From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LKzlT-0007sP-Hu for qemu-devel@nongnu.org; Thu, 08 Jan 2009 13:37:55 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LKzlS-0007rm-2z for qemu-devel@nongnu.org; Thu, 08 Jan 2009 13:37:55 -0500 Received: from [199.232.76.173] (port=59067 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LKzlR-0007ri-SF for qemu-devel@nongnu.org; Thu, 08 Jan 2009 13:37:53 -0500 Received: from mail11.svc.cra.dublin.eircom.net ([159.134.118.27]:48404) by monty-python.gnu.org with smtp (Exim 4.60) (envelope-from ) id 1LKzlR-00063y-D0 for qemu-devel@nongnu.org; Thu, 08 Jan 2009 13:37:53 -0500 From: Mark McLoughlin Date: Thu, 8 Jan 2009 18:37:47 +0000 Message-Id: <1231439870-25692-1-git-send-email-markmc@redhat.com> In-Reply-To: <1231439854.25753.2.camel@localhost.localdomain> References: <1231439854.25753.2.camel@localhost.localdomain> 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 , 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 | 31 ++++++++++++++++++++++++++++++- net.h | 2 ++ 3 files changed, 33 insertions(+), 1 deletions(-) diff --git a/monitor.c b/monitor.c index 745c335..7ff9890 100644 --- a/monitor.c +++ b/monitor.c @@ -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, }, }; diff --git a/net.c b/net.c index 4609be2..eef0564 100644 --- a/net.c +++ b/net.c @@ -386,12 +386,15 @@ 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); } } @@ -1717,6 +1720,32 @@ 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; diff --git a/net.h b/net.h index 19ab649..3c0dab9 100644 --- a/net.h +++ b/net.h @@ -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; @@ -49,6 +50,7 @@ void qemu_check_nic_model_list(NICInfo *nd, const char * const *models, 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 */ -- 1.6.0.6