auto_fs.h
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上传日期:2013-04-10
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- /* -*- linux-c -*- ------------------------------------------------------- *
- *
- * linux/include/linux/auto_fs.h
- *
- * Copyright 1997 Transmeta Corporation - All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
- * ----------------------------------------------------------------------- */
- #ifndef _LINUX_AUTO_FS_H
- #define _LINUX_AUTO_FS_H
- #ifdef __KERNEL__
- #include <linux/version.h>
- #include <linux/fs.h>
- #include <linux/limits.h>
- #include <asm/types.h>
- #endif /* __KERNEL__ */
- #include <linux/ioctl.h>
- /* This file describes autofs v3 */
- #define AUTOFS_PROTO_VERSION 3
- /* Range of protocol versions defined */
- #define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
- #define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
- /*
- * Architectures where both 32- and 64-bit binaries can be executed
- * on 64-bit kernels need this. This keeps the structure format
- * uniform, and makes sure the wait_queue_token isn't too big to be
- * passed back down to the kernel.
- *
- * This assumes that on these architectures:
- * mode 32 bit 64 bit
- * -------------------------
- * int 32 bit 32 bit
- * long 32 bit 64 bit
- *
- * If so, 32-bit user-space code should be backwards compatible.
- */
- #if defined(__sparc__) || defined(__mips__) || defined(__s390__) || defined(__x86_64__)
- typedef unsigned int autofs_wqt_t;
- #else
- typedef unsigned long autofs_wqt_t;
- #endif
- /* Packet types */
- #define autofs_ptype_missing 0 /* Missing entry (mount request) */
- #define autofs_ptype_expire 1 /* Expire entry (umount request) */
- struct autofs_packet_hdr {
- int proto_version; /* Protocol version */
- int type; /* Type of packet */
- };
- struct autofs_packet_missing {
- struct autofs_packet_hdr hdr;
- autofs_wqt_t wait_queue_token;
- int len;
- char name[NAME_MAX+1];
- };
- /* v3 expire (via ioctl) */
- struct autofs_packet_expire {
- struct autofs_packet_hdr hdr;
- int len;
- char name[NAME_MAX+1];
- };
- #define AUTOFS_IOC_READY _IO(0x93,0x60)
- #define AUTOFS_IOC_FAIL _IO(0x93,0x61)
- #define AUTOFS_IOC_CATATONIC _IO(0x93,0x62)
- #define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int)
- #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
- #define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire)
- #endif /* _LINUX_AUTO_FS_H */