5441 lines
159 KiB
C
5441 lines
159 KiB
C
/*
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* QEMU disk image utility
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include <getopt.h>
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#include "qemu-common.h"
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#include "qemu-version.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-block-core.h"
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#include "qapi/qapi-visit-block-core.h"
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#include "qapi/qobject-output-visitor.h"
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#include "qapi/qmp/qjson.h"
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#include "qapi/qmp/qdict.h"
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#include "qemu/cutils.h"
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#include "qemu/config-file.h"
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#include "qemu/option.h"
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#include "qemu/error-report.h"
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#include "qemu/log.h"
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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#include "qemu/sockets.h"
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#include "qemu/units.h"
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#include "qom/object_interfaces.h"
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#include "sysemu/block-backend.h"
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#include "block/block_int.h"
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#include "block/blockjob.h"
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#include "block/qapi.h"
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#include "crypto/init.h"
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#include "trace/control.h"
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#include "qemu/throttle.h"
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#include "block/throttle-groups.h"
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#define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \
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"\n" QEMU_COPYRIGHT "\n"
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typedef struct img_cmd_t {
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const char *name;
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int (*handler)(int argc, char **argv);
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} img_cmd_t;
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enum {
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OPTION_OUTPUT = 256,
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OPTION_BACKING_CHAIN = 257,
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OPTION_OBJECT = 258,
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OPTION_IMAGE_OPTS = 259,
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OPTION_PATTERN = 260,
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OPTION_FLUSH_INTERVAL = 261,
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OPTION_NO_DRAIN = 262,
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OPTION_TARGET_IMAGE_OPTS = 263,
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OPTION_SIZE = 264,
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OPTION_PREALLOCATION = 265,
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OPTION_SHRINK = 266,
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OPTION_SALVAGE = 267,
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OPTION_TARGET_IS_ZERO = 268,
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OPTION_ADD = 269,
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OPTION_REMOVE = 270,
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OPTION_CLEAR = 271,
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OPTION_ENABLE = 272,
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OPTION_DISABLE = 273,
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OPTION_MERGE = 274,
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OPTION_BITMAPS = 275,
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OPTION_FORCE = 276,
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OPTION_SKIP_BROKEN = 277,
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};
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typedef enum OutputFormat {
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OFORMAT_JSON,
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OFORMAT_HUMAN,
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} OutputFormat;
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/* Default to cache=writeback as data integrity is not important for qemu-img */
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#define BDRV_DEFAULT_CACHE "writeback"
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static void format_print(void *opaque, const char *name)
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{
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printf(" %s", name);
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}
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static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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error_vreport(fmt, ap);
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va_end(ap);
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error_printf("Try 'qemu-img --help' for more information\n");
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exit(EXIT_FAILURE);
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}
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static void QEMU_NORETURN missing_argument(const char *option)
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{
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error_exit("missing argument for option '%s'", option);
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}
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static void QEMU_NORETURN unrecognized_option(const char *option)
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{
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error_exit("unrecognized option '%s'", option);
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}
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/* Please keep in synch with docs/tools/qemu-img.rst */
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static void QEMU_NORETURN help(void)
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{
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const char *help_msg =
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QEMU_IMG_VERSION
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"usage: qemu-img [standard options] command [command options]\n"
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"QEMU disk image utility\n"
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"\n"
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" '-h', '--help' display this help and exit\n"
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" '-V', '--version' output version information and exit\n"
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" '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
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" specify tracing options\n"
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"\n"
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"Command syntax:\n"
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#define DEF(option, callback, arg_string) \
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" " arg_string "\n"
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#include "qemu-img-cmds.h"
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#undef DEF
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"\n"
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"Command parameters:\n"
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" 'filename' is a disk image filename\n"
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" 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n"
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" manual page for a description of the object properties. The most common\n"
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" object type is a 'secret', which is used to supply passwords and/or\n"
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" encryption keys.\n"
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" 'fmt' is the disk image format. It is guessed automatically in most cases\n"
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" 'cache' is the cache mode used to write the output disk image, the valid\n"
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" options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
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" 'directsync' and 'unsafe' (default for convert)\n"
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" 'src_cache' is the cache mode used to read input disk images, the valid\n"
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" options are the same as for the 'cache' option\n"
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" 'size' is the disk image size in bytes. Optional suffixes\n"
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" 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
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" 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
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" supported. 'b' is ignored.\n"
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" 'output_filename' is the destination disk image filename\n"
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" 'output_fmt' is the destination format\n"
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" 'options' is a comma separated list of format specific options in a\n"
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" name=value format. Use -o ? for an overview of the options supported by the\n"
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" used format\n"
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" 'snapshot_param' is param used for internal snapshot, format\n"
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" is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
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" '[ID_OR_NAME]'\n"
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" '-c' indicates that target image must be compressed (qcow format only)\n"
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" '-u' allows unsafe backing chains. For rebasing, it is assumed that old and\n"
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" new backing file match exactly. The image doesn't need a working\n"
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" backing file before rebasing in this case (useful for renaming the\n"
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" backing file). For image creation, allow creating without attempting\n"
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" to open the backing file.\n"
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" '-h' with or without a command shows this help and lists the supported formats\n"
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" '-p' show progress of command (only certain commands)\n"
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" '-q' use Quiet mode - do not print any output (except errors)\n"
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" '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
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" contain only zeros for qemu-img to create a sparse image during\n"
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" conversion. If the number of bytes is 0, the source will not be scanned for\n"
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" unallocated or zero sectors, and the destination image will always be\n"
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" fully allocated\n"
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" '--output' takes the format in which the output must be done (human or json)\n"
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" '-n' skips the target volume creation (useful if the volume is created\n"
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" prior to running qemu-img)\n"
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"\n"
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"Parameters to bitmap subcommand:\n"
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" 'bitmap' is the name of the bitmap to manipulate, through one or more\n"
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" actions from '--add', '--remove', '--clear', '--enable', '--disable',\n"
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" or '--merge source'\n"
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" '-g granularity' sets the granularity for '--add' actions\n"
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" '-b source' and '-F src_fmt' tell '--merge' actions to find the source\n"
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" bitmaps from an alternative file\n"
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"\n"
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"Parameters to check subcommand:\n"
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" '-r' tries to repair any inconsistencies that are found during the check.\n"
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" '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
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" kinds of errors, with a higher risk of choosing the wrong fix or\n"
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" hiding corruption that has already occurred.\n"
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"\n"
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"Parameters to convert subcommand:\n"
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" '--bitmaps' copies all top-level persistent bitmaps to destination\n"
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" '-m' specifies how many coroutines work in parallel during the convert\n"
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" process (defaults to 8)\n"
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" '-W' allow to write to the target out of order rather than sequential\n"
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"\n"
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"Parameters to snapshot subcommand:\n"
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" 'snapshot' is the name of the snapshot to create, apply or delete\n"
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" '-a' applies a snapshot (revert disk to saved state)\n"
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" '-c' creates a snapshot\n"
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" '-d' deletes a snapshot\n"
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" '-l' lists all snapshots in the given image\n"
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"\n"
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"Parameters to compare subcommand:\n"
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" '-f' first image format\n"
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" '-F' second image format\n"
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" '-s' run in Strict mode - fail on different image size or sector allocation\n"
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"\n"
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"Parameters to dd subcommand:\n"
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" 'bs=BYTES' read and write up to BYTES bytes at a time "
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"(default: 512)\n"
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" 'count=N' copy only N input blocks\n"
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" 'if=FILE' read from FILE\n"
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" 'of=FILE' write to FILE\n"
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" 'skip=N' skip N bs-sized blocks at the start of input\n";
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printf("%s\nSupported formats:", help_msg);
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bdrv_iterate_format(format_print, NULL, false);
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printf("\n\n" QEMU_HELP_BOTTOM "\n");
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exit(EXIT_SUCCESS);
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}
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/*
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* Is @optarg safe for accumulate_options()?
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* It is when multiple of them can be joined together separated by ','.
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* To make that work, @optarg must not start with ',' (or else a
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* separating ',' preceding it gets escaped), and it must not end with
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* an odd number of ',' (or else a separating ',' following it gets
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* escaped), or be empty (or else a separating ',' preceding it can
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* escape a separating ',' following it).
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*
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*/
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static bool is_valid_option_list(const char *optarg)
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{
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size_t len = strlen(optarg);
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size_t i;
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if (!optarg[0] || optarg[0] == ',') {
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return false;
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}
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for (i = len; i > 0 && optarg[i - 1] == ','; i--) {
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}
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if ((len - i) % 2) {
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return false;
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}
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return true;
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}
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static int accumulate_options(char **options, char *optarg)
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{
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char *new_options;
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if (!is_valid_option_list(optarg)) {
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error_report("Invalid option list: %s", optarg);
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return -1;
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}
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if (!*options) {
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*options = g_strdup(optarg);
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} else {
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new_options = g_strdup_printf("%s,%s", *options, optarg);
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g_free(*options);
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*options = new_options;
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}
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return 0;
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}
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static QemuOptsList qemu_source_opts = {
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.name = "source",
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.implied_opt_name = "file",
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.head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head),
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.desc = {
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{ }
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},
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};
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static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
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{
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int ret = 0;
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if (!quiet) {
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va_list args;
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va_start(args, fmt);
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ret = vprintf(fmt, args);
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va_end(args);
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}
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return ret;
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}
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static int print_block_option_help(const char *filename, const char *fmt)
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{
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BlockDriver *drv, *proto_drv;
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QemuOptsList *create_opts = NULL;
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Error *local_err = NULL;
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt);
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if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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return 1;
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}
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if (!drv->create_opts) {
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error_report("Format driver '%s' does not support image creation", fmt);
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return 1;
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}
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create_opts = qemu_opts_append(create_opts, drv->create_opts);
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if (filename) {
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proto_drv = bdrv_find_protocol(filename, true, &local_err);
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if (!proto_drv) {
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error_report_err(local_err);
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qemu_opts_free(create_opts);
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return 1;
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}
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if (!proto_drv->create_opts) {
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error_report("Protocol driver '%s' does not support image creation",
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proto_drv->format_name);
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qemu_opts_free(create_opts);
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return 1;
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}
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create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
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}
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if (filename) {
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printf("Supported options:\n");
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} else {
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printf("Supported %s options:\n", fmt);
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}
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qemu_opts_print_help(create_opts, false);
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qemu_opts_free(create_opts);
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if (!filename) {
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printf("\n"
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"The protocol level may support further options.\n"
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"Specify the target filename to include those options.\n");
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}
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return 0;
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}
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static BlockBackend *img_open_opts(const char *optstr,
