| /* |
| * Command line utility to exercise the QEMU I/O path. |
| * |
| * Copyright (C) 2009-2016 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 "qapi/error.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qemu-io.h" |
| #include "sysemu/block-backend.h" |
| #include "block/block.h" |
| #include "block/block_int.h" /* for info_f() */ |
| #include "block/qapi.h" |
| #include "qemu/error-report.h" |
| #include "qemu/main-loop.h" |
| #include "qemu/option.h" |
| #include "qemu/timer.h" |
| #include "qemu/cutils.h" |
| #include "qemu/memalign.h" |
| |
| #define CMD_NOFILE_OK 0x01 |
| |
| bool qemuio_misalign; |
| |
| static cmdinfo_t *cmdtab; |
| static int ncmds; |
| |
| static int compare_cmdname(const void *a, const void *b) |
| { |
| return strcmp(((const cmdinfo_t *)a)->name, |
| ((const cmdinfo_t *)b)->name); |
| } |
| |
| void qemuio_add_command(const cmdinfo_t *ci) |
| { |
| /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK |
| * flags allow it not to be, so that combination is invalid. |
| * Catch it now rather than letting it manifest as a crash if a |
| * particular set of command line options are used. |
| */ |
| assert(ci->perm == 0 || |
| (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0); |
| cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds); |
| cmdtab[ncmds - 1] = *ci; |
| qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname); |
| } |
| |
| void qemuio_command_usage(const cmdinfo_t *ci) |
| { |
| printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline); |
| } |
| |
| static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct) |
| { |
| if (ct->flags & CMD_FLAG_GLOBAL) { |
| return 1; |
| } |
| if (!(ct->flags & CMD_NOFILE_OK) && !blk) { |
| fprintf(stderr, "no file open, try 'help open'\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc, |
| char **argv) |
| { |
| char *cmd = argv[0]; |
| |
| if (!init_check_command(blk, ct)) { |
| return -EINVAL; |
| } |
| |
| if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { |
| if (ct->argmax == -1) { |
| fprintf(stderr, |
| "bad argument count %d to %s, expected at least %d arguments\n", |
| argc-1, cmd, ct->argmin); |
| } else if (ct->argmin == ct->argmax) { |
| fprintf(stderr, |
| "bad argument count %d to %s, expected %d arguments\n", |
| argc-1, cmd, ct->argmin); |
| } else { |
| fprintf(stderr, |
| "bad argument count %d to %s, expected between %d and %d arguments\n", |
| argc-1, cmd, ct->argmin, ct->argmax); |
| } |
| return -EINVAL; |
| } |
| |
| /* |
| * Request additional permissions if necessary for this command. The caller |
| * is responsible for restoring the original permissions afterwards if this |
| * is what it wants. |
| * |
| * Coverity thinks that blk may be NULL in the following if condition. It's |
| * not so: in init_check_command() we fail if blk is NULL for command with |
| * both CMD_FLAG_GLOBAL and CMD_NOFILE_OK flags unset. And in |
| * qemuio_add_command() we assert that command with non-zero .perm field |
| * doesn't set this flags. So, the following assertion is to silence |
| * Coverity: |
| */ |
| assert(blk || !ct->perm); |
| if (ct->perm && blk_is_available(blk)) { |
| uint64_t orig_perm, orig_shared_perm; |
| blk_get_perm(blk, &orig_perm, &orig_shared_perm); |
| |
| if (ct->perm & ~orig_perm) { |
| uint64_t new_perm; |
| Error *local_err = NULL; |
| int ret; |
| |
| new_perm = orig_perm | ct->perm; |
| |
| ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err); |
| if (ret < 0) { |
| error_report_err(local_err); |
| return ret; |
| } |
| } |
| } |
| |
| qemu_reset_optind(); |
| return ct->cfunc(blk, argc, argv); |
| } |
| |
| static const cmdinfo_t *find_command(const char *cmd) |
| { |
| cmdinfo_t *ct; |
| |
| for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { |
| if (strcmp(ct->name, cmd) == 0 || |
| (ct->altname && strcmp(ct->altname, cmd) == 0)) |
| { |
| return (const cmdinfo_t *)ct; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Invoke fn() for commands with a matching prefix */ |
| void qemuio_complete_command(const char *input, |
| void (*fn)(const char *cmd, void *opaque), |
| void *opaque) |
| { |
| cmdinfo_t *ct; |
| size_t input_len = strlen(input); |
| |
| for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { |
| if (strncmp(input, ct->name, input_len) == 0) { |
| fn(ct->name, opaque); |
| } |
| } |
| } |
| |
| static char **breakline(char *input, int *count) |
| { |
| int c = 0; |
| char *p; |
| char **rval = g_new0(char *, 1); |
| |
| while (rval && (p = qemu_strsep(&input, " ")) != NULL) { |
| if (!*p) { |
| continue; |
| } |
| c++; |
| rval = g_renew(char *, rval, (c + 1)); |
| rval[c - 1] = p; |
| rval[c] = NULL; |
| } |
| *count = c; |
| return rval; |
| } |
| |
| static int64_t cvtnum(const char *s) |
| { |
| int err; |
| uint64_t value; |
| |
| err = qemu_strtosz(s, NULL, &value); |
| if (err < 0) { |
| return err; |
| } |
| if (value > INT64_MAX) { |
| return -ERANGE; |
| } |
| return value; |
| } |
| |
| static void print_cvtnum_err(int64_t rc, const char *arg) |
| { |
| switch (rc) { |
| case -EINVAL: |
| printf("Parsing error: non-numeric argument," |
| " or extraneous/unrecognized suffix -- %s\n", arg); |
| break; |
| case -ERANGE: |
| printf("Parsing error: argument too large -- %s\n", arg); |
| break; |
| default: |
| printf("Parsing error: %s\n", arg); |
| } |
| } |
| |
| #define EXABYTES(x) ((long long)(x) << 60) |
| #define PETABYTES(x) ((long long)(x) << 50) |
| #define TERABYTES(x) ((long long)(x) << 40) |
| #define GIGABYTES(x) ((long long)(x) << 30) |
| #define MEGABYTES(x) ((long long)(x) << 20) |
| #define KILOBYTES(x) ((long long)(x) << 10) |
| |
| #define TO_EXABYTES(x) ((x) / EXABYTES(1)) |
| #define TO_PETABYTES(x) ((x) / PETABYTES(1)) |
| #define TO_TERABYTES(x) ((x) / TERABYTES(1)) |
| #define TO_GIGABYTES(x) ((x) / GIGABYTES(1)) |
| #define TO_MEGABYTES(x) ((x) / MEGABYTES(1)) |
| #define TO_KILOBYTES(x) ((x) / KILOBYTES(1)) |
| |
| static void cvtstr(double value, char *str, size_t size) |
| { |
| char *trim; |
| const char *suffix; |
| |
| if (value >= EXABYTES(1)) { |
| suffix = " EiB"; |
| snprintf(str, size - 4, "%.3f", TO_EXABYTES(value)); |
| } else if (value >= PETABYTES(1)) { |
| suffix = " PiB"; |
| snprintf(str, size - 4, "%.3f", TO_PETABYTES(value)); |
| } else if (value >= TERABYTES(1)) { |
| suffix = " TiB"; |
| snprintf(str, size - 4, "%.3f", TO_TERABYTES(value)); |
| } else if (value >= GIGABYTES(1)) { |
| suffix = " GiB"; |
| snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value)); |
| } else if (value >= MEGABYTES(1)) { |
| suffix = " MiB"; |
| snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value)); |
| } else if (value >= KILOBYTES(1)) { |
| suffix = " KiB"; |
| snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value)); |
| } else { |
| suffix = " bytes"; |
| snprintf(str, size - 6, "%f", value); |
| } |
| |
| trim = strstr(str, ".000"); |
| if (trim) { |
| strcpy(trim, suffix); |
| } else { |
| strcat(str, suffix); |
| } |
| } |
| |
| |
| |
| static struct timespec tsub(struct timespec t1, struct timespec t2) |
| { |
| t1.tv_nsec -= t2.tv_nsec; |
| if (t1.tv_nsec < 0) { |
| t1.tv_nsec += NANOSECONDS_PER_SECOND; |
| t1.tv_sec--; |
| } |
| t1.tv_sec -= t2.tv_sec; |
| return t1; |
| } |
| |
| static double tdiv(double value, struct timespec tv) |
| { |
| double seconds = tv.tv_sec + (tv.tv_nsec / 1e9); |
| return value / seconds; |
| } |
| |
| #define HOURS(sec) ((sec) / (60 * 60)) |
| #define MINUTES(sec) (((sec) % (60 * 60)) / 60) |
| #define SECONDS(sec) ((sec) % 60) |
| |
