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 const u32 nfsd_suppattrs[3][3] = { 62 {NFSD4_SUPPORTED_ATTRS_WORD0, 63 NFSD4_SUPPORTED_ATTRS_WORD1, 64 NFSD4_SUPPORTED_ATTRS_WORD2}, 65 66 {NFSD4_1_SUPPORTED_ATTRS_WORD0, 67 NFSD4_1_SUPPORTED_ATTRS_WORD1, 68 NFSD4_1_SUPPORTED_ATTRS_WORD2}, 69 70 {NFSD4_1_SUPPORTED_ATTRS_WORD0, 71 NFSD4_1_SUPPORTED_ATTRS_WORD1, 72 NFSD4_2_SUPPORTED_ATTRS_WORD2}, 73 }; 74 75 /* 76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 77 * directory in order to indicate to the client that a filesystem boundary is present 78 * We use a fixed fsid for a referral 79 */ 80 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 81 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 82 83 static __be32 84 check_filename(char *str, int len) 85 { 86 int i; 87 88 if (len == 0) 89 return nfserr_inval; 90 if (isdotent(str, len)) 91 return nfserr_badname; 92 for (i = 0; i < len; i++) 93 if (str[i] == '/') 94 return nfserr_badname; 95 return 0; 96 } 97 98 #define DECODE_HEAD \ 99 __be32 *p; \ 100 __be32 status 101 #define DECODE_TAIL \ 102 status = 0; \ 103 out: \ 104 return status; \ 105 xdr_error: \ 106 dprintk("NFSD: xdr error (%s:%d)\n", \ 107 __FILE__, __LINE__); \ 108 status = nfserr_bad_xdr; \ 109 goto out 110 111 #define READMEM(x,nbytes) do { \ 112 x = (char *)p; \ 113 p += XDR_QUADLEN(nbytes); \ 114 } while (0) 115 #define SAVEMEM(x,nbytes) do { \ 116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 117 savemem(argp, p, nbytes) : \ 118 (char *)p)) { \ 119 dprintk("NFSD: xdr error (%s:%d)\n", \ 120 __FILE__, __LINE__); \ 121 goto xdr_error; \ 122 } \ 123 p += XDR_QUADLEN(nbytes); \ 124 } while (0) 125 #define COPYMEM(x,nbytes) do { \ 126 memcpy((x), p, nbytes); \ 127 p += XDR_QUADLEN(nbytes); \ 128 } while (0) 129 130 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 131 #define READ_BUF(nbytes) do { \ 132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 133 p = argp->p; \ 134 argp->p += XDR_QUADLEN(nbytes); \ 135 } else if (!(p = read_buf(argp, nbytes))) { \ 136 dprintk("NFSD: xdr error (%s:%d)\n", \ 137 __FILE__, __LINE__); \ 138 goto xdr_error; \ 139 } \ 140 } while (0) 141 142 static void next_decode_page(struct nfsd4_compoundargs *argp) 143 { 144 argp->p = page_address(argp->pagelist[0]); 145 argp->pagelist++; 146 if (argp->pagelen < PAGE_SIZE) { 147 argp->end = argp->p + XDR_QUADLEN(argp->pagelen); 148 argp->pagelen = 0; 149 } else { 150 argp->end = argp->p + (PAGE_SIZE>>2); 151 argp->pagelen -= PAGE_SIZE; 152 } 153 } 154 155 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 156 { 157 /* We want more bytes than seem to be available. 158 * Maybe we need a new page, maybe we have just run out 159 */ 160 unsigned int avail = (char *)argp->end - (char *)argp->p; 161 __be32 *p; 162 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 > NFS_FILE_SYNC) 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 next_decode_page(argp); 1283 } 1284 argp->p += XDR_QUADLEN(len); 1285 1286 DECODE_TAIL; 1287 } 1288 1289 static __be32 1290 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1291 { 1292 DECODE_HEAD; 1293 1294 if (argp->minorversion >= 1) 1295 return nfserr_notsupp; 1296 1297 READ_BUF(12); 1298 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1299 rlockowner->rl_owner.len = be32_to_cpup(p++); 1300 READ_BUF(rlockowner->rl_owner.len); 1301 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1302 1303 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1304 return nfserr_inval; 1305 DECODE_TAIL; 1306 } 1307 1308 static __be32 1309 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1310 struct nfsd4_exchange_id *exid) 1311 { 1312 int dummy, tmp; 1313 DECODE_HEAD; 1314 1315 READ_BUF(NFS4_VERIFIER_SIZE); 1316 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1317 1318 status = nfsd4_decode_opaque(argp, &exid->clname); 1319 if (status) 1320 return nfserr_bad_xdr; 1321 1322 READ_BUF(4); 1323 exid->flags = be32_to_cpup(p++); 1324 1325 /* Ignore state_protect4_a */ 1326 READ_BUF(4); 1327 exid->spa_how = be32_to_cpup(p++); 1328 switch (exid->spa_how) { 1329 case SP4_NONE: 1330 break; 1331 case SP4_MACH_CRED: 1332 /* spo_must_enforce */ 1333 status = nfsd4_decode_bitmap(argp, 1334 exid->spo_must_enforce); 1335 if (status) 1336 goto out; 1337 /* spo_must_allow */ 1338 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); 1339 if (status) 1340 goto out; 1341 break; 1342 case SP4_SSV: 1343 /* ssp_ops */ 1344 READ_BUF(4); 1345 dummy = be32_to_cpup(p++); 1346 READ_BUF(dummy * 4); 1347 p += dummy; 1348 1349 READ_BUF(4); 1350 dummy = be32_to_cpup(p++); 1351 READ_BUF(dummy * 4); 1352 p += dummy; 1353 1354 /* ssp_hash_algs<> */ 1355 READ_BUF(4); 1356 tmp = be32_to_cpup(p++); 1357 while (tmp--) { 1358 READ_BUF(4); 1359 dummy = be32_to_cpup(p++); 1360 READ_BUF(dummy); 1361 p += XDR_QUADLEN(dummy); 1362 } 1363 1364 /* ssp_encr_algs<> */ 1365 READ_BUF(4); 1366 tmp = be32_to_cpup(p++); 1367 while (tmp--) { 1368 READ_BUF(4); 1369 dummy = be32_to_cpup(p++); 1370 READ_BUF(dummy); 1371 p += XDR_QUADLEN(dummy); 1372 } 1373 1374 /* ssp_window and ssp_num_gss_handles */ 1375 READ_BUF(8); 1376 dummy = be32_to_cpup(p++); 1377 dummy = be32_to_cpup(p++); 1378 break; 1379 default: 1380 goto xdr_error; 1381 } 1382 1383 /* Ignore Implementation ID */ 1384 READ_BUF(4); /* nfs_impl_id4 array length */ 1385 dummy = be32_to_cpup(p++); 1386 1387 if (dummy > 1) 1388 goto xdr_error; 1389 1390 if (dummy == 1) { 1391 /* nii_domain */ 1392 READ_BUF(4); 1393 dummy = be32_to_cpup(p++); 1394 READ_BUF(dummy); 1395 p += XDR_QUADLEN(dummy); 1396 1397 /* nii_name */ 1398 READ_BUF(4); 1399 dummy = be32_to_cpup(p++); 1400 READ_BUF(dummy); 1401 p += XDR_QUADLEN(dummy); 1402 1403 /* nii_date */ 1404 READ_BUF(12); 1405 p += 3; 1406 } 1407 DECODE_TAIL; 1408 } 1409 1410 static __be32 1411 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1412 struct nfsd4_create_session *sess) 1413 { 1414 DECODE_HEAD; 1415 u32 dummy; 1416 1417 READ_BUF(16); 1418 COPYMEM(&sess->clientid, 8); 1419 sess->seqid = be32_to_cpup(p++); 1420 sess->flags = be32_to_cpup(p++); 1421 1422 /* Fore channel attrs */ 1423 READ_BUF(28); 1424 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1425 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1426 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1427 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1428 sess->fore_channel.maxops = be32_to_cpup(p++); 1429 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1430 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1431 if (sess->fore_channel.nr_rdma_attrs == 1) { 1432 READ_BUF(4); 1433 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1434 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1435 dprintk("Too many fore channel attr bitmaps!\n"); 1436 goto xdr_error; 1437 } 1438 1439 /* Back channel attrs */ 1440 READ_BUF(28); 1441 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1442 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1443 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1444 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1445 sess->back_channel.maxops = be32_to_cpup(p++); 1446 sess->back_channel.maxreqs = be32_to_cpup(p++); 1447 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1448 if (sess->back_channel.nr_rdma_attrs == 1) { 1449 READ_BUF(4); 1450 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1451 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1452 dprintk("Too many back channel attr bitmaps!\n"); 1453 goto xdr_error; 1454 } 1455 1456 READ_BUF(4); 1457 sess->callback_prog = be32_to_cpup(p++); 1458 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1459 DECODE_TAIL; 1460 } 1461 1462 static __be32 1463 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1464 struct nfsd4_destroy_session *destroy_session) 1465 { 1466 DECODE_HEAD; 1467 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1468 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1469 1470 DECODE_TAIL; 1471 } 1472 1473 static __be32 1474 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1475 struct nfsd4_free_stateid *free_stateid) 1476 { 1477 DECODE_HEAD; 1478 1479 READ_BUF(sizeof(stateid_t)); 1480 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1481 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1482 1483 DECODE_TAIL; 1484 } 1485 1486 static __be32 1487 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1488 struct nfsd4_sequence *seq) 1489 { 1490 DECODE_HEAD; 1491 1492 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1493 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1494 seq->seqid = be32_to_cpup(p++); 1495 seq->slotid = be32_to_cpup(p++); 1496 seq->maxslots = be32_to_cpup(p++); 1497 seq->cachethis = be32_to_cpup(p++); 1498 1499 DECODE_TAIL; 1500 } 1501 1502 static __be32 1503 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1504 { 1505 int i; 1506 __be32 *p, status; 1507 struct nfsd4_test_stateid_id *stateid; 1508 1509 READ_BUF(4); 1510 test_stateid->ts_num_ids = ntohl(*p++); 1511 1512 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1513 1514 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1515 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1516 if (!stateid) { 1517 status = nfserrno(-ENOMEM); 1518 goto out; 1519 } 1520 1521 INIT_LIST_HEAD(&stateid->ts_id_list); 1522 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1523 1524 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1525 if (status) 1526 goto out; 1527 } 1528 1529 status = 0; 1530 out: 1531 return status; 1532 xdr_error: 1533 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1534 status = nfserr_bad_xdr; 1535 goto out; 1536 } 1537 1538 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1539 { 1540 DECODE_HEAD; 1541 1542 READ_BUF(8); 1543 COPYMEM(&dc->clientid, 8); 1544 1545 DECODE_TAIL; 1546 } 1547 1548 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1549 { 1550 DECODE_HEAD; 1551 1552 READ_BUF(4); 1553 rc->rca_one_fs = be32_to_cpup(p++); 1554 1555 DECODE_TAIL; 1556 } 1557 1558 #ifdef CONFIG_NFSD_PNFS 1559 static __be32 1560 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1561 struct nfsd4_getdeviceinfo *gdev) 1562 { 1563 DECODE_HEAD; 1564 u32 num, i; 1565 1566 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1567 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1568 gdev->gd_layout_type = be32_to_cpup(p++); 1569 gdev->gd_maxcount = be32_to_cpup(p++); 1570 num = be32_to_cpup(p++); 1571 if (num) { 1572 READ_BUF(4 * num); 1573 gdev->gd_notify_types = be32_to_cpup(p++); 1574 for (i = 1; i < num; i++) { 1575 if (be32_to_cpup(p++)) { 1576 status = nfserr_inval; 1577 goto out; 1578 } 1579 } 1580 } 1581 DECODE_TAIL; 1582 } 1583 1584 static __be32 1585 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1586 struct nfsd4_layoutget *lgp) 1587 { 1588 DECODE_HEAD; 1589 1590 READ_BUF(36); 1591 lgp->lg_signal = be32_to_cpup(p++); 1592 lgp->lg_layout_type = be32_to_cpup(p++); 1593 lgp->lg_seg.iomode = be32_to_cpup(p++); 1594 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1595 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1596 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1597 1598 status = nfsd4_decode_stateid(argp, &lgp->lg_sid); 1599 if (status) 1600 return status; 1601 1602 READ_BUF(4); 1603 lgp->lg_maxcount = be32_to_cpup(p++); 1604 1605 DECODE_TAIL; 1606 } 1607 1608 static __be32 1609 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1610 struct nfsd4_layoutcommit *lcp) 1611 { 1612 DECODE_HEAD; 1613 u32 timechange; 1614 1615 READ_BUF(20); 1616 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1617 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1618 lcp->lc_reclaim = be32_to_cpup(p++); 1619 1620 status = nfsd4_decode_stateid(argp, &lcp->lc_sid); 1621 if (status) 1622 return status; 1623 1624 READ_BUF(4); 1625 lcp->lc_newoffset = be32_to_cpup(p++); 1626 if (lcp->lc_newoffset) { 1627 READ_BUF(8); 1628 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1629 } else 1630 lcp->lc_last_wr = 0; 1631 READ_BUF(4); 1632 timechange = be32_to_cpup(p++); 1633 if (timechange) { 1634 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1635 if (status) 1636 return status; 1637 } else { 1638 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1639 } 1640 READ_BUF(8); 1641 lcp->lc_layout_type = be32_to_cpup(p++); 1642 1643 /* 1644 * Save the layout update in XDR format and let the layout driver deal 1645 * with it later. 