2007-06-13 12:45:15 -06:00
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struct sysfs_elem_dir {
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struct kobject * kobj;
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};
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struct sysfs_elem_symlink {
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2007-06-13 12:45:15 -06:00
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struct sysfs_dirent * target_sd;
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2007-06-13 12:45:15 -06:00
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};
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|
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struct sysfs_elem_attr {
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struct attribute * attr;
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};
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struct sysfs_elem_bin_attr {
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struct bin_attribute * bin_attr;
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|
};
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|
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2007-06-13 12:45:16 -06:00
|
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/*
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|
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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 06:35:25 -07:00
|
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struct sysfs_dirent {
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|
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atomic_t s_count;
|
2007-06-13 12:45:18 -06:00
|
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|
atomic_t s_active;
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2007-06-13 12:45:14 -06:00
|
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struct sysfs_dirent * s_parent;
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2007-06-13 12:45:18 -06:00
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struct sysfs_dirent * s_sibling;
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struct sysfs_dirent * s_children;
|
2007-06-13 12:45:15 -06:00
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const char * s_name;
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2007-06-13 12:45:15 -06:00
|
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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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|
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|
2007-06-13 13:27:21 -06:00
|
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|
unsigned int s_flags;
|
2007-02-16 06:35:25 -07:00
|
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|
umode_t s_mode;
|
2007-06-10 23:02:45 -06:00
|
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|
ino_t s_ino;
|
2007-02-16 06:35:25 -07:00
|
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|
struct dentry * s_dentry;
|
|
|
|
struct iattr * s_iattr;
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|
|
|
atomic_t s_event;
|
|
|
|
};
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 12:45:18 -06:00
|
|
|
#define SD_DEACTIVATED_BIAS INT_MIN
|
2007-06-13 12:45:16 -06:00
|
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|
|
2007-06-13 13:27:24 -06:00
|
|
|
struct sysfs_addrm_cxt {
|
|
|
|
struct sysfs_dirent *parent_sd;
|
|
|
|
struct inode *parent_inode;
|
|
|
|
struct sysfs_dirent *removed;
|
|
|
|
int cnt;
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
extern struct vfsmount * sysfs_mount;
|
2006-12-06 21:33:20 -07:00
|
|
|
extern struct kmem_cache *sysfs_dir_cachep;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 13:27:24 -06:00
|
|
|
extern void sysfs_link_sibling(struct sysfs_dirent *sd);
|
|
|
|
extern void sysfs_unlink_sibling(struct sysfs_dirent *sd);
|
2007-06-13 12:45:18 -06:00
|
|
|
extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
|
|
|
|
extern void sysfs_put_active(struct sysfs_dirent *sd);
|
|
|
|
extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
|
|
|
|
extern void sysfs_put_active_two(struct sysfs_dirent *sd);
|
2007-06-13 13:27:24 -06:00
|
|
|
extern void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
|
|
|
|
struct sysfs_dirent *parent_sd);
|
|
|
|
extern void sysfs_add_one(struct sysfs_addrm_cxt *acxt,
|
|
|
|
struct sysfs_dirent *sd);
|
|
|
|
extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt,
|
|
|
|
struct sysfs_dirent *sd);
|
|
|
|
extern int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
|
2007-06-13 12:45:18 -06:00
|
|
|
|
2007-01-24 12:35:52 -07:00
|
|
|
extern void sysfs_delete_inode(struct inode *inode);
|
2007-06-13 12:45:17 -06:00
|
|
|
extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
|
2007-06-13 12:45:17 -06:00
|
|
|
extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
|
2007-06-13 12:45:17 -06:00
|
|
|
extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 12:45:13 -06:00
|
|
|
extern void release_sysfs_dirent(struct sysfs_dirent * sd);
|
2007-06-13 13:27:22 -06:00
|
|
|
extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
|
|
|
|
const unsigned char *name);
|
|
|
|
extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
|
|
|
|
const unsigned char *name);
|
2007-06-13 12:45:15 -06:00
|
|
|
extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
|
|
|
|
int type);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 13:27:22 -06:00
|
|
|
extern int sysfs_add_file(struct sysfs_dirent *dir_sd,
|
|
|
|
const struct attribute *attr, int type);
|
|
|
|
extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
|
2006-03-19 23:53:53 -07:00
|
|
|
extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 13:27:22 -06:00
|
|
|
extern int sysfs_create_subdir(struct kobject *kobj, const char *name,
|
|
|
|
struct sysfs_dirent **p_sd);
|
|
|
|
extern void sysfs_remove_subdir(struct sysfs_dirent *sd);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-05-30 23:09:14 -06:00
|
|
|
extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 13:27:23 -06:00
|
|
|
extern spinlock_t sysfs_assoc_lock;
|
2007-06-13 13:27:23 -06:00
|
|
|
extern struct mutex sysfs_mutex;
|
2005-04-16 16:20:36 -06:00
|
|
|
extern struct super_block * sysfs_sb;
|
2006-03-28 02:56:42 -07:00
|
|
|
extern const struct file_operations sysfs_dir_operations;
|
|
|
|
extern const struct file_operations sysfs_file_operations;
|
|
|
|
extern const struct file_operations bin_fops;
|
2007-02-12 01:55:40 -07:00
|
|
|
extern const struct inode_operations sysfs_dir_inode_operations;
|
|
|
|
extern const struct inode_operations sysfs_symlink_inode_operations;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-13 13:27:21 -06:00
|
|
|
static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
|
|
|
|
{
|
|
|
|
return sd->s_flags & SYSFS_TYPE_MASK;
|
|
|
|
}
|
|
|
|
|
2007-06-13 12:45:16 -06:00
|
|
|
static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-06-13 12:45:16 -06:00
|
|
|
if (sd) {
|
|
|
|
WARN_ON(!atomic_read(&sd->s_count));
|
|
|
|
atomic_inc(&sd->s_count);
|
|
|
|
}
|
|
|
|
return sd;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2007-06-13 12:45:16 -06:00
|
|
|
static inline void sysfs_put(struct sysfs_dirent * sd)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-06-13 12:45:16 -06:00
|
|
|
if (sd && atomic_dec_and_test(&sd->s_count))
|
|
|
|
release_sysfs_dirent(sd);
|
|
|
|
}
|
2007-06-13 12:45:15 -06:00
|
|
|
|
2007-01-24 12:35:52 -07:00
|
|
|
static inline int sysfs_is_shadowed_inode(struct inode *inode)
|
|
|
|
{
|
|
|
|
return S_ISDIR(inode->i_mode) && inode->i_op->follow_link;
|
|
|
|
}
|