b6b4a4399c
These functions are about to receive more complexity and doesn't really need to be inlined in the first place. Move them from fs/sysfs/sysfs.h to fs/sysfs/dir.c. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
struct sysfs_elem_dir {
|
|
struct kobject * kobj;
|
|
};
|
|
|
|
struct sysfs_elem_symlink {
|
|
struct sysfs_dirent * target_sd;
|
|
};
|
|
|
|
struct sysfs_elem_attr {
|
|
struct attribute * attr;
|
|
};
|
|
|
|
struct sysfs_elem_bin_attr {
|
|
struct bin_attribute * bin_attr;
|
|
};
|
|
|
|
/*
|
|
* As long as s_count reference is held, the sysfs_dirent itself is
|
|
* accessible. Dereferencing s_elem or any other outer entity
|
|
* requires s_active reference.
|
|
*/
|
|
struct sysfs_dirent {
|
|
atomic_t s_count;
|
|
struct rw_semaphore s_active;
|
|
struct sysfs_dirent * s_parent;
|
|
struct list_head s_sibling;
|
|
struct list_head s_children;
|
|
const char * s_name;
|
|
|
|
union {
|
|
struct sysfs_elem_dir dir;
|
|
struct sysfs_elem_symlink symlink;
|
|
struct sysfs_elem_attr attr;
|
|
struct sysfs_elem_bin_attr bin_attr;
|
|
} s_elem;
|
|
|
|
int s_type;
|
|
umode_t s_mode;
|
|
ino_t s_ino;
|
|
struct dentry * s_dentry;
|
|
struct iattr * s_iattr;
|
|
atomic_t s_event;
|
|
};
|
|
|
|
/*
|
|
* A sysfs file which deletes another file when written to need to
|
|
* write lock the s_active of the victim while its s_active is read
|
|
* locked for the write operation. Tell lockdep that this is okay.
|
|
*/
|
|
enum sysfs_s_active_class
|
|
{
|
|
SYSFS_S_ACTIVE_NORMAL, /* file r/w access, etc - default */
|
|
SYSFS_S_ACTIVE_DEACTIVATE, /* file deactivation */
|
|
};
|
|
|
|
extern struct vfsmount * sysfs_mount;
|
|
extern struct kmem_cache *sysfs_dir_cachep;
|
|
|
|
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);
|
|
extern void sysfs_deactivate(struct sysfs_dirent *sd);
|
|
|
|
extern void sysfs_delete_inode(struct inode *inode);
|
|
extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
|
|
extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
|
|
extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
|
|
|
|
extern void release_sysfs_dirent(struct sysfs_dirent * sd);
|
|
extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
|
|
extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
|
|
int type);
|
|
extern void sysfs_attach_dirent(struct sysfs_dirent *sd,
|
|
struct sysfs_dirent *parent_sd,
|
|
struct dentry *dentry);
|
|
|
|
extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
|
|
extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
|
|
extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
|
|
|
|
extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
|
|
extern void sysfs_remove_subdir(struct dentry *);
|
|
|
|
extern void sysfs_drop_dentry(struct sysfs_dirent *sd);
|
|
extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
|
|
|
|
extern spinlock_t sysfs_lock;
|
|
extern spinlock_t kobj_sysfs_assoc_lock;
|
|
extern struct rw_semaphore sysfs_rename_sem;
|
|
extern struct super_block * sysfs_sb;
|
|
extern const struct file_operations sysfs_dir_operations;
|
|
extern const struct file_operations sysfs_file_operations;
|
|
extern const struct file_operations bin_fops;
|
|
extern const struct inode_operations sysfs_dir_inode_operations;
|
|
extern const struct inode_operations sysfs_symlink_inode_operations;
|
|
|
|
static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
|
|
{
|
|
if (sd) {
|
|
WARN_ON(!atomic_read(&sd->s_count));
|
|
atomic_inc(&sd->s_count);
|
|
}
|
|
return sd;
|
|
}
|
|
|
|
static inline void sysfs_put(struct sysfs_dirent * sd)
|
|
{
|
|
if (sd && atomic_dec_and_test(&sd->s_count))
|
|
release_sysfs_dirent(sd);
|
|
}
|
|
|
|
static inline int sysfs_is_shadowed_inode(struct inode *inode)
|
|
{
|
|
return S_ISDIR(inode->i_mode) && inode->i_op->follow_link;
|
|
}
|