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 + 4); 1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1077 rename->rn_tnamelen = be32_to_cpup(p++); 1078 READ_BUF(rename->rn_tnamelen); 1079 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1080 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1081 return status; 1082 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1083 return status; 1084 1085 DECODE_TAIL; 1086 } 1087 1088 static __be32 1089 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1090 { 1091 DECODE_HEAD; 1092 1093 if (argp->minorversion >= 1) 1094 return nfserr_notsupp; 1095 1096 READ_BUF(sizeof(clientid_t)); 1097 COPYMEM(clientid, sizeof(clientid_t)); 1098 1099 DECODE_TAIL; 1100 } 1101 1102 static __be32 1103 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1104 struct nfsd4_secinfo *secinfo) 1105 { 1106 DECODE_HEAD; 1107 1108 READ_BUF(4); 1109 secinfo->si_namelen = be32_to_cpup(p++); 1110 READ_BUF(secinfo->si_namelen); 1111 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1112 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1113 if (status) 1114 return status; 1115 DECODE_TAIL; 1116 } 1117 1118 static __be32 1119 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1120 struct nfsd4_secinfo_no_name *sin) 1121 { 1122 DECODE_HEAD; 1123 1124 READ_BUF(4); 1125 sin->sin_style = be32_to_cpup(p++); 1126 DECODE_TAIL; 1127 } 1128 1129 static __be32 1130 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1131 { 1132 __be32 status; 1133 1134 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1135 if (status) 1136 return status; 1137 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1138 &setattr->sa_acl, &setattr->sa_label); 1139 } 1140 1141 static __be32 1142 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1143 { 1144 DECODE_HEAD; 1145 1146 if (argp->minorversion >= 1) 1147 return nfserr_notsupp; 1148 1149 READ_BUF(NFS4_VERIFIER_SIZE); 1150 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1151 1152 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1153 if (status) 1154 return nfserr_bad_xdr; 1155 READ_BUF(8); 1156 setclientid->se_callback_prog = be32_to_cpup(p++); 1157 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1158 1159 READ_BUF(setclientid->se_callback_netid_len + 4); 1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1161 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1162 1163 READ_BUF(setclientid->se_callback_addr_len + 4); 1164 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1165 setclientid->se_callback_ident = be32_to_cpup(p++); 1166 1167 DECODE_TAIL; 1168 } 1169 1170 static __be32 1171 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1172 { 1173 DECODE_HEAD; 1174 1175 if (argp->minorversion >= 1) 1176 return nfserr_notsupp; 1177 1178 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1179 COPYMEM(&scd_c->sc_clientid, 8); 1180 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1181 1182 DECODE_TAIL; 1183 } 1184 1185 /* Also used for NVERIFY */ 1186 static __be32 1187 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1188 { 1189 DECODE_HEAD; 1190 1191 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1192 goto out; 1193 1194 /* For convenience's sake, we compare raw xdr'd attributes in 1195 * nfsd4_proc_verify */ 1196 1197 READ_BUF(4); 1198 verify->ve_attrlen = be32_to_cpup(p++); 1199 READ_BUF(verify->ve_attrlen); 1200 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1201 1202 DECODE_TAIL; 1203 } 1204 1205 static __be32 1206 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1207 { 1208 int avail; 1209 int len; 1210 DECODE_HEAD; 1211 1212 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1213 if (status) 1214 return status; 1215 READ_BUF(16); 1216 p = xdr_decode_hyper(p, &write->wr_offset); 1217 write->wr_stable_how = be32_to_cpup(p++); 1218 if (write->wr_stable_how > 2) 1219 goto xdr_error; 1220 write->wr_buflen = be32_to_cpup(p++); 1221 1222 /* Sorry .. no magic macros for this.. * 1223 * READ_BUF(write->wr_buflen); 1224 * SAVEMEM(write->wr_buf, write->wr_buflen); 1225 */ 1226 avail = (char*)argp->end - (char*)argp->p; 1227 if (avail + argp->pagelen < write->wr_buflen) { 1228 dprintk("NFSD: xdr error (%s:%d)\n", 1229 __FILE__, __LINE__); 1230 goto xdr_error; 1231 } 1232 write->wr_head.iov_base = p; 1233 write->wr_head.iov_len = avail; 1234 write->wr_pagelist = argp->pagelist; 1235 1236 len = XDR_QUADLEN(write->wr_buflen) << 2; 1237 if (len >= avail) { 1238 int pages; 1239 1240 len -= avail; 1241 1242 pages = len >> PAGE_SHIFT; 1243 argp->pagelist += pages; 1244 argp->pagelen -= pages * PAGE_SIZE; 1245 len -= pages * PAGE_SIZE; 1246 1247 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1248 argp->pagelist++; 1249 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1250 } 1251 argp->p += XDR_QUADLEN(len); 1252 1253 DECODE_TAIL; 1254 } 1255 1256 static __be32 1257 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1258 { 1259 DECODE_HEAD; 1260 1261 if (argp->minorversion >= 1) 1262 return nfserr_notsupp; 1263 1264 READ_BUF(12); 1265 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1266 rlockowner->rl_owner.len = be32_to_cpup(p++); 1267 READ_BUF(rlockowner->rl_owner.len); 1268 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1269 1270 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1271 return nfserr_inval; 1272 DECODE_TAIL; 1273 } 1274 1275 static __be32 1276 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1277 struct nfsd4_exchange_id *exid) 1278 { 1279 int dummy, tmp; 1280 DECODE_HEAD; 1281 1282 READ_BUF(NFS4_VERIFIER_SIZE); 1283 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1284 1285 status = nfsd4_decode_opaque(argp, &exid->clname); 1286 if (status) 1287 return nfserr_bad_xdr; 1288 1289 READ_BUF(4); 1290 exid->flags = be32_to_cpup(p++); 1291 1292 /* Ignore state_protect4_a */ 1293 READ_BUF(4); 1294 exid->spa_how = be32_to_cpup(p++); 1295 switch (exid->spa_how) { 1296 case SP4_NONE: 1297 break; 1298 case SP4_MACH_CRED: 1299 /* spo_must_enforce */ 1300 READ_BUF(4); 1301 dummy = be32_to_cpup(p++); 1302 READ_BUF(dummy * 4); 1303 p += dummy; 1304 1305 /* spo_must_allow */ 1306 READ_BUF(4); 1307 dummy = be32_to_cpup(p++); 1308 READ_BUF(dummy * 4); 1309 p += dummy; 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 + 8); 1839 SAVEMEM(argp->tag, argp->taglen); 1840 argp->minorversion = be32_to_cpup(p++); 1841 argp->opcnt = be32_to_cpup(p++); 1842 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1843 1844 if (argp->taglen > NFSD4_MAX_TAGLEN) 1845 goto xdr_error; 1846 if (argp->opcnt > 100) 1847 goto xdr_error; 1848 1849 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1850 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1851 if (!argp->ops) { 1852 argp->ops = argp->iops; 1853 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1854 goto xdr_error; 1855 } 1856 } 1857 1858 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1859 argp->opcnt = 0; 1860 1861 for (i = 0; i < argp->opcnt; i++) { 1862 op = &argp->ops[i]; 1863 op->replay = NULL; 1864 1865 READ_BUF(4); 1866 op->opnum = be32_to_cpup(p++); 1867 1868 if (nfsd4_opnum_in_range(argp, op)) 1869 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1870 else { 1871 op->opnum = OP_ILLEGAL; 1872 op->status = nfserr_op_illegal; 1873 } 1874 /* 1875 * We'll try to cache the result in the DRC if any one 1876 * op in the compound wants to be cached: 1877 */ 1878 cachethis |= nfsd4_cache_this_op(op); 1879 1880 if (op->opnum == OP_READ) { 1881 readcount++; 1882 readbytes += nfsd4_max_reply(argp->rqstp, op); 1883 } else 1884 max_reply += nfsd4_max_reply(argp->rqstp, op); 1885 /* 1886 * OP_LOCK may return a conflicting lock. (Special case 1887 * because it will just skip encoding this if it runs 1888 * out of xdr buffer space, and it is the only operation 1889 * that behaves this way.) 1890 */ 1891 if (op->opnum == OP_LOCK) 1892 max_reply += NFS4_OPAQUE_LIMIT; 1893 1894 if (op->status) { 1895 argp->opcnt = i+1; 1896 break; 1897 } 1898 } 1899 /* Sessions make the DRC unnecessary: */ 1900 if (argp->minorversion) 1901 cachethis = false; 1902 svc_reserve(argp->rqstp, max_reply + readbytes); 1903 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1904 1905 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1906 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1907 1908 DECODE_TAIL; 1909 } 1910 1911 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1912 { 1913 if (IS_I_VERSION(inode)) { 1914 p = xdr_encode_hyper(p, inode->i_version); 1915 } else { 1916 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1917 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1918 } 1919 return p; 1920 } 1921 1922 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1923 { 1924 *p++ = cpu_to_be32(c->atomic); 1925 if (c->change_supported) { 1926 p = xdr_encode_hyper(p, c->before_change); 1927 p = xdr_encode_hyper(p, c->after_change); 1928 } else { 1929 *p++ = cpu_to_be32(c->before_ctime_sec); 1930 *p++ = cpu_to_be32(c->before_ctime_nsec); 1931 *p++ = cpu_to_be32(c->after_ctime_sec); 1932 *p++ = cpu_to_be32(c->after_ctime_nsec); 1933 } 1934 return p; 1935 } 1936 1937 /* Encode as an array of strings the string given with components 1938 * separated @sep, escaped with esc_enter and esc_exit. 1939 */ 1940 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1941 char *components, char esc_enter, 1942 char esc_exit) 1943 { 1944 __be32 *p; 1945 __be32 pathlen; 1946 int pathlen_offset; 1947 int strlen, count=0; 1948 char *str, *end, *next; 1949 1950 dprintk("nfsd4_encode_components(%s)\n", components); 1951 1952 pathlen_offset = xdr->buf->len; 1953 p = xdr_reserve_space(xdr, 4); 1954 if (!p) 1955 return nfserr_resource; 1956 p++; /* We will fill this in with @count later */ 1957 1958 end = str = components; 1959 while (*end) { 1960 bool found_esc = false; 1961 1962 /* try to parse as esc_start, ..., esc_end, sep */ 1963 if (*str == esc_enter) { 1964 for (; *end && (*end != esc_exit); end++) 1965 /* find esc_exit or end of string */; 1966 next = end + 1; 1967 if (*end && (!