This can help us monitor truncated ordered extents.

Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
 include/trace/events/btrfs.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index e030d6f..1dc1197 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -259,6 +259,7 @@ DECLARE_EVENT_CLASS(btrfs__ordered_extent,
                __field(        int,  compress_type     )
                __field(        int,  refs              )
                __field(        u64,  root_objectid     )
+               __field(        u64,  truncated_len     )
        ),
 
        TP_fast_assign_btrfs(btrfs_sb(inode->i_sb),
@@ -273,10 +274,12 @@ DECLARE_EVENT_CLASS(btrfs__ordered_extent,
                __entry->refs           = atomic_read(&ordered->refs);
                __entry->root_objectid  =
                                BTRFS_I(inode)->root->root_key.objectid;
+               __entry->truncated_len  = ordered->truncated_len;
        ),
 
        TP_printk_btrfs("root = %llu(%s), ino = %llu, file_offset = %llu, "
                  "start = %llu, len = %llu, disk_len = %llu, "
+                 "truncated_len = %llu, "
                  "bytes_left = %llu, flags = %s, compress_type = %d, "
                  "refs = %d",
                  show_root_type(__entry->root_objectid),
@@ -285,6 +288,7 @@ DECLARE_EVENT_CLASS(btrfs__ordered_extent,
                  (unsigned long long)__entry->start,
                  (unsigned long long)__entry->len,
                  (unsigned long long)__entry->disk_len,
+                 (unsigned long long)__entry->truncated_len,
                  (unsigned long long)__entry->bytes_left,
                  show_ordered_flags(__entry->flags),
                  __entry->compress_type, __entry->refs)
-- 
2.5.5

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