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mdbx: fix MDB_CORRUPTED while walk/checking empty sub-db.

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This fixes https://github.com/ReOpen/libmdbx/issues/4
This commit is contained in:
Leo Yuriev 2016-11-21 18:38:26 +03:00
parent b7502306c1
commit 36b1ad02fb
1 changed files with 3 additions and 3 deletions
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6
mdbx.c
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@ -160,7 +160,7 @@ mdb_env_walk(mdb_walk_ctx_t *ctx, const char* dbi, pgno_t pg, int flags, int dee
const char* type;
if (pg == P_INVALID)
return MDB_CORRUPTED;
return MDB_SUCCESS; /* empty db */
rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL);
if (rc)
@ -292,9 +292,9 @@ mdbx_env_pgwalk(MDB_txn *txn, MDBX_pgvisitor_func* visitor, void* user)
rc = visitor(0, 2, user, "lmdb", "meta", 2, sizeof(MDB_meta)*2, PAGEHDRSZ*2,
(txn->mt_env->me_psize - sizeof(MDB_meta) - PAGEHDRSZ) *2);
if (! rc && txn->mt_dbs[FREE_DBI].md_root != P_INVALID)
if (! rc)
rc = mdb_env_walk(&ctx, "free", txn->mt_dbs[FREE_DBI].md_root, 0, 0);
if (! rc && txn->mt_dbs[MAIN_DBI].md_root != P_INVALID)
if (! rc)
rc = mdb_env_walk(&ctx, "main", txn->mt_dbs[MAIN_DBI].md_root, 0, 0);
if (! rc)
rc = visitor(P_INVALID, 0, user, NULL, NULL, 0, 0, 0, 0);