xfs: fix internal error from AGFL exhaustion

[platform/kernel/linux-rpi.git] / fs / xfs / xfs_extent_busy.h

diff --git a/fs/xfs/xfs_extent_busy.h b/fs/xfs/xfs_extent_busy.h
index c37bf87..0639aab 100644 (file)
--- a/fs/xfs/xfs_extent_busy.h
+++ b/fs/xfs/xfs_extent_busy.h
@@ -16,9 +16,6 @@ struct xfs_alloc_arg;
 /*
  * Busy block/extent entry.  Indexed by a rbtree in perag to mark blocks that
  * have been freed but whose transactions aren't committed to disk yet.
- *
- * Note that we use the transaction ID to record the transaction, not the
- * transaction structure itself. See xfs_extent_busy_insert() for details.
  */
 struct xfs_extent_busy {
        struct rb_node  rb_node;        /* ag by-bno indexed search tree */
@@ -31,11 +28,32 @@ struct xfs_extent_busy {
 #define XFS_EXTENT_BUSY_SKIP_DISCARD   0x02    /* do not discard */
 };
 
+/*
+ * List used to track groups of related busy extents all the way through
+ * to discard completion.
+ */
+struct xfs_busy_extents {
+       struct xfs_mount        *mount;
+       struct list_head        extent_list;
+       struct work_struct      endio_work;
+
+       /*
+        * Owner is the object containing the struct xfs_busy_extents to free
+        * once the busy extents have been processed. If only the
+        * xfs_busy_extents object needs freeing, then point this at itself.
+        */
+       void                    *owner;
+};
+
 void
 xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
        xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
 
 void
+xfs_extent_busy_insert_discard(struct xfs_perag *pag, xfs_agblock_t bno,
+       xfs_extlen_t len, struct list_head *busy_list);
+
+void
 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
        bool do_discard);