Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2846 insertions, 0 deletions

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
new file mode 100644
index 000000000000..7543031396f4
--- /dev/null
+++ b/fs/reiserfs/inode.c
@@ -0,0 +1,2846 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/config.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
+#include <linux/highmem.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+#include <linux/buffer_head.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/quotaops.h>
+
+extern int reiserfs_default_io_size; /* default io size devuned in super.c */
+
+static int reiserfs_commit_write(struct file *f, struct page *page,
+                                 unsigned from, unsigned to);
+static int reiserfs_prepare_write(struct file *f, struct page *page,
+				  unsigned from, unsigned to);
+
+void reiserfs_delete_inode (struct inode * inode)
+{
+    /* We need blocks for transaction + (user+group) quota update (possibly delete) */
+    int jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2 * REISERFS_QUOTA_INIT_BLOCKS;
+    struct reiserfs_transaction_handle th ;
+  
+    reiserfs_write_lock(inode->i_sb);
+
+    /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
+    if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) { /* also handles bad_inode case */
+	down (&inode->i_sem); 
+
+	reiserfs_delete_xattrs (inode);
+
+	if (journal_begin(&th, inode->i_sb, jbegin_count)) {
+	    up (&inode->i_sem);
+	    goto out;
+	}
+	reiserfs_update_inode_transaction(inode) ;
+
+	if (reiserfs_delete_object (&th, inode)) {
+	    up (&inode->i_sem);
+	    goto out;
+	}
+
+	/* Do quota update inside a transaction for journaled quotas. We must do that
+	 * after delete_object so that quota updates go into the same transaction as
+	 * stat data deletion */
+	DQUOT_FREE_INODE(inode);
+
+	if (journal_end(&th, inode->i_sb, jbegin_count)) {
+	    up (&inode->i_sem);
+	    goto out;
+	}
+
+        up (&inode->i_sem);
+
+        /* all items of file are deleted, so we can remove "save" link */
+	remove_save_link (inode, 0/* not truncate */); /* we can't do anything
+                                                        * about an error here */
+    } else {
+	/* no object items are in the tree */
+	;
+    }
+out:
+    clear_inode (inode); /* note this must go after the journal_end to prevent deadlock */
+    inode->i_blocks = 0;
+    reiserfs_write_unlock(inode->i_sb);
+}
+
+static void _make_cpu_key (struct cpu_key * key, int version, __u32 dirid, __u32 objectid, 
+	       loff_t offset, int type, int length )
+{
+    key->version = version;
+
+    key->on_disk_key.k_dir_id = dirid;
+    key->on_disk_key.k_objectid = objectid;
+    set_cpu_key_k_offset (key, offset);
+    set_cpu_key_k_type (key, type);  
+    key->key_length = length;
+}
+
+
+/* take base of inode_key (it comes from inode always) (dirid, objectid) and version from an inode, set
+   offset and type of key */
+void make_cpu_key (struct cpu_key * key, struct inode * inode, loff_t offset,
+	      int type, int length )
+{
+  _make_cpu_key (key, get_inode_item_key_version (inode), le32_to_cpu (INODE_PKEY (inode)->k_dir_id),
+		 le32_to_cpu (INODE_PKEY (inode)->k_objectid), 
+		 offset, type, length);
+}
+
+
+//
+// when key is 0, do not set version and short key
+//
+inline void make_le_item_head (struct item_head * ih, const struct cpu_key * key,
+			       int version,
+			       loff_t offset, int type, int length, 
+			       int entry_count/*or ih_free_space*/)
+{
+    if (key) {
+	ih->ih_key.k_dir_id = cpu_to_le32 (key->on_disk_key.k_dir_id);
+	ih->ih_key.k_objectid = cpu_to_le32 (key->on_disk_key.k_objectid);
+    }
+    put_ih_version( ih, version );
+    set_le_ih_k_offset (ih, offset);
+    set_le_ih_k_type (ih, type);
+    put_ih_item_len( ih, length );
+    /*    set_ih_free_space (ih, 0);*/
+    // for directory items it is entry count, for directs and stat
+    // datas - 0xffff, for indirects - 0
+    put_ih_entry_count( ih, entry_count );
+}
+
+//
+// FIXME: we might cache recently accessed indirect item
+
+// Ugh.  Not too eager for that....
+//  I cut the code until such time as I see a convincing argument (benchmark).
+// I don't want a bloated inode struct..., and I don't like code complexity....
+
+/* cutting the code is fine, since it really isn't in use yet and is easy
+** to add back in.  But, Vladimir has a really good idea here.  Think
+** about what happens for reading a file.  For each page,
+** The VFS layer calls reiserfs_readpage, who searches the tree to find
+** an indirect item.  This indirect item has X number of pointers, where
+** X is a big number if we've done the block allocation right.  But,
+** we only use one or two of these pointers during each call to readpage,
+** needlessly researching again later on.
+**
+** The size of the cache could be dynamic based on the size of the file.
+**
+** I'd also like to see us cache the location the stat data item, since
+** we are needlessly researching for that frequently.
+**
+** --chris
+*/
+
+/* If this page has a file tail in it, and
+** it was read in by get_block_create_0, the page data is valid,
+** but tail is still sitting in a direct item, and we can't write to
+** it.  So, look through this page, and check all the mapped buffers
+** to make sure they have valid block numbers.  Any that don't need
+** to be unmapped, so that block_prepare_write will correctly call
+** reiserfs_get_block to convert the tail into an unformatted node
+*/
+static inline void fix_tail_page_for_writing(struct page *page) {
+    struct buffer_head *head, *next, *bh ;
+
+    if (page && page_has_buffers(page)) {
+	head = page_buffers(page) ;
+	bh = head ;
+	do {
+	    next = bh->b_this_page ;
+	    if (buffer_mapped(bh) && bh->b_blocknr == 0) {
+	        reiserfs_unmap_buffer(bh) ;
+	    }
+	    bh = next ;
+	} while (bh != head) ;
+    }
+}
+
+/* reiserfs_get_block does not need to allocate a block only if it has been
+   done already or non-hole position has been found in the indirect item */
+static inline int allocation_needed (int retval, b_blocknr_t allocated, 
+				     struct item_head * ih,
+				     __u32 * item, int pos_in_item)
+{
+  if (allocated)
+	 return 0;
+  if (retval == POSITION_FOUND && is_indirect_le_ih (ih) && 
+      get_block_num(item, pos_in_item))
+	 return 0;
+  return 1;
+}
+
+static inline int indirect_item_found (int retval, struct item_head * ih)
+{
+  return (retval == POSITION_FOUND) && is_indirect_le_ih (ih);
+}
+
+
+static inline void set_block_dev_mapped (struct buffer_head * bh, 
+					 b_blocknr_t block, struct inode * inode)
+{
+	map_bh(bh, inode->i_sb, block);
+}
+
+
+//
+// files which were created in the earlier version can not be longer,
+// than 2 gb
+//
+static int file_capable (struct inode * inode, long block)
+{
+    if (get_inode_item_key_version (inode) != KEY_FORMAT_3_5 || // it is new file.
+	block < (1 << (31 - inode->i_sb->s_blocksize_bits))) // old file, but 'block' is inside of 2gb
+	return 1;
+
+    return 0;
+}
+
+/*static*/ int restart_transaction(struct reiserfs_transaction_handle *th,
+				struct inode *inode, struct path *path) {
+  struct super_block *s = th->t_super ;
+  int len = th->t_blocks_allocated ;
+  int err;
+
+  BUG_ON (!th->t_trans_id);
+  BUG_ON (!th->t_refcount);
+
+  /* we cannot restart while nested */
+  if (th->t_refcount > 1) {
+      return 0  ;
+  }
+  pathrelse(path) ;
+  reiserfs_update_sd(th, inode) ;
+  err = journal_end(th, s, len) ;
+  if (!err) {
+      err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6) ;
+      if (!err)
+        reiserfs_update_inode_transaction(inode) ;
+  }
+  return err;
+}
+
+// it is called by get_block when create == 0. Returns block number
+// for 'block'-th logical block of file. When it hits direct item it
+// returns 0 (being called from bmap) or read direct item into piece
+// of page (bh_result)
+
+// Please improve the english/clarity in the comment above, as it is
+// hard to understand.
+
+static int _get_block_create_0 (struct inode * inode, long block,
+				 struct buffer_head * bh_result,
+				 int args)
+{
+    INITIALIZE_PATH (path);
+    struct cpu_key key;
+    struct buffer_head * bh;
+    struct item_head * ih, tmp_ih;
+    int fs_gen ;
+    int blocknr;
+    char * p = NULL;
+    int chars;
+    int ret ;
+    int done = 0 ;
+    unsigned long offset ;
+
+    // prepare the key to look for the 'block'-th block of file
+    make_cpu_key (&key, inode,
+		  (loff_t)block * inode->i_sb->s_blocksize + 1, TYPE_ANY, 3);
+
+research:
+    if (search_for_position_by_key (inode->i_sb, &key, &path) != POSITION_FOUND) {
+	pathrelse (&path);
+        if (p)
+            kunmap(bh_result->b_page) ;
+	// We do not return -ENOENT if there is a hole but page is uptodate, because it means
+	// That there is some MMAPED data associated with it that is yet to be written to disk.
+	if ((args & GET_BLOCK_NO_HOLE) && !PageUptodate(bh_result->b_page) ) {
+	    return -ENOENT ;
+	}
+        return 0 ;
+    }
+    
+    //
+    bh = get_last_bh (&path);
+    ih = get_ih (&path);
+    if (is_indirect_le_ih (ih)) {
+	__u32 * ind_item = (__u32 *)B_I_PITEM (bh, ih);
+	
+	/* FIXME: here we could cache indirect item or part of it in
+	   the inode to avoid search_by_key in case of subsequent
+	   access to file */
+	blocknr = get_block_num(ind_item, path.pos_in_item) ;
+	ret = 0 ;
+	if (blocknr) {
+	    map_bh(bh_result, inode->i_sb, blocknr);
+	    if (path.pos_in_item == ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) {
+		set_buffer_boundary(bh_result);
+	    }
+	} else 
+	    // We do not return -ENOENT if there is a hole but page is uptodate, because it means
+	    // That there is some MMAPED data associated with it that is yet to  be written to disk.
+	    if ((args & GET_BLOCK_NO_HOLE) && !PageUptodate(bh_result->b_page) ) {
+	    ret = -ENOENT ;
+	    }
+
+	pathrelse (&path);
+        if (p)
+            kunmap(bh_result->b_page) ;
+	return ret ;
+    }
+
+    // requested data are in direct item(s)
+    if (!(args & GET_BLOCK_READ_DIRECT)) {
+	// we are called by bmap. FIXME: we can not map block of file
+	// when it is stored in direct item(s)
+	pathrelse (&path);	
+        if (p)
+            kunmap(bh_result->b_page) ;
+	return -ENOENT;
+    }
+
+    /* if we've got a direct item, and the buffer or page was uptodate,
+    ** we don't want to pull data off disk again.  skip to the
+    ** end, where we map the buffer and return
+    */
+    if (buffer_uptodate(bh_result)) {
+        goto finished ;
+    } else 
+	/*
+	** grab_tail_page can trigger calls to reiserfs_get_block on up to date
+	** pages without any buffers.  If the page is up to date, we don't want
+	** read old data off disk.  Set the up to date bit on the buffer instead
+	** and jump to the end
+	*/
+	    if (!bh_result->b_page || PageUptodate(bh_result->b_page)) {
+		set_buffer_uptodate(bh_result);
+		goto finished ;
+    }
+
+    // read file tail into part of page
+    offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1) ;
+    fs_gen = get_generation(inode->i_sb) ;
+    copy_item_head (&tmp_ih, ih);
+
+    /* we only want to kmap if we are reading the tail into the page.
