+struct sysfs_elem_dir {
+ struct kobject * kobj;
+};
-extern struct vfsmount * sysfs_mount;
-extern struct kmem_cache *sysfs_dir_cachep;
-
-extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
-extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
-
-extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
-extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
- umode_t, int);
-
-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 const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
-extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
-extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
+struct sysfs_elem_symlink {
+ struct sysfs_dirent * target_sd;
+};
-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 struct inode_operations sysfs_dir_inode_operations;
-extern struct inode_operations sysfs_symlink_inode_operations;
+struct sysfs_elem_attr {
+ struct attribute * attr;
+};
-struct sysfs_symlink {
- char * link_name;
- struct kobject * target_kobj;
+struct sysfs_elem_bin_attr {
+ struct bin_attribute * bin_attr;
};
-struct sysfs_buffer {
- struct list_head associates;
- size_t count;
- loff_t pos;
- char * page;
- struct sysfs_ops * ops;
- struct semaphore sem;
- int orphaned;
- int needs_read_fill;
- int event;
+/*
+ * 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;
+ atomic_t s_active;
+ struct sysfs_dirent * s_parent;
+ struct sysfs_dirent * s_sibling;
+ struct sysfs_dirent * 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;
+
+ unsigned int s_flags;
+ umode_t s_mode;
+ ino_t s_ino;
+ struct dentry * s_dentry;
+ struct iattr * s_iattr;
+ atomic_t s_event;
};
-struct sysfs_buffer_collection {
- struct list_head associates;
+#define SD_DEACTIVATED_BIAS INT_MIN
+
+struct sysfs_addrm_cxt {
+ struct sysfs_dirent *parent_sd;
+ struct inode *parent_inode;
+ struct sysfs_dirent *removed;
+ int cnt;
};
-static inline struct kobject * to_kobj(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct kobject *) sd->s_element);
-}
+extern struct vfsmount * sysfs_mount;
+extern struct sysfs_dirent sysfs_root;
+extern struct kmem_cache *sysfs_dir_cachep;
-static inline struct attribute * to_attr(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct attribute *) sd->s_element);
-}
+extern struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
+extern void sysfs_link_sibling(struct sysfs_dirent *sd);
+extern void sysfs_unlink_sibling(struct sysfs_dirent *sd);
+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_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);
+
+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 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);
+extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
+ int type);
+
+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);
+extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
-static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct bin_attribute *) sd->s_element);
-}
+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);
-static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
-{
- struct kobject * kobj = NULL;
-
- spin_lock(&dcache_lock);
- if (!d_unhashed(dentry)) {
- struct sysfs_dirent * sd = dentry->d_fsdata;
- if (sd->s_type & SYSFS_KOBJ_LINK) {
- struct sysfs_symlink * sl = sd->s_element;
- kobj = kobject_get(sl->target_kobj);
- } else
- kobj = kobject_get(sd->s_element);
- }
- spin_unlock(&dcache_lock);
+extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
- return kobj;
-}
+extern spinlock_t sysfs_assoc_lock;
+extern struct mutex sysfs_mutex;
+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 void release_sysfs_dirent(struct sysfs_dirent * sd)
+static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
{
- if (sd->s_type & SYSFS_KOBJ_LINK) {
- struct sysfs_symlink * sl = sd->s_element;
- kfree(sl->link_name);
- kobject_put(sl->target_kobj);
- kfree(sl);
- }
- kfree(sd->s_iattr);
- kmem_cache_free(sysfs_dir_cachep, sd);
+ return sd->s_flags & SYSFS_TYPE_MASK;
}
static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
static inline void sysfs_put(struct sysfs_dirent * sd)
{
- if (atomic_dec_and_test(&sd->s_count))
+ 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;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff