root / qemu-io-cmds.c @ 6a1751b7
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| 1 |
/*
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|---|---|
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* Command line utility to exercise the QEMU I/O path.
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*
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* Copyright (C) 2009 Red Hat, Inc.
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* Copyright (c) 2003-2005 Silicon Graphics, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu-io.h" |
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#include "block/block_int.h" |
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#include "qemu/main-loop.h" |
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|
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#define CMD_NOFILE_OK 0x01 |
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|
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int qemuio_misalign;
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|
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static cmdinfo_t *cmdtab;
|
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static int ncmds; |
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|
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static int compare_cmdname(const void *a, const void *b) |
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{
|
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return strcmp(((const cmdinfo_t *)a)->name, |
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((const cmdinfo_t *)b)->name);
|
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} |
| 27 |
|
| 28 |
void qemuio_add_command(const cmdinfo_t *ci) |
| 29 |
{
|
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cmdtab = g_realloc(cmdtab, ++ncmds * sizeof(*cmdtab));
|
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cmdtab[ncmds - 1] = *ci;
|
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qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
|
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} |
| 34 |
|
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int qemuio_command_usage(const cmdinfo_t *ci) |
| 36 |
{
|
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printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
|
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return 0; |
| 39 |
} |
| 40 |
|
| 41 |
static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct) |
| 42 |
{
|
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if (ct->flags & CMD_FLAG_GLOBAL) {
|
| 44 |
return 1; |
| 45 |
} |
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if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
|
| 47 |
fprintf(stderr, "no file open, try 'help open'\n");
|
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return 0; |
| 49 |
} |
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return 1; |
| 51 |
} |
| 52 |
|
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static int command(BlockDriverState *bs, const cmdinfo_t *ct, int argc, |
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char **argv)
|
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{
|
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char *cmd = argv[0]; |
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|
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if (!init_check_command(bs, ct)) {
|
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return 0; |
| 60 |
} |
| 61 |
|
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if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { |
| 63 |
if (ct->argmax == -1) { |
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fprintf(stderr, |
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"bad argument count %d to %s, expected at least %d arguments\n",
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argc-1, cmd, ct->argmin);
|
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} else if (ct->argmin == ct->argmax) { |
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fprintf(stderr, |
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"bad argument count %d to %s, expected %d arguments\n",
|
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argc-1, cmd, ct->argmin);
|
| 71 |
} else {
|
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fprintf(stderr, |
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"bad argument count %d to %s, expected between %d and %d arguments\n",
|
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argc-1, cmd, ct->argmin, ct->argmax);
|
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} |
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return 0; |
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} |
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optind = 0;
|
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return ct->cfunc(bs, argc, argv);
|
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} |
| 81 |
|
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static const cmdinfo_t *find_command(const char *cmd) |
| 83 |
{
|
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cmdinfo_t *ct; |
| 85 |
|
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for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
|
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if (strcmp(ct->name, cmd) == 0 || |
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(ct->altname && strcmp(ct->altname, cmd) == 0))
|
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{
|
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return (const cmdinfo_t *)ct; |
| 91 |
} |
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} |
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return NULL; |
| 94 |
} |
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|
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static char **breakline(char *input, int *count) |
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{
|
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int c = 0; |
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char *p;
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char **rval = g_malloc0(sizeof(char *)); |
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char **tmp;
|
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|
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while (rval && (p = qemu_strsep(&input, " ")) != NULL) { |
| 104 |
if (!*p) {
|
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continue;
|
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} |
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c++; |
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tmp = g_realloc(rval, sizeof(*rval) * (c + 1)); |
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if (!tmp) {
|
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g_free(rval); |
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rval = NULL;
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c = 0;
|
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break;
|
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} else {
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rval = tmp; |
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} |
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rval[c - 1] = p;
|
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rval[c] = NULL;
|
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} |
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*count = c; |
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return rval;
|
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} |
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|
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static int64_t cvtnum(const char *s) |
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{
|
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char *end;
|
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return strtosz_suffix(s, &end, STRTOSZ_DEFSUFFIX_B);
|
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} |
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|
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#define EXABYTES(x) ((long long)(x) << 60) |
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#define PETABYTES(x) ((long long)(x) << 50) |
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#define TERABYTES(x) ((long long)(x) << 40) |
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#define GIGABYTES(x) ((long long)(x) << 30) |
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#define MEGABYTES(x) ((long long)(x) << 20) |
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#define KILOBYTES(x) ((long long)(x) << 10) |
| 136 |
|
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#define TO_EXABYTES(x) ((x) / EXABYTES(1)) |
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#define TO_PETABYTES(x) ((x) / PETABYTES(1)) |
| 139 |
#define TO_TERABYTES(x) ((x) / TERABYTES(1)) |
| 140 |
#define TO_GIGABYTES(x) ((x) / GIGABYTES(1)) |
| 141 |
#define TO_MEGABYTES(x) ((x) / MEGABYTES(1)) |
| 142 |
#define TO_KILOBYTES(x) ((x) / KILOBYTES(1)) |
| 143 |
|
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static void cvtstr(double value, char *str, size_t size) |
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{
|
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char *trim;
|
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const char *suffix; |
| 148 |
|
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if (value >= EXABYTES(1)) { |
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suffix = " EiB";
|
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snprintf(str, size - 4, "%.3f", TO_EXABYTES(value)); |
| 152 |
} else if (value >= PETABYTES(1)) { |
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suffix = " PiB";
|
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snprintf(str, size - 4, "%.3f", TO_PETABYTES(value)); |
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} else if (value >= TERABYTES(1)) { |
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suffix = " TiB";
|
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snprintf(str, size - 4, "%.3f", TO_TERABYTES(value)); |
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} else if (value >= GIGABYTES(1)) { |
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suffix = " GiB";
|
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snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value)); |
| 161 |
} else if (value >= MEGABYTES(1)) { |
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suffix = " MiB";
|
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snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value)); |
| 164 |
} else if (value >= KILOBYTES(1)) { |
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suffix = " KiB";
|
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snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value)); |
| 167 |
} else {
|
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suffix = " bytes";
|
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snprintf(str, size - 6, "%f", value); |
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} |
| 171 |
|
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trim = strstr(str, ".000");
|
| 173 |
if (trim) {
|
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strcpy(trim, suffix); |
| 175 |
} else {
|
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strcat(str, suffix); |
| 177 |
} |
| 178 |
} |
| 179 |
|
| 180 |
|
| 181 |
|
| 182 |
static struct timeval tsub(struct timeval t1, struct timeval t2) |
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{
|
| 184 |
t1.tv_usec -= t2.tv_usec; |
| 185 |
if (t1.tv_usec < 0) { |
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t1.tv_usec += 1000000;
|
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t1.tv_sec--; |
| 188 |
} |
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t1.tv_sec -= t2.tv_sec; |
| 190 |
return t1;
|
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} |
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|
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static double tdiv(double value, struct timeval tv) |
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{
|
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return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0)); |
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} |
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|
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#define HOURS(sec) ((sec) / (60 * 60)) |
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#define MINUTES(sec) (((sec) % (60 * 60)) / 60) |
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#define SECONDS(sec) ((sec) % 60) |
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|
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enum {
|
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DEFAULT_TIME = 0x0,
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TERSE_FIXED_TIME = 0x1,
|
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VERBOSE_FIXED_TIME = 0x2,
|
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}; |
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|
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static void timestr(struct timeval *tv, char *ts, size_t size, int format) |
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{
|
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double usec = (double)tv->tv_usec / 1000000.0; |
| 211 |
|
| 212 |
if (format & TERSE_FIXED_TIME) {
|
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if (!HOURS(tv->tv_sec)) {
|
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snprintf(ts, size, "%u:%02u.%02u",
|
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(unsigned int) MINUTES(tv->tv_sec), |
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(unsigned int) SECONDS(tv->tv_sec), |
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(unsigned int) (usec * 100)); |
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return;
|
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} |
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format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
|
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} |
| 222 |
|
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if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
|
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snprintf(ts, size, "%u:%02u:%02u.%02u",
|
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(unsigned int) HOURS(tv->tv_sec), |
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(unsigned int) MINUTES(tv->tv_sec), |
| 227 |
(unsigned int) SECONDS(tv->tv_sec), |
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(unsigned int) (usec * 100)); |
| 229 |
} else {
|
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snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000)); |
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} |
| 232 |
} |
| 233 |
|
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/*
|
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* Parse the pattern argument to various sub-commands.
|
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*
|
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* Because the pattern is used as an argument to memset it must evaluate
|
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* to an unsigned integer that fits into a single byte.
|
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*/
|
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static int parse_pattern(const char *arg) |
| 241 |
{
|
| 242 |
char *endptr = NULL; |
| 243 |
long pattern;
|
| 244 |
|
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pattern = strtol(arg, &endptr, 0);
|
| 246 |
if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') { |
| 247 |
printf("%s is not a valid pattern byte\n", arg);
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return -1; |
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} |
| 250 |
|
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return pattern;
|
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} |
| 253 |
|
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/*
|
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* Memory allocation helpers.
|
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*
|
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* Make sure memory is aligned by default, or purposefully misaligned if
|
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* that is specified on the command line.
|
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*/
|
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|
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#define MISALIGN_OFFSET 16 |
| 262 |
static void *qemu_io_alloc(BlockDriverState *bs, size_t len, int pattern) |
| 263 |
{
|
| 264 |
void *buf;
|
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|
| 266 |
if (qemuio_misalign) {
|
| 267 |
len += MISALIGN_OFFSET; |
| 268 |
} |
| 269 |
buf = qemu_blockalign(bs, len); |
| 270 |
memset(buf, pattern, len); |
| 271 |
if (qemuio_misalign) {
|
| 272 |
buf += MISALIGN_OFFSET; |
| 273 |
} |
| 274 |
return buf;
|
| 275 |
} |
| 276 |
|
| 277 |
static void qemu_io_free(void *p) |
| 278 |
{
|
| 279 |
if (qemuio_misalign) {
|
| 280 |
p -= MISALIGN_OFFSET; |
| 281 |
} |
| 282 |
qemu_vfree(p); |
| 283 |
} |
| 284 |
|
| 285 |
static void dump_buffer(const void *buffer, int64_t offset, int len) |
| 286 |
{
|
| 287 |
int i, j;
|
| 288 |
const uint8_t *p;
|
| 289 |
|
| 290 |
for (i = 0, p = buffer; i < len; i += 16) { |
| 291 |
const uint8_t *s = p;
|
| 292 |
|
| 293 |
printf("%08" PRIx64 ": ", offset + i); |
| 294 |
for (j = 0; j < 16 && i + j < len; j++, p++) { |
| 295 |
printf("%02x ", *p);
|
| 296 |
} |
| 297 |
printf(" ");
|
| 298 |
for (j = 0; j < 16 && i + j < len; j++, s++) { |
| 299 |
if (isalnum(*s)) {
|
| 300 |
printf("%c", *s);
|
| 301 |
} else {
|
| 302 |
printf(".");
|
| 303 |
} |
| 304 |
} |
| 305 |
printf("\n");
|
| 306 |
} |
| 307 |
} |
| 308 |
|
| 309 |
static void print_report(const char *op, struct timeval *t, int64_t offset, |
| 310 |
int count, int total, int cnt, int Cflag) |
| 311 |
{
|
| 312 |
char s1[64], s2[64], ts[64]; |
| 313 |
|
| 314 |
timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); |
| 315 |
if (!Cflag) {
|
| 316 |
cvtstr((double)total, s1, sizeof(s1)); |
| 317 |
cvtstr(tdiv((double)total, *t), s2, sizeof(s2)); |
| 318 |
printf("%s %d/%d bytes at offset %" PRId64 "\n", |
| 319 |
op, total, count, offset); |
| 320 |
printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
|
| 321 |
s1, cnt, ts, s2, tdiv((double)cnt, *t));
|
| 322 |
} else {/* bytes,ops,time,bytes/sec,ops/sec */ |
| 323 |
printf("%d,%d,%s,%.3f,%.3f\n",
|
| 324 |
total, cnt, ts, |
| 325 |
tdiv((double)total, *t),
|
| 326 |
tdiv((double)cnt, *t));
|
| 327 |
} |
| 328 |
} |
| 329 |
|
| 330 |
/*
|
| 331 |
* Parse multiple length statements for vectored I/O, and construct an I/O
|
| 332 |
* vector matching it.
|
| 333 |
*/
|
| 334 |
static void * |
| 335 |
create_iovec(BlockDriverState *bs, QEMUIOVector *qiov, char **argv, int nr_iov, |
| 336 |
int pattern)
|
| 337 |
{
|
| 338 |
size_t *sizes = g_new0(size_t, nr_iov); |
| 339 |
size_t count = 0;
|
| 340 |
void *buf = NULL; |
| 341 |
void *p;
|
| 342 |
int i;
|
| 343 |
|
| 344 |
for (i = 0; i < nr_iov; i++) { |
| 345 |
char *arg = argv[i];
|
| 346 |
int64_t len; |
| 347 |
|
| 348 |
len = cvtnum(arg); |
| 349 |
if (len < 0) { |
| 350 |
printf("non-numeric length argument -- %s\n", arg);
|
| 351 |
goto fail;
|
| 352 |
} |
| 353 |
|
| 354 |
/* should be SIZE_T_MAX, but that doesn't exist */
|
| 355 |
if (len > INT_MAX) {
|
| 356 |
printf("too large length argument -- %s\n", arg);
|
| 357 |
goto fail;
|
| 358 |
} |
| 359 |
|
| 360 |
if (len & 0x1ff) { |
| 361 |
printf("length argument %" PRId64
|
| 362 |
" is not sector aligned\n", len);
|
| 363 |
goto fail;
|
| 364 |
} |
| 365 |
|
| 366 |
sizes[i] = len; |
| 367 |
count += len; |
| 368 |
} |
| 369 |
|
| 370 |
qemu_iovec_init(qiov, nr_iov); |
| 371 |
|
| 372 |
buf = p = qemu_io_alloc(bs, count, pattern); |
| 373 |
|
| 374 |
for (i = 0; i < nr_iov; i++) { |
| 375 |
qemu_iovec_add(qiov, p, sizes[i]); |
| 376 |
p += sizes[i]; |
| 377 |
} |
| 378 |
|
| 379 |
fail:
|
| 380 |
g_free(sizes); |
| 381 |
return buf;
|
| 382 |
} |
| 383 |
|
| 384 |
static int do_read(BlockDriverState *bs, char *buf, int64_t offset, int count, |
| 385 |
int *total)
|
| 386 |
{
|
| 387 |
int ret;
|
| 388 |
|
| 389 |
ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| 390 |
if (ret < 0) { |
| 391 |
return ret;
|
| 392 |
} |
| 393 |
*total = count; |
| 394 |
return 1; |
| 395 |
} |
| 396 |
|
| 397 |
static int do_write(BlockDriverState *bs, char *buf, int64_t offset, int count, |
| 398 |
int *total)
|
| 399 |
{
|
| 400 |
int ret;
|
| 401 |
|
| 402 |
ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| 403 |
if (ret < 0) { |
| 404 |
return ret;
|
| 405 |
} |
| 406 |
*total = count; |
| 407 |
return 1; |
| 408 |
} |
| 409 |
|
| 410 |
static int do_pread(BlockDriverState *bs, char *buf, int64_t offset, int count, |
| 411 |
int *total)
|
| 412 |
{
|
| 413 |
*total = bdrv_pread(bs, offset, (uint8_t *)buf, count); |
| 414 |
if (*total < 0) { |
| 415 |
return *total;
|
| 416 |
} |
| 417 |
return 1; |
| 418 |
} |
| 419 |
|
| 420 |
static int do_pwrite(BlockDriverState *bs, char *buf, int64_t offset, int count, |
| 421 |
int *total)
|
| 422 |
{
|
| 423 |
*total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count); |
| 424 |
if (*total < 0) { |
| 425 |
return *total;
|
| 426 |
} |
| 427 |
return 1; |
| 428 |
} |
| 429 |
|
| 430 |
typedef struct { |
| 431 |
BlockDriverState *bs; |
| 432 |
int64_t offset; |
| 433 |
int count;
|
| 434 |
int *total;
|
| 435 |
int ret;
|
| 436 |
bool done;
|
| 437 |
} CoWriteZeroes; |
| 438 |
|
| 439 |
static void coroutine_fn co_write_zeroes_entry(void *opaque) |
| 440 |
{
|
| 441 |
CoWriteZeroes *data = opaque; |
| 442 |
|
| 443 |
data->ret = bdrv_co_write_zeroes(data->bs, data->offset / BDRV_SECTOR_SIZE, |
| 444 |
data->count / BDRV_SECTOR_SIZE); |
| 445 |
data->done = true;
|
| 446 |
if (data->ret < 0) { |
| 447 |
*data->total = data->ret; |
| 448 |
return;
|
| 449 |
} |
| 450 |
|
| 451 |
*data->total = data->count; |
| 452 |
} |
| 453 |
|
| 454 |
static int do_co_write_zeroes(BlockDriverState *bs, int64_t offset, int count, |
| 455 |
int *total)
|
| 456 |
{
|
| 457 |
Coroutine *co; |
| 458 |
CoWriteZeroes data = {
|
| 459 |
.bs = bs, |
| 460 |
.offset = offset, |
| 461 |
.count = count, |
| 462 |
.total = total, |
| 463 |
.done = false,
|
| 464 |
}; |
| 465 |
|
| 466 |
co = qemu_coroutine_create(co_write_zeroes_entry); |
| 467 |
qemu_coroutine_enter(co, &data); |
| 468 |
while (!data.done) {
|
| 469 |
qemu_aio_wait(); |
| 470 |
} |
| 471 |
if (data.ret < 0) { |
| 472 |
return data.ret;
|
| 473 |
} else {
|
| 474 |
return 1; |
| 475 |
} |
| 476 |
} |
| 477 |
|
| 478 |
static int do_write_compressed(BlockDriverState *bs, char *buf, int64_t offset, |
| 479 |
int count, int *total) |
| 480 |
{
|
| 481 |
int ret;
|
| 482 |
|
| 483 |
ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| 484 |
if (ret < 0) { |
| 485 |
return ret;
|
| 486 |
} |
| 487 |
*total = count; |
| 488 |
return 1; |
| 489 |
} |
| 490 |
|
| 491 |
static int do_load_vmstate(BlockDriverState *bs, char *buf, int64_t offset, |
| 492 |
int count, int *total) |
| 493 |
{
|
| 494 |
*total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count); |
| 495 |
if (*total < 0) { |
| 496 |
return *total;
|
| 497 |
} |
| 498 |
return 1; |
| 499 |
} |
| 500 |
|
| 501 |
static int do_save_vmstate(BlockDriverState *bs, char *buf, int64_t offset, |
| 502 |
int count, int *total) |
| 503 |
{
|
| 504 |
*total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count); |
| 505 |
if (*total < 0) { |
| 506 |
return *total;
|
| 507 |
} |
| 508 |
return 1; |
| 509 |
} |
| 510 |
|
| 511 |
#define NOT_DONE 0x7fffffff |
| 512 |
static void aio_rw_done(void *opaque, int ret) |
| 513 |
{
|
| 514 |
*(int *)opaque = ret;
|
| 515 |
} |
| 516 |
|
| 517 |
static int do_aio_readv(BlockDriverState *bs, QEMUIOVector *qiov, |
| 518 |
int64_t offset, int *total)
|
| 519 |
{
|
| 520 |
int async_ret = NOT_DONE;
|
| 521 |
|
| 522 |
bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9, |
| 523 |
aio_rw_done, &async_ret); |
| 524 |
while (async_ret == NOT_DONE) {
|
| 525 |
main_loop_wait(false);
|
| 526 |
} |
| 527 |
|
| 528 |
*total = qiov->size; |
| 529 |
return async_ret < 0 ? async_ret : 1; |
| 530 |
} |
| 531 |
|
| 532 |
static int do_aio_writev(BlockDriverState *bs, QEMUIOVector *qiov, |
| 533 |
int64_t offset, int *total)
|
| 534 |
{
|
| 535 |
int async_ret = NOT_DONE;
|
| 536 |
|
| 537 |
bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9, |
| 538 |
aio_rw_done, &async_ret); |
| 539 |
while (async_ret == NOT_DONE) {
|
| 540 |
main_loop_wait(false);
|
| 541 |
} |
| 542 |
|
| 543 |
*total = qiov->size; |
| 544 |
return async_ret < 0 ? async_ret : 1; |
| 545 |
} |
| 546 |
|
| 547 |
struct multiwrite_async_ret {
|
| 548 |
int num_done;
|
| 549 |
int error;
|
| 550 |
}; |
| 551 |
|
| 552 |
static void multiwrite_cb(void *opaque, int ret) |
| 553 |
{
|
| 554 |
struct multiwrite_async_ret *async_ret = opaque;
|
| 555 |
|
| 556 |
async_ret->num_done++; |
| 557 |
if (ret < 0) { |
| 558 |
async_ret->error = ret; |
| 559 |
} |
| 560 |
} |
| 561 |
|
| 562 |
static int do_aio_multiwrite(BlockDriverState *bs, BlockRequest* reqs, |
| 563 |
int num_reqs, int *total) |
| 564 |
{
|
| 565 |
int i, ret;
|
| 566 |
struct multiwrite_async_ret async_ret = {
|
| 567 |
.num_done = 0,
|
| 568 |
.error = 0,
|
| 569 |
}; |
| 570 |
|
| 571 |
*total = 0;
|
| 572 |
for (i = 0; i < num_reqs; i++) { |
| 573 |
reqs[i].cb = multiwrite_cb; |
| 574 |
reqs[i].opaque = &async_ret; |
| 575 |
*total += reqs[i].qiov->size; |
| 576 |
} |
| 577 |
|
| 578 |
ret = bdrv_aio_multiwrite(bs, reqs, num_reqs); |
| 579 |
if (ret < 0) { |
| 580 |
return ret;
|
| 581 |
} |
| 582 |
|
| 583 |
while (async_ret.num_done < num_reqs) {
|
| 584 |
main_loop_wait(false);
|
| 585 |
} |
| 586 |
|
| 587 |
return async_ret.error < 0 ? async_ret.error : 1; |
| 588 |
} |
| 589 |
|
| 590 |
static void read_help(void) |
| 591 |
{
|
| 592 |
printf( |
| 593 |
"\n"
|
| 594 |
" reads a range of bytes from the given offset\n"
|
| 595 |
"\n"
|
| 596 |
" Example:\n"
|
| 597 |
" 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
|
| 598 |
"\n"
|
| 599 |
" Reads a segment of the currently open file, optionally dumping it to the\n"
|
| 600 |
" standard output stream (with -v option) for subsequent inspection.\n"
|
| 601 |
" -b, -- read from the VM state rather than the virtual disk\n"
|
| 602 |
