1 /* 2 * Server-side XDR for NFSv4 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <linux/file.h> 37 #include <linux/slab.h> 38 #include <linux/namei.h> 39 #include <linux/statfs.h> 40 #include <linux/utsname.h> 41 #include <linux/pagemap.h> 42 #include <linux/sunrpc/svcauth_gss.h> 43 44 #include "idmap.h" 45 #include "acl.h" 46 #include "xdr4.h" 47 #include "vfs.h" 48 #include "state.h" 49 #include "cache.h" 50 #include "netns.h" 51 #include "pnfs.h" 52 53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 54 #include <linux/security.h> 55 #endif 56 57 58 #define NFSDDBG_FACILITY NFSDDBG_XDR 59 60 /* 61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 62 * directory in order to indicate to the client that a filesystem boundary is present 63 * We use a fixed fsid for a referral 64 */ 65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 67 68 static __be32 69 check_filename(char *str, int len) 70 { 71 int i; 72 73 if (len == 0) 74 return nfserr_inval; 75 if (isdotent(str, len)) 76 return nfserr_badname; 77 for (i = 0; i < len; i++) 78 if (str[i] == '/') 79 return nfserr_badname; 80 return 0; 81 } 82 83 #define DECODE_HEAD \ 84 __be32 *p; \ 85 __be32 status 86 #define DECODE_TAIL \ 87 status = 0; \ 88 out: \ 89 return status; \ 90 xdr_error: \ 91 dprintk("NFSD: xdr error (%s:%d)\n", \ 92 __FILE__, __LINE__); \ 93 status = nfserr_bad_xdr; \ 94 goto out 95 96 #define READMEM(x,nbytes) do { \ 97 x = (char *)p; \ 98 p += XDR_QUADLEN(nbytes); \ 99 } while (0) 100 #define SAVEMEM(x,nbytes) do { \ 101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 102 savemem(argp, p, nbytes) : \ 103 (char *)p)) { \ 104 dprintk("NFSD: xdr error (%s:%d)\n", \ 105 __FILE__, __LINE__); \ 106 goto xdr_error; \ 107 } \ 108 p += XDR_QUADLEN(nbytes); \ 109 } while (0) 110 #define COPYMEM(x,nbytes) do { \ 111 memcpy((x), p, nbytes); \ 112 p += XDR_QUADLEN(nbytes); \ 113 } while (0) 114 115 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 116 #define READ_BUF(nbytes) do { \ 117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 118 p = argp->p; \ 119 argp->p += XDR_QUADLEN(nbytes); \ 120 } else if (!(p = read_buf(argp, nbytes))) { \ 121 dprintk("NFSD: xdr error (%s:%d)\n", \ 122 __FILE__, __LINE__); \ 123 goto xdr_error; \ 124 } \ 125 } while (0) 126 127 static void next_decode_page(struct nfsd4_compoundargs *argp) 128 { 129 argp->p = page_address(argp->pagelist[0]); 130 argp->pagelist++; 131 if (argp->pagelen < PAGE_SIZE) { 132 argp->end = argp->p + (argp->pagelen>>2); 133 argp->pagelen = 0; 134 } else { 135 argp->end = argp->p + (PAGE_SIZE>>2); 136 argp->pagelen -= PAGE_SIZE; 137 } 138 } 139 140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 141 { 142 /* We want more bytes than seem to be available. 143 * Maybe we need a new page, maybe we have just run out 144 */ 145 unsigned int avail = (char *)argp->end - (char *)argp->p; 146 __be32 *p; 147 if (avail + argp->pagelen < nbytes) 148 return NULL; 149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 150 return NULL; 151 /* ok, we can do it with the current plus the next page */ 152 if (nbytes <= sizeof(argp->tmp)) 153 p = argp->tmp; 154 else { 155 kfree(argp->tmpp); 156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 157 if (!p) 158 return NULL; 159 160 } 161 /* 162 * The following memcpy is safe because read_buf is always 163 * called with nbytes > avail, and the two cases above both 164 * guarantee p points to at least nbytes bytes. 165 */ 166 memcpy(p, argp->p, avail); 167 next_decode_page(argp); 168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 169 argp->p += XDR_QUADLEN(nbytes - avail); 170 return p; 171 } 172 173 static int zero_clientid(clientid_t *clid) 174 { 175 return (clid->cl_boot == 0) && (clid->cl_id == 0); 176 } 177 178 /** 179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing 180 * @argp: NFSv4 compound argument structure 181 * @p: pointer to be freed (with kfree()) 182 * 183 * Marks @p to be freed when processing the compound operation 184 * described in @argp finishes. 185 */ 186 static void * 187 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) 188 { 189 struct svcxdr_tmpbuf *tb; 190 191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); 192 if (!tb) 193 return NULL; 194 tb->next = argp->to_free; 195 argp->to_free = tb; 196 return tb->buf; 197 } 198 199 /* 200 * For xdr strings that need to be passed to other kernel api's 201 * as null-terminated strings. 202 * 203 * Note null-terminating in place usually isn't safe since the 204 * buffer might end on a page boundary. 205 */ 206 static char * 207 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) 208 { 209 char *p = svcxdr_tmpalloc(argp, len + 1); 210 211 if (!p) 212 return NULL; 213 memcpy(p, buf, len); 214 p[len] = '\0'; 215 return p; 216 } 217 218 /** 219 * savemem - duplicate a chunk of memory for later processing 220 * @argp: NFSv4 compound argument structure to be freed with 221 * @p: pointer to be duplicated 222 * @nbytes: length to be duplicated 223 * 224 * Returns a pointer to a copy of @nbytes bytes of memory at @p 225 * that are preserved until processing of the NFSv4 compound 226 * operation described by @argp finishes. 227 */ 228 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 229 { 230 void *ret; 231 232 ret = svcxdr_tmpalloc(argp, nbytes); 233 if (!ret) 234 return NULL; 235 memcpy(ret, p, nbytes); 236 return ret; 237 } 238 239 /* 240 * We require the high 32 bits of 'seconds' to be 0, and 241 * we ignore all 32 bits of 'nseconds'. 242 */ 243 static __be32 244 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv) 245 { 246 DECODE_HEAD; 247 u64 sec; 248 249 READ_BUF(12); 250 p = xdr_decode_hyper(p, &sec); 251 tv->tv_sec = sec; 252 tv->tv_nsec = be32_to_cpup(p++); 253 if (tv->tv_nsec >= (u32)1000000000) 254 return nfserr_inval; 255 256 DECODE_TAIL; 257 } 258 259 static __be32 260 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 261 { 262 u32 bmlen; 263 DECODE_HEAD; 264 265 bmval[0] = 0; 266 bmval[1] = 0; 267 bmval[2] = 0; 268 269 READ_BUF(4); 270 bmlen = be32_to_cpup(p++); 271 if (bmlen > 1000) 272 goto xdr_error; 273 274 READ_BUF(bmlen << 2); 275 if (bmlen > 0) 276 bmval[0] = be32_to_cpup(p++); 277 if (bmlen > 1) 278 bmval[1] = be32_to_cpup(p++); 279 if (bmlen > 2) 280 bmval[2] = be32_to_cpup(p++); 281 282 DECODE_TAIL; 283 } 284 285 static __be32 286 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 287 struct iattr *iattr, struct nfs4_acl **acl, 288 struct xdr_netobj *label) 289 { 290 int expected_len, len = 0; 291 u32 dummy32; 292 char *buf; 293 294 DECODE_HEAD; 295 iattr->ia_valid = 0; 296 if ((status = nfsd4_decode_bitmap(argp, bmval))) 297 return status; 298 299 READ_BUF(4); 300 expected_len = be32_to_cpup(p++); 301 302 if (bmval[0] & FATTR4_WORD0_SIZE) { 303 READ_BUF(8); 304 len += 8; 305 p = xdr_decode_hyper(p, &iattr->ia_size); 306 iattr->ia_valid |= ATTR_SIZE; 307 } 308 if (bmval[0] & FATTR4_WORD0_ACL) { 309 u32 nace; 310 struct nfs4_ace *ace; 311 312 READ_BUF(4); len += 4; 313 nace = be32_to_cpup(p++); 314 315 if (nace > NFS4_ACL_MAX) 316 return nfserr_fbig; 317 318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); 319 if (*acl == NULL) 320 return nfserr_jukebox; 321 322 (*acl)->naces = nace; 323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 324 READ_BUF(16); len += 16; 325 ace->type = be32_to_cpup(p++); 326 ace->flag = be32_to_cpup(p++); 327 ace->access_mask = be32_to_cpup(p++); 328 dummy32 = be32_to_cpup(p++); 329 READ_BUF(dummy32); 330 len += XDR_QUADLEN(dummy32) << 2; 331 READMEM(buf, dummy32); 332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 333 status = nfs_ok; 334 if (ace->whotype != NFS4_ACL_WHO_NAMED) 335 ; 336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 337 status = nfsd_map_name_to_gid(argp->rqstp, 338 buf, dummy32, &ace->who_gid); 339 else 340 status = nfsd_map_name_to_uid(argp->rqstp, 341 buf, dummy32, &ace->who_uid); 342 if (status) 343 return status; 344 } 345 } else 346 *acl = NULL; 347 if (bmval[1] & FATTR4_WORD1_MODE) { 348 READ_BUF(4); 349 len += 4; 350 iattr->ia_mode = be32_to_cpup(p++); 351 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 352 iattr->ia_valid |= ATTR_MODE; 353 } 354 if (bmval[1] & FATTR4_WORD1_OWNER) { 355 READ_BUF(4); 356 len += 4; 357 dummy32 = be32_to_cpup(p++); 358 READ_BUF(dummy32); 359 len += (XDR_QUADLEN(dummy32) << 2); 360 READMEM(buf, dummy32); 361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 362 return status; 363 iattr->ia_valid |= ATTR_UID; 364 } 365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 366 READ_BUF(4); 367 len += 4; 368 dummy32 = be32_to_cpup(p++); 369 READ_BUF(dummy32); 370 len += (XDR_QUADLEN(dummy32) << 2); 371 READMEM(buf, dummy32); 372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 373 return status; 374 iattr->ia_valid |= ATTR_GID; 375 } 376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 377 READ_BUF(4); 378 len += 4; 379 dummy32 = be32_to_cpup(p++); 380 switch (dummy32) { 381 case NFS4_SET_TO_CLIENT_TIME: 382 len += 12; 383 status = nfsd4_decode_time(argp, &iattr->ia_atime); 384 if (status) 385 return status; 386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 387 break; 388 case NFS4_SET_TO_SERVER_TIME: 389 iattr->ia_valid |= ATTR_ATIME; 390 break; 391 default: 392 goto xdr_error; 393 } 394 } 395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 396 READ_BUF(4); 397 len += 4; 398 dummy32 = be32_to_cpup(p++); 399 switch (dummy32) { 400 case NFS4_SET_TO_CLIENT_TIME: 401 len += 12; 402 status = nfsd4_decode_time(argp, &iattr->ia_mtime); 403 if (status) 404 return status; 405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 406 break; 407 case NFS4_SET_TO_SERVER_TIME: 408 iattr->ia_valid |= ATTR_MTIME; 409 break; 410 default: 411 goto xdr_error; 412 } 413 } 414 415 label->len = 0; 416 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { 418 READ_BUF(4); 419 len += 4; 420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ 421 READ_BUF(4); 422 len += 4; 423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ 424 READ_BUF(4); 425 len += 4; 426 dummy32 = be32_to_cpup(p++); 427 READ_BUF(dummy32); 428 if (dummy32 > NFS4_MAXLABELLEN) 429 return nfserr_badlabel; 430 len += (XDR_QUADLEN(dummy32) << 2); 431 READMEM(buf, dummy32); 432 label->len = dummy32; 433 label->data = svcxdr_dupstr(argp, buf, dummy32); 434 if (!label->data) 435 return nfserr_jukebox; 436 } 437 #endif 438 439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 442 READ_BUF(expected_len - len); 443 else if (len != expected_len) 444 goto xdr_error; 445 446 DECODE_TAIL; 447 } 448 449 static __be32 450 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 451 { 452 DECODE_HEAD; 453 454 READ_BUF(sizeof(stateid_t)); 455 sid->si_generation = be32_to_cpup(p++); 456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 457 458 DECODE_TAIL; 459 } 460 461 static __be32 462 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 463 { 464 DECODE_HEAD; 465 466 READ_BUF(4); 467 access->ac_req_access = be32_to_cpup(p++); 468 469 DECODE_TAIL; 470 } 471 472 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 473 { 474 DECODE_HEAD; 475 u32 dummy, uid, gid; 476 char *machine_name; 477 int i; 478 int nr_secflavs; 479 480 /* callback_sec_params4 */ 481 READ_BUF(4); 482 nr_secflavs = be32_to_cpup(p++); 483 if (nr_secflavs) 484 cbs->flavor = (u32)(-1); 485 else 486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */ 487 cbs->flavor = 0; 488 for (i = 0; i < nr_secflavs; ++i) { 489 READ_BUF(4); 490 dummy = be32_to_cpup(p++); 491 switch (dummy) { 492 case RPC_AUTH_NULL: 493 /* Nothing to read */ 494 if (cbs->flavor == (u32)(-1)) 495 cbs->flavor = RPC_AUTH_NULL; 496 break; 497 case RPC_AUTH_UNIX: 498 READ_BUF(8); 499 /* stamp */ 500 dummy = be32_to_cpup(p++); 501 502 /* machine name */ 503 dummy = be32_to_cpup(p++); 504 READ_BUF(dummy); 505 SAVEMEM(machine_name, dummy); 506 507 /* uid, gid */ 508 READ_BUF(8); 509 uid = be32_to_cpup(p++); 510 gid = be32_to_cpup(p++); 511 512 /* more gids */ 513 READ_BUF(4); 514 dummy = be32_to_cpup(p++); 515 READ_BUF(dummy * 4); 516 if (cbs->flavor == (u32)(-1)) { 517 kuid_t kuid = make_kuid(&init_user_ns, uid); 518 kgid_t kgid = make_kgid(&init_user_ns, gid); 519 if (uid_valid(kuid) && gid_valid(kgid)) { 520 cbs->uid = kuid; 521 cbs->gid = kgid; 522 cbs->flavor = RPC_AUTH_UNIX; 523 } else { 524 dprintk("RPC_AUTH_UNIX with invalid" 525 "uid or gid ignoring!\n"); 526 } 527 } 528 break; 529 case RPC_AUTH_GSS: 530 dprintk("RPC_AUTH_GSS callback secflavor " 531 "not supported!\n"); 532 READ_BUF(8); 533 /* gcbp_service */ 534 dummy = be32_to_cpup(p++); 535 /* gcbp_handle_from_server */ 536 dummy = be32_to_cpup(p++); 537 READ_BUF(dummy); 538 p += XDR_QUADLEN(dummy); 539 /* gcbp_handle_from_client */ 540 READ_BUF(4); 541 dummy = be32_to_cpup(p++); 542 READ_BUF(dummy); 543 break; 544 default: 545 dprintk("Illegal callback secflavor\n"); 546 return nfserr_inval; 547 } 548 } 549 DECODE_TAIL; 550 } 551 552 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 553 { 554 DECODE_HEAD; 555 556 READ_BUF(4); 557 bc->bc_cb_program = be32_to_cpup(p++); 558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 559 560 DECODE_TAIL; 561 } 562 563 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 564 { 565 DECODE_HEAD; 566 567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 569 bcts->dir = be32_to_cpup(p++); 570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 571 * could help us figure out we should be using it. */ 572 DECODE_TAIL; 573 } 574 575 static __be32 576 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 577 { 578 DECODE_HEAD; 579 580 READ_BUF(4); 581 close->cl_seqid = be32_to_cpup(p++); 582 return nfsd4_decode_stateid(argp, &close->cl_stateid); 583 584 DECODE_TAIL; 585 } 586 587 588 static __be32 589 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 590 { 591 DECODE_HEAD; 592 593 READ_BUF(12); 594 p = xdr_decode_hyper(p, &commit->co_offset); 595 commit->co_count = be32_to_cpup(p++); 596 597 DECODE_TAIL; 598 } 599 600 static __be32 601 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 602 { 603 DECODE_HEAD; 604 605 READ_BUF(4); 606 create->cr_type = be32_to_cpup(p++); 607 switch (create->cr_type) { 608 case NF4LNK: 609 READ_BUF(4); 610 create->cr_datalen = be32_to_cpup(p++); 611 READ_BUF(create->cr_datalen); 612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); 613 if (!create->cr_data) 614 return nfserr_jukebox; 615 break; 616 case NF4BLK: 617 case NF4CHR: 618 READ_BUF(8); 619 create->cr_specdata1 = be32_to_cpup(p++); 620 create->cr_specdata2 = be32_to_cpup(p++); 621 break; 622 case NF4SOCK: 623 case NF4FIFO: 624 case NF4DIR: 625 default: 626 break; 627 } 628 629 READ_BUF(4); 630 create->cr_namelen = be32_to_cpup(p++); 631 READ_BUF(create->cr_namelen); 632 SAVEMEM(create->cr_name, create->cr_namelen); 633 if ((status = check_filename(create->cr_name, create->cr_namelen))) 634 return status; 635 636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 637 &create->cr_acl, &create->cr_label); 638 if (status) 639 goto out; 640 641 DECODE_TAIL; 642 } 643 644 static inline __be32 645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 646 { 647 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 648 } 649 650 static inline __be32 651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 652 { 653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 654 } 655 656 static __be32 657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 658 { 659 DECODE_HEAD; 660 661 READ_BUF(4); 662 link->li_namelen = be32_to_cpup(p++); 663 READ_BUF(link->li_namelen); 664 SAVEMEM(link->li_name, link->li_namelen); 665 if ((status = check_filename(link->li_name, link->li_namelen))) 666 return status; 667 668 DECODE_TAIL; 669 } 670 671 static __be32 672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 673 { 674 DECODE_HEAD; 675 676 /* 677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 678 */ 679 READ_BUF(28); 680 lock->lk_type = be32_to_cpup(p++); 681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 682 goto xdr_error; 683 lock->lk_reclaim = be32_to_cpup(p++); 684 p = xdr_decode_hyper(p, &lock->lk_offset); 685 p = xdr_decode_hyper(p, &lock->lk_length); 686 lock->lk_is_new = be32_to_cpup(p++); 687 688 if (lock->lk_is_new) { 689 READ_BUF(4); 690 lock->lk_new_open_seqid = be32_to_cpup(p++); 691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 692 if (status) 693 return status; 694 READ_BUF(8 + sizeof(clientid_t)); 695 lock->lk_new_lock_seqid = be32_to_cpup(p++); 696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 697 lock->lk_new_owner.len = be32_to_cpup(p++); 698 READ_BUF(lock->lk_new_owner.len); 699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 700 } else { 701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 702 if (status) 703 return status; 704 READ_BUF(4); 705 lock->lk_old_lock_seqid = be32_to_cpup(p++); 706 } 707 708 DECODE_TAIL; 709 } 710 711 static __be32 712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 713 { 714 DECODE_HEAD; 715 716 READ_BUF(32); 717 lockt->lt_type = be32_to_cpup(p++); 718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 719 goto xdr_error; 720 p = xdr_decode_hyper(p, &lockt->lt_offset); 721 p = xdr_decode_hyper(p, &lockt->lt_length); 722 COPYMEM(&lockt->lt_clientid, 8); 723 lockt->lt_owner.len = be32_to_cpup(p++); 724 READ_BUF(lockt->lt_owner.len); 725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 726 727 DECODE_TAIL; 728 } 729 730 static __be32 731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 732 { 733 DECODE_HEAD; 734 735 READ_BUF(8); 736 locku->lu_type = be32_to_cpup(p++); 737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 738 goto xdr_error; 739 locku->lu_seqid = be32_to_cpup(p++); 740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 741 if (status) 742 return status; 743 READ_BUF(16); 744 p = xdr_decode_hyper(p, &locku->lu_offset); 745 p = xdr_decode_hyper(p, &locku->lu_length); 746 747 DECODE_TAIL; 748 } 749 750 static __be32 751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 752 { 753 DECODE_HEAD; 754 755 READ_BUF(4); 756 lookup->lo_len = be32_to_cpup(p++); 757 READ_BUF(lookup->lo_len); 758 SAVEMEM(lookup->lo_name, lookup->lo_len); 759 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 760 return status; 761 762 DECODE_TAIL; 763 } 764 765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 766 { 767 __be32 *p; 768 u32 w; 769 770 READ_BUF(4); 771 w = be32_to_cpup(p++); 772 *share_access = w & NFS4_SHARE_ACCESS_MASK; 773 *deleg_want = w & NFS4_SHARE_WANT_MASK; 774 if (deleg_when) 775 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 776 777 switch (w & NFS4_SHARE_ACCESS_MASK) { 778 case NFS4_SHARE_ACCESS_READ: 779 case NFS4_SHARE_ACCESS_WRITE: 780 case NFS4_SHARE_ACCESS_BOTH: 781 break; 782 default: 783 return nfserr_bad_xdr; 784 } 785 w &= ~NFS4_SHARE_ACCESS_MASK; 786 if (!w) 787 return nfs_ok; 788 if (!argp->minorversion) 789 return nfserr_bad_xdr; 790 switch (w & NFS4_SHARE_WANT_MASK) { 791 case NFS4_SHARE_WANT_NO_PREFERENCE: 792 case NFS4_SHARE_WANT_READ_DELEG: 793 case NFS4_SHARE_WANT_WRITE_DELEG: 794 case NFS4_SHARE_WANT_ANY_DELEG: 795 case NFS4_SHARE_WANT_NO_DELEG: 796 case NFS4_SHARE_WANT_CANCEL: 797 break; 798 default: 799 return nfserr_bad_xdr; 800 } 801 w &= ~NFS4_SHARE_WANT_MASK; 802 if (!w) 803 return nfs_ok; 804 805 if (!deleg_when) /* open_downgrade */ 806 return nfserr_inval; 807 switch (w) { 808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 812 return nfs_ok; 813 } 814 xdr_error: 815 return nfserr_bad_xdr; 816 } 817 818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 819 { 820 __be32 *p; 821 822 READ_BUF(4); 823 *x = be32_to_cpup(p++); 824 /* Note: unlinke access bits, deny bits may be zero. */ 825 if (*x & ~NFS4_SHARE_DENY_BOTH) 826 return nfserr_bad_xdr; 827 return nfs_ok; 828 xdr_error: 829 return nfserr_bad_xdr; 830 } 831 832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 833 { 834 __be32 *p; 835 836 READ_BUF(4); 837 o->len = be32_to_cpup(p++); 838 839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 840 return nfserr_bad_xdr; 841 842 READ_BUF(o->len); 843 SAVEMEM(o->data, o->len); 844 return nfs_ok; 845 xdr_error: 846 return nfserr_bad_xdr; 847 } 848 849 static __be32 850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 851 { 852 DECODE_HEAD; 853 u32 dummy; 854 855 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 856 open->op_iattr.ia_valid = 0; 857 open->op_openowner = NULL; 858 859 open->op_xdr_error = 0; 860 /* seqid, share_access, share_deny, clientid, ownerlen */ 861 READ_BUF(4); 862 open->op_seqid = be32_to_cpup(p++); 863 /* decode, yet ignore deleg_when until supported */ 864 status = nfsd4_decode_share_access(argp, &open->op_share_access, 865 &open->op_deleg_want, &dummy); 866 if (status) 867 goto xdr_error; 868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 869 if (status) 870 goto xdr_error; 871 READ_BUF(sizeof(clientid_t)); 872 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 873 status = nfsd4_decode_opaque(argp, &open->op_owner); 874 if (status) 875 goto xdr_error; 876 READ_BUF(4); 877 open->op_create = be32_to_cpup(p++); 878 switch (open->op_create) { 879 case NFS4_OPEN_NOCREATE: 880 break; 881 case NFS4_OPEN_CREATE: 882 READ_BUF(4); 883 open->op_createmode = be32_to_cpup(p++); 884 switch (open->op_createmode) { 885 case NFS4_CREATE_UNCHECKED: 886 case NFS4_CREATE_GUARDED: 887 status = nfsd4_decode_fattr(argp, open->op_bmval, 888 &open->op_iattr, &open->op_acl, &open->op_label); 889 if (status) 890 goto out; 891 break; 892 case NFS4_CREATE_EXCLUSIVE: 893 READ_BUF(NFS4_VERIFIER_SIZE); 894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 895 break; 896 case NFS4_CREATE_EXCLUSIVE4_1: 897 if (argp->minorversion < 1) 898 goto xdr_error; 899 READ_BUF(NFS4_VERIFIER_SIZE); 900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 901 status = nfsd4_decode_fattr(argp, open->op_bmval, 902 &open->op_iattr, &open->op_acl, &open->op_label); 903 if (status) 904 goto out; 905 break; 906 default: 907 goto xdr_error; 908 } 909 break; 910 default: 911 goto xdr_error; 912 } 913 914 /* open_claim */ 915 READ_BUF(4); 916 open->op_claim_type = be32_to_cpup(p++); 917 switch (open->op_claim_type) { 918 case NFS4_OPEN_CLAIM_NULL: 919 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 920 READ_BUF(4); 921 open->op_fname.len = be32_to_cpup(p++); 922 READ_BUF(open->op_fname.len); 923 SAVEMEM(open->op_fname.data, open->op_fname.len); 924 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 925 return status; 926 break; 927 case NFS4_OPEN_CLAIM_PREVIOUS: 928 READ_BUF(4); 929 open->op_delegate_type = be32_to_cpup(p++); 930 break; 931 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 933 if (status) 934 return status; 935 READ_BUF(4); 936 open->op_fname.len = be32_to_cpup(p++); 937 READ_BUF(open->op_fname.len); 938 SAVEMEM(open->op_fname.data, open->op_fname.len); 939 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 940 return status; 941 break; 942 case NFS4_OPEN_CLAIM_FH: 943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 944 if (argp->minorversion < 1) 945 goto xdr_error; 946 /* void */ 947 break; 948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 949 if (argp->minorversion < 1) 950 goto xdr_error; 951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 952 if (status) 953 return status; 954 break; 955 default: 956 goto xdr_error; 957 } 958 959 DECODE_TAIL; 960 } 961 962 static __be32 963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 964 { 965 DECODE_HEAD; 966 967 if (argp->minorversion >= 1) 968 return nfserr_notsupp; 969 970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 971 if (status) 972 return status; 973 READ_BUF(4); 974 open_conf->oc_seqid = be32_to_cpup(p++); 975 976 DECODE_TAIL; 977 } 978 979 static __be32 980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 981 { 982 DECODE_HEAD; 983 984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 985 if (status) 986 return status; 987 READ_BUF(4); 988 open_down->od_seqid = be32_to_cpup(p++); 989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 990 &open_down->od_deleg_want, NULL); 991 if (status) 992 return status; 993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 994 if (status) 995 return status; 996 DECODE_TAIL; 997 } 998 999 static __be32 1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 1001 { 1002 DECODE_HEAD; 1003 1004 READ_BUF(4); 1005 putfh->pf_fhlen = be32_to_cpup(p++); 1006 if (putfh->pf_fhlen > NFS4_FHSIZE) 1007 goto xdr_error; 1008 READ_BUF(putfh->pf_fhlen); 1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 1010 1011 DECODE_TAIL; 1012 } 1013 1014 static __be32 1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) 1016 { 1017 if (argp->minorversion == 0) 1018 return nfs_ok; 1019 return nfserr_notsupp; 1020 } 1021 1022 static __be32 1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 1024 { 1025 DECODE_HEAD; 1026 1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 1028 if (status) 1029 return status; 1030 READ_BUF(12); 1031 p = xdr_decode_hyper(p, &read->rd_offset); 1032 read->rd_length = be32_to_cpup(p++); 1033 1034 DECODE_TAIL; 1035 } 1036 1037 static __be32 1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 1039 { 1040 DECODE_HEAD; 1041 1042 READ_BUF(24); 1043 p = xdr_decode_hyper(p, &readdir->rd_cookie); 1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 1045 readdir->rd_dircount = be32_to_cpup(p++); 1046 readdir->rd_maxcount = be32_to_cpup(p++); 1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 1048 goto out; 1049 1050 DECODE_TAIL; 1051 } 1052 1053 static __be32 1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 1055 { 1056 DECODE_HEAD; 1057 1058 READ_BUF(4); 1059 remove->rm_namelen = be32_to_cpup(p++); 1060 READ_BUF(remove->rm_namelen); 1061 SAVEMEM(remove->rm_name, remove->rm_namelen); 1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 1063 return status; 1064 1065 DECODE_TAIL; 1066 } 1067 1068 static __be32 1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 1070 { 1071 DECODE_HEAD; 1072 1073 READ_BUF(4); 1074 rename->rn_snamelen = be32_to_cpup(p++); 1075 READ_BUF(rename->rn_snamelen); 1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1077 READ_BUF(4); 1078 rename->rn_tnamelen = be32_to_cpup(p++); 1079 READ_BUF(rename->rn_tnamelen); 1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1082 return status; 1083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1084 return status; 1085 1086 DECODE_TAIL; 1087 } 1088 1089 static __be32 1090 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1091 { 1092 DECODE_HEAD; 1093 1094 if (argp->minorversion >= 1) 1095 return nfserr_notsupp; 1096 1097 READ_BUF(sizeof(clientid_t)); 1098 COPYMEM(clientid, sizeof(clientid_t)); 1099 1100 DECODE_TAIL; 1101 } 1102 1103 static __be32 1104 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1105 struct nfsd4_secinfo *secinfo) 1106 { 1107 DECODE_HEAD; 1108 1109 READ_BUF(4); 1110 secinfo->si_namelen = be32_to_cpup(p++); 1111 READ_BUF(secinfo->si_namelen); 1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1113 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1114 if (status) 1115 return status; 1116 DECODE_TAIL; 1117 } 1118 1119 static __be32 1120 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1121 struct nfsd4_secinfo_no_name *sin) 1122 { 1123 DECODE_HEAD; 1124 1125 READ_BUF(4); 1126 sin->sin_style = be32_to_cpup(p++); 1127 DECODE_TAIL; 1128 } 1129 1130 static __be32 1131 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1132 { 1133 __be32 status; 1134 1135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1136 if (status) 1137 return status; 1138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1139 &setattr->sa_acl, &setattr->sa_label); 1140 } 1141 1142 static __be32 1143 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1144 { 1145 DECODE_HEAD; 1146 1147 if (argp->minorversion >= 1) 1148 return nfserr_notsupp; 1149 1150 READ_BUF(NFS4_VERIFIER_SIZE); 1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1152 1153 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1154 if (status) 1155 return nfserr_bad_xdr; 1156 READ_BUF(8); 1157 setclientid->se_callback_prog = be32_to_cpup(p++); 1158 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1159 READ_BUF(setclientid->se_callback_netid_len); 1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1161 READ_BUF(4); 1162 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1163 1164 READ_BUF(setclientid->se_callback_addr_len); 1165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1166 READ_BUF(4); 1167 setclientid->se_callback_ident = be32_to_cpup(p++); 1168 1169 DECODE_TAIL; 1170 } 1171 1172 static __be32 1173 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1174 { 1175 DECODE_HEAD; 1176 1177 if (argp->minorversion >= 1) 1178 return nfserr_notsupp; 1179 1180 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1181 COPYMEM(&scd_c->sc_clientid, 8); 1182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1183 1184 DECODE_TAIL; 1185 } 1186 1187 /* Also used for NVERIFY */ 1188 static __be32 1189 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1190 { 1191 DECODE_HEAD; 1192 1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1194 goto out; 1195 1196 /* For convenience's sake, we compare raw xdr'd attributes in 1197 * nfsd4_proc_verify */ 1198 1199 READ_BUF(4); 1200 verify->ve_attrlen = be32_to_cpup(p++); 1201 READ_BUF(verify->ve_attrlen); 1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1203 1204 DECODE_TAIL; 1205 } 1206 1207 static __be32 1208 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1209 { 1210 int avail; 1211 int len; 1212 DECODE_HEAD; 1213 1214 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1215 if (status) 1216 return status; 1217 READ_BUF(16); 1218 p = xdr_decode_hyper(p, &write->wr_offset); 1219 write->wr_stable_how = be32_to_cpup(p++); 1220 if (write->wr_stable_how > 2) 1221 goto xdr_error; 1222 write->wr_buflen = be32_to_cpup(p++); 1223 1224 /* Sorry .. no magic macros for this.. * 1225 * READ_BUF(write->wr_buflen); 1226 * SAVEMEM(write->wr_buf, write->wr_buflen); 1227 */ 1228 avail = (char*)argp->end - (char*)argp->p; 1229 if (avail + argp->pagelen < write->wr_buflen) { 1230 dprintk("NFSD: xdr error (%s:%d)\n", 1231 __FILE__, __LINE__); 1232 goto xdr_error; 1233 } 1234 write->wr_head.iov_base = p; 1235 write->wr_head.iov_len = avail; 1236 write->wr_pagelist = argp->pagelist; 1237 1238 len = XDR_QUADLEN(write->wr_buflen) << 2; 1239 if (len >= avail) { 1240 int pages; 1241 1242 len -= avail; 1243 1244 pages = len >> PAGE_SHIFT; 1245 argp->pagelist += pages; 1246 argp->pagelen -= pages * PAGE_SIZE; 1247 len -= pages * PAGE_SIZE; 1248 1249 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1250 argp->pagelist++; 1251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1252 } 1253 argp->p += XDR_QUADLEN(len); 1254 1255 DECODE_TAIL; 1256 } 1257 1258 static __be32 1259 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1260 { 1261 DECODE_HEAD; 1262 