| /* |
| * QEMU disk image utility |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include <getopt.h> |
| |
| #include "qemu-version.h" |
| #include "qapi/error.h" |
| #include "qapi/qapi-visit-block-core.h" |
| #include "qapi/qobject-output-visitor.h" |
| #include "qapi/qmp/qjson.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qapi/qmp/qstring.h" |
| #include "qemu/cutils.h" |
| #include "qemu/config-file.h" |
| #include "qemu/option.h" |
| #include "qemu/error-report.h" |
| #include "qemu/log.h" |
| #include "qom/object_interfaces.h" |
| #include "sysemu/sysemu.h" |
| #include "sysemu/block-backend.h" |
| #include "block/block_int.h" |
| #include "block/blockjob.h" |
| #include "block/qapi.h" |
| #include "crypto/init.h" |
| #include "trace/control.h" |
| |
| #define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \ |
| "\n" QEMU_COPYRIGHT "\n" |
| |
| typedef struct img_cmd_t { |
| const char *name; |
| int (*handler)(int argc, char **argv); |
| } img_cmd_t; |
| |
| enum { |
| OPTION_OUTPUT = 256, |
| OPTION_BACKING_CHAIN = 257, |
| OPTION_OBJECT = 258, |
| OPTION_IMAGE_OPTS = 259, |
| OPTION_PATTERN = 260, |
| OPTION_FLUSH_INTERVAL = 261, |
| OPTION_NO_DRAIN = 262, |
| OPTION_TARGET_IMAGE_OPTS = 263, |
| OPTION_SIZE = 264, |
| OPTION_PREALLOCATION = 265, |
| OPTION_SHRINK = 266, |
| }; |
| |
| typedef enum OutputFormat { |
| OFORMAT_JSON, |
| OFORMAT_HUMAN, |
| } OutputFormat; |
| |
| /* Default to cache=writeback as data integrity is not important for qemu-img */ |
| #define BDRV_DEFAULT_CACHE "writeback" |
| |
| static void format_print(void *opaque, const char *name) |
| { |
| printf(" %s", name); |
| } |
| |
| static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| error_vreport(fmt, ap); |
| va_end(ap); |
| |
| error_printf("Try 'qemu-img --help' for more information\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void QEMU_NORETURN missing_argument(const char *option) |
| { |
| error_exit("missing argument for option '%s'", option); |
| } |
| |
| static void QEMU_NORETURN unrecognized_option(const char *option) |
| { |
| error_exit("unrecognized option '%s'", option); |
| } |
| |
| /* Please keep in synch with qemu-img.texi */ |
| static void QEMU_NORETURN help(void) |
| { |
| const char *help_msg = |
| QEMU_IMG_VERSION |
| "usage: qemu-img [standard options] command [command options]\n" |
| "QEMU disk image utility\n" |
| "\n" |
| " '-h', '--help' display this help and exit\n" |
| " '-V', '--version' output version information and exit\n" |
| " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
| " specify tracing options\n" |
| "\n" |
| "Command syntax:\n" |
| #define DEF(option, callback, arg_string) \ |
| " " arg_string "\n" |
| #include "qemu-img-cmds.h" |
| #undef DEF |
| "\n" |
| "Command parameters:\n" |
| " 'filename' is a disk image filename\n" |
| " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" |
| " manual page for a description of the object properties. The most common\n" |
| " object type is a 'secret', which is used to supply passwords and/or\n" |
| " encryption keys.\n" |
| " 'fmt' is the disk image format. It is guessed automatically in most cases\n" |
| " 'cache' is the cache mode used to write the output disk image, the valid\n" |
| " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" |
| " 'directsync' and 'unsafe' (default for convert)\n" |
| " 'src_cache' is the cache mode used to read input disk images, the valid\n" |
| " options are the same as for the 'cache' option\n" |
| " 'size' is the disk image size in bytes. Optional suffixes\n" |
| " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" |
| " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" |
| " supported. 'b' is ignored.\n" |
| " 'output_filename' is the destination disk image filename\n" |
| " 'output_fmt' is the destination format\n" |
| " 'options' is a comma separated list of format specific options in a\n" |
| " name=value format. Use -o ? for an overview of the options supported by the\n" |
| " used format\n" |
| " 'snapshot_param' is param used for internal snapshot, format\n" |
| " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
| " '[ID_OR_NAME]'\n" |
| " '-c' indicates that target image must be compressed (qcow format only)\n" |
| " '-u' allows unsafe backing chains. For rebasing, it is assumed that old and\n" |
| " new backing file match exactly. The image doesn't need a working\n" |
| " backing file before rebasing in this case (useful for renaming the\n" |
| " backing file). For image creation, allow creating without attempting\n" |
