return 0;
}
+static void volume_id_reset_result(struct volume_id *id)
+{
+ id->label_raw_len = 0;
+ id->label[0] = '\0';
+ id->uuid_raw_len = 0;
+ id->uuid[0] = '\0';
+ id->usage_id = VOLUME_ID_UNUSED;
+ id->usage = NULL;
+ id->type = NULL;
+ id->type_version[0] = '\0';
+}
+
/**
* volume_id_probe_filesystem:
* @id: Probing context.
* we do not return a probing result.
*
* We can not afford to mount a volume with the wrong filesystem code and
- * possibly corrupt it. Linux ssytems have the problem of dozens of possible
+ * possibly corrupt it. Linux sytems have the problem of dozens of possible
* filesystem types, and volumes with left-over signatures from former
- * filesystem types. Invalid signature need to be removed from the volume
+ * filesystem types. Invalid signatures need to be removed from the volume
* to make the filesystem detection successful.
*
* We do not want to read that many bytes from probed floppies, skip volumes
- * smaller than a usual floppy disk
+ * smaller than a usual floppy disk.
*/
if (size > 1440 * 1024) {
int found = 0;
int force_unique_result = 0;
+ int first_match = -1;
+ volume_id_reset_result(id);
for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++) {
int match;
match = (prober_filesystem[i].prober(id, off, size) == 0);
if (match) {
- info("signature '%s' detected\n", id->type);
+ info("signature '%s' %i detected\n", id->type, i);
if (id->force_unique_result)
- force_unique_result = id->force_unique_result;
+ force_unique_result = 1;
if (found && force_unique_result) {
info("conflicting signatures found, skip results\n");
return -1;
}
- found = 1;
+ found++;
+ if (first_match < 0)
+ first_match = i;
}
}
+ if (found < 1)
+ return -1;
+ if (found == 1)
+ goto found;
+ if (found > 1) {
+ volume_id_reset_result(id);
+ info("re-read first match metadata %i\n", first_match);
+ if (prober_filesystem[first_match].prober(id, off, size) == 0)
+ goto found;
+ return -1;
+ }
}
/* return the first match */
+ volume_id_reset_result(id);
for (i = 0; i < ARRAY_SIZE(prober_filesystem); i++) {
if (prober_filesystem[i].prober(id, off, size) == 0) {
info("signature '%s' detected\n", id->type);