1263 if (argp->minorversion >= 1) 1264 return nfserr_notsupp; 1265 1266 READ_BUF(12); 1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1268 rlockowner->rl_owner.len = be32_to_cpup(p++); 1269 READ_BUF(rlockowner->rl_owner.len); 1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1271 1272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1273 return nfserr_inval; 1274 DECODE_TAIL; 1275 } 1276 1277 static __be32 1278 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1279 struct nfsd4_exchange_id *exid) 1280 { 1281 int dummy, tmp; 1282 DECODE_HEAD; 1283 1284 READ_BUF(NFS4_VERIFIER_SIZE); 1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1286 1287 status = nfsd4_decode_opaque(argp, &exid->clname); 1288 if (status) 1289 return nfserr_bad_xdr; 1290 1291 READ_BUF(4); 1292 exid->flags = be32_to_cpup(p++); 1293 1294 /* Ignore state_protect4_a */ 1295 READ_BUF(4); 1296 exid->spa_how = be32_to_cpup(p++); 1297 switch (exid->spa_how) { 1298 case SP4_NONE: 1299 break; 1300 case SP4_MACH_CRED: 1301 /* spo_must_enforce */ 1302 status = nfsd4_decode_bitmap(argp, 1303 exid->spo_must_enforce); 1304 if (status) 1305 goto out; 1306 /* spo_must_allow */ 1307 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); 1308 if (status) 1309 goto out; 1310 break; 1311 case SP4_SSV: 1312 /* ssp_ops */ 1313 READ_BUF(4); 1314 dummy = be32_to_cpup(p++); 1315 READ_BUF(dummy * 4); 1316 p += dummy; 1317 1318 READ_BUF(4); 1319 dummy = be32_to_cpup(p++); 1320 READ_BUF(dummy * 4); 1321 p += dummy; 1322 1323 /* ssp_hash_algs<> */ 1324 READ_BUF(4); 1325 tmp = be32_to_cpup(p++); 1326 while (tmp--) { 1327 READ_BUF(4); 1328 dummy = be32_to_cpup(p++); 1329 READ_BUF(dummy); 1330 p += XDR_QUADLEN(dummy); 1331 } 1332 1333 /* ssp_encr_algs<> */ 1334 READ_BUF(4); 1335 tmp = be32_to_cpup(p++); 1336 while (tmp--) { 1337 READ_BUF(4); 1338 dummy = be32_to_cpup(p++); 1339 READ_BUF(dummy); 1340 p += XDR_QUADLEN(dummy); 1341 } 1342 1343 /* ssp_window and ssp_num_gss_handles */ 1344 READ_BUF(8); 1345 dummy = be32_to_cpup(p++); 1346 dummy = be32_to_cpup(p++); 1347 break; 1348 default: 1349 goto xdr_error; 1350 } 1351 1352 /* Ignore Implementation ID */ 1353 READ_BUF(4); /* nfs_impl_id4 array length */ 1354 dummy = be32_to_cpup(p++); 1355 1356 if (dummy > 1) 1357 goto xdr_error; 1358 1359 if (dummy == 1) { 1360 /* nii_domain */ 1361 READ_BUF(4); 1362 dummy = be32_to_cpup(p++); 1363 READ_BUF(dummy); 1364 p += XDR_QUADLEN(dummy); 1365 1366 /* nii_name */ 1367 READ_BUF(4); 1368 dummy = be32_to_cpup(p++); 1369 READ_BUF(dummy); 1370 p += XDR_QUADLEN(dummy); 1371 1372 /* nii_date */ 1373 READ_BUF(12); 1374 p += 3; 1375 } 1376 DECODE_TAIL; 1377 } 1378 1379 static __be32 1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1381 struct nfsd4_create_session *sess) 1382 { 1383 DECODE_HEAD; 1384 u32 dummy; 1385 1386 READ_BUF(16); 1387 COPYMEM(&sess->clientid, 8); 1388 sess->seqid = be32_to_cpup(p++); 1389 sess->flags = be32_to_cpup(p++); 1390 1391 /* Fore channel attrs */ 1392 READ_BUF(28); 1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1397 sess->fore_channel.maxops = be32_to_cpup(p++); 1398 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1400 if (sess->fore_channel.nr_rdma_attrs == 1) { 1401 READ_BUF(4); 1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1404 dprintk("Too many fore channel attr bitmaps!\n"); 1405 goto xdr_error; 1406 } 1407 1408 /* Back channel attrs */ 1409 READ_BUF(28); 1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1414 sess->back_channel.maxops = be32_to_cpup(p++); 1415 sess->back_channel.maxreqs = be32_to_cpup(p++); 1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1417 if (sess->back_channel.nr_rdma_attrs == 1) { 1418 READ_BUF(4); 1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1420 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1421 dprintk("Too many back channel attr bitmaps!\n"); 1422 goto xdr_error; 1423 } 1424 1425 READ_BUF(4); 1426 sess->callback_prog = be32_to_cpup(p++); 1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1428 DECODE_TAIL; 1429 } 1430 1431 static __be32 1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1433 struct nfsd4_destroy_session *destroy_session) 1434 { 1435 DECODE_HEAD; 1436 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1438 1439 DECODE_TAIL; 1440 } 1441 1442 static __be32 1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1444 struct nfsd4_free_stateid *free_stateid) 1445 { 1446 DECODE_HEAD; 1447 1448 READ_BUF(sizeof(stateid_t)); 1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1451 1452 DECODE_TAIL; 1453 } 1454 1455 static __be32 1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1457 struct nfsd4_sequence *seq) 1458 { 1459 DECODE_HEAD; 1460 1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1463 seq->seqid = be32_to_cpup(p++); 1464 seq->slotid = be32_to_cpup(p++); 1465 seq->maxslots = be32_to_cpup(p++); 1466 seq->cachethis = be32_to_cpup(p++); 1467 1468 DECODE_TAIL; 1469 } 1470 1471 static __be32 1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1473 { 1474 int i; 1475 __be32 *p, status; 1476 struct nfsd4_test_stateid_id *stateid; 1477 1478 READ_BUF(4); 1479 test_stateid->ts_num_ids = ntohl(*p++); 1480 1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1482 1483 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1484 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1485 if (!stateid) { 1486 status = nfserrno(-ENOMEM); 1487 goto out; 1488 } 1489 1490 INIT_LIST_HEAD(&stateid->ts_id_list); 1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1492 1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1494 if (status) 1495 goto out; 1496 } 1497 1498 status = 0; 1499 out: 1500 return status; 1501 xdr_error: 1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1503 status = nfserr_bad_xdr; 1504 goto out; 1505 } 1506 1507 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1508 { 1509 DECODE_HEAD; 1510 1511 READ_BUF(8); 1512 COPYMEM(&dc->clientid, 8); 1513 1514 DECODE_TAIL; 1515 } 1516 1517 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1518 { 1519 DECODE_HEAD; 1520 1521 READ_BUF(4); 1522 rc->rca_one_fs = be32_to_cpup(p++); 1523 1524 DECODE_TAIL; 1525 } 1526 1527 #ifdef CONFIG_NFSD_PNFS 1528 static __be32 1529 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1530 struct nfsd4_getdeviceinfo *gdev) 1531 { 1532 DECODE_HEAD; 1533 u32 num, i; 1534 1535 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1536 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1537 gdev->gd_layout_type = be32_to_cpup(p++); 1538 gdev->gd_maxcount = be32_to_cpup(p++); 1539 num = be32_to_cpup(p++); 1540 if (num) { 1541 READ_BUF(4 * num); 1542 gdev->gd_notify_types = be32_to_cpup(p++); 1543 for (i = 1; i < num; i++) { 1544 if (be32_to_cpup(p++)) { 1545 status = nfserr_inval; 1546 goto out; 1547 } 1548 } 1549 } 1550 DECODE_TAIL; 1551 } 1552 1553 static __be32 1554 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1555 struct nfsd4_layoutget *lgp) 1556 { 1557 DECODE_HEAD; 1558 1559 READ_BUF(36); 1560 lgp->lg_signal = be32_to_cpup(p++); 1561 lgp->lg_layout_type = be32_to_cpup(p++); 1562 lgp->lg_seg.iomode = be32_to_cpup(p++); 1563 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1564 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1565 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1566 1567 status = nfsd4_decode_stateid(argp, &lgp->lg_sid); 1568 if (status) 1569 return status; 1570 1571 READ_BUF(4); 1572 lgp->lg_maxcount = be32_to_cpup(p++); 1573 1574 DECODE_TAIL; 1575 } 1576 1577 static __be32 1578 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1579 struct nfsd4_layoutcommit *lcp) 1580 { 1581 DECODE_HEAD; 1582 u32 timechange; 1583 1584 READ_BUF(20); 1585 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1586 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1587 lcp->lc_reclaim = be32_to_cpup(p++); 1588 1589 status = nfsd4_decode_stateid(argp, &lcp->lc_sid); 1590 if (status) 1591 return status; 1592 1593 READ_BUF(4); 1594 lcp->lc_newoffset = be32_to_cpup(p++); 1595 if (lcp->lc_newoffset) { 1596 READ_BUF(8); 1597 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1598 } else 1599 lcp->lc_last_wr = 0; 1600 READ_BUF(4); 1601 timechange = be32_to_cpup(p++); 1602 if (timechange) { 1603 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1604 if (status) 1605 return status; 1606 } else { 1607 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1608 } 1609 READ_BUF(8); 1610 lcp->lc_layout_type = be32_to_cpup(p++); 1611 1612 /* 1613 * Save the layout update in XDR format and let the layout driver deal 1614 * with it later. 1615 */ 1616 lcp->lc_up_len = be32_to_cpup(p++); 1617 if (lcp->lc_up_len > 0) { 1618 READ_BUF(lcp->lc_up_len); 1619 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1620 } 1621 1622 DECODE_TAIL; 1623 } 1624 1625 static __be32 1626 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1627 struct nfsd4_layoutreturn *lrp) 1628 { 1629 DECODE_HEAD; 1630 1631 READ_BUF(16); 1632 lrp->lr_reclaim = be32_to_cpup(p++); 1633 lrp->lr_layout_type = be32_to_cpup(p++); 1634 lrp->lr_seg.iomode = be32_to_cpup(p++); 1635 lrp->lr_return_type = be32_to_cpup(p++); 1636 if (lrp->lr_return_type == RETURN_FILE) { 1637 READ_BUF(16); 1638 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1639 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1640 1641 status = nfsd4_decode_stateid(argp, &lrp->lr_sid); 1642 if (status) 1643 return status; 1644 1645 READ_BUF(4); 1646 lrp->lrf_body_len = be32_to_cpup(p++); 1647 if (lrp->lrf_body_len > 0) { 1648 READ_BUF(lrp->lrf_body_len); 1649 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1650 } 1651 } else { 1652 lrp->lr_seg.offset = 0; 1653 lrp->lr_seg.length = NFS4_MAX_UINT64; 1654 } 1655 1656 DECODE_TAIL; 1657 } 1658 #endif /* CONFIG_NFSD_PNFS */ 1659 1660 static __be32 1661 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1662 struct nfsd4_fallocate *fallocate) 1663 { 1664 DECODE_HEAD; 1665 1666 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1667 if (status) 1668 return status; 1669 1670 READ_BUF(16); 1671 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1672 xdr_decode_hyper(p, &fallocate->falloc_length); 1673 1674 DECODE_TAIL; 1675 } 1676 1677 static __be32 1678 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) 1679 { 1680 DECODE_HEAD; 1681 1682 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); 1683 if (status) 1684 return status; 1685 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); 1686 if (status) 1687 return status; 1688 1689 READ_BUF(8 + 8 + 8); 1690 p = xdr_decode_hyper(p, &clone->cl_src_pos); 1691 p = xdr_decode_hyper(p, &clone->cl_dst_pos); 1692 p = xdr_decode_hyper(p, &clone->cl_count); 1693 DECODE_TAIL; 1694 } 1695 1696 static __be32 1697 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1698 { 1699 DECODE_HEAD; 1700 1701 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1702 if (status) 1703 return status; 1704 1705 READ_BUF(8 + 4); 1706 p = xdr_decode_hyper(p, &seek->seek_offset); 1707 seek->seek_whence = be32_to_cpup(p); 1708 1709 DECODE_TAIL; 1710 } 1711 1712 static __be32 1713 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1714 { 1715 return nfs_ok; 1716 } 1717 1718 static __be32 1719 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1720 { 1721 return nfserr_notsupp; 1722 } 1723 1724 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1725 1726 static nfsd4_dec nfsd4_dec_ops[] = { 1727 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1728 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1729 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1730 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1731 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1732 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1733 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1734 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1735 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1736 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1737 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1738 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1739 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1740 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1741 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1742 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1743 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1744 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1745 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1746 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1747 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1748 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1749 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1750 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1751 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1752 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1753 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1754 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1755 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1756 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1757 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1758 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1759 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1760 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1761 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1762 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1763 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1764 1765 /* new operations for NFSv4.1 */ 1766 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1767 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1768 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1769 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1770 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1771 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1772 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1773 #ifdef CONFIG_NFSD_PNFS 1774 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1775 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1776 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1777 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1778 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1779 #else 1780 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1781 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1782 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1783 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1784 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1785 #endif 1786 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1787 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1788 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1789 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1790 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1791 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1792 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1793 1794 /* new operations for NFSv4.2 */ 1795 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1796 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp, 1797 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1798 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1799 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1800 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1801 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1802 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1803 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1804 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1805 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1806 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1807 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, 1808 }; 1809 1810 static inline bool 1811 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1812 { 1813 if (op->opnum < FIRST_NFS4_OP) 1814 return false; 1815 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1816 return false; 1817 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1818 return false; 1819 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1820 return false; 1821 return true; 1822 } 1823 1824 static __be32 1825 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1826 { 1827 DECODE_HEAD; 1828 struct nfsd4_op *op; 1829 bool cachethis = false; 1830 int auth_slack= argp->rqstp->rq_auth_slack; 1831 int max_reply = auth_slack + 8; /* opcnt, status */ 1832 int readcount = 0; 1833 int readbytes = 0; 1834 int i; 1835 1836 READ_BUF(4); 1837 argp->taglen = be32_to_cpup(p++); 1838 READ_BUF(argp->taglen); 1839 SAVEMEM(argp->tag, argp->taglen); 1840 READ_BUF(8); 1841 argp->minorversion = be32_to_cpup(p++); 1842 argp->opcnt = be32_to_cpup(p++); 1843 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1844 1845 if (argp->taglen > NFSD4_MAX_TAGLEN) 1846 goto xdr_error; 1847 if (argp->opcnt > 100) 1848 goto xdr_error; 1849 1850 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1851 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1852 if (!argp->ops) { 1853 argp->ops = argp->iops; 1854 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1855 goto xdr_error; 1856 } 1857 } 1858 1859 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1860 argp->opcnt = 0; 1861 1862 for (i = 0; i < argp->opcnt; i++) { 1863 op = &argp->ops[i]; 1864 op->replay = NULL; 1865 1866 READ_BUF(4); 1867 op->opnum = be32_to_cpup(p++); 1868 1869 if (nfsd4_opnum_in_range(argp, op)) 1870 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1871 else { 1872 op->opnum = OP_ILLEGAL; 1873 op->status = nfserr_op_illegal; 1874 } 1875 /* 1876 * We'll try to cache the result in the DRC if any one 1877 * op in the compound wants to be cached: 1878 */ 1879 cachethis |= nfsd4_cache_this_op(op); 1880 1881 if (op->opnum == OP_READ) { 1882 readcount++; 1883 readbytes += nfsd4_max_reply(argp->rqstp, op); 1884 } else 1885 max_reply += nfsd4_max_reply(argp->rqstp, op); 1886 /* 1887 * OP_LOCK may return a conflicting lock. (Special case 1888 * because it will just skip encoding this if it runs 1889 * out of xdr buffer space, and it is the only operation 1890 * that behaves this way.) 1891 */ 1892 if (op->opnum == OP_LOCK) 1893 max_reply += NFS4_OPAQUE_LIMIT; 1894 1895 if (op->status) { 1896 argp->opcnt = i+1; 1897 break; 1898 } 1899 } 1900 /* Sessions make the DRC unnecessary: */ 1901 if (argp->minorversion) 1902 cachethis = false; 1903 svc_reserve(argp->rqstp, max_reply + readbytes); 1904 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1905 1906 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1907 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1908 1909 DECODE_TAIL; 1910 } 1911 1912 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1913 { 1914 if (IS_I_VERSION(inode)) { 1915 p = xdr_encode_hyper(p, inode->i_version); 1916 } else { 1917 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1918 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1919 } 1920 return p; 1921 } 1922 1923 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1924 { 1925 *p++ = cpu_to_be32(c->atomic); 1926 if (c->change_supported) { 1927 p = xdr_encode_hyper(p, c->before_change); 1928 p = xdr_encode_hyper(p, c->after_change); 1929 } else { 1930 *p++ = cpu_to_be32(c->before_ctime_sec); 1931 *p++ = cpu_to_be32(c->before_ctime_nsec); 1932 *p++ = cpu_to_be32(c->after_ctime_sec); 1933 *p++ = cpu_to_be32(c->after_ctime_nsec); 1934 } 1935 return p; 1936 } 1937 1938 /* Encode as an array of strings the string given with components 1939 * separated @sep, escaped with esc_enter and esc_exit. 1940 */ 1941 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1942 char *components, char esc_enter, 1943 char esc_exit) 1944 { 1945 __be32 *p; 1946 __be32 pathlen; 1947 int pathlen_offset; 1948 int strlen, count=0; 1949 char *str, *end, *next; 1950 1951 dprintk("nfsd4_encode_components(%s)\n", components); 1952 1953 pathlen_offset = xdr->buf->len; 1954 p = xdr_reserve_space(xdr, 4); 1955 if (!p) 1956 return nfserr_resource; 1957 p++; /* We will fill this in with @count later */ 1958 1959 end = str = components; 1960 while (*end) { 1961 bool found_esc = false; 1962 1963 /* try to parse as esc_start, ..., esc_end, sep */ 1964 if (*str == esc_enter) { 1965 for (; *end && (*end != esc_exit); end++) 1966 /* find esc_exit or end of string */; 1967 next = end + 1; 1968 if (*end && (!*next || *next == sep)) { 1969 str++; 1970 found_esc = true; 1971 } 1972 } 1973 1974 if (!found_esc) 1975 for (; *end && (*end != sep); end++) 1976 /* find sep or end of string */; 1977 1978 strlen = end - str; 1979 if (strlen) { 1980 p = xdr_reserve_space(xdr, strlen + 4); 1981 if (!p) 1982 return nfserr_resource; 1983 p = xdr_encode_opaque(p, str, strlen); 1984 count++; 1985 } 1986 else 1987 end++; 1988 if (found_esc) 1989 end = next; 1990 1991 str = end; 1992 } 1993 pathlen = htonl(count); 1994 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 1995 return 0; 1996 } 1997 1998 /* Encode as an array of strings the string given with components 1999 * separated @sep. 2000 */ 2001 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2002 char *components) 2003 { 2004 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2005 } 2006 2007 /* 2008 * encode a location element of a fs_locations structure 2009 */ 2010 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2011 struct nfsd4_fs_location *location) 2012 { 2013 __be32 status; 2014 2015 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2016 '[', ']'); 2017 if (status) 2018 return status; 2019 status = nfsd4_encode_components(xdr, '/', location->path); 2020 if (status) 2021 return status; 2022 return 0; 2023 } 2024 2025 /* 2026 * Encode a path in RFC3530 'pathname4' format 2027 */ 2028 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2029 const struct path *root, 2030 const struct path *path) 2031 { 2032 struct path cur = *path; 2033 __be32 *p; 2034 struct dentry **components = NULL; 2035 unsigned int ncomponents = 0; 2036 __be32 err = nfserr_jukebox; 2037 2038 dprintk("nfsd4_encode_components("); 2039 2040 path_get(&cur); 2041 /* First walk the path up to the nfsd root, and store the 2042 * dentries/path components in an array. 2043 */ 2044 for (;;) { 2045 if (path_equal(&cur, root)) 2046 break; 2047 if (cur.dentry == cur.mnt->mnt_root) { 2048 if (follow_up(&cur)) 2049 continue; 2050 goto out_free; 2051 } 2052 if ((ncomponents & 15) == 0) { 2053 struct dentry **new; 2054 new = krealloc(components, 2055 sizeof(*new) * (ncomponents + 16), 2056 GFP_KERNEL); 2057 if (!new) 2058 goto out_free; 2059 components = new; 2060 } 2061 components[ncomponents++] = cur.dentry; 2062 cur.dentry = dget_parent(cur.dentry); 2063 } 2064 err = nfserr_resource; 2065 p = xdr_reserve_space(xdr, 4); 2066 if (!p) 2067 goto out_free; 2068 *p++ = cpu_to_be32(ncomponents); 2069 2070 while (ncomponents) { 2071 struct dentry *dentry = components[ncomponents - 1]; 2072 unsigned int len; 2073 2074 spin_lock(&dentry->d_lock); 2075 len = dentry->d_name.len; 2076 p = xdr_reserve_space(xdr, len + 4); 2077 if (!p) { 2078 spin_unlock(&dentry->d_lock); 2079 goto out_free; 2080 } 2081 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2082 dprintk("/%pd", dentry); 2083 spin_unlock(&dentry->d_lock); 2084 dput(dentry); 2085 ncomponents--; 2086 } 2087 2088 err = 0; 2089 out_free: 2090 dprintk(")\n"); 2091 while (ncomponents) 2092 dput(components[--ncomponents]); 2093 kfree(components); 2094 path_put(&cur); 2095 return err; 2096 } 2097 2098 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2099 struct svc_rqst *rqstp, const struct path *path) 2100 { 2101 struct svc_export *exp_ps; 2102 __be32 res; 2103 2104 exp_ps = rqst_find_fsidzero_export(rqstp); 2105 if (IS_ERR(exp_ps)) 2106 return nfserrno(PTR_ERR(exp_ps)); 2107 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2108 exp_put(exp_ps); 2109 return res; 2110 } 2111 2112 /* 2113 * encode a fs_locations structure 2114 */ 2115 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2116 struct svc_rqst *rqstp, struct svc_export *exp) 2117 { 2118 __be32 status; 2119 int i; 2120 __be32 *p; 2121 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2122 2123 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2124 if (status) 2125 return status; 2126 p = xdr_reserve_space(xdr, 4); 2127 if (!p) 2128 return nfserr_resource; 2129 *p++ = cpu_to_be32(fslocs->locations_count); 2130 for (i=0; i<fslocs->locations_count; i++) { 2131 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2132 if (status) 2133 return status; 2134 } 2135 return 0; 2136 } 2137 2138 static u32 nfs4_file_type(umode_t mode) 2139 { 2140 switch (mode & S_IFMT) { 2141 case S_IFIFO: return NF4FIFO; 2142 case S_IFCHR: return NF4CHR; 2143 case S_IFDIR: return NF4DIR; 2144 case S_IFBLK: return NF4BLK; 2145 case S_IFLNK: return NF4LNK; 2146 case S_IFREG: return NF4REG; 2147 case S_IFSOCK: return NF4SOCK; 2148 default: return NF4BAD; 2149 }; 2150 } 2151 2152 static inline __be32 2153 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2154 struct nfs4_ace *ace) 2155 { 2156 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2157 return nfs4_acl_write_who(xdr, ace->whotype); 2158 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2159 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2160 else 2161 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2162 } 2163 2164 static inline __be32 2165 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) 2166 { 2167 __be32 *p; 2168 unsigned long i = hweight_long(layout_types); 2169 2170 p = xdr_reserve_space(xdr, 4 + 4 * i); 2171 if (!p) 2172 return nfserr_resource; 2173 2174 *p++ = cpu_to_be32(i); 2175 2176 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) 2177 if (layout_types & (1 << i)) 2178 *p++ = cpu_to_be32(i); 2179 2180 return 0; 2181 } 2182 2183 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2184 FATTR4_WORD0_RDATTR_ERROR) 2185 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2186 #define WORD2_ABSENT_FS_ATTRS 0 2187 2188 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2189 static inline __be32 2190 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2191 void *context, int len) 2192 { 2193 __be32 *p; 2194 2195 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2196 if (!p) 2197 return nfserr_resource; 2198 2199 /* 2200 * For now we use a 0 here to indicate the null translation; in 2201 * the future we may place a call to translation code here. 2202 */ 2203 *p++ = cpu_to_be32(0); /* lfs */ 2204 *p++ = cpu_to_be32(0); /* pi */ 2205 p = xdr_encode_opaque(p, context, len); 2206 return 0; 2207 } 2208 #else 2209 static inline __be32 2210 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2211 void *context, int len) 2212 { return 0; } 2213 #endif 2214 2215 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2216 { 2217 /* As per referral draft: */ 2218 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2219 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2220 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2221 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2222 *rdattr_err = NFSERR_MOVED; 2223 else 2224 return nfserr_moved; 2225 } 2226 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2227 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2228 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2229 return 0; 2230 } 2231 2232 2233 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2234 { 2235 struct path path = exp->ex_path; 2236 int err; 2237 2238 path_get(&path); 2239 while (follow_up(&path)) { 2240 if (path.dentry != path.mnt->mnt_root) 2241 break; 2242 } 2243 err = vfs_getattr(&path, stat); 2244 path_put(&path); 2245 return err; 2246 } 2247 2248 static __be32 2249 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2250 { 2251 __be32 *p; 2252 2253 if (bmval2) { 2254 p = xdr_reserve_space(xdr, 16); 2255 if (!p) 2256 goto out_resource; 2257 *p++ = cpu_to_be32(3); 2258 *p++ = cpu_to_be32(bmval0); 2259 *p++ = cpu_to_be32(bmval1); 2260 *p++ = cpu_to_be32(bmval2); 2261 } else if (bmval1) { 2262 p = xdr_reserve_space(xdr, 12); 2263 if (!p) 2264 goto out_resource; 2265 *p++ = cpu_to_be32(2); 2266 *p++ = cpu_to_be32(bmval0); 2267 *p++ = cpu_to_be32(bmval1); 2268 } else { 2269 p = xdr_reserve_space(xdr, 8); 2270 if (!p) 2271 goto out_resource; 2272 *p++ = cpu_to_be32(1); 2273 *p++ = cpu_to_be32(bmval0); 2274 } 2275 2276 return 0; 2277 out_resource: 2278 return nfserr_resource; 2279 } 2280 2281 /* 2282 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2283 * ourselves. 2284 */ 2285 static __be32 2286 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2287 struct svc_export *exp, 2288 struct dentry *dentry, u32 *bmval, 2289 struct svc_rqst *rqstp, int ignore_crossmnt) 2290 { 2291 u32 bmval0 = bmval[0]; 2292 u32 bmval1 = bmval[1]; 2293 u32 bmval2 = bmval[2]; 2294 struct kstat stat; 2295 struct svc_fh *tempfh = NULL; 2296 struct kstatfs statfs; 2297 __be32 *p; 2298 int starting_len = xdr->buf->len; 2299 int attrlen_offset; 2300 __be32 attrlen; 2301 u32 dummy; 2302 u64 dummy64; 2303 u32 rdattr_err = 0; 2304 __be32 status; 2305 int err; 2306 struct nfs4_acl *acl = NULL; 2307 void *context = NULL; 2308 int contextlen; 2309 bool contextsupport = false; 2310 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2311 u32 minorversion = resp->cstate.minorversion; 2312 struct path path = { 2313 .mnt = exp->ex_path.mnt, 2314 .dentry = dentry, 2315 }; 2316 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2317 2318 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2319 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2320 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2321 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2322 2323 if (exp->ex_fslocs.migrated) { 2324 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2325 if (status) 2326 goto out; 2327 } 2328 2329 err = vfs_getattr(&path, &stat); 2330 if (err) 2331 goto out_nfserr; 2332 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2333 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2334 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2335 FATTR4_WORD1_SPACE_TOTAL))) { 2336 err = vfs_statfs(&path, &statfs); 2337 if (err) 2338 goto out_nfserr; 2339 } 2340 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2341 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2342 status = nfserr_jukebox; 2343 if (!tempfh) 2344 goto out; 2345 fh_init(tempfh, NFS4_FHSIZE); 2346 status = fh_compose(tempfh, exp, dentry, NULL); 2347 if (status) 2348 goto out; 2349 fhp = tempfh; 2350 } 2351 if (bmval0 & FATTR4_WORD0_ACL) { 2352 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2353 if (err == -EOPNOTSUPP) 2354 bmval0 &= ~FATTR4_WORD0_ACL; 2355 else if (err == -EINVAL) { 2356 status = nfserr_attrnotsupp; 2357 goto out; 2358 } else if (err != 0) 2359 goto out_nfserr; 2360 } 2361 2362 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2363 