[Qemu-devel] [PATCH RFC v4 02/29] net: use Netdev instead of NetClientOptions in client init

[Eric Blake <eblake@redhat.com>]

From: Kővágó, Zoltán <dirty.ice.hu@gmail.com>

This way we no longer need NetClientOptions and can convert Netdev
into a flat union.

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <93ffdfed7054529635e6acb935150d95dc173a12.1441627176.git.DirtY.iCE.hu@gmail.com>

[rework net_client_init1() to pass Netdev by copying from NetdevLegacy,
rather than merging the two types.]
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 net/clients.h    | 20 ++++++++++----------
 net/dump.c       |  6 +++---
 net/hub.c        |  6 +++---
 net/l2tpv3.c     |  6 +++---
 net/net.c        | 18 +++++++++++-------
 net/netmap.c     |  4 ++--
 net/slirp.c      |  6 +++---
 net/socket.c     |  6 +++---
 net/tap-win32.c  |  6 +++---
 net/tap.c        | 12 ++++++------
 net/vde.c        |  6 +++---
 net/vhost-user.c |  6 +++---
 12 files changed, 53 insertions(+), 49 deletions(-)

diff --git a/net/clients.h b/net/clients.h
index d47530e..5cae479 100644
--- a/net/clients.h
+++ b/net/clients.h
@@ -27,39 +27,39 @@
 #include "net/net.h"
 #include "qapi-types.h"

-int net_init_dump(const NetClientOptions *opts, const char *name,
+int net_init_dump(const Netdev *netdev, const char *name,
                   NetClientState *peer, Error **errp);

 #ifdef CONFIG_SLIRP
-int net_init_slirp(const NetClientOptions *opts, const char *name,
+int net_init_slirp(const Netdev *netdev, const char *name,
                    NetClientState *peer, Error **errp);
 #endif

-int net_init_hubport(const NetClientOptions *opts, const char *name,
+int net_init_hubport(const Netdev *netdev, const char *name,
                      NetClientState *peer, Error **errp);

-int net_init_socket(const NetClientOptions *opts, const char *name,
+int net_init_socket(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp);

-int net_init_tap(const NetClientOptions *opts, const char *name,
+int net_init_tap(const Netdev *netdev, const char *name,
                  NetClientState *peer, Error **errp);

-int net_init_bridge(const NetClientOptions *opts, const char *name,
+int net_init_bridge(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp);

-int net_init_l2tpv3(const NetClientOptions *opts, const char *name,
+int net_init_l2tpv3(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp);
 #ifdef CONFIG_VDE
-int net_init_vde(const NetClientOptions *opts, const char *name,
+int net_init_vde(const Netdev *netdev, const char *name,
                  NetClientState *peer, Error **errp);
 #endif

 #ifdef CONFIG_NETMAP
-int net_init_netmap(const NetClientOptions *opts, const char *name,
+int net_init_netmap(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp);
 #endif

-int net_init_vhost_user(const NetClientOptions *opts, const char *name,
+int net_init_vhost_user(const Netdev *netdev, const char *name,
                         NetClientState *peer, Error **errp);

 #endif /* QEMU_NET_CLIENTS_H */
diff --git a/net/dump.c b/net/dump.c
index 02c8064..d80fa94 100644
--- a/net/dump.c
+++ b/net/dump.c
@@ -146,7 +146,7 @@ static int net_dump_init(NetClientState *peer, const char *device,
     return 0;
 }

-int net_init_dump(const NetClientOptions *opts, const char *name,
+int net_init_dump(const Netdev *netdev, const char *name,
                   NetClientState *peer, Error **errp)
 {
     int len;
@@ -154,8 +154,8 @@ int net_init_dump(const NetClientOptions *opts, const char *name,
     char def_file[128];
     const NetdevDumpOptions *dump;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP);
-    dump = opts->dump;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP);
+    dump = netdev->opts->dump;

     assert(peer);

diff --git a/net/hub.c b/net/hub.c
index 3047f12..29f65b2 100644
--- a/net/hub.c
+++ b/net/hub.c
@@ -280,14 +280,14 @@ int net_hub_id_for_client(NetClientState *nc, int *id)
     return 0;
 }

-int net_init_hubport(const NetClientOptions *opts, const char *name,
+int net_init_hubport(const Netdev *netdev, const char *name,
                      NetClientState *peer, Error **errp)
 {
     const NetdevHubPortOptions *hubport;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT);
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT);
     assert(!peer);
-    hubport = opts->hubport;
+    hubport = netdev->opts->hubport;

     net_hub_add_port(hubport->hubid, name);
     return 0;
diff --git a/net/l2tpv3.c b/net/l2tpv3.c
index 4f9bcee..d2f8431 100644
--- a/net/l2tpv3.c
+++ b/net/l2tpv3.c
@@ -524,7 +524,7 @@ static NetClientInfo net_l2tpv3_info = {
     .cleanup = net_l2tpv3_cleanup,
 };

-int net_init_l2tpv3(const NetClientOptions *opts,
+int net_init_l2tpv3(const Netdev *netdev,
                     const char *name,
                     NetClientState *peer, Error **errp)
 {
@@ -545,8 +545,8 @@ int net_init_l2tpv3(const NetClientOptions *opts,
     s->queue_tail = 0;
     s->header_mismatch = false;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_L2TPV3);
-    l2tpv3 = opts->l2tpv3;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_L2TPV3);
+    l2tpv3 = netdev->opts->l2tpv3;

     if (l2tpv3->has_ipv6 && l2tpv3->ipv6) {
         s->ipv6 = l2tpv3->ipv6;
diff --git a/net/net.c b/net/net.c
index 28a5597..4d99b48 100644
--- a/net/net.c
+++ b/net/net.c
@@ -813,15 +813,15 @@ int qemu_find_nic_model(NICInfo *nd, const char * const *models,
     return -1;
 }

-static int net_init_nic(const NetClientOptions *opts, const char *name,
+static int net_init_nic(const Netdev *netdev, const char *name,
                         NetClientState *peer, Error **errp)
 {
     int idx;
     NICInfo *nd;
     const NetLegacyNicOptions *nic;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
-    nic = opts->nic;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
+    nic = netdev->opts->nic;

     idx = nic_get_free_idx();
     if (idx == -1 || nb_nics >= MAX_NICS) {
@@ -882,7 +882,7 @@ static int net_init_nic(const NetClientOptions *opts, const char *name,


 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
-    const NetClientOptions *opts,
+    const Netdev *netdev,
     const char *name,
     NetClientState *peer, Error **errp) = {
         [NET_CLIENT_OPTIONS_KIND_NIC]       = net_init_nic,
@@ -914,11 +914,13 @@ static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
 static int net_client_init1(const void *object, int is_netdev, Error **errp)
 {
     const NetClientOptions *opts;
+    Netdev legacy = {0};
+    const Netdev *netdev;
     const char *name;
     NetClientState *peer = NULL;

     if (is_netdev) {
-        const Netdev *netdev = object;
+        netdev = object;
         opts = netdev->opts;
         name = netdev->id;

@@ -931,7 +933,9 @@ static int net_client_init1(const void *object, int is_netdev, Error **errp)
         }
     } else {
         const NetLegacy *net = object;
-        opts = net->opts;
+        legacy.id = net->id;
+        opts = legacy.opts = net->opts;
+        netdev = &legacy;
         /* missing optional values have been initialized to "all bits zero" */
         name = net->has_id ? net->id : net->name;

@@ -958,7 +962,7 @@ static int net_client_init1(const void *object, int is_netdev, Error **errp)
         }
     }

-    if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) {
+    if (net_client_init_fun[opts->kind](netdev, name, peer, errp) < 0) {
         /* FIXME drop when all init functions store an Error */
         if (errp && !*errp) {
             error_setg(errp, QERR_DEVICE_INIT_FAILED,
diff --git a/net/netmap.c b/net/netmap.c
index 508b829..a464618 100644
--- a/net/netmap.c
+++ b/net/netmap.c
@@ -435,11 +435,11 @@ static NetClientInfo net_netmap_info = {
  *
  * ... -net netmap,ifname="..."
  */
-int net_init_netmap(const NetClientOptions *opts,
+int net_init_netmap(const Netdev *netdev,
                     const char *name, NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
-    const NetdevNetmapOptions *netmap_opts = opts->netmap;
+    const NetdevNetmapOptions *netmap_opts = netdev->opts->netmap;
     NetClientState *nc;
     NetmapPriv me;
     NetmapState *s;
diff --git a/net/slirp.c b/net/slirp.c
index 7657b38..0fc2c52 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -736,7 +736,7 @@ static const char **slirp_dnssearch(const StringList *dnsname)
     return ret;
 }

-int net_init_slirp(const NetClientOptions *opts, const char *name,
+int net_init_slirp(const Netdev *netdev, const char *name,
                    NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
@@ -746,8 +746,8 @@ int net_init_slirp(const NetClientOptions *opts, const char *name,
     const NetdevUserOptions *user;
     const char **dnssearch;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_USER);
-    user = opts->user;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_USER);
+    user = netdev->opts->user;

     vnet = user->has_net ? g_strdup(user->net) :
            user->has_ip  ? g_strdup_printf("%s/24", user->ip) :
diff --git a/net/socket.c b/net/socket.c
index b1e3b1c..75f693c 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -699,15 +699,15 @@ static int net_socket_udp_init(NetClientState *peer,
     return 0;
 }

-int net_init_socket(const NetClientOptions *opts, const char *name,
+int net_init_socket(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
     Error *err = NULL;
     const NetdevSocketOptions *sock;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_SOCKET);
-    sock = opts->socket;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_SOCKET);
+    sock = netdev->opts->socket;

     if (sock->has_fd + sock->has_listen + sock->has_connect + sock->has_mcast +
         sock->has_udp != 1) {
diff --git a/net/tap-win32.c b/net/tap-win32.c
index 625d53c..acce480 100644
--- a/net/tap-win32.c
+++ b/net/tap-win32.c
@@ -761,14 +761,14 @@ static int tap_win32_init(NetClientState *peer, const char *model,
     return 0;
 }

-int net_init_tap(const NetClientOptions *opts, const char *name,
+int net_init_tap(const Netdev *netdev, const char *name,
                  NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
     const NetdevTapOptions *tap;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
-    tap = opts->tap;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
+    tap = netdev->opts->tap;

     if (!tap->has_ifname) {
         error_report("tap: no interface name");
diff --git a/net/tap.c b/net/tap.c
index bd01590..263f807 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -557,7 +557,7 @@ static int net_bridge_run_helper(const char *helper, const char *bridge,
     }
 }

-int net_init_bridge(const NetClientOptions *opts, const char *name,
+int net_init_bridge(const Netdev *netdev, const char *name,
                     NetClientState *peer, Error **errp)
 {
     const NetdevBridgeOptions *bridge;
@@ -565,8 +565,8 @@ int net_init_bridge(const NetClientOptions *opts, const char *name,
     TAPState *s;
     int fd, vnet_hdr;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_BRIDGE);
-    bridge = opts->bridge;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_BRIDGE);
+    bridge = netdev->opts->bridge;

     helper = bridge->has_helper ? bridge->helper : DEFAULT_BRIDGE_HELPER;
     br     = bridge->has_br     ? bridge->br     : DEFAULT_BRIDGE_INTERFACE;
@@ -716,7 +716,7 @@ static int get_fds(char *str, char *fds[], int max)
     return i;
 }

-int net_init_tap(const NetClientOptions *opts, const char *name,
+int net_init_tap(const Netdev *netdev, const char *name,
                  NetClientState *peer, Error **errp)
 {
     const NetdevTapOptions *tap;
@@ -728,8 +728,8 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
     const char *vhostfdname;
     char ifname[128];

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
-    tap = opts->tap;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
+    tap = netdev->opts->tap;
     queues = tap->has_queues ? tap->queues : 1;
     vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;

diff --git a/net/vde.c b/net/vde.c
index dacaa64..0ac2525 100644
--- a/net/vde.c
+++ b/net/vde.c
@@ -109,14 +109,14 @@ static int net_vde_init(NetClientState *peer, const char *model,
     return 0;
 }

-int net_init_vde(const NetClientOptions *opts, const char *name,
+int net_init_vde(const Netdev *netdev, const char *name,
                  NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
     const NetdevVdeOptions *vde;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VDE);
-    vde = opts->vde;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_VDE);
+    vde = netdev->opts->vde;

     /* missing optional values have been initialized to "all bits zero" */
     if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
diff --git a/net/vhost-user.c b/net/vhost-user.c
index 93dcecd..20981a9 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -223,14 +223,14 @@ static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
     return 0;
 }

-int net_init_vhost_user(const NetClientOptions *opts, const char *name,
+int net_init_vhost_user(const Netdev *netdev, const char *name,
                         NetClientState *peer, Error **errp)
 {
     const NetdevVhostUserOptions *vhost_user_opts;
     CharDriverState *chr;

-    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
-    vhost_user_opts = opts->vhost_user;
+    assert(netdev->opts->kind == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+    vhost_user_opts = netdev->opts->vhost_user;

     chr = net_vhost_parse_chardev(vhost_user_opts, errp);
     if (!chr) {
-- 
2.4.3