2007-09-20 15:05:10 +08:00
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/* type-specific structures for sysfs_dirent->s_* union members */
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2007-06-14 02:45:15 +08:00
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struct sysfs_elem_dir {
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2007-09-20 15:05:10 +08:00
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struct kobject *kobj;
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2007-06-14 02:45:15 +08:00
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};
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struct sysfs_elem_symlink {
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2007-09-20 15:05:10 +08:00
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struct sysfs_dirent *target_sd;
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2007-06-14 02:45:15 +08:00
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};
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struct sysfs_elem_attr {
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2007-09-20 15:05:10 +08:00
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struct attribute *attr;
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2007-06-14 02:45:15 +08:00
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};
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struct sysfs_elem_bin_attr {
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2007-09-20 15:05:10 +08:00
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struct bin_attribute *bin_attr;
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2007-06-14 02:45:15 +08:00
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};
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2007-06-14 02:45:16 +08:00
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/*
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2007-09-20 15:05:10 +08:00
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* sysfs_dirent - the building block of sysfs hierarchy. Each and
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* every sysfs node is represented by single sysfs_dirent.
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*
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2007-06-14 02:45:16 +08:00
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* As long as s_count reference is held, the sysfs_dirent itself is
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* accessible. Dereferencing s_elem or any other outer entity
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* requires s_active reference.
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*/
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2007-02-16 21:35:25 +08:00
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struct sysfs_dirent {
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atomic_t s_count;
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2007-06-14 02:45:18 +08:00
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atomic_t s_active;
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2007-09-20 15:05:10 +08:00
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struct sysfs_dirent *s_parent;
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struct sysfs_dirent *s_sibling;
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struct sysfs_dirent *s_children;
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const char *s_name;
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2007-06-14 02:45:15 +08:00
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union {
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struct sysfs_elem_dir dir;
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struct sysfs_elem_symlink symlink;
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struct sysfs_elem_attr attr;
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struct sysfs_elem_bin_attr bin_attr;
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} s_elem;
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2007-06-14 03:27:21 +08:00
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unsigned int s_flags;
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2007-02-16 21:35:25 +08:00
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umode_t s_mode;
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2007-06-11 13:02:45 +08:00
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ino_t s_ino;
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2007-09-20 15:05:10 +08:00
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struct iattr *s_iattr;
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2007-02-16 21:35:25 +08:00
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atomic_t s_event;
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};
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2005-04-17 06:20:36 +08:00
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2007-09-20 15:05:10 +08:00
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#define SD_DEACTIVATED_BIAS INT_MIN
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2007-06-14 02:45:16 +08:00
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2007-09-20 15:05:10 +08:00
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#define SYSFS_TYPE_MASK 0x00ff
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#define SYSFS_ROOT 0x0001
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#define SYSFS_DIR 0x0002
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#define SYSFS_KOBJ_ATTR 0x0004
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#define SYSFS_KOBJ_BIN_ATTR 0x0008
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#define SYSFS_KOBJ_LINK 0x0020
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#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
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#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
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#define SYSFS_FLAG_REMOVED 0x0200
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static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
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{
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return sd->s_flags & SYSFS_TYPE_MASK;
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}
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/*
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* Context structure to be used while adding/removing nodes.
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*/
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2007-06-14 03:27:24 +08:00
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struct sysfs_addrm_cxt {
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struct sysfs_dirent *parent_sd;
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struct inode *parent_inode;
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struct sysfs_dirent *removed;
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int cnt;
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};
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2007-09-20 15:05:10 +08:00
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/*
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* mount.c
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*/
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2007-06-14 03:27:25 +08:00
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extern struct sysfs_dirent sysfs_root;
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2007-09-20 15:05:10 +08:00
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extern struct super_block *sysfs_sb;
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2006-12-07 12:33:20 +08:00
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extern struct kmem_cache *sysfs_dir_cachep;
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2005-04-17 06:20:36 +08:00
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2007-09-20 15:05:10 +08:00
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/*
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* dir.c
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*/
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2007-06-14 03:27:23 +08:00
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extern struct mutex sysfs_mutex;
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2007-08-20 20:36:30 +08:00
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extern struct mutex sysfs_rename_mutex;
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2007-09-20 15:05:10 +08:00
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extern spinlock_t sysfs_assoc_lock;
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|
2006-03-28 17:56:42 +08:00
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extern const struct file_operations sysfs_dir_operations;
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2007-02-12 16:55:40 +08:00
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extern const struct inode_operations sysfs_dir_inode_operations;
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2005-04-17 06:20:36 +08:00
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2007-09-20 15:05:10 +08:00
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struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
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struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
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void sysfs_put_active(struct sysfs_dirent *sd);
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struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
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void sysfs_put_active_two(struct sysfs_dirent *sd);
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void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
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struct sysfs_dirent *parent_sd);
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int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
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void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
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void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
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struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
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|
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|
const unsigned char *name);
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struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
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|
|
|
const unsigned char *name);
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struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type);
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|
void release_sysfs_dirent(struct sysfs_dirent *sd);
|
|
|
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|
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|
|
int sysfs_create_subdir(struct kobject *kobj, const char *name,
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|
|
|
struct sysfs_dirent **p_sd);
|
|
|
|
void sysfs_remove_subdir(struct sysfs_dirent *sd);
|
|
|
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|
|
|
|
static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-06-14 02:45:16 +08:00
|
|
|
if (sd) {
|
|
|
|
WARN_ON(!atomic_read(&sd->s_count));
|
|
|
|
atomic_inc(&sd->s_count);
|
|
|
|
}
|
|
|
|
return sd;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-09-20 15:05:10 +08:00
|
|
|
static inline void sysfs_put(struct sysfs_dirent *sd)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-06-14 02:45:16 +08:00
|
|
|
if (sd && atomic_dec_and_test(&sd->s_count))
|
|
|
|
release_sysfs_dirent(sd);
|
|
|
|
}
|
2007-09-20 15:05:10 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* inode.c
|
|
|
|
*/
|
|
|
|
struct inode *sysfs_get_inode(struct sysfs_dirent *sd);
|
|
|
|
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
|
|
|
|
int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* file.c
|
|
|
|
*/
|
|
|
|
extern const struct file_operations sysfs_file_operations;
|
|
|
|
|
|
|
|
int sysfs_add_file(struct sysfs_dirent *dir_sd,
|
|
|
|
const struct attribute *attr, int type);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* bin.c
|
|
|
|
*/
|
|
|
|
extern const struct file_operations bin_fops;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* symlink.c
|
|
|
|
*/
|
|
|
|
extern const struct inode_operations sysfs_symlink_inode_operations;
|