This patch is used to add dump_memory_format to qemu.conf and make the specified format as the default dump format of 'virsh dump --memory-only'. But when "--compress" is specified with dump command, the format configured by dump_memory_format will be overrided. dump_memory_format can one of elf, kdump-zlib, kdump-lzo and kdump-snappy. And elf is the default value. Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com> --- src/qemu/libvirtd_qemu.aug | 1 + src/qemu/qemu.conf | 6 ++++++ src/qemu/qemu_conf.c | 2 ++ src/qemu/qemu_conf.h | 1 + src/qemu/qemu_driver.c | 37 ++++++++++++++++++++++++++++++++++--- src/qemu/test_libvirtd_qemu.aug.in | 1 + 6 files changed, 45 insertions(+), 3 deletions(-) diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug index a9ff421..25737e8 100644 --- a/src/qemu/libvirtd_qemu.aug +++ b/src/qemu/libvirtd_qemu.aug @@ -60,6 +60,7 @@ module Libvirtd_qemu = let save_entry = str_entry "save_image_format" | str_entry "dump_image_format" + | str_entry "dump_memory_format" | str_entry "snapshot_image_format" | str_entry "auto_dump_path" | bool_entry "auto_dump_bypass_cache" diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf index 17f1b10..8dc9d29 100644 --- a/src/qemu/qemu.conf +++ b/src/qemu/qemu.conf @@ -294,6 +294,11 @@ # the requested compression program can't be found, this falls # back to "raw" compression. # +# dump_memory_format is used when you use 'virsh dump --memory-only' to dump +# guest memory, and if specifing format with 'virsh dump --memory-only', +# dump_memory_format will not work. dump_memory_format can be elf, kdump-zlib, +# kdump-lzo and kdump-snappy. +# # snapshot_image_format specifies the compression algorithm of the memory save # image when an external snapshot of a domain is taken. This does not apply # on disk image format. It is an error if the specified format isn't valid, @@ -301,6 +306,7 @@ # #save_image_format = "raw" #dump_image_format = "raw" +#dump_memory_format = "elf" #snapshot_image_format = "raw" # When a domain is configured to be auto-dumped when libvirtd receives a diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 4378791..7893e31 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -296,6 +296,7 @@ static void virQEMUDriverConfigDispose(void *obj) VIR_FREE(cfg->saveImageFormat); VIR_FREE(cfg->dumpImageFormat); + VIR_FREE(cfg->dumpMemoryFormat); VIR_FREE(cfg->autoDumpPath); virStringFreeList(cfg->securityDriverNames); @@ -546,6 +547,7 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg, GET_VALUE_STR("save_image_format", cfg->saveImageFormat); GET_VALUE_STR("dump_image_format", cfg->dumpImageFormat); + GET_VALUE_STR("dump_memory_format", cfg->dumpMemoryFormat); GET_VALUE_STR("snapshot_image_format", cfg->snapshotImageFormat); GET_VALUE_STR("auto_dump_path", cfg->autoDumpPath); diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h index 1f44a76..3bb1935 100644 --- a/src/qemu/qemu_conf.h +++ b/src/qemu/qemu_conf.h @@ -147,6 +147,7 @@ struct _virQEMUDriverConfig { char *saveImageFormat; char *dumpImageFormat; + char *dumpMemoryFormat; char *snapshotImageFormat; char *autoDumpPath; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index c4e1aef..06f39c0 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -3407,6 +3407,21 @@ static int qemuDumpToFd(virQEMUDriverPtr driver, virDomainObjPtr vm, return ret; } +typedef enum { + QEMU_DUMP_MEMORY_FORMAT_ELF = 0, + QEMU_DUMP_MEMORY_FORMAT_KDUMP_ZLIB = 1, + QEMU_DUMP_MEMORY_FORMAT_KDUMP_LZO = 2, + QEMU_DUMP_MEMORY_FORMAT_KDUMP_SNAPPY = 3, + QEMU_DUMP_MEMORY_FORMAT_LAST +} virQEMUDumpMemoryFormat; + +VIR_ENUM_DECL(qemuDumpMemoryCompression) +VIR_ENUM_IMPL(qemuDumpMemoryCompression, QEMU_DUMP_MEMORY_FORMAT_LAST, + "elf", + "kdump-zlib", + "kdump-lzo", + "kdump-snappy") + static int doCoreDump(virQEMUDriverPtr driver, virDomainObjPtr vm, @@ -3419,7 +3434,9 @@ doCoreDump(virQEMUDriverPtr driver, virFileWrapperFdPtr wrapperFd = NULL; int directFlag = 0; unsigned int flags = VIR_FILE_WRAPPER_NON_BLOCKING; - const char *dump_format; + const char *dump_format = "elf"; + virQEMUDriverConfigPtr cfg = NULL; + int dump_memory_format; /* Create an empty file with appropriate ownership. */ if (dump_flags & VIR_DUMP_BYPASS_CACHE) { @@ -3449,8 +3466,22 @@ doCoreDump(virQEMUDriverPtr driver, dump_format = "kdump-lzo"; else if (dump_flags & VIR_DUMP_COMPRESS_SNAPPY) dump_format = "kdump-snappy"; - else - dump_format = "elf"; + else { + /* when --compress option is specified, qemu.conf will not work */ + cfg = virQEMUDriverGetConfig(driver); + if (cfg->dumpMemoryFormat) { + dump_memory_format = qemuDumpMemoryCompressionTypeFromString( + cfg->dumpMemoryFormat); + if (dump_memory_format == QEMU_DUMP_MEMORY_FORMAT_KDUMP_ZLIB) + dump_format = "kdump-zlib"; + else if (dump_memory_format == + QEMU_DUMP_MEMORY_FORMAT_KDUMP_LZO) + dump_format = "kdump-lzo"; + else if (dump_memory_format == + QEMU_DUMP_MEMORY_FORMAT_KDUMP_SNAPPY) + dump_format = "kdump-snappy"; + } + } ret = qemuDumpToFd(driver, vm, fd, QEMU_ASYNC_JOB_DUMP, dump_format); } else { diff --git a/src/qemu/test_libvirtd_qemu.aug.in b/src/qemu/test_libvirtd_qemu.aug.in index 81fedd6..9d0bcec 100644 --- a/src/qemu/test_libvirtd_qemu.aug.in +++ b/src/qemu/test_libvirtd_qemu.aug.in @@ -51,6 +51,7 @@ module Test_libvirtd_qemu = } { "save_image_format" = "raw" } { "dump_image_format" = "raw" } +{ "dump_memory_format" = "elf" } { "snapshot_image_format" = "raw" } { "auto_dump_path" = "/var/lib/libvirt/qemu/dump" } { "auto_dump_bypass_cache" = "0" } -- 1.8.3.1