" -C, -- report statistics in a machine parsable format\n"
|
| 603 |
" -l, -- length for pattern verification (only with -P)\n"
|
| 604 |
" -p, -- use bdrv_pread to read the file\n"
|
| 605 |
" -P, -- use a pattern to verify read data\n"
|
| 606 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 607 |
" -s, -- start offset for pattern verification (only with -P)\n"
|
| 608 |
" -v, -- dump buffer to standard output\n"
|
| 609 |
"\n");
|
| 610 |
} |
| 611 |
|
| 612 |
static int read_f(BlockDriverState *bs, int argc, char **argv); |
| 613 |
|
| 614 |
static const cmdinfo_t read_cmd = { |
| 615 |
.name = "read",
|
| 616 |
.altname = "r",
|
| 617 |
.cfunc = read_f, |
| 618 |
.argmin = 2,
|
| 619 |
.argmax = -1,
|
| 620 |
.args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
|
| 621 |
.oneline = "reads a number of bytes at a specified offset",
|
| 622 |
.help = read_help, |
| 623 |
}; |
| 624 |
|
| 625 |
static int read_f(BlockDriverState *bs, int argc, char **argv) |
| 626 |
{
|
| 627 |
struct timeval t1, t2;
|
| 628 |
int Cflag = 0, pflag = 0, qflag = 0, vflag = 0; |
| 629 |
int Pflag = 0, sflag = 0, lflag = 0, bflag = 0; |
| 630 |
int c, cnt;
|
| 631 |
char *buf;
|
| 632 |
int64_t offset; |
| 633 |
int count;
|
| 634 |
/* Some compilers get confused and warn if this is not initialized. */
|
| 635 |
int total = 0; |
| 636 |
int pattern = 0, pattern_offset = 0, pattern_count = 0; |
| 637 |
|
| 638 |
while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) { |
| 639 |
switch (c) {
|
| 640 |
case 'b': |
| 641 |
bflag = 1;
|
| 642 |
break;
|
| 643 |
case 'C': |
| 644 |
Cflag = 1;
|
| 645 |
break;
|
| 646 |
case 'l': |
| 647 |
lflag = 1;
|
| 648 |
pattern_count = cvtnum(optarg); |
| 649 |
if (pattern_count < 0) { |
| 650 |
printf("non-numeric length argument -- %s\n", optarg);
|
| 651 |
return 0; |
| 652 |
} |
| 653 |
break;
|
| 654 |
case 'p': |
| 655 |
pflag = 1;
|
| 656 |
break;
|
| 657 |
case 'P': |
| 658 |
Pflag = 1;
|
| 659 |
pattern = parse_pattern(optarg); |
| 660 |
if (pattern < 0) { |
| 661 |
return 0; |
| 662 |
} |
| 663 |
break;
|
| 664 |
case 'q': |
| 665 |
qflag = 1;
|
| 666 |
break;
|
| 667 |
case 's': |
| 668 |
sflag = 1;
|
| 669 |
pattern_offset = cvtnum(optarg); |
| 670 |
if (pattern_offset < 0) { |
| 671 |
printf("non-numeric length argument -- %s\n", optarg);
|
| 672 |
return 0; |
| 673 |
} |
| 674 |
break;
|
| 675 |
case 'v': |
| 676 |
vflag = 1;
|
| 677 |
break;
|
| 678 |
default:
|
| 679 |
return qemuio_command_usage(&read_cmd);
|
| 680 |
} |
| 681 |
} |
| 682 |
|
| 683 |
if (optind != argc - 2) { |
| 684 |
return qemuio_command_usage(&read_cmd);
|
| 685 |
} |
| 686 |
|
| 687 |
if (bflag && pflag) {
|
| 688 |
printf("-b and -p cannot be specified at the same time\n");
|
| 689 |
return 0; |
| 690 |
} |
| 691 |
|
| 692 |
offset = cvtnum(argv[optind]); |
| 693 |
if (offset < 0) { |
| 694 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 695 |
return 0; |
| 696 |
} |
| 697 |
|
| 698 |
optind++; |
| 699 |
count = cvtnum(argv[optind]); |
| 700 |
if (count < 0) { |
| 701 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 702 |
return 0; |
| 703 |
} |
| 704 |
|
| 705 |
if (!Pflag && (lflag || sflag)) {
|
| 706 |
return qemuio_command_usage(&read_cmd);
|
| 707 |
} |
| 708 |
|
| 709 |
if (!lflag) {
|
| 710 |
pattern_count = count - pattern_offset; |
| 711 |
} |
| 712 |
|
| 713 |
if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { |
| 714 |
printf("pattern verification range exceeds end of read data\n");
|
| 715 |
return 0; |
| 716 |
} |
| 717 |
|
| 718 |
if (!pflag) {
|
| 719 |
if (offset & 0x1ff) { |
| 720 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 721 |
offset); |
| 722 |
return 0; |
| 723 |
} |
| 724 |
if (count & 0x1ff) { |
| 725 |
printf("count %d is not sector aligned\n",
|
| 726 |
count); |
| 727 |
return 0; |
| 728 |
} |
| 729 |
} |
| 730 |
|
| 731 |
buf = qemu_io_alloc(bs, count, 0xab);
|
| 732 |
|
| 733 |
gettimeofday(&t1, NULL);
|
| 734 |
if (pflag) {
|
| 735 |
cnt = do_pread(bs, buf, offset, count, &total); |
| 736 |
} else if (bflag) { |
| 737 |
cnt = do_load_vmstate(bs, buf, offset, count, &total); |
| 738 |
} else {
|
| 739 |
cnt = do_read(bs, buf, offset, count, &total); |
| 740 |
} |
| 741 |
gettimeofday(&t2, NULL);
|
| 742 |
|
| 743 |
if (cnt < 0) { |
| 744 |
printf("read failed: %s\n", strerror(-cnt));
|
| 745 |
goto out;
|
| 746 |
} |
| 747 |
|
| 748 |
if (Pflag) {
|
| 749 |
void *cmp_buf = g_malloc(pattern_count);
|
| 750 |
memset(cmp_buf, pattern, pattern_count); |
| 751 |
if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
|
| 752 |
printf("Pattern verification failed at offset %"
|
| 753 |
PRId64 ", %d bytes\n",
|
| 754 |
offset + pattern_offset, pattern_count); |
| 755 |
} |
| 756 |
g_free(cmp_buf); |
| 757 |
} |
| 758 |
|
| 759 |
if (qflag) {
|
| 760 |
goto out;
|
| 761 |
} |
| 762 |
|
| 763 |
if (vflag) {
|
| 764 |
dump_buffer(buf, offset, count); |
| 765 |
} |
| 766 |
|
| 767 |
/* Finally, report back -- -C gives a parsable format */
|
| 768 |
t2 = tsub(t2, t1); |
| 769 |
print_report("read", &t2, offset, count, total, cnt, Cflag);
|
| 770 |
|
| 771 |
out:
|
| 772 |
qemu_io_free(buf); |
| 773 |
|
| 774 |
return 0; |
| 775 |
} |
| 776 |
|
| 777 |
static void readv_help(void) |
| 778 |
{
|
| 779 |
printf( |
| 780 |
"\n"
|
| 781 |
" reads a range of bytes from the given offset into multiple buffers\n"
|
| 782 |
"\n"
|
| 783 |
" Example:\n"
|
| 784 |
" 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
|
| 785 |
"\n"
|
| 786 |
" Reads a segment of the currently open file, optionally dumping it to the\n"
|
| 787 |
" standard output stream (with -v option) for subsequent inspection.\n"
|
| 788 |
" Uses multiple iovec buffers if more than one byte range is specified.\n"
|
| 789 |
" -C, -- report statistics in a machine parsable format\n"
|
| 790 |
" -P, -- use a pattern to verify read data\n"
|
| 791 |
" -v, -- dump buffer to standard output\n"
|
| 792 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 793 |
"\n");
|
| 794 |
} |
| 795 |
|
| 796 |
static int readv_f(BlockDriverState *bs, int argc, char **argv); |
| 797 |
|
| 798 |
static const cmdinfo_t readv_cmd = { |
| 799 |
.name = "readv",
|
| 800 |
.cfunc = readv_f, |
| 801 |
.argmin = 2,
|
| 802 |
.argmax = -1,
|
| 803 |
.args = "[-Cqv] [-P pattern ] off len [len..]",
|
| 804 |
.oneline = "reads a number of bytes at a specified offset",
|
| 805 |
.help = readv_help, |
| 806 |
}; |
| 807 |
|
| 808 |
static int readv_f(BlockDriverState *bs, int argc, char **argv) |
| 809 |
{
|
| 810 |
struct timeval t1, t2;
|
| 811 |
int Cflag = 0, qflag = 0, vflag = 0; |
| 812 |
int c, cnt;
|
| 813 |
char *buf;
|
| 814 |
int64_t offset; |
| 815 |
/* Some compilers get confused and warn if this is not initialized. */
|
| 816 |
int total = 0; |
| 817 |
int nr_iov;
|
| 818 |
QEMUIOVector qiov; |
| 819 |
int pattern = 0; |
| 820 |
int Pflag = 0; |
| 821 |
|
| 822 |
while ((c = getopt(argc, argv, "CP:qv")) != EOF) { |
| 823 |
switch (c) {
|
| 824 |
case 'C': |
| 825 |
Cflag = 1;
|
| 826 |
break;
|
| 827 |
case 'P': |
| 828 |
Pflag = 1;
|
| 829 |
pattern = parse_pattern(optarg); |
| 830 |
if (pattern < 0) { |
| 831 |
return 0; |
| 832 |
} |
| 833 |
break;
|
| 834 |
case 'q': |
| 835 |
qflag = 1;
|
| 836 |
break;
|
| 837 |
case 'v': |
| 838 |
vflag = 1;
|
| 839 |
break;
|
| 840 |
default:
|
| 841 |
return qemuio_command_usage(&readv_cmd);
|
| 842 |
} |
| 843 |
} |
| 844 |
|
| 845 |
if (optind > argc - 2) { |
| 846 |
return qemuio_command_usage(&readv_cmd);
|
| 847 |
} |
| 848 |
|
| 849 |
|
| 850 |
offset = cvtnum(argv[optind]); |
| 851 |
if (offset < 0) { |
| 852 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 853 |
return 0; |
| 854 |
} |
| 855 |
optind++; |