*next || *next == sep)) { 1968 str++; 1969 found_esc = true; 1970 } 1971 } 1972 1973 if (!found_esc) 1974 for (; *end && (*end != sep); end++) 1975 /* find sep or end of string */; 1976 1977 strlen = end - str; 1978 if (strlen) { 1979 p = xdr_reserve_space(xdr, strlen + 4); 1980 if (!p) 1981 return nfserr_resource; 1982 p = xdr_encode_opaque(p, str, strlen); 1983 count++; 1984 } 1985 else 1986 end++; 1987 if (found_esc) 1988 end = next; 1989 1990 str = end; 1991 } 1992 pathlen = htonl(count); 1993 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 1994 return 0; 1995 } 1996 1997 /* Encode as an array of strings the string given with components 1998 * separated @sep. 1999 */ 2000 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2001 char *components) 2002 { 2003 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2004 } 2005 2006 /* 2007 * encode a location element of a fs_locations structure 2008 */ 2009 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2010 struct nfsd4_fs_location *location) 2011 { 2012 __be32 status; 2013 2014 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2015 '[', ']'); 2016 if (status) 2017 return status; 2018 status = nfsd4_encode_components(xdr, '/', location->path); 2019 if (status) 2020 return status; 2021 return 0; 2022 } 2023 2024 /* 2025 * Encode a path in RFC3530 'pathname4' format 2026 */ 2027 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2028 const struct path *root, 2029 const struct path *path) 2030 { 2031 struct path cur = *path; 2032 __be32 *p; 2033 struct dentry **components = NULL; 2034 unsigned int ncomponents = 0; 2035 __be32 err = nfserr_jukebox; 2036 2037 dprintk("nfsd4_encode_components("); 2038 2039 path_get(&cur); 2040 /* First walk the path up to the nfsd root, and store the 2041 * dentries/path components in an array. 2042 */ 2043 for (;;) { 2044 if (path_equal(&cur, root)) 2045 break; 2046 if (cur.dentry == cur.mnt->mnt_root) { 2047 if (follow_up(&cur)) 2048 continue; 2049 goto out_free; 2050 } 2051 if ((ncomponents & 15) == 0) { 2052 struct dentry **new; 2053 new = krealloc(components, 2054 sizeof(*new) * (ncomponents + 16), 2055 GFP_KERNEL); 2056 if (!new) 2057 goto out_free; 2058 components = new; 2059 } 2060 components[ncomponents++] = cur.dentry; 2061 cur.dentry = dget_parent(cur.dentry); 2062 } 2063 err = nfserr_resource; 2064 p = xdr_reserve_space(xdr, 4); 2065 if (!p) 2066 goto out_free; 2067 *p++ = cpu_to_be32(ncomponents); 2068 2069 while (ncomponents) { 2070 struct dentry *dentry = components[ncomponents - 1]; 2071 unsigned int len; 2072 2073 spin_lock(&dentry->d_lock); 2074 len = dentry->d_name.len; 2075 p = xdr_reserve_space(xdr, len + 4); 2076 if (!p) { 2077 spin_unlock(&dentry->d_lock); 2078 goto out_free; 2079 } 2080 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2081 dprintk("/%pd", dentry); 2082 spin_unlock(&dentry->d_lock); 2083 dput(dentry); 2084 ncomponents--; 2085 } 2086 2087 err = 0; 2088 out_free: 2089 dprintk(")\n"); 2090 while (ncomponents) 2091 dput(components[--ncomponents]); 2092 kfree(components); 2093 path_put(&cur); 2094 return err; 2095 } 2096 2097 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2098 struct svc_rqst *rqstp, const struct path *path) 2099 { 2100 struct svc_export *exp_ps; 2101 __be32 res; 2102 2103 exp_ps = rqst_find_fsidzero_export(rqstp); 2104 if (IS_ERR(exp_ps)) 2105 return nfserrno(PTR_ERR(exp_ps)); 2106 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2107 exp_put(exp_ps); 2108 return res; 2109 } 2110 2111 /* 2112 * encode a fs_locations structure 2113 */ 2114 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2115 struct svc_rqst *rqstp, struct svc_export *exp) 2116 { 2117 __be32 status; 2118 int i; 2119 __be32 *p; 2120 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2121 2122 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2123 if (status) 2124 return status; 2125 p = xdr_reserve_space(xdr, 4); 2126 if (!p) 2127 return nfserr_resource; 2128 *p++ = cpu_to_be32(fslocs->locations_count); 2129 for (i=0; i<fslocs->locations_count; i++) { 2130 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2131 if (status) 2132 return status; 2133 } 2134 return 0; 2135 } 2136 2137 static u32 nfs4_file_type(umode_t mode) 2138 { 2139 switch (mode & S_IFMT) { 2140 case S_IFIFO: return NF4FIFO; 2141 case S_IFCHR: return NF4CHR; 2142 case S_IFDIR: return NF4DIR; 2143 case S_IFBLK: return NF4BLK; 2144 case S_IFLNK: return NF4LNK; 2145 case S_IFREG: return NF4REG; 2146 case S_IFSOCK: return NF4SOCK; 2147 default: return NF4BAD; 2148 }; 2149 } 2150 2151 static inline __be32 2152 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2153 struct nfs4_ace *ace) 2154 { 2155 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2156 return nfs4_acl_write_who(xdr, ace->whotype); 2157 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2158 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2159 else 2160 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2161 } 2162 2163 static inline __be32 2164 nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type) 2165 { 2166 __be32 *p; 2167 2168 if (layout_type) { 2169 p = xdr_reserve_space(xdr, 8); 2170 if (!p) 2171 return nfserr_resource; 2172 *p++ = cpu_to_be32(1); 2173 *p++ = cpu_to_be32(layout_type); 2174 } else { 2175 p = xdr_reserve_space(xdr, 4); 2176 if (!p) 2177 return nfserr_resource; 2178 *p++ = cpu_to_be32(0); 2179 } 2180 2181 return 0; 2182 } 2183 2184 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2185 FATTR4_WORD0_RDATTR_ERROR) 2186 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2187 #define WORD2_ABSENT_FS_ATTRS 0 2188 2189 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2190 static inline __be32 2191 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2192 void *context, int len) 2193 { 2194 __be32 *p; 2195 2196 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2197 if (!p) 2198 return nfserr_resource; 2199 2200 /* 2201 * For now we use a 0 here to indicate the null translation; in 2202 * the future we may place a call to translation code here. 2203 */ 2204 *p++ = cpu_to_be32(0); /* lfs */ 2205 *p++ = cpu_to_be32(0); /* pi */ 2206 p = xdr_encode_opaque(p, context, len); 2207 return 0; 2208 } 2209 #else 2210 static inline __be32 2211 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2212 void *context, int len) 2213 { return 0; } 2214 #endif 2215 2216 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2217 { 2218 /* As per referral draft: */ 2219 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2220 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2221 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2222 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2223 *rdattr_err = NFSERR_MOVED; 2224 else 2225 return nfserr_moved; 2226 } 2227 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2228 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2229 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2230 return 0; 2231 } 2232 2233 2234 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2235 { 2236 struct path path = exp->ex_path; 2237 int err; 2238 2239 path_get(&path); 2240 while (follow_up(&path)) { 2241 if (path.dentry != path.mnt->mnt_root) 2242 break; 2243 } 2244 err = vfs_getattr(&path, stat); 2245 path_put(&path); 2246 return err; 2247 } 2248 2249 static __be32 2250 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2251 { 2252 __be32 *p; 2253 2254 if (bmval2) { 2255 p = xdr_reserve_space(xdr, 16); 2256 if (!p) 2257 goto out_resource; 2258 *p++ = cpu_to_be32(3); 2259 *p++ = cpu_to_be32(bmval0); 2260 *p++ = cpu_to_be32(bmval1); 2261 *p++ = cpu_to_be32(bmval2); 2262 } else if (bmval1) { 2263 p = xdr_reserve_space(xdr, 12); 2264 if (!p) 2265 goto out_resource; 2266 *p++ = cpu_to_be32(2); 2267 *p++ = cpu_to_be32(bmval0); 2268 *p++ = cpu_to_be32(bmval1); 2269 } else { 2270 p = xdr_reserve_space(xdr, 8); 2271 if (!p) 2272 goto out_resource; 2273 *p++ = cpu_to_be32(1); 2274 *p++ = cpu_to_be32(bmval0); 2275 } 2276 2277 return 0; 2278 out_resource: 2279 return nfserr_resource; 2280 } 2281 2282 /* 2283 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2284 * ourselves. 2285 */ 2286 static __be32 2287 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2288 struct svc_export *exp, 2289 struct dentry *dentry, u32 *bmval, 2290 struct svc_rqst *rqstp, int ignore_crossmnt) 2291 { 2292 u32 bmval0 = bmval[0]; 2293 u32 bmval1 = bmval[1]; 2294 u32 bmval2 = bmval[2]; 2295 struct kstat stat; 2296 struct svc_fh *tempfh = NULL; 2297 struct kstatfs statfs; 2298 __be32 *p; 2299 int starting_len = xdr->buf->len; 2300 int attrlen_offset; 2301 __be32 attrlen; 2302 u32 dummy; 2303 u64 dummy64; 2304 u32 rdattr_err = 0; 2305 __be32 status; 2306 int err; 2307 struct nfs4_acl *acl = NULL; 2308 void *context = NULL; 2309 int contextlen; 2310 bool contextsupport = false; 2311 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2312 u32 minorversion = resp->cstate.minorversion; 2313 struct path path = { 2314 .mnt = exp->ex_path.mnt, 2315 .dentry = dentry, 2316 }; 2317 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2318 2319 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2320 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2321 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2322 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2323 2324 if (exp->ex_fslocs.migrated) { 2325 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2326 if (status) 2327 goto out; 2328 } 2329 2330 err = vfs_getattr(&path, &stat); 2331 if (err) 2332 goto out_nfserr; 2333 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2334 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2335 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2336 FATTR4_WORD1_SPACE_TOTAL))) { 2337 err = vfs_statfs(&path, &statfs); 2338 if (err) 2339 goto out_nfserr; 2340 } 2341 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2342 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2343 status = nfserr_jukebox; 2344 if (!tempfh) 2345 goto out; 2346 fh_init(tempfh, NFS4_FHSIZE); 2347 status = fh_compose(tempfh, exp, dentry, NULL); 2348 if (status) 2349 goto out; 2350 fhp = tempfh; 2351 } 2352 if (bmval0 & FATTR4_WORD0_ACL) { 2353 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2354 if (err == -EOPNOTSUPP) 2355 bmval0 &= ~FATTR4_WORD0_ACL; 2356 else if (err == -EINVAL) { 2357 status = nfserr_attrnotsupp; 2358 goto out; 2359 } else if (err != 0) 2360 goto out_nfserr; 2361 } 2362 2363 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2364 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2365 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2366 err = security_inode_getsecctx(d_inode(dentry), 2367 &context, &contextlen); 2368 contextsupport = (err == 0); 2369 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2370 if (err == -EOPNOTSUPP) 2371 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2372 else if (err) 2373 goto out_nfserr; 2374 } 2375 } 2376 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2377 2378 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2379 if (status) 2380 goto out; 2381 2382 attrlen_offset = xdr->buf->len; 2383 p = xdr_reserve_space(xdr, 4); 2384 if (!p) 2385 goto out_resource; 2386 p++; /* to be backfilled later */ 2387 2388 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2389 u32 word0 = nfsd_suppattrs0(minorversion); 2390 u32 word1 = nfsd_suppattrs1(minorversion); 2391 u32 word2 = nfsd_suppattrs2(minorversion); 2392 2393 if (!IS_POSIXACL(dentry->d_inode)) 2394 word0 &= ~FATTR4_WORD0_ACL; 2395 if (!contextsupport) 2396 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2397 if (!word2) { 2398 p = xdr_reserve_space(xdr, 12); 2399 if (!p) 2400 goto out_resource; 2401 *p++ = cpu_to_be32(2); 2402 *p++ = cpu_to_be32(word0); 2403 *p++ = cpu_to_be32(word1); 2404 } else { 2405 p = xdr_reserve_space(xdr, 16); 2406 if (!p) 2407 goto out_resource; 2408 *p++ = cpu_to_be32(3); 2409 *p++ = cpu_to_be32(word0); 2410 *p++ = cpu_to_be32(word1); 2411 *p++ = cpu_to_be32(word2); 2412 } 2413 } 2414 if (bmval0 & FATTR4_WORD0_TYPE) { 2415 p = xdr_reserve_space(xdr, 4); 2416 if (!p) 2417 goto out_resource; 2418 dummy = nfs4_file_type(stat.mode); 2419 if (dummy == NF4BAD) { 2420 status = nfserr_serverfault; 2421 goto out; 2422 } 2423 *p++ = cpu_to_be32(dummy); 2424 } 2425 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2426 p = xdr_reserve_space(xdr, 4); 2427 if (!p) 2428 goto out_resource; 2429 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2430 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2431 else 2432 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2433 NFS4_FH_VOL_RENAME); 2434 } 2435 if (bmval0 & FATTR4_WORD0_CHANGE) { 2436 p = xdr_reserve_space(xdr, 8); 2437 if (!p) 2438 goto out_resource; 2439 p = encode_change(p, &stat, d_inode(dentry)); 2440 } 2441 if (bmval0 & FATTR4_WORD0_SIZE) { 2442 p = xdr_reserve_space(xdr, 8); 2443 if (!p) 2444 goto out_resource; 2445 p = xdr_encode_hyper(p, stat.size); 2446 } 2447 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2448 p = xdr_reserve_space(xdr, 4); 2449 if (!p) 2450 goto out_resource; 2451 *p++ = cpu_to_be32(1); 2452 } 2453 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2454 p = xdr_reserve_space(xdr, 4); 2455 if (!p) 2456 goto out_resource; 2457 *p++ = cpu_to_be32(1); 2458 } 2459 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2460 p = xdr_reserve_space(xdr, 4); 2461 if (!p) 2462 goto out_resource; 2463 *p++ = cpu_to_be32(0); 2464 } 2465 if (bmval0 & FATTR4_WORD0_FSID) { 2466 p = xdr_reserve_space(xdr, 16); 2467 if (!p) 2468 goto out_resource; 2469 if (exp->ex_fslocs.migrated) { 2470 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2471 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2472 } else switch(fsid_source(fhp)) { 2473 case FSIDSOURCE_FSID: 2474 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2475 p = xdr_encode_hyper(p, (u64)0); 2476 break; 2477 case FSIDSOURCE_DEV: 2478 *p++ = cpu_to_be32(0); 2479 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2480 *p++ = cpu_to_be32(0); 2481 *p++ = cpu_to_be32(MINOR(stat.dev)); 2482 break; 2483 case FSIDSOURCE_UUID: 2484 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2485 EX_UUID_LEN); 2486 break; 2487 } 2488 } 2489 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2490 p = xdr_reserve_space(xdr, 4); 2491 if (!p) 2492 goto out_resource; 2493 *p++ = cpu_to_be32(0); 2494 } 2495 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2496 p = xdr_reserve_space(xdr, 4); 2497 if (!p) 2498 goto out_resource; 2499 *p++ = cpu_to_be32(nn->nfsd4_lease); 2500 } 2501 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2502 p = xdr_reserve_space(xdr, 4); 2503 if (!p) 2504 goto out_resource; 2505 *p++ = cpu_to_be32(rdattr_err); 2506 } 2507 if (bmval0 & FATTR4_WORD0_ACL) { 2508 struct nfs4_ace *ace; 2509 2510 if (acl == NULL) { 2511 p = xdr_reserve_space(xdr, 4); 2512 if (!p) 2513 goto out_resource; 2514 2515 *p++ = cpu_to_be32(0); 2516 goto out_acl; 2517 } 2518 p = xdr_reserve_space(xdr, 4); 2519 if (!p) 2520 goto out_resource; 2521 *p++ = cpu_to_be32(acl->naces); 2522 2523 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2524 p = xdr_reserve_space(xdr, 4*3); 2525 if (!p) 2526 goto out_resource; 2527 *p++ = cpu_to_be32(ace->type); 2528 *p++ = cpu_to_be32(ace->flag); 2529 *p++ = cpu_to_be32(ace->access_mask & 2530 NFS4_ACE_MASK_ALL); 2531 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2532 if (status) 2533 goto out; 2534 } 2535 } 2536 out_acl: 2537 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2538 p = xdr_reserve_space(xdr, 4); 2539 if (!p) 2540 goto out_resource; 2541 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2542 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2543 } 2544 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2545 p = xdr_reserve_space(xdr, 4); 2546 if (!p) 2547 goto out_resource; 2548 *p++ = cpu_to_be32(1); 2549 } 2550 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2551 p = xdr_reserve_space(xdr, 4); 2552 if (!p) 2553 goto out_resource; 2554 *p++ = cpu_to_be32(0); 2555 } 2556 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2557 p = xdr_reserve_space(xdr, 4); 2558 if (!p) 2559 goto out_resource; 2560 *p++ = cpu_to_be32(1); 2561 } 2562 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2563 p = xdr_reserve_space(xdr, 4); 2564 if (!p) 2565 goto out_resource; 2566 *p++ = cpu_to_be32(1); 2567 } 2568 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2569 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2570 if (!p) 2571 goto out_resource; 2572 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2573 fhp->fh_handle.fh_size); 2574 } 2575 if (bmval0 & FATTR4_WORD0_FILEID) { 2576 p = xdr_reserve_space(xdr, 8); 2577 if (!p) 2578 goto out_resource; 2579 p = xdr_encode_hyper(p, stat.ino); 2580 } 2581 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2582 p = xdr_reserve_space(xdr, 8); 2583 if (!p) 2584 goto out_resource; 2585 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2586 } 2587 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2588 p = xdr_reserve_space(xdr, 8); 2589 if (!p) 2590 goto out_resource; 2591 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2592 } 2593 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2594 p = xdr_reserve_space(xdr, 8); 2595 if (!p) 2596 goto out_resource; 2597 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2598 } 2599 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2600 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2601 if (status) 2602 goto out; 2603 } 2604 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2605 p = xdr_reserve_space(xdr, 4); 2606 if (!p) 2607 goto out_resource; 2608 *p++ = cpu_to_be32(1); 2609 } 2610 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2611 p = xdr_reserve_space(xdr, 8); 2612 if (!p) 2613 goto out_resource; 2614 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2615 } 2616 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2617 p = xdr_reserve_space(xdr, 4); 2618 if (!p) 2619 goto out_resource; 2620 *p++ = cpu_to_be32(255); 2621 } 2622 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2623 p = xdr_reserve_space(xdr, 4); 2624 if (!p) 2625 goto out_resource; 2626 *p++ = cpu_to_be32(statfs.f_namelen); 2627 } 2628 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2629 p = xdr_reserve_space(xdr, 8); 2630 if (!p) 2631 goto out_resource; 2632 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2633 } 2634 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2635 p = xdr_reserve_space(xdr, 8); 2636 if (!p) 2637 goto out_resource; 2638 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2639 } 2640 if (bmval1 & FATTR4_WORD1_MODE) { 2641 p = xdr_reserve_space(xdr, 4); 2642 if (!p) 2643 goto out_resource; 2644 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2645 } 2646 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2647 p = xdr_reserve_space(xdr, 4); 2648 if (!p) 2649 goto out_resource; 2650 *p++ = cpu_to_be32(1); 2651 } 2652 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2653 p = xdr_reserve_space(xdr, 4); 2654 if (!p) 2655 goto out_resource; 2656 *p++ = cpu_to_be32(stat.nlink); 2657 } 2658 if (bmval1 & FATTR4_WORD1_OWNER) { 2659 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2660 if (status) 2661 goto out; 2662 } 2663 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2664 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2665 if (status) 2666 goto out; 2667 } 2668 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2669 p = xdr_reserve_space(xdr, 8); 2670 if (!p) 2671 goto out_resource; 2672 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2673 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2674 } 2675 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2676 p = xdr_reserve_space(xdr, 8); 2677 if (!p) 2678 goto out_resource; 2679 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2680 p = xdr_encode_hyper(p, dummy64); 2681 } 2682 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2683 p = xdr_reserve_space(xdr, 8); 2684 if (!p) 2685 goto out_resource; 2686 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2687 p = xdr_encode_hyper(p, dummy64); 2688 } 2689 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2690 p = xdr_reserve_space(xdr, 8); 2691 if (!p) 2692 goto out_resource; 2693 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2694 p = xdr_encode_hyper(p, dummy64); 2695 } 2696 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2697 p = xdr_reserve_space(xdr, 8); 2698 if (!p) 2699 goto out_resource; 2700 dummy64 = (u64)stat.blocks << 9; 2701 p = xdr_encode_hyper(p, dummy64); 2702 } 2703 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2704 p = xdr_reserve_space(xdr, 12); 2705 if (!p) 2706 goto out_resource; 2707 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2708 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2709 } 2710 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2711 p = xdr_reserve_space(xdr, 12); 2712 if (!p) 2713 goto out_resource; 2714 *p++ = cpu_to_be32(0); 2715 *p++ = cpu_to_be32(1); 2716 *p++ = cpu_to_be32(0); 2717 } 2718 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2719 p = xdr_reserve_space(xdr, 12); 2720 if (!p) 2721 goto out_resource; 2722 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2723 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2724 } 2725 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2726 p = xdr_reserve_space(xdr, 12); 2727 if (!p) 2728 goto out_resource; 2729 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2730 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2731 } 2732 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2733 struct kstat parent_stat; 2734 u64 ino = stat.ino; 2735 2736 p = xdr_reserve_space(xdr, 8); 2737 if (!p) 2738 goto out_resource; 2739 /* 2740 * Get parent's attributes if not ignoring crossmount 2741 * and this is the root of a cross-mounted filesystem. 2742 */ 2743 if (ignore_crossmnt == 0 && 2744 dentry == exp->ex_path.mnt->mnt_root) { 2745 err = get_parent_attributes(exp, &parent_stat); 2746 if (err) 2747 goto out_nfserr; 2748 ino = parent_stat.ino; 2749 } 2750 p = xdr_encode_hyper(p, ino); 2751 } 2752 #ifdef CONFIG_NFSD_PNFS 2753 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2754 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type); 2755 if (status) 2756 goto out; 2757 } 2758 2759 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2760 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type); 2761 if (status) 2762 goto out; 2763 } 2764 2765 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2766 p = xdr_reserve_space(xdr, 4); 2767 if (!p) 2768 goto out_resource; 2769 *p++ = cpu_to_be32(stat.blksize); 2770 } 2771 #endif /* CONFIG_NFSD_PNFS */ 2772 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2773 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0, 2774 NFSD_SUPPATTR_EXCLCREAT_WORD1, 2775 NFSD_SUPPATTR_EXCLCREAT_WORD2); 2776 if (status) 2777 goto out; 2778 } 2779 2780 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2781 status = nfsd4_encode_security_label(xdr, rqstp, context, 2782 contextlen); 2783 if (status) 2784 goto out; 2785 } 2786 2787 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2788 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2789 status = nfs_ok; 2790 2791 out: 2792 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2793 if (context) 2794 security_release_secctx(context, contextlen); 2795 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2796 kfree(acl); 2797 if (tempfh) { 2798 fh_put(tempfh); 2799 kfree(tempfh); 2800 } 2801 if (status) 2802 xdr_truncate_encode(xdr, starting_len); 2803 return status; 2804 out_nfserr: 2805 status = nfserrno(err); 2806 goto out; 2807 out_resource: 2808 status = nfserr_resource; 2809 goto out; 2810 } 2811 2812 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2813 struct xdr_buf *buf, __be32 *p, int bytes) 2814 { 2815 xdr->scratch.iov_len = 0; 2816 memset(buf, 0, sizeof(struct xdr_buf)); 2817 buf->head[0].iov_base = p; 2818 buf->head[0].iov_len = 0; 2819 buf->len = 0; 2820 xdr->buf = buf; 2821 xdr->iov = buf->head; 2822 xdr->p = p; 2823 xdr->end = (void *)p + bytes; 2824 buf->buflen = bytes; 2825 } 2826 2827 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2828 struct svc_fh *fhp, struct svc_export *exp, 2829 struct dentry *dentry, u32 *bmval, 2830 struct svc_rqst *rqstp, int ignore_crossmnt) 2831 { 2832 struct xdr_buf dummy; 2833 struct xdr_stream xdr; 2834 __be32 ret; 2835 2836 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2837 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2838 ignore_crossmnt); 2839 *p = xdr.p; 2840 return ret; 2841 } 2842 2843 static inline int attributes_need_mount(u32 *bmval) 2844 { 2845 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2846 return 1; 2847 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2848 return 1; 2849 return 0; 2850 } 2851 2852 static __be32 2853 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2854 const char *name, int namlen) 2855 { 2856 struct svc_export *exp = cd->rd_fhp->fh_export; 2857 struct dentry *dentry; 2858 __be32 nfserr; 2859 int ignore_crossmnt = 0; 2860 2861 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2862 if (IS_ERR(dentry)) 2863 return nfserrno(PTR_ERR(dentry)); 2864 if (d_really_is_negative(dentry)) { 2865 /* 2866 * we're not holding the i_mutex here, so there's 2867 * a window where this directory entry could have gone 2868 * away. 2869 */ 2870 dput(dentry); 2871 return nfserr_noent; 2872 } 2873 2874 exp_get(exp); 2875 /* 2876 * In the case of a mountpoint, the client may be asking for 2877 * attributes that are only properties of the underlying filesystem 2878 * as opposed to the cross-mounted file system. In such a case, 2879 * we will not follow the cross mount and will fill the attribtutes 2880 * directly from the mountpoint dentry. 2881 */ 2882 if (nfsd_mountpoint(dentry, exp)) { 2883 int err; 2884 2885 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2886 && !attributes_need_mount(cd->rd_bmval)) { 2887 ignore_crossmnt = 1; 2888 goto out_encode; 2889 } 2890 /* 2891 * Why the heck aren't we just using nfsd_lookup?? 2892 * Different "."/".." handling? Something else? 2893 * At least, add a comment here to explain.... 2894 */ 2895 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2896 if (err) { 2897 nfserr = nfserrno(err); 2898 goto out_put; 2899 } 2900 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2901 if (nfserr) 2902 goto out_put; 2903 2904 } 2905 out_encode: 2906 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2907 cd->rd_rqstp, ignore_crossmnt); 2908 out_put: 2909 dput(dentry); 2910 exp_put(exp); 2911 return nfserr; 2912 } 2913 2914 static __be32 * 2915 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2916 { 2917 __be32 *p; 2918 2919 p = xdr_reserve_space(xdr, 20); 2920 if (!p) 2921 return NULL; 2922 *p++ = htonl(2); 2923 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2924 *p++ = htonl(0); /* bmval1 */ 2925 2926 *p++ = htonl(4); /* attribute length */ 2927 *p++ = nfserr; /* no htonl */ 2928 return p; 2929 } 2930 2931 static int 2932 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2933 loff_t offset, u64 ino, unsigned int d_type) 2934 { 2935 struct readdir_cd *ccd = ccdv; 2936 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2937 struct xdr_stream *xdr = cd->xdr; 2938 int start_offset = xdr->buf->len; 2939 int cookie_offset; 2940 u32 name_and_cookie; 2941 int entry_bytes; 2942 __be32 nfserr = nfserr_toosmall; 2943 __be64 wire_offset; 2944 __be32 *p; 2945 2946 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2947 if (name && isdotent(name, namlen)) { 2948 cd->common.err = nfs_ok; 2949 return 0; 2950 } 2951 2952 if (cd->cookie_offset) { 2953 wire_offset = cpu_to_be64(offset); 2954 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2955 &wire_offset, 8); 2956 } 2957 2958 p = xdr_reserve_space(xdr, 4); 2959 if (!p) 2960 goto fail; 2961 *p++ = xdr_one; /* mark entry present */ 2962 cookie_offset = xdr->buf->len; 2963 p = xdr_reserve_space(xdr, 3*4 + namlen); 2964 if (!p) 2965 goto fail; 2966 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2967 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2968 2969 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2970 switch (nfserr) { 2971 case nfs_ok: 2972 break; 2973 case nfserr_resource: 2974 nfserr = nfserr_toosmall; 2975 goto fail; 2976 case nfserr_noent: 2977 xdr_truncate_encode(xdr, start_offset); 2978 goto skip_entry; 2979 default: 2980 /* 2981 * If the client requested the RDATTR_ERROR attribute, 2982 * we stuff the error code into this attribute 2983 * and continue. If this attribute was not requested, 2984 * then in accordance with the spec, we fail the 2985 * entire READDIR operation(!) 2986 */ 2987 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2988 goto fail; 2989 p = nfsd4_encode_rdattr_error(xdr, nfserr); 2990 if (p == NULL) { 2991 nfserr = nfserr_toosmall; 2992 goto fail; 2993 } 2994 } 2995 nfserr = nfserr_toosmall; 2996 entry_bytes = xdr->buf->len - start_offset; 2997 if (entry_bytes > cd->rd_maxcount) 2998 goto fail; 2999 cd->rd_maxcount -= entry_bytes; 3000 /* 3001 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3002 * let's always let through the first entry, at least: 3003 */ 3004 if (!cd->rd_dircount) 3005 goto fail; 3006 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3007 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3008 goto fail; 3009 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3010 3011 cd->cookie_offset = cookie_offset; 3012 skip_entry: 3013 cd->common.err = nfs_ok; 3014 return 0; 3015 fail: 3016 xdr_truncate_encode(xdr, start_offset); 3017 cd->common.err = nfserr; 3018 return -EINVAL; 3019 } 3020 3021 static __be32 3022 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3023 { 3024 __be32 *p; 3025 3026 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3027 if (!p) 3028 return nfserr_resource; 3029 *p++ = cpu_to_be32(sid->si_generation); 3030 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3031 sizeof(stateid_opaque_t)); 3032 return 0; 3033 } 3034 3035 static __be32 3036 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3037 { 3038 struct xdr_stream *xdr = &resp->xdr; 3039 __be32 *p; 3040 3041 if (!nfserr) { 3042 p = xdr_reserve_space(xdr, 8); 3043 if (!p) 3044 return nfserr_resource; 3045 *p++ = cpu_to_be32(access->ac_supported); 3046 *p++ = cpu_to_be32(access->ac_resp_access); 3047 } 3048 return nfserr; 3049 } 3050 3051 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3052 { 3053 struct xdr_stream *xdr = &resp->xdr; 3054 __be32 *p; 3055 3056 if (!nfserr) { 3057 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3058 if (!p) 3059 return nfserr_resource; 3060 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3061 NFS4_MAX_SESSIONID_LEN); 3062 *p++ = cpu_to_be32(bcts->dir); 3063 /* Sorry, we do not yet support RDMA over 4.1: */ 3064 *p++ = cpu_to_be32(0); 3065 } 3066 return nfserr; 3067 } 3068 3069 static __be32 3070 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3071 { 3072 struct xdr_stream *xdr = &resp->xdr; 3073 3074 if (!nfserr) 3075 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3076 3077 return nfserr; 3078 } 3079 3080 3081 static __be32 3082 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3083 { 3084 struct xdr_stream *xdr = &resp->xdr; 3085 __be32 *p; 3086 3087 if (!nfserr) { 3088 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3089 if (!p) 3090 return nfserr_resource; 3091 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3092 NFS4_VERIFIER_SIZE); 3093 } 3094 return nfserr; 3095 } 3096 3097 static __be32 3098 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3099 { 3100 struct xdr_stream *xdr = &resp->xdr; 3101 __be32 *p; 3102 3103 if (!nfserr) { 3104 p = xdr_reserve_space(xdr, 20); 3105 if (!p) 3106 return nfserr_resource; 3107 encode_cinfo(p, &create->cr_cinfo); 3108 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3109 create->cr_bmval[1], create->cr_bmval[2]); 3110 } 3111 return nfserr; 3112 } 3113 3114 static __be32 3115 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3116 { 3117 struct svc_fh *fhp = getattr->ga_fhp; 3118 struct xdr_stream *xdr = &resp->xdr; 3119 3120 if (nfserr) 3121 return nfserr; 3122 3123 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3124 getattr->ga_bmval, 3125 resp->rqstp, 0); 3126 return nfserr; 3127 } 3128 3129 static __be32 3130 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3131 { 3132 struct xdr_stream *xdr = &resp->xdr; 3133 struct svc_fh *fhp = *fhpp; 3134 unsigned int len; 3135 __be32 *p; 3136 3137 if (!nfserr) { 3138 len = fhp->fh_handle.fh_size; 3139 p = xdr_reserve_space(xdr, len + 4); 3140 if (!p) 3141 return nfserr_resource; 3142 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3143 } 3144 return nfserr; 3145 } 3146 3147 /* 3148 * Including all fields other than the name, a LOCK4denied structure requires 3149 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3150 */ 3151 static __be32 3152 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3153 { 3154 struct xdr_netobj *conf = &ld->ld_owner; 3155 __be32 *p; 3156 3157 again: 3158 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3159 if (!p) { 3160 /* 3161 * Don't fail to return the result just because we can't 3162 * return the conflicting open: 3163 */ 3164 if (conf->len) { 3165 kfree(conf->data); 3166 conf->len = 0; 3167 conf->data = NULL; 3168 goto again; 3169 } 3170 return nfserr_resource; 3171 } 3172 p = xdr_encode_hyper(p, ld->ld_start); 3173 p = xdr_encode_hyper(p, ld->ld_length); 3174 *p++ = cpu_to_be32(ld->ld_type); 3175 if (conf->len) { 3176 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3177 p = xdr_encode_opaque(p, conf->data, conf->len); 3178 kfree(conf->data); 3179 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3180 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3181 *p++ = cpu_to_be32(0); /* length of owner name */ 3182 } 3183 return nfserr_denied; 3184 } 3185 3186 static __be32 3187 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3188 { 3189 struct xdr_stream *xdr = &resp->xdr; 3190 3191 if (!nfserr) 3192 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3193 else if (nfserr == nfserr_denied) 3194 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3195 3196 return nfserr; 3197 } 3198 3199 static __be32 3200 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3201 { 3202 struct xdr_stream *xdr = &resp->xdr; 3203 3204 if (nfserr == nfserr_denied) 3205 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3206 return nfserr; 3207 } 3208 3209 static __be32 3210 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3211 { 3212 struct xdr_stream *xdr = &resp->xdr; 3213 3214 if (!nfserr) 3215 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3216 3217 return nfserr; 3218 } 3219 3220 3221 static __be32 3222 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3223 { 3224 struct xdr_stream *xdr = &resp->xdr; 3225 __be32 *p; 3226 3227 if (!nfserr) { 3228 p = xdr_reserve_space(xdr, 20); 3229 if (!p) 3230 return nfserr_resource; 3231 p = encode_cinfo(p, &link->li_cinfo); 3232 } 3233 return nfserr; 3234 } 3235 3236 3237 static __be32 3238 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3239 { 3240 struct xdr_stream *xdr = &resp->xdr; 3241 __be32 *p; 3242 3243 if (nfserr) 3244 goto out; 3245 3246 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3247 if (nfserr) 3248 goto out; 3249 p = xdr_reserve_space(xdr, 24); 3250 if (!p) 3251 return nfserr_resource; 3252 p = encode_cinfo(p, &open->op_cinfo); 3253 *p++ = cpu_to_be32(open->op_rflags); 3254 3255 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3256 open->op_bmval[2]); 3257 if (nfserr) 3258 goto out; 3259 3260 p = xdr_reserve_space(xdr, 4); 3261 if (!p) 3262 return nfserr_resource; 3263 3264 *p++ = cpu_to_be32(open->op_delegate_type); 3265 switch (open->op_delegate_type) { 3266 case NFS4_OPEN_DELEGATE_NONE: 3267 break; 3268 case NFS4_OPEN_DELEGATE_READ: 3269 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3270 if (nfserr) 3271 return nfserr; 3272 p = xdr_reserve_space(xdr, 20); 3273 if (!p) 3274 return nfserr_resource; 3275 *p++ = cpu_to_be32(open->op_recall); 3276 3277 /* 3278 * TODO: ACE's in delegations 3279 */ 3280 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3281 *p++ = cpu_to_be32(0); 3282 *p++ = cpu_to_be32(0); 3283 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3284 break; 3285 case NFS4_OPEN_DELEGATE_WRITE: 3286 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3287 if (nfserr) 3288 return nfserr; 3289 p = xdr_reserve_space(xdr, 32); 3290 if (!p) 3291 return nfserr_resource; 3292 *p++ = cpu_to_be32(0); 3293 3294 /* 3295 * TODO: space_limit's in delegations 3296 */ 3297 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3298 *p++ = cpu_to_be32(~(u32)0); 3299 *p++ = cpu_to_be32(~(u32)0); 3300 3301 /* 3302 * TODO: ACE's in delegations 3303 */ 3304 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3305 *p++ = cpu_to_be32(0); 3306 *p++ = cpu_to_be32(0); 3307 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3308 break; 3309 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3310 switch (open->op_why_no_deleg) { 3311 case WND4_CONTENTION: 3312 case WND4_RESOURCE: 3313 p = xdr_reserve_space(xdr, 8); 3314 if (!p) 3315 return nfserr_resource; 3316 *p++ = cpu_to_be32(open->op_why_no_deleg); 3317 /* deleg signaling not supported yet: */ 3318 *p++ = cpu_to_be32(0); 3319 break; 3320 default: 3321 p = xdr_reserve_space(xdr, 4); 3322 if (!p) 3323 return nfserr_resource; 3324 *p++ = cpu_to_be32(open->op_why_no_deleg); 3325 } 3326 break; 3327 default: 3328 BUG(); 3329 } 3330 /* XXX save filehandle here */ 3331 out: 3332 return nfserr; 3333 } 3334 3335 static __be32 3336 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3337 { 3338 struct xdr_stream *xdr = &resp->xdr; 3339 3340 if (!nfserr) 3341 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3342 3343 return nfserr; 3344 } 3345 3346 static __be32 3347 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3348 { 3349 struct xdr_stream *xdr = &resp->xdr; 3350 3351 if (!nfserr) 3352 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3353 3354 return nfserr; 3355 } 3356 3357 static __be32 nfsd4_encode_splice_read( 3358 struct nfsd4_compoundres *resp, 3359 struct nfsd4_read *read, 3360 struct file *file, unsigned long maxcount) 3361 { 3362 struct xdr_stream *xdr = &resp->xdr; 3363 struct xdr_buf *buf = xdr->buf; 3364 u32 eof; 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 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3374 read->rd_offset, &maxcount); 3375 if (nfserr) { 3376 /* 3377 * nfsd_splice_actor may have already messed with the 3378 * page length; reset it so as not to confuse 3379 * xdr_truncate_encode: 3380 */ 3381 buf->page_len = 0; 3382 return nfserr; 3383 } 3384 3385 eof = (read->rd_offset + maxcount >= 3386 d_inode(read->rd_fhp->fh_dentry)->i_size); 3387 3388 *(p++) = htonl(eof); 3389 *(p++) = htonl(maxcount); 3390 3391 buf->page_len = maxcount; 3392 buf->len += maxcount; 3393 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3394 / PAGE_SIZE; 3395 3396 /* Use rest of head for padding and remaining ops: */ 3397 buf->tail[0].iov_base = xdr->p; 3398 buf->tail[0].iov_len = 0; 3399 xdr->iov = buf->tail; 3400 if (maxcount&3) { 3401 int pad = 4 - (maxcount&3); 3402 3403 *(xdr->p++) = 0; 3404 3405 buf->tail[0].iov_base += maxcount&3; 3406 buf->tail[0].iov_len = pad; 3407 buf->len += pad; 3408 } 3409 3410 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3411 buf->buflen - buf->len); 3412 buf->buflen = buf->len + space_left; 3413 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3414 3415 return 0; 3416 } 3417 3418 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3419 struct nfsd4_read *read, 3420 struct file *file, unsigned long maxcount) 3421 { 3422 struct xdr_stream *xdr = &resp->xdr; 3423 u32 eof; 3424 int v; 3425 int starting_len = xdr->buf->len - 8; 3426 long len; 3427 int thislen; 3428 __be32 nfserr; 3429 __be32 tmp; 3430 __be32 *p; 3431 u32 zzz = 0; 3432 int pad; 3433 3434 len = maxcount; 3435 v = 0; 3436 3437 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3438 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3439 WARN_ON_ONCE(!p); 3440 resp->rqstp->rq_vec[v].iov_base = p; 3441 resp->rqstp->rq_vec[v].iov_len = thislen; 3442 v++; 3443 len -= thislen; 3444 3445 while (len) { 3446 thislen = min_t(long, len, PAGE_SIZE); 3447 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3448 WARN_ON_ONCE(!p); 3449 resp->rqstp->rq_vec[v].iov_base = p; 3450 resp->rqstp->rq_vec[v].iov_len = thislen; 3451 v++; 3452 len -= thislen; 3453 } 3454 read->rd_vlen = v; 3455 3456 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3457 read->rd_vlen, &maxcount); 3458 if (nfserr) 3459 return nfserr; 3460 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3461 3462 eof = (read->rd_offset + maxcount >= 3463 d_inode(read->rd_fhp->fh_dentry)->i_size); 3464 3465 tmp = htonl(eof); 3466 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3467 tmp = htonl(maxcount); 3468 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3469 3470 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3471 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3472 &zzz, pad); 3473 return 0; 3474 3475 } 3476 3477 static __be32 3478 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3479 struct nfsd4_read *read) 3480 { 3481 unsigned long maxcount; 3482 struct xdr_stream *xdr = &resp->xdr; 3483 struct file *file = read->rd_filp; 3484 int starting_len = xdr->buf->len; 3485 struct raparms *ra = NULL; 3486 __be32 *p; 3487 3488 if (nfserr) 3489 goto out; 3490 3491 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3492 if (!p) { 3493 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3494 nfserr = nfserr_resource; 3495 goto out; 3496 } 3497 if (resp->xdr.buf->page_len && 3498 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3499 WARN_ON_ONCE(1); 3500 nfserr = nfserr_resource; 3501 goto out; 3502 } 3503 xdr_commit_encode(xdr); 3504 3505 maxcount = svc_max_payload(resp->rqstp); 3506 maxcount = min_t(unsigned long, maxcount, 3507 (xdr->buf->buflen - xdr->buf->len)); 3508 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3509 3510 if (read->rd_tmp_file) 3511 ra = nfsd_init_raparms(file); 3512 3513 if (file->f_op->splice_read && 3514 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3515 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3516 else 3517 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3518 3519 if (ra) 3520 nfsd_put_raparams(file, ra); 3521 3522 if (nfserr) 3523 xdr_truncate_encode(xdr, starting_len); 3524 3525 out: 3526 if (file) 3527 fput(file); 3528 return nfserr; 3529 } 3530 3531 static __be32 3532 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3533 { 3534 int maxcount; 3535 __be32 wire_count; 3536 int zero = 0; 3537 struct xdr_stream *xdr = &resp->xdr; 3538 int length_offset = xdr->buf->len; 3539 __be32 *p; 3540 3541 if (nfserr) 3542 return nfserr; 3543 3544 p = xdr_reserve_space(xdr, 4); 3545 if (!p) 3546 return nfserr_resource; 3547 maxcount = PAGE_SIZE; 3548 3549 p = xdr_reserve_space(xdr, maxcount); 3550 if (!p) 3551 return nfserr_resource; 3552 /* 3553 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3554 * if they would overflow the buffer. Is this kosher in NFSv4? If 3555 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3556 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3557 */ 3558 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3559 (char *)p, &maxcount); 3560 if (nfserr == nfserr_isdir) 3561 nfserr = nfserr_inval; 3562 if (nfserr) { 3563 xdr_truncate_encode(xdr, length_offset); 3564 return nfserr; 3565 } 3566 3567 wire_count = htonl(maxcount); 3568 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3569 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3570 if (maxcount & 3) 3571 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3572 &zero, 4 - (maxcount&3)); 3573 return 0; 3574 } 3575 3576 static __be32 3577 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3578 { 3579 int maxcount; 3580 int bytes_left; 3581 loff_t offset; 3582 __be64 wire_offset; 3583 struct xdr_stream *xdr = &resp->xdr; 3584 int starting_len = xdr->buf->len; 3585 __be32 *p; 3586 3587 if (nfserr) 3588 return nfserr; 3589 3590 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3591 if (!p) 3592 return nfserr_resource; 3593 3594 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3595 *p++ = cpu_to_be32(0); 3596 *p++ = cpu_to_be32(0); 3597 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3598 - (char *)resp->xdr.buf->head[0].iov_base; 3599 3600 /* 3601 * Number of bytes left for directory entries allowing for the 3602 * final 8 bytes of the readdir and a following failed op: 3603 */ 3604 bytes_left = xdr->buf->buflen - xdr->buf->len 3605 - COMPOUND_ERR_SLACK_SPACE - 8; 3606 if (bytes_left < 0) { 3607 nfserr = nfserr_resource; 3608 goto err_no_verf; 3609 } 3610 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3611 /* 3612 * Note the rfc defines rd_maxcount as the size of the 3613 * READDIR4resok structure, which includes the verifier above 3614 * and the 8 bytes encoded at the end of this function: 3615 */ 3616 if (maxcount < 16) { 3617 nfserr = nfserr_toosmall; 3618 goto err_no_verf; 3619 } 3620 maxcount = min_t(int, maxcount-16, bytes_left); 3621 3622 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3623 if (!readdir->rd_dircount) 3624 readdir->rd_dircount = INT_MAX; 3625 3626 readdir->xdr = xdr; 3627 readdir->rd_maxcount = maxcount; 3628 readdir->common.err = 0; 3629 readdir->cookie_offset = 0; 3630 3631 offset = readdir->rd_cookie; 3632 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3633 &offset, 3634 &readdir->common, nfsd4_encode_dirent); 3635 if (nfserr == nfs_ok && 3636 readdir->common.err == nfserr_toosmall && 3637 xdr->buf->len == starting_len + 8) { 3638 /* nothing encoded; which limit did we hit?: */ 3639 if (maxcount - 16 < bytes_left) 3640 /* It was the fault of rd_maxcount: */ 3641 nfserr = nfserr_toosmall; 3642 else 3643 /* We ran out of buffer space: */ 3644 nfserr = nfserr_resource; 3645 } 3646 if (nfserr) 3647 goto err_no_verf; 3648 3649 if (readdir->cookie_offset) { 3650 wire_offset = cpu_to_be64(offset); 3651 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3652 &wire_offset, 8); 3653 } 3654 3655 p = xdr_reserve_space(xdr, 8); 3656 if (!p) { 3657 WARN_ON_ONCE(1); 3658 goto err_no_verf; 3659 } 3660 *p++ = 0; /* no more entries */ 3661 *p++ = htonl(readdir->common.err == nfserr_eof); 3662 3663 return 0; 3664 err_no_verf: 3665 xdr_truncate_encode(xdr, starting_len); 3666 return nfserr; 3667 } 3668 3669 static __be32 3670 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3671 { 3672 struct xdr_stream *xdr = &resp->xdr; 3673 __be32 *p; 3674 3675 if (!nfserr) { 3676 p = xdr_reserve_space(xdr, 20); 3677 if (!p) 3678 return nfserr_resource; 3679 p = encode_cinfo(p, &remove->rm_cinfo); 3680 } 3681 return nfserr; 3682 } 3683 3684 static __be32 3685 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3686 { 3687 struct xdr_stream *xdr = &resp->xdr; 3688 __be32 *p; 3689 3690 if (!nfserr) { 3691 p = xdr_reserve_space(xdr, 40); 3692 if (!p) 3693 return nfserr_resource; 3694 p = encode_cinfo(p, &rename->rn_sinfo); 3695 p = encode_cinfo(p, &rename->rn_tinfo); 3696 } 3697 return nfserr; 3698 } 3699 3700 static __be32 3701 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3702 __be32 nfserr, struct svc_export *exp) 3703 { 3704 u32 i, nflavs, supported; 3705 struct exp_flavor_info *flavs; 3706 struct exp_flavor_info def_flavs[2]; 3707 __be32 *p, *flavorsp; 3708 static bool report = true; 3709 3710 if (nfserr) 3711 goto out; 3712 nfserr = nfserr_resource; 3713 if (exp->ex_nflavors) { 3714 flavs = exp->ex_flavors; 3715 nflavs = exp->ex_nflavors; 3716 } else { /* Handling of some defaults in absence of real secinfo: */ 3717 flavs = def_flavs; 3718 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3719 nflavs = 2; 3720 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3721 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3722 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3723 nflavs = 1; 3724 flavs[0].pseudoflavor 3725 = svcauth_gss_flavor(exp->ex_client); 3726 } else { 3727 nflavs = 1; 3728 flavs[0].pseudoflavor 3729 = exp->ex_client->flavour->flavour; 3730 } 3731 } 3732 3733 supported = 0; 3734 p = xdr_reserve_space(xdr, 4); 3735 if (!p) 3736 goto out; 3737 flavorsp = p++; /* to be backfilled later */ 3738 3739 for (i = 0; i < nflavs; i++) { 3740 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3741 struct rpcsec_gss_info info; 3742 3743 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3744 supported++; 3745 p = xdr_reserve_space(xdr, 4 + 4 + 3746 XDR_LEN(info.oid.len) + 4 + 4); 3747 if (!p) 3748 goto out; 3749 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3750 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3751 *p++ = cpu_to_be32(info.qop); 3752 *p++ = cpu_to_be32(info.service); 3753 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3754 supported++; 3755 p = xdr_reserve_space(xdr, 4); 3756 if (!p) 3757 goto out; 3758 *p++ = cpu_to_be32(pf); 3759 } else { 3760 if (report) 3761 pr_warn("NFS: SECINFO: security flavor %u " 3762 "is not supported\n", pf); 3763 } 3764 } 3765 3766 if (nflavs != supported) 3767 report = false; 3768 *flavorsp = htonl(supported); 3769 nfserr = 0; 3770 out: 3771 if (exp) 3772 exp_put(exp); 3773 return nfserr; 3774 } 3775 3776 static __be32 3777 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3778 struct nfsd4_secinfo *secinfo) 3779 { 3780 struct xdr_stream *xdr = &resp->xdr; 3781 3782 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3783 } 3784 3785 static __be32 3786 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3787 struct nfsd4_secinfo_no_name *secinfo) 3788 { 3789 struct xdr_stream *xdr = &resp->xdr; 3790 3791 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3792 } 3793 3794 /* 3795 * The SETATTR encode routine is special -- it always encodes a bitmap, 3796 * regardless of the error status. 3797 */ 3798 static __be32 3799 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3800 { 3801 struct xdr_stream *xdr = &resp->xdr; 3802 __be32 *p; 3803 3804 p = xdr_reserve_space(xdr, 16); 3805 if (!p) 3806 return nfserr_resource; 3807 if (nfserr) { 3808 *p++ = cpu_to_be32(3); 3809 *p++ = cpu_to_be32(0); 3810 *p++ = cpu_to_be32(0); 3811 *p++ = cpu_to_be32(0); 3812 } 3813 else { 3814 *p++ = cpu_to_be32(3); 3815 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3816 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3817 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3818 } 3819 return nfserr; 3820 } 3821 3822 static __be32 3823 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3824 { 3825 struct xdr_stream *xdr = &resp->xdr; 3826 __be32 *p; 3827 3828 if (!nfserr) { 3829 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3830 if (!p) 3831 return nfserr_resource; 3832 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3833 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3834 NFS4_VERIFIER_SIZE); 3835 } 3836 else if (nfserr == nfserr_clid_inuse) { 3837 p = xdr_reserve_space(xdr, 8); 3838 if (!p) 3839 return nfserr_resource; 3840 *p++ = cpu_to_be32(0); 3841 *p++ = cpu_to_be32(0); 3842 } 3843 return nfserr; 3844 } 3845 3846 static __be32 3847 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3848 { 3849 struct xdr_stream *xdr = &resp->xdr; 3850 __be32 *p; 3851 3852 if (!nfserr) { 3853 p = xdr_reserve_space(xdr, 16); 3854 if (!p) 3855 return nfserr_resource; 3856 *p++ = cpu_to_be32(write->wr_bytes_written); 3857 *p++ = cpu_to_be32(write->wr_how_written); 3858 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3859 