[GFS2] The core of GFS2

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>

1 files changed, 879 insertions, 0 deletions

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
new file mode 100644
index 000000000000..c61a80c439a6
--- /dev/null
+++ b/fs/gfs2/ops_fstype.c
@@ -0,0 +1,879 @@
+/*
+ * 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/blkdev.h>
+#include <linux/kthread.h>
+#include <asm/semaphore.h>
+
+#include "gfs2.h"
+#include "daemon.h"
+#include "glock.h"
+#include "glops.h"
+#include "inode.h"
+#include "lm.h"
+#include "mount.h"
+#include "ops_export.h"
+#include "ops_fstype.h"
+#include "ops_super.h"
+#include "recovery.h"
+#include "rgrp.h"
+#include "super.h"
+#include "unlinked.h"
+#include "sys.h"
+
+#define DO 0
+#define UNDO 1
+
+static struct gfs2_sbd *init_sbd(struct super_block *sb)
+{
+	struct gfs2_sbd *sdp;
+	unsigned int x;
+
+	sdp = vmalloc(sizeof(struct gfs2_sbd));
+	if (!sdp)
+		return NULL;
+
+	memset(sdp, 0, sizeof(struct gfs2_sbd));
+
+	set_v2sdp(sb, sdp);
+	sdp->sd_vfs = sb;
+
+	gfs2_tune_init(&sdp->sd_tune);
+
+	for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
+		sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
+		INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
+	}
+	INIT_LIST_HEAD(&sdp->sd_reclaim_list);
+	spin_lock_init(&sdp->sd_reclaim_lock);
+	init_waitqueue_head(&sdp->sd_reclaim_wq);
+	init_MUTEX(&sdp->sd_invalidate_inodes_mutex);
+
+	init_MUTEX(&sdp->sd_inum_mutex);
+	spin_lock_init(&sdp->sd_statfs_spin);
+	init_MUTEX(&sdp->sd_statfs_mutex);
+
+	spin_lock_init(&sdp->sd_rindex_spin);
+	init_MUTEX(&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);
+	init_MUTEX(&sdp->sd_jindex_mutex);
+
+	INIT_LIST_HEAD(&sdp->sd_unlinked_list);
+	spin_lock_init(&sdp->sd_unlinked_spin);
+	init_MUTEX(&sdp->sd_unlinked_mutex);
+
+	INIT_LIST_HEAD(&sdp->sd_quota_list);
+	spin_lock_init(&sdp->sd_quota_spin);
+	init_MUTEX(&sdp->sd_quota_mutex);
+
+	spin_lock_init(&sdp->sd_log_lock);
+	init_waitqueue_head(&sdp->sd_log_trans_wq);
+	init_waitqueue_head(&sdp->sd_log_flush_wq);
+
+	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);
+
+	INIT_LIST_HEAD(&sdp->sd_log_blks_list);
+	init_waitqueue_head(&sdp->sd_log_blks_wait);
+
+	INIT_LIST_HEAD(&sdp->sd_ail1_list);
+	INIT_LIST_HEAD(&sdp->sd_ail2_list);
+
+	init_MUTEX(&sdp->sd_log_flush_lock);
+	INIT_LIST_HEAD(&sdp->sd_log_flush_list);
+
+	INIT_LIST_HEAD(&sdp->sd_revoke_list);
+
+	init_MUTEX(&sdp->sd_freeze_lock);
+
+	return sdp;
+}
+
+static void init_vfs(struct gfs2_sbd *sdp)
+{
+	struct super_block *sb = sdp->sd_vfs;
+
+	sb->s_magic = GFS2_MAGIC;
+	sb->s_op = &gfs2_super_ops;
+	sb->s_export_op = &gfs2_export_ops;
+	sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+	if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
+		set_bit(SDF_NOATIME, &sdp->sd_flags);
+
+	/* Don't let the VFS update atimes.  GFS2 handles this itself. */
+	sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
+
+	/* Set up the buffer cache and fill in some fake block size values
+	   to allow us to read-in the on-disk superblock. */
+	sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
+	sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
+	sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT;
+	sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
+}
+
+static int init_names(struct gfs2_sbd *sdp, int silent)
+{
+	struct gfs2_sb *sb = NULL;
+	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]) {
+		struct buffer_head *bh;
+		bh = sb_getblk(sdp->sd_vfs,
+			       GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+		lock_buffer(bh);
+		clear_buffer_uptodate(bh);
+		clear_buffer_dirty(bh);
+		unlock_buffer(bh);
+		ll_rw_block(READ, 1, &bh);
+		wait_on_buffer(bh);
+
+		if (!buffer_uptodate(bh)) {
+			brelse(bh);
+			return -EIO;
+		}
+
+		sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
+		if (!sb) {
+			brelse(bh);
+			return -ENOMEM;
+		}
+		gfs2_sb_in(sb, bh->b_data); 
+		brelse(bh);
+
+		error = gfs2_check_sb(sdp, sb, silent);
+		if (error)
+			goto out;
+
+		if (!proto[0])
+			proto = sb->sb_lockproto;
+		if (!table[0])
+			table = 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);
+
+ out:
+	kfree(sb);
+
+	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;
+
+	p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
+	error = IS_ERR(p);
+	if (error) {
+		fs_err(sdp, "can't start scand thread: %d\n", error);
+		return error;
+	}
+	sdp->sd_scand_process = p;
+
+	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, "can't start glockd thread: %d\n", error);
+			goto fail;
+		}
+		sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
+	}
+
+	error = gfs2_glock_nq_num(sdp,
+				  GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
+				  LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
+				  mount_gh);
+	if (error) {
+		fs_err(sdp, "can't acquire mount glock: %d\n", error);
+		goto fail;
+	}
+
+	error = gfs2_glock_nq_num(sdp,
+				  GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
+				  LM_ST_SHARED,
+				  LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
+				  &sdp->sd_live_gh);
+	if (error) {
+		fs_err(sdp, "can't acquire live glock: %d\n", error);
+		goto fail_mount;
+	}
+
+	error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
+			       CREATE, &sdp->sd_rename_gl);
+	if (error) {
+		fs_err(sdp, "can't create rename glock: %d\n", error);
+		goto fail_live;
+	}
+
+	error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
+			       CREATE, &sdp->sd_trans_gl);
+	if (error) {
+		fs_err(sdp, "can't create transaction glock: %d\n", error);
+		goto fail_rename;
+	}
+	set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
+
+	return 0;
+
+ fail_trans:
+	gfs2_glock_put(sdp->sd_trans_gl);
+
+ fail_rename:
+	gfs2_glock_put(sdp->sd_rename_gl);
+
+ fail_live:
+	gfs2_glock_dq_uninit(&sdp->sd_live_gh);
+
+ fail_mount:
+	gfs2_glock_dq_uninit(mount_gh);
+
+ fail:
+	while (sdp->sd_glockd_num--)
+		kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
+
+	kthread_stop(sdp->sd_scand_process);
+
+	return error;
+}
+
+static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
+{
+	struct super_block *sb = sdp->sd_vfs;
+	struct gfs2_holder sb_gh;
+	int error = 0;
+
+	if (undo) {
+		gfs2_inode_put(sdp->sd_master_dir);
+		return 0;
+	}
+	
+	error = gfs2_glock_nq_num(sdp,
+				 GFS2_SB_LOCK, &gfs2_meta_glops,
+				 LM_ST_SHARED, 0, &sb_gh);
+	if (error) {
+		fs_err(sdp, "can't acquire superblock glock: %d\n", error);
+		return error;
+	}
+
+	error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
+	if (error) {
+		fs_err(sdp, "can't read superblock: %d\n", error);
+		goto out;
+	}
+
+	/* Set up the buffer cache and SB for real */
+	error = -EINVAL;
+	if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
+		fs_err(sdp, "FS block size (%u) is too small for device "
+		       "block size (%u)\n",
+		       sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
+		goto out;
+	}
+	if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
+		fs_err(sdp, "FS block size (%u) is too big for machine "
+		       "page size (%u)\n",
+		       sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
+		goto out;
+	}
+
+	/* Get rid of buffers from the original block size */
+	sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
+	sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
+
+	sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
+
+	error = gfs2_lookup_master_dir(sdp);
+	if (error)
+		fs_err(sdp, "can't read in master directory: %d\n", error);
+
+ out:
+	gfs2_glock_dq_uninit(&sb_gh);
+
+	return error;
+}
+
+static int init_journal(struct gfs2_sbd *sdp, int undo)
+{
+	struct gfs2_holder ji_gh;
+	struct task_struct *p;
+	int jindex = 1;
+	int error = 0;
+
+	if (undo) {
+		jindex = 0;
+		goto fail_recoverd;
+	}
+
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
+				   &sdp->sd_jindex);
+	if (error) {
+		fs_err(sdp, "can't lookup journal index: %d\n", error);
+		return error;
+	}
+	set_bit(GLF_STICKY, &sdp->sd_jindex->i_gl->gl_flags);
+
+	/* Load in the journal index special file */
+
+	error = gfs2_jindex_hold(sdp, &ji_gh);
+	if (error) {
+		fs_err(sdp, "can't read journal index: %d\n", error);
+		goto fail;
+	}
+
+	error = -EINVAL;
+	if (!gfs2_jindex_size(sdp)) {
+		fs_err(sdp, "no journals!\n");
+		goto fail_jindex;		
+	}
+
+	if (sdp->sd_args.ar_spectator) {
+		sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
+		sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+	} else {
+		if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
+			fs_err(sdp, "can't mount journal #%u\n",
+			       sdp->sd_lockstruct.ls_jid);
+			fs_err(sdp, "there are only %u journals (0 - %u)\n",
+			       gfs2_jindex_size(sdp),
+			       gfs2_jindex_size(sdp) - 1);
+			goto fail_jindex;
+		}
+		sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
+
+		error = gfs2_glock_nq_num(sdp,
+					  sdp->sd_lockstruct.ls_jid,
+					  &gfs2_journal_glops,
+					  LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
+					  &sdp->sd_journal_gh);
+		if (error) {
+			fs_err(sdp, "can't acquire journal glock: %d\n", error);
+			goto fail_jindex;
+		}
+
+		error = gfs2_glock_nq_init(sdp->sd_jdesc->jd_inode->i_gl,
+					   LM_ST_SHARED,
+					   LM_FLAG_NOEXP | GL_EXACT,
+					   &sdp->sd_jinode_gh);
+		if (error) {
+			fs_err(sdp, "can't acquire journal inode glock: %d\n",
+			       error);
+			goto fail_journal_gh;
+		}
+
+		error = gfs2_jdesc_check(sdp->sd_jdesc);
+		if (error) {
+			fs_err(sdp, "my journal (%u) is bad: %d\n",
+			       sdp->sd_jdesc->jd_jid, error);
+			goto fail_jinode_gh;
+		}
+		sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+	}
+
+	if (sdp->sd_lockstruct.ls_first) {
+		unsigned int x;
+		for (x = 0; x < sdp->sd_journals; x++) {
+			error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
+						     WAIT);
+			if (error) {
+				fs_err(sdp, "error recovering journal %u: %d\n",
+				       x, error);
+				goto fail_jinode_gh;
+			}
+		}
+
+		gfs2_lm_others_may_mount(sdp);
+	} else if (!sdp->sd_args.ar_spectator) {
+		error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
+		if (error) {
+			fs_err(sdp, "error recovering my journal: %d\n", error);
+			goto fail_jinode_gh;
+		}
+	}
+
+	set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
+	gfs2_glock_dq_uninit(&ji_gh);
+	jindex = 0;
+
+	/* Disown my Journal glock */
+
+	sdp->sd_journal_gh.gh_owner = NULL;
+	sdp->sd_jinode_gh.gh_owner = NULL;
+
+	p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
+	error = IS_ERR(p);
+	if (error) {
+		fs_err(sdp, "can't start recoverd thread: %d\n", error);
+		goto fail_jinode_gh;
+	}
+	sdp->sd_recoverd_process = p;
+
+	return 0;
+
+ fail_recoverd:
+	kthread_stop(sdp->sd_recoverd_process);
+
+ fail_jinode_gh:
+	if (!sdp->sd_args.ar_spectator)
+		gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
+
+ fail_journal_gh:
+	if (!sdp->sd_args.ar_spectator)
+		gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
+
+ fail_jindex:
+	gfs2_jindex_free(sdp);
+	if (jindex)
+		gfs2_glock_dq_uninit(&ji_gh);
+
+ fail:
+	gfs2_inode_put(sdp->sd_jindex);
+
+	return error;
+}
+
+int gfs2_lookup_root(struct gfs2_sbd *sdp)
+{
+        int error;
+	struct gfs2_glock *gl;
+
+	error = gfs2_glock_get(sdp, sdp->sd_sb.sb_root_dir.no_addr,
+                               &gfs2_inode_glops, CREATE, &gl);
+        if (!error) {
+               	error = gfs2_inode_get(gl, &sdp->sd_sb.sb_root_dir,
+						CREATE, &sdp->sd_root_dir);
+		if (!error)
+			gfs2_inode_min_init(sdp->sd_root_dir, DT_DIR);
+                gfs2_glock_put(gl);
+        }
+
+        return error;
+}
+
+
+static int init_inodes(struct gfs2_sbd *sdp, int undo)
+{
+	struct inode *inode;
+	struct dentry **dentry = &sdp->sd_vfs->s_root;
+	int error = 0;
+
+	if (undo)
+		goto fail_dput;
+
+	/* Read in the master inode number inode */
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
+				   &sdp->sd_inum_inode);
+	if (error) {
+		fs_err(sdp, "can't read in inum inode: %d\n", error);
+		return error;
+	}
+
+	/* Read in the master statfs inode */
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
+				   &sdp->sd_statfs_inode);
+	if (error) {
+		fs_err(sdp, "can't read in statfs inode: %d\n", error);
+		goto fail;
+	}
+
+	/* Read in the resource index inode */
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
+				   &sdp->sd_rindex);
+	if (error) {
+		fs_err(sdp, "can't get resource index inode: %d\n", error);
+		goto fail_statfs;
+	}
+	set_bit(GLF_STICKY, &sdp->sd_rindex->i_gl->gl_flags);
+	sdp->sd_rindex_vn = sdp->sd_rindex->i_gl->gl_vn - 1;
+
+	/* Read in the quota inode */
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
+				   &sdp->sd_quota_inode);
+	if (error) {
+		fs_err(sdp, "can't get quota file inode: %d\n", error);
+		goto fail_rindex;
+	}
+
+	/* Get the root inode */
+	error = gfs2_lookup_root(sdp);
+	if (error) {
+		fs_err(sdp, "can't read in root inode: %d\n", error);
+		goto fail_qinode;
+	}
+
+	/* Get the root inode/dentry */
+	inode = gfs2_ip2v(sdp->sd_root_dir);
+	if (!inode) {
+		fs_err(sdp, "can't get root inode\n");
+		error = -ENOMEM;
+		goto fail_rooti;
+	}
+
+	*dentry = d_alloc_root(inode);
+	if (!*dentry) {
+		iput(inode);
+		fs_err(sdp, "can't get root dentry\n");
+		error = -ENOMEM;
+		goto fail_rooti;
+	}
+
+	return 0;
+
+ fail_dput:
+	dput(*dentry);
