Btrfs: do less aggressive btree readahead

[safe/jmp/linux-2.6] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2e25d69..288c2cd 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4156,6 +4156,12 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
        return -EINVAL;
 }
 
+static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+               __u64 start, __u64 len)
+{
+       return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent);
+}
+
 int btrfs_readpage(struct file *file, struct page *page)
 {
        struct extent_io_tree *tree;
@@ -5021,6 +5027,7 @@ static struct inode_operations btrfs_file_inode_operations = {
        .removexattr    = btrfs_removexattr,
        .permission     = btrfs_permission,
        .fallocate      = btrfs_fallocate,
+       .fiemap         = btrfs_fiemap,
 };
 static struct inode_operations btrfs_special_inode_operations = {
        .getattr        = btrfs_getattr,