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btrfs: factor btrfs_replay_log() out of open_ctree()

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Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Eric Sandeen 2014-08-01 18:12:46 -05:00 committed by David Sterba
parent 2a4581983f
commit 63443bf54a
1 changed files with 53 additions and 40 deletions
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93
fs/btrfs/disk-io.c
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@ -2303,6 +2303,57 @@ static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info,
return 0;
}
static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
struct btrfs_fs_devices *fs_devices)
{
int ret;
struct btrfs_root *tree_root = fs_info->tree_root;
struct btrfs_root *log_tree_root;
struct btrfs_super_block *disk_super = fs_info->super_copy;
u64 bytenr = btrfs_super_log_root(disk_super);
if (fs_devices->rw_devices == 0) {
printk(KERN_WARNING "BTRFS: log replay required "
"on RO media\n");
return -EIO;
}
log_tree_root = btrfs_alloc_root(fs_info);
if (!log_tree_root)
return -ENOMEM;
__setup_root(tree_root->nodesize, tree_root->sectorsize,
tree_root->stripesize, log_tree_root, fs_info,
BTRFS_TREE_LOG_OBJECTID);
log_tree_root->node = read_tree_block(tree_root, bytenr,
fs_info->generation + 1);
if (!log_tree_root->node ||
!extent_buffer_uptodate(log_tree_root->node)) {
printk(KERN_ERR "BTRFS: failed to read log tree\n");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
return -EIO;
}
/* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
if (ret) {
btrfs_error(tree_root->fs_info, ret,
"Failed to recover log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
return ret;
}
if (fs_info->sb->s_flags & MS_RDONLY) {
ret = btrfs_commit_super(tree_root);
if (ret)
return ret;
}
return 0;
}
int open_ctree(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
char *options)
@ -2323,7 +2374,6 @@ int open_ctree(struct super_block *sb,
struct btrfs_root *dev_root;
struct btrfs_root *quota_root;
struct btrfs_root *uuid_root;
struct btrfs_root *log_tree_root;
int ret;
int err = -EINVAL;
int num_backups_tried = 0;
@ -2904,48 +2954,11 @@ retry_root_backup:
/* do not make disk changes in broken FS */
if (btrfs_super_log_root(disk_super) != 0) {
u64 bytenr = btrfs_super_log_root(disk_super);
if (fs_devices->rw_devices == 0) {
printk(KERN_WARNING "BTRFS: log replay required "
"on RO media\n");
err = -EIO;
goto fail_qgroup;
}
log_tree_root = btrfs_alloc_root(fs_info);
if (!log_tree_root) {
err = -ENOMEM;
goto fail_qgroup;
}
__setup_root(nodesize, sectorsize, stripesize,
log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
log_tree_root->node = read_tree_block(tree_root, bytenr,
generation + 1);
if (!log_tree_root->node ||
!extent_buffer_uptodate(log_tree_root->node)) {
printk(KERN_ERR "BTRFS: failed to read log tree\n");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
goto fail_qgroup;
}
/* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
ret = btrfs_replay_log(fs_info, fs_devices);
if (ret) {
btrfs_error(tree_root->fs_info, ret,
"Failed to recover log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
err = ret;
goto fail_qgroup;
}
if (sb->s_flags & MS_RDONLY) {
ret = btrfs_commit_super(tree_root);
if (ret)
goto fail_qgroup;
}
}
ret = btrfs_find_orphan_roots(tree_root);