linux-kernel - Re: [PATCH 1/8] kernfs: Add API to generate relative kernfs path

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Message-ID: <20151209213806.GP30240@mtj.duckdns.org>
Date:	Wed, 9 Dec 2015 16:38:06 -0500
From:	Tejun Heo <tj@...nel.org>
To:	serge.hallyn@...ntu.com
Cc:	linux-kernel@...r.kernel.org, adityakali@...gle.com,
	linux-api@...r.kernel.org, containers@...ts.linux-foundation.org,
	cgroups@...r.kernel.org, lxc-devel@...ts.linuxcontainers.org,
	akpm@...ux-foundation.org, ebiederm@...ssion.com,
	gregkh@...uxfoundation.org, lizefan@...wei.com, hannes@...xchg.org,
	"Serge E. Hallyn" <serge.hallyn@...onical.com>
Subject: Re: [PATCH 1/8] kernfs: Add API to generate relative kernfs path

Hello, Serge.

On Wed, Dec 09, 2015 at 01:28:54PM -0600, serge.hallyn@...ntu.com wrote:
> +/* kernfs_node_depth - compute depth from @from to @to */
> +static size_t kernfs_depth(struct kernfs_node *from, struct kernfs_node *to)
...
> +char *kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen)
> +{
> +	return kernfs_path_from_node(NULL, kn, buf, buflen);
> +}
...
> diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
> index 5d4e9c4..d025ebd 100644
> --- a/include/linux/kernfs.h
> +++ b/include/linux/kernfs.h
> @@ -267,6 +267,9 @@ static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
>  
>  int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen);
>  size_t kernfs_path_len(struct kernfs_node *kn);
> +char * __must_check kernfs_path_from_node(struct kernfs_node *root_kn,
> +					  struct kernfs_node *kn, char *buf,
> +					  size_t buflen);

I think I commented on the same thing before, but I think it'd make
more sense to put @from after @to and the prototype is using @root_kn
which is a bit confusing.  Was converting the path functions to return
length too much work?  If so, that's fine but please explain what
decisions were made.

I skimmed through the series and spotted several other review points
which didn't get addressed.  Can you please go over the previous
review cycle and address the review points?

Thanks.

-- 
tejun
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