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Christoph Hellwig f9259be6a9 init: allow mounting arbitrary non-blockdevice filesystems as root

Currently the only non-blockdevice filesystems that can be used as the
initial root filesystem are NFS and CIFS, which use the magic
"root=/dev/nfs" and "root=/dev/cifs" syntax that requires the root
device file system details to come from filesystem specific kernel
command line options.

Add a little bit of new code that allows to just pass arbitrary
string mount options to any non-blockdevice filesystems so that it can
be mounted as the root file system.

For example a virtiofs root file system can be mounted using the
following syntax:

"root=myfs rootfstype=virtiofs rw"

Based on an earlier patch from Vivek Goyal <vgoyal@redhat.com>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2021-08-23 01:25:40 -04:00

calibrate.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

do_mounts_initrd.c

Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2020-08-07 09:40:34 -07:00

do_mounts_rd.c

init: add an init_unlink helper

2020-07-31 08:17:52 +02:00

do_mounts.c

init: allow mounting arbitrary non-blockdevice filesystems as root