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[PATCH 24/25] xfs: Add support for Q_SETINFO

To: linux-fsdevel@xxxxxxxxxxxxxxx
Subject: [PATCH 24/25] xfs: Add support for Q_SETINFO
From: Jan Kara <jack@xxxxxxx>
Date: Thu, 18 Dec 2014 16:37:38 +0100
Cc: xfs@xxxxxxxxxxx, cluster-devel@xxxxxxxxxx, ocfs2-devel@xxxxxxxxxxxxxx, Jan Kara <jack@xxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1418917059-23870-1-git-send-email-jack@xxxxxxx>
References: <1418917059-23870-1-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_qm.h          |  2 ++
 fs/xfs/xfs_qm_syscalls.c | 25 +++++++++++++++++++++++++
 fs/xfs/xfs_quotaops.c    | 16 ++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index f40506f20bd5..19e53d571d69 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -171,6 +171,8 @@ extern int          xfs_qm_scall_setqlim(struct xfs_mount 
*, xfs_dqid_t, uint,
                                        struct qc_dqblk *);
 extern int             xfs_qm_scall_getstate(struct xfs_mount *,
                                        struct qc_state *);
+extern int             xfs_qm_scall_setinfo(struct xfs_mount *, uint,
+                                       struct qc_info *);
 extern int             xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 extern int             xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index b3429a5dfc7b..9ab8c3d6de2e 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -451,6 +451,31 @@ int xfs_qm_scall_getstate(struct xfs_mount *mp, struct 
qc_state *state)
        return 0;
 }
 
+#define XFS_QC_SETINFO_MASK (QC_TIMER_MASK | QC_WARNS_MASK)
+
+/*
+ * Adjust quota timers & warnings
+ */
+int xfs_qm_scall_setinfo(struct xfs_mount *mp, uint type, struct qc_info *info)
+{
+       struct qc_dqblk newlim;
+
+       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, type, &newlim);
+}
+
 #define XFS_QC_MASK \
        (QC_LIMIT_MASK | QC_TIMER_MASK | QC_WARNS_MASK)
 
diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index 698e6faac519..a25f482955a7 100644
--- a/fs/xfs/xfs_quotaops.c
+++ b/fs/xfs/xfs_quotaops.c
@@ -45,6 +45,21 @@ static int xfs_fs_get_quota_state(struct super_block *sb, 
struct qc_state *s)
        return xfs_qm_scall_getstate(XFS_M(sb), s);
 }
 
+static int xfs_fs_set_info(struct super_block *sb, int type,
+                          struct qc_info *info)
+{
+       struct xfs_mount        *mp = XFS_M(sb);
+
+       if (sb->s_flags & MS_RDONLY)
+               return -EROFS;
+       if (!XFS_IS_QUOTA_RUNNING(mp))
+               return -ENOSYS;
+       if (!XFS_IS_QUOTA_ON(mp))
+               return -ESRCH;
+
+       return xfs_qm_scall_setinfo(mp, xfs_quota_type(type), info);
+}
+
 static unsigned int xfs_quota_flags(unsigned int uflags)
 {
        unsigned int flags = 0;
@@ -159,6 +174,7 @@ 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,
-- 
1.8.4.5

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