Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | |
2 | extern struct vfsmount * sysfs_mount; | |
3 | extern kmem_cache_t *sysfs_dir_cachep; | |
4 | ||
5 | extern struct inode * sysfs_new_inode(mode_t mode); | |
6 | extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *)); | |
7 | ||
8 | extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *, | |
9 | umode_t, int); | |
10 | extern struct dentry * sysfs_get_dentry(struct dentry *, const char *); | |
11 | ||
12 | extern int sysfs_add_file(struct dentry *, const struct attribute *, int); | |
13 | extern void sysfs_hash_and_remove(struct dentry * dir, const char * name); | |
14 | ||
15 | extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); | |
16 | extern void sysfs_remove_subdir(struct dentry *); | |
17 | ||
18 | extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd); | |
19 | extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent); | |
20 | ||
21 | extern struct rw_semaphore sysfs_rename_sem; | |
22 | extern struct super_block * sysfs_sb; | |
23 | extern struct file_operations sysfs_dir_operations; | |
24 | extern struct file_operations sysfs_file_operations; | |
25 | extern struct file_operations bin_fops; | |
26 | extern struct inode_operations sysfs_dir_inode_operations; | |
27 | extern struct inode_operations sysfs_symlink_inode_operations; | |
28 | ||
29 | struct sysfs_symlink { | |
30 | char * link_name; | |
31 | struct kobject * target_kobj; | |
32 | }; | |
33 | ||
34 | static inline struct kobject * to_kobj(struct dentry * dentry) | |
35 | { | |
36 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
37 | return ((struct kobject *) sd->s_element); | |
38 | } | |
39 | ||
40 | static inline struct attribute * to_attr(struct dentry * dentry) | |
41 | { | |
42 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
43 | return ((struct attribute *) sd->s_element); | |
44 | } | |
45 | ||
46 | static inline struct bin_attribute * to_bin_attr(struct dentry * dentry) | |
47 | { | |
48 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
49 | return ((struct bin_attribute *) sd->s_element); | |
50 | } | |
51 | ||
52 | static inline struct kobject *sysfs_get_kobject(struct dentry *dentry) | |
53 | { | |
54 | struct kobject * kobj = NULL; | |
55 | ||
56 | spin_lock(&dcache_lock); | |
57 | if (!d_unhashed(dentry)) { | |
58 | struct sysfs_dirent * sd = dentry->d_fsdata; | |
59 | if (sd->s_type & SYSFS_KOBJ_LINK) { | |
60 | struct sysfs_symlink * sl = sd->s_element; | |
61 | kobj = kobject_get(sl->target_kobj); | |
62 | } else | |
63 | kobj = kobject_get(sd->s_element); | |
64 | } | |
65 | spin_unlock(&dcache_lock); | |
66 | ||
67 | return kobj; | |
68 | } | |
69 | ||
70 | static inline void release_sysfs_dirent(struct sysfs_dirent * sd) | |
71 | { | |
72 | if (sd->s_type & SYSFS_KOBJ_LINK) { | |
73 | struct sysfs_symlink * sl = sd->s_element; | |
74 | kfree(sl->link_name); | |
75 | kobject_put(sl->target_kobj); | |
76 | kfree(sl); | |
77 | } | |
78 | kmem_cache_free(sysfs_dir_cachep, sd); | |
79 | } | |
80 | ||
81 | static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) | |
82 | { | |
83 | if (sd) { | |
84 | WARN_ON(!atomic_read(&sd->s_count)); | |
85 | atomic_inc(&sd->s_count); | |
86 | } | |
87 | return sd; | |
88 | } | |
89 | ||
90 | static inline void sysfs_put(struct sysfs_dirent * sd) | |
91 | { | |
92 | if (atomic_dec_and_test(&sd->s_count)) | |
93 | release_sysfs_dirent(sd); | |
94 | } | |
95 |