Re: [PATCH v2 09/10] ext4: drop ext4_es_is_delonly()

[Jan Kara]

On Fri 02-08-24 19:51:19, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@xxxxxxxxxx>
> 
> Since we don't add delayed flag in unwritten extents, so there is no
> difference between ext4_es_is_delayed() and ext4_es_is_delonly(),
> just drop ext4_es_is_delonly().
> 
> Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>

Looks good. But please also add assertion when inserting extent into status
tree that only one of EXTENT_STATUS_WRITTEN, EXTENT_STATUS_UNWRITTEN,
EXTENT_STATUS_DELAYED, and EXTENT_STATUS_HOLE is set.
Also perhaps add comment to EXTENT_STATUS_DELAYED (and other) definition that
these states are exclusive. Thanks!

									Honza

> ---
>  fs/ext4/extents_status.c | 18 +++++++++---------
>  fs/ext4/extents_status.h |  5 -----
>  fs/ext4/inode.c          |  4 ++--
>  3 files changed, 11 insertions(+), 16 deletions(-)
> 
> diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
> index e482ac818317..5fb0a02405ba 100644
> --- a/fs/ext4/extents_status.c
> +++ b/fs/ext4/extents_status.c
> @@ -563,8 +563,8 @@ static int ext4_es_can_be_merged(struct extent_status *es1,
>  	if (ext4_es_is_hole(es1))
>  		return 1;
>  
> -	/* we need to check delayed extent is without unwritten status */
> -	if (ext4_es_is_delayed(es1) && !ext4_es_is_unwritten(es1))
> +	/* we need to check delayed extent */
> +	if (ext4_es_is_delayed(es1))
>  		return 1;
>  
>  	return 0;
> @@ -1139,7 +1139,7 @@ static void count_rsvd(struct inode *inode, ext4_lblk_t lblk, long len,
>  	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
>  	ext4_lblk_t i, end, nclu;
>  
> -	if (!ext4_es_is_delonly(es))
> +	if (!ext4_es_is_delayed(es))
>  		return;
>  
>  	WARN_ON(len <= 0);
> @@ -1291,7 +1291,7 @@ static unsigned int get_rsvd(struct inode *inode, ext4_lblk_t end,
>  		es = rc->left_es;
>  		while (es && ext4_es_end(es) >=
>  		       EXT4_LBLK_CMASK(sbi, rc->first_do_lblk)) {
> -			if (ext4_es_is_delonly(es)) {
> +			if (ext4_es_is_delayed(es)) {
>  				rc->ndelonly_cluster--;
>  				left_delonly = true;
>  				break;
> @@ -1311,7 +1311,7 @@ static unsigned int get_rsvd(struct inode *inode, ext4_lblk_t end,
>  			}
>  			while (es && es->es_lblk <=
>  			       EXT4_LBLK_CFILL(sbi, rc->last_do_lblk)) {
> -				if (ext4_es_is_delonly(es)) {
> +				if (ext4_es_is_delayed(es)) {
>  					rc->ndelonly_cluster--;
>  					right_delonly = true;
>  					break;
> @@ -2239,7 +2239,7 @@ static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
>  	if (EXT4_B2C(sbi, lblk) == EXT4_B2C(sbi, end)) {
>  		first = EXT4_LBLK_CMASK(sbi, lblk);
>  		if (first != lblk)
> -			f_del = __es_scan_range(inode, &ext4_es_is_delonly,
> +			f_del = __es_scan_range(inode, &ext4_es_is_delayed,
>  						first, lblk - 1);
>  		if (f_del) {
>  			ret = __insert_pending(inode, first, prealloc);
> @@ -2251,7 +2251,7 @@ static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
>  			       sbi->s_cluster_ratio - 1;
>  			if (last != end)
>  				l_del = __es_scan_range(inode,
> -							&ext4_es_is_delonly,
> +							&ext4_es_is_delayed,
>  							end + 1, last);
>  			if (l_del) {
>  				ret = __insert_pending(inode, last, prealloc);
> @@ -2264,7 +2264,7 @@ static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
>  	} else {
>  		first = EXT4_LBLK_CMASK(sbi, lblk);
>  		if (first != lblk)
> -			f_del = __es_scan_range(inode, &ext4_es_is_delonly,
> +			f_del = __es_scan_range(inode, &ext4_es_is_delayed,
>  						first, lblk - 1);
>  		if (f_del) {
>  			ret = __insert_pending(inode, first, prealloc);
> @@ -2276,7 +2276,7 @@ static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
>  
>  		last = EXT4_LBLK_CMASK(sbi, end) + sbi->s_cluster_ratio - 1;
>  		if (last != end)
> -			l_del = __es_scan_range(inode, &ext4_es_is_delonly,
> +			l_del = __es_scan_range(inode, &ext4_es_is_delayed,
>  						end + 1, last);
>  		if (l_del) {
>  			ret = __insert_pending(inode, last, prealloc);
> diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
> index 5b49cb3b9aff..e484c60e55e3 100644
> --- a/fs/ext4/extents_status.h
> +++ b/fs/ext4/extents_status.h
> @@ -184,11 +184,6 @@ static inline int ext4_es_is_mapped(struct extent_status *es)
>  	return (ext4_es_is_written(es) || ext4_es_is_unwritten(es));
>  }
>  
> -static inline int ext4_es_is_delonly(struct extent_status *es)
> -{
> -	return (ext4_es_is_delayed(es) && !ext4_es_is_unwritten(es));
> -}
> -
>  static inline void ext4_es_set_referenced(struct extent_status *es)
>  {
>  	es->es_pblk |= ((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT;
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 8bd65a45a26a..2b301c165468 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -1645,7 +1645,7 @@ static int ext4_clu_alloc_state(struct inode *inode, ext4_lblk_t lblk)
>  	int ret;
>  
>  	/* Has delalloc reservation? */
> -	if (ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk))
> +	if (ext4_es_scan_clu(inode, &ext4_es_is_delayed, lblk))
>  		return 1;
>  
>  	/* Already been allocated? */
> @@ -1766,7 +1766,7 @@ static int ext4_da_map_blocks(struct inode *inode, struct ext4_map_blocks *map)
>  		 * Delayed extent could be allocated by fallocate.
>  		 * So we need to check it.
>  		 */
> -		if (ext4_es_is_delonly(&es)) {
> +		if (ext4_es_is_delayed(&es)) {
>  			map->m_flags |= EXT4_MAP_DELAYED;
>  			return 0;
>  		}
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR