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Add de-association handling to macvlan code

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Add de-association handling for 802.1qbg (vepa) via lldpad
netlink messages. Also adds the possibility to perform an
association request without waiting for a confirmation.

Signed-off-by: D. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>
This commit is contained in:
D. Herrendoerfer 2012-02-22 14:17:14 +01:00 committed by Laine Stump
parent e3ba402581
commit 723d5c50c0
4 changed files with 383 additions and 15 deletions
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2
src/qemu/qemu_migration.c
View File

@ -2649,7 +2649,7 @@ qemuMigrationVPAssociatePortProfiles(virDomainDefPtr def) {
net->mac,
virDomainNetGetActualDirectDev(net),
def->uuid,
VIR_NETDEV_VPORT_PROFILE_OP_MIGRATE_IN_FINISH) < 0)
VIR_NETDEV_VPORT_PROFILE_OP_MIGRATE_IN_FINISH, false) < 0)
goto err_exit;
}
last_good_net = i;

360
src/util/virnetdevmacvlan.c
View File

@ -1,6 +1,6 @@
/*
* Copyright (C) 2010-2011 Red Hat, Inc.
* Copyright (C) 2010 IBM Corporation
* Copyright (C) 2010-2012 IBM Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -46,7 +46,6 @@ VIR_ENUM_IMPL(virNetDevMacVLanMode, VIR_NETDEV_MACVLAN_MODE_LAST,
"passthrough")
#if WITH_MACVTAP
# include <stdint.h>
# include <stdio.h>
# include <errno.h>
@ -68,6 +67,8 @@ VIR_ENUM_IMPL(virNetDevMacVLanMode, VIR_NETDEV_MACVLAN_MODE_LAST,
# include "virfile.h"
# include "virnetlink.h"
# include "virnetdev.h"
# include "virpidfile.h"
# define MACVTAP_NAME_PREFIX "macvtap"
# define MACVTAP_NAME_PATTERN "macvtap%d"
@ -445,6 +446,328 @@ static const uint32_t modeMap[VIR_NETDEV_MACVLAN_MODE_LAST] = {
[VIR_NETDEV_MACVLAN_MODE_PASSTHRU] = MACVLAN_MODE_PASSTHRU,
};
/* Struct to hold the state and configuration of a 802.1qbg port */
struct virNetlinkCallbackData {
char *cr_ifname;
virNetDevVPortProfilePtr virtPortProfile;
unsigned char *macaddress;
char *linkdev;
unsigned char *vmuuid;
enum virNetDevVPortProfileOp vmOp;
unsigned int linkState;
};
typedef struct virNetlinkCallbackData *virNetlinkCallbackDataPtr;
# define INSTANCE_STRLEN 36
static int instance2str(const unsigned char *p, char *dst, size_t size)
{
if (dst && size > INSTANCE_STRLEN) {
snprintf(dst, size, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x-%02x%02x%02x%02x%02x%02x",
p[0], p[1], p[2], p[3],
p[4], p[5], p[6], p[7],
p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
return 0;
}
return -1;
}
# define LLDPAD_PID_FILE "/var/run/lldpad.pid"
# define VIRIP_PID_FILE "/var/run/virip.pid"
/**
* virNetDevMacVLanVPortProfileCallback:
*
* @msg: The buffer containing the received netlink message
* @length: The length of the received netlink message.
* @peer: The netling sockaddr containing the peer information
* @handled: Contains information if the message has been replied to yet
* @opaque: Contains vital information regarding the associated vm an interface
*
* This function is called when a netlink message is received. The function
* reads the message and responds if it is pertinent to the running VMs
* network interface.
*/
static void
virNetDevMacVLanVPortProfileCallback(unsigned char *msg,
int length,
struct sockaddr_nl *peer,
bool *handled,
void *opaque)
{
struct nla_policy ifla_vf_policy[IFLA_VF_MAX + 1] = {
[IFLA_VF_MAC] = {.minlen = sizeof(struct ifla_vf_mac),
.maxlen = sizeof(struct ifla_vf_mac)},
[IFLA_VF_VLAN] = {.minlen = sizeof(struct ifla_vf_vlan),
.maxlen = sizeof(struct ifla_vf_vlan)},
};
struct nla_policy ifla_port_policy[IFLA_PORT_MAX + 1] = {
[IFLA_PORT_RESPONSE] = {.type = NLA_U16},
};
struct nlattr *tb[IFLA_MAX + 1], *tb3[IFLA_PORT_MAX + 1],
*tb_vfinfo[IFLA_VF_MAX + 1], *tb_vfinfo_list;
struct ifinfomsg ifinfo;
struct nlmsghdr *hdr;
void *data;
int rem;
char *ifname;
bool indicate = false;
virNetlinkCallbackDataPtr calld = opaque;
pid_t lldpad_pid = 0;
pid_t virip_pid = 0;
hdr = (struct nlmsghdr *) msg;
data = nlmsg_data(hdr);
/* Quickly decide if we want this or not */
if (virPidFileReadPath(LLDPAD_PID_FILE, &lldpad_pid) < 0)
return;
ignore_value(virPidFileReadPath(VIRIP_PID_FILE, &virip_pid));
if (hdr->nlmsg_pid != lldpad_pid && hdr->nlmsg_pid != virip_pid)
return; /* we only care for lldpad and virip messages */
if (hdr->nlmsg_type != RTM_SETLINK)
return; /* we only care for RTM_SETLINK */
if (*handled)
return; /* if it has been handled - dont handle again */
/* DEBUG start */
VIR_INFO("netlink message nl_sockaddr: %p len: %d", peer, length);
VIR_DEBUG("nlmsg_type = 0x%02x", hdr->nlmsg_type);
VIR_DEBUG("nlmsg_len = 0x%04x", hdr->nlmsg_len);
VIR_DEBUG("nlmsg_pid = %d", hdr->nlmsg_pid);
VIR_DEBUG("nlmsg_seq = 0x%08x", hdr->nlmsg_seq);
VIR_DEBUG("nlmsg_flags = 0x%04x", hdr->nlmsg_flags);
VIR_DEBUG("lldpad pid = %d", lldpad_pid);
switch (hdr->nlmsg_type) {
case RTM_NEWLINK:
case RTM_DELLINK:
case RTM_SETLINK:
case RTM_GETLINK:
VIR_DEBUG(" IFINFOMSG\n");
VIR_DEBUG(" ifi_family = 0x%02x\n",
((struct ifinfomsg *)data)->ifi_family);
VIR_DEBUG(" ifi_type = 0x%x\n",
((struct ifinfomsg *)data)->ifi_type);
VIR_DEBUG(" ifi_index = %i\n",
((struct ifinfomsg *)data)->ifi_index);
VIR_DEBUG(" ifi_flags = 0x%04x\n",
((struct ifinfomsg *)data)->ifi_flags);
VIR_DEBUG(" ifi_change = 0x%04x\n",
((struct ifinfomsg *)data)->ifi_change);
}
/* DEBUG end */
/* Parse netlink message assume a setlink with vfports */
memcpy(&ifinfo, NLMSG_DATA(hdr), sizeof ifinfo);
VIR_DEBUG("family:%#x type:%#x index:%d flags:%#x change:%#x",
ifinfo.ifi_family, ifinfo.ifi_type, ifinfo.ifi_index,
ifinfo.ifi_flags, ifinfo.ifi_change);
if (nlmsg_parse(hdr, sizeof ifinfo,
(struct nlattr **)&tb, IFLA_MAX, NULL)) {
VIR_DEBUG("error parsing request...");
return;
}
if (tb[IFLA_VFINFO_LIST]) {
VIR_DEBUG("FOUND IFLA_VFINFO_LIST!");
nla_for_each_nested(tb_vfinfo_list, tb[IFLA_VFINFO_LIST], rem) {
if (nla_type(tb_vfinfo_list) != IFLA_VF_INFO) {
VIR_DEBUG("nested parsing of"
"IFLA_VFINFO_LIST failed.");
