btrfs: Split btrfs_del_delalloc_inode into 2 functions

This is in preparation of fixing delalloc inodes leakage on transaction
abort. Also export the new function.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

2 files changed, 12 insertions, 3 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 2771cc56a622..0d422c9908b8 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3182,6 +3182,8 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
                               u64 *orig_start, u64 *orig_block_len,
                               u64 *ram_bytes);
 
+void __btrfs_del_delalloc_inode(struct btrfs_root *root,
+                                struct btrfs_inode *inode);
 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d241285a0d2a..8e604e7071f1 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1742,12 +1742,12 @@ static void btrfs_add_delalloc_inodes(struct btrfs_root *root,
         spin_unlock(&root->delalloc_lock);
 }
 
-static void btrfs_del_delalloc_inode(struct btrfs_root *root,
-                                     struct btrfs_inode *inode)
+
+void __btrfs_del_delalloc_inode(struct btrfs_root *root,
+                                struct btrfs_inode *inode)
 {
         struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb);
 
-        spin_lock(&root->delalloc_lock);
         if (!list_empty(&inode->delalloc_inodes)) {
                 list_del_init(&inode->delalloc_inodes);
                 clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
@@ -1760,6 +1760,13 @@ static void btrfs_del_delalloc_inode(struct btrfs_root *root,
                         spin_unlock(&fs_info->delalloc_root_lock);
                 }
         }
+}
+
+static void btrfs_del_delalloc_inode(struct btrfs_root *root,
+                                     struct btrfs_inode *inode)
+{
+        spin_lock(&root->delalloc_lock);
+        __btrfs_del_delalloc_inode(root, inode);
         spin_unlock(&root->delalloc_lock);
 }