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/slab.h> 37 #include <linux/namei.h> 38 #include <linux/statfs.h> 39 #include <linux/utsname.h> 40 #include <linux/pagemap.h> 41 #include <linux/sunrpc/svcauth_gss.h> 42 43 #include "idmap.h" 44 #include "acl.h" 45 #include "xdr4.h" 46 #include "vfs.h" 47 #include "state.h" 48 #include "cache.h" 49 #include "netns.h" 50 #include "pnfs.h" 51 52 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 53 #include <linux/security.h> 54 #endif 55 56 57 #define NFSDDBG_FACILITY NFSDDBG_XDR 58 59 /* 60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 61 * directory in order to indicate to the client that a filesystem boundary is present 62 * We use a fixed fsid for a referral 63 */ 64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 66 67 static __be32 68 check_filename(char *str, int len) 69 { 70 int i; 71 72 if (len == 0) 73 return nfserr_inval; 74 if (isdotent(str, len)) 75 return nfserr_badname; 76 for (i = 0; i < len; i++) 77 if (str[i] == '/') 78 return nfserr_badname; 79 return 0; 80 } 81 82 #define DECODE_HEAD \ 83 __be32 *p; \ 84 __be32 status 85 #define DECODE_TAIL \ 86 status = 0; \ 87 out: \ 88 return status; \ 89 xdr_error: \ 90 dprintk("NFSD: xdr error (%s:%d)\n", \ 91 __FILE__, __LINE__); \ 92 status = nfserr_bad_xdr; \ 93 goto out 94 95 #define READMEM(x,nbytes) do { \ 96 x = (char *)p; \ 97 p += XDR_QUADLEN(nbytes); \ 98 } while (0) 99 #define SAVEMEM(x,nbytes) do { \ 100 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 101 savemem(argp, p, nbytes) : \ 102 (char *)p)) { \ 103 dprintk("NFSD: xdr error (%s:%d)\n", \ 104 __FILE__, __LINE__); \ 105 goto xdr_error; \ 106 } \ 107 p += XDR_QUADLEN(nbytes); \ 108 } while (0) 109 #define COPYMEM(x,nbytes) do { \ 110 memcpy((x), p, nbytes); \ 111 p += XDR_QUADLEN(nbytes); \ 112 } while (0) 113 114 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 115 #define READ_BUF(nbytes) do { \ 116 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 117 p = argp->p; \ 118 argp->p += XDR_QUADLEN(nbytes); \ 119 } else if (!(p = read_buf(argp, nbytes))) { \ 120 dprintk("NFSD: xdr error (%s:%d)\n", \ 121 __FILE__, __LINE__); \ 122 goto xdr_error; \ 123 } \ 124 } while (0) 125 126 static void next_decode_page(struct nfsd4_compoundargs *argp) 127 { 128 argp->p = page_address(argp->pagelist[0]); 129 argp->pagelist++; 130 if (argp->pagelen < PAGE_SIZE) { 131 argp->end = argp->p + (argp->pagelen>>2); 132 argp->pagelen = 0; 133 } else { 134 argp->end = argp->p + (PAGE_SIZE>>2); 135 argp->pagelen -= PAGE_SIZE; 136 } 137 } 138 139 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 140 { 141 /* We want more bytes than seem to be available. 142 * Maybe we need a new page, maybe we have just run out 143 */ 144 unsigned int avail = (char *)argp->end - (char *)argp->p; 145 __be32 *p; 146 if (avail + argp->pagelen < nbytes) 147 return NULL; 148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 149 return NULL; 150 /* ok, we can do it with the current plus the next page */ 151 if (nbytes <= sizeof(argp->tmp)) 152 p = argp->tmp; 153 else { 154 kfree(argp->tmpp); 155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 156 if (!p) 157 return NULL; 158 159 } 160 /* 161 * The following memcpy is safe because read_buf is always 162 * called with nbytes > avail, and the two cases above both 163 * guarantee p points to at least nbytes bytes. 164 */ 165 memcpy(p, argp->p, avail); 166 next_decode_page(argp); 167 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 168 argp->p += XDR_QUADLEN(nbytes - avail); 169 return p; 170 } 171 172 static int zero_clientid(clientid_t *clid) 173 { 174 return (clid->cl_boot == 0) && (clid->cl_id == 0); 175 } 176 177 /** 178 * svcxdr_tmpalloc - allocate memory to be freed after compound processing 179 * @argp: NFSv4 compound argument structure 180 * @p: pointer to be freed (with kfree()) 181 * 182 * Marks @p to be freed when processing the compound operation 183 * described in @argp finishes. 184 */ 185 static void * 186 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) 187 { 188 struct svcxdr_tmpbuf *tb; 189 190 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); 191 if (!tb) 192 return NULL; 193 tb->next = argp->to_free; 194 argp->to_free = tb; 195 return tb->buf; 196 } 197 198 /* 199 * For xdr strings that need to be passed to other kernel api's 200 * as null-terminated strings. 201 * 202 * Note null-terminating in place usually isn't safe since the 203 * buffer might end on a page boundary. 204 */ 205 static char * 206 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) 207 { 208 char *p = svcxdr_tmpalloc(argp, len + 1); 209 210 if (!p) 211 return NULL; 212 memcpy(p, buf, len); 213 p[len] = '\0'; 214 return p; 215 } 216 217 /** 218 * savemem - duplicate a chunk of memory for later processing 219 * @argp: NFSv4 compound argument structure to be freed with 220 * @p: pointer to be duplicated 221 * @nbytes: length to be duplicated 222 * 223 * Returns a pointer to a copy of @nbytes bytes of memory at @p 224 * that are preserved until processing of the NFSv4 compound 225 * operation described by @argp finishes. 226 */ 227 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 228 { 229 void *ret; 230 231 ret = svcxdr_tmpalloc(argp, nbytes); 232 if (!ret) 233 return NULL; 234 memcpy(ret, p, nbytes); 235 return ret; 236 } 237 238 /* 239 * We require the high 32 bits of 'seconds' to be 0, and 240 * we ignore all 32 bits of 'nseconds'. 241 */ 242 static __be32 243 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv) 244 { 245 DECODE_HEAD; 246 u64 sec; 247 248 READ_BUF(12); 249 p = xdr_decode_hyper(p, &sec); 250 tv->tv_sec = sec; 251 tv->tv_nsec = be32_to_cpup(p++); 252 if (tv->tv_nsec >= (u32)1000000000) 253 return nfserr_inval; 254 255 DECODE_TAIL; 256 } 257 258 static __be32 259 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 260 { 261 u32 bmlen; 262 DECODE_HEAD; 263 264 bmval[0] = 0; 265 bmval[1] = 0; 266 bmval[2] = 0; 267 268 READ_BUF(4); 269 bmlen = be32_to_cpup(p++); 270 if (bmlen > 1000) 271 goto xdr_error; 272 273 READ_BUF(bmlen << 2); 274 if (bmlen > 0) 275 bmval[0] = be32_to_cpup(p++); 276 if (bmlen > 1) 277 bmval[1] = be32_to_cpup(p++); 278 if (bmlen > 2) 279 bmval[2] = be32_to_cpup(p++); 280 281 DECODE_TAIL; 282 } 283 284 static __be32 285 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 286 struct iattr *iattr, struct nfs4_acl **acl, 287 struct xdr_netobj *label) 288 { 289 int expected_len, len = 0; 290 u32 dummy32; 291 char *buf; 292 293 DECODE_HEAD; 294 iattr->ia_valid = 0; 295 if ((status = nfsd4_decode_bitmap(argp, bmval))) 296 return status; 297 298 READ_BUF(4); 299 expected_len = be32_to_cpup(p++); 300 301 if (bmval[0] & FATTR4_WORD0_SIZE) { 302 READ_BUF(8); 303 len += 8; 304 p = xdr_decode_hyper(p, &iattr->ia_size); 305 iattr->ia_valid |= ATTR_SIZE; 306 } 307 if (bmval[0] & FATTR4_WORD0_ACL) { 308 u32 nace; 309 struct nfs4_ace *ace; 310 311 READ_BUF(4); len += 4; 312 nace = be32_to_cpup(p++); 313 314 if (nace > NFS4_ACL_MAX) 315 return nfserr_fbig; 316 317 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); 318 if (*acl == NULL) 319 return nfserr_jukebox; 320 321 (*acl)->naces = nace; 322 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 323 READ_BUF(16); len += 16; 324 ace->type = be32_to_cpup(p++); 325 ace->flag = be32_to_cpup(p++); 326 ace->access_mask = be32_to_cpup(p++); 327 dummy32 = be32_to_cpup(p++); 328 READ_BUF(dummy32); 329 len += XDR_QUADLEN(dummy32) << 2; 330 READMEM(buf, dummy32); 331 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 332 status = nfs_ok; 333 if (ace->whotype != NFS4_ACL_WHO_NAMED) 334 ; 335 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 336 status = nfsd_map_name_to_gid(argp->rqstp, 337 buf, dummy32, &ace->who_gid); 338 else 339 status = nfsd_map_name_to_uid(argp->rqstp, 340 buf, dummy32, &ace->who_uid); 341 if (status) 342 return status; 343 } 344 } else 345 *acl = NULL; 346 if (bmval[1] & FATTR4_WORD1_MODE) { 347 READ_BUF(4); 348 len += 4; 349 iattr->ia_mode = be32_to_cpup(p++); 350 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 351 iattr->ia_valid |= ATTR_MODE; 352 } 353 if (bmval[1] & FATTR4_WORD1_OWNER) { 354 READ_BUF(4); 355 len += 4; 356 dummy32 = be32_to_cpup(p++); 357 READ_BUF(dummy32); 358 len += (XDR_QUADLEN(dummy32) << 2); 359 READMEM(buf, dummy32); 360 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 361 return status; 362 iattr->ia_valid |= ATTR_UID; 363 } 364 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 365 READ_BUF(4); 366 len += 4; 367 dummy32 = be32_to_cpup(p++); 368 READ_BUF(dummy32); 369 len += (XDR_QUADLEN(dummy32) << 2); 370 READMEM(buf, dummy32); 371 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 372 return status; 373 iattr->ia_valid |= ATTR_GID; 374 } 375 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 376 READ_BUF(4); 377 len += 4; 378 dummy32 = be32_to_cpup(p++); 379 switch (dummy32) { 380 case NFS4_SET_TO_CLIENT_TIME: 381 len += 12; 382 status = nfsd4_decode_time(argp, &iattr->ia_atime); 383 if (status) 384 return status; 385 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 386 break; 387 case NFS4_SET_TO_SERVER_TIME: 388 iattr->ia_valid |= ATTR_ATIME; 389 break; 390 default: 391 goto xdr_error; 392 } 393 } 394 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 395 READ_BUF(4); 396 len += 4; 397 dummy32 = be32_to_cpup(p++); 398 switch (dummy32) { 399 case NFS4_SET_TO_CLIENT_TIME: 400 len += 12; 401 status = nfsd4_decode_time(argp, &iattr->ia_mtime); 402 if (status) 403 return status; 404 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 405 break; 406 case NFS4_SET_TO_SERVER_TIME: 407 iattr->ia_valid |= ATTR_MTIME; 408 break; 409 default: 410 goto xdr_error; 411 } 412 } 413 414 label->len = 0; 415 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 416 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { 417 READ_BUF(4); 418 len += 4; 419 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ 420 READ_BUF(4); 421 len += 4; 422 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ 423 READ_BUF(4); 424 len += 4; 425 dummy32 = be32_to_cpup(p++); 426 READ_BUF(dummy32); 427 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN) 428 return nfserr_badlabel; 429 len += (XDR_QUADLEN(dummy32) << 2); 430 READMEM(buf, dummy32); 431 label->len = dummy32; 432 label->data = svcxdr_dupstr(argp, buf, dummy32); 433 if (!label->data) 434 return nfserr_jukebox; 435 } 436 #endif 437 438 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 439 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 440 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 441 READ_BUF(expected_len - len); 442 else if (len != expected_len) 443 goto xdr_error; 444 445 DECODE_TAIL; 446 } 447 448 static __be32 449 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 450 { 451 DECODE_HEAD; 452 453 READ_BUF(sizeof(stateid_t)); 454 sid->si_generation = be32_to_cpup(p++); 455 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 456 457 DECODE_TAIL; 458 } 459 460 static __be32 461 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 462 { 463 DECODE_HEAD; 464 465 READ_BUF(4); 466 access->ac_req_access = be32_to_cpup(p++); 467 468 DECODE_TAIL; 469 } 470 471 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 472 { 473 DECODE_HEAD; 474 u32 dummy, uid, gid; 475 char *machine_name; 476 int i; 477 int nr_secflavs; 478 479 /* callback_sec_params4 */ 480 READ_BUF(4); 481 nr_secflavs = be32_to_cpup(p++); 482 if (nr_secflavs) 483 cbs->flavor = (u32)(-1); 484 else 485 /* Is this legal? Be generous, take it to mean AUTH_NONE: */ 486 cbs->flavor = 0; 487 for (i = 0; i < nr_secflavs; ++i) { 488 READ_BUF(4); 489 dummy = be32_to_cpup(p++); 490 switch (dummy) { 491 case RPC_AUTH_NULL: 492 /* Nothing to read */ 493 if (cbs->flavor == (u32)(-1)) 494 cbs->flavor = RPC_AUTH_NULL; 495 break; 496 case RPC_AUTH_UNIX: 497 READ_BUF(8); 498 /* stamp */ 499 dummy = be32_to_cpup(p++); 500 501 /* machine name */ 502 dummy = be32_to_cpup(p++); 503 READ_BUF(dummy); 504 SAVEMEM(machine_name, dummy); 505 506 /* uid, gid */ 507 READ_BUF(8); 508 uid = be32_to_cpup(p++); 509 gid = be32_to_cpup(p++); 510 511 /* more gids */ 512 READ_BUF(4); 513 dummy = be32_to_cpup(p++); 514 READ_BUF(dummy * 4); 515 if (cbs->flavor == (u32)(-1)) { 516 kuid_t kuid = make_kuid(&init_user_ns, uid); 517 kgid_t kgid = make_kgid(&init_user_ns, gid); 518 if (uid_valid(kuid) && gid_valid(kgid)) { 519 cbs->uid = kuid; 520 cbs->gid = kgid; 521 cbs->flavor = RPC_AUTH_UNIX; 522 } else { 523 dprintk("RPC_AUTH_UNIX with invalid" 524 "uid or gid ignoring!\n"); 525 } 526 } 527 break; 528 case RPC_AUTH_GSS: 529 dprintk("RPC_AUTH_GSS callback secflavor " 530 "not supported!\n"); 531 READ_BUF(8); 532 /* gcbp_service */ 533 dummy = be32_to_cpup(p++); 534 /* gcbp_handle_from_server */ 535 dummy = be32_to_cpup(p++); 536 READ_BUF(dummy); 537 p += XDR_QUADLEN(dummy); 538 /* gcbp_handle_from_client */ 539 READ_BUF(4); 540 dummy = be32_to_cpup(p++); 541 READ_BUF(dummy); 542 break; 543 default: 544 dprintk("Illegal callback secflavor\n"); 545 return nfserr_inval; 546 } 547 } 548 DECODE_TAIL; 549 } 550 551 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 552 { 553 DECODE_HEAD; 554 555 READ_BUF(4); 556 bc->bc_cb_program = be32_to_cpup(p++); 557 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 558 559 DECODE_TAIL; 560 } 561 562 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 563 { 564 DECODE_HEAD; 565 566 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 567 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 568 bcts->dir = be32_to_cpup(p++); 569 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 570 * could help us figure out we should be using it. */ 571 DECODE_TAIL; 572 } 573 574 static __be32 575 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 576 { 577 DECODE_HEAD; 578 579 READ_BUF(4); 580 close->cl_seqid = be32_to_cpup(p++); 581 return nfsd4_decode_stateid(argp, &close->cl_stateid); 582 583 DECODE_TAIL; 584 } 585 586 587 static __be32 588 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 589 { 590 DECODE_HEAD; 591 592 READ_BUF(12); 593 p = xdr_decode_hyper(p, &commit->co_offset); 594 commit->co_count = be32_to_cpup(p++); 595 596 DECODE_TAIL; 597 } 598 599 static __be32 600 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 601 { 602 DECODE_HEAD; 603 604 READ_BUF(4); 605 create->cr_type = be32_to_cpup(p++); 606 switch (create->cr_type) { 607 case NF4LNK: 608 READ_BUF(4); 609 create->cr_datalen = be32_to_cpup(p++); 610 READ_BUF(create->cr_datalen); 611 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); 612 if (!create->cr_data) 613 return nfserr_jukebox; 614 break; 615 case NF4BLK: 616 case NF4CHR: 617 READ_BUF(8); 618 create->cr_specdata1 = be32_to_cpup(p++); 619 create->cr_specdata2 = be32_to_cpup(p++); 620 break; 621 case NF4SOCK: 622 case NF4FIFO: 623 case NF4DIR: 624 default: 625 break; 626 } 627 628 READ_BUF(4); 629 create->cr_namelen = be32_to_cpup(p++); 630 READ_BUF(create->cr_namelen); 631 SAVEMEM(create->cr_name, create->cr_namelen); 632 if ((status = check_filename(create->cr_name, create->cr_namelen))) 633 return status; 634 635 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 636 &create->cr_acl, &create->cr_label); 637 if (status) 638 goto out; 639 640 DECODE_TAIL; 641 } 642 643 static inline __be32 644 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 645 { 646 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 647 } 648 649 static inline __be32 650 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 651 { 652 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 653 } 654 655 static __be32 656 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 657 { 658 DECODE_HEAD; 659 660 READ_BUF(4); 661 link->li_namelen = be32_to_cpup(p++); 662 READ_BUF(link->li_namelen); 663 SAVEMEM(link->li_name, link->li_namelen); 664 if ((status = check_filename(link->li_name, link->li_namelen))) 665 return status; 666 667 DECODE_TAIL; 668 } 669 670 static __be32 671 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 672 { 673 DECODE_HEAD; 674 675 /* 676 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 677 */ 678 READ_BUF(28); 679 lock->lk_type = be32_to_cpup(p++); 680 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 681 goto xdr_error; 682 lock->lk_reclaim = be32_to_cpup(p++); 683 p = xdr_decode_hyper(p, &lock->lk_offset); 684 p = xdr_decode_hyper(p, &lock->lk_length); 685 lock->lk_is_new = be32_to_cpup(p++); 686 687 if (lock->lk_is_new) { 688 READ_BUF(4); 689 lock->lk_new_open_seqid = be32_to_cpup(p++); 690 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 691 if (status) 692 return status; 693 READ_BUF(8 + sizeof(clientid_t)); 694 lock->lk_new_lock_seqid = be32_to_cpup(p++); 695 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 696 lock->lk_new_owner.len = be32_to_cpup(p++); 697 READ_BUF(lock->lk_new_owner.len); 698 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 699 } else { 700 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 701 if (status) 702 return status; 703 READ_BUF(4); 704 lock->lk_old_lock_seqid = be32_to_cpup(p++); 705 } 706 707 DECODE_TAIL; 708 } 709 710 static __be32 711 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 712 { 713 DECODE_HEAD; 714 715 READ_BUF(32); 716 lockt->lt_type = be32_to_cpup(p++); 717 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 718 goto xdr_error; 719 p = xdr_decode_hyper(p, &lockt->lt_offset); 720 p = xdr_decode_hyper(p, &lockt->lt_length); 721 COPYMEM(&lockt->lt_clientid, 8); 722 lockt->lt_owner.len = be32_to_cpup(p++); 723 READ_BUF(lockt->lt_owner.len); 724 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 725 726 DECODE_TAIL; 727 } 728 729 static __be32 730 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 731 { 732 DECODE_HEAD; 733 734 READ_BUF(8); 735 locku->lu_type = be32_to_cpup(p++); 736 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 737 goto xdr_error; 738 locku->lu_seqid = be32_to_cpup(p++); 739 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 740 if (status) 741 return status; 742 READ_BUF(16); 743 p = xdr_decode_hyper(p, &locku->lu_offset); 744 p = xdr_decode_hyper(p, &locku->lu_length); 745 746 DECODE_TAIL; 747 } 748 749 static __be32 750 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 751 { 752 DECODE_HEAD; 753 754 READ_BUF(4); 755 lookup->lo_len = be32_to_cpup(p++); 756 READ_BUF(lookup->lo_len); 757 SAVEMEM(lookup->lo_name, lookup->lo_len); 758 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 759 return status; 760 761 DECODE_TAIL; 762 } 763 764 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 765 { 766 __be32 *p; 767 u32 w; 768 769 READ_BUF(4); 770 w = be32_to_cpup(p++); 771 *share_access = w & NFS4_SHARE_ACCESS_MASK; 772 *deleg_want = w & NFS4_SHARE_WANT_MASK; 773 if (deleg_when) 774 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 775 776 switch (w & NFS4_SHARE_ACCESS_MASK) { 777 case NFS4_SHARE_ACCESS_READ: 778 case NFS4_SHARE_ACCESS_WRITE: 779 case NFS4_SHARE_ACCESS_BOTH: 780 break; 781 default: 782 return nfserr_bad_xdr; 783 } 784 w &= ~NFS4_SHARE_ACCESS_MASK; 785 if (!w) 786 return nfs_ok; 787 if (!argp->minorversion) 788 return nfserr_bad_xdr; 789 switch (w & NFS4_SHARE_WANT_MASK) { 790 case NFS4_SHARE_WANT_NO_PREFERENCE: 791 case NFS4_SHARE_WANT_READ_DELEG: 792 case NFS4_SHARE_WANT_WRITE_DELEG: 793 case NFS4_SHARE_WANT_ANY_DELEG: 794 case NFS4_SHARE_WANT_NO_DELEG: 795 case NFS4_SHARE_WANT_CANCEL: 796 break; 797 default: 798 return nfserr_bad_xdr; 799 } 800 w &= ~NFS4_SHARE_WANT_MASK; 801 if (!w) 802 return nfs_ok; 803 804 if (!deleg_when) /* open_downgrade */ 805 return nfserr_inval; 806 switch (w) { 807 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 808 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 809 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 810 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 811 return nfs_ok; 812 } 813 xdr_error: 814 return nfserr_bad_xdr; 815 } 816 817 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 818 { 819 __be32 *p; 820 821 READ_BUF(4); 822 *x = be32_to_cpup(p++); 823 /* Note: unlinke access bits, deny bits may be zero. */ 824 if (*x & ~NFS4_SHARE_DENY_BOTH) 825 return nfserr_bad_xdr; 826 return nfs_ok; 827 xdr_error: 828 return nfserr_bad_xdr; 829 } 830 831 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 832 { 833 __be32 *p; 834 835 READ_BUF(4); 836 o->len = be32_to_cpup(p++); 837 838 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 839 return nfserr_bad_xdr; 840 841 READ_BUF(o->len); 842 SAVEMEM(o->data, o->len); 843 return nfs_ok; 844 xdr_error: 845 return nfserr_bad_xdr; 846 } 847 848 static __be32 849 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 850 { 851 DECODE_HEAD; 852 u32 dummy; 853 854 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 855 open->op_iattr.ia_valid = 0; 856 open->op_openowner = NULL; 857 858 open->op_xdr_error = 0; 859 /* seqid, share_access, share_deny, clientid, ownerlen */ 860 READ_BUF(4); 861 open->op_seqid = be32_to_cpup(p++); 862 /* decode, yet ignore deleg_when until supported */ 863 status = nfsd4_decode_share_access(argp, &open->op_share_access, 864 &open->op_deleg_want, &dummy); 865 if (status) 866 goto xdr_error; 867 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 868 if (status) 869 goto xdr_error; 870 READ_BUF(sizeof(clientid_t)); 871 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 872 status = nfsd4_decode_opaque(argp, &open->op_owner); 873 if (status) 874 goto xdr_error; 875 READ_BUF(4); 876 open->op_create = be32_to_cpup(p++); 877 switch (open->op_create) { 878 case NFS4_OPEN_NOCREATE: 879 break; 880 case NFS4_OPEN_CREATE: 881 READ_BUF(4); 882 open->op_createmode = be32_to_cpup(p++); 883 switch (open->op_createmode) { 884 case NFS4_CREATE_UNCHECKED: 885 case NFS4_CREATE_GUARDED: 886 status = nfsd4_decode_fattr(argp, open->op_bmval, 887 &open->op_iattr, &open->op_acl, &open->op_label); 888 if (status) 889 goto out; 890 break; 891 case NFS4_CREATE_EXCLUSIVE: 892 READ_BUF(NFS4_VERIFIER_SIZE); 893 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 894 break; 895 case NFS4_CREATE_EXCLUSIVE4_1: 896 if (argp->minorversion < 1) 897 goto xdr_error; 898 READ_BUF(NFS4_VERIFIER_SIZE); 899 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 900 status = nfsd4_decode_fattr(argp, open->op_bmval, 901 &open->op_iattr, &open->op_acl, &open->op_label); 902 if (status) 903 goto out; 904 break; 905 default: 906 goto xdr_error; 907 } 908 break; 909 default: 910 goto xdr_error; 911 } 912 913 /* open_claim */ 914 READ_BUF(4); 915 open->op_claim_type = be32_to_cpup(p++); 916 switch (open->op_claim_type) { 917 case NFS4_OPEN_CLAIM_NULL: 918 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 919 READ_BUF(4); 920 open->op_fname.len = be32_to_cpup(p++); 921 READ_BUF(open->op_fname.len); 922 SAVEMEM(open->op_fname.data, open->op_fname.len); 923 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 924 return status; 925 break; 926 case NFS4_OPEN_CLAIM_PREVIOUS: 927 READ_BUF(4); 928 open->op_delegate_type = be32_to_cpup(p++); 929 break; 930 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 931 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 932 if (status) 933 return status; 934 READ_BUF(4); 935 open->op_fname.len = be32_to_cpup(p++); 936 READ_BUF(open->op_fname.len); 937 SAVEMEM(open->op_fname.data, open->op_fname.len); 938 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 939 return status; 940 break; 941 case NFS4_OPEN_CLAIM_FH: 942 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 943 if (argp->minorversion < 1) 944 goto xdr_error; 945 /* void */ 946 break; 947 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 948 if (argp->minorversion < 1) 949 goto xdr_error; 950 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 951 if (status) 952 return status; 953 break; 954 default: 955 goto xdr_error; 956 } 957 958 DECODE_TAIL; 959 } 960 961 static __be32 962 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 963 { 964 DECODE_HEAD; 965 966 if (argp->minorversion >= 1) 967 return nfserr_notsupp; 968 969 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 970 if (status) 971 return status; 972 READ_BUF(4); 973 open_conf->oc_seqid = be32_to_cpup(p++); 974 975 DECODE_TAIL; 976 } 977 978 static __be32 979 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 980 { 981 DECODE_HEAD; 982 983 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 984 if (status) 985 return status; 986 READ_BUF(4); 987 open_down->od_seqid = be32_to_cpup(p++); 988 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 989 &open_down->od_deleg_want, NULL); 990 if (status) 991 return status; 992 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 993 if (status) 994 return status; 995 DECODE_TAIL; 996 } 997 998 static __be32 999 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 1000 { 1001 DECODE_HEAD; 1002 1003 READ_BUF(4); 1004 putfh->pf_fhlen = be32_to_cpup(p++); 1005 if (putfh->pf_fhlen > NFS4_FHSIZE) 1006 goto xdr_error; 1007 READ_BUF(putfh->pf_fhlen); 1008 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 1009 1010 DECODE_TAIL; 1011 } 1012 1013 static __be32 1014 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) 1015 { 1016 if (argp->minorversion == 0) 1017 return nfs_ok; 1018 return nfserr_notsupp; 1019 } 1020 1021 static __be32 1022 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 1023 { 1024 DECODE_HEAD; 1025 1026 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 1027 if (status) 1028 return status; 1029 READ_BUF(12); 1030 p = xdr_decode_hyper(p, &read->rd_offset); 1031 read->rd_length = be32_to_cpup(p++); 1032 1033 DECODE_TAIL; 1034 } 1035 1036 static __be32 1037 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 1038 { 1039 DECODE_HEAD; 1040 1041 READ_BUF(24); 1042 p = xdr_decode_hyper(p, &readdir->rd_cookie); 1043 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 1044 readdir->rd_dircount = be32_to_cpup(p++); 1045 readdir->rd_maxcount = be32_to_cpup(p++); 1046 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 1047 goto out; 1048 1049 DECODE_TAIL; 1050 } 1051 1052 static __be32 1053 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 1054 { 1055 DECODE_HEAD; 1056 1057 READ_BUF(4); 1058 remove->rm_namelen = be32_to_cpup(p++); 1059 READ_BUF(remove->rm_namelen); 1060 SAVEMEM(remove->rm_name, remove->rm_namelen); 1061 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 1062 return status; 1063 1064 DECODE_TAIL; 1065 } 1066 1067 static __be32 1068 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 1069 { 1070 DECODE_HEAD; 1071 1072 READ_BUF(4); 1073 rename->rn_snamelen = be32_to_cpup(p++); 1074 READ_BUF(rename->rn_snamelen + 4); 1075 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1076 rename->rn_tnamelen = be32_to_cpup(p++); 1077 READ_BUF(rename->rn_tnamelen); 1078 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1079 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1080 return status; 1081 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1082 return status; 1083 1084 DECODE_TAIL; 1085 } 1086 1087 static __be32 1088 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1089 { 1090 DECODE_HEAD; 1091 1092 if (argp->minorversion >= 1) 1093 return nfserr_notsupp; 1094 1095 READ_BUF(sizeof(clientid_t)); 1096 COPYMEM(clientid, sizeof(clientid_t)); 1097 1098 DECODE_TAIL; 1099 } 1100 1101 static __be32 1102 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1103 struct nfsd4_secinfo *secinfo) 1104 { 1105 DECODE_HEAD; 1106 1107 READ_BUF(4); 1108 secinfo->si_namelen = be32_to_cpup(p++); 1109 READ_BUF(secinfo->si_namelen); 1110 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1111 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1112 if (status) 1113 return status; 1114 DECODE_TAIL; 1115 } 1116 1117 static __be32 1118 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1119 struct nfsd4_secinfo_no_name *sin) 1120 { 1121 DECODE_HEAD; 1122 1123 READ_BUF(4); 1124 sin->sin_style = be32_to_cpup(p++); 1125 DECODE_TAIL; 1126 } 1127 1128 static __be32 1129 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1130 { 1131 __be32 status; 1132 1133 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1134 if (status) 1135 return status; 1136 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1137 &setattr->sa_acl, &setattr->sa_label); 1138 } 1139 1140 static __be32 1141 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1142 { 1143 DECODE_HEAD; 1144 1145 if (argp->minorversion >= 1) 1146 return nfserr_notsupp; 1147 1148 READ_BUF(NFS4_VERIFIER_SIZE); 1149 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1150 1151 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1152 if (status) 1153 return nfserr_bad_xdr; 1154 READ_BUF(8); 1155 setclientid->se_callback_prog = be32_to_cpup(p++); 1156 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1157 1158 READ_BUF(setclientid->se_callback_netid_len + 4); 1159 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1160 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1161 1162 READ_BUF(setclientid->se_callback_addr_len + 4); 1163 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1164 setclientid->se_callback_ident = be32_to_cpup(p++); 1165 1166 DECODE_TAIL; 1167 } 1168 1169 static __be32 1170 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1171 { 1172 DECODE_HEAD; 1173 1174 if (argp->minorversion >= 1) 1175 return nfserr_notsupp; 1176 1177 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1178 COPYMEM(&scd_c->sc_clientid, 8); 1179 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1180 1181 DECODE_TAIL; 1182 } 1183 1184 /* Also used for NVERIFY */ 1185 static __be32 1186 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1187 { 1188 DECODE_HEAD; 1189 1190 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1191 goto out; 1192 1193 /* For convenience's sake, we compare raw xdr'd attributes in 1194 * nfsd4_proc_verify */ 1195 1196 READ_BUF(4); 1197 verify->ve_attrlen = be32_to_cpup(p++); 1198 READ_BUF(verify->ve_attrlen); 1199 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1200 1201 DECODE_TAIL; 1202 } 1203 1204 static __be32 1205 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1206 { 1207 int avail; 1208 int len; 1209 DECODE_HEAD; 1210 1211 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1212 if (status) 1213 return status; 1214 READ_BUF(16); 1215 p = xdr_decode_hyper(p, &write->wr_offset); 1216 write->wr_stable_how = be32_to_cpup(p++); 1217 if (write->wr_stable_how > 2) 1218 goto xdr_error; 1219 write->wr_buflen = be32_to_cpup(p++); 1220 1221 /* Sorry .. no magic macros for this.. * 1222 * READ_BUF(write->wr_buflen); 1223 * SAVEMEM(write->wr_buf, write->wr_buflen); 1224 */ 1225 avail = (char*)argp->end - (char*)argp->p; 1226 if (avail + argp->pagelen < write->wr_buflen) { 1227 dprintk("NFSD: xdr error (%s:%d)\n", 1228 __FILE__, __LINE__); 1229 goto xdr_error; 1230 } 1231 write->wr_head.iov_base = p; 1232 write->wr_head.iov_len = avail; 1233 write->wr_pagelist = argp->pagelist; 1234 1235 len = XDR_QUADLEN(write->wr_buflen) << 2; 1236 if (len >= avail) { 1237 int pages; 1238 1239 len -= avail; 1240 1241 pages = len >> PAGE_SHIFT; 1242 argp->pagelist += pages; 1243 argp->pagelen -= pages * PAGE_SIZE; 1244 len -= pages * PAGE_SIZE; 1245 1246 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1247 argp->pagelist++; 1248 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1249 } 1250 argp->p += XDR_QUADLEN(len); 1251 1252 DECODE_TAIL; 1253 } 1254 1255 static __be32 1256 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1257 { 1258 DECODE_HEAD; 1259 1260 if (argp->minorversion >= 1) 1261 return nfserr_notsupp; 1262 1263 READ_BUF(12); 1264 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1265 rlockowner->rl_owner.len = be32_to_cpup(p++); 1266 READ_BUF(rlockowner->rl_owner.len); 1267 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1268 1269 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1270 return nfserr_inval; 1271 DECODE_TAIL; 1272 } 1273 1274 static __be32 1275 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1276 struct nfsd4_exchange_id *exid) 1277 { 1278 int dummy, tmp; 1279 DECODE_HEAD; 1280 1281 READ_BUF(NFS4_VERIFIER_SIZE); 1282 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1283 1284 status = nfsd4_decode_opaque(argp, &exid->clname); 1285 if (status) 1286 return nfserr_bad_xdr; 1287 1288 READ_BUF(4); 1289 exid->flags = be32_to_cpup(p++); 1290 1291 /* Ignore state_protect4_a */ 1292 READ_BUF(4); 1293 exid->spa_how = be32_to_cpup(p++); 1294 switch (exid->spa_how) { 1295 case SP4_NONE: 1296 break; 1297 case SP4_MACH_CRED: 1298 /* spo_must_enforce */ 1299 READ_BUF(4); 1300 dummy = be32_to_cpup(p++); 1301 READ_BUF(dummy * 4); 1302 p += dummy; 1303 1304 /* spo_must_allow */ 1305 READ_BUF(4); 1306 dummy = be32_to_cpup(p++); 1307 READ_BUF(dummy * 4); 1308 p += dummy; 1309 break; 1310 case SP4_SSV: 1311 /* ssp_ops */ 1312 READ_BUF(4); 1313 dummy = be32_to_cpup(p++); 1314 READ_BUF(dummy * 4); 1315 p += dummy; 1316 1317 READ_BUF(4); 1318 dummy = be32_to_cpup(p++); 1319 READ_BUF(dummy * 4); 1320 p += dummy; 1321 1322 /* ssp_hash_algs<> */ 1323 READ_BUF(4); 1324 tmp = be32_to_cpup(p++); 1325 while (tmp--) { 1326 READ_BUF(4); 1327 dummy = be32_to_cpup(p++); 1328 READ_BUF(dummy); 1329 p += XDR_QUADLEN(dummy); 1330 } 1331 1332 /* ssp_encr_algs<> */ 1333 READ_BUF(4); 1334 tmp = be32_to_cpup(p++); 1335 while (tmp--) { 1336 READ_BUF(4); 1337 dummy = be32_to_cpup(p++); 1338 READ_BUF(dummy); 1339 p += XDR_QUADLEN(dummy); 1340 } 1341 1342 /* ssp_window and ssp_num_gss_handles */ 1343 READ_BUF(8); 1344 dummy = be32_to_cpup(p++); 1345 dummy = be32_to_cpup(p++); 1346 break; 1347 default: 1348 goto xdr_error; 1349 } 1350 1351 /* Ignore Implementation ID */ 1352 READ_BUF(4); /* nfs_impl_id4 array length */ 1353 dummy = be32_to_cpup(p++); 1354 1355 if (dummy > 1) 1356 goto xdr_error; 1357 1358 if (dummy == 1) { 1359 /* nii_domain */ 1360 READ_BUF(4); 1361 dummy = be32_to_cpup(p++); 1362 READ_BUF(dummy); 1363 p += XDR_QUADLEN(dummy); 1364 1365 /* nii_name */ 1366 READ_BUF(4); 1367 dummy = be32_to_cpup(p++); 1368 READ_BUF(dummy); 1369 p += XDR_QUADLEN(dummy); 1370 1371 /* nii_date */ 1372 READ_BUF(12); 1373 p += 3; 1374 } 1375 DECODE_TAIL; 1376 } 1377 1378 static __be32 1379 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1380 struct nfsd4_create_session *sess) 1381 { 1382 DECODE_HEAD; 1383 u32 dummy; 1384 1385 READ_BUF(16); 1386 COPYMEM(&sess->clientid, 8); 1387 sess->seqid = be32_to_cpup(p++); 1388 sess->flags = be32_to_cpup(p++); 1389 1390 /* Fore channel attrs */ 1391 READ_BUF(28); 1392 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1393 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1394 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1395 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1396 sess->fore_channel.maxops = be32_to_cpup(p++); 1397 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1398 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1399 if (sess->fore_channel.nr_rdma_attrs == 1) { 1400 READ_BUF(4); 1401 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1402 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1403 dprintk("Too many fore channel attr bitmaps!\n"); 1404 goto xdr_error; 1405 } 1406 1407 /* Back channel attrs */ 1408 READ_BUF(28); 1409 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1410 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1411 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1412 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1413 sess->back_channel.maxops = be32_to_cpup(p++); 1414 sess->back_channel.maxreqs = be32_to_cpup(p++); 1415 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1416 if (sess->back_channel.nr_rdma_attrs == 1) { 1417 READ_BUF(4); 1418 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1419 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1420 dprintk("Too many back channel attr bitmaps!\n"); 1421 goto xdr_error; 1422 } 1423 1424 READ_BUF(4); 1425 sess->callback_prog = be32_to_cpup(p++); 1426 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1427 DECODE_TAIL; 1428 } 1429 1430 static __be32 1431 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1432 struct nfsd4_destroy_session *destroy_session) 1433 { 1434 DECODE_HEAD; 1435 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1436 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1437 1438 DECODE_TAIL; 1439 } 1440 1441 static __be32 1442 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1443 struct nfsd4_free_stateid *free_stateid) 1444 { 1445 DECODE_HEAD; 1446 1447 READ_BUF(sizeof(stateid_t)); 1448 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1449 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1450 1451 DECODE_TAIL; 1452 } 1453 1454 static __be32 1455 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1456 struct nfsd4_sequence *seq) 1457 { 1458 DECODE_HEAD; 1459 1460 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1461 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1462 seq->seqid = be32_to_cpup(p++); 1463 seq->slotid = be32_to_cpup(p++); 1464 seq->maxslots = be32_to_cpup(p++); 1465 seq->cachethis = be32_to_cpup(p++); 1466 1467 DECODE_TAIL; 1468 } 1469 1470 static __be32 1471 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1472 { 1473 int i; 1474 __be32 *p, status; 1475 struct nfsd4_test_stateid_id *stateid; 1476 1477 READ_BUF(4); 1478 test_stateid->ts_num_ids = ntohl(*p++); 1479 1480 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1481 1482 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1483 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1484 if (!stateid) { 1485 status = nfserrno(-ENOMEM); 1486 goto out; 1487 } 1488 1489 INIT_LIST_HEAD(&stateid->ts_id_list); 1490 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1491 1492 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1493 if (status) 1494 goto out; 1495 } 1496 1497 status = 0; 1498 out: 1499 return status; 1500 xdr_error: 1501 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1502 status = nfserr_bad_xdr; 1503 goto out; 1504 } 1505 1506 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1507 { 1508 DECODE_HEAD; 1509 1510 READ_BUF(8); 1511 COPYMEM(&dc->clientid, 8); 1512 1513 DECODE_TAIL; 1514 } 1515 1516 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1517 { 1518 DECODE_HEAD; 1519 1520 READ_BUF(4); 1521 rc->rca_one_fs = be32_to_cpup(p++); 1522 1523 DECODE_TAIL; 1524 } 1525 1526 #ifdef CONFIG_NFSD_PNFS 1527 static __be32 1528 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1529 struct nfsd4_getdeviceinfo *gdev) 1530 { 1531 DECODE_HEAD; 1532 u32 num, i; 1533 1534 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1535 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1536 gdev->gd_layout_type = be32_to_cpup(p++); 1537 gdev->gd_maxcount = be32_to_cpup(p++); 1538 num = be32_to_cpup(p++); 1539 if (num) { 1540 READ_BUF(4 * num); 1541 gdev->gd_notify_types = be32_to_cpup(p++); 1542 for (i = 1; i < num; i++) { 1543 if (be32_to_cpup(p++)) { 1544 status = nfserr_inval; 1545 goto out; 1546 } 1547 } 1548 } 1549 DECODE_TAIL; 1550 } 1551 1552 static __be32 1553 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1554 struct nfsd4_layoutget *lgp) 1555 { 1556 DECODE_HEAD; 1557 1558 READ_BUF(36); 1559 lgp->lg_signal = be32_to_cpup(p++); 1560 lgp->lg_layout_type = be32_to_cpup(p++); 1561 lgp->lg_seg.iomode = be32_to_cpup(p++); 1562 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1563 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1564 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1565 nfsd4_decode_stateid(argp, &lgp->lg_sid); 1566 READ_BUF(4); 1567 lgp->lg_maxcount = be32_to_cpup(p++); 1568 1569 DECODE_TAIL; 1570 } 1571 1572 static __be32 1573 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1574 struct nfsd4_layoutcommit *lcp) 1575 { 1576 DECODE_HEAD; 1577 u32 timechange; 1578 1579 READ_BUF(20); 1580 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1581 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1582 lcp->lc_reclaim = be32_to_cpup(p++); 1583 nfsd4_decode_stateid(argp, &lcp->lc_sid); 1584 READ_BUF(4); 1585 lcp->lc_newoffset = be32_to_cpup(p++); 1586 if (lcp->lc_newoffset) { 1587 READ_BUF(8); 1588 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1589 } else 1590 lcp->lc_last_wr = 0; 1591 READ_BUF(4); 1592 timechange = be32_to_cpup(p++); 1593 if (timechange) { 1594 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1595 if (status) 1596 return status; 1597 } else { 1598 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1599 } 1600 READ_BUF(8); 1601 lcp->lc_layout_type = be32_to_cpup(p++); 1602 1603 /* 1604 * Save the layout update in XDR format and let the layout driver deal 1605 * with it later. 1606 */ 1607 lcp->lc_up_len = be32_to_cpup(p++); 1608 if (lcp->lc_up_len > 0) { 1609 READ_BUF(lcp->lc_up_len); 1610 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1611 } 1612 1613 DECODE_TAIL; 1614 } 1615 1616 static __be32 1617 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1618 struct nfsd4_layoutreturn *lrp) 1619 { 1620 DECODE_HEAD; 1621 1622 READ_BUF(16); 1623 lrp->lr_reclaim = be32_to_cpup(p++); 1624 lrp->lr_layout_type = be32_to_cpup(p++); 1625 lrp->lr_seg.iomode = be32_to_cpup(p++); 1626 lrp->lr_return_type = be32_to_cpup(p++); 1627 if (lrp->lr_return_type == RETURN_FILE) { 1628 READ_BUF(16); 1629 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1630 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1631 nfsd4_decode_stateid(argp, &lrp->lr_sid); 1632 READ_BUF(4); 1633 lrp->lrf_body_len = be32_to_cpup(p++); 1634 if (lrp->lrf_body_len > 0) { 1635 READ_BUF(lrp->lrf_body_len); 1636 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1637 } 1638 } else { 1639 lrp->lr_seg.offset = 0; 1640 lrp->lr_seg.length = NFS4_MAX_UINT64; 1641 } 1642 1643 DECODE_TAIL; 1644 } 1645 #endif /* CONFIG_NFSD_PNFS */ 1646 1647 static __be32 1648 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1649 struct nfsd4_fallocate *fallocate) 1650 { 1651 DECODE_HEAD; 1652 1653 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1654 if (status) 1655 return status; 1656 1657 READ_BUF(16); 1658 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1659 xdr_decode_hyper(p, &fallocate->falloc_length); 1660 1661 DECODE_TAIL; 1662 } 1663 1664 static __be32 1665 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1666 { 1667 DECODE_HEAD; 1668 1669 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1670 if (status) 1671 return status; 1672 1673 READ_BUF(8 + 4); 1674 p = xdr_decode_hyper(p, &seek->seek_offset); 1675 seek->seek_whence = be32_to_cpup(p); 1676 1677 DECODE_TAIL; 1678 } 1679 1680 static __be32 1681 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1682 { 1683 return nfs_ok; 1684 } 1685 1686 static __be32 1687 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1688 { 1689 return nfserr_notsupp; 1690 } 1691 1692 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1693 1694 static nfsd4_dec nfsd4_dec_ops[] = { 1695 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1696 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1697 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1698 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1699 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1700 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1701 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1702 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1703 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1704 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1705 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1706 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1707 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1708 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1709 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1710 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1711 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1712 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1713 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1714 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1715 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1716 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1717 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1718 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1719 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1720 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1721 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1722 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1723 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1724 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1725 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1726 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1727 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1728 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1729 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1730 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1731 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1732 1733 /* new operations for NFSv4.1 */ 1734 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1735 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1736 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1737 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1738 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1739 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1740 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1741 #ifdef CONFIG_NFSD_PNFS 1742 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1743 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1744 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1745 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1746 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1747 #else 1748 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1749 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1750 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1751 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1752 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1753 #endif 1754 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1755 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1756 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1757 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1758 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1759 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1760 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1761 1762 /* new operations for NFSv4.2 */ 1763 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1764 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp, 1765 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1766 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1767 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1768 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1769 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1770 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1771 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1772 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1773 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1774 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1775 }; 1776 1777 static inline bool 1778 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1779 { 1780 if (op->opnum < FIRST_NFS4_OP) 1781 return false; 1782 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1783 return false; 1784 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1785 return false; 1786 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1787 return false; 1788 return true; 1789 } 1790 1791 static __be32 1792 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1793 { 1794 DECODE_HEAD; 1795 struct nfsd4_op *op; 1796 bool cachethis = false; 1797 int auth_slack= argp->rqstp->rq_auth_slack; 1798 int max_reply = auth_slack + 8; /* opcnt, status */ 1799 int readcount = 0; 1800 int readbytes = 0; 1801 int i; 1802 1803 READ_BUF(4); 1804 argp->taglen = be32_to_cpup(p++); 1805 READ_BUF(argp->taglen + 8); 1806 SAVEMEM(argp->tag, argp->taglen); 1807 argp->minorversion = be32_to_cpup(p++); 1808 argp->opcnt = be32_to_cpup(p++); 1809 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1810 1811 if (argp->taglen > NFSD4_MAX_TAGLEN) 1812 goto xdr_error; 1813 if (argp->opcnt > 100) 1814 goto xdr_error; 1815 1816 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1817 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1818 if (!argp->ops) { 1819 argp->ops = argp->iops; 1820 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1821 goto xdr_error; 1822 } 1823 } 1824 1825 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1826 argp->opcnt = 0; 1827 1828 for (i = 0; i < argp->opcnt; i++) { 1829 op = &argp->ops[i]; 1830 op->replay = NULL; 1831 1832 READ_BUF(4); 1833 op->opnum = be32_to_cpup(p++); 1834 1835 if (nfsd4_opnum_in_range(argp, op)) 1836 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1837 else { 1838 op->opnum = OP_ILLEGAL; 1839 op->status = nfserr_op_illegal; 1840 } 1841 /* 1842 * We'll try to cache the result in the DRC if any one 1843 * op in the compound wants to be cached: 1844 */ 1845 cachethis |= nfsd4_cache_this_op(op); 1846 1847 if (op->opnum == OP_READ) { 1848 readcount++; 1849 readbytes += nfsd4_max_reply(argp->rqstp, op); 1850 } else 1851 max_reply += nfsd4_max_reply(argp->rqstp, op); 1852 /* 1853 * OP_LOCK may return a conflicting lock. (Special case 1854 * because it will just skip encoding this if it runs 1855 * out of xdr buffer space, and it is the only operation 1856 * that behaves this way.) 1857 */ 1858 if (op->opnum == OP_LOCK) 1859 max_reply += NFS4_OPAQUE_LIMIT; 1860 1861 if (op->status) { 1862 argp->opcnt = i+1; 1863 break; 1864 } 1865 } 1866 /* Sessions make the DRC unnecessary: */ 1867 if (argp->minorversion) 1868 cachethis = false; 1869 svc_reserve(argp->rqstp, max_reply + readbytes); 1870 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1871 1872 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1873 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1874 1875 DECODE_TAIL; 1876 } 1877 1878 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1879 { 1880 if (IS_I_VERSION(inode)) { 1881 p = xdr_encode_hyper(p, inode->i_version); 1882 } else { 1883 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1884 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1885 } 1886 return p; 1887 } 1888 1889 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1890 { 1891 *p++ = cpu_to_be32(c->atomic); 1892 if (c->change_supported) { 1893 p = xdr_encode_hyper(p, c->before_change); 1894 p = xdr_encode_hyper(p, c->after_change); 1895 } else { 1896 *p++ = cpu_to_be32(c->before_ctime_sec); 1897 *p++ = cpu_to_be32(c->before_ctime_nsec); 1898 *p++ = cpu_to_be32(c->after_ctime_sec); 1899 *p++ = cpu_to_be32(c->after_ctime_nsec); 1900 } 1901 return p; 1902 } 1903 1904 /* Encode as an array of strings the string given with components 1905 * separated @sep, escaped with esc_enter and esc_exit. 1906 */ 1907 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1908 char *components, char esc_enter, 1909 char esc_exit) 1910 { 1911 __be32 *p; 1912 __be32 pathlen; 1913 int pathlen_offset; 1914 int strlen, count=0; 1915 char *str, *end, *next; 1916 1917 dprintk("nfsd4_encode_components(%s)\n", components); 1918 1919 pathlen_offset = xdr->buf->len; 1920 p = xdr_reserve_space(xdr, 4); 1921 if (!p) 1922 return nfserr_resource; 1923 p++; /* We will fill this in with @count later */ 1924 1925 end = str = components; 1926 while (*end) { 1927 bool found_esc = false; 1928 1929 /* try to parse as esc_start, ..., esc_end, sep */ 1930 if (*str == esc_enter) { 1931 for (; *end && (*end != esc_exit); end++) 1932 /* find esc_exit or end of string */; 1933 next = end + 1; 1934 if (*end && (!*next || *next == sep)) { 1935 str++; 1936 found_esc = true; 1937 } 1938 } 1939 1940 if (!found_esc) 1941 for (; *end && (*end != sep); end++) 1942 /* find sep or end of string */; 1943 1944 strlen = end - str; 1945 if (strlen) { 1946 p = xdr_reserve_space(xdr, strlen + 4); 1947 if (!p) 1948 return nfserr_resource; 1949 p = xdr_encode_opaque(p, str, strlen); 1950 count++; 1951 } 1952 else 1953 end++; 1954 if (found_esc) 1955 end = next; 1956 1957 str = end; 1958 } 1959 pathlen = htonl(count); 1960 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 1961 return 0; 1962 } 1963 1964 /* Encode as an array of strings the string given with components 1965 * separated @sep. 1966 */ 1967 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 1968 char *components) 1969 { 1970 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 1971 } 1972 1973 /* 1974 * encode a location element of a fs_locations structure 1975 */ 1976 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 1977 struct nfsd4_fs_location *location) 1978 { 1979 __be32 status; 1980 1981 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 1982 '[', ']'); 1983 if (status) 1984 return status; 1985 status = nfsd4_encode_components(xdr, '/', location->path); 1986 if (status) 1987 return status; 1988 return 0; 1989 } 1990 1991 /* 1992 * Encode a path in RFC3530 'pathname4' format 1993 */ 1994 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 1995 const struct path *root, 1996 const struct path *path) 1997 { 1998 struct path cur = *path; 1999 __be32 *p; 2000 struct dentry **components = NULL; 2001 unsigned int ncomponents = 0; 2002 __be32 err = nfserr_jukebox; 2003 2004 dprintk("nfsd4_encode_components("); 2005 2006 path_get(&cur); 2007 /* First walk the path up to the nfsd root, and store the 2008 * dentries/path components in an array. 2009 */ 2010 for (;;) { 2011 if (cur.dentry == root->dentry && cur.mnt == root->mnt) 2012 break; 2013 if (cur.dentry == cur.mnt->mnt_root) { 2014 if (follow_up(&cur)) 2015 continue; 2016 goto out_free; 2017 } 2018 if ((ncomponents & 15) == 0) { 2019 struct dentry **new; 2020 new = krealloc(components, 2021 sizeof(*new) * (ncomponents + 16), 2022 GFP_KERNEL); 2023 if (!new) 2024 goto out_free; 2025 components = new; 2026 } 2027 components[ncomponents++] = cur.dentry; 2028 cur.dentry = dget_parent(cur.dentry); 2029 } 2030 err = nfserr_resource; 2031 p = xdr_reserve_space(xdr, 4); 2032 if (!p) 2033 goto out_free; 2034 *p++ = cpu_to_be32(ncomponents); 2035 2036 while (ncomponents) { 2037 struct dentry *dentry = components[ncomponents - 1]; 2038 unsigned int len; 2039 2040 spin_lock(&dentry->d_lock); 2041 len = dentry->d_name.len; 2042 p = xdr_reserve_space(xdr, len + 4); 2043 if (!p) { 2044 spin_unlock(&dentry->d_lock); 2045 goto out_free; 2046 } 2047 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2048 dprintk("/%pd", dentry); 2049 spin_unlock(&dentry->d_lock); 2050 dput(dentry); 2051 ncomponents--; 2052 } 2053 2054 err = 0; 2055 out_free: 2056 dprintk(")\n"); 2057 while (ncomponents) 2058 dput(components[--ncomponents]); 2059 kfree(components); 2060 path_put(&cur); 2061 return err; 2062 } 2063 2064 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2065 struct svc_rqst *rqstp, const struct path *path) 2066 { 2067 struct svc_export *exp_ps; 2068 __be32 res; 2069 2070 exp_ps = rqst_find_fsidzero_export(rqstp); 2071 if (IS_ERR(exp_ps)) 2072 return nfserrno(PTR_ERR(exp_ps)); 2073 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2074 exp_put(exp_ps); 2075 return res; 2076 } 2077 2078 /* 2079 * encode a fs_locations structure 2080 */ 2081 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2082 struct svc_rqst *rqstp, struct svc_export *exp) 2083 { 2084 __be32 status; 2085 int i; 2086 __be32 *p; 2087 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2088 2089 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2090 if (status) 2091 return status; 2092 p = xdr_reserve_space(xdr, 4); 2093 if (!p) 2094 return nfserr_resource; 2095 *p++ = cpu_to_be32(fslocs->locations_count); 2096 for (i=0; i<fslocs->locations_count; i++) { 2097 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2098 if (status) 2099 return status; 2100 } 2101 return 0; 2102 } 2103 2104 static u32 nfs4_file_type(umode_t mode) 2105 { 2106 switch (mode & S_IFMT) { 2107 case S_IFIFO: return NF4FIFO; 2108 case S_IFCHR: return NF4CHR; 2109 case S_IFDIR: return NF4DIR; 2110 case S_IFBLK: return NF4BLK; 2111 case S_IFLNK: return NF4LNK; 2112 case S_IFREG: return NF4REG; 2113 case S_IFSOCK: return NF4SOCK; 2114 default: return NF4BAD; 2115 }; 2116 } 2117 2118 static inline __be32 2119 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2120 struct nfs4_ace *ace) 2121 { 2122 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2123 return nfs4_acl_write_who(xdr, ace->whotype); 2124 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2125 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2126 else 2127 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2128 } 2129 2130 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2131 FATTR4_WORD0_RDATTR_ERROR) 2132 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2133 2134 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2135 static inline __be32 2136 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2137 void *context, int len) 2138 { 2139 __be32 *p; 2140 2141 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2142 if (!p) 2143 return nfserr_resource; 2144 2145 /* 2146 * For now we use a 0 here to indicate the null translation; in 2147 * the future we may place a call to translation code here. 2148 */ 2149 *p++ = cpu_to_be32(0); /* lfs */ 2150 *p++ = cpu_to_be32(0); /* pi */ 2151 p = xdr_encode_opaque(p, context, len); 2152 return 0; 2153 } 2154 #else 2155 static inline __be32 2156 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2157 void *context, int len) 2158 { return 0; } 2159 #endif 2160 2161 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 2162 { 2163 /* As per referral draft: */ 2164 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2165 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2166 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2167 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2168 *rdattr_err = NFSERR_MOVED; 2169 else 2170 return nfserr_moved; 2171 } 2172 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2173 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2174 return 0; 2175 } 2176 2177 2178 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2179 { 2180 struct path path = exp->ex_path; 2181 int err; 2182 2183 path_get(&path); 2184 while (follow_up(&path)) { 2185 if (path.dentry != path.mnt->mnt_root) 2186 break; 2187 } 2188 err = vfs_getattr(&path, stat); 2189 path_put(&path); 2190 return err; 2191 } 2192 2193 /* 2194 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2195 * ourselves. 2196 */ 2197 static __be32 2198 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2199 struct svc_export *exp, 2200 struct dentry *dentry, u32 *bmval, 2201 struct svc_rqst *rqstp, int ignore_crossmnt) 2202 { 2203 u32 bmval0 = bmval[0]; 2204 u32 bmval1 = bmval[1]; 2205 u32 bmval2 = bmval[2]; 2206 struct kstat stat; 2207 struct svc_fh *tempfh = NULL; 2208 struct kstatfs statfs; 2209 __be32 *p; 2210 int starting_len = xdr->buf->len; 2211 int attrlen_offset; 2212 __be32 attrlen; 2213 u32 dummy; 2214 u64 dummy64; 2215 u32 rdattr_err = 0; 2216 __be32 status; 2217 int err; 2218 int aclsupport = 0; 2219 struct nfs4_acl *acl = NULL; 2220 void *context = NULL; 2221 int contextlen; 2222 bool contextsupport = false; 2223 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2224 u32 minorversion = resp->cstate.minorversion; 2225 struct path path = { 2226 .mnt = exp->ex_path.mnt, 2227 .dentry = dentry, 2228 }; 2229 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2230 2231 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2232 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2233 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2234 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2235 2236 if (exp->ex_fslocs.migrated) { 2237 BUG_ON(bmval[2]); 2238 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 2239 if (status) 2240 goto out; 2241 } 2242 2243 err = vfs_getattr(&path, &stat); 2244 if (err) 2245 goto out_nfserr; 2246 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2247 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2248 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2249 FATTR4_WORD1_SPACE_TOTAL))) { 2250 err = vfs_statfs(&path, &statfs); 2251 if (err) 2252 goto out_nfserr; 2253 } 2254 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2255 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2256 status = nfserr_jukebox; 2257 if (!tempfh) 2258 goto out; 2259 fh_init(tempfh, NFS4_FHSIZE); 2260 status = fh_compose(tempfh, exp, dentry, NULL); 2261 if (status) 2262 goto out; 2263 fhp = tempfh; 2264 } 2265 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 2266 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 2267 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2268 aclsupport = (err == 0); 2269 if (bmval0 & FATTR4_WORD0_ACL) { 2270 if (err == -EOPNOTSUPP) 2271 bmval0 &= ~FATTR4_WORD0_ACL; 2272 else if (err == -EINVAL) { 2273 status = nfserr_attrnotsupp; 2274 goto out; 2275 } else if (err != 0) 2276 goto out_nfserr; 2277 } 2278 } 2279 2280 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2281 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) || 2282 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) { 2283 err = security_inode_getsecctx(dentry->d_inode, 2284 &context, &contextlen); 2285 contextsupport = (err == 0); 2286 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2287 if (err == -EOPNOTSUPP) 2288 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2289 else if (err) 2290 goto out_nfserr; 2291 } 2292 } 2293 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2294 2295 if (bmval2) { 2296 p = xdr_reserve_space(xdr, 16); 2297 if (!p) 2298 goto out_resource; 2299 *p++ = cpu_to_be32(3); 2300 *p++ = cpu_to_be32(bmval0); 2301 *p++ = cpu_to_be32(bmval1); 2302 *p++ = cpu_to_be32(bmval2); 2303 } else if (bmval1) { 2304 p = xdr_reserve_space(xdr, 12); 2305 if (!p) 2306 goto out_resource; 2307 *p++ = cpu_to_be32(2); 2308 *p++ = cpu_to_be32(bmval0); 2309 *p++ = cpu_to_be32(bmval1); 2310 } else { 2311 p = xdr_reserve_space(xdr, 8); 2312 if (!p) 2313 goto out_resource; 2314 *p++ = cpu_to_be32(1); 2315 *p++ = cpu_to_be32(bmval0); 2316 } 2317 2318 attrlen_offset = xdr->buf->len; 2319 p = xdr_reserve_space(xdr, 4); 2320 if (!p) 2321 goto out_resource; 2322 p++; /* to be backfilled later */ 2323 2324 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2325 u32 word0 = nfsd_suppattrs0(minorversion); 2326 u32 word1 = nfsd_suppattrs1(minorversion); 2327 u32 word2 = nfsd_suppattrs2(minorversion); 2328 2329 if (!aclsupport) 2330 word0 &= ~FATTR4_WORD0_ACL; 2331 if (!contextsupport) 2332 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2333 if (!word2) { 2334 p = xdr_reserve_space(xdr, 12); 2335 if (!p) 2336 goto out_resource; 2337 *p++ = cpu_to_be32(2); 2338 *p++ = cpu_to_be32(word0); 2339 *p++ = cpu_to_be32(word1); 2340 } else { 2341 p = xdr_reserve_space(xdr, 16); 2342 if (!p) 2343 goto out_resource; 2344 *p++ = cpu_to_be32(3); 2345 *p++ = cpu_to_be32(word0); 2346 *p++ = cpu_to_be32(word1); 2347 *p++ = cpu_to_be32(word2); 2348 } 2349 } 2350 if (bmval0 & FATTR4_WORD0_TYPE) { 2351 p = xdr_reserve_space(xdr, 4); 2352 if (!p) 2353 goto out_resource; 2354 dummy = nfs4_file_type(stat.mode); 2355 if (dummy == NF4BAD) { 2356 status = nfserr_serverfault; 2357 goto out; 2358 } 2359 *p++ = cpu_to_be32(dummy); 2360 } 2361 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2362 p = xdr_reserve_space(xdr, 4); 2363 if (!p) 2364 goto out_resource; 2365 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2366 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2367 else 2368 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2369 NFS4_FH_VOL_RENAME); 2370 } 2371 if (bmval0 & FATTR4_WORD0_CHANGE) { 2372 p = xdr_reserve_space(xdr, 8); 2373 if (!p) 2374 goto out_resource; 2375 p = encode_change(p, &stat, dentry->d_inode); 2376 } 2377 if (bmval0 & FATTR4_WORD0_SIZE) { 2378 p = xdr_reserve_space(xdr, 8); 2379 if (!p) 2380 goto out_resource; 2381 p = xdr_encode_hyper(p, stat.size); 2382 } 2383 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2384 p = xdr_reserve_space(xdr, 4); 2385 if (!p) 2386 goto out_resource; 2387 *p++ = cpu_to_be32(1); 2388 } 2389 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2390 p = xdr_reserve_space(xdr, 4); 2391 if (!p) 2392 goto out_resource; 2393 *p++ = cpu_to_be32(1); 2394 } 2395 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2396 p = xdr_reserve_space(xdr, 4); 2397 if (!p) 2398 goto out_resource; 2399 *p++ = cpu_to_be32(0); 2400 } 2401 if (bmval0 & FATTR4_WORD0_FSID) { 2402 p = xdr_reserve_space(xdr, 16); 2403 if (!p) 2404 goto out_resource; 2405 if (exp->ex_fslocs.migrated) { 2406 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2407 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2408 } else switch(fsid_source(fhp)) { 2409 case FSIDSOURCE_FSID: 2410 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2411 p = xdr_encode_hyper(p, (u64)0); 2412 break; 2413 case FSIDSOURCE_DEV: 2414 *p++ = cpu_to_be32(0); 2415 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2416 *p++ = cpu_to_be32(0); 2417 *p++ = cpu_to_be32(MINOR(stat.dev)); 2418 break; 2419 case FSIDSOURCE_UUID: 2420 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2421 EX_UUID_LEN); 2422 break; 2423 } 2424 } 2425 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2426 p = xdr_reserve_space(xdr, 4); 2427 if (!p) 2428 goto out_resource; 2429 *p++ = cpu_to_be32(0); 2430 } 2431 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2432 p = xdr_reserve_space(xdr, 4); 2433 if (!p) 2434 goto out_resource; 2435 *p++ = cpu_to_be32(nn->nfsd4_lease); 2436 } 2437 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2438 p = xdr_reserve_space(xdr, 4); 2439 if (!p) 2440 goto out_resource; 2441 *p++ = cpu_to_be32(rdattr_err); 2442 } 2443 if (bmval0 & FATTR4_WORD0_ACL) { 2444 struct nfs4_ace *ace; 2445 2446 if (acl == NULL) { 2447 p = xdr_reserve_space(xdr, 4); 2448 if (!p) 2449 goto out_resource; 2450 2451 *p++ = cpu_to_be32(0); 2452 goto out_acl; 2453 } 2454 p = xdr_reserve_space(xdr, 4); 2455 if (!p) 2456 goto out_resource; 2457 *p++ = cpu_to_be32(acl->naces); 2458 2459 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2460 p = xdr_reserve_space(xdr, 4*3); 2461 if (!p) 2462 goto out_resource; 2463 *p++ = cpu_to_be32(ace->type); 2464 *p++ = cpu_to_be32(ace->flag); 2465 *p++ = cpu_to_be32(ace->access_mask & 2466 NFS4_ACE_MASK_ALL); 2467 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2468 if (status) 2469 goto out; 2470 } 2471 } 2472 out_acl: 2473 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2474 p = xdr_reserve_space(xdr, 4); 2475 if (!p) 2476 goto out_resource; 2477 *p++ = cpu_to_be32(aclsupport ? 2478 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2479 } 2480 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2481 p = xdr_reserve_space(xdr, 4); 2482 if (!p) 2483 goto out_resource; 2484 *p++ = cpu_to_be32(1); 2485 } 2486 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2487 p = xdr_reserve_space(xdr, 4); 2488 if (!p) 2489 goto out_resource; 2490 *p++ = cpu_to_be32(0); 2491 } 2492 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2493 p = xdr_reserve_space(xdr, 4); 2494 if (!p) 2495 goto out_resource; 2496 *p++ = cpu_to_be32(1); 2497 } 2498 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2499 p = xdr_reserve_space(xdr, 4); 2500 if (!p) 2501 goto out_resource; 2502 *p++ = cpu_to_be32(1); 2503 } 2504 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2505 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2506 if (!p) 2507 goto out_resource; 2508 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2509 fhp->fh_handle.fh_size); 2510 } 2511 if (bmval0 & FATTR4_WORD0_FILEID) { 2512 p = xdr_reserve_space(xdr, 8); 2513 if (!p) 2514 goto out_resource; 2515 p = xdr_encode_hyper(p, stat.ino); 2516 } 2517 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2518 p = xdr_reserve_space(xdr, 8); 2519 if (!p) 2520 goto out_resource; 2521 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2522 } 2523 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2524 p = xdr_reserve_space(xdr, 8); 2525 if (!p) 2526 goto out_resource; 2527 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2528 } 2529 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2530 p = xdr_reserve_space(xdr, 8); 2531 if (!p) 2532 goto out_resource; 2533 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2534 } 2535 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2536 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2537 if (status) 2538 goto out; 2539 } 2540 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2541 p = xdr_reserve_space(xdr, 4); 2542 if (!p) 2543 goto out_resource; 2544 *p++ = cpu_to_be32(1); 2545 } 2546 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2547 p = xdr_reserve_space(xdr, 8); 2548 if (!p) 2549 goto out_resource; 2550 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2551 } 2552 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2553 p = xdr_reserve_space(xdr, 4); 2554 if (!p) 2555 goto out_resource; 2556 *p++ = cpu_to_be32(255); 2557 } 2558 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2559 p = xdr_reserve_space(xdr, 4); 2560 if (!p) 2561 goto out_resource; 2562 *p++ = cpu_to_be32(statfs.f_namelen); 2563 } 2564 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2565 p = xdr_reserve_space(xdr, 8); 2566 if (!p) 2567 goto out_resource; 2568 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2569 } 2570 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2571 p = xdr_reserve_space(xdr, 8); 2572 if (!p) 2573 goto out_resource; 2574 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2575 } 2576 if (bmval1 & FATTR4_WORD1_MODE) { 2577 p = xdr_reserve_space(xdr, 4); 2578 if (!p) 2579 goto out_resource; 2580 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2581 } 2582 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2583 p = xdr_reserve_space(xdr, 4); 2584 if (!p) 2585 goto out_resource; 2586 *p++ = cpu_to_be32(1); 2587 } 2588 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2589 p = xdr_reserve_space(xdr, 4); 2590 if (!p) 2591 goto out_resource; 2592 *p++ = cpu_to_be32(stat.nlink); 2593 } 2594 if (bmval1 & FATTR4_WORD1_OWNER) { 2595 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2596 if (status) 2597 goto out; 2598 } 2599 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2600 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2601 if (status) 2602 goto out; 2603 } 2604 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2605 p = xdr_reserve_space(xdr, 8); 2606 if (!p) 2607 goto out_resource; 2608 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2609 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2610 } 2611 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2612 p = xdr_reserve_space(xdr, 8); 2613 if (!p) 2614 goto out_resource; 2615 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2616 p = xdr_encode_hyper(p, dummy64); 2617 } 2618 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2619 p = xdr_reserve_space(xdr, 8); 2620 if (!p) 2621 goto out_resource; 2622 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2623 p = xdr_encode_hyper(p, dummy64); 2624 } 2625 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2626 p = xdr_reserve_space(xdr, 8); 2627 if (!p) 2628 goto out_resource; 2629 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2630 p = xdr_encode_hyper(p, dummy64); 2631 } 2632 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2633 p = xdr_reserve_space(xdr, 8); 2634 if (!p) 2635 goto out_resource; 2636 dummy64 = (u64)stat.blocks << 9; 2637 p = xdr_encode_hyper(p, dummy64); 2638 } 2639 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2640 p = xdr_reserve_space(xdr, 12); 2641 if (!p) 2642 goto out_resource; 2643 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2644 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2645 } 2646 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2647 p = xdr_reserve_space(xdr, 12); 2648 if (!p) 2649 goto out_resource; 2650 *p++ = cpu_to_be32(0); 2651 *p++ = cpu_to_be32(1); 2652 *p++ = cpu_to_be32(0); 2653 } 2654 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2655 p = xdr_reserve_space(xdr, 12); 2656 if (!p) 2657 goto out_resource; 2658 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2659 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2660 } 2661 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2662 p = xdr_reserve_space(xdr, 12); 2663 if (!p) 2664 goto out_resource; 2665 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2666 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2667 } 2668 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2669 p = xdr_reserve_space(xdr, 8); 2670 if (!p) 2671 goto out_resource; 2672 /* 2673 * Get parent's attributes if not ignoring crossmount 2674 * and this is the root of a cross-mounted filesystem. 2675 */ 2676 if (ignore_crossmnt == 0 && 2677 dentry == exp->ex_path.mnt->mnt_root) 2678 get_parent_attributes(exp, &stat); 2679 p = xdr_encode_hyper(p, stat.ino); 2680 } 2681 #ifdef CONFIG_NFSD_PNFS 2682 if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) || 2683 (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) { 2684 if (exp->ex_layout_type) { 2685 p = xdr_reserve_space(xdr, 8); 2686 if (!p) 2687 goto out_resource; 2688 *p++ = cpu_to_be32(1); 2689 *p++ = cpu_to_be32(exp->ex_layout_type); 2690 } else { 2691 p = xdr_reserve_space(xdr, 4); 2692 if (!p) 2693 goto out_resource; 2694 *p++ = cpu_to_be32(0); 2695 } 2696 } 2697 2698 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2699 p = xdr_reserve_space(xdr, 4); 2700 if (!p) 2701 goto out_resource; 2702 *p++ = cpu_to_be32(stat.blksize); 2703 } 2704 #endif /* CONFIG_NFSD_PNFS */ 2705 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2706 status = nfsd4_encode_security_label(xdr, rqstp, context, 2707 contextlen); 2708 if (status) 2709 goto out; 2710 } 2711 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2712 p = xdr_reserve_space(xdr, 16); 2713 if (!p) 2714 goto out_resource; 2715 *p++ = cpu_to_be32(3); 2716 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2717 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2718 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2719 } 2720 2721 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2722 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2723 status = nfs_ok; 2724 2725 out: 2726 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2727 if (context) 2728 security_release_secctx(context, contextlen); 2729 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2730 kfree(acl); 2731 if (tempfh) { 2732 fh_put(tempfh); 2733 kfree(tempfh); 2734 } 2735 if (status) 2736 xdr_truncate_encode(xdr, starting_len); 2737 return status; 2738 out_nfserr: 2739 status = nfserrno(err); 2740 goto out; 2741 out_resource: 2742 status = nfserr_resource; 2743 goto out; 2744 } 2745 2746 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2747 struct xdr_buf *buf, __be32 *p, int bytes) 2748 { 2749 xdr->scratch.iov_len = 0; 2750 memset(buf, 0, sizeof(struct xdr_buf)); 2751 buf->head[0].iov_base = p; 2752 buf->head[0].iov_len = 0; 2753 buf->len = 0; 2754 xdr->buf = buf; 2755 xdr->iov = buf->head; 2756 xdr->p = p; 2757 xdr->end = (void *)p + bytes; 2758 buf->buflen = bytes; 2759 } 2760 2761 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2762 struct svc_fh *fhp, struct svc_export *exp, 2763 struct dentry *dentry, u32 *bmval, 2764 struct svc_rqst *rqstp, int ignore_crossmnt) 2765 { 2766 struct xdr_buf dummy; 2767 struct xdr_stream xdr; 2768 __be32 ret; 2769 2770 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2771 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2772 ignore_crossmnt); 2773 *p = xdr.p; 2774 return ret; 2775 } 2776 2777 static inline int attributes_need_mount(u32 *bmval) 2778 { 2779 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2780 return 1; 2781 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2782 return 1; 2783 return 0; 2784 } 2785 2786 static __be32 2787 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2788 const char *name, int namlen) 2789 { 2790 struct svc_export *exp = cd->rd_fhp->fh_export; 2791 struct dentry *dentry; 2792 __be32 nfserr; 2793 int ignore_crossmnt = 0; 2794 2795 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2796 if (IS_ERR(dentry)) 2797 return nfserrno(PTR_ERR(dentry)); 2798 if (!dentry->d_inode) { 2799 /* 2800 * nfsd_buffered_readdir drops the i_mutex between 2801 * readdir and calling this callback, leaving a window 2802 * where this directory entry could have gone away. 2803 */ 2804 dput(dentry); 2805 return nfserr_noent; 2806 } 2807 2808 exp_get(exp); 2809 /* 2810 * In the case of a mountpoint, the client may be asking for 2811 * attributes that are only properties of the underlying filesystem 2812 * as opposed to the cross-mounted file system. In such a case, 2813 * we will not follow the cross mount and will fill the attribtutes 2814 * directly from the mountpoint dentry. 