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, 382 &cstate->session->se_client->cl_flags) && 383 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 384 return nfserr_grace; 385 386 if (nfsd4_has_session(cstate)) 387 copy_clientid(&open->op_clientid, cstate->session); 388 389 /* check seqid for replay. set nfs4_owner */ 390 status = nfsd4_process_open1(cstate, open, nn); 391 if (status == nfserr_replay_me) { 392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 393 fh_put(&cstate->current_fh); 394 fh_copy_shallow(&cstate->current_fh.fh_handle, 395 &rp->rp_openfh); 396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 397 if (status) 398 dprintk("nfsd4_open: replay failed" 399 " restoring previous filehandle\n"); 400 else 401 status = nfserr_replay_me; 402 } 403 if (status) 404 goto out; 405 if (open->op_xdr_error) { 406 status = open->op_xdr_error; 407 goto out; 408 } 409 410 status = nfsd4_check_open_attributes(rqstp, cstate, open); 411 if (status) 412 goto out; 413 414 /* Openowner is now set, so sequence id will get bumped. Now we need 415 * these checks before we do any creates: */ 416 status = nfserr_grace; 417 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 418 goto out; 419 status = nfserr_no_grace; 420 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 423 switch (open->op_claim_type) { 424 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 425 case NFS4_OPEN_CLAIM_NULL: 426 status = do_open_lookup(rqstp, cstate, open, &resfh); 427 if (status) 428 goto out; 429 break; 430 case NFS4_OPEN_CLAIM_PREVIOUS: 431 status = nfs4_check_open_reclaim(&open->op_clientid, 432 cstate, nn); 433 if (status) 434 goto out; 435 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 436 reclaim = true; 437 fallthrough; 438 case NFS4_OPEN_CLAIM_FH: 439 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 440 status = do_open_fhandle(rqstp, cstate, open); 441 if (status) 442 goto out; 443 resfh = &cstate->current_fh; 444 break; 445 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 446 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 447 dprintk("NFSD: unsupported OPEN claim type %d\n", 448 open->op_claim_type); 449 status = nfserr_notsupp; 450 goto out; 451 default: 452 dprintk("NFSD: Invalid OPEN claim type %d\n", 453 open->op_claim_type); 454 status = nfserr_inval; 455 goto out; 456 } 457 /* 458 * nfsd4_process_open2() does the actual opening of the file. If 459 * successful, it (1) truncates the file if open->op_truncate was 460 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 461 */ 462 status = nfsd4_process_open2(rqstp, resfh, open); 463 WARN(status && open->op_created, 464 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 465 be32_to_cpu(status)); 466 if (reclaim && !status) 467 nn->somebody_reclaimed = true; 468 out: 469 if (resfh && resfh != &cstate->current_fh) { 470 fh_dup2(&cstate->current_fh, resfh); 471 fh_put(resfh); 472 kfree(resfh); 473 } 474 nfsd4_cleanup_open_state(cstate, open); 475 nfsd4_bump_seqid(cstate, status); 476 return status; 477 } 478 479 /* 480 * OPEN is the only seqid-mutating operation whose decoding can fail 481 * with a seqid-mutating error (specifically, decoding of user names in 482 * the attributes). Therefore we have to do some processing to look up 483 * the stateowner so that we can bump the seqid. 484 */ 485 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 486 { 487 struct nfsd4_open *open = &op->u.open; 488 489 if (!seqid_mutating_err(ntohl(op->status))) 490 return op->status; 491 if (nfsd4_has_session(cstate)) 492 return op->status; 493 open->op_xdr_error = op->status; 494 return nfsd4_open(rqstp, cstate, &op->u); 495 } 496 497 /* 498 * filehandle-manipulating ops. 499 */ 500 static __be32 501 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 502 union nfsd4_op_u *u) 503 { 504 u->getfh = &cstate->current_fh; 505 return nfs_ok; 506 } 507 508 static __be32 509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 union nfsd4_op_u *u) 511 { 512 struct nfsd4_putfh *putfh = &u->putfh; 513 __be32 ret; 514 515 fh_put(&cstate->current_fh); 516 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 517 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 518 putfh->pf_fhlen); 519 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 520 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 521 if (ret == nfserr_stale && putfh->no_verify) { 522 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 523 ret = 0; 524 } 525 #endif 526 return ret; 527 } 528 529 static __be32 530 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 531 union nfsd4_op_u *u) 532 { 533 __be32 status; 534 535 fh_put(&cstate->current_fh); 536 status = exp_pseudoroot(rqstp, &cstate->current_fh); 537 return status; 538 } 539 540 static __be32 541 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 542 union nfsd4_op_u *u) 543 { 544 if (!cstate->save_fh.fh_dentry) 545 return nfserr_restorefh; 546 547 fh_dup2(&cstate->current_fh, &cstate->save_fh); 548 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 549 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 550 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 551 } 552 return nfs_ok; 553 } 554 555 static __be32 556 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 557 union nfsd4_op_u *u) 558 { 559 fh_dup2(&cstate->save_fh, &cstate->current_fh); 560 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 561 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 562 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 563 } 564 return nfs_ok; 565 } 566 567 /* 568 * misc nfsv4 ops 569 */ 570 static __be32 571 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 572 union nfsd4_op_u *u) 573 { 574 struct nfsd4_access *access = &u->access; 575 u32 access_full; 576 577 access_full = NFS3_ACCESS_FULL; 578 if (cstate->minorversion >= 2) 579 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | 580 NFS4_ACCESS_XAWRITE; 581 582 if (access->ac_req_access & ~access_full) 583 return nfserr_inval; 584 585 access->ac_resp_access = access->ac_req_access; 586 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 587 &access->ac_supported); 588 } 589 590 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 591 { 592 __be32 *verf = (__be32 *)verifier->data; 593 594 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 595 596 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); 597 } 598 599 static __be32 600 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 601 union nfsd4_op_u *u) 602 { 603 struct nfsd4_commit *commit = &u->commit; 604 605 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 606 commit->co_count, 607 (__be32 *)commit->co_verf.data); 608 } 609 610 static __be32 611 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 612 union nfsd4_op_u *u) 613 { 614 struct nfsd4_create *create = &u->create; 615 struct svc_fh resfh; 616 __be32 status; 617 dev_t rdev; 618 619 fh_init(&resfh, NFS4_FHSIZE); 620 621 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 622 if (status) 623 return status; 624 625 status = check_attr_support(rqstp, cstate, create->cr_bmval, 626 nfsd_attrmask); 627 if (status) 628 return status; 629 630 current->fs->umask = create->cr_umask; 631 switch (create->cr_type) { 632 case NF4LNK: 633 status = nfsd_symlink(rqstp, &cstate->current_fh, 634 create->cr_name, create->cr_namelen, 635 create->cr_data, &resfh); 636 break; 637 638 case NF4BLK: 639 status = nfserr_inval; 640 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 641 if (MAJOR(rdev) != create->cr_specdata1 || 642 MINOR(rdev) != create->cr_specdata2) 643 goto out_umask; 644 status = nfsd_create(rqstp, &cstate->current_fh, 645 create->cr_name, create->cr_namelen, 646 &create->cr_iattr, S_IFBLK, rdev, &resfh); 647 break; 648 649 case NF4CHR: 650 status = nfserr_inval; 651 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 652 if (MAJOR(rdev) != create->cr_specdata1 || 653 MINOR(rdev) != create->cr_specdata2) 654 goto out_umask; 655 status = nfsd_create(rqstp, &cstate->current_fh, 656 create->cr_name, create->cr_namelen, 657 &create->cr_iattr,S_IFCHR, rdev, &resfh); 658 break; 659 660 case NF4SOCK: 661 status = nfsd_create(rqstp, &cstate->current_fh, 662 create->cr_name, create->cr_namelen, 663 &create->cr_iattr, S_IFSOCK, 0, &resfh); 664 break; 665 666 case NF4FIFO: 667 status = nfsd_create(rqstp, &cstate->current_fh, 668 create->cr_name, create->cr_namelen, 669 &create->cr_iattr, S_IFIFO, 0, &resfh); 670 break; 671 672 case NF4DIR: 673 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 674 status = nfsd_create(rqstp, &cstate->current_fh, 675 create->cr_name, create->cr_namelen, 676 &create->cr_iattr, S_IFDIR, 0, &resfh); 677 break; 678 679 default: 680 status = nfserr_badtype; 681 } 682 683 if (status) 684 goto out; 685 686 if (create->cr_label.len) 687 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 688 689 if (create->cr_acl != NULL) 690 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 691 create->cr_bmval); 692 693 fh_unlock(&cstate->current_fh); 694 set_change_info(&create->cr_cinfo, &cstate->current_fh); 695 fh_dup2(&cstate->current_fh, &resfh); 696 out: 697 fh_put(&resfh); 698 out_umask: 699 current->fs->umask = 0; 700 return status; 701 } 702 703 static __be32 704 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 705 union nfsd4_op_u *u) 706 { 707 struct nfsd4_getattr *getattr = &u->getattr; 708 __be32 status; 709 710 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 711 if (status) 712 return status; 713 714 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 715 return nfserr_inval; 716 717 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 718 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 719 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 720 721 getattr->ga_fhp = &cstate->current_fh; 722 return nfs_ok; 723 } 724 725 static __be32 726 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 727 union nfsd4_op_u *u) 728 { 729 struct nfsd4_link *link = &u->link; 730 __be32 status; 731 732 status = nfsd_link(rqstp, &cstate->current_fh, 733 link->li_name, link->li_namelen, &cstate->save_fh); 734 if (!status) 735 set_change_info(&link->li_cinfo, &cstate->current_fh); 736 return status; 737 } 738 739 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 740 { 741 struct svc_fh tmp_fh; 742 __be32 ret; 743 744 fh_init(&tmp_fh, NFS4_FHSIZE); 745 ret = exp_pseudoroot(rqstp, &tmp_fh); 746 if (ret) 747 return ret; 748 if (tmp_fh.fh_dentry == fh->fh_dentry) { 749 fh_put(&tmp_fh); 750 return nfserr_noent; 751 } 752 fh_put(&tmp_fh); 753 return nfsd_lookup(rqstp, fh, "..", 2, fh); 754 } 755 756 static __be32 757 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 758 union nfsd4_op_u *u) 759 { 760 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 761 } 762 763 static __be32 764 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 765 union nfsd4_op_u *u) 766 { 767 return nfsd_lookup(rqstp, &cstate->current_fh, 768 u->lookup.lo_name, u->lookup.lo_len, 769 &cstate->current_fh); 770 } 771 772 static __be32 773 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 774 union nfsd4_op_u *u) 775 { 776 struct nfsd4_read *read = &u->read; 777 __be32 status; 778 779 read->rd_nf = NULL; 780 if (read->rd_offset >= OFFSET_MAX) 781 return nfserr_inval; 782 783 trace_nfsd_read_start(rqstp, &cstate->current_fh, 784 read->rd_offset, read->rd_length); 785 786 /* 787 * If we do a zero copy read, then a client will see read data 788 * that reflects the state of the file *after* performing the 789 * following compound. 790 * 791 * To ensure proper ordering, we therefore turn off zero copy if 792 * the client wants us to do more in this compound: 793 */ 794 if (!nfsd4_last_compound_op(rqstp)) 795 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 796 797 /* check stateid */ 798 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 799 &read->rd_stateid, RD_STATE, 800 &read->rd_nf, NULL); 801 if (status) { 802 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 803 goto out; 804 } 805 status = nfs_ok; 806 out: 807 read->rd_rqstp = rqstp; 808 read->rd_fhp = &cstate->current_fh; 809 return status; 810 } 811 812 813 static void 814 nfsd4_read_release(union nfsd4_op_u *u) 815 { 816 if (u->read.rd_nf) 817 nfsd_file_put(u->read.rd_nf); 818 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 819 u->read.rd_offset, u->read.rd_length); 820 } 821 822 static __be32 823 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 824 union nfsd4_op_u *u) 825 { 826 struct nfsd4_readdir *readdir = &u->readdir; 827 u64 cookie = readdir->rd_cookie; 828 static const nfs4_verifier zeroverf; 829 830 /* no need to check permission - this will be done in nfsd_readdir() */ 831 832 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 833 return nfserr_inval; 834 835 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 836 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 837 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 838 839 if ((cookie == 1) || (cookie == 2) || 840 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 841 return nfserr_bad_cookie; 842 843 readdir->rd_rqstp = rqstp; 844 readdir->rd_fhp = &cstate->current_fh; 845 return nfs_ok; 846 } 847 848 static __be32 849 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 850 union nfsd4_op_u *u) 851 { 852 u->readlink.rl_rqstp = rqstp; 853 u->readlink.rl_fhp = &cstate->current_fh; 854 return nfs_ok; 855 } 856 857 static __be32 858 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 859 union nfsd4_op_u *u) 860 { 861 struct nfsd4_remove *remove = &u->remove; 862 __be32 status; 863 864 if (opens_in_grace(SVC_NET(rqstp))) 865 return nfserr_grace; 866 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 867 remove->rm_name, remove->rm_namelen); 868 if (!status) { 869 fh_unlock(&cstate->current_fh); 870 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 871 } 872 return status; 873 } 874 875 static __be32 876 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 877 union nfsd4_op_u *u) 878 { 879 struct nfsd4_rename *rename = &u->rename; 880 __be32 status; 881 882 if (opens_in_grace(SVC_NET(rqstp))) 883 return nfserr_grace; 884 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 885 rename->rn_snamelen, &cstate->current_fh, 886 rename->rn_tname, rename->rn_tnamelen); 887 if (status) 888 return status; 889 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 890 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 891 return nfs_ok; 892 } 893 894 static __be32 895 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 896 union nfsd4_op_u *u) 897 { 898 struct nfsd4_secinfo *secinfo = &u->secinfo; 899 struct svc_export *exp; 900 struct dentry *dentry; 901 __be32 err; 902 903 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 904 if (err) 905 return err; 906 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 907 secinfo->si_name, secinfo->si_namelen, 908 &exp, &dentry); 909 if (err) 910 return err; 911 fh_unlock(&cstate->current_fh); 912 if (d_really_is_negative(dentry)) { 913 exp_put(exp); 914 err = nfserr_noent; 915 } else 916 secinfo->si_exp = exp; 917 dput(dentry); 918 if (cstate->minorversion) 919 /* See rfc 5661 section 2.6.3.1.1.8 */ 920 fh_put(&cstate->current_fh); 921 return err; 922 } 923 924 static __be32 925 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 926 union nfsd4_op_u *u) 927 { 928 __be32 err; 929 930 switch (u->secinfo_no_name.sin_style) { 931 case NFS4_SECINFO_STYLE4_CURRENT_FH: 932 break; 933 case NFS4_SECINFO_STYLE4_PARENT: 934 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 935 if (err) 936 return err; 937 break; 938 default: 939 return nfserr_inval; 940 } 941 942 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 943 fh_put(&cstate->current_fh); 944 return nfs_ok; 945 } 946 947 static void 948 nfsd4_secinfo_release(union nfsd4_op_u *u) 949 { 950 if (u->secinfo.si_exp) 951 exp_put(u->secinfo.si_exp); 952 } 953 954 static void 955 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 956 { 957 if (u->secinfo_no_name.sin_exp) 958 exp_put(u->secinfo_no_name.sin_exp); 959 } 960 961 static __be32 962 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 963 union nfsd4_op_u *u) 964 { 965 struct nfsd4_setattr *setattr = &u->setattr; 966 __be32 status = nfs_ok; 967 int err; 968 969 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 970 status = nfs4_preprocess_stateid_op(rqstp, cstate, 971 &cstate->current_fh, &setattr->sa_stateid, 972 WR_STATE, NULL, NULL); 973 if (status) { 974 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 975 return status; 976 } 977 } 978 err = fh_want_write(&cstate->current_fh); 979 if (err) 980 return nfserrno(err); 981 status = nfs_ok; 982 983 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 984 nfsd_attrmask); 985 if (status) 986 goto out; 987 988 if (setattr->sa_acl != NULL) 989 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 990 setattr->sa_acl); 991 if (status) 992 goto out; 993 if (setattr->sa_label.len) 994 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 995 &setattr->sa_label); 996 if (status) 997 goto out; 998 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 999 0, (time64_t)0); 1000 out: 1001 fh_drop_write(&cstate->current_fh); 1002 return status; 1003 } 1004 1005 static __be32 1006 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1007 union nfsd4_op_u *u) 1008 { 1009 struct nfsd4_write *write = &u->write; 1010 stateid_t *stateid = &write->wr_stateid; 1011 struct nfsd_file *nf = NULL; 1012 __be32 status = nfs_ok; 1013 unsigned long cnt; 1014 int nvecs; 1015 1016 if (write->wr_offset >= OFFSET_MAX) 1017 return nfserr_inval; 1018 1019 cnt = write->wr_buflen; 1020 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1021 write->wr_offset, cnt); 1022 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1023 stateid, WR_STATE, &nf, NULL); 1024 if (status) { 1025 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1026 return status; 1027 } 1028 1029 write->wr_how_written = write->wr_stable_how; 1030 1031 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages, 1032 write->wr_payload.head, write->wr_buflen); 1033 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1034 1035 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1036 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1037 write->wr_how_written, 1038 (__be32 *)write->wr_verifier.data); 1039 nfsd_file_put(nf); 1040 1041 write->wr_bytes_written = cnt; 1042 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1043 write->wr_offset, cnt); 1044 return status; 1045 } 1046 1047 static __be32 1048 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1049 stateid_t *src_stateid, struct nfsd_file **src, 1050 stateid_t *dst_stateid, struct nfsd_file **dst) 1051 { 1052 __be32 status; 1053 1054 if (!cstate->save_fh.fh_dentry) 1055 return nfserr_nofilehandle; 1056 1057 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1058 src_stateid, RD_STATE, src, NULL); 1059 if (status) { 1060 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1061 goto out; 1062 } 1063 1064 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1065 dst_stateid, WR_STATE, dst, NULL); 1066 if (status) { 1067 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1068 goto out_put_src; 1069 } 1070 1071 /* fix up for NFS-specific error code */ 1072 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1073 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1074 status = nfserr_wrong_type; 1075 goto out_put_dst; 1076 } 1077 1078 out: 1079 return status; 1080 out_put_dst: 1081 nfsd_file_put(*dst); 1082 out_put_src: 1083 nfsd_file_put(*src); 1084 goto out; 1085 } 1086 1087 static __be32 1088 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1089 union nfsd4_op_u *u) 1090 { 1091 struct nfsd4_clone *clone = &u->clone; 1092 struct nfsd_file *src, *dst; 1093 __be32 status; 1094 1095 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1096 &clone->cl_dst_stateid, &dst); 1097 if (status) 1098 goto out; 1099 1100 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1101 dst, clone->cl_dst_pos, clone->cl_count, 1102 EX_ISSYNC(cstate->current_fh.fh_export)); 1103 1104 nfsd_file_put(dst); 1105 nfsd_file_put(src); 1106 out: 1107 return status; 1108 } 1109 1110 void nfs4_put_copy(struct nfsd4_copy *copy) 1111 { 1112 if (!refcount_dec_and_test(©->refcount)) 1113 return; 1114 kfree(copy); 1115 } 1116 1117 static bool 1118 check_and_set_stop_copy(struct nfsd4_copy *copy) 1119 { 1120 bool value; 1121 1122 spin_lock(©->cp_clp->async_lock); 1123 value = copy->stopped; 1124 if (!copy->stopped) 1125 copy->stopped = true; 1126 spin_unlock(©->cp_clp->async_lock); 1127 return value; 1128 } 1129 1130 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1131 { 1132 /* only 1 thread should stop the copy */ 1133 if (!check_and_set_stop_copy(copy)) 1134 kthread_stop(copy->copy_task); 1135 nfs4_put_copy(copy); 1136 } 1137 1138 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1139 { 1140 struct nfsd4_copy *copy = NULL; 1141 1142 spin_lock(&clp->async_lock); 1143 if (!list_empty(&clp->async_copies)) { 1144 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1145 copies); 1146 refcount_inc(©->refcount); 1147 } 1148 spin_unlock(&clp->async_lock); 1149 return copy; 1150 } 1151 1152 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1153 { 1154 struct nfsd4_copy *copy; 1155 1156 while ((copy = nfsd4_get_copy(clp)) != NULL) 1157 nfsd4_stop_copy(copy); 1158 } 1159 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 1160 1161 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1162 struct nfs_fh *src_fh, 1163 nfs4_stateid *stateid); 1164 extern void nfs42_ssc_close(struct file *filep); 1165 1166 extern void nfs_sb_deactive(struct super_block *sb); 1167 1168 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1169 1170 /* 1171 * Support one copy source server for now. 1172 */ 1173 static __be32 1174 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1175 struct vfsmount **mount) 1176 { 1177 struct file_system_type *type; 1178 struct vfsmount *ss_mnt; 1179 struct nfs42_netaddr *naddr; 1180 struct sockaddr_storage tmp_addr; 1181 size_t tmp_addrlen, match_netid_len = 3; 1182 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1183 char *ipaddr, *dev_name, *raw_data; 1184 int len, raw_len; 1185 __be32 status = nfserr_inval; 1186 1187 naddr = &nss->u.nl4_addr; 1188 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1189 naddr->addr_len, 1190 (struct sockaddr *)&tmp_addr, 1191 sizeof(tmp_addr)); 1192 if (tmp_addrlen == 0) 1193 goto out_err; 1194 1195 if (tmp_addr.ss_family == AF_INET6) { 1196 startsep = "["; 1197 endsep = "]"; 1198 match_netid = "tcp6"; 1199 match_netid_len = 4; 1200 } 1201 1202 if (naddr->netid_len != match_netid_len || 1203 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1204 goto out_err; 1205 1206 /* Construct the raw data for the vfs_kern_mount call */ 1207 len = RPC_MAX_ADDRBUFLEN + 1; 1208 ipaddr = kzalloc(len, GFP_KERNEL); 1209 if (!ipaddr) 1210 goto out_err; 1211 1212 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1213 1214 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1215 1216 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1217 raw_data = kzalloc(raw_len, GFP_KERNEL); 1218 if (!raw_data) 1219 goto out_free_ipaddr; 1220 1221 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1222 1223 status = nfserr_nodev; 1224 type = get_fs_type("nfs"); 1225 if (!type) 1226 goto out_free_rawdata; 1227 1228 /* Set the server:<export> for the vfs_kern_mount call */ 1229 dev_name = kzalloc(len + 5, GFP_KERNEL); 1230 if (!dev_name) 1231 goto out_free_rawdata; 1232 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1233 1234 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1235 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1236 module_put(type->owner); 1237 if (IS_ERR(ss_mnt)) 1238 goto out_free_devname; 1239 1240 status = 0; 1241 *mount = ss_mnt; 1242 1243 out_free_devname: 1244 kfree(dev_name); 1245 out_free_rawdata: 1246 kfree(raw_data); 1247 out_free_ipaddr: 1248 kfree(ipaddr); 1249 out_err: 1250 return status; 1251 } 1252 1253 static void 1254 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1255 { 1256 nfs_do_sb_deactive(ss_mnt->mnt_sb); 1257 mntput(ss_mnt); 1258 } 1259 1260 /* 1261 * Verify COPY destination stateid. 1262 * 1263 * Connect to the source server with NFSv4.1. 1264 * Create the source struct file for nfsd_copy_range. 1265 * Called with COPY cstate: 1266 * SAVED_FH: source filehandle 1267 * CURRENT_FH: destination filehandle 1268 */ 1269 static __be32 1270 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1271 struct nfsd4_compound_state *cstate, 1272 struct nfsd4_copy *copy, struct vfsmount **mount) 1273 { 1274 struct svc_fh *s_fh = NULL; 1275 stateid_t *s_stid = ©->cp_src_stateid; 1276 __be32 status = nfserr_inval; 1277 1278 /* Verify the destination stateid and set dst struct file*/ 1279 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1280 ©->cp_dst_stateid, 1281 WR_STATE, ©->nf_dst, NULL); 1282 if (status) 1283 goto out; 1284 1285 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); 1286 if (status) 1287 goto out; 1288 1289 s_fh = &cstate->save_fh; 1290 1291 copy->c_fh.size = s_fh->fh_handle.fh_size; 1292 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); 1293 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1294 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1295 sizeof(stateid_opaque_t)); 1296 1297 status = 0; 1298 out: 1299 return status; 1300 } 1301 1302 static void 1303 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1304 struct nfsd_file *dst) 1305 { 1306 nfs42_ssc_close(src->nf_file); 1307 /* 'src' is freed by nfsd4_do_async_copy */ 1308 nfsd_file_put(dst); 1309 mntput(ss_mnt); 1310 } 1311 1312 #else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1313 1314 static __be32 1315 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1316 struct nfsd4_compound_state *cstate, 1317 struct nfsd4_copy *copy, 1318 struct vfsmount **mount) 1319 { 1320 *mount = NULL; 1321 return nfserr_inval; 1322 } 1323 1324 static void 1325 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1326 struct nfsd_file *dst) 1327 { 1328 } 1329 1330 static void 1331 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1332 { 1333 } 1334 1335 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1336 struct nfs_fh *src_fh, 1337 nfs4_stateid *stateid) 1338 { 1339 return NULL; 1340 } 1341 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1342 1343 static __be32 1344 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1345 struct nfsd4_compound_state *cstate, 1346 struct nfsd4_copy *copy) 1347 { 1348 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1349 ©->nf_src, ©->cp_dst_stateid, 1350 ©->nf_dst); 1351 } 1352 1353 static void 1354 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) 1355 { 1356 nfsd_file_put(src); 1357 nfsd_file_put(dst); 1358 } 1359 1360 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1361 { 1362 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1363 1364 nfs4_put_copy(copy); 1365 } 1366 1367 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1368 struct rpc_task *task) 1369 { 1370 return 1; 1371 } 1372 1373 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1374 .release = nfsd4_cb_offload_release, 1375 .done = nfsd4_cb_offload_done 1376 }; 1377 1378 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1379 { 1380 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1381 copy->cp_synchronous = sync; 1382 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1383 } 1384 1385 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1386 { 1387 ssize_t bytes_copied = 0; 1388 size_t bytes_total = copy->cp_count; 1389 u64 src_pos = copy->cp_src_pos; 1390 u64 dst_pos = copy->cp_dst_pos; 1391 1392 do { 1393 if (kthread_should_stop()) 1394 break; 1395 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, 1396 src_pos, copy->nf_dst->nf_file, dst_pos, 1397 bytes_total); 1398 if (bytes_copied <= 0) 1399 break; 1400 bytes_total -= bytes_copied; 1401 copy->cp_res.wr_bytes_written += bytes_copied; 1402 src_pos += bytes_copied; 1403 dst_pos += bytes_copied; 1404 } while (bytes_total > 0 && !copy->cp_synchronous); 1405 return bytes_copied; 1406 } 1407 1408 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1409 { 1410 __be32 status; 1411 ssize_t bytes; 1412 1413 bytes = _nfsd_copy_file_range(copy); 1414 /* for async copy, we ignore the error, client can always retry 1415 * to get the error 1416 */ 1417 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1418 status = nfserrno(bytes); 1419 else { 1420 nfsd4_init_copy_res(copy, sync); 1421 status = nfs_ok; 1422 } 1423 1424 if (!copy->cp_intra) /* Inter server SSC */ 1425 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, 1426 copy->nf_dst); 1427 else 1428 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); 1429 1430 return status; 1431 } 1432 1433 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1434 { 1435 dst->cp_src_pos = src->cp_src_pos; 1436 dst->cp_dst_pos = src->cp_dst_pos; 1437 dst->cp_count = src->cp_count; 1438 dst->cp_synchronous = src->cp_synchronous; 1439 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1440 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1441 dst->cp_clp = src->cp_clp; 1442 dst->nf_dst = nfsd_file_get(src->nf_dst); 1443 dst->cp_intra = src->cp_intra; 1444 if (src->cp_intra) /* for inter, file_src doesn't exist yet */ 1445 dst->nf_src = nfsd_file_get(src->nf_src); 1446 1447 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1448 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); 1449 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1450 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1451 dst->ss_mnt = src->ss_mnt; 1452 } 1453 1454 static void cleanup_async_copy(struct nfsd4_copy *copy) 1455 { 1456 nfs4_free_copy_state(copy); 1457 nfsd_file_put(copy->nf_dst); 1458 if (copy->cp_intra) 1459 nfsd_file_put(copy->nf_src); 1460 spin_lock(©->cp_clp->async_lock); 1461 list_del(©->copies); 1462 spin_unlock(©->cp_clp->async_lock); 1463 nfs4_put_copy(copy); 1464 } 1465 1466 static int nfsd4_do_async_copy(void *data) 1467 { 1468 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1469 struct nfsd4_copy *cb_copy; 1470 1471 if (!copy->cp_intra) { /* Inter server SSC */ 1472 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1473 if (!copy->nf_src) { 1474 copy->nfserr = nfserr_serverfault; 1475 nfsd4_interssc_disconnect(copy->ss_mnt); 1476 goto do_callback; 1477 } 1478 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1479 ©->stateid); 1480 if (IS_ERR(copy->nf_src->nf_file)) { 1481 copy->nfserr = nfserr_offload_denied; 1482 nfsd4_interssc_disconnect(copy->ss_mnt); 1483 goto do_callback; 1484 } 1485 } 1486 1487 copy->nfserr = nfsd4_do_copy(copy, 0); 1488 do_callback: 1489 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1490 if (!cb_copy) 1491 goto out; 1492 refcount_set(&cb_copy->refcount, 1); 1493 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1494 cb_copy->cp_clp = copy->cp_clp; 1495 cb_copy->nfserr = copy->nfserr; 1496 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1497 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1498 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1499 nfsd4_run_cb(&cb_copy->cp_cb); 1500 out: 1501 if (!copy->cp_intra) 1502 kfree(copy->nf_src); 1503 cleanup_async_copy(copy); 1504 return 0; 1505 } 1506 1507 static __be32 1508 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1509 union nfsd4_op_u *u) 1510 { 1511 struct nfsd4_copy *copy = &u->copy; 1512 __be32 status; 1513 struct nfsd4_copy *async_copy = NULL; 1514 1515 if (!copy->cp_intra) { /* Inter server SSC */ 1516 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1517 status = nfserr_notsupp; 1518 goto out; 1519 } 1520 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1521 ©->ss_mnt); 1522 if (status) 1523 return nfserr_offload_denied; 1524 } else { 1525 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1526 if (status) 1527 return status; 1528 } 1529 1530 copy->cp_clp = cstate->clp; 1531 memcpy(©->fh, &cstate->current_fh.fh_handle, 1532 sizeof(struct knfsd_fh)); 1533 if (!copy->cp_synchronous) { 1534 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1535 1536 status = nfserrno(-ENOMEM); 1537 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1538 if (!async_copy) 1539 goto out_err; 1540 if (!nfs4_init_copy_state(nn, copy)) 1541 goto out_err; 1542 refcount_set(&async_copy->refcount, 1); 1543 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1544 sizeof(copy->cp_stateid)); 1545 dup_copy_fields(copy, async_copy); 1546 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1547 async_copy, "%s", "copy thread"); 1548 if (IS_ERR(async_copy->copy_task)) 1549 goto out_err; 1550 spin_lock(&async_copy->cp_clp->async_lock); 1551 list_add(&async_copy->copies, 1552 &async_copy->cp_clp->async_copies); 1553 spin_unlock(&async_copy->cp_clp->async_lock); 1554 wake_up_process(async_copy->copy_task); 1555 status = nfs_ok; 1556 } else { 1557 status = nfsd4_do_copy(copy, 1); 1558 } 1559 out: 1560 return status; 1561 out_err: 1562 if (async_copy) 1563 cleanup_async_copy(async_copy); 1564 status = nfserrno(-ENOMEM); 1565 if (!copy->cp_intra) 1566 nfsd4_interssc_disconnect(copy->ss_mnt); 1567 goto out; 1568 } 1569 1570 struct nfsd4_copy * 1571 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1572 { 1573 struct nfsd4_copy *copy; 1574 1575 spin_lock(&clp->async_lock); 1576 list_for_each_entry(copy, &clp->async_copies, copies) { 1577 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1578 continue; 1579 refcount_inc(©->refcount); 1580 spin_unlock(&clp->async_lock); 1581 return copy; 1582 } 1583 spin_unlock(&clp->async_lock); 1584 return NULL; 1585 } 1586 1587 static __be32 1588 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1589 struct nfsd4_compound_state *cstate, 1590 union nfsd4_op_u *u) 1591 { 1592 struct nfsd4_offload_status *os = &u->offload_status; 1593 struct nfsd4_copy *copy; 1594 struct nfs4_client *clp = cstate->clp; 1595 1596 copy = find_async_copy(clp, &os->stateid); 1597 if (!copy) { 1598 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1599 1600 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1601 } else 1602 nfsd4_stop_copy(copy); 1603 1604 return nfs_ok; 1605 } 1606 1607 static __be32 1608 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1609 union nfsd4_op_u *u) 1610 { 1611 struct nfsd4_copy_notify *cn = &u->copy_notify; 1612 __be32 status; 1613 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1614 struct nfs4_stid *stid; 1615 struct nfs4_cpntf_state *cps; 1616 struct nfs4_client *clp = cstate->clp; 1617 1618 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1619 &cn->cpn_src_stateid, RD_STATE, NULL, 1620 &stid); 1621 if (status) 1622 return status; 1623 1624 cn->cpn_sec = nn->nfsd4_lease; 1625 cn->cpn_nsec = 0; 1626 1627 status = nfserrno(-ENOMEM); 1628 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1629 if (!cps) 1630 goto out; 1631 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1632 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1633 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1634 1635 /* For now, only return one server address in cpn_src, the 1636 * address used by the client to connect to this server. 1637 */ 1638 cn->cpn_src.nl4_type = NL4_NETADDR; 1639 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1640 &cn->cpn_src.u.nl4_addr); 1641 WARN_ON_ONCE(status); 1642 if (status) { 1643 nfs4_put_cpntf_state(nn, cps); 1644 goto out; 1645 } 1646 out: 1647 nfs4_put_stid(stid); 1648 return status; 1649 } 1650 1651 static __be32 1652 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1653 struct nfsd4_fallocate *fallocate, int flags) 1654 { 1655 __be32 status; 1656 struct nfsd_file *nf; 1657 1658 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1659 &fallocate->falloc_stateid, 1660 WR_STATE, &nf, NULL); 1661 if (status != nfs_ok) { 1662 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1663 return status; 1664 } 1665 1666 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1667 fallocate->falloc_offset, 1668 fallocate->falloc_length, 1669 flags); 1670 nfsd_file_put(nf); 1671 return status; 1672 } 1673 static __be32 1674 nfsd4_offload_status(struct svc_rqst *rqstp, 1675 struct nfsd4_compound_state *cstate, 1676 union nfsd4_op_u *u) 1677 { 1678 struct nfsd4_offload_status *os = &u->offload_status; 1679 __be32 status = 0; 1680 struct nfsd4_copy *copy; 1681 struct nfs4_client *clp = cstate->clp; 1682 1683 copy = find_async_copy(clp, &os->stateid); 1684 if (copy) { 1685 os->count = copy->cp_res.wr_bytes_written; 1686 nfs4_put_copy(copy); 1687 } else 1688 status = nfserr_bad_stateid; 1689 1690 return status; 1691 } 1692 1693 static __be32 1694 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1695 union nfsd4_op_u *u) 1696 { 1697 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1698 } 1699 1700 static __be32 1701 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1702 union nfsd4_op_u *u) 1703 { 1704 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1705 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1706 } 1707 1708 static __be32 1709 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1710 union nfsd4_op_u *u) 1711 { 1712 struct nfsd4_seek *seek = &u->seek; 1713 int whence; 1714 __be32 status; 1715 struct nfsd_file *nf; 1716 1717 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1718 &seek->seek_stateid, 1719 RD_STATE, &nf, NULL); 1720 if (status) { 1721 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1722 return status; 1723 } 1724 1725 switch (seek->seek_whence) { 1726 case NFS4_CONTENT_DATA: 1727 whence = SEEK_DATA; 1728 break; 1729 case NFS4_CONTENT_HOLE: 1730 whence = SEEK_HOLE; 1731 break; 1732 default: 1733 status = nfserr_union_notsupp; 1734 goto out; 1735 } 1736 1737 /* 1738 * Note: This call does change file->f_pos, but nothing in NFSD 1739 * should ever file->f_pos. 1740 */ 1741 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1742 if (seek->seek_pos < 0) 1743 status = nfserrno(seek->seek_pos); 1744 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1745 seek->seek_eof = true; 1746 1747 out: 1748 nfsd_file_put(nf); 1749 return status; 1750 } 1751 1752 /* This routine never returns NFS_OK! If there are no other errors, it 1753 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1754 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1755 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1756 */ 1757 static __be32 1758 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1759 struct nfsd4_verify *verify) 1760 { 1761 __be32 *buf, *p; 1762 int count; 1763 __be32 status; 1764 1765 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1766 if (status) 1767 return status; 1768 1769 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1770 if (status) 1771 return status; 1772 1773 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1774 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1775 return nfserr_inval; 1776 if (verify->ve_attrlen & 3) 1777 return nfserr_inval; 1778 1779 /* count in words: 1780 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1781 */ 1782 count = 4 + (verify->ve_attrlen >> 2); 1783 buf = kmalloc(count << 2, GFP_KERNEL); 1784 if (!buf) 1785 return nfserr_jukebox; 1786 1787 p = buf; 1788 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1789 cstate->current_fh.fh_export, 1790 cstate->current_fh.fh_dentry, 1791 verify->ve_bmval, 1792 rqstp, 0); 1793 /* 1794 * If nfsd4_encode_fattr() ran out of space, assume that's because 1795 * the attributes are longer (hence different) than those given: 1796 */ 1797 if (status == nfserr_resource) 1798 status = nfserr_not_same; 1799 if (status) 1800 goto out_kfree; 1801 1802 /* skip bitmap */ 1803 p = buf + 1 + ntohl(buf[0]); 1804 status = nfserr_not_same; 1805 if (ntohl(*p++) != verify->ve_attrlen) 1806 goto out_kfree; 1807 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1808 status = nfserr_same; 1809 1810 out_kfree: 1811 kfree(buf); 1812 return status; 1813 } 1814 1815 static __be32 1816 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1817 union nfsd4_op_u *u) 1818 { 1819 __be32 status; 1820 1821 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1822 return status == nfserr_not_same ? nfs_ok : status; 1823 } 1824 1825 static __be32 1826 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1827 union nfsd4_op_u *u) 1828 { 1829 __be32 status; 1830 1831 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1832 return status == nfserr_same ? nfs_ok : status; 1833 } 1834 1835 #ifdef CONFIG_NFSD_PNFS 1836 static const struct nfsd4_layout_ops * 1837 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1838 { 1839 if (!exp->ex_layout_types) { 1840 dprintk("%s: export does not support pNFS\n", __func__); 1841 return NULL; 1842 } 1843 1844 if (layout_type >= LAYOUT_TYPE_MAX || 1845 !(exp->ex_layout_types & (1 << layout_type))) { 1846 dprintk("%s: layout type %d not supported\n", 1847 __func__, layout_type); 1848 return NULL; 1849 } 1850 1851 return nfsd4_layout_ops[layout_type]; 1852 } 1853 1854 static __be32 1855 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1856 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1857 { 1858 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1859 const struct nfsd4_layout_ops *ops; 1860 struct nfsd4_deviceid_map *map; 1861 struct svc_export *exp; 1862 __be32 nfserr; 1863 1864 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1865 __func__, 1866 gdp->gd_layout_type, 1867 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1868 gdp->gd_maxcount); 1869 1870 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1871 if (!map) { 1872 dprintk("%s: couldn't find device ID to export mapping!\n", 1873 __func__); 1874 return nfserr_noent; 1875 } 1876 1877 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1878 if (IS_ERR(exp)) { 1879 dprintk("%s: could not find device id\n", __func__); 1880 return nfserr_noent; 1881 } 1882 1883 nfserr = nfserr_layoutunavailable; 1884 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1885 if (!ops) 1886 goto out; 1887 1888 nfserr = nfs_ok; 1889 if (gdp->gd_maxcount != 0) { 1890 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1891 rqstp, cstate->session->se_client, gdp); 1892 } 1893 1894 gdp->gd_notify_types &= ops->notify_types; 1895 out: 1896 exp_put(exp); 1897 return nfserr; 1898 } 1899 1900 static void 1901 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1902 { 1903 kfree(u->getdeviceinfo.gd_device); 1904 } 1905 1906 static __be32 1907 nfsd4_layoutget(struct svc_rqst *rqstp, 1908 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1909 { 1910 struct nfsd4_layoutget *lgp = &u->layoutget; 1911 struct svc_fh *current_fh = &cstate->current_fh; 1912 const struct nfsd4_layout_ops *ops; 1913 struct nfs4_layout_stateid *ls; 1914 __be32 nfserr; 1915 int accmode = NFSD_MAY_READ_IF_EXEC; 1916 1917 switch (lgp->lg_seg.iomode) { 1918 case IOMODE_READ: 1919 accmode |= NFSD_MAY_READ; 1920 break; 1921 case IOMODE_RW: 1922 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1923 break; 1924 default: 1925 dprintk("%s: invalid iomode %d\n", 1926 __func__, lgp->lg_seg.iomode); 1927 nfserr = nfserr_badiomode; 1928 goto out; 1929 } 1930 1931 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1932 if (nfserr) 1933 goto out; 1934 1935 nfserr = nfserr_layoutunavailable; 1936 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1937 if (!ops) 1938 goto out; 1939 1940 /* 1941 * Verify minlength and range as per RFC5661: 1942 * o If loga_length is less than loga_minlength, 1943 * the metadata server MUST return NFS4ERR_INVAL. 1944 * o If the sum of loga_offset and loga_minlength exceeds 1945 * NFS4_UINT64_MAX, and loga_minlength is not 1946 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1947 * o If the sum of loga_offset and loga_length exceeds 1948 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1949 * the error NFS4ERR_INVAL MUST result. 1950 */ 1951 nfserr = nfserr_inval; 1952 if (lgp->lg_seg.length < lgp->lg_minlength || 1953 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1954 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1955 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1956 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1957 goto out; 1958 if (lgp->lg_seg.length == 0) 1959 goto out; 1960 1961 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1962 true, lgp->lg_layout_type, &ls); 1963 if (nfserr) { 1964 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1965 goto out; 1966 } 1967 1968 nfserr = nfserr_recallconflict; 1969 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1970 goto out_put_stid; 1971 1972 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1973 current_fh, lgp); 1974 if (nfserr) 1975 goto out_put_stid; 1976 1977 nfserr = nfsd4_insert_layout(lgp, ls); 1978 1979 out_put_stid: 1980 mutex_unlock(&ls->ls_mutex); 1981 nfs4_put_stid(&ls->ls_stid); 1982 out: 1983 return nfserr; 1984 } 1985 1986 static void 1987 nfsd4_layoutget_release(union nfsd4_op_u *u) 1988 { 1989 kfree(u->layoutget.lg_content); 1990 } 1991 1992 static __be32 1993 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1994 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1995 { 1996 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1997 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1998 struct svc_fh *current_fh = &cstate->current_fh; 1999 const struct nfsd4_layout_ops *ops; 2000 loff_t new_size = lcp->lc_last_wr + 1; 2001 struct inode *inode; 2002 struct nfs4_layout_stateid *ls; 2003 __be32 nfserr; 2004 2005 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2006 if (nfserr) 2007 goto out; 2008 2009 nfserr = nfserr_layoutunavailable; 2010 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2011 if (!ops) 2012 goto out; 2013 inode = d_inode(current_fh->fh_dentry); 2014 2015 nfserr = nfserr_inval; 2016 if (new_size <= seg->offset) { 2017 dprintk("pnfsd: last write before layout segment\n"); 2018 goto out; 2019 } 2020 if (new_size > seg->offset + seg->length) { 2021 dprintk("pnfsd: last write beyond layout segment\n"); 2022 goto out; 2023 } 2024 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2025 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2026 goto out; 2027 } 2028 2029 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2030 false, lcp->lc_layout_type, 2031 &ls); 2032 if (nfserr) { 2033 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2034 /* fixup error code as per RFC5661 */ 2035 if (nfserr == nfserr_bad_stateid) 2036 nfserr = nfserr_badlayout; 2037 goto out; 2038 } 2039 2040 /* LAYOUTCOMMIT does not require any serialization */ 2041 mutex_unlock(&ls->ls_mutex); 2042 2043 if (new_size > i_size_read(inode)) { 2044 lcp->lc_size_chg = 1; 2045 lcp->lc_newsize = new_size; 2046 } else { 2047 lcp->lc_size_chg = 0; 2048 } 2049 2050 nfserr = ops->proc_layoutcommit(inode, lcp); 2051 nfs4_put_stid(&ls->ls_stid); 2052 out: 2053 return nfserr; 2054 } 2055 2056 static __be32 2057 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2058 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2059 { 2060 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2061 struct svc_fh *current_fh = &cstate->current_fh; 2062 __be32 nfserr; 2063 2064 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2065 if (nfserr) 2066 goto out; 2067 2068 nfserr = nfserr_layoutunavailable; 2069 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2070 goto out; 2071 2072 switch (lrp->lr_seg.iomode) { 2073 case IOMODE_READ: 2074 case IOMODE_RW: 2075 case IOMODE_ANY: 2076 break; 2077 default: 2078 dprintk("%s: invalid iomode %d\n", __func__, 2079 lrp->lr_seg.iomode); 2080 nfserr = nfserr_inval; 2081 goto out; 2082 } 2083 2084 switch (lrp->lr_return_type) { 2085 case RETURN_FILE: 2086 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2087 break; 2088 case RETURN_FSID: 2089 case RETURN_ALL: 2090 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2091 break; 2092 default: 2093 dprintk("%s: invalid return_type %d\n", __func__, 2094 lrp->lr_return_type); 2095 nfserr = nfserr_inval; 2096 break; 2097 } 2098 out: 2099 return nfserr; 2100 } 2101 #endif /* CONFIG_NFSD_PNFS */ 2102 2103 static __be32 2104 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2105 union nfsd4_op_u *u) 2106 { 2107 struct nfsd4_getxattr *getxattr = &u->getxattr; 2108 2109 return nfsd_getxattr(rqstp, &cstate->current_fh, 2110 getxattr->getxa_name, &getxattr->getxa_buf, 2111 &getxattr->getxa_len); 2112 } 2113 2114 static __be32 2115 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2116 union nfsd4_op_u *u) 2117 { 2118 struct nfsd4_setxattr *setxattr = &u->setxattr; 2119 __be32 ret; 2120 2121 if (opens_in_grace(SVC_NET(rqstp))) 2122 return nfserr_grace; 2123 2124 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2125 setxattr->setxa_buf, setxattr->setxa_len, 2126 setxattr->setxa_flags); 2127 2128 if (!ret) 2129 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2130 2131 return ret; 2132 } 2133 2134 static __be32 2135 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2136 union nfsd4_op_u *u) 2137 { 2138 /* 2139 * Get the entire list, then copy out only the user attributes 2140 * in the encode function. 2141 */ 2142 return nfsd_listxattr(rqstp, &cstate->current_fh, 2143 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2144 } 2145 2146 static __be32 2147 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2148 union nfsd4_op_u *u) 2149 { 2150 struct nfsd4_removexattr *removexattr = &u->removexattr; 2151 __be32 ret; 2152 2153 if (opens_in_grace(SVC_NET(rqstp))) 2154 return nfserr_grace; 2155 2156 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2157 removexattr->rmxa_name); 2158 2159 if (!ret) 2160 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2161 2162 return ret; 2163 } 2164 2165 /* 2166 * NULL call. 2167 */ 2168 static __be32 2169 nfsd4_proc_null(struct svc_rqst *rqstp) 2170 { 2171 return rpc_success; 2172 } 2173 2174 static inline void nfsd4_increment_op_stats(u32 opnum) 2175 { 2176 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2177 nfsdstats.nfs4_opcount[opnum]++; 2178 } 2179 2180 static const struct nfsd4_operation nfsd4_ops[]; 2181 2182 static const char *nfsd4_op_name(unsigned opnum); 2183 2184 /* 2185 * Enforce NFSv4.1 COMPOUND ordering rules: 2186 * 2187 * Also note, enforced elsewhere: 2188 * - SEQUENCE other than as first op results in 2189 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2190 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2191 * (Enforced in nfsd4_bind_conn_to_session().) 2192 * - DESTROY_SESSION must be the final operation in a compound, if 2193 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2194 * (Enforced in nfsd4_destroy_session().) 2195 */ 2196 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2197 { 2198 struct nfsd4_op *first_op = &args->ops[0]; 2199 2200 /* These ordering requirements don't apply to NFSv4.0: */ 2201 if (args->minorversion == 0) 2202 return nfs_ok; 2203 /* This is weird, but OK, not our problem: */ 2204 if (args->opcnt == 0) 2205 return nfs_ok; 2206 if (first_op->status == nfserr_op_illegal) 2207 return nfs_ok; 2208 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2209 return nfserr_op_not_in_session; 2210 if (first_op->opnum == OP_SEQUENCE) 2211 return nfs_ok; 2212 /* 2213 * So first_op is something allowed outside a session, like 2214 * EXCHANGE_ID; but then it has to be the only op in the 2215 * compound: 2216 */ 2217 if (args->opcnt != 1) 2218 return nfserr_not_only_op; 2219 return nfs_ok; 2220 } 2221 2222 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2223 { 2224 return &nfsd4_ops[op->opnum]; 2225 } 2226 2227 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2228 { 2229 if (op->opnum == OP_ILLEGAL) 2230 return false; 2231 return OPDESC(op)->op_flags & OP_CACHEME; 2232 } 2233 2234 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2235 { 2236 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2237 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2238 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2239 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2240 const struct nfsd4_operation *thisd = OPDESC(this); 2241 const struct nfsd4_operation *nextd; 2242 2243 /* 2244 * Most ops check wronsec on our own; only the putfh-like ops 2245 * have special rules. 2246 */ 2247 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2248 return false; 2249 /* 2250 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2251 * put-filehandle operation if we're not going to use the 2252 * result: 2253 */ 2254 if (argp->opcnt == resp->opcnt) 2255 return false; 2256 if (next->opnum == OP_ILLEGAL) 2257 return false; 2258 nextd = OPDESC(next); 2259 /* 2260 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2261 * errors themselves as necessary; others should check for them 2262 * now: 2263 */ 2264 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2265 } 2266 2267 static void svcxdr_init_encode(struct svc_rqst *rqstp, 2268 struct nfsd4_compoundres *resp) 2269 { 2270 struct xdr_stream *xdr = &resp->xdr; 2271 struct xdr_buf *buf = &rqstp->rq_res; 2272 struct kvec *head = buf->head; 2273 2274 xdr->buf = buf; 2275 xdr->iov = head; 2276 xdr->p = head->iov_base + head->iov_len; 2277 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 2278 /* Tail and page_len should be zero at this point: */ 2279 buf->len = buf->head[0].iov_len; 2280 xdr_reset_scratch_buffer(xdr); 2281 xdr->page_ptr = buf->pages - 1; 2282 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 2283 - rqstp->rq_auth_slack; 2284 } 2285 2286 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2287 static void 2288 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2289 { 2290 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2291 struct nfsd4_copy *copy; 2292 struct nfsd4_putfh *putfh; 2293 int i; 2294 2295 /* traverse all operation and if it's a COPY compound, mark the 2296 * source filehandle to skip verification 2297 */ 2298 for (i = 0; i < args->opcnt; i++) { 2299 op = &args->ops[i]; 2300 if (op->opnum == OP_PUTFH) 2301 current_op = op; 2302 else if (op->opnum == OP_SAVEFH) 2303 saved_op = current_op; 2304 else if (op->opnum == OP_RESTOREFH) 2305 current_op = saved_op; 2306 else if (op->opnum == OP_COPY) { 2307 copy = (struct nfsd4_copy *)&op->u; 2308 if (!saved_op) { 2309 op->status = nfserr_nofilehandle; 2310 return; 2311 } 2312 putfh = (struct nfsd4_putfh *)&saved_op->u; 2313 if (!copy->cp_intra) 2314 putfh->no_verify = true; 2315 } 2316 } 2317 } 2318 #else 2319 static void 2320 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2321 { 2322 } 2323 #endif 2324 2325 /* 2326 * COMPOUND call. 2327 */ 2328 static __be32 2329 nfsd4_proc_compound(struct svc_rqst *rqstp) 2330 { 2331 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2332 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2333 struct nfsd4_op *op; 2334 struct nfsd4_compound_state *cstate = &resp->cstate; 2335 struct svc_fh *current_fh = &cstate->current_fh; 2336 struct svc_fh *save_fh = &cstate->save_fh; 2337 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2338 __be32 status; 2339 2340 svcxdr_init_encode(rqstp, resp); 2341 resp->tagp = resp->xdr.p; 2342 /* reserve space for: taglen, tag, and opcnt */ 2343 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 2344 resp->taglen = args->taglen; 2345 resp->tag = args->tag; 2346 resp->rqstp = rqstp; 2347 cstate->minorversion = args->minorversion; 2348 fh_init(current_fh, NFS4_FHSIZE); 2349 fh_init(save_fh, NFS4_FHSIZE); 2350 /* 2351 * Don't use the deferral mechanism for NFSv4; compounds make it 2352 * too hard to avoid non-idempotency problems. 2353 */ 2354 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2355 2356 /* 2357 * According to RFC3010, this takes precedence over all other errors. 2358 */ 2359 status = nfserr_minor_vers_mismatch; 2360 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2361 goto out; 2362 status = nfserr_resource; 2363 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2364 goto out; 2365 2366 status = nfs41_check_op_ordering(args); 2367 if (status) { 2368 op = &args->ops[0]; 2369 op->status = status; 2370 resp->opcnt = 1; 2371 goto encode_op; 2372 } 2373 check_if_stalefh_allowed(args); 2374 2375 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2376 2377 trace_nfsd_compound(rqstp, args->opcnt); 2378 while (!status && resp->opcnt < args->opcnt) { 2379 op = &args->ops[resp->opcnt++]; 2380 2381 /* 2382 * The XDR decode routines may have pre-set op->status; 2383 * for example, if there is a miscellaneous XDR error 2384 * it will be set to nfserr_bad_xdr. 2385 */ 2386 if (op->status) { 2387 if (op->opnum == OP_OPEN) 2388 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2389 goto encode_op; 2390 } 2391 if (!current_fh->fh_dentry && 2392 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2393 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2394 op->status = nfserr_nofilehandle; 2395 goto encode_op; 2396 } 2397 } else if (current_fh->fh_export && 2398 current_fh->fh_export->ex_fslocs.migrated && 2399 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2400 op->status = nfserr_moved; 2401 goto encode_op; 2402 } 2403 2404 fh_clear_wcc(current_fh); 2405 2406 /* If op is non-idempotent */ 2407 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2408 /* 2409 * Don't execute this op if we couldn't encode a 2410 * succesful reply: 2411 */ 2412 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2413 /* 2414 * Plus if there's another operation, make sure 2415 * we'll have space to at least encode an error: 2416 */ 2417 if (resp->opcnt < args->opcnt) 2418 plen += COMPOUND_ERR_SLACK_SPACE; 2419 op->status = nfsd4_check_resp_size(resp, plen); 2420 } 2421 2422 if (op->status) 2423 goto encode_op; 2424 2425 if (op->opdesc->op_get_currentstateid) 2426 op->opdesc->op_get_currentstateid(cstate, &op->u); 2427 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2428 2429 /* Only from SEQUENCE */ 2430 if (cstate->status == nfserr_replay_cache) { 2431 dprintk("%s NFS4.1 replay from cache\n", __func__); 2432 status = op->status; 2433 goto out; 2434 } 2435 if (!op->status) { 2436 if (op->opdesc->op_set_currentstateid) 2437 op->opdesc->op_set_currentstateid(cstate, &op->u); 2438 2439 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2440 clear_current_stateid(cstate); 2441 2442 if (current_fh->fh_export && 2443 need_wrongsec_check(rqstp)) 2444 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2445 } 2446 encode_op: 2447 if (op->status == nfserr_replay_me) { 2448 op->replay = &cstate->replay_owner->so_replay; 2449 nfsd4_encode_replay(&resp->xdr, op); 2450 status = op->status = op->replay->rp_status; 2451 } else { 2452 nfsd4_encode_operation(resp, op); 2453 status = op->status; 2454 } 2455 2456 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2457 nfsd4_op_name(op->opnum)); 2458 2459 nfsd4_cstate_clear_replay(cstate); 2460 nfsd4_increment_op_stats(op->opnum); 2461 } 2462 2463 fh_put(current_fh); 2464 fh_put(save_fh); 2465 BUG_ON(cstate->replay_owner); 2466 out: 2467 cstate->status = status; 2468 /* Reset deferral mechanism for RPC deferrals */ 2469 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2470 return rpc_success; 2471 } 2472 2473 #define op_encode_hdr_size (2) 2474 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2475 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2476 #define op_encode_change_info_maxsz (5) 2477 #define nfs4_fattr_bitmap_maxsz (4) 2478 2479 /* We'll fall back on returning no lockowner if run out of space: */ 2480 #define op_encode_lockowner_maxsz (0) 2481 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2482 2483 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2484 2485 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2486 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2487 op_encode_ace_maxsz) 2488 2489 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2490 2491 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2492 { 2493 return (op_encode_hdr_size) * sizeof(__be32); 2494 } 2495 2496 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2497 { 2498 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2499 } 2500 2501 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2502 { 2503 /* ac_supported, ac_resp_access */ 2504 return (op_encode_hdr_size + 2)* sizeof(__be32); 2505 } 2506 2507 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2508 { 2509 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2510 } 2511 2512 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2513 { 2514 return (op_encode_hdr_size + op_encode_change_info_maxsz 2515 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2516 } 2517 2518 /* 2519 * Note since this is an idempotent operation we won't insist on failing 2520 * the op prematurely if the estimate is too large. We may turn off splice 2521 * reads unnecessarily. 2522 */ 2523 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2524 struct nfsd4_op *op) 2525 { 2526 u32 *bmap = op->u.getattr.ga_bmval; 2527 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2528 u32 ret = 0; 2529 2530 if (bmap0 & FATTR4_WORD0_ACL) 2531 return svc_max_payload(rqstp); 2532 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2533 return svc_max_payload(rqstp); 2534 2535 if (bmap1 & FATTR4_WORD1_OWNER) { 2536 ret += IDMAP_NAMESZ + 4; 2537 bmap1 &= ~FATTR4_WORD1_OWNER; 2538 } 2539 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2540 ret += IDMAP_NAMESZ + 4; 2541 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2542 } 2543 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2544 ret += NFS4_FHSIZE + 4; 2545 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2546 } 2547 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2548 ret += NFS4_MAXLABELLEN + 12; 2549 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2550 } 2551 /* 2552 * Largest of remaining attributes are 16 bytes (e.g., 2553 * supported_attributes) 2554 */ 2555 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2556 /* bitmask, length */ 2557 ret += 20; 2558 return ret; 2559 } 2560 2561 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2562 { 2563 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2564 } 2565 2566 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2567 { 2568 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2569 * sizeof(__be32); 2570 } 2571 2572 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2573 { 2574 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2575 * sizeof(__be32); 2576 } 2577 2578 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2579 { 2580 return (op_encode_hdr_size + op_encode_stateid_maxsz 2581 + op_encode_change_info_maxsz + 1 2582 + nfs4_fattr_bitmap_maxsz 2583 + op_encode_delegation_maxsz) * sizeof(__be32); 2584 } 2585 2586 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2587 { 2588 u32 maxcount = 0, rlen = 0; 2589 2590 maxcount = svc_max_payload(rqstp); 2591 rlen = min(op->u.read.rd_length, maxcount); 2592 2593 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2594 } 2595 2596 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2597 { 2598 u32 maxcount = svc_max_payload(rqstp); 2599 u32 rlen = min(op->u.read.rd_length, maxcount); 2600 /* 2601 * If we detect that the file changed during hole encoding, then we 2602 * recover by encoding the remaining reply as data. This means we need 2603 * to set aside enough room to encode two data segments. 2604 */ 2605 u32 seg_len = 2 * (1 + 2 + 1); 2606 2607 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2608 } 2609 2610 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2611 { 2612 u32 maxcount = 0, rlen = 0; 2613 2614 maxcount = svc_max_payload(rqstp); 2615 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2616 2617 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2618 XDR_QUADLEN(rlen)) * sizeof(__be32); 2619 } 2620 2621 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2622 { 2623 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2624 } 2625 2626 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2627 { 2628 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2629 * sizeof(__be32); 2630 } 2631 2632 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2633 { 2634 return (op_encode_hdr_size + op_encode_change_info_maxsz 2635 + op_encode_change_info_maxsz) * sizeof(__be32); 2636 } 2637 2638 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2639 struct nfsd4_op *op) 2640 { 2641 return (op_encode_hdr_size 2642 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2643 } 2644 2645 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2646 { 2647 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2648 * sizeof(__be32); 2649 } 2650 2651 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2652 { 2653 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2654 } 2655 2656 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2657 { 2658 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2659 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2660 } 2661 2662 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2663 { 2664 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2665 sizeof(__be32); 2666 } 2667 2668 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2669 { 2670 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2671 } 2672 2673 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2674 { 2675 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2676 1 + 1 + /* eir_flags, spr_how */\ 2677 4 + /* spo_must_enforce & _allow with bitmap */\ 2678 2 + /*eir_server_owner.so_minor_id */\ 2679 /* eir_server_owner.so_major_id<> */\ 2680 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2681 /* eir_server_scope<> */\ 2682 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2683 1 + /* eir_server_impl_id array length */\ 2684 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2685 } 2686 2687 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2688 { 2689 return (op_encode_hdr_size + \ 2690 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2691 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2692 } 2693 2694 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2695 { 2696 return (op_encode_hdr_size + \ 2697 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2698 2 + /* csr_sequence, csr_flags */\ 2699 op_encode_channel_attrs_maxsz + \ 2700 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2701 } 2702 2703 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2704 { 2705 return (op_encode_hdr_size + 2706 1 /* wr_callback */ + 2707 op_encode_stateid_maxsz /* wr_callback */ + 2708 2 /* wr_count */ + 2709 1 /* wr_committed */ + 2710 op_encode_verifier_maxsz + 2711 1 /* cr_consecutive */ + 2712 1 /* cr_synchronous */) * sizeof(__be32); 2713 } 2714 2715 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2716 struct nfsd4_op *op) 2717 { 2718 return (op_encode_hdr_size + 2719 2 /* osr_count */ + 2720 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2721 } 2722 2723 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2724 struct nfsd4_op *op) 2725 { 2726 return (op_encode_hdr_size + 2727 3 /* cnr_lease_time */ + 2728 1 /* We support one cnr_source_server */ + 2729 1 /* cnr_stateid seq */ + 2730 op_encode_stateid_maxsz /* cnr_stateid */ + 2731 1 /* num cnr_source_server*/ + 2732 1 /* nl4_type */ + 2733 1 /* nl4 size */ + 2734 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2735 * sizeof(__be32); 2736 } 2737 2738 #ifdef CONFIG_NFSD_PNFS 2739 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2740 { 2741 u32 maxcount = 0, rlen = 0; 2742 2743 maxcount = svc_max_payload(rqstp); 2744 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2745 2746 return (op_encode_hdr_size + 2747 1 /* gd_layout_type*/ + 2748 XDR_QUADLEN(rlen) + 2749 2 /* gd_notify_types */) * sizeof(__be32); 2750 } 2751 2752 /* 2753 * At this stage we don't really know what layout driver will handle the request, 2754 * so we need to define an arbitrary upper bound here. 2755 */ 2756 #define MAX_LAYOUT_SIZE 128 2757 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2758 { 2759 return (op_encode_hdr_size + 2760 1 /* logr_return_on_close */ + 2761 op_encode_stateid_maxsz + 2762 1 /* nr of layouts */ + 2763 MAX_LAYOUT_SIZE) * sizeof(__be32); 2764 } 2765 2766 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2767 { 2768 return (op_encode_hdr_size + 2769 1 /* locr_newsize */ + 2770 2 /* ns_size */) * sizeof(__be32); 2771 } 2772 2773 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2774 { 2775 return (op_encode_hdr_size + 2776 1 /* lrs_stateid */ + 2777 op_encode_stateid_maxsz) * sizeof(__be32); 2778 } 2779 #endif /* CONFIG_NFSD_PNFS */ 2780 2781 2782 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2783 { 2784 return (op_encode_hdr_size + 3) * sizeof(__be32); 2785 } 2786 2787 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, 2788 struct nfsd4_op *op) 2789 { 2790 u32 maxcount, rlen; 2791 2792 maxcount = svc_max_payload(rqstp); 2793 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); 2794 2795 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2796 } 2797 2798 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp, 2799 struct nfsd4_op *op) 2800 { 2801 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2802 * sizeof(__be32); 2803 } 2804 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp, 2805 struct nfsd4_op *op) 2806 { 2807 u32 maxcount, rlen; 2808 2809 maxcount = svc_max_payload(rqstp); 2810 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); 2811 2812 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2813 } 2814 2815 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, 2816 struct nfsd4_op *op) 2817 { 2818 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2819 * sizeof(__be32); 2820 } 2821 2822 2823 static const struct nfsd4_operation nfsd4_ops[] = { 2824 [OP_ACCESS] = { 2825 .op_func = nfsd4_access, 2826 .op_name = "OP_ACCESS", 2827 .op_rsize_bop = nfsd4_access_rsize, 2828 }, 2829 [OP_CLOSE] = { 2830 .op_func = nfsd4_close, 2831 .op_flags = OP_MODIFIES_SOMETHING, 2832 .op_name = "OP_CLOSE", 2833 .op_rsize_bop = nfsd4_status_stateid_rsize, 2834 .op_get_currentstateid = nfsd4_get_closestateid, 2835 .op_set_currentstateid = nfsd4_set_closestateid, 2836 }, 2837 [OP_COMMIT] = { 2838 .op_func = nfsd4_commit, 2839 .op_flags = OP_MODIFIES_SOMETHING, 2840 .op_name = "OP_COMMIT", 2841 .op_rsize_bop = nfsd4_commit_rsize, 2842 }, 2843 [OP_CREATE] = { 2844 .op_func = nfsd4_create, 2845 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2846 .op_name = "OP_CREATE", 2847 .op_rsize_bop = nfsd4_create_rsize, 2848 }, 2849 [OP_DELEGRETURN] = { 2850 .op_func = nfsd4_delegreturn, 2851 .op_flags = OP_MODIFIES_SOMETHING, 2852 .op_name = "OP_DELEGRETURN", 2853 .op_rsize_bop = nfsd4_only_status_rsize, 2854 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2855 }, 2856 [OP_GETATTR] = { 2857 .op_func = nfsd4_getattr, 2858 .op_flags = ALLOWED_ON_ABSENT_FS, 2859 .op_rsize_bop = nfsd4_getattr_rsize, 2860 .op_name = "OP_GETATTR", 2861 }, 2862 [OP_GETFH] = { 2863 .op_func = nfsd4_getfh, 2864 .op_name = "OP_GETFH", 2865 .op_rsize_bop = nfsd4_getfh_rsize, 2866 }, 2867 [OP_LINK] = { 2868 .op_func = nfsd4_link, 2869 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2870 | OP_CACHEME, 2871 .op_name = "OP_LINK", 2872 .op_rsize_bop = nfsd4_link_rsize, 2873 }, 2874 [OP_LOCK] = { 2875 .op_func = nfsd4_lock, 2876 .op_flags = OP_MODIFIES_SOMETHING | 2877 OP_NONTRIVIAL_ERROR_ENCODE, 2878 .op_name = "OP_LOCK", 2879 .op_rsize_bop = nfsd4_lock_rsize, 2880 .op_set_currentstateid = nfsd4_set_lockstateid, 2881 }, 2882 [OP_LOCKT] = { 2883 .op_func = nfsd4_lockt, 2884 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2885 .op_name = "OP_LOCKT", 2886 .op_rsize_bop = nfsd4_lock_rsize, 2887 }, 2888 [OP_LOCKU] = { 2889 .op_func = nfsd4_locku, 2890 .op_flags = OP_MODIFIES_SOMETHING, 2891 .op_name = "OP_LOCKU", 2892 .op_rsize_bop = nfsd4_status_stateid_rsize, 2893 .op_get_currentstateid = nfsd4_get_lockustateid, 2894 }, 2895 [OP_LOOKUP] = { 2896 .op_func = nfsd4_lookup, 2897 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2898 .op_name = "OP_LOOKUP", 2899 .op_rsize_bop = nfsd4_only_status_rsize, 2900 }, 2901 [OP_LOOKUPP] = { 2902 .op_func = nfsd4_lookupp, 2903 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2904 .op_name = "OP_LOOKUPP", 2905 .op_rsize_bop = nfsd4_only_status_rsize, 2906 }, 2907 [OP_NVERIFY] = { 2908 .op_func = nfsd4_nverify, 2909 .op_name = "OP_NVERIFY", 2910 .op_rsize_bop = nfsd4_only_status_rsize, 2911 }, 2912 [OP_OPEN] = { 2913 .op_func = nfsd4_open, 2914 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2915 .op_name = "OP_OPEN", 2916 .op_rsize_bop = nfsd4_open_rsize, 2917 .op_set_currentstateid = nfsd4_set_openstateid, 2918 }, 2919 [OP_OPEN_CONFIRM] = { 2920 .op_func = nfsd4_open_confirm, 2921 .op_flags = OP_MODIFIES_SOMETHING, 2922 .op_name = "OP_OPEN_CONFIRM", 2923 .op_rsize_bop = nfsd4_status_stateid_rsize, 2924 }, 2925 [OP_OPEN_DOWNGRADE] = { 2926 .op_func = nfsd4_open_downgrade, 2927 .op_flags = OP_MODIFIES_SOMETHING, 2928 .op_name = "OP_OPEN_DOWNGRADE", 2929 .op_rsize_bop = nfsd4_status_stateid_rsize, 2930 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2931 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2932 }, 2933 [OP_PUTFH] = { 2934 .op_func = nfsd4_putfh, 2935 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2936 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2937 .op_name = "OP_PUTFH", 2938 .op_rsize_bop = nfsd4_only_status_rsize, 2939 }, 2940 [OP_PUTPUBFH] = { 2941 .op_func = nfsd4_putrootfh, 2942 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2943 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2944 .op_name = "OP_PUTPUBFH", 2945 .op_rsize_bop = nfsd4_only_status_rsize, 2946 }, 2947 [OP_PUTROOTFH] = { 2948 .op_func = nfsd4_putrootfh, 2949 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2950 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2951 .op_name = "OP_PUTROOTFH", 2952 .op_rsize_bop = nfsd4_only_status_rsize, 2953 }, 2954 [OP_READ] = { 2955 .op_func = nfsd4_read, 2956 .op_release = nfsd4_read_release, 2957 .op_name = "OP_READ", 2958 .op_rsize_bop = nfsd4_read_rsize, 2959 .op_get_currentstateid = nfsd4_get_readstateid, 2960 }, 2961 [OP_READDIR] = { 2962 .op_func = nfsd4_readdir, 2963 .op_name = "OP_READDIR", 2964 .op_rsize_bop = nfsd4_readdir_rsize, 2965 }, 2966 [OP_READLINK] = { 2967 .op_func = nfsd4_readlink, 2968 .op_name = "OP_READLINK", 2969 .op_rsize_bop = nfsd4_readlink_rsize, 2970 }, 2971 [OP_REMOVE] = { 2972 .op_func = nfsd4_remove, 2973 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2974 .op_name = "OP_REMOVE", 2975 .op_rsize_bop = nfsd4_remove_rsize, 2976 }, 2977 [OP_RENAME] = { 2978 .op_func = nfsd4_rename, 2979 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2980 .op_name = "OP_RENAME", 2981 .op_rsize_bop = nfsd4_rename_rsize, 2982 }, 2983 [OP_RENEW] = { 2984 .op_func = nfsd4_renew, 2985 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2986 | OP_MODIFIES_SOMETHING, 2987 .op_name = "OP_RENEW", 2988 .op_rsize_bop = nfsd4_only_status_rsize, 2989 2990 }, 2991 [OP_RESTOREFH] = { 2992 .op_func = nfsd4_restorefh, 2993 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2994 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2995 .op_name = "OP_RESTOREFH", 2996 .op_rsize_bop = nfsd4_only_status_rsize, 2997 }, 2998 [OP_SAVEFH] = { 2999 .op_func = nfsd4_savefh, 3000 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 3001 .op_name = "OP_SAVEFH", 3002 .op_rsize_bop = nfsd4_only_status_rsize, 3003 }, 3004 [OP_SECINFO] = { 3005 .op_func = nfsd4_secinfo, 3006 .op_release = nfsd4_secinfo_release, 3007 .op_flags = OP_HANDLES_WRONGSEC, 3008 .op_name = "OP_SECINFO", 3009 .op_rsize_bop = nfsd4_secinfo_rsize, 3010 }, 3011 [OP_SETATTR] = { 3012 .op_func = nfsd4_setattr, 3013 .op_name = "OP_SETATTR", 3014 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3015 | OP_NONTRIVIAL_ERROR_ENCODE, 3016 .op_rsize_bop = nfsd4_setattr_rsize, 3017 .op_get_currentstateid = nfsd4_get_setattrstateid, 3018 }, 3019 [OP_SETCLIENTID] = { 3020 .op_func = nfsd4_setclientid, 3021 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3022 | OP_MODIFIES_SOMETHING | OP_CACHEME 3023 | OP_NONTRIVIAL_ERROR_ENCODE, 3024 .op_name = "OP_SETCLIENTID", 3025 .op_rsize_bop = nfsd4_setclientid_rsize, 3026 }, 3027 [OP_SETCLIENTID_CONFIRM] = { 3028 .op_func = nfsd4_setclientid_confirm, 3029 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3030 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3031 .op_name = "OP_SETCLIENTID_CONFIRM", 3032 .op_rsize_bop = nfsd4_only_status_rsize, 3033 }, 3034 [OP_VERIFY] = { 3035 .op_func = nfsd4_verify, 3036 .op_name = "OP_VERIFY", 3037 .op_rsize_bop = nfsd4_only_status_rsize, 3038 }, 3039 [OP_WRITE] = { 3040 .op_func = nfsd4_write, 3041 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3042 .op_name = "OP_WRITE", 3043 .op_rsize_bop = nfsd4_write_rsize, 3044 .op_get_currentstateid = nfsd4_get_writestateid, 3045 }, 3046 [OP_RELEASE_LOCKOWNER] = { 3047 .op_func = nfsd4_release_lockowner, 3048 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3049 | OP_MODIFIES_SOMETHING, 3050 .op_name = "OP_RELEASE_LOCKOWNER", 3051 .op_rsize_bop = nfsd4_only_status_rsize, 3052 }, 3053 3054 /* NFSv4.1 operations */ 3055 [OP_EXCHANGE_ID] = { 3056 .op_func = nfsd4_exchange_id, 3057 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3058 | OP_MODIFIES_SOMETHING, 3059 .op_name = "OP_EXCHANGE_ID", 3060 .op_rsize_bop = nfsd4_exchange_id_rsize, 3061 }, 3062 [OP_BACKCHANNEL_CTL] = { 3063 .op_func = nfsd4_backchannel_ctl, 3064 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3065 .op_name = "OP_BACKCHANNEL_CTL", 3066 .op_rsize_bop = nfsd4_only_status_rsize, 3067 }, 3068 [OP_BIND_CONN_TO_SESSION] = { 3069 .op_func = nfsd4_bind_conn_to_session, 3070 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3071 | OP_MODIFIES_SOMETHING, 3072 .op_name = "OP_BIND_CONN_TO_SESSION", 3073 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3074 }, 3075 [OP_CREATE_SESSION] = { 3076 .op_func = nfsd4_create_session, 3077 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3078 | OP_MODIFIES_SOMETHING, 3079 .op_name = "OP_CREATE_SESSION", 3080 .op_rsize_bop = nfsd4_create_session_rsize, 3081 }, 3082 [OP_DESTROY_SESSION] = { 3083 .op_func = nfsd4_destroy_session, 3084 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3085 | OP_MODIFIES_SOMETHING, 3086 .op_name = "OP_DESTROY_SESSION", 3087 .op_rsize_bop = nfsd4_only_status_rsize, 3088 }, 3089 [OP_SEQUENCE] = { 3090 .op_func = nfsd4_sequence, 3091 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3092 .op_name = "OP_SEQUENCE", 3093 .op_rsize_bop = nfsd4_sequence_rsize, 3094 }, 3095 [OP_DESTROY_CLIENTID] = { 3096 .op_func = nfsd4_destroy_clientid, 3097 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3098 | OP_MODIFIES_SOMETHING, 3099 .op_name = "OP_DESTROY_CLIENTID", 3100 .op_rsize_bop = nfsd4_only_status_rsize, 3101 }, 3102 [OP_RECLAIM_COMPLETE] = { 3103 .op_func = nfsd4_reclaim_complete, 3104 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3105 .op_name = "OP_RECLAIM_COMPLETE", 3106 .op_rsize_bop = nfsd4_only_status_rsize, 3107 }, 3108 [OP_SECINFO_NO_NAME] = { 3109 .op_func = nfsd4_secinfo_no_name, 3110 .op_release = nfsd4_secinfo_no_name_release, 3111 .op_flags = OP_HANDLES_WRONGSEC, 3112 .op_name = "OP_SECINFO_NO_NAME", 3113 .op_rsize_bop = nfsd4_secinfo_rsize, 3114 }, 3115 [OP_TEST_STATEID] = { 3116 .op_func = nfsd4_test_stateid, 3117 .op_flags = ALLOWED_WITHOUT_FH, 3118 .op_name = "OP_TEST_STATEID", 3119 .op_rsize_bop = nfsd4_test_stateid_rsize, 3120 }, 3121 [OP_FREE_STATEID] = { 3122 .op_func = nfsd4_free_stateid, 3123 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3124 .op_name = "OP_FREE_STATEID", 3125 .op_get_currentstateid = nfsd4_get_freestateid, 3126 .op_rsize_bop = nfsd4_only_status_rsize, 3127 }, 3128 #ifdef CONFIG_NFSD_PNFS 3129 [OP_GETDEVICEINFO] = { 3130 .op_func = nfsd4_getdeviceinfo, 3131 .op_release = nfsd4_getdeviceinfo_release, 3132 .op_flags = ALLOWED_WITHOUT_FH, 3133 .op_name = "OP_GETDEVICEINFO", 3134 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3135 }, 3136 [OP_LAYOUTGET] = { 3137 .op_func = nfsd4_layoutget, 3138 .op_release = nfsd4_layoutget_release, 3139 .op_flags = OP_MODIFIES_SOMETHING, 3140 .op_name = "OP_LAYOUTGET", 3141 .op_rsize_bop = nfsd4_layoutget_rsize, 3142 }, 3143 [OP_LAYOUTCOMMIT] = { 3144 .op_func = nfsd4_layoutcommit, 3145 .op_flags = OP_MODIFIES_SOMETHING, 3146 .op_name = "OP_LAYOUTCOMMIT", 3147 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3148 }, 3149 [OP_LAYOUTRETURN] = { 3150 .op_func = nfsd4_layoutreturn, 3151 .op_flags = OP_MODIFIES_SOMETHING, 3152 .op_name = "OP_LAYOUTRETURN", 3153 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3154 }, 3155 #endif /* CONFIG_NFSD_PNFS */ 3156 3157 /* NFSv4.2 operations */ 3158 [OP_ALLOCATE] = { 3159 .op_func = nfsd4_allocate, 3160 .op_flags = OP_MODIFIES_SOMETHING, 3161 .op_name = "OP_ALLOCATE", 3162 .op_rsize_bop = nfsd4_only_status_rsize, 3163 }, 3164 [OP_DEALLOCATE] = { 3165 .op_func = nfsd4_deallocate, 3166 .op_flags = OP_MODIFIES_SOMETHING, 3167 .op_name = "OP_DEALLOCATE", 3168 .op_rsize_bop = nfsd4_only_status_rsize, 3169 }, 3170 [OP_CLONE] = { 3171 .op_func = nfsd4_clone, 3172 .op_flags = OP_MODIFIES_SOMETHING, 3173 .op_name = "OP_CLONE", 3174 .op_rsize_bop = nfsd4_only_status_rsize, 3175 }, 3176 [OP_COPY] = { 3177 .op_func = nfsd4_copy, 3178 .op_flags = OP_MODIFIES_SOMETHING, 3179 .op_name = "OP_COPY", 3180 .op_rsize_bop = nfsd4_copy_rsize, 3181 }, 3182 [OP_READ_PLUS] = { 3183 .op_func = nfsd4_read, 3184 .op_release = nfsd4_read_release, 3185 .op_name = "OP_READ_PLUS", 3186 .op_rsize_bop = nfsd4_read_plus_rsize, 3187 .op_get_currentstateid = nfsd4_get_readstateid, 3188 }, 3189 [OP_SEEK] = { 3190 .op_func = nfsd4_seek, 3191 .op_name = "OP_SEEK", 3192 .op_rsize_bop = nfsd4_seek_rsize, 3193 }, 3194 [OP_OFFLOAD_STATUS] = { 3195 .op_func = nfsd4_offload_status, 3196 .op_name = "OP_OFFLOAD_STATUS", 3197 .op_rsize_bop = nfsd4_offload_status_rsize, 3198 }, 3199 [OP_OFFLOAD_CANCEL] = { 3200 .op_func = nfsd4_offload_cancel, 3201 .op_flags = OP_MODIFIES_SOMETHING, 3202 .op_name = "OP_OFFLOAD_CANCEL", 3203 .op_rsize_bop = nfsd4_only_status_rsize, 3204 }, 3205 [OP_COPY_NOTIFY] = { 3206 .op_func = nfsd4_copy_notify, 3207 .op_flags = OP_MODIFIES_SOMETHING, 3208 .op_name = "OP_COPY_NOTIFY", 3209 .op_rsize_bop = nfsd4_copy_notify_rsize, 3210 }, 3211 [OP_GETXATTR] = { 3212 .op_func = nfsd4_getxattr, 3213 .op_name = "OP_GETXATTR", 3214 .op_rsize_bop = nfsd4_getxattr_rsize, 3215 }, 3216 [OP_SETXATTR] = { 3217 .op_func = nfsd4_setxattr, 3218 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3219 .op_name = "OP_SETXATTR", 3220 .op_rsize_bop = nfsd4_setxattr_rsize, 3221 }, 3222 [OP_LISTXATTRS] = { 3223 .op_func = nfsd4_listxattrs, 3224 .op_name = "OP_LISTXATTRS", 3225 .op_rsize_bop = nfsd4_listxattrs_rsize, 3226 }, 3227 [OP_REMOVEXATTR] = { 3228 .op_func = nfsd4_removexattr, 3229 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3230 .op_name = "OP_REMOVEXATTR", 3231 .op_rsize_bop = nfsd4_removexattr_rsize, 3232 }, 3233 }; 3234 3235 /** 3236 * nfsd4_spo_must_allow - Determine if the compound op contains an 3237 * operation that is allowed to be sent with machine credentials 3238 * 3239 * @rqstp: a pointer to the struct svc_rqst 3240 * 3241 * Checks to see if the compound contains a spo_must_allow op 3242 * and confirms that it was sent with the proper machine creds. 3243 */ 3244 3245 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3246 { 3247 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3248 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3249 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3250 struct nfsd4_compound_state *cstate = &resp->cstate; 3251 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3252 u32 opiter; 3253 3254 if (!cstate->minorversion) 3255 return false; 3256 3257 if (cstate->spo_must_allowed) 3258 return true; 3259 3260 opiter = resp->opcnt; 3261 while (opiter < argp->opcnt) { 3262 this = &argp->ops[opiter++]; 3263 if (test_bit(this->opnum, allow->u.longs) && 3264 cstate->clp->cl_mach_cred && 3265 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3266 cstate->spo_must_allowed = true; 3267 return true; 3268 } 3269 } 3270 cstate->spo_must_allowed = false; 3271 return false; 3272 } 3273 3274 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3275 { 3276 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3277 return op_encode_hdr_size * sizeof(__be32); 3278 3279 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3280 return OPDESC(op)->op_rsize_bop(rqstp, op); 3281 } 3282 3283 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3284 { 3285 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3286 pr_err("unable to encode reply to nonidempotent op %u (%s)\n", 3287 op->opnum, nfsd4_op_name(op->opnum)); 3288 WARN_ON_ONCE(1); 3289 } 3290 } 3291 3292 static const char *nfsd4_op_name(unsigned opnum) 3293 { 3294 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3295 return nfsd4_ops[opnum].op_name; 3296 return "unknown_operation"; 3297 } 3298 3299 static const struct svc_procedure nfsd_procedures4[2] = { 3300 [NFSPROC4_NULL] = { 3301 .pc_func = nfsd4_proc_null, 3302 .pc_decode = nfssvc_decode_voidarg, 3303 .pc_encode = nfssvc_encode_voidres, 3304 .pc_argsize = sizeof(struct nfsd_voidargs), 3305 .pc_ressize = sizeof(struct nfsd_voidres), 3306 .pc_cachetype = RC_NOCACHE, 3307 .pc_xdrressize = 1, 3308 }, 3309 [NFSPROC4_COMPOUND] = { 3310 .pc_func = nfsd4_proc_compound, 3311 .pc_decode = nfs4svc_decode_compoundargs, 3312 .pc_encode = nfs4svc_encode_compoundres, 3313 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3314 .pc_ressize = sizeof(struct nfsd4_compoundres), 3315 .pc_release = nfsd4_release_compoundargs, 3316 .pc_cachetype = RC_NOCACHE, 3317 .pc_xdrressize = NFSD_BUFSIZE/4, 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