From 56055d3ae4cc7fa6d2b10885f20269de8a989ed7 Mon Sep 17 00:00:00 2001 From: Amit Arora Date: Tue, 17 Jul 2007 21:42:38 -0400 Subject: write support for preallocated blocks This patch adds write support to the uninitialized extents that get created when a preallocation is done using fallocate(). It takes care of splitting the extents into multiple (upto three) extents and merging the new split extents with neighbouring ones, if possible. Signed-off-by: Amit Arora --- include/linux/ext4_fs_extents.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h index e3d5afc6f23..edf49ec89ea 100644 --- a/include/linux/ext4_fs_extents.h +++ b/include/linux/ext4_fs_extents.h @@ -205,6 +205,9 @@ static inline int ext4_ext_get_actual_len(struct ext4_extent *ext) extern int ext4_extent_tree_init(handle_t *, struct inode *); extern int ext4_ext_calc_credits_for_insert(struct inode *, struct ext4_ext_path *); +extern int ext4_ext_try_to_merge(struct inode *inode, + struct ext4_ext_path *path, + struct ext4_extent *); extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *); extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *); extern int ext4_ext_walk_space(struct inode *, unsigned long, unsigned long, ext_prepare_callback, void *); -- cgit v1.2.3