1646 */ 1647 lcp->lc_up_len = be32_to_cpup(p++); 1648 if (lcp->lc_up_len > 0) { 1649 READ_BUF(lcp->lc_up_len); 1650 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1651 } 1652 1653 DECODE_TAIL; 1654 } 1655 1656 static __be32 1657 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1658 struct nfsd4_layoutreturn *lrp) 1659 { 1660 DECODE_HEAD; 1661 1662 READ_BUF(16); 1663 lrp->lr_reclaim = be32_to_cpup(p++); 1664 lrp->lr_layout_type = be32_to_cpup(p++); 1665 lrp->lr_seg.iomode = be32_to_cpup(p++); 1666 lrp->lr_return_type = be32_to_cpup(p++); 1667 if (lrp->lr_return_type == RETURN_FILE) { 1668 READ_BUF(16); 1669 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1670 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1671 1672 status = nfsd4_decode_stateid(argp, &lrp->lr_sid); 1673 if (status) 1674 return status; 1675 1676 READ_BUF(4); 1677 lrp->lrf_body_len = be32_to_cpup(p++); 1678 if (lrp->lrf_body_len > 0) { 1679 READ_BUF(lrp->lrf_body_len); 1680 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1681 } 1682 } else { 1683 lrp->lr_seg.offset = 0; 1684 lrp->lr_seg.length = NFS4_MAX_UINT64; 1685 } 1686 1687 DECODE_TAIL; 1688 } 1689 #endif /* CONFIG_NFSD_PNFS */ 1690 1691 static __be32 1692 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1693 struct nfsd4_fallocate *fallocate) 1694 { 1695 DECODE_HEAD; 1696 1697 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1698 if (status) 1699 return status; 1700 1701 READ_BUF(16); 1702 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1703 xdr_decode_hyper(p, &fallocate->falloc_length); 1704 1705 DECODE_TAIL; 1706 } 1707 1708 static __be32 1709 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) 1710 { 1711 DECODE_HEAD; 1712 1713 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); 1714 if (status) 1715 return status; 1716 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); 1717 if (status) 1718 return status; 1719 1720 READ_BUF(8 + 8 + 8); 1721 p = xdr_decode_hyper(p, &clone->cl_src_pos); 1722 p = xdr_decode_hyper(p, &clone->cl_dst_pos); 1723 p = xdr_decode_hyper(p, &clone->cl_count); 1724 DECODE_TAIL; 1725 } 1726 1727 static __be32 1728 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) 1729 { 1730 DECODE_HEAD; 1731 unsigned int tmp; 1732 1733 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); 1734 if (status) 1735 return status; 1736 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); 1737 if (status) 1738 return status; 1739 1740 READ_BUF(8 + 8 + 8 + 4 + 4 + 4); 1741 p = xdr_decode_hyper(p, ©->cp_src_pos); 1742 p = xdr_decode_hyper(p, ©->cp_dst_pos); 1743 p = xdr_decode_hyper(p, ©->cp_count); 1744 copy->cp_consecutive = be32_to_cpup(p++); 1745 copy->cp_synchronous = be32_to_cpup(p++); 1746 tmp = be32_to_cpup(p); /* Source server list not supported */ 1747 1748 DECODE_TAIL; 1749 } 1750 1751 static __be32 1752 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1753 { 1754 DECODE_HEAD; 1755 1756 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1757 if (status) 1758 return status; 1759 1760 READ_BUF(8 + 4); 1761 p = xdr_decode_hyper(p, &seek->seek_offset); 1762 seek->seek_whence = be32_to_cpup(p); 1763 1764 DECODE_TAIL; 1765 } 1766 1767 static __be32 1768 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1769 { 1770 return nfs_ok; 1771 } 1772 1773 static __be32 1774 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1775 { 1776 return nfserr_notsupp; 1777 } 1778 1779 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1780 1781 static nfsd4_dec nfsd4_dec_ops[] = { 1782 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1783 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1784 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1785 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1786 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1787 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1788 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1789 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1790 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1791 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1792 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1793 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1794 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1795 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1796 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1797 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1798 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1799 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1800 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1801 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1802 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1803 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1804 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1805 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1806 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1807 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1808 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1809 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1810 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1811 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1812 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1813 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1814 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1815 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1816 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1817 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1818 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1819 1820 /* new operations for NFSv4.1 */ 1821 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1822 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1823 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1824 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1825 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1826 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1827 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1828 #ifdef CONFIG_NFSD_PNFS 1829 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1830 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1831 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1832 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1833 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1834 #else 1835 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1836 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1837 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1838 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1839 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1840 #endif 1841 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1842 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1843 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1844 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1845 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1846 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1847 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1848 1849 /* new operations for NFSv4.2 */ 1850 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1851 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, 1852 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1853 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1854 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1855 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1856 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1857 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1858 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1859 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1860 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1861 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1862 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, 1863 }; 1864 1865 static inline bool 1866 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1867 { 1868 if (op->opnum < FIRST_NFS4_OP) 1869 return false; 1870 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1871 return false; 1872 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1873 return false; 1874 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1875 return false; 1876 return true; 1877 } 1878 1879 static __be32 1880 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1881 { 1882 DECODE_HEAD; 1883 struct nfsd4_op *op; 1884 bool cachethis = false; 1885 int auth_slack= argp->rqstp->rq_auth_slack; 1886 int max_reply = auth_slack + 8; /* opcnt, status */ 1887 int readcount = 0; 1888 int readbytes = 0; 1889 int i; 1890 1891 READ_BUF(4); 1892 argp->taglen = be32_to_cpup(p++); 1893 READ_BUF(argp->taglen); 1894 SAVEMEM(argp->tag, argp->taglen); 1895 READ_BUF(8); 1896 argp->minorversion = be32_to_cpup(p++); 1897 argp->opcnt = be32_to_cpup(p++); 1898 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1899 1900 if (argp->taglen > NFSD4_MAX_TAGLEN) 1901 goto xdr_error; 1902 if (argp->opcnt > 100) 1903 goto xdr_error; 1904 1905 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1906 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1907 if (!argp->ops) { 1908 argp->ops = argp->iops; 1909 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1910 goto xdr_error; 1911 } 1912 } 1913 1914 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1915 argp->opcnt = 0; 1916 1917 for (i = 0; i < argp->opcnt; i++) { 1918 op = &argp->ops[i]; 1919 op->replay = NULL; 1920 1921 READ_BUF(4); 1922 op->opnum = be32_to_cpup(p++); 1923 1924 if (nfsd4_opnum_in_range(argp, op)) 1925 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1926 else { 1927 op->opnum = OP_ILLEGAL; 1928 op->status = nfserr_op_illegal; 1929 } 1930 /* 1931 * We'll try to cache the result in the DRC if any one 1932 * op in the compound wants to be cached: 1933 */ 1934 cachethis |= nfsd4_cache_this_op(op); 1935 1936 if (op->opnum == OP_READ) { 1937 readcount++; 1938 readbytes += nfsd4_max_reply(argp->rqstp, op); 1939 } else 1940 max_reply += nfsd4_max_reply(argp->rqstp, op); 1941 /* 1942 * OP_LOCK and OP_LOCKT may return a conflicting lock. 1943 * (Special case because it will just skip encoding this 1944 * if it runs out of xdr buffer space, and it is the only 1945 * operation that behaves this way.) 1946 */ 1947 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) 1948 max_reply += NFS4_OPAQUE_LIMIT; 1949 1950 if (op->status) { 1951 argp->opcnt = i+1; 1952 break; 1953 } 1954 } 1955 /* Sessions make the DRC unnecessary: */ 1956 if (argp->minorversion) 1957 cachethis = false; 1958 svc_reserve(argp->rqstp, max_reply + readbytes); 1959 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1960 1961 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1962 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1963 1964 DECODE_TAIL; 1965 } 1966 1967 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, 1968 struct svc_export *exp) 1969 { 1970 if (exp->ex_flags & NFSEXP_V4ROOT) { 1971 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); 1972 *p++ = 0; 1973 } else if (IS_I_VERSION(inode)) { 1974 p = xdr_encode_hyper(p, nfsd4_change_attribute(inode)); 1975 } else { 1976 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1977 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1978 } 1979 return p; 1980 } 1981 1982 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1983 { 1984 *p++ = cpu_to_be32(c->atomic); 1985 if (c->change_supported) { 1986 p = xdr_encode_hyper(p, c->before_change); 1987 p = xdr_encode_hyper(p, c->after_change); 1988 } else { 1989 *p++ = cpu_to_be32(c->before_ctime_sec); 1990 *p++ = cpu_to_be32(c->before_ctime_nsec); 1991 *p++ = cpu_to_be32(c->after_ctime_sec); 1992 *p++ = cpu_to_be32(c->after_ctime_nsec); 1993 } 1994 return p; 1995 } 1996 1997 /* Encode as an array of strings the string given with components 1998 * separated @sep, escaped with esc_enter and esc_exit. 1999 */ 2000 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 2001 char *components, char esc_enter, 2002 char esc_exit) 2003 { 2004 __be32 *p; 2005 __be32 pathlen; 2006 int pathlen_offset; 2007 int strlen, count=0; 2008 char *str, *end, *next; 2009 2010 dprintk("nfsd4_encode_components(%s)\n", components); 2011 2012 pathlen_offset = xdr->buf->len; 2013 p = xdr_reserve_space(xdr, 4); 2014 if (!p) 2015 return nfserr_resource; 2016 p++; /* We will fill this in with @count later */ 2017 2018 end = str = components; 2019 while (*end) { 2020 bool found_esc = false; 2021 2022 /* try to parse as esc_start, ..., esc_end, sep */ 2023 if (*str == esc_enter) { 2024 for (; *end && (*end != esc_exit); end++) 2025 /* find esc_exit or end of string */; 2026 next = end + 1; 2027 if (*end && (!*next || *next == sep)) { 2028 str++; 2029 found_esc = true; 2030 } 2031 } 2032 2033 if (!found_esc) 2034 for (; *end && (*end != sep); end++) 2035 /* find sep or end of string */; 2036 2037 strlen = end - str; 2038 if (strlen) { 2039 p = xdr_reserve_space(xdr, strlen + 4); 2040 if (!p) 2041 return nfserr_resource; 2042 p = xdr_encode_opaque(p, str, strlen); 2043 count++; 2044 } 2045 else 2046 end++; 2047 if (found_esc) 2048 end = next; 2049 2050 str = end; 2051 } 2052 pathlen = htonl(count); 2053 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 2054 return 0; 2055 } 2056 2057 /* Encode as an array of strings the string given with components 2058 * separated @sep. 2059 */ 2060 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2061 char *components) 2062 { 2063 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2064 } 2065 2066 /* 2067 * encode a location element of a fs_locations structure 2068 */ 2069 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2070 struct nfsd4_fs_location *location) 2071 { 2072 __be32 status; 2073 2074 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2075 '[', ']'); 2076 if (status) 2077 return status; 2078 status = nfsd4_encode_components(xdr, '/', location->path); 2079 if (status) 2080 return status; 2081 return 0; 2082 } 2083 2084 /* 2085 * Encode a path in RFC3530 'pathname4' format 2086 */ 2087 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2088 const struct path *root, 2089 const struct path *path) 2090 { 2091 struct path cur = *path; 2092 __be32 *p; 2093 struct dentry **components = NULL; 2094 unsigned int ncomponents = 0; 2095 __be32 err = nfserr_jukebox; 2096 2097 dprintk("nfsd4_encode_components("); 2098 2099 path_get(&cur); 2100 /* First walk the path up to the nfsd root, and store the 2101 * dentries/path components in an array. 2102 */ 2103 for (;;) { 2104 if (path_equal(&cur, root)) 2105 break; 2106 if (cur.dentry == cur.mnt->mnt_root) { 2107 if (follow_up(&cur)) 2108 continue; 2109 goto out_free; 2110 } 2111 if ((ncomponents & 15) == 0) { 2112 struct dentry **new; 2113 new = krealloc(components, 2114 sizeof(*new) * (ncomponents + 16), 2115 GFP_KERNEL); 2116 if (!new) 2117 goto out_free; 2118 components = new; 2119 } 2120 components[ncomponents++] = cur.dentry; 2121 cur.dentry = dget_parent(cur.dentry); 2122 } 2123 err = nfserr_resource; 2124 p = xdr_reserve_space(xdr, 4); 2125 if (!p) 2126 goto out_free; 2127 *p++ = cpu_to_be32(ncomponents); 2128 2129 while (ncomponents) { 2130 struct dentry *dentry = components[ncomponents - 1]; 2131 unsigned int len; 2132 2133 spin_lock(&dentry->d_lock); 2134 len = dentry->d_name.len; 2135 p = xdr_reserve_space(xdr, len + 4); 2136 if (!p) { 2137 spin_unlock(&dentry->d_lock); 2138 goto out_free; 2139 } 2140 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2141 dprintk("/%pd", dentry); 2142 spin_unlock(&dentry->d_lock); 2143 dput(dentry); 2144 ncomponents--; 2145 } 2146 2147 err = 0; 2148 out_free: 2149 dprintk(")\n"); 2150 while (ncomponents) 2151 dput(components[--ncomponents]); 2152 kfree(components); 2153 path_put(&cur); 2154 return err; 2155 } 2156 2157 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2158 struct svc_rqst *rqstp, const struct path *path) 2159 { 2160 struct svc_export *exp_ps; 2161 __be32 res; 2162 2163 exp_ps = rqst_find_fsidzero_export(rqstp); 2164 if (IS_ERR(exp_ps)) 2165 return nfserrno(PTR_ERR(exp_ps)); 2166 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2167 exp_put(exp_ps); 2168 return res; 2169 } 2170 2171 /* 2172 * encode a fs_locations structure 2173 */ 2174 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2175 struct svc_rqst *rqstp, struct svc_export *exp) 2176 { 2177 __be32 status; 2178 int i; 2179 __be32 *p; 2180 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2181 2182 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2183 if (status) 2184 return status; 2185 p = xdr_reserve_space(xdr, 4); 2186 if (!p) 2187 return nfserr_resource; 2188 *p++ = cpu_to_be32(fslocs->locations_count); 2189 for (i=0; i<fslocs->locations_count; i++) { 2190 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2191 if (status) 2192 return status; 2193 } 2194 return 0; 2195 } 2196 2197 static u32 nfs4_file_type(umode_t mode) 2198 { 2199 switch (mode & S_IFMT) { 2200 case S_IFIFO: return NF4FIFO; 2201 case S_IFCHR: return NF4CHR; 2202 case S_IFDIR: return NF4DIR; 2203 case S_IFBLK: return NF4BLK; 2204 case S_IFLNK: return NF4LNK; 2205 case S_IFREG: return NF4REG; 2206 case S_IFSOCK: return NF4SOCK; 2207 default: return NF4BAD; 2208 }; 2209 } 2210 2211 static inline __be32 2212 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2213 struct nfs4_ace *ace) 2214 { 2215 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2216 return nfs4_acl_write_who(xdr, ace->whotype); 2217 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2218 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2219 else 2220 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2221 } 2222 2223 static inline __be32 2224 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) 2225 { 2226 __be32 *p; 2227 unsigned long i = hweight_long(layout_types); 2228 2229 p = xdr_reserve_space(xdr, 4 + 4 * i); 2230 if (!p) 2231 return nfserr_resource; 2232 2233 *p++ = cpu_to_be32(i); 2234 2235 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) 2236 if (layout_types & (1 << i)) 2237 *p++ = cpu_to_be32(i); 2238 2239 return 0; 2240 } 2241 2242 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2243 FATTR4_WORD0_RDATTR_ERROR) 2244 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2245 #define WORD2_ABSENT_FS_ATTRS 0 2246 2247 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2248 static inline __be32 2249 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2250 void *context, int len) 2251 { 2252 __be32 *p; 2253 2254 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2255 if (!p) 2256 return nfserr_resource; 2257 2258 /* 2259 * For now we use a 0 here to indicate the null translation; in 2260 * the future we may place a call to translation code here. 2261 */ 2262 *p++ = cpu_to_be32(0); /* lfs */ 2263 *p++ = cpu_to_be32(0); /* pi */ 2264 p = xdr_encode_opaque(p, context, len); 2265 return 0; 2266 } 2267 #else 2268 static inline __be32 2269 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2270 void *context, int len) 2271 { return 0; } 2272 #endif 2273 2274 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2275 { 2276 /* As per referral draft: */ 2277 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2278 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2279 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2280 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2281 *rdattr_err = NFSERR_MOVED; 2282 else 2283 return nfserr_moved; 2284 } 2285 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2286 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2287 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2288 return 0; 2289 } 2290 2291 2292 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2293 { 2294 struct path path = exp->ex_path; 2295 int err; 2296 2297 path_get(&path); 2298 while (follow_up(&path)) { 2299 if (path.dentry != path.mnt->mnt_root) 2300 break; 2301 } 2302 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); 2303 path_put(&path); 2304 return err; 2305 } 2306 2307 static __be32 2308 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2309 { 2310 __be32 *p; 2311 2312 if (bmval2) { 2313 p = xdr_reserve_space(xdr, 16); 2314 if (!p) 2315 goto out_resource; 2316 *p++ = cpu_to_be32(3); 2317 *p++ = cpu_to_be32(bmval0); 2318 *p++ = cpu_to_be32(bmval1); 2319 *p++ = cpu_to_be32(bmval2); 2320 } else if (bmval1) { 2321 p = xdr_reserve_space(xdr, 12); 2322 if (!p) 2323 goto out_resource; 2324 *p++ = cpu_to_be32(2); 2325 *p++ = cpu_to_be32(bmval0); 2326 *p++ = cpu_to_be32(bmval1); 2327 } else { 2328 p = xdr_reserve_space(xdr, 8); 2329 if (!p) 2330 goto out_resource; 2331 *p++ = cpu_to_be32(1); 2332 *p++ = cpu_to_be32(bmval0); 2333 } 2334 2335 return 0; 2336 out_resource: 2337 return nfserr_resource; 2338 } 2339 2340 /* 2341 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2342 * ourselves. 2343 */ 2344 static __be32 2345 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2346 struct svc_export *exp, 2347 struct dentry *dentry, u32 *bmval, 2348 struct svc_rqst *rqstp, int ignore_crossmnt) 2349 { 2350 u32 bmval0 = bmval[0]; 2351 u32 bmval1 = bmval[1]; 2352 u32 bmval2 = bmval[2]; 2353 struct kstat stat; 2354 struct svc_fh *tempfh = NULL; 2355 struct kstatfs statfs; 2356 __be32 *p; 2357 int starting_len = xdr->buf->len; 2358 int attrlen_offset; 2359 __be32 attrlen; 2360 u32 dummy; 2361 u64 dummy64; 2362 u32 rdattr_err = 0; 2363 __be32 status; 2364 int err; 2365 struct nfs4_acl *acl = NULL; 2366 void *context = NULL; 2367 int contextlen; 2368 bool contextsupport = false; 2369 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2370 u32 minorversion = resp->cstate.minorversion; 2371 struct path path = { 2372 .mnt = exp->ex_path.mnt, 2373 .dentry = dentry, 2374 }; 2375 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2376 2377 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2378 BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); 2379 2380 if (exp->ex_fslocs.migrated) { 2381 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2382 if (status) 2383 goto out; 2384 } 2385 2386 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); 2387 if (err) 2388 goto out_nfserr; 2389 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2390 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2391 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2392 FATTR4_WORD1_SPACE_TOTAL))) { 2393 err = vfs_statfs(&path, &statfs); 2394 if (err) 2395 goto out_nfserr; 2396 } 2397 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2398 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2399 status = nfserr_jukebox; 2400 if (!tempfh) 2401 goto out; 2402 fh_init(tempfh, NFS4_FHSIZE); 2403 status = fh_compose(tempfh, exp, dentry, NULL); 2404 if (status) 2405 goto out; 2406 fhp = tempfh; 2407 } 2408 if (bmval0 & FATTR4_WORD0_ACL) { 2409 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2410 if (err == -EOPNOTSUPP) 2411 bmval0 &= ~FATTR4_WORD0_ACL; 2412 else if (err == -EINVAL) { 2413 status = nfserr_attrnotsupp; 2414 goto out; 2415 } else if (err != 0) 2416 goto out_nfserr; 2417 } 2418 2419 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2420 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2421 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2422 if (exp->ex_flags & NFSEXP_SECURITY_LABEL) 2423 err = security_inode_getsecctx(d_inode(dentry), 2424 &context, &contextlen); 2425 else 2426 err = -EOPNOTSUPP; 2427 contextsupport = (err == 0); 2428 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2429 if (err == -EOPNOTSUPP) 2430 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2431 else if (err) 2432 goto out_nfserr; 2433 } 2434 } 2435 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2436 2437 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2438 if (status) 2439 goto out; 2440 2441 attrlen_offset = xdr->buf->len; 2442 p = xdr_reserve_space(xdr, 4); 2443 if (!p) 2444 goto out_resource; 2445 p++; /* to be backfilled later */ 2446 2447 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2448 u32 supp[3]; 2449 2450 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); 2451 2452 if (!IS_POSIXACL(dentry->d_inode)) 2453 supp[0] &= ~FATTR4_WORD0_ACL; 2454 if (!contextsupport) 2455 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2456 if (!supp[2]) { 2457 p = xdr_reserve_space(xdr, 12); 2458 if (!p) 2459 goto out_resource; 2460 *p++ = cpu_to_be32(2); 2461 *p++ = cpu_to_be32(supp[0]); 2462 *p++ = cpu_to_be32(supp[1]); 2463 } else { 2464 p = xdr_reserve_space(xdr, 16); 2465 if (!p) 2466 goto out_resource; 2467 *p++ = cpu_to_be32(3); 2468 *p++ = cpu_to_be32(supp[0]); 2469 *p++ = cpu_to_be32(supp[1]); 2470 *p++ = cpu_to_be32(supp[2]); 2471 } 2472 } 2473 if (bmval0 & FATTR4_WORD0_TYPE) { 2474 p = xdr_reserve_space(xdr, 4); 2475 if (!p) 2476 goto out_resource; 2477 dummy = nfs4_file_type(stat.mode); 2478 if (dummy == NF4BAD) { 2479 status = nfserr_serverfault; 2480 goto out; 2481 } 2482 *p++ = cpu_to_be32(dummy); 2483 } 2484 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2485 p = xdr_reserve_space(xdr, 4); 2486 if (!p) 2487 goto out_resource; 2488 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2489 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2490 else 2491 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2492 NFS4_FH_VOL_RENAME); 2493 } 2494 if (bmval0 & FATTR4_WORD0_CHANGE) { 2495 p = xdr_reserve_space(xdr, 8); 2496 if (!p) 2497 goto out_resource; 2498 p = encode_change(p, &stat, d_inode(dentry), exp); 2499 } 2500 if (bmval0 & FATTR4_WORD0_SIZE) { 2501 p = xdr_reserve_space(xdr, 8); 2502 if (!p) 2503 goto out_resource; 2504 p = xdr_encode_hyper(p, stat.size); 2505 } 2506 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2507 p = xdr_reserve_space(xdr, 4); 2508 if (!p) 2509 goto out_resource; 2510 *p++ = cpu_to_be32(1); 2511 } 2512 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2513 p = xdr_reserve_space(xdr, 4); 2514 if (!p) 2515 goto out_resource; 2516 *p++ = cpu_to_be32(1); 2517 } 2518 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2519 p = xdr_reserve_space(xdr, 4); 2520 if (!p) 2521 goto out_resource; 2522 *p++ = cpu_to_be32(0); 2523 } 2524 if (bmval0 & FATTR4_WORD0_FSID) { 2525 p = xdr_reserve_space(xdr, 16); 2526 if (!p) 2527 goto out_resource; 2528 if (exp->ex_fslocs.migrated) { 2529 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2530 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2531 } else switch(fsid_source(fhp)) { 2532 case FSIDSOURCE_FSID: 2533 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2534 p = xdr_encode_hyper(p, (u64)0); 2535 break; 2536 case FSIDSOURCE_DEV: 2537 *p++ = cpu_to_be32(0); 2538 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2539 *p++ = cpu_to_be32(0); 2540 *p++ = cpu_to_be32(MINOR(stat.dev)); 2541 break; 2542 case FSIDSOURCE_UUID: 2543 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2544 EX_UUID_LEN); 2545 break; 2546 } 2547 } 2548 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2549 p = xdr_reserve_space(xdr, 4); 2550 if (!p) 2551 goto out_resource; 2552 *p++ = cpu_to_be32(0); 2553 } 2554 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2555 p = xdr_reserve_space(xdr, 4); 2556 if (!p) 2557 goto out_resource; 2558 *p++ = cpu_to_be32(nn->nfsd4_lease); 2559 } 2560 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2561 p = xdr_reserve_space(xdr, 4); 2562 if (!p) 2563 goto out_resource; 2564 *p++ = cpu_to_be32(rdattr_err); 2565 } 2566 if (bmval0 & FATTR4_WORD0_ACL) { 2567 struct nfs4_ace *ace; 2568 2569 if (acl == NULL) { 2570 p = xdr_reserve_space(xdr, 4); 2571 if (!p) 2572 goto out_resource; 2573 2574 *p++ = cpu_to_be32(0); 2575 goto out_acl; 2576 } 2577 p = xdr_reserve_space(xdr, 4); 2578 if (!p) 2579 goto out_resource; 2580 *p++ = cpu_to_be32(acl->naces); 2581 2582 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2583 p = xdr_reserve_space(xdr, 4*3); 2584 if (!p) 2585 goto out_resource; 2586 *p++ = cpu_to_be32(ace->type); 2587 *p++ = cpu_to_be32(ace->flag); 2588 *p++ = cpu_to_be32(ace->access_mask & 2589 NFS4_ACE_MASK_ALL); 2590 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2591 if (status) 2592 goto out; 2593 } 2594 } 2595 out_acl: 2596 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2597 p = xdr_reserve_space(xdr, 4); 2598 if (!p) 2599 goto out_resource; 2600 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2601 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2602 } 2603 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2604 p = xdr_reserve_space(xdr, 4); 2605 if (!p) 2606 goto out_resource; 2607 *p++ = cpu_to_be32(1); 2608 } 2609 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2610 p = xdr_reserve_space(xdr, 4); 2611 if (!p) 2612 goto out_resource; 2613 *p++ = cpu_to_be32(0); 2614 } 2615 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2616 p = xdr_reserve_space(xdr, 4); 2617 if (!p) 2618 goto out_resource; 2619 *p++ = cpu_to_be32(1); 2620 } 2621 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2622 p = xdr_reserve_space(xdr, 4); 2623 if (!p) 2624 goto out_resource; 2625 *p++ = cpu_to_be32(1); 2626 } 2627 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2628 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2629 if (!p) 2630 goto out_resource; 2631 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2632 fhp->fh_handle.fh_size); 2633 } 2634 if (bmval0 & FATTR4_WORD0_FILEID) { 2635 p = xdr_reserve_space(xdr, 8); 2636 if (!p) 2637 goto out_resource; 2638 p = xdr_encode_hyper(p, stat.ino); 2639 } 2640 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2641 p = xdr_reserve_space(xdr, 8); 2642 if (!p) 2643 goto out_resource; 2644 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2645 } 2646 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2647 p = xdr_reserve_space(xdr, 8); 2648 if (!p) 2649 goto out_resource; 2650 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2651 } 2652 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2653 p = xdr_reserve_space(xdr, 8); 2654 if (!p) 2655 goto out_resource; 2656 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2657 } 2658 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2659 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2660 if (status) 2661 goto out; 2662 } 2663 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2664 p = xdr_reserve_space(xdr, 4); 2665 if (!p) 2666 goto out_resource; 2667 *p++ = cpu_to_be32(1); 2668 } 2669 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2670 p = xdr_reserve_space(xdr, 8); 2671 if (!p) 2672 goto out_resource; 2673 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2674 } 2675 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2676 p = xdr_reserve_space(xdr, 4); 2677 if (!p) 2678 goto out_resource; 2679 *p++ = cpu_to_be32(255); 2680 } 2681 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2682 p = xdr_reserve_space(xdr, 4); 2683 if (!p) 2684 goto out_resource; 2685 *p++ = cpu_to_be32(statfs.f_namelen); 2686 } 2687 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2688 p = xdr_reserve_space(xdr, 8); 2689 if (!p) 2690 goto out_resource; 2691 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2692 } 2693 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2694 p = xdr_reserve_space(xdr, 8); 2695 if (!p) 2696 goto out_resource; 2697 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2698 } 2699 if (bmval1 & FATTR4_WORD1_MODE) { 2700 p = xdr_reserve_space(xdr, 4); 2701 if (!p) 2702 goto out_resource; 2703 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2704 } 2705 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2706 p = xdr_reserve_space(xdr, 4); 2707 if (!p) 2708 goto out_resource; 2709 *p++ = cpu_to_be32(1); 2710 } 2711 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2712 p = xdr_reserve_space(xdr, 4); 2713 if (!p) 2714 goto out_resource; 2715 *p++ = cpu_to_be32(stat.nlink); 2716 } 2717 if (bmval1 & FATTR4_WORD1_OWNER) { 2718 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2719 if (status) 2720 goto out; 2721 } 2722 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2723 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2724 if (status) 2725 goto out; 2726 } 2727 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2728 p = xdr_reserve_space(xdr, 8); 2729 if (!p) 2730 goto out_resource; 2731 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2732 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2733 } 2734 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2735 p = xdr_reserve_space(xdr, 8); 2736 if (!p) 2737 goto out_resource; 2738 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2739 p = xdr_encode_hyper(p, dummy64); 2740 } 2741 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2742 p = xdr_reserve_space(xdr, 8); 2743 if (!p) 2744 goto out_resource; 2745 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2746 p = xdr_encode_hyper(p, dummy64); 2747 } 2748 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2749 p = xdr_reserve_space(xdr, 8); 2750 if (!p) 2751 goto out_resource; 2752 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2753 p = xdr_encode_hyper(p, dummy64); 2754 } 2755 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2756 p = xdr_reserve_space(xdr, 8); 2757 if (!p) 2758 goto out_resource; 2759 dummy64 = (u64)stat.blocks << 9; 2760 p = xdr_encode_hyper(p, dummy64); 2761 } 2762 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2763 p = xdr_reserve_space(xdr, 12); 2764 if (!p) 2765 goto out_resource; 2766 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2767 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2768 } 2769 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2770 p = xdr_reserve_space(xdr, 12); 2771 if (!p) 2772 goto out_resource; 2773 *p++ = cpu_to_be32(0); 2774 *p++ = cpu_to_be32(1); 2775 *p++ = cpu_to_be32(0); 2776 } 2777 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2778 p = xdr_reserve_space(xdr, 12); 2779 if (!p) 2780 goto out_resource; 2781 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2782 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2783 } 2784 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2785 p = xdr_reserve_space(xdr, 12); 2786 if (!p) 2787 goto out_resource; 2788 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2789 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2790 } 2791 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2792 struct kstat parent_stat; 2793 u64 ino = stat.ino; 2794 2795 p = xdr_reserve_space(xdr, 8); 2796 if (!p) 2797 goto out_resource; 2798 /* 2799 * Get parent's attributes if not ignoring crossmount 2800 * and this is the root of a cross-mounted filesystem. 2801 */ 2802 if (ignore_crossmnt == 0 && 2803 dentry == exp->ex_path.mnt->mnt_root) { 2804 err = get_parent_attributes(exp, &parent_stat); 2805 if (err) 2806 goto out_nfserr; 2807 ino = parent_stat.ino; 2808 } 2809 p = xdr_encode_hyper(p, ino); 2810 } 2811 #ifdef CONFIG_NFSD_PNFS 2812 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2813 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2814 if (status) 2815 goto out; 2816 } 2817 2818 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2819 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2820 if (status) 2821 goto out; 2822 } 2823 2824 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2825 p = xdr_reserve_space(xdr, 4); 2826 if (!p) 2827 goto out_resource; 2828 *p++ = cpu_to_be32(stat.blksize); 2829 } 2830 #endif /* CONFIG_NFSD_PNFS */ 2831 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2832 u32 supp[3]; 2833 2834 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); 2835 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; 2836 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; 2837 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; 2838 2839 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); 2840 if (status) 2841 goto out; 2842 } 2843 2844 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2845 status = nfsd4_encode_security_label(xdr, rqstp, context, 2846 contextlen); 2847 if (status) 2848 goto out; 2849 } 2850 2851 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2852 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2853 status = nfs_ok; 2854 2855 out: 2856 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2857 if (context) 2858 security_release_secctx(context, contextlen); 2859 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2860 kfree(acl); 2861 if (tempfh) { 2862 fh_put(tempfh); 2863 kfree(tempfh); 2864 } 2865 if (status) 2866 xdr_truncate_encode(xdr, starting_len); 2867 return status; 2868 out_nfserr: 2869 status = nfserrno(err); 2870 goto out; 2871 out_resource: 2872 status = nfserr_resource; 2873 goto out; 2874 } 2875 2876 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2877 struct xdr_buf *buf, __be32 *p, int bytes) 2878 { 2879 xdr->scratch.iov_len = 0; 2880 memset(buf, 0, sizeof(struct xdr_buf)); 2881 buf->head[0].iov_base = p; 2882 buf->head[0].iov_len = 0; 2883 buf->len = 0; 2884 xdr->buf = buf; 2885 xdr->iov = buf->head; 2886 xdr->p = p; 2887 xdr->end = (void *)p + bytes; 2888 buf->buflen = bytes; 2889 } 2890 2891 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2892 struct svc_fh *fhp, struct svc_export *exp, 2893 struct dentry *dentry, u32 *bmval, 2894 struct svc_rqst *rqstp, int ignore_crossmnt) 2895 { 2896 struct xdr_buf dummy; 2897 struct xdr_stream xdr; 2898 __be32 ret; 2899 2900 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2901 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2902 ignore_crossmnt); 2903 *p = xdr.p; 2904 return ret; 2905 } 2906 2907 static inline int attributes_need_mount(u32 *bmval) 2908 { 2909 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2910 return 1; 2911 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2912 return 1; 2913 return 0; 2914 } 2915 2916 static __be32 2917 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2918 const char *name, int namlen) 2919 { 2920 struct svc_export *exp = cd->rd_fhp->fh_export; 2921 struct dentry *dentry; 2922 __be32 nfserr; 2923 int ignore_crossmnt = 0; 2924 2925 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2926 if (IS_ERR(dentry)) 2927 return nfserrno(PTR_ERR(dentry)); 2928 if (d_really_is_negative(dentry)) { 2929 /* 2930 * we're not holding the i_mutex here, so there's 2931 * a window where this directory entry could have gone 2932 * away. 2933 */ 2934 dput(dentry); 2935 return nfserr_noent; 2936 } 2937 2938 exp_get(exp); 2939 /* 2940 * In the case of a mountpoint, the client may be asking for 2941 * attributes that are only properties of the underlying filesystem 2942 * as opposed to the cross-mounted file system. In such a case, 2943 * we will not follow the cross mount and will fill the attribtutes 2944 * directly from the mountpoint dentry. 2945 */ 2946 if (nfsd_mountpoint(dentry, exp)) { 2947 int err; 2948 2949 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2950 && !attributes_need_mount(cd->rd_bmval)) { 2951 ignore_crossmnt = 1; 2952 goto out_encode; 2953 } 2954 /* 2955 * Why the heck aren't we just using nfsd_lookup?? 2956 * Different "."/".." handling? Something else? 2957 * At least, add a comment here to explain.... 2958 */ 2959 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2960 if (err) { 2961 nfserr = nfserrno(err); 2962 goto out_put; 2963 } 2964 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2965 if (nfserr) 2966 goto out_put; 2967 2968 } 2969 out_encode: 2970 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2971 cd->rd_rqstp, ignore_crossmnt); 2972 out_put: 2973 dput(dentry); 2974 exp_put(exp); 2975 return nfserr; 2976 } 2977 2978 static __be32 * 2979 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2980 { 2981 __be32 *p; 2982 2983 p = xdr_reserve_space(xdr, 20); 2984 if (!p) 2985 return NULL; 2986 *p++ = htonl(2); 2987 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2988 *p++ = htonl(0); /* bmval1 */ 2989 2990 *p++ = htonl(4); /* attribute length */ 2991 *p++ = nfserr; /* no htonl */ 2992 return p; 2993 } 2994 2995 static int 2996 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2997 loff_t offset, u64 ino, unsigned int d_type) 2998 { 2999 struct readdir_cd *ccd = ccdv; 3000 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 3001 struct xdr_stream *xdr = cd->xdr; 3002 int start_offset = xdr->buf->len; 3003 int cookie_offset; 3004 u32 name_and_cookie; 3005 int entry_bytes; 3006 __be32 nfserr = nfserr_toosmall; 3007 __be64 wire_offset; 3008 __be32 *p; 3009 3010 /* In nfsv4, "." and ".." never make it onto the wire.. */ 3011 if (name && isdotent(name, namlen)) { 3012 cd->common.err = nfs_ok; 3013 return 0; 3014 } 3015 3016 if (cd->cookie_offset) { 3017 wire_offset = cpu_to_be64(offset); 3018 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 3019 &wire_offset, 8); 3020 } 3021 3022 p = xdr_reserve_space(xdr, 4); 3023 if (!p) 3024 goto fail; 3025 *p++ = xdr_one; /* mark entry present */ 3026 cookie_offset = xdr->buf->len; 3027 p = xdr_reserve_space(xdr, 3*4 + namlen); 3028 if (!p) 3029 goto fail; 3030 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 3031 p = xdr_encode_array(p, name, namlen); /* name length & name */ 3032 3033 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 3034 switch (nfserr) { 3035 case nfs_ok: 3036 break; 3037 case nfserr_resource: 3038 nfserr = nfserr_toosmall; 3039 goto fail; 3040 case nfserr_noent: 3041 xdr_truncate_encode(xdr, start_offset); 3042 goto skip_entry; 3043 default: 3044 /* 3045 * If the client requested the RDATTR_ERROR attribute, 3046 * we stuff the error code into this attribute 3047 * and continue. If this attribute was not requested, 3048 * then in accordance with the spec, we fail the 3049 * entire READDIR operation(!) 3050 */ 3051 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 3052 goto fail; 3053 p = nfsd4_encode_rdattr_error(xdr, nfserr); 3054 if (p == NULL) { 3055 nfserr = nfserr_toosmall; 3056 goto fail; 3057 } 3058 } 3059 nfserr = nfserr_toosmall; 3060 entry_bytes = xdr->buf->len - start_offset; 3061 if (entry_bytes > cd->rd_maxcount) 3062 goto fail; 3063 cd->rd_maxcount -= entry_bytes; 3064 /* 3065 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3066 * let's always let through the first entry, at least: 3067 */ 3068 if (!cd->rd_dircount) 3069 goto fail; 3070 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3071 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3072 goto fail; 3073 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3074 3075 cd->cookie_offset = cookie_offset; 3076 skip_entry: 3077 cd->common.err = nfs_ok; 3078 return 0; 3079 fail: 3080 xdr_truncate_encode(xdr, start_offset); 3081 cd->common.err = nfserr; 3082 return -EINVAL; 3083 } 3084 3085 static __be32 3086 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3087 { 3088 __be32 *p; 3089 3090 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3091 if (!p) 3092 return nfserr_resource; 3093 *p++ = cpu_to_be32(sid->si_generation); 3094 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3095 sizeof(stateid_opaque_t)); 3096 return 0; 3097 } 3098 3099 static __be32 3100 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3101 { 3102 struct xdr_stream *xdr = &resp->xdr; 3103 __be32 *p; 3104 3105 if (!nfserr) { 3106 p = xdr_reserve_space(xdr, 8); 3107 if (!p) 3108 return nfserr_resource; 3109 *p++ = cpu_to_be32(access->ac_supported); 3110 *p++ = cpu_to_be32(access->ac_resp_access); 3111 } 3112 return nfserr; 3113 } 3114 3115 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3116 { 3117 struct xdr_stream *xdr = &resp->xdr; 3118 __be32 *p; 3119 3120 if (!nfserr) { 3121 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3122 if (!p) 3123 return nfserr_resource; 3124 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3125 NFS4_MAX_SESSIONID_LEN); 3126 *p++ = cpu_to_be32(bcts->dir); 3127 /* Upshifting from TCP to RDMA is not supported */ 3128 *p++ = cpu_to_be32(0); 3129 } 3130 return nfserr; 3131 } 3132 3133 static __be32 3134 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3135 { 3136 struct xdr_stream *xdr = &resp->xdr; 3137 3138 if (!nfserr) 3139 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3140 3141 return nfserr; 3142 } 3143 3144 3145 static __be32 3146 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3147 { 3148 struct xdr_stream *xdr = &resp->xdr; 3149 __be32 *p; 3150 3151 if (!nfserr) { 3152 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3153 if (!p) 3154 return nfserr_resource; 3155 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3156 NFS4_VERIFIER_SIZE); 3157 } 3158 return nfserr; 3159 } 3160 3161 static __be32 3162 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3163 { 3164 struct xdr_stream *xdr = &resp->xdr; 3165 __be32 *p; 3166 3167 if (!nfserr) { 3168 p = xdr_reserve_space(xdr, 20); 3169 if (!p) 3170 return nfserr_resource; 3171 encode_cinfo(p, &create->cr_cinfo); 3172 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3173 create->cr_bmval[1], create->cr_bmval[2]); 3174 } 3175 return nfserr; 3176 } 3177 3178 static __be32 3179 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3180 { 3181 struct svc_fh *fhp = getattr->ga_fhp; 3182 struct xdr_stream *xdr = &resp->xdr; 3183 3184 if (nfserr) 3185 return nfserr; 3186 3187 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3188 getattr->ga_bmval, 3189 resp->rqstp, 0); 3190 return nfserr; 3191 } 3192 3193 static __be32 3194 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3195 { 3196 struct xdr_stream *xdr = &resp->xdr; 3197 struct svc_fh *fhp = *fhpp; 3198 unsigned int len; 3199 __be32 *p; 3200 3201 if (!nfserr) { 3202 len = fhp->fh_handle.fh_size; 3203 p = xdr_reserve_space(xdr, len + 4); 3204 if (!p) 3205 return nfserr_resource; 3206 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3207 } 3208 return nfserr; 3209 } 3210 3211 /* 3212 * Including all fields other than the name, a LOCK4denied structure requires 3213 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3214 */ 3215 static __be32 3216 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3217 { 3218 struct xdr_netobj *conf = &ld->ld_owner; 3219 __be32 *p; 3220 3221 again: 3222 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3223 if (!p) { 3224 /* 3225 * Don't fail to return the result just because we can't 3226 * return the conflicting open: 3227 */ 3228 if (conf->len) { 3229 kfree(conf->data); 3230 conf->len = 0; 3231 conf->data = NULL; 3232 goto again; 3233 } 3234 return nfserr_resource; 3235 } 3236 p = xdr_encode_hyper(p, ld->ld_start); 3237 p = xdr_encode_hyper(p, ld->ld_length); 3238 *p++ = cpu_to_be32(ld->ld_type); 3239 if (conf->len) { 3240 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3241 p = xdr_encode_opaque(p, conf->data, conf->len); 3242 kfree(conf->data); 3243 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3244 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3245 *p++ = cpu_to_be32(0); /* length of owner name */ 3246 } 3247 return nfserr_denied; 3248 } 3249 3250 static __be32 3251 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3252 { 3253 struct xdr_stream *xdr = &resp->xdr; 3254 3255 if (!nfserr) 3256 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3257 else if (nfserr == nfserr_denied) 3258 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3259 3260 return nfserr; 3261 } 3262 3263 static __be32 3264 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3265 { 3266 struct xdr_stream *xdr = &resp->xdr; 3267 3268 if (nfserr == nfserr_denied) 3269 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3270 return nfserr; 3271 } 3272 3273 static __be32 3274 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3275 { 3276 struct xdr_stream *xdr = &resp->xdr; 3277 3278 if (!nfserr) 3279 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3280 3281 return nfserr; 3282 } 3283 3284 3285 static __be32 3286 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3287 { 3288 struct xdr_stream *xdr = &resp->xdr; 3289 __be32 *p; 3290 3291 if (!nfserr) { 3292 p = xdr_reserve_space(xdr, 20); 3293 if (!p) 3294 return nfserr_resource; 3295 p = encode_cinfo(p, &link->li_cinfo); 3296 } 3297 return nfserr; 3298 } 3299 3300 3301 static __be32 3302 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3303 { 3304 struct xdr_stream *xdr = &resp->xdr; 3305 __be32 *p; 3306 3307 if (nfserr) 3308 goto out; 3309 3310 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3311 if (nfserr) 3312 goto out; 3313 p = xdr_reserve_space(xdr, 24); 3314 if (!p) 3315 return nfserr_resource; 3316 p = encode_cinfo(p, &open->op_cinfo); 3317 *p++ = cpu_to_be32(open->op_rflags); 3318 3319 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3320 open->op_bmval[2]); 3321 if (nfserr) 3322 goto out; 3323 3324 p = xdr_reserve_space(xdr, 4); 3325 if (!p) 3326 return nfserr_resource; 3327 3328 *p++ = cpu_to_be32(open->op_delegate_type); 3329 switch (open->op_delegate_type) { 3330 case NFS4_OPEN_DELEGATE_NONE: 3331 break; 3332 case NFS4_OPEN_DELEGATE_READ: 3333 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3334 if (nfserr) 3335 return nfserr; 3336 p = xdr_reserve_space(xdr, 20); 3337 if (!p) 3338 return nfserr_resource; 3339 *p++ = cpu_to_be32(open->op_recall); 3340 3341 /* 3342 * TODO: ACE's in delegations 3343 */ 3344 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3345 *p++ = cpu_to_be32(0); 3346 *p++ = cpu_to_be32(0); 3347 