Since 0d70656afded, it starts to access the sysfs files to build
the qemu command line (by virSCSIDeviceGetSgName, which is to find
out the scsi generic device name by adpater:bus:target:unit), there
is no way to work around, qemu wants to see the scsi generic device
like "/dev/sg6" anyway.
And there might be other places which need to access sysfs files
when building qemu command line in future.
Instead of increasing the arguments of qemuBuildCommandLine, this
introduces a new callback for qemuBuildCommandLine, and thus tests
can register their own callbacks for sysfs test input files accessing.
* src/qemu/qemu_command.h: (New callback struct
qemuBuildCommandLineCallbacks;
extern buildCommandLineCallbacks)
* src/qemu/qemu_command.c: (wire up the callback struct)
* src/qemu/qemu_driver.c: (Use the new syntax of qemuBuildCommandLine)
* src/qemu/qemu_hotplug.c: Likewise
* src/qemu/qemu_process.c: Likewise
* tests/qemuxml2argvtest.c: (Helper testSCSIDeviceGetSgName;
callback struct testCallbacks;
Use the callback struct)
* src/tests/qemuxmlnstest.c: (Like above)
---
src/qemu/qemu_command.c | 22 ++++++++++++++--------
src/qemu/qemu_command.h | 19 ++++++++++++++++---
src/qemu/qemu_driver.c | 3 ++-
src/qemu/qemu_hotplug.c | 6 ++++--
src/qemu/qemu_process.c | 3 ++-
tests/qemuxml2argvtest.c | 21 ++++++++++++++++++++-
tests/qemuxmlnstest.c | 21 ++++++++++++++++++++-
7 files changed, 78 insertions(+), 17 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index c268a3a..33a1910 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4757,17 +4757,18 @@ qemuBuildUSBHostdevUsbDevStr(virDomainHostdevDefPtr dev)
char *
qemuBuildSCSIHostdevDrvStr(virDomainHostdevDefPtr dev,
- virQEMUCapsPtr qemuCaps ATTRIBUTE_UNUSED)
+ virQEMUCapsPtr qemuCaps ATTRIBUTE_UNUSED,
+ qemuBuildCommandLineCallbacksPtr callbacks)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *sg = NULL;
- if (!(sg = virSCSIDeviceGetSgName(dev->source.subsys.u.scsi.adapter,
- dev->source.subsys.u.scsi.bus,
- dev->source.subsys.u.scsi.target,
- dev->source.subsys.u.scsi.unit))) {
+ sg =
(callbacks->qemuGetSCSIDeviceSgName)(dev->source.subsys.u.scsi.adapter,
+ dev->source.subsys.u.scsi.bus,
+ dev->source.subsys.u.scsi.target,
+ dev->source.subsys.u.scsi.unit);
+ if (!sg)
goto error;
- }
virBufferAsprintf(&buf, "file=/dev/%s,if=none", sg);
virBufferAsprintf(&buf, ",id=%s-%s",
@@ -6405,6 +6406,10 @@ qemuBuildGraphicsCommandLine(virQEMUDriverConfigPtr cfg,
return 0;
}
+qemuBuildCommandLineCallbacks buildCommandLineCallbacks = {
+ .qemuGetSCSIDeviceSgName = virSCSIDeviceGetSgName,
+};
+
/*
* Constructs a argv suitable for launching qemu with config defined
* for a given virtual machine.
