Commit a8de10d1 authored by Hallvard Furuseth's avatar Hallvard Furuseth
Browse files

ITS#7589 Fix me_nodemax and related node sizes.

Change me_nodemax to not count the mp_ptrs[] entry. That's mostly
how it was used. Compare node sizes ">" me_nodemax instead of ">=".
The ">=" was a workaround for confusing sizes with and without the
mp_ptrs[] entry, but broke for nodes with size (old me_nodemax-1).

Explicitly make me_nodemax even. An odd value could break the
comparisons. It was even anyway because MDB_MINKEYS == 2.
parent 6808abe7
......@@ -3491,7 +3491,8 @@ mdb_env_open2(MDB_env *env)
}
}
env->me_maxfree_1pg = (env->me_psize - PAGEHDRSZ) / sizeof(pgno_t) - 1;
env->me_nodemax = (env->me_psize - PAGEHDRSZ) / MDB_MINKEYS;
env->me_nodemax = (((env->me_psize - PAGEHDRSZ) / MDB_MINKEYS) & -2)
- sizeof(indx_t);
env->me_maxpg = env->me_mapsize / env->me_psize;
#if MDB_DEBUG
......@@ -5893,8 +5894,7 @@ more:
}
fp_flags = fp->mp_flags;
xdata.mv_size = olddata.mv_size + offset;
if (NODESIZE + sizeof(indx_t) + NODEKSZ(leaf) + xdata.mv_size
>= env->me_nodemax) {
if (NODESIZE+NODEKSZ(leaf)+xdata.mv_size > env->me_nodemax) {
/* yes, convert it */
if (mc->mc_db->md_flags & MDB_DUPFIXED) {
dummy.md_pad = fp->mp_pad;
......@@ -6255,7 +6255,7 @@ mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data)
size_t sz;
sz = LEAFSIZE(key, data);
if (sz >= env->me_nodemax) {
if (sz > env->me_nodemax) {
/* put on overflow page */
sz -= data->mv_size - sizeof(pgno_t);
}
......@@ -6279,7 +6279,7 @@ mdb_branch_size(MDB_env *env, MDB_val *key)
size_t sz;
sz = INDXSIZE(key);
if (sz >= env->me_nodemax) {
if (sz > env->me_nodemax) {
/* put on overflow page */
/* not implemented */
/* sz -= key->size - sizeof(pgno_t); */
......@@ -6348,7 +6348,7 @@ mdb_node_add(MDB_cursor *mc, indx_t indx,
if (F_ISSET(flags, F_BIGDATA)) {
/* Data already on overflow page. */
node_size += sizeof(pgno_t);
} else if (node_size + data->mv_size >= mc->mc_txn->mt_env->me_nodemax) {
} else if (node_size + data->mv_size > mc->mc_txn->mt_env->me_nodemax) {
int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize);
int rc;
/* Put data on overflow page. */
......
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