convert btrfs to ->evict_inode()

NB: do we want btrfs_wait_ordered_range() on eviction of
inodes with positive i_nlink on subvolume with zero root_refs?
If not, btrfs_evict_inode() can be simplified by unconditionally
bailing out in case of i_nlink > 0 in the very beginning...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 95eac0116963..ce02199ec4e5 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3668,7 +3668,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
         return err;
 }
 
-void btrfs_delete_inode(struct inode *inode)
+void btrfs_evict_inode(struct inode *inode)
 {
         struct btrfs_trans_handle *trans;
         struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -3676,10 +3676,14 @@ void btrfs_delete_inode(struct inode *inode)
         int ret;
 
         truncate_inode_pages(&inode->i_data, 0);
+        if (inode->i_nlink && btrfs_root_refs(&root->root_item) != 0)
+                goto no_delete;
+
         if (is_bad_inode(inode)) {
                 btrfs_orphan_del(NULL, inode);
                 goto no_delete;
         }
+        /* do we really want it for ->i_nlink > 0 and zero btrfs_root_refs? */
         btrfs_wait_ordered_range(inode, 0, (u64)-1);
 
         if (root->fs_info->log_root_recovering) {
@@ -3729,7 +3733,7 @@ void btrfs_delete_inode(struct inode *inode)
         btrfs_end_transaction(trans, root);
         btrfs_btree_balance_dirty(root, nr);
 no_delete:
-        clear_inode(inode);
+        end_writeback(inode);
         return;
 }