| " to open the backing file.\n" |
| " '-h' with or without a command shows this help and lists the supported formats\n" |
| " '-p' show progress of command (only certain commands)\n" |
| " '-q' use Quiet mode - do not print any output (except errors)\n" |
| " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" |
| " contain only zeros for qemu-img to create a sparse image during\n" |
| " conversion. If the number of bytes is 0, the source will not be scanned for\n" |
| " unallocated or zero sectors, and the destination image will always be\n" |
| " fully allocated\n" |
| " '--output' takes the format in which the output must be done (human or json)\n" |
| " '-n' skips the target volume creation (useful if the volume is created\n" |
| " prior to running qemu-img)\n" |
| "\n" |
| "Parameters to check subcommand:\n" |
| " '-r' tries to repair any inconsistencies that are found during the check.\n" |
| " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" |
| " kinds of errors, with a higher risk of choosing the wrong fix or\n" |
| " hiding corruption that has already occurred.\n" |
| "\n" |
| "Parameters to convert subcommand:\n" |
| " '-m' specifies how many coroutines work in parallel during the convert\n" |
| " process (defaults to 8)\n" |
| " '-W' allow to write to the target out of order rather than sequential\n" |
| "\n" |
| "Parameters to snapshot subcommand:\n" |
| " 'snapshot' is the name of the snapshot to create, apply or delete\n" |
| " '-a' applies a snapshot (revert disk to saved state)\n" |
| " '-c' creates a snapshot\n" |
| " '-d' deletes a snapshot\n" |
| " '-l' lists all snapshots in the given image\n" |
| "\n" |
| "Parameters to compare subcommand:\n" |
| " '-f' first image format\n" |
| " '-F' second image format\n" |
| " '-s' run in Strict mode - fail on different image size or sector allocation\n" |
| "\n" |
| "Parameters to dd subcommand:\n" |
| " 'bs=BYTES' read and write up to BYTES bytes at a time " |
| "(default: 512)\n" |
| " 'count=N' copy only N input blocks\n" |
| " 'if=FILE' read from FILE\n" |
| " 'of=FILE' write to FILE\n" |
| " 'skip=N' skip N bs-sized blocks at the start of input\n"; |
| |
| printf("%s\nSupported formats:", help_msg); |
| bdrv_iterate_format(format_print, NULL, false); |
| printf("\n\n" QEMU_HELP_BOTTOM "\n"); |
| exit(EXIT_SUCCESS); |
| } |
| |
| static QemuOptsList qemu_object_opts = { |
| .name = "object", |
| .implied_opt_name = "qom-type", |
| .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), |
| .desc = { |
| { } |
| }, |
| }; |
| |
| static QemuOptsList qemu_source_opts = { |
| .name = "source", |
| .implied_opt_name = "file", |
| .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), |
| .desc = { |
| { } |
| }, |
| }; |
| |
| static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) |
| { |
| int ret = 0; |
| if (!quiet) { |
| va_list args; |
| va_start(args, fmt); |
| ret = vprintf(fmt, args); |
| va_end(args); |
| } |
| return ret; |
| } |
| |
| |
| static int print_block_option_help(const char *filename, const char *fmt) |
| { |
| BlockDriver *drv, *proto_drv; |
| QemuOptsList *create_opts = NULL; |
| Error *local_err = NULL; |
| |
| /* Find driver and parse its options */ |
| drv = bdrv_find_format(fmt); |
| if (!drv) { |
| error_report("Unknown file format '%s'", fmt); |
| return 1; |
| } |
| |
| if (!drv->create_opts) { |
| error_report("Format driver '%s' does not support image creation", fmt); |
| return 1; |
| } |
| |
| create_opts = qemu_opts_append(create_opts, drv->create_opts); |
| if (filename) { |
| proto_drv = bdrv_find_protocol(filename, true, &local_err); |
| if (!proto_drv) { |
| error_report_err(local_err); |
| qemu_opts_free(create_opts); |
| return 1; |
| } |
| if (!proto_drv->create_opts) { |
| error_report("Protocol driver '%s' does not support image creation", |
| proto_drv->format_name); |
| qemu_opts_free(create_opts); |
| return 1; |
| } |
| create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); |
| } |
| |
| printf("Supported options:\n"); |
| qemu_opts_print_help(create_opts, false); |
| qemu_opts_free(create_opts); |
| return 0; |
| } |
| |
| |
| static BlockBackend *img_open_opts(const char *optstr, |
| QemuOpts *opts, int flags, bool writethrough, |
| bool quiet, bool force_share) |
| { |
| QDict *options; |
| Error *local_err = NULL; |
| BlockBackend *blk; |
| options = qemu_opts_to_qdict(opts, NULL); |
| if (force_share) { |
| if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) |
| && strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) { |
| error_report("--force-share/-U conflicts with image options"); |
| qobject_unref(options); |
| return NULL; |
| } |
| qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on"); |
| } |
| blk = blk_new_open(NULL, NULL, options, flags, &local_err); |
| if (!blk) { |
| error_reportf_err(local_err, "Could not open '%s': ", optstr); |
| return NULL; |
| } |
| blk_set_enable_write_cache(blk, !writethrough); |
| |
| return blk; |
| } |
| |
| static BlockBackend *img_open_file(const char *filename, |
| QDict *options, |
| const char *fmt, int flags, |
| bool writethrough, bool quiet, |
| bool force_share) |
| { |
| BlockBackend *blk; |
| Error *local_err = NULL; |
| |
| if (!options) { |
| options = qdict_new(); |
| } |
| if (fmt) { |
| qdict_put_str(options, "driver", fmt); |
| } |
| |
| if (force_share) { |
| qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); |
| } |
| blk = blk_new_open(filename, NULL, options, flags, &local_err); |
| if (!blk) { |
| error_reportf_err(local_err, "Could not open '%s': ", filename); |
| return NULL; |
| } |
| blk_set_enable_write_cache(blk, !writethrough); |
| |
| return blk; |
| } |
| |
| |
| static int img_add_key_secrets(void *opaque, |
| const char *name, const char *value, |
| Error **errp) |
| { |
| QDict *options = opaque; |
| |
| if (g_str_has_suffix(name, "key-secret")) { |
| qdict_put_str(options, name, value); |
| } |
| |
| 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) |
| { |
| Error *err = NULL; |
| |
| if (base_filename) { |
| qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); |
| if (err) { |
| error_report("Backing file not supported for file format '%s'", |
| fmt); |
| error_free(err); |
| return -1; |
| } |
| } |
| if (base_fmt) { |
| qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); |
| if (err) { |
| error_report("Backing file format not supported for file " |
| "format '%s'", fmt); |
| error_free(err); |
| return -1; |
| } |
| } |
| return 0; |
| } |
| |
| static int64_t cvtnum(const char *s) |
| { |
| int err; |
| uint64_t value; |
| |
| err = qemu_strtosz(s, NULL, &value); |
| if (err < 0) { |
| return err; |
| } |
| if (value > INT64_MAX) { |
| return -ERANGE; |
| } |
| return value; |
| } |
| |
| 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 (!is_valid_option_list(optarg)) { |
| error_report("Invalid option list: %s", optarg); |
| goto fail; |
| } |
| if (!options) { |
| options = g_strdup(optarg); |
| } else { |
| char *old_options = options; |
| options = g_strdup_printf("%s,%s", options, optarg); |
| g_free(old_options); |
| } |
| break; |
| case 'q': |
| quiet = true; |
| break; |
| case 'u': |
| flags |= BDRV_O_NO_BACKING; |
| break; |
| case OPTION_OBJECT: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| goto fail; |
| } |
| } 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++; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| goto fail; |
| } |
| |
| /* Get image size, if specified */ |
| if (optind < argc) { |
| int64_t sval; |
| |
| sval = cvtnum(argv[optind++]); |
| if (sval < 0) { |
| if (sval == -ERANGE) { |
| error_report("Image size must be less than 8 EiB!"); |
| } else { |
| error_report("Invalid image size specified! You may use k, M, " |
| "G, T, P or E suffixes for "); |
| error_report("kilobytes, megabytes, gigabytes, terabytes, " |
| "petabytes and exabytes."); |
| } |
| 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) |
| { |
| QString *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); |
| assert(str != NULL); |
| qprintf(quiet, "%s\n", qstring_get_str(str)); |
| qobject_unref(obj); |
| visit_free(v); |
| qobject_unref(str); |
| } |
| |
| 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 != 0; |
| check->leaks_fixed = result.leaks_fixed; |
| check->has_leaks_fixed = result.leaks != 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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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; |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| 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; |
| |
| leaks_fixed = check->leaks_fixed; |
| corruptions_fixed = check->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); |
| } |
| |
| ret = collect_image_check(bs, check, filename, fmt, 0); |
| |
| check->leaks_fixed = leaks_fixed; |
| check->corruptions_fixed = 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) |
| { |
| AioContext *aio_context = blk_get_aio_context(job->blk); |
| int ret = 0; |
| |
| aio_context_acquire(aio_context); |
| job_ref(&job->job); |
| do { |
| float progress = 0.0f; |
| aio_poll(aio_context, true); |
| if (job->job.progress_total) { |
| progress = (float)job->job.progress_current / |
| job->job.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; |
| |
| 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:dpq", |
| 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 OPTION_OBJECT: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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++]; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| return 1; |
| } |
| |
| 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 = backing_bs(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, 0, |
| 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 && bs->drv->bdrv_make_empty) { |
| ret = bs->drv->bdrv_make_empty(bs); |
| if (ret) { |
| error_setg_errno(&local_err, -ret, "Could not empty %s", |
| filename); |
| 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 consequtive 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, 512); |
| for(i = 1; i < n; i++) { |
| buf += 512; |
| if (is_zero != buffer_is_zero(buf, 512)) { |
| 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 * 1024 * 1024) |
| |
| /* |
| * 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 |
| * 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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| ret = 2; |
| goto out4; |
| } |
| } 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++]; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| ret = 2; |
| goto out4; |
| } |
| |
| /* 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(); |
| out4: |
| return ret; |
| } |
| |
| enum ImgConvertBlockStatus { |
| BLK_DATA, |
| BLK_ZERO, |
| BLK_BACKING_FILE, |
| }; |
| |
| #define MAX_COROUTINES 16 |
| |
| typedef struct ImgConvertState { |
| BlockBackend **src; |
| int64_t *src_sectors; |
| 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 unallocated_blocks_are_zero; |
| bool target_has_backing; |
| int64_t target_backing_sectors; /* negative if unknown */ |
| bool wr_in_order; |
| bool copy_range; |
| 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 = s->unallocated_blocks_are_zero; |
| } 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) { |
| int64_t count = n * BDRV_SECTOR_SIZE; |
| |
| if (s->target_has_backing) { |
| |
| ret = bdrv_block_status(blk_bs(s->src[src_cur]), |
| (sector_num - src_cur_offset) * |
| BDRV_SECTOR_SIZE, |
| count, &count, NULL, NULL); |
| } else { |
| ret = bdrv_block_status_above(blk_bs(s->src[src_cur]), NULL, |
| (sector_num - src_cur_offset) * |
| BDRV_SECTOR_SIZE, |
| count, &count, NULL, NULL); |
| } |
| if (ret < 0) { |
| error_report("error while reading block status of sector %" PRId64 |
| ": %s", sector_num, strerror(-ret)); |
| return ret; |
| } |
| n = DIV_ROUND_UP(count, BDRV_SECTOR_SIZE); |
| |
| 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) |
| { |
| int n, ret; |
| QEMUIOVector qiov; |
| |
| assert(nb_sectors <= s->buf_sectors); |
| while (nb_sectors > 0) { |
| BlockBackend *blk; |
| int src_cur; |
| int64_t bs_sectors, src_cur_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]; |
| |
| n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); |
| qemu_iovec_init_buf(&qiov, buf, n << BDRV_SECTOR_BITS); |
| |
| ret = blk_co_preadv( |
| blk, (sector_num - src_cur_offset) << BDRV_SECTOR_BITS, |
| n << BDRV_SECTOR_BITS, &qiov, 0); |
| if (ret < 0) { |
| 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; |
| QEMUIOVector qiov; |
| |
| 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))) |
| { |
| qemu_iovec_init_buf(&qiov, buf, n << BDRV_SECTOR_BITS); |
| |
| ret = blk_co_pwritev(s->target, sector_num << BDRV_SECTOR_BITS, |
| n << BDRV_SECTOR_BITS, &qiov, 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 sector %" PRId64 |
| ": %s", sector_num, 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 sector %" PRId64 |
| ": %s", sector_num, 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 */ |
| s->has_zero_init = s->min_sparse && !s->target_has_backing |
| ? bdrv_has_zero_init(blk_bs(s->target)) |
| : false; |
| |
| if (!s->has_zero_init && !s->target_has_backing && |
| bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) |
| { |
| ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK); |
| if (ret == 0) { |
| s->has_zero_init = true; |
| } |
| } |
| |
| /* 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; |
| } |
| |
| #define MAX_BUF_SECTORS 32768 |
| |
| static int img_convert(int argc, char **argv) |
