1 #ifndef __VFS_CONST_H__ 2 #define __VFS_CONST_H__ 3 4 /* Tables sizes */ 5 #define NR_FILPS 1024 /* # slots in filp table */ 6 #define NR_LOCKS 8 /* # slots in the file locking table */ 7 #define NR_MNTS 16 /* # slots in mount table */ 8 #define NR_VNODES 1024 /* # slots in vnode table */ 9 #define NR_WTHREADS 9 /* # slots in worker thread table */ 10 #define NR_SOCKDEVS 8 /* # slots in smap table */ 11 12 #define NR_NONEDEVS NR_MNTS /* # slots in nonedev bitmap */ 13 14 /* Miscellaneous constants */ 15 #define SU_UID ((uid_t) 0) /* super_user's uid_t */ 16 #define SYS_UID ((uid_t) 0) /* uid_t for system processes and INIT */ 17 #define SYS_GID ((gid_t) 0) /* gid_t for system processes and INIT */ 18 19 #define FP_BLOCKED_ON_NONE 0 /* not blocked */ 20 #define FP_BLOCKED_ON_PIPE 1 /* susp'd on pipe */ 21 #define FP_BLOCKED_ON_FLOCK 2 /* susp'd on file lock */ 22 #define FP_BLOCKED_ON_POPEN 3 /* susp'd on pipe open */ 23 #define FP_BLOCKED_ON_SELECT 4 /* susp'd on select */ 24 #define FP_BLOCKED_ON_CDEV 5 /* blocked on character device I/O */ 25 #define FP_BLOCKED_ON_SDEV 6 /* blocked on socket I/O */ 26 27 /* test if the process is blocked on something */ 28 #define fp_is_blocked(fp) ((fp)->fp_blocked_on != FP_BLOCKED_ON_NONE) 29 30 #define INVALID_THREAD ((thread_t) -1) /* known-invalid thread ID */ 31 32 #define SYMLOOP 16 33 34 #define LABEL_MAX 16 /* maximum label size (including '\0'). Should 35 * not be smaller than 16 or bigger than 36 * M_PATH_STRING_MAX. 37 */ 38 #define FSTYPE_MAX VFS_NAMELEN /* maximum file system type size */ 39 40 /* possible select() operation types; read, write, errors */ 41 #define SEL_RD CDEV_OP_RD 42 #define SEL_WR CDEV_OP_WR 43 #define SEL_ERR CDEV_OP_ERR 44 #define SEL_NOTIFY CDEV_NOTIFY /* not a real select operation */ 45 /* If these constants diverge, VFS must be extended to perform mapping. */ 46 #if (CDEV_OP_RD != SDEV_OP_RD || CDEV_OP_WR != SDEV_OP_WR || \ 47 CDEV_OP_ERR != SDEV_OP_ERR || CDEV_NOTIFY != SDEV_NOTIFY) 48 #error "CDEV and SDEV select constants are different" 49 #endif 50 51 /* special driver endpoint for CTTY_MAJOR; must be able to pass isokendpt() */ 52 #define CTTY_ENDPT VFS_PROC_NR 53 54 #endif 55