xfs: Define a new function xfs_is_quota_inode()

In preparation for combined pquota/gquota support, define
a new function to check if the given inode is a quota inode.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index b75c9bb6e71e..28a5e8ae3829 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -489,8 +489,7 @@ xfs_qm_need_dqattach(
                 return false;
         if (!XFS_NOT_DQATTACHED(mp, ip))
                 return false;
-        if (ip->i_ino == mp->m_sb.sb_uquotino ||
-            ip->i_ino == mp->m_sb.sb_gquotino)
+        if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
                 return false;
         return true;
 }
@@ -606,8 +605,7 @@ xfs_qm_dqdetach(
 
         trace_xfs_dquot_dqdetach(ip);
 
-        ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
-        ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
+        ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
         if (ip->i_udquot) {
                 xfs_qm_dqrele(ip->i_udquot);
                 ip->i_udquot = NULL;
@@ -1152,7 +1150,7 @@ xfs_qm_dqusage_adjust(
          * rootino must have its resources accounted for, not so with the quota
          * inodes.
          */
-        if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
+        if (xfs_is_quota_inode(&mp->m_sb, ino)) {
                 *res = BULKSTAT_RV_NOTHING;
                 return XFS_ERROR(EINVAL);
         }