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authorTejun Heo <tj@kernel.org>2013-11-28 14:54:41 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-29 18:10:48 -0800
commitbc755553df9ab33f389c1a0a8bd0b4f4646e80ef (patch)
treea77c1a97948ebaa6f9a31e9b580ccc0fb254bead /include/linux/kernfs.h
parentba7443bc656e5236c316b2acacc8b551f872910f (diff)
sysfs, kernfs: make inode number ida per kernfs_root
kernfs is being updated to allow multiple sysfs_dirent hierarchies so that it can also be used by other users. Currently, inode number is allocated using a global ida, sysfs_ino_ida; however, inos for different hierarchies should be handled separately. This patch makes ino allocation per kernfs_root. sysfs_ino_ida is replaced by kernfs_root->ino_ida and sysfs_new_dirent() is updated to take @root and allocate ino from it. ida_simple_get/remove() are used instead of sysfs_ino_lock and sysfs_alloc/free_ino(). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kernfs.h')
-rw-r--r--include/linux/kernfs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index f75548b8ed7a..fad8b986800f 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -11,6 +11,7 @@
#include <linux/err.h>
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/idr.h>
#include <linux/lockdep.h>
struct file;
@@ -23,6 +24,9 @@ struct sysfs_dirent;
struct kernfs_root {
/* published fields */
struct sysfs_dirent *sd;
+
+ /* private fields, do not use outside kernfs proper */
+ struct ida ino_ida;
};
struct sysfs_open_file {