[libvirt] [PATCH 20/23] qemu-command: use -net socket, fd= with slirp-helper
marcandre.lureau at redhat.com
marcandre.lureau at redhat.com
Mon Jul 8 07:07:44 UTC 2019
From: Marc-André Lureau <marcandre.lureau at redhat.com>
If a slirp-helper is associated with a network interface (after
probing & preparing succesfully), pass the socket fd to QEMU and use
"-net socket,fd=".
Signed-off-by: Marc-André Lureau <marcandre.lureau at redhat.com>
---
src/qemu/qemu_command.c | 35 +++++++++++++++++++++++++++++------
src/qemu/qemu_command.h | 3 ++-
src/qemu/qemu_hotplug.c | 4 +++-
3 files changed, 34 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 040e8e2b12..e15d19eb25 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -28,6 +28,7 @@
#include "qemu_interface.h"
#include "qemu_alias.h"
#include "qemu_security.h"
+#include "qemu_slirp.h"
#include "qemu_block.h"
#include "cpu/cpu.h"
#include "dirname.h"
@@ -4038,7 +4039,8 @@ qemuBuildHostNetStr(virDomainNetDefPtr net,
char **tapfd,
size_t tapfdSize,
char **vhostfd,
- size_t vhostfdSize)
+ size_t vhostfdSize,
+ const char *slirpfd)
{
bool is_tap = false;
virBuffer buf = VIR_BUFFER_INITIALIZER;
@@ -4109,6 +4111,12 @@ qemuBuildHostNetStr(virDomainNetDefPtr net,
break;
case VIR_DOMAIN_NET_TYPE_USER:
+ if (slirpfd) {
+ virBufferAsprintf(&buf, "socket,fd=%s,",
+ slirpfd);
+ break;
+ }
+
virBufferAddLit(&buf, "user,");
for (i = 0; i < net->guestIP.nips; i++) {
const virNetDevIPAddr *ip = net->guestIP.ips[i];
@@ -8654,10 +8662,10 @@ qemuInterfaceVhostuserConnect(virQEMUDriverPtr driver,
static int
qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
virLogManagerPtr logManager,
virSecurityManagerPtr secManager,
virCommandPtr cmd,
- virDomainDefPtr def,
virDomainNetDefPtr net,
virQEMUCapsPtr qemuCaps,
unsigned int bootindex,
@@ -8666,6 +8674,7 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
size_t *nnicindexes,
int **nicindexes)
{
+ virDomainDefPtr def = vm->def;
int ret = -1;
char *nic = NULL;
char *host = NULL;
@@ -8676,9 +8685,11 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
size_t vhostfdSize = 0;
char **tapfdName = NULL;
char **vhostfdName = NULL;
+ VIR_AUTOFREE(char *) slirpfdName = NULL;
virDomainNetType actualType = virDomainNetGetActualType(net);
virNetDevBandwidthPtr actualBandwidth;
bool requireNicdev = false;
+ qemuSlirpPtr slirp;
size_t i;
@@ -8904,6 +8915,16 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
goto cleanup;
}
+ slirp = QEMU_DOMAIN_NETWORK_PRIVATE(net)->slirp;
+ if (slirp && !standalone) {
+ int slirpfd = qemuSlirpGetFD(slirp);
+ virCommandPassFD(cmd, slirpfd,
+ VIR_COMMAND_PASS_FD_CLOSE_PARENT);
+ if (virAsprintf(&slirpfdName, "%d", slirpfd) < 0)
+ goto cleanup;
+ }
+
+
for (i = 0; i < tapfdSize; i++) {
if (qemuSecuritySetTapFDLabel(driver->securityManager,
def, tapfd[i]) < 0)
@@ -8928,7 +8949,8 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
if (!(host = qemuBuildHostNetStr(net, driver,
tapfdName, tapfdSize,
- vhostfdName, vhostfdSize)))
+ vhostfdName, vhostfdSize,
+ slirpfdName)))
goto cleanup;
virCommandAddArgList(cmd, "-netdev", host, NULL);
@@ -8996,10 +9018,10 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver,
*/
static int
qemuBuildNetCommandLine(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
virLogManagerPtr logManager,
virSecurityManagerPtr secManager,
virCommandPtr cmd,
- virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
virNetDevVPortProfileOp vmop,
bool standalone,
@@ -9010,6 +9032,7 @@ qemuBuildNetCommandLine(virQEMUDriverPtr driver,
size_t i;
int last_good_net = -1;
virErrorPtr originalError = NULL;
+ virDomainDefPtr def = vm->def;
if (def->nnets) {
unsigned int bootNet = 0;
@@ -9025,7 +9048,7 @@ qemuBuildNetCommandLine(virQEMUDriverPtr driver,
for (i = 0; i < def->nnets; i++) {
virDomainNetDefPtr net = def->nets[i];
- if (qemuBuildInterfaceCommandLine(driver, logManager, secManager, cmd, def, net,
+ if (qemuBuildInterfaceCommandLine(driver, vm, logManager, secManager, cmd, net,
qemuCaps, bootNet, vmop,
standalone, nnicindexes,
nicindexes) < 0)
@@ -10817,7 +10840,7 @@ qemuBuildCommandLine(virQEMUDriverPtr driver,
if (qemuBuildFSDevCommandLine(cmd, def, qemuCaps) < 0)
goto error;
- if (qemuBuildNetCommandLine(driver, logManager, secManager, cmd, def,
+ if (qemuBuildNetCommandLine(driver, vm, logManager, secManager, cmd,
qemuCaps, vmop, standalone,
nnicindexes, nicindexes, &bootHostdevNet) < 0)
goto error;
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 8bb941e2bc..71afacbc0e 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -90,7 +90,8 @@ char *qemuBuildHostNetStr(virDomainNetDefPtr net,
char **tapfd,
size_t tapfdSize,
char **vhostfd,
- size_t vhostfdSize);
+ size_t vhostfdSize,
+ const char *slirpfd);
/* Current, best practice */
char *qemuBuildNicDevStr(virDomainDefPtr def,
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index ccff9a79d7..6e390c6ce4 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1142,6 +1142,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_NET, { .net = net } };
virErrorPtr originalError = NULL;
+ VIR_AUTOFREE(char *) slirpfdName = NULL;
char **tapfdName = NULL;
int *tapfd = NULL;
size_t tapfdSize = 0;
@@ -1380,7 +1381,8 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
if (!(netstr = qemuBuildHostNetStr(net, driver,
tapfdName, tapfdSize,
- vhostfdName, vhostfdSize)))
+ vhostfdName, vhostfdSize,
+ slirpfdName)))
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
--
2.22.0.214.g8dca754b1e
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