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Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c74
1 files changed, 16 insertions, 58 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 39cb6591d37d..1aba036dcabf 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -245,38 +245,14 @@ struct super_block *freeze_bdev(struct block_device *bdev)
sb = get_active_super(bdev);
if (!sb)
goto out;
- down_write(&sb->s_umount);
- if (sb->s_flags & MS_RDONLY) {
- sb->s_frozen = SB_FREEZE_TRANS;
- up_write(&sb->s_umount);
+ error = freeze_super(sb);
+ if (error) {
+ deactivate_super(sb);
+ bdev->bd_fsfreeze_count--;
mutex_unlock(&bdev->bd_fsfreeze_mutex);
- return sb;
- }
-
- sb->s_frozen = SB_FREEZE_WRITE;
- smp_wmb();
-
- sync_filesystem(sb);
-
- sb->s_frozen = SB_FREEZE_TRANS;
- smp_wmb();
-
- sync_blockdev(sb->s_bdev);
-
- if (sb->s_op->freeze_fs) {
- error = sb->s_op->freeze_fs(sb);
- if (error) {
- printk(KERN_ERR
- "VFS:Filesystem freeze failed\n");
- sb->s_frozen = SB_UNFROZEN;
- deactivate_locked_super(sb);
- bdev->bd_fsfreeze_count--;
- mutex_unlock(&bdev->bd_fsfreeze_mutex);
- return ERR_PTR(error);
- }
+ return ERR_PTR(error);
}
- up_write(&sb->s_umount);
-
+ deactivate_super(sb);
out:
sync_blockdev(bdev);
mutex_unlock(&bdev->bd_fsfreeze_mutex);
@@ -297,40 +273,22 @@ int thaw_bdev(struct block_device *bdev, struct super_block *sb)
mutex_lock(&bdev->bd_fsfreeze_mutex);
if (!bdev->bd_fsfreeze_count)
- goto out_unlock;
+ goto out;
error = 0;
if (--bdev->bd_fsfreeze_count > 0)
- goto out_unlock;
+ goto out;
if (!sb)
- goto out_unlock;
-
- BUG_ON(sb->s_bdev != bdev);
- down_write(&sb->s_umount);
- if (sb->s_flags & MS_RDONLY)
- goto out_unfrozen;
-
- if (sb->s_op->unfreeze_fs) {
- error = sb->s_op->unfreeze_fs(sb);
- if (error) {
- printk(KERN_ERR
- "VFS:Filesystem thaw failed\n");
- sb->s_frozen = SB_FREEZE_TRANS;
- bdev->bd_fsfreeze_count++;
- mutex_unlock(&bdev->bd_fsfreeze_mutex);
- return error;
- }
- }
-
-out_unfrozen:
- sb->s_frozen = SB_UNFROZEN;
- smp_wmb();
- wake_up(&sb->s_wait_unfrozen);
+ goto out;
- if (sb)
- deactivate_locked_super(sb);
-out_unlock:
+ error = thaw_super(sb);
+ if (error) {
+ bdev->bd_fsfreeze_count++;
+ mutex_unlock(&bdev->bd_fsfreeze_mutex);
+ return error;
+ }
+out:
mutex_unlock(&bdev->bd_fsfreeze_mutex);
return 0;
}