From b073fe40db4dadee0e127108d99e8713758078ef Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Thu, 13 Sep 2012 18:04:24 +0100 Subject: [PATCH] Refactor qemuCapsParseDeviceStr to work from data tables Currently the qemuCapsParseDeviceStr method has a bunch of open coded string searches/comparisons to detect devices and their properties. Soon this data will be obtained from QMP queries instead of -device help output. Maintaining the list of device and properties in two places is undesirable. Thus the existing qemuCapsParseDeviceStr() method needs to be refactored to separate the device types and properties from the actual search code. Thus the -device help output is now parsed to construct a list of device names, and device properties. These are then checked against a set of datatables to set the capability flags Signed-off-by: Daniel P. Berrange --- src/qemu/qemu_capabilities.c | 369 +++++++++++++++++++++++++---------- src/qemu/qemu_capabilities.h | 3 +- tests/qemuhelptest.c | 2 +- 3 files changed, 264 insertions(+), 110 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index c21949ba73..f0442ee0a5 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -1237,6 +1237,267 @@ cleanup: return -1; } + +struct qemuCapsStringFlags { + const char *value; + int flag; +}; + + +struct qemuCapsStringFlags qemuCapsObjectTypes[] = { + { "hda-duplex", QEMU_CAPS_HDA_DUPLEX }, + { "hda-micro", QEMU_CAPS_HDA_MICRO }, + { "ccid-card-emulated", QEMU_CAPS_CCID_EMULATED }, + { "ccid-card-passthru", QEMU_CAPS_CCID_PASSTHRU }, + { "piix3-usb-uhci", QEMU_CAPS_PIIX3_USB_UHCI }, + { "piix4-usb-uhci", QEMU_CAPS_PIIX4_USB_UHCI }, + { "usb-ehci", QEMU_CAPS_USB_EHCI }, + { "ich9-usb-ehci1", QEMU_CAPS_ICH9_USB_EHCI1 }, + { "vt82c686b-usb-uhci", QEMU_CAPS_VT82C686B_USB_UHCI }, + { "pci-ohci", QEMU_CAPS_PCI_OHCI }, + { "nec-usb-xhci", QEMU_CAPS_NEC_USB_XHCI }, + { "usb-redir", QEMU_CAPS_USB_REDIR }, + { "usb-hub", QEMU_CAPS_USB_HUB }, + { "ich9-ahci", QEMU_CAPS_ICH9_AHCI }, + { "virtio-blk-s390", QEMU_CAPS_VIRTIO_S390 }, + { "lsi53c895a", QEMU_CAPS_SCSI_LSI }, + { "virtio-scsi-pci", QEMU_CAPS_VIRTIO_SCSI_PCI }, + { "spicevmc", QEMU_CAPS_DEVICE_SPICEVMC }, + { "qxl-vga", QEMU_CAPS_DEVICE_QXL_VGA }, + { "sga", QEMU_CAPS_SGA }, + { "scsi-block", QEMU_CAPS_SCSI_BLOCK }, + { "scsi-cd", QEMU_CAPS_SCSI_CD }, + { "ide-cd", QEMU_CAPS_IDE_CD }, +}; + + +static struct qemuCapsStringFlags qemuCapsObjectPropsVirtioBlk[] = { + { "multifunction", QEMU_CAPS_PCI_MULTIFUNCTION }, + { "bootindex", QEMU_CAPS_BOOTINDEX }, + { "ioeventfd", QEMU_CAPS_VIRTIO_IOEVENTFD }, + { "event_idx", QEMU_CAPS_VIRTIO_BLK_EVENT_IDX }, + { "scsi", QEMU_CAPS_VIRTIO_BLK_SCSI }, + { "logical_block_size", QEMU_CAPS_BLOCKIO }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsVirtioNet[] = { + { "tx", QEMU_CAPS_VIRTIO_TX_ALG }, + { "event_idx", QEMU_CAPS_VIRTIO_NET_EVENT_IDX }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsPciAssign[] = { + { "configfd", QEMU_CAPS_PCI_CONFIGFD }, + { "bootindex", QEMU_CAPS_PCI_BOOTINDEX }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsScsiDisk[] = { + { "channel", QEMU_CAPS_SCSI_DISK_CHANNEL }, + { "wwn", QEMU_CAPS_SCSI_DISK_WWN }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsIDEDrive[] = { + { "wwn", QEMU_CAPS_IDE_DRIVE_WWN }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsPixx4PM[] = { + { "disable_s3", QEMU_CAPS_DISABLE_S3 }, + { "disable_s4", QEMU_CAPS_DISABLE_S4 }, +}; + +static struct qemuCapsStringFlags qemuCapsObjectPropsUsbRedir[] = { + { "filter", QEMU_CAPS_USB_REDIR_FILTER }, +}; + +struct qemuCapsObjectTypeProps { + const char *type; + struct qemuCapsStringFlags *props; + size_t nprops; +}; + +static struct qemuCapsObjectTypeProps qemuCapsObjectProps[] = { + { "virtio-blk-pci", qemuCapsObjectPropsVirtioBlk, + ARRAY_CARDINALITY(qemuCapsObjectPropsVirtioBlk) }, + { "virtio-net-pci", qemuCapsObjectPropsVirtioNet, + ARRAY_CARDINALITY(qemuCapsObjectPropsVirtioNet) }, + { "pci-assign", qemuCapsObjectPropsPciAssign, + ARRAY_CARDINALITY(qemuCapsObjectPropsPciAssign) }, + { "scsi-disk", qemuCapsObjectPropsScsiDisk, + ARRAY_CARDINALITY(qemuCapsObjectPropsScsiDisk) }, + { "ide-drive", qemuCapsObjectPropsIDEDrive, + ARRAY_CARDINALITY(qemuCapsObjectPropsIDEDrive) }, + { "PIIX4_PM", qemuCapsObjectPropsPixx4PM, + ARRAY_CARDINALITY(qemuCapsObjectPropsPixx4PM) }, + { "usb-redir", qemuCapsObjectPropsUsbRedir, + ARRAY_CARDINALITY(qemuCapsObjectPropsUsbRedir) }, +}; + + +static void +qemuCapsProcessStringFlags(qemuCapsPtr caps, + size_t nflags, + struct qemuCapsStringFlags *flags, + size_t nvalues, + char *const*values) +{ + size_t i, j; + for (i = 0 ; i < nflags ; i++) { + for (j = 0 ; j < nvalues ; j++) { + if (STREQ(values[j], flags[i].value)) { + qemuCapsSet(caps, flags[i].flag); + break; + } + } + } +} + + +static void +qemuCapsFreeStringList(size_t len, + char **values) +{ + size_t i; + for (i = 0 ; i < len ; i++) + VIR_FREE(values[i]); + VIR_FREE(values); +} + + +#define OBJECT_TYPE_PREFIX "name \"" + +static int +qemuCapsParseDeviceStrObjectTypes(const char *str, + char ***types) +{ + const char *tmp = str; + int ret = -1; + size_t ntypelist = 0; + char **typelist = NULL; + + *types = NULL; + + while ((tmp = strstr(tmp, OBJECT_TYPE_PREFIX))) { + char *end; + tmp += strlen(OBJECT_TYPE_PREFIX); + end = strstr(tmp, "\""); + if (!end) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Malformed QEMU device list string, missing quote")); + goto cleanup; + } + + if (VIR_EXPAND_N(typelist, ntypelist, 1) < 0) { + virReportOOMError(); + goto cleanup; + } + if (!(typelist[ntypelist-1] = strndup(tmp, end-tmp))) { + virReportOOMError(); + goto cleanup; + } + } + + *types = typelist; + ret = ntypelist; + +cleanup: + if (ret < 0) + qemuCapsFreeStringList(ntypelist, typelist); + return ret; +} + + +static int +qemuCapsParseDeviceStrObjectProps(const char *str, + const char *type, + char ***props) +{ + const char *tmp = str; + int ret = -1; + size_t nproplist = 0; + char **proplist = NULL; + + VIR_DEBUG("Extract type %s", type); + *props = NULL; + + while ((tmp = strchr(tmp, '\n'))) { + char *end; + tmp += 1; + + if (*tmp == '\0') + break; + + if (STRPREFIX(tmp, OBJECT_TYPE_PREFIX)) + continue; + + if (!STRPREFIX(tmp, type)) + continue; + + tmp += strlen(type); + if (*tmp != '.') + continue; + tmp++; + + end = strstr(tmp, "="); + if (!end) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Malformed QEMU device list string, missing '='")); + goto cleanup; + } + if (VIR_EXPAND_N(proplist, nproplist, 1) < 0) { + virReportOOMError(); + goto cleanup; + } + if (!(proplist[nproplist-1] = strndup(tmp, end-tmp))) { + virReportOOMError(); + goto cleanup; + } + } + + *props = proplist; + ret = nproplist; + +cleanup: + if (ret < 0) + qemuCapsFreeStringList(nproplist, proplist); + return ret; +} + + +int +qemuCapsParseDeviceStr(qemuCapsPtr caps, const char *str) +{ + int nvalues; + char **values; + size_t i; + + if ((nvalues = qemuCapsParseDeviceStrObjectTypes(str, &values)) < 0) + return -1; + qemuCapsProcessStringFlags(caps, + ARRAY_CARDINALITY(qemuCapsObjectTypes), + qemuCapsObjectTypes, + nvalues, values); + qemuCapsFreeStringList(nvalues, values); + + for (i = 0 ; i < ARRAY_CARDINALITY(qemuCapsObjectProps); i++) { + const char *type = qemuCapsObjectProps[i].type; + if ((nvalues = qemuCapsParseDeviceStrObjectProps(str, + type, + &values)) < 0) + return -1; + qemuCapsProcessStringFlags(caps, + qemuCapsObjectProps[i].nprops, + qemuCapsObjectProps[i].props, + nvalues, values); + qemuCapsFreeStringList(nvalues, values); + } + + /* Prefer -chardev spicevmc (detected earlier) over -device spicevmc */ + if (qemuCapsGet(caps, QEMU_CAPS_CHARDEV_SPICEVMC)) + qemuCapsClear(caps, QEMU_CAPS_DEVICE_SPICEVMC); + + return 0; +} + + static int qemuCapsExtractDeviceStr(const char *qemu, qemuCapsPtr caps) @@ -1270,7 +1531,7 @@ qemuCapsExtractDeviceStr(const char *qemu, if (virCommandRun(cmd, NULL) < 0) goto cleanup; - ret = qemuCapsParseDeviceStr(output, caps); + ret = qemuCapsParseDeviceStr(caps, output); cleanup: VIR_FREE(output); @@ -1279,112 +1540,6 @@ cleanup: } -int -qemuCapsParseDeviceStr(const char *str, qemuCapsPtr caps) -{ - /* Which devices exist. */ - if (strstr(str, "name \"hda-duplex\"")) - qemuCapsSet(caps, QEMU_CAPS_HDA_DUPLEX); - if (strstr(str, "name \"hda-micro\"")) - qemuCapsSet(caps, QEMU_CAPS_HDA_MICRO); - if (strstr(str, "name \"ccid-card-emulated\"")) - qemuCapsSet(caps, QEMU_CAPS_CCID_EMULATED); - if (strstr(str, "name \"ccid-card-passthru\"")) - qemuCapsSet(caps, QEMU_CAPS_CCID_PASSTHRU); - - if (strstr(str, "name \"piix3-usb-uhci\"")) - qemuCapsSet(caps, QEMU_CAPS_PIIX3_USB_UHCI); - if (strstr(str, "name \"piix4-usb-uhci\"")) - qemuCapsSet(caps, QEMU_CAPS_PIIX4_USB_UHCI); - if (strstr(str, "name \"usb-ehci\"")) - qemuCapsSet(caps, QEMU_CAPS_USB_EHCI); - if (strstr(str, "name \"ich9-usb-ehci1\"")) - qemuCapsSet(caps, QEMU_CAPS_ICH9_USB_EHCI1); - if (strstr(str, "name \"vt82c686b-usb-uhci\"")) - qemuCapsSet(caps, QEMU_CAPS_VT82C686B_USB_UHCI); - if (strstr(str, "name \"pci-ohci\"")) - qemuCapsSet(caps, QEMU_CAPS_PCI_OHCI); - if (strstr(str, "name \"nec-usb-xhci\"")) - qemuCapsSet(caps, QEMU_CAPS_NEC_USB_XHCI); - if (strstr(str, "name \"usb-redir\"")) - qemuCapsSet(caps, QEMU_CAPS_USB_REDIR); - if (strstr(str, "usb-redir.filter")) - qemuCapsSet(caps, QEMU_CAPS_USB_REDIR_FILTER); - if (strstr(str, "name \"usb-hub\"")) - qemuCapsSet(caps, QEMU_CAPS_USB_HUB); - if (strstr(str, "name \"ich9-ahci\"")) - qemuCapsSet(caps, QEMU_CAPS_ICH9_AHCI); - if (strstr(str, "name \"virtio-blk-s390\"") || - strstr(str, "name \"virtio-net-s390\"") || - strstr(str, "name \"virtio-serial-s390\"")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_S390); - - if (strstr(str, "name \"lsi53c895a\"")) - qemuCapsSet(caps, QEMU_CAPS_SCSI_LSI); - if (strstr(str, "name \"virtio-scsi-pci\"")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_SCSI_PCI); - - /* Prefer -chardev spicevmc (detected earlier) over -device spicevmc */ - if (!qemuCapsGet(caps, QEMU_CAPS_CHARDEV_SPICEVMC) && - strstr(str, "name \"spicevmc\"")) - qemuCapsSet(caps, QEMU_CAPS_DEVICE_SPICEVMC); - - /* Features of given devices. */ - if (strstr(str, "pci-assign.configfd")) - qemuCapsSet(caps, QEMU_CAPS_PCI_CONFIGFD); - if (strstr(str, "virtio-blk-pci.multifunction")) - qemuCapsSet(caps, QEMU_CAPS_PCI_MULTIFUNCTION); - if (strstr(str, "virtio-blk-pci.bootindex")) { - qemuCapsSet(caps, QEMU_CAPS_BOOTINDEX); - if (strstr(str, "pci-assign.bootindex")) - qemuCapsSet(caps, QEMU_CAPS_PCI_BOOTINDEX); - } - if (strstr(str, "virtio-net-pci.tx=")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_TX_ALG); - if (strstr(str, "name \"qxl-vga\"")) - qemuCapsSet(caps, QEMU_CAPS_DEVICE_QXL_VGA); - if (strstr(str, "virtio-blk-pci.ioeventfd")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_IOEVENTFD); - if (strstr(str, "name \"sga\"")) - qemuCapsSet(caps, QEMU_CAPS_SGA); - if (strstr(str, "virtio-blk-pci.event_idx")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_BLK_EVENT_IDX); - if (strstr(str, "virtio-net-pci.event_idx")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_NET_EVENT_IDX); - if (strstr(str, "virtio-blk-pci.scsi")) - qemuCapsSet(caps, QEMU_CAPS_VIRTIO_BLK_SCSI); - if (strstr(str, "scsi-disk.channel")) - qemuCapsSet(caps, QEMU_CAPS_SCSI_DISK_CHANNEL); - if (strstr(str, "scsi-disk.wwn")) - qemuCapsSet(caps, QEMU_CAPS_SCSI_DISK_WWN); - if (strstr(str, "scsi-block")) - qemuCapsSet(caps, QEMU_CAPS_SCSI_BLOCK); - if (strstr(str, "scsi-cd")) - qemuCapsSet(caps, QEMU_CAPS_SCSI_CD); - if (strstr(str, "ide-cd")) - qemuCapsSet(caps, QEMU_CAPS_IDE_CD); - if (strstr(str, "ide-drive.wwn")) - qemuCapsSet(caps, QEMU_CAPS_IDE_DRIVE_WWN); - - /* - * the iolimit detection is not really straight forward: - * in qemu this is a capability of the block layer, if - * present any of -device scsi-disk, virtio-blk-*, ... - * will offer to specify logical and physical block size - * and other properties... - */ - if (strstr(str, ".logical_block_size") && - strstr(str, ".physical_block_size")) - qemuCapsSet(caps, QEMU_CAPS_BLOCKIO); - if (strstr(str, "PIIX4_PM.disable_s3=")) - qemuCapsSet(caps, QEMU_CAPS_DISABLE_S3); - if (strstr(str, "PIIX4_PM.disable_s4=")) - qemuCapsSet(caps, QEMU_CAPS_DISABLE_S4); - - return 0; -} - - static void uname_normalize (struct utsname *ut) { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 109aaf3097..c8207c4495 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -220,8 +220,7 @@ int qemuCapsParseHelpStr(const char *qemu, unsigned int *kvm_version, bool check_yajl); /* Only for use by test suite */ -int qemuCapsParseDeviceStr(const char *str, - qemuCapsPtr caps); +int qemuCapsParseDeviceStr(qemuCapsPtr caps, const char *str); VIR_ENUM_DECL(qemuCaps); diff --git a/tests/qemuhelptest.c b/tests/qemuhelptest.c index 079aef8fd4..681f425b04 100644 --- a/tests/qemuhelptest.c +++ b/tests/qemuhelptest.c @@ -71,7 +71,7 @@ static int testHelpStrParsing(const void *data) if (virtTestLoadFile(path, &help) < 0) goto cleanup; - if (qemuCapsParseDeviceStr(help, flags) < 0) + if (qemuCapsParseDeviceStr(flags, help) < 0) goto cleanup; }