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>
17 #include <linux/xattr.h>
19 #include <linux/kernfs.h>
21 struct sysfs_inode_attrs
{
22 struct iattr ia_iattr
;
26 struct simple_xattrs xattrs
;
29 #define SD_DEACTIVATED_BIAS INT_MIN
31 /* SYSFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
34 * kernfs_root - find out the kernfs_root a kernfs_node belongs to
35 * @kn: kernfs_node of interest
37 * Return the kernfs_root @kn belongs to.
39 static inline struct kernfs_root
*kernfs_root(struct kernfs_node
*kn
)
41 /* if parent exists, it's always a dir; otherwise, @sd is a dir */
48 * Context structure to be used while adding/removing nodes.
50 struct sysfs_addrm_cxt
{
51 struct kernfs_node
*removed
;
57 struct sysfs_super_info
{
59 * The root associated with this super_block. Each super_block is
60 * identified by the root and ns it's associated with.
62 struct kernfs_root
*root
;
65 * Each sb is associated with one namespace tag, currently the
66 * network namespace of the task which mounted this sysfs instance.
67 * If multiple tags become necessary, make the following an array
68 * and compare kernfs_node tag against every entry.
72 #define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info))
74 extern struct kmem_cache
*sysfs_dir_cachep
;
79 struct inode
*sysfs_get_inode(struct super_block
*sb
, struct kernfs_node
*kn
);
80 void sysfs_evict_inode(struct inode
*inode
);
81 int sysfs_permission(struct inode
*inode
, int mask
);
82 int sysfs_setattr(struct dentry
*dentry
, struct iattr
*iattr
);
83 int sysfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
85 int sysfs_setxattr(struct dentry
*dentry
, const char *name
, const void *value
,
86 size_t size
, int flags
);
87 int sysfs_removexattr(struct dentry
*dentry
, const char *name
);
88 ssize_t
sysfs_getxattr(struct dentry
*dentry
, const char *name
, void *buf
,
90 ssize_t
sysfs_listxattr(struct dentry
*dentry
, char *buf
, size_t size
);
91 void sysfs_inode_init(void);
96 extern struct mutex sysfs_mutex
;
97 extern const struct dentry_operations sysfs_dentry_ops
;
98 extern const struct file_operations sysfs_dir_operations
;
99 extern const struct inode_operations sysfs_dir_inode_operations
;
101 struct kernfs_node
*sysfs_get_active(struct kernfs_node
*kn
);
102 void sysfs_put_active(struct kernfs_node
*kn
);
103 void sysfs_addrm_start(struct sysfs_addrm_cxt
*acxt
);
104 int sysfs_add_one(struct sysfs_addrm_cxt
*acxt
, struct kernfs_node
*kn
,
105 struct kernfs_node
*parent
);
106 void sysfs_addrm_finish(struct sysfs_addrm_cxt
*acxt
);
107 struct kernfs_node
*sysfs_new_dirent(struct kernfs_root
*root
,
108 const char *name
, umode_t mode
, int type
);
113 extern const struct file_operations kernfs_file_operations
;
115 void sysfs_unmap_bin_file(struct kernfs_node
*kn
);
120 extern const struct inode_operations sysfs_symlink_inode_operations
;
122 #endif /* __KERNFS_INTERNAL_H */