[libvirt] [PATCH 1/4] backup: Prepare for Unix sockets in QMP nbd-server-start
Eric Blake
eblake at redhat.com
Thu Jun 6 03:01:07 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 a nice reusable struct that can track
both TCP and Unix sockets.
Update qemumonitorjsontest to not only test the response to the
command, but to actually verify that the command itself uses the two
correct QMP forms. I'm actually a bit surprised that we are not
utilizing qemuMonitorTestAddItemVerbatim more frequently.
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 | 13 +++++---
src/qemu/qemu_monitor_json.c | 23 ++++++++++----
tests/qemumonitorjsontest.c | 58 ++++++++++++++++++++++++++++++++++--
6 files changed, 92 insertions(+), 18 deletions(-)
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index dee594fa66..fa84ff821e 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1094,9 +1094,9 @@ 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 acef1a0a79..e41bdc8c4f 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -459,8 +459,7 @@ 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 32b3040473..267a729c6f 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 6b731cd91a..187513a986 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3925,15 +3925,20 @@ 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));
+ /* Peek inside the struct for nicer logging */
+ if (server->transport == VIR_STORAGE_NET_HOST_TRANS_TCP)
+ VIR_DEBUG("server={tcp host=%s port=%u} tls_alias=%s",
+ NULLSTR(server->name), server->port, NULLSTR(tls_alias));
+ else
+ VIR_DEBUG("server={unix socket=%s} tls_alias=%s",
+ NULLSTR(server->socket), 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 53a7de8b77..93113d4e8a 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -6684,8 +6684,7 @@ qemuMonitorJSONBuildUnixSocketAddress(const char *path)
int
qemuMonitorJSONNBDServerStart(qemuMonitorPtr mon,
- const char *host,
- unsigned int port,
+ const virStorageNetHostDef *server,
const char *tls_alias)
{
int ret = -1;
@@ -6694,10 +6693,22 @@ 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 0894e748ae..9d707fcc7c 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -1348,7 +1348,6 @@ 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)
@@ -1356,6 +1355,61 @@ GEN_TEST_FUNC(qemuMonitorJSONBlockdevTrayClose, "foodev")
GEN_TEST_FUNC(qemuMonitorJSONBlockdevMediumRemove, "foodev")
GEN_TEST_FUNC(qemuMonitorJSONBlockdevMediumInsert, "foodev", "newnode")
+static int
+testQemuMonitorJSONqemuMonitorJSONNBDServerStart(const void *opaque)
+{
+ virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr) opaque;
+ qemuMonitorTestPtr test = qemuMonitorTestNewSimple(true, xmlopt);
+ int ret = -1;
+ virStorageNetHostDef server_tcp = {
+ .name = (char *)"localhost",
+ .port = 12345,
+ .transport = VIR_STORAGE_NET_HOST_TRANS_TCP,
+ };
+ virStorageNetHostDef server_unix = {
+ .socket = (char *)"/tmp/sock",
+ .transport = VIR_STORAGE_NET_HOST_TRANS_UNIX,
+ };
+
+ if (!test)
+ return -1;
+
+ if (qemuMonitorTestAddItemVerbatim(test,
+ "{\"execute\":\"nbd-server-start\","
+ " \"arguments\":{\"addr\":{"
+ " \"type\":\"inet\",\"data\":{"
+ " \"host\":\"localhost\","
+ " \"port\":\"12345\"}},"
+ " \"tls-creds\":\"test-alias\"},"
+ " \"id\":\"libvirt-1\"}",
+ NULL, "{\"return\":{}}") < 0)
+ goto cleanup;
+
+ if (qemuMonitorTestAddItemVerbatim(test,
+ "{\"execute\":\"nbd-server-start\","
+ " \"arguments\":{\"addr\":{"
+ " \"type\":\"unix\",\"data\":{"
+ " \"path\":\"/tmp/sock\"}},"
+ " \"tls-creds\":\"test-alias\"},"
+ " \"id\":\"libvirt-2\"}",
+ NULL, "{\"return\":{}}") < 0)
+ goto cleanup;
+
+ if (qemuMonitorJSONNBDServerStart(qemuMonitorTestGetMonitor(test),
+ &server_tcp, "test-alias") < 0)
+ goto cleanup;
+
+ if (qemuMonitorJSONNBDServerStart(qemuMonitorTestGetMonitor(test),
+ &server_unix, "test-alias") < 0)
+ goto cleanup;
+
+ ret = 0;
+
+ cleanup:
+ qemuMonitorTestFree(test);
+ return ret;
+}
+
static bool
testQemuMonitorJSONqemuMonitorJSONQueryCPUsEqual(struct qemuMonitorQueryCpusEntry *a,
struct qemuMonitorQueryCpusEntry *b)
@@ -3014,7 +3068,6 @@ mymain(void)
DO_TEST_GEN(qemuMonitorJSONDrivePivot);
DO_TEST_GEN(qemuMonitorJSONScreendump);
DO_TEST_GEN(qemuMonitorJSONOpenGraphics);
- DO_TEST_GEN(qemuMonitorJSONNBDServerStart);
DO_TEST_GEN(qemuMonitorJSONNBDServerAdd);
DO_TEST_GEN(qemuMonitorJSONDetachCharDev);
DO_TEST_GEN(qemuMonitorJSONBlockdevTrayOpen);
@@ -3036,6 +3089,7 @@ mymain(void)
DO_TEST(qemuMonitorJSONGetDumpGuestMemoryCapability);
DO_TEST(qemuMonitorJSONSendKeyHoldtime);
DO_TEST(qemuMonitorSupportsActiveCommit);
+ DO_TEST(qemuMonitorJSONNBDServerStart);
DO_TEST_CPU_DATA("host");
DO_TEST_CPU_DATA("full");
--
2.20.1
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