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QemuOpts *opts, int flags, bool writethrough,
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bool quiet, bool force_share)
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{
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QDict *options;
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Error *local_err = NULL;
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BlockBackend *blk;
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options = qemu_opts_to_qdict(opts, NULL);
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if (force_share) {
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if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE)
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&& strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) {
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error_report("--force-share/-U conflicts with image options");
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qobject_unref(options);
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return NULL;
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}
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qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on");
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}
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blk = blk_new_open(NULL, NULL, options, flags, &local_err);
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if (!blk) {
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error_reportf_err(local_err, "Could not open '%s': ", optstr);
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return NULL;
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}
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blk_set_enable_write_cache(blk, !writethrough);
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return blk;
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}
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static BlockBackend *img_open_file(const char *filename,
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QDict *options,
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const char *fmt, int flags,
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bool writethrough, bool quiet,
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bool force_share)
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{
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BlockBackend *blk;
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Error *local_err = NULL;
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|
|
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if (!options) {
|
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options = qdict_new();
|
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}
|
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if (fmt) {
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qdict_put_str(options, "driver", fmt);
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}
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|
|
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if (force_share) {
|
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qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
|
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}
|
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blk = blk_new_open(filename, NULL, options, flags, &local_err);
|
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if (!blk) {
|
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error_reportf_err(local_err, "Could not open '%s': ", filename);
|
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return NULL;
|
|
}
|
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blk_set_enable_write_cache(blk, !writethrough);
|
|
|
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return blk;
|
|
}
|
|
|
|
|
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static int img_add_key_secrets(void *opaque,
|
|
const char *name, const char *value,
|
|
Error **errp)
|
|
{
|
|
QDict *options = opaque;
|
|
|
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if (g_str_has_suffix(name, "key-secret")) {
|
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qdict_put_str(options, name, value);
|
|
}
|
|
|
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return 0;
|
|
}
|
|
|
|
|
|
static BlockBackend *img_open(bool image_opts,
|
|
const char *filename,
|
|
const char *fmt, int flags, bool writethrough,
|
|
bool quiet, bool force_share)
|
|
{
|
|
BlockBackend *blk;
|
|
if (image_opts) {
|
|
QemuOpts *opts;
|
|
if (fmt) {
|
|
error_report("--image-opts and --format are mutually exclusive");
|
|
return NULL;
|
|
}
|
|
opts = qemu_opts_parse_noisily(qemu_find_opts("source"),
|
|
filename, true);
|
|
if (!opts) {
|
|
return NULL;
|
|
}
|
|
blk = img_open_opts(filename, opts, flags, writethrough, quiet,
|
|
force_share);
|
|
} else {
|
|
blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet,
|
|
force_share);
|
|
}
|
|
return blk;
|
|
}
|
|
|
|
|
|
static int add_old_style_options(const char *fmt, QemuOpts *opts,
|
|
const char *base_filename,
|
|
const char *base_fmt)
|
|
{
|
|
if (base_filename) {
|
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if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename,
|
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NULL)) {
|
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error_report("Backing file not supported for file format '%s'",
|
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fmt);
|
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return -1;
|
|
}
|
|
}
|
|
if (base_fmt) {
|
|
if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, NULL)) {
|
|
error_report("Backing file format not supported for file "
|
|
"format '%s'", fmt);
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int64_t cvtnum_full(const char *name, const char *value, int64_t min,
|
|
int64_t max)
|
|
{
|
|
int err;
|
|
uint64_t res;
|
|
|
|
err = qemu_strtosz(value, NULL, &res);
|
|
if (err < 0 && err != -ERANGE) {
|
|
error_report("Invalid %s specified. You may use "
|
|
"k, M, G, T, P or E suffixes for", name);
|
|
error_report("kilobytes, megabytes, gigabytes, terabytes, "
|
|
"petabytes and exabytes.");
|
|
return err;
|
|
}
|
|
if (err == -ERANGE || res > max || res < min) {
|
|
error_report("Invalid %s specified. Must be between %" PRId64
|
|
" and %" PRId64 ".", name, min, max);
|
|
return -ERANGE;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int64_t cvtnum(const char *name, const char *value)
|
|
{
|
|
return cvtnum_full(name, value, 0, INT64_MAX);
|
|
}
|
|
|
|
static int img_create(int argc, char **argv)
|
|
{
|
|
int c;
|
|
uint64_t img_size = -1;
|
|
const char *fmt = "raw";
|
|
const char *base_fmt = NULL;
|
|
const char *filename;
|
|
const char *base_filename = NULL;
|
|
char *options = NULL;
|
|
Error *local_err = NULL;
|
|
bool quiet = false;
|
|
int flags = 0;
|
|
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":F:b:f:ho:qu",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'F':
|
|
base_fmt = optarg;
|
|
break;
|
|
case 'b':
|
|
base_filename = optarg;
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'o':
|
|
if (accumulate_options(&options, optarg) < 0) {
|
|
goto fail;
|
|
}
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 'u':
|
|
flags |= BDRV_O_NO_BACKING;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Get the filename */
|
|
filename = (optind < argc) ? argv[optind] : NULL;
|
|
if (options && has_help_option(options)) {
|
|
g_free(options);
|
|
return print_block_option_help(filename, fmt);
|
|
}
|
|
|
|
if (optind >= argc) {
|
|
error_exit("Expecting image file name");
|
|
}
|
|
optind++;
|
|
|
|
/* Get image size, if specified */
|
|
if (optind < argc) {
|
|
int64_t sval;
|
|
|
|
sval = cvtnum("image size", argv[optind++]);
|
|
if (sval < 0) {
|
|
goto fail;
|
|
}
|
|
img_size = (uint64_t)sval;
|
|
}
|
|
if (optind != argc) {
|
|
error_exit("Unexpected argument: %s", argv[optind]);
|
|
}
|
|
|
|
bdrv_img_create(filename, fmt, base_filename, base_fmt,
|
|
options, img_size, flags, quiet, &local_err);
|
|
if (local_err) {
|
|
error_reportf_err(local_err, "%s: ", filename);
|
|
goto fail;
|
|
}
|
|
|
|
g_free(options);
|
|
return 0;
|
|
|
|
fail:
|
|
g_free(options);
|
|
return 1;
|
|
}
|
|
|
|
static void dump_json_image_check(ImageCheck *check, bool quiet)
|
|
{
|
|
GString *str;
|
|
QObject *obj;
|
|
Visitor *v = qobject_output_visitor_new(&obj);
|
|
|
|
visit_type_ImageCheck(v, NULL, &check, &error_abort);
|
|
visit_complete(v, &obj);
|
|
str = qobject_to_json_pretty(obj, true);
|
|
assert(str != NULL);
|
|
qprintf(quiet, "%s\n", str->str);
|
|
qobject_unref(obj);
|
|
visit_free(v);
|
|
g_string_free(str, true);
|
|
}
|
|
|
|
static void dump_human_image_check(ImageCheck *check, bool quiet)
|
|
{
|
|
if (!(check->corruptions || check->leaks || check->check_errors)) {
|
|
qprintf(quiet, "No errors were found on the image.\n");
|
|
} else {
|
|
if (check->corruptions) {
|
|
qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n"
|
|
"Data may be corrupted, or further writes to the image "
|
|
"may corrupt it.\n",
|
|
check->corruptions);
|
|
}
|
|
|
|
if (check->leaks) {
|
|
qprintf(quiet,
|
|
"\n%" PRId64 " leaked clusters were found on the image.\n"
|
|
"This means waste of disk space, but no harm to data.\n",
|
|
check->leaks);
|
|
}
|
|
|
|
if (check->check_errors) {
|
|
qprintf(quiet,
|
|
"\n%" PRId64
|
|
" internal errors have occurred during the check.\n",
|
|
check->check_errors);
|
|
}
|
|
}
|
|
|
|
if (check->total_clusters != 0 && check->allocated_clusters != 0) {
|
|
qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, "
|
|
"%0.2f%% fragmented, %0.2f%% compressed clusters\n",
|
|
check->allocated_clusters, check->total_clusters,
|
|
check->allocated_clusters * 100.0 / check->total_clusters,
|
|
check->fragmented_clusters * 100.0 / check->allocated_clusters,
|
|
check->compressed_clusters * 100.0 /
|
|
check->allocated_clusters);
|
|
}
|
|
|
|
if (check->image_end_offset) {
|
|
qprintf(quiet,
|
|
"Image end offset: %" PRId64 "\n", check->image_end_offset);
|
|
}
|
|
}
|
|
|
|
static int collect_image_check(BlockDriverState *bs,
|
|
ImageCheck *check,
|
|
const char *filename,
|
|
const char *fmt,
|
|
int fix)
|
|
{
|
|
int ret;
|
|
BdrvCheckResult result;
|
|
|
|
ret = bdrv_check(bs, &result, fix);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
check->filename = g_strdup(filename);
|
|
check->format = g_strdup(bdrv_get_format_name(bs));
|
|
check->check_errors = result.check_errors;
|
|
check->corruptions = result.corruptions;
|
|
check->has_corruptions = result.corruptions != 0;
|
|
check->leaks = result.leaks;
|
|
check->has_leaks = result.leaks != 0;
|
|
check->corruptions_fixed = result.corruptions_fixed;
|
|
check->has_corruptions_fixed = result.corruptions_fixed != 0;
|
|
check->leaks_fixed = result.leaks_fixed;
|
|
check->has_leaks_fixed = result.leaks_fixed != 0;
|
|
check->image_end_offset = result.image_end_offset;
|
|
check->has_image_end_offset = result.image_end_offset != 0;
|
|
check->total_clusters = result.bfi.total_clusters;
|
|
check->has_total_clusters = result.bfi.total_clusters != 0;
|
|
check->allocated_clusters = result.bfi.allocated_clusters;
|
|
check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
|
|
check->fragmented_clusters = result.bfi.fragmented_clusters;
|
|
check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
|
|
check->compressed_clusters = result.bfi.compressed_clusters;
|
|
check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Checks an image for consistency. Exit codes:
|
|
*
|
|
* 0 - Check completed, image is good
|
|
* 1 - Check not completed because of internal errors
|
|
* 2 - Check completed, image is corrupted
|
|
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
|
* 63 - Checks are not supported by the image format
|
|
*/
|
|
static int img_check(int argc, char **argv)
|
|
{
|
|
int c, ret;
|
|
OutputFormat output_format = OFORMAT_HUMAN;
|
|
const char *filename, *fmt, *output, *cache;
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
int fix = 0;
|
|
int flags = BDRV_O_CHECK;
|
|
bool writethrough;
|
|
ImageCheck *check;
|
|
bool quiet = false;
|
|
bool image_opts = false;
|
|
bool force_share = false;
|
|
|
|
fmt = NULL;
|
|
output = NULL;
|
|
cache = BDRV_DEFAULT_CACHE;
|
|
|
|
for(;;) {
|
|
int option_index = 0;
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"format", required_argument, 0, 'f'},
|
|
{"repair", required_argument, 0, 'r'},
|
|
{"output", required_argument, 0, OPTION_OUTPUT},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":hf:r:T:qU",
|
|
long_options, &option_index);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'r':
|
|
flags |= BDRV_O_RDWR;
|
|
|
|
if (!strcmp(optarg, "leaks")) {
|
|
fix = BDRV_FIX_LEAKS;
|
|
} else if (!strcmp(optarg, "all")) {
|
|
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
|
|
} else {
|
|
error_exit("Unknown option value for -r "
|
|
"(expecting 'leaks' or 'all'): %s", optarg);
|
|
}
|
|
break;
|
|
case OPTION_OUTPUT:
|
|
output = optarg;
|
|
break;
|
|
case 'T':
|
|
cache = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
if (output && !strcmp(output, "json")) {
|
|
output_format = OFORMAT_JSON;
|
|
} else if (output && !strcmp(output, "human")) {
|
|
output_format = OFORMAT_HUMAN;
|
|
} else if (output) {
|
|
error_report("--output must be used with human or json as argument.");
|
|
return 1;
|
|
}
|
|
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid source cache option: %s", cache);
|
|
return 1;
|
|
}
|
|
|
|
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
|
force_share);
|
|
if (!blk) {
|
|
return 1;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
check = g_new0(ImageCheck, 1);
|
|
ret = collect_image_check(bs, check, filename, fmt, fix);
|
|
|
|
if (ret == -ENOTSUP) {
|
|
error_report("This image format does not support checks");
|
|
ret = 63;
|
|
goto fail;
|
|
}
|
|
|
|
if (check->corruptions_fixed || check->leaks_fixed) {
|
|
int corruptions_fixed, leaks_fixed;
|
|
bool has_leaks_fixed, has_corruptions_fixed;
|
|
|
|
leaks_fixed = check->leaks_fixed;
|
|
has_leaks_fixed = check->has_leaks_fixed;
|
|
corruptions_fixed = check->corruptions_fixed;
|
|
has_corruptions_fixed = check->has_corruptions_fixed;
|
|
|
|
if (output_format == OFORMAT_HUMAN) {
|
|
qprintf(quiet,
|
|
"The following inconsistencies were found and repaired:\n\n"
|
|
" %" PRId64 " leaked clusters\n"
|
|
" %" PRId64 " corruptions\n\n"
|
|
"Double checking the fixed image now...\n",
|
|
check->leaks_fixed,
|
|
check->corruptions_fixed);
|
|
}
|
|
|
|
qapi_free_ImageCheck(check);
|
|
check = g_new0(ImageCheck, 1);
|
|
ret = collect_image_check(bs, check, filename, fmt, 0);
|
|
|
|
check->leaks_fixed = leaks_fixed;
|
|
check->has_leaks_fixed = has_leaks_fixed;
|
|
check->corruptions_fixed = corruptions_fixed;
|
|
check->has_corruptions_fixed = has_corruptions_fixed;
|
|
}
|
|
|
|
if (!ret) {
|
|
switch (output_format) {
|
|
case OFORMAT_HUMAN:
|
|
dump_human_image_check(check, quiet);
|
|
break;
|
|
case OFORMAT_JSON:
|
|
dump_json_image_check(check, quiet);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ret || check->check_errors) {
|
|
if (ret) {
|
|
error_report("Check failed: %s", strerror(-ret));
|
|
} else {
|
|
error_report("Check failed");
|
|
}
|
|
ret = 1;
|
|
goto fail;
|
|
}
|
|
|
|
if (check->corruptions) {
|
|
ret = 2;
|
|
} else if (check->leaks) {
|
|
ret = 3;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
|
|
fail:
|
|
qapi_free_ImageCheck(check);
|
|
blk_unref(blk);
|
|
return ret;
|
|
}
|
|
|
|
typedef struct CommonBlockJobCBInfo {
|
|
BlockDriverState *bs;
|
|
Error **errp;
|
|
} CommonBlockJobCBInfo;
|
|
|
|
static void common_block_job_cb(void *opaque, int ret)
|
|
{
|
|
CommonBlockJobCBInfo *cbi = opaque;
|
|
|
|
if (ret < 0) {
|
|
error_setg_errno(cbi->errp, -ret, "Block job failed");
|
|
}
|
|
}
|
|
|
|
static void run_block_job(BlockJob *job, Error **errp)
|
|
{
|
|
uint64_t progress_current, progress_total;
|
|
AioContext *aio_context = block_job_get_aio_context(job);
|
|
int ret = 0;
|
|
|
|
aio_context_acquire(aio_context);
|
|
job_ref(&job->job);
|
|
do {
|
|
float progress = 0.0f;
|
|
aio_poll(aio_context, true);
|
|
|
|
progress_get_snapshot(&job->job.progress, &progress_current,
|
|
&progress_total);
|
|
if (progress_total) {
|
|
progress = (float)progress_current / progress_total * 100.f;
|
|
}
|
|
qemu_progress_print(progress, 0);
|
|
} while (!job_is_ready(&job->job) && !job_is_completed(&job->job));
|
|
|
|
if (!job_is_completed(&job->job)) {
|
|
ret = job_complete_sync(&job->job, errp);
|
|
} else {
|
|
ret = job->job.ret;
|
|
}
|
|
job_unref(&job->job);
|
|
aio_context_release(aio_context);
|
|
|
|
/* publish completion progress only when success */
|
|
if (!ret) {
|
|
qemu_progress_print(100.f, 0);
|
|
}
|
|
}
|
|
|
|
static int img_commit(int argc, char **argv)
|
|
{
|
|
int c, ret, flags;
|
|
const char *filename, *fmt, *cache, *base;
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs, *base_bs;
|
|
BlockJob *job;
|
|
bool progress = false, quiet = false, drop = false;
|
|
bool writethrough;
|
|
Error *local_err = NULL;
|
|
CommonBlockJobCBInfo cbi;
|
|
bool image_opts = false;
|
|
AioContext *aio_context;
|
|
int64_t rate_limit = 0;
|
|
|
|
fmt = NULL;
|
|
cache = BDRV_DEFAULT_CACHE;
|
|
base = NULL;
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":f:ht:b:dpqr:",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 't':
|
|
cache = optarg;
|
|
break;
|
|
case 'b':
|
|
base = optarg;
|
|
/* -b implies -d */
|
|
drop = true;
|
|
break;
|
|
case 'd':
|
|
drop = true;
|
|
break;
|
|
case 'p':
|
|
progress = true;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 'r':
|
|
rate_limit = cvtnum("rate limit", optarg);
|
|
if (rate_limit < 0) {
|
|
return 1;
|
|
}
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Progress is not shown in Quiet mode */
|
|
if (quiet) {
|
|
progress = false;
|
|
}
|
|
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
flags = BDRV_O_RDWR | BDRV_O_UNMAP;
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid cache option: %s", cache);
|
|
return 1;
|
|
}
|
|
|
|
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
|
false);
|
|
if (!blk) {
|
|
return 1;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
qemu_progress_init(progress, 1.f);
|
|
qemu_progress_print(0.f, 100);
|
|
|
|
if (base) {
|
|
base_bs = bdrv_find_backing_image(bs, base);
|
|
if (!base_bs) {
|
|
error_setg(&local_err,
|
|
"Did not find '%s' in the backing chain of '%s'",
|
|
base, filename);
|
|
goto done;
|
|
}
|
|
} else {
|
|
/* This is different from QMP, which by default uses the deepest file in
|
|
* the backing chain (i.e., the very base); however, the traditional
|
|
* behavior of qemu-img commit is using the immediate backing file. */
|
|
base_bs = bdrv_backing_chain_next(bs);
|
|
if (!base_bs) {
|
|
error_setg(&local_err, "Image does not have a backing file");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
cbi = (CommonBlockJobCBInfo){
|
|
.errp = &local_err,
|
|
.bs = bs,
|
|
};
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
commit_active_start("commit", bs, base_bs, JOB_DEFAULT, rate_limit,
|
|
BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb,
|
|
&cbi, false, &local_err);
|
|
aio_context_release(aio_context);
|
|
if (local_err) {
|
|
goto done;
|
|
}
|
|
|
|
/* When the block job completes, the BlockBackend reference will point to
|
|
* the old backing file. In order to avoid that the top image is already
|
|
* deleted, so we can still empty it afterwards, increment the reference
|
|
* counter here preemptively. */
|
|
if (!drop) {
|
|
bdrv_ref(bs);
|
|
}
|
|
|
|
job = block_job_get("commit");
|
|
assert(job);
|
|
run_block_job(job, &local_err);
|
|
if (local_err) {
|
|
goto unref_backing;
|
|
}
|
|
|
|
if (!drop) {
|
|
BlockBackend *old_backing_blk;
|
|
|
|
old_backing_blk = blk_new_with_bs(bs, BLK_PERM_WRITE, BLK_PERM_ALL,
|
|
&local_err);
|
|
if (!old_backing_blk) {
|
|
goto unref_backing;
|
|
}
|
|
ret = blk_make_empty(old_backing_blk, &local_err);
|
|
blk_unref(old_backing_blk);
|
|
if (ret == -ENOTSUP) {
|
|
error_free(local_err);
|
|
local_err = NULL;
|
|
} else if (ret < 0) {
|
|
goto unref_backing;
|
|
}
|
|
}
|
|
|
|
unref_backing:
|
|
if (!drop) {
|
|
bdrv_unref(bs);
|
|
}
|
|
|
|
done:
|
|
qemu_progress_end();
|
|
|
|
blk_unref(blk);
|
|
|
|
if (local_err) {
|
|
error_report_err(local_err);
|
|
return 1;
|
|
}
|
|
|
|
qprintf(quiet, "Image committed.\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns -1 if 'buf' contains only zeroes, otherwise the byte index
|
|
* of the first sector boundary within buf where the sector contains a
|
|
* non-zero byte. This function is robust to a buffer that is not
|
|
* sector-aligned.
|
|
*/
|
|
static int64_t find_nonzero(const uint8_t *buf, int64_t n)
|
|
{
|
|
int64_t i;
|
|
int64_t end = QEMU_ALIGN_DOWN(n, BDRV_SECTOR_SIZE);
|
|
|
|
for (i = 0; i < end; i += BDRV_SECTOR_SIZE) {
|
|
if (!buffer_is_zero(buf + i, BDRV_SECTOR_SIZE)) {
|
|
return i;
|
|
}
|
|
}
|
|
if (i < n && !buffer_is_zero(buf + i, n - end)) {
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Returns true iff the first sector pointed to by 'buf' contains at least
|
|
* a non-NUL byte.
|
|
*
|
|
* 'pnum' is set to the number of sectors (including and immediately following
|
|
* the first one) that are known to be in the same allocated/unallocated state.
|
|
* The function will try to align the end offset to alignment boundaries so
|
|
* that the request will at least end aligned and consecutive requests will
|
|
* also start at an aligned offset.
|
|
*/
|
|
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum,
|
|
int64_t sector_num, int alignment)
|
|
{
|
|
bool is_zero;
|
|
int i, tail;
|
|
|
|
if (n <= 0) {
|
|
*pnum = 0;
|
|
return 0;
|
|
}
|
|
is_zero = buffer_is_zero(buf, BDRV_SECTOR_SIZE);
|
|
for(i = 1; i < n; i++) {
|
|
buf += BDRV_SECTOR_SIZE;
|
|
if (is_zero != buffer_is_zero(buf, BDRV_SECTOR_SIZE)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
tail = (sector_num + i) & (alignment - 1);
|
|
if (tail) {
|
|
if (is_zero && i <= tail) {
|
|
/* treat unallocated areas which only consist
|
|
* of a small tail as allocated. */
|
|
is_zero = false;
|
|
}
|
|
if (!is_zero) {
|
|
/* align up end offset of allocated areas. */
|
|
i += alignment - tail;
|
|
i = MIN(i, n);
|
|
} else {
|
|
/* align down end offset of zero areas. */
|
|
i -= tail;
|
|
}
|
|
}
|
|
*pnum = i;
|
|
return !is_zero;
|
|
}
|
|
|
|
/*
|
|
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
|
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
|
* breaking up write requests for only small sparse areas.
|
|
*/
|
|
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
|
|
int min, int64_t sector_num, int alignment)
|
|
{
|
|
int ret;
|
|
int num_checked, num_used;
|
|
|
|
if (n < min) {
|
|
min = n;
|
|
}
|
|
|
|
ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment);
|
|
if (!ret) {
|
|
return ret;
|
|
}
|
|
|
|
num_used = *pnum;
|
|
buf += BDRV_SECTOR_SIZE * *pnum;
|
|
n -= *pnum;
|
|
sector_num += *pnum;
|
|
num_checked = num_used;
|
|
|
|
while (n > 0) {
|
|
ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment);
|
|
|
|
buf += BDRV_SECTOR_SIZE * *pnum;
|
|
n -= *pnum;
|
|
sector_num += *pnum;
|
|
num_checked += *pnum;
|
|
if (ret) {
|
|
num_used = num_checked;
|
|
} else if (*pnum >= min) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
*pnum = num_used;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Compares two buffers sector by sector. Returns 0 if the first
|
|
* sector of each buffer matches, non-zero otherwise.
|
|
*
|
|
* pnum is set to the sector-aligned size of the buffer prefix that
|
|
* has the same matching status as the first sector.
|
|
*/
|
|
static int compare_buffers(const uint8_t *buf1, const uint8_t *buf2,
|
|
int64_t bytes, int64_t *pnum)
|
|
{
|
|
bool res;
|
|
int64_t i = MIN(bytes, BDRV_SECTOR_SIZE);
|
|
|
|
assert(bytes > 0);
|
|
|
|
res = !!memcmp(buf1, buf2, i);
|
|
while (i < bytes) {
|
|
int64_t len = MIN(bytes - i, BDRV_SECTOR_SIZE);
|
|
|
|
if (!!memcmp(buf1 + i, buf2 + i, len) != res) {
|
|
break;
|
|
}
|
|
i += len;
|
|
}
|
|
|
|
*pnum = i;
|
|
return res;
|
|
}
|
|
|
|
#define IO_BUF_SIZE (2 * MiB)
|
|
|
|
/*
|
|
* Check if passed sectors are empty (not allocated or contain only 0 bytes)
|
|
*
|
|
* Intended for use by 'qemu-img compare': Returns 0 in case sectors are
|
|
* filled with 0, 1 if sectors contain non-zero data (this is a comparison
|
|
* failure), and 4 on error (the exit status for read errors), after emitting
|
|
* an error message.
|
|
*
|
|
* @param blk: BlockBackend for the image
|
|
* @param offset: Starting offset to check
|
|
* @param bytes: Number of bytes to check
|
|
* @param filename: Name of disk file we are checking (logging purpose)
|
|
* @param buffer: Allocated buffer for storing read data
|
|
* @param quiet: Flag for quiet mode
|
|
*/
|
|
static int check_empty_sectors(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, const char *filename,
|
|
uint8_t *buffer, bool quiet)
|
|
{
|
|
int ret = 0;
|
|
int64_t idx;
|
|
|
|
ret = blk_pread(blk, offset, buffer, bytes);
|
|
if (ret < 0) {
|
|
error_report("Error while reading offset %" PRId64 " of %s: %s",
|
|
offset, filename, strerror(-ret));
|
|
return 4;
|
|
}
|
|
idx = find_nonzero(buffer, bytes);
|
|
if (idx >= 0) {
|
|
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
|
|
offset + idx);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Compares two images. Exit codes:
|
|
*
|
|
* 0 - Images are identical or the requested help was printed
|
|
* 1 - Images differ
|
|
* >1 - Error occurred
|
|
*/
|
|
static int img_compare(int argc, char **argv)
|
|
{
|
|
const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2;
|
|
BlockBackend *blk1, *blk2;
|
|
BlockDriverState *bs1, *bs2;
|
|
int64_t total_size1, total_size2;
|
|
uint8_t *buf1 = NULL, *buf2 = NULL;
|
|
int64_t pnum1, pnum2;
|
|
int allocated1, allocated2;
|
|
int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */
|
|
bool progress = false, quiet = false, strict = false;
|
|
int flags;
|
|
bool writethrough;
|
|
int64_t total_size;
|
|
int64_t offset = 0;
|
|
int64_t chunk;
|
|
int c;
|
|
uint64_t progress_base;
|
|
bool image_opts = false;
|
|
bool force_share = false;
|
|
|
|
cache = BDRV_DEFAULT_CACHE;
|
|
for (;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":hf:F:T:pqsU",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch (c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt1 = optarg;
|
|
break;
|
|
case 'F':
|
|
fmt2 = optarg;
|
|
break;
|
|
case 'T':
|
|
cache = optarg;
|
|
break;
|
|
case 'p':
|
|
progress = true;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 's':
|
|
strict = true;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
{
|
|
Error *local_err = NULL;
|
|
|
|
if (!user_creatable_add_from_str(optarg, &local_err)) {
|
|
if (local_err) {
|
|
error_report_err(local_err);
|
|
exit(2);
|
|
} else {
|
|
/* Help was printed */
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Progress is not shown in Quiet mode */
|
|
if (quiet) {
|
|
progress = false;
|
|
}
|
|
|
|
|
|
if (optind != argc - 2) {
|
|
error_exit("Expecting two image file names");
|
|
}
|
|
filename1 = argv[optind++];
|
|
filename2 = argv[optind++];
|
|
|
|
/* Initialize before goto out */
|
|
qemu_progress_init(progress, 2.0);
|
|
|
|
flags = 0;
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid source cache option: %s", cache);
|
|
ret = 2;
|
|
goto out3;
|
|
}
|
|
|
|
blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet,
|
|
force_share);
|
|
if (!blk1) {
|
|
ret = 2;
|
|
goto out3;
|
|
}
|
|
|
|
blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet,
|
|
force_share);
|
|
if (!blk2) {
|
|
ret = 2;
|
|
goto out2;
|
|
}
|
|
bs1 = blk_bs(blk1);
|
|
bs2 = blk_bs(blk2);
|
|
|
|
buf1 = blk_blockalign(blk1, IO_BUF_SIZE);
|
|
buf2 = blk_blockalign(blk2, IO_BUF_SIZE);
|
|
total_size1 = blk_getlength(blk1);
|
|
if (total_size1 < 0) {
|
|
error_report("Can't get size of %s: %s",
|
|
filename1, strerror(-total_size1));
|
|
ret = 4;
|
|
goto out;
|
|
}
|
|
total_size2 = blk_getlength(blk2);
|
|
if (total_size2 < 0) {
|
|
error_report("Can't get size of %s: %s",
|
|
filename2, strerror(-total_size2));
|
|
ret = 4;
|
|
goto out;
|
|
}
|
|
total_size = MIN(total_size1, total_size2);
|
|
progress_base = MAX(total_size1, total_size2);
|
|
|
|
qemu_progress_print(0, 100);
|
|
|
|
if (strict && total_size1 != total_size2) {
|
|
ret = 1;
|
|
qprintf(quiet, "Strict mode: Image size mismatch!\n");
|
|
goto out;
|
|
}
|
|
|
|
while (offset < total_size) {
|
|
int status1, status2;
|
|
|
|
status1 = bdrv_block_status_above(bs1, NULL, offset,
|
|
total_size1 - offset, &pnum1, NULL,
|
|
NULL);
|
|
if (status1 < 0) {
|
|
ret = 3;
|
|
error_report("Sector allocation test failed for %s", filename1);
|
|
goto out;
|
|
}
|
|
allocated1 = status1 & BDRV_BLOCK_ALLOCATED;
|
|
|
|
status2 = bdrv_block_status_above(bs2, NULL, offset,
|
|
total_size2 - offset, &pnum2, NULL,
|
|
NULL);
|
|
if (status2 < 0) {
|
|
ret = 3;
|
|
error_report("Sector allocation test failed for %s", filename2);
|
|
goto out;
|
|
}
|
|
allocated2 = status2 & BDRV_BLOCK_ALLOCATED;
|
|
|
|
assert(pnum1 && pnum2);
|
|
chunk = MIN(pnum1, pnum2);
|
|
|
|
if (strict) {
|
|
if (status1 != status2) {
|
|
ret = 1;
|
|
qprintf(quiet, "Strict mode: Offset %" PRId64
|
|
" block status mismatch!\n", offset);
|
|
goto out;
|
|
}
|
|
}
|
|
if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) {
|
|
/* nothing to do */
|
|
} else if (allocated1 == allocated2) {
|
|
if (allocated1) {
|
|
int64_t pnum;
|
|
|
|
chunk = MIN(chunk, IO_BUF_SIZE);
|
|
ret = blk_pread(blk1, offset, buf1, chunk);
|
|
if (ret < 0) {
|
|
error_report("Error while reading offset %" PRId64
|
|
" of %s: %s",
|
|
offset, filename1, strerror(-ret));
|
|
ret = 4;
|
|
goto out;
|
|
}
|
|
ret = blk_pread(blk2, offset, buf2, chunk);
|
|
if (ret < 0) {
|
|
error_report("Error while reading offset %" PRId64
|
|
" of %s: %s",
|
|
offset, filename2, strerror(-ret));
|
|
ret = 4;
|
|
goto out;
|
|
}
|
|
ret = compare_buffers(buf1, buf2, chunk, &pnum);
|
|
if (ret || pnum != chunk) {
|
|
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
|
|
offset + (ret ? 0 : pnum));
|
|
ret = 1;
|
|
goto out;
|
|
}
|
|
}
|
|
} else {
|
|
chunk = MIN(chunk, IO_BUF_SIZE);
|
|
if (allocated1) {
|
|
ret = check_empty_sectors(blk1, offset, chunk,
|
|
filename1, buf1, quiet);
|
|
} else {
|
|
ret = check_empty_sectors(blk2, offset, chunk,
|
|
filename2, buf1, quiet);
|
|
}
|
|
if (ret) {
|
|
goto out;
|
|
}
|
|
}
|
|
offset += chunk;
|
|
qemu_progress_print(((float) chunk / progress_base) * 100, 100);
|
|
}
|
|
|
|
if (total_size1 != total_size2) {
|
|
BlockBackend *blk_over;
|
|
const char *filename_over;
|
|
|
|
qprintf(quiet, "Warning: Image size mismatch!\n");
|
|
if (total_size1 > total_size2) {
|
|
blk_over = blk1;
|
|
filename_over = filename1;
|
|
} else {
|
|
blk_over = blk2;
|
|
filename_over = filename2;
|
|
}
|
|
|
|
while (offset < progress_base) {
|
|
ret = bdrv_block_status_above(blk_bs(blk_over), NULL, offset,
|
|
progress_base - offset, &chunk,
|
|
NULL, NULL);
|
|
if (ret < 0) {
|
|
ret = 3;
|
|
error_report("Sector allocation test failed for %s",
|
|
filename_over);
|
|
goto out;
|
|
|
|
}
|
|
if (ret & BDRV_BLOCK_ALLOCATED && !(ret & BDRV_BLOCK_ZERO)) {
|
|
chunk = MIN(chunk, IO_BUF_SIZE);
|
|
ret = check_empty_sectors(blk_over, offset, chunk,
|
|
filename_over, buf1, quiet);
|
|
if (ret) {
|
|
goto out;
|
|
}
|
|
}
|
|
offset += chunk;
|
|
qemu_progress_print(((float) chunk / progress_base) * 100, 100);
|
|
}
|
|
}
|
|
|
|
qprintf(quiet, "Images are identical.\n");
|
|
ret = 0;
|
|
|
|
out:
|
|
qemu_vfree(buf1);
|
|
qemu_vfree(buf2);
|
|
blk_unref(blk2);
|
|
out2:
|
|
blk_unref(blk1);
|
|
out3:
|
|
qemu_progress_end();
|
|
return ret;
|
|
}
|
|
|
|
/* Convenience wrapper around qmp_block_dirty_bitmap_merge */
|
|
static void do_dirty_bitmap_merge(const char *dst_node, const char *dst_name,
|
|
const char *src_node, const char *src_name,
|
|
Error **errp)
|
|
{
|
|
BlockDirtyBitmapMergeSource *merge_src;
|
|
BlockDirtyBitmapMergeSourceList *list = NULL;
|
|
|
|
merge_src = g_new0(BlockDirtyBitmapMergeSource, 1);
|
|
merge_src->type = QTYPE_QDICT;
|
|
merge_src->u.external.node = g_strdup(src_node);
|
|
merge_src->u.external.name = g_strdup(src_name);
|
|
QAPI_LIST_PREPEND(list, merge_src);
|
|
qmp_block_dirty_bitmap_merge(dst_node, dst_name, list, errp);
|
|
qapi_free_BlockDirtyBitmapMergeSourceList(list);
|
|
}
|
|
|
|
enum ImgConvertBlockStatus {
|
|
BLK_DATA,
|
|
BLK_ZERO,
|
|
BLK_BACKING_FILE,
|
|
};
|
|
|
|
#define MAX_COROUTINES 16
|
|
#define CONVERT_THROTTLE_GROUP "img_convert"
|
|
|
|
typedef struct ImgConvertState {
|
|
BlockBackend **src;
|
|
int64_t *src_sectors;
|
|
int *src_alignment;
|
|
int src_num;
|
|
int64_t total_sectors;
|
|
int64_t allocated_sectors;
|
|
int64_t allocated_done;
|
|
int64_t sector_num;
|
|
int64_t wr_offs;
|
|
enum ImgConvertBlockStatus status;
|
|
int64_t sector_next_status;
|
|
BlockBackend *target;
|
|
bool has_zero_init;
|
|
bool compressed;
|
|
bool target_is_new;
|
|
bool target_has_backing;
|
|
int64_t target_backing_sectors; /* negative if unknown */
|
|
bool wr_in_order;
|
|
bool copy_range;
|
|
bool salvage;
|
|
bool quiet;
|
|
int min_sparse;
|
|
int alignment;
|
|
size_t cluster_sectors;
|
|
size_t buf_sectors;
|
|
long num_coroutines;
|
|
int running_coroutines;
|
|
Coroutine *co[MAX_COROUTINES];
|
|
int64_t wait_sector_num[MAX_COROUTINES];
|
|
CoMutex lock;
|
|
int ret;
|
|
} ImgConvertState;
|
|
|
|
static void convert_select_part(ImgConvertState *s, int64_t sector_num,
|
|
int *src_cur, int64_t *src_cur_offset)
|
|
{
|
|
*src_cur = 0;
|
|
*src_cur_offset = 0;
|
|
while (sector_num - *src_cur_offset >= s->src_sectors[*src_cur]) {
|
|
*src_cur_offset += s->src_sectors[*src_cur];
|
|
(*src_cur)++;
|
|
assert(*src_cur < s->src_num);
|
|
}
|
|
}
|
|
|
|
static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
|
|
{
|
|
int64_t src_cur_offset;
|
|
int ret, n, src_cur;
|
|
bool post_backing_zero = false;
|
|
|
|
convert_select_part(s, sector_num, &src_cur, &src_cur_offset);
|
|
|
|
assert(s->total_sectors > sector_num);
|
|
n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS);
|
|
|
|
if (s->target_backing_sectors >= 0) {
|
|
if (sector_num >= s->target_backing_sectors) {
|
|
post_backing_zero = true;
|
|
} else if (sector_num + n > s->target_backing_sectors) {
|
|
/* Split requests around target_backing_sectors (because
|
|
* starting from there, zeros are handled differently) */
|
|
n = s->target_backing_sectors - sector_num;
|
|
}
|
|
}
|
|
|
|
if (s->sector_next_status <= sector_num) {
|
|
uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE;
|
|
int64_t count;
|
|
int tail;
|
|
BlockDriverState *src_bs = blk_bs(s->src[src_cur]);
|
|
BlockDriverState *base;
|
|
|
|
if (s->target_has_backing) {
|
|
base = bdrv_cow_bs(bdrv_skip_filters(src_bs));
|
|
} else {
|
|
base = NULL;
|
|
}
|
|
|
|
do {
|
|
count = n * BDRV_SECTOR_SIZE;
|
|
|
|
ret = bdrv_block_status_above(src_bs, base, offset, count, &count,
|
|
NULL, NULL);
|
|
|
|
if (ret < 0) {
|
|
if (s->salvage) {
|
|
if (n == 1) {
|
|
if (!s->quiet) {
|
|
warn_report("error while reading block status at "
|
|
"offset %" PRIu64 ": %s", offset,
|
|
strerror(-ret));
|
|
}
|
|
/* Just try to read the data, then */
|
|
ret = BDRV_BLOCK_DATA;
|
|
count = BDRV_SECTOR_SIZE;
|
|
} else {
|
|
/* Retry on a shorter range */
|
|
n = DIV_ROUND_UP(n, 4);
|
|
}
|
|
} else {
|
|
error_report("error while reading block status at offset "
|
|
"%" PRIu64 ": %s", offset, strerror(-ret));
|
|
return ret;
|
|
}
|
|
}
|
|
} while (ret < 0);
|
|
|
|
n = DIV_ROUND_UP(count, BDRV_SECTOR_SIZE);
|
|
|
|
/*
|
|
* Avoid that s->sector_next_status becomes unaligned to the source
|
|
* request alignment and/or cluster size to avoid unnecessary read
|
|
* cycles.
|
|
*/
|
|
tail = (sector_num - src_cur_offset + n) % s->src_alignment[src_cur];
|
|
if (n > tail) {
|
|
n -= tail;
|
|
}
|
|
|
|
if (ret & BDRV_BLOCK_ZERO) {
|
|
s->status = post_backing_zero ? BLK_BACKING_FILE : BLK_ZERO;
|
|
} else if (ret & BDRV_BLOCK_DATA) {
|
|
s->status = BLK_DATA;
|
|
} else {
|
|
s->status = s->target_has_backing ? BLK_BACKING_FILE : BLK_DATA;
|
|
}
|
|
|
|
s->sector_next_status = sector_num + n;
|
|
}
|
|
|
|
n = MIN(n, s->sector_next_status - sector_num);
|
|
if (s->status == BLK_DATA) {
|
|
n = MIN(n, s->buf_sectors);
|
|
}
|
|
|
|
/* We need to write complete clusters for compressed images, so if an
|
|
* unallocated area is shorter than that, we must consider the whole
|
|
* cluster allocated. */
|
|
if (s->compressed) {
|
|
if (n < s->cluster_sectors) {
|
|
n = MIN(s->cluster_sectors, s->total_sectors - sector_num);
|
|
s->status = BLK_DATA;
|
|
} else {
|
|
n = QEMU_ALIGN_DOWN(n, s->cluster_sectors);
|
|
}
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static int coroutine_fn convert_co_read(ImgConvertState *s, int64_t sector_num,
|
|
int nb_sectors, uint8_t *buf)
|
|
{
|
|
uint64_t single_read_until = 0;
|
|
int n, ret;
|
|
|
|
assert(nb_sectors <= s->buf_sectors);
|
|
while (nb_sectors > 0) {
|
|
BlockBackend *blk;
|
|
int src_cur;
|
|
int64_t bs_sectors, src_cur_offset;
|
|
uint64_t offset;
|
|
|
|
/* In the case of compression with multiple source files, we can get a
|
|
* nb_sectors that spreads into the next part. So we must be able to
|
|
* read across multiple BDSes for one convert_read() call. */
|
|
convert_select_part(s, sector_num, &src_cur, &src_cur_offset);
|
|
blk = s->src[src_cur];
|
|
bs_sectors = s->src_sectors[src_cur];
|
|
|
|
offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS;
|
|
|
|
n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset));
|
|
if (single_read_until > offset) {
|
|
n = 1;
|
|
}
|
|
|
|
ret = blk_co_pread(blk, offset, n << BDRV_SECTOR_BITS, buf, 0);
|
|
if (ret < 0) {
|
|
if (s->salvage) {
|
|
if (n > 1) {
|
|
single_read_until = offset + (n << BDRV_SECTOR_BITS);
|
|
continue;
|
|
} else {
|
|
if (!s->quiet) {
|
|
warn_report("error while reading offset %" PRIu64
|
|
": %s", offset, strerror(-ret));
|
|
}
|
|
memset(buf, 0, BDRV_SECTOR_SIZE);
|
|
}
|
|
} else {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
sector_num += n;
|
|
nb_sectors -= n;
|
|
buf += n * BDRV_SECTOR_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num,
|
|
int nb_sectors, uint8_t *buf,
|
|
enum ImgConvertBlockStatus status)
|
|
{
|
|
int ret;
|
|
|
|
while (nb_sectors > 0) {
|
|
int n = nb_sectors;
|
|
BdrvRequestFlags flags = s->compressed ? BDRV_REQ_WRITE_COMPRESSED : 0;
|
|
|
|
switch (status) {
|
|
case BLK_BACKING_FILE:
|
|
/* If we have a backing file, leave clusters unallocated that are
|
|
* unallocated in the source image, so that the backing file is
|
|
* visible at the respective offset. */
|
|
assert(s->target_has_backing);
|
|
break;
|
|
|
|
case BLK_DATA:
|
|
/* If we're told to keep the target fully allocated (-S 0) or there
|
|
* is real non-zero data, we must write it. Otherwise we can treat
|
|
* it as zero sectors.
