Merge tag 'for-6.3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "The usual mix of performance improvements and new features.

  The core change is reworking how checksums are processed, with
  followup cleanups and simplifications. There are two minor changes in
  block layer and iomap code.

  Features:

   - block group allocation class heuristics:
      - pack files by size (up to 128k, up to 8M, more) to avoid
        fragmentation in block groups, assuming that file size and life
        time is correlated, in particular this may help during balance
      - with tracepoints and extensible in the future

  Performance:

   - send: cache directory utimes and only emit the command when
     necessary
      - speedup up to 10x
      - smaller final stream produced (no redundant utimes commands
        issued)
      - compatibility not affected

   - fiemap: skip backref checks for shared leaves
      - speedup 3x on sample filesystem with all leaves shared (e.g. on
        snapshots)

   - micro optimized b-tree key lookup, speedup in metadata operations
     (sample benchmark: fs_mark +10% of files/sec)

  Core changes:

   - change where checksumming is done in the io path:
      - checksum and read repair does verification at lower layer
      - cascaded cleanups and simplifications

   - raid56 refactoring and cleanups

  Fixes:

   - sysfs: make sure that a run-time change of a feature is correctly
     tracked by the feature files

   - scrub: better reporting of tree block errors

  Other:

   - locally enable -Wmaybe-uninitialized after fixing all warnings

   - misc cleanups, spelling fixes

  Other code:

   - block: export bio_split_rw

   - iomap: remove IOMAP_F_ZONE_APPEND"

* tag 'for-6.3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (109 commits)
  btrfs: make kobj_type structures constant
  btrfs: remove the bdev argument to btrfs_rmap_block
  btrfs: don't rely on unchanging ->bi_bdev for zone append remaps
  btrfs: never return true for reads in btrfs_use_zone_append
  btrfs: pass a btrfs_bio to btrfs_use_append
  btrfs: set bbio->file_offset in alloc_new_bio
  btrfs: use file_offset to limit bios size in calc_bio_boundaries
  btrfs: do unsigned integer division in the extent buffer binary search loop
  btrfs: eliminate extra call when doing binary search on extent buffer
  btrfs: raid56: handle endio in scrub_rbio
  btrfs: raid56: handle endio in recover_rbio
  btrfs: raid56: handle endio in rmw_rbio
  btrfs: raid56: submit the read bios from scrub_assemble_read_bios
  btrfs: raid56: fold rmw_read_wait_recover into rmw_read_bios
  btrfs: raid56: fold recover_assemble_read_bios into recover_rbio
  btrfs: raid56: add a bio_list_put helper
  btrfs: raid56: wait for I/O completion in submit_read_bios
  btrfs: raid56: simplify code flow in rmw_rbio
  btrfs: raid56: simplify error handling and code flow in raid56_parity_write
  btrfs: replace btrfs_wait_tree_block_writeback by wait_on_extent_buffer_writeback
  ...

3 files changed, 109 insertions, 25 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index c1da63f6c808..d766be7152e1 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -12,6 +12,8 @@
 
 #define BIO_MAX_VECS		256U
 
+struct queue_limits;
+
 static inline unsigned int bio_max_segs(unsigned int nr_segs)
 {
 	return min(nr_segs, BIO_MAX_VECS);
@@ -375,6 +377,8 @@ static inline void bip_set_seed(struct bio_integrity_payload *bip,
 void bio_trim(struct bio *bio, sector_t offset, sector_t size);
 extern struct bio *bio_split(struct bio *bio, int sectors,
 			     gfp_t gfp, struct bio_set *bs);
+struct bio *bio_split_rw(struct bio *bio, const struct queue_limits *lim,
+		unsigned *segs, struct bio_set *bs, unsigned max_bytes);
 
 /**
  * bio_next_split - get next @sectors from a bio, splitting if necessary
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 0983dfc9a203..fca43a4bd96b 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -58,8 +58,7 @@ struct vm_fault;
 #define IOMAP_F_SHARED		(1U << 2)
 #define IOMAP_F_MERGED		(1U << 3)
 #define IOMAP_F_BUFFER_HEAD	(1U << 4)
-#define IOMAP_F_ZONE_APPEND	(1U << 5)
-#define IOMAP_F_XATTR		(1U << 6)
+#define IOMAP_F_XATTR		(1U << 5)
 
 /*
  * Flags set by the core iomap code during operations:
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 6548b5b5aa60..75d7d22c3a27 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -32,6 +32,7 @@ struct prelim_ref;
 struct btrfs_space_info;
 struct btrfs_raid_bio;
 struct raid56_bio_trace_info;
+struct find_free_extent_ctl;
 
 #define show_ref_type(type)						\
 	__print_symbolic(type,						\
@@ -1241,76 +1242,156 @@ DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_free,
 
 TRACE_EVENT(find_free_extent,
 
-	TP_PROTO(const struct btrfs_root *root, u64 num_bytes,
-		 u64 empty_size, u64 data),
+	TP_PROTO(const struct btrfs_root *root,
+		 const struct find_free_extent_ctl *ffe_ctl),
 
-	TP_ARGS(root, num_bytes, empty_size, data),
+	TP_ARGS(root, ffe_ctl),
 
 	TP_STRUCT__entry_btrfs(
 		__field(	u64,	root_objectid		)
 		__field(	u64,	num_bytes		)
 		__field(	u64,	empty_size		)
-		__field(	u64,	data			)
+		__field(	u64,	flags			)
 	),
 
 	TP_fast_assign_btrfs(root->fs_info,
 		__entry->root_objectid	= root->root_key.objectid;
-		__entry->num_bytes	= num_bytes;
-		__entry->empty_size	= empty_size;
-		__entry->data		= data;
+		__entry->num_bytes	= ffe_ctl->num_bytes;
+		__entry->empty_size	= ffe_ctl->empty_size;
+		__entry->flags		= ffe_ctl->flags;
 	),
 
 	TP_printk_btrfs("root=%llu(%s) len=%llu empty_size=%llu flags=%llu(%s)",
 		  show_root_type(__entry->root_objectid),
-		  __entry->num_bytes, __entry->empty_size, __entry->data,
-		  __print_flags((unsigned long)__entry->data, "|",
+		  __entry->num_bytes, __entry->empty_size, __entry->flags,
+		  __print_flags((unsigned long)__entry->flags, "|",
+				 BTRFS_GROUP_FLAGS))
+);
+
+TRACE_EVENT(find_free_extent_search_loop,
+
+	TP_PROTO(const struct btrfs_root *root,
+		 const struct find_free_extent_ctl *ffe_ctl),
+
+	TP_ARGS(root, ffe_ctl),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	root_objectid		)
+		__field(	u64,	num_bytes		)
+		__field(	u64,	empty_size		)
+		__field(	u64,	flags			)
+		__field(	u64,	loop			)
+	),
+
+	TP_fast_assign_btrfs(root->fs_info,
+		__entry->root_objectid	= root->root_key.objectid;
+		__entry->num_bytes	= ffe_ctl->num_bytes;
+		__entry->empty_size	= ffe_ctl->empty_size;
+		__entry->flags		= ffe_ctl->flags;
+		__entry->loop		= ffe_ctl->loop;
+	),
+
+	TP_printk_btrfs("root=%llu(%s) len=%llu empty_size=%llu flags=%llu(%s) loop=%llu",
+		  show_root_type(__entry->root_objectid),
+		  __entry->num_bytes, __entry->empty_size, __entry->flags,
+		  __print_flags((unsigned long)__entry->flags, "|", BTRFS_GROUP_FLAGS),
+		  __entry->loop)
+);
+
+TRACE_EVENT(find_free_extent_have_block_group,
+
+	TP_PROTO(const struct btrfs_root *root,
+		 const struct find_free_extent_ctl *ffe_ctl,
+		 const struct btrfs_block_group *block_group),
+
+	TP_ARGS(root, ffe_ctl, block_group),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	root_objectid		)
+		__field(	u64,	num_bytes		)
+		__field(	u64,	empty_size		)
+		__field(	u64,	flags			)
+		__field(	u64,	loop			)
+		__field(	bool,	hinted			)
+		__field(	u64,	bg_start		)
+		__field(	u64,	bg_flags		)
+	),
+
+	TP_fast_assign_btrfs(root->fs_info,
+		__entry->root_objectid	= root->root_key.objectid;
+		__entry->num_bytes	= ffe_ctl->num_bytes;
+		__entry->empty_size	= ffe_ctl->empty_size;
+		__entry->flags		= ffe_ctl->flags;
+		__entry->loop		= ffe_ctl->loop;
+		__entry->hinted		= ffe_ctl->hinted;
+		__entry->bg_start	= block_group->start;
+		__entry->bg_flags	= block_group->flags;
+	),
+
+	TP_printk_btrfs(
+"root=%llu(%s) len=%llu empty_size=%llu flags=%llu(%s) loop=%llu hinted=%d block_group=%llu bg_flags=%llu(%s)",
+		  show_root_type(__entry->root_objectid),
+		  __entry->num_bytes, __entry->empty_size, __entry->flags,
+		  __print_flags((unsigned long)__entry->flags, "|", BTRFS_GROUP_FLAGS),
+		  __entry->loop, __entry->hinted,
+		  __entry->bg_start, __entry->bg_flags,
+		  __print_flags((unsigned long)__entry->bg_flags, "|",
 				 BTRFS_GROUP_FLAGS))
 );
 
 DECLARE_EVENT_CLASS(btrfs__reserve_extent,
 
-	TP_PROTO(const struct btrfs_block_group *block_group, u64 start,
-		 u64 len),
+	TP_PROTO(const struct btrfs_block_group *block_group,
+		 const struct find_free_extent_ctl *ffe_ctl),
 
-	TP_ARGS(block_group, start, len),
+	TP_ARGS(block_group, ffe_ctl),
 
 	TP_STRUCT__entry_btrfs(
 		__field(	u64,	bg_objectid		)
 		__field(	u64,	flags			)
+		__field(	int,	bg_size_class		)
 		__field(	u64,	start			)
 		__field(	u64,	len			)
+		__field(	u64,	loop			)
+		__field(	bool,	hinted			)
+		__field(	int,	size_class		)
 	),
 
 	TP_fast_assign_btrfs(block_group->fs_info,
 		__entry->bg_objectid	= block_group->start;
 		__entry->flags		= block_group->flags;
-		__entry->start		= start;
-		__entry->len		= len;
+		__entry->bg_size_class	= block_group->size_class;
+		__entry->start		= ffe_ctl->search_start;
+		__entry->len		= ffe_ctl->num_bytes;
+		__entry->loop		= ffe_ctl->loop;
+		__entry->hinted		= ffe_ctl->hinted;
+		__entry->size_class	= ffe_ctl->size_class;
 	),
 
-	TP_printk_btrfs("root=%llu(%s) block_group=%llu flags=%llu(%s) "
-		  "start=%llu len=%llu",
+	TP_printk_btrfs(
+"root=%llu(%s) block_group=%llu flags=%llu(%s) bg_size_class=%d start=%llu len=%llu loop=%llu hinted=%d size_class=%d",
 		  show_root_type(BTRFS_EXTENT_TREE_OBJECTID),
 		  __entry->bg_objectid,
 		  __entry->flags, __print_flags((unsigned long)__entry->flags,
 						"|", BTRFS_GROUP_FLAGS),
-		  __entry->start, __entry->len)
+		  __entry->bg_size_class, __entry->start, __entry->len,
+		  __entry->loop, __entry->hinted, __entry->size_class)
 );
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent,
 
-	TP_PROTO(const struct btrfs_block_group *block_group, u64 start,
-		 u64 len),
+	TP_PROTO(const struct btrfs_block_group *block_group,
+		 const struct find_free_extent_ctl *ffe_ctl),
 
-	TP_ARGS(block_group, start, len)
+	TP_ARGS(block_group, ffe_ctl)
 );
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent_cluster,
 
-	TP_PROTO(const struct btrfs_block_group *block_group, u64 start,
-		 u64 len),
+	TP_PROTO(const struct btrfs_block_group *block_group,
+		 const struct find_free_extent_ctl *ffe_ctl),
 
-	TP_ARGS(block_group, start, len)
+	TP_ARGS(block_group, ffe_ctl)
 );
 
 TRACE_EVENT(btrfs_find_cluster,