+    ** this is not the common case, so we don't kmap until we are
+    ** sure we need to.  But, this means the item might move if
+    ** kmap schedules
+    */
+    if (!p) {
+	p = (char *)kmap(bh_result->b_page) ;
+	if (fs_changed (fs_gen, inode->i_sb) && item_moved (&tmp_ih, &path)) {
+	    goto research;
+	}
+    }
+    p += offset ;
+    memset (p, 0, inode->i_sb->s_blocksize);
+    do {
+	if (!is_direct_le_ih (ih)) {
+	    BUG ();
+        }
+	/* make sure we don't read more bytes than actually exist in
+	** the file.  This can happen in odd cases where i_size isn't
+	** correct, and when direct item padding results in a few 
+	** extra bytes at the end of the direct item
+	*/
+        if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size)
+	    break ;
+	if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) {
+	    chars = inode->i_size - (le_ih_k_offset(ih) - 1) - path.pos_in_item;
+	    done = 1 ;
+	} else {
+	    chars = ih_item_len(ih) - path.pos_in_item;
+	}
+	memcpy (p, B_I_PITEM (bh, ih) + path.pos_in_item, chars);
+
+	if (done) 
+	    break ;
+
+	p += chars;
+
+	if (PATH_LAST_POSITION (&path) != (B_NR_ITEMS (bh) - 1))
+	    // we done, if read direct item is not the last item of
+	    // node FIXME: we could try to check right delimiting key
+	    // to see whether direct item continues in the right
+	    // neighbor or rely on i_size
+	    break;
+
+	// update key to look for the next piece
+	set_cpu_key_k_offset (&key, cpu_key_k_offset (&key) + chars);
+	if (search_for_position_by_key (inode->i_sb, &key, &path) != POSITION_FOUND)
+	    // we read something from tail, even if now we got IO_ERROR
+	    break;
+	bh = get_last_bh (&path);
+	ih = get_ih (&path);
+    } while (1);
+
+    flush_dcache_page(bh_result->b_page) ;
+    kunmap(bh_result->b_page) ;
+
+finished:
+    pathrelse (&path);
+    /* this buffer has valid data, but isn't valid for io.  mapping it to
+     * block #0 tells the rest of reiserfs it just has a tail in it
+     */
+    map_bh(bh_result, inode->i_sb, 0);
+    set_buffer_uptodate (bh_result);
+    return 0;
+}
+
+
+// this is called to create file map. So, _get_block_create_0 will not
+// read direct item
+static int reiserfs_bmap (struct inode * inode, sector_t block,
+			  struct buffer_head * bh_result, int create)
+{
+    if (!file_capable (inode, block))
+	return -EFBIG;
+
+    reiserfs_write_lock(inode->i_sb);
+    /* do not read the direct item */
+    _get_block_create_0 (inode, block, bh_result, 0) ;
+    reiserfs_write_unlock(inode->i_sb);
+    return 0;
+}
+
+/* special version of get_block that is only used by grab_tail_page right
+** now.  It is sent to block_prepare_write, and when you try to get a
+** block past the end of the file (or a block from a hole) it returns
+** -ENOENT instead of a valid buffer.  block_prepare_write expects to
+** be able to do i/o on the buffers returned, unless an error value
+** is also returned.
+** 
+** So, this allows block_prepare_write to be used for reading a single block
+** in a page.  Where it does not produce a valid page for holes, or past the
+** end of the file.  This turns out to be exactly what we need for reading
+** tails for conversion.
+**
+** The point of the wrapper is forcing a certain value for create, even
+** though the VFS layer is calling this function with create==1.  If you 
+** don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block, 
+** don't use this function.
+*/
+static int reiserfs_get_block_create_0 (struct inode * inode, sector_t block,
+			struct buffer_head * bh_result, int create) {
+    return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE) ;
+}
+
+/* This is special helper for reiserfs_get_block in case we are executing
+   direct_IO request. */
+static int reiserfs_get_blocks_direct_io(struct inode *inode,
+					 sector_t iblock,
+					 unsigned long max_blocks,
+					 struct buffer_head *bh_result,
+					 int create)
+{
+    int ret ;
+
+    bh_result->b_page = NULL;
+
+    /* We set the b_size before reiserfs_get_block call since it is
+       referenced in convert_tail_for_hole() that may be called from
+       reiserfs_get_block() */
+    bh_result->b_size = (1 << inode->i_blkbits);
+
+    ret = reiserfs_get_block(inode, iblock, bh_result,
+                             create | GET_BLOCK_NO_DANGLE) ;
+    if (ret)
+        goto out;
+
+    /* don't allow direct io onto tail pages */
+    if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
+        /* make sure future calls to the direct io funcs for this offset
+        ** in the file fail by unmapping the buffer
+        */
+        clear_buffer_mapped(bh_result);
+        ret = -EINVAL ;
+    }
+    /* Possible unpacked tail. Flush the data before pages have
+       disappeared */
+    if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) {
+        int err;
+        lock_kernel();
+        err = reiserfs_commit_for_inode(inode);
+        REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+        unlock_kernel();
+        if (err < 0)
+            ret = err;
+    }
+out:
+    return ret ;
+}
+
+
+/*
+** helper function for when reiserfs_get_block is called for a hole
+** but the file tail is still in a direct item
+** bh_result is the buffer head for the hole
+** tail_offset is the offset of the start of the tail in the file
+**
+** This calls prepare_write, which will start a new transaction
+** you should not be in a transaction, or have any paths held when you
+** call this.
+*/
+static int convert_tail_for_hole(struct inode *inode, 
+                                 struct buffer_head *bh_result,
+				 loff_t tail_offset) {
+    unsigned long index ;
+    unsigned long tail_end ; 
+    unsigned long tail_start ;
+    struct page * tail_page ;
+    struct page * hole_page = bh_result->b_page ;
+    int retval = 0 ;
+
+    if ((tail_offset & (bh_result->b_size - 1)) != 1) 
+        return -EIO ;
+
+    /* always try to read until the end of the block */
+    tail_start = tail_offset & (PAGE_CACHE_SIZE - 1) ;
+    tail_end = (tail_start | (bh_result->b_size - 1)) + 1 ;
+
+    index = tail_offset >> PAGE_CACHE_SHIFT ;
+    /* hole_page can be zero in case of direct_io, we are sure
+       that we cannot get here if we write with O_DIRECT into
+       tail page */
+    if (!hole_page || index != hole_page->index) {
+	tail_page = grab_cache_page(inode->i_mapping, index) ;
+	retval = -ENOMEM;
+	if (!tail_page) {
+	    goto out ;
+	}
+    } else {
+        tail_page = hole_page ;
+    }
+
+    /* we don't have to make sure the conversion did not happen while
+    ** we were locking the page because anyone that could convert
+    ** must first take i_sem.
+    **
+    ** We must fix the tail page for writing because it might have buffers
+    ** that are mapped, but have a block number of 0.  This indicates tail
+    ** data that has been read directly into the page, and block_prepare_write
+    ** won't trigger a get_block in this case.
+    */
+    fix_tail_page_for_writing(tail_page) ;
+    retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end);
+    if (retval)
+        goto unlock ;
+
+    /* tail conversion might change the data in the page */
+    flush_dcache_page(tail_page) ;
+
+    retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end) ;
+
+unlock:
+    if (tail_page != hole_page) {
+        unlock_page(tail_page) ;
+	page_cache_release(tail_page) ;
+    }
+out:
+    return retval ;
+}
+
+static inline int _allocate_block(struct reiserfs_transaction_handle *th,
+			   long block,
+                           struct inode *inode, 
+			   b_blocknr_t *allocated_block_nr, 
+			   struct path * path,
+			   int flags) {
+    BUG_ON (!th->t_trans_id);
+  
+#ifdef REISERFS_PREALLOCATE
+    if (!(flags & GET_BLOCK_NO_ISEM)) {
+	return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr, path, block);
+    }
+#endif
+    return reiserfs_new_unf_blocknrs (th, inode, allocated_block_nr, path, block);
+}
+
+int reiserfs_get_block (struct inode * inode, sector_t block,
+			struct buffer_head * bh_result, int create)
+{
+    int repeat, retval = 0;
+    b_blocknr_t allocated_block_nr = 0;// b_blocknr_t is (unsigned) 32 bit int
+    INITIALIZE_PATH(path);
+    int pos_in_item;
+    struct cpu_key key;
+    struct buffer_head * bh, * unbh = NULL;
+    struct item_head * ih, tmp_ih;
+    __u32 * item;
+    int done;
+    int fs_gen;
+    struct reiserfs_transaction_handle *th = NULL;
+    /* space reserved in transaction batch: 
+        . 3 balancings in direct->indirect conversion
+        . 1 block involved into reiserfs_update_sd()
+       XXX in practically impossible worst case direct2indirect()
+       can incur (much) more than 3 balancings.
+       quota update for user, group */
+    int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3 + 1 + 2 * REISERFS_QUOTA_TRANS_BLOCKS;
+    int version;
+    int dangle = 1;
+    loff_t new_offset = (((loff_t)block) << inode->i_sb->s_blocksize_bits) + 1 ;
+
+				/* bad.... */
+    reiserfs_write_lock(inode->i_sb);
+    version = get_inode_item_key_version (inode);
+
+    if (block < 0) {
+	reiserfs_write_unlock(inode->i_sb);
+	return -EIO;
+    }
+
+    if (!file_capable (inode, block)) {
+	reiserfs_write_unlock(inode->i_sb);
+	return -EFBIG;
+    }
+
+    /* if !create, we aren't changing the FS, so we don't need to
+    ** log anything, so we don't need to start a transaction
+    */
+    if (!(create & GET_BLOCK_CREATE)) {
+	int ret ;
+	/* find number of block-th logical block of the file */
+	ret = _get_block_create_0 (inode, block, bh_result, 
+	                           create | GET_BLOCK_READ_DIRECT) ;
+	reiserfs_write_unlock(inode->i_sb);
+	return ret;
+    }
+    /*
+     * if we're already in a transaction, make sure to close
+     * any new transactions we start in this func
+     */
+    if ((create & GET_BLOCK_NO_DANGLE) ||
+        reiserfs_transaction_running(inode->i_sb))
+        dangle = 0;
+
+    /* If file is of such a size, that it might have a tail and tails are enabled
+    ** we should mark it as possibly needing tail packing on close
+    */
+    if ( (have_large_tails (inode->i_sb) && inode->i_size < i_block_size (inode)*4) ||
+	 (have_small_tails (inode->i_sb) && inode->i_size < i_block_size(inode)) )
+	REISERFS_I(inode)->i_flags |= i_pack_on_close_mask ;
+
+    /* set the key of the first byte in the 'block'-th block of file */
+    make_cpu_key (&key, inode, new_offset,
+		  TYPE_ANY, 3/*key length*/);
+    if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) {
+start_trans:
+	th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count);
+	if (!th) {
+	    retval = -ENOMEM;
+	    goto failure;
+	}
+	reiserfs_update_inode_transaction(inode) ;
+    }
+ research:
+
+    retval = search_for_position_by_key (inode->i_sb, &key, &path);
+    if (retval == IO_ERROR) {
+	retval = -EIO;
+	goto failure;
+    }
+	
+    bh = get_last_bh (&path);
+    ih = get_ih (&path);
+    item = get_item (&path);
+    pos_in_item = path.pos_in_item;
+
+    fs_gen = get_generation (inode->i_sb);
+    copy_item_head (&tmp_ih, ih);
+
+    if (allocation_needed (retval, allocated_block_nr, ih, item, pos_in_item)) {
+	/* we have to allocate block for the unformatted node */
+	if (!th) {
+	    pathrelse(&path) ;
+	    goto start_trans;
+	}
+
+	repeat = _allocate_block(th, block, inode, &allocated_block_nr, &path, create);
+
+	if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
+	    /* restart the transaction to give the journal a chance to free
+	    ** some blocks.  releases the path, so we have to go back to
+	    ** research if we succeed on the second try
+	    */
+	    SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;
+	    retval = restart_transaction(th, inode, &path) ;
+            if (retval)
+                goto failure;
+	    repeat = _allocate_block(th, block, inode, &allocated_block_nr, NULL, create);
+
+	    if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
+		goto research ;
+	    }
+	    if (repeat == QUOTA_EXCEEDED)
+		retval = -EDQUOT;
+	    else
+		retval = -ENOSPC;
+	    goto failure;
+	}
+
+	if (fs_changed (fs_gen, inode->i_sb) && item_moved (&tmp_ih, &path)) {
+	    goto research;
+	}
+    }
+
+    if (indirect_item_found (retval, ih)) {
+        b_blocknr_t unfm_ptr;
+	/* 'block'-th block is in the file already (there is
+	   corresponding cell in some indirect item). But it may be
+	   zero unformatted node pointer (hole) */
+        unfm_ptr = get_block_num (item, pos_in_item);
+	if (unfm_ptr == 0) {
+	    /* use allocated block to plug the hole */
+	    reiserfs_prepare_for_journal(inode->i_sb, bh, 1) ;
+	    if (fs_changed (fs_gen, inode->i_sb) && item_moved (&tmp_ih, &path)) {
+		reiserfs_restore_prepared_buffer(inode->i_sb, bh) ;
+		goto research;
+	    }
+	    set_buffer_new(bh_result);
+	    if (buffer_dirty(bh_result) && reiserfs_data_ordered(inode->i_sb))
+	    	reiserfs_add_ordered_list(inode, bh_result);
+	    put_block_num(item, pos_in_item, allocated_block_nr) ;
+            unfm_ptr = allocated_block_nr;
+	    journal_mark_dirty (th, inode->i_sb, bh);
+	    reiserfs_update_sd(th, inode) ;
+	}
