nfs4proc.c 137.9 KB
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/*
 *  fs/nfs/nfs4proc.c
 *
 *  Client-side procedure declarations for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/namei.h>
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#include <linux/mount.h>
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#include <linux/module.h>
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#include <linux/sunrpc/bc_xprt.h>
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#include "nfs4_fs.h"
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#include "delegation.h"
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#include "internal.h"
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#include "iostat.h"
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#include "callback.h"
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#define NFSDBG_FACILITY		NFSDBG_PROC

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#define NFS4_POLL_RETRY_MIN	(HZ/10)
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#define NFS4_POLL_RETRY_MAX	(15*HZ)

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#define NFS4_MAX_LOOP_ON_RECOVER (10)

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struct nfs4_opendata;
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static int _nfs4_proc_open(struct nfs4_opendata *data);
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static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
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static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
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static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
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/* Prevent leaks of NFSv4 errors into userland */
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static int nfs4_map_errors(int err)
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{
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	if (err >= -1000)
		return err;
	switch (err) {
	case -NFS4ERR_RESOURCE:
		return -EREMOTEIO;
	default:
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		dprintk("%s could not handle NFSv4 error %d\n",
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				__func__, -err);
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		break;
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	}
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	return -EIO;
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}

/*
 * This is our standard bitmap for GETATTR requests.
 */
const u32 nfs4_fattr_bitmap[2] = {
	FATTR4_WORD0_TYPE
	| FATTR4_WORD0_CHANGE
	| FATTR4_WORD0_SIZE
	| FATTR4_WORD0_FSID
	| FATTR4_WORD0_FILEID,
	FATTR4_WORD1_MODE
	| FATTR4_WORD1_NUMLINKS
	| FATTR4_WORD1_OWNER
	| FATTR4_WORD1_OWNER_GROUP
	| FATTR4_WORD1_RAWDEV
	| FATTR4_WORD1_SPACE_USED
	| FATTR4_WORD1_TIME_ACCESS
	| FATTR4_WORD1_TIME_METADATA
	| FATTR4_WORD1_TIME_MODIFY
};

const u32 nfs4_statfs_bitmap[2] = {
	FATTR4_WORD0_FILES_AVAIL
	| FATTR4_WORD0_FILES_FREE
	| FATTR4_WORD0_FILES_TOTAL,
	FATTR4_WORD1_SPACE_AVAIL
	| FATTR4_WORD1_SPACE_FREE
	| FATTR4_WORD1_SPACE_TOTAL
};

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const u32 nfs4_pathconf_bitmap[2] = {
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	FATTR4_WORD0_MAXLINK
	| FATTR4_WORD0_MAXNAME,
	0
};

const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
			| FATTR4_WORD0_MAXREAD
			| FATTR4_WORD0_MAXWRITE
			| FATTR4_WORD0_LEASE_TIME,
			0
};

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const u32 nfs4_fs_locations_bitmap[2] = {
	FATTR4_WORD0_TYPE
	| FATTR4_WORD0_CHANGE
	| FATTR4_WORD0_SIZE
	| FATTR4_WORD0_FSID
	| FATTR4_WORD0_FILEID
	| FATTR4_WORD0_FS_LOCATIONS,
	FATTR4_WORD1_MODE
	| FATTR4_WORD1_NUMLINKS
	| FATTR4_WORD1_OWNER
	| FATTR4_WORD1_OWNER_GROUP
	| FATTR4_WORD1_RAWDEV
	| FATTR4_WORD1_SPACE_USED
	| FATTR4_WORD1_TIME_ACCESS
	| FATTR4_WORD1_TIME_METADATA
	| FATTR4_WORD1_TIME_MODIFY
	| FATTR4_WORD1_MOUNTED_ON_FILEID
};

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static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
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		struct nfs4_readdir_arg *readdir)
{
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	__be32 *start, *p;
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	BUG_ON(readdir->count < 80);
	if (cookie > 2) {
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		readdir->cookie = cookie;
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		memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
		return;
	}

	readdir->cookie = 0;
	memset(&readdir->verifier, 0, sizeof(readdir->verifier));
	if (cookie == 2)
		return;
	
	/*
	 * NFSv4 servers do not return entries for '.' and '..'
	 * Therefore, we fake these entries here.  We let '.'
	 * have cookie 0 and '..' have cookie 1.  Note that
	 * when talking to the server, we always send cookie 0
	 * instead of 1 or 2.
	 */
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	start = p = kmap_atomic(*readdir->pages, KM_USER0);
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	if (cookie == 0) {
		*p++ = xdr_one;                                  /* next */
		*p++ = xdr_zero;                   /* cookie, first word */
		*p++ = xdr_one;                   /* cookie, second word */
		*p++ = xdr_one;                             /* entry len */
		memcpy(p, ".\0\0\0", 4);                        /* entry */
		p++;
		*p++ = xdr_one;                         /* bitmap length */
		*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
		*p++ = htonl(8);              /* attribute buffer length */
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		p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
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	}
	
	*p++ = xdr_one;                                  /* next */
	*p++ = xdr_zero;                   /* cookie, first word */
	*p++ = xdr_two;                   /* cookie, second word */
	*p++ = xdr_two;                             /* entry len */
	memcpy(p, "..\0\0", 4);                         /* entry */
	p++;
	*p++ = xdr_one;                         /* bitmap length */
	*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
	*p++ = htonl(8);              /* attribute buffer length */
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	p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
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	readdir->pgbase = (char *)p - (char *)start;
	readdir->count -= readdir->pgbase;
	kunmap_atomic(start, KM_USER0);
}

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static int nfs4_wait_clnt_recover(struct nfs_client *clp)
{
	int res;

	might_sleep();

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	res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
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			nfs_wait_bit_killable, TASK_KILLABLE);
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	return res;
}

static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
{
	int res = 0;

	might_sleep();

	if (*timeout <= 0)
		*timeout = NFS4_POLL_RETRY_MIN;
	if (*timeout > NFS4_POLL_RETRY_MAX)
		*timeout = NFS4_POLL_RETRY_MAX;
	schedule_timeout_killable(*timeout);
	if (fatal_signal_pending(current))
		res = -ERESTARTSYS;
	*timeout <<= 1;
	return res;
}

/* This is the error handling routine for processes that are allowed
 * to sleep.
 */
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
	struct nfs_client *clp = server->nfs_client;
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	struct nfs4_state *state = exception->state;
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	int ret = errorcode;

	exception->retry = 0;
	switch(errorcode) {
		case 0:
			return 0;
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		case -NFS4ERR_ADMIN_REVOKED:
		case -NFS4ERR_BAD_STATEID:
		case -NFS4ERR_OPENMODE:
			if (state == NULL)
				break;
			nfs4_state_mark_reclaim_nograce(clp, state);
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		case -NFS4ERR_STALE_CLIENTID:
		case -NFS4ERR_STALE_STATEID:
		case -NFS4ERR_EXPIRED:
			nfs4_schedule_state_recovery(clp);
			ret = nfs4_wait_clnt_recover(clp);
			if (ret == 0)
				exception->retry = 1;
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#if !defined(CONFIG_NFS_V4_1)
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			break;
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#else /* !defined(CONFIG_NFS_V4_1) */
			if (!nfs4_has_session(server->nfs_client))
				break;
			/* FALLTHROUGH */
		case -NFS4ERR_BADSESSION:
		case -NFS4ERR_BADSLOT:
		case -NFS4ERR_BAD_HIGH_SLOT:
		case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
		case -NFS4ERR_DEADSESSION:
		case -NFS4ERR_SEQ_FALSE_RETRY:
		case -NFS4ERR_SEQ_MISORDERED:
			dprintk("%s ERROR: %d Reset session\n", __func__,
				errorcode);
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			nfs4_schedule_state_recovery(clp);
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			exception->retry = 1;
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			break;
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#endif /* !defined(CONFIG_NFS_V4_1) */
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		case -NFS4ERR_FILE_OPEN:
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			if (exception->timeout > HZ) {
				/* We have retried a decent amount, time to
				 * fail
				 */
				ret = -EBUSY;
				break;
			}
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		case -NFS4ERR_GRACE:
		case -NFS4ERR_DELAY:
			ret = nfs4_delay(server->client, &exception->timeout);
			if (ret != 0)
				break;
		case -NFS4ERR_OLD_STATEID:
			exception->retry = 1;
	}
	/* We failed to handle the error */
	return nfs4_map_errors(ret);
}


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static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
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{
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	struct nfs_client *clp = server->nfs_client;
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	spin_lock(&clp->cl_lock);
	if (time_before(clp->cl_last_renewal,timestamp))
		clp->cl_last_renewal = timestamp;
	spin_unlock(&clp->cl_lock);
}

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#if defined(CONFIG_NFS_V4_1)

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/*
 * nfs4_free_slot - free a slot and efficiently update slot table.
 *
 * freeing a slot is trivially done by clearing its respective bit
 * in the bitmap.
 * If the freed slotid equals highest_used_slotid we want to update it
 * so that the server would be able to size down the slot table if needed,
 * otherwise we know that the highest_used_slotid is still in use.
 * When updating highest_used_slotid there may be "holes" in the bitmap
 * so we need to scan down from highest_used_slotid to 0 looking for the now
 * highest slotid in use.
 * If none found, highest_used_slotid is set to -1.
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 *
 * Must be called while holding tbl->slot_tbl_lock
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 */
static void
nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
{
	int slotid = free_slotid;

	/* clear used bit in bitmap */
	__clear_bit(slotid, tbl->used_slots);

	/* update highest_used_slotid when it is freed */
	if (slotid == tbl->highest_used_slotid) {
		slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
		if (slotid >= 0 && slotid < tbl->max_slots)
			tbl->highest_used_slotid = slotid;
		else
			tbl->highest_used_slotid = -1;
	}
	dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
		free_slotid, tbl->highest_used_slotid);
}

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static void nfs41_sequence_free_slot(const struct nfs_client *clp,
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			      struct nfs4_sequence_res *res)
{
	struct nfs4_slot_table *tbl;

	tbl = &clp->cl_session->fc_slot_table;
	if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
		/* just wake up the next guy waiting since
		 * we may have not consumed a slot after all */
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		dprintk("%s: No slot\n", __func__);
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		return;
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	}
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	spin_lock(&tbl->slot_tbl_lock);
	nfs4_free_slot(tbl, res->sr_slotid);

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	/* Signal state manager thread if session is drained */
	if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
		if (tbl->highest_used_slotid == -1) {
			dprintk("%s COMPLETE: Session Drained\n", __func__);
			complete(&clp->cl_session->complete);
		}
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	} else {
		rpc_wake_up_next(&tbl->slot_tbl_waitq);
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	}
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	spin_unlock(&tbl->slot_tbl_lock);
	res->sr_slotid = NFS4_MAX_SLOT_TABLE;
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}

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static void nfs41_sequence_done(struct nfs_client *clp,
				struct nfs4_sequence_res *res,
				int rpc_status)
{
	unsigned long timestamp;
	struct nfs4_slot_table *tbl;
	struct nfs4_slot *slot;

	/*
	 * sr_status remains 1 if an RPC level error occurred. The server
	 * may or may not have processed the sequence operation..
	 * Proceed as if the server received and processed the sequence
	 * operation.
	 */
	if (res->sr_status == 1)
		res->sr_status = NFS_OK;

	/* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
	if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
		goto out;

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	/* Check the SEQUENCE operation status */
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	if (res->sr_status == 0) {
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		tbl = &clp->cl_session->fc_slot_table;
		slot = tbl->slots + res->sr_slotid;
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		/* Update the slot's sequence and clientid lease timer */
		++slot->seq_nr;
		timestamp = res->sr_renewal_time;
		spin_lock(&clp->cl_lock);
		if (time_before(clp->cl_last_renewal, timestamp))
			clp->cl_last_renewal = timestamp;
		spin_unlock(&clp->cl_lock);
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		/* Check sequence flags */
		nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
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	}
out:
	/* The session may be reset by one of the error handlers. */
	dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
	nfs41_sequence_free_slot(clp, res);
}

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/*
 * nfs4_find_slot - efficiently look for a free slot
 *
 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
 * If found, we mark the slot as used, update the highest_used_slotid,
 * and respectively set up the sequence operation args.
 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
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 *
 * Note: must be called with under the slot_tbl_lock.
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 */
static u8
nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
{
	int slotid;
	u8 ret_id = NFS4_MAX_SLOT_TABLE;
	BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);

	dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
		__func__, tbl->used_slots[0], tbl->highest_used_slotid,
		tbl->max_slots);
	slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
	if (slotid >= tbl->max_slots)
		goto out;
	__set_bit(slotid, tbl->used_slots);
	if (slotid > tbl->highest_used_slotid)
		tbl->highest_used_slotid = slotid;
	ret_id = slotid;
out:
	dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
		__func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
	return ret_id;
}

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static int nfs41_setup_sequence(struct nfs4_session *session,
				struct nfs4_sequence_args *args,
				struct nfs4_sequence_res *res,
				int cache_reply,
				struct rpc_task *task)
{
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	struct nfs4_slot *slot;
	struct nfs4_slot_table *tbl;
	u8 slotid;

	dprintk("--> %s\n", __func__);
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	/* slot already allocated? */
	if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
		return 0;

	memset(res, 0, sizeof(*res));
	res->sr_slotid = NFS4_MAX_SLOT_TABLE;
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	tbl = &session->fc_slot_table;

	spin_lock(&tbl->slot_tbl_lock);
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	if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
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		/*
		 * The state manager will wait until the slot table is empty.
		 * Schedule the reset thread
		 */
		dprintk("%s Schedule Session Reset\n", __func__);
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		rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
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		spin_unlock(&tbl->slot_tbl_lock);
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		return -EAGAIN;
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	}

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	slotid = nfs4_find_slot(tbl, task);
	if (slotid == NFS4_MAX_SLOT_TABLE) {
		rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
		spin_unlock(&tbl->slot_tbl_lock);
		dprintk("<-- %s: no free slots\n", __func__);
		return -EAGAIN;
	}
	spin_unlock(&tbl->slot_tbl_lock);

	slot = tbl->slots + slotid;
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	args->sa_session = session;
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	args->sa_slotid = slotid;
	args->sa_cache_this = cache_reply;

	dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);

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	res->sr_session = session;
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	res->sr_slotid = slotid;
	res->sr_renewal_time = jiffies;
	/*
	 * sr_status is only set in decode_sequence, and so will remain
	 * set to 1 if an rpc level failure occurs.
	 */
	res->sr_status = 1;
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	return 0;
}

int nfs4_setup_sequence(struct nfs_client *clp,
			struct nfs4_sequence_args *args,
			struct nfs4_sequence_res *res,
			int cache_reply,
			struct rpc_task *task)
{
	int ret = 0;

	dprintk("--> %s clp %p session %p sr_slotid %d\n",
		__func__, clp, clp->cl_session, res->sr_slotid);

	if (!nfs4_has_session(clp))
		goto out;
	ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
				   task);
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	if (ret && ret != -EAGAIN) {
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		/* terminate rpc task */
		task->tk_status = ret;
		task->tk_action = NULL;
	}
out:
	dprintk("<-- %s status=%d\n", __func__, ret);
	return ret;
}

struct nfs41_call_sync_data {
	struct nfs_client *clp;
	struct nfs4_sequence_args *seq_args;
	struct nfs4_sequence_res *seq_res;
	int cache_reply;
};

static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs41_call_sync_data *data = calldata;

	dprintk("--> %s data->clp->cl_session %p\n", __func__,
		data->clp->cl_session);
	if (nfs4_setup_sequence(data->clp, data->seq_args,
				data->seq_res, data->cache_reply, task))
		return;
	rpc_call_start(task);
}

A
Andy Adamson 已提交
549 550 551 552 553 554 555
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
{
	struct nfs41_call_sync_data *data = calldata;

	nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
}

A
Andy Adamson 已提交
556 557
struct rpc_call_ops nfs41_call_sync_ops = {
	.rpc_call_prepare = nfs41_call_sync_prepare,
A
Andy Adamson 已提交
558
	.rpc_call_done = nfs41_call_sync_done,
A
Andy Adamson 已提交
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593
};

static int nfs4_call_sync_sequence(struct nfs_client *clp,
				   struct rpc_clnt *clnt,
				   struct rpc_message *msg,
				   struct nfs4_sequence_args *args,
				   struct nfs4_sequence_res *res,
				   int cache_reply)
{
	int ret;
	struct rpc_task *task;
	struct nfs41_call_sync_data data = {
		.clp = clp,
		.seq_args = args,
		.seq_res = res,
		.cache_reply = cache_reply,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = clnt,
		.rpc_message = msg,
		.callback_ops = &nfs41_call_sync_ops,
		.callback_data = &data
	};

	res->sr_slotid = NFS4_MAX_SLOT_TABLE;
	task = rpc_run_task(&task_setup);
	if (IS_ERR(task))
		ret = PTR_ERR(task);
	else {
		ret = task->tk_status;
		rpc_put_task(task);
	}
	return ret;
}

A
Andy Adamson 已提交
594 595 596 597 598 599
int _nfs4_call_sync_session(struct nfs_server *server,
			    struct rpc_message *msg,
			    struct nfs4_sequence_args *args,
			    struct nfs4_sequence_res *res,
			    int cache_reply)
{
A
Andy Adamson 已提交
600 601
	return nfs4_call_sync_sequence(server->nfs_client, server->client,
				       msg, args, res, cache_reply);
A
Andy Adamson 已提交
602 603 604 605 606 607 608 609 610 611
}

#endif /* CONFIG_NFS_V4_1 */

int _nfs4_call_sync(struct nfs_server *server,
		    struct rpc_message *msg,
		    struct nfs4_sequence_args *args,
		    struct nfs4_sequence_res *res,
		    int cache_reply)
{
612
	args->sa_session = res->sr_session = NULL;
A
Andy Adamson 已提交
613 614 615 616 617 618 619
	return rpc_call_sync(server->client, msg, 0);
}

#define nfs4_call_sync(server, msg, args, res, cache_reply) \
	(server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
			&(res)->seq_res, (cache_reply))

A
Andy Adamson 已提交
620 621 622 623 624 625 626 627 628
static void nfs4_sequence_done(const struct nfs_server *server,
			       struct nfs4_sequence_res *res, int rpc_status)
{
#ifdef CONFIG_NFS_V4_1
	if (nfs4_has_session(server->nfs_client))
		nfs41_sequence_done(server->nfs_client, res, rpc_status);
#endif /* CONFIG_NFS_V4_1 */
}

629
void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp)
630 631 632 633 634 635 636 637 638 639
{
#ifdef CONFIG_NFS_V4_1
	if (nfs4_has_session(clp)) {
		rpc_restart_call_prepare(task);
		return;
	}
#endif /* CONFIG_NFS_V4_1 */
	rpc_restart_call(task);
}

640
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
L
Linus Torvalds 已提交
641
{
642
	struct nfs_inode *nfsi = NFS_I(dir);
L
Linus Torvalds 已提交
643

644
	spin_lock(&dir->i_lock);
645 646
	nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
	if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
647
		nfs_force_lookup_revalidate(dir);
648
	nfsi->change_attr = cinfo->after;
649
	spin_unlock(&dir->i_lock);
L
Linus Torvalds 已提交
650 651
}

652
struct nfs4_opendata {
653
	struct kref kref;
654 655
	struct nfs_openargs o_arg;
	struct nfs_openres o_res;
656 657
	struct nfs_open_confirmargs c_arg;
	struct nfs_open_confirmres c_res;
658 659
	struct nfs_fattr f_attr;
	struct nfs_fattr dir_attr;
660
	struct path path;
661 662
	struct dentry *dir;
	struct nfs4_state_owner *owner;
663
	struct nfs4_state *state;
664
	struct iattr attrs;
665
	unsigned long timestamp;
666
	unsigned int rpc_done : 1;
667 668
	int rpc_status;
	int cancelled;
669 670
};

671 672 673 674 675

static void nfs4_init_opendata_res(struct nfs4_opendata *p)
{
	p->o_res.f_attr = &p->f_attr;
	p->o_res.dir_attr = &p->dir_attr;
676 677
	p->o_res.seqid = p->o_arg.seqid;
	p->c_res.seqid = p->c_arg.seqid;
678 679 680
	p->o_res.server = p->o_arg.server;
	nfs_fattr_init(&p->f_attr);
	nfs_fattr_init(&p->dir_attr);
681
	p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
682 683
}

684
static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
685
		struct nfs4_state_owner *sp, fmode_t fmode, int flags,
686 687
		const struct iattr *attrs)
{
688
	struct dentry *parent = dget_parent(path->dentry);
689 690 691 692 693 694 695 696 697 698
	struct inode *dir = parent->d_inode;
	struct nfs_server *server = NFS_SERVER(dir);
	struct nfs4_opendata *p;

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (p == NULL)
		goto err;
	p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
	if (p->o_arg.seqid == NULL)
		goto err_free;
699 700
	p->path.mnt = mntget(path->mnt);
	p->path.dentry = dget(path->dentry);
701 702 703 704
	p->dir = parent;
	p->owner = sp;
	atomic_inc(&sp->so_count);
	p->o_arg.fh = NFS_FH(dir);
705 706
	p->o_arg.open_flags = flags;
	p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
707
	p->o_arg.clientid = server->nfs_client->cl_clientid;
708
	p->o_arg.id = sp->so_owner_id.id;
709
	p->o_arg.name = &p->path.dentry->d_name;
710 711 712 713
	p->o_arg.server = server;
	p->o_arg.bitmask = server->attr_bitmask;
	p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
	if (flags & O_EXCL) {
714 715 716 717 718 719 720 721 722
		if (nfs4_has_persistent_session(server->nfs_client)) {
			/* GUARDED */
			p->o_arg.u.attrs = &p->attrs;
			memcpy(&p->attrs, attrs, sizeof(p->attrs));
		} else { /* EXCLUSIVE4_1 */
			u32 *s = (u32 *) p->o_arg.u.verifier.data;
			s[0] = jiffies;
			s[1] = current->pid;
		}
723 724 725 726
	} else if (flags & O_CREAT) {
		p->o_arg.u.attrs = &p->attrs;
		memcpy(&p->attrs, attrs, sizeof(p->attrs));
	}
727 728 729
	p->c_arg.fh = &p->o_res.fh;
	p->c_arg.stateid = &p->o_res.stateid;
	p->c_arg.seqid = p->o_arg.seqid;
730
	nfs4_init_opendata_res(p);
731
	kref_init(&p->kref);
732 733 734 735 736 737 738 739
	return p;
err_free:
	kfree(p);
err:
	dput(parent);
	return NULL;
}

740
static void nfs4_opendata_free(struct kref *kref)
741
{
742 743 744 745
	struct nfs4_opendata *p = container_of(kref,
			struct nfs4_opendata, kref);

	nfs_free_seqid(p->o_arg.seqid);
746 747
	if (p->state != NULL)
		nfs4_put_open_state(p->state);
748 749
	nfs4_put_state_owner(p->owner);
	dput(p->dir);
J
Jan Blunck 已提交
750
	path_put(&p->path);
751 752 753 754 755 756 757
	kfree(p);
}

static void nfs4_opendata_put(struct nfs4_opendata *p)
{
	if (p != NULL)
		kref_put(&p->kref, nfs4_opendata_free);
758 759
}

760 761 762 763 764 765 766 767
static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
{
	int ret;

	ret = rpc_wait_for_completion_task(task);
	return ret;
}

768
static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
769 770
{
	int ret = 0;
771 772 773 774

	if (open_mode & O_EXCL)
		goto out;
	switch (mode & (FMODE_READ|FMODE_WRITE)) {
775 776 777 778 779 780 781 782 783
		case FMODE_READ:
			ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
			break;
		case FMODE_WRITE:
			ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
			break;
		case FMODE_READ|FMODE_WRITE:
			ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
	}
784
out:
785 786 787
	return ret;
}

788
static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
789
{
790
	if ((delegation->type & fmode) != fmode)
791
		return 0;
792
	if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
793
		return 0;
794
	nfs_mark_delegation_referenced(delegation);
795 796 797
	return 1;
}

798
static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
799
{
800
	switch (fmode) {
801 802 803 804 805 806 807 808 809
		case FMODE_WRITE:
			state->n_wronly++;
			break;
		case FMODE_READ:
			state->n_rdonly++;
			break;
		case FMODE_READ|FMODE_WRITE:
			state->n_rdwr++;
	}
810
	nfs4_state_set_mode_locked(state, state->state | fmode);
811 812
}

813
static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
814 815 816 817
{
	if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
		memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
	memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
818
	switch (fmode) {
819 820 821 822 823 824 825 826 827
		case FMODE_READ:
			set_bit(NFS_O_RDONLY_STATE, &state->flags);
			break;
		case FMODE_WRITE:
			set_bit(NFS_O_WRONLY_STATE, &state->flags);
			break;
		case FMODE_READ|FMODE_WRITE:
			set_bit(NFS_O_RDWR_STATE, &state->flags);
	}
828 829
}

830
static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
831
{
832
	write_seqlock(&state->seqlock);
833
	nfs_set_open_stateid_locked(state, stateid, fmode);
834
	write_sequnlock(&state->seqlock);
835 836
}

837
static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
L
Linus Torvalds 已提交
838
{
839 840 841 842 843
	/*
	 * Protect the call to nfs4_state_set_mode_locked and
	 * serialise the stateid update
	 */
	write_seqlock(&state->seqlock);
844 845 846 847 848
	if (deleg_stateid != NULL) {
		memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
		set_bit(NFS_DELEGATED_STATE, &state->flags);
	}
	if (open_stateid != NULL)
849
		nfs_set_open_stateid_locked(state, open_stateid, fmode);
850 851
	write_sequnlock(&state->seqlock);
	spin_lock(&state->owner->so_lock);
852
	update_open_stateflags(state, fmode);
853
	spin_unlock(&state->owner->so_lock);
L
Linus Torvalds 已提交
854 855
}

856
static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
857 858 859 860 861
{
	struct nfs_inode *nfsi = NFS_I(state->inode);
	struct nfs_delegation *deleg_cur;
	int ret = 0;

862
	fmode &= (FMODE_READ|FMODE_WRITE);
863 864 865 866 867 868 869 870

	rcu_read_lock();
	deleg_cur = rcu_dereference(nfsi->delegation);
	if (deleg_cur == NULL)
		goto no_delegation;

	spin_lock(&deleg_cur->lock);
	if (nfsi->delegation != deleg_cur ||
871
	    (deleg_cur->type & fmode) != fmode)
872 873 874 875 876 877 878
		goto no_delegation_unlock;

	if (delegation == NULL)
		delegation = &deleg_cur->stateid;
	else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
		goto no_delegation_unlock;

879
	nfs_mark_delegation_referenced(deleg_cur);
880
	__update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
881 882 883 884 885 886 887
	ret = 1;
no_delegation_unlock:
	spin_unlock(&deleg_cur->lock);
no_delegation:
	rcu_read_unlock();

	if (!ret && open_stateid != NULL) {
888
		__update_open_stateid(state, open_stateid, NULL, fmode);
889 890 891 892 893 894 895
		ret = 1;
	}

	return ret;
}


896
static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
897 898 899 900 901
{
	struct nfs_delegation *delegation;

	rcu_read_lock();
	delegation = rcu_dereference(NFS_I(inode)->delegation);
902
	if (delegation == NULL || (delegation->type & fmode) == fmode) {
903 904 905 906 907 908 909
		rcu_read_unlock();
		return;
	}
	rcu_read_unlock();
	nfs_inode_return_delegation(inode);
}

910
static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
911 912 913 914
{
	struct nfs4_state *state = opendata->state;
	struct nfs_inode *nfsi = NFS_I(state->inode);
	struct nfs_delegation *delegation;
915 916
	int open_mode = opendata->o_arg.open_flags & O_EXCL;
	fmode_t fmode = opendata->o_arg.fmode;
917 918 919 920
	nfs4_stateid stateid;
	int ret = -EAGAIN;

	for (;;) {
921
		if (can_open_cached(state, fmode, open_mode)) {
922
			spin_lock(&state->owner->so_lock);
923 924
			if (can_open_cached(state, fmode, open_mode)) {
				update_open_stateflags(state, fmode);
925 926 927 928 929
				spin_unlock(&state->owner->so_lock);
				goto out_return_state;
			}
			spin_unlock(&state->owner->so_lock);
		}
930 931 932
		rcu_read_lock();
		delegation = rcu_dereference(nfsi->delegation);
		if (delegation == NULL ||
933
		    !can_open_delegated(delegation, fmode)) {
934
			rcu_read_unlock();
935
			break;
936
		}
937 938 939
		/* Save the delegation */
		memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
		rcu_read_unlock();
940
		ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
941 942 943
		if (ret != 0)
			goto out;
		ret = -EAGAIN;
944 945

		/* Try to update the stateid using the delegation */
946
		if (update_open_stateid(state, NULL, &stateid, fmode))
947
			goto out_return_state;
948 949 950 951 952 953 954 955
	}
out:
	return ERR_PTR(ret);
out_return_state:
	atomic_inc(&state->count);
	return state;
}

956 957 958 959
static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
{
	struct inode *inode;
	struct nfs4_state *state = NULL;
960
	struct nfs_delegation *delegation;
961
	int ret;
962

963
	if (!data->rpc_done) {
964
		state = nfs4_try_open_cached(data);
965 966 967
		goto out;
	}

968
	ret = -EAGAIN;
969
	if (!(data->f_attr.valid & NFS_ATTR_FATTR))
970
		goto err;
971
	inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
972
	ret = PTR_ERR(inode);
973
	if (IS_ERR(inode))
974 975
		goto err;
	ret = -ENOMEM;
976 977
	state = nfs4_get_open_state(inode, data->owner);
	if (state == NULL)
978
		goto err_put_inode;
979 980 981
	if (data->o_res.delegation_type != 0) {
		int delegation_flags = 0;

982 983 984 985 986
		rcu_read_lock();
		delegation = rcu_dereference(NFS_I(inode)->delegation);
		if (delegation)
			delegation_flags = delegation->flags;
		rcu_read_unlock();
987
		if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
988 989 990 991 992 993 994 995
			nfs_inode_set_delegation(state->inode,
					data->owner->so_cred,
					&data->o_res);
		else
			nfs_inode_reclaim_delegation(state->inode,
					data->owner->so_cred,
					&data->o_res);
	}
996 997

	update_open_stateid(state, &data->o_res.stateid, NULL,
998
			data->o_arg.fmode);
999
	iput(inode);
1000
out:
1001
	return state;
1002 1003 1004 1005
err_put_inode:
	iput(inode);
err:
	return ERR_PTR(ret);
1006 1007
}

1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
{
	struct nfs_inode *nfsi = NFS_I(state->inode);
	struct nfs_open_context *ctx;

	spin_lock(&state->inode->i_lock);
	list_for_each_entry(ctx, &nfsi->open_files, list) {
		if (ctx->state != state)
			continue;
		get_nfs_open_context(ctx);
		spin_unlock(&state->inode->i_lock);
		return ctx;
	}
	spin_unlock(&state->inode->i_lock);
	return ERR_PTR(-ENOENT);
}

T
Trond Myklebust 已提交
1025 1026 1027 1028
static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
{
	struct nfs4_opendata *opendata;

1029
	opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
T
Trond Myklebust 已提交
1030 1031 1032 1033 1034 1035 1036
	if (opendata == NULL)
		return ERR_PTR(-ENOMEM);
	opendata->state = state;
	atomic_inc(&state->count);
	return opendata;
}

1037
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1038
{
1039
	struct nfs4_state *newstate;
1040 1041
	int ret;

1042 1043
	opendata->o_arg.open_flags = 0;
	opendata->o_arg.fmode = fmode;
1044 1045 1046
	memset(&opendata->o_res, 0, sizeof(opendata->o_res));
	memset(&opendata->c_res, 0, sizeof(opendata->c_res));
	nfs4_init_opendata_res(opendata);
1047 1048 1049
	ret = _nfs4_proc_open(opendata);
	if (ret != 0)
		return ret; 
1050
	newstate = nfs4_opendata_to_nfs4_state(opendata);
1051 1052
	if (IS_ERR(newstate))
		return PTR_ERR(newstate);
1053
	nfs4_close_state(&opendata->path, newstate, fmode);
1054
	*res = newstate;
1055 1056 1057 1058 1059 1060 1061 1062 1063
	return 0;
}

static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
{
	struct nfs4_state *newstate;
	int ret;

	/* memory barrier prior to reading state->n_* */
1064
	clear_bit(NFS_DELEGATED_STATE, &state->flags);
1065 1066
	smp_rmb();
	if (state->n_rdwr != 0) {
1067
		ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1068 1069
		if (ret != 0)
			return ret;
1070 1071
		if (newstate != state)
			return -ESTALE;
1072 1073
	}
	if (state->n_wronly != 0) {
1074
		ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1075 1076
		if (ret != 0)
			return ret;
1077 1078
		if (newstate != state)
			return -ESTALE;
1079 1080
	}
	if (state->n_rdonly != 0) {
1081
		ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1082 1083
		if (ret != 0)
			return ret;
1084 1085
		if (newstate != state)
			return -ESTALE;
1086
	}
1087 1088 1089 1090 1091 1092
	/*
	 * We may have performed cached opens for all three recoveries.
	 * Check if we need to update the current stateid.
	 */
	if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
	    memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1093
		write_seqlock(&state->seqlock);
1094 1095
		if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
			memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1096
		write_sequnlock(&state->seqlock);
1097
	}
1098 1099 1100
	return 0;
}

L
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1101 1102 1103 1104
/*
 * OPEN_RECLAIM:
 * 	reclaim state on the server after a reboot.
 */
1105
static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
L
Linus Torvalds 已提交
1106
{
1107
	struct nfs_delegation *delegation;
1108
	struct nfs4_opendata *opendata;
1109
	fmode_t delegation_type = 0;
L
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1110 1111
	int status;

T
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1112 1113 1114
	opendata = nfs4_open_recoverdata_alloc(ctx, state);
	if (IS_ERR(opendata))
		return PTR_ERR(opendata);
1115 1116
	opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
	opendata->o_arg.fh = NFS_FH(state->inode);
1117 1118
	rcu_read_lock();
	delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1119
	if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1120
		delegation_type = delegation->type;
1121
	rcu_read_unlock();
1122 1123
	opendata->o_arg.u.delegation_type = delegation_type;
	status = nfs4_open_recover(opendata, state);
1124
	nfs4_opendata_put(opendata);
L
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1125 1126 1127
	return status;
}

1128
static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
L
Linus Torvalds 已提交
1129 1130 1131 1132 1133
{
	struct nfs_server *server = NFS_SERVER(state->inode);
	struct nfs4_exception exception = { };
	int err;
	do {
1134
		err = _nfs4_do_open_reclaim(ctx, state);
1135 1136 1137
		if (err != -NFS4ERR_DELAY)
			break;
		nfs4_handle_exception(server, err, &exception);
L
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1138 1139 1140 1141
	} while (exception.retry);
	return err;
}

1142 1143 1144 1145 1146 1147 1148 1149
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
	struct nfs_open_context *ctx;
	int ret;

	ctx = nfs4_state_find_open_context(state);
	if (IS_ERR(ctx))
		return PTR_ERR(ctx);
1150
	ret = nfs4_do_open_reclaim(ctx, state);
1151 1152 1153 1154
	put_nfs_open_context(ctx);
	return ret;
}

1155
static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
L
Linus Torvalds 已提交
1156
{
1157
	struct nfs4_opendata *opendata;
1158
	int ret;
L
Linus Torvalds 已提交
1159

T
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1160 1161 1162
	opendata = nfs4_open_recoverdata_alloc(ctx, state);
	if (IS_ERR(opendata))
		return PTR_ERR(opendata);
1163
	opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1164
	memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1165
			sizeof(opendata->o_arg.u.delegation.data));
1166
	ret = nfs4_open_recover(opendata, state);
1167
	nfs4_opendata_put(opendata);
1168
	return ret;
L
Linus Torvalds 已提交
1169 1170
}

1171
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
L
Linus Torvalds 已提交
1172 1173
{
	struct nfs4_exception exception = { };
1174
	struct nfs_server *server = NFS_SERVER(state->inode);
L
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1175 1176
	int err;
	do {
1177
		err = _nfs4_open_delegation_recall(ctx, state, stateid);
L
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1178 1179
		switch (err) {
			case 0:
1180 1181 1182
			case -ENOENT:
			case -ESTALE:
				goto out;
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1183 1184 1185 1186
			case -NFS4ERR_STALE_CLIENTID:
			case -NFS4ERR_STALE_STATEID:
			case -NFS4ERR_EXPIRED:
				/* Don't recall a delegation if it was lost */
1187
				nfs4_schedule_state_recovery(server->nfs_client);
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199
				goto out;
			case -ERESTARTSYS:
				/*
				 * The show must go on: exit, but mark the
				 * stateid as needing recovery.
				 */
			case -NFS4ERR_ADMIN_REVOKED:
			case -NFS4ERR_BAD_STATEID:
				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
			case -ENOMEM:
				err = 0;
				goto out;
L
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1200 1201 1202
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);
1203
out:
L
Linus Torvalds 已提交
1204 1205 1206
	return err;
}

1207 1208 1209 1210 1211 1212 1213
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
{
	struct nfs4_opendata *data = calldata;

	data->rpc_status = task->tk_status;
	if (RPC_ASSASSINATED(task))
		return;
1214
	if (data->rpc_status == 0) {
1215 1216
		memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
				sizeof(data->o_res.stateid.data));
1217
		nfs_confirm_seqid(&data->owner->so_seqid, 0);
1218
		renew_lease(data->o_res.server, data->timestamp);
1219
		data->rpc_done = 1;
1220
	}
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
}

static void nfs4_open_confirm_release(void *calldata)
{
	struct nfs4_opendata *data = calldata;
	struct nfs4_state *state = NULL;

	/* If this request hasn't been cancelled, do nothing */
	if (data->cancelled == 0)
		goto out_free;
	/* In case of error, no cleanup! */
1232
	if (!data->rpc_done)
1233 1234
		goto out_free;
	state = nfs4_opendata_to_nfs4_state(data);
1235
	if (!IS_ERR(state))
1236
		nfs4_close_state(&data->path, state, data->o_arg.fmode);
1237
out_free:
1238
	nfs4_opendata_put(data);
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
}

static const struct rpc_call_ops nfs4_open_confirm_ops = {
	.rpc_call_done = nfs4_open_confirm_done,
	.rpc_release = nfs4_open_confirm_release,
};

/*
 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
 */
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
{
	struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
	struct rpc_task *task;
1253 1254 1255 1256 1257 1258
	struct  rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
		.rpc_argp = &data->c_arg,
		.rpc_resp = &data->c_res,
		.rpc_cred = data->owner->so_cred,
	};
T
Trond Myklebust 已提交
1259 1260
	struct rpc_task_setup task_setup_data = {
		.rpc_client = server->client,
1261
		.rpc_message = &msg,
T
Trond Myklebust 已提交
1262 1263
		.callback_ops = &nfs4_open_confirm_ops,
		.callback_data = data,
1264
		.workqueue = nfsiod_workqueue,
T
Trond Myklebust 已提交
1265 1266
		.flags = RPC_TASK_ASYNC,
	};
L
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1267 1268
	int status;

1269
	kref_get(&data->kref);
1270 1271
	data->rpc_done = 0;
	data->rpc_status = 0;
1272
	data->timestamp = jiffies;
T
Trond Myklebust 已提交
1273
	task = rpc_run_task(&task_setup_data);
1274
	if (IS_ERR(task))
1275 1276 1277 1278 1279 1280 1281
		return PTR_ERR(task);
	status = nfs4_wait_for_completion_rpc_task(task);
	if (status != 0) {
		data->cancelled = 1;
		smp_wmb();
	} else
		status = data->rpc_status;
1282
	rpc_put_task(task);
L
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1283 1284 1285
	return status;
}

1286
static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
L
Linus Torvalds 已提交
1287
{
1288 1289
	struct nfs4_opendata *data = calldata;
	struct nfs4_state_owner *sp = data->owner;
1290

1291 1292
	if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
		return;
1293 1294 1295 1296 1297 1298 1299
	/*
	 * Check if we still need to send an OPEN call, or if we can use
	 * a delegation instead.
	 */
	if (data->state != NULL) {
		struct nfs_delegation *delegation;

1300
		if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1301
			goto out_no_action;
1302 1303 1304
		rcu_read_lock();
		delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
		if (delegation != NULL &&
1305
		    test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1306
			rcu_read_unlock();
1307
			goto out_no_action;
1308 1309 1310
		}
		rcu_read_unlock();
	}
1311
	/* Update sequence id. */
1312
	data->o_arg.id = sp->so_owner_id.id;
1313
	data->o_arg.clientid = sp->so_client->cl_clientid;
T
Trond Myklebust 已提交
1314
	if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1315
		task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
T
Trond Myklebust 已提交
1316 1317
		nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
	}
1318
	data->timestamp = jiffies;
1319 1320 1321 1322
	if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
				&data->o_arg.seq_args,
				&data->o_res.seq_res, 1, task))
		return;
1323
	rpc_call_start(task);
1324 1325 1326 1327
	return;
out_no_action:
	task->tk_action = NULL;