+	*dentry = NULL;
+
+ fail_rooti:
+	gfs2_inode_put(sdp->sd_root_dir);
+
+ fail_qinode:
+	gfs2_inode_put(sdp->sd_quota_inode);
+
+ fail_rindex:
+	gfs2_clear_rgrpd(sdp);
+	gfs2_inode_put(sdp->sd_rindex);
+
+ fail_statfs:
+	gfs2_inode_put(sdp->sd_statfs_inode);
+
+ fail:
+	gfs2_inode_put(sdp->sd_inum_inode);
+
+	return error;
+}
+
+static int init_per_node(struct gfs2_sbd *sdp, int undo)
+{
+	struct gfs2_inode *pn = NULL;
+	char buf[30];
+	int error = 0;
+
+	if (sdp->sd_args.ar_spectator)
+		return 0;
+
+	if (undo)
+		goto fail_qc_gh;
+
+	error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
+	if (error) {
+		fs_err(sdp, "can't find per_node directory: %d\n", error);
+		return error;
+	}
+
+	sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
+	error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
+	if (error) {
+		fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
+		goto fail;
+	}
+
+	sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
+	error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
+	if (error) {
+		fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
+		goto fail_ir_i;
+	}
+
+	sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
+	error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
+	if (error) {
+		fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
+		goto fail_sc_i;
+	}
+
+	sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
+	error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
+	if (error) {
+		fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
+		goto fail_ut_i;
+	}
+
+	gfs2_inode_put(pn);
+	pn = NULL;
+
+	error = gfs2_glock_nq_init(sdp->sd_ir_inode->i_gl,
+				   LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+				   &sdp->sd_ir_gh);
+	if (error) {
+		fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
+		goto fail_qc_i;
+	}
+
+	error = gfs2_glock_nq_init(sdp->sd_sc_inode->i_gl,
+				   LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+				   &sdp->sd_sc_gh);
+	if (error) {
+		fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
+		goto fail_ir_gh;
+	}
+
+	error = gfs2_glock_nq_init(sdp->sd_ut_inode->i_gl,
+				   LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+				   &sdp->sd_ut_gh);
+	if (error) {
+		fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
+		goto fail_sc_gh;
+	}
+
+	error = gfs2_glock_nq_init(sdp->sd_qc_inode->i_gl,
+				   LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
+				   &sdp->sd_qc_gh);
+	if (error) {
+		fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
+		goto fail_ut_gh;
+	}
+
+	return 0;
+
+ fail_qc_gh:
+	gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
+
+ fail_ut_gh:
+	gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
+
+ fail_sc_gh:
+	gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
+
+ fail_ir_gh:
+	gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
+
+ fail_qc_i:
+	gfs2_inode_put(sdp->sd_qc_inode);
+
+ fail_ut_i:
+	gfs2_inode_put(sdp->sd_ut_inode);
+
+ fail_sc_i:
+	gfs2_inode_put(sdp->sd_sc_inode);
+
+ fail_ir_i:
+	gfs2_inode_put(sdp->sd_ir_inode);
+
+ fail:
+	if (pn)
+		gfs2_inode_put(pn);
+	return error;
+}
+
+static int init_threads(struct gfs2_sbd *sdp, int undo)
+{
+	struct task_struct *p;
+	int error = 0;
+
+	if (undo)
+		goto fail_inoded;
+
+	sdp->sd_log_flush_time = jiffies;
+	sdp->sd_jindex_refresh_time = jiffies;
