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#include "netns.h"
  44#include "acl.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  45
  46#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
  47#include <linux/security.h>
  48
  49static inline void
  50nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
  51{
  52	struct inode *inode = resfh->fh_dentry->d_inode;
  53	int status;
  54
  55	mutex_lock(&inode->i_mutex);
  56	status = security_inode_setsecctx(resfh->fh_dentry,
  57		label->data, label->len);
  58	mutex_unlock(&inode->i_mutex);
  59
  60	if (status)
  61		/*
  62		 * XXX: We should really fail the whole open, but we may
  63		 * already have created a new file, so it may be too
  64		 * late.  For now this seems the least of evils:
  65		 */
  66		bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
  67
  68	return;
  69}
  70#else
  71static inline void
  72nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
  73{ }
  74#endif
  75
  76#define NFSDDBG_FACILITY		NFSDDBG_PROC
  77
  78static u32 nfsd_attrmask[] = {
  79	NFSD_WRITEABLE_ATTRS_WORD0,
  80	NFSD_WRITEABLE_ATTRS_WORD1,
  81	NFSD_WRITEABLE_ATTRS_WORD2
  82};
  83
  84static u32 nfsd41_ex_attrmask[] = {
  85	NFSD_SUPPATTR_EXCLCREAT_WORD0,
  86	NFSD_SUPPATTR_EXCLCREAT_WORD1,
  87	NFSD_SUPPATTR_EXCLCREAT_WORD2
  88};
  89
  90static __be32
  91check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  92		   u32 *bmval, u32 *writable)
  93{
  94	struct dentry *dentry = cstate->current_fh.fh_dentry;
 
  95
  96	/*
  97	 * Check about attributes are supported by the NFSv4 server or not.
  98	 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  99	 */
 100	if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
 101	    (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
 102	    (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
 103		return nfserr_attrnotsupp;
 104
 105	/*
 106	 * Check FATTR4_WORD0_ACL can be supported
 107	 * in current environment or not.
 108	 */
 109	if (bmval[0] & FATTR4_WORD0_ACL) {
 110		if (!IS_POSIXACL(dentry->d_inode))
 111			return nfserr_attrnotsupp;
 112	}
 113
 114	/*
 115	 * According to spec, read-only attributes return ERR_INVAL.
 116	 */
 117	if (writable) {
 118		if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
 119		    (bmval[2] & ~writable[2]))
 120			return nfserr_inval;
 121	}
 122
 123	return nfs_ok;
 124}
 125
 126static __be32
 127nfsd4_check_open_attributes(struct svc_rqst *rqstp,
 128	struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
 129{
 130	__be32 status = nfs_ok;
 131
 132	if (open->op_create == NFS4_OPEN_CREATE) {
 133		if (open->op_createmode == NFS4_CREATE_UNCHECKED
 134		    || open->op_createmode == NFS4_CREATE_GUARDED)
 135			status = check_attr_support(rqstp, cstate,
 136					open->op_bmval, nfsd_attrmask);
 137		else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 138			status = check_attr_support(rqstp, cstate,
 139					open->op_bmval, nfsd41_ex_attrmask);
 140	}
 141
 142	return status;
 143}
 144
 145static int
 146is_create_with_attrs(struct nfsd4_open *open)
 147{
 148	return open->op_create == NFS4_OPEN_CREATE
 149		&& (open->op_createmode == NFS4_CREATE_UNCHECKED
 150		    || open->op_createmode == NFS4_CREATE_GUARDED
 151		    || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 152}
 153
 154/*
 155 * if error occurs when setting the acl, just clear the acl bit
 156 * in the returned attr bitmap.
 157 */
 158static void
 159do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 160		struct nfs4_acl *acl, u32 *bmval)
 161{
 162	__be32 status;
 163
 164	status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 165	if (status)
 166		/*
 167		 * We should probably fail the whole open at this point,
 168		 * but we've already created the file, so it's too late;
 169		 * So this seems the least of evils:
 170		 */
 171		bmval[0] &= ~FATTR4_WORD0_ACL;
 172}
 173
 174static inline void
 175fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 176{
 177	fh_put(dst);
 178	dget(src->fh_dentry);
 179	if (src->fh_export)
 180		cache_get(&src->fh_export->h);
 181	*dst = *src;
 182}
 183
 184static __be32
 185do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 186{
 187	__be32 status;
 188
 189	if (open->op_truncate &&
 190		!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 191		return nfserr_inval;
 192
 193	accmode |= NFSD_MAY_READ_IF_EXEC;
 194
 195	if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 196		accmode |= NFSD_MAY_READ;
 197	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 198		accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 199	if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 200		accmode |= NFSD_MAY_WRITE;
 201
 202	status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 203
 204	return status;
 205}
 206
 207static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 208{
 209	umode_t mode = fh->fh_dentry->d_inode->i_mode;
 210
 211	if (S_ISREG(mode))
 212		return nfs_ok;
 213	if (S_ISDIR(mode))
 214		return nfserr_isdir;
 215	/*
 216	 * Using err_symlink as our catch-all case may look odd; but
 217	 * there's no other obvious error for this case in 4.0, and we
 218	 * happen to know that it will cause the linux v4 client to do
 219	 * the right thing on attempts to open something other than a
 220	 * regular file.
 221	 */
 222	return nfserr_symlink;
 223}
 224
 225static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
 226{
 227	if (nfsd4_has_session(cstate))
 228		return;
 229	fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 230			&resfh->fh_handle);
 231}
 232
 233static __be32
 234do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
 235{
 236	struct svc_fh *current_fh = &cstate->current_fh;
 237	int accmode;
 238	__be32 status;
 239
 240	*resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 241	if (!*resfh)
 242		return nfserr_jukebox;
 243	fh_init(*resfh, NFS4_FHSIZE);
 244	open->op_truncate = 0;
 245
 246	if (open->op_create) {
 247		/* FIXME: check session persistence and pnfs flags.
 248		 * The nfsv4.1 spec requires the following semantics:
 249		 *
 250		 * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 251		 * Reply Cache  | server |                 |
 252		 * -------------+--------+-----------------+--------------------
 253		 * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 254		 *              |        |                 | (SHOULD)
 255		 *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 256		 *              |        |                 | (SHOULD NOT)
 257		 * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 258		 * yes          | no     | GUARDED4        | GUARDED4
 259		 * yes          | yes    | GUARDED4        | GUARDED4
 260		 */
 261
 262		/*
 263		 * Note: create modes (UNCHECKED,GUARDED...) are the same
 264		 * in NFSv4 as in v3 except EXCLUSIVE4_1.
 265		 */
 266		status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 267					open->op_fname.len, &open->op_iattr,
 
 268					*resfh, open->op_createmode,
 269					(u32 *)open->op_verf.data,
 270					&open->op_truncate, &open->op_created);
 
 271
 272		if (!status && open->op_label.len)
 273			nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
 274
 275		/*
 276		 * Following rfc 3530 14.2.16, use the returned bitmask
 277		 * to indicate which attributes we used to store the
 278		 * verifier:
 279		 */
 280		if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 281			open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 282							FATTR4_WORD1_TIME_MODIFY);
 283	} else
 284		/*
 285		 * Note this may exit with the parent still locked.
 286		 * We will hold the lock until nfsd4_open's final
 287		 * lookup, to prevent renames or unlinks until we've had
 288		 * a chance to an acquire a delegation if appropriate.
 289		 */
 290		status = nfsd_lookup(rqstp, current_fh,
 291				     open->op_fname.data, open->op_fname.len, *resfh);
 292	if (status)
 293		goto out;
 294	status = nfsd_check_obj_isreg(*resfh);
 295	if (status)
 296		goto out;
 297
 298	if (is_create_with_attrs(open) && open->op_acl != NULL)
 299		do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
 300
 301	nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
 302	accmode = NFSD_MAY_NOP;
 303	if (open->op_created ||
 304			open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
 305		accmode |= NFSD_MAY_OWNER_OVERRIDE;
 306	status = do_open_permission(rqstp, *resfh, open, accmode);
 307	set_change_info(&open->op_cinfo, current_fh);
 308out:
 309	return status;
 310}
 311
 312static __be32
 313do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
 314{
 315	struct svc_fh *current_fh = &cstate->current_fh;
 316	__be32 status;
 317	int accmode = 0;
 318
 319	/* We don't know the target directory, and therefore can not
 320	* set the change info
 321	*/
 322
 323	memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 324
 325	nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
 326
 327	open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 328		(open->op_iattr.ia_size == 0);
 329	/*
 330	 * In the delegation case, the client is telling us about an
 331	 * open that it *already* performed locally, some time ago.  We
 332	 * should let it succeed now if possible.
 333	 *
 334	 * In the case of a CLAIM_FH open, on the other hand, the client
 335	 * may be counting on us to enforce permissions (the Linux 4.1
 336	 * client uses this for normal opens, for example).
 337	 */
 338	if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
 339		accmode = NFSD_MAY_OWNER_OVERRIDE;
 340
 341	status = do_open_permission(rqstp, current_fh, open, accmode);
 342
 343	return status;
 344}
 345
 346static void
 347copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 348{
 349	struct nfsd4_sessionid *sid =
 350			(struct nfsd4_sessionid *)session->se_sessionid.data;
 351
 352	clid->cl_boot = sid->clientid.cl_boot;
 353	clid->cl_id = sid->clientid.cl_id;
 354}
 355
 356static __be32
 357nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 358	   struct nfsd4_open *open)
 359{
 
 360	__be32 status;
 361	struct svc_fh *resfh = NULL;
 362	struct nfsd4_compoundres *resp;
 363	struct net *net = SVC_NET(rqstp);
 364	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
 365
 366	dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 367		(int)open->op_fname.len, open->op_fname.data,
 368		open->op_openowner);
 369
 370	/* This check required by spec. */
 371	if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 372		return nfserr_inval;
 373
 374	open->op_created = 0;
 375	/*
 376	 * RFC5661 18.51.3
 377	 * Before RECLAIM_COMPLETE done, server should deny new lock
 378	 */
 379	if (nfsd4_has_session(cstate) &&
 380	    !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 381		      &cstate->session->se_client->cl_flags) &&
 382	    open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 383		return nfserr_grace;
 384
 385	if (nfsd4_has_session(cstate))
 386		copy_clientid(&open->op_clientid, cstate->session);
 387
 388	nfs4_lock_state();
 389
 390	/* check seqid for replay. set nfs4_owner */
 391	resp = rqstp->rq_resp;
 392	status = nfsd4_process_open1(&resp->cstate, open, nn);
 393	if (status == nfserr_replay_me) {
 394		struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 395		fh_put(&cstate->current_fh);
 396		fh_copy_shallow(&cstate->current_fh.fh_handle,
 397				&rp->rp_openfh);
 398		status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 399		if (status)
 400			dprintk("nfsd4_open: replay failed"
 401				" restoring previous filehandle\n");
 402		else
 403			status = nfserr_replay_me;
 404	}
 405	if (status)
 406		goto out;
 407	if (open->op_xdr_error) {
 408		status = open->op_xdr_error;
 409		goto out;
 410	}
 411
 412	status = nfsd4_check_open_attributes(rqstp, cstate, open);
 413	if (status)
 414		goto out;
 415
 416	/* Openowner is now set, so sequence id will get bumped.  Now we need
 417	 * these checks before we do any creates: */
 418	status = nfserr_grace;
 419	if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 420		goto out;
 421	status = nfserr_no_grace;
 422	if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 423		goto out;
 424
 425	switch (open->op_claim_type) {
 426		case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 427		case NFS4_OPEN_CLAIM_NULL:
 428			status = do_open_lookup(rqstp, cstate, open, &resfh);
 429			if (status)
 430				goto out;
 431			break;
 432		case NFS4_OPEN_CLAIM_PREVIOUS:
 433			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 434			status = nfs4_check_open_reclaim(&open->op_clientid,
 435							 cstate->minorversion,
 436							 nn);
 437			if (status)
 438				goto out;
 
 
 
 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			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 449			dprintk("NFSD: unsupported OPEN claim type %d\n",
 450				open->op_claim_type);
 451			status = nfserr_notsupp;
 452			goto out;
 453		default:
 454			dprintk("NFSD: Invalid OPEN claim type %d\n",
 455				open->op_claim_type);
 456			status = nfserr_inval;
 457			goto out;
 458	}
 459	/*
 460	 * nfsd4_process_open2() does the actual opening of the file.  If
 461	 * successful, it (1) truncates the file if open->op_truncate was
 462	 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 463	 */
 464	status = nfsd4_process_open2(rqstp, resfh, open);
 465	WARN_ON(status && open->op_created);
 
 
 
 
 466out:
 467	if (resfh && resfh != &cstate->current_fh) {
 468		fh_dup2(&cstate->current_fh, resfh);
 469		fh_put(resfh);
 470		kfree(resfh);
 471	}
 472	nfsd4_cleanup_open_state(open, status);
 473	if (open->op_openowner && !nfsd4_has_session(cstate))
 474		cstate->replay_owner = &open->op_openowner->oo_owner;
 475	nfsd4_bump_seqid(cstate, status);
 476	if (!cstate->replay_owner)
 477		nfs4_unlock_state();
 478	return status;
 479}
 480
 481/*
 482 * OPEN is the only seqid-mutating operation whose decoding can fail
 483 * with a seqid-mutating error (specifically, decoding of user names in
 484 * the attributes).  Therefore we have to do some processing to look up
 485 * the stateowner so that we can bump the seqid.
 486 */
 487static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
 488{
 489	struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
 490
 491	if (!seqid_mutating_err(ntohl(op->status)))
 492		return op->status;
 493	if (nfsd4_has_session(cstate))
 494		return op->status;
 495	open->op_xdr_error = op->status;
 496	return nfsd4_open(rqstp, cstate, open);
 497}
 498
 499/*
 500 * filehandle-manipulating ops.
 501 */
 502static __be32
 503nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 504	    struct svc_fh **getfh)
 505{
 506	if (!cstate->current_fh.fh_dentry)
 507		return nfserr_nofilehandle;
 508
 509	*getfh = &cstate->current_fh;
 510	return nfs_ok;
 511}
 512
 513static __be32
 514nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 515	    struct nfsd4_putfh *putfh)
 516{
 
 
 
 517	fh_put(&cstate->current_fh);
 518	cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 519	memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 520	       putfh->pf_fhlen);
 521	return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 
 
 
 
 
 