| enum { |
| DEFAULT_TIME = 0x0, |
| TERSE_FIXED_TIME = 0x1, |
| VERBOSE_FIXED_TIME = 0x2, |
| }; |
| |
| static void timestr(struct timespec *tv, char *ts, size_t size, int format) |
| { |
| double frac_sec = tv->tv_nsec / 1e9; |
| |
| if (format & TERSE_FIXED_TIME) { |
| if (!HOURS(tv->tv_sec)) { |
| snprintf(ts, size, "%u:%05.2f", |
| (unsigned int) MINUTES(tv->tv_sec), |
| SECONDS(tv->tv_sec) + frac_sec); |
| return; |
| } |
| format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */ |
| } |
| |
| if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) { |
| snprintf(ts, size, "%u:%02u:%05.2f", |
| (unsigned int) HOURS(tv->tv_sec), |
| (unsigned int) MINUTES(tv->tv_sec), |
| SECONDS(tv->tv_sec) + frac_sec); |
| } else { |
| snprintf(ts, size, "%05.2f sec", frac_sec); |
| } |
| } |
| |
| /* |
| * Parse the pattern argument to various sub-commands. |
| * |
| * Because the pattern is used as an argument to memset it must evaluate |
| * to an unsigned integer that fits into a single byte. |
| */ |
| static int parse_pattern(const char *arg) |
| { |
| char *endptr = NULL; |
| long pattern; |
| |
| pattern = strtol(arg, &endptr, 0); |
| if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') { |
| printf("%s is not a valid pattern byte\n", arg); |
| return -1; |
| } |
| |
| return pattern; |
| } |
| |
| /* |
| * Memory allocation helpers. |
| * |
| * Make sure memory is aligned by default, or purposefully misaligned if |
| * that is specified on the command line. |
| */ |
| |
| #define MISALIGN_OFFSET 16 |
| static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern) |
| { |
| void *buf; |
| |
| if (qemuio_misalign) { |
| len += MISALIGN_OFFSET; |
| } |
| buf = blk_blockalign(blk, len); |
| memset(buf, pattern, len); |
| if (qemuio_misalign) { |
| buf += MISALIGN_OFFSET; |
| } |
| return buf; |
| } |
| |
| static void qemu_io_free(void *p) |
| { |
| if (qemuio_misalign) { |
| p -= MISALIGN_OFFSET; |
| } |
| qemu_vfree(p); |
| } |
| |
| /* |
| * qemu_io_alloc_from_file() |
| * |
| * Allocates the buffer and populates it with the content of the given file |
| * up to @len bytes. If the file length is less than @len, then the buffer |
| * is populated with the file content cyclically. |
| * |
| * @blk - the block backend where the buffer content is going to be written to |
| * @len - the buffer length |
| * @file_name - the file to read the content from |
| * |
| * Returns: the buffer pointer on success |
| * NULL on error |
| */ |
| static void *qemu_io_alloc_from_file(BlockBackend *blk, size_t len, |
| const char *file_name) |
| { |
| char *buf, *buf_origin; |
| FILE *f = fopen(file_name, "r"); |
| int pattern_len; |
| |
| if (!f) { |
| perror(file_name); |
| return NULL; |
| } |
| |
| if (qemuio_misalign) { |
| len += MISALIGN_OFFSET; |
| } |
| |
| buf_origin = buf = blk_blockalign(blk, len); |
| |
| if (qemuio_misalign) { |
| buf_origin += MISALIGN_OFFSET; |
| buf += MISALIGN_OFFSET; |
| len -= MISALIGN_OFFSET; |
| } |
| |
| pattern_len = fread(buf_origin, 1, len, f); |
| |
| if (ferror(f)) { |
| perror(file_name); |
| goto error; |
| } |
| |
| if (pattern_len == 0) { |
| fprintf(stderr, "%s: file is empty\n", file_name); |
| goto error; |
| } |
| |
| fclose(f); |
| f = NULL; |
| |
| if (len > pattern_len) { |
| len -= pattern_len; |
| buf += pattern_len; |
| |
| while (len > 0) { |
| size_t len_to_copy = MIN(pattern_len, len); |
| |
| memcpy(buf, buf_origin, len_to_copy); |
| |
| len -= len_to_copy; |
| buf += len_to_copy; |
| } |
| } |
| |
| return buf_origin; |
| |
| error: |
| qemu_io_free(buf_origin); |
| if (f) { |
| fclose(f); |
| } |
| return NULL; |
| } |
| |
| static void dump_buffer(const void *buffer, int64_t offset, int64_t len) |
| { |
| uint64_t i; |
| int j; |
| const uint8_t *p; |
| |
| for (i = 0, p = buffer; i < len; i += 16) { |
| const uint8_t *s = p; |
| |
| printf("%08" PRIx64 ": ", offset + i); |
| for (j = 0; j < 16 && i + j < len; j++, p++) { |
| printf("%02x ", *p); |
| } |
| printf(" "); |
| for (j = 0; j < 16 && i + j < len; j++, s++) { |
| if (isalnum(*s)) { |
| printf("%c", *s); |
| } else { |
| printf("."); |
| } |
| } |
| printf("\n"); |
| } |
| } |
| |
| static void print_report(const char *op, struct timespec *t, int64_t offset, |
| int64_t count, int64_t total, int cnt, bool Cflag) |
| { |
| char s1[64], s2[64], ts[64]; |
| |
| timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); |
| if (!Cflag) { |
| cvtstr((double)total, s1, sizeof(s1)); |
| cvtstr(tdiv((double)total, *t), s2, sizeof(s2)); |
| printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n", |
| op, total, count, offset); |
| printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n", |
| s1, cnt, ts, s2, tdiv((double)cnt, *t)); |
| } else {/* bytes,ops,time,bytes/sec,ops/sec */ |
| printf("%"PRId64",%d,%s,%.3f,%.3f\n", |
| total, cnt, ts, |
| tdiv((double)total, *t), |
| tdiv((double)cnt, *t)); |
| } |
| } |
| |
| /* |
| * Parse multiple length statements for vectored I/O, and construct an I/O |
| * vector matching it. |
| */ |
| static void * |
| create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov, |
| int pattern) |
| { |
| size_t *sizes = g_new0(size_t, nr_iov); |
| size_t count = 0; |
| void *buf = NULL; |
| void *p; |
| int i; |
| |
| for (i = 0; i < nr_iov; i++) { |
| char *arg = argv[i]; |
| int64_t len; |
| |
| len = cvtnum(arg); |
| if (len < 0) { |
| print_cvtnum_err(len, arg); |
| goto fail; |
| } |
| |
| if (len > BDRV_REQUEST_MAX_BYTES) { |
| printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg, |
| (uint64_t)BDRV_REQUEST_MAX_BYTES); |
| goto fail; |
| } |
| |
| if (count > BDRV_REQUEST_MAX_BYTES - len) { |
| printf("The total number of bytes exceed the maximum size %" PRIu64 |
| "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES); |
| goto fail; |
| } |
| |
| sizes[i] = len; |
| count += len; |
| } |
| |
| qemu_iovec_init(qiov, nr_iov); |
| |
| buf = p = qemu_io_alloc(blk, count, pattern); |
| |
| for (i = 0; i < nr_iov; i++) { |
| qemu_iovec_add(qiov, p, sizes[i]); |
| p += sizes[i]; |
| } |
| |
| fail: |
| g_free(sizes); |
| return buf; |
| } |
| |
| static int do_pread(BlockBackend *blk, char *buf, int64_t offset, |
| int64_t bytes, int64_t *total) |
| { |
| int ret; |
| |
| if (bytes > INT_MAX) { |
| return -ERANGE; |
| } |
| |
| ret = blk_pread(blk, offset, bytes, (uint8_t *)buf, 0); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = bytes; |
| return 1; |
| } |
| |
| static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, |
| int64_t bytes, int flags, int64_t *total) |
| { |
| int ret; |
| |
| if (bytes > INT_MAX) { |
| return -ERANGE; |
| } |
| |
| ret = blk_pwrite(blk, offset, bytes, (uint8_t *)buf, flags); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = bytes; |
| return 1; |
| } |
| |
| static int do_pwrite_zeroes(BlockBackend *blk, int64_t offset, |
| int64_t bytes, int flags, int64_t *total) |
| { |
| int ret = blk_pwrite_zeroes(blk, offset, bytes, |
| flags | BDRV_REQ_ZERO_WRITE); |
| |
| if (ret < 0) { |
| return ret; |
| } |
| *total = bytes; |
| return 1; |
| } |
| |
| static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset, |
| int64_t bytes, int64_t *total) |
| { |
| int ret; |
| |
| if (bytes > BDRV_REQUEST_MAX_BYTES) { |
| return -ERANGE; |
| } |
| |
| ret = blk_pwrite_compressed(blk, offset, bytes, buf); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = bytes; |
| return 1; |
| } |
| |
| static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset, |
| int64_t count, int64_t *total) |
| { |
| if (count > INT_MAX) { |
| return -ERANGE; |
| } |
| |
| *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count); |
| if (*total < 0) { |
| return *total; |
| } |
| return 1; |
| } |
| |
| static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset, |
| int64_t count, int64_t *total) |
| { |
| if (count > INT_MAX) { |
| return -ERANGE; |
| } |
| |
| *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count); |
| if (*total < 0) { |
| return *total; |
| } |
| return 1; |
| } |
| |
| #define NOT_DONE 0x7fffffff |
| static void aio_rw_done(void *opaque, int ret) |
| { |
| *(int *)opaque = ret; |
| } |
| |
| static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov, |
| int64_t offset, int *total) |
| { |
| int async_ret = NOT_DONE; |
| |
| blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret); |
| while (async_ret == NOT_DONE) { |
| main_loop_wait(false); |
| } |
| |
| *total = qiov->size; |
| return async_ret < 0 ? async_ret : 1; |
| } |
| |
| static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov, |
| int64_t offset, int flags, int *total) |
| { |
| int async_ret = NOT_DONE; |
| |
| blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret); |
| while (async_ret == NOT_DONE) { |
| main_loop_wait(false); |
| } |
| |
| *total = qiov->size; |
| return async_ret < 0 ? async_ret : 1; |
| } |
| |
| static void read_help(void) |
| { |
| printf( |
| "\n" |
| " reads a range of bytes from the given offset\n" |
| "\n" |
| " Example:\n" |
| " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n" |
| "\n" |
| " Reads a segment of the currently open file, optionally dumping it to the\n" |
| " standard output stream (with -v option) for subsequent inspection.\n" |
| " -b, -- read from the VM state rather than the virtual disk\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -l, -- length for pattern verification (only with -P)\n" |
| " -p, -- ignored for backwards compatibility\n" |
| " -P, -- use a pattern to verify read data\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| " -s, -- start offset for pattern verification (only with -P)\n" |
| " -v, -- dump buffer to standard output\n" |
| "\n"); |
| } |
| |
| static int read_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t read_cmd = { |
| .name = "read", |
| .altname = "r", |
| .cfunc = read_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len", |
| .oneline = "reads a number of bytes at a specified offset", |
| .help = read_help, |
| }; |
| |
| static int read_f(BlockBackend *blk, int argc, char **argv) |
| { |
| struct timespec t1, t2; |
| bool Cflag = false, qflag = false, vflag = false; |
| bool Pflag = false, sflag = false, lflag = false, bflag = false; |
| int c, cnt, ret; |
| char *buf; |
| int64_t offset; |
| int64_t count; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int64_t total = 0; |
| int pattern = 0; |
| int64_t pattern_offset = 0, pattern_count = 0; |
| |
| while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) { |
| switch (c) { |
| case 'b': |
| bflag = true; |
| break; |
| case 'C': |
| Cflag = true; |
| break; |
| case 'l': |
| lflag = true; |
| pattern_count = cvtnum(optarg); |
| if (pattern_count < 0) { |
| print_cvtnum_err(pattern_count, optarg); |
| return pattern_count; |
| } |
| break; |
| case 'p': |
| /* Ignored for backwards compatibility */ |
| break; |
| case 'P': |
| Pflag = true; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return -EINVAL; |
| } |
| break; |
| case 'q': |
| qflag = true; |
| break; |
| case 's': |
| sflag = true; |
| pattern_offset = cvtnum(optarg); |
| if (pattern_offset < 0) { |
| print_cvtnum_err(pattern_offset, optarg); |
| return pattern_offset; |
| } |
| break; |
| case 'v': |
| vflag = true; |
| break; |
| default: |
| qemuio_command_usage(&read_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind != argc - 2) { |
| qemuio_command_usage(&read_cmd); |
| return -EINVAL; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[optind]); |
| return offset; |
| } |
| |
| optind++; |
| count = cvtnum(argv[optind]); |
| if (count < 0) { |
| print_cvtnum_err(count, argv[optind]); |
| return count; |
| } else if (count > BDRV_REQUEST_MAX_BYTES) { |
| printf("length cannot exceed %" PRIu64 ", given %s\n", |
| (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); |
| return -EINVAL; |
| } |
| |
| if (!Pflag && (lflag || sflag)) { |
| qemuio_command_usage(&read_cmd); |
| return -EINVAL; |
| } |
| |
| if (!lflag) { |
| pattern_count = count - pattern_offset; |
| } |
| |
| if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { |
| printf("pattern verification range exceeds end of read data\n"); |
| return -EINVAL; |
| } |
| |
| if (bflag) { |
| if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { |
| printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", |
| offset); |
| return -EINVAL; |
| } |
| if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { |
| printf("%"PRId64" is not a sector-aligned value for 'count'\n", |
| count); |
| return -EINVAL; |
| } |
| } |
| |
| buf = qemu_io_alloc(blk, count, 0xab); |
| |
| clock_gettime(CLOCK_MONOTONIC, &t1); |
| if (bflag) { |
| ret = do_load_vmstate(blk, buf, offset, count, &total); |
| } else { |
| ret = do_pread(blk, buf, offset, count, &total); |
| } |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("read failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| cnt = ret; |
| |
| ret = 0; |
| |
| if (Pflag) { |
| void *cmp_buf = g_malloc(pattern_count); |
| memset(cmp_buf, pattern, pattern_count); |
| if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) { |
| printf("Pattern verification failed at offset %" |
| PRId64 ", %"PRId64" bytes\n", |
| offset + pattern_offset, pattern_count); |
| ret = -EINVAL; |
| } |
| g_free(cmp_buf); |
| } |
| |
| if (qflag) { |
| goto out; |
| } |
| |
| if (vflag) { |
| dump_buffer(buf, offset, count); |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, t1); |
| print_report("read", &t2, offset, count, total, cnt, Cflag); |
| |
| out: |
| qemu_io_free(buf); |
| return ret; |
| } |
| |
| static void readv_help(void) |
| { |
| printf( |
| "\n" |
| " reads a range of bytes from the given offset into multiple buffers\n" |
| "\n" |
| " Example:\n" |
| " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" |
| "\n" |
| " Reads a segment of the currently open file, optionally dumping it to the\n" |
| " standard output stream (with -v option) for subsequent inspection.\n" |
| " Uses multiple iovec buffers if more than one byte range is specified.\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -P, -- use a pattern to verify read data\n" |
| " -v, -- dump buffer to standard output\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int readv_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t readv_cmd = { |
| .name = "readv", |
| .cfunc = readv_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cqv] [-P pattern] off len [len..]", |
| .oneline = "reads a number of bytes at a specified offset", |
| .help = readv_help, |
| }; |
| |
| static int readv_f(BlockBackend *blk, int argc, char **argv) |
| { |
| struct timespec t1, t2; |
| bool Cflag = false, qflag = false, vflag = false; |
| int c, cnt, ret; |
| char *buf; |
| int64_t offset; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int total = 0; |
| int nr_iov; |
| QEMUIOVector qiov; |
| int pattern = 0; |
| bool Pflag = false; |
| |
| while ((c = getopt(argc, argv, "CP:qv")) != -1) { |
| switch (c) { |
| case 'C': |
| Cflag = true; |
| break; |
| case 'P': |
| Pflag = true; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return -EINVAL; |
| } |
| break; |
| case 'q': |
| qflag = true; |
| break; |
| case 'v': |
| vflag = true; |
| break; |
| default: |
| qemuio_command_usage(&readv_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind > argc - 2) { |
| qemuio_command_usage(&readv_cmd); |
| return -EINVAL; |
| } |
| |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[optind]); |
| return offset; |
| } |
| optind++; |
| |
| nr_iov = argc - optind; |
| buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab); |
| if (buf == NULL) { |
| return -EINVAL; |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &t1); |
| ret = do_aio_readv(blk, &qiov, offset, &total); |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("readv failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| cnt = ret; |
| |
| ret = 0; |
| |
| if (Pflag) { |
| void *cmp_buf = g_malloc(qiov.size); |
| memset(cmp_buf, pattern, qiov.size); |
| if (memcmp(buf, cmp_buf, qiov.size)) { |
| printf("Pattern verification failed at offset %" |
| PRId64 ", %zu bytes\n", offset, qiov.size); |
| ret = -EINVAL; |
| } |
| g_free(cmp_buf); |
| } |
| |
| if (qflag) { |
| goto out; |
| } |
| |
| if (vflag) { |
| dump_buffer(buf, offset, qiov.size); |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, t1); |
| print_report("read", &t2, offset, qiov.size, total, cnt, Cflag); |
| |
| out: |
| qemu_iovec_destroy(&qiov); |
| qemu_io_free(buf); |
| return ret; |
| } |
| |
| static void write_help(void) |
| { |
| printf( |
| "\n" |
| " writes a range of bytes from the given offset\n" |
| "\n" |
| " Example:\n" |
| " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n" |
| "\n" |
| " Writes into a segment of the currently open file, using a buffer\n" |
| " filled with a set pattern (0xcdcdcdcd).\n" |
| " -b, -- write to the VM state rather than the virtual disk\n" |
| " -c, -- write compressed data with blk_write_compressed\n" |
| " -f, -- use Force Unit Access semantics\n" |
| " -n, -- with -z, don't allow slow fallback\n" |
| " -p, -- ignored for backwards compatibility\n" |
| " -P, -- use different pattern to fill file\n" |
| " -s, -- use a pattern file to fill the write buffer\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| " -u, -- with -z, allow unmapping\n" |
| " -z, -- write zeroes using blk_pwrite_zeroes\n" |
| "\n"); |
| } |
| |
| static int write_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t write_cmd = { |
| .name = "write", |
| .altname = "w", |
| .cfunc = write_f, |
| .perm = BLK_PERM_WRITE, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-bcCfnquz] [-P pattern | -s source_file] off len", |
| .oneline = "writes a number of bytes at a specified offset", |
| .help = write_help, |
| }; |
| |
| static int write_f(BlockBackend *blk, int argc, char **argv) |
| { |
| struct timespec t1, t2; |
| bool Cflag = false, qflag = false, bflag = false; |
| bool Pflag = false, zflag = false, cflag = false, sflag = false; |
| int flags = 0; |
| int c, cnt, ret; |
| char *buf = NULL; |
| int64_t offset; |
| int64_t count; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int64_t total = 0; |
| int pattern = 0xcd; |
| const char *file_name = NULL; |
| |
| while ((c = getopt(argc, argv, "bcCfnpP:qs:uz")) != -1) { |
| switch (c) { |
| case 'b': |
| bflag = true; |
| break; |
| case 'c': |
| cflag = true; |
| break; |
| case 'C': |
| Cflag = true; |
| break; |
| case 'f': |
| flags |= BDRV_REQ_FUA; |
| break; |
| case 'n': |
| flags |= BDRV_REQ_NO_FALLBACK; |
| break; |
| case 'p': |
| /* Ignored for backwards compatibility */ |
| break; |
| case 'P': |
| Pflag = true; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return -EINVAL; |
| } |
| break; |
| case 'q': |
| qflag = true; |
| break; |
| case 's': |
| sflag = true; |
| file_name = optarg; |
| break; |
| case 'u': |
| flags |= BDRV_REQ_MAY_UNMAP; |
| break; |
| case 'z': |
| zflag = true; |
| break; |
| default: |
| qemuio_command_usage(&write_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind != argc - 2) { |
| qemuio_command_usage(&write_cmd); |
| return -EINVAL; |
| } |
| |
| if (bflag && zflag) { |
| printf("-b and -z cannot be specified at the same time\n"); |
| return -EINVAL; |
| } |
| |
| if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) { |
| printf("-f and -b or -c cannot be specified at the same time\n"); |
| return -EINVAL; |
| } |
| |
| if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) { |
| printf("-n requires -z to be specified\n"); |
| return -EINVAL; |
| } |
| |
| if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) { |
| printf("-u requires -z to be specified\n"); |
| return -EINVAL; |
| } |
| |
| if (zflag + Pflag + sflag > 1) { |
| printf("Only one of -z, -P, and -s " |
| "can be specified at the same time\n"); |
| return -EINVAL; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[optind]); |
| return offset; |
| } |
| |
| optind++; |
| count = cvtnum(argv[optind]); |
| if (count < 0) { |
| print_cvtnum_err(count, argv[optind]); |
| return count; |
| } else if (count > BDRV_REQUEST_MAX_BYTES && |
| !(flags & BDRV_REQ_NO_FALLBACK)) { |
| printf("length cannot exceed %" PRIu64 " without -n, given %s\n", |
| (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); |
| return -EINVAL; |
| } |
| |
| if (bflag || cflag) { |
| if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { |
| printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", |
| offset); |
| return -EINVAL; |
| } |
| |
| if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { |
| printf("%"PRId64" is not a sector-aligned value for 'count'\n", |
| count); |
| return -EINVAL; |
| } |
| } |
| |
| if (!zflag) { |
| if (sflag) { |
| buf = qemu_io_alloc_from_file(blk, count, file_name); |
| if (!buf) { |
| return -EINVAL; |
| } |
| } else { |
| buf = qemu_io_alloc(blk, count, pattern); |
| } |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &t1); |
| if (bflag) { |
| ret = do_save_vmstate(blk, buf, offset, count, &total); |
| } else if (zflag) { |
| ret = do_pwrite_zeroes(blk, offset, count, flags, &total); |
| } else if (cflag) { |
| ret = do_write_compressed(blk, buf, offset, count, &total); |
| } else { |
| ret = do_pwrite(blk, buf, offset, count, flags, &total); |
| } |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("write failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| cnt = ret; |
| |
| ret = 0; |
| |
| if (qflag) { |
| goto out; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, t1); |
| print_report("wrote", &t2, offset, count, total, cnt, Cflag); |
| |
| out: |
| if (!zflag) { |
| qemu_io_free(buf); |
| } |
| return ret; |
| } |
| |
| static void |
| writev_help(void) |
| { |
| printf( |
| "\n" |
| " writes a range of bytes from the given offset source from multiple buffers\n" |
| "\n" |
| " Example:\n" |
| " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" |
| "\n" |
| " Writes into a segment of the currently open file, using a buffer\n" |
| " filled with a set pattern (0xcdcdcdcd).\n" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -f, -- use Force Unit Access semantics\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int writev_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t writev_cmd = { |
| .name = "writev", |
| .cfunc = writev_f, |
| .perm = BLK_PERM_WRITE, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cfq] [-P pattern] off len [len..]", |
| .oneline = "writes a number of bytes at a specified offset", |
| .help = writev_help, |
| }; |
| |
| static int writev_f(BlockBackend *blk, int argc, char **argv) |
| { |
| struct timespec t1, t2; |
| bool Cflag = false, qflag = false; |
| int flags = 0; |
| int c, cnt, ret; |
| char *buf; |
| int64_t offset; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int total = 0; |
| int nr_iov; |
| int pattern = 0xcd; |
| QEMUIOVector qiov; |
| |
| while ((c = getopt(argc, argv, "CfqP:")) != -1) { |
| switch (c) { |
| case 'C': |
| Cflag = true; |
| break; |
| case 'f': |
| flags |= BDRV_REQ_FUA; |
| break; |
| case 'q': |
| qflag = true; |
| break; |
| case 'P': |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return -EINVAL; |
| } |
| break; |
| default: |
| qemuio_command_usage(&writev_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind > argc - 2) { |
| qemuio_command_usage(&writev_cmd); |
| return -EINVAL; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[optind]); |
| return offset; |
| } |
| optind++; |
| |
| nr_iov = argc - optind; |
| buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern); |
| if (buf == NULL) { |
| return -EINVAL; |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &t1); |
| ret = do_aio_writev(blk, &qiov, offset, flags, &total); |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("writev failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| cnt = ret; |
| |
| ret = 0; |
| |
| if (qflag) { |
| goto out; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, t1); |
| print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); |
| out: |
| qemu_iovec_destroy(&qiov); |
| qemu_io_free(buf); |
| return ret; |
| } |
| |
| struct aio_ctx { |
| BlockBackend *blk; |
| QEMUIOVector qiov; |
| int64_t offset; |
| char *buf; |
| bool qflag; |
| bool vflag; |
| bool Cflag; |
| bool Pflag; |
| bool zflag; |
| BlockAcctCookie acct; |
| int pattern; |
| struct timespec t1; |
| }; |
| |
| static void aio_write_done(void *opaque, int ret) |
| { |
| struct aio_ctx *ctx = opaque; |
| struct timespec t2; |
| |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| |
| if (ret < 0) { |
| printf("aio_write failed: %s\n", strerror(-ret)); |
| block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); |
| goto out; |
| } |
| |
| block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); |
| |
| if (ctx->qflag) { |
| goto out; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, ctx->t1); |
| print_report("wrote", &t2, ctx->offset, ctx->qiov.size, |
| ctx->qiov.size, 1, ctx->Cflag); |
| out: |
| if (!ctx->zflag) { |
| qemu_io_free(ctx->buf); |
| qemu_iovec_destroy(&ctx->qiov); |
| } |
| g_free(ctx); |
| } |
| |
| static void aio_read_done(void *opaque, int ret) |
| { |
| struct aio_ctx *ctx = opaque; |
| struct timespec t2; |
| |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("readv failed: %s\n", strerror(-ret)); |
| block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); |
| goto out; |
| } |
| |
| if (ctx->Pflag) { |
| void *cmp_buf = g_malloc(ctx->qiov.size); |
| |
| memset(cmp_buf, ctx->pattern, ctx->qiov.size); |
| if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { |
| printf("Pattern verification failed at offset %" |
| PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size); |
| } |
| g_free(cmp_buf); |
| } |
| |
| block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); |
| |
| if (ctx->qflag) { |
| goto out; |
| } |
| |
| if (ctx->vflag) { |
| dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, ctx->t1); |
| print_report("read", &t2, ctx->offset, ctx->qiov.size, |
| ctx->qiov.size, 1, ctx->Cflag); |
| out: |
| qemu_io_free(ctx->buf); |
| qemu_iovec_destroy(&ctx->qiov); |
| g_free(ctx); |
| } |
| |
| static void aio_read_help(void) |
| { |
| printf( |
| "\n" |
| " asynchronously reads a range of bytes from the given offset\n" |
| "\n" |
| " Example:\n" |
| " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" |
| "\n" |
| " Reads a segment of the currently open file, optionally dumping it to the\n" |
| " standard output stream (with -v option) for subsequent inspection.\n" |
| " The read is performed asynchronously and the aio_flush command must be\n" |
| " used to ensure all outstanding aio requests have been completed.\n" |
| " Note that due to its asynchronous nature, this command will be\n" |
| " considered successful once the request is submitted, independently\n" |
| " of potential I/O errors or pattern mismatches.\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -P, -- use a pattern to verify read data\n" |
| " -i, -- treat request as invalid, for exercising stats\n" |
| " -v, -- dump buffer to standard output\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int aio_read_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t aio_read_cmd = { |
| .name = "aio_read", |
| .cfunc = aio_read_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Ciqv] [-P pattern] off len [len..]", |
| .oneline = "asynchronously reads a number of bytes", |
| .help = aio_read_help, |
| }; |
| |
| static int aio_read_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int nr_iov, c; |
| struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| |
| ctx->blk = blk; |
| while ((c = getopt(argc, argv, "CP:iqv")) != -1) { |
| switch (c) { |
| case 'C': |
| ctx->Cflag = true; |
| break; |
| case 'P': |
| ctx->Pflag = true; |
| ctx->pattern = parse_pattern(optarg); |
| if (ctx->pattern < 0) { |
| g_free(ctx); |
| return -EINVAL; |
| } |
| break; |
| case 'i': |
| printf("injecting invalid read request\n"); |
| block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); |
| g_free(ctx); |
| return 0; |
| case 'q': |
| ctx->qflag = true; |
| break; |
| case 'v': |
| ctx->vflag = true; |
| break; |
| default: |
| g_free(ctx); |
| qemuio_command_usage(&aio_read_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind > argc - 2) { |
| g_free(ctx); |
| qemuio_command_usage(&aio_read_cmd); |
| return -EINVAL; |
| } |
| |
| ctx->offset = cvtnum(argv[optind]); |
| if (ctx->offset < 0) { |
| int ret = ctx->offset; |
| print_cvtnum_err(ret, argv[optind]); |
| g_free(ctx); |
| return ret; |
| } |
| optind++; |
| |
| nr_iov = argc - optind; |
| ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab); |
| if (ctx->buf == NULL) { |
| block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); |
| g_free(ctx); |
| return -EINVAL; |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &ctx->t1); |
| block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, |
| BLOCK_ACCT_READ); |
| blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx); |
| return 0; |
| } |
| |
| static void aio_write_help(void) |
| { |
| printf( |
| "\n" |
| " asynchronously writes a range of bytes from the given offset source\n" |
| " from multiple buffers\n" |
| "\n" |
| " Example:\n" |
| " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" |
| "\n" |
| " Writes into a segment of the currently open file, using a buffer\n" |
| " filled with a set pattern (0xcdcdcdcd).\n" |
| " The write is performed asynchronously and the aio_flush command must be\n" |
| " used to ensure all outstanding aio requests have been completed.\n" |
| " Note that due to its asynchronous nature, this command will be\n" |
| " considered successful once the request is submitted, independently\n" |
| " of potential I/O errors or pattern mismatches.\n" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -f, -- use Force Unit Access semantics\n" |
| " -i, -- treat request as invalid, for exercising stats\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| " -u, -- with -z, allow unmapping\n" |
| " -z, -- write zeroes using blk_aio_pwrite_zeroes\n" |
| "\n"); |
| } |
| |
| static int aio_write_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t aio_write_cmd = { |
| .name = "aio_write", |
| .cfunc = aio_write_f, |
| .perm = BLK_PERM_WRITE, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cfiquz] [-P pattern] off len [len..]", |
| .oneline = "asynchronously writes a number of bytes", |
| .help = aio_write_help, |
| }; |
| |
| static int aio_write_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int nr_iov, c; |
| int pattern = 0xcd; |
| struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| int flags = 0; |
| |
| ctx->blk = blk; |
| while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) { |
| switch (c) { |
| case 'C': |
| ctx->Cflag = true; |
| break; |
| case 'f': |
| flags |= BDRV_REQ_FUA; |
| break; |
| case 'q': |
| ctx->qflag = true; |
| break; |
| case 'u': |
| flags |= BDRV_REQ_MAY_UNMAP; |
| break; |
| case 'P': |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| g_free(ctx); |
| return -EINVAL; |
| } |
| break; |
| case 'i': |
| printf("injecting invalid write request\n"); |
| block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); |
| g_free(ctx); |
| return 0; |
| case 'z': |
| ctx->zflag = true; |
| break; |
| default: |
| g_free(ctx); |
| qemuio_command_usage(&aio_write_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind > argc - 2) { |
| g_free(ctx); |
| qemuio_command_usage(&aio_write_cmd); |
| return -EINVAL; |
| } |
| |
| if (ctx->zflag && optind != argc - 2) { |
| printf("-z supports only a single length parameter\n"); |
| g_free(ctx); |
| return -EINVAL; |
| } |
| |
| if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) { |
| printf("-u requires -z to be specified\n"); |
| g_free(ctx); |
| return -EINVAL; |
| } |
| |
| if (ctx->zflag && ctx->Pflag) { |
| printf("-z and -P cannot be specified at the same time\n"); |
| g_free(ctx); |
| return -EINVAL; |
| } |
| |
| ctx->offset = cvtnum(argv[optind]); |
| if (ctx->offset < 0) { |
| int ret = ctx->offset; |
| print_cvtnum_err(ret, argv[optind]); |
| g_free(ctx); |
| return ret; |
| } |
| optind++; |
| |
| if (ctx->zflag) { |
| int64_t count = cvtnum(argv[optind]); |
| if (count < 0) { |
| print_cvtnum_err(count, argv[optind]); |
| g_free(ctx); |
| return count; |
| } |
| |
| ctx->qiov.size = count; |
| blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done, |
| ctx); |
| } else { |
| nr_iov = argc - optind; |
| ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, |
| pattern); |
| if (ctx->buf == NULL) { |
| block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); |
| g_free(ctx); |
| return -EINVAL; |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &ctx->t1); |
| block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, |
| BLOCK_ACCT_WRITE); |
| |
| blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done, |
| ctx); |
| } |
| |
| return 0; |
| } |
| |
| static int aio_flush_f(BlockBackend *blk, int argc, char **argv) |
| { |
| BlockAcctCookie cookie; |
| block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH); |
| blk_drain_all(); |
| block_acct_done(blk_get_stats(blk), &cookie); |
| return 0; |
| } |
| |
| static const cmdinfo_t aio_flush_cmd = { |
| .name = "aio_flush", |
| .cfunc = aio_flush_f, |
| .oneline = "completes all outstanding aio requests" |
| }; |
| |
| static int flush_f(BlockBackend *blk, int argc, char **argv) |
| { |
| return blk_flush(blk); |
| } |
| |
| static const cmdinfo_t flush_cmd = { |
| .name = "flush", |
| .altname = "f", |
| .cfunc = flush_f, |
| .oneline = "flush all in-core file state to disk", |
| }; |
| |
| static int truncate_f(BlockBackend *blk, int argc, char **argv); |
| static const cmdinfo_t truncate_cmd = { |
| .name = "truncate", |
| .altname = "t", |
| .cfunc = truncate_f, |
| .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE, |
| .argmin = 1, |
| .argmax = 3, |
| .args = "[-m prealloc_mode] off", |
| .oneline = "truncates the current file at the given offset", |
| }; |
| |
| static int truncate_f(BlockBackend *blk, int argc, char **argv) |
| { |
| Error *local_err = NULL; |
| int64_t offset; |
| int c, ret; |
| PreallocMode prealloc = PREALLOC_MODE_OFF; |
| |
| while ((c = getopt(argc, argv, "m:")) != -1) { |
| switch (c) { |
| case 'm': |
| prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg, |
| PREALLOC_MODE__MAX, NULL); |
| if (prealloc == PREALLOC_MODE__MAX) { |
| error_report("Invalid preallocation mode '%s'", optarg); |
| return -EINVAL; |
| } |
| break; |
| default: |
| qemuio_command_usage(&truncate_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[1]); |
| return offset; |
| } |
| |
| /* |
| * qemu-io is a debugging tool, so let us be strict here and pass |
| * exact=true. It is better to err on the "emit more errors" side |
| * than to be overly permissive. |
| */ |
| ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err); |
| if (ret < 0) { |
| error_report_err(local_err); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int length_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int64_t size; |
| char s1[64]; |
| |
| size = blk_getlength(blk); |
| if (size < 0) { |
| printf("getlength: %s\n", strerror(-size)); |
| return size; |
| } |
| |
| cvtstr(size, s1, sizeof(s1)); |
| printf("%s\n", s1); |
| return 0; |
| } |
| |
| |
| static const cmdinfo_t length_cmd = { |
| .name = "length", |
| .altname = "l", |
| .cfunc = length_f, |
| .oneline = "gets the length of the current file", |
| }; |
| |
| |
| static int info_f(BlockBackend *blk, int argc, char **argv) |
| { |
| BlockDriverState *bs = blk_bs(blk); |
| BlockDriverInfo bdi; |
| ImageInfoSpecific *spec_info; |
| Error *local_err = NULL; |
| char s1[64], s2[64]; |
| int ret; |
| |
| if (bs->drv && bs->drv->format_name) { |
| printf("format name: %s\n", bs->drv->format_name); |
| } |
| if (bs->drv && bs->drv->protocol_name) { |
| printf("format name: %s\n", bs->drv->protocol_name); |
| } |
| |
| ret = bdrv_get_info(bs, &bdi); |
| if (ret) { |
| return ret; |
| } |
| |
| cvtstr(bdi.cluster_size, s1, sizeof(s1)); |
| cvtstr(bdi.vm_state_offset, s2, sizeof(s2)); |
| |
| printf("cluster size: %s\n", s1); |
| printf("vm state offset: %s\n", s2); |
| |
| spec_info = bdrv_get_specific_info(bs, &local_err); |
| if (local_err) { |
| error_report_err(local_err); |
| return -EIO; |
| } |
| if (spec_info) { |
| printf("Format specific information:\n"); |
| bdrv_image_info_specific_dump(spec_info); |
| qapi_free_ImageInfoSpecific(spec_info); |
| } |
| |
| return 0; |
| } |
| |
| |
| |
| static const cmdinfo_t info_cmd = { |
| .name = "info", |
| .altname = "i", |
| .cfunc = info_f, |
| .oneline = "prints information about the current file", |
| }; |
| |
| static void discard_help(void) |
| { |
| printf( |
| "\n" |
| " discards a range of bytes from the given offset\n" |
| "\n" |
| " Example:\n" |
| " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n" |
| "\n" |
| " Discards a segment of the currently open file.\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int discard_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t discard_cmd = { |
| .name = "discard", |
| .altname = "d", |
| .cfunc = discard_f, |
| .perm = BLK_PERM_WRITE, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cq] off len", |
| .oneline = "discards a number of bytes at a specified offset", |
| .help = discard_help, |
| }; |
| |
| static int discard_f(BlockBackend *blk, int argc, char **argv) |
| { |
| struct timespec t1, t2; |
| bool Cflag = false, qflag = false; |
| int c, ret; |
| int64_t offset, bytes; |
| |
| while ((c = getopt(argc, argv, "Cq")) != -1) { |
| switch (c) { |
| case 'C': |
| Cflag = true; |
| break; |
| case 'q': |
| qflag = true; |
| break; |
| default: |
| qemuio_command_usage(&discard_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind != argc - 2) { |
| qemuio_command_usage(&discard_cmd); |
| return -EINVAL; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[optind]); |
| return offset; |
| } |
| |
| optind++; |
| bytes = cvtnum(argv[optind]); |
| if (bytes < 0) { |
| print_cvtnum_err(bytes, argv[optind]); |
| return bytes; |
| } else if (bytes > BDRV_REQUEST_MAX_BYTES) { |
| printf("length cannot exceed %"PRIu64", given %s\n", |
| (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); |
| return -EINVAL; |
| } |
| |
| clock_gettime(CLOCK_MONOTONIC, &t1); |
| ret = blk_pdiscard(blk, offset, bytes); |
| clock_gettime(CLOCK_MONOTONIC, &t2); |
| |
| if (ret < 0) { |
| printf("discard failed: %s\n", strerror(-ret)); |
| return ret; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| if (!qflag) { |
| t2 = tsub(t2, t1); |
| print_report("discard", &t2, offset, bytes, bytes, 1, Cflag); |
| } |
| |
| return 0; |
| } |
| |
| static int alloc_f(BlockBackend *blk, int argc, char **argv) |
| { |
| BlockDriverState *bs = blk_bs(blk); |
| int64_t offset, start, remaining, count; |
| char s1[64]; |
| int ret; |
| int64_t num, sum_alloc; |
| |
| start = offset = cvtnum(argv[1]); |
| if (offset < 0) { |
| print_cvtnum_err(offset, argv[1]); |
| return offset; |
| } |
| |
| if (argc == 3) { |
| count = cvtnum(argv[2]); |
| if (count < 0) { |
| print_cvtnum_err(count, argv[2]); |
| return count; |
| } |
| } else { |
| count = BDRV_SECTOR_SIZE; |
| } |
| |
| remaining = count; |
| sum_alloc = 0; |
| while (remaining) { |
| ret = bdrv_is_allocated(bs, offset, remaining, &num); |
| if (ret < 0) { |
| printf("is_allocated failed: %s\n", strerror(-ret)); |
| return ret; |
| } |
| offset += num; |
| remaining -= num; |
| if (ret) { |
| sum_alloc += num; |
| } |
| if (num == 0) { |
| count -= remaining; |
| remaining = 0; |
| } |
| } |
| |
| cvtstr(start, s1, sizeof(s1)); |
| |
| printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n", |
| sum_alloc, count, s1); |
| return 0; |
| } |
| |
| static const cmdinfo_t alloc_cmd = { |
| .name = "alloc", |
| .altname = "a", |
| .argmin = 1, |
| .argmax = 2, |
| .cfunc = alloc_f, |
| .args = "offset [count]", |
| .oneline = "checks if offset is allocated in the file", |
| }; |
| |
| |
| static int map_is_allocated(BlockDriverState *bs, int64_t offset, |
| int64_t bytes, int64_t *pnum) |
| { |
| int64_t num; |
| int ret, firstret; |
| |
| ret = bdrv_is_allocated(bs, offset, bytes, &num); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| firstret = ret; |
| *pnum = num; |
| |
| while (bytes > 0 && ret == firstret) { |
| offset += num; |
| bytes -= num; |
| |
| ret = bdrv_is_allocated(bs, offset, bytes, &num); |
| if (ret == firstret && num) { |
| *pnum += num; |
| } else { |
| break; |
| } |
| } |
| |
| return firstret; |
| } |
| |
| static int map_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int64_t offset, bytes; |
| char s1[64], s2[64]; |
| int64_t num; |
| int ret; |
| const char *retstr; |
| |
| offset = 0; |
| bytes = blk_getlength(blk); |
| if (bytes < 0) { |
| error_report("Failed to query image length: %s", strerror(-bytes)); |
| return bytes; |
| } |
| |
| while (bytes) { |
| ret = map_is_allocated(blk_bs(blk), offset, bytes, &num); |
| if (ret < 0) { |
| error_report("Failed to get allocation status: %s", strerror(-ret)); |
| return ret; |
| } else if (!num) { |
| error_report("Unexpected end of image"); |
| return -EIO; |
| } |
| |
| retstr = ret ? " allocated" : "not allocated"; |
| cvtstr(num, s1, sizeof(s1)); |
| cvtstr(offset, s2, sizeof(s2)); |
| printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n", |
| s1, num, retstr, s2, offset); |
| |
| offset += num; |
| bytes -= num; |
| } |
| |
| return 0; |
| } |
| |
| static const cmdinfo_t map_cmd = { |
| .name = "map", |
| .argmin = 0, |
| .argmax = 0, |
| .cfunc = map_f, |
| .args = "", |
| .oneline = "prints the allocated areas of a file", |
| }; |
| |
| static void reopen_help(void) |
| { |
| printf( |
| "\n" |
| " Changes the open options of an already opened image\n" |
| "\n" |
| " Example:\n" |
| " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" |
| "\n" |
| " -r, -- Reopen the image read-only\n" |
| " -w, -- Reopen the image read-write\n" |
| " -c, -- Change the cache mode to the given value\n" |
| " -o, -- Changes block driver options (cf. 'open' command)\n" |
| "\n"); |
| } |
| |
| static int reopen_f(BlockBackend *blk, int argc, char **argv); |
| |
| static QemuOptsList reopen_opts = { |
| .name = "reopen", |
| .merge_lists = true, |
| .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), |
| .desc = { |
| /* no elements => accept any params */ |
| { /* end of list */ } |
| }, |
| }; |
| |
| static const cmdinfo_t reopen_cmd = { |
| .name = "reopen", |
| .argmin = 0, |
| .argmax = -1, |
| .cfunc = reopen_f, |
| .args = "[(-r|-w)] [-c cache] [-o options]", |
| .oneline = "reopens an image with new options", |
| .help = reopen_help, |
| }; |
| |
| static int reopen_f(BlockBackend *blk, int argc, char **argv) |
| { |
| BlockDriverState *bs = blk_bs(blk); |
| QemuOpts *qopts; |
| QDict *opts; |
| int c; |
| int flags = bs->open_flags; |
| bool writethrough = !blk_enable_write_cache(blk); |
| bool has_rw_option = false; |
| bool has_cache_option = false; |
| Error *local_err = NULL; |
| |
| while ((c = getopt(argc, argv, "c:o:rw")) != -1) { |
| switch (c) { |
| case 'c': |
| if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { |
| error_report("Invalid cache option: %s", optarg); |
| return -EINVAL; |
| } |
| has_cache_option = true; |
| break; |
| case 'o': |
| if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { |
| qemu_opts_reset(&reopen_opts); |
| return -EINVAL; |
| } |
| break; |
| case 'r': |
| if (has_rw_option) { |
| error_report("Only one -r/-w option may be given"); |
| return -EINVAL; |
| } |
| flags &= ~BDRV_O_RDWR; |
| has_rw_option = true; |
| break; |
| case 'w': |
| if (has_rw_option) { |
| error_report("Only one -r/-w option may be given"); |
| return -EINVAL; |
| } |
| flags |= BDRV_O_RDWR; |
| has_rw_option = true; |
| break; |
| default: |
| qemu_opts_reset(&reopen_opts); |
| qemuio_command_usage(&reopen_cmd); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind != argc) { |
| qemu_opts_reset(&reopen_opts); |
| qemuio_command_usage(&reopen_cmd); |
| return -EINVAL; |
| } |
| |
| if (!writethrough != blk_enable_write_cache(blk) && |
| blk_get_attached_dev(blk)) |
| { |
| error_report("Cannot change cache.writeback: Device attached"); |
| qemu_opts_reset(&reopen_opts); |
| return -EBUSY; |
| } |
| |
| if (!(flags & BDRV_O_RDWR)) { |
| uint64_t orig_perm, orig_shared_perm; |
| |
| bdrv_drain(bs); |
| |
| blk_get_perm(blk, &orig_perm, &orig_shared_perm); |
| blk_set_perm(blk, |
| orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED), |
| orig_shared_perm, |
| &error_abort); |
| } |
| |
| qopts = qemu_opts_find(&reopen_opts, NULL); |
| opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new(); |
| qemu_opts_reset(&reopen_opts); |
| |
| if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) { |
| if (has_rw_option) { |
| error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'"); |
| qobject_unref(opts); |
| return -EINVAL; |
| } |
| } else { |
| qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR)); |
| } |
| |
| if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) || |
| qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) { |
