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ITS#7789 Fix mdb_env_write_meta().

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Always write mapsize = max(other metapage:mapsize, env:mapsize).
This commit is contained in:
Hallvard Furuseth 2014-07-23 17:24:31 -07:00 committed by Howard Chu
parent 7ef970436d
commit 81b502e17e
1 changed files with 10 additions and 14 deletions
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24
libraries/liblmdb/mdb.c
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@ -3474,6 +3474,7 @@ mdb_env_write_meta(MDB_txn *txn)
{
MDB_env *env;
MDB_meta meta, metab, *mp;
size_t mapsize;
off_t off;
int rc, len, toggle;
char *ptr;
@ -3490,11 +3491,13 @@ mdb_env_write_meta(MDB_txn *txn)
env = txn->mt_env;
mp = env->me_metas[toggle];
mapsize = env->me_metas[toggle ^ 1]->mm_mapsize;
/* Persist any increases of mapsize config */
if (mapsize < env->me_mapsize)
mapsize = env->me_mapsize;
if (env->me_flags & MDB_WRITEMAP) {
/* Persist any increases of mapsize config */
if (env->me_mapsize > mp->mm_mapsize)
mp->mm_mapsize = env->me_mapsize;
mp->mm_mapsize = mapsize;
mp->mm_dbs[0] = txn->mt_dbs[0];
mp->mm_dbs[1] = txn->mt_dbs[1];
mp->mm_last_pg = txn->mt_next_pgno - 1;
@ -3521,22 +3524,15 @@ mdb_env_write_meta(MDB_txn *txn)
metab.mm_txnid = env->me_metas[toggle]->mm_txnid;
metab.mm_last_pg = env->me_metas[toggle]->mm_last_pg;
ptr = (char *)&meta;
if (env->me_mapsize > mp->mm_mapsize) {
/* Persist any increases of mapsize config */
meta.mm_mapsize = env->me_mapsize;
off = offsetof(MDB_meta, mm_mapsize);
} else {
off = offsetof(MDB_meta, mm_dbs[0].md_depth);
}
len = sizeof(MDB_meta) - off;
ptr += off;
meta.mm_mapsize = mapsize;
meta.mm_dbs[0] = txn->mt_dbs[0];
meta.mm_dbs[1] = txn->mt_dbs[1];
meta.mm_last_pg = txn->mt_next_pgno - 1;
meta.mm_txnid = txn->mt_txnid;
off = offsetof(MDB_meta, mm_mapsize);
ptr = (char *)&meta + off;
len = sizeof(MDB_meta) - off;
if (toggle)
off += env->me_psize;
off += PAGEHDRSZ;