232 lines
6.3 KiB
C
232 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Copyright 1997 Transmeta Corporation - All Rights Reserved
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* Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
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* Copyright 2005-2006,2013,2017-2018 Ian Kent <raven@themaw.net>
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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 _UAPI_LINUX_AUTO_FS_H
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#define _UAPI_LINUX_AUTO_FS_H
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#include <linux/types.h>
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#include <linux/limits.h>
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#ifndef __KERNEL__
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#include <sys/ioctl.h>
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#endif /* __KERNEL__ */
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#define AUTOFS_PROTO_VERSION 5
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#define AUTOFS_MIN_PROTO_VERSION 3
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#define AUTOFS_MAX_PROTO_VERSION 5
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#define AUTOFS_PROTO_SUBVERSION 5
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/*
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* The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
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* back to the kernel via ioctl from userspace. On architectures where 32- and
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* 64-bit userspace binaries can be executed it's important that the size of
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* autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
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* do not break the binary ABI interface by changing the structure size.
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*/
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#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
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typedef unsigned long autofs_wqt_t;
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#else
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typedef unsigned int 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_IOCTL 0x93
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enum {
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AUTOFS_IOC_READY_CMD = 0x60,
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AUTOFS_IOC_FAIL_CMD,
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AUTOFS_IOC_CATATONIC_CMD,
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AUTOFS_IOC_PROTOVER_CMD,
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AUTOFS_IOC_SETTIMEOUT_CMD,
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AUTOFS_IOC_EXPIRE_CMD,
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};
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#define AUTOFS_IOC_READY _IO(AUTOFS_IOCTL, AUTOFS_IOC_READY_CMD)
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#define AUTOFS_IOC_FAIL _IO(AUTOFS_IOCTL, AUTOFS_IOC_FAIL_CMD)
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#define AUTOFS_IOC_CATATONIC _IO(AUTOFS_IOCTL, AUTOFS_IOC_CATATONIC_CMD)
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#define AUTOFS_IOC_PROTOVER _IOR(AUTOFS_IOCTL, \
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AUTOFS_IOC_PROTOVER_CMD, int)
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#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(AUTOFS_IOCTL, \
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AUTOFS_IOC_SETTIMEOUT_CMD, \
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compat_ulong_t)
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#define AUTOFS_IOC_SETTIMEOUT _IOWR(AUTOFS_IOCTL, \
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AUTOFS_IOC_SETTIMEOUT_CMD, \
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unsigned long)
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#define AUTOFS_IOC_EXPIRE _IