Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[~andy/linux] / Documentation / filesystems / caching / backend-api.txt

diff --git a/Documentation/filesystems/caching/backend-api.txt b/Documentation/filesystems/caching/backend-api.txt
index d78bab9622c63d8ff1b21f9886523f1b90d57ee8..277d1e810670d3678b1991b059758a69a497edef 100644 (file)
--- a/Documentation/filesystems/caching/backend-api.txt
+++ b/Documentation/filesystems/caching/backend-api.txt
@@ -299,6 +299,15 @@ performed on the denizens of the cache.  These are held in a structure of type:
      enough space in the cache to permit this.
 
 
+ (*) Check coherency state of an object [mandatory]:
+
+       int (*check_consistency)(struct fscache_object *object)
+
+     This method is called to have the cache check the saved auxiliary data of
+     the object against the netfs's idea of the state.  0 should be returned
+     if they're consistent and -ESTALE otherwise.  -ENOMEM and -ERESTARTSYS
+     may also be returned.
+
  (*) Update object [mandatory]:
 
        int (*update_object)(struct fscache_object *object)