/* ** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. ** Distributed under the terms of the NewOS License. */ #ifndef _KERNEL_VFS_H #define _KERNEL_VFS_H #include #include #include #include #define DEFAULT_FD_TABLE_SIZE 128 #define MAX_FD_TABLE_SIZE 2048 #include /* macro to allocate a iovec array on the stack */ #define IOVECS(name, size) \ uint8 _##name[sizeof(iovecs) + (size)*sizeof(iovec)]; \ iovecs *name = (iovecs *)_##name #ifdef __cplusplus extern "C" { #endif #if 0 struct fs_calls { int (*fs_mount)(void **fs_cookie, void *flags, void *covered_vnode, fs_id id, void **priv_vnode_root); int (*fs_unmount)(void *fs_cookie); int (*fs_register_mountpoint)(void *fs_cookie, void *vnode, void *redir_vnode); int (*fs_unregister_mountpoint)(void *fs_cookie, void *vnode); int (*fs_dispose_vnode)(void *fs_cookie, void *vnode); int (*fs_open)(void *fs_cookie, void *base_vnode, const char *path, const char *stream, stream_type stream_type, void **vnode, void **cookie, struct redir_struct *redir); int (*fs_seek)(void *fs_cookie, void *vnode, void *cookie, off_t pos, int seek_type); int (*fs_read)(void *fs_cookie, void *vnode, void *cookie, void *buf, off_t pos, size_t *len); int (*fs_write)(void *fs_cookie, void *vnode, void *cookie, const void *buf, off_t pos, size_t *len); int (*fs_ioctl)(void *fs_cookie, void *vnode, void *cookie, ulong op, void *buf, size_t len); int (*fs_close)(void *fs_cookie, void *vnode, void *cookie); int (*fs_create)(void *fs_cookie, void *base_vnode, const char *path, const char *stream, stream_type stream_type, struct redir_struct *redir); int (*fs_stat)(void *fs_cookie, void *base_vnode, const char *path, const char *stream, stream_type stream_type, struct vnode_stat *stat, struct redir_struct *redir); }; #endif struct fs_calls { int (*fs_mount)(fs_cookie *fs, fs_id id, const char *device, void *args, vnode_id *root_vnid); int (*fs_unmount)(fs_cookie fs); int (*fs_sync)(fs_cookie fs); int (*fs_lookup)(fs_cookie fs, fs_vnode dir, const char *name, vnode_id *id); int (*fs_get_vnode_name)(fs_cookie fs, fs_vnode vnode, char *buffer, size_t bufferSize); int (*fs_get_vnode)(fs_cookie fs, vnode_id id, fs_vnode *v, bool r); int (*fs_put_vnode)(fs_cookie fs, fs_vnode v, bool r); int (*fs_remove_vnode)(fs_cookie fs, fs_vnode v, bool r); int (*fs_can_page)(fs_cookie fs, fs_vnode v); ssize_t (*fs_read_page)(fs_cookie fs, fs_vnode v, iovecs *vecs, off_t pos); ssize_t (*fs_write_page)(fs_cookie fs, fs_vnode v, iovecs *vecs, off_t pos); /* common operations */ int (*fs_ioctl)(fs_cookie fs, fs_vnode v, file_cookie cookie, ulong op, void *buf, size_t len); int (*fs_fsync)(fs_cookie fs, fs_vnode v); int (*fs_unlink)(fs_cookie fs, fs_vnode dir, const char *name); int (*fs_rename)(fs_cookie fs, fs_vnode olddir, const char *oldname, fs_vnode newdir, const char *newname); int (*fs_read_stat)(fs_cookie fs, fs_vnode v, struct stat *stat); int (*fs_write_stat)(fs_cookie fs, fs_vnode v, struct stat *stat, int stat_mask); /* file operations */ int (*fs_create)(fs_cookie fs, fs_vnode dir, file_cookie *cookie, vnode_id *new_vnid, const char *name, int omode, int perms); int (*fs_open)(fs_cookie fs, fs_vnode v, file_cookie *cookie, int oflags); int (*fs_close)(fs_cookie fs, fs_vnode v, file_cookie cookie); int (*fs_free_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); ssize_t (*fs_read)(fs_cookie fs, fs_vnode v, file_cookie cookie, void *buf, off_t pos, size_t *len); ssize_t (*fs_write)(fs_cookie fs, fs_vnode v, file_cookie cookie, const void *buf, off_t pos, size_t *len); off_t (*fs_seek)(fs_cookie fs, fs_vnode v, file_cookie cookie, off_t pos, int seekType); /* directory operations */ int (*fs_create_dir)(fs_cookie fs, fs_vnode dir, const char *name, int perms, vnode_id *new_vnid); int (*fs_open_dir)(fs_cookie fs, fs_vnode v, file_cookie *cookie); int (*fs_close_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie); int (*fs_free_dir_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); int (*fs_read_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num); int (*fs_rewind_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie); /* attribute directory operations */ // int (*fs_open_dir)(fs_cookie fs, fs_vnode v, file_cookie *cookie, int oflags); // int (*fs_close_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_free_dir_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_read_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num); // int (*fs_rewind_dir)(fs_cookie fs, fs_vnode v, file_cookie cookie); // // /* attribute operations */ // int (*fs_open_attr)(fs_cookie fs, fs_vnode v, file_cookie *cookie, stream_type st, int oflags); // int (*fs_close_attr)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_free_attr_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); // ssize_t (*fs_read_attr)(fs_cookie fs, fs_vnode v, file_cookie cookie, void *buf, off_t pos, size_t *len); // ssize_t (*fs_write_attr)(fs_cookie fs, fs_vnode v, file_cookie cookie, const void *buf, off_t pos, size_t *len); // int (*fs_seek_attr)(fs_cookie fs, fs_vnode v, file_cookie cookie, off_t pos, int st); // // /* index operations */ // int (*fs_open_index)(fs_cookie fs, fs_vnode v, file_cookie *cookie, int oflags); // int (*fs_close_index)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_free_index_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_read_index)(fs_cookie fs, fs_vnode v, file_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num); // int (*fs_rewind_index)(fs_cookie fs, fs_vnode v, file_cookie cookie); // // /* query operations */ // int (*fs_open_query)(fs_cookie fs, fs_vnode v, file_cookie *cookie, int oflags); // int (*fs_close_query)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_free_query_cookie)(fs_cookie fs, fs_vnode v, file_cookie cookie); // int (*fs_read_query)(fs_cookie fs, fs_vnode v, file_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num); // int (*fs_rewind_query)(fs_cookie fs, fs_vnode v, file_cookie cookie); }; int vfs_init(kernel_args *ka); int vfs_bootstrap_all_filesystems(void); int vfs_register_filesystem(const char *name, struct fs_calls *calls); void *vfs_new_io_context(void *parent_ioctx); int vfs_free_io_context(void *ioctx); int vfs_test(void); struct rlimit; int vfs_getrlimit(int resource, struct rlimit * rlp); int vfs_setrlimit(int resource, const struct rlimit * rlp); image_id vfs_load_fs_module(const char *path); /* calls needed by fs internals */ int vfs_get_vnode(fs_id fsid, vnode_id vnid, fs_vnode *v); int vfs_put_vnode(fs_id fsid, vnode_id vnid); int vfs_remove_vnode(fs_id fsid, vnode_id vnid); /* calls needed by the VM for paging */ int vfs_get_vnode_from_fd(int fd, bool kernel, void **vnode); int vfs_get_vnode_from_path(const char *path, bool kernel, void **vnode); int vfs_put_vnode_ptr(void *vnode); void vfs_vnode_acquire_ref(void *vnode); void vfs_vnode_release_ref(void *vnode); ssize_t vfs_can_page(void *vnode); ssize_t vfs_read_page(void *vnode, iovecs *vecs, off_t pos); ssize_t vfs_write_page(void *vnode, iovecs *vecs, off_t pos); void *vfs_get_cache_ptr(void *vnode); int vfs_set_cache_ptr(void *vnode, void *cache); /* calls kernel code should make for file I/O */ int sys_mount(const char *path, const char *device, const char *fs_name, void *args); int sys_unmount(const char *path); int sys_sync(void); int sys_open(const char *path, int omode); int sys_open_dir(const char *path); int sys_fsync(int fd); off_t sys_seek(int fd, off_t pos, int seekType); int sys_create(const char *path, int omode, int perms); int sys_create_dir(const char *path, int perms); int sys_unlink(const char *path); int sys_rename(const char *oldpath, const char *newpath); int sys_write_stat(const char *path, struct stat *stat, int stat_mask); char *sys_getcwd(char *buf, size_t size); int sys_setcwd(const char* path); /* calls the syscall dispatcher should use for user file I/O */ int user_mount(const char *path, const char *device, const char *fs_name, void *args); int user_unmount(const char *path); int user_sync(void); int user_open(const char *path, int omode); int user_open_dir(const char *path); int user_fsync(int fd); off_t user_seek(int fd, off_t pos, int seekType); int user_create(const char *path, int omode, int perms); int user_create_dir(const char *path, int perms); int user_unlink(const char *path); int user_rename(const char *oldpath, const char *newpath); int user_read_stat(const char *path, struct stat *stat); int user_write_stat(const char *path, struct stat *stat, int stat_mask); int user_getcwd(char *buf, size_t size); int user_setcwd(const char* path); /* fd kernel prototypes (implementation located in fd.c) */ extern ssize_t sys_read(int fd, void *buf, off_t pos, size_t len); extern ssize_t sys_write(int fd, const void *buf, off_t pos, size_t len); extern int sys_ioctl(int fd, ulong cmd, void *data, size_t length); extern ssize_t sys_read_dir(int fd, struct dirent *buffer, size_t bufferSize, uint32 maxCount); extern status_t sys_rewind_dir(int fd); extern int sys_read_stat(const char *path, struct stat *stat); extern int sys_close(int fd); extern int sys_dup(int fd); extern int sys_dup2(int ofd, int nfd); /* fd user prototypes (implementation located in fd.c) */ extern ssize_t user_read(int fd, void *buf, off_t pos, size_t len); extern ssize_t user_write(int fd, const void *buf, off_t pos, size_t len); extern int user_ioctl(int fd, ulong cmd, void *data, size_t length); extern ssize_t user_read_dir(int fd, struct dirent *buffer, size_t bufferSize, uint32 maxCount); extern status_t user_rewind_dir(int fd); extern int user_fstat(int, struct stat *); extern int user_close(int fd); extern int user_dup(int fd); extern int user_dup2(int ofd, int nfd); /* vfs entry points... */ #ifdef __cplusplus } #endif #endif /* _KERNEL_VFS_H */