GFS2: change gfs2_quota_scan into a shrinker

Deallocation of gfs2_quota_data objects now happens on-demand through a
shrinker instead of routinely deallocating through the quotad daemon.

Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 7cacfde32194..86fe06798711 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -23,6 +23,12 @@
 #include "sys.h"
 #include "util.h"
 #include "glock.h"
+#include "quota.h"
+
+static struct shrinker qd_shrinker = {
+        .shrink = gfs2_shrink_qd_memory,
+        .seeks = DEFAULT_SEEKS,
+};
 
 static void gfs2_init_inode_once(void *foo)
 {
@@ -100,6 +106,8 @@ static int __init init_gfs2_fs(void)
         if (!gfs2_quotad_cachep)
                 goto fail;
 
+        register_shrinker(&qd_shrinker);
+
         error = register_filesystem(&gfs2_fs_type);
         if (error)
                 goto fail;
@@ -117,6 +125,7 @@ static int __init init_gfs2_fs(void)
 fail_unregister:
         unregister_filesystem(&gfs2_fs_type);
 fail:
+        unregister_shrinker(&qd_shrinker);
         gfs2_glock_exit();
 
         if (gfs2_quotad_cachep)
@@ -145,6 +154,7 @@ fail:
 
 static void __exit exit_gfs2_fs(void)
 {
+        unregister_shrinker(&qd_shrinker);
         gfs2_glock_exit();
         gfs2_unregister_debugfs();
         unregister_filesystem(&gfs2_fs_type);