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>

3 files changed, 31 insertions, 22 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);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index bb685269f832..0d9b64b219e0 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -405,6 +405,14 @@ xfs_parseargs(
                 return EINVAL;
         }
 
+#ifndef CONFIG_XFS_QUOTA
+        if (XFS_IS_QUOTA_RUNNING(mp)) {
+                cmn_err(CE_WARN,
+                        "XFS: quota support not available in this kernel.");
+                return EINVAL;
+        }
+#endif
+
         if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
             (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
                 cmn_err(CE_WARN,
@@ -1098,7 +1106,6 @@ xfs_fs_put_super(
         xfs_freesb(mp);
         xfs_icsb_destroy_counters(mp);
         xfs_close_devices(mp);
-        xfs_qmops_put(mp);
         xfs_dmops_put(mp);
         xfs_free_fsname(mp);
         kfree(mp);
@@ -1168,6 +1175,7 @@ xfs_fs_statfs(
 {
         struct xfs_mount        *mp = XFS_M(dentry->d_sb);
         xfs_sb_t                *sbp = &mp->m_sb;
+        struct xfs_inode        *ip = XFS_I(dentry->d_inode);
         __uint64_t              fakeinos, id;
         xfs_extlen_t            lsize;
 
@@ -1196,7 +1204,10 @@ xfs_fs_statfs(
         statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
         spin_unlock(&mp->m_sb_lock);
 
-        XFS_QM_DQSTATVFS(XFS_I(dentry->d_inode), statp);
+        if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
+            ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
+                              (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
+                xfs_qm_statvfs(ip, statp);
         return 0;
 }
 
@@ -1404,16 +1415,13 @@ xfs_fs_fill_super(
         error = xfs_dmops_get(mp);
         if (error)
                 goto out_free_fsname;
-        error = xfs_qmops_get(mp);
-        if (error)
-                goto out_put_dmops;
 
         if (silent)
                 flags |= XFS_MFSI_QUIET;
 
         error = xfs_open_devices(mp);
         if (error)
-                goto out_put_qmops;
+                goto out_put_dmops;
 
         if (xfs_icsb_init_counters(mp))
                 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
@@ -1482,8 +1490,6 @@ xfs_fs_fill_super(
  out_destroy_counters:
         xfs_icsb_destroy_counters(mp);
         xfs_close_devices(mp);
- out_put_qmops:
-        xfs_qmops_put(mp);
  out_put_dmops:
         xfs_dmops_put(mp);
  out_free_fsname:
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index f7ba76633c29..b06b95c154cc 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -43,6 +43,7 @@
 #include "xfs_buf_item.h"
 #include "xfs_inode_item.h"
 #include "xfs_rw.h"
+#include "xfs_quota.h"
 
 #include <linux/kthread.h>
 #include <linux/freezer.h>
@@ -317,12 +318,12 @@ xfs_quiesce_data(
 
         /* push non-blocking */
         xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_BDFLUSH);
-        XFS_QM_DQSYNC(mp, SYNC_BDFLUSH);
+        xfs_qm_sync(mp, SYNC_BDFLUSH);
         xfs_filestream_flush(mp);
 
         /* push and block */
         xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_WAIT|SYNC_IOWAIT);
-        XFS_QM_DQSYNC(mp, SYNC_WAIT);
+        xfs_qm_sync(mp, SYNC_WAIT);
 
         /* write superblock and hoover up shutdown errors */
         error = xfs_sync_fsdata(mp, 0);
@@ -467,7 +468,7 @@ xfs_sync_worker(
                 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
                 xfs_reclaim_inodes(mp, 0, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
                 /* dgc: errors ignored here */
-                error = XFS_QM_DQSYNC(mp, SYNC_BDFLUSH);
+                error = xfs_qm_sync(mp, SYNC_BDFLUSH);
                 error = xfs_sync_fsdata(mp, SYNC_BDFLUSH);
                 if (xfs_log_need_covered(mp))
                         error = xfs_commit_dummy_trans(mp, XFS_LOG_FORCE);