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_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1679 { 1680 DECODE_HEAD; 1681 1682 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1683 if (status) 1684 return status; 1685 1686 READ_BUF(8 + 4); 1687 p = xdr_decode_hyper(p, &seek->seek_offset); 1688 seek->seek_whence = be32_to_cpup(p); 1689 1690 DECODE_TAIL; 1691 } 1692 1693 static __be32 1694 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1695 { 1696 return nfs_ok; 1697 } 1698 1699 static __be32 1700 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1701 { 1702 return nfserr_notsupp; 1703 } 1704 1705 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1706 1707 static nfsd4_dec nfsd4_dec_ops[] = { 1708 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1709 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1710 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1711 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1712 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1713 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1714 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1715 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1716 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1717 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1718 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1719 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1720 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1721 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1722 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1723 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1724 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1725 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1726 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1727 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1728 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1729 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1730 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1731 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1732 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1733 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1734 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1735 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1736 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1737 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1738 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1739 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1740 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1741 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1742 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1743 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1744 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1745 1746 /* new operations for NFSv4.1 */ 1747 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1748 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1749 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1750 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1751 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1752 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1753 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1754 #ifdef CONFIG_NFSD_PNFS 1755 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1756 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1757 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1758 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1759 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1760 #else 1761 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1762 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1763 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1764 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1765 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1766 #endif 1767 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1768 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1769 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1770 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1771 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1772 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1773 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1774 1775 /* new operations for NFSv4.2 */ 1776 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1777 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp, 1778 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1779 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1780 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1781 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1782 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1783 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1784 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1785 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1786 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1787 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1788 }; 1789 1790 static inline bool 1791 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1792 { 1793 if (op->opnum < FIRST_NFS4_OP) 1794 return false; 1795 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1796 return false; 1797 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1798 return false; 1799 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1800 return false; 1801 return true; 1802 } 1803 1804 static __be32 1805 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1806 { 1807 DECODE_HEAD; 1808 struct nfsd4_op *op; 1809 bool cachethis = false; 1810 int auth_slack= argp->rqstp->rq_auth_slack; 1811 int max_reply = auth_slack + 8; /* opcnt, status */ 1812 int readcount = 0; 1813 int readbytes = 0; 1814 int i; 1815 1816 READ_BUF(4); 1817 argp->taglen = be32_to_cpup(p++); 1818 READ_BUF(argp->taglen + 8); 1819 SAVEMEM(argp->tag, argp->taglen); 1820 argp->minorversion = be32_to_cpup(p++); 1821 argp->opcnt = be32_to_cpup(p++); 1822 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1823 1824 if (argp->taglen > NFSD4_MAX_TAGLEN) 1825 goto xdr_error; 1826 if (argp->opcnt > 100) 1827 goto xdr_error; 1828 1829 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1830 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1831 if (!argp->ops) { 1832 argp->ops = argp->iops; 1833 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1834 goto xdr_error; 1835 } 1836 } 1837 1838 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1839 argp->opcnt = 0; 1840 1841 for (i = 0; i < argp->opcnt; i++) { 1842 op = &argp->ops[i]; 1843 op->replay = NULL; 1844 1845 READ_BUF(4); 1846 op->opnum = be32_to_cpup(p++); 1847 1848 if (nfsd4_opnum_in_range(argp, op)) 1849 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1850 else { 1851 op->opnum = OP_ILLEGAL; 1852 op->status = nfserr_op_illegal; 1853 } 1854 /* 1855 * We'll try to cache the result in the DRC if any one 1856 * op in the compound wants to be cached: 1857 */ 1858 cachethis |= nfsd4_cache_this_op(op); 1859 1860 if (op->opnum == OP_READ) { 1861 readcount++; 1862 readbytes += nfsd4_max_reply(argp->rqstp, op); 1863 } else 1864 max_reply += nfsd4_max_reply(argp->rqstp, op); 1865 /* 1866 * OP_LOCK may return a conflicting lock. (Special case 1867 * because it will just skip encoding this if it runs 1868 * out of xdr buffer space, and it is the only operation 1869 * that behaves this way.) 1870 */ 1871 if (op->opnum == OP_LOCK) 1872 max_reply += NFS4_OPAQUE_LIMIT; 1873 1874 if (op->status) { 1875 argp->opcnt = i+1; 1876 break; 1877 } 1878 } 1879 /* Sessions make the DRC unnecessary: */ 1880 if (argp->minorversion) 1881 cachethis = false; 1882 svc_reserve(argp->rqstp, max_reply + readbytes); 1883 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1884 1885 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1886 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1887 1888 DECODE_TAIL; 1889 } 1890 1891 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1892 { 1893 if (IS_I_VERSION(inode)) { 1894 p = xdr_encode_hyper(p, inode->i_version); 1895 } else { 1896 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1897 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1898 } 1899 return p; 1900 } 1901 1902 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1903 { 1904 *p++ = cpu_to_be32(c->atomic); 1905 if (c->change_supported) { 1906 p = xdr_encode_hyper(p, c->before_change); 1907 p = xdr_encode_hyper(p, c->after_change); 1908 } else { 1909 *p++ = cpu_to_be32(c->before_ctime_sec); 1910 *p++ = cpu_to_be32(c->before_ctime_nsec); 1911 *p++ = cpu_to_be32(c->after_ctime_sec); 1912 *p++ = cpu_to_be32(c->after_ctime_nsec); 1913 } 1914 return p; 1915 } 1916 1917 /* Encode as an array of strings the string given with components 1918 * separated @sep, escaped with esc_enter and esc_exit. 1919 */ 1920 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1921 char *components, char esc_enter, 1922 char esc_exit) 1923 { 1924 __be32 *p; 1925 __be32 pathlen; 1926 int pathlen_offset; 1927 int strlen, count=0; 1928 char *str, *end, *next; 1929 1930 dprintk("nfsd4_encode_components(%s)\n", components); 1931 1932 pathlen_offset = xdr->buf->len; 1933 p = xdr_reserve_space(xdr, 4); 1934 if (!p) 1935 return nfserr_resource; 1936 p++; /* We will fill this in with @count later */ 1937 1938 end = str = components; 1939 while (*end) { 1940 bool found_esc = false; 1941 1942 /* try to parse as esc_start, ..., esc_end, sep */ 1943 if (*str == esc_enter) { 1944 for (; *end && (*end != esc_exit); end++) 1945 /* find esc_exit or end of string */; 1946 next = end + 1; 1947 if (*end && (!*next || *next == sep)) { 1948 str++; 1949 found_esc = true; 1950 } 1951 } 1952 1953 if (!found_esc) 1954 for (; *end && (*end != sep); end++) 1955 /* find sep or end of string */; 1956 1957 strlen = end - str; 1958 if (strlen) { 1959 p = xdr_reserve_space(xdr, strlen + 4); 1960 if (!p) 1961 return nfserr_resource; 1962 p = xdr_encode_opaque(p, str, strlen); 1963 count++; 1964 } 1965 else 1966 end++; 1967 if (found_esc) 1968 end = next; 1969 1970 str = end; 1971 } 1972 pathlen = htonl(count); 1973 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 1974 return 0; 1975 } 1976 1977 /* Encode as an array of strings the string given with components 1978 * separated @sep. 1979 */ 1980 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 1981 char *components) 1982 { 1983 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 1984 } 1985 1986 /* 1987 * encode a location element of a fs_locations structure 1988 */ 1989 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 1990 struct nfsd4_fs_location *location) 1991 { 1992 __be32 status; 1993 1994 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 1995 '[', ']'); 1996 if (status) 1997 return status; 1998 status = nfsd4_encode_components(xdr, '/', location->path); 1999 if (status) 2000 return status; 2001 return 0; 2002 } 2003 2004 /* 2005 * Encode a path in RFC3530 'pathname4' format 2006 */ 2007 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2008 const struct path *root, 2009 const struct path *path) 2010 { 2011 struct path cur = *path; 2012 __be32 *p; 2013 struct dentry **components = NULL; 2014 unsigned int ncomponents = 0; 2015 __be32 err = nfserr_jukebox; 2016 2017 dprintk("nfsd4_encode_components("); 2018 2019 path_get(&cur); 2020 /* First walk the path up to the nfsd root, and store the 2021 * dentries/path components in an array. 2022 */ 2023 for (;;) { 2024 if (path_equal(&cur, root)) 2025 break; 2026 if (cur.dentry == cur.mnt->mnt_root) { 2027 if (follow_up(&cur)) 2028 continue; 2029 goto out_free; 2030 } 2031 if ((ncomponents & 15) == 0) { 2032 struct dentry **new; 2033 new = krealloc(components, 2034 sizeof(*new) * (ncomponents + 16), 2035 GFP_KERNEL); 2036 if (!new) 2037 goto out_free; 2038 components = new; 2039 } 2040 components[ncomponents++] = cur.dentry; 2041 cur.dentry = dget_parent(cur.dentry); 2042 } 2043 err = nfserr_resource; 2044 p = xdr_reserve_space(xdr, 4); 2045 if (!p) 2046 goto out_free; 2047 *p++ = cpu_to_be32(ncomponents); 2048 2049 while (ncomponents) { 2050 struct dentry *dentry = components[ncomponents - 1]; 2051 unsigned int len; 2052 2053 spin_lock(&dentry->d_lock); 2054 len = dentry->d_name.len; 2055 p = xdr_reserve_space(xdr, len + 4); 2056 if (!p) { 2057 spin_unlock(&dentry->d_lock); 2058 goto out_free; 2059 } 2060 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2061 dprintk("/%pd", dentry); 2062 spin_unlock(&dentry->d_lock); 2063 dput(dentry); 2064 ncomponents--; 2065 } 2066 2067 err = 0; 2068 out_free: 2069 dprintk(")\n"); 2070 while (ncomponents) 2071 dput(components[--ncomponents]); 2072 kfree(components); 2073 path_put(&cur); 2074 return err; 2075 } 2076 2077 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2078 struct svc_rqst *rqstp, const struct path *path) 2079 { 2080 struct svc_export *exp_ps; 2081 __be32 res; 2082 2083 exp_ps = rqst_find_fsidzero_export(rqstp); 2084 if (IS_ERR(exp_ps)) 2085 return nfserrno(PTR_ERR(exp_ps)); 2086 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2087 exp_put(exp_ps); 2088 return res; 2089 } 2090 2091 /* 2092 * encode a fs_locations structure 2093 */ 2094 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2095 struct svc_rqst *rqstp, struct svc_export *exp) 2096 { 2097 __be32 status; 2098 int i; 2099 __be32 *p; 2100 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2101 2102 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2103 if (status) 2104 return status; 2105 p = xdr_reserve_space(xdr, 4); 2106 if (!p) 2107 return nfserr_resource; 2108 *p++ = cpu_to_be32(fslocs->locations_count); 2109 for (i=0; i<fslocs->locations_count; i++) { 2110 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2111 if (status) 2112 return status; 2113 } 2114 return 0; 2115 } 2116 2117 static u32 nfs4_file_type(umode_t mode) 2118 { 2119 switch (mode & S_IFMT) { 2120 case S_IFIFO: return NF4FIFO; 2121 case S_IFCHR: return NF4CHR; 2122 case S_IFDIR: return NF4DIR; 2123 case S_IFBLK: return NF4BLK; 2124 case S_IFLNK: return NF4LNK; 2125 case S_IFREG: return NF4REG; 2126 case S_IFSOCK: return NF4SOCK; 2127 default: return NF4BAD; 2128 }; 2129 } 2130 2131 static inline __be32 2132 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2133 struct nfs4_ace *ace) 2134 { 2135 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2136 return nfs4_acl_write_who(xdr, ace->whotype); 2137 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2138 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2139 else 2140 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2141 } 2142 2143 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2144 FATTR4_WORD0_RDATTR_ERROR) 2145 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2146 2147 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2148 static inline __be32 2149 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2150 void *context, int len) 2151 { 2152 __be32 *p; 2153 2154 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2155 if (!p) 2156 return nfserr_resource; 2157 2158 /* 2159 * For now we use a 0 here to indicate the null translation; in 2160 * the future we may place a call to translation code here. 2161 */ 2162 *p++ = cpu_to_be32(0); /* lfs */ 2163 *p++ = cpu_to_be32(0); /* pi */ 2164 p = xdr_encode_opaque(p, context, len); 2165 return 0; 2166 } 2167 #else 2168 static inline __be32 2169 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2170 void *context, int len) 2171 { return 0; } 2172 #endif 2173 2174 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 2175 { 2176 /* As per referral draft: */ 2177 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2178 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2179 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2180 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2181 *rdattr_err = NFSERR_MOVED; 2182 else 2183 return nfserr_moved; 2184 } 2185 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2186 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2187 return 0; 2188 } 2189 2190 2191 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2192 { 2193 struct path path = exp->ex_path; 2194 int err; 2195 2196 path_get(&path); 2197 while (follow_up(&path)) { 2198 if (path.dentry != path.mnt->mnt_root) 2199 break; 2200 } 2201 err = vfs_getattr(&path, stat); 2202 path_put(&path); 2203 return err; 2204 } 2205 2206 /* 2207 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2208 * ourselves. 2209 */ 2210 static __be32 2211 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2212 struct svc_export *exp, 2213 struct dentry *dentry, u32 *bmval, 2214 struct svc_rqst *rqstp, int ignore_crossmnt) 2215 { 2216 u32 bmval0 = bmval[0]; 2217 u32 bmval1 = bmval[1]; 2218 u32 bmval2 = bmval[2]; 2219 struct kstat stat; 2220 struct svc_fh *tempfh = NULL; 2221 struct kstatfs statfs; 2222 __be32 *p; 2223 int starting_len = xdr->buf->len; 2224 int attrlen_offset; 2225 __be32 attrlen; 2226 u32 dummy; 2227 u64 dummy64; 2228 u32 rdattr_err = 0; 2229 __be32 status; 2230 int err; 2231 struct nfs4_acl *acl = NULL; 2232 void *context = NULL; 2233 int contextlen; 2234 bool contextsupport = false; 2235 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2236 u32 minorversion = resp->cstate.minorversion; 2237 struct path path = { 2238 .mnt = exp->ex_path.mnt, 2239 .dentry = dentry, 2240 }; 2241 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2242 2243 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2244 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2245 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2246 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2247 2248 if (exp->ex_fslocs.migrated) { 2249 BUG_ON(bmval[2]); 2250 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 2251 if (status) 2252 goto out; 2253 } 2254 2255 err = vfs_getattr(&path, &stat); 2256 if (err) 2257 goto out_nfserr; 2258 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2259 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2260 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2261 FATTR4_WORD1_SPACE_TOTAL))) { 2262 err = vfs_statfs(&path, &statfs); 2263 if (err) 2264 goto out_nfserr; 2265 } 2266 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2267 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2268 status = nfserr_jukebox; 2269 if (!tempfh) 2270 goto out; 2271 fh_init(tempfh, NFS4_FHSIZE); 2272 status = fh_compose(tempfh, exp, dentry, NULL); 2273 if (status) 2274 goto out; 2275 fhp = tempfh; 2276 } 2277 if (bmval0 & FATTR4_WORD0_ACL) { 2278 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2279 if (err == -EOPNOTSUPP) 2280 bmval0 &= ~FATTR4_WORD0_ACL; 2281 else if (err == -EINVAL) { 2282 status = nfserr_attrnotsupp; 2283 goto out; 2284 } else if (err != 0) 2285 goto out_nfserr; 2286 } 2287 2288 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2289 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) || 2290 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) { 2291 err = security_inode_getsecctx(d_inode(dentry), 2292 &context, &contextlen); 2293 contextsupport = (err == 0); 2294 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2295 if (err == -EOPNOTSUPP) 2296 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2297 else if (err) 2298 goto out_nfserr; 2299 } 2300 } 2301 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2302 2303 if (bmval2) { 2304 p = xdr_reserve_space(xdr, 16); 2305 if (!p) 2306 goto out_resource; 2307 *p++ = cpu_to_be32(3); 2308 *p++ = cpu_to_be32(bmval0); 2309 *p++ = cpu_to_be32(bmval1); 2310 *p++ = cpu_to_be32(bmval2); 2311 } else if (bmval1) { 2312 p = xdr_reserve_space(xdr, 12); 2313 if (!p) 2314 goto out_resource; 2315 *p++ = cpu_to_be32(2); 2316 *p++ = cpu_to_be32(bmval0); 2317 *p++ = cpu_to_be32(bmval1); 2318 } else { 2319 p = xdr_reserve_space(xdr, 8); 2320 if (!p) 2321 goto out_resource; 2322 *p++ = cpu_to_be32(1); 2323 *p++ = cpu_to_be32(bmval0); 2324 } 2325 2326 attrlen_offset = xdr->buf->len; 2327 p = xdr_reserve_space(xdr, 4); 2328 if (!p) 2329 goto out_resource; 2330 p++; /* to be backfilled later */ 2331 2332 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2333 u32 word0 = nfsd_suppattrs0(minorversion); 2334 u32 word1 = nfsd_suppattrs1(minorversion); 2335 u32 word2 = nfsd_suppattrs2(minorversion); 2336 2337 if (!IS_POSIXACL(dentry->d_inode)) 2338 word0 &= ~FATTR4_WORD0_ACL; 2339 if (!contextsupport) 2340 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2341 if (!word2) { 2342 p = xdr_reserve_space(xdr, 12); 2343 if (!p) 2344 goto out_resource; 2345 *p++ = cpu_to_be32(2); 2346 *p++ = cpu_to_be32(word0); 2347 *p++ = cpu_to_be32(word1); 2348 } else { 2349 p = xdr_reserve_space(xdr, 16); 2350 if (!p) 2351 goto out_resource; 2352 *p++ = cpu_to_be32(3); 2353 *p++ = cpu_to_be32(word0); 2354 *p++ = cpu_to_be32(word1); 2355 *p++ = cpu_to_be32(word2); 2356 } 2357 } 2358 if (bmval0 & FATTR4_WORD0_TYPE) { 2359 p = xdr_reserve_space(xdr, 4); 2360 if (!p) 2361 goto out_resource; 2362 dummy = nfs4_file_type(stat.mode); 2363 if (dummy == NF4BAD) { 2364 status = nfserr_serverfault; 2365 goto out; 2366 } 2367 *p++ = cpu_to_be32(dummy); 2368 } 2369 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2370 p = xdr_reserve_space(xdr, 4); 2371 if (!p) 2372 goto out_resource; 2373 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2374 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2375 else 2376 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2377 NFS4_FH_VOL_RENAME); 2378 } 2379 if (bmval0 & FATTR4_WORD0_CHANGE) { 2380 p = xdr_reserve_space(xdr, 8); 2381 if (!p) 2382 goto out_resource; 2383 p = encode_change(p, &stat, d_inode(dentry)); 2384 } 2385 if (bmval0 & FATTR4_WORD0_SIZE) { 2386 p = xdr_reserve_space(xdr, 8); 2387 if (!p) 2388 goto out_resource; 2389 p = xdr_encode_hyper(p, stat.size); 2390 } 2391 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2392 p = xdr_reserve_space(xdr, 4); 2393 if (!p) 2394 goto out_resource; 2395 *p++ = cpu_to_be32(1); 2396 } 2397 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2398 p = xdr_reserve_space(xdr, 4); 2399 if (!p) 2400 goto out_resource; 2401 *p++ = cpu_to_be32(1); 2402 } 2403 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2404 p = xdr_reserve_space(xdr, 4); 2405 if (!p) 2406 goto out_resource; 2407 *p++ = cpu_to_be32(0); 2408 } 2409 if (bmval0 & FATTR4_WORD0_FSID) { 2410 p = xdr_reserve_space(xdr, 16); 2411 if (!p) 2412 goto out_resource; 2413 if (exp->ex_fslocs.migrated) { 2414 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2415 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2416 } else switch(fsid_source(fhp)) { 2417 case FSIDSOURCE_FSID: 2418 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2419 p = xdr_encode_hyper(p, (u64)0); 2420 break; 2421 case FSIDSOURCE_DEV: 2422 *p++ = cpu_to_be32(0); 2423 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2424 *p++ = cpu_to_be32(0); 2425 *p++ = cpu_to_be32(MINOR(stat.dev)); 2426 break; 2427 case FSIDSOURCE_UUID: 2428 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2429 EX_UUID_LEN); 2430 break; 2431 } 2432 } 2433 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2434 p = xdr_reserve_space(xdr, 4); 2435 if (!p) 2436 goto out_resource; 2437 *p++ = cpu_to_be32(0); 2438 } 2439 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2440 p = xdr_reserve_space(xdr, 4); 2441 if (!p) 2442 goto out_resource; 2443 *p++ = cpu_to_be32(nn->nfsd4_lease); 2444 } 2445 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2446 p = xdr_reserve_space(xdr, 4); 2447 if (!p) 2448 goto out_resource; 2449 *p++ = cpu_to_be32(rdattr_err); 2450 } 2451 if (bmval0 & FATTR4_WORD0_ACL) { 2452 struct nfs4_ace *ace; 2453 2454 if (acl == NULL) { 2455 p = xdr_reserve_space(xdr, 4); 2456 if (!p) 2457 goto out_resource; 2458 2459 *p++ = cpu_to_be32(0); 2460 goto out_acl; 2461 } 2462 p = xdr_reserve_space(xdr, 4); 2463 if (!p) 2464 goto out_resource; 2465 *p++ = cpu_to_be32(acl->naces); 2466 2467 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2468 p = xdr_reserve_space(xdr, 4*3); 2469 if (!p) 2470 goto out_resource; 2471 *p++ = cpu_to_be32(ace->type); 2472 *p++ = cpu_to_be32(ace->flag); 2473 *p++ = cpu_to_be32(ace->access_mask & 2474 NFS4_ACE_MASK_ALL); 2475 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2476 if (status) 2477 goto out; 2478 } 2479 } 2480 out_acl: 2481 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2482 p = xdr_reserve_space(xdr, 4); 2483 if (!p) 2484 goto out_resource; 2485 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2486 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2487 } 2488 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2489 p = xdr_reserve_space(xdr, 4); 2490 if (!p) 2491 goto out_resource; 2492 *p++ = cpu_to_be32(1); 2493 } 2494 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2495 p = xdr_reserve_space(xdr, 4); 2496 if (!p) 2497 goto out_resource; 2498 *p++ = cpu_to_be32(0); 2499 } 2500 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2501 p = xdr_reserve_space(xdr, 4); 2502 if (!p) 2503 goto out_resource; 2504 *p++ = cpu_to_be32(1); 2505 } 2506 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2507 p = xdr_reserve_space(xdr, 4); 2508 if (!p) 2509 goto out_resource; 2510 *p++ = cpu_to_be32(1); 2511 } 2512 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2513 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2514 if (!p) 2515 goto out_resource; 2516 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2517 fhp->fh_handle.fh_size); 2518 } 2519 if (bmval0 & FATTR4_WORD0_FILEID) { 2520 p = xdr_reserve_space(xdr, 8); 2521 if (!p) 2522 goto out_resource; 2523 p = xdr_encode_hyper(p, stat.ino); 2524 } 2525 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2526 p = xdr_reserve_space(xdr, 8); 2527 if (!p) 2528 goto out_resource; 2529 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2530 } 2531 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2532 p = xdr_reserve_space(xdr, 8); 2533 if (!p) 2534 goto out_resource; 2535 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2536 } 2537 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2538 p = xdr_reserve_space(xdr, 8); 2539 if (!p) 2540 goto out_resource; 2541 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2542 } 2543 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2544 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2545 if (status) 2546 goto out; 2547 } 2548 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2549 p = xdr_reserve_space(xdr, 4); 2550 if (!p) 2551 goto out_resource; 2552 *p++ = cpu_to_be32(1); 2553 } 2554 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2555 p = xdr_reserve_space(xdr, 8); 2556 if (!p) 2557 goto out_resource; 2558 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2559 } 2560 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2561 p = xdr_reserve_space(xdr, 4); 2562 if (!p) 2563 goto out_resource; 2564 *p++ = cpu_to_be32(255); 2565 } 2566 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2567 p = xdr_reserve_space(xdr, 4); 2568 if (!p) 2569 goto out_resource; 2570 *p++ = cpu_to_be32(statfs.f_namelen); 2571 } 2572 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2573 p = xdr_reserve_space(xdr, 8); 2574 if (!p) 2575 goto out_resource; 2576 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2577 } 2578 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2579 p = xdr_reserve_space(xdr, 8); 2580 if (!p) 2581 goto out_resource; 2582 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2583 } 2584 if (bmval1 & FATTR4_WORD1_MODE) { 2585 p = xdr_reserve_space(xdr, 4); 2586 if (!p) 2587 goto out_resource; 2588 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2589 } 2590 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2591 p = xdr_reserve_space(xdr, 4); 2592 if (!p) 2593 goto out_resource; 2594 *p++ = cpu_to_be32(1); 2595 } 2596 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2597 p = xdr_reserve_space(xdr, 4); 2598 if (!p) 2599 goto out_resource; 2600 *p++ = cpu_to_be32(stat.nlink); 2601 } 2602 if (bmval1 & FATTR4_WORD1_OWNER) { 2603 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2604 if (status) 2605 goto out; 2606 } 2607 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2608 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2609 if (status) 2610 goto out; 2611 } 2612 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2613 p = xdr_reserve_space(xdr, 8); 2614 if (!p) 2615 goto out_resource; 2616 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2617 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2618 } 2619 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2620 p = xdr_reserve_space(xdr, 8); 2621 if (!p) 2622 goto out_resource; 2623 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2624 p = xdr_encode_hyper(p, dummy64); 2625 } 2626 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2627 p = xdr_reserve_space(xdr, 8); 2628 if (!p) 2629 goto out_resource; 2630 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2631 p = xdr_encode_hyper(p, dummy64); 2632 } 2633 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2634 p = xdr_reserve_space(xdr, 8); 2635 if (!p) 2636 goto out_resource; 2637 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2638 p = xdr_encode_hyper(p, dummy64); 2639 } 2640 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2641 p = xdr_reserve_space(xdr, 8); 2642 if (!p) 2643 goto out_resource; 2644 dummy64 = (u64)stat.blocks << 9; 2645 p = xdr_encode_hyper(p, dummy64); 2646 } 2647 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2648 p = xdr_reserve_space(xdr, 12); 2649 if (!p) 2650 goto out_resource; 2651 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2652 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2653 } 2654 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2655 p = xdr_reserve_space(xdr, 12); 2656 if (!p) 2657 goto out_resource; 2658 *p++ = cpu_to_be32(0); 2659 *p++ = cpu_to_be32(1); 2660 *p++ = cpu_to_be32(0); 2661 } 2662 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2663 p = xdr_reserve_space(xdr, 12); 2664 if (!p) 2665 goto out_resource; 2666 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2667 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2668 } 2669 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2670 p = xdr_reserve_space(xdr, 12); 2671 if (!p) 2672 goto out_resource; 2673 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2674 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2675 } 2676 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2677 p = xdr_reserve_space(xdr, 8); 2678 if (!p) 2679 goto out_resource; 2680 /* 2681 * Get parent's attributes if not ignoring crossmount 2682 * and this is the root of a cross-mounted filesystem. 2683 */ 2684 if (ignore_crossmnt == 0 && 2685 dentry == exp->ex_path.mnt->mnt_root) 2686 get_parent_attributes(exp, &stat); 2687 p = xdr_encode_hyper(p, stat.ino); 2688 } 2689 #ifdef CONFIG_NFSD_PNFS 2690 if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) || 2691 (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) { 2692 if (exp->ex_layout_type) { 2693 p = xdr_reserve_space(xdr, 8); 2694 if (!p) 2695 goto out_resource; 2696 *p++ = cpu_to_be32(1); 2697 *p++ = cpu_to_be32(exp->ex_layout_type); 2698 } else { 2699 p = xdr_reserve_space(xdr, 4); 2700 if (!p) 2701 goto out_resource; 2702 *p++ = cpu_to_be32(0); 2703 } 2704 } 2705 2706 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2707 p = xdr_reserve_space(xdr, 4); 2708 if (!p) 2709 goto out_resource; 2710 *p++ = cpu_to_be32(stat.blksize); 2711 } 2712 #endif /* CONFIG_NFSD_PNFS */ 2713 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2714 status = nfsd4_encode_security_label(xdr, rqstp, context, 2715 contextlen); 2716 if (status) 2717 goto out; 2718 } 2719 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2720 p = xdr_reserve_space(xdr, 16); 2721 if (!p) 2722 goto out_resource; 2723 *p++ = cpu_to_be32(3); 2724 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2725 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2726 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2727 } 2728 2729 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2730 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2731 status = nfs_ok; 2732 2733 out: 2734 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2735 if (context) 2736 security_release_secctx(context, contextlen); 2737 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2738 kfree(acl); 2739 if (tempfh) { 2740 fh_put(tempfh); 2741 kfree(tempfh); 2742 } 2743 if (status) 2744 xdr_truncate_encode(xdr, starting_len); 2745 return status; 2746 out_nfserr: 2747 status = nfserrno(err); 2748 goto out; 2749 out_resource: 2750 status = nfserr_resource; 2751 goto out; 2752 } 2753 2754 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2755 struct xdr_buf *buf, __be32 *p, int bytes) 2756 { 2757 xdr->scratch.iov_len = 0; 2758 memset(buf, 0, sizeof(struct xdr_buf)); 2759 buf->head[0].iov_base = p; 2760 buf->head[0].iov_len = 0; 2761 buf->len = 0; 2762 xdr->buf = buf; 2763 xdr->iov = buf->head; 2764 xdr->p = p; 2765 xdr->end = (void *)p + bytes; 2766 buf->buflen = bytes; 2767 } 2768 2769 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2770 struct svc_fh *fhp, struct svc_export *exp, 2771 struct dentry *dentry, u32 *bmval, 2772 struct svc_rqst *rqstp, int ignore_crossmnt) 2773 { 2774 struct xdr_buf dummy; 2775 struct xdr_stream xdr; 2776 __be32 ret; 2777 2778 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2779 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2780 ignore_crossmnt); 2781 *p = xdr.p; 2782 return ret; 2783 } 2784 2785 static inline int attributes_need_mount(u32 *bmval) 2786 { 2787 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2788 return 1; 2789 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2790 return 1; 2791 return 0; 2792 } 2793 2794 static __be32 2795 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2796 const char *name, int namlen) 2797 { 2798 struct svc_export *exp = cd->rd_fhp->fh_export; 2799 struct dentry *dentry; 2800 __be32 nfserr; 2801 int ignore_crossmnt = 0; 2802 2803 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2804 if (IS_ERR(dentry)) 2805 return nfserrno(PTR_ERR(dentry)); 2806 if (d_really_is_negative(dentry)) { 2807 /* 2808 * nfsd_buffered_readdir drops the i_mutex between 2809 * readdir and calling this callback, leaving a window 2810 * where this directory entry could have gone away. 2811 */ 2812 dput(dentry); 2813 return nfserr_noent; 2814 } 2815 2816 exp_get(exp); 2817 /* 2818 * In the case of a mountpoint, the client may be asking for 2819 * attributes that are only properties of the underlying filesystem 2820 * as opposed to the cross-mounted file system. In such a case, 2821 * we will not follow the cross mount and will fill the attribtutes 2822 * directly from the mountpoint dentry. 2823 */ 2824 if (nfsd_mountpoint(dentry, exp)) { 2825 int err; 2826 2827 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2828 && !attributes_need_mount(cd->rd_bmval)) { 2829 ignore_crossmnt = 1; 2830 goto out_encode; 2831 } 2832 /* 2833 * Why the heck aren't we just using nfsd_lookup?? 2834 * Different "."/".." handling? Something else? 2835 * At least, add a comment here to explain.... 2836 */ 2837 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2838 if (err) { 2839 nfserr = nfserrno(err); 2840 goto out_put; 2841 } 2842 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2843 if (nfserr) 2844 goto out_put; 2845 2846 } 2847 out_encode: 2848 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2849 cd->rd_rqstp, ignore_crossmnt); 2850 out_put: 2851 dput(dentry); 2852 exp_put(exp); 2853 return nfserr; 2854 } 2855 2856 static __be32 * 2857 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2858 { 2859 __be32 *p; 2860 2861 p = xdr_reserve_space(xdr, 20); 2862 if (!p) 2863 return NULL; 2864 *p++ = htonl(2); 2865 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2866 *p++ = htonl(0); /* bmval1 */ 2867 2868 *p++ = htonl(4); /* attribute length */ 2869 *p++ = nfserr; /* no htonl */ 2870 return p; 2871 } 2872 2873 static int 2874 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2875 loff_t offset, u64 ino, unsigned int d_type) 2876 { 2877 struct readdir_cd *ccd = ccdv; 2878 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2879 struct xdr_stream *xdr = cd->xdr; 2880 int start_offset = xdr->buf->len; 2881 int cookie_offset; 2882 u32 name_and_cookie; 2883 int entry_bytes; 2884 __be32 nfserr = nfserr_toosmall; 2885 __be64 wire_offset; 2886 __be32 *p; 2887 2888 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2889 if (name && isdotent(name, namlen)) { 2890 cd->common.err = nfs_ok; 2891 return 0; 2892 } 2893 2894 if (cd->cookie_offset) { 2895 wire_offset = cpu_to_be64(offset); 2896 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2897 &wire_offset, 8); 2898 } 2899 2900 p = xdr_reserve_space(xdr, 4); 2901 if (!p) 2902 goto fail; 2903 *p++ = xdr_one; /* mark entry present */ 2904 cookie_offset = xdr->buf->len; 2905 p = xdr_reserve_space(xdr, 3*4 + namlen); 2906 if (!p) 2907 goto fail; 2908 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2909 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2910 2911 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2912 switch (nfserr) { 2913 case nfs_ok: 2914 break; 2915 case nfserr_resource: 2916 nfserr = nfserr_toosmall; 2917 goto fail; 2918 case nfserr_noent: 2919 xdr_truncate_encode(xdr, start_offset); 2920 goto skip_entry; 2921 default: 2922 /* 2923 * If the client requested the RDATTR_ERROR attribute, 2924 * we stuff the error code into this attribute 2925 * and continue. If this attribute was not requested, 2926 * then in accordance with the spec, we fail the 2927 * entire READDIR operation(!) 2928 */ 2929 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2930 goto fail; 2931 p = nfsd4_encode_rdattr_error(xdr, nfserr); 2932 if (p == NULL) { 2933 nfserr = nfserr_toosmall; 2934 goto fail; 2935 } 2936 } 2937 nfserr = nfserr_toosmall; 2938 entry_bytes = xdr->buf->len - start_offset; 2939 if (entry_bytes > cd->rd_maxcount) 2940 goto fail; 2941 cd->rd_maxcount -= entry_bytes; 2942 /* 2943 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 2944 * let's always let through the first entry, at least: 2945 */ 2946 if (!cd->rd_dircount) 2947 goto fail; 2948 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 2949 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 2950 goto fail; 2951 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 2952 2953 cd->cookie_offset = cookie_offset; 2954 skip_entry: 2955 cd->common.err = nfs_ok; 2956 return 0; 2957 fail: 2958 xdr_truncate_encode(xdr, start_offset); 2959 cd->common.err = nfserr; 2960 return -EINVAL; 2961 } 2962 2963 static __be32 2964 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 2965 { 2966 __be32 *p; 2967 2968 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 2969 if (!p) 2970 return nfserr_resource; 2971 *p++ = cpu_to_be32(sid->si_generation); 2972 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 2973 sizeof(stateid_opaque_t)); 2974 return 0; 2975 } 2976 2977 static __be32 2978 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2979 { 2980 struct xdr_stream *xdr = &resp->xdr; 2981 __be32 *p; 2982 2983 if (!nfserr) { 2984 p = xdr_reserve_space(xdr, 8); 2985 if (!p) 2986 return nfserr_resource; 2987 *p++ = cpu_to_be32(access->ac_supported); 2988 *p++ = cpu_to_be32(access->ac_resp_access); 2989 } 2990 return nfserr; 2991 } 2992 2993 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2994 { 2995 struct xdr_stream *xdr = &resp->xdr; 2996 __be32 *p; 2997 2998 if (!nfserr) { 2999 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3000 if (!p) 3001 return nfserr_resource; 3002 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3003 NFS4_MAX_SESSIONID_LEN); 3004 *p++ = cpu_to_be32(bcts->dir); 3005 /* Sorry, we do not yet support RDMA over 4.1: */ 3006 *p++ = cpu_to_be32(0); 3007 } 3008 return nfserr; 3009 } 3010 3011 static __be32 3012 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3013 { 3014 struct xdr_stream *xdr = &resp->xdr; 3015 3016 if (!nfserr) 3017 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3018 3019 return nfserr; 3020 } 3021 3022 3023 static __be32 3024 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3025 { 3026 struct xdr_stream *xdr = &resp->xdr; 3027 __be32 *p; 3028 3029 if (!nfserr) { 3030 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3031 if (!p) 3032 return nfserr_resource; 3033 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3034 NFS4_VERIFIER_SIZE); 3035 } 3036 return nfserr; 3037 } 3038 3039 static __be32 3040 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3041 { 3042 struct xdr_stream *xdr = &resp->xdr; 3043 __be32 *p; 3044 3045 if (!nfserr) { 3046 p = xdr_reserve_space(xdr, 32); 3047 if (!p) 3048 return nfserr_resource; 3049 p = encode_cinfo(p, &create->cr_cinfo); 3050 *p++ = cpu_to_be32(2); 3051 *p++ = cpu_to_be32(create->cr_bmval[0]); 3052 *p++ = cpu_to_be32(create->cr_bmval[1]); 3053 } 3054 return nfserr; 3055 } 3056 3057 static __be32 3058 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3059 { 3060 struct svc_fh *fhp = getattr->ga_fhp; 3061 struct xdr_stream *xdr = &resp->xdr; 3062 3063 if (nfserr) 3064 return nfserr; 3065 3066 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3067 getattr->ga_bmval, 3068 resp->rqstp, 0); 3069 return nfserr; 3070 } 3071 3072 static __be32 3073 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3074 { 3075 struct xdr_stream *xdr = &resp->xdr; 3076 struct svc_fh *fhp = *fhpp; 3077 unsigned int len; 3078 __be32 *p; 3079 3080 if (!nfserr) { 3081 len = fhp->fh_handle.fh_size; 3082 p = xdr_reserve_space(xdr, len + 4); 3083 if (!p) 3084 return nfserr_resource; 3085 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3086 } 3087 return nfserr; 3088 } 3089 3090 /* 3091 * Including all fields other than the name, a LOCK4denied structure requires 3092 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3093 */ 3094 static __be32 3095 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3096 { 3097 struct xdr_netobj *conf = &ld->ld_owner; 3098 __be32 *p; 3099 3100 again: 3101 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3102 if (!p) { 3103 /* 3104 * Don't fail to return the result just because we can't 3105 * return the conflicting open: 3106 */ 3107 if (conf->len) { 3108 kfree(conf->data); 3109 conf->len = 0; 3110 conf->data = NULL; 3111 goto again; 3112 } 3113 return nfserr_resource; 3114 } 3115 p = xdr_encode_hyper(p, ld->ld_start); 3116 p = xdr_encode_hyper(p, ld->ld_length); 3117 *p++ = cpu_to_be32(ld->ld_type); 3118 if (conf->len) { 3119 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3120 p = xdr_encode_opaque(p, conf->data, conf->len); 3121 kfree(conf->data); 3122 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3123 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3124 *p++ = cpu_to_be32(0); /* length of owner name */ 3125 } 3126 return nfserr_denied; 3127 } 3128 3129 static __be32 3130 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3131 { 3132 struct xdr_stream *xdr = &resp->xdr; 3133 3134 if (!nfserr) 3135 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3136 else if (nfserr == nfserr_denied) 3137 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3138 3139 return nfserr; 3140 } 3141 3142 static __be32 3143 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3144 { 3145 struct xdr_stream *xdr = &resp->xdr; 3146 3147 if (nfserr == nfserr_denied) 3148 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3149 return nfserr; 3150 } 3151 3152 static __be32 3153 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3154 { 3155 struct xdr_stream *xdr = &resp->xdr; 3156 3157 if (!nfserr) 3158 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3159 3160 return nfserr; 3161 } 3162 3163 3164 static __be32 3165 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3166 { 3167 struct xdr_stream *xdr = &resp->xdr; 3168 __be32 *p; 3169 3170 if (!nfserr) { 3171 p = xdr_reserve_space(xdr, 20); 3172 if (!p) 3173 return nfserr_resource; 3174 p = encode_cinfo(p, &link->li_cinfo); 3175 } 3176 return nfserr; 3177 } 3178 3179 3180 static __be32 3181 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3182 { 3183 struct xdr_stream *xdr = &resp->xdr; 3184 __be32 *p; 3185 3186 if (nfserr) 3187 goto out; 3188 3189 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3190 if (nfserr) 3191 goto out; 3192 p = xdr_reserve_space(xdr, 40); 3193 if (!p) 3194 return nfserr_resource; 3195 p = encode_cinfo(p, &open->op_cinfo); 3196 *p++ = cpu_to_be32(open->op_rflags); 3197 *p++ = cpu_to_be32(2); 3198 *p++ = cpu_to_be32(open->op_bmval[0]); 3199 *p++ = cpu_to_be32(open->op_bmval[1]); 3200 *p++ = cpu_to_be32(open->op_delegate_type); 3201 3202 switch (open->op_delegate_type) { 3203 case NFS4_OPEN_DELEGATE_NONE: 3204 break; 3205 case NFS4_OPEN_DELEGATE_READ: 3206 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3207 if (nfserr) 3208 return nfserr; 3209 p = xdr_reserve_space(xdr, 20); 3210 if (!p) 3211 return nfserr_resource; 3212 *p++ = cpu_to_be32(open->op_recall); 3213 3214 /* 3215 * TODO: ACE's in delegations 3216 */ 3217 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3218 *p++ = cpu_to_be32(0); 3219 *p++ = cpu_to_be32(0); 3220 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3221 break; 3222 case NFS4_OPEN_DELEGATE_WRITE: 3223 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3224 if (nfserr) 3225 return nfserr; 3226 p = xdr_reserve_space(xdr, 32); 3227 if (!p) 3228 return nfserr_resource; 3229 *p++ = cpu_to_be32(0); 3230 3231 /* 3232 * TODO: space_limit's in delegations 3233 */ 3234 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3235 *p++ = cpu_to_be32(~(u32)0); 3236 *p++ = cpu_to_be32(~(u32)0); 3237 3238 /* 3239 * TODO: ACE's in delegations 3240 */ 3241 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3242 *p++ = cpu_to_be32(0); 3243 *p++ = cpu_to_be32(0); 3244 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3245 break; 3246 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3247 switch (open->op_why_no_deleg) { 3248 case WND4_CONTENTION: 3249 case WND4_RESOURCE: 3250 p = xdr_reserve_space(xdr, 8); 3251 if (!p) 3252 return nfserr_resource; 3253 *p++ = cpu_to_be32(open->op_why_no_deleg); 3254 /* deleg signaling not supported yet: */ 3255 *p++ = cpu_to_be32(0); 3256 break; 3257 default: 3258 p = xdr_reserve_space(xdr, 4); 3259 if (!p) 3260 return nfserr_resource; 3261 *p++ = cpu_to_be32(open->op_why_no_deleg); 3262 } 3263 break; 3264 default: 3265 BUG(); 3266 } 3267 /* XXX save filehandle here */ 3268 out: 3269 return nfserr; 3270 } 3271 3272 static __be32 3273 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3274 { 3275 struct xdr_stream *xdr = &resp->xdr; 3276 3277 if (!nfserr) 3278 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3279 3280 return nfserr; 3281 } 3282 3283 static __be32 3284 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3285 { 3286 struct xdr_stream *xdr = &resp->xdr; 3287 3288 if (!nfserr) 3289 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3290 3291 return nfserr; 3292 } 3293 3294 static __be32 nfsd4_encode_splice_read( 3295 struct nfsd4_compoundres *resp, 3296 struct nfsd4_read *read, 3297 struct file *file, unsigned long maxcount) 3298 { 3299 struct xdr_stream *xdr = &resp->xdr; 3300 struct xdr_buf *buf = xdr->buf; 3301 u32 eof; 3302 int space_left; 3303 __be32 nfserr; 3304 __be32 *p = xdr->p - 2; 3305 3306 /* Make sure there will be room for padding if needed */ 3307 if (xdr->end - xdr->p < 1) 3308 return nfserr_resource; 3309 3310 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3311 read->rd_offset, &maxcount); 3312 if (nfserr) { 3313 /* 3314 * nfsd_splice_actor may have already messed with the 3315 * page length; reset it so as not to confuse 3316 * xdr_truncate_encode: 3317 */ 3318 buf->page_len = 0; 3319 return nfserr; 3320 } 3321 3322 eof = (read->rd_offset + maxcount >= 3323 d_inode(read->rd_fhp->fh_dentry)->i_size); 3324 3325 *(p++) = htonl(eof); 3326 *(p++) = htonl(maxcount); 3327 3328 buf->page_len = maxcount; 3329 buf->len += maxcount; 3330 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3331 / PAGE_SIZE; 3332 3333 /* Use rest of head for padding and remaining ops: */ 3334 buf->tail[0].iov_base = xdr->p; 3335 buf->tail[0].iov_len = 0; 3336 xdr->iov = buf->tail; 3337 if (maxcount&3) { 3338 int pad = 4 - (maxcount&3); 3339 3340 *(xdr->p++) = 0; 3341 3342 buf->tail[0].iov_base += maxcount&3; 3343 buf->tail[0].iov_len = pad; 3344 buf->len += pad; 3345 } 3346 3347 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3348 buf->buflen - buf->len); 3349 buf->buflen = buf->len + space_left; 3350 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3351 3352 return 0; 3353 } 3354 3355 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3356 struct nfsd4_read *read, 3357 struct file *file, unsigned long maxcount) 3358 { 3359 struct xdr_stream *xdr = &resp->xdr; 3360 u32 eof; 3361 int v; 3362 int starting_len = xdr->buf->len - 8; 3363 long len; 3364 int thislen; 3365 __be32 nfserr; 3366 __be32 tmp; 3367 __be32 *p; 3368 u32 zzz = 0; 3369 int pad; 3370 3371 len = maxcount; 3372 v = 0; 3373 3374 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3375 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3376 WARN_ON_ONCE(!p); 3377 resp->rqstp->rq_vec[v].iov_base = p; 3378 resp->rqstp->rq_vec[v].iov_len = thislen; 3379 v++; 3380 len -= thislen; 3381 3382 while (len) { 3383 thislen = min_t(long, len, PAGE_SIZE); 3384 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3385 WARN_ON_ONCE(!p); 3386 resp->rqstp->rq_vec[v].iov_base = p; 3387 resp->rqstp->rq_vec[v].iov_len = thislen; 3388 v++; 3389 len -= thislen; 3390 } 3391 read->rd_vlen = v; 3392 3393 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3394 read->rd_vlen, &maxcount); 3395 if (nfserr) 3396 return nfserr; 3397 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3398 3399 eof = (read->rd_offset + maxcount >= 3400 d_inode(read->rd_fhp->fh_dentry)->i_size); 3401 3402 tmp = htonl(eof); 3403 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3404 tmp = htonl(maxcount); 3405 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3406 3407 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3408 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3409 &zzz, pad); 3410 return 0; 3411 3412 } 3413 3414 static __be32 3415 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3416 struct nfsd4_read *read) 3417 { 3418 unsigned long maxcount; 3419 struct xdr_stream *xdr = &resp->xdr; 3420 struct file *file = read->rd_filp; 3421 int starting_len = xdr->buf->len; 3422 struct raparms *ra = NULL; 3423 __be32 *p; 3424 3425 if (nfserr) 3426 goto out; 3427 3428 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3429 if (!p) { 3430 