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

Jan Kara
2014-12-18T15:38:05Z

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

Signed-off-by: Jan Kara <jack@suse.cz>
---
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,