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2364 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2365 err = security_inode_getsecctx(d_inode(dentry), 2366 &context, &contextlen); 2367 contextsupport = (err == 0); 2368 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2369 if (err == -EOPNOTSUPP) 2370 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2371 else if (err) 2372 goto out_nfserr; 2373 } 2374 } 2375 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2376 2377 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2378 if (status) 2379 goto out; 2380 2381 attrlen_offset = xdr->buf->len; 2382 p = xdr_reserve_space(xdr, 4); 2383 if (!p) 2384 goto out_resource; 2385 p++; /* to be backfilled later */ 2386 2387 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2388 u32 word0 = nfsd_suppattrs0(minorversion); 2389 u32 word1 = nfsd_suppattrs1(minorversion); 2390 u32 word2 = nfsd_suppattrs2(minorversion); 2391 2392 if (!IS_POSIXACL(dentry->d_inode)) 2393 word0 &= ~FATTR4_WORD0_ACL; 2394 if (!contextsupport) 2395 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2396 if (!word2) { 2397 p = xdr_reserve_space(xdr, 12); 2398 if (!p) 2399 goto out_resource; 2400 *p++ = cpu_to_be32(2); 2401 *p++ = cpu_to_be32(word0); 2402 *p++ = cpu_to_be32(word1); 2403 } else { 2404 p = xdr_reserve_space(xdr, 16); 2405 if (!p) 2406 goto out_resource; 2407 *p++ = cpu_to_be32(3); 2408 *p++ = cpu_to_be32(word0); 2409 *p++ = cpu_to_be32(word1); 2410 *p++ = cpu_to_be32(word2); 2411 } 2412 } 2413 if (bmval0 & FATTR4_WORD0_TYPE) { 2414 p = xdr_reserve_space(xdr, 4); 2415 if (!p) 2416 goto out_resource; 2417 dummy = nfs4_file_type(stat.mode); 2418 if (dummy == NF4BAD) { 2419 status = nfserr_serverfault; 2420 goto out; 2421 } 2422 *p++ = cpu_to_be32(dummy); 2423 } 2424 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2425 p = xdr_reserve_space(xdr, 4); 2426 if (!p) 2427 goto out_resource; 2428 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2429 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2430 else 2431 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2432 NFS4_FH_VOL_RENAME); 2433 } 2434 if (bmval0 & FATTR4_WORD0_CHANGE) { 2435 p = xdr_reserve_space(xdr, 8); 2436 if (!p) 2437 goto out_resource; 2438 p = encode_change(p, &stat, d_inode(dentry)); 2439 } 2440 if (bmval0 & FATTR4_WORD0_SIZE) { 2441 p = xdr_reserve_space(xdr, 8); 2442 if (!p) 2443 goto out_resource; 2444 p = xdr_encode_hyper(p, stat.size); 2445 } 2446 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2447 p = xdr_reserve_space(xdr, 4); 2448 if (!p) 2449 goto out_resource; 2450 *p++ = cpu_to_be32(1); 2451 } 2452 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2453 p = xdr_reserve_space(xdr, 4); 2454 if (!p) 2455 goto out_resource; 2456 *p++ = cpu_to_be32(1); 2457 } 2458 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2459 p = xdr_reserve_space(xdr, 4); 2460 if (!p) 2461 goto out_resource; 2462 *p++ = cpu_to_be32(0); 2463 } 2464 if (bmval0 & FATTR4_WORD0_FSID) { 2465 p = xdr_reserve_space(xdr, 16); 2466 if (!p) 2467 goto out_resource; 2468 if (exp->ex_fslocs.migrated) { 2469 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2470 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2471 } else switch(fsid_source(fhp)) { 2472 case FSIDSOURCE_FSID: 2473 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2474 p = xdr_encode_hyper(p, (u64)0); 2475 break; 2476 case FSIDSOURCE_DEV: 2477 *p++ = cpu_to_be32(0); 2478 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2479 *p++ = cpu_to_be32(0); 2480 *p++ = cpu_to_be32(MINOR(stat.dev)); 2481 break; 2482 case FSIDSOURCE_UUID: 2483 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2484 EX_UUID_LEN); 2485 break; 2486 } 2487 } 2488 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2489 p = xdr_reserve_space(xdr, 4); 2490 if (!p) 2491 goto out_resource; 2492 *p++ = cpu_to_be32(0); 2493 } 2494 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2495 p = xdr_reserve_space(xdr, 4); 2496 if (!p) 2497 goto out_resource; 2498 *p++ = cpu_to_be32(nn->nfsd4_lease); 2499 } 2500 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2501 p = xdr_reserve_space(xdr, 4); 2502 if (!p) 2503 goto out_resource; 2504 *p++ = cpu_to_be32(rdattr_err); 2505 } 2506 if (bmval0 & FATTR4_WORD0_ACL) { 2507 struct nfs4_ace *ace; 2508 2509 if (acl == NULL) { 2510 p = xdr_reserve_space(xdr, 4); 2511 if (!p) 2512 goto out_resource; 2513 2514 *p++ = cpu_to_be32(0); 2515 goto out_acl; 2516 } 2517 p = xdr_reserve_space(xdr, 4); 2518 if (!p) 2519 goto out_resource; 2520 *p++ = cpu_to_be32(acl->naces); 2521 2522 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2523 p = xdr_reserve_space(xdr, 4*3); 2524 if (!p) 2525 goto out_resource; 2526 *p++ = cpu_to_be32(ace->type); 2527 *p++ = cpu_to_be32(ace->flag); 2528 *p++ = cpu_to_be32(ace->access_mask & 2529 NFS4_ACE_MASK_ALL); 2530 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2531 if (status) 2532 goto out; 2533 } 2534 } 2535 out_acl: 2536 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2537 p = xdr_reserve_space(xdr, 4); 2538 if (!p) 2539 goto out_resource; 2540 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2541 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2542 } 2543 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2544 p = xdr_reserve_space(xdr, 4); 2545 if (!p) 2546 goto out_resource; 2547 *p++ = cpu_to_be32(1); 2548 } 2549 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2550 p = xdr_reserve_space(xdr, 4); 2551 if (!p) 2552 goto out_resource; 2553 *p++ = cpu_to_be32(0); 2554 } 2555 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2556 p = xdr_reserve_space(xdr, 4); 2557 if (!p) 2558 goto out_resource; 2559 *p++ = cpu_to_be32(1); 2560 } 2561 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2562 p = xdr_reserve_space(xdr, 4); 2563 if (!p) 2564 goto out_resource; 2565 *p++ = cpu_to_be32(1); 2566 } 2567 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2568 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2569 if (!p) 2570 goto out_resource; 2571 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2572 fhp->fh_handle.fh_size); 2573 } 2574 if (bmval0 & FATTR4_WORD0_FILEID) { 2575 p = xdr_reserve_space(xdr, 8); 2576 if (!p) 2577 goto out_resource; 2578 p = xdr_encode_hyper(p, stat.ino); 2579 } 2580 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2581 p = xdr_reserve_space(xdr, 8); 2582 if (!p) 2583 goto out_resource; 2584 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2585 } 2586 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2587 p = xdr_reserve_space(xdr, 8); 2588 if (!p) 2589 goto out_resource; 2590 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2591 } 2592 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2593 p = xdr_reserve_space(xdr, 8); 2594 if (!p) 2595 goto out_resource; 2596 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2597 } 2598 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2599 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2600 if (status) 2601 goto out; 2602 } 2603 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 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_MAXFILESIZE) { 2610 p = xdr_reserve_space(xdr, 8); 2611 if (!p) 2612 goto out_resource; 2613 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2614 } 2615 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2616 p = xdr_reserve_space(xdr, 4); 2617 if (!p) 2618 goto out_resource; 2619 *p++ = cpu_to_be32(255); 2620 } 2621 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2622 p = xdr_reserve_space(xdr, 4); 2623 if (!p) 2624 goto out_resource; 2625 *p++ = cpu_to_be32(statfs.f_namelen); 2626 } 2627 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2628 p = xdr_reserve_space(xdr, 8); 2629 if (!p) 2630 goto out_resource; 2631 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2632 } 2633 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2634 p = xdr_reserve_space(xdr, 8); 2635 if (!p) 2636 goto out_resource; 2637 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2638 } 2639 if (bmval1 & FATTR4_WORD1_MODE) { 2640 p = xdr_reserve_space(xdr, 4); 2641 if (!p) 2642 goto out_resource; 2643 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2644 } 2645 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2646 p = xdr_reserve_space(xdr, 4); 2647 if (!p) 2648 goto out_resource; 2649 *p++ = cpu_to_be32(1); 2650 } 2651 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2652 p = xdr_reserve_space(xdr, 4); 2653 if (!p) 2654 goto out_resource; 2655 *p++ = cpu_to_be32(stat.nlink); 2656 } 2657 if (bmval1 & FATTR4_WORD1_OWNER) { 2658 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2659 if (status) 2660 goto out; 2661 } 2662 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2663 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2664 if (status) 2665 goto out; 2666 } 2667 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2668 p = xdr_reserve_space(xdr, 8); 2669 if (!p) 2670 goto out_resource; 2671 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2672 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2673 } 2674 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2675 p = xdr_reserve_space(xdr, 8); 2676 if (!p) 2677 goto out_resource; 2678 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2679 p = xdr_encode_hyper(p, dummy64); 2680 } 2681 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2682 p = xdr_reserve_space(xdr, 8); 2683 if (!p) 2684 goto out_resource; 2685 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2686 p = xdr_encode_hyper(p, dummy64); 2687 } 2688 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2689 p = xdr_reserve_space(xdr, 8); 2690 if (!p) 2691 goto out_resource; 2692 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2693 p = xdr_encode_hyper(p, dummy64); 2694 } 2695 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2696 p = xdr_reserve_space(xdr, 8); 2697 if (!p) 2698 goto out_resource; 2699 dummy64 = (u64)stat.blocks << 9; 2700 p = xdr_encode_hyper(p, dummy64); 2701 } 2702 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2703 p = xdr_reserve_space(xdr, 12); 2704 if (!p) 2705 goto out_resource; 2706 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2707 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2708 } 2709 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2710 p = xdr_reserve_space(xdr, 12); 2711 if (!p) 2712 goto out_resource; 2713 *p++ = cpu_to_be32(0); 2714 *p++ = cpu_to_be32(1); 2715 *p++ = cpu_to_be32(0); 2716 } 2717 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2718 p = xdr_reserve_space(xdr, 12); 2719 if (!p) 2720 goto out_resource; 2721 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2722 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2723 } 2724 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2725 p = xdr_reserve_space(xdr, 12); 2726 if (!p) 2727 goto out_resource; 2728 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2729 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2730 } 2731 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2732 struct kstat parent_stat; 2733 u64 ino = stat.ino; 2734 2735 p = xdr_reserve_space(xdr, 8); 2736 if (!p) 2737 goto out_resource; 2738 /* 2739 * Get parent's attributes if not ignoring crossmount 2740 * and this is the root of a cross-mounted filesystem. 2741 */ 2742 if (ignore_crossmnt == 0 && 2743 dentry == exp->ex_path.mnt->mnt_root) { 2744 err = get_parent_attributes(exp, &parent_stat); 2745 if (err) 2746 goto out_nfserr; 2747 ino = parent_stat.ino; 2748 } 2749 p = xdr_encode_hyper(p, ino); 2750 } 2751 #ifdef CONFIG_NFSD_PNFS 2752 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2753 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2754 if (status) 2755 goto out; 2756 } 2757 2758 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2759 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2760 if (status) 2761 goto out; 2762 } 2763 2764 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2765 p = xdr_reserve_space(xdr, 4); 2766 if (!p) 2767 goto out_resource; 2768 *p++ = cpu_to_be32(stat.blksize); 2769 } 2770 #endif /* CONFIG_NFSD_PNFS */ 2771 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2772 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0, 2773 NFSD_SUPPATTR_EXCLCREAT_WORD1, 2774 NFSD_SUPPATTR_EXCLCREAT_WORD2); 2775 if (status) 2776 goto out; 2777 } 2778 2779 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2780 status = nfsd4_encode_security_label(xdr, rqstp, context, 2781 contextlen); 2782 if (status) 2783 goto out; 2784 } 2785 2786 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2787 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2788 status = nfs_ok; 2789 2790 out: 2791 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2792 if (context) 2793 security_release_secctx(context, contextlen); 2794 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2795 kfree(acl); 2796 if (tempfh) { 2797 fh_put(tempfh); 2798 kfree(tempfh); 2799 } 2800 if (status) 2801 xdr_truncate_encode(xdr, starting_len); 2802 return status; 2803 out_nfserr: 2804 status = nfserrno(err); 2805 goto out; 2806 out_resource: 2807 status = nfserr_resource; 2808 goto out; 2809 } 2810 2811 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2812 struct xdr_buf *buf, __be32 *p, int bytes) 2813 { 2814 xdr->scratch.iov_len = 0; 2815 memset(buf, 0, sizeof(struct xdr_buf)); 2816 buf->head[0].iov_base = p; 2817 buf->head[0].iov_len = 0; 2818 buf->len = 0; 2819 xdr->buf = buf; 2820 xdr->iov = buf->head; 2821 xdr->p = p; 2822 xdr->end = (void *)p + bytes; 2823 buf->buflen = bytes; 2824 } 2825 2826 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2827 struct svc_fh *fhp, struct svc_export *exp, 2828 struct dentry *dentry, u32 *bmval, 2829 struct svc_rqst *rqstp, int ignore_crossmnt) 2830 { 2831 struct xdr_buf dummy; 2832 struct xdr_stream xdr; 2833 __be32 ret; 2834 2835 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2836 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2837 ignore_crossmnt); 2838 *p = xdr.p; 2839 return ret; 2840 } 2841 2842 static inline int attributes_need_mount(u32 *bmval) 2843 { 2844 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2845 return 1; 2846 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2847 return 1; 2848 return 0; 2849 } 2850 2851 static __be32 2852 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2853 const char *name, int namlen) 2854 { 2855 struct svc_export *exp = cd->rd_fhp->fh_export; 2856 struct dentry *dentry; 2857 __be32 nfserr; 2858 int ignore_crossmnt = 0; 2859 2860 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2861 if (IS_ERR(dentry)) 2862 return nfserrno(PTR_ERR(dentry)); 2863 if (d_really_is_negative(dentry)) { 2864 /* 2865 * we're not holding the i_mutex here, so there's 2866 * a window where this directory entry could have gone 2867 * away. 2868 */ 2869 dput(dentry); 2870 return nfserr_noent; 2871 } 2872 2873 exp_get(exp); 2874 /* 2875 * In the case of a mountpoint, the client may be asking for 2876 * attributes that are only properties of the underlying filesystem 2877 * as opposed to the cross-mounted file system. In such a case, 2878 * we will not follow the cross mount and will fill the attribtutes 2879 * directly from the mountpoint dentry. 2880 */ 2881 if (nfsd_mountpoint(dentry, exp)) { 2882 int err; 2883 2884 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2885 && !attributes_need_mount(cd->rd_bmval)) { 2886 ignore_crossmnt = 1; 2887 goto out_encode; 2888 } 2889 /* 2890 * Why the heck aren't we just using nfsd_lookup?? 