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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/sysfs/sysfs.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/sysfs/sysfs.h')
-rw-r--r--fs/sysfs/sysfs.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
new file mode 100644
index 000000000000..a8a24a0c0b3b
--- /dev/null
+++ b/fs/sysfs/sysfs.h
@@ -0,0 +1,95 @@
1
2extern struct vfsmount * sysfs_mount;
3extern kmem_cache_t *sysfs_dir_cachep;
4
5extern struct inode * sysfs_new_inode(mode_t mode);
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);
10extern struct dentry * sysfs_get_dentry(struct dentry *, const char *);
11
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);
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 kmem_cache_free(sysfs_dir_cachep, sd);
79}
80
81static 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
90static 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