NFS4_VERIFIER_SIZE); 3860 } 3861 return nfserr; 3862 } 3863 3864 static const u32 nfs4_minimal_spo_must_enforce[2] = { 3865 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 3866 1 << (OP_EXCHANGE_ID - 32) | 3867 1 << (OP_CREATE_SESSION - 32) | 3868 1 << (OP_DESTROY_SESSION - 32) | 3869 1 << (OP_DESTROY_CLIENTID - 32) 3870 }; 3871 3872 static __be32 3873 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3874 struct nfsd4_exchange_id *exid) 3875 { 3876 struct xdr_stream *xdr = &resp->xdr; 3877 __be32 *p; 3878 char *major_id; 3879 char *server_scope; 3880 int major_id_sz; 3881 int server_scope_sz; 3882 uint64_t minor_id = 0; 3883 3884 if (nfserr) 3885 return nfserr; 3886 3887 major_id = utsname()->nodename; 3888 major_id_sz = strlen(major_id); 3889 server_scope = utsname()->nodename; 3890 server_scope_sz = strlen(server_scope); 3891 3892 p = xdr_reserve_space(xdr, 3893 8 /* eir_clientid */ + 3894 4 /* eir_sequenceid */ + 3895 4 /* eir_flags */ + 3896 4 /* spr_how */); 3897 if (!p) 3898 return nfserr_resource; 3899 3900 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3901 *p++ = cpu_to_be32(exid->seqid); 3902 *p++ = cpu_to_be32(exid->flags); 3903 3904 *p++ = cpu_to_be32(exid->spa_how); 3905 3906 switch (exid->spa_how) { 3907 case SP4_NONE: 3908 break; 3909 case SP4_MACH_CRED: 3910 /* spo_must_enforce, spo_must_allow */ 3911 p = xdr_reserve_space(xdr, 16); 3912 if (!p) 3913 return nfserr_resource; 3914 3915 /* spo_must_enforce bitmap: */ 3916 *p++ = cpu_to_be32(2); 3917 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); 3918 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); 3919 /* empty spo_must_allow bitmap: */ 3920 *p++ = cpu_to_be32(0); 3921 3922 break; 3923 default: 3924 WARN_ON_ONCE(1); 3925 } 3926 3927 p = xdr_reserve_space(xdr, 3928 8 /* so_minor_id */ + 3929 4 /* so_major_id.len */ + 3930 (XDR_QUADLEN(major_id_sz) * 4) + 3931 4 /* eir_server_scope.len */ + 3932 (XDR_QUADLEN(server_scope_sz) * 4) + 3933 4 /* eir_server_impl_id.count (0) */); 3934 if (!p) 3935 return nfserr_resource; 3936 3937 /* The server_owner struct */ 3938 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3939 /* major id */ 3940 p = xdr_encode_opaque(p, major_id, major_id_sz); 3941 3942 /* Server scope */ 3943 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3944 3945 /* Implementation id */ 3946 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3947 return 0; 3948 } 3949 3950 static __be32 3951 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3952 struct nfsd4_create_session *sess) 3953 { 3954 struct xdr_stream *xdr = &resp->xdr; 3955 __be32 *p; 3956 3957 if (nfserr) 3958 return nfserr; 3959 3960 p = xdr_reserve_space(xdr, 24); 3961 if (!p) 3962 return nfserr_resource; 3963 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3964 NFS4_MAX_SESSIONID_LEN); 3965 *p++ = cpu_to_be32(sess->seqid); 3966 *p++ = cpu_to_be32(sess->flags); 3967 3968 p = xdr_reserve_space(xdr, 28); 3969 if (!p) 3970 return nfserr_resource; 3971 *p++ = cpu_to_be32(0); /* headerpadsz */ 3972 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3973 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3974 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3975 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3976 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 3977 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 3978 3979 if (sess->fore_channel.nr_rdma_attrs) { 3980 p = xdr_reserve_space(xdr, 4); 3981 if (!p) 3982 return nfserr_resource; 3983 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 3984 } 3985 3986 p = xdr_reserve_space(xdr, 28); 3987 if (!p) 3988 return nfserr_resource; 3989 *p++ = cpu_to_be32(0); /* headerpadsz */ 3990 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 3991 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 3992 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 3993 *p++ = cpu_to_be32(sess->back_channel.maxops); 3994 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 3995 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 3996 3997 if (sess->back_channel.nr_rdma_attrs) { 3998 p = xdr_reserve_space(xdr, 4); 3999 if (!p) 4000 return nfserr_resource; 4001 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4002 } 4003 return 0; 4004 } 4005 4006 static __be32 4007 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4008 struct nfsd4_sequence *seq) 4009 { 4010 struct xdr_stream *xdr = &resp->xdr; 4011 __be32 *p; 4012 4013 if (nfserr) 4014 return nfserr; 4015 4016 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4017 if (!p) 4018 return nfserr_resource; 4019 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4020 NFS4_MAX_SESSIONID_LEN); 4021 *p++ = cpu_to_be32(seq->seqid); 4022 *p++ = cpu_to_be32(seq->slotid); 4023 /* Note slotid's are numbered from zero: */ 4024 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4025 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4026 *p++ = cpu_to_be32(seq->status_flags); 4027 4028 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4029 return 0; 4030 } 4031 4032 static __be32 4033 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4034 struct nfsd4_test_stateid *test_stateid) 4035 { 4036 struct xdr_stream *xdr = &resp->xdr; 4037 struct nfsd4_test_stateid_id *stateid, *next; 4038 __be32 *p; 4039 4040 if (nfserr) 4041 return nfserr; 4042 4043 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4044 if (!p) 4045 return nfserr_resource; 4046 *p++ = htonl(test_stateid->ts_num_ids); 4047 4048 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4049 *p++ = stateid->ts_id_status; 4050 } 4051 4052 return nfserr; 4053 } 4054 4055 #ifdef CONFIG_NFSD_PNFS 4056 static __be32 4057 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4058 struct nfsd4_getdeviceinfo *gdev) 4059 { 4060 struct xdr_stream *xdr = &resp->xdr; 4061 const struct nfsd4_layout_ops *ops = 4062 nfsd4_layout_ops[gdev->gd_layout_type]; 4063 u32 starting_len = xdr->buf->len, needed_len; 4064 __be32 *p; 4065 4066 dprintk("%s: err %d\n", __func__, nfserr); 4067 if (nfserr) 4068 goto out; 4069 4070 nfserr = nfserr_resource; 4071 p = xdr_reserve_space(xdr, 4); 4072 if (!p) 4073 goto out; 4074 4075 *p++ = cpu_to_be32(gdev->gd_layout_type); 4076 4077 /* If maxcount is 0 then just update notifications */ 4078 if (gdev->gd_maxcount != 0) { 4079 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4080 if (nfserr) { 4081 /* 4082 * We don't bother to burden the layout drivers with 4083 * enforcing gd_maxcount, just tell the client to 4084 * come back with a bigger buffer if it's not enough. 4085 */ 4086 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4087 goto toosmall; 4088 goto out; 4089 } 4090 } 4091 4092 nfserr = nfserr_resource; 4093 if (gdev->gd_notify_types) { 4094 p = xdr_reserve_space(xdr, 4 + 4); 4095 if (!p) 4096 goto out; 4097 *p++ = cpu_to_be32(1); /* bitmap length */ 4098 *p++ = cpu_to_be32(gdev->gd_notify_types); 4099 } else { 4100 p = xdr_reserve_space(xdr, 4); 4101 if (!p) 4102 goto out; 4103 *p++ = 0; 4104 } 4105 4106 nfserr = 0; 4107 out: 4108 kfree(gdev->gd_device); 4109 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4110 return nfserr; 4111 4112 toosmall: 4113 dprintk("%s: maxcount too small\n", __func__); 4114 needed_len = xdr->buf->len + 4 /* notifications */; 4115 xdr_truncate_encode(xdr, starting_len); 4116 p = xdr_reserve_space(xdr, 4); 4117 if (!p) { 4118 nfserr = nfserr_resource; 4119 } else { 4120 *p++ = cpu_to_be32(needed_len); 4121 nfserr = nfserr_toosmall; 4122 } 4123 goto out; 4124 } 4125 4126 static __be32 4127 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4128 struct nfsd4_layoutget *lgp) 4129 { 4130 struct xdr_stream *xdr = &resp->xdr; 4131 const struct nfsd4_layout_ops *ops = 4132 nfsd4_layout_ops[lgp->lg_layout_type]; 4133 __be32 *p; 4134 4135 dprintk("%s: err %d\n", __func__, nfserr); 4136 if (nfserr) 4137 goto out; 4138 4139 nfserr = nfserr_resource; 4140 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4141 if (!p) 4142 goto out; 4143 4144 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4145 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4146 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4147 sizeof(stateid_opaque_t)); 4148 4149 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4150 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4151 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4152 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4153 *p++ = cpu_to_be32(lgp->lg_layout_type); 4154 4155 nfserr = ops->encode_layoutget(xdr, lgp); 4156 out: 4157 kfree(lgp->lg_content); 4158 return nfserr; 4159 } 4160 4161 static __be32 4162 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4163 struct nfsd4_layoutcommit *lcp) 4164 { 4165 struct xdr_stream *xdr = &resp->xdr; 4166 __be32 *p; 4167 4168 if (nfserr) 4169 return nfserr; 4170 4171 p = xdr_reserve_space(xdr, 4); 4172 if (!p) 4173 return nfserr_resource; 4174 *p++ = cpu_to_be32(lcp->lc_size_chg); 4175 if (lcp->lc_size_chg) { 4176 p = xdr_reserve_space(xdr, 8); 4177 if (!p) 4178 return nfserr_resource; 4179 p = xdr_encode_hyper(p, lcp->lc_newsize); 4180 } 4181 4182 return nfs_ok; 4183 } 4184 4185 static __be32 4186 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4187 struct nfsd4_layoutreturn *lrp) 4188 { 4189 struct xdr_stream *xdr = &resp->xdr; 4190 __be32 *p; 4191 4192 if (nfserr) 4193 return nfserr; 4194 4195 p = xdr_reserve_space(xdr, 4); 4196 if (!p) 4197 return nfserr_resource; 4198 *p++ = cpu_to_be32(lrp->lrs_present); 4199 if (lrp->lrs_present) 4200 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4201 return nfs_ok; 4202 } 4203 #endif /* CONFIG_NFSD_PNFS */ 4204 4205 static __be32 4206 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4207 struct nfsd4_seek *seek) 4208 { 4209 __be32 *p; 4210 4211 if (nfserr) 4212 return nfserr; 4213 4214 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4215 *p++ = cpu_to_be32(seek->seek_eof); 4216 p = xdr_encode_hyper(p, seek->seek_pos); 4217 4218 return nfserr; 4219 } 4220 4221 static __be32 4222 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4223 { 4224 return nfserr; 4225 } 4226 4227 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4228 4229 /* 4230 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4231 * since we don't need to filter out obsolete ops as this is 4232 * done in the decoding phase. 