xfs: kill xfs_qmops

Kill the quota ops function vector and replace it with direct calls or
stubs in the CONFIG_XFS_QUOTA=n case.

Make sure we check XFS_IS_QUOTA_RUNNING in the right spots.  We can remove
the number of those checks because the XFS_TRANS_DQ_DIRTY flag can't be set
otherwise.

This brings us back closer to the way this code worked in IRIX and earlier
Linux versions, but we keep a lot of the more useful factoring of common
code.

Eventually we should also kill xfs_qm_bhv.c, but that's left for a later
patch.

Reduces the size of the source code by about 250 lines and the size of
XFS module by about 1.5 kilobytes with quotas enabled:

   text	   data	    bss	    dec	    hex	filename
 615957	   2960	   3848	 622765	  980ad	fs/xfs/xfs.o
 617231	   3152	   3848	 624231	  98667	fs/xfs/xfs.o.old

Fallout:

 - xfs_qm_dqattach is split into xfs_qm_dqattach_locked which expects
   the inode locked and xfs_qm_dqattach which does the locking around it,
   thus removing XFS_QMOPT_ILOCKED.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>

1 files changed, 13 insertions, 11 deletions

diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index d0b499418a7d..c7d684f02f89 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -908,7 +908,8 @@ xfs_ioctl_setattr(
         struct xfs_mount        *mp = ip->i_mount;
         struct xfs_trans        *tp;
         unsigned int            lock_flags = 0;
-        struct xfs_dquot        *udqp = NULL, *gdqp = NULL;
+        struct xfs_dquot        *udqp = NULL;
+        struct xfs_dquot        *gdqp = NULL;
         struct xfs_dquot        *olddquot = NULL;
         int                     code;
 
@@ -928,7 +929,7 @@ xfs_ioctl_setattr(
          * because the i_*dquot fields will get updated anyway.
          */
         if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
-                code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
+                code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
                                          ip->i_d.di_gid, fa->fsx_projid,
                                          XFS_QMOPT_PQUOTA, &udqp, &gdqp);
                 if (code)
@@ -963,10 +964,11 @@ xfs_ioctl_setattr(
          * Do a quota reservation only if projid is actually going to change.
          */
         if (mask & FSX_PROJID) {
-                if (XFS_IS_PQUOTA_ON(mp) &&
+                if (XFS_IS_QUOTA_RUNNING(mp) &&
+                    XFS_IS_PQUOTA_ON(mp) &&
                     ip->i_d.di_projid != fa->fsx_projid) {
                         ASSERT(tp);
-                        code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
+                        code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
                                                 capable(CAP_FOWNER) ?
                                                 XFS_QMOPT_FORCE_RES : 0);
                         if (code)       /* out of quota */
@@ -1068,8 +1070,8 @@ xfs_ioctl_setattr(
                  * in the transaction.
                  */
                 if (ip->i_d.di_projid != fa->fsx_projid) {
-                        if (XFS_IS_PQUOTA_ON(mp)) {
-                                olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
+                        if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
+                                olddquot = xfs_qm_vop_chown(tp, ip,
                                                         &ip->i_gdquot, gdqp);
                         }
                         ip->i_d.di_projid = fa->fsx_projid;
@@ -1115,9 +1117,9 @@ xfs_ioctl_setattr(
         /*
          * Release any dquot(s) the inode had kept before chown.
          */
-        XFS_QM_DQRELE(mp, olddquot);
-        XFS_QM_DQRELE(mp, udqp);
-        XFS_QM_DQRELE(mp, gdqp);
+        xfs_qm_dqrele(olddquot);
+        xfs_qm_dqrele(udqp);
+        xfs_qm_dqrele(gdqp);
 
         if (code)
                 return code;
@@ -1131,8 +1133,8 @@ xfs_ioctl_setattr(
         return 0;
 
  error_return:
-        XFS_QM_DQRELE(mp, udqp);
-        XFS_QM_DQRELE(mp, gdqp);
+        xfs_qm_dqrele(udqp);
+        xfs_qm_dqrele(gdqp);
         xfs_trans_cancel(tp, 0);
         if (lock_flags)
                 xfs_iunlock(ip, lock_flags);