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 #ifdef __KERNEL__

    18 #include <linux/fs.h>

    19 #include <linux/limits.h>

    20 #include <asm/types.h>

    21 #endif /* __KERNEL__ */

    22 

    23 #include <linux/ioctl.h>

    24 

    25 /* This file describes autofs v3 */

    26 #define AUTOFS_PROTO_VERSION	3

    27 

    28 /* Range of protocol versions defined */

    29 #define AUTOFS_MAX_PROTO_VERSION	AUTOFS_PROTO_VERSION

    30 #define AUTOFS_MIN_PROTO_VERSION	AUTOFS_PROTO_VERSION

    31 

    32 /*

    33  * Architectures where both 32- and 64-bit binaries can be executed

    34  * on 64-bit kernels need this.  This keeps the structure format

    35  * uniform, and makes sure the wait_queue_token isn't too big to be

    36  * passed back down to the kernel.

    37  *

    38  * This assumes that on these architectures:

    39  * mode     32 bit    64 bit

    40  * -------------------------

    41  * int      32 bit    32 bit

    42  * long     32 bit    64 bit

    43  *

    44  * If so, 32-bit user-space code should be backwards compatible.

    45  */

    46 

    47 #if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \

    48  || defined(__powerpc__) || defined(__s390__)

    49 typedef unsigned int autofs_wqt_t;

    50 #else

    51 typedef unsigned long autofs_wqt_t;

    52 #endif

    53 

    54 /* Packet types */

    55 #define autofs_ptype_missing	0	/* Missing entry (mount request) */

    56 #define autofs_ptype_expire	1	/* Expire entry (umount request) */

    57 

    58 struct autofs_packet_hdr {

    59 	int proto_version;		/* Protocol version */

    60 	int type;			/* Type of packet */

    61 };

    62 

    63 struct autofs_packet_missing {

    64 	struct autofs_packet_hdr hdr;

    65         autofs_wqt_t wait_queue_token;

    66 	int len;

    67 	char name[NAME_MAX+1];

    68 };	

    69 

    70 /* v3 expire (via ioctl) */

    71 struct autofs_packet_expire {

    72 	struct autofs_packet_hdr hdr;

    73 	int len;

    74 	char name[NAME_MAX+1];

    75 };

    76 

    77 #define AUTOFS_IOC_READY      _IO(0x93,0x60)

    78 #define AUTOFS_IOC_FAIL       _IO(0x93,0x61)

    79 #define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)

    80 #define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)

    81 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)

    82 #define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)

    83 

    84 #endif /* _LINUX_AUTO_FS_H */