Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "The changes range through all types: cleanups, core chagnes, sanity
  checks, fixes, other user visible changes, detailed list below:

   - deprecated: user transaction ioctl

   - mount option ssd does not change allocation alignments

   - degraded read-write mount is allowed if all the raid profile
     constraints are met, now based on more accurate check

   - defrag: do not reset compression afterwards; the NOCOMPRESS flag
     can be now overriden by defrag

   - prep work for better extent reference tracking (related to the
     qgroup slowness with balance)

   - prep work for compression heuristics

   - memory allocation reductions (may help latencies on a loaded
     system)

   - better accounting for io waiting states

   - error handling improvements (removed BUGs)

   - added more sanity checks for shared refs

   - fix readdir vs pagefault deadlock under some circumstances

   - fix for 'no-hole' mode, certain combination of compressed and
     inline extents

   - send: fix emission of invalid clone operations

   - fixup file mode if setting acls fail

   - more fixes from fuzzing

   - oher cleanups"

* 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (104 commits)
  btrfs: submit superblock io with REQ_META and REQ_PRIO
  btrfs: remove unnecessary memory barrier in btrfs_direct_IO
  btrfs: remove superfluous chunk_tree argument from btrfs_alloc_dev_extent
  btrfs: Remove chunk_objectid parameter of btrfs_alloc_dev_extent
  btrfs: pass fs_info to btrfs_del_root instead of tree_root
  Btrfs: add one more sanity check for shared ref type
  Btrfs: remove BUG_ON in __add_tree_block
  Btrfs: remove BUG() in add_data_reference
  Btrfs: remove BUG() in print_extent_item
  Btrfs: remove BUG() in btrfs_extent_inline_ref_size
  Btrfs: convert to use btrfs_get_extent_inline_ref_type
  Btrfs: add a helper to retrive extent inline ref type
  btrfs: scrub: simplify scrub worker initialization
  btrfs: scrub: clean up division in scrub_find_csum
  btrfs: scrub: clean up division in __scrub_mark_bitmap
  btrfs: scrub: use bool for flush_all_writes
  btrfs: preserve i_mode if __btrfs_set_acl() fails
  btrfs: Remove extraneous chunk_objectid variable
  btrfs: Remove chunk_objectid argument from btrfs_make_block_group
  btrfs: Remove extra parentheses from condition in copy_items()
  ...

1 files changed, 200 insertions, 131 deletions

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index cd99a3658156..dc1d0df91e0b 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -26,6 +26,7 @@ struct btrfs_work;
 struct __btrfs_workqueue;
 struct btrfs_qgroup_extent_record;
 struct btrfs_qgroup;
+struct prelim_ref;
 
 #define show_ref_type(type)						\
 	__print_symbolic(type,						\
@@ -73,11 +74,11 @@ struct btrfs_qgroup;
 	{ BTRFS_BLOCK_GROUP_RAID5,	"RAID5"},	\
 	{ BTRFS_BLOCK_GROUP_RAID6,	"RAID6"}
 
-#define BTRFS_UUID_SIZE 16
-#define TP_STRUCT__entry_fsid __array(u8, fsid, BTRFS_UUID_SIZE)
+#define BTRFS_FSID_SIZE 16
+#define TP_STRUCT__entry_fsid __array(u8, fsid, BTRFS_FSID_SIZE)
 
 #define TP_fast_assign_fsid(fs_info)					\
-	memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE)
+	memcpy(__entry->fsid, fs_info->fsid, BTRFS_FSID_SIZE)
 
 #define TP_STRUCT__entry_btrfs(args...)					\
 	TP_STRUCT__entry(						\
@@ -92,7 +93,7 @@ struct btrfs_qgroup;
 
 TRACE_EVENT(btrfs_transaction_commit,
 
-	TP_PROTO(struct btrfs_root *root),
+	TP_PROTO(const struct btrfs_root *root),
 
 	TP_ARGS(root),
 
@@ -113,7 +114,7 @@ TRACE_EVENT(btrfs_transaction_commit,
 
 DECLARE_EVENT_CLASS(btrfs__inode,
 
-	TP_PROTO(struct inode *inode),
+	TP_PROTO(const struct inode *inode),
 
 	TP_ARGS(inode),
 
@@ -151,21 +152,21 @@ DECLARE_EVENT_CLASS(btrfs__inode,
 
 DEFINE_EVENT(btrfs__inode, btrfs_inode_new,
 
-	TP_PROTO(struct inode *inode),
+	TP_PROTO(const struct inode *inode),
 
 	TP_ARGS(inode)
 );
 
 DEFINE_EVENT(btrfs__inode, btrfs_inode_request,
 
-	TP_PROTO(struct inode *inode),
+	TP_PROTO(const struct inode *inode),
 
 	TP_ARGS(inode)
 );
 
 DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
 
-	TP_PROTO(struct inode *inode),
+	TP_PROTO(const struct inode *inode),
 
 	TP_ARGS(inode)
 );
@@ -192,8 +193,8 @@ DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
 
 TRACE_EVENT_CONDITION(btrfs_get_extent,
 
-	TP_PROTO(struct btrfs_root *root, struct btrfs_inode *inode,
-		 struct extent_map *map),
+	TP_PROTO(const struct btrfs_root *root, const struct btrfs_inode *inode,
+		 const struct extent_map *map),
 
 	TP_ARGS(root, inode, map),
 
@@ -388,7 +389,8 @@ DEFINE_EVENT(
 
 DECLARE_EVENT_CLASS(btrfs__ordered_extent,
 
-	TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+	TP_PROTO(const struct inode *inode,
+		 const struct btrfs_ordered_extent *ordered),
 
 	TP_ARGS(inode, ordered),
 
@@ -440,36 +442,40 @@ DECLARE_EVENT_CLASS(btrfs__ordered_extent,
 
 DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_add,
 
-	TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+	TP_PROTO(const struct inode *inode,
+		 const struct btrfs_ordered_extent *ordered),
 
 	TP_ARGS(inode, ordered)
 );
 
 DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_remove,
 
-	TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+	TP_PROTO(const struct inode *inode,
+		 const struct btrfs_ordered_extent *ordered),
 
 	TP_ARGS(inode, ordered)
 );
 
 DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_start,
 
-	TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+	TP_PROTO(const struct inode *inode,
+		 const struct btrfs_ordered_extent *ordered),
 
 	TP_ARGS(inode, ordered)
 );
 
 DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_put,
 
-	TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+	TP_PROTO(const struct inode *inode,
+		 const struct btrfs_ordered_extent *ordered),
 
 	TP_ARGS(inode, ordered)
 );
 
 DECLARE_EVENT_CLASS(btrfs__writepage,
 
-	TP_PROTO(struct page *page, struct inode *inode,
-		 struct writeback_control *wbc),
+	TP_PROTO(const struct page *page, const struct inode *inode,
+		 const struct writeback_control *wbc),
 
 	TP_ARGS(page, inode, wbc),
 
@@ -517,15 +523,15 @@ DECLARE_EVENT_CLASS(btrfs__writepage,
 
 DEFINE_EVENT(btrfs__writepage, __extent_writepage,
 
-	TP_PROTO(struct page *page, struct inode *inode,
-		 struct writeback_control *wbc),
+	TP_PROTO(const struct page *page, const struct inode *inode,
+		 const struct writeback_control *wbc),
 
 	TP_ARGS(page, inode, wbc)
 );
 
 TRACE_EVENT(btrfs_writepage_end_io_hook,
 
-	TP_PROTO(struct page *page, u64 start, u64 end, int uptodate),
+	TP_PROTO(const struct page *page, u64 start, u64 end, int uptodate),
 
 	TP_ARGS(page, start, end, uptodate),
 
@@ -558,7 +564,7 @@ TRACE_EVENT(btrfs_writepage_end_io_hook,
 
 TRACE_EVENT(btrfs_sync_file,
 
-	TP_PROTO(struct file *file, int datasync),
+	TP_PROTO(const struct file *file, int datasync),
 
