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kernfs has historically used const void * to pass around namespace tags used for directory-level namespace filtering. The only current user of this is sysfs network namespace tagging where struct net pointers are cast to void *. Replace all const void * namespace parameters with const struct ns_common * throughout the kernfs, sysfs, and kobject namespace layers. This includes the kobj_ns_type_operations callbacks, kobject_namespace(), and all sysfs/kernfs APIs that accept or return namespace tags. Passing struct ns_common is needed because various codepaths require access to the underlying namespace. A struct ns_common can always be converted back to the concrete namespace type (e.g., struct net) via container_of() or to_ns_common() in the reverse direction. This is a preparatory change for switching to ns_id-based directory iteration to prevent a KASLR pointer leak through the current use of raw namespace pointers as hash seeds and comparison keys. Signed-off-by: Christian Brauner <brauner@kernel.org>
44 lines
1007 B
C
44 lines
1007 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* fs/sysfs/sysfs.h - sysfs internal header file
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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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#ifndef __SYSFS_INTERNAL_H
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#define __SYSFS_INTERNAL_H
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#include <linux/sysfs.h>
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/*
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* mount.c
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*/
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extern struct kernfs_node *sysfs_root_kn;
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/*
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* dir.c
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*/
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extern spinlock_t sysfs_symlink_target_lock;
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void sysfs_warn_dup(struct kernfs_node *parent, const char *name);
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/*
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* file.c
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*/
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int sysfs_add_file_mode_ns(struct kernfs_node *parent,
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const struct attribute *attr, umode_t amode, kuid_t uid,
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kgid_t gid, const struct ns_common *ns);
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int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
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const struct bin_attribute *battr, umode_t mode, size_t size,
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kuid_t uid, kgid_t gid, const struct ns_common *ns);
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/*
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* symlink.c
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*/
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int sysfs_create_link_sd(struct kernfs_node *kn, struct kobject *target,
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const char *name);
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#endif /* __SYSFS_INTERNAL_H */
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