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net: move linux code into net/tap-linux.c

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Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Mark McLoughlin 2009-10-22 17:49:12 +01:00 • committed by Anthony Liguori
parent dffcb71cb5
commit c28b1c1007
3 changed files with 79 additions and 47 deletions
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47
net/tap.c
View file

@ -38,9 +38,7 @@
#include "qemu-char.h"
#include "qemu-common.h"
#ifdef __linux__
#include "net/tap-linux.h"
#endif
/* Maximum GSO packet size (64k) plus plenty of room for
* the ethernet and virtio_net headers
@ -347,51 +345,6 @@ static TAPState *net_tap_fd_init(VLANState *vlan,
return s;
}
int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
{
struct ifreq ifr;
int fd, ret;
TFR(fd = open("/dev/net/tun", O_RDWR));
if (fd < 0) {
fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (*vnet_hdr) {
unsigned int features;
if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
features & IFF_VNET_HDR) {
*vnet_hdr = 1;
ifr.ifr_flags |= IFF_VNET_HDR;
}
if (vnet_hdr_required && !*vnet_hdr) {
qemu_error("vnet_hdr=1 requested, but no kernel "
"support for IFF_VNET_HDR available");
close(fd);
return -1;
}
}
if (ifname[0] != '\0')
pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
else
pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
if (ret != 0) {
fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
close(fd);
return -1;
}
pstrcpy(ifname, ifname_size, ifr.ifr_name);
fcntl(fd, F_SETFL, O_NONBLOCK);
return fd;
}
static int launch_script(const char *setup_script, const char *ifname, int fd)
{
sigset_t oldmask, mask;