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/slab.h>
  37
  38#include "idmap.h"
  39#include "cache.h"
  40#include "xdr4.h"
  41#include "vfs.h"
  42#include "current_stateid.h"
  43
  44#define NFSDDBG_FACILITY		NFSDDBG_PROC
  45
  46static u32 nfsd_attrmask[] = {
  47	NFSD_WRITEABLE_ATTRS_WORD0,
  48	NFSD_WRITEABLE_ATTRS_WORD1,
  49	NFSD_WRITEABLE_ATTRS_WORD2
  50};
  51
  52static u32 nfsd41_ex_attrmask[] = {
  53	NFSD_SUPPATTR_EXCLCREAT_WORD0,
  54	NFSD_SUPPATTR_EXCLCREAT_WORD1,
  55	NFSD_SUPPATTR_EXCLCREAT_WORD2
  56};
  57
  58static __be32
  59check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  60		   u32 *bmval, u32 *writable)
  61{
  62	struct dentry *dentry = cstate->current_fh.fh_dentry;
  63
  64	/*
  65	 * Check about attributes are supported by the NFSv4 server or not.
  66	 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  67	 */
  68	if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  69	    (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  70	    (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  71		return nfserr_attrnotsupp;
  72
  73	/*
  74	 * Check FATTR4_WORD0_ACL can be supported
  75	 * in current environment or not.
  76	 */
  77	if (bmval[0] & FATTR4_WORD0_ACL) {
  78		if (!IS_POSIXACL(dentry->d_inode))
  79			return nfserr_attrnotsupp;
  80	}
  81
  82	/*
  83	 * According to spec, read-only attributes return ERR_INVAL.
  84	 */
  85	if (writable) {
  86		if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  87		    (bmval[2] & ~writable[2]))
  88			return nfserr_inval;
  89	}
  90
  91	return nfs_ok;
  92}
  93
  94static __be32
  95nfsd4_check_open_attributes(struct svc_rqst *rqstp,
  96	struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
  97{
  98	__be32 status = nfs_ok;
  99
 100	if (open->op_create == NFS4_OPEN_CREATE) {
 101		if (open->op_createmode == NFS4_CREATE_UNCHECKED
 102		    || open->op_createmode == NFS4_CREATE_GUARDED)
 103			status = check_attr_support(rqstp, cstate,
 104					open->op_bmval, nfsd_attrmask);
 105		else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 106			status = check_attr_support(rqstp, cstate,
 107					open->op_bmval, nfsd41_ex_attrmask);
 108	}
 109
 110	return status;
 111}
 112
 113static int
 114is_create_with_attrs(struct nfsd4_open *open)
 115{
 116	return open->op_create == NFS4_OPEN_CREATE
 117		&& (open->op_createmode == NFS4_CREATE_UNCHECKED
 118		    || open->op_createmode == NFS4_CREATE_GUARDED
 119		    || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 120}
 121
 122/*
 123 * if error occurs when setting the acl, just clear the acl bit
 124 * in the returned attr bitmap.
 125 */
 126static void
 127do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 128		struct nfs4_acl *acl, u32 *bmval)
 129{
 130	__be32 status;
 131
 132	status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 133	if (status)
 134		/*
 135		 * We should probably fail the whole open at this point,
 136		 * but we've already created the file, so it's too late;
 137		 * So this seems the least of evils:
 138		 */
 139		bmval[0] &= ~FATTR4_WORD0_ACL;
 140}
 141
 142static inline void
 143fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 144{
 145	fh_put(dst);
 146	dget(src->fh_dentry);
 147	if (src->fh_export)
 148		cache_get(&src->fh_export->h);
 149	*dst = *src;
 150}
 151
 152static __be32
 153do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 154{
 155	__be32 status;
 156
 157	if (open->op_truncate &&
 158		!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 159		return nfserr_inval;
 160
 161	accmode |= NFSD_MAY_READ_IF_EXEC;
 162
 163	if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 164		accmode |= NFSD_MAY_READ;
 165	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 166		accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 167	if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 168		accmode |= NFSD_MAY_WRITE;
 169
 170	status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 171
 172	return status;
 173}
 174
 175static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 176{
 177	umode_t mode = fh->fh_dentry->d_inode->i_mode;
 178
 179	if (S_ISREG(mode))
 180		return nfs_ok;
 181	if (S_ISDIR(mode))
 182		return nfserr_isdir;
 183	/*
 184	 * Using err_symlink as our catch-all case may look odd; but
 185	 * there's no other obvious error for this case in 4.0, and we
 186	 * happen to know that it will cause the linux v4 client to do
 187	 * the right thing on attempts to open something other than a
 188	 * regular file.
 189	 */
 190	return nfserr_symlink;
 191}
 192
 193static __be32
 194do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 195{
 196	struct svc_fh *resfh;
 197	__be32 status;
 
 198
 199	resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 200	if (!resfh)
 201		return nfserr_jukebox;
 202	fh_init(resfh, NFS4_FHSIZE);
 203	open->op_truncate = 0;
 204
 205	if (open->op_create) {
 206		/* FIXME: check session persistence and pnfs flags.
 207		 * The nfsv4.1 spec requires the following semantics:
 208		 *
 209		 * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 210		 * Reply Cache  | server |                 |
 211		 * -------------+--------+-----------------+--------------------
 212		 * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 213		 *              |        |                 | (SHOULD)
 214		 *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 215		 *              |        |                 | (SHOULD NOT)
 216		 * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 217		 * yes          | no     | GUARDED4        | GUARDED4
 218		 * yes          | yes    | GUARDED4        | GUARDED4
 219		 */
 220
 221		/*
 222		 * Note: create modes (UNCHECKED,GUARDED...) are the same
 223		 * in NFSv4 as in v3 except EXCLUSIVE4_1.
 224		 */
 225		status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 226					open->op_fname.len, &open->op_iattr,
 227					resfh, open->op_createmode,
 228					(u32 *)open->op_verf.data,
 229					&open->op_truncate, &open->op_created);
 230
 231		/*
 232		 * Following rfc 3530 14.2.16, use the returned bitmask
 233		 * to indicate which attributes we used to store the
 234		 * verifier:
 235		 */
 236		if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 237			open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 238							FATTR4_WORD1_TIME_MODIFY);
 239	} else {
 240		status = nfsd_lookup(rqstp, current_fh,
 241				     open->op_fname.data, open->op_fname.len, resfh);
 242		fh_unlock(current_fh);
 243	}
 244	if (status)
 245		goto out;
 246	status = nfsd_check_obj_isreg(resfh);
 247	if (status)
 248		goto out;
 249
 250	if (is_create_with_attrs(open) && open->op_acl != NULL)
 251		do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
 
 
 
 252
 253	/* set reply cache */
 254	fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 255			&resfh->fh_handle);
 256	if (!open->op_created)
 257		status = do_open_permission(rqstp, resfh, open,
 258					    NFSD_MAY_NOP);
 259	set_change_info(&open->op_cinfo, current_fh);
 260	fh_dup2(current_fh, resfh);
 261out:
 262	fh_put(resfh);
 263	kfree(resfh);
 264	return status;
 265}
 266
 267static __be32
 268do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 269{
 270	__be32 status;
 271
 
 
 
 
 272	/* We don't know the target directory, and therefore can not
 273	* set the change info
 274	*/
 275
 276	memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 277
 278	/* set replay cache */
 279	fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 280			&current_fh->fh_handle);
 281
 282	open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 283		(open->op_iattr.ia_size == 0);
 284
 285	status = do_open_permission(rqstp, current_fh, open,
 286				    NFSD_MAY_OWNER_OVERRIDE);
 287
 288	return status;
 289}
 290
 291static void
 292copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 293{
 294	struct nfsd4_sessionid *sid =
 295			(struct nfsd4_sessionid *)session->se_sessionid.data;
 296
 297	clid->cl_boot = sid->clientid.cl_boot;
 298	clid->cl_id = sid->clientid.cl_id;
 299}
 300
 301static __be32
 302nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 303	   struct nfsd4_open *open)
 304{
 305	__be32 status;
 306	struct nfsd4_compoundres *resp;
 307
 308	dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 309		(int)open->op_fname.len, open->op_fname.data,
 310		open->op_openowner);
 311
 312	/* This check required by spec. */
 313	if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 314		return nfserr_inval;
 315
 316	open->op_created = 0;
 317	/*
 318	 * RFC5661 18.51.3
 319	 * Before RECLAIM_COMPLETE done, server should deny new lock
 320	 */
 321	if (nfsd4_has_session(cstate) &&
 322	    !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 323		      &cstate->session->se_client->cl_flags) &&
 324	    open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 325		return nfserr_grace;
 326
 327	if (nfsd4_has_session(cstate))
 328		copy_clientid(&open->op_clientid, cstate->session);
 329
 330	nfs4_lock_state();
 331
 332	/* check seqid for replay. set nfs4_owner */
 333	resp = rqstp->rq_resp;
 334	status = nfsd4_process_open1(&resp->cstate, open);
 335	if (status == nfserr_replay_me) {
 336		struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 337		fh_put(&cstate->current_fh);
 338		fh_copy_shallow(&cstate->current_fh.fh_handle,
 339				&rp->rp_openfh);
 340		status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 341		if (status)
 342			dprintk("nfsd4_open: replay failed"
 343				" restoring previous filehandle\n");
 344		else
 345			status = nfserr_replay_me;
 346	}
 347	if (status)
 348		goto out;
 349
 350	status = nfsd4_check_open_attributes(rqstp, cstate, open);
 351	if (status)
 352		goto out;
 353
 354	/* Openowner is now set, so sequence id will get bumped.  Now we need
 355	 * these checks before we do any creates: */
 356	status = nfserr_grace;
 357	if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 358		goto out;
 359	status = nfserr_no_grace;
 360	if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 361		goto out;
 362
 363	switch (open->op_claim_type) {
 364		case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 365		case NFS4_OPEN_CLAIM_NULL:
 
 
 
 
 
 
 366			status = do_open_lookup(rqstp, &cstate->current_fh,
 367						open);
 368			if (status)
 369				goto out;
 370			break;
 371		case NFS4_OPEN_CLAIM_PREVIOUS:
 372			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 373			status = nfs4_check_open_reclaim(&open->op_clientid);
 374			if (status)
 375				goto out;
 376		case NFS4_OPEN_CLAIM_FH:
 377		case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 
 378			status = do_open_fhandle(rqstp, &cstate->current_fh,
 379						 open);
 380			if (status)
 381				goto out;
 382			break;
 383		case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 384             	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 385			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 386			dprintk("NFSD: unsupported OPEN claim type %d\n",
 387				open->op_claim_type);
 388			status = nfserr_notsupp;
 389			goto out;
 390		default:
 391			dprintk("NFSD: Invalid OPEN claim type %d\n",
 392				open->op_claim_type);
 393			status = nfserr_inval;
 394			goto out;
 395	}
 396	/*
 397	 * nfsd4_process_open2() does the actual opening of the file.  If
 398	 * successful, it (1) truncates the file if open->op_truncate was
 399	 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 400	 */
 401	status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 402	WARN_ON(status && open->op_created);
 403out:
 404	nfsd4_cleanup_open_state(open, status);
 405	if (open->op_openowner)
 406		cstate->replay_owner = &open->op_openowner->oo_owner;
 407	else
 408		nfs4_unlock_state();
 409	return status;
 410}
 411
 412/*
 413 * filehandle-manipulating ops.
 414 */
 415static __be32
 416nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 417	    struct svc_fh **getfh)
 418{
 419	if (!cstate->current_fh.fh_dentry)
 420		return nfserr_nofilehandle;
 421
 422	*getfh = &cstate->current_fh;
 423	return nfs_ok;
 424}
 425
 426static __be32
 427nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 428	    struct nfsd4_putfh *putfh)
 429{
 430	fh_put(&cstate->current_fh);
 431	cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 432	memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 433	       putfh->pf_fhlen);
 434	return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 435}
 436
 437static __be32
 438nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 439		void *arg)
 440{
 441	__be32 status;
 442
 443	fh_put(&cstate->current_fh);
 444	status = exp_pseudoroot(rqstp, &cstate->current_fh);
 445	return status;
 446}
 447
 448static __be32
 449nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 450		void *arg)
 451{
 452	if (!cstate->save_fh.fh_dentry)
 453		return nfserr_restorefh;
 454
 455	fh_dup2(&cstate->current_fh, &cstate->save_fh);
 456	if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 457		memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 458		SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 459	}
 460	return nfs_ok;
 461}
 462
 463static __be32
 464nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 465	     void *arg)
 466{
 467	if (!cstate->current_fh.fh_dentry)
 468		return nfserr_nofilehandle;
 469
 470	fh_dup2(&cstate->save_fh, &cstate->current_fh);
 471	if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 472		memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 473		SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 474	}
 475	return nfs_ok;
 476}
 477
 478/*
 479 * misc nfsv4 ops
 480 */
 481static __be32
 482nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 483	     struct nfsd4_access *access)
 484{
 485	if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 486		return nfserr_inval;
 487
 488	access->ac_resp_access = access->ac_req_access;
 489	return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 490			   &access->ac_supported);
 491}
 492
 493static void gen_boot_verifier(nfs4_verifier *verifier)
 494{
 495	__be32 verf[2];
 496
 497	verf[0] = (__be32)nfssvc_boot.tv_sec;
 498	verf[1] = (__be32)nfssvc_boot.tv_usec;
 499	memcpy(verifier->data, verf, sizeof(verifier->data));
 500}
 501
 502static __be32
 503nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 504	     struct nfsd4_commit *commit)
 505{
 506	gen_boot_verifier(&commit->co_verf);
 507	return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 
 
 
 
 
 508			     commit->co_count);
 
 
 
 509}
 510
 511static __be32
 512nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 513	     struct nfsd4_create *create)
 514{
 515	struct svc_fh resfh;
 516	__be32 status;
 517	dev_t rdev;
 518
 519	fh_init(&resfh, NFS4_FHSIZE);
 520
 521	status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 522			   NFSD_MAY_CREATE);
 
 
 523	if (status)
 524		return status;
 525
 526	status = check_attr_support(rqstp, cstate, create->cr_bmval,
 527				    nfsd_attrmask);
 528	if (status)
 529		return status;
 530
 531	switch (create->cr_type) {
 532	case NF4LNK:
 533		/* ugh! we have to null-terminate the linktext, or
 534		 * vfs_symlink() will choke.  it is always safe to
 535		 * null-terminate by brute force, since at worst we
 536		 * will overwrite the first byte of the create namelen
 537		 * in the XDR buffer, which has already been extracted
 538		 * during XDR decode.
 539		 */
 540		create->cr_linkname[create->cr_linklen] = 0;
 541
 542		status = nfsd_symlink(rqstp, &cstate->current_fh,
 543				      create->cr_name, create->cr_namelen,
 544				      create->cr_linkname, create->cr_linklen,
 545				      &resfh, &create->cr_iattr);
 546		break;
 547
 548	case NF4BLK:
 549		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 550		if (MAJOR(rdev) != create->cr_specdata1 ||
 551		    MINOR(rdev) != create->cr_specdata2)
 552			return nfserr_inval;
 553		status = nfsd_create(rqstp, &cstate->current_fh,
 554				     create->cr_name, create->cr_namelen,
 555				     &create->cr_iattr, S_IFBLK, rdev, &resfh);
 556		break;
 557
 558	case NF4CHR:
 559		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 560		if (MAJOR(rdev) != create->cr_specdata1 ||
 561		    MINOR(rdev) != create->cr_specdata2)
 562			return nfserr_inval;
 563		status = nfsd_create(rqstp, &cstate->current_fh,
 564				     create->cr_name, create->cr_namelen,
 565				     &create->cr_iattr,S_IFCHR, rdev, &resfh);
 566		break;
 567
 568	case NF4SOCK:
 569		status = nfsd_create(rqstp, &cstate->current_fh,
 570				     create->cr_name, create->cr_namelen,
 571				     &create->cr_iattr, S_IFSOCK, 0, &resfh);
 572		break;
 573
 574	case NF4FIFO:
 575		status = nfsd_create(rqstp, &cstate->current_fh,
 576				     create->cr_name, create->cr_namelen,
 577				     &create->cr_iattr, S_IFIFO, 0, &resfh);
 578		break;
 579
 580	case NF4DIR:
 581		create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 582		status = nfsd_create(rqstp, &cstate->current_fh,
 583				     create->cr_name, create->cr_namelen,
 584				     &create->cr_iattr, S_IFDIR, 0, &resfh);
 585		break;
 586
 587	default:
 588		status = nfserr_badtype;
 589	}
 590
 591	if (status)
 592		goto out;
 593
 594	if (create->cr_acl != NULL)
 595		do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 596				create->cr_bmval);
 597
 598	fh_unlock(&cstate->current_fh);
 599	set_change_info(&create->cr_cinfo, &cstate->current_fh);
 600	fh_dup2(&cstate->current_fh, &resfh);
 601out:
 602	fh_put(&resfh);
 603	return status;
 604}
 605
 606static __be32
 607nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 608	      struct nfsd4_getattr *getattr)
 609{
 610	__be32 status;
 611
 612	status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 613	if (status)
 614		return status;
 615
 616	if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 617		return nfserr_inval;
 618
 619	getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 620	getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 621	getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 622
 623	getattr->ga_fhp = &cstate->current_fh;
 624	return nfs_ok;
 625}
 626
 627static __be32
 628nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 629	   struct nfsd4_link *link)
 630{
 631	__be32 status = nfserr_nofilehandle;
 632
 633	if (!cstate->save_fh.fh_dentry)
 634		return status;
 635	status = nfsd_link(rqstp, &cstate->current_fh,
 636			   link->li_name, link->li_namelen, &cstate->save_fh);
 637	if (!status)
 638		set_change_info(&link->li_cinfo, &cstate->current_fh);
 639	return status;
 640}
 641
 642static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 643{
 644	struct svc_fh tmp_fh;
 645	__be32 ret;
 646
 647	fh_init(&tmp_fh, NFS4_FHSIZE);
 648	ret = exp_pseudoroot(rqstp, &tmp_fh);
 649	if (ret)
 650		return ret;
 651	if (tmp_fh.fh_dentry == fh->fh_dentry) {
 652		fh_put(&tmp_fh);
 653		return nfserr_noent;
 654	}
 655	fh_put(&tmp_fh);
 656	return nfsd_lookup(rqstp, fh, "..", 2, fh);
 657}
 658
 659static __be32
 660nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 661	      void *arg)
 662{
 663	return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 664}
 665
 666static __be32
 667nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 668	     struct nfsd4_lookup *lookup)
 669{
 670	return nfsd_lookup(rqstp, &cstate->current_fh,
 671			   lookup->lo_name, lookup->lo_len,
 672			   &cstate->current_fh);
 673}
 674
 675static __be32
 676nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 677	   struct nfsd4_read *read)
 678{
 679	__be32 status;
 680
 681	/* no need to check permission - this will be done in nfsd_read() */
 682
 683	read->rd_filp = NULL;
 684	if (read->rd_offset >= OFFSET_MAX)
 685		return nfserr_inval;
 686
 687	nfs4_lock_state();
 688	/* check stateid */
 689	if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 690						 RD_STATE, &read->rd_filp))) {
 691		dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 692		goto out;
 693	}
 694	if (read->rd_filp)
 695		get_file(read->rd_filp);
 696	status = nfs_ok;
 697out:
 698	nfs4_unlock_state();
 699	read->rd_rqstp = rqstp;
 700	read->rd_fhp = &cstate->current_fh;
 701	return status;
 702}
 703
 704static __be32
 705nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 706	      struct nfsd4_readdir *readdir)
 707{
 708	u64 cookie = readdir->rd_cookie;
 709	static const nfs4_verifier zeroverf;
 710
 711	/* no need to check permission - this will be done in nfsd_readdir() */
 712
 713	if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 714		return nfserr_inval;
 715
 716	readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 717	readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 718	readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 719
 720	if ((cookie == 1) || (cookie == 2) ||
 721	    (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 722		return nfserr_bad_cookie;
 723
 724	readdir->rd_rqstp = rqstp;
 725	readdir->rd_fhp = &cstate->current_fh;
 726	return nfs_ok;
 727}
 728
 729static __be32
 730nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 731	       struct nfsd4_readlink *readlink)
 732{
 733	readlink->rl_rqstp = rqstp;
 734	readlink->rl_fhp = &cstate->current_fh;
 735	return nfs_ok;
 736}
 737
 738static __be32
 739nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 740	     struct nfsd4_remove *remove)
 741{
 742	__be32 status;
 743
 744	if (locks_in_grace())
 745		return nfserr_grace;
 746	status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 747			     remove->rm_name, remove->rm_namelen);
 
 
 748	if (!status) {
 749		fh_unlock(&cstate->current_fh);
 750		set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 751	}
 752	return status;
 753}
 754
 755static __be32
 756nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 757	     struct nfsd4_rename *rename)
 758{
 759	__be32 status = nfserr_nofilehandle;
 760
 761	if (!cstate->save_fh.fh_dentry)
 762		return status;
 763	if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 764					& NFSEXP_NOSUBTREECHECK))
 765		return nfserr_grace;
 766	status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 767			     rename->rn_snamelen, &cstate->current_fh,
 768			     rename->rn_tname, rename->rn_tnamelen);
 769
 770	/* the underlying filesystem returns different error's than required
 771	 * by NFSv4. both save_fh and current_fh have been verified.. */
 772	if (status == nfserr_isdir)
 773		status = nfserr_exist;
 774	else if ((status == nfserr_notdir) &&
 775                  (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 776                   S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 777		status = nfserr_exist;
 
 
 778
 779	if (!status) {
 780		set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 781		set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 782	}
 783	return status;
 784}
 785
 786static __be32
 787nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 788	      struct nfsd4_secinfo *secinfo)
 789{
 790	struct svc_fh resfh;
 791	struct svc_export *exp;
 792	struct dentry *dentry;
 793	__be32 err;
 794
 795	fh_init(&resfh, NFS4_FHSIZE);
 796	err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 797	if (err)
 798		return err;
 799	err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 800				    secinfo->si_name, secinfo->si_namelen,
 801				    &exp, &dentry);
 802	if (err)
 803		return err;
 804	if (dentry->d_inode == NULL) {
 805		exp_put(exp);
 806		err = nfserr_noent;
 807	} else
 808		secinfo->si_exp = exp;
 809	dput(dentry);
 810	if (cstate->minorversion)
 811		/* See rfc 5661 section 2.6.3.1.1.8 */
 812		fh_put(&cstate->current_fh);
 813	return err;
 814}
 815
 816static __be32
 817nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 818	      struct nfsd4_secinfo_no_name *sin)
 819{
 820	__be32 err;
 821
 822	switch (sin->sin_style) {
 823	case NFS4_SECINFO_STYLE4_CURRENT_FH:
 824		break;
 825	case NFS4_SECINFO_STYLE4_PARENT:
 826		err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 827		if (err)
 828			return err;
 829		break;
 830	default:
 831		return nfserr_inval;
 832	}
 833	exp_get(cstate->current_fh.fh_export);
 834	sin->sin_exp = cstate->current_fh.fh_export;
 835	fh_put(&cstate->current_fh);
 836	return nfs_ok;
 837}
 838
 839static __be32
 840nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 841	      struct nfsd4_setattr *setattr)
 842{
 843	__be32 status = nfs_ok;
 844	int err;
 845
 846	if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 847		nfs4_lock_state();
 848		status = nfs4_preprocess_stateid_op(cstate,
 849			&setattr->sa_stateid, WR_STATE, NULL);
 850		nfs4_unlock_state();
 851		if (status) {
 852			dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 853			return status;
 854		}
 855	}
 856	err = fh_want_write(&cstate->current_fh);
 857	if (err)
 858		return nfserrno(err);
 859	status = nfs_ok;
 860
 861	status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 862				    nfsd_attrmask);
 863	if (status)
 864		goto out;
 865
 866	if (setattr->sa_acl != NULL)
 867		status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 868					    setattr->sa_acl);
 869	if (status)
 870		goto out;
 871	status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 872				0, (time_t)0);
 873out:
 874	fh_drop_write(&cstate->current_fh);
 875	return status;
 876}
 877
 878static __be32
 879nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 880	    struct nfsd4_write *write)
 881{
 882	stateid_t *stateid = &write->wr_stateid;
 883	struct file *filp = NULL;
 
 884	__be32 status = nfs_ok;
 885	unsigned long cnt;
 886
 887	/* no need to check permission - this will be done in nfsd_write() */
 888
 889	if (write->wr_offset >= OFFSET_MAX)
 890		return nfserr_inval;
 891
 892	nfs4_lock_state();
 893	status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 894	if (filp)
 895		get_file(filp);
 896	nfs4_unlock_state();
 897
 898	if (status) {
 899		dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 900		return status;
 901	}
 902
 903	cnt = write->wr_buflen;
 904	write->wr_how_written = write->wr_stable_how;
 905	gen_boot_verifier(&write->wr_verifier);
 
 
 906
 907	status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 908			     write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 909			     &cnt, &write->wr_how_written);
 910	if (filp)
 911		fput(filp);
 912
 913	write->wr_bytes_written = cnt;
 914
 
 
 915	return status;
 916}
 917
 918/* This routine never returns NFS_OK!  If there are no other errors, it
 919 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 920 * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 921 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 922 */
 923static __be32
 924_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 925	     struct nfsd4_verify *verify)
 926{
 927	__be32 *buf, *p;
 928	int count;
 929	__be32 status;
 930
 931	status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 932	if (status)
 933		return status;
 934
 935	status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 936	if (status)
 937		return status;
 938
 939	if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 940	    || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 941		return nfserr_inval;
 942	if (verify->ve_attrlen & 3)
 943		return nfserr_inval;
 944
 945	/* count in words:
 946	 *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 947	 */
 948	count = 4 + (verify->ve_attrlen >> 2);
 949	buf = kmalloc(count << 2, GFP_KERNEL);
 950	if (!buf)
 951		return nfserr_jukebox;
 952
 953	status = nfsd4_encode_fattr(&cstate->current_fh,
 954				    cstate->current_fh.fh_export,
 955				    cstate->current_fh.fh_dentry, buf,
 956				    &count, verify->ve_bmval,
 957				    rqstp, 0);
 958
 959	/* this means that nfsd4_encode_fattr() ran out of space */
 960	if (status == nfserr_resource && count == 0)
 961		status = nfserr_not_same;
 962	if (status)
 963		goto out_kfree;
 964
 965	/* skip bitmap */
 966	p = buf + 1 + ntohl(buf[0]);
 967	status = nfserr_not_same;
 968	if (ntohl(*p++) != verify->ve_attrlen)
 969		goto out_kfree;
 970	if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 971		status = nfserr_same;
 972
 973out_kfree:
 974	kfree(buf);
 975	return status;
 976}
 977
 978static __be32
 979nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 980	      struct nfsd4_verify *verify)
 981{
 982	__be32 status;
 983
 984	status = _nfsd4_verify(rqstp, cstate, verify);
 985	return status == nfserr_not_same ? nfs_ok : status;
 986}
 987
 988static __be32
 989nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 990	     struct nfsd4_verify *verify)
 991{
 992	__be32 status;
 993
 994	status = _nfsd4_verify(rqstp, cstate, verify);
 995	return status == nfserr_same ? nfs_ok : status;
 996}
 997
 998/*
 999 * NULL call.
1000 */
1001static __be32
1002nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1003{
1004	return nfs_ok;
1005}
1006
1007static inline void nfsd4_increment_op_stats(u32 opnum)
1008{
1009	if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1010		nfsdstats.nfs4_opcount[opnum]++;
1011}
1012
1013typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1014			      void *);
1015typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1016typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1017typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1018
1019enum nfsd4_op_flags {
1020	ALLOWED_WITHOUT_FH = 1 << 0,	/* No current filehandle required */
1021	ALLOWED_ON_ABSENT_FS = 1 << 1,	/* ops processed on absent fs */
1022	ALLOWED_AS_FIRST_OP = 1 << 2,	/* ops reqired first in compound */
1023	/* For rfc 5661 section 2.6.3.1.1: */
1024	OP_HANDLES_WRONGSEC = 1 << 3,
1025	OP_IS_PUTFH_LIKE = 1 << 4,
 
 
 
 
 
 
1026	/*
1027	 * These are the ops whose result size we estimate before
1028	 * encoding, to avoid performing an op then not being able to
1029	 * respond or cache a response.  This includes writes and setattrs
1030	 * as well as the operations usually called "nonidempotent":
1031	 */
1032	OP_MODIFIES_SOMETHING = 1 << 5,
1033	/*
1034	 * Cache compounds containing these ops in the xid-based drc:
1035	 * We use the DRC for compounds containing non-idempotent
1036	 * operations, *except* those that are 4.1-specific (since
1037	 * sessions provide their own EOS), and except for stateful
1038	 * operations other than setclientid and setclientid_confirm
1039	 * (since sequence numbers provide EOS for open, lock, etc in
1040	 * the v4.0 case).
1041	 */
1042	OP_CACHEME = 1 << 6,
1043	/*
1044	 * These are ops which clear current state id.
1045	 */
1046	OP_CLEAR_STATEID = 1 << 7,
1047};
1048
1049struct nfsd4_operation {
1050	nfsd4op_func op_func;
1051	u32 op_flags;
1052	char *op_name;
1053	/* Try to get response size before operation */
1054	nfsd4op_rsize op_rsize_bop;
1055	stateid_setter op_get_currentstateid;
1056	stateid_getter op_set_currentstateid;
1057};
1058
1059static struct nfsd4_operation nfsd4_ops[];
1060
1061#ifdef NFSD_DEBUG
1062static const char *nfsd4_op_name(unsigned opnum);
1063#endif
1064
1065/*
1066 * Enforce NFSv4.1 COMPOUND ordering rules:
1067 *
1068 * Also note, enforced elsewhere:
1069 *	- SEQUENCE other than as first op results in
1070 *	  NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1071 *	- BIND_CONN_TO_SESSION must be the only op in its compound.
1072 *	  (Enforced in nfsd4_bind_conn_to_session().)
1073 *	- DESTROY_SESSION must be the final operation in a compound, if
1074 *	  sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1075 *	  (Enforced in nfsd4_destroy_session().)
1076 */
1077static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1078{
1079	struct nfsd4_op *op = &args->ops[0];
1080
1081	/* These ordering requirements don't apply to NFSv4.0: */
1082	if (args->minorversion == 0)
1083		return nfs_ok;
1084	/* This is weird, but OK, not our problem: */
1085	if (args->opcnt == 0)
1086		return nfs_ok;
1087	if (op->status == nfserr_op_illegal)
1088		return nfs_ok;
1089	if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1090		return nfserr_op_not_in_session;
1091	if (op->opnum == OP_SEQUENCE)
1092		return nfs_ok;
1093	if (args->opcnt != 1)
1094		return nfserr_not_only_op;
1095	return nfs_ok;
1096}
1097
1098static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1099{
1100	return &nfsd4_ops[op->opnum];
1101}
1102
1103bool nfsd4_cache_this_op(struct nfsd4_op *op)
1104{
1105	return OPDESC(op)->op_flags & OP_CACHEME;
1106}
1107
1108static bool need_wrongsec_check(struct svc_rqst *rqstp)
1109{
1110	struct nfsd4_compoundres *resp = rqstp->rq_resp;
1111	struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1112	struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1113	struct nfsd4_op *next = &argp->ops[resp->opcnt];
1114	struct nfsd4_operation *thisd;
1115	struct nfsd4_operation *nextd;
1116
1117	thisd = OPDESC(this);
1118	/*
1119	 * Most ops check wronsec on our own; only the putfh-like ops
1120	 * have special rules.
1121	 */
1122	if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1123		return false;
1124	/*
1125	 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1126	 * put-filehandle operation if we're not going to use the
1127	 * result:
1128	 */
1129	if (argp->opcnt == resp->opcnt)
1130		return false;
1131
1132	nextd = OPDESC(next);
1133	/*
1134	 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1135	 * errors themselves as necessary; others should check for them
1136	 * now:
1137	 */
1138	return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1139}
1140
1141/*
1142 * COMPOUND call.
1143 */
1144static __be32
1145nfsd4_proc_compound(struct svc_rqst *rqstp,
1146		    struct nfsd4_compoundargs *args,
1147		    struct nfsd4_compoundres *resp)
1148{
1149	struct nfsd4_op	*op;
1150	struct nfsd4_operation *opdesc;
1151	struct nfsd4_compound_state *cstate = &resp->cstate;
1152	int		slack_bytes;
1153	u32		plen = 0;
1154	__be32		status;
1155
1156	resp->xbuf = &rqstp->rq_res;
1157	resp->p = rqstp->rq_res.head[0].iov_base +
1158						rqstp->rq_res.head[0].iov_len;
1159	resp->tagp = resp->p;
1160	/* reserve space for: taglen, tag, and opcnt */
1161	resp->p += 2 + XDR_QUADLEN(args->taglen);
1162	resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1163	resp->taglen = args->taglen;
1164	resp->tag = args->tag;
1165	resp->opcnt = 0;
1166	resp->rqstp = rqstp;
1167	resp->cstate.minorversion = args->minorversion;
1168	resp->cstate.replay_owner = NULL;
1169	resp->cstate.session = NULL;
1170	fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1171	fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1172	/*
1173	 * Don't use the deferral mechanism for NFSv4; compounds make it
1174	 * too hard to avoid non-idempotency problems.
1175	 */
1176	rqstp->rq_usedeferral = 0;
1177
1178	/*
1179	 * According to RFC3010, this takes precedence over all other errors.
1180	 */
1181	status = nfserr_minor_vers_mismatch;
1182	if (args->minorversion > nfsd_supported_minorversion)
1183		goto out;
1184
1185	status = nfs41_check_op_ordering(args);
1186	if (status) {
1187		op = &args->ops[0];
1188		op->status = status;
1189		goto encode_op;
1190	}
1191
1192	while (!status && resp->opcnt < args->opcnt) {
1193		op = &args->ops[resp->opcnt++];
1194
1195		dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1196			resp->opcnt, args->opcnt, op->opnum,
1197			nfsd4_op_name(op->opnum));
1198		/*
1199		 * The XDR decode routines may have pre-set op->status;
1200		 * for example, if there is a miscellaneous XDR error
1201		 * it will be set to nfserr_bad_xdr.
1202		 */
1203		if (op->status)
1204			goto encode_op;
1205
1206		/* We must be able to encode a successful response to
1207		 * this operation, with enough room left over to encode a
1208		 * failed response to the next operation.  If we don't
1209		 * have enough room, fail with ERR_RESOURCE.
1210		 */
1211		slack_bytes = (char *)resp->end - (char *)resp->p;
1212		if (slack_bytes < COMPOUND_SLACK_SPACE
1213				+ COMPOUND_ERR_SLACK_SPACE) {
1214			BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1215			op->status = nfserr_resource;
1216			goto encode_op;
1217		}
1218
1219		opdesc = OPDESC(op);
1220
1221		if (!cstate->current_fh.fh_dentry) {
1222			if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1223				op->status = nfserr_nofilehandle;
1224				goto encode_op;
1225			}
1226		} else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1227			  !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1228			op->status = nfserr_moved;
1229			goto encode_op;
1230		}
1231
1232		/* If op is non-idempotent */
1233		if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1234			plen = opdesc->op_rsize_bop(rqstp, op);
1235			op->status = nfsd4_check_resp_size(resp, plen);
1236		}
1237
1238		if (op->status)
1239			goto encode_op;
1240
1241		if (opdesc->op_func) {
1242			if (opdesc->op_get_currentstateid)
1243				opdesc->op_get_currentstateid(cstate, &op->u);
1244			op->status = opdesc->op_func(rqstp, cstate, &op->u);
1245		} else
1246			BUG_ON(op->status == nfs_ok);
1247
1248		if (!op->status) {
1249			if (opdesc->op_set_currentstateid)
1250				opdesc->op_set_currentstateid(cstate, &op->u);
1251
1252			if (opdesc->op_flags & OP_CLEAR_STATEID)
1253				clear_current_stateid(cstate);
1254
1255			if (need_wrongsec_check(rqstp))
1256				op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1257		}
1258
1259encode_op:
1260		/* Only from SEQUENCE */
1261		if (resp->cstate.status == nfserr_replay_cache) {
1262			dprintk("%s NFS4.1 replay from cache\n", __func__);
1263			status = op->status;
1264			goto out;
1265		}
1266		if (op->status == nfserr_replay_me) {
1267			op->replay = &cstate->replay_owner->so_replay;
1268			nfsd4_encode_replay(resp, op);
1269			status = op->status = op->replay->rp_status;
1270		} else {
1271			nfsd4_encode_operation(resp, op);
1272			status = op->status;
1273		}
1274
1275		dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1276			args->ops, args->opcnt, resp->opcnt, op->opnum,
1277			be32_to_cpu(status));
1278
1279		if (cstate->replay_owner) {
1280			nfs4_unlock_state();
1281			cstate->replay_owner = NULL;
1282		}
1283		/* XXX Ugh, we need to get rid of this kind of special case: */
1284		if (op->opnum == OP_READ && op->u.read.rd_filp)
1285			fput(op->u.read.rd_filp);
1286
1287		nfsd4_increment_op_stats(op->opnum);
1288	}
1289
1290	resp->cstate.status = status;
1291	fh_put(&resp->cstate.current_fh);
1292	fh_put(&resp->cstate.save_fh);
1293	BUG_ON(resp->cstate.replay_owner);
1294out:
1295	/* Reset deferral mechanism for RPC deferrals */
1296	rqstp->rq_usedeferral = 1;
1297	dprintk("nfsv4 compound returned %d\n", ntohl(status));
1298	return status;
1299}
1300
1301#define op_encode_hdr_size		(2)
1302#define op_encode_stateid_maxsz		(XDR_QUADLEN(NFS4_STATEID_SIZE))
1303#define op_encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1304#define op_encode_change_info_maxsz	(5)
1305#define nfs4_fattr_bitmap_maxsz		(4)
1306
1307#define op_encode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
1308#define op_encode_lock_denied_maxsz	(8 + op_encode_lockowner_maxsz)
1309
1310#define nfs4_owner_maxsz		(1 + XDR_QUADLEN(IDMAP_NAMESZ))
1311
1312#define op_encode_ace_maxsz		(3 + nfs4_owner_maxsz)
1313#define op_encode_delegation_maxsz	(1 + op_encode_stateid_maxsz + 1 + \
1314					 op_encode_ace_maxsz)
1315
1316#define op_encode_channel_attrs_maxsz	(6 + 1 + 1)
1317
1318static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1319{
1320	return (op_encode_hdr_size) * sizeof(__be32);
1321}
1322
1323static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1324{
1325	return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1326}
1327
1328static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329{
1330	return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1331}
1332
1333static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1334{
1335	return (op_encode_hdr_size + op_encode_change_info_maxsz
1336		+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1337}
1338
1339static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1340{
1341	return (op_encode_hdr_size + op_encode_change_info_maxsz)
1342		* sizeof(__be32);
1343}
1344
1345static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1346{
1347	return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1348		* sizeof(__be32);
1349}
1350
1351static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1352{
1353	return (op_encode_hdr_size + op_encode_stateid_maxsz
1354		+ op_encode_change_info_maxsz + 1
1355		+ nfs4_fattr_bitmap_maxsz
1356		+ op_encode_delegation_maxsz) * sizeof(__be32);
1357}
1358
1359static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1360{
1361	u32 maxcount = 0, rlen = 0;
1362
1363	maxcount = svc_max_payload(rqstp);
1364	rlen = op->u.read.rd_length;
1365
1366	if (rlen > maxcount)
1367		rlen = maxcount;
1368
1369	return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1370}
1371
1372static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373{
1374	u32 rlen = op->u.readdir.rd_maxcount;
1375
1376	if (rlen > PAGE_SIZE)
1377		rlen = PAGE_SIZE;
1378
1379	return (op_encode_hdr_size + op_encode_verifier_maxsz)
1380		 * sizeof(__be32) + rlen;
1381}
1382
1383static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1384{
1385	return (op_encode_hdr_size + op_encode_change_info_maxsz)
1386		* sizeof(__be32);
1387}
1388
1389static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1390{
1391	return (op_encode_hdr_size + op_encode_change_info_maxsz
1392		+ op_encode_change_info_maxsz) * sizeof(__be32);
1393}
1394
1395static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396{
1397	return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1398}
1399
1400static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1401{
1402	return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1403}
1404
1405static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1406{
1407	return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1408}
1409
1410static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1411{
1412	return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1413		1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1414		2 + /*eir_server_owner.so_minor_id */\
1415		/* eir_server_owner.so_major_id<> */\
1416		XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1417		/* eir_server_scope<> */\
1418		XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1419		1 + /* eir_server_impl_id array length */\
1420		0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1421}
1422
1423static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1424{
1425	return (op_encode_hdr_size + \
1426		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1427		2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1428}
1429
1430static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1431{
1432	return (op_encode_hdr_size + \
1433		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1434		2 + /* csr_sequence, csr_flags */\
1435		op_encode_channel_attrs_maxsz + \
1436		op_encode_channel_attrs_maxsz) * sizeof(__be32);
1437}
1438
1439static struct nfsd4_operation nfsd4_ops[] = {
1440	[OP_ACCESS] = {
1441		.op_func = (nfsd4op_func)nfsd4_access,
1442		.op_name = "OP_ACCESS",
1443	},
1444	[OP_CLOSE] = {
1445		.op_func = (nfsd4op_func)nfsd4_close,
1446		.op_flags = OP_MODIFIES_SOMETHING,
1447		.op_name = "OP_CLOSE",
1448		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1449		.op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1450		.op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1451	},
1452	[OP_COMMIT] = {
1453		.op_func = (nfsd4op_func)nfsd4_commit,
1454		.op_flags = OP_MODIFIES_SOMETHING,
1455		.op_name = "OP_COMMIT",
1456		.op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1457	},
1458	[OP_CREATE] = {
1459		.op_func = (nfsd4op_func)nfsd4_create,
1460		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1461		.op_name = "OP_CREATE",
1462		.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1463	},
1464	[OP_DELEGRETURN] = {
1465		.op_func = (nfsd4op_func)nfsd4_delegreturn,
1466		.op_flags = OP_MODIFIES_SOMETHING,
1467		.op_name = "OP_DELEGRETURN",
1468		.op_rsize_bop = nfsd4_only_status_rsize,
1469		.op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1470	},
1471	[OP_GETATTR] = {
1472		.op_func = (nfsd4op_func)nfsd4_getattr,
1473		.op_flags = ALLOWED_ON_ABSENT_FS,
1474		.op_name = "OP_GETATTR",
1475	},
1476	[OP_GETFH] = {
1477		.op_func = (nfsd4op_func)nfsd4_getfh,
1478		.op_name = "OP_GETFH",
1479	},
1480	[OP_LINK] = {
1481		.op_func = (nfsd4op_func)nfsd4_link,
1482		.op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1483				| OP_CACHEME,
1484		.op_name = "OP_LINK",
1485		.op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1486	},
1487	[OP_LOCK] = {
1488		.op_func = (nfsd4op_func)nfsd4_lock,
1489		.op_flags = OP_MODIFIES_SOMETHING,
1490		.op_name = "OP_LOCK",
1491		.op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1492		.op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1493	},
1494	[OP_LOCKT] = {
1495		.op_func = (nfsd4op_func)nfsd4_lockt,
1496		.op_name = "OP_LOCKT",
1497	},
1498	[OP_LOCKU] = {
1499		.op_func = (nfsd4op_func)nfsd4_locku,
1500		.op_flags = OP_MODIFIES_SOMETHING,
1501		.op_name = "OP_LOCKU",
1502		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1503		.op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1504	},
1505	[OP_LOOKUP] = {
1506		.op_func = (nfsd4op_func)nfsd4_lookup,
1507		.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1508		.op_name = "OP_LOOKUP",
1509	},
1510	[OP_LOOKUPP] = {
1511		.op_func = (nfsd4op_func)nfsd4_lookupp,
1512		.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1513		.op_name = "OP_LOOKUPP",
1514	},
1515	[OP_NVERIFY] = {
1516		.op_func = (nfsd4op_func)nfsd4_nverify,
1517		.op_name = "OP_NVERIFY",
1518	},
1519	[OP_OPEN] = {
1520		.op_func = (nfsd4op_func)nfsd4_open,
1521		.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1522		.op_name = "OP_OPEN",
1523		.op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1524		.op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1525	},
1526	[OP_OPEN_CONFIRM] = {
1527		.op_func = (nfsd4op_func)nfsd4_open_confirm,
1528		.op_flags = OP_MODIFIES_SOMETHING,
1529		.op_name = "OP_OPEN_CONFIRM",
1530		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1531	},
1532	[OP_OPEN_DOWNGRADE] = {
1533		.op_func = (nfsd4op_func)nfsd4_open_downgrade,
1534		.op_flags = OP_MODIFIES_SOMETHING,
1535		.op_name = "OP_OPEN_DOWNGRADE",
1536		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1537		.op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1538		.op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1539	},
1540	[OP_PUTFH] = {
1541		.op_func = (nfsd4op_func)nfsd4_putfh,
1542		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1543				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1544				| OP_CLEAR_STATEID,
1545		.op_name = "OP_PUTFH",
1546		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1547	},
1548	[OP_PUTPUBFH] = {
1549		.op_func = (nfsd4op_func)nfsd4_putrootfh,
1550		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1551				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1552				| OP_CLEAR_STATEID,
1553		.op_name = "OP_PUTPUBFH",
1554		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1555	},
1556	[OP_PUTROOTFH] = {
1557		.op_func = (nfsd4op_func)nfsd4_putrootfh,
1558		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1559				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1560				| OP_CLEAR_STATEID,
1561		.op_name = "OP_PUTROOTFH",
1562		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1563	},
1564	[OP_READ] = {
1565		.op_func = (nfsd4op_func)nfsd4_read,
1566		.op_flags = OP_MODIFIES_SOMETHING,
1567		.op_name = "OP_READ",
1568		.op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1569		.op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1570	},
1571	[OP_READDIR] = {
1572		.op_func = (nfsd4op_func)nfsd4_readdir,
1573		.op_flags = OP_MODIFIES_SOMETHING,
1574		.op_name = "OP_READDIR",
1575		.op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1576	},
1577	[OP_READLINK] = {
1578		.op_func = (nfsd4op_func)nfsd4_readlink,
1579		.op_name = "OP_READLINK",
1580	},
1581	[OP_REMOVE] = {
1582		.op_func = (nfsd4op_func)nfsd4_remove,
1583		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1584		.op_name = "OP_REMOVE",
1585		.op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1586	},
1587	[OP_RENAME] = {
1588		.op_func = (nfsd4op_func)nfsd4_rename,
1589		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1590		.op_name = "OP_RENAME",
1591		.op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
 
1592	},
1593	[OP_RENEW] = {
1594		.op_func = (nfsd4op_func)nfsd4_renew,
1595		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1596				| OP_MODIFIES_SOMETHING,
1597		.op_name = "OP_RENEW",
1598		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1599
1600	},
1601	[OP_RESTOREFH] = {
1602		.op_func = (nfsd4op_func)nfsd4_restorefh,
1603		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1604				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1605		.op_name = "OP_RESTOREFH",
1606		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1607	},
1608	[OP_SAVEFH] = {
1609		.op_func = (nfsd4op_func)nfsd4_savefh,
1610		.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1611		.op_name = "OP_SAVEFH",
1612		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1613	},
1614	[OP_SECINFO] = {
1615		.op_func = (nfsd4op_func)nfsd4_secinfo,
1616		.op_flags = OP_HANDLES_WRONGSEC,
1617		.op_name = "OP_SECINFO",
1618	},
1619	[OP_SETATTR] = {
1620		.op_func = (nfsd4op_func)nfsd4_setattr,
1621		.op_name = "OP_SETATTR",
1622		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1623		.op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1624		.op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1625	},
1626	[OP_SETCLIENTID] = {
1627		.op_func = (nfsd4op_func)nfsd4_setclientid,
1628		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1629				| OP_MODIFIES_SOMETHING | OP_CACHEME,
1630		.op_name = "OP_SETCLIENTID",
1631		.op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1632	},
1633	[OP_SETCLIENTID_CONFIRM] = {
1634		.op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1635		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1636				| OP_MODIFIES_SOMETHING | OP_CACHEME,
1637		.op_name = "OP_SETCLIENTID_CONFIRM",
1638		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1639	},
1640	[OP_VERIFY] = {
1641		.op_func = (nfsd4op_func)nfsd4_verify,
1642		.op_name = "OP_VERIFY",
1643	},
1644	[OP_WRITE] = {
1645		.op_func = (nfsd4op_func)nfsd4_write,
1646		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1647		.op_name = "OP_WRITE",
1648		.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1649		.op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1650	},
1651	[OP_RELEASE_LOCKOWNER] = {
1652		.op_func = (nfsd4op_func)nfsd4_release_lockowner,
1653		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1654				| OP_MODIFIES_SOMETHING,
1655		.op_name = "OP_RELEASE_LOCKOWNER",
1656		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1657	},
1658
1659	/* NFSv4.1 operations */
1660	[OP_EXCHANGE_ID] = {
1661		.op_func = (nfsd4op_func)nfsd4_exchange_id,
1662		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1663				| OP_MODIFIES_SOMETHING,
1664		.op_name = "OP_EXCHANGE_ID",
1665		.op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1666	},
1667	[OP_BIND_CONN_TO_SESSION] = {
1668		.op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1669		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1670				| OP_MODIFIES_SOMETHING,
1671		.op_name = "OP_BIND_CONN_TO_SESSION",
1672		.op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1673	},
1674	[OP_CREATE_SESSION] = {
1675		.op_func = (nfsd4op_func)nfsd4_create_session,
1676		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1677				| OP_MODIFIES_SOMETHING,
1678		.op_name = "OP_CREATE_SESSION",
1679		.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1680	},
1681	[OP_DESTROY_SESSION] = {
1682		.op_func = (nfsd4op_func)nfsd4_destroy_session,
1683		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1684				| OP_MODIFIES_SOMETHING,
1685		.op_name = "OP_DESTROY_SESSION",
1686		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1687	},
1688	[OP_SEQUENCE] = {
1689		.op_func = (nfsd4op_func)nfsd4_sequence,
1690		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1691		.op_name = "OP_SEQUENCE",
1692	},
1693	[OP_DESTROY_CLIENTID] = {
1694		.op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1695		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1696				| OP_MODIFIES_SOMETHING,
1697		.op_name = "OP_DESTROY_CLIENTID",
1698		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1699	},
1700	[OP_RECLAIM_COMPLETE] = {
1701		.op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1702		.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1703		.op_name = "OP_RECLAIM_COMPLETE",
1704		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1705	},
1706	[OP_SECINFO_NO_NAME] = {
1707		.op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1708		.op_flags = OP_HANDLES_WRONGSEC,
1709		.op_name = "OP_SECINFO_NO_NAME",
1710	},
1711	[OP_TEST_STATEID] = {
1712		.op_func = (nfsd4op_func)nfsd4_test_stateid,
1713		.op_flags = ALLOWED_WITHOUT_FH,
1714		.op_name = "OP_TEST_STATEID",
1715	},
1716	[OP_FREE_STATEID] = {
1717		.op_func = (nfsd4op_func)nfsd4_free_stateid,
1718		.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1719		.op_name = "OP_FREE_STATEID",
1720		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1721	},
1722};
1723
1724#ifdef NFSD_DEBUG
1725static const char *nfsd4_op_name(unsigned opnum)
1726{
1727	if (opnum < ARRAY_SIZE(nfsd4_ops))
1728		return nfsd4_ops[opnum].op_name;
1729	return "unknown_operation";
1730}
1731#endif
1732
1733#define nfsd4_voidres			nfsd4_voidargs
1734struct nfsd4_voidargs { int dummy; };
1735
1736static struct svc_procedure		nfsd_procedures4[2] = {
1737	[NFSPROC4_NULL] = {
1738		.pc_func = (svc_procfunc) nfsd4_proc_null,
1739		.pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1740		.pc_argsize = sizeof(struct nfsd4_voidargs),
1741		.pc_ressize = sizeof(struct nfsd4_voidres),
1742		.pc_cachetype = RC_NOCACHE,
1743		.pc_xdrressize = 1,
1744	},
1745	[NFSPROC4_COMPOUND] = {
1746		.pc_func = (svc_procfunc) nfsd4_proc_compound,
1747		.pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1748		.pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1749		.pc_argsize = sizeof(struct nfsd4_compoundargs),
1750		.pc_ressize = sizeof(struct nfsd4_compoundres),
1751		.pc_release = nfsd4_release_compoundargs,
1752		.pc_cachetype = RC_NOCACHE,
1753		.pc_xdrressize = NFSD_BUFSIZE/4,
1754	},
1755};
1756
1757struct svc_version	nfsd_version4 = {
1758		.vs_vers	= 4,
1759		.vs_nproc	= 2,
1760		.vs_proc	= nfsd_procedures4,
1761		.vs_dispatch	= nfsd_dispatch,
1762		.vs_xdrsize	= NFS4_SVC_XDRSIZE,
1763};
1764
1765/*
1766 * Local variables:
1767 *  c-basic-offset: 8
1768 * End:
1769 */