 
 522}
 523
 524static __be32
 525nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 526		void *arg)
 527{
 528	__be32 status;
 529
 530	fh_put(&cstate->current_fh);
 531	status = exp_pseudoroot(rqstp, &cstate->current_fh);
 532	return status;
 533}
 534
 535static __be32
 536nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 537		void *arg)
 538{
 539	if (!cstate->save_fh.fh_dentry)
 540		return nfserr_restorefh;
 541
 542	fh_dup2(&cstate->current_fh, &cstate->save_fh);
 543	if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 544		memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 545		SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 546	}
 547	return nfs_ok;
 548}
 549
 550static __be32
 551nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 552	     void *arg)
 553{
 554	if (!cstate->current_fh.fh_dentry)
 555		return nfserr_nofilehandle;
 556
 557	fh_dup2(&cstate->save_fh, &cstate->current_fh);
 558	if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 559		memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 560		SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 561	}
 562	return nfs_ok;
 563}
 564
 565/*
 566 * misc nfsv4 ops
 567 */
 568static __be32
 569nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 570	     struct nfsd4_access *access)
 571{
 572	if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 
 
 
 
 
 
 
 
 573		return nfserr_inval;
 574
 575	access->ac_resp_access = access->ac_req_access;
 576	return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 577			   &access->ac_supported);
 578}
 579
 580static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
 581{
 582	__be32 verf[2];
 583	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
 584
 585	verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
 586	verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
 587	memcpy(verifier->data, verf, sizeof(verifier->data));
 588}
 589
 590static __be32
 591nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 592	     struct nfsd4_commit *commit)
 593{
 594	gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
 
 595	return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 596			     commit->co_count);
 
 597}
 598
 599static __be32
 600nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 601	     struct nfsd4_create *create)
 602{
 
 603	struct svc_fh resfh;
 604	__be32 status;
 605	dev_t rdev;
 606
 607	fh_init(&resfh, NFS4_FHSIZE);
 608
 609	status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 610			   NFSD_MAY_CREATE);
 611	if (status)
 612		return status;
 613
 614	status = check_attr_support(rqstp, cstate, create->cr_bmval,
 615				    nfsd_attrmask);
 616	if (status)
 617		return status;
 618
 
 619	switch (create->cr_type) {
 620	case NF4LNK:
 621		/* ugh! we have to null-terminate the linktext, or
 622		 * vfs_symlink() will choke.  it is always safe to
 623		 * null-terminate by brute force, since at worst we
 624		 * will overwrite the first byte of the create namelen
 625		 * in the XDR buffer, which has already been extracted
 626		 * during XDR decode.
 627		 */
 628		create->cr_linkname[create->cr_linklen] = 0;
 629
 630		status = nfsd_symlink(rqstp, &cstate->current_fh,
 631				      create->cr_name, create->cr_namelen,
 632				      create->cr_linkname, create->cr_linklen,
 633				      &resfh, &create->cr_iattr);
 634		break;
 635
 636	case NF4BLK:
 
 637		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 638		if (MAJOR(rdev) != create->cr_specdata1 ||
 639		    MINOR(rdev) != create->cr_specdata2)
 640			return nfserr_inval;
 641		status = nfsd_create(rqstp, &cstate->current_fh,
 642				     create->cr_name, create->cr_namelen,
 643				     &create->cr_iattr, S_IFBLK, rdev, &resfh);
 644		break;
 645
 646	case NF4CHR:
 
 647		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 648		if (MAJOR(rdev) != create->cr_specdata1 ||
 649		    MINOR(rdev) != create->cr_specdata2)
 650			return nfserr_inval;
 651		status = nfsd_create(rqstp, &cstate->current_fh,
 652				     create->cr_name, create->cr_namelen,
 653				     &create->cr_iattr,S_IFCHR, rdev, &resfh);
 654		break;
 655
 656	case NF4SOCK:
 657		status = nfsd_create(rqstp, &cstate->current_fh,
 658				     create->cr_name, create->cr_namelen,
 659				     &create->cr_iattr, S_IFSOCK, 0, &resfh);
 660		break;
 661
 662	case NF4FIFO:
 663		status = nfsd_create(rqstp, &cstate->current_fh,
 664				     create->cr_name, create->cr_namelen,
 665				     &create->cr_iattr, S_IFIFO, 0, &resfh);
 666		break;
 667
 668	case NF4DIR:
 669		create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 670		status = nfsd_create(rqstp, &cstate->current_fh,
 671				     create->cr_name, create->cr_namelen,
 672				     &create->cr_iattr, S_IFDIR, 0, &resfh);
 673		break;
 674
 675	default:
 676		status = nfserr_badtype;
 677	}
 678
 679	if (status)
 680		goto out;
 681
 682	if (create->cr_label.len)
 683		nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
 684
 685	if (create->cr_acl != NULL)
 686		do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 687				create->cr_bmval);
 688
 689	fh_unlock(&cstate->current_fh);
 690	set_change_info(&create->cr_cinfo, &cstate->current_fh);
 691	fh_dup2(&cstate->current_fh, &resfh);
 692out:
 693	fh_put(&resfh);
 
 
 694	return status;
 695}
 696
 697static __be32
 698nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 699	      struct nfsd4_getattr *getattr)
 700{
 
 701	__be32 status;
 702
 703	status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 704	if (status)
 705		return status;
 706
 707	if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 708		return nfserr_inval;
 709
 710	getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 711	getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 712	getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 713
 714	getattr->ga_fhp = &cstate->current_fh;
 715	return nfs_ok;
 716}
 717
 718static __be32
 719nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 720	   struct nfsd4_link *link)
 721{
 722	__be32 status = nfserr_nofilehandle;
 
 723
 724	if (!cstate->save_fh.fh_dentry)
 725		return status;
 726	status = nfsd_link(rqstp, &cstate->current_fh,
 727			   link->li_name, link->li_namelen, &cstate->save_fh);
 728	if (!status)
 729		set_change_info(&link->li_cinfo, &cstate->current_fh);
 730	return status;
 731}
 732
 733static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 734{
 735	struct svc_fh tmp_fh;
 736	__be32 ret;
 737
 738	fh_init(&tmp_fh, NFS4_FHSIZE);
 739	ret = exp_pseudoroot(rqstp, &tmp_fh);
 740	if (ret)
 741		return ret;
 742	if (tmp_fh.fh_dentry == fh->fh_dentry) {
 743		fh_put(&tmp_fh);
 744		return nfserr_noent;
 745	}
 746	fh_put(&tmp_fh);
 747	return nfsd_lookup(rqstp, fh, "..", 2, fh);
 748}
 749
 750static __be32
 751nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 752	      void *arg)
 753{
 754	return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 755}
 756
 757static __be32
 758nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 759	     struct nfsd4_lookup *lookup)
 760{
 761	return nfsd_lookup(rqstp, &cstate->current_fh,
 762			   lookup->lo_name, lookup->lo_len,
 763			   &cstate->current_fh);
 764}
 765
 766static __be32
 767nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 768	   struct nfsd4_read *read)
 769{
 
 770	__be32 status;
 771
 772	/* no need to check permission - this will be done in nfsd_read() */
 773
 774	read->rd_filp = NULL;
 775	if (read->rd_offset >= OFFSET_MAX)
 776		return nfserr_inval;
 777
 
 
 
 778	/*
 779	 * If we do a zero copy read, then a client will see read data
 780	 * that reflects the state of the file *after* performing the
 781	 * following compound.
 782	 *
 783	 * To ensure proper ordering, we therefore turn off zero copy if
 784	 * the client wants us to do more in this compound:
 785	 */
 786	if (!nfsd4_last_compound_op(rqstp))
 787		rqstp->rq_splice_ok = false;
 788
 789	nfs4_lock_state();
 790	/* check stateid */
 791	if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 792						 cstate, &read->rd_stateid,
 793						 RD_STATE, &read->rd_filp))) {
 
 794		dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 795		goto out;
 796	}
 797	if (read->rd_filp)
 798		get_file(read->rd_filp);
 799	status = nfs_ok;
 800out:
 801	nfs4_unlock_state();
 802	read->rd_rqstp = rqstp;
 803	read->rd_fhp = &cstate->current_fh;
 804	return status;
 805}
 806
 
 
 
 
 
 
 
 
 
 
 807static __be32
 808nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 809	      struct nfsd4_readdir *readdir)
 810{
 
 811	u64 cookie = readdir->rd_cookie;
 812	static const nfs4_verifier zeroverf;
 813
 814	/* no need to check permission - this will be done in nfsd_readdir() */
 815
 816	if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 817		return nfserr_inval;
 818
 819	readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 820	readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 821	readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 822
 823	if ((cookie == 1) || (cookie == 2) ||
 824	    (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 825		return nfserr_bad_cookie;
 826
 827	readdir->rd_rqstp = rqstp;
 828	readdir->rd_fhp = &cstate->current_fh;
 829	return nfs_ok;
 830}
 831
 832static __be32
 833nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 834	       struct nfsd4_readlink *readlink)
 835{
 836	readlink->rl_rqstp = rqstp;
 837	readlink->rl_fhp = &cstate->current_fh;
 838	return nfs_ok;
 839}
 840
 841static __be32
 842nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 843	     struct nfsd4_remove *remove)
 844{
 
 845	__be32 status;
 846
 847	if (locks_in_grace(SVC_NET(rqstp)))
 848		return nfserr_grace;
 849	status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 850			     remove->rm_name, remove->rm_namelen);
 851	if (!status) {
 852		fh_unlock(&cstate->current_fh);
 853		set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 854	}
 855	return status;
 856}
 857
 858static __be32
 859nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 860	     struct nfsd4_rename *rename)
 861{
 862	__be32 status = nfserr_nofilehandle;
 
 863
 864	if (!cstate->save_fh.fh_dentry)
 865		return status;
 866	if (locks_in_grace(SVC_NET(rqstp)) &&
 867		!(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
 868		return nfserr_grace;
 869	status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 870			     rename->rn_snamelen, &cstate->current_fh,
 871			     rename->rn_tname, rename->rn_tnamelen);
 872	if (status)
 873		return status;
 874	set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 875	set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 876	return nfs_ok;
 877}
 878
 879static __be32
 880nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 881	      struct nfsd4_secinfo *secinfo)
 882{
 883	struct svc_fh resfh;
 884	struct svc_export *exp;
 885	struct dentry *dentry;
 886	__be32 err;
 887
 888	fh_init(&resfh, NFS4_FHSIZE);
 889	err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 890	if (err)
 891		return err;
 892	err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 893				    secinfo->si_name, secinfo->si_namelen,
 894				    &exp, &dentry);
 895	if (err)
 896		return err;
 897	if (dentry->d_inode == NULL) {
 
 898		exp_put(exp);
 899		err = nfserr_noent;
 900	} else
 901		secinfo->si_exp = exp;
 902	dput(dentry);
 903	if (cstate->minorversion)
 904		/* See rfc 5661 section 2.6.3.1.1.8 */
 905		fh_put(&cstate->current_fh);
 906	return err;
 907}
 908
 909static __be32
 910nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 911	      struct nfsd4_secinfo_no_name *sin)
 912{
 913	__be32 err;
 914
 915	switch (sin->sin_style) {
 916	case NFS4_SECINFO_STYLE4_CURRENT_FH:
 917		break;
 918	case NFS4_SECINFO_STYLE4_PARENT:
 919		err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 920		if (err)
 921			return err;
 922		break;
 923	default:
 924		return nfserr_inval;
 925	}
 926	exp_get(cstate->current_fh.fh_export);
 927	sin->sin_exp = cstate->current_fh.fh_export;
 928	fh_put(&cstate->current_fh);
 929	return nfs_ok;
 930}
 931
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 932static __be32
 933nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 934	      struct nfsd4_setattr *setattr)
 935{
 
 936	__be32 status = nfs_ok;
 937	int err;
 938
 939	if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 940		nfs4_lock_state();
 941		status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
 942			&setattr->sa_stateid, WR_STATE, NULL);
 943		nfs4_unlock_state();
 944		if (status) {
 945			dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 946			return status;
 947		}
 948	}
 949	err = fh_want_write(&cstate->current_fh);
 950	if (err)
 951		return nfserrno(err);
 952	status = nfs_ok;
 953
 954	status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 955				    nfsd_attrmask);
 956	if (status)
 957		goto out;
 958
 959	if (setattr->sa_acl != NULL)
 960		status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 961					    setattr->sa_acl);
 962	if (status)
 963		goto out;
 964	if (setattr->sa_label.len)
 965		status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
 966				&setattr->sa_label);
 967	if (status)
 968		goto out;
 969	status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 970				0, (time_t)0);
 971out:
 972	fh_drop_write(&cstate->current_fh);
 973	return status;
 974}
 975
 976static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
 977{
 978        int i = 1;
 979        int buflen = write->wr_buflen;
 980
 981        vec[0].iov_base = write->wr_head.iov_base;
 982        vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
 983        buflen -= vec[0].iov_len;
 984
 985        while (buflen) {
 986                vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
 987                vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
 988                buflen -= vec[i].iov_len;
 989                i++;
 990        }
 991        return i;
 992}
 993
 994static __be32
 995nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 996	    struct nfsd4_write *write)
 997{
 
 998	stateid_t *stateid = &write->wr_stateid;
 999	struct file *filp = NULL;
1000	__be32 status = nfs_ok;
1001	unsigned long cnt;
1002	int nvecs;
1003
1004	/* no need to check permission - this will be done in nfsd_write() */
1005
1006	if (write->wr_offset >= OFFSET_MAX)
1007		return nfserr_inval;
1008
1009	nfs4_lock_state();
1010	status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
1011					cstate, stateid, WR_STATE, &filp);
 
 
1012	if (status) {
1013		nfs4_unlock_state();
1014		dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1015		return status;
1016	}
1017	if (filp)
1018		get_file(filp);
1019	nfs4_unlock_state();
1020
1021	cnt = write->wr_buflen;
1022	write->wr_how_written = write->wr_stable_how;
1023	gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1024
1025	nvecs = fill_in_write_vector(rqstp->rq_vec, write);
 
1026	WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1027
1028	status =  nfsd_write(rqstp, &cstate->current_fh, filp,
1029			     write->wr_offset, rqstp->rq_vec, nvecs,
1030			     &cnt, &write->wr_how_written);
1031	if (filp)
1032		fput(filp);
1033
1034	write->wr_bytes_written = cnt;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1035
1036	return status;
1037}
1038
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1039/* This routine never returns NFS_OK!  If there are no other errors, it
1040 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1041 * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
1042 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1043 */
1044static __be32
1045_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1046	     struct nfsd4_verify *verify)
1047{
1048	__be32 *buf, *p;
1049	int count;
1050	__be32 status;
1051
1052	status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1053	if (status)
1054		return status;
1055
1056	status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1057	if (status)
1058		return status;
1059
1060	if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1061	    || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1062		return nfserr_inval;
1063	if (verify->ve_attrlen & 3)
1064		return nfserr_inval;
1065
1066	/* count in words:
1067	 *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1068	 */
1069	count = 4 + (verify->ve_attrlen >> 2);
1070	buf = kmalloc(count << 2, GFP_KERNEL);
1071	if (!buf)
1072		return nfserr_jukebox;
1073
1074	p = buf;
1075	status = nfsd4_encode_fattr(&cstate->current_fh,
1076				    cstate->current_fh.fh_export,
1077				    cstate->current_fh.fh_dentry, &p,
1078				    count, verify->ve_bmval,
1079				    rqstp, 0);
1080	/*
1081	 * If nfsd4_encode_fattr() ran out of space, assume that's because
1082	 * the attributes are longer (hence different) than those given:
1083	 */
1084	if (status == nfserr_resource)
1085		status = nfserr_not_same;
1086	if (status)
1087		goto out_kfree;
1088
1089	/* skip bitmap */
1090	p = buf + 1 + ntohl(buf[0]);
1091	status = nfserr_not_same;
1092	if (ntohl(*p++) != verify->ve_attrlen)
1093		goto out_kfree;
1094	if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1095		status = nfserr_same;
1096
1097out_kfree:
1098	kfree(buf);
1099	return status;
1100}
1101
1102static __be32
1103nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1104	      struct nfsd4_verify *verify)
1105{
1106	__be32 status;
1107
1108	status = _nfsd4_verify(rqstp, cstate, verify);
1109	return status == nfserr_not_same ? nfs_ok : status;
1110}
1111
1112static __be32
1113nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1114	     struct nfsd4_verify *verify)
1115{
1116	__be32 status;
1117
1118	status = _nfsd4_verify(rqstp, cstate, verify);
1119	return status == nfserr_same ? nfs_ok : status;
1120}
1121
1122/*
1123 * NULL call.
1124 */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1125static __be32
1126nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 
1127{
1128	return nfs_ok;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1129}
1130
1131static inline void nfsd4_increment_op_stats(u32 opnum)
 
1132{
1133	if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1134		nfsdstats.nfs4_opcount[opnum]++;
1135}
1136
1137typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1138			      void *);
1139typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1140typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1141typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1142
1143enum nfsd4_op_flags {
1144	ALLOWED_WITHOUT_FH = 1 << 0,	/* No current filehandle required */
1145	ALLOWED_ON_ABSENT_FS = 1 << 1,	/* ops processed on absent fs */
1146	ALLOWED_AS_FIRST_OP = 1 << 2,	/* ops reqired first in compound */
1147	/* For rfc 5661 section 2.6.3.1.1: */
1148	OP_HANDLES_WRONGSEC = 1 << 3,
1149	OP_IS_PUTFH_LIKE = 1 << 4,
1150	/*
1151	 * These are the ops whose result size we estimate before
1152	 * encoding, to avoid performing an op then not being able to
1153	 * respond or cache a response.  This includes writes and setattrs
1154	 * as well as the operations usually called "nonidempotent":
1155	 */
1156	OP_MODIFIES_SOMETHING = 1 << 5,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1157	/*
1158	 * Cache compounds containing these ops in the xid-based drc:
1159	 * We use the DRC for compounds containing non-idempotent
1160	 * operations, *except* those that are 4.1-specific (since
1161	 * sessions provide their own EOS), and except for stateful
1162	 * operations other than setclientid and setclientid_confirm
1163	 * (since sequence numbers provide EOS for open, lock, etc in
1164	 * the v4.0 case).
 
 
1165	 */
1166	OP_CACHEME = 1 << 6,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1167	/*
1168	 * These are ops which clear current state id.
 
1169	 */
1170	OP_CLEAR_STATEID = 1 << 7,
1171};
 
1172
1173struct nfsd4_operation {
1174	nfsd4op_func op_func;
1175	u32 op_flags;
1176	char *op_name;
1177	/* Try to get response size before operation */
1178	nfsd4op_rsize op_rsize_bop;
1179	stateid_getter op_get_currentstateid;
1180	stateid_setter op_set_currentstateid;
1181};
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1182
1183static struct nfsd4_operation nfsd4_ops[];
 
 
 
 
 
 
1184
1185#ifdef NFSD_DEBUG
1186static const char *nfsd4_op_name(unsigned opnum);
1187#endif
1188
1189/*
1190 * Enforce NFSv4.1 COMPOUND ordering rules:
1191 *
1192 * Also note, enforced elsewhere:
1193 *	- SEQUENCE other than as first op results in
1194 *	  NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1195 *	- BIND_CONN_TO_SESSION must be the only op in its compound.
1196 *	  (Enforced in nfsd4_bind_conn_to_session().)
1197 *	- DESTROY_SESSION must be the final operation in a compound, if
1198 *	  sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1199 *	  (Enforced in nfsd4_destroy_session().)
1200 */
1201static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1202{
1203	struct nfsd4_op *op = &args->ops[0];
1204
1205	/* These ordering requirements don't apply to NFSv4.0: */
1206	if (args->minorversion == 0)
1207		return nfs_ok;
1208	/* This is weird, but OK, not our problem: */
1209	if (args->opcnt == 0)
1210		return nfs_ok;
1211	if (op->status == nfserr_op_illegal)
1212		return nfs_ok;
1213	if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1214		return nfserr_op_not_in_session;
1215	if (op->opnum == OP_SEQUENCE)
1216		return nfs_ok;
 
 
 
 
 
1217	if (args->opcnt != 1)
1218		return nfserr_not_only_op;
1219	return nfs_ok;
1220}
1221
1222static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1223{
1224	return &nfsd4_ops[op->opnum];
1225}
1226
1227bool nfsd4_cache_this_op(struct nfsd4_op *op)
1228{
 
 
1229	return OPDESC(op)->op_flags & OP_CACHEME;
1230}
1231
1232static bool need_wrongsec_check(struct svc_rqst *rqstp)
1233{
1234	struct nfsd4_compoundres *resp = rqstp->rq_resp;
1235	struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1236	struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1237	struct nfsd4_op *next = &argp->ops[resp->opcnt];
1238	struct nfsd4_operation *thisd;
1239	struct nfsd4_operation *nextd;
1240
1241	thisd = OPDESC(this);
1242	/*
1243	 * Most ops check wronsec on our own; only the putfh-like ops
1244	 * have special rules.
1245	 */
1246	if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1247		return false;
1248	/*
1249	 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1250	 * put-filehandle operation if we're not going to use the
1251	 * result:
1252	 */
1253	if (argp->opcnt == resp->opcnt)
1254		return false;
1255
 
1256	nextd = OPDESC(next);
1257	/*
1258	 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1259	 * errors themselves as necessary; others should check for them
1260	 * now:
1261	 */
1262	return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1263}
1264
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1265/*
1266 * COMPOUND call.
1267 */
1268static __be32
1269nfsd4_proc_compound(struct svc_rqst *rqstp,
1270		    struct nfsd4_compoundargs *args,
1271		    struct nfsd4_compoundres *resp)
1272{
 
 
1273	struct nfsd4_op	*op;
1274	struct nfsd4_operation *opdesc;
1275	struct nfsd4_compound_state *cstate = &resp->cstate;
1276	struct svc_fh *current_fh = &cstate->current_fh;
1277	struct svc_fh *save_fh = &cstate->save_fh;
1278	int		slack_bytes;
1279	u32		plen = 0;
1280	__be32		status;
1281
1282	resp->xbuf = &rqstp->rq_res;
1283	resp->p = rqstp->rq_res.head[0].iov_base +
1284						rqstp->rq_res.head[0].iov_len;
1285	resp->tagp = resp->p;
 
