From 4ed0a7a3b7c3f8387caf2ad57424d9341f523856 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Thu, 26 Apr 2018 17:17:20 +0800 Subject: btrfs: trace: Add trace points for unused block groups This patch will add the following trace events: 1) btrfs_remove_block_group For btrfs_remove_block_group() function. Triggered when a block group is really removed. 2) btrfs_add_unused_block_group Triggered which block group is added to unused_bgs list. 3) btrfs_skip_unused_block_group Triggered which unused block group is not deleted. These trace events is pretty handy to debug case related to block group auto remove. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba --- include/trace/events/btrfs.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'include/trace') diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index 5af2479e9b16..914ddb7a6d25 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -1805,6 +1805,48 @@ TRACE_EVENT(btrfs_inode_mod_outstanding_extents, __entry->ino, __entry->mod) ); +DECLARE_EVENT_CLASS(btrfs__block_group, + TP_PROTO(const struct btrfs_block_group_cache *bg_cache), + + TP_ARGS(bg_cache), + + TP_STRUCT__entry_btrfs( + __field( u64, bytenr ) + __field( u64, len ) + __field( u64, used ) + __field( u64, flags ) + ), + + TP_fast_assign_btrfs(bg_cache->fs_info, + __entry->bytenr = bg_cache->key.objectid, + __entry->len = bg_cache->key.offset, + __entry->used = btrfs_block_group_used(&bg_cache->item); + __entry->flags = bg_cache->flags; + ), + + TP_printk_btrfs("bg bytenr=%llu len=%llu used=%llu flags=%llu(%s)", + __entry->bytenr, __entry->len, __entry->used, __entry->flags, + __print_flags(__entry->flags, "|", BTRFS_GROUP_FLAGS)) +); + +DEFINE_EVENT(btrfs__block_group, btrfs_remove_block_group, + TP_PROTO(const struct btrfs_block_group_cache *bg_cache), + + TP_ARGS(bg_cache) +); + +DEFINE_EVENT(btrfs__block_group, btrfs_add_unused_block_group, + TP_PROTO(const struct btrfs_block_group_cache *bg_cache), + + TP_ARGS(bg_cache) +); + +DEFINE_EVENT(btrfs__block_group, btrfs_skip_unused_block_group, + TP_PROTO(const struct btrfs_block_group_cache *bg_cache), + + TP_ARGS(bg_cache) +); + #endif /* _TRACE_BTRFS_H */ /* This part must be outside protection */ -- cgit v1.2.3