return 1;
}
+static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
+{
+ *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
+ if (*total < 0)
+ return *total;
+ return 1;
+}
+
+static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
+{
+ *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
+ if (*total < 0)
+ return *total;
+ return 1;
+}
+
#define NOT_DONE 0x7fffffff
static void aio_rw_done(void *opaque, int ret)
{
"\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"
{
struct timeval t1, t2;
int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
- int Pflag = 0, sflag = 0, lflag = 0;
+ int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
int c, cnt;
char *buf;
int64_t offset;
int total = 0;
int pattern = 0, pattern_offset = 0, pattern_count = 0;
- while ((c = getopt(argc, argv, "Cl:pP:qs:v")) != EOF) {
+ while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
switch (c) {
+ case 'b':
+ bflag = 1;
+ break;
case 'C':
Cflag = 1;
break;
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]);
gettimeofday(&t1, NULL);
if (pflag)
cnt = do_pread(buf, offset, count, &total);
+ else if (bflag)
+ cnt = do_load_vmstate(buf, offset, count, &total);
else
cnt = do_read(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("read failed: %s\n", strerror(-cnt));
- return 0;
+ goto out;
}
if (Pflag) {
}
if (qflag)
- return 0;
+ goto out;
if (vflag)
dump_buffer(buf, offset, count);
t2 = tsub(t2, t1);
print_report("read", &t2, offset, count, total, cnt, Cflag);
+out:
qemu_io_free(buf);
return 0;
.cfunc = read_f,
.argmin = 2,
.argmax = -1,
- .args = "[-aCpqv] [-P pattern [-s off] [-l len]] off len",
+ .args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
.oneline = "reads a number of bytes at a specified offset",
.help = read_help,
};
if (cnt < 0) {
printf("readv failed: %s\n", strerror(-cnt));
- return 0;
+ goto out;
}
if (Pflag) {
}
if (qflag)
- return 0;
+ goto out;
if (vflag)
dump_buffer(buf, offset, qiov.size);
t2 = tsub(t2, t1);
print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
+out:
qemu_io_free(buf);
-
return 0;
}
"\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"
" -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"
write_f(int argc, char **argv)
{
struct timeval t1, t2;
- int Cflag = 0, pflag = 0, qflag = 0;
+ int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
int c, cnt;
char *buf;
int64_t offset;
int total = 0;
int pattern = 0xcd;
- while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
+ while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
switch (c) {
+ case 'b':
+ bflag = 1;
+ break;
case 'C':
Cflag = 1;
break;
if (optind != argc - 2)
return command_usage(&write_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]);
gettimeofday(&t1, NULL);
if (pflag)
cnt = do_pwrite(buf, offset, count, &total);
+ else if (bflag)
+ cnt = do_save_vmstate(buf, offset, count, &total);
else
cnt = do_write(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("write failed: %s\n", strerror(-cnt));
- return 0;
+ goto out;
}
if (qflag)
- return 0;
+ goto out;
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, count, total, cnt, Cflag);
+out:
qemu_io_free(buf);
return 0;
.cfunc = write_f,
.argmin = 2,
.argmax = -1,
- .args = "[-aCpq] [-P pattern ] off len",
+ .args = "[-abCpq] [-P pattern ] off len",
.oneline = "writes a number of bytes at a specified offset",
.help = write_help,
};
if (cnt < 0) {
printf("writev failed: %s\n", strerror(-cnt));
- return 0;
+ goto out;
}
if (qflag)
- return 0;
+ 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_io_free(buf);
-
return 0;
}
if (ret < 0) {
printf("aio_write failed: %s\n", strerror(-ret));
- return;
+ goto out;
}
if (ctx->qflag) {
- return;
+ 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);
free(ctx);
}
if (ret < 0) {
printf("readv failed: %s\n", strerror(-ret));
- return;
+ goto out;
}
if (ctx->Pflag) {
}
if (ctx->qflag) {
- return;
+ goto out;
}
if (ctx->vflag) {
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);
free(ctx);
}
ctx->vflag = 1;
break;
default:
+ free(ctx);
return command_usage(&aio_read_cmd);
}
}
- if (optind > argc - 2)
+ if (optind > argc - 2) {
+ 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]);
+ free(ctx);
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
+ free(ctx);
return 0;
}
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_read_done, ctx);
- if (!acb)
+ if (!acb) {
+ free(ctx->buf);
+ free(ctx);
return -EIO;
+ }
return 0;
}
pattern = atoi(optarg);
break;
default:
+ free(ctx);
return command_usage(&aio_write_cmd);
}
}
- if (optind > argc - 2)
+ if (optind > argc - 2) {
+ 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]);
+ free(ctx);
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
+ free(ctx);
return 0;
}
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_write_done, ctx);
- if (!acb)
+ if (!acb) {
+ free(ctx->buf);
+ free(ctx);
return -EIO;
+ }
return 0;
}
if (!bs)
return 1;
+ if (growable) {
+ flags |= BDRV_O_FILE;
+ }
+
if (bdrv_open(bs, name, flags) == -1) {
fprintf(stderr, "%s: can't open device %s\n", progname, name);
bs = NULL;
return 1;
}
-
if (growable) {
- if (!bs->drv || !bs->drv->protocol_name) {
- fprintf(stderr,
- "%s: only protocols can be opened growable\n",
- progname);
- return 1;
- }
bs->growable = 1;
}
-
return 0;
}
" -r, --read-only export read-only\n"
" -s, --snapshot use snapshot file\n"
" -n, --nocache disable host cache\n"
+" -g, --growable allow file to grow (only applies to protocols)\n"
" -m, --misalign misalign allocations for O_DIRECT\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
projects / qemu.git / blobdiff