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tap-linux: Convert tap_open() to Error 

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1431691143-1015-12-git-send-email-armbru@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Markus Armbruster 2015-05-15 13:58:59 +02:00 committed by Stefan Hajnoczi
parent 468dd82408
commit 47896e2fd3
1 changed files with 9 additions and 8 deletions
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17
net/tap-linux.c
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@ -39,7 +39,6 @@
int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
int vnet_hdr_required, int mq_required, Error **errp)
{
/* FIXME error_setg(errp, ...) on failure */
struct ifreq ifr;
int fd, ret;
int len = sizeof(struct virtio_net_hdr);
@ -47,7 +46,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
TFR(fd = open(PATH_NET_TUN, O_RDWR));
if (fd < 0) {
error_report("could not open %s: %m", PATH_NET_TUN);
error_setg_errno(errp, errno, "could not open %s", PATH_NET_TUN);
return -1;
}
memset(&ifr, 0, sizeof(ifr));
@ -71,8 +70,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
}
if (vnet_hdr_required && !*vnet_hdr) {
error_report("vnet_hdr=1 requested, but no kernel "
"support for IFF_VNET_HDR available");
error_setg(errp, "vnet_hdr=1 requested, but no kernel "
"support for IFF_VNET_HDR available");
close(fd);
return -1;
}
@ -87,8 +86,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
if (mq_required) {
if (!(features & IFF_MULTI_QUEUE)) {
error_report("multiqueue required, but no kernel "
"support for IFF_MULTI_QUEUE available");
error_setg(errp, "multiqueue required, but no kernel "
"support for IFF_MULTI_QUEUE available");
close(fd);
return -1;
} else {
@ -103,9 +102,11 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
if (ret != 0) {
if (ifname[0] != '\0') {
error_report("could not configure %s (%s): %m", PATH_NET_TUN, ifr.ifr_name);
error_setg_errno(errp, errno, "could not configure %s (%s)",
PATH_NET_TUN, ifr.ifr_name);
} else {
error_report("could not configure %s: %m", PATH_NET_TUN);
error_setg_errno(errp, errno, "could not configure %s",
PATH_NET_TUN);
}
close(fd);
return -1;