ldiskfs/kernel_patches/patches/ext3-lookup-dotdot-2.6.9.patch

   1 Index: linux-2.6.9-full/fs/ext3/namei.c
   2 ===================================================================
   3 --- linux-2.6.9-full.orig/fs/ext3/namei.c       2006-05-06 01:21:10.000000000 +0400
   4 +++ linux-2.6.9-full/fs/ext3/namei.c    2006-05-06 01:29:30.000000000 +0400
   5 @@ -1003,6 +1003,38 @@ static struct dentry *ext3_lookup(struct
   6
   7                         return ERR_PTR(-EACCES);
   8         }
   9 +       /* ".." shouldn't go into dcache to preserve dcache hierarchy
  10 +        * otherwise we'll get parent being a child of actual child.
  11 +        * see bug 10458 for details -bzzz */
  12 +       if (inode && (dentry->d_name.name[0] == '.' && (dentry->d_name.len == 1 ||
  13 +               (dentry->d_name.len == 2 && dentry->d_name.name[1] == '.')))) {
  14 +               struct dentry *tmp, *goal = NULL;
  15 +               struct list_head *lp;
  16 +
  17 +               /* first, look for an existing dentry - any one is good */
  18 +               spin_lock(&dcache_lock);
  19 +               list_for_each(lp, &inode->i_dentry) {
  20 +                       tmp = list_entry(lp, struct dentry, d_alias);
  21 +                       goal = tmp;
  22 +                       dget_locked(goal);
  23 +                       break;
  24 +               }
  25 +               if (goal == NULL) {
  26 +                       /* there is no alias, we need to make current dentry:
  27 +                        *  a) inaccessible for __d_lookup()
  28 +                        *  b) inaccessible for iopen */
  29 +                       J_ASSERT(list_empty(&dentry->d_alias));
  30 +                       dentry->d_flags |= DCACHE_NFSFS_RENAMED;
  31 +                       /* this is d_instantiate() ... */
  32 +                       list_add(&dentry->d_alias, &inode->i_dentry);
  33 +                       dentry->d_inode = inode;
  34 +               }
  35 +               spin_unlock(&dcache_lock);
  36 +               if (goal)
  37 +                       iput(inode);
  38 +               return goal;
  39 +       }
  40 +
  41         return d_splice_alias(inode, dentry);
  42  }
  43