Formerly getblk.c.~2~

1 files changed, 391 insertions, 374 deletions

diff --git a/ext2fs/getblk.c b/ext2fs/getblk.c
index 3972694e..e67494d2 100644
--- a/ext2fs/getblk.c
+++ b/ext2fs/getblk.c
@@ -15,17 +15,11 @@
  *  Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  */
 
-#define inode_bmap(inode, nr) ((inode)->u.ext2_i.i_data[(nr)])
-
-static int block_bmap (char * bh, int nr)
+#define inode_bmap(node, nr) ((node)->dn.info.i_data[(nr)])
+static inline int 
+block_bmap (char *bh, int nr)
 {
-	int tmp;
-
-	if (!bh)
-		return 0;
-	tmp = ((u32 *) bh)[nr];
-	brelse (bh);
-	return tmp;
+  return bh ? ((u32 *) bh)[nr] : 0;
 }
 
 /* 
@@ -35,408 +29,431 @@ static int block_bmap (char * bh, int nr)
  * here, since ext2_new_block will do the necessary locking and we
  * can't block until then.
  */
-void ext2_discard_prealloc (struct inode * inode)
+void 
+ext2_discard_prealloc (struct inode *inode)
 {
 #ifdef EXT2_PREALLOCATE
-	if (inode->u.ext2_i.i_prealloc_count) {
-		int i = inode->u.ext2_i.i_prealloc_count;
-		inode->u.ext2_i.i_prealloc_count = 0;
-		ext2_free_blocks (inode->i_sb,
-				  inode->u.ext2_i.i_prealloc_block,
-				  i);
-	}
+  if (node->dn->info.i_prealloc_count)
+    {
+      int i = node->dn->info.i_prealloc_count;
+      node->dn->info.i_prealloc_count = 0;
+      ext2_free_blocks (node->dn->info.i_prealloc_block, i);
+    }
 #endif
 }
 
-static int ext2_alloc_block (struct inode * inode, unsigned long goal)
+static int 
+ext2_alloc_block (struct inode *inode, unsigned long goal)
 {
 #ifdef EXT2FS_DEBUG
-	static unsigned long alloc_hits = 0, alloc_attempts = 0;
+  static unsigned long alloc_hits = 0, alloc_attempts = 0;
 #endif
-	unsigned long result;
-	char * bh;
+  unsigned long result;
+  char *bh;
 
-	wait_on_super (inode->i_sb);
+  wait_on_super (sblock);
 
 #ifdef EXT2_PREALLOCATE
-	if (inode->u.ext2_i.i_prealloc_count &&
-	    (goal == inode->u.ext2_i.i_prealloc_block ||
-	     goal + 1 == inode->u.ext2_i.i_prealloc_block))
-	{		
-		result = inode->u.ext2_i.i_prealloc_block++;
-		inode->u.ext2_i.i_prealloc_count--;
-		ext2_debug ("preallocation hit (%lu/%lu).\n",
-			    ++alloc_hits, ++alloc_attempts);
-
-		/* It doesn't matter if we block in getblk() since
-		   we have already atomically allocated the block, and
-		   are only clearing it now. */
-		if (!(bh = getblk (inode->i_sb->s_dev, result,
-				   inode->i_sb->s_blocksize))) {
-			ext2_error (inode->i_sb, "ext2_alloc_block",
-				    "cannot get block %lu", result);
-			return 0;
-		}
-		memset(bh, 0, inode->i_sb->s_blocksize);
-		brelse (bh);
-	} else {
-		ext2_discard_prealloc (inode);
-		ext2_debug ("preallocation miss (%lu/%lu).\n",
-			    alloc_hits, ++alloc_attempts);
-		if (S_ISREG(inode->i_mode))
-			result = ext2_new_block
-				(inode->i_sb, goal,
-				 &inode->u.ext2_i.i_prealloc_count,
-				 &inode->u.ext2_i.i_prealloc_block);
-		else
-			result = ext2_new_block (inode->i_sb, goal, 0, 0);
+  if (node->dn->info.i_prealloc_count &&
+      (goal == node->dn->info.i_prealloc_block ||
+       goal + 1 == node->dn->info.i_prealloc_block))
+    {
+      result = node->dn->info.i_prealloc_block++;
+      node->dn->info.i_prealloc_count--;
+      ext2_debug ("preallocation hit (%lu/%lu).\n",
+		  ++alloc_hits, ++alloc_attempts);
+
+      /* It doesn't matter if we block in getblk() since
+         we have already atomically allocated the block, and
+         are only clearing it now. */
+      if (!(bh = getblk (result, block_size)))
+	{
+	  ext2_error ("ext2_alloc_block", "cannot get block %lu", result);
+	  return 0;
 	}
+      memset (bh, 0, block_size);
+    }
+  else
+    {
+      ext2_discard_prealloc (inode);
+      ext2_debug ("preallocation miss (%lu/%lu).\n",
+		  alloc_hits, ++alloc_attempts);
+      if (S_ISREG (node->dn_stat.mode))
+	result = ext2_new_block
+	  (goal,
+	   &node->dn->info.i_prealloc_count,
+	   &node->dn->info.i_prealloc_block);
+      else
+	result = ext2_new_block (goal, 0, 0);
+    }
 #else
-	result = ext2_new_block (inode->i_sb, goal, 0, 0);
+  result = ext2_new_block (goal, 0, 0);
 #endif
 
