[libvirt] [PATCH v8 14/21] backup: Prepare for Unix sockets in QMP nbd-server-start
Eric Blake
eblake at redhat.com
Wed Apr 17 14:09:14 UTC 2019
Migration always uses a TCP socket for NBD servers, because we don't
support same-host migration. But upcoming pull-mode incremental backup
needs to also support a Unix socket, for retrieving the backup from
the same host. Support this by plumbing virStorageNetHostDef through
the monitor calls, since that is the same struct that backup_conf.c
chose for tracking both TCP and Unix sockets.
Signed-off-by: Eric Blake <eblake at redhat.com>
---
src/qemu/qemu_monitor.h | 6 +++---
src/qemu/qemu_monitor_json.h | 3 +--
src/qemu/qemu_migration.c | 7 ++++++-
src/qemu/qemu_monitor.c | 7 +++----
src/qemu/qemu_monitor_json.c | 23 +++++++++++++++++------
tests/qemumonitorjsontest.c | 30 +++++++++++++++++++++++++++++-
6 files changed, 59 insertions(+), 17 deletions(-)
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index caf62af5e2..1237c14a84 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1093,9 +1093,9 @@ int qemuMonitorGetObjectProps(qemuMonitorPtr mon,
char *qemuMonitorGetTargetArch(qemuMonitorPtr mon);
int qemuMonitorNBDServerStart(qemuMonitorPtr mon,
- const char *host,
- unsigned int port,
- const char *tls_alias);
+ const virStorageNetHostDef *server,
+ const char *tls_alias)
+ ATTRIBUTE_NONNULL(2);
int qemuMonitorNBDServerAdd(qemuMonitorPtr mon,
const char *deviceID,
bool writable);
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index c10513da15..e8472948b5 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -458,8 +458,7 @@ int qemuMonitorJSONGetObjectProps(qemuMonitorPtr mon,
char *qemuMonitorJSONGetTargetArch(qemuMonitorPtr mon);
int qemuMonitorJSONNBDServerStart(qemuMonitorPtr mon,
- const char *host,
- unsigned int port,
+ const virStorageNetHostDef *server,
const char *tls_alias);
int qemuMonitorJSONNBDServerAdd(qemuMonitorPtr mon,
const char *deviceID,
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index e3ad4e52a7..09bd6fbb63 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -380,6 +380,10 @@ qemuMigrationDstStartNBDServer(virQEMUDriverPtr driver,
unsigned short port = 0;
char *diskAlias = NULL;
size_t i;
+ virStorageNetHostDef server = {
+ .name = (char *)listenAddr, /* cast away const */
+ .transport = VIR_STORAGE_NET_HOST_TRANS_TCP,
+ };
if (nbdPort < 0 || nbdPort > USHRT_MAX) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
@@ -415,7 +419,8 @@ qemuMigrationDstStartNBDServer(virQEMUDriverPtr driver,
else if (virPortAllocatorAcquire(driver->migrationPorts, &port) < 0)
goto exit_monitor;
- if (qemuMonitorNBDServerStart(priv->mon, listenAddr, port, tls_alias) < 0)
+ server.port = port;
+ if (qemuMonitorNBDServerStart(priv->mon, &server, tls_alias) < 0)
goto exit_monitor;
}
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index babcbde878..694ed90622 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3924,15 +3924,14 @@ qemuMonitorGetSEVCapabilities(qemuMonitorPtr mon,
int
qemuMonitorNBDServerStart(qemuMonitorPtr mon,
- const char *host,
- unsigned int port,
+ const virStorageNetHostDef *server,
const char *tls_alias)
{
- VIR_DEBUG("host=%s port=%u tls_alias=%s", host, port, NULLSTR(tls_alias));
