ITS#7861 Re-fix MDB_db.md_entries.

mdb_cursor_del(): Fix md_entries with MDB_NODUPDATA.
mdb_cursor_put(): Check in xcursor whether an item got inserted. Count
data instead of keys after 13d6d59c512065db3741c20c65b4d9928b986968.

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 75e395e..cbf8c04 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -5797,7 +5797,7 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
        uint16_t        fp_flags;
        MDB_val         xdata, *rdata, dkey, olddata;
        MDB_db dummy;
-       int do_sub = 0, insert;
+       int do_sub = 0, insert_key, insert_data;
        unsigned int mcount = 0, dcount = 0, nospill;
        size_t nsize;
        int rc, rc2;
@@ -5916,8 +5916,8 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
                        return rc2;
        }
 
-       insert = rc;
-       if (insert) {
+       insert_key = insert_data = rc;
+       if (insert_key) {
                /* The key does not exist */
                DPRINTF(("inserting key at index %i", mc->mc_ki[mc->mc_top]));
                if ((mc->mc_db->md_flags & MDB_DUPSORT) &&
@@ -6078,7 +6078,7 @@ prep_subDB:
                        rdata = &xdata;
                        flags |= F_DUPDATA;
                        do_sub = 1;
-                       if (!insert)
+                       if (!insert_key)
                                mdb_node_del(mc, 0);
                        goto new_sub;
                }
@@ -6167,13 +6167,13 @@ new_sub:
        if (SIZELEFT(mc->mc_pg[mc->mc_top]) < nsize) {
                if (( flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA )
                        nflags &= ~MDB_APPEND;
-               if (!insert)
+               if (!insert_key)
                        nflags |= MDB_SPLIT_REPLACE;
                rc = mdb_page_split(mc, key, rdata, P_INVALID, nflags);
        } else {
                /* There is room already in this leaf page. */
                rc = mdb_node_add(mc, mc->mc_ki[mc->mc_top], key, rdata, 0, nflags);
-               if (rc == 0 && !do_sub && insert) {
+               if (rc == 0 && !do_sub && insert_key) {
                        /* Adjust other cursors pointing to mp */
                        MDB_cursor *m2, *m3;
                        MDB_dbi dbi = mc->mc_dbi;
@@ -6203,6 +6203,7 @@ new_sub:
                 */
                if (do_sub) {
                        int xflags;
+                       size_t ecount;
 put_sub:
                        xdata.mv_size = 0;
                        xdata.mv_data = "";
@@ -6238,6 +6239,7 @@ put_sub:
                                /* we've done our job */
                                dkey.mv_size = 0;
                        }
+                       ecount = mc->mc_xcursor->mx_db.md_entries;
                        if (flags & MDB_APPENDDUP)
                                xflags |= MDB_APPEND;
                        rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags);
@@ -6245,11 +6247,10 @@ put_sub:
                                void *db = NODEDATA(leaf);
                                memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db));
                        }
+                       insert_data = mc->mc_xcursor->mx_db.md_entries - ecount;
                }
-               /* sub-writes might have failed so check rc again.
-                * Don't increment count if we just replaced an existing item.
-                */
-               if (!rc && insert)
+               /* Increment count unless we just replaced an existing item. */
+               if (insert_data)
                        mc->mc_db->md_entries++;
                if (flags & MDB_MULTIPLE) {
                        if (!rc) {
@@ -6268,7 +6269,7 @@ done:
        /* If we succeeded and the key didn't exist before, make sure
         * the cursor is marked valid.
         */
-       if (!rc && insert)
+       if (!rc && insert_key)
                mc->mc_flags |= C_INITIALIZED;
        return rc;
 }
@@ -6302,7 +6303,10 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
        leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
 
        if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-               if (!(flags & MDB_NODUPDATA)) {
+               if (flags & MDB_NODUPDATA) {
+                       /* mdb_cursor_del0() will subtract the final entry */
+                       mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1;
+               } else {
                        if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) {
                                mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
                        }
@@ -6341,7 +6345,6 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
                        rc = mdb_drop0(&mc->mc_xcursor->mx_cursor, 0);
                        if (rc)
                                goto fail;
-                       mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries;
                }
        }