tdb2: TDB_SEQNUM and tdb_get_seqnum support.

[ccan] / ccan / tdb2 / private.h

diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h
index 4e7fc8ffeccaba5e2ab13348cf02a23bcbbb15bf..030b46ca38a2fbe1e4b751ebe7717133d98a37d3 100644 (file)
--- a/ccan/tdb2/private.h
+++ b/ccan/tdb2/private.h
@@ -246,7 +246,9 @@ struct tdb_header {
        uint64_t features_used; /* Features all writers understand */
        uint64_t features_offered; /* Features offered */
 
-       tdb_off_t reserved[24];
+       uint64_t seqnum; /* Sequence number for TDB_SEQNUM */
+
+       tdb_off_t reserved[23];
 
        /* Top level hash table. */
        tdb_off_t hashtable[1ULL << TDB_TOPLEVEL_HASH_BITS];
@@ -523,6 +525,9 @@ enum TDB_ERROR tdb_write_convert(struct tdb_context *tdb, tdb_off_t off,
 enum TDB_ERROR tdb_read_convert(struct tdb_context *tdb, tdb_off_t off,
                                void *rec, size_t len);
 
+/* Bump the seqnum (caller checks for tdb->flags & TDB_SEQNUM) */
+void tdb_inc_seqnum(struct tdb_context *tdb);
+
 /* Adds a stat, if it's in range. */
 void add_stat_(struct tdb_context *tdb, uint64_t *stat, size_t val);
 #define add_stat(tdb, statname, val)                                   \