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Add 'set_link' monitor command (Mark McLoughlin) 

Add a monitor command to setting a given network device's link status
to 'up' or 'down'.

Allows simulation of network cable disconnect.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6247 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-01-08 19:44:06 +00:00
parent d6aa671f18
commit 436e5e53c9
3 changed files with 33 additions and 1 deletions
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1
monitor.c
View File

@ -1516,6 +1516,7 @@ static const term_cmd_t term_cmds[] = {
"value", "set maximum speed (in bytes) for migrations" },
{ "balloon", "i", do_balloon,
"target", "request VM to change it's memory allocation (in MB)" },
{ "set_link", "ss", do_set_link, "name [up|down]" },
{ NULL, NULL, },
};

31
net.c
View File

@ -387,12 +387,15 @@ void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
VLANState *vlan = vc1->vlan;
VLANClientState *vc;
if (vc1->link_down)
return;
#ifdef DEBUG_NET
printf("vlan %d send:\n", vlan->id);
hex_dump(stdout, buf, size);
#endif
for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
if (vc != vc1) {
if (vc != vc1 && !vc->link_down) {
vc->fd_read(vc->opaque, buf, size);
}
}
@ -1692,6 +1695,32 @@ void do_info_network(void)
}
}
int do_set_link(const char *name, const char *up_or_down)
{
VLANState *vlan;
VLANClientState *vc = NULL;
for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
for (vc = vlan->first_client; vc != NULL; vc = vc->next)
if (strcmp(vc->name, name) == 0)
break;
if (!vc) {
term_printf("could not find network device '%s'", name);
return 0;
}
if (strcmp(up_or_down, "up") == 0)
vc->link_down = 0;
else if (strcmp(up_or_down, "down") == 0)
vc->link_down = 1;
else
term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
up_or_down);
return 1;
}
void net_cleanup(void)
{
VLANState *vlan;

2
net.h
View File

@ -15,6 +15,7 @@ struct VLANClientState {
/* Packets may still be sent if this returns zero. It's used to
rate-limit the slirp code. */
IOCanRWHandler *fd_can_read;
int link_down;
void *opaque;
struct VLANClientState *next;
struct VLANState *vlan;
@ -46,6 +47,7 @@ void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6]);
void qemu_handler_true(void *opaque);
void do_info_network(void);
int do_set_link(const char *name, const char *up_or_down);
/* NIC info */