xfs: Add support for Q_SETINFO

Add support to XFS so that time limits can be set through Q_SETINFO
quotactl.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 37 insertions, 0 deletions

diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index 5775acb0589b..7795e0d01382 100644
--- a/fs/xfs/xfs_quotaops.c
+++ b/fs/xfs/xfs_quotaops.c
@@ -111,6 +111,42 @@ xfs_quota_type(int type)
         }
 }
 
+#define XFS_QC_SETINFO_MASK (QC_TIMER_MASK | QC_WARNS_MASK)
+
+/*
+ * Adjust quota timers & warnings
+ */
+static int
+xfs_fs_set_info(
+        struct super_block      *sb,
+        int                     type,
+        struct qc_info          *info)
+{
+        struct xfs_mount *mp = XFS_M(sb);
+        struct qc_dqblk newlim;
+
+        if (sb->s_flags & MS_RDONLY)
+                return -EROFS;
+        if (!XFS_IS_QUOTA_RUNNING(mp))
+                return -ENOSYS;
+        if (!XFS_IS_QUOTA_ON(mp))
+                return -ESRCH;
+        if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK)
+                return -EINVAL;
+        if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0)
+                return 0;
+
+        newlim.d_fieldmask = info->i_fieldmask;
+        newlim.d_spc_timer = info->i_spc_timelimit;
+        newlim.d_ino_timer = info->i_ino_timelimit;
+        newlim.d_rt_spc_timer = info->i_rt_spc_timelimit;
+        newlim.d_ino_warns = info->i_ino_warnlimit;
+        newlim.d_spc_warns = info->i_spc_warnlimit;
+        newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit;
+
+        return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim);
+}
+
 static unsigned int
 xfs_quota_flags(unsigned int uflags)
 {
@@ -226,6 +262,7 @@ xfs_fs_set_dqblk(
 
 const struct quotactl_ops xfs_quotactl_operations = {
         .get_state              = xfs_fs_get_quota_state,
+        .set_info               = xfs_fs_set_info,
         .quota_enable           = xfs_quota_enable,
         .quota_disable          = xfs_quota_disable,
         .rm_xquota              = xfs_fs_rm_xquota,