[XFS] Need to be able to reset sb_qflags if not mounting with quotas

having previously mounted with quotas.

SGI-PV: 940491
SGI-Modid: xfs-linux:xfs-kern:23388a

Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 75 insertions, 3 deletions

diff --git a/fs/xfs/xfs_qmops.c b/fs/xfs/xfs_qmops.c
index 4f40c92863d5..a6cd6324e946 100644
--- a/fs/xfs/xfs_qmops.c
+++ b/fs/xfs/xfs_qmops.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
@@ -42,7 +42,8 @@
 #include "xfs_dir2.h"
 #include "xfs_dmapi.h"
 #include "xfs_mount.h"
-
+#include "xfs_quota.h"
+#include "xfs_error.h"
 
 STATIC struct xfs_dquot *
 xfs_dqvopchown_default(
@@ -54,8 +55,79 @@ xfs_dqvopchown_default(
         return NULL;
 }
 
+/*
+ * Clear the quotaflags in memory and in the superblock.
+ */
+int
+xfs_mount_reset_sbqflags(xfs_mount_t *mp)
+{
+        int                     error;
+        xfs_trans_t             *tp;
+        unsigned long           s;
+
+        mp->m_qflags = 0;
+        /*
+         * It is OK to look at sb_qflags here in mount path,
+         * without SB_LOCK.
+         */
+        if (mp->m_sb.sb_qflags == 0)
+                return 0;
+        s = XFS_SB_LOCK(mp);
+        mp->m_sb.sb_qflags = 0;
+        XFS_SB_UNLOCK(mp, s);
+
+        /*
+         * if the fs is readonly, let the incore superblock run
+         * with quotas off but don't flush the update out to disk
+         */
+        if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
+                return 0;
+#ifdef QUOTADEBUG
+        xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
+#endif
+        tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
+        if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
+                                      XFS_DEFAULT_LOG_COUNT))) {
+                xfs_trans_cancel(tp, 0);
+                xfs_fs_cmn_err(CE_ALERT, mp,
+                        "xfs_mount_reset_sbqflags: Superblock update failed!");
+                return error;
+        }
+        xfs_mod_sb(tp, XFS_SB_QFLAGS);
+        error = xfs_trans_commit(tp, 0, NULL);
+        return error;
+}
+
+STATIC int
+xfs_noquota_init(
+        xfs_mount_t     *mp,
+        uint            *needquotamount,
+        uint            *quotaflags)
+{
+        int             error = 0;
+
+        *quotaflags = 0;
+        *needquotamount = B_FALSE;
+
+        ASSERT(!XFS_IS_QUOTA_ON(mp));
+
+        /*
+         * If a file system had quotas running earlier, but decided to
+         * mount without -o uquota/pquota/gquota options, revoke the
+         * quotachecked license.
+         */
+        if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
+                cmn_err(CE_NOTE,
+                        "XFS resetting qflags for filesystem %s",
+                        mp->m_fsname);
+
+                error = xfs_mount_reset_sbqflags(mp);
+        }
+        return error;
+}
+
 xfs_qmops_t     xfs_qmcore_stub = {
-        .xfs_qminit             = (xfs_qminit_t) fs_noerr,
+        .xfs_qminit             = (xfs_qminit_t) xfs_noquota_init,
         .xfs_qmdone             = (xfs_qmdone_t) fs_noerr,
         .xfs_qmmount            = (xfs_qmmount_t) fs_noerr,
         .xfs_qmunmount          = (xfs_qmunmount_t) fs_noerr,