blob: 32958a7c50e95ce5ffe448a83507c654901fb349 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2extern struct vfsmount * sysfs_mount;
3extern kmem_cache_t *sysfs_dir_cachep;
4
Maneesh Soni82155342005-05-31 10:39:52 +05305extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
7
Maneesh Sonic5168652006-03-09 19:40:14 +05308extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07009extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
10 umode_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
13extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
14
15extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
16extern void sysfs_remove_subdir(struct dentry *);
17
18extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
19extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
Maneesh Soni988d1862005-05-31 10:39:14 +053020extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22extern struct rw_semaphore sysfs_rename_sem;
23extern struct super_block * sysfs_sb;
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080024extern const struct file_operations sysfs_dir_operations;
25extern const struct file_operations sysfs_file_operations;
26extern const struct file_operations bin_fops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027extern struct inode_operations sysfs_dir_inode_operations;
28extern struct inode_operations sysfs_symlink_inode_operations;
29
30struct sysfs_symlink {
31 char * link_name;
32 struct kobject * target_kobj;
33};
34
35static inline struct kobject * to_kobj(struct dentry * dentry)
36{
37 struct sysfs_dirent * sd = dentry->d_fsdata;
38 return ((struct kobject *) sd->s_element);
39}
40
41static inline struct attribute * to_attr(struct dentry * dentry)
42{
43 struct sysfs_dirent * sd = dentry->d_fsdata;
44 return ((struct attribute *) sd->s_element);
45}
46
47static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
48{
49 struct sysfs_dirent * sd = dentry->d_fsdata;
50 return ((struct bin_attribute *) sd->s_element);
51}
52
53static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
54{
55 struct kobject * kobj = NULL;
56
57 spin_lock(&dcache_lock);
58 if (!d_unhashed(dentry)) {
59 struct sysfs_dirent * sd = dentry->d_fsdata;
60 if (sd->s_type & SYSFS_KOBJ_LINK) {
61 struct sysfs_symlink * sl = sd->s_element;
62 kobj = kobject_get(sl->target_kobj);
63 } else
64 kobj = kobject_get(sd->s_element);
65 }
66 spin_unlock(&dcache_lock);
67
68 return kobj;
69}
70
71static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
72{
73 if (sd->s_type & SYSFS_KOBJ_LINK) {
74 struct sysfs_symlink * sl = sd->s_element;
75 kfree(sl->link_name);
76 kobject_put(sl->target_kobj);
77 kfree(sl);
78 }
Maneesh Soni988d1862005-05-31 10:39:14 +053079 kfree(sd->s_iattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 kmem_cache_free(sysfs_dir_cachep, sd);
81}
82
83static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
84{
85 if (sd) {
86 WARN_ON(!atomic_read(&sd->s_count));
87 atomic_inc(&sd->s_count);
88 }
89 return sd;
90}
91
92static inline void sysfs_put(struct sysfs_dirent * sd)
93{
94 if (atomic_dec_and_test(&sd->s_count))
95 release_sysfs_dirent(sd);
96}
97