tdb: Vectorize _tdb_store

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c
index b85451667c1dc07b2ed247c4f75df35f827f586c..6d4ad6d005c41720e06a10711c08a486b1313f38 100644 (file)
--- a/lib/tdb/common/tdb.c
+++ b/lib/tdb/common/tdb.c
@@ -526,16 +526,30 @@ tdb_off_t tdb_find_dead(struct tdb_context *tdb, uint32_t hash,
        return best_rec_ptr;
 }
 
-static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
-                      TDB_DATA dbuf, int flag, uint32_t hash)
+static int _tdb_storev(struct tdb_context *tdb, TDB_DATA key,
+                      const TDB_DATA *dbufs, int num_dbufs,
+                      int flag, uint32_t hash)
 {
        struct tdb_record rec;
-       tdb_off_t rec_ptr;
-       tdb_len_t rec_len;
+       tdb_off_t rec_ptr, ofs;
+       tdb_len_t rec_len, dbufs_len;
+       int i;
        int ret = -1;
 
-       rec_len = key.dsize + dbuf.dsize;
-       if ((rec_len < key.dsize) || (rec_len < dbuf.dsize)) {
+       dbufs_len = 0;
+
+       for (i=0; i<num_dbufs; i++) {
+               size_t dsize = dbufs[i].dsize;
+
+               dbufs_len += dsize;
+               if (dbufs_len < dsize) {
+                       tdb->ecode = TDB_ERR_OOM;
+                       goto fail;
+               }
+       }
+
+       rec_len = key.dsize + dbufs_len;
+       if ((rec_len < key.dsize) || (rec_len < dbufs_len)) {
                tdb->ecode = TDB_ERR_OOM;
                goto fail;
        }
@@ -548,8 +562,8 @@ static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
                }
        } else {
                /* first try in-place update, on modify or replace. */
-               if (tdb_update_hash(tdb, key, hash, &dbuf, 1,
-                                   dbuf.dsize) == 0) {
+               if (tdb_update_hash(tdb, key, hash, dbufs, num_dbufs,
+                                   dbufs_len) == 0) {
                        goto done;
                }
                if (tdb->ecode == TDB_ERR_NOEXIST &&
@@ -580,17 +594,36 @@ static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
                goto fail;
 
        rec.key_len = key.dsize;
-       rec.data_len = dbuf.dsize;
+       rec.data_len = dbufs_len;
        rec.full_hash = hash;
        rec.magic = TDB_MAGIC;
 
+       ofs = rec_ptr;
+
        /* write out and point the top of the hash chain at it */
-       if (tdb_rec_write(tdb, rec_ptr, &rec) == -1
-           || tdb->methods->tdb_write(tdb, rec_ptr+sizeof(rec),
-                                      key.dptr, key.dsize) == -1
-           || tdb->methods->tdb_write(tdb, rec_ptr+sizeof(rec)+key.dsize,
-                                      dbuf.dptr, dbuf.dsize) == -1
-           || tdb_ofs_write(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1) {
+       ret = tdb_rec_write(tdb, ofs, &rec);
+       if (ret == -1) {
+               goto fail;
+       }
+       ofs += sizeof(rec);
+
+       ret = tdb->methods->tdb_write(tdb, ofs, key.dptr, key.dsize);
+       if (ret == -1) {
+               goto fail;
+       }
+       ofs += key.dsize;
+
+       for (i=0; i<num_dbufs; i++) {
+               ret = tdb->methods->tdb_write(tdb, ofs, dbufs[i].dptr,
+                                             dbufs[i].dsize);
+               if (ret == -1) {
+                       goto fail;
+               }
+               ofs += dbufs[i].dsize;
+       }
+
+       ret = tdb_ofs_write(tdb, TDB_HASH_TOP(hash), &rec_ptr);
+       if (ret == -1) {
                /* Need to tdb_unallocate() here */
                goto fail;
        }
@@ -604,6 +637,12 @@ static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
        return ret;
 }
 
+static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
+                     TDB_DATA dbuf, int flag, uint32_t hash)
+{
+       return _tdb_storev(tdb, key, &dbuf, 1, flag, hash);
+}
+
 /* store an element in the database, replacing any existing element
    with the same key