static int img_create(int argc, char **argv) { int c, ret, flags; const char *fmt = "raw"; const char *base_fmt = NULL; const char *filename; const char *base_filename = NULL; BlockDriver *drv; QEMUOptionParameter *param = NULL; char *options = NULL; flags = 0; for(;;) { c = getopt(argc, argv, "F:b:f:he6o:"); if (c == -1) break; switch(c) { case 'h': help(); break; case 'F': base_fmt = optarg; break; case 'b': base_filename = optarg; break; case 'f': fmt = optarg; break; case 'e': flags |= BLOCK_FLAG_ENCRYPT; break; case '6': flags |= BLOCK_FLAG_COMPAT6; break; case 'o': options = optarg; break; } } /* Find driver and parse its options */ drv = bdrv_find_format(fmt); if (!drv) error("Unknown file format '%s'", fmt); if (options && !strcmp(options, "?")) { print_option_help(drv->create_options); return 0; } if (options) { param = parse_option_parameters(options, drv->create_options, param); if (param == NULL) { error("Invalid options for file format '%s'.", fmt); } } else { param = parse_option_parameters("", drv->create_options, param); } /* Get the filename */ if (optind >= argc) help(); filename = argv[optind++]; /* Add size to parameters */ if (optind < argc) { set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); } /* Add old-style options to parameters */ add_old_style_options(fmt, param, flags, base_filename, base_fmt); // The size for the image must always be specified, with one exception: // If we are using a backing file, we can obtain the size from there if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) { QEMUOptionParameter *backing_file = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); QEMUOptionParameter *backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT); if (backing_file && backing_file->value.s) { BlockDriverState *bs; uint64_t size; const char *fmt = NULL; char buf[32]; if (backing_fmt && backing_fmt->value.s) { if (bdrv_find_format(backing_fmt->value.s)) { fmt = backing_fmt->value.s; } else { error("Unknown backing file format '%s'", backing_fmt->value.s); } } bs = bdrv_new_open(backing_file->value.s, fmt); bdrv_get_geometry(bs, &size); size *= 512; bdrv_delete(bs); snprintf(buf, sizeof(buf), "%" PRId64, size); set_option_parameter(param, BLOCK_OPT_SIZE, buf); } else { error("Image creation needs a size parameter"); } } printf("Formatting '%s', fmt=%s ", filename, fmt); print_option_parameters(param); puts(""); ret = bdrv_create(drv, filename, param); free_option_parameters(param); if (ret < 0) { if (ret == -ENOTSUP) { error("Formatting or formatting option not supported for file format '%s'", fmt); } else if (ret == -EFBIG) { error("The image size is too large for file format '%s'", fmt); } else { error("Error while formatting"); } } return 0; }