| /* |
| * 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 <sys/time.h> |
| #include <sys/types.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <getopt.h> |
| #include <libgen.h> |
| |
| #include "qemu-io.h" |
| #include "qemu/main-loop.h" |
| #include "block/block_int.h" |
| #include "trace/control.h" |
| |
| #define CMD_NOFILE_OK 0x01 |
| |
| char *progname; |
| |
| BlockDriverState *qemuio_bs; |
| extern int qemuio_misalign; |
| |
| /* qemu-io commands passed using -c */ |
| static int ncmdline; |
| static char **cmdline; |
| |
| static int close_f(BlockDriverState *bs, int argc, char **argv) |
| { |
| bdrv_delete(bs); |
| qemuio_bs = 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, int growable) |
| { |
| if (qemuio_bs) { |
| fprintf(stderr, "file open already, try 'help close'\n"); |
| return 1; |
| } |
| |
| if (growable) { |
| if (bdrv_file_open(&qemuio_bs, name, NULL, flags)) { |
| fprintf(stderr, "%s: can't open device %s\n", progname, name); |
| return 1; |
| } |
| } else { |
| qemuio_bs = bdrv_new("hda"); |
| |
| if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) { |
| fprintf(stderr, "%s: can't open device %s\n", progname, name); |
| bdrv_delete(qemuio_bs); |
| qemuio_bs = NULL; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| 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" |
| " -g, -- allow file to grow (only applies to protocols)" |
| "\n"); |
| } |
| |
| static int open_f(BlockDriverState *bs, 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] [path]", |
| .oneline = "open the file specified by path", |
| .help = open_help, |
| }; |
| |
| static int open_f(BlockDriverState *bs, int argc, char **argv) |
| { |
| int flags = 0; |
| int readonly = 0; |
| int growable = 0; |
| int c; |
| |
| while ((c = getopt(argc, argv, "snrg")) != EOF) { |
| switch (c) { |
| case 's': |
| flags |= BDRV_O_SNAPSHOT; |
| break; |
| case 'n': |
| flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; |
| break; |
| case 'r': |
| readonly = 1; |
| break; |
| case 'g': |
| growable = 1; |
| break; |
| default: |
| return qemuio_command_usage(&open_cmd); |
| } |
| } |
| |
| if (!readonly) { |
| flags |= BDRV_O_RDWR; |
| } |
| |
| if (optind != argc - 1) { |
| return qemuio_command_usage(&open_cmd); |
| } |
| |
| return openfile(argv[optind], flags, growable); |
| } |
| |
| static int quit_f(BlockDriverState *bs, 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] [-c cmd] ... [file]\n" |
| "QEMU Disk exerciser\n" |
| "\n" |
| " -c, --cmd command to execute\n" |
| " -r, --read-only export read-only\n" |
| " -s, --snapshot use snapshot file\n" |
| " -n, --nocache disable host cache\n" |
| " -g, --growable allow file to grow (only applies to protocols)\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", |
| name); |
| } |
| |
| |
| #if defined(ENABLE_READLINE) |
| # include <readline/history.h> |
| # include <readline/readline.h> |
| #elif defined(ENABLE_EDITLINE) |
| # include <histedit.h> |
| #endif |
| |
| static char *get_prompt(void) |
| { |
| static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ]; |
| |
| if (!prompt[0]) { |
| snprintf(prompt, sizeof(prompt), "%s> ", progname); |
| } |
| |
| return prompt; |
| } |
| |
| #if defined(ENABLE_READLINE) |
| static char *fetchline(void) |
| { |
| char *line = readline(get_prompt()); |
| if (line && *line) { |
| add_history(line); |
| } |
| return line; |
| } |
| #elif defined(ENABLE_EDITLINE) |
| static char *el_get_prompt(EditLine *e) |
| { |
| return get_prompt(); |
| } |
| |
| static char *fetchline(void) |
| { |
| static EditLine *el; |
| static History *hist; |
| HistEvent hevent; |
| char *line; |
| int count; |
| |
| if (!el) { |
| hist = history_init(); |
| history(hist, &hevent, H_SETSIZE, 100); |
| el = el_init(progname, stdin, stdout, stderr); |
| el_source(el, NULL); |
| el_set(el, EL_SIGNAL, 1); |
| el_set(el, EL_PROMPT, el_get_prompt); |
| el_set(el, EL_HIST, history, (const char *)hist); |
| } |
| line = strdup(el_gets(el, &count)); |
| if (line) { |
| if (count > 0) { |
| line[count-1] = '\0'; |
| } |
| if (*line) { |
| history(hist, &hevent, H_ENTER, line); |
| } |
| } |
| return line; |
| } |
| #else |
| # define MAXREADLINESZ 1024 |
| static char *fetchline(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; |
| } |
| #endif |
| |
| 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_bs, 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_bs, 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_realloc(cmdline, ++ncmdline * sizeof(char *)); |
| cmdline[ncmdline-1] = optarg; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int readonly = 0; |
| int growable = 0; |
| const char *sopt = "hVc:d:rsnmgkt:T:"; |
| const struct option lopt[] = { |
| { "help", 0, NULL, 'h' }, |
| { "version", 0, NULL, 'V' }, |
| { "offset", 1, NULL, 'o' }, |
| { "cmd", 1, NULL, 'c' }, |
| { "read-only", 0, NULL, 'r' }, |
| { "snapshot", 0, NULL, 's' }, |
| { "nocache", 0, NULL, 'n' }, |
| { "misalign", 0, NULL, 'm' }, |
| { "growable", 0, NULL, 'g' }, |
| { "native-aio", 0, NULL, 'k' }, |
| { "discard", 1, NULL, 'd' }, |
| { "cache", 1, NULL, 't' }, |
| { "trace", 1, NULL, 'T' }, |
| { NULL, 0, NULL, 0 } |
| }; |
| int c; |
| int opt_index = 0; |
| int flags = BDRV_O_UNMAP; |
| |
| progname = basename(argv[0]); |
| |
| 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 | BDRV_O_CACHE_WB; |
| break; |
| case 'd': |
| if (bdrv_parse_discard_flags(optarg, &flags) < 0) { |
| error_report("Invalid discard option: %s", optarg); |
| exit(1); |
| } |
| break; |
| case 'c': |
| add_user_command(optarg); |
| break; |
| case 'r': |
| readonly = 1; |
| break; |
| case 'm': |
| qemuio_misalign = 1; |
| break; |
| case 'g': |
| growable = 1; |
| break; |
| case 'k': |
| flags |= BDRV_O_NATIVE_AIO; |
| break; |
| case 't': |
| if (bdrv_parse_cache_flags(optarg, &flags) < 0) { |
| error_report("Invalid cache option: %s", optarg); |
| exit(1); |
| } |
| break; |
| case 'T': |
| if (!trace_backend_init(optarg, NULL)) { |
| 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); |
| default: |
| usage(progname); |
| exit(1); |
| } |
| } |
| |
| if ((argc - optind) > 1) { |
| usage(progname); |
| exit(1); |
| } |
| |
| qemu_init_main_loop(); |
| bdrv_init(); |
| |
| /* initialize commands */ |
| qemuio_add_command(&quit_cmd); |
| qemuio_add_command(&open_cmd); |
| qemuio_add_command(&close_cmd); |
| |
| /* open the device */ |
| if (!readonly) { |
| flags |= BDRV_O_RDWR; |
| } |
| |
| if ((argc - optind) == 1) { |
| openfile(argv[optind], flags, growable); |
| } |
| command_loop(); |
| |
| /* |
| * Make sure all outstanding requests complete before the program exits. |
| */ |
| bdrv_drain_all(); |
| |
| if (qemuio_bs) { |
| bdrv_delete(qemuio_bs); |
| } |
| return 0; |
| } |
