diff options
Diffstat (limited to 'qemu-io.c')
| -rw-r--r-- | qemu-io.c | 1817 |
1 files changed, 2 insertions, 1815 deletions
@@ -27,1786 +27,7 @@ char *progname; BlockDriverState *qemuio_bs; -static int misalign; - -static int64_t cvtnum(const char *s) -{ - char *end; - return strtosz_suffix(s, &end, STRTOSZ_DEFSUFFIX_B); -} - -/* - * 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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 { - BlockDriverState *bs; - 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(data->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(BlockDriverState *bs, int64_t offset, int count, - int *total) -{ - Coroutine *co; - CoWriteZeroes data = { - .bs = bs, - .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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, count, 0xab); - - gettimeofday(&t1, NULL); - if (pflag) { - cnt = do_pread(bs, buf, offset, count, &total); - } else if (bflag) { - cnt = do_load_vmstate(bs, buf, offset, count, &total); - } else { - cnt = do_read(bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, &qiov, &argv[optind], nr_iov, 0xab); - if (buf == NULL) { - return 0; - } - - gettimeofday(&t1, NULL); - cnt = do_aio_readv(bs, &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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, count, pattern); - } - - gettimeofday(&t1, NULL); - if (pflag) { - cnt = do_pwrite(bs, buf, offset, count, &total); - } else if (bflag) { - cnt = do_save_vmstate(bs, buf, offset, count, &total); - } else if (zflag) { - cnt = do_co_write_zeroes(bs, offset, count, &total); - } else if (cflag) { - cnt = do_write_compressed(bs, buf, offset, count, &total); - } else { - cnt = do_write(bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, &qiov, &argv[optind], nr_iov, pattern); - if (buf == NULL) { - return 0; - } - - gettimeofday(&t1, NULL); - cnt = do_aio_writev(bs, &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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, &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(bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, &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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(bs, &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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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 < 0) { - printf("non-numeric offset argument -- %s\n", argv[1]); - return 0; - } else if (offset & 0x1ff) { - printf("offset %" PRId64 " is not sector aligned\n", - offset); - return 0; - } - - if (argc == 3) { - nb_sectors = cvtnum(argv[2]); - if (nb_sectors < 0) { - printf("non-numeric length argument -- %s\n", argv[2]); - return 0; - } - } 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_is_allocated(BlockDriverState *bs, int64_t sector_num, - int64_t nb_sectors, int64_t *pnum) -{ - int num, num_checked; - int ret, firstret; - - num_checked = MIN(nb_sectors, INT_MAX); - ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); - if (ret < 0) { - return ret; - } - - firstret = ret; - *pnum = num; - - while (nb_sectors > 0 && ret == firstret) { - sector_num += num; - nb_sectors -= num; - - num_checked = MIN(nb_sectors, INT_MAX); - ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); - if (ret == firstret) { - *pnum += num; - } else { - break; - } - } - - return firstret; -} - -static int map_f(BlockDriverState *bs, int argc, char **argv) -{ - int64_t offset; - int64_t nb_sectors; - char s1[64]; - int64_t num; - int ret; - const char *retstr; - - offset = 0; - nb_sectors = bs->total_sectors; - - do { - ret = map_is_allocated(bs, offset, nb_sectors, &num); - if (ret < 0) { - error_report("Failed to get allocation status: %s", strerror(-ret)); - return 0; - } - - retstr = ret ? " allocated" : "not allocated"; - cvtstr(offset << 9ULL, s1, sizeof(s1)); - printf("[% 24" PRId64 "] % 8" PRId64 "/% 8" PRId64 " sectors %s " - "at offset %s (%d)\n", - offset << 9ULL, num, nb_sectors, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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(BlockDriverState *bs, 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)", -}; +extern int qemuio_misalign; static int close_f(BlockDriverState *bs, int argc, char **argv) { @@ -1916,18 +137,6 @@ static int open_f(BlockDriverState *bs, int argc, char **argv) return openfile(argv[optind], flags, growable); } -static int init_check_command(BlockDriverState *bs, 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( @@ -1998,7 +207,7 @@ int main(int argc, char **argv) readonly = 1; break; case 'm': - misalign = 1; + qemuio_misalign = 1; break; case 'g': growable = 1; @@ -2039,30 +248,8 @@ int main(int argc, char **argv) /* 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_check_command(init_check_command); /* open the device */ if (!readonly) { |