linux-ext4 - Re: [PATCH 3/3] ext4: Add support for FS_IOC

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Date: Fri, 15 Mar 2024 12:45:50 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christian Brauner <brauner@...nel.org>,
        Andreas Dilger <adilger.kernel@...ger.ca>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/3] ext4: Add support for FS_IOC_GETFSSYSFSPATH

On Thu, Mar 14, 2024 at 11:53:02PM -0400, Kent Overstreet wrote:
> the new sysfs path ioctl lets us get the /sys/fs/ path for a given
> filesystem in a fs agnostic way, potentially nudging us towards
> standarizing some of our reporting.
> 
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -5346,6 +5346,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
>  	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
>  #endif
>  	super_set_uuid(sb, es->s_uuid, sizeof(es->s_uuid));
> +	super_set_sysfs_name_bdev(sb);

Should we perhaps be hoisting this call up to the VFS layer, so that
all file systems would benefit?

					- Ted