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3431 nfserr = nfserr_resource; 3432 goto out; 3433 } 3434 if (resp->xdr.buf->page_len && 3435 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3436 WARN_ON_ONCE(1); 3437 nfserr = nfserr_resource; 3438 goto out; 3439 } 3440 xdr_commit_encode(xdr); 3441 3442 maxcount = svc_max_payload(resp->rqstp); 3443 maxcount = min_t(unsigned long, maxcount, 3444 (xdr->buf->buflen - xdr->buf->len)); 3445 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3446 3447 if (read->rd_tmp_file) 3448 ra = nfsd_init_raparms(file); 3449 3450 if (file->f_op->splice_read && 3451 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3452 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3453 else 3454 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3455 3456 if (ra) 3457 nfsd_put_raparams(file, ra); 3458 3459 if (nfserr) 3460 xdr_truncate_encode(xdr, starting_len); 3461 3462 out: 3463 if (file) 3464 fput(file); 3465 return nfserr; 3466 } 3467 3468 static __be32 3469 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3470 { 3471 int maxcount; 3472 __be32 wire_count; 3473 int zero = 0; 3474 struct xdr_stream *xdr = &resp->xdr; 3475 int length_offset = xdr->buf->len; 3476 __be32 *p; 3477 3478 if (nfserr) 3479 return nfserr; 3480 3481 p = xdr_reserve_space(xdr, 4); 3482 if (!p) 3483 return nfserr_resource; 3484 maxcount = PAGE_SIZE; 3485 3486 p = xdr_reserve_space(xdr, maxcount); 3487 if (!p) 3488 return nfserr_resource; 3489 /* 3490 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3491 * if they would overflow the buffer. Is this kosher in NFSv4? If 3492 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3493 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3494 */ 3495 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3496 (char *)p, &maxcount); 3497 if (nfserr == nfserr_isdir) 3498 nfserr = nfserr_inval; 3499 if (nfserr) { 3500 xdr_truncate_encode(xdr, length_offset); 3501 return nfserr; 3502 } 3503 3504 wire_count = htonl(maxcount); 3505 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3506 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3507 if (maxcount & 3) 3508 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3509 &zero, 4 - (maxcount&3)); 3510 return 0; 3511 } 3512 3513 static __be32 3514 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3515 { 3516 int maxcount; 3517 int bytes_left; 3518 loff_t offset; 3519 __be64 wire_offset; 3520 struct xdr_stream *xdr = &resp->xdr; 3521 int starting_len = xdr->buf->len; 3522 __be32 *p; 3523 3524 if (nfserr) 3525 return nfserr; 3526 3527 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3528 if (!p) 3529 return nfserr_resource; 3530 3531 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3532 *p++ = cpu_to_be32(0); 3533 *p++ = cpu_to_be32(0); 3534 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3535 - (char *)resp->xdr.buf->head[0].iov_base; 3536 3537 /* 3538 * Number of bytes left for directory entries allowing for the 3539 * final 8 bytes of the readdir and a following failed op: 3540 */ 3541 bytes_left = xdr->buf->buflen - xdr->buf->len 3542 - COMPOUND_ERR_SLACK_SPACE - 8; 3543 if (bytes_left < 0) { 3544 nfserr = nfserr_resource; 3545 goto err_no_verf; 3546 } 3547 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3548 /* 3549 * Note the rfc defines rd_maxcount as the size of the 3550 * READDIR4resok structure, which includes the verifier above 3551 * and the 8 bytes encoded at the end of this function: 3552 */ 3553 if (maxcount < 16) { 3554 nfserr = nfserr_toosmall; 3555 goto err_no_verf; 3556 } 3557 maxcount = min_t(int, maxcount-16, bytes_left); 3558 3559 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3560 if (!readdir->rd_dircount) 3561 readdir->rd_dircount = INT_MAX; 3562 3563 readdir->xdr = xdr; 3564 readdir->rd_maxcount = maxcount; 3565 readdir->common.err = 0; 3566 readdir->cookie_offset = 0; 3567 3568 offset = readdir->rd_cookie; 3569 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3570 &offset, 3571 &readdir->common, nfsd4_encode_dirent); 3572 if (nfserr == nfs_ok && 3573 readdir->common.err == nfserr_toosmall && 3574 xdr->buf->len == starting_len + 8) { 3575 /* nothing encoded; which limit did we hit?: */ 3576 if (maxcount - 16 < bytes_left) 3577 /* It was the fault of rd_maxcount: */ 3578 nfserr = nfserr_toosmall; 3579 else 3580 /* We ran out of buffer space: */ 3581 nfserr = nfserr_resource; 3582 } 3583 if (nfserr) 3584 goto err_no_verf; 3585 3586 if (readdir->cookie_offset) { 3587 wire_offset = cpu_to_be64(offset); 3588 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3589 &wire_offset, 8); 3590 } 3591 3592 p = xdr_reserve_space(xdr, 8); 3593 if (!p) { 3594 WARN_ON_ONCE(1); 3595 goto err_no_verf; 3596 } 3597 *p++ = 0; /* no more entries */ 3598 *p++ = htonl(readdir->common.err == nfserr_eof); 3599 3600 return 0; 3601 err_no_verf: 3602 xdr_truncate_encode(xdr, starting_len); 3603 return nfserr; 3604 } 3605 3606 static __be32 3607 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3608 { 3609 struct xdr_stream *xdr = &resp->xdr; 3610 __be32 *p; 3611 3612 if (!nfserr) { 3613 p = xdr_reserve_space(xdr, 20); 3614 if (!p) 3615 return nfserr_resource; 3616 p = encode_cinfo(p, &remove->rm_cinfo); 3617 } 3618 return nfserr; 3619 } 3620 3621 static __be32 3622 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3623 { 3624 struct xdr_stream *xdr = &resp->xdr; 3625 __be32 *p; 3626 3627 if (!nfserr) { 3628 p = xdr_reserve_space(xdr, 40); 3629 if (!p) 3630 return nfserr_resource; 3631 p = encode_cinfo(p, &rename->rn_sinfo); 3632 p = encode_cinfo(p, &rename->rn_tinfo); 3633 } 3634 return nfserr; 3635 } 3636 3637 static __be32 3638 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3639 __be32 nfserr, struct svc_export *exp) 3640 { 3641 u32 i, nflavs, supported; 3642 struct exp_flavor_info *flavs; 3643 struct exp_flavor_info def_flavs[2]; 3644 __be32 *p, *flavorsp; 3645 static bool report = true; 3646 3647 if (nfserr) 3648 goto out; 3649 nfserr = nfserr_resource; 3650 if (exp->ex_nflavors) { 3651 flavs = exp->ex_flavors; 3652 nflavs = exp->ex_nflavors; 3653 } else { /* Handling of some defaults in absence of real secinfo: */ 3654 flavs = def_flavs; 3655 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3656 nflavs = 2; 3657 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3658 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3659 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3660 nflavs = 1; 3661 flavs[0].pseudoflavor 3662 = svcauth_gss_flavor(exp->ex_client); 3663 } else { 3664 nflavs = 1; 3665 flavs[0].pseudoflavor 3666 = exp->ex_client->flavour->flavour; 3667 } 3668 } 3669 3670 supported = 0; 3671 p = xdr_reserve_space(xdr, 4); 3672 if (!p) 3673 goto out; 3674 flavorsp = p++; /* to be backfilled later */ 3675 3676 for (i = 0; i < nflavs; i++) { 3677 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3678 struct rpcsec_gss_info info; 3679 3680 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3681 supported++; 3682 p = xdr_reserve_space(xdr, 4 + 4 + 3683 XDR_LEN(info.oid.len) + 4 + 4); 3684 if (!p) 3685 goto out; 3686 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3687 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3688 *p++ = cpu_to_be32(info.qop); 3689 *p++ = cpu_to_be32(info.service); 3690 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3691 supported++; 3692 p = xdr_reserve_space(xdr, 4); 3693 if (!p) 3694 goto out; 3695 *p++ = cpu_to_be32(pf); 3696 } else { 3697 if (report) 3698 pr_warn("NFS: SECINFO: security flavor %u " 3699 "is not supported\n", pf); 3700 } 3701 } 3702 3703 if (nflavs != supported) 3704 report = false; 3705 *flavorsp = htonl(supported); 3706 nfserr = 0; 3707 out: 3708 if (exp) 3709 exp_put(exp); 3710 return nfserr; 3711 } 3712 3713 static __be32 3714 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3715 struct nfsd4_secinfo *secinfo) 3716 { 3717 struct xdr_stream *xdr = &resp->xdr; 3718 3719 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3720 } 3721 3722 static __be32 3723 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3724 struct nfsd4_secinfo_no_name *secinfo) 3725 { 3726 struct xdr_stream *xdr = &resp->xdr; 3727 3728 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3729 } 3730 3731 /* 3732 * The SETATTR encode routine is special -- it always encodes a bitmap, 3733 * regardless of the error status. 3734 */ 3735 static __be32 3736 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3737 { 3738 struct xdr_stream *xdr = &resp->xdr; 3739 __be32 *p; 3740 3741 p = xdr_reserve_space(xdr, 16); 3742 if (!p) 3743 return nfserr_resource; 3744 if (nfserr) { 3745 *p++ = cpu_to_be32(3); 3746 *p++ = cpu_to_be32(0); 3747 *p++ = cpu_to_be32(0); 3748 *p++ = cpu_to_be32(0); 3749 } 3750 else { 3751 *p++ = cpu_to_be32(3); 3752 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3753 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3754 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3755 } 3756 return nfserr; 3757 } 3758 3759 static __be32 3760 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3761 { 3762 struct xdr_stream *xdr = &resp->xdr; 3763 __be32 *p; 3764 3765 if (!nfserr) { 3766 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3767 if (!p) 3768 return nfserr_resource; 3769 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3770 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3771 NFS4_VERIFIER_SIZE); 3772 } 3773 else if (nfserr == nfserr_clid_inuse) { 3774 p = xdr_reserve_space(xdr, 8); 3775 if (!p) 3776 return nfserr_resource; 3777 *p++ = cpu_to_be32(0); 3778 *p++ = cpu_to_be32(0); 3779 } 3780 return nfserr; 3781 } 3782 3783 static __be32 3784 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3785 { 3786 struct xdr_stream *xdr = &resp->xdr; 3787 __be32 *p; 3788 3789 if (!nfserr) { 3790 p = xdr_reserve_space(xdr, 16); 3791 if (!p) 3792 return nfserr_resource; 3793 *p++ = cpu_to_be32(write->wr_bytes_written); 3794 *p++ = cpu_to_be32(write->wr_how_written); 3795 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3796 NFS4_VERIFIER_SIZE); 3797 } 3798 return nfserr; 3799 } 3800 3801 static const u32 nfs4_minimal_spo_must_enforce[2] = { 3802 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 3803 1 << (OP_EXCHANGE_ID - 32) | 3804 1 << (OP_CREATE_SESSION - 32) | 3805 1 << (OP_DESTROY_SESSION - 32) | 3806 1 << (OP_DESTROY_CLIENTID - 32) 3807 }; 3808 3809 static __be32 3810 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3811 struct nfsd4_exchange_id *exid) 3812 { 3813 struct xdr_stream *xdr = &resp->xdr; 3814 __be32 *p; 3815 char *major_id; 3816 char *server_scope; 3817 int major_id_sz; 3818 int server_scope_sz; 3819 uint64_t minor_id = 0; 3820 3821 if (nfserr) 3822 return nfserr; 3823 3824 major_id = utsname()->nodename; 3825 major_id_sz = strlen(major_id); 3826 server_scope = utsname()->nodename; 3827 server_scope_sz = strlen(server_scope); 3828 3829 p = xdr_reserve_space(xdr, 3830 8 /* eir_clientid */ + 3831 4 /* eir_sequenceid */ + 3832 4 /* eir_flags */ + 3833 4 /* spr_how */); 3834 if (!p) 3835 return nfserr_resource; 3836 3837 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3838 *p++ = cpu_to_be32(exid->seqid); 3839 *p++ = cpu_to_be32(exid->flags); 3840 3841 *p++ = cpu_to_be32(exid->spa_how); 3842 3843 switch (exid->spa_how) { 3844 case SP4_NONE: 3845 break; 3846 case SP4_MACH_CRED: 3847 /* spo_must_enforce, spo_must_allow */ 3848 p = xdr_reserve_space(xdr, 16); 3849 if (!p) 3850 return nfserr_resource; 3851 3852 /* spo_must_enforce bitmap: */ 3853 *p++ = cpu_to_be32(2); 3854 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); 3855 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); 3856 /* empty spo_must_allow bitmap: */ 3857 *p++ = cpu_to_be32(0); 3858 3859 break; 3860 default: 3861 WARN_ON_ONCE(1); 3862 } 3863 3864 p = xdr_reserve_space(xdr, 3865 8 /* so_minor_id */ + 3866 4 /* so_major_id.len */ + 3867 (XDR_QUADLEN(major_id_sz) * 4) + 3868 4 /* eir_server_scope.len */ + 3869 (XDR_QUADLEN(server_scope_sz) * 4) + 3870 4 /* eir_server_impl_id.count (0) */); 3871 if (!p) 3872 return nfserr_resource; 3873 3874 /* The server_owner struct */ 3875 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3876 /* major id */ 3877 p = xdr_encode_opaque(p, major_id, major_id_sz); 3878 3879 /* Server scope */ 3880 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3881 3882 /* Implementation id */ 3883 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3884 return 0; 3885 } 3886 3887 static __be32 3888 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3889 struct nfsd4_create_session *sess) 3890 { 3891 struct xdr_stream *xdr = &resp->xdr; 3892 __be32 *p; 3893 3894 if (nfserr) 3895 return nfserr; 3896 3897 p = xdr_reserve_space(xdr, 24); 3898 if (!p) 3899 return nfserr_resource; 3900 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3901 NFS4_MAX_SESSIONID_LEN); 3902 *p++ = cpu_to_be32(sess->seqid); 3903 *p++ = cpu_to_be32(sess->flags); 3904 3905 p = xdr_reserve_space(xdr, 28); 3906 if (!p) 3907 return nfserr_resource; 3908 *p++ = cpu_to_be32(0); /* headerpadsz */ 3909 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3910 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3911 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3912 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3913 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 3914 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 3915 3916 if (sess->fore_channel.nr_rdma_attrs) { 3917 p = xdr_reserve_space(xdr, 4); 3918 if (!p) 3919 return nfserr_resource; 3920 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 3921 } 3922 3923 p = xdr_reserve_space(xdr, 28); 3924 if (!p) 3925 return nfserr_resource; 3926 *p++ = cpu_to_be32(0); /* headerpadsz */ 3927 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 3928 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 3929 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 3930 *p++ = cpu_to_be32(sess->back_channel.maxops); 3931 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 3932 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 3933 3934 if (sess->back_channel.nr_rdma_attrs) { 3935 p = xdr_reserve_space(xdr, 4); 3936 if (!p) 3937 return nfserr_resource; 3938 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 3939 } 3940 return 0; 3941 } 3942 3943 static __be32 3944 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 3945 struct nfsd4_sequence *seq) 3946 { 3947 struct xdr_stream *xdr = &resp->xdr; 3948 __be32 *p; 3949 3950 if (nfserr) 3951 return nfserr; 3952 3953 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 3954 if (!p) 3955 return nfserr_resource; 3956 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 3957 NFS4_MAX_SESSIONID_LEN); 3958 *p++ = cpu_to_be32(seq->seqid); 3959 *p++ = cpu_to_be32(seq->slotid); 3960 /* Note slotid's are numbered from zero: */ 3961 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 3962 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 3963 *p++ = cpu_to_be32(seq->status_flags); 3964 3965 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 3966 return 0; 3967 } 3968 3969 static __be32 3970 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 3971 struct nfsd4_test_stateid *test_stateid) 3972 { 3973 struct xdr_stream *xdr = &resp->xdr; 3974 struct nfsd4_test_stateid_id *stateid, *next; 3975 __be32 *p; 3976 3977 if (nfserr) 3978 return nfserr; 3979 3980 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 3981 if (!p) 3982 return nfserr_resource; 3983 *p++ = htonl(test_stateid->ts_num_ids); 3984 3985 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 3986 *p++ = stateid->ts_id_status; 3987 } 3988 3989 return nfserr; 3990 } 3991 3992 #ifdef CONFIG_NFSD_PNFS 3993 static __be32 3994 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3995 struct nfsd4_getdeviceinfo *gdev) 3996 { 3997 struct xdr_stream *xdr = &resp->xdr; 3998 const struct nfsd4_layout_ops *ops = 3999 nfsd4_layout_ops[gdev->gd_layout_type]; 4000 u32 starting_len = xdr->buf->len, needed_len; 4001 __be32 *p; 4002 4003 dprintk("%s: err %d\n", __func__, nfserr); 4004 if (nfserr) 4005 goto out; 4006 4007 nfserr = nfserr_resource; 4008 p = xdr_reserve_space(xdr, 4); 4009 if (!p) 4010 goto out; 4011 4012 *p++ = cpu_to_be32(gdev->gd_layout_type); 4013 4014 /* If maxcount is 0 then just update notifications */ 4015 if (gdev->gd_maxcount != 0) { 4016 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4017 if (nfserr) { 4018 /* 4019 * We don't bother to burden the layout drivers with 4020 * enforcing gd_maxcount, just tell the client to 4021 * come back with a bigger buffer if it's not enough. 4022 */ 4023 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4024 goto toosmall; 4025 goto out; 4026 } 4027 } 4028 4029 nfserr = nfserr_resource; 4030 if (gdev->gd_notify_types) { 4031 p = xdr_reserve_space(xdr, 4 + 4); 4032 if (!p) 4033 goto out; 4034 *p++ = cpu_to_be32(1); /* bitmap length */ 4035 *p++ = cpu_to_be32(gdev->gd_notify_types); 4036 } else { 4037 p = xdr_reserve_space(xdr, 4); 4038 if (!p) 4039 goto out; 4040 *p++ = 0; 4041 } 4042 4043 nfserr = 0; 4044 out: 4045 kfree(gdev->gd_device); 4046 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4047 return nfserr; 4048 4049 toosmall: 4050 dprintk("%s: maxcount too small\n", __func__); 4051 needed_len = xdr->buf->len + 4 /* notifications */; 4052 xdr_truncate_encode(xdr, starting_len); 4053 p = xdr_reserve_space(xdr, 4); 4054 if (!p) { 4055 nfserr = nfserr_resource; 4056 } else { 4057 *p++ = cpu_to_be32(needed_len); 4058 nfserr = nfserr_toosmall; 4059 } 4060 goto out; 4061 } 4062 4063 static __be32 4064 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4065 struct nfsd4_layoutget *lgp) 4066 { 4067 struct xdr_stream *xdr = &resp->xdr; 4068 const struct nfsd4_layout_ops *ops = 4069 nfsd4_layout_ops[lgp->lg_layout_type]; 4070 __be32 *p; 4071 4072 dprintk("%s: err %d\n", __func__, nfserr); 4073 if (nfserr) 4074 goto out; 4075 4076 nfserr = nfserr_resource; 4077 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4078 if (!p) 4079 goto out; 4080 4081 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4082 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4083 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4084 sizeof(stateid_opaque_t)); 4085 4086 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4087 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4088 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4089 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4090 *p++ = cpu_to_be32(lgp->lg_layout_type); 4091 4092 nfserr = ops->encode_layoutget(xdr, lgp); 4093 out: 4094 kfree(lgp->lg_content); 4095 return nfserr; 4096 } 4097 4098 static __be32 4099 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4100 struct nfsd4_layoutcommit *lcp) 4101 { 4102 struct xdr_stream *xdr = &resp->xdr; 4103 __be32 *p; 4104 4105 if (nfserr) 4106 return nfserr; 4107 4108 p = xdr_reserve_space(xdr, 4); 4109 if (!p) 4110 return nfserr_resource; 4111 *p++ = cpu_to_be32(lcp->lc_size_chg); 4112 if (lcp->lc_size_chg) { 4113 p = xdr_reserve_space(xdr, 8); 4114 if (!p) 4115 return nfserr_resource; 4116 p = xdr_encode_hyper(p, lcp->lc_newsize); 4117 } 4118 4119 return nfs_ok; 4120 } 4121 4122 static __be32 4123 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4124 struct nfsd4_layoutreturn *lrp) 4125 { 4126 struct xdr_stream *xdr = &resp->xdr; 4127 __be32 *p; 4128 4129 if (nfserr) 4130 return nfserr; 4131 4132 p = xdr_reserve_space(xdr, 4); 4133 if (!p) 4134 return nfserr_resource; 4135 *p++ = cpu_to_be32(lrp->lrs_present); 4136 if (lrp->lrs_present) 4137 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4138 return nfs_ok; 4139 } 4140 #endif /* CONFIG_NFSD_PNFS */ 4141 4142 static __be32 4143 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4144 struct nfsd4_seek *seek) 4145 { 4146 __be32 *p; 4147 4148 if (nfserr) 4149 return nfserr; 4150 4151 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4152 *p++ = cpu_to_be32(seek->seek_eof); 4153 p = xdr_encode_hyper(p, seek->seek_pos); 4154 4155 return nfserr; 4156 } 4157 4158 static __be32 4159 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4160 { 4161 return nfserr; 4162 } 4163 4164 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4165 4166 /* 4167 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4168 * since we don't need to filter out obsolete ops as this is 4169 * done in the decoding phase. 4170 */ 4171 static nfsd4_enc nfsd4_enc_ops[] = { 4172 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4173 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4174 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4175 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4176 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4177 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4178 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4179 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4180 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4181 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4182 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4183 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4184 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4185 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4186 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4187 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4188 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4189 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4190 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4191 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4192 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4193 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4194 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4195 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4196 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4197 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4198 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4199 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4200 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4201 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4202 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4203 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4204 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4205 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4206 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4207 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4208 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4209 4210 /* NFSv4.1 operations */ 4211 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4212 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4213 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4214 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4215 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4216 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4217 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4218 #ifdef CONFIG_NFSD_PNFS 4219 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4220 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4221 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4222 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4223 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4224 #else 4225 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4226 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4227 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4228 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4229 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4230 #endif 4231 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4232 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4233 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4234 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4235 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4236 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4237 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4238 4239 /* NFSv4.2 operations */ 4240 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4241 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, 4242 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4243 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4244 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4245 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4246 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4247 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4248 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4249 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4250 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4251 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4252 }; 4253 4254 /* 4255 * Calculate whether we still have space to encode repsize bytes. 4256 * There are two considerations: 4257 * - For NFS versions >=4.1, the size of the reply must stay within 4258 * session limits 4259 * - For all NFS versions, we must stay within limited preallocated 4260 * buffer space. 4261 * 4262 * This is called before the operation is processed, so can only provide 4263 * an upper estimate. For some nonidempotent operations (such as 4264 * getattr), it's not necessarily a problem if that estimate is wrong, 4265 * as we can fail it after processing without significant side effects. 4266 */ 4267 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4268 { 4269 struct xdr_buf *buf = &resp->rqstp->rq_res; 4270 struct nfsd4_slot *slot = resp->cstate.slot; 4271 4272 if (buf->len + respsize <= buf->buflen) 4273 return nfs_ok; 4274 if (!nfsd4_has_session(&resp->cstate)) 4275 return nfserr_resource; 4276 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4277 WARN_ON_ONCE(1); 4278 return nfserr_rep_too_big_to_cache; 4279 } 4280 return nfserr_rep_too_big; 4281 } 4282 4283 void 4284 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4285 { 4286 struct xdr_stream *xdr = &resp->xdr; 4287 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4288 struct svc_rqst *rqstp = resp->rqstp; 4289 int post_err_offset; 4290 nfsd4_enc encoder; 4291 __be32 *p; 4292 4293 p = xdr_reserve_space(xdr, 8); 4294 if (!p) { 4295 WARN_ON_ONCE(1); 4296 return; 4297 } 4298 *p++ = cpu_to_be32(op->opnum); 4299 post_err_offset = xdr->buf->len; 4300 4301 if (op->opnum == OP_ILLEGAL) 4302 goto status; 4303 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4304 !nfsd4_enc_ops[op->opnum]); 4305 encoder = nfsd4_enc_ops[op->opnum]; 4306 op->status = encoder(resp, op->status, &op->u); 4307 xdr_commit_encode(xdr); 4308 4309 /* nfsd4_check_resp_size guarantees enough room for error status */ 4310 if (!op->status) { 4311 int space_needed = 0; 4312 if (!nfsd4_last_compound_op(rqstp)) 4313 space_needed = COMPOUND_ERR_SLACK_SPACE; 4314 op->status = nfsd4_check_resp_size(resp, space_needed); 4315 } 4316 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4317 struct nfsd4_slot *slot = resp->cstate.slot; 4318 4319 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4320 op->status = nfserr_rep_too_big_to_cache; 4321 else 4322 op->status = nfserr_rep_too_big; 4323 } 4324 if (op->status == nfserr_resource || 4325 op->status == nfserr_rep_too_big || 4326 op->status == nfserr_rep_too_big_to_cache) { 4327 /* 4328 * The operation may have already been encoded or 4329 * partially encoded. No op returns anything additional 4330 * in the case of one of these three errors, so we can 4331 * just truncate back to after the status. But it's a 4332 * bug if we had to do this on a non-idempotent op: 4333 */ 4334 warn_on_nonidempotent_op(op); 4335 xdr_truncate_encode(xdr, post_err_offset); 4336 } 4337 if (so) { 4338 int len = xdr->buf->len - post_err_offset; 4339 4340 so->so_replay.rp_status = op->status; 4341 so->so_replay.rp_buflen = len; 4342 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4343 so->so_replay.rp_buf, len); 4344 } 4345 status: 4346 /* Note that op->status is already in network byte order: */ 4347 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4348 } 4349 4350 /* 4351 * Encode the reply stored in the stateowner reply cache 4352 * 4353 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4354 * previously sent already encoded operation. 4355 */ 4356 void 4357 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4358 { 4359 __be32 *p; 4360 struct nfs4_replay *rp = op->replay; 4361 4362 BUG_ON(!rp); 4363 4364 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4365 if (!p) { 4366 WARN_ON_ONCE(1); 4367 return; 4368 } 4369 *p++ = cpu_to_be32(op->opnum); 4370 *p++ = rp->rp_status; /* already xdr'ed */ 4371 4372 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4373 } 4374 4375 int 4376 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4377 { 4378 return xdr_ressize_check(rqstp, p); 4379 } 4380 4381 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4382 { 4383 struct svc_rqst *rqstp = rq; 4384 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4385 4386 if (args->ops != args->iops) { 4387 kfree(args->ops); 4388 args->ops = args->iops; 4389 } 4390 kfree(args->tmpp); 4391 args->tmpp = NULL; 4392 while (args->to_free) { 4393 struct svcxdr_tmpbuf *tb = args->to_free; 4394 args->to_free = tb->next; 4395 kfree(tb); 4396 } 4397 return 1; 4398 } 4399 4400 int 4401 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4402 { 4403 if (rqstp->rq_arg.head[0].iov_len % 4) { 4404 /* client is nuts */ 4405 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4406 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4407 return 0; 4408 } 4409 args->p = p; 4410 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4411 args->pagelist = rqstp->rq_arg.pages; 4412 args->pagelen = rqstp->rq_arg.page_len; 4413 args->tmpp = NULL; 4414 args->to_free = NULL; 4415 args->ops = args->iops; 4416 args->rqstp = rqstp; 4417 4418 return !nfsd4_decode_compound(args); 4419 } 4420 4421 int 4422 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4423 { 4424 /* 4425 * All that remains is to write the tag and operation count... 4426 */ 4427 struct xdr_buf *buf = resp->xdr.buf; 4428 4429 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4430 buf->tail[0].iov_len); 4431 4432 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4433 4434 p = resp->tagp; 4435 *p++ = htonl(resp->taglen); 4436 memcpy(p, resp->tag, resp->taglen); 4437 p += XDR_QUADLEN(resp->taglen); 4438 *p++ = htonl(resp->opcnt); 4439 4440 nfsd4_sequence_done(resp); 4441 return 1; 4442 } 4443 4444 /* 4445 * Local variables: 4446 * c-basic-offset: 8 4447 * End: 4448 */ 4449