+	set_block_dev_mapped(bh_result, unfm_ptr, inode);
+	pathrelse (&path);
+        retval = 0;
+	if (!dangle && th)
+	    retval = reiserfs_end_persistent_transaction(th);
+
+	reiserfs_write_unlock(inode->i_sb);
+	 
+	/* the item was found, so new blocks were not added to the file
+	** there is no need to make sure the inode is updated with this 
+	** transaction
+	*/
+	return retval;
+    }
+
+    if (!th) {
+	pathrelse(&path) ;
+	goto start_trans;
+    }
+
+    /* desired position is not found or is in the direct item. We have
+       to append file with holes up to 'block'-th block converting
+       direct items to indirect one if necessary */
+    done = 0;
+    do {
+	if (is_statdata_le_ih (ih)) {
+	    __u32 unp = 0;
+	    struct cpu_key tmp_key;
+
+	    /* indirect item has to be inserted */
+	    make_le_item_head (&tmp_ih, &key, version, 1, TYPE_INDIRECT, 
+			       UNFM_P_SIZE, 0/* free_space */);
+
+	    if (cpu_key_k_offset (&key) == 1) {
+		/* we are going to add 'block'-th block to the file. Use
+		   allocated block for that */
+		unp = cpu_to_le32 (allocated_block_nr);
+		set_block_dev_mapped (bh_result, allocated_block_nr, inode);
+		set_buffer_new(bh_result);
+		done = 1;
+	    }
+	    tmp_key = key; // ;)
+	    set_cpu_key_k_offset (&tmp_key, 1);
+	    PATH_LAST_POSITION(&path) ++;
+
+	    retval = reiserfs_insert_item (th, &path, &tmp_key, &tmp_ih, inode, (char *)&unp);
+	    if (retval) {
+		reiserfs_free_block (th, inode, allocated_block_nr, 1);
+		goto failure; // retval == -ENOSPC, -EDQUOT or -EIO or -EEXIST
+	    }
+	    //mark_tail_converted (inode);
+	} else if (is_direct_le_ih (ih)) {
+	    /* direct item has to be converted */
+	    loff_t tail_offset;
+
+	    tail_offset = ((le_ih_k_offset (ih) - 1) & ~(inode->i_sb->s_blocksize - 1)) + 1;
+	    if (tail_offset == cpu_key_k_offset (&key)) {
+		/* direct item we just found fits into block we have
+                   to map. Convert it into unformatted node: use
+                   bh_result for the conversion */
+		set_block_dev_mapped (bh_result, allocated_block_nr, inode);
+		unbh = bh_result;
+		done = 1;
+	    } else {
+		/* we have to padd file tail stored in direct item(s)
+		   up to block size and convert it to unformatted
+		   node. FIXME: this should also get into page cache */
+
+		pathrelse(&path) ;
+		/*
+		 * ugly, but we can only end the transaction if
+		 * we aren't nested
+		 */
+		BUG_ON (!th->t_refcount);
+		if (th->t_refcount == 1) {
+		    retval = reiserfs_end_persistent_transaction(th);
+		    th = NULL;
+		    if (retval)
+			goto failure;
+		}
+
+		retval = convert_tail_for_hole(inode, bh_result, tail_offset) ;
+		if (retval) {
+		    if ( retval != -ENOSPC )
+			reiserfs_warning (inode->i_sb, "clm-6004: convert tail failed inode %lu, error %d", inode->i_ino, retval) ;
+		    if (allocated_block_nr) {
+			/* the bitmap, the super, and the stat data == 3 */
+			if (!th)
+			    th = reiserfs_persistent_transaction(inode->i_sb,3);
+			if (th)
+			    reiserfs_free_block (th,inode,allocated_block_nr,1);
+		    }
+		    goto failure ;
+		}
+		goto research ;
+	    }
+	    retval = direct2indirect (th, inode, &path, unbh, tail_offset);
+	    if (retval) {
+		reiserfs_unmap_buffer(unbh);
+		reiserfs_free_block (th, inode, allocated_block_nr, 1);
+		goto failure;
+	    }
+	    /* it is important the set_buffer_uptodate is done after
+	    ** the direct2indirect.  The buffer might contain valid
+	    ** data newer than the data on disk (read by readpage, changed,
+	    ** and then sent here by writepage).  direct2indirect needs
+	    ** to know if unbh was already up to date, so it can decide
+	    ** if the data in unbh needs to be replaced with data from
+	    ** the disk
+	    */
+	    set_buffer_uptodate (unbh);
+
+	    /* unbh->b_page == NULL in case of DIRECT_IO request, this means
+	       buffer will disappear shortly, so it should not be added to
+	     */
+	    if ( unbh->b_page ) {
+		/* we've converted the tail, so we must
+		** flush unbh before the transaction commits
+		*/
+		reiserfs_add_tail_list(inode, unbh) ;
+
+		/* mark it dirty now to prevent commit_write from adding
+		** this buffer to the inode's dirty buffer list
+		*/
+		/*
+		 * AKPM: changed __mark_buffer_dirty to mark_buffer_dirty().
+		 * It's still atomic, but it sets the page dirty too,
+		 * which makes it eligible for writeback at any time by the
+		 * VM (which was also the case with __mark_buffer_dirty())
+		 */
+		mark_buffer_dirty(unbh) ;
+	    }
+	} else {
+	    /* append indirect item with holes if needed, when appending
+	       pointer to 'block'-th block use block, which is already
+	       allocated */
+	    struct cpu_key tmp_key;
+	    unp_t unf_single=0; // We use this in case we need to allocate only
+				// one block which is a fastpath
+	    unp_t *un;
+	    __u64 max_to_insert=MAX_ITEM_LEN(inode->i_sb->s_blocksize)/UNFM_P_SIZE;
+	    __u64 blocks_needed;
+
+	    RFALSE( pos_in_item != ih_item_len(ih) / UNFM_P_SIZE,
+		    "vs-804: invalid position for append");
+	    /* indirect item has to be appended, set up key of that position */
+	    make_cpu_key (&tmp_key, inode,
+			  le_key_k_offset (version, &(ih->ih_key)) + op_bytes_number (ih, inode->i_sb->s_blocksize),
+			  //pos_in_item * inode->i_sb->s_blocksize,
+			  TYPE_INDIRECT, 3);// key type is unimportant
+
+	    blocks_needed = 1 + ((cpu_key_k_offset (&key) - cpu_key_k_offset (&tmp_key)) >> inode->i_sb->s_blocksize_bits);
+	    RFALSE( blocks_needed < 0, "green-805: invalid offset");
+
+	    if ( blocks_needed == 1 ) {
+		un = &unf_single;
+	    } else {
+		un=kmalloc( min(blocks_needed,max_to_insert)*UNFM_P_SIZE,
+			    GFP_ATOMIC); // We need to avoid scheduling.
+		if ( !un) {
+		    un = &unf_single;
+		    blocks_needed = 1;
+		    max_to_insert = 0;
+		} else
+		    memset(un, 0, UNFM_P_SIZE * min(blocks_needed,max_to_insert));
+	    }
+	    if ( blocks_needed <= max_to_insert) {
+		/* we are going to add target block to the file. Use allocated
+		   block for that */
+		un[blocks_needed-1] = cpu_to_le32 (allocated_block_nr);
+		set_block_dev_mapped (bh_result, allocated_block_nr, inode);
+		set_buffer_new(bh_result);
+		done = 1;
+	    } else {
+		/* paste hole to the indirect item */
+		/* If kmalloc failed, max_to_insert becomes zero and it means we
+		   only have space for one block */
+		blocks_needed=max_to_insert?max_to_insert:1;
+	    }
+	    retval = reiserfs_paste_into_item (th, &path, &tmp_key, inode, (char *)un, UNFM_P_SIZE * blocks_needed);
+
+	    if (blocks_needed != 1)
+		kfree(un);
+
+	    if (retval) {
+		reiserfs_free_block (th, inode, allocated_block_nr, 1);
+		goto failure;
+	    }
+	    if (!done) {
+		/* We need to mark new file size in case this function will be
+		   interrupted/aborted later on. And we may do this only for
+		   holes. */
+		inode->i_size += inode->i_sb->s_blocksize * blocks_needed;
+	    }
+	}
+
+	if (done == 1)
+	    break;
+
+	/* this loop could log more blocks than we had originally asked
+	** for.  So, we have to allow the transaction to end if it is
+	** too big or too full.  Update the inode so things are 
+	** consistent if we crash before the function returns
+	**
+	** release the path so that anybody waiting on the path before
+	** ending their transaction will be able to continue.
+	*/
+	if (journal_transaction_should_end(th, th->t_blocks_allocated)) {
+	  retval = restart_transaction(th, inode, &path) ;
+	  if (retval)
+	    goto failure;
+	}
+	/* inserting indirect pointers for a hole can take a 
+	** long time.  reschedule if needed
+	*/
+	cond_resched();
+
+	retval = search_for_position_by_key (inode->i_sb, &key, &path);
+	if (retval == IO_ERROR) {
+	    retval = -EIO;
+	    goto failure;
+	}
+	if (retval == POSITION_FOUND) {
+	    reiserfs_warning (inode->i_sb, "vs-825: reiserfs_get_block: "
+			      "%K should not be found", &key);
+	    retval = -EEXIST;
+	    if (allocated_block_nr)
+	        reiserfs_free_block (th, inode, allocated_block_nr, 1);
+	    pathrelse(&path) ;
+	    goto failure;
+	}
+	bh = get_last_bh (&path);
+	ih = get_ih (&path);
+	item = get_item (&path);
+	pos_in_item = path.pos_in_item;
+    } while (1);
+
+
+    retval = 0;
+
+ failure:
+    if (th && (!dangle || (retval && !th->t_trans_id))) {
+        int err;
+        if (th->t_trans_id)
+            reiserfs_update_sd(th, inode);
+        err = reiserfs_end_persistent_transaction(th);
+        if (err)
+            retval = err;
+    }
+
+    reiserfs_write_unlock(inode->i_sb);
+    reiserfs_check_path(&path) ;
+    return retval;
+}
+
+static int
+reiserfs_readpages(struct file *file, struct address_space *mapping,
+		struct list_head *pages, unsigned nr_pages)
+{
+    return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
+}
+
+/* Compute real number of used bytes by file
+ * Following three functions can go away when we'll have enough space in stat item
+ */
+static int real_space_diff(struct inode *inode, int sd_size)
+{
+    int bytes;
+    loff_t blocksize = inode->i_sb->s_blocksize ;
+
+    if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode))
+        return sd_size ;
+
+    /* End of file is also in full block with indirect reference, so round
+    ** up to the next block.
+    **
+    ** there is just no way to know if the tail is actually packed
+    ** on the file, so we have to assume it isn't.  When we pack the
+    ** tail, we add 4 bytes to pretend there really is an unformatted
+    ** node pointer
+    */
+    bytes = ((inode->i_size + (blocksize-1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE + sd_size;
+    return bytes ;
+}
+
+static inline loff_t to_real_used_space(struct inode *inode, ulong blocks,
+                                        int sd_size)
+{
+    if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
+        return inode->i_size + (loff_t)(real_space_diff(inode, sd_size)) ;
+    }
+    return ((loff_t)real_space_diff(inode, sd_size)) + (((loff_t)blocks) << 9);
+}
+
+/* Compute number of blocks used by file in ReiserFS counting */
+static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size)
+{
+    loff_t bytes = inode_get_bytes(inode) ;
+    loff_t real_space = real_space_diff(inode, sd_size) ;
+
+    /* keeps fsck and non-quota versions of reiserfs happy */
+    if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
+        bytes += (loff_t)511 ;
+    }
+
+    /* files from before the quota patch might i_blocks such that
+    ** bytes < real_space.  Deal with that here to prevent it from
+    ** going negative.
+    */
+    if (bytes < real_space)
+        return 0 ;
+    return (bytes - real_space) >> 9;
+}
+
+//
+// BAD: new directories have stat data of new type and all other items
+// of old type. Version stored in the inode says about body items, so
+// in update_stat_data we can not rely on inode, but have to check
+// item version directly
+//
+
+// called by read_locked_inode
+static void init_inode (struct inode * inode, struct path * path)
+{
+    struct buffer_head * bh;
+    struct item_head * ih;
+    __u32 rdev;
+    //int version = ITEM_VERSION_1;
+
+    bh = PATH_PLAST_BUFFER (path);
+    ih = PATH_PITEM_HEAD (path);
+
+
+    copy_key (INODE_PKEY (inode), &(ih->ih_key));
+    inode->i_blksize = reiserfs_default_io_size;
+
+    INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list ));
+    REISERFS_I(inode)->i_flags = 0;
+    REISERFS_I(inode)->i_prealloc_block = 0;
+    REISERFS_I(inode)->i_prealloc_count = 0;
+    REISERFS_I(inode)->i_trans_id = 0;
+    REISERFS_I(inode)->i_jl = NULL;
+    REISERFS_I(inode)->i_acl_access = NULL;
+    REISERFS_I(inode)->i_acl_default = NULL;
+    init_rwsem (&REISERFS_I(inode)->xattr_sem);
+
+    if (stat_data_v1 (ih)) {
+	struct stat_data_v1 * sd = (struct stat_data_v1 *)B_I_PITEM (bh, ih);
+	unsigned long blocks;
+
+	set_inode_item_key_version (inode, KEY_FORMAT_3_5);
+        set_inode_sd_version (inode, STAT_DATA_V1);
+	inode->i_mode  = sd_v1_mode(sd);
+	inode->i_nlink = sd_v1_nlink(sd);
+	inode->i_uid   = sd_v1_uid(sd);
+	inode->i_gid   = sd_v1_gid(sd);
+	inode->i_size  = sd_v1_size(sd);
+	inode->i_atime.tv_sec = sd_v1_atime(sd);
+	inode->i_mtime.tv_sec = sd_v1_mtime(sd);
+	inode->i_ctime.tv_sec = sd_v1_ctime(sd);
+	inode->i_atime.tv_nsec = 0;
+	inode->i_ctime.tv_nsec = 0;
+	inode->i_mtime.tv_nsec = 0;
+
+	inode->i_blocks = sd_v1_blocks(sd);
+	inode->i_generation = le32_to_cpu (INODE_PKEY (inode)->k_dir_id);
+	blocks = (inode->i_size + 511) >> 9;
+	blocks = _ROUND_UP (blocks, inode->i_sb->s_blocksize >> 9);
+	if (inode->i_blocks > blocks) {
+	    // there was a bug in <=3.5.23 when i_blocks could take negative
+	    // values. Starting from 3.5.17 this value could even be stored in
+	    // stat data. For such files we set i_blocks based on file
+	    // size. Just 2 notes: this can be wrong for sparce files. On-disk value will be
+	    // only updated if file's inode will ever change
+	    inode->i_blocks = blocks;
+	}
+
+        rdev = sd_v1_rdev(sd);
+	REISERFS_I(inode)->i_first_direct_byte = sd_v1_first_direct_byte(sd);
+	/* an early bug in the quota code can give us an odd number for the
+	** block count.  This is incorrect, fix it here.