| 856 |
|
| 857 |
if (offset & 0x1ff) { |
| 858 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 859 |
offset); |
| 860 |
return 0; |
| 861 |
} |
| 862 |
|
| 863 |
nr_iov = argc - optind; |
| 864 |
buf = create_iovec(bs, &qiov, &argv[optind], nr_iov, 0xab);
|
| 865 |
if (buf == NULL) { |
| 866 |
return 0; |
| 867 |
} |
| 868 |
|
| 869 |
gettimeofday(&t1, NULL);
|
| 870 |
cnt = do_aio_readv(bs, &qiov, offset, &total); |
| 871 |
gettimeofday(&t2, NULL);
|
| 872 |
|
| 873 |
if (cnt < 0) { |
| 874 |
printf("readv failed: %s\n", strerror(-cnt));
|
| 875 |
goto out;
|
| 876 |
} |
| 877 |
|
| 878 |
if (Pflag) {
|
| 879 |
void *cmp_buf = g_malloc(qiov.size);
|
| 880 |
memset(cmp_buf, pattern, qiov.size); |
| 881 |
if (memcmp(buf, cmp_buf, qiov.size)) {
|
| 882 |
printf("Pattern verification failed at offset %"
|
| 883 |
PRId64 ", %zd bytes\n", offset, qiov.size);
|
| 884 |
} |
| 885 |
g_free(cmp_buf); |
| 886 |
} |
| 887 |
|
| 888 |
if (qflag) {
|
| 889 |
goto out;
|
| 890 |
} |
| 891 |
|
| 892 |
if (vflag) {
|
| 893 |
dump_buffer(buf, offset, qiov.size); |
| 894 |
} |
| 895 |
|
| 896 |
/* Finally, report back -- -C gives a parsable format */
|
| 897 |
t2 = tsub(t2, t1); |
| 898 |
print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
|
| 899 |
|
| 900 |
out:
|
| 901 |
qemu_iovec_destroy(&qiov); |
| 902 |
qemu_io_free(buf); |
| 903 |
return 0; |
| 904 |
} |
| 905 |
|
| 906 |
static void write_help(void) |
| 907 |
{
|
| 908 |
printf( |
| 909 |
"\n"
|
| 910 |
" writes a range of bytes from the given offset\n"
|
| 911 |
"\n"
|
| 912 |
" Example:\n"
|
| 913 |
" 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
|
| 914 |
"\n"
|
| 915 |
" Writes into a segment of the currently open file, using a buffer\n"
|
| 916 |
" filled with a set pattern (0xcdcdcdcd).\n"
|
| 917 |
" -b, -- write to the VM state rather than the virtual disk\n"
|
| 918 |
" -c, -- write compressed data with bdrv_write_compressed\n"
|
| 919 |
" -p, -- use bdrv_pwrite to write the file\n"
|
| 920 |
" -P, -- use different pattern to fill file\n"
|
| 921 |
" -C, -- report statistics in a machine parsable format\n"
|
| 922 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 923 |
" -z, -- write zeroes using bdrv_co_write_zeroes\n"
|
| 924 |
"\n");
|
| 925 |
} |
| 926 |
|
| 927 |
static int write_f(BlockDriverState *bs, int argc, char **argv); |
| 928 |
|
| 929 |
static const cmdinfo_t write_cmd = { |
| 930 |
.name = "write",
|
| 931 |
.altname = "w",
|
| 932 |
.cfunc = write_f, |
| 933 |
.argmin = 2,
|
| 934 |
.argmax = -1,
|
| 935 |
.args = "[-bcCpqz] [-P pattern ] off len",
|
| 936 |
.oneline = "writes a number of bytes at a specified offset",
|
| 937 |
.help = write_help, |
| 938 |
}; |
| 939 |
|
| 940 |
static int write_f(BlockDriverState *bs, int argc, char **argv) |
| 941 |
{
|
| 942 |
struct timeval t1, t2;
|
| 943 |
int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0; |
| 944 |
int cflag = 0; |
| 945 |
int c, cnt;
|
| 946 |
char *buf = NULL; |
| 947 |
int64_t offset; |
| 948 |
int count;
|
| 949 |
/* Some compilers get confused and warn if this is not initialized. */
|
| 950 |
int total = 0; |
| 951 |
int pattern = 0xcd; |
| 952 |
|
| 953 |
while ((c = getopt(argc, argv, "bcCpP:qz")) != EOF) { |
| 954 |
switch (c) {
|
| 955 |
case 'b': |
| 956 |
bflag = 1;
|
| 957 |
break;
|
| 958 |
case 'c': |
| 959 |
cflag = 1;
|
| 960 |
break;
|
| 961 |
case 'C': |
| 962 |
Cflag = 1;
|
| 963 |
break;
|
| 964 |
case 'p': |
| 965 |
pflag = 1;
|
| 966 |
break;
|
| 967 |
case 'P': |
| 968 |
Pflag = 1;
|
| 969 |
pattern = parse_pattern(optarg); |
| 970 |
if (pattern < 0) { |
| 971 |
return 0; |
| 972 |
} |
| 973 |
break;
|
| 974 |
case 'q': |
| 975 |
qflag = 1;
|
| 976 |
break;
|
| 977 |
case 'z': |
| 978 |
zflag = 1;
|
| 979 |
break;
|
| 980 |
default:
|
| 981 |
return qemuio_command_usage(&write_cmd);
|
| 982 |
} |
| 983 |
} |
| 984 |
|
| 985 |
if (optind != argc - 2) { |
| 986 |
return qemuio_command_usage(&write_cmd);
|
| 987 |
} |
| 988 |
|
| 989 |
if (bflag + pflag + zflag > 1) { |
| 990 |
printf("-b, -p, or -z cannot be specified at the same time\n");
|
| 991 |
return 0; |
| 992 |
} |
| 993 |
|
| 994 |
if (zflag && Pflag) {
|
| 995 |
printf("-z and -P cannot be specified at the same time\n");
|
| 996 |
return 0; |
| 997 |
} |
| 998 |
|
| 999 |
offset = cvtnum(argv[optind]); |
| 1000 |
if (offset < 0) { |
| 1001 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1002 |
return 0; |
| 1003 |
} |
| 1004 |
|
| 1005 |
optind++; |
| 1006 |
count = cvtnum(argv[optind]); |
| 1007 |
if (count < 0) { |
| 1008 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1009 |
return 0; |
| 1010 |
} |
| 1011 |
|
| 1012 |
if (!pflag) {
|
| 1013 |
if (offset & 0x1ff) { |
| 1014 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 1015 |
offset); |
| 1016 |
return 0; |
| 1017 |
} |
| 1018 |
|
| 1019 |
if (count & 0x1ff) { |
| 1020 |
printf("count %d is not sector aligned\n",
|
| 1021 |
count); |
| 1022 |
return 0; |
| 1023 |
} |
| 1024 |
} |
| 1025 |
|
| 1026 |
if (!zflag) {
|
| 1027 |
buf = qemu_io_alloc(bs, count, pattern); |
| 1028 |
} |
| 1029 |
|
| 1030 |
gettimeofday(&t1, NULL);
|
| 1031 |
if (pflag) {
|
| 1032 |
cnt = do_pwrite(bs, buf, offset, count, &total); |
| 1033 |
} else if (bflag) { |
| 1034 |
cnt = do_save_vmstate(bs, buf, offset, count, &total); |
| 1035 |
} else if (zflag) { |
| 1036 |
cnt = do_co_write_zeroes(bs, offset, count, &total); |
| 1037 |
} else if (cflag) { |
| 1038 |
cnt = do_write_compressed(bs, buf, offset, count, &total); |
| 1039 |
} else {
|
| 1040 |
cnt = do_write(bs, buf, offset, count, &total); |
| 1041 |
} |
| 1042 |
gettimeofday(&t2, NULL);
|
| 1043 |
|
| 1044 |
if (cnt < 0) { |
| 1045 |
printf("write failed: %s\n", strerror(-cnt));
|
| 1046 |
goto out;
|
| 1047 |
} |
| 1048 |
|
| 1049 |
if (qflag) {
|
| 1050 |
goto out;
|
| 1051 |
} |
| 1052 |
|
| 1053 |
/* Finally, report back -- -C gives a parsable format */
|
| 1054 |
t2 = tsub(t2, t1); |
| 1055 |
print_report("wrote", &t2, offset, count, total, cnt, Cflag);
|
| 1056 |
|
| 1057 |
out:
|
| 1058 |
if (!zflag) {
|
| 1059 |
qemu_io_free(buf); |
| 1060 |
} |
| 1061 |
|
| 1062 |
return 0; |
| 1063 |
} |
| 1064 |
|
| 1065 |
static void |
| 1066 |
writev_help(void)
|
| 1067 |
{
|
| 1068 |
printf( |
| 1069 |
"\n"
|
| 1070 |
" writes a range of bytes from the given offset source from multiple buffers\n"
|
| 1071 |
"\n"
|
| 1072 |
" Example:\n"
|
| 1073 |
" 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
|
| 1074 |
"\n"
|
| 1075 |
" Writes into a segment of the currently open file, using a buffer\n"
|
| 1076 |
" filled with a set pattern (0xcdcdcdcd).\n"
|
| 1077 |
" -P, -- use different pattern to fill file\n"
|
| 1078 |
" -C, -- report statistics in a machine parsable format\n"
|
| 1079 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 1080 |
"\n");
|
| 1081 |
} |
| 1082 |
|
| 1083 |
static int writev_f(BlockDriverState *bs, int argc, char **argv); |
| 1084 |
|
| 1085 |
static const cmdinfo_t writev_cmd = { |
| 1086 |
.name = "writev",
|
| 1087 |
.cfunc = writev_f, |
| 1088 |
.argmin = 2,
|
| 1089 |
.argmax = -1,
|
| 1090 |
.args = "[-Cq] [-P pattern ] off len [len..]",
|
| 1091 |
.oneline = "writes a number of bytes at a specified offset",
|
| 1092 |
.help = writev_help, |
| 1093 |
}; |
| 1094 |
|
| 1095 |
static int writev_f(BlockDriverState *bs, int argc, char **argv) |
| 1096 |
{
|
| 1097 |
struct timeval t1, t2;
|
| 1098 |
int Cflag = 0, qflag = 0; |
| 1099 |
int c, cnt;
|
| 1100 |
char *buf;
|
| 1101 |
int64_t offset; |
| 1102 |
/* Some compilers get confused and warn if this is not initialized. */
|
| 1103 |
int total = 0; |
| 1104 |
int nr_iov;
|
| 1105 |
int pattern = 0xcd; |
| 1106 |
QEMUIOVector qiov; |
| 1107 |
|
| 1108 |
while ((c = getopt(argc, argv, "CqP:")) != EOF) { |
| 1109 |
switch (c) {
|
| 1110 |
case 'C': |
| 1111 |
Cflag = 1;
|
| 1112 |
break;
|
| 1113 |
case 'q': |
| 1114 |
qflag = 1;
|
| 1115 |
break;
|
| 1116 |
case 'P': |
| 1117 |
pattern = parse_pattern(optarg); |
| 1118 |
if (pattern < 0) { |
| 1119 |
return 0; |
| 1120 |
} |
| 1121 |
break;
|
| 1122 |
default:
|
| 1123 |
return qemuio_command_usage(&writev_cmd);
|
| 1124 |
} |
| 1125 |
} |
| 1126 |
|
| 1127 |
if (optind > argc - 2) { |
| 1128 |
return qemuio_command_usage(&writev_cmd);
|
| 1129 |
} |
| 1130 |
|
| 1131 |
offset = cvtnum(argv[optind]); |
| 1132 |
if (offset < 0) { |
| 1133 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1134 |
return 0; |
| 1135 |
} |
| 1136 |
optind++; |
| 1137 |
|
| 1138 |
if (offset & 0x1ff) { |
| 1139 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 1140 |
offset); |
| 1141 |
return 0; |
| 1142 |
} |
| 1143 |
|
| 1144 |
nr_iov = argc - optind; |
| 1145 |
buf = create_iovec(bs, &qiov, &argv[optind], nr_iov, pattern); |
| 1146 |
if (buf == NULL) { |
| 1147 |
return 0; |
| 1148 |
} |
| 1149 |
|
| 1150 |
gettimeofday(&t1, NULL);
|
| 1151 |
cnt = do_aio_writev(bs, &qiov, offset, &total); |
| 1152 |
gettimeofday(&t2, NULL);
|
| 1153 |
|
| 1154 |
if (cnt < 0) { |
| 1155 |
printf("writev failed: %s\n", strerror(-cnt));
|
| 1156 |
goto out;
|
| 1157 |
} |
| 1158 |
|
| 1159 |
if (qflag) {
|
| 1160 |
goto out;
|
| 1161 |
} |
| 1162 |
|
| 1163 |
/* Finally, report back -- -C gives a parsable format */
|
| 1164 |
t2 = tsub(t2, t1); |
| 1165 |
print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
|
| 1166 |
out:
|
| 1167 |
qemu_iovec_destroy(&qiov); |
| 1168 |
qemu_io_free(buf); |
| 1169 |
return 0; |
| 1170 |
} |
| 1171 |
|
| 1172 |
static void multiwrite_help(void) |
| 1173 |
{
|
| 1174 |
printf( |
| 1175 |
"\n"
|
| 1176 |
" writes a range of bytes from the given offset source from multiple buffers,\n"
|
| 1177 |
" in a batch of requests that may be merged by qemu\n"
|
| 1178 |
"\n"
|
| 1179 |
" Example:\n"
|
| 1180 |
" 'multiwrite 512 1k 1k ; 4k 1k'\n"
|
| 1181 |
" writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
|
| 1182 |
"\n"
|
| 1183 |
" Writes into a segment of the currently open file, using a buffer\n"
|
| 1184 |
" filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
|
| 1185 |
" by one for each request contained in the multiwrite command.\n"
|
| 1186 |
" -P, -- use different pattern to fill file\n"
|
| 1187 |
" -C, -- report statistics in a machine parsable format\n"
|
| 1188 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 1189 |
"\n");
|
| 1190 |
} |
| 1191 |
|
| 1192 |
static int multiwrite_f(BlockDriverState *bs, int argc, char **argv); |
| 1193 |
|
| 1194 |
static const cmdinfo_t multiwrite_cmd = { |
| 1195 |
.name = "multiwrite",
|
| 1196 |
.cfunc = multiwrite_f, |
| 1197 |
.argmin = 2,
|
| 1198 |
.argmax = -1,
|
| 1199 |
.args = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
|
| 1200 |
.oneline = "issues multiple write requests at once",
|
| 1201 |
.help = multiwrite_help, |
| 1202 |
}; |
| 1203 |
|
| 1204 |
static int multiwrite_f(BlockDriverState *bs, int argc, char **argv) |
| 1205 |
{
|
| 1206 |
struct timeval t1, t2;
|
| 1207 |
int Cflag = 0, qflag = 0; |
| 1208 |
int c, cnt;
|
| 1209 |
char **buf;
|
| 1210 |
int64_t offset, first_offset = 0;
|
| 1211 |
/* Some compilers get confused and warn if this is not initialized. */
|
| 1212 |
int total = 0; |
| 1213 |
int nr_iov;
|
| 1214 |
int nr_reqs;
|
| 1215 |
int pattern = 0xcd; |
| 1216 |
QEMUIOVector *qiovs; |
| 1217 |
int i;
|
| 1218 |
BlockRequest *reqs; |
| 1219 |
|
| 1220 |
while ((c = getopt(argc, argv, "CqP:")) != EOF) { |
| 1221 |
switch (c) {
|
| 1222 |
case 'C': |
| 1223 |
Cflag = 1;
|
| 1224 |
break;
|
| 1225 |
case 'q': |
| 1226 |
qflag = 1;
|
| 1227 |
break;
|
| 1228 |
case 'P': |
| 1229 |
pattern = parse_pattern(optarg); |
| 1230 |
if (pattern < 0) { |
| 1231 |
return 0; |
| 1232 |
} |
| 1233 |
break;
|
| 1234 |
default:
|
| 1235 |
return qemuio_command_usage(&writev_cmd);
|
| 1236 |
} |
| 1237 |
} |
| 1238 |
|
| 1239 |
if (optind > argc - 2) { |
| 1240 |
return qemuio_command_usage(&writev_cmd);
|
| 1241 |
} |
| 1242 |
|
| 1243 |
nr_reqs = 1;
|
| 1244 |
for (i = optind; i < argc; i++) {
|
| 1245 |
if (!strcmp(argv[i], ";")) { |
| 1246 |
nr_reqs++; |
| 1247 |
} |
| 1248 |
} |
| 1249 |
|
| 1250 |
reqs = g_malloc0(nr_reqs * sizeof(*reqs));
|
| 1251 |
buf = g_malloc0(nr_reqs * sizeof(*buf));
|
| 1252 |
qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
|
| 1253 |
|
| 1254 |
for (i = 0; i < nr_reqs && optind < argc; i++) { |
| 1255 |
int j;
|
| 1256 |
|
| 1257 |
/* Read the offset of the request */
|
| 1258 |
offset = cvtnum(argv[optind]); |
| 1259 |
if (offset < 0) { |
| 1260 |
printf("non-numeric offset argument -- %s\n", argv[optind]);
|
| 1261 |
goto out;
|
| 1262 |
} |
| 1263 |
optind++; |
| 1264 |
|
| 1265 |
if (offset & 0x1ff) { |
| 1266 |
printf("offset %lld is not sector aligned\n",
|
| 1267 |
(long long)offset); |
| 1268 |
goto out;
|
| 1269 |
} |
| 1270 |
|
| 1271 |
if (i == 0) { |
| 1272 |
first_offset = offset; |
| 1273 |
} |
| 1274 |
|
| 1275 |
/* Read lengths for qiov entries */
|
| 1276 |
for (j = optind; j < argc; j++) {
|
| 1277 |
if (!strcmp(argv[j], ";")) { |
| 1278 |
break;
|
| 1279 |
} |
| 1280 |
} |
| 1281 |
|
| 1282 |
nr_iov = j - optind; |
| 1283 |
|
| 1284 |
/* Build request */
|
| 1285 |
buf[i] = create_iovec(bs, &qiovs[i], &argv[optind], nr_iov, pattern); |
| 1286 |
if (buf[i] == NULL) { |
| 1287 |
goto out;
|
| 1288 |
} |
| 1289 |
|
| 1290 |
reqs[i].qiov = &qiovs[i]; |
| 1291 |
reqs[i].sector = offset >> 9;
|
| 1292 |
reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
|
| 1293 |
|
| 1294 |
optind = j + 1;
|
| 1295 |
|
| 1296 |
pattern++; |
| 1297 |
} |
| 1298 |
|
| 1299 |
/* If there were empty requests at the end, ignore them */
|
| 1300 |
nr_reqs = i; |
| 1301 |
|
| 1302 |
gettimeofday(&t1, NULL);
|
| 1303 |
cnt = do_aio_multiwrite(bs, reqs, nr_reqs, &total); |
| 1304 |
gettimeofday(&t2, NULL);
|
| 1305 |
|
| 1306 |
if (cnt < 0) { |
| 1307 |
printf("aio_multiwrite failed: %s\n", strerror(-cnt));
|
| 1308 |
goto out;
|
| 1309 |
} |
| 1310 |
|
| 1311 |
if (qflag) {
|
| 1312 |
goto out;
|
| 1313 |
} |
| 1314 |
|
| 1315 |
/* Finally, report back -- -C gives a parsable format */
|
| 1316 |
t2 = tsub(t2, t1); |
| 1317 |
print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
|
| 1318 |
out:
|
| 1319 |
for (i = 0; i < nr_reqs; i++) { |
| 1320 |
qemu_io_free(buf[i]); |
| 1321 |
if (reqs[i].qiov != NULL) { |
| 1322 |
qemu_iovec_destroy(&qiovs[i]); |
| 1323 |
} |
| 1324 |
} |
| 1325 |
g_free(buf); |
| 1326 |
g_free(reqs); |
| 1327 |
g_free(qiovs); |
| 1328 |
return 0; |
| 1329 |
} |
| 1330 |
|
| 1331 |
struct aio_ctx {
|
| 1332 |
QEMUIOVector qiov; |
| 1333 |
int64_t offset; |
| 1334 |
char *buf;
|
| 1335 |
int qflag;
|
| 1336 |
int vflag;
|
| 1337 |
int Cflag;
|
| 1338 |
int Pflag;
|
| 1339 |
int pattern;
|
| 1340 |
struct timeval t1;
|
| 1341 |
}; |
| 1342 |
|
| 1343 |
static void aio_write_done(void *opaque, int ret) |
| 1344 |
{
|
| 1345 |
struct aio_ctx *ctx = opaque;
|
| 1346 |
struct timeval t2;
|
| 1347 |
|
| 1348 |
gettimeofday(&t2, NULL);
|
| 1349 |
|
| 1350 |
|
| 1351 |
if (ret < 0) { |
| 1352 |
printf("aio_write failed: %s\n", strerror(-ret));
|
| 1353 |
goto out;
|
| 1354 |
} |
| 1355 |
|
| 1356 |
if (ctx->qflag) {
|
| 1357 |
goto out;
|
| 1358 |
} |
| 1359 |
|
| 1360 |
/* Finally, report back -- -C gives a parsable format */
|
| 1361 |
t2 = tsub(t2, ctx->t1); |
| 1362 |
print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
|
| 1363 |
ctx->qiov.size, 1, ctx->Cflag);
|
| 1364 |
out:
|
| 1365 |
