GFS2: Improve statfs and quota usability

GFS2 now has three new mount options, statfs_quantum, quota_quantum and
statfs_percent.  statfs_quantum and quota_quantum simply allow you to
set the tunables of the same name.  Setting setting statfs_quantum to 0
will also turn on the statfs_slow tunable.  statfs_percent accepts an
integer between 0 and 100.  Numbers between 1 and 100 will cause GFS2 to
do any early sync when the local number of blocks free changes by at
least statfs_percent from the totoal number of blocks free.  Setting
statfs_percent to 0 disables this.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 6edb423f90b3..c239b0f969c8 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -430,6 +430,9 @@ struct gfs2_args {
         unsigned int ar_discard:1;              /* discard requests */
         unsigned int ar_errors:2;               /* errors=withdraw | panic */
         int ar_commit;                          /* Commit interval */
+        int ar_statfs_quantum;                  /* The fast statfs interval */
+        int ar_quota_quantum;                   /* The quota interval */
+        int ar_statfs_percent;                  /* The % change to force sync */
 };
 
 struct gfs2_tune {
@@ -558,6 +561,7 @@ struct gfs2_sbd {
         spinlock_t sd_statfs_spin;
         struct gfs2_statfs_change_host sd_statfs_master;
         struct gfs2_statfs_change_host sd_statfs_local;
+        int sd_statfs_force_sync;
 
         /* Resource group stuff */