>From 10a93b6e5a2c7209c34937f946bf4a1e4b36e46d Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Tue, 15 Jan 2008 10:05:20 +0100
Subject: [PATCH] fs: add extent_map hooks to the address space operations
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
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