On 02/11/2010 03:43 PM, Shaohua Li wrote:
> My test do: fallocate a big file and do write. The file is 512M, but
> after file write is done btrfs-debug-tree shows:
> item 6 key (257 EXTENT_DATA 0) itemoff 3516 itemsize 53
> extent data disk byte 1103101952 nr 536870912
> extent data offset 0 nr 399634432 ram 536870912
> extent compression 0
> Looks like a regression introducted by
> 6c7d54ac87f338c479d9729e8392eca3f76e11e1, where we set wrong slot.
>
> Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
>
> diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
> index 9d08096..6ed434a 100644
> --- a/fs/btrfs/file.c
> +++ b/fs/btrfs/file.c
> @@ -720,13 +720,15 @@ again:
> inode->i_ino, orig_offset);
> BUG_ON(ret);
> }
> - fi = btrfs_item_ptr(leaf, path->slots[0],
> - struct btrfs_file_extent_item);
> if (del_nr == 0) {
> + fi = btrfs_item_ptr(leaf, path->slots[0],
> + struct btrfs_file_extent_item);
> btrfs_set_file_extent_type(leaf, fi,
> BTRFS_FILE_EXTENT_REG);
> btrfs_mark_buffer_dirty(leaf);
> } else {
> + fi = btrfs_item_ptr(leaf, del_slot - 1,
> + struct btrfs_file_extent_item);
> btrfs_set_file_extent_type(leaf, fi,
> BTRFS_FILE_EXTENT_REG);
> btrfs_set_file_extent_num_bytes(leaf, fi,
Acked-by: Yan Zheng <zheng.yan@xxxxxxxxxx>
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