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author	Ulrich Drepper <drepper@redhat.com>	1997-08-04 14:31:26 +0000
committer	Ulrich Drepper <drepper@redhat.com>	1997-08-04 14:31:26 +0000
commit	55c14926be46b12fda4e01d0977911d3b0883db7 (patch)
tree	2bb9829379008a2d0d59bb849d12f2491624c1fb /gmon
parent	8f2ece695d8822e9ecc63ecd157e90bf17a6fe65 (diff)
download	glibc-55c14926be46b12fda4e01d0977911d3b0883db7.zip glibc-55c14926be46b12fda4e01d0977911d3b0883db7.tar.gz glibc-55c14926be46b12fda4e01d0977911d3b0883db7.tar.bz2

Update.cvs/libc-ud-970804

1997-08-04 15:29 Ulrich Drepper <drepper@cygnus.com> * locale/programs/localedef.c (main): Set bit in avail for those categories which are successfully read. * locale/programs/locfile.c (check_all_categories): Don't check categories if they are not available. (write_all_categories): Don't write categories if they are not available. * login/setutent_r.c (setutent_unknown): Change return type to int and return result of called function. * manual/arith.texi: Mark floating-point test macro from ISO C 9X as macros (not functions). * manual/libc.texinfo (UPDATED): Update. * manual/math.texi: Document exceptions, functions to handle exceptions, mathematical constants, FP comparison functions and several new functions from ISO C 9X. Change parameter of drand48, lrand48, and mrand48 to void (not empty). * manual/pattern.texi: Remove paragraph which explained that wordexp is executed by running a shell. * manual/time.texi: Explain difficulties with strftime if the functions returns 0 and no error occurred. * math/math.h: Correct comment for some M_* constants. (isgreater, isgreaterequal, isless, islessequal, islessgreater, inunordered): Rewrite to make sure the arguments are evaluated exactly once. * nis/rpcsvc/nis.x: Undo last change. * nis/rpcsvc/nis.h: Likewise. * nis/rpcsvc/nislib.h: File moved back to here. * posix/sys/types.h: Don't define socklen_t. Pretty print. * socket/sys/socket.h (bind, getsockname, connect, sendto, recvfrom, getsockopt, setsockopt, accept): Change size argument to type socklen_t. Pretty print. * manual/socket.texi: Describe socklen_t and change prototypes of socket functions to use socklen_t. * sysdeps/generic/bits/socket.h: Define socklen_t. (struct msghdr): Correct types to use socklen_t. * sysdeps/unix/sysv/linux/bits/socket.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/socket.h: Likewise. * stdio-common/printf_fp.c (__printf_fp): Correct rouding of number 1.0 < x < 8.0. * stdio-common/tfformat.c: Add new tests for above bug. * stdlib/strtod.c: Fix typo. * string/Makefile (headers): Add bits/string.h. (CFLAGS-*): Add -D__NO_STRING_INLINES. * string/string.h: Include <bits/string.h> if optimizing and __NO_STRING_INLINES is not defined. * sysdeps/stub/bits/string.h: New file. * sysdeps/powerpc/bits/fenv.h: Fix typos. * sysdeps/unix/sysv/linux/if_index.c: Let functions return ENOSYS if SIOGIFINDEX is not defined. * sysdeps/wordsize-32/inttypes.h: Pretty print. * sysdeps/wordsize-64/inttypes.h: Pretty print. * termios/cfsetspeed.c: Rewrite loop to do what it shall do. * wcsmbs/Makefile (tests): Add tst-wcstof. * wcsmbs/tst-wcstof.c: New file. 1997-08-01 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/__longjmp.c: Replace call to abort by infinite loop, to avoid dragging stdio into the dynamic linker. 1997-08-02 19:44 H.J. Lu <hjl@gnu.ai.mit.edu> * nis/nis_findserv.c (xid, xid_seed, xid_lookup): Make them u_int32_t. 1997-08-03 Andreas Jaeger <aj@arthur.rhein-neckar.de> * posix/wordexp.c (parse_tilde): Fix calls to __getpwnam_r and __getpwuid_r. Include <stdio.h> to get prototypes of *printf. (exec_comm): Remove unneeded variable *sh. * libc.map: Add wordexp, wordfree. * posix/Makefile (routines): Add wordexp. 1997-08-03 Andreas Jaeger <aj@arthur.rhein-neckar.de> * posix/wordexp.c: Correct typo in comment. (wordexp): Likewise. * manual/errno.texi (Error Codes): Fix typo. 1997-08-03 15:28 Ulrich Drepper <drepper@cygnus.com> * csu/initfini.c (SECTION): Don't put quotes around section name since this is not understood by all assemblers. Patch by Klaus Espenlaub <kespenla@hydra.informatik.uni-ulm.de>.

