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