mirror of
https://github.com/isar/libmdbx.git
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lmdb: major rework of traversal b-tree for mdb_chk.
Change-Id: I9d382516f76092f44fc1a12d7554039582b87656
This commit is contained in:
Leo Yuriev
parent
8ff2458003
commit
15e0600b6c
8
lmdb.h
8
lmdb.h
@ -1658,10 +1658,10 @@ typedef void MDB_debug_func(int type, const char *function, int line,
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int mdb_setup_debug(int flags, MDB_debug_func* logger, long edge_txn);
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typedef int MDB_pgwalk_func(size_t pgno, unsigned pgnumber, void* ctx,
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const char* dbi, char type,
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int payload_bytes, int header_bytes);
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int mdb_env_pgwalk(MDB_txn *txn, MDB_pgwalk_func* visitor, void* ctx);
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typedef int MDB_pgvisitor_func(size_t pgno, unsigned pgnumber, void* ctx,
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const char* dbi, const char *type,
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int payload_bytes, int header_bytes, int unused_bytes);
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int mdb_env_pgwalk(MDB_txn *txn, MDB_pgvisitor_func* visitor, void* ctx);
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char* mdb_dkey(MDB_val *key, char *buf);
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239
mdb.c
239
mdb.c
@ -1472,8 +1472,7 @@ mdb_page_list(MDB_page *mp)
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key.mv_data = node->mn_data;
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nsize = NODESIZE + key.mv_size;
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if (IS_BRANCH(mp)) {
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mdb_print("key %d: page %zu, %s\n", i, NODEPGNO(node),
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DKEY(&key));
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mdb_print("key %d: page %zu, %s\n", i, NODEPGNO(node), DKEY(&key));
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total += nsize;
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} else {
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if (F_ISSET(node->mn_flags, F_BIGDATA))
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@ -9794,154 +9793,141 @@ mdb_env_get_oomfunc(MDB_env *env)
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struct mdb_walk_ctx {
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MDB_txn *mw_txn;
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void *mw_user;
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MDB_pgwalk_func *mw_visitor;
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MDB_pgvisitor_func *mw_visitor;
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};
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typedef struct mdb_walk_ctx mdb_walk_ctx_t;
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/** Depth-first tree traversal. */
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static int ESECT
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mdb_env_walk(mdb_walk_ctx_t *ctx, const char* dbi, pgno_t pg, int flags, int deep)
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{
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MDB_cursor mc;
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MDB_node *ni;
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MDB_page *mp;
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int rc;
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unsigned i;
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int rc, i, nkeys;
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unsigned header_size, unused_size, payload_size, align_bytes;
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const char* type;
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/* Empty DB, nothing to do */
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if (pg == P_INVALID)
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return MDB_SUCCESS;
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return MDB_CORRUPTED;
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if (deep < 2) {
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if ((rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL)) != 0)
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return rc;
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rc = ctx->mw_visitor(pg, 0, ctx->mw_user, dbi, 'R',
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ctx->mw_txn->mt_env->me_psize - PAGEHDRSZ - SIZELEFT(mp), PAGEHDRSZ);
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if (rc)
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return rc;
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}
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mc.mc_snum = 1;
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mc.mc_top = 0;
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mc.mc_txn = ctx->mw_txn;
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rc = mdb_page_get(ctx->mw_txn, pg, &mc.mc_pg[0], NULL);
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rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL);
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if (rc)
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return rc;
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if (pg != mp->mp_p.p_pgno)
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return MDB_CORRUPTED;
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for (mp = mc.mc_pg[mc.mc_top]; IS_BRANCH(mp); ) {
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MDB_node *node;
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nkeys = NUMKEYS(mp);
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header_size = IS_LEAF2(mp) ? PAGEHDRSZ : PAGEBASE + mp->mp_lower;
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unused_size = SIZELEFT(mp);
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payload_size = 0;
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rc = ctx->mw_visitor(mp->mp_p.p_pgno, 1, ctx->mw_user, dbi, 'B',
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ctx->mw_txn->mt_env->me_psize - PAGEHDRSZ - SIZELEFT(mp), PAGEHDRSZ);
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if (rc)
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return rc;
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if (NUMKEYS(mp) < 1)
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/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
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* Pages should not me marked dirty/loose or otherwise. */
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switch (mp->mp_flags) {
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case P_BRANCH:
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type = "branch";
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if (nkeys < 1)
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return MDB_CORRUPTED;
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mdb_debug("branch page %zu has %u keys", mp->mp_pgno, NUMKEYS(mp));
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mdb_cassert(&mc, NUMKEYS(mp) > 1);
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mdb_debug("found index 0 to page %zu", NODEPGNO(NODEPTR(mp, 0)));
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node = NODEPTR(mp, 0);
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if ((rc = mdb_page_get(mc.mc_txn, NODEPGNO(node), &mp, NULL)) != 0)
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return rc;
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mc.mc_ki[mc.mc_top] = 0;
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if ((rc = mdb_cursor_push(&mc, mp)))
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return rc;
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}
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if (!IS_LEAF(mp)) {
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mdb_debug("internal error, index points to a %02X page!?",
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mp->mp_flags);
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mc.mc_txn->mt_flags |= MDB_TXN_ERROR;
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break;
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case P_LEAF:
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type = "leaf";
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break;
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case P_LEAF|P_SUBP:
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type = "leaf-dupsort";
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break;
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case P_LEAF|P_LEAF2:
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/* #MDB_DUPFIXED records */
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type = "leaf-dupfixed";
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break;
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case P_LEAF|P_LEAF2|P_SUBP:
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/* #MDB_DUPSORT sub-pages */
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type = "leaf-dupfixed-dupsort";
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break;
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case P_META:
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case P_OVERFLOW:
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default:
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return MDB_CORRUPTED;
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}
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mc.mc_flags |= C_INITIALIZED;
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mc.mc_flags &= ~C_EOF;
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for (align_bytes = i = 0; i < nkeys;
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align_bytes += ((payload_size + align_bytes) & 1), i++) {
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MDB_node *node;
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rc = ctx->mw_visitor(mp->mp_p.p_pgno, 1, ctx->mw_user, dbi, 'L',
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ctx->mw_txn->mt_env->me_psize - PAGEHDRSZ - SIZELEFT(mp), PAGEHDRSZ);
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if (rc)
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return rc;
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while (mc.mc_snum > 0) {
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unsigned n;
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mp = mc.mc_pg[mc.mc_top];
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n = NUMKEYS(mp);
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if (IS_LEAF(mp)) {
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if (!IS_LEAF2(mp) && !(flags & F_DUPDATA)) {
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for (i = 0; i < n; i++) {
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ni = NODEPTR(mp, i);
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if (ni->mn_flags & F_BIGDATA) {
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MDB_page *omp;
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pgno_t *pg;
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pg = NODEDATA(ni);
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rc = mdb_page_get(ctx->mw_txn, *pg, &omp, NULL);
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if (rc)
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return rc;
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rc = ctx->mw_visitor(*pg, omp->mp_pages, ctx->mw_user, dbi, 'L',
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ctx->mw_txn->mt_env->me_psize - PAGEHDRSZ - SIZELEFT(mp), PAGEHDRSZ);
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if (rc)
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return rc;
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} else if (ni->mn_flags & F_SUBDATA) {
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MDB_db *db = NODEDATA(ni);
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char* name = NULL;
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if (! (ni->mn_flags & F_DUPDATA)) {
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name = NODEKEY(ni);
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int namelen = (char*) db - name;
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name = memcpy(alloca(namelen + 1), name, namelen);
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name[namelen] = 0;
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}
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rc = mdb_env_walk(ctx, (name && name[0]) ? name : dbi, db->md_root, ni->mn_flags & F_DUPDATA, deep + 1);
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if (rc)
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return rc;
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}
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}
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}
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} else {
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mc.mc_ki[mc.mc_top]++;
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if (mc.mc_ki[mc.mc_top] < n) {
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pgno_t pg;
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do {
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ni = NODEPTR(mp, mc.mc_ki[mc.mc_top]);
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pg = NODEPGNO(ni);
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rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL);
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if (rc)
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return rc;
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rc = ctx->mw_visitor(pg, 1, ctx->mw_user, dbi, IS_BRANCH(mp) ? 'B' : 'L',
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ctx->mw_txn->mt_env->me_psize - PAGEHDRSZ - SIZELEFT(mp), PAGEHDRSZ);
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if (rc)
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return rc;
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mc.mc_top++;
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mc.mc_snum++;
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mc.mc_ki[mc.mc_top] = 0;
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mc.mc_pg[mc.mc_top] = mp;
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}
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/* Whenever we advance to a sibling branch page,
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* we must proceed all the way down to its first leaf.
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*/
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while (IS_BRANCH(mp));
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continue;
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}
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if (IS_LEAF2(mp)) {
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/* LEAF2 pages have no mp_ptrs[] or node headers */
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payload_size += mp->mp_ksize;
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continue;
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}
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if (! mc.mc_top)
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break;
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node = NODEPTR(mp, i);
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payload_size += NODESIZE + node->mn_ksize;
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mdb_cursor_pop(&mc);
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if (IS_BRANCH(mp)) {
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rc = mdb_env_walk(ctx, dbi, NODEPGNO(node), flags, deep);
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if (rc)
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return rc;
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continue;
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}
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assert(IS_LEAF(mp));
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if (node->mn_ksize < 1)
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return MDB_CORRUPTED;
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if (node->mn_flags & F_BIGDATA) {
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MDB_page *omp;
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pgno_t *opg;
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size_t over_header, over_payload, over_unused;
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payload_size += sizeof(pgno_t);
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opg = NODEDATA(node);
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rc = mdb_page_get(ctx->mw_txn, *opg, &omp, NULL);
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if (rc)
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return rc;
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if (*opg != omp->mp_p.p_pgno)
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return MDB_CORRUPTED;
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/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
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* Pages should not me marked dirty/loose or otherwise. */
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if (P_OVERFLOW != omp->mp_flags)
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return MDB_CORRUPTED;
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over_header = PAGEHDRSZ;
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over_payload = NODEDSZ(node);
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over_unused = omp->mp_pages * ctx->mw_txn->mt_env->me_psize
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- over_payload - over_header;
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rc = ctx->mw_visitor(*opg, omp->mp_pages, ctx->mw_user, dbi, "overflow-data",
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over_payload, over_header, over_unused);
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if (rc)
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return rc;
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continue;
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}
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payload_size += NODEDSZ(node);
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if (node->mn_flags & F_SUBDATA) {
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MDB_db *db = NODEDATA(node);
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char* name = NULL;
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if (NODEDSZ(node) < 1)
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return MDB_CORRUPTED;
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if (! (node->mn_flags & F_DUPDATA)) {
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name = NODEKEY(node);
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int namelen = (char*) db - name;
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name = memcpy(alloca(namelen + 1), name, namelen);
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name[namelen] = 0;
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}
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rc = mdb_env_walk(ctx, (name && name[0]) ? name : dbi,
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db->md_root, node->mn_flags & F_DUPDATA, deep + 1);
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if (rc)
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return rc;
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}
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}
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return rc;
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return ctx->mw_visitor(mp->mp_p.p_pgno, 1, ctx->mw_user, dbi,
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type, payload_size, header_size, unused_size + align_bytes);
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}
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int ESECT
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mdb_env_pgwalk(MDB_txn *txn, MDB_pgwalk_func* visitor, void* user)
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mdb_env_pgwalk(MDB_txn *txn, MDB_pgvisitor_func* visitor, void* user)
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{
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mdb_walk_ctx_t ctx;
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int rc;
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@ -9950,13 +9936,14 @@ mdb_env_pgwalk(MDB_txn *txn, MDB_pgwalk_func* visitor, void* user)
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ctx.mw_user = user;
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ctx.mw_visitor = visitor;
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rc = visitor(0, 2, user, "meta", 'M', sizeof(MDB_meta), PAGEHDRSZ);
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if (! rc)
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rc = visitor(0, 2, user, "lmdb", "meta", sizeof(MDB_meta)*2, PAGEHDRSZ*2,
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(txn->mt_env->me_psize - sizeof(MDB_meta) - PAGEHDRSZ) *2);
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if (! rc && txn->mt_dbs[FREE_DBI].md_root != P_INVALID)
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rc = mdb_env_walk(&ctx, "free", txn->mt_dbs[FREE_DBI].md_root, 0, 0);
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if (! rc)
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if (! rc && txn->mt_dbs[MAIN_DBI].md_root != P_INVALID)
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rc = mdb_env_walk(&ctx, "main", txn->mt_dbs[MAIN_DBI].md_root, 0, 0);
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if (! rc)
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rc = visitor(P_INVALID, 0, user, NULL, 0, -1, 0);
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rc = visitor(P_INVALID, 0, user, NULL, NULL, -1, 0, 0);
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return rc;
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}
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75
mdb_chk.c
75
mdb_chk.c
@ -134,6 +134,10 @@ static int pagemap_lookup_dbi(const char* dbi) {
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return last = -1;
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walk.dbi_names[last] = strdup(dbi);
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if (verbose > 2)
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print(" - found '%s' area\n", dbi);
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return last;
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}
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@ -201,39 +205,55 @@ static size_t problems_pop(struct problem* list) {
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}
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static int pgvisitor(size_t pgno, unsigned pgnumber, void* ctx, const char* dbi,
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char type, int payload_bytes, int header_bytes)
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const char* type, int payload_bytes, int header_bytes, int unused_bytes)
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{
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if (pgnumber) {
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if (type) {
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size_t page_bytes = payload_bytes + header_bytes + unused_bytes;
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size_t page_size = pgnumber * stat.ms_psize;
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int index = pagemap_lookup_dbi(dbi);
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if (index < 0)
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return ENOMEM;
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if (verbose > 3) {
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print((pgnumber < 2) ? " %s-page %zu" : " %s-span %zu..%zu (%u pages)",
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type, pgno, pgno + pgnumber - 1, pgnumber);
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print(" of %s: header %i, payload %i, unused %i\n",
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dbi, header_bytes, payload_bytes, unused_bytes);
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}
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walk.pgcount += pgnumber;
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if (unused_bytes < 0 || (size_t) unused_bytes > page_size)
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problem_add(pgno, "illegal unused-bytes", "(%zu < %i < %zu)",
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0, unused_bytes, stat.ms_psize);
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if (header_bytes < sizeof(long) || header_bytes >= stat.ms_psize - sizeof(long))
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problem_add(pgno, "wrong header-length", "(%zu < %i < %zu)",
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sizeof(long), header_bytes, header_bytes >= stat.ms_psize - sizeof(long));
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problem_add(pgno, "illegal header-length", "(%zu < %i < %zu)",
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sizeof(long), header_bytes, stat.ms_psize - sizeof(long));
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else if (payload_bytes < 1)
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problem_add(pgno, "empty page", "(payload %zu bytes)", payload_bytes);
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else if (payload_bytes + header_bytes > pgnumber * stat.ms_psize)
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problem_add(pgno, "overflowed page", "(%zu + %zu > %zu)",
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payload_bytes, header_bytes, pgnumber * stat.ms_psize);
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problem_add(pgno, "empty page", "(payload %i bytes)", payload_bytes);
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if (page_bytes != page_size)
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problem_add(pgno, "misused page", "(%zu != %zu (%ih + %ip + %iu))",
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page_size, page_bytes, header_bytes, payload_bytes, unused_bytes);
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else {
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walk.dbi_payload_bytes[index] += payload_bytes + header_bytes;
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walk.total_payload_bytes += payload_bytes + header_bytes;
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}
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do {
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if (pgno >= lastpgno)
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problem_add(pgno, "wrong page-no", "(> %zi)", lastpgno);
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else if (walk.pagemap[pgno])
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problem_add(pgno, "page already used", "(in %s)", walk.dbi_names[walk.pagemap[pgno]]);
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else {
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walk.pagemap[pgno] = index;
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walk.dbi_pages[index] += 1;
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}
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++pgno;
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} while(--pgnumber);
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if (pgnumber) {
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do {
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if (pgno >= lastpgno)
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problem_add(pgno, "wrong page-no", "(> %zi)", lastpgno);
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else if (walk.pagemap[pgno])
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problem_add(pgno, "page already used", "(in %s)", walk.dbi_names[walk.pagemap[pgno]]);
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else {
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walk.pagemap[pgno] = index;
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walk.dbi_pages[index] += 1;
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}
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++pgno;
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} while(--pgnumber);
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}
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}
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return gotsignal ? EINTR : MDB_SUCCESS;
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@ -285,7 +305,7 @@ static int handle_freedb(size_t record_number, MDB_val *key, MDB_val* data) {
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for (; i >= span && iptr[i - span] == pg; span++, pg++) ;
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}
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if (verbose > 2)
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print(" - transaction %zu, %zd pages, maxspan %zd%s\n",
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print(" transaction %zu, %zd pages, maxspan %zd%s\n",
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*(size_t *)key->mv_data, number, span, bad);
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if (verbose > 3) {
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int j = number - 1;
|
||||
@ -655,8 +675,11 @@ int main(int argc, char *argv[])
|
||||
info.me_mapsize / k, sf[i]);
|
||||
if (info.me_mapaddr)
|
||||
print(" - mapaddr %p\n", info.me_mapaddr);
|
||||
print(" - pagesize %u, max keysize %zu, max readers %u\n",
|
||||
stat.ms_psize, maxkeysize, info.me_maxreaders);
|
||||
print(" - pagesize %u, max keysize %zu (%s), max readers %u\n",
|
||||
stat.ms_psize, maxkeysize,
|
||||
(maxkeysize == 511) ? "default" :
|
||||
(maxkeysize == 0) ? "devel" : "custom",
|
||||
info.me_maxreaders);
|
||||
print(" - transactions: last %zu, bottom %zu, lag reading %zi\n", info.me_last_txnid,
|
||||
info.me_tail_txnid, info.me_last_txnid - info.me_tail_txnid);
|
||||
|
||||
@ -712,6 +735,9 @@ int main(int argc, char *argv[])
|
||||
}
|
||||
|
||||
if (!dont_traversal) {
|
||||
struct problem* saved_list;
|
||||
size_t traversal_problems;
|
||||
|
||||
print("Traversal b-tree...\n");
|
||||
fflush(NULL);
|
||||
walk.pagemap = calloc(lastpgno, sizeof(*walk.pagemap));
|
||||
@ -721,7 +747,10 @@ int main(int argc, char *argv[])
|
||||
goto bailout;
|
||||
}
|
||||
|
||||
saved_list = problems_push();
|
||||
rc = mdb_env_pgwalk(txn, pgvisitor, NULL);
|
||||
traversal_problems = problems_pop(saved_list);
|
||||
|
||||
if (rc) {
|
||||
if (rc == EINTR && gotsignal) {
|
||||
print(" - interrupted by signal\n");
|
||||
@ -759,7 +788,7 @@ int main(int argc, char *argv[])
|
||||
}
|
||||
}
|
||||
print(" - summary: average fill %.1f%%, %zu problems\n",
|
||||
walk.total_payload_bytes * 100.0 / total_page_bytes, total_problems);
|
||||
walk.total_payload_bytes * 100.0 / total_page_bytes, traversal_problems);
|
||||
}
|
||||
} else if (verbose) {
|
||||
print("Skipping b-tree walk...\n");
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user