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qapi: net: Add query-netdev command

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The query-netdev command is used to get the configuration of the current
network device backends (netdevs).
This is the QMP analog of the HMP command "info network" but only for
netdevs (i.e. excluding NIC and hubports).

The query-netdev command returns an array of objects of the NetdevInfo
type, which are an extension of Netdev type. It means that response can
be used for netdev-add after small modification. This can be useful for
recreate the same netdev configuration.

Information about the network device is filled in when it is created or
modified and is available through the NetClientState->stored_config.

Signed-off-by: Alexey Kirillov <lekiravi@yandex-team.ru>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Alexey Kirillov 2021-03-03 12:59:06 +03:00 • committed by Jason Wang
parent 3aa1b7af0f
commit d32ad10a14
12 changed files with 477 additions and 9 deletions
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9
net/tap-win32.c
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@ -768,6 +768,7 @@ static int tap_win32_init(NetClientState *peer, const char *model,
NetClientState *nc;
TAPState *s;
tap_win32_overlapped_t *handle;
NetdevTapOptions *stored;
if (tap_win32_open(&handle, ifname) < 0) {
printf("tap: Could not open '%s'\n", ifname);
@ -778,6 +779,14 @@ static int tap_win32_init(NetClientState *peer, const char *model,
s = DO_UPCAST(TAPState, nc, nc);
/* Store startup parameters */
nc->stored_config = g_new0(NetdevInfo, 1);
nc->stored_config->type = NET_BACKEND_TAP;
stored = &nc->stored_config->u.tap;
stored->has_ifname = true;
stored->ifname = g_strdup(ifname);
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"tap: ifname=%s", ifname);