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authorEric Blake <eblake@redhat.com>2016-07-13 21:50:23 -0600
committerMarkus Armbruster <armbru@redhat.com>2016-07-19 20:18:02 +0200
commitf394b2e20d9a666fb194fb692179a0eeaca5daea (patch)
tree4d01037fde0500c9bfa746ef852ae32e04b7dbb8 /net/tap.c
parentfaecd40a592dbd8f12d2b3b4783fa05ae22364ea (diff)
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qapi: Change Netdev into a flat union
This is a mostly-mechanical conversion that creates a new flat union 'Netdev' QAPI type that covers all the branches of the former 'NetClientOptions' simple union, where the branches are now listed in a new 'NetClientDriver' enum rather than generated from the simple union. The existence of a flat union has no change to the command line syntax accepted for new code, and will make it possible for a future patch to switch the QMP command to parse a boxed union for no change to valid QMP; but it does have some ripple effect on the C code when dealing with the new types. While making the conversion, note that the 'NetLegacy' type remains unchanged: it applies only to legacy command line options, and will not be ported to QMP, so it should remain a wrapper around a simple union; to avoid confusion, the type named 'NetClientOptions' is now gone, and we introduce 'NetLegacyOptions' in its place. Then, in the C code, we convert from NetLegacy to Netdev as soon as possible, so that the bulk of the net stack only has to deal with one QAPI type, not two. Note that since the old legacy code always rejected 'hubport', we can just omit that branch from the new 'NetLegacyOptions' simple union. Based on an idea originally by Zoltán Kővágó <DirtY.iCE.hu@gmail.com>: Message-Id: <01a527fbf1a5de880091f98cf011616a78adeeee.1441627176.git.DirtY.iCE.hu@gmail.com> although the sed script in that patch no longer applies due to other changes in the tree since then, and I also did some manual cleanups (such as fixing whitespace to keep checkpatch happy). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1468468228-27827-13-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Fixup from Eric squashed in] Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'net/tap.c')
-rw-r--r--net/tap.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/net/tap.c b/net/tap.c
index ceb8c43..7928a09 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -223,7 +223,7 @@ static bool tap_has_ufo(NetClientState *nc)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
return s->has_ufo;
}
@@ -232,7 +232,7 @@ static bool tap_has_vnet_hdr(NetClientState *nc)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
return !!s->host_vnet_hdr_len;
}
@@ -241,7 +241,7 @@ static bool tap_has_vnet_hdr_len(NetClientState *nc, int len)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
return !!tap_probe_vnet_hdr_len(s->fd, len);
}
@@ -250,7 +250,7 @@ static void tap_set_vnet_hdr_len(NetClientState *nc, int len)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) ||
len == sizeof(struct virtio_net_hdr));
@@ -262,7 +262,7 @@ static void tap_using_vnet_hdr(NetClientState *nc, bool using_vnet_hdr)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
assert(!!s->host_vnet_hdr_len == using_vnet_hdr);
s->using_vnet_hdr = using_vnet_hdr;
@@ -336,14 +336,14 @@ static void tap_poll(NetClientState *nc, bool enable)
int tap_get_fd(NetClientState *nc)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
return s->fd;
}
/* fd support */
static NetClientInfo net_tap_info = {
- .type = NET_CLIENT_OPTIONS_KIND_TAP,
+ .type = NET_CLIENT_DRIVER_TAP,
.size = sizeof(TAPState),
.receive = tap_receive,
.receive_raw = tap_receive_raw,
@@ -579,8 +579,8 @@ int net_init_bridge(const Netdev *netdev, const char *name,
TAPState *s;
int fd, vnet_hdr;
- assert(netdev->opts->type == NET_CLIENT_OPTIONS_KIND_BRIDGE);
- bridge = netdev->opts->u.bridge.data;
+ assert(netdev->type == NET_CLIENT_DRIVER_BRIDGE);
+ bridge = &netdev->u.bridge;
helper = bridge->has_helper ? bridge->helper : DEFAULT_BRIDGE_HELPER;
br = bridge->has_br ? bridge->br : DEFAULT_BRIDGE_INTERFACE;
@@ -747,8 +747,8 @@ int net_init_tap(const Netdev *netdev, const char *name,
const char *vhostfdname;
char ifname[128];
- assert(netdev->opts->type == NET_CLIENT_OPTIONS_KIND_TAP);
- tap = netdev->opts->u.tap.data;
+ assert(netdev->type == NET_CLIENT_DRIVER_TAP);
+ tap = &netdev->u.tap;
queues = tap->has_queues ? tap->queues : 1;
vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;
@@ -911,7 +911,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
VHostNetState *tap_get_vhost_net(NetClientState *nc)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
return s->vhost_net;
}