| /* |
| * Command line utility to exercise the QEMU I/O path. |
| * |
| * Copyright (C) 2009 Red Hat, Inc. |
| * Copyright (c) 2003-2005 Silicon Graphics, Inc. |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <getopt.h> |
| #include <libgen.h> |
| |
| #include "qemu-common.h" |
| #include "qemu/main-loop.h" |
| #include "block/block_int.h" |
| #include "cmd.h" |
| #include "trace/control.h" |
| |
| #define VERSION "0.0.1" |
| |
| #define CMD_NOFILE_OK 0x01 |
| |
| char *progname; |
| static BlockDriverState *bs; |
| |
| static int misalign; |
| |
| /* |
| * 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(size_t len, int pattern) |
| { |
| void *buf; |
| |
| if (misalign) { |
| len += MISALIGN_OFFSET; |
| } |
| buf = qemu_blockalign(bs, len); |
| memset(buf, pattern, len); |
| if (misalign) { |
| buf += MISALIGN_OFFSET; |
| } |
| return buf; |
| } |
| |
| static void qemu_io_free(void *p) |
| { |
| if (misalign) { |
| p -= MISALIGN_OFFSET; |
| } |
| qemu_vfree(p); |
| } |
| |
| static void dump_buffer(const void *buffer, int64_t offset, int len) |
| { |
| int i, 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 timeval *t, int64_t offset, |
| int count, int total, int cnt, int 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 %d/%d 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("%d,%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(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) { |
| printf("non-numeric length argument -- %s\n", arg); |
| goto fail; |
| } |
| |
| /* should be SIZE_T_MAX, but that doesn't exist */ |
| if (len > INT_MAX) { |
| printf("too large length argument -- %s\n", arg); |
| goto fail; |
| } |
| |
| if (len & 0x1ff) { |
| printf("length argument %" PRId64 |
| " is not sector aligned\n", len); |
| goto fail; |
| } |
| |
| sizes[i] = len; |
| count += len; |
| } |
| |
| qemu_iovec_init(qiov, nr_iov); |
| |
| buf = p = qemu_io_alloc(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_read(char *buf, int64_t offset, int count, int *total) |
| { |
| int ret; |
| |
| ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = count; |
| return 1; |
| } |
| |
| static int do_write(char *buf, int64_t offset, int count, int *total) |
| { |
| int ret; |
| |
| ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = count; |
| return 1; |
| } |
| |
| static int do_pread(char *buf, int64_t offset, int count, int *total) |
| { |
| *total = bdrv_pread(bs, offset, (uint8_t *)buf, count); |
| if (*total < 0) { |
| return *total; |
| } |
| return 1; |
| } |
| |
| static int do_pwrite(char *buf, int64_t offset, int count, int *total) |
| { |
| *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count); |
| if (*total < 0) { |
| return *total; |
| } |
| return 1; |
| } |
| |
| typedef struct { |
| int64_t offset; |
| int count; |
| int *total; |
| int ret; |
| bool done; |
| } CoWriteZeroes; |
| |
| static void coroutine_fn co_write_zeroes_entry(void *opaque) |
| { |
| CoWriteZeroes *data = opaque; |
| |
| data->ret = bdrv_co_write_zeroes(bs, data->offset / BDRV_SECTOR_SIZE, |
| data->count / BDRV_SECTOR_SIZE); |
| data->done = true; |
| if (data->ret < 0) { |
| *data->total = data->ret; |
| return; |
| } |
| |
| *data->total = data->count; |
| } |
| |
| static int do_co_write_zeroes(int64_t offset, int count, int *total) |
| { |
| Coroutine *co; |
| CoWriteZeroes data = { |
| .offset = offset, |
| .count = count, |
| .total = total, |
| .done = false, |
| }; |
| |
| co = qemu_coroutine_create(co_write_zeroes_entry); |
| qemu_coroutine_enter(co, &data); |
| while (!data.done) { |
| qemu_aio_wait(); |
| } |
| if (data.ret < 0) { |
| return data.ret; |
| } else { |
| return 1; |
| } |
| } |
| |
| static int do_write_compressed(char *buf, int64_t offset, int count, int *total) |
| { |
| int ret; |
| |
| ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9); |
| if (ret < 0) { |
| return ret; |
| } |
| *total = count; |
| return 1; |
| } |
| |
| static int do_load_vmstate(char *buf, int64_t offset, int count, int *total) |
| { |
| *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count); |
| if (*total < 0) { |
| return *total; |
| } |
| return 1; |
| } |
| |
| static int do_save_vmstate(char *buf, int64_t offset, int count, int *total) |
| { |
| *total = bdrv_save_vmstate(bs, (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(QEMUIOVector *qiov, int64_t offset, int *total) |
| { |
| int async_ret = NOT_DONE; |
| |
| bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9, |
| 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(QEMUIOVector *qiov, int64_t offset, int *total) |
| { |
| int async_ret = NOT_DONE; |
| |
| bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9, |
| aio_rw_done, &async_ret); |
| while (async_ret == NOT_DONE) { |
| main_loop_wait(false); |
| } |
| |
| *total = qiov->size; |
| return async_ret < 0 ? async_ret : 1; |
| } |
| |
| struct multiwrite_async_ret { |
| int num_done; |
| int error; |
| }; |
| |
| static void multiwrite_cb(void *opaque, int ret) |
| { |
| struct multiwrite_async_ret *async_ret = opaque; |
| |
| async_ret->num_done++; |
| if (ret < 0) { |
| async_ret->error = ret; |
| } |
| } |
| |
| static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total) |
| { |
| int i, ret; |
| struct multiwrite_async_ret async_ret = { |
| .num_done = 0, |
| .error = 0, |
| }; |
| |
| *total = 0; |
| for (i = 0; i < num_reqs; i++) { |
| reqs[i].cb = multiwrite_cb; |
| reqs[i].opaque = &async_ret; |
| *total += reqs[i].qiov->size; |
| } |
| |
| ret = bdrv_aio_multiwrite(bs, reqs, num_reqs); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| while (async_ret.num_done < num_reqs) { |
| main_loop_wait(false); |
| } |
| |
| return async_ret.error < 0 ? async_ret.error : 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, -- use bdrv_pread to read the file\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(int argc, char **argv); |
| |
| static const cmdinfo_t read_cmd = { |
| .name = "read", |
| .altname = "r", |
| .cfunc = read_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-abCpqv] [-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(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, pflag = 0, qflag = 0, vflag = 0; |
| int Pflag = 0, sflag = 0, lflag = 0, bflag = 0; |
| int c, cnt; |
| char *buf; |
| int64_t offset; |
| int count; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int total = 0; |
| int pattern = 0, pattern_offset = 0, pattern_count = 0; |
| |
| while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) { |
| switch (c) { |
| case 'b': |
| bflag = 1; |
| break; |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'l': |
| lflag = 1; |
| pattern_count = cvtnum(optarg); |
| if (pattern_count < 0) { |
| printf("non-numeric length argument -- %s\n", optarg); |
| return 0; |
| } |
| break; |
| case 'p': |
| pflag = 1; |
| break; |
| case 'P': |
| Pflag = 1; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return 0; |
| } |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| case 's': |
| sflag = 1; |
| pattern_offset = cvtnum(optarg); |
| if (pattern_offset < 0) { |
| printf("non-numeric length argument -- %s\n", optarg); |
| return 0; |
| } |
| break; |
| case 'v': |
| vflag = 1; |
| break; |
| default: |
| return command_usage(&read_cmd); |
| } |
| } |
| |
| if (optind != argc - 2) { |
| return command_usage(&read_cmd); |
| } |
| |
| if (bflag && pflag) { |
| printf("-b and -p cannot be specified at the same time\n"); |
| return 0; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| optind++; |
| count = cvtnum(argv[optind]); |
| if (count < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| if (!Pflag && (lflag || sflag)) { |
| return command_usage(&read_cmd); |
| } |
| |
| 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 0; |
| } |
| |
| if (!pflag) { |
| if (offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| offset); |
| return 0; |
| } |
| if (count & 0x1ff) { |
| printf("count %d is not sector aligned\n", |
| count); |
| return 0; |
| } |
| } |
| |
| buf = qemu_io_alloc(count, 0xab); |
| |
| gettimeofday(&t1, NULL); |
| if (pflag) { |
| cnt = do_pread(buf, offset, count, &total); |
| } else if (bflag) { |
| cnt = do_load_vmstate(buf, offset, count, &total); |
| } else { |
| cnt = do_read(buf, offset, count, &total); |
| } |
| gettimeofday(&t2, NULL); |
| |
| if (cnt < 0) { |
| printf("read failed: %s\n", strerror(-cnt)); |
| goto out; |
| } |
| |
| 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 ", %d bytes\n", |
| offset + pattern_offset, pattern_count); |
| } |
| 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 0; |
| } |
| |
| 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(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(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, qflag = 0, vflag = 0; |
| int c, cnt; |
| 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; |
| int Pflag = 0; |
| |
| while ((c = getopt(argc, argv, "CP:qv")) != EOF) { |
| switch (c) { |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'P': |
| Pflag = 1; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return 0; |
| } |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| case 'v': |
| vflag = 1; |
| break; |
| default: |
| return command_usage(&readv_cmd); |
| } |
| } |
| |
| if (optind > argc - 2) { |
| return command_usage(&readv_cmd); |
| } |
| |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| optind++; |
| |
| if (offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| offset); |
| return 0; |
| } |
| |
| nr_iov = argc - optind; |
| buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab); |
| if (buf == NULL) { |
| return 0; |
| } |
| |
| gettimeofday(&t1, NULL); |
| cnt = do_aio_readv(&qiov, offset, &total); |
| gettimeofday(&t2, NULL); |
| |
| if (cnt < 0) { |
| printf("readv failed: %s\n", strerror(-cnt)); |
| goto out; |
| } |
| |
| 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 ", %zd bytes\n", offset, qiov.size); |
| } |
| 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 0; |
| } |
| |
| 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 bdrv_write_compressed\n" |
| " -p, -- use bdrv_pwrite to write the file\n" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| " -z, -- write zeroes using bdrv_co_write_zeroes\n" |
| "\n"); |
| } |
| |
| static int write_f(int argc, char **argv); |
| |
| static const cmdinfo_t write_cmd = { |
| .name = "write", |
| .altname = "w", |
| .cfunc = write_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-bcCpqz] [-P pattern ] off len", |
| .oneline = "writes a number of bytes at a specified offset", |
| .help = write_help, |
| }; |
| |
| static int write_f(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0; |
| int cflag = 0; |
| int c, cnt; |
| char *buf = NULL; |
| int64_t offset; |
| int count; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int total = 0; |
| int pattern = 0xcd; |
| |
| while ((c = getopt(argc, argv, "bcCpP:qz")) != EOF) { |
| switch (c) { |
| case 'b': |
| bflag = 1; |
| break; |
| case 'c': |
| cflag = 1; |
| break; |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'p': |
| pflag = 1; |
| break; |
| case 'P': |
| Pflag = 1; |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return 0; |
| } |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| case 'z': |
| zflag = 1; |
| break; |
| default: |
| return command_usage(&write_cmd); |
| } |
| } |
| |
| if (optind != argc - 2) { |
| return command_usage(&write_cmd); |
| } |
| |
| if (bflag + pflag + zflag > 1) { |
| printf("-b, -p, or -z cannot be specified at the same time\n"); |
| return 0; |
| } |
| |
| if (zflag && Pflag) { |
| printf("-z and -P cannot be specified at the same time\n"); |
| return 0; |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| optind++; |
| count = cvtnum(argv[optind]); |
| if (count < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| if (!pflag) { |
| if (offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| offset); |
| return 0; |
| } |
| |
| if (count & 0x1ff) { |
| printf("count %d is not sector aligned\n", |
| count); |
| return 0; |
| } |
| } |
| |
| if (!zflag) { |
| buf = qemu_io_alloc(count, pattern); |
| } |
| |
| gettimeofday(&t1, NULL); |
| if (pflag) { |
| cnt = do_pwrite(buf, offset, count, &total); |
| } else if (bflag) { |
| cnt = do_save_vmstate(buf, offset, count, &total); |
| } else if (zflag) { |
| cnt = do_co_write_zeroes(offset, count, &total); |
| } else if (cflag) { |
| cnt = do_write_compressed(buf, offset, count, &total); |
| } else { |
| cnt = do_write(buf, offset, count, &total); |
| } |
| gettimeofday(&t2, NULL); |
| |
| if (cnt < 0) { |
| printf("write failed: %s\n", strerror(-cnt)); |
| goto out; |
| } |
| |
| 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 0; |
| } |
| |
| static void |
| writev_help(void) |
| { |
| printf( |
| "\n" |
| " writes a range of bytes from the given offset source from multiple buffers\n" |
| "\n" |
| " Example:\n" |
| " '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" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int writev_f(int argc, char **argv); |
| |
| static const cmdinfo_t writev_cmd = { |
| .name = "writev", |
| .cfunc = writev_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cq] [-P pattern ] off len [len..]", |
| .oneline = "writes a number of bytes at a specified offset", |
| .help = writev_help, |
| }; |
| |
| static int writev_f(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, qflag = 0; |
| int c, cnt; |
| 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, "CqP:")) != EOF) { |
| switch (c) { |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| case 'P': |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return 0; |
| } |
| break; |
| default: |
| return command_usage(&writev_cmd); |
| } |
| } |
| |
| if (optind > argc - 2) { |
| return command_usage(&writev_cmd); |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| optind++; |
| |
| if (offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| offset); |
| return 0; |
| } |
| |
| nr_iov = argc - optind; |
| buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern); |
| if (buf == NULL) { |
| return 0; |
| } |
| |
| gettimeofday(&t1, NULL); |
| cnt = do_aio_writev(&qiov, offset, &total); |
| gettimeofday(&t2, NULL); |
| |
| if (cnt < 0) { |
| printf("writev failed: %s\n", strerror(-cnt)); |
| goto out; |
| } |
| |
| 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 0; |
| } |
| |
| static void multiwrite_help(void) |
| { |
| printf( |
| "\n" |
| " writes a range of bytes from the given offset source from multiple buffers,\n" |
| " in a batch of requests that may be merged by qemu\n" |
| "\n" |
| " Example:\n" |
| " 'multiwrite 512 1k 1k ; 4k 1k'\n" |
| " writes 2 kB at 512 bytes and 1 kB at 4 kB 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). The pattern byte is increased\n" |
| " by one for each request contained in the multiwrite command.\n" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int multiwrite_f(int argc, char **argv); |
| |
| static const cmdinfo_t multiwrite_cmd = { |
| .name = "multiwrite", |
| .cfunc = multiwrite_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]", |
| .oneline = "issues multiple write requests at once", |
| .help = multiwrite_help, |
| }; |
| |
| static int multiwrite_f(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, qflag = 0; |
| int c, cnt; |
| char **buf; |
| int64_t offset, first_offset = 0; |
| /* Some compilers get confused and warn if this is not initialized. */ |
| int total = 0; |
| int nr_iov; |
| int nr_reqs; |
| int pattern = 0xcd; |
| QEMUIOVector *qiovs; |
| int i; |
| BlockRequest *reqs; |
| |
| while ((c = getopt(argc, argv, "CqP:")) != EOF) { |
| switch (c) { |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| case 'P': |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| return 0; |
| } |
| break; |
| default: |
| return command_usage(&writev_cmd); |
| } |
| } |
| |
| if (optind > argc - 2) { |
| return command_usage(&writev_cmd); |
| } |
| |
| nr_reqs = 1; |
| for (i = optind; i < argc; i++) { |
| if (!strcmp(argv[i], ";")) { |
| nr_reqs++; |
| } |
| } |
| |
| reqs = g_malloc0(nr_reqs * sizeof(*reqs)); |
| buf = g_malloc0(nr_reqs * sizeof(*buf)); |
| qiovs = g_malloc(nr_reqs * sizeof(*qiovs)); |
| |
| for (i = 0; i < nr_reqs && optind < argc; i++) { |
| int j; |
| |
| /* Read the offset of the request */ |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric offset argument -- %s\n", argv[optind]); |
| goto out; |
| } |
| optind++; |
| |
| if (offset & 0x1ff) { |
| printf("offset %lld is not sector aligned\n", |
| (long long)offset); |
| goto out; |
| } |
| |
| if (i == 0) { |
| first_offset = offset; |
| } |
| |
| /* Read lengths for qiov entries */ |
| for (j = optind; j < argc; j++) { |
| if (!strcmp(argv[j], ";")) { |
| break; |
| } |
| } |
| |
| nr_iov = j - optind; |
| |
| /* Build request */ |
| buf[i] = create_iovec(&qiovs[i], &argv[optind], nr_iov, pattern); |
| if (buf[i] == NULL) { |
| goto out; |
| } |
| |
| reqs[i].qiov = &qiovs[i]; |
| reqs[i].sector = offset >> 9; |
| reqs[i].nb_sectors = reqs[i].qiov->size >> 9; |
| |
| optind = j + 1; |
| |
| pattern++; |
| } |
| |
| /* If there were empty requests at the end, ignore them */ |
| nr_reqs = i; |
| |
| gettimeofday(&t1, NULL); |
| cnt = do_aio_multiwrite(reqs, nr_reqs, &total); |
| gettimeofday(&t2, NULL); |
| |
| if (cnt < 0) { |
| printf("aio_multiwrite failed: %s\n", strerror(-cnt)); |
| goto out; |
| } |
| |
| if (qflag) { |
| goto out; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| t2 = tsub(t2, t1); |
| print_report("wrote", &t2, first_offset, total, total, cnt, Cflag); |
| out: |
| for (i = 0; i < nr_reqs; i++) { |
| qemu_io_free(buf[i]); |
| if (reqs[i].qiov != NULL) { |
| qemu_iovec_destroy(&qiovs[i]); |
| } |
| } |
| g_free(buf); |
| g_free(reqs); |
| g_free(qiovs); |
| return 0; |
| } |
| |
| struct aio_ctx { |
| QEMUIOVector qiov; |
| int64_t offset; |
| char *buf; |
| int qflag; |
| int vflag; |
| int Cflag; |
| int Pflag; |
| int pattern; |
| struct timeval t1; |
| }; |
| |
| static void aio_write_done(void *opaque, int ret) |
| { |
| struct aio_ctx *ctx = opaque; |
| struct timeval t2; |
| |
| gettimeofday(&t2, NULL); |
| |
| |
| if (ret < 0) { |
| printf("aio_write failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| |
| 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: |
| 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 timeval t2; |
| |
| gettimeofday(&t2, NULL); |
| |
| if (ret < 0) { |
| printf("readv failed: %s\n", strerror(-ret)); |
| 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 ", %zd bytes\n", ctx->offset, ctx->qiov.size); |
| } |
| g_free(cmp_buf); |
| } |
| |
| 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" |
| " -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 aio_read_f(int argc, char **argv); |
| |
| static const cmdinfo_t aio_read_cmd = { |
| .name = "aio_read", |
| .cfunc = aio_read_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cqv] [-P pattern ] off len [len..]", |
| .oneline = "asynchronously reads a number of bytes", |
| .help = aio_read_help, |
| }; |
| |
| static int aio_read_f(int argc, char **argv) |
| { |
| int nr_iov, c; |
| struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| |
| while ((c = getopt(argc, argv, "CP:qv")) != EOF) { |
| switch (c) { |
| case 'C': |
| ctx->Cflag = 1; |
| break; |
| case 'P': |
| ctx->Pflag = 1; |
| ctx->pattern = parse_pattern(optarg); |
| if (ctx->pattern < 0) { |
| g_free(ctx); |
| return 0; |
| } |
| break; |
| case 'q': |
| ctx->qflag = 1; |
| break; |
| case 'v': |
| ctx->vflag = 1; |
| break; |
| default: |
| g_free(ctx); |
| return command_usage(&aio_read_cmd); |
| } |
| } |
| |
| if (optind > argc - 2) { |
| g_free(ctx); |
| return command_usage(&aio_read_cmd); |
| } |
| |
| ctx->offset = cvtnum(argv[optind]); |
| if (ctx->offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| g_free(ctx); |
| return 0; |
| } |
| optind++; |
| |
| if (ctx->offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| ctx->offset); |
| g_free(ctx); |
| return 0; |
| } |
| |
| nr_iov = argc - optind; |
| ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab); |
| if (ctx->buf == NULL) { |
| g_free(ctx); |
| return 0; |
| } |
| |
| gettimeofday(&ctx->t1, NULL); |
| bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov, |
| ctx->qiov.size >> 9, 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" |
| " -P, -- use different pattern to fill file\n" |
| " -C, -- report statistics in a machine parsable format\n" |
| " -q, -- quiet mode, do not show I/O statistics\n" |
| "\n"); |
| } |
| |
| static int aio_write_f(int argc, char **argv); |
| |
| static const cmdinfo_t aio_write_cmd = { |
| .name = "aio_write", |
| .cfunc = aio_write_f, |
| .argmin = 2, |
| .argmax = -1, |
| .args = "[-Cq] [-P pattern ] off len [len..]", |
| .oneline = "asynchronously writes a number of bytes", |
| .help = aio_write_help, |
| }; |
| |
| static int aio_write_f(int argc, char **argv) |
| { |
| int nr_iov, c; |
| int pattern = 0xcd; |
| struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); |
| |
| while ((c = getopt(argc, argv, "CqP:")) != EOF) { |
| switch (c) { |
| case 'C': |
| ctx->Cflag = 1; |
| break; |
| case 'q': |
| ctx->qflag = 1; |
| break; |
| case 'P': |