 	TP_ARGS(file, datasync),
 
@@ -570,8 +576,8 @@ TRACE_EVENT(btrfs_sync_file,
 	),
 
 	TP_fast_assign(
-		struct dentry *dentry = file->f_path.dentry;
-		struct inode *inode = d_inode(dentry);
+		const struct dentry *dentry = file->f_path.dentry;
+		const struct inode *inode = d_inode(dentry);
 
 		TP_fast_assign_fsid(btrfs_sb(file->f_path.dentry->d_sb));
 		__entry->ino		= inode->i_ino;
@@ -589,7 +595,7 @@ TRACE_EVENT(btrfs_sync_file,
 
 TRACE_EVENT(btrfs_sync_fs,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, int wait),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, int wait),
 
 	TP_ARGS(fs_info, wait),
 
@@ -606,13 +612,13 @@ TRACE_EVENT(btrfs_sync_fs,
 
 TRACE_EVENT(btrfs_add_block_group,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_block_group_cache *block_group, int create),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_block_group_cache *block_group, int create),
 
 	TP_ARGS(fs_info, block_group, create),
 
 	TP_STRUCT__entry(
-		__array(	u8,	fsid,	BTRFS_UUID_SIZE	)
+		__array(	u8,	fsid,	BTRFS_FSID_SIZE	)
 		__field(	u64,	offset			)
 		__field(	u64,	size			)
 		__field(	u64,	flags			)
@@ -622,7 +628,7 @@ TRACE_EVENT(btrfs_add_block_group,
 	),
 
 	TP_fast_assign(
-		memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);
+		memcpy(__entry->fsid, fs_info->fsid, BTRFS_FSID_SIZE);
 		__entry->offset		= block_group->key.objectid;
 		__entry->size		= block_group->key.offset;
 		__entry->flags		= block_group->flags;
@@ -654,9 +660,9 @@ TRACE_EVENT(btrfs_add_block_group,
 
 DECLARE_EVENT_CLASS(btrfs_delayed_tree_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_tree_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_tree_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action),
@@ -697,9 +703,9 @@ DECLARE_EVENT_CLASS(btrfs_delayed_tree_ref,
 
 DEFINE_EVENT(btrfs_delayed_tree_ref,  add_delayed_tree_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_tree_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_tree_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action)
@@ -707,9 +713,9 @@ DEFINE_EVENT(btrfs_delayed_tree_ref,  add_delayed_tree_ref,
 
 DEFINE_EVENT(btrfs_delayed_tree_ref,  run_delayed_tree_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_tree_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_tree_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action)
@@ -717,9 +723,9 @@ DEFINE_EVENT(btrfs_delayed_tree_ref,  run_delayed_tree_ref,
 
 DECLARE_EVENT_CLASS(btrfs_delayed_data_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_data_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_data_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action),
@@ -764,9 +770,9 @@ DECLARE_EVENT_CLASS(btrfs_delayed_data_ref,
 
 DEFINE_EVENT(btrfs_delayed_data_ref,  add_delayed_data_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_data_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_data_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action)
@@ -774,9 +780,9 @@ DEFINE_EVENT(btrfs_delayed_data_ref,  add_delayed_data_ref,
 
 DEFINE_EVENT(btrfs_delayed_data_ref,  run_delayed_data_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_data_ref *full_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_data_ref *full_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, full_ref, action)
@@ -784,9 +790,9 @@ DEFINE_EVENT(btrfs_delayed_data_ref,  run_delayed_data_ref,
 
 DECLARE_EVENT_CLASS(btrfs_delayed_ref_head,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_ref_head *head_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, head_ref, action),
@@ -814,9 +820,9 @@ DECLARE_EVENT_CLASS(btrfs_delayed_ref_head,
 
 DEFINE_EVENT(btrfs_delayed_ref_head,  add_delayed_ref_head,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_ref_head *head_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, head_ref, action)
@@ -824,9 +830,9 @@ DEFINE_EVENT(btrfs_delayed_ref_head,  add_delayed_ref_head,
 
 DEFINE_EVENT(btrfs_delayed_ref_head,  run_delayed_ref_head,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_delayed_ref_node *ref,
-		 struct btrfs_delayed_ref_head *head_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_delayed_ref_node *ref,
+		 const struct btrfs_delayed_ref_head *head_ref,
 		 int action),
 
 	TP_ARGS(fs_info, ref, head_ref, action)
@@ -846,8 +852,8 @@ DEFINE_EVENT(btrfs_delayed_ref_head,  run_delayed_ref_head,
 
 DECLARE_EVENT_CLASS(btrfs__chunk,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, struct map_lookup *map,
-		 u64 offset, u64 size),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct map_lookup *map, u64 offset, u64 size),
 
 	TP_ARGS(fs_info, map, offset, size),
 
@@ -880,24 +886,24 @@ DECLARE_EVENT_CLASS(btrfs__chunk,
 
 DEFINE_EVENT(btrfs__chunk,  btrfs_chunk_alloc,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, struct map_lookup *map,
-		 u64 offset, u64 size),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct map_lookup *map, u64 offset, u64 size),
 
 	TP_ARGS(fs_info, map, offset, size)
 );
 
 DEFINE_EVENT(btrfs__chunk,  btrfs_chunk_free,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, struct map_lookup *map,
-		 u64 offset, u64 size),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct map_lookup *map, u64 offset, u64 size),
 
 	TP_ARGS(fs_info, map, offset, size)
 );
 
 TRACE_EVENT(btrfs_cow_block,
 
-	TP_PROTO(struct btrfs_root *root, struct extent_buffer *buf,
-		 struct extent_buffer *cow),
+	TP_PROTO(const struct btrfs_root *root, const struct extent_buffer *buf,
+		 const struct extent_buffer *cow),
 
 	TP_ARGS(root, buf, cow),
 
@@ -931,7 +937,7 @@ TRACE_EVENT(btrfs_cow_block,
 
 TRACE_EVENT(btrfs_space_reservation,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, char *type, u64 val,
+	TP_PROTO(const struct btrfs_fs_info *fs_info, char *type, u64 val,
 		 u64 bytes, int reserve),
 
 	TP_ARGS(fs_info, type, val, bytes, reserve),
@@ -963,13 +969,13 @@ TRACE_EVENT(btrfs_space_reservation,
 
 TRACE_EVENT(btrfs_trigger_flush,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 flags, u64 bytes,
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 flags, u64 bytes,
 		 int flush, char *reason),
 
 	TP_ARGS(fs_info, flags, bytes, flush, reason),
 
 	TP_STRUCT__entry(
-		__array(	u8,	fsid,	BTRFS_UUID_SIZE	)
+		__array(	u8,	fsid,	BTRFS_FSID_SIZE	)
 		__field(	u64,	flags			)
 		__field(	u64,	bytes			)
 		__field(	int,	flush			)
@@ -977,7 +983,7 @@ TRACE_EVENT(btrfs_trigger_flush,
 	),
 
 	TP_fast_assign(
-		memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);
+		memcpy(__entry->fsid, fs_info->fsid, BTRFS_FSID_SIZE);
 		__entry->flags	= flags;
 		__entry->bytes	= bytes;
 		__entry->flush	= flush;
@@ -1004,42 +1010,39 @@ TRACE_EVENT(btrfs_trigger_flush,
 
 TRACE_EVENT(btrfs_flush_space,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 flags, u64 num_bytes,
-		 u64 orig_bytes, int state, int ret),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 flags, u64 num_bytes,
+		 int state, int ret),
 
-	TP_ARGS(fs_info, flags, num_bytes, orig_bytes, state, ret),
+	TP_ARGS(fs_info, flags, num_bytes, state, ret),
 
 	TP_STRUCT__entry(
-		__array(	u8,	fsid,	BTRFS_UUID_SIZE	)
+		__array(	u8,	fsid,	BTRFS_FSID_SIZE	)
 		__field(	u64,	flags			)
 		__field(	u64,	num_bytes		)
-		__field(	u64,	orig_bytes		)
 		__field(	int,	state			)
 		__field(	int,	ret			)
 	),
 
 	TP_fast_assign(
-		memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);
+		memcpy(__entry->fsid, fs_info->fsid, BTRFS_FSID_SIZE);
 		__entry->flags		=	flags;
 		__entry->num_bytes	=	num_bytes;
-		__entry->orig_bytes	=	orig_bytes;
 		__entry->state		=	state;
 		__entry->ret		=	ret;
 	),
 
-	TP_printk("%pU: state=%d(%s) flags=%llu(%s) num_bytes=%llu "
-		  "orig_bytes=%llu ret=%d", __entry->fsid, __entry->state,
+	TP_printk("%pU: state=%d(%s) flags=%llu(%s) num_bytes=%llu ret=%d",
+		  __entry->fsid, __entry->state,
 		  show_flush_state(__entry->state),
 		  (unsigned long long)__entry->flags,
 		  __print_flags((unsigned long)__entry->flags, "|",
 				BTRFS_GROUP_FLAGS),
-		  (unsigned long long)__entry->num_bytes,
-		  (unsigned long long)__entry->orig_bytes, __entry->ret)
+		  (unsigned long long)__entry->num_bytes, __entry->ret)
 );
 
 DECLARE_EVENT_CLASS(btrfs__reserved_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 start, u64 len),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 start, u64 len),
 
 	TP_ARGS(fs_info, start, len),
 
@@ -1061,22 +1064,22 @@ DECLARE_EVENT_CLASS(btrfs__reserved_extent,
 
 DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_alloc,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 start, u64 len),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 start, u64 len),
 
 	TP_ARGS(fs_info, start, len)
 );
 
 DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_free,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 start, u64 len),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 start, u64 len),
 
 	TP_ARGS(fs_info, start, len)
 );
 
 TRACE_EVENT(find_free_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 num_bytes, u64 empty_size,
-		 u64 data),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 num_bytes,
+		 u64 empty_size, u64 data),
 
 	TP_ARGS(fs_info, num_bytes, empty_size, data),
 
@@ -1101,8 +1104,8 @@ TRACE_EVENT(find_free_extent,
 
 DECLARE_EVENT_CLASS(btrfs__reserve_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_block_group_cache *block_group, u64 start,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_block_group_cache *block_group, u64 start,
 		 u64 len),
 
 	TP_ARGS(fs_info, block_group, start, len),
@@ -1132,8 +1135,8 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_block_group_cache *block_group, u64 start,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_block_group_cache *block_group, u64 start,
 		 u64 len),
 
 	TP_ARGS(fs_info, block_group, start, len)
@@ -1141,8 +1144,8 @@ DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent,
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent_cluster,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_block_group_cache *block_group, u64 start,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_block_group_cache *block_group, u64 start,
 		 u64 len),
 
 	TP_ARGS(fs_info, block_group, start, len)
@@ -1150,7 +1153,7 @@ DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent_cluster,
 
 TRACE_EVENT(btrfs_find_cluster,
 
-	TP_PROTO(struct btrfs_block_group_cache *block_group, u64 start,
+	TP_PROTO(const struct btrfs_block_group_cache *block_group, u64 start,
 		 u64 bytes, u64 empty_size, u64 min_bytes),
 
 	TP_ARGS(block_group, start, bytes, empty_size, min_bytes),
@@ -1183,7 +1186,7 @@ TRACE_EVENT(btrfs_find_cluster,
 
 TRACE_EVENT(btrfs_failed_cluster_setup,
 
-	TP_PROTO(struct btrfs_block_group_cache *block_group),
+	TP_PROTO(const struct btrfs_block_group_cache *block_group),
 
 	TP_ARGS(block_group),
 
@@ -1200,8 +1203,9 @@ TRACE_EVENT(btrfs_failed_cluster_setup,
 
 TRACE_EVENT(btrfs_setup_cluster,
 
-	TP_PROTO(struct btrfs_block_group_cache *block_group,
-		 struct btrfs_free_cluster *cluster, u64 size, int bitmap),
+	TP_PROTO(const struct btrfs_block_group_cache *block_group,
+		 const struct btrfs_free_cluster *cluster,
+		 u64 size, int bitmap),
 
 	TP_ARGS(block_group, cluster, size, bitmap),
 
@@ -1235,12 +1239,13 @@ TRACE_EVENT(btrfs_setup_cluster,
 struct extent_state;
 TRACE_EVENT(alloc_extent_state,
 
-	TP_PROTO(struct extent_state *state, gfp_t mask, unsigned long IP),
+	TP_PROTO(const struct extent_state *state,
+		 gfp_t mask, unsigned long IP),
 
 	TP_ARGS(state, mask, IP),
 
 	TP_STRUCT__entry(
-		__field(struct extent_state *, state)
+		__field(const struct extent_state *, state)
 		__field(gfp_t, mask)
 		__field(unsigned long, ip)
 	),
@@ -1252,17 +1257,17 @@ TRACE_EVENT(alloc_extent_state,
 	),
 
 	TP_printk("state=%p mask=%s caller=%pS", __entry->state,
-		  show_gfp_flags(__entry->mask), (void *)__entry->ip)
+		  show_gfp_flags(__entry->mask), (const void *)__entry->ip)
 );
 
 TRACE_EVENT(free_extent_state,
 
-	TP_PROTO(struct extent_state *state, unsigned long IP),
+	TP_PROTO(const struct extent_state *state, unsigned long IP),
 
 	TP_ARGS(state, IP),
 
 	TP_STRUCT__entry(
-		__field(struct extent_state *, state)
+		__field(const struct extent_state *, state)
 		__field(unsigned long, ip)
 	),
 
@@ -1272,22 +1277,22 @@ TRACE_EVENT(free_extent_state,
 	),
 
 	TP_printk("state=%p caller=%pS", __entry->state,
-		  (void *)__entry->ip)
+		  (const void *)__entry->ip)
 );
 
 DECLARE_EVENT_CLASS(btrfs__work,
 
-	TP_PROTO(struct btrfs_work *work),
+	TP_PROTO(const struct btrfs_work *work),
 
 	TP_ARGS(work),
 
 	TP_STRUCT__entry_btrfs(
-		__field(	void *,	work			)
-		__field(	void *, wq			)
-		__field(	void *,	func			)
-		__field(	void *,	ordered_func		)
-		__field(	void *,	ordered_free		)
-		__field(	void *,	normal_work		)
+		__field(	const void *,	work			)
+		__field(	const void *,	wq			)
+		__field(	const void *,	func			)
+		__field(	const void *,	ordered_func		)
+		__field(	const void *,	ordered_free		)
+		__field(	const void *,	normal_work		)
 	),
 
 	TP_fast_assign_btrfs(btrfs_work_owner(work),
@@ -1312,12 +1317,12 @@ DECLARE_EVENT_CLASS(btrfs__work,
  */
 DECLARE_EVENT_CLASS(btrfs__work__done,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, void *wtag),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, const void *wtag),
 
 	TP_ARGS(fs_info, wtag),
 
 	TP_STRUCT__entry_btrfs(
-		__field(	void *,	wtag			)
+		__field(	const void *,	wtag			)
 	),
 
 	TP_fast_assign_btrfs(fs_info,
@@ -1329,40 +1334,41 @@ DECLARE_EVENT_CLASS(btrfs__work__done,
 
 DEFINE_EVENT(btrfs__work, btrfs_work_queued,
 
-	TP_PROTO(struct btrfs_work *work),
+	TP_PROTO(const struct btrfs_work *work),
 
 	TP_ARGS(work)
 );
 
 DEFINE_EVENT(btrfs__work, btrfs_work_sched,
 
-	TP_PROTO(struct btrfs_work *work),
+	TP_PROTO(const struct btrfs_work *work),
 
 	TP_ARGS(work)
 );
 
 DEFINE_EVENT(btrfs__work__done, btrfs_all_work_done,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, void *wtag),
+	TP_PROTO(const struct btrfs_fs_info *fs_info, const void *wtag),
 
 	TP_ARGS(fs_info, wtag)
 );
 
 DEFINE_EVENT(btrfs__work, btrfs_ordered_sched,
 
-	TP_PROTO(struct btrfs_work *work),
+	TP_PROTO(const struct btrfs_work *work),
 
 	TP_ARGS(work)
 );
 
 DECLARE_EVENT_CLASS(btrfs__workqueue,
 
-	TP_PROTO(struct __btrfs_workqueue *wq, const char *name, int high),
+	TP_PROTO(const struct __btrfs_workqueue *wq,
+		 const char *name, int high),
 
 	TP_ARGS(wq, name, high),
 
 	TP_STRUCT__entry_btrfs(
-		__field(	void *,	wq			)
+		__field(	const void *,	wq			)
 		__string(	name,	name			)
 		__field(	int ,	high			)
 	),
@@ -1381,19 +1387,20 @@ DECLARE_EVENT_CLASS(btrfs__workqueue,
 
 DEFINE_EVENT(btrfs__workqueue, btrfs_workqueue_alloc,
 
-	TP_PROTO(struct __btrfs_workqueue *wq, const char *name, int high),
+	TP_PROTO(const struct __btrfs_workqueue *wq,
+		 const char *name, int high),
 
 	TP_ARGS(wq, name, high)
 );
 
 DECLARE_EVENT_CLASS(btrfs__workqueue_done,
 
-	TP_PROTO(struct __btrfs_workqueue *wq),
+	TP_PROTO(const struct __btrfs_workqueue *wq),
 
 	TP_ARGS(wq),
 
 	TP_STRUCT__entry_btrfs(
-		__field(	void *,	wq			)
+		__field(	const void *,	wq		)
 	),
 
 	TP_fast_assign_btrfs(btrfs_workqueue_owner(wq),
@@ -1405,7 +1412,7 @@ DECLARE_EVENT_CLASS(btrfs__workqueue_done,
 
 DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy,
 
-	TP_PROTO(struct __btrfs_workqueue *wq),
+	TP_PROTO(const struct __btrfs_workqueue *wq),
 
 	TP_ARGS(wq)
 );
@@ -1417,7 +1424,8 @@ DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy,
 
 DECLARE_EVENT_CLASS(btrfs__qgroup_rsv_data,
 
-	TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),
+	TP_PROTO(const struct inode *inode, u64 start, u64 len,
+		 u64 reserved, int op),
 
 	TP_ARGS(inode, start, len, reserved, op),
 
@@ -1449,21 +1457,24 @@ DECLARE_EVENT_CLASS(btrfs__qgroup_rsv_data,
 
 DEFINE_EVENT(btrfs__qgroup_rsv_data, btrfs_qgroup_reserve_data,
 
-	TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),
+	TP_PROTO(const 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_PROTO(const 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(struct btrfs_fs_info *fs_info, u64 ref_root, u64 reserved),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 u64 ref_root, u64 reserved),
 
 	TP_ARGS(fs_info, ref_root, reserved),
 
@@ -1483,14 +1494,15 @@ DECLARE_EVENT_CLASS(btrfs__qgroup_delayed_ref,
 
 DEFINE_EVENT(btrfs__qgroup_delayed_ref, btrfs_qgroup_free_delayed_ref,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 ref_root, u64 reserved),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 u64 ref_root, u64 reserved),
 
 	TP_ARGS(fs_info, ref_root, reserved)
 );
 
 DECLARE_EVENT_CLASS(btrfs_qgroup_extent,
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_qgroup_extent_record *rec),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_qgroup_extent_record *rec),
 
 	TP_ARGS(fs_info, rec),
 
@@ -1511,23 +1523,23 @@ DECLARE_EVENT_CLASS(btrfs_qgroup_extent,
 
 DEFINE_EVENT(btrfs_qgroup_extent, btrfs_qgroup_account_extents,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_qgroup_extent_record *rec),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_qgroup_extent_record *rec),
 
