Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

[powerpc.git] / fs / ext2 / dir.c

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index d672aa9..e89bfc8 100644 (file)
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -159,8 +159,7 @@ fail:
 static struct page * ext2_get_page(struct inode *dir, unsigned long n)
 {
        struct address_space *mapping = dir->i_mapping;
-       struct page *page = read_cache_page(mapping, n,
-                               (filler_t*)mapping->a_ops->readpage, NULL);
+       struct page *page = read_mapping_page(mapping, n, NULL);
        if (!IS_ERR(page)) {
                wait_on_page_locked(page);
                kmap(page);
@@ -249,7 +248,7 @@ static int
 ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
 {
        loff_t pos = filp->f_pos;
-       struct inode *inode = filp->f_dentry->d_inode;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        struct super_block *sb = inode->i_sb;
        unsigned int offset = pos & ~PAGE_CACHE_MASK;
        unsigned long n = pos >> PAGE_CACHE_SHIFT;
@@ -369,6 +368,14 @@ struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir,
                }
                if (++n >= npages)
                        n = 0;
+               /* next page is past the blocks we've got */
+               if (unlikely(n > (dir->i_blocks >> (PAGE_CACHE_SHIFT - 9)))) {
+                       ext2_error(dir->i_sb, __FUNCTION__,
+                               "dir %lu size %lld exceeds block count %llu",
+                               dir->i_ino, dir->i_size,
+                               (unsigned long long)dir->i_blocks);
+                       goto out;
+               }
        } while (n != start);
 out:
        return NULL;
@@ -400,8 +407,7 @@ ino_t ext2_inode_by_name(struct inode * dir, struct dentry *dentry)
        de = ext2_find_entry (dir, dentry, &page);
        if (de) {
                res = le32_to_cpu(de->inode);
-               kunmap(page);
-               page_cache_release(page);
+               ext2_put_page(page);
        }
        return res;
 }
@@ -663,5 +669,8 @@ const struct file_operations ext2_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = ext2_readdir,
        .ioctl          = ext2_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = ext2_compat_ioctl,
+#endif
        .fsync          = ext2_sync_file,
 };