linux-kernel - Re: [PATCH] quota: fix to propagate error of mark_dquot

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Message-ID: <20240412121517.dydwqiqkdzvwpwf5@quack3>
Date: Fri, 12 Apr 2024 14:15:17 +0200
From: Jan Kara <jack@...e.cz>
To: Chao Yu <chao@...nel.org>
Cc: Jan Kara <jack@...e.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] quota: fix to propagate error of mark_dquot_dirty() to
 caller

On Fri 12-04-24 17:49:42, Chao Yu wrote:
> in order to let caller be aware of failure of mark_dquot_dirty().
> 
> Signed-off-by: Chao Yu <chao@...nel.org>

Thanks. I've added the patch to my tree.

								Honza

> ---
>  fs/quota/dquot.c | 21 ++++++++++++++-------
>  1 file changed, 14 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> index dacbee455c03..b2a109d8b198 100644
> --- a/fs/quota/dquot.c
> +++ b/fs/quota/dquot.c
> @@ -1737,7 +1737,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
>  
>  	if (reserve)
>  		goto out_flush_warn;
> -	mark_all_dquot_dirty(dquots);
> +	ret = mark_all_dquot_dirty(dquots);
>  out_flush_warn:
>  	srcu_read_unlock(&dquot_srcu, index);
>  	flush_warnings(warn);
> @@ -1786,7 +1786,7 @@ int dquot_alloc_inode(struct inode *inode)
>  warn_put_all:
>  	spin_unlock(&inode->i_lock);
>  	if (ret == 0)
> -		mark_all_dquot_dirty(dquots);
> +		ret = mark_all_dquot_dirty(dquots);
>  	srcu_read_unlock(&dquot_srcu, index);
>  	flush_warnings(warn);
>  	return ret;
> @@ -1990,7 +1990,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
>  	qsize_t inode_usage = 1;
>  	struct dquot __rcu **dquots;
>  	struct dquot *transfer_from[MAXQUOTAS] = {};
> -	int cnt, index, ret = 0;
> +	int cnt, index, ret = 0, err;
>  	char is_valid[MAXQUOTAS] = {};
>  	struct dquot_warn warn_to[MAXQUOTAS];
>  	struct dquot_warn warn_from_inodes[MAXQUOTAS];
> @@ -2087,8 +2087,12 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
>  	 * mark_all_dquot_dirty().
>  	 */
>  	index = srcu_read_lock(&dquot_srcu);
> -	mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
> -	mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
> +	err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
> +	if (err < 0)
> +		ret = err;
> +	err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
> +	if (err < 0)
> +		ret = err;
>  	srcu_read_unlock(&dquot_srcu, index);
>  
>  	flush_warnings(warn_to);
> @@ -2098,7 +2102,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
>  	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
>  		if (is_valid[cnt])
>  			transfer_to[cnt] = transfer_from[cnt];
> -	return 0;
> +	return ret;
>  over_quota:
>  	/* Back out changes we already did */
>  	for (cnt--; cnt >= 0; cnt--) {
> @@ -2726,6 +2730,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
>  	struct mem_dqblk *dm = &dquot->dq_dqb;
>  	int check_blim = 0, check_ilim = 0;
>  	struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
> +	int ret;
>  
>  	if (di->d_fieldmask & ~VFS_QC_MASK)
>  		return -EINVAL;
> @@ -2807,7 +2812,9 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
>  	else
>  		set_bit(DQ_FAKE_B, &dquot->dq_flags);
>  	spin_unlock(&dquot->dq_dqb_lock);
> -	mark_dquot_dirty(dquot);
> +	ret = mark_dquot_dirty(dquot);
> +	if (ret < 0)
> +		return ret;
>  
>  	return 0;
>  }
> -- 
> 2.40.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR