tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1
2extern struct vfsmount * sysfs_mount;
3extern kmem_cache_t *sysfs_dir_cachep;
4
5extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
6extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
7
8extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
9extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
10 umode_t, int);
11
12extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
13extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
14extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
15
16extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
17extern void sysfs_remove_subdir(struct dentry *);
18
19extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
20extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
21extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
22
23extern struct rw_semaphore sysfs_rename_sem;
24extern struct super_block * sysfs_sb;
25extern const struct file_operations sysfs_dir_operations;
26extern const struct file_operations sysfs_file_operations;
27extern const struct file_operations bin_fops;
28extern struct inode_operations sysfs_dir_inode_operations;
29extern struct inode_operations sysfs_symlink_inode_operations;
30
31struct sysfs_symlink {
32 char * link_name;
33 struct kobject * target_kobj;
34};
35
36static inline struct kobject * to_kobj(struct dentry * dentry)
37{
38 struct sysfs_dirent * sd = dentry->d_fsdata;
39 return ((struct kobject *) sd->s_element);
40}
41
42static inline struct attribute * to_attr(struct dentry * dentry)
43{
44 struct sysfs_dirent * sd = dentry->d_fsdata;
45 return ((struct attribute *) sd->s_element);
46}
47
48static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
49{
50 struct sysfs_dirent * sd = dentry->d_fsdata;
51 return ((struct bin_attribute *) sd->s_element);
52}
53
54static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
55{
56 struct kobject * kobj = NULL;
57
58 spin_lock(&dcache_lock);
59 if (!d_unhashed(dentry)) {
60 struct sysfs_dirent * sd = dentry->d_fsdata;
61 if (sd->s_type & SYSFS_KOBJ_LINK) {
62 struct sysfs_symlink * sl = sd->s_element;
63 kobj = kobject_get(sl->target_kobj);
64 } else
65 kobj = kobject_get(sd->s_element);
66 }
67 spin_unlock(&dcache_lock);
68
69 return kobj;
70}
71
72static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
73{
74 if (sd->s_type & SYSFS_KOBJ_LINK) {
75 struct sysfs_symlink * sl = sd->s_element;
76 kfree(sl->link_name);
77 kobject_put(sl->target_kobj);
78 kfree(sl);
79 }
80 kfree(sd->s_iattr);
81 kmem_cache_free(sysfs_dir_cachep, sd);
82}
83
84static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
85{
86 if (sd) {
87 WARN_ON(!atomic_read(&sd->s_count));
88 atomic_inc(&sd->s_count);
89 }
90 return sd;
91}
92
93static inline void sysfs_put(struct sysfs_dirent * sd)
94{
95 if (atomic_dec_and_test(&sd->s_count))
96 release_sysfs_dirent(sd);
97}
98