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Commit c83f8eff authored by Josef Bacik's avatar Josef Bacik Committed by David Sterba
Browse files

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: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent d555b6c3

fs/btrfs/extent-tree.c

+2 −0
Original line number Diff line number Diff line
@@ -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) {

include/trace/events/btrfs.h

+40 −0
Original line number Diff line number Diff line
@@ -440,6 +440,46 @@ TRACE_EVENT(btrfs_sync_fs, 
	TP_printk("wait = %d", __entry->wait)

);



TRACE_EVENT(btrfs_add_block_group,



	TP_PROTO(struct btrfs_fs_info *fs_info,

		 struct btrfs_block_group_cache *block_group, int create),



	TP_ARGS(fs_info, block_group, create),



	TP_STRUCT__entry(

		__array(	u8,	fsid,	BTRFS_UUID_SIZE	)

		__field(	u64,	offset			)

		__field(	u64,	size			)

		__field(	u64,	flags			)

		__field(	u64,	bytes_used		)

		__field(	u64,	bytes_super		)

		__field(	int,	create			)

	),



	TP_fast_assign(

		memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);

		__entry->offset		= block_group->key.objectid;

		__entry->size		= block_group->key.offset;

		__entry->flags		= block_group->flags;

		__entry->bytes_used	=

			btrfs_block_group_used(&block_group->item);

		__entry->bytes_super	= block_group->bytes_super;

		__entry->create		= create;

	),



	TP_printk("%pU: block_group offset = %llu, size = %llu, "

		  "flags = %llu(%s), bytes_used = %llu, bytes_super = %llu, "

		  "create = %d", __entry->fsid,

		  (unsigned long long)__entry->offset,

		  (unsigned long long)__entry->size,

		  (unsigned long long)__entry->flags,

		  __print_flags((unsigned long)__entry->flags, "|",

				BTRFS_GROUP_FLAGS),

		  (unsigned long long)__entry->bytes_used,

		  (unsigned long long)__entry->bytes_super, __entry->create)

);



#define show_ref_action(action)						\

	__print_symbolic(action,					\

		{ BTRFS_ADD_DELAYED_REF,    "ADD_DELAYED_REF" },	\