tdb2: add write flag to tdb_direct

[ccan] / ccan / tdb2 / private.h

diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h
index b77d70c3ce6b0afa47eec11e2838a4cbbf4284ca..b60f33a0a2012224d9e3192090cad82dd1d76d64 100644 (file)
--- a/ccan/tdb2/private.h
+++ b/ccan/tdb2/private.h
@@ -91,6 +91,8 @@ typedef uint64_t tdb_off_t;
 #define TDB_SUBLEVEL_HASH_BITS 6
 /* And 8 entries in each group, ie 8 groups per sublevel. */
 #define TDB_HASH_GROUP_BITS 3
+/* This is currently 10: beyond this we chain. */
+#define TDB_MAX_LEVELS (1+(64-TDB_TOPLEVEL_HASH_BITS) / TDB_SUBLEVEL_HASH_BITS)
 
 /* Extend file by least 100 times larger than needed. */
 #define TDB_EXTENSION_FACTOR 100
@@ -212,6 +214,12 @@ struct tdb_recovery_record {
        uint64_t eof;
 };
 
+/* If we bottom out of the subhashes, we chain. */
+struct tdb_chain {
+       tdb_off_t rec[1 << TDB_HASH_GROUP_BITS];
+       tdb_off_t next;
+};
+
 /* this is stored at the front of every database */
 struct tdb_header {
        char magic_food[64]; /* for /etc/magic */
@@ -259,7 +267,7 @@ struct traverse_info {
                /* We ignore groups here, and treat it as a big array. */
                unsigned entry;
                unsigned int total_buckets;
-       } levels[64 / TDB_SUBLEVEL_HASH_BITS];
+       } levels[TDB_MAX_LEVELS + 1];
        unsigned int num_levels;
        unsigned int toplevel_group;
        /* This makes delete-everything-inside-traverse work as expected. */
@@ -347,7 +355,7 @@ struct tdb_methods {
        int (*write)(struct tdb_context *, tdb_off_t, const void *, tdb_len_t);
        int (*oob)(struct tdb_context *, tdb_off_t, bool);
        int (*expand_file)(struct tdb_context *, tdb_len_t);
-       void *(*direct)(struct tdb_context *, tdb_off_t, size_t);
+       void *(*direct)(struct tdb_context *, tdb_off_t, size_t, bool);
 };
 
 /*