minix/servers/vfs/const.h
David van Moolenbroek 7113bcb896 Redo mount(2)/umount(2) ABI
- pass in file system type through mount(2), and return this type in
  statvfs structures as generated by [f]statvfs(2);
- align mount flags field with NetBSD's, splitting out service flags
  which are not to be passed to VFS;
- remove limitation of mount ABI to 16-byte labels, so that labels
  can be made larger in the future;
- introduce new m11 message union type for mount(2) as side effect.

Change-Id: I88b7710e297e00a5e4582ada5243d3d5c2801fd9
2014-02-18 11:25:01 +01:00

53 lines
2 KiB
C

#ifndef __VFS_CONST_H__
#define __VFS_CONST_H__
/* Tables sizes */
#define NR_FILPS 1024 /* # slots in filp table */
#define NR_LOCKS 8 /* # slots in the file locking table */
#define NR_MNTS 16 /* # slots in mount table */
#define NR_VNODES 1024 /* # slots in vnode table */
#define NR_WTHREADS 8 /* # slots in worker thread table */
#define NR_NONEDEVS NR_MNTS /* # slots in nonedev bitmap */
/* Miscellaneous constants */
#define SU_UID ((uid_t) 0) /* super_user's uid_t */
#define SYS_UID ((uid_t) 0) /* uid_t for system processes and INIT */
#define SYS_GID ((gid_t) 0) /* gid_t for system processes and INIT */
#define FP_BLOCKED_ON_NONE 0 /* not blocked */
#define FP_BLOCKED_ON_PIPE 1 /* susp'd on pipe */
#define FP_BLOCKED_ON_LOCK 2 /* susp'd on lock */
#define FP_BLOCKED_ON_POPEN 3 /* susp'd on pipe open */
#define FP_BLOCKED_ON_SELECT 4 /* susp'd on select */
#define FP_BLOCKED_ON_DOPEN 5 /* susp'd on device open */
#define FP_BLOCKED_ON_OTHER 6 /* blocked on other process, check
fp_task to find out */
/* test if the process is blocked on something */
#define fp_is_blocked(fp) ((fp)->fp_blocked_on != FP_BLOCKED_ON_NONE)
/* test if reply is a driver reply */
#define IS_DRV_REPLY(x) (IS_DEV_RS(x) || IS_BDEV_RS(x) || (x) == TASK_REPLY)
#define DUP_MASK 0100 /* mask to distinguish dup2 from dup */
#define LOOK_UP 0 /* tells search_dir to lookup string */
#define ENTER 1 /* tells search_dir to make dir entry */
#define DELETE 2 /* tells search_dir to delete entry */
#define IS_EMPTY 3 /* tells search_dir to ret. OK or ENOTEMPTY */
#define SYMLOOP 16
#define LABEL_MAX 16 /* maximum label size (including '\0'). Should
* not be smaller than 16 or bigger than
* M3_LONG_STRING.
*/
#define FSTYPE_MAX VFS_NAMELEN /* maximum file system type size */
/* Args to dev_io */
#define VFS_DEV_READ 2001
#define VFS_DEV_WRITE 2002
#define VFS_DEV_IOCTL 2005
#define VFS_DEV_SELECT 2006
#endif