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-rw-r--r--qemu-io-cmds.c1835
1 files changed, 1835 insertions, 0 deletions
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
new file mode 100644
index 0000000000..0a3817ae7a
--- /dev/null
+++ b/qemu-io-cmds.c
@@ -0,0 +1,1835 @@
+/*
+ * 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 "qemu-common.h"
+#include "block/block_int.h"
+#include "cmd.h"
+
+#define CMD_NOFILE_OK 0x01
+
+int qemuio_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 (qemuio_misalign) {
+ len += MISALIGN_OFFSET;
+ }
+ buf = qemu_blockalign(bs, len);
+ memset(buf, pattern, len);
+ if (qemuio_misalign) {
+ buf += MISALIGN_OFFSET;
+ }
+ return buf;
+}
+
+static void qemu_io_free(void *p)
+{
+ if (qemuio_misalign) {
+ p -= MISALIGN_OFFSET;
+ }
+ qemu_vfree(p);
+}
+
+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)",
+};
+
+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 __attribute((constructor)) init_qemuio_commands(void)
+{
+ /* initialize commands */
+ help_init();
+ 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);
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-11 16:13:38 +0000