+	*/
+	if (inode->i_blocks & 1) {
+	    inode->i_blocks++ ;
+	}
+	inode_set_bytes(inode, to_real_used_space(inode, inode->i_blocks,
+	                                          SD_V1_SIZE));
+	/* nopack is initially zero for v1 objects. For v2 objects,
+	   nopack is initialised from sd_attrs */
+	REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
+    } else {
+	// new stat data found, but object may have old items
+	// (directories and symlinks)
+	struct stat_data * sd = (struct stat_data *)B_I_PITEM (bh, ih);
+
+	inode->i_mode   = sd_v2_mode(sd);
+	inode->i_nlink  = sd_v2_nlink(sd);
+	inode->i_uid    = sd_v2_uid(sd);
+	inode->i_size   = sd_v2_size(sd);
+	inode->i_gid    = sd_v2_gid(sd);
+	inode->i_mtime.tv_sec  = sd_v2_mtime(sd);
+	inode->i_atime.tv_sec = sd_v2_atime(sd);
+	inode->i_ctime.tv_sec  = sd_v2_ctime(sd);
+	inode->i_ctime.tv_nsec = 0;
+	inode->i_mtime.tv_nsec = 0;
+	inode->i_atime.tv_nsec = 0;
+	inode->i_blocks = sd_v2_blocks(sd);
+        rdev            = sd_v2_rdev(sd);
+	if( S_ISCHR( inode -> i_mode ) || S_ISBLK( inode -> i_mode ) )
+	    inode->i_generation = le32_to_cpu (INODE_PKEY (inode)->k_dir_id);
+	else
+            inode->i_generation = sd_v2_generation(sd);
+
+	if (S_ISDIR (inode->i_mode) || S_ISLNK (inode->i_mode))
+	    set_inode_item_key_version (inode, KEY_FORMAT_3_5);
+	else
+	    set_inode_item_key_version (inode, KEY_FORMAT_3_6);
+	REISERFS_I(inode)->i_first_direct_byte = 0;
+	set_inode_sd_version (inode, STAT_DATA_V2);
+	inode_set_bytes(inode, to_real_used_space(inode, inode->i_blocks,
+	                                          SD_V2_SIZE));
+	/* read persistent inode attributes from sd and initalise
+	   generic inode flags from them */
+	REISERFS_I(inode)->i_attrs = sd_v2_attrs( sd );
+	sd_attrs_to_i_attrs( sd_v2_attrs( sd ), inode );
+    }
+
+    pathrelse (path);
+    if (S_ISREG (inode->i_mode)) {
+	inode->i_op = &reiserfs_file_inode_operations;
+	inode->i_fop = &reiserfs_file_operations;
+	inode->i_mapping->a_ops = &reiserfs_address_space_operations ;
+    } else if (S_ISDIR (inode->i_mode)) {
+	inode->i_op = &reiserfs_dir_inode_operations;
+	inode->i_fop = &reiserfs_dir_operations;
+    } else if (S_ISLNK (inode->i_mode)) {
+	inode->i_op = &reiserfs_symlink_inode_operations;
+	inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+    } else {
+	inode->i_blocks = 0;
+	inode->i_op = &reiserfs_special_inode_operations;
+	init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
+    }
+}
+
+
+// update new stat data with inode fields
+static void inode2sd (void * sd, struct inode * inode, loff_t size)
+{
+    struct stat_data * sd_v2 = (struct stat_data *)sd;
+    __u16 flags;
+
+    set_sd_v2_mode(sd_v2, inode->i_mode );
+    set_sd_v2_nlink(sd_v2, inode->i_nlink );
+    set_sd_v2_uid(sd_v2, inode->i_uid );
+    set_sd_v2_size(sd_v2, size );
+    set_sd_v2_gid(sd_v2, inode->i_gid );
+    set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec );
+    set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec );
+    set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec );
+    set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE));
+    if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+	set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev));
+    else
+	set_sd_v2_generation(sd_v2, inode->i_generation);
+    flags = REISERFS_I(inode)->i_attrs;
+    i_attrs_to_sd_attrs( inode, &flags );
+    set_sd_v2_attrs( sd_v2, flags );
+}
+
+
+// used to copy inode's fields to old stat data
+static void inode2sd_v1 (void * sd, struct inode * inode, loff_t size)
+{
+    struct stat_data_v1 * sd_v1 = (struct stat_data_v1 *)sd;
+
+    set_sd_v1_mode(sd_v1, inode->i_mode );
+    set_sd_v1_uid(sd_v1, inode->i_uid );
+    set_sd_v1_gid(sd_v1, inode->i_gid );
+    set_sd_v1_nlink(sd_v1, inode->i_nlink );
+    set_sd_v1_size(sd_v1, size );
+    set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec );
+    set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec );
+    set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec );
+
+    if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+        set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev));
+    else
+        set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE));
+
+    // Sigh. i_first_direct_byte is back
+    set_sd_v1_first_direct_byte(sd_v1, REISERFS_I(inode)->i_first_direct_byte);
+}
+
+
+/* NOTE, you must prepare the buffer head before sending it here,
+** and then log it after the call
+*/
+static void update_stat_data (struct path * path, struct inode * inode,
+                              loff_t size)
+{
+    struct buffer_head * bh;
+    struct item_head * ih;
+  
+    bh = PATH_PLAST_BUFFER (path);
+    ih = PATH_PITEM_HEAD (path);
+
+    if (!is_statdata_le_ih (ih))
+	reiserfs_panic (inode->i_sb, "vs-13065: update_stat_data: key %k, found item %h",
+			INODE_PKEY (inode), ih);
+  
+    if (stat_data_v1 (ih)) {
+	// path points to old stat data
+	inode2sd_v1 (B_I_PITEM (bh, ih), inode, size);
+    } else {
+	inode2sd (B_I_PITEM (bh, ih), inode, size);
+    }
+
+    return;
+}
+
+
+void reiserfs_update_sd_size (struct reiserfs_transaction_handle *th,
+			      struct inode * inode, loff_t size)
+{
+    struct cpu_key key;
+    INITIALIZE_PATH(path);
+    struct buffer_head *bh ;
+    int fs_gen ;
+    struct item_head *ih, tmp_ih ;
+    int retval;
+
+    BUG_ON (!th->t_trans_id);
+
+    make_cpu_key (&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3);//key type is unimportant
+    
+    for(;;) {
+	int pos;
+	/* look for the object's stat data */
+	retval = search_item (inode->i_sb, &key, &path);
+	if (retval == IO_ERROR) {
+	    reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: "
+			      "i/o failure occurred trying to update %K stat data",
+			      &key);
+	    return;
+	}
+	if (retval == ITEM_NOT_FOUND) {
+	    pos = PATH_LAST_POSITION (&path);
+	    pathrelse(&path) ;
+	    if (inode->i_nlink == 0) {
+		/*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found");*/
+		return;
+	    }
+	    reiserfs_warning (inode->i_sb, "vs-13060: reiserfs_update_sd: "
+			      "stat data of object %k (nlink == %d) not found (pos %d)",
+			      INODE_PKEY (inode), inode->i_nlink, pos);
+	    reiserfs_check_path(&path) ;
+	    return;
+	}
+	
+	/* sigh, prepare_for_journal might schedule.  When it schedules the
+	** FS might change.  We have to detect that, and loop back to the
+	** search if the stat data item has moved
+	*/
+	bh = get_last_bh(&path) ;
+	ih = get_ih(&path) ;
+	copy_item_head (&tmp_ih, ih);
+	fs_gen = get_generation (inode->i_sb);
+	reiserfs_prepare_for_journal(inode->i_sb, bh, 1) ;
+	if (fs_changed (fs_gen, inode->i_sb) && item_moved(&tmp_ih, &path)) {
+	    reiserfs_restore_prepared_buffer(inode->i_sb, bh) ;
+	    continue ;	/* Stat_data item has been moved after scheduling. */
+	}
+	break;
+    }
+    update_stat_data (&path, inode, size);
+    journal_mark_dirty(th, th->t_super, bh) ; 
+    pathrelse (&path);
+    return;
+}
+
+/* reiserfs_read_locked_inode is called to read the inode off disk, and it
+** does a make_bad_inode when things go wrong.  But, we need to make sure
+** and clear the key in the private portion of the inode, otherwise a
+** corresponding iput might try to delete whatever object the inode last
+** represented.
+*/
+static void reiserfs_make_bad_inode(struct inode *inode) {
+    memset(INODE_PKEY(inode), 0, KEY_SIZE);
+    make_bad_inode(inode);
+}
+
+//
+// initially this function was derived from minix or ext2's analog and
+// evolved as the prototype did
+//
+
+int reiserfs_init_locked_inode (struct inode * inode, void *p)
+{
+    struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p ;
+    inode->i_ino = args->objectid;
+    INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid);
+    return 0;
+}
+
+/* looks for stat data in the tree, and fills up the fields of in-core
+   inode stat data fields */
+void reiserfs_read_locked_inode (struct inode * inode, struct reiserfs_iget_args *args)
+{
+    INITIALIZE_PATH (path_to_sd);
+    struct cpu_key key;
+    unsigned long dirino;
+    int retval;
+
+    dirino = args->dirid ;
+
+    /* set version 1, version 2 could be used too, because stat data
+       key is the same in both versions */
+    key.version = KEY_FORMAT_3_5;
+    key.on_disk_key.k_dir_id = dirino;
+    key.on_disk_key.k_objectid = inode->i_ino;
+    key.on_disk_key.u.k_offset_v1.k_offset = SD_OFFSET;
+    key.on_disk_key.u.k_offset_v1.k_uniqueness = SD_UNIQUENESS;
+
+    /* look for the object's stat data */
+    retval = search_item (inode->i_sb, &key, &path_to_sd);
+    if (retval == IO_ERROR) {
+	reiserfs_warning (inode->i_sb, "vs-13070: reiserfs_read_locked_inode: "
+			  "i/o failure occurred trying to find stat data of %K",
+			  &key);
+	reiserfs_make_bad_inode(inode) ;
+	return;
+    }
+    if (retval != ITEM_FOUND) {
+	/* a stale NFS handle can trigger this without it being an error */
+	pathrelse (&path_to_sd);
+	reiserfs_make_bad_inode(inode) ;
+	inode->i_nlink = 0;
+	return;
+    }
+
+    init_inode (inode, &path_to_sd);
+   
+    /* It is possible that knfsd is trying to access inode of a file
+       that is being removed from the disk by some other thread. As we
+       update sd on unlink all that is required is to check for nlink
+       here. This bug was first found by Sizif when debugging
+       SquidNG/Butterfly, forgotten, and found again after Philippe
+       Gramoulle <philippe.gramoulle@mmania.com> reproduced it. 
+
+       More logical fix would require changes in fs/inode.c:iput() to
+       remove inode from hash-table _after_ fs cleaned disk stuff up and
+       in iget() to return NULL if I_FREEING inode is found in
+       hash-table. */
+    /* Currently there is one place where it's ok to meet inode with
+       nlink==0: processing of open-unlinked and half-truncated files
+       during mount (fs/reiserfs/super.c:finish_unfinished()). */
+    if( ( inode -> i_nlink == 0 ) && 
+	! REISERFS_SB(inode -> i_sb) -> s_is_unlinked_ok ) {
+	    reiserfs_warning (inode->i_sb,
+			      "vs-13075: reiserfs_read_locked_inode: "
+			      "dead inode read from disk %K. "
+			      "This is likely to be race with knfsd. Ignore",
+			      &key );
+	    reiserfs_make_bad_inode( inode );
+    }
+
+    reiserfs_check_path(&path_to_sd) ; /* init inode should be relsing */
+
+}
+
+/**
+ * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
+ *
+ * @inode:    inode from hash table to check
+ * @opaque:   "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
+ *
+ * This function is called by iget5_locked() to distinguish reiserfs inodes
+ * having the same inode numbers. Such inodes can only exist due to some
+ * error condition. One of them should be bad. Inodes with identical
+ * inode numbers (objectids) are distinguished by parent directory ids.
+ *
+ */
+int reiserfs_find_actor( struct inode *inode, void *opaque )
+{
+    struct reiserfs_iget_args *args;
+
+    args = opaque;
+    /* args is already in CPU order */
+    return (inode->i_ino == args->objectid) &&
+	(le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid);
+}
+
+struct inode * reiserfs_iget (struct super_block * s, const struct cpu_key * key)
+{
+    struct inode * inode;
+    struct reiserfs_iget_args args ;
+
+    args.objectid = key->on_disk_key.k_objectid ;
+    args.dirid = key->on_disk_key.k_dir_id ;
+    inode = iget5_locked (s, key->on_disk_key.k_objectid, 
+		   reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
+    if (!inode) 
+	return ERR_PTR(-ENOMEM) ;
+
+    if (inode->i_state & I_NEW) {
+	reiserfs_read_locked_inode(inode, &args);
+	unlock_new_inode(inode);
+    }
+
+    if (comp_short_keys (INODE_PKEY (inode), key) || is_bad_inode (inode)) {
+	/* either due to i/o error or a stale NFS handle */
+	iput (inode);
+	inode = NULL;
+    }
+    return inode;
+}
+
+struct dentry *reiserfs_get_dentry(struct super_block *sb, void *vobjp)
+{
+    __u32 *data = vobjp;
+    struct cpu_key key ;
+    struct dentry *result;
+    struct inode *inode;
+    
+    key.on_disk_key.k_objectid = data[0] ;
+    key.on_disk_key.k_dir_id = data[1] ;
+    reiserfs_write_lock(sb);
+    inode = reiserfs_iget(sb, &key) ;
+    if (inode && !IS_ERR(inode) && data[2] != 0 &&
+	data[2] != inode->i_generation) {
+	    iput(inode) ;
+	    inode = NULL ;
+    }
+    reiserfs_write_unlock(sb);
+    if (!inode)
+	    inode = ERR_PTR(-ESTALE);
+    if (IS_ERR(inode))
+	    return ERR_PTR(PTR_ERR(inode));
+    result = d_alloc_anon(inode);
+    if (!result) {
+	    iput(inode);
+	    return ERR_PTR(-ENOMEM);
+    }
+    return result;
+}
+
+struct dentry *reiserfs_decode_fh(struct super_block *sb, __u32 *data,
+                                     int len, int fhtype,
+				  int (*acceptable)(void *contect, struct dentry *de),
+				  void *context) {
+    __u32 obj[3], parent[3];
+
+    /* fhtype happens to reflect the number of u32s encoded.
+     * due to a bug in earlier code, fhtype might indicate there
+     * are more u32s then actually fitted.
+     * so if fhtype seems to be more than len, reduce fhtype.
+     * Valid types are:
+     *   2 - objectid + dir_id - legacy support
+     *   3 - objectid + dir_id + generation
+     *   4 - objectid + dir_id + objectid and dirid of parent - legacy
+     *   5 - objectid + dir_id + generation + objectid and dirid of parent
+     *   6 - as above plus generation of directory
+     * 6 does not fit in NFSv2 handles
+     */
+    if (fhtype > len) {
+	    if (fhtype != 6 || len != 5)
+		    reiserfs_warning (sb, "nfsd/reiserfs, fhtype=%d, len=%d - odd",
+			   fhtype, len);
+	    fhtype = 5;
+    }
+
+    obj[0] = data[0];
+    obj[1] = data[1];
+    if (fhtype == 3 || fhtype >= 5)
+	    obj[2] = data[2];
+    else    obj[2] = 0; /* generation number */
+
+    if (fhtype >= 4) {
+	    parent[0] = data[fhtype>=5?3:2] ;
+	    parent[1] = data[fhtype>=5?4:3] ;
+	    if (fhtype == 6)
+		    parent[2] = data[5];
+	    else    parent[2] = 0;
+    }
+    return sb->s_export_op->find_exported_dentry(sb, obj, fhtype < 4 ? NULL : parent,
+			       acceptable, context);
+}
+
+int reiserfs_encode_fh(struct dentry *dentry, __u32 *data, int *lenp, int need_parent) {
+    struct inode *inode = dentry->d_inode ;
+    int maxlen = *lenp;
+    
+    if (maxlen < 3)
+        return 255 ;
+
+    data[0] = inode->i_ino ;
+    data[1] = le32_to_cpu(INODE_PKEY (inode)->k_dir_id) ;
+    data[2] = inode->i_generation ;
+    *lenp = 3 ;
+    /* no room for directory info? return what we've stored so far */
+    if (maxlen < 5 || ! need_parent)
+        return 3 ;
+
+    spin_lock(&dentry->d_lock);
+    inode = dentry->d_parent->d_inode ;
+    data[3] = inode->i_ino ;
+    data[4] = le32_to_cpu(INODE_PKEY (inode)->k_dir_id) ;
+    *lenp = 5 ;
+    if (maxlen >= 6) {
+	    data[5] = inode->i_generation ;
+	    *lenp = 6 ;
+    }
+    spin_unlock(&dentry->d_lock);
+    return *lenp ;
+}
+
+
+/* looks for stat data, then copies fields to it, marks the buffer
+   containing stat data as dirty */
+/* reiserfs inodes are never really dirty, since the dirty inode call
+** always logs them.  This call allows the VFS inode marking routines
+** to properly mark inodes for datasync and such, but only actually
+** does something when called for a synchronous update.
+*/
+int reiserfs_write_inode (struct inode * inode, int do_sync) {
+    struct reiserfs_transaction_handle th ;
+    int jbegin_count = 1 ;
+
+    if (inode->i_sb->s_flags & MS_RDONLY)
+        return -EROFS;
+    /* memory pressure can sometimes initiate write_inode calls with sync == 1,
+    ** these cases are just when the system needs ram, not when the 
+    ** inode needs to reach disk for safety, and they can safely be
+    ** ignored because the altered inode has already been logged.
+    */
+    if (do_sync && !(current->flags & PF_MEMALLOC)) {
+	reiserfs_write_lock(inode->i_sb);
+	if (!journal_begin(&th, inode->i_sb, jbegin_count)) {
+            reiserfs_update_sd (&th, inode);
+            journal_end_sync(&th, inode->i_sb, jbegin_count) ;
+        }
+	reiserfs_write_unlock(inode->i_sb);
+    }
+    return 0;
+}
+
+/* stat data of new object is inserted already, this inserts the item
+   containing "." and ".." entries */
+static int reiserfs_new_directory (struct reiserfs_transaction_handle *th, 
+				   struct inode *inode,
+				   struct item_head * ih, struct path * path,
+				   struct inode * dir)
+{
+    struct super_block * sb = th->t_super;
+    char empty_dir [EMPTY_DIR_SIZE];
+    char * body = empty_dir;
+    struct cpu_key key;
+    int retval;
+
+    BUG_ON (!th->t_trans_id);
+    
+    _make_cpu_key (&key, KEY_FORMAT_3_5, le32_to_cpu (ih->ih_key.k_dir_id),
+		   le32_to_cpu (ih->ih_key.k_objectid), DOT_OFFSET, TYPE_DIRENTRY, 3/*key length*/);
+    
+    /* compose item head for new item. Directories consist of items of
+       old type (ITEM_VERSION_1). Do not set key (second arg is 0), it
+       is done by reiserfs_new_inode */
+    if (old_format_only (sb)) {
+	make_le_item_head (ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET, TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2);
+	
+	make_empty_dir_item_v1 (body, ih->ih_key.k_dir_id, ih->ih_key.k_objectid,
+				INODE_PKEY (dir)->k_dir_id, 
+				INODE_PKEY (dir)->k_objectid );
+    } else {
+	make_le_item_head (ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET, TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2);
+	
+	make_empty_dir_item (body, ih->ih_key.k_dir_id, ih->ih_key.k_objectid,
+		   		INODE_PKEY (dir)->k_dir_id, 
+		   		INODE_PKEY (dir)->k_objectid );
+    }
+    
+    /* look for place in the tree for new item */
+    retval = search_item (sb, &key, path);
+    if (retval == IO_ERROR) {
+	reiserfs_warning (sb, "vs-13080: reiserfs_new_directory: "
+			  "i/o failure occurred creating new directory");
+	return -EIO;
+    }
+    if (retval == ITEM_FOUND) {
+	pathrelse (path);
+	reiserfs_warning (sb, "vs-13070: reiserfs_new_directory: "
+			  "object with this key exists (%k)", &(ih->ih_key));
+	return -EEXIST;
+    }
+
+    /* insert item, that is empty directory item */
+    return reiserfs_insert_item (th, path, &key, ih, inode, body);
+}
+
+
+/* stat data of object has been inserted, this inserts the item
+   containing the body of symlink */
+static int reiserfs_new_symlink (struct reiserfs_transaction_handle *th, 
+				 struct inode *inode,	/* Inode of symlink */
+				 struct item_head * ih,
+				 struct path * path, const char * symname, int item_len)
+{
+    struct super_block * sb = th->t_super;
+    struct cpu_key key;
+    int retval;
+
+    BUG_ON (!th->t_trans_id);
+
+    _make_cpu_key (&key, KEY_FORMAT_3_5, 
+		   le32_to_cpu (ih->ih_key.k_dir_id), 
+		   le32_to_cpu (ih->ih_key.k_objectid),
+		   1, TYPE_DIRECT, 3/*key length*/);
+
+    make_le_item_head (ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len, 0/*free_space*/);
+
+    /* look for place in the tree for new item */
+    retval = search_item (sb, &key, path);
+    if (retval == IO_ERROR) {
+	reiserfs_warning (sb, "vs-13080: reiserfs_new_symlinik: "
+			  "i/o failure occurred creating new symlink");
+	return -EIO;
+    }
+    if (retval == ITEM_FOUND) {
+	pathrelse (path);
+	reiserfs_warning (sb, "vs-13080: reiserfs_new_symlink: "
+			  "object with this key exists (%k)", &(ih->ih_key));
+	return -EEXIST;
+    }
+
+    /* insert item, that is body of symlink */
+    return reiserfs_insert_item (th, path, &key, ih, inode, symname);
+}
+
+
+/* inserts the stat data into the tree, and then calls
+   reiserfs_new_directory (to insert ".", ".." item if new object is
+   directory) or reiserfs_new_symlink (to insert symlink body if new
+   object is symlink) or nothing (if new object is regular file) 
+
+   NOTE! uid and gid must already be set in the inode.  If we return
+   non-zero due to an error, we have to drop the quota previously allocated
+   for the fresh inode.  This can only be done outside a transaction, so
+   if we return non-zero, we also end the transaction.  */
+int reiserfs_new_inode (struct reiserfs_transaction_handle *th,
+			struct inode * dir, int mode, 
+			const char * symname, 
+                        /* 0 for regular, EMTRY_DIR_SIZE for dirs, 
+			   strlen (symname) for symlinks)*/
+		         loff_t i_size, struct dentry *dentry, 
+			 struct inode *inode)
+{
+    struct super_block * sb;
+    INITIALIZE_PATH (path_to_key);
+    struct cpu_key key;
+    struct item_head ih;
+    struct stat_data sd;
+    int retval;
+    int err;
+
+    BUG_ON (!th->t_trans_id);
+  
+    if (DQUOT_ALLOC_INODE(inode)) {
+	err = -EDQUOT;
+	goto out_end_trans;
+    }
+    if (!dir || !dir->i_nlink) {
+	err = -EPERM;
+	goto out_bad_inode;
+    }
+
+    sb = dir->i_sb;
+
+    /* item head of new item */
+    ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
+    ih.ih_key.k_objectid = cpu_to_le32 (reiserfs_get_unused_objectid (th));
+    if (!ih.ih_key.k_objectid) {
+	err = -ENOMEM;
+	goto out_bad_inode ;
+    }
+    if (old_format_only (sb))
+	/* not a perfect generation count, as object ids can be reused, but 
+	** this is as good as reiserfs can do right now.
+	** note that the private part of inode isn't filled in yet, we have
+	** to use the directory.
+	*/
+	inode->i_generation = le32_to_cpu (INODE_PKEY (dir)->k_objectid);
+    else
+#if defined( USE_INODE_GENERATION_COUNTER )
+	inode->i_generation = le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation);
+#else
+	inode->i_generation = ++event;
+#endif
+
+    /* fill stat data */
+    inode->i_nlink = (S_ISDIR (mode) ? 2 : 1);
+
+    /* uid and gid must already be set by the caller for quota init */
+
+    /* symlink cannot be immutable or append only, right? */
+    if( S_ISLNK( inode -> i_mode ) )
+	    inode -> i_flags &= ~ ( S_IMMUTABLE | S_APPEND );
+
+    inode->i_mtime = inode->i_atime = inode->i_ctime =
+	    CURRENT_TIME_SEC;
+    inode->i_size = i_size;
+    inode->i_blocks = 0;
+    inode->i_bytes = 0;
+    REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 : 
+      U32_MAX/*NO_BYTES_IN_DIRECT_ITEM*/;
+
+    INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list ));
+    REISERFS_I(inode)->i_flags = 0;
+    REISERFS_I(inode)->i_prealloc_block = 0;
+    REISERFS_I(inode)->i_prealloc_count = 0;
+    REISERFS_I(inode)->i_trans_id = 0;
+    REISERFS_I(inode)->i_jl = NULL;
+    REISERFS_I(inode)->i_attrs =
+	REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
+    sd_attrs_to_i_attrs( REISERFS_I(inode) -> i_attrs, inode );
+    REISERFS_I(inode)->i_acl_access = NULL;
+    REISERFS_I(inode)->i_acl_default = NULL;
+    init_rwsem (&REISERFS_I(inode)->xattr_sem);
+
+    if (old_format_only (sb))
+	make_le_item_head (&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET, TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT);
+    else
+	make_le_item_head (&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET, TYPE_STAT_DATA, SD_SIZE, MAX_US_INT);
+
+    /* key to search for correct place for new stat data */
+    _make_cpu_key (&key, KEY_FORMAT_3_6, le32_to_cpu (ih.ih_key.k_dir_id),
+		   le32_to_cpu (ih.ih_key.k_objectid), SD_OFFSET, TYPE_STAT_DATA, 3/*key length*/);
+
+    /* find proper place for inserting of stat data */
+    retval = search_item (sb, &key, &path_to_key);
+    if (retval == IO_ERROR) {
+	err = -EIO;
+	goto out_bad_inode;
+    }
+    if (retval == ITEM_FOUND) {
+	pathrelse (&path_to_key);
+	err = -EEXIST;
+	goto out_bad_inode;
+    }
+    if (old_format_only (sb)) {
+	if (inode->i_uid & ~0xffff || inode->i_gid & ~0xffff) {
+	    pathrelse (&path_to_key);
+	    /* i_uid or i_gid is too big to be stored in stat data v3.5 */
+	    err = -EINVAL;
+	    goto out_bad_inode;
+	}
+	inode2sd_v1 (&sd, inode, inode->i_size);
+    } else {
+	inode2sd (&sd, inode, inode->i_size);
+    }
+    // these do not go to on-disk stat data
+    inode->i_ino = le32_to_cpu (ih.ih_key.k_objectid);
+    inode->i_blksize = reiserfs_default_io_size;
+  
+    // store in in-core inode the key of stat data and version all
+    // object items will have (directory items will have old offset
+    // format, other new objects will consist of new items)
+    memcpy (INODE_PKEY (inode), &(ih.ih_key), KEY_SIZE);
+    if (old_format_only (sb) || S_ISDIR(mode) || S_ISLNK(mode))
+        set_inode_item_key_version (inode, KEY_FORMAT_3_5);
+    else
+        set_inode_item_key_version (inode, KEY_FORMAT_3_6);
+    if (old_format_only (sb))
+	set_inode_sd_version (inode, STAT_DATA_V1);
+    else
+	set_inode_sd_version (inode, STAT_DATA_V2);
+    
+    /* insert the stat data into the tree */
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+    if (REISERFS_I(dir)->new_packing_locality)
+	th->displace_new_blocks = 1;
+#endif
+    retval = reiserfs_insert_item (th, &path_to_key, &key, &ih, inode, (char *)(&sd));
+    if (retval) {
+	err = retval;
+	reiserfs_check_path(&path_to_key) ;
+	goto out_bad_inode;
+    }
+
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+    if (!th->displace_new_blocks)
+	REISERFS_I(dir)->new_packing_locality = 0;
+#endif
+    if (S_ISDIR(mode)) {
+	/* insert item with "." and ".." */
+	retval = reiserfs_new_directory (th, inode, &ih, &path_to_key, dir);
+    }
+
+    if (S_ISLNK(mode)) {
+	/* insert body of symlink */
+	if (!old_format_only (sb))
+	    i_size = ROUND_UP(i_size);
+	retval = reiserfs_new_symlink (th, inode, &ih, &path_to_key, symname, i_size);
+    }
+    if (retval) {
+	err = retval;
+	reiserfs_check_path(&path_to_key) ;
+	journal_end(th, th->t_super, th->t_blocks_allocated);
+	goto out_inserted_sd;
+    }
+
+    /* XXX CHECK THIS */
+    if (reiserfs_posixacl (inode->i_sb)) {
+        retval = reiserfs_inherit_default_acl (dir, dentry, inode);
+        if (retval) {
+            err = retval;
+            reiserfs_check_path(&path_to_key) ;
+            journal_end(th, th->t_super, th->t_blocks_allocated);
+            goto out_inserted_sd;
+        }
+    } else if (inode->i_sb->s_flags & MS_POSIXACL) {
+	reiserfs_warning (inode->i_sb, "ACLs aren't enabled in the fs, "
+			  "but vfs thinks they are!");
+    } else if (is_reiserfs_priv_object (dir)) {
+	reiserfs_mark_inode_private (inode);
+    }
+
+    insert_inode_hash (inode);
+    reiserfs_update_sd(th, inode);
+    reiserfs_check_path(&path_to_key) ;
+
+    return 0;
+
+/* it looks like you can easily compress these two goto targets into
+ * one.  Keeping it like this doesn't actually hurt anything, and they
+ * are place holders for what the quota code actually needs.
+ */
+out_bad_inode:
+    /* Invalidate the object, nothing was inserted yet */
+    INODE_PKEY(inode)->k_objectid = 0;
+
+    /* Quota change must be inside a transaction for journaling */
+    DQUOT_FREE_INODE(inode);
+
+out_end_trans:
+    journal_end(th, th->t_super, th->t_blocks_allocated) ;
+    /* Drop can be outside and it needs more credits so it's better to have it outside */
+    DQUOT_DROP(inode);
+    inode->i_flags |= S_NOQUOTA;
+    make_bad_inode(inode);
+
+out_inserted_sd:
+    inode->i_nlink = 0;
+    th->t_trans_id = 0; /* so the caller can't use this handle later */
+    iput(inode);
+    return err;
+}
+
+/*
+** finds the tail page in the page cache,
+** reads the last block in.
+**
+** On success, page_result is set to a locked, pinned page, and bh_result
+** is set to an up to date buffer for the last block in the file.  returns 0.
+**
+** tail conversion is not done, so bh_result might not be valid for writing
+** check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before
+** trying to write the block.
+**
+** on failure, nonzero is returned, page_result and bh_result are untouched.
+*/
+static int grab_tail_page(struct inode *p_s_inode, 
+			  struct page **page_result, 
+			  struct buffer_head **bh_result) {
+
+    /* we want the page with the last byte in the file,
+    ** not the page that will hold the next byte for appending
+    */
+    unsigned long index = (p_s_inode->i_size-1) >> PAGE_CACHE_SHIFT ;
+    unsigned long pos = 0 ;
+    unsigned long start = 0 ;
+    unsigned long blocksize = p_s_inode->i_sb->s_blocksize ;
+    unsigned long offset = (p_s_inode->i_size) & (PAGE_CACHE_SIZE - 1) ;
+    struct buffer_head *bh ;
+    struct buffer_head *head ;
+    struct page * page ;
+    int error ;
+    
+    /* we know that we are only called with inode->i_size > 0.
+    ** we also know that a file tail can never be as big as a block
+    ** If i_size % blocksize == 0, our file is currently block aligned
+    ** and it won't need converting or zeroing after a truncate.
+    */
+    if ((offset & (blocksize - 1)) == 0) {
+        return -ENOENT ;
+    }
+    page = grab_cache_page(p_s_inode->i_mapping, index) ;
+    error = -ENOMEM ;
+    if (!page) {
+        goto out ;
+    }
+    /* start within the page of the last block in the file */
+    start = (offset / blocksize) * blocksize ;
+
+    error = block_prepare_write(page, start, offset, 
+				reiserfs_get_block_create_0) ;
+    if (error)
+	goto unlock ;
+
+    head = page_buffers(page) ;      
+    bh = head;
+    do {
+	if (pos >= start) {
+	    break ;
+	}
+	bh = bh->b_this_page ;
+	pos += blocksize ;
+    } while(bh != head) ;
+
+    if (!buffer_uptodate(bh)) {
+	/* note, this should never happen, prepare_write should
+	** be taking care of this for us.  If the buffer isn't up to date,
+	** I've screwed up the code to find the buffer, or the code to
+	** call prepare_write
+	*/
+	reiserfs_warning (p_s_inode->i_sb,
+			  "clm-6000: error reading block %lu on dev %s",
+			  bh->b_blocknr,
+			  reiserfs_bdevname (p_s_inode->i_sb)) ;
+	error = -EIO ;
+	goto unlock ;
+    }
+    *bh_result = bh ;
+    *page_result = page ;
+
+out:
+    return error ;
+
+unlock:
+    unlock_page(page) ;
+    page_cache_release(page) ;
+    return error ;
+}
+
+/*
+** vfs version of truncate file.  Must NOT be called with
+** a transaction already started.
+**
+** some code taken from block_truncate_page
+*/
+int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps) {
+    struct reiserfs_transaction_handle th ;
+    /* we want the offset for the first byte after the end of the file */
+    unsigned long offset = p_s_inode->i_size & (PAGE_CACHE_SIZE - 1) ;
+    unsigned blocksize = p_s_inode->i_sb->s_blocksize ;
+    unsigned length ;
+    struct page *page = NULL ;
+    int error ;
+    struct buffer_head *bh = NULL ;
+
+    reiserfs_write_lock(p_s_inode->i_sb);
+
+    if (p_s_inode->i_size > 0) {
+        if ((error = grab_tail_page(p_s_inode, &page, &bh))) {
+	    // -ENOENT means we truncated past the end of the file, 
+	    // and get_block_create_0 could not find a block to read in,
+	    // which is ok.
+	    if (error != -ENOENT)
+	        reiserfs_warning (p_s_inode->i_sb,
+				  "clm-6001: grab_tail_page failed %d",
+				  error);
+	    page = NULL ;
+	    bh = NULL ;
+	}
+    }
+
+    /* so, if page != NULL, we have a buffer head for the offset at 
+    ** the end of the file. if the bh is mapped, and bh->b_blocknr != 0, 
+    ** then we have an unformatted node.  Otherwise, we have a direct item, 
+    ** and no zeroing is required on disk.  We zero after the truncate, 
+    ** because the truncate might pack the item anyway 
+    ** (it will unmap bh if it packs).
+    */
+    /* it is enough to reserve space in transaction for 2 balancings:
+       one for "save" link adding and another for the first
+       cut_from_item. 1 is for update_sd */
+    error = journal_begin (&th, p_s_inode->i_sb,
+                           JOURNAL_PER_BALANCE_CNT * 2 + 1);
+    if (error)
+        goto out;
+    reiserfs_update_inode_transaction(p_s_inode) ;
+    if (update_timestamps)
+	    /* we are doing real truncate: if the system crashes before the last
+	       transaction of truncating gets committed - on reboot the file
+	       either appears truncated properly or not truncated at all */
+	add_save_link (&th, p_s_inode, 1);
+    error = reiserfs_do_truncate (&th, p_s_inode, page, update_timestamps) ;
+    if (error)
+        goto out;
+    error = journal_end (&th, p_s_inode->i_sb, JOURNAL_PER_BALANCE_CNT * 2 + 1);
+    if (error)
+        goto out;
+
+    if (update_timestamps) {
+	error = remove_save_link (p_s_inode, 1/* truncate */);
+        if (error)
+            goto out;
+    }
+
+    if (page) {
+        length = offset & (blocksize - 1) ;
+	/* if we are not on a block boundary */
+	if (length) {
+	    char *kaddr;
+
+	    length = blocksize - length ;
+	    kaddr = kmap_atomic(page, KM_USER0) ;
+	    memset(kaddr + offset, 0, length) ;   
+	    flush_dcache_page(page) ;
+	    kunmap_atomic(kaddr, KM_USER0) ;
+	    if (buffer_mapped(bh) && bh->b_blocknr != 0) {
+	        mark_buffer_dirty(bh) ;
+	    }
+	}
+	unlock_page(page) ;
+	page_cache_release(page) ;
+    }
+
+    reiserfs_write_unlock(p_s_inode->i_sb);
+    return 0;
+out:
+    if (page) {
+        unlock_page (page);
+        page_cache_release (page);
+    }
+    reiserfs_write_unlock(p_s_inode->i_sb);
+    return error;
+}
+
+static int map_block_for_writepage(struct inode *inode, 
+			       struct buffer_head *bh_result, 
+                               unsigned long block) {
+    struct reiserfs_transaction_handle th ;
+    int fs_gen ;
+    struct item_head tmp_ih ;
+    struct item_head *ih ;
+    struct buffer_head *bh ;
+    __u32 *item ;
+    struct cpu_key key ;
+    INITIALIZE_PATH(path) ;
+    int pos_in_item ;
+    int jbegin_count = JOURNAL_PER_BALANCE_CNT ;
+    loff_t byte_offset = (block << inode->i_sb->s_blocksize_bits) + 1 ;
+    int retval ;
+    int use_get_block = 0 ;
+    int bytes_copied = 0 ;
+    int copy_size ;
+    int trans_running = 0;
+
+    /* catch places below that try to log something without starting a trans */
+    th.t_trans_id = 0;
+
+    if (!buffer_uptodate(bh_result)) {
+	return -EIO;
+    }
+
+    kmap(bh_result->b_page) ;
+start_over:
+    reiserfs_write_lock(inode->i_sb);
+    make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3) ;
+
+research:
+    retval = search_for_position_by_key(inode->i_sb, &key, &path) ;
+    if (retval != POSITION_FOUND) {
+        use_get_block = 1;
+	goto out ;
+    } 
+
+    bh = get_last_bh(&path) ;
+    ih = get_ih(&path) ;
+    item = get_item(&path) ;
+    pos_in_item = path.pos_in_item ;
+
+    /* we've found an unformatted node */
+    if (indirect_item_found(retval, ih)) {
+	if (bytes_copied > 0) {
+	    reiserfs_warning (inode->i_sb, "clm-6002: bytes_copied %d",
+			      bytes_copied) ;
+	}
+        if (!get_block_num(item, pos_in_item)) {
+	    /* crap, we are writing to a hole */
+	    use_get_block = 1;
+	    goto out ;
+	}
+	set_block_dev_mapped(bh_result, get_block_num(item,pos_in_item),inode);
+    } else if (is_direct_le_ih(ih)) {
+        char *p ; 
+        p = page_address(bh_result->b_page) ;
+        p += (byte_offset -1) & (PAGE_CACHE_SIZE - 1) ;
+        copy_size = ih_item_len(ih) - pos_in_item;
+
+	fs_gen = get_generation(inode->i_sb) ;
+	copy_item_head(&tmp_ih, ih) ;
+
+	if (!trans_running) {
+	    /* vs-3050 is gone, no need to drop the path */
+	    retval = journal_begin(&th, inode->i_sb, jbegin_count) ;
+            if (retval)
+                goto out;
+	    reiserfs_update_inode_transaction(inode) ;
+	    trans_running = 1;
+	    if (fs_changed(fs_gen, inode->i_sb) && item_moved(&tmp_ih, &path)) {
+		reiserfs_restore_prepared_buffer(inode->i_sb, bh) ;
+		goto research;
+	    }
+	}
+
+	reiserfs_prepare_for_journal(inode->i_sb, bh, 1) ;
+
+	if (fs_changed (fs_gen, inode->i_sb) && item_moved (&tmp_ih, &path)) {
+	    reiserfs_restore_prepared_buffer(inode->i_sb, bh) ;
+	    goto research;
+	}
+
+	memcpy( B_I_PITEM(bh, ih) + pos_in_item, p + bytes_copied, copy_size) ;
+
+	journal_mark_dirty(&th, inode->i_sb, bh) ;
+	bytes_copied += copy_size ;
+	set_block_dev_mapped(bh_result, 0, inode);
+
+	/* are there still bytes left? */
+        if (bytes_copied < bh_result->b_size && 
+	    (byte_offset + bytes_copied) < inode->i_size) {
+	    set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + copy_size) ;
+	    goto research ;
+	}
+    } else {
+        reiserfs_warning (inode->i_sb,
+			  "clm-6003: bad item inode %lu, device %s",
+			  inode->i_ino, reiserfs_bdevname (inode->i_sb)) ;
+        retval = -EIO ;
+	goto out ;
+    }
+    retval = 0 ;
+    
+out:
+    pathrelse(&path) ;
+    if (trans_running) {
+        int err = journal_end(&th, inode->i_sb, jbegin_count) ;
+        if (err)
+            retval = err;
+	trans_running = 0;
+    }
+    reiserfs_write_unlock(inode->i_sb);
+
+    /* this is where we fill in holes in the file. */
+    if (use_get_block) {
+	retval = reiserfs_get_block(inode, block, bh_result, 
+	                            GET_BLOCK_CREATE | GET_BLOCK_NO_ISEM |
+				    GET_BLOCK_NO_DANGLE);
+	if (!retval) {
+	    if (!buffer_mapped(bh_result) || bh_result->b_blocknr == 0) {
+	        /* get_block failed to find a mapped unformatted node. */
+		use_get_block = 0 ;
+		goto start_over ;
+	    }
+	}
+    }
+    kunmap(bh_result->b_page) ;
+
+    if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
+	/* we've copied data from the page into the direct item, so the
+	 * buffer in the page is now clean, mark it to reflect that.
+	 */
+        lock_buffer(bh_result);
+	clear_buffer_dirty(bh_result);
+	unlock_buffer(bh_result);
+    }
+    return retval ;
+}
+
+/* 
+ * mason@suse.com: updated in 2.5.54 to follow the same general io 
+ * start/recovery path as __block_write_full_page, along with special
+ * code to handle reiserfs tails.
+ */
+static int reiserfs_write_full_page(struct page *page, struct writeback_control *wbc) {
+    struct inode *inode = page->mapping->host ;
+    unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT ;
+    int error = 0;
+    unsigned long block ;
+    struct buffer_head *head, *bh;
+    int partial = 0 ;
+    int nr = 0;
+    int checked = PageChecked(page);
+    struct reiserfs_transaction_handle th;
+    struct super_block *s = inode->i_sb;
+    int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
+    th.t_trans_id = 0;
+
+    /* The page dirty bit is cleared before writepage is called, which
+     * means we have to tell create_empty_buffers to make dirty buffers
+     * The page really should be up to date at this point, so tossing
+     * in the BH_Uptodate is just a sanity check.
+     */
+    if (!page_has_buffers(page)) {
+	create_empty_buffers(page, s->s_blocksize,
+	                    (1 << BH_Dirty) | (1 << BH_Uptodate));
+    }
+    head = page_buffers(page) ;
+
+    /* last page in the file, zero out any contents past the
+    ** last byte in the file
+    */
+    if (page->index >= end_index) {
+	char *kaddr;
+	unsigned last_offset;
+
+        last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1) ;
+	/* no file contents in this page */
+	if (page->index >= end_index + 1 || !last_offset) {
+    	    unlock_page(page);
+	    return 0;
+	}
+	kaddr = kmap_atomic(page, KM_USER0);
+	memset(kaddr + last_offset, 0, PAGE_CACHE_SIZE-last_offset) ;
+	flush_dcache_page(page) ;
+	kunmap_atomic(kaddr, KM_USER0) ;
+    }
+    bh = head ;
+    block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits) ;
+    /* first map all the buffers, logging any direct items we find */
+    do {
+	if ((checked || buffer_dirty(bh)) && (!buffer_mapped(bh) ||
+	   (buffer_mapped(bh) && bh->b_blocknr == 0))) {
+	    /* not mapped yet, or it points to a direct item, search
+	     * the btree for the mapping info, and log any direct
+	     * items found
+	     */
+	    if ((error = map_block_for_writepage(inode, bh, block))) {
+		goto fail ;
+	    }
+	}
+        bh = bh->b_this_page;
+	block++;
+    } while(bh != head) ;
+
+    /*
+     * we start the transaction after map_block_for_writepage,
+     * because it can create holes in the file (an unbounded operation).
+     * starting it here, we can make a reliable estimate for how many
+     * blocks we're going to log
+     */
+    if (checked) {
+	ClearPageChecked(page);
+	reiserfs_write_lock(s);
+	error = journal_begin(&th, s, bh_per_page + 1);
+	if (error) {
+	    reiserfs_write_unlock(s);
+	    goto fail;
+	}
+	reiserfs_update_inode_transaction(inode);
+    }
+    /* now go through and lock any dirty buffers on the page */
+    do {
+	get_bh(bh);
+	if (!buffer_mapped(bh))
+	    continue;
+	if (buffer_mapped(bh) && bh->b_blocknr == 0)
+	    continue;
+
+	if (checked) {
+	    reiserfs_prepare_for_journal(s, bh, 1);
+	    journal_mark_dirty(&th, s, bh);
+	    continue;
+	}
+	/* from this point on, we know the buffer is mapped to a
+	 * real block and not a direct item
+	 */
+	if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+	    lock_buffer(bh);
+	} else {
+	    if (test_set_buffer_locked(bh)) {
+		redirty_page_for_writepage(wbc, page);
+		continue;
+	    }
+	}
+	if (test_clear_buffer_dirty(bh)) {
+	    mark_buffer_async_write(bh);
+	} else {
+	    unlock_buffer(bh);
+	}
+    } while((bh = bh->b_this_page) != head);
+
+    if (checked) {
+	error = journal_end(&th, s, bh_per_page + 1);
+	reiserfs_write_unlock(s);
+	if (error)
+	    goto fail;
+    }
+    BUG_ON(PageWriteback(page));
+    set_page_writeback(page);
+    unlock_page(page);
+
+    /*
+     * since any buffer might be the only dirty buffer on the page, 
+     * the first submit_bh can bring the page out of writeback.
+     * be careful with the buffers.
+     */
+    do {
+        struct buffer_head *next = bh->b_this_page;
+	if (buffer_async_write(bh)) {
+	    submit_bh(WRITE, bh);
+	    nr++;
+	}
+	put_bh(bh);
+	bh = next;
+    } while(bh != head);
+
+    error = 0;
+done:
+    if (nr == 0) {
+        /*
+         * if this page only had a direct item, it is very possible for
+         * no io to be required without there being an error.  Or, 
+	 * someone else could have locked them and sent them down the 
+	 * pipe without locking the page
+	 */
+	bh = head ;
+	do {
+	    if (!buffer_uptodate(bh)) {
+	        partial = 1;
+		break;
+	    }
+	    bh = bh->b_this_page;
+	} while(bh != head);
+	if (!partial)
+	    SetPageUptodate(page);
+	end_page_writeback(page);
+    }
+    return error;
+
+fail:
+    /* catches various errors, we need to make sure any valid dirty blocks
+     * get to the media.  The page is currently locked and not marked for 
+     * writeback
+     */
+    ClearPageUptodate(page);
+    bh = head;
+    do {
+	get_bh(bh);
+	if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) {
+	    lock_buffer(bh);
+	    mark_buffer_async_write(bh);
+	} else {
+	    /*
+	     * clear any dirty bits that might have come from getting
+	     * attached to a dirty page
+	     */
+	     clear_buffer_dirty(bh);
+	}
+        bh = bh->b_this_page;
+    } while(bh != head);
+    SetPageError(page);
+    BUG_ON(PageWriteback(page));
+    set_page_writeback(page);
+    unlock_page(page);
+    do {
+        struct buffer_head *next = bh->b_this_page;
+	if (buffer_async_write(bh)) {
+	    clear_buffer_dirty(bh);
+	    submit_bh(WRITE, bh);
+	    nr++;
+	}
+	put_bh(bh);
+	bh = next;
+    } while(bh != head);
+    goto done;
+}
+
+
+static int reiserfs_readpage (struct file *f, struct page * page)
+{
+    return block_read_full_page (page, reiserfs_get_block);
+}
+
+
+static int reiserfs_writepage (struct page * page, struct writeback_control *wbc)
+{
+    struct inode *inode = page->mapping->host ;
+    reiserfs_wait_on_write_block(inode->i_sb) ;
+    return reiserfs_write_full_page(page, wbc) ;
+}
+
+static int reiserfs_prepare_write(struct file *f, struct page *page,
+			   unsigned from, unsigned to) {
+    struct inode *inode = page->mapping->host ;
+    int ret;
+    int old_ref = 0;
+
+    reiserfs_wait_on_write_block(inode->i_sb) ;
+    fix_tail_page_for_writing(page) ;
+    if (reiserfs_transaction_running(inode->i_sb)) {
+	struct reiserfs_transaction_handle *th;
+	th = (struct reiserfs_transaction_handle *)current->journal_info;
+        BUG_ON (!th->t_refcount);
+        BUG_ON (!th->t_trans_id);
+	old_ref = th->t_refcount;
+	th->t_refcount++;
+    }
+
+    ret = block_prepare_write(page, from, to, reiserfs_get_block) ;
+    if (ret && reiserfs_transaction_running(inode->i_sb)) {
+    	struct reiserfs_transaction_handle *th = current->journal_info;
+	/* this gets a little ugly.  If reiserfs_get_block returned an
+	 * error and left a transacstion running, we've got to close it,
+	 * and we've got to free handle if it was a persistent transaction.
+	 *
+	 * But, if we had nested into an existing transaction, we need
+	 * to just drop the ref count on the handle.
+	 *
+	 * If old_ref == 0, the transaction is from reiserfs_get_block,
+	 * and it was a persistent trans.  Otherwise, it was nested above.
+	 */
+	if (th->t_refcount > old_ref) {
+	    if (old_ref)
+	    	th->t_refcount--;
+	    else {
+                int err;
+		reiserfs_write_lock(inode->i_sb);
+		err = reiserfs_end_persistent_transaction(th);
+		reiserfs_write_unlock(inode->i_sb);
+                if (err)
+                    ret = err;
+	    }
+	}
+    }
+    return ret;
+
+}
+
+
+static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block) {
+  return generic_block_bmap(as, block, reiserfs_bmap) ;
+}
+
+static int reiserfs_commit_write(struct file *f, struct page *page, 
+                                 unsigned from, unsigned to) {
+    struct inode *inode = page->mapping->host ;
+    loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+    int ret = 0;
+    int update_sd = 0;
+    struct reiserfs_transaction_handle *th = NULL;
+    
+    reiserfs_wait_on_write_block(inode->i_sb) ;
+    if (reiserfs_transaction_running(inode->i_sb)) {
+        th = current->journal_info;
+    }
+    reiserfs_commit_page(inode, page, from, to);
+ 
+    /* generic_commit_write does this for us, but does not update the
+    ** transaction tracking stuff when the size changes.  So, we have
+    ** to do the i_size updates here.
