linux-kernel - Re: [PATCH] ceph: add column 'mds' to show caps in more user friendly

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Date:   Mon, 24 Aug 2020 11:12:54 -0400
From:   Jeff Layton <jlayton@...nel.org>
To:     Yanhu Cao <gmayyyha@...il.com>
Cc:     idryomov@...il.com, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ceph: add column 'mds' to show caps in more user
 friendly

On Mon, 2020-08-24 at 11:00 +0800, Yanhu Cao wrote:
> In multi-mds, the 'caps' debugfs file will have duplicate ino,
> add the 'mds' column to indicate which mds session the cap belongs to.
> 
> Signed-off-by: Yanhu Cao <gmayyyha@...il.com>
> ---
>  fs/ceph/debugfs.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
> index 97539b497e4c..47f8971a9c52 100644
> --- a/fs/ceph/debugfs.c
> +++ b/fs/ceph/debugfs.c
> @@ -202,7 +202,8 @@ static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
>  {
>  	struct seq_file *s = p;
>  
> -	seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino,
> +	seq_printf(s, "0x%-17lx%-3d%-17s%-17s\n", inode->i_ino,
> +		   cap->session->s_mds,
>  		   ceph_cap_string(cap->issued),
>  		   ceph_cap_string(cap->implemented));
>  	return 0;
> @@ -222,8 +223,8 @@ static int caps_show(struct seq_file *s, void *p)
>  		   "reserved\t%d\n"
>  		   "min\t\t%d\n\n",
>  		   total, avail, used, reserved, min);
> -	seq_printf(s, "ino                issued           implemented\n");
> -	seq_printf(s, "-----------------------------------------------\n");
> +	seq_printf(s, "ino              mds  issued           implemented\n");
> +	seq_printf(s, "--------------------------------------------------\n");
>  
>  	mutex_lock(&mdsc->mutex);
>  	for (i = 0; i < mdsc->max_sessions; i++) {

Looks good. Merged.

Thanks!
-- 
Jeff Layton <jlayton@...nel.org>