+ VIR_DEBUG("server=%p tls_alias=%s", server, NULLSTR(tls_alias));
QEMU_CHECK_MONITOR(mon);
- return qemuMonitorJSONNBDServerStart(mon, host, port, tls_alias);
+ return qemuMonitorJSONNBDServerStart(mon, server, tls_alias);
}
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index e7d063a5a8..fc2d193ae2 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -6694,8 +6694,7 @@ qemuMonitorJSONBuildUnixSocketAddress(const char *path)
int
qemuMonitorJSONNBDServerStart(qemuMonitorPtr mon,
- const char *host,
- unsigned int port,
+ const virStorageNetHostDef *server,
const char *tls_alias)
{
int ret = -1;
@@ -6704,10 +6703,22 @@ qemuMonitorJSONNBDServerStart(qemuMonitorPtr mon,
virJSONValuePtr addr = NULL;
char *port_str = NULL;
- if (virAsprintf(&port_str, "%u", port) < 0)
- return ret;
-
- if (!(addr = qemuMonitorJSONBuildInetSocketAddress(host, port_str)))
+ switch ((virStorageNetHostTransport)server->transport) {
+ case VIR_STORAGE_NET_HOST_TRANS_TCP:
+ if (virAsprintf(&port_str, "%u", server->port) < 0)
+ return ret;
+ addr = qemuMonitorJSONBuildInetSocketAddress(server->name, port_str);
+ break;
+ case VIR_STORAGE_NET_HOST_TRANS_UNIX:
+ addr = qemuMonitorJSONBuildUnixSocketAddress(server->socket);
+ break;
+ case VIR_STORAGE_NET_HOST_TRANS_RDMA:
+ case VIR_STORAGE_NET_HOST_TRANS_LAST:
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("invalid server address"));
+ goto cleanup;
+ }
+ if (!addr)
goto cleanup;
if (!(cmd = qemuMonitorJSONMakeCommand("nbd-server-start",
diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c
index f5ad3f6a73..dd3259494a 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -1350,7 +1350,6 @@ GEN_TEST_FUNC(qemuMonitorJSONBlockCommit, "vdb", "/foo/bar1", "/foo/bar2", "back
GEN_TEST_FUNC(qemuMonitorJSONDrivePivot, "vdb")
GEN_TEST_FUNC(qemuMonitorJSONScreendump, "devicename", 1, "/foo/bar")
GEN_TEST_FUNC(qemuMonitorJSONOpenGraphics, "spice", "spicefd", false)
-GEN_TEST_FUNC(qemuMonitorJSONNBDServerStart, "localhost", 12345, "test-alias")
GEN_TEST_FUNC(qemuMonitorJSONNBDServerAdd, "vda", true)
GEN_TEST_FUNC(qemuMonitorJSONDetachCharDev, "serial1")
GEN_TEST_FUNC(qemuMonitorJSONBlockdevTrayOpen, "foodev", true)
@@ -1358,6 +1357,35 @@ GEN_TEST_FUNC(qemuMonitorJSONBlockdevTrayClose, "foodev")
GEN_TEST_FUNC(qemuMonitorJSONBlockdevMediumRemove, "foodev")
GEN_TEST_FUNC(qemuMonitorJSONBlockdevMediumInsert, "foodev", "newnode")
+static int
+testQemuMonitorJSONqemuMonitorJSONNBDServerStart(const void *data)
+{
+ virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
+ qemuMonitorTestPtr test = qemuMonitorTestNewSimple(true, xmlopt);
+ int ret = -1;
+ virStorageNetHostDef server = {
+ .name = (char *)"localhost",
+ .port = 12345,
+ .transport = VIR_STORAGE_NET_HOST_TRANS_TCP,
+ };
+
+ if (!test)
+ return -1;
+
+ if (qemuMonitorTestAddItem(test, "nbd-server-start", "{\"return\":{}}") < 0)
+ goto cleanup;
+
+ if (qemuMonitorJSONNBDServerStart(qemuMonitorTestGetMonitor(test),
+ &server, "test-alias") < 0)
+ goto cleanup;
+
+ ret = 0;
+
+ cleanup:
+ qemuMonitorTestFree(test);
+ return ret;
+}
+
static bool
testQemuMonitorJSONqemuMonitorJSONQueryCPUsEqual(struct qemuMonitorQueryCpusEntry *a,
struct qemuMonitorQueryCpusEntry *b)
--
2.20.1
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