tdb2: TDB_SEQNUM and tdb_get_seqnum support.

[ccan] / ccan / tdb2 / tdb.c

diff --git a/ccan/tdb2/tdb.c b/ccan/tdb2/tdb.c
index 79ccd0f1c260cb476b35c146f15a9438f843a673..569c3d04de90241217754a9602da34f747eaa22b 100644 (file)
--- a/ccan/tdb2/tdb.c
+++ b/ccan/tdb2/tdb.c
@@ -63,7 +63,9 @@ static enum TDB_ERROR replace_data(struct tdb_context *tdb,
                return ecode;
        }
 
-       /* FIXME: tdb_increment_seqnum(tdb); */
+       if (tdb->flags & TDB_SEQNUM)
+               tdb_inc_seqnum(tdb);
+
        return TDB_SUCCESS;
 }
 
@@ -79,6 +81,9 @@ static enum TDB_ERROR update_data(struct tdb_context *tdb,
                /* Put a zero in; future versions may append other data. */
                ecode = tdb->methods->twrite(tdb, off + dbuf.dsize, "", 1);
        }
+       if (tdb->flags & TDB_SEQNUM)
+               tdb_inc_seqnum(tdb);
+
        return ecode;
 }
 
@@ -285,6 +290,9 @@ enum TDB_ERROR tdb_delete(struct tdb_context *tdb, struct tdb_data key)
                                + rec_data_length(&rec)
                                + rec_extra_padding(&rec));
 
+       if (tdb->flags & TDB_SEQNUM)
+               tdb_inc_seqnum(tdb);
+
 unlock:
        tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
        return ecode;
@@ -313,6 +321,9 @@ void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
        case TDB_NOSYNC:
                tdb->flags |= TDB_NOSYNC;
                break;
+       case TDB_SEQNUM:
+               tdb->flags |= TDB_SEQNUM;
+               break;
        default:
                tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
                           "tdb_add_flag: Unknown flag %u", flag);
@@ -337,6 +348,9 @@ void tdb_remove_flag(struct tdb_context *tdb, unsigned flag)
        case TDB_NOSYNC:
                tdb->flags &= ~TDB_NOSYNC;
                break;
+       case TDB_SEQNUM:
+               tdb->flags &= ~TDB_SEQNUM;
+               break;
        default:
                tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
                           "tdb_remove_flag: Unknown flag %u", flag);
@@ -433,6 +447,12 @@ const char *tdb_name(const struct tdb_context *tdb)
        return tdb->name;
 }
 
+int64_t tdb_get_seqnum(struct tdb_context *tdb)
+{
+       return tdb_read_off(tdb, offsetof(struct tdb_header, seqnum));
+}
+       
+
 int tdb_fd(const struct tdb_context *tdb)
 {
        return tdb->file->fd;