-struct sysfs_dirent {
- atomic_t s_count;
- struct list_head s_sibling;
- struct list_head s_children;
- void * s_element;
- int s_type;
- umode_t s_mode;
- ino_t s_ino;
- struct dentry * s_dentry;
- struct iattr * s_iattr;
- atomic_t s_event;
+/*
+ * fs/sysfs/sysfs.h - sysfs internal header file
+ *
+ * Copyright (c) 2001-3 Patrick Mochel
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include <linux/lockdep.h>
+#include <linux/fs.h>
+
+struct sysfs_open_dirent;
+
+/* type-specific structures for sysfs_dirent->s_* union members */
+struct sysfs_elem_dir {
+ struct kobject *kobj;
+ /* children list starts here and goes through sd->s_sibling */
+ struct sysfs_dirent *children;
};
-extern struct vfsmount * sysfs_mount;
-extern struct kmem_cache *sysfs_dir_cachep;
+struct sysfs_elem_symlink {
+ struct sysfs_dirent *target_sd;
+};
-extern void sysfs_delete_inode(struct inode *inode);
-extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
-extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
+struct sysfs_elem_attr {
+ struct attribute *attr;
+ struct sysfs_open_dirent *open;
+};
-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);
+struct sysfs_elem_bin_attr {
+ struct bin_attribute *bin_attr;
+ struct hlist_head buffers;
+};
-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);
+struct sysfs_inode_attrs {
+ struct iattr ia_iattr;
+ void *ia_secdata;
+ u32 ia_secdata_len;
+};
-extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
-extern void sysfs_remove_subdir(struct dentry *);
+/*
+ * sysfs_dirent - the building block of sysfs hierarchy. Each and
+ * every sysfs node is represented by single sysfs_dirent.
+ *
+ * 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;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lockdep_map dep_map;
+#endif
+ struct sysfs_dirent *s_parent;
+ struct sysfs_dirent *s_sibling;
+ const char *s_name;
+
+ union {
+ struct sysfs_elem_dir s_dir;
+ struct sysfs_elem_symlink s_symlink;
+ struct sysfs_elem_attr s_attr;
+ struct sysfs_elem_bin_attr s_bin_attr;
+ };
+
+ unsigned int s_flags;
+ unsigned short s_mode;
+ ino_t s_ino;
+ struct sysfs_inode_attrs *s_iattr;
+};
-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);
+#define SD_DEACTIVATED_BIAS INT_MIN
-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;
+#define SYSFS_TYPE_MASK 0x00ff
+#define SYSFS_DIR 0x0001
+#define SYSFS_KOBJ_ATTR 0x0002
+#define SYSFS_KOBJ_BIN_ATTR 0x0004
+#define SYSFS_KOBJ_LINK 0x0008
+#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
+#define SYSFS_ACTIVE_REF (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR)
-struct sysfs_symlink {
- char * link_name;
- struct kobject * target_kobj;
-};
+#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
+#define SYSFS_FLAG_REMOVED 0x0200
-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;
-};
+static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
+{
+ return sd->s_flags & SYSFS_TYPE_MASK;
+}
-struct sysfs_buffer_collection {
- struct list_head associates;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define sysfs_dirent_init_lockdep(sd) \
+do { \
+ struct attribute *attr = sd->s_attr.attr; \
+ struct lock_class_key *key = attr->key; \
+ if (!key) \
+ key = &attr->skey; \
+ \
+ lockdep_init_map(&sd->dep_map, "s_active", key, 0); \
+} while(0)
+#else
+#define sysfs_dirent_init_lockdep(sd) do {} while(0)
+#endif
+
+/*
+ * Context structure to be used while adding/removing nodes.
+ */
+struct sysfs_addrm_cxt {
+ struct sysfs_dirent *parent_sd;
+ struct sysfs_dirent *removed;
};
-static inline struct kobject * to_kobj(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct kobject *) sd->s_element);
-}
+/*
+ * mount.c
+ */
+extern struct sysfs_dirent sysfs_root;
+extern struct super_block *sysfs_sb;
+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);
-}
+/*
+ * dir.c
+ */
+extern struct mutex sysfs_mutex;
+extern spinlock_t sysfs_assoc_lock;
-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 const struct file_operations sysfs_dir_operations;
+extern const struct inode_operations sysfs_dir_inode_operations;
-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);
+struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
+struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
+void sysfs_put_active(struct sysfs_dirent *sd);
+void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
+ struct sysfs_dirent *parent_sd);
+int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
+int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
+void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
+void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
- return kobj;
-}
+struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name);
+struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name);
+struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type);
-static inline void release_sysfs_dirent(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);
-}
+void release_sysfs_dirent(struct sysfs_dirent *sd);
+
+int sysfs_create_subdir(struct kobject *kobj, const char *name,
+ struct sysfs_dirent **p_sd);
+void sysfs_remove_subdir(struct sysfs_dirent *sd);
-static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
+int sysfs_rename(struct sysfs_dirent *sd,
+ struct sysfs_dirent *new_parent_sd, const char *new_name);
+
+static inline struct sysfs_dirent *__sysfs_get(struct sysfs_dirent *sd)
{
if (sd) {
WARN_ON(!atomic_read(&sd->s_count));
}
return sd;
}
+#define sysfs_get(sd) __sysfs_get(sd)
-static inline void sysfs_put(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);
}
+#define sysfs_put(sd) __sysfs_put(sd)
+
+/*
+ * inode.c
+ */
+struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
+void sysfs_delete_inode(struct inode *inode);
+int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr);
+int sysfs_permission(struct inode *inode, int mask);
+int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
+int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
+int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
+ size_t size, int flags);
+int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
+int sysfs_inode_init(void);
+
+/*
+ * file.c
+ */
+extern const struct file_operations sysfs_file_operations;
-static inline int sysfs_is_shadowed_inode(struct inode *inode)
-{
- return S_ISDIR(inode->i_mode) && inode->i_op->follow_link;
-}
+int sysfs_add_file(struct sysfs_dirent *dir_sd,
+ const struct attribute *attr, int type);
+
+int sysfs_add_file_mode(struct sysfs_dirent *dir_sd,
+ const struct attribute *attr, int type, mode_t amode);
+/*
+ * bin.c
+ */
+extern const struct file_operations bin_fops;
+void unmap_bin_file(struct sysfs_dirent *attr_sd);
+
+/*
+ * symlink.c
+ */
+extern const struct inode_operations sysfs_symlink_inode_operations;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff