4371 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4372 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4373 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4374 #else 4375 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4376 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4377 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4378 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4379 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4380 #endif 4381 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4382 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4383 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4384 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4385 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4386 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4387 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4388 4389 /* NFSv4.2 operations */ 4390 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4391 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, 4392 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4393 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4394 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4395 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4396 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4397 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4398 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4399 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4400 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4401 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4402 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4403 }; 4404 4405 /* 4406 * Calculate whether we still have space to encode repsize bytes. 4407 * There are two considerations: 4408 * - For NFS versions >=4.1, the size of the reply must stay within 4409 * session limits 4410 * - For all NFS versions, we must stay within limited preallocated 4411 * buffer space. 4412 * 4413 * This is called before the operation is processed, so can only provide 4414 * an upper estimate. For some nonidempotent operations (such as 4415 * getattr), it's not necessarily a problem if that estimate is wrong, 4416 * as we can fail it after processing without significant side effects. 4417 */ 4418 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4419 { 4420 struct xdr_buf *buf = &resp->rqstp->rq_res; 4421 struct nfsd4_slot *slot = resp->cstate.slot; 4422 4423 if (buf->len + respsize <= buf->buflen) 4424 return nfs_ok; 4425 if (!nfsd4_has_session(&resp->cstate)) 4426 return nfserr_resource; 4427 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4428 WARN_ON_ONCE(1); 4429 return nfserr_rep_too_big_to_cache; 4430 } 4431 return nfserr_rep_too_big; 4432 } 4433 4434 void 4435 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4436 { 4437 struct xdr_stream *xdr = &resp->xdr; 4438 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4439 struct svc_rqst *rqstp = resp->rqstp; 4440 int post_err_offset; 4441 nfsd4_enc encoder; 4442 __be32 *p; 4443 4444 p = xdr_reserve_space(xdr, 8); 4445 if (!p) { 4446 WARN_ON_ONCE(1); 4447 return; 4448 } 4449 *p++ = cpu_to_be32(op->opnum); 4450 post_err_offset = xdr->buf->len; 4451 4452 if (op->opnum == OP_ILLEGAL) 4453 goto status; 4454 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4455 !nfsd4_enc_ops[op->opnum]); 4456 encoder = nfsd4_enc_ops[op->opnum]; 4457 op->status = encoder(resp, op->status, &op->u); 4458 xdr_commit_encode(xdr); 4459 4460 /* nfsd4_check_resp_size guarantees enough room for error status */ 4461 if (!op->status) { 4462 int space_needed = 0; 4463 if (!nfsd4_last_compound_op(rqstp)) 4464 space_needed = COMPOUND_ERR_SLACK_SPACE; 4465 op->status = nfsd4_check_resp_size(resp, space_needed); 4466 } 4467 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4468 struct nfsd4_slot *slot = resp->cstate.slot; 4469 4470 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4471 op->status = nfserr_rep_too_big_to_cache; 4472 else 4473 op->status = nfserr_rep_too_big; 4474 } 4475 if (op->status == nfserr_resource || 4476 op->status == nfserr_rep_too_big || 4477 op->status == nfserr_rep_too_big_to_cache) { 4478 /* 4479 * The operation may have already been encoded or 4480 * partially encoded. No op returns anything additional 4481 * in the case of one of these three errors, so we can 4482 * just truncate back to after the status. But it's a 4483 * bug if we had to do this on a non-idempotent op: 4484 */ 4485 warn_on_nonidempotent_op(op); 4486 xdr_truncate_encode(xdr, post_err_offset); 4487 } 4488 if (so) { 4489 int len = xdr->buf->len - post_err_offset; 4490 4491 so->so_replay.rp_status = op->status; 4492 so->so_replay.rp_buflen = len; 4493 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4494 so->so_replay.rp_buf, len); 4495 } 4496 status: 4497 /* Note that op->status is already in network byte order: */ 4498 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4499 } 4500 4501 /* 4502 * Encode the reply stored in the stateowner reply cache 4503 * 4504 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4505 * previously sent already encoded operation. 4506 */ 4507 void 4508 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4509 { 4510 __be32 *p; 4511 struct nfs4_replay *rp = op->replay; 4512 4513 BUG_ON(!rp); 4514 4515 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4516 if (!p) { 4517 WARN_ON_ONCE(1); 4518 return; 4519 } 4520 *p++ = cpu_to_be32(op->opnum); 4521 *p++ = rp->rp_status; /* already xdr'ed */ 4522 4523 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4524 } 4525 4526 int 4527 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4528 { 4529 return xdr_ressize_check(rqstp, p); 4530 } 4531 4532 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4533 { 4534 struct svc_rqst *rqstp = rq; 4535 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4536 4537 if (args->ops != args->iops) { 4538 kfree(args->ops); 4539 args->ops = args->iops; 4540 } 4541 kfree(args->tmpp); 4542 args->tmpp = NULL; 4543 while (args->to_free) { 4544 struct svcxdr_tmpbuf *tb = args->to_free; 4545 args->to_free = tb->next; 4546 kfree(tb); 4547 } 4548 return 1; 4549 } 4550 4551 int 4552 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4553 { 4554 if (rqstp->rq_arg.head[0].iov_len % 4) { 4555 /* client is nuts */ 4556 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4557 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4558 return 0; 4559 } 4560 args->p = p; 4561 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4562 args->pagelist = rqstp->rq_arg.pages; 4563 args->pagelen = rqstp->rq_arg.page_len; 4564 args->tmpp = NULL; 4565 args->to_free = NULL; 4566 args->ops = args->iops; 4567 args->rqstp = rqstp; 4568 4569 return !nfsd4_decode_compound(args); 4570 } 4571 4572 int 4573 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4574 { 4575 /* 4576 * All that remains is to write the tag and operation count... 4577 */ 4578 struct xdr_buf *buf = resp->xdr.buf; 4579 4580 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4581 buf->tail[0].iov_len); 4582 4583 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4584 4585 p = resp->tagp; 4586 *p++ = htonl(resp->taglen); 4587 memcpy(p, resp->tag, resp->taglen); 4588 p += XDR_QUADLEN(resp->taglen); 4589 *p++ = htonl(resp->opcnt); 4590 4591 nfsd4_sequence_done(resp); 4592 return 1; 4593 } 4594 4595 /* 4596 * Local variables: 4597 * c-basic-offset: 8 4598 * End: 4599 */ 4600