2 * fs/kernfs/kernfs-internal.h - kernfs internal header file
4 * Copyright (c) 2001-3 Patrick Mochel
5 * Copyright (c) 2007 SUSE Linux Products GmbH
6 * Copyright (c) 2007, 2013 Tejun Heo <teheo@suse.de>
8 * This file is released under the GPLv2.
11 #ifndef __KERNFS_INTERNAL_H
12 #define __KERNFS_INTERNAL_H
14 #include <linux/lockdep.h>
16 #include <linux/mutex.h>
18 #include <linux/kernfs.h>
20 struct sysfs_inode_attrs {
21 struct iattr ia_iattr;
26 #define SD_DEACTIVATED_BIAS INT_MIN
28 /* SYSFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
31 * kernfs_root - find out the kernfs_root a sysfs_dirent belongs to
32 * @sd: sysfs_dirent of interest
34 * Return the kernfs_root @sd belongs to.
36 static inline struct kernfs_root *kernfs_root(struct sysfs_dirent *sd)
38 /* if parent exists, it's always a dir; otherwise, @sd is a dir */
41 return sd->s_dir.root;
45 * Context structure to be used while adding/removing nodes.
47 struct sysfs_addrm_cxt {
48 struct sysfs_dirent *removed;
54 struct sysfs_super_info {
56 * The root associated with this super_block. Each super_block is
57 * identified by the root and ns it's associated with.
59 struct kernfs_root *root;
62 * Each sb is associated with one namespace tag, currently the network
63 * namespace of the task which mounted this sysfs instance. If multiple
64 * tags become necessary, make the following an array and compare
65 * sysfs_dirent tag against every entry.
69 #define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info))
71 extern struct kmem_cache *sysfs_dir_cachep;
76 struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
77 void sysfs_evict_inode(struct inode *inode);
78 int sysfs_permission(struct inode *inode, int mask);
79 int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
80 int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
82 int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
83 size_t size, int flags);
84 void sysfs_inode_init(void);
89 extern struct mutex sysfs_mutex;
90 extern const struct dentry_operations sysfs_dentry_ops;
91 extern const struct file_operations sysfs_dir_operations;
92 extern const struct inode_operations sysfs_dir_inode_operations;
94 struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
95 void sysfs_put_active(struct sysfs_dirent *sd);
96 void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt);
97 int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
98 struct sysfs_dirent *parent_sd);
99 void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
100 struct sysfs_dirent *sysfs_new_dirent(struct kernfs_root *root,
101 const char *name, umode_t mode, int type);
106 extern const struct file_operations kernfs_file_operations;
108 void sysfs_unmap_bin_file(struct sysfs_dirent *sd);
113 extern const struct inode_operations sysfs_symlink_inode_operations;
115 #endif /* __KERNFS_INTERNAL_H */