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3348 break; 3349 case NFS4_OPEN_DELEGATE_WRITE: 3350 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3351 if (nfserr) 3352 return nfserr; 3353 p = xdr_reserve_space(xdr, 32); 3354 if (!p) 3355 return nfserr_resource; 3356 *p++ = cpu_to_be32(0); 3357 3358 /* 3359 * TODO: space_limit's in delegations 3360 */ 3361 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3362 *p++ = cpu_to_be32(~(u32)0); 3363 *p++ = cpu_to_be32(~(u32)0); 3364 3365 /* 3366 * TODO: ACE's in delegations 3367 */ 3368 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3369 *p++ = cpu_to_be32(0); 3370 *p++ = cpu_to_be32(0); 3371 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3372 break; 3373 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3374 switch (open->op_why_no_deleg) { 3375 case WND4_CONTENTION: 3376 case WND4_RESOURCE: 3377 p = xdr_reserve_space(xdr, 8); 3378 if (!p) 3379 return nfserr_resource; 3380 *p++ = cpu_to_be32(open->op_why_no_deleg); 3381 /* deleg signaling not supported yet: */ 3382 *p++ = cpu_to_be32(0); 3383 break; 3384 default: 3385 p = xdr_reserve_space(xdr, 4); 3386 if (!p) 3387 return nfserr_resource; 3388 *p++ = cpu_to_be32(open->op_why_no_deleg); 3389 } 3390 break; 3391 default: 3392 BUG(); 3393 } 3394 /* XXX save filehandle here */ 3395 out: 3396 return nfserr; 3397 } 3398 3399 static __be32 3400 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3401 { 3402 struct xdr_stream *xdr = &resp->xdr; 3403 3404 if (!nfserr) 3405 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3406 3407 return nfserr; 3408 } 3409 3410 static __be32 3411 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3412 { 3413 struct xdr_stream *xdr = &resp->xdr; 3414 3415 if (!nfserr) 3416 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3417 3418 return nfserr; 3419 } 3420 3421 static __be32 nfsd4_encode_splice_read( 3422 struct nfsd4_compoundres *resp, 3423 struct nfsd4_read *read, 3424 struct file *file, unsigned long maxcount) 3425 { 3426 struct xdr_stream *xdr = &resp->xdr; 3427 struct xdr_buf *buf = xdr->buf; 3428 u32 eof; 3429 long len; 3430 int space_left; 3431 __be32 nfserr; 3432 __be32 *p = xdr->p - 2; 3433 3434 /* Make sure there will be room for padding if needed */ 3435 if (xdr->end - xdr->p < 1) 3436 return nfserr_resource; 3437 3438 len = maxcount; 3439 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3440 read->rd_offset, &maxcount); 3441 if (nfserr) { 3442 /* 3443 * nfsd_splice_actor may have already messed with the 3444 * page length; reset it so as not to confuse 3445 * xdr_truncate_encode: 3446 */ 3447 buf->page_len = 0; 3448 return nfserr; 3449 } 3450 3451 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3452 d_inode(read->rd_fhp->fh_dentry)->i_size); 3453 3454 *(p++) = htonl(eof); 3455 *(p++) = htonl(maxcount); 3456 3457 buf->page_len = maxcount; 3458 buf->len += maxcount; 3459 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3460 / PAGE_SIZE; 3461 3462 /* Use rest of head for padding and remaining ops: */ 3463 buf->tail[0].iov_base = xdr->p; 3464 buf->tail[0].iov_len = 0; 3465 xdr->iov = buf->tail; 3466 if (maxcount&3) { 3467 int pad = 4 - (maxcount&3); 3468 3469 *(xdr->p++) = 0; 3470 3471 buf->tail[0].iov_base += maxcount&3; 3472 buf->tail[0].iov_len = pad; 3473 buf->len += pad; 3474 } 3475 3476 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3477 buf->buflen - buf->len); 3478 buf->buflen = buf->len + space_left; 3479 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3480 3481 return 0; 3482 } 3483 3484 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3485 struct nfsd4_read *read, 3486 struct file *file, unsigned long maxcount) 3487 { 3488 struct xdr_stream *xdr = &resp->xdr; 3489 u32 eof; 3490 int v; 3491 int starting_len = xdr->buf->len - 8; 3492 long len; 3493 int thislen; 3494 __be32 nfserr; 3495 __be32 tmp; 3496 __be32 *p; 3497 u32 zzz = 0; 3498 int pad; 3499 3500 len = maxcount; 3501 v = 0; 3502 3503 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3504 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3505 WARN_ON_ONCE(!p); 3506 resp->rqstp->rq_vec[v].iov_base = p; 3507 resp->rqstp->rq_vec[v].iov_len = thislen; 3508 v++; 3509 len -= thislen; 3510 3511 while (len) { 3512 thislen = min_t(long, len, PAGE_SIZE); 3513 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3514 WARN_ON_ONCE(!p); 3515 resp->rqstp->rq_vec[v].iov_base = p; 3516 resp->rqstp->rq_vec[v].iov_len = thislen; 3517 v++; 3518 len -= thislen; 3519 } 3520 read->rd_vlen = v; 3521 3522 len = maxcount; 3523 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3524 read->rd_vlen, &maxcount); 3525 if (nfserr) 3526 return nfserr; 3527 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3528 3529 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3530 d_inode(read->rd_fhp->fh_dentry)->i_size); 3531 3532 tmp = htonl(eof); 3533 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3534 tmp = htonl(maxcount); 3535 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3536 3537 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3538 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3539 &zzz, pad); 3540 return 0; 3541 3542 } 3543 3544 static __be32 3545 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3546 struct nfsd4_read *read) 3547 { 3548 unsigned long maxcount; 3549 struct xdr_stream *xdr = &resp->xdr; 3550 struct file *file = read->rd_filp; 3551 int starting_len = xdr->buf->len; 3552 struct raparms *ra = NULL; 3553 __be32 *p; 3554 3555 if (nfserr) 3556 goto out; 3557 3558 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3559 if (!p) { 3560 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3561 nfserr = nfserr_resource; 3562 goto out; 3563 } 3564 if (resp->xdr.buf->page_len && 3565 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3566 WARN_ON_ONCE(1); 3567 nfserr = nfserr_resource; 3568 goto out; 3569 } 3570 xdr_commit_encode(xdr); 3571 3572 maxcount = svc_max_payload(resp->rqstp); 3573 maxcount = min_t(unsigned long, maxcount, 3574 (xdr->buf->buflen - xdr->buf->len)); 3575 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3576 3577 if (read->rd_tmp_file) 3578 ra = nfsd_init_raparms(file); 3579 3580 if (file->f_op->splice_read && 3581 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3582 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3583 else 3584 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3585 3586 if (ra) 3587 nfsd_put_raparams(file, ra); 3588 3589 if (nfserr) 3590 xdr_truncate_encode(xdr, starting_len); 3591 3592 out: 3593 if (file) 3594 fput(file); 3595 return nfserr; 3596 } 3597 3598 static __be32 3599 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3600 { 3601 int maxcount; 3602 __be32 wire_count; 3603 int zero = 0; 3604 struct xdr_stream *xdr = &resp->xdr; 3605 int length_offset = xdr->buf->len; 3606 __be32 *p; 3607 3608 if (nfserr) 3609 return nfserr; 3610 3611 p = xdr_reserve_space(xdr, 4); 3612 if (!p) 3613 return nfserr_resource; 3614 maxcount = PAGE_SIZE; 3615 3616 p = xdr_reserve_space(xdr, maxcount); 3617 if (!p) 3618 return nfserr_resource; 3619 /* 3620 * XXX: By default, vfs_readlink() will truncate symlinks if they 3621 * would overflow the buffer. Is this kosher in NFSv4? If not, one 3622 * easy fix is: if vfs_readlink() precisely fills the buffer, assume 3623 * that truncation occurred, and return NFS4ERR_RESOURCE. 3624 */ 3625 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3626 (char *)p, &maxcount); 3627 if (nfserr == nfserr_isdir) 3628 nfserr = nfserr_inval; 3629 if (nfserr) { 3630 xdr_truncate_encode(xdr, length_offset); 3631 return nfserr; 3632 } 3633 3634 wire_count = htonl(maxcount); 3635 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3636 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3637 if (maxcount & 3) 3638 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3639 &zero, 4 - (maxcount&3)); 3640 return 0; 3641 } 3642 3643 static __be32 3644 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3645 { 3646 int maxcount; 3647 int bytes_left; 3648 loff_t offset; 3649 __be64 wire_offset; 3650 struct xdr_stream *xdr = &resp->xdr; 3651 int starting_len = xdr->buf->len; 3652 __be32 *p; 3653 3654 if (nfserr) 3655 return nfserr; 3656 3657 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3658 if (!p) 3659 return nfserr_resource; 3660 3661 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3662 *p++ = cpu_to_be32(0); 3663 *p++ = cpu_to_be32(0); 3664 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3665 - (char *)resp->xdr.buf->head[0].iov_base; 3666 3667 /* 3668 * Number of bytes left for directory entries allowing for the 3669 * final 8 bytes of the readdir and a following failed op: 3670 */ 3671 bytes_left = xdr->buf->buflen - xdr->buf->len 3672 - COMPOUND_ERR_SLACK_SPACE - 8; 3673 if (bytes_left < 0) { 3674 nfserr = nfserr_resource; 3675 goto err_no_verf; 3676 } 3677 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3678 /* 3679 * Note the rfc defines rd_maxcount as the size of the 3680 * READDIR4resok structure, which includes the verifier above 3681 * and the 8 bytes encoded at the end of this function: 3682 */ 3683 if (maxcount < 16) { 3684 nfserr = nfserr_toosmall; 3685 goto err_no_verf; 3686 } 3687 maxcount = min_t(int, maxcount-16, bytes_left); 3688 3689 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3690 if (!readdir->rd_dircount) 3691 readdir->rd_dircount = INT_MAX; 3692 3693 readdir->xdr = xdr; 3694 readdir->rd_maxcount = maxcount; 3695 readdir->common.err = 0; 3696 readdir->cookie_offset = 0; 3697 3698 offset = readdir->rd_cookie; 3699 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3700 &offset, 3701 &readdir->common, nfsd4_encode_dirent); 3702 if (nfserr == nfs_ok && 3703 readdir->common.err == nfserr_toosmall && 3704 xdr->buf->len == starting_len + 8) { 3705 /* nothing encoded; which limit did we hit?: */ 3706 if (maxcount - 16 < bytes_left) 3707 /* It was the fault of rd_maxcount: */ 3708 nfserr = nfserr_toosmall; 3709 else 3710 /* We ran out of buffer space: */ 3711 nfserr = nfserr_resource; 3712 } 3713 if (nfserr) 3714 goto err_no_verf; 3715 3716 if (readdir->cookie_offset) { 3717 wire_offset = cpu_to_be64(offset); 3718 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3719 &wire_offset, 8); 3720 } 3721 3722 p = xdr_reserve_space(xdr, 8); 3723 if (!p) { 3724 WARN_ON_ONCE(1); 3725 goto err_no_verf; 3726 } 3727 *p++ = 0; /* no more entries */ 3728 *p++ = htonl(readdir->common.err == nfserr_eof); 3729 3730 return 0; 3731 err_no_verf: 3732 xdr_truncate_encode(xdr, starting_len); 3733 return nfserr; 3734 } 3735 3736 static __be32 3737 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3738 { 3739 struct xdr_stream *xdr = &resp->xdr; 3740 __be32 *p; 3741 3742 if (!nfserr) { 3743 p = xdr_reserve_space(xdr, 20); 3744 if (!p) 3745 return nfserr_resource; 3746 p = encode_cinfo(p, &remove->rm_cinfo); 3747 } 3748 return nfserr; 3749 } 3750 3751 static __be32 3752 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3753 { 3754 struct xdr_stream *xdr = &resp->xdr; 3755 __be32 *p; 3756 3757 if (!nfserr) { 3758 p = xdr_reserve_space(xdr, 40); 3759 if (!p) 3760 return nfserr_resource; 3761 p = encode_cinfo(p, &rename->rn_sinfo); 3762 p = encode_cinfo(p, &rename->rn_tinfo); 3763 } 3764 return nfserr; 3765 } 3766 3767 static __be32 3768 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3769 __be32 nfserr, struct svc_export *exp) 3770 { 3771 u32 i, nflavs, supported; 3772 struct exp_flavor_info *flavs; 3773 struct exp_flavor_info def_flavs[2]; 3774 __be32 *p, *flavorsp; 3775 static bool report = true; 3776 3777 if (nfserr) 3778 goto out; 3779 nfserr = nfserr_resource; 3780 if (exp->ex_nflavors) { 3781 flavs = exp->ex_flavors; 3782 nflavs = exp->ex_nflavors; 3783 } else { /* Handling of some defaults in absence of real secinfo: */ 3784 flavs = def_flavs; 3785 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3786 nflavs = 2; 3787 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3788 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3789 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3790 nflavs = 1; 3791 flavs[0].pseudoflavor 3792 = svcauth_gss_flavor(exp->ex_client); 3793 } else { 3794 nflavs = 1; 3795 flavs[0].pseudoflavor 3796 = exp->ex_client->flavour->flavour; 3797 } 3798 } 3799 3800 supported = 0; 3801 p = xdr_reserve_space(xdr, 4); 3802 if (!p) 3803 goto out; 3804 flavorsp = p++; /* to be backfilled later */ 3805 3806 for (i = 0; i < nflavs; i++) { 3807 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3808 struct rpcsec_gss_info info; 3809 3810 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3811 supported++; 3812 p = xdr_reserve_space(xdr, 4 + 4 + 3813 XDR_LEN(info.oid.len) + 4 + 4); 3814 if (!p) 3815 goto out; 3816 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3817 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3818 *p++ = cpu_to_be32(info.qop); 3819 *p++ = cpu_to_be32(info.service); 3820 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3821 supported++; 3822 p = xdr_reserve_space(xdr, 4); 3823 if (!p) 3824 goto out; 3825 *p++ = cpu_to_be32(pf); 3826 } else { 3827 if (report) 3828 pr_warn("NFS: SECINFO: security flavor %u " 3829 "is not supported\n", pf); 3830 } 3831 } 3832 3833 if (nflavs != supported) 3834 report = false; 3835 *flavorsp = htonl(supported); 3836 nfserr = 0; 3837 out: 3838 if (exp) 3839 exp_put(exp); 3840 return nfserr; 3841 } 3842 3843 static __be32 3844 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3845 struct nfsd4_secinfo *secinfo) 3846 { 3847 struct xdr_stream *xdr = &resp->xdr; 3848 3849 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3850 } 3851 3852 static __be32 3853 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3854 struct nfsd4_secinfo_no_name *secinfo) 3855 { 3856 struct xdr_stream *xdr = &resp->xdr; 3857 3858 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3859 } 3860 3861 /* 3862 * The SETATTR encode routine is special -- it always encodes a bitmap, 3863 * regardless of the error status. 3864 */ 3865 static __be32 3866 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3867 { 3868 struct xdr_stream *xdr = &resp->xdr; 3869 __be32 *p; 3870 3871 p = xdr_reserve_space(xdr, 16); 3872 if (!p) 3873 return nfserr_resource; 3874 if (nfserr) { 3875 *p++ = cpu_to_be32(3); 3876 *p++ = cpu_to_be32(0); 3877 *p++ = cpu_to_be32(0); 3878 *p++ = cpu_to_be32(0); 3879 } 3880 else { 3881 *p++ = cpu_to_be32(3); 3882 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3883 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3884 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3885 } 3886 return nfserr; 3887 } 3888 3889 static __be32 3890 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3891 { 3892 struct xdr_stream *xdr = &resp->xdr; 3893 __be32 *p; 3894 3895 if (!nfserr) { 3896 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3897 if (!p) 3898 return nfserr_resource; 3899 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3900 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3901 NFS4_VERIFIER_SIZE); 3902 } 3903 else if (nfserr == nfserr_clid_inuse) { 3904 p = xdr_reserve_space(xdr, 8); 3905 if (!p) 3906 return nfserr_resource; 3907 *p++ = cpu_to_be32(0); 3908 *p++ = cpu_to_be32(0); 3909 } 3910 return nfserr; 3911 } 3912 3913 static __be32 3914 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3915 { 3916 struct xdr_stream *xdr = &resp->xdr; 3917 __be32 *p; 3918 3919 if (!nfserr) { 3920 p = xdr_reserve_space(xdr, 16); 3921 if (!p) 3922 return nfserr_resource; 3923 *p++ = cpu_to_be32(write->wr_bytes_written); 3924 *p++ = cpu_to_be32(write->wr_how_written); 3925 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3926 NFS4_VERIFIER_SIZE); 3927 } 3928 return nfserr; 3929 } 3930 3931 static __be32 3932 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3933 struct nfsd4_exchange_id *exid) 3934 { 3935 struct xdr_stream *xdr = &resp->xdr; 3936 __be32 *p; 3937 char *major_id; 3938 char *server_scope; 3939 int major_id_sz; 3940 int server_scope_sz; 3941 int status = 0; 3942 uint64_t minor_id = 0; 3943 3944 if (nfserr) 3945 return nfserr; 3946 3947 major_id = utsname()->nodename; 3948 major_id_sz = strlen(major_id); 3949 server_scope = utsname()->nodename; 3950 server_scope_sz = strlen(server_scope); 3951 3952 p = xdr_reserve_space(xdr, 3953 8 /* eir_clientid */ + 3954 4 /* eir_sequenceid */ + 3955 4 /* eir_flags */ + 3956 4 /* spr_how */); 3957 if (!p) 3958 return nfserr_resource; 3959 3960 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3961 *p++ = cpu_to_be32(exid->seqid); 3962 *p++ = cpu_to_be32(exid->flags); 3963 3964 *p++ = cpu_to_be32(exid->spa_how); 3965 3966 switch (exid->spa_how) { 3967 case SP4_NONE: 3968 break; 3969 case SP4_MACH_CRED: 3970 /* spo_must_enforce bitmap: */ 3971 status = nfsd4_encode_bitmap(xdr, 3972 exid->spo_must_enforce[0], 3973 exid->spo_must_enforce[1], 3974 exid->spo_must_enforce[2]); 3975 if (status) 3976 goto out; 3977 /* spo_must_allow bitmap: */ 3978 status = nfsd4_encode_bitmap(xdr, 3979 exid->spo_must_allow[0], 3980 exid->spo_must_allow[1], 3981 exid->spo_must_allow[2]); 3982 if (status) 3983 goto out; 3984 break; 3985 default: 3986 WARN_ON_ONCE(1); 3987 } 3988 3989 p = xdr_reserve_space(xdr, 3990 8 /* so_minor_id */ + 3991 4 /* so_major_id.len */ + 3992 (XDR_QUADLEN(major_id_sz) * 4) + 3993 4 /* eir_server_scope.len */ + 3994 (XDR_QUADLEN(server_scope_sz) * 4) + 3995 4 /* eir_server_impl_id.count (0) */); 3996 if (!p) 3997 return nfserr_resource; 3998 3999 /* The server_owner struct */ 4000 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 4001 /* major id */ 4002 p = xdr_encode_opaque(p, major_id, major_id_sz); 4003 4004 /* Server scope */ 4005 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 4006 4007 /* Implementation id */ 4008 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 4009 return 0; 4010 out: 4011 return status; 4012 } 4013 4014 static __be32 4015 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 4016 struct nfsd4_create_session *sess) 4017 { 4018 struct xdr_stream *xdr = &resp->xdr; 4019 __be32 *p; 4020 4021 if (nfserr) 4022 return nfserr; 4023 4024 p = xdr_reserve_space(xdr, 24); 4025 if (!p) 4026 return nfserr_resource; 4027 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 4028 NFS4_MAX_SESSIONID_LEN); 4029 *p++ = cpu_to_be32(sess->seqid); 4030 *p++ = cpu_to_be32(sess->flags); 4031 4032 p = xdr_reserve_space(xdr, 28); 4033 if (!p) 4034 return nfserr_resource; 4035 *p++ = cpu_to_be32(0); /* headerpadsz */ 4036 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 4037 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 4038 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 4039 *p++ = cpu_to_be32(sess->fore_channel.maxops); 4040 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 4041 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 4042 4043 if (sess->fore_channel.nr_rdma_attrs) { 4044 p = xdr_reserve_space(xdr, 4); 4045 if (!p) 4046 return nfserr_resource; 4047 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 4048 } 4049 4050 p = xdr_reserve_space(xdr, 28); 4051 if (!p) 4052 return nfserr_resource; 4053 *p++ = cpu_to_be32(0); /* headerpadsz */ 4054 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 4055 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 4056 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 4057 *p++ = cpu_to_be32(sess->back_channel.maxops); 4058 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 4059 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 4060 4061 if (sess->back_channel.nr_rdma_attrs) { 4062 p = xdr_reserve_space(xdr, 4); 4063 if (!p) 4064 return nfserr_resource; 4065 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4066 } 4067 return 0; 4068 } 4069 4070 static __be32 4071 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4072 struct nfsd4_sequence *seq) 4073 { 4074 struct xdr_stream *xdr = &resp->xdr; 4075 __be32 *p; 4076 4077 if (nfserr) 4078 return nfserr; 4079 4080 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4081 if (!p) 4082 return nfserr_resource; 4083 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4084 NFS4_MAX_SESSIONID_LEN); 4085 *p++ = cpu_to_be32(seq->seqid); 4086 *p++ = cpu_to_be32(seq->slotid); 4087 /* Note slotid's are numbered from zero: */ 4088 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4089 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4090 *p++ = cpu_to_be32(seq->status_flags); 4091 4092 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4093 return 0; 4094 } 4095 4096 static __be32 4097 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4098 struct nfsd4_test_stateid *test_stateid) 4099 { 4100 struct xdr_stream *xdr = &resp->xdr; 4101 struct nfsd4_test_stateid_id *stateid, *next; 4102 __be32 *p; 4103 4104 if (nfserr) 4105 return nfserr; 4106 4107 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4108 if (!p) 4109 return nfserr_resource; 4110 *p++ = htonl(test_stateid->ts_num_ids); 4111 4112 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4113 *p++ = stateid->ts_id_status; 4114 } 4115 4116 return nfserr; 4117 } 4118 4119 #ifdef CONFIG_NFSD_PNFS 4120 static __be32 4121 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4122 struct nfsd4_getdeviceinfo *gdev) 4123 { 4124 struct xdr_stream *xdr = &resp->xdr; 4125 const struct nfsd4_layout_ops *ops; 4126 u32 starting_len = xdr->buf->len, needed_len; 4127 __be32 *p; 4128 4129 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr)); 4130 if (nfserr) 4131 goto out; 4132 4133 nfserr = nfserr_resource; 4134 p = xdr_reserve_space(xdr, 4); 4135 if (!p) 4136 goto out; 4137 4138 *p++ = cpu_to_be32(gdev->gd_layout_type); 4139 4140 /* If maxcount is 0 then just update notifications */ 4141 if (gdev->gd_maxcount != 0) { 4142 ops = nfsd4_layout_ops[gdev->gd_layout_type]; 4143 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4144 if (nfserr) { 4145 /* 4146 * We don't bother to burden the layout drivers with 4147 * enforcing gd_maxcount, just tell the client to 4148 * come back with a bigger buffer if it's not enough. 4149 */ 4150 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4151 goto toosmall; 4152 goto out; 4153 } 4154 } 4155 4156 nfserr = nfserr_resource; 4157 if (gdev->gd_notify_types) { 4158 p = xdr_reserve_space(xdr, 4 + 4); 4159 if (!p) 4160 goto out; 4161 *p++ = cpu_to_be32(1); /* bitmap length */ 4162 *p++ = cpu_to_be32(gdev->gd_notify_types); 4163 } else { 4164 p = xdr_reserve_space(xdr, 4); 4165 if (!p) 4166 goto out; 4167 *p++ = 0; 4168 } 4169 4170 nfserr = 0; 4171 out: 4172 kfree(gdev->gd_device); 4173 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4174 return nfserr; 4175 4176 toosmall: 4177 dprintk("%s: maxcount too small\n", __func__); 4178 needed_len = xdr->buf->len + 4 /* notifications */; 4179 xdr_truncate_encode(xdr, starting_len); 4180 p = xdr_reserve_space(xdr, 4); 4181 if (!p) { 4182 nfserr = nfserr_resource; 4183 } else { 4184 *p++ = cpu_to_be32(needed_len); 4185 nfserr = nfserr_toosmall; 4186 } 4187 goto out; 4188 } 4189 4190 static __be32 4191 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4192 struct nfsd4_layoutget *lgp) 4193 { 4194 struct xdr_stream *xdr = &resp->xdr; 4195 const struct nfsd4_layout_ops *ops; 4196 __be32 *p; 4197 4198 dprintk("%s: err %d\n", __func__, nfserr); 4199 if (nfserr) 4200 goto out; 4201 4202 nfserr = nfserr_resource; 4203 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4204 if (!p) 4205 goto out; 4206 4207 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4208 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4209 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4210 sizeof(stateid_opaque_t)); 4211 4212 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4213 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4214 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4215 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4216 *p++ = cpu_to_be32(lgp->lg_layout_type); 4217 4218 ops = nfsd4_layout_ops[lgp->lg_layout_type]; 4219 nfserr = ops->encode_layoutget(xdr, lgp); 4220 out: 4221 kfree(lgp->lg_content); 4222 return nfserr; 4223 } 4224 4225 static __be32 4226 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4227 struct nfsd4_layoutcommit *lcp) 4228 { 4229 struct xdr_stream *xdr = &resp->xdr; 4230 __be32 *p; 4231 4232 if (nfserr) 4233 return nfserr; 4234 4235 p = xdr_reserve_space(xdr, 4); 4236 if (!p) 4237 return nfserr_resource; 4238 *p++ = cpu_to_be32(lcp->lc_size_chg); 4239 if (lcp->lc_size_chg) { 4240 p = xdr_reserve_space(xdr, 8); 4241 if (!p) 4242 return nfserr_resource; 4243 p = xdr_encode_hyper(p, lcp->lc_newsize); 4244 } 4245 4246 return nfs_ok; 4247 } 4248 4249 static __be32 4250 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4251 struct nfsd4_layoutreturn *lrp) 4252 { 4253 struct xdr_stream *xdr = &resp->xdr; 4254 __be32 *p; 4255 4256 if (nfserr) 4257 return nfserr; 4258 4259 p = xdr_reserve_space(xdr, 4); 4260 if (!p) 4261 return nfserr_resource; 4262 *p++ = cpu_to_be32(lrp->lrs_present); 4263 if (lrp->lrs_present) 4264 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4265 return nfs_ok; 4266 } 4267 #endif /* CONFIG_NFSD_PNFS */ 4268 4269 static __be32 4270 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write) 4271 { 4272 __be32 *p; 4273 4274 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); 4275 if (!p) 4276 return nfserr_resource; 4277 4278 *p++ = cpu_to_be32(0); 4279 p = xdr_encode_hyper(p, write->wr_bytes_written); 4280 *p++ = cpu_to_be32(write->wr_stable_how); 4281 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 4282 NFS4_VERIFIER_SIZE); 4283 return nfs_ok; 4284 } 4285 4286 static __be32 4287 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, 4288 struct nfsd4_copy *copy) 4289 { 4290 __be32 *p; 4291 4292 if (!nfserr) { 4293 nfserr = nfsd42_encode_write_res(resp, ©->cp_res); 4294 if (nfserr) 4295 return nfserr; 4296 4297 p = xdr_reserve_space(&resp->xdr, 4 + 4); 4298 *p++ = cpu_to_be32(copy->cp_consecutive); 4299 *p++ = cpu_to_be32(copy->cp_synchronous); 4300 } 4301 return nfserr; 4302 } 4303 4304 static __be32 4305 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4306 struct nfsd4_seek *seek) 4307 { 4308 __be32 *p; 4309 4310 if (nfserr) 4311 return nfserr; 4312 4313 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4314 *p++ = cpu_to_be32(seek->seek_eof); 4315 p = xdr_encode_hyper(p, seek->seek_pos); 4316 4317 return nfserr; 4318 } 4319 4320 static __be32 4321 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4322 { 4323 return nfserr; 4324 } 4325 4326 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4327 4328 /* 4329 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4330 * since we don't need to filter out obsolete ops as this is 4331 * done in the decoding phase. 4332 */ 4333 static nfsd4_enc nfsd4_enc_ops[] = { 4334 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4335 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4336 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4337 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4338 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4339 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4340 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4341 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4342 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4343 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4344 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4345 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4346 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4347 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4348 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4349 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4350 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4351 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4352 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4353 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4354 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4355 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4356 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4357 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4358 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4359 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4360 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4361 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4362 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4363 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4364 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4365 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4366 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4367 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4368 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4369 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4370 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4371 4372 /* NFSv4.1 operations */ 4373 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4374 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4375 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4376 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4377 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4378 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4379 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4380 #ifdef CONFIG_NFSD_PNFS 4381 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4382 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4383 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4384 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4385 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4386 #else 4387 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4388 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4389 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4390 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4391 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4392 #endif 4393 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4394 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4395 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4396 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4397 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4398 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4399 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4400 4401 /* NFSv4.2 operations */ 4402 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4403 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, 4404 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4405 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4406 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4407 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4408 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4409 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4410 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4411 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4412 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4413 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4414 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4415 }; 4416 4417 /* 4418 * Calculate whether we still have space to encode repsize bytes. 4419 * There are two considerations: 4420 * - For NFS versions >=4.1, the size of the reply must stay within 4421 * session limits 4422 * - For all NFS versions, we must stay within limited preallocated 4423 * buffer space. 4424 * 4425 * This is called before the operation is processed, so can only provide 4426 * an upper estimate. For some nonidempotent operations (such as 4427 * getattr), it's not necessarily a problem if that estimate is wrong, 4428 * as we can fail it after processing without significant side effects. 4429 */ 4430 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4431 { 4432 struct xdr_buf *buf = &resp->rqstp->rq_res; 4433 struct nfsd4_slot *slot = resp->cstate.slot; 4434 4435 if (buf->len + respsize <= buf->buflen) 4436 return nfs_ok; 4437 if (!nfsd4_has_session(&resp->cstate)) 4438 return nfserr_resource; 4439 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4440 WARN_ON_ONCE(1); 4441 return nfserr_rep_too_big_to_cache; 4442 } 4443 return nfserr_rep_too_big; 4444 } 4445 4446 void 4447 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4448 { 4449 struct xdr_stream *xdr = &resp->xdr; 4450 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4451 struct svc_rqst *rqstp = resp->rqstp; 4452 int post_err_offset; 4453 nfsd4_enc encoder; 4454 __be32 *p; 4455 4456 p = xdr_reserve_space(xdr, 8); 4457 if (!p) { 4458 WARN_ON_ONCE(1); 4459 return; 4460 } 4461 *p++ = cpu_to_be32(op->opnum); 4462 post_err_offset = xdr->buf->len; 4463 4464 if (op->opnum == OP_ILLEGAL) 4465 goto status; 4466 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4467 !nfsd4_enc_ops[op->opnum]); 4468 encoder = nfsd4_enc_ops[op->opnum]; 4469 op->status = encoder(resp, op->status, &op->u); 4470 xdr_commit_encode(xdr); 4471 4472 /* nfsd4_check_resp_size guarantees enough room for error status */ 4473 if (!op->status) { 4474 int space_needed = 0; 4475 if (!nfsd4_last_compound_op(rqstp)) 4476 space_needed = COMPOUND_ERR_SLACK_SPACE; 4477 op->status = nfsd4_check_resp_size(resp, space_needed); 4478 } 4479 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4480 struct nfsd4_slot *slot = resp->cstate.slot; 4481 4482 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4483 op->status = nfserr_rep_too_big_to_cache; 4484 else 4485 op->status = nfserr_rep_too_big; 4486 } 4487 if (op->status == nfserr_resource || 4488 op->status == nfserr_rep_too_big || 4489 op->status == nfserr_rep_too_big_to_cache) { 4490 /* 4491 * The operation may have already been encoded or 4492 * partially encoded. No op returns anything additional 4493 * in the case of one of these three errors, so we can 4494 * just truncate back to after the status. But it's a 4495 * bug if we had to do this on a non-idempotent op: 4496 */ 4497 warn_on_nonidempotent_op(op); 4498 xdr_truncate_encode(xdr, post_err_offset); 4499 } 4500 if (so) { 4501 int len = xdr->buf->len - post_err_offset; 4502 4503 so->so_replay.rp_status = op->status; 4504 so->so_replay.rp_buflen = len; 4505 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4506 so->so_replay.rp_buf, len); 4507 } 4508 status: 4509 /* Note that op->status is already in network byte order: */ 4510 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4511 } 4512 4513 /* 4514 * Encode the reply stored in the stateowner reply cache 4515 * 4516 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4517 * previously sent already encoded operation. 4518 */ 4519 void 4520 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4521 { 4522 __be32 *p; 4523 struct nfs4_replay *rp = op->replay; 4524 4525 BUG_ON(!rp); 4526 4527 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4528 if (!p) { 4529 WARN_ON_ONCE(1); 4530 return; 4531 } 4532 *p++ = cpu_to_be32(op->opnum); 4533 *p++ = rp->rp_status; /* already xdr'ed */ 4534 4535 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4536 } 4537 4538 int 4539 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) 4540 { 4541 return xdr_ressize_check(rqstp, p); 4542 } 4543 4544 void nfsd4_release_compoundargs(struct svc_rqst *rqstp) 4545 { 4546 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4547 4548 if (args->ops != args->iops) { 4549 kfree(args->ops); 4550 args->ops = args->iops; 4551 } 4552 kfree(args->tmpp); 4553 args->tmpp = NULL; 4554 while (args->to_free) { 4555 struct svcxdr_tmpbuf *tb = args->to_free; 4556 args->to_free = tb->next; 4557 kfree(tb); 4558 } 4559 } 4560 4561 int 4562 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) 4563 { 4564 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4565 4566 if (rqstp->rq_arg.head[0].iov_len % 4) { 4567 /* client is nuts */ 4568 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4569 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4570 return 0; 4571 } 4572 args->p = p; 4573 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4574 args->pagelist = rqstp->rq_arg.pages; 4575 args->pagelen = rqstp->rq_arg.page_len; 4576 args->tmpp = NULL; 4577 args->to_free = NULL; 4578 args->ops = args->iops; 4579 args->rqstp = rqstp; 4580 4581 return !nfsd4_decode_compound(args); 4582 } 4583 4584 int 4585 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) 4586 { 4587 /* 4588 * All that remains is to write the tag and operation count... 4589 */ 4590 struct nfsd4_compoundres *resp = rqstp->rq_resp; 4591 struct xdr_buf *buf = resp->xdr.buf; 4592 4593 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4594 buf->tail[0].iov_len); 4595 4596 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4597 4598 p = resp->tagp; 4599 *p++ = htonl(resp->taglen); 4600 memcpy(p, resp->tag, resp->taglen); 4601 p += XDR_QUADLEN(resp->taglen); 4602 *p++ = htonl(resp->opcnt); 4603 4604 nfsd4_sequence_done(resp); 4605 return 1; 4606 } 4607 4608 /* 4609 * Local variables: 4610 * c-basic-offset: 8 4611 * End: 4612 */ 4613