1 files changed, 3876 insertions, 0 deletions

diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
new file mode 100644
index 000000000000..c9ad3a7849f4
--- /dev/null
+++ b/fs/reiserfs/journal.c
@@ -0,0 +1,3876 @@
+/*
+** Write ahead logging implementation copyright Chris Mason 2000
+**
+** The background commits make this code very interelated, and 
+** overly complex.  I need to rethink things a bit....The major players:
+**
+** journal_begin -- call with the number of blocks you expect to log.  
+**                  If the current transaction is too
+**                  old, it will block until the current transaction is 
+**                  finished, and then start a new one.
+**                  Usually, your transaction will get joined in with 
+**                  previous ones for speed.
+**
+** journal_join  -- same as journal_begin, but won't block on the current 
+**                  transaction regardless of age.  Don't ever call
+**                  this.  Ever.  There are only two places it should be 
+**                  called from, and they are both inside this file.
+**
+** journal_mark_dirty -- adds blocks into this transaction.  clears any flags 
+**                       that might make them get sent to disk
+**                       and then marks them BH_JDirty.  Puts the buffer head 
+**                       into the current transaction hash.  
+**
+** journal_end -- if the current transaction is batchable, it does nothing
+**                   otherwise, it could do an async/synchronous commit, or
+**                   a full flush of all log and real blocks in the 
+**                   transaction.
+**
+** flush_old_commits -- if the current transaction is too old, it is ended and 
+**                      commit blocks are sent to disk.  Forces commit blocks 
+**                      to disk for all backgrounded commits that have been 
+**                      around too long.
+**                   -- Note, if you call this as an immediate flush from 
+**                      from within kupdate, it will ignore the immediate flag
+*/
+
+#include <linux/config.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#include <linux/time.h>
+#include <asm/semaphore.h>
+
+#include <linux/vmalloc.h>
+#include <linux/reiserfs_fs.h>
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <linux/workqueue.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+
+
+/* gets a struct reiserfs_journal_list * from a list head */
+#define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
+                               j_list))
+#define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
+                               j_working_list))
+
+/* the number of mounted filesystems.  This is used to decide when to
+** start and kill the commit workqueue
+*/
+static int reiserfs_mounted_fs_count;
+
+static struct workqueue_struct *commit_wq;
+
+#define JOURNAL_TRANS_HALF 1018   /* must be correct to keep the desc and commit
+                                     structs at 4k */
+#define BUFNR 64 /*read ahead */
+
+/* cnode stat bits.  Move these into reiserfs_fs.h */
+
+#define BLOCK_FREED 2           /* this block was freed, and can't be written.  */
+#define BLOCK_FREED_HOLDER 3    /* this block was freed during this transaction, and can't be written */
+
+#define BLOCK_NEEDS_FLUSH 4     /* used in flush_journal_list */
+#define BLOCK_DIRTIED 5
+
+
+/* journal list state bits */
+#define LIST_TOUCHED 1
+#define LIST_DIRTY   2
+#define LIST_COMMIT_PENDING  4          /* someone will commit this list */
+
+/* flags for do_journal_end */
+#define FLUSH_ALL   1           /* flush commit and real blocks */
+#define COMMIT_NOW  2           /* end and commit this transaction */
+#define WAIT        4           /* wait for the log blocks to hit the disk*/
+
+static int do_journal_end(struct reiserfs_transaction_handle *,struct super_block *,unsigned long nblocks,int flags) ;
+static int flush_journal_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) ;
+static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall)  ;
+static int can_dirty(struct reiserfs_journal_cnode *cn) ;
+static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks);
+static int release_journal_dev( struct super_block *super,
+                                struct reiserfs_journal *journal );
+static int dirty_one_transaction(struct super_block *s,
+                                 struct reiserfs_journal_list *jl);
+static void flush_async_commits(void *p);
+static void queue_log_writer(struct super_block *s);
+
+/* values for join in do_journal_begin_r */
+enum {
+    JBEGIN_REG = 0, /* regular journal begin */
+    JBEGIN_JOIN = 1, /* join the running transaction if at all possible */
+    JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */
+};
+
+static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
+                             struct super_block * p_s_sb,
+                             unsigned long nblocks,int join);
+
+static void init_journal_hash(struct super_block *p_s_sb) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  memset(journal->j_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ;
+}
+
+/*
+** clears BH_Dirty and sticks the buffer on the clean list.  Called because I can't allow refile_buffer to
+** make schedule happen after I've freed a block.  Look at remove_from_transaction and journal_mark_freed for
+** more details.
+*/
+static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) {
+  if (bh) {
+    clear_buffer_dirty(bh);
+    clear_buffer_journal_test(bh);
+  }
+  return 0 ;
+}
+
+static void disable_barrier(struct super_block *s)
+{
+    REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_BARRIER_FLUSH);
+    printk("reiserfs: disabling flush barriers on %s\n", reiserfs_bdevname(s));
+}
+
+static struct reiserfs_bitmap_node *
+allocate_bitmap_node(struct super_block *p_s_sb) {
+  struct reiserfs_bitmap_node *bn ;
+  static int id;
+
+  bn = reiserfs_kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS, p_s_sb) ;
+  if (!bn) {
+    return NULL ;
+  }
+  bn->data = reiserfs_kmalloc(p_s_sb->s_blocksize, GFP_NOFS, p_s_sb) ;
+  if (!bn->data) {
+    reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ;
+    return NULL ;
+  }
+  bn->id = id++ ;
+  memset(bn->data, 0, p_s_sb->s_blocksize) ;
+  INIT_LIST_HEAD(&bn->list) ;
+  return bn ;
+}
+
+static struct reiserfs_bitmap_node *
+get_bitmap_node(struct super_block *p_s_sb) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_bitmap_node *bn = NULL;
+  struct list_head *entry = journal->j_bitmap_nodes.next ;
+
+  journal->j_used_bitmap_nodes++ ;
+repeat:
+
+  if(entry != &journal->j_bitmap_nodes) {
+    bn = list_entry(entry, struct reiserfs_bitmap_node, list) ;
+    list_del(entry) ;
+    memset(bn->data, 0, p_s_sb->s_blocksize) ;
+    journal->j_free_bitmap_nodes-- ;
+    return bn ;
+  }
+  bn = allocate_bitmap_node(p_s_sb) ;
+  if (!bn) {
+    yield();
+    goto repeat ;
+  }
+  return bn ;
+}
+static inline void free_bitmap_node(struct super_block *p_s_sb,
+                                    struct reiserfs_bitmap_node *bn) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  journal->j_used_bitmap_nodes-- ;
+  if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) {
+    reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ;
+    reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ;
+  } else {
+    list_add(&bn->list, &journal->j_bitmap_nodes) ;
+    journal->j_free_bitmap_nodes++ ;
+  }
+}
+
+static void allocate_bitmap_nodes(struct super_block *p_s_sb) {
+  int i ;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_bitmap_node *bn = NULL ;
+  for (i = 0 ; i < REISERFS_MIN_BITMAP_NODES ; i++) {
+    bn = allocate_bitmap_node(p_s_sb) ;
+    if (bn) {
+      list_add(&bn->list, &journal->j_bitmap_nodes) ;
+      journal->j_free_bitmap_nodes++ ;
+    } else {
+      break ; // this is ok, we'll try again when more are needed 
+    }
+  }
+}
+
+static int set_bit_in_list_bitmap(struct super_block *p_s_sb, int block,
+                                  struct reiserfs_list_bitmap *jb) {
+  int bmap_nr = block / (p_s_sb->s_blocksize << 3) ;
+  int bit_nr = block % (p_s_sb->s_blocksize << 3) ;
+
+  if (!jb->bitmaps[bmap_nr]) {
+    jb->bitmaps[bmap_nr] = get_bitmap_node(p_s_sb) ;
+  }
+  set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data) ;
+  return 0 ;
+}
+
+static void cleanup_bitmap_list(struct super_block *p_s_sb,
+                                struct reiserfs_list_bitmap *jb) {
+  int i;
+  if (jb->bitmaps == NULL)
+    return;
+
+  for (i = 0 ; i < SB_BMAP_NR(p_s_sb) ; i++) {
+    if (jb->bitmaps[i]) {
+      free_bitmap_node(p_s_sb, jb->bitmaps[i]) ;
+      jb->bitmaps[i] = NULL ;
+    }
+  }
+}
+
+/*
+** only call this on FS unmount.
+*/
+static int free_list_bitmaps(struct super_block *p_s_sb,
+                             struct reiserfs_list_bitmap *jb_array) {
+  int i ;
+  struct reiserfs_list_bitmap *jb ;
+  for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) {
+    jb = jb_array + i ;
+    jb->journal_list = NULL ;
+    cleanup_bitmap_list(p_s_sb, jb) ;
+    vfree(jb->bitmaps) ;
+    jb->bitmaps = NULL ;
+  }
+  return 0;
+}
+
+static int free_bitmap_nodes(struct super_block *p_s_sb) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct list_head *next = journal->j_bitmap_nodes.next ;
+  struct reiserfs_bitmap_node *bn ;
+
+  while(next != &journal->j_bitmap_nodes) {
+    bn = list_entry(next, struct reiserfs_bitmap_node, list) ;
+    list_del(next) ;
+    reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ;
+    reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ;
+    next = journal->j_bitmap_nodes.next ;
+    journal->j_free_bitmap_nodes-- ;
+  }
+
+  return 0 ;
+}
+
+/*
+** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. 
+** jb_array is the array to be filled in.
+*/
+int reiserfs_allocate_list_bitmaps(struct super_block *p_s_sb,
+                                   struct reiserfs_list_bitmap *jb_array,
+                                   int bmap_nr) {
+  int i ;
+  int failed = 0 ;
+  struct reiserfs_list_bitmap *jb ;
+  int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *) ;
+
+  for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) {
+    jb = jb_array + i ;
+    jb->journal_list = NULL ;
+    jb->bitmaps = vmalloc( mem ) ;
+    if (!jb->bitmaps) {
+      reiserfs_warning(p_s_sb, "clm-2000, unable to allocate bitmaps for journal lists") ;
+      failed = 1;   
+      break ;
+    }
+    memset(jb->bitmaps, 0, mem) ;
+  }
+  if (failed) {
+    free_list_bitmaps(p_s_sb, jb_array) ;
+    return -1 ;
+  }
+  return 0 ;
+}
+
+/*
+** find an available list bitmap.  If you can't find one, flush a commit list 
+** and try again
+*/
+static struct reiserfs_list_bitmap *
+get_list_bitmap(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) {
+  int i,j ; 
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_list_bitmap *jb = NULL ;
+
+  for (j = 0 ; j < (JOURNAL_NUM_BITMAPS * 3) ; j++) {
+    i = journal->j_list_bitmap_index ;
+    journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS ;
+    jb = journal->j_list_bitmap + i ;
+    if (journal->j_list_bitmap[i].journal_list) {
+      flush_commit_list(p_s_sb, journal->j_list_bitmap[i].journal_list, 1) ;
+      if (!journal->j_list_bitmap[i].journal_list) {
+        break ;
+      }
+    } else {
+      break ;
+    }
+  }
+  if (jb->journal_list) { /* double check to make sure if flushed correctly */
+    return NULL ;
+  }
+  jb->journal_list = jl ;
+  return jb ;
+}
+
+/* 
+** allocates a new chunk of X nodes, and links them all together as a list.
+** Uses the cnode->next and cnode->prev pointers
+** returns NULL on failure
+*/
+static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) {
+  struct reiserfs_journal_cnode *head ;
+  int i ;
+  if (num_cnodes <= 0) {
+    return NULL ;
+  }
+  head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)) ;
+  if (!head) {
+    return NULL ;
+  }
+  memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode)) ;
+  head[0].prev = NULL ;
+  head[0].next = head + 1 ;
+  for (i = 1 ; i < num_cnodes; i++) {
+    head[i].prev = head + (i - 1) ;
+    head[i].next = head + (i + 1) ; /* if last one, overwrite it after the if */
+  }
+  head[num_cnodes -1].next = NULL ;
+  return head ;
+}
+
+/*
+** pulls a cnode off the free list, or returns NULL on failure 
+*/
+static struct reiserfs_journal_cnode *get_cnode(struct super_block *p_s_sb) {
+  struct reiserfs_journal_cnode *cn ;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+  reiserfs_check_lock_depth(p_s_sb, "get_cnode") ;
+
+  if (journal->j_cnode_free <= 0) {
+    return NULL ;
+  }
+  journal->j_cnode_used++ ;
+  journal->j_cnode_free-- ;
+  cn = journal->j_cnode_free_list ;
+  if (!cn) {
+    return cn ;
+  }
+  if (cn->next) {
+    cn->next->prev = NULL ;
+  }
+  journal->j_cnode_free_list = cn->next ;
+  memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ;
+  return cn ;
+}
+
+/*
+** returns a cnode to the free list 
+*/
+static void free_cnode(struct super_block *p_s_sb, struct reiserfs_journal_cnode *cn) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+  reiserfs_check_lock_depth(p_s_sb, "free_cnode") ;
+
+  journal->j_cnode_used-- ;
+  journal->j_cnode_free++ ;
+  /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
+  cn->next = journal->j_cnode_free_list ;
+  if (journal->j_cnode_free_list) {
+    journal->j_cnode_free_list->prev = cn ;
+  }
+  cn->prev = NULL ; /* not needed with the memset, but I might kill the memset, and forget to do this */
+  journal->j_cnode_free_list = cn ;
+}
+
+static void clear_prepared_bits(struct buffer_head *bh) {
+  clear_buffer_journal_prepared (bh);
+  clear_buffer_journal_restore_dirty (bh);
+}
+
+/* utility function to force a BUG if it is called without the big
+** kernel lock held.  caller is the string printed just before calling BUG()
+*/
+void reiserfs_check_lock_depth(struct super_block *sb, char *caller) {
+#ifdef CONFIG_SMP
+  if (current->lock_depth < 0) {
+    reiserfs_panic (sb, "%s called without kernel lock held", caller) ;
+  }
+#else
+  ;
+#endif
+}
+
+/* return a cnode with same dev, block number and size in table, or null if not found */
+static inline struct reiserfs_journal_cnode *
+get_journal_hash_dev(struct super_block *sb,
+                     struct reiserfs_journal_cnode **table,
+                     long bl)
+{
+  struct reiserfs_journal_cnode *cn ;
+  cn = journal_hash(table, sb, bl) ;
+  while(cn) {
+    if (cn->blocknr == bl && cn->sb == sb)
+      return cn ;
+    cn = cn->hnext ;
+  }
+  return (struct reiserfs_journal_cnode *)0 ;
+}
+
+/*
+** this actually means 'can this block be reallocated yet?'.  If you set search_all, a block can only be allocated
+** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
+** being overwritten by a replay after crashing.
+**
+** If you don't set search_all, a block can only be allocated if it is not in the current transaction.  Since deleting
+** a block removes it from the current transaction, this case should never happen.  If you don't set search_all, make
+** sure you never write the block without logging it.
+**
+** next_zero_bit is a suggestion about the next block to try for find_forward.
+** when bl is rejected because it is set in a journal list bitmap, we search
+** for the next zero bit in the bitmap that rejected bl.  Then, we return that
+** through next_zero_bit for find_forward to try.
+**
+** Just because we return something in next_zero_bit does not mean we won't
+** reject it on the next call to reiserfs_in_journal
+**
+*/
+int reiserfs_in_journal(struct super_block *p_s_sb,
+                        int bmap_nr, int bit_nr, int search_all, 
+                        b_blocknr_t *next_zero_bit) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_cnode *cn ;
+  struct reiserfs_list_bitmap *jb ;
+  int i ;
+  unsigned long bl;
+
+  *next_zero_bit = 0 ; /* always start this at zero. */
+
+  PROC_INFO_INC( p_s_sb, journal.in_journal );
+  /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
+  ** if we crash before the transaction that freed it commits,  this transaction won't
+  ** have committed either, and the block will never be written
+  */
+  if (search_all) {
+    for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) {
+      PROC_INFO_INC( p_s_sb, journal.in_journal_bitmap );
+      jb = journal->j_list_bitmap + i ;
+      if (jb->journal_list && jb->bitmaps[bmap_nr] &&
+          test_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data)) {
+        *next_zero_bit = find_next_zero_bit((unsigned long *)
+                                     (jb->bitmaps[bmap_nr]->data),
+                                     p_s_sb->s_blocksize << 3, bit_nr+1) ; 
+        return 1 ;
+      }
+    }
+  }
+
+  bl = bmap_nr * (p_s_sb->s_blocksize << 3) + bit_nr;
+  /* is it in any old transactions? */
+  if (search_all && (cn = get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, bl))) {
+    return 1; 
+  }
+
+  /* is it in the current transaction.  This should never happen */
+  if ((cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, bl))) {
+    BUG();
+    return 1; 
+  }
+
+  PROC_INFO_INC( p_s_sb, journal.in_journal_reusable );
+  /* safe for reuse */
+  return 0 ;
+}
+
+/* insert cn into table
+*/
+static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, struct reiserfs_journal_cnode *cn) {
+  struct reiserfs_journal_cnode *cn_orig ;
+
+  cn_orig = journal_hash(table, cn->sb, cn->blocknr) ;
+  cn->hnext = cn_orig ;
+  cn->hprev = NULL ;
+  if (cn_orig) {
+    cn_orig->hprev = cn ;
+  }
+  journal_hash(table, cn->sb, cn->blocknr) =  cn ;
+}
+
+/* lock the current transaction */
+inline static void lock_journal(struct super_block *p_s_sb) {
+    PROC_INFO_INC( p_s_sb, journal.lock_journal );
+    down(&SB_JOURNAL(p_s_sb)->j_lock);
+}
+
+/* unlock the current transaction */
+inline static void unlock_journal(struct super_block *p_s_sb) {
+    up(&SB_JOURNAL(p_s_sb)->j_lock);
+}
+
+static inline void get_journal_list(struct reiserfs_journal_list *jl)
+{
+    jl->j_refcount++;
+}
+
+static inline void put_journal_list(struct super_block *s,
+                                   struct reiserfs_journal_list *jl)
+{
+    if (jl->j_refcount < 1) {
+        reiserfs_panic (s, "trans id %lu, refcount at %d", jl->j_trans_id,
+                                                 jl->j_refcount);
+    }
+    if (--jl->j_refcount == 0)
+        reiserfs_kfree(jl, sizeof(struct reiserfs_journal_list), s);
+}
+
+/*
+** this used to be much more involved, and I'm keeping it just in case things get ugly again.
+** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
+** transaction.
+*/
+static void cleanup_freed_for_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) {
+
+  struct reiserfs_list_bitmap *jb = jl->j_list_bitmap ;
+  if (jb) {
+    cleanup_bitmap_list(p_s_sb, jb) ;
+  }
+  jl->j_list_bitmap->journal_list = NULL ;
+  jl->j_list_bitmap = NULL ;
+}
+
+static int journal_list_still_alive(struct super_block *s,
+                                    unsigned long trans_id)
+{
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    struct list_head *entry = &journal->j_journal_list;
+    struct reiserfs_journal_list *jl;
+
+    if (!list_empty(entry)) {
+        jl = JOURNAL_LIST_ENTRY(entry->next);
+        if (jl->j_trans_id <= trans_id) {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) {
+    char b[BDEVNAME_SIZE];
+
+    if (buffer_journaled(bh)) {
+        reiserfs_warning(NULL, "clm-2084: pinned buffer %lu:%s sent to disk",
+                         bh->b_blocknr, bdevname(bh->b_bdev, b)) ;
+    }
+    if (uptodate)
+        set_buffer_uptodate(bh) ;
+    else
+        clear_buffer_uptodate(bh) ;
+    unlock_buffer(bh) ;
+    put_bh(bh) ;
+}
+
+static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) {
+    if (uptodate)
+        set_buffer_uptodate(bh) ;
+    else
+        clear_buffer_uptodate(bh) ;
+    unlock_buffer(bh) ;
+    put_bh(bh) ;
+}
+
+static void submit_logged_buffer(struct buffer_head *bh) {
+    get_bh(bh) ;
+    bh->b_end_io = reiserfs_end_buffer_io_sync ;
+    clear_buffer_journal_new (bh);
+    clear_buffer_dirty(bh) ;
+    if (!test_clear_buffer_journal_test (bh))
+        BUG();
+    if (!buffer_uptodate(bh))
+        BUG();
+    submit_bh(WRITE, bh) ;
+}
+
+static void submit_ordered_buffer(struct buffer_head *bh) {
+    get_bh(bh) ;
+    bh->b_end_io = reiserfs_end_ordered_io;
+    clear_buffer_dirty(bh) ;
+    if (!buffer_uptodate(bh))
+        BUG();
+    submit_bh(WRITE, bh) ;
+}
+
+static int submit_barrier_buffer(struct buffer_head *bh) {
+    get_bh(bh) ;
+    bh->b_end_io = reiserfs_end_ordered_io;
+    clear_buffer_dirty(bh) ;
+    if (!buffer_uptodate(bh))
+        BUG();
+    return submit_bh(WRITE_BARRIER, bh) ;
+}
+
+static void check_barrier_completion(struct super_block *s,
+                                     struct buffer_head *bh) {
+    if (buffer_eopnotsupp(bh)) {
+        clear_buffer_eopnotsupp(bh);
+        disable_barrier(s);
+        set_buffer_uptodate(bh);
+        set_buffer_dirty(bh);
+        sync_dirty_buffer(bh);
+    }
+}
+
+#define CHUNK_SIZE 32
+struct buffer_chunk {
+    struct buffer_head *bh[CHUNK_SIZE];
+    int nr;
+};
+
+static void write_chunk(struct buffer_chunk *chunk) {
+    int i;
+    for (i = 0; i < chunk->nr ; i++) {
+        submit_logged_buffer(chunk->bh[i]) ;
+    }
+    chunk->nr = 0;
+}
+
+static void write_ordered_chunk(struct buffer_chunk *chunk) {
+    int i;
+    for (i = 0; i < chunk->nr ; i++) {
+        submit_ordered_buffer(chunk->bh[i]) ;
+    }
+    chunk->nr = 0;
+}
+
+static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh,
+                         spinlock_t *lock,
+                         void (fn)(struct buffer_chunk *))
+{
+    int ret = 0;
+    if (chunk->nr >= CHUNK_SIZE)
+        BUG();
+    chunk->bh[chunk->nr++] = bh;
+    if (chunk->nr >= CHUNK_SIZE) {
+        ret = 1;
+        if (lock)
+            spin_unlock(lock);
+        fn(chunk);
+        if (lock)
+            spin_lock(lock);
+    }
+    return ret;
+}
+
+
+static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0);
+static struct reiserfs_jh *alloc_jh(void) {
+    struct reiserfs_jh *jh;
+    while(1) {
+        jh = kmalloc(sizeof(*jh), GFP_NOFS);
+        if (jh) {
+            atomic_inc(&nr_reiserfs_jh);
+            return jh;
+        }
+        yield();
+    }
+}
+
+/*
+ * we want to free the jh when the buffer has been written
+ * and waited on
+ */
+void reiserfs_free_jh(struct buffer_head *bh) {
+    struct reiserfs_jh *jh;
+
+    jh = bh->b_private;
+    if (jh) {
+        bh->b_private = NULL;
+        jh->bh = NULL;
+        list_del_init(&jh->list);
+        kfree(jh);
+        if (atomic_read(&nr_reiserfs_jh) <= 0)
+            BUG();
+        atomic_dec(&nr_reiserfs_jh);
+        put_bh(bh);
+    }
+}
+
+static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh,
+                           int tail)
+{
+    struct reiserfs_jh *jh;
+
+    if (bh->b_private) {
+        spin_lock(&j->j_dirty_buffers_lock);
+        if (!bh->b_private) {
+            spin_unlock(&j->j_dirty_buffers_lock);
+            goto no_jh;
+        }
+        jh = bh->b_private;
+        list_del_init(&jh->list);
+    } else {
+no_jh:
+        get_bh(bh);
+        jh = alloc_jh();
+        spin_lock(&j->j_dirty_buffers_lock);
+        /* buffer must be locked for __add_jh, should be able to have
+         * two adds at the same time
+         */
+        if (bh->b_private)
+            BUG();
+        jh->bh = bh;
+        bh->b_private = jh;
+    }
+    jh->jl = j->j_current_jl;
+    if (tail)
+        list_add_tail(&jh->list, &jh->jl->j_tail_bh_list);
+    else {
+        list_add_tail(&jh->list, &jh->jl->j_bh_list);
+    }
+    spin_unlock(&j->j_dirty_buffers_lock);
+    return 0;
+}
+
+int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) {
+    return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1);
+}
+int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) {
+    return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0);
+}
+
+#define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
+static int write_ordered_buffers(spinlock_t *lock,
+                                 struct reiserfs_journal *j,
+                                 struct reiserfs_journal_list *jl,
+                                 struct list_head *list)
+{
+    struct buffer_head *bh;
+    struct reiserfs_jh *jh;
+    int ret = j->j_errno;
+    struct buffer_chunk chunk;
+    struct list_head tmp;
+    INIT_LIST_HEAD(&tmp);
+
+    chunk.nr = 0;
+    spin_lock(lock);
+    while(!list_empty(list)) {
+        jh = JH_ENTRY(list->next);
+        bh = jh->bh;
+        get_bh(bh);
+        if (test_set_buffer_locked(bh)) {
+            if (!buffer_dirty(bh)) {
+                list_del_init(&jh->list);
+                list_add(&jh->list, &tmp);
+                goto loop_next;
+            }
+            spin_unlock(lock);
+            if (chunk.nr)
+                write_ordered_chunk(&chunk);
+            wait_on_buffer(bh);
+            cond_resched();
+            spin_lock(lock);
+            goto loop_next;
+        }
+        if (buffer_dirty(bh)) {
+            list_del_init(&jh->list);
+            list_add(&jh->list, &tmp);
+            add_to_chunk(&chunk, bh, lock, write_ordered_chunk);
+        } else {
+            reiserfs_free_jh(bh);
+            unlock_buffer(bh);
+        }
+loop_next:
+        put_bh(bh);
+        cond_resched_lock(lock);
+    }
+    if (chunk.nr) {
+        spin_unlock(lock);
+        write_ordered_chunk(&chunk);
+        spin_lock(lock);
+    }
+    while(!list_empty(&tmp)) {
+        jh = JH_ENTRY(tmp.prev);
+        bh = jh->bh;
+        get_bh(bh);
+        reiserfs_free_jh(bh);
+
+        if (buffer_locked(bh)) {
+            spin_unlock(lock);
+            wait_on_buffer(bh);
+            spin_lock(lock);
+        }
+        if (!buffer_uptodate(bh)) {
+            ret = -EIO;
+        }
+        put_bh(bh);
+        cond_resched_lock(lock);
+    }
+    spin_unlock(lock);
+    return ret;
+}
+
+static int flush_older_commits(struct super_block *s, struct reiserfs_journal_list *jl) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    struct reiserfs_journal_list *other_jl;
+    struct reiserfs_journal_list *first_jl;
+    struct list_head *entry;
+    unsigned long trans_id = jl->j_trans_id;
+    unsigned long other_trans_id;
+    unsigned long first_trans_id;
+
+find_first:
+    /*
+     * first we walk backwards to find the oldest uncommitted transation
+     */
+    first_jl = jl;
+    entry = jl->j_list.prev;
+    while(1) {
+        other_jl = JOURNAL_LIST_ENTRY(entry);
+        if (entry == &journal->j_journal_list ||
+            atomic_read(&other_jl->j_older_commits_done))
+            break;
+
+        first_jl = other_jl;
+        entry = other_jl->j_list.prev;
+    }
+
+    /* if we didn't find any older uncommitted transactions, return now */
+    if (first_jl == jl) {
+        return 0;
+    }
+
+    first_trans_id = first_jl->j_trans_id;
+
+    entry = &first_jl->j_list;
+    while(1) {
+        other_jl = JOURNAL_LIST_ENTRY(entry);
+        other_trans_id = other_jl->j_trans_id;
+
+        if (other_trans_id < trans_id) {
+            if (atomic_read(&other_jl->j_commit_left) != 0) {
+                flush_commit_list(s, other_jl, 0);
+
+                /* list we were called with is gone, return */
+                if (!journal_list_still_alive(s, trans_id))
+                    return 1;
+
+                /* the one we just flushed is gone, this means all
+                 * older lists are also gone, so first_jl is no longer
+                 * valid either.  Go back to the beginning.
+                 */
+                if (!journal_list_still_alive(s, other_trans_id)) {
+                    goto find_first;
+                }
+            }
+            entry = entry->next;
+            if (entry == &journal->j_journal_list)
+                return 0;
+        } else {
+            return 0;
+        }
+    }
+    return 0;
+}
+int reiserfs_async_progress_wait(struct super_block *s) {
+    DEFINE_WAIT(wait);
+    struct reiserfs_journal *j = SB_JOURNAL(s);
+    if (atomic_read(&j->j_async_throttle))
+        blk_congestion_wait(WRITE, HZ/10);
+    return 0;
+}
+
+/*
+** if this journal list still has commit blocks unflushed, send them to disk.
+**
+** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
+** Before the commit block can by written, every other log block must be safely on disk
+**
+*/
+static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) {
+  int i;
+  int bn ;
+  struct buffer_head *tbh = NULL ;
+  unsigned long trans_id = jl->j_trans_id;
+  struct reiserfs_journal *journal = SB_JOURNAL (s);
+  int barrier = 0;
+  int retval = 0;
+
+  reiserfs_check_lock_depth(s, "flush_commit_list") ;
+
+  if (atomic_read(&jl->j_older_commits_done)) {
+    return 0 ;
+  }
+
+  /* before we can put our commit blocks on disk, we have to make sure everyone older than
+  ** us is on disk too
+  */
+  BUG_ON (jl->j_len <= 0);
+  BUG_ON (trans_id == journal->j_trans_id);
+
+  get_journal_list(jl);
+  if (flushall) {
+    if (flush_older_commits(s, jl) == 1) {
+      /* list disappeared during flush_older_commits.  return */
+      goto put_jl;
+    }
+  }
+
+  /* make sure nobody is trying to flush this one at the same time */
+  down(&jl->j_commit_lock);
+  if (!journal_list_still_alive(s, trans_id)) {
+    up(&jl->j_commit_lock);
+    goto put_jl;
+  }
+  BUG_ON (jl->j_trans_id == 0);
+
+  /* this commit is done, exit */
+  if (atomic_read(&(jl->j_commit_left)) <= 0) {
+    if (flushall) {
+      atomic_set(&(jl->j_older_commits_done), 1) ;
+    }
+    up(&jl->j_commit_lock);
+    goto put_jl;
+  }
+
+  if (!list_empty(&jl->j_bh_list)) {
+      unlock_kernel();
+      write_ordered_buffers(&journal->j_dirty_buffers_lock,
+                            journal, jl, &jl->j_bh_list);
+      lock_kernel();
+  }
+  BUG_ON (!list_empty(&jl->j_bh_list));
+  /*
+   * for the description block and all the log blocks, submit any buffers
+   * that haven't already reached the disk
+   */
+  atomic_inc(&journal->j_async_throttle);
+  for (i = 0 ; i < (jl->j_len + 1) ; i++) {
+    bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start+i) %
+         SB_ONDISK_JOURNAL_SIZE(s);
+    tbh = journal_find_get_block(s, bn) ;
+    if (buffer_dirty(tbh)) /* redundant, ll_rw_block() checks */
+        ll_rw_block(WRITE, 1, &tbh) ;
+    put_bh(tbh) ;
+  }
+  atomic_dec(&journal->j_async_throttle);
+
+  /* wait on everything written so far before writing the commit
+   * if we are in barrier mode, send the commit down now
+   */
+  barrier = reiserfs_barrier_flush(s);
+  if (barrier) {
+      int ret;
+      lock_buffer(jl->j_commit_bh);
+      ret = submit_barrier_buffer(jl->j_commit_bh);
+      if (ret == -EOPNOTSUPP) {
+          set_buffer_uptodate(jl->j_commit_bh);
+          disable_barrier(s);
+          barrier = 0;
+      }
+  }
+  for (i = 0 ;  i < (jl->j_len + 1) ; i++) {
+    bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) +
+         (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s) ;
+    tbh = journal_find_get_block(s, bn) ;
+    wait_on_buffer(tbh) ;
+    // since we're using ll_rw_blk above, it might have skipped over
+    // a locked buffer.  Double check here
+    //
+    if (buffer_dirty(tbh)) /* redundant, sync_dirty_buffer() checks */
+      sync_dirty_buffer(tbh);
+    if (unlikely (!buffer_uptodate(tbh))) {
+#ifdef CONFIG_REISERFS_CHECK
+      reiserfs_warning(s, "journal-601, buffer write failed") ;
+#endif
+      retval = -EIO;
+    }
+    put_bh(tbh) ; /* once for journal_find_get_block */
+    put_bh(tbh) ;    /* once due to original getblk in do_journal_end */
+    atomic_dec(&(jl->j_commit_left)) ;
+  }
+
+  BUG_ON (atomic_read(&(jl->j_commit_left)) != 1);
+
+  if (!barrier) {
+      if (buffer_dirty(jl->j_commit_bh))
+        BUG();
+      mark_buffer_dirty(jl->j_commit_bh) ;
+      sync_dirty_buffer(jl->j_commit_bh) ;
+  } else
+      wait_on_buffer(jl->j_commit_bh);
+
+  check_barrier_completion(s, jl->j_commit_bh);
+
+  /* If there was a write error in the journal - we can't commit this
+   * transaction - it will be invalid and, if successful, will just end
+   * up propogating the write error out to the filesystem. */
+  if (unlikely (!buffer_uptodate(jl->j_commit_bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+    reiserfs_warning(s, "journal-615: buffer write failed") ;
+#endif
+    retval = -EIO;
+  }
+  bforget(jl->j_commit_bh) ;
+  if (journal->j_last_commit_id != 0 &&
+     (jl->j_trans_id - journal->j_last_commit_id) != 1) {
+      reiserfs_warning(s, "clm-2200: last commit %lu, current %lu",
+                       journal->j_last_commit_id,
+                       jl->j_trans_id);
+  }
+  journal->j_last_commit_id = jl->j_trans_id;
+
+  /* now, every commit block is on the disk.  It is safe to allow blocks freed during this transaction to be reallocated */
+  cleanup_freed_for_journal_list(s, jl) ;
+
+  retval = retval ? retval : journal->j_errno;
+
+  /* mark the metadata dirty */
+  if (!retval)
+    dirty_one_transaction(s, jl);
+  atomic_dec(&(jl->j_commit_left)) ;
+
+  if (flushall) {
+    atomic_set(&(jl->j_older_commits_done), 1) ;
+  }
+  up(&jl->j_commit_lock);
+put_jl:
+  put_journal_list(s, jl);
+
+  if (retval)
+    reiserfs_abort (s, retval, "Journal write error in %s", __FUNCTION__);
+  return retval;
+}
+
+/*
+** flush_journal_list frequently needs to find a newer transaction for a given block.  This does that, or 
+** returns NULL if it can't find anything 
+*/
+static struct reiserfs_journal_list *find_newer_jl_for_cn(struct reiserfs_journal_cnode *cn) {
+  struct super_block *sb = cn->sb;
+  b_blocknr_t blocknr = cn->blocknr ;
+
+  cn = cn->hprev ;
+  while(cn) {
+    if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) {
+      return cn->jlist ;
+    }
+    cn = cn->hprev ;
+  }
+  return NULL ;
+}
+
+static void remove_journal_hash(struct super_block *, struct reiserfs_journal_cnode **,
+struct reiserfs_journal_list *, unsigned long, int);
+
+/*
+** once all the real blocks have been flushed, it is safe to remove them from the
+** journal list for this transaction.  Aside from freeing the cnode, this also allows the
+** block to be reallocated for data blocks if it had been deleted.
