Commit | Line | Data |
---|---|---|
d56c3eae AR |
1 | struct sysfs_dirent { |
2 | atomic_t s_count; | |
13b3086d | 3 | struct sysfs_dirent * s_parent; |
d56c3eae AR |
4 | struct list_head s_sibling; |
5 | struct list_head s_children; | |
0c096b50 | 6 | const char * s_name; |
d56c3eae AR |
7 | void * s_element; |
8 | int s_type; | |
9 | umode_t s_mode; | |
dc351252 | 10 | ino_t s_ino; |
d56c3eae AR |
11 | struct dentry * s_dentry; |
12 | struct iattr * s_iattr; | |
13 | atomic_t s_event; | |
14 | }; | |
1da177e4 LT |
15 | |
16 | extern struct vfsmount * sysfs_mount; | |
e18b890b | 17 | extern struct kmem_cache *sysfs_dir_cachep; |
1da177e4 | 18 | |
b592fcfe | 19 | extern void sysfs_delete_inode(struct inode *inode); |
8215534c | 20 | extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *); |
1da177e4 LT |
21 | extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *)); |
22 | ||
fa7f912a | 23 | extern void release_sysfs_dirent(struct sysfs_dirent * sd); |
c516865c | 24 | extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *); |
0c096b50 TH |
25 | extern struct sysfs_dirent *sysfs_new_dirent(const char *name, void *element, |
26 | umode_t mode, int type); | |
a26cd722 TH |
27 | extern void sysfs_attach_dirent(struct sysfs_dirent *sd, |
28 | struct sysfs_dirent *parent_sd, | |
29 | struct dentry *dentry); | |
1da177e4 LT |
30 | |
31 | extern int sysfs_add_file(struct dentry *, const struct attribute *, int); | |
995982ca | 32 | extern int sysfs_hash_and_remove(struct dentry * dir, const char * name); |
4508a7a7 | 33 | extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name); |
1da177e4 LT |
34 | |
35 | extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); | |
36 | extern void sysfs_remove_subdir(struct dentry *); | |
37 | ||
1da177e4 | 38 | extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent); |
988d186d | 39 | extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); |
1da177e4 | 40 | |
dd14cbc9 | 41 | extern spinlock_t sysfs_lock; |
1da177e4 LT |
42 | extern struct rw_semaphore sysfs_rename_sem; |
43 | extern struct super_block * sysfs_sb; | |
4b6f5d20 AV |
44 | extern const struct file_operations sysfs_dir_operations; |
45 | extern const struct file_operations sysfs_file_operations; | |
46 | extern const struct file_operations bin_fops; | |
c5ef1c42 AV |
47 | extern const struct inode_operations sysfs_dir_inode_operations; |
48 | extern const struct inode_operations sysfs_symlink_inode_operations; | |
1da177e4 LT |
49 | |
50 | struct sysfs_symlink { | |
1da177e4 LT |
51 | struct kobject * target_kobj; |
52 | }; | |
53 | ||
94bebf4d ON |
54 | struct sysfs_buffer { |
55 | struct list_head associates; | |
56 | size_t count; | |
57 | loff_t pos; | |
58 | char * page; | |
59 | struct sysfs_ops * ops; | |
60 | struct semaphore sem; | |
61 | int orphaned; | |
62 | int needs_read_fill; | |
63 | int event; | |
64 | }; | |
65 | ||
66 | struct sysfs_buffer_collection { | |
67 | struct list_head associates; | |
68 | }; | |
69 | ||
1da177e4 LT |
70 | static inline struct kobject * to_kobj(struct dentry * dentry) |
71 | { | |
72 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
73 | return ((struct kobject *) sd->s_element); | |
74 | } | |
75 | ||
76 | static inline struct attribute * to_attr(struct dentry * dentry) | |
77 | { | |
78 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
79 | return ((struct attribute *) sd->s_element); | |
80 | } | |
81 | ||
82 | static inline struct bin_attribute * to_bin_attr(struct dentry * dentry) | |
83 | { | |
84 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
85 | return ((struct bin_attribute *) sd->s_element); | |
86 | } | |
87 | ||
88 | static inline struct kobject *sysfs_get_kobject(struct dentry *dentry) | |
89 | { | |
90 | struct kobject * kobj = NULL; | |
91 | ||
92 | spin_lock(&dcache_lock); | |
93 | if (!d_unhashed(dentry)) { | |
94 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
95 | if (sd->s_type & SYSFS_KOBJ_LINK) { | |
96 | struct sysfs_symlink * sl = sd->s_element; | |
97 | kobj = kobject_get(sl->target_kobj); | |
98 | } else | |
99 | kobj = kobject_get(sd->s_element); | |
100 | } | |
101 | spin_unlock(&dcache_lock); | |
102 | ||
103 | return kobj; | |
104 | } | |
105 | ||
1da177e4 LT |
106 | static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) |
107 | { | |
108 | if (sd) { | |
109 | WARN_ON(!atomic_read(&sd->s_count)); | |
110 | atomic_inc(&sd->s_count); | |
111 | } | |
112 | return sd; | |
113 | } | |
114 | ||
115 | static inline void sysfs_put(struct sysfs_dirent * sd) | |
116 | { | |
7a23ad44 | 117 | if (sd && atomic_dec_and_test(&sd->s_count)) |
1da177e4 LT |
118 | release_sysfs_dirent(sd); |
119 | } | |
120 | ||
b592fcfe EB |
121 | static inline int sysfs_is_shadowed_inode(struct inode *inode) |
122 | { | |
123 | return S_ISDIR(inode->i_mode) && inode->i_op->follow_link; | |
124 | } |