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/file.h> 36#include <linux/falloc.h> 37#include <linux/slab.h> 38 39#include "idmap.h" 40#include "cache.h" 41#include "xdr4.h" 42#include "vfs.h" 43#include "current_stateid.h" 44#include "netns.h" 45#include "acl.h" 46#include "pnfs.h" 47#include "trace.h" 48 49#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 50#include <linux/security.h> 51 52static inline void 53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 54{ 55 struct inode *inode = d_inode(resfh->fh_dentry); 56 int status; 57 58 mutex_lock(&inode->i_mutex); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 mutex_unlock(&inode->i_mutex); 62 63 if (status) 64 /* 65 * XXX: We should really fail the whole open, but we may 66 * already have created a new file, so it may be too 67 * late. For now this seems the least of evils: 68 */ 69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 70 71 return; 72} 73#else 74static inline void 75nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 76{ } 77#endif 78 79#define NFSDDBG_FACILITY NFSDDBG_PROC 80 81static u32 nfsd_attrmask[] = { 82 NFSD_WRITEABLE_ATTRS_WORD0, 83 NFSD_WRITEABLE_ATTRS_WORD1, 84 NFSD_WRITEABLE_ATTRS_WORD2 85}; 86 87static u32 nfsd41_ex_attrmask[] = { 88 NFSD_SUPPATTR_EXCLCREAT_WORD0, 89 NFSD_SUPPATTR_EXCLCREAT_WORD1, 90 NFSD_SUPPATTR_EXCLCREAT_WORD2 91}; 92 93static __be32 94check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 95 u32 *bmval, u32 *writable) 96{ 97 struct dentry *dentry = cstate->current_fh.fh_dentry; 98 99 /* 100 * Check about attributes are supported by the NFSv4 server or not. 101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 102 */ 103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 106 return nfserr_attrnotsupp; 107 108 /* 109 * Check FATTR4_WORD0_ACL can be supported 110 * in current environment or not. 111 */ 112 if (bmval[0] & FATTR4_WORD0_ACL) { 113 if (!IS_POSIXACL(d_inode(dentry))) 114 return nfserr_attrnotsupp; 115 } 116 117 /* 118 * According to spec, read-only attributes return ERR_INVAL. 119 */ 120 if (writable) { 121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 122 (bmval[2] & ~writable[2])) 123 return nfserr_inval; 124 } 125 126 return nfs_ok; 127} 128 129static __be32 130nfsd4_check_open_attributes(struct svc_rqst *rqstp, 131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 132{ 133 __be32 status = nfs_ok; 134 135 if (open->op_create == NFS4_OPEN_CREATE) { 136 if (open->op_createmode == NFS4_CREATE_UNCHECKED 137 || open->op_createmode == NFS4_CREATE_GUARDED) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd_attrmask); 140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 141 status = check_attr_support(rqstp, cstate, 142 open->op_bmval, nfsd41_ex_attrmask); 143 } 144 145 return status; 146} 147 148static int 149is_create_with_attrs(struct nfsd4_open *open) 150{ 151 return open->op_create == NFS4_OPEN_CREATE 152 && (open->op_createmode == NFS4_CREATE_UNCHECKED 153 || open->op_createmode == NFS4_CREATE_GUARDED 154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 155} 156 157/* 158 * if error occurs when setting the acl, just clear the acl bit 159 * in the returned attr bitmap. 160 */ 161static void 162do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 163 struct nfs4_acl *acl, u32 *bmval) 164{ 165 __be32 status; 166 167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 168 if (status) 169 /* 170 * We should probably fail the whole open at this point, 171 * but we've already created the file, so it's too late; 172 * So this seems the least of evils: 173 */ 174 bmval[0] &= ~FATTR4_WORD0_ACL; 175} 176 177static inline void 178fh_dup2(struct svc_fh *dst, struct svc_fh *src) 179{ 180 fh_put(dst); 181 dget(src->fh_dentry); 182 if (src->fh_export) 183 exp_get(src->fh_export); 184 *dst = *src; 185} 186 187static __be32 188do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 189{ 190 __be32 status; 191 192 if (open->op_truncate && 193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 194 return nfserr_inval; 195 196 accmode |= NFSD_MAY_READ_IF_EXEC; 197 198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 199 accmode |= NFSD_MAY_READ; 200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 202 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 203 accmode |= NFSD_MAY_WRITE; 204 205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 206 207 return status; 208} 209 210static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 211{ 212 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 213 214 if (S_ISREG(mode)) 215 return nfs_ok; 216 if (S_ISDIR(mode)) 217 return nfserr_isdir; 218 /* 219 * Using err_symlink as our catch-all case may look odd; but 220 * there's no other obvious error for this case in 4.0, and we 221 * happen to know that it will cause the linux v4 client to do 222 * the right thing on attempts to open something other than a 223 * regular file. 224 */ 225 return nfserr_symlink; 226} 227 228static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 229{ 230 if (nfsd4_has_session(cstate)) 231 return; 232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 233 &resfh->fh_handle); 234} 235 236static __be32 237do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 238{ 239 struct svc_fh *current_fh = &cstate->current_fh; 240 int accmode; 241 __be32 status; 242 243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 244 if (!*resfh) 245 return nfserr_jukebox; 246 fh_init(*resfh, NFS4_FHSIZE); 247 open->op_truncate = 0; 248 249 if (open->op_create) { 250 /* FIXME: check session persistence and pnfs flags. 251 * The nfsv4.1 spec requires the following semantics: 252 * 253 * Persistent | pNFS | Server REQUIRED | Client Allowed 254 * Reply Cache | server | | 255 * -------------+--------+-----------------+-------------------- 256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 257 * | | | (SHOULD) 258 * | | and EXCLUSIVE4 | or EXCLUSIVE4 259 * | | | (SHOULD NOT) 260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 261 * yes | no | GUARDED4 | GUARDED4 262 * yes | yes | GUARDED4 | GUARDED4 263 */ 264 265 /* 266 * Note: create modes (UNCHECKED,GUARDED...) are the same 267 * in NFSv4 as in v3 except EXCLUSIVE4_1. 268 */ 269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 270 open->op_fname.len, &open->op_iattr, 271 *resfh, open->op_createmode, 272 (u32 *)open->op_verf.data, 273 &open->op_truncate, &open->op_created); 274 275 if (!status && open->op_label.len) 276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 277 278 /* 279 * Following rfc 3530 14.2.16, use the returned bitmask 280 * to indicate which attributes we used to store the 281 * verifier: 282 */ 283 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 284 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 285 FATTR4_WORD1_TIME_MODIFY); 286 } else 287 /* 288 * Note this may exit with the parent still locked. 289 * We will hold the lock until nfsd4_open's final 290 * lookup, to prevent renames or unlinks until we've had 291 * a chance to an acquire a delegation if appropriate. 292 */ 293 status = nfsd_lookup(rqstp, current_fh, 294 open->op_fname.data, open->op_fname.len, *resfh); 295 if (status) 296 goto out; 297 status = nfsd_check_obj_isreg(*resfh); 298 if (status) 299 goto out; 300 301 if (is_create_with_attrs(open) && open->op_acl != NULL) 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 303 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 305 accmode = NFSD_MAY_NOP; 306 if (open->op_created || 307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 308 accmode |= NFSD_MAY_OWNER_OVERRIDE; 309 status = do_open_permission(rqstp, *resfh, open, accmode); 310 set_change_info(&open->op_cinfo, current_fh); 311out: 312 return status; 313} 314 315static __be32 316do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 317{ 318 struct svc_fh *current_fh = &cstate->current_fh; 319 __be32 status; 320 int accmode = 0; 321 322 /* We don't know the target directory, and therefore can not 323 * set the change info 324 */ 325 326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 327 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 329 330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 331 (open->op_iattr.ia_size == 0); 332 /* 333 * In the delegation case, the client is telling us about an 334 * open that it *already* performed locally, some time ago. We 335 * should let it succeed now if possible. 336 * 337 * In the case of a CLAIM_FH open, on the other hand, the client 338 * may be counting on us to enforce permissions (the Linux 4.1 339 * client uses this for normal opens, for example). 