From: JeffleXu <jefflexu@linux.alibaba.com>
To: Jia Zhu <zhujia.zj@bytedance.com>, linux-erofs@lists.ozlabs.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
yinxin.x@bytedance.com
Subject: Re: [PATCH V4 5/6] erofs: Support sharing cookies in the same domain
Date: Fri, 16 Sep 2022 11:45:12 +0800 [thread overview]
Message-ID: <1ccf326e-dd47-d5cf-02ab-5f033892a7d4@linux.alibaba.com> (raw)
In-Reply-To: <20220915124213.25767-6-zhujia.zj@bytedance.com>
On 9/15/22 8:42 PM, Jia Zhu wrote:
> +static
> +struct erofs_fscache *erofs_fscache_domain_init_cookie(struct super_block *sb,
> + char *name, bool need_inode)
> +{
> + int err;
> + struct inode *inode;
> + struct erofs_fscache *ctx;
> + struct erofs_domain *domain = EROFS_SB(sb)->domain;
> +
> + ctx = erofs_fscache_acquire_cookie(sb, name, need_inode);
> + if (IS_ERR(ctx))
> + return ctx;
> +
> + ctx->name = kstrdup(name, GFP_KERNEL);
> + if (!ctx->name) {
> + err = -ENOMEM;
> + goto out;
> + }
> +
> + inode = new_inode(erofs_pseudo_mnt->mnt_sb);
> + if (!inode) {
> + kfree(ctx->name);
> + err = -ENOMEM;
> + goto out;
> + }
> +
> + ctx->domain = domain;
> + ctx->anon_inode = inode;
> + inode->i_private = ctx;
> + refcount_inc(&domain->ref);
> + return ctx;
> +out:
> + fscache_unuse_cookie(ctx->cookie, NULL, NULL);
> + fscache_relinquish_cookie(ctx->cookie, false);
> + if (need_inode)
> + iput(ctx->inode);
> + kfree(ctx);
> + return ERR_PTR(err);
Could you please abstract the cleanup logic into one helper? like:
erofs_fscache_relinquish_cookie()
{
fscache_unuse_cookie(ctx->cookie, NULL, NULL);
fscache_relinquish_cookie(ctx->cookie, false);
iput(ctx->inode);
kfree(ctx->name);
kfree(ctx);
}
which could also be called in erofs_fscache_unregister_cookie().
> void erofs_fscache_unregister_cookie(struct erofs_fscache *ctx)
> {
> + bool drop;
> + struct erofs_domain *domain;
> +
> if (!ctx)
> return;
> + domain = ctx->domain;
> + if (domain) {
> + mutex_lock(&erofs_domain_cookies_lock);
> + drop = atomic_read(&ctx->anon_inode->i_count) == 1;
> + iput(ctx->anon_inode);
> + mutex_unlock(&erofs_domain_cookies_lock);
> + if (!drop)
> + return;
> + }
>
> fscache_unuse_cookie(ctx->cookie, NULL, NULL);
> fscache_relinquish_cookie(ctx->cookie, false);
> + erofs_fscache_domain_put(domain);
> iput(ctx->inode);
> + kfree(ctx->name);
> kfree(ctx);
> }
--
Thanks,
Jingbo
next prev parent reply other threads:[~2022-09-16 3:45 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-15 12:42 [PATCH V4 0/6] Introduce erofs shared domain Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-15 12:42 ` [PATCH V4 1/6] erofs: use kill_anon_super() to kill super in fscache mode Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 1:43 ` JeffleXu
2022-09-15 12:42 ` [PATCH V4 2/6] erofs: code clean up for fscache Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 2:02 ` JeffleXu
2022-09-15 12:42 ` [PATCH V4 3/6] erofs: introduce fscache-based domain Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 2:35 ` JeffleXu
2022-09-16 2:57 ` JeffleXu
2022-09-15 12:42 ` [PATCH V4 4/6] erofs: introduce a pseudo mnt to manage shared cookies Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 3:19 ` JeffleXu
2022-09-15 12:42 ` [PATCH V4 5/6] erofs: Support sharing cookies in the same domain Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 3:45 ` JeffleXu [this message]
2022-09-15 12:42 ` [PATCH V4 6/6] erofs: introduce 'domain_id' mount option Jia Zhu
2022-09-15 12:42 ` Jia Zhu
2022-09-16 5:10 ` JeffleXu
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