| if (has_cache_option) { |
| error_report("Cannot set both -c and the cache options"); |
| qobject_unref(opts); |
| return -EINVAL; |
| } |
| } else { |
| qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE); |
| qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH); |
| } |
| |
| bdrv_reopen(bs, opts, true, &local_err); |
| |
| if (local_err) { |
| error_report_err(local_err); |
| return -EINVAL; |
| } |
| |
| blk_set_enable_write_cache(blk, !writethrough); |
| return 0; |
| } |
| |
| static int break_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int ret; |
| |
| ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]); |
| if (ret < 0) { |
| printf("Could not set breakpoint: %s\n", strerror(-ret)); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int remove_break_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int ret; |
| |
| ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]); |
| if (ret < 0) { |
| printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret)); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static const cmdinfo_t break_cmd = { |
| .name = "break", |
| .argmin = 2, |
| .argmax = 2, |
| .cfunc = break_f, |
| .args = "event tag", |
| .oneline = "sets a breakpoint on event and tags the stopped " |
| "request as tag", |
| }; |
| |
| static const cmdinfo_t remove_break_cmd = { |
| .name = "remove_break", |
| .argmin = 1, |
| .argmax = 1, |
| .cfunc = remove_break_f, |
| .args = "tag", |
| .oneline = "remove a breakpoint by tag", |
| }; |
| |
| static int resume_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int ret; |
| |
| ret = bdrv_debug_resume(blk_bs(blk), argv[1]); |
| if (ret < 0) { |
| printf("Could not resume request: %s\n", strerror(-ret)); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static const cmdinfo_t resume_cmd = { |
| .name = "resume", |
| .argmin = 1, |
| .argmax = 1, |
| .cfunc = resume_f, |
| .args = "tag", |
| .oneline = "resumes the request tagged as tag", |
| }; |
| |
| static int wait_break_f(BlockBackend *blk, int argc, char **argv) |
| { |
| while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) { |
| aio_poll(blk_get_aio_context(blk), true); |
| } |
| return 0; |
| } |
| |
| static const cmdinfo_t wait_break_cmd = { |
| .name = "wait_break", |
| .argmin = 1, |
| .argmax = 1, |
| .cfunc = wait_break_f, |
| .args = "tag", |
| .oneline = "waits for the suspension of a request", |
| }; |
| |
| static int abort_f(BlockBackend *blk, int argc, char **argv) |
| { |
| abort(); |
| } |
| |
| static const cmdinfo_t abort_cmd = { |
| .name = "abort", |
| .cfunc = abort_f, |
| .flags = CMD_NOFILE_OK, |
| .oneline = "simulate a program crash using abort(3)", |
| }; |
| |
| static void sigraise_help(void) |
| { |
| printf( |
| "\n" |
| " raises the given signal\n" |
| "\n" |
| " Example:\n" |
| " 'sigraise %i' - raises SIGTERM\n" |
| "\n" |
| " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n" |
| " given to sigraise.\n" |
| "\n", SIGTERM); |
| } |
| |
| static int sigraise_f(BlockBackend *blk, int argc, char **argv); |
| |
| static const cmdinfo_t sigraise_cmd = { |
| .name = "sigraise", |
| .cfunc = sigraise_f, |
| .argmin = 1, |
| .argmax = 1, |
| .flags = CMD_NOFILE_OK, |
| .args = "signal", |
| .oneline = "raises a signal", |
| .help = sigraise_help, |
| }; |
| |
| static int sigraise_f(BlockBackend *blk, int argc, char **argv) |
| { |
| int64_t sig = cvtnum(argv[1]); |
| if (sig < 0) { |
| print_cvtnum_err(sig, argv[1]); |
| return sig; |
| } else if (sig > NSIG) { |
| printf("signal argument '%s' is too large to be a valid signal\n", |
| argv[1]); |
| return -EINVAL; |
| } |
| |
| /* Using raise() to kill this process does not necessarily flush all open |
| * streams. At least stdout and stderr (although the latter should be |
| * non-buffered anyway) should be flushed, though. */ |
| fflush(stdout); |
| fflush(stderr); |
| |
| raise(sig); |
| |
| return 0; |
| } |
| |
| static void sleep_cb(void *opaque) |
| { |
| bool *expired = opaque; |
| *expired = true; |
| } |
| |
| static int sleep_f(BlockBackend *blk, int argc, char **argv) |
| { |
| char *endptr; |
| long ms; |
| struct QEMUTimer *timer; |
| bool expired = false; |
| |
| ms = strtol(argv[1], &endptr, 0); |
| if (ms < 0 || *endptr != '\0') { |
| printf("%s is not a valid number\n", argv[1]); |
| return -EINVAL; |
| } |
| |
| timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired); |
| timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms); |
| |
| while (!expired) { |
| main_loop_wait(false); |
| } |
| |
| timer_free(timer); |
| return 0; |
| } |
| |
| static const cmdinfo_t sleep_cmd = { |
| .name = "sleep", |
| .argmin = 1, |
| .argmax = 1, |
| .cfunc = sleep_f, |
| .flags = CMD_NOFILE_OK, |
| .oneline = "waits for the given value in milliseconds", |
| }; |
| |
| static void help_oneline(const char *cmd, const cmdinfo_t *ct) |
| { |
| printf("%s ", cmd); |
| |
| if (ct->args) { |
| printf("%s ", ct->args); |
| } |
| printf("-- %s\n", ct->oneline); |
| } |
| |
| static void help_onecmd(const char *cmd, const cmdinfo_t *ct) |
| { |
| help_oneline(cmd, ct); |
| if (ct->help) { |
| ct->help(); |
| } |
| } |
| |
| static void help_all(void) |
| { |
| const cmdinfo_t *ct; |
| |
| for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { |
| help_oneline(ct->name, ct); |
| } |
| printf("\nUse 'help commandname' for extended help.\n"); |
| } |
| |
| static int help_f(BlockBackend *blk, int argc, char **argv) |
| { |
| const cmdinfo_t *ct; |
| |
| if (argc < 2) { |
| help_all(); |
| return 0; |
| } |
| |
| ct = find_command(argv[1]); |
| if (ct == NULL) { |
| printf("command %s not found\n", argv[1]); |
| return -EINVAL; |
| } |
| |
| help_onecmd(argv[1], ct); |
| return 0; |
| } |
| |
| static const cmdinfo_t help_cmd = { |
| .name = "help", |
| .altname = "?", |
| .cfunc = help_f, |
| .argmin = 0, |
| .argmax = 1, |
| .flags = CMD_FLAG_GLOBAL, |
| .args = "[command]", |
| .oneline = "help for one or all commands", |
| }; |
| |
| /* |
| * Called with aio context of blk acquired. Or with qemu_get_aio_context() |
| * context acquired if blk is NULL. |
| */ |
| int qemuio_command(BlockBackend *blk, const char *cmd) |
| { |
| char *input; |
| const cmdinfo_t *ct; |
| char **v; |
| int c; |
| int ret = 0; |
| |
| input = g_strdup(cmd); |
| v = breakline(input, &c); |
| if (c) { |
| ct = find_command(v[0]); |
| if (ct) { |
| ret = command(blk, ct, c, v); |
| } else { |
| fprintf(stderr, "command \"%s\" not found\n", v[0]); |
| ret = -EINVAL; |
| } |
| } |
| g_free(input); |
| g_free(v); |
| |
| return ret; |
| } |
| |
| static void __attribute((constructor)) init_qemuio_commands(void) |
| { |
| /* initialize commands */ |
| qemuio_add_command(&help_cmd); |
| qemuio_add_command(&read_cmd); |
| qemuio_add_command(&readv_cmd); |
| qemuio_add_command(&write_cmd); |
| qemuio_add_command(&writev_cmd); |
| qemuio_add_command(&aio_read_cmd); |
| qemuio_add_command(&aio_write_cmd); |
| qemuio_add_command(&aio_flush_cmd); |
| qemuio_add_command(&flush_cmd); |
| qemuio_add_command(&truncate_cmd); |
| qemuio_add_command(&length_cmd); |
| qemuio_add_command(&info_cmd); |
| qemuio_add_command(&discard_cmd); |
| qemuio_add_command(&alloc_cmd); |
| qemuio_add_command(&map_cmd); |
| qemuio_add_command(&reopen_cmd); |
| qemuio_add_command(&break_cmd); |
| qemuio_add_command(&remove_break_cmd); |
| qemuio_add_command(&resume_cmd); |
| qemuio_add_command(&wait_break_cmd); |
| qemuio_add_command(&abort_cmd); |
| qemuio_add_command(&sleep_cmd); |
| qemuio_add_command(&sigraise_cmd); |
| } |