+
+	p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
+	error = IS_ERR(p);
+	if (error) {
+		fs_err(sdp, "can't start logd thread: %d\n", error);
+		return error;
+	}
+	sdp->sd_logd_process = p;
+
+	sdp->sd_statfs_sync_time = jiffies;
+	sdp->sd_quota_sync_time = jiffies;
+
+	p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
+	error = IS_ERR(p);
+	if (error) {
+		fs_err(sdp, "can't start quotad thread: %d\n", error);
+		goto fail;
+	}
+	sdp->sd_quotad_process = p;
+
+	p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
+	error = IS_ERR(p);
+	if (error) {
+		fs_err(sdp, "can't start inoded thread: %d\n", error);
+		goto fail_quotad;
+	}
+	sdp->sd_inoded_process = p;
+
+	return 0;
+
+ fail_inoded:
+	kthread_stop(sdp->sd_inoded_process);
+
+ fail_quotad:
+	kthread_stop(sdp->sd_quotad_process);
+
+ fail:
+	kthread_stop(sdp->sd_logd_process);
+	
+	return error;
+}
+
+/**
+ * fill_super - Read in superblock
+ * @sb: The VFS superblock
+ * @data: Mount options
+ * @silent: Don't complain if it's not a GFS2 filesystem
+ *
+ * Returns: errno
+ */
+
+static int fill_super(struct super_block *sb, void *data, int silent)
+{
+	struct gfs2_sbd *sdp;
+	struct gfs2_holder mount_gh;
+	int error;
+
+	sdp = init_sbd(sb);
+	if (!sdp) {
+		printk("GFS2: can't alloc struct gfs2_sbd\n");
+		return -ENOMEM;
+	}
+
+	error = gfs2_mount_args(sdp, (char *)data, 0);
+	if (error) {
+		printk("GFS2: can't parse mount arguments\n");
+		goto fail;
+	}
+
+	init_vfs(sdp);
+
+	error = init_names(sdp, silent);
+	if (error)
+		goto fail;
+
+	error = gfs2_sys_fs_add(sdp);
+	if (error)
+		goto fail;
+
+	error = gfs2_lm_mount(sdp, silent);
+	if (error)
+		goto fail_sys;
+
+	error = init_locking(sdp, &mount_gh, DO);
+	if (error)
+		goto fail_lm;
+
+	error = init_sb(sdp, silent, DO);
+	if (error)
+		goto fail_locking;
+	
+	error = init_journal(sdp, DO);
+	if (error)
+		goto fail_sb;
+
+	error = init_inodes(sdp, DO);
+	if (error)
+		goto fail_journals;
+
+	error = init_per_node(sdp, DO);
+	if (error)
+		goto fail_inodes;
+
+	error = gfs2_statfs_init(sdp);
+	if (error) {
+		fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
+		goto fail_per_node;
+	}
+
+	error = init_threads(sdp, DO);
+	if (error)
+		goto fail_per_node;
+
+	if (!(sb->s_flags & MS_RDONLY)) {
+		error = gfs2_make_fs_rw(sdp);
+		if (error) {
+			fs_err(sdp, "can't make FS RW: %d\n", error);
+			goto fail_threads;
+		}
+	}
+
+	gfs2_glock_dq_uninit(&mount_gh);
+
+	return 0;
+
+ fail_threads:
+	init_threads(sdp, UNDO);
+
+ fail_per_node:
+	init_per_node(sdp, UNDO);
+
+ fail_inodes:
+	init_inodes(sdp, UNDO);
+
+ fail_journals:
+	init_journal(sdp, UNDO);
+
+ fail_sb:
+	init_sb(sdp, 0, UNDO);
+
+ fail_locking:
+	init_locking(sdp, &mount_gh, UNDO);
+
+ fail_lm:
+	gfs2_gl_hash_clear(sdp, WAIT);
+	gfs2_lm_unmount(sdp);
+	while (invalidate_inodes(sb))
+		yield();
+
+ fail_sys:
+	gfs2_sys_fs_del(sdp);
+
+ fail:
+	vfree(sdp);
+	set_v2sdp(sb, NULL);
+
+	return error;
+}
+
+static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
+				       int flags, const char *dev_name,
+				       void *data)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
+}
+
+struct file_system_type gfs2_fs_type = {
+	.name = "gfs2",
+	.fs_flags = FS_REQUIRES_DEV,
+	.get_sb = gfs2_get_sb,
+	.kill_sb = kill_block_super,
+	.owner = THIS_MODULE,
+};
+