2891 * Different "."/".." handling? Something else? 2892 * At least, add a comment here to explain.... 2893 */ 2894 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2895 if (err) { 2896 nfserr = nfserrno(err); 2897 goto out_put; 2898 } 2899 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2900 if (nfserr) 2901 goto out_put; 2902 2903 } 2904 out_encode: 2905 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2906 cd->rd_rqstp, ignore_crossmnt); 2907 out_put: 2908 dput(dentry); 2909 exp_put(exp); 2910 return nfserr; 2911 } 2912 2913 static __be32 * 2914 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2915 { 2916 __be32 *p; 2917 2918 p = xdr_reserve_space(xdr, 20); 2919 if (!p) 2920 return NULL; 2921 *p++ = htonl(2); 2922 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2923 *p++ = htonl(0); /* bmval1 */ 2924 2925 *p++ = htonl(4); /* attribute length */ 2926 *p++ = nfserr; /* no htonl */ 2927 return p; 2928 } 2929 2930 static int 2931 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2932 loff_t offset, u64 ino, unsigned int d_type) 2933 { 2934 struct readdir_cd *ccd = ccdv; 2935 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2936 struct xdr_stream *xdr = cd->xdr; 2937 int start_offset = xdr->buf->len; 2938 int cookie_offset; 2939 u32 name_and_cookie; 2940 int entry_bytes; 2941 __be32 nfserr = nfserr_toosmall; 2942 __be64 wire_offset; 2943 __be32 *p; 2944 2945 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2946 if (name && isdotent(name, namlen)) { 2947 cd->common.err = nfs_ok; 2948 return 0; 2949 } 2950 2951 if (cd->cookie_offset) { 2952 wire_offset = cpu_to_be64(offset); 2953 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2954 &wire_offset, 8); 2955 } 2956 2957 p = xdr_reserve_space(xdr, 4); 2958 if (!p) 2959 goto fail; 2960 *p++ = xdr_one; /* mark entry present */ 2961 cookie_offset = xdr->buf->len; 2962 p = xdr_reserve_space(xdr, 3*4 + namlen); 2963 if (!p) 2964 goto fail; 2965 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2966 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2967 2968 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2969 switch (nfserr) { 2970 case nfs_ok: 2971 break; 2972 case nfserr_resource: 2973 nfserr = nfserr_toosmall; 2974 goto fail; 2975 case nfserr_noent: 2976 xdr_truncate_encode(xdr, start_offset); 2977 goto skip_entry; 2978 default: 2979 /* 2980 * If the client requested the RDATTR_ERROR attribute, 2981 * we stuff the error code into this attribute 2982 * and continue. If this attribute was not requested, 2983 * then in accordance with the spec, we fail the 2984 * entire READDIR operation(!) 2985 */ 2986 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2987 goto fail; 2988 p = nfsd4_encode_rdattr_error(xdr, nfserr); 2989 if (p == NULL) { 2990 nfserr = nfserr_toosmall; 2991 goto fail; 2992 } 2993 } 2994 nfserr = nfserr_toosmall; 2995 entry_bytes = xdr->buf->len - start_offset; 2996 if (entry_bytes > cd->rd_maxcount) 2997 goto fail; 2998 cd->rd_maxcount -= entry_bytes; 2999 /* 3000 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3001 * let's always let through the first entry, at least: 3002 */ 3003 if (!cd->rd_dircount) 3004 goto fail; 3005 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3006 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3007 goto fail; 3008 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3009 3010 cd->cookie_offset = cookie_offset; 3011 skip_entry: 3012 cd->common.err = nfs_ok; 3013 return 0; 3014 fail: 3015 xdr_truncate_encode(xdr, start_offset); 3016 cd->common.err = nfserr; 3017 return -EINVAL; 3018 } 3019 3020 static __be32 3021 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3022 { 3023 __be32 *p; 3024 3025 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3026 if (!p) 3027 return nfserr_resource; 3028 *p++ = cpu_to_be32(sid->si_generation); 3029 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3030 sizeof(stateid_opaque_t)); 3031 return 0; 3032 } 3033 3034 static __be32 3035 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3036 { 3037 struct xdr_stream *xdr = &resp->xdr; 3038 __be32 *p; 3039 3040 if (!nfserr) { 3041 p = xdr_reserve_space(xdr, 8); 3042 if (!p) 3043 return nfserr_resource; 3044 *p++ = cpu_to_be32(access->ac_supported); 3045 *p++ = cpu_to_be32(access->ac_resp_access); 3046 } 3047 return nfserr; 3048 } 3049 3050 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3051 { 3052 struct xdr_stream *xdr = &resp->xdr; 3053 __be32 *p; 3054 3055 if (!nfserr) { 3056 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3057 if (!p) 3058 return nfserr_resource; 3059 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3060 NFS4_MAX_SESSIONID_LEN); 3061 *p++ = cpu_to_be32(bcts->dir); 3062 /* Upshifting from TCP to RDMA is not supported */ 3063 *p++ = cpu_to_be32(0); 3064 } 3065 return nfserr; 3066 } 3067 3068 static __be32 3069 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3070 { 3071 struct xdr_stream *xdr = &resp->xdr; 3072 3073 if (!nfserr) 3074 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3075 3076 return nfserr; 3077 } 3078 3079 3080 static __be32 3081 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3082 { 3083 struct xdr_stream *xdr = &resp->xdr; 3084 __be32 *p; 3085 3086 if (!nfserr) { 3087 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3088 if (!p) 3089 return nfserr_resource; 3090 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3091 NFS4_VERIFIER_SIZE); 3092 } 3093 return nfserr; 3094 } 3095 3096 static __be32 3097 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3098 { 3099 struct xdr_stream *xdr = &resp->xdr; 3100 __be32 *p; 3101 3102 if (!nfserr) { 3103 p = xdr_reserve_space(xdr, 20); 3104 if (!p) 3105 return nfserr_resource; 3106 encode_cinfo(p, &create->cr_cinfo); 3107 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3108 create->cr_bmval[1], create->cr_bmval[2]); 3109 } 3110 return nfserr; 3111 } 3112 3113 static __be32 3114 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3115 { 3116 struct svc_fh *fhp = getattr->ga_fhp; 3117 struct xdr_stream *xdr = &resp->xdr; 3118 3119 if (nfserr) 3120 return nfserr; 3121 3122 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3123 getattr->ga_bmval, 3124 resp->rqstp, 0); 3125 return nfserr; 3126 } 3127 3128 static __be32 3129 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3130 { 3131 struct xdr_stream *xdr = &resp->xdr; 3132 struct svc_fh *fhp = *fhpp; 3133 unsigned int len; 3134 __be32 *p; 3135 3136 if (!nfserr) { 3137 len = fhp->fh_handle.fh_size; 3138 p = xdr_reserve_space(xdr, len + 4); 3139 if (!p) 3140 return nfserr_resource; 3141 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3142 } 3143 return nfserr; 3144 } 3145 3146 /* 3147 * Including all fields other than the name, a LOCK4denied structure requires 3148 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3149 */ 3150 static __be32 3151 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3152 { 3153 struct xdr_netobj *conf = &ld->ld_owner; 3154 __be32 *p; 3155 3156 again: 3157 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3158 if (!p) { 3159 /* 3160 * Don't fail to return the result just because we can't 3161 * return the conflicting open: 3162 */ 3163 if (conf->len) { 3164 kfree(conf->data); 3165 conf->len = 0; 3166 conf->data = NULL; 3167 goto again; 3168 } 3169 return nfserr_resource; 3170 } 3171 p = xdr_encode_hyper(p, ld->ld_start); 3172 p = xdr_encode_hyper(p, ld->ld_length); 3173 *p++ = cpu_to_be32(ld->ld_type); 3174 if (conf->len) { 3175 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3176 p = xdr_encode_opaque(p, conf->data, conf->len); 3177 kfree(conf->data); 3178 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3179 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3180 *p++ = cpu_to_be32(0); /* length of owner name */ 3181 } 3182 return nfserr_denied; 3183 } 3184 3185 static __be32 3186 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3187 { 3188 struct xdr_stream *xdr = &resp->xdr; 3189 3190 if (!nfserr) 3191 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3192 else if (nfserr == nfserr_denied) 3193 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3194 3195 return nfserr; 3196 } 3197 3198 static __be32 3199 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3200 { 3201 struct xdr_stream *xdr = &resp->xdr; 3202 3203 if (nfserr == nfserr_denied) 3204 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3205 return nfserr; 3206 } 3207 3208 static __be32 3209 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3210 { 3211 struct xdr_stream *xdr = &resp->xdr; 3212 3213 if (!nfserr) 3214 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3215 3216 return nfserr; 3217 } 3218 3219 3220 static __be32 3221 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3222 { 3223 struct xdr_stream *xdr = &resp->xdr; 3224 __be32 *p; 3225 3226 if (!nfserr) { 3227 p = xdr_reserve_space(xdr, 20); 3228 if (!p) 3229 return nfserr_resource; 3230 p = encode_cinfo(p, &link->li_cinfo); 3231 } 3232 return nfserr; 3233 } 3234 3235 3236 static __be32 3237 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3238 { 3239 struct xdr_stream *xdr = &resp->xdr; 3240 __be32 *p; 3241 3242 if (nfserr) 3243 goto out; 3244 3245 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3246 if (nfserr) 3247 goto out; 3248 p = xdr_reserve_space(xdr, 24); 3249 if (!p) 3250 return nfserr_resource; 3251 p = encode_cinfo(p, &open->op_cinfo); 3252 *p++ = cpu_to_be32(open->op_rflags); 3253 3254 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3255 open->op_bmval[2]); 3256 if (nfserr) 3257 goto out; 3258 3259 p = xdr_reserve_space(xdr, 4); 3260 if (!p) 3261 return nfserr_resource; 3262 3263 *p++ = cpu_to_be32(open->op_delegate_type); 3264 switch (open->op_delegate_type) { 3265 case NFS4_OPEN_DELEGATE_NONE: 3266 break; 3267 case NFS4_OPEN_DELEGATE_READ: 3268 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3269 if (nfserr) 3270 return nfserr; 3271 p = xdr_reserve_space(xdr, 20); 3272 if (!p) 3273 return nfserr_resource; 3274 *p++ = cpu_to_be32(open->op_recall); 3275 3276 /* 3277 * TODO: ACE's in delegations 3278 */ 3279 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3280 *p++ = cpu_to_be32(0); 3281 *p++ = cpu_to_be32(0); 3282 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3283 break; 3284 case NFS4_OPEN_DELEGATE_WRITE: 3285 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3286 if (nfserr) 3287 return nfserr; 3288 p = xdr_reserve_space(xdr, 32); 3289 if (!p) 3290 return nfserr_resource; 3291 *p++ = cpu_to_be32(0); 3292 3293 /* 3294 * TODO: space_limit's in delegations 3295 */ 3296 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3297 *p++ = cpu_to_be32(~(u32)0); 3298 *p++ = cpu_to_be32(~(u32)0); 3299 3300 /* 3301 * TODO: ACE's in delegations 3302 */ 3303 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3304 *p++ = cpu_to_be32(0); 3305 *p++ = cpu_to_be32(0); 3306 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3307 break; 3308 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3309 switch (open->op_why_no_deleg) { 3310 case WND4_CONTENTION: 3311 case WND4_RESOURCE: 3312 p = xdr_reserve_space(xdr, 8); 3313 if (!p) 3314 return nfserr_resource; 3315 *p++ = cpu_to_be32(open->op_why_no_deleg); 3316 /* deleg signaling not supported yet: */ 3317 *p++ = cpu_to_be32(0); 3318 break; 3319 default: 3320 p = xdr_reserve_space(xdr, 4); 3321 if (!p) 3322 return nfserr_resource; 3323 *p++ = cpu_to_be32(open->op_why_no_deleg); 3324 } 3325 break; 3326 default: 3327 BUG(); 3328 } 3329 /* XXX save filehandle here */ 3330 out: 3331 return nfserr; 3332 } 3333 3334 static __be32 3335 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3336 { 3337 struct xdr_stream *xdr = &resp->xdr; 3338 3339 if (!nfserr) 3340 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3341 3342 return nfserr; 3343 } 3344 3345 static __be32 3346 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3347 { 3348 struct xdr_stream *xdr = &resp->xdr; 3349 3350 if (!nfserr) 3351 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3352 3353 return nfserr; 3354 } 3355 3356 static __be32 nfsd4_encode_splice_read( 3357 struct nfsd4_compoundres *resp, 3358 struct nfsd4_read *read, 3359 struct file *file, unsigned long maxcount) 3360 { 3361 struct xdr_stream *xdr = &resp->xdr; 3362 struct xdr_buf *buf = xdr->buf; 3363 u32 eof; 3364 long len; 3365 int space_left; 3366 __be32 nfserr; 3367 __be32 *p = xdr->p - 2; 3368 3369 /* Make sure there will be room for padding if needed */ 3370 if (xdr->end - xdr->p < 1) 3371 return nfserr_resource; 3372 3373 len = maxcount; 3374 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3375 read->rd_offset, &maxcount); 3376 if (nfserr) { 3377 /* 3378 * nfsd_splice_actor may have already messed with the 3379 * page length; reset it so as not to confuse 3380 * xdr_truncate_encode: 3381 */ 3382 buf->page_len = 0; 3383 return nfserr; 3384 } 3385 3386 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3387 d_inode(read->rd_fhp->fh_dentry)->i_size); 3388 3389 *(p++) = htonl(eof); 3390 *(p++) = htonl(maxcount); 3391 3392 buf->page_len = maxcount; 3393 buf->len += maxcount; 3394 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3395 / PAGE_SIZE; 3396 3397 /* Use rest of head for padding and remaining ops: */ 3398 buf->tail[0].iov_base = xdr->p; 3399 buf->tail[0].iov_len = 0; 3400 xdr->iov = buf->tail; 3401 if (maxcount&3) { 3402 int pad = 4 - (maxcount&3); 3403 3404 *(xdr->p++) = 0; 3405 3406 buf->tail[0].iov_base += maxcount&3; 3407 buf->tail[0].iov_len = pad; 3408 buf->len += pad; 3409 } 3410 3411 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3412 buf->buflen - buf->len); 3413 buf->buflen = buf->len + space_left; 3414 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3415 3416 return 0; 3417 } 3418 3419 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3420 struct nfsd4_read *read, 3421 struct file *file, unsigned long maxcount) 3422 { 3423 struct xdr_stream *xdr = &resp->xdr; 3424 u32 eof; 3425 int v; 3426 int starting_len = xdr->buf->len - 8; 3427 long len; 3428 int thislen; 3429 __be32 nfserr; 3430 __be32 tmp; 3431 __be32 *p; 3432 u32 zzz = 0; 3433 int pad; 3434 3435 len = maxcount; 3436 v = 0; 3437 3438 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3439 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3440 WARN_ON_ONCE(!p); 3441 resp->rqstp->rq_vec[v].iov_base = p; 3442 resp->rqstp->rq_vec[v].iov_len = thislen; 3443 v++; 3444 len -= thislen; 3445 3446 while (len) { 3447 thislen = min_t(long, len, PAGE_SIZE); 3448 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3449 WARN_ON_ONCE(!p); 3450 resp->rqstp->rq_vec[v].iov_base = p; 3451 resp->rqstp->rq_vec[v].iov_len = thislen; 3452 v++; 3453 len -= thislen; 3454 } 3455 read->rd_vlen = v; 3456 3457 len = maxcount; 3458 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3459 read->rd_vlen, &maxcount); 3460 if (nfserr) 3461 return nfserr; 3462 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3463 3464 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3465 d_inode(read->rd_fhp->fh_dentry)->i_size); 3466 3467 tmp = htonl(eof); 3468 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3469 tmp = htonl(maxcount); 3470 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3471 3472 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3473 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3474 &zzz, pad); 3475 return 0; 3476 3477 } 3478 3479 static __be32 3480 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3481 struct nfsd4_read *read) 3482 { 3483 unsigned long maxcount; 3484 struct xdr_stream *xdr = &resp->xdr; 3485 struct file *file = read->rd_filp; 3486 int starting_len = xdr->buf->len; 3487 struct raparms *ra = NULL; 3488 __be32 *p; 3489 3490 if (nfserr) 3491 goto out; 3492 3493 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3494 if (!p) { 3495 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3496 nfserr = nfserr_resource; 3497 goto out; 3498 } 3499 if (resp->xdr.buf->page_len && 3500 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3501 WARN_ON_ONCE(1); 3502 nfserr = nfserr_resource; 3503 goto out; 3504 } 3505 xdr_commit_encode(xdr); 3506 3507 maxcount = svc_max_payload(resp->rqstp); 3508 maxcount = min_t(unsigned long, maxcount, 3509 (xdr->buf->buflen - xdr->buf->len)); 3510 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3511 3512 if (read->rd_tmp_file) 3513 ra = nfsd_init_raparms(file); 3514 3515 if (file->f_op->splice_read && 3516 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3517 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3518 else 3519 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3520 3521 if (ra) 3522 nfsd_put_raparams(file, ra); 3523 3524 if (nfserr) 3525 xdr_truncate_encode(xdr, starting_len); 3526 3527 out: 3528 if (file) 3529 fput(file); 3530 return nfserr; 3531 } 3532 3533 static __be32 3534 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3535 { 3536 int maxcount; 3537 __be32 wire_count; 3538 int zero = 0; 3539 struct xdr_stream *xdr = &resp->xdr; 3540 int length_offset = xdr->buf->len; 3541 __be32 *p; 3542 3543 if (nfserr) 3544 return nfserr; 3545 3546 p = xdr_reserve_space(xdr, 4); 3547 if (!p) 3548 return nfserr_resource; 3549 maxcount = PAGE_SIZE; 3550 3551 p = xdr_reserve_space(xdr, maxcount); 3552 if (!p) 3553 return nfserr_resource; 3554 /* 3555 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3556 * if they would overflow the buffer. Is this kosher in NFSv4? If 3557 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3558 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3559 */ 3560 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3561 (char *)p, &maxcount); 3562 if (nfserr == nfserr_isdir) 3563 nfserr = nfserr_inval; 3564 if (nfserr) { 3565 xdr_truncate_encode(xdr, length_offset); 3566 return nfserr; 3567 } 3568 3569 wire_count = htonl(maxcount); 3570 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3571 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3572 if (maxcount & 3) 3573 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3574 &zero, 4 - (maxcount&3)); 3575 return 0; 3576 } 3577 3578 static __be32 3579 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3580 { 3581 int maxcount; 3582 int bytes_left; 3583 loff_t offset; 3584 __be64 wire_offset; 3585 struct xdr_stream *xdr = &resp->xdr; 3586 int starting_len = xdr->buf->len; 3587 __be32 *p; 3588 3589 if (nfserr) 3590 return nfserr; 3591 3592 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3593 if (!p) 3594 return nfserr_resource; 3595 3596 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3597 *p++ = cpu_to_be32(0); 3598 *p++ = cpu_to_be32(0); 3599 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3600 - (char *)resp->xdr.buf->head[0].iov_base; 3601 3602 /* 3603 * Number of bytes left for directory entries allowing for the 3604 * final 8 bytes of the readdir and a following failed op: 3605 */ 3606 bytes_left = xdr->buf->buflen - xdr->buf->len 3607 - COMPOUND_ERR_SLACK_SPACE - 8; 3608 if (bytes_left < 0) { 3609 nfserr = nfserr_resource; 3610 goto err_no_verf; 3611 } 3612 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3613 /* 3614 * Note the rfc defines rd_maxcount as the size of the 3615 * READDIR4resok structure, which includes the verifier above 3616 * and the 8 bytes encoded at the end of this function: 3617 */ 3618 if (maxcount < 16) { 3619 nfserr = nfserr_toosmall; 3620 goto err_no_verf; 3621 } 3622 maxcount = min_t(int, maxcount-16, bytes_left); 3623 3624 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3625 if (!readdir->rd_dircount) 3626 readdir->rd_dircount = INT_MAX; 3627 3628 readdir->xdr = xdr; 3629 readdir->rd_maxcount = maxcount; 3630 readdir->common.err = 0; 3631 readdir->cookie_offset = 0; 3632 3633 offset = readdir->rd_cookie; 3634 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3635 &offset, 3636 &readdir->common, nfsd4_encode_dirent); 3637 if (nfserr == nfs_ok && 3638 readdir->common.err == nfserr_toosmall && 3639 xdr->buf->len == starting_len + 8) { 3640 /* nothing encoded; which limit did we hit?: */ 3641 if (maxcount - 16 < bytes_left) 3642 /* It was the fault of rd_maxcount: */ 3643 nfserr = nfserr_toosmall; 3644 else 3645 /* We ran out of buffer space: */ 3646 nfserr = nfserr_resource; 3647 } 3648 if (nfserr) 3649 goto err_no_verf; 3650 3651 if (readdir->cookie_offset) { 3652 wire_offset = cpu_to_be64(offset); 3653 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3654 &wire_offset, 8); 3655 } 3656 3657 p = xdr_reserve_space(xdr, 8); 3658 if (!p) { 3659 WARN_ON_ONCE(1); 3660 goto err_no_verf; 3661 } 3662 *p++ = 0; /* no more entries */ 3663 *p++ = htonl(readdir->common.err == nfserr_eof); 3664 3665 return 0; 3666 err_no_verf: 3667 xdr_truncate_encode(xdr, starting_len); 3668 return nfserr; 3669 } 3670 3671 static __be32 3672 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3673 { 3674 struct xdr_stream *xdr = &resp->xdr; 3675 __be32 *p; 3676 3677 if (!nfserr) { 3678 p = xdr_reserve_space(xdr, 20); 3679 if (!p) 3680 return nfserr_resource; 3681 p = encode_cinfo(p, &remove->rm_cinfo); 3682 } 3683 return nfserr; 3684 } 3685 3686 static __be32 3687 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3688 { 3689 struct xdr_stream *xdr = &resp->xdr; 3690 __be32 *p; 3691 3692 if (!nfserr) { 3693 p = xdr_reserve_space(xdr, 40); 3694 if (!p) 3695 return nfserr_resource; 3696 p = encode_cinfo(p, &rename->rn_sinfo); 3697 p = encode_cinfo(p, &rename->rn_tinfo); 3698 } 3699 return nfserr; 3700 } 3701 3702 static __be32 3703 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3704 __be32 nfserr, struct svc_export *exp) 3705 { 3706 u32 i, nflavs, supported; 3707 struct exp_flavor_info *flavs; 3708 struct exp_flavor_info def_flavs[2]; 3709 __be32 *p, *flavorsp; 3710 static bool report = true; 3711 3712 if (nfserr) 3713 goto out; 3714 nfserr = nfserr_resource; 3715 if (exp->ex_nflavors) { 3716 flavs = exp->ex_flavors; 3717 nflavs = exp->ex_nflavors; 3718 } else { /* Handling of some defaults in absence of real secinfo: */ 3719 flavs = def_flavs; 3720 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3721 nflavs = 2; 3722 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3723 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3724 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3725 nflavs = 1; 3726 flavs[0].pseudoflavor 3727 = svcauth_gss_flavor(exp->ex_client); 3728 } else { 3729 nflavs = 1; 3730 flavs[0].pseudoflavor 3731 = exp->ex_client->flavour->flavour; 3732 } 3733 } 3734 3735 supported = 0; 3736 p = xdr_reserve_space(xdr, 4); 3737 if (!p) 3738 goto out; 3739 flavorsp = p++; /* to be backfilled later */ 3740 3741 for (i = 0; i < nflavs; i++) { 3742 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3743 struct rpcsec_gss_info info; 3744 3745 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3746 supported++; 3747 p = xdr_reserve_space(xdr, 4 + 4 + 3748 XDR_LEN(info.oid.len) + 4 + 4); 3749 if (!p) 3750 goto out; 3751 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3752 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3753 *p++ = cpu_to_be32(info.qop); 3754 *p++ = cpu_to_be32(info.service); 3755 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3756 supported++; 3757 p = xdr_reserve_space(xdr, 4); 3758 if (!p) 3759 goto out; 3760 *p++ = cpu_to_be32(pf); 3761 } else { 3762 if (report) 3763 pr_warn("NFS: SECINFO: security flavor %u " 3764 "is not supported\n", pf); 3765 } 3766 } 3767 3768 if (nflavs != supported) 3769 report = false; 3770 *flavorsp = htonl(supported); 3771 nfserr = 0; 3772 out: 3773 if (exp) 3774 exp_put(exp); 3775 return nfserr; 3776 } 3777 3778 static __be32 3779 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3780 struct nfsd4_secinfo *secinfo) 3781 { 3782 struct xdr_stream *xdr = &resp->xdr; 3783 3784 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3785 } 3786 3787 static __be32 3788 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3789 struct nfsd4_secinfo_no_name *secinfo) 3790 { 3791 struct xdr_stream *xdr = &resp->xdr; 3792 3793 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3794 } 3795 3796 /* 3797 * The SETATTR encode routine is special -- it always encodes a bitmap, 3798 * regardless of the error status. 3799 */ 3800 static __be32 3801 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3802 { 3803 struct xdr_stream *xdr = &resp->xdr; 3804 __be32 *p; 3805 3806 p = xdr_reserve_space(xdr, 16); 3807 if (!p) 3808 return nfserr_resource; 3809 if (nfserr) { 3810 *p++ = cpu_to_be32(3); 3811 *p++ = cpu_to_be32(0); 3812 *p++ = cpu_to_be32(0); 3813 *p++ = cpu_to_be32(0); 3814 } 3815 else { 3816 *p++ = cpu_to_be32(3); 3817 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3818 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3819 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3820 } 3821 return nfserr; 3822 } 3823 3824 static __be32 3825 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3826 { 3827 struct xdr_stream *xdr = &resp->xdr; 3828 __be32 *p; 3829 3830 if (!nfserr) { 3831 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3832 if (!p) 3833 return nfserr_resource; 3834 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3835 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3836 NFS4_VERIFIER_SIZE); 3837 } 3838 else if (nfserr == nfserr_clid_inuse) { 3839 p = xdr_reserve_space(xdr, 8); 3840 if (!p) 3841 return nfserr_resource; 3842 *p++ = cpu_to_be32(0); 3843 *p++ = cpu_to_be32(0); 3844 } 3845 return nfserr; 3846 } 3847 3848 static __be32 3849 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3850 { 3851 struct xdr_stream *xdr = &resp->xdr; 3852 __be32 *p; 3853 3854 if (!nfserr) { 3855 p = xdr_reserve_space(xdr, 16); 3856 if (!p) 3857 return nfserr_resource; 3858 *p++ = cpu_to_be32(write->wr_bytes_written); 3859 *p++ = cpu_to_be32(write->wr_how_written); 3860 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3861 NFS4_VERIFIER_SIZE); 3862 } 3863 return nfserr; 3864 } 3865 3866 static __be32 3867 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3868 struct nfsd4_exchange_id *exid) 3869 { 3870 struct xdr_stream *xdr = &resp->xdr; 3871 __be32 *p; 3872 char *major_id; 3873 char *server_scope; 3874 int major_id_sz; 3875 int server_scope_sz; 3876 int status = 0; 3877 uint64_t minor_id = 0; 3878 3879 if (nfserr) 3880 return nfserr; 3881 3882 major_id = utsname()->nodename; 3883 major_id_sz = strlen(major_id); 3884 server_scope = utsname()->nodename; 3885 server_scope_sz = strlen(server_scope); 3886 3887 p = xdr_reserve_space(xdr, 3888 8 /* eir_clientid */ + 3889 4 /* eir_sequenceid */ + 3890 4 /* eir_flags */ + 3891 4 /* spr_how */); 3892 if (!p) 3893 return nfserr_resource; 3894 3895 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3896 *p++ = cpu_to_be32(exid->seqid); 3897 *p++ = cpu_to_be32(exid->flags); 3898 3899 *p++ = cpu_to_be32(exid->spa_how); 3900 3901 switch (exid->spa_how) { 3902 case SP4_NONE: 3903 break; 3904 case SP4_MACH_CRED: 3905 /* spo_must_enforce bitmap: */ 3906 status = nfsd4_encode_bitmap(xdr, 3907 exid->spo_must_enforce[0], 3908 exid->spo_must_enforce[1], 3909 exid->spo_must_enforce[2]); 3910 if (status) 3911 goto out; 3912 /* spo_must_allow bitmap: */ 3913 status = nfsd4_encode_bitmap(xdr, 3914 exid->spo_must_allow[0], 3915 exid->spo_must_allow[1], 3916 exid->spo_must_allow[2]); 3917 if (status) 3918 goto out; 3919 break; 3920 default: 3921 WARN_ON_ONCE(1); 3922 } 3923 3924 p = xdr_reserve_space(xdr, 3925 8 /* so_minor_id */ + 3926 4 /* so_major_id.len */ + 3927 (XDR_QUADLEN(major_id_sz) * 4) + 3928 4 /* eir_server_scope.len */ + 3929 (XDR_QUADLEN(server_scope_sz) * 4) + 3930 4 /* eir_server_impl_id.count (0) */); 3931 if (!p) 3932 return nfserr_resource; 3933 3934 /* The server_owner struct */ 3935 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3936 /* major id */ 3937 p = xdr_encode_opaque(p, major_id, major_id_sz); 3938 3939 /* Server scope */ 3940 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3941 3942 /* Implementation id */ 3943 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3944 return 0; 3945 out: 3946 return status; 3947 } 3948 3949 static __be32 3950 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3951 struct nfsd4_create_session *sess) 3952 { 3953 struct xdr_stream *xdr = &resp->xdr; 3954 __be32 *p; 3955 3956 if (nfserr) 3957 return nfserr; 3958 3959 p = xdr_reserve_space(xdr, 24); 3960 if (!p) 3961 return nfserr_resource; 3962 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3963 NFS4_MAX_SESSIONID_LEN); 3964 *p++ = cpu_to_be32(sess->seqid); 3965 *p++ = cpu_to_be32(sess->flags); 3966 3967 p = xdr_reserve_space(xdr, 28); 3968 if (!p) 3969 return nfserr_resource; 3970 *p++ = cpu_to_be32(0); /* headerpadsz */ 3971 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3972 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3973 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3974 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3975 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 3976 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 3977 3978 if (sess->fore_channel.nr_rdma_attrs) { 3979 p = xdr_reserve_space(xdr, 4); 3980 if (!p) 3981 return nfserr_resource; 3982 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 3983 } 3984 3985 p = xdr_reserve_space(xdr, 28); 3986 if (!p) 3987 return nfserr_resource; 3988 *p++ = cpu_to_be32(0); /* headerpadsz */ 3989 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 3990 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 3991 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 3992 *p++ = cpu_to_be32(sess->back_channel.maxops); 3993 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 3994 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 3995 3996 if (sess->back_channel.nr_rdma_attrs) { 3997 p = xdr_reserve_space(xdr, 4); 3998 if (!p) 3999 return nfserr_resource; 4000 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4001 } 4002 return 0; 4003 } 4004 4005 static __be32 4006 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4007 struct nfsd4_sequence *seq) 4008 { 4009 struct xdr_stream *xdr = &resp->xdr; 4010 __be32 *p; 4011 4012 if (nfserr) 4013 return nfserr; 4014 4015 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4016 if (!p) 4017 return nfserr_resource; 4018 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4019 NFS4_MAX_SESSIONID_LEN); 4020 *p++ = cpu_to_be32(seq->seqid); 4021 *p++ = cpu_to_be32(seq->slotid); 4022 /* Note slotid's are numbered from zero: */ 4023 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4024 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4025 *p++ = cpu_to_be32(seq->status_flags); 4026 4027 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4028 return 0; 4029 } 4030 4031 static __be32 4032 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4033 struct nfsd4_test_stateid *test_stateid) 4034 { 4035 struct xdr_stream *xdr = &resp->xdr; 4036 struct nfsd4_test_stateid_id *stateid, *next; 4037 __be32 *p; 4038 4039 if (nfserr) 4040 return nfserr; 4041 4042 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4043 if (!p) 4044 return nfserr_resource; 4045 *p++ = htonl(test_stateid->ts_num_ids); 4046 4047 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4048 *p++ = stateid->ts_id_status; 4049 } 4050 4051 return nfserr; 4052 } 4053 4054 #ifdef CONFIG_NFSD_PNFS 4055 static __be32 4056 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4057 struct nfsd4_getdeviceinfo *gdev) 4058 { 4059 struct xdr_stream *xdr = &resp->xdr; 4060 const struct nfsd4_layout_ops *ops = 4061 nfsd4_layout_ops[gdev->gd_layout_type]; 4062 u32 starting_len = xdr->buf->len, needed_len; 4063 __be32 *p; 4064 4065 dprintk("%s: err %d\n", __func__, nfserr); 4066 if (nfserr) 4067 goto out; 4068 4069 nfserr = nfserr_resource; 4070 p = xdr_reserve_space(xdr, 4); 4071 if (!p) 4072 goto out; 4073 4074 *p++ = cpu_to_be32(gdev->gd_layout_type); 4075 4076 /* If maxcount is 0 then just update notifications */ 4077 if (gdev->gd_maxcount != 0) { 4078 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4079 if (nfserr) { 4080 /* 4081 * We don't bother to burden the layout drivers with 4082 * enforcing gd_maxcount, just tell the client to 4083 * come back with a bigger buffer if it's not enough. 