[PATCH] ufs: right block allocation

* After block allocation, we map it on the same "address" as 8 others
  blocks

* We nullify block several times: once in ufs/block.c and once in
  block_*write_full_page, and use different "caches" for this.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 18 insertions, 12 deletions

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 3c3f62ce2ad9..2b2366360e5a 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -161,6 +161,17 @@ out:
         return ret;
 }
 
+static void ufs_clear_block(struct inode *inode, struct buffer_head *bh)
+{
+        lock_buffer(bh);
+        memset(bh->b_data, 0, inode->i_sb->s_blocksize);
+        set_buffer_uptodate(bh);
+        mark_buffer_dirty(bh);
+        unlock_buffer(bh);
+        if (IS_SYNC(inode))
+                sync_dirty_buffer(bh);
+}
+
 static struct buffer_head * ufs_inode_getfrag (struct inode *inode,
         unsigned int fragment, unsigned int new_fragment,
         unsigned int required, int *err, int metadata, long *phys, int *new)
@@ -204,7 +215,7 @@ repeat:
                         brelse (result);
                         goto repeat;
                 } else {
-                        *phys = tmp;
+                        *phys = tmp + blockoff;
                         return NULL;
                 }
         }
@@ -259,14 +270,11 @@ repeat:
                 return NULL;
         }
 
-        /* The nullification of framgents done in ufs/balloc.c is
-         * something I don't have the stomache to move into here right
-         * now. -DaveM
-         */
         if (metadata) {
                 result = sb_getblk(inode->i_sb, tmp + blockoff);
+                ufs_clear_block(inode, result);
         } else {
-                *phys = tmp;
+                *phys = tmp + blockoff;
                 result = NULL;
                 *err = 0;
                 *new = 1;
@@ -333,7 +341,7 @@ repeat:
                         brelse (result);
                         goto repeat;
                 } else {
-                        *phys = tmp;
+                        *phys = tmp + blockoff;
                         goto out;
                 }
         }
@@ -349,14 +357,12 @@ repeat:
                 goto out;
         }               
 
-        /* The nullification of framgents done in ufs/balloc.c is
-         * something I don't have the stomache to move into here right
-         * now. -DaveM
-         */
+
         if (metadata) {
                 result = sb_getblk(sb, tmp + blockoff);
+                ufs_clear_block(inode, result);
         } else {
-                *phys = tmp;
+                *phys = tmp + blockoff;
                 *new = 1;
         }