 	TP_ARGS(fs_info, rec)
 );
 
 DEFINE_EVENT(btrfs_qgroup_extent, btrfs_qgroup_trace_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info,
-		 struct btrfs_qgroup_extent_record *rec),
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct btrfs_qgroup_extent_record *rec),
 
 	TP_ARGS(fs_info, rec)
 );
 
 TRACE_EVENT(btrfs_qgroup_account_extent,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 bytenr,
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 bytenr,
 		 u64 num_bytes, u64 nr_old_roots, u64 nr_new_roots),
 
 	TP_ARGS(fs_info, bytenr, num_bytes, nr_old_roots, nr_new_roots),
@@ -1556,7 +1568,7 @@ TRACE_EVENT(btrfs_qgroup_account_extent,
 
 TRACE_EVENT(qgroup_update_counters,
 
-	TP_PROTO(struct btrfs_fs_info *fs_info, u64 qgid,
+	TP_PROTO(const struct btrfs_fs_info *fs_info, u64 qgid,
 		 u64 cur_old_count, u64 cur_new_count),
 
 	TP_ARGS(fs_info, qgid, cur_old_count, cur_new_count),
@@ -1622,6 +1634,63 @@ TRACE_EVENT(qgroup_meta_reserve,
 		show_root_type(__entry->refroot), __entry->diff)
 );
 
+DECLARE_EVENT_CLASS(btrfs__prelim_ref,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct prelim_ref *oldref,
+		 const struct prelim_ref *newref, u64 tree_size),
+	TP_ARGS(fs_info, newref, oldref, tree_size),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,  root_id		)
+		__field(	u64,  objectid		)
+		__field(	 u8,  type		)
+		__field(	u64,  offset		)
+		__field(	int,  level		)
+		__field(	int,  old_count		)
+		__field(	u64,  parent		)
+		__field(	u64,  bytenr		)
+		__field(	int,  mod_count		)
+		__field(	u64,  tree_size		)
+	),
+
+	TP_fast_assign_btrfs(fs_info,
+		__entry->root_id	= oldref->root_id;
+		__entry->objectid	= oldref->key_for_search.objectid;
+		__entry->type		= oldref->key_for_search.type;
+		__entry->offset		= oldref->key_for_search.offset;
+		__entry->level		= oldref->level;
+		__entry->old_count	= oldref->count;
+		__entry->parent		= oldref->parent;
+		__entry->bytenr		= oldref->wanted_disk_byte;
+		__entry->mod_count	= newref ? newref->count : 0;
+		__entry->tree_size	= tree_size;
+	),
+
+	TP_printk_btrfs("root_id=%llu key=[%llu,%u,%llu] level=%d count=[%d+%d=%d] parent=%llu wanted_disk_byte=%llu nodes=%llu",
+			(unsigned long long)__entry->root_id,
+			(unsigned long long)__entry->objectid, __entry->type,
+			(unsigned long long)__entry->offset, __entry->level,
+			__entry->old_count, __entry->mod_count,
+			__entry->old_count + __entry->mod_count,
+			(unsigned long long)__entry->parent,
+			(unsigned long long)__entry->bytenr,
+			(unsigned long long)__entry->tree_size)
+);
+
+DEFINE_EVENT(btrfs__prelim_ref, btrfs_prelim_ref_merge,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct prelim_ref *oldref,
+		 const struct prelim_ref *newref, u64 tree_size),
+	TP_ARGS(fs_info, oldref, newref, tree_size)
+);
+
+DEFINE_EVENT(btrfs__prelim_ref, btrfs_prelim_ref_insert,
+	TP_PROTO(const struct btrfs_fs_info *fs_info,
+		 const struct prelim_ref *oldref,
+		 const struct prelim_ref *newref, u64 tree_size),
+	TP_ARGS(fs_info, oldref, newref, tree_size)
+);
+
 #endif /* _TRACE_BTRFS_H */
 
 /* This part must be outside protection */