From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LA0H8-0008MV-Rf for qemu-devel@nongnu.org; Tue, 09 Dec 2008 05:57:10 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LA0H7-0008LX-2J for qemu-devel@nongnu.org; Tue, 09 Dec 2008 05:57:09 -0500 Received: from [199.232.76.173] (port=39192 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LA0H6-0008LU-Pb for qemu-devel@nongnu.org; Tue, 09 Dec 2008 05:57:08 -0500 Received: from mail23.svc.cra.dublin.eircom.net ([159.134.118.145]:31206) by monty-python.gnu.org with smtp (Exim 4.60) (envelope-from ) id 1LA0H6-0006JD-CG for qemu-devel@nongnu.org; Tue, 09 Dec 2008 05:57:08 -0500 From: Mark McLoughlin Date: Tue, 9 Dec 2008 10:55:40 +0000 Message-Id: <1228820143-23580-2-git-send-email-markmc@redhat.com> In-Reply-To: <1228820143-23580-1-git-send-email-markmc@redhat.com> References: <> <1228820143-23580-1-git-send-email-markmc@redhat.com> Subject: [Qemu-devel] [PATCH 1/4] Add 'set_link' monitor command Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Mark McLoughlin , Rusty Russell , qemu-devel@nongnu.org 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 --- monitor.c | 1 + net.c | 41 ++++++++++++++++++++++++++++++++++++++++- net.h | 2 ++ 3 files changed, 43 insertions(+), 1 deletions(-) diff --git a/monitor.c b/monitor.c index f142a87..ac74711 100644 --- a/monitor.c +++ b/monitor.c @@ -1497,6 +1497,7 @@ 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", "iis", do_set_link, "vlan_id dev_idx [up|down]" }, { NULL, NULL, }, }; diff --git a/net.c b/net.c index cbf1cdf..250519c 100644 --- a/net.c +++ b/net.c @@ -358,12 +358,15 @@ 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); } } @@ -1560,6 +1563,42 @@ void do_info_network(void) } } +int do_set_link(int vlan_id, int device_idx, const char *up_or_down) +{ + VLANState *vlan; + VLANClientState *vc; + int i = 0; + + for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) + if (vlan->id == vlan_id) + break; + + if (!vlan) { + term_printf("could not find vlan '%d'\n", vlan_id); + return 0; + } + + for(vc = vlan->first_client; vc != NULL; vc = vc->next) + if (i++ == device_idx) + break; + + if (!vc) { + term_printf("could not find device '%d' on vlan '%d'\n", + device_idx, vlan_id); + 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; diff --git a/net.h b/net.h index a2b01ae..e7cd062 100644 --- a/net.h +++ b/net.h @@ -10,6 +10,7 @@ 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; @@ -34,6 +35,7 @@ void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size); void qemu_handler_true(void *opaque); void do_info_network(void); +int do_set_link(int vlan_id, int device_idx, const char *up_or_down); /* NIC info */ -- 1.5.4.3