Merge tag 'for-6.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "There's a bunch of performance improvements, most notably the FIEMAP
  speedup, the new block group tree to speed up mount on large
  filesystems, more io_uring integration, some sysfs exports and the
  usual fixes and core updates.

  Summary:

  Performance:

   - outstanding FIEMAP speed improvement
      - algorithmic change how extents are enumerated leads to orders of
        magnitude speed boost (uncached and cached)
      - extent sharing check speedup (2.2x uncached, 3x cached)
      - add more cancellation points, allowing to interrupt seeking in
        files with large number of extents
      - more efficient hole and data seeking (4x uncached, 1.3x cached)
      - sample results:
	    256M, 32K extents:   4s ->  29ms  (~150x)
	    512M, 64K extents:  30s ->  59ms  (~550x)
	    1G,  128K extents: 225s -> 120ms (~1800x)

   - improved inode logging, especially for directories (on dbench
     workload throughput +25%, max latency -21%)

   - improved buffered IO, remove redundant extent state tracking,
     lowering memory consumption and avoiding rb tree traversal

   - add sysfs tunable to let qgroup temporarily skip exact accounting
     when deleting snapshot, leading to a speedup but requiring a rescan
     after that, will be used by snapper

   - support io_uring and buffered writes, until now it was just for
     direct IO, with the no-wait semantics implemented in the buffered
     write path it now works and leads to speed improvement in IOPS
     (2x), throughput (2.2x), latency (depends, 2x to 150x)

   - small performance improvements when dropping and searching for
     extent maps as well as when flushing delalloc in COW mode
     (throughput +5MB/s)

  User visible changes:

   - new incompatible feature block-group-tree adding a dedicated tree
     for tracking block groups, this allows a much faster load during
     mount and avoids seeking unlike when it's scattered in the extent
     tree items
      - this reduces mount time for many-terabyte sized filesystems
      - conversion tool will be provided so existing filesystem can also
        be updated in place
      - to reduce test matrix and feature combinations requires no-holes
        and free-space-tree (mkfs defaults since 5.15)

   - improved reporting of super block corruption detected by scrub

   - scrub also tries to repair super block and does not wait until next
     commit

   - discard stats and tunables are exported in sysfs
     (/sys/fs/btrfs/FSID/discard)

   - qgroup status is exported in sysfs
     (/sys/sys/fs/btrfs/FSID/qgroups/)

   - verify that super block was not modified when thawing filesystem

  Fixes:

   - FIEMAP fixes
      - fix extent sharing status, does not depend on the cached status
        where merged
      - flush delalloc so compressed extents are reported correctly

   - fix alignment of VMA for memory mapped files on THP

   - send: fix failures when processing inodes with no links (orphan
     files and directories)

   - fix race between quota enable and quota rescan ioctl

   - handle more corner cases for read-only compat feature verification

   - fix missed extent on fsync after dropping extent maps

  Core:

   - lockdep annotations to validate various transactions states and
     state transitions

   - preliminary support for fs-verity in send

   - more effective memory use in scrub for subpage where sector is
     smaller than page

   - block group caching progress logic has been removed, load is now
     synchronous

   - simplify end IO callbacks and bio handling, use chained bios
     instead of own tracking

   - add no-wait semantics to several functions (tree search, nocow,
     flushing, buffered write

   - cleanups and refactoring

  MM changes:

   - export balance_dirty_pages_ratelimited_flags"

* tag 'for-6.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (177 commits)
  btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer
  btrfs: drop extent map range more efficiently
  btrfs: avoid pointless extent map tree search when flushing delalloc
  btrfs: remove unnecessary next extent map search
  btrfs: remove unnecessary NULL pointer checks when searching extent maps
  btrfs: assert tree is locked when clearing extent map from logging
  btrfs: remove unnecessary extent map initializations
  btrfs: remove the refcount warning/check at free_extent_map()
  btrfs: add helper to replace extent map range with a new extent map
  btrfs: move open coded extent map tree deletion out of inode eviction
  btrfs: use cond_resched_rwlock_write() during inode eviction
  btrfs: use extent_map_end() at btrfs_drop_extent_map_range()
  btrfs: move btrfs_drop_extent_cache() to extent_map.c
  btrfs: fix missed extent on fsync after dropping extent maps
  btrfs: remove stale prototype of btrfs_write_inode
  btrfs: enable nowait async buffered writes
  btrfs: assert nowait mode is not used for some btree search functions
  btrfs: make btrfs_buffered_write nowait compatible
  btrfs: plumb NOWAIT through the write path
  btrfs: make lock_and_cleanup_extent_if_need nowait compatible
  ...

1 files changed, 28 insertions, 6 deletions

diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h
index 9795dc295a18..0163ca637a96 100644
--- a/fs/btrfs/delayed-inode.h
+++ b/fs/btrfs/delayed-inode.h
@@ -16,9 +16,10 @@
 #include <linux/refcount.h>
 #include "ctree.h"
 
-/* types of the delayed item */
-#define BTRFS_DELAYED_INSERTION_ITEM	1
-#define BTRFS_DELAYED_DELETION_ITEM	2
+enum btrfs_delayed_item_type {
+	BTRFS_DELAYED_INSERTION_ITEM,
+	BTRFS_DELAYED_DELETION_ITEM
+};
 
 struct btrfs_delayed_root {
 	spinlock_t lock;
@@ -73,14 +74,27 @@ struct btrfs_delayed_node {
 
 struct btrfs_delayed_item {
 	struct rb_node rb_node;
-	struct btrfs_key key;
+	/* Offset value of the corresponding dir index key. */
+	u64 index;
 	struct list_head tree_list;	/* used for batch insert/delete items */
 	struct list_head readdir_list;	/* used for readdir items */
+	/*
+	 * Used when logging a directory.
+	 * Insertions and deletions to this list are protected by the parent
+	 * delayed node's mutex.
+	 */
+	struct list_head log_list;
 	u64 bytes_reserved;
 	struct btrfs_delayed_node *delayed_node;
 	refcount_t refs;
-	int ins_or_del;
-	u32 data_len;
+	enum btrfs_delayed_item_type type:8;
+	/*
+	 * Track if this delayed item was already logged.
+	 * Protected by the mutex of the parent delayed inode.
+	 */
+	bool logged;
+	/* The maximum leaf size is 64K, so u16 is more than enough. */
+	u16 data_len;
 	char data[];
 };
 
@@ -144,6 +158,14 @@ int btrfs_should_delete_dir_index(struct list_head *del_list,
 int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
 				    struct list_head *ins_list);
 
+/* Used during directory logging. */
+void btrfs_log_get_delayed_items(struct btrfs_inode *inode,
+				 struct list_head *ins_list,
+				 struct list_head *del_list);
+void btrfs_log_put_delayed_items(struct btrfs_inode *inode,
+				 struct list_head *ins_list,
+				 struct list_head *del_list);
+
 /* for init */
 int __init btrfs_delayed_inode_init(void);
 void __cold btrfs_delayed_inode_exit(void);