340 */ 341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 342 accmode = NFSD_MAY_OWNER_OVERRIDE; 343 344 status = do_open_permission(rqstp, current_fh, open, accmode); 345 346 return status; 347} 348 349static void 350copy_clientid(clientid_t *clid, struct nfsd4_session *session) 351{ 352 struct nfsd4_sessionid *sid = 353 (struct nfsd4_sessionid *)session->se_sessionid.data; 354 355 clid->cl_boot = sid->clientid.cl_boot; 356 clid->cl_id = sid->clientid.cl_id; 357} 358 359static __be32 360nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 361 struct nfsd4_open *open) 362{ 363 __be32 status; 364 struct svc_fh *resfh = NULL; 365 struct nfsd4_compoundres *resp; 366 struct net *net = SVC_NET(rqstp); 367 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 368 369 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 370 (int)open->op_fname.len, open->op_fname.data, 371 open->op_openowner); 372 373 /* This check required by spec. */ 374 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 375 return nfserr_inval; 376 377 open->op_created = 0; 378 /* 379 * RFC5661 18.51.3 380 * Before RECLAIM_COMPLETE done, server should deny new lock 381 */ 382 if (nfsd4_has_session(cstate) && 383 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 384 &cstate->session->se_client->cl_flags) && 385 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 386 return nfserr_grace; 387 388 if (nfsd4_has_session(cstate)) 389 copy_clientid(&open->op_clientid, cstate->session); 390 391 /* check seqid for replay. set nfs4_owner */ 392 resp = rqstp->rq_resp; 393 status = nfsd4_process_open1(&resp->cstate, open, nn); 394 if (status == nfserr_replay_me) { 395 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 396 fh_put(&cstate->current_fh); 397 fh_copy_shallow(&cstate->current_fh.fh_handle, 398 &rp->rp_openfh); 399 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 400 if (status) 401 dprintk("nfsd4_open: replay failed" 402 " restoring previous filehandle\n"); 403 else 404 status = nfserr_replay_me; 405 } 406 if (status) 407 goto out; 408 if (open->op_xdr_error) { 409 status = open->op_xdr_error; 410 goto out; 411 } 412 413 status = nfsd4_check_open_attributes(rqstp, cstate, open); 414 if (status) 415 goto out; 416 417 /* Openowner is now set, so sequence id will get bumped. Now we need 418 * these checks before we do any creates: */ 419 status = nfserr_grace; 420 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 status = nfserr_no_grace; 423 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 424 goto out; 425 426 switch (open->op_claim_type) { 427 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 428 case NFS4_OPEN_CLAIM_NULL: 429 status = do_open_lookup(rqstp, cstate, open, &resfh); 430 if (status) 431 goto out; 432 break; 433 case NFS4_OPEN_CLAIM_PREVIOUS: 434 status = nfs4_check_open_reclaim(&open->op_clientid, 435 cstate, nn); 436 if (status) 437 goto out; 438 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 439 case NFS4_OPEN_CLAIM_FH: 440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 441 status = do_open_fhandle(rqstp, cstate, open); 442 if (status) 443 goto out; 444 resfh = &cstate->current_fh; 445 break; 446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 447 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 448 dprintk("NFSD: unsupported OPEN claim type %d\n", 449 open->op_claim_type); 450 status = nfserr_notsupp; 451 goto out; 452 default: 453 dprintk("NFSD: Invalid OPEN claim type %d\n", 454 open->op_claim_type); 455 status = nfserr_inval; 456 goto out; 457 } 458 /* 459 * nfsd4_process_open2() does the actual opening of the file. If 460 * successful, it (1) truncates the file if open->op_truncate was 461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 462 */ 463 status = nfsd4_process_open2(rqstp, resfh, open); 464 WARN(status && open->op_created, 465 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 466 be32_to_cpu(status)); 467out: 468 if (resfh && resfh != &cstate->current_fh) { 469 fh_dup2(&cstate->current_fh, resfh); 470 fh_put(resfh); 471 kfree(resfh); 472 } 473 nfsd4_cleanup_open_state(cstate, open); 474 nfsd4_bump_seqid(cstate, status); 475 return status; 476} 477 478/* 479 * OPEN is the only seqid-mutating operation whose decoding can fail 480 * with a seqid-mutating error (specifically, decoding of user names in 481 * the attributes). Therefore we have to do some processing to look up 482 * the stateowner so that we can bump the seqid. 483 */ 484static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 485{ 486 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 487 488 if (!seqid_mutating_err(ntohl(op->status))) 489 return op->status; 490 if (nfsd4_has_session(cstate)) 491 return op->status; 492 open->op_xdr_error = op->status; 493 return nfsd4_open(rqstp, cstate, open); 494} 495 496/* 497 * filehandle-manipulating ops. 498 */ 499static __be32 500nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 501 struct svc_fh **getfh) 502{ 503 if (!cstate->current_fh.fh_dentry) 504 return nfserr_nofilehandle; 505 506 *getfh = &cstate->current_fh; 507 return nfs_ok; 508} 509 510static __be32 511nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 512 struct nfsd4_putfh *putfh) 513{ 514 fh_put(&cstate->current_fh); 515 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 516 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 517 putfh->pf_fhlen); 518 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 519} 520 521static __be32 522nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 523 void *arg) 524{ 525 __be32 status; 526 527 fh_put(&cstate->current_fh); 528 status = exp_pseudoroot(rqstp, &cstate->current_fh); 529 return status; 530} 531 532static __be32 533nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 534 void *arg) 535{ 536 if (!cstate->save_fh.fh_dentry) 537 return nfserr_restorefh; 538 539 fh_dup2(&cstate->current_fh, &cstate->save_fh); 540 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 541 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 542 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 543 } 544 return nfs_ok; 545} 546 547static __be32 548nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 549 void *arg) 550{ 551 if (!cstate->current_fh.fh_dentry) 552 return nfserr_nofilehandle; 553 554 fh_dup2(&cstate->save_fh, &cstate->current_fh); 555 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 557 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 558 } 559 return nfs_ok; 560} 561 562/* 563 * misc nfsv4 ops 564 */ 565static __be32 566nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 567 struct nfsd4_access *access) 568{ 569 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 570 return nfserr_inval; 571 572 access->ac_resp_access = access->ac_req_access; 573 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 574 &access->ac_supported); 575} 576 577static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 578{ 579 __be32 verf[2]; 580 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 581 582 /* 583 * This is opaque to client, so no need to byte-swap. Use 584 * __force to keep sparse happy 585 */ 586 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 587 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 588 memcpy(verifier->data, verf, sizeof(verifier->data)); 589} 590 591static __be32 592nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 struct nfsd4_commit *commit) 594{ 595 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 596 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 597 commit->co_count); 598} 599 600static __be32 601nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 602 struct nfsd4_create *create) 603{ 604 struct svc_fh resfh; 605 __be32 status; 606 dev_t rdev; 607 608 fh_init(&resfh, NFS4_FHSIZE); 609 610 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 611 NFSD_MAY_CREATE); 612 if (status) 613 return status; 614 615 status = check_attr_support(rqstp, cstate, create->cr_bmval, 616 nfsd_attrmask); 617 if (status) 618 return status; 619 620 switch (create->cr_type) { 621 case NF4LNK: 622 status = nfsd_symlink(rqstp, &cstate->current_fh, 623 create->cr_name, create->cr_namelen, 624 create->cr_data, &resfh); 625 break; 626 627 case NF4BLK: 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 629 if (MAJOR(rdev) != create->cr_specdata1 || 630 MINOR(rdev) != create->cr_specdata2) 631 return nfserr_inval; 632 status = nfsd_create(rqstp, &cstate->current_fh, 633 create->cr_name, create->cr_namelen, 634 &create->cr_iattr, S_IFBLK, rdev, &resfh); 635 break; 636 637 case NF4CHR: 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 639 if (MAJOR(rdev) != create->cr_specdata1 || 640 MINOR(rdev) != create->cr_specdata2) 641 return nfserr_inval; 642 status = nfsd_create(rqstp, &cstate->current_fh, 643 