return;
}
if (nla_parse_nested(tb_vfinfo, IFLA_VF_MAX,
tb_vfinfo_list, ifla_vf_policy)) {
VIR_DEBUG("nested parsing of "
"IFLA_VF_INFO failed.");
return;
}
}
if (tb_vfinfo[IFLA_VF_MAC]) {
struct ifla_vf_mac *mac = RTA_DATA(tb_vfinfo[IFLA_VF_MAC]);
unsigned char *m = mac->mac;
VIR_DEBUG("IFLA_VF_MAC = %2x:%2x:%2x:%2x:%2x:%2x",
m[0], m[1], m[2], m[3], m[4], m[5]);
if (memcmp(calld->macaddress, m, VIR_MAC_BUFLEN))
{
/* Repeat the same check for a broadcast mac */
int i;
for (i = 0;i < VIR_MAC_BUFLEN; i++) {
if (calld->macaddress[i] != 0xff) {
VIR_DEBUG("MAC address match failed (wasn't broadcast)");
return;
}
}
}
}
if (tb_vfinfo[IFLA_VF_VLAN]) {
struct ifla_vf_vlan *vlan = RTA_DATA(tb_vfinfo[IFLA_VF_VLAN]);
VIR_DEBUG("IFLA_VF_VLAN = %d", vlan->vlan);
}
}
if (tb[IFLA_IFNAME]) {
ifname = (char *)RTA_DATA(tb[IFLA_IFNAME]);
VIR_DEBUG("IFLA_IFNAME = %s\n", ifname);
}
if (tb[IFLA_OPERSTATE]) {
rem = *(unsigned short *)RTA_DATA(tb[IFLA_OPERSTATE]);
VIR_DEBUG("IFLA_OPERSTATE = %d\n", rem);
}
if (tb[IFLA_VF_PORTS]) {
struct nlattr *tb_vf_ports;
VIR_DEBUG("found IFLA_VF_PORTS\n");
nla_for_each_nested(tb_vf_ports, tb[IFLA_VF_PORTS], rem) {
VIR_DEBUG("iterating\n");
if (nla_type(tb_vf_ports) != IFLA_VF_PORT) {
VIR_DEBUG("not a IFLA_VF_PORT. skipping\n");
continue;
}
if (nla_parse_nested(tb3, IFLA_PORT_MAX, tb_vf_ports,
ifla_port_policy)) {
VIR_DEBUG("nested parsing on level 2"
" failed.");
}
if (tb3[IFLA_PORT_VF]) {
VIR_DEBUG("IFLA_PORT_VF = %d",
*(uint32_t *) (RTA_DATA(tb3[IFLA_PORT_VF])));
}
if (tb3[IFLA_PORT_PROFILE]) {
VIR_DEBUG("IFLA_PORT_PROFILE = %s",
(char *) RTA_DATA(tb3[IFLA_PORT_PROFILE]));
}
if (tb3[IFLA_PORT_VSI_TYPE]) {
struct ifla_port_vsi *pvsi;
int tid = 0;
pvsi = (struct ifla_port_vsi *)
RTA_DATA(tb3[IFLA_PORT_VSI_TYPE]);
tid = ((pvsi->vsi_type_id[2] << 16) |
(pvsi->vsi_type_id[1] << 8) |
pvsi->vsi_type_id[0]);
VIR_DEBUG("mgr_id: %d", pvsi->vsi_mgr_id);
VIR_DEBUG("type_id: %d", tid);
VIR_DEBUG("type_version: %d",
pvsi->vsi_type_version);
}
if (tb3[IFLA_PORT_INSTANCE_UUID]) {
char instance[INSTANCE_STRLEN + 2];
unsigned char *uuid;
uuid = (unsigned char *)
RTA_DATA(tb3[IFLA_PORT_INSTANCE_UUID]);
instance2str(uuid, instance, sizeof(instance));
VIR_DEBUG("IFLA_PORT_INSTANCE_UUID = %s\n",
instance);
}
if (tb3[IFLA_PORT_REQUEST]) {
uint8_t req = *(uint8_t *) RTA_DATA(tb3[IFLA_PORT_REQUEST]);
VIR_DEBUG("IFLA_PORT_REQUEST = %d", req);
if (req == PORT_REQUEST_DISASSOCIATE) {
VIR_DEBUG("Set dissaccociated.");
indicate = true;
}
}
if (tb3[IFLA_PORT_RESPONSE]) {
VIR_DEBUG("IFLA_PORT_RESPONSE = %d\n", *(uint16_t *)
RTA_DATA(tb3[IFLA_PORT_RESPONSE]));
}
}
}
if (!indicate) {
return;
}
VIR_INFO("Re-send 802.1qbg associate request:");
VIR_INFO(" if: %s", calld->cr_ifname);
VIR_INFO(" lf: %s", calld->linkdev);
VIR_INFO(" mac: %02x:%02x:%02x:%02x:%02x:%02x",
calld->macaddress[0], calld->macaddress[1],
calld->macaddress[2], calld->macaddress[3],
calld->macaddress[4], calld->macaddress[5]);
ignore_value(virNetDevVPortProfileAssociate(calld->cr_ifname,
calld->virtPortProfile,
calld->macaddress,
calld->linkdev,
calld->vmuuid,
calld->vmOp, true));
*handled = true;
return;
}
/**
* virNetlinkCallbackDataFree
*
* @calld: pointer to a virNetlinkCallbackData object to free
*
* This function frees all the data associated with a virNetlinkCallbackData object
* as well as the object itself. If called with NULL, it does nothing.
*
* Returns nothing.
*/
static void
virNetlinkCallbackDataFree(virNetlinkCallbackDataPtr calld)
{
if (calld) {
VIR_FREE(calld->cr_ifname);
VIR_FREE(calld->virtPortProfile);
VIR_FREE(calld->macaddress);
VIR_FREE(calld->linkdev);
VIR_FREE(calld->vmuuid);
}
VIR_FREE(calld);
}
/**
* virNetDevMacVLanVPortProfileDestroyCallback:
*
* @watch: watch whose handle to remove
* @macaddr: macaddr whose handle to remove
* @opaque: Contains vital information regarding the associated vm
*
* This function is called when a netlink message handler is terminated.
* The function frees locally allocated data referenced in the opaque
* data, and the opaque object itself.
*/
static void
virNetDevMacVLanVPortProfileDestroyCallback(int watch ATTRIBUTE_UNUSED,
const unsigned char *macaddr ATTRIBUTE_UNUSED,
void *opaque)
{
virNetlinkCallbackDataFree((virNetlinkCallbackDataPtr)opaque);
}
/**
* virNetDevMacVLanCreateWithVPortProfile:
* Create an instance of a macvtap device and open its tap character
@ -485,6 +808,7 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
int retries, do_retry = 0;
uint32_t macvtapMode;
const char *cr_ifname;
virNetlinkCallbackDataPtr calld = NULL;
int ret;
macvtapMode = modeMap[mode];
@ -547,7 +871,7 @@ create_name:
virtPortProfile,
macaddress,
linkdev,
vmuuid, vmOp) < 0) {
vmuuid, vmOp, false) < 0) {
rc = -1;
goto link_del_exit;
}
@ -589,9 +913,36 @@ create_name:
goto disassociate_exit;
}
if (virNetlinkEventServiceIsRunning()) {
if (VIR_ALLOC(calld) < 0)
goto memory_error;
if ((calld->cr_ifname = strdup(cr_ifname)) == NULL)
goto memory_error;
if (VIR_ALLOC(calld->virtPortProfile) < 0)
goto memory_error;
memcpy(calld->virtPortProfile, virtPortProfile, sizeof(*virtPortProfile));
if (VIR_ALLOC_N(calld->macaddress, VIR_MAC_BUFLEN) < 0)
goto memory_error;
memcpy(calld->macaddress, macaddress, VIR_MAC_BUFLEN);
if ((calld->linkdev = strdup(linkdev)) == NULL)
goto memory_error;
if (VIR_ALLOC_N(calld->vmuuid, VIR_UUID_BUFLEN) < 0)
goto memory_error;
memcpy(calld->vmuuid, vmuuid, VIR_UUID_BUFLEN);
calld->vmOp = vmOp;
virNetlinkEventAddClient(virNetDevMacVLanVPortProfileCallback,
virNetDevMacVLanVPortProfileDestroyCallback,
calld, macaddress);
}
return rc;
memory_error:
virReportOOMError();
virNetlinkCallbackDataFree(calld);
disassociate_exit:
ignore_value(virNetDevVPortProfileDisassociate(cr_ifname,
virtPortProfile,
@ -638,6 +989,9 @@ int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname,
if (virNetDevMacVLanDelete(ifname) < 0)
ret = -1;
}
virNetlinkEventRemoveClient(0, macaddr);
return ret;
}