2815 */ 2816 if (nfsd_mountpoint(dentry, exp)) { 2817 int err; 2818 2819 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2820 && !attributes_need_mount(cd->rd_bmval)) { 2821 ignore_crossmnt = 1; 2822 goto out_encode; 2823 } 2824 /* 2825 * Why the heck aren't we just using nfsd_lookup?? 2826 * Different "."/".." handling? Something else? 2827 * At least, add a comment here to explain.... 2828 */ 2829 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2830 if (err) { 2831 nfserr = nfserrno(err); 2832 goto out_put; 2833 } 2834 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2835 if (nfserr) 2836 goto out_put; 2837 2838 } 2839 out_encode: 2840 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2841 cd->rd_rqstp, ignore_crossmnt); 2842 out_put: 2843 dput(dentry); 2844 exp_put(exp); 2845 return nfserr; 2846 } 2847 2848 static __be32 * 2849 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2850 { 2851 __be32 *p; 2852 2853 p = xdr_reserve_space(xdr, 20); 2854 if (!p) 2855 return NULL; 2856 *p++ = htonl(2); 2857 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2858 *p++ = htonl(0); /* bmval1 */ 2859 2860 *p++ = htonl(4); /* attribute length */ 2861 *p++ = nfserr; /* no htonl */ 2862 return p; 2863 } 2864 2865 static int 2866 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2867 loff_t offset, u64 ino, unsigned int d_type) 2868 { 2869 struct readdir_cd *ccd = ccdv; 2870 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2871 struct xdr_stream *xdr = cd->xdr; 2872 int start_offset = xdr->buf->len; 2873 int cookie_offset; 2874 u32 name_and_cookie; 2875 int entry_bytes; 2876 __be32 nfserr = nfserr_toosmall; 2877 __be64 wire_offset; 2878 __be32 *p; 2879 2880 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2881 if (name && isdotent(name, namlen)) { 2882 cd->common.err = nfs_ok; 2883 return 0; 2884 } 2885 2886 if (cd->cookie_offset) { 2887 wire_offset = cpu_to_be64(offset); 2888 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2889 &wire_offset, 8); 2890 } 2891 2892 p = xdr_reserve_space(xdr, 4); 2893 if (!p) 2894 goto fail; 2895 *p++ = xdr_one; /* mark entry present */ 2896 cookie_offset = xdr->buf->len; 2897 p = xdr_reserve_space(xdr, 3*4 + namlen); 2898 if (!p) 2899 goto fail; 2900 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2901 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2902 2903 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2904 switch (nfserr) { 2905 case nfs_ok: 2906 break; 2907 case nfserr_resource: 2908 nfserr = nfserr_toosmall; 2909 goto fail; 2910 case nfserr_noent: 2911 xdr_truncate_encode(xdr, start_offset); 2912 goto skip_entry; 2913 default: 2914 /* 2915 * If the client requested the RDATTR_ERROR attribute, 2916 * we stuff the error code into this attribute 2917 * and continue. If this attribute was not requested, 2918 * then in accordance with the spec, we fail the 2919 * entire READDIR operation(!) 2920 */ 2921 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2922 goto fail; 2923 p = nfsd4_encode_rdattr_error(xdr, nfserr); 2924 if (p == NULL) { 2925 nfserr = nfserr_toosmall; 2926 goto fail; 2927 } 2928 } 2929 nfserr = nfserr_toosmall; 2930 entry_bytes = xdr->buf->len - start_offset; 2931 if (entry_bytes > cd->rd_maxcount) 2932 goto fail; 2933 cd->rd_maxcount -= entry_bytes; 2934 /* 2935 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 2936 * let's always let through the first entry, at least: 2937 */ 2938 if (!cd->rd_dircount) 2939 goto fail; 2940 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 2941 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 2942 goto fail; 2943 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 2944 2945 cd->cookie_offset = cookie_offset; 2946 skip_entry: 2947 cd->common.err = nfs_ok; 2948 return 0; 2949 fail: 2950 xdr_truncate_encode(xdr, start_offset); 2951 cd->common.err = nfserr; 2952 return -EINVAL; 2953 } 2954 2955 static __be32 2956 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 2957 { 2958 __be32 *p; 2959 2960 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 2961 if (!p) 2962 return nfserr_resource; 2963 *p++ = cpu_to_be32(sid->si_generation); 2964 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 2965 sizeof(stateid_opaque_t)); 2966 return 0; 2967 } 2968 2969 static __be32 2970 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2971 { 2972 struct xdr_stream *xdr = &resp->xdr; 2973 __be32 *p; 2974 2975 if (!nfserr) { 2976 p = xdr_reserve_space(xdr, 8); 2977 if (!p) 2978 return nfserr_resource; 2979 *p++ = cpu_to_be32(access->ac_supported); 2980 *p++ = cpu_to_be32(access->ac_resp_access); 2981 } 2982 return nfserr; 2983 } 2984 2985 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2986 { 2987 struct xdr_stream *xdr = &resp->xdr; 2988 __be32 *p; 2989 2990 if (!nfserr) { 2991 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 2992 if (!p) 2993 return nfserr_resource; 2994 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 2995 NFS4_MAX_SESSIONID_LEN); 2996 *p++ = cpu_to_be32(bcts->dir); 2997 /* Sorry, we do not yet support RDMA over 4.1: */ 2998 *p++ = cpu_to_be32(0); 2999 } 3000 return nfserr; 3001 } 3002 3003 static __be32 3004 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3005 { 3006 struct xdr_stream *xdr = &resp->xdr; 3007 3008 if (!nfserr) 3009 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3010 3011 return nfserr; 3012 } 3013 3014 3015 static __be32 3016 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3017 { 3018 struct xdr_stream *xdr = &resp->xdr; 3019 __be32 *p; 3020 3021 if (!nfserr) { 3022 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3023 if (!p) 3024 return nfserr_resource; 3025 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3026 NFS4_VERIFIER_SIZE); 3027 } 3028 return nfserr; 3029 } 3030 3031 static __be32 3032 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3033 { 3034 struct xdr_stream *xdr = &resp->xdr; 3035 __be32 *p; 3036 3037 if (!nfserr) { 3038 p = xdr_reserve_space(xdr, 32); 3039 if (!p) 3040 return nfserr_resource; 3041 p = encode_cinfo(p, &create->cr_cinfo); 3042 *p++ = cpu_to_be32(2); 3043 *p++ = cpu_to_be32(create->cr_bmval[0]); 3044 *p++ = cpu_to_be32(create->cr_bmval[1]); 3045 } 3046 return nfserr; 3047 } 3048 3049 static __be32 3050 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3051 { 3052 struct svc_fh *fhp = getattr->ga_fhp; 3053 struct xdr_stream *xdr = &resp->xdr; 3054 3055 if (nfserr) 3056 return nfserr; 3057 3058 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3059 getattr->ga_bmval, 3060 resp->rqstp, 0); 3061 return nfserr; 3062 } 3063 3064 static __be32 3065 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3066 { 3067 struct xdr_stream *xdr = &resp->xdr; 3068 struct svc_fh *fhp = *fhpp; 3069 unsigned int len; 3070 __be32 *p; 3071 3072 if (!nfserr) { 3073 len = fhp->fh_handle.fh_size; 3074 p = xdr_reserve_space(xdr, len + 4); 3075 if (!p) 3076 return nfserr_resource; 3077 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3078 } 3079 return nfserr; 3080 } 3081 3082 /* 3083 * Including all fields other than the name, a LOCK4denied structure requires 3084 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3085 */ 3086 static __be32 3087 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3088 { 3089 struct xdr_netobj *conf = &ld->ld_owner; 3090 __be32 *p; 3091 3092 again: 3093 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3094 if (!p) { 3095 /* 3096 * Don't fail to return the result just because we can't 3097 * return the conflicting open: 3098 */ 3099 if (conf->len) { 3100 kfree(conf->data); 3101 conf->len = 0; 3102 conf->data = NULL; 3103 goto again; 3104 } 3105 return nfserr_resource; 3106 } 3107 p = xdr_encode_hyper(p, ld->ld_start); 3108 p = xdr_encode_hyper(p, ld->ld_length); 3109 *p++ = cpu_to_be32(ld->ld_type); 3110 if (conf->len) { 3111 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3112 p = xdr_encode_opaque(p, conf->data, conf->len); 3113 kfree(conf->data); 3114 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3115 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3116 *p++ = cpu_to_be32(0); /* length of owner name */ 3117 } 3118 return nfserr_denied; 3119 } 3120 3121 static __be32 3122 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3123 { 3124 struct xdr_stream *xdr = &resp->xdr; 3125 3126 if (!nfserr) 3127 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3128 else if (nfserr == nfserr_denied) 3129 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3130 3131 return nfserr; 3132 } 3133 3134 static __be32 3135 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3136 { 3137 struct xdr_stream *xdr = &resp->xdr; 3138 3139 if (nfserr == nfserr_denied) 3140 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3141 return nfserr; 3142 } 3143 3144 static __be32 3145 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3146 { 3147 struct xdr_stream *xdr = &resp->xdr; 3148 3149 if (!nfserr) 3150 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3151 3152 return nfserr; 3153 } 3154 3155 3156 static __be32 3157 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3158 { 3159 struct xdr_stream *xdr = &resp->xdr; 3160 __be32 *p; 3161 3162 if (!nfserr) { 3163 p = xdr_reserve_space(xdr, 20); 3164 if (!p) 3165 return nfserr_resource; 3166 p = encode_cinfo(p, &link->li_cinfo); 3167 } 3168 return nfserr; 3169 } 3170 3171 3172 static __be32 3173 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3174 { 3175 struct xdr_stream *xdr = &resp->xdr; 3176 __be32 *p; 3177 3178 if (nfserr) 3179 goto out; 3180 3181 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3182 if (nfserr) 3183 goto out; 3184 p = xdr_reserve_space(xdr, 40); 3185 if (!p) 3186 return nfserr_resource; 3187 p = encode_cinfo(p, &open->op_cinfo); 3188 *p++ = cpu_to_be32(open->op_rflags); 3189 *p++ = cpu_to_be32(2); 3190 *p++ = cpu_to_be32(open->op_bmval[0]); 3191 *p++ = cpu_to_be32(open->op_bmval[1]); 3192 *p++ = cpu_to_be32(open->op_delegate_type); 3193 3194 switch (open->op_delegate_type) { 3195 case NFS4_OPEN_DELEGATE_NONE: 3196 break; 3197 case NFS4_OPEN_DELEGATE_READ: 3198 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3199 if (nfserr) 3200 return nfserr; 3201 p = xdr_reserve_space(xdr, 20); 3202 if (!p) 3203 return nfserr_resource; 3204 *p++ = cpu_to_be32(open->op_recall); 3205 3206 /* 3207 * TODO: ACE's in delegations 3208 */ 3209 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3210 *p++ = cpu_to_be32(0); 3211 *p++ = cpu_to_be32(0); 3212 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3213 break; 3214 case NFS4_OPEN_DELEGATE_WRITE: 3215 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3216 if (nfserr) 3217 return nfserr; 3218 p = xdr_reserve_space(xdr, 32); 3219 if (!p) 3220 return nfserr_resource; 3221 *p++ = cpu_to_be32(0); 3222 3223 /* 3224 * TODO: space_limit's in delegations 3225 */ 3226 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3227 *p++ = cpu_to_be32(~(u32)0); 3228 *p++ = cpu_to_be32(~(u32)0); 3229 3230 /* 3231 * TODO: ACE's in delegations 3232 */ 3233 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3234 *p++ = cpu_to_be32(0); 3235 *p++ = cpu_to_be32(0); 3236 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3237 break; 3238 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3239 switch (open->op_why_no_deleg) { 3240 case WND4_CONTENTION: 3241 case WND4_RESOURCE: 3242 p = xdr_reserve_space(xdr, 8); 3243 if (!p) 3244 return nfserr_resource; 3245 *p++ = cpu_to_be32(open->op_why_no_deleg); 3246 /* deleg signaling not supported yet: */ 3247 *p++ = cpu_to_be32(0); 3248 break; 3249 default: 3250 p = xdr_reserve_space(xdr, 4); 3251 if (!p) 3252 return nfserr_resource; 3253 *p++ = cpu_to_be32(open->op_why_no_deleg); 3254 } 3255 break; 3256 default: 3257 BUG(); 3258 } 3259 /* XXX save filehandle here */ 3260 out: 3261 return nfserr; 3262 } 3263 3264 static __be32 3265 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3266 { 3267 struct xdr_stream *xdr = &resp->xdr; 3268 3269 if (!nfserr) 3270 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3271 3272 return nfserr; 3273 } 3274 3275 static __be32 3276 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3277 { 3278 struct xdr_stream *xdr = &resp->xdr; 3279 3280 if (!nfserr) 3281 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3282 3283 return nfserr; 3284 } 3285 3286 static __be32 nfsd4_encode_splice_read( 3287 struct nfsd4_compoundres *resp, 3288 struct nfsd4_read *read, 3289 struct file *file, unsigned long maxcount) 3290 { 3291 struct xdr_stream *xdr = &resp->xdr; 3292 struct xdr_buf *buf = xdr->buf; 3293 u32 eof; 3294 int space_left; 3295 __be32 nfserr; 3296 __be32 *p = xdr->p - 2; 3297 3298 /* Make sure there will be room for padding if needed */ 3299 if (xdr->end - xdr->p < 1) 3300 return nfserr_resource; 3301 3302 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3303 read->rd_offset, &maxcount); 3304 if (nfserr) { 3305 /* 3306 * nfsd_splice_actor may have already messed with the 3307 * page length; reset it so as not to confuse 3308 * xdr_truncate_encode: 3309 */ 3310 buf->page_len = 0; 3311 return nfserr; 3312 } 3313 3314 eof = (read->rd_offset + maxcount >= 3315 read->rd_fhp->fh_dentry->d_inode->i_size); 3316 3317 *(p++) = htonl(eof); 3318 *(p++) = htonl(maxcount); 3319 3320 buf->page_len = maxcount; 3321 buf->len += maxcount; 3322 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3323 / PAGE_SIZE; 3324 3325 /* Use rest of head for padding and remaining ops: */ 3326 buf->tail[0].iov_base = xdr->p; 3327 buf->tail[0].iov_len = 0; 3328 xdr->iov = buf->tail; 3329 if (maxcount&3) { 3330 int pad = 4 - (maxcount&3); 3331 3332 *(xdr->p++) = 0; 3333 3334 buf->tail[0].iov_base += maxcount&3; 3335 buf->tail[0].iov_len = pad; 3336 buf->len += pad; 3337 } 3338 3339 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3340 buf->buflen - buf->len); 3341 buf->buflen = buf->len + space_left; 3342 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3343 3344 return 0; 3345 } 3346 3347 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3348 struct nfsd4_read *read, 3349 struct file *file, unsigned long maxcount) 3350 { 3351 struct xdr_stream *xdr = &resp->xdr; 3352 u32 eof; 3353 int v; 3354 int starting_len = xdr->buf->len - 8; 3355 long len; 3356 int thislen; 3357 __be32 nfserr; 3358 __be32 tmp; 3359 __be32 *p; 3360 u32 zzz = 0; 3361 int pad; 3362 3363 len = maxcount; 3364 v = 0; 3365 3366 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3367 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3368 WARN_ON_ONCE(!p); 3369 resp->rqstp->rq_vec[v].iov_base = p; 3370 resp->rqstp->rq_vec[v].iov_len = thislen; 3371 v++; 3372 len -= thislen; 3373 3374 while (len) { 3375 thislen = min_t(long, len, PAGE_SIZE); 3376 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3377 WARN_ON_ONCE(!p); 3378 resp->rqstp->rq_vec[v].iov_base = p; 3379 resp->rqstp->rq_vec[v].iov_len = thislen; 3380 v++; 3381 len -= thislen; 3382 } 3383 read->rd_vlen = v; 3384 3385 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3386 read->rd_vlen, &maxcount); 3387 if (nfserr) 3388 return nfserr; 3389 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3390 3391 eof = (read->rd_offset + maxcount >= 3392 read->rd_fhp->fh_dentry->d_inode->i_size); 3393 3394 tmp = htonl(eof); 3395 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3396 tmp = htonl(maxcount); 3397 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3398 3399 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3400 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3401 &zzz, pad); 3402 return 0; 3403 3404 } 3405 3406 static __be32 3407 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3408 struct nfsd4_read *read) 3409 { 3410 unsigned long maxcount; 3411 struct xdr_stream *xdr = &resp->xdr; 3412 struct file *file = read->rd_filp; 3413 int starting_len = xdr->buf->len; 3414 struct raparms *ra; 3415 __be32 *p; 3416 __be32 err; 3417 3418 if (nfserr) 3419 return nfserr; 3420 3421 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3422 if (!p) { 3423 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3424 return nfserr_resource; 3425 } 3426 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3427 WARN_ON_ONCE(1); 3428 return nfserr_resource; 3429 } 3430 xdr_commit_encode(xdr); 3431 3432 maxcount = svc_max_payload(resp->rqstp); 3433 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len)); 3434 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3435 3436 if (!read->rd_filp) { 3437 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp, 3438 &file, &ra); 3439 if (err) 3440 goto err_truncate; 3441 } 3442 3443 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3444 err = nfsd4_encode_splice_read(resp, read, file, maxcount); 3445 else 3446 err = nfsd4_encode_readv(resp, read, file, maxcount); 3447 3448 if (!read->rd_filp) 3449 nfsd_put_tmp_read_open(file, ra); 3450 3451 err_truncate: 3452 if (err) 3453 xdr_truncate_encode(xdr, starting_len); 3454 return err; 3455 } 3456 3457 static __be32 3458 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3459 { 3460 int maxcount; 3461 __be32 wire_count; 3462 int zero = 0; 3463 struct xdr_stream *xdr = &resp->xdr; 3464 int length_offset = xdr->buf->len; 3465 __be32 *p; 3466 3467 if (nfserr) 3468 return nfserr; 3469 3470 p = xdr_reserve_space(xdr, 4); 3471 if (!p) 3472 return nfserr_resource; 3473 maxcount = PAGE_SIZE; 3474 3475 p = xdr_reserve_space(xdr, maxcount); 3476 if (!p) 3477 return nfserr_resource; 3478 /* 3479 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3480 * if they would overflow the buffer. Is this kosher in NFSv4? If 3481 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3482 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3483 */ 3484 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3485 (char *)p, &maxcount); 3486 if (nfserr == nfserr_isdir) 3487 nfserr = nfserr_inval; 3488 if (nfserr) { 3489 xdr_truncate_encode(xdr, length_offset); 3490 return nfserr; 3491 } 3492 3493 wire_count = htonl(maxcount); 3494 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3495 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3496 if (maxcount & 3) 3497 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3498 &zero, 4 - (maxcount&3)); 3499 return 0; 3500 } 3501 3502 static __be32 3503 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3504 { 3505 int maxcount; 3506 int bytes_left; 3507 loff_t offset; 3508 __be64 wire_offset; 3509 struct xdr_stream *xdr = &resp->xdr; 3510 int starting_len = xdr->buf->len; 3511 __be32 *p; 3512 3513 if (nfserr) 3514 return nfserr; 3515 3516 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3517 if (!p) 3518 return nfserr_resource; 3519 3520 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3521 *p++ = cpu_to_be32(0); 3522 *p++ = cpu_to_be32(0); 3523 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3524 - (char *)resp->xdr.buf->head[0].iov_base; 3525 3526 /* 3527 * Number of bytes left for directory entries allowing for the 3528 * final 8 bytes of the readdir and a following failed op: 3529 */ 3530 bytes_left = xdr->buf->buflen - xdr->buf->len 3531 - COMPOUND_ERR_SLACK_SPACE - 8; 3532 if (bytes_left < 0) { 3533 nfserr = nfserr_resource; 3534 goto err_no_verf; 3535 } 3536 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3537 /* 3538 * Note the rfc defines rd_maxcount as the size of the 3539 * READDIR4resok structure, which includes the verifier above 3540 * and the 8 bytes encoded at the end of this function: 3541 */ 3542 if (maxcount < 16) { 3543 nfserr = nfserr_toosmall; 3544 goto err_no_verf; 3545 } 3546 maxcount = min_t(int, maxcount-16, bytes_left); 3547 3548 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3549 if (!readdir->rd_dircount) 3550 readdir->rd_dircount = INT_MAX; 3551 3552 readdir->xdr = xdr; 3553 readdir->rd_maxcount = maxcount; 3554 readdir->common.err = 0; 3555 readdir->cookie_offset = 0; 3556 3557 offset = readdir->rd_cookie; 3558 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3559 &offset, 3560 &readdir->common, nfsd4_encode_dirent); 3561 if (nfserr == nfs_ok && 3562 readdir->common.err == nfserr_toosmall && 3563 xdr->buf->len == starting_len + 8) { 3564 /* nothing encoded; which limit did we hit?: */ 3565 if (maxcount - 16 < bytes_left) 3566 /* It was the fault of rd_maxcount: */ 3567 nfserr = nfserr_toosmall; 3568 else 3569 /* We ran out of buffer space: */ 3570 nfserr = nfserr_resource; 3571 } 3572 if (nfserr) 3573 goto err_no_verf; 3574 3575 if (readdir->cookie_offset) { 3576 wire_offset = cpu_to_be64(offset); 3577 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3578 &wire_offset, 8); 3579 } 3580 3581 p = xdr_reserve_space(xdr, 8); 3582 if (!p) { 3583 WARN_ON_ONCE(1); 3584 goto err_no_verf; 3585 } 3586 *p++ = 0; /* no more entries */ 3587 *p++ = htonl(readdir->common.err == nfserr_eof); 3588 3589 return 0; 3590 err_no_verf: 3591 xdr_truncate_encode(xdr, starting_len); 3592 return nfserr; 3593 } 3594 3595 static __be32 3596 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3597 { 3598 struct xdr_stream *xdr = &resp->xdr; 3599 __be32 *p; 3600 3601 if (!nfserr) { 3602 p = xdr_reserve_space(xdr, 20); 3603 if (!p) 3604 return nfserr_resource; 3605 p = encode_cinfo(p, &remove->rm_cinfo); 3606 } 3607 return nfserr; 3608 } 3609 3610 static __be32 3611 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3612 { 3613 struct xdr_stream *xdr = &resp->xdr; 3614 __be32 *p; 3615 3616 if (!nfserr) { 3617 p = xdr_reserve_space(xdr, 40); 3618 if (!p) 3619 return nfserr_resource; 3620 p = encode_cinfo(p, &rename->rn_sinfo); 3621 p = encode_cinfo(p, &rename->rn_tinfo); 3622 } 3623 return nfserr; 3624 } 3625 3626 static __be32 3627 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3628 __be32 nfserr, struct svc_export *exp) 3629 { 3630 u32 i, nflavs, supported; 3631 struct exp_flavor_info *flavs; 3632 struct exp_flavor_info def_flavs[2]; 3633 __be32 *p, *flavorsp; 3634 static bool report = true; 3635 3636 if (nfserr) 3637 goto out; 3638 nfserr = nfserr_resource; 3639 if (exp->ex_nflavors) { 3640 flavs = exp->ex_flavors; 3641 nflavs = exp->ex_nflavors; 3642 } else { /* Handling of some defaults in absence of real secinfo: */ 3643 flavs = def_flavs; 3644 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3645 nflavs = 2; 3646 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3647 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3648 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3649 nflavs = 1; 3650 flavs[0].pseudoflavor 3651 = svcauth_gss_flavor(exp->ex_client); 3652 } else { 3653 nflavs = 1; 3654 flavs[0].pseudoflavor 3655 = exp->ex_client->flavour->flavour; 3656 } 3657 } 3658 3659 supported = 0; 3660 p = xdr_reserve_space(xdr, 4); 3661 if (!p) 3662 goto out; 3663 flavorsp = p++; /* to be backfilled later */ 3664 3665 for (i = 0; i < nflavs; i++) { 3666 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3667 struct rpcsec_gss_info info; 3668 3669 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3670 supported++; 3671 p = xdr_reserve_space(xdr, 4 + 4 + 3672 XDR_LEN(info.oid.len) + 4 + 4); 3673 if (!p) 3674 goto out; 3675 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3676 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3677 *p++ = cpu_to_be32(info.qop); 3678 *p++ = cpu_to_be32(info.service); 3679 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3680 supported++; 3681 p = xdr_reserve_space(xdr, 4); 3682 if (!p) 3683 goto out; 3684 *p++ = cpu_to_be32(pf); 3685 } else { 3686 if (report) 3687 pr_warn("NFS: SECINFO: security flavor %u " 3688 "is not supported\n", pf); 3689 } 3690 } 3691 3692 if (nflavs != supported) 3693 report = false; 3694 *flavorsp = htonl(supported); 3695 nfserr = 0; 3696 out: 3697 if (exp) 3698 exp_put(exp); 3699 return nfserr; 3700 } 3701 3702 static __be32 3703 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3704 struct nfsd4_secinfo *secinfo) 3705 { 3706 struct xdr_stream *xdr = &resp->xdr; 3707 3708 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3709 } 3710 3711 static __be32 3712 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3713 struct nfsd4_secinfo_no_name *secinfo) 3714 { 3715 struct xdr_stream *xdr = &resp->xdr; 3716 3717 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3718 } 3719 3720 /* 3721 * The SETATTR encode routine is special -- it always encodes a bitmap, 3722 * regardless of the error status. 3723 */ 3724 static __be32 3725 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3726 { 3727 struct xdr_stream *xdr = &resp->xdr; 3728 __be32 *p; 3729 3730 p = xdr_reserve_space(xdr, 16); 3731 if (!p) 3732 return nfserr_resource; 3733 if (nfserr) { 3734 *p++ = cpu_to_be32(3); 3735 *p++ = cpu_to_be32(0); 3736 *p++ = cpu_to_be32(0); 3737 *p++ = cpu_to_be32(0); 3738 } 3739 else { 3740 *p++ = cpu_to_be32(3); 3741 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3742 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3743 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3744 } 3745 return nfserr; 3746 } 3747 3748 static __be32 3749 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3750 { 3751 struct xdr_stream *xdr = &resp->xdr; 3752 __be32 *p; 3753 3754 if (!nfserr) { 3755 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3756 if (!p) 3757 return nfserr_resource; 3758 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3759 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3760 NFS4_VERIFIER_SIZE); 3761 } 3762 else if (nfserr == nfserr_clid_inuse) { 3763 p = xdr_reserve_space(xdr, 8); 3764 if (!p) 3765 return nfserr_resource; 3766 *p++ = cpu_to_be32(0); 3767 *p++ = cpu_to_be32(0); 3768 } 3769 return nfserr; 3770 } 3771 3772 static __be32 3773 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3774 { 3775 struct xdr_stream *xdr = &resp->xdr; 3776 __be32 *p; 3777 3778 if (!nfserr) { 3779 p = xdr_reserve_space(xdr, 16); 3780 if (!p) 3781 return nfserr_resource; 3782 *p++ = cpu_to_be32(write->wr_bytes_written); 3783 *p++ = cpu_to_be32(write->wr_how_written); 3784 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3785 NFS4_VERIFIER_SIZE); 3786 } 3787 return nfserr; 3788 } 3789 3790 static const u32 nfs4_minimal_spo_must_enforce[2] = { 3791 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 3792 1 << (OP_EXCHANGE_ID - 32) | 3793 1 << (OP_CREATE_SESSION - 32) | 3794 1 << (OP_DESTROY_SESSION - 32) | 3795 1 << (OP_DESTROY_CLIENTID - 32) 3796 }; 3797 3798 static __be32 3799 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3800 struct nfsd4_exchange_id *exid) 3801 { 3802 struct xdr_stream *xdr = &resp->xdr; 3803 __be32 *p; 3804 char *major_id; 3805 char *server_scope; 3806 int major_id_sz; 3807 int server_scope_sz; 3808 uint64_t minor_id = 0; 3809 3810 if (nfserr) 3811 return nfserr; 3812 3813 major_id = utsname()->nodename; 3814 major_id_sz = strlen(major_id); 3815 server_scope = utsname()->nodename; 3816 server_scope_sz = strlen(server_scope); 3817 3818 p = xdr_reserve_space(xdr, 3819 8 /* eir_clientid */ + 3820 4 /* eir_sequenceid */ + 3821 4 /* eir_flags */ + 3822 4 /* spr_how */); 3823 if (!p) 3824 return nfserr_resource; 3825 3826 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3827 *p++ = cpu_to_be32(exid->seqid); 3828 *p++ = cpu_to_be32(exid->flags); 3829 3830 *p++ = cpu_to_be32(exid->spa_how); 3831 3832 switch (exid->spa_how) { 3833 case SP4_NONE: 3834 break; 3835 case SP4_MACH_CRED: 3836 /* spo_must_enforce, spo_must_allow */ 3837 p = xdr_reserve_space(xdr, 16); 3838 if (!p) 3839 return nfserr_resource; 3840 3841 /* spo_must_enforce bitmap: */ 3842 *p++ = cpu_to_be32(2); 3843 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); 3844 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); 3845 /* empty spo_must_allow bitmap: */ 3846 *p++ = cpu_to_be32(0); 3847 3848 break; 3849 default: 3850 WARN_ON_ONCE(1); 3851 } 3852 3853 p = xdr_reserve_space(xdr, 3854 8 /* so_minor_id */ + 3855 4 /* so_major_id.len */ + 3856 (XDR_QUADLEN(major_id_sz) * 4) + 3857 4 /* eir_server_scope.len */ + 3858 (XDR_QUADLEN(server_scope_sz) * 4) + 3859 4 /* eir_server_impl_id.count (0) */); 3860 if (!p) 3861 return nfserr_resource; 3862 3863 /* The server_owner struct */ 3864 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3865 /* major id */ 3866 p = xdr_encode_opaque(p, major_id, major_id_sz); 3867 3868 /* Server scope */ 3869 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3870 3871 /* Implementation id */ 3872 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3873 return 0; 3874 } 3875 3876 static __be32 3877 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3878 struct nfsd4_create_session *sess) 3879 { 3880 struct xdr_stream *xdr = &resp->xdr; 3881 __be32 *p; 3882 3883 if (nfserr) 3884 return nfserr; 3885 3886 p = xdr_reserve_space(xdr, 24); 3887 if (!p) 3888 return nfserr_resource; 3889 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3890 NFS4_MAX_SESSIONID_LEN); 3891 *p++ = cpu_to_be32(sess->seqid); 3892 *p++ = cpu_to_be32(sess->flags); 3893 3894 p = xdr_reserve_space(xdr, 28); 3895 if (!p) 3896 return nfserr_resource; 3897 *p++ = cpu_to_be32(0); /* headerpadsz */ 3898 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3899 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3900 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3901 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3902 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 3903 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 3904 3905 if (sess->fore_channel.nr_rdma_attrs) { 3906 p = xdr_reserve_space(xdr, 4); 3907 if (!p) 3908 return nfserr_resource; 3909 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 3910 } 3911 3912 p = xdr_reserve_space(xdr, 28); 3913 if (!p) 3914 return nfserr_resource; 3915 *p++ = cpu_to_be32(0); /* headerpadsz */ 3916 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 3917 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 3918 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 3919 *p++ = cpu_to_be32(sess->back_channel.maxops); 3920 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 3921 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 3922 3923 if (sess->back_channel.nr_rdma_attrs) { 3924 p = xdr_reserve_space(xdr, 4); 3925 if (!p) 3926 return nfserr_resource; 3927 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 3928 } 3929 return 0; 3930 } 3931 3932 static __be32 3933 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 3934 struct nfsd4_sequence *seq) 3935 { 3936 struct xdr_stream *xdr = &resp->xdr; 3937 __be32 *p; 3938 3939 if (nfserr) 3940 return nfserr; 3941 3942 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 3943 if (!p) 3944 return nfserr_resource; 3945 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 3946 NFS4_MAX_SESSIONID_LEN); 3947 *p++ = cpu_to_be32(seq->seqid); 3948 *p++ = cpu_to_be32(seq->slotid); 3949 /* Note slotid's are numbered from zero: */ 3950 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 3951 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 3952 *p++ = cpu_to_be32(seq->status_flags); 3953 3954 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 3955 return 0; 3956 } 3957 3958 static __be32 3959 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 3960 struct nfsd4_test_stateid *test_stateid) 3961 { 3962 struct xdr_stream *xdr = &resp->xdr; 3963 struct nfsd4_test_stateid_id *stateid, *next; 3964 __be32 *p; 3965 3966 if (nfserr) 3967 return nfserr; 3968 3969 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 3970 if (!p) 3971 return nfserr_resource; 3972 *p++ = htonl(test_stateid->ts_num_ids); 3973 3974 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 3975 *p++ = stateid->ts_id_status; 3976 } 3977 3978 return nfserr; 3979 } 3980 3981 #ifdef CONFIG_NFSD_PNFS 3982 static __be32 3983 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3984 struct nfsd4_getdeviceinfo *gdev) 3985 { 3986 struct xdr_stream *xdr = &resp->xdr; 3987 const struct nfsd4_layout_ops *ops = 3988 nfsd4_layout_ops[gdev->gd_layout_type]; 3989 u32 starting_len = xdr->buf->len, needed_len; 3990 __be32 *p; 3991 3992 dprintk("%s: err %d\n", __func__, nfserr); 3993 if (nfserr) 3994 goto out; 3995 3996 nfserr = nfserr_resource; 3997 p = xdr_reserve_space(xdr, 4); 3998 if (!p) 3999 goto out; 4000 4001 *p++ = cpu_to_be32(gdev->gd_layout_type); 4002 4003 /* If maxcount is 0 then just update notifications */ 4004 if (gdev->gd_maxcount != 0) { 4005 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4006 if (nfserr) { 4007 /* 4008 * We don't bother to burden the layout drivers with 4009 * enforcing gd_maxcount, just tell the client to 4010 * come back with a bigger buffer if it's not enough. 