| { |
| int c, bs_i, flags, src_flags = 0; |
| 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; |
| 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, quiet = false, 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; |
| |
| 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}, |
| {0, 0, 0, 0} |
| }; |
| c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm: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 '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 'o': |
| if (!is_valid_option_list(optarg)) { |
| error_report("Invalid option list: %s", optarg); |
| goto fail_getopt; |
| } |
| if (!options) { |
| options = g_strdup(optarg); |
| } else { |
| char *old_options = options; |
| options = g_strdup_printf("%s,%s", options, optarg); |
| g_free(old_options); |
| } |
| 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(optarg); |
| if (sval < 0 || sval & (BDRV_SECTOR_SIZE - 1) || |
| 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': |
| 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 OPTION_OBJECT: { |
| QemuOpts *object_opts; |
| object_opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!object_opts) { |
| goto fail_getopt; |
| } |
| break; |
| } |
| case OPTION_IMAGE_OPTS: |
| image_opts = true; |
| break; |
| case OPTION_TARGET_IMAGE_OPTS: |
| tgt_image_opts = true; |
| break; |
| } |
| } |
| |
| if (!out_fmt && !tgt_image_opts) { |
| out_fmt = "raw"; |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| 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 (tgt_image_opts && !skip_create) { |
| error_report("--target-image-opts 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 (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); |
| |
| for (bs_i = 0; bs_i < s.src_num; bs_i++) { |
| s.src[bs_i] = img_open(image_opts, argv[optind + bs_i], |
| fmt, src_flags, src_writethrough, 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; |
| } |
| 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) { |
| qemu_opts_do_parse(opts, options, NULL, &local_err); |
| if (local_err) { |
| error_report_err(local_err); |
| ret = -1; |
| goto out; |
| } |
| } |
| |
| qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s.total_sectors * 512, |
| &error_abort); |
| ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); |
| 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.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; |
| } |
| |
| /* 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 && !drv->bdrv_co_pwritev_compressed) { |
| 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; |
| } |
| } |
| |
| /* |
| * 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); |
| } |
| |
| if (!skip_create) { |
| /* 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; |
| } |
| } |
| |
| 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 (skip_create) { |
| s.target = img_open(tgt_image_opts, out_filename, out_fmt, |
| flags, writethrough, 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, 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 (s.compressed && !out_bs->drv->bdrv_co_pwritev_compressed) { |
| 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) { |
| /* 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(out_bs->backing->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; |
| s.unallocated_blocks_are_zero = bdi.unallocated_blocks_are_zero; |
| } |
| |
| ret = convert_do_copy(&s); |
| out: |
| if (!ret) { |
| qemu_progress_print(100, 0); |
| } |
| qemu_progress_end(); |
| qemu_opts_del(opts); |
| qemu_opts_free(create_opts); |
| qemu_opts_del(sn_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); |
| fail_getopt: |
| 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(fprintf, stdout, NULL); |
| printf("\n"); |
| for(i = 0; i < nb_sns; i++) { |
| sn = &sn_tab[i]; |
| bdrv_snapshot_dump(fprintf, stdout, sn); |
| printf("\n"); |
| } |
| g_free(sn_tab); |
| } |
| |
| static void dump_json_image_info_list(ImageInfoList *list) |
| { |
| QString *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); |
| assert(str != NULL); |
| printf("%s\n", qstring_get_str(str)); |
| qobject_unref(obj); |
| visit_free(v); |
| qobject_unref(str); |
| } |
| |
| static void dump_json_image_info(ImageInfo *info) |
| { |
| QString *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); |
| assert(str != NULL); |
| printf("%s\n", qstring_get_str(str)); |
| qobject_unref(obj); |
| visit_free(v); |
| qobject_unref(str); |
| } |
| |
| 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(fprintf, stdout, 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 **last = &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; |
| ImageInfoList *elem; |
| |
| 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; |
| } |
| |
| elem = g_new0(ImageInfoList, 1); |
| elem->value = info; |
| *last = elem; |
| last = &elem->next; |
| |
| blk_unref(blk); |
| |
| filename = fmt = NULL; |
| 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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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; |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| 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("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," |
| " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", |
| (e->start == 0 ? "[" : ",\n"), |
| e->start, e->length, e->depth, |
| e->zero ? "true" : "false", |
| e->data ? "true" : "false"); |
| if (e->has_offset) { |
| printf(", \"offset\": %"PRId64"", e->offset); |
| } |
| putchar('}'); |
| |
| if (!next) { |
| printf("]\n"); |
| } |
| 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 (;;) { |
| 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 = backing_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, |
| .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->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; |
| |
| 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'}, |
| {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_OBJECT: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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; |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| 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"); |
| } |
| |
| length = blk_getlength(blk); |
| while (curr.start + curr.length < length) { |
| int64_t offset = curr.start + curr.length; |
| int64_t n; |
| |
| /* Probe up to 1 GiB at a time. */ |
| n = MIN(1 << 30, 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); |
| |
| 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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } break; |
| case OPTION_IMAGE_OPTS: |
| image_opts = true; |
| break; |
| } |
| } |
| |
| if (optind != argc - 1) { |
| error_exit("Expecting one image file name"); |
| } |
| filename = argv[optind++]; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| return 1; |
| } |
| |
| /* 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; |
| 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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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++]; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| return 1; |
| } |
| |
| 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); |
| |
| 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) { |
| char backing_name[PATH_MAX]; |
| QDict *options = NULL; |
| |
| if (bs->backing_format[0] != '\0') { |
| options = qdict_new(); |
| qdict_put_str(options, "driver", bs->backing_format); |
| } |
| |
| if (force_share) { |
| if (!options) { |
| options = qdict_new(); |
| } |
| qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); |
| } |
| bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); |
| blk_old_backing = blk_new_open(backing_name, NULL, |
| options, src_flags, &local_err); |
| if (!blk_old_backing) { |
| error_reportf_err(local_err, |
| "Could not open old backing file '%s': ", |
| backing_name); |
| ret = -1; |
| goto out; |
| } |
| |
| 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) { |
| error_reportf_err(local_err, |
| "Could not resolve backing filename: "); |
| ret = -1; |
| goto out; |
| } |
| |
| 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; |
| 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; |
| } |
| 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) { |
| /* 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(bs, 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); |
| } 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)) |
| { |
| 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(bs, out_baseimg, out_basefmt); |
| } else { |
| ret = bdrv_change_backing_file(bs, NULL, NULL); |
| } |
| |
| 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 < 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, new_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: { |
| QemuOpts *opts; |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| return 1; |
| } |
| } 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++]; |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| return 1; |
| } |
| |
| /* 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); |
| qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); |
| if (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) { |
| 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."); |
| |
| if (g_strcmp0(bdrv_get_format_name(blk_bs(blk)), "raw") != 0) { |
| error_report( |
| "Use the --shrink option to perform a shrink operation."); |
| ret = -1; |
| goto out; |
| } else { |
| warn_report("Using the --shrink option will suppress this message. " |
| "Note that future versions of qemu-img may refuse to " |
| "shrink images without this option."); |
| } |
| } |
| |
| ret = blk_truncate(blk, total_size, prealloc, &err); |
| if (ret < 0) { |
| error_report_err(err); |
| goto out; |
| } |
| |
| new_size = blk_getlength(blk); |
| if (new_size < 0) { |
| error_report("Failed to verify truncated image length: %s", |
| strerror(-new_size)); |
| ret = -1; |
| goto out; |
| } |
| |
| /* Some block drivers implement a truncation method, but only so |
| * the user can cause qemu to refresh the image's size from disk. |
| * The idea is that the user resizes the image outside of qemu and |
| * then invokes block_resize to inform qemu about it. |
| * (This includes iscsi and file-posix for device files.) |
| * Of course, that is not the behavior someone invoking |
| * qemu-img resize would find useful, so we catch that behavior |
| * here and tell the user. */ |
| if (new_size != total_size && new_size == current_size) { |
| error_report("Image was not resized; resizing may not be supported " |
| "for this image"); |
| ret = -1; |
| goto out; |
| } |
| |
| if (new_size != total_size) { |
| warn_report("Image should have been resized to %" PRIi64 |
| " bytes, but was resized to %" PRIi64 " bytes", |
| total_size, new_size); |
| } |
| |
| qprintf(quiet, "Image resized.\n"); |
| |
| 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 create_opts */ |
| assert(drv->create_opts); |
| |
| printf("Creation options for '%s':\n", format); |
| qemu_opts_print_help(drv->create_opts, false); |
| printf("\nNote that not all of these options may be amendable.\n"); |
| return 0; |
| } |
| |
| static int img_amend(int argc, char **argv) |
| { |
| Error *err = NULL; |
| int c, ret = 0; |
| char *options = NULL; |
| QemuOptsList *create_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; |
| |
| 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}, |
| {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 (!is_valid_option_list(optarg)) { |
| error_report("Invalid option list: %s", optarg); |
| ret = -1; |
| goto out_no_progress; |
| } |
| if (!options) { |
| options = g_strdup(optarg); |
| } else { |
| char *old_options = options; |
| options = g_strdup_printf("%s,%s", options, optarg); |
| g_free(old_options); |
| } |
| break; |
| case 'f': |
| fmt = optarg; |
| break; |
| case 't': |
| cache = optarg; |
| break; |
| case 'p': |
| progress = true; |
| break; |
| case 'q': |
| quiet = true; |
| break; |
| case OPTION_OBJECT: |
| opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!opts) { |
| ret = -1; |
| goto out_no_progress; |
| } |
| break; |
| case OPTION_IMAGE_OPTS: |
| image_opts = true; |
| break; |
| } |
| } |
| |
| if (!options) { |
| error_exit("Must specify options (-o)"); |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| ret = -1; |
| goto out_no_progress; |
| } |
| |
| 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 create_opts */ |
| assert(bs->drv->create_opts); |
| |
| create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); |
| opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); |
| qemu_opts_do_parse(opts, options, NULL, &err); |
| if (err) { |
| 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, &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(create_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:no: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 'o': |
| { |
| offset = cvtnum(optarg); |
| if (offset < 0) { |
| error_report("Invalid offset specified"); |
| return 1; |
| } |
| break; |
| } |
| break; |
| case 'q': |
| quiet = true; |
| break; |
| case 's': |
| { |
| int64_t sval; |
| |
| sval = cvtnum(optarg); |
| if (sval < 0 || sval > INT_MAX) { |
| error_report("Invalid buffer size specified"); |
| return 1; |
| } |
| |
| bufsize = sval; |
| break; |
| } |
| case 'S': |
| { |
| int64_t sval; |
| |
| sval = cvtnum(optarg); |
| if (sval < 0 || sval > INT_MAX) { |
| error_report("Invalid step size specified"); |