4084 */ 4085 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4086 goto toosmall; 4087 goto out; 4088 } 4089 } 4090 4091 nfserr = nfserr_resource; 4092 if (gdev->gd_notify_types) { 4093 p = xdr_reserve_space(xdr, 4 + 4); 4094 if (!p) 4095 goto out; 4096 *p++ = cpu_to_be32(1); /* bitmap length */ 4097 *p++ = cpu_to_be32(gdev->gd_notify_types); 4098 } else { 4099 p = xdr_reserve_space(xdr, 4); 4100 if (!p) 4101 goto out; 4102 *p++ = 0; 4103 } 4104 4105 nfserr = 0; 4106 out: 4107 kfree(gdev->gd_device); 4108 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4109 return nfserr; 4110 4111 toosmall: 4112 dprintk("%s: maxcount too small\n", __func__); 4113 needed_len = xdr->buf->len + 4 /* notifications */; 4114 xdr_truncate_encode(xdr, starting_len); 4115 p = xdr_reserve_space(xdr, 4); 4116 if (!p) { 4117 nfserr = nfserr_resource; 4118 } else { 4119 *p++ = cpu_to_be32(needed_len); 4120 nfserr = nfserr_toosmall; 4121 } 4122 goto out; 4123 } 4124 4125 static __be32 4126 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4127 struct nfsd4_layoutget *lgp) 4128 { 4129 struct xdr_stream *xdr = &resp->xdr; 4130 const struct nfsd4_layout_ops *ops = 4131 nfsd4_layout_ops[lgp->lg_layout_type]; 4132 __be32 *p; 4133 4134 dprintk("%s: err %d\n", __func__, nfserr); 4135 if (nfserr) 4136 goto out; 4137 4138 nfserr = nfserr_resource; 4139 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4140 if (!p) 4141 goto out; 4142 4143 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4144 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4145 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4146 sizeof(stateid_opaque_t)); 4147 4148 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4149 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4150 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4151 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4152 *p++ = cpu_to_be32(lgp->lg_layout_type); 4153 4154 nfserr = ops->encode_layoutget(xdr, lgp); 4155 out: 4156 kfree(lgp->lg_content); 4157 return nfserr; 4158 } 4159 4160 static __be32 4161 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4162 struct nfsd4_layoutcommit *lcp) 4163 { 4164 struct xdr_stream *xdr = &resp->xdr; 4165 __be32 *p; 4166 4167 if (nfserr) 4168 return nfserr; 4169 4170 p = xdr_reserve_space(xdr, 4); 4171 if (!p) 4172 return nfserr_resource; 4173 *p++ = cpu_to_be32(lcp->lc_size_chg); 4174 if (lcp->lc_size_chg) { 4175 p = xdr_reserve_space(xdr, 8); 4176 if (!p) 4177 return nfserr_resource; 4178 p = xdr_encode_hyper(p, lcp->lc_newsize); 4179 } 4180 4181 return nfs_ok; 4182 } 4183 4184 static __be32 4185 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4186 struct nfsd4_layoutreturn *lrp) 4187 { 4188 struct xdr_stream *xdr = &resp->xdr; 4189 __be32 *p; 4190 4191 if (nfserr) 4192 return nfserr; 4193 4194 p = xdr_reserve_space(xdr, 4); 4195 if (!p) 4196 return nfserr_resource; 4197 *p++ = cpu_to_be32(lrp->lrs_present); 4198 if (lrp->lrs_present) 4199 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4200 return nfs_ok; 4201 } 4202 #endif /* CONFIG_NFSD_PNFS */ 4203 4204 static __be32 4205 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4206 struct nfsd4_seek *seek) 4207 { 4208 __be32 *p; 4209 4210 if (nfserr) 4211 return nfserr; 4212 4213 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4214 *p++ = cpu_to_be32(seek->seek_eof); 4215 p = xdr_encode_hyper(p, seek->seek_pos); 4216 4217 return nfserr; 4218 } 4219 4220 static __be32 4221 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4222 { 4223 return nfserr; 4224 } 4225 4226 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4227 4228 /* 4229 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4230 * since we don't need to filter out obsolete ops as this is 4231 * done in the decoding phase. 4232 */ 4233 static nfsd4_enc nfsd4_enc_ops[] = { 4234 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4235 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4236 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4237 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4238 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4239 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4240 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4241 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4242 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4243 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4244 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4245 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4246 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4247 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4248 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4249 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4250 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4251 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4252 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4253 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4254 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4255 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4256 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4257 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4258 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4259 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4260 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4261 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4262 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4263 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4264 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4265 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4266 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4267 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4268 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4269 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4270 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4271 4272 /* NFSv4.1 operations */ 4273 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4274 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4275 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4276 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4277 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4278 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4279 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4280 #ifdef CONFIG_NFSD_PNFS 4281 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4282 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4283 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4284 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4285 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4286 #else 4287 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4288 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4289 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4290 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4291 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4292 #endif 4293 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4294 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4295 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4296 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4297 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4298 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4299 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4300 4301 /* NFSv4.2 operations */ 4302 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4303 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, 4304 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4305 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4306 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4307 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4308 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4309 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4310 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4311 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4312 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4313 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4314 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4315 }; 4316 4317 /* 4318 * Calculate whether we still have space to encode repsize bytes. 4319 * There are two considerations: 4320 * - For NFS versions >=4.1, the size of the reply must stay within 4321 * session limits 4322 * - For all NFS versions, we must stay within limited preallocated 4323 * buffer space. 4324 * 4325 * This is called before the operation is processed, so can only provide 4326 * an upper estimate. For some nonidempotent operations (such as 4327 * getattr), it's not necessarily a problem if that estimate is wrong, 4328 * as we can fail it after processing without significant side effects. 4329 */ 4330 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4331 { 4332 struct xdr_buf *buf = &resp->rqstp->rq_res; 4333 struct nfsd4_slot *slot = resp->cstate.slot; 4334 4335 if (buf->len + respsize <= buf->buflen) 4336 return nfs_ok; 4337 if (!nfsd4_has_session(&resp->cstate)) 4338 return nfserr_resource; 4339 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4340 WARN_ON_ONCE(1); 4341 return nfserr_rep_too_big_to_cache; 4342 } 4343 return nfserr_rep_too_big; 4344 } 4345 4346 void 4347 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4348 { 4349 struct xdr_stream *xdr = &resp->xdr; 4350 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4351 struct svc_rqst *rqstp = resp->rqstp; 4352 int post_err_offset; 4353 nfsd4_enc encoder; 4354 __be32 *p; 4355 4356 p = xdr_reserve_space(xdr, 8); 4357 if (!p) { 4358 WARN_ON_ONCE(1); 4359 return; 4360 } 4361 *p++ = cpu_to_be32(op->opnum); 4362 post_err_offset = xdr->buf->len; 4363 4364 if (op->opnum == OP_ILLEGAL) 4365 goto status; 4366 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4367 !nfsd4_enc_ops[op->opnum]); 4368 encoder = nfsd4_enc_ops[op->opnum]; 4369 op->status = encoder(resp, op->status, &op->u); 4370 xdr_commit_encode(xdr); 4371 4372 /* nfsd4_check_resp_size guarantees enough room for error status */ 4373 if (!op->status) { 4374 int space_needed = 0; 4375 if (!nfsd4_last_compound_op(rqstp)) 4376 space_needed = COMPOUND_ERR_SLACK_SPACE; 4377 op->status = nfsd4_check_resp_size(resp, space_needed); 4378 } 4379 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4380 struct nfsd4_slot *slot = resp->cstate.slot; 4381 4382 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4383 op->status = nfserr_rep_too_big_to_cache; 4384 else 4385 op->status = nfserr_rep_too_big; 4386 } 4387 if (op->status == nfserr_resource || 4388 op->status == nfserr_rep_too_big || 4389 op->status == nfserr_rep_too_big_to_cache) { 4390 /* 4391 * The operation may have already been encoded or 4392 * partially encoded. No op returns anything additional 4393 * in the case of one of these three errors, so we can 4394 * just truncate back to after the status. But it's a 4395 * bug if we had to do this on a non-idempotent op: 4396 */ 4397 warn_on_nonidempotent_op(op); 4398 xdr_truncate_encode(xdr, post_err_offset); 4399 } 4400 if (so) { 4401 int len = xdr->buf->len - post_err_offset; 4402 4403 so->so_replay.rp_status = op->status; 4404 so->so_replay.rp_buflen = len; 4405 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4406 so->so_replay.rp_buf, len); 4407 } 4408 status: 4409 /* Note that op->status is already in network byte order: */ 4410 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4411 } 4412 4413 /* 4414 * Encode the reply stored in the stateowner reply cache 4415 * 4416 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4417 * previously sent already encoded operation. 4418 */ 4419 void 4420 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4421 { 4422 __be32 *p; 4423 struct nfs4_replay *rp = op->replay; 4424 4425 BUG_ON(!rp); 4426 4427 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4428 if (!p) { 4429 WARN_ON_ONCE(1); 4430 return; 4431 } 4432 *p++ = cpu_to_be32(op->opnum); 4433 *p++ = rp->rp_status; /* already xdr'ed */ 4434 4435 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4436 } 4437 4438 int 4439 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4440 { 4441 return xdr_ressize_check(rqstp, p); 4442 } 4443 4444 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4445 { 4446 struct svc_rqst *rqstp = rq; 4447 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4448 4449 if (args->ops != args->iops) { 4450 kfree(args->ops); 4451 args->ops = args->iops; 4452 } 4453 kfree(args->tmpp); 4454 args->tmpp = NULL; 4455 while (args->to_free) { 4456 struct svcxdr_tmpbuf *tb = args->to_free; 4457 args->to_free = tb->next; 4458 kfree(tb); 4459 } 4460 return 1; 4461 } 4462 4463 int 4464 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4465 { 4466 if (rqstp->rq_arg.head[0].iov_len % 4) { 4467 /* client is nuts */ 4468 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4469 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4470 return 0; 4471 } 4472 args->p = p; 4473 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4474 args->pagelist = rqstp->rq_arg.pages; 4475 args->pagelen = rqstp->rq_arg.page_len; 4476 args->tmpp = NULL; 4477 args->to_free = NULL; 4478 args->ops = args->iops; 4479 args->rqstp = rqstp; 4480 4481 return !nfsd4_decode_compound(args); 4482 } 4483 4484 int 4485 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4486 { 4487 /* 4488 * All that remains is to write the tag and operation count... 4489 */ 4490 struct xdr_buf *buf = resp->xdr.buf; 4491 4492 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4493 buf->tail[0].iov_len); 4494 4495 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4496 4497 p = resp->tagp; 4498 *p++ = htonl(resp->taglen); 4499 memcpy(p, resp->tag, resp->taglen); 4500 p += XDR_QUADLEN(resp->taglen); 4501 *p++ = htonl(resp->opcnt); 4502 4503 nfsd4_sequence_done(resp); 4504 return 1; 4505 } 4506 4507 /* 4508 * Local variables: 4509 * c-basic-offset: 8 4510 * End: 4511 */ 4512