4011 */ 4012 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4013 goto toosmall; 4014 goto out; 4015 } 4016 } 4017 4018 nfserr = nfserr_resource; 4019 if (gdev->gd_notify_types) { 4020 p = xdr_reserve_space(xdr, 4 + 4); 4021 if (!p) 4022 goto out; 4023 *p++ = cpu_to_be32(1); /* bitmap length */ 4024 *p++ = cpu_to_be32(gdev->gd_notify_types); 4025 } else { 4026 p = xdr_reserve_space(xdr, 4); 4027 if (!p) 4028 goto out; 4029 *p++ = 0; 4030 } 4031 4032 nfserr = 0; 4033 out: 4034 kfree(gdev->gd_device); 4035 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4036 return nfserr; 4037 4038 toosmall: 4039 dprintk("%s: maxcount too small\n", __func__); 4040 needed_len = xdr->buf->len + 4 /* notifications */; 4041 xdr_truncate_encode(xdr, starting_len); 4042 p = xdr_reserve_space(xdr, 4); 4043 if (!p) { 4044 nfserr = nfserr_resource; 4045 } else { 4046 *p++ = cpu_to_be32(needed_len); 4047 nfserr = nfserr_toosmall; 4048 } 4049 goto out; 4050 } 4051 4052 static __be32 4053 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4054 struct nfsd4_layoutget *lgp) 4055 { 4056 struct xdr_stream *xdr = &resp->xdr; 4057 const struct nfsd4_layout_ops *ops = 4058 nfsd4_layout_ops[lgp->lg_layout_type]; 4059 __be32 *p; 4060 4061 dprintk("%s: err %d\n", __func__, nfserr); 4062 if (nfserr) 4063 goto out; 4064 4065 nfserr = nfserr_resource; 4066 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4067 if (!p) 4068 goto out; 4069 4070 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4071 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4072 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4073 sizeof(stateid_opaque_t)); 4074 4075 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4076 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4077 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4078 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4079 *p++ = cpu_to_be32(lgp->lg_layout_type); 4080 4081 nfserr = ops->encode_layoutget(xdr, lgp); 4082 out: 4083 kfree(lgp->lg_content); 4084 return nfserr; 4085 } 4086 4087 static __be32 4088 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4089 struct nfsd4_layoutcommit *lcp) 4090 { 4091 struct xdr_stream *xdr = &resp->xdr; 4092 __be32 *p; 4093 4094 if (nfserr) 4095 return nfserr; 4096 4097 p = xdr_reserve_space(xdr, 4); 4098 if (!p) 4099 return nfserr_resource; 4100 *p++ = cpu_to_be32(lcp->lc_size_chg); 4101 if (lcp->lc_size_chg) { 4102 p = xdr_reserve_space(xdr, 8); 4103 if (!p) 4104 return nfserr_resource; 4105 p = xdr_encode_hyper(p, lcp->lc_newsize); 4106 } 4107 4108 return nfs_ok; 4109 } 4110 4111 static __be32 4112 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4113 struct nfsd4_layoutreturn *lrp) 4114 { 4115 struct xdr_stream *xdr = &resp->xdr; 4116 __be32 *p; 4117 4118 if (nfserr) 4119 return nfserr; 4120 4121 p = xdr_reserve_space(xdr, 4); 4122 if (!p) 4123 return nfserr_resource; 4124 *p++ = cpu_to_be32(lrp->lrs_present); 4125 if (lrp->lrs_present) 4126 nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4127 return nfs_ok; 4128 } 4129 #endif /* CONFIG_NFSD_PNFS */ 4130 4131 static __be32 4132 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4133 struct nfsd4_seek *seek) 4134 { 4135 __be32 *p; 4136 4137 if (nfserr) 4138 return nfserr; 4139 4140 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4141 *p++ = cpu_to_be32(seek->seek_eof); 4142 p = xdr_encode_hyper(p, seek->seek_pos); 4143 4144 return nfserr; 4145 } 4146 4147 static __be32 4148 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4149 { 4150 return nfserr; 4151 } 4152 4153 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4154 4155 /* 4156 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4157 * since we don't need to filter out obsolete ops as this is 4158 * done in the decoding phase. 4159 */ 4160 static nfsd4_enc nfsd4_enc_ops[] = { 4161 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4162 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4163 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4164 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4165 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4166 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4167 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4168 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4169 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4170 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4171 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4172 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4173 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4174 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4175 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4176 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4177 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4178 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4179 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4180 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4181 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4182 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4183 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4184 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4185 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4186 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4187 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4188 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4189 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4190 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4191 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4192 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4193 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4194 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4195 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4196 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4197 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4198 4199 /* NFSv4.1 operations */ 4200 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4201 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4202 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4203 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4204 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4205 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4206 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4207 #ifdef CONFIG_NFSD_PNFS 4208 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4209 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4210 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4211 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4212 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4213 #else 4214 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4215 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4216 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4217 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4218 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4219 #endif 4220 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4221 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4222 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4223 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4224 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4225 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4226 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4227 4228 /* NFSv4.2 operations */ 4229 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4230 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, 4231 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4232 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4233 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4234 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4235 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4236 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4237 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4238 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4239 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4240 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4241 }; 4242 4243 /* 4244 * Calculate whether we still have space to encode repsize bytes. 4245 * There are two considerations: 4246 * - For NFS versions >=4.1, the size of the reply must stay within 4247 * session limits 4248 * - For all NFS versions, we must stay within limited preallocated 4249 * buffer space. 4250 * 4251 * This is called before the operation is processed, so can only provide 4252 * an upper estimate. For some nonidempotent operations (such as 4253 * getattr), it's not necessarily a problem if that estimate is wrong, 4254 * as we can fail it after processing without significant side effects. 4255 */ 4256 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4257 { 4258 struct xdr_buf *buf = &resp->rqstp->rq_res; 4259 struct nfsd4_slot *slot = resp->cstate.slot; 4260 4261 if (buf->len + respsize <= buf->buflen) 4262 return nfs_ok; 4263 if (!nfsd4_has_session(&resp->cstate)) 4264 return nfserr_resource; 4265 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4266 WARN_ON_ONCE(1); 4267 return nfserr_rep_too_big_to_cache; 4268 } 4269 return nfserr_rep_too_big; 4270 } 4271 4272 void 4273 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4274 { 4275 struct xdr_stream *xdr = &resp->xdr; 4276 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4277 struct svc_rqst *rqstp = resp->rqstp; 4278 int post_err_offset; 4279 nfsd4_enc encoder; 4280 __be32 *p; 4281 4282 p = xdr_reserve_space(xdr, 8); 4283 if (!p) { 4284 WARN_ON_ONCE(1); 4285 return; 4286 } 4287 *p++ = cpu_to_be32(op->opnum); 4288 post_err_offset = xdr->buf->len; 4289 4290 if (op->opnum == OP_ILLEGAL) 4291 goto status; 4292 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4293 !nfsd4_enc_ops[op->opnum]); 4294 encoder = nfsd4_enc_ops[op->opnum]; 4295 op->status = encoder(resp, op->status, &op->u); 4296 xdr_commit_encode(xdr); 4297 4298 /* nfsd4_check_resp_size guarantees enough room for error status */ 4299 if (!op->status) { 4300 int space_needed = 0; 4301 if (!nfsd4_last_compound_op(rqstp)) 4302 space_needed = COMPOUND_ERR_SLACK_SPACE; 4303 op->status = nfsd4_check_resp_size(resp, space_needed); 4304 } 4305 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4306 struct nfsd4_slot *slot = resp->cstate.slot; 4307 4308 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4309 op->status = nfserr_rep_too_big_to_cache; 4310 else 4311 op->status = nfserr_rep_too_big; 4312 } 4313 if (op->status == nfserr_resource || 4314 op->status == nfserr_rep_too_big || 4315 op->status == nfserr_rep_too_big_to_cache) { 4316 /* 4317 * The operation may have already been encoded or 4318 * partially encoded. No op returns anything additional 4319 * in the case of one of these three errors, so we can 4320 * just truncate back to after the status. But it's a 4321 * bug if we had to do this on a non-idempotent op: 4322 */ 4323 warn_on_nonidempotent_op(op); 4324 xdr_truncate_encode(xdr, post_err_offset); 4325 } 4326 if (so) { 4327 int len = xdr->buf->len - post_err_offset; 4328 4329 so->so_replay.rp_status = op->status; 4330 so->so_replay.rp_buflen = len; 4331 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4332 so->so_replay.rp_buf, len); 4333 } 4334 status: 4335 /* Note that op->status is already in network byte order: */ 4336 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4337 } 4338 4339 /* 4340 * Encode the reply stored in the stateowner reply cache 4341 * 4342 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4343 * previously sent already encoded operation. 4344 */ 4345 void 4346 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4347 { 4348 __be32 *p; 4349 struct nfs4_replay *rp = op->replay; 4350 4351 BUG_ON(!rp); 4352 4353 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4354 if (!p) { 4355 WARN_ON_ONCE(1); 4356 return; 4357 } 4358 *p++ = cpu_to_be32(op->opnum); 4359 *p++ = rp->rp_status; /* already xdr'ed */ 4360 4361 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4362 } 4363 4364 int 4365 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4366 { 4367 return xdr_ressize_check(rqstp, p); 4368 } 4369 4370 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4371 { 4372 struct svc_rqst *rqstp = rq; 4373 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4374 4375 if (args->ops != args->iops) { 4376 kfree(args->ops); 4377 args->ops = args->iops; 4378 } 4379 kfree(args->tmpp); 4380 args->tmpp = NULL; 4381 while (args->to_free) { 4382 struct svcxdr_tmpbuf *tb = args->to_free; 4383 args->to_free = tb->next; 4384 kfree(tb); 4385 } 4386 return 1; 4387 } 4388 4389 int 4390 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4391 { 4392 if (rqstp->rq_arg.head[0].iov_len % 4) { 4393 /* client is nuts */ 4394 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4395 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4396 return 0; 4397 } 4398 args->p = p; 4399 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4400 args->pagelist = rqstp->rq_arg.pages; 4401 args->pagelen = rqstp->rq_arg.page_len; 4402 args->tmpp = NULL; 4403 args->to_free = NULL; 4404 args->ops = args->iops; 4405 args->rqstp = rqstp; 4406 4407 return !nfsd4_decode_compound(args); 4408 } 4409 4410 int 4411 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4412 { 4413 /* 4414 * All that remains is to write the tag and operation count... 4415 */ 4416 struct xdr_buf *buf = resp->xdr.buf; 4417 4418 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4419 buf->tail[0].iov_len); 4420 4421 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4422 4423 p = resp->tagp; 4424 *p++ = htonl(resp->taglen); 4425 memcpy(p, resp->tag, resp->taglen); 4426 p += XDR_QUADLEN(resp->taglen); 4427 *p++ = htonl(resp->opcnt); 4428 4429 nfsd4_sequence_done(resp); 4430 return 1; 4431 } 4432 4433 /* 4434 * Local variables: 4435 * c-basic-offset: 8 4436 * End: 4437 */ 4438