137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/*
|
|
* 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/kthread.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/lm_interface.h>
|
|
#include <linux/freezer.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "daemon.h"
|
|
#include "glock.h"
|
|
#include "log.h"
|
|
#include "quota.h"
|
|
#include "recovery.h"
|
|
#include "super.h"
|
|
#include "util.h"
|
|
|
|
/* This uses schedule_timeout() instead of msleep() because it's good for
|
|
the daemons to wake up more often than the timeout when unmounting so
|
|
the user's unmount doesn't sit there forever.
|
|
|
|
The kthread functions used to start these daemons block and flush signals. */
|
|
|
|
/**
|
|
* gfs2_glockd - Reclaim unused glock structures
|
|
* @sdp: Pointer to GFS2 superblock
|
|
*
|
|
* One or more of these daemons run, reclaiming glocks on sd_reclaim_list.
|
|
* Number of daemons can be set by user, with num_glockd mount option.
|
|
*/
|
|
|
|
int gfs2_glockd(void *data)
|
|
{
|
|
struct gfs2_sbd *sdp = data;
|
|
|
|
while (!kthread_should_stop()) {
|
|
while (atomic_read(&sdp->sd_reclaim_count))
|
|
gfs2_reclaim_glock(sdp);
|
|
|
|
wait_event_interruptible(sdp->sd_reclaim_wq,
|
|
(atomic_read(&sdp->sd_reclaim_count) ||
|
|
kthread_should_stop()));
|
|
if (freezing(current))
|
|
refrigerator();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_recoverd - Recover dead machine's journals
|
|
* @sdp: Pointer to GFS2 superblock
|
|
*
|
|
*/
|
|
|
|
int gfs2_recoverd(void *data)
|
|
{
|
|
struct gfs2_sbd *sdp = data;
|
|
unsigned long t;
|
|
|
|
while (!kthread_should_stop()) {
|
|
gfs2_check_journals(sdp);
|
|
t = gfs2_tune_get(sdp, gt_recoverd_secs) * HZ;
|
|
if (freezing(current))
|
|
refrigerator();
|
|
schedule_timeout_interruptible(t);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_quotad - Write cached quota changes into the quota file
|
|
* @sdp: Pointer to GFS2 superblock
|
|
*
|
|
*/
|
|
|
|
int gfs2_quotad(void *data)
|
|
{
|
|
struct gfs2_sbd *sdp = data;
|
|
unsigned long t;
|
|
int error;
|
|
|
|
while (!kthread_should_stop()) {
|
|
/* Update the master statfs file */
|
|
|
|
t = sdp->sd_statfs_sync_time +
|
|
gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
|
|
|
|
if (time_after_eq(jiffies, t)) {
|
|
error = gfs2_statfs_sync(sdp);
|
|
if (error &&
|
|
error != -EROFS &&
|
|
!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
|
|
fs_err(sdp, "quotad: (1) error=%d\n", error);
|
|
sdp->sd_statfs_sync_time = jiffies;
|
|
}
|
|
|
|
/* Update quota file */
|
|
|
|
t = sdp->sd_quota_sync_time +
|
|
gfs2_tune_get(sdp, gt_quota_quantum) * HZ;
|
|
|
|
if (time_after_eq(jiffies, t)) {
|
|
error = gfs2_quota_sync(sdp);
|
|
if (error &&
|
|
error != -EROFS &&
|
|
!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
|
|
fs_err(sdp, "quotad: (2) error=%d\n", error);
|
|
sdp->sd_quota_sync_time = jiffies;
|
|
}
|
|
|
|
gfs2_quota_scan(sdp);
|
|
|
|
t = gfs2_tune_get(sdp, gt_quotad_secs) * HZ;
|
|
if (freezing(current))
|
|
refrigerator();
|
|
schedule_timeout_interruptible(t);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|