[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>

2 files changed, 18 insertions, 27 deletions

diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index 3ada9dcf55b..cc0c8f15d8f 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -223,18 +223,6 @@ failed:
 }
 
 
-
-#define NULLIFY_FRAGMENTS \
-        for (i = oldcount; i < newcount; i++) { \
-                bh = sb_getblk(sb, result + i); \
-                memset (bh->b_data, 0, sb->s_blocksize); \
-                set_buffer_uptodate(bh); \
-                mark_buffer_dirty (bh); \
-                if (IS_SYNC(inode)) \
-                        sync_dirty_buffer(bh); \
-                brelse (bh); \
-        }
-
 unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment,
         unsigned goal, unsigned count, int * err )
 {
@@ -312,7 +300,6 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment,
                         *err = 0;
                         inode->i_blocks += count << uspi->s_nspfshift;
                         UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
-                        NULLIFY_FRAGMENTS
                 }
                 unlock_super(sb);
                 UFSD(("EXIT, result %u\n", result))
@@ -327,7 +314,6 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment,
                 *err = 0;
                 inode->i_blocks += count << uspi->s_nspfshift;
                 UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
-                NULLIFY_FRAGMENTS
                 unlock_super(sb);
                 UFSD(("EXIT, result %u\n", result))
                 return result;
@@ -379,7 +365,6 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment,
                 *err = 0;
                 inode->i_blocks += count << uspi->s_nspfshift;
                 UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
-                NULLIFY_FRAGMENTS
                 unlock_super(sb);
                 if (newcount < request)
                         ufs_free_fragments (inode, result + newcount, request - newcount);
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 3c3f62ce2ad..2b2366360e5 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;
         }