From: Dongli Zhang <dongli.zhang@oracle.com>
Date: Sun, 2 Jul 2017 23:34:12 +0000 (+0800)
Subject: tools/libxc: add interface for GNTTABOP_query_size
X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~1841
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=04e0457e1e786a3a33d1854275fd6cd7ba6306f7;p=xen.git

tools/libxc: add interface for GNTTABOP_query_size

This patch adds new interface for GNTTABOP_query_size in libxc to help
query the current grant table frames and maximum grant table frames for a
specific domain.

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 0ee6331c41..c51bb3b448 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -1606,6 +1606,7 @@ int xc_gnttab_op(xc_interface *xch, int cmd,
                  void * op, int op_size, int count);
 /* Logs iff hypercall bounce fails, otherwise doesn't. */
 
+int xc_gnttab_query_size(xc_interface *xch, struct gnttab_query_size *query);
 int xc_gnttab_get_version(xc_interface *xch, int domid); /* Never logs */
 grant_entry_v1_t *xc_gnttab_map_table_v1(xc_interface *xch, int domid, int *gnt_num);
 grant_entry_v2_t *xc_gnttab_map_table_v2(xc_interface *xch, int domid, int *gnt_num);
diff --git a/tools/libxc/xc_gnttab.c b/tools/libxc/xc_gnttab.c
index af53facd9a..9e6f1fbd09 100644
--- a/tools/libxc/xc_gnttab.c
+++ b/tools/libxc/xc_gnttab.c
@@ -38,6 +38,18 @@ int xc_gnttab_op(xc_interface *xch, int cmd, void * op, int op_size, int count)
     return ret;
 }
 
+int xc_gnttab_query_size(xc_interface *xch, struct gnttab_query_size *query)
+{
+    int rc;
+
+    rc = xc_gnttab_op(xch, GNTTABOP_query_size, query, sizeof(*query), 1);
+
+    if ( rc || (query->status != GNTST_okay) )
+        ERROR("Could not query dom %u's grant size\n", query->dom);
+
+    return rc;
+}
+
 int xc_gnttab_get_version(xc_interface *xch, int domid)
 {
     struct gnttab_get_version query;