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/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/delay.h>
#include <linux/gfs2_ondisk.h>
#include "gfs2.h"
#include "lm_interface.h"
#include "incore.h"
#include "glock.h"
#include "lm.h"
#include "super.h"
#include "util.h"
/**
* gfs2_lm_mount - mount a locking protocol
* @sdp: the filesystem
* @args: mount arguements
* @silent: if 1, don't complain if the FS isn't a GFS2 fs
*
* Returns: errno
*/
int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
{
char *proto = sdp->sd_proto_name;
char *table = sdp->sd_table_name;
int flags = 0;
int error;
if (sdp->sd_args.ar_spectator)
flags |= LM_MFLAG_SPECTATOR;
fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata,
gfs2_glock_cb, sdp,
GFS2_MIN_LVB_SIZE, flags,
&sdp->sd_lockstruct, &sdp->sd_kobj);
if (error) {
fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
proto, table, sdp->sd_args.ar_hostdata);
goto out;
}
if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lockspace) ||
gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) ||
gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >=
GFS2_MIN_LVB_SIZE)) {
gfs2_unmount_lockproto(&sdp->sd_lockstruct);
goto out;
}
if (sdp->sd_args.ar_spectator)
snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
else
snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
sdp->sd_lockstruct.ls_jid);
fs_info(sdp, "Joined cluster. Now mounting FS...\n");
if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) &&
!sdp->sd_args.ar_ignore_local_fs) {
sdp->sd_args.ar_localflocks = 1;
sdp->sd_args.ar_localcaching = 1;
}
out:
return error;
}
void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_others_may_mount(
sdp->sd_lockstruct.ls_lockspace);
}
void gfs2_lm_unmount(struct gfs2_sbd *sdp)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
gfs2_unmount_lockproto(&sdp->sd_lockstruct);
}
int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
{
va_list args;
if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
return 0;
va_start(args, fmt);
vprintk(fmt, args);
va_end(args);
fs_err(sdp, "about to withdraw from the cluster\n");
BUG_ON(sdp->sd_args.ar_debug);
fs_err(sdp, "waiting for outstanding I/O\n");
/* FIXME: suspend dm device so oustanding bio's complete
and all further io requests fail */
fs_err(sdp, "telling LM to withdraw\n");
gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
fs_err(sdp, "withdrawn\n");
dump_stack();
return -1;
}
int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
lm_lock_t **lockp)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_get_lock(
sdp->sd_lockstruct.ls_lockspace, name, lockp);
return error;
}
void gfs2_lm_put_lock(struct gfs2_sbd *sdp, lm_lock_t *lock)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_put_lock(lock);
}
unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock,
unsigned int cur_state, unsigned int req_state,
unsigned int flags)
{
int ret = 0;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock, cur_state,
req_state, flags);
return ret;
}
unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock,
unsigned int cur_state)
{
int ret = 0;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
ret = sdp->sd_lockstruct.ls_ops->lm_unlock(lock, cur_state);
return ret;
}
void gfs2_lm_cancel(struct gfs2_sbd *sdp, lm_lock_t *lock)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_cancel(lock);
}
int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_hold_lvb(lock, lvbp);
return error;
}
void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(lock, lvb);
}
int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_plock_get(
sdp->sd_lockstruct.ls_lockspace, name, file, fl);
return error;
}
int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, int cmd, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_plock(
sdp->sd_lockstruct.ls_lockspace, name, file, cmd, fl);
return error;
}
int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_punlock(
sdp->sd_lockstruct.ls_lockspace, name, file, fl);
return error;
}
void gfs2_lm_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
unsigned int message)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_recovery_done(
sdp->sd_lockstruct.ls_lockspace, jid, message);
}
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