qemu_io_free(ctx->buf); |
| 1366 |
qemu_iovec_destroy(&ctx->qiov); |
| 1367 |
g_free(ctx); |
| 1368 |
} |
| 1369 |
|
| 1370 |
static void aio_read_done(void *opaque, int ret) |
| 1371 |
{
|
| 1372 |
struct aio_ctx *ctx = opaque;
|
| 1373 |
struct timeval t2;
|
| 1374 |
|
| 1375 |
gettimeofday(&t2, NULL);
|
| 1376 |
|
| 1377 |
if (ret < 0) { |
| 1378 |
printf("readv failed: %s\n", strerror(-ret));
|
| 1379 |
goto out;
|
| 1380 |
} |
| 1381 |
|
| 1382 |
if (ctx->Pflag) {
|
| 1383 |
void *cmp_buf = g_malloc(ctx->qiov.size);
|
| 1384 |
|
| 1385 |
memset(cmp_buf, ctx->pattern, ctx->qiov.size); |
| 1386 |
if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
|
| 1387 |
printf("Pattern verification failed at offset %"
|
| 1388 |
PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
|
| 1389 |
} |
| 1390 |
g_free(cmp_buf); |
| 1391 |
} |
| 1392 |
|
| 1393 |
if (ctx->qflag) {
|
| 1394 |
goto out;
|
| 1395 |
} |
| 1396 |
|
| 1397 |
if (ctx->vflag) {
|
| 1398 |
dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); |
| 1399 |
} |
| 1400 |
|
| 1401 |
/* Finally, report back -- -C gives a parsable format */
|
| 1402 |
t2 = tsub(t2, ctx->t1); |
| 1403 |
print_report("read", &t2, ctx->offset, ctx->qiov.size,
|
| 1404 |
ctx->qiov.size, 1, ctx->Cflag);
|
| 1405 |
out:
|
| 1406 |
qemu_io_free(ctx->buf); |
| 1407 |
qemu_iovec_destroy(&ctx->qiov); |
| 1408 |
g_free(ctx); |
| 1409 |
} |
| 1410 |
|
| 1411 |
static void aio_read_help(void) |
| 1412 |
{
|
| 1413 |
printf( |
| 1414 |
"\n"
|
| 1415 |
" asynchronously reads a range of bytes from the given offset\n"
|
| 1416 |
"\n"
|
| 1417 |
" Example:\n"
|
| 1418 |
" 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
|
| 1419 |
"\n"
|
| 1420 |
" Reads a segment of the currently open file, optionally dumping it to the\n"
|
| 1421 |
" standard output stream (with -v option) for subsequent inspection.\n"
|
| 1422 |
" The read is performed asynchronously and the aio_flush command must be\n"
|
| 1423 |
" used to ensure all outstanding aio requests have been completed.\n"
|
| 1424 |
" -C, -- report statistics in a machine parsable format\n"
|
| 1425 |
" -P, -- use a pattern to verify read data\n"
|
| 1426 |
" -v, -- dump buffer to standard output\n"
|
| 1427 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 1428 |
"\n");
|
| 1429 |
} |
| 1430 |
|
| 1431 |
static int aio_read_f(BlockDriverState *bs, int argc, char **argv); |
| 1432 |
|
| 1433 |
static const cmdinfo_t aio_read_cmd = { |
| 1434 |
.name = "aio_read",
|
| 1435 |
.cfunc = aio_read_f, |
| 1436 |
.argmin = 2,
|
| 1437 |
.argmax = -1,
|
| 1438 |
.args = "[-Cqv] [-P pattern ] off len [len..]",
|
| 1439 |
.oneline = "asynchronously reads a number of bytes",
|
| 1440 |
.help = aio_read_help, |
| 1441 |
}; |
| 1442 |
|
| 1443 |
static int aio_read_f(BlockDriverState *bs, int argc, char **argv) |
| 1444 |
{
|
| 1445 |
int nr_iov, c;
|
| 1446 |
struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| 1447 |
|
| 1448 |
while ((c = getopt(argc, argv, "CP:qv")) != EOF) { |
| 1449 |
switch (c) {
|
| 1450 |
case 'C': |
| 1451 |
ctx->Cflag = 1;
|
| 1452 |
break;
|
| 1453 |
case 'P': |
| 1454 |
ctx->Pflag = 1;
|
| 1455 |
ctx->pattern = parse_pattern(optarg); |
| 1456 |
if (ctx->pattern < 0) { |
| 1457 |
g_free(ctx); |
| 1458 |
return 0; |
| 1459 |
} |
| 1460 |
break;
|
| 1461 |
case 'q': |
| 1462 |
ctx->qflag = 1;
|
| 1463 |
break;
|
| 1464 |
case 'v': |
| 1465 |
ctx->vflag = 1;
|
| 1466 |
break;
|
| 1467 |
default:
|
| 1468 |
g_free(ctx); |
| 1469 |
return qemuio_command_usage(&aio_read_cmd);
|
| 1470 |
} |
| 1471 |
} |
| 1472 |
|
| 1473 |
if (optind > argc - 2) { |
| 1474 |
g_free(ctx); |
| 1475 |
return qemuio_command_usage(&aio_read_cmd);
|
| 1476 |
} |
| 1477 |
|
| 1478 |
ctx->offset = cvtnum(argv[optind]); |
| 1479 |
if (ctx->offset < 0) { |
| 1480 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1481 |
g_free(ctx); |
| 1482 |
return 0; |
| 1483 |
} |
| 1484 |
optind++; |
| 1485 |
|
| 1486 |
if (ctx->offset & 0x1ff) { |
| 1487 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 1488 |
ctx->offset); |
| 1489 |
g_free(ctx); |
| 1490 |
return 0; |
| 1491 |
} |
| 1492 |
|
| 1493 |
nr_iov = argc - optind; |
| 1494 |
ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, 0xab);
|
| 1495 |
if (ctx->buf == NULL) { |
| 1496 |
g_free(ctx); |
| 1497 |
return 0; |
| 1498 |
} |
| 1499 |
|
| 1500 |
gettimeofday(&ctx->t1, NULL);
|
| 1501 |
bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
|
| 1502 |
ctx->qiov.size >> 9, aio_read_done, ctx);
|
| 1503 |
return 0; |
| 1504 |
} |
| 1505 |
|
| 1506 |
static void aio_write_help(void) |
| 1507 |
{
|
| 1508 |
printf( |
| 1509 |
"\n"
|
| 1510 |
" asynchronously writes a range of bytes from the given offset source\n"
|
| 1511 |
" from multiple buffers\n"
|
| 1512 |
"\n"
|
| 1513 |
" Example:\n"
|
| 1514 |
" 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
|
| 1515 |
"\n"
|
| 1516 |
" Writes into a segment of the currently open file, using a buffer\n"
|
| 1517 |
" filled with a set pattern (0xcdcdcdcd).\n"
|
| 1518 |
" The write is performed asynchronously and the aio_flush command must be\n"
|
| 1519 |
" used to ensure all outstanding aio requests have been completed.\n"
|
| 1520 |
" -P, -- use different pattern to fill file\n"
|
| 1521 |
" -C, -- report statistics in a machine parsable format\n"
|
| 1522 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 1523 |
"\n");
|
| 1524 |
} |
| 1525 |
|
| 1526 |
static int aio_write_f(BlockDriverState *bs, int argc, char **argv); |
| 1527 |
|
| 1528 |
static const cmdinfo_t aio_write_cmd = { |
| 1529 |
.name = "aio_write",
|
| 1530 |
.cfunc = aio_write_f, |
| 1531 |
.argmin = 2,
|
| 1532 |
.argmax = -1,
|
| 1533 |
.args = "[-Cq] [-P pattern ] off len [len..]",
|
| 1534 |
.oneline = "asynchronously writes a number of bytes",
|
| 1535 |
.help = aio_write_help, |
| 1536 |
}; |
| 1537 |
|
| 1538 |
static int aio_write_f(BlockDriverState *bs, int argc, char **argv) |
| 1539 |
{
|
| 1540 |
int nr_iov, c;
|
| 1541 |
int pattern = 0xcd; |
| 1542 |
struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| 1543 |
|
| 1544 |
while ((c = getopt(argc, argv, "CqP:")) != EOF) { |
| 1545 |
switch (c) {
|
| 1546 |
case 'C': |
| 1547 |
ctx->Cflag = 1;
|
| 1548 |
break;
|
| 1549 |
case 'q': |
| 1550 |
ctx->qflag = 1;
|
| 1551 |
break;
|
| 1552 |
case 'P': |
| 1553 |
pattern = parse_pattern(optarg); |
| 1554 |
if (pattern < 0) { |
| 1555 |
g_free(ctx); |
| 1556 |
return 0; |
| 1557 |
} |
| 1558 |
break;
|
| 1559 |
default:
|
| 1560 |
g_free(ctx); |
| 1561 |
return qemuio_command_usage(&aio_write_cmd);
|
| 1562 |
} |
| 1563 |
} |
| 1564 |
|
| 1565 |
if (optind > argc - 2) { |
| 1566 |
g_free(ctx); |
| 1567 |
return qemuio_command_usage(&aio_write_cmd);
|
| 1568 |
} |
| 1569 |
|
| 1570 |
ctx->offset = cvtnum(argv[optind]); |
| 1571 |
if (ctx->offset < 0) { |
| 1572 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1573 |
g_free(ctx); |
| 1574 |
return 0; |
| 1575 |
} |
| 1576 |
optind++; |
| 1577 |
|
| 1578 |
if (ctx->offset & 0x1ff) { |
| 1579 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 1580 |
ctx->offset); |
| 1581 |
g_free(ctx); |
| 1582 |
return 0; |
| 1583 |
} |
| 1584 |
|
| 1585 |
nr_iov = argc - optind; |
| 1586 |
ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, pattern); |
| 1587 |
if (ctx->buf == NULL) { |
| 1588 |
g_free(ctx); |
| 1589 |
return 0; |
| 1590 |
} |
| 1591 |
|
| 1592 |
gettimeofday(&ctx->t1, NULL);
|
| 1593 |
bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
|
| 1594 |
ctx->qiov.size >> 9, aio_write_done, ctx);
|
| 1595 |
return 0; |
| 1596 |
} |
| 1597 |
|
| 1598 |
static int aio_flush_f(BlockDriverState *bs, int argc, char **argv) |
| 1599 |
{
|
| 1600 |
