haiku/headers/private/kernel/vfs.h
Ingo Weinhold 9955b99a86 Several VFS related syscalls have been changed, added or removed.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8701 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-08-28 20:38:39 +00:00

157 lines
6.1 KiB
C
Executable File

/*
** Copyright 2002-2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
**
** 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 <kernel.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <signal.h>
#include <dirent.h>
#include <fs_interface.h>
#include <lock.h>
#include <util/list.h>
#define DEFAULT_FD_TABLE_SIZE 128
#define MAX_FD_TABLE_SIZE 2048
#define MAX_NODE_MONITORS 4096
#include <vfs_types.h>
struct kernel_args;
struct file_descriptor;
struct selectsync;
struct pollfd;
/** The I/O context of a process/team, holds the fd array among others */
typedef struct io_context {
struct vnode *cwd;
mutex io_mutex;
uint32 table_size;
uint32 num_used_fds;
struct file_descriptor **fds;
struct list node_monitors;
uint32 num_monitors;
uint32 max_monitors;
} io_context;
/* 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
status_t vfs_init(struct kernel_args *ka);
status_t vfs_bootstrap_file_systems(void);
status_t vfs_mount_boot_file_system(void);
void *vfs_new_io_context(void *parent_ioctx);
int vfs_free_io_context(void *ioctx);
struct rlimit;
int vfs_getrlimit(int resource, struct rlimit * rlp);
int vfs_setrlimit(int resource, const struct rlimit * rlp);
// ToDo: for now; this prototype should be in os/drivers/Drivers.h
// or similar places.
extern status_t notify_select_event(struct selectsync *sync, uint32 ref, uint8 event);
/* calls needed by the VM for paging */
int vfs_get_vnode_from_fd(int fd, bool kernel, void **vnode);
status_t 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);
/* special module convenience call */
status_t vfs_get_module_path(const char *basePath, const char *moduleName, char *pathBuffer, size_t bufferSize);
/* calls the syscall dispatcher should use for user file I/O */
status_t _user_mount(const char *path, const char *device, const char *fs_name, void *args);
status_t _user_unmount(const char *path);
status_t _user_read_fs_info(dev_t device, struct fs_info *info);
status_t _user_write_fs_info(dev_t device, const struct fs_info *info, int mask);
dev_t _user_next_device(int32 *_cookie);
status_t _user_sync(void);
status_t _user_entry_ref_to_path(dev_t device, ino_t inode, const char *leaf,
char *userPath, size_t pathLength);
int _user_open_entry_ref(dev_t device, ino_t inode, const char *name, int omode);
int _user_open(int fd, const char *path, int omode);
int _user_open_dir_node_ref(dev_t device, ino_t inode);
int _user_open_dir_entry_ref(dev_t device, ino_t inode, const char *uname);
int _user_open_dir(int fd, const char *path);
int _user_open_parent_dir(int fd, char *name, size_t nameLength);
status_t _user_fsync(int fd);
status_t _user_read_stat(int fd, const char *path, bool traverseLink,
struct stat *stat, size_t statSize);
status_t _user_write_stat(int fd, const char *path, bool traverseLink,
const struct stat *stat, size_t statSize, int statMask);
off_t _user_seek(int fd, off_t pos, int seekType);
int _user_create_entry_ref(dev_t device, ino_t inode, const char *uname, int omode, int perms);
int _user_create(const char *path, int omode, int perms);
status_t _user_create_dir_entry_ref(dev_t device, ino_t inode, const char *name, int perms);
status_t _user_create_dir(int fd, const char *path, int perms);
status_t _user_remove_dir(const char *path);
ssize_t _user_read_link(int fd, const char *path, char *buffer, size_t bufferSize);
status_t _user_write_link(const char *path, const char *toPath);
status_t _user_create_symlink(int fd, const char *path, const char *toPath,
int mode);
status_t _user_create_link(const char *path, const char *toPath);
status_t _user_unlink(int fd, const char *path);
status_t _user_rename(int oldFD, const char *oldpath, int newFD,
const char *newpath);
status_t _user_access(const char *path, int mode);
ssize_t _user_select(int numfds, fd_set *readSet, fd_set *writeSet, fd_set *errorSet,
bigtime_t timeout, const sigset_t *sigMask);
ssize_t _user_poll(struct pollfd *fds, int numfds, bigtime_t timeout);
int _user_open_attr_dir(int fd, const char *path);
int _user_create_attr(int fd, const char *name, uint32 type, int openMode);
int _user_open_attr(int fd, const char *name, int openMode);
status_t _user_remove_attr(int fd, const char *name);
status_t _user_rename_attr(int fromFile, const char *fromName, int toFile, const char *toName);
int _user_open_index_dir(dev_t device);
status_t _user_create_index(dev_t device, const char *name, uint32 type, uint32 flags);
status_t _user_read_index_stat(dev_t device, const char *name, struct stat *stat);
status_t _user_remove_index(dev_t device, const char *name);
status_t _user_getcwd(char *buffer, size_t size);
status_t _user_setcwd(int fd, const char *path);
int _user_open_query(dev_t device, const char *query, uint32 flags,
port_id port, int32 token);
/* fd user prototypes (implementation located in fd.c) */
extern ssize_t _user_read(int fd, off_t pos, void *buffer, size_t bufferSize);
extern ssize_t _user_write(int fd, off_t pos, const void *buffer, size_t bufferSize);
extern status_t _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 status_t _user_close(int fd);
extern int _user_dup(int fd);
extern int _user_dup2(int ofd, int nfd);
extern status_t _user_lock_node(int fd);
extern status_t _user_unlock_node(int fd);
/* vfs entry points... */
#ifdef __cplusplus
}
#endif
#endif /* _KERNEL_VFS_H */