929 lines
21 KiB
C
929 lines
21 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/blkdev.h>
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#include <linux/kthread.h>
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#include <linux/namei.h>
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#include <linux/mount.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/lm_interface.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "daemon.h"
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#include "glock.h"
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#include "glops.h"
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#include "inode.h"
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#include "lm.h"
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#include "mount.h"
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#include "ops_export.h"
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#include "ops_fstype.h"
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#include "ops_super.h"
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#include "recovery.h"
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#include "rgrp.h"
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#include "super.h"
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#include "sys.h"
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#include "util.h"
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#define DO 0
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#define UNDO 1
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extern struct dentry_operations gfs2_dops;
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static struct gfs2_sbd *init_sbd(struct super_block *sb)
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{
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struct gfs2_sbd *sdp;
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sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
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if (!sdp)
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return NULL;
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sb->s_fs_info = sdp;
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sdp->sd_vfs = sb;
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gfs2_tune_init(&sdp->sd_tune);
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INIT_LIST_HEAD(&sdp->sd_reclaim_list);
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spin_lock_init(&sdp->sd_reclaim_lock);
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init_waitqueue_head(&sdp->sd_reclaim_wq);
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mutex_init(&sdp->sd_inum_mutex);
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spin_lock_init(&sdp->sd_statfs_spin);
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mutex_init(&sdp->sd_statfs_mutex);
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spin_lock_init(&sdp->sd_rindex_spin);
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mutex_init(&sdp->sd_rindex_mutex);
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INIT_LIST_HEAD(&sdp->sd_rindex_list);
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INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
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INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
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INIT_LIST_HEAD(&sdp->sd_jindex_list);
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spin_lock_init(&sdp->sd_jindex_spin);
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mutex_init(&sdp->sd_jindex_mutex);
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INIT_LIST_HEAD(&sdp->sd_quota_list);
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spin_lock_init(&sdp->sd_quota_spin);
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mutex_init(&sdp->sd_quota_mutex);
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spin_lock_init(&sdp->sd_log_lock);
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INIT_LIST_HEAD(&sdp->sd_log_le_gl);
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INIT_LIST_HEAD(&sdp->sd_log_le_buf);
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INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
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INIT_LIST_HEAD(&sdp->sd_log_le_rg);
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INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
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mutex_init(&sdp->sd_log_reserve_mutex);
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INIT_LIST_HEAD(&sdp->sd_ail1_list);
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INIT_LIST_HEAD(&sdp->sd_ail2_list);
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init_rwsem(&sdp->sd_log_flush_lock);
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INIT_LIST_HEAD(&sdp->sd_log_flush_list);
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INIT_LIST_HEAD(&sdp->sd_revoke_list);
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mutex_init(&sdp->sd_freeze_lock);
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return sdp;
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}
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static void init_vfs(struct super_block *sb, unsigned noatime)
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{
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struct gfs2_sbd *sdp = sb->s_fs_info;
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sb->s_magic = GFS2_MAGIC;
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sb->s_op = &gfs2_super_ops;
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sb->s_export_op = &gfs2_export_ops;
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sb->s_maxbytes = MAX_LFS_FILESIZE;
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if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
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set_bit(noatime, &sdp->sd_flags);
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/* Don't let the VFS update atimes. GFS2 handles this itself. */
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sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
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}
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static int init_names(struct gfs2_sbd *sdp, int silent)
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{
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struct page *page;
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char *proto, *table;
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int error = 0;
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proto = sdp->sd_args.ar_lockproto;
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table = sdp->sd_args.ar_locktable;
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/* Try to autodetect */
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if (!proto[0] || !table[0]) {
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struct gfs2_sb *sb;
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page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
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if (!page)
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return -ENOBUFS;
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sb = kmap(page);
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gfs2_sb_in(&sdp->sd_sb, sb);
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kunmap(page);
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__free_page(page);
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error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
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if (error)
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goto out;
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if (!proto[0])
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proto = sdp->sd_sb.sb_lockproto;
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if (!table[0])
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table = sdp->sd_sb.sb_locktable;
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}
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if (!table[0])
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table = sdp->sd_vfs->s_id;
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snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
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snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
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out:
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return error;
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}
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static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
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int undo)
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{
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struct task_struct *p;
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int error = 0;
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if (undo)
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goto fail_trans;
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p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
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error = IS_ERR(p);
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if (error) {
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fs_err(sdp, "can't start scand thread: %d\n", error);
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return error;
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}
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sdp->sd_scand_process = p;
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for (sdp->sd_glockd_num = 0;
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sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
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sdp->sd_glockd_num++) {
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p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
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error = IS_ERR(p);
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if (error) {
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fs_err(sdp, "can't start glockd thread: %d\n", error);
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goto fail;
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}
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sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
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}
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error = gfs2_glock_nq_num(sdp,
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GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
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LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
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mount_gh);
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if (error) {
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fs_err(sdp, "can't acquire mount glock: %d\n", error);
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goto fail;
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}
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error = gfs2_glock_nq_num(sdp,
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GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
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LM_ST_SHARED,
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LM_FLAG_NOEXP | GL_EXACT,
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&sdp->sd_live_gh);
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if (error) {
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fs_err(sdp, "can't acquire live glock: %d\n", error);
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goto fail_mount;
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}
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error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
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CREATE, &sdp->sd_rename_gl);
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if (error) {
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fs_err(sdp, "can't create rename glock: %d\n", error);
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goto fail_live;