33
src/util/virnetdevvportprofile.c
View File

@ -650,7 +650,8 @@ virNetDevVPortProfileOpCommon(const char *ifname, int ifindex,
const unsigned char *instanceId,
const unsigned char *hostUUID,
int32_t vf,
uint8_t op)
uint8_t op,
bool setlink_only)
{
int rc;
unsigned char *recvbuf = NULL;
@ -675,6 +676,9 @@ virNetDevVPortProfileOpCommon(const char *ifname, int ifindex,
return rc;
}
if (setlink_only) /*for re-associations on existing links*/
return 0;
while (--repeats >= 0) {
rc = virNetDevVPortProfileLinkDump(NULL, ifindex, nltarget_kernel, tb,
&recvbuf, virNetDevVPortProfileGetLldpadPid);
@ -751,7 +755,8 @@ static int
virNetDevVPortProfileOp8021Qbg(const char *ifname,
const unsigned char *macaddr,
const virNetDevVPortProfilePtr virtPort,
enum virNetDevVPortProfileLinkOp virtPortOp)
enum virNetDevVPortProfileLinkOp virtPortOp,
bool setlink_only)
{
int rc = 0;
int op = PORT_REQUEST_ASSOCIATE;
@ -804,7 +809,8 @@ virNetDevVPortProfileOp8021Qbg(const char *ifname,
virtPort->u.virtPort8021Qbg.instanceID,
NULL,
vf,
op);
op,
setlink_only);
err_exit:
@ -892,7 +898,8 @@ virNetDevVPortProfileOp8021Qbh(const char *ifname,
(virtPortOp ==
VIR_NETDEV_VPORT_PROFILE_LINK_OP_PREASSOCIATE_RR) ?
PORT_REQUEST_PREASSOCIATE_RR
: PORT_REQUEST_ASSOCIATE);
: PORT_REQUEST_ASSOCIATE,
false);
if (rc == -2)
/* Association timed out, disassociate */
virNetDevVPortProfileOpCommon(NULL, ifindex,
@ -904,7 +911,8 @@ virNetDevVPortProfileOp8021Qbh(const char *ifname,
NULL,
NULL,
vf,
PORT_REQUEST_DISASSOCIATE);
PORT_REQUEST_DISASSOCIATE,
false);
break;
case VIR_NETDEV_VPORT_PROFILE_LINK_OP_DISASSOCIATE:
@ -917,7 +925,8 @@ virNetDevVPortProfileOp8021Qbh(const char *ifname,
NULL,
NULL,
vf,
PORT_REQUEST_DISASSOCIATE);
PORT_REQUEST_DISASSOCIATE,
false);
break;
default:
@ -938,6 +947,7 @@ err_exit:
* @virtPort: pointer to the object holding port profile parameters
* @vmuuid : the UUID of the virtual machine
* @vmOp : The VM operation (i.e., create, no-op)
* @setlink_only : Only set the link - dont wait for the link to come up
*
* Associate a port on a swtich with a profile. This function
* may notify a kernel driver or an external daemon to run
@ -954,7 +964,8 @@ virNetDevVPortProfileAssociate(const char *macvtap_ifname,
const unsigned char *macvtap_macaddr,
const char *linkdev,
const unsigned char *vmuuid,
enum virNetDevVPortProfileOp vmOp)
enum virNetDevVPortProfileOp vmOp,
bool setlink_only)
{
int rc = 0;
@ -977,7 +988,8 @@ virNetDevVPortProfileAssociate(const char *macvtap_ifname,
virtPort,
(vmOp == VIR_NETDEV_VPORT_PROFILE_OP_MIGRATE_IN_START)
? VIR_NETDEV_VPORT_PROFILE_LINK_OP_PREASSOCIATE
: VIR_NETDEV_VPORT_PROFILE_LINK_OP_ASSOCIATE);
: VIR_NETDEV_VPORT_PROFILE_LINK_OP_ASSOCIATE,
setlink_only);
break;
case VIR_NETDEV_VPORT_PROFILE_8021QBH:
@ -1035,7 +1047,7 @@ virNetDevVPortProfileDisassociate(const char *macvtap_ifname,
case VIR_NETDEV_VPORT_PROFILE_8021QBG:
rc = virNetDevVPortProfileOp8021Qbg(macvtap_ifname, macvtap_macaddr,
virtPort,
VIR_NETDEV_VPORT_PROFILE_LINK_OP_DISASSOCIATE);
VIR_NETDEV_VPORT_PROFILE_LINK_OP_DISASSOCIATE, false);
break;
case VIR_NETDEV_VPORT_PROFILE_8021QBH:
@ -1058,7 +1070,8 @@ int virNetDevVPortProfileAssociate(const char *macvtap_ifname ATTRIBUTE_UNUSED,
const unsigned char *macvtap_macaddr ATTRIBUTE_UNUSED,
const char *linkdev ATTRIBUTE_UNUSED,
const unsigned char *vmuuid ATTRIBUTE_UNUSED,
enum virNetDevVPortProfileOp vmOp ATTRIBUTE_UNUSED)
enum virNetDevVPortProfileOp vmOp ATTRIBUTE_UNUSED,
bool setlink_only)
{
virReportSystemError(ENOSYS, "%s",
_("Virtual port profile association not supported on this platform"));

3
src/util/virnetdevvportprofile.h
View File

@ -86,7 +86,8 @@ int virNetDevVPortProfileAssociate(const char *ifname,
const unsigned char *macaddr,
const char *linkdev,
const unsigned char *vmuuid,
enum virNetDevVPortProfileOp vmOp)
enum virNetDevVPortProfileOp vmOp,
bool setlink_only)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
ATTRIBUTE_NONNULL(5) ATTRIBUTE_RETURN_CHECK;