Re: [libvirt] [PATCH 2/3] qemu: improve device flag parsing

* src/qemu/qemu_capabilities.h (qemuCapsParseDeviceStr): New prototype. * src/qemu/qemu_capabilities.c (qemuCapsParsePCIDeviceStrs) Rename and split... (qemuCapsExtractDeviceStr, qemuCapsParseDeviceStr): ...to make it easier to add and test device-specific checks. (qemuCapsExtractVersionInfo): Update caller. * tests/qemuhelptest.c (testHelpStrParsing): Also test parsing of device-related flags. (mymain): Update expected flags. * tests/qemuhelpdata/qemu-0.12.1-device: New file. * tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel60-device: New file. * tests/qemuhelpdata/qemu-kvm-0.12.3-device: New file. * tests/qemuhelpdata/qemu-kvm-0.13.0-device: New file. --- src/qemu/qemu_capabilities.c | 41 ++++++++--- src/qemu/qemu_capabilities.h | 2 + tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel60-device | 57 ++++++++++++++++ tests/qemuhelpdata/qemu-kvm-0.13.0-device | 70 ++++++++++++++++++++ tests/qemuhelptest.c | 48 ++++++++++---- 5 files changed, 195 insertions(+), 23 deletions(-) create mode 100644 tests/qemuhelpdata/qemu-0.12.1-device create mode 100644 tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel60-device create mode 100644 tests/qemuhelpdata/qemu-kvm-0.12.3-device create mode 100644 tests/qemuhelpdata/qemu-kvm-0.13.0-device diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 9bab317..f967255 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -1032,28 +1032,46 @@ fail: return -1; } -static void -qemuCapsParsePCIDeviceStrs(const char *qemu, - unsigned long long *flags) +static int +qemuCapsExtractDeviceStr(const char *qemu, + unsigned long long *flags) { - char *pciassign = NULL; + char *output = NULL; virCommandPtr cmd; + int ret = -1; - cmd = virCommandNewArgList(qemu, "-device", "pci-assign,?", NULL); + /* Cram together all device-related queries into one invocation; + * the output format makes it possible to distinguish what we + * need. Unrecognized '-device bogus,?' cause an error in + * isolation, but are silently ignored in combination with + * '-device ?'. */ + cmd = virCommandNewArgList(qemu, + "-device", "pci-assign,?", + NULL); virCommandAddEnvPassCommon(cmd); /* qemu -help goes to stdout, but qemu -device ? goes to stderr. */ - virCommandSetErrorBuffer(cmd,&pciassign); + virCommandSetErrorBuffer(cmd,&output); virCommandClearCaps(cmd); if (virCommandRun(cmd, NULL)< 0) goto cleanup; - if (strstr(pciassign, "pci-assign.configfd")) - *flags |= QEMUD_CMD_FLAG_PCI_CONFIGFD; + ret = qemuCapsParseDeviceStr(output, flags); cleanup: - VIR_FREE(pciassign); + VIR_FREE(output); virCommandFree(cmd); + return ret; +} + + +int +qemuCapsParseDeviceStr(const char *str, unsigned long long *flags) +{ + if (strstr(str, "pci-assign.configfd")) + *flags |= QEMUD_CMD_FLAG_PCI_CONFIGFD; + + return 0; } int qemuCapsExtractVersionInfo(const char *qemu, @@ -1092,8 +1110,9 @@ int qemuCapsExtractVersionInfo(const char *qemu, &version,&is_kvm,&kvm_version) == -1) goto cleanup; - if (flags& QEMUD_CMD_FLAG_DEVICE) - qemuCapsParsePCIDeviceStrs(qemu,&flags); + if ((flags& QEMUD_CMD_FLAG_DEVICE)&& + qemuCapsExtractDeviceStr(qemu,&flags)< 0) + goto cleanup;