summaryrefslogtreecommitdiff
path: root/include/linux/kernfs.h
diff options
context:
space:
mode:
authorShaohua Li <shli@fb.com>2017-07-12 21:49:55 +0300
committerJens Axboe <axboe@kernel.dk>2017-07-29 18:00:03 +0300
commit69fd5c391763bd94a40dd152bc72a7f230137150 (patch)
tree9f44111556c0f8ac14410703a79c42289ea768c2 /include/linux/kernfs.h
parent007cc56b7eeca8848021bc43aca2b8607fbe5589 (diff)
downloadlinux-69fd5c391763bd94a40dd152bc72a7f230137150.tar.xz
blktrace: add an option to allow displaying cgroup path
By default we output cgroup id in blktrace. This adds an option to display cgroup path. Since get cgroup path is a relativly heavy operation, we don't enable it by default. with the option enabled, blktrace will output something like this: dd-1353 [007] d..2 293.015252: 8,0 /test/level D R 24 + 8 [dd] Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/kernfs.h')
-rw-r--r--include/linux/kernfs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index d149361e5875..ab25c8b6d9e3 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -358,6 +358,8 @@ struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns);
void kernfs_init(void);
+struct kernfs_node *kernfs_get_node_by_id(struct kernfs_root *root,
+ const union kernfs_node_id *id);
#else /* CONFIG_KERNFS */
static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)