1328
}
L
Linus Torvalds 已提交
1329

1330 1331 1332
static void nfs4_open_done(struct rpc_task *task, void *calldata)
{
	struct nfs4_opendata *data = calldata;
L
Linus Torvalds 已提交
1333

1334
	data->rpc_status = task->tk_status;
1335

1336 1337
	nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
			task->tk_status);
1338

1339 1340 1341 1342
	if (RPC_ASSASSINATED(task))
		return;
	if (task->tk_status == 0) {
		switch (data->o_res.f_attr->mode & S_IFMT) {
1343 1344 1345
			case S_IFREG:
				break;
			case S_IFLNK:
1346
				data->rpc_status = -ELOOP;
1347 1348
				break;
			case S_IFDIR:
1349
				data->rpc_status = -EISDIR;
1350 1351
				break;
			default:
1352
				data->rpc_status = -ENOTDIR;
1353
		}
1354
		renew_lease(data->o_res.server, data->timestamp);
1355 1356
		if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
			nfs_confirm_seqid(&data->owner->so_seqid, 0);
1357
	}
1358
	data->rpc_done = 1;
1359
}
1360

1361 1362 1363 1364 1365 1366 1367 1368 1369
static void nfs4_open_release(void *calldata)
{
	struct nfs4_opendata *data = calldata;
	struct nfs4_state *state = NULL;

	/* If this request hasn't been cancelled, do nothing */
	if (data->cancelled == 0)
		goto out_free;
	/* In case of error, no cleanup! */
1370
	if (data->rpc_status != 0 || !data->rpc_done)
1371 1372 1373 1374 1375
		goto out_free;
	/* In case we need an open_confirm, no cleanup! */
	if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
		goto out_free;
	state = nfs4_opendata_to_nfs4_state(data);
1376
	if (!IS_ERR(state))
1377
		nfs4_close_state(&data->path, state, data->o_arg.fmode);
1378
out_free:
1379
	nfs4_opendata_put(data);
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
}

static const struct rpc_call_ops nfs4_open_ops = {
	.rpc_call_prepare = nfs4_open_prepare,
	.rpc_call_done = nfs4_open_done,
	.rpc_release = nfs4_open_release,
};

/*
 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
 */
static int _nfs4_proc_open(struct nfs4_opendata *data)
{
	struct inode *dir = data->dir->d_inode;
	struct nfs_server *server = NFS_SERVER(dir);
	struct nfs_openargs *o_arg = &data->o_arg;
	struct nfs_openres *o_res = &data->o_res;
	struct rpc_task *task;
1398 1399 1400 1401 1402 1403
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
		.rpc_argp = o_arg,
		.rpc_resp = o_res,
		.rpc_cred = data->owner->so_cred,
	};
T
Trond Myklebust 已提交
1404 1405
	struct rpc_task_setup task_setup_data = {
		.rpc_client = server->client,
1406
		.rpc_message = &msg,
T
Trond Myklebust 已提交
1407 1408
		.callback_ops = &nfs4_open_ops,
		.callback_data = data,
1409
		.workqueue = nfsiod_workqueue,
T
Trond Myklebust 已提交
1410 1411
		.flags = RPC_TASK_ASYNC,
	};
1412 1413
	int status;

1414
	kref_get(&data->kref);
1415 1416
	data->rpc_done = 0;
	data->rpc_status = 0;
1417
	data->cancelled = 0;
T
Trond Myklebust 已提交
1418
	task = rpc_run_task(&task_setup_data);
1419
	if (IS_ERR(task))
1420 1421 1422 1423 1424 1425 1426
		return PTR_ERR(task);
	status = nfs4_wait_for_completion_rpc_task(task);
	if (status != 0) {
		data->cancelled = 1;
		smp_wmb();
	} else
		status = data->rpc_status;
1427
	rpc_put_task(task);
1428
	if (status != 0 || !data->rpc_done)
1429 1430
		return status;

1431 1432 1433
	if (o_res->fh.size == 0)
		_nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);

1434 1435 1436 1437 1438
	if (o_arg->open_flags & O_CREAT) {
		update_changeattr(dir, &o_res->cinfo);
		nfs_post_op_update_inode(dir, o_res->dir_attr);
	} else
		nfs_refresh_inode(dir, o_res->dir_attr);
L
Linus Torvalds 已提交
1439
	if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1440
		status = _nfs4_proc_open_confirm(data);
L
Linus Torvalds 已提交
1441
		if (status != 0)
1442
			return status;
L
Linus Torvalds 已提交
1443 1444
	}
	if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1445
		_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1446
	return 0;
L
Linus Torvalds 已提交
1447 1448
}

1449
static int nfs4_recover_expired_lease(struct nfs_server *server)
1450
{
1451
	struct nfs_client *clp = server->nfs_client;
1452
	unsigned int loop;
1453
	int ret;
1454

1455
	for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1456
		ret = nfs4_wait_clnt_recover(clp);
1457
		if (ret != 0)
1458
			break;
1459 1460
		if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
		    !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1461
			break;
1462
		nfs4_schedule_state_recovery(clp);
1463
		ret = -EIO;
1464
	}
1465
	return ret;
1466 1467
}

L
Linus Torvalds 已提交
1468 1469 1470 1471 1472
/*
 * OPEN_EXPIRED:
 * 	reclaim state on the server after a network partition.
 * 	Assumes caller holds the appropriate lock
 */
1473
static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
L
Linus Torvalds 已提交
1474
{
1475
	struct nfs4_opendata *opendata;
1476
	int ret;
L
Linus Torvalds 已提交
1477

T
Trond Myklebust 已提交
1478 1479 1480
	opendata = nfs4_open_recoverdata_alloc(ctx, state);
	if (IS_ERR(opendata))
		return PTR_ERR(opendata);
1481
	ret = nfs4_open_recover(opendata, state);
1482
	if (ret == -ESTALE)
1483
		d_drop(ctx->path.dentry);
1484
	nfs4_opendata_put(opendata);
1485
	return ret;
L
Linus Torvalds 已提交
1486 1487
}

1488
static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1489
{
1490
	struct nfs_server *server = NFS_SERVER(state->inode);
1491 1492 1493 1494
	struct nfs4_exception exception = { };
	int err;

	do {
1495
		err = _nfs4_open_expired(ctx, state);
1496 1497 1498 1499 1500 1501 1502 1503
		switch (err) {
		default:
			goto out;
		case -NFS4ERR_GRACE:
		case -NFS4ERR_DELAY:
			nfs4_handle_exception(server, err, &exception);
			err = 0;
		}
1504
	} while (exception.retry);
1505
out:
1506 1507 1508
	return err;
}

L
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1509 1510 1511
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
	struct nfs_open_context *ctx;
1512
	int ret;
L
Linus Torvalds 已提交
1513

1514 1515 1516
	ctx = nfs4_state_find_open_context(state);
	if (IS_ERR(ctx))
		return PTR_ERR(ctx);
1517
	ret = nfs4_do_open_expired(ctx, state);
1518 1519
	put_nfs_open_context(ctx);
	return ret;
L
Linus Torvalds 已提交
1520 1521
}

1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
/*
 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
 * fields corresponding to attributes that were used to store the verifier.
 * Make sure we clobber those fields in the later setattr call
 */
static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
{
	if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
	    !(sattr->ia_valid & ATTR_ATIME_SET))
		sattr->ia_valid |= ATTR_ATIME;

	if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
	    !(sattr->ia_valid & ATTR_MTIME_SET))
		sattr->ia_valid |= ATTR_MTIME;
}

L
Linus Torvalds 已提交
1538
/*
1539
 * Returns a referenced nfs4_state
L
Linus Torvalds 已提交
1540
 */
1541
static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
L
Linus Torvalds 已提交
1542 1543 1544 1545
{
	struct nfs4_state_owner  *sp;
	struct nfs4_state     *state = NULL;
	struct nfs_server       *server = NFS_SERVER(dir);
1546
	struct nfs4_opendata *opendata;
1547
	int status;
L
Linus Torvalds 已提交
1548 1549 1550 1551 1552 1553 1554

	/* Protect against reboot recovery conflicts */
	status = -ENOMEM;
	if (!(sp = nfs4_get_state_owner(server, cred))) {
		dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
		goto out_err;
	}
1555 1556
	status = nfs4_recover_expired_lease(server);
	if (status != 0)
1557
		goto err_put_state_owner;
1558
	if (path->dentry->d_inode != NULL)
1559
		nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1560
	status = -ENOMEM;
1561
	opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1562
	if (opendata == NULL)
T
Trond Myklebust 已提交
1563
		goto err_put_state_owner;
L
Linus Torvalds 已提交
1564

1565 1566 1567
	if (path->dentry->d_inode != NULL)
		opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);

1568
	status = _nfs4_proc_open(opendata);
L
Linus Torvalds 已提交
1569
	if (status != 0)
1570
		goto err_opendata_put;
L
Linus Torvalds 已提交
1571

1572 1573 1574
	if (opendata->o_arg.open_flags & O_EXCL)
		nfs4_exclusive_attrset(opendata, sattr);

1575
	state = nfs4_opendata_to_nfs4_state(opendata);
1576 1577
	status = PTR_ERR(state);
	if (IS_ERR(state))
1578 1579
		goto err_opendata_put;
	nfs4_opendata_put(opendata);
L
Linus Torvalds 已提交
1580 1581 1582
	nfs4_put_state_owner(sp);
	*res = state;
	return 0;
1583 1584
err_opendata_put:
	nfs4_opendata_put(opendata);
1585 1586
err_put_state_owner:
	nfs4_put_state_owner(sp);
L
Linus Torvalds 已提交
1587 1588 1589 1590 1591 1592
out_err:
	*res = NULL;
	return status;
}


1593
static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
L
Linus Torvalds 已提交
1594 1595 1596 1597 1598 1599
{
	struct nfs4_exception exception = { };
	struct nfs4_state *res;
	int status;

	do {
1600
		status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
L
Linus Torvalds 已提交
1601 1602 1603 1604 1605 1606 1607 1608
		if (status == 0)
			break;
		/* NOTE: BAD_SEQID means the server and client disagree about the
		 * book-keeping w.r.t. state-changing operations
		 * (OPEN/CLOSE/LOCK/LOCKU...)
		 * It is actually a sign of a bug on the client or on the server.
		 *
		 * If we receive a BAD_SEQID error in the particular case of
1609
		 * doing an OPEN, we assume that nfs_increment_open_seqid() will
L
Linus Torvalds 已提交
1610 1611 1612 1613 1614
		 * have unhashed the old state_owner for us, and that we can
		 * therefore safely retry using a new one. We should still warn
		 * the user though...
		 */
		if (status == -NFS4ERR_BAD_SEQID) {
1615 1616 1617
			printk(KERN_WARNING "NFS: v4 server %s "
					" returned a bad sequence-id error!\n",
					NFS_SERVER(dir)->nfs_client->cl_hostname);
L
Linus Torvalds 已提交
1618 1619 1620
			exception.retry = 1;
			continue;
		}
1621 1622 1623 1624 1625 1626 1627 1628 1629 1630
		/*
		 * BAD_STATEID on OPEN means that the server cancelled our
		 * state before it received the OPEN_CONFIRM.
		 * Recover by retrying the request as per the discussion
		 * on Page 181 of RFC3530.
		 */
		if (status == -NFS4ERR_BAD_STATEID) {
			exception.retry = 1;
			continue;
		}
1631 1632 1633 1634 1635
		if (status == -EAGAIN) {
			/* We must have found a delegation */
			exception.retry = 1;
			continue;
		}
L
Linus Torvalds 已提交
1636 1637 1638 1639 1640 1641
		res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
					status, &exception));
	} while (exception.retry);
	return res;
}

1642 1643 1644
static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
			    struct nfs_fattr *fattr, struct iattr *sattr,
			    struct nfs4_state *state)
L
Linus Torvalds 已提交
1645
{
1646
	struct nfs_server *server = NFS_SERVER(inode);
L
Linus Torvalds 已提交
1647
        struct nfs_setattrargs  arg = {
1648
                .fh             = NFS_FH(inode),
L
Linus Torvalds 已提交
1649 1650 1651 1652 1653 1654 1655 1656 1657
                .iap            = sattr,
		.server		= server,
		.bitmask = server->attr_bitmask,
        };
        struct nfs_setattrres  res = {
		.fattr		= fattr,
		.server		= server,
        };
        struct rpc_message msg = {
1658 1659 1660 1661
		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
		.rpc_cred	= cred,
L
Linus Torvalds 已提交
1662
        };
1663
	unsigned long timestamp = jiffies;
1664
	int status;
L
Linus Torvalds 已提交
1665

1666
	nfs_fattr_init(fattr);
L
Linus Torvalds 已提交
1667

1668 1669 1670
	if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
		/* Use that stateid */
	} else if (state != NULL) {
1671 1672
		nfs4_copy_stateid(&arg.stateid, state, current->files);
	} else
L
Linus Torvalds 已提交
1673 1674
		memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));

A
Andy Adamson 已提交
1675
	status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1676 1677
	if (status == 0 && state != NULL)
		renew_lease(server, timestamp);
1678
	return status;
L
Linus Torvalds 已提交
1679 1680
}

1681 1682 1683
static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
			   struct nfs_fattr *fattr, struct iattr *sattr,
			   struct nfs4_state *state)
L
Linus Torvalds 已提交
1684
{
1685
	struct nfs_server *server = NFS_SERVER(inode);
L
Linus Torvalds 已提交
1686 1687 1688 1689
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(server,
1690
				_nfs4_do_setattr(inode, cred, fattr, sattr, state),
L
Linus Torvalds 已提交
1691 1692 1693 1694 1695 1696
				&exception);
	} while (exception.retry);
	return err;
}

struct nfs4_closedata {
1697
	struct path path;
L
Linus Torvalds 已提交
1698 1699 1700 1701
	struct inode *inode;
	struct nfs4_state *state;
	struct nfs_closeargs arg;
	struct nfs_closeres res;
1702
	struct nfs_fattr fattr;
1703
	unsigned long timestamp;
L
Linus Torvalds 已提交
1704 1705
};

1706
static void nfs4_free_closedata(void *data)
1707
{
1708 1709
	struct nfs4_closedata *calldata = data;
	struct nfs4_state_owner *sp = calldata->state->owner;
1710 1711 1712 1713

	nfs4_put_open_state(calldata->state);
	nfs_free_seqid(calldata->arg.seqid);
	nfs4_put_state_owner(sp);
J
Jan Blunck 已提交
1714
	path_put(&calldata->path);
1715 1716 1717
	kfree(calldata);
}

1718
static void nfs4_close_done(struct rpc_task *task, void *data)
L
Linus Torvalds 已提交
1719
{
1720
	struct nfs4_closedata *calldata = data;
L
Linus Torvalds 已提交
1721 1722 1723
	struct nfs4_state *state = calldata->state;
	struct nfs_server *server = NFS_SERVER(calldata->inode);

1724
	nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
T
Trond Myklebust 已提交
1725 1726
	if (RPC_ASSASSINATED(task))
		return;
L
Linus Torvalds 已提交
1727 1728 1729 1730 1731
        /* hmm. we are done with the inode, and in the process of freeing
	 * the state_owner. we keep this around to process errors
	 */
	switch (task->tk_status) {
		case 0:
1732
			nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1733
			renew_lease(server, calldata->timestamp);
L
Linus Torvalds 已提交
1734 1735
			break;
		case -NFS4ERR_STALE_STATEID:
1736 1737
		case -NFS4ERR_OLD_STATEID:
		case -NFS4ERR_BAD_STATEID:
L
Linus Torvalds 已提交
1738
		case -NFS4ERR_EXPIRED:
1739
			if (calldata->arg.fmode == 0)
1740
				break;
L
Linus Torvalds 已提交
1741
		default:
1742
			if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1743
				nfs4_restart_rpc(task, server->nfs_client);
L
Linus Torvalds 已提交
1744 1745 1746
				return;
			}
	}
1747
	nfs_refresh_inode(calldata->inode, calldata->res.fattr);
L
Linus Torvalds 已提交
1748 1749
}

T
Trond Myklebust 已提交
1750
static void nfs4_close_prepare(struct rpc_task *task, void *data)
L
Linus Torvalds 已提交
1751
{
T
Trond Myklebust 已提交
1752
	struct nfs4_closedata *calldata = data;
1753
	struct nfs4_state *state = calldata->state;
1754
	int clear_rd, clear_wr, clear_rdwr;
1755

1756
	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1757
		return;
1758 1759

	clear_rd = clear_wr = clear_rdwr = 0;
1760
	spin_lock(&state->owner->so_lock);
1761
	/* Calculate the change in open mode */
1762
	if (state->n_rdwr == 0) {
1763 1764 1765 1766 1767 1768 1769 1770
		if (state->n_rdonly == 0) {
			clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
			clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
		}
		if (state->n_wronly == 0) {
			clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
			clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
		}
1771
	}
1772
	spin_unlock(&state->owner->so_lock);
1773
	if (!clear_rd && !clear_wr && !clear_rdwr) {
1774 1775
		/* Note: exit _without_ calling nfs4_close_done */
		task->tk_action = NULL;
1776 1777
		return;
	}
1778
	nfs_fattr_init(calldata->res.fattr);
1779
	if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1780
		task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1781
		calldata->arg.fmode = FMODE_READ;
1782
	} else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1783
		task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1784
		calldata->arg.fmode = FMODE_WRITE;
1785
	}
1786
	calldata->timestamp = jiffies;
1787 1788 1789 1790
	if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
				&calldata->arg.seq_args, &calldata->res.seq_res,
				1, task))
		return;
1791
	rpc_call_start(task);
L
Linus Torvalds 已提交
1792 1793
}

1794
static const struct rpc_call_ops nfs4_close_ops = {
T
Trond Myklebust 已提交
1795
	.rpc_call_prepare = nfs4_close_prepare,
1796 1797 1798 1799
	.rpc_call_done = nfs4_close_done,
	.rpc_release = nfs4_free_closedata,
};

L
Linus Torvalds 已提交
1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810
/* 
 * It is possible for data to be read/written from a mem-mapped file 
 * after the sys_close call (which hits the vfs layer as a flush).
 * This means that we can't safely call nfsv4 close on a file until 
 * the inode is cleared. This in turn means that we are not good
 * NFSv4 citizens - we do not indicate to the server to update the file's 
 * share state even when we are done with one of the three share 
 * stateid's in the inode.
 *
 * NOTE: Caller must be holding the sp->so_owner semaphore!
 */
1811
int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
L
Linus Torvalds 已提交
1812
{
1813
	struct nfs_server *server = NFS_SERVER(state->inode);
L
Linus Torvalds 已提交
1814
	struct nfs4_closedata *calldata;
1815 1816
	struct nfs4_state_owner *sp = state->owner;
	struct rpc_task *task;
1817 1818 1819 1820
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
		.rpc_cred = state->owner->so_cred,
	};
T
Trond Myklebust 已提交
1821 1822
	struct rpc_task_setup task_setup_data = {
		.rpc_client = server->client,
1823
		.rpc_message = &msg,
T
Trond Myklebust 已提交
1824
		.callback_ops = &nfs4_close_ops,
1825
		.workqueue = nfsiod_workqueue,
T
Trond Myklebust 已提交
1826 1827
		.flags = RPC_TASK_ASYNC,
	};
1828
	int status = -ENOMEM;
L
Linus Torvalds 已提交
1829

1830
	calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
L
Linus Torvalds 已提交
1831
	if (calldata == NULL)
1832
		goto out;
1833
	calldata->inode = state->inode;
L
Linus Torvalds 已提交
1834
	calldata->state = state;
1835
	calldata->arg.fh = NFS_FH(state->inode);
1836
	calldata->arg.stateid = &state->open_stateid;
1837 1838
	if (nfs4_has_session(server->nfs_client))
		memset(calldata->arg.stateid->data, 0, 4);    /* clear seqid */
L
Linus Torvalds 已提交
1839
	/* Serialization for the sequence id */
1840
	calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1841 1842
	if (calldata->arg.seqid == NULL)
		goto out_free_calldata;
1843
	calldata->arg.fmode = 0;
1844
	calldata->arg.bitmask = server->cache_consistency_bitmask;
1845
	calldata->res.fattr = &calldata->fattr;
1846
	calldata->res.seqid = calldata->arg.seqid;
1847
	calldata->res.server = server;
A
Andy Adamson 已提交
1848
	calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1849 1850
	calldata->path.mnt = mntget(path->mnt);
	calldata->path.dentry = dget(path->dentry);
1851

1852 1853
	msg.rpc_argp = &calldata->arg,
	msg.rpc_resp = &calldata->res,
T
Trond Myklebust 已提交
1854 1855
	task_setup_data.callback_data = calldata;
	task = rpc_run_task(&task_setup_data);
1856 1857
	if (IS_ERR(task))
		return PTR_ERR(task);
1858 1859 1860
	status = 0;
	if (wait)
		status = rpc_wait_for_completion_task(task);
1861
	rpc_put_task(task);
1862
	return status;
1863 1864 1865
out_free_calldata:
	kfree(calldata);
out:
1866 1867
	nfs4_put_open_state(state);
	nfs4_put_state_owner(sp);
1868
	return status;
L
Linus Torvalds 已提交
1869 1870
}

