1 /* 2 * Server-side procedures 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 #include <linux/fs_struct.h> 36 #include <linux/file.h> 37 #include <linux/falloc.h> 38 #include <linux/slab.h> 39 #include <linux/kthread.h> 40 #include <linux/sunrpc/addr.h> 41 #include <linux/nfs_ssc.h> 42 43 #include "idmap.h" 44 #include "cache.h" 45 #include "xdr4.h" 46 #include "vfs.h" 47 #include "current_stateid.h" 48 #include "netns.h" 49 #include "acl.h" 50 #include "pnfs.h" 51 #include "trace.h" 52 53 static bool inter_copy_offload_enable; 54 module_param(inter_copy_offload_enable, bool, 0644); 55 MODULE_PARM_DESC(inter_copy_offload_enable, 56 "Enable inter server to server copy offload. Default: false"); 57 58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 59 #include <linux/security.h> 60 61 static inline void 62 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 63 { 64 struct inode *inode = d_inode(resfh->fh_dentry); 65 int status; 66 67 inode_lock(inode); 68 status = security_inode_setsecctx(resfh->fh_dentry, 69 label->data, label->len); 70 inode_unlock(inode); 71 72 if (status) 73 /* 74 * XXX: We should really fail the whole open, but we may 75 * already have created a new file, so it may be too 76 * late. For now this seems the least of evils: 77 */ 78 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 79 80 return; 81 } 82 #else 83 static inline void 84 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 85 { } 86 #endif 87 88 #define NFSDDBG_FACILITY NFSDDBG_PROC 89 90 static u32 nfsd_attrmask[] = { 91 NFSD_WRITEABLE_ATTRS_WORD0, 92 NFSD_WRITEABLE_ATTRS_WORD1, 93 NFSD_WRITEABLE_ATTRS_WORD2 94 }; 95 96 static u32 nfsd41_ex_attrmask[] = { 97 NFSD_SUPPATTR_EXCLCREAT_WORD0, 98 NFSD_SUPPATTR_EXCLCREAT_WORD1, 99 NFSD_SUPPATTR_EXCLCREAT_WORD2 100 }; 101 102 static __be32 103 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 104 u32 *bmval, u32 *writable) 105 { 106 struct dentry *dentry = cstate->current_fh.fh_dentry; 107 struct svc_export *exp = cstate->current_fh.fh_export; 108 109 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 110 return nfserr_attrnotsupp; 111 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 112 return nfserr_attrnotsupp; 113 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 114 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 115 return nfserr_attrnotsupp; 116 if (writable && !bmval_is_subset(bmval, writable)) 117 return nfserr_inval; 118 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 119 (bmval[1] & FATTR4_WORD1_MODE)) 120 return nfserr_inval; 121 return nfs_ok; 122 } 123 124 static __be32 125 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 126 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 127 { 128 __be32 status = nfs_ok; 129 130 if (open->op_create == NFS4_OPEN_CREATE) { 131 if (open->op_createmode == NFS4_CREATE_UNCHECKED 132 || open->op_createmode == NFS4_CREATE_GUARDED) 133 status = check_attr_support(rqstp, cstate, 134 open->op_bmval, nfsd_attrmask); 135 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 136 status = check_attr_support(rqstp, cstate, 137 open->op_bmval, nfsd41_ex_attrmask); 138 } 139 140 return status; 141 } 142 143 static int 144 is_create_with_attrs(struct nfsd4_open *open) 145 { 146 return open->op_create == NFS4_OPEN_CREATE 147 && (open->op_createmode == NFS4_CREATE_UNCHECKED 148 || open->op_createmode == NFS4_CREATE_GUARDED 149 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 150 } 151 152 /* 153 * if error occurs when setting the acl, just clear the acl bit 154 * in the returned attr bitmap. 155 */ 156 static void 157 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 158 struct nfs4_acl *acl, u32 *bmval) 159 { 160 __be32 status; 161 162 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 163 if (status) 164 /* 165 * We should probably fail the whole open at this point, 166 * but we've already created the file, so it's too late; 167 * So this seems the least of evils: 168 */ 169 bmval[0] &= ~FATTR4_WORD0_ACL; 170 } 171 172 static inline void 173 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 174 { 175 fh_put(dst); 176 dget(src->fh_dentry); 177 if (src->fh_export) 178 exp_get(src->fh_export); 179 *dst = *src; 180 } 181 182 static __be32 183 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 184 { 185 __be32 status; 186 187 if (open->op_truncate && 188 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 189 return nfserr_inval; 190 191 accmode |= NFSD_MAY_READ_IF_EXEC; 192 193 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 194 accmode |= NFSD_MAY_READ; 195 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 196 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 197 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 198 accmode |= NFSD_MAY_WRITE; 199 200 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 201 202 return status; 203 } 204 205 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 206 { 207 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 208 209 if (S_ISREG(mode)) 210 return nfs_ok; 211 if (S_ISDIR(mode)) 212 return nfserr_isdir; 213 /* 214 * Using err_symlink as our catch-all case may look odd; but 215 * there's no other obvious error for this case in 4.0, and we 216 * happen to know that it will cause the linux v4 client to do 217 * the right thing on attempts to open something other than a 218 * regular file. 219 */ 220 return nfserr_symlink; 221 } 222 223 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 224 { 225 if (nfsd4_has_session(cstate)) 226 return; 227 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 228 &resfh->fh_handle); 229 } 230 231 static __be32 232 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 233 { 234 struct svc_fh *current_fh = &cstate->current_fh; 235 int accmode; 236 __be32 status; 237 238 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 239 if (!*resfh) 240 return nfserr_jukebox; 241 fh_init(*resfh, NFS4_FHSIZE); 242 open->op_truncate = false; 243 244 if (open->op_create) { 245 /* FIXME: check session persistence and pnfs flags. 246 * The nfsv4.1 spec requires the following semantics: 247 * 248 * Persistent | pNFS | Server REQUIRED | Client Allowed 249 * Reply Cache | server | | 250 * -------------+--------+-----------------+-------------------- 251 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 252 * | | | (SHOULD) 253 * | | and EXCLUSIVE4 | or EXCLUSIVE4 254 * | | | (SHOULD NOT) 255 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 256 * yes | no | GUARDED4 | GUARDED4 257 * yes | yes | GUARDED4 | GUARDED4 258 */ 259 260 /* 261 * Note: create modes (UNCHECKED,GUARDED...) are the same 262 * in NFSv4 as in v3 except EXCLUSIVE4_1. 263 */ 264 current->fs->umask = open->op_umask; 265 status = do_nfsd_create(rqstp, current_fh, open->op_fname, 266 open->op_fnamelen, &open->op_iattr, 267 *resfh, open->op_createmode, 268 (u32 *)open->op_verf.data, 269 &open->op_truncate, &open->op_created); 270 current->fs->umask = 0; 271 272 if (!status && open->op_label.len) 273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 274 275 /* 276 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 277 * use the returned bitmask to indicate which attributes 278 * we used to store the verifier: 279 */ 280 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 281 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 282 FATTR4_WORD1_TIME_MODIFY); 283 } else 284 /* 285 * Note this may exit with the parent still locked. 286 * We will hold the lock until nfsd4_open's final 287 * lookup, to prevent renames or unlinks until we've had 288 * a chance to an acquire a delegation if appropriate. 289 */ 290 status = nfsd_lookup(rqstp, current_fh, 291 open->op_fname, open->op_fnamelen, *resfh); 292 if (status) 293 goto out; 294 status = nfsd_check_obj_isreg(*resfh); 295 if (status) 296 goto out; 297 298 if (is_create_with_attrs(open) && open->op_acl != NULL) 299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 300 301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 302 accmode = NFSD_MAY_NOP; 303 if (open->op_created || 304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 305 accmode |= NFSD_MAY_OWNER_OVERRIDE; 306 status = do_open_permission(rqstp, *resfh, open, accmode); 307 set_change_info(&open->op_cinfo, current_fh); 308 out: 309 return status; 310 } 311 312 static __be32 313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 314 { 315 struct svc_fh *current_fh = &cstate->current_fh; 316 __be32 status; 317 int accmode = 0; 318 319 /* We don't know the target directory, and therefore can not 320 * set the change info 321 */ 322 323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 324 325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 326 327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 328 (open->op_iattr.ia_size == 0); 329 /* 330 * In the delegation case, the client is telling us about an 331 * open that it *already* performed locally, some time ago. We 332 * should let it succeed now if possible. 333 * 334 * In the case of a CLAIM_FH open, on the other hand, the client 335 * may be counting on us to enforce permissions (the Linux 4.1 336 * client uses this for normal opens, for example). 337 */ 338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 339 accmode = NFSD_MAY_OWNER_OVERRIDE; 340 341 status = do_open_permission(rqstp, current_fh, open, accmode); 342 343 return status; 344 } 345 346 static void 347 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 348 { 349 struct nfsd4_sessionid *sid = 350 (struct nfsd4_sessionid *)session->se_sessionid.data; 351 352 clid->cl_boot = sid->clientid.cl_boot; 353 clid->cl_id = sid->clientid.cl_id; 354 } 355 356 static __be32 357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 358 union nfsd4_op_u *u) 359 { 360 struct nfsd4_open *open = &u->open; 361 __be32 status; 362 struct svc_fh *resfh = NULL; 363 struct net *net = SVC_NET(rqstp); 364 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 365 bool reclaim = false; 366 367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 368 (int)open->op_fnamelen, open->op_fname, 369 open->op_openowner); 370 371 /* This check required by spec. */ 372 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 373 return nfserr_inval; 374 375 open->op_created = false; 376 /* 377 * RFC5661 18.51.3 378 * Before RECLAIM_COMPLETE done, server should deny new lock 379 */ 380 if (nfsd4_has_session(cstate) && 381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) && 382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 383 return nfserr_grace; 384 385 if (nfsd4_has_session(cstate)) 386 copy_clientid(&open->op_clientid, cstate->session); 387 388 /* check seqid for replay. set nfs4_owner */ 389 status = nfsd4_process_open1(cstate, open, nn); 390 if (status == nfserr_replay_me) { 391 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 392 fh_put(&cstate->current_fh); 393 fh_copy_shallow(&cstate->current_fh.fh_handle, 394 &rp->rp_openfh); 395 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 396 if (status) 397 dprintk("nfsd4_open: replay failed" 398 " restoring previous filehandle\n"); 399 else 400 status = nfserr_replay_me; 401 } 402 if (status) 403 goto out; 404 if (open->op_xdr_error) { 405 status = open->op_xdr_error; 406 goto out; 407 } 408 409 status = nfsd4_check_open_attributes(rqstp, cstate, open); 410 if (status) 411 goto out; 412 413 /* Openowner is now set, so sequence id will get bumped. Now we need 414 * these checks before we do any creates: */ 415 status = nfserr_grace; 416 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 417 goto out; 418 status = nfserr_no_grace; 419 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 420 goto out; 421 422 switch (open->op_claim_type) { 423 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 424 case NFS4_OPEN_CLAIM_NULL: 425 status = do_open_lookup(rqstp, cstate, open, &resfh); 426 if (status) 427 goto out; 428 break; 429 case NFS4_OPEN_CLAIM_PREVIOUS: 430 status = nfs4_check_open_reclaim(cstate->clp); 431 if (status) 432 goto out; 433 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 434 reclaim = true; 435 fallthrough; 436 case NFS4_OPEN_CLAIM_FH: 437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 438 status = do_open_fhandle(rqstp, cstate, open); 439 if (status) 440 goto out; 441 resfh = &cstate->current_fh; 442 break; 443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 444 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 445 dprintk("NFSD: unsupported OPEN claim type %d\n", 446 open->op_claim_type); 447 status = nfserr_notsupp; 448 goto out; 449 default: 450 dprintk("NFSD: Invalid OPEN claim type %d\n", 451 open->op_claim_type); 452 status = nfserr_inval; 453 goto out; 454 } 455 /* 456 * nfsd4_process_open2() does the actual opening of the file. If 457 * successful, it (1) truncates the file if open->op_truncate was 458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 459 */ 460 status = nfsd4_process_open2(rqstp, resfh, open); 461 WARN(status && open->op_created, 462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 463 be32_to_cpu(status)); 464 if (reclaim && !status) 465 nn->somebody_reclaimed = true; 466 out: 467 if (resfh && resfh != &cstate->current_fh) { 468 fh_dup2(&cstate->current_fh, resfh); 469 fh_put(resfh); 470 kfree(resfh); 471 } 472 nfsd4_cleanup_open_state(cstate, open); 473 nfsd4_bump_seqid(cstate, status); 474 return status; 475 } 476 477 /* 478 * OPEN is the only seqid-mutating operation whose decoding can fail 479 * with a seqid-mutating error (specifically, decoding of user names in 480 * the attributes). Therefore we have to do some processing to look up 481 * the stateowner so that we can bump the seqid. 