/* * Command line utility to exercise the QEMU I/O path. * * Copyright (C) 2009 Red Hat, Inc. * Copyright (c) 2003-2005 Silicon Graphics, Inc. * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include <getopt.h> #include <libgen.h> #include "qapi/error.h" #include "qemu-io.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" #include "qemu/option.h" #include "qemu/config-file.h" #include "qemu/readline.h" #include "qapi/qmp/qstring.h" #include "qom/object_interfaces.h" #include "sysemu/block-backend.h" #include "block/block_int.h" #include "trace/control.h" #define CMD_NOFILE_OK 0x01 static char *progname; static BlockBackend *qemuio_blk; /* qemu-io commands passed using -c */ static int ncmdline; static char **cmdline; static bool imageOpts; static ReadLineState *readline_state; static int close_f(BlockBackend *blk, int argc, char **argv) { blk_unref(qemuio_blk); qemuio_blk = NULL; return 0; } static const cmdinfo_t close_cmd = { .name = "close", .altname = "c", .cfunc = close_f, .oneline = "close the current open file", }; static int openfile(char *name, int flags, bool writethrough, QDict *opts) { Error *local_err = NULL; BlockDriverState *bs; if (qemuio_blk) { error_report("file open already, try 'help close'"); QDECREF(opts); return 1; } qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err); if (!qemuio_blk) { error_reportf_err(local_err, "can't open%s%s: ", name ? " device " : "", name ?: ""); return 1; } bs = blk_bs(qemuio_blk); if (bdrv_is_encrypted(bs) && bdrv_key_required(bs)) { char password[256]; printf("Disk image '%s' is encrypted.\n", name); if (qemu_read_password(password, sizeof(password)) < 0) { error_report("No password given"); goto error; } if (bdrv_set_key(bs, password) < 0) { error_report("invalid password"); goto error; } } blk_set_enable_write_cache(qemuio_blk, !writethrough); return 0; error: blk_unref(qemuio_blk); qemuio_blk = NULL; return 1; } static void open_help(void) { printf( "\n" " opens a new file in the requested mode\n" "\n" " Example:\n" " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n" "\n" " Opens a file for subsequent use by all of the other qemu-io commands.\n" " -r, -- open file read-only\n" " -s, -- use snapshot file\n" " -n, -- disable host cache\n" " -o, -- options to be given to the block driver" "\n"); } static int open_f(BlockBackend *blk, int argc, char **argv); static const cmdinfo_t open_cmd = { .name = "open", .altname = "o", .cfunc = open_f, .argmin = 1, .argmax = -1, .flags = CMD_NOFILE_OK, .args = "[-Crsn] [-o options] [path]", .oneline = "open the file specified by path", .help = open_help, }; static QemuOptsList empty_opts = { .name = "drive", .merge_lists = true, .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head), .desc = { /* no elements => accept any params */ { /* end of list */ } }, }; static int open_f(BlockBackend *blk, int argc, char **argv) { int flags = 0; int readonly = 0; bool writethrough = true; int c; QemuOpts *qopts; QDict *opts; while ((c = getopt(argc, argv, "snrgo:")) != -1) { switch (c) { case 's': flags |= BDRV_O_SNAPSHOT; break; case 'n': flags |= BDRV_O_NOCACHE; writethrough = false; break; case 'r': readonly = 1; break; case 'o': if (imageOpts) { printf("--image-opts and 'open -o' are mutually exclusive\n"); return 0; } if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) { qemu_opts_reset(&empty_opts); return 0; } break; default: qemu_opts_reset(&empty_opts); return qemuio_command_usage(&open_cmd); } } if (!readonly) { flags |= BDRV_O_RDWR; } if (imageOpts && (optind == argc - 1)) { if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) { qemu_opts_reset(&empty_opts); return 0; } optind++; } qopts = qemu_opts_find(&empty_opts, NULL); opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL; qemu_opts_reset(&empty_opts); if (optind == argc - 1) { return openfile(argv[optind], flags, writethrough, opts); } else