Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
9 umode_t, int);
10
11extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
12extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
13
14extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
15extern void sysfs_remove_subdir(struct dentry *);
16
17extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
18extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
19extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
20
21extern struct rw_semaphore sysfs_rename_sem;
22extern struct super_block * sysfs_sb;
23extern struct file_operations sysfs_dir_operations;
24extern struct file_operations sysfs_file_operations;
25extern struct file_operations bin_fops;
26extern struct inode_operations sysfs_dir_inode_operations;
27extern struct inode_operations sysfs_symlink_inode_operations;
28
29struct sysfs_symlink {
30 char * link_name;
31 struct kobject * target_kobj;
32};
33
34static 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
40static 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
46static 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
52static 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
70static 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 kfree(sd->s_iattr);
79 kmem_cache_free(sysfs_dir_cachep, sd);
80}
81
82static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
83{
84 if (sd) {
85 WARN_ON(!atomic_read(&sd->s_count));
86 atomic_inc(&sd->s_count);
87 }
88 return sd;
89}
90
91static inline void sysfs_put(struct sysfs_dirent * sd)
92{
93 if (atomic_dec_and_test(&sd->s_count))
94 release_sysfs_dirent(sd);
95}
96