44     int fd, ret;  in tap_open()  local
52         fd = open(file, O_RDWR);  in tap_open()
54         fd = -1;  in tap_open()
57     if (fd < 0) {  in tap_open()
58         fd = RETRY_ON_EINTR(open(PATH_NET_TUN, O_RDWR));  in tap_open()
59         if (fd < 0) {  in tap_open()
67     if (ioctl(fd, TUNGETFEATURES, &features) == -1) {  in tap_open()
87             close(fd);  in tap_open()
96         ioctl(fd, TUNSETVNETHDRSZ, &len);  in tap_open()
103             close(fd);  in tap_open()
114     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);  in tap_open()
123         close(fd);  in tap_open()
127     g_unix_set_fd_nonblocking(fd, true, NULL);  in tap_open()
128     return fd;  in tap_open()
143 void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)  in tap_set_sndbuf()  argument
155     if (ioctl(fd, TUNSETSNDBUF, &sndbuf) == -1 && tap->has_sndbuf) {  in tap_set_sndbuf()
160 int tap_probe_vnet_hdr(int fd, Error **errp)  in tap_probe_vnet_hdr()  argument
165     if (ioctl(fd, TUNGETIFF, &ifr) != 0) {  in tap_probe_vnet_hdr()
168                          "Unable to query TUNGETIFF on FD %d", fd);  in tap_probe_vnet_hdr()
175 int tap_probe_has_ufo(int fd)  in tap_probe_has_ufo()  argument
181     if (ioctl(fd, TUNSETOFFLOAD, offload) < 0)  in tap_probe_has_ufo()
187 int tap_probe_has_uso(int fd)  in tap_probe_has_uso()  argument
193     if (ioctl(fd, TUNSETOFFLOAD, offload) < 0) {  in tap_probe_has_uso()
199 void tap_fd_set_vnet_hdr_len(int fd, int len)  in tap_fd_set_vnet_hdr_len()  argument
201     if (ioctl(fd, TUNSETVNETHDRSZ, &len) == -1) {  in tap_fd_set_vnet_hdr_len()
208 int tap_fd_set_vnet_le(int fd, int is_le)  in tap_fd_set_vnet_le()  argument
212     if (!ioctl(fd, TUNSETVNETLE, &arg)) {  in tap_fd_set_vnet_le()
225 int tap_fd_set_vnet_be(int fd, int is_be)  in tap_fd_set_vnet_be()  argument
229     if (!ioctl(fd, TUNSETVNETBE, &arg)) {  in tap_fd_set_vnet_be()
242 void tap_fd_set_offload(int fd, int csum, int tso4,  in tap_fd_set_offload()  argument
248     if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {  in tap_fd_set_offload()
270     if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {  in tap_fd_set_offload()
272         if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {  in tap_fd_set_offload()
274             if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {  in tap_fd_set_offload()
283 int tap_fd_enable(int fd)  in tap_fd_enable()  argument
291     ret = ioctl(fd, TUNSETQUEUE, (void *) &ifr);  in tap_fd_enable()
301 int tap_fd_disable(int fd)  in tap_fd_disable()  argument
309     ret = ioctl(fd, TUNSETQUEUE, (void *) &ifr);  in tap_fd_disable()
318 int tap_fd_get_ifname(int fd, char *ifname)  in tap_fd_get_ifname()  argument
322     if (ioctl(fd, TUNGETIFF, &ifr) != 0) {  in tap_fd_get_ifname()
332 int tap_fd_set_steering_ebpf(int fd, int prog_fd)  in tap_fd_set_steering_ebpf()  argument
334     if (ioctl(fd, TUNSETSTEERINGEBPF, (void *) &prog_fd) != 0) {  in tap_fd_set_steering_ebpf()
336                     " %s with fd: %d, prog_fd: %d",  in tap_fd_set_steering_ebpf()
337                     strerror(errno), fd, prog_fd);  in tap_fd_set_steering_ebpf()