Merge tag 'iommu-updates-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux.git] / fs / quota / quota.c

diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index c7314f1771f5824be95fffb4cd27695494c767ff..dea86e8967ee2c354d489384a83d1492b1dbcba3 100644 (file)
--- 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;