1 files changed, 176 insertions, 0 deletions

diff --git a/fs/xfs/xfs_qm_bhv.c b/fs/xfs/xfs_qm_bhv.c
new file mode 100644
index 000000000000..a0a829addca9
--- /dev/null
+++ b/fs/xfs/xfs_qm_bhv.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_bit.h"
+#include "xfs_log.h"
+#include "xfs_inum.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_alloc.h"
+#include "xfs_quota.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_inode.h"
+#include "xfs_itable.h"
+#include "xfs_bmap.h"
+#include "xfs_rtalloc.h"
+#include "xfs_error.h"
+#include "xfs_attr.h"
+#include "xfs_buf_item.h"
+#include "xfs_qm.h"
+
+
+STATIC void
+xfs_fill_statvfs_from_dquot(
+        struct kstatfs          *statp,
+        xfs_disk_dquot_t        *dp)
+{
+        __uint64_t              limit;
+
+        limit = dp->d_blk_softlimit ?
+                be64_to_cpu(dp->d_blk_softlimit) :
+                be64_to_cpu(dp->d_blk_hardlimit);
+        if (limit && statp->f_blocks > limit) {
+                statp->f_blocks = limit;
+                statp->f_bfree = statp->f_bavail =
+                        (statp->f_blocks > be64_to_cpu(dp->d_bcount)) ?
+                         (statp->f_blocks - be64_to_cpu(dp->d_bcount)) : 0;
+        }
+
+        limit = dp->d_ino_softlimit ?
+                be64_to_cpu(dp->d_ino_softlimit) :
+                be64_to_cpu(dp->d_ino_hardlimit);
+        if (limit && statp->f_files > limit) {
+                statp->f_files = limit;
+                statp->f_ffree =
+                        (statp->f_files > be64_to_cpu(dp->d_icount)) ?
+                         (statp->f_ffree - be64_to_cpu(dp->d_icount)) : 0;
+        }
+}
+
+
+/*
+ * Directory tree accounting is implemented using project quotas, where
+ * the project identifier is inherited from parent directories.
+ * A statvfs (df, etc.) of a directory that is using project quota should
+ * return a statvfs of the project, not the entire filesystem.
+ * This makes such trees appear as if they are filesystems in themselves.
+ */
+void
+xfs_qm_statvfs(
+        xfs_inode_t             *ip,
+        struct kstatfs          *statp)
+{
+        xfs_mount_t             *mp = ip->i_mount;
+        xfs_dquot_t             *dqp;
+
+        if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
+                xfs_fill_statvfs_from_dquot(statp, &dqp->q_core);
+                xfs_qm_dqput(dqp);
+        }
+}
+
+int
+xfs_qm_newmount(
+        xfs_mount_t     *mp,
+        uint            *needquotamount,
+        uint            *quotaflags)
+{
+        uint            quotaondisk;
+        uint            uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
+
+        quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
+                                (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
+
+        if (quotaondisk) {
+                uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
+                pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
+                gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
+        }
+
+        /*
+         * If the device itself is read-only, we can't allow
+         * the user to change the state of quota on the mount -
+         * this would generate a transaction on the ro device,
+         * which would lead to an I/O error and shutdown
+         */
+
+        if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
+            (!uquotaondisk &&  XFS_IS_UQUOTA_ON(mp)) ||
+             (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
+            (!pquotaondisk &&  XFS_IS_PQUOTA_ON(mp)) ||
+             (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
+            (!gquotaondisk &&  XFS_IS_OQUOTA_ON(mp)))  &&
+            xfs_dev_is_read_only(mp, "changing quota state")) {
+                xfs_warn(mp, "please mount with%s%s%s%s.",
+                        (!quotaondisk ? "out quota" : ""),
+                        (uquotaondisk ? " usrquota" : ""),
+                        (pquotaondisk ? " prjquota" : ""),
+                        (gquotaondisk ? " grpquota" : ""));
+                return XFS_ERROR(EPERM);
+        }
+
+        if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
+                /*
+                 * Call mount_quotas at this point only if we won't have to do
+                 * a quotacheck.
+                 */
+                if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
+                        /*
+                         * If an error occurred, qm_mount_quotas code
+                         * has already disabled quotas. So, just finish
+                         * mounting, and get on with the boring life
+                         * without disk quotas.
+                         */
+                        xfs_qm_mount_quotas(mp);
+                } else {
+                        /*
+                         * Clear the quota flags, but remember them. This
+                         * is so that the quota code doesn't get invoked
+                         * before we're ready. This can happen when an
+                         * inode goes inactive and wants to free blocks,
+                         * or via xfs_log_mount_finish.
+                         */
+                        *needquotamount = B_TRUE;
+                        *quotaflags = mp->m_qflags;
+                        mp->m_qflags = 0;
+                }
+        }
+
+        return 0;
+}
+
+void __init
+xfs_qm_init(void)
+{
+        printk(KERN_INFO "SGI XFS Quota Management subsystem\n");
+        mutex_init(&xfs_Gqm_lock);
+        xfs_qm_init_procfs();
+}
+
+void __exit
+xfs_qm_exit(void)
+{
+        xfs_qm_cleanup_procfs();
+        if (qm_dqzone)
+                kmem_zone_destroy(qm_dqzone);
+        if (qm_dqtrxzone)
+                kmem_zone_destroy(qm_dqtrxzone);
+}