Diffstat (limited to 'gmon')

0 files changed, 0 insertions, 0 deletions

/* * 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 "qapi-visit.h" #include "qapi/qmp-output-visitor.h" #include "qapi/qmp/qerror.h" #include "qapi/qmp/qjson.h" #include "qemu-common.h" #include "qemu/option.h" #include "qemu/error-report.h" #include "qemu/osdep.h" #include "sysemu/sysemu.h" #include "sysemu/block-backend.h" #include "block/block_int.h" #include "block/blockjob.h" #include "block/qapi.h" #include <getopt.h> #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ ", Copyright (c) 2004-2008 Fabrice Bellard\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, }; typedef enum OutputFormat { OFORMAT_JSON, OFORMAT_HUMAN, } OutputFormat; /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ #define BDRV_O_FLAGS BDRV_O_CACHE_WB #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; error_printf("qemu-img: "); va_start(ap, fmt); error_vprintf(fmt, ap); va_end(ap); error_printf("\nTry 'qemu-img --help' for more information\n"); exit(EXIT_FAILURE); } /* Please keep in synch with qemu-img.texi */ static void QEMU_NORETURN help(void) { const char *help_msg = QEMU_IMG_VERSION "usage: qemu-img command [command options]\n" "QEMU disk image utility\n" "\n" "Command syntax:\n" #define DEF(option, callback, arg_string) \ " " arg_string "\n" #include "qemu-img-cmds.h" #undef DEF #undef GEN_DOCS "\n" "Command parameters:\n" " 'filename' is a disk image filename\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" " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" " instead\n" " '-c' indicates that target image must be compressed (qcow format only)\n" " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" " match exactly. The image doesn't need a working backing file before\n" " rebasing in this case (useful for renaming 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 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"; printf("%s\nSupported formats:", help_msg); bdrv_iterate_format(format_print, NULL); printf("\n"); exit(EXIT_SUCCESS); } 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; } 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; } create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); } qemu_opts_print_help(create_opts); qemu_opts_free(create_opts); return 0; } static BlockBackend *img_open(const char *id, const char *filename, const char *fmt, int flags, bool require_io, bool quiet) { BlockBackend *blk; BlockDriverState *bs; char password[256]; Error *local_err = NULL; QDict *options = NULL; if (fmt) { options = qdict_new(); qdict_put(options, "driver", qstring_from_str(fmt)); } blk = blk_new_open(id, filename, NULL, options, flags, &local_err); if (!blk) { error_report("Could not open '%s': %s", filename, error_get_pretty(local_err)); error_free(local_err); goto fail; } bs = blk_bs(blk); if (bdrv_is_encrypted(bs) && require_io) { qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); if (qemu_read_password(password, sizeof(password)) < 0) { error_report("No password given"); goto fail; } if (bdrv_set_key(bs, password) < 0) { error_report("invalid password"); goto fail; } } return blk; fail: blk_unref(blk); return NULL; } 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 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; for(;;) { c = getopt(argc, argv, "F:b:f:he6o:q"); if (c == -1) { break; } switch(c) { case '?': case 'h': help(); break; case 'F': base_fmt = optarg; break; case 'b': base_filename = optarg; break; case 'f': fmt = optarg; break; case 'e': error_report("option -e is deprecated, please use \'-o " "encryption\' instead!"); goto fail; case '6': error_report("option -6 is deprecated, please use \'-o " "compat6\' instead!"); goto fail; 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; } } /* Get the filename */ filename = (optind < argc) ? argv[optind] : NULL; if (options && has_help_option(options)) { g_free(options); return print_block_option_help(filename, fmt); } if (optind >= argc) { error_exit("Expecting image file name"); } optind++; /* Get image size, if specified */ if (optind < argc) { int64_t sval; char *end; sval = qemu_strtosz_suffix(argv[optind++], &end, QEMU_STRTOSZ_DEFSUFFIX_B); if (sval < 0 || *end) { 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, BDRV_O_FLAGS, &local_err, quiet); if (local_err) { error_report("%s: %s", filename, error_get_pretty(local_err)); error_free(local_err); goto fail; } g_free(options); return 0; fail: g_free(options); return 1; } static void dump_json_image_check(ImageCheck *check, bool quiet) { Error *local_err = NULL; QString *str; QmpOutputVisitor *ov = qmp_output_visitor_new(); QObject *obj; visit_type_ImageCheck(qmp_output_get_visitor(ov), &check, NULL, &local_err); obj = qmp_output_get_qobject(ov); str = qobject_to_json_pretty(obj); assert(str != NULL); qprintf(quiet, "%s\n", qstring_get_str(str)); qobject_decref(obj); qmp_output_visitor_cleanup(ov); QDECREF(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_FLAGS | BDRV_O_CHECK; ImageCheck *check; bool quiet = 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}, {0, 0, 0, 0} }; c = getopt_long(argc, argv, "hf:r:T:q", long_options, &option_index); if (c == -1) { break; } switch(c) { case '?': 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; } } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind++]; if (output && !strcmp(output, "json")) { output_format = OFORMAT_JSON; } else if (output && !strcmp(output, "human")) { output_format = OFORMAT_HUMAN; } else if (output) { error_report("--output must be used with human or json as argument."); return 1; } ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid source cache option: %s", cache); return 1; } blk = img_open("image", filename, fmt, flags, true, quiet); 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 = bdrv_get_aio_context(job->bs); do { aio_poll(aio_context, true); qemu_progress_print(job->len ? ((float)job->offset / job->len * 100.f) : 0.0f, 0); } while (!job->ready); block_job_complete_sync(job, errp); /* A block job may finish instantaneously without publishing any progress, * so just signal completion here */ 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; bool progress = false, quiet = false, drop = false; Error *local_err = NULL; CommonBlockJobCBInfo cbi; fmt = NULL; cache = BDRV_DEFAULT_CACHE; base = NULL; for(;;) { c = getopt(argc, argv, "f:ht:b:dpq"); if (c == -1) { break; } switch(c) { case '?': 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; } } /* Progress is not shown in Quiet mode */ if (quiet) { progress = false; } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind++]; flags = BDRV_O_RDWR | BDRV_O_UNMAP; ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid cache option: %s", cache); return 1; } blk = img_open("image", filename, fmt, flags, true, quiet); 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, QERR_BASE_NOT_FOUND, base); 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, }; commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, common_block_job_cb, &cbi, &local_err); 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); } run_block_job(bs->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 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. */ static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) { bool is_zero; int i; 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; } } *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) { int ret; int num_checked, num_used; if (n < min) { min = n; } ret = is_allocated_sectors(buf, n, pnum); if (!ret) { return ret; } num_used = *pnum; buf += BDRV_SECTOR_SIZE * *pnum; n -= *pnum; num_checked = num_used; while (n > 0) { ret = is_allocated_sectors(buf, n, pnum); buf += BDRV_SECTOR_SIZE * *pnum; n -= *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 both * buffers matches, non-zero otherwise. * * pnum is set to the number of sectors (including and immediately following * the first one) that are known to have the same comparison result */ static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, int *pnum) { bool res; int i; if (n <= 0) { *pnum = 0; return 0; } res = !!memcmp(buf1, buf2, 512); for(i = 1; i < n; i++) { buf1 += 512; buf2 += 512; if (!!memcmp(buf1, buf2, 512) != res) { break; } } *pnum = i; return res; } #define IO_BUF_SIZE (2 * 1024 * 1024) static int64_t sectors_to_bytes(int64_t sectors) { return sectors << BDRV_SECTOR_BITS; } static int64_t sectors_to_process(int64_t total, int64_t from) { return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); } /* * Check if passed sectors are empty (not allocated or contain only 0 bytes) * * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero * data and negative value on error. * * @param blk: BlockBackend for the image * @param sect_num: Number of first sector to check * @param sect_count: Number of sectors 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 sect_num, int sect_count, const char *filename, uint8_t *buffer, bool quiet) { int pnum, ret = 0; ret = blk_read(blk, sect_num, buffer, sect_count); if (ret < 0) { error_report("Error while reading offset %" PRId64 " of %s: %s", sectors_to_bytes(sect_num), filename, strerror(-ret)); return ret; } ret = is_allocated_sectors(buffer, sect_count, &pnum); if (ret || pnum != sect_count) { qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 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_sectors1, total_sectors2; uint8_t *buf1 = NULL, *buf2 = NULL; int 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; int64_t total_sectors; int64_t sector_num = 0; int64_t nb_sectors; int c, pnum; uint64_t progress_base; cache = BDRV_DEFAULT_CACHE; for (;;) { c = getopt(argc, argv, "hf:F:T:pqs"); if (c == -1) { break; } switch (c) { case '?': 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; } } /* Progress is not shown in Quiet mode */ if (quiet) { progress = false; } if (optind != argc - 2) { error_exit("Expecting two image file names"); } filename1 = argv[optind++]; filename2 = argv[optind++]; /* Initialize before goto out */ qemu_progress_init(progress, 2.0); flags = BDRV_O_FLAGS; ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid source cache option: %s", cache); ret = 2; goto out3; } blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); if (!blk1) { ret = 2; goto out3; } bs1 = blk_bs(blk1); blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); if (!blk2) { ret = 2; goto out2; } bs2 = blk_bs(blk2); buf1 = blk_blockalign(blk1, IO_BUF_SIZE); buf2 = blk_blockalign(blk2, IO_BUF_SIZE); total_sectors1 = blk_nb_sectors(blk1); if (total_sectors1 < 0) { error_report("Can't get size of %s: %s", filename1, strerror(-total_sectors1)); ret = 4; goto out; } total_sectors2 = blk_nb_sectors(blk2); if (total_sectors2 < 0) { error_report("Can't get size of %s: %s", filename2, strerror(-total_sectors2)); ret = 4; goto out; } total_sectors = MIN(total_sectors1, total_sectors2); progress_base = MAX(total_sectors1, total_sectors2); qemu_progress_print(0, 100); if (strict && total_sectors1 != total_sectors2) { ret = 1; qprintf(quiet, "Strict mode: Image size mismatch!\n"); goto out; } for (;;) { nb_sectors = sectors_to_process(total_sectors, sector_num); if (nb_sectors <= 0) { break; } allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, &pnum1); if (allocated1 < 0) { ret = 3; error_report("Sector allocation test failed for %s", filename1); goto out; } allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, &pnum2); if (allocated2 < 0) { ret = 3; error_report("Sector allocation test failed for %s", filename2); goto out; } nb_sectors = MIN(pnum1, pnum2); if (allocated1 == allocated2) { if (allocated1) { ret = blk_read(blk1, sector_num, buf1, nb_sectors); if (ret < 0) { error_report("Error while reading offset %" PRId64 " of %s:" " %s", sectors_to_bytes(sector_num), filename1, strerror(-ret)); ret = 4; goto out; } ret = blk_read(blk2, sector_num, buf2, nb_sectors); if (ret < 0) { error_report("Error while reading offset %" PRId64 " of %s: %s", sectors_to_bytes(sector_num), filename2, strerror(-ret)); ret = 4; goto out; } ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); if (ret || pnum != nb_sectors) { qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", sectors_to_bytes( ret ? sector_num : sector_num + pnum)); ret = 1; goto out; } } } else { if (strict) { ret = 1; qprintf(quiet, "Strict mode: Offset %" PRId64 " allocation mismatch!\n", sectors_to_bytes(sector_num)); goto out; } if (allocated1) { ret = check_empty_sectors(blk1, sector_num, nb_sectors, filename1, buf1, quiet); } else { ret = check_empty_sectors(blk2, sector_num, nb_sectors, filename2, buf1, quiet); } if (ret) { if (ret < 0) { error_report("Error while reading offset %" PRId64 ": %s", sectors_to_bytes(sector_num), strerror(-ret)); ret = 4; } goto out; } } sector_num += nb_sectors; qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); } if (total_sectors1 != total_sectors2) { BlockBackend *blk_over; int64_t total_sectors_over; const char *filename_over; qprintf(quiet, "Warning: Image size mismatch!\n"); if (total_sectors1 > total_sectors2) { total_sectors_over = total_sectors1; blk_over = blk1; filename_over = filename1; } else { total_sectors_over = total_sectors2; blk_over = blk2; filename_over = filename2; } for (;;) { nb_sectors = sectors_to_process(total_sectors_over, sector_num); if (nb_sectors <= 0) { break; } ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, nb_sectors, &pnum); if (ret < 0) { ret = 3; error_report("Sector allocation test failed for %s", filename_over); goto out; } nb_sectors = pnum; if (ret) { ret = check_empty_sectors(blk_over, sector_num, nb_sectors, filename_over, buf1, quiet); if (ret) { if (ret < 0) { error_report("Error while reading offset %" PRId64 " of %s: %s", sectors_to_bytes(sector_num), filename_over, strerror(-ret)); ret = 4; } goto out; } } sector_num += nb_sectors; qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); } } qprintf(quiet, "Images are identical.\n"); ret = 0; out: qemu_vfree(buf1); qemu_vfree(buf2); blk_unref(blk2); out2: blk_unref(blk1); out3: qemu_progress_end(); return ret; } enum ImgConvertBlockStatus { BLK_DATA, BLK_ZERO, BLK_BACKING_FILE, }; typedef struct ImgConvertState { BlockBackend **src; int64_t *src_sectors; int src_cur, src_num; int64_t src_cur_offset; int64_t total_sectors; int64_t allocated_sectors; enum ImgConvertBlockStatus status; int64_t sector_next_status; BlockBackend *target; bool has_zero_init; bool compressed; bool target_has_backing; int min_sparse; size_t cluster_sectors; size_t buf_sectors; } ImgConvertState; static void convert_select_part(ImgConvertState *s, int64_t sector_num) { assert(sector_num >= s->src_cur_offset); while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { s->src_cur_offset += s->src_sectors[s->src_cur]; s->src_cur++; assert(s->src_cur < s->src_num); } } static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) { int64_t ret; int n; convert_select_part(s, sector_num); assert(s->total_sectors > sector_num); n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); if (s->sector_next_status <= sector_num) { ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), sector_num - s->src_cur_offset, n, &n); if (ret < 0) { return ret; } if (ret & BDRV_BLOCK_ZERO) { s->status = BLK_ZERO; } else if (ret & BDRV_BLOCK_DATA) { s->status = BLK_DATA; } else if (!s->target_has_backing) { /* Without a target backing file we must copy over the contents of * the backing file as well. */ /* TODO Check block status of the backing file chain to avoid * needlessly reading zeroes and limiting the iteration to the * buffer size */ s->status = BLK_DATA; } else { s->status = BLK_BACKING_FILE; } 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 convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, uint8_t *buf) { int n; int ret; if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { return 0; } assert(nb_sectors <= s->buf_sectors); while (nb_sectors > 0) { BlockBackend *blk; int64_t bs_sectors; /* 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); blk = s->src[s->src_cur]; bs_sectors = s->src_sectors[s->src_cur]; n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); if (ret < 0) { return ret; } sector_num += n; nb_sectors -= n; buf += n * BDRV_SECTOR_SIZE; } return 0; } static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, const uint8_t *buf) { int ret; while (nb_sectors > 0) { int n = nb_sectors; switch (s->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: /* We must always write compressed clusters as a whole, so don't * try to find zeroed parts in the buffer. We can only save the * write if the buffer is completely zeroed and we're allowed to * keep the target sparse. */ if (s->compressed) { if (s->has_zero_init && s->min_sparse && buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) { assert(!s->target_has_backing); break; } ret = blk_write_compressed(s->target, sector_num, buf, n); if (ret < 0) { return ret; } break; } /* If there is real non-zero data or we're told to keep the target * fully allocated (-S 0), we must write it. Otherwise we can treat * it as zero sectors. */ if (!s->min_sparse || is_allocated_sectors_min(buf, n, &n, s->min_sparse)) { ret = blk_write(s->target, sector_num, buf, n); if (ret < 0) { return ret; } break; } /* fall-through */ case BLK_ZERO: if (s->has_zero_init) { break; } ret = blk_write_zeroes(s->target, sector_num, n, 0); if (ret < 0) { return ret; } break; } sector_num += n; nb_sectors -= n; buf += n * BDRV_SECTOR_SIZE; } return 0; } static int convert_do_copy(ImgConvertState *s) { uint8_t *buf = NULL; int64_t sector_num, allocated_done; int ret; int n; /* 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 = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 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"); ret = -EINVAL; goto fail; } s->buf_sectors = s->cluster_sectors; } buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); /* Calculate allocated sectors for progress */ s->allocated_sectors = 0; sector_num = 0; while (sector_num < s->total_sectors) { n = convert_iteration_sectors(s, sector_num); if (n < 0) { ret = n; goto fail; } if (s->status == BLK_DATA) { s->allocated_sectors += n; } sector_num += n; } /* Do the copy */ s->src_cur = 0; s->src_cur_offset = 0; s->sector_next_status = 0; sector_num = 0; allocated_done = 0; while (sector_num < s->total_sectors) { n = convert_iteration_sectors(s, sector_num); if (n < 0) { ret = n; goto fail; } if (s->status == BLK_DATA) { allocated_done += n; qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 0); } ret = convert_read(s, sector_num, n, buf); if (ret < 0) { error_report("error while reading sector %" PRId64 ": %s", sector_num, strerror(-ret)); goto fail; } ret = convert_write(s, sector_num, n, buf); if (ret < 0) { error_report("error while writing sector %" PRId64 ": %s", sector_num, strerror(-ret)); goto fail; } sector_num += n; } if (s->compressed) { /* signal EOF to align */ ret = blk_write_compressed(s->target, 0, NULL, 0); if (ret < 0) { goto fail; } } ret = 0; fail: qemu_vfree(buf); return ret; } static int img_convert(int argc, char **argv) { int c, bs_n, bs_i, compress, cluster_sectors, skip_create; int64_t ret = 0; int progress = 0, flags, src_flags; const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; BlockDriver *drv, *proto_drv; BlockBackend **blk = NULL, *out_blk = NULL; BlockDriverState **bs = NULL, *out_bs = NULL; int64_t total_sectors; int64_t *bs_sectors = NULL; size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; BlockDriverInfo bdi; QemuOpts *opts = NULL; QemuOptsList *create_opts = NULL; const char *out_baseimg_param; char *options = NULL; const char *snapshot_name = NULL; int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ bool quiet = false; Error *local_err = NULL; QemuOpts *sn_opts = NULL; ImgConvertState state; fmt = NULL; out_fmt = "raw"; cache = "unsafe"; src_cache = BDRV_DEFAULT_CACHE; out_baseimg = NULL; compress = 0; skip_create = 0; for(;;) { c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); if (c == -1) { break; } switch(c) { case '?': case 'h': help(); break; case 'f': fmt = optarg; break; case 'O': out_fmt = optarg; break; case 'B': out_baseimg = optarg; break; case 'c': compress = 1; break; case 'e': error_report("option -e is deprecated, please use \'-o " "encryption\' instead!"); ret = -1; goto fail_getopt; case '6': error_report("option -6 is deprecated, please use \'-o " "compat6\' instead!"); ret = -1; goto fail_getopt; case 'o': if (!is_valid_option_list(optarg)) { error_report("Invalid option list: %s", optarg); ret = -1; 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 's': snapshot_name = optarg; 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); ret = -1; goto fail_getopt; } } else { snapshot_name = optarg; } break; case 'S': { int64_t sval; char *end; sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); if (sval < 0 || *end) { error_report("Invalid minimum zero buffer size for sparse output specified"); ret = -1; goto fail_getopt; } min_sparse = sval / BDRV_SECTOR_SIZE; break; } case 'p': progress = 1; break; case 't': cache = optarg; break; case 'T': src_cache = optarg; break; case 'q': quiet = true; break; case 'n': skip_create = 1; break; } } /* Initialize before goto out */ if (quiet) { progress = 0; } qemu_progress_init(progress, 1.0); bs_n = argc - optind - 1; out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; if (options && has_help_option(options)) { ret = print_block_option_help(out_filename, out_fmt); goto out; } if (bs_n < 1) { error_exit("Must specify image file name"); } if (bs_n > 1 && out_baseimg) { error_report("-B makes no sense when concatenating multiple input " "images"); ret = -1; goto out; } src_flags = BDRV_O_FLAGS; ret = bdrv_parse_cache_flags(src_cache, &src_flags); if (ret < 0) { error_report("Invalid source cache option: %s", src_cache); goto out; } qemu_progress_print(0, 100); blk = g_new0(BlockBackend *, bs_n); bs = g_new0(BlockDriverState *, bs_n); bs_sectors = g_new(int64_t, bs_n); total_sectors = 0; for (bs_i = 0; bs_i < bs_n; bs_i++) { char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) : g_strdup("source"); blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, true, quiet); g_free(id); if (!blk[bs_i]) { ret = -1; goto out; } bs[bs_i] = blk_bs(blk[bs_i]); bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); if (bs_sectors[bs_i] < 0) { error_report("Could not get size of %s: %s", argv[optind + bs_i], strerror(-bs_sectors[bs_i])); ret = -1; goto out; } total_sectors += bs_sectors[bs_i]; } if (sn_opts) { ret = bdrv_snapshot_load_tmp(bs[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 (bs_n > 1) { error_report("No support for concatenating multiple snapshot"); ret = -1; goto out; } bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); } if (local_err) { error_report("Failed to load snapshot: %s", error_get_pretty(local_err)); error_free(local_err); ret = -1; goto out; } /* 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 (!skip_create) { 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, 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; } /* Check if compression is supported */ if (compress) { bool encryption = qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); const char *preallocation = qemu_opt_get(opts, BLOCK_OPT_PREALLOC); if (!drv->bdrv_write_compressed) { error_report("Compression not supported for this file format"); ret = -1; goto out; } if (encryption) { 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; } } if (!skip_create) { /* Create the new image */ ret = bdrv_create(drv, out_filename, opts, &local_err); if (ret < 0) { error_report("%s: error while converting %s: %s", out_filename, out_fmt, error_get_pretty(local_err)); error_free(local_err); goto out; } } flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid cache option: %s", cache); goto out; } out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); if (!out_blk) { ret = -1; goto out; } out_bs = blk_bs(out_blk); /* increase bufsectors from the default 4096 (2M) if opt_transfer_length * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) * as maximum. */ bufsectors = MIN(32768, MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, out_bs->bl.discard_alignment)) ); if (skip_create) { int64_t output_sectors = blk_nb_sectors(out_blk); if (output_sectors < 0) { error_report("unable to get output image length: %s", strerror(-output_sectors)); ret = -1; goto out; } else if (output_sectors < total_sectors) { error_report("output file is smaller than input file"); ret = -1; goto out; } } cluster_sectors = 0; ret = bdrv_get_info(out_bs, &bdi); if (ret < 0) { if (compress) { error_report("could not get block driver info"); goto out; } } else { compress = compress || bdi.needs_compressed_writes; cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; } state = (ImgConvertState) { .src = blk, .src_sectors = bs_sectors, .src_num = bs_n, .total_sectors = total_sectors, .target = out_blk, .compressed = compress, .target_has_backing = (bool) out_baseimg, .min_sparse = min_sparse, .cluster_sectors = cluster_sectors, .buf_sectors = bufsectors, }; ret = convert_do_copy(&state); 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); blk_unref(out_blk); g_free(bs); if (blk) { for (bs_i = 0; bs_i < bs_n; bs_i++) { blk_unref(blk[bs_i]); } g_free(blk); } g_free(bs_sectors); fail_getopt: g_free(options); if (ret) { return 1; } return 0; } 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) { Error *local_err = NULL; QString *str; QmpOutputVisitor *ov = qmp_output_visitor_new(); QObject *obj; visit_type_ImageInfoList(qmp_output_get_visitor(ov), &list, NULL, &local_err); obj = qmp_output_get_qobject(ov); str = qobject_to_json_pretty(obj); assert(str != NULL); printf("%s\n", qstring_get_str(str)); qobject_decref(obj); qmp_output_visitor_cleanup(ov); QDECREF(str); } static void dump_json_image_info(ImageInfo *info) { Error *local_err = NULL; QString *str; QmpOutputVisitor *ov = qmp_output_visitor_new(); QObject *obj; visit_type_ImageInfo(qmp_output_get_visitor(ov), &info, NULL, &local_err); obj = qmp_output_get_qobject(ov); str = qobject_to_json_pretty(obj); assert(str != NULL); printf("%s\n", qstring_get_str(str)); qobject_decref(obj); qmp_output_visitor_cleanup(ov); QDECREF(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(const char *filename, const char *fmt, bool chain) { 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", filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 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) { filename = info->backing_filename; } 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; 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}, {0, 0, 0, 0} }; c = getopt_long(argc, argv, "f:h", long_options, &option_index); if (c == -1) { break; } switch(c) { case '?': case 'h': help(); break; case 'f': fmt = optarg; break; case OPTION_OUTPUT: output = optarg; break; case OPTION_BACKING_CHAIN: chain = true; break; } } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind++]; if (output && !strcmp(output, "json")) { output_format = OFORMAT_JSON; } else if (output && !strcmp(output, "human")) { output_format = OFORMAT_HUMAN; } else if (output) { error_report("--output must be used with human or json as argument."); return 1; } list = collect_image_info_list(filename, fmt, chain); 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; } typedef struct MapEntry { int flags; int depth; int64_t start; int64_t length; int64_t offset; BlockDriverState *bs; } MapEntry; static void dump_map_entry(OutputFormat output_format, MapEntry *e, MapEntry *next) { switch (output_format) { case OFORMAT_HUMAN: if ((e->flags & BDRV_BLOCK_DATA) && !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { error_report("File contains external, encrypted or compressed clusters."); exit(1); } if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", e->start, e->length, e->offset, e->bs->filename); } /* This format ignores the distinction between 0, ZERO and ZERO|DATA. * Modify the flags here to allow more coalescing. */ if (next && (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { next->flags &= ~BDRV_BLOCK_DATA; next->flags |= BDRV_BLOCK_ZERO; } break; case OFORMAT_JSON: printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," " \"zero\": %s, \"data\": %s", (e->start == 0 ? "[" : ",\n"), e->start, e->length, e->depth, (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); if (e->flags & BDRV_BLOCK_OFFSET_VALID) { printf(", \"offset\": %"PRId64"", e->offset); } putchar('}'); if (!next) { printf("]\n"); } break; } } static int