Rework VFS

[Nicolas Pouillon]

VFS types

struct vfs_mount_state_s {

vfs_fs_open_t *open; vfs_fs_lookup_t *lookup; vfs_fs_create_t *create; vfs_fs_link_t *link; vfs_fs_unlink_t *unlink; vfs_fs_stat_t *stat;

struct vfs_node_dir_s *old_node; struct vfs_node_dir_s *root;

};

/* base object, inherited twice */ struct vfs_node_base_s {

CONTAINER_ENTRY_TYPE(HASHLIST) hash_entry; enum vfs_node_type_e type; struct vfs_mount_state_s *mount; char name[CONFIG_VFS_NAMELEN]; struct vfs_node_dir_s *parent;

};

struct vfs_node_dir_s {

struct vfs_node_base_s base; vfs_node_dir_entry_t obj_entry; vfs_dir_hash_root_t children;

};

struct vfs_node_leaf_s {

struct vfs_node_base_s base; vfs_node_leaf_entry_t obj_entry;

};

/* opened file, it defines the operations */ struct vfs_file_s {

struct vfs_node_s *node; vfs_file_close_t *close; vfs_file_read_t *read; vfs_file_write_t *write; vfs_file_seek_t *seek;

};

VFS operations

error_t vfs_mount(struct vfs_node_dir_s *mountpoint,

struct vfs_node_dir_s *fs_root);

error_t vfs_umount(struct vfs_node_dir_s *fs_root);

error_t vfs_node_lookup(struct vfs_node_dir_s *parent,

const char *name, size_t namelen, struct vfs_node_base_s node);

error_t vfs_node_create(struct vfs_mount_state_s *fs,

enum vfs_node_type_e type, struct vfs_node_base_s node);

error_t vfs_node_link(struct vfs_node_dir_s *parent,

struct vfs_node_base_s *node, const char *name, size_t namelen);

error_t vfs_node_unlink(struct vfs_node_dir_s *parent,

const char *name, size_t namelen);

error_t vfs_node_stat(struct vfs_node_base_s *node,

struct vfs_stat_s *stat);

error_t vfs_file_open(struct vfs_node_leaf_s *ref,

struct vfs_file_s file);