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 static inline __be32 2144 nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type) 2145 { 2146 __be32 *p; 2147 2148 if (layout_type) { 2149 p = xdr_reserve_space(xdr, 8); 2150 if (!p) 2151 return nfserr_resource; 2152 *p++ = cpu_to_be32(1); 2153 *p++ = cpu_to_be32(layout_type); 2154 } else { 2155 p = xdr_reserve_space(xdr, 4); 2156 if (!p) 2157 return nfserr_resource; 2158 *p++ = cpu_to_be32(0); 2159 } 2160 2161 return 0; 2162 } 2163 2164 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2165 FATTR4_WORD0_RDATTR_ERROR) 2166 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2167 #define WORD2_ABSENT_FS_ATTRS 0 2168 2169 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2170 static inline __be32 2171 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2172 void *context, int len) 2173 { 2174 __be32 *p; 2175 2176 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2177 if (!p) 2178 return nfserr_resource; 2179 2180 /* 2181 * For now we use a 0 here to indicate the null translation; in 2182 * the future we may place a call to translation code here. 2183 */ 2184 *p++ = cpu_to_be32(0); /* lfs */ 2185 *p++ = cpu_to_be32(0); /* pi */ 2186 p = xdr_encode_opaque(p, context, len); 2187 return 0; 2188 } 2189 #else 2190 static inline __be32 2191 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2192 void *context, int len) 2193 { return 0; } 2194 #endif 2195 2196 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2197 { 2198 /* As per referral draft: */ 2199 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2200 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2201 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2202 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2203 *rdattr_err = NFSERR_MOVED; 2204 else 2205 return nfserr_moved; 2206 } 2207 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2208 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2209 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2210 return 0; 2211 } 2212 2213 2214 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2215 { 2216 struct path path = exp->ex_path; 2217 int err; 2218 2219 path_get(&path); 2220 while (follow_up(&path)) { 2221 if (path.dentry != path.mnt->mnt_root) 2222 break; 2223 } 2224 err = vfs_getattr(&path, stat); 2225 path_put(&path); 2226 return err; 2227 } 2228 2229 static __be32 2230 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2231 { 2232 __be32 *p; 2233 2234 if (bmval2) { 2235 p = xdr_reserve_space(xdr, 16); 2236 if (!p) 2237 goto out_resource; 2238 *p++ = cpu_to_be32(3); 2239 *p++ = cpu_to_be32(bmval0); 2240 *p++ = cpu_to_be32(bmval1); 2241 *p++ = cpu_to_be32(bmval2); 2242 } else if (bmval1) { 2243 p = xdr_reserve_space(xdr, 12); 2244 if (!p) 2245 goto out_resource; 2246 *p++ = cpu_to_be32(2); 2247 *p++ = cpu_to_be32(bmval0); 2248 *p++ = cpu_to_be32(bmval1); 2249 } else { 2250 p = xdr_reserve_space(xdr, 8); 2251 if (!p) 2252 goto out_resource; 2253 *p++ = cpu_to_be32(1); 2254 *p++ = cpu_to_be32(bmval0); 2255 } 2256 2257 return 0; 2258 out_resource: 2259 return nfserr_resource; 2260 } 2261 2262 /* 2263 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2264 * ourselves. 2265 */ 2266 static __be32 2267 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2268 struct svc_export *exp, 2269 struct dentry *dentry, u32 *bmval, 2270 struct svc_rqst *rqstp, int ignore_crossmnt) 2271 { 2272 u32 bmval0 = bmval[0]; 2273 u32 bmval1 = bmval[1]; 2274 u32 bmval2 = bmval[2]; 2275 struct kstat stat; 2276 struct svc_fh *tempfh = NULL; 2277 struct kstatfs statfs; 2278 __be32 *p; 2279 int starting_len = xdr->buf->len; 2280 int attrlen_offset; 2281 __be32 attrlen; 2282 u32 dummy; 2283 u64 dummy64; 2284 u32 rdattr_err = 0; 2285 __be32 status; 2286 int err; 2287 struct nfs4_acl *acl = NULL; 2288 void *context = NULL; 2289 int contextlen; 2290 bool contextsupport = false; 2291 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2292 u32 minorversion = resp->cstate.minorversion; 2293 struct path path = { 2294 .mnt = exp->ex_path.mnt, 2295 .dentry = dentry, 2296 }; 2297 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2298 2299 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2300 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2301 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2302 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2303 2304 if (exp->ex_fslocs.migrated) { 2305 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2306 if (status) 2307 goto out; 2308 } 2309 2310 err = vfs_getattr(&path, &stat); 2311 if (err) 2312 goto out_nfserr; 2313 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2314 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2315 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2316 FATTR4_WORD1_SPACE_TOTAL))) { 2317 err = vfs_statfs(&path, &statfs); 2318 if (err) 2319 goto out_nfserr; 2320 } 2321 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2322 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2323 status = nfserr_jukebox; 2324 if (!tempfh) 2325 goto out; 2326 fh_init(tempfh, NFS4_FHSIZE); 2327 status = fh_compose(tempfh, exp, dentry, NULL); 2328 if (status) 2329 goto out; 2330 fhp = tempfh; 2331 } 2332 if (bmval0 & FATTR4_WORD0_ACL) { 2333 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2334 if (err == -EOPNOTSUPP) 2335 bmval0 &= ~FATTR4_WORD0_ACL; 2336 else if (err == -EINVAL) { 2337 status = nfserr_attrnotsupp; 2338 goto out; 2339 } else if (err != 0) 2340 goto out_nfserr; 2341 } 2342 2343 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2344 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2345 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2346 err = security_inode_getsecctx(d_inode(dentry), 2347 &context, &contextlen); 2348 contextsupport = (err == 0); 2349 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2350 if (err == -EOPNOTSUPP) 2351 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2352 else if (err) 2353 goto out_nfserr; 2354 } 2355 } 2356 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2357 2358 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2359 if (status) 2360 goto out; 2361 2362 attrlen_offset = xdr->buf->len; 2363 p = xdr_reserve_space(xdr, 4); 2364 if (!p) 2365 goto out_resource; 2366 p++; /* to be backfilled later */ 2367 2368 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2369 u32 word0 = nfsd_suppattrs0(minorversion); 2370 u32 word1 = nfsd_suppattrs1(minorversion); 2371 u32 word2 = nfsd_suppattrs2(minorversion); 2372 2373 if (!IS_POSIXACL(dentry->d_inode)) 2374 word0 &= ~FATTR4_WORD0_ACL; 2375 if (!contextsupport) 2376 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2377 if (!word2) { 2378 p = xdr_reserve_space(xdr, 12); 2379 if (!p) 2380 goto out_resource; 2381 *p++ = cpu_to_be32(2); 2382 *p++ = cpu_to_be32(word0); 2383 *p++ = cpu_to_be32(word1); 2384 } else { 2385 p = xdr_reserve_space(xdr, 16); 2386 if (!p) 2387 goto out_resource; 2388 *p++ = cpu_to_be32(3); 2389 *p++ = cpu_to_be32(word0); 2390 *p++ = cpu_to_be32(word1); 2391 *p++ = cpu_to_be32(word2); 2392 } 2393 } 2394 if (bmval0 & FATTR4_WORD0_TYPE) { 2395 p = xdr_reserve_space(xdr, 4); 2396 if (!p) 2397 goto out_resource; 2398 dummy = nfs4_file_type(stat.mode); 2399 if (dummy == NF4BAD) { 2400 status = nfserr_serverfault; 2401 goto out; 2402 } 2403 *p++ = cpu_to_be32(dummy); 2404 } 2405 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2406 p = xdr_reserve_space(xdr, 4); 2407 if (!p) 2408 goto out_resource; 2409 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2410 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2411 else 2412 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2413 NFS4_FH_VOL_RENAME); 2414 } 2415 if (bmval0 & FATTR4_WORD0_CHANGE) { 2416 p = xdr_reserve_space(xdr, 8); 2417 if (!p) 2418 goto out_resource; 2419 p = encode_change(p, &stat, d_inode(dentry)); 2420 } 2421 if (bmval0 & FATTR4_WORD0_SIZE) { 2422 p = xdr_reserve_space(xdr, 8); 2423 if (!p) 2424 goto out_resource; 2425 p = xdr_encode_hyper(p, stat.size); 2426 } 2427 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2428 p = xdr_reserve_space(xdr, 4); 2429 if (!p) 2430 goto out_resource; 2431 *p++ = cpu_to_be32(1); 2432 } 2433 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2434 p = xdr_reserve_space(xdr, 4); 2435 if (!p) 2436 goto out_resource; 2437 *p++ = cpu_to_be32(1); 2438 } 2439 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2440 p = xdr_reserve_space(xdr, 4); 2441 if (!p) 2442 goto out_resource; 2443 *p++ = cpu_to_be32(0); 2444 } 2445 if (bmval0 & FATTR4_WORD0_FSID) { 2446 p = xdr_reserve_space(xdr, 16); 2447 if (!p) 2448 goto out_resource; 2449 if (exp->ex_fslocs.migrated) { 2450 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2451 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2452 } else switch(fsid_source(fhp)) { 2453 case FSIDSOURCE_FSID: 2454 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2455 p = xdr_encode_hyper(p, (u64)0); 2456 break; 2457 case FSIDSOURCE_DEV: 2458 *p++ = cpu_to_be32(0); 2459 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2460 *p++ = cpu_to_be32(0); 2461 *p++ = cpu_to_be32(MINOR(stat.dev)); 2462 break; 2463 case FSIDSOURCE_UUID: 2464 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2465 EX_UUID_LEN); 2466 break; 2467 } 2468 } 2469 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2470 p = xdr_reserve_space(xdr, 4); 2471 if (!p) 2472 goto out_resource; 2473 *p++ = cpu_to_be32(0); 2474 } 2475 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2476 p = xdr_reserve_space(xdr, 4); 2477 if (!p) 2478 goto out_resource; 2479 *p++ = cpu_to_be32(nn->nfsd4_lease); 2480 } 2481 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2482 p = xdr_reserve_space(xdr, 4); 2483 if (!p) 2484 goto out_resource; 2485 *p++ = cpu_to_be32(rdattr_err); 2486 } 2487 if (bmval0 & FATTR4_WORD0_ACL) { 2488 struct nfs4_ace *ace; 2489 2490 if (acl == NULL) { 2491 p = xdr_reserve_space(xdr, 4); 2492 if (!p) 2493 goto out_resource; 2494 2495 *p++ = cpu_to_be32(0); 2496 goto out_acl; 2497 } 2498 p = xdr_reserve_space(xdr, 4); 2499 if (!p) 2500 goto out_resource; 2501 *p++ = cpu_to_be32(acl->naces); 2502 2503 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2504 p = xdr_reserve_space(xdr, 4*3); 2505 if (!p) 2506 goto out_resource; 2507 *p++ = cpu_to_be32(ace->type); 2508 *p++ = cpu_to_be32(ace->flag); 2509 *p++ = cpu_to_be32(ace->access_mask & 2510 NFS4_ACE_MASK_ALL); 2511 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2512 if (status) 2513 goto out; 2514 } 2515 } 2516 out_acl: 2517 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2518 p = xdr_reserve_space(xdr, 4); 2519 if (!p) 2520 goto out_resource; 2521 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2522 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2523 } 2524 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2525 p = xdr_reserve_space(xdr, 4); 2526 if (!p) 2527 goto out_resource; 2528 *p++ = cpu_to_be32(1); 2529 } 2530 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2531 p = xdr_reserve_space(xdr, 4); 2532 if (!p) 2533 goto out_resource; 2534 *p++ = cpu_to_be32(0); 2535 } 2536 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2537 p = xdr_reserve_space(xdr, 4); 2538 if (!p) 2539 goto out_resource; 2540 *p++ = cpu_to_be32(1); 2541 } 2542 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2543 p = xdr_reserve_space(xdr, 4); 2544 if (!p) 2545 goto out_resource; 2546 *p++ = cpu_to_be32(1); 2547 } 2548 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2549 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2550 if (!p) 2551 goto out_resource; 2552 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2553 fhp->fh_handle.fh_size); 2554 } 2555 if (bmval0 & FATTR4_WORD0_FILEID) { 2556 p = xdr_reserve_space(xdr, 8); 2557 if (!p) 2558 goto out_resource; 2559 p = xdr_encode_hyper(p, stat.ino); 2560 } 2561 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2562 p = xdr_reserve_space(xdr, 8); 2563 if (!p) 2564 goto out_resource; 2565 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2566 } 2567 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2568 p = xdr_reserve_space(xdr, 8); 2569 if (!p) 2570 goto out_resource; 2571 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2572 } 2573 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2574 p = xdr_reserve_space(xdr, 8); 2575 if (!p) 2576 goto out_resource; 2577 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2578 } 2579 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2580 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2581 if (status) 2582 goto out; 2583 } 2584 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2585 p = xdr_reserve_space(xdr, 4); 2586 if (!p) 2587 goto out_resource; 2588 *p++ = cpu_to_be32(1); 2589 } 2590 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2591 p = xdr_reserve_space(xdr, 8); 2592 if (!p) 2593 goto out_resource; 2594 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2595 } 2596 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2597 p = xdr_reserve_space(xdr, 4); 2598 if (!p) 2599 goto out_resource; 2600 *p++ = cpu_to_be32(255); 2601 } 2602 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2603 p = xdr_reserve_space(xdr, 4); 2604 if (!p) 2605 goto out_resource; 2606 *p++ = cpu_to_be32(statfs.f_namelen); 2607 } 2608 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2609 p = xdr_reserve_space(xdr, 8); 2610 if (!p) 2611 goto out_resource; 2612 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2613 } 2614 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2615 p = xdr_reserve_space(xdr, 8); 2616 if (!p) 2617 goto out_resource; 2618 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2619 } 2620 if (bmval1 & FATTR4_WORD1_MODE) { 2621 p = xdr_reserve_space(xdr, 4); 2622 if (!p) 2623 goto out_resource; 2624 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2625 } 2626 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2627 p = xdr_reserve_space(xdr, 4); 2628 if (!p) 2629 goto out_resource; 2630 *p++ = cpu_to_be32(1); 2631 } 2632 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2633 p = xdr_reserve_space(xdr, 4); 2634 if (!p) 2635 goto out_resource; 2636 *p++ = cpu_to_be32(stat.nlink); 2637 } 2638 if (bmval1 & FATTR4_WORD1_OWNER) { 2639 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2640 if (status) 2641 goto out; 2642 } 2643 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2644 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2645 if (status) 2646 goto out; 2647 } 2648 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2649 p = xdr_reserve_space(xdr, 8); 2650 if (!p) 2651 goto out_resource; 2652 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2653 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2654 } 2655 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2656 p = xdr_reserve_space(xdr, 8); 2657 if (!p) 2658 goto out_resource; 2659 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2660 p = xdr_encode_hyper(p, dummy64); 2661 } 2662 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2663 p = xdr_reserve_space(xdr, 8); 2664 if (!p) 2665 goto out_resource; 2666 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2667 p = xdr_encode_hyper(p, dummy64); 2668 } 2669 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2670 p = xdr_reserve_space(xdr, 8); 2671 if (!p) 2672 goto out_resource; 2673 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2674 p = xdr_encode_hyper(p, dummy64); 2675 } 2676 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2677 p = xdr_reserve_space(xdr, 8); 2678 if (!p) 2679 goto out_resource; 2680 dummy64 = (u64)stat.blocks << 9; 2681 p = xdr_encode_hyper(p, dummy64); 2682 } 2683 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2684 p = xdr_reserve_space(xdr, 12); 2685 if (!p) 2686 goto out_resource; 2687 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2688 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2689 } 2690 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2691 p = xdr_reserve_space(xdr, 12); 2692 if (!p) 2693 goto out_resource; 2694 *p++ = cpu_to_be32(0); 2695 *p++ = cpu_to_be32(1); 2696 *p++ = cpu_to_be32(0); 2697 } 2698 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2699 p = xdr_reserve_space(xdr, 12); 2700 if (!p) 2701 goto out_resource; 2702 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2703 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2704 } 2705 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2706 p = xdr_reserve_space(xdr, 12); 2707 if (!p) 2708 goto out_resource; 2709 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2710 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2711 } 2712 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2713 struct kstat parent_stat; 2714 u64 ino = stat.ino; 2715 2716 p = xdr_reserve_space(xdr, 8); 2717 if (!p) 2718 goto out_resource; 2719 /* 2720 * Get parent's attributes if not ignoring crossmount 2721 * and this is the root of a cross-mounted filesystem. 2722 */ 2723 if (ignore_crossmnt == 0 && 2724 dentry == exp->ex_path.mnt->mnt_root) { 2725 err = get_parent_attributes(exp, &parent_stat); 2726 if (err) 2727 goto out_nfserr; 2728 ino = parent_stat.ino; 2729 } 2730 p = xdr_encode_hyper(p, ino); 2731 } 2732 #ifdef CONFIG_NFSD_PNFS 2733 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2734 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type); 2735 if (status) 2736 goto out; 2737 } 2738 2739 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2740 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type); 2741 if (status) 2742 goto out; 2743 } 2744 2745 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2746 p = xdr_reserve_space(xdr, 4); 2747 if (!p) 2748 goto out_resource; 2749 *p++ = cpu_to_be32(stat.blksize); 2750 } 2751 #endif /* CONFIG_NFSD_PNFS */ 2752 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2753 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0, 2754 NFSD_SUPPATTR_EXCLCREAT_WORD1, 2755 NFSD_SUPPATTR_EXCLCREAT_WORD2); 2756 if (status) 2757 goto out; 2758 } 2759 2760 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2761 status = nfsd4_encode_security_label(xdr, rqstp, context, 2762 contextlen); 2763 if (status) 2764 goto out; 2765 } 2766 2767 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2768 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2769 status = nfs_ok; 2770 2771 out: 2772 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2773 if (context) 2774 security_release_secctx(context, contextlen); 2775 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2776 kfree(acl); 2777 if (tempfh) { 2778 fh_put(tempfh); 2779 kfree(tempfh); 2780 } 2781 if (status) 2782 xdr_truncate_encode(xdr, starting_len); 2783 return status; 2784 out_nfserr: 2785 status = nfserrno(err); 2786 goto out; 2787 out_resource: 2788 status = nfserr_resource; 2789 goto out; 2790 } 2791 2792 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2793 struct xdr_buf *buf, __be32 *p, int bytes) 2794 { 2795 xdr->scratch.iov_len = 0; 2796 memset(buf, 0, sizeof(struct xdr_buf)); 2797 buf->head[0].iov_base = p; 2798 buf->head[0].iov_len = 0; 2799 buf->len = 0; 2800 xdr->buf = buf; 2801 xdr->iov = buf->head; 2802 xdr->p = p; 2803 xdr->end = (void *)p + bytes; 2804 buf->buflen = bytes; 2805 } 2806 2807 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2808 struct svc_fh *fhp, struct svc_export *exp, 2809 struct dentry *dentry, u32 *bmval, 2810 struct svc_rqst *rqstp, int ignore_crossmnt) 2811 { 2812 struct xdr_buf dummy; 2813 struct xdr_stream xdr; 2814 __be32 ret; 2815 2816 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2817 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2818 ignore_crossmnt); 2819 *p = xdr.p; 2820 return ret; 2821 } 2822 2823 static inline int attributes_need_mount(u32 *bmval) 2824 { 2825 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2826 return 1; 2827 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2828 return 1; 2829 return 0; 2830 } 2831 2832 static __be32 2833 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2834 const char *name, int namlen) 2835 { 2836 struct svc_export *exp = cd->rd_fhp->fh_export; 2837 struct dentry *dentry; 2838 __be32 nfserr; 2839 int ignore_crossmnt = 0; 2840 2841 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2842 if (IS_ERR(dentry)) 2843 return nfserrno(PTR_ERR(dentry)); 2844 if (d_really_is_negative(dentry)) { 2845 /* 2846 * nfsd_buffered_readdir drops the i_mutex between 2847 * readdir and calling this callback, leaving a window 2848 * where this directory entry could have gone away. 2849 */ 2850 dput(dentry); 2851 return nfserr_noent; 2852 } 2853 2854 exp_get(exp); 2855 /* 2856 * In the case of a mountpoint, the client may be asking for 2857 * attributes that are only properties of the underlying filesystem 2858 * as opposed to the cross-mounted file system. In such a case, 2859 * we will not follow the cross mount and will fill the attribtutes 2860 * directly from the mountpoint dentry. 2861 */ 2862 if (nfsd_mountpoint(dentry, exp)) { 2863 int err; 2864 2865 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2866 && !attributes_need_mount(cd->rd_bmval)) { 2867 ignore_crossmnt = 1; 2868 goto out_encode; 2869 } 2870 /* 2871 * Why the heck aren't we just using nfsd_lookup?? 2872 * Different "."/".." handling? Something else? 2873 * At least, add a comment here to explain.... 2874 */ 2875 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2876 if (err) { 2877 nfserr = nfserrno(err); 2878 goto out_put; 2879 } 2880 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2881 if (nfserr) 2882 goto out_put; 2883 2884 } 2885 out_encode: 2886 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2887 cd->rd_rqstp, ignore_crossmnt); 2888 out_put: 2889 dput(dentry); 2890 exp_put(exp); 2891 return nfserr; 2892 } 2893 2894 static __be32 * 2895 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2896 { 2897 __be32 *p; 2898 2899 p = xdr_reserve_space(xdr, 20); 2900 if (!p) 2901 return NULL; 2902 *p++ = htonl(2); 2903 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2904 *p++ = htonl(0); /* bmval1 */ 2905 2906 *p++ = htonl(4); /* attribute length */ 2907 *p++ = nfserr; /* no htonl */ 2908 return p; 2909 } 2910 2911 static int 2912 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2913 loff_t offset, u64 ino, unsigned int d_type) 2914 { 2915 struct readdir_cd *ccd = ccdv; 2916 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2917 struct xdr_stream *xdr = cd->xdr; 2918 int start_offset = xdr->buf->len; 2919 int cookie_offset; 2920 u32 name_and_cookie; 2921 int entry_bytes; 2922 __be32 nfserr = nfserr_toosmall; 2923 __be64 wire_offset; 2924 __be32 *p; 2925 2926 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2927 if (name && isdotent(name, namlen)) { 2928 cd->common.err = nfs_ok; 2929 return 0; 2930 } 2931 2932 if (cd->cookie_offset) { 2933 wire_offset = cpu_to_be64(offset); 2934 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2935 &wire_offset, 8); 2936 } 2937 2938 p = xdr_reserve_space(xdr, 4); 2939 if (!p) 2940 goto fail; 2941 *p++ = xdr_one; /* mark entry present */ 2942 cookie_offset = xdr->buf->len; 2943 p = xdr_reserve_space(xdr, 3*4 + namlen); 2944 if (!p) 2945 goto fail; 2946 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2947 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2948 2949 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2950 switch (nfserr) { 2951 case nfs_ok: 2952 break; 2953 case nfserr_resource: 2954 nfserr = nfserr_toosmall; 2955 goto fail; 2956 case nfserr_noent: 2957 xdr_truncate_encode(xdr, start_offset); 2958 goto skip_entry; 2959 default: 2960 /* 2961 * If the client requested the RDATTR_ERROR attribute, 2962 * we stuff the error code into this attribute 2963 * and continue. If this attribute was not requested, 2964 * then in accordance with the spec, we fail the 2965 * entire READDIR operation(!) 2966 */ 2967 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2968 goto fail; 2969 p = nfsd4_encode_rdattr_error(xdr, nfserr); 2970 if (p == NULL) { 2971 nfserr = nfserr_toosmall; 2972 goto fail; 2973 } 2974 } 2975 nfserr = nfserr_toosmall; 2976 entry_bytes = xdr->buf->len - start_offset; 2977 if (entry_bytes > cd->rd_maxcount) 2978 goto fail; 2979 cd->rd_maxcount -= entry_bytes; 2980 /* 2981 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 2982 * let's always let through the first entry, at least: 2983 */ 2984 if (!cd->rd_dircount) 2985 goto fail; 2986 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 2987 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 2988 goto fail; 2989 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 2990 2991 cd->cookie_offset = cookie_offset; 2992 skip_entry: 2993 cd->common.err = nfs_ok; 2994 return 0; 2995 fail: 2996 xdr_truncate_encode(xdr, start_offset); 2997 cd->common.err = nfserr; 2998 return -EINVAL; 2999 } 3000 3001 static __be32 3002 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3003 { 3004 __be32 *p; 3005 3006 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3007 if (!p) 3008 return nfserr_resource; 3009 *p++ = cpu_to_be32(sid->si_generation); 3010 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3011 sizeof(stateid_opaque_t)); 3012 return 0; 3013 } 3014 3015 static __be32 3016 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3017 { 3018 struct xdr_stream *xdr = &resp->xdr; 3019 __be32 *p; 3020 3021 if (!nfserr) { 3022 p = xdr_reserve_space(xdr, 8); 3023 if (!p) 3024 return nfserr_resource; 3025 *p++ = cpu_to_be32(access->ac_supported); 3026 *p++ = cpu_to_be32(access->ac_resp_access); 3027 } 3028 return nfserr; 3029 } 3030 3031 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3032 { 3033 struct xdr_stream *xdr = &resp->xdr; 3034 __be32 *p; 3035 3036 if (!nfserr) { 3037 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3038 if (!p) 3039 return nfserr_resource; 3040 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3041 NFS4_MAX_SESSIONID_LEN); 3042 *p++ = cpu_to_be32(bcts->dir); 3043 /* Sorry, we do not yet support RDMA over 4.1: */ 3044 *p++ = cpu_to_be32(0); 3045 } 3046 return nfserr; 3047 } 3048 3049 static __be32 3050 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3051 { 3052 struct xdr_stream *xdr = &resp->xdr; 3053 3054 if (!nfserr) 3055 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3056 3057 return nfserr; 3058 } 3059 3060 3061 static __be32 3062 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3063 { 3064 struct xdr_stream *xdr = &resp->xdr; 3065 __be32 *p; 3066 3067 if (!nfserr) { 3068 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3069 if (!p) 3070 return nfserr_resource; 3071 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3072 NFS4_VERIFIER_SIZE); 3073 } 3074 return nfserr; 3075 } 3076 3077 static __be32 3078 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3079 { 3080 struct xdr_stream *xdr = &resp->xdr; 3081 __be32 *p; 3082 3083 if (!nfserr) { 3084 p = xdr_reserve_space(xdr, 20); 3085 if (!p) 3086 return nfserr_resource; 3087 encode_cinfo(p, &create->cr_cinfo); 3088 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3089 create->cr_bmval[1], create->cr_bmval[2]); 3090 } 3091 return nfserr; 3092 } 3093 3094 static __be32 3095 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3096 { 3097 struct svc_fh *fhp = getattr->ga_fhp; 3098 struct xdr_stream *xdr = &resp->xdr; 3099 3100 if (nfserr) 3101 return nfserr; 3102 3103 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3104 getattr->ga_bmval, 3105 resp->rqstp, 0); 3106 return nfserr; 3107 } 3108 3109 static __be32 3110 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3111 { 3112 struct xdr_stream *xdr = &resp->xdr; 3113 struct svc_fh *fhp = *fhpp; 3114 unsigned int len; 3115 __be32 *p; 3116 3117 if (!nfserr) { 3118 len = fhp->fh_handle.fh_size; 3119 p = xdr_reserve_space(xdr, len + 4); 3120 if (!p) 3121 return nfserr_resource; 3122 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3123 } 3124 return nfserr; 3125 } 3126 3127 /* 3128 * Including all fields other than the name, a LOCK4denied structure requires 3129 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3130 */ 3131 static __be32 3132 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3133 { 3134 struct xdr_netobj *conf = &ld->ld_owner; 3135 __be32 *p; 3136 3137 again: 3138 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3139 if (!p) { 3140 /* 3141 * Don't fail to return the result just because we can't 3142 * return the conflicting open: 3143 */ 3144 if (conf->len) { 3145 kfree(conf->data); 3146 conf->len = 0; 3147 conf->data = NULL; 3148 goto again; 3149 } 3150 return nfserr_resource; 3151 } 3152 p = xdr_encode_hyper(p, ld->ld_start); 3153 p = xdr_encode_hyper(p, ld->ld_length); 3154 *p++ = cpu_to_be32(ld->ld_type); 3155 if (conf->len) { 3156 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3157 p = xdr_encode_opaque(p, conf->data, conf->len); 3158 kfree(conf->data); 3159 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3160 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3161 *p++ = cpu_to_be32(0); /* length of owner name */ 3162 } 3163 return nfserr_denied; 3164 } 3165 3166 static __be32 3167 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3168 { 3169 struct xdr_stream *xdr = &resp->xdr; 3170 3171 if (!nfserr) 3172 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3173 else if (nfserr == nfserr_denied) 3174 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3175 3176 return nfserr; 3177 } 3178 3179 static __be32 3180 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3181 { 3182 struct xdr_stream *xdr = &resp->xdr; 3183 3184 if (nfserr == nfserr_denied) 3185 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3186 return nfserr; 3187 } 3188 3189 static __be32 3190 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3191 { 3192 struct xdr_stream *xdr = &resp->xdr; 3193 3194 if (!nfserr) 3195 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3196 3197 return nfserr; 3198 } 3199 3200 3201 static __be32 3202 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3203 { 3204 struct xdr_stream *xdr = &resp->xdr; 3205 __be32 *p; 3206 3207 if (!nfserr) { 3208 p = xdr_reserve_space(xdr, 20); 3209 if (!p) 3210 return nfserr_resource; 3211 p = encode_cinfo(p, &link->li_cinfo); 3212 } 3213 return nfserr; 3214 } 3215 3216 3217 static __be32 3218 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3219 { 3220 struct xdr_stream *xdr = &resp->xdr; 3221 __be32 *p; 3222 3223 if (nfserr) 3224 goto out; 3225 3226 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3227 if (nfserr) 3228 goto out; 3229 p = xdr_reserve_space(xdr, 24); 3230 if (!p) 3231 return nfserr_resource; 3232 p = encode_cinfo(p, &open->op_cinfo); 3233 *p++ = cpu_to_be32(open->op_rflags); 3234 3235 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3236 open->op_bmval[2]); 3237 if (nfserr) 3238 goto out; 3239 3240 p = xdr_reserve_space(xdr, 4); 3241 if (!p) 3242 return nfserr_resource; 3243 3244 *p++ = cpu_to_be32(open->op_delegate_type); 3245 switch (open->op_delegate_type) { 3246 case NFS4_OPEN_DELEGATE_NONE: 3247 break; 3248 case NFS4_OPEN_DELEGATE_READ: 3249 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3250 if (nfserr) 3251 return nfserr; 3252 p = xdr_reserve_space(xdr, 20); 3253 if (!p) 3254 return nfserr_resource; 3255 *p++ = cpu_to_be32(open->op_recall); 3256 3257 /* 3258 * TODO: ACE's in delegations 3259 */ 3260 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3261 *p++ = cpu_to_be32(0); 3262 *p++ = cpu_to_be32(0); 3263 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3264 break; 3265 case NFS4_OPEN_DELEGATE_WRITE: 3266 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3267 if (nfserr) 3268 return nfserr; 3269 p = xdr_reserve_space(xdr, 32); 3270 if (!p) 3271 return nfserr_resource; 3272 *p++ = cpu_to_be32(0); 3273 3274 /* 3275 * TODO: space_limit's in delegations 3276 */ 3277 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3278 *p++ = cpu_to_be32(~(u32)0); 3279 *p++ = cpu_to_be32(~(u32)0); 3280 3281 /* 3282 * TODO: ACE's in delegations 3283 */ 3284 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3285 *p++ = cpu_to_be32(0); 3286 *p++ = cpu_to_be32(0); 3287 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3288 break; 3289 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3290 switch (open->op_why_no_deleg) { 3291 case WND4_CONTENTION: 3292 case WND4_RESOURCE: 3293 p = xdr_reserve_space(xdr, 8); 3294 if (!p) 3295 return nfserr_resource; 3296 *p++ = cpu_to_be32(open->op_why_no_deleg); 3297 /* deleg signaling not supported yet: */ 3298 *p++ = cpu_to_be32(0); 3299 break; 3300 default: 3301 p = xdr_reserve_space(xdr, 4); 3302 if (!p) 3303 return nfserr_resource; 3304 *p++ = cpu_to_be32(open->op_why_no_deleg); 3305 } 3306 break; 3307 default: 3308 BUG(); 3309 } 3310 /* XXX save filehandle here */ 3311 out: 3312 return nfserr; 3313 } 3314 3315 static __be32 3316 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3317 { 3318 struct xdr_stream *xdr = &resp->xdr; 3319 3320 if (!nfserr) 3321 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3322 3323 return nfserr; 3324 } 3325 3326 static __be32 3327 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3328 { 3329 struct xdr_stream *xdr = &resp->xdr; 3330 3331 if (!nfserr) 3332 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3333 3334 return nfserr; 3335 } 3336 3337 static __be32 nfsd4_encode_splice_read( 3338 struct nfsd4_compoundres *resp, 3339 struct nfsd4_read *read, 3340 struct file *file, unsigned long maxcount) 3341 { 3342 struct xdr_stream *xdr = &resp->xdr; 3343 struct xdr_buf *buf = xdr->buf; 3344 u32 eof; 3345 int space_left; 3346 __be32 nfserr; 3347 __be32 *p = xdr->p - 2; 3348 3349 /* Make sure there will be room for padding if needed */ 3350 if (xdr->end - xdr->p < 1) 3351 