+*/
+static void remove_all_from_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl, int debug) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_cnode *cn, *last ;
+  cn = jl->j_realblock ;
+
+  /* which is better, to lock once around the whole loop, or
+  ** to lock for each call to remove_journal_hash?
+  */
+  while(cn) {
+    if (cn->blocknr != 0) {
+      if (debug) {
+       reiserfs_warning (p_s_sb, "block %u, bh is %d, state %ld", cn->blocknr,
+                         cn->bh ? 1: 0, cn->state) ;
+      }
+      cn->state = 0 ;
+      remove_journal_hash(p_s_sb, journal->j_list_hash_table, jl, cn->blocknr, 1) ;
+    }
+    last = cn ;
+    cn = cn->next ;
+    free_cnode(p_s_sb, last) ;
+  }
+  jl->j_realblock = NULL ;
+}
+
+/*
+** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
+** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
+** releasing blocks in this transaction for reuse as data blocks.
+** called by flush_journal_list, before it calls remove_all_from_journal_list
+**
+*/
+static int _update_journal_header_block(struct super_block *p_s_sb, unsigned long offset, unsigned long trans_id) {
+  struct reiserfs_journal_header *jh ;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+  if (reiserfs_is_journal_aborted (journal))
+    return -EIO;
+
+  if (trans_id >= journal->j_last_flush_trans_id) {
+    if (buffer_locked((journal->j_header_bh)))  {
+      wait_on_buffer((journal->j_header_bh)) ;
+      if (unlikely (!buffer_uptodate(journal->j_header_bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+        reiserfs_warning (p_s_sb, "journal-699: buffer write failed") ;
+#endif
+        return -EIO;
+      }
+    }
+    journal->j_last_flush_trans_id = trans_id ;
+    journal->j_first_unflushed_offset = offset ;
+    jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ;
+    jh->j_last_flush_trans_id = cpu_to_le32(trans_id) ;
+    jh->j_first_unflushed_offset = cpu_to_le32(offset) ;
+    jh->j_mount_id = cpu_to_le32(journal->j_mount_id) ;
+
+    if (reiserfs_barrier_flush(p_s_sb)) {
+        int ret;
+        lock_buffer(journal->j_header_bh);
+        ret = submit_barrier_buffer(journal->j_header_bh);
+        if (ret == -EOPNOTSUPP) {
+            set_buffer_uptodate(journal->j_header_bh);
+            disable_barrier(p_s_sb);
+            goto sync;
+        }
+        wait_on_buffer(journal->j_header_bh);
+        check_barrier_completion(p_s_sb, journal->j_header_bh);
+    } else {
+sync:
+        set_buffer_dirty(journal->j_header_bh) ;
+        sync_dirty_buffer(journal->j_header_bh) ;
+    }
+    if (!buffer_uptodate(journal->j_header_bh)) {
+      reiserfs_warning (p_s_sb, "journal-837: IO error during journal replay");
+      return -EIO ;
+    }
+  }
+  return 0 ;
+}
+
+static int update_journal_header_block(struct super_block *p_s_sb, 
+                                       unsigned long offset, 
+                                       unsigned long trans_id) {
+    return _update_journal_header_block(p_s_sb, offset, trans_id);
+}
+/* 
+** flush any and all journal lists older than you are 
+** can only be called from flush_journal_list
+*/
+static int flush_older_journal_lists(struct super_block *p_s_sb,
+                                     struct reiserfs_journal_list *jl)
+{
+    struct list_head *entry;
+    struct reiserfs_journal_list *other_jl ;
+    struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+    unsigned long trans_id = jl->j_trans_id;
+
+    /* we know we are the only ones flushing things, no extra race
+     * protection is required.
+     */
+restart:
+    entry = journal->j_journal_list.next;
+    /* Did we wrap? */
+    if (entry == &journal->j_journal_list)
+        return 0;
+    other_jl = JOURNAL_LIST_ENTRY(entry);
+    if (other_jl->j_trans_id < trans_id) {
+        BUG_ON (other_jl->j_refcount <= 0);
+        /* do not flush all */
+        flush_journal_list(p_s_sb, other_jl, 0) ;
+
+        /* other_jl is now deleted from the list */
+        goto restart;
+    }
+    return 0 ;
+}
+
+static void del_from_work_list(struct super_block *s,
+                               struct reiserfs_journal_list *jl) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    if (!list_empty(&jl->j_working_list)) {
+        list_del_init(&jl->j_working_list);
+        journal->j_num_work_lists--;
+    }
+}
+
+/* flush a journal list, both commit and real blocks
+**
+** always set flushall to 1, unless you are calling from inside
+** flush_journal_list
+**
+** IMPORTANT.  This can only be called while there are no journal writers, 
+** and the journal is locked.  That means it can only be called from 
+** do_journal_end, or by journal_release
+*/
+static int flush_journal_list(struct super_block *s, 
+                              struct reiserfs_journal_list *jl, int flushall) {
+  struct reiserfs_journal_list *pjl ;
+  struct reiserfs_journal_cnode *cn, *last ;
+  int count ;
+  int was_jwait = 0 ;
+  int was_dirty = 0 ;
+  struct buffer_head *saved_bh ; 
+  unsigned long j_len_saved = jl->j_len ;
+  struct reiserfs_journal *journal = SB_JOURNAL (s);
+  int err = 0;
+
+  BUG_ON (j_len_saved <= 0);
+
+  if (atomic_read(&journal->j_wcount) != 0) {
+    reiserfs_warning(s, "clm-2048: flush_journal_list called with wcount %d",
+                      atomic_read(&journal->j_wcount)) ;
+  }
+  BUG_ON (jl->j_trans_id == 0);
+
+  /* if flushall == 0, the lock is already held */
+  if (flushall) {
+      down(&journal->j_flush_sem);
+  } else if (!down_trylock(&journal->j_flush_sem)) {
+      BUG();
+  }
+
+  count = 0 ;
+  if (j_len_saved > journal->j_trans_max) {
+    reiserfs_panic(s, "journal-715: flush_journal_list, length is %lu, trans id %lu\n", j_len_saved, jl->j_trans_id);
+    return 0 ;
+  }
+
+  /* if all the work is already done, get out of here */
+  if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 
+      atomic_read(&(jl->j_commit_left)) <= 0) {
+    goto flush_older_and_return ;
+  } 
+
+  /* start by putting the commit list on disk.  This will also flush 
+  ** the commit lists of any olders transactions
+  */
+  flush_commit_list(s, jl, 1) ;
+
+  if (!(jl->j_state & LIST_DIRTY) && !reiserfs_is_journal_aborted (journal))
+      BUG();
+
+  /* are we done now? */
+  if (atomic_read(&(jl->j_nonzerolen)) <= 0 && 
+      atomic_read(&(jl->j_commit_left)) <= 0) {
+    goto flush_older_and_return ;
+  }
+
+  /* loop through each cnode, see if we need to write it, 
+  ** or wait on a more recent transaction, or just ignore it 
+  */
+  if (atomic_read(&(journal->j_wcount)) != 0) {
+    reiserfs_panic(s, "journal-844: panic journal list is flushing, wcount is not 0\n") ;
+  }
+  cn = jl->j_realblock ;
+  while(cn) {
+    was_jwait = 0 ;
+    was_dirty = 0 ;
+    saved_bh = NULL ;
+    /* blocknr of 0 is no longer in the hash, ignore it */
+    if (cn->blocknr == 0) {
+      goto free_cnode ;
+    }
+
+    /* This transaction failed commit. Don't write out to the disk */
+    if (!(jl->j_state & LIST_DIRTY))
+        goto free_cnode;
+
+    pjl = find_newer_jl_for_cn(cn) ;
+    /* the order is important here.  We check pjl to make sure we
+    ** don't clear BH_JDirty_wait if we aren't the one writing this
+    ** block to disk
+    */
+    if (!pjl && cn->bh) {
+      saved_bh = cn->bh ;
+
+      /* we do this to make sure nobody releases the buffer while 
+      ** we are working with it 
+      */
+      get_bh(saved_bh) ;
+
+      if (buffer_journal_dirty(saved_bh)) {
+        BUG_ON (!can_dirty (cn));
+        was_jwait = 1 ;
+        was_dirty = 1 ;
+      } else if (can_dirty(cn)) {
+        /* everything with !pjl && jwait should be writable */
+        BUG();
+      }
+    }
+
+    /* if someone has this block in a newer transaction, just make
+    ** sure they are commited, and don't try writing it to disk
+    */
+    if (pjl) {
+      if (atomic_read(&pjl->j_commit_left))
+        flush_commit_list(s, pjl, 1) ;
+      goto free_cnode ;
+    }
+
+    /* bh == NULL when the block got to disk on its own, OR, 
+    ** the block got freed in a future transaction 
+    */
+    if (saved_bh == NULL) {
+      goto free_cnode ;
+    }
+
+    /* this should never happen.  kupdate_one_transaction has this list
+    ** locked while it works, so we should never see a buffer here that
+    ** is not marked JDirty_wait
+    */
+    if ((!was_jwait) && !buffer_locked(saved_bh)) {
+        reiserfs_warning (s, "journal-813: BAD! buffer %llu %cdirty %cjwait, "
+                          "not in a newer tranasction",
+                          (unsigned long long)saved_bh->b_blocknr,
+                          was_dirty ? ' ' : '!', was_jwait ? ' ' : '!') ;
+    }
+    if (was_dirty) { 
+      /* we inc again because saved_bh gets decremented at free_cnode */
+      get_bh(saved_bh) ;
+      set_bit(BLOCK_NEEDS_FLUSH, &cn->state) ;
+      lock_buffer(saved_bh);
+      BUG_ON (cn->blocknr != saved_bh->b_blocknr);
+      if (buffer_dirty(saved_bh))
+        submit_logged_buffer(saved_bh) ;
+      else
+        unlock_buffer(saved_bh);
+      count++ ;
+    } else {
+      reiserfs_warning (s, "clm-2082: Unable to flush buffer %llu in %s",
+                        (unsigned long long)saved_bh->b_blocknr, __FUNCTION__);
+    }
+free_cnode:
+    last = cn ;
+    cn = cn->next ;
+    if (saved_bh) {
+      /* we incremented this to keep others from taking the buffer head away */
+      put_bh(saved_bh) ;
+      if (atomic_read(&(saved_bh->b_count)) < 0) {
+        reiserfs_warning (s, "journal-945: saved_bh->b_count < 0");
+      }
+    }
+  }
+  if (count > 0) {
+    cn = jl->j_realblock ;
+    while(cn) {
+      if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) {
+        if (!cn->bh) {
+          reiserfs_panic(s, "journal-1011: cn->bh is NULL\n") ;
+        }
+        wait_on_buffer(cn->bh) ;
+        if (!cn->bh) {
+          reiserfs_panic(s, "journal-1012: cn->bh is NULL\n") ;
+        }
+        if (unlikely (!buffer_uptodate(cn->bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+          reiserfs_warning(s, "journal-949: buffer write failed\n") ;
+#endif
+          err = -EIO;
+        }
+        /* note, we must clear the JDirty_wait bit after the up to date
+        ** check, otherwise we race against our flushpage routine
+        */
+        BUG_ON (!test_clear_buffer_journal_dirty (cn->bh));
+
+        /* undo the inc from journal_mark_dirty */
+        put_bh(cn->bh) ;
+        brelse(cn->bh) ;
+      }
+      cn = cn->next ;
+    }
+  }
+
+  if (err)
+    reiserfs_abort (s, -EIO, "Write error while pushing transaction to disk in %s", __FUNCTION__);
+flush_older_and_return:
+
+
+  /* before we can update the journal header block, we _must_ flush all 
+  ** real blocks from all older transactions to disk.  This is because
+  ** once the header block is updated, this transaction will not be
+  ** replayed after a crash
+  */
+  if (flushall) {
+    flush_older_journal_lists(s, jl);
+  } 
+  
+  err = journal->j_errno;
+  /* before we can remove everything from the hash tables for this 
+  ** transaction, we must make sure it can never be replayed
+  **
+  ** since we are only called from do_journal_end, we know for sure there
+  ** are no allocations going on while we are flushing journal lists.  So,
+  ** we only need to update the journal header block for the last list
+  ** being flushed
+  */
+  if (!err && flushall) {
+    err = update_journal_header_block(s, (jl->j_start + jl->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(s), jl->j_trans_id) ;
+    if (err)
+        reiserfs_abort (s, -EIO, "Write error while updating journal header in %s", __FUNCTION__);
+  }
+  remove_all_from_journal_list(s, jl, 0) ;
+  list_del_init(&jl->j_list);
+  journal->j_num_lists--;
+  del_from_work_list(s, jl);
+
+  if (journal->j_last_flush_id != 0 &&
+     (jl->j_trans_id - journal->j_last_flush_id) != 1) {
+      reiserfs_warning(s, "clm-2201: last flush %lu, current %lu",
+                       journal->j_last_flush_id,
+                       jl->j_trans_id);
+  }
+  journal->j_last_flush_id = jl->j_trans_id;
+
+  /* not strictly required since we are freeing the list, but it should
+   * help find code using dead lists later on
+   */
+  jl->j_len = 0 ;
+  atomic_set(&(jl->j_nonzerolen), 0) ;
+  jl->j_start = 0 ;
+  jl->j_realblock = NULL ;
+  jl->j_commit_bh = NULL ;
+  jl->j_trans_id = 0 ;
+  jl->j_state = 0;
+  put_journal_list(s, jl);
+  if (flushall)
+    up(&journal->j_flush_sem);
+  return err ;
+} 
+
+static int write_one_transaction(struct super_block *s,
+                                 struct reiserfs_journal_list *jl,
+                                 struct buffer_chunk *chunk)
+{
+    struct reiserfs_journal_cnode *cn;
+    int ret = 0 ;
+
+    jl->j_state |= LIST_TOUCHED;
+    del_from_work_list(s, jl);
+    if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) {
+        return 0;
+    }
+
+    cn = jl->j_realblock ;
+    while(cn) {
+        /* if the blocknr == 0, this has been cleared from the hash,
+        ** skip it
+        */
+        if (cn->blocknr == 0) {
+            goto next ;
+        }
+        if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
+            struct buffer_head *tmp_bh;
+            /* we can race against journal_mark_freed when we try
+             * to lock_buffer(cn->bh), so we have to inc the buffer
+             * count, and recheck things after locking
+             */
+            tmp_bh = cn->bh;
+            get_bh(tmp_bh);
+            lock_buffer(tmp_bh);
+            if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) {
+                if (!buffer_journal_dirty(tmp_bh) ||
+                    buffer_journal_prepared(tmp_bh))
+                    BUG();
+                add_to_chunk(chunk, tmp_bh, NULL, write_chunk);
+                ret++;
+            } else {
+                /* note, cn->bh might be null now */
+                unlock_buffer(tmp_bh);
+            }
+            put_bh(tmp_bh);
+        }
+next:
+        cn = cn->next ;
+        cond_resched();
+    }
+    return ret ;
+}
+
+/* used by flush_commit_list */
+static int dirty_one_transaction(struct super_block *s,
+                                 struct reiserfs_journal_list *jl)
+{
+    struct reiserfs_journal_cnode *cn;
+    struct reiserfs_journal_list *pjl;
+    int ret = 0 ;
+
+    jl->j_state |= LIST_DIRTY;
+    cn = jl->j_realblock ;
+    while(cn) {
+        /* look for a more recent transaction that logged this
+        ** buffer.  Only the most recent transaction with a buffer in
+        ** it is allowed to send that buffer to disk
+        */
+        pjl = find_newer_jl_for_cn(cn) ;
+        if (!pjl && cn->blocknr && cn->bh && buffer_journal_dirty(cn->bh))
+        {
+            BUG_ON (!can_dirty(cn));
+            /* if the buffer is prepared, it will either be logged
+             * or restored.  If restored, we need to make sure
+             * it actually gets marked dirty
+             */
+            clear_buffer_journal_new (cn->bh);
+            if (buffer_journal_prepared (cn->bh)) {
+                set_buffer_journal_restore_dirty (cn->bh);
+            } else {
+                set_buffer_journal_test (cn->bh);
+                mark_buffer_dirty(cn->bh);
+            }
+        } 
+        cn = cn->next ;
+    }
+    return ret ;
+}
+
+static int kupdate_transactions(struct super_block *s,
+                                   struct reiserfs_journal_list *jl,
+                                   struct reiserfs_journal_list **next_jl,
+                                   unsigned long *next_trans_id,
+                                   int num_blocks,
+                                   int num_trans) {
+    int ret = 0;
+    int written = 0 ;
+    int transactions_flushed = 0;
+    unsigned long orig_trans_id = jl->j_trans_id;
+    struct buffer_chunk chunk;
+    struct list_head *entry;
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    chunk.nr = 0;
+
+    down(&journal->j_flush_sem);
+    if (!journal_list_still_alive(s, orig_trans_id)) {
+        goto done;
+    }
+
+    /* we've got j_flush_sem held, nobody is going to delete any
+     * of these lists out from underneath us
+     */
+    while((num_trans && transactions_flushed < num_trans) ||
+          (!num_trans && written < num_blocks)) {
+
+        if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) ||
+            atomic_read(&jl->j_commit_left) || !(jl->j_state & LIST_DIRTY))
+        {
+            del_from_work_list(s, jl);
+            break;
+        }
+        ret = write_one_transaction(s, jl, &chunk);
+
+        if (ret < 0)
+            goto done;
+        transactions_flushed++;
+        written += ret;
+        entry = jl->j_list.next;
+
+        /* did we wrap? */
+        if (entry == &journal->j_journal_list) {
+            break;
+        }
+        jl = JOURNAL_LIST_ENTRY(entry);
+
+        /* don't bother with older transactions */
+        if (jl->j_trans_id <= orig_trans_id)
+            break;
+    }
+    if (chunk.nr) {
+        write_chunk(&chunk);
+    }
+
+done:
+    up(&journal->j_flush_sem);
+    return ret;
+}
+
+/* for o_sync and fsync heavy applications, they tend to use
+** all the journa list slots with tiny transactions.  These
+** trigger lots and lots of calls to update the header block, which
+** adds seeks and slows things down.
+**
+** This function tries to clear out a large chunk of the journal lists
+** at once, which makes everything faster since only the newest journal
+** list updates the header block
+*/
+static int flush_used_journal_lists(struct super_block *s,
+                                    struct reiserfs_journal_list *jl) {
+    unsigned long len = 0;
+    unsigned long cur_len;
+    int ret;
+    int i;
+    int limit = 256;
+    struct reiserfs_journal_list *tjl;
+    struct reiserfs_journal_list *flush_jl;
+    unsigned long trans_id;
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+
+    flush_jl = tjl = jl;
+
+    /* in data logging mode, try harder to flush a lot of blocks */
+    if (reiserfs_data_log(s))
+        limit = 1024;
+    /* flush for 256 transactions or limit blocks, whichever comes first */
+    for(i = 0 ; i < 256 && len < limit ; i++) {
+        if (atomic_read(&tjl->j_commit_left) ||
+            tjl->j_trans_id < jl->j_trans_id) {
+            break;
+        }
+        cur_len = atomic_read(&tjl->j_nonzerolen);
+        if (cur_len > 0) {
+            tjl->j_state &= ~LIST_TOUCHED;
+        }
+        len += cur_len;
+        flush_jl = tjl;
+        if (tjl->j_list.next == &journal->j_journal_list)
+            break;
+        tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next);
+    }
+    /* try to find a group of blocks we can flush across all the
+    ** transactions, but only bother if we've actually spanned
+    ** across multiple lists
+    */
+    if (flush_jl != jl) {
+        ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
+    }
+    flush_journal_list(s, flush_jl, 1);
+    return 0;
+}
+
+/*
+** removes any nodes in table with name block and dev as bh.
+** only touchs the hnext and hprev pointers.
+*/
+void remove_journal_hash(struct super_block *sb,
+                        struct reiserfs_journal_cnode **table,
+                        struct reiserfs_journal_list *jl,
+                        unsigned long block, int remove_freed)
+{
+  struct reiserfs_journal_cnode *cur ;
+  struct reiserfs_journal_cnode **head ;
+
+  head= &(journal_hash(table, sb, block)) ;
+  if (!head) {
+    return ;
+  }
+  cur = *head ;
+  while(cur) {
+    if (cur->blocknr == block && cur->sb == sb && (jl == NULL || jl == cur->jlist) && 
+        (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) {
+      if (cur->hnext) {
+        cur->hnext->hprev = cur->hprev ;
+      }
+      if (cur->hprev) {
+        cur->hprev->hnext = cur->hnext ;
+      } else {
+        *head = cur->hnext ;
+      }
+      cur->blocknr = 0 ;
+      cur->sb = NULL ;
+      cur->state = 0 ;
+      if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */
+        atomic_dec(&(cur->jlist->j_nonzerolen)) ;
+      cur->bh = NULL ;
+      cur->jlist = NULL ;
+    } 
+    cur = cur->hnext ;
+  }
+}
+
+static void free_journal_ram(struct super_block *p_s_sb) {
+  struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+  reiserfs_kfree(journal->j_current_jl,
+                 sizeof(struct reiserfs_journal_list), p_s_sb);
+  journal->j_num_lists--;
+
+  vfree(journal->j_cnode_free_orig) ;
+  free_list_bitmaps(p_s_sb, journal->j_list_bitmap) ;
+  free_bitmap_nodes(p_s_sb) ; /* must be after free_list_bitmaps */
+  if (journal->j_header_bh) {
+    brelse(journal->j_header_bh) ;
+  }
+  /* j_header_bh is on the journal dev, make sure not to release the journal
+   * dev until we brelse j_header_bh
+   */
+  release_journal_dev(p_s_sb, journal);
+  vfree(journal) ;
+}
+
+/*
+** call on unmount.  Only set error to 1 if you haven't made your way out
+** of read_super() yet.  Any other caller must keep error at 0.
+*/
+static int do_journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, int error) {
+  struct reiserfs_transaction_handle myth ;
+  int flushed = 0;
+  struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+  /* we only want to flush out transactions if we were called with error == 0
+  */
+  if (!error && !(p_s_sb->s_flags & MS_RDONLY)) {
+    /* end the current trans */
+    BUG_ON (!th->t_trans_id);
+    do_journal_end(th, p_s_sb,10, FLUSH_ALL) ;
+
+    /* make sure something gets logged to force our way into the flush code */
+    if (!journal_join(&myth, p_s_sb, 1)) {
+        reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ;
+        journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ;
+        do_journal_end(&myth, p_s_sb,1, FLUSH_ALL) ;
+        flushed = 1;
+    }
+  }
+
+  /* this also catches errors during the do_journal_end above */
+  if (!error && reiserfs_is_journal_aborted(journal)) {
+      memset(&myth, 0, sizeof(myth));
+      if (!journal_join_abort(&myth, p_s_sb, 1)) {
+          reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ;
+          journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ;
+          do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL) ;
+      }
+  }
+
+  reiserfs_mounted_fs_count-- ;
+  /* wait for all commits to finish */
+  cancel_delayed_work(&SB_JOURNAL(p_s_sb)->j_work);
+  flush_workqueue(commit_wq);
+  if (!reiserfs_mounted_fs_count) {
+    destroy_workqueue(commit_wq);
+    commit_wq = NULL;
+  }
+
+  free_journal_ram(p_s_sb) ;
+
+  return 0 ;
+}
+
+/*
+** call on unmount.  flush all journal trans, release all alloc'd ram
+*/
+int journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) {
+  return do_journal_release(th, p_s_sb, 0) ;
+}
+/*
+** only call from an error condition inside reiserfs_read_super!
+*/
+int journal_release_error(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) {
+  return do_journal_release(th, p_s_sb, 1) ;
+}
+
+/* compares description block with commit block.  returns 1 if they differ, 0 if they are the same */
+static int journal_compare_desc_commit(struct super_block *p_s_sb, struct reiserfs_journal_desc *desc, 
+                                       struct reiserfs_journal_commit *commit) {
+  if (get_commit_trans_id (commit) != get_desc_trans_id (desc) || 
+      get_commit_trans_len (commit) != get_desc_trans_len (desc) || 
+      get_commit_trans_len (commit) > SB_JOURNAL(p_s_sb)->j_trans_max ||
+      get_commit_trans_len (commit) <= 0 
+  ) {
+    return 1 ;
+  }
+  return 0 ;
+}
+/* returns 0 if it did not find a description block  
+** returns -1 if it found a corrupt commit block
+** returns 1 if both desc and commit were valid 
+*/
+static int journal_transaction_is_valid(struct super_block *p_s_sb, struct buffer_head *d_bh, unsigned long *oldest_invalid_trans_id, unsigned long *newest_mount_id) {
+  struct reiserfs_journal_desc *desc ;
+  struct reiserfs_journal_commit *commit ;
+  struct buffer_head *c_bh ;
+  unsigned long offset ;
+
+  if (!d_bh)
+      return 0 ;
+
+  desc = (struct reiserfs_journal_desc *)d_bh->b_data ;
+  if (get_desc_trans_len(desc) > 0 && !memcmp(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8)) {
+    if (oldest_invalid_trans_id && *oldest_invalid_trans_id && get_desc_trans_id(desc) > *oldest_invalid_trans_id) {
+      reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-986: transaction "
+                      "is valid returning because trans_id %d is greater than "
+                      "oldest_invalid %lu", get_desc_trans_id(desc),
+                       *oldest_invalid_trans_id);
+      return 0 ;
+    }
+    if (newest_mount_id && *newest_mount_id > get_desc_mount_id (desc)) {
+      reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1087: transaction "
+                     "is valid returning because mount_id %d is less than "
+                     "newest_mount_id %lu", get_desc_mount_id (desc),
+                     *newest_mount_id) ;
+      return -1 ;
+    }
+    if ( get_desc_trans_len(desc) > SB_JOURNAL(p_s_sb)->j_trans_max ) {
+      reiserfs_warning(p_s_sb, "journal-2018: Bad transaction length %d encountered, ignoring transaction", get_desc_trans_len(desc));
+      return -1 ;
+    }
+    offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ;
+
+    /* ok, we have a journal description block, lets see if the transaction was valid */
+    c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+                 ((offset + get_desc_trans_len(desc) + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ;
+    if (!c_bh)
+      return 0 ;
+    commit = (struct reiserfs_journal_commit *)c_bh->b_data ;
+    if (journal_compare_desc_commit(p_s_sb, desc, commit)) {
+      reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, 
+                     "journal_transaction_is_valid, commit offset %ld had bad "
+                     "time %d or length %d",
+                     c_bh->b_blocknr -  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+                     get_commit_trans_id (commit), 
+                     get_commit_trans_len(commit));
+      brelse(c_bh) ;
+      if (oldest_invalid_trans_id) {
+        *oldest_invalid_trans_id = get_desc_trans_id(desc) ;
+        reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1004: "
+                       "transaction_is_valid setting oldest invalid trans_id "
+                       "to %d", get_desc_trans_id(desc)) ;
+      }
+      return -1; 
+    }
+    brelse(c_bh) ;
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1006: found valid "
+                   "transaction start offset %llu, len %d id %d",
+                   d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                   get_desc_trans_len(desc), get_desc_trans_id(desc)) ;
+    return 1 ;
+  } else {
+    return 0 ;
+  }
+}
+
+static void brelse_array(struct buffer_head **heads, int num) {
+  int i ;
+  for (i = 0 ; i < num ; i++) {
+    brelse(heads[i]) ;
+  }
+}
+
+/*
+** given the start, and values for the oldest acceptable transactions,
+** this either reads in a replays a transaction, or returns because the transaction
+** is invalid, or too old.
+*/
+static int journal_read_transaction(struct super_block *p_s_sb, unsigned long cur_dblock, unsigned long oldest_start, 
+                                    unsigned long oldest_trans_id, unsigned long newest_mount_id) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_desc *desc ;
+  struct reiserfs_journal_commit *commit ;
+  unsigned long trans_id = 0 ;
+  struct buffer_head *c_bh ;
+  struct buffer_head *d_bh ;
+  struct buffer_head **log_blocks = NULL ;
+  struct buffer_head **real_blocks = NULL ;
+  unsigned long trans_offset ;
+  int i;
+  int trans_half;
+
+  d_bh = journal_bread(p_s_sb, cur_dblock) ;
+  if (!d_bh)
+    return 1 ;
+  desc = (struct reiserfs_journal_desc *)d_bh->b_data ;
+  trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ;
+  reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1037: "
+                 "journal_read_transaction, offset %llu, len %d mount_id %d",
+                 d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                 get_desc_trans_len(desc), get_desc_mount_id(desc)) ;
+  if (get_desc_trans_id(desc) < oldest_trans_id) {
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1039: "
+                   "journal_read_trans skipping because %lu is too old",
+                   cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ;
+    brelse(d_bh) ;
+    return 1 ;
+  }
+  if (get_desc_mount_id(desc) != newest_mount_id) {
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1146: "
+                   "journal_read_trans skipping because %d is != "
+                   "newest_mount_id %lu", get_desc_mount_id(desc),
+                    newest_mount_id) ;
+    brelse(d_bh) ;
+    return 1 ;
+  }
+  c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+                ((trans_offset + get_desc_trans_len(desc) + 1) % 
+                 SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ;
+  if (!c_bh) {
+    brelse(d_bh) ;
+    return 1 ;
+  }
+  commit = (struct reiserfs_journal_commit *)c_bh->b_data ;
+  if (journal_compare_desc_commit(p_s_sb, desc, commit)) {
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal_read_transaction, "
+                   "commit offset %llu had bad time %d or length %d",
+                   c_bh->b_blocknr -  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                   get_commit_trans_id(commit), get_commit_trans_len(commit));
+    brelse(c_bh) ;
+    brelse(d_bh) ;
+    return 1; 
+  }
+  trans_id = get_desc_trans_id(desc) ;
+  /* now we know we've got a good transaction, and it was inside the valid time ranges */
+  log_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ;
+  real_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ;
+  if (!log_blocks  || !real_blocks) {
+    brelse(c_bh) ;
+    brelse(d_bh) ;
+    reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+    reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+    reiserfs_warning(p_s_sb, "journal-1169: kmalloc failed, unable to mount FS") ;
+    return -1 ;
+  }
+  /* get all the buffer heads */
+  trans_half = journal_trans_half (p_s_sb->s_blocksize) ;
+  for(i = 0 ; i < get_desc_trans_len(desc) ; i++) {
+    log_blocks[i] =  journal_getblk(p_s_sb,  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + (trans_offset + 1 + i) % SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+    if (i < trans_half) {
+      real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(desc->j_realblock[i])) ;
+    } else {
+      real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(commit->j_realblock[i - trans_half])) ;
+    }
+    if ( real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(p_s_sb) ) {
+      reiserfs_warning(p_s_sb, "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
+      goto abort_replay;
+    }
+    /* make sure we don't try to replay onto log or reserved area */
+    if (is_block_in_log_or_reserved_area(p_s_sb, real_blocks[i]->b_blocknr)) {
+      reiserfs_warning(p_s_sb, "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block") ;
+abort_replay:
+      brelse_array(log_blocks, i) ;
+      brelse_array(real_blocks, i) ;
+      brelse(c_bh) ;
+      brelse(d_bh) ;
+      reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      return -1 ;
+    }
+  }
+  /* read in the log blocks, memcpy to the corresponding real block */
+  ll_rw_block(READ, get_desc_trans_len(desc), log_blocks) ;
+  for (i = 0 ; i < get_desc_trans_len(desc) ; i++) {
+    wait_on_buffer(log_blocks[i]) ;
+    if (!buffer_uptodate(log_blocks[i])) {
+      reiserfs_warning(p_s_sb, "journal-1212: REPLAY FAILURE fsck required! buffer write failed") ;
+      brelse_array(log_blocks + i, get_desc_trans_len(desc) - i) ;
+      brelse_array(real_blocks, get_desc_trans_len(desc)) ;
+      brelse(c_bh) ;
+      brelse(d_bh) ;
+      reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      return -1 ;
+    }
+    memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, real_blocks[i]->b_size) ;
+    set_buffer_uptodate(real_blocks[i]) ;
+    brelse(log_blocks[i]) ;
+  }
+  /* flush out the real blocks */
+  for (i = 0 ; i < get_desc_trans_len(desc) ; i++) {
+    set_buffer_dirty(real_blocks[i]) ;
+    ll_rw_block(WRITE, 1, real_blocks + i) ;
+  }
+  for (i = 0 ; i < get_desc_trans_len(desc) ; i++) {
+    wait_on_buffer(real_blocks[i]) ; 
+    if (!buffer_uptodate(real_blocks[i])) {
+      reiserfs_warning(p_s_sb, "journal-1226: REPLAY FAILURE, fsck required! buffer write failed") ;
+      brelse_array(real_blocks + i, get_desc_trans_len(desc) - i) ;
+      brelse(c_bh) ;
+      brelse(d_bh) ;
+      reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ;
+      return -1 ;
+    }
+    brelse(real_blocks[i]) ;
+  }
+  cur_dblock =  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + ((trans_offset + get_desc_trans_len(desc) + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ;
+  reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1095: setting journal "
+                 "start to offset %ld",
+                 cur_dblock -  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ;
+  
+  /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
+  journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ;
+  journal->j_last_flush_trans_id = trans_id ;
+  journal->j_trans_id = trans_id + 1;
+  brelse(c_bh) ;
+  brelse(d_bh) ;
+  reiserfs_kfree(log_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ;
+  reiserfs_kfree(real_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ;
+  return 0 ;
+}
+
+/* This function reads blocks starting from block and to max_block of bufsize
+   size (but no more than BUFNR blocks at a time). This proved to improve
+   mounting speed on self-rebuilding raid5 arrays at least.
+   Right now it is only used from journal code. But later we might use it
+   from other places.
+   Note: Do not use journal_getblk/sb_getblk functions here! */
+static struct buffer_head * reiserfs_breada (struct block_device *dev, int block, int bufsize,
+                            unsigned int max_block)
+{
+        struct buffer_head * bhlist[BUFNR];
+        unsigned int blocks = BUFNR;
+        struct buffer_head * bh;
+        int i, j;
+        
+        bh = __getblk (dev, block, bufsize );
+        if (buffer_uptodate (bh))
+                return (bh);   
+                
+        if (block + BUFNR > max_block) {
+                blocks = max_block - block;
+        }
+        bhlist[0] = bh;
+        j = 1;
+        for (i = 1; i < blocks; i++) {
+                bh = __getblk (dev, block + i, bufsize);
+                if (buffer_uptodate (bh)) {
+                        brelse (bh);
+                        break;
+                }
+                else bhlist[j++] = bh;
+        }
+        ll_rw_block (READ, j, bhlist);
+        for(i = 1; i < j; i++) 
+                brelse (bhlist[i]);
+        bh = bhlist[0];
+        wait_on_buffer (bh);
+        if (buffer_uptodate (bh))
+                return bh;
+        brelse (bh);
+        return NULL;
+}
+
+/*
+** read and replay the log
+** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
+** transaction.  This tests that before finding all the transactions in the log, which makes normal mount times fast.
+**
+** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
+**
+** On exit, it sets things up so the first transaction will work correctly.
+*/
+static int journal_read(struct super_block *p_s_sb) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_desc *desc ;
+  unsigned long oldest_trans_id = 0;
+  unsigned long oldest_invalid_trans_id = 0 ;
+  time_t start ;
+  unsigned long oldest_start = 0;
+  unsigned long cur_dblock = 0 ;
+  unsigned long newest_mount_id = 9 ;
+  struct buffer_head *d_bh ;
+  struct reiserfs_journal_header *jh ;
+  int valid_journal_header = 0 ;
+  int replay_count = 0 ;
+  int continue_replay = 1 ;
+  int ret ;
+  char b[BDEVNAME_SIZE];
+
+  cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ;
+  reiserfs_info (p_s_sb, "checking transaction log (%s)\n",
+         bdevname(journal->j_dev_bd, b));
+  start = get_seconds();
+
+  /* step 1, read in the journal header block.  Check the transaction it says 
+  ** is the first unflushed, and if that transaction is not valid, 
+  ** replay is done
+  */
+  journal->j_header_bh = journal_bread(p_s_sb,
+                                           SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 
+                                           SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+  if (!journal->j_header_bh) {
+    return 1 ;
+  }
+  jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ;
+  if (le32_to_cpu(jh->j_first_unflushed_offset) >= 0 && 
+      le32_to_cpu(jh->j_first_unflushed_offset) < SB_ONDISK_JOURNAL_SIZE(p_s_sb) && 
+      le32_to_cpu(jh->j_last_flush_trans_id) > 0) {
+    oldest_start = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 
+                       le32_to_cpu(jh->j_first_unflushed_offset) ;
+    oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
+    newest_mount_id = le32_to_cpu(jh->j_mount_id);
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1153: found in "
+                   "header: first_unflushed_offset %d, last_flushed_trans_id "
+                   "%lu", le32_to_cpu(jh->j_first_unflushed_offset),
+                   le32_to_cpu(jh->j_last_flush_trans_id)) ;
+    valid_journal_header = 1 ;
+
+    /* now, we try to read the first unflushed offset.  If it is not valid, 
+    ** there is nothing more we can do, and it makes no sense to read 
+    ** through the whole log.
+    */
+    d_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + le32_to_cpu(jh->j_first_unflushed_offset)) ;
+    ret = journal_transaction_is_valid(p_s_sb, d_bh, NULL, NULL) ;
+    if (!ret) {
+      continue_replay = 0 ;
+    }
+    brelse(d_bh) ;
+    goto start_log_replay;
+  }
+
+  if (continue_replay && bdev_read_only(p_s_sb->s_bdev)) {
+    reiserfs_warning (p_s_sb,
+                      "clm-2076: device is readonly, unable to replay log") ;
+    return -1 ;
+  }
+
+  /* ok, there are transactions that need to be replayed.  start with the first log block, find
+  ** all the valid transactions, and pick out the oldest.
+  */
+  while(continue_replay && cur_dblock < (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb))) {
+    /* Note that it is required for blocksize of primary fs device and journal
+       device to be the same */
+    d_bh = reiserfs_breada(journal->j_dev_bd, cur_dblock, p_s_sb->s_blocksize,
+                           SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ;
+    ret = journal_transaction_is_valid(p_s_sb, d_bh, &oldest_invalid_trans_id, &newest_mount_id) ;
+    if (ret == 1) {
+      desc = (struct reiserfs_journal_desc *)d_bh->b_data ;
+      if (oldest_start == 0) { /* init all oldest_ values */
+        oldest_trans_id = get_desc_trans_id(desc) ;
+        oldest_start = d_bh->b_blocknr ;
+        newest_mount_id = get_desc_mount_id(desc) ;
+        reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1179: Setting "
+                       "oldest_start to offset %llu, trans_id %lu",
+                       oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                       oldest_trans_id) ;
+      } else if (oldest_trans_id > get_desc_trans_id(desc)) { 
+        /* one we just read was older */
+        oldest_trans_id = get_desc_trans_id(desc) ;
+        oldest_start = d_bh->b_blocknr ;
+        reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1180: Resetting "
+                       "oldest_start to offset %lu, trans_id %lu",
+                        oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                        oldest_trans_id) ;
+      }
+      if (newest_mount_id < get_desc_mount_id(desc)) {
+        newest_mount_id = get_desc_mount_id(desc) ;
+        reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
+                      "newest_mount_id to %d", get_desc_mount_id(desc));
+      }
+      cur_dblock += get_desc_trans_len(desc) + 2 ;
+    } else {
+      cur_dblock++ ;
+    }
+    brelse(d_bh) ;
+  }
+
+start_log_replay:
+  cur_dblock = oldest_start ;
+  if (oldest_trans_id)  {
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1206: Starting replay "
+                   "from offset %llu, trans_id %lu",
+                   cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), 
+                   oldest_trans_id) ;
+
+  }
+  replay_count = 0 ;
+  while(continue_replay && oldest_trans_id > 0) {
+    ret = journal_read_transaction(p_s_sb, cur_dblock, oldest_start, oldest_trans_id, newest_mount_id) ;
+    if (ret < 0) {
+      return ret ;
+    } else if (ret != 0) {
+      break ;
+    }
+    cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start ;
+    replay_count++ ;
+   if (cur_dblock == oldest_start)
+        break;
+  }
+
+  if (oldest_trans_id == 0) {
+    reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1225: No valid "
+                   "transactions found") ;
+  }
+  /* j_start does not get set correctly if we don't replay any transactions.
+  ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
+  ** copy the trans_id from the header
+  */
+  if (valid_journal_header && replay_count == 0) { 
+    journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset) ;
+    journal->j_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
+    journal->j_last_flush_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) ;
+    journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1;
+  } else {
+    journal->j_mount_id = newest_mount_id + 1 ;
+  }
+  reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
+                 "newest_mount_id to %lu", journal->j_mount_id) ;
+  journal->j_first_unflushed_offset = journal->j_start ;
+  if (replay_count > 0) {
+    reiserfs_info (p_s_sb, "replayed %d transactions in %lu seconds\n",
+                   replay_count, get_seconds() - start) ;
+  }
+  if (!bdev_read_only(p_s_sb->s_bdev) && 
+       _update_journal_header_block(p_s_sb, journal->j_start,
+                                   journal->j_last_flush_trans_id))
+  {
+      /* replay failed, caller must call free_journal_ram and abort
+      ** the mount
+      */
+      return -1 ;
+  }
+  return 0 ;
+}
+
+static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
+{
+    struct reiserfs_journal_list *jl;
+retry:
+    jl = reiserfs_kmalloc(sizeof(struct reiserfs_journal_list), GFP_NOFS, s);
+    if (!jl) {
+        yield();
+        goto retry;
+    }
+    memset(jl, 0, sizeof(*jl));
+    INIT_LIST_HEAD(&jl->j_list);
+    INIT_LIST_HEAD(&jl->j_working_list);
+    INIT_LIST_HEAD(&jl->j_tail_bh_list);
+    INIT_LIST_HEAD(&jl->j_bh_list);
+    sema_init(&jl->j_commit_lock, 1);
+    SB_JOURNAL(s)->j_num_lists++;
+    get_journal_list(jl);
+    return jl;
+}
+
+static void journal_list_init(struct super_block *p_s_sb) {
+    SB_JOURNAL(p_s_sb)->j_current_jl = alloc_journal_list(p_s_sb);
+}
+
+static int release_journal_dev( struct super_block *super,
+                                struct reiserfs_journal *journal )
+{
+    int result;
+    
+    result = 0;
+
+    if( journal -> j_dev_file != NULL ) {
+        result = filp_close( journal -> j_dev_file, NULL );
+        journal -> j_dev_file = NULL;
+        journal -> j_dev_bd = NULL;
+    } else if( journal -> j_dev_bd != NULL ) {
+        result = blkdev_put( journal -> j_dev_bd );
+        journal -> j_dev_bd = NULL;
+    }
+
+    if( result != 0 ) {
+        reiserfs_warning(super, "sh-457: release_journal_dev: Cannot release journal device: %i", result );
+    }
+    return result;
+}
+
+static int journal_init_dev( struct super_block *super, 
+                             struct reiserfs_journal *journal, 
+                             const char *jdev_name )
+{
+        int result;
+        dev_t jdev;
+        int blkdev_mode = FMODE_READ | FMODE_WRITE;
+        char b[BDEVNAME_SIZE];
+
+        result = 0;
+
+        journal -> j_dev_bd = NULL;
+        journal -> j_dev_file = NULL;
+        jdev = SB_ONDISK_JOURNAL_DEVICE( super ) ?
+                new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; 
+
+        if (bdev_read_only(super->s_bdev))
+            blkdev_mode = FMODE_READ;
+
+        /* there is no "jdev" option and journal is on separate device */
+        if( ( !jdev_name || !jdev_name[ 0 ] ) ) {
+                journal->j_dev_bd = open_by_devnum(jdev, blkdev_mode);
+                if (IS_ERR(journal->j_dev_bd)) {
+                        result = PTR_ERR(journal->j_dev_bd);
+                        journal->j_dev_bd = NULL;
+                        reiserfs_warning (super, "sh-458: journal_init_dev: "
+                                          "cannot init journal device '%s': %i",
+                                          __bdevname(jdev, b), result );
+                        return result;
+                } else if (jdev != super->s_dev)
+                        set_blocksize(journal->j_dev_bd, super->s_blocksize);
+                return 0;
+        }
+
+        journal -> j_dev_file = filp_open( jdev_name, 0, 0 );
+        if( !IS_ERR( journal -> j_dev_file ) ) {
+                struct inode *jdev_inode = journal->j_dev_file->f_mapping->host;
+                if( !S_ISBLK( jdev_inode -> i_mode ) ) {
+                        reiserfs_warning  (super, "journal_init_dev: '%s' is "
+                                           "not a block device", jdev_name );
+                        result = -ENOTBLK;
+                } else  {
+                        /* ok */
+                        journal->j_dev_bd = I_BDEV(jdev_inode);
+                        set_blocksize(journal->j_dev_bd, super->s_blocksize);
+                }
+        } else {
+                result = PTR_ERR( journal -> j_dev_file );
+                journal -> j_dev_file = NULL;
+                reiserfs_warning (super,
+                                  "journal_init_dev: Cannot open '%s': %i",
+                                  jdev_name, result );
+        }
+        if( result != 0 ) {
+                release_journal_dev( super, journal );
+        }
+        reiserfs_info(super, "journal_init_dev: journal device: %s\n",
+                bdevname(journal->j_dev_bd, b));
+        return result;
+}
+
+/*
+** must be called once on fs mount.  calls journal_read for you
+*/
+int journal_init(struct super_block *p_s_sb, const char * j_dev_name, int old_format, unsigned int commit_max_age) {
+    int num_cnodes = SB_ONDISK_JOURNAL_SIZE(p_s_sb) * 2 ;
+    struct buffer_head *bhjh;
+    struct reiserfs_super_block * rs;
+    struct reiserfs_journal_header *jh;
+    struct reiserfs_journal *journal;
+    struct reiserfs_journal_list *jl;
+    char b[BDEVNAME_SIZE];
+
+    journal = SB_JOURNAL(p_s_sb) = vmalloc(sizeof (struct reiserfs_journal)) ;
+    if (!journal) {
+        reiserfs_warning (p_s_sb, "journal-1256: unable to get memory for journal structure") ;
+        return 1 ;
+    }
+    memset(journal, 0, sizeof(struct reiserfs_journal)) ;
+    INIT_LIST_HEAD(&journal->j_bitmap_nodes) ;
+    INIT_LIST_HEAD (&journal->j_prealloc_list);
+    INIT_LIST_HEAD(&journal->j_working_list);
+    INIT_LIST_HEAD(&journal->j_journal_list);
+    journal->j_persistent_trans = 0;
+    if (reiserfs_allocate_list_bitmaps(p_s_sb,
+                                       journal->j_list_bitmap,
+                                       SB_BMAP_NR(p_s_sb)))
+        goto free_and_return ;
+    allocate_bitmap_nodes(p_s_sb) ;
+
+    /* reserved for journal area support */
+    SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) = (old_format ?
