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authorJason Wang <jasowang@redhat.com>2013-01-30 19:12:30 +0800
committerAnthony Liguori <aliguori@us.ibm.com>2013-02-01 11:03:01 -0600
commit5193e5fbb52a33f1f684b0d42d29a452dfd29e4a (patch)
treeee2db653f5eeacaa8e97aad85ca669f1784f90f8 /net
parent4e4f9ae7da90b55fe77307e58c867aa6b02a7384 (diff)
tap: factor out common tap initialization
This patch factors out the common initialization of tap into a new helper net_init_tap_one(). This will be used by multiqueue tap patches. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'net')
-rw-r--r--net/tap.c130
1 files changed, 73 insertions, 57 deletions
diff --git a/net/tap.c b/net/tap.c
index 5542c98c03..23fb6e0306 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -591,6 +591,73 @@ static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr,
return fd;
}
+static int net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
+ const char *model, const char *name,
+ const char *ifname, const char *script,
+ const char *downscript, const char *vhostfdname,
+ int vnet_hdr, int fd)
+{
+ TAPState *s;
+
+ s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
+ if (!s) {
+ close(fd);
+ return -1;
+ }
+
+ if (tap_set_sndbuf(s->fd, tap) < 0) {
+ return -1;
+ }
+
+ if (tap->has_fd) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
+ } else if (tap->has_helper) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s",
+ tap->helper);
+ } else {
+ const char *downscript;
+
+ downscript = tap->has_downscript ? tap->downscript :
+ DEFAULT_NETWORK_DOWN_SCRIPT;
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "ifname=%s,script=%s,downscript=%s", ifname, script,
+ downscript);
+
+ if (strcmp(downscript, "no") != 0) {
+ snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
+ snprintf(s->down_script_arg, sizeof(s->down_script_arg),
+ "%s", ifname);
+ }
+ }
+
+ if (tap->has_vhost ? tap->vhost :
+ vhostfdname || (tap->has_vhostforce && tap->vhostforce)) {
+ int vhostfd;
+
+ if (tap->has_vhostfd) {
+ vhostfd = monitor_handle_fd_param(cur_mon, vhostfdname);
+ if (vhostfd == -1) {
+ return -1;
+ }
+ } else {
+ vhostfd = -1;
+ }
+
+ s->vhost_net = vhost_net_init(&s->nc, vhostfd,
+ tap->has_vhostforce && tap->vhostforce);
+ if (!s->vhost_net) {
+ error_report("vhost-net requested but could not be initialized");
+ return -1;
+ }
+ } else if (tap->has_vhostfd) {
+ error_report("vhostfd= is not valid without vhost");
+ return -1;
+ }
+
+ return 0;
+}
+
int net_init_tap(const NetClientOptions *opts, const char *name,
NetClientState *peer)
{
@@ -598,10 +665,10 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
int fd, vnet_hdr = 0;
const char *model;
- TAPState *s;
/* for the no-fd, no-helper case */
const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
+ const char *downscript = NULL;
char ifname[128];
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
@@ -647,6 +714,8 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
} else {
script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT;
+ downscript = tap->has_downscript ? tap->downscript :
+ DEFAULT_NETWORK_DOWN_SCRIPT;
fd = net_tap_init(tap, &vnet_hdr, script, ifname, sizeof ifname);
if (fd == -1) {
return -1;
@@ -655,62 +724,9 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
model = "tap";
}
- s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
- if (!s) {
- close(fd);
- return -1;
- }
-
- if (tap_set_sndbuf(s->fd, tap) < 0) {
- return -1;
- }
-
- if (tap->has_fd) {
- snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
- } else if (tap->has_helper) {
- snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s",
- tap->helper);
- } else {
- const char *downscript;
-
- downscript = tap->has_downscript ? tap->downscript :
- DEFAULT_NETWORK_DOWN_SCRIPT;
-
- snprintf(s->nc.info_str, sizeof(s->nc.info_str),
- "ifname=%s,script=%s,downscript=%s", ifname, script,
- downscript);
-
- if (strcmp(downscript, "no") != 0) {
- snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
- snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
- }
- }
-
- if (tap->has_vhost ? tap->vhost :
- tap->has_vhostfd || (tap->has_vhostforce && tap->vhostforce)) {
- int vhostfd;
-
- if (tap->has_vhostfd) {
- vhostfd = monitor_handle_fd_param(cur_mon, tap->vhostfd);
- if (vhostfd == -1) {
- return -1;
- }
- } else {
- vhostfd = -1;
- }
-
- s->vhost_net = vhost_net_init(&s->nc, vhostfd,
- tap->has_vhostforce && tap->vhostforce);
- if (!s->vhost_net) {
- error_report("vhost-net requested but could not be initialized");
- return -1;
- }
- } else if (tap->has_vhostfd) {
- error_report("vhostfd= is not valid without vhost");
- return -1;
- }
-
- return 0;
+ return net_init_tap_one(tap, peer, model, name, ifname, script,
+ downscript, tap->has_vhostfd ? tap->vhostfd : NULL,
+ vnet_hdr, fd);
}
VHostNetState *tap_get_vhost_net(NetClientState *nc)