document ->atomic_open() changes

[muen/linux.git] / Documentation / filesystems / porting

diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 17bb4dc28fae03371c328cc2135b576c4235ab03..c68ea9294b5f02462f2f623daab6ac283b7f27ac 100644 (file)
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -602,3 +602,11 @@ in your dentry operations instead.
        dentry separately, and it now has request_mask and query_flags arguments
        to specify the fields and sync type requested by statx.  Filesystems not
        supporting any statx-specific features may ignore the new arguments.
+--
+[mandatory]
+       ->atomic_open() calling conventions have changed.  Gone is int *opened,
+       along with FILE_OPENED/FILE_CREATED.  In place of those we have
+       FMODE_OPENED/FMODE_CREATED, set in file->f_mode.  Additionally, return
+       value for 'called finish_no_open(), open it yourself' case has become
+       0, not 1.  Since finish_no_open() itself is returning 0 now, that part
+       does not need any changes in ->atomic_open() instances.