path: root/fs/gfs2/ops_fstype.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/blkdev.h>
#include <linux/kthread.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>

#include "gfs2.h"
#include "incore.h"
#include "daemon.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "lm.h"
#include "mount.h"
#include "ops_fstype.h"
#include "ops_dentry.h"
#include "ops_super.h"
#include "recovery.h"
#include "rgrp.h"
#include "super.h"
#include "sys.h"
#include "util.h"

#define DO 0
#define UNDO 1

static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
	struct gfs2_sbd *sdp;

	sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
	if (!sdp)
		return NULL;

	sb->s_fs_info = sdp;
	sdp->sd_vfs = sb;

	gfs2_tune_init(&sdp->sd_tune);

	INIT_LIST_HEAD(&sdp->sd_reclaim_list);
	spin_lock_init(&sdp->sd_reclaim_lock);
	init_waitqueue_head(&sdp->sd_reclaim_wq);

	mutex_init(&sdp->sd_inum_mutex);
	spin_lock_init(&sdp->sd_statfs_spin);
	mutex_init(&sdp->sd_statfs_mutex);

	spin_lock_init(&sdp->sd_rindex_spin);
	mutex_init(&sdp->sd_rindex_mutex);
	INIT_LIST_HEAD(&sdp->sd_rindex_list);
	INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
	INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);

	INIT_LIST_HEAD(&sdp->sd_jindex_list);
	spin_lock_init(&sdp->sd_jindex_spin);
	mutex_init(&sdp->sd_jindex_mutex);

	INIT_LIST_HEAD(&sdp->sd_quota_list);
	spin_lock_init(&sdp->sd_quota_spin);
	mutex_init(&sdp->sd_quota_mutex);

	spin_lock_init(&sdp->sd_log_lock);

	INIT_LIST_HEAD(&sdp->sd_log_le_gl);
	INIT_LIST_HEAD(&sdp->sd_log_le_buf);
	INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
	INIT_LIST_HEAD(&sdp->sd_log_le_rg);
	INIT_LIST_HEAD(&sdp->sd_log_le_databuf);

	mutex_init(&sdp->sd_log_reserve_mutex);
	INIT_LIST_HEAD(&sdp->sd_ail1_list);
	INIT_LIST_HEAD(&sdp->sd_ail2_list);

	init_rwsem(&sdp->sd_log_flush_lock);
	INIT_LIST_HEAD(&sdp->sd_log_flush_list);

	INIT_LIST_HEAD(&sdp->sd_revoke_list);

	mutex_init(&sdp->sd_freeze_lock);

	return sdp;
}

static void init_vfs(struct super_block *sb, unsigned noatime)
{
	struct gfs2_sbd *sdp = sb->s_fs_info;

	sb->s_magic = GFS2_MAGIC;
	sb->s_op = &gfs2_super_ops;
	sb->s_export_op = &gfs2_export_ops;
	sb->s_time_gran = 1;
	sb->s_maxbytes = MAX_LFS_FILESIZE;

	if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
		set_bit(noatime, &sdp->sd_flags);

	/* Don't let the VFS update atimes.  GFS2 handles this itself. */
	sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
}

static int init_names(struct gfs2_sbd *sdp, int silent)
{
	char *proto, *table;
	int error = 0;

	proto = sdp->sd_args.ar_lockproto;
	table = sdp->sd_args.ar_locktable;

	/*  Try to autodetect  */

	if (!proto[0] || !table[0]) {
		error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
		if (error)
			return error;

		error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
		if (error)
			goto out;

		if (!proto[0])
			proto = sdp->sd_sb.sb_lockproto;
		if (!table[0])
			table = sdp->sd_sb.sb_locktable;
	}

	if (!table[0])
		table = sdp->sd_vfs->s_id;

	snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
	snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);

	table = sdp->sd_table_name;
	while ((table = strchr(table, '/')))
		*table = '_';

out:
	return error;
}

static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
			int undo)
{
	struct task_struct *p;
	int error = 0;

	if (undo)
		goto fail_trans;

	for (sdp->sd_glockd_num = 0;
	     sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
	     sdp->sd_glockd_num++) {
		p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
		error = IS_ERR(p);
		if (error) {
			fs_err(sdp