xfs: filter and record the unknown block state messages

Record the unknown block state messages that xfs_repair produces
when we nuke the finobt.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

common/repair

@@ -95,9 +95,18 @@ s/(stripe unit) \(.*\) (and width) \(.*\)/\1 (SU) \2 (SW)/;
 s/(superblock) (\d+)/\1 AGNO/;
 s/(AG \#)(\d+)/\1AGNO/;
 s/(reset bad sb for ag) (\d+)/\1 AGNO/;
+s/(unknown block state, ag )(\d+)(, block )(\d+)/\1AGNO\3AGBNO/;
 	print;'
 }
 
+# Filter out unknown block state messages that appear when rmap is enabled
+# and we erase a btree root pointer (such that repair never finds the
+# tree and fails to reconcile the metadata reverse mappings against the
+# metadata).
+_filter_repair_lostblocks() {
+	_filter_repair | sed -e '/unknown block state, ag AGNO, block AGBNO/d'
+}
+
 _filter_dd()
 {
 	fgrep -v records	# lose records in/out lines

tests/xfs/010

@@ -129,7 +129,7 @@ _check_scratch_fs
 # nuke the finobt root, repair will have to regenerate from the inobt
 _corrupt_finobt_root $SCRATCH_DEV
 
-_scratch_xfs_repair 2>&1 | _filter_repair
+_scratch_xfs_repair 2>&1 | _filter_repair_lostblocks
 
 status=0
 exit

tests/xfs/030

@@ -58,7 +58,7 @@ _check_ag()
 			    -e '/^bad agbno AGBNO for rmapbt/d' \
 			    -e '/^bad agbno AGBNO for refcntbt/d' \
 			    -e '/^Missing reverse-mapping record.*/d' \
-			    -e '/^unknown block state, ag 0, block.*/d'
+			    -e '/^unknown block state, ag AGNO, block.*/d'
 	done
 }