GFS2: Add get_xstate quota function

This allows querying of the quota state via the XFS quota
API.

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

1 files changed, 23 insertions, 0 deletions

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 6aaa6c5e21bc..e7114be7b449 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -47,6 +47,7 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/dqblk_xfs.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -1375,7 +1376,29 @@ int gfs2_quotad(void *data)
         return 0;
 }
 
+static int gfs2_quota_get_xstate(struct super_block *sb,
+                                 struct fs_quota_stat *fqs)
+{
+        struct gfs2_sbd *sdp = sb->s_fs_info;
+
+        memset(fqs, 0, sizeof(struct fs_quota_stat));
+        fqs->qs_version = FS_QSTAT_VERSION;
+        if (sdp->sd_args.ar_quota == GFS2_QUOTA_ON)
+                fqs->qs_flags = (XFS_QUOTA_UDQ_ENFD | XFS_QUOTA_GDQ_ENFD);
+        else if (sdp->sd_args.ar_quota == GFS2_QUOTA_ACCOUNT)
+                fqs->qs_flags = (XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_GDQ_ACCT);
+        if (sdp->sd_quota_inode) {
+                fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
+                fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
+        }
+        fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
+        fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
+        fqs->qs_incoredqs = atomic_read(&qd_lru_count);
+        return 0;
+}
+
 const struct quotactl_ops gfs2_quotactl_ops = {
         .quota_sync     = gfs2_quota_sync,
+        .get_xstate     = gfs2_quota_get_xstate,
 };