6.6-stable review patch. If anyone has any objections, please let me know.
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From: Zhang Yi yi.zhang@huawei.com
[ Upstream commit 3fcc2b887a1ba4c1f45319cd8c54daa263ecbc36 ]
Refactor and cleanup ext4_da_map_blocks(), reduce some unnecessary parameters and branches, no logic changes.
Signed-off-by: Zhang Yi yi.zhang@huawei.com Reviewed-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20240127015825.1608160-2-yi.zhang@huaweicloud.com Signed-off-by: Theodore Ts'o tytso@mit.edu Stable-dep-of: 0ea6560abb3b ("ext4: check the extent status again before inserting delalloc block") Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ext4/inode.c | 39 +++++++++++++++++---------------------- 1 file changed, 17 insertions(+), 22 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index d5eb8d44c6c81..b8eab9cf36b98 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1706,7 +1706,6 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, /* Lookup extent status tree firstly */ if (ext4_es_lookup_extent(inode, iblock, NULL, &es)) { if (ext4_es_is_hole(&es)) { - retval = 0; down_read(&EXT4_I(inode)->i_data_sem); goto add_delayed; } @@ -1751,26 +1750,9 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, retval = ext4_ext_map_blocks(NULL, inode, map, 0); else retval = ext4_ind_map_blocks(NULL, inode, map, 0); - -add_delayed: - if (retval == 0) { - int ret; - - /* - * XXX: __block_prepare_write() unmaps passed block, - * is it OK? - */ - - ret = ext4_insert_delayed_block(inode, map->m_lblk); - if (ret != 0) { - retval = ret; - goto out_unlock; - } - - map_bh(bh, inode->i_sb, invalid_block); - set_buffer_new(bh); - set_buffer_delay(bh); - } else if (retval > 0) { + if (retval < 0) + goto out_unlock; + if (retval > 0) { unsigned int status;
if (unlikely(retval != map->m_len)) { @@ -1785,11 +1767,24 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; ext4_es_insert_extent(inode, map->m_lblk, map->m_len, map->m_pblk, status); + goto out_unlock; }
+add_delayed: + /* + * XXX: __block_prepare_write() unmaps passed block, + * is it OK? + */ + retval = ext4_insert_delayed_block(inode, map->m_lblk); + if (retval) + goto out_unlock; + + map_bh(bh, inode->i_sb, invalid_block); + set_buffer_new(bh); + set_buffer_delay(bh); + out_unlock: up_read((&EXT4_I(inode)->i_data_sem)); - return retval; }