|
|
* Compressed clusters need to be written as a whole, so in that
|
|
* case we can only save the write if the buffer is completely
|
|
* zeroed. */
|
|
if (!s->min_sparse ||
|
|
(!s->compressed &&
|
|
is_allocated_sectors_min(buf, n, &n, s->min_sparse,
|
|
sector_num, s->alignment)) ||
|
|
(s->compressed &&
|
|
!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)))
|
|
{
|
|
ret = blk_co_pwrite(s->target, sector_num << BDRV_SECTOR_BITS,
|
|
n << BDRV_SECTOR_BITS, buf, flags);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
break;
|
|
}
|
|
/* fall-through */
|
|
|
|
case BLK_ZERO:
|
|
if (s->has_zero_init) {
|
|
assert(!s->target_has_backing);
|
|
break;
|
|
}
|
|
ret = blk_co_pwrite_zeroes(s->target,
|
|
sector_num << BDRV_SECTOR_BITS,
|
|
n << BDRV_SECTOR_BITS,
|
|
BDRV_REQ_MAY_UNMAP);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
break;
|
|
}
|
|
|
|
sector_num += n;
|
|
nb_sectors -= n;
|
|
buf += n * BDRV_SECTOR_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int coroutine_fn convert_co_copy_range(ImgConvertState *s, int64_t sector_num,
|
|
int nb_sectors)
|
|
{
|
|
int n, ret;
|
|
|
|
while (nb_sectors > 0) {
|
|
BlockBackend *blk;
|
|
int src_cur;
|
|
int64_t bs_sectors, src_cur_offset;
|
|
int64_t offset;
|
|
|
|
convert_select_part(s, sector_num, &src_cur, &src_cur_offset);
|
|
offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS;
|
|
blk = s->src[src_cur];
|
|
bs_sectors = s->src_sectors[src_cur];
|
|
|
|
n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset));
|
|
|
|
ret = blk_co_copy_range(blk, offset, s->target,
|
|
sector_num << BDRV_SECTOR_BITS,
|
|
n << BDRV_SECTOR_BITS, 0, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
sector_num += n;
|
|
nb_sectors -= n;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void coroutine_fn convert_co_do_copy(void *opaque)
|
|
{
|
|
ImgConvertState *s = opaque;
|
|
uint8_t *buf = NULL;
|
|
int ret, i;
|
|
int index = -1;
|
|
|
|
for (i = 0; i < s->num_coroutines; i++) {
|
|
if (s->co[i] == qemu_coroutine_self()) {
|
|
index = i;
|
|
break;
|
|
}
|
|
}
|
|
assert(index >= 0);
|
|
|
|
s->running_coroutines++;
|
|
buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE);
|
|
|
|
while (1) {
|
|
int n;
|
|
int64_t sector_num;
|
|
enum ImgConvertBlockStatus status;
|
|
bool copy_range;
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) {
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
break;
|
|
}
|
|
n = convert_iteration_sectors(s, s->sector_num);
|
|
if (n < 0) {
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
s->ret = n;
|
|
break;
|
|
}
|
|
/* save current sector and allocation status to local variables */
|
|
sector_num = s->sector_num;
|
|
status = s->status;
|
|
if (!s->min_sparse && s->status == BLK_ZERO) {
|
|
n = MIN(n, s->buf_sectors);
|
|
}
|
|
/* increment global sector counter so that other coroutines can
|
|
* already continue reading beyond this request */
|
|
s->sector_num += n;
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
if (status == BLK_DATA || (!s->min_sparse && status == BLK_ZERO)) {
|
|
s->allocated_done += n;
|
|
qemu_progress_print(100.0 * s->allocated_done /
|
|
s->allocated_sectors, 0);
|
|
}
|
|
|
|
retry:
|
|
copy_range = s->copy_range && s->status == BLK_DATA;
|
|
if (status == BLK_DATA && !copy_range) {
|
|
ret = convert_co_read(s, sector_num, n, buf);
|
|
if (ret < 0) {
|
|
error_report("error while reading at byte %lld: %s",
|
|
sector_num * BDRV_SECTOR_SIZE, strerror(-ret));
|
|
s->ret = ret;
|
|
}
|
|
} else if (!s->min_sparse && status == BLK_ZERO) {
|
|
status = BLK_DATA;
|
|
memset(buf, 0x00, n * BDRV_SECTOR_SIZE);
|
|
}
|
|
|
|
if (s->wr_in_order) {
|
|
/* keep writes in order */
|
|
while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) {
|
|
s->wait_sector_num[index] = sector_num;
|
|
qemu_coroutine_yield();
|
|
}
|
|
s->wait_sector_num[index] = -1;
|
|
}
|
|
|
|
if (s->ret == -EINPROGRESS) {
|
|
if (copy_range) {
|
|
ret = convert_co_copy_range(s, sector_num, n);
|
|
if (ret) {
|
|
s->copy_range = false;
|
|
goto retry;
|
|
}
|
|
} else {
|
|
ret = convert_co_write(s, sector_num, n, buf, status);
|
|
}
|
|
if (ret < 0) {
|
|
error_report("error while writing at byte %lld: %s",
|
|
sector_num * BDRV_SECTOR_SIZE, strerror(-ret));
|
|
s->ret = ret;
|
|
}
|
|
}
|
|
|
|
if (s->wr_in_order) {
|
|
/* reenter the coroutine that might have waited
|
|
* for this write to complete */
|
|
s->wr_offs = sector_num + n;
|
|
for (i = 0; i < s->num_coroutines; i++) {
|
|
if (s->co[i] && s->wait_sector_num[i] == s->wr_offs) {
|
|
/*
|
|
* A -> B -> A cannot occur because A has
|
|
* s->wait_sector_num[i] == -1 during A -> B. Therefore
|
|
* B will never enter A during this time window.
|
|
*/
|
|
qemu_coroutine_enter(s->co[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
qemu_vfree(buf);
|
|
s->co[index] = NULL;
|
|
s->running_coroutines--;
|
|
if (!s->running_coroutines && s->ret == -EINPROGRESS) {
|
|
/* the convert job finished successfully */
|
|
s->ret = 0;
|
|
}
|
|
}
|
|
|
|
static int convert_do_copy(ImgConvertState *s)
|
|
{
|
|
int ret, i, n;
|
|
int64_t sector_num = 0;
|
|
|
|
/* Check whether we have zero initialisation or can get it efficiently */
|
|
if (!s->has_zero_init && s->target_is_new && s->min_sparse &&
|
|
!s->target_has_backing) {
|
|
s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target));
|
|
}
|
|
|
|
/* Allocate buffer for copied data. For compressed images, only one cluster
|
|
* can be copied at a time. */
|
|
if (s->compressed) {
|
|
if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) {
|
|
error_report("invalid cluster size");
|
|
return -EINVAL;
|
|
}
|
|
s->buf_sectors = s->cluster_sectors;
|
|
}
|
|
|
|
while (sector_num < s->total_sectors) {
|
|
n = convert_iteration_sectors(s, sector_num);
|
|
if (n < 0) {
|
|
return n;
|
|
}
|
|
if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO))
|
|
{
|
|
s->allocated_sectors += n;
|
|
}
|
|
sector_num += n;
|
|
}
|
|
|
|
/* Do the copy */
|
|
s->sector_next_status = 0;
|
|
s->ret = -EINPROGRESS;
|
|
|
|
qemu_co_mutex_init(&s->lock);
|
|
for (i = 0; i < s->num_coroutines; i++) {
|
|
s->co[i] = qemu_coroutine_create(convert_co_do_copy, s);
|
|
s->wait_sector_num[i] = -1;
|
|
qemu_coroutine_enter(s->co[i]);
|
|
}
|
|
|
|
while (s->running_coroutines) {
|
|
main_loop_wait(false);
|
|
}
|
|
|
|
if (s->compressed && !s->ret) {
|
|
/* signal EOF to align */
|
|
ret = blk_pwrite_compressed(s->target, 0, NULL, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return s->ret;
|
|
}
|
|
|
|
/* Check that bitmaps can be copied, or output an error */
|
|
static int convert_check_bitmaps(BlockDriverState *src, bool skip_broken)
|
|
{
|
|
BdrvDirtyBitmap *bm;
|
|
|
|
if (!bdrv_supports_persistent_dirty_bitmap(src)) {
|
|
error_report("Source lacks bitmap support");
|
|
return -1;
|
|
}
|
|
FOR_EACH_DIRTY_BITMAP(src, bm) {
|
|
if (!bdrv_dirty_bitmap_get_persistence(bm)) {
|
|
continue;
|
|
}
|
|
if (!skip_broken && bdrv_dirty_bitmap_inconsistent(bm)) {
|
|
error_report("Cannot copy inconsistent bitmap '%s'",
|
|
bdrv_dirty_bitmap_name(bm));
|
|
error_printf("Try --skip-broken-bitmaps, or "
|
|
"use 'qemu-img bitmap --remove' to delete it\n");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int convert_copy_bitmaps(BlockDriverState *src, BlockDriverState *dst,
|
|
bool skip_broken)
|
|
{
|
|
BdrvDirtyBitmap *bm;
|
|
Error *err = NULL;
|
|
|
|
FOR_EACH_DIRTY_BITMAP(src, bm) {
|
|
const char *name;
|
|
|
|
if (!bdrv_dirty_bitmap_get_persistence(bm)) {
|
|
continue;
|
|
}
|
|
name = bdrv_dirty_bitmap_name(bm);
|
|
if (skip_broken && bdrv_dirty_bitmap_inconsistent(bm)) {
|
|
warn_report("Skipping inconsistent bitmap '%s'", name);
|
|
continue;
|
|
}
|
|
qmp_block_dirty_bitmap_add(dst->node_name, name,
|
|
true, bdrv_dirty_bitmap_granularity(bm),
|
|
true, true,
|
|
true, !bdrv_dirty_bitmap_enabled(bm),
|
|
&err);
|
|
if (err) {
|
|
error_reportf_err(err, "Failed to create bitmap %s: ", name);
|
|
return -1;
|
|
}
|
|
|
|
do_dirty_bitmap_merge(dst->node_name, name, src->node_name, name,
|
|
&err);
|
|
if (err) {
|
|
error_reportf_err(err, "Failed to populate bitmap %s: ", name);
|
|
qmp_block_dirty_bitmap_remove(dst->node_name, name, NULL);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_BUF_SECTORS 32768
|
|
|
|
static void set_rate_limit(BlockBackend *blk, int64_t rate_limit)
|
|
{
|
|
ThrottleConfig cfg;
|
|
|
|
throttle_config_init(&cfg);
|
|
cfg.buckets[THROTTLE_BPS_WRITE].avg = rate_limit;
|
|
|
|
blk_io_limits_enable(blk, CONVERT_THROTTLE_GROUP);
|
|
blk_set_io_limits(blk, &cfg);
|
|
}
|
|
|
|
static int img_convert(int argc, char **argv)
|
|
{
|
|
int c, bs_i, flags, src_flags = BDRV_O_NO_SHARE;
|
|
const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe",
|
|
*src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL,
|
|
*out_filename, *out_baseimg_param, *snapshot_name = NULL,
|
|
*backing_fmt = NULL;
|
|
BlockDriver *drv = NULL, *proto_drv = NULL;
|
|
BlockDriverInfo bdi;
|
|
BlockDriverState *out_bs;
|
|
QemuOpts *opts = NULL, *sn_opts = NULL;
|
|
QemuOptsList *create_opts = NULL;
|
|
QDict *open_opts = NULL;
|
|
char *options = NULL;
|
|
Error *local_err = NULL;
|
|
bool writethrough, src_writethrough, image_opts = false,
|
|
skip_create = false, progress = false, tgt_image_opts = false;
|
|
int64_t ret = -EINVAL;
|
|
bool force_share = false;
|
|
bool explict_min_sparse = false;
|
|
bool bitmaps = false;
|
|
bool skip_broken = false;
|
|
int64_t rate_limit = 0;
|
|
|
|
ImgConvertState s = (ImgConvertState) {
|
|
/* Need at least 4k of zeros for sparse detection */
|
|
.min_sparse = 8,
|
|
.copy_range = false,
|
|
.buf_sectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE,
|
|
.wr_in_order = true,
|
|
.num_coroutines = 8,
|
|
};
|
|
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS},
|
|
{"salvage", no_argument, 0, OPTION_SALVAGE},
|
|
{"target-is-zero", no_argument, 0, OPTION_TARGET_IS_ZERO},
|
|
{"bitmaps", no_argument, 0, OPTION_BITMAPS},
|
|
{"skip-broken-bitmaps", no_argument, 0, OPTION_SKIP_BROKEN},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":hf:O:B:CcF:o:l:S:pt:T:qnm:WUr:",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'O':
|
|
out_fmt = optarg;
|
|
break;
|
|
case 'B':
|
|
out_baseimg = optarg;
|
|
break;
|
|
case 'C':
|
|
s.copy_range = true;
|
|
break;
|
|
case 'c':
|
|
s.compressed = true;
|
|
break;
|
|
case 'F':
|
|
backing_fmt = optarg;
|
|
break;
|
|
case 'o':
|
|
if (accumulate_options(&options, optarg) < 0) {
|
|
goto fail_getopt;
|
|
}
|
|
break;
|
|
case 'l':
|
|
if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
|
|
sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts,
|
|
optarg, false);
|
|
if (!sn_opts) {
|
|
error_report("Failed in parsing snapshot param '%s'",
|
|
optarg);
|
|
goto fail_getopt;
|
|
}
|
|
} else {
|
|
snapshot_name = optarg;
|
|
}
|
|
break;
|
|
case 'S':
|
|
{
|
|
int64_t sval;
|
|
|
|
sval = cvtnum("buffer size for sparse output", optarg);
|
|
if (sval < 0) {
|
|
goto fail_getopt;
|
|
} else if (!QEMU_IS_ALIGNED(sval, BDRV_SECTOR_SIZE) ||
|
|
sval / BDRV_SECTOR_SIZE > MAX_BUF_SECTORS) {
|
|
error_report("Invalid buffer size for sparse output specified. "
|
|
"Valid sizes are multiples of %llu up to %llu. Select "
|
|
"0 to disable sparse detection (fully allocates output).",
|
|
BDRV_SECTOR_SIZE, MAX_BUF_SECTORS * BDRV_SECTOR_SIZE);
|
|
goto fail_getopt;
|
|
}
|
|
|
|
s.min_sparse = sval / BDRV_SECTOR_SIZE;
|
|
explict_min_sparse = true;
|
|
break;
|
|
}
|
|
case 'p':
|
|
progress = true;
|
|
break;
|
|
case 't':
|
|
cache = optarg;
|
|
break;
|
|
case 'T':
|
|
src_cache = optarg;
|
|
break;
|
|
case 'q':
|
|
s.quiet = true;
|
|
break;
|
|
case 'n':
|
|
skip_create = true;
|
|
break;
|
|
case 'm':
|
|
if (qemu_strtol(optarg, NULL, 0, &s.num_coroutines) ||
|
|
s.num_coroutines < 1 || s.num_coroutines > MAX_COROUTINES) {
|
|
error_report("Invalid number of coroutines. Allowed number of"
|
|
" coroutines is between 1 and %d", MAX_COROUTINES);
|
|
goto fail_getopt;
|
|
}
|
|
break;
|
|
case 'W':
|
|
s.wr_in_order = false;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case 'r':
|
|
rate_limit = cvtnum("rate limit", optarg);
|
|
if (rate_limit < 0) {
|
|
goto fail_getopt;
|
|
}
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
case OPTION_SALVAGE:
|
|
s.salvage = true;
|
|
break;
|
|
case OPTION_TARGET_IMAGE_OPTS:
|
|
tgt_image_opts = true;
|
|
break;
|
|
case OPTION_TARGET_IS_ZERO:
|
|
/*
|
|
* The user asserting that the target is blank has the
|
|
* same effect as the target driver supporting zero
|
|
* initialisation.
|
|
*/
|
|
s.has_zero_init = true;
|
|
break;
|
|
case OPTION_BITMAPS:
|
|
bitmaps = true;
|
|
break;
|
|
case OPTION_SKIP_BROKEN:
|
|
skip_broken = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!out_fmt && !tgt_image_opts) {
|
|
out_fmt = "raw";
|
|
}
|
|
|
|
if (skip_broken && !bitmaps) {
|
|
error_report("Use of --skip-broken-bitmaps requires --bitmaps");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (s.compressed && s.copy_range) {
|
|
error_report("Cannot enable copy offloading when -c is used");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (explict_min_sparse && s.copy_range) {
|
|
error_report("Cannot enable copy offloading when -S is used");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (s.copy_range && s.salvage) {
|
|
error_report("Cannot use copy offloading in salvaging mode");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (tgt_image_opts && !skip_create) {
|
|
error_report("--target-image-opts requires use of -n flag");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (skip_create && options) {
|
|
error_report("-o has no effect when skipping image creation");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
if (s.has_zero_init && !skip_create) {
|
|
error_report("--target-is-zero requires use of -n flag");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
s.src_num = argc - optind - 1;
|
|
out_filename = s.src_num >= 1 ? argv[argc - 1] : NULL;
|
|
|
|
if (options && has_help_option(options)) {
|
|
if (out_fmt) {
|
|
ret = print_block_option_help(out_filename, out_fmt);
|
|
goto fail_getopt;
|
|
} else {
|
|
error_report("Option help requires a format be specified");
|
|
goto fail_getopt;
|
|
}
|
|
}
|
|
|
|
if (s.src_num < 1) {
|
|
error_report("Must specify image file name");
|
|
goto fail_getopt;
|
|
}
|
|
|
|
/* ret is still -EINVAL until here */
|
|
ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid source cache option: %s", src_cache);
|
|
goto fail_getopt;
|
|
}
|
|
|
|
/* Initialize before goto out */
|
|
if (s.quiet) {
|
|
progress = false;
|
|
}
|
|
qemu_progress_init(progress, 1.0);
|
|
qemu_progress_print(0, 100);
|
|
|
|
s.src = g_new0(BlockBackend *, s.src_num);
|
|
s.src_sectors = g_new(int64_t, s.src_num);
|
|
s.src_alignment = g_new(int, s.src_num);
|
|
|
|
for (bs_i = 0; bs_i < s.src_num; bs_i++) {
|
|
BlockDriverState *src_bs;
|
|
s.src[bs_i] = img_open(image_opts, argv[optind + bs_i],
|
|
fmt, src_flags, src_writethrough, s.quiet,
|
|
force_share);
|
|
if (!s.src[bs_i]) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
s.src_sectors[bs_i] = blk_nb_sectors(s.src[bs_i]);
|
|
if (s.src_sectors[bs_i] < 0) {
|
|
error_report("Could not get size of %s: %s",
|
|
argv[optind + bs_i], strerror(-s.src_sectors[bs_i]));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
src_bs = blk_bs(s.src[bs_i]);
|
|
s.src_alignment[bs_i] = DIV_ROUND_UP(src_bs->bl.request_alignment,
|
|
BDRV_SECTOR_SIZE);
|
|
if (!bdrv_get_info(src_bs, &bdi)) {
|
|
s.src_alignment[bs_i] = MAX(s.src_alignment[bs_i],
|
|
bdi.cluster_size / BDRV_SECTOR_SIZE);
|
|
}
|
|
s.total_sectors += s.src_sectors[bs_i];
|
|
}
|
|
|
|
if (sn_opts) {
|
|
bdrv_snapshot_load_tmp(blk_bs(s.src[0]),
|
|
qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
|
|
qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
|
|
&local_err);
|
|
} else if (snapshot_name != NULL) {
|
|
if (s.src_num > 1) {
|
|
error_report("No support for concatenating multiple snapshot");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(s.src[0]), snapshot_name,
|
|
&local_err);
|
|
}
|
|
if (local_err) {
|
|
error_reportf_err(local_err, "Failed to load snapshot: ");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (!skip_create) {
|
|
/* Find driver and parse its options */
|
|
drv = bdrv_find_format(out_fmt);
|
|
if (!drv) {
|
|
error_report("Unknown file format '%s'", out_fmt);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
proto_drv = bdrv_find_protocol(out_filename, true, &local_err);
|
|
if (!proto_drv) {
|
|
error_report_err(local_err);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (!drv->create_opts) {
|
|
error_report("Format driver '%s' does not support image creation",
|
|
drv->format_name);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (!proto_drv->create_opts) {
|
|
error_report("Protocol driver '%s' does not support image creation",
|
|
proto_drv->format_name);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
create_opts = qemu_opts_append(create_opts, drv->create_opts);
|
|
create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
|
|
|
|
opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
|
|
if (options) {
|
|
if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) {
|
|
error_report_err(local_err);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
qemu_opt_set_number(opts, BLOCK_OPT_SIZE,
|
|
s.total_sectors * BDRV_SECTOR_SIZE, &error_abort);
|
|
ret = add_old_style_options(out_fmt, opts, out_baseimg, backing_fmt);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Get backing file name if -o backing_file was used */
|
|
out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
|
|
if (out_baseimg_param) {
|
|
out_baseimg = out_baseimg_param;
|
|
}
|
|
s.target_has_backing = (bool) out_baseimg;
|
|
|
|
if (s.has_zero_init && s.target_has_backing) {
|
|
error_report("Cannot use --target-is-zero when the destination "
|
|
"image has a backing file");
|
|
goto out;
|
|
}
|
|
|
|
if (s.src_num > 1 && out_baseimg) {
|
|
error_report("Having a backing file for the target makes no sense when "
|
|
"concatenating multiple input images");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (out_baseimg_param) {
|
|
if (!qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT)) {
|
|
error_report("Use of backing file requires explicit "
|
|
"backing format");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Check if compression is supported */
|
|
if (s.compressed) {
|
|
bool encryption =
|
|
qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
|
|
const char *encryptfmt =
|
|
qemu_opt_get(opts, BLOCK_OPT_ENCRYPT_FORMAT);
|
|
const char *preallocation =
|
|
qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
|
|
|
|
if (drv && !block_driver_can_compress(drv)) {
|
|
error_report("Compression not supported for this file format");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (encryption || encryptfmt) {
|
|
error_report("Compression and encryption not supported at "
|
|
"the same time");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (preallocation
|
|
&& strcmp(preallocation, "off"))
|
|
{
|
|
error_report("Compression and preallocation not supported at "
|
|
"the same time");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Determine if bitmaps need copying */
|
|
if (bitmaps) {
|
|
if (s.src_num > 1) {
|
|
error_report("Copying bitmaps only possible with single source");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
ret = convert_check_bitmaps(blk_bs(s.src[0]), skip_broken);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The later open call will need any decryption secrets, and
|
|
* bdrv_create() will purge "opts", so extract them now before
|
|
* they are lost.
|
|
*/
|
|
if (!skip_create) {
|
|
open_opts = qdict_new();
|
|
qemu_opt_foreach(opts, img_add_key_secrets, open_opts, &error_abort);
|
|
|
|
/* Create the new image */
|
|
ret = bdrv_create(drv, out_filename, opts, &local_err);
|
|
if (ret < 0) {
|
|
error_reportf_err(local_err, "%s: error while converting %s: ",
|
|
out_filename, out_fmt);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
s.target_is_new = !skip_create;
|
|
|
|
flags = s.min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid cache option: %s", cache);
|
|
goto out;
|
|
}
|
|
|
|
if (flags & BDRV_O_NOCACHE) {
|
|
/*
|
|
* If we open the target with O_DIRECT, it may be necessary to
|
|
* extend its size to align to the physical sector size.
|
|
*/
|
|
flags |= BDRV_O_RESIZE;
|
|
}
|
|
|
|
if (skip_create) {
|
|
s.target = img_open(tgt_image_opts, out_filename, out_fmt,
|
|
flags, writethrough, s.quiet, false);
|
|
} else {
|
|
/* TODO ultimately we should allow --target-image-opts
|
|
* to be used even when -n is not given.
|
|
* That has to wait for bdrv_create to be improved
|
|
* to allow filenames in option syntax
|
|
*/
|
|
s.target = img_open_file(out_filename, open_opts, out_fmt,
|
|
flags, writethrough, s.quiet, false);
|
|
open_opts = NULL; /* blk_new_open will have freed it */
|
|
}
|
|
if (!s.target) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
out_bs = blk_bs(s.target);
|
|
|
|
if (bitmaps && !bdrv_supports_persistent_dirty_bitmap(out_bs)) {
|
|
error_report("Format driver '%s' does not support bitmaps",
|
|
out_bs->drv->format_name);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (s.compressed && !block_driver_can_compress(out_bs->drv)) {
|
|
error_report("Compression not supported for this file format");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* increase bufsectors from the default 4096 (2M) if opt_transfer
|
|
* or discard_alignment of the out_bs is greater. Limit to
|
|
* MAX_BUF_SECTORS as maximum which is currently 32768 (16MB). */
|
|
s.buf_sectors = MIN(MAX_BUF_SECTORS,
|
|
MAX(s.buf_sectors,
|
|
MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS,
|
|
out_bs->bl.pdiscard_alignment >>
|
|
BDRV_SECTOR_BITS)));
|
|
|
|
/* try to align the write requests to the destination to avoid unnecessary
|
|
* RMW cycles. */
|
|
s.alignment = MAX(pow2floor(s.min_sparse),
|
|
DIV_ROUND_UP(out_bs->bl.request_alignment,
|
|
BDRV_SECTOR_SIZE));
|
|
assert(is_power_of_2(s.alignment));
|
|
|
|
if (skip_create) {
|
|
int64_t output_sectors = blk_nb_sectors(s.target);
|
|
if (output_sectors < 0) {
|
|
error_report("unable to get output image length: %s",
|
|
strerror(-output_sectors));
|
|
ret = -1;
|
|
goto out;
|
|
} else if (output_sectors < s.total_sectors) {
|
|
error_report("output file is smaller than input file");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (s.target_has_backing && s.target_is_new) {
|
|
/* Errors are treated as "backing length unknown" (which means
|
|
* s.target_backing_sectors has to be negative, which it will
|
|
* be automatically). The backing file length is used only
|
|
* for optimizations, so such a case is not fatal. */
|
|
s.target_backing_sectors =
|
|
bdrv_nb_sectors(bdrv_backing_chain_next(out_bs));
|
|
} else {
|
|
s.target_backing_sectors = -1;
|
|
}
|
|
|
|
ret = bdrv_get_info(out_bs, &bdi);
|
|
if (ret < 0) {
|
|
if (s.compressed) {
|
|
error_report("could not get block driver info");
|
|
goto out;
|
|
}
|
|
} else {
|
|
s.compressed = s.compressed || bdi.needs_compressed_writes;
|
|
s.cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
|
|
}
|
|
|
|
if (rate_limit) {
|
|
set_rate_limit(s.target, rate_limit);
|
|
}
|
|
|
|
ret = convert_do_copy(&s);
|
|
|
|
/* Now copy the bitmaps */
|
|
if (bitmaps && ret == 0) {
|
|
ret = convert_copy_bitmaps(blk_bs(s.src[0]), out_bs, skip_broken);
|
|
}
|
|
|
|
out:
|
|
if (!ret) {
|
|
qemu_progress_print(100, 0);
|
|
}
|
|
qemu_progress_end();
|
|
qemu_opts_del(opts);
|
|
qemu_opts_free(create_opts);
|
|
qobject_unref(open_opts);
|
|
blk_unref(s.target);
|
|
if (s.src) {
|
|
for (bs_i = 0; bs_i < s.src_num; bs_i++) {
|
|
blk_unref(s.src[bs_i]);
|
|
}
|
|
g_free(s.src);
|
|
}
|
|
g_free(s.src_sectors);
|
|
g_free(s.src_alignment);
|
|
fail_getopt:
|
|
qemu_opts_del(sn_opts);
|
|
g_free(options);
|
|
|
|
return !!ret;
|
|
}
|
|
|
|
|
|
static void dump_snapshots(BlockDriverState *bs)
|
|
{
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
|
int nb_sns, i;
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns <= 0)
|
|
return;
|
|
printf("Snapshot list:\n");
|
|
bdrv_snapshot_dump(NULL);
|
|
printf("\n");
|
|
for(i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
bdrv_snapshot_dump(sn);
|
|
printf("\n");
|
|
}
|
|
g_free(sn_tab);
|
|
}
|
|
|
|
static void dump_json_image_info_list(ImageInfoList *list)
|
|
{
|
|
GString *str;
|
|
QObject *obj;
|
|
Visitor *v = qobject_output_visitor_new(&obj);
|
|
|
|
visit_type_ImageInfoList(v, NULL, &list, &error_abort);
|
|
visit_complete(v, &obj);
|
|
str = qobject_to_json_pretty(obj, true);
|
|
assert(str != NULL);
|
|
printf("%s\n", str->str);
|
|
qobject_unref(obj);
|
|
visit_free(v);
|
|
g_string_free(str, true);
|
|
}
|
|
|
|
static void dump_json_image_info(ImageInfo *info)
|
|
{
|
|
GString *str;
|
|
QObject *obj;
|
|
Visitor *v = qobject_output_visitor_new(&obj);
|
|
|
|
visit_type_ImageInfo(v, NULL, &info, &error_abort);
|
|
visit_complete(v, &obj);
|
|
str = qobject_to_json_pretty(obj, true);
|
|
assert(str != NULL);
|
|
printf("%s\n", str->str);
|
|
qobject_unref(obj);
|
|
visit_free(v);
|
|
g_string_free(str, true);
|
|
}
|
|
|
|
static void dump_human_image_info_list(ImageInfoList *list)
|
|
{
|
|
ImageInfoList *elem;
|
|
bool delim = false;
|
|
|
|
for (elem = list; elem; elem = elem->next) {
|
|
if (delim) {
|
|
printf("\n");
|
|
}
|
|
delim = true;
|
|
|
|
bdrv_image_info_dump(elem->value);
|
|
}
|
|
}
|
|
|
|
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
|
{
|
|
return strcmp(a, b) == 0;
|
|
}
|
|
|
|
/**
|
|
* Open an image file chain and return an ImageInfoList
|
|
*
|
|
* @filename: topmost image filename
|
|
* @fmt: topmost image format (may be NULL to autodetect)
|
|
* @chain: true - enumerate entire backing file chain
|
|
* false - only topmost image file
|
|
*
|
|
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
|
* image file. If there was an error a message will have been printed to
|
|
* stderr.
|
|
*/
|
|
static ImageInfoList *collect_image_info_list(bool image_opts,
|
|
const char *filename,
|
|
const char *fmt,
|
|
bool chain, bool force_share)
|
|
{
|
|
ImageInfoList *head = NULL;
|
|
ImageInfoList **tail = &head;
|
|
GHashTable *filenames;
|
|
Error *err = NULL;
|
|
|
|
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
|
|
|
|
while (filename) {
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
ImageInfo *info;
|
|
|
|
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
|
|
error_report("Backing file '%s' creates an infinite loop.",
|
|
filename);
|
|
goto err;
|
|
}
|
|
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
|
|
|
blk = img_open(image_opts, filename, fmt,
|
|
BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false,
|
|
force_share);
|
|
if (!blk) {
|
|
goto err;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
bdrv_query_image_info(bs, &info, &err);
|
|
if (err) {
|
|
error_report_err(err);
|
|
blk_unref(blk);
|
|
goto err;
|
|
}
|
|
|
|
QAPI_LIST_APPEND(tail, info);
|
|
|
|
blk_unref(blk);
|
|
|
|
/* Clear parameters that only apply to the topmost image */
|
|
filename = fmt = NULL;
|
|
image_opts = false;
|
|
|
|
if (chain) {
|
|
if (info->has_full_backing_filename) {
|
|
filename = info->full_backing_filename;
|
|
} else if (info->has_backing_filename) {
|
|
error_report("Could not determine absolute backing filename,"
|
|
" but backing filename '%s' present",
|
|
info->backing_filename);
|
|
goto err;
|
|
}
|
|
if (info->has_backing_filename_format) {
|
|
fmt = info->backing_filename_format;
|
|
}
|
|
}
|
|
}
|
|
g_hash_table_destroy(filenames);
|
|
return head;
|
|
|
|
err:
|
|
qapi_free_ImageInfoList(head);
|
|
g_hash_table_destroy(filenames);
|
|
return NULL;
|
|
}
|
|
|
|
static int img_info(int argc, char **argv)
|
|
{
|
|
int c;
|
|
OutputFormat output_format = OFORMAT_HUMAN;
|
|
bool chain = false;
|
|
const char *filename, *fmt, *output;
|
|
ImageInfoList *list;
|
|
bool image_opts = false;
|
|
bool force_share = false;
|
|
|
|
fmt = NULL;
|
|
output = NULL;
|
|
for(;;) {
|
|
int option_index = 0;
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"format", required_argument, 0, 'f'},
|
|
{"output", required_argument, 0, OPTION_OUTPUT},
|
|
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":f:hU",
|
|
long_options, &option_index);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OUTPUT:
|
|
output = optarg;
|
|
break;
|
|
case OPTION_BACKING_CHAIN:
|
|
chain = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
if (output && !strcmp(output, "json")) {
|
|
output_format = OFORMAT_JSON;
|
|
} else if (output && !strcmp(output, "human")) {
|
|
output_format = OFORMAT_HUMAN;
|
|
} else if (output) {
|
|
error_report("--output must be used with human or json as argument.");
|
|
return 1;
|
|
}
|
|
|
|
list = collect_image_info_list(image_opts, filename, fmt, chain,
|
|
force_share);
|
|
if (!list) {
|
|
return 1;
|
|
}
|
|
|
|
switch (output_format) {
|
|
case OFORMAT_HUMAN:
|
|
dump_human_image_info_list(list);
|
|
break;
|
|
case OFORMAT_JSON:
|
|
if (chain) {
|
|
dump_json_image_info_list(list);
|
|
} else {
|
|
dump_json_image_info(list->value);
|
|
}
|
|
break;
|
|
}
|
|
|
|
qapi_free_ImageInfoList(list);
|
|
return 0;
|
|
}
|
|
|
|
static int dump_map_entry(OutputFormat output_format, MapEntry *e,
|
|
MapEntry *next)
|
|
{
|
|
switch (output_format) {
|
|
case OFORMAT_HUMAN:
|
|
if (e->data && !e->has_offset) {
|
|
error_report("File contains external, encrypted or compressed clusters.");
|
|
return -1;
|
|
}
|
|
if (e->data && !e->zero) {
|
|
printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
|
|
e->start, e->length,
|
|
e->has_offset ? e->offset : 0,
|
|
e->has_filename ? e->filename : "");
|
|
}
|
|
/* This format ignores the distinction between 0, ZERO and ZERO|DATA.
|
|
* Modify the flags here to allow more coalescing.
|
|
*/
|
|
if (next && (!next->data || next->zero)) {
|
|
next->data = false;
|
|
next->zero = true;
|
|
}
|
|
break;
|
|
case OFORMAT_JSON:
|
|
printf("{ \"start\": %"PRId64", \"length\": %"PRId64","
|
|
" \"depth\": %"PRId64", \"present\": %s, \"zero\": %s,"
|
|
" \"data\": %s", e->start, e->length, e->depth,
|
|
e->present ? "true" : "false",
|
|
e->zero ? "true" : "false",
|
|
e->data ? "true" : "false");
|
|
if (e->has_offset) {
|
|
printf(", \"offset\": %"PRId64"", e->offset);
|
|
}
|
|
putchar('}');
|
|
|
|
if (next) {
|
|
puts(",");
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int get_block_status(BlockDriverState *bs, int64_t offset,
|
|
int64_t bytes, MapEntry *e)
|
|
{
|
|
int ret;
|
|
int depth;
|
|
BlockDriverState *file;
|
|
bool has_offset;
|
|
int64_t map;
|
|
char *filename = NULL;
|
|
|
|
/* As an optimization, we could cache the current range of unallocated
|
|
* clusters in each file of the chain, and avoid querying the same
|
|
* range repeatedly.
|
|
*/
|
|
|
|
depth = 0;
|
|
for (;;) {
|
|
bs = bdrv_skip_filters(bs);
|
|
ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
assert(bytes);
|
|
if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
|
|
break;
|
|
}
|
|
bs = bdrv_cow_bs(bs);
|
|
if (bs == NULL) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
depth++;
|
|
}
|
|
|
|
has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID);
|
|
|
|
if (file && has_offset) {
|
|
bdrv_refresh_filename(file);
|
|
filename = file->filename;
|
|
}
|
|
|
|
*e = (MapEntry) {
|
|
.start = offset,
|
|
.length = bytes,
|
|
.data = !!(ret & BDRV_BLOCK_DATA),
|
|
.zero = !!(ret & BDRV_BLOCK_ZERO),
|
|
.offset = map,
|
|
.has_offset = has_offset,
|
|
.depth = depth,
|
|
.present = !!(ret & BDRV_BLOCK_ALLOCATED),
|
|
.has_filename = filename,
|
|
.filename = filename,
|
|
};
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next)
|
|
{
|
|
if (curr->length == 0) {
|
|
return false;
|
|
}
|
|
if (curr->zero != next->zero ||
|
|
curr->data != next->data ||
|
|
curr->depth != next->depth ||
|
|
curr->present != next->present ||
|
|
curr->has_filename != next->has_filename ||
|
|
curr->has_offset != next->has_offset) {
|
|
return false;
|
|
}
|
|
if (curr->has_filename && strcmp(curr->filename, next->filename)) {
|
|
return false;
|
|
}
|
|
if (curr->has_offset && curr->offset + curr->length != next->offset) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int img_map(int argc, char **argv)
|
|
{
|
|
int c;
|
|
OutputFormat output_format = OFORMAT_HUMAN;
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
const char *filename, *fmt, *output;
|
|
int64_t length;
|
|
MapEntry curr = { .length = 0 }, next;
|
|
int ret = 0;
|
|
bool image_opts = false;
|
|
bool force_share = false;
|
|
int64_t start_offset = 0;
|
|
int64_t max_length = -1;
|
|
|
|
fmt = NULL;
|
|
output = NULL;
|
|
for (;;) {
|
|
int option_index = 0;
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"format", required_argument, 0, 'f'},
|
|
{"output", required_argument, 0, OPTION_OUTPUT},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{"start-offset", required_argument, 0, 's'},
|
|
{"max-length", required_argument, 0, 'l'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":f:s:l:hU",
|
|
long_options, &option_index);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch (c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OUTPUT:
|
|
output = optarg;
|
|
break;
|
|
case 's':
|
|
start_offset = cvtnum("start offset", optarg);
|
|
if (start_offset < 0) {
|
|
return 1;
|
|
}
|
|
break;
|
|
case 'l':
|
|
max_length = cvtnum("max length", optarg);
|
|
if (max_length < 0) {
|
|
return 1;
|
|
}
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[optind];
|
|
|
|
if (output && !strcmp(output, "json")) {
|
|
output_format = OFORMAT_JSON;
|
|
} else if (output && !strcmp(output, "human")) {
|
|
output_format = OFORMAT_HUMAN;
|
|
} else if (output) {
|
|
error_report("--output must be used with human or json as argument.");
|
|
return 1;
|
|
}
|
|
|
|
blk = img_open(image_opts, filename, fmt, 0, false, false, force_share);
|
|
if (!blk) {
|
|
return 1;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
if (output_format == OFORMAT_HUMAN) {
|
|
printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
|
|
} else if (output_format == OFORMAT_JSON) {
|
|
putchar('[');
|
|
}
|
|
|
|
length = blk_getlength(blk);
|
|
if (length < 0) {
|
|
error_report("Failed to get size for '%s'", filename);
|
|
return 1;
|
|
}
|
|
if (max_length != -1) {
|
|
length = MIN(start_offset + max_length, length);
|
|
}
|
|
|
|
curr.start = start_offset;
|
|
while (curr.start + curr.length < length) {
|
|
int64_t offset = curr.start + curr.length;
|
|
int64_t n = length - offset;
|
|
|
|
ret = get_block_status(bs, offset, n, &next);
|
|
if (ret < 0) {
|
|
error_report("Could not read file metadata: %s", strerror(-ret));
|
|
goto out;
|
|
}
|
|
|
|
if (entry_mergeable(&curr, &next)) {
|
|
curr.length += next.length;
|
|
continue;
|
|
}
|
|
|
|
if (curr.length > 0) {
|
|
ret = dump_map_entry(output_format, &curr, &next);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
curr = next;
|
|
}
|
|
|
|
ret = dump_map_entry(output_format, &curr, NULL);
|
|
if (output_format == OFORMAT_JSON) {
|
|
puts("]");
|
|
}
|
|
|
|
out:
|
|
blk_unref(blk);
|
|
return ret < 0;
|
|
}
|
|
|
|
#define SNAPSHOT_LIST 1
|
|
#define SNAPSHOT_CREATE 2
|
|
#define SNAPSHOT_APPLY 3
|
|
#define SNAPSHOT_DELETE 4
|
|
|
|
static int img_snapshot(int argc, char **argv)
|
|
{
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn;
|
|
char *filename, *snapshot_name = NULL;
|
|
int c, ret = 0, bdrv_oflags;
|
|
int action = 0;
|
|
qemu_timeval tv;
|
|
bool quiet = false;
|
|
Error *err = NULL;
|
|
bool image_opts = false;
|
|
bool force_share = false;
|
|
|
|
bdrv_oflags = BDRV_O_RDWR;
|
|
/* Parse commandline parameters */
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":la:c:d:hqU",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
return 0;
|
|
case 'l':
|
|
if (action) {
|
|
error_exit("Cannot mix '-l', '-a', '-c', '-d'");
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_LIST;
|
|
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
|
break;
|
|
case 'a':
|
|
if (action) {
|
|
error_exit("Cannot mix '-l', '-a', '-c', '-d'");
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_APPLY;
|
|
snapshot_name = optarg;
|
|
break;
|
|
case 'c':
|
|
if (action) {
|
|
error_exit("Cannot mix '-l', '-a', '-c', '-d'");
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_CREATE;
|
|
snapshot_name = optarg;
|
|
break;
|
|
case 'd':
|
|
if (action) {
|
|
error_exit("Cannot mix '-l', '-a', '-c', '-d'");
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_DELETE;
|
|
snapshot_name = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
/* Open the image */
|
|
blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet,
|
|
force_share);
|
|
if (!blk) {
|
|
return 1;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
/* Perform the requested action */
|
|
switch(action) {
|
|
case SNAPSHOT_LIST:
|
|
dump_snapshots(bs);
|
|
break;
|
|
|
|
case SNAPSHOT_CREATE:
|
|
memset(&sn, 0, sizeof(sn));
|
|
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
|
|
|
qemu_gettimeofday(&tv);
|
|
sn.date_sec = tv.tv_sec;
|
|
sn.date_nsec = tv.tv_usec * 1000;
|
|
|
|
ret = bdrv_snapshot_create(bs, &sn);
|
|
if (ret) {
|
|
error_report("Could not create snapshot '%s': %d (%s)",
|
|
snapshot_name, ret, strerror(-ret));
|
|
}
|
|
break;
|
|
|
|
case SNAPSHOT_APPLY:
|
|
ret = bdrv_snapshot_goto(bs, snapshot_name, &err);
|
|
if (ret) {
|
|
error_reportf_err(err, "Could not apply snapshot '%s': ",
|
|
snapshot_name);
|
|
}
|
|
break;
|
|
|
|
case SNAPSHOT_DELETE:
|
|
ret = bdrv_snapshot_find(bs, &sn, snapshot_name);
|
|
if (ret < 0) {
|
|
error_report("Could not delete snapshot '%s': snapshot not "
|
|
"found", snapshot_name);
|
|
ret = 1;
|
|
} else {
|
|
ret = bdrv_snapshot_delete(bs, sn.id_str, sn.name, &err);
|
|
if (ret < 0) {
|
|
error_reportf_err(err, "Could not delete snapshot '%s': ",
|
|
snapshot_name);
|
|
ret = 1;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Cleanup */
|
|
blk_unref(blk);
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int img_rebase(int argc, char **argv)
|
|
{
|
|
BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
|
|
uint8_t *buf_old = NULL;
|
|
uint8_t *buf_new = NULL;
|
|
BlockDriverState *bs = NULL, *prefix_chain_bs = NULL;
|
|
BlockDriverState *unfiltered_bs;
|
|
char *filename;
|
|
const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
|
|
int c, flags, src_flags, ret;
|
|
bool writethrough, src_writethrough;
|
|
int unsafe = 0;
|
|
bool force_share = false;
|
|
int progress = 0;
|
|
bool quiet = false;
|
|
Error *local_err = NULL;
|
|
bool image_opts = false;
|
|
|
|
/* Parse commandline parameters */
|
|
fmt = NULL;
|
|
cache = BDRV_DEFAULT_CACHE;
|
|
src_cache = BDRV_DEFAULT_CACHE;
|
|
out_baseimg = NULL;
|
|
out_basefmt = NULL;
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":hf:F:b:upt:T:qU",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
return 0;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'F':
|
|
out_basefmt = optarg;
|
|
break;
|
|
case 'b':
|
|
out_baseimg = optarg;
|
|
break;
|
|
case 'u':
|
|
unsafe = 1;
|
|
break;
|
|
case 'p':
|
|
progress = 1;
|
|
break;
|
|
case 't':
|
|
cache = optarg;
|
|
break;
|
|
case 'T':
|
|
src_cache = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (quiet) {
|
|
progress = 0;
|
|
}
|
|
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
if (!unsafe && !out_baseimg) {
|
|
error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
qemu_progress_init(progress, 2.0);
|
|
qemu_progress_print(0, 100);
|
|
|
|
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid cache option: %s", cache);
|
|
goto out;
|
|
}
|
|
|
|
src_flags = 0;
|
|
ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid source cache option: %s", src_cache);
|
|
goto out;
|
|
}
|
|
|
|
/* The source files are opened read-only, don't care about WCE */
|
|
assert((src_flags & BDRV_O_RDWR) == 0);
|
|
(void) src_writethrough;
|
|
|
|
/*
|
|
* Open the images.
|
|
*
|
|
* Ignore the old backing file for unsafe rebase in case we want to correct
|
|
* the reference to a renamed or moved backing file.
|
|
*/
|
|
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
|
false);
|
|
if (!blk) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
unfiltered_bs = bdrv_skip_filters(bs);
|
|
|
|
if (out_basefmt != NULL) {
|
|
if (bdrv_find_format(out_basefmt) == NULL) {
|
|
error_report("Invalid format name: '%s'", out_basefmt);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* For safe rebasing we need to compare old and new backing file */
|
|
if (!unsafe) {
|
|
QDict *options = NULL;
|
|
BlockDriverState *base_bs = bdrv_cow_bs(unfiltered_bs);
|
|
|
|
if (base_bs) {
|
|
blk_old_backing = blk_new(qemu_get_aio_context(),
|
|
BLK_PERM_CONSISTENT_READ,
|
|
BLK_PERM_ALL);
|
|
ret = blk_insert_bs(blk_old_backing, base_bs,
|
|
&local_err);
|
|
if (ret < 0) {
|
|
error_reportf_err(local_err,
|
|
"Could not reuse old backing file '%s': ",
|
|
base_bs->filename);
|
|
goto out;
|
|
}
|
|
} else {
|
|
blk_old_backing = NULL;
|
|
}
|
|
|
|
if (out_baseimg[0]) {
|
|
const char *overlay_filename;
|
|
char *out_real_path;
|
|
|
|
options = qdict_new();
|
|
if (out_basefmt) {
|
|
qdict_put_str(options, "driver", out_basefmt);
|
|
}
|
|
if (force_share) {
|
|
qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
|
|
}
|
|
|
|
bdrv_refresh_filename(bs);
|
|
overlay_filename = bs->exact_filename[0] ? bs->exact_filename
|
|
: bs->filename;
|
|
out_real_path =
|
|
bdrv_get_full_backing_filename_from_filename(overlay_filename,
|
|
out_baseimg,
|
|
&local_err);
|
|
if (local_err) {
|
|
qobject_unref(options);
|
|
error_reportf_err(local_err,
|
|
"Could not resolve backing filename: ");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Find out whether we rebase an image on top of a previous image
|
|
* in its chain.
|
|
*/
|
|
prefix_chain_bs = bdrv_find_backing_image(bs, out_real_path);
|
|
if (prefix_chain_bs) {
|
|
qobject_unref(options);
|
|
g_free(out_real_path);
|
|
|
|
blk_new_backing = blk_new(qemu_get_aio_context(),
|
|
BLK_PERM_CONSISTENT_READ,
|
|
BLK_PERM_ALL);
|
|
ret = blk_insert_bs(blk_new_backing, prefix_chain_bs,
|
|
&local_err);
|
|
if (ret < 0) {
|
|
error_reportf_err(local_err,
|
|
"Could not reuse backing file '%s': ",
|
|
out_baseimg);
|
|
goto out;
|
|
}
|
|
} else {
|
|
blk_new_backing = blk_new_open(out_real_path, NULL,
|
|
options, src_flags, &local_err);
|
|
g_free(out_real_path);
|
|
if (!blk_new_backing) {
|
|
error_reportf_err(local_err,
|
|
"Could not open new backing file '%s': ",
|
|
out_baseimg);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check each unallocated cluster in the COW file. If it is unallocated,
|
|
* accesses go to the backing file. We must therefore compare this cluster
|
|
* in the old and new backing file, and if they differ we need to copy it
|
|
* from the old backing file into the COW file.
|
|
*
|
|
* If qemu-img crashes during this step, no harm is done. The content of
|
|
* the image is the same as the original one at any time.
|
|
*/
|
|
if (!unsafe) {
|
|
int64_t size;
|
|
int64_t old_backing_size = 0;
|
|
int64_t new_backing_size = 0;
|
|
uint64_t offset;
|
|
int64_t n;
|
|
float local_progress = 0;
|
|
|
|
buf_old = blk_blockalign(blk, IO_BUF_SIZE);
|
|
buf_new = blk_blockalign(blk, IO_BUF_SIZE);
|
|
|
|
size = blk_getlength(blk);
|
|
if (size < 0) {
|
|
error_report("Could not get size of '%s': %s",
|
|
filename, strerror(-size));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (blk_old_backing) {
|
|
old_backing_size = blk_getlength(blk_old_backing);
|
|
if (old_backing_size < 0) {
|
|
char backing_name[PATH_MAX];
|
|
|
|
bdrv_get_backing_filename(bs, backing_name,
|
|
sizeof(backing_name));
|
|
error_report("Could not get size of '%s': %s",
|
|
backing_name, strerror(-old_backing_size));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
if (blk_new_backing) {
|
|
new_backing_size = blk_getlength(blk_new_backing);
|
|
if (new_backing_size < 0) {
|
|
error_report("Could not get size of '%s': %s",
|
|
out_baseimg, strerror(-new_backing_size));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (size != 0) {
|
|
local_progress = (float)100 / (size / MIN(size, IO_BUF_SIZE));
|
|
}
|
|
|
|
for (offset = 0; offset < size; offset += n) {
|
|
bool buf_old_is_zero = false;
|
|
|
|
/* How many bytes can we handle with the next read? */
|
|
n = MIN(IO_BUF_SIZE, size - offset);
|
|
|
|
/* If the cluster is allocated, we don't need to take action */
|
|
ret = bdrv_is_allocated(unfiltered_bs, offset, n, &n);
|
|
if (ret < 0) {
|
|
error_report("error while reading image metadata: %s",
|
|
strerror(-ret));
|
|
goto out;
|
|
}
|
|
if (ret) {
|
|
continue;
|
|
}
|
|
|
|
if (prefix_chain_bs) {
|
|
/*
|
|
* If cluster wasn't changed since prefix_chain, we don't need
|
|
* to take action
|
|
*/
|
|
ret = bdrv_is_allocated_above(bdrv_cow_bs(unfiltered_bs),
|
|
prefix_chain_bs, false,
|
|
offset, n, &n);
|
|
if (ret < 0) {
|
|
error_report("error while reading image metadata: %s",
|
|
strerror(-ret));
|
|
goto out;
|
|
}
|
|
if (!ret) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read old and new backing file and take into consideration that
|
|
* backing files may be smaller than the COW image.
|
|
*/
|
|
if (offset >= old_backing_size) {
|
|
memset(buf_old, 0, n);
|
|
buf_old_is_zero = true;
|
|
} else {
|
|
if (offset + n > old_backing_size) {
|
|
n = old_backing_size - offset;
|
|
}
|
|
|
|
ret = blk_pread(blk_old_backing, offset, buf_old, n);
|
|
if (ret < 0) {
|
|
error_report("error while reading from old backing file");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (offset >= new_backing_size || !blk_new_backing) {
|
|
memset(buf_new, 0, n);
|
|
} else {
|
|
if (offset + n > new_backing_size) {
|
|
n = new_backing_size - offset;
|
|
}
|
|
|
|
ret = blk_pread(blk_new_backing, offset, buf_new, n);
|
|
if (ret < 0) {
|
|
error_report("error while reading from new backing file");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* If they differ, we need to write to the COW file */
|
|
uint64_t written = 0;
|
|
|
|
while (written < n) {
|
|
int64_t pnum;
|
|
|
|
if (compare_buffers(buf_old + written, buf_new + written,
|
|
n - written, &pnum))
|
|
{
|
|
if (buf_old_is_zero) {
|
|
ret = blk_pwrite_zeroes(blk, offset + written, pnum, 0);
|
|
} else {
|
|
ret = blk_pwrite(blk, offset + written,
|
|
buf_old + written, pnum, 0);
|
|
}
|
|
if (ret < 0) {
|
|
error_report("Error while writing to COW image: %s",
|
|
strerror(-ret));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
written += pnum;
|
|
}
|
|
qemu_progress_print(local_progress, 100);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change the backing file. All clusters that are different from the old
|
|
* backing file are overwritten in the COW file now, so the visible content
|
|
* doesn't change when we switch the backing file.
|
|
*/
|
|
if (out_baseimg && *out_baseimg) {
|
|
ret = bdrv_change_backing_file(unfiltered_bs, out_baseimg, out_basefmt,
|
|
true);
|
|
} else {
|
|
ret = bdrv_change_backing_file(unfiltered_bs, NULL, NULL, false);
|
|
}
|
|
|
|
if (ret == -ENOSPC) {
|
|
error_report("Could not change the backing file to '%s': No "
|
|
"space left in the file header", out_baseimg);
|
|
} else if (ret == -EINVAL && out_baseimg && !out_basefmt) {
|
|
error_report("Could not change the backing file to '%s': backing "
|
|
"format must be specified", out_baseimg);
|
|
} else if (ret < 0) {
|
|
error_report("Could not change the backing file to '%s': %s",
|
|
out_baseimg, strerror(-ret));
|
|
}
|
|
|
|
qemu_progress_print(100, 0);
|
|
/*
|
|
* TODO At this point it is possible to check if any clusters that are
|
|
* allocated in the COW file are the same in the backing file. If so, they
|
|
* could be dropped from the COW file. Don't do this before switching the
|
|
* backing file, in case of a crash this would lead to corruption.
|
|
*/
|
|
out:
|
|
qemu_progress_end();
|
|
/* Cleanup */
|
|
if (!unsafe) {
|
|
blk_unref(blk_old_backing);
|
|
blk_unref(blk_new_backing);
|
|
}
|
|
qemu_vfree(buf_old);
|
|
qemu_vfree(buf_new);
|
|
|
|
blk_unref(blk);
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int img_resize(int argc, char **argv)
|
|
{
|
|
Error *err = NULL;
|
|
int c, ret, relative;
|
|
const char *filename, *fmt, *size;
|
|
int64_t n, total_size, current_size;
|
|
bool quiet = false;
|
|
BlockBackend *blk = NULL;
|
|
PreallocMode prealloc = PREALLOC_MODE_OFF;
|
|
QemuOpts *param;
|
|
|
|
static QemuOptsList resize_options = {
|
|
.name = "resize_options",
|
|
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
|
|
.desc = {
|
|
{
|
|
.name = BLOCK_OPT_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Virtual disk size"
|
|
}, {
|
|
/* end of list */
|
|
}
|
|
},
|
|
};
|
|
bool image_opts = false;
|
|
bool shrink = false;
|
|
|
|
/* Remove size from argv manually so that negative numbers are not treated
|
|
* as options by getopt. */
|
|
if (argc < 3) {
|
|
error_exit("Not enough arguments");
|
|
return 1;
|
|
}
|
|
|
|
size = argv[--argc];
|
|
|
|
/* Parse getopt arguments */
|
|
fmt = NULL;
|
|
for(;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"preallocation", required_argument, 0, OPTION_PREALLOCATION},
|
|
{"shrink", no_argument, 0, OPTION_SHRINK},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":f:hq",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
switch(c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
case OPTION_PREALLOCATION:
|
|
prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg,
|
|
PREALLOC_MODE__MAX, NULL);
|
|
if (prealloc == PREALLOC_MODE__MAX) {
|
|
error_report("Invalid preallocation mode '%s'", optarg);
|
|
return 1;
|
|
}
|
|
break;
|
|
case OPTION_SHRINK:
|
|
shrink = true;
|
|
break;
|
|
}
|
|
}
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting image file name and size");
|
|
}
|
|
filename = argv[optind++];
|
|
|
|
/* Choose grow, shrink, or absolute resize mode */
|
|
switch (size[0]) {
|
|
case '+':
|
|
relative = 1;
|
|
size++;
|
|
break;
|
|
case '-':
|
|
relative = -1;
|
|
size++;
|
|
break;
|
|
default:
|
|
relative = 0;
|
|
break;
|
|
}
|
|
|
|
/* Parse size */
|
|
param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
|
|
if (!qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err)) {
|
|
error_report_err(err);
|
|
ret = -1;
|
|
qemu_opts_del(param);
|
|
goto out;
|
|
}
|
|
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
|
qemu_opts_del(param);
|
|
|
|
blk = img_open(image_opts, filename, fmt,
|
|
BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet,
|
|
false);
|
|
if (!blk) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
current_size = blk_getlength(blk);
|
|
if (current_size < 0) {
|
|
error_report("Failed to inquire current image length: %s",
|
|
strerror(-current_size));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (relative) {
|
|
total_size = current_size + n * relative;
|
|
} else {
|
|
total_size = n;
|
|
}
|
|
if (total_size <= 0) {
|
|
error_report("New image size must be positive");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (total_size <= current_size && prealloc != PREALLOC_MODE_OFF) {
|
|
error_report("Preallocation can only be used for growing images");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (total_size < current_size && !shrink) {
|
|
error_report("Use the --shrink option to perform a shrink operation.");
|
|
warn_report("Shrinking an image will delete all data beyond the "
|
|
"shrunken image's end. Before performing such an "
|
|
"operation, make sure there is no important data there.");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The user expects the image to have the desired size after
|
|
* resizing, so pass @exact=true. It is of no use to report
|
|
* success when the image has not actually been resized.
|
|
*/
|
|
ret = blk_truncate(blk, total_size, true, prealloc, 0, &err);
|
|
if (!ret) {
|
|
qprintf(quiet, "Image resized.\n");
|
|
} else {
|
|
error_report_err(err);
|
|
}
|
|
out:
|
|
blk_unref(blk);
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void amend_status_cb(BlockDriverState *bs,
|
|
int64_t offset, int64_t total_work_size,
|
|
void *opaque)
|
|
{
|
|
qemu_progress_print(100.f * offset / total_work_size, 0);
|
|
}
|
|
|
|
static int print_amend_option_help(const char *format)
|
|
{
|
|
BlockDriver *drv;
|
|
|
|
/* Find driver and parse its options */
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_report("Unknown file format '%s'", format);
|
|
return 1;
|
|
}
|
|
|
|
if (!drv->bdrv_amend_options) {
|
|
error_report("Format driver '%s' does not support option amendment",
|
|
format);
|
|
return 1;
|
|
}
|
|
|
|
/* Every driver supporting amendment must have amend_opts */
|
|
assert(drv->amend_opts);
|
|
|
|
printf("Amend options for '%s':\n", format);
|
|
qemu_opts_print_help(drv->amend_opts, false);
|
|
return 0;
|
|
}
|
|
|
|
static int img_amend(int argc, char **argv)
|
|
{
|
|
Error *err = NULL;
|
|
int c, ret = 0;
|
|
char *options = NULL;
|
|
QemuOptsList *amend_opts = NULL;
|
|
QemuOpts *opts = NULL;
|
|
const char *fmt = NULL, *filename, *cache;
|
|
int flags;
|
|
bool writethrough;
|
|
bool quiet = false, progress = false;
|
|
BlockBackend *blk = NULL;
|
|
BlockDriverState *bs = NULL;
|
|
bool image_opts = false;
|
|
bool force = false;
|
|
|
|
cache = BDRV_DEFAULT_CACHE;
|
|
for (;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"force", no_argument, 0, OPTION_FORCE},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":ho:f:t:pq",
|
|
long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
|
|
switch (c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'o':
|
|
if (accumulate_options(&options, optarg) < 0) {
|
|
ret = -1;
|
|
goto out_no_progress;
|
|
}
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 't':
|
|
cache = optarg;
|
|
break;
|
|
case 'p':
|
|
progress = true;
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
case OPTION_FORCE:
|
|
force = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!options) {
|
|
error_exit("Must specify options (-o)");
|
|
}
|
|
|
|
if (quiet) {
|
|
progress = false;
|
|
}
|
|
qemu_progress_init(progress, 1.0);
|
|
|
|
filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
|
|
if (fmt && has_help_option(options)) {
|
|
/* If a format is explicitly specified (and possibly no filename is
|
|
* given), print option help here */
|
|
ret = print_amend_option_help(fmt);
|
|
goto out;
|
|
}
|
|
|
|
if (optind != argc - 1) {
|
|
error_report("Expecting one image file name");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
flags = BDRV_O_RDWR;
|
|
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid cache option: %s", cache);
|
|
goto out;
|
|
}
|
|
|
|
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
|
false);
|
|
if (!blk) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
fmt = bs->drv->format_name;
|
|
|
|
if (has_help_option(options)) {
|
|
/* If the format was auto-detected, print option help here */
|
|
ret = print_amend_option_help(fmt);
|
|
goto out;
|
|
}
|
|
|
|
if (!bs->drv->bdrv_amend_options) {
|
|
error_report("Format driver '%s' does not support option amendment",
|
|
fmt);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* Every driver supporting amendment must have amend_opts */
|
|
assert(bs->drv->amend_opts);
|
|
|
|
amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts);
|
|
opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
|
|
if (!qemu_opts_do_parse(opts, options, NULL, &err)) {
|
|
/* Try to parse options using the create options */
|
|
amend_opts = qemu_opts_append(amend_opts, bs->drv->create_opts);
|
|
qemu_opts_del(opts);
|
|
opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
|
|
if (qemu_opts_do_parse(opts, options, NULL, NULL)) {
|
|
error_append_hint(&err,
|
|
"This option is only supported for image creation\n");
|
|
}
|
|
|
|
error_report_err(err);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* In case the driver does not call amend_status_cb() */
|
|
qemu_progress_print(0.f, 0);
|
|
ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, force, &err);
|
|
qemu_progress_print(100.f, 0);
|
|
if (ret < 0) {
|
|
error_report_err(err);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
qemu_progress_end();
|
|
|
|
out_no_progress:
|
|
blk_unref(blk);
|
|
qemu_opts_del(opts);
|
|
qemu_opts_free(amend_opts);
|
|
g_free(options);
|
|
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
typedef struct BenchData {
|
|
BlockBackend *blk;
|
|
uint64_t image_size;
|
|
bool write;
|
|
int bufsize;
|
|
int step;
|
|
int nrreq;
|
|
int n;
|
|
int flush_interval;
|
|
bool drain_on_flush;
|
|
uint8_t *buf;
|
|
QEMUIOVector *qiov;
|
|
|
|
int in_flight;
|
|
bool in_flush;
|
|
uint64_t offset;
|
|
} BenchData;
|
|
|
|
static void bench_undrained_flush_cb(void *opaque, int ret)
|
|
{
|
|
if (ret < 0) {
|
|
error_report("Failed flush request: %s", strerror(-ret));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
static void bench_cb(void *opaque, int ret)
|
|
{
|
|
BenchData *b = opaque;
|
|
BlockAIOCB *acb;
|
|
|
|
if (ret < 0) {
|
|
error_report("Failed request: %s", strerror(-ret));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (b->in_flush) {
|
|
/* Just finished a flush with drained queue: Start next requests */
|
|
assert(b->in_flight == 0);
|
|
b->in_flush = false;
|
|
} else if (b->in_flight > 0) {
|
|
int remaining = b->n - b->in_flight;
|
|
|
|
b->n--;
|
|
b->in_flight--;
|
|
|
|
/* Time for flush? Drain queue if requested, then flush */
|
|
if (b->flush_interval && remaining % b->flush_interval == 0) {
|
|
if (!b->in_flight || !b->drain_on_flush) {
|
|
BlockCompletionFunc *cb;
|
|
|
|
if (b->drain_on_flush) {
|
|
b->in_flush = true;
|
|
cb = bench_cb;
|
|
} else {
|
|
cb = bench_undrained_flush_cb;
|
|
}
|
|
|
|
acb = blk_aio_flush(b->blk, cb, b);
|
|
if (!acb) {
|
|
error_report("Failed to issue flush request");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
if (b->drain_on_flush) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (b->n > b->in_flight && b->in_flight < b->nrreq) {
|
|
int64_t offset = b->offset;
|
|
/* blk_aio_* might look for completed I/Os and kick bench_cb
|
|
* again, so make sure this operation is counted by in_flight
|
|
* and b->offset is ready for the next submission.
|
|
*/
|
|
b->in_flight++;
|
|
b->offset += b->step;
|
|
b->offset %= b->image_size;
|
|
if (b->write) {
|
|
acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b);
|
|
} else {
|
|
acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b);
|
|
}
|
|
if (!acb) {
|
|
error_report("Failed to issue request");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int img_bench(int argc, char **argv)
|
|
{
|
|
int c, ret = 0;
|
|
const char *fmt = NULL, *filename;
|
|
bool quiet = false;
|
|
bool image_opts = false;
|
|
bool is_write = false;
|
|
int count = 75000;
|
|
int depth = 64;
|
|
int64_t offset = 0;
|
|
size_t bufsize = 4096;
|
|
int pattern = 0;
|
|
size_t step = 0;
|
|
int flush_interval = 0;
|
|
bool drain_on_flush = true;
|
|
int64_t image_size;
|
|
BlockBackend *blk = NULL;
|
|
BenchData data = {};
|
|
int flags = 0;
|
|
bool writethrough = false;
|
|
struct timeval t1, t2;
|
|
int i;
|
|
bool force_share = false;
|
|
size_t buf_size;
|
|
|
|
for (;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"pattern", required_argument, 0, OPTION_PATTERN},
|
|
{"no-drain", no_argument, 0, OPTION_NO_DRAIN},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":hc:d:f:ni:o:qs:S:t:wU", long_options,
|
|
NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
|
|
switch (c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'c':
|
|
{
|
|
unsigned long res;
|
|
|
|
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
|
|
error_report("Invalid request count specified");
|
|
return 1;
|
|
}
|
|
count = res;
|
|
break;
|
|
}
|
|
case 'd':
|
|
{
|
|
unsigned long res;
|
|
|
|
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
|
|
error_report("Invalid queue depth specified");
|
|
return 1;
|
|
}
|
|
depth = res;
|
|
break;
|
|
}
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'n':
|
|
flags |= BDRV_O_NATIVE_AIO;
|
|
break;
|
|
case 'i':
|
|
ret = bdrv_parse_aio(optarg, &flags);
|
|
if (ret < 0) {
|
|
error_report("Invalid aio option: %s", optarg);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
break;
|
|
case 'o':
|
|
{
|
|
offset = cvtnum("offset", optarg);
|
|
if (offset < 0) {
|
|
return 1;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case 'q':
|
|
quiet = true;
|
|
break;
|
|
case 's':
|
|
{
|
|
int64_t sval;
|
|
|
|
sval = cvtnum_full("buffer size", optarg, 0, INT_MAX);
|
|
if (sval < 0) {
|
|
return 1;
|
|
}
|
|
|
|
bufsize = sval;
|
|
break;
|
|
}
|
|
case 'S':
|
|
{
|
|
int64_t sval;
|
|
|
|
sval = cvtnum_full("step_size", optarg, 0, INT_MAX);
|
|
if (sval < 0) {
|
|
return 1;
|
|
}
|
|
|
|
step = sval;
|
|
break;
|
|
}
|
|
case 't':
|
|
ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough);
|
|
if (ret < 0) {
|
|
error_report("Invalid cache mode");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
break;
|
|
case 'w':
|
|
flags |= BDRV_O_RDWR;
|
|
is_write = true;
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_PATTERN:
|
|
{
|
|
unsigned long res;
|
|
|
|
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) {
|
|
error_report("Invalid pattern byte specified");
|
|
return 1;
|
|
}
|
|
pattern = res;
|
|
break;
|
|
}
|
|
case OPTION_FLUSH_INTERVAL:
|
|
{
|
|
unsigned long res;
|
|
|
|
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
|
|
error_report("Invalid flush interval specified");
|
|
return 1;
|
|
}
|
|
flush_interval = res;
|
|
break;
|
|
}
|
|
case OPTION_NO_DRAIN:
|
|
drain_on_flush = false;
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (optind != argc - 1) {
|
|
error_exit("Expecting one image file name");
|
|
}
|
|
filename = argv[argc - 1];
|
|
|
|
if (!is_write && flush_interval) {
|
|
error_report("--flush-interval is only available in write tests");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (flush_interval && flush_interval < depth) {
|
|
error_report("Flush interval can't be smaller than depth");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
|
force_share);
|
|
if (!blk) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
image_size = blk_getlength(blk);
|
|
if (image_size < 0) {
|
|
ret = image_size;
|
|
goto out;
|
|
}
|
|
|
|
data = (BenchData) {
|
|
.blk = blk,
|
|
.image_size = image_size,
|
|
.bufsize = bufsize,
|
|
.step = step ?: bufsize,
|
|
.nrreq = depth,
|
|
.n = count,
|
|
.offset = offset,
|
|
.write = is_write,
|
|
.flush_interval = flush_interval,
|
|
.drain_on_flush = drain_on_flush,
|
|
};
|
|
printf("Sending %d %s requests, %d bytes each, %d in parallel "
|
|
"(starting at offset %" PRId64 ", step size %d)\n",
|
|
data.n, data.write ? "write" : "read", data.bufsize, data.nrreq,
|
|
data.offset, data.step);
|
|
if (flush_interval) {
|
|
printf("Sending flush every %d requests\n", flush_interval);
|
|
}
|
|
|
|
buf_size = data.nrreq * data.bufsize;
|
|
data.buf = blk_blockalign(blk, buf_size);
|
|
memset(data.buf, pattern, data.nrreq * data.bufsize);
|
|
|
|
blk_register_buf(blk, data.buf, buf_size);
|
|
|
|
data.qiov = g_new(QEMUIOVector, data.nrreq);
|
|
for (i = 0; i < data.nrreq; i++) {
|
|
qemu_iovec_init(&data.qiov[i], 1);
|
|
qemu_iovec_add(&data.qiov[i],
|
|
data.buf + i * data.bufsize, data.bufsize);
|
|
}
|
|
|
|
gettimeofday(&t1, NULL);
|
|
bench_cb(&data, 0);
|
|
|
|
while (data.n > 0) {
|
|
main_loop_wait(false);
|
|
}
|
|
gettimeofday(&t2, NULL);
|
|
|
|
printf("Run completed in %3.3f seconds.\n",
|
|
(t2.tv_sec - t1.tv_sec)
|
|
+ ((double)(t2.tv_usec - t1.tv_usec) / 1000000));
|
|
|
|
out:
|
|
if (data.buf) {
|
|
blk_unregister_buf(blk, data.buf);
|
|
}
|
|
qemu_vfree(data.buf);
|
|
blk_unref(blk);
|
|
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum ImgBitmapAct {
|
|
BITMAP_ADD,
|
|
BITMAP_REMOVE,
|
|
BITMAP_CLEAR,
|
|
BITMAP_ENABLE,
|
|
BITMAP_DISABLE,
|
|
BITMAP_MERGE,
|
|
};
|
|
typedef struct ImgBitmapAction {
|
|
enum ImgBitmapAct act;
|
|
const char *src; /* only used for merge */
|
|
QSIMPLEQ_ENTRY(ImgBitmapAction) next;
|
|
} ImgBitmapAction;
|
|
|
|
static int img_bitmap(int argc, char **argv)
|
|
{
|
|
Error *err = NULL;
|
|
int c, ret = 1;
|
|
QemuOpts *opts = NULL;
|
|
const char *fmt = NULL, *src_fmt = NULL, *src_filename = NULL;
|
|
const char *filename, *bitmap;
|
|
BlockBackend *blk = NULL, *src = NULL;
|
|
BlockDriverState *bs = NULL, *src_bs = NULL;
|
|
bool image_opts = false;
|
|
int64_t granularity = 0;
|
|
bool add = false, merge = false;
|
|
QSIMPLEQ_HEAD(, ImgBitmapAction) actions;
|
|
ImgBitmapAction *act, *act_next;
|
|
const char *op;
|
|
|
|
QSIMPLEQ_INIT(&actions);
|
|
|
|
for (;;) {
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"add", no_argument, 0, OPTION_ADD},
|
|
{"remove", no_argument, 0, OPTION_REMOVE},
|
|
{"clear", no_argument, 0, OPTION_CLEAR},
|
|
{"enable", no_argument, 0, OPTION_ENABLE},
|
|
{"disable", no_argument, 0, OPTION_DISABLE},
|
|
{"merge", required_argument, 0, OPTION_MERGE},
|
|
{"granularity", required_argument, 0, 'g'},
|
|
{"source-file", required_argument, 0, 'b'},
|
|
{"source-format", required_argument, 0, 'F'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
c = getopt_long(argc, argv, ":b:f:F:g:h", long_options, NULL);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
|
|
switch (c) {
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'b':
|
|
src_filename = optarg;
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'F':
|
|
src_fmt = optarg;
|
|
break;
|
|
case 'g':
|
|
granularity = cvtnum("granularity", optarg);
|
|
if (granularity < 0) {
|
|
return 1;
|
|
}
|
|
break;
|
|
case OPTION_ADD:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_ADD;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
add = true;
|
|
break;
|
|
case OPTION_REMOVE:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_REMOVE;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
break;
|
|
case OPTION_CLEAR:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_CLEAR;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
break;
|
|
case OPTION_ENABLE:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_ENABLE;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
break;
|
|
case OPTION_DISABLE:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_DISABLE;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
break;
|
|
case OPTION_MERGE:
|
|
act = g_new0(ImgBitmapAction, 1);
|
|
act->act = BITMAP_MERGE;
|
|
act->src = optarg;
|
|
QSIMPLEQ_INSERT_TAIL(&actions, act, next);
|
|
merge = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (QSIMPLEQ_EMPTY(&actions)) {
|
|
error_report("Need at least one of --add, --remove, --clear, "
|
|
"--enable, --disable, or --merge");
|
|
goto out;
|
|
}
|
|
|
|
if (granularity && !add) {
|
|
error_report("granularity only supported with --add");
|
|
goto out;
|
|
}
|
|
if (src_fmt && !src_filename) {
|
|
error_report("-F only supported with -b");
|
|
goto out;
|
|
}
|
|
if (src_filename && !merge) {
|
|
error_report("Merge bitmap source file only supported with "
|
|
"--merge");
|
|
goto out;
|
|
}
|
|
|
|
if (optind != argc - 2) {
|
|
error_report("Expecting filename and bitmap name");
|
|
goto out;
|
|
}
|
|
|
|
filename = argv[optind];
|
|
bitmap = argv[optind + 1];
|
|
|
|
/*
|
|
* No need to open backing chains; we will be manipulating bitmaps
|
|
* directly in this image without reference to image contents.
|
|
*/
|
|
blk = img_open(image_opts, filename, fmt, BDRV_O_RDWR | BDRV_O_NO_BACKING,
|
|
false, false, false);
|
|
if (!blk) {
|
|
goto out;
|
|
}
|
|
bs = blk_bs(blk);
|
|
if (src_filename) {
|
|
src = img_open(false, src_filename, src_fmt, BDRV_O_NO_BACKING,
|
|
false, false, false);
|
|
if (!src) {
|
|
goto out;
|
|
}
|
|
src_bs = blk_bs(src);
|
|
} else {
|
|
src_bs = bs;
|
|
}
|
|
|
|
QSIMPLEQ_FOREACH_SAFE(act, &actions, next, act_next) {
|
|
switch (act->act) {
|
|
case BITMAP_ADD:
|
|
qmp_block_dirty_bitmap_add(bs->node_name, bitmap,
|
|
!!granularity, granularity, true, true,
|
|
false, false, &err);
|
|
op = "add";
|
|
break;
|
|
case BITMAP_REMOVE:
|
|
qmp_block_dirty_bitmap_remove(bs->node_name, bitmap, &err);
|
|
op = "remove";
|
|
break;
|
|
case BITMAP_CLEAR:
|
|
qmp_block_dirty_bitmap_clear(bs->node_name, bitmap, &err);
|
|
op = "clear";
|
|
break;
|
|
case BITMAP_ENABLE:
|
|
qmp_block_dirty_bitmap_enable(bs->node_name, bitmap, &err);
|
|
op = "enable";
|
|
break;
|
|
case BITMAP_DISABLE:
|
|
qmp_block_dirty_bitmap_disable(bs->node_name, bitmap, &err);
|
|
op = "disable";
|
|
break;
|
|
case BITMAP_MERGE:
|
|
do_dirty_bitmap_merge(bs->node_name, bitmap, src_bs->node_name,
|
|
act->src, &err);
|
|
op = "merge";
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
if (err) {
|
|
error_reportf_err(err, "Operation %s on bitmap %s failed: ",
|
|
op, bitmap);
|
|
goto out;
|
|
}
|
|
g_free(act);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
blk_unref(src);
|
|
blk_unref(blk);
|
|
qemu_opts_del(opts);
|
|
return ret;
|
|
}
|
|
|
|
#define C_BS 01
|
|
#define C_COUNT 02
|
|
#define C_IF 04
|
|
#define C_OF 010
|
|
#define C_SKIP 020
|
|
|
|
struct DdInfo {
|
|
unsigned int flags;
|
|
int64_t count;
|
|
};
|
|
|
|
struct DdIo {
|
|
int bsz; /* Block size */
|
|
char *filename;
|
|
uint8_t *buf;
|
|
int64_t offset;
|
|
};
|
|
|
|
struct DdOpts {
|
|
const char *name;
|
|
int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *);
|
|
unsigned int flag;
|
|
};
|
|
|
|
static int img_dd_bs(const char *arg,
|
|
struct DdIo *in, struct DdIo *out,
|
|
struct DdInfo *dd)
|
|
{
|
|
int64_t res;
|
|
|
|
res = cvtnum_full("bs", arg, 1, INT_MAX);
|
|
|
|
if (res < 0) {
|
|
return 1;
|
|
}
|
|
in->bsz = out->bsz = res;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_dd_count(const char *arg,
|
|
struct DdIo *in, struct DdIo *out,
|
|
struct DdInfo *dd)
|
|
{
|
|
dd->count = cvtnum("count", arg);
|
|
|
|
if (dd->count < 0) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_dd_if(const char *arg,
|
|
struct DdIo *in, struct DdIo *out,
|
|
struct DdInfo *dd)
|
|
{
|
|
in->filename = g_strdup(arg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_dd_of(const char *arg,
|
|
struct DdIo *in, struct DdIo *out,
|
|
struct DdInfo *dd)
|
|
{
|
|
out->filename = g_strdup(arg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_dd_skip(const char *arg,
|
|
struct DdIo *in, struct DdIo *out,
|
|
struct DdInfo *dd)
|
|
{
|
|
in->offset = cvtnum("skip", arg);
|
|
|
|
if (in->offset < 0) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_dd(int argc, char **argv)
|
|
{
|
|
int ret = 0;
|
|
char *arg = NULL;
|
|
char *tmp;
|
|
BlockDriver *drv = NULL, *proto_drv = NULL;
|
|
BlockBackend *blk1 = NULL, *blk2 = NULL;
|
|
QemuOpts *opts = NULL;
|
|
QemuOptsList *create_opts = NULL;
|
|
Error *local_err = NULL;
|
|
bool image_opts = false;
|
|
int c, i;
|
|
const char *out_fmt = "raw";
|
|
const char *fmt = NULL;
|
|
int64_t size = 0;
|
|
int64_t block_count = 0, out_pos, in_pos;
|
|
bool force_share = false;
|
|
struct DdInfo dd = {
|
|
.flags = 0,
|
|
.count = 0,
|
|
};
|
|
struct DdIo in = {
|
|
.bsz = 512, /* Block size is by default 512 bytes */
|
|
.filename = NULL,
|
|
.buf = NULL,
|
|
.offset = 0
|
|
};
|
|
struct DdIo out = {
|
|
.bsz = 512,
|
|
.filename = NULL,
|
|
.buf = NULL,
|
|
.offset = 0
|
|
};
|
|
|
|
const struct DdOpts options[] = {
|
|
{ "bs", img_dd_bs, C_BS },
|
|
{ "count", img_dd_count, C_COUNT },
|
|
{ "if", img_dd_if, C_IF },
|
|
{ "of", img_dd_of, C_OF },
|
|
{ "skip", img_dd_skip, C_SKIP },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
const struct option long_options[] = {
|
|
{ "help", no_argument, 0, 'h'},
|
|
{ "object", required_argument, 0, OPTION_OBJECT},
|
|
{ "image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{ "force-share", no_argument, 0, 'U'},
|
|
{ 0, 0, 0, 0 }
|
|
};
|
|
|
|
while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) {
|
|
if (c == EOF) {
|
|
break;
|
|
}
|
|
switch (c) {
|
|
case 'O':
|
|
out_fmt = optarg;
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case ':':
|
|
missing_argument(argv[optind - 1]);
|
|
break;
|
|
case '?':
|
|
unrecognized_option(argv[optind - 1]);
|
|
break;
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = optind; i < argc; i++) {
|
|
int j;
|
|
arg = g_strdup(argv[i]);
|
|
|
|
tmp = strchr(arg, '=');
|
|
if (tmp == NULL) {
|
|
error_report("unrecognized operand %s", arg);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
*tmp++ = '\0';
|
|
|
|
for (j = 0; options[j].name != NULL; j++) {
|
|
if (!strcmp(arg, options[j].name)) {
|
|
break;
|
|
}
|
|
}
|
|
if (options[j].name == NULL) {
|
|
error_report("unrecognized operand %s", arg);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (options[j].f(tmp, &in, &out, &dd) != 0) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
dd.flags |= options[j].flag;
|
|
g_free(arg);
|
|
arg = NULL;
|
|
}
|
|
|
|
if (!(dd.flags & C_IF && dd.flags & C_OF)) {
|
|
error_report("Must specify both input and output files");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
blk1 = img_open(image_opts, in.filename, fmt, 0, false, false,
|
|
force_share);
|
|
|
|
if (!blk1) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
drv = bdrv_find_format(out_fmt);
|
|
if (!drv) {
|
|
error_report("Unknown file format");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
proto_drv = bdrv_find_protocol(out.filename, true, &local_err);
|
|
|
|
if (!proto_drv) {
|
|
error_report_err(local_err);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (!drv->create_opts) {
|
|
error_report("Format driver '%s' does not support image creation",
|
|
drv->format_name);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (!proto_drv->create_opts) {
|
|
error_report("Protocol driver '%s' does not support image creation",
|
|
proto_drv->format_name);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
create_opts = qemu_opts_append(create_opts, drv->create_opts);
|
|
create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
|
|
|
|
opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
|
|
|
|
size = blk_getlength(blk1);
|
|
if (size < 0) {
|
|
error_report("Failed to get size for '%s'", in.filename);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz &&
|
|
dd.count * in.bsz < size) {
|
|
size = dd.count * in.bsz;
|
|
}
|
|
|
|
/* Overflow means the specified offset is beyond input image's size */
|
|
if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz ||
|
|
size < in.bsz * in.offset)) {
|
|
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort);
|
|
} else {
|
|
qemu_opt_set_number(opts, BLOCK_OPT_SIZE,
|
|
size - in.bsz * in.offset, &error_abort);
|
|
}
|
|
|
|
ret = bdrv_create(drv, out.filename, opts, &local_err);
|
|
if (ret < 0) {
|
|
error_reportf_err(local_err,
|
|
"%s: error while creating output image: ",
|
|
out.filename);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* TODO, we can't honour --image-opts for the target,
|
|
* since it needs to be given in a format compatible
|
|
* with the bdrv_create() call above which does not
|
|
* support image-opts style.
|
|
*/
|
|
blk2 = img_open_file(out.filename, NULL, out_fmt, BDRV_O_RDWR,
|
|
false, false, false);
|
|
|
|
if (!blk2) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz ||
|
|
size < in.offset * in.bsz)) {
|
|
/* We give a warning if the skip option is bigger than the input
|
|
* size and create an empty output disk image (i.e. like dd(1)).
|
|
*/
|
|
error_report("%s: cannot skip to specified offset", in.filename);
|
|
in_pos = size;
|
|
} else {
|
|
in_pos = in.offset * in.bsz;
|
|
}
|
|
|
|
in.buf = g_new(uint8_t, in.bsz);
|
|
|
|
for (out_pos = 0; in_pos < size; block_count++) {
|
|
int in_ret, out_ret;
|
|
|
|
if (in_pos + in.bsz > size) {
|
|
in_ret = blk_pread(blk1, in_pos, in.buf, size - in_pos);
|
|
} else {
|
|
in_ret = blk_pread(blk1, in_pos, in.buf, in.bsz);
|
|
}
|
|
if (in_ret < 0) {
|
|
error_report("error while reading from input image file: %s",
|
|
strerror(-in_ret));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
in_pos += in_ret;
|
|
|
|
out_ret = blk_pwrite(blk2, out_pos, in.buf, in_ret, 0);
|
|
|
|
if (out_ret < 0) {
|
|
error_report("error while writing to output image file: %s",
|
|
strerror(-out_ret));
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
out_pos += out_ret;
|
|
}
|
|
|
|
out:
|
|
g_free(arg);
|
|
qemu_opts_del(opts);
|
|
qemu_opts_free(create_opts);
|
|
blk_unref(blk1);
|
|
blk_unref(blk2);
|
|
g_free(in.filename);
|
|
g_free(out.filename);
|
|
g_free(in.buf);
|
|
g_free(out.buf);
|
|
|
|
if (ret) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void dump_json_block_measure_info(BlockMeasureInfo *info)
|
|
{
|
|
GString *str;
|
|
QObject *obj;
|
|
Visitor *v = qobject_output_visitor_new(&obj);
|
|
|
|
visit_type_BlockMeasureInfo(v, NULL, &info, &error_abort);
|
|
visit_complete(v, &obj);
|
|
str = qobject_to_json_pretty(obj, true);
|
|
assert(str != NULL);
|
|
printf("%s\n", str->str);
|
|
qobject_unref(obj);
|
|
visit_free(v);
|
|
g_string_free(str, true);
|
|
}
|
|
|
|
static int img_measure(int argc, char **argv)
|
|
{
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, 0, 'h'},
|
|
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
|
{"object", required_argument, 0, OPTION_OBJECT},
|
|
{"output", required_argument, 0, OPTION_OUTPUT},
|
|
{"size", required_argument, 0, OPTION_SIZE},
|
|
{"force-share", no_argument, 0, 'U'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
OutputFormat output_format = OFORMAT_HUMAN;
|
|
BlockBackend *in_blk = NULL;
|
|
BlockDriver *drv;
|
|
const char *filename = NULL;
|
|
const char *fmt = NULL;
|
|
const char *out_fmt = "raw";
|
|
char *options = NULL;
|
|
char *snapshot_name = NULL;
|
|
bool force_share = false;
|
|
QemuOpts *opts = NULL;
|
|
QemuOpts *object_opts = NULL;
|
|
QemuOpts *sn_opts = NULL;
|
|
QemuOptsList *create_opts = NULL;
|
|
bool image_opts = false;
|
|
uint64_t img_size = UINT64_MAX;
|
|
BlockMeasureInfo *info = NULL;
|
|
Error *local_err = NULL;
|
|
int ret = 1;
|
|
int c;
|
|
|
|
while ((c = getopt_long(argc, argv, "hf:O:o:l:U",
|
|
long_options, NULL)) != -1) {
|
|
switch (c) {
|
|
case '?':
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'O':
|
|
out_fmt = optarg;
|
|
break;
|
|
case 'o':
|
|
if (accumulate_options(&options, optarg) < 0) {
|
|
goto out;
|
|
}
|
|
break;
|
|
case 'l':
|
|
if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
|
|
sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts,
|
|
optarg, false);
|
|
if (!sn_opts) {
|
|
error_report("Failed in parsing snapshot param '%s'",
|
|
optarg);
|
|
goto out;
|
|
}
|
|
} else {
|
|
snapshot_name = optarg;
|
|
}
|
|
break;
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
image_opts = true;
|
|
break;
|
|
case OPTION_OUTPUT:
|
|
if (!strcmp(optarg, "json")) {
|
|
output_format = OFORMAT_JSON;
|
|
} else if (!strcmp(optarg, "human")) {
|
|
output_format = OFORMAT_HUMAN;
|
|
} else {
|
|
error_report("--output must be used with human or json "
|
|
"as argument.");
|
|
goto out;
|
|
}
|
|
break;
|
|
case OPTION_SIZE:
|
|
{
|
|
int64_t sval;
|
|
|
|
sval = cvtnum("image size", optarg);
|
|
if (sval < 0) {
|
|
goto out;
|
|
}
|
|
img_size = (uint64_t)sval;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc - optind > 1) {
|
|
error_report("At most one filename argument is allowed.");
|
|
goto out;
|
|
} else if (argc - optind == 1) {
|
|
filename = argv[optind];
|
|
}
|
|
|
|
if (!filename && (image_opts || fmt || snapshot_name || sn_opts)) {
|
|
error_report("--image-opts, -f, and -l require a filename argument.");
|
|
goto out;
|
|
}
|
|
if (filename && img_size != UINT64_MAX) {
|
|
error_report("--size N cannot be used together with a filename.");
|
|
goto out;
|
|
}
|
|
if (!filename && img_size == UINT64_MAX) {
|
|
error_report("Either --size N or one filename must be specified.");
|
|
goto out;
|
|
}
|
|
|
|
if (filename) {
|
|
in_blk = img_open(image_opts, filename, fmt, 0,
|
|
false, false, force_share);
|
|
if (!in_blk) {
|
|
goto out;
|
|
}
|
|
|
|
if (sn_opts) {
|
|
bdrv_snapshot_load_tmp(blk_bs(in_blk),
|
|
qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
|
|
qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
|
|
&local_err);
|
|
} else if (snapshot_name != NULL) {
|
|
bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(in_blk),
|
|
snapshot_name, &local_err);
|
|
}
|
|
if (local_err) {
|
|
error_reportf_err(local_err, "Failed to load snapshot: ");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
drv = bdrv_find_format(out_fmt);
|
|
if (!drv) {
|
|
error_report("Unknown file format '%s'", out_fmt);
|
|
goto out;
|
|
}
|
|
if (!drv->create_opts) {
|
|
error_report("Format driver '%s' does not support image creation",
|
|
drv->format_name);
|
|
goto out;
|
|
}
|
|
|
|
create_opts = qemu_opts_append(create_opts, drv->create_opts);
|
|
create_opts = qemu_opts_append(create_opts, bdrv_file.create_opts);
|
|
opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
|
|
if (options) {
|
|
if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) {
|
|
error_report_err(local_err);
|
|
error_report("Invalid options for file format '%s'", out_fmt);
|
|
goto out;
|
|
}
|
|
}
|
|
if (img_size != UINT64_MAX) {
|
|
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort);
|
|
}
|
|
|
|
info = bdrv_measure(drv, opts, in_blk ? blk_bs(in_blk) : NULL, &local_err);
|
|
if (local_err) {
|
|
error_report_err(local_err);
|
|
goto out;
|
|
}
|
|
|
|
if (output_format == OFORMAT_HUMAN) {
|
|
printf("required size: %" PRIu64 "\n", info->required);
|
|
printf("fully allocated size: %" PRIu64 "\n", info->fully_allocated);
|
|
if (info->has_bitmaps) {
|
|
printf("bitmaps size: %" PRIu64 "\n", info->bitmaps);
|
|
}
|
|
} else {
|
|
dump_json_block_measure_info(info);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
qapi_free_BlockMeasureInfo(info);
|
|
qemu_opts_del(object_opts);
|
|
qemu_opts_del(opts);
|
|
qemu_opts_del(sn_opts);
|
|
qemu_opts_free(create_opts);
|
|
g_free(options);
|
|
blk_unref(in_blk);
|
|
return ret;
|
|
}
|
|
|
|
static const img_cmd_t img_cmds[] = {
|
|
#define DEF(option, callback, arg_string) \
|
|
{ option, callback },
|
|
#include "qemu-img-cmds.h"
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#undef DEF
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{ NULL, NULL, },
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};
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int main(int argc, char **argv)
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{
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const img_cmd_t *cmd;
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const char *cmdname;
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int c;
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static const struct option long_options[] = {
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'V'},
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{"trace", required_argument, NULL, 'T'},
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{0, 0, 0, 0}
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};
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#ifdef CONFIG_POSIX
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signal(SIGPIPE, SIG_IGN);
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#endif
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socket_init();
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error_init(argv[0]);
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module_call_init(MODULE_INIT_TRACE);
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qemu_init_exec_dir(argv[0]);
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qemu_init_main_loop(&error_fatal);
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qcrypto_init(&error_fatal);
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module_call_init(MODULE_INIT_QOM);
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bdrv_init();
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if (argc < 2) {
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error_exit("Not enough arguments");
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}
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qemu_add_opts(&qemu_source_opts);
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qemu_add_opts(&qemu_trace_opts);
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while ((c = getopt_long(argc, argv, "+:hVT:", long_options, NULL)) != -1) {
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switch (c) {
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case ':':
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missing_argument(argv[optind - 1]);
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return 0;
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case '?':
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unrecognized_option(argv[optind - 1]);
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return 0;
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case 'h':
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help();
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return 0;
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case 'V':
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printf(QEMU_IMG_VERSION);
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return 0;
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case 'T':
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trace_opt_parse(optarg);
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break;
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}
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}
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cmdname = argv[optind];
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/* reset getopt_long scanning */
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argc -= optind;
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if (argc < 1) {
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return 0;
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}
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argv += optind;
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qemu_reset_optind();
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if (!trace_init_backends()) {
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exit(1);
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}
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trace_init_file();
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qemu_set_log(LOG_TRACE);
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/* find the command */
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for (cmd = img_cmds; cmd->name != NULL; cmd++) {
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if (!strcmp(cmdname, cmd->name)) {
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return cmd->handler(argc, argv);
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}
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}
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/* not found */
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error_exit("Command not found: %s", cmdname);
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}
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