Commit 81fb6f77 authored by Qu Wenruo's avatar Qu Wenruo Committed by Chris Mason
Browse files

btrfs: qgroup: Add new trace point for qgroup data reserve 



Now each qgroup reserve for data will has its ftrace event for better
debugging.

Signed-off-by: default avatarQu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent b9d0b389

fs/btrfs/qgroup.c

+9 −2
Original line number Diff line number Diff line
@@ -2516,10 +2516,12 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len) 


	changeset.bytes_changed = 0;

	changeset.range_changed = ulist_alloc(GFP_NOFS);



	ret = set_record_extent_bits(&BTRFS_I(inode)->io_tree, start,

			start + len -1, EXTENT_QGROUP_RESERVED, GFP_NOFS,

			&changeset);

	trace_btrfs_qgroup_reserve_data(inode, start, len,

					changeset.bytes_changed,

					QGROUP_RESERVE);

	if (ret < 0)

		goto cleanup;

	ret = qgroup_reserve(root, changeset.bytes_changed);
@@ -2544,6 +2546,7 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len, 
				       int free)

{

	struct extent_changeset changeset;

	int trace_op = QGROUP_RELEASE;

	int ret;



	changeset.bytes_changed = 0;
@@ -2557,8 +2560,12 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len, 
	if (ret < 0)

		goto out;



	if (free)

	if (free) {

		qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed);

		trace_op = QGROUP_FREE;

	}

	trace_btrfs_qgroup_release_data(inode, start, len,

					changeset.bytes_changed, trace_op);

out:

	ulist_free(changeset.range_changed);

	return ret;

fs/btrfs/qgroup.h

+8 −0
Original line number Diff line number Diff line
@@ -33,6 +33,13 @@ struct btrfs_qgroup_extent_record { 
	struct ulist *old_roots;

};



/*

 * For qgroup event trace points only

 */

#define QGROUP_RESERVE		(1<<0)

#define QGROUP_RELEASE		(1<<1)

#define QGROUP_FREE		(1<<2)



int btrfs_quota_enable(struct btrfs_trans_handle *trans,

		       struct btrfs_fs_info *fs_info);

int btrfs_quota_disable(struct btrfs_trans_handle *trans,
@@ -81,6 +88,7 @@ static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info, 
						 u64 ref_root, u64 num_bytes)

{

	btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);

	trace_btrfs_qgroup_free_delayed_ref(ref_root, num_bytes);

}

void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);

include/trace/events/btrfs.h

+113 −0
Original line number Diff line number Diff line
@@ -1117,6 +1117,119 @@ DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy, 
	TP_ARGS(wq)

);



DECLARE_EVENT_CLASS(btrfs__qgroup_data_map,



	TP_PROTO(struct inode *inode, u64 free_reserved),



	TP_ARGS(inode, free_reserved),



	TP_STRUCT__entry(

		__field(	u64,		rootid		)

		__field(	unsigned long,	ino		)

		__field(	u64,		free_reserved	)

	),



	TP_fast_assign(

		__entry->rootid		=	BTRFS_I(inode)->root->objectid;

		__entry->ino		=	inode->i_ino;

		__entry->free_reserved	=	free_reserved;

	),



	TP_printk("rootid=%llu, ino=%lu, free_reserved=%llu",

		  __entry->rootid, __entry->ino, __entry->free_reserved)

);



DEFINE_EVENT(btrfs__qgroup_data_map, btrfs_qgroup_init_data_rsv_map,



	TP_PROTO(struct inode *inode, u64 free_reserved),



	TP_ARGS(inode, free_reserved)

);



DEFINE_EVENT(btrfs__qgroup_data_map, btrfs_qgroup_free_data_rsv_map,



	TP_PROTO(struct inode *inode, u64 free_reserved),



	TP_ARGS(inode, free_reserved)

);



#define BTRFS_QGROUP_OPERATIONS				\

	{ QGROUP_RESERVE,	"reserve"	},	\

	{ QGROUP_RELEASE,	"release"	},	\

	{ QGROUP_FREE,		"free"		}



DECLARE_EVENT_CLASS(btrfs__qgroup_rsv_data,



	TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),



	TP_ARGS(inode, start, len, reserved, op),



	TP_STRUCT__entry(

		__field(	u64,		rootid		)

		__field(	unsigned long,	ino		)

		__field(	u64,		start		)

		__field(	u64,		len		)

		__field(	u64,		reserved	)

		__field(	int,		op		)

	),



	TP_fast_assign(

		__entry->rootid		= BTRFS_I(inode)->root->objectid;

		__entry->ino		= inode->i_ino;

		__entry->start		= start;

		__entry->len		= len;

		__entry->reserved	= reserved;

		__entry->op		= op;

	),



	TP_printk("root=%llu, ino=%lu, start=%llu, len=%llu, reserved=%llu, op=%s",

		  __entry->rootid, __entry->ino, __entry->start, __entry->len,

		  __entry->reserved,

		  __print_flags((unsigned long)__entry->op, "",

				BTRFS_QGROUP_OPERATIONS)

	)

);



DEFINE_EVENT(btrfs__qgroup_rsv_data, btrfs_qgroup_reserve_data,



	TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),



	TP_ARGS(inode, start, len, reserved, op)

);



DEFINE_EVENT(btrfs__qgroup_rsv_data, btrfs_qgroup_release_data,



	TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),



	TP_ARGS(inode, start, len, reserved, op)

);



DECLARE_EVENT_CLASS(btrfs__qgroup_delayed_ref,



	TP_PROTO(u64 ref_root, u64 reserved),



	TP_ARGS(ref_root, reserved),



	TP_STRUCT__entry(

		__field(	u64,		ref_root	)

		__field(	u64,		reserved	)

	),



	TP_fast_assign(

		__entry->ref_root	= ref_root;

		__entry->reserved	= reserved;

	),



	TP_printk("root=%llu, reserved=%llu, op=free",

		  __entry->ref_root, __entry->reserved)

);



DEFINE_EVENT(btrfs__qgroup_delayed_ref, btrfs_qgroup_free_delayed_ref,



	TP_PROTO(u64 ref_root, u64 reserved),



	TP_ARGS(ref_root, reserved)

);

#endif /* _TRACE_BTRFS_H */



/* This part must be outside protection */