482 */ 483 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 484 { 485 struct nfsd4_open *open = &op->u.open; 486 487 if (!seqid_mutating_err(ntohl(op->status))) 488 return op->status; 489 if (nfsd4_has_session(cstate)) 490 return op->status; 491 open->op_xdr_error = op->status; 492 return nfsd4_open(rqstp, cstate, &op->u); 493 } 494 495 /* 496 * filehandle-manipulating ops. 497 */ 498 static __be32 499 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 500 union nfsd4_op_u *u) 501 { 502 u->getfh = &cstate->current_fh; 503 return nfs_ok; 504 } 505 506 static __be32 507 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 508 union nfsd4_op_u *u) 509 { 510 struct nfsd4_putfh *putfh = &u->putfh; 511 __be32 ret; 512 513 fh_put(&cstate->current_fh); 514 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 515 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 516 putfh->pf_fhlen); 517 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 518 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 519 if (ret == nfserr_stale && putfh->no_verify) { 520 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 521 ret = 0; 522 } 523 #endif 524 return ret; 525 } 526 527 static __be32 528 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 529 union nfsd4_op_u *u) 530 { 531 __be32 status; 532 533 fh_put(&cstate->current_fh); 534 status = exp_pseudoroot(rqstp, &cstate->current_fh); 535 return status; 536 } 537 538 static __be32 539 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 540 union nfsd4_op_u *u) 541 { 542 if (!cstate->save_fh.fh_dentry) 543 return nfserr_restorefh; 544 545 fh_dup2(&cstate->current_fh, &cstate->save_fh); 546 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 547 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 548 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 549 } 550 return nfs_ok; 551 } 552 553 static __be32 554 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 555 union nfsd4_op_u *u) 556 { 557 fh_dup2(&cstate->save_fh, &cstate->current_fh); 558 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 559 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 560 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 561 } 562 return nfs_ok; 563 } 564 565 /* 566 * misc nfsv4 ops 567 */ 568 static __be32 569 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 570 union nfsd4_op_u *u) 571 { 572 struct nfsd4_access *access = &u->access; 573 u32 access_full; 574 575 access_full = NFS3_ACCESS_FULL; 576 if (cstate->minorversion >= 2) 577 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | 578 NFS4_ACCESS_XAWRITE; 579 580 if (access->ac_req_access & ~access_full) 581 return nfserr_inval; 582 583 access->ac_resp_access = access->ac_req_access; 584 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 585 &access->ac_supported); 586 } 587 588 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 589 { 590 __be32 *verf = (__be32 *)verifier->data; 591 592 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 593 594 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); 595 } 596 597 static __be32 598 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 599 union nfsd4_op_u *u) 600 { 601 struct nfsd4_commit *commit = &u->commit; 602 603 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 604 commit->co_count, 605 (__be32 *)commit->co_verf.data); 606 } 607 608 static __be32 609 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 610 union nfsd4_op_u *u) 611 { 612 struct nfsd4_create *create = &u->create; 613 struct svc_fh resfh; 614 __be32 status; 615 dev_t rdev; 616 617 fh_init(&resfh, NFS4_FHSIZE); 618 619 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 620 if (status) 621 return status; 622 623 status = check_attr_support(rqstp, cstate, create->cr_bmval, 624 nfsd_attrmask); 625 if (status) 626 return status; 627 628 current->fs->umask = create->cr_umask; 629 switch (create->cr_type) { 630 case NF4LNK: 631 status = nfsd_symlink(rqstp, &cstate->current_fh, 632 create->cr_name, create->cr_namelen, 633 create->cr_data, &resfh); 634 break; 635 636 case NF4BLK: 637 status = nfserr_inval; 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 639 if (MAJOR(rdev) != create->cr_specdata1 || 640 MINOR(rdev) != create->cr_specdata2) 641 goto out_umask; 642 status = nfsd_create(rqstp, &cstate->current_fh, 643 create->cr_name, create->cr_namelen, 644 &create->cr_iattr, S_IFBLK, rdev, &resfh); 645 break; 646 647 case NF4CHR: 648 status = nfserr_inval; 649 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 650 if (MAJOR(rdev) != create->cr_specdata1 || 651 MINOR(rdev) != create->cr_specdata2) 652 goto out_umask; 653 status = nfsd_create(rqstp, &cstate->current_fh, 654 create->cr_name, create->cr_namelen, 655 &create->cr_iattr,S_IFCHR, rdev, &resfh); 656 break; 657 658 case NF4SOCK: 659 status = nfsd_create(rqstp, &cstate->current_fh, 660 create->cr_name, create->cr_namelen, 661 &create->cr_iattr, S_IFSOCK, 0, &resfh); 662 break; 663 664 case NF4FIFO: 665 status = nfsd_create(rqstp, &cstate->current_fh, 666 create->cr_name, create->cr_namelen, 667 &create->cr_iattr, S_IFIFO, 0, &resfh); 668 break; 669 670 case NF4DIR: 671 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 672 status = nfsd_create(rqstp, &cstate->current_fh, 673 create->cr_name, create->cr_namelen, 674 &create->cr_iattr, S_IFDIR, 0, &resfh); 675 break; 676 677 default: 678 status = nfserr_badtype; 679 } 680 681 if (status) 682 goto out; 683 684 if (create->cr_label.len) 685 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 686 687 if (create->cr_acl != NULL) 688 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 689 create->cr_bmval); 690 691 fh_unlock(&cstate->current_fh); 692 set_change_info(&create->cr_cinfo, &cstate->current_fh); 693 fh_dup2(&cstate->current_fh, &resfh); 694 out: 695 fh_put(&resfh); 696 out_umask: 697 current->fs->umask = 0; 698 return status; 699 } 700 701 static __be32 702 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 703 union nfsd4_op_u *u) 704 { 705 struct nfsd4_getattr *getattr = &u->getattr; 706 __be32 status; 707 708 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 709 if (status) 710 return status; 711 712 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 713 return nfserr_inval; 714 715 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 716 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 717 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 718 719 getattr->ga_fhp = &cstate->current_fh; 720 return nfs_ok; 721 } 722 723 static __be32 724 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 725 union nfsd4_op_u *u) 726 { 727 struct nfsd4_link *link = &u->link; 728 __be32 status; 729 730 status = nfsd_link(rqstp, &cstate->current_fh, 731 link->li_name, link->li_namelen, &cstate->save_fh); 732 if (!status) 733 set_change_info(&link->li_cinfo, &cstate->current_fh); 734 return status; 735 } 736 737 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 738 { 739 struct svc_fh tmp_fh; 740 __be32 ret; 741 742 fh_init(&tmp_fh, NFS4_FHSIZE); 743 ret = exp_pseudoroot(rqstp, &tmp_fh); 744 if (ret) 745 return ret; 746 if (tmp_fh.fh_dentry == fh->fh_dentry) { 747 fh_put(&tmp_fh); 748 return nfserr_noent; 749 } 750 fh_put(&tmp_fh); 751 return nfsd_lookup(rqstp, fh, "..", 2, fh); 752 } 753 754 static __be32 755 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 756 union nfsd4_op_u *u) 757 { 758 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 759 } 760 761 static __be32 762 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 763 union nfsd4_op_u *u) 764 { 765 return nfsd_lookup(rqstp, &cstate->current_fh, 766 u->lookup.lo_name, u->lookup.lo_len, 767 &cstate->current_fh); 768 } 769 770 static __be32 771 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 772 union nfsd4_op_u *u) 773 { 774 struct nfsd4_read *read = &u->read; 775 __be32 status; 776 777 read->rd_nf = NULL; 778 if (read->rd_offset >= OFFSET_MAX) 779 return nfserr_inval; 780 781 trace_nfsd_read_start(rqstp, &cstate->current_fh, 782 read->rd_offset, read->rd_length); 783 784 /* 785 * If we do a zero copy read, then a client will see read data 786 * that reflects the state of the file *after* performing the 787 * following compound. 788 * 789 * To ensure proper ordering, we therefore turn off zero copy if 790 * the client wants us to do more in this compound: 791 */ 792 if (!nfsd4_last_compound_op(rqstp)) 793 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 794 795 /* check stateid */ 796 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 797 &read->rd_stateid, RD_STATE, 798 &read->rd_nf, NULL); 799 if (status) { 800 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 801 goto out; 802 } 803 status = nfs_ok; 804 out: 805 read->rd_rqstp = rqstp; 806 read->rd_fhp = &cstate->current_fh; 807 return status; 808 } 809 810 811 static void 812 nfsd4_read_release(union nfsd4_op_u *u) 813 { 814 if (u->read.rd_nf) 815 nfsd_file_put(u->read.rd_nf); 816 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 817 u->read.rd_offset, u->read.rd_length); 818 } 819 820 static __be32 821 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 822 union nfsd4_op_u *u) 823 { 824 struct nfsd4_readdir *readdir = &u->readdir; 825 u64 cookie = readdir->rd_cookie; 826 static const nfs4_verifier zeroverf; 827 828 /* no need to check permission - this will be done in nfsd_readdir() */ 829 830 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 831 return nfserr_inval; 832 833 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 834 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 835 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 836 837 if ((cookie == 1) || (cookie == 2) || 838 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 839 return nfserr_bad_cookie; 840 841 readdir->rd_rqstp = rqstp; 842 readdir->rd_fhp = &cstate->current_fh; 843 return nfs_ok; 844 } 845 846 static __be32 847 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 848 union nfsd4_op_u *u) 849 { 850 u->readlink.rl_rqstp = rqstp; 851 u->readlink.rl_fhp = &cstate->current_fh; 852 return nfs_ok; 853 } 854 855 static __be32 856 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 857 union nfsd4_op_u *u) 858 { 859 struct nfsd4_remove *remove = &u->remove; 860 __be32 status; 861 862 if (opens_in_grace(SVC_NET(rqstp))) 863 return nfserr_grace; 864 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 865 remove->rm_name, remove->rm_namelen); 866 if (!status) { 867 fh_unlock(&cstate->current_fh); 868 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 869 } 870 return status; 871 } 872 873 static __be32 874 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 875 union nfsd4_op_u *u) 876 { 877 struct nfsd4_rename *rename = &u->rename; 878 __be32 status; 879 880 if (opens_in_grace(SVC_NET(rqstp))) 881 return nfserr_grace; 882 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 883 rename->rn_snamelen, &cstate->current_fh, 884 rename->rn_tname, rename->rn_tnamelen); 885 if (status) 886 return status; 887 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 888 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 889 return nfs_ok; 890 } 891 892 static __be32 893 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 894 union nfsd4_op_u *u) 895 { 896 struct nfsd4_secinfo *secinfo = &u->secinfo; 897 struct svc_export *exp; 898 struct dentry *dentry; 899 __be32 err; 900 901 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 902 if (err) 903 return err; 904 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 905 secinfo->si_name, secinfo->si_namelen, 906 &exp, &dentry); 907 if (err) 908 return err; 909 fh_unlock(&cstate->current_fh); 910 if (d_really_is_negative(dentry)) { 911 exp_put(exp); 912 err = nfserr_noent; 913 } else 914 secinfo->si_exp = exp; 915 dput(dentry); 916 if (cstate->minorversion) 917 /* See rfc 5661 section 2.6.3.1.1.8 */ 918 fh_put(&cstate->current_fh); 919 return err; 920 } 921 922 static __be32 923 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 924 union nfsd4_op_u *u) 925 { 926 __be32 err; 927 928 switch (u->secinfo_no_name.sin_style) { 929 case NFS4_SECINFO_STYLE4_CURRENT_FH: 930 break; 931 case NFS4_SECINFO_STYLE4_PARENT: 932 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 933 if (err) 934 return err; 935 break; 936 default: 937 return nfserr_inval; 938 } 939 940 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 941 fh_put(&cstate->current_fh); 942 return nfs_ok; 943 } 944 945 static void 946 nfsd4_secinfo_release(union nfsd4_op_u *u) 947 { 948 if (u->secinfo.si_exp) 949 exp_put(u->secinfo.si_exp); 950 } 951 952 static void 953 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 954 { 955 if (u->secinfo_no_name.sin_exp) 956 exp_put(u->secinfo_no_name.sin_exp); 957 } 958 959 static __be32 960 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 961 union nfsd4_op_u *u) 962 { 963 struct nfsd4_setattr *setattr = &u->setattr; 964 __be32 status = nfs_ok; 965 int err; 966 967 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 968 status = nfs4_preprocess_stateid_op(rqstp, cstate, 969 &cstate->current_fh, &setattr->sa_stateid, 970 WR_STATE, NULL, NULL); 971 if (status) { 972 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 973 return status; 974 } 975 } 976 err = fh_want_write(&cstate->current_fh); 977 if (err) 978 return nfserrno(err); 979 status = nfs_ok; 980 981 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 982 nfsd_attrmask); 983 if (status) 984 goto out; 985 986 if (setattr->sa_acl != NULL) 987 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 988 setattr->sa_acl); 989 if (status) 990 goto out; 991 if (setattr->sa_label.len) 992 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 993 &setattr->sa_label); 994 if (status) 995 goto out; 996 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 997 0, (time64_t)0); 998 out: 999 fh_drop_write(&cstate->current_fh); 1000 return status; 1001 } 1002 1003 static __be32 1004 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1005 union nfsd4_op_u *u) 1006 { 1007 struct nfsd4_write *write = &u->write; 1008 stateid_t *stateid = &write->wr_stateid; 1009 struct nfsd_file *nf = NULL; 1010 __be32 status = nfs_ok; 1011 unsigned long cnt; 1012 int nvecs; 1013 1014 if (write->wr_offset >= OFFSET_MAX) 1015 return nfserr_inval; 1016 1017 cnt = write->wr_buflen; 1018 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1019 write->wr_offset, cnt); 1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1021 stateid, WR_STATE, &nf, NULL); 1022 if (status) { 1023 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1024 return status; 1025 } 1026 1027 write->wr_how_written = write->wr_stable_how; 1028 1029 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages, 1030 write->wr_payload.head, write->wr_buflen); 1031 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1032 1033 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1034 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1035 write->wr_how_written, 1036 (__be32 *)write->wr_verifier.data); 1037 nfsd_file_put(nf); 1038 1039 write->wr_bytes_written = cnt; 1040 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1041 write->wr_offset, cnt); 1042 return status; 1043 } 1044 1045 static __be32 1046 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1047 stateid_t *src_stateid, struct nfsd_file **src, 1048 stateid_t *dst_stateid, struct nfsd_file **dst) 1049 { 1050 __be32 status; 1051 1052 if (!cstate->save_fh.fh_dentry) 1053 return nfserr_nofilehandle; 1054 1055 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1056 src_stateid, RD_STATE, src, NULL); 1057 if (status) { 1058 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1059 goto out; 1060 } 1061 1062 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1063 dst_stateid, WR_STATE, dst, NULL); 1064 if (status) { 1065 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1066 goto out_put_src; 1067 } 1068 1069 /* fix up for NFS-specific error code */ 1070 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1071 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1072 status = nfserr_wrong_type; 1073 goto out_put_dst; 1074 } 1075 1076 out: 1077 return status; 1078 out_put_dst: 1079 nfsd_file_put(*dst); 1080 out_put_src: 1081 nfsd_file_put(*src); 1082 goto out; 1083 } 1084 1085 static __be32 1086 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1087 union nfsd4_op_u *u) 1088 { 1089 struct nfsd4_clone *clone = &u->clone; 1090 struct nfsd_file *src, *dst; 1091 __be32 status; 1092 1093 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1094 &clone->cl_dst_stateid, &dst); 1095 if (status) 1096 goto out; 1097 1098 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1099 dst, clone->cl_dst_pos, clone->cl_count, 1100 EX_ISSYNC(cstate->current_fh.fh_export)); 1101 1102 nfsd_file_put(dst); 1103 nfsd_file_put(src); 1104 out: 1105 return status; 1106 } 1107 1108 void nfs4_put_copy(struct nfsd4_copy *copy) 1109 { 1110 if (!refcount_dec_and_test(©->refcount)) 1111 return; 1112 kfree(copy); 1113 } 1114 1115 static bool 1116 check_and_set_stop_copy(struct nfsd4_copy *copy) 1117 { 1118 bool value; 1119 1120 spin_lock(©->cp_clp->async_lock); 1121 value = copy->stopped; 1122 if (!copy->stopped) 1123 copy->stopped = true; 1124 spin_unlock(©->cp_clp->async_lock); 1125 return value; 1126 } 1127 1128 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1129 { 1130 /* only 1 thread should stop the copy */ 1131 if (!check_and_set_stop_copy(copy)) 1132 kthread_stop(copy->copy_task); 1133 nfs4_put_copy(copy); 1134 } 1135 1136 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1137 { 1138 struct nfsd4_copy *copy = NULL; 1139 1140 spin_lock(&clp->async_lock); 1141 if (!list_empty(&clp->async_copies)) { 1142 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1143 copies); 1144 refcount_inc(©->refcount); 1145 } 1146 spin_unlock(&clp->async_lock); 1147 return copy; 1148 } 1149 1150 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1151 { 1152 struct nfsd4_copy *copy; 1153 1154 while ((copy = nfsd4_get_copy(clp)) != NULL) 1155 nfsd4_stop_copy(copy); 1156 } 1157 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 1158 1159 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1160 struct nfs_fh *src_fh, 1161 nfs4_stateid *stateid); 1162 extern void nfs42_ssc_close(struct file *filep); 1163 1164 extern void nfs_sb_deactive(struct super_block *sb); 1165 1166 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1167 1168 /* 1169 * Support one copy source server for now. 1170 */ 1171 static __be32 1172 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1173 struct vfsmount **mount) 1174 { 1175 struct file_system_type *type; 1176 struct vfsmount *ss_mnt; 1177 struct nfs42_netaddr *naddr; 1178 struct sockaddr_storage tmp_addr; 1179 size_t tmp_addrlen, match_netid_len = 3; 1180 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1181 char *ipaddr, *dev_name, *raw_data; 1182 int len, raw_len; 1183 __be32 status = nfserr_inval; 1184 1185 naddr = &nss->u.nl4_addr; 1186 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1187 naddr->addr_len, 1188 (struct sockaddr *)&tmp_addr, 1189 sizeof(tmp_addr)); 1190 if (tmp_addrlen == 0) 1191 goto out_err; 1192 1193 if (tmp_addr.ss_family == AF_INET6) { 1194 startsep = "["; 1195 endsep = "]"; 1196 match_netid = "tcp6"; 1197 match_netid_len = 4; 1198 } 1199 1200 if (naddr->netid_len != match_netid_len || 1201 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1202 goto out_err; 1203 1204 /* Construct the raw data for the vfs_kern_mount call */ 1205 len = RPC_MAX_ADDRBUFLEN + 1; 1206 ipaddr = kzalloc(len, GFP_KERNEL); 1207 if (!ipaddr) 1208 goto out_err; 1209 1210 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1211 1212 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1213 1214 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1215 raw_data = kzalloc(raw_len, GFP_KERNEL); 1216 if (!raw_data) 1217 goto out_free_ipaddr; 1218 1219 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1220 1221 status = nfserr_nodev; 1222 type = get_fs_type("nfs"); 1223 if (!type) 1224 goto out_free_rawdata; 1225 1226 /* Set the server:<export> for the vfs_kern_mount call */ 1227 dev_name = kzalloc(len + 5, GFP_KERNEL); 1228 if (!dev_name) 1229 goto out_free_rawdata; 1230 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1231 1232 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1233 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1234 module_put(type->owner); 1235 if (IS_ERR(ss_mnt)) 1236 goto out_free_devname; 1237 1238 status = 0; 1239 *mount = ss_mnt; 1240 1241 out_free_devname: 1242 kfree(dev_name); 1243 out_free_rawdata: 1244 kfree(raw_data); 1245 out_free_ipaddr: 1246 kfree(ipaddr); 1247 out_err: 1248 return status; 1249 } 1250 1251 static void 1252 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1253 { 1254 nfs_do_sb_deactive(ss_mnt->mnt_sb); 1255 mntput(ss_mnt); 1256 } 1257 1258 /* 1259 * Verify COPY destination stateid. 1260 * 1261 * Connect to the source server with NFSv4.1. 1262 * Create the source struct file for nfsd_copy_range. 1263 * Called with COPY cstate: 1264 * SAVED_FH: source filehandle 1265 * CURRENT_FH: destination filehandle 1266 */ 1267 static __be32 1268 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1269 struct nfsd4_compound_state *cstate, 1270 struct nfsd4_copy *copy, struct vfsmount **mount) 1271 { 1272 struct svc_fh *s_fh = NULL; 1273 stateid_t *s_stid = ©->cp_src_stateid; 1274 __be32 status = nfserr_inval; 1275 1276 /* Verify the destination stateid and set dst struct file*/ 1277 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1278 ©->cp_dst_stateid, 1279 WR_STATE, ©->nf_dst, NULL); 1280 if (status) 1281 goto out; 1282 1283 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); 1284 if (status) 1285 goto out; 1286 1287 s_fh = &cstate->save_fh; 1288 1289 copy->c_fh.size = s_fh->fh_handle.fh_size; 1290 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); 1291 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1292 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1293 sizeof(stateid_opaque_t)); 1294 1295 status = 0; 1296 out: 1297 return status; 1298 } 1299 1300 static void 1301 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1302 struct nfsd_file *dst) 1303 { 1304 nfs42_ssc_close(src->nf_file); 1305 /* 'src' is freed by nfsd4_do_async_copy */ 1306 nfsd_file_put(dst); 1307 mntput(ss_mnt); 1308 } 1309 1310 #else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1311 1312 static __be32 1313 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1314 struct nfsd4_compound_state *cstate, 1315 struct nfsd4_copy *copy, 1316 struct vfsmount **mount) 1317 { 1318 *mount = NULL; 1319 return nfserr_inval; 1320 } 1321 1322 static void 1323 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1324 struct nfsd_file *dst) 1325 { 1326 } 1327 1328 static void 1329 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1330 { 1331 } 1332 1333 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1334 struct nfs_fh *src_fh, 1335 nfs4_stateid *stateid) 1336 { 1337 return NULL; 1338 } 1339 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1340 1341 static __be32 1342 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1343 struct nfsd4_compound_state *cstate, 1344 struct nfsd4_copy *copy) 1345 { 1346 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1347 ©->nf_src, ©->cp_dst_stateid, 1348 ©->nf_dst); 1349 } 1350 1351 static void 1352 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) 1353 { 1354 nfsd_file_put(src); 1355 nfsd_file_put(dst); 1356 } 1357 1358 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1359 { 1360 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1361 1362 nfs4_put_copy(copy); 1363 } 1364 1365 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1366 struct rpc_task *task) 1367 { 1368 return 1; 1369 } 1370 1371 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1372 .release = nfsd4_cb_offload_release, 1373 .done = nfsd4_cb_offload_done 1374 }; 1375 1376 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1377 { 1378 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1379 copy->cp_synchronous = sync; 1380 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1381 } 1382 1383 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1384 { 1385 ssize_t bytes_copied = 0; 1386 size_t bytes_total = copy->cp_count; 1387 u64 src_pos = copy->cp_src_pos; 1388 u64 dst_pos = copy->cp_dst_pos; 1389 1390 do { 1391 if (kthread_should_stop()) 1392 break; 1393 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, 1394 src_pos, copy->nf_dst->nf_file, dst_pos, 1395 bytes_total); 1396 if (bytes_copied <= 0) 1397 break; 1398 bytes_total -= bytes_copied; 1399 copy->cp_res.wr_bytes_written += bytes_copied; 1400 src_pos += bytes_copied; 1401 dst_pos += bytes_copied; 1402 } while (bytes_total > 0 && !copy->cp_synchronous); 1403 return bytes_copied; 1404 } 1405 1406 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1407 { 1408 __be32 status; 1409 ssize_t bytes; 1410 1411 bytes = _nfsd_copy_file_range(copy); 1412 /* for async copy, we ignore the error, client can always retry 1413 * to get the error 1414 */ 1415 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1416 status = nfserrno(bytes); 1417 else { 1418 nfsd4_init_copy_res(copy, sync); 1419 status = nfs_ok; 1420 } 1421 1422 if (!copy->cp_intra) /* Inter server SSC */ 1423 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, 1424 copy->nf_dst); 1425 else 1426 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); 1427 1428 return status; 1429 } 1430 1431 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1432 { 1433 dst->cp_src_pos = src->cp_src_pos; 1434 dst->cp_dst_pos = src->cp_dst_pos; 1435 dst->cp_count = src->cp_count; 1436 dst->cp_synchronous = src->cp_synchronous; 1437 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1438 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1439 dst->cp_clp = src->cp_clp; 1440 dst->nf_dst = nfsd_file_get(src->nf_dst); 1441 dst->cp_intra = src->cp_intra; 1442 if (src->cp_intra) /* for inter, file_src doesn't exist yet */ 1443 dst->nf_src = nfsd_file_get(src->nf_src); 1444 1445 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1446 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); 1447 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1448 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1449 dst->ss_mnt = src->ss_mnt; 1450 } 1451 1452 static void cleanup_async_copy(struct nfsd4_copy *copy) 1453 { 1454 nfs4_free_copy_state(copy); 1455 nfsd_file_put(copy->nf_dst); 1456 if (copy->cp_intra) 1457 nfsd_file_put(copy->nf_src); 1458 spin_lock(©->cp_clp->async_lock); 1459 list_del(©->copies); 1460 spin_unlock(©->cp_clp->async_lock); 1461 nfs4_put_copy(copy); 1462 } 1463 1464 static int nfsd4_do_async_copy(void *data) 1465 { 1466 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1467 struct nfsd4_copy *cb_copy; 1468 1469 if (!copy->cp_intra) { /* Inter server SSC */ 1470 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1471 if (!copy->nf_src) { 1472 copy->nfserr = nfserr_serverfault; 1473 nfsd4_interssc_disconnect(copy->ss_mnt); 1474 goto do_callback; 1475 } 1476 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1477 ©->stateid); 1478 if (IS_ERR(copy->nf_src->nf_file)) { 1479 copy->nfserr = nfserr_offload_denied; 1480 nfsd4_interssc_disconnect(copy->ss_mnt); 1481 goto do_callback; 1482 } 1483 } 1484 1485 copy->nfserr = nfsd4_do_copy(copy, 0); 1486 do_callback: 1487 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1488 if (!cb_copy) 1489 goto out; 1490 refcount_set(&cb_copy->refcount, 1); 1491 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1492 cb_copy->cp_clp = copy->cp_clp; 1493 cb_copy->nfserr = copy->nfserr; 1494 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1495 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1496 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1497 nfsd4_run_cb(&cb_copy->cp_cb); 1498 out: 1499 if (!copy->cp_intra) 1500 kfree(copy->nf_src); 1501 cleanup_async_copy(copy); 1502 return 0; 1503 } 1504 1505 static __be32 1506 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1507 union nfsd4_op_u *u) 1508 { 1509 struct nfsd4_copy *copy = &u->copy; 1510 __be32 status; 1511 struct nfsd4_copy *async_copy = NULL; 1512 1513 if (!copy->cp_intra) { /* Inter server SSC */ 1514 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1515 status = nfserr_notsupp; 1516 goto out; 1517 } 1518 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1519 ©->ss_mnt); 1520 if (status) 1521 return nfserr_offload_denied; 1522 } else { 1523 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1524 if (status) 1525 return status; 1526 } 1527 1528 copy->cp_clp = cstate->clp; 1529 memcpy(©->fh, &cstate->current_fh.fh_handle, 1530 sizeof(struct knfsd_fh)); 1531 if (!copy->cp_synchronous) { 1532 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1533 1534 status = nfserrno(-ENOMEM); 1535 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1536 if (!async_copy) 1537 goto out_err; 1538 if (!nfs4_init_copy_state(nn, copy)) 1539 goto out_err; 1540 refcount_set(&async_copy->refcount, 1); 1541 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1542 sizeof(copy->cp_stateid)); 1543 dup_copy_fields(copy, async_copy); 1544 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1545 async_copy, "%s", "copy thread"); 1546 if (IS_ERR(async_copy->copy_task)) 1547 goto out_err; 1548 spin_lock(&async_copy->cp_clp->async_lock); 1549 list_add(&async_copy->copies, 1550 &async_copy->cp_clp->async_copies); 1551 spin_unlock(&async_copy->cp_clp->async_lock); 1552 wake_up_process(async_copy->copy_task); 1553 status = nfs_ok; 1554 } else { 1555 status = nfsd4_do_copy(copy, 1); 1556 } 1557 out: 1558 return status; 1559 out_err: 1560 if (async_copy) 1561 cleanup_async_copy(async_copy); 1562 status = nfserrno(-ENOMEM); 1563 if (!copy->cp_intra) 1564 nfsd4_interssc_disconnect(copy->ss_mnt); 1565 goto out; 1566 } 1567 1568 struct nfsd4_copy * 1569 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1570 { 1571 struct nfsd4_copy *copy; 1572 1573 spin_lock(&clp->async_lock); 1574 list_for_each_entry(copy, &clp->async_copies, copies) { 1575 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1576 continue; 1577 refcount_inc(©->refcount); 1578 spin_unlock(&clp->async_lock); 1579 return copy; 1580 } 1581 spin_unlock(&clp->async_lock); 1582 return NULL; 1583 } 1584 1585 static __be32 1586 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1587 struct nfsd4_compound_state *cstate, 1588 union nfsd4_op_u *u) 1589 { 1590 struct nfsd4_offload_status *os = &u->offload_status; 1591 struct nfsd4_copy *copy; 1592 struct nfs4_client *clp = cstate->clp; 1593 1594 copy = find_async_copy(clp, &os->stateid); 1595 if (!copy) { 1596 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1597 1598 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1599 } else 1600 nfsd4_stop_copy(copy); 1601 1602 return nfs_ok; 1603 } 1604 1605 static __be32 1606 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1607 union nfsd4_op_u *u) 1608 { 1609 struct nfsd4_copy_notify *cn = &u->copy_notify; 1610 __be32 status; 1611 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1612 struct nfs4_stid *stid; 1613 struct nfs4_cpntf_state *cps; 1614 struct nfs4_client *clp = cstate->clp; 1615 1616 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1617 &cn->cpn_src_stateid, RD_STATE, NULL, 1618 &stid); 1619 if (status) 1620 return status; 1621 1622 cn->cpn_sec = nn->nfsd4_lease; 1623 cn->cpn_nsec = 0; 1624 1625 status = nfserrno(-ENOMEM); 1626 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1627 if (!cps) 1628 goto out; 1629 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1630 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1631 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1632 1633 /* For now, only return one server address in cpn_src, the 1634 * address used by the client to connect to this server. 1635 */ 1636 cn->cpn_src.nl4_type = NL4_NETADDR; 1637 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1638 &cn->cpn_src.u.nl4_addr); 1639 WARN_ON_ONCE(status); 1640 if (status) { 1641 nfs4_put_cpntf_state(nn, cps); 1642 goto out; 1643 } 1644 out: 1645 nfs4_put_stid(stid); 1646 return status; 1647 } 1648 1649 static __be32 1650 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1651 struct nfsd4_fallocate *fallocate, int flags) 1652 { 1653 __be32 status; 1654 struct nfsd_file *nf; 1655 1656 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1657 &fallocate->falloc_stateid, 1658 WR_STATE, &nf, NULL); 1659 if (status != nfs_ok) { 1660 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1661 return status; 1662 } 1663 1664 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1665 fallocate->falloc_offset, 1666 fallocate->falloc_length, 1667 flags); 1668 nfsd_file_put(nf); 1669 return status; 1670 } 1671 static __be32 1672 nfsd4_offload_status(struct svc_rqst *rqstp, 1673 struct nfsd4_compound_state *cstate, 1674 union nfsd4_op_u *u) 1675 { 1676 struct nfsd4_offload_status *os = &u->offload_status; 1677 __be32 status = 0; 1678 struct nfsd4_copy *copy; 1679 struct nfs4_client *clp = cstate->clp; 1680 1681 copy = find_async_copy(clp, &os->stateid); 1682 if (copy) { 1683 os->count = copy->cp_res.wr_bytes_written; 1684 nfs4_put_copy(copy); 1685 } else 1686 status = nfserr_bad_stateid; 1687 1688 return status; 1689 } 1690 1691 static __be32 1692 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1693 union nfsd4_op_u *u) 1694 { 1695 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1696 } 1697 1698 static __be32 1699 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1700 union nfsd4_op_u *u) 1701 { 1702 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1703 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1704 } 1705 1706 static __be32 1707 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1708 union nfsd4_op_u *u) 1709 { 1710 struct nfsd4_seek *seek = &u->seek; 1711 int whence; 1712 __be32 status; 1713 struct nfsd_file *nf; 1714 1715 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1716 &seek->seek_stateid, 1717 RD_STATE, &nf, NULL); 1718 if (status) { 1719 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1720 return status; 1721 } 1722 1723 switch (seek->seek_whence) { 1724 case NFS4_CONTENT_DATA: 1725 whence = SEEK_DATA; 1726 break; 1727 case NFS4_CONTENT_HOLE: 1728 whence = SEEK_HOLE; 1729 break; 1730 default: 1731 status = nfserr_union_notsupp; 1732 goto out; 1733 } 1734 1735 /* 1736 * Note: This call does change file->f_pos, but nothing in NFSD 1737 * should ever file->f_pos. 1738 */ 1739 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1740 if (seek->seek_pos < 0) 1741 status = nfserrno(seek->seek_pos); 1742 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1743 seek->seek_eof = true; 1744 1745 out: 1746 nfsd_file_put(nf); 1747 return status; 1748 } 1749 1750 /* This routine never returns NFS_OK! If there are no other errors, it 1751 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1752 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1753 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1754 */ 1755 static __be32 1756 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1757 struct nfsd4_verify *verify) 1758 { 1759 __be32 *buf, *p; 1760 int count; 1761 __be32 status; 1762 1763 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1764 if (status) 1765 return status; 1766 1767 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1768 if (status) 1769 return status; 1770 1771 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1772 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1773 return nfserr_inval; 1774 if (verify->ve_attrlen & 3) 1775 return nfserr_inval; 1776 1777 /* count in words: 1778 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1779 */ 1780 count = 4 + (verify->ve_attrlen >> 2); 1781 buf = kmalloc(count << 2, GFP_KERNEL); 1782 if (!buf) 1783 return nfserr_jukebox; 1784 1785 p = buf; 1786 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1787 cstate->current_fh.fh_export, 1788 cstate->current_fh.fh_dentry, 1789 verify->ve_bmval, 1790 rqstp, 0); 1791 /* 1792 * If nfsd4_encode_fattr() ran out of space, assume that's because 1793 * the attributes are longer (hence different) than those given: 1794 */ 1795 if (status == nfserr_resource) 1796 status = nfserr_not_same; 1797 if (status) 1798 goto out_kfree; 1799 1800 /* skip bitmap */ 1801 p = buf + 1 + ntohl(buf[0]); 1802 status = nfserr_not_same; 1803 if (ntohl(*p++) != verify->ve_attrlen) 1804 goto out_kfree; 1805 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1806 status = nfserr_same; 1807 1808 out_kfree: 1809 kfree(buf); 1810 return status; 1811 } 1812 1813 static __be32 1814 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1815 union nfsd4_op_u *u) 1816 { 1817 __be32 status; 1818 1819 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1820 return status == nfserr_not_same ? nfs_ok : status; 1821 } 1822 1823 static __be32 1824 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1825 union nfsd4_op_u *u) 1826 { 1827 __be32 status; 1828 1829 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1830 return status == nfserr_same ? nfs_ok : status; 1831 } 1832 1833 #ifdef CONFIG_NFSD_PNFS 1834 static const struct nfsd4_layout_ops * 1835 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1836 { 1837 if (!exp->ex_layout_types) { 1838 dprintk("%s: export does not support pNFS\n", __func__); 1839 return NULL; 1840 } 1841 1842 if (layout_type >= LAYOUT_TYPE_MAX || 1843 !(exp->ex_layout_types & (1 << layout_type))) { 1844 dprintk("%s: layout type %d not supported\n", 1845 __func__, layout_type); 1846 return NULL; 1847 } 1848 1849 return nfsd4_layout_ops[layout_type]; 1850 } 1851 1852 static __be32 1853 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1854 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1855 { 1856 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1857 const struct nfsd4_layout_ops *ops; 1858 struct nfsd4_deviceid_map *map; 1859 struct svc_export *exp; 1860 __be32 nfserr; 1861 1862 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1863 __func__, 1864 gdp->gd_layout_type, 1865 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1866 gdp->gd_maxcount); 1867 1868 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1869 if (!map) { 1870 dprintk("%s: couldn't find device ID to export mapping!\n", 1871 __func__); 1872 return nfserr_noent; 1873 } 1874 1875 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1876 if (IS_ERR(exp)) { 1877 dprintk("%s: could not find device id\n", __func__); 1878 return nfserr_noent; 1879 } 1880 1881 nfserr = nfserr_layoutunavailable; 1882 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1883 if (!ops) 1884 goto out; 1885 1886 nfserr = nfs_ok; 1887 if (gdp->gd_maxcount != 0) { 1888 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1889 rqstp, cstate->clp, gdp); 1890 } 1891 1892 gdp->gd_notify_types &= ops->notify_types; 1893 out: 1894 exp_put(exp); 1895 return nfserr; 1896 } 1897 1898 static void 1899 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1900 { 1901 kfree(u->getdeviceinfo.gd_device); 1902 } 1903 1904 static __be32 1905 nfsd4_layoutget(struct svc_rqst *rqstp, 1906 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1907 { 1908 struct nfsd4_layoutget *lgp = &u->layoutget; 1909 struct svc_fh *current_fh = &cstate->current_fh; 1910 const struct nfsd4_layout_ops *ops; 1911 struct nfs4_layout_stateid *ls; 1912 __be32 nfserr; 1913 int accmode = NFSD_MAY_READ_IF_EXEC; 1914 1915 switch (lgp->lg_seg.iomode) { 1916 case IOMODE_READ: 1917 accmode |= NFSD_MAY_READ; 1918 break; 1919 case IOMODE_RW: 1920 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1921 break; 1922 default: 1923 dprintk("%s: invalid iomode %d\n", 1924 __func__, lgp->lg_seg.iomode); 1925 nfserr = nfserr_badiomode; 1926 goto out; 1927 } 1928 1929 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1930 if (nfserr) 1931 goto out; 1932 1933 nfserr = nfserr_layoutunavailable; 1934 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1935 if (!ops) 1936 goto out; 1937 1938 /* 1939 * Verify minlength and range as per RFC5661: 1940 * o If loga_length is less than loga_minlength, 1941 * the metadata server MUST return NFS4ERR_INVAL. 1942 * o If the sum of loga_offset and loga_minlength exceeds 1943 * NFS4_UINT64_MAX, and loga_minlength is not 1944 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1945 * o If the sum of loga_offset and loga_length exceeds 1946 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1947 * the error NFS4ERR_INVAL MUST result. 1948 */ 1949 nfserr = nfserr_inval; 1950 if (lgp->lg_seg.length < lgp->lg_minlength || 1951 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1952 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1953 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1954 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1955 goto out; 1956 if (lgp->lg_seg.length == 0) 1957 goto out; 1958 1959 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1960 true, lgp->lg_layout_type, &ls); 1961 if (nfserr) { 1962 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1963 goto out; 1964 } 1965 1966 nfserr = nfserr_recallconflict; 1967 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1968 goto out_put_stid; 1969 1970 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1971 current_fh, lgp); 1972 if (nfserr) 1973 goto out_put_stid; 1974 1975 nfserr = nfsd4_insert_layout(lgp, ls); 1976 1977 out_put_stid: 1978 mutex_unlock(&ls->ls_mutex); 1979 nfs4_put_stid(&ls->ls_stid); 1980 out: 1981 return nfserr; 1982 } 1983 1984 static void 1985 nfsd4_layoutget_release(union nfsd4_op_u *u) 1986 { 1987 kfree(u->layoutget.lg_content); 1988 } 1989 1990 static __be32 1991 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1992 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1993 { 1994 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1995 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1996 struct svc_fh *current_fh = &cstate->current_fh; 1997 const struct nfsd4_layout_ops *ops; 1998 loff_t new_size = lcp->lc_last_wr + 1; 1999 struct inode *inode; 2000 struct nfs4_layout_stateid *ls; 2001 __be32 nfserr; 2002 2003 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2004 if (nfserr) 2005 goto out; 2006 2007 nfserr = nfserr_layoutunavailable; 2008 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2009 if (!ops) 2010 goto out; 2011 inode = d_inode(current_fh->fh_dentry); 2012 2013 nfserr = nfserr_inval; 2014 if (new_size <= seg->offset) { 2015 dprintk("pnfsd: last write before layout segment\n"); 2016 goto out; 2017 } 2018 if (new_size > seg->offset + seg->length) { 2019 dprintk("pnfsd: last write beyond layout segment\n"); 2020 goto out; 2021 } 2022 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2023 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2024 goto out; 2025 } 2026 2027 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2028 false, lcp->lc_layout_type, 2029 &ls); 2030 if (nfserr) { 2031 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2032 /* fixup error code as per RFC5661 */ 2033 if (nfserr == nfserr_bad_stateid) 2034 nfserr = nfserr_badlayout; 2035 goto out; 2036 } 2037 2038 /* LAYOUTCOMMIT does not require any serialization */ 2039 mutex_unlock(&ls->ls_mutex); 2040 2041 if (new_size > i_size_read(inode)) { 2042 lcp->lc_size_chg = 1; 2043 lcp->lc_newsize = new_size; 2044 } else { 2045 lcp->lc_size_chg = 0; 2046 } 2047 2048 nfserr = ops->proc_layoutcommit(inode, lcp); 2049 nfs4_put_stid(&ls->ls_stid); 2050 out: 2051 return nfserr; 2052 } 2053 2054 static __be32 2055 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2056 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2057 { 2058 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2059 struct svc_fh *current_fh = &cstate->current_fh; 2060 __be32 nfserr; 2061 2062 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2063 if (nfserr) 2064 goto out; 2065 2066 nfserr = nfserr_layoutunavailable; 2067 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2068 goto out; 2069 2070 switch (lrp->lr_seg.iomode) { 2071 case IOMODE_READ: 2072 case IOMODE_RW: 2073 case IOMODE_ANY: 2074 break; 2075 default: 2076 dprintk("%s: invalid iomode %d\n", __func__, 2077 lrp->lr_seg.iomode); 2078 nfserr = nfserr_inval; 2079 goto out; 2080 } 2081 2082 switch (lrp->lr_return_type) { 2083 case RETURN_FILE: 2084 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2085 break; 2086 case RETURN_FSID: 2087 case RETURN_ALL: 2088 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2089 break; 2090 default: 2091 dprintk("%s: invalid return_type %d\n", __func__, 2092 lrp->lr_return_type); 2093 nfserr = nfserr_inval; 2094 break; 2095 } 2096 out: 2097 return nfserr; 2098 } 2099 #endif /* CONFIG_NFSD_PNFS */ 2100 2101 static __be32 2102 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2103 union nfsd4_op_u *u) 2104 { 2105 struct nfsd4_getxattr *getxattr = &u->getxattr; 2106 2107 return nfsd_getxattr(rqstp, &cstate->current_fh, 2108 getxattr->getxa_name, &getxattr->getxa_buf, 2109 &getxattr->getxa_len); 2110 } 2111 2112 static __be32 2113 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2114 union nfsd4_op_u *u) 2115 { 2116 struct nfsd4_setxattr *setxattr = &u->setxattr; 2117 __be32 ret; 2118 2119 if (opens_in_grace(SVC_NET(rqstp))) 2120 return nfserr_grace; 2121 2122 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2123 setxattr->setxa_buf, setxattr->setxa_len, 2124 setxattr->setxa_flags); 2125 2126 if (!ret) 2127 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2128 2129 return ret; 2130 } 2131 2132 static __be32 2133 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2134 union nfsd4_op_u *u) 2135 { 2136 /* 2137 * Get the entire list, then copy out only the user attributes 2138 * in the encode function. 2139 */ 2140 return nfsd_listxattr(rqstp, &cstate->current_fh, 2141 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2142 } 2143 2144 static __be32 2145 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2146 union nfsd4_op_u *u) 2147 { 2148 struct nfsd4_removexattr *removexattr = &u->removexattr; 2149 __be32 ret; 2150 2151 if (opens_in_grace(SVC_NET(rqstp))) 2152 return nfserr_grace; 2153 2154 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2155 removexattr->rmxa_name); 2156 2157 if (!ret) 2158 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2159 2160 return ret; 2161 } 2162 2163 /* 2164 * NULL call. 2165 */ 2166 static __be32 2167 nfsd4_proc_null(struct svc_rqst *rqstp) 2168 { 2169 return rpc_success; 2170 } 2171 2172 static inline void nfsd4_increment_op_stats(u32 opnum) 2173 { 2174 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2175 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]); 2176 } 2177 2178 static const struct nfsd4_operation nfsd4_ops[]; 2179 2180 static const char *nfsd4_op_name(unsigned opnum); 2181 2182 /* 2183 * Enforce NFSv4.1 COMPOUND ordering rules: 2184 * 2185 * Also note, enforced elsewhere: 2186 * - SEQUENCE other than as first op results in 2187 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2188 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2189 * (Enforced in nfsd4_bind_conn_to_session().) 2190 * - DESTROY_SESSION must be the final operation in a compound, if 2191 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2192 * (Enforced in nfsd4_destroy_session().) 2193 */ 2194 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2195 { 2196 struct nfsd4_op *first_op = &args->ops[0]; 2197 2198 /* These ordering requirements don't apply to NFSv4.0: */ 2199 if (args->minorversion == 0) 2200 return nfs_ok; 2201 /* This is weird, but OK, not our problem: */ 2202 if (args->opcnt == 0) 2203 return nfs_ok; 2204 if (first_op->status == nfserr_op_illegal) 2205 return nfs_ok; 2206 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2207 return nfserr_op_not_in_session; 2208 if (first_op->opnum == OP_SEQUENCE) 2209 return nfs_ok; 2210 /* 2211 * So first_op is something allowed outside a session, like 2212 * EXCHANGE_ID; but then it has to be the only op in the 2213 * compound: 2214 */ 2215 if (args->opcnt != 1) 2216 return nfserr_not_only_op; 2217 return nfs_ok; 2218 } 2219 2220 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2221 { 2222 return &nfsd4_ops[op->opnum]; 2223 } 2224 2225 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2226 { 2227 if (op->opnum == OP_ILLEGAL) 2228 return false; 2229 return OPDESC(op)->op_flags & OP_CACHEME; 2230 } 2231 2232 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2233 { 2234 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2235 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2236 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2237 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2238 const struct nfsd4_operation *thisd = OPDESC(this); 2239 const struct nfsd4_operation *nextd; 2240 2241 /* 2242 * Most ops check wronsec on our own; only the putfh-like ops 2243 * have special rules. 2244 */ 2245 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2246 return false; 2247 /* 2248 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2249 * put-filehandle operation if we're not going to use the 2250 * result: 2251 */ 2252 if (argp->opcnt == resp->opcnt) 2253 return false; 2254 if (next->opnum == OP_ILLEGAL) 2255 return false; 2256 nextd = OPDESC(next); 2257 /* 2258 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2259 * errors themselves as necessary; others should check for them 2260 * now: 2261 */ 2262 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2263 } 2264 2265 static void svcxdr_init_encode(struct svc_rqst *rqstp, 2266 struct nfsd4_compoundres *resp) 2267 { 2268 struct xdr_stream *xdr = &resp->xdr; 2269 struct xdr_buf *buf = &rqstp->rq_res; 2270 struct kvec *head = buf->head; 2271 2272 xdr->buf = buf; 2273 xdr->iov = head; 2274 xdr->p = head->iov_base + head->iov_len; 2275 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 2276 /* Tail and page_len should be zero at this point: */ 2277 buf->len = buf->head[0].iov_len; 2278 xdr_reset_scratch_buffer(xdr); 2279 xdr->page_ptr = buf->pages - 1; 2280 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 2281 - rqstp->rq_auth_slack; 2282 } 2283 2284 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2285 static void 2286 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2287 { 2288 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2289 struct nfsd4_copy *copy; 2290 struct nfsd4_putfh *putfh; 2291 int i; 2292 2293 /* traverse all operation and if it's a COPY compound, mark the 2294 * source filehandle to skip verification 2295 */ 2296 for (i = 0; i < args->opcnt; i++) { 2297 op = &args->ops[i]; 2298 if (op->opnum == OP_PUTFH) 2299 current_op = op; 2300 else if (op->opnum == OP_SAVEFH) 2301 saved_op = current_op; 2302 else if (op->opnum == OP_RESTOREFH) 2303 current_op = saved_op; 2304 else if (op->opnum == OP_COPY) { 2305 copy = (struct nfsd4_copy *)&op->u; 2306 if (!saved_op) { 2307 op->status = nfserr_nofilehandle; 2308 return; 2309 } 2310 putfh = (struct nfsd4_putfh *)&saved_op->u; 2311 if (!copy->cp_intra) 2312 putfh->no_verify = true; 2313 } 2314 } 2315 } 2316 #else 2317 static void 2318 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2319 { 2320 } 2321 #endif 2322 2323 /* 2324 * COMPOUND call. 2325 */ 2326 static __be32 2327 nfsd4_proc_compound(struct svc_rqst *rqstp) 2328 { 2329 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2330 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2331 struct nfsd4_op *op; 2332 struct nfsd4_compound_state *cstate = &resp->cstate; 2333 struct svc_fh *current_fh = &cstate->current_fh; 2334 struct svc_fh *save_fh = &cstate->save_fh; 2335 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2336 __be32 status; 2337 2338 svcxdr_init_encode(rqstp, resp); 2339 resp->tagp = resp->xdr.p; 2340 /* reserve space for: taglen, tag, and opcnt */ 2341 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 2342 resp->taglen = args->taglen; 2343 resp->tag = args->tag; 2344 resp->rqstp = rqstp; 2345 cstate->minorversion = args->minorversion; 2346 fh_init(current_fh, NFS4_FHSIZE); 2347 fh_init(save_fh, NFS4_FHSIZE); 2348 /* 2349 * Don't use the deferral mechanism for NFSv4; compounds make it 2350 * too hard to avoid non-idempotency problems. 2351 */ 2352 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2353 2354 /* 2355 * According to RFC3010, this takes precedence over all other errors. 2356 */ 2357 status = nfserr_minor_vers_mismatch; 2358 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2359 goto out; 2360 status = nfserr_resource; 2361 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2362 goto out; 2363 2364 status = nfs41_check_op_ordering(args); 2365 if (status) { 2366 op = &args->ops[0]; 2367 op->status = status; 2368 resp->opcnt = 1; 2369 goto encode_op; 2370 } 2371 check_if_stalefh_allowed(args); 2372 2373 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2374 2375 trace_nfsd_compound(rqstp, args->opcnt); 2376 while (!status && resp->opcnt < args->opcnt) { 2377 op = &args->ops[resp->opcnt++]; 2378 2379 /* 2380 * The XDR decode routines may have pre-set op->status; 2381 * for example, if there is a miscellaneous XDR error 2382 * it will be set to nfserr_bad_xdr. 2383 */ 2384 if (op->status) { 2385 if (op->opnum == OP_OPEN) 2386 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2387 goto encode_op; 2388 } 2389 if (!current_fh->fh_dentry && 2390 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2391 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2392 op->status = nfserr_nofilehandle; 2393 goto encode_op; 2394 } 2395 } else if (current_fh->fh_export && 2396 current_fh->fh_export->ex_fslocs.migrated && 2397 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2398 op->status = nfserr_moved; 2399 goto encode_op; 2400 } 2401 2402 fh_clear_wcc(current_fh); 2403 2404 /* If op is non-idempotent */ 2405 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2406 /* 2407 * Don't execute this op if we couldn't encode a 2408 * succesful reply: 2409 */ 2410 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2411 /* 2412 * Plus if there's another operation, make sure 2413 * we'll have space to at least encode an error: 2414 */ 2415 if (resp->opcnt < args->opcnt) 2416 plen += COMPOUND_ERR_SLACK_SPACE; 2417 op->status = nfsd4_check_resp_size(resp, plen); 2418 } 2419 2420 if (op->status) 2421 goto encode_op; 2422 2423 if (op->opdesc->op_get_currentstateid) 2424 op->opdesc->op_get_currentstateid(cstate, &op->u); 2425 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2426 2427 /* Only from SEQUENCE */ 2428 if (cstate->status == nfserr_replay_cache) { 2429 dprintk("%s NFS4.1 replay from cache\n", __func__); 2430 status = op->status; 2431 goto out; 2432 } 2433 if (!op->status) { 2434 if (op->opdesc->op_set_currentstateid) 2435 op->opdesc->op_set_currentstateid(cstate, &op->u); 2436 2437 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2438 clear_current_stateid(cstate); 2439 2440 if (current_fh->fh_export && 2441 need_wrongsec_check(rqstp)) 2442 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2443 } 2444 encode_op: 2445 if (op->status == nfserr_replay_me) { 2446 op->replay = &cstate->replay_owner->so_replay; 2447 nfsd4_encode_replay(&resp->xdr, op); 2448 status = op->status = op->replay->rp_status; 2449 } else { 2450 nfsd4_encode_operation(resp, op); 2451 status = op->status; 2452 } 2453 2454 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2455 nfsd4_op_name(op->opnum)); 2456 2457 nfsd4_cstate_clear_replay(cstate); 2458 nfsd4_increment_op_stats(op->opnum); 2459 } 2460 2461 fh_put(current_fh); 2462 fh_put(save_fh); 2463 BUG_ON(cstate->replay_owner); 2464 out: 2465 cstate->status = status; 2466 /* Reset deferral mechanism for RPC deferrals */ 2467 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2468 return rpc_success; 2469 } 2470 2471 #define op_encode_hdr_size (2) 2472 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2473 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2474 #define op_encode_change_info_maxsz (5) 2475 #define nfs4_fattr_bitmap_maxsz (4) 2476 2477 /* We'll fall back on returning no lockowner if run out of space: */ 2478 #define op_encode_lockowner_maxsz (0) 2479 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2480 2481 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2482 2483 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2484 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2485 op_encode_ace_maxsz) 2486 2487 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2488 2489 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2490 { 2491 return (op_encode_hdr_size) * sizeof(__be32); 2492 } 2493 2494 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2495 { 2496 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2497 } 2498 2499 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2500 { 2501 /* ac_supported, ac_resp_access */ 2502 return (op_encode_hdr_size + 2)* sizeof(__be32); 2503 } 2504 2505 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2506 { 2507 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2508 } 2509 2510 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2511 { 2512 return (op_encode_hdr_size + op_encode_change_info_maxsz 2513 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2514 } 2515 2516 /* 2517 * Note since this is an idempotent operation we won't insist on failing 2518 * the op prematurely if the estimate is too large. We may turn off splice 2519 * reads unnecessarily. 2520 */ 2521 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2522 struct nfsd4_op *op) 2523 { 2524 u32 *bmap = op->u.getattr.ga_bmval; 2525 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2526 u32 ret = 0; 2527 2528 if (bmap0 & FATTR4_WORD0_ACL) 2529 return svc_max_payload(rqstp); 2530 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2531 return svc_max_payload(rqstp); 2532 2533 if (bmap1 & FATTR4_WORD1_OWNER) { 2534 ret += IDMAP_NAMESZ + 4; 2535 bmap1 &= ~FATTR4_WORD1_OWNER; 2536 } 2537 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2538 ret += IDMAP_NAMESZ + 4; 2539 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2540 } 2541 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2542 ret += NFS4_FHSIZE + 4; 2543 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2544 } 2545 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2546 ret += NFS4_MAXLABELLEN + 12; 2547 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2548 } 2549 /* 2550 * Largest of remaining attributes are 16 bytes (e.g., 2551 * supported_attributes) 2552 */ 2553 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2554 /* bitmask, length */ 2555 ret += 20; 2556 return ret; 2557 } 2558 2559 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2560 { 2561 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2562 } 2563 2564 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2565 { 2566 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2567 * sizeof(__be32); 2568 } 2569 2570 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2571 { 2572 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2573 * sizeof(__be32); 2574 } 2575 2576 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2577 { 2578 return (op_encode_hdr_size + op_encode_stateid_maxsz 2579 + op_encode_change_info_maxsz + 1 2580 + nfs4_fattr_bitmap_maxsz 2581 + op_encode_delegation_maxsz) * sizeof(__be32); 2582 } 2583 2584 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2585 { 2586 u32 maxcount = 0, rlen = 0; 2587 2588 maxcount = svc_max_payload(rqstp); 2589 rlen = min(op->u.read.rd_length, maxcount); 2590 2591 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2592 } 2593 2594 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2595 { 2596 u32 maxcount = svc_max_payload(rqstp); 2597 u32 rlen = min(op->u.read.rd_length, maxcount); 2598 /* 2599 * If we detect that the file changed during hole encoding, then we 2600 * recover by encoding the remaining reply as data. This means we need 2601 * to set aside enough room to encode two data segments. 