diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index 3424ae5676..12f37cda01 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -1176,3 +1176,300 @@ qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src, virJSONValueFree(fileprops); return ret; } + + +static int +qemuBlockStorageSourceGetFormatRawProps(virStorageSourcePtr src, + virJSONValuePtr props) +{ + qemuDomainStorageSourcePrivatePtr srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(src); + const char *driver = "raw"; + const char *secretalias = NULL; + + if (src->encryption && + src->encryption->format == VIR_STORAGE_ENCRYPTION_FORMAT_LUKS && + srcPriv && + srcPriv->encinfo) { + driver = "luks"; + secretalias = srcPriv->encinfo->s.aes.alias; + } + + /* currently unhandled properties for the 'raw' driver: + * 'offset' + * 'size' + */ + + if (virJSONValueObjectAdd(props, + "s:driver", driver, + "S:key-secret", secretalias, NULL) < 0) + return -1; + + return 0; +} + + +static int +qemuBlockStorageSourceGetCryptoProps(virStorageSourcePtr src, + virJSONValuePtr *encprops) +{ + qemuDomainStorageSourcePrivatePtr srcpriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(src); + const char *encformat = NULL; + + *encprops = NULL; + + /* qemu requires encrypted secrets regardless of encryption method used when + * passed using the blockdev infrastructure, thus only + * VIR_DOMAIN_SECRET_INFO_TYPE_AES works here. The correct type needs to be + * instantiated elsewhere. */ + if (!src->encryption || + !srcpriv || + !srcpriv->encinfo || + srcpriv->encinfo->type != VIR_DOMAIN_SECRET_INFO_TYPE_AES) + return 0; + + switch ((virStorageEncryptionFormatType) src->encryption->format) { + case VIR_STORAGE_ENCRYPTION_FORMAT_QCOW: + encformat = "aes"; + break; + + case VIR_STORAGE_ENCRYPTION_FORMAT_LUKS: + encformat = "luks"; + break; + + case VIR_STORAGE_ENCRYPTION_FORMAT_DEFAULT: + case VIR_STORAGE_ENCRYPTION_FORMAT_LAST: + default: + virReportEnumRangeError(virStorageEncryptionFormatType, + src->encryption->format); + return -1; + } + + return virJSONValueObjectCreate(encprops, + "s:format", encformat, + "s:key-secret", srcpriv->encinfo->s.aes.alias, + NULL); +} + + +static int +qemuBlockStorageSourceGetFormatQcowGenericProps(virStorageSourcePtr src, + const char *format, + virJSONValuePtr props) +{ + virJSONValuePtr encprops = NULL; + int ret = -1; + + if (qemuBlockStorageSourceGetCryptoProps(src, &encprops) < 0) + return -1; + + if (virJSONValueObjectAdd(props, + "s:driver", format, + "A:encrypt", &encprops, NULL) < 0) + goto cleanup; + + ret = 0; + + cleanup: + virJSONValueFree(encprops); + return ret; +} + + +static int +qemuBlockStorageSourceGetFormatQcow2Props(virStorageSourcePtr src, + virJSONValuePtr props) +{ + /* currently unhandled qcow2 props: + * + * 'lazy-refcounts' + * 'pass-discard-request' + * 'pass-discard-snapshot' + * 'pass-discard-other' + * 'overlap-check' + * 'l2-cache-size' + * 'l2-cache-entry-size' + * 'refcount-cache-size' + * 'cache-clean-interval' + */ + + if (qemuBlockStorageSourceGetFormatQcowGenericProps(src, "qcow2", props) < 0) + return -1; + + return 0; +} + + +static virJSONValuePtr +qemuBlockStorageSourceGetBlockdevFormatCommonProps(virStorageSourcePtr src) +{ + const char *detectZeroes = NULL; + const char *discard = NULL; + int detectZeroesMode = virDomainDiskGetDetectZeroesMode(src->discard, + src->detect_zeroes); + virJSONValuePtr props = NULL; + virJSONValuePtr ret = NULL; + + if (qemuBlockNodeNameValidate(src->nodeformat) < 0) + return NULL; + + if (src->discard) + discard = virDomainDiskDiscardTypeToString(src->discard); + + if (detectZeroesMode) + detectZeroes = virDomainDiskDetectZeroesTypeToString(detectZeroesMode); + + /* currently unhandled global properties: + * '*force-share': 'bool' + */ + + if (virJSONValueObjectCreate(&props, + "s:node-name", src->nodeformat, + "b:read-only", src->readonly, + "S:discard", discard, + "S:detect-zeroes", detectZeroes, + NULL) < 0) + return NULL; + + if (qemuBlockStorageSourceGetBlockdevGetCacheProps(src, props) < 0) + goto cleanup; + + VIR_STEAL_PTR(ret, props); + + cleanup: + virJSONValueFree(props); + return ret; +} + + +static virJSONValuePtr +qemuBlockStorageSourceGetBlockdevFormatProps(virStorageSourcePtr src) +{ + const char *driver = NULL; + virJSONValuePtr props = NULL; + virJSONValuePtr ret = NULL; + + if (!(props = qemuBlockStorageSourceGetBlockdevFormatCommonProps(src))) + goto cleanup; + + switch ((virStorageFileFormat) src->format) { + case VIR_STORAGE_FILE_FAT: + /* The fat layer is emulated by the storage access layer, so we need to + * put a raw layer on top */ + case VIR_STORAGE_FILE_RAW: + if (qemuBlockStorageSourceGetFormatRawProps(src, props) < 0) + goto cleanup; + break; + + case VIR_STORAGE_FILE_QCOW2: + if (qemuBlockStorageSourceGetFormatQcow2Props(src, props) < 0) + goto cleanup; + break; + + case VIR_STORAGE_FILE_QCOW: + if (qemuBlockStorageSourceGetFormatQcowGenericProps(src, "qcow", props) < 0) + goto cleanup; + break; + + /* formats without any special parameters */ + case VIR_STORAGE_FILE_PLOOP: + driver = "parallels"; + break; + + case VIR_STORAGE_FILE_VHD: + driver = "vhdx"; + break; + + case VIR_STORAGE_FILE_BOCHS: + case VIR_STORAGE_FILE_CLOOP: + case VIR_STORAGE_FILE_DMG: + case VIR_STORAGE_FILE_VDI: + case VIR_STORAGE_FILE_VPC: + case VIR_STORAGE_FILE_QED: + case VIR_STORAGE_FILE_VMDK: + driver = virStorageFileFormatTypeToString(src->format); + break; + + case VIR_STORAGE_FILE_AUTO_SAFE: + case VIR_STORAGE_FILE_AUTO: + case VIR_STORAGE_FILE_NONE: + case VIR_STORAGE_FILE_COW: + case VIR_STORAGE_FILE_ISO: + case VIR_STORAGE_FILE_DIR: + virReportError(VIR_ERR_INTERNAL_ERROR, + _("mishandled storage format '%s'"), + virStorageFileFormatTypeToString(src->format)); + goto cleanup; + + case VIR_STORAGE_FILE_LAST: + default: + virReportEnumRangeError(virStorageFileFormat, src->format); + goto cleanup; + } + + if (driver && + virJSONValueObjectAdd(props, "s:driver", driver, NULL) < 0) + goto cleanup; + + VIR_STEAL_PTR(ret, props); + + cleanup: + virJSONValueFree(props); + + return ret; +} + + +/** + * qemuBlockStorageSourceGetBlockdevProps: + * + * @src: storage source to format + * + * Formats @src into a JSON object which can be used with blockdev-add or + * -blockdev. The formatted object contains both the storage and format layer + * in nested form including link to the backing chain layer if necessary. + */ +virJSONValuePtr +qemuBlockStorageSourceGetBlockdevProps(virStorageSourcePtr src) +{ + bool backingSupported = src->format >= VIR_STORAGE_FILE_BACKING; + virJSONValuePtr storage = NULL; + virJSONValuePtr props = NULL; + virJSONValuePtr ret = NULL; + + if (virStorageSourceHasBacking(src) && !backingSupported) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("storage format '%s' does not support backing store"), + virStorageFileFormatTypeToString(src->format)); + goto cleanup; + } + + if (!(props = qemuBlockStorageSourceGetBlockdevFormatProps(src))) + goto cleanup; + + if (!(storage = qemuBlockStorageSourceGetBackendProps(src, false))) + goto cleanup; + + if (virJSONValueObjectAppend(props, "file", storage) < 0) + goto cleanup; + storage = NULL; + + if (src->backingStore && backingSupported) { + if (virStorageSourceHasBacking(src)) { + if (virJSONValueObjectAppendString(props, "backing", + src->backingStore->nodeformat) < 0) + goto cleanup; + } else { + /* chain is terminated, indicate that no detection should happen + * in qemu */ + if (virJSONValueObjectAppendNull(props, "backing") < 0) + goto cleanup; + } + } + + VIR_STEAL_PTR(ret, props); + + cleanup: + virJSONValueFree(storage); + virJSONValueFree(props); + return ret; +} diff --git a/src/qemu/qemu_block.h b/src/qemu/qemu_block.h index 0e674437f4..f819c6f907 100644 --- a/src/qemu/qemu_block.h +++ b/src/qemu/qemu_block.h @@ -64,4 +64,7 @@ qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src, virURIPtr qemuBlockStorageSourceGetURI(virStorageSourcePtr src); +virJSONValuePtr +qemuBlockStorageSourceGetBlockdevProps(virStorageSourcePtr src); + #endif /* __QEMU_BLOCK_H__ */