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Commit | Line | Data |
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d56c3eae AR |
1 | struct sysfs_dirent { |
2 | atomic_t s_count; | |
3 | struct list_head s_sibling; | |
4 | struct list_head s_children; | |
5 | void * s_element; | |
6 | int s_type; | |
7 | umode_t s_mode; | |
dc351252 | 8 | ino_t s_ino; |
d56c3eae AR |
9 | struct dentry * s_dentry; |
10 | struct iattr * s_iattr; | |
11 | atomic_t s_event; | |
12 | }; | |
1da177e4 LT |
13 | |
14 | extern struct vfsmount * sysfs_mount; | |
e18b890b | 15 | extern struct kmem_cache *sysfs_dir_cachep; |
1da177e4 | 16 | |
b592fcfe | 17 | extern void sysfs_delete_inode(struct inode *inode); |
8215534c | 18 | extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *); |
1da177e4 LT |
19 | extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *)); |
20 | ||
c516865c | 21 | extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *); |
1da177e4 LT |
22 | extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *, |
23 | umode_t, int); | |
1da177e4 LT |
24 | |
25 | extern int sysfs_add_file(struct dentry *, const struct attribute *, int); | |
995982ca | 26 | extern int sysfs_hash_and_remove(struct dentry * dir, const char * name); |
4508a7a7 | 27 | extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name); |
1da177e4 LT |
28 | |
29 | extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); | |
30 | extern void sysfs_remove_subdir(struct dentry *); | |
31 | ||
32 | extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd); | |
33 | extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent); | |
988d186d | 34 | extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); |
1da177e4 LT |
35 | |
36 | extern struct rw_semaphore sysfs_rename_sem; | |
37 | extern struct super_block * sysfs_sb; | |
4b6f5d20 AV |
38 | extern const struct file_operations sysfs_dir_operations; |
39 | extern const struct file_operations sysfs_file_operations; | |
40 | extern const struct file_operations bin_fops; | |
c5ef1c42 AV |
41 | extern const struct inode_operations sysfs_dir_inode_operations; |
42 | extern const struct inode_operations sysfs_symlink_inode_operations; | |
1da177e4 LT |
43 | |
44 | struct sysfs_symlink { | |
45 | char * link_name; | |
46 | struct kobject * target_kobj; | |
47 | }; | |
48 | ||
94bebf4d ON |
49 | struct sysfs_buffer { |
50 | struct list_head associates; | |
51 | size_t count; | |
52 | loff_t pos; | |
53 | char * page; | |
54 | struct sysfs_ops * ops; | |
55 | struct semaphore sem; | |
56 | int orphaned; | |
57 | int needs_read_fill; | |
58 | int event; | |
59 | }; | |
60 | ||
61 | struct sysfs_buffer_collection { | |
62 | struct list_head associates; | |
63 | }; | |
64 | ||
1da177e4 LT |
65 | static inline struct kobject * to_kobj(struct dentry * dentry) |
66 | { | |
67 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
68 | return ((struct kobject *) sd->s_element); | |
69 | } | |
70 | ||
71 | static inline struct attribute * to_attr(struct dentry * dentry) | |
72 | { | |
73 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
74 | return ((struct attribute *) sd->s_element); | |
75 | } | |
76 | ||
77 | static inline struct bin_attribute * to_bin_attr(struct dentry * dentry) | |
78 | { | |
79 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
80 | return ((struct bin_attribute *) sd->s_element); | |
81 | } | |
82 | ||
83 | static inline struct kobject *sysfs_get_kobject(struct dentry *dentry) | |
84 | { | |
85 | struct kobject * kobj = NULL; | |
86 | ||
87 | spin_lock(&dcache_lock); | |
88 | if (!d_unhashed(dentry)) { | |
89 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
90 | if (sd->s_type & SYSFS_KOBJ_LINK) { | |
91 | struct sysfs_symlink * sl = sd->s_element; | |
92 | kobj = kobject_get(sl->target_kobj); | |
93 | } else | |
94 | kobj = kobject_get(sd->s_element); | |
95 | } | |
96 | spin_unlock(&dcache_lock); | |
97 | ||
98 | return kobj; | |
99 | } | |
100 | ||
101 | static inline void release_sysfs_dirent(struct sysfs_dirent * sd) | |
102 | { | |
103 | if (sd->s_type & SYSFS_KOBJ_LINK) { | |
104 | struct sysfs_symlink * sl = sd->s_element; | |
105 | kfree(sl->link_name); | |
106 | kobject_put(sl->target_kobj); | |
107 | kfree(sl); | |
108 | } | |
988d186d | 109 | kfree(sd->s_iattr); |
1da177e4 LT |
110 | kmem_cache_free(sysfs_dir_cachep, sd); |
111 | } | |
112 | ||
113 | static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) | |
114 | { | |
115 | if (sd) { | |
116 | WARN_ON(!atomic_read(&sd->s_count)); | |
117 | atomic_inc(&sd->s_count); | |
118 | } | |
119 | return sd; | |
120 | } | |
121 | ||
122 | static inline void sysfs_put(struct sysfs_dirent * sd) | |
123 | { | |
124 | if (atomic_dec_and_test(&sd->s_count)) | |
125 | release_sysfs_dirent(sd); | |
126 | } | |
127 | ||
b592fcfe EB |
128 | static inline int sysfs_is_shadowed_inode(struct inode *inode) |
129 | { | |
130 | return S_ISDIR(inode->i_mode) && inode->i_op->follow_link; | |
131 | } |