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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* fs/sysfs/symlink.c - operations for initializing and mounting sysfs
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*
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* Copyright (c) 2001-3 Patrick Mochel
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* Copyright (c) 2007 SUSE Linux Products GmbH
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* Copyright (c) 2007 Tejun Heo <teheo@suse.de>
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*
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* Please see Documentation/filesystems/sysfs.rst for more information.
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*/
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#include <linux/fs.h>
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#include <linux/magic.h>
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#include <linux/mount.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/user_namespace.h>
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#include <linux/fs_context.h>
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#include <net/net_namespace.h>
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#include "sysfs.h"
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static struct kernfs_root *sysfs_root;
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struct kernfs_node *sysfs_root_kn;
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static int sysfs_get_tree(struct fs_context *fc)
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{
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struct kernfs_fs_context *kfc = fc->fs_private;
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int ret;
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ret = kernfs_get_tree(fc);
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if (ret)
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return ret;
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if (kfc->new_sb_created)
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fc->root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;
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return 0;
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}
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static void sysfs_fs_context_free(struct fs_context *fc)
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{
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struct kernfs_fs_context *kfc = fc->fs_private;
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if (kfc->ns_tag)
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kobj_ns_drop(KOBJ_NS_TYPE_NET, kfc->ns_tag);
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kernfs_free_fs_context(fc);
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kfree(kfc);
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}
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static const struct fs_context_operations sysfs_fs_context_ops = {
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.free = sysfs_fs_context_free,
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.get_tree = sysfs_get_tree,
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};
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static int sysfs_init_fs_context(struct fs_context *fc)
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{
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struct kernfs_fs_context *kfc;
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struct net *netns;
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if (!(fc->sb_flags & SB_KERNMOUNT)) {
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if (!kobj_ns_current_may_mount(KOBJ_NS_TYPE_NET))
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return -EPERM;
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}
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kfc = kzalloc_obj(struct kernfs_fs_context);
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if (!kfc)
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return -ENOMEM;
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kfc->ns_tag = netns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
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kfc->root = sysfs_root;
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kfc->magic = SYSFS_MAGIC;
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fc->fs_private = kfc;
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fc->ops = &sysfs_fs_context_ops;
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if (netns) {
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put_user_ns(fc->user_ns);
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fc->user_ns = get_user_ns(netns->user_ns);
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}
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fc->global = true;
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return 0;
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}
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static void sysfs_kill_sb(struct super_block *sb)
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{
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void *ns = (void *)kernfs_super_ns(sb);
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kernfs_kill_sb(sb);
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kobj_ns_drop(KOBJ_NS_TYPE_NET, ns);
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}
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static struct file_system_type sysfs_fs_type = {
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.name = "sysfs",
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.init_fs_context = sysfs_init_fs_context,
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.kill_sb = sysfs_kill_sb,
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.fs_flags = FS_USERNS_MOUNT,
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};
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int __init sysfs_init(void)
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{
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int err;
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sysfs_root = kernfs_create_root(NULL, KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK,
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NULL);
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if (IS_ERR(sysfs_root))
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return PTR_ERR(sysfs_root);
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sysfs_root_kn = kernfs_root_to_node(sysfs_root);
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err = register_filesystem(&sysfs_fs_type);
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if (err) {
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kernfs_destroy_root(sysfs_root);
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return err;
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}
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return 0;
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}
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