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-rw-r--r--fs/btrfs/tree-log.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 323e12c..978c3a8 100644
--- 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;
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