1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/fs_struct.h> 36 #include <linux/file.h> 37 #include <linux/falloc.h> 38 #include <linux/slab.h> 39 #include <linux/kthread.h> 40 #include <linux/sunrpc/addr.h> 41 #include <linux/nfs_ssc.h> 42 43 #include "idmap.h" 44 #include "cache.h" 45 #include "xdr4.h" 46 #include "vfs.h" 47 #include "current_stateid.h" 48 #include "netns.h" 49 #include "acl.h" 50 #include "pnfs.h" 51 #include "trace.h" 52 53 static bool inter_copy_offload_enable; 54 module_param(inter_copy_offload_enable, bool, 0644); 55 MODULE_PARM_DESC(inter_copy_offload_enable, 56 "Enable inter server to server copy offload. Default: false"); 57 58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 59 #include <linux/security.h> 60 61 static inline void 62 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 63 { 64 struct inode *inode = d_inode(resfh->fh_dentry); 65 int status; 66 67 inode_lock(inode); 68 status = security_inode_setsecctx(resfh->fh_dentry, 69 label->data, label->len); 70 inode_unlock(inode); 71 72 if (status) 73 /* 74 * XXX: We should really fail the whole open, but we may 75 * already have created a new file, so it may be too 76 * late. For now this seems the least of evils: 77 */ 78 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 79 80 return; 81 } 82 #else 83 static inline void 84 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 85 { } 86 #endif 87 88 #define NFSDDBG_FACILITY NFSDDBG_PROC 89 90 static u32 nfsd_attrmask[] = { 91 NFSD_WRITEABLE_ATTRS_WORD0, 92 NFSD_WRITEABLE_ATTRS_WORD1, 93 NFSD_WRITEABLE_ATTRS_WORD2 94 }; 95 96 static u32 nfsd41_ex_attrmask[] = { 97 NFSD_SUPPATTR_EXCLCREAT_WORD0, 98 NFSD_SUPPATTR_EXCLCREAT_WORD1, 99 NFSD_SUPPATTR_EXCLCREAT_WORD2 100 }; 101 102 static __be32 103 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 104 u32 *bmval, u32 *writable) 105 { 106 struct dentry *dentry = cstate->current_fh.fh_dentry; 107 struct svc_export *exp = cstate->current_fh.fh_export; 108 109 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 110 return nfserr_attrnotsupp; 111 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 112 return nfserr_attrnotsupp; 113 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 114 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 115 return nfserr_attrnotsupp; 116 if (writable && !bmval_is_subset(bmval, writable)) 117 return nfserr_inval; 118 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 119 (bmval[1] & FATTR4_WORD1_MODE)) 120 return nfserr_inval; 121 return nfs_ok; 122 } 123 124 static __be32 125 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 126 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 127 { 128 __be32 status = nfs_ok; 129 130 if (open->op_create == NFS4_OPEN_CREATE) { 131 if (open->op_createmode == NFS4_CREATE_UNCHECKED 132 || open->op_createmode == NFS4_CREATE_GUARDED) 133 status = check_attr_support(rqstp, cstate, 134 open->op_bmval, nfsd_attrmask); 135 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 136 status = check_attr_support(rqstp, cstate, 137 open->op_bmval, nfsd41_ex_attrmask); 138 } 139 140 return status; 141 } 142 143 static int 144 is_create_with_attrs(struct nfsd4_open *open) 145 { 146 return open->op_create == NFS4_OPEN_CREATE 147 && (open->op_createmode == NFS4_CREATE_UNCHECKED 148 || open->op_createmode == NFS4_CREATE_GUARDED 149 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 150 } 151 152 /* 153 * if error occurs when setting the acl, just clear the acl bit 154 * in the returned attr bitmap. 155 */ 156 static void 157 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 158 struct nfs4_acl *acl, u32 *bmval) 159 { 160 __be32 status; 161 162 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 163 if (status) 164 /* 165 * We should probably fail the whole open at this point, 166 * but we've already created the file, so it's too late; 167 * So this seems the least of evils: 168 */ 169 bmval[0] &= ~FATTR4_WORD0_ACL; 170 } 171 172 static inline void 173 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 174 { 175 fh_put(dst); 176 dget(src->fh_dentry); 177 if (src->fh_export) 178 exp_get(src->fh_export); 179 *dst = *src; 180 } 181 182 static __be32 183 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 184 { 185 __be32 status; 186 187 if (open->op_truncate && 188 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 189 return nfserr_inval; 190 191 accmode |= NFSD_MAY_READ_IF_EXEC; 192 193 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 194 accmode |= NFSD_MAY_READ; 195 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 196 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 197 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 198 accmode |= NFSD_MAY_WRITE; 199 200 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 201 202 return status; 203 } 204 205 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 206 { 207 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 208 209 if (S_ISREG(mode)) 210 return nfs_ok; 211 if (S_ISDIR(mode)) 212 return nfserr_isdir; 213 /* 214 * Using err_symlink as our catch-all case may look odd; but 215 * there's no other obvious error for this case in 4.0, and we 216 * happen to know that it will cause the linux v4 client to do 217 * the right thing on attempts to open something other than a 218 * regular file. 219 */ 220 return nfserr_symlink; 221 } 222 223 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 224 { 225 if (nfsd4_has_session(cstate)) 226 return; 227 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 228 &resfh->fh_handle); 229 } 230 231 static __be32 232 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 233 { 234 struct svc_fh *current_fh = &cstate->current_fh; 235 int accmode; 236 __be32 status; 237 238 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 239 if (!*resfh) 240 return nfserr_jukebox; 241 fh_init(*resfh, NFS4_FHSIZE); 242 open->op_truncate = false; 243 244 if (open->op_create) { 245 /* FIXME: check session persistence and pnfs flags. 246 * The nfsv4.1 spec requires the following semantics: 247 * 248 * Persistent | pNFS | Server REQUIRED | Client Allowed 249 * Reply Cache | server | | 250 * -------------+--------+-----------------+-------------------- 251 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 252 * | | | (SHOULD) 253 * | | and EXCLUSIVE4 | or EXCLUSIVE4 254 * | | | (SHOULD NOT) 255 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 256 * yes | no | GUARDED4 | GUARDED4 257 * yes | yes | GUARDED4 | GUARDED4 258 */ 259 260 /* 261 * Note: create modes (UNCHECKED,GUARDED...) are the same 262 * in NFSv4 as in v3 except EXCLUSIVE4_1. 263 */ 264 current->fs->umask = open->op_umask; 265 status = do_nfsd_create(rqstp, current_fh, open->op_fname, 266 open->op_fnamelen, &open->op_iattr, 267 *resfh, open->op_createmode, 268 (u32 *)open->op_verf.data, 269 &open->op_truncate, &open->op_created); 270 current->fs->umask = 0; 271 272 if (!status && open->op_label.len) 273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 274 275 /* 276 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 277 * use the returned bitmask to indicate which attributes 278 * we used to store the verifier: 279 */ 280 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 281 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 282 FATTR4_WORD1_TIME_MODIFY); 283 } else 284 /* 285 * Note this may exit with the parent still locked. 286 * We will hold the lock until nfsd4_open's final 287 * lookup, to prevent renames or unlinks until we've had 288 * a chance to an acquire a delegation if appropriate. 289 */ 290 status = nfsd_lookup(rqstp, current_fh, 291 open->op_fname, open->op_fnamelen, *resfh); 292 if (status) 293 goto out; 294 status = nfsd_check_obj_isreg(*resfh); 295 if (status) 296 goto out; 297 298 if (is_create_with_attrs(open) && open->op_acl != NULL) 299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 300 301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 302 accmode = NFSD_MAY_NOP; 303 if (open->op_created || 304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 305 accmode |= NFSD_MAY_OWNER_OVERRIDE; 306 status = do_open_permission(rqstp, *resfh, open, accmode); 307 set_change_info(&open->op_cinfo, current_fh); 308 out: 309 return status; 310 } 311 312 static __be32 313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 314 { 315 struct svc_fh *current_fh = &cstate->current_fh; 316 __be32 status; 317 int accmode = 0; 318 319 /* We don't know the target directory, and therefore can not 320 * set the change info 321 */ 322 323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 324 325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 326 327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 328 (open->op_iattr.ia_size == 0); 329 /* 330 * In the delegation case, the client is telling us about an 331 * open that it *already* performed locally, some time ago. We 332 * should let it succeed now if possible. 333 * 334 * In the case of a CLAIM_FH open, on the other hand, the client 335 * may be counting on us to enforce permissions (the Linux 4.1 336 * client uses this for normal opens, for example). 337 */ 338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 339 accmode = NFSD_MAY_OWNER_OVERRIDE; 340 341 status = do_open_permission(rqstp, current_fh, open, accmode); 342 343 return status; 344 } 345 346 static void 347 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 348 { 349 struct nfsd4_sessionid *sid = 350 (struct nfsd4_sessionid *)session->se_sessionid.data; 351 352 clid->cl_boot = sid->clientid.cl_boot; 353 clid->cl_id = sid->clientid.cl_id; 354 } 355 356 static __be32 357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 358 union nfsd4_op_u *u) 359 { 360 struct nfsd4_open *open = &u->open; 361 __be32 status; 362 struct svc_fh *resfh = NULL; 363 struct net *net = SVC_NET(rqstp); 364 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 365 bool reclaim = false; 366 367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 368 (int)open->op_fnamelen, open->op_fname, 369 open->op_openowner); 370 371 /* This check required by spec. */ 372 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 373 return nfserr_inval; 374 375 open->op_created = false; 376 /* 377 * RFC5661 18.51.3 378 * Before RECLAIM_COMPLETE done, server should deny new lock 379 */ 380 if (nfsd4_has_session(cstate) && 381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) && 382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 383 return nfserr_grace; 384 385 if (nfsd4_has_session(cstate)) 386 copy_clientid(&open->op_clientid, cstate->session); 387 388 /* check seqid for replay. set nfs4_owner */ 389 status = nfsd4_process_open1(cstate, open, nn); 390 if (status == nfserr_replay_me) { 391 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 392 fh_put(&cstate->current_fh); 393 fh_copy_shallow(&cstate->current_fh.fh_handle, 394 &rp->rp_openfh); 395 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 396 if (status) 397 dprintk("nfsd4_open: replay failed" 398 " restoring previous filehandle\n"); 399 else 400 status = nfserr_replay_me; 401 } 402 if (status) 403 goto out; 404 if (open->op_xdr_error) { 405 status = open->op_xdr_error; 406 goto out; 407 } 408 409 status = nfsd4_check_open_attributes(rqstp, cstate, open); 410 if (status) 411 goto out; 412 413 /* Openowner is now set, so sequence id will get bumped. Now we need 414 * these checks before we do any creates: */ 415 status = nfserr_grace; 416 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 417 goto out; 418 status = nfserr_no_grace; 419 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 420 goto out; 421 422 switch (open->op_claim_type) { 423 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 424 case NFS4_OPEN_CLAIM_NULL: 425 status = do_open_lookup(rqstp, cstate, open, &resfh); 426 if (status) 427 goto out; 428 break; 429 case NFS4_OPEN_CLAIM_PREVIOUS: 430 status = nfs4_check_open_reclaim(cstate->clp); 431 if (status) 432 goto out; 433 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 434 reclaim = true; 435 fallthrough; 436 case NFS4_OPEN_CLAIM_FH: 437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 438 status = do_open_fhandle(rqstp, cstate, open); 439 if (status) 440 goto out; 441 resfh = &cstate->current_fh; 442 break; 443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 444 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 445 dprintk("NFSD: unsupported OPEN claim type %d\n", 446 open->op_claim_type); 447 status = nfserr_notsupp; 448 goto out; 449 default: 450 dprintk("NFSD: Invalid OPEN claim type %d\n", 451 open->op_claim_type); 452 status = nfserr_inval; 453 goto out; 454 } 455 /* 456 * nfsd4_process_open2() does the actual opening of the file. If 457 * successful, it (1) truncates the file if open->op_truncate was 458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 459 */ 460 status = nfsd4_process_open2(rqstp, resfh, open); 461 WARN(status && open->op_created, 462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 463 be32_to_cpu(status)); 464 if (reclaim && !status) 465 nn->somebody_reclaimed = true; 466 out: 467 if (resfh && resfh != &cstate->current_fh) { 468 fh_dup2(&cstate->current_fh, resfh); 469 fh_put(resfh); 470 kfree(resfh); 471 } 472 nfsd4_cleanup_open_state(cstate, open); 473 nfsd4_bump_seqid(cstate, status); 474 return status; 475 } 476 477 /* 478 * OPEN is the only seqid-mutating operation whose decoding can fail 479 * with a seqid-mutating error (specifically, decoding of user names in 480 * the attributes). Therefore we have to do some processing to look up 481 * the stateowner so that we can bump the seqid. 