From 437fd90c0250dee670290f9b714253671a990160 Mon Sep 17 00:00:00 2001
From: José Pekkarinen <jose.pekkarinen@nokia.com>
Date: Wed, 18 May 2016 13:18:31 +0300
Subject: These changes are the raw update to qemu-2.6.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Collission happened in the following patches:

migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)

The code provided by the patches was already in the upstreamed
version.

Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
---
 qemu/net/tap-bsd.c | 42 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 6 deletions(-)

(limited to 'qemu/net/tap-bsd.c')

diff --git a/qemu/net/tap-bsd.c b/qemu/net/tap-bsd.c
index 7028d9be9..c506ac31d 100644
--- a/qemu/net/tap-bsd.c
+++ b/qemu/net/tap-bsd.c
@@ -22,8 +22,10 @@
  * THE SOFTWARE.
  */
 
+#include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "tap_int.h"
-#include "qemu-common.h"
+#include "qemu/cutils.h"
 #include "sysemu/sysemu.h"
 #include "qemu/error-report.h"
 
@@ -109,8 +111,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
 
 #define PATH_NET_TAP "/dev/tap"
 
-int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
-             int vnet_hdr_required, int mq_required, Error **errp)
+static int tap_open_clone(char *ifname, int ifname_size, Error **errp)
 {
     int fd, s, ret;
     struct ifreq ifr;
@@ -126,7 +127,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
     ret = ioctl(fd, TAPGIFNAME, (void *)&ifr);
     if (ret < 0) {
         error_setg_errno(errp, errno, "could not get tap interface name");
-        goto error;
+        close(fd);
+        return -1;
     }
 
     if (ifname[0] != '\0') {
@@ -135,19 +137,47 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
         if (s < 0) {
             error_setg_errno(errp, errno,
                              "could not open socket to set interface name");
-            goto error;
+            close(fd);
+            return -1;
         }
         ifr.ifr_data = ifname;
         ret = ioctl(s, SIOCSIFNAME, (void *)&ifr);
         close(s);
         if (ret < 0) {
             error_setg(errp, "could not set tap interface name");
-            goto error;
+            close(fd);
+            return -1;
         }
     } else {
         pstrcpy(ifname, ifname_size, ifr.ifr_name);
     }
 
+    return fd;
+}
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+             int vnet_hdr_required, int mq_required, Error **errp)
+{
+    int fd = -1;
+
+    /* If the specified tap device already exists just use it. */
+    if (ifname[0] != '\0') {
+        char dname[100];
+        snprintf(dname, sizeof dname, "/dev/%s", ifname);
+        TFR(fd = open(dname, O_RDWR));
+        if (fd < 0 && errno != ENOENT) {
+            error_setg_errno(errp, errno, "could not open %s", dname);
+            return -1;
+        }
+    }
+
+    if (fd < 0) {
+        /* Tap device not specified or does not exist. */
+        if ((fd = tap_open_clone(ifname, ifname_size, errp)) < 0) {
+            return -1;
+        }
+    }
+
     if (*vnet_hdr) {
         /* BSD doesn't have IFF_VNET_HDR */
         *vnet_hdr = 0;
-- 
cgit 1.2.3-korg