1 /* -*- linux-c -*- ------------------------------------------------------- * 2 * 3 * linux/include/linux/auto_fs.h 4 * 5 * Copyright 1997 Transmeta Corporation - All Rights Reserved 6 * 7 * This file is part of the Linux kernel and is made available under 8 * the terms of the GNU General Public License, version 2, or at your 9 * option, any later version, incorporated herein by reference. 10 * 11 * ----------------------------------------------------------------------- */ 12 13 14 #ifndef _LINUX_AUTO_FS_H 15 #define _LINUX_AUTO_FS_H 16 17 #include <linux/types.h> 18 #ifdef __KERNEL__ 19 #include <linux/fs.h> 20 #include <linux/limits.h> 21 #include <linux/ioctl.h> 22 #else 23 #include <sys/ioctl.h> 24 #endif /* __KERNEL__ */ 25 26 /* This file describes autofs v3 */ 27 #define AUTOFS_PROTO_VERSION 3 28 29 /* Range of protocol versions defined */ 30 #define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION 31 #define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION 32 33 /* 34 * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed 35 * back to the kernel via ioctl from userspace. On architectures where 32- and 36 * 64-bit userspace binaries can be executed it's important that the size of 37 * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we 38 * do not break the binary ABI interface by changing the structure size. 39 */ 40 #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */ 41 typedef unsigned long autofs_wqt_t; 42 #else 43 typedef unsigned int autofs_wqt_t; 44 #endif 45 46 /* Packet types */ 47 #define autofs_ptype_missing 0 /* Missing entry (mount request) */ 48 #define autofs_ptype_expire 1 /* Expire entry (umount request) */ 49 50 struct autofs_packet_hdr { 51 int proto_version; /* Protocol version */ 52 int type; /* Type of packet */ 53 }; 54 55 struct autofs_packet_missing { 56 struct autofs_packet_hdr hdr; 57 autofs_wqt_t wait_queue_token; 58 int len; 59 char name[NAME_MAX+1]; 60 }; 61 62 /* v3 expire (via ioctl) */ 63 struct autofs_packet_expire { 64 struct autofs_packet_hdr hdr; 65 int len; 66 char name[NAME_MAX+1]; 67 }; 68 69 #define AUTOFS_IOC_READY _IO(0x93,0x60) 70 #define AUTOFS_IOC_FAIL _IO(0x93,0x61) 71 #define AUTOFS_IOC_CATATONIC _IO(0x93,0x62) 72 #define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int) 73 #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t) 74 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long) 75 #define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire) 76 77 #endif /* _LINUX_AUTO_FS_H */ 78