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Message-ID: <20240807174818.bt6b4qhub7ydy5r5@quack3>
Date: Wed, 7 Aug 2024 19:48:18 +0200
From: Jan Kara <jack@...e.cz>
To: Zhang Yi <yi.zhang@...weicloud.com>
Cc: linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, tytso@....edu,
adilger.kernel@...ger.ca, jack@...e.cz, ritesh.list@...il.com,
yi.zhang@...wei.com, chengzhihao1@...wei.com, yukuai3@...wei.com
Subject: Re: [PATCH v2 09/10] ext4: drop ext4_es_is_delonly()
On Fri 02-08-24 19:51:19, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@...wei.com>
>
> 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@...wei.com>
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@...e.com>
SUSE Labs, CR
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