[t:2449] Bugfix in cachetable pairs for rollback log nodes.

We were using TOKUTXNs as the extraarg, but the TOKUTXN struct could be freed while the pair is still in memory.
We only used the TOKUTXN to get the cachefile and header.  We already are given the cachefile, so we
made the extraargs be the header

git-svn-id: file:///svn/toku/tokudb@19238 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-internal.h

@@ -220,7 +220,7 @@ int toku_serialize_brtnode_to(int fd, BLOCKNUM, BRTNODE node, struct brt_header
 int toku_serialize_rollback_log_to (int fd, BLOCKNUM blocknum, ROLLBACK_LOG_NODE log,
                                     struct brt_header *h, int n_workitems, int n_threads,
                                     BOOL for_checkpoint);
-int toku_deserialize_rollback_log_from (int fd, BLOCKNUM blocknum, u_int32_t fullhash, ROLLBACK_LOG_NODE *logp, TOKUTXN txn, struct brt_header *h);
+int toku_deserialize_rollback_log_from (int fd, BLOCKNUM blocknum, u_int32_t fullhash, ROLLBACK_LOG_NODE *logp, struct brt_header *h);
 int toku_deserialize_brtnode_from (int fd, BLOCKNUM off, u_int32_t /*fullhash*/, BRTNODE *brtnode, struct brt_header *h);
 unsigned int toku_serialize_brtnode_size(BRTNODE node); /* How much space will it take? */
 int toku_keycompare (bytevec key1, ITEMLEN key1len, bytevec key2, ITEMLEN key2len);

newbrt/brt-serialize.c

@@ -1746,7 +1746,7 @@ toku_serialize_rollback_log_to (int fd, BLOCKNUM blocknum, ROLLBACK_LOG_NODE log
 
 static int
 deserialize_rollback_log_from_rbuf (BLOCKNUM blocknum, u_int32_t fullhash, ROLLBACK_LOG_NODE *log_p,
-                                    TOKUTXN txn, struct brt_header *h, struct rbuf *rb) {
+                                    struct brt_header *h, struct rbuf *rb) {
     TAGMALLOC(ROLLBACK_LOG_NODE, result);
     int r;
     if (result==NULL) {
@@ -1769,10 +1769,6 @@ deserialize_rollback_log_from_rbuf (BLOCKNUM blocknum, u_int32_t fullhash, ROLLB
     //TODO: This is hard.. everything is shared in a single dictionary.
     rbuf_TXNID(rb, &result->txnid);
     result->sequence = rbuf_ulonglong(rb);
-    if (result->txnid == txn->txnid64 && result->sequence > txn->num_rollback_nodes) {
-        r = toku_db_badformat();
-        goto died0;
-    }
     result->thislogname = rbuf_blocknum(rb);
     if (result->thislogname.b != blocknum.b) {
         r = toku_db_badformat();
@@ -1827,7 +1823,7 @@ deserialize_rollback_log_from_rbuf (BLOCKNUM blocknum, u_int32_t fullhash, ROLLB
 static int
 deserialize_rollback_log_from_rbuf_versioned (u_int32_t version, BLOCKNUM blocknum, u_int32_t fullhash,
                                               ROLLBACK_LOG_NODE *log,
-                                              TOKUTXN txn, struct brt_header *h, struct rbuf *rb) {
+                                              struct brt_header *h, struct rbuf *rb) {
     int r = 0;
     ROLLBACK_LOG_NODE rollback_log_node = NULL;
 
@@ -1835,7 +1831,7 @@ deserialize_rollback_log_from_rbuf_versioned (u_int32_t version, BLOCKNUM blockn
     switch (version) {
         case BRT_LAYOUT_VERSION:
             if (!upgrade)
-                r = deserialize_rollback_log_from_rbuf(blocknum, fullhash, &rollback_log_node, txn, h, rb);
+                r = deserialize_rollback_log_from_rbuf(blocknum, fullhash, &rollback_log_node, h, rb);
             if (r==0) {
                 assert(rollback_log_node);
                 *log = rollback_log_node;
@@ -1851,7 +1847,7 @@ deserialize_rollback_log_from_rbuf_versioned (u_int32_t version, BLOCKNUM blockn
 // Read rollback log node from file into struct.  Perform version upgrade if necessary.
 int
 toku_deserialize_rollback_log_from (int fd, BLOCKNUM blocknum, u_int32_t fullhash,
-                                    ROLLBACK_LOG_NODE *logp, TOKUTXN txn, struct brt_header *h) {
+                                    ROLLBACK_LOG_NODE *logp, struct brt_header *h) {
     toku_trace("deserial start");
 
     int r;
@@ -1869,7 +1865,7 @@ toku_deserialize_rollback_log_from (int fd, BLOCKNUM blocknum, u_int32_t fullhas
         }
     }
 
-    r = deserialize_rollback_log_from_rbuf_versioned(layout_version, blocknum, fullhash, logp, txn, h, &rb);
+    r = deserialize_rollback_log_from_rbuf_versioned(layout_version, blocknum, fullhash, logp, h, &rb);
 
     toku_trace("deserial done");
 

newbrt/rollback.c

@@ -322,15 +322,13 @@ toku_rollback_log_free(ROLLBACK_LOG_NODE *log_p) {
 static void toku_rollback_flush_callback (CACHEFILE cachefile, int fd, BLOCKNUM logname,
                                           void *rollback_v, void *extraargs, long UU(size),
                                           BOOL write_me, BOOL keep_me, BOOL for_checkpoint) {
-    assert(extraargs);
     int r;
-    TOKUTXN            txn = extraargs;
     ROLLBACK_LOG_NODE  log = rollback_v;
-    CACHEFILE          rollback_cachefile = txn->logger->rollback_cachefile;
-    struct brt_header *h = toku_cachefile_get_userdata(rollback_cachefile);
+    struct brt_header *h   = extraargs;
 
+    assert(h->cf == cachefile);
     assert(log->thislogname.b==logname.b);
-    assert(rollback_cachefile == cachefile);
+
     if (write_me && !h->panic) {
         int n_workitems, n_threads; 
         toku_cachefile_get_workqueue_load(cachefile, &n_workitems, &n_threads);
@@ -354,15 +352,12 @@ static void toku_rollback_flush_callback (CACHEFILE cachefile, int fd, BLOCKNUM
 
 static int toku_rollback_fetch_callback (CACHEFILE cachefile, int fd, BLOCKNUM logname, u_int32_t fullhash,
                                       void **rollback_pv, long *sizep, void *extraargs) {
-    assert(extraargs);
     int r;
-    TOKUTXN            txn = extraargs;
-    CACHEFILE          rollback_cachefile = txn->logger->rollback_cachefile;
-    struct brt_header *h = toku_cachefile_get_userdata(rollback_cachefile);
-    assert(rollback_cachefile == cachefile);
+    struct brt_header *h = extraargs;
+    assert(h->cf == cachefile);
 
     ROLLBACK_LOG_NODE *result = (ROLLBACK_LOG_NODE*)rollback_pv;
-    r = toku_deserialize_rollback_log_from(fd, logname, fullhash, result, txn, h);
+    r = toku_deserialize_rollback_log_from(fd, logname, fullhash, result, h);
     if (r==0) {
         *sizep = rollback_memory_size(*result);
     }
@@ -396,7 +391,7 @@ static int toku_create_new_rollback_log (TOKUTXN txn, BLOCKNUM older, uint32_t o
     r=toku_cachetable_put(cf, log->thislogname, log->thishash,
                           log, rollback_memory_size(log),
                           toku_rollback_flush_callback, toku_rollback_fetch_callback,
-                          txn);
+                          h);
     assert(r==0);
     txn->current_rollback      = log->thislogname;
     txn->current_rollback_hash = log->thishash;
@@ -602,10 +597,11 @@ toku_maybe_prefetch_older_rollback_log(TOKUTXN txn, ROLLBACK_LOG_NODE log) {
     if (name.b != ROLLBACK_NONE.b) {
         uint32_t hash = log->older_hash;
         CACHEFILE cf = txn->logger->rollback_cachefile;
+        struct brt_header *h = toku_cachefile_get_userdata(cf);
         r = toku_cachefile_prefetch(cf, name, hash,
                                     toku_rollback_flush_callback,
                                     toku_rollback_fetch_callback,
-                                    txn);
+                                    h);
         assert(r==0);
     }
     return r;
@@ -625,10 +621,11 @@ int toku_get_and_pin_rollback_log(TOKUTXN txn, TXNID xid, uint64_t sequence, BLO
     if (!log) {
         CACHEFILE cf = txn->logger->rollback_cachefile;
         void * log_v;
+        struct brt_header *h = toku_cachefile_get_userdata(cf);
         r = toku_cachetable_get_and_pin(cf, name, hash,
                                         &log_v, NULL,
                                         toku_rollback_flush_callback, toku_rollback_fetch_callback,
-                                        txn);
+                                        h);
         assert(r==0);
         log = (ROLLBACK_LOG_NODE)log_v;
     }