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[Qemu-devel] [PATCH V3 12/20] tap: introduce a helper to get the name of
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PATCH V3 12/20] tap: introduce a helper to get the name of an interface |
Date: |
Tue, 29 Jan 2013 21:51:24 +0800 |
This patch introduces a helper tap_get_ifname() to get the device name of tap
device. This is needed when ifname is unspecified in the command line and qemu
were asked to create tap device by itself. In this situation, the name were
allocated by kernel, so if multiqueue is asked, we need to fetch its name after
creating the first queue.
Only linux has this support since it's the only platform that supports
multiqueue tap.
Signed-off-by: Jason Wang <address@hidden>
---
include/net/tap.h | 1 +
net/tap-aix.c | 6 ++++++
net/tap-bsd.c | 4 ++++
net/tap-haiku.c | 4 ++++
net/tap-linux.c | 13 +++++++++++++
net/tap-solaris.c | 4 ++++
net/tap_int.h | 1 +
7 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/include/net/tap.h b/include/net/tap.h
index 0caf8c4..c523ff0 100644
--- a/include/net/tap.h
+++ b/include/net/tap.h
@@ -37,6 +37,7 @@ void tap_set_offload(NetClientState *nc, int csum, int tso4,
int tso6, int ecn,
void tap_set_vnet_hdr_len(NetClientState *nc, int len);
int tap_enable(NetClientState *nc);
int tap_disable(NetClientState *nc);
+int tap_get_ifname(NetClientState *nc, char *ifname);
int tap_get_fd(NetClientState *nc);
diff --git a/net/tap-aix.c b/net/tap-aix.c
index 66e0574..e760e9a 100644
--- a/net/tap-aix.c
+++ b/net/tap-aix.c
@@ -69,3 +69,9 @@ int tap_fd_disable(int fd)
{
return -1;
}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
+
diff --git a/net/tap-bsd.c b/net/tap-bsd.c
index cfc7a28..4f22109 100644
--- a/net/tap-bsd.c
+++ b/net/tap-bsd.c
@@ -156,3 +156,7 @@ int tap_fd_disable(int fd)
return -1;
}
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/net/tap-haiku.c b/net/tap-haiku.c
index 664d40f..b3b5fbb 100644
--- a/net/tap-haiku.c
+++ b/net/tap-haiku.c
@@ -70,3 +70,7 @@ int tap_fd_disable(int fd)
return -1;
}
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/net/tap-linux.c b/net/tap-linux.c
index 60ea8d0..6827c2a 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -261,3 +261,16 @@ int tap_fd_disable(int fd)
return ret;
}
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ struct ifreq ifr;
+
+ if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
+ error_report("TUNGETIFF ioctl() failed: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ pstrcpy(ifname, sizeof(ifr.ifr_name), ifr.ifr_name);
+ return 0;
+}
diff --git a/net/tap-solaris.c b/net/tap-solaris.c
index 12cc392..214d95e 100644
--- a/net/tap-solaris.c
+++ b/net/tap-solaris.c
@@ -236,3 +236,7 @@ int tap_fd_disable(int fd)
return -1;
}
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
diff --git a/net/tap_int.h b/net/tap_int.h
index ca1c21b..125f83d 100644
--- a/net/tap_int.h
+++ b/net/tap_int.h
@@ -44,5 +44,6 @@ void tap_fd_set_offload(int fd, int csum, int tso4, int tso6,
int ecn, int ufo);
void tap_fd_set_vnet_hdr_len(int fd, int len);
int tap_fd_enable(int fd);
int tap_fd_disable(int fd);
+int tap_fd_get_ifname(int fd, char *ifname);
#endif /* QEMU_TAP_H */
--
1.7.1
- [Qemu-devel] [PATCH V3 03/20] net: intorduce qemu_del_nic(), (continued)
- [Qemu-devel] [PATCH V3 03/20] net: intorduce qemu_del_nic(), Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 01/20] net: introduce qemu_get_queue(), Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 05/20] net: introduce qemu_net_client_setup(), Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 02/20] net: introduce qemu_get_nic(), Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 06/20] net: introduce NetClientState destructor, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 07/20] net: multiqueue support, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 08/20] tap: import linux multiqueue constants, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 09/20] tap: factor out common tap initialization, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 10/20] tap: add Linux multiqueue support, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 11/20] tap: support enabling or disabling a queue, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 12/20] tap: introduce a helper to get the name of an interface,
Jason Wang <=
- [Qemu-devel] [PATCH V3 15/20] virtio: introduce virtio_del_queue(), Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 13/20] tap: multiqueue support, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 17/20] virtio-net: separate virtqueue from VirtIONet, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 18/20] virtio-net: multiqueue support, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 19/20] virtio-net: migration support for multiqueue, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 20/20] virtio-net: compat multiqueue support, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 16/20] virtio: add a queue_index to VirtQueue, Jason Wang, 2013/01/29
- [Qemu-devel] [PATCH V3 14/20] vhost: multiqueue support, Jason Wang, 2013/01/29