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[Qemu-devel] [PATCH] fix network interface tap backend
From: |
Christoph Egger |
Subject: |
[Qemu-devel] [PATCH] fix network interface tap backend |
Date: |
Fri, 17 Jun 2011 10:56:18 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; NetBSD amd64; en-US; rv:1.9.2.17) Gecko/20110523 Lightning/1.0b3pre Thunderbird/3.1.10 |
Fix network interface tap backend work on NetBSD.
It uses an ioctl to get the tap name.
From Manuel Bouyer <address@hidden>
Signed-off-by: Christoph Egger <address@hidden>
diff --git a/net/tap-bsd.c b/net/tap-bsd.c
index 2f3efde..577aafe 100644
--- a/net/tap-bsd.c
+++ b/net/tap-bsd.c
@@ -28,6 +28,8 @@
#include "qemu-error.h"
#ifdef __NetBSD__
+#include <sys/ioctl.h>
+#include <net/if.h>
#include <net/if_tap.h>
#endif
@@ -40,8 +42,12 @@
int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int
vnet_hdr_required)
{
int fd;
+#ifdef TAPGIFNAME
+ struct ifreq ifr;
+#else
char *dev;
struct stat s;
+#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) ||
defined(__OpenBSD__)
/* if no ifname is given, always start the search from tap0/tun0. */
@@ -77,14 +83,30 @@ int tap_open(char *ifname, int ifname_size, int
*vnet_hdr, int vnet_hdr_required
#else
TFR(fd = open("/dev/tap", O_RDWR));
if (fd < 0) {
- fprintf(stderr, "warning: could not open /dev/tap: no virtual
network emulation\n");
+ fprintf(stderr,
+ "warning: could not open /dev/tap: no virtual network
emulation: %s\n",
+ strerror(errno));
return -1;
}
#endif
- fstat(fd, &s);
+#ifdef TAPGIFNAME
+ if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) {
+ fprintf(stderr, "warning: could not get tap name: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+#else
+ if (fstat(fd, &s) < 0) {
+ fprintf(stderr,
+ "warning: could not stat /dev/tap: no virtual network
emulation: %s\n",
+ strerror(errno));
+ return -1;
+ }
dev = devname(s.st_rdev, S_IFCHR);
pstrcpy(ifname, ifname_size, dev);
+#endif
if (*vnet_hdr) {
/* BSD doesn't have IFF_VNET_HDR */
--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85689 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
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