-	return result;
+  return result;
 }
 
 
-int ext2_bmap (struct inode * inode, int block)
+int 
+ext2_bmap (struct inode *inode, int block)
 {
-	int i;
-	int addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
-
-	if (block < 0) {
-		ext2_warning (inode->i_sb, "ext2_bmap", "block < 0");
-		return 0;
-	}
-	if (block >= EXT2_NDIR_BLOCKS + addr_per_block +
-		     addr_per_block * addr_per_block +
-		     addr_per_block * addr_per_block * addr_per_block) {
-		ext2_warning (inode->i_sb, "ext2_bmap", "block > big");
-		return 0;
-	}
-	if (block < EXT2_NDIR_BLOCKS)
-		return inode_bmap (inode, block);
-	block -= EXT2_NDIR_BLOCKS;
-	if (block < addr_per_block) {
-		i = inode_bmap (inode, EXT2_IND_BLOCK);
-		if (!i)
-			return 0;
-		return block_bmap (bread (inode->i_dev, i,
-					  inode->i_sb->s_blocksize), block);
-	}
-	block -= addr_per_block;
-	if (block < addr_per_block * addr_per_block) {
-		i = inode_bmap (inode, EXT2_DIND_BLOCK);
-		if (!i)
-			return 0;
-		i = block_bmap (bread (inode->i_dev, i,
-				       inode->i_sb->s_blocksize),
-				block / addr_per_block);
-		if (!i)
-			return 0;
-		return block_bmap (bread (inode->i_dev, i,
-					  inode->i_sb->s_blocksize),
-				   block & (addr_per_block - 1));
-	}
-	block -= addr_per_block * addr_per_block;
-	i = inode_bmap (inode, EXT2_TIND_BLOCK);
-	if (!i)
-		return 0;
-	i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
-			block / (addr_per_block * addr_per_block));
-	if (!i)
-		return 0;
-	i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
-			(block / addr_per_block) & (addr_per_block - 1));
-	if (!i)
-		return 0;
-	return block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
-			   block & (addr_per_block - 1));
+  int i;
+  int addr_per_block = EXT2_ADDR_PER_BLOCK (sblock);
+
+  if (block < 0)
+    {
+      ext2_warning ("ext2_bmap", "block < 0");
+      return 0;
+    }
+  if (block >= EXT2_NDIR_BLOCKS + addr_per_block +
+      addr_per_block * addr_per_block +
+      addr_per_block * addr_per_block * addr_per_block)
+    {
+      ext2_warning ("ext2_bmap", "block > big");
+      return 0;
+    }
+  if (block < EXT2_NDIR_BLOCKS)
+    return inode_bmap (inode, block);
+  block -= EXT2_NDIR_BLOCKS;
+  if (block < addr_per_block)
+    {
+      i = inode_bmap (inode, EXT2_IND_BLOCK);
+      if (!i)
+	return 0;
+      return block_bmap (baddr (i), block);
+    }
+  block -= addr_per_block;
+  if (block < addr_per_block * addr_per_block)
+    {
+      i = inode_bmap (inode, EXT2_DIND_BLOCK);
+      if (!i)
+	return 0;
+      i = block_bmap (baddr (i), block / addr_per_block);
+      if (!i)
+	return 0;
+      return block_bmap (baddr (i), block & (addr_per_block - 1));
+    }
+  block -= addr_per_block * addr_per_block;
+  i = inode_bmap (inode, EXT2_TIND_BLOCK);
+  if (!i)
+    return 0;
+  i = block_bmap (baddr (i), block / (addr_per_block * addr_per_block));
+  if (!i)
+    return 0;
+  i = block_bmap (baddr (i), (block / addr_per_block) & (addr_per_block - 1));
+  if (!i)
+    return 0;
+  return block_bmap (baddr (i), block & (addr_per_block - 1));
 }
 
-static char * inode_getblk (struct inode * inode, int nr,
-					  int create, int new_block, int * err)
+static char *
+inode_getblk (struct inode *inode, int nr,
+	      int create, int new_block, int *err)
 {
-	u32 * p;
-	int tmp, goal = 0;
-	char * result;
-	int blocks = inode->i_sb->s_blocksize / 512;
+  u32 *p;
+  int tmp, goal = 0;
+  char *result;
+  int blocks = block_size / 512;
 
-	p = inode->u.ext2_i.i_data + nr;
+  p = node->dn->info.i_data + nr;
 repeat:
-	tmp = *p;
-	if (tmp) {
-		result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
-		if (tmp == *p)
-			return result;
-		brelse (result);
-		goto repeat;
-	}
-	if (!create || new_block >= 
-	    (current->rlim[RLIMIT_FSIZE].rlim_cur >>
-	     EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
-		*err = -EFBIG;
-		return NULL;
-	}
-	if (inode->u.ext2_i.i_next_alloc_block == new_block)
-		goal = inode->u.ext2_i.i_next_alloc_goal;
-
-	ext2_debug ("hint = %d,", goal);
-
-	if (!goal) {
-		for (tmp = nr - 1; tmp >= 0; tmp--) {
-			if (inode->u.ext2_i.i_data[tmp]) {
-				goal = inode->u.ext2_i.i_data[tmp];
-				break;
-			}
-		}
-		if (!goal)
-			goal = (inode->u.ext2_i.i_block_group * 
-				EXT2_BLOCKS_PER_GROUP(inode->i_sb)) +
-			       inode->i_sb->u.ext2_sb.s_es->s_first_data_block;
-	}
-
-	ext2_debug ("goal = %d.\n", goal);
-
-	tmp = ext2_alloc_block (inode, goal);
-	if (!tmp)
-		return NULL;
-	result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
-	if (*p) {
-		ext2_free_blocks (inode->i_sb, tmp, 1);
-		brelse (result);
-		goto repeat;
-	}
-	*p = tmp;
-	inode->u.ext2_i.i_next_alloc_block = new_block;
-	inode->u.ext2_i.i_next_alloc_goal = tmp;
-	inode->i_ctime = CURRENT_TIME;
-	inode->i_blocks += blocks;
-	if (IS_SYNC(inode) || inode->u.ext2_i.i_osync)
-		ext2_sync_inode (inode);
-	else
-		inode->i_dirt = 1;
+  tmp = *p;
+  if (tmp)
+    {
+      result = getblk (tmp, block_size);
+      if (tmp == *p)
 	return result;
+      goto repeat;
+    }
+  if (!create || new_block >=
+      (current->rlim[RLIMIT_FSIZE].rlim_cur >>
+       EXT2_BLOCK_SIZE_BITS (sblock)))
+    {
+      *err = -EFBIG;
+      return NULL;
+    }
+  if (node->dn->info.i_next_alloc_block == new_block)
+    goal = node->dn->info.i_next_alloc_goal;
+
+  ext2_debug ("hint = %d,", goal);
+
+  if (!goal)
+    {
+      for (tmp = nr - 1; tmp >= 0; tmp--)
+	{
+	  if (node->dn->info.i_data[tmp])
+	    {
+	      goal = node->dn->info.i_data[tmp];
+	      break;
+	    }
+	}
+      if (!goal)
+	goal =
+	  (node->dn->info.i_block_group * EXT2_BLOCKS_PER_GROUP (sblock))
+	  + sblock->s_first_data_block;
+    }
+
+  ext2_debug ("goal = %d.\n", goal);
+
+  tmp = ext2_alloc_block (inode, goal);
+  if (!tmp)
+    return NULL;
+  result = getblk (tmp, block_size);
+  if (*p)
+    {
+      ext2_free_blocks (tmp, 1);
+      goto repeat;
+    }
+  *p = tmp;
+  node->dn->info.i_next_alloc_block = new_block;
+  node->dn->info.i_next_alloc_goal = tmp;
+  node->dn_set_ctime = 1;
+  node->dn_stat.st_blocks += blocks;
+  if (IS_SYNC (inode) || node->dn->info.i_osync)
+    ext2_sync_inode (inode);
+  else
+    node->dirty = 1;
+  return result;
 }
 
-static char * block_getblk (struct inode * inode,
-					  char * bh, int nr,
-					  int create, int blocksize, 
-					  int new_block, int * err)
+static char *
+block_getblk (struct inode *inode,
+	      char *bh, int nr,
+	      int create, int blocksize,
+	      int new_block, int *err)
 {
-	int tmp, goal = 0;
-	u32 * p;
-	char * result;
-	int blocks = inode->i_sb->s_blocksize / 512;
-
-	if (!bh)
-		return NULL;
-	if (!bh->b_uptodate) {
-		ll_rw_block (READ, 1, &bh);
-		wait_on_buffer (bh);
-		if (!bh->b_uptodate) {
-			brelse (bh);
-			return NULL;
-		}
-	}
-	p = (u32 *) bh + nr;
+  int tmp, goal = 0;
+  u32 *p;
+  char *result;
+  int blocks = block_size / 512;
+
+  if (!bh)
+    return NULL;
+  if (!bh->b_uptodate)
+    {
+      ll_rw_block (READ, 1, &bh);
+      wait_on_buffer (bh);
+      if (!bh->b_uptodate)
+	return NULL;
+    }
+  p = (u32 *) bh + nr;
 repeat:
-	tmp = *p;
-	if (tmp) {
-		result = getblk (bh->b_dev, tmp, blocksize);
-		if (tmp == *p) {
-			brelse (bh);
-			return result;
-		}
-		brelse (result);
-		goto repeat;
-	}
-	if (!create || new_block >= 
-	    (current->rlim[RLIMIT_FSIZE].rlim_cur >> 
-	     EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
-		brelse (bh);
-		*err = -EFBIG;
-		return NULL;
-	}
-	if (inode->u.ext2_i.i_next_alloc_block == new_block)
-		goal = inode->u.ext2_i.i_next_alloc_goal;
-	if (!goal) {
-		for (tmp = nr - 1; tmp >= 0; tmp--) {
-			if (((u32 *) bh)[tmp]) {
-				goal = ((u32 *)bh)[tmp];
-				break;
-			}
-		}
-		if (!goal)
-			goal = bh->b_blocknr;
-	}
-	tmp = ext2_alloc_block (inode, goal);
-	if (!tmp) {
-		brelse (bh);
-		return NULL;
-	}
-	result = getblk (bh->b_dev, tmp, blocksize);
-	if (*p) {
-		ext2_free_blocks (inode->i_sb, tmp, 1);
-		brelse (result);
-		goto repeat;
-	}
-	*p = tmp;
-	mark_buffer_dirty(bh, 1);
-	if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) {
-		ll_rw_block (WRITE, 1, &bh);
-		wait_on_buffer (bh);
-	}
-	inode->i_ctime = CURRENT_TIME;
-	inode->i_blocks += blocks;
-	inode->i_dirt = 1;
-	inode->u.ext2_i.i_next_alloc_block = new_block;
-	inode->u.ext2_i.i_next_alloc_goal = tmp;
-	brelse (bh);
+  tmp = *p;
+  if (tmp)
+    {
+      result = getblk (bh->b_dev, tmp, blocksize);
+      if (tmp == *p)
 	return result;
+      goto repeat;
+    }
+  if (!create || new_block >=
+      (current->rlim[RLIMIT_FSIZE].rlim_cur >>
+       EXT2_BLOCK_SIZE_BITS (sblock)))
+    {
+      *err = -EFBIG;
+      return NULL;
+    }
+  if (node->dn->info.i_next_alloc_block == new_block)
+    goal = node->dn->info.i_next_alloc_goal;
+  if (!goal)
+    {
+      for (tmp = nr - 1; tmp >= 0; tmp--)
+	{
+	  if (((u32 *) bh)[tmp])
+	    {
+	      goal = ((u32 *) bh)[tmp];
+	      break;
+	    }
+	}
+      if (!goal)
+	goal = bh->b_blocknr;
+    }
+  tmp = ext2_alloc_block (inode, goal);
+  if (!tmp)
+    return NULL;
+
+  result = getblk (bh->b_dev, tmp, blocksize);
+  if (*p)
+    {
+      ext2_free_blocks (tmp, 1);
+      goto repeat;
+    }
+  *p = tmp;
+  mark_buffer_dirty (bh, 1);
+  if (IS_SYNC (inode) || node->dn->info.i_osync)
+    {
+      ll_rw_block (WRITE, 1, &bh);
+      wait_on_buffer (bh);
+    }
+  node->dn_set_ctime = 1;
+  node->dn_stat.st_blocks += blocks;
+  node->dirty = 1;
+  node->dn->info.i_next_alloc_block = new_block;
+  node->dn->info.i_next_alloc_goal = tmp;
+
+  return result;
 }
 
-static int block_getcluster (struct inode * inode, char * bh,
-					  int nr,
-					  int blocksize)
+static int 
+block_getcluster (struct inode *inode, char *bh,
+		  int nr,
+		  int blocksize)
 {
-	u32 * p;
-	int firstblock = 0;
-	int result = 0;
-	int i;
-
-	/* Check to see if clustering possible here. */
-
-	if(!bh) return 0;
-
-	if(nr % (PAGE_SIZE / inode->i_sb->s_blocksize) != 0) goto out;
-	if(nr + 3 > EXT2_ADDR_PER_BLOCK(inode->i_sb)) goto out;
-
-	for(i=0; i< (PAGE_SIZE / inode->i_sb->s_blocksize); i++) {
-	  p = (u32 *) bh + nr + i;
-	  
-	  /* All blocks in cluster must already be allocated */
-	  if(*p == 0) goto out;
-	  
-	  /* See if aligned correctly */
-	  if(i==0) firstblock = *p;
-	  else if(*p != firstblock + i) goto out;
-	}
-	
-	p = (u32 *) bh + nr;
-	result = generate_cluster(bh->b_dev, (int *) p, blocksize);
+  u32 *p;
+  int firstblock = 0;
+  int result = 0;
+  int i;
 
-      out:
-	brelse(bh);
-	return result;
-}
+  /* Check to see if clustering possible here. */
 
-char * ext2_getblk (struct inode * inode, long block,
-				  int create, int * err)
-{
-	char * bh;
-	unsigned long b;
-	unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
-
-	*err = -EIO;
-	if (block < 0) {
-		ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
-		return NULL;
-	}
-	if (block > EXT2_NDIR_BLOCKS + addr_per_block  +
-		    addr_per_block * addr_per_block +
-		    addr_per_block * addr_per_block * addr_per_block) {
-		ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
-		return NULL;
-	}
-	/*
-	 * If this is a sequential block allocation, set the next_alloc_block
-	 * to this block now so that all the indblock and data block
-	 * allocations use the same goal zone
-	 */
-
-	ext2_debug ("block %lu, next %lu, goal %lu.\n", block, 
-		    inode->u.ext2_i.i_next_alloc_block,
-		    inode->u.ext2_i.i_next_alloc_goal);
-
-	if (block == inode->u.ext2_i.i_next_alloc_block + 1) {
-		inode->u.ext2_i.i_next_alloc_block++;
-		inode->u.ext2_i.i_next_alloc_goal++;
-	}
+  if (!bh)
+    return 0;
 
-	*err = -ENOSPC;
-	b = block;
-	if (block < EXT2_NDIR_BLOCKS)
-		return inode_getblk (inode, block, create, b, err);
-	block -= EXT2_NDIR_BLOCKS;
-	if (block < addr_per_block) {
-		bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, err);
-		return block_getblk (inode, bh, block, create,
-				     inode->i_sb->s_blocksize, b, err);
-	}
-	block -= addr_per_block;
-	if (block < addr_per_block * addr_per_block) {
-		bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, err);
-		bh = block_getblk (inode, bh, block / addr_per_block, create,
-				   inode->i_sb->s_blocksize, b, err);
-		return block_getblk (inode, bh, block & (addr_per_block - 1),
-				     create, inode->i_sb->s_blocksize, b, err);
-	}
-	block -= addr_per_block * addr_per_block;
-	bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, err);
-	bh = block_getblk (inode, bh, block/(addr_per_block * addr_per_block),
-			   create, inode->i_sb->s_blocksize, b, err);
-	bh = block_getblk (inode, bh, (block/addr_per_block) & (addr_per_block - 1),
-			   create, inode->i_sb->s_blocksize, b, err);
-	return block_getblk (inode, bh, block & (addr_per_block - 1), create,
-			     inode->i_sb->s_blocksize, b, err);
-}
+  if (nr % (PAGE_SIZE / block_size) != 0)
+    goto out;
+  if (nr + 3 > EXT2_ADDR_PER_BLOCK (sblock))
+    goto out;
 
-int ext2_getcluster (struct inode * inode, long block)
-{
-	char * bh;
-	int err, create;
-	unsigned long b;
-	unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
-
-	create = 0;
-	err = -EIO;
-	if (block < 0) {
-		ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
-		return 0;
-	}
-	if (block > EXT2_NDIR_BLOCKS + addr_per_block  +
-		    addr_per_block * addr_per_block +
-		    addr_per_block * addr_per_block * addr_per_block) {
-		ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
-		return 0;
-	}
+  for (i = 0; i < (PAGE_SIZE / block_size); i++)
+    {
+      p = (u32 *) bh + nr + i;
 
-	err = -ENOSPC;
-	b = block;
-	if (block < EXT2_NDIR_BLOCKS) return 0;
+      /* All blocks in cluster must already be allocated */
+      if (*p == 0)
+	goto out;
 
-	block -= EXT2_NDIR_BLOCKS;
+      /* See if aligned correctly */
+      if (i == 0)
+	firstblock = *p;
+      else if (*p != firstblock + i)
+	goto out;
+    }
 
-	if (block < addr_per_block) {
-		bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, &err);
-		return block_getcluster (inode, bh, block, 
-					 inode->i_sb->s_blocksize);
-	}
-	block -= addr_per_block;
-	if (block < addr_per_block * addr_per_block) {
-		bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, &err);
-		bh = block_getblk (inode, bh, block / addr_per_block, create,
-				   inode->i_sb->s_blocksize, b, &err);
-		return block_getcluster (inode, bh, block & (addr_per_block - 1),
-				     inode->i_sb->s_blocksize);
-	}
-	block -= addr_per_block * addr_per_block;
-	bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, &err);
-	bh = block_getblk (inode, bh, block/(addr_per_block * addr_per_block),
-			   create, inode->i_sb->s_blocksize, b, &err);
-	bh = block_getblk (inode, bh, (block/addr_per_block) & (addr_per_block - 1),
-			   create, inode->i_sb->s_blocksize, b, &err);
-	return block_getcluster (inode, bh, block & (addr_per_block - 1),
-				 inode->i_sb->s_blocksize);
+  p = (u32 *) bh + nr;
+  result = generate_cluster (bh->b_dev, (int *) p, blocksize);
+
+out:
+  return result;
+}
+
+char *
+ext2_getblk (struct inode *inode, long block,
+	     int create, int *err)
+{
+  char *bh;
+  unsigned long b;
+  unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK (sblock);
+
+  *err = -EIO;
+  if (block < 0)
+    {
+      ext2_warning ("ext2_getblk", "block < 0");
+      return NULL;
+    }
+  if (block > EXT2_NDIR_BLOCKS + addr_per_block +
+      addr_per_block * addr_per_block +
+      addr_per_block * addr_per_block * addr_per_block)
+    {
+      ext2_warning ("ext2_getblk", "block > big");
+      return NULL;
+    }
+  /*
+     * If this is a sequential block allocation, set the next_alloc_block
+     * to this block now so that all the indblock and data block
+     * allocations use the same goal zone
+   */
+
+  ext2_debug ("block %lu, next %lu, goal %lu.\n", block,
+	      node->dn->info.i_next_alloc_block,
+	      node->dn->info.i_next_alloc_goal);
+
+  if (block == node->dn->info.i_next_alloc_block + 1)
+    {
+      node->dn->info.i_next_alloc_block++;
+      node->dn->info.i_next_alloc_goal++;
+    }
+
+  *err = -ENOSPC;
+  b = block;
+  if (block < EXT2_NDIR_BLOCKS)
+    return inode_getblk (inode, block, create, b, err);
+  block -= EXT2_NDIR_BLOCKS;
+  if (block < addr_per_block)
+    {
+      bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, err);
+      return block_getblk (inode, bh, block, create,
+			   block_size, b, err);
+    }
+  block -= addr_per_block;
+  if (block < addr_per_block * addr_per_block)
+    {
+      bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, err);
+      bh = block_getblk (inode, bh, block / addr_per_block, create,
+			 block_size, b, err);
+      return block_getblk (inode, bh, block & (addr_per_block - 1),
+			   create, block_size, b, err);
+    }
+  block -= addr_per_block * addr_per_block;
+  bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, err);
+  bh = block_getblk (inode, bh, block / (addr_per_block * addr_per_block),
+		     create, block_size, b, err);
+  bh = block_getblk (inode, bh, (block / addr_per_block) & (addr_per_block - 1),
+		     create, block_size, b, err);
+  return block_getblk (inode, bh, block & (addr_per_block - 1), create,
+		       block_size, b, err);
+}
+
+int 
+ext2_getcluster (struct inode *inode, long block)
+{
+  char *bh;
+  int err, create;
+  unsigned long b;
+  unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK (sblock);
+
+  create = 0;
+  err = -EIO;
+  if (block < 0)
+    {
+      ext2_warning ("ext2_getblk", "block < 0");
+      return 0;
+    }
+  if (block > EXT2_NDIR_BLOCKS + addr_per_block +
+      addr_per_block * addr_per_block +
+      addr_per_block * addr_per_block * addr_per_block)
+    {
+      ext2_warning ("ext2_getblk", "block > big");
+      return 0;
+    }
+
+  err = -ENOSPC;
+  b = block;
+  if (block < EXT2_NDIR_BLOCKS)
+    return 0;
+
+  block -= EXT2_NDIR_BLOCKS;
+
+  if (block < addr_per_block)
+    {
+      bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, &err);
+      return block_getcluster (inode, bh, block,
+			       block_size);
+    }
+  block -= addr_per_block;
+  if (block < addr_per_block * addr_per_block)
+    {
+      bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, &err);
+      bh = block_getblk (inode, bh, block / addr_per_block, create,
+			 block_size, b, &err);
+      return block_getcluster (inode, bh, block & (addr_per_block - 1),
+			       block_size);
+    }
+  block -= addr_per_block * addr_per_block;
+  bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, &err);
+  bh = block_getblk (inode, bh, block / (addr_per_block * addr_per_block),
+		     create, block_size, b, &err);
+  bh = block_getblk (inode, bh, (block / addr_per_block) & (addr_per_block - 1),
+		     create, block_size, b, &err);
+  return block_getcluster (inode, bh, block & (addr_per_block - 1),
+			   block_size);
 }