@@ -6422,7 +6427,8 @@ qemuBuildCommandLine(virConnectPtr conn,
const char *migrateFrom,
int migrateFd,
virDomainSnapshotObjPtr snapshot,
- enum virNetDevVPortProfileOp vmop)
+ enum virNetDevVPortProfileOp vmop,
+ qemuBuildCommandLineCallbacksPtr callbacks)
{
virErrorPtr originalError = NULL;
int i, j;
@@ -8254,7 +8260,7 @@ qemuBuildCommandLine(virConnectPtr conn,
char *drvstr;
virCommandAddArg(cmd, "-drive");
- if (!(drvstr = qemuBuildSCSIHostdevDrvStr(hostdev, qemuCaps)))
+ if (!(drvstr = qemuBuildSCSIHostdevDrvStr(hostdev, qemuCaps,
callbacks)))
goto error;
virCommandAddArg(cmd, drvstr);
VIR_FREE(drvstr);
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 36dfa6b..133e0b2 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -51,6 +51,16 @@
# define QEMU_WEBSOCKET_PORT_MIN 5700
# define QEMU_WEBSOCKET_PORT_MAX 65535
+typedef struct _qemuBuildCommandLineCallbacks qemuBuildCommandLineCallbacks;
+typedef qemuBuildCommandLineCallbacks *qemuBuildCommandLineCallbacksPtr;
+struct _qemuBuildCommandLineCallbacks {
+ char * (*qemuGetSCSIDeviceSgName) (const char *adapter,
+ unsigned int bus,
+ unsigned int target,
+ unsigned int unit);
+};
+
+extern qemuBuildCommandLineCallbacks buildCommandLineCallbacks;
virCommandPtr qemuBuildCommandLine(virConnectPtr conn,
virQEMUDriverPtr driver,
@@ -61,8 +71,9 @@ virCommandPtr qemuBuildCommandLine(virConnectPtr conn,
const char *migrateFrom,
int migrateFd,
virDomainSnapshotObjPtr current_snapshot,
- enum virNetDevVPortProfileOp vmop)
- ATTRIBUTE_NONNULL(1);
+ enum virNetDevVPortProfileOp vmop,
+ qemuBuildCommandLineCallbacksPtr callbacks)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(11);
/* Generate string for arch-specific '-device' parameter */
char *
@@ -142,7 +153,9 @@ char * qemuBuildUSBHostdevDevStr(virDomainHostdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
char * qemuBuildSCSIHostdevDrvStr(virDomainHostdevDefPtr dev,
- virQEMUCapsPtr qemuCaps);
+ virQEMUCapsPtr qemuCaps,
+ qemuBuildCommandLineCallbacksPtr callbacks)
+ ATTRIBUTE_NONNULL(3);
char * qemuBuildSCSIHostdevDevStr(virDomainDefPtr def,
virDomainHostdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 203cc6d..0665131 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5362,7 +5362,8 @@ static char *qemuConnectDomainXMLToNative(virConnectPtr
conn,
if (!(cmd = qemuBuildCommandLine(conn, driver, def,
&monConfig, monitor_json, qemuCaps,
- NULL, -1, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_NO_OP)))
+ NULL, -1, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_NO_OP,
+ &buildCommandLineCallbacks)))
goto cleanup;
ret = virCommandToString(cmd);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index d037c9d..77d9f4f 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1226,7 +1226,8 @@ qemuDomainAttachHostScsiDevice(virQEMUDriverPtr driver,
if (qemuAssignDeviceHostdevAlias(vm->def, hostdev, 0) < 0)
goto cleanup;
- if (!(drvstr = qemuBuildSCSIHostdevDrvStr(hostdev, priv->qemuCaps)))
+ if (!(drvstr = qemuBuildSCSIHostdevDrvStr(hostdev, priv->qemuCaps,
+ &buildCommandLineCallbacks)))
goto cleanup;
if (!(devstr = qemuBuildSCSIHostdevDevStr(vm->def, hostdev, priv->qemuCaps)))
@@ -2543,7 +2544,8 @@ qemuDomainDetachHostScsiDevice(virQEMUDriverPtr driver,
return -1;
}
- if (!(drvstr = qemuBuildSCSIHostdevDrvStr(detach, priv->qemuCaps)))
+ if (!(drvstr = qemuBuildSCSIHostdevDrvStr(detach, priv->qemuCaps,
+ &buildCommandLineCallbacks)))
goto cleanup;
if (!(devstr = qemuBuildSCSIHostdevDevStr(vm->def, detach,
priv->qemuCaps)))
goto cleanup;
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 4a7c612..95e712c 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3605,7 +3605,8 @@ int qemuProcessStart(virConnectPtr conn,
VIR_DEBUG("Building emulator command line");
if (!(cmd = qemuBuildCommandLine(conn, driver, vm->def, priv->monConfig,
priv->monJSON, priv->qemuCaps,
- migrateFrom, stdin_fd, snapshot, vmop)))
+ migrateFrom, stdin_fd, snapshot, vmop,
+ &buildCommandLineCallbacks)))
goto cleanup;
/* now that we know it is about to start call the hook if present */
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index d853308..e103925 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -82,6 +82,24 @@ typedef enum {
FLAG_JSON = 1 << 3,
} virQemuXML2ArgvTestFlags;
+static char *
+testSCSIDeviceGetSgName(const char *adapter ATTRIBUTE_UNUSED,
+ unsigned int bus ATTRIBUTE_UNUSED,
+ unsigned int target ATTRIBUTE_UNUSED,
+ unsigned int unit ATTRIBUTE_UNUSED)
+{
+ char *sg = NULL;
+
+ if (VIR_STRDUP(sg, "sg0") < 0)
+ return NULL;
+
+ return sg;
+}
+
+static qemuBuildCommandLineCallbacks testCallbacks = {
+ .qemuGetSCSIDeviceSgName = testSCSIDeviceGetSgName,
+};
