Btrfs: Fix extent_buffer usage when nodesize != leafsize

[linux-2.6-block.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index a481b970608c4a8d08edbc08fbcc82c166c73328..0338f8fd382d989748647f7c24ab079bc6bed7a1 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -197,9 +197,23 @@ int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
        if (found_start != start) {
                printk("warning: eb start incorrect %Lu buffer %Lu len %lu\n",
                       start, found_start, len);
+               WARN_ON(1);
+               goto err;
+       }
+       if (eb->first_page != page) {
+               printk("bad first page %lu %lu\n", eb->first_page->index,
+                      page->index);
+               WARN_ON(1);
+               goto err;
+       }
+       if (!PageUptodate(page)) {
+               printk("csum not up to date page %lu\n", page->index);
+               WARN_ON(1);
+               goto err;
        }
        found_level = btrfs_header_level(eb);
        csum_tree_block(root, eb, 0);
+err:
        free_extent_buffer(eb);
 out:
        return 0;
@@ -368,7 +382,10 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                     struct extent_buffer *buf)
 {
        struct inode *btree_inode = root->fs_info->btree_inode;
-       clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf);
+       if (btrfs_header_generation(buf) ==
+           root->fs_info->running_transaction->transid)
+               clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree,
+                                         buf);
        return 0;
 }
 
@@ -897,8 +914,11 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 
 void btrfs_throttle(struct btrfs_root *root)
 {
-       if (root->fs_info->throttles)
-               congestion_wait(WRITE, HZ/10);
+       struct backing_dev_info *bdi;
+
+       bdi = root->fs_info->sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
+       if (root->fs_info->throttles && bdi_write_congested(bdi))
+               congestion_wait(WRITE, HZ/20);
 }
 
 void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)