bdrv_drain_all(); |
| 1601 |
return 0; |
| 1602 |
} |
| 1603 |
|
| 1604 |
static const cmdinfo_t aio_flush_cmd = { |
| 1605 |
.name = "aio_flush",
|
| 1606 |
.cfunc = aio_flush_f, |
| 1607 |
.oneline = "completes all outstanding aio requests"
|
| 1608 |
}; |
| 1609 |
|
| 1610 |
static int flush_f(BlockDriverState *bs, int argc, char **argv) |
| 1611 |
{
|
| 1612 |
bdrv_flush(bs); |
| 1613 |
return 0; |
| 1614 |
} |
| 1615 |
|
| 1616 |
static const cmdinfo_t flush_cmd = { |
| 1617 |
.name = "flush",
|
| 1618 |
.altname = "f",
|
| 1619 |
.cfunc = flush_f, |
| 1620 |
.oneline = "flush all in-core file state to disk",
|
| 1621 |
}; |
| 1622 |
|
| 1623 |
static int truncate_f(BlockDriverState *bs, int argc, char **argv) |
| 1624 |
{
|
| 1625 |
int64_t offset; |
| 1626 |
int ret;
|
| 1627 |
|
| 1628 |
offset = cvtnum(argv[1]);
|
| 1629 |
if (offset < 0) { |
| 1630 |
printf("non-numeric truncate argument -- %s\n", argv[1]); |
| 1631 |
return 0; |
| 1632 |
} |
| 1633 |
|
| 1634 |
ret = bdrv_truncate(bs, offset); |
| 1635 |
if (ret < 0) { |
| 1636 |
printf("truncate: %s\n", strerror(-ret));
|
| 1637 |
return 0; |
| 1638 |
} |
| 1639 |
|
| 1640 |
return 0; |
| 1641 |
} |
| 1642 |
|
| 1643 |
static const cmdinfo_t truncate_cmd = { |
| 1644 |
.name = "truncate",
|
| 1645 |
.altname = "t",
|
| 1646 |
.cfunc = truncate_f, |
| 1647 |
.argmin = 1,
|
| 1648 |
.argmax = 1,
|
| 1649 |
.args = "off",
|
| 1650 |
.oneline = "truncates the current file at the given offset",
|
| 1651 |
}; |
| 1652 |
|
| 1653 |
static int length_f(BlockDriverState *bs, int argc, char **argv) |
| 1654 |
{
|
| 1655 |
int64_t size; |
| 1656 |
char s1[64]; |
| 1657 |
|
| 1658 |
size = bdrv_getlength(bs); |
| 1659 |
if (size < 0) { |
| 1660 |
printf("getlength: %s\n", strerror(-size));
|
| 1661 |
return 0; |
| 1662 |
} |
| 1663 |
|
| 1664 |
cvtstr(size, s1, sizeof(s1));
|
| 1665 |
printf("%s\n", s1);
|
| 1666 |
return 0; |
| 1667 |
} |
| 1668 |
|
| 1669 |
|
| 1670 |
static const cmdinfo_t length_cmd = { |
| 1671 |
.name = "length",
|
| 1672 |
.altname = "l",
|
| 1673 |
.cfunc = length_f, |
| 1674 |
.oneline = "gets the length of the current file",
|
| 1675 |
}; |
| 1676 |
|
| 1677 |
|
| 1678 |
static int info_f(BlockDriverState *bs, int argc, char **argv) |
| 1679 |
{
|
| 1680 |
BlockDriverInfo bdi; |
| 1681 |
char s1[64], s2[64]; |
| 1682 |
int ret;
|
| 1683 |
|
| 1684 |
if (bs->drv && bs->drv->format_name) {
|
| 1685 |
printf("format name: %s\n", bs->drv->format_name);
|
| 1686 |
} |
| 1687 |
if (bs->drv && bs->drv->protocol_name) {
|
| 1688 |
printf("format name: %s\n", bs->drv->protocol_name);
|
| 1689 |
} |
| 1690 |
|
| 1691 |
ret = bdrv_get_info(bs, &bdi); |
| 1692 |
if (ret) {
|
| 1693 |
return 0; |
| 1694 |
} |
| 1695 |
|
| 1696 |
cvtstr(bdi.cluster_size, s1, sizeof(s1));
|
| 1697 |
cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
|
| 1698 |
|
| 1699 |
printf("cluster size: %s\n", s1);
|
| 1700 |
printf("vm state offset: %s\n", s2);
|
| 1701 |
|
| 1702 |
return 0; |
| 1703 |
} |
| 1704 |
|
| 1705 |
|
| 1706 |
|
| 1707 |
static const cmdinfo_t info_cmd = { |
| 1708 |
.name = "info",
|
| 1709 |
.altname = "i",
|
| 1710 |
.cfunc = info_f, |
| 1711 |
.oneline = "prints information about the current file",
|
| 1712 |
}; |
| 1713 |
|
| 1714 |
static void discard_help(void) |
| 1715 |
{
|
| 1716 |
printf( |
| 1717 |
"\n"
|
| 1718 |
" discards a range of bytes from the given offset\n"
|
| 1719 |
"\n"
|
| 1720 |
" Example:\n"
|
| 1721 |
" 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
|
| 1722 |
"\n"
|
| 1723 |
" Discards a segment of the currently open file.\n"
|
| 1724 |
" -C, -- report statistics in a machine parsable format\n"
|
| 1725 |
" -q, -- quiet mode, do not show I/O statistics\n"
|
| 1726 |
"\n");
|
| 1727 |
} |
| 1728 |
|
| 1729 |
static int discard_f(BlockDriverState *bs, int argc, char **argv); |
| 1730 |
|
| 1731 |
static const cmdinfo_t discard_cmd = { |
| 1732 |
.name = "discard",
|
| 1733 |
.altname = "d",
|
| 1734 |
.cfunc = discard_f, |
| 1735 |
.argmin = 2,
|
| 1736 |
.argmax = -1,
|
| 1737 |
.args = "[-Cq] off len",
|
| 1738 |
.oneline = "discards a number of bytes at a specified offset",
|
| 1739 |
.help = discard_help, |
| 1740 |
}; |
| 1741 |
|
| 1742 |
static int discard_f(BlockDriverState *bs, int argc, char **argv) |
| 1743 |
{
|
| 1744 |
struct timeval t1, t2;
|
| 1745 |
int Cflag = 0, qflag = 0; |
| 1746 |
int c, ret;
|
| 1747 |
int64_t offset; |
| 1748 |
int count;
|
| 1749 |
|
| 1750 |
while ((c = getopt(argc, argv, "Cq")) != EOF) { |
| 1751 |
switch (c) {
|
| 1752 |
case 'C': |
| 1753 |
Cflag = 1;
|
| 1754 |
break;
|
| 1755 |
case 'q': |
| 1756 |
qflag = 1;
|
| 1757 |
break;
|
| 1758 |
default:
|
| 1759 |
return qemuio_command_usage(&discard_cmd);
|
| 1760 |
} |
| 1761 |
} |
| 1762 |
|
| 1763 |
if (optind != argc - 2) { |
| 1764 |
return qemuio_command_usage(&discard_cmd);
|
| 1765 |
} |
| 1766 |
|
| 1767 |
offset = cvtnum(argv[optind]); |
| 1768 |
if (offset < 0) { |
| 1769 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1770 |
return 0; |
| 1771 |
} |
| 1772 |
|
| 1773 |
optind++; |
| 1774 |
count = cvtnum(argv[optind]); |
| 1775 |
if (count < 0) { |
| 1776 |
printf("non-numeric length argument -- %s\n", argv[optind]);
|
| 1777 |
return 0; |
| 1778 |
} |
| 1779 |
|
| 1780 |
gettimeofday(&t1, NULL);
|
| 1781 |
ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS, |
| 1782 |
count >> BDRV_SECTOR_BITS); |
| 1783 |
gettimeofday(&t2, NULL);
|
| 1784 |
|
| 1785 |
if (ret < 0) { |
| 1786 |
printf("discard failed: %s\n", strerror(-ret));
|
| 1787 |
goto out;
|
| 1788 |
} |
| 1789 |
|
| 1790 |
/* Finally, report back -- -C gives a parsable format */
|
| 1791 |
if (!qflag) {
|
| 1792 |
t2 = tsub(t2, t1); |
| 1793 |
print_report("discard", &t2, offset, count, count, 1, Cflag); |
| 1794 |
} |
| 1795 |
|
| 1796 |
out:
|
| 1797 |
return 0; |
| 1798 |
} |
| 1799 |
|
| 1800 |
static int alloc_f(BlockDriverState *bs, int argc, char **argv) |
| 1801 |
{
|
| 1802 |
int64_t offset, sector_num; |
| 1803 |
int nb_sectors, remaining;
|
| 1804 |
char s1[64]; |
| 1805 |
int num, sum_alloc;
|
| 1806 |
int ret;
|
| 1807 |
|
| 1808 |
offset = cvtnum(argv[1]);
|
| 1809 |
if (offset < 0) { |
| 1810 |
printf("non-numeric offset argument -- %s\n", argv[1]); |
| 1811 |
return 0; |
| 1812 |
} else if (offset & 0x1ff) { |
| 1813 |
printf("offset %" PRId64 " is not sector aligned\n", |
| 1814 |
offset); |
| 1815 |
return 0; |
| 1816 |
} |
| 1817 |
|
| 1818 |
if (argc == 3) { |
| 1819 |
nb_sectors = cvtnum(argv[2]);
|
| 1820 |
if (nb_sectors < 0) { |
| 1821 |
printf("non-numeric length argument -- %s\n", argv[2]); |
| 1822 |
return 0; |
| 1823 |
} |
| 1824 |
} else {
|
| 1825 |
nb_sectors = 1;
|
| 1826 |
} |
| 1827 |
|
| 1828 |
remaining = nb_sectors; |
| 1829 |
sum_alloc = 0;
|
| 1830 |
sector_num = offset >> 9;
|
| 1831 |
while (remaining) {
|
| 1832 |
ret = bdrv_is_allocated(bs, sector_num, remaining, &num); |
| 1833 |
sector_num += num; |
| 1834 |
remaining -= num; |
| 1835 |
if (ret) {
|
| 1836 |
sum_alloc += num; |
| 1837 |
} |
| 1838 |
if (num == 0) { |
| 1839 |
nb_sectors -= remaining; |
| 1840 |
remaining = 0;
|
| 1841 |
} |
| 1842 |
} |
| 1843 |
|
| 1844 |
cvtstr(offset, s1, sizeof(s1));
|
| 1845 |
|
| 1846 |
printf("%d/%d sectors allocated at offset %s\n",
|
| 1847 |
sum_alloc, nb_sectors, s1); |
| 1848 |
return 0; |
| 1849 |
} |
| 1850 |
|
| 1851 |
static const cmdinfo_t alloc_cmd = { |
| 1852 |
.name = "alloc",
|
| 1853 |
.altname = "a",
|
| 1854 |
.argmin = 1,
|
| 1855 |
.argmax = 2,
|
| 1856 |
.cfunc = alloc_f, |
| 1857 |
.args = "off [sectors]",
|
| 1858 |
.oneline = "checks if a sector is present in the file",
|
| 1859 |
}; |
| 1860 |
|
| 1861 |
|
| 1862 |
