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