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-rw-r--r--lib/tdb/common/check.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/lib/tdb/common/check.c b/lib/tdb/common/check.c
index 3be8a0c48b..3ac2eb5105 100644
--- a/lib/tdb/common/check.c
+++ b/lib/tdb/common/check.c
@@ -326,9 +326,17 @@ int tdb_check(struct tdb_context *tdb,
struct tdb_record rec;
bool found_recovery = false;
tdb_len_t dead;
-
- if (tdb_lockall_read(tdb) == -1)
- return -1;
+ bool locked;
+
+ /* Read-only databases use no locking at all: it's best-effort.
+ * We may have a write lock already, so skip that case too. */
+ if (tdb->read_only || tdb->allrecord_lock.count != 0) {
+ locked = false;
+ } else {
+ if (tdb_lockall_read(tdb) == -1)
+ return -1;
+ locked = true;
+ }
/* Make sure we know true size of the underlying file. */
tdb->methods->tdb_oob(tdb, tdb->map_size + 1, 1);
@@ -443,12 +451,16 @@ int tdb_check(struct tdb_context *tdb,
}
free(hashes);
- tdb_unlockall_read(tdb);
+ if (locked) {
+ tdb_unlockall_read(tdb);
+ }
return 0;
free:
free(hashes);
unlock:
- tdb_unlockall_read(tdb);
+ if (locked) {
+ tdb_unlockall_read(tdb);
+ }
return -1;
}