btrfs: Don't BUG_ON alloc_path errors in btrfs_read_locked_inode

btrfs_iget() also needed an update so that errors from btrfs_locked_inode()
are caught and bubbled back up.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a0faf7d..8882999 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2518,7 +2518,9 @@ static void btrfs_read_locked_inode(struct inode *inode)
                filled = true;
 
        path = btrfs_alloc_path();
-       BUG_ON(!path);
+       if (!path)
+               goto make_bad;
+
        path->leave_spinning = 1;
        memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
 
@@ -3973,6 +3975,7 @@ struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
                         struct btrfs_root *root, int *new)
 {
        struct inode *inode;
+       int bad_inode = 0;
 
        inode = btrfs_iget_locked(s, location->objectid, root);
        if (!inode)
@@ -3982,10 +3985,19 @@ struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
                BTRFS_I(inode)->root = root;
                memcpy(&BTRFS_I(inode)->location, location, sizeof(*location));
                btrfs_read_locked_inode(inode);
-               inode_tree_add(inode);
-               unlock_new_inode(inode);
-               if (new)
-                       *new = 1;
+               if (!is_bad_inode(inode)) {
+                       inode_tree_add(inode);
+                       unlock_new_inode(inode);
+                       if (new)
+                               *new = 1;
+               } else {
+                       bad_inode = 1;
+               }
+       }
+
+       if (bad_inode) {
+               iput(inode);
+               inode = ERR_PTR(-ESTALE);
        }
 
        return inode;