/* * 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; #ifdef CONFIG_POSIX signal(SIGPIPE, SIG_IGN); #endif 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; }