Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[cascardo/linux.git] / fs / xfs / xfs_extfree_item.h

diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h
index 375f68e..4322224 100644 (file)
--- a/fs/xfs/xfs_extfree_item.h
+++ b/fs/xfs/xfs_extfree_item.h
@@ -114,16 +114,20 @@ typedef struct xfs_efd_log_format_64 {
  * Define EFI flag bits. Manipulated by set/clear/test_bit operators.
  */
 #define        XFS_EFI_RECOVERED       1
-#define        XFS_EFI_COMMITTED       2
 
 /*
- * This is the "extent free intention" log item.  It is used
- * to log the fact that some extents need to be free.  It is
- * used in conjunction with the "extent free done" log item
- * described below.
+ * This is the "extent free intention" log item.  It is used to log the fact
+ * that some extents need to be free.  It is used in conjunction with the
+ * "extent free done" log item described below.
+ *
+ * The EFI is reference counted so that it is not freed prior to both the EFI
+ * and EFD being committed and unpinned. This ensures that when the last
+ * reference goes away the EFI will always be in the AIL as it has been
+ * unpinned, regardless of whether the EFD is processed before or after the EFI.
  */
 typedef struct xfs_efi_log_item {
        xfs_log_item_t          efi_item;
+       atomic_t                efi_refcount;
        atomic_t                efi_next_extent;
        unsigned long           efi_flags;      /* misc flags */
        xfs_efi_log_format_t    efi_format;