[libvirt] [PATCH v2 6/7] virNetDevMacVLanCreateWithVPortProfile: Rework to support multiple FDs
Michal Privoznik
mprivozn at redhat.com
Thu Dec 10 07:38:10 UTC 2015
For the multiqueue on macvtaps we are going to need to open
the device multiple times. Currently, this is not supported.
Rework the function, so that upper layers can be reworked too.
Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
src/lxc/lxc_process.c | 1 +
src/qemu/qemu_command.c | 21 ++++++++++++---------
src/util/virnetdevmacvlan.c | 20 +++++++++++++++-----
src/util/virnetdevmacvlan.h | 4 +++-
4 files changed, 31 insertions(+), 15 deletions(-)
diff --git a/src/lxc/lxc_process.c b/src/lxc/lxc_process.c
index 0ada6e4..f7e2b81 100644
--- a/src/lxc/lxc_process.c
+++ b/src/lxc/lxc_process.c
@@ -349,6 +349,7 @@ char *virLXCProcessSetupInterfaceDirect(virConnectPtr conn,
&res_ifname,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
cfg->stateDir,
+ NULL, 0,
macvlan_create_flags) < 0)
goto cleanup;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index b1febed..d856377 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -230,15 +230,18 @@ qemuPhysIfaceConnect(virDomainDefPtr def,
if (net->model && STREQ(net->model, "virtio"))
macvlan_create_flags |= VIR_NETDEV_MACVLAN_VNET_HDR;
- rc = virNetDevMacVLanCreateWithVPortProfile(
- net->ifname, &net->mac,
- virDomainNetGetActualDirectDev(net),
- virDomainNetGetActualDirectMode(net),
- def->uuid,
- virDomainNetGetActualVirtPortProfile(net),
- &res_ifname,
- vmop, cfg->stateDir,
- macvlan_create_flags);
+ if (virNetDevMacVLanCreateWithVPortProfile(net->ifname,
+ &net->mac,
+ virDomainNetGetActualDirectDev(net),
+ virDomainNetGetActualDirectMode(net),
+ def->uuid,
+ virDomainNetGetActualVirtPortProfile(net),
+ &res_ifname,
+ vmop, cfg->stateDir,
+ &rc, 1,
+ macvlan_create_flags) < 0)
+ return -1;
+
if (rc >= 0) {
virDomainAuditNetDevice(def, net, res_ifname, true);
VIR_FREE(net->ifname);
diff --git a/src/util/virnetdevmacvlan.c b/src/util/virnetdevmacvlan.c
index 76fd542..e62cbda 100644
--- a/src/util/virnetdevmacvlan.c
+++ b/src/util/virnetdevmacvlan.c
@@ -727,11 +727,15 @@ virNetDevMacVLanVPortProfileRegisterCallback(const char *ifname,
* @res_ifname: Pointer to a string pointer where the actual name of the
* interface will be stored into if everything succeeded. It is up
* to the caller to free the string.
+ * @tapfd: array of file descriptor return value for the new tap device
+ * @tapfdSize: number of file descriptors in @tapfd
* @flags: OR of virNetDevMacVLanCreateFlags.
*
- * Returns file descriptor of the tap device in case of success with
- * @flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP, otherwise returns 0; returns
- * -1 on error.
+ * Creates a macvlan device. Optionally, if flags &
+ * VIR_NETDEV_MACVLAN_CREATE_WITH_TAP is set, @tapfd is populated with FDs of
+ * tap devices up to @tapfdSize.
+ *
+ * Return 0 on success, -1 on error.
*/
int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
const virMacAddr *macaddress,
@@ -742,6 +746,8 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
char **res_ifname,
virNetDevVPortProfileOp vmOp,
char *stateDir,
+ int *tapfd,
+ size_t tapfdSize,
unsigned int flags)
{
const char *type = (flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP) ?
@@ -853,10 +859,10 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
}
if (flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP) {
- if (virNetDevMacVLanTapOpen(cr_ifname, &rc, 1, 10) < 0)
+ if (virNetDevMacVLanTapOpen(cr_ifname, tapfd, tapfdSize, 10) < 0)
goto disassociate_exit;
- if (virNetDevMacVLanTapSetup(&rc, 1, vnet_hdr, false) < 0) {
+ if (virNetDevMacVLanTapSetup(tapfd, tapfdSize, vnet_hdr, tapfdSize > 0) < 0) {
VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
goto disassociate_exit;
}
@@ -892,6 +898,8 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
linkdev,
vf,
vmOp));
+ while (tapfdSize--)
+ VIR_FORCE_CLOSE(tapfd[tapfdSize]);
link_del_exit:
ignore_value(virNetDevMacVLanDelete(cr_ifname));
@@ -1016,6 +1024,8 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *ifname ATTRIBUTE_UNUSED,
char **res_ifname ATTRIBUTE_UNUSED,
virNetDevVPortProfileOp vmop ATTRIBUTE_UNUSED,
char *stateDir ATTRIBUTE_UNUSED,
+ int *tapfd ATTRIBUTE_UNUSED,
+ size_t tapfdSize ATTRIBUTE_UNUSED,
unsigned int unused_flags ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
diff --git a/src/util/virnetdevmacvlan.h b/src/util/virnetdevmacvlan.h
index 0613f4d..2844a44 100644
--- a/src/util/virnetdevmacvlan.h
+++ b/src/util/virnetdevmacvlan.h
@@ -71,9 +71,11 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *ifname,
char **res_ifname,
virNetDevVPortProfileOp vmop,
char *stateDir,
+ int *tapfd,
+ size_t tapfdSize,
unsigned int flags)
ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(6)
- ATTRIBUTE_NONNULL(8) ATTRIBUTE_NONNULL(10) ATTRIBUTE_RETURN_CHECK;
+ ATTRIBUTE_NONNULL(8) ATTRIBUTE_NONNULL(12) ATTRIBUTE_RETURN_CHECK;
int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname,
const virMacAddr *macaddress,
--
2.4.10
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