Btrfs: cleanup the read failure record after write or when the inode is freeing

[deliverable/linux.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 9e2ef27672e55e572c0ea099d200494d8be2274c..78229007f99e9304b9589062b237957a27b8a008 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2138,6 +2138,40 @@ out:
        return 0;
 }
 
+/*
+ * Can be called when
+ * - hold extent lock
+ * - under ordered extent
+ * - the inode is freeing
+ */
+void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
+{
+       struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
+       struct io_failure_record *failrec;
+       struct extent_state *state, *next;
+
+       if (RB_EMPTY_ROOT(&failure_tree->state))
+               return;
+
+       spin_lock(&failure_tree->lock);
+       state = find_first_extent_bit_state(failure_tree, start, EXTENT_DIRTY);
+       while (state) {
+               if (state->start > end)
+                       break;
+
+               ASSERT(state->end <= end);
+
+               next = next_state(state);
+
+               failrec = (struct io_failure_record *)state->private;
+               free_extent_state(state);
+               kfree(failrec);
+
+               state = next;
+       }
+       spin_unlock(&failure_tree->lock);
+}
+
 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
                                struct io_failure_record **failrec_ret)
 {