| pattern = parse_pattern(optarg); |
| if (pattern < 0) { |
| g_free(ctx); |
| return 0; |
| } |
| break; |
| default: |
| g_free(ctx); |
| return command_usage(&aio_write_cmd); |
| } |
| } |
| |
| if (optind > argc - 2) { |
| g_free(ctx); |
| return command_usage(&aio_write_cmd); |
| } |
| |
| ctx->offset = cvtnum(argv[optind]); |
| if (ctx->offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| g_free(ctx); |
| return 0; |
| } |
| optind++; |
| |
| if (ctx->offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| ctx->offset); |
| g_free(ctx); |
| return 0; |
| } |
| |
| nr_iov = argc - optind; |
| ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern); |
| if (ctx->buf == NULL) { |
| g_free(ctx); |
| return 0; |
| } |
| |
| gettimeofday(&ctx->t1, NULL); |
| bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov, |
| ctx->qiov.size >> 9, aio_write_done, ctx); |
| return 0; |
| } |
| |
| static int aio_flush_f(int argc, char **argv) |
| { |
| bdrv_drain_all(); |
| 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(int argc, char **argv) |
| { |
| bdrv_flush(bs); |
| return 0; |
| } |
| |
| 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(int argc, char **argv) |
| { |
| int64_t offset; |
| int ret; |
| |
| offset = cvtnum(argv[1]); |
| if (offset < 0) { |
| printf("non-numeric truncate argument -- %s\n", argv[1]); |
| return 0; |
| } |
| |
| ret = bdrv_truncate(bs, offset); |
| if (ret < 0) { |
| printf("truncate: %s\n", strerror(-ret)); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static const cmdinfo_t truncate_cmd = { |
| .name = "truncate", |
| .altname = "t", |
| .cfunc = truncate_f, |
| .argmin = 1, |
| .argmax = 1, |
| .args = "off", |
| .oneline = "truncates the current file at the given offset", |
| }; |
| |
| static int length_f(int argc, char **argv) |
| { |
| int64_t size; |
| char s1[64]; |
| |
| size = bdrv_getlength(bs); |
| if (size < 0) { |
| printf("getlength: %s\n", strerror(-size)); |
| return 0; |
| } |
| |
| 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(int argc, char **argv) |
| { |
| BlockDriverInfo bdi; |
| 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 0; |
| } |
| |
| 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); |
| |
| 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(int argc, char **argv); |
| |
| static const cmdinfo_t discard_cmd = { |
| .name = "discard", |
| .altname = "d", |
| .cfunc = discard_f, |
| .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(int argc, char **argv) |
| { |
| struct timeval t1, t2; |
| int Cflag = 0, qflag = 0; |
| int c, ret; |
| int64_t offset; |
| int count; |
| |
| while ((c = getopt(argc, argv, "Cq")) != EOF) { |
| switch (c) { |
| case 'C': |
| Cflag = 1; |
| break; |
| case 'q': |
| qflag = 1; |
| break; |
| default: |
| return command_usage(&discard_cmd); |
| } |
| } |
| |
| if (optind != argc - 2) { |
| return command_usage(&discard_cmd); |
| } |
| |
| offset = cvtnum(argv[optind]); |
| if (offset < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| optind++; |
| count = cvtnum(argv[optind]); |
| if (count < 0) { |
| printf("non-numeric length argument -- %s\n", argv[optind]); |
| return 0; |
| } |
| |
| gettimeofday(&t1, NULL); |
| ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS, |
| count >> BDRV_SECTOR_BITS); |
| gettimeofday(&t2, NULL); |
| |
| if (ret < 0) { |
| printf("discard failed: %s\n", strerror(-ret)); |
| goto out; |
| } |
| |
| /* Finally, report back -- -C gives a parsable format */ |
| if (!qflag) { |
| t2 = tsub(t2, t1); |
| print_report("discard", &t2, offset, count, count, 1, Cflag); |
| } |
| |
| out: |
| return 0; |
| } |
| |
| static int alloc_f(int argc, char **argv) |
| { |
| int64_t offset, sector_num; |
| int nb_sectors, remaining; |
| char s1[64]; |
| int num, sum_alloc; |
| int ret; |
| |
| offset = cvtnum(argv[1]); |
| if (offset & 0x1ff) { |
| printf("offset %" PRId64 " is not sector aligned\n", |
| offset); |
| return 0; |
| } |
| |
| if (argc == 3) { |
| nb_sectors = cvtnum(argv[2]); |
| } else { |
| nb_sectors = 1; |
| } |
| |
| remaining = nb_sectors; |
| sum_alloc = 0; |
| sector_num = offset >> 9; |
| while (remaining) { |
| ret = bdrv_is_allocated(bs, sector_num, remaining, &num); |
| sector_num += num; |
| remaining -= num; |
| if (ret) { |
| sum_alloc += num; |
| } |
| if (num == 0) { |
| nb_sectors -= remaining; |
| remaining = 0; |
| } |
| } |
| |
| cvtstr(offset, s1, sizeof(s1)); |
| |
| printf("%d/%d sectors allocated at offset %s\n", |
| sum_alloc, nb_sectors, s1); |
| return 0; |
| } |
| |
| static const cmdinfo_t alloc_cmd = { |
| .name = "alloc", |
| .altname = "a", |
| .argmin = 1, |
| .argmax = 2, |
| .cfunc = alloc_f, |
| .args = "off [sectors]", |
| .oneline = "checks if a sector is present in the file", |
| }; |
| |
| static int map_f(int argc, char **argv) |
| { |
| int64_t offset; |
| int64_t nb_sectors; |
| char s1[64]; |
| int num, num_checked; |
| int ret; |
| const char *retstr; |
| |
| offset = 0; |
| nb_sectors = bs->total_sectors; |
| |
| do { |
| num_checked = MIN(nb_sectors, INT_MAX); |
| ret = bdrv_is_allocated(bs, offset, num_checked, &num); |
| retstr = ret ? " allocated" : "not allocated"; |
| cvtstr(offset << 9ULL, s1, sizeof(s1)); |
| printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n", |
| offset << 9ULL, num, num_checked, retstr, s1, ret); |
| |
| offset += num; |
| nb_sectors -= num; |
| } while (offset < bs->total_sectors); |
| |
| 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 int break_f(int argc, char **argv) |
| { |
| int ret; |
| |
| ret = bdrv_debug_breakpoint(bs, argv[1], argv[2]); |
| if (ret < 0) { |
| printf("Could not set breakpoint: %s\n", strerror(-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 int resume_f(int argc, char **argv) |
| { |
| int ret; |
| |
| ret = bdrv_debug_resume(bs, argv[1]); |
| if (ret < 0) { |
| printf("Could not resume request: %s\n", strerror(-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(int argc, char **argv) |
| { |
| while (!bdrv_debug_is_suspended(bs, argv[1])) { |
| qemu_aio_wait(); |
| } |
| |
| 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(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 int close_f(int argc, char **argv) |
| { |
| bdrv_delete(bs); |
| bs = NULL; |
| return 0; |
| } |
| |
| static const cmdinfo_t close_cmd = { |
| .name = "close", |
| .altname = "c", |
| .cfunc = close_f, |
| .oneline = "close the current open file", |
| }; |
| |
| static int openfile(char *name, int flags, int growable) |
| { |
| if (bs) { |
| fprintf(stderr, "file open already, try 'help close'\n"); |
| return 1; |
| } |
| |
| if (growable) { |
| if (bdrv_file_open(&bs, name, flags)) { |
| fprintf(stderr, "%s: can't open device %s\n", progname, name); |
| return 1; |
| } |
| } else { |
| bs = bdrv_new("hda"); |
| |
| if (bdrv_open(bs, name, NULL, flags, NULL) < 0) { |
| fprintf(stderr, "%s: can't open device %s\n", progname, name); |
| bdrv_delete(bs); |
| bs = NULL; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void open_help(void) |
| { |
| printf( |
| "\n" |
| " opens a new file in the requested mode\n" |
| "\n" |
| " Example:\n" |
| " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n" |
| "\n" |
| " Opens a file for subsequent use by all of the other qemu-io commands.\n" |
| " -r, -- open file read-only\n" |
| " -s, -- use snapshot file\n" |
| " -n, -- disable host cache\n" |
| " -g, -- allow file to grow (only applies to protocols)" |
| "\n"); |
| } |
| |
| static int open_f(int argc, char **argv); |
| |
| static const cmdinfo_t open_cmd = { |
| .name = "open", |
| .altname = "o", |
| .cfunc = open_f, |
| .argmin = 1, |
| .argmax = -1, |
| .flags = CMD_NOFILE_OK, |
| .args = "[-Crsn] [path]", |
| .oneline = "open the file specified by path", |
| .help = open_help, |
| }; |
| |
| static int open_f(int argc, char **argv) |
| { |
| int flags = 0; |
| int readonly = 0; |
| int growable = 0; |
| int c; |
| |
| while ((c = getopt(argc, argv, "snrg")) != EOF) { |
| switch (c) { |
| case 's': |
| flags |= BDRV_O_SNAPSHOT; |
| break; |
| case 'n': |
| flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; |
| break; |
| case 'r': |
| readonly = 1; |
| break; |
| case 'g': |
| growable = 1; |
| break; |
| default: |
| return command_usage(&open_cmd); |
| } |
| } |
| |
| if (!readonly) { |
| flags |= BDRV_O_RDWR; |
| } |
| |
| if (optind != argc - 1) { |
| return command_usage(&open_cmd); |
| } |
| |
| return openfile(argv[optind], flags, growable); |
| } |
| |
| static int init_args_command(int index) |
| { |
| /* only one device allowed so far */ |
| if (index >= 1) { |
| return 0; |
| } |
| return ++index; |
| } |
| |
| static int init_check_command(const cmdinfo_t *ct) |
| { |
| if (ct->flags & CMD_FLAG_GLOBAL) { |
| return 1; |
| } |
| if (!(ct->flags & CMD_NOFILE_OK) && !bs) { |
| fprintf(stderr, "no file open, try 'help open'\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static void usage(const char *name) |
| { |
| printf( |
| "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n" |
| "QEMU Disk exerciser\n" |
| "\n" |
| " -c, --cmd command to execute\n" |
| " -r, --read-only export read-only\n" |
| " -s, --snapshot use snapshot file\n" |
| " -n, --nocache disable host cache\n" |
| " -g, --growable allow file to grow (only applies to protocols)\n" |
| " -m, --misalign misalign allocations for O_DIRECT\n" |
| " -k, --native-aio use kernel AIO implementation (on Linux only)\n" |
| " -t, --cache=MODE use the given cache mode for the image\n" |
| " -T, --trace FILE enable trace events listed in the given file\n" |
| " -h, --help display this help and exit\n" |
| " -V, --version output version information and exit\n" |
| "\n", |
| name); |
| } |
| |
| |
| int main(int argc, char **argv) |
| { |
| int readonly = 0; |
| int growable = 0; |
| const char *sopt = "hVc:d:rsnmgkt:T:"; |
| const struct option lopt[] = { |
| { "help", 0, NULL, 'h' }, |
| { "version", 0, NULL, 'V' }, |
| { "offset", 1, NULL, 'o' }, |
| { "cmd", 1, NULL, 'c' }, |
| { "read-only", 0, NULL, 'r' }, |
| { "snapshot", 0, NULL, 's' }, |
| { "nocache", 0, NULL, 'n' }, |
| { "misalign", 0, NULL, 'm' }, |
| { "growable", 0, NULL, 'g' }, |
| { "native-aio", 0, NULL, 'k' }, |
| { "discard", 1, NULL, 'd' }, |
| { "cache", 1, NULL, 't' }, |
| { "trace", 1, NULL, 'T' }, |
| { NULL, 0, NULL, 0 } |
| }; |
| int c; |
| int opt_index = 0; |
| int flags = BDRV_O_UNMAP; |
| |
| progname = basename(argv[0]); |
| |
| while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { |
| switch (c) { |
| case 's': |
| flags |= BDRV_O_SNAPSHOT; |
| break; |
| case 'n': |
| flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; |
| break; |
| case 'd': |
| if (bdrv_parse_discard_flags(optarg, &flags) < 0) { |
| error_report("Invalid discard option: %s", optarg); |
| exit(1); |
| } |
| break; |
| case 'c': |
| add_user_command(optarg); |
| break; |
| case 'r': |
| readonly = 1; |
| break; |
| case 'm': |
| misalign = 1; |
| break; |
| case 'g': |
| growable = 1; |
| break; |
| case 'k': |
| flags |= BDRV_O_NATIVE_AIO; |
| break; |
| case 't': |
| if (bdrv_parse_cache_flags(optarg, &flags) < 0) { |
| error_report("Invalid cache option: %s", optarg); |
| exit(1); |
| } |
| break; |
| case 'T': |
| if (!trace_backend_init(optarg, NULL)) { |
| exit(1); /* error message will have been printed */ |
| } |
| break; |
| case 'V': |
| printf("%s version %s\n", progname, VERSION); |
| exit(0); |
| case 'h': |
| usage(progname); |
| exit(0); |
| default: |
| usage(progname); |
| exit(1); |
| } |
| } |
| |
| if ((argc - optind) > 1) { |
| usage(progname); |
| exit(1); |
| } |
| |
| qemu_init_main_loop(); |
| bdrv_init(); |
| |
| /* initialize commands */ |
| quit_init(); |
| help_init(); |
| add_command(&open_cmd); |
| add_command(&close_cmd); |
| add_command(&read_cmd); |
| add_command(&readv_cmd); |
| add_command(&write_cmd); |
| add_command(&writev_cmd); |
| add_command(&multiwrite_cmd); |
| add_command(&aio_read_cmd); |
| add_command(&aio_write_cmd); |
| add_command(&aio_flush_cmd); |
| add_command(&flush_cmd); |
| add_command(&truncate_cmd); |
| add_command(&length_cmd); |
| add_command(&info_cmd); |
| add_command(&discard_cmd); |
| add_command(&alloc_cmd); |
| add_command(&map_cmd); |
| add_command(&break_cmd); |
| add_command(&resume_cmd); |
| add_command(&wait_break_cmd); |
| add_command(&abort_cmd); |
| |
| add_args_command(init_args_command); |
| add_check_command(init_check_command); |
| |
| /* open the device */ |
| if (!readonly) { |
| flags |= BDRV_O_RDWR; |
| } |
| |
| if ((argc - optind) == 1) { |
| openfile(argv[optind], flags, growable); |
| } |
| command_loop(); |
| |
| /* |
| * Make sure all outstanding requests complete before the program exits. |
| */ |
| bdrv_drain_all(); |
| |
| if (bs) { |
| bdrv_delete(bs); |
| } |
| return 0; |
| } |