4233 */ 4234 static nfsd4_enc nfsd4_enc_ops[] = { 4235 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4236 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4237 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4238 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4239 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4240 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4241 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4242 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4243 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4244 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4245 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4246 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4247 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4248 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4249 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4250 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4251 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4252 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4253 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4254 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4255 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4256 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4257 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4258 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4259 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4260 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4261 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4262 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4263 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4264 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4265 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4266 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4267 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4268 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4269 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4270 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4271 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4272 4273 /* NFSv4.1 operations */ 4274 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4275 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4276 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4277 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4278 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4279 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4280 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4281 #ifdef CONFIG_NFSD_PNFS 4282 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4283 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4284 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4285 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4286 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4287 #else 4288 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4289 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4290 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4291 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4292 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4293 #endif 4294 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4295 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4296 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4297 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4298 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4299 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4300 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4301 4302 /* NFSv4.2 operations */ 4303 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4304 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, 4305 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4306 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4307 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4308 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4309 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4310 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4311 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4312 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4313 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4314 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4315 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4316 }; 4317 4318 /* 4319 * Calculate whether we still have space to encode repsize bytes. 4320 * There are two considerations: 4321 * - For NFS versions >=4.1, the size of the reply must stay within 4322 * session limits 4323 * - For all NFS versions, we must stay within limited preallocated 4324 * buffer space. 4325 * 4326 * This is called before the operation is processed, so can only provide 4327 * an upper estimate. For some nonidempotent operations (such as 4328 * getattr), it's not necessarily a problem if that estimate is wrong, 4329 * as we can fail it after processing without significant side effects. 4330 */ 4331 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4332 { 4333 struct xdr_buf *buf = &resp->rqstp->rq_res; 4334 struct nfsd4_slot *slot = resp->cstate.slot; 4335 4336 if (buf->len + respsize <= buf->buflen) 4337 return nfs_ok; 4338 if (!nfsd4_has_session(&resp->cstate)) 4339 return nfserr_resource; 4340 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4341 WARN_ON_ONCE(1); 4342 return nfserr_rep_too_big_to_cache; 4343 } 4344 return nfserr_rep_too_big; 4345 } 4346 4347 void 4348 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4349 { 4350 struct xdr_stream *xdr = &resp->xdr; 4351 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4352 struct svc_rqst *rqstp = resp->rqstp; 4353 int post_err_offset; 4354 nfsd4_enc encoder; 4355 __be32 *p; 4356 4357 p = xdr_reserve_space(xdr, 8); 4358 if (!p) { 4359 WARN_ON_ONCE(1); 4360 return; 4361 } 4362 *p++ = cpu_to_be32(op->opnum); 4363 post_err_offset = xdr->buf->len; 4364 4365 if (op->opnum == OP_ILLEGAL) 4366 goto status; 4367 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4368 !nfsd4_enc_ops[op->opnum]); 4369 encoder = nfsd4_enc_ops[op->opnum]; 4370 op->status = encoder(resp, op->status, &op->u); 4371 xdr_commit_encode(xdr); 4372 4373 /* nfsd4_check_resp_size guarantees enough room for error status */ 4374 if (!op->status) { 4375 int space_needed = 0; 4376 if (!nfsd4_last_compound_op(rqstp)) 4377 space_needed = COMPOUND_ERR_SLACK_SPACE; 4378 op->status = nfsd4_check_resp_size(resp, space_needed); 4379 } 4380 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4381 struct nfsd4_slot *slot = resp->cstate.slot; 4382 4383 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4384 op->status = nfserr_rep_too_big_to_cache; 4385 else 4386 op->status = nfserr_rep_too_big; 4387 } 4388 if (op->status == nfserr_resource || 4389 op->status == nfserr_rep_too_big || 4390 op->status == nfserr_rep_too_big_to_cache) { 4391 /* 4392 * The operation may have already been encoded or 4393 * partially encoded. No op returns anything additional 4394 * in the case of one of these three errors, so we can 4395 * just truncate back to after the status. But it's a 4396 * bug if we had to do this on a non-idempotent op: 4397 */ 4398 warn_on_nonidempotent_op(op); 4399 xdr_truncate_encode(xdr, post_err_offset); 4400 } 4401 if (so) { 4402 int len = xdr->buf->len - post_err_offset; 4403 4404 so->so_replay.rp_status = op->status; 4405 so->so_replay.rp_buflen = len; 4406 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4407 so->so_replay.rp_buf, len); 4408 } 4409 status: 4410 /* Note that op->status is already in network byte order: */ 4411 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4412 } 4413 4414 /* 4415 * Encode the reply stored in the stateowner reply cache 4416 * 4417 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4418 * previously sent already encoded operation. 4419 */ 4420 void 4421 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4422 { 4423 __be32 *p; 4424 struct nfs4_replay *rp = op->replay; 4425 4426 BUG_ON(!rp); 4427 4428 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4429 if (!p) { 4430 WARN_ON_ONCE(1); 4431 return; 4432 } 4433 *p++ = cpu_to_be32(op->opnum); 4434 *p++ = rp->rp_status; /* already xdr'ed */ 4435 4436 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4437 } 4438 4439 int 4440 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4441 { 4442 return xdr_ressize_check(rqstp, p); 4443 } 4444 4445 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4446 { 4447 struct svc_rqst *rqstp = rq; 4448 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4449 4450 if (args->ops != args->iops) { 4451 kfree(args->ops); 4452 args->ops = args->iops; 4453 } 4454 kfree(args->tmpp); 4455 args->tmpp = NULL; 4456 while (args->to_free) { 4457 struct svcxdr_tmpbuf *tb = args->to_free; 4458 args->to_free = tb->next; 4459 kfree(tb); 4460 } 4461 return 1; 4462 } 4463 4464 int 4465 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4466 { 4467 if (rqstp->rq_arg.head[0].iov_len % 4) { 4468 /* client is nuts */ 4469 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4470 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4471 return 0; 4472 } 4473 args->p = p; 4474 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4475 args->pagelist = rqstp->rq_arg.pages; 4476 args->pagelen = rqstp->rq_arg.page_len; 4477 args->tmpp = NULL; 4478 args->to_free = NULL; 4479 args->ops = args->iops; 4480 args->rqstp = rqstp; 4481 4482 return !nfsd4_decode_compound(args); 4483 } 4484 4485 int 4486 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4487 { 4488 /* 4489 * All that remains is to write the tag and operation count... 4490 */ 4491 struct xdr_buf *buf = resp->xdr.buf; 4492 4493 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4494 buf->tail[0].iov_len); 4495 4496 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4497 4498 p = resp->tagp; 4499 *p++ = htonl(resp->taglen); 4500 memcpy(p, resp->tag, resp->taglen); 4501 p += XDR_QUADLEN(resp->taglen); 4502 *p++ = htonl(resp->opcnt); 4503 4504 nfsd4_sequence_done(resp); 4505 return 1; 4506 } 4507 4508 /* 4509 * Local variables: 4510 * c-basic-offset: 8 4511 * End: 4512 */ 4513