482 */ 483 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 484 { 485 struct nfsd4_open *open = &op->u.open; 486 487 if (!seqid_mutating_err(ntohl(op->status))) 488 return op->status; 489 if (nfsd4_has_session(cstate)) 490 return op->status; 491 open->op_xdr_error = op->status; 492 return nfsd4_open(rqstp, cstate, &op->u); 493 } 494 495 /* 496 * filehandle-manipulating ops. 497 */ 498 static __be32 499 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 500 union nfsd4_op_u *u) 501 { 502 u->getfh = &cstate->current_fh; 503 return nfs_ok; 504 } 505 506 static __be32 507 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 508 union nfsd4_op_u *u) 509 { 510 struct nfsd4_putfh *putfh = &u->putfh; 511 __be32 ret; 512 513 fh_put(&cstate->current_fh); 514 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 515 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 516 putfh->pf_fhlen); 517 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 518 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 519 if (ret == nfserr_stale && putfh->no_verify) { 520 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 521 ret = 0; 522 } 523 #endif 524 return ret; 525 } 526 527 static __be32 528 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 529 union nfsd4_op_u *u) 530 { 531 __be32 status; 532 533 fh_put(&cstate->current_fh); 534 status = exp_pseudoroot(rqstp, &cstate->current_fh); 535 return status; 536 } 537 538 static __be32 539 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 540 union nfsd4_op_u *u) 541 { 542 if (!cstate->save_fh.fh_dentry) 543 return nfserr_restorefh; 544 545 fh_dup2(&cstate->current_fh, &cstate->save_fh); 546 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 547 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 548 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 549 } 550 return nfs_ok; 551 } 552 553 static __be32 554 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 555 union nfsd4_op_u *u) 556 { 557 fh_dup2(&cstate->save_fh, &cstate->current_fh); 558 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 559 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 560 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 561 } 562 return nfs_ok; 563 } 564 565 /* 566 * misc nfsv4 ops 567 */ 568 static __be32 569 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 570 union nfsd4_op_u *u) 571 { 572 struct nfsd4_access *access = &u->access; 573 u32 access_full; 574 575 access_full = NFS3_ACCESS_FULL; 576 if (cstate->minorversion >= 2) 577 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | 578 NFS4_ACCESS_XAWRITE; 579 580 if (access->ac_req_access & ~access_full) 581 return nfserr_inval; 582 583 access->ac_resp_access = access->ac_req_access; 584 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 585 &access->ac_supported); 586 } 587 588 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 589 { 590 __be32 *verf = (__be32 *)verifier->data; 591 592 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 593 594 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); 595 } 596 597 static __be32 598 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 599 union nfsd4_op_u *u) 600 { 601 struct nfsd4_commit *commit = &u->commit; 602 603 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 604 commit->co_count, 605 (__be32 *)commit->co_verf.data); 606 } 607 608 static __be32 609 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 610 union nfsd4_op_u *u) 611 { 612 struct nfsd4_create *create = &u->create; 613 struct svc_fh resfh; 614 __be32 status; 615 dev_t rdev; 616 617 fh_init(&resfh, NFS4_FHSIZE); 618 619 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 620 if (status) 621 return status; 622 623 status = check_attr_support(rqstp, cstate, create->cr_bmval, 624 nfsd_attrmask); 625 if (status) 626 return status; 627 628 current->fs->umask = create->cr_umask; 629 switch (create->cr_type) { 630 case NF4LNK: 631 status = nfsd_symlink(rqstp, &cstate->current_fh, 632 create->cr_name, create->cr_namelen, 633 create->cr_data, &resfh); 634 break; 635 636 case NF4BLK: 637 status = nfserr_inval; 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 639 if (MAJOR(rdev) != create->cr_specdata1 || 640 MINOR(rdev) != create->cr_specdata2) 641 goto out_umask; 642 status = nfsd_create(rqstp, &cstate->current_fh, 643 create->cr_name, create->cr_namelen, 644 &create->cr_iattr, S_IFBLK, rdev, &resfh); 645 break; 646 647 case NF4CHR: 648 status = nfserr_inval; 649 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 650 if (MAJOR(rdev) != create->cr_specdata1 || 651 MINOR(rdev) != create->cr_specdata2) 652 goto out_umask; 653 status = nfsd_create(rqstp, &cstate->current_fh, 654 create->cr_name, create->cr_namelen, 655 &create->cr_iattr,S_IFCHR, rdev, &resfh); 656 break; 657 658 case NF4SOCK: 659 status = nfsd_create(rqstp, &cstate->current_fh, 660 create->cr_name, create->cr_namelen, 661 &create->cr_iattr, S_IFSOCK, 0, &resfh); 662 break; 663 664 case NF4FIFO: 665 status = nfsd_create(rqstp, &cstate->current_fh, 666 create->cr_name, create->cr_namelen, 667 &create->cr_iattr, S_IFIFO, 0, &resfh); 668 break; 669 670 case NF4DIR: 671 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 672 status = nfsd_create(rqstp, &cstate->current_fh, 673 create->cr_name, create->cr_namelen, 674 &create->cr_iattr, S_IFDIR, 0, &resfh); 675 break; 676 677 default: 678 status = nfserr_badtype; 679 } 680 681 if (status) 682 goto out; 683 684 if (create->cr_label.len) 685 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 686 687 if (create->cr_acl != NULL) 688 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 689 create->cr_bmval); 690 691 fh_unlock(&cstate->current_fh); 692 set_change_info(&create->cr_cinfo, &cstate->current_fh); 693 fh_dup2(&cstate->current_fh, &resfh); 694 out: 695 fh_put(&resfh); 696 out_umask: 697 current->fs->umask = 0; 698 return status; 699 } 700 701 static __be32 702 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 703 union nfsd4_op_u *u) 704 { 705 struct nfsd4_getattr *getattr = &u->getattr; 706 __be32 status; 707 708 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 709 if (status) 710 return status; 711 712 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 713 return nfserr_inval; 714 715 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 716 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 717 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 718 719 getattr->ga_fhp = &cstate->current_fh; 720 return nfs_ok; 721 } 722 723 static __be32 724 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 725 union nfsd4_op_u *u) 726 { 727 struct nfsd4_link *link = &u->link; 728 __be32 status; 729 730 status = nfsd_link(rqstp, &cstate->current_fh, 731 link->li_name, link->li_namelen, &cstate->save_fh); 732 if (!status) 733 set_change_info(&link->li_cinfo, &cstate->current_fh); 734 return status; 735 } 736 737 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 738 { 739 struct svc_fh tmp_fh; 740 __be32 ret; 741 742 fh_init(&tmp_fh, NFS4_FHSIZE); 743 ret = exp_pseudoroot(rqstp, &tmp_fh); 744 if (ret) 745 return ret; 746 if (tmp_fh.fh_dentry == fh->fh_dentry) { 747 fh_put(&tmp_fh); 748 return nfserr_noent; 749 } 750 fh_put(&tmp_fh); 751 return nfsd_lookup(rqstp, fh, "..", 2, fh); 752 } 753 754 static __be32 755 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 756 union nfsd4_op_u *u) 757 { 758 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 759 } 760 761 static __be32 762 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 763 union nfsd4_op_u *u) 764 { 765 return nfsd_lookup(rqstp, &cstate->current_fh, 766 u->lookup.lo_name, u->lookup.lo_len, 767 &cstate->current_fh); 768 } 769 770 static __be32 771 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 772 union nfsd4_op_u *u) 773 { 774 struct nfsd4_read *read = &u->read; 775 __be32 status; 776 777 read->rd_nf = NULL; 778 if (read->rd_offset >= OFFSET_MAX) 779 return nfserr_inval; 780 781 trace_nfsd_read_start(rqstp, &cstate->current_fh, 782 read->rd_offset, read->rd_length); 783 784 /* 785 * If we do a zero copy read, then a client will see read data 786 * that reflects the state of the file *after* performing the 787 * following compound. 788 * 789 * To ensure proper ordering, we therefore turn off zero copy if 790 * the client wants us to do more in this compound: 791 */ 792 if (!nfsd4_last_compound_op(rqstp)) 793 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 794 795 /* check stateid */ 796 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 797 &read->rd_stateid, RD_STATE, 798 &read->rd_nf, NULL); 799 if (status) { 800 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 801 goto out; 802 } 803 status = nfs_ok; 804 out: 805 read->rd_rqstp = rqstp; 806 read->rd_fhp = &cstate->current_fh; 807 return status; 808 } 809 810 811 static void 812 nfsd4_read_release(union nfsd4_op_u *u) 813 { 814 if (u->read.rd_nf) 815 nfsd_file_put(u->read.rd_nf); 816 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 817 u->read.rd_offset, u->read.rd_length); 818 } 819 820 static __be32 821 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 822 union nfsd4_op_u *u) 823 { 824 struct nfsd4_readdir *readdir = &u->readdir; 825 u64 cookie = readdir->rd_cookie; 826 static const nfs4_verifier zeroverf; 827 828 /* no need to check permission - this will be done in nfsd_readdir() */ 829 830 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 831 return nfserr_inval; 832 833 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 834 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 835 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 836 837 if ((cookie == 1) || (cookie == 2) || 838 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 839 return nfserr_bad_cookie; 840 841 readdir->rd_rqstp = rqstp; 842 readdir->rd_fhp = &cstate->current_fh; 843 return nfs_ok; 844 } 845 846 static __be32 847 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 848 union nfsd4_op_u *u) 849 { 850 u->readlink.rl_rqstp = rqstp; 851 u->readlink.rl_fhp = &cstate->current_fh; 852 return nfs_ok; 853 } 854 855 static __be32 856 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 857 union nfsd4_op_u *u) 858 { 859 struct nfsd4_remove *remove = &u->remove; 860 __be32 status; 861 862 if (opens_in_grace(SVC_NET(rqstp))) 863 return nfserr_grace; 864 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 865 remove->rm_name, remove->rm_namelen); 866 if (!status) { 867 fh_unlock(&cstate->current_fh); 868 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 869 } 870 return status; 871 } 872 873 static __be32 874 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 875 union nfsd4_op_u *u) 876 { 877 struct nfsd4_rename *rename = &u->rename; 878 __be32 status; 879 880 if (opens_in_grace(SVC_NET(rqstp))) 881 return nfserr_grace; 882 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 883 rename->rn_snamelen, &cstate->current_fh, 884 rename->rn_tname, rename->rn_tnamelen); 885 if (status) 886 return status; 887 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 888 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 889 return nfs_ok; 890 } 891 892 static __be32 893 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 894 union nfsd4_op_u *u) 895 { 896 struct nfsd4_secinfo *secinfo = &u->secinfo; 897 struct svc_export *exp; 898 struct dentry *dentry; 899 __be32 err; 900 901 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 902 if (err) 903 return err; 904 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 905 secinfo->si_name, secinfo->si_namelen, 906 &exp, &dentry); 907 if (err) 908 return err; 909 fh_unlock(&cstate->current_fh); 910 if (d_really_is_negative(dentry)) { 911 exp_put(exp); 912 err = nfserr_noent; 913 } else 914 secinfo->si_exp = exp; 915 dput(dentry); 916 if (cstate->minorversion) 917 /* See rfc 5661 section 2.6.3.1.1.8 */ 918 fh_put(&cstate->current_fh); 919 return err; 920 } 921 922 static __be32 923 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 924 union nfsd4_op_u *u) 925 { 926 __be32 err; 927 928 switch (u->secinfo_no_name.sin_style) { 929 case NFS4_SECINFO_STYLE4_CURRENT_FH: 930 break; 931 case NFS4_SECINFO_STYLE4_PARENT: 932 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 933 if (err) 934 return err; 935 break; 936 default: 937 return nfserr_inval; 938 } 939 940 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 941 fh_put(&cstate->current_fh); 942 return nfs_ok; 943 } 944 945 static void 946 nfsd4_secinfo_release(union nfsd4_op_u *u) 947 { 948 if (u->secinfo.si_exp) 949 exp_put(u->secinfo.si_exp); 950 } 951 952 static void 953 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 954 { 955 if (u->secinfo_no_name.sin_exp) 956 exp_put(u->secinfo_no_name.sin_exp); 957 } 958 959 static __be32 960 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 961 union nfsd4_op_u *u) 962 { 963 struct nfsd4_setattr *setattr = &u->setattr; 964 __be32 status = nfs_ok; 965 int err; 966 967 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 968 status = nfs4_preprocess_stateid_op(rqstp, cstate, 969 &cstate->current_fh, &setattr->sa_stateid, 970 WR_STATE, NULL, NULL); 971 if (status) { 972 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 973 return status; 974 } 975 } 976 err = fh_want_write(&cstate->current_fh); 977 if (err) 978 return nfserrno(err); 979 status = nfs_ok; 980 981 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 982 nfsd_attrmask); 983 if (status) 984 goto out; 985 986 if (setattr->sa_acl != NULL) 987 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 988 setattr->sa_acl); 989 if (status) 990 goto out; 991 if (setattr->sa_label.len) 992 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 993 &setattr->sa_label); 994 if (status) 995 goto out; 996 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 997 0, (time64_t)0); 998 out: 999 fh_drop_write(&cstate->current_fh); 1000 return status; 1001 } 1002 1003 static __be32 1004 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1005 union nfsd4_op_u *u) 1006 { 1007 struct nfsd4_write *write = &u->write; 1008 stateid_t *stateid = &write->wr_stateid; 1009 struct nfsd_file *nf = NULL; 1010 __be32 status = nfs_ok; 1011 unsigned long cnt; 1012 int nvecs; 1013 1014 if (write->wr_offset >= OFFSET_MAX) 1015 return nfserr_inval; 1016 1017 cnt = write->wr_buflen; 1018 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1019 write->wr_offset, cnt); 1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1021 stateid, WR_STATE, &nf, NULL); 1022 if (status) { 1023 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1024 return status; 1025 } 1026 1027 write->wr_how_written = write->wr_stable_how; 1028 1029 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages, 1030 write->wr_payload.head, write->wr_buflen); 1031 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1032 1033 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1034 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1035 write->wr_how_written, 1036 (__be32 *)write->wr_verifier.data); 1037 nfsd_file_put(nf); 1038 1039 write->wr_bytes_written = cnt; 1040 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1041 write->wr_offset, cnt); 1042 return status; 1043 } 1044 1045 static __be32 1046 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1047 stateid_t *src_stateid, struct nfsd_file **src, 1048 stateid_t *dst_stateid, struct nfsd_file **dst) 1049 { 1050 __be32 status; 1051 1052 if (!cstate->save_fh.fh_dentry) 1053 return nfserr_nofilehandle; 1054 1055 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1056 src_stateid, RD_STATE, src, NULL); 1057 if (status) { 1058 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1059 goto out; 1060 } 1061 1062 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1063 dst_stateid, WR_STATE, dst, NULL); 1064 if (status) { 1065 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1066 goto out_put_src; 1067 } 1068 1069 /* fix up for NFS-specific error code */ 1070 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1071 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1072 status = nfserr_wrong_type; 1073 goto out_put_dst; 1074 } 1075 1076 out: 1077 return status; 1078 out_put_dst: 1079 nfsd_file_put(*dst); 1080 out_put_src: 1081 nfsd_file_put(*src); 1082 goto out; 1083 } 1084 1085 static __be32 1086 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1087 union nfsd4_op_u *u) 1088 { 1089 struct nfsd4_clone *clone = &u->clone; 1090 struct nfsd_file *src, *dst; 1091 __be32 status; 1092 1093 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1094 &clone->cl_dst_stateid, &dst); 1095 if (status) 1096 goto out; 1097 1098 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1099 dst, clone->cl_dst_pos, clone->cl_count, 1100 EX_ISSYNC(cstate->current_fh.fh_export)); 1101 1102 nfsd_file_put(dst); 1103 nfsd_file_put(src); 1104 out: 1105 return status; 1106 } 1107 1108 void nfs4_put_copy(struct nfsd4_copy *copy) 1109 { 1110 if (!refcount_dec_and_test(©->refcount)) 1111 return; 1112 kfree(copy); 1113 } 1114 1115 static bool 1116 check_and_set_stop_copy(struct nfsd4_copy *copy) 1117 { 1118 bool value; 1119 1120 spin_lock(©->cp_clp->async_lock); 1121 value = copy->stopped; 1122 if (!copy->stopped) 1123 copy->stopped = true; 1124 spin_unlock(©->cp_clp->async_lock); 1125 return value; 1126 } 1127 1128 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1129 { 1130 /* only 1 thread should stop the copy */ 1131 if (!check_and_set_stop_copy(copy)) 1132 kthread_stop(copy->copy_task); 1133 nfs4_put_copy(copy); 1134 } 1135 1136 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1137 { 1138 struct nfsd4_copy *copy = NULL; 1139 1140 spin_lock(&clp->async_lock); 1141 if (!list_empty(&clp->async_copies)) { 1142 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1143 copies); 1144 refcount_inc(©->refcount); 1145 } 1146 spin_unlock(&clp->async_lock); 1147 return copy; 1148 } 1149 1150 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1151 { 1152 struct nfsd4_copy *copy; 1153 1154 while ((copy = nfsd4_get_copy(clp)) != NULL) 1155 nfsd4_stop_copy(copy); 1156 } 1157 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 1158 1159 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1160 struct nfs_fh *src_fh, 1161 nfs4_stateid *stateid); 1162 extern void nfs42_ssc_close(struct file *filep); 1163 1164 extern void nfs_sb_deactive(struct super_block *sb); 1165 1166 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1167 1168 /* 1169 * Support one copy source server for now. 1170 */ 1171 static __be32 1172 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1173 struct vfsmount **mount) 1174 { 1175 struct file_system_type *type; 1176 struct vfsmount *ss_mnt; 1177 struct nfs42_netaddr *naddr; 1178 struct sockaddr_storage tmp_addr; 1179 size_t tmp_addrlen, match_netid_len = 3; 1180 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1181 char *ipaddr, *dev_name, *raw_data; 1182 int len, raw_len; 1183 __be32 status = nfserr_inval; 1184 1185 naddr = &nss->u.nl4_addr; 1186 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1187 naddr->addr_len, 1188 (struct sockaddr *)&tmp_addr, 1189 sizeof(tmp_addr)); 1190 if (tmp_addrlen == 0) 1191 goto out_err; 1192 1193 if (tmp_addr.ss_family == AF_INET6) { 1194 startsep = "["; 1195 endsep = "]"; 1196 match_netid = "tcp6"; 1197 match_netid_len = 4; 1198 } 1199 1200 if (naddr->netid_len != match_netid_len || 1201 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1202 goto out_err; 1203 1204 /* Construct the raw data for the vfs_kern_mount call */ 1205 len = RPC_MAX_ADDRBUFLEN + 1; 1206 ipaddr = kzalloc(len, GFP_KERNEL); 1207 if (!ipaddr) 1208 goto out_err; 1209 1210 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1211 1212 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1213 1214 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1215 raw_data = kzalloc(raw_len, GFP_KERNEL); 1216 if (!raw_data) 1217 goto out_free_ipaddr; 1218 1219 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1220 1221 status = nfserr_nodev; 1222 type = get_fs_type("nfs"); 1223 if (!type) 1224 goto out_free_rawdata; 1225 1226 /* Set the server:<export> for the vfs_kern_mount call */ 1227 dev_name = kzalloc(len + 5, GFP_KERNEL); 1228 if (!dev_name) 1229 goto out_free_rawdata; 1230 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1231 1232 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1233 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1234 module_put(type->owner); 1235 if (IS_ERR(ss_mnt)) 1236 goto out_free_devname; 1237 1238 status = 0; 1239 *mount = ss_mnt; 1240 1241 out_free_devname: 1242 kfree(dev_name); 1243 out_free_rawdata: 1244 kfree(raw_data); 1245 out_free_ipaddr: 1246 kfree(ipaddr); 1247 out_err: 1248 return status; 1249 } 1250 1251 static void 1252 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1253 { 1254 nfs_do_sb_deactive(ss_mnt->mnt_sb); 1255 mntput(ss_mnt); 1256 } 1257 1258 /* 1259 * Verify COPY destination stateid. 1260 * 1261 * Connect to the source server with NFSv4.1. 1262 * Create the source struct file for nfsd_copy_range. 1263 * Called with COPY cstate: 1264 * SAVED_FH: source filehandle 1265 * CURRENT_FH: destination filehandle 1266 */ 1267 static __be32 1268 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1269 struct nfsd4_compound_state *cstate, 1270 struct nfsd4_copy *copy, struct vfsmount **mount) 1271 { 1272 struct svc_fh *s_fh = NULL; 1273 stateid_t *s_stid = ©->cp_src_stateid; 1274 __be32 status = nfserr_inval; 1275 1276 /* Verify the destination stateid and set dst struct file*/ 1277 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1278 ©->cp_dst_stateid, 1279 WR_STATE, ©->nf_dst, NULL); 1280 if (status) 1281 goto out; 1282 1283 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); 1284 if (status) 1285 goto out; 1286 1287 s_fh = &cstate->save_fh; 1288 1289 copy->c_fh.size = s_fh->fh_handle.fh_size; 1290 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); 1291 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1292 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1293 sizeof(stateid_opaque_t)); 1294 1295 status = 0; 1296 out: 1297 return status; 1298 } 1299 1300 static void 1301 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1302 struct nfsd_file *dst) 1303 { 1304 nfs42_ssc_close(src->nf_file); 1305 fput(src->nf_file); 1306 nfsd_file_put(dst); 1307 mntput(ss_mnt); 1308 } 1309 1310 #else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1311 1312 static __be32 1313 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1314 struct nfsd4_compound_state *cstate, 1315 struct nfsd4_copy *copy, 1316 struct vfsmount **mount) 1317 { 1318 *mount = NULL; 1319 return nfserr_inval; 1320 } 1321 1322 static void 1323 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1324 struct nfsd_file *dst) 1325 { 1326 } 1327 1328 static void 1329 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1330 { 1331 } 1332 1333 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1334 struct nfs_fh *src_fh, 1335 nfs4_stateid *stateid) 1336 { 1337 return NULL; 1338 } 1339 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1340 1341 static __be32 1342 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1343 struct nfsd4_compound_state *cstate, 1344 struct nfsd4_copy *copy) 1345 { 1346 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1347 ©->nf_src, ©->cp_dst_stateid, 1348 ©->nf_dst); 1349 } 1350 1351 static void 1352 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) 1353 { 1354 nfsd_file_put(src); 1355 nfsd_file_put(dst); 1356 } 1357 1358 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1359 { 1360 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1361 1362 nfs4_put_copy(copy); 1363 } 1364 1365 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1366 struct rpc_task *task) 1367 { 1368 return 1; 1369 } 1370 1371 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1372 .release = nfsd4_cb_offload_release, 1373 .done = nfsd4_cb_offload_done 1374 }; 1375 1376 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1377 { 1378 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1379 copy->cp_synchronous = sync; 1380 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1381 } 1382 1383 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1384 { 1385 ssize_t bytes_copied = 0; 1386 u64 bytes_total = copy->cp_count; 1387 u64 src_pos = copy->cp_src_pos; 1388 u64 dst_pos = copy->cp_dst_pos; 1389 1390 /* See RFC 7862 p.67: */ 1391 if (bytes_total == 0) 1392 bytes_total = ULLONG_MAX; 1393 do { 1394 if (kthread_should_stop()) 1395 break; 1396 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, 1397 src_pos, copy->nf_dst->nf_file, dst_pos, 1398 bytes_total); 1399 if (bytes_copied <= 0) 1400 break; 1401 bytes_total -= bytes_copied; 1402 copy->cp_res.wr_bytes_written += bytes_copied; 1403 src_pos += bytes_copied; 1404 dst_pos += bytes_copied; 1405 } while (bytes_total > 0 && !copy->cp_synchronous); 1406 return bytes_copied; 1407 } 1408 1409 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1410 { 1411 __be32 status; 1412 ssize_t bytes; 1413 1414 bytes = _nfsd_copy_file_range(copy); 1415 /* for async copy, we ignore the error, client can always retry 1416 * to get the error 1417 */ 1418 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1419 status = nfserrno(bytes); 1420 else { 1421 nfsd4_init_copy_res(copy, sync); 1422 status = nfs_ok; 1423 } 1424 1425 if (!copy->cp_intra) /* Inter server SSC */ 1426 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, 1427 copy->nf_dst); 1428 else 1429 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); 1430 1431 return status; 1432 } 1433 1434 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1435 { 1436 dst->cp_src_pos = src->cp_src_pos; 1437 dst->cp_dst_pos = src->cp_dst_pos; 1438 dst->cp_count = src->cp_count; 1439 dst->cp_synchronous = src->cp_synchronous; 1440 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1441 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1442 dst->cp_clp = src->cp_clp; 1443 dst->nf_dst = nfsd_file_get(src->nf_dst); 1444 dst->cp_intra = src->cp_intra; 1445 if (src->cp_intra) /* for inter, file_src doesn't exist yet */ 1446 dst->nf_src = nfsd_file_get(src->nf_src); 1447 1448 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1449 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); 1450 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1451 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1452 dst->ss_mnt = src->ss_mnt; 1453 } 1454 1455 static void cleanup_async_copy(struct nfsd4_copy *copy) 1456 { 1457 nfs4_free_copy_state(copy); 1458 nfsd_file_put(copy->nf_dst); 1459 if (copy->cp_intra) 1460 nfsd_file_put(copy->nf_src); 1461 spin_lock(©->cp_clp->async_lock); 1462 list_del(©->copies); 1463 spin_unlock(©->cp_clp->async_lock); 1464 nfs4_put_copy(copy); 1465 } 1466 1467 static int nfsd4_do_async_copy(void *data) 1468 { 1469 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1470 struct nfsd4_copy *cb_copy; 1471 1472 if (!copy->cp_intra) { /* Inter server SSC */ 1473 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1474 if (!copy->nf_src) { 1475 copy->nfserr = nfserr_serverfault; 1476 nfsd4_interssc_disconnect(copy->ss_mnt); 1477 goto do_callback; 1478 } 1479 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1480 ©->stateid); 1481 if (IS_ERR(copy->nf_src->nf_file)) { 1482 copy->nfserr = nfserr_offload_denied; 1483 nfsd4_interssc_disconnect(copy->ss_mnt); 1484 goto do_callback; 1485 } 1486 } 1487 1488 copy->nfserr = nfsd4_do_copy(copy, 0); 1489 do_callback: 1490 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1491 if (!cb_copy) 1492 goto out; 1493 refcount_set(&cb_copy->refcount, 1); 1494 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1495 cb_copy->cp_clp = copy->cp_clp; 1496 cb_copy->nfserr = copy->nfserr; 1497 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1498 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1499 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1500 nfsd4_run_cb(&cb_copy->cp_cb); 1501 out: 1502 if (!copy->cp_intra) 1503 kfree(copy->nf_src); 1504 cleanup_async_copy(copy); 1505 return 0; 1506 } 1507 1508 static __be32 1509 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1510 union nfsd4_op_u *u) 1511 { 1512 struct nfsd4_copy *copy = &u->copy; 1513 __be32 status; 1514 struct nfsd4_copy *async_copy = NULL; 1515 1516 if (!copy->cp_intra) { /* Inter server SSC */ 1517 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1518 status = nfserr_notsupp; 1519 goto out; 1520 } 1521 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1522 ©->ss_mnt); 1523 if (status) 1524 return nfserr_offload_denied; 1525 } else { 1526 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1527 if (status) 1528 return status; 1529 } 1530 1531 copy->cp_clp = cstate->clp; 1532 memcpy(©->fh, &cstate->current_fh.fh_handle, 1533 sizeof(struct knfsd_fh)); 1534 if (!copy->cp_synchronous) { 1535 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1536 1537 status = nfserrno(-ENOMEM); 1538 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1539 if (!async_copy) 1540 goto out_err; 1541 if (!nfs4_init_copy_state(nn, copy)) 1542 goto out_err; 1543 refcount_set(&async_copy->refcount, 1); 1544 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.stid, 1545 sizeof(copy->cp_res.cb_stateid)); 1546 dup_copy_fields(copy, async_copy); 1547 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1548 async_copy, "%s", "copy thread"); 1549 if (IS_ERR(async_copy->copy_task)) 1550 goto out_err; 1551 spin_lock(&async_copy->cp_clp->async_lock); 1552 list_add(&async_copy->copies, 1553 &async_copy->cp_clp->async_copies); 1554 spin_unlock(&async_copy->cp_clp->async_lock); 1555 wake_up_process(async_copy->copy_task); 1556 status = nfs_ok; 1557 } else { 1558 status = nfsd4_do_copy(copy, 1); 1559 } 1560 out: 1561 return status; 1562 out_err: 1563 if (async_copy) 1564 cleanup_async_copy(async_copy); 1565 status = nfserrno(-ENOMEM); 1566 if (!copy->cp_intra) 1567 nfsd4_interssc_disconnect(copy->ss_mnt); 1568 goto out; 1569 } 1570 1571 struct nfsd4_copy * 1572 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1573 { 1574 struct nfsd4_copy *copy; 1575 1576 spin_lock(&clp->async_lock); 1577 list_for_each_entry(copy, &clp->async_copies, copies) { 1578 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1579 continue; 1580 refcount_inc(©->refcount); 1581 spin_unlock(&clp->async_lock); 1582 return copy; 1583 } 1584 spin_unlock(&clp->async_lock); 1585 return NULL; 1586 } 1587 1588 static __be32 1589 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1590 struct nfsd4_compound_state *cstate, 1591 union nfsd4_op_u *u) 1592 { 1593 struct nfsd4_offload_status *os = &u->offload_status; 1594 struct nfsd4_copy *copy; 1595 struct nfs4_client *clp = cstate->clp; 1596 1597 copy = find_async_copy(clp, &os->stateid); 1598 if (!copy) { 1599 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1600 1601 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1602 } else 1603 nfsd4_stop_copy(copy); 1604 1605 return nfs_ok; 1606 } 1607 1608 static __be32 1609 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1610 union nfsd4_op_u *u) 1611 { 1612 struct nfsd4_copy_notify *cn = &u->copy_notify; 1613 __be32 status; 1614 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1615 struct nfs4_stid *stid; 1616 struct nfs4_cpntf_state *cps; 1617 struct nfs4_client *clp = cstate->clp; 1618 1619 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1620 &cn->cpn_src_stateid, RD_STATE, NULL, 1621 &stid); 1622 if (status) 1623 return status; 1624 1625 cn->cpn_sec = nn->nfsd4_lease; 1626 cn->cpn_nsec = 0; 1627 1628 status = nfserrno(-ENOMEM); 1629 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1630 if (!cps) 1631 goto out; 1632 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1633 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1634 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1635 1636 /* For now, only return one server address in cpn_src, the 1637 * address used by the client to connect to this server. 1638 */ 1639 cn->cpn_src.nl4_type = NL4_NETADDR; 1640 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1641 &cn->cpn_src.u.nl4_addr); 1642 WARN_ON_ONCE(status); 1643 if (status) { 1644 nfs4_put_cpntf_state(nn, cps); 1645 goto out; 1646 } 1647 out: 1648 nfs4_put_stid(stid); 1649 return status; 1650 } 1651 1652 static __be32 1653 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1654 struct nfsd4_fallocate *fallocate, int flags) 1655 { 1656 __be32 status; 1657 struct nfsd_file *nf; 1658 1659 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1660 &fallocate->falloc_stateid, 1661 WR_STATE, &nf, NULL); 1662 if (status != nfs_ok) { 1663 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1664 return status; 1665 } 1666 1667 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1668 fallocate->falloc_offset, 1669 fallocate->falloc_length, 1670 flags); 1671 nfsd_file_put(nf); 1672 return status; 1673 } 1674 static __be32 1675 nfsd4_offload_status(struct svc_rqst *rqstp, 1676 struct nfsd4_compound_state *cstate, 1677 union nfsd4_op_u *u) 1678 { 1679 struct nfsd4_offload_status *os = &u->offload_status; 1680 __be32 status = 0; 1681 struct nfsd4_copy *copy; 1682 struct nfs4_client *clp = cstate->clp; 1683 1684 copy = find_async_copy(clp, &os->stateid); 1685 if (copy) { 1686 os->count = copy->cp_res.wr_bytes_written; 1687 nfs4_put_copy(copy); 1688 } else 1689 status = nfserr_bad_stateid; 1690 1691 return status; 1692 } 1693 1694 static __be32 1695 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1696 union nfsd4_op_u *u) 1697 { 1698 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1699 } 1700 1701 static __be32 1702 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1703 union nfsd4_op_u *u) 1704 { 1705 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1706 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1707 } 1708 1709 static __be32 1710 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1711 union nfsd4_op_u *u) 1712 { 1713 struct nfsd4_seek *seek = &u->seek; 1714 int whence; 1715 __be32 status; 1716 struct nfsd_file *nf; 1717 1718 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1719 &seek->seek_stateid, 1720 RD_STATE, &nf, NULL); 1721 if (status) { 1722 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1723 return status; 1724 } 1725 1726 switch (seek->seek_whence) { 1727 case NFS4_CONTENT_DATA: 1728 whence = SEEK_DATA; 1729 break; 1730 case NFS4_CONTENT_HOLE: 1731 whence = SEEK_HOLE; 1732 break; 1733 default: 1734 status = nfserr_union_notsupp; 1735 goto out; 1736 } 1737 1738 /* 1739 * Note: This call does change file->f_pos, but nothing in NFSD 1740 * should ever file->f_pos. 1741 */ 1742 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1743 if (seek->seek_pos < 0) 1744 status = nfserrno(seek->seek_pos); 1745 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1746 seek->seek_eof = true; 1747 1748 out: 1749 nfsd_file_put(nf); 1750 return status; 1751 } 1752 1753 /* This routine never returns NFS_OK! If there are no other errors, it 1754 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1755 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1756 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1757 */ 1758 static __be32 1759 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1760 struct nfsd4_verify *verify) 1761 { 1762 __be32 *buf, *p; 1763 int count; 1764 __be32 status; 1765 1766 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1767 if (status) 1768 return status; 1769 1770 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1771 if (status) 1772 return status; 1773 1774 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1775 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1776 return nfserr_inval; 1777 if (verify->ve_attrlen & 3) 1778 return nfserr_inval; 1779 1780 /* count in words: 1781 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1782 */ 1783 count = 4 + (verify->ve_attrlen >> 2); 1784 buf = kmalloc(count << 2, GFP_KERNEL); 1785 if (!buf) 1786 return nfserr_jukebox; 1787 1788 p = buf; 1789 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1790 cstate->current_fh.fh_export, 1791 cstate->current_fh.fh_dentry, 1792 verify->ve_bmval, 1793 rqstp, 0); 1794 /* 1795 * If nfsd4_encode_fattr() ran out of space, assume that's because 1796 * the attributes are longer (hence different) than those given: 1797 */ 1798 if (status == nfserr_resource) 1799 status = nfserr_not_same; 1800 if (status) 1801 goto out_kfree; 1802 1803 /* skip bitmap */ 1804 p = buf + 1 + ntohl(buf[0]); 1805 status = nfserr_not_same; 1806 if (ntohl(*p++) != verify->ve_attrlen) 1807 goto out_kfree; 1808 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1809 status = nfserr_same; 1810 1811 out_kfree: 1812 kfree(buf); 1813 return status; 1814 } 1815 1816 static __be32 1817 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1818 union nfsd4_op_u *u) 1819 { 1820 __be32 status; 1821 1822 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1823 return status == nfserr_not_same ? nfs_ok : status; 1824 } 1825 1826 static __be32 1827 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1828 union nfsd4_op_u *u) 1829 { 1830 __be32 status; 1831 1832 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1833 return status == nfserr_same ? nfs_ok : status; 1834 } 1835 1836 #ifdef CONFIG_NFSD_PNFS 1837 static const struct nfsd4_layout_ops * 1838 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1839 { 1840 if (!exp->ex_layout_types) { 1841 dprintk("%s: export does not support pNFS\n", __func__); 1842 return NULL; 1843 } 1844 1845 if (layout_type >= LAYOUT_TYPE_MAX || 1846 !(exp->ex_layout_types & (1 << layout_type))) { 1847 dprintk("%s: layout type %d not supported\n", 1848 __func__, layout_type); 1849 return NULL; 1850 } 1851 1852 return nfsd4_layout_ops[layout_type]; 1853 } 1854 1855 static __be32 1856 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1857 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1858 { 1859 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1860 const struct nfsd4_layout_ops *ops; 1861 struct nfsd4_deviceid_map *map; 1862 struct svc_export *exp; 1863 __be32 nfserr; 1864 1865 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1866 __func__, 1867 gdp->gd_layout_type, 1868 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1869 gdp->gd_maxcount); 1870 1871 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1872 if (!map) { 1873 dprintk("%s: couldn't find device ID to export mapping!\n", 1874 __func__); 1875 return nfserr_noent; 1876 } 1877 1878 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1879 if (IS_ERR(exp)) { 1880 dprintk("%s: could not find device id\n", __func__); 1881 return nfserr_noent; 1882 } 1883 1884 nfserr = nfserr_layoutunavailable; 1885 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1886 if (!ops) 1887 goto out; 1888 1889 nfserr = nfs_ok; 1890 if (gdp->gd_maxcount != 0) { 1891 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1892 rqstp, cstate->clp, gdp); 1893 } 1894 1895 gdp->gd_notify_types &= ops->notify_types; 1896 out: 1897 exp_put(exp); 1898 return nfserr; 1899 } 1900 1901 static void 1902 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1903 { 1904 kfree(u->getdeviceinfo.gd_device); 1905 } 1906 1907 static __be32 1908 nfsd4_layoutget(struct svc_rqst *rqstp, 1909 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1910 { 1911 struct nfsd4_layoutget *lgp = &u->layoutget; 1912 struct svc_fh *current_fh = &cstate->current_fh; 1913 const struct nfsd4_layout_ops *ops; 1914 struct nfs4_layout_stateid *ls; 1915 __be32 nfserr; 1916 int accmode = NFSD_MAY_READ_IF_EXEC; 1917 1918 switch (lgp->lg_seg.iomode) { 1919 case IOMODE_READ: 1920 accmode |= NFSD_MAY_READ; 1921 break; 1922 case IOMODE_RW: 1923 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1924 break; 1925 default: 1926 dprintk("%s: invalid iomode %d\n", 1927 __func__, lgp->lg_seg.iomode); 1928 nfserr = nfserr_badiomode; 1929 goto out; 1930 } 1931 1932 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1933 if (nfserr) 1934 goto out; 1935 1936 nfserr = nfserr_layoutunavailable; 1937 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1938 if (!ops) 1939 goto out; 1940 1941 /* 1942 * Verify minlength and range as per RFC5661: 1943 * o If loga_length is less than loga_minlength, 1944 * the metadata server MUST return NFS4ERR_INVAL. 1945 * o If the sum of loga_offset and loga_minlength exceeds 1946 * NFS4_UINT64_MAX, and loga_minlength is not 1947 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1948 * o If the sum of loga_offset and loga_length exceeds 1949 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1950 * the error NFS4ERR_INVAL MUST result. 1951 */ 1952 nfserr = nfserr_inval; 1953 if (lgp->lg_seg.length < lgp->lg_minlength || 1954 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1955 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1956 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1957 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1958 goto out; 1959 if (lgp->lg_seg.length == 0) 1960 goto out; 1961 1962 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1963 true, lgp->lg_layout_type, &ls); 1964 if (nfserr) { 1965 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1966 goto out; 1967 } 1968 1969 nfserr = nfserr_recallconflict; 1970 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1971 goto out_put_stid; 1972 1973 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1974 current_fh, lgp); 1975 if (nfserr) 1976 goto out_put_stid; 1977 1978 nfserr = nfsd4_insert_layout(lgp, ls); 1979 1980 out_put_stid: 1981 mutex_unlock(&ls->ls_mutex); 1982 nfs4_put_stid(&ls->ls_stid); 1983 out: 1984 return nfserr; 1985 } 1986 1987 static void 1988 nfsd4_layoutget_release(union nfsd4_op_u *u) 1989 { 1990 kfree(u->layoutget.lg_content); 1991 } 1992 1993 static __be32 1994 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1995 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1996 { 1997 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1998 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1999 struct svc_fh *current_fh = &cstate->current_fh; 2000 const struct nfsd4_layout_ops *ops; 2001 loff_t new_size = lcp->lc_last_wr + 1; 2002 struct inode *inode; 2003 struct nfs4_layout_stateid *ls; 2004 __be32 nfserr; 2005 2006 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2007 if (nfserr) 2008 goto out; 2009 2010 nfserr = nfserr_layoutunavailable; 2011 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2012 if (!ops) 2013 goto out; 2014 inode = d_inode(current_fh->fh_dentry); 2015 2016 nfserr = nfserr_inval; 2017 if (new_size <= seg->offset) { 2018 dprintk("pnfsd: last write before layout segment\n"); 2019 goto out; 2020 } 2021 if (new_size > seg->offset + seg->length) { 2022 dprintk("pnfsd: last write beyond layout segment\n"); 2023 goto out; 2024 } 2025 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2026 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2027 goto out; 2028 } 2029 2030 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2031 false, lcp->lc_layout_type, 2032 &ls); 2033 if (nfserr) { 2034 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2035 /* fixup error code as per RFC5661 */ 2036 if (nfserr == nfserr_bad_stateid) 2037 nfserr = nfserr_badlayout; 2038 goto out; 2039 } 2040 2041 /* LAYOUTCOMMIT does not require any serialization */ 2042 mutex_unlock(&ls->ls_mutex); 2043 2044 if (new_size > i_size_read(inode)) { 2045 lcp->lc_size_chg = 1; 2046 lcp->lc_newsize = new_size; 2047 } else { 2048 lcp->lc_size_chg = 0; 2049 } 2050 2051 nfserr = ops->proc_layoutcommit(inode, lcp); 2052 nfs4_put_stid(&ls->ls_stid); 2053 out: 2054 return nfserr; 2055 } 2056 2057 static __be32 2058 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2059 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2060 { 2061 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2062 struct svc_fh *current_fh = &cstate->current_fh; 2063 __be32 nfserr; 2064 2065 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2066 if (nfserr) 2067 goto out; 2068 2069 nfserr = nfserr_layoutunavailable; 2070 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2071 goto out; 2072 2073 switch (lrp->lr_seg.iomode) { 2074 case IOMODE_READ: 2075 case IOMODE_RW: 2076 case IOMODE_ANY: 2077 break; 2078 default: 2079 dprintk("%s: invalid iomode %d\n", __func__, 2080 lrp->lr_seg.iomode); 2081 nfserr = nfserr_inval; 2082 goto out; 2083 } 2084 2085 switch (lrp->lr_return_type) { 2086 case RETURN_FILE: 2087 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2088 break; 2089 case RETURN_FSID: 2090 case RETURN_ALL: 2091 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2092 break; 2093 default: 2094 dprintk("%s: invalid return_type %d\n", __func__, 2095 lrp->lr_return_type); 2096 nfserr = nfserr_inval; 2097 break; 2098 } 2099 out: 2100 return nfserr; 2101 } 2102 #endif /* CONFIG_NFSD_PNFS */ 2103 2104 static __be32 2105 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2106 union nfsd4_op_u *u) 2107 { 2108 struct nfsd4_getxattr *getxattr = &u->getxattr; 2109 2110 return nfsd_getxattr(rqstp, &cstate->current_fh, 2111 getxattr->getxa_name, &getxattr->getxa_buf, 2112 &getxattr->getxa_len); 2113 } 2114 2115 static __be32 2116 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2117 union nfsd4_op_u *u) 2118 { 2119 struct nfsd4_setxattr *setxattr = &u->setxattr; 2120 __be32 ret; 2121 2122 if (opens_in_grace(SVC_NET(rqstp))) 2123 return nfserr_grace; 2124 2125 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2126 setxattr->setxa_buf, setxattr->setxa_len, 2127 setxattr->setxa_flags); 2128 2129 if (!ret) 2130 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2131 2132 return ret; 2133 } 2134 2135 static __be32 2136 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2137 union nfsd4_op_u *u) 2138 { 2139 /* 2140 * Get the entire list, then copy out only the user attributes 2141 * in the encode function. 2142 */ 2143 return nfsd_listxattr(rqstp, &cstate->current_fh, 2144 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2145 } 2146 2147 static __be32 2148 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2149 union nfsd4_op_u *u) 2150 { 2151 struct nfsd4_removexattr *removexattr = &u->removexattr; 2152 __be32 ret; 2153 2154 if (opens_in_grace(SVC_NET(rqstp))) 2155 return nfserr_grace; 2156 2157 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2158 removexattr->rmxa_name); 2159 2160 if (!ret) 2161 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2162 2163 return ret; 2164 } 2165 2166 /* 2167 * NULL call. 2168 */ 2169 static __be32 2170 nfsd4_proc_null(struct svc_rqst *rqstp) 2171 { 2172 return rpc_success; 2173 } 2174 2175 static inline void nfsd4_increment_op_stats(u32 opnum) 2176 { 2177 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2178 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]); 2179 } 2180 2181 static const struct nfsd4_operation nfsd4_ops[]; 2182 2183 static const char *nfsd4_op_name(unsigned opnum); 2184 2185 /* 2186 * Enforce NFSv4.1 COMPOUND ordering rules: 2187 * 2188 * Also note, enforced elsewhere: 2189 * - SEQUENCE other than as first op results in 2190 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2191 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2192 * (Enforced in nfsd4_bind_conn_to_session().) 2193 * - DESTROY_SESSION must be the final operation in a compound, if 2194 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2195 * (Enforced in nfsd4_destroy_session().) 2196 */ 2197 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2198 { 2199 struct nfsd4_op *first_op = &args->ops[0]; 2200 2201 /* These ordering requirements don't apply to NFSv4.0: */ 2202 if (args->minorversion == 0) 2203 return nfs_ok; 2204 /* This is weird, but OK, not our problem: */ 2205 if (args->opcnt == 0) 2206 return nfs_ok; 2207 if (first_op->status == nfserr_op_illegal) 2208 return nfs_ok; 2209 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2210 return nfserr_op_not_in_session; 2211 if (first_op->opnum == OP_SEQUENCE) 2212 return nfs_ok; 2213 /* 2214 * So first_op is something allowed outside a session, like 2215 * EXCHANGE_ID; but then it has to be the only op in the 2216 * compound: 2217 */ 2218 if (args->opcnt != 1) 2219 return nfserr_not_only_op; 2220 return nfs_ok; 2221 } 2222 2223 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2224 { 2225 return &nfsd4_ops[op->opnum]; 2226 } 2227 2228 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2229 { 2230 if (op->opnum == OP_ILLEGAL) 2231 return false; 2232 return OPDESC(op)->op_flags & OP_CACHEME; 2233 } 2234 2235 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2236 { 2237 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2238 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2239 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2240 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2241 const struct nfsd4_operation *thisd = OPDESC(this); 2242 const struct nfsd4_operation *nextd; 2243 2244 /* 2245 * Most ops check wronsec on our own; only the putfh-like ops 2246 * have special rules. 2247 */ 2248 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2249 return false; 2250 /* 2251 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2252 * put-filehandle operation if we're not going to use the 2253 * result: 2254 */ 2255 if (argp->opcnt == resp->opcnt) 2256 return false; 2257 if (next->opnum == OP_ILLEGAL) 2258 return false; 2259 nextd = OPDESC(next); 2260 /* 2261 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2262 * errors themselves as necessary; others should check for them 2263 * now: 2264 */ 2265 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2266 } 2267 2268 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2269 static void 2270 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2271 { 2272 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2273 struct nfsd4_copy *copy; 2274 struct nfsd4_putfh *putfh; 2275 int i; 2276 2277 /* traverse all operation and if it's a COPY compound, mark the 2278 * source filehandle to skip verification 2279 */ 2280 for (i = 0; i < args->opcnt; i++) { 2281 op = &args->ops[i]; 2282 if (op->opnum == OP_PUTFH) 2283 current_op = op; 2284 else if (op->opnum == OP_SAVEFH) 2285 saved_op = current_op; 2286 else if (op->opnum == OP_RESTOREFH) 2287 current_op = saved_op; 2288 else if (op->opnum == OP_COPY) { 2289 copy = (struct nfsd4_copy *)&op->u; 2290 if (!saved_op) { 2291 op->status = nfserr_nofilehandle; 2292 return; 2293 } 2294 putfh = (struct nfsd4_putfh *)&saved_op->u; 2295 if (!copy->cp_intra) 2296 putfh->no_verify = true; 2297 } 2298 } 2299 } 2300 #else 2301 static void 2302 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2303 { 2304 } 2305 #endif 2306 2307 /* 2308 * COMPOUND call. 2309 */ 2310 static __be32 2311 nfsd4_proc_compound(struct svc_rqst *rqstp) 2312 { 2313 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2314 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2315 struct nfsd4_op *op; 2316 struct nfsd4_compound_state *cstate = &resp->cstate; 2317 struct svc_fh *current_fh = &cstate->current_fh; 2318 struct svc_fh *save_fh = &cstate->save_fh; 2319 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2320 __be32 status; 2321 2322 resp->xdr = &rqstp->rq_res_stream; 2323 2324 /* reserve space for: NFS status code */ 2325 xdr_reserve_space(resp->xdr, XDR_UNIT); 2326 2327 resp->tagp = resp->xdr->p; 2328 /* reserve space for: taglen, tag, and opcnt */ 2329 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen); 2330 resp->taglen = args->taglen; 2331 resp->tag = args->tag; 2332 resp->rqstp = rqstp; 2333 cstate->minorversion = args->minorversion; 2334 fh_init(current_fh, NFS4_FHSIZE); 2335 fh_init(save_fh, NFS4_FHSIZE); 2336 /* 2337 * Don't use the deferral mechanism for NFSv4; compounds make it 2338 * too hard to avoid non-idempotency problems. 2339 */ 2340 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2341 2342 /* 2343 * According to RFC3010, this takes precedence over all other errors. 2344 */ 2345 status = nfserr_minor_vers_mismatch; 2346 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2347 goto out; 2348 status = nfserr_resource; 2349 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2350 goto out; 2351 2352 status = nfs41_check_op_ordering(args); 2353 if (status) { 2354 op = &args->ops[0]; 2355 op->status = status; 2356 resp->opcnt = 1; 2357 goto encode_op; 2358 } 2359 check_if_stalefh_allowed(args); 2360 2361 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2362 2363 trace_nfsd_compound(rqstp, args->opcnt); 2364 while (!status && resp->opcnt < args->opcnt) { 2365 op = &args->ops[resp->opcnt++]; 2366 2367 /* 2368 * The XDR decode routines may have pre-set op->status; 2369 * for example, if there is a miscellaneous XDR error 2370 * it will be set to nfserr_bad_xdr. 2371 */ 2372 if (op->status) { 2373 if (op->opnum == OP_OPEN) 2374 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2375 goto encode_op; 2376 } 2377 if (!current_fh->fh_dentry && 2378 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2379 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2380 op->status = nfserr_nofilehandle; 2381 goto encode_op; 2382 } 2383 } else if (current_fh->fh_export && 2384 current_fh->fh_export->ex_fslocs.migrated && 2385 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2386 op->status = nfserr_moved; 2387 goto encode_op; 2388 } 2389 2390 fh_clear_wcc(current_fh); 2391 2392 /* If op is non-idempotent */ 2393 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2394 /* 2395 * Don't execute this op if we couldn't encode a 2396 * succesful reply: 2397 */ 2398 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2399 /* 2400 * Plus if there's another operation, make sure 2401 * we'll have space to at least encode an error: 2402 */ 2403 if (resp->opcnt < args->opcnt) 2404 plen += COMPOUND_ERR_SLACK_SPACE; 2405 op->status = nfsd4_check_resp_size(resp, plen); 2406 } 2407 2408 if (op->status) 2409 goto encode_op; 2410 2411 if (op->opdesc->op_get_currentstateid) 2412 op->opdesc->op_get_currentstateid(cstate, &op->u); 2413 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2414 2415 /* Only from SEQUENCE */ 2416 if (cstate->status == nfserr_replay_cache) { 2417 dprintk("%s NFS4.1 replay from cache\n", __func__); 2418 status = op->status; 2419 goto out; 2420 } 2421 if (!op->status) { 2422 if (op->opdesc->op_set_currentstateid) 2423 op->opdesc->op_set_currentstateid(cstate, &op->u); 2424 2425 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2426 clear_current_stateid(cstate); 2427 2428 if (current_fh->fh_export && 2429 need_wrongsec_check(rqstp)) 2430 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2431 } 2432 encode_op: 2433 if (op->status == nfserr_replay_me) { 2434 op->replay = &cstate->replay_owner->so_replay; 2435 nfsd4_encode_replay(resp->xdr, op); 2436 status = op->status = op->replay->rp_status; 2437 } else { 2438 nfsd4_encode_operation(resp, op); 2439 status = op->status; 2440 } 2441 2442 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2443 nfsd4_op_name(op->opnum)); 2444 2445 nfsd4_cstate_clear_replay(cstate); 2446 nfsd4_increment_op_stats(op->opnum); 2447 } 2448 2449 fh_put(current_fh); 2450 fh_put(save_fh); 2451 BUG_ON(cstate->replay_owner); 2452 out: 2453 cstate->status = status; 2454 /* Reset deferral mechanism for RPC deferrals */ 2455 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2456 return rpc_success; 2457 } 2458 2459 #define op_encode_hdr_size (2) 2460 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2461 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2462 #define op_encode_change_info_maxsz (5) 2463 #define nfs4_fattr_bitmap_maxsz (4) 2464 2465 /* We'll fall back on returning no lockowner if run out of space: */ 2466 #define op_encode_lockowner_maxsz (0) 2467 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2468 2469 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2470 2471 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2472 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2473 op_encode_ace_maxsz) 2474 2475 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2476 2477 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2478 { 2479 return (op_encode_hdr_size) * sizeof(__be32); 2480 } 2481 2482 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2483 { 2484 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2485 } 2486 2487 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2488 { 2489 /* ac_supported, ac_resp_access */ 2490 return (op_encode_hdr_size + 2)* sizeof(__be32); 2491 } 2492 2493 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2494 { 2495 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2496 } 2497 2498 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2499 { 2500 return (op_encode_hdr_size + op_encode_change_info_maxsz 2501 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2502 } 2503 2504 /* 2505 * Note since this is an idempotent operation we won't insist on failing 2506 * the op prematurely if the estimate is too large. We may turn off splice 2507 * reads unnecessarily. 2508 */ 2509 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2510 struct nfsd4_op *op) 2511 { 2512 u32 *bmap = op->u.getattr.ga_bmval; 2513 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2514 u32 ret = 0; 2515 2516 if (bmap0 & FATTR4_WORD0_ACL) 2517 return svc_max_payload(rqstp); 2518 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2519 return svc_max_payload(rqstp); 2520 2521 if (bmap1 & FATTR4_WORD1_OWNER) { 2522 ret += IDMAP_NAMESZ + 4; 2523 bmap1 &= ~FATTR4_WORD1_OWNER; 2524 } 2525 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2526 ret += IDMAP_NAMESZ + 4; 2527 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2528 } 2529 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2530 ret += NFS4_FHSIZE + 4; 2531 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2532 } 2533 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2534 ret += NFS4_MAXLABELLEN + 12; 2535 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2536 } 2537 /* 2538 * Largest of remaining attributes are 16 bytes (e.g., 2539 * supported_attributes) 2540 */ 2541 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2542 /* bitmask, length */ 2543 ret += 20; 2544 return ret; 2545 } 2546 2547 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2548 { 2549 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2550 } 2551 2552 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2553 { 2554 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2555 * sizeof(__be32); 2556 } 2557 2558 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2559 { 2560 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2561 * sizeof(__be32); 2562 } 2563 2564 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2565 { 2566 return (op_encode_hdr_size + op_encode_stateid_maxsz 2567 + op_encode_change_info_maxsz + 1 2568 + nfs4_fattr_bitmap_maxsz 2569 + op_encode_delegation_maxsz) * sizeof(__be32); 2570 } 2571 2572 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2573 { 2574 u32 maxcount = 0, rlen = 0; 2575 2576 maxcount = svc_max_payload(rqstp); 2577 rlen = min(op->u.read.rd_length, maxcount); 2578 2579 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2580 } 2581 2582 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2583 { 2584 u32 maxcount = svc_max_payload(rqstp); 2585 u32 rlen = min(op->u.read.rd_length, maxcount); 2586 /* 2587 * If we detect that the file changed during hole encoding, then we 2588 * recover by encoding the remaining reply as data. This means we need 2589 * to set aside enough room to encode two data segments. 