return nfserr_resource; 3352 3353 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3354 read->rd_offset, &maxcount); 3355 if (nfserr) { 3356 /* 3357 * nfsd_splice_actor may have already messed with the 3358 * page length; reset it so as not to confuse 3359 * xdr_truncate_encode: 3360 */ 3361 buf->page_len = 0; 3362 return nfserr; 3363 } 3364 3365 eof = (read->rd_offset + maxcount >= 3366 d_inode(read->rd_fhp->fh_dentry)->i_size); 3367 3368 *(p++) = htonl(eof); 3369 *(p++) = htonl(maxcount); 3370 3371 buf->page_len = maxcount; 3372 buf->len += maxcount; 3373 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3374 / PAGE_SIZE; 3375 3376 /* Use rest of head for padding and remaining ops: */ 3377 buf->tail[0].iov_base = xdr->p; 3378 buf->tail[0].iov_len = 0; 3379 xdr->iov = buf->tail; 3380 if (maxcount&3) { 3381 int pad = 4 - (maxcount&3); 3382 3383 *(xdr->p++) = 0; 3384 3385 buf->tail[0].iov_base += maxcount&3; 3386 buf->tail[0].iov_len = pad; 3387 buf->len += pad; 3388 } 3389 3390 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3391 buf->buflen - buf->len); 3392 buf->buflen = buf->len + space_left; 3393 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3394 3395 return 0; 3396 } 3397 3398 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3399 struct nfsd4_read *read, 3400 struct file *file, unsigned long maxcount) 3401 { 3402 struct xdr_stream *xdr = &resp->xdr; 3403 u32 eof; 3404 int v; 3405 int starting_len = xdr->buf->len - 8; 3406 long len; 3407 int thislen; 3408 __be32 nfserr; 3409 __be32 tmp; 3410 __be32 *p; 3411 u32 zzz = 0; 3412 int pad; 3413 3414 len = maxcount; 3415 v = 0; 3416 3417 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3418 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3419 WARN_ON_ONCE(!p); 3420 resp->rqstp->rq_vec[v].iov_base = p; 3421 resp->rqstp->rq_vec[v].iov_len = thislen; 3422 v++; 3423 len -= thislen; 3424 3425 while (len) { 3426 thislen = min_t(long, len, PAGE_SIZE); 3427 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3428 WARN_ON_ONCE(!p); 3429 resp->rqstp->rq_vec[v].iov_base = p; 3430 resp->rqstp->rq_vec[v].iov_len = thislen; 3431 v++; 3432 len -= thislen; 3433 } 3434 read->rd_vlen = v; 3435 3436 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3437 read->rd_vlen, &maxcount); 3438 if (nfserr) 3439 return nfserr; 3440 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3441 3442 eof = (read->rd_offset + maxcount >= 3443 d_inode(read->rd_fhp->fh_dentry)->i_size); 3444 3445 tmp = htonl(eof); 3446 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3447 tmp = htonl(maxcount); 3448 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3449 3450 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3451 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3452 &zzz, pad); 3453 return 0; 3454 3455 } 3456 3457 static __be32 3458 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3459 struct nfsd4_read *read) 3460 { 3461 unsigned long maxcount; 3462 struct xdr_stream *xdr = &resp->xdr; 3463 struct file *file = read->rd_filp; 3464 int starting_len = xdr->buf->len; 3465 struct raparms *ra = NULL; 3466 __be32 *p; 3467 3468 if (nfserr) 3469 goto out; 3470 3471 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3472 if (!p) { 3473 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3474 nfserr = nfserr_resource; 3475 goto out; 3476 } 3477 if (resp->xdr.buf->page_len && 3478 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3479 WARN_ON_ONCE(1); 3480 nfserr = nfserr_resource; 3481 goto out; 3482 } 3483 xdr_commit_encode(xdr); 3484 3485 maxcount = svc_max_payload(resp->rqstp); 3486 maxcount = min_t(unsigned long, maxcount, 3487 (xdr->buf->buflen - xdr->buf->len)); 3488 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3489 3490 if (read->rd_tmp_file) 3491 ra = nfsd_init_raparms(file); 3492 3493 if (file->f_op->splice_read && 3494 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3495 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3496 else 3497 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3498 3499 if (ra) 3500 nfsd_put_raparams(file, ra); 3501 3502 if (nfserr) 3503 xdr_truncate_encode(xdr, starting_len); 3504 3505 out: 3506 if (file) 3507 fput(file); 3508 return nfserr; 3509 } 3510 3511 static __be32 3512 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3513 { 3514 int maxcount; 3515 __be32 wire_count; 3516 int zero = 0; 3517 struct xdr_stream *xdr = &resp->xdr; 3518 int length_offset = xdr->buf->len; 3519 __be32 *p; 3520 3521 if (nfserr) 3522 return nfserr; 3523 3524 p = xdr_reserve_space(xdr, 4); 3525 if (!p) 3526 return nfserr_resource; 3527 maxcount = PAGE_SIZE; 3528 3529 p = xdr_reserve_space(xdr, maxcount); 3530 if (!p) 3531 return nfserr_resource; 3532 /* 3533 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3534 * if they would overflow the buffer. Is this kosher in NFSv4? If 3535 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3536 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3537 */ 3538 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3539 (char *)p, &maxcount); 3540 if (nfserr == nfserr_isdir) 3541 nfserr = nfserr_inval; 3542 if (nfserr) { 3543 xdr_truncate_encode(xdr, length_offset); 3544 return nfserr; 3545 } 3546 3547 wire_count = htonl(maxcount); 3548 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3549 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3550 if (maxcount & 3) 3551 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3552 &zero, 4 - (maxcount&3)); 3553 return 0; 3554 } 3555 3556 static __be32 3557 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3558 { 3559 int maxcount; 3560 int bytes_left; 3561 loff_t offset; 3562 __be64 wire_offset; 3563 struct xdr_stream *xdr = &resp->xdr; 3564 int starting_len = xdr->buf->len; 3565 __be32 *p; 3566 3567 if (nfserr) 3568 return nfserr; 3569 3570 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3571 if (!p) 3572 return nfserr_resource; 3573 3574 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3575 *p++ = cpu_to_be32(0); 3576 *p++ = cpu_to_be32(0); 3577 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3578 - (char *)resp->xdr.buf->head[0].iov_base; 3579 3580 /* 3581 * Number of bytes left for directory entries allowing for the 3582 * final 8 bytes of the readdir and a following failed op: 3583 */ 3584 bytes_left = xdr->buf->buflen - xdr->buf->len 3585 - COMPOUND_ERR_SLACK_SPACE - 8; 3586 if (bytes_left < 0) { 3587 nfserr = nfserr_resource; 3588 goto err_no_verf; 3589 } 3590 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3591 /* 3592 * Note the rfc defines rd_maxcount as the size of the 3593 * READDIR4resok structure, which includes the verifier above 3594 * and the 8 bytes encoded at the end of this function: 3595 */ 3596 if (maxcount < 16) { 3597 nfserr = nfserr_toosmall; 3598 goto err_no_verf; 3599 } 3600 maxcount = min_t(int, maxcount-16, bytes_left); 3601 3602 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3603 if (!readdir->rd_dircount) 3604 readdir->rd_dircount = INT_MAX; 3605 3606 readdir->xdr = xdr; 3607 readdir->rd_maxcount = maxcount; 3608 readdir->common.err = 0; 3609 readdir->cookie_offset = 0; 3610 3611 offset = readdir->rd_cookie; 3612 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3613 &offset, 3614 &readdir->common, nfsd4_encode_dirent); 3615 if (nfserr == nfs_ok && 3616 readdir->common.err == nfserr_toosmall && 3617 xdr->buf->len == starting_len + 8) { 3618 /* nothing encoded; which limit did we hit?: */ 3619 if (maxcount - 16 < bytes_left) 3620 /* It was the fault of rd_maxcount: */ 3621 nfserr = nfserr_toosmall; 3622 else 3623 /* We ran out of buffer space: */ 3624 nfserr = nfserr_resource; 3625 } 3626 if (nfserr) 3627 goto err_no_verf; 3628 3629 if (readdir->cookie_offset) { 3630 wire_offset = cpu_to_be64(offset); 3631 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3632 &wire_offset, 8); 3633 } 3634 3635 p = xdr_reserve_space(xdr, 8); 3636 if (!p) { 3637 WARN_ON_ONCE(1); 3638 goto err_no_verf; 3639 } 3640 *p++ = 0; /* no more entries */ 3641 *p++ = htonl(readdir->common.err == nfserr_eof); 3642 3643 return 0; 3644 err_no_verf: 3645 xdr_truncate_encode(xdr, starting_len); 3646 return nfserr; 3647 } 3648 3649 static __be32 3650 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3651 { 3652 struct xdr_stream *xdr = &resp->xdr; 3653 __be32 *p; 3654 3655 if (!nfserr) { 3656 p = xdr_reserve_space(xdr, 20); 3657 if (!p) 3658 return nfserr_resource; 3659 p = encode_cinfo(p, &remove->rm_cinfo); 3660 } 3661 return nfserr; 3662 } 3663 3664 static __be32 3665 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3666 { 3667 struct xdr_stream *xdr = &resp->xdr; 3668 __be32 *p; 3669 3670 if (!nfserr) { 3671 p = xdr_reserve_space(xdr, 40); 3672 if (!p) 3673 return nfserr_resource; 3674 p = encode_cinfo(p, &rename->rn_sinfo); 3675 p = encode_cinfo(p, &rename->rn_tinfo); 3676 } 3677 return nfserr; 3678 } 3679 3680 static __be32 3681 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3682 __be32 nfserr, struct svc_export *exp) 3683 { 3684 u32 i, nflavs, supported; 3685 struct exp_flavor_info *flavs; 3686 struct exp_flavor_info def_flavs[2]; 3687 __be32 *p, *flavorsp; 3688 static bool report = true; 3689 3690 if (nfserr) 3691 goto out; 3692 nfserr = nfserr_resource; 3693 if (exp->ex_nflavors) { 3694 flavs = exp->ex_flavors; 3695 nflavs = exp->ex_nflavors; 3696 } else { /* Handling of some defaults in absence of real secinfo: */ 3697 flavs = def_flavs; 3698 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3699 nflavs = 2; 3700 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3701 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3702 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3703 nflavs = 1; 3704 flavs[0].pseudoflavor 3705 = svcauth_gss_flavor(exp->ex_client); 3706 } else { 3707 nflavs = 1; 3708 flavs[0].pseudoflavor 3709 = exp->ex_client->flavour->flavour; 3710 } 3711 } 3712 3713 supported = 0; 3714 p = xdr_reserve_space(xdr, 4); 3715 if (!p) 3716 goto out; 3717 flavorsp = p++; /* to be backfilled later */ 3718 3719 for (i = 0; i < nflavs; i++) { 3720 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3721 struct rpcsec_gss_info info; 3722 3723 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3724 supported++; 3725 p = xdr_reserve_space(xdr, 4 + 4 + 3726 XDR_LEN(info.oid.len) + 4 + 4); 3727 if (!p) 3728 goto out; 3729 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3730 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3731 *p++ = cpu_to_be32(info.qop); 3732 *p++ = cpu_to_be32(info.service); 3733 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3734 supported++; 3735 p = xdr_reserve_space(xdr, 4); 3736 if (!p) 3737 goto out; 3738 *p++ = cpu_to_be32(pf); 3739 } else { 3740 if (report) 3741 pr_warn("NFS: SECINFO: security flavor %u " 3742 "is not supported\n", pf); 3743 } 3744 } 3745 3746 if (nflavs != supported) 3747 report = false; 3748 *flavorsp = htonl(supported); 3749 nfserr = 0; 3750 out: 3751 if (exp) 3752 exp_put(exp); 3753 return nfserr; 3754 } 3755 3756 static __be32 3757 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3758 struct nfsd4_secinfo *secinfo) 3759 { 3760 struct xdr_stream *xdr = &resp->xdr; 3761 3762 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3763 } 3764 3765 static __be32 3766 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3767 struct nfsd4_secinfo_no_name *secinfo) 3768 { 3769 struct xdr_stream *xdr = &resp->xdr; 3770 3771 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3772 } 3773 3774 /* 3775 * The SETATTR encode routine is special -- it always encodes a bitmap, 3776 * regardless of the error status. 3777 */ 3778 static __be32 3779 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3780 { 3781 struct xdr_stream *xdr = &resp->xdr; 3782 __be32 *p; 3783 3784 p = xdr_reserve_space(xdr, 16); 3785 if (!p) 3786 return nfserr_resource; 3787 if (nfserr) { 3788 *p++ = cpu_to_be32(3); 3789 *p++ = cpu_to_be32(0); 3790 *p++ = cpu_to_be32(0); 3791 *p++ = cpu_to_be32(0); 3792 } 3793 else { 3794 *p++ = cpu_to_be32(3); 3795 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3796 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3797 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3798 } 3799 return nfserr; 3800 } 3801 3802 static __be32 3803 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3804 { 3805 struct xdr_stream *xdr = &resp->xdr; 3806 __be32 *p; 3807 3808 if (!nfserr) { 3809 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3810 if (!p) 3811 return nfserr_resource; 3812 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3813 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3814 NFS4_VERIFIER_SIZE); 3815 } 3816 else if (nfserr == nfserr_clid_inuse) { 3817 p = xdr_reserve_space(xdr, 8); 3818 if (!p) 3819 return nfserr_resource; 3820 *p++ = cpu_to_be32(0); 3821 *p++ = cpu_to_be32(0); 3822 } 3823 return nfserr; 3824 } 3825 3826 static __be32 3827 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3828 { 3829 struct xdr_stream *xdr = &resp->xdr; 3830 __be32 *p; 3831 3832 if (!nfserr) { 3833 p = xdr_reserve_space(xdr, 16); 3834 if (!p) 3835 return nfserr_resource; 3836 *p++ = cpu_to_be32(write->wr_bytes_written); 3837 *p++ = cpu_to_be32(write->wr_how_written); 3838 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3839 NFS4_VERIFIER_SIZE); 3840 } 3841 return nfserr; 3842 } 3843 3844 static const u32 nfs4_minimal_spo_must_enforce[2] = { 3845 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 3846 1 << (OP_EXCHANGE_ID - 32) | 3847 1 << (OP_CREATE_SESSION - 32) | 3848 1 << (OP_DESTROY_SESSION - 32) | 3849 1 << (OP_DESTROY_CLIENTID - 32) 3850 }; 3851 3852 static __be32 3853 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3854 struct nfsd4_exchange_id *exid) 3855 { 3856 struct xdr_stream *xdr = &resp->xdr; 3857 __be32 *p; 3858 char *major_id; 3859 char *server_scope; 3860 int major_id_sz; 3861 int server_scope_sz; 3862 uint64_t minor_id = 0; 3863 3864 if (nfserr) 3865 return nfserr; 3866 3867 major_id = utsname()->nodename; 3868 major_id_sz = strlen(major_id); 3869 server_scope = utsname()->nodename; 3870 server_scope_sz = strlen(server_scope); 3871 3872 p = xdr_reserve_space(xdr, 3873 8 /* eir_clientid */ + 3874 4 /* eir_sequenceid */ + 3875 4 /* eir_flags */ + 3876 4 /* spr_how */); 3877 if (!p) 3878 return nfserr_resource; 3879 3880 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3881 *p++ = cpu_to_be32(exid->seqid); 3882 *p++ = cpu_to_be32(exid->flags); 3883 3884 *p++ = cpu_to_be32(exid->spa_how); 3885 3886 switch (exid->spa_how) { 3887 case SP4_NONE: 3888 break; 3889 case SP4_MACH_CRED: 3890 /* spo_must_enforce, spo_must_allow */ 3891 p = xdr_reserve_space(xdr, 16); 3892 if (!p) 3893 return nfserr_resource; 3894 3895 /* spo_must_enforce bitmap: */ 3896 *p++ = cpu_to_be32(2); 3897 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); 3898 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); 3899 /* empty spo_must_allow bitmap: */ 3900 *p++ = cpu_to_be32(0); 3901 3902 break; 3903 default: 3904 WARN_ON_ONCE(1); 3905 } 3906 3907 p = xdr_reserve_space(xdr, 3908 8 /* so_minor_id */ + 3909 4 /* so_major_id.len */ + 3910 (XDR_QUADLEN(major_id_sz) * 4) + 3911 4 /* eir_server_scope.len */ + 3912 (XDR_QUADLEN(server_scope_sz) * 4) + 3913 4 /* eir_server_impl_id.count (0) */); 3914 if (!p) 3915 return nfserr_resource; 3916 3917 /* The server_owner struct */ 3918 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3919 /* major id */ 3920 p = xdr_encode_opaque(p, major_id, major_id_sz); 3921 3922 /* Server scope */ 3923 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3924 3925 /* Implementation id */ 3926 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3927 return 0; 3928 } 3929 3930 static __be32 3931 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3932 struct nfsd4_create_session *sess) 3933 { 3934 struct xdr_stream *xdr = &resp->xdr; 3935 __be32 *p; 3936 3937 if (nfserr) 3938 return nfserr; 3939 3940 p = xdr_reserve_space(xdr, 24); 3941 if (!p) 3942 return nfserr_resource; 3943 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3944 NFS4_MAX_SESSIONID_LEN); 3945 *p++ = cpu_to_be32(sess->seqid); 3946 *p++ = cpu_to_be32(sess->flags); 3947 3948 p = xdr_reserve_space(xdr, 28); 3949 if (!p) 3950 return nfserr_resource; 3951 *p++ = cpu_to_be32(0); /* headerpadsz */ 3952 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3953 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3954 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3955 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3956 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 3957 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 3958 3959 if (sess->fore_channel.nr_rdma_attrs) { 3960 p = xdr_reserve_space(xdr, 4); 3961 if (!p) 3962 return nfserr_resource; 3963 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 3964 } 3965 3966 p = xdr_reserve_space(xdr, 28); 3967 if (!p) 3968 return