create->cr_name, create->cr_namelen, 644 &create->cr_iattr,S_IFCHR, rdev, &resfh); 645 break; 646 647 case NF4SOCK: 648 status = nfsd_create(rqstp, &cstate->current_fh, 649 create->cr_name, create->cr_namelen, 650 &create->cr_iattr, S_IFSOCK, 0, &resfh); 651 break; 652 653 case NF4FIFO: 654 status = nfsd_create(rqstp, &cstate->current_fh, 655 create->cr_name, create->cr_namelen, 656 &create->cr_iattr, S_IFIFO, 0, &resfh); 657 break; 658 659 case NF4DIR: 660 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 661 status = nfsd_create(rqstp, &cstate->current_fh, 662 create->cr_name, create->cr_namelen, 663 &create->cr_iattr, S_IFDIR, 0, &resfh); 664 break; 665 666 default: 667 status = nfserr_badtype; 668 } 669 670 if (status) 671 goto out; 672 673 if (create->cr_label.len) 674 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 675 676 if (create->cr_acl != NULL) 677 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 678 create->cr_bmval); 679 680 fh_unlock(&cstate->current_fh); 681 set_change_info(&create->cr_cinfo, &cstate->current_fh); 682 fh_dup2(&cstate->current_fh, &resfh); 683out: 684 fh_put(&resfh); 685 return status; 686} 687 688static __be32 689nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 690 struct nfsd4_getattr *getattr) 691{ 692 __be32 status; 693 694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 695 if (status) 696 return status; 697 698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 699 return nfserr_inval; 700 701 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 702 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 703 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 704 705 getattr->ga_fhp = &cstate->current_fh; 706 return nfs_ok; 707} 708 709static __be32 710nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 711 struct nfsd4_link *link) 712{ 713 __be32 status = nfserr_nofilehandle; 714 715 if (!cstate->save_fh.fh_dentry) 716 return status; 717 status = nfsd_link(rqstp, &cstate->current_fh, 718 link->li_name, link->li_namelen, &cstate->save_fh); 719 if (!status) 720 set_change_info(&link->li_cinfo, &cstate->current_fh); 721 return status; 722} 723 724static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 725{ 726 struct svc_fh tmp_fh; 727 __be32 ret; 728 729 fh_init(&tmp_fh, NFS4_FHSIZE); 730 ret = exp_pseudoroot(rqstp, &tmp_fh); 731 if (ret) 732 return ret; 733 if (tmp_fh.fh_dentry == fh->fh_dentry) { 734 fh_put(&tmp_fh); 735 return nfserr_noent; 736 } 737 fh_put(&tmp_fh); 738 return nfsd_lookup(rqstp, fh, "..", 2, fh); 739} 740 741static __be32 742nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 void *arg) 744{ 745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 746} 747 748static __be32 749nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 750 struct nfsd4_lookup *lookup) 751{ 752 return nfsd_lookup(rqstp, &cstate->current_fh, 753 lookup->lo_name, lookup->lo_len, 754 &cstate->current_fh); 755} 756 757static __be32 758nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 759 struct nfsd4_read *read) 760{ 761 __be32 status; 762 763 /* no need to check permission - this will be done in nfsd_read() */ 764 765 read->rd_filp = NULL; 766 if (read->rd_offset >= OFFSET_MAX) 767 return nfserr_inval; 768 769 /* 770 * If we do a zero copy read, then a client will see read data 771 * that reflects the state of the file *after* performing the 772 * following compound. 773 * 774 * To ensure proper ordering, we therefore turn off zero copy if 775 * the client wants us to do more in this compound: 776 */ 777 if (!nfsd4_last_compound_op(rqstp)) 778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 779 780 /* check stateid */ 781 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 782 cstate, &read->rd_stateid, 783 RD_STATE, &read->rd_filp))) { 784 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 785 goto out; 786 } 787 status = nfs_ok; 788out: 789 read->rd_rqstp = rqstp; 790 read->rd_fhp = &cstate->current_fh; 791 return status; 792} 793 794static __be32 795nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 796 struct nfsd4_readdir *readdir) 797{ 798 u64 cookie = readdir->rd_cookie; 799 static const nfs4_verifier zeroverf; 800 801 /* no need to check permission - this will be done in nfsd_readdir() */ 802 803 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 804 return nfserr_inval; 805 806 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 807 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 808 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 809 810 if ((cookie == 1) || (cookie == 2) || 811 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 812 return nfserr_bad_cookie; 813 814 readdir->rd_rqstp = rqstp; 815 readdir->rd_fhp = &cstate->current_fh; 816 return nfs_ok; 817} 818 819static __be32 820nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 821 struct nfsd4_readlink *readlink) 822{ 823 readlink->rl_rqstp = rqstp; 824 readlink->rl_fhp = &cstate->current_fh; 825 return nfs_ok; 826} 827 828static __be32 829nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 830 struct nfsd4_remove *remove) 831{ 832 __be32 status; 833 834 if (locks_in_grace(SVC_NET(rqstp))) 835 return nfserr_grace; 836 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 837 remove->rm_name, remove->rm_namelen); 838 if (!status) { 839 fh_unlock(&cstate->current_fh); 840 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 841 } 842 return status; 843} 844 845static __be32 846nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 847 struct nfsd4_rename *rename) 848{ 849 __be32 status = nfserr_nofilehandle; 850 851 if (!cstate->save_fh.fh_dentry) 852 return status; 853 if (locks_in_grace(SVC_NET(rqstp)) && 854 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 855 return nfserr_grace; 856 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 857 rename->rn_snamelen, &cstate->current_fh, 858 rename->rn_tname, rename->rn_tnamelen); 859 if (status) 860 return status; 861 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 862 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 863 return nfs_ok; 864} 865 866static __be32 867nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 868 struct nfsd4_secinfo *secinfo) 869{ 870 struct svc_fh resfh; 871 struct svc_export *exp; 872 struct dentry *dentry; 873 __be32 err; 874 875 fh_init(&resfh, NFS4_FHSIZE); 876 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 877 if (err) 878 return err; 879 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 880 secinfo->si_name, secinfo->si_namelen, 881 &exp, &dentry); 882 if (err) 883 return err; 884 fh_unlock(&cstate->current_fh); 885 if (d_really_is_negative(dentry)) { 886 exp_put(exp); 887 err = nfserr_noent; 888 } else 889 secinfo->si_exp = exp; 890 dput(dentry); 891 if (cstate->minorversion) 892 /* See rfc 5661 section 2.6.3.1.1.8 */ 893 fh_put(&cstate->current_fh); 894 return err; 895} 896 897static __be32 898nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 899 struct nfsd4_secinfo_no_name *sin) 900{ 901 __be32 err; 902 903 switch (sin->sin_style) { 904 case NFS4_SECINFO_STYLE4_CURRENT_FH: 905 break; 906 case NFS4_SECINFO_STYLE4_PARENT: 907 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 908 if (err) 909 return err; 910 break; 911 default: 912 return nfserr_inval; 913 } 914 915 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 916 fh_put(&cstate->current_fh); 917 return nfs_ok; 918} 919 920static __be32 921nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 922 struct nfsd4_setattr *setattr) 923{ 924 __be32 status = nfs_ok; 925 int err; 926 927 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 928 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 929 &setattr->sa_stateid, WR_STATE, NULL); 930 if (status) { 931 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 932 return status; 933 } 934 } 935 err = fh_want_write(&cstate->current_fh); 936 if (err) 937 return nfserrno(err); 938 status = nfs_ok; 939 940 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 941 nfsd_attrmask); 942 if (status) 943 goto out; 944 945 if (setattr->sa_acl != NULL) 946 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 947 setattr->sa_acl); 948 if (status) 949 goto out; 950 if (setattr->sa_label.len) 951 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 952 &setattr->sa_label); 953 if (status) 954 goto out; 955 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 956 0, (time_t)0); 957out: 958 fh_drop_write(&cstate->current_fh); 959 return status; 960} 961 962static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 963{ 964 int i = 1; 965 int buflen = write->wr_buflen; 966 967 vec[0].iov_base = write->wr_head.iov_base; 968 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 969 buflen -= vec[0].iov_len; 970 971 while (buflen) { 972 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 973 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 974 buflen -= vec[i].iov_len; 975 i++; 976 } 977 return i; 978} 979 980static __be32 981nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 982 struct nfsd4_write *write) 983{ 984 stateid_t *stateid = &write->wr_stateid; 985 struct file *filp = NULL; 986 __be32 status = nfs_ok; 987 unsigned long cnt; 988 int nvecs; 989 990 /* no need to check permission - this will be done in nfsd_write() */ 991 992 if (write->wr_offset >= OFFSET_MAX) 993 return nfserr_inval; 994 995 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 996 cstate, stateid, WR_STATE, &filp); 997 if (status) { 998 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 999 return status; 1000 } 1001 1002 cnt = write->wr_buflen; 1003 write->wr_how_written = write->wr_stable_how; 1004 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1005 1006 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1007 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1008 1009 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1010 write->wr_offset, rqstp->rq_vec, nvecs, 1011 &cnt, &write->wr_how_written); 1012 if (filp) 1013 fput(filp); 1014 1015 write->wr_bytes_written = cnt; 1016 1017 return status; 1018} 1019 1020static __be32 1021nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1022 struct nfsd4_fallocate *fallocate, int flags) 1023{ 1024 __be32 status = nfserr_notsupp; 1025 struct file *file; 1026 1027 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1028 &fallocate->falloc_stateid, 1029 WR_STATE, &file); 1030 if (status != nfs_ok) { 1031 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1032 return status; 1033 } 1034 if (!file) 1035 return nfserr_bad_stateid; 1036 1037 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1038 fallocate->falloc_offset, 1039 fallocate->falloc_length, 1040 flags); 1041 fput(file); 1042 return status; 1043} 1044 1045static __be32 1046nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1047 struct nfsd4_fallocate *fallocate) 1048{ 1049 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1050} 1051 1052static __be32 1053nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1054 struct nfsd4_fallocate *fallocate) 1055{ 1056 return nfsd4_fallocate(rqstp, cstate, fallocate, 1057 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1058} 1059 1060static __be32 1061nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1062 struct nfsd4_seek *seek) 1063{ 1064 int whence; 1065 __be32 status; 1066 struct file *file; 1067 1068 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1069 &seek->seek_stateid, 1070 RD_STATE, &file); 1071 if (status) { 1072 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1073 return status; 1074 } 1075 if (!file) 1076 return nfserr_bad_stateid; 1077 1078 switch (seek->seek_whence) { 1079 case NFS4_CONTENT_DATA: 1080 whence = SEEK_DATA; 1081 break; 1082 case NFS4_CONTENT_HOLE: 1083 whence = SEEK_HOLE; 1084 break; 1085 default: 1086 status = nfserr_union_notsupp; 1087 goto out; 1088 } 1089 1090 /* 1091 * Note: This call does change file->f_pos, but nothing in NFSD 1092 * should ever file->f_pos. 1093 */ 1094 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1095 if (seek->seek_pos < 0) 1096 status = nfserrno(seek->seek_pos); 1097 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1098 seek->seek_eof = true; 1099 1100out: 1101 fput(file); 1102 return status; 1103} 1104 1105/* This routine never returns NFS_OK! If there are no other errors, it 1106 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1107 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1108 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1109 */ 1110static __be32 1111_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1112 struct nfsd4_verify *verify) 1113{ 1114 __be32 *buf, *p; 1115 int count; 1116 __be32 status; 1117 1118 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1119 if (status) 1120 return status; 1121 1122 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1123 if (status) 1124 return status; 1125 1126 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1127 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1128 return nfserr_inval; 1129 if (verify->ve_attrlen & 3) 1130 return nfserr_inval; 1131 1132 /* count in words: 1133 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1134 */ 1135 count = 4 + (verify->ve_attrlen >> 2); 1136 buf = kmalloc(count << 2, GFP_KERNEL); 1137 if (!buf) 1138 return nfserr_jukebox; 1139 1140 p = buf; 1141 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1142 cstate->current_fh.fh_export, 1143 cstate->current_fh.fh_dentry, 1144 verify->ve_bmval, 1145 rqstp, 0); 1146 /* 1147 * If nfsd4_encode_fattr() ran out of space, assume that's because 1148 * the attributes are longer (hence different) than those given: 1149 */ 1150 if (status == nfserr_resource) 1151 status = nfserr_not_same; 1152 if (status) 1153 goto out_kfree; 1154 1155 /* skip bitmap */ 1156 p = buf + 1 + ntohl(buf[0]); 1157 status = nfserr_not_same; 1158 if (ntohl(*p++) != verify->ve_attrlen) 1159 goto out_kfree; 1160 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1161 status = nfserr_same; 1162 1163out_kfree: 1164 kfree(buf); 1165 return status; 1166} 1167 1168static __be32 1169nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1170 struct nfsd4_verify *verify) 1171{ 1172 __be32 status; 1173 1174 status = _nfsd4_verify(rqstp, cstate, verify); 1175 return status == nfserr_not_same ? nfs_ok : status; 1176} 1177 1178static __be32 1179nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1180 struct nfsd4_verify *verify) 1181{ 1182 __be32 status; 1183 1184 status = _nfsd4_verify(rqstp, cstate, verify); 1185 return status == nfserr_same ? nfs_ok : status; 1186} 1187 1188#ifdef CONFIG_NFSD_PNFS 1189static const struct nfsd4_layout_ops * 1190nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1191{ 1192 if (!exp->ex_layout_type) { 1193 dprintk("%s: export does not support pNFS\n", __func__); 1194 return NULL; 1195 } 1196 1197 if (exp->ex_layout_type != layout_type) { 1198 dprintk("%s: layout type %d not supported\n", 1199 __func__, layout_type); 1200 return NULL; 1201 } 1202 1203 return nfsd4_layout_ops[layout_type]; 1204} 1205 1206static __be32 1207nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1208 struct nfsd4_compound_state *cstate, 1209 struct nfsd4_getdeviceinfo *gdp) 1210{ 1211 const struct nfsd4_layout_ops *ops; 1212 struct nfsd4_deviceid_map *map; 1213 struct svc_export *exp; 1214 __be32 nfserr; 1215 1216 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1217 __func__, 1218 gdp->gd_layout_type, 1219 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1220 gdp->gd_maxcount); 1221 1222 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1223 if (!map) { 1224 dprintk("%s: couldn't find device ID to export mapping!\n", 1225 __func__); 1226 return nfserr_noent; 1227 } 1228 1229 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1230 if (IS_ERR(exp)) { 1231 dprintk("%s: could not find device id\n", __func__); 1232 return nfserr_noent; 1233 } 1234 1235 nfserr = nfserr_layoutunavailable; 1236 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1237 if (!ops) 1238 goto out; 1239 1240 nfserr = nfs_ok; 1241 if (gdp->gd_maxcount != 0) 1242 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); 1243 1244 gdp->gd_notify_types &= ops->notify_types; 1245out: 1246 exp_put(exp); 1247 return nfserr; 1248} 1249 1250static __be32 1251nfsd4_layoutget(struct svc_rqst *rqstp, 1252 struct nfsd4_compound_state *cstate, 1253 struct nfsd4_layoutget *lgp) 1254{ 1255 struct svc_fh *current_fh = &cstate->current_fh; 1256 const struct nfsd4_layout_ops *ops; 1257 struct nfs4_layout_stateid *ls; 1258 __be32 nfserr; 1259 int accmode; 1260 1261 switch (lgp->lg_seg.iomode) { 1262 case IOMODE_READ: 1263 accmode = NFSD_MAY_READ; 1264 break; 1265 case IOMODE_RW: 1266 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1267 break; 1268 default: 1269 dprintk("%s: invalid iomode %d\n", 1270 __func__, lgp->lg_seg.iomode); 1271 nfserr = nfserr_badiomode; 1272 goto out; 1273 } 1274 1275 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1276 if (nfserr) 1277 goto out; 1278 1279 nfserr = nfserr_layoutunavailable; 1280 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1281 if (!ops) 1282 goto out; 1283 1284 /* 1285 * Verify minlength and range as per RFC5661: 1286 * o If loga_length is less than loga_minlength, 1287 * the metadata server MUST return NFS4ERR_INVAL. 1288 * o If the sum of loga_offset and loga_minlength exceeds 1289 * NFS4_UINT64_MAX, and loga_minlength is not 1290 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1291 * o If the sum of loga_offset and loga_length exceeds 1292 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1293 * the error NFS4ERR_INVAL MUST result. 1294 */ 1295 nfserr = nfserr_inval; 1296 if (lgp->lg_seg.length < lgp->lg_minlength || 1297 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1298 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1299 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1300 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1301 goto out; 1302 if (lgp->lg_seg.length == 0) 1303 goto out; 1304 1305 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1306 true, lgp->lg_layout_type, &ls); 1307 if (nfserr) { 1308 trace_layout_get_lookup_fail(&lgp->lg_sid); 1309 goto out; 1310 } 1311 1312 nfserr = nfserr_recallconflict; 1313 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1314 goto out_put_stid; 1315 1316 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1317 current_fh, lgp); 1318 if (nfserr) 1319 goto out_put_stid; 1320 1321 nfserr = nfsd4_insert_layout(lgp, ls); 1322 1323out_put_stid: 1324 nfs4_put_stid(&ls->ls_stid); 1325out: 1326 return nfserr; 1327} 1328 1329static __be32 1330nfsd4_layoutcommit(struct svc_rqst *rqstp, 1331 struct nfsd4_compound_state *cstate, 1332 struct nfsd4_layoutcommit *lcp) 1333{ 1334 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1335 struct svc_fh *current_fh = &cstate->current_fh; 1336 const struct nfsd4_layout_ops *ops; 1337 loff_t new_size = lcp->lc_last_wr + 1; 1338 struct inode *inode; 1339 struct nfs4_layout_stateid *ls; 1340 __be32 nfserr; 1341 1342 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1343 if (nfserr) 1344 goto out; 1345 1346 nfserr = nfserr_layoutunavailable; 1347 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1348 if (!ops) 1349 goto out; 1350 inode = d_inode(current_fh->fh_dentry); 1351 1352 nfserr = nfserr_inval; 1353 if (new_size <= seg->offset) { 1354 dprintk("pnfsd: last write before layout segment\n"); 1355 goto out; 1356 } 1357 if (new_size > seg->offset + seg->length) { 1358 dprintk("pnfsd: last write beyond layout segment\n"); 1359 goto out; 1360 } 1361 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1362 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1363 goto out; 1364 } 1365 1366 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1367 false, lcp->lc_layout_type, 1368 &ls); 1369 if (nfserr) { 1370 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1371 /* fixup error code as per RFC5661 */ 1372 if (nfserr == nfserr_bad_stateid) 1373 nfserr = nfserr_badlayout; 1374 goto out; 1375 } 1376 1377 nfserr = ops->proc_layoutcommit(inode, lcp); 1378 if (nfserr) 1379 goto out_put_stid; 1380 1381 if (new_size > i_size_read(inode)) { 1382 lcp->lc_size_chg = 1; 1383 lcp->lc_newsize = new_size; 1384 } else { 1385 lcp->lc_size_chg = 0; 1386 } 1387 1388out_put_stid: 1389 nfs4_put_stid(&ls->ls_stid); 1390out: 1391 return nfserr; 1392} 1393 1394static __be32 1395nfsd4_layoutreturn(struct svc_rqst *rqstp, 1396 struct nfsd4_compound_state *cstate, 1397 struct nfsd4_layoutreturn *lrp) 1398{ 1399 struct svc_fh *current_fh = &cstate->current_fh; 1400 __be32 nfserr; 1401 1402 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1403 if (nfserr) 1404 goto out; 1405 1406 nfserr = nfserr_layoutunavailable; 1407 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1408 goto out; 1409 1410 switch (lrp->lr_seg.iomode) { 1411 case IOMODE_READ: 1412 case IOMODE_RW: 1413 case IOMODE_ANY: 1414 break; 1415 default: 1416 dprintk("%s: invalid iomode %d\n", __func__, 1417 lrp->lr_seg.iomode); 1418 nfserr = nfserr_inval; 1419 goto out; 1420 } 1421 1422 switch (lrp->lr_return_type) { 1423 case RETURN_FILE: 1424 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1425 break; 1426 case RETURN_FSID: 1427 case RETURN_ALL: 1428 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1429 break; 1430 default: 1431 dprintk("%s: invalid return_type %d\n", __func__, 1432 lrp->lr_return_type); 1433 nfserr = nfserr_inval; 1434 break; 1435 } 1436out: 1437 return nfserr; 1438} 1439#endif /* CONFIG_NFSD_PNFS */ 1440 1441/* 1442 * NULL call. 1443 */ 1444static __be32 1445nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1446{ 1447 return nfs_ok; 1448} 1449 1450static inline void nfsd4_increment_op_stats(u32 opnum) 1451{ 1452 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1453 nfsdstats.nfs4_opcount[opnum]++; 1454} 1455 1456typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1457 void *); 1458typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1459typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1460typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1461 1462enum nfsd4_op_flags { 1463 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1464 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1465 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1466 /* For rfc 5661 section 2.6.3.1.1: */ 1467 OP_HANDLES_WRONGSEC = 1 << 3, 1468 OP_IS_PUTFH_LIKE = 1 << 4, 1469 /* 1470 * These are the ops whose result size we estimate before 1471 * encoding, to avoid performing an op then not being able to 1472 * respond or cache a response. This includes writes and setattrs 1473 * as well as the operations usually called "nonidempotent": 1474 */ 1475 OP_MODIFIES_SOMETHING = 1 << 5, 1476 /* 1477 * Cache compounds containing these ops in the xid-based drc: 1478 * We use the DRC for compounds containing non-idempotent 1479 * operations, *except* those that are 4.1-specific (since 1480 * sessions provide their own EOS), and except for stateful 1481 * operations other than setclientid and setclientid_confirm 1482 * (since sequence numbers provide EOS for open, lock, etc in 1483 * the v4.0 case). 1484 */ 1485 OP_CACHEME = 1 << 6, 1486 /* 1487 * These are ops which clear current state id. 1488 */ 1489 OP_CLEAR_STATEID = 1 << 7, 1490}; 1491 1492struct nfsd4_operation { 1493 nfsd4op_func op_func; 1494 u32 op_flags; 1495 char *op_name; 1496 /* Try to get response size before operation */ 1497 nfsd4op_rsize op_rsize_bop; 1498 stateid_getter op_get_currentstateid; 1499 stateid_setter op_set_currentstateid; 1500}; 1501 1502static struct nfsd4_operation nfsd4_ops[]; 1503 1504static const char *nfsd4_op_name(unsigned opnum); 1505 1506/* 1507 * Enforce NFSv4.1 COMPOUND ordering rules: 1508 * 1509 * Also note, enforced elsewhere: 1510 * - SEQUENCE other than as first op results in 1511 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1512 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1513 * (Enforced in nfsd4_bind_conn_to_session().) 1514 * - DESTROY_SESSION must be the final operation in a compound, if 1515 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1516 * (Enforced in nfsd4_destroy_session().) 1517 */ 1518static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1519{ 1520 struct nfsd4_op *op = &args->ops[0]; 1521 1522 /* These ordering requirements don't apply to NFSv4.0: */ 1523 if (args->minorversion == 0) 1524 return nfs_ok; 1525 /* This is weird, but OK, not our problem: */ 1526 if (args->opcnt == 0) 1527 return nfs_ok; 1528 if (op->status == nfserr_op_illegal) 1529 return nfs_ok; 1530 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1531 return nfserr_op_not_in_session; 1532 if (op->opnum == OP_SEQUENCE) 1533 return nfs_ok; 1534 if (args->opcnt != 1) 1535 return nfserr_not_only_op; 1536 return nfs_ok; 1537} 1538 1539static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1540{ 1541 return &nfsd4_ops[op->opnum]; 1542} 1543 1544bool nfsd4_cache_this_op(struct nfsd4_op *op) 1545{ 1546 if (op->opnum == OP_ILLEGAL) 1547 return false; 1548 return OPDESC(op)->op_flags & OP_CACHEME; 1549} 1550 1551static bool need_wrongsec_check(struct svc_rqst *rqstp) 1552{ 1553 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1554 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1555 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1556 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1557 struct nfsd4_operation *thisd; 1558 struct nfsd4_operation *nextd; 1559 1560 thisd = OPDESC(this); 1561 /* 1562 * Most ops check wronsec on our own; only the putfh-like ops 1563 * have special rules. 1564 */ 1565 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1566 return false; 1567 /* 1568 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1569 * put-filehandle operation if we're not going to use the 1570 * result: 1571 */ 1572 if (argp->opcnt == resp->opcnt) 1573 return false; 1574 if (next->opnum == OP_ILLEGAL) 1575 return false; 1576 nextd = OPDESC(next); 1577 /* 1578 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1579 * errors themselves as necessary; others should check for them 1580 * now: 1581 */ 1582 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1583} 1584 1585static void svcxdr_init_encode(struct svc_rqst *rqstp, 1586 struct nfsd4_compoundres *resp) 1587{ 1588 struct xdr_stream *xdr = &resp->xdr; 1589 struct xdr_buf *buf = &rqstp->rq_res; 1590 struct kvec *head = buf->head; 1591 1592 xdr->buf = buf; 1593 xdr->iov = head; 1594 xdr->p = head->iov_base + head->iov_len; 1595 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1596 /* Tail and page_len should be zero at this point: */ 1597 buf->len = buf->head[0].iov_len; 1598 xdr->scratch.iov_len = 0; 1599 xdr->page_ptr = buf->pages - 1; 1600 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1601 - rqstp->rq_auth_slack; 1602} 1603 1604/* 1605 * COMPOUND call. 1606 */ 1607static __be32 1608nfsd4_proc_compound(struct svc_rqst *rqstp, 1609 struct nfsd4_compoundargs *args, 1610 struct nfsd4_compoundres *resp) 1611{ 1612 struct nfsd4_op *op; 1613 struct nfsd4_operation *opdesc; 1614 struct nfsd4_compound_state *cstate = &resp->cstate; 1615 struct svc_fh *current_fh = &cstate->current_fh; 1616 struct svc_fh *save_fh = &cstate->save_fh; 1617 __be32 status; 1618 1619 svcxdr_init_encode(rqstp, resp); 1620 resp->tagp = resp->xdr.p; 1621 /* reserve space for: taglen, tag, and opcnt */ 1622 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1623 resp->taglen = args->taglen; 1624 resp->tag = args->tag; 1625 resp->rqstp = rqstp; 1626 cstate->minorversion = args->minorversion; 1627 fh_init(current_fh, NFS4_FHSIZE); 1628 fh_init(save_fh, NFS4_FHSIZE); 1629 /* 1630 * Don't use the deferral mechanism for NFSv4; compounds make it 1631 * too hard to avoid non-idempotency problems. 1632 */ 1633 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1634 1635 /* 1636 * According to RFC3010, this takes precedence over all other errors. 1637 */ 1638 status = nfserr_minor_vers_mismatch; 1639 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1640 goto out; 1641 1642 status = nfs41_check_op_ordering(args); 1643 if (status) { 1644 op = &args->ops[0]; 1645 op->status = status; 1646 goto encode_op; 1647 } 1648 1649 while (!status && resp->opcnt < args->opcnt) { 1650 op = &args->ops[resp->opcnt++]; 1651 1652 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1653 resp->opcnt, args->opcnt, op->opnum, 1654 nfsd4_op_name(op->opnum)); 1655 /* 1656 * The XDR decode routines may have pre-set op->status; 1657 * for example, if there is a miscellaneous XDR error 1658 * it will be set to nfserr_bad_xdr. 1659 */ 1660 if (op->status) { 1661 if (op->opnum == OP_OPEN) 1662 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1663 goto encode_op; 1664 } 1665 1666 opdesc = OPDESC(op); 1667 1668 if (!current_fh->fh_dentry) { 1669 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1670 op->status = nfserr_nofilehandle; 1671 goto encode_op; 1672 } 1673 } else if (current_fh->fh_export->ex_fslocs.migrated && 1674 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1675 op->status = nfserr_moved; 1676 goto encode_op; 1677 } 1678 1679 fh_clear_wcc(current_fh); 1680 1681 /* If op is non-idempotent */ 1682 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1683 /* 1684 * Don't execute this op if we couldn't encode a 1685 * succesful reply: 1686 */ 1687 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1688 /* 1689 * Plus if there's another operation, make sure 1690 * we'll have space to at least encode an error: 1691 */ 1692 if (resp->opcnt < args->opcnt) 1693 plen += COMPOUND_ERR_SLACK_SPACE; 1694 op->status = nfsd4_check_resp_size(resp, plen); 1695 } 1696 1697 if (op->status) 1698 goto encode_op; 1699 1700 if (opdesc->op_get_currentstateid) 1701 opdesc->op_get_currentstateid(cstate, &op->u); 1702 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1703 1704 if (!op->status) { 1705 if (opdesc->op_set_currentstateid) 1706 opdesc->op_set_currentstateid(cstate, &op->u); 1707 1708 if (opdesc->op_flags & OP_CLEAR_STATEID) 1709 clear_current_stateid(cstate); 1710 1711 if (need_wrongsec_check(rqstp)) 1712 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1713 } 1714 1715encode_op: 1716 /* Only from SEQUENCE */ 1717 if (cstate->status == nfserr_replay_cache) { 1718 dprintk("%s NFS4.1 replay from cache\n", __func__); 1719 status = op->status; 1720 goto out; 1721 } 1722 if (op->status == nfserr_replay_me) { 1723 op->replay = &cstate->replay_owner->so_replay; 1724 nfsd4_encode_replay(&resp->xdr, op); 1725 status = op->status = op->replay->rp_status; 1726 } else { 1727 nfsd4_encode_operation(resp, op); 1728 status = op->status; 1729 } 1730 1731 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1732 args->ops, args->opcnt, resp->opcnt, op->opnum, 1733 be32_to_cpu(status)); 1734 1735 nfsd4_cstate_clear_replay(cstate); 1736 /* XXX Ugh, we need to get rid of this kind of special case: */ 1737 if (op->opnum == OP_READ && op->u.read.rd_filp) 1738 fput(op->u.read.rd_filp); 1739 1740 nfsd4_increment_op_stats(op->opnum); 1741 } 1742 1743 cstate->status = status; 1744 fh_put(current_fh); 1745 fh_put(save_fh); 1746 BUG_ON(cstate->replay_owner); 1747out: 1748 /* Reset deferral mechanism for RPC deferrals */ 1749 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1750 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1751 return status; 1752} 1753 1754#define op_encode_hdr_size (2) 1755#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1756#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1757#define op_encode_change_info_maxsz (5) 1758#define nfs4_fattr_bitmap_maxsz (4) 1759 1760/* We'll fall back on returning no lockowner if run out of space: */ 1761#define op_encode_lockowner_maxsz (0) 1762#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1763 1764#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1765 1766#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1767#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1768 op_encode_ace_maxsz) 1769 1770#define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1771 1772static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1773{ 1774 return (op_encode_hdr_size) * sizeof(__be32); 1775} 1776 1777static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1778{ 1779 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1780} 1781 1782static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1783{ 1784 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1785} 1786 1787static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1788{ 1789 return (op_encode_hdr_size + op_encode_change_info_maxsz 1790 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1791} 1792 1793/* 1794 * Note since this is an idempotent operation we won't insist on failing 1795 * the op prematurely if the estimate is too large. We may turn off splice 1796 * reads unnecessarily. 1797 */ 1798static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1799 struct nfsd4_op *op) 1800{ 1801 u32 *bmap = op->u.getattr.ga_bmval; 1802 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1803 u32 ret = 0; 1804 1805 if (bmap0 & FATTR4_WORD0_ACL) 1806 return svc_max_payload(rqstp); 1807 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1808 return svc_max_payload(rqstp); 1809 1810 if (bmap1 & FATTR4_WORD1_OWNER) { 1811 ret += IDMAP_NAMESZ + 4; 1812 bmap1 &= ~FATTR4_WORD1_OWNER; 1813 } 1814 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1815 ret += IDMAP_NAMESZ + 4; 1816 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1817 } 1818 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1819 ret += NFS4_FHSIZE + 4; 1820 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1821 } 1822 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1823 ret += NFS4_MAXLABELLEN + 12; 1824 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1825 } 1826 /* 1827 * Largest of remaining attributes are 16 bytes (e.g., 1828 * supported_attributes) 1829 */ 1830 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1831 /* bitmask, length */ 1832 ret += 20; 1833 return ret; 1834} 1835 1836static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1837{ 1838 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1839 * sizeof(__be32); 1840} 1841 1842static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1843{ 1844 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1845 * sizeof(__be32); 1846} 1847 1848static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1849{ 1850 return (op_encode_hdr_size + op_encode_stateid_maxsz 1851 + op_encode_change_info_maxsz + 1 1852 + nfs4_fattr_bitmap_maxsz 1853 + op_encode_delegation_maxsz) * sizeof(__be32); 1854} 1855 1856static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1857{ 1858 u32 maxcount = 0, rlen = 0; 1859 1860 maxcount = svc_max_payload(rqstp); 1861 rlen = min(op->u.read.rd_length, maxcount); 1862 1863 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1864} 1865 1866static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1867{ 1868 u32 maxcount = 0, rlen = 0; 1869 1870 maxcount = svc_max_payload(rqstp); 1871 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1872 1873 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1874 XDR_QUADLEN(rlen)) * sizeof(__be32); 1875} 1876 1877static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1878{ 1879 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1880 * sizeof(__be32); 1881} 1882 1883static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1884{ 1885 return (op_encode_hdr_size + op_encode_change_info_maxsz 1886 + op_encode_change_info_maxsz) * sizeof(__be32); 1887} 1888 1889static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1890 struct nfsd4_op *op) 1891{ 1892 return (op_encode_hdr_size 1893 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1894} 1895 1896static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1897{ 1898 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1899} 1900 1901static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1902{ 1903 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1904 sizeof(__be32); 1905} 1906 1907static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1908{ 1909 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1910} 1911 1912static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1913{ 1914 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1915 1 + 1 + /* eir_flags, spr_how */\ 1916 4 + /* spo_must_enforce & _allow with bitmap */\ 1917 2 + /*eir_server_owner.so_minor_id */\ 1918 /* eir_server_owner.so_major_id<> */\ 1919 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1920 /* eir_server_scope<> */\ 1921 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1922 1 + /* eir_server_impl_id array length */\ 1923 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1924} 1925 1926static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1927{ 1928 return (op_encode_hdr_size + \ 1929 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1930 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1931} 1932 1933static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1934{ 1935 return (op_encode_hdr_size + \ 1936 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1937 2 + /* csr_sequence, csr_flags */\ 1938 op_encode_channel_attrs_maxsz + \ 1939 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1940} 1941 1942#ifdef CONFIG_NFSD_PNFS 1943/* 1944 * At this stage we don't really know what layout driver will handle the request, 1945 * so we need to define an arbitrary upper bound here. 1946 */ 1947#define MAX_LAYOUT_SIZE 128 1948static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1949{ 1950 return (op_encode_hdr_size + 1951 1 /* logr_return_on_close */ + 1952 op_encode_stateid_maxsz + 1953 1 /* nr of layouts */ + 1954 MAX_LAYOUT_SIZE) * sizeof(__be32); 1955} 1956 1957static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1958{ 1959 return (op_encode_hdr_size + 1960 1 /* locr_newsize */ + 1961 2 /* ns_size */) * sizeof(__be32); 1962} 1963 1964static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1965{ 1966 return (op_encode_hdr_size + 1967 1 /* lrs_stateid */ + 1968 op_encode_stateid_maxsz) * sizeof(__be32); 1969} 1970#endif /* CONFIG_NFSD_PNFS */ 1971 1972static struct nfsd4_operation nfsd4_ops[] = { 1973 [OP_ACCESS] = { 1974 .op_func = (nfsd4op_func)nfsd4_access, 1975 .op_name = "OP_ACCESS", 1976 }, 1977 [OP_CLOSE] = { 1978 .op_func = (nfsd4op_func)nfsd4_close, 1979 .op_flags = OP_MODIFIES_SOMETHING, 1980 .op_name = "OP_CLOSE", 1981 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1982 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1983 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1984 }, 1985 [OP_COMMIT] = { 1986 .op_func = (nfsd4op_func)nfsd4_commit, 1987 .op_flags = OP_MODIFIES_SOMETHING, 1988 .op_name = "OP_COMMIT", 1989 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1990 }, 1991 [OP_CREATE] = { 1992 .op_func = (nfsd4op_func)nfsd4_create, 1993 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1994 .op_name = "OP_CREATE", 1995 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1996 }, 1997 [OP_DELEGRETURN] = { 1998 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1999 .op_flags = OP_MODIFIES_SOMETHING, 2000 .op_name = "OP_DELEGRETURN", 2001 .op_rsize_bop = nfsd4_only_status_rsize, 2002 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2003 }, 2004 [OP_GETATTR] = { 2005 .op_func = (nfsd4op_func)nfsd4_getattr, 2006 .op_flags = ALLOWED_ON_ABSENT_FS, 2007 .op_rsize_bop = nfsd4_getattr_rsize, 2008 .op_name = "OP_GETATTR", 2009 }, 2010 [OP_GETFH] = { 2011 .op_func = (nfsd4op_func)nfsd4_getfh, 2012 .op_name = "OP_GETFH", 2013 }, 2014 [OP_LINK] = { 2015 .op_func = (nfsd4op_func)nfsd4_link, 2016 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2017 | OP_CACHEME, 2018 .op_name = "OP_LINK", 2019 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2020 }, 2021 [OP_LOCK] = { 2022 .op_func = (nfsd4op_func)nfsd4_lock, 2023 .op_flags = OP_MODIFIES_SOMETHING, 2024 .op_name = "OP_LOCK", 2025 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2026 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2027 }, 2028 [OP_LOCKT] = { 2029 .op_func = (nfsd4op_func)nfsd4_lockt, 2030 .op_name = "OP_LOCKT", 2031 }, 2032 [OP_LOCKU] = { 2033 .op_func = (nfsd4op_func)nfsd4_locku, 2034 .op_flags = OP_MODIFIES_SOMETHING, 2035 .op_name = "OP_LOCKU", 2036 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2037 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2038 }, 2039 [OP_LOOKUP] = { 2040 .op_func = (nfsd4op_func)nfsd4_lookup, 2041 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2042 .op_name = "OP_LOOKUP", 2043 }, 2044 [OP_LOOKUPP] = { 2045 .op_func = (nfsd4op_func)nfsd4_lookupp, 2046 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2047 .op_name = "OP_LOOKUPP", 2048 }, 2049 [OP_NVERIFY] = { 2050 .op_func = (nfsd4op_func)nfsd4_nverify, 2051 .op_name = "OP_NVERIFY", 2052 }, 2053 [OP_OPEN] = { 2054 .op_func = (nfsd4op_func)nfsd4_open, 2055 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2056 .op_name = "OP_OPEN", 2057 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2058 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2059 }, 2060 [OP_OPEN_CONFIRM] = { 2061 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2062 .op_flags = OP_MODIFIES_SOMETHING, 2063 .op_name = "OP_OPEN_CONFIRM", 2064 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2065 }, 2066 [OP_OPEN_DOWNGRADE] = { 2067 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2068 .op_flags = OP_MODIFIES_SOMETHING, 2069 .op_name = "OP_OPEN_DOWNGRADE", 2070 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2071 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2072 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2073 }, 2074 [OP_PUTFH] = { 2075 .op_func = (nfsd4op_func)nfsd4_putfh, 2076 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2077 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2078 .op_name = "OP_PUTFH", 2079 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2080 }, 2081 [OP_PUTPUBFH] = { 2082 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2083 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2084 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2085 .op_name = "OP_PUTPUBFH", 2086 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2087 }, 2088 [OP_PUTROOTFH] = { 2089 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2090 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2091 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2092 .op_name = "OP_PUTROOTFH", 2093 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2094 }, 2095 [OP_READ] = { 2096 .op_func = (nfsd4op_func)nfsd4_read, 2097 .op_name = "OP_READ", 2098 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2099 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2100 }, 2101 [OP_READDIR] = { 2102 .op_func = (nfsd4op_func)nfsd4_readdir, 2103 .op_name = "OP_READDIR", 2104 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2105 }, 2106 [OP_READLINK] = { 2107 .op_func = (nfsd4op_func)nfsd4_readlink, 2108 .op_name = "OP_READLINK", 2109 }, 2110 [OP_REMOVE] = { 2111 .op_func = (nfsd4op_func)nfsd4_remove, 2112 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2113 .op_name = "OP_REMOVE", 2114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2115 }, 2116 [OP_RENAME] = { 2117 .op_func = (nfsd4op_func)nfsd4_rename, 2118 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2119 .op_name = "OP_RENAME", 2120 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2121 }, 2122 [OP_RENEW] = { 2123 .op_func = (nfsd4op_func)nfsd4_renew, 2124 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2125 | OP_MODIFIES_SOMETHING, 2126 .op_name = "OP_RENEW", 2127 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2128 2129 }, 2130 [OP_RESTOREFH] = { 2131 .op_func = (nfsd4op_func)nfsd4_restorefh, 2132 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2133 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2134 .op_name = "OP_RESTOREFH", 2135 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2136 }, 2137 [OP_SAVEFH] = { 2138 .op_func = (nfsd4op_func)nfsd4_savefh, 2139 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2140 .op_name = "OP_SAVEFH", 2141 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2142 }, 2143 [OP_SECINFO] = { 2144 .op_func = (nfsd4op_func)nfsd4_secinfo, 2145 .op_flags = OP_HANDLES_WRONGSEC, 2146 .op_name = "OP_SECINFO", 2147 }, 2148 [OP_SETATTR] = { 2149 .op_func = (nfsd4op_func)nfsd4_setattr, 2150 .op_name = "OP_SETATTR", 2151 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2152 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2153 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2154 }, 2155 [OP_SETCLIENTID] = { 2156 .op_func = (nfsd4op_func)nfsd4_setclientid, 2157 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2158 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2159 .op_name = "OP_SETCLIENTID", 2160 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2161 }, 2162 [OP_SETCLIENTID_CONFIRM] = { 2163 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2164 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2165 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2166 .op_name = "OP_SETCLIENTID_CONFIRM", 2167 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2168 }, 2169 [OP_VERIFY] = { 2170 .op_func = (nfsd4op_func)nfsd4_verify, 2171 .op_name = "OP_VERIFY", 2172 }, 2173 [OP_WRITE] = { 2174 .op_func = (nfsd4op_func)nfsd4_write, 2175 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2176 .op_name = "OP_WRITE", 2177 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2178 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2179 }, 2180 [OP_RELEASE_LOCKOWNER] = { 2181 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2182 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2183 | OP_MODIFIES_SOMETHING, 2184 .op_name = "OP_RELEASE_LOCKOWNER", 2185 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2186 }, 2187 2188 /* NFSv4.1 operations */ 2189 [OP_EXCHANGE_ID] = { 2190 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2191 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2192 | OP_MODIFIES_SOMETHING, 2193 .op_name = "OP_EXCHANGE_ID", 2194 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2195 }, 2196 [OP_BACKCHANNEL_CTL] = { 2197 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2198 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2199 .op_name = "OP_BACKCHANNEL_CTL", 2200 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2201 }, 2202 [OP_BIND_CONN_TO_SESSION] = { 2203 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2204 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2205 | OP_MODIFIES_SOMETHING, 2206 .op_name = "OP_BIND_CONN_TO_SESSION", 2207 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2208 }, 2209 [OP_CREATE_SESSION] = { 2210 .op_func = (nfsd4op_func)nfsd4_create_session, 2211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2212 | OP_MODIFIES_SOMETHING, 2213 .op_name = "OP_CREATE_SESSION", 2214 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2215 }, 2216 [OP_DESTROY_SESSION] = { 2217 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2219 | OP_MODIFIES_SOMETHING, 2220 .op_name = "OP_DESTROY_SESSION", 2221 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2222 }, 2223 [OP_SEQUENCE] = { 2224 .op_func = (nfsd4op_func)nfsd4_sequence, 2225 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2226 .op_name = "OP_SEQUENCE", 2227 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2228 }, 2229 [OP_DESTROY_CLIENTID] = { 2230 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2231 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2232 | OP_MODIFIES_SOMETHING, 2233 .op_name = "OP_DESTROY_CLIENTID", 2234 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2235 }, 2236 [OP_RECLAIM_COMPLETE] = { 2237 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2238 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2239 .op_name = "OP_RECLAIM_COMPLETE", 2240 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2241 }, 2242 [OP_SECINFO_NO_NAME] = { 2243 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2244 .op_flags = OP_HANDLES_WRONGSEC, 2245 .op_name = "OP_SECINFO_NO_NAME", 2246 }, 2247 [OP_TEST_STATEID] = { 2248 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2249 .op_flags = ALLOWED_WITHOUT_FH, 2250 .op_name = "OP_TEST_STATEID", 2251 }, 2252 [OP_FREE_STATEID] = { 2253 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2254 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2255 .op_name = "OP_FREE_STATEID", 2256 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2257 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2258 }, 2259#ifdef CONFIG_NFSD_PNFS 2260 [OP_GETDEVICEINFO] = { 2261 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2262 .op_flags = ALLOWED_WITHOUT_FH, 2263 .op_name = "OP_GETDEVICEINFO", 2264 }, 2265 [OP_LAYOUTGET] = { 2266 .op_func = (nfsd4op_func)nfsd4_layoutget, 2267 .op_flags = OP_MODIFIES_SOMETHING, 2268 .op_name = "OP_LAYOUTGET", 2269 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2270 }, 2271 [OP_LAYOUTCOMMIT] = { 2272 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2273 .op_flags = OP_MODIFIES_SOMETHING, 2274 .op_name = "OP_LAYOUTCOMMIT", 2275 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2276 }, 2277 [OP_LAYOUTRETURN] = { 2278 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2279 .op_flags = OP_MODIFIES_SOMETHING, 2280 .op_name = "OP_LAYOUTRETURN", 2281 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2282 }, 2283#endif /* CONFIG_NFSD_PNFS */ 2284 2285 /* NFSv4.2 operations */ 2286 [OP_ALLOCATE] = { 2287 .op_func = (nfsd4op_func)nfsd4_allocate, 2288 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2289 .op_name = "OP_ALLOCATE", 2290 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2291 }, 2292 [OP_DEALLOCATE] = { 2293 .op_func = (nfsd4op_func)nfsd4_deallocate, 2294 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2295 .op_name = "OP_DEALLOCATE", 2296 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2297 }, 2298 [OP_SEEK] = { 2299 .op_func = (nfsd4op_func)nfsd4_seek, 2300 .op_name = "OP_SEEK", 2301 }, 2302}; 2303 2304int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2305{ 2306 struct nfsd4_operation *opdesc; 2307 nfsd4op_rsize estimator; 2308 2309 if (op->opnum == OP_ILLEGAL) 2310 return op_encode_hdr_size * sizeof(__be32); 2311 opdesc = OPDESC(op); 2312 estimator = opdesc->op_rsize_bop; 2313 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2314} 2315 2316void warn_on_nonidempotent_op(struct nfsd4_op *op) 2317{ 2318 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2319 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2320 op->opnum, nfsd4_op_name(op->opnum)); 2321 WARN_ON_ONCE(1); 2322 } 2323} 2324 2325static const char *nfsd4_op_name(unsigned opnum) 2326{ 2327 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2328 return nfsd4_ops[opnum].op_name; 2329 return "unknown_operation"; 2330} 2331 2332#define nfsd4_voidres nfsd4_voidargs 2333struct nfsd4_voidargs { int dummy; }; 2334 2335static struct svc_procedure nfsd_procedures4[2] = { 2336 [NFSPROC4_NULL] = { 2337 .pc_func = (svc_procfunc) nfsd4_proc_null, 2338 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2339 .pc_argsize = sizeof(struct nfsd4_voidargs), 2340 .pc_ressize = sizeof(struct nfsd4_voidres), 2341 .pc_cachetype = RC_NOCACHE, 2342 .pc_xdrressize = 1, 2343 }, 2344 [NFSPROC4_COMPOUND] = { 2345 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2346 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2347 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2348 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2349 .pc_ressize = sizeof(struct nfsd4_compoundres), 2350 .pc_release = nfsd4_release_compoundargs, 2351 .pc_cachetype = RC_NOCACHE, 2352 .pc_xdrressize = NFSD_BUFSIZE/4, 2353 }, 2354}; 2355 2356struct svc_version nfsd_version4 = { 2357 .vs_vers = 4, 2358 .vs_nproc = 2, 2359 .vs_proc = nfsd_procedures4, 2360 .vs_dispatch = nfsd_dispatch, 2361 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2362 .vs_rpcb_optnl = 1, 2363}; 2364 2365/* 2366 * Local variables: 2367 * c-basic-offset: 8 2368 * End: 2369 */ 2370