Commit 09ed2f16 authored by Liu Bo's avatar Liu Bo Committed by David Sterba
Browse files

Btrfs: add file item tracepoints 



While debugging truncate problems, I found that these tracepoints could
help us quickly know what went wrong.

Two sets of tracepoints are created to track regular/prealloc file item
and inline file item respectively, I put inline as a separate one since
what inline file items cares about are way less than the regular one.

This adds four tracepoints:
- btrfs_get_extent_show_fi_regular
- btrfs_get_extent_show_fi_inline
- btrfs_truncate_show_fi_regular
- btrfs_truncate_show_fi_inline

Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
[ formatting adjustments ]
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent dec95574

fs/btrfs/inode.c

+15 −0
Original line number Diff line number Diff line
@@ -4401,9 +4401,17 @@ search_again: 
			if (extent_type != BTRFS_FILE_EXTENT_INLINE) {

				item_end +=

				    btrfs_file_extent_num_bytes(leaf, fi);



				trace_btrfs_truncate_show_fi_regular(

					BTRFS_I(inode), leaf, fi,

					found_key.offset);

			} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {

				item_end += btrfs_file_extent_inline_len(leaf,

							 path->slots[0], fi);



				trace_btrfs_truncate_show_fi_inline(

					BTRFS_I(inode), leaf, fi, path->slots[0],

					found_key.offset);

			}

			item_end--;

		}
@@ -6828,11 +6836,18 @@ again: 
	    found_type == BTRFS_FILE_EXTENT_PREALLOC) {

		extent_end = extent_start +

		       btrfs_file_extent_num_bytes(leaf, item);



		trace_btrfs_get_extent_show_fi_regular(inode, leaf, item,

						       extent_start);

	} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {

		size_t size;

		size = btrfs_file_extent_inline_len(leaf, path->slots[0], item);

		extent_end = ALIGN(extent_start + size,

				   fs_info->sectorsize);



		trace_btrfs_get_extent_show_fi_inline(inode, leaf, item,

						      path->slots[0],

						      extent_start);

	}

next:

	if (start >= extent_end) {

include/trace/events/btrfs.h

+139 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ struct btrfs_root; 
struct btrfs_fs_info;

struct btrfs_inode;

struct extent_map;

struct btrfs_file_extent_item;

struct btrfs_ordered_extent;

struct btrfs_delayed_ref_node;

struct btrfs_delayed_tree_ref;
@@ -54,6 +55,12 @@ struct btrfs_qgroup_extent_record; 
	      (obj >= BTRFS_ROOT_TREE_OBJECTID &&			\

	       obj <= BTRFS_QUOTA_TREE_OBJECTID)) ? __show_root_type(obj) : "-"



#define show_fi_type(type)						\

	__print_symbolic(type,						\

		 { BTRFS_FILE_EXTENT_INLINE,	"INLINE" },		\

		 { BTRFS_FILE_EXTENT_REG,	"REG"	 },		\

		 { BTRFS_FILE_EXTENT_PREALLOC,	"PREALLOC"})



#define BTRFS_GROUP_FLAGS	\

	{ BTRFS_BLOCK_GROUP_DATA,	"DATA"},	\

	{ BTRFS_BLOCK_GROUP_SYSTEM,	"SYSTEM"},	\
@@ -232,6 +239,138 @@ TRACE_EVENT_CONDITION(btrfs_get_extent, 
		  __entry->refs, __entry->compress_type)

);



/* file extent item */

DECLARE_EVENT_CLASS(btrfs__file_extent_item_regular,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, u64 start),