static int map_is_allocated(BlockDriverState *bs, int64_t sector_num, |
| 1863 |
int64_t nb_sectors, int64_t *pnum) |
| 1864 |
{
|
| 1865 |
int num, num_checked;
|
| 1866 |
int ret, firstret;
|
| 1867 |
|
| 1868 |
num_checked = MIN(nb_sectors, INT_MAX); |
| 1869 |
ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); |
| 1870 |
if (ret < 0) { |
| 1871 |
return ret;
|
| 1872 |
} |
| 1873 |
|
| 1874 |
firstret = ret; |
| 1875 |
*pnum = num; |
| 1876 |
|
| 1877 |
while (nb_sectors > 0 && ret == firstret) { |
| 1878 |
sector_num += num; |
| 1879 |
nb_sectors -= num; |
| 1880 |
|
| 1881 |
num_checked = MIN(nb_sectors, INT_MAX); |
| 1882 |
ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); |
| 1883 |
if (ret == firstret) {
|
| 1884 |
*pnum += num; |
| 1885 |
} else {
|
| 1886 |
break;
|
| 1887 |
} |
| 1888 |
} |
| 1889 |
|
| 1890 |
return firstret;
|
| 1891 |
} |
| 1892 |
|
| 1893 |
static int map_f(BlockDriverState *bs, int argc, char **argv) |
| 1894 |
{
|
| 1895 |
int64_t offset; |
| 1896 |
int64_t nb_sectors; |
| 1897 |
char s1[64]; |
| 1898 |
int64_t num; |
| 1899 |
int ret;
|
| 1900 |
const char *retstr; |
| 1901 |
|
| 1902 |
offset = 0;
|
| 1903 |
nb_sectors = bs->total_sectors; |
| 1904 |
|
| 1905 |
do {
|
| 1906 |
ret = map_is_allocated(bs, offset, nb_sectors, &num); |
| 1907 |
if (ret < 0) { |
| 1908 |
error_report("Failed to get allocation status: %s", strerror(-ret));
|
| 1909 |
return 0; |
| 1910 |
} |
| 1911 |
|
| 1912 |
retstr = ret ? " allocated" : "not allocated"; |
| 1913 |
cvtstr(offset << 9ULL, s1, sizeof(s1)); |
| 1914 |
printf("[% 24" PRId64 "] % 8" PRId64 "/% 8" PRId64 " sectors %s " |
| 1915 |
"at offset %s (%d)\n",
|
| 1916 |
offset << 9ULL, num, nb_sectors, retstr, s1, ret);
|
| 1917 |
|
| 1918 |
offset += num; |
| 1919 |
nb_sectors -= num; |
| 1920 |
} while (offset < bs->total_sectors);
|
| 1921 |
|
| 1922 |
return 0; |
| 1923 |
} |
| 1924 |
|
| 1925 |
static const cmdinfo_t map_cmd = { |
| 1926 |
.name = "map",
|
| 1927 |
.argmin = 0,
|
| 1928 |
.argmax = 0,
|
| 1929 |
.cfunc = map_f, |
| 1930 |
.args = "",
|
| 1931 |
.oneline = "prints the allocated areas of a file",
|
| 1932 |
}; |
| 1933 |
|
| 1934 |
static int break_f(BlockDriverState *bs, int argc, char **argv) |
| 1935 |
{
|
| 1936 |
int ret;
|
| 1937 |
|
| 1938 |
ret = bdrv_debug_breakpoint(bs, argv[1], argv[2]); |
| 1939 |
if (ret < 0) { |
| 1940 |
printf("Could not set breakpoint: %s\n", strerror(-ret));
|
| 1941 |
} |
| 1942 |
|
| 1943 |
return 0; |
| 1944 |
} |
| 1945 |
|
| 1946 |
static const cmdinfo_t break_cmd = { |
| 1947 |
.name = "break",
|
| 1948 |
.argmin = 2,
|
| 1949 |
.argmax = 2,
|
| 1950 |
.cfunc = break_f, |
| 1951 |
.args = "event tag",
|
| 1952 |
.oneline = "sets a breakpoint on event and tags the stopped "
|
| 1953 |
"request as tag",
|
| 1954 |
}; |
| 1955 |
|
| 1956 |
static int resume_f(BlockDriverState *bs, int argc, char **argv) |
| 1957 |
{
|
| 1958 |
int ret;
|
| 1959 |
|
| 1960 |
ret = bdrv_debug_resume(bs, argv[1]);
|
| 1961 |
if (ret < 0) { |
| 1962 |
printf("Could not resume request: %s\n", strerror(-ret));
|
| 1963 |
} |
| 1964 |
|
| 1965 |
return 0; |
| 1966 |
} |
| 1967 |
|
| 1968 |
static const cmdinfo_t resume_cmd = { |
| 1969 |
.name = "resume",
|
| 1970 |
.argmin = 1,
|
| 1971 |
.argmax = 1,
|
| 1972 |
.cfunc = resume_f, |
| 1973 |
.args = "tag",
|
| 1974 |
.oneline = "resumes the request tagged as tag",
|
| 1975 |
}; |
| 1976 |
|
| 1977 |
static int wait_break_f(BlockDriverState *bs, int argc, char **argv) |
| 1978 |
{
|
| 1979 |
while (!bdrv_debug_is_suspended(bs, argv[1])) { |
| 1980 |
qemu_aio_wait(); |
| 1981 |
} |
| 1982 |
|
| 1983 |
return 0; |
| 1984 |
} |
| 1985 |
|
| 1986 |
static const cmdinfo_t wait_break_cmd = { |
| 1987 |
.name = "wait_break",
|
| 1988 |
.argmin = 1,
|
| 1989 |
.argmax = 1,
|
| 1990 |
.cfunc = wait_break_f, |
| 1991 |
.args = "tag",
|
| 1992 |
.oneline = "waits for the suspension of a request",
|
| 1993 |
}; |
| 1994 |
|
| 1995 |
static int abort_f(BlockDriverState *bs, int argc, char **argv) |
| 1996 |
{
|
| 1997 |
abort(); |
| 1998 |
} |
| 1999 |
|
| 2000 |
static const cmdinfo_t abort_cmd = { |
| 2001 |
.name = "abort",
|
| 2002 |
.cfunc = abort_f, |
| 2003 |
.flags = CMD_NOFILE_OK, |
| 2004 |
.oneline = "simulate a program crash using abort(3)",
|
| 2005 |
}; |
| 2006 |
|
| 2007 |
static void help_oneline(const char *cmd, const cmdinfo_t *ct) |
| 2008 |
{
|
| 2009 |
if (cmd) {
|
| 2010 |
printf("%s ", cmd);
|
| 2011 |
} else {
|
| 2012 |
printf("%s ", ct->name);
|
| 2013 |
if (ct->altname) {
|
| 2014 |
printf("(or %s) ", ct->altname);
|
| 2015 |
} |
| 2016 |
} |
| 2017 |
|
| 2018 |
if (ct->args) {
|
| 2019 |
printf("%s ", ct->args);
|
| 2020 |
} |
| 2021 |
printf("-- %s\n", ct->oneline);
|
| 2022 |
} |
| 2023 |
|
| 2024 |
static void help_onecmd(const char *cmd, const cmdinfo_t *ct) |
| 2025 |
{
|
| 2026 |
help_oneline(cmd, ct); |
| 2027 |
if (ct->help) {
|
| 2028 |
ct->help(); |
| 2029 |
} |
| 2030 |
} |
| 2031 |
|
| 2032 |
static void help_all(void) |
| 2033 |
{
|
| 2034 |
const cmdinfo_t *ct;
|
| 2035 |
|
| 2036 |
for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
|
| 2037 |
help_oneline(ct->name, ct); |
| 2038 |
} |
| 2039 |
printf("\nUse 'help commandname' for extended help.\n");
|
| 2040 |
} |
| 2041 |
|
| 2042 |
static int help_f(BlockDriverState *bs, int argc, char **argv) |
| 2043 |
{
|
| 2044 |
const cmdinfo_t *ct;
|
| 2045 |
|
| 2046 |
if (argc == 1) { |
| 2047 |
help_all(); |
| 2048 |
return 0; |
| 2049 |
} |
| 2050 |
|
| 2051 |
ct = find_command(argv[1]);
|
| 2052 |
if (ct == NULL) { |
| 2053 |
printf("command %s not found\n", argv[1]); |
| 2054 |
return 0; |
| 2055 |
} |
| 2056 |
|
| 2057 |
help_onecmd(argv[1], ct);
|
| 2058 |
return 0; |
| 2059 |
} |
| 2060 |
|
| 2061 |
static const cmdinfo_t help_cmd = { |
| 2062 |
.name = "help",
|
| 2063 |
.altname = "?",
|
| 2064 |
.cfunc = help_f, |
| 2065 |
.argmin = 0,
|
| 2066 |
.argmax = 1,
|
| 2067 |
.flags = CMD_FLAG_GLOBAL, |
| 2068 |
.args = "[command]",
|
| 2069 |
.oneline = "help for one or all commands",
|
| 2070 |
}; |
| 2071 |
|
| 2072 |
bool qemuio_command(BlockDriverState *bs, const char *cmd) |
| 2073 |
{
|
| 2074 |
char *input;
|
| 2075 |
const cmdinfo_t *ct;
|
| 2076 |
char **v;
|
| 2077 |
int c;
|
| 2078 |
bool done = false; |
| 2079 |
|
| 2080 |
input = g_strdup(cmd); |
| 2081 |
v = breakline(input, &c); |
| 2082 |
if (c) {
|
| 2083 |
ct = find_command(v[0]);
|
| 2084 |
if (ct) {
|
| 2085 |
done = command(bs, ct, c, v); |
| 2086 |
} else {
|
| 2087 |
fprintf(stderr, "command \"%s\" not found\n", v[0]); |
| 2088 |
} |
| 2089 |
} |
| 2090 |
g_free(input); |
| 2091 |
g_free(v); |
| 2092 |
|
| 2093 |
return done;
|
| 2094 |
} |
| 2095 |
|
| 2096 |
static void __attribute((constructor)) init_qemuio_commands(void) |
| 2097 |
{
|
| 2098 |
/* initialize commands */
|
| 2099 |
qemuio_add_command(&help_cmd); |
| 2100 |
qemuio_add_command(&read_cmd); |
| 2101 |
qemuio_add_command(&readv_cmd); |
| 2102 |
qemuio_add_command(&write_cmd); |
| 2103 |
qemuio_add_command(&writev_cmd); |
| 2104 |
qemuio_add_command(&multiwrite_cmd); |
| 2105 |
qemuio_add_command(&aio_read_cmd); |
| 2106 |
qemuio_add_command(&aio_write_cmd); |
| 2107 |
qemuio_add_command(&aio_flush_cmd); |
| 2108 |
qemuio_add_command(&flush_cmd); |
| 2109 |
qemuio_add_command(&truncate_cmd); |
| 2110 |
qemuio_add_command(&length_cmd); |
| 2111 |
qemuio_add_command(&info_cmd); |
| 2112 |
qemuio_add_command(&discard_cmd); |
| 2113 |
qemuio_add_command(&alloc_cmd); |
| 2114 |
qemuio_add_command(&map_cmd); |
| 2115 |
qemuio_add_command(&break_cmd); |
| 2116 |
qemuio_add_command(&resume_cmd); |
| 2117 |
qemuio_add_command(&wait_break_cmd); |
| 2118 |
qemuio_add_command(&abort_cmd); |
| 2119 |
} |