2602 */ 2603 u32 seg_len = 2 * (1 + 2 + 1); 2604 2605 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2606 } 2607 2608 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2609 { 2610 u32 maxcount = 0, rlen = 0; 2611 2612 maxcount = svc_max_payload(rqstp); 2613 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2614 2615 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2616 XDR_QUADLEN(rlen)) * sizeof(__be32); 2617 } 2618 2619 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2620 { 2621 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2622 } 2623 2624 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2625 { 2626 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2627 * sizeof(__be32); 2628 } 2629 2630 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2631 { 2632 return (op_encode_hdr_size + op_encode_change_info_maxsz 2633 + op_encode_change_info_maxsz) * sizeof(__be32); 2634 } 2635 2636 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2637 struct nfsd4_op *op) 2638 { 2639 return (op_encode_hdr_size 2640 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2641 } 2642 2643 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2644 { 2645 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2646 * sizeof(__be32); 2647 } 2648 2649 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2650 { 2651 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2652 } 2653 2654 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2655 { 2656 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2657 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2658 } 2659 2660 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2661 { 2662 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2663 sizeof(__be32); 2664 } 2665 2666 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2667 { 2668 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2669 } 2670 2671 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2672 { 2673 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2674 1 + 1 + /* eir_flags, spr_how */\ 2675 4 + /* spo_must_enforce & _allow with bitmap */\ 2676 2 + /*eir_server_owner.so_minor_id */\ 2677 /* eir_server_owner.so_major_id<> */\ 2678 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2679 /* eir_server_scope<> */\ 2680 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2681 1 + /* eir_server_impl_id array length */\ 2682 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2683 } 2684 2685 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2686 { 2687 return (op_encode_hdr_size + \ 2688 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2689 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2690 } 2691 2692 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2693 { 2694 return (op_encode_hdr_size + \ 2695 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2696 2 + /* csr_sequence, csr_flags */\ 2697 op_encode_channel_attrs_maxsz + \ 2698 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2699 } 2700 2701 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2702 { 2703 return (op_encode_hdr_size + 2704 1 /* wr_callback */ + 2705 op_encode_stateid_maxsz /* wr_callback */ + 2706 2 /* wr_count */ + 2707 1 /* wr_committed */ + 2708 op_encode_verifier_maxsz + 2709 1 /* cr_consecutive */ + 2710 1 /* cr_synchronous */) * sizeof(__be32); 2711 } 2712 2713 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2714 struct nfsd4_op *op) 2715 { 2716 return (op_encode_hdr_size + 2717 2 /* osr_count */ + 2718 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2719 } 2720 2721 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2722 struct nfsd4_op *op) 2723 { 2724 return (op_encode_hdr_size + 2725 3 /* cnr_lease_time */ + 2726 1 /* We support one cnr_source_server */ + 2727 1 /* cnr_stateid seq */ + 2728 op_encode_stateid_maxsz /* cnr_stateid */ + 2729 1 /* num cnr_source_server*/ + 2730 1 /* nl4_type */ + 2731 1 /* nl4 size */ + 2732 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2733 * sizeof(__be32); 2734 } 2735 2736 #ifdef CONFIG_NFSD_PNFS 2737 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2738 { 2739 u32 maxcount = 0, rlen = 0; 2740 2741 maxcount = svc_max_payload(rqstp); 2742 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2743 2744 return (op_encode_hdr_size + 2745 1 /* gd_layout_type*/ + 2746 XDR_QUADLEN(rlen) + 2747 2 /* gd_notify_types */) * sizeof(__be32); 2748 } 2749 2750 /* 2751 * At this stage we don't really know what layout driver will handle the request, 2752 * so we need to define an arbitrary upper bound here. 2753 */ 2754 #define MAX_LAYOUT_SIZE 128 2755 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2756 { 2757 return (op_encode_hdr_size + 2758 1 /* logr_return_on_close */ + 2759 op_encode_stateid_maxsz + 2760 1 /* nr of layouts */ + 2761 MAX_LAYOUT_SIZE) * sizeof(__be32); 2762 } 2763 2764 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2765 { 2766 return (op_encode_hdr_size + 2767 1 /* locr_newsize */ + 2768 2 /* ns_size */) * sizeof(__be32); 2769 } 2770 2771 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2772 { 2773 return (op_encode_hdr_size + 2774 1 /* lrs_stateid */ + 2775 op_encode_stateid_maxsz) * sizeof(__be32); 2776 } 2777 #endif /* CONFIG_NFSD_PNFS */ 2778 2779 2780 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2781 { 2782 return (op_encode_hdr_size + 3) * sizeof(__be32); 2783 } 2784 2785 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, 2786 struct nfsd4_op *op) 2787 { 2788 u32 maxcount, rlen; 2789 2790 maxcount = svc_max_payload(rqstp); 2791 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); 2792 2793 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2794 } 2795 2796 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp, 2797 struct nfsd4_op *op) 2798 { 2799 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2800 * sizeof(__be32); 2801 } 2802 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp, 2803 struct nfsd4_op *op) 2804 { 2805 u32 maxcount, rlen; 2806 2807 maxcount = svc_max_payload(rqstp); 2808 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); 2809 2810 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2811 } 2812 2813 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, 2814 struct nfsd4_op *op) 2815 { 2816 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2817 * sizeof(__be32); 2818 } 2819 2820 2821 static const struct nfsd4_operation nfsd4_ops[] = { 2822 [OP_ACCESS] = { 2823 .op_func = nfsd4_access, 2824 .op_name = "OP_ACCESS", 2825 .op_rsize_bop = nfsd4_access_rsize, 2826 }, 2827 [OP_CLOSE] = { 2828 .op_func = nfsd4_close, 2829 .op_flags = OP_MODIFIES_SOMETHING, 2830 .op_name = "OP_CLOSE", 2831 .op_rsize_bop = nfsd4_status_stateid_rsize, 2832 .op_get_currentstateid = nfsd4_get_closestateid, 2833 .op_set_currentstateid = nfsd4_set_closestateid, 2834 }, 2835 [OP_COMMIT] = { 2836 .op_func = nfsd4_commit, 2837 .op_flags = OP_MODIFIES_SOMETHING, 2838 .op_name = "OP_COMMIT", 2839 .op_rsize_bop = nfsd4_commit_rsize, 2840 }, 2841 [OP_CREATE] = { 2842 .op_func = nfsd4_create, 2843 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2844 .op_name = "OP_CREATE", 2845 .op_rsize_bop = nfsd4_create_rsize, 2846 }, 2847 [OP_DELEGRETURN] = { 2848 .op_func = nfsd4_delegreturn, 2849 .op_flags = OP_MODIFIES_SOMETHING, 2850 .op_name = "OP_DELEGRETURN", 2851 .op_rsize_bop = nfsd4_only_status_rsize, 2852 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2853 }, 2854 [OP_GETATTR] = { 2855 .op_func = nfsd4_getattr, 2856 .op_flags = ALLOWED_ON_ABSENT_FS, 2857 .op_rsize_bop = nfsd4_getattr_rsize, 2858 .op_name = "OP_GETATTR", 2859 }, 2860 [OP_GETFH] = { 2861 .op_func = nfsd4_getfh, 2862 .op_name = "OP_GETFH", 2863 .op_rsize_bop = nfsd4_getfh_rsize, 2864 }, 2865 [OP_LINK] = { 2866 .op_func = nfsd4_link, 2867 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2868 | OP_CACHEME, 2869 .op_name = "OP_LINK", 2870 .op_rsize_bop = nfsd4_link_rsize, 2871 }, 2872 [OP_LOCK] = { 2873 .op_func = nfsd4_lock, 2874 .op_flags = OP_MODIFIES_SOMETHING | 2875 OP_NONTRIVIAL_ERROR_ENCODE, 2876 .op_name = "OP_LOCK", 2877 .op_rsize_bop = nfsd4_lock_rsize, 2878 .op_set_currentstateid = nfsd4_set_lockstateid, 2879 }, 2880 [OP_LOCKT] = { 2881 .op_func = nfsd4_lockt, 2882 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2883 .op_name = "OP_LOCKT", 2884 .op_rsize_bop = nfsd4_lock_rsize, 2885 }, 2886 [OP_LOCKU] = { 2887 .op_func = nfsd4_locku, 2888 .op_flags = OP_MODIFIES_SOMETHING, 2889 .op_name = "OP_LOCKU", 2890 .op_rsize_bop = nfsd4_status_stateid_rsize, 2891 .op_get_currentstateid = nfsd4_get_lockustateid, 2892 }, 2893 [OP_LOOKUP] = { 2894 .op_func = nfsd4_lookup, 2895 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2896 .op_name = "OP_LOOKUP", 2897 .op_rsize_bop = nfsd4_only_status_rsize, 2898 }, 2899 [OP_LOOKUPP] = { 2900 .op_func = nfsd4_lookupp, 2901 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2902 .op_name = "OP_LOOKUPP", 2903 .op_rsize_bop = nfsd4_only_status_rsize, 2904 }, 2905 [OP_NVERIFY] = { 2906 .op_func = nfsd4_nverify, 2907 .op_name = "OP_NVERIFY", 2908 .op_rsize_bop = nfsd4_only_status_rsize, 2909 }, 2910 [OP_OPEN] = { 2911 .op_func = nfsd4_open, 2912 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2913 .op_name = "OP_OPEN", 2914 .op_rsize_bop = nfsd4_open_rsize, 2915 .op_set_currentstateid = nfsd4_set_openstateid, 2916 }, 2917 [OP_OPEN_CONFIRM] = { 2918 .op_func = nfsd4_open_confirm, 2919 .op_flags = OP_MODIFIES_SOMETHING, 2920 .op_name = "OP_OPEN_CONFIRM", 2921 .op_rsize_bop = nfsd4_status_stateid_rsize, 2922 }, 2923 [OP_OPEN_DOWNGRADE] = { 2924 .op_func = nfsd4_open_downgrade, 2925 .op_flags = OP_MODIFIES_SOMETHING, 2926 .op_name = "OP_OPEN_DOWNGRADE", 2927 .op_rsize_bop = nfsd4_status_stateid_rsize, 2928 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2929 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2930 }, 2931 [OP_PUTFH] = { 2932 .op_func = nfsd4_putfh, 2933 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2934 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2935 .op_name = "OP_PUTFH", 2936 .op_rsize_bop = nfsd4_only_status_rsize, 2937 }, 2938 [OP_PUTPUBFH] = { 2939 .op_func = nfsd4_putrootfh, 2940 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2941 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2942 .op_name = "OP_PUTPUBFH", 2943 .op_rsize_bop = nfsd4_only_status_rsize, 2944 }, 2945 [OP_PUTROOTFH] = { 2946 .op_func = nfsd4_putrootfh, 2947 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2948 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2949 .op_name = "OP_PUTROOTFH", 2950 .op_rsize_bop = nfsd4_only_status_rsize, 2951 }, 2952 [OP_READ] = { 2953 .op_func = nfsd4_read, 2954 .op_release = nfsd4_read_release, 2955 .op_name = "OP_READ", 2956 .op_rsize_bop = nfsd4_read_rsize, 2957 .op_get_currentstateid = nfsd4_get_readstateid, 2958 }, 2959 [OP_READDIR] = { 2960 .op_func = nfsd4_readdir, 2961 .op_name = "OP_READDIR", 2962 .op_rsize_bop = nfsd4_readdir_rsize, 2963 }, 2964 [OP_READLINK] = { 2965 .op_func = nfsd4_readlink, 2966 .op_name = "OP_READLINK", 2967 .op_rsize_bop = nfsd4_readlink_rsize, 2968 }, 2969 [OP_REMOVE] = { 2970 .op_func = nfsd4_remove, 2971 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2972 .op_name = "OP_REMOVE", 2973 .op_rsize_bop = nfsd4_remove_rsize, 2974 }, 2975 [OP_RENAME] = { 2976 .op_func = nfsd4_rename, 2977 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2978 .op_name = "OP_RENAME", 2979 .op_rsize_bop = nfsd4_rename_rsize, 2980 }, 2981 [OP_RENEW] = { 2982 .op_func = nfsd4_renew, 2983 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2984 | OP_MODIFIES_SOMETHING, 2985 .op_name = "OP_RENEW", 2986 .op_rsize_bop = nfsd4_only_status_rsize, 2987 2988 }, 2989 [OP_RESTOREFH] = { 2990 .op_func = nfsd4_restorefh, 2991 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2992 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2993 .op_name = "OP_RESTOREFH", 2994 .op_rsize_bop = nfsd4_only_status_rsize, 2995 }, 2996 [OP_SAVEFH] = { 2997 .op_func = nfsd4_savefh, 2998 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2999 .op_name = "OP_SAVEFH", 3000 .op_rsize_bop = nfsd4_only_status_rsize, 3001 }, 3002 [OP_SECINFO] = { 3003 .op_func = nfsd4_secinfo, 3004 .op_release = nfsd4_secinfo_release, 3005 .op_flags = OP_HANDLES_WRONGSEC, 3006 .op_name = "OP_SECINFO", 3007 .op_rsize_bop = nfsd4_secinfo_rsize, 3008 }, 3009 [OP_SETATTR] = { 3010 .op_func = nfsd4_setattr, 3011 .op_name = "OP_SETATTR", 3012 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3013 | OP_NONTRIVIAL_ERROR_ENCODE, 3014 .op_rsize_bop = nfsd4_setattr_rsize, 3015 .op_get_currentstateid = nfsd4_get_setattrstateid, 3016 }, 3017 [OP_SETCLIENTID] = { 3018 .op_func = nfsd4_setclientid, 3019 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3020 | OP_MODIFIES_SOMETHING | OP_CACHEME 3021 | OP_NONTRIVIAL_ERROR_ENCODE, 3022 .op_name = "OP_SETCLIENTID", 3023 .op_rsize_bop = nfsd4_setclientid_rsize, 3024 }, 3025 [OP_SETCLIENTID_CONFIRM] = { 3026 .op_func = nfsd4_setclientid_confirm, 3027 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3028 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3029 .op_name = "OP_SETCLIENTID_CONFIRM", 3030 .op_rsize_bop = nfsd4_only_status_rsize, 3031 }, 3032 [OP_VERIFY] = { 3033 .op_func = nfsd4_verify, 3034 .op_name = "OP_VERIFY", 3035 .op_rsize_bop = nfsd4_only_status_rsize, 3036 }, 3037 [OP_WRITE] = { 3038 .op_func = nfsd4_write, 3039 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3040 .op_name = "OP_WRITE", 3041 .op_rsize_bop = nfsd4_write_rsize, 3042 .op_get_currentstateid = nfsd4_get_writestateid, 3043 }, 3044 [OP_RELEASE_LOCKOWNER] = { 3045 .op_func = nfsd4_release_lockowner, 3046 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3047 | OP_MODIFIES_SOMETHING, 3048 .op_name = "OP_RELEASE_LOCKOWNER", 3049 .op_rsize_bop = nfsd4_only_status_rsize, 3050 }, 3051 3052 /* NFSv4.1 operations */ 3053 [OP_EXCHANGE_ID] = { 3054 .op_func = nfsd4_exchange_id, 3055 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3056 | OP_MODIFIES_SOMETHING, 3057 .op_name = "OP_EXCHANGE_ID", 3058 .op_rsize_bop = nfsd4_exchange_id_rsize, 3059 }, 3060 [OP_BACKCHANNEL_CTL] = { 3061 .op_func = nfsd4_backchannel_ctl, 3062 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3063 .op_name = "OP_BACKCHANNEL_CTL", 3064 .op_rsize_bop = nfsd4_only_status_rsize, 3065 }, 3066 [OP_BIND_CONN_TO_SESSION] = { 3067 .op_func = nfsd4_bind_conn_to_session, 3068 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3069 | OP_MODIFIES_SOMETHING, 3070 .op_name = "OP_BIND_CONN_TO_SESSION", 3071 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3072 }, 3073 [OP_CREATE_SESSION] = { 3074 .op_func = nfsd4_create_session, 3075 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3076 | OP_MODIFIES_SOMETHING, 3077 .op_name = "OP_CREATE_SESSION", 3078 .op_rsize_bop = nfsd4_create_session_rsize, 3079 }, 3080 [OP_DESTROY_SESSION] = { 3081 .op_func = nfsd4_destroy_session, 3082 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3083 | OP_MODIFIES_SOMETHING, 3084 .op_name = "OP_DESTROY_SESSION", 3085 .op_rsize_bop = nfsd4_only_status_rsize, 3086 }, 3087 [OP_SEQUENCE] = { 3088 .op_func = nfsd4_sequence, 3089 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3090 .op_name = "OP_SEQUENCE", 3091 .op_rsize_bop = nfsd4_sequence_rsize, 3092 }, 3093 [OP_DESTROY_CLIENTID] = { 3094 .op_func = nfsd4_destroy_clientid, 3095 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3096 | OP_MODIFIES_SOMETHING, 3097 .op_name = "OP_DESTROY_CLIENTID", 3098 .op_rsize_bop = nfsd4_only_status_rsize, 3099 }, 3100 [OP_RECLAIM_COMPLETE] = { 3101 .op_func = nfsd4_reclaim_complete, 3102 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3103 .op_name = "OP_RECLAIM_COMPLETE", 3104 .op_rsize_bop = nfsd4_only_status_rsize, 3105 }, 3106 [OP_SECINFO_NO_NAME] = { 3107 .op_func = nfsd4_secinfo_no_name, 3108 .op_release = nfsd4_secinfo_no_name_release, 3109 .op_flags = OP_HANDLES_WRONGSEC, 3110 .op_name = "OP_SECINFO_NO_NAME", 3111 .op_rsize_bop = nfsd4_secinfo_rsize, 3112 }, 3113 [OP_TEST_STATEID] = { 3114 .op_func = nfsd4_test_stateid, 3115 .op_flags = ALLOWED_WITHOUT_FH, 3116 .op_name = "OP_TEST_STATEID", 3117 .op_rsize_bop = nfsd4_test_stateid_rsize, 3118 }, 3119 [OP_FREE_STATEID] = { 3120 .op_func = nfsd4_free_stateid, 3121 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3122 .op_name = "OP_FREE_STATEID", 3123 .op_get_currentstateid = nfsd4_get_freestateid, 3124 .op_rsize_bop = nfsd4_only_status_rsize, 3125 }, 3126 #ifdef CONFIG_NFSD_PNFS 3127 [OP_GETDEVICEINFO] = { 3128 .op_func = nfsd4_getdeviceinfo, 3129 .op_release = nfsd4_getdeviceinfo_release, 3130 .op_flags = ALLOWED_WITHOUT_FH, 3131 .op_name = "OP_GETDEVICEINFO", 3132 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3133 }, 3134 [OP_LAYOUTGET] = { 3135 .op_func = nfsd4_layoutget, 3136 .op_release = nfsd4_layoutget_release, 3137 .op_flags = OP_MODIFIES_SOMETHING, 3138 .op_name = "OP_LAYOUTGET", 3139 .op_rsize_bop = nfsd4_layoutget_rsize, 3140 }, 3141 [OP_LAYOUTCOMMIT] = { 3142 .op_func = nfsd4_layoutcommit, 3143 .op_flags = OP_MODIFIES_SOMETHING, 3144 .op_name = "OP_LAYOUTCOMMIT", 3145 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3146 }, 3147 [OP_LAYOUTRETURN] = { 3148 .op_func = nfsd4_layoutreturn, 3149 .op_flags = OP_MODIFIES_SOMETHING, 3150 .op_name = "OP_LAYOUTRETURN", 3151 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3152 }, 3153 #endif /* CONFIG_NFSD_PNFS */ 3154 3155 /* NFSv4.2 operations */ 3156 [OP_ALLOCATE] = { 3157 .op_func = nfsd4_allocate, 3158 .op_flags = OP_MODIFIES_SOMETHING, 3159 .op_name = "OP_ALLOCATE", 3160 .op_rsize_bop = nfsd4_only_status_rsize, 3161 }, 3162 [OP_DEALLOCATE] = { 3163 .op_func = nfsd4_deallocate, 3164 .op_flags = OP_MODIFIES_SOMETHING, 3165 .op_name = "OP_DEALLOCATE", 3166 .op_rsize_bop = nfsd4_only_status_rsize, 3167 }, 3168 [OP_CLONE] = { 3169 .op_func = nfsd4_clone, 3170 .op_flags = OP_MODIFIES_SOMETHING, 3171 .op_name = "OP_CLONE", 3172 .op_rsize_bop = nfsd4_only_status_rsize, 3173 }, 3174 [OP_COPY] = { 3175 .op_func = nfsd4_copy, 3176 .op_flags = OP_MODIFIES_SOMETHING, 3177 .op_name = "OP_COPY", 3178 .op_rsize_bop = nfsd4_copy_rsize, 3179 }, 3180 [OP_READ_PLUS] = { 3181 .op_func = nfsd4_read, 3182 .op_release = nfsd4_read_release, 3183 .op_name = "OP_READ_PLUS", 3184 .op_rsize_bop = nfsd4_read_plus_rsize, 3185 .op_get_currentstateid = nfsd4_get_readstateid, 3186 }, 3187 [OP_SEEK] = { 3188 .op_func = nfsd4_seek, 3189 .op_name = "OP_SEEK", 3190 .op_rsize_bop = nfsd4_seek_rsize, 3191 }, 3192 [OP_OFFLOAD_STATUS] = { 3193 .op_func = nfsd4_offload_status, 3194 .op_name = "OP_OFFLOAD_STATUS", 3195 .op_rsize_bop = nfsd4_offload_status_rsize, 3196 }, 3197 [OP_OFFLOAD_CANCEL] = { 3198 .op_func = nfsd4_offload_cancel, 3199 .op_flags = OP_MODIFIES_SOMETHING, 3200 .op_name = "OP_OFFLOAD_CANCEL", 3201 .op_rsize_bop = nfsd4_only_status_rsize, 3202 }, 3203 [OP_COPY_NOTIFY] = { 3204 .op_func = nfsd4_copy_notify, 3205 .op_flags = OP_MODIFIES_SOMETHING, 3206 .op_name = "OP_COPY_NOTIFY", 3207 .op_rsize_bop = nfsd4_copy_notify_rsize, 3208 }, 3209 [OP_GETXATTR] = { 3210 .op_func = nfsd4_getxattr, 3211 .op_name = "OP_GETXATTR", 3212 .op_rsize_bop = nfsd4_getxattr_rsize, 3213 }, 3214 [OP_SETXATTR] = { 3215 .op_func = nfsd4_setxattr, 3216 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3217 .op_name = "OP_SETXATTR", 3218 .op_rsize_bop = nfsd4_setxattr_rsize, 3219 }, 3220 [OP_LISTXATTRS] = { 3221 .op_func = nfsd4_listxattrs, 3222 .op_name = "OP_LISTXATTRS", 3223 .op_rsize_bop = nfsd4_listxattrs_rsize, 3224 }, 3225 [OP_REMOVEXATTR] = { 3226 .op_func = nfsd4_removexattr, 3227 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3228 .op_name = "OP_REMOVEXATTR", 3229 .op_rsize_bop = nfsd4_removexattr_rsize, 3230 }, 3231 }; 3232 3233 /** 3234 * nfsd4_spo_must_allow - Determine if the compound op contains an 3235 * operation that is allowed to be sent with machine credentials 3236 * 3237 * @rqstp: a pointer to the struct svc_rqst 3238 * 3239 * Checks to see if the compound contains a spo_must_allow op 3240 * and confirms that it was sent with the proper machine creds. 3241 */ 3242 3243 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3244 { 3245 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3246 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3247 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3248 struct nfsd4_compound_state *cstate = &resp->cstate; 3249 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3250 u32 opiter; 3251 3252 if (!cstate->minorversion) 3253 return false; 3254 3255 if (cstate->spo_must_allowed) 3256 return true; 3257 3258 opiter = resp->opcnt; 3259 while (opiter < argp->opcnt) { 3260 this = &argp->ops[opiter++]; 3261 if (test_bit(this->opnum, allow->u.longs) && 3262 cstate->clp->cl_mach_cred && 3263 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3264 cstate->spo_must_allowed = true; 3265 return true; 3266 } 3267 } 3268 cstate->spo_must_allowed = false; 3269 return false; 3270 } 3271 3272 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3273 { 3274 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3275 return op_encode_hdr_size * sizeof(__be32); 3276 3277 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3278 return OPDESC(op)->op_rsize_bop(rqstp, op); 3279 } 3280 3281 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3282 { 3283 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3284 pr_err("unable to encode reply to nonidempotent op %u (%s)\n", 3285 op->opnum, nfsd4_op_name(op->opnum)); 3286 WARN_ON_ONCE(1); 3287 } 3288 } 3289 3290 static const char *nfsd4_op_name(unsigned opnum) 3291 { 3292 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3293 return nfsd4_ops[opnum].op_name; 3294 return "unknown_operation"; 3295 } 3296 3297 static const struct svc_procedure nfsd_procedures4[2] = { 3298 [NFSPROC4_NULL] = { 3299 .pc_func = nfsd4_proc_null, 3300 .pc_decode = nfssvc_decode_voidarg, 3301 .pc_encode = nfssvc_encode_voidres, 3302 .pc_argsize = sizeof(struct nfsd_voidargs), 3303 .pc_ressize = sizeof(struct nfsd_voidres), 3304 .pc_cachetype = RC_NOCACHE, 3305 .pc_xdrressize = 1, 3306 .pc_name = "NULL", 3307 }, 3308 [NFSPROC4_COMPOUND] = { 3309 .pc_func = nfsd4_proc_compound, 3310 .pc_decode = nfs4svc_decode_compoundargs, 3311 .pc_encode = nfs4svc_encode_compoundres, 3312 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3313 .pc_ressize = sizeof(struct nfsd4_compoundres), 3314 .pc_release = nfsd4_release_compoundargs, 3315 .pc_cachetype = RC_NOCACHE, 3316 .pc_xdrressize = NFSD_BUFSIZE/4, 3317 .pc_name = "COMPOUND", 3318 }, 3319 }; 3320 3321 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 3322 const struct svc_version nfsd_version4 = { 3323 .vs_vers = 4, 3324 .vs_nproc = 2, 3325 .vs_proc = nfsd_procedures4, 3326 .vs_count = nfsd_count3, 3327 .vs_dispatch = nfsd_dispatch, 3328 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3329 .vs_rpcb_optnl = true, 3330 .vs_need_cong_ctrl = true, 3331 }; 3332 3333 /* 3334 * Local variables: 3335 * c-basic-offset: 8 3336 * End: 3337 */ 3338