nfserr_resource; 3969 *p++ = cpu_to_be32(0); /* headerpadsz */ 3970 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 3971 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 3972 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 3973 *p++ = cpu_to_be32(sess->back_channel.maxops); 3974 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 3975 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 3976 3977 if (sess->back_channel.nr_rdma_attrs) { 3978 p = xdr_reserve_space(xdr, 4); 3979 if (!p) 3980 return nfserr_resource; 3981 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 3982 } 3983 return 0; 3984 } 3985 3986 static __be32 3987 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 3988 struct nfsd4_sequence *seq) 3989 { 3990 struct xdr_stream *xdr = &resp->xdr; 3991 __be32 *p; 3992 3993 if (nfserr) 3994 return nfserr; 3995 3996 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 3997 if (!p) 3998 return nfserr_resource; 3999 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4000 NFS4_MAX_SESSIONID_LEN); 4001 *p++ = cpu_to_be32(seq->seqid); 4002 *p++ = cpu_to_be32(seq->slotid); 4003 /* Note slotid's are numbered from zero: */ 4004 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4005 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4006 *p++ = cpu_to_be32(seq->status_flags); 4007 4008 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4009 return 0; 4010 } 4011 4012 static __be32 4013 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4014 struct nfsd4_test_stateid *test_stateid) 4015 { 4016 struct xdr_stream *xdr = &resp->xdr; 4017 struct nfsd4_test_stateid_id *stateid, *next; 4018 __be32 *p; 4019 4020 if (nfserr) 4021 return nfserr; 4022 4023 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4024 if (!p) 4025 return nfserr_resource; 4026 *p++ = htonl(test_stateid->ts_num_ids); 4027 4028 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4029 *p++ = stateid->ts_id_status; 4030 } 4031 4032 return nfserr; 4033 } 4034 4035 #ifdef CONFIG_NFSD_PNFS 4036 static __be32 4037 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4038 struct nfsd4_getdeviceinfo *gdev) 4039 { 4040 struct xdr_stream *xdr = &resp->xdr; 4041 const struct nfsd4_layout_ops *ops = 4042 nfsd4_layout_ops[gdev->gd_layout_type]; 4043 u32 starting_len = xdr->buf->len, needed_len; 4044 __be32 *p; 4045 4046 dprintk("%s: err %d\n", __func__, nfserr); 4047 if (nfserr) 4048 goto out; 4049 4050 nfserr = nfserr_resource; 4051 p = xdr_reserve_space(xdr, 4); 4052 if (!p) 4053 goto out; 4054 4055 *p++ = cpu_to_be32(gdev->gd_layout_type); 4056 4057 /* If maxcount is 0 then just update notifications */ 4058 if (gdev->gd_maxcount != 0) { 4059 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4060 if (nfserr) { 4061 /* 4062 * We don't bother to burden the layout drivers with 4063 * enforcing gd_maxcount, just tell the client to 4064 * come back with a bigger buffer if it's not enough. 4065 */ 4066 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4067 goto toosmall; 4068 goto out; 4069 } 4070 } 4071 4072 nfserr = nfserr_resource; 4073 if (gdev->gd_notify_types) { 4074 p = xdr_reserve_space(xdr, 4 + 4); 4075 if (!p) 4076 goto out; 4077 *p++ = cpu_to_be32(1); /* bitmap length */ 4078 *p++ = cpu_to_be32(gdev->gd_notify_types); 4079 } else { 4080 p = xdr_reserve_space(xdr, 4); 4081 if (!p) 4082 goto out; 4083 *p++ = 0; 4084 } 4085 4086 nfserr = 0; 4087 out: 4088 kfree(gdev->gd_device); 4089 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4090 return nfserr; 4091 4092 toosmall: 4093 dprintk("%s: maxcount too small\n", __func__); 4094 needed_len = xdr->buf->len + 4 /* notifications */; 4095 xdr_truncate_encode(xdr, starting_len); 4096 p = xdr_reserve_space(xdr, 4); 4097 if (!p) { 4098 nfserr = nfserr_resource; 4099 } else { 4100 *p++ = cpu_to_be32(needed_len); 4101 nfserr = nfserr_toosmall; 4102 } 4103 goto out; 4104 } 4105 4106 static __be32 4107 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4108 struct nfsd4_layoutget *lgp) 4109 { 4110 struct xdr_stream *xdr = &resp->xdr; 4111 const struct nfsd4_layout_ops *ops = 4112 nfsd4_layout_ops[lgp->lg_layout_type]; 4113 __be32 *p; 4114 4115 dprintk("%s: err %d\n", __func__, nfserr); 4116 if (nfserr) 4117 goto out; 4118 4119 nfserr = nfserr_resource; 4120 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4121 if (!p) 4122 goto out; 4123 4124 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4125 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4126 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4127 sizeof(stateid_opaque_t)); 4128 4129 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4130 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4131 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4132 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4133 *p++ = cpu_to_be32(lgp->lg_layout_type); 4134 4135 nfserr = ops->encode_layoutget(xdr, lgp); 4136 out: 4137 kfree(lgp->lg_content); 4138 return nfserr; 4139 } 4140 4141 static __be32 4142 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4143 struct nfsd4_layoutcommit *lcp) 4144 { 4145 struct xdr_stream *xdr = &resp->xdr; 4146 __be32 *p; 4147 4148 if (nfserr) 4149 return nfserr; 4150 4151 p = xdr_reserve_space(xdr, 4); 4152 if (!p) 4153 return nfserr_resource; 4154 *p++ = cpu_to_be32(lcp->lc_size_chg); 4155 if (lcp->lc_size_chg) { 4156 p = xdr_reserve_space(xdr, 8); 4157 if (!p) 4158 return nfserr_resource; 4159 p = xdr_encode_hyper(p, lcp->lc_newsize); 4160 } 4161 4162 return nfs_ok; 4163 } 4164 4165 static __be32 4166 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4167 struct nfsd4_layoutreturn *lrp) 4168 { 4169 struct xdr_stream *xdr = &resp->xdr; 4170 __be32 *p; 4171 4172 if (nfserr) 4173 return nfserr; 4174 4175 p = xdr_reserve_space(xdr, 4); 4176 if (!p) 4177 return nfserr_resource; 4178 *p++ = cpu_to_be32(lrp->lrs_present); 4179 if (lrp->lrs_present) 4180 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4181 return nfs_ok; 4182 } 4183 #endif /* CONFIG_NFSD_PNFS */ 4184 4185 static __be32 4186 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4187 struct nfsd4_seek *seek) 4188 { 4189 __be32 *p; 4190 4191 if (nfserr) 4192 return nfserr; 4193 4194 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4195 *p++ = cpu_to_be32(seek->seek_eof); 4196 p = xdr_encode_hyper(p, seek->seek_pos); 4197 4198 return nfserr; 4199 } 4200 4201 static __be32 4202 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4203 { 4204 return nfserr; 4205 } 4206 4207 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4208 4209 /* 4210 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4211 * since we don't need to filter out obsolete ops as this is 4212 * done in the decoding phase. 4213 */ 4214 static nfsd4_enc nfsd4_enc_ops[] = { 4215 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4216 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4217 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4218 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4219 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4220 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4221 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4222 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4223 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4224 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4225 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4226 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4227 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4228 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4229 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4230 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4231 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4232 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4233 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4234 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4235 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4236 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4237 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4238 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4239 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4240 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4241 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4242 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4243 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4244 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4245 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4246 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4247 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4248 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4249 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4250 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4251 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4252 4253 /* NFSv4.1 operations */ 4254 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4255 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4256 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4257 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4258 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4259 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4260 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4261 #ifdef CONFIG_NFSD_PNFS 4262 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4263 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4264 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4265 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4266 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4267 #else 4268 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4269 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4270 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4271 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4272 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4273 #endif 4274 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4275 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4276 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4277 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4278 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4279 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4280 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4281 4282 /* NFSv4.2 operations */ 4283 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4284 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, 4285 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4286 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4287 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4288 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4289 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4290 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4291 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4292 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4293 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4294 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4295 }; 4296 4297 /* 4298 * Calculate whether we still have space to encode repsize bytes. 4299 * There are two considerations: 4300 * - For NFS versions >=4.1, the size of the reply must stay within 4301 * session limits 4302 * - For all NFS versions, we must stay within limited preallocated 4303 * buffer space. 4304 * 4305 * This is called before the operation is processed, so can only provide 4306 * an upper estimate. For some nonidempotent operations (such as 4307 * getattr), it's not necessarily a problem if that estimate is wrong, 4308 * as we can fail it after processing without significant side effects. 4309 */ 4310 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4311 { 4312 struct xdr_buf *buf = &resp->rqstp->rq_res; 4313 struct nfsd4_slot *slot = resp->cstate.slot; 4314 4315 if (buf->len + respsize <= buf->buflen) 4316 return nfs_ok; 4317 if (!nfsd4_has_session(&resp->cstate)) 4318 return nfserr_resource; 4319 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4320 WARN_ON_ONCE(1); 4321 return nfserr_rep_too_big_to_cache; 4322 } 4323 return nfserr_rep_too_big; 4324 } 4325 4326 void 4327 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4328 { 4329 struct xdr_stream *xdr = &resp->xdr; 4330 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4331 struct svc_rqst *rqstp = resp->rqstp; 4332 int post_err_offset; 4333 nfsd4_enc encoder; 4334 __be32 *p; 4335 4336 p = xdr_reserve_space(xdr, 8); 4337 if (!p) { 4338 WARN_ON_ONCE(1); 4339 return; 4340 } 4341 *p++ = cpu_to_be32(op->opnum); 4342 post_err_offset = xdr->buf->len; 4343 4344 if (op->opnum == OP_ILLEGAL) 4345 goto status; 4346 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4347 !nfsd4_enc_ops[op->opnum]); 4348 encoder = nfsd4_enc_ops[op->opnum]; 4349 op->status = encoder(resp, op->status, &op->u); 4350 xdr_commit_encode(xdr); 4351 4352 /* nfsd4_check_resp_size guarantees enough room for error status */ 4353 if (!op->status) { 4354 int space_needed = 0; 4355 if (!nfsd4_last_compound_op(rqstp)) 4356 space_needed = COMPOUND_ERR_SLACK_SPACE; 4357 op->status = nfsd4_check_resp_size(resp, space_needed); 4358 } 4359 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4360 struct nfsd4_slot *slot = resp->cstate.slot; 4361 4362 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4363 op->status = nfserr_rep_too_big_to_cache; 4364 else 4365 op->status = nfserr_rep_too_big; 4366 } 4367 if (op->status == nfserr_resource || 4368 op->status == nfserr_rep_too_big || 4369 op->status == nfserr_rep_too_big_to_cache) { 4370 /* 4371 * The operation may have already been encoded or 4372 * partially encoded. No op returns anything additional 4373 * in the case of one of these three errors, so we can 4374 * just truncate back to after the status. But it's a 4375 * bug if we had to do this on a non-idempotent op: 4376 */ 4377 warn_on_nonidempotent_op(op); 4378 xdr_truncate_encode(xdr, post_err_offset); 4379 } 4380 if (so) { 4381 int len = xdr->buf->len - post_err_offset; 4382 4383 so->so_replay.rp_status = op->status; 4384 so->so_replay.rp_buflen = len; 4385 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4386 so->so_replay.rp_buf, len); 4387 } 4388 status: 4389 /* Note that op->status is already in network byte order: */ 4390 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4391 } 4392 4393 /* 4394 * Encode the reply stored in the stateowner reply cache 4395 * 4396 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4397 * previously sent already encoded operation. 4398 */ 4399 void 4400 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4401 { 4402 __be32 *p; 4403 struct nfs4_replay *rp = op->replay; 4404 4405 BUG_ON(!rp); 4406 4407 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4408 if (!p) { 4409 WARN_ON_ONCE(1); 4410 return; 4411 } 4412 *p++ = cpu_to_be32(op->opnum); 4413 *p++ = rp->rp_status; /* already xdr'ed */ 4414 4415 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4416 } 4417 4418 int 4419 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4420 { 4421 return xdr_ressize_check(rqstp, p); 4422 } 4423 4424 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4425 { 4426 struct svc_rqst *rqstp = rq; 4427 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4428 4429 if (args->ops != args->iops) { 4430 kfree(args->ops); 4431 args->ops = args->iops; 4432 } 4433 kfree(args->tmpp); 4434 args->tmpp = NULL; 4435 while (args->to_free) { 4436 struct svcxdr_tmpbuf *tb = args->to_free; 4437 args->to_free = tb->next; 4438 kfree(tb); 4439 } 4440 return 1; 4441 } 4442 4443 int 4444 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4445 { 4446 if (rqstp->rq_arg.head[0].iov_len % 4) { 4447 /* client is nuts */ 4448 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4449 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4450 return 0; 4451 } 4452 args->p = p; 4453 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4454 args->pagelist = rqstp->rq_arg.pages; 4455 args->pagelen = rqstp->rq_arg.page_len; 4456 args->tmpp = NULL; 4457 args->to_free = NULL; 4458 args->ops = args->iops; 4459 args->rqstp = rqstp; 4460 4461 return !nfsd4_decode_compound(args); 4462 } 4463 4464 int 4465 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4466 { 4467 /* 4468 * All that remains is to write the tag and operation count... 4469 */ 4470 struct xdr_buf *buf = resp->xdr.buf; 4471 4472 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4473 buf->tail[0].iov_len); 4474 4475 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4476 4477 p = resp->tagp; 4478 *p++ = htonl(resp->taglen); 4479 memcpy(p, resp->tag, resp->taglen); 4480 p += XDR_QUADLEN(resp->taglen); 4481 *p++ = htonl(resp->opcnt); 4482 4483 nfsd4_sequence_done(resp); 4484 return 1; 4485 } 4486 4487 /* 4488 * Local variables: 4489 * c-basic-offset: 8 4490 * End: 4491 */ 4492