From c25491747b21536bd56dccb82a109754bbc8d52c Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 27 Aug 2022 19:04:37 -1000 Subject: kernfs: Add KERNFS_REMOVING flags KERNFS_ACTIVATED tracks whether a given node has ever been activated. As a node was only deactivated on removal, this was used for 1. Drain optimization (removed by the previous patch). 2. To hide !activated nodes 3. To avoid double activations 4. Reject adding children to a node being removed 5. Skip activaing a node which is being removed. We want to decouple deactivation from removal so that nodes can be deactivated and hidden dynamically, which makes KERNFS_ACTIVATED useless for all of the above purposes. #1 is already gone. #2 and #3 can instead test whether the node is currently active. A new flag KERNFS_REMOVING is added to explicitly mark nodes which are being removed for #4 and #5. While this leaves KERNFS_ACTIVATED with no users, leave it be as it will be used in a following patch. Cc: Chengming Zhou Tested-by: Chengming Zhou Reviewed-by: Chengming Zhou Signed-off-by: Tejun Heo Link: https://lore.kernel.org/r/20220828050440.734579-7-tj@kernel.org Signed-off-by: Greg Kroah-Hartman --- include/linux/kernfs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 367044d7708c..b77d257c1f7e 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -112,6 +112,7 @@ enum kernfs_node_flag { KERNFS_SUICIDED = 0x0800, KERNFS_EMPTY_DIR = 0x1000, KERNFS_HAS_RELEASE = 0x2000, + KERNFS_REMOVING = 0x4000, }; /* @flags for kernfs_create_root() */ -- cgit v1.2.3-59-g8ed1b