ext4: simplify i_state checks in __ext4_update_other_inode_time()

[linux-2.6-microblaze.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 45a0303..de0c789 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2194,6 +2194,21 @@ static inline void mark_inode_dirty_sync(struct inode *inode)
        __mark_inode_dirty(inode, I_DIRTY_SYNC);
 }
 
+/*
+ * Returns true if the given inode itself only has dirty timestamps (its pages
+ * may still be dirty) and isn't currently being allocated or freed.
+ * Filesystems should call this if when writing an inode when lazytime is
+ * enabled, they want to opportunistically write the timestamps of other inodes
+ * located very nearby on-disk, e.g. in the same inode block.  This returns true
+ * if the given inode is in need of such an opportunistic update.  Requires
+ * i_lock, or at least later re-checking under i_lock.
+ */
+static inline bool inode_is_dirtytime_only(struct inode *inode)
+{
+       return (inode->i_state & (I_DIRTY_TIME | I_NEW |
+                                 I_FREEING | I_WILL_FREE)) == I_DIRTY_TIME;
+}
+
 extern void inc_nlink(struct inode *inode);
 extern void drop_nlink(struct inode *inode);
 extern void clear_nlink(struct inode *inode);