1 files changed, 48 insertions, 19 deletions

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 7929f054dda3..a2c82448b2e0 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -9,6 +9,7 @@
 #include <linux/btrfs_tree.h>
 #include "compression.h"
 #include "ulist.h"
+#include "misc.h"
 
 enum {
 	EXTENT_BUFFER_UPTODATE,
@@ -29,13 +30,15 @@ enum {
 };
 
 /* these are flags for __process_pages_contig */
-#define PAGE_UNLOCK		(1 << 0)
-/* Page starts writeback, clear dirty bit and set writeback bit */
-#define PAGE_START_WRITEBACK	(1 << 1)
-#define PAGE_END_WRITEBACK	(1 << 2)
-#define PAGE_SET_ORDERED	(1 << 3)
-#define PAGE_SET_ERROR		(1 << 4)
-#define PAGE_LOCK		(1 << 5)
+enum {
+	ENUM_BIT(PAGE_UNLOCK),
+	/* Page starts writeback, clear dirty bit and set writeback bit */
+	ENUM_BIT(PAGE_START_WRITEBACK),
+	ENUM_BIT(PAGE_END_WRITEBACK),
+	ENUM_BIT(PAGE_SET_ORDERED),
+	ENUM_BIT(PAGE_SET_ERROR),
+	ENUM_BIT(PAGE_LOCK),
+};
 
 /*
  * page->private values.  Every page that is controlled by the extent
@@ -63,17 +66,11 @@ struct btrfs_inode;
 struct btrfs_fs_info;
 struct io_failure_record;
 struct extent_io_tree;
+struct btrfs_tree_parent_check;
 
 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);
-
 #define INLINE_EXTENT_BUFFER_PAGES     (BTRFS_MAX_METADATA_BLOCKSIZE / PAGE_SIZE)
 struct extent_buffer {
 	u64 start;
@@ -99,6 +96,39 @@ struct extent_buffer {
 };
 
 /*
+ * Get the correct offset inside the page of extent buffer.
+ *
+ * @eb:		target extent buffer
+ * @start:	offset inside the extent buffer
+ *
+ * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
+ */
+static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
+					   unsigned long offset)
+{
+	/*
+	 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
+	 * to PAGE_SIZE, thus adding it won't cause any difference.
+	 *
+	 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
+	 * to the eb, thus we have to take the eb->start into consideration.
+	 */
+	return offset_in_page(offset + eb->start);
+}
+
+static inline unsigned long get_eb_page_index(unsigned long offset)
+{
+	/*
+	 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
+	 *
+	 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
+	 * and have ensured that all tree blocks are contained in one page,
+	 * thus we always get index == 0.
+	 */
+	return offset >> PAGE_SHIFT;
+}
+
+/*
  * Structure to record how many bytes and which ranges are set/cleared
  */
 struct extent_changeset {
@@ -174,8 +204,8 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
 #define WAIT_NONE	0
 #define WAIT_COMPLETE	1
 #define WAIT_PAGE_LOCK	2
-int read_extent_buffer_pages(struct extent_buffer *eb, int wait,
-			     int mirror_num);
+int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num,
+			     struct btrfs_tree_parent_check *parent_check);
 void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
 void btrfs_readahead_tree_block(struct btrfs_fs_info *fs_info,
 				u64 bytenr, u64 owner_root, u64 gen, int level);
@@ -248,7 +278,6 @@ int extent_invalidate_folio(struct extent_io_tree *tree,
 int btrfs_alloc_page_array(unsigned int nr_pages, struct page **page_array);
 
 void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
-int btrfs_repair_eb_io_failure(const struct extent_buffer *eb, int mirror_num);
 
 /*
  * When IO fails, either with EIO or csum verification fails, we
@@ -272,9 +301,9 @@ struct io_failure_record {
 	int num_copies;
 };
 
-int btrfs_repair_one_sector(struct inode *inode, struct btrfs_bio *failed_bbio,
+int btrfs_repair_one_sector(struct btrfs_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);