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Add superblock BLOCK_SIZE detection in tools.

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This commit is contained in:
Ondrej Kozina
2022-04-13 12:32:28 +02:00
committed by Milan Broz
parent 2388777763
commit f6452e1656
2 changed files with 52 additions and 0 deletions
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2
src/cryptsetup.h
View File

@@ -118,6 +118,8 @@ typedef enum {
int tools_detect_signatures(const char *device, tools_probe_filter_info filter, size_t *count, bool batch_mode);
int tools_wipe_all_signatures(const char *path);
int tools_superblock_block_size(const char *device, char *sb_name,
size_t sb_name_len, unsigned *r_block_size);
int tools_lookup_crypt_device(struct crypt_device *cd, const char *type,
const char *data_device_path, char **r_name);

50
src/utils_blockdev.c
View File

@@ -321,3 +321,53 @@ out:
blk_free(h);
return r;
}
int tools_superblock_block_size(const char *device, char *sb_name, size_t sb_name_len, unsigned *r_block_size)
{
struct blkid_handle *h;
const char *name;
int r = 0;
if (!r_block_size || !sb_name || sb_name_len < 1)
return -EINVAL;
if (!blk_supported()) {
log_dbg("Blkid support disabled.");
return 0;
}
if ((r = blk_init_by_path(&h, device))) {
log_err(_("Failed to initialize device signature probes."));
return -EINVAL;
}
blk_set_chains_for_superblocks(h);
switch (blk_probe(h)) {
case PRB_OK:
*r_block_size = blk_get_block_size(h);
if (!*r_block_size) /* same as not-found */
break;
if (!(name = blk_get_superblock_type(h))) {
r = -EINVAL;
break;
}
/* we don't mind truncating */
strncpy(sb_name, name, sb_name_len - 1);
sb_name[sb_name_len-1] = '\0';
log_dbg("Detected superblock %s on device %s (block size: %u).", sb_name, device, *r_block_size);
r = 1;
/* fall-through */
case PRB_EMPTY:
break;
default:
r = -EINVAL;
}
blk_free(h);
return r;
}