btrfs: root->fs_info cleanup, add fs_info convenience variables
In routines where someptr->fs_info is referenced multiple times, we
introduce a convenience variable. This makes the code considerably
more readable.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 2513a7f..340d9075 100644
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -153,6 +153,7 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
static struct dentry *btrfs_get_parent(struct dentry *child)
{
struct inode *dir = d_inode(child);
+ struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_path *path;
struct extent_buffer *leaf;
@@ -169,7 +170,7 @@ static struct dentry *btrfs_get_parent(struct dentry *child)
key.objectid = root->root_key.objectid;
key.type = BTRFS_ROOT_BACKREF_KEY;
key.offset = (u64)-1;
- root = root->fs_info->tree_root;
+ root = fs_info->tree_root;
} else {
key.objectid = btrfs_ino(dir);
key.type = BTRFS_INODE_REF_KEY;
@@ -205,13 +206,13 @@ static struct dentry *btrfs_get_parent(struct dentry *child)
btrfs_free_path(path);
if (found_key.type == BTRFS_ROOT_BACKREF_KEY) {
- return btrfs_get_dentry(root->fs_info->sb, key.objectid,
+ return btrfs_get_dentry(fs_info->sb, key.objectid,
found_key.offset, 0, 0);
}
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
- return d_obtain_alias(btrfs_iget(root->fs_info->sb, &key, root, NULL));
+ return d_obtain_alias(btrfs_iget(fs_info->sb, &key, root, NULL));
fail:
btrfs_free_path(path);
return ERR_PTR(ret);
@@ -222,6 +223,7 @@ static int btrfs_get_name(struct dentry *parent, char *name,
{
struct inode *inode = d_inode(child);
struct inode *dir = d_inode(parent);
+ struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_path *path;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_inode_ref *iref;
@@ -250,7 +252,7 @@ static int btrfs_get_name(struct dentry *parent, char *name,
key.objectid = BTRFS_I(inode)->root->root_key.objectid;
key.type = BTRFS_ROOT_BACKREF_KEY;
key.offset = (u64)-1;
- root = root->fs_info->tree_root;
+ root = fs_info->tree_root;
} else {
key.objectid = ino;
key.offset = btrfs_ino(dir);