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Diffstat (limited to 'fs/quota/quota.c')
-rw-r--r--fs/quota/quota.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index ea6667083b3e..0a6dd71ea309 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -625,6 +625,34 @@ static int quota_getxquota(struct super_block *sb, int type, qid_t id,
return ret;
}
+/*
+ * Return quota for next active quota >= this id, if any exists,
+ * otherwise return -ESRCH via ->get_nextdqblk.
+ */
+static int quota_getnextxquota(struct super_block *sb, int type, qid_t id,
+ void __user *addr)
+{
+ struct fs_disk_quota fdq;
+ struct qc_dqblk qdq;
+ struct kqid qid;
+ qid_t id_out;
+ int ret;
+
+ if (!sb->s_qcop->get_nextdqblk)
+ return -ENOSYS;
+ qid = make_kqid(current_user_ns(), type, id);
+ if (!qid_valid(qid))
+ return -EINVAL;
+ ret = sb->s_qcop->get_nextdqblk(sb, &qid, &qdq);
+ if (ret)
+ return ret;
+ id_out = from_kqid(current_user_ns(), qid);
+ copy_to_xfs_dqblk(&fdq, &qdq, type, id_out);
+ if (copy_to_user(addr, &fdq, sizeof(fdq)))
+ return -EFAULT;
+ return ret;
+}
+
static int quota_rmxquota(struct super_block *sb, void __user *addr)
{
__u32 flags;
@@ -690,6 +718,8 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
return quota_setxquota(sb, type, id, addr);
case Q_XGETQUOTA:
return quota_getxquota(sb, type, id, addr);
+ case Q_XGETNEXTQUOTA:
+ return quota_getnextxquota(sb, type, id, addr);
case Q_XQUOTASYNC:
if (sb->s_flags & MS_RDONLY)
return -EROFS;
@@ -712,6 +742,7 @@ static int quotactl_cmd_write(int cmd)
case Q_XGETQSTAT:
case Q_XGETQSTATV:
case Q_XGETQUOTA:
+ case Q_XGETNEXTQUOTA:
case Q_XQUOTASYNC:
return 0;
}