Merge tag 'v4.5-rc5' into devel

[karo-tx-linux.git] / fs / btrfs / tree-log.c

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 323e12cc9d2f522388fe929ed66d4dd946b5881d..978c3a8108936381309de4681e90400aeb86874f 100644 (file)
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -4127,7 +4127,9 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
                                     struct inode *inode,
                                     struct btrfs_path *path,
                                     struct list_head *logged_list,
-                                    struct btrfs_log_ctx *ctx)
+                                    struct btrfs_log_ctx *ctx,
+                                    const u64 start,
+                                    const u64 end)
 {
        struct extent_map *em, *n;
        struct list_head extents;
@@ -4166,7 +4168,13 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
        }
 
        list_sort(NULL, &extents, extent_cmp);
-
+       /*
+        * Collect any new ordered extents within the range. This is to
+        * prevent logging file extent items without waiting for the disk
+        * location they point to being written. We do this only to deal
+        * with races against concurrent lockless direct IO writes.
+        */
+       btrfs_get_logged_extents(inode, logged_list, start, end);
 process:
        while (!list_empty(&extents)) {
                em = list_entry(extents.next, struct extent_map, list);
@@ -4701,7 +4709,7 @@ log_extents:
                        goto out_unlock;
                }
                ret = btrfs_log_changed_extents(trans, root, inode, dst_path,
-                                               &logged_list, ctx);
+                                               &logged_list, ctx, start, end);
                if (ret) {
                        err = ret;
                        goto out_unlock;