get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors, MapEntry *e) { int64_t ret; int depth; /* 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_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); if (ret < 0) { return ret; } assert(nb_sectors); if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { break; } bs = backing_bs(bs); if (bs == NULL) { ret = 0; break; } depth++; } e->start = sector_num * BDRV_SECTOR_SIZE; e->length = nb_sectors * BDRV_SECTOR_SIZE; e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; e->offset = ret & BDRV_BLOCK_OFFSET_MASK; e->depth = depth; e->bs = bs; return 0; } 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; 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}, {0, 0, 0, 0} }; c = getopt_long(argc, argv, "f:h", long_options, &option_index); if (c == -1) { break; } switch (c) { case '?': case 'h': help(); break; case 'f': fmt = optarg; break; case OPTION_OUTPUT: output = optarg; break; } } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind]; if (output && !strcmp(output, "json")) { output_format = OFORMAT_JSON; } else if (output && !strcmp(output, "human")) { output_format = OFORMAT_HUMAN; } else if (output) { error_report("--output must be used with human or json as argument."); return 1; } blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 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 nsectors_left; int64_t sector_num; int n; sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; /* Probe up to 1 GiB at a time. */ nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); ret = get_block_status(bs, sector_num, n, &next); if (ret < 0) { error_report("Could not read file metadata: %s", strerror(-ret)); goto out; } if (curr.length != 0 && curr.flags == next.flags && curr.depth == next.depth && ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || curr.offset + curr.length == next.offset)) { curr.length += next.length; continue; } if (curr.length > 0) { dump_map_entry(output_format, &curr, &next); } curr = next; } 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; bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; /* Parse commandline parameters */ for(;;) { c = getopt(argc, argv, "la:c:d:hq"); if (c == -1) { break; } switch(c) { case '?': 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; } } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind++]; /* Open the image */ blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 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); if (ret) { error_report("Could not apply snapshot '%s': %d (%s)", snapshot_name, ret, strerror(-ret)); } break; case SNAPSHOT_DELETE: bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); if (err) { error_report("Could not delete snapshot '%s': (%s)", snapshot_name, error_get_pretty(err)); error_free(err); 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; BlockDriverState *bs = NULL; char *filename; const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; int c, flags, src_flags, ret; int unsafe = 0; int progress = 0; bool quiet = false; Error *local_err = NULL; /* Parse commandline parameters */ fmt = NULL; cache = BDRV_DEFAULT_CACHE; src_cache = BDRV_DEFAULT_CACHE; out_baseimg = NULL; out_basefmt = NULL; for(;;) { c = getopt(argc, argv, "hf:F:b:upt:T:q"); if (c == -1) { break; } switch(c) { case '?': 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; } } if (quiet) { progress = 0; } if (optind != argc - 1) { error_exit("Expecting one image file name"); } if (!unsafe && !out_baseimg) { error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); } filename = argv[optind++]; qemu_progress_init(progress, 2.0); qemu_progress_print(0, 100); flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid cache option: %s", cache); goto out; } src_flags = BDRV_O_FLAGS; ret = bdrv_parse_cache_flags(src_cache, &src_flags); if (ret < 0) { error_report("Invalid source cache option: %s", src_cache); goto out; } /* * 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", filename, fmt, flags, true, quiet); 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(options, "driver", qstring_from_str(bs->backing_format)); } bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); blk_old_backing = blk_new_open("old_backing", backing_name, NULL, options, src_flags, &local_err); if (!blk_old_backing) { error_report("Could not open old backing file '%s': %s", backing_name, error_get_pretty(local_err)); error_free(local_err); goto out; } if (out_baseimg[0]) { if (out_basefmt) { options = qdict_new(); qdict_put(options, "driver", qstring_from_str(out_basefmt)); } else { options = NULL; } blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, options, src_flags, &local_err); if (!blk_new_backing) { error_report("Could not open new backing file '%s': %s", out_baseimg, error_get_pretty(local_err)); error_free(local_err); 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 num_sectors; int64_t old_backing_num_sectors; int64_t new_backing_num_sectors = 0; uint64_t sector; int n; uint8_t * buf_old; uint8_t * buf_new; float local_progress = 0; buf_old = blk_blockalign(blk, IO_BUF_SIZE); buf_new = blk_blockalign(blk, IO_BUF_SIZE); num_sectors = blk_nb_sectors(blk); if (num_sectors < 0) { error_report("Could not get size of '%s': %s", filename, strerror(-num_sectors)); ret = -1; goto out; } old_backing_num_sectors = blk_nb_sectors(blk_old_backing); if (old_backing_num_sectors < 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_num_sectors)); ret = -1; goto out; } if (blk_new_backing) { new_backing_num_sectors = blk_nb_sectors(blk_new_backing); if (new_backing_num_sectors < 0) { error_report("Could not get size of '%s': %s", out_baseimg, strerror(-new_backing_num_sectors)); ret = -1; goto out; } } if (num_sectors != 0) { local_progress = (float)100 / (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); } for (sector = 0; sector < num_sectors; sector += n) { /* How many sectors can we handle with the next read? */ if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { n = (IO_BUF_SIZE / 512); } else { n = num_sectors - sector; } /* If the cluster is allocated, we don't need to take action */ ret = bdrv_is_allocated(bs, sector, 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 (sector >= old_backing_num_sectors) { memset(buf_old, 0, n * BDRV_SECTOR_SIZE); } else { if (sector + n > old_backing_num_sectors) { n = old_backing_num_sectors - sector; } ret = blk_read(blk_old_backing, sector, buf_old, n); if (ret < 0) { error_report("error while reading from old backing file"); goto out; } } if (sector >= new_backing_num_sectors || !blk_new_backing) { memset(buf_new, 0, n * BDRV_SECTOR_SIZE); } else { if (sector + n > new_backing_num_sectors) { n = new_backing_num_sectors - sector; } ret = blk_read(blk_new_backing, sector, 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) { int pnum; if (compare_sectors(buf_old + written * 512, buf_new + written * 512, n - written, &pnum)) { ret = blk_write(blk, sector + written, buf_old + written * 512, pnum); if (ret < 0) { error_report("Error while writing to COW image: %s", strerror(-ret)); goto out; } } written += pnum; } qemu_progress_print(local_progress, 100); } qemu_vfree(buf_old); qemu_vfree(buf_new); } /* * 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); } 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; bool quiet = false; BlockBackend *blk = NULL; 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 */ } }, }; /* 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(;;) { c = getopt(argc, argv, "f:hq"); if (c == -1) { break; } switch(c) { case '?': case 'h': help(); break; case 'f': fmt = optarg; break; case 'q': quiet = true; break; } } if (optind != argc - 1) { error_exit("Expecting one image file name"); } filename = argv[optind++]; /* Choose grow, shrink, or absolute resize mode */ switch (size[0]) { case '+': relative = 1; size++; break; case '-': relative = -1; size++; break; default: relative = 0; break; } /* Parse size */ param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 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", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet); if (!blk) { ret = -1; goto out; } if (relative) { total_size = blk_getlength(blk) + n * relative; } else { total_size = n; } if (total_size <= 0) { error_report("New image size must be positive"); ret = -1; goto out; } ret = blk_truncate(blk, total_size); switch (ret) { case 0: qprintf(quiet, "Image resized.\n"); break; case -ENOTSUP: error_report("This image does not support resize"); break; case -EACCES: error_report("Image is read-only"); break; default: error_report("Error resizing image (%d)", -ret); break; } 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) { qemu_progress_print(100.f * offset / total_work_size, 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 quiet = false, progress = false; BlockBackend *blk = NULL; BlockDriverState *bs = NULL; cache = BDRV_DEFAULT_CACHE; for (;;) { c = getopt(argc, argv, "ho:f:t:pq"); if (c == -1) { break; } switch (c) { case 'h': case '?': 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; } } if (!options) { error_exit("Must specify options (-o)"); } if (quiet) { progress = false; } qemu_progress_init(progress, 1.0); filename = (optind == argc - 1) ? argv[argc - 1] : NULL; if (fmt && has_help_option(options)) { /* If a format is explicitly specified (and possibly no filename is * given), print option help here */ ret = print_block_option_help(filename, fmt); goto out; } if (optind != argc - 1) { error_report("Expecting one image file name"); ret = -1; goto out; } flags = BDRV_O_FLAGS | BDRV_O_RDWR; ret = bdrv_parse_cache_flags(cache, &flags); if (ret < 0) { error_report("Invalid cache option: %s", cache); goto out; } blk = img_open("image", filename, fmt, flags, true, quiet); 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_block_option_help(filename, fmt); goto out; } if (!bs->drv->create_opts) { error_report("Format driver '%s' does not support any options to amend", fmt); ret = -1; goto out; } create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); if (options) { 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); qemu_progress_print(100.f, 0); if (ret < 0) { error_report("Error while amending options: %s", strerror(-ret)); 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; } static const img_cmd_t img_cmds[] = { #define DEF(option, callback, arg_string) \ { option, callback }, #include "qemu-img-cmds.h" #undef DEF #undef GEN_DOCS { NULL, NULL, }, }; int main(int argc, char **argv) { const img_cmd_t *cmd; const char *cmdname; Error *local_error = NULL; int c; static const struct option long_options[] = { {"help", no_argument, 0, 'h'}, {"version", no_argument, 0, 'v'}, {0, 0, 0, 0} }; #ifdef CONFIG_POSIX signal(SIGPIPE, SIG_IGN); #endif error_set_progname(argv[0]); qemu_init_exec_dir(argv[0]); if (qemu_init_main_loop(&local_error)) { error_report_err(local_error); exit(EXIT_FAILURE); } bdrv_init(); if (argc < 2) { error_exit("Not enough arguments"); } cmdname = argv[1]; /* find the command */ for (cmd = img_cmds; cmd->name != NULL; cmd++) { if (!strcmp(cmdname, cmd->name)) { return cmd->handler(argc - 1, argv + 1); } } c = getopt_long(argc, argv, "h", long_options, NULL); if (c == 'h') { help(); } if (c == 'v') { printf(QEMU_IMG_VERSION); return 0; } /* not found */ error_exit("Command not found: %s", cmdname); }


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