b3b94faa5f
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
402 lines
8.7 KiB
C
402 lines
8.7 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2005 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 v.2.
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/statfs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/kthread.h>
|
|
#include <linux/delay.h>
|
|
#include <asm/semaphore.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "glock.h"
|
|
#include "inode.h"
|
|
#include "lm.h"
|
|
#include "log.h"
|
|
#include "mount.h"
|
|
#include "ops_super.h"
|
|
#include "page.h"
|
|
#include "quota.h"
|
|
#include "recovery.h"
|
|
#include "rgrp.h"
|
|
#include "super.h"
|
|
#include "sys.h"
|
|
|
|
/**
|
|
* gfs2_write_inode - Make sure the inode is stable on the disk
|
|
* @inode: The inode
|
|
* @sync: synchronous write flag
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_write_inode(struct inode *inode, int sync)
|
|
{
|
|
struct gfs2_inode *ip = get_v2ip(inode);
|
|
|
|
atomic_inc(&ip->i_sbd->sd_ops_super);
|
|
|
|
if (current->flags & PF_MEMALLOC)
|
|
return 0;
|
|
if (ip && sync)
|
|
gfs2_log_flush_glock(ip->i_gl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_put_super - Unmount the filesystem
|
|
* @sb: The VFS superblock
|
|
*
|
|
*/
|
|
|
|
static void gfs2_put_super(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
int error;
|
|
|
|
if (!sdp)
|
|
return;
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
|
|
/* Unfreeze the filesystem, if we need to */
|
|
|
|
down(&sdp->sd_freeze_lock);
|
|
if (sdp->sd_freeze_count)
|
|
gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
|
|
up(&sdp->sd_freeze_lock);
|
|
|
|
kthread_stop(sdp->sd_inoded_process);
|
|
kthread_stop(sdp->sd_quotad_process);
|
|
kthread_stop(sdp->sd_logd_process);
|
|
kthread_stop(sdp->sd_recoverd_process);
|
|
while (sdp->sd_glockd_num--)
|
|
kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
|
|
kthread_stop(sdp->sd_scand_process);
|
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
|
error = gfs2_make_fs_ro(sdp);
|
|
if (error)
|
|
gfs2_io_error(sdp);
|
|
}
|
|
|
|
/* At this point, we're through modifying the disk */
|
|
|
|
/* Release stuff */
|
|
|
|
gfs2_inode_put(sdp->sd_master_dir);
|
|
gfs2_inode_put(sdp->sd_jindex);
|
|
gfs2_inode_put(sdp->sd_inum_inode);
|
|
gfs2_inode_put(sdp->sd_statfs_inode);
|
|
gfs2_inode_put(sdp->sd_rindex);
|
|
gfs2_inode_put(sdp->sd_quota_inode);
|
|
gfs2_inode_put(sdp->sd_root_dir);
|
|
|
|
gfs2_glock_put(sdp->sd_rename_gl);
|
|
gfs2_glock_put(sdp->sd_trans_gl);
|
|
|
|
if (!sdp->sd_args.ar_spectator) {
|
|
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
|
|
gfs2_inode_put(sdp->sd_ir_inode);
|
|
gfs2_inode_put(sdp->sd_sc_inode);
|
|
gfs2_inode_put(sdp->sd_ut_inode);
|
|
gfs2_inode_put(sdp->sd_qc_inode);
|
|
}
|
|
|
|
gfs2_glock_dq_uninit(&sdp->sd_live_gh);
|
|
|
|
gfs2_clear_rgrpd(sdp);
|
|
gfs2_jindex_free(sdp);
|
|
|
|
/* Take apart glock structures and buffer lists */
|
|
gfs2_gl_hash_clear(sdp, WAIT);
|
|
|
|
/* Unmount the locking protocol */
|
|
gfs2_lm_unmount(sdp);
|
|
|
|
/* At this point, we're through participating in the lockspace */
|
|
|
|
gfs2_sys_fs_del(sdp);
|
|
|
|
/* Get rid of any extra inodes */
|
|
while (invalidate_inodes(sb))
|
|
yield();
|
|
|
|
vfree(sdp);
|
|
|
|
set_v2sdp(sb, NULL);
|
|
}
|
|
|
|
/**
|
|
* gfs2_write_super - disk commit all incore transactions
|
|
* @sb: the filesystem
|
|
*
|
|
* This function is called every time sync(2) is called.
|
|
* After this exits, all dirty buffers and synced.
|
|
*/
|
|
|
|
static void gfs2_write_super(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
gfs2_log_flush(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_write_super_lockfs - prevent further writes to the filesystem
|
|
* @sb: the VFS structure for the filesystem
|
|
*
|
|
*/
|
|
|
|
static void gfs2_write_super_lockfs(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
int error;
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
|
|
for (;;) {
|
|
error = gfs2_freeze_fs(sdp);
|
|
if (!error)
|
|
break;
|
|
|
|
switch (error) {
|
|
case -EBUSY:
|
|
fs_err(sdp, "waiting for recovery before freeze\n");
|
|
break;
|
|
|
|
default:
|
|
fs_err(sdp, "error freezing FS: %d\n", error);
|
|
break;
|
|
}
|
|
|
|
fs_err(sdp, "retrying...\n");
|
|
msleep(1000);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gfs2_unlockfs - reallow writes to the filesystem
|
|
* @sb: the VFS structure for the filesystem
|
|
*
|
|
*/
|
|
|
|
static void gfs2_unlockfs(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
gfs2_unfreeze_fs(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_statfs - Gather and return stats about the filesystem
|
|
* @sb: The superblock
|
|
* @statfsbuf: The buffer
|
|
*
|
|
* Returns: 0 on success or error code
|
|
*/
|
|
|
|
static int gfs2_statfs(struct super_block *sb, struct kstatfs *buf)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
struct gfs2_statfs_change sc;
|
|
int error;
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
|
|
if (gfs2_tune_get(sdp, gt_statfs_slow))
|
|
error = gfs2_statfs_slow(sdp, &sc);
|
|
else
|
|
error = gfs2_statfs_i(sdp, &sc);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
memset(buf, 0, sizeof(struct kstatfs));
|
|
|
|
buf->f_type = GFS2_MAGIC;
|
|
buf->f_bsize = sdp->sd_sb.sb_bsize;
|
|
buf->f_blocks = sc.sc_total;
|
|
buf->f_bfree = sc.sc_free;
|
|
buf->f_bavail = sc.sc_free;
|
|
buf->f_files = sc.sc_dinodes + sc.sc_free;
|
|
buf->f_ffree = sc.sc_free;
|
|
buf->f_namelen = GFS2_FNAMESIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_remount_fs - called when the FS is remounted
|
|
* @sb: the filesystem
|
|
* @flags: the remount flags
|
|
* @data: extra data passed in (not used right now)
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(sb);
|
|
int error;
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
|
|
error = gfs2_mount_args(sdp, data, 1);
|
|
if (error)
|
|
return error;
|
|
|
|
if (sdp->sd_args.ar_spectator)
|
|
*flags |= MS_RDONLY;
|
|
else {
|
|
if (*flags & MS_RDONLY) {
|
|
if (!(sb->s_flags & MS_RDONLY))
|
|
error = gfs2_make_fs_ro(sdp);
|
|
} else if (!(*flags & MS_RDONLY) &&
|
|
(sb->s_flags & MS_RDONLY)) {
|
|
error = gfs2_make_fs_rw(sdp);
|
|
}
|
|
}
|
|
|
|
if (*flags & (MS_NOATIME | MS_NODIRATIME))
|
|
set_bit(SDF_NOATIME, &sdp->sd_flags);
|
|
else
|
|
clear_bit(SDF_NOATIME, &sdp->sd_flags);
|
|
|
|
/* Don't let the VFS update atimes. GFS2 handles this itself. */
