[PATCH] ufs: missed brelse and wrong baseblk

This patch fixes two bugs, which introduced by previous patches:

1) Missed "brelse"

2) Sometimes "baseblk" may be wrongly calculated, if i_size is equal to
   zero, which lead infinite cycle in "mpage_writepages".

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

diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index ac709e7..99d8818 100644 (file)
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -269,20 +269,17 @@ out:
  * We can come here from ufs_writepage or ufs_prepare_write,
  * locked_page is argument of these functions, so we already lock it.
  */
-static void ufs_change_blocknr(struct inode *inode, unsigned int count,
-                              unsigned int oldb, unsigned int newb,
-                              struct page *locked_page)
+static void ufs_change_blocknr(struct inode *inode, unsigned int baseblk,
+                              unsigned int count, unsigned int oldb,
+                              unsigned int newb, struct page *locked_page)
 {
        unsigned int blk_per_page = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits);
-       sector_t baseblk;
        struct address_space *mapping = inode->i_mapping;
        pgoff_t index, cur_index = locked_page->index;
        unsigned int i, j;
        struct page *page;
        struct buffer_head *head, *bh;
 
-       baseblk = ((i_size_read(inode) - 1) >> inode->i_blkbits) + 1 - count;
-
        UFSD("ENTER, ino %lu, count %u, oldb %u, newb %u\n",
              inode->i_ino, count, oldb, newb);
 
@@ -439,7 +436,8 @@ unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
        }
        result = ufs_alloc_fragments (inode, cgno, goal, request, err);
        if (result) {
-               ufs_change_blocknr(inode, oldcount, tmp, result, locked_page);
+               ufs_change_blocknr(inode, fragment - oldcount, oldcount, tmp,
+                                  result, locked_page);
 
                *p = cpu_to_fs32(sb, result);
                *err = 0;

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 7228204..01c5f19 100644 (file)
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -175,6 +175,7 @@ ufs_clear_frags(struct inode *inode, sector_t beg,
        for (++beg; beg < end; ++beg) {
                bh = sb_getblk(inode->i_sb, beg);
                ufs_clear_frag(inode, bh);
+               brelse(bh);
        }
        return res;
 }