diff options
| author | Rob Landley <rob@landley.net> | 2013-09-11 14:26:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:59:37 -0700 |
| commit | 57f150a58c40cda598c31af8bceb8598f43c3e5f (patch) | |
| tree | fde3e7fc48c97f0db5b3975fd74e12773f423fe2 /init | |
| parent | 4bbee76bc986af326be0a84ad661000cf89b29f6 (diff) | |
initmpfs: move rootfs code from fs/ramfs/ to init/
When the rootfs code was a wrapper around ramfs, having them in the same
file made sense. Now that it can wrap another filesystem type, move it in
with the init code instead.
This also allows a subsequent patch to access rootfstype= command line
arg.
Signed-off-by: Rob Landley <rob@landley.net>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/do_mounts.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c index 816014c4627..5d8d48fd0ee 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -26,6 +26,7 @@ #include <linux/async.h> #include <linux/fs_struct.h> #include <linux/slab.h> +#include <linux/ramfs.h> #include <linux/nfs_fs.h> #include <linux/nfs_fs_sb.h> @@ -588,3 +589,34 @@ out: sys_mount(".", "/", NULL, MS_MOVE, NULL); sys_chroot("."); } + +static struct dentry *rootfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + static unsigned long once; + + if (test_and_set_bit(0, &once)) + return ERR_PTR(-ENODEV); + + return mount_nodev(fs_type, flags, data, ramfs_fill_super); +} + +static struct file_system_type rootfs_fs_type = { + .name = "rootfs", + .mount = rootfs_mount, + .kill_sb = kill_litter_super, +}; + +int __init init_rootfs(void) +{ + int err = register_filesystem(&rootfs_fs_type); + + if (err) + return err; + + err = init_ramfs_fs(); + if (err) + unregister_filesystem(&rootfs_fs_type); + + return err; +} |