|
|
*flags |= MS_NOATIME | MS_NODIRATIME;
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_clear_inode - Deallocate an inode when VFS is done with it
|
|
* @inode: The VFS inode
|
|
*
|
|
*/
|
|
|
|
static void gfs2_clear_inode(struct inode *inode)
|
|
{
|
|
struct gfs2_inode *ip = get_v2ip(inode);
|
|
|
|
atomic_inc(&get_v2sdp(inode->i_sb)->sd_ops_super);
|
|
|
|
if (ip) {
|
|
spin_lock(&ip->i_spin);
|
|
ip->i_vnode = NULL;
|
|
set_v2ip(inode, NULL);
|
|
spin_unlock(&ip->i_spin);
|
|
|
|
gfs2_glock_schedule_for_reclaim(ip->i_gl);
|
|
gfs2_inode_put(ip);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gfs2_show_options - Show mount options for /proc/mounts
|
|
* @s: seq_file structure
|
|
* @mnt: vfsmount
|
|
*
|
|
* Returns: 0 on success or error code
|
|
*/
|
|
|
|
static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
|
|
{
|
|
struct gfs2_sbd *sdp = get_v2sdp(mnt->mnt_sb);
|
|
struct gfs2_args *args = &sdp->sd_args;
|
|
|
|
atomic_inc(&sdp->sd_ops_super);
|
|
|
|
if (args->ar_lockproto[0])
|
|
seq_printf(s, ",lockproto=%s", args->ar_lockproto);
|
|
if (args->ar_locktable[0])
|
|
seq_printf(s, ",locktable=%s", args->ar_locktable);
|
|
if (args->ar_hostdata[0])
|
|
seq_printf(s, ",hostdata=%s", args->ar_hostdata);
|
|
if (args->ar_spectator)
|
|
seq_printf(s, ",spectator");
|
|
if (args->ar_ignore_local_fs)
|
|
seq_printf(s, ",ignore_local_fs");
|
|
if (args->ar_localflocks)
|
|
seq_printf(s, ",localflocks");
|
|
if (args->ar_localcaching)
|
|
seq_printf(s, ",localcaching");
|
|
if (args->ar_debug)
|
|
seq_printf(s, ",debug");
|
|
if (args->ar_upgrade)
|
|
seq_printf(s, ",upgrade");
|
|
if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT)
|
|
seq_printf(s, ",num_glockd=%u", args->ar_num_glockd);
|
|
if (args->ar_posix_acl)
|
|
seq_printf(s, ",acl");
|
|
if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
|
|
char *state;
|
|
switch (args->ar_quota) {
|
|
case GFS2_QUOTA_OFF:
|
|
state = "off";
|
|
break;
|
|
case GFS2_QUOTA_ACCOUNT:
|
|
state = "account";
|
|
break;
|
|
case GFS2_QUOTA_ON:
|
|
state = "on";
|
|
break;
|
|
default:
|
|
state = "unknown";
|
|
break;
|
|
}
|
|
seq_printf(s, ",quota=%s", state);
|
|
}
|
|
if (args->ar_suiddir)
|
|
seq_printf(s, ",suiddir");
|
|
if (args->ar_data != GFS2_DATA_DEFAULT) {
|
|
char *state;
|
|
switch (args->ar_data) {
|
|
case GFS2_DATA_WRITEBACK:
|
|
state = "writeback";
|
|
break;
|
|
case GFS2_DATA_ORDERED:
|
|
state = "ordered";
|
|
break;
|
|
default:
|
|
state = "unknown";
|
|
break;
|
|
}
|
|
seq_printf(s, ",data=%s", state);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct super_operations gfs2_super_ops = {
|
|
.write_inode = gfs2_write_inode,
|
|
.put_super = gfs2_put_super,
|
|
.write_super = gfs2_write_super,
|
|
.write_super_lockfs = gfs2_write_super_lockfs,
|
|
.unlockfs = gfs2_unlockfs,
|
|
.statfs = gfs2_statfs,
|
|
.remount_fs = gfs2_remount_fs,
|
|
.clear_inode = gfs2_clear_inode,
|
|
.show_options = gfs2_show_options,
|
|
};
|
|
|