| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |