[PATCH] fs: add extent_map hooks to the address space operations

[Chris Mason]

Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx>
---
 include/linux/fs.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b3ec4a4..faf677c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -439,6 +439,7 @@ static inline size_t iov_iter_count(struct iov_iter *i)
 }
 
 
+struct extent_map;
 struct address_space_operations {
 	int (*writepage)(struct page *page, struct writeback_control *wbc);
 	int (*readpage)(struct file *, struct page *);
@@ -479,6 +480,15 @@ struct address_space_operations {
 	int (*migratepage) (struct address_space *,
 			struct page *, struct page *);
 	int (*launder_page) (struct page *);
+
+	/* raw extent mapping to the disk */
+	struct extent_map *(*map_extent)(struct address_space *mapping,
+					 struct page *page,
+					 size_t page_offset,
+					 u64 start, u64 len, int create,
+					 gfp_t gfp_mask);
+	int (*extent_io_complete)(struct address_space *mapping,
+				  u64 start, u64 len);
 };
 
 /*
-- 
1.5.4.rc2.84.gf85fd


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Content-Type: text/x-patch; charset=us-ascii
Content-Disposition: inline; filename="0003-ext2-add-support-for-extent_map-API.patch"