[ovs-dev] [PATCH 3/4] netdev-linux: Fix tap device using wrong FD.

Jesse Gross jesse at nicira.com
Wed Sep 30 19:54:03 UTC 2009


Tap devices were doing ioctls on the AF_INET socket, instead of the
FD opened on the tap device.
---
 lib/netdev-linux.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
index 5abf6e1..50a0d2d 100644
--- a/lib/netdev-linux.c
+++ b/lib/netdev-linux.c
@@ -239,9 +239,11 @@ netdev_linux_open(const char *name, char *suffix, int ethertype,
 
         /* Create tap device. */
         ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
-        error = netdev_linux_do_ioctl(&netdev->netdev, &ifr,
-                                      TUNSETIFF, "TUNSETIFF");
-        if (error) {
+        strncpy(ifr.ifr_name, suffix, sizeof ifr.ifr_name);
+        if (ioctl(netdev->tap_fd, TUNSETIFF, &ifr) == -1) {
+            VLOG_WARN("%s: creating tap device failed: %s", suffix,
+                      strerror(errno));
+            error = errno;
             goto error;
         }
 
-- 
1.6.0.4





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