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btrfs: cleanup, reduce temporary variables in btrfs_read_roots 

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2015-02-16 18:44:34 +01:00
parent 6f01105819
commit a4f3d2c4ef
1 changed files with 25 additions and 29 deletions
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54
fs/btrfs/disk-io.c
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@ -2357,11 +2357,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
static int btrfs_read_roots(struct btrfs_fs_info *fs_info,
struct btrfs_root *tree_root)
{
struct btrfs_root *extent_root;
struct btrfs_root *dev_root;
struct btrfs_root *csum_root;
struct btrfs_root *quota_root;
struct btrfs_root *uuid_root;
struct btrfs_root *root;
struct btrfs_key location;
int ret;
@ -2369,45 +2365,45 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info,
location.type = BTRFS_ROOT_ITEM_KEY;
location.offset = 0;
extent_root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(extent_root))
return PTR_ERR(extent_root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &extent_root->state);
fs_info->extent_root = extent_root;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->extent_root = root;
location.objectid = BTRFS_DEV_TREE_OBJECTID;
dev_root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(dev_root))
return PTR_ERR(dev_root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &dev_root->state);
fs_info->dev_root = dev_root;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->dev_root = root;
btrfs_init_devices_late(fs_info);
location.objectid = BTRFS_CSUM_TREE_OBJECTID;
csum_root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(csum_root))
return PTR_ERR(csum_root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &csum_root->state);
fs_info->csum_root = csum_root;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->csum_root = root;
location.objectid = BTRFS_QUOTA_TREE_OBJECTID;
quota_root = btrfs_read_tree_root(tree_root, &location);
if (!IS_ERR(quota_root)) {
set_bit(BTRFS_ROOT_TRACK_DIRTY, &quota_root->state);
root = btrfs_read_tree_root(tree_root, &location);
if (!IS_ERR(root)) {
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->quota_enabled = 1;
fs_info->pending_quota_state = 1;
fs_info->quota_root = quota_root;
fs_info->quota_root = root;
}
location.objectid = BTRFS_UUID_TREE_OBJECTID;
uuid_root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(uuid_root)) {
ret = PTR_ERR(uuid_root);
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
if (ret != -ENOENT)
return ret;
} else {
set_bit(BTRFS_ROOT_TRACK_DIRTY, &uuid_root->state);
fs_info->uuid_root = uuid_root;
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->uuid_root = root;
}
return 0;