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ext4: add a hole extent entry in cache after punch

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In order to cache hole extents in the extent status tree and keep the
hole length as long as possible, re-add a hole entry to the cache just
after punching a hole.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240127015825.1608160-5-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Zhang Yi 2024-01-27 09:58:03 +08:00 committed by Theodore Ts'o
parent 6430dea07e
commit 9f1118223a
1 changed files with 4 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
fs/ext4/inode.c
View file

@ -4007,12 +4007,12 @@ int ext4_punch_hole(struct file *file, loff_t offset, loff_t length)
/* If there are blocks to remove, do it */
if (stop_block > first_block) {
ext4_lblk_t hole_len = stop_block - first_block;
down_write(&EXT4_I(inode)->i_data_sem);
ext4_discard_preallocations(inode);
ext4_es_remove_extent(inode, first_block,
stop_block - first_block);
ext4_es_remove_extent(inode, first_block, hole_len);
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
ret = ext4_ext_remove_space(inode, first_block,
@ -4021,6 +4021,8 @@ 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_es_insert_extent(inode, first_block, hole_len, ~0,
EXTENT_STATUS_HOLE);
up_write(&EXT4_I(inode)->i_data_sem);
}
ext4_fc_track_range(handle, inode, first_block, stop_block);