ext2fs: use fat nodes

Use `diskfs_make_node_alloc' to allocate both the node and the
disknode in a continuous chunk of memory.  This increases locality and
reduces the pressure on the memory allocator.

* ext2fs/inode.c: Use `diskfs_node_disknode' to access the disknode.
(diskfs_cached_lookup): Use `diskfs_make_node_alloc' to allocate the
node.
(diskfs_node_norefs): Only free `np'.
* ext2fs/dir.c: Use `diskfs_node_disknode' to access the disknode.
* ext2fs/ext2fs.h: Likewise.
* ext2fs/getblk.c: Likewise.
* ext2fs/ialloc.c: Likewise.
* ext2fs/pager.c: Likewise.
* ext2fs/truncate.c: Likewise.

1 files changed, 7 insertions, 6 deletions

diff --git a/ext2fs/ialloc.c b/ext2fs/ialloc.c
index 52212d59..7cfc4f32 100644
--- a/ext2fs/ialloc.c
+++ b/ext2fs/ialloc.c
@@ -316,14 +316,14 @@ diskfs_alloc_node (struct node *dir, mode_t mode, struct node **node)
     }
   /* Zero out the block pointers in case there's some noise left on disk.  */
   for (block = 0; block < EXT2_N_BLOCKS; block++)
-    if (np->dn->info.i_data[block] != 0)
+    if (diskfs_node_disknode (np)->info.i_data[block] != 0)
       {
-	np->dn->info.i_data[block] = 0;
+	diskfs_node_disknode (np)->info.i_data[block] = 0;
 	np->dn_set_ctime = 1;
       }
-  if (np->dn->info_i_translator != 0)
+  if (diskfs_node_disknode (np)->info_i_translator != 0)
     {
-      np->dn->info_i_translator = 0;
+      diskfs_node_disknode (np)->info_i_translator = 0;
       np->dn_set_ctime = 1;
     }
   st->st_mode &= ~S_IPTRANS;
@@ -335,8 +335,9 @@ diskfs_alloc_node (struct node *dir, mode_t mode, struct node **node)
     }
 
   /* Propagate initial inode flags from the directory, as Linux does.  */
-  np->dn->info.i_flags =
-    ext2_mask_flags(mode, dir->dn->info.i_flags & EXT2_FL_INHERITED);
+  diskfs_node_disknode (np)->info.i_flags =
+    ext2_mask_flags(mode,
+	       diskfs_node_disknode (dir)->info.i_flags & EXT2_FL_INHERITED);
 
   st->st_flags = 0;