From: Zhang Yi <yi.zhang@xxxxxxxxxx>
In order to cache hole extents in the extent status tree and keep the
hole continuity as much as possible, add a hole entry to the cache after
punching a hole. It can reduce the 'hole' in some continuous hole extent
entries.
Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
---
fs/ext4/ext4.h | 3 +++
fs/ext4/extents.c | 5 ++---
fs/ext4/inode.c | 2 ++
3 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9418359b1d9d..c2ca28c6ec38 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3681,6 +3681,9 @@ extern int ext4_convert_unwritten_io_end_vec(handle_t *handle,
ext4_io_end_t *io_end);
extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
+extern void ext4_ext_put_gap_in_cache(struct inode *inode,
+ ext4_lblk_t hole_start,
+ ext4_lblk_t hole_len);
extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
int num,
struct ext4_ext_path *path);
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 202c76996b62..52bad225e3c8 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2275,9 +2275,8 @@ static ext4_lblk_t ext4_ext_determine_hole(struct inode *inode,
* calculate boundaries of the gap that the requested block fits into
* and cache this gap
*/
-static void
-ext4_ext_put_gap_in_cache(struct inode *inode, ext4_lblk_t hole_start,
- ext4_lblk_t hole_len)
+void ext4_ext_put_gap_in_cache(struct inode *inode, ext4_lblk_t hole_start,
+ ext4_lblk_t hole_len)
{
struct extent_status es;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 94e7b8500878..3908ce7f6fb8 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4034,6 +4034,8 @@ int ext4_punch_hole(struct file *file, loff_t offset, loff_t length)
ret = ext4_ind_remove_space(handle, inode, first_block,
stop_block);
+ ext4_ext_put_gap_in_cache(inode, first_block,
+ stop_block - first_block);
up_write(&EXT4_I(inode)->i_data_sem);
}
ext4_fc_track_range(handle, inode, first_block, stop_block);
--
2.39.2
