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[PATCH 7/8] xfs: Add support for Q_SETINFO

To: linux-fsdevel@xxxxxxxxxxxxxxx
Subject: [PATCH 7/8] xfs: Add support for Q_SETINFO
From: Jan Kara <jack@xxxxxxx>
Date: Wed, 18 Feb 2015 14:47:53 +0100
Cc: xfs@xxxxxxxxxxx, cluster-devel@xxxxxxxxxx, Steven Whitehouse <swhiteho@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1424267274-11836-1-git-send-email-jack@xxxxxxx>
References: <1424267274-11836-1-git-send-email-jack@xxxxxxx>
Add support to XFS so that time limits can be set through Q_SETINFO
quotactl.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/xfs/xfs_quotaops.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index df9835396c4f..bbe8ddf1f700 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,
-- 
2.1.4

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