* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
+#include <sys/time.h>
#include <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
#include <getopt.h>
+#include <libgen.h>
#include "qemu-common.h"
#include "block_int.h"
static int misalign;
/*
+ * Parse the pattern argument to various sub-commands.
+ *
+ * Because the pattern is used as an argument to memset it must evaluate
+ * to an unsigned integer that fits into a single byte.
+ */
+static int parse_pattern(const char *arg)
+{
+ char *endptr = NULL;
+ long pattern;
+
+ pattern = strtol(arg, &endptr, 0);
+ if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
+ printf("%s is not a valid pattern byte\n", arg);
+ return -1;
+ }
+
+ return pattern;
+}
+
+/*
* Memory allocation helpers.
*
* Make sure memory is aligned by default, or purposefully misaligned if
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;
break;
case 'P':
Pflag = 1;
- pattern = atoi(optarg);
+ pattern = parse_pattern(optarg);
+ if (pattern < 0)
+ return 0;
break;
case 'q':
qflag = 1;
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,
};
break;
case 'P':
Pflag = 1;
- pattern = atoi(optarg);
+ pattern = parse_pattern(optarg);
+ if (pattern < 0)
+ return 0;
break;
case 'q':
qflag = 1;
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;
pflag = 1;
break;
case 'P':
- pattern = atoi(optarg);
+ pattern = parse_pattern(optarg);
+ if (pattern < 0)
+ return 0;
break;
case 'q':
qflag = 1;
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,
};
qflag = 1;
break;
case 'P':
- pattern = atoi(optarg);
+ pattern = parse_pattern(optarg);
+ if (pattern < 0)
+ return 0;
break;
default:
return command_usage(&writev_cmd);
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);
}
break;
case 'P':
ctx->Pflag = 1;
- ctx->pattern = atoi(optarg);
+ ctx->pattern = parse_pattern(optarg);
+ if (ctx->pattern < 0)
+ return 0;
break;
case 'q':
ctx->qflag = 1;
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;
}
ctx->qflag = 1;
break;
case 'P':
- pattern = atoi(optarg);
+ pattern = parse_pattern(optarg);
+ if (pattern < 0)
+ return 0;
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;
}
alloc_f(int argc, char **argv)
{
int64_t offset;
- int nb_sectors;
+ int nb_sectors, remaining;
char s1[64];
- int num;
+ int num, sum_alloc;
int ret;
- const char *retstr;
offset = cvtnum(argv[1]);
if (offset & 0x1ff) {
else
nb_sectors = 1;
- ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
+ remaining = nb_sectors;
+ sum_alloc = 0;
+ while (remaining) {
+ ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
+ remaining -= num;
+ if (ret) {
+ sum_alloc += num;
+ }
+ }
cvtstr(offset, s1, sizeof(s1));
- retstr = ret ? "allocated" : "not allocated";
if (nb_sectors == 1)
- printf("sector %s at offset %s\n", retstr, s1);
+ printf("sector allocated at offset %s\n", s1);
else
- printf("%d/%d sectors %s at offset %s\n",
- num, nb_sectors, retstr, s1);
+ printf("%d/%d sectors allocated at offset %s\n",
+ sum_alloc, nb_sectors, s1);
return 0;
}
.oneline = "close the current open file",
};
-static int openfile(char *name, int flags)
+static int openfile(char *name, int flags, int growable)
{
if (bs) {
fprintf(stderr, "file open already, try 'help close'\n");
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) {
+ bs->growable = 1;
+ }
return 0;
}
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
" -n, -- disable host cache\n"
+" -g, -- allow file to grow (only applies to protocols)"
"\n");
}
{
int flags = 0;
int readonly = 0;
+ int growable = 0;
int c;
- while ((c = getopt(argc, argv, "snCr")) != EOF) {
+ while ((c = getopt(argc, argv, "snCrg")) != EOF) {
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
case 'r':
readonly = 1;
break;
+ case 'g':
+ growable = 1;
+ break;
default:
return command_usage(&open_cmd);
}
if (optind != argc - 1)
return command_usage(&open_cmd);
- return openfile(argv[optind], flags);
+ return openfile(argv[optind], flags, growable);
}
static const cmdinfo_t open_cmd = {
" -r, --read-only export read-only\n"
" -s, --snapshot use snapshot file\n"
" -n, --nocache disable host cache\n"
+" -g, --growable allow file to grow (only applies to protocols)\n"
" -m, --misalign misalign allocations for O_DIRECT\n"
+" -k, --native-aio use kernel AIO implementation (on Linux only)\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
"\n",
int main(int argc, char **argv)
{
int readonly = 0;
- const char *sopt = "hVc:Crsnm";
+ int growable = 0;
+ const char *sopt = "hVc:Crsnmgk";
struct option lopt[] = {
- { "help", 0, 0, 'h' },
- { "version", 0, 0, 'V' },
- { "offset", 1, 0, 'o' },
- { "cmd", 1, 0, 'c' },
- { "create", 0, 0, 'C' },
- { "read-only", 0, 0, 'r' },
- { "snapshot", 0, 0, 's' },
- { "nocache", 0, 0, 'n' },
- { "misalign", 0, 0, 'm' },
- { NULL, 0, 0, 0 }
+ { "help", 0, NULL, 'h' },
+ { "version", 0, NULL, 'V' },
+ { "offset", 1, NULL, 'o' },
+ { "cmd", 1, NULL, 'c' },
+ { "create", 0, NULL, 'C' },
+ { "read-only", 0, NULL, 'r' },
+ { "snapshot", 0, NULL, 's' },
+ { "nocache", 0, NULL, 'n' },
+ { "misalign", 0, NULL, 'm' },
+ { "growable", 0, NULL, 'g' },
+ { "native-aio", 0, NULL, 'k' },
+ { NULL, 0, NULL, 0 }
};
int c;
int opt_index = 0;
case 'm':
misalign = 1;
break;
+ case 'g':
+ growable = 1;
+ break;
+ case 'k':
+ flags |= BDRV_O_NATIVE_AIO;
+ break;
case 'V':
printf("%s version %s\n", progname, VERSION);
exit(0);
flags |= BDRV_O_RDWR;
if ((argc - optind) == 1)
- openfile(argv[optind], flags);
+ openfile(argv[optind], flags, growable);
command_loop();
/*
projects / qemu / blobdiff