	TP_ARGS(bi, l, fi, start),



	TP_STRUCT__entry_btrfs(

		__field(	u64,	root_obj	)

		__field(	u64,	ino		)

		__field(	loff_t,	isize		)

		__field(	u64,	disk_isize	)

		__field(	u64,	num_bytes	)

		__field(	u64,	ram_bytes	)

		__field(	u64,	disk_bytenr	)

		__field(	u64,	disk_num_bytes	)

		__field(	u64,	extent_offset	)

		__field(	u8,	extent_type	)

		__field(	u8,	compression	)

		__field(	u64,	extent_start	)

		__field(	u64,	extent_end	)

	),



	TP_fast_assign_btrfs(bi->root->fs_info,

		__entry->root_obj	= bi->root->objectid;

		__entry->ino		= btrfs_ino(bi);

		__entry->isize		= bi->vfs_inode.i_size;

		__entry->disk_isize	= bi->disk_i_size;

		__entry->num_bytes	= btrfs_file_extent_num_bytes(l, fi);

		__entry->ram_bytes	= btrfs_file_extent_ram_bytes(l, fi);

		__entry->disk_bytenr	= btrfs_file_extent_disk_bytenr(l, fi);

		__entry->disk_num_bytes	= btrfs_file_extent_disk_num_bytes(l, fi);

		__entry->extent_offset	= btrfs_file_extent_offset(l, fi);

		__entry->extent_type	= btrfs_file_extent_type(l, fi);

		__entry->compression	= btrfs_file_extent_compression(l, fi);

		__entry->extent_start	= start;

		__entry->extent_end	= (start + __entry->num_bytes);

	),



	TP_printk_btrfs(

		"root=%llu(%s) inode=%llu size=%llu disk_isize=%llu "

		"file extent range=[%llu %llu] "

		"(num_bytes=%llu ram_bytes=%llu disk_bytenr=%llu "

		"disk_num_bytes=%llu extent_offset=%llu type=%s "

		"compression=%u",

		show_root_type(__entry->root_obj), __entry->ino,

		__entry->isize,

		__entry->disk_isize, __entry->extent_start,

		__entry->extent_end, __entry->num_bytes, __entry->ram_bytes,

		__entry->disk_bytenr, __entry->disk_num_bytes,

		__entry->extent_offset, show_fi_type(__entry->extent_type),

		__entry->compression)

);



DECLARE_EVENT_CLASS(

	btrfs__file_extent_item_inline,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, int slot, u64 start),



	TP_ARGS(bi, l, fi, slot,  start),



	TP_STRUCT__entry_btrfs(

		__field(	u64,	root_obj	)

		__field(	u64,	ino		)

		__field(	loff_t,	isize		)

		__field(	u64,	disk_isize	)

		__field(	u8,	extent_type	)

		__field(	u8,	compression	)

		__field(	u64,	extent_start	)

		__field(	u64,	extent_end	)

	),



	TP_fast_assign_btrfs(

		bi->root->fs_info,

		__entry->root_obj	= bi->root->objectid;

		__entry->ino		= btrfs_ino(bi);

		__entry->isize		= bi->vfs_inode.i_size;

		__entry->disk_isize	= bi->disk_i_size;

		__entry->extent_type	= btrfs_file_extent_type(l, fi);

		__entry->compression	= btrfs_file_extent_compression(l, fi);

		__entry->extent_start	= start;

		__entry->extent_end	= (start + btrfs_file_extent_inline_len(l, slot, fi));

	),



	TP_printk_btrfs(

		"root=%llu(%s) inode=%llu size=%llu disk_isize=%llu "

		"file extent range=[%llu %llu] "

		"extent_type=%s compression=%u",

		show_root_type(__entry->root_obj), __entry->ino, __entry->isize,

		__entry->disk_isize, __entry->extent_start,

		__entry->extent_end, show_fi_type(__entry->extent_type),

		__entry->compression)

);



DEFINE_EVENT(

	btrfs__file_extent_item_regular, btrfs_get_extent_show_fi_regular,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, u64 start),



	TP_ARGS(bi, l, fi, start)

);



DEFINE_EVENT(

	btrfs__file_extent_item_regular, btrfs_truncate_show_fi_regular,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, u64 start),



	TP_ARGS(bi, l, fi, start)

);



DEFINE_EVENT(

	btrfs__file_extent_item_inline, btrfs_get_extent_show_fi_inline,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, int slot, u64 start),



	TP_ARGS(bi, l, fi, slot, start)

);



DEFINE_EVENT(

	btrfs__file_extent_item_inline, btrfs_truncate_show_fi_inline,



	TP_PROTO(struct btrfs_inode *bi, struct extent_buffer *l,

		 struct btrfs_file_extent_item *fi, int slot, u64 start),



	TP_ARGS(bi, l, fi, slot, start)

);



#define show_ordered_flags(flags)					   \

	__print_flags(flags, "|",					   \

		{ (1 << BTRFS_ORDERED_IO_DONE), 	"IO_DONE" 	}, \

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