Merge remote-tracking branches 'regulator/topic/fixed', 'regulator/topic/id-const...

[karo-tx-linux.git] / include / linux / kernfs.h

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index b0122dc6f96a0a21324f86b5a28c725ac3ea74cf..ca1be5c9136c4557de511143b4c9b36e1eec3734 100644 (file)
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -50,7 +50,24 @@ enum kernfs_node_flag {
 
 /* @flags for kernfs_create_root() */
 enum kernfs_root_flag {
-       KERNFS_ROOT_CREATE_DEACTIVATED = 0x0001,
+       /*
+        * kernfs_nodes are created in the deactivated state and invisible.
+        * They require explicit kernfs_activate() to become visible.  This
+        * can be used to make related nodes become visible atomically
+        * after all nodes are created successfully.
+        */
+       KERNFS_ROOT_CREATE_DEACTIVATED          = 0x0001,
+
+       /*
+        * For regular flies, if the opener has CAP_DAC_OVERRIDE, open(2)
+        * succeeds regardless of the RW permissions.  sysfs had an extra
+        * layer of enforcement where open(2) fails with -EACCES regardless
+        * of CAP_DAC_OVERRIDE if the permission doesn't have the
+        * respective read or write access at all (none of S_IRUGO or
+        * S_IWUGO) or the respective operation isn't implemented.  The
+        * following flag enables that behavior.
+        */
+       KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK       = 0x0002,
 };
 
 /* type-specific structures for kernfs_node union members */