btrfs: change how repair action is passed to btrfs_repair_one_sector

There's a function pointer passed to btrfs_repair_one_sector that will
submit the right bio for repair. However there are only two callbacks,
for buffered and for direct IO. This can be simplified to a bool-based
switch and call either function, indirect calls in this case is an
unnecessary abstraction. This allows to remove the submit_bio_hook_t
typedef.
Reviewed-by: NAnand Jain <anand.jain@oracle.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/btrfs_inode.h

@@ -414,6 +414,9 @@ static inline void btrfs_inode_split_flags(u64 inode_item_flags,
 void btrfs_submit_data_write_bio(struct inode *inode, struct bio *bio, int mirror_num);
 void btrfs_submit_data_read_bio(struct inode *inode, struct bio *bio,
 			int mirror_num, enum btrfs_compression_type compress_type);
+void btrfs_submit_dio_repair_bio(struct inode *inode, struct bio *bio,
+				 int mirror_num,
+				 enum btrfs_compression_type compress_type);
 int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page,
 			    u32 pgoff, u8 *csum, const u8 * const csum_expected);
 int btrfs_check_data_csum(struct inode *inode, struct btrfs_bio *bbio,

fs/btrfs/compression.c

@@ -196,7 +196,7 @@ static void end_compressed_bio_read(struct btrfs_bio *bbio)
 			refcount_inc(&cb->pending_ios);
 			ret = btrfs_repair_one_sector(inode, bbio, offset,
 						      bv.bv_page, bv.bv_offset,
-						      btrfs_submit_data_read_bio);
+						      true);
 			if (ret) {
 				refcount_dec(&cb->pending_ios);
 				status = errno_to_blk_status(ret);

fs/btrfs/extent_io.c

@@ -797,7 +797,7 @@ static struct io_failure_record *btrfs_get_io_failure_record(struct inode *inode
 
 int btrfs_repair_one_sector(struct inode *inode, struct btrfs_bio *failed_bbio,
 			    u32 bio_offset, struct page *page, unsigned int pgoff,
-			    submit_bio_hook_t *submit_bio_hook)
+			    bool submit_buffered)
 {
 	u64 start = failed_bbio->file_offset + bio_offset;
 	struct io_failure_record *failrec;
@@ -856,11 +856,15 @@ int btrfs_repair_one_sector(struct inode *inode, struct btrfs_bio *failed_bbio,
 		    failrec->this_mirror);
 
 	/*
-	 * At this point we have a bio, so any errors from submit_bio_hook()
-	 * will be handled by the endio on the repair_bio, so we can't return an
+	 * At this point we have a bio, so any errors from bio submission will
+	 * be handled by the endio on the repair_bio, so we can't return an
 	 * error here.
 	 */
-	submit_bio_hook(inode, repair_bio, failrec->this_mirror, 0);
+	if (submit_buffered)
+		btrfs_submit_data_read_bio(inode, repair_bio, failrec->this_mirror, 0);
+	else
+		btrfs_submit_dio_repair_bio(inode, repair_bio, failrec->this_mirror, 0);
+
 	return BLK_STS_OK;
 }
 
@@ -951,7 +955,7 @@ static void submit_data_read_repair(struct inode *inode,
 
 		ret = btrfs_repair_one_sector(inode, failed_bbio,
 				bio_offset + offset, page, pgoff + offset,
-				btrfs_submit_data_read_bio);
+				true);
 		if (!ret) {
 			/*
 			 * We have submitted the read repair, the page release

fs/btrfs/extent_io.h

@@ -70,10 +70,6 @@ struct extent_io_tree;
 int __init extent_buffer_init_cachep(void);
 void __cold extent_buffer_free_cachep(void);
 
-typedef void (submit_bio_hook_t)(struct inode *inode, struct bio *bio,
-					 int mirror_num,
-					 enum btrfs_compression_type compress_type);
-
 typedef blk_status_t (extent_submit_bio_start_t)(struct inode *inode,
 		struct bio *bio, u64 dio_file_offset);
 
@@ -277,7 +273,7 @@ struct io_failure_record {
 
 int btrfs_repair_one_sector(struct inode *inode, struct btrfs_bio *failed_bbio,
 			    u32 bio_offset, struct page *page, unsigned int pgoff,
-			    submit_bio_hook_t *submit_bio_hook);
+			    bool submit_buffered);
 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, u64 end);
 int btrfs_clean_io_failure(struct btrfs_inode *inode, u64 start,
 			   struct page *page, unsigned int pg_offset);

fs/btrfs/inode.c

@@ -7923,9 +7923,9 @@ static void btrfs_dio_private_put(struct btrfs_dio_private *dip)
 	bio_endio(&dip->bio);
 }
 
-static void submit_dio_repair_bio(struct inode *inode, struct bio *bio,
-				  int mirror_num,
-				  enum btrfs_compression_type compress_type)
+void btrfs_submit_dio_repair_bio(struct inode *inode, struct bio *bio,
+				 int mirror_num,
+				 enum btrfs_compression_type compress_type)
 {
 	struct btrfs_dio_private *dip = btrfs_bio(bio)->private;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
@@ -7960,8 +7960,7 @@ static blk_status_t btrfs_check_read_dio_bio(struct btrfs_dio_private *dip,
 			int ret;
 
 			ret = btrfs_repair_one_sector(inode, bbio, offset,
-					bv.bv_page, bv.bv_offset,
-					submit_dio_repair_bio);
+					bv.bv_page, bv.bv_offset, false);
 			if (ret)
 				err = errno_to_blk_status(ret);
 		}