if (optind == argc) { return openfile(NULL, flags, writethrough, opts); } else { QDECREF(opts); return qemuio_command_usage(&open_cmd); } } static int quit_f(BlockBackend *blk, int argc, char **argv) { return 1; } static const cmdinfo_t quit_cmd = { .name = "quit", .altname = "q", .cfunc = quit_f, .argmin = -1, .argmax = -1, .flags = CMD_FLAG_GLOBAL, .oneline = "exit the program", }; static void usage(const char *name) { printf( "Usage: %s [-h] [-V] [-rsnm] [-f FMT] [-c STRING] ... [file]\n" "QEMU Disk exerciser\n" "\n" " --object OBJECTDEF define an object such as 'secret' for\n" " passwords and/or encryption keys\n" " -c, --cmd STRING execute command with its arguments\n" " from the given string\n" " -f, --format FMT specifies the block driver to use\n" " -r, --read-only export read-only\n" " -s, --snapshot use snapshot file\n" " -n, --nocache disable host cache\n" " -m, --misalign misalign allocations for O_DIRECT\n" " -k, --native-aio use kernel AIO implementation (on Linux only)\n" " -t, --cache=MODE use the given cache mode for the image\n" " -T, --trace FILE enable trace events listed in the given file\n" " -h, --help display this help and exit\n" " -V, --version output version information and exit\n" "\n" "See '%s -c help' for information on available commands." "\n", name, name); } static char *get_prompt(void) { static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ]; if (!prompt[0]) { snprintf(prompt, sizeof(prompt), "%s> ", progname); } return prompt; } static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque, const char *fmt, ...) { va_list ap; va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); } static void readline_flush_func(void *opaque) { fflush(stdout); } static void readline_func(void *opaque, const char *str, void *readline_opaque) { char **line = readline_opaque; *line = g_strdup(str); } static void completion_match(const char *cmd, void *opaque) { readline_add_completion(readline_state, cmd); } static void readline_completion_func(void *opaque, const char *str) { readline_set_completion_index(readline_state, strlen(str)); qemuio_complete_command(str, completion_match, NULL); } static char *fetchline_readline(void) { char *line = NULL; readline_start(readline_state, get_prompt(), 0, readline_func, &line); while (!line) { int ch = getchar(); if (ch == EOF) { break; } readline_handle_byte(readline_state, ch); } return line; } #define MAXREADLINESZ 1024 static char *fetchline_fgets(void) { char *p, *line = g_malloc(MAXREADLINESZ); if (!fgets(line, MAXREADLINESZ, stdin)) { g_free(line); return NULL; } p = line + strlen(line); if (p != line && p[-1] == '\n') { p[-1] = '\0'; } return line; } static char *fetchline(void) { if (readline_state) { return fetchline_readline(); } else { return fetchline_fgets(); } } static void prep_fetchline(void *opaque) { int *fetchable = opaque; qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL); *fetchable= 1; } static void command_loop(void) { int i, done = 0, fetchable = 0, prompted = 0; char *input; for (i = 0; !done && i < ncmdline; i++) { done = qemuio_command(qemuio_blk, cmdline[i]); } if (cmdline) { g_free(cmdline); return; } while (!done) { if (!prompted) { printf("%s", get_prompt()); fflush(stdout); qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable); prompted = 1; } main_loop_wait(false); if (!fetchable) { continue; } input = fetchline(); if (input == NULL) { break; } done = qemuio_command(qemuio_blk, input); g_free(input); prompted = 0; fetchable = 0; } qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL); } static void add_user_command(char *optarg) { cmdline = g_renew(char *, cmdline, ++ncmdline); cmdline[ncmdline-1] = optarg; } static void reenable_tty_echo(void) { qemu_set_tty_echo(STDIN_FILENO, true); } enum { OPTION_OBJECT = 256, OPTION_IMAGE_OPTS = 257, }; static QemuOptsList qemu_object_opts = { .name = "object", .implied_opt_name = "qom-type", .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), .desc = { { } }, }; static QemuOptsList file_opts = { .name = "file", .implied_opt_name = "file", .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), .desc = { /* no elements => accept any params */ { /* end of list */ } }, }; int main(int argc, char **argv) { int readonly = 0; const char *sopt = "hVc:d:f:rsnmgkt:T:"; const struct option lopt[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, { "offset", required_argument, NULL, 'o' }, { "cmd", required_argument, NULL, 'c' }, { "format", required_argument, NULL, 'f' }, { "read-only", no_argument, NULL, 'r' }, { "snapshot", no_argument, NULL, 's' }, { "nocache", no_argument, NULL, 'n' }, { "misalign", no_argument, NULL, 'm' }, { "native-aio", no_argument, NULL, 'k' }, { "discard", required_argument, NULL, 'd' }, { "cache", required_argument, NULL, 't' }, { "trace", required_argument, NULL, 'T' }, { "object", required_argument, NULL, OPTION_OBJECT }, { "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS }, { NULL, 0, NULL, 0 } }; int c; int opt_index = 0; int flags = BDRV_O_UNMAP; bool writethrough = true; Error *local_error = NULL; QDict *opts = NULL; const char *format = NULL; #ifdef CONFIG_POSIX signal(SIGPIPE, SIG_IGN); #endif progname = basename(argv[0]); qemu_init_exec_dir(argv[0]); module_call_init(MODULE_INIT_QOM); qemu_add_opts(&qemu_object_opts); bdrv_init(); while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { switch (c) { case 's': flags |= BDRV_O_SNAPSHOT; break; case 'n': flags |= BDRV_O_NOCACHE; writethrough = false; break; case 'd': if (bdrv_parse_discard_flags(optarg, &flags) < 0) { error_report("Invalid discard option: %s", optarg); exit(1); } break; case 'f': format = optarg; break; case 'c': add_user_command(optarg); break; case 'r': readonly = 1; break; case 'm': qemuio_misalign = true; break; case 'k': flags |= BDRV_O_NATIVE_AIO; break; case 't': if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { error_report("Invalid cache option: %s", optarg); exit(1); } break; case 'T': if (!trace_init_backends()) { exit(1); /* error message will have been printed */ } break; case 'V': printf("%s version %s\n", progname, QEMU_VERSION); exit(0); case 'h': usage(progname); exit(0); case OPTION_OBJECT: { QemuOpts *qopts; qopts = qemu_opts_parse_noisily(&qemu_object_opts, optarg, true); if (!qopts) { exit(1); } } break; case OPTION_IMAGE_OPTS: imageOpts = true; break; default: usage(progname); exit(1); } } if ((argc - optind) > 1) { usage(progname); exit(1); } if (format && imageOpts) { error_report("--image-opts and -f are mutually exclusive"); exit(1); } if (qemu_init_main_loop(&local_error)) { error_report_err(local_error); exit(1); } if (qemu_opts_foreach(&qemu_object_opts, user_creatable_add_opts_foreach, NULL, &local_error)) { error_report_err(local_error); exit(1); } /* initialize commands */ qemuio_add_command(&quit_cmd); qemuio_add_command(&open_cmd); qemuio_add_command(&close_cmd); if (isatty(STDIN_FILENO)) { readline_state = readline_init(readline_printf_func, readline_flush_func, NULL, readline_completion_func); qemu_set_tty_echo(STDIN_FILENO, false); atexit(reenable_tty_echo); } /* open the device */ if (!readonly) { flags |= BDRV_O_RDWR; } if ((argc - optind) == 1) { if (imageOpts) { QemuOpts *qopts = NULL; qopts = qemu_opts_parse_noisily(&file_opts, argv[optind], false); if (!qopts) { exit(1); } opts = qemu_opts_to_qdict(qopts, NULL); openfile(NULL, flags, writethrough, opts); } else { if (format) { opts = qdict_new(); qdict_put(opts, "driver", qstring_from_str(format)); } openfile(argv[optind], flags, writethrough, opts); } } command_loop(); /* * Make sure all outstanding requests complete before the program exits. */ bdrv_drain_all(); blk_unref(qemuio_blk); g_free(readline_state); return 0; }