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Btrfs: add helper for em merge logic

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This is a prepare work for the following extent map selftest, which
runs tests against em merge logic.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Liu Bo
2018-01-05 12:51:10 -07:00
committed by David Sterba
parent 18e83ac75b
commit 7b4df058b0
2 changed files with 48 additions and 34 deletions
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2
fs/btrfs/ctree.h
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@@ -3143,6 +3143,8 @@ struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
int delay_iput);
void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
int btrfs_add_extent_mapping(struct extent_map_tree *em_tree,
struct extent_map **em_in, u64 start, u64 len);
struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
struct page *page, size_t pg_offset, u64 start,
u64 len, int create);