 
1286	/* reserve space for: taglen, tag, and opcnt */
1287	resp->p += 2 + XDR_QUADLEN(args->taglen);
1288	resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1289	resp->taglen = args->taglen;
1290	resp->tag = args->tag;
1291	resp->opcnt = 0;
1292	resp->rqstp = rqstp;
1293	cstate->minorversion = args->minorversion;
1294	cstate->replay_owner = NULL;
1295	cstate->session = NULL;
1296	fh_init(current_fh, NFS4_FHSIZE);
1297	fh_init(save_fh, NFS4_FHSIZE);
1298	/*
1299	 * Don't use the deferral mechanism for NFSv4; compounds make it
1300	 * too hard to avoid non-idempotency problems.
1301	 */
1302	rqstp->rq_usedeferral = 0;
1303
1304	/*
1305	 * According to RFC3010, this takes precedence over all other errors.
1306	 */
1307	status = nfserr_minor_vers_mismatch;
1308	if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
 
 
 
1309		goto out;
1310
1311	status = nfs41_check_op_ordering(args);
1312	if (status) {
1313		op = &args->ops[0];
1314		op->status = status;
 
1315		goto encode_op;
1316	}
 
1317
 
 
 
1318	while (!status && resp->opcnt < args->opcnt) {
1319		op = &args->ops[resp->opcnt++];
1320
1321		dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1322			resp->opcnt, args->opcnt, op->opnum,
1323			nfsd4_op_name(op->opnum));
1324		/*
1325		 * The XDR decode routines may have pre-set op->status;
1326		 * for example, if there is a miscellaneous XDR error
1327		 * it will be set to nfserr_bad_xdr.
1328		 */
1329		if (op->status) {
1330			if (op->opnum == OP_OPEN)
1331				op->status = nfsd4_open_omfg(rqstp, cstate, op);
1332			goto encode_op;
1333		}
1334
1335		/* We must be able to encode a successful response to
1336		 * this operation, with enough room left over to encode a
1337		 * failed response to the next operation.  If we don't
1338		 * have enough room, fail with ERR_RESOURCE.
1339		 */
1340		slack_bytes = (char *)resp->end - (char *)resp->p;
1341		if (slack_bytes < COMPOUND_SLACK_SPACE
1342				+ COMPOUND_ERR_SLACK_SPACE) {
1343			BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1344			op->status = nfserr_resource;
1345			goto encode_op;
1346		}
1347
1348		opdesc = OPDESC(op);
1349
1350		if (!current_fh->fh_dentry) {
1351			if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1352				op->status = nfserr_nofilehandle;
1353				goto encode_op;
1354			}
1355		} else if (current_fh->fh_export->ex_fslocs.migrated &&
1356			  !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
 
1357			op->status = nfserr_moved;
1358			goto encode_op;
1359		}
1360
1361		fh_clear_wcc(current_fh);
1362
1363		/* If op is non-idempotent */
1364		if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1365			plen = opdesc->op_rsize_bop(rqstp, op);
 
 
 
 
1366			/*
1367			 * If there's still another operation, make sure
1368			 * we'll have space to at least encode an error:
1369			 */
1370			if (resp->opcnt < args->opcnt)
1371				plen += COMPOUND_ERR_SLACK_SPACE;
1372			op->status = nfsd4_check_resp_size(resp, plen);
1373		}
1374
1375		if (op->status)
1376			goto encode_op;
1377
1378		if (opdesc->op_get_currentstateid)
1379			opdesc->op_get_currentstateid(cstate, &op->u);
1380		op->status = opdesc->op_func(rqstp, cstate, &op->u);
1381
 
 
 
 
 
 
1382		if (!op->status) {
1383			if (opdesc->op_set_currentstateid)
1384				opdesc->op_set_currentstateid(cstate, &op->u);
1385
1386			if (opdesc->op_flags & OP_CLEAR_STATEID)
1387				clear_current_stateid(cstate);
1388
1389			if (need_wrongsec_check(rqstp))
 
1390				op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1391		}
1392
1393encode_op:
1394		/* Only from SEQUENCE */
1395		if (cstate->status == nfserr_replay_cache) {
1396			dprintk("%s NFS4.1 replay from cache\n", __func__);
1397			status = op->status;
1398			goto out;
1399		}
1400		if (op->status == nfserr_replay_me) {
1401			op->replay = &cstate->replay_owner->so_replay;
1402			nfsd4_encode_replay(resp, op);
1403			status = op->status = op->replay->rp_status;
1404		} else {
1405			nfsd4_encode_operation(resp, op);
1406			status = op->status;
1407		}
1408
1409		dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1410			args->ops, args->opcnt, resp->opcnt, op->opnum,
1411			be32_to_cpu(status));
1412
1413		if (cstate->replay_owner) {
1414			nfs4_unlock_state();
1415			cstate->replay_owner = NULL;
1416		}
1417		/* XXX Ugh, we need to get rid of this kind of special case: */
1418		if (op->opnum == OP_READ && op->u.read.rd_filp)
1419			fput(op->u.read.rd_filp);
1420
 
1421		nfsd4_increment_op_stats(op->opnum);
1422	}
1423
1424	cstate->status = status;
1425	fh_put(current_fh);
1426	fh_put(save_fh);
1427	BUG_ON(cstate->replay_owner);
1428out:
 
1429	/* Reset deferral mechanism for RPC deferrals */
1430	rqstp->rq_usedeferral = 1;
1431	dprintk("nfsv4 compound returned %d\n", ntohl(status));
1432	return status;
1433}
1434
1435#define op_encode_hdr_size		(2)
1436#define op_encode_stateid_maxsz		(XDR_QUADLEN(NFS4_STATEID_SIZE))
1437#define op_encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1438#define op_encode_change_info_maxsz	(5)
1439#define nfs4_fattr_bitmap_maxsz		(4)
1440
1441#define op_encode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
 
1442#define op_encode_lock_denied_maxsz	(8 + op_encode_lockowner_maxsz)
1443
1444#define nfs4_owner_maxsz		(1 + XDR_QUADLEN(IDMAP_NAMESZ))
1445
1446#define op_encode_ace_maxsz		(3 + nfs4_owner_maxsz)
1447#define op_encode_delegation_maxsz	(1 + op_encode_stateid_maxsz + 1 + \
1448					 op_encode_ace_maxsz)
1449
1450#define op_encode_channel_attrs_maxsz	(6 + 1 + 1)
1451
1452static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1453{
1454	return (op_encode_hdr_size) * sizeof(__be32);
1455}
1456
1457static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1458{
1459	return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1460}
1461
 
 
 
 
 
 
1462static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1463{
1464	return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1465}
1466
1467static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468{
1469	return (op_encode_hdr_size + op_encode_change_info_maxsz
1470		+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1471}
1472
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1473static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1474{
1475	return (op_encode_hdr_size + op_encode_change_info_maxsz)
1476		* sizeof(__be32);
1477}
1478
1479static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1480{
1481	return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1482		* sizeof(__be32);
1483}
1484
1485static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1486{
1487	return (op_encode_hdr_size + op_encode_stateid_maxsz
1488		+ op_encode_change_info_maxsz + 1
1489		+ nfs4_fattr_bitmap_maxsz
1490		+ op_encode_delegation_maxsz) * sizeof(__be32);
1491}
1492
1493static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1494{
1495	u32 maxcount = 0, rlen = 0;
1496
1497	maxcount = svc_max_payload(rqstp);
1498	rlen = op->u.read.rd_length;
1499
1500	if (rlen > maxcount)
1501		rlen = maxcount;
 
 
 
 
 
 
 
 
 
 
 
1502
1503	return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1504}
1505
1506static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1507{
1508	u32 rlen = op->u.readdir.rd_maxcount;
1509
1510	if (rlen > PAGE_SIZE)
1511		rlen = PAGE_SIZE;
1512
1513	return (op_encode_hdr_size + op_encode_verifier_maxsz)
1514		 * sizeof(__be32) + rlen;
 
 
 
 
 
1515}
1516
1517static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1518{
1519	return (op_encode_hdr_size + op_encode_change_info_maxsz)
1520		* sizeof(__be32);
1521}
1522
1523static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1524{
1525	return (op_encode_hdr_size + op_encode_change_info_maxsz
1526		+ op_encode_change_info_maxsz) * sizeof(__be32);
1527}
1528
 
 
 
 
 
 
 
 
 
 
 
 
 
1529static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1530{
1531	return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1532}
1533
 
 
 
 
 
 
1534static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1535{
1536	return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1537								sizeof(__be32);
1538}
1539
1540static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1541{
1542	return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1543}
1544
1545static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1546{
1547	return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1548		1 + 1 + /* eir_flags, spr_how */\
1549		4 + /* spo_must_enforce & _allow with bitmap */\
1550		2 + /*eir_server_owner.so_minor_id */\
1551		/* eir_server_owner.so_major_id<> */\
1552		XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1553		/* eir_server_scope<> */\
1554		XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1555		1 + /* eir_server_impl_id array length */\
1556		0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1557}
1558
1559static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1560{
1561	return (op_encode_hdr_size + \
1562		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1563		2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1564}
1565
1566static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1567{
1568	return (op_encode_hdr_size + \
1569		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1570		2 + /* csr_sequence, csr_flags */\
1571		op_encode_channel_attrs_maxsz + \
1572		op_encode_channel_attrs_maxsz) * sizeof(__be32);
1573}
1574
1575static struct nfsd4_operation nfsd4_ops[] = {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1576	[OP_ACCESS] = {
1577		.op_func = (nfsd4op_func)nfsd4_access,
1578		.op_name = "OP_ACCESS",
 
1579	},
1580	[OP_CLOSE] = {
1581		.op_func = (nfsd4op_func)nfsd4_close,
1582		.op_flags = OP_MODIFIES_SOMETHING,
1583		.op_name = "OP_CLOSE",
1584		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1585		.op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1586		.op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1587	},
1588	[OP_COMMIT] = {
1589		.op_func = (nfsd4op_func)nfsd4_commit,
1590		.op_flags = OP_MODIFIES_SOMETHING,
1591		.op_name = "OP_COMMIT",
1592		.op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1593	},
1594	[OP_CREATE] = {
1595		.op_func = (nfsd4op_func)nfsd4_create,
1596		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1597		.op_name = "OP_CREATE",
1598		.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1599	},
1600	[OP_DELEGRETURN] = {
1601		.op_func = (nfsd4op_func)nfsd4_delegreturn,
1602		.op_flags = OP_MODIFIES_SOMETHING,
1603		.op_name = "OP_DELEGRETURN",
1604		.op_rsize_bop = nfsd4_only_status_rsize,
1605		.op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1606	},
1607	[OP_GETATTR] = {
1608		.op_func = (nfsd4op_func)nfsd4_getattr,
1609		.op_flags = ALLOWED_ON_ABSENT_FS,
 
1610		.op_name = "OP_GETATTR",
1611	},
1612	[OP_GETFH] = {
1613		.op_func = (nfsd4op_func)nfsd4_getfh,
1614		.op_name = "OP_GETFH",
 
1615	},
1616	[OP_LINK] = {
1617		.op_func = (nfsd4op_func)nfsd4_link,
1618		.op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1619				| OP_CACHEME,
1620		.op_name = "OP_LINK",
1621		.op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1622	},
1623	[OP_LOCK] = {
1624		.op_func = (nfsd4op_func)nfsd4_lock,
1625		.op_flags = OP_MODIFIES_SOMETHING,
 
1626		.op_name = "OP_LOCK",
1627		.op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1628		.op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1629	},
1630	[OP_LOCKT] = {
1631		.op_func = (nfsd4op_func)nfsd4_lockt,
 
1632		.op_name = "OP_LOCKT",
 
1633	},
1634	[OP_LOCKU] = {
1635		.op_func = (nfsd4op_func)nfsd4_locku,
1636		.op_flags = OP_MODIFIES_SOMETHING,
1637		.op_name = "OP_LOCKU",
1638		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1639		.op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1640	},
1641	[OP_LOOKUP] = {
1642		.op_func = (nfsd4op_func)nfsd4_lookup,
1643		.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1644		.op_name = "OP_LOOKUP",
 
1645	},
1646	[OP_LOOKUPP] = {
1647		.op_func = (nfsd4op_func)nfsd4_lookupp,
1648		.op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1649		.op_name = "OP_LOOKUPP",
 
1650	},
1651	[OP_NVERIFY] = {
1652		.op_func = (nfsd4op_func)nfsd4_nverify,
1653		.op_name = "OP_NVERIFY",
 
1654	},
1655	[OP_OPEN] = {
1656		.op_func = (nfsd4op_func)nfsd4_open,
1657		.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1658		.op_name = "OP_OPEN",
1659		.op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1660		.op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1661	},
1662	[OP_OPEN_CONFIRM] = {
1663		.op_func = (nfsd4op_func)nfsd4_open_confirm,
1664		.op_flags = OP_MODIFIES_SOMETHING,
1665		.op_name = "OP_OPEN_CONFIRM",
1666		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1667	},
1668	[OP_OPEN_DOWNGRADE] = {
1669		.op_func = (nfsd4op_func)nfsd4_open_downgrade,
1670		.op_flags = OP_MODIFIES_SOMETHING,
1671		.op_name = "OP_OPEN_DOWNGRADE",
1672		.op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1673		.op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1674		.op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1675	},
1676	[OP_PUTFH] = {
1677		.op_func = (nfsd4op_func)nfsd4_putfh,
1678		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1679				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1680				| OP_CLEAR_STATEID,
1681		.op_name = "OP_PUTFH",
1682		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1683	},
1684	[OP_PUTPUBFH] = {
1685		.op_func = (nfsd4op_func)nfsd4_putrootfh,
1686		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1687				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1688				| OP_CLEAR_STATEID,
1689		.op_name = "OP_PUTPUBFH",
1690		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1691	},
1692	[OP_PUTROOTFH] = {
1693		.op_func = (nfsd4op_func)nfsd4_putrootfh,
1694		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1695				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1696				| OP_CLEAR_STATEID,
1697		.op_name = "OP_PUTROOTFH",
1698		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1699	},
1700	[OP_READ] = {
1701		.op_func = (nfsd4op_func)nfsd4_read,
1702		.op_flags = OP_MODIFIES_SOMETHING,
1703		.op_name = "OP_READ",
1704		.op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1705		.op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1706	},
1707	[OP_READDIR] = {
1708		.op_func = (nfsd4op_func)nfsd4_readdir,
1709		.op_flags = OP_MODIFIES_SOMETHING,
1710		.op_name = "OP_READDIR",
1711		.op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1712	},
1713	[OP_READLINK] = {
1714		.op_func = (nfsd4op_func)nfsd4_readlink,
1715		.op_name = "OP_READLINK",
 
1716	},
1717	[OP_REMOVE] = {
1718		.op_func = (nfsd4op_func)nfsd4_remove,
1719		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1720		.op_name = "OP_REMOVE",
1721		.op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1722	},
1723	[OP_RENAME] = {
1724		.op_func = (nfsd4op_func)nfsd4_rename,
1725		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1726		.op_name = "OP_RENAME",
1727		.op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1728	},
1729	[OP_RENEW] = {
1730		.op_func = (nfsd4op_func)nfsd4_renew,
1731		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1732				| OP_MODIFIES_SOMETHING,
1733		.op_name = "OP_RENEW",
1734		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1735
1736	},
1737	[OP_RESTOREFH] = {
1738		.op_func = (nfsd4op_func)nfsd4_restorefh,
1739		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1740				| OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1741		.op_name = "OP_RESTOREFH",
1742		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1743	},
1744	[OP_SAVEFH] = {
1745		.op_func = (nfsd4op_func)nfsd4_savefh,
1746		.op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1747		.op_name = "OP_SAVEFH",
1748		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1749	},
1750	[OP_SECINFO] = {
1751		.op_func = (nfsd4op_func)nfsd4_secinfo,
 
1752		.op_flags = OP_HANDLES_WRONGSEC,
1753		.op_name = "OP_SECINFO",
 
1754	},
1755	[OP_SETATTR] = {
1756		.op_func = (nfsd4op_func)nfsd4_setattr,
1757		.op_name = "OP_SETATTR",
1758		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1759		.op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1760		.op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
 
1761	},
1762	[OP_SETCLIENTID] = {
1763		.op_func = (nfsd4op_func)nfsd4_setclientid,
1764		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1765				| OP_MODIFIES_SOMETHING | OP_CACHEME,
 
1766		.op_name = "OP_SETCLIENTID",
1767		.op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1768	},
1769	[OP_SETCLIENTID_CONFIRM] = {
1770		.op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1771		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1772				| OP_MODIFIES_SOMETHING | OP_CACHEME,
1773		.op_name = "OP_SETCLIENTID_CONFIRM",
1774		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1775	},
1776	[OP_VERIFY] = {
1777		.op_func = (nfsd4op_func)nfsd4_verify,
1778		.op_name = "OP_VERIFY",
 
1779	},
1780	[OP_WRITE] = {
1781		.op_func = (nfsd4op_func)nfsd4_write,
1782		.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1783		.op_name = "OP_WRITE",
1784		.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1785		.op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1786	},
1787	[OP_RELEASE_LOCKOWNER] = {
1788		.op_func = (nfsd4op_func)nfsd4_release_lockowner,
1789		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1790				| OP_MODIFIES_SOMETHING,
1791		.op_name = "OP_RELEASE_LOCKOWNER",
1792		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1793	},
1794
1795	/* NFSv4.1 operations */
1796	[OP_EXCHANGE_ID] = {
1797		.op_func = (nfsd4op_func)nfsd4_exchange_id,
1798		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1799				| OP_MODIFIES_SOMETHING,
1800		.op_name = "OP_EXCHANGE_ID",
1801		.op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1802	},
1803	[OP_BACKCHANNEL_CTL] = {
1804		.op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1805		.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1806		.op_name = "OP_BACKCHANNEL_CTL",
1807		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1808	},
1809	[OP_BIND_CONN_TO_SESSION] = {
1810		.op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1811		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1812				| OP_MODIFIES_SOMETHING,
1813		.op_name = "OP_BIND_CONN_TO_SESSION",
1814		.op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1815	},
1816	[OP_CREATE_SESSION] = {
1817		.op_func = (nfsd4op_func)nfsd4_create_session,
1818		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1819				| OP_MODIFIES_SOMETHING,
1820		.op_name = "OP_CREATE_SESSION",
1821		.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1822	},
1823	[OP_DESTROY_SESSION] = {
1824		.op_func = (nfsd4op_func)nfsd4_destroy_session,
1825		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1826				| OP_MODIFIES_SOMETHING,
1827		.op_name = "OP_DESTROY_SESSION",
1828		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1829	},
1830	[OP_SEQUENCE] = {
1831		.op_func = (nfsd4op_func)nfsd4_sequence,
1832		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1833		.op_name = "OP_SEQUENCE",
 
1834	},
1835	[OP_DESTROY_CLIENTID] = {
1836		.op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1837		.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1838				| OP_MODIFIES_SOMETHING,
1839		.op_name = "OP_DESTROY_CLIENTID",
1840		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1841	},
1842	[OP_RECLAIM_COMPLETE] = {
1843		.op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1844		.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1845		.op_name = "OP_RECLAIM_COMPLETE",
1846		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1847	},
1848	[OP_SECINFO_NO_NAME] = {
1849		.op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
 
1850		.op_flags = OP_HANDLES_WRONGSEC,
1851		.op_name = "OP_SECINFO_NO_NAME",
 
1852	},
1853	[OP_TEST_STATEID] = {
1854		.op_func = (nfsd4op_func)nfsd4_test_stateid,
1855		.op_flags = ALLOWED_WITHOUT_FH,
1856		.op_name = "OP_TEST_STATEID",
 
1857	},
1858	[OP_FREE_STATEID] = {
1859		.op_func = (nfsd4op_func)nfsd4_free_stateid,
1860		.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1861		.op_name = "OP_FREE_STATEID",
1862		.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1863		.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1864	},
1865};
1866
1867#ifdef NFSD_DEBUG
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1868static const char *nfsd4_op_name(unsigned opnum)
1869{
1870	if (opnum < ARRAY_SIZE(nfsd4_ops))
1871		return nfsd4_ops[opnum].op_name;
1872	return "unknown_operation";
1873}
1874#endif
1875
1876#define nfsd4_voidres			nfsd4_voidargs
1877struct nfsd4_voidargs { int dummy; };
1878
1879static struct svc_procedure		nfsd_procedures4[2] = {
1880	[NFSPROC4_NULL] = {
1881		.pc_func = (svc_procfunc) nfsd4_proc_null,
1882		.pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1883		.pc_argsize = sizeof(struct nfsd4_voidargs),
1884		.pc_ressize = sizeof(struct nfsd4_voidres),
 
1885		.pc_cachetype = RC_NOCACHE,
1886		.pc_xdrressize = 1,
 
1887	},
1888	[NFSPROC4_COMPOUND] = {
1889		.pc_func = (svc_procfunc) nfsd4_proc_compound,
1890		.pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1891		.pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1892		.pc_argsize = sizeof(struct nfsd4_compoundargs),
1893		.pc_ressize = sizeof(struct nfsd4_compoundres),
1894		.pc_release = nfsd4_release_compoundargs,
1895		.pc_cachetype = RC_NOCACHE,
1896		.pc_xdrressize = NFSD_BUFSIZE/4,
 
1897	},
1898};
1899
1900struct svc_version	nfsd_version4 = {
1901		.vs_vers	= 4,
1902		.vs_nproc	= 2,
1903		.vs_proc	= nfsd_procedures4,
1904		.vs_dispatch	= nfsd_dispatch,
1905		.vs_xdrsize	= NFS4_SVC_XDRSIZE,
1906		.vs_rpcb_optnl	= 1,
 
 
 
1907};
1908
1909/*
1910 * Local variables:
1911 *  c-basic-offset: 8
1912 * End:
1913 */