Btrfs: add tracepoint for adding block groups

I'm writing a tool to visualize the enospc system inside btrfs, I need this
tracepoint in order to keep track of the block groups in the system.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a1355a33e7e9..aae7b04afa9f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -9994,6 +9994,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
                         goto error;
                 }
 
+                trace_btrfs_add_block_group(root->fs_info, cache, 0);
                 ret = update_space_info(info, cache->flags, found_key.offset,
                                         btrfs_block_group_used(&cache->item),
                                         cache->bytes_super, &space_info);
@@ -10164,6 +10165,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
          * Now that our block group has its ->space_info set and is inserted in
          * the rbtree, update the space info's counters.
          */
+        trace_btrfs_add_block_group(root->fs_info, cache, 1);
         ret = update_space_info(root->fs_info, cache->flags, size, bytes_used,
                                 cache->bytes_super, &cache->space_info);
         if (ret) {