2590 */ 2591 u32 seg_len = 2 * (1 + 2 + 1); 2592 2593 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2594 } 2595 2596 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2597 { 2598 u32 maxcount = 0, rlen = 0; 2599 2600 maxcount = svc_max_payload(rqstp); 2601 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2602 2603 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2604 XDR_QUADLEN(rlen)) * sizeof(__be32); 2605 } 2606 2607 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2608 { 2609 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2610 } 2611 2612 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2613 { 2614 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2615 * sizeof(__be32); 2616 } 2617 2618 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2619 { 2620 return (op_encode_hdr_size + op_encode_change_info_maxsz 2621 + op_encode_change_info_maxsz) * sizeof(__be32); 2622 } 2623 2624 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2625 struct nfsd4_op *op) 2626 { 2627 return (op_encode_hdr_size 2628 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2629 } 2630 2631 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2632 { 2633 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2634 * sizeof(__be32); 2635 } 2636 2637 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2638 { 2639 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2640 } 2641 2642 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2643 { 2644 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2645 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2646 } 2647 2648 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2649 { 2650 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2651 sizeof(__be32); 2652 } 2653 2654 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2655 { 2656 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2657 } 2658 2659 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2660 { 2661 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2662 1 + 1 + /* eir_flags, spr_how */\ 2663 4 + /* spo_must_enforce & _allow with bitmap */\ 2664 2 + /*eir_server_owner.so_minor_id */\ 2665 /* eir_server_owner.so_major_id<> */\ 2666 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2667 /* eir_server_scope<> */\ 2668 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2669 1 + /* eir_server_impl_id array length */\ 2670 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2671 } 2672 2673 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2674 { 2675 return (op_encode_hdr_size + \ 2676 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2677 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2678 } 2679 2680 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2681 { 2682 return (op_encode_hdr_size + \ 2683 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2684 2 + /* csr_sequence, csr_flags */\ 2685 op_encode_channel_attrs_maxsz + \ 2686 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2687 } 2688 2689 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2690 { 2691 return (op_encode_hdr_size + 2692 1 /* wr_callback */ + 2693 op_encode_stateid_maxsz /* wr_callback */ + 2694 2 /* wr_count */ + 2695 1 /* wr_committed */ + 2696 op_encode_verifier_maxsz + 2697 1 /* cr_consecutive */ + 2698 1 /* cr_synchronous */) * sizeof(__be32); 2699 } 2700 2701 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2702 struct nfsd4_op *op) 2703 { 2704 return (op_encode_hdr_size + 2705 2 /* osr_count */ + 2706 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2707 } 2708 2709 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2710 struct nfsd4_op *op) 2711 { 2712 return (op_encode_hdr_size + 2713 3 /* cnr_lease_time */ + 2714 1 /* We support one cnr_source_server */ + 2715 1 /* cnr_stateid seq */ + 2716 op_encode_stateid_maxsz /* cnr_stateid */ + 2717 1 /* num cnr_source_server*/ + 2718 1 /* nl4_type */ + 2719 1 /* nl4 size */ + 2720 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2721 * sizeof(__be32); 2722 } 2723 2724 #ifdef CONFIG_NFSD_PNFS 2725 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2726 { 2727 u32 maxcount = 0, rlen = 0; 2728 2729 maxcount = svc_max_payload(rqstp); 2730 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2731 2732 return (op_encode_hdr_size + 2733 1 /* gd_layout_type*/ + 2734 XDR_QUADLEN(rlen) + 2735 2 /* gd_notify_types */) * sizeof(__be32); 2736 } 2737 2738 /* 2739 * At this stage we don't really know what layout driver will handle the request, 2740 * so we need to define an arbitrary upper bound here. 2741 */ 2742 #define MAX_LAYOUT_SIZE 128 2743 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2744 { 2745 return (op_encode_hdr_size + 2746 1 /* logr_return_on_close */ + 2747 op_encode_stateid_maxsz + 2748 1 /* nr of layouts */ + 2749 MAX_LAYOUT_SIZE) * sizeof(__be32); 2750 } 2751 2752 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2753 { 2754 return (op_encode_hdr_size + 2755 1 /* locr_newsize */ + 2756 2 /* ns_size */) * sizeof(__be32); 2757 } 2758 2759 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2760 { 2761 return (op_encode_hdr_size + 2762 1 /* lrs_stateid */ + 2763 op_encode_stateid_maxsz) * sizeof(__be32); 2764 } 2765 #endif /* CONFIG_NFSD_PNFS */ 2766 2767 2768 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2769 { 2770 return (op_encode_hdr_size + 3) * sizeof(__be32); 2771 } 2772 2773 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, 2774 struct nfsd4_op *op) 2775 { 2776 u32 maxcount, rlen; 2777 2778 maxcount = svc_max_payload(rqstp); 2779 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); 2780 2781 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2782 } 2783 2784 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp, 2785 struct nfsd4_op *op) 2786 { 2787 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2788 * sizeof(__be32); 2789 } 2790 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp, 2791 struct nfsd4_op *op) 2792 { 2793 u32 maxcount, rlen; 2794 2795 maxcount = svc_max_payload(rqstp); 2796 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); 2797 2798 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2799 } 2800 2801 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, 2802 struct nfsd4_op *op) 2803 { 2804 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2805 * sizeof(__be32); 2806 } 2807 2808 2809 static const struct nfsd4_operation nfsd4_ops[] = { 2810 [OP_ACCESS] = { 2811 .op_func = nfsd4_access, 2812 .op_name = "OP_ACCESS", 2813 .op_rsize_bop = nfsd4_access_rsize, 2814 }, 2815 [OP_CLOSE] = { 2816 .op_func = nfsd4_close, 2817 .op_flags = OP_MODIFIES_SOMETHING, 2818 .op_name = "OP_CLOSE", 2819 .op_rsize_bop = nfsd4_status_stateid_rsize, 2820 .op_get_currentstateid = nfsd4_get_closestateid, 2821 .op_set_currentstateid = nfsd4_set_closestateid, 2822 }, 2823 [OP_COMMIT] = { 2824 .op_func = nfsd4_commit, 2825 .op_flags = OP_MODIFIES_SOMETHING, 2826 .op_name = "OP_COMMIT", 2827 .op_rsize_bop = nfsd4_commit_rsize, 2828 }, 2829 [OP_CREATE] = { 2830 .op_func = nfsd4_create, 2831 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2832 .op_name = "OP_CREATE", 2833 .op_rsize_bop = nfsd4_create_rsize, 2834 }, 2835 [OP_DELEGRETURN] = { 2836 .op_func = nfsd4_delegreturn, 2837 .op_flags = OP_MODIFIES_SOMETHING, 2838 .op_name = "OP_DELEGRETURN", 2839 .op_rsize_bop = nfsd4_only_status_rsize, 2840 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2841 }, 2842 [OP_GETATTR] = { 2843 .op_func = nfsd4_getattr, 2844 .op_flags = ALLOWED_ON_ABSENT_FS, 2845 .op_rsize_bop = nfsd4_getattr_rsize, 2846 .op_name = "OP_GETATTR", 2847 }, 2848 [OP_GETFH] = { 2849 .op_func = nfsd4_getfh, 2850 .op_name = "OP_GETFH", 2851 .op_rsize_bop = nfsd4_getfh_rsize, 2852 }, 2853 [OP_LINK] = { 2854 .op_func = nfsd4_link, 2855 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2856 | OP_CACHEME, 2857 .op_name = "OP_LINK", 2858 .op_rsize_bop = nfsd4_link_rsize, 2859 }, 2860 [OP_LOCK] = { 2861 .op_func = nfsd4_lock, 2862 .op_flags = OP_MODIFIES_SOMETHING | 2863 OP_NONTRIVIAL_ERROR_ENCODE, 2864 .op_name = "OP_LOCK", 2865 .op_rsize_bop = nfsd4_lock_rsize, 2866 .op_set_currentstateid = nfsd4_set_lockstateid, 2867 }, 2868 [OP_LOCKT] = { 2869 .op_func = nfsd4_lockt, 2870 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2871 .op_name = "OP_LOCKT", 2872 .op_rsize_bop = nfsd4_lock_rsize, 2873 }, 2874 [OP_LOCKU] = { 2875 .op_func = nfsd4_locku, 2876 .op_flags = OP_MODIFIES_SOMETHING, 2877 .op_name = "OP_LOCKU", 2878 .op_rsize_bop = nfsd4_status_stateid_rsize, 2879 .op_get_currentstateid = nfsd4_get_lockustateid, 2880 }, 2881 [OP_LOOKUP] = { 2882 .op_func = nfsd4_lookup, 2883 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2884 .op_name = "OP_LOOKUP", 2885 .op_rsize_bop = nfsd4_only_status_rsize, 2886 }, 2887 [OP_LOOKUPP] = { 2888 .op_func = nfsd4_lookupp, 2889 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2890 .op_name = "OP_LOOKUPP", 2891 .op_rsize_bop = nfsd4_only_status_rsize, 2892 }, 2893 [OP_NVERIFY] = { 2894 .op_func = nfsd4_nverify, 2895 .op_name = "OP_NVERIFY", 2896 .op_rsize_bop = nfsd4_only_status_rsize, 2897 }, 2898 [OP_OPEN] = { 2899 .op_func = nfsd4_open, 2900 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2901 .op_name = "OP_OPEN", 2902 .op_rsize_bop = nfsd4_open_rsize, 2903 .op_set_currentstateid = nfsd4_set_openstateid, 2904 }, 2905 [OP_OPEN_CONFIRM] = { 2906 .op_func = nfsd4_open_confirm, 2907 .op_flags = OP_MODIFIES_SOMETHING, 2908 .op_name = "OP_OPEN_CONFIRM", 2909 .op_rsize_bop = nfsd4_status_stateid_rsize, 2910 }, 2911 [OP_OPEN_DOWNGRADE] = { 2912 .op_func = nfsd4_open_downgrade, 2913 .op_flags = OP_MODIFIES_SOMETHING, 2914 .op_name = "OP_OPEN_DOWNGRADE", 2915 .op_rsize_bop = nfsd4_status_stateid_rsize, 2916 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2917 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2918 }, 2919 [OP_PUTFH] = { 2920 .op_func = nfsd4_putfh, 2921 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2922 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2923 .op_name = "OP_PUTFH", 2924 .op_rsize_bop = nfsd4_only_status_rsize, 2925 }, 2926 [OP_PUTPUBFH] = { 2927 .op_func = nfsd4_putrootfh, 2928 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2929 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2930 .op_name = "OP_PUTPUBFH", 2931 .op_rsize_bop = nfsd4_only_status_rsize, 2932 }, 2933 [OP_PUTROOTFH] = { 2934 .op_func = nfsd4_putrootfh, 2935 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2936 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2937 .op_name = "OP_PUTROOTFH", 2938 .op_rsize_bop = nfsd4_only_status_rsize, 2939 }, 2940 [OP_READ] = { 2941 .op_func = nfsd4_read, 2942 .op_release = nfsd4_read_release, 2943 .op_name = "OP_READ", 2944 .op_rsize_bop = nfsd4_read_rsize, 2945 .op_get_currentstateid = nfsd4_get_readstateid, 2946 }, 2947 [OP_READDIR] = { 2948 .op_func = nfsd4_readdir, 2949 .op_name = "OP_READDIR", 2950 .op_rsize_bop = nfsd4_readdir_rsize, 2951 }, 2952 [OP_READLINK] = { 2953 .op_func = nfsd4_readlink, 2954 .op_name = "OP_READLINK", 2955 .op_rsize_bop = nfsd4_readlink_rsize, 2956 }, 2957 [OP_REMOVE] = { 2958 .op_func = nfsd4_remove, 2959 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2960 .op_name = "OP_REMOVE", 2961 .op_rsize_bop = nfsd4_remove_rsize, 2962 }, 2963 [OP_RENAME] = { 2964 .op_func = nfsd4_rename, 2965 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2966 .op_name = "OP_RENAME", 2967 .op_rsize_bop = nfsd4_rename_rsize, 2968 }, 2969 [OP_RENEW] = { 2970 .op_func = nfsd4_renew, 2971 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2972 | OP_MODIFIES_SOMETHING, 2973 .op_name = "OP_RENEW", 2974 .op_rsize_bop = nfsd4_only_status_rsize, 2975 2976 }, 2977 [OP_RESTOREFH] = { 2978 .op_func = nfsd4_restorefh, 2979 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2980 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2981 .op_name = "OP_RESTOREFH", 2982 .op_rsize_bop = nfsd4_only_status_rsize, 2983 }, 2984 [OP_SAVEFH] = { 2985 .op_func = nfsd4_savefh, 2986 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2987 .op_name = "OP_SAVEFH", 2988 .op_rsize_bop = nfsd4_only_status_rsize, 2989 }, 2990 [OP_SECINFO] = { 2991 .op_func = nfsd4_secinfo, 2992 .op_release = nfsd4_secinfo_release, 2993 .op_flags = OP_HANDLES_WRONGSEC, 2994 .op_name = "OP_SECINFO", 2995 .op_rsize_bop = nfsd4_secinfo_rsize, 2996 }, 2997 [OP_SETATTR] = { 2998 .op_func = nfsd4_setattr, 2999 .op_name = "OP_SETATTR", 3000 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3001 | OP_NONTRIVIAL_ERROR_ENCODE, 3002 .op_rsize_bop = nfsd4_setattr_rsize, 3003 .op_get_currentstateid = nfsd4_get_setattrstateid, 3004 }, 3005 [OP_SETCLIENTID] = { 3006 .op_func = nfsd4_setclientid, 3007 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3008 | OP_MODIFIES_SOMETHING | OP_CACHEME 3009 | OP_NONTRIVIAL_ERROR_ENCODE, 3010 .op_name = "OP_SETCLIENTID", 3011 .op_rsize_bop = nfsd4_setclientid_rsize, 3012 }, 3013 [OP_SETCLIENTID_CONFIRM] = { 3014 .op_func = nfsd4_setclientid_confirm, 3015 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3016 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3017 .op_name = "OP_SETCLIENTID_CONFIRM", 3018 .op_rsize_bop = nfsd4_only_status_rsize, 3019 }, 3020 [OP_VERIFY] = { 3021 .op_func = nfsd4_verify, 3022 .op_name = "OP_VERIFY", 3023 .op_rsize_bop = nfsd4_only_status_rsize, 3024 }, 3025 [OP_WRITE] = { 3026 .op_func = nfsd4_write, 3027 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3028 .op_name = "OP_WRITE", 3029 .op_rsize_bop = nfsd4_write_rsize, 3030 .op_get_currentstateid = nfsd4_get_writestateid, 3031 }, 3032 [OP_RELEASE_LOCKOWNER] = { 3033 .op_func = nfsd4_release_lockowner, 3034 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3035 | OP_MODIFIES_SOMETHING, 3036 .op_name = "OP_RELEASE_LOCKOWNER", 3037 .op_rsize_bop = nfsd4_only_status_rsize, 3038 }, 3039 3040 /* NFSv4.1 operations */ 3041 [OP_EXCHANGE_ID] = { 3042 .op_func = nfsd4_exchange_id, 3043 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3044 | OP_MODIFIES_SOMETHING, 3045 .op_name = "OP_EXCHANGE_ID", 3046 .op_rsize_bop = nfsd4_exchange_id_rsize, 3047 }, 3048 [OP_BACKCHANNEL_CTL] = { 3049 .op_func = nfsd4_backchannel_ctl, 3050 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3051 .op_name = "OP_BACKCHANNEL_CTL", 3052 .op_rsize_bop = nfsd4_only_status_rsize, 3053 }, 3054 [OP_BIND_CONN_TO_SESSION] = { 3055 .op_func = nfsd4_bind_conn_to_session, 3056 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3057 | OP_MODIFIES_SOMETHING, 3058 .op_name = "OP_BIND_CONN_TO_SESSION", 3059 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3060 }, 3061 [OP_CREATE_SESSION] = { 3062 .op_func = nfsd4_create_session, 3063 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3064 | OP_MODIFIES_SOMETHING, 3065 .op_name = "OP_CREATE_SESSION", 3066 .op_rsize_bop = nfsd4_create_session_rsize, 3067 }, 3068 [OP_DESTROY_SESSION] = { 3069 .op_func = nfsd4_destroy_session, 3070 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3071 | OP_MODIFIES_SOMETHING, 3072 .op_name = "OP_DESTROY_SESSION", 3073 .op_rsize_bop = nfsd4_only_status_rsize, 3074 }, 3075 [OP_SEQUENCE] = { 3076 .op_func = nfsd4_sequence, 3077 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3078 .op_name = "OP_SEQUENCE", 3079 .op_rsize_bop = nfsd4_sequence_rsize, 3080 }, 3081 [OP_DESTROY_CLIENTID] = { 3082 .op_func = nfsd4_destroy_clientid, 3083 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3084 | OP_MODIFIES_SOMETHING, 3085 .op_name = "OP_DESTROY_CLIENTID", 3086 .op_rsize_bop = nfsd4_only_status_rsize, 3087 }, 3088 [OP_RECLAIM_COMPLETE] = { 3089 .op_func = nfsd4_reclaim_complete, 3090 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3091 .op_name = "OP_RECLAIM_COMPLETE", 3092 .op_rsize_bop = nfsd4_only_status_rsize, 3093 }, 3094 [OP_SECINFO_NO_NAME] = { 3095 .op_func = nfsd4_secinfo_no_name, 3096 .op_release = nfsd4_secinfo_no_name_release, 3097 .op_flags = OP_HANDLES_WRONGSEC, 3098 .op_name = "OP_SECINFO_NO_NAME", 3099 .op_rsize_bop = nfsd4_secinfo_rsize, 3100 }, 3101 [OP_TEST_STATEID] = { 3102 .op_func = nfsd4_test_stateid, 3103 .op_flags = ALLOWED_WITHOUT_FH, 3104 .op_name = "OP_TEST_STATEID", 3105 .op_rsize_bop = nfsd4_test_stateid_rsize, 3106 }, 3107 [OP_FREE_STATEID] = { 3108 .op_func = nfsd4_free_stateid, 3109 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3110 .op_name = "OP_FREE_STATEID", 3111 .op_get_currentstateid = nfsd4_get_freestateid, 3112 .op_rsize_bop = nfsd4_only_status_rsize, 3113 }, 3114 #ifdef CONFIG_NFSD_PNFS 3115 [OP_GETDEVICEINFO] = { 3116 .op_func = nfsd4_getdeviceinfo, 3117 .op_release = nfsd4_getdeviceinfo_release, 3118 .op_flags = ALLOWED_WITHOUT_FH, 3119 .op_name = "OP_GETDEVICEINFO", 3120 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3121 }, 3122 [OP_LAYOUTGET] = { 3123 .op_func = nfsd4_layoutget, 3124 .op_release = nfsd4_layoutget_release, 3125 .op_flags = OP_MODIFIES_SOMETHING, 3126 .op_name = "OP_LAYOUTGET", 3127 .op_rsize_bop = nfsd4_layoutget_rsize, 3128 }, 3129 [OP_LAYOUTCOMMIT] = { 3130 .op_func = nfsd4_layoutcommit, 3131 .op_flags = OP_MODIFIES_SOMETHING, 3132 .op_name = "OP_LAYOUTCOMMIT", 3133 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3134 }, 3135 [OP_LAYOUTRETURN] = { 3136 .op_func = nfsd4_layoutreturn, 3137 .op_flags = OP_MODIFIES_SOMETHING, 3138 .op_name = "OP_LAYOUTRETURN", 3139 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3140 }, 3141 #endif /* CONFIG_NFSD_PNFS */ 3142 3143 /* NFSv4.2 operations */ 3144 [OP_ALLOCATE] = { 3145 .op_func = nfsd4_allocate, 3146 .op_flags = OP_MODIFIES_SOMETHING, 3147 .op_name = "OP_ALLOCATE", 3148 .op_rsize_bop = nfsd4_only_status_rsize, 3149 }, 3150 [OP_DEALLOCATE] = { 3151 .op_func = nfsd4_deallocate, 3152 .op_flags = OP_MODIFIES_SOMETHING, 3153 .op_name = "OP_DEALLOCATE", 3154 .op_rsize_bop = nfsd4_only_status_rsize, 3155 }, 3156 [OP_CLONE] = { 3157 .op_func = nfsd4_clone, 3158 .op_flags = OP_MODIFIES_SOMETHING, 3159 .op_name = "OP_CLONE", 3160 .op_rsize_bop = nfsd4_only_status_rsize, 3161 }, 3162 [OP_COPY] = { 3163 .op_func = nfsd4_copy, 3164 .op_flags = OP_MODIFIES_SOMETHING, 3165 .op_name = "OP_COPY", 3166 .op_rsize_bop = nfsd4_copy_rsize, 3167 }, 3168 [OP_READ_PLUS] = { 3169 .op_func = nfsd4_read, 3170 .op_release = nfsd4_read_release, 3171 .op_name = "OP_READ_PLUS", 3172 .op_rsize_bop = nfsd4_read_plus_rsize, 3173 .op_get_currentstateid = nfsd4_get_readstateid, 3174 }, 3175 [OP_SEEK] = { 3176 .op_func = nfsd4_seek, 3177 .op_name = "OP_SEEK", 3178 .op_rsize_bop = nfsd4_seek_rsize, 3179 }, 3180 [OP_OFFLOAD_STATUS] = { 3181 .op_func = nfsd4_offload_status, 3182 .op_name = "OP_OFFLOAD_STATUS", 3183 .op_rsize_bop = nfsd4_offload_status_rsize, 3184 }, 3185 [OP_OFFLOAD_CANCEL] = { 3186 .op_func = nfsd4_offload_cancel, 3187 .op_flags = OP_MODIFIES_SOMETHING, 3188 .op_name = "OP_OFFLOAD_CANCEL", 3189 .op_rsize_bop = nfsd4_only_status_rsize, 3190 }, 3191 [OP_COPY_NOTIFY] = { 3192 .op_func = nfsd4_copy_notify, 3193 .op_flags = OP_MODIFIES_SOMETHING, 3194 .op_name = "OP_COPY_NOTIFY", 3195 .op_rsize_bop = nfsd4_copy_notify_rsize, 3196 }, 3197 [OP_GETXATTR] = { 3198 .op_func = nfsd4_getxattr, 3199 .op_name = "OP_GETXATTR", 3200 .op_rsize_bop = nfsd4_getxattr_rsize, 3201 }, 3202 [OP_SETXATTR] = { 3203 .op_func = nfsd4_setxattr, 3204 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3205 .op_name = "OP_SETXATTR", 3206 .op_rsize_bop = nfsd4_setxattr_rsize, 3207 }, 3208 [OP_LISTXATTRS] = { 3209 .op_func = nfsd4_listxattrs, 3210 .op_name = "OP_LISTXATTRS", 3211 .op_rsize_bop = nfsd4_listxattrs_rsize, 3212 }, 3213 [OP_REMOVEXATTR] = { 3214 .op_func = nfsd4_removexattr, 3215 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3216 .op_name = "OP_REMOVEXATTR", 3217 .op_rsize_bop = nfsd4_removexattr_rsize, 3218 }, 3219 }; 3220 3221 /** 3222 * nfsd4_spo_must_allow - Determine if the compound op contains an 3223 * operation that is allowed to be sent with machine credentials 3224 * 3225 * @rqstp: a pointer to the struct svc_rqst 3226 * 3227 * Checks to see if the compound contains a spo_must_allow op 3228 * and confirms that it was sent with the proper machine creds. 3229 */ 3230 3231 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3232 { 3233 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3234 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3235 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3236 struct nfsd4_compound_state *cstate = &resp->cstate; 3237 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3238 u32 opiter; 3239 3240 if (!cstate->minorversion) 3241 return false; 3242 3243 if (cstate->spo_must_allowed) 3244 return true; 3245 3246 opiter = resp->opcnt; 3247 while (opiter < argp->opcnt) { 3248 this = &argp->ops[opiter++]; 3249 if (test_bit(this->opnum, allow->u.longs) && 3250 cstate->clp->cl_mach_cred && 3251 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3252 cstate->spo_must_allowed = true; 3253 return true; 3254 } 3255 } 3256 cstate->spo_must_allowed = false; 3257 return false; 3258 } 3259 3260 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3261 { 3262 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3263 return op_encode_hdr_size * sizeof(__be32); 3264 3265 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3266 return OPDESC(op)->op_rsize_bop(rqstp, op); 3267 } 3268 3269 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3270 { 3271 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3272 pr_err("unable to encode reply to nonidempotent op %u (%s)\n", 3273 op->opnum, nfsd4_op_name(op->opnum)); 3274 WARN_ON_ONCE(1); 3275 } 3276 } 3277 3278 static const char *nfsd4_op_name(unsigned opnum) 3279 { 3280 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3281 return nfsd4_ops[opnum].op_name; 3282 return "unknown_operation"; 3283 } 3284 3285 static const struct svc_procedure nfsd_procedures4[2] = { 3286 [NFSPROC4_NULL] = { 3287 .pc_func = nfsd4_proc_null, 3288 .pc_decode = nfssvc_decode_voidarg, 3289 .pc_encode = nfssvc_encode_voidres, 3290 .pc_argsize = sizeof(struct nfsd_voidargs), 3291 .pc_ressize = sizeof(struct nfsd_voidres), 3292 .pc_cachetype = RC_NOCACHE, 3293 .pc_xdrressize = 1, 3294 .pc_name = "NULL", 3295 }, 3296 [NFSPROC4_COMPOUND] = { 3297 .pc_func = nfsd4_proc_compound, 3298 .pc_decode = nfs4svc_decode_compoundargs, 3299 .pc_encode = nfs4svc_encode_compoundres, 3300 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3301 .pc_ressize = sizeof(struct nfsd4_compoundres), 3302 .pc_release = nfsd4_release_compoundargs, 3303 .pc_cachetype = RC_NOCACHE, 3304 .pc_xdrressize = NFSD_BUFSIZE/4, 3305 .pc_name = "COMPOUND", 3306 }, 3307 }; 3308 3309 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 3310 const struct svc_version nfsd_version4 = { 3311 .vs_vers = 4, 3312 .vs_nproc = 2, 3313 .vs_proc = nfsd_procedures4, 3314 .vs_count = nfsd_count3, 3315 .vs_dispatch = nfsd_dispatch, 3316 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3317 .vs_rpcb_optnl = true, 3318 .vs_need_cong_ctrl = true, 3319 }; 3320