1871
static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1872 1873
{
	struct file *filp;
1874
	int ret;
1875

1876
	/* If the open_intent is for execute, we have an extra check to make */
1877
	if (fmode & FMODE_EXEC) {
1878
		ret = nfs_may_open(state->inode,
1879 1880 1881 1882 1883
				state->owner->so_cred,
				nd->intent.open.flags);
		if (ret < 0)
			goto out_close;
	}
1884
	filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1885 1886
	if (!IS_ERR(filp)) {
		struct nfs_open_context *ctx;
1887
		ctx = nfs_file_open_context(filp);
1888
		ctx->state = state;
1889 1890
		return 0;
	}
1891 1892
	ret = PTR_ERR(filp);
out_close:
1893
	nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1894
	return ret;
1895 1896 1897
}

struct dentry *
L
Linus Torvalds 已提交
1898 1899
nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
1900
	struct path path = {
1901
		.mnt = nd->path.mnt,
1902 1903
		.dentry = dentry,
	};
1904
	struct dentry *parent;
L
Linus Torvalds 已提交
1905 1906 1907
	struct iattr attr;
	struct rpc_cred *cred;
	struct nfs4_state *state;
1908
	struct dentry *res;
1909
	fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
L
Linus Torvalds 已提交
1910 1911 1912 1913 1914

	if (nd->flags & LOOKUP_CREATE) {
		attr.ia_mode = nd->intent.open.create_mode;
		attr.ia_valid = ATTR_MODE;
		if (!IS_POSIXACL(dir))
A
Al Viro 已提交
1915
			attr.ia_mode &= ~current_umask();
L
Linus Torvalds 已提交
1916 1917 1918 1919 1920
	} else {
		attr.ia_valid = 0;
		BUG_ON(nd->intent.open.flags & O_CREAT);
	}

1921
	cred = rpc_lookup_cred();
L
Linus Torvalds 已提交
1922
	if (IS_ERR(cred))
1923
		return (struct dentry *)cred;
T
Trond Myklebust 已提交
1924 1925 1926
	parent = dentry->d_parent;
	/* Protect against concurrent sillydeletes */
	nfs_block_sillyrename(parent);
1927
	state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
L
Linus Torvalds 已提交
1928
	put_rpccred(cred);
1929
	if (IS_ERR(state)) {
1930
		if (PTR_ERR(state) == -ENOENT) {
1931
			d_add(dentry, NULL);
1932 1933
			nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
		}
T
Trond Myklebust 已提交
1934
		nfs_unblock_sillyrename(parent);
1935 1936
		return (struct dentry *)state;
	}
1937
	res = d_add_unique(dentry, igrab(state->inode));
1938
	if (res != NULL)
1939
		path.dentry = res;
1940
	nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
T
Trond Myklebust 已提交
1941
	nfs_unblock_sillyrename(parent);
1942
	nfs4_intent_set_file(nd, &path, state, fmode);
1943
	return res;
L
Linus Torvalds 已提交
1944 1945 1946
}

int
1947
nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
L
Linus Torvalds 已提交
1948
{
1949
	struct path path = {
1950
		.mnt = nd->path.mnt,
1951 1952
		.dentry = dentry,
	};
L
Linus Torvalds 已提交
1953 1954
	struct rpc_cred *cred;
	struct nfs4_state *state;
1955
	fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
L
Linus Torvalds 已提交
1956

1957
	cred = rpc_lookup_cred();
L
Linus Torvalds 已提交
1958 1959
	if (IS_ERR(cred))
		return PTR_ERR(cred);
1960
	state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
L
Linus Torvalds 已提交
1961
	put_rpccred(cred);
1962 1963 1964 1965 1966 1967 1968 1969 1970
	if (IS_ERR(state)) {
		switch (PTR_ERR(state)) {
			case -EPERM:
			case -EACCES:
			case -EDQUOT:
			case -ENOSPC:
			case -EROFS:
				lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
				return 1;
1971 1972
			default:
				goto out_drop;
1973 1974
		}
	}
1975
	if (state->inode == dentry->d_inode) {
1976
		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1977
		nfs4_intent_set_file(nd, &path, state, fmode);
L
Linus Torvalds 已提交
1978 1979
		return 1;
	}
1980
	nfs4_close_sync(&path, state, fmode);
1981 1982
out_drop:
	d_drop(dentry);
L
Linus Torvalds 已提交
1983 1984 1985
	return 0;
}

1986
static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
T
Trond Myklebust 已提交
1987 1988 1989 1990 1991 1992 1993 1994
{
	if (ctx->state == NULL)
		return;
	if (is_sync)
		nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
	else
		nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
}
L
Linus Torvalds 已提交
1995 1996 1997

static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
{
B
Benny Halevy 已提交
1998 1999 2000
	struct nfs4_server_caps_arg args = {
		.fhandle = fhandle,
	};
L
Linus Torvalds 已提交
2001 2002 2003
	struct nfs4_server_caps_res res = {};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
B
Benny Halevy 已提交
2004
		.rpc_argp = &args,
L
Linus Torvalds 已提交
2005 2006 2007 2008
		.rpc_resp = &res,
	};
	int status;

A
Andy Adamson 已提交
2009
	status = nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2010 2011
	if (status == 0) {
		memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2012 2013 2014 2015 2016
		server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
				NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
				NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
				NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
				NFS_CAP_CTIME|NFS_CAP_MTIME);
L
Linus Torvalds 已提交
2017 2018 2019 2020 2021 2022
		if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
			server->caps |= NFS_CAP_ACLS;
		if (res.has_links != 0)
			server->caps |= NFS_CAP_HARDLINKS;
		if (res.has_symlinks != 0)
			server->caps |= NFS_CAP_SYMLINKS;
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
		if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
			server->caps |= NFS_CAP_FILEID;
		if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
			server->caps |= NFS_CAP_MODE;
		if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
			server->caps |= NFS_CAP_NLINK;
		if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
			server->caps |= NFS_CAP_OWNER;
		if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
			server->caps |= NFS_CAP_OWNER_GROUP;
		if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
			server->caps |= NFS_CAP_ATIME;
		if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
			server->caps |= NFS_CAP_CTIME;
		if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
			server->caps |= NFS_CAP_MTIME;

2040 2041 2042
		memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
		server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
		server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
L
Linus Torvalds 已提交
2043 2044
		server->acl_bitmask = res.acl_bitmask;
	}
A
Andy Adamson 已提交
2045

L
Linus Torvalds 已提交
2046 2047 2048
	return status;
}

2049
int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
L
Linus Torvalds 已提交
2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(server,
				_nfs4_server_capabilities(server, fhandle),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_fsinfo *info)
{
	struct nfs4_lookup_root_arg args = {
		.bitmask = nfs4_fattr_bitmap,
	};
	struct nfs4_lookup_res res = {
		.server = server,
2069
		.fattr = info->fattr,
L
Linus Torvalds 已提交
2070 2071 2072 2073 2074 2075 2076
		.fh = fhandle,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
2077

2078
	nfs_fattr_init(info->fattr);
2079
	return nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094
}

static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_fsinfo *info)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(server,
				_nfs4_lookup_root(server, fhandle, info),
				&exception);
	} while (exception.retry);
	return err;
}

2095 2096 2097
/*
 * get the file handle for the "/" directory on the server
 */
L
Linus Torvalds 已提交
2098
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2099
			      struct nfs_fsinfo *info)
L
Linus Torvalds 已提交
2100 2101 2102 2103 2104 2105 2106 2107
{
	int status;

	status = nfs4_lookup_root(server, fhandle, info);
	if (status == 0)
		status = nfs4_server_capabilities(server, fhandle);
	if (status == 0)
		status = nfs4_do_fsinfo(server, fhandle, info);
2108
	return nfs4_map_errors(status);
L
Linus Torvalds 已提交
2109 2110
}

M
Manoj Naik 已提交
2111 2112 2113 2114 2115
/*
 * Get locations and (maybe) other attributes of a referral.
 * Note that we'll actually follow the referral later when
 * we detect fsid mismatch in inode revalidation
 */
2116
static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
M
Manoj Naik 已提交
2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
{
	int status = -ENOMEM;
	struct page *page = NULL;
	struct nfs4_fs_locations *locations = NULL;

	page = alloc_page(GFP_KERNEL);
	if (page == NULL)
		goto out;
	locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
	if (locations == NULL)
		goto out;

2129
	status = nfs4_proc_fs_locations(dir, name, locations, page);
M
Manoj Naik 已提交
2130 2131 2132 2133
	if (status != 0)
		goto out;
	/* Make sure server returned a different fsid for the referral */
	if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2134
		dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
M
Manoj Naik 已提交
2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151
		status = -EIO;
		goto out;
	}

	memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
	fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
	if (!fattr->mode)
		fattr->mode = S_IFDIR;
	memset(fhandle, 0, sizeof(struct nfs_fh));
out:
	if (page)
		__free_page(page);
	if (locations)
		kfree(locations);
	return status;
}

L
Linus Torvalds 已提交
2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
	struct nfs4_getattr_arg args = {
		.fh = fhandle,
		.bitmask = server->attr_bitmask,
	};
	struct nfs4_getattr_res res = {
		.fattr = fattr,
		.server = server,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	
2168
	nfs_fattr_init(fattr);
A
Andy Adamson 已提交
2169
	return nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204
}

static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(server,
				_nfs4_proc_getattr(server, fhandle, fattr),
				&exception);
	} while (exception.retry);
	return err;
}

/* 
 * The file is not closed if it is opened due to the a request to change
 * the size of the file. The open call will not be needed once the
 * VFS layer lookup-intents are implemented.
 *
 * Close is called when the inode is destroyed.
 * If we haven't opened the file for O_WRONLY, we
 * need to in the size_change case to obtain a stateid.
 *
 * Got race?
 * Because OPEN is always done by name in nfsv4, it is
 * possible that we opened a different file by the same
 * name.  We can recognize this race condition, but we
 * can't do anything about it besides returning an error.
 *
 * This will be fixed with VFS changes (lookup-intent).
 */
static int
nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
		  struct iattr *sattr)
{
2205
	struct inode *inode = dentry->d_inode;
2206
	struct rpc_cred *cred = NULL;
2207
	struct nfs4_state *state = NULL;
L
Linus Torvalds 已提交
2208 2209
	int status;

2210
	nfs_fattr_init(fattr);
L
Linus Torvalds 已提交
2211
	
2212
	/* Search for an existing open(O_WRITE) file */
2213 2214 2215 2216
	if (sattr->ia_valid & ATTR_FILE) {
		struct nfs_open_context *ctx;

		ctx = nfs_file_open_context(sattr->ia_file);
N
Neil Brown 已提交
2217 2218 2219 2220
		if (ctx) {
			cred = ctx->cred;
			state = ctx->state;
		}
2221
	}
2222

2223
	status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2224 2225
	if (status == 0)
		nfs_setattr_update_inode(inode, sattr);
L
Linus Torvalds 已提交
2226 2227 2228
	return status;
}

2229 2230
static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
		const struct qstr *name, struct nfs_fh *fhandle,
D
David Howells 已提交
2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252
		struct nfs_fattr *fattr)
{
	int		       status;
	struct nfs4_lookup_arg args = {
		.bitmask = server->attr_bitmask,
		.dir_fh = dirfh,
		.name = name,
	};
	struct nfs4_lookup_res res = {
		.server = server,
		.fattr = fattr,
		.fh = fhandle,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};

	nfs_fattr_init(fattr);

	dprintk("NFS call  lookupfh %s\n", name->name);
A
Andy Adamson 已提交
2253
	status = nfs4_call_sync(server, &msg, &args, &res, 0);
D
David Howells 已提交
2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264
	dprintk("NFS reply lookupfh: %d\n", status);
	return status;
}

static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
			      struct qstr *name, struct nfs_fh *fhandle,
			      struct nfs_fattr *fattr)
{
	struct nfs4_exception exception = { };
	int err;
	do {
2265 2266 2267 2268 2269 2270 2271
		err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
		/* FIXME: !!!! */
		if (err == -NFS4ERR_MOVED) {
			err = -EREMOTE;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
D
David Howells 已提交
2272 2273 2274 2275
	} while (exception.retry);
	return err;
}

2276
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
L
Linus Torvalds 已提交
2277 2278
		struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
2279
	int status;
L
Linus Torvalds 已提交
2280 2281
	
	dprintk("NFS call  lookup %s\n", name->name);
2282
	status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
M
Manoj Naik 已提交
2283 2284
	if (status == -NFS4ERR_MOVED)
		status = nfs4_get_referral(dir, name, fattr, fhandle);
L
Linus Torvalds 已提交
2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
	dprintk("NFS reply lookup: %d\n", status);
	return status;
}

static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dir),
				_nfs4_proc_lookup(dir, name, fhandle, fattr),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
2303 2304
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs_fattr fattr;
L
Linus Torvalds 已提交
2305 2306
	struct nfs4_accessargs args = {
		.fh = NFS_FH(inode),
2307 2308 2309 2310 2311
		.bitmask = server->attr_bitmask,
	};
	struct nfs4_accessres res = {
		.server = server,
		.fattr = &fattr,
L
Linus Torvalds 已提交
2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
		.rpc_argp = &args,
		.rpc_resp = &res,
		.rpc_cred = entry->cred,
	};
	int mode = entry->mask;
	int status;

	/*
	 * Determine which access bits we want to ask for...
	 */
	if (mode & MAY_READ)
		args.access |= NFS4_ACCESS_READ;
	if (S_ISDIR(inode->i_mode)) {
		if (mode & MAY_WRITE)
			args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
		if (mode & MAY_EXEC)
			args.access |= NFS4_ACCESS_LOOKUP;
	} else {
		if (mode & MAY_WRITE)
			args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
		if (mode & MAY_EXEC)
			args.access |= NFS4_ACCESS_EXECUTE;
	}
2338
	nfs_fattr_init(&fattr);
A
Andy Adamson 已提交
2339
	status = nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2340 2341 2342 2343 2344 2345 2346 2347
	if (!status) {
		entry->mask = 0;
		if (res.access & NFS4_ACCESS_READ)
			entry->mask |= MAY_READ;
		if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
			entry->mask |= MAY_WRITE;
		if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
			entry->mask |= MAY_EXEC;
2348
		nfs_refresh_inode(inode, &fattr);
L
Linus Torvalds 已提交
2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397
	}
	return status;
}

static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(inode),
				_nfs4_proc_access(inode, entry),
				&exception);
	} while (exception.retry);
	return err;
}

/*
 * TODO: For the time being, we don't try to get any attributes
 * along with any of the zero-copy operations READ, READDIR,
 * READLINK, WRITE.
 *
 * In the case of the first three, we want to put the GETATTR
 * after the read-type operation -- this is because it is hard
 * to predict the length of a GETATTR response in v4, and thus
 * align the READ data correctly.  This means that the GETATTR
 * may end up partially falling into the page cache, and we should
 * shift it into the 'tail' of the xdr_buf before processing.
 * To do this efficiently, we need to know the total length
 * of data received, which doesn't seem to be available outside
 * of the RPC layer.
 *
 * In the case of WRITE, we also want to put the GETATTR after
 * the operation -- in this case because we want to make sure
 * we get the post-operation mtime and size.  This means that
 * we can't use xdr_encode_pages() as written: we need a variant
 * of it which would leave room in the 'tail' iovec.
 *
 * Both of these changes to the XDR layer would in fact be quite
 * minor, but I decided to leave them for a subsequent patch.
 */
static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
		unsigned int pgbase, unsigned int pglen)
{
	struct nfs4_readlink args = {
		.fh       = NFS_FH(inode),
		.pgbase	  = pgbase,
		.pglen    = pglen,
		.pages    = &page,
	};
B
Benny Halevy 已提交
2398
	struct nfs4_readlink_res res;
L
Linus Torvalds 已提交
2399 2400 2401
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
		.rpc_argp = &args,
B
Benny Halevy 已提交
2402
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2403 2404
	};

A
Andy Adamson 已提交
2405
	return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
}

static int nfs4_proc_readlink(struct inode *inode, struct page *page,
		unsigned int pgbase, unsigned int pglen)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(inode),
				_nfs4_proc_readlink(inode, page, pgbase, pglen),
				&exception);
	} while (exception.retry);
	return err;
}

/*
 * Got race?
 * We will need to arrange for the VFS layer to provide an atomic open.
 * Until then, this create/open method is prone to inefficiency and race
 * conditions due to the lookup, create, and open VFS calls from sys_open()
 * placed on the wire.
 *
 * Given the above sorry state of affairs, I'm simply sending an OPEN.
 * The file will be opened again in the subsequent VFS open call
 * (nfs4_proc_file_open).
 *
 * The open for read will just hang around to be used by any process that
 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
 */

static int
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2438
                 int flags, struct nameidata *nd)
L
Linus Torvalds 已提交
2439
{
2440
	struct path path = {
2441
		.mnt = nd->path.mnt,
2442 2443
		.dentry = dentry,
	};
L
Linus Torvalds 已提交
2444 2445
	struct nfs4_state *state;
	struct rpc_cred *cred;
2446
	fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
L
Linus Torvalds 已提交
2447 2448
	int status = 0;

2449
	cred = rpc_lookup_cred();
L
Linus Torvalds 已提交
2450 2451 2452 2453
	if (IS_ERR(cred)) {
		status = PTR_ERR(cred);
		goto out;
	}
2454
	state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2455
	d_drop(dentry);
L
Linus Torvalds 已提交
2456 2457
	if (IS_ERR(state)) {
		status = PTR_ERR(state);
2458
		goto out_putcred;
L
Linus Torvalds 已提交
2459
	}
2460
	d_add(dentry, igrab(state->inode));
2461
	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
L
Linus Torvalds 已提交
2462 2463
	if (flags & O_EXCL) {
		struct nfs_fattr fattr;
2464
		status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2465
		if (status == 0)
2466
			nfs_setattr_update_inode(state->inode, sattr);
2467
		nfs_post_op_update_inode(state->inode, &fattr);
2468
	}
2469
	if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2470
		status = nfs4_intent_set_file(nd, &path, state, fmode);
2471
	else
2472
		nfs4_close_sync(&path, state, fmode);
2473 2474
out_putcred:
	put_rpccred(cred);
L
Linus Torvalds 已提交
2475 2476 2477 2478 2479 2480
out:
	return status;
}

static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
{
2481
	struct nfs_server *server = NFS_SERVER(dir);
2482
	struct nfs_removeargs args = {
L
Linus Torvalds 已提交
2483
		.fh = NFS_FH(dir),
2484 2485
		.name.len = name->len,
		.name.name = name->name,
2486 2487
		.bitmask = server->attr_bitmask,
	};
2488
	struct nfs_removeres res = {
2489
		.server = server,
L
Linus Torvalds 已提交
2490 2491
	};
	struct rpc_message msg = {
2492 2493 2494
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
		.rpc_argp = &args,
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2495 2496 2497
	};
	int			status;

2498
	nfs_fattr_init(&res.dir_attr);
A
Andy Adamson 已提交
2499
	status = nfs4_call_sync(server, &msg, &args, &res, 1);
2500 2501
	if (status == 0) {
		update_changeattr(dir, &res.cinfo);
2502
		nfs_post_op_update_inode(dir, &res.dir_attr);
2503
	}
L
Linus Torvalds 已提交
2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518
	return status;
}

static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dir),
				_nfs4_proc_remove(dir, name),
				&exception);
	} while (exception.retry);
	return err;
}

2519
static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
L
Linus Torvalds 已提交
2520
{
2521 2522 2523
	struct nfs_server *server = NFS_SERVER(dir);
	struct nfs_removeargs *args = msg->rpc_argp;
	struct nfs_removeres *res = msg->rpc_resp;
L
Linus Torvalds 已提交
2524

2525
	args->bitmask = server->cache_consistency_bitmask;
2526
	res->server = server;
L
Linus Torvalds 已提交
2527 2528 2529
	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
}

2530
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
L
Linus Torvalds 已提交
2531
{
2532 2533
	struct nfs_removeres *res = task->tk_msg.rpc_resp;

2534
	nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2535
	if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2536 2537 2538 2539
		return 0;
	update_changeattr(dir, &res->cinfo);
	nfs_post_op_update_inode(dir, &res->dir_attr);
	return 1;
L
Linus Torvalds 已提交
2540 2541 2542 2543 2544
}

static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
		struct inode *new_dir, struct qstr *new_name)
{
2545
	struct nfs_server *server = NFS_SERVER(old_dir);
L
Linus Torvalds 已提交
2546 2547 2548 2549 2550
	struct nfs4_rename_arg arg = {
		.old_dir = NFS_FH(old_dir),
		.new_dir = NFS_FH(new_dir),
		.old_name = old_name,
		.new_name = new_name,
2551 2552 2553 2554 2555 2556 2557
		.bitmask = server->attr_bitmask,
	};
	struct nfs_fattr old_fattr, new_fattr;
	struct nfs4_rename_res res = {
		.server = server,
		.old_fattr = &old_fattr,
		.new_fattr = &new_fattr,
L
Linus Torvalds 已提交
2558 2559 2560 2561 2562 2563 2564 2565
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
		.rpc_argp = &arg,
		.rpc_resp = &res,
	};
	int			status;
	
2566 2567
	nfs_fattr_init(res.old_fattr);
	nfs_fattr_init(res.new_fattr);
A
Andy Adamson 已提交
2568
	status = nfs4_call_sync(server, &msg, &arg, &res, 1);
L
Linus Torvalds 已提交
2569 2570 2571

	if (!status) {
		update_changeattr(old_dir, &res.old_cinfo);
2572
		nfs_post_op_update_inode(old_dir, res.old_fattr);
L
Linus Torvalds 已提交
2573
		update_changeattr(new_dir, &res.new_cinfo);
2574
		nfs_post_op_update_inode(new_dir, res.new_fattr);
L
Linus Torvalds 已提交
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
	}
	return status;
}

static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
		struct inode *new_dir, struct qstr *new_name)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(old_dir),
				_nfs4_proc_rename(old_dir, old_name,
					new_dir, new_name),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
2595
	struct nfs_server *server = NFS_SERVER(inode);
L
Linus Torvalds 已提交
2596 2597 2598 2599
	struct nfs4_link_arg arg = {
		.fh     = NFS_FH(inode),
		.dir_fh = NFS_FH(dir),
		.name   = name,
2600 2601 2602 2603 2604 2605 2606
		.bitmask = server->attr_bitmask,
	};
	struct nfs_fattr fattr, dir_attr;
	struct nfs4_link_res res = {
		.server = server,
		.fattr = &fattr,
		.dir_attr = &dir_attr,
L
Linus Torvalds 已提交
2607 2608 2609 2610
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
		.rpc_argp = &arg,
2611
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2612 2613 2614
	};
	int			status;

2615 2616
	nfs_fattr_init(res.fattr);
	nfs_fattr_init(res.dir_attr);
A
Andy Adamson 已提交
2617
	status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2618 2619 2620
	if (!status) {
		update_changeattr(dir, &res.cinfo);
		nfs_post_op_update_inode(dir, res.dir_attr);
2621
		nfs_post_op_update_inode(inode, res.fattr);
2622
	}
L
Linus Torvalds 已提交
2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638

	return status;
}

static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(inode),
				_nfs4_proc_link(inode, dir, name),
				&exception);
	} while (exception.retry);
	return err;
}

2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677
struct nfs4_createdata {
	struct rpc_message msg;
	struct nfs4_create_arg arg;
	struct nfs4_create_res res;
	struct nfs_fh fh;
	struct nfs_fattr fattr;
	struct nfs_fattr dir_fattr;
};

static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
		struct qstr *name, struct iattr *sattr, u32 ftype)
{
	struct nfs4_createdata *data;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data != NULL) {
		struct nfs_server *server = NFS_SERVER(dir);

		data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
		data->msg.rpc_argp = &data->arg;
		data->msg.rpc_resp = &data->res;
		data->arg.dir_fh = NFS_FH(dir);
		data->arg.server = server;
		data->arg.name = name;
		data->arg.attrs = sattr;
		data->arg.ftype = ftype;
		data->arg.bitmask = server->attr_bitmask;
		data->res.server = server;
		data->res.fh = &data->fh;
		data->res.fattr = &data->fattr;
		data->res.dir_fattr = &data->dir_fattr;
		nfs_fattr_init(data->res.fattr);
		nfs_fattr_init(data->res.dir_fattr);
	}
	return data;
}

static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
{
A
Andy Adamson 已提交
2678 2679
	int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
				    &data->arg, &data->res, 1);
2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692
	if (status == 0) {
		update_changeattr(dir, &data->res.dir_cinfo);
		nfs_post_op_update_inode(dir, data->res.dir_fattr);
		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
	}
	return status;
}

static void nfs4_free_createdata(struct nfs4_createdata *data)
{
	kfree(data);
}

2693
static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2694
		struct page *page, unsigned int len, struct iattr *sattr)
L
Linus Torvalds 已提交
2695
{
2696 2697
	struct nfs4_createdata *data;
	int status = -ENAMETOOLONG;
L
Linus Torvalds 已提交
2698

2699
	if (len > NFS4_MAXPATHLEN)
2700
		goto out;
2701

2702 2703 2704 2705 2706 2707 2708 2709
	status = -ENOMEM;
	data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
	if (data == NULL)
		goto out;

	data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
	data->arg.u.symlink.pages = &page;
	data->arg.u.symlink.len = len;
L
Linus Torvalds 已提交
2710
	
2711 2712 2713 2714
	status = nfs4_do_create(dir, dentry, data);

	nfs4_free_createdata(data);
out:
L
Linus Torvalds 已提交
2715 2716 2717
	return status;
}

2718
static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2719
		struct page *page, unsigned int len, struct iattr *sattr)
L
Linus Torvalds 已提交
2720 2721 2722 2723 2724
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dir),
2725 2726
				_nfs4_proc_symlink(dir, dentry, page,
							len, sattr),
L
Linus Torvalds 已提交
2727 2728 2729 2730 2731 2732 2733 2734
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
		struct iattr *sattr)
{
2735 2736
	struct nfs4_createdata *data;
	int status = -ENOMEM;
L
Linus Torvalds 已提交
2737

2738 2739 2740 2741 2742 2743 2744 2745
	data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
	if (data == NULL)
		goto out;

	status = nfs4_do_create(dir, dentry, data);

	nfs4_free_createdata(data);
out:
L
Linus Torvalds 已提交
2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770
	return status;
}

static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
		struct iattr *sattr)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dir),
				_nfs4_proc_mkdir(dir, dentry, sattr),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                  u64 cookie, struct page *page, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs4_readdir_arg args = {
		.fh = NFS_FH(dir),
		.pages = &page,
		.pgbase = 0,
		.count = count,
2771
		.bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
L
Linus Torvalds 已提交
2772 2773 2774 2775 2776 2777 2778 2779 2780 2781
	};
	struct nfs4_readdir_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
		.rpc_argp = &args,
		.rpc_resp = &res,
		.rpc_cred = cred,
	};
	int			status;

2782
	dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2783 2784 2785
			dentry->d_parent->d_name.name,
			dentry->d_name.name,
			(unsigned long long)cookie);
L
Linus Torvalds 已提交
2786 2787
	nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
	res.pgbase = args.pgbase;
A
Andy Adamson 已提交
2788
	status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2789 2790
	if (status == 0)
		memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2791 2792 2793

	nfs_invalidate_atime(dir);

2794
	dprintk("%s: returns %d\n", __func__, status);
L
Linus Torvalds 已提交
2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814
	return status;
}

static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                  u64 cookie, struct page *page, unsigned int count, int plus)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
				_nfs4_proc_readdir(dentry, cred, cookie,
					page, count, plus),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
		struct iattr *sattr, dev_t rdev)
{
2815 2816 2817
	struct nfs4_createdata *data;
	int mode = sattr->ia_mode;
	int status = -ENOMEM;
L
Linus Torvalds 已提交
2818 2819 2820

	BUG_ON(!(sattr->ia_valid & ATTR_MODE));
	BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2821 2822 2823 2824 2825

	data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
	if (data == NULL)
		goto out;

L
Linus Torvalds 已提交
2826
	if (S_ISFIFO(mode))
2827
		data->arg.ftype = NF4FIFO;
L
Linus Torvalds 已提交
2828
	else if (S_ISBLK(mode)) {
2829 2830 2831
		data->arg.ftype = NF4BLK;
		data->arg.u.device.specdata1 = MAJOR(rdev);
		data->arg.u.device.specdata2 = MINOR(rdev);
L
Linus Torvalds 已提交
2832 2833
	}
	else if (S_ISCHR(mode)) {
2834 2835 2836
		data->arg.ftype = NF4CHR;
		data->arg.u.device.specdata1 = MAJOR(rdev);
		data->arg.u.device.specdata2 = MINOR(rdev);
L
Linus Torvalds 已提交
2837 2838
	}
	
2839 2840 2841 2842
	status = nfs4_do_create(dir, dentry, data);

	nfs4_free_createdata(data);
out:
L
Linus Torvalds 已提交
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
	return status;
}

static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
		struct iattr *sattr, dev_t rdev)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(dir),
				_nfs4_proc_mknod(dir, dentry, sattr, rdev),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
		 struct nfs_fsstat *fsstat)
{
	struct nfs4_statfs_arg args = {
		.fh = fhandle,
		.bitmask = server->attr_bitmask,
	};
B
Benny Halevy 已提交
2866 2867 2868
	struct nfs4_statfs_res res = {
		.fsstat = fsstat,
	};
L
Linus Torvalds 已提交
2869 2870 2871
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
		.rpc_argp = &args,
B
Benny Halevy 已提交
2872
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2873 2874
	};

2875
	nfs_fattr_init(fsstat->fattr);
A
Andy Adamson 已提交
2876
	return  nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897
}

static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(server,
				_nfs4_proc_statfs(server, fhandle, fsstat),
				&exception);
	} while (exception.retry);
	return err;
}

static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_fsinfo *fsinfo)
{
	struct nfs4_fsinfo_arg args = {
		.fh = fhandle,
		.bitmask = server->attr_bitmask,
	};
B
Benny Halevy 已提交
2898 2899 2900
	struct nfs4_fsinfo_res res = {
		.fsinfo = fsinfo,
	};
L
Linus Torvalds 已提交
2901 2902 2903
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
		.rpc_argp = &args,
B
Benny Halevy 已提交
2904
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2905 2906
	};

A
Andy Adamson 已提交
2907
	return nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924
}

static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
{
	struct nfs4_exception exception = { };
	int err;

	do {
		err = nfs4_handle_exception(server,
				_nfs4_do_fsinfo(server, fhandle, fsinfo),
				&exception);
	} while (exception.retry);
	return err;
}

static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
{
2925
	nfs_fattr_init(fsinfo->fattr);
L
Linus Torvalds 已提交
2926 2927 2928 2929 2930 2931 2932 2933 2934 2935
	return nfs4_do_fsinfo(server, fhandle, fsinfo);
}

static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_pathconf *pathconf)
{
	struct nfs4_pathconf_arg args = {
		.fh = fhandle,
		.bitmask = server->attr_bitmask,
	};
B
Benny Halevy 已提交
2936 2937 2938
	struct nfs4_pathconf_res res = {
		.pathconf = pathconf,
	};
L
Linus Torvalds 已提交
2939 2940 2941
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
		.rpc_argp = &args,
B
Benny Halevy 已提交
2942
		.rpc_resp = &res,
L
Linus Torvalds 已提交
2943 2944 2945 2946 2947 2948 2949 2950
	};

	/* None of the pathconf attributes are mandatory to implement */
	if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
		memset(pathconf, 0, sizeof(*pathconf));
		return 0;
	}

2951
	nfs_fattr_init(pathconf->fattr);
A
Andy Adamson 已提交
2952
	return nfs4_call_sync(server, &msg, &args, &res, 0);
L
Linus Torvalds 已提交
2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968
}

static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_pathconf *pathconf)
{
	struct nfs4_exception exception = { };
	int err;

	do {
		err = nfs4_handle_exception(server,
				_nfs4_proc_pathconf(server, fhandle, pathconf),
				&exception);
	} while (exception.retry);
	return err;
}

T
Trond Myklebust 已提交
2969
static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
L
Linus Torvalds 已提交
2970
{
T
Trond Myklebust 已提交
2971
	struct nfs_server *server = NFS_SERVER(data->inode);
L
Linus Torvalds 已提交
2972

2973 2974 2975 2976
	dprintk("--> %s\n", __func__);

	nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);

2977
	if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2978
		nfs4_restart_rpc(task, server->nfs_client);
T
Trond Myklebust 已提交
2979
		return -EAGAIN;
L
Linus Torvalds 已提交
2980
	}
2981 2982

	nfs_invalidate_atime(data->inode);
L
Linus Torvalds 已提交
2983
	if (task->tk_status > 0)
T
Trond Myklebust 已提交
2984 2985
		renew_lease(server, data->timestamp);
	return 0;
L
Linus Torvalds 已提交
2986 2987
}

2988
static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
2989 2990
{
	data->timestamp   = jiffies;
2991
	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
L
Linus Torvalds 已提交
2992 2993
}

2994
static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
L
Linus Torvalds 已提交
2995 2996 2997
{
	struct inode *inode = data->inode;
	
2998 2999 3000
	nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
			   task->tk_status);

3001
	if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3002
		nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3003
		return -EAGAIN;
L
Linus Torvalds 已提交
3004
	}
3005
	if (task->tk_status >= 0) {
L
Linus Torvalds 已提交
3006
		renew_lease(NFS_SERVER(inode), data->timestamp);
3007
		nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3008
	}
3009
	return 0;
L
Linus Torvalds 已提交
3010 3011
}

3012
static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
3013
{
3014 3015
	struct nfs_server *server = NFS_SERVER(data->inode);

3016
	data->args.bitmask = server->cache_consistency_bitmask;
3017
	data->res.server = server;
L
Linus Torvalds 已提交
3018 3019
	data->timestamp   = jiffies;

3020
	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
L
Linus Torvalds 已提交
3021 3022
}

3023
static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
L
Linus Torvalds 已提交
3024 3025 3026
{
	struct inode *inode = data->inode;
	
3027 3028
	nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
			   task->tk_status);
3029
	if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3030
		nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3031
		return -EAGAIN;
L
Linus Torvalds 已提交
3032
	}
3033
	nfs_refresh_inode(inode, data->res.fattr);
3034
	return 0;
L
Linus Torvalds 已提交
3035 3036
}

3037
static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
3038
{
3039
	struct nfs_server *server = NFS_SERVER(data->inode);
L
Linus Torvalds 已提交
3040
	
3041
	data->args.bitmask = server->cache_consistency_bitmask;
3042
	data->res.server = server;
3043
	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
L
Linus Torvalds 已提交
3044 3045 3046 3047 3048 3049
}

/*
 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
 * standalone procedure for queueing an asynchronous RENEW.
 */
3050
static void nfs4_renew_done(struct rpc_task *task, void *data)
L
Linus Torvalds 已提交
3051
{
3052
	struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3053
	unsigned long timestamp = (unsigned long)data;
L
Linus Torvalds 已提交
3054 3055

	if (task->tk_status < 0) {
3056 3057 3058
		/* Unless we're shutting down, schedule state recovery! */
		if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
			nfs4_schedule_state_recovery(clp);
L
Linus Torvalds 已提交
3059 3060 3061 3062 3063 3064 3065 3066
		return;
	}
	spin_lock(&clp->cl_lock);
	if (time_before(clp->cl_last_renewal,timestamp))
		clp->cl_last_renewal = timestamp;
	spin_unlock(&clp->cl_lock);
}

3067 3068 3069 3070
static const struct rpc_call_ops nfs4_renew_ops = {
	.rpc_call_done = nfs4_renew_done,
};

3071
int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
L
Linus Torvalds 已提交
3072 3073 3074 3075
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_RENEW],
		.rpc_argp	= clp,
3076
		.rpc_cred	= cred,
L
Linus Torvalds 已提交
3077 3078 3079
	};

	return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3080
			&nfs4_renew_ops, (void *)jiffies);
L
Linus Torvalds 已提交
3081 3082
}

3083
int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
L
Linus Torvalds 已提交
3084 3085 3086 3087
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_RENEW],
		.rpc_argp	= clp,
3088
		.rpc_cred	= cred,
L
Linus Torvalds 已提交
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102
	};
	unsigned long now = jiffies;
	int status;

	status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
	if (status < 0)
		return status;
	spin_lock(&clp->cl_lock);
	if (time_before(clp->cl_last_renewal,now))
		clp->cl_last_renewal = now;
	spin_unlock(&clp->cl_lock);
	return 0;
}

3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128
static inline int nfs4_server_supports_acls(struct nfs_server *server)
{
	return (server->caps & NFS_CAP_ACLS)
		&& (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
		&& (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
}

/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
 * the stack.
 */
#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)

static void buf_to_pages(const void *buf, size_t buflen,
		struct page **pages, unsigned int *pgbase)
{
	const void *p = buf;

	*pgbase = offset_in_page(buf);
	p -= *pgbase;
	while (p < buf + buflen) {
		*(pages++) = virt_to_page(p);
		p += PAGE_CACHE_SIZE;
	}
}

3129 3130 3131
struct nfs4_cached_acl {
	int cached;
	size_t len;
A
Andrew Morton 已提交
3132
	char data[0];
3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195
};

static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
{
	struct nfs_inode *nfsi = NFS_I(inode);

	spin_lock(&inode->i_lock);
	kfree(nfsi->nfs4_acl);
	nfsi->nfs4_acl = acl;
	spin_unlock(&inode->i_lock);
}

static void nfs4_zap_acl_attr(struct inode *inode)
{
	nfs4_set_cached_acl(inode, NULL);
}

static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
{
	struct nfs_inode *nfsi = NFS_I(inode);
	struct nfs4_cached_acl *acl;
	int ret = -ENOENT;

	spin_lock(&inode->i_lock);
	acl = nfsi->nfs4_acl;
	if (acl == NULL)
		goto out;
	if (buf == NULL) /* user is just asking for length */
		goto out_len;
	if (acl->cached == 0)
		goto out;
	ret = -ERANGE; /* see getxattr(2) man page */
	if (acl->len > buflen)
		goto out;
	memcpy(buf, acl->data, acl->len);
out_len:
	ret = acl->len;
out:
	spin_unlock(&inode->i_lock);
	return ret;
}

static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
{
	struct nfs4_cached_acl *acl;

	if (buf && acl_len <= PAGE_SIZE) {
		acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
		if (acl == NULL)
			goto out;
		acl->cached = 1;
		memcpy(acl->data, buf, acl_len);
	} else {
		acl = kmalloc(sizeof(*acl), GFP_KERNEL);
		if (acl == NULL)
			goto out;
		acl->cached = 0;
	}
	acl->len = acl_len;
out:
	nfs4_set_cached_acl(inode, acl);
}

3196
static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3197 3198 3199 3200 3201 3202 3203
{
	struct page *pages[NFS4ACL_MAXPAGES];
	struct nfs_getaclargs args = {
		.fh = NFS_FH(inode),
		.acl_pages = pages,
		.acl_len = buflen,
	};
B
Benny Halevy 已提交
3204 3205 3206
	struct nfs_getaclres res = {
		.acl_len = buflen,
	};
3207
	void *resp_buf;
3208 3209 3210
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
		.rpc_argp = &args,
B
Benny Halevy 已提交
3211
		.rpc_resp = &res,
3212
	};
3213
	struct page *localpage = NULL;
3214 3215
	int ret;

3216 3217 3218 3219 3220 3221 3222 3223 3224
	if (buflen < PAGE_SIZE) {
		/* As long as we're doing a round trip to the server anyway,
		 * let's be prepared for a page of acl data. */
		localpage = alloc_page(GFP_KERNEL);
		resp_buf = page_address(localpage);
		if (localpage == NULL)
			return -ENOMEM;
		args.acl_pages[0] = localpage;
		args.acl_pgbase = 0;
B
Benny Halevy 已提交
3225
		args.acl_len = PAGE_SIZE;
3226 3227 3228 3229
	} else {
		resp_buf = buf;
		buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
	}
A
Andy Adamson 已提交
3230
	ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3231 3232
	if (ret)
		goto out_free;
B
Benny Halevy 已提交
3233 3234
	if (res.acl_len > args.acl_len)
		nfs4_write_cached_acl(inode, NULL, res.acl_len);
3235
	else
B
Benny Halevy 已提交
3236
		nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3237 3238
	if (buf) {
		ret = -ERANGE;
B
Benny Halevy 已提交
3239
		if (res.acl_len > buflen)
3240 3241
			goto out_free;
		if (localpage)
B
Benny Halevy 已提交
3242
			memcpy(buf, resp_buf, res.acl_len);
3243
	}
B
Benny Halevy 已提交
3244
	ret = res.acl_len;
3245 3246 3247
out_free:
	if (localpage)
		__free_page(localpage);
3248 3249 3250
	return ret;
}

3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263
static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
{
	struct nfs4_exception exception = { };
	ssize_t ret;
	do {
		ret = __nfs4_get_acl_uncached(inode, buf, buflen);
		if (ret >= 0)
			break;
		ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
	} while (exception.retry);
	return ret;
}

3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
{
	struct nfs_server *server = NFS_SERVER(inode);
	int ret;

	if (!nfs4_server_supports_acls(server))
		return -EOPNOTSUPP;
	ret = nfs_revalidate_inode(server, inode);
	if (ret < 0)
		return ret;
	ret = nfs4_read_cached_acl(inode, buf, buflen);
	if (ret != -ENOENT)
		return ret;
	return nfs4_get_acl_uncached(inode, buf, buflen);
}

3280
static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3281 3282 3283 3284 3285 3286 3287 3288
{
	struct nfs_server *server = NFS_SERVER(inode);
	struct page *pages[NFS4ACL_MAXPAGES];
	struct nfs_setaclargs arg = {
		.fh		= NFS_FH(inode),
		.acl_pages	= pages,
		.acl_len	= buflen,
	};
B
Benny Halevy 已提交
3289
	struct nfs_setaclres res;
3290 3291 3292
	struct rpc_message msg = {
		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_SETACL],
		.rpc_argp	= &arg,
B
Benny Halevy 已提交
3293
		.rpc_resp	= &res,
3294 3295 3296 3297 3298
	};
	int ret;

	if (!nfs4_server_supports_acls(server))
		return -EOPNOTSUPP;
3299
	nfs_inode_return_delegation(inode);
3300
	buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
A
Andy Adamson 已提交
3301
	ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3302 3303
	nfs_access_zap_cache(inode);
	nfs_zap_acl_cache(inode);
3304 3305 3306
	return ret;
}

3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318
static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
{
	struct nfs4_exception exception = { };
	int err;
	do {
		err = nfs4_handle_exception(NFS_SERVER(inode),
				__nfs4_proc_set_acl(inode, buf, buflen),
				&exception);
	} while (exception.retry);
	return err;
}

L
Linus Torvalds 已提交
3319
static int
3320
_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
L
Linus Torvalds 已提交
3321 3322 3323 3324
{
	if (!clp || task->tk_status >= 0)
		return 0;
	switch(task->tk_status) {
3325 3326 3327 3328 3329 3330
		case -NFS4ERR_ADMIN_REVOKED:
		case -NFS4ERR_BAD_STATEID:
		case -NFS4ERR_OPENMODE:
			if (state == NULL)
				break;
			nfs4_state_mark_reclaim_nograce(clp, state);
L
Linus Torvalds 已提交
3331 3332 3333
		case -NFS4ERR_STALE_CLIENTID:
		case -NFS4ERR_STALE_STATEID:
		case -NFS4ERR_EXPIRED:
3334
			rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
L
Linus Torvalds 已提交
3335
			nfs4_schedule_state_recovery(clp);
3336
			if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3337
				rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
L
Linus Torvalds 已提交
3338 3339
			task->tk_status = 0;
			return -EAGAIN;
3340 3341 3342 3343 3344 3345 3346 3347 3348 3349
#if defined(CONFIG_NFS_V4_1)
		case -NFS4ERR_BADSESSION:
		case -NFS4ERR_BADSLOT:
		case -NFS4ERR_BAD_HIGH_SLOT:
		case -NFS4ERR_DEADSESSION:
		case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
		case -NFS4ERR_SEQ_FALSE_RETRY:
		case -NFS4ERR_SEQ_MISORDERED:
			dprintk("%s ERROR %d, Reset session\n", __func__,
				task->tk_status);
3350
			nfs4_schedule_state_recovery(clp);
3351 3352 3353
			task->tk_status = 0;
			return -EAGAIN;
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
3354
		case -NFS4ERR_DELAY:
3355 3356
			if (server)
				nfs_inc_server_stats(server, NFSIOS_DELAY);
3357
		case -NFS4ERR_GRACE:
L
Linus Torvalds 已提交
3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368
			rpc_delay(task, NFS4_POLL_RETRY_MAX);
			task->tk_status = 0;
			return -EAGAIN;
		case -NFS4ERR_OLD_STATEID:
			task->tk_status = 0;
			return -EAGAIN;
	}
	task->tk_status = nfs4_map_errors(task->tk_status);
	return 0;
}

3369 3370 3371 3372 3373 3374
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
{
	return _nfs4_async_handle_error(task, server, server->nfs_client, state);
}

3375
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385
{
	nfs4_verifier sc_verifier;
	struct nfs4_setclientid setclientid = {
		.sc_verifier = &sc_verifier,
		.sc_prog = program,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
		.rpc_argp = &setclientid,
		.rpc_resp = clp,
3386
		.rpc_cred = cred,
L
Linus Torvalds 已提交
3387
	};
A
Al Viro 已提交
3388
	__be32 *p;
L
Linus Torvalds 已提交
3389 3390 3391
	int loop = 0;
	int status;

A
Al Viro 已提交
3392
	p = (__be32*)sc_verifier.data;
L
Linus Torvalds 已提交
3393 3394 3395 3396 3397
	*p++ = htonl((u32)clp->cl_boot_time.tv_sec);
	*p = htonl((u32)clp->cl_boot_time.tv_nsec);

	for(;;) {
		setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3398
				sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3399 3400 3401
				clp->cl_ipaddr,
				rpc_peeraddr2str(clp->cl_rpcclient,
							RPC_DISPLAY_ADDR),
3402 3403
				rpc_peeraddr2str(clp->cl_rpcclient,
							RPC_DISPLAY_PROTO),
3404
				clp->cl_rpcclient->cl_auth->au_ops->au_name,
L
Linus Torvalds 已提交
3405 3406
				clp->cl_id_uniquifier);
		setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3407 3408 3409
				sizeof(setclientid.sc_netid),
				rpc_peeraddr2str(clp->cl_rpcclient,
							RPC_DISPLAY_NETID));
L
Linus Torvalds 已提交
3410
		setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3411
				sizeof(setclientid.sc_uaddr), "%s.%u.%u",
L
Linus Torvalds 已提交
3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427
				clp->cl_ipaddr, port >> 8, port & 255);

		status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
		if (status != -NFS4ERR_CLID_INUSE)
			break;
		if (signalled())
			break;
		if (loop++ & 1)
			ssleep(clp->cl_lease_time + 1);
		else
			if (++clp->cl_id_uniquifier == 0)
				break;
	}
	return status;
}

3428
static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
L
Linus Torvalds 已提交
3429 3430 3431 3432 3433 3434
{
	struct nfs_fsinfo fsinfo;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
		.rpc_argp = clp,
		.rpc_resp = &fsinfo,
3435
		.rpc_cred = cred,
L
Linus Torvalds 已提交
3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450
	};
	unsigned long now;
	int status;

	now = jiffies;
	status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
	if (status == 0) {
		spin_lock(&clp->cl_lock);
		clp->cl_lease_time = fsinfo.lease_time * HZ;
		clp->cl_last_renewal = now;
		spin_unlock(&clp->cl_lock);
	}
	return status;
}

3451
int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3452
{
3453
	long timeout = 0;
3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468
	int err;
	do {
		err = _nfs4_proc_setclientid_confirm(clp, cred);
		switch (err) {
			case 0:
				return err;
			case -NFS4ERR_RESOURCE:
				/* The IBM lawyers misread another document! */
			case -NFS4ERR_DELAY:
				err = nfs4_delay(clp->cl_rpcclient, &timeout);
		}
	} while (err == 0);
	return err;
}

3469 3470
struct nfs4_delegreturndata {
	struct nfs4_delegreturnargs args;
3471
	struct nfs4_delegreturnres res;
3472 3473
	struct nfs_fh fh;
	nfs4_stateid stateid;
3474
	unsigned long timestamp;
3475
	struct nfs_fattr fattr;
3476 3477 3478 3479 3480 3481
	int rpc_status;
};

static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
{
	struct nfs4_delegreturndata *data = calldata;
3482

3483 3484
	nfs4_sequence_done(data->res.server, &data->res.seq_res,
			task->tk_status);
3485

3486
	data->rpc_status = task->tk_status;
3487
	if (data->rpc_status == 0)
3488
		renew_lease(data->res.server, data->timestamp);
3489 3490 3491 3492 3493 3494 3495
}

static void nfs4_delegreturn_release(void *calldata)
{
	kfree(calldata);
}

3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
#if defined(CONFIG_NFS_V4_1)
static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
{
	struct nfs4_delegreturndata *d_data;

	d_data = (struct nfs4_delegreturndata *)data;

	if (nfs4_setup_sequence(d_data->res.server->nfs_client,
				&d_data->args.seq_args,
				&d_data->res.seq_res, 1, task))
		return;
	rpc_call_start(task);
}
#endif /* CONFIG_NFS_V4_1 */

3511
static const struct rpc_call_ops nfs4_delegreturn_ops = {
3512 3513 3514
#if defined(CONFIG_NFS_V4_1)
	.rpc_call_prepare = nfs4_delegreturn_prepare,
#endif /* CONFIG_NFS_V4_1 */
3515 3516 3517 3518
	.rpc_call_done = nfs4_delegreturn_done,
	.rpc_release = nfs4_delegreturn_release,
};

3519
static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3520 3521
{
	struct nfs4_delegreturndata *data;
3522
	struct nfs_server *server = NFS_SERVER(inode);
3523
	struct rpc_task *task;
3524 3525 3526 3527
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
		.rpc_cred = cred,
	};
T
Trond Myklebust 已提交
3528 3529
	struct rpc_task_setup task_setup_data = {
		.rpc_client = server->client,
3530
		.rpc_message = &msg,
T
Trond Myklebust 已提交
3531 3532 3533
		.callback_ops = &nfs4_delegreturn_ops,
		.flags = RPC_TASK_ASYNC,
	};
3534
	int status = 0;
3535

3536
	data = kzalloc(sizeof(*data), GFP_KERNEL);
3537 3538 3539 3540
	if (data == NULL)
		return -ENOMEM;
	data->args.fhandle = &data->fh;
	data->args.stateid = &data->stateid;
3541
	data->args.bitmask = server->attr_bitmask;
3542 3543
	nfs_copy_fh(&data->fh, NFS_FH(inode));
	memcpy(&data->stateid, stateid, sizeof(data->stateid));
3544 3545
	data->res.fattr = &data->fattr;
	data->res.server = server;
A
Andy Adamson 已提交
3546
	data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3547
	nfs_fattr_init(data->res.fattr);
3548
	data->timestamp = jiffies;
3549 3550
	data->rpc_status = 0;

T
Trond Myklebust 已提交
3551
	task_setup_data.callback_data = data;
3552 3553
	msg.rpc_argp = &data->args,
	msg.rpc_resp = &data->res,
T
Trond Myklebust 已提交
3554
	task = rpc_run_task(&task_setup_data);
3555
	if (IS_ERR(task))
3556
		return PTR_ERR(task);
3557 3558
	if (!issync)
		goto out;
3559
	status = nfs4_wait_for_completion_rpc_task(task);
3560 3561 3562 3563 3564 3565 3566
	if (status != 0)
		goto out;
	status = data->rpc_status;
	if (status != 0)
		goto out;
	nfs_refresh_inode(inode, &data->fattr);
out:
3567
	rpc_put_task(task);
3568
	return status;
L
Linus Torvalds 已提交
3569 3570
}

3571
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
L
Linus Torvalds 已提交
3572 3573 3574 3575 3576
{
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs4_exception exception = { };
	int err;
	do {
3577
		err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
L
Linus Torvalds 已提交
3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597
		switch (err) {
			case -NFS4ERR_STALE_STATEID:
			case -NFS4ERR_EXPIRED:
			case 0:
				return 0;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);
	return err;
}

#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)

/* 
 * sleep, with exponential backoff, and retry the LOCK operation. 
 */
static unsigned long
nfs4_set_lock_task_retry(unsigned long timeout)
{
3598
	schedule_timeout_killable(timeout);
L
Linus Torvalds 已提交
3599 3600 3601 3602 3603 3604 3605 3606 3607 3608
	timeout <<= 1;
	if (timeout > NFS4_LOCK_MAXTIMEOUT)
		return NFS4_LOCK_MAXTIMEOUT;
	return timeout;
}

static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
	struct inode *inode = state->inode;
	struct nfs_server *server = NFS_SERVER(inode);
3609
	struct nfs_client *clp = server->nfs_client;
T
Trond Myklebust 已提交
3610
	struct nfs_lockt_args arg = {
L
Linus Torvalds 已提交
3611
		.fh = NFS_FH(inode),
T
Trond Myklebust 已提交
3612
		.fl = request,
L
Linus Torvalds 已提交
3613
	};
T
Trond Myklebust 已提交
3614 3615
	struct nfs_lockt_res res = {
		.denied = request,
L
Linus Torvalds 已提交
3616 3617 3618 3619 3620 3621 3622 3623 3624 3625
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
		.rpc_argp       = &arg,
		.rpc_resp       = &res,
		.rpc_cred	= state->owner->so_cred,
	};
	struct nfs4_lock_state *lsp;
	int status;

T
Trond Myklebust 已提交
3626
	arg.lock_owner.clientid = clp->cl_clientid;
3627 3628 3629 3630
	status = nfs4_set_lock_state(state, request);
	if (status != 0)
		goto out;
	lsp = request->fl_u.nfs4_fl.owner;
3631
	arg.lock_owner.id = lsp->ls_id.id;
A
Andy Adamson 已提交
3632
	status = nfs4_call_sync(server, &msg, &arg, &res, 1);
T
Trond Myklebust 已提交
3633 3634 3635 3636 3637 3638
	switch (status) {
		case 0:
			request->fl_type = F_UNLCK;
			break;
		case -NFS4ERR_DENIED:
			status = 0;
L
Linus Torvalds 已提交
3639
	}
3640
	request->fl_ops->fl_release_private(request);
3641
out:
L
Linus Torvalds 已提交
3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673
	return status;
}

static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
	struct nfs4_exception exception = { };
	int err;

	do {
		err = nfs4_handle_exception(NFS_SERVER(state->inode),
				_nfs4_proc_getlk(state, cmd, request),
				&exception);
	} while (exception.retry);
	return err;
}

static int do_vfs_lock(struct file *file, struct file_lock *fl)
{
	int res = 0;
	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
		case FL_POSIX:
			res = posix_lock_file_wait(file, fl);
			break;
		case FL_FLOCK:
			res = flock_lock_file_wait(file, fl);
			break;
		default:
			BUG();
	}
	return res;
}

3674
struct nfs4_unlockdata {
T
Trond Myklebust 已提交
3675 3676
	struct nfs_locku_args arg;
	struct nfs_locku_res res;
3677 3678
	struct nfs4_lock_state *lsp;
	struct nfs_open_context *ctx;
T
Trond Myklebust 已提交
3679 3680
	struct file_lock fl;
	const struct nfs_server *server;
3681
	unsigned long timestamp;
3682 3683
};

T
Trond Myklebust 已提交
3684 3685 3686 3687 3688 3689 3690 3691
static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
		struct nfs_open_context *ctx,
		struct nfs4_lock_state *lsp,
		struct nfs_seqid *seqid)
{
	struct nfs4_unlockdata *p;
	struct inode *inode = lsp->ls_state->inode;

3692
	p = kzalloc(sizeof(*p), GFP_KERNEL);
T
Trond Myklebust 已提交
3693 3694 3695 3696 3697
	if (p == NULL)
		return NULL;
	p->arg.fh = NFS_FH(inode);
	p->arg.fl = &p->fl;
	p->arg.seqid = seqid;
3698
	p->res.seqid = seqid;
A
Andy Adamson 已提交
3699
	p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
T
Trond Myklebust 已提交
3700 3701 3702 3703 3704 3705 3706 3707 3708 3709
	p->arg.stateid = &lsp->ls_stateid;
	p->lsp = lsp;
	atomic_inc(&lsp->ls_count);
	/* Ensure we don't close file until we're done freeing locks! */
	p->ctx = get_nfs_open_context(ctx);
	memcpy(&p->fl, fl, sizeof(p->fl));
	p->server = NFS_SERVER(inode);
	return p;
}

3710
static void nfs4_locku_release_calldata(void *data)
3711
{
3712
	struct nfs4_unlockdata *calldata = data;
T
Trond Myklebust 已提交
3713
	nfs_free_seqid(calldata->arg.seqid);
3714 3715 3716
	nfs4_put_lock_state(calldata->lsp);
	put_nfs_open_context(calldata->ctx);
	kfree(calldata);
3717 3718
}

3719
static void nfs4_locku_done(struct rpc_task *task, void *data)
3720
{
3721
	struct nfs4_unlockdata *calldata = data;
3722

3723 3724
	nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
			   task->tk_status);
3725 3726
	if (RPC_ASSASSINATED(task))
		return;
3727 3728 3729
	switch (task->tk_status) {
		case 0:
			memcpy(calldata->lsp->ls_stateid.data,
T
Trond Myklebust 已提交
3730
					calldata->res.stateid.data,
3731
					sizeof(calldata->lsp->ls_stateid.data));
3732
			renew_lease(calldata->server, calldata->timestamp);
3733
			break;
3734 3735
		case -NFS4ERR_BAD_STATEID:
		case -NFS4ERR_OLD_STATEID:
3736 3737 3738 3739
		case -NFS4ERR_STALE_STATEID:
		case -NFS4ERR_EXPIRED:
			break;
		default:
3740
			if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3741
				nfs4_restart_rpc(task,
3742
						 calldata->server->nfs_client);
3743 3744 3745
	}
}

T
Trond Myklebust 已提交
3746
static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3747
{
T
Trond Myklebust 已提交
3748
	struct nfs4_unlockdata *calldata = data;
3749

T
Trond Myklebust 已提交
3750
	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3751 3752
		return;
	if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3753 3754
		/* Note: exit _without_ running nfs4_locku_done */
		task->tk_action = NULL;
3755 3756
		return;
	}
3757
	calldata->timestamp = jiffies;
3758 3759 3760 3761
	if (nfs4_setup_sequence(calldata->server->nfs_client,
				&calldata->arg.seq_args,
				&calldata->res.seq_res, 1, task))
		return;
3762
	rpc_call_start(task);
3763 3764
}

3765
static const struct rpc_call_ops nfs4_locku_ops = {
T
Trond Myklebust 已提交
3766
	.rpc_call_prepare = nfs4_locku_prepare,
3767
	.rpc_call_done = nfs4_locku_done,
3768
	.rpc_release = nfs4_locku_release_calldata,
3769 3770
};

3771 3772 3773 3774 3775 3776
static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
		struct nfs_open_context *ctx,
		struct nfs4_lock_state *lsp,
		struct nfs_seqid *seqid)
{
	struct nfs4_unlockdata *data;
3777 3778 3779 3780
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
		.rpc_cred = ctx->cred,
	};
T
Trond Myklebust 已提交
3781 3782
	struct rpc_task_setup task_setup_data = {
		.rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3783
		.rpc_message = &msg,
T
Trond Myklebust 已提交
3784
		.callback_ops = &nfs4_locku_ops,
3785
		.workqueue = nfsiod_workqueue,
T
Trond Myklebust 已提交
3786 3787
		.flags = RPC_TASK_ASYNC,
	};
3788

3789 3790 3791 3792 3793
	/* Ensure this is an unlock - when canceling a lock, the
	 * canceled lock is passed in, and it won't be an unlock.
	 */
	fl->fl_type = F_UNLCK;

3794 3795 3796 3797 3798 3799
	data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
	if (data == NULL) {
		nfs_free_seqid(seqid);
		return ERR_PTR(-ENOMEM);
	}

3800 3801
	msg.rpc_argp = &data->arg,
	msg.rpc_resp = &data->res,
T
Trond Myklebust 已提交
3802 3803
	task_setup_data.callback_data = data;
	return rpc_run_task(&task_setup_data);
3804 3805
}

3806 3807
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
{
3808
	struct nfs_inode *nfsi = NFS_I(state->inode);
T
Trond Myklebust 已提交
3809
	struct nfs_seqid *seqid;
L
Linus Torvalds 已提交
3810
	struct nfs4_lock_state *lsp;
3811 3812
	struct rpc_task *task;
	int status = 0;
3813
	unsigned char fl_flags = request->fl_flags;
3814

3815
	status = nfs4_set_lock_state(state, request);
3816 3817
	/* Unlock _before_ we do the RPC call */
	request->fl_flags |= FL_EXISTS;
3818 3819 3820
	down_read(&nfsi->rwsem);
	if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
		up_read(&nfsi->rwsem);
3821
		goto out;
3822 3823
	}
	up_read(&nfsi->rwsem);
3824
	if (status != 0)
3825 3826 3827 3828
		goto out;
	/* Is this a delegated lock? */
	if (test_bit(NFS_DELEGATED_STATE, &state->flags))
		goto out;
3829
	lsp = request->fl_u.nfs4_fl.owner;
T
Trond Myklebust 已提交
3830
	seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3831
	status = -ENOMEM;
T
Trond Myklebust 已提交
3832
	if (seqid == NULL)
3833
		goto out;
3834
	task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3835 3836
	status = PTR_ERR(task);
	if (IS_ERR(task))
3837
		goto out;
3838
	status = nfs4_wait_for_completion_rpc_task(task);
3839
	rpc_put_task(task);
3840
out:
3841
	request->fl_flags = fl_flags;
L
Linus Torvalds 已提交
3842 3843 3844
	return status;
}

3845 3846 3847 3848 3849 3850
struct nfs4_lockdata {
	struct nfs_lock_args arg;
	struct nfs_lock_res res;
	struct nfs4_lock_state *lsp;
	struct nfs_open_context *ctx;
	struct file_lock fl;
3851
	unsigned long timestamp;
3852 3853
	int rpc_status;
	int cancelled;
3854
	struct nfs_server *server;
3855 3856 3857 3858
};

static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
		struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
L
Linus Torvalds 已提交
3859
{
3860 3861
	struct nfs4_lockdata *p;
	struct inode *inode = lsp->ls_state->inode;
L
Linus Torvalds 已提交
3862
	struct nfs_server *server = NFS_SERVER(inode);
3863 3864 3865 3866 3867 3868 3869

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (p == NULL)
		return NULL;

	p->arg.fh = NFS_FH(inode);
	p->arg.fl = &p->fl;
3870 3871 3872
	p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
	if (p->arg.open_seqid == NULL)
		goto out_free;
3873 3874
	p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
	if (p->arg.lock_seqid == NULL)
3875
		goto out_free_seqid;
3876
	p->arg.lock_stateid = &lsp->ls_stateid;
3877
	p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3878
	p->arg.lock_owner.id = lsp->ls_id.id;
3879
	p->res.lock_seqid = p->arg.lock_seqid;
A
Andy Adamson 已提交
3880
	p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3881
	p->lsp = lsp;
3882
	p->server = server;
3883 3884 3885 3886
	atomic_inc(&lsp->ls_count);
	p->ctx = get_nfs_open_context(ctx);
	memcpy(&p->fl, fl, sizeof(p->fl));
	return p;
3887 3888
out_free_seqid:
	nfs_free_seqid(p->arg.open_seqid);
3889 3890 3891 3892 3893 3894 3895 3896 3897
out_free:
	kfree(p);
	return NULL;
}

static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs4_lockdata *data = calldata;
	struct nfs4_state *state = data->lsp->ls_state;
3898

3899
	dprintk("%s: begin!\n", __func__);
3900 3901
	if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
		return;
3902 3903
	/* Do we need to do an open_to_lock_owner? */
	if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3904 3905
		if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
			return;
3906 3907
		data->arg.open_stateid = &state->stateid;
		data->arg.new_lock_owner = 1;
3908
		data->res.open_seqid = data->arg.open_seqid;
3909 3910
	} else
		data->arg.new_lock_owner = 0;
3911
	data->timestamp = jiffies;
3912 3913 3914
	if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
				&data->res.seq_res, 1, task))
		return;
3915
	rpc_call_start(task);
3916
	dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3917 3918 3919 3920 3921 3922
}

static void nfs4_lock_done(struct rpc_task *task, void *calldata)
{
	struct nfs4_lockdata *data = calldata;

3923
	dprintk("%s: begin!\n", __func__);
3924

3925 3926
	nfs4_sequence_done(data->server, &data->res.seq_res,
			task->tk_status);
3927

3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940
	data->rpc_status = task->tk_status;
	if (RPC_ASSASSINATED(task))
		goto out;
	if (data->arg.new_lock_owner != 0) {
		if (data->rpc_status == 0)
			nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
		else
			goto out;
	}
	if (data->rpc_status == 0) {
		memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
					sizeof(data->lsp->ls_stateid.data));
		data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3941
		renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3942 3943
	}
out:
3944
	dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3945 3946 3947 3948 3949 3950
}

static void nfs4_lock_release(void *calldata)
{
	struct nfs4_lockdata *data = calldata;

3951
	dprintk("%s: begin!\n", __func__);
3952
	nfs_free_seqid(data->arg.open_seqid);
3953 3954 3955 3956 3957
	if (data->cancelled != 0) {
		struct rpc_task *task;
		task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
				data->arg.lock_seqid);
		if (!IS_ERR(task))
3958
			rpc_put_task(task);
3959
		dprintk("%s: cancelling lock!\n", __func__);
3960 3961 3962 3963 3964
	} else
		nfs_free_seqid(data->arg.lock_seqid);
	nfs4_put_lock_state(data->lsp);
	put_nfs_open_context(data->ctx);
	kfree(data);
3965
	dprintk("%s: done!\n", __func__);
3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977
}

static const struct rpc_call_ops nfs4_lock_ops = {
	.rpc_call_prepare = nfs4_lock_prepare,
	.rpc_call_done = nfs4_lock_done,
	.rpc_release = nfs4_lock_release,
};

static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
{
	struct nfs4_lockdata *data;
	struct rpc_task *task;
3978 3979 3980 3981
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
		.rpc_cred = state->owner->so_cred,
	};
T
Trond Myklebust 已提交
3982 3983
	struct rpc_task_setup task_setup_data = {
		.rpc_client = NFS_CLIENT(state->inode),
3984
		.rpc_message = &msg,
T
Trond Myklebust 已提交
3985
		.callback_ops = &nfs4_lock_ops,
3986
		.workqueue = nfsiod_workqueue,
T
Trond Myklebust 已提交
3987 3988
		.flags = RPC_TASK_ASYNC,
	};
3989 3990
	int ret;

3991
	dprintk("%s: begin!\n", __func__);
3992
	data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3993 3994 3995 3996 3997 3998 3999
			fl->fl_u.nfs4_fl.owner);
	if (data == NULL)
		return -ENOMEM;
	if (IS_SETLKW(cmd))
		data->arg.block = 1;
	if (reclaim != 0)
		data->arg.reclaim = 1;
4000 4001
	msg.rpc_argp = &data->arg,
	msg.rpc_resp = &data->res,
T
Trond Myklebust 已提交
4002 4003
	task_setup_data.callback_data = data;
	task = rpc_run_task(&task_setup_data);
4004
	if (IS_ERR(task))
4005 4006 4007 4008 4009 4010
		return PTR_ERR(task);
	ret = nfs4_wait_for_completion_rpc_task(task);
	if (ret == 0) {
		ret = data->rpc_status;
	} else
		data->cancelled = 1;
4011
	rpc_put_task(task);
4012
	dprintk("%s: done, ret = %d!\n", __func__, ret);
4013
	return ret;
L
Linus Torvalds 已提交
4014 4015 4016 4017
}

static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
{
4018 4019 4020 4021 4022
	struct nfs_server *server = NFS_SERVER(state->inode);
	struct nfs4_exception exception = { };
	int err;

	do {
4023 4024 4025
		/* Cache the lock if possible... */
		if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
			return 0;
4026 4027 4028 4029 4030 4031
		err = _nfs4_do_setlk(state, F_SETLK, request, 1);
		if (err != -NFS4ERR_DELAY)
			break;
		nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);
	return err;
L
Linus Torvalds 已提交
4032 4033 4034 4035
}

static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
{
4036 4037 4038 4039
	struct nfs_server *server = NFS_SERVER(state->inode);
	struct nfs4_exception exception = { };
	int err;

4040 4041 4042
	err = nfs4_set_lock_state(state, request);
	if (err != 0)
		return err;
4043
	do {
4044 4045
		if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
			return 0;
4046
		err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4047 4048 4049 4050 4051 4052 4053 4054
		switch (err) {
		default:
			goto out;
		case -NFS4ERR_GRACE:
		case -NFS4ERR_DELAY:
			nfs4_handle_exception(server, err, &exception);
			err = 0;
		}
4055
	} while (exception.retry);
4056
out:
4057
	return err;
L
Linus Torvalds 已提交
4058 4059 4060 4061
}

static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
4062
	struct nfs_inode *nfsi = NFS_I(state->inode);
4063
	unsigned char fl_flags = request->fl_flags;
L
Linus Torvalds 已提交
4064 4065
	int status;

4066 4067 4068 4069
	/* Is this a delegated open? */
	status = nfs4_set_lock_state(state, request);
	if (status != 0)
		goto out;
4070 4071 4072 4073
	request->fl_flags |= FL_ACCESS;
	status = do_vfs_lock(request->fl_file, request);
	if (status < 0)
		goto out;
4074
	down_read(&nfsi->rwsem);
4075 4076 4077
	if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
		/* Yes: cache locks! */
		/* ...but avoid races with delegation recall... */
4078 4079 4080
		request->fl_flags = fl_flags & ~FL_SLEEP;
		status = do_vfs_lock(request->fl_file, request);
		goto out_unlock;
4081
	}
4082 4083
	status = _nfs4_do_setlk(state, cmd, request, 0);
	if (status != 0)
4084
		goto out_unlock;
4085
	/* Note: we always want to sleep here! */
4086
	request->fl_flags = fl_flags | FL_SLEEP;
4087
	if (do_vfs_lock(request->fl_file, request) < 0)
4088
		printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4089
out_unlock:
4090
	up_read(&nfsi->rwsem);
4091 4092
out:
	request->fl_flags = fl_flags;
L
Linus Torvalds 已提交
4093 4094 4095 4096 4097 4098 4099 4100 4101
	return status;
}

static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
	struct nfs4_exception exception = { };
	int err;

	do {
4102 4103 4104
		err = _nfs4_proc_setlk(state, cmd, request);
		if (err == -NFS4ERR_DENIED)
			err = -EAGAIN;
L
Linus Torvalds 已提交
4105
		err = nfs4_handle_exception(NFS_SERVER(state->inode),
4106
				err, &exception);
L
Linus Torvalds 已提交
4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119
	} while (exception.retry);
	return err;
}

static int
nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
{
	struct nfs_open_context *ctx;
	struct nfs4_state *state;
	unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
	int status;

	/* verify open state */
4120
	ctx = nfs_file_open_context(filp);
L
Linus Torvalds 已提交
4121 4122 4123 4124 4125
	state = ctx->state;

	if (request->fl_start < 0 || request->fl_end < 0)
		return -EINVAL;

4126 4127 4128 4129 4130
	if (IS_GETLK(cmd)) {
		if (state != NULL)
			return nfs4_proc_getlk(state, F_GETLK, request);
		return 0;
	}
L
Linus Torvalds 已提交
4131 4132 4133 4134

	if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
		return -EINVAL;

4135 4136 4137 4138 4139
	if (request->fl_type == F_UNLCK) {
		if (state != NULL)
			return nfs4_proc_unlck(state, cmd, request);
		return 0;
	}
L
Linus Torvalds 已提交
4140

4141 4142
	if (state == NULL)
		return -ENOLCK;
L
Linus Torvalds 已提交
4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154
	do {
		status = nfs4_proc_setlk(state, cmd, request);
		if ((status != -EAGAIN) || IS_SETLK(cmd))
			break;
		timeout = nfs4_set_lock_task_retry(timeout);
		status = -ERESTARTSYS;
		if (signalled())
			break;
	} while(status < 0);
	return status;
}

4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165
int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
{
	struct nfs_server *server = NFS_SERVER(state->inode);
	struct nfs4_exception exception = { };
	int err;

	err = nfs4_set_lock_state(state, fl);
	if (err != 0)
		goto out;
	do {
		err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4166 4167 4168 4169 4170
		switch (err) {
			default:
				printk(KERN_ERR "%s: unhandled error %d.\n",
						__func__, err);
			case 0:
4171
			case -ESTALE:
4172 4173 4174
				goto out;
			case -NFS4ERR_EXPIRED:
			case -NFS4ERR_STALE_CLIENTID:
4175
			case -NFS4ERR_STALE_STATEID:
4176 4177
				nfs4_schedule_state_recovery(server->nfs_client);
				goto out;
4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193
			case -ERESTARTSYS:
				/*
				 * The show must go on: exit, but mark the
				 * stateid as needing recovery.
				 */
			case -NFS4ERR_ADMIN_REVOKED:
			case -NFS4ERR_BAD_STATEID:
			case -NFS4ERR_OPENMODE:
				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
				err = 0;
				goto out;
			case -ENOMEM:
			case -NFS4ERR_DENIED:
				/* kill_proc(fl->fl_pid, SIGLOST, 1); */
				err = 0;
				goto out;
4194 4195 4196
			case -NFS4ERR_DELAY:
				break;
		}
4197 4198 4199 4200 4201
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);
out:
	return err;
}
4202

4203 4204
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"

4205 4206 4207
int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
		size_t buflen, int flags)
{
4208 4209 4210 4211 4212 4213
	struct inode *inode = dentry->d_inode;

	if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
		return -EOPNOTSUPP;

	return nfs4_proc_set_acl(inode, buf, buflen);
4214 4215 4216 4217 4218 4219 4220 4221 4222
}

/* The getxattr man page suggests returning -ENODATA for unknown attributes,
 * and that's what we'll do for e.g. user attributes that haven't been set.
 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
 * attributes in kernel-managed attribute namespaces. */
ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
		size_t buflen)
{
4223 4224 4225 4226 4227 4228
	struct inode *inode = dentry->d_inode;

	if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
		return -EOPNOTSUPP;

	return nfs4_proc_get_acl(inode, buf, buflen);
4229 4230 4231 4232
}

ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
{
4233
	size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4234

4235 4236
	if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
		return 0;
4237 4238 4239
	if (buf && buflen < len)
		return -ERANGE;
	if (buf)
4240 4241
		memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
	return len;
4242 4243
}

4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256
static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
{
	if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
		(fattr->valid & NFS_ATTR_FATTR_FSID) &&
		(fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
		return;

	fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
		NFS_ATTR_FATTR_NLINK;
	fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
	fattr->nlink = 2;
}

4257
int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4258
		struct nfs4_fs_locations *fs_locations, struct page *page)
4259 4260 4261
{
	struct nfs_server *server = NFS_SERVER(dir);
	u32 bitmask[2] = {
4262 4263
		[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
		[1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4264 4265 4266
	};
	struct nfs4_fs_locations_arg args = {
		.dir_fh = NFS_FH(dir),
4267
		.name = name,
4268 4269 4270
		.page = page,
		.bitmask = bitmask,
	};
B
Benny Halevy 已提交
4271 4272 4273
	struct nfs4_fs_locations_res res = {
		.fs_locations = fs_locations,
	};
4274 4275 4276
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
		.rpc_argp = &args,
B
Benny Halevy 已提交
4277
		.rpc_resp = &res,
4278 4279 4280
	};
	int status;

4281
	dprintk("%s: start\n", __func__);
4282
	nfs_fattr_init(&fs_locations->fattr);
4283
	fs_locations->server = server;
4284
	fs_locations->nlocations = 0;
A
Andy Adamson 已提交
4285
	status = nfs4_call_sync(server, &msg, &args, &res, 0);
4286
	nfs_fixup_referral_attributes(&fs_locations->fattr);
4287
	dprintk("%s: returned status = %d\n", __func__, status);
4288 4289 4290
	return status;
}

4291
#ifdef CONFIG_NFS_V4_1
B
Benny Halevy 已提交
4292 4293 4294 4295 4296 4297 4298 4299
/*
 * nfs4_proc_exchange_id()
 *
 * Since the clientid has expired, all compounds using sessions
 * associated with the stale clientid will be returning
 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
 * be in some phase of session reset.
 */
4300
int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
B
Benny Halevy 已提交
4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320
{
	nfs4_verifier verifier;
	struct nfs41_exchange_id_args args = {
		.client = clp,
		.flags = clp->cl_exchange_flags,
	};
	struct nfs41_exchange_id_res res = {
		.client = clp,
	};
	int status;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
		.rpc_argp = &args,
		.rpc_resp = &res,
		.rpc_cred = cred,
	};
	__be32 *p;

	dprintk("--> %s\n", __func__);
	BUG_ON(clp == NULL);
4321

4322 4323 4324
	/* Remove server-only flags */
	args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;

B
Benny Halevy 已提交
4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353
	p = (u32 *)verifier.data;
	*p++ = htonl((u32)clp->cl_boot_time.tv_sec);
	*p = htonl((u32)clp->cl_boot_time.tv_nsec);
	args.verifier = &verifier;

	while (1) {
		args.id_len = scnprintf(args.id, sizeof(args.id),
					"%s/%s %u",
					clp->cl_ipaddr,
					rpc_peeraddr2str(clp->cl_rpcclient,
							 RPC_DISPLAY_ADDR),
					clp->cl_id_uniquifier);

		status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);

		if (status != NFS4ERR_CLID_INUSE)
			break;

		if (signalled())
			break;

		if (++clp->cl_id_uniquifier == 0)
			break;
	}

	dprintk("<-- %s status= %d\n", __func__, status);
	return status;
}

A
Andy Adamson 已提交
4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395
struct nfs4_get_lease_time_data {
	struct nfs4_get_lease_time_args *args;
	struct nfs4_get_lease_time_res *res;
	struct nfs_client *clp;
};

static void nfs4_get_lease_time_prepare(struct rpc_task *task,
					void *calldata)
{
	int ret;
	struct nfs4_get_lease_time_data *data =
			(struct nfs4_get_lease_time_data *)calldata;

	dprintk("--> %s\n", __func__);
	/* just setup sequence, do not trigger session recovery
	   since we're invoked within one */
	ret = nfs41_setup_sequence(data->clp->cl_session,
					&data->args->la_seq_args,
					&data->res->lr_seq_res, 0, task);

	BUG_ON(ret == -EAGAIN);
	rpc_call_start(task);
	dprintk("<-- %s\n", __func__);
}

/*
 * Called from nfs4_state_manager thread for session setup, so don't recover
 * from sequence operation or clientid errors.
 */
static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
{
	struct nfs4_get_lease_time_data *data =
			(struct nfs4_get_lease_time_data *)calldata;

	dprintk("--> %s\n", __func__);
	nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
	switch (task->tk_status) {
	case -NFS4ERR_DELAY:
	case -NFS4ERR_GRACE:
		dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
		rpc_delay(task, NFS4_POLL_RETRY_MIN);
		task->tk_status = 0;
4396
		nfs4_restart_rpc(task, data->clp);
A
Andy Adamson 已提交
4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446
		return;
	}
	dprintk("<-- %s\n", __func__);
}

struct rpc_call_ops nfs4_get_lease_time_ops = {
	.rpc_call_prepare = nfs4_get_lease_time_prepare,
	.rpc_call_done = nfs4_get_lease_time_done,
};

int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
{
	struct rpc_task *task;
	struct nfs4_get_lease_time_args args;
	struct nfs4_get_lease_time_res res = {
		.lr_fsinfo = fsinfo,
	};
	struct nfs4_get_lease_time_data data = {
		.args = &args,
		.res = &res,
		.clp = clp,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = clp->cl_rpcclient,
		.rpc_message = &msg,
		.callback_ops = &nfs4_get_lease_time_ops,
		.callback_data = &data
	};
	int status;

	res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
	dprintk("--> %s\n", __func__);
	task = rpc_run_task(&task_setup);

	if (IS_ERR(task))
		status = PTR_ERR(task);
	else {
		status = task->tk_status;
		rpc_put_task(task);
	}
	dprintk("<-- %s return %d\n", __func__, status);

	return status;
}

4447 4448 4449 4450 4451
/*
 * Reset a slot table
 */
static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
		int old_max_slots, int ivalue)
4452
{
4453
	int i;
4454 4455
	int ret = 0;

4456
	dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4457

4458 4459 4460 4461
	/*
	 * Until we have dynamic slot table adjustment, insist
	 * upon the same slot table size
	 */
4462 4463 4464 4465 4466 4467 4468 4469
	if (max_slots != old_max_slots) {
		dprintk("%s reset slot table does't match old\n",
			__func__);
		ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
		goto out;
	}
	spin_lock(&tbl->slot_tbl_lock);
	for (i = 0; i < max_slots; ++i)
4470
		tbl->slots[i].seq_nr = ivalue;
4471 4472 4473 4474 4475 4476 4477 4478
	spin_unlock(&tbl->slot_tbl_lock);
	dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
		tbl, tbl->slots, tbl->max_slots);
out:
	dprintk("<-- %s: return %d\n", __func__, ret);
	return ret;
}

4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489
/*
 * Reset the forechannel and backchannel slot tables
 */
static int nfs4_reset_slot_tables(struct nfs4_session *session)
{
	int status;

	status = nfs4_reset_slot_table(&session->fc_slot_table,
			session->fc_attrs.max_reqs,
			session->fc_slot_table.max_slots,
			1);
4490 4491 4492 4493 4494 4495 4496
	if (status)
		return status;

	status = nfs4_reset_slot_table(&session->bc_slot_table,
			session->bc_attrs.max_reqs,
			session->bc_slot_table.max_slots,
			0);
4497 4498 4499
	return status;
}

4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513
/* Destroy the slot table */
static void nfs4_destroy_slot_tables(struct nfs4_session *session)
{
	if (session->fc_slot_table.slots != NULL) {
		kfree(session->fc_slot_table.slots);
		session->fc_slot_table.slots = NULL;
	}
	if (session->bc_slot_table.slots != NULL) {
		kfree(session->bc_slot_table.slots);
		session->bc_slot_table.slots = NULL;
	}
	return;
}

A
Andy Adamson 已提交
4514 4515 4516
/*
 * Initialize slot table
 */
4517 4518
static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
		int max_slots, int ivalue)
A
Andy Adamson 已提交
4519 4520 4521 4522 4523 4524
{
	struct nfs4_slot *slot;
	int ret = -ENOMEM;

	BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);

4525
	dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
A
Andy Adamson 已提交
4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543

	slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
	if (!slot)
		goto out;
	ret = 0;

	spin_lock(&tbl->slot_tbl_lock);
	tbl->max_slots = max_slots;
	tbl->slots = slot;
	tbl->highest_used_slotid = -1;  /* no slot is currently used */
	spin_unlock(&tbl->slot_tbl_lock);
	dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
		tbl, tbl->slots, tbl->max_slots);
out:
	dprintk("<-- %s: return %d\n", __func__, ret);
	return ret;
}

4544 4545 4546 4547 4548
/*
 * Initialize the forechannel and backchannel tables
 */
static int nfs4_init_slot_tables(struct nfs4_session *session)
{
4549 4550
	struct nfs4_slot_table *tbl;
	int status = 0;
4551

4552 4553 4554 4555 4556 4557 4558
	tbl = &session->fc_slot_table;
	if (tbl->slots == NULL) {
		status = nfs4_init_slot_table(tbl,
				session->fc_attrs.max_reqs, 1);
		if (status)
			return status;
	}
4559

4560 4561 4562 4563 4564 4565 4566
	tbl = &session->bc_slot_table;
	if (tbl->slots == NULL) {
		status = nfs4_init_slot_table(tbl,
				session->bc_attrs.max_reqs, 0);
		if (status)
			nfs4_destroy_slot_tables(session);
	}
4567 4568

	return status;
4569 4570 4571 4572 4573 4574 4575 4576 4577 4578
}

struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
{
	struct nfs4_session *session;
	struct nfs4_slot_table *tbl;

	session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
	if (!session)
		return NULL;
4579 4580 4581 4582 4583 4584 4585 4586

	/*
	 * The create session reply races with the server back
	 * channel probe. Mark the client NFS_CS_SESSION_INITING
	 * so that the client back channel can find the
	 * nfs_client struct
	 */
	clp->cl_cons_state = NFS_CS_SESSION_INITING;
4587
	init_completion(&session->complete);
4588

4589 4590
	tbl = &session->fc_slot_table;
	spin_lock_init(&tbl->slot_tbl_lock);
4591 4592 4593 4594 4595 4596
	rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");

	tbl = &session->bc_slot_table;
	spin_lock_init(&tbl->slot_tbl_lock);
	rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");

4597 4598 4599 4600 4601 4602
	session->clp = clp;
	return session;
}

void nfs4_destroy_session(struct nfs4_session *session)
{
4603 4604 4605 4606 4607
	nfs4_proc_destroy_session(session);
	dprintk("%s Destroy backchannel for xprt %p\n",
		__func__, session->clp->cl_rpcclient->cl_xprt);
	xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
				NFS41_BC_MIN_CALLBACKS);
4608
	nfs4_destroy_slot_tables(session);
4609 4610 4611
	kfree(session);
}

A
Andy Adamson 已提交
4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661
/*
 * Initialize the values to be used by the client in CREATE_SESSION
 * If nfs4_init_session set the fore channel request and response sizes,
 * use them.
 *
 * Set the back channel max_resp_sz_cached to zero to force the client to
 * always set csa_cachethis to FALSE because the current implementation
 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
 */
static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
{
	struct nfs4_session *session = args->client->cl_session;
	unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
		     mxresp_sz = session->fc_attrs.max_resp_sz;

	if (mxrqst_sz == 0)
		mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
	if (mxresp_sz == 0)
		mxresp_sz = NFS_MAX_FILE_IO_SIZE;
	/* Fore channel attributes */
	args->fc_attrs.headerpadsz = 0;
	args->fc_attrs.max_rqst_sz = mxrqst_sz;
	args->fc_attrs.max_resp_sz = mxresp_sz;
	args->fc_attrs.max_resp_sz_cached = mxresp_sz;
	args->fc_attrs.max_ops = NFS4_MAX_OPS;
	args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;

	dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
		"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
		__func__,
		args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
		args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
		args->fc_attrs.max_reqs);

	/* Back channel attributes */
	args->bc_attrs.headerpadsz = 0;
	args->bc_attrs.max_rqst_sz = PAGE_SIZE;
	args->bc_attrs.max_resp_sz = PAGE_SIZE;
	args->bc_attrs.max_resp_sz_cached = 0;
	args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
	args->bc_attrs.max_reqs = 1;

	dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
		"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
		__func__,
		args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
		args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
		args->bc_attrs.max_reqs);
}

4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706
static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
{
	if (rcvd <= sent)
		return 0;
	printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
		"sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
	return -EINVAL;
}

#define _verify_fore_channel_attr(_name_) \
	_verify_channel_attr("fore", #_name_, \
			     args->fc_attrs._name_, \
			     session->fc_attrs._name_)

#define _verify_back_channel_attr(_name_) \
	_verify_channel_attr("back", #_name_, \
			     args->bc_attrs._name_, \
			     session->bc_attrs._name_)

/*
 * The server is not allowed to increase the fore channel header pad size,
 * maximum response size, or maximum number of operations.
 *
 * The back channel attributes are only negotiatied down: We send what the
 * (back channel) server insists upon.
 */
static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
				     struct nfs4_session *session)
{
	int ret = 0;

	ret |= _verify_fore_channel_attr(headerpadsz);
	ret |= _verify_fore_channel_attr(max_resp_sz);
	ret |= _verify_fore_channel_attr(max_ops);

	ret |= _verify_back_channel_attr(headerpadsz);
	ret |= _verify_back_channel_attr(max_rqst_sz);
	ret |= _verify_back_channel_attr(max_resp_sz);
	ret |= _verify_back_channel_attr(max_resp_sz_cached);
	ret |= _verify_back_channel_attr(max_ops);
	ret |= _verify_back_channel_attr(max_reqs);

	return ret;
}

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Andy Adamson 已提交
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static int _nfs4_proc_create_session(struct nfs_client *clp)
{
	struct nfs4_session *session = clp->cl_session;
	struct nfs41_create_session_args args = {
		.client = clp,
		.cb_program = NFS4_CALLBACK,
	};
	struct nfs41_create_session_res res = {
		.client = clp,
	};
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	int status;

	nfs4_init_channel_attrs(&args);
4725
	args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
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Andy Adamson 已提交
4726 4727 4728

	status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);

4729 4730 4731
	if (!status)
		/* Verify the session's negotiated channel_attrs values */
		status = nfs4_verify_channel_attrs(&args, session);
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Andy Adamson 已提交
4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744
	if (!status) {
		/* Increment the clientid slot sequence id */
		clp->cl_seqid++;
	}

	return status;
}

/*
 * Issues a CREATE_SESSION operation to the server.
 * It is the responsibility of the caller to verify the session is
 * expired before calling this routine.
 */
4745
int nfs4_proc_create_session(struct nfs_client *clp)
A
Andy Adamson 已提交
4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757
{
	int status;
	unsigned *ptr;
	struct nfs_fsinfo fsinfo;
	struct nfs4_session *session = clp->cl_session;

	dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);

	status = _nfs4_proc_create_session(clp);
	if (status)
		goto out;

4758 4759 4760 4761 4762 4763 4764
	/* Init and reset the fore channel */
	status = nfs4_init_slot_tables(session);
	dprintk("slot table initialization returned %d\n", status);
	if (status)
		goto out;
	status = nfs4_reset_slot_tables(session);
	dprintk("slot table reset returned %d\n", status);
A
Andy Adamson 已提交
4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787
	if (status)
		goto out;

	ptr = (unsigned *)&session->sess_id.data[0];
	dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
		clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);

	/* Get the lease time */
	status = nfs4_proc_get_lease_time(clp, &fsinfo);
	if (status == 0) {
		/* Update lease time and schedule renewal */
		spin_lock(&clp->cl_lock);
		clp->cl_lease_time = fsinfo.lease_time * HZ;
		clp->cl_last_renewal = jiffies;
		spin_unlock(&clp->cl_lock);

		nfs4_schedule_state_renewal(clp);
	}
out:
	dprintk("<-- %s\n", __func__);
	return status;
}

A
Andy Adamson 已提交
4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817
/*
 * Issue the over-the-wire RPC DESTROY_SESSION.
 * The caller must serialize access to this routine.
 */
int nfs4_proc_destroy_session(struct nfs4_session *session)
{
	int status = 0;
	struct rpc_message msg;

	dprintk("--> nfs4_proc_destroy_session\n");

	/* session is still being setup */
	if (session->clp->cl_cons_state != NFS_CS_READY)
		return status;

	msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
	msg.rpc_argp = session;
	msg.rpc_resp = NULL;
	msg.rpc_cred = NULL;
	status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);

	if (status)
		printk(KERN_WARNING
			"Got error %d from the server on DESTROY_SESSION. "
			"Session has been destroyed regardless...\n", status);

	dprintk("<-- nfs4_proc_destroy_session\n");
	return status;
}

4818 4819 4820
int nfs4_init_session(struct nfs_server *server)
{
	struct nfs_client *clp = server->nfs_client;
4821
	struct nfs4_session *session;
4822 4823 4824 4825 4826
	int ret;

	if (!nfs4_has_session(clp))
		return 0;

4827 4828 4829 4830
	session = clp->cl_session;
	session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
	session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;

4831 4832 4833 4834 4835 4836
	ret = nfs4_recover_expired_lease(server);
	if (!ret)
		ret = nfs4_check_client_ready(clp);
	return ret;
}

A
Andy Adamson 已提交
4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868
/*
 * Renew the cl_session lease.
 */
static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
{
	struct nfs4_sequence_args args;
	struct nfs4_sequence_res res;

	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
		.rpc_argp = &args,
		.rpc_resp = &res,
		.rpc_cred = cred,
	};

	args.sa_cache_this = 0;

	return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
				       &res, 0);
}

void nfs41_sequence_call_done(struct rpc_task *task, void *data)
{
	struct nfs_client *clp = (struct nfs_client *)data;

	nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);

	if (task->tk_status < 0) {
		dprintk("%s ERROR %d\n", __func__, task->tk_status);

		if (_nfs4_async_handle_error(task, NULL, clp, NULL)
								== -EAGAIN) {
4869
			nfs4_restart_rpc(task, clp);
A
Andy Adamson 已提交
4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926
			return;
		}
	}
	dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);

	kfree(task->tk_msg.rpc_argp);
	kfree(task->tk_msg.rpc_resp);

	dprintk("<-- %s\n", __func__);
}

static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
{
	struct nfs_client *clp;
	struct nfs4_sequence_args *args;
	struct nfs4_sequence_res *res;

	clp = (struct nfs_client *)data;
	args = task->tk_msg.rpc_argp;
	res = task->tk_msg.rpc_resp;

	if (nfs4_setup_sequence(clp, args, res, 0, task))
		return;
	rpc_call_start(task);
}

static const struct rpc_call_ops nfs41_sequence_ops = {
	.rpc_call_done = nfs41_sequence_call_done,
	.rpc_call_prepare = nfs41_sequence_prepare,
};

static int nfs41_proc_async_sequence(struct nfs_client *clp,
				     struct rpc_cred *cred)
{
	struct nfs4_sequence_args *args;
	struct nfs4_sequence_res *res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
		.rpc_cred = cred,
	};

	args = kzalloc(sizeof(*args), GFP_KERNEL);
	if (!args)
		return -ENOMEM;
	res = kzalloc(sizeof(*res), GFP_KERNEL);
	if (!res) {
		kfree(args);
		return -ENOMEM;
	}
	res->sr_slotid = NFS4_MAX_SLOT_TABLE;
	msg.rpc_argp = args;
	msg.rpc_resp = res;

	return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
			      &nfs41_sequence_ops, (void *)clp);
}

4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029
struct nfs4_reclaim_complete_data {
	struct nfs_client *clp;
	struct nfs41_reclaim_complete_args arg;
	struct nfs41_reclaim_complete_res res;
};

static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
{
	struct nfs4_reclaim_complete_data *calldata = data;

	if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
				&calldata->res.seq_res, 0, task))
		return;

	rpc_call_start(task);
}

static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
{
	struct nfs4_reclaim_complete_data *calldata = data;
	struct nfs_client *clp = calldata->clp;
	struct nfs4_sequence_res *res = &calldata->res.seq_res;

	dprintk("--> %s\n", __func__);
	nfs41_sequence_done(clp, res, task->tk_status);
	switch (task->tk_status) {
	case 0:
	case -NFS4ERR_COMPLETE_ALREADY:
		break;
	case -NFS4ERR_BADSESSION:
	case -NFS4ERR_DEADSESSION:
		/*
		 * Handle the session error, but do not retry the operation, as
		 * we have no way of telling whether the clientid had to be
		 * reset before we got our reply.  If reset, a new wave of
		 * reclaim operations will follow, containing their own reclaim
		 * complete.  We don't want our retry to get on the way of
		 * recovery by incorrectly indicating to the server that we're
		 * done reclaiming state since the process had to be restarted.
		 */
		_nfs4_async_handle_error(task, NULL, clp, NULL);
		break;
	default:
		if (_nfs4_async_handle_error(
				task, NULL, clp, NULL) == -EAGAIN) {
			rpc_restart_call_prepare(task);
			return;
		}
	}

	dprintk("<-- %s\n", __func__);
}

static void nfs4_free_reclaim_complete_data(void *data)
{
	struct nfs4_reclaim_complete_data *calldata = data;

	kfree(calldata);
}

static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
	.rpc_call_prepare = nfs4_reclaim_complete_prepare,
	.rpc_call_done = nfs4_reclaim_complete_done,
	.rpc_release = nfs4_free_reclaim_complete_data,
};

/*
 * Issue a global reclaim complete.
 */
static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
{
	struct nfs4_reclaim_complete_data *calldata;
	struct rpc_task *task;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
	};
	struct rpc_task_setup task_setup_data = {
		.rpc_client = clp->cl_rpcclient,
		.rpc_message = &msg,
		.callback_ops = &nfs4_reclaim_complete_call_ops,
		.flags = RPC_TASK_ASYNC,
	};
	int status = -ENOMEM;

	dprintk("--> %s\n", __func__);
	calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
	if (calldata == NULL)
		goto out;
	calldata->clp = clp;
	calldata->arg.one_fs = 0;
	calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;

	msg.rpc_argp = &calldata->arg;
	msg.rpc_resp = &calldata->res;
	task_setup_data.callback_data = calldata;
	task = rpc_run_task(&task_setup_data);
	if (IS_ERR(task))
		status = PTR_ERR(task);
	rpc_put_task(task);
out:
	dprintk("<-- %s status=%d\n", __func__, status);
	return status;
}
5030 5031
#endif /* CONFIG_NFS_V4_1 */

5032
struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5033
	.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5034
	.state_flag_bit	= NFS_STATE_RECLAIM_REBOOT,
L
Linus Torvalds 已提交
5035 5036
	.recover_open	= nfs4_open_reclaim,
	.recover_lock	= nfs4_lock_reclaim,
5037
	.establish_clid = nfs4_init_clientid,
5038
	.get_clid_cred	= nfs4_get_setclientid_cred,
L
Linus Torvalds 已提交
5039 5040
};

5041 5042 5043 5044 5045 5046
#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
	.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
	.state_flag_bit	= NFS_STATE_RECLAIM_REBOOT,
	.recover_open	= nfs4_open_reclaim,
	.recover_lock	= nfs4_lock_reclaim,
5047
	.establish_clid = nfs41_init_clientid,
5048
	.get_clid_cred	= nfs4_get_exchange_id_cred,
5049
	.reclaim_complete = nfs41_proc_reclaim_complete,
5050 5051 5052 5053 5054 5055 5056 5057 5058
};
#endif /* CONFIG_NFS_V4_1 */

struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
	.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
	.state_flag_bit	= NFS_STATE_RECLAIM_NOGRACE,
	.recover_open	= nfs4_open_expired,
	.recover_lock	= nfs4_lock_expired,
	.establish_clid = nfs4_init_clientid,
5059
	.get_clid_cred	= nfs4_get_setclientid_cred,
5060 5061 5062 5063
};

#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5064
	.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5065
	.state_flag_bit	= NFS_STATE_RECLAIM_NOGRACE,
L
Linus Torvalds 已提交
5066 5067
	.recover_open	= nfs4_open_expired,
	.recover_lock	= nfs4_lock_expired,
5068
	.establish_clid = nfs41_init_clientid,
5069
	.get_clid_cred	= nfs4_get_exchange_id_cred,
L
Linus Torvalds 已提交
5070
};
5071
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
5072

B
Benny Halevy 已提交
5073 5074
struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
	.sched_state_renewal = nfs4_proc_async_renew,
5075
	.get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5076
	.renew_lease = nfs4_proc_renew,
B
Benny Halevy 已提交
5077 5078 5079 5080 5081
};

#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
	.sched_state_renewal = nfs41_proc_async_sequence,
5082
	.get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5083
	.renew_lease = nfs4_proc_sequence,
B
Benny Halevy 已提交
5084 5085 5086 5087 5088 5089 5090
};
#endif

/*
 * Per minor version reboot and network partition recovery ops
 */

5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104
struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
	&nfs40_reboot_recovery_ops,
#if defined(CONFIG_NFS_V4_1)
	&nfs41_reboot_recovery_ops,
#endif
};

struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
	&nfs40_nograce_recovery_ops,
#if defined(CONFIG_NFS_V4_1)
	&nfs41_nograce_recovery_ops,
#endif
};

B
Benny Halevy 已提交
5105 5106 5107 5108 5109 5110 5111
struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
	&nfs40_state_renewal_ops,
#if defined(CONFIG_NFS_V4_1)
	&nfs41_state_renewal_ops,
#endif
};

5112
static const struct inode_operations nfs4_file_inode_operations = {
5113 5114 5115 5116 5117 5118 5119 5120
	.permission	= nfs_permission,
	.getattr	= nfs_getattr,
	.setattr	= nfs_setattr,
	.getxattr	= nfs4_getxattr,
	.setxattr	= nfs4_setxattr,
	.listxattr	= nfs4_listxattr,
};

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const struct nfs_rpc_ops nfs_v4_clientops = {
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	.version	= 4,			/* protocol version */
	.dentry_ops	= &nfs4_dentry_operations,
	.dir_inode_ops	= &nfs4_dir_inode_operations,
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	.file_inode_ops	= &nfs4_file_inode_operations,
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	.getroot	= nfs4_proc_get_root,
	.getattr	= nfs4_proc_getattr,
	.setattr	= nfs4_proc_setattr,
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	.lookupfh	= nfs4_proc_lookupfh,
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	.lookup		= nfs4_proc_lookup,
	.access		= nfs4_proc_access,
	.readlink	= nfs4_proc_readlink,
	.create		= nfs4_proc_create,
	.remove		= nfs4_proc_remove,
	.unlink_setup	= nfs4_proc_unlink_setup,
	.unlink_done	= nfs4_proc_unlink_done,
	.rename		= nfs4_proc_rename,
	.link		= nfs4_proc_link,
	.symlink	= nfs4_proc_symlink,
	.mkdir		= nfs4_proc_mkdir,
	.rmdir		= nfs4_proc_remove,
	.readdir	= nfs4_proc_readdir,
	.mknod		= nfs4_proc_mknod,
	.statfs		= nfs4_proc_statfs,
	.fsinfo		= nfs4_proc_fsinfo,
	.pathconf	= nfs4_proc_pathconf,
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	.set_capabilities = nfs4_server_capabilities,
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	.decode_dirent	= nfs4_decode_dirent,
	.read_setup	= nfs4_proc_read_setup,
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	.read_done	= nfs4_read_done,
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	.write_setup	= nfs4_proc_write_setup,
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	.write_done	= nfs4_write_done,
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	.commit_setup	= nfs4_proc_commit_setup,
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	.commit_done	= nfs4_commit_done,
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	.lock		= nfs4_proc_lock,
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	.clear_acl_cache = nfs4_zap_acl_attr,
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	.close_context  = nfs4_close_context,
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};

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */