#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "qapi/qmp/qdict.h"
#include "qemu-io.h"
#include "sysemu/block-backend.h"
#include "block/block.h"
#include "block/qapi.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
+#include "qemu/option.h"
#include "qemu/timer.h"
#include "qemu/cutils.h"
qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
}
-int qemuio_command_usage(const cmdinfo_t *ci)
+void qemuio_command_usage(const cmdinfo_t *ci)
{
printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
- return 0;
}
static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct)
char *cmd = argv[0];
if (!init_check_command(blk, ct)) {
- return 0;
+ return -EINVAL;
}
if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
"bad argument count %d to %s, expected between %d and %d arguments\n",
argc-1, cmd, ct->argmin, ct->argmax);
}
- return 0;
+ return -EINVAL;
}
/* Request additional permissions if necessary for this command. The caller
ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
if (ret < 0) {
error_report_err(local_err);
- return 0;
+ return ret;
}
}
}
- optind = 0;
+ qemu_reset_optind();
return ct->cfunc(blk, argc, argv);
}
}
static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
- int64_t count, int64_t *total)
+ int64_t bytes, int64_t *total)
{
- if (count > INT_MAX) {
+ if (bytes > INT_MAX) {
return -ERANGE;
}
- *total = blk_pread(blk, offset, (uint8_t *)buf, count);
+ *total = blk_pread(blk, offset, (uint8_t *)buf, bytes);
if (*total < 0) {
return *total;
}
}
static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
- int64_t count, int flags, int64_t *total)
+ int64_t bytes, int flags, int64_t *total)
{
- if (count > INT_MAX) {
+ if (bytes > INT_MAX) {
return -ERANGE;
}
- *total = blk_pwrite(blk, offset, (uint8_t *)buf, count, flags);
+ *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags);
if (*total < 0) {
return *total;
}
typedef struct {
BlockBackend *blk;
int64_t offset;
- int64_t count;
+ int64_t bytes;
int64_t *total;
int flags;
int ret;
{
CoWriteZeroes *data = opaque;
- data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->count,
+ data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
data->flags);
data->done = true;
if (data->ret < 0) {
return;
}
- *data->total = data->count;
+ *data->total = data->bytes;
}
static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
- int64_t count, int flags, int64_t *total)
+ int64_t bytes, int flags, int64_t *total)
{
Coroutine *co;
CoWriteZeroes data = {
.blk = blk,
.offset = offset,
- .count = count,
+ .bytes = bytes,
.total = total,
.flags = flags,
.done = false,
};
- if (count > INT_MAX) {
+ if (bytes > INT_MAX) {
return -ERANGE;
}
}
static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
- int64_t count, int64_t *total)
+ int64_t bytes, int64_t *total)
{
int ret;
- if (count >> 9 > BDRV_REQUEST_MAX_SECTORS) {
+ if (bytes >> 9 > BDRV_REQUEST_MAX_SECTORS) {
return -ERANGE;
}
- ret = blk_pwrite_compressed(blk, offset, buf, count);
+ ret = blk_pwrite_compressed(blk, offset, buf, bytes);
if (ret < 0) {
return ret;
}
- *total = count;
+ *total = bytes;
return 1;
}
struct timeval t1, t2;
bool Cflag = false, qflag = false, vflag = false;
bool Pflag = false, sflag = false, lflag = false, bflag = false;
- int c, cnt;
+ int c, cnt, ret;
char *buf;
int64_t offset;
int64_t count;
pattern_count = cvtnum(optarg);
if (pattern_count < 0) {
print_cvtnum_err(pattern_count, optarg);
- return 0;
+ return pattern_count;
}
break;
case 'p':
Pflag = true;
pattern = parse_pattern(optarg);
if (pattern < 0) {
- return 0;
+ return -EINVAL;
}
break;
case 'q':
pattern_offset = cvtnum(optarg);
if (pattern_offset < 0) {
print_cvtnum_err(pattern_offset, optarg);
- return 0;
+ return pattern_offset;
}
break;
case 'v':
vflag = true;
break;
default:
- return qemuio_command_usage(&read_cmd);
+ qemuio_command_usage(&read_cmd);
+ return -EINVAL;
}
}
if (optind != argc - 2) {
- return qemuio_command_usage(&read_cmd);
+ qemuio_command_usage(&read_cmd);
+ return -EINVAL;
}
offset = cvtnum(argv[optind]);
if (offset < 0) {
print_cvtnum_err(offset, argv[optind]);
- return 0;
+ return offset;
}
optind++;
count = cvtnum(argv[optind]);
if (count < 0) {
print_cvtnum_err(count, argv[optind]);
- return 0;
+ return count;
} else if (count > BDRV_REQUEST_MAX_BYTES) {
printf("length cannot exceed %" PRIu64 ", given %s\n",
(uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
- return 0;
+ return -EINVAL;
}
if (!Pflag && (lflag || sflag)) {
- return qemuio_command_usage(&read_cmd);
+ qemuio_command_usage(&read_cmd);
+ return -EINVAL;
}
if (!lflag) {
if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
printf("pattern verification range exceeds end of read data\n");
- return 0;
+ return -EINVAL;
}
if (bflag) {
if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
offset);
- return 0;
+ return -EINVAL;
}
if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
printf("%"PRId64" is not a sector-aligned value for 'count'\n",
count);
- return 0;
+ return -EINVAL;
}
}
gettimeofday(&t1, NULL);
if (bflag) {
- cnt = do_load_vmstate(blk, buf, offset, count, &total);
+ ret = do_load_vmstate(blk, buf, offset, count, &total);
} else {
- cnt = do_pread(blk, buf, offset, count, &total);
+ ret = do_pread(blk, buf, offset, count, &total);
}
gettimeofday(&t2, NULL);
- if (cnt < 0) {
- printf("read failed: %s\n", strerror(-cnt));
+ if (ret < 0) {
+ printf("read failed: %s\n", strerror(-ret));
goto out;
}
+ cnt = ret;
+
+ ret = 0;
if (Pflag) {
void *cmp_buf = g_malloc(pattern_count);
printf("Pattern verification failed at offset %"
PRId64 ", %"PRId64" bytes\n",
offset + pattern_offset, pattern_count);
+ ret = -EINVAL;
}
g_free(cmp_buf);
}
out:
qemu_io_free(buf);
-
- return 0;
+ return ret;
}
static void readv_help(void)
{
struct timeval t1, t2;
bool Cflag = false, qflag = false, vflag = false;
- int c, cnt;
+ int c, cnt, ret;
char *buf;
int64_t offset;
/* Some compilers get confused and warn if this is not initialized. */
Pflag = true;
pattern = parse_pattern(optarg);
if (pattern < 0) {
- return 0;
+ return -EINVAL;
}
break;
case 'q':
vflag = true;
break;
default:
- return qemuio_command_usage(&readv_cmd);
+ qemuio_command_usage(&readv_cmd);
+ return -EINVAL;
}
}
if (optind > argc - 2) {
- return qemuio_command_usage(&readv_cmd);
+ qemuio_command_usage(&readv_cmd);
+ return -EINVAL;
}
offset = cvtnum(argv[optind]);
if (offset < 0) {
print_cvtnum_err(offset, argv[optind]);
- return 0;
+ return offset;
}
optind++;
nr_iov = argc - optind;
buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
if (buf == NULL) {
- return 0;
+ return -EINVAL;
}
gettimeofday(&t1, NULL);
- cnt = do_aio_readv(blk, &qiov, offset, &total);
+ ret = do_aio_readv(blk, &qiov, offset, &total);
gettimeofday(&t2, NULL);
- if (cnt < 0) {
- printf("readv failed: %s\n", strerror(-cnt));
+ if (ret < 0) {
+ printf("readv failed: %s\n", strerror(-ret));
goto out;
}
+ cnt = ret;
+
+ ret = 0;
if (Pflag) {
void *cmp_buf = g_malloc(qiov.size);
memset(cmp_buf, pattern, qiov.size);
if (memcmp(buf, cmp_buf, qiov.size)) {
printf("Pattern verification failed at offset %"
- PRId64 ", %zd bytes\n", offset, qiov.size);
+ PRId64 ", %zu bytes\n", offset, qiov.size);
+ ret = -EINVAL;
}
g_free(cmp_buf);
}
out:
qemu_iovec_destroy(&qiov);
qemu_io_free(buf);
- return 0;
+ return ret;
}
static void write_help(void)
" -b, -- write to the VM state rather than the virtual disk\n"
" -c, -- write compressed data with blk_write_compressed\n"
" -f, -- use Force Unit Access semantics\n"
+" -n, -- with -z, don't allow slow fallback\n"
" -p, -- ignored for backwards compatibility\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
.perm = BLK_PERM_WRITE,
.argmin = 2,
.argmax = -1,
- .args = "[-bcCfquz] [-P pattern] off len",
+ .args = "[-bcCfnquz] [-P pattern] off len",
.oneline = "writes a number of bytes at a specified offset",
.help = write_help,
};
bool Cflag = false, qflag = false, bflag = false;
bool Pflag = false, zflag = false, cflag = false;
int flags = 0;
- int c, cnt;
+ int c, cnt, ret;
char *buf = NULL;
int64_t offset;
int64_t count;
int64_t total = 0;
int pattern = 0xcd;
- while ((c = getopt(argc, argv, "bcCfpP:quz")) != -1) {
+ while ((c = getopt(argc, argv, "bcCfnpP:quz")) != -1) {
switch (c) {
case 'b':
bflag = true;
case 'f':
flags |= BDRV_REQ_FUA;
break;
+ case 'n':
+ flags |= BDRV_REQ_NO_FALLBACK;
+ break;
case 'p':
/* Ignored for backwards compatibility */
break;
Pflag = true;
pattern = parse_pattern(optarg);
if (pattern < 0) {
- return 0;
+ return -EINVAL;
}
break;
case 'q':
zflag = true;
break;
default:
- return qemuio_command_usage(&write_cmd);
+ qemuio_command_usage(&write_cmd);
+ return -EINVAL;
}
}
if (optind != argc - 2) {
- return qemuio_command_usage(&write_cmd);
+ qemuio_command_usage(&write_cmd);
+ return -EINVAL;
}
if (bflag && zflag) {
printf("-b and -z cannot be specified at the same time\n");
- return 0;
+ return -EINVAL;
}
if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
printf("-f and -b or -c cannot be specified at the same time\n");
- return 0;
+ return -EINVAL;
+ }
+
+ if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) {
+ printf("-n requires -z to be specified\n");
+ return -EINVAL;
}
if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
printf("-u requires -z to be specified\n");
- return 0;
+ return -EINVAL;
}
if (zflag && Pflag) {
printf("-z and -P cannot be specified at the same time\n");
- return 0;
+ return -EINVAL;
}
offset = cvtnum(argv[optind]);
if (offset < 0) {
print_cvtnum_err(offset, argv[optind]);
- return 0;
+ return offset;
}
optind++;
count = cvtnum(argv[optind]);
if (count < 0) {
print_cvtnum_err(count, argv[optind]);
- return 0;
+ return count;
} else if (count > BDRV_REQUEST_MAX_BYTES) {
printf("length cannot exceed %" PRIu64 ", given %s\n",
(uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
- return 0;
+ return -EINVAL;
}
if (bflag || cflag) {
if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
offset);
- return 0;
+ return -EINVAL;
}
if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
printf("%"PRId64" is not a sector-aligned value for 'count'\n",
count);
- return 0;
+ return -EINVAL;
}
}
gettimeofday(&t1, NULL);
if (bflag) {
- cnt = do_save_vmstate(blk, buf, offset, count, &total);
+ ret = do_save_vmstate(blk, buf, offset, count, &total);
} else if (zflag) {
- cnt = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
+ ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
} else if (cflag) {
- cnt = do_write_compressed(blk, buf, offset, count, &total);
+ ret = do_write_compressed(blk, buf, offset, count, &total);
} else {
- cnt = do_pwrite(blk, buf, offset, count, flags, &total);
+ ret = do_pwrite(blk, buf, offset, count, flags, &total);
}
gettimeofday(&t2, NULL);
- if (cnt < 0) {
- printf("write failed: %s\n", strerror(-cnt));
+ if (ret < 0) {
+ printf("write failed: %s\n", strerror(-ret));
goto out;
}
+ cnt = ret;
+
+ ret = 0;
if (qflag) {
goto out;
if (!zflag) {
qemu_io_free(buf);
}
-
- return 0;
+ return ret;
}
static void
struct timeval t1, t2;
bool Cflag = false, qflag = false;
int flags = 0;
- int c, cnt;
+ int c, cnt, ret;
char *buf;
int64_t offset;
/* Some compilers get confused and warn if this is not initialized. */
case 'P':
pattern = parse_pattern(optarg);
if (pattern < 0) {
- return 0;
+ return -EINVAL;
}
break;
default:
- return qemuio_command_usage(&writev_cmd);
+ qemuio_command_usage(&writev_cmd);
+ return -EINVAL;
}
}
if (optind > argc - 2) {
- return qemuio_command_usage(&writev_cmd);
+ qemuio_command_usage(&writev_cmd);
+ return -EINVAL;
}
offset = cvtnum(argv[optind]);
if (offset < 0) {
print_cvtnum_err(offset, argv[optind]);
- return 0;
+ return offset;
}
optind++;
nr_iov = argc - optind;
buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
if (buf == NULL) {
- return 0;
+ return -EINVAL;
}
gettimeofday(&t1, NULL);
- cnt = do_aio_writev(blk, &qiov, offset, flags, &total);
+ ret = do_aio_writev(blk, &qiov, offset, flags, &total);
gettimeofday(&t2, NULL);
- if (cnt < 0) {
- printf("writev failed: %s\n", strerror(-cnt));
+ if (ret < 0) {
+ printf("writev failed: %s\n", strerror(-ret));
goto out;
}
+ cnt = ret;
+
+ ret = 0;
if (qflag) {
goto out;
out:
qemu_iovec_destroy(&qiov);
qemu_io_free(buf);
- return 0;
+ return ret;
}
struct aio_ctx {
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);
+ PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
}
g_free(cmp_buf);
}
" standard output stream (with -v option) for subsequent inspection.\n"
" The read is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed.\n"
+" Note that due to its asynchronous nature, this command will be\n"
+" considered successful once the request is submitted, independently\n"
+" of potential I/O errors or pattern mismatches.\n"
" -C, -- report statistics in a machine parsable format\n"
" -P, -- use a pattern to verify read data\n"
" -i, -- treat request as invalid, for exercising stats\n"
ctx->pattern = parse_pattern(optarg);
if (ctx->pattern < 0) {
g_free(ctx);
- return 0;
+ return -EINVAL;
}
break;
case 'i':
break;
default:
g_free(ctx);
- return qemuio_command_usage(&aio_read_cmd);
+ qemuio_command_usage(&aio_read_cmd);
+ return -EINVAL;
}
}
if (optind > argc - 2) {
g_free(ctx);
- return qemuio_command_usage(&aio_read_cmd);
+ qemuio_command_usage(&aio_read_cmd);
+ return -EINVAL;
}
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
- print_cvtnum_err(ctx->offset, argv[optind]);
+ int ret = ctx->offset;
+ print_cvtnum_err(ret, argv[optind]);
g_free(ctx);
- return 0;
+ return ret;
}
optind++;
if (ctx->buf == NULL) {
block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
g_free(ctx);
- return 0;
+ return -EINVAL;
}
gettimeofday(&ctx->t1, NULL);
" filled with a set pattern (0xcdcdcdcd).\n"
" The write is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed.\n"
+" Note that due to its asynchronous nature, this command will be\n"
+" considered successful once the request is submitted, independently\n"
+" of potential I/O errors or pattern mismatches.\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -f, -- use Force Unit Access semantics\n"
pattern = parse_pattern(optarg);
if (pattern < 0) {
g_free(ctx);
- return 0;
+ return -EINVAL;
}
break;
case 'i':
break;
default:
g_free(ctx);
- return qemuio_command_usage(&aio_write_cmd);
+ qemuio_command_usage(&aio_write_cmd);
+ return -EINVAL;
}
}
if (optind > argc - 2) {
g_free(ctx);
- return qemuio_command_usage(&aio_write_cmd);
+ qemuio_command_usage(&aio_write_cmd);
+ return -EINVAL;
}
if (ctx->zflag && optind != argc - 2) {
printf("-z supports only a single length parameter\n");
g_free(ctx);
- return 0;
+ return -EINVAL;
}
if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
printf("-u requires -z to be specified\n");
g_free(ctx);
- return 0;
+ return -EINVAL;
}
if (ctx->zflag && ctx->Pflag) {
printf("-z and -P cannot be specified at the same time\n");
g_free(ctx);
- return 0;
+ return -EINVAL;
}
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
- print_cvtnum_err(ctx->offset, argv[optind]);
+ int ret = ctx->offset;
+ print_cvtnum_err(ret, argv[optind]);
g_free(ctx);
- return 0;
+ return ret;
}
optind++;
if (count < 0) {
print_cvtnum_err(count, argv[optind]);
g_free(ctx);
- return 0;
+ return count;
}
ctx->qiov.size = count;
if (ctx->buf == NULL) {
block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
g_free(ctx);
- return 0;
+ return -EINVAL;
}
gettimeofday(&ctx->t1, NULL);
blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
ctx);
}
+
return 0;
}
static int flush_f(BlockBackend *blk, int argc, char **argv)
{
- blk_flush(blk);
- return 0;
+ return blk_flush(blk);
}
static const cmdinfo_t flush_cmd = {
offset = cvtnum(argv[1]);
if (offset < 0) {
print_cvtnum_err(offset, argv[1]);
- return 0;
+ return offset;
}
- ret = blk_truncate(blk, offset, &local_err);
+ ret = blk_truncate(blk, offset, PREALLOC_MODE_OFF, &local_err);
if (ret < 0) {
error_report_err(local_err);
- return 0;
+ return ret;
}
return 0;
size = blk_getlength(blk);
if (size < 0) {
printf("getlength: %s\n", strerror(-size));
- return 0;
+ return size;
}
cvtstr(size, s1, sizeof(s1));
BlockDriverState *bs = blk_bs(blk);
BlockDriverInfo bdi;
ImageInfoSpecific *spec_info;
+ Error *local_err = NULL;
char s1[64], s2[64];
int ret;
ret = bdrv_get_info(bs, &bdi);
if (ret) {
- return 0;
+ return ret;
}
cvtstr(bdi.cluster_size, s1, sizeof(s1));
printf("cluster size: %s\n", s1);
printf("vm state offset: %s\n", s2);
- spec_info = bdrv_get_specific_info(bs);
+ spec_info = bdrv_get_specific_info(bs, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -EIO;
+ }
if (spec_info) {
printf("Format specific information:\n");
bdrv_image_info_specific_dump(fprintf, stdout, spec_info);
struct timeval t1, t2;
bool Cflag = false, qflag = false;
int c, ret;
- int64_t offset, count;
+ int64_t offset, bytes;
while ((c = getopt(argc, argv, "Cq")) != -1) {
switch (c) {
qflag = true;
break;
default:
- return qemuio_command_usage(&discard_cmd);
+ qemuio_command_usage(&discard_cmd);
+ return -EINVAL;
}
}
if (optind != argc - 2) {
- return qemuio_command_usage(&discard_cmd);
+ qemuio_command_usage(&discard_cmd);
+ return -EINVAL;
}
offset = cvtnum(argv[optind]);
if (offset < 0) {
print_cvtnum_err(offset, argv[optind]);
- return 0;
+ return offset;
}
optind++;
- count = cvtnum(argv[optind]);
- if (count < 0) {
- print_cvtnum_err(count, argv[optind]);
- return 0;
- } else if (count >> BDRV_SECTOR_BITS > BDRV_REQUEST_MAX_SECTORS) {
+ bytes = cvtnum(argv[optind]);
+ if (bytes < 0) {
+ print_cvtnum_err(bytes, argv[optind]);
+ return bytes;
+ } else if (bytes >> BDRV_SECTOR_BITS > BDRV_REQUEST_MAX_SECTORS) {
printf("length cannot exceed %"PRIu64", given %s\n",
(uint64_t)BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS,
argv[optind]);
- return 0;
+ return -EINVAL;
}
gettimeofday(&t1, NULL);
- ret = blk_pdiscard(blk, offset, count);
+ ret = blk_pdiscard(blk, offset, bytes);
gettimeofday(&t2, NULL);
if (ret < 0) {
printf("discard failed: %s\n", strerror(-ret));
- goto out;
+ return ret;
}
/* Finally, report back -- -C gives a parsable format */
if (!qflag) {
t2 = tsub(t2, t1);
- print_report("discard", &t2, offset, count, count, 1, Cflag);
+ print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
}
-out:
return 0;
}
static int alloc_f(BlockBackend *blk, int argc, char **argv)
{
BlockDriverState *bs = blk_bs(blk);
- int64_t offset, sector_num, nb_sectors, remaining, count;
+ int64_t offset, start, remaining, count;
char s1[64];
- int num, ret;
- int64_t sum_alloc;
+ int ret;
+ int64_t num, sum_alloc;
- offset = cvtnum(argv[1]);
+ start = offset = cvtnum(argv[1]);
if (offset < 0) {
print_cvtnum_err(offset, argv[1]);
- return 0;
- } else if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
- printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
- offset);
- return 0;
+ return offset;
}
if (argc == 3) {
count = cvtnum(argv[2]);
if (count < 0) {
print_cvtnum_err(count, argv[2]);
- return 0;
- } else if (count > INT_MAX * BDRV_SECTOR_SIZE) {
- printf("length argument cannot exceed %llu, given %s\n",
- INT_MAX * BDRV_SECTOR_SIZE, argv[2]);
- return 0;
+ return count;
}
} else {
count = BDRV_SECTOR_SIZE;
}
- if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
- printf("%" PRId64 " is not a sector-aligned value for 'count'\n",
- count);
- return 0;
- }
- nb_sectors = count >> BDRV_SECTOR_BITS;
- remaining = nb_sectors;
+ remaining = count;
sum_alloc = 0;
- sector_num = offset >> 9;
while (remaining) {
- ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
+ ret = bdrv_is_allocated(bs, offset, remaining, &num);
if (ret < 0) {
printf("is_allocated failed: %s\n", strerror(-ret));
- return 0;
+ return ret;
}
- sector_num += num;
+ offset += num;
remaining -= num;
if (ret) {
sum_alloc += num;
}
if (num == 0) {
- nb_sectors -= remaining;
+ count -= remaining;
remaining = 0;
}
}
- cvtstr(offset, s1, sizeof(s1));
+ cvtstr(start, s1, sizeof(s1));
printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
- sum_alloc << BDRV_SECTOR_BITS, nb_sectors << BDRV_SECTOR_BITS, s1);
+ sum_alloc, count, s1);
return 0;
}
};
-static int map_is_allocated(BlockDriverState *bs, int64_t sector_num,
- int64_t nb_sectors, int64_t *pnum)
+static int map_is_allocated(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, int64_t *pnum)
{
- int num, num_checked;
+ int64_t num;
+ int num_checked;
int ret, firstret;
- num_checked = MIN(nb_sectors, INT_MAX);
- ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
+ num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
+ ret = bdrv_is_allocated(bs, offset, num_checked, &num);
if (ret < 0) {
return ret;
}
firstret = ret;
*pnum = num;
- while (nb_sectors > 0 && ret == firstret) {
- sector_num += num;
- nb_sectors -= num;
+ while (bytes > 0 && ret == firstret) {
+ offset += num;
+ bytes -= num;
- num_checked = MIN(nb_sectors, INT_MAX);
- ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
+ num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
+ ret = bdrv_is_allocated(bs, offset, num_checked, &num);
if (ret == firstret && num) {
*pnum += num;
} else {
static int map_f(BlockBackend *blk, int argc, char **argv)
{
- int64_t offset;
- int64_t nb_sectors, total_sectors;
+ int64_t offset, bytes;
char s1[64], s2[64];
int64_t num;
int ret;
const char *retstr;
offset = 0;
- total_sectors = blk_nb_sectors(blk);
- if (total_sectors < 0) {
- error_report("Failed to query image length: %s",
- strerror(-total_sectors));
- return 0;
+ bytes = blk_getlength(blk);
+ if (bytes < 0) {
+ error_report("Failed to query image length: %s", strerror(-bytes));
+ return bytes;
}
- nb_sectors = total_sectors;
-
- do {
- ret = map_is_allocated(blk_bs(blk), offset, nb_sectors, &num);
+ while (bytes) {
+ ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
if (ret < 0) {
error_report("Failed to get allocation status: %s", strerror(-ret));
- return 0;
+ return ret;
} else if (!num) {
error_report("Unexpected end of image");
- return 0;
+ return -EIO;
}
retstr = ret ? " allocated" : "not allocated";
- cvtstr(num << BDRV_SECTOR_BITS, s1, sizeof(s1));
- cvtstr(offset << BDRV_SECTOR_BITS, s2, sizeof(s2));
+ cvtstr(num, s1, sizeof(s1));
+ cvtstr(offset, s2, sizeof(s2));
printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
- s1, num << BDRV_SECTOR_BITS, retstr,
- s2, offset << BDRV_SECTOR_BITS);
+ s1, num, retstr, s2, offset);
offset += num;
- nb_sectors -= num;
- } while (offset < total_sectors);
+ bytes -= num;
+ }
return 0;
}
" 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
"\n"
" -r, -- Reopen the image read-only\n"
+" -w, -- Reopen the image read-write\n"
" -c, -- Change the cache mode to the given value\n"
" -o, -- Changes block driver options (cf. 'open' command)\n"
"\n");
.argmin = 0,
.argmax = -1,
.cfunc = reopen_f,
- .args = "[-r] [-c cache] [-o options]",
+ .args = "[(-r|-w)] [-c cache] [-o options]",
.oneline = "reopens an image with new options",
.help = reopen_help,
};
int c;
int flags = bs->open_flags;
bool writethrough = !blk_enable_write_cache(blk);
+ bool has_rw_option = false;
+ bool has_cache_option = false;
BlockReopenQueue *brq;
Error *local_err = NULL;
- while ((c = getopt(argc, argv, "c:o:r")) != -1) {
+ while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
switch (c) {
case 'c':
if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
error_report("Invalid cache option: %s", optarg);
- return 0;
+ return -EINVAL;
}
+ has_cache_option = true;
break;
case 'o':
if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
qemu_opts_reset(&reopen_opts);
- return 0;
+ return -EINVAL;
}
break;
case 'r':
+ if (has_rw_option) {
+ error_report("Only one -r/-w option may be given");
+ return -EINVAL;
+ }
flags &= ~BDRV_O_RDWR;
+ has_rw_option = true;
+ break;
+ case 'w':
+ if (has_rw_option) {
+ error_report("Only one -r/-w option may be given");
+ return -EINVAL;
+ }
+ flags |= BDRV_O_RDWR;
+ has_rw_option = true;
break;
default:
qemu_opts_reset(&reopen_opts);
- return qemuio_command_usage(&reopen_cmd);
+ qemuio_command_usage(&reopen_cmd);
+ return -EINVAL;
}
}
if (optind != argc) {
qemu_opts_reset(&reopen_opts);
- return qemuio_command_usage(&reopen_cmd);
+ qemuio_command_usage(&reopen_cmd);
+ return -EINVAL;
}
- if (writethrough != blk_enable_write_cache(blk) &&
+ if (!writethrough != blk_enable_write_cache(blk) &&
blk_get_attached_dev(blk))
{
error_report("Cannot change cache.writeback: Device attached");
qemu_opts_reset(&reopen_opts);
- return 0;
+ return -EBUSY;
+ }
+
+ if (!(flags & BDRV_O_RDWR)) {
+ uint64_t orig_perm, orig_shared_perm;
+
+ bdrv_drain(bs);
+
+ blk_get_perm(blk, &orig_perm, &orig_shared_perm);
+ blk_set_perm(blk,
+ orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
+ orig_shared_perm,
+ &error_abort);
}
qopts = qemu_opts_find(&reopen_opts, NULL);
- opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
+ opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
qemu_opts_reset(&reopen_opts);
- brq = bdrv_reopen_queue(NULL, bs, opts, flags);
- bdrv_reopen_multiple(bdrv_get_aio_context(bs), brq, &local_err);
+ if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
+ if (has_rw_option) {
+ error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
+ qobject_unref(opts);
+ return -EINVAL;
+ }
+ } else {
+ qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
+ }
+
+ if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
+ qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
+ if (has_cache_option) {
+ error_report("Cannot set both -c and the cache options");
+ qobject_unref(opts);
+ return -EINVAL;
+ }
+ } else {
+ qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
+ qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
+ }
+
+ bdrv_subtree_drained_begin(bs);
+ brq = bdrv_reopen_queue(NULL, bs, opts, true);
+ bdrv_reopen_multiple(brq, &local_err);
+ bdrv_subtree_drained_end(bs);
+
if (local_err) {
error_report_err(local_err);
- } else {
- blk_set_enable_write_cache(blk, !writethrough);
+ return -EINVAL;
}
+ blk_set_enable_write_cache(blk, !writethrough);
return 0;
}
ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
if (ret < 0) {
printf("Could not set breakpoint: %s\n", strerror(-ret));
+ return ret;
}
return 0;
ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
if (ret < 0) {
printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
+ return ret;
}
return 0;
ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
if (ret < 0) {
printf("Could not resume request: %s\n", strerror(-ret));
+ return ret;
}
return 0;
while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
aio_poll(blk_get_aio_context(blk), true);
}
-
return 0;
}
int64_t sig = cvtnum(argv[1]);
if (sig < 0) {
print_cvtnum_err(sig, argv[1]);
- return 0;
+ return sig;
} else if (sig > NSIG) {
printf("signal argument '%s' is too large to be a valid signal\n",
argv[1]);
- return 0;
+ return -EINVAL;
}
/* Using raise() to kill this process does not necessarily flush all open
fflush(stderr);
raise(sig);
+
return 0;
}
ms = strtol(argv[1], &endptr, 0);
if (ms < 0 || *endptr != '\0') {
printf("%s is not a valid number\n", argv[1]);
- return 0;
+ return -EINVAL;
}
timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
}
timer_free(timer);
-
return 0;
}
ct = find_command(argv[1]);
if (ct == NULL) {
printf("command %s not found\n", argv[1]);
- return 0;
+ return -EINVAL;
}
help_onecmd(argv[1], ct);
.oneline = "help for one or all commands",
};
-bool qemuio_command(BlockBackend *blk, const char *cmd)
+int qemuio_command(BlockBackend *blk, const char *cmd)
{
AioContext *ctx;
char *input;
const cmdinfo_t *ct;
char **v;
int c;
- bool done = false;
+ int ret = 0;
input = g_strdup(cmd);
v = breakline(input, &c);
if (ct) {
ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context();
aio_context_acquire(ctx);
- done = command(blk, ct, c, v);
+ ret = command(blk, ct, c, v);
aio_context_release(ctx);
} else {
fprintf(stderr, "command \"%s\" not found\n", v[0]);
+ ret = -EINVAL;
}
}
g_free(input);
g_free(v);
- return done;
+ return ret;
}
static void __attribute((constructor)) init_qemuio_commands(void)
projects / mirror_qemu.git / blobdiff