qemu/net/tap-linux.c

4  * Copyright (c) 2003-2008 Fabrice Bellard
9  * in the Software without restriction, including without limitation the rights
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 #include "tap-linux.h"
35 #include "qemu/error-report.h"
46     unsigned int features;  in tap_open()  local
54         fd = -1;  in tap_open()
61             return -1;  in tap_open()
67     if (ioctl(fd, TUNGETFEATURES, &features) == -1) {  in tap_open()
69         features = 0;  in tap_open()
72     if (features & IFF_ONE_QUEUE) {  in tap_open()
77         if (features & IFF_VNET_HDR) {  in tap_open()
88             return -1;  in tap_open()
91          * Make sure vnet header size has the default value: for a persistent  in tap_open()
100         if (!(features & IFF_MULTI_QUEUE)) {  in tap_open()
104             return -1;  in tap_open()
124         return -1;  in tap_open()
147     sndbuf = !tap->has_sndbuf       ? TAP_DEFAULT_SNDBUF :  in tap_set_sndbuf()
148              tap->sndbuf > INT_MAX  ? INT_MAX :  in tap_set_sndbuf()
149              tap->sndbuf;  in tap_set_sndbuf()
155     if (ioctl(fd, TUNSETSNDBUF, &sndbuf) == -1 && tap->has_sndbuf) {  in tap_set_sndbuf()
169         return -1;  in tap_probe_vnet_hdr()
201     if (ioctl(fd, TUNSETVNETHDRSZ, &len) == -1) {  in tap_fd_set_vnet_hdr_len()
218         return -errno;  in tap_fd_set_vnet_le()
235         return -errno;  in tap_fd_set_vnet_be()
325         return -1;  in tap_fd_get_ifname()
339        return -1;  in tap_fd_set_steering_ebpf()