The new map command in qemu-io lists all allocated/unallocated areas in an
image file.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
qemu-io.c | 39 +++++++++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/qemu-io.c b/qemu-io.c
index b4e5cc8..ff353eb 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -1443,6 +1443,44 @@ static const cmdinfo_t alloc_cmd = {
};
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)
{
bdrv_close(bs);
@@ -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);
--
1.7.2.2