| 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; |
| } |
| |
| #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(arg); |
| |
| if (res <= 0 || res > INT_MAX) { |
| error_report("invalid number: '%s'", arg); |
| 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(arg); |
| |
| if (dd->count < 0) { |
| error_report("invalid number: '%s'", arg); |
| 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(arg); |
| |
| if (in->offset < 0) { |
| error_report("invalid number: '%s'", arg); |
| 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: |
| if (!qemu_opts_parse_noisily(&qemu_object_opts, optarg, true)) { |
| ret = -1; |
| goto out; |
| } |
| 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; |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| 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) |
| { |
| QString *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); |
| assert(str != NULL); |
| printf("%s\n", qstring_get_str(str)); |
| qobject_unref(obj); |
| visit_free(v); |
| qobject_unref(str); |
| } |
| |
| 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 (!is_valid_option_list(optarg)) { |
| error_report("Invalid option list: %s", optarg); |
| goto out; |
| } |
| if (!options) { |
| options = g_strdup(optarg); |
| } else { |
| char *old_options = options; |
| options = g_strdup_printf("%s,%s", options, optarg); |
| g_free(old_options); |
| } |
| 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: |
| object_opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| optarg, true); |
| if (!object_opts) { |
| goto out; |
| } |
| 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(optarg); |
| if (sval < 0) { |
| if (sval == -ERANGE) { |
| error_report("Image size must be less than 8 EiB!"); |
| } else { |
| error_report("Invalid image size specified! You may use " |
| "k, M, G, T, P or E suffixes for "); |
| error_report("kilobytes, megabytes, gigabytes, terabytes, " |
| "petabytes and exabytes."); |
| } |
| goto out; |
| } |
| img_size = (uint64_t)sval; |
| } |
| break; |
| } |
| } |
| |
| if (qemu_opts_foreach(&qemu_object_opts, |
| user_creatable_add_opts_foreach, |
| NULL, &error_fatal)) { |
| goto out; |
| } |
| |
| 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 && |
| (object_opts || image_opts || fmt || snapshot_name || sn_opts)) { |
| error_report("--object, --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) { |
| qemu_opts_do_parse(opts, options, NULL, &local_err); |
| if (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); |
| } 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" |
| #undef DEF |
| { NULL, NULL, }, |
| }; |
| |
| int main(int argc, char **argv) |
| { |
| const img_cmd_t *cmd; |
| const char *cmdname; |
| Error *local_error = NULL; |
| char *trace_file = NULL; |
| int c; |
| static const struct option long_options[] = { |
| {"help", no_argument, 0, 'h'}, |
| {"version", no_argument, 0, 'V'}, |
| {"trace", required_argument, NULL, 'T'}, |
| {0, 0, 0, 0} |
| }; |
| |
| #ifdef CONFIG_POSIX |
| signal(SIGPIPE, SIG_IGN); |
| #endif |
| |
| error_init(argv[0]); |
| module_call_init(MODULE_INIT_TRACE); |
| qemu_init_exec_dir(argv[0]); |
| |
| if (qemu_init_main_loop(&local_error)) { |
| error_report_err(local_error); |
| exit(EXIT_FAILURE); |
| } |
| |
| qcrypto_init(&error_fatal); |
| |
| module_call_init(MODULE_INIT_QOM); |
| bdrv_init(); |
| if (argc < 2) { |
| error_exit("Not enough arguments"); |
| } |
| |
| qemu_add_opts(&qemu_object_opts); |
| qemu_add_opts(&qemu_source_opts); |
| qemu_add_opts(&qemu_trace_opts); |
| |
| while ((c = getopt_long(argc, argv, "+:hVT:", long_options, NULL)) != -1) { |
| switch (c) { |
| case ':': |
| missing_argument(argv[optind - 1]); |
| return 0; |
| case '?': |
| unrecognized_option(argv[optind - 1]); |
| return 0; |
| case 'h': |
| help(); |
| return 0; |
| case 'V': |
| printf(QEMU_IMG_VERSION); |
| return 0; |
| case 'T': |
| g_free(trace_file); |
| trace_file = trace_opt_parse(optarg); |
| break; |
| } |
| } |
| |
| cmdname = argv[optind]; |
| |
| /* reset getopt_long scanning */ |
| argc -= optind; |
| if (argc < 1) { |
| return 0; |
| } |
| argv += optind; |
| qemu_reset_optind(); |
| |
| if (!trace_init_backends()) { |
| exit(1); |
| } |
| trace_init_file(trace_file); |
| qemu_set_log(LOG_TRACE); |
| |
| /* find the command */ |
| for (cmd = img_cmds; cmd->name != NULL; cmd++) { |
| if (!strcmp(cmdname, cmd->name)) { |
| return cmd->handler(argc, argv); |
| } |
| } |
| |
| /* not found */ |
| error_exit("Command not found: %s", cmdname); |
| } |