+                                             REISERFS_OLD_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize +
+                                             SB_BMAP_NR(p_s_sb) + 1 :
+                                             REISERFS_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize + 2); 
+    
+    /* Sanity check to see is the standard journal fitting withing first bitmap
+       (actual for small blocksizes) */
+    if ( !SB_ONDISK_JOURNAL_DEVICE( p_s_sb ) &&
+         (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb) > p_s_sb->s_blocksize * 8) ) {
+        reiserfs_warning (p_s_sb, "journal-1393: journal does not fit for area "
+                          "addressed by first of bitmap blocks. It starts at "
+                          "%u and its size is %u. Block size %ld",
+                          SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb),
+                          SB_ONDISK_JOURNAL_SIZE(p_s_sb), p_s_sb->s_blocksize);
+        goto free_and_return;
+    }
+
+    if( journal_init_dev( p_s_sb, journal, j_dev_name ) != 0 ) {
+      reiserfs_warning (p_s_sb, "sh-462: unable to initialize jornal device");
+      goto free_and_return;
+    }
+
+     rs = SB_DISK_SUPER_BLOCK(p_s_sb);
+     
+     /* read journal header */
+     bhjh = journal_bread(p_s_sb,
+                   SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+     if (!bhjh) {
+         reiserfs_warning (p_s_sb, "sh-459: unable to read journal header");
+         goto free_and_return;
+     }
+     jh = (struct reiserfs_journal_header *)(bhjh->b_data);
+     
+     /* make sure that journal matches to the super block */
+     if (is_reiserfs_jr(rs) && (jh->jh_journal.jp_journal_magic != sb_jp_journal_magic(rs))) {
+         reiserfs_warning (p_s_sb, "sh-460: journal header magic %x "
+                           "(device %s) does not match to magic found in super "
+                           "block %x",
+                           jh->jh_journal.jp_journal_magic,
+                           bdevname( journal->j_dev_bd, b),
+                           sb_jp_journal_magic(rs));
+         brelse (bhjh);
+         goto free_and_return;
+  }
+     
+  journal->j_trans_max      = le32_to_cpu (jh->jh_journal.jp_journal_trans_max);
+  journal->j_max_batch      = le32_to_cpu (jh->jh_journal.jp_journal_max_batch);
+  journal->j_max_commit_age = le32_to_cpu (jh->jh_journal.jp_journal_max_commit_age);
+  journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
+
+  if (journal->j_trans_max) {
+    /* make sure these parameters are available, assign it if they are not */
+    __u32 initial = journal->j_trans_max;
+    __u32 ratio = 1;
+    
+    if (p_s_sb->s_blocksize < 4096)
+      ratio = 4096 / p_s_sb->s_blocksize;
+    
+    if (SB_ONDISK_JOURNAL_SIZE(p_s_sb)/journal->j_trans_max < JOURNAL_MIN_RATIO)
+      journal->j_trans_max = SB_ONDISK_JOURNAL_SIZE(p_s_sb) / JOURNAL_MIN_RATIO;
+    if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio)
+      journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT / ratio;
+    if (journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio)
+      journal->j_trans_max = JOURNAL_TRANS_MIN_DEFAULT / ratio;
+    
+    if (journal->j_trans_max != initial)
+      reiserfs_warning (p_s_sb, "sh-461: journal_init: wrong transaction max size (%u). Changed to %u",
+              initial, journal->j_trans_max);
+
+    journal->j_max_batch = journal->j_trans_max*
+      JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT;
+  }  
+  
+  if (!journal->j_trans_max) {
+    /*we have the file system was created by old version of mkreiserfs 
+      so this field contains zero value */
+    journal->j_trans_max      = JOURNAL_TRANS_MAX_DEFAULT ;
+    journal->j_max_batch      = JOURNAL_MAX_BATCH_DEFAULT ;
+    journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE ;
+    
+    /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096
+       trans max size is decreased proportionally */
+    if (p_s_sb->s_blocksize < 4096) {
+      journal->j_trans_max /= (4096 / p_s_sb->s_blocksize) ;
+      journal->j_max_batch = (journal->j_trans_max) * 9 / 10 ;
+    }
+  }
+
+  journal->j_default_max_commit_age = journal->j_max_commit_age;
+
+  if (commit_max_age != 0) {
+      journal->j_max_commit_age = commit_max_age;
+      journal->j_max_trans_age = commit_max_age;
+  }
+
+  reiserfs_info (p_s_sb, "journal params: device %s, size %u, "
+                 "journal first block %u, max trans len %u, max batch %u, "
+                 "max commit age %u, max trans age %u\n",
+                 bdevname( journal->j_dev_bd, b),
+                 SB_ONDISK_JOURNAL_SIZE(p_s_sb),
+                 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+                 journal->j_trans_max,
+                 journal->j_max_batch,
+                 journal->j_max_commit_age,
+                 journal->j_max_trans_age);
+
+  brelse (bhjh);
+     
+  journal->j_list_bitmap_index = 0 ;
+  journal_list_init(p_s_sb) ;
+
+  memset(journal->j_list_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ;
+
+  INIT_LIST_HEAD(&journal->j_dirty_buffers) ;
+  spin_lock_init(&journal->j_dirty_buffers_lock) ;
+
+  journal->j_start = 0 ;
+  journal->j_len = 0 ;
+  journal->j_len_alloc = 0 ;
+  atomic_set(&(journal->j_wcount), 0) ;
+  atomic_set(&(journal->j_async_throttle), 0) ;
+  journal->j_bcount = 0 ;
+  journal->j_trans_start_time = 0 ;
+  journal->j_last = NULL ;
+  journal->j_first = NULL ;
+  init_waitqueue_head(&(journal->j_join_wait)) ;
+  sema_init(&journal->j_lock, 1);
+  sema_init(&journal->j_flush_sem, 1);
+
+  journal->j_trans_id = 10 ;
+  journal->j_mount_id = 10 ;
+  journal->j_state = 0 ;
+  atomic_set(&(journal->j_jlock), 0) ;
+  journal->j_cnode_free_list = allocate_cnodes(num_cnodes) ;
+  journal->j_cnode_free_orig = journal->j_cnode_free_list ;
+  journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0 ;
+  journal->j_cnode_used = 0 ;
+  journal->j_must_wait = 0 ;
+
+  init_journal_hash(p_s_sb) ;
+  jl = journal->j_current_jl;
+  jl->j_list_bitmap = get_list_bitmap(p_s_sb, jl);
+  if (!jl->j_list_bitmap) {
+    reiserfs_warning(p_s_sb, "journal-2005, get_list_bitmap failed for journal list 0") ;
+    goto free_and_return;
+  }
+  if (journal_read(p_s_sb) < 0) {
+    reiserfs_warning(p_s_sb, "Replay Failure, unable to mount") ;
+    goto free_and_return;
+  }
+
+  reiserfs_mounted_fs_count++ ;
+  if (reiserfs_mounted_fs_count <= 1)
+    commit_wq = create_workqueue("reiserfs");
+
+  INIT_WORK(&journal->j_work, flush_async_commits, p_s_sb);
+  return 0 ;
+free_and_return:
+  free_journal_ram(p_s_sb);
+  return 1;
+}
+
+/*
+** test for a polite end of the current transaction.  Used by file_write, and should
+** be used by delete to make sure they don't write more than can fit inside a single
+** transaction
+*/
+int journal_transaction_should_end(struct reiserfs_transaction_handle *th, int new_alloc) {
+  struct reiserfs_journal *journal = SB_JOURNAL (th->t_super);
+  time_t now = get_seconds() ;
+  /* cannot restart while nested */
+  BUG_ON (!th->t_trans_id);
+  if (th->t_refcount > 1)
+    return 0 ;
+  if ( journal->j_must_wait > 0 ||
+       (journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
+       atomic_read(&(journal->j_jlock)) ||
+      (now - journal->j_trans_start_time) > journal->j_max_trans_age ||
+       journal->j_cnode_free < (journal->j_trans_max * 3)) {
+    return 1 ;
+  }
+  return 0 ;
+}
+
+/* this must be called inside a transaction, and requires the 
+** kernel_lock to be held
+*/
+void reiserfs_block_writes(struct reiserfs_transaction_handle *th) {
+    struct reiserfs_journal *journal = SB_JOURNAL (th->t_super);
+    BUG_ON (!th->t_trans_id);
+    journal->j_must_wait = 1 ;
+    set_bit(J_WRITERS_BLOCKED, &journal->j_state) ;
+    return ;
+}
+
+/* this must be called without a transaction started, and does not
+** require BKL
+*/
+void reiserfs_allow_writes(struct super_block *s) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    clear_bit(J_WRITERS_BLOCKED, &journal->j_state) ;
+    wake_up(&journal->j_join_wait) ;
+}
+
+/* this must be called without a transaction started, and does not
+** require BKL
+*/
+void reiserfs_wait_on_write_block(struct super_block *s) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    wait_event(journal->j_join_wait,
+               !test_bit(J_WRITERS_BLOCKED, &journal->j_state)) ;
+}
+
+static void queue_log_writer(struct super_block *s) {
+    wait_queue_t wait;
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    set_bit(J_WRITERS_QUEUED, &journal->j_state);
+
+    /*
+     * we don't want to use wait_event here because
+     * we only want to wait once.
+     */
+    init_waitqueue_entry(&wait, current);
+    add_wait_queue(&journal->j_join_wait, &wait);
+    set_current_state(TASK_UNINTERRUPTIBLE);
+    if (test_bit(J_WRITERS_QUEUED, &journal->j_state))
+        schedule();
+    current->state = TASK_RUNNING;
+    remove_wait_queue(&journal->j_join_wait, &wait);
+}
+
+static void wake_queued_writers(struct super_block *s) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state))
+        wake_up(&journal->j_join_wait);
+}
+
+static void let_transaction_grow(struct super_block *sb,
+                                 unsigned long trans_id)
+{
+    struct reiserfs_journal *journal = SB_JOURNAL (sb);
+    unsigned long bcount = journal->j_bcount;
+    while(1) {
+        set_current_state(TASK_UNINTERRUPTIBLE);
+        schedule_timeout(1);
+        journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
+        while ((atomic_read(&journal->j_wcount) > 0 ||
+                atomic_read(&journal->j_jlock)) &&
+               journal->j_trans_id == trans_id) {
+            queue_log_writer(sb);
+        }
+        if (journal->j_trans_id != trans_id)
+            break;
+        if (bcount == journal->j_bcount)
+            break;
+        bcount = journal->j_bcount;
+    }
+}
+
+/* join == true if you must join an existing transaction.
+** join == false if you can deal with waiting for others to finish
+**
+** this will block until the transaction is joinable.  send the number of blocks you
+** expect to use in nblocks.
+*/
+static int do_journal_begin_r(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb,unsigned long nblocks,int join) {
+  time_t now = get_seconds() ;
+  int old_trans_id  ;
+  struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+  struct reiserfs_transaction_handle myth;
+  int sched_count = 0;
+  int retval;
+
+  reiserfs_check_lock_depth(p_s_sb, "journal_begin") ;
+
+  PROC_INFO_INC( p_s_sb, journal.journal_being );
+  /* set here for journal_join */
+  th->t_refcount = 1;
+  th->t_super = p_s_sb ;
+
+relock:
+  lock_journal(p_s_sb) ;
+  if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted (journal)) {
+    unlock_journal (p_s_sb);
+    retval = journal->j_errno;
+    goto out_fail;
+  }
+  journal->j_bcount++;
+
+  if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
+    unlock_journal(p_s_sb) ;
+    reiserfs_wait_on_write_block(p_s_sb) ;
+    PROC_INFO_INC( p_s_sb, journal.journal_relock_writers );
+    goto relock ;
+  }
+  now = get_seconds();
+
+  /* if there is no room in the journal OR
+  ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 
+  ** we don't sleep if there aren't other writers
+  */
+
+  if ( (!join && journal->j_must_wait > 0) ||
+     ( !join && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) ||
+     (!join && atomic_read(&journal->j_wcount) > 0 && journal->j_trans_start_time > 0 &&
+      (now - journal->j_trans_start_time) > journal->j_max_trans_age) ||
+     (!join && atomic_read(&journal->j_jlock)) ||
+     (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
+
+    old_trans_id = journal->j_trans_id;
+    unlock_journal(p_s_sb) ; /* allow others to finish this transaction */
+
+    if (!join && (journal->j_len_alloc + nblocks + 2) >=
+        journal->j_max_batch &&
+        ((journal->j_len + nblocks + 2) * 100) < (journal->j_len_alloc * 75))
+    {
+        if (atomic_read(&journal->j_wcount) > 10) {
+            sched_count++;
+            queue_log_writer(p_s_sb);
+            goto relock;
+        }
+    }
+    /* don't mess with joining the transaction if all we have to do is
+     * wait for someone else to do a commit
+     */
+    if (atomic_read(&journal->j_jlock)) {
+        while (journal->j_trans_id == old_trans_id &&
+               atomic_read(&journal->j_jlock)) {
+            queue_log_writer(p_s_sb);
+        }
+        goto relock;
+    }
+    retval = journal_join(&myth, p_s_sb, 1) ;
+    if (retval)
+        goto out_fail;
+
+    /* someone might have ended the transaction while we joined */
+    if (old_trans_id != journal->j_trans_id) {
+        retval = do_journal_end(&myth, p_s_sb, 1, 0) ;
+    } else {
+        retval = do_journal_end(&myth, p_s_sb, 1, COMMIT_NOW) ;
+    }
+
+    if (retval)
+        goto out_fail;
+
+    PROC_INFO_INC( p_s_sb, journal.journal_relock_wcount );
+    goto relock ;
+  }
+  /* we are the first writer, set trans_id */
+  if (journal->j_trans_start_time == 0) {
+    journal->j_trans_start_time = get_seconds();
+  }
+  atomic_inc(&(journal->j_wcount)) ;
+  journal->j_len_alloc += nblocks ;
+  th->t_blocks_logged = 0 ;
+  th->t_blocks_allocated = nblocks ;
+  th->t_trans_id = journal->j_trans_id ;
+  unlock_journal(p_s_sb) ;
+  INIT_LIST_HEAD (&th->t_list);
+  return 0 ;
+
+out_fail:
+  memset (th, 0, sizeof (*th));
+  /* Re-set th->t_super, so we can properly keep track of how many
+   * persistent transactions there are. We need to do this so if this
+   * call is part of a failed restart_transaction, we can free it later */
+  th->t_super = p_s_sb;
+  return retval;
+}
+
+struct reiserfs_transaction_handle *
+reiserfs_persistent_transaction(struct super_block *s, int nblocks) {
+    int ret ;
+    struct reiserfs_transaction_handle *th ;
+
+    /* if we're nesting into an existing transaction.  It will be
+    ** persistent on its own
+    */
+    if (reiserfs_transaction_running(s)) {
+        th = current->journal_info ;
+        th->t_refcount++ ;
+        if (th->t_refcount < 2) {
+            BUG() ;
+        }
+        return th ;
+    }
+    th = reiserfs_kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS, s) ;
+    if (!th)
+       return NULL;
+    ret = journal_begin(th, s, nblocks) ;
+    if (ret) {
+        reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ;
+        return NULL;
+    }
+
+    SB_JOURNAL(s)->j_persistent_trans++;
+    return th ;
+}
+
+int
+reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) {
+    struct super_block *s = th->t_super;
+    int ret = 0;
+    if (th->t_trans_id)
+        ret = journal_end(th, th->t_super, th->t_blocks_allocated);
+    else
+        ret = -EIO;
+    if (th->t_refcount == 0) {
+        SB_JOURNAL(s)->j_persistent_trans--;
+        reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ;
+    }
+    return ret;
+}
+
+static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) {
+  struct reiserfs_transaction_handle *cur_th = current->journal_info;
+
+  /* this keeps do_journal_end from NULLing out the current->journal_info
+  ** pointer
+  */
+  th->t_handle_save = cur_th ;
+  if (cur_th && cur_th->t_refcount > 1) {
+      BUG() ;
+  }
+  return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_JOIN) ;
+}
+
+int journal_join_abort(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) {
+  struct reiserfs_transaction_handle *cur_th = current->journal_info;
+
+  /* this keeps do_journal_end from NULLing out the current->journal_info
+  ** pointer
+  */
+  th->t_handle_save = cur_th ;
+  if (cur_th && cur_th->t_refcount > 1) {
+      BUG() ;
+  }
+  return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_ABORT) ;
+}
+
+int journal_begin(struct reiserfs_transaction_handle *th, struct super_block  * p_s_sb, unsigned long nblocks) {
+    struct reiserfs_transaction_handle *cur_th = current->journal_info ;
+    int ret ;
+
+    th->t_handle_save = NULL ;
+    if (cur_th) {
+        /* we are nesting into the current transaction */
+        if (cur_th->t_super == p_s_sb) {
+              BUG_ON (!cur_th->t_refcount);
+              cur_th->t_refcount++ ;
+              memcpy(th, cur_th, sizeof(*th));
+              if (th->t_refcount <= 1)
+                      reiserfs_warning (p_s_sb, "BAD: refcount <= 1, but journal_info != 0");
+              return 0;
+        } else {
+            /* we've ended up with a handle from a different filesystem.
+            ** save it and restore on journal_end.  This should never
+            ** really happen...
+            */
+            reiserfs_warning(p_s_sb, "clm-2100: nesting info a different FS") ;
+            th->t_handle_save = current->journal_info ;
+            current->journal_info = th;
+        }
+    } else {
+        current->journal_info = th;
+    }
+    ret = do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_REG) ;
+    if (current->journal_info != th)
+        BUG() ;
+
+    /* I guess this boils down to being the reciprocal of clm-2100 above.
+     * If do_journal_begin_r fails, we need to put it back, since journal_end
+     * won't be called to do it. */
+    if (ret)
+        current->journal_info = th->t_handle_save;
+    else
+        BUG_ON (!th->t_refcount);
+
+    return ret ;
+}
+
+/*
+** puts bh into the current transaction.  If it was already there, reorders removes the
+** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
+**
+** if it was dirty, cleans and files onto the clean list.  I can't let it be dirty again until the
+** transaction is committed.
+** 
+** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
+*/
+int journal_mark_dirty(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, struct buffer_head *bh) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_cnode *cn = NULL;
+  int count_already_incd = 0 ;
+  int prepared = 0 ;
+  BUG_ON (!th->t_trans_id);
+
+  PROC_INFO_INC( p_s_sb, journal.mark_dirty );
+  if (th->t_trans_id != journal->j_trans_id) {
+    reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", 
+                   th->t_trans_id, journal->j_trans_id);
+  }
+
+  p_s_sb->s_dirt = 1;
+
+  prepared = test_clear_buffer_journal_prepared (bh);
+  clear_buffer_journal_restore_dirty (bh);
+  /* already in this transaction, we are done */
+  if (buffer_journaled(bh)) {
+    PROC_INFO_INC( p_s_sb, journal.mark_dirty_already );
+    return 0 ;
+  }
+
+  /* this must be turned into a panic instead of a warning.  We can't allow
+  ** a dirty or journal_dirty or locked buffer to be logged, as some changes
+  ** could get to disk too early.  NOT GOOD.
+  */
+  if (!prepared || buffer_dirty(bh)) {
+    reiserfs_warning (p_s_sb, "journal-1777: buffer %llu bad state "
+                      "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
+                      (unsigned long long)bh->b_blocknr, prepared ? ' ' : '!',
+                            buffer_locked(bh) ? ' ' : '!',
+                            buffer_dirty(bh) ? ' ' : '!',
+                            buffer_journal_dirty(bh) ? ' ' : '!') ;
+  }
+
+  if (atomic_read(&(journal->j_wcount)) <= 0) {
+    reiserfs_warning (p_s_sb, "journal-1409: journal_mark_dirty returning because j_wcount was %d", atomic_read(&(journal->j_wcount))) ;
+    return 1 ;
+  }
+  /* this error means I've screwed up, and we've overflowed the transaction.  
+  ** Nothing can be done here, except make the FS readonly or panic.
+  */ 
+  if (journal->j_len >= journal->j_trans_max) {
+    reiserfs_panic(th->t_super, "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n", journal->j_len) ;
+  }
+
+  if (buffer_journal_dirty(bh)) {
+    count_already_incd = 1 ;
+    PROC_INFO_INC( p_s_sb, journal.mark_dirty_notjournal );
+    clear_buffer_journal_dirty (bh);
+  }
+
+  if (journal->j_len > journal->j_len_alloc) {
+    journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT ;
+  }
+
+  set_buffer_journaled (bh);
+
+  /* now put this guy on the end */
+  if (!cn) {
+    cn = get_cnode(p_s_sb) ;
+    if (!cn) {
+      reiserfs_panic(p_s_sb, "get_cnode failed!\n"); 
+    }
+
+    if (th->t_blocks_logged == th->t_blocks_allocated) {
+      th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT ;
+      journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT ;
+    }
+    th->t_blocks_logged++ ;
+    journal->j_len++ ;
+
+    cn->bh = bh ;
+    cn->blocknr = bh->b_blocknr ;
+    cn->sb = p_s_sb;
+    cn->jlist = NULL ;
+    insert_journal_hash(journal->j_hash_table, cn) ;
+    if (!count_already_incd) {
+      get_bh(bh) ;
+    }
+  }
+  cn->next = NULL ;
+  cn->prev = journal->j_last ;
+  cn->bh = bh ;
+  if (journal->j_last) {
+    journal->j_last->next = cn ;
+    journal->j_last = cn ;
+  } else {
+    journal->j_first = cn ;
+    journal->j_last = cn ;
+  }
+  return 0 ;
+}
+
+int journal_end(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) {
+  if (!current->journal_info && th->t_refcount > 1)
+    reiserfs_warning (p_s_sb, "REISER-NESTING: th NULL, refcount %d",
+                      th->t_refcount);
+
+  if (!th->t_trans_id) {
+    WARN_ON (1);
+    return -EIO;
+  }
+
+  th->t_refcount--;
+  if (th->t_refcount > 0) {
+    struct reiserfs_transaction_handle *cur_th = current->journal_info ;
+
+    /* we aren't allowed to close a nested transaction on a different
+    ** filesystem from the one in the task struct
+    */
+    if (cur_th->t_super != th->t_super)
+      BUG() ;
+
+    if (th != cur_th) {
+      memcpy(current->journal_info, th, sizeof(*th));
+      th->t_trans_id = 0;
+    }
+    return 0;
+  } else {
+    return do_journal_end(th, p_s_sb, nblocks, 0) ;
+  }
+}
+
+/* removes from the current transaction, relsing and descrementing any counters.  
+** also files the removed buffer directly onto the clean list
+**
+** called by journal_mark_freed when a block has been deleted
+**
+** returns 1 if it cleaned and relsed the buffer. 0 otherwise
+*/
+static int remove_from_transaction(struct super_block *p_s_sb, b_blocknr_t blocknr, int already_cleaned) {
+  struct buffer_head *bh ;
+  struct reiserfs_journal_cnode *cn ;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  int ret = 0;
+
+  cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr) ;
+  if (!cn || !cn->bh) {
+    return ret ;
+  }
+  bh = cn->bh ;
+  if (cn->prev) {
+    cn->prev->next = cn->next ;
+  }
+  if (cn->next) {
+    cn->next->prev = cn->prev ;
+  }
+  if (cn == journal->j_first) {
+    journal->j_first = cn->next ;
+  }
+  if (cn == journal->j_last) {
+    journal->j_last = cn->prev ;
+  }
+  if (bh)
+        remove_journal_hash(p_s_sb, journal->j_hash_table, NULL, bh->b_blocknr, 0) ;
+  clear_buffer_journaled  (bh); /* don't log this one */
+
+  if (!already_cleaned) {
+    clear_buffer_journal_dirty (bh);
+    clear_buffer_dirty(bh);
+    clear_buffer_journal_test (bh);
+    put_bh(bh) ;
+    if (atomic_read(&(bh->b_count)) < 0) {
+      reiserfs_warning (p_s_sb, "journal-1752: remove from trans, b_count < 0");
+    }
+    ret = 1 ;
+  }
+  journal->j_len-- ;
+  journal->j_len_alloc-- ;
+  free_cnode(p_s_sb, cn) ;
+  return ret ;
+}
+
+/*
+** for any cnode in a journal list, it can only be dirtied of all the
+** transactions that include it are commited to disk.
+** this checks through each transaction, and returns 1 if you are allowed to dirty,
+** and 0 if you aren't
+**
+** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
+** blocks for a given transaction on disk
+**
+*/
+static int can_dirty(struct reiserfs_journal_cnode *cn) {
+  struct super_block *sb = cn->sb;
+  b_blocknr_t blocknr = cn->blocknr  ;
+  struct reiserfs_journal_cnode *cur = cn->hprev ;
+  int can_dirty = 1 ;
+  
+  /* first test hprev.  These are all newer than cn, so any node here
+  ** with the same block number and dev means this node can't be sent
+  ** to disk right now.
+  */
+  while(cur && can_dirty) {
+    if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && 
+        cur->blocknr == blocknr) {
+      can_dirty = 0 ;
+    }
+    cur = cur->hprev ;
+  }
+  /* then test hnext.  These are all older than cn.  As long as they
+  ** are committed to the log, it is safe to write cn to disk
+  */
+  cur = cn->hnext ;
+  while(cur && can_dirty) {
+    if (cur->jlist && cur->jlist->j_len > 0 && 
+        atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && 
+        cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
+      can_dirty = 0 ;
+    }
+    cur = cur->hnext ;
+  }
+  return can_dirty ;
+}
+
+/* syncs the commit blocks, but does not force the real buffers to disk
+** will wait until the current transaction is done/commited before returning 
+*/
+int journal_end_sync(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+  BUG_ON (!th->t_trans_id);
+  /* you can sync while nested, very, very bad */
+  if (th->t_refcount > 1) {
+    BUG() ;
+  }
+  if (journal->j_len == 0) {
+    reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ;
+    journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ;
+  }
+  return do_journal_end(th, p_s_sb, nblocks, COMMIT_NOW | WAIT) ;
+}
+
+/*
+** writeback the pending async commits to disk
+*/
+static void flush_async_commits(void *p) {
+  struct super_block *p_s_sb = p;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_list *jl;
+  struct list_head *entry;
+
+  lock_kernel();
+  if (!list_empty(&journal->j_journal_list)) {
+      /* last entry is the youngest, commit it and you get everything */
+      entry = journal->j_journal_list.prev;
+      jl = JOURNAL_LIST_ENTRY(entry);
+      flush_commit_list(p_s_sb, jl, 1);
+  }
+  unlock_kernel();
+  /*
+   * this is a little racey, but there's no harm in missing
+   * the filemap_fdata_write
+   */
+  if (!atomic_read(&journal->j_async_throttle) && !reiserfs_is_journal_aborted (journal)) {
+      atomic_inc(&journal->j_async_throttle);
+      filemap_fdatawrite(p_s_sb->s_bdev->bd_inode->i_mapping);
+      atomic_dec(&journal->j_async_throttle);
+  }
+}
+
+/*
+** flushes any old transactions to disk
+** ends the current transaction if it is too old
+*/
+int reiserfs_flush_old_commits(struct super_block *p_s_sb) {
+    time_t now ;
+    struct reiserfs_transaction_handle th ;
+    struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+    now = get_seconds();
+    /* safety check so we don't flush while we are replaying the log during
+     * mount
+     */
+    if (list_empty(&journal->j_journal_list)) {
+        return 0  ;
+    }
+
+    /* check the current transaction.  If there are no writers, and it is
+     * too old, finish it, and force the commit blocks to disk
+     */
+    if (atomic_read(&journal->j_wcount) <= 0 &&
+        journal->j_trans_start_time > 0 &&
+        journal->j_len > 0 &&
+        (now - journal->j_trans_start_time) > journal->j_max_trans_age)
+    {
+        if (!journal_join(&th, p_s_sb, 1)) {
+            reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ;
+            journal_mark_dirty(&th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ;
+
+            /* we're only being called from kreiserfsd, it makes no sense to do
+            ** an async commit so that kreiserfsd can do it later
+            */
+            do_journal_end(&th, p_s_sb,1, COMMIT_NOW | WAIT) ;
+        }
+    }
+    return p_s_sb->s_dirt;
+}
+
+/*
+** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
+** 
+** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 
+** the writers are done.  By the time it wakes up, the transaction it was called has already ended, so it just
+** flushes the commit list and returns 0.
+**
+** Won't batch when flush or commit_now is set.  Also won't batch when others are waiting on j_join_wait.
+** 
+** Note, we can't allow the journal_end to proceed while there are still writers in the log.
+*/
+static int check_journal_end(struct reiserfs_transaction_handle *th, struct super_block  * p_s_sb, 
+                             unsigned long nblocks, int flags) {
+
+  time_t now ;
+  int flush = flags & FLUSH_ALL ;
+  int commit_now = flags & COMMIT_NOW ;
+  int wait_on_commit = flags & WAIT ;
+  struct reiserfs_journal_list *jl;
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+
+  BUG_ON (!th->t_trans_id);
+
+  if (th->t_trans_id != journal->j_trans_id) {
+    reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", 
+                   th->t_trans_id, journal->j_trans_id);
+  }
+
+  journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged) ;
+  if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed.  unmounting might not call begin */
+    atomic_dec(&(journal->j_wcount)) ;
+  }
+
+  /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 
+  ** will be dealt with by next transaction that actually writes something, but should be taken
+  ** care of in this trans
+  */
+  if (journal->j_len == 0) {
+    BUG();
+  }
+  /* if wcount > 0, and we are called to with flush or commit_now,
+  ** we wait on j_join_wait.  We will wake up when the last writer has
+  ** finished the transaction, and started it on its way to the disk.
+  ** Then, we flush the commit or journal list, and just return 0 
+  ** because the rest of journal end was already done for this transaction.
+  */
+  if (atomic_read(&(journal->j_wcount)) > 0) {
+    if (flush || commit_now) {
+      unsigned trans_id ;
+
+      jl = journal->j_current_jl;
+      trans_id = jl->j_trans_id;
+      if (wait_on_commit)
+        jl->j_state |= LIST_COMMIT_PENDING;
+      atomic_set(&(journal->j_jlock), 1) ;
+      if (flush) {
+        journal->j_next_full_flush = 1 ;
+      }
+      unlock_journal(p_s_sb) ;
+
+      /* sleep while the current transaction is still j_jlocked */
+      while(journal->j_trans_id == trans_id) {
+        if (atomic_read(&journal->j_jlock)) {
+            queue_log_writer(p_s_sb);
+        } else {
+            lock_journal(p_s_sb);
+            if (journal->j_trans_id == trans_id) {
+                atomic_set(&(journal->j_jlock), 1) ;
+            }
+            unlock_journal(p_s_sb);
+        }
+      }
+      if (journal->j_trans_id == trans_id) {
+          BUG();
+      }
+      if (commit_now && journal_list_still_alive(p_s_sb, trans_id) &&
+          wait_on_commit)
+      {
+          flush_commit_list(p_s_sb, jl, 1) ;
+      }
+      return 0 ;
+    } 
+    unlock_journal(p_s_sb) ;
+    return 0 ;
+  }
+
+  /* deal with old transactions where we are the last writers */
+  now = get_seconds();
+  if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) {
+    commit_now = 1 ;
+    journal->j_next_async_flush = 1 ;
+  }
+  /* don't batch when someone is waiting on j_join_wait */
+  /* don't batch when syncing the commit or flushing the whole trans */
+  if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) && !flush && !commit_now &&
+      (journal->j_len < journal->j_max_batch)  &&
+      journal->j_len_alloc < journal->j_max_batch && journal->j_cnode_free > (journal->j_trans_max * 3)) {
+    journal->j_bcount++ ;
+    unlock_journal(p_s_sb) ;
+    return 0 ;
+  }
+
+  if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(p_s_sb)) {
+    reiserfs_panic(p_s_sb, "journal-003: journal_end: j_start (%ld) is too high\n", journal->j_start) ;
+  }
+  return 1 ;
+}
+
+/*
+** Does all the work that makes deleting blocks safe.
+** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
+** 
+** otherwise:
+** set a bit for the block in the journal bitmap.  That will prevent it from being allocated for unformatted nodes
+** before this transaction has finished.
+**
+** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers.  That will prevent any old transactions with
+** this block from trying to flush to the real location.  Since we aren't removing the cnode from the journal_list_hash,
+** the block can't be reallocated yet.
+**
+** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
+*/
+int journal_mark_freed(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, b_blocknr_t blocknr) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_cnode *cn = NULL ;
+  struct buffer_head *bh = NULL ;
+  struct reiserfs_list_bitmap *jb = NULL ;
+  int cleaned = 0 ;
+  BUG_ON (!th->t_trans_id);
+
+  cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr);
+  if (cn && cn->bh) {
+      bh = cn->bh ;
+      get_bh(bh) ;
+  }
+  /* if it is journal new, we just remove it from this transaction */
+  if (bh && buffer_journal_new(bh)) {
+    clear_buffer_journal_new (bh);
+    clear_prepared_bits(bh) ;
+    reiserfs_clean_and_file_buffer(bh) ;
+    cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ;
+  } else {
+    /* set the bit for this block in the journal bitmap for this transaction */
+    jb = journal->j_current_jl->j_list_bitmap;
+    if (!jb) {
+      reiserfs_panic(p_s_sb, "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n") ;
+    }
+    set_bit_in_list_bitmap(p_s_sb, blocknr, jb) ;
+
+    /* Note, the entire while loop is not allowed to schedule.  */
+
+    if (bh) {
+      clear_prepared_bits(bh) ;
+      reiserfs_clean_and_file_buffer(bh) ;
+    }
+    cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ;
+
+    /* find all older transactions with this block, make sure they don't try to write it out */
+    cn = get_journal_hash_dev(p_s_sb,journal->j_list_hash_table,  blocknr) ;
+    while (cn) {
+      if (p_s_sb == cn->sb && blocknr == cn->blocknr) {
+        set_bit(BLOCK_FREED, &cn->state) ;
+        if (cn->bh) {
+          if (!cleaned) {
+            /* remove_from_transaction will brelse the buffer if it was 
+            ** in the current trans
+            */
+            clear_buffer_journal_dirty (cn->bh);
+            clear_buffer_dirty(cn->bh);
+            clear_buffer_journal_test(cn->bh);
+            cleaned = 1 ;
+            put_bh(cn->bh) ;
+            if (atomic_read(&(cn->bh->b_count)) < 0) {
+              reiserfs_warning (p_s_sb, "journal-2138: cn->bh->b_count < 0");
+            }
+          }
+          if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */
+            atomic_dec(&(cn->jlist->j_nonzerolen)) ;
+          }
+          cn->bh = NULL ; 
+        } 
+      }
+      cn = cn->hnext ;
+    }
+  }
+
+  if (bh) {
+    put_bh(bh) ; /* get_hash grabs the buffer */
+    if (atomic_read(&(bh->b_count)) < 0) {
+      reiserfs_warning (p_s_sb, "journal-2165: bh->b_count < 0");
+    }
+  }
+  return 0 ;
+}
+
+void reiserfs_update_inode_transaction(struct inode *inode) {
+  struct reiserfs_journal *journal = SB_JOURNAL (inode->i_sb);
+  REISERFS_I(inode)->i_jl = journal->j_current_jl;
+  REISERFS_I(inode)->i_trans_id = journal->j_trans_id ;
+}
+
+/*
+ * returns -1 on error, 0 if no commits/barriers were done and 1
+ * if a transaction was actually committed and the barrier was done
+ */
+static int __commit_trans_jl(struct inode *inode, unsigned long id,
+                                 struct reiserfs_journal_list *jl)
+{
+    struct reiserfs_transaction_handle th ;
+    struct super_block *sb = inode->i_sb ;
+    struct reiserfs_journal *journal = SB_JOURNAL (sb);
+    int ret = 0;
+
+    /* is it from the current transaction, or from an unknown transaction? */
+    if (id == journal->j_trans_id) {
+        jl = journal->j_current_jl;
+        /* try to let other writers come in and grow this transaction */
+        let_transaction_grow(sb, id);
+        if (journal->j_trans_id != id) {
+            goto flush_commit_only;
+        }
+
+        ret = journal_begin(&th, sb, 1) ;
+        if (ret)
+            return ret;
+
+        /* someone might have ended this transaction while we joined */
+        if (journal->j_trans_id != id) {
+            reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 1) ;
+            journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)) ;
+            ret = journal_end(&th, sb, 1) ;
+            goto flush_commit_only;
+        }
+
+        ret = journal_end_sync(&th, sb, 1) ;
+        if (!ret)
+            ret = 1;
+
+    } else {
+        /* this gets tricky, we have to make sure the journal list in
+         * the inode still exists.  We know the list is still around
+         * if we've got a larger transaction id than the oldest list
+         */
+flush_commit_only:
+        if (journal_list_still_alive(inode->i_sb, id)) {
+            /*
+             * we only set ret to 1 when we know for sure
+             * the barrier hasn't been started yet on the commit
+             * block.
+             */
+            if (atomic_read(&jl->j_commit_left) > 1)
+                ret = 1;
+            flush_commit_list(sb, jl, 1) ;
+            if (journal->j_errno)
+                ret = journal->j_errno;
+        }
+    }
+    /* otherwise the list is gone, and long since committed */
+    return ret;
+}
+
+int reiserfs_commit_for_inode(struct inode *inode) {
+    unsigned long id = REISERFS_I(inode)->i_trans_id;
+    struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
+
+    /* for the whole inode, assume unset id means it was
+     * changed in the current transaction.  More conservative
+     */
+    if (!id || !jl) {
+        reiserfs_update_inode_transaction(inode) ;
+        id = REISERFS_I(inode)->i_trans_id;
+        /* jl will be updated in __commit_trans_jl */
+    }
+
+   return __commit_trans_jl(inode, id, jl);
+}
+
+void reiserfs_restore_prepared_buffer(struct super_block *p_s_sb, 
+                                      struct buffer_head *bh) {
+    struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+    PROC_INFO_INC( p_s_sb, journal.restore_prepared );
+    if (!bh) {
+        return ;
+    }
+    if (test_clear_buffer_journal_restore_dirty (bh) &&
+        buffer_journal_dirty(bh)) {
+        struct reiserfs_journal_cnode *cn;
+        cn = get_journal_hash_dev(p_s_sb,
+                                  journal->j_list_hash_table,
+                                  bh->b_blocknr);
+        if (cn && can_dirty(cn)) {
+            set_buffer_journal_test (bh);
+            mark_buffer_dirty(bh);
+        }
+    }
+    clear_buffer_journal_prepared (bh);
+}
+
+extern struct tree_balance *cur_tb ;
+/*
+** before we can change a metadata block, we have to make sure it won't
+** be written to disk while we are altering it.  So, we must:
+** clean it
+** wait on it.
+** 
+*/
+int reiserfs_prepare_for_journal(struct super_block *p_s_sb,
+                                  struct buffer_head *bh, int wait) {
+  PROC_INFO_INC( p_s_sb, journal.prepare );
+
+    if (test_set_buffer_locked(bh)) {
+        if (!wait)
+            return 0;
+        lock_buffer(bh);
+    }
+    set_buffer_journal_prepared (bh);
+    if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh))  {
+        clear_buffer_journal_test (bh);
+        set_buffer_journal_restore_dirty (bh);
+    }
+    unlock_buffer(bh);
+    return 1;
+}
+
+static void flush_old_journal_lists(struct super_block *s) {
+    struct reiserfs_journal *journal = SB_JOURNAL (s);
+    struct reiserfs_journal_list *jl;
+    struct list_head *entry;
+    time_t now = get_seconds();
+
+    while(!list_empty(&journal->j_journal_list)) {
+        entry = journal->j_journal_list.next;
+        jl = JOURNAL_LIST_ENTRY(entry);
+        /* this check should always be run, to send old lists to disk */
+        if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4))) {
+            flush_used_journal_lists(s, jl);
+        } else {
+            break;
+        }
+    }
+}
+
+/* 
+** long and ugly.  If flush, will not return until all commit
+** blocks and all real buffers in the trans are on disk.
+** If no_async, won't return until all commit blocks are on disk.
+**
+** keep reading, there are comments as you go along
+**
+** If the journal is aborted, we just clean up. Things like flushing
+** journal lists, etc just won't happen.
+*/
+static int do_journal_end(struct reiserfs_transaction_handle *th, struct super_block  * p_s_sb, unsigned long nblocks, 
+                          int flags) {
+  struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb);
+  struct reiserfs_journal_cnode *cn, *next, *jl_cn; 
+  struct reiserfs_journal_cnode *last_cn = NULL;
+  struct reiserfs_journal_desc *desc ; 
+  struct reiserfs_journal_commit *commit ; 
+  struct buffer_head *c_bh ; /* commit bh */
+  struct buffer_head *d_bh ; /* desc bh */
+  int cur_write_start = 0 ; /* start index of current log write */
+  int old_start ;
+  int i ;
+  int flush = flags & FLUSH_ALL ;
+  int wait_on_commit = flags & WAIT ;
+  struct reiserfs_journal_list *jl, *temp_jl;
+  struct list_head *entry, *safe;
+  unsigned long jindex;
+  unsigned long commit_trans_id;
+  int trans_half;
+
+  BUG_ON (th->t_refcount > 1);
+  BUG_ON (!th->t_trans_id);
+
+  current->journal_info = th->t_handle_save;
+  reiserfs_check_lock_depth(p_s_sb, "journal end");
+  if (journal->j_len == 0) {
+      reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ;
+      journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ;
+  }
+
+  lock_journal(p_s_sb) ;
+  if (journal->j_next_full_flush) {
+    flags |= FLUSH_ALL ;
+    flush = 1 ;
+  }
+  if (journal->j_next_async_flush) {
+    flags |= COMMIT_NOW | WAIT;
+    wait_on_commit = 1;
+  }
+
+  /* check_journal_end locks the journal, and unlocks if it does not return 1 
+  ** it tells us if we should continue with the journal_end, or just return
+  */
+  if (!check_journal_end(th, p_s_sb, nblocks, flags)) {
+    p_s_sb->s_dirt = 1;
+    wake_queued_writers(p_s_sb);
+    reiserfs_async_progress_wait(p_s_sb);
+    goto out ;
+  }
+
+  /* check_journal_end might set these, check again */
+  if (journal->j_next_full_flush) {
+    flush = 1 ;
+  }
+
+  /*
+  ** j must wait means we have to flush the log blocks, and the real blocks for
+  ** this transaction
+  */
+  if (journal->j_must_wait > 0) {
+    flush = 1 ;
+  }
+
+#ifdef REISERFS_PREALLOCATE
+  /* quota ops might need to nest, setup the journal_info pointer for them */
+  current->journal_info = th ;
+  reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into
+                                      * the transaction */
+  current->journal_info = th->t_handle_save ;
+#endif
+  
+  /* setup description block */
+  d_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start) ;
+  set_buffer_uptodate(d_bh);
+  desc = (struct reiserfs_journal_desc *)(d_bh)->b_data ;
+  memset(d_bh->b_data, 0, d_bh->b_size) ;
+  memcpy(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8) ;
+  set_desc_trans_id(desc, journal->j_trans_id) ;
+
+  /* setup commit block.  Don't write (keep it clean too) this one until after everyone else is written */
+  c_bh =  journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 
+                 ((journal->j_start + journal->j_len + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ;
+  commit = (struct reiserfs_journal_commit *)c_bh->b_data ;
+  memset(c_bh->b_data, 0, c_bh->b_size) ;
+  set_commit_trans_id(commit, journal->j_trans_id) ;
+  set_buffer_uptodate(c_bh) ;
+
+  /* init this journal list */
+  jl = journal->j_current_jl;
+
+  /* we lock the commit before doing anything because
+   * we want to make sure nobody tries to run flush_commit_list until
+   * the new transaction is fully setup, and we've already flushed the
+   * ordered bh list
+   */
+  down(&jl->j_commit_lock);
+
+  /* save the transaction id in case we need to commit it later */
+  commit_trans_id = jl->j_trans_id;
+
+  atomic_set(&jl->j_older_commits_done, 0) ;
+  jl->j_trans_id = journal->j_trans_id ;
+  jl->j_timestamp = journal->j_trans_start_time ;
+  jl->j_commit_bh = c_bh ;
+  jl->j_start = journal->j_start ;
+  jl->j_len = journal->j_len ;
+  atomic_set(&jl->j_nonzerolen, journal->j_len) ;
+  atomic_set(&jl->j_commit_left, journal->j_len + 2);
+  jl->j_realblock = NULL ;
+
+  /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
+  **  for each real block, add it to the journal list hash,
+  ** copy into real block index array in the commit or desc block
+  */
+  trans_half = journal_trans_half(p_s_sb->s_blocksize);
+  for (i = 0, cn = journal->j_first ; cn ; cn = cn->next, i++) {
+    if (buffer_journaled (cn->bh)) {
+      jl_cn = get_cnode(p_s_sb) ;
+      if (!jl_cn) {
+        reiserfs_panic(p_s_sb, "journal-1676, get_cnode returned NULL\n") ;
+      }
+      if (i == 0) {
+        jl->j_realblock = jl_cn ;
+      }
+      jl_cn->prev = last_cn ;
+      jl_cn->next = NULL ;
+      if (last_cn) {
+        last_cn->next = jl_cn ;
+      }
+      last_cn = jl_cn ;
+      /* make sure the block we are trying to log is not a block 
+         of journal or reserved area */
+
+      if (is_block_in_log_or_reserved_area(p_s_sb, cn->bh->b_blocknr)) {
+        reiserfs_panic(p_s_sb, "journal-2332: Trying to log block %lu, which is a log block\n", cn->bh->b_blocknr) ;
+      }
+      jl_cn->blocknr = cn->bh->b_blocknr ; 
+      jl_cn->state = 0 ;
+      jl_cn->sb = p_s_sb;
+      jl_cn->bh = cn->bh ;
+      jl_cn->jlist = jl;
+      insert_journal_hash(journal->j_list_hash_table, jl_cn) ;
+      if (i < trans_half) {
+        desc->j_realblock[i] = cpu_to_le32(cn->bh->b_blocknr) ;
+      } else {
+        commit->j_realblock[i - trans_half] = cpu_to_le32(cn->bh->b_blocknr) ;
+      }
+    } else {
+      i-- ;
+    }
+  }
+  set_desc_trans_len(desc, journal->j_len) ;
+  set_desc_mount_id(desc, journal->j_mount_id) ;
+  set_desc_trans_id(desc, journal->j_trans_id) ;
+  set_commit_trans_len(commit, journal->j_len);
+
+  /* special check in case all buffers in the journal were marked for not logging */
+  if (journal->j_len == 0) {
+    BUG();
+  }
+
+  /* we're about to dirty all the log blocks, mark the description block
+   * dirty now too.  Don't mark the commit block dirty until all the
+   * others are on disk
+   */
+  mark_buffer_dirty(d_bh);
+
+  /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
+  cur_write_start = journal->j_start ;
+  cn = journal->j_first ;
+  jindex = 1 ; /* start at one so we don't get the desc again */
+  while(cn) {
+    clear_buffer_journal_new (cn->bh);
+    /* copy all the real blocks into log area.  dirty log blocks */
+    if (buffer_journaled (cn->bh)) {
+      struct buffer_head *tmp_bh ;
+      char *addr;
+      struct page *page;
+      tmp_bh =  journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + 
+                       ((cur_write_start + jindex) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ;
+      set_buffer_uptodate(tmp_bh);
+      page = cn->bh->b_page;
+      addr = kmap(page);
+      memcpy(tmp_bh->b_data, addr + offset_in_page(cn->bh->b_data),
+             cn->bh->b_size);
+      kunmap(page);
+      mark_buffer_dirty(tmp_bh);
+      jindex++ ;
+      set_buffer_journal_dirty (cn->bh);
+      clear_buffer_journaled (cn->bh);
+    } else {
+      /* JDirty cleared sometime during transaction.  don't log this one */
+      reiserfs_warning(p_s_sb, "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!") ;
+      brelse(cn->bh) ;
+    }
+    next = cn->next ;
+    free_cnode(p_s_sb, cn) ;
+    cn = next ;
+    cond_resched();
+  }
+
+  /* we are done  with both the c_bh and d_bh, but
+  ** c_bh must be written after all other commit blocks,
+  ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
+  */
+
+  journal->j_current_jl = alloc_journal_list(p_s_sb);
+
+  /* now it is safe to insert this transaction on the main list */
+  list_add_tail(&jl->j_list, &journal->j_journal_list);
+  list_add_tail(&jl->j_working_list, &journal->j_working_list);
+  journal->j_num_work_lists++;
+
+  /* reset journal values for the next transaction */
+  old_start = journal->j_start ;
+  journal->j_start = (journal->j_start + journal->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb);
+  atomic_set(&(journal->j_wcount), 0) ;
+  journal->j_bcount = 0 ;
+  journal->j_last = NULL ;
+  journal->j_first = NULL ;
+  journal->j_len = 0 ;
+  journal->j_trans_start_time = 0 ;
+  journal->j_trans_id++ ;
+  journal->j_current_jl->j_trans_id = journal->j_trans_id;
+  journal->j_must_wait = 0 ;
+  journal->j_len_alloc = 0 ;
+  journal->j_next_full_flush = 0 ;
+  journal->j_next_async_flush = 0 ;
+  init_journal_hash(p_s_sb) ; 
+
+  // make sure reiserfs_add_jh sees the new current_jl before we
+  // write out the tails
+  smp_mb();
+
+  /* tail conversion targets have to hit the disk before we end the
+   * transaction.  Otherwise a later transaction might repack the tail
+   * before this transaction commits, leaving the data block unflushed and
+   * clean, if we crash before the later transaction commits, the data block
+   * is lost.
+   */
+  if (!list_empty(&jl->j_tail_bh_list)) {
+      unlock_kernel();
+      write_ordered_buffers(&journal->j_dirty_buffers_lock,
+                            journal, jl, &jl->j_tail_bh_list);
+      lock_kernel();
+  }
+  if (!list_empty(&jl->j_tail_bh_list))
+      BUG();
+  up(&jl->j_commit_lock);
+
+  /* honor the flush wishes from the caller, simple commits can
+  ** be done outside the journal lock, they are done below
+  **
+  ** if we don't flush the commit list right now, we put it into
+  ** the work queue so the people waiting on the async progress work
+  ** queue don't wait for this proc to flush journal lists and such.
+  */
+  if (flush) {
+    flush_commit_list(p_s_sb, jl, 1) ;
+    flush_journal_list(p_s_sb, jl, 1) ;
+  } else if (!(jl->j_state & LIST_COMMIT_PENDING))
+    queue_delayed_work(commit_wq, &journal->j_work, HZ/10);
+
+
+  /* if the next transaction has any chance of wrapping, flush 
+  ** transactions that might get overwritten.  If any journal lists are very 
+  ** old flush them as well.  
+  */
+first_jl:
+  list_for_each_safe(entry, safe, &journal->j_journal_list) {
+    temp_jl = JOURNAL_LIST_ENTRY(entry);
+    if (journal->j_start <= temp_jl->j_start) {
+      if ((journal->j_start + journal->j_trans_max + 1) >=
+          temp_jl->j_start)
+      {
+        flush_used_journal_lists(p_s_sb, temp_jl);
+        goto first_jl;
+      } else if ((journal->j_start +
+                  journal->j_trans_max + 1) <
+                  SB_ONDISK_JOURNAL_SIZE(p_s_sb))
+      {
+          /* if we don't cross into the next transaction and we don't
+           * wrap, there is no way we can overlap any later transactions
+           * break now
+           */
+          break;
+      }
+    } else if ((journal->j_start +
+                journal->j_trans_max + 1) >
+                SB_ONDISK_JOURNAL_SIZE(p_s_sb))
+    {
+      if (((journal->j_start + journal->j_trans_max + 1) %
+            SB_ONDISK_JOURNAL_SIZE(p_s_sb)) >= temp_jl->j_start)
+      {
+        flush_used_journal_lists(p_s_sb, temp_jl);
+        goto first_jl;
+      } else {
+          /* we don't overlap anything from out start to the end of the
+           * log, and our wrapped portion doesn't overlap anything at
+           * the start of the log.  We can break
+           */
+          break;
+      }
+    }
+  }
+  flush_old_journal_lists(p_s_sb);
+
+  journal->j_current_jl->j_list_bitmap = get_list_bitmap(p_s_sb, journal->j_current_jl) ;
+
+  if (!(journal->j_current_jl->j_list_bitmap)) {
+    reiserfs_panic(p_s_sb, "journal-1996: do_journal_end, could not get a list bitmap\n") ;
+  }
+
+  atomic_set(&(journal->j_jlock), 0) ;
+  unlock_journal(p_s_sb) ;
+  /* wake up any body waiting to join. */
+  clear_bit(J_WRITERS_QUEUED, &journal->j_state);
+  wake_up(&(journal->j_join_wait)) ;
+
+  if (!flush && wait_on_commit &&
+      journal_list_still_alive(p_s_sb, commit_trans_id)) {
+          flush_commit_list(p_s_sb, jl, 1) ;
+  }
+out:
+  reiserfs_check_lock_depth(p_s_sb, "journal end2");
+
+  memset (th, 0, sizeof (*th));
+  /* Re-set th->t_super, so we can properly keep track of how many
+   * persistent transactions there are. We need to do this so if this
+   * call is part of a failed restart_transaction, we can free it later */
+  th->t_super = p_s_sb;
+
+  return journal->j_errno;
+}
+
+static void
+__reiserfs_journal_abort_hard (struct super_block *sb)
+{
+    struct reiserfs_journal *journal = SB_JOURNAL (sb);
+    if (test_bit (J_ABORTED, &journal->j_state))
+        return;
+
+    printk (KERN_CRIT "REISERFS: Aborting journal for filesystem on %s\n",
+                      reiserfs_bdevname (sb));
+
+    sb->s_flags |= MS_RDONLY;
+    set_bit (J_ABORTED, &journal->j_state);
+
+#ifdef CONFIG_REISERFS_CHECK
+    dump_stack();
+#endif
+}
+
+static void
+__reiserfs_journal_abort_soft (struct super_block *sb, int errno)
+{
+    struct reiserfs_journal *journal = SB_JOURNAL (sb);
+    if (test_bit (J_ABORTED, &journal->j_state))
+        return;
+
+    if (!journal->j_errno)
+        journal->j_errno = errno;
+
+    __reiserfs_journal_abort_hard (sb);
+}
+
+void
+reiserfs_journal_abort (struct super_block *sb, int errno)
+{
+    return __reiserfs_journal_abort_soft (sb, errno);
+}