#include <linux/lockdep.h>
#include <linux/fs.h>
-#include <linux/rbtree.h>
#include <linux/mutex.h>
+#include <linux/xattr.h>
#include <linux/kernfs.h>
-struct sysfs_open_dirent;
+struct kernfs_iattrs {
+ struct iattr ia_iattr;
+ void *ia_secdata;
+ u32 ia_secdata_len;
-/* type-specific structures for sysfs_dirent->s_* union members */
-struct sysfs_elem_dir {
- unsigned long subdirs;
- /* children rbtree starts here and goes through sd->s_rb */
- struct rb_root children;
+ struct simple_xattrs xattrs;
};
-struct sysfs_elem_symlink {
- struct sysfs_dirent *target_sd;
-};
-
-struct sysfs_elem_attr {
- const struct kernfs_ops *ops;
- struct sysfs_open_dirent *open;
- loff_t size;
-};
+#define KN_DEACTIVATED_BIAS INT_MIN
-struct sysfs_inode_attrs {
- struct iattr ia_iattr;
- void *ia_secdata;
- u32 ia_secdata_len;
-};
+/* KERNFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
-/*
- * sysfs_dirent - the building block of sysfs hierarchy. Each and
- * every sysfs node is represented by single sysfs_dirent.
+/**
+ * kernfs_root - find out the kernfs_root a kernfs_node belongs to
+ * @kn: kernfs_node of interest
*
- * 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.
+ * Return the kernfs_root @kn belongs to.
*/
-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;
- const char *s_name;
-
- struct rb_node s_rb;
-
- union {
- struct completion *completion;
- struct sysfs_dirent *removed_list;
- } u;
-
- const void *s_ns; /* namespace tag */
- unsigned int s_hash; /* ns + name hash */
- union {
- struct sysfs_elem_dir s_dir;
- struct sysfs_elem_symlink s_symlink;
- struct sysfs_elem_attr s_attr;
- };
-
- void *priv;
-
- unsigned short s_flags;
- umode_t s_mode;
- unsigned int s_ino;
- struct sysfs_inode_attrs *s_iattr;
-};
-
-#define SD_DEACTIVATED_BIAS INT_MIN
-
-#define SYSFS_TYPE_MASK 0x000f
-#define SYSFS_DIR 0x0001
-#define SYSFS_KOBJ_ATTR 0x0002
-#define SYSFS_KOBJ_LINK 0x0004
-#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
-#define SYSFS_ACTIVE_REF SYSFS_KOBJ_ATTR
-
-#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
-#define SYSFS_FLAG_REMOVED 0x0010
-#define SYSFS_FLAG_NS 0x0020
-#define SYSFS_FLAG_HAS_SEQ_SHOW 0x0040
-#define SYSFS_FLAG_HAS_MMAP 0x0080
-#define SYSFS_FLAG_LOCKDEP 0x0100
-
-static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
+static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
{
- return sd->s_flags & SYSFS_TYPE_MASK;
+ /* if parent exists, it's always a dir; otherwise, @sd is a dir */
+ if (kn->parent)
+ kn = kn->parent;
+ return kn->dir.root;
}
/*
* Context structure to be used while adding/removing nodes.
*/
-struct sysfs_addrm_cxt {
- struct sysfs_dirent *removed;
+struct kernfs_addrm_cxt {
+ struct kernfs_node *removed;
+};
+
+/*
+ * mount.c
+ */
+struct kernfs_super_info {
+ /*
+ * The root associated with this super_block. Each super_block is
+ * identified by the root and ns it's associated with.
+ */
+ struct kernfs_root *root;
+
+ /*
+ * Each sb is associated with one namespace tag, currently the
+ * network namespace of the task which mounted this kernfs
+ * instance. If multiple tags become necessary, make the following
+ * an array and compare kernfs_node tag against every entry.
+ */
+ const void *ns;
};
+#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
-#include "../sysfs/sysfs.h"
+extern struct kmem_cache *sysfs_dir_cachep;
/*
* inode.c
*/
-struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
+struct inode *sysfs_get_inode(struct super_block *sb, struct kernfs_node *kn);
void sysfs_evict_inode(struct inode *inode);
int sysfs_permission(struct inode *inode, int mask);
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
struct kstat *stat);
int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags);
-int sysfs_inode_init(void);
+int sysfs_removexattr(struct dentry *dentry, const char *name);
+ssize_t sysfs_getxattr(struct dentry *dentry, const char *name, void *buf,
+ size_t size);
+ssize_t sysfs_listxattr(struct dentry *dentry, char *buf, size_t size);
+void sysfs_inode_init(void);
/*
* dir.c
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
-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);
-int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
- struct sysfs_dirent *parent_sd);
-void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
-struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type);
+struct kernfs_node *sysfs_get_active(struct kernfs_node *kn);
+void sysfs_put_active(struct kernfs_node *kn);
+void sysfs_addrm_start(struct kernfs_addrm_cxt *acxt);
+int sysfs_add_one(struct kernfs_addrm_cxt *acxt, struct kernfs_node *kn,
+ struct kernfs_node *parent);
+void sysfs_addrm_finish(struct kernfs_addrm_cxt *acxt);
+struct kernfs_node *sysfs_new_dirent(struct kernfs_root *root,
+ const char *name, umode_t mode, int type);
/*
* file.c
*/
extern const struct file_operations kernfs_file_operations;
-void sysfs_unmap_bin_file(struct sysfs_dirent *sd);
+void sysfs_unmap_bin_file(struct kernfs_node *kn);
/*
* symlink.c
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff