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 kernfs_iattrs
{
22 struct iattr ia_iattr
;
26 struct simple_xattrs xattrs
;
29 /* +1 to avoid triggering overflow warning when negating it */
30 #define KN_DEACTIVATED_BIAS (INT_MIN + 1)
32 /* KERNFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
35 * kernfs_root - find out the kernfs_root a kernfs_node belongs to
36 * @kn: kernfs_node of interest
38 * Return the kernfs_root @kn belongs to.
40 static inline struct kernfs_root
*kernfs_root(struct kernfs_node
*kn
)
42 /* if parent exists, it's always a dir; otherwise, @sd is a dir */
51 struct kernfs_super_info
{
53 * The root associated with this super_block. Each super_block is
54 * identified by the root and ns it's associated with.
56 struct kernfs_root
*root
;
59 * Each sb is associated with one namespace tag, currently the
60 * network namespace of the task which mounted this kernfs
61 * instance. If multiple tags become necessary, make the following
62 * an array and compare kernfs_node tag against every entry.
66 #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
68 extern const struct super_operations kernfs_sops
;
69 extern struct kmem_cache
*kernfs_node_cache
;
74 struct inode
*kernfs_get_inode(struct super_block
*sb
, struct kernfs_node
*kn
);
75 void kernfs_evict_inode(struct inode
*inode
);
76 int kernfs_iop_permission(struct inode
*inode
, int mask
);
77 int kernfs_iop_setattr(struct dentry
*dentry
, struct iattr
*iattr
);
78 int kernfs_iop_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
80 int kernfs_iop_setxattr(struct dentry
*dentry
, const char *name
, const void *value
,
81 size_t size
, int flags
);
82 int kernfs_iop_removexattr(struct dentry
*dentry
, const char *name
);
83 ssize_t
kernfs_iop_getxattr(struct dentry
*dentry
, const char *name
, void *buf
,
85 ssize_t
kernfs_iop_listxattr(struct dentry
*dentry
, char *buf
, size_t size
);
86 void kernfs_inode_init(void);
91 extern struct mutex kernfs_mutex
;
92 extern const struct dentry_operations kernfs_dops
;
93 extern const struct file_operations kernfs_dir_fops
;
94 extern const struct inode_operations kernfs_dir_iops
;
96 struct kernfs_node
*kernfs_get_active(struct kernfs_node
*kn
);
97 void kernfs_put_active(struct kernfs_node
*kn
);
98 int kernfs_add_one(struct kernfs_node
*kn
);
99 struct kernfs_node
*kernfs_new_node(struct kernfs_node
*parent
,
100 const char *name
, umode_t mode
,
106 extern const struct file_operations kernfs_file_fops
;
108 void kernfs_unmap_bin_file(struct kernfs_node
*kn
);
113 extern const struct inode_operations kernfs_symlink_iops
;
115 #endif /* __KERNFS_INTERNAL_H */