struct super_block;
struct file_system_type;
-struct sysfs_open_dirent;
-struct sysfs_inode_attrs;
+struct kernfs_open_node;
+struct kernfs_iattrs;
enum kernfs_node_type {
- SYSFS_DIR = 0x0001,
- SYSFS_KOBJ_ATTR = 0x0002,
- SYSFS_KOBJ_LINK = 0x0004,
+ KERNFS_DIR = 0x0001,
+ KERNFS_FILE = 0x0002,
+ KERNFS_LINK = 0x0004,
};
-#define SYSFS_TYPE_MASK 0x000f
-#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
-#define SYSFS_ACTIVE_REF SYSFS_KOBJ_ATTR
-#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
+#define KERNFS_TYPE_MASK 0x000f
+#define KERNFS_COPY_NAME (KERNFS_DIR | KERNFS_LINK)
+#define KERNFS_ACTIVE_REF KERNFS_FILE
+#define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK
enum kernfs_node_flag {
- SYSFS_FLAG_REMOVED = 0x0010,
- SYSFS_FLAG_NS = 0x0020,
- SYSFS_FLAG_HAS_SEQ_SHOW = 0x0040,
- SYSFS_FLAG_HAS_MMAP = 0x0080,
- SYSFS_FLAG_LOCKDEP = 0x0100,
+ KERNFS_REMOVED = 0x0010,
+ KERNFS_NS = 0x0020,
+ KERNFS_HAS_SEQ_SHOW = 0x0040,
+ KERNFS_HAS_MMAP = 0x0080,
+ KERNFS_LOCKDEP = 0x0100,
};
-/* type-specific structures for sysfs_dirent->s_* union members */
-struct sysfs_elem_dir {
+/* type-specific structures for kernfs_node union members */
+struct kernfs_elem_dir {
unsigned long subdirs;
- /* children rbtree starts here and goes through sd->s_rb */
+ /* children rbtree starts here and goes through kn->rb */
struct rb_root children;
/*
* The kernfs hierarchy this directory belongs to. This fits
- * better directly in sysfs_dirent but is here to save space.
+ * better directly in kernfs_node but is here to save space.
*/
struct kernfs_root *root;
};
-struct sysfs_elem_symlink {
- struct sysfs_dirent *target_sd;
+struct kernfs_elem_symlink {
+ struct kernfs_node *target_kn;
};
-struct sysfs_elem_attr {
+struct kernfs_elem_attr {
const struct kernfs_ops *ops;
- struct sysfs_open_dirent *open;
+ struct kernfs_open_node *open;
loff_t size;
};
/*
- * sysfs_dirent - the building block of sysfs hierarchy. Each and every
- * sysfs node is represented by single sysfs_dirent. Most fields are
+ * kernfs_node - the building block of kernfs hierarchy. Each and every
+ * kernfs node is represented by single kernfs_node. Most fields are
* private to kernfs and shouldn't be accessed directly by kernfs users.
*
- * 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.
+ * As long as s_count reference is held, the kernfs_node itself is
+ * accessible. Dereferencing elem or any other outer entity requires
+ * active reference.
*/
-struct sysfs_dirent {
- atomic_t s_count;
- atomic_t s_active;
+struct kernfs_node {
+ atomic_t count;
+ atomic_t active;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
/* the following two fields are published */
- struct sysfs_dirent *s_parent;
- const char *s_name;
+ struct kernfs_node *parent;
+ const char *name;
- struct rb_node s_rb;
+ struct rb_node rb;
union {
struct completion *completion;
- struct sysfs_dirent *removed_list;
+ struct kernfs_node *removed_list;
} u;
- const void *s_ns; /* namespace tag */
- unsigned int s_hash; /* ns + name hash */
+ const void *ns; /* namespace tag */
+ unsigned int hash; /* ns + name hash */
union {
- struct sysfs_elem_dir s_dir;
- struct sysfs_elem_symlink s_symlink;
- struct sysfs_elem_attr s_attr;
+ struct kernfs_elem_dir dir;
+ struct kernfs_elem_symlink symlink;
+ struct kernfs_elem_attr attr;
};
void *priv;
- unsigned short s_flags;
- umode_t s_mode;
- unsigned int s_ino;
- struct sysfs_inode_attrs *s_iattr;
+ unsigned short flags;
+ umode_t mode;
+ unsigned int ino;
+ struct kernfs_iattrs *iattr;
};
struct kernfs_root {
/* published fields */
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
/* private fields, do not use outside kernfs proper */
struct ida ino_ida;
};
-struct sysfs_open_file {
+struct kernfs_open_file {
/* published fields */
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
struct file *file;
/* private fields, do not use outside kernfs proper */
* If seq_show() is present, seq_file path is active. Other seq
* operations are optional and if not implemented, the behavior is
* equivalent to single_open(). @sf->private points to the
- * associated sysfs_open_file.
+ * associated kernfs_open_file.
*
* read() is bounced through kernel buffer and a read larger than
* PAGE_SIZE results in partial operation of PAGE_SIZE.
void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
void (*seq_stop)(struct seq_file *sf, void *v);
- ssize_t (*read)(struct sysfs_open_file *of, char *buf, size_t bytes,
+ ssize_t (*read)(struct kernfs_open_file *of, char *buf, size_t bytes,
loff_t off);
/*
* write() is bounced through kernel buffer and a write larger than
* PAGE_SIZE results in partial operation of PAGE_SIZE.
*/
- ssize_t (*write)(struct sysfs_open_file *of, char *buf, size_t bytes,
+ ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes,
loff_t off);
- int (*mmap)(struct sysfs_open_file *of, struct vm_area_struct *vma);
+ int (*mmap)(struct kernfs_open_file *of, struct vm_area_struct *vma);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lock_class_key lockdep_key;
#ifdef CONFIG_SYSFS
-static inline enum kernfs_node_type sysfs_type(struct sysfs_dirent *sd)
+static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
{
- return sd->s_flags & SYSFS_TYPE_MASK;
+ return kn->flags & KERNFS_TYPE_MASK;
}
/**
* kernfs_enable_ns - enable namespace under a directory
- * @sd: directory of interest, should be empty
+ * @kn: directory of interest, should be empty
*
- * This is to be called right after @sd is created to enable namespace
- * under it. All children of @sd must have non-NULL namespace tags and
+ * This is to be called right after @kn is created to enable namespace
+ * under it. All children of @kn must have non-NULL namespace tags and
* only the ones which match the super_block's tag will be visible.
*/
-static inline void kernfs_enable_ns(struct sysfs_dirent *sd)
+static inline void kernfs_enable_ns(struct kernfs_node *kn)
{
- WARN_ON_ONCE(sysfs_type(sd) != SYSFS_DIR);
- WARN_ON_ONCE(!RB_EMPTY_ROOT(&sd->s_dir.children));
- sd->s_flags |= SYSFS_FLAG_NS;
+ WARN_ON_ONCE(kernfs_type(kn) != KERNFS_DIR);
+ WARN_ON_ONCE(!RB_EMPTY_ROOT(&kn->dir.children));
+ kn->flags |= KERNFS_NS;
}
-struct sysfs_dirent *kernfs_find_and_get_ns(struct sysfs_dirent *parent,
- const char *name, const void *ns);
-void kernfs_get(struct sysfs_dirent *sd);
-void kernfs_put(struct sysfs_dirent *sd);
+/**
+ * kernfs_ns_enabled - test whether namespace is enabled
+ * @kn: the node to test
+ *
+ * Test whether namespace filtering is enabled for the children of @ns.
+ */
+static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
+{
+ return kn->flags & KERNFS_NS;
+}
+
+struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
+ const char *name, const void *ns);
+void kernfs_get(struct kernfs_node *kn);
+void kernfs_put(struct kernfs_node *kn);
struct kernfs_root *kernfs_create_root(void *priv);
void kernfs_destroy_root(struct kernfs_root *root);
-struct sysfs_dirent *kernfs_create_dir_ns(struct sysfs_dirent *parent,
- const char *name, void *priv,
- const void *ns);
-struct sysfs_dirent *kernfs_create_file_ns_key(struct sysfs_dirent *parent,
- const char *name,
- umode_t mode, loff_t size,
- const struct kernfs_ops *ops,
- void *priv, const void *ns,
- struct lock_class_key *key);
-struct sysfs_dirent *kernfs_create_link(struct sysfs_dirent *parent,
- const char *name,
- struct sysfs_dirent *target);
-void kernfs_remove(struct sysfs_dirent *sd);
-int kernfs_remove_by_name_ns(struct sysfs_dirent *parent, const char *name,
+struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
+ const char *name, void *priv,
+ const void *ns);
+struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent,
+ const char *name,
+ umode_t mode, loff_t size,
+ const struct kernfs_ops *ops,
+ void *priv, const void *ns,
+ struct lock_class_key *key);
+struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
+ const char *name,
+ struct kernfs_node *target);
+void kernfs_remove(struct kernfs_node *kn);
+int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
const void *ns);
-int kernfs_rename_ns(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent,
+int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
const char *new_name, const void *new_ns);
-int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr);
-void kernfs_notify(struct sysfs_dirent *sd);
+int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr);
+void kernfs_notify(struct kernfs_node *kn);
const void *kernfs_super_ns(struct super_block *sb);
struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags,
#else /* CONFIG_SYSFS */
-static inline enum kernfs_node_type sysfs_type(struct sysfs_dirent *sd)
+static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
{ return 0; } /* whatever */
-static inline void kernfs_enable_ns(struct sysfs_dirent *sd) { }
+static inline void kernfs_enable_ns(struct kernfs_node *kn) { }
+
+static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
+{ return false; }
-static inline struct sysfs_dirent *
-kernfs_find_and_get_ns(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name,
const void *ns)
{ return NULL; }
-static inline void kernfs_get(struct sysfs_dirent *sd) { }
-static inline void kernfs_put(struct sysfs_dirent *sd) { }
+static inline void kernfs_get(struct kernfs_node *kn) { }
+static inline void kernfs_put(struct kernfs_node *kn) { }
static inline struct kernfs_root *kernfs_create_root(void *priv)
{ return ERR_PTR(-ENOSYS); }
static inline void kernfs_destroy_root(struct kernfs_root *root) { }
-static inline struct sysfs_dirent *
-kernfs_create_dir_ns(struct sysfs_dirent *parent, const char *name, void *priv,
+static inline struct kernfs_node *
+kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, void *priv,
const void *ns)
{ return ERR_PTR(-ENOSYS); }
-static inline struct sysfs_dirent *
-kernfs_create_file_ns_key(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_create_file_ns_key(struct kernfs_node *parent, const char *name,
umode_t mode, loff_t size,
const struct kernfs_ops *ops, void *priv,
const void *ns, struct lock_class_key *key)
{ return ERR_PTR(-ENOSYS); }
-static inline struct sysfs_dirent *
-kernfs_create_link(struct sysfs_dirent *parent, const char *name,
- struct sysfs_dirent *target)
+static inline struct kernfs_node *
+kernfs_create_link(struct kernfs_node *parent, const char *name,
+ struct kernfs_node *target)
{ return ERR_PTR(-ENOSYS); }
-static inline void kernfs_remove(struct sysfs_dirent *sd) { }
+static inline void kernfs_remove(struct kernfs_node *kn) { }
-static inline int kernfs_remove_by_name_ns(struct sysfs_dirent *parent,
+static inline int kernfs_remove_by_name_ns(struct kernfs_node *kn,
const char *name, const void *ns)
{ return -ENOSYS; }
-static inline int kernfs_rename_ns(struct sysfs_dirent *sd,
- struct sysfs_dirent *new_parent,
+static inline int kernfs_rename_ns(struct kernfs_node *kn,
+ struct kernfs_node *new_parent,
const char *new_name, const void *new_ns)
{ return -ENOSYS; }
-static inline int kernfs_setattr(struct sysfs_dirent *sd,
+static inline int kernfs_setattr(struct kernfs_node *kn,
const struct iattr *iattr)
{ return -ENOSYS; }
-static inline void kernfs_notify(struct sysfs_dirent *sd) { }
+static inline void kernfs_notify(struct kernfs_node *kn) { }
static inline const void *kernfs_super_ns(struct super_block *sb)
{ return NULL; }
#endif /* CONFIG_SYSFS */
-static inline struct sysfs_dirent *
-kernfs_find_and_get(struct sysfs_dirent *sd, const char *name)
+static inline struct kernfs_node *
+kernfs_find_and_get(struct kernfs_node *kn, const char *name)
{
- return kernfs_find_and_get_ns(sd, name, NULL);
+ return kernfs_find_and_get_ns(kn, name, NULL);
}
-static inline struct sysfs_dirent *
-kernfs_create_dir(struct sysfs_dirent *parent, const char *name, void *priv)
+static inline struct kernfs_node *
+kernfs_create_dir(struct kernfs_node *parent, const char *name, void *priv)
{
return kernfs_create_dir_ns(parent, name, priv, NULL);
}
-static inline struct sysfs_dirent *
-kernfs_create_file_ns(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_create_file_ns(struct kernfs_node *parent, const char *name,
umode_t mode, loff_t size, const struct kernfs_ops *ops,
void *priv, const void *ns)
{
ns, key);
}
-static inline struct sysfs_dirent *
-kernfs_create_file(struct sysfs_dirent *parent, const char *name, umode_t mode,
+static inline struct kernfs_node *
+kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode,
loff_t size, const struct kernfs_ops *ops, void *priv)
{
return kernfs_create_file_ns(parent, name, mode, size, ops, priv, NULL);
}
-static inline int kernfs_remove_by_name(struct sysfs_dirent *parent,
+static inline int kernfs_remove_by_name(struct kernfs_node *parent,
const char *name)
{
return kernfs_remove_by_name_ns(parent, name, NULL);
projects / karo-tx-linux.git / blobdiff