[libvirt] [PATCH v3 1/2] Optimize machine option to set more options with it
Li Zhang
zhlcindy at gmail.com
Fri Mar 29 05:22:46 UTC 2013
From: Li Zhang <zhlcindy at linux.vnet.ibm.com>
Currently, -machine option is used only when dump-guest-core is set.
To use options defined in machine option for newer version of QEMU,
it needs to use -machine xxx, and to be compatible with older version
-M, this patch addes QEMU_CAPS_MACHINE_OPT capability for newer
version which supports -machine option.
Signed-off-by: Li Zhang <zhlcindy at linux.vnet.ibm.com>
---
v3 -> v2:
* Set QEMU_CAPS_MACHINE_OPT with help string
* Set QEMU_CAPS_DUMP_GUEST_CORE with QMP
v2 -> v1:
* Split the patch to 2 parts suggested by Daniel P.Berrange
* Rename QEMU_CAPS_MACH_OPT to QEMU_CAPS_MACHINE_OPT
* Remove version 1.1 assertion for QEMU_CAPS_MACHINE_OPT
src/qemu/qemu_capabilities.c | 11 +++++++++++
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_command.c | 32 ++++++++++++++++++--------------
tests/qemuhelptest.c | 4 ++++
tests/qemuxml2argvtest.c | 6 +++---
5 files changed, 37 insertions(+), 17 deletions(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 861d3c4..7d459db 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -213,6 +213,8 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
"virtio-ccw",
"dtb",
"megasas",
+
+ "machine-opt", /* 135 */
);
struct _virQEMUCaps {
@@ -1091,6 +1093,9 @@ virQEMUCapsComputeCmdFlags(const char *help,
if (strstr(help, "-dtb"))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_DTB);
+ if (strstr(help, "-machine"))
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_OPT);
+
/*
* Handling of -incoming arg with varying features
* -incoming tcp (kvm >= 79, qemu >= 0.10.0)
@@ -2442,6 +2447,12 @@ virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps,
virQEMUCapsInitQMPBasic(qemuCaps);
+ /* machine option is supported for newer version */
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_OPT);
+
+ /* -dump-guest-core is supported for newer version*/
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE);
+
if (!(archstr = qemuMonitorGetTargetArch(mon)))
goto cleanup;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 7101f67..2595868 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -174,6 +174,7 @@ enum virQEMUCapsFlags {
QEMU_CAPS_VIRTIO_CCW = 132, /* -device virtio-*-ccw */
QEMU_CAPS_DTB = 133, /* -dtb file */
QEMU_CAPS_SCSI_MEGASAS = 134, /* -device megasas */
+ QEMU_CAPS_MACHINE_OPT = 135, /* -machine xxxx*/
QEMU_CAPS_LAST, /* this must always be the last item */
};
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index a0c278f..0ee634b 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5197,6 +5197,8 @@ qemuBuildMachineArgStr(virCommandPtr cmd,
const virDomainDefPtr def,
virQEMUCapsPtr qemuCaps)
{
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+
/* This should *never* be NULL, since we always provide
* a machine in the capabilities data for QEMU. So this
* check is just here as a safety in case the unexpected
@@ -5204,27 +5206,29 @@ qemuBuildMachineArgStr(virCommandPtr cmd,
if (!def->os.machine)
return 0;
- if (!def->mem.dump_core) {
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_OPT)) {
/* if no parameter to the machine type is needed, we still use
* '-M' to keep the most of the compatibility with older versions.
*/
virCommandAddArgList(cmd, "-M", def->os.machine, NULL);
} else {
- if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE)) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- "%s", _("dump-guest-core is not available "
- " with this QEMU binary"));
- return -1;
- }
- /* However, in case there is a parameter to be added, we need to
- * use the "-machine" parameter because qemu is not parsing the
- * "-M" correctly */
virCommandAddArg(cmd, "-machine");
- virCommandAddArgFormat(cmd,
- "%s,dump-guest-core=%s",
- def->os.machine,
- virDomainMemDumpTypeToString(def->mem.dump_core));
+ virBufferAsprintf(&buf, "%s", def->os.machine);
+
+ if (def->mem.dump_core) {
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DUMP_GUEST_CORE)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("dump-guest-core is not available "
+ " with this QEMU binary"));
+ return -1;
+ }
+
+ virBufferAsprintf(&buf, ",dump-guest-core=%s",
+ virDomainMemDumpTypeToString(def->mem.dump_core));
+ }
+
+ virCommandAddArg(cmd, virBufferContentAndReset(&buf));
}
return 0;
diff --git a/tests/qemuhelptest.c b/tests/qemuhelptest.c
index a28109a..0c7e607 100644
--- a/tests/qemuhelptest.c
+++ b/tests/qemuhelptest.c
@@ -718,6 +718,7 @@ mymain(void)
QEMU_CAPS_SCSI_LSI,
QEMU_CAPS_BLOCKIO,
QEMU_CAPS_VNC,
+ QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_DEVICE_QXL,
QEMU_CAPS_DEVICE_VGA,
QEMU_CAPS_DEVICE_CIRRUS_VGA,
@@ -806,6 +807,7 @@ mymain(void)
QEMU_CAPS_VIRTIO_SCSI,
QEMU_CAPS_BLOCKIO,
QEMU_CAPS_VNC,
+ QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_DEVICE_QXL,
QEMU_CAPS_DEVICE_VGA,
QEMU_CAPS_DEVICE_CIRRUS_VGA,
@@ -903,6 +905,7 @@ mymain(void)
QEMU_CAPS_SECCOMP_SANDBOX,
QEMU_CAPS_DUMP_GUEST_CORE,
QEMU_CAPS_VNC,
+ QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_USB_REDIR_BOOTINDEX,
QEMU_CAPS_USB_HOST_BOOTINDEX,
QEMU_CAPS_DEVICE_QXL,
@@ -1009,6 +1012,7 @@ mymain(void)
QEMU_CAPS_SECCOMP_SANDBOX,
QEMU_CAPS_DUMP_GUEST_CORE,
QEMU_CAPS_VNC,
+ QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_USB_REDIR_BOOTINDEX,
QEMU_CAPS_USB_HOST_BOOTINDEX,
QEMU_CAPS_DEVICE_QXL,
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 38787ac..4b45c55 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -363,9 +363,9 @@ mymain(void)
DO_TEST("minimal-s390", QEMU_CAPS_NAME);
DO_TEST("machine-aliases1", NONE);
DO_TEST("machine-aliases2", QEMU_CAPS_KVM);
- DO_TEST("machine-core-on", QEMU_CAPS_DUMP_GUEST_CORE);
- DO_TEST("machine-core-off", QEMU_CAPS_DUMP_GUEST_CORE);
- DO_TEST_FAILURE("machine-core-on", NONE);
+ DO_TEST("machine-core-on", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DUMP_GUEST_CORE);
+ DO_TEST("machine-core-off", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DUMP_GUEST_CORE);
+ DO_TEST_FAILURE("machine-core-on", QEMU_CAPS_MACHINE_OPT, NONE);
DO_TEST("boot-cdrom", NONE);
DO_TEST("boot-network", NONE);
DO_TEST("boot-floppy", NONE);
--
1.7.10.1
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