libblkid: no more probe for btrfs backup superblock

 * Linux kernel cares about the first superblock only

 * backup superblock are FS specific stuff and there is no reason to
   care about it in generic tools

 * the problem with broken btrfs utils has been already fixed (it was
   possible to use the utils on filesystem with erased primary
   superblok without any warning message).

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 2 insertions, 8 deletions

diff --git a/libblkid/src/probe.c b/libblkid/src/probe.c
index 4b0c99796..e20c61bb1 100644
--- a/libblkid/src/probe.c
+++ b/libblkid/src/probe.c
@@ -934,7 +934,8 @@ int blkid_do_probe(blkid_probe pr)
  *
  * This function erases the current signature detected by @pr. The @pr has to
  * be open in O_RDWR mode, BLKID_SUBLKS_MAGIC or/and BLKID_PARTS_MAGIC flags
- * has to be enabled.
+ * has to be enabled (if you want to errase also superblock with broken check
+ * sums then use BLKID_SUBLKS_BADCSUM too).
  *
  * After successful signature removing the @pr prober will be moved one step
  * back and the next blkid_do_probe() call will again call previously called
@@ -1135,8 +1136,6 @@ int blkid_do_safeprobe(blkid_probe pr)
 
 	blkid_probe_start(pr);
 
-	pr->prob_flags |= BLKID_PROBE_FL_IGNORE_BACKUP;
-
 	for (i = 0; i < BLKID_NCHAINS; i++) {
 		struct blkid_chain *chn;
 
@@ -1809,8 +1808,3 @@ void blkid_probe_use_wiper(blkid_probe pr, blkid_loff_t off, blkid_loff_t size)
 		blkid_probe_chain_reset_vals(pr, chn);
 	}
 }
-
-int blkid_probe_ignore_backup(blkid_probe pr)
-{
-	return pr && (pr->prob_flags & BLKID_PROBE_FL_IGNORE_BACKUP);
-}