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Commit f46b24c9 authored by David Sterba's avatar David Sterba
Browse files

btrfs: use fs_info for btrfs_handle_em_exist tracepoint 



We really want to know to which filesystem the extent map events belong,
but as it cannot be reached from the extent_map pointers, we need to
pass it down the callchain.

Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 0e08eb9b

fs/btrfs/extent_map.c

+4 −2
Original line number Diff line number Diff line
@@ -518,6 +518,7 @@ static noinline int merge_extent_mapping(struct extent_map_tree *em_tree, 


/**

 * btrfs_add_extent_mapping - add extent mapping into em_tree

 * @fs_info - used for tracepoint

 * @em_tree - the extent tree into which we want to insert the extent mapping

 * @em_in   - extent we are inserting

 * @start   - start of the logical range btrfs_get_extent() is requesting
@@ -535,7 +536,8 @@ static noinline int merge_extent_mapping(struct extent_map_tree *em_tree, 
 * Return 0 on success, otherwise -EEXIST.

 *

 */

int btrfs_add_extent_mapping(struct extent_map_tree *em_tree,

int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info,

			     struct extent_map_tree *em_tree,

			     struct extent_map **em_in, u64 start, u64 len)

{

	int ret;
@@ -553,7 +555,7 @@ int btrfs_add_extent_mapping(struct extent_map_tree *em_tree, 


		existing = search_extent_mapping(em_tree, start, len);



		trace_btrfs_handle_em_exist(existing, em, start, len);

		trace_btrfs_handle_em_exist(fs_info, existing, em, start, len);



		/*

		 * existing will always be non-NULL, since there must be

fs/btrfs/extent_map.h

+2 −1
Original line number Diff line number Diff line
@@ -92,7 +92,8 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen 
void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);

struct extent_map *search_extent_mapping(struct extent_map_tree *tree,

					 u64 start, u64 len);

int btrfs_add_extent_mapping(struct extent_map_tree *em_tree,

int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info,

			     struct extent_map_tree *em_tree,

			     struct extent_map **em_in, u64 start, u64 len);



#endif

fs/btrfs/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -7083,7 +7083,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 


	err = 0;

	write_lock(&em_tree->lock);

	err = btrfs_add_extent_mapping(em_tree, &em, start, len);

	err = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);

	write_unlock(&em_tree->lock);

out:

fs/btrfs/tests/extent-map-tests.c

+4 −4
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ static void test_case_1(struct btrfs_fs_info *fs_info, 
	em->len = len;

	em->block_start = start;

	em->block_len = len;

	ret = btrfs_add_extent_mapping(em_tree, &em, em->start, em->len);

	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);

	if (ret)

		test_msg("case1 [%llu %llu]: ret %d\n", start, start + len, ret);

	if (em &&
@@ -155,7 +155,7 @@ static void test_case_2(struct btrfs_fs_info *fs_info, 
	em->len = SZ_1K;

	em->block_start = EXTENT_MAP_INLINE;

	em->block_len = (u64)-1;

	ret = btrfs_add_extent_mapping(em_tree, &em, em->start, em->len);

	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);

	if (ret)

		test_msg("case2 [0 1K]: ret %d\n", ret);

	if (em &&
@@ -201,7 +201,7 @@ static void __test_case_3(struct btrfs_fs_info *fs_info, 
	em->len = SZ_16K;

	em->block_start = 0;

	em->block_len = SZ_16K;

	ret = btrfs_add_extent_mapping(em_tree, &em, start, len);

	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);

	if (ret)

		test_msg("case3 [0x%llx 0x%llx): ret %d\n",

			 start, start + len, ret);
@@ -288,7 +288,7 @@ static void __test_case_4(struct btrfs_fs_info *fs_info, 
	em->len = SZ_32K;

	em->block_start = 0;

	em->block_len = SZ_32K;

	ret = btrfs_add_extent_mapping(em_tree, &em, start, len);

	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);

	if (ret)

		test_msg("case4 [0x%llx 0x%llx): ret %d\n",

			 start, len, ret);

include/trace/events/btrfs.h

+7 −5
Original line number Diff line number Diff line
@@ -256,11 +256,13 @@ TRACE_EVENT_CONDITION(btrfs_get_extent, 


TRACE_EVENT(btrfs_handle_em_exist,



	TP_PROTO(const struct extent_map *existing, const struct extent_map *map, u64 start, u64 len),

	TP_PROTO(struct btrfs_fs_info *fs_info,

		const struct extent_map *existing, const struct extent_map *map,

		u64 start, u64 len),



	TP_ARGS(existing, map, start, len),

	TP_ARGS(fs_info, existing, map, start, len),



	TP_STRUCT__entry(

	TP_STRUCT__entry_btrfs(

		__field(	u64,  e_start		)

		__field(	u64,  e_len		)

		__field(	u64,  map_start		)
@@ -269,7 +271,7 @@ TRACE_EVENT(btrfs_handle_em_exist, 
		__field(	u64,  len		)

	),



	TP_fast_assign(

	TP_fast_assign_btrfs(fs_info,

		__entry->e_start	= existing->start;

		__entry->e_len		= existing->len;

		__entry->map_start	= map->start;
@@ -278,7 +280,7 @@ TRACE_EVENT(btrfs_handle_em_exist, 
		__entry->len		= len;

	),



	TP_printk("start=%llu len=%llu "

	TP_printk_btrfs("start=%llu len=%llu "

		  "existing(start=%llu len=%llu) "

		  "em(start=%llu len=%llu)",

		  __entry->start,