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 4/6] erofs: introduce a pseudo mnt to manage shared cookies
Date: Fri, 16 Sep 2022 11:19:02 +0800 [thread overview]
Message-ID: <6a716712-4a82-32d7-ddcd-3252f69c6454@linux.alibaba.com> (raw)
In-Reply-To: <20220915124213.25767-5-zhujia.zj@bytedance.com>
On 9/15/22 8:42 PM, Jia Zhu wrote:
> static int erofs_init_fs_context(struct fs_context *fc)
> {
> - struct erofs_fs_context *ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> + struct erofs_fs_context *ctx;
> +
We'd better add a simple comment here:
+ /* pseudo mount for anon inodes */
> + if (fc->sb_flags & SB_KERNMOUNT) {
> + fc->ops = &erofs_anon_context_ops;
> + return 0;
> + }
which will be more friendly to those not familiar with the background.
>
> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> if (!ctx)
> return -ENOMEM;
> ctx->devs = kzalloc(sizeof(struct erofs_dev_context), GFP_KERNEL);
> @@ -874,6 +896,11 @@ static void erofs_kill_sb(struct super_block *sb)
>
> WARN_ON(sb->s_magic != EROFS_SUPER_MAGIC);
>
> + if (sb->s_flags & SB_KERNMOUNT) {
> + kill_litter_super(sb);
I think kill_anon_super() is enough. At least in our case, there's only
one root dentry inside the anon super and thus d_genocide() is actually
a noop.
Otherwise LGTM.
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
--
Thanks,
Jingbo
next prev parent reply other threads:[~2022-09-16 3:19 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 [this message]
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
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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