From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/sysfs/mount.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 kernel/fs/sysfs/mount.c (limited to 'kernel/fs/sysfs/mount.c') diff --git a/kernel/fs/sysfs/mount.c b/kernel/fs/sysfs/mount.c new file mode 100644 index 000000000..1c6ac6fce --- /dev/null +++ b/kernel/fs/sysfs/mount.c @@ -0,0 +1,79 @@ +/* + * fs/sysfs/symlink.c - operations for initializing and mounting sysfs + * + * Copyright (c) 2001-3 Patrick Mochel + * Copyright (c) 2007 SUSE Linux Products GmbH + * Copyright (c) 2007 Tejun Heo + * + * This file is released under the GPLv2. + * + * Please see Documentation/filesystems/sysfs.txt for more information. + */ + +#define DEBUG + +#include +#include +#include +#include +#include + +#include "sysfs.h" + +static struct kernfs_root *sysfs_root; +struct kernfs_node *sysfs_root_kn; + +static struct dentry *sysfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + struct dentry *root; + void *ns; + bool new_sb; + + if (!(flags & MS_KERNMOUNT)) { + if (!kobj_ns_current_may_mount(KOBJ_NS_TYPE_NET)) + return ERR_PTR(-EPERM); + } + + ns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET); + root = kernfs_mount_ns(fs_type, flags, sysfs_root, + SYSFS_MAGIC, &new_sb, ns); + if (IS_ERR(root) || !new_sb) + kobj_ns_drop(KOBJ_NS_TYPE_NET, ns); + return root; +} + +static void sysfs_kill_sb(struct super_block *sb) +{ + void *ns = (void *)kernfs_super_ns(sb); + + kernfs_kill_sb(sb); + kobj_ns_drop(KOBJ_NS_TYPE_NET, ns); +} + +static struct file_system_type sysfs_fs_type = { + .name = "sysfs", + .mount = sysfs_mount, + .kill_sb = sysfs_kill_sb, + .fs_flags = FS_USERNS_VISIBLE | FS_USERNS_MOUNT, +}; + +int __init sysfs_init(void) +{ + int err; + + sysfs_root = kernfs_create_root(NULL, KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK, + NULL); + if (IS_ERR(sysfs_root)) + return PTR_ERR(sysfs_root); + + sysfs_root_kn = sysfs_root->kn; + + err = register_filesystem(&sysfs_fs_type); + if (err) { + kernfs_destroy_root(sysfs_root); + return err; + } + + return 0; +} -- cgit 1.2.3-korg