+    */
+    if (pos > inode->i_size) {
+	struct reiserfs_transaction_handle myth ;
+	reiserfs_write_lock(inode->i_sb);
+	/* If the file have grown beyond the border where it
+	   can have a tail, unmark it as needing a tail
+	   packing */
+	if ( (have_large_tails (inode->i_sb) && inode->i_size > i_block_size (inode)*4) ||
+	     (have_small_tails (inode->i_sb) && inode->i_size > i_block_size(inode)) )
+	    REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask ;
+
+	ret = journal_begin(&myth, inode->i_sb, 1) ;
+	if (ret) {
+	    reiserfs_write_unlock(inode->i_sb);
+	    goto journal_error;
+	}
+	reiserfs_update_inode_transaction(inode) ;
+	inode->i_size = pos ;
+	reiserfs_update_sd(&myth, inode) ;
+	update_sd = 1;
+	ret = journal_end(&myth, inode->i_sb, 1) ;
+	reiserfs_write_unlock(inode->i_sb);
+	if (ret)
+	    goto journal_error;
+    }
+    if (th) {
+	reiserfs_write_lock(inode->i_sb);
+	if (!update_sd)
+	    reiserfs_update_sd(th, inode) ;
+	ret = reiserfs_end_persistent_transaction(th);
+	reiserfs_write_unlock(inode->i_sb);
+	if (ret)
+	    goto out;
+    }
+ 
+    /* we test for O_SYNC here so we can commit the transaction
+    ** for any packed tails the file might have had
+    */
+    if (f && (f->f_flags & O_SYNC)) {
+	reiserfs_write_lock(inode->i_sb);
+ 	ret = reiserfs_commit_for_inode(inode) ;
+	reiserfs_write_unlock(inode->i_sb);
+    }
+out:
+    return ret ;
+
+journal_error:
+    if (th) {
+	reiserfs_write_lock(inode->i_sb);
+	if (!update_sd)
+	    reiserfs_update_sd(th, inode) ;
+        ret = reiserfs_end_persistent_transaction(th);
+	reiserfs_write_unlock(inode->i_sb);
+    }
+
+    return ret;
+}
+
+void sd_attrs_to_i_attrs( __u16 sd_attrs, struct inode *inode )
+{
+	if( reiserfs_attrs( inode -> i_sb ) ) {
+		if( sd_attrs & REISERFS_SYNC_FL )
+			inode -> i_flags |= S_SYNC;
+		else
+			inode -> i_flags &= ~S_SYNC;
+		if( sd_attrs & REISERFS_IMMUTABLE_FL )
+			inode -> i_flags |= S_IMMUTABLE;
+		else
+			inode -> i_flags &= ~S_IMMUTABLE;
+		if( sd_attrs & REISERFS_APPEND_FL )
+			inode -> i_flags |= S_APPEND;
+		else
+			inode -> i_flags &= ~S_APPEND;
+		if( sd_attrs & REISERFS_NOATIME_FL )
+			inode -> i_flags |= S_NOATIME;
+		else
+			inode -> i_flags &= ~S_NOATIME;
+		if( sd_attrs & REISERFS_NOTAIL_FL )
+			REISERFS_I(inode)->i_flags |= i_nopack_mask;
+		else
+			REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
+	}
+}
+
+void i_attrs_to_sd_attrs( struct inode *inode, __u16 *sd_attrs )
+{
+	if( reiserfs_attrs( inode -> i_sb ) ) {
+		if( inode -> i_flags & S_IMMUTABLE )
+			*sd_attrs |= REISERFS_IMMUTABLE_FL;
+		else
+			*sd_attrs &= ~REISERFS_IMMUTABLE_FL;
+		if( inode -> i_flags & S_SYNC )
+			*sd_attrs |= REISERFS_SYNC_FL;
+		else
+			*sd_attrs &= ~REISERFS_SYNC_FL;
+		if( inode -> i_flags & S_NOATIME )
+			*sd_attrs |= REISERFS_NOATIME_FL;
+		else
+			*sd_attrs &= ~REISERFS_NOATIME_FL;
+		if( REISERFS_I(inode)->i_flags & i_nopack_mask )
+			*sd_attrs |= REISERFS_NOTAIL_FL;
+		else
+			*sd_attrs &= ~REISERFS_NOTAIL_FL;
+	}
+}
+
+/* decide if this buffer needs to stay around for data logging or ordered
+** write purposes
+*/
+static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh)
+{
+    int ret = 1 ;
+    struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb) ;
+
+    spin_lock(&j->j_dirty_buffers_lock) ;
+    if (!buffer_mapped(bh)) {
+        goto free_jh;
+    }
+    /* the page is locked, and the only places that log a data buffer
+     * also lock the page.
+     */
+    if (reiserfs_file_data_log(inode)) {
+	/*
+	 * very conservative, leave the buffer pinned if
+	 * anyone might need it.
+	 */
+        if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
+	    ret = 0 ;
+	}
+    } else
+    if (buffer_dirty(bh) || buffer_locked(bh)) {
+	struct reiserfs_journal_list *jl;
+	struct reiserfs_jh *jh = bh->b_private;
+
+	/* why is this safe?
+	 * reiserfs_setattr updates i_size in the on disk
+	 * stat data before allowing vmtruncate to be called.
+	 *
+	 * If buffer was put onto the ordered list for this
+	 * transaction, we know for sure either this transaction
+	 * or an older one already has updated i_size on disk,
+	 * and this ordered data won't be referenced in the file
+	 * if we crash.
+	 *
+	 * if the buffer was put onto the ordered list for an older
+	 * transaction, we need to leave it around
+	 */
+	if (jh && (jl = jh->jl) && jl != SB_JOURNAL(inode->i_sb)->j_current_jl)
+	    ret = 0;
+    }
+free_jh:
+    if (ret && bh->b_private) {
+        reiserfs_free_jh(bh);
+    }
+    spin_unlock(&j->j_dirty_buffers_lock) ;
+    return ret ;
+}
+
+/* clm -- taken from fs/buffer.c:block_invalidate_page */
+static int reiserfs_invalidatepage(struct page *page, unsigned long offset)
+{
+    struct buffer_head *head, *bh, *next;
+    struct inode *inode = page->mapping->host;
+    unsigned int curr_off = 0;
+    int ret = 1;
+
+    BUG_ON(!PageLocked(page));
+
+    if (offset == 0)
+	ClearPageChecked(page);
+
+    if (!page_has_buffers(page))
+	goto out;
+
+    head = page_buffers(page);
+    bh = head;
+    do {
+	unsigned int next_off = curr_off + bh->b_size;
+	next = bh->b_this_page;
+
+	/*
+	 * is this block fully invalidated?
+	 */
+	if (offset <= curr_off) {
+	    if (invalidatepage_can_drop(inode, bh))
+		reiserfs_unmap_buffer(bh);
+	    else
+	        ret = 0;
+	}
+	curr_off = next_off;
+	bh = next;
+    } while (bh != head);
+
+    /*
+     * We release buffers only if the entire page is being invalidated.
+     * The get_block cached value has been unconditionally invalidated,
+     * so real IO is not possible anymore.
+     */
+    if (!offset && ret)
+	ret = try_to_release_page(page, 0);
+out:
+    return ret;
+}
+
+static int reiserfs_set_page_dirty(struct page *page) {
+    struct inode *inode = page->mapping->host;
+    if (reiserfs_file_data_log(inode)) {
+	SetPageChecked(page);
+	return __set_page_dirty_nobuffers(page);
+    }
+    return __set_page_dirty_buffers(page);
+}
+
+/*
+ * Returns 1 if the page's buffers were dropped.  The page is locked.
+ *
+ * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads
+ * in the buffers at page_buffers(page).
+ *
+ * even in -o notail mode, we can't be sure an old mount without -o notail
+ * didn't create files with tails.
+ */
+static int reiserfs_releasepage(struct page *page, int unused_gfp_flags)
+{
+    struct inode *inode = page->mapping->host ;
+    struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb) ;
+    struct buffer_head *head ;
+    struct buffer_head *bh ;
+    int ret = 1 ;
+
+    WARN_ON(PageChecked(page));
+    spin_lock(&j->j_dirty_buffers_lock) ;
+    head = page_buffers(page) ;
+    bh = head ;
+    do {
+	if (bh->b_private) {
+	    if (!buffer_dirty(bh) && !buffer_locked(bh)) {
+		reiserfs_free_jh(bh);
+	    } else {
+		ret = 0 ;
+		break ;
+	    }
+	}
+	bh = bh->b_this_page ;
+    } while (bh != head) ;
+    if (ret)
+	ret = try_to_free_buffers(page) ;
+    spin_unlock(&j->j_dirty_buffers_lock) ;
+    return ret ;
+}
+
+/* We thank Mingming Cao for helping us understand in great detail what
+   to do in this section of the code. */
+static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
+		const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+{
+    struct file *file = iocb->ki_filp;
+    struct inode *inode = file->f_mapping->host;
+
+    return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+			offset, nr_segs, reiserfs_get_blocks_direct_io, NULL);
+}
+
+int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) {
+    struct inode *inode = dentry->d_inode ;
+    int error ;
+    unsigned int ia_valid = attr->ia_valid;
+    reiserfs_write_lock(inode->i_sb);
+    if (attr->ia_valid & ATTR_SIZE) {
+	/* version 2 items will be caught by the s_maxbytes check
+	** done for us in vmtruncate
+	*/
+	if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
+	    attr->ia_size > MAX_NON_LFS) {
+	    error = -EFBIG ;
+	    goto out;
+	}
+	/* fill in hole pointers in the expanding truncate case. */
+        if (attr->ia_size > inode->i_size) {
+	    error = generic_cont_expand(inode, attr->ia_size) ;
+	    if (REISERFS_I(inode)->i_prealloc_count > 0) {
+		int err;
+		struct reiserfs_transaction_handle th ;
+		/* we're changing at most 2 bitmaps, inode + super */
+		err = journal_begin(&th, inode->i_sb, 4) ;
+		if (!err) {
+		    reiserfs_discard_prealloc (&th, inode);
+		    err = journal_end(&th, inode->i_sb, 4) ;
+		}
+		if (err)
+		    error = err;
+	    }
+	    if (error)
+	        goto out;
+	}
+    }
+
+    if ((((attr->ia_valid & ATTR_UID) && (attr->ia_uid & ~0xffff)) ||
+	 ((attr->ia_valid & ATTR_GID) && (attr->ia_gid & ~0xffff))) &&
+	(get_inode_sd_version (inode) == STAT_DATA_V1)) {
+		/* stat data of format v3.5 has 16 bit uid and gid */
+	    error = -EINVAL;
+	    goto out;
+	}
+
+    error = inode_change_ok(inode, attr) ;
+    if (!error) {
+	if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+	    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+                error = reiserfs_chown_xattrs (inode, attr);
+
+                if (!error) {
+		    struct reiserfs_transaction_handle th;
+
+		    /* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
+		    journal_begin(&th, inode->i_sb, 4*REISERFS_QUOTA_INIT_BLOCKS+2);
+                    error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
+		    if (error) {
+			journal_end(&th, inode->i_sb, 4*REISERFS_QUOTA_INIT_BLOCKS+2);
+			goto out;
+		    }
+		    /* Update corresponding info in inode so that everything is in
+		     * one transaction */
+		    if (attr->ia_valid & ATTR_UID)
+			inode->i_uid = attr->ia_uid;
+		    if (attr->ia_valid & ATTR_GID)
+			inode->i_gid = attr->ia_gid;
+		    mark_inode_dirty(inode);
+		    journal_end(&th, inode->i_sb, 4*REISERFS_QUOTA_INIT_BLOCKS+2);
+		}
+        }
+        if (!error)
+            error = inode_setattr(inode, attr) ;
+    }
+
+
+    if (!error && reiserfs_posixacl (inode->i_sb)) {
+        if (attr->ia_valid & ATTR_MODE)
+            error = reiserfs_acl_chmod (inode);
+    }
+
+out:
+    reiserfs_write_unlock(inode->i_sb);
+    return error ;
+}
+
+
+
+struct address_space_operations reiserfs_address_space_operations = {
+    .writepage = reiserfs_writepage,
+    .readpage = reiserfs_readpage, 
+    .readpages = reiserfs_readpages, 
+    .releasepage = reiserfs_releasepage,
+    .invalidatepage = reiserfs_invalidatepage,
+    .sync_page = block_sync_page,
+    .prepare_write = reiserfs_prepare_write,
+    .commit_write = reiserfs_commit_write,
+    .bmap = reiserfs_aop_bmap,
+    .direct_IO = reiserfs_direct_IO,
+    .set_page_dirty = reiserfs_set_page_dirty,
+} ;