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qemu-io: New command map 

The new map command in qemu-io lists all allocated/unallocated areas in an
image file.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2010-09-16 13:18:08 +02:00
parent 51ef67270b
commit 191c2890dd
1 changed files with 39 additions and 0 deletions
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39
qemu-io.c
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@ -1442,6 +1442,44 @@ static const cmdinfo_t alloc_cmd = {
.oneline = "checks if a sector is present in the file",
};
static int
map_f(int argc, char **argv)
{
int64_t offset;
int64_t nb_sectors;
char s1[64];
int num, num_checked;
int ret;
const char *retstr;
offset = 0;
nb_sectors = bs->total_sectors;
do {
num_checked = MIN(nb_sectors, INT_MAX);
ret = bdrv_is_allocated(bs, offset, num_checked, &num);
retstr = ret ? " allocated" : "not allocated";
cvtstr(offset << 9ULL, s1, sizeof(s1));
printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
offset << 9ULL, num, num_checked, 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
close_f(int argc, char **argv)
{
@ -1680,6 +1718,7 @@ int main(int argc, char **argv)
add_command(&length_cmd);
add_command(&info_cmd);
add_command(&alloc_cmd);
add_command(&map_cmd);
add_args_command(init_args_command);
add_check_command(init_check_command);