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}
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error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
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CREATE, &sdp->sd_trans_gl);
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if (error) {
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fs_err(sdp, "can't create transaction glock: %d\n", error);
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goto fail_rename;
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}
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set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
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return 0;
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fail_trans:
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gfs2_glock_put(sdp->sd_trans_gl);
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fail_rename:
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gfs2_glock_put(sdp->sd_rename_gl);
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fail_live:
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gfs2_glock_dq_uninit(&sdp->sd_live_gh);
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fail_mount:
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gfs2_glock_dq_uninit(mount_gh);
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fail:
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while (sdp->sd_glockd_num--)
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kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
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kthread_stop(sdp->sd_scand_process);
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return error;
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}
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static struct inode *gfs2_lookup_root(struct super_block *sb,
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struct gfs2_inum *inum)
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{
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return gfs2_inode_lookup(sb, inum, DT_DIR);
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}
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static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
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{
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struct super_block *sb = sdp->sd_vfs;
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struct gfs2_holder sb_gh;
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struct gfs2_inum *inum;
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struct inode *inode;
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int error = 0;
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if (undo) {
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if (sb->s_root) {
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dput(sb->s_root);
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sb->s_root = NULL;
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}
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return 0;
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}
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error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
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LM_ST_SHARED, 0, &sb_gh);
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if (error) {
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fs_err(sdp, "can't acquire superblock glock: %d\n", error);
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return error;
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}
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error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
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if (error) {
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fs_err(sdp, "can't read superblock: %d\n", error);
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goto out;
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}
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/* Set up the buffer cache and SB for real */
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if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
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error = -EINVAL;
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fs_err(sdp, "FS block size (%u) is too small for device "
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"block size (%u)\n",
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sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
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goto out;
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}
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if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
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error = -EINVAL;
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fs_err(sdp, "FS block size (%u) is too big for machine "
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"page size (%u)\n",
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sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
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goto out;
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}
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sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
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/* Get the root inode */
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inum = &sdp->sd_sb.sb_root_dir;
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if (sb->s_type == &gfs2meta_fs_type)
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inum = &sdp->sd_sb.sb_master_dir;
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inode = gfs2_lookup_root(sb, inum);
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if (IS_ERR(inode)) {
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error = PTR_ERR(inode);
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fs_err(sdp, "can't read in root inode: %d\n", error);
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goto out;
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}
