1 files changed, 29 insertions, 0 deletions

diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index c7314f1771f5..dea86e8967ee 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -27,6 +27,7 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
         case Q_SYNC:
         case Q_GETINFO:
         case Q_XGETQSTAT:
+        case Q_XGETQSTATV:
         case Q_XQUOTASYNC:
                 break;
         /* allow to query information for dquots we "own" */
@@ -217,6 +218,31 @@ static int quota_getxstate(struct super_block *sb, void __user *addr)
         return ret;
 }
 
+static int quota_getxstatev(struct super_block *sb, void __user *addr)
+{
+        struct fs_quota_statv fqs;
+        int ret;
+
+        if (!sb->s_qcop->get_xstatev)
+                return -ENOSYS;
+
+        memset(&fqs, 0, sizeof(fqs));
+        if (copy_from_user(&fqs, addr, 1)) /* Just read qs_version */
+                return -EFAULT;
+
+        /* If this kernel doesn't support user specified version, fail */
+        switch (fqs.qs_version) {
+        case FS_QSTATV_VERSION1:
+                break;
+        default:
+                return -EINVAL;
+        }
+        ret = sb->s_qcop->get_xstatev(sb, &fqs);
+        if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
+                return -EFAULT;
+        return ret;
+}
+
 static int quota_setxquota(struct super_block *sb, int type, qid_t id,
                            void __user *addr)
 {
@@ -293,6 +319,8 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
                 return quota_setxstate(sb, cmd, addr);
         case Q_XGETQSTAT:
                 return quota_getxstate(sb, addr);
+        case Q_XGETQSTATV:
+                return quota_getxstatev(sb, addr);
         case Q_XSETQLIM:
                 return quota_setxquota(sb, type, id, addr);
         case Q_XGETQUOTA:
@@ -317,6 +345,7 @@ static int quotactl_cmd_write(int cmd)
         case Q_GETINFO:
         case Q_SYNC:
         case Q_XGETQSTAT:
+        case Q_XGETQSTATV:
         case Q_XGETQUOTA:
         case Q_XQUOTASYNC:
                 return 0;