gwj / at91sam9263 · Commits

Commit 436e5e53c97d8fb469306b18a0c31dc60f5e546c

Authored by aliguori
1 parent d6aa671f

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
Inline Side-by-side
Showing 3 changed files with 33 additions and 1 deletions
monitor.c
  View file @436e5e5
... ... @@ -1516,6 +1516,7 @@ static const term_cmd_t term_cmds[] = {
1516 1516 "value", "set maximum speed (in bytes) for migrations" },
1517 1517 { "balloon", "i", do_balloon,
1518 1518 "target", "request VM to change it's memory allocation (in MB)" },
  1519 + { "set_link", "ss", do_set_link, "name [up|down]" },
1519 1520 { NULL, NULL, },
1520 1521 };
1521 1522  
... ...
... ... @@ -387,12 +387,15 @@ void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
387 387 VLANState *vlan = vc1->vlan;
388 388 VLANClientState *vc;
389 389  
  390 + if (vc1->link_down)
  391 + return;
  392 +
390 393 #ifdef DEBUG_NET
391 394 printf("vlan %d send:\n", vlan->id);
392 395 hex_dump(stdout, buf, size);
393 396 #endif
394 397 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
395   - if (vc != vc1) {
  398 + if (vc != vc1 && !vc->link_down) {
396 399 vc->fd_read(vc->opaque, buf, size);
397 400 }
398 401 }
... ... @@ -1692,6 +1695,32 @@ void do_info_network(void)
1692 1695 }
1693 1696 }
1694 1697  
  1698 +int do_set_link(const char *name, const char *up_or_down)
  1699 +{
  1700 + VLANState *vlan;
  1701 + VLANClientState *vc = NULL;
  1702 +
  1703 + for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
  1704 + for (vc = vlan->first_client; vc != NULL; vc = vc->next)
  1705 + if (strcmp(vc->name, name) == 0)
  1706 + break;
  1707 +
  1708 + if (!vc) {
  1709 + term_printf("could not find network device '%s'", name);
  1710 + return 0;
  1711 + }
  1712 +
  1713 + if (strcmp(up_or_down, "up") == 0)
  1714 + vc->link_down = 0;
  1715 + else if (strcmp(up_or_down, "down") == 0)
  1716 + vc->link_down = 1;
  1717 + else
  1718 + term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
  1719 + up_or_down);
  1720 +
  1721 + return 1;
  1722 +}
  1723 +
1695 1724 void net_cleanup(void)
1696 1725 {
1697 1726 VLANState *vlan;
... ...
... ... @@ -15,6 +15,7 @@ struct VLANClientState {
15 15 /* Packets may still be sent if this returns zero. It's used to
16 16 rate-limit the slirp code. */
17 17 IOCanRWHandler *fd_can_read;
  18 + int link_down;
18 19 void *opaque;
19 20 struct VLANClientState *next;
20 21 struct VLANState *vlan;
... ... @@ -46,6 +47,7 @@ void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6]);
46 47 void qemu_handler_true(void *opaque);
47 48  
48 49 void do_info_network(void);
  50 +int do_set_link(const char *name, const char *up_or_down);
49 51  
50 52 /* NIC info */
51 53  
... ...