Merge tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "A few more fixes:

   - fix unaligned compressed writes in zoned mode

   - fix false positive lockdep warning when cloning inline extent

   - remove wrong BUG_ON in tree-log error handling"

* tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: zoned: fix parallel compressed writes
  btrfs: zoned: pass start block to btrfs_use_zone_append
  btrfs: do not BUG_ON in link_to_fixup_dir
  btrfs: release path before starting transaction when cloning inline extent

fs/btrfs/compression.c

@@ -28,6 +28,7 @@
 #include "compression.h"
 #include "extent_io.h"
 #include "extent_map.h"
+#include "zoned.h"
 
 static const char* const btrfs_compress_types[] = { "", "zlib", "lzo", "zstd" };
 
@@ -349,6 +350,7 @@ static void end_compressed_bio_write(struct bio *bio)
 	 */
 	inode = cb->inode;
 	cb->compressed_pages[0]->mapping = cb->inode->i_mapping;
+	btrfs_record_physical_zoned(inode, cb->start, bio);
 	btrfs_writepage_endio_finish_ordered(cb->compressed_pages[0],
 			cb->start, cb->start + cb->len - 1,
 			bio->bi_status == BLK_STS_OK);
@@ -401,6 +403,8 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
 	u64 first_byte = disk_start;
 	blk_status_t ret;
 	int skip_sum = inode->flags & BTRFS_INODE_NODATASUM;
+	const bool use_append = btrfs_use_zone_append(inode, disk_start);
+	const unsigned int bio_op = use_append ? REQ_OP_ZONE_APPEND : REQ_OP_WRITE;
 
 	WARN_ON(!PAGE_ALIGNED(start));
 	cb = kmalloc(compressed_bio_size(fs_info, compressed_len), GFP_NOFS);
@@ -418,10 +422,31 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
 	cb->nr_pages = nr_pages;
 
 	bio = btrfs_bio_alloc(first_byte);
-	bio->bi_opf = REQ_OP_WRITE | write_flags;
+	bio->bi_opf = bio_op | write_flags;
 	bio->bi_private = cb;
 	bio->bi_end_io = end_compressed_bio_write;
 
+	if (use_append) {
+		struct extent_map *em;
+		struct map_lookup *map;
+		struct block_device *bdev;
+
+		em = btrfs_get_chunk_map(fs_info, disk_start, PAGE_SIZE);
+		if (IS_ERR(em)) {
+			kfree(cb);
+			bio_put(bio);
+			return BLK_STS_NOTSUPP;
+		}
+
+		map = em->map_lookup;
+		/* We only support single profile for now */
+		ASSERT(map->num_stripes == 1);
+		bdev = map->stripes[0].dev->bdev;
+
+		bio_set_dev(bio, bdev);
+		free_extent_map(em);
+	}
+
 	if (blkcg_css) {
 		bio->bi_opf |= REQ_CGROUP_PUNT;
 		kthread_associate_blkcg(blkcg_css);
@@ -432,6 +457,7 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
 	bytes_left = compressed_len;
 	for (pg_index = 0; pg_index < cb->nr_pages; pg_index++) {
 		int submit = 0;
+		int len;
 
 		page = compressed_pages[pg_index];
 		page->mapping = inode->vfs_inode.i_mapping;
@@ -439,9 +465,13 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
 			submit = btrfs_bio_fits_in_stripe(page, PAGE_SIZE, bio,
 							  0);
 
+		if (pg_index == 0 && use_append)
+			len = bio_add_zone_append_page(bio, page, PAGE_SIZE, 0);
+		else
+			len = bio_add_page(bio, page, PAGE_SIZE, 0);
+
 		page->mapping = NULL;
-		if (submit || bio_add_page(bio, page, PAGE_SIZE, 0) <
+		if (submit || len < PAGE_SIZE) {
-		    PAGE_SIZE) {
 			/*
 			 * inc the count before we submit the bio so
 			 * we know the end IO handler won't happen before
@@ -465,11 +495,15 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start,
 			}
 
 			bio = btrfs_bio_alloc(first_byte);
-			bio->bi_opf = REQ_OP_WRITE | write_flags;
+			bio->bi_opf = bio_op | write_flags;
 			bio->bi_private = cb;
 			bio->bi_end_io = end_compressed_bio_write;
 			if (blkcg_css)
 				bio->bi_opf |= REQ_CGROUP_PUNT;
+			/*
+			 * Use bio_add_page() to ensure the bio has at least one
+			 * page.
+			 */
 			bio_add_page(bio, page, PAGE_SIZE, 0);
 		}
 		if (bytes_left < PAGE_SIZE) {

fs/btrfs/extent_io.c

@@ -3753,7 +3753,7 @@ static noinline_for_stack int __extent_writepage_io(struct btrfs_inode *inode,
 		/* Note that em_end from extent_map_end() is exclusive */
 		iosize = min(em_end, end + 1) - cur;
 
-		if (btrfs_use_zone_append(inode, em))
+		if (btrfs_use_zone_append(inode, em->block_start))
 			opf = REQ_OP_ZONE_APPEND;
 
 		free_extent_map(em);

fs/btrfs/inode.c

@@ -7786,7 +7786,7 @@ static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start,
 	iomap->bdev = fs_info->fs_devices->latest_bdev;
 	iomap->length = len;
 
-	if (write && btrfs_use_zone_append(BTRFS_I(inode), em))
+	if (write && btrfs_use_zone_append(BTRFS_I(inode), em->block_start))
 		iomap->flags |= IOMAP_F_ZONE_APPEND;
 
 	free_extent_map(em);

fs/btrfs/reflink.c

@@ -281,6 +281,11 @@ copy_inline_extent:
 	ret = btrfs_inode_set_file_extent_range(BTRFS_I(dst), 0, aligned_end);
 out:
 	if (!ret && !trans) {
+		/*
+		 * Release path before starting a new transaction so we don't
+		 * hold locks that would confuse lockdep.
+		 */
+		btrfs_release_path(path);
 		/*
 		 * No transaction here means we copied the inline extent into a
 		 * page of the destination inode.

fs/btrfs/tree-log.c

@@ -1858,8 +1858,6 @@ static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans,
 		ret = btrfs_update_inode(trans, root, BTRFS_I(inode));
 	} else if (ret == -EEXIST) {
 		ret = 0;
-	} else {
-		BUG(); /* Logic Error */
 	}
 	iput(inode);
 

fs/btrfs/zoned.c

@@ -1278,7 +1278,7 @@ void btrfs_free_redirty_list(struct btrfs_transaction *trans)
 	spin_unlock(&trans->releasing_ebs_lock);
 }
 
-bool btrfs_use_zone_append(struct btrfs_inode *inode, struct extent_map *em)
+bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
 {
 	struct btrfs_fs_info *fs_info = inode->root->fs_info;
 	struct btrfs_block_group *cache;
@@ -1293,7 +1293,7 @@ bool btrfs_use_zone_append(struct btrfs_inode *inode, struct extent_map *em)
 	if (!is_data_inode(&inode->vfs_inode))
 		return false;
 
-	cache = btrfs_lookup_block_group(fs_info, em->block_start);
+	cache = btrfs_lookup_block_group(fs_info, start);
 	ASSERT(cache);
 	if (!cache)
 		return false;

fs/btrfs/zoned.h

@@ -53,7 +53,7 @@ void btrfs_calc_zone_unusable(struct btrfs_block_group *cache);
 void btrfs_redirty_list_add(struct btrfs_transaction *trans,
 			    struct extent_buffer *eb);
 void btrfs_free_redirty_list(struct btrfs_transaction *trans);
-bool btrfs_use_zone_append(struct btrfs_inode *inode, struct extent_map *em);
+bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start);
 void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset,
 				 struct bio *bio);
 void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered);
@@ -152,8 +152,7 @@ static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans,
 					  struct extent_buffer *eb) { }
 static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { }
 
-static inline bool btrfs_use_zone_append(struct btrfs_inode *inode,
+static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
-					 struct extent_map *em)
 {
 	return false;
 }