linux-kernel - [PATCH v3 0/3] support booting of arbitrary non-blockdevice file systems

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Message-Id: <20210714202321.59729-1-vgoyal@redhat.com>
Date:   Wed, 14 Jul 2021 16:23:18 -0400
From:   Vivek Goyal <vgoyal@...hat.com>
To:     viro@...iv.linux.org.uk
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        hch@....de, virtio-fs@...hat.com,
        v9fs-developer@...ts.sourceforge.net, stefanha@...hat.com,
        miklos@...redi.hu, Vivek Goyal <vgoyal@...hat.com>
Subject: [PATCH v3 0/3] support booting of arbitrary non-blockdevice file systems

Hi,

This is V3 of patches. Christoph had posted V2 here.

https://lore.kernel.org/linux-fsdevel/20210621062657.3641879-1-hch@lst.de/

There was a small issue in last patch series that list_bdev_fs_names()
did not put an extra '\0' at the end as current callers were expecting.

To fix this, I have modified list_bdev_fs_names() and split_fs_names()
to return number of null terminated strings they have parsed. And
modified callers to use that to loop through strings (instead of
relying on an extra null at the end).

Christoph was finding it hard to find time so I took his patches, 
added my changes in patch3 and reposting the patch series.

I have tested it with 9p, virtiofs and ext4 filesystems as rootfs
and it works for me.

Thanks
Vivek

Christoph Hellwig (3):
  init: split get_fs_names
  init: allow mounting arbitrary non-blockdevice filesystems as root
  fs: simplify get_filesystem_list / get_all_fs_names

 fs/filesystems.c   | 27 ++++++++------
 include/linux/fs.h |  2 +-
 init/do_mounts.c   | 90 +++++++++++++++++++++++++++++++++-------------
 3 files changed, 83 insertions(+), 36 deletions(-)

-- 
2.31.1