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sb->s_root = d_alloc_root(inode);
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if (!sb->s_root) {
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fs_err(sdp, "can't get root dentry\n");
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error = -ENOMEM;
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iput(inode);
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}
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sb->s_root->d_op = &gfs2_dops;
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out:
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gfs2_glock_dq_uninit(&sb_gh);
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return error;
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}
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static int init_journal(struct gfs2_sbd *sdp, int undo)
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{
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struct gfs2_holder ji_gh;
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struct task_struct *p;
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struct gfs2_inode *ip;
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int jindex = 1;
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int error = 0;
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if (undo) {
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jindex = 0;
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goto fail_recoverd;
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}
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sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
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if (IS_ERR(sdp->sd_jindex)) {
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fs_err(sdp, "can't lookup journal index: %d\n", error);
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return PTR_ERR(sdp->sd_jindex);
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}
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ip = GFS2_I(sdp->sd_jindex);
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set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
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/* Load in the journal index special file */
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error = gfs2_jindex_hold(sdp, &ji_gh);
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if (error) {
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fs_err(sdp, "can't read journal index: %d\n", error);
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goto fail;
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}
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error = -EINVAL;
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if (!gfs2_jindex_size(sdp)) {
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fs_err(sdp, "no journals!\n");
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goto fail_jindex;
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}
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if (sdp->sd_args.ar_spectator) {
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sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
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sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
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} else {
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if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
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fs_err(sdp, "can't mount journal #%u\n",
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sdp->sd_lockstruct.ls_jid);
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fs_err(sdp, "there are only %u journals (0 - %u)\n",
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gfs2_jindex_size(sdp),
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gfs2_jindex_size(sdp) - 1);
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goto fail_jindex;
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}
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sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
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error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
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&gfs2_journal_glops,
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LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
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&sdp->sd_journal_gh);
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if (error) {
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fs_err(sdp, "can't acquire journal glock: %d\n", error);
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goto fail_jindex;
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}
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ip = GFS2_I(sdp->sd_jdesc->jd_inode);
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error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
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LM_FLAG_NOEXP | GL_EXACT,
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&sdp->sd_jinode_gh);
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if (error) {
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fs_err(sdp, "can't acquire journal inode glock: %d\n",
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error);
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goto fail_journal_gh;
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}
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error = gfs2_jdesc_check(sdp->sd_jdesc);
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if (error) {
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fs_err(sdp, "my journal (%u) is bad: %d\n",
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sdp->sd_jdesc->jd_jid, error);
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goto fail_jinode_gh;
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}
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sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
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}
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|
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if (sdp->sd_lockstruct.ls_first) {
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unsigned int x;
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for (x = 0; x < sdp->sd_journals; x++) {
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error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
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if (error) {
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fs_err(sdp, "error recovering journal %u: %d\n",
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x, error);
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goto fail_jinode_gh;
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}
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}
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gfs2_lm_others_may_mount(sdp);
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} else if (!sdp->sd_args.ar_spectator) {
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error = gfs2_recover_journal(sdp->sd_jdesc);
|
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if (error) {
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fs_err(sdp, "error recovering my journal: %d\n", error);
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goto fail_jinode_gh;
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}
|
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}
|
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|
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set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
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gfs2_glock_dq_uninit(&ji_gh);
|
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jindex = 0;
|
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|
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p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
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error = IS_ERR(p);
|
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if (error) {
|
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fs_err(sdp, "can't start recoverd thread: %d\n", error);
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goto fail_jinode_gh;
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}
|
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sdp->sd_recoverd_process = p;
|
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|
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return 0;
|
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|
|
fail_recoverd:
|
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kthread_stop(sdp->sd_recoverd_process);
|
|
fail_jinode_gh:
|
|
if (!sdp->sd_args.ar_spectator)
|
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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);
|
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if (jindex)
|
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gfs2_glock_dq_uninit(&ji_gh);
|
|
fail:
|
|
iput(sdp->sd_jindex);
|
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return error;
|
|
}
|
|
|
|
|
|
static int init_inodes(struct gfs2_sbd *sdp, int undo)
|
|
{
|
|
int error = 0;
|
|
struct gfs2_inode *ip;
|
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struct inode *inode;
|
|
|
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if (undo)
|
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goto fail_qinode;
|
|
|
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inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
|
|
if (IS_ERR(inode)) {
|
|
error = PTR_ERR(inode);
|
|
fs_err(sdp, "can't read in master directory: %d\n", error);
|
|
goto fail;
|
|
}
|
|
sdp->sd_master_dir = inode;
|
|
|
|
error = init_journal(sdp, undo);
|
|
if (error)
|
|
goto fail_master;
|
|
|
|
/* Read in the master inode number inode */
|
|
sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
|
|
if (IS_ERR(sdp->sd_inum_inode)) {
|
|
error = PTR_ERR(sdp->sd_inum_inode);
|
|
fs_err(sdp, "can't read in inum inode: %d\n", error);
|
|
goto fail_journal;
|
|
}
|
|
|
|
|
|
/* Read in the master statfs inode */
|
|
sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
|
|
if (IS_ERR(sdp->sd_statfs_inode)) {
|
|
error = PTR_ERR(sdp->sd_statfs_inode);
|
|
fs_err(sdp, "can't read in statfs inode: %d\n", error);
|
|
goto fail_inum;
|
|
}
|
|
|
|
/* Read in the resource index inode */
|
|
sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
|
|
if (IS_ERR(sdp->sd_rindex)) {
|
|
error = PTR_ERR(sdp->sd_rindex);
|
|
fs_err(sdp, "can't get resource index inode: %d\n", error);
|
|
goto fail_statfs;
|
|
}
|
|
ip = GFS2_I(sdp->sd_rindex);
|
|
set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
|
|
sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
|
|
|
|
/* Read in the quota inode */
|
|
sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
|
|
if (IS_ERR(sdp->sd_quota_inode)) {
|
|
error = PTR_ERR(sdp->sd_quota_inode);
|
|
fs_err(sdp, "can't get quota file inode: %d\n", error);
|
|
goto fail_rindex;
|
|
}
|
|
return 0;
|
|
|
|
fail_qinode:
|
|
iput(sdp->sd_quota_inode);
|
|
fail_rindex:
|
|
gfs2_clear_rgrpd(sdp);
|
|
iput(sdp->sd_rindex);
|
|
fail_statfs:
|
|
iput(sdp->sd_statfs_inode);
|
|
fail_inum:
|
|
iput(sdp->sd_inum_inode);
|
|
fail_journal:
|
|
init_journal(sdp, UNDO);
|
|
fail_master:
|
|
iput(sdp->sd_master_dir);
|
|
fail:
|
|
return error;
|
|
}
|
|
|
|
static int init_per_node(struct gfs2_sbd *sdp, int undo)
|
|
{
|
|
struct inode *pn = NULL;
|
|
char buf[30];
|
|
int error = 0;
|
|
struct gfs2_inode *ip;
|
|
|
|
if (sdp->sd_args.ar_spectator)
|
|
return 0;
|
|
|
|
if (undo)
|
|
goto fail_qc_gh;
|
|
|
|
pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
|
|
if (IS_ERR(pn)) {
|
|
error = PTR_ERR(pn);
|
|
fs_err(sdp, "can't find per_node directory: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
|
|
if (IS_ERR(sdp->sd_ir_inode)) {
|
|
error = PTR_ERR(sdp->sd_ir_inode);
|
|
fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
|
|
goto fail;
|
|
}
|
|
|
|
sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
|
|
if (IS_ERR(sdp->sd_sc_inode)) {
|
|
error = PTR_ERR(sdp->sd_sc_inode);
|
|
fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
|
|
goto fail_ir_i;
|
|
}
|
|
|
|
sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
|
|
if (IS_ERR(sdp->sd_qc_inode)) {
|
|
error = PTR_ERR(sdp->sd_qc_inode);
|
|
fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
|
|
goto fail_ut_i;
|
|
}
|
|
|
|
iput(pn);
|
|
pn = NULL;
|
|
|
|
ip = GFS2_I(sdp->sd_ir_inode);
|
|
error = gfs2_glock_nq_init(ip->i_gl,
|
|
LM_ST_EXCLUSIVE, 0,
|
|
&sdp->sd_ir_gh);
|
|
if (error) {
|
|
fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
|
|
goto fail_qc_i;
|
|
}
|
|
|
|
ip = GFS2_I(sdp->sd_sc_inode);
|
|
error = gfs2_glock_nq_init(ip->i_gl,
|
|
LM_ST_EXCLUSIVE, 0,
|
|
&sdp->sd_sc_gh);
|
|
if (error) {
|
|
fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
|
|
goto fail_ir_gh;
|
|
}
|
|
|
|
ip = GFS2_I(sdp->sd_qc_inode);
|
|
error = gfs2_glock_nq_init(ip->i_gl,
|
|
LM_ST_EXCLUSIVE, 0,
|
|
&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_sc_gh);
|
|
fail_ir_gh:
|
|
gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
|
|
fail_qc_i:
|
|
iput(sdp->sd_qc_inode);
|
|
fail_ut_i:
|
|
iput(sdp->sd_sc_inode);
|
|
fail_ir_i:
|
|
iput(sdp->sd_ir_inode);
|
|
fail:
|
|
if (pn)
|
|
iput(pn);
|
|
return error;
|
|
}
|
|
|
|
static int init_threads(struct gfs2_sbd *sdp, int undo)
|
|
{
|
|
struct task_struct *p;
|
|
int error = 0;
|
|
|
|
if (undo)
|
|
goto fail_quotad;
|
|
|
|
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;
|
|
|
|
return 0;
|
|
|
|
|
|
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(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
error = gfs2_mount_args(sdp, (char *)data, 0);
|
|
if (error) {
|
|
printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
|
|
goto fail;
|
|
}
|
|
|
|
init_vfs(sb, SDF_NOATIME);
|
|
|
|
/* 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;
|
|
|
|
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_inodes(sdp, DO);
|
|
if (error)
|
|
goto fail_sb;
|
|
|
|
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_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:
|
|
kfree(sdp);
|
|
sb->s_fs_info = NULL;
|
|
return error;
|
|
}
|
|
|
|
static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
|
|
const char *dev_name, void *data, struct vfsmount *mnt)
|
|
{
|
|
struct super_block *sb;
|
|
struct gfs2_sbd *sdp;
|
|
int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
|
|
if (error)
|
|
goto out;
|
|
sb = mnt->mnt_sb;
|
|
sdp = sb->s_fs_info;
|
|
sdp->sd_gfs2mnt = mnt;
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static int fill_super_meta(struct super_block *sb, struct super_block *new,
|
|
void *data, int silent)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct inode *inode;
|
|
int error = 0;
|
|
|
|
new->s_fs_info = sdp;
|
|
sdp->sd_vfs_meta = sb;
|
|
|
|
init_vfs(new, SDF_NOATIME);
|
|
|
|
/* Get the master inode */
|
|
inode = igrab(sdp->sd_master_dir);
|
|
|
|
new->s_root = d_alloc_root(inode);
|
|
if (!new->s_root) {
|
|
fs_err(sdp, "can't get root dentry\n");
|
|
error = -ENOMEM;
|
|
iput(inode);
|
|
}
|
|
new->s_root->d_op = &gfs2_dops;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int set_bdev_super(struct super_block *s, void *data)
|
|
{
|
|
s->s_bdev = data;
|
|
s->s_dev = s->s_bdev->bd_dev;
|
|
return 0;
|
|
}
|
|
|
|
static int test_bdev_super(struct super_block *s, void *data)
|
|
{
|
|
return s->s_bdev == data;
|
|
}
|
|
|
|
static struct super_block* get_gfs2_sb(const char *dev_name)
|
|
{
|
|
struct kstat stat;
|
|
struct nameidata nd;
|
|
struct file_system_type *fstype;
|
|
struct super_block *sb = NULL, *s;
|
|
struct list_head *l;
|
|
int error;
|
|
|
|
error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
|
|
if (error) {
|
|
printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n",
|
|
dev_name);
|
|
goto out;
|
|
}
|
|
error = vfs_getattr(nd.mnt, nd.dentry, &stat);
|
|
|
|
fstype = get_fs_type("gfs2");
|
|
list_for_each(l, &fstype->fs_supers) {
|
|
s = list_entry(l, struct super_block, s_instances);
|
|
if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
|
|
(S_ISDIR(stat.mode) && s == nd.dentry->d_inode->i_sb)) {
|
|
sb = s;
|
|
goto free_nd;
|
|
}
|
|
}
|
|
|
|
printk(KERN_WARNING "GFS2: Unrecognized block device or "
|
|
"mount point %s", dev_name);
|
|
|
|
free_nd:
|
|
path_release(&nd);
|
|
out:
|
|
return sb;
|
|
}
|
|
|
|
static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
|
|
const char *dev_name, void *data, struct vfsmount *mnt)
|
|
{
|
|
int error = 0;
|
|
struct super_block *sb = NULL, *new;
|
|
struct gfs2_sbd *sdp;
|
|
char *gfs2mnt = NULL;
|
|
|
|
sb = get_gfs2_sb(dev_name);
|
|
if (!sb) {
|
|
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
|
|
error = -ENOENT;
|
|
goto error;
|
|
}
|
|
sdp = (struct gfs2_sbd*) sb->s_fs_info;
|
|
if (sdp->sd_vfs_meta) {
|
|
printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n");
|
|
error = -EBUSY;
|
|
goto error;
|
|
}
|
|
mutex_lock(&sb->s_bdev->bd_mount_mutex);
|
|
new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
|
|
mutex_unlock(&sb->s_bdev->bd_mount_mutex);
|
|
if (IS_ERR(new)) {
|
|
error = PTR_ERR(new);
|
|
goto error;
|
|
}
|
|
module_put(fs_type->owner);
|
|
new->s_flags = flags;
|
|
strlcpy(new->s_id, sb->s_id, sizeof(new->s_id));
|
|
sb_set_blocksize(new, sb->s_blocksize);
|
|
error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0);
|
|
if (error) {
|
|
up_write(&new->s_umount);
|
|
deactivate_super(new);
|
|
goto error;
|
|
}
|
|
|
|
new->s_flags |= MS_ACTIVE;
|
|
|
|
/* Grab a reference to the gfs2 mount point */
|
|
atomic_inc(&sdp->sd_gfs2mnt->mnt_count);
|
|
return simple_set_mnt(mnt, new);
|
|
error:
|
|
if (gfs2mnt)
|
|
kfree(gfs2mnt);
|
|
return error;
|
|
}
|
|
|
|
static void gfs2_kill_sb(struct super_block *sb)
|
|
{
|
|
kill_block_super(sb);
|
|
}
|
|
|
|
static void gfs2_kill_sb_meta(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
generic_shutdown_super(sb);
|
|
sdp->sd_vfs_meta = NULL;
|
|
atomic_dec(&sdp->sd_gfs2mnt->mnt_count);
|
|
}
|
|
|
|
struct file_system_type gfs2_fs_type = {
|
|
.name = "gfs2",
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
.get_sb = gfs2_get_sb,
|
|
.kill_sb = gfs2_kill_sb,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
struct file_system_type gfs2meta_fs_type = {
|
|
.name = "gfs2meta",
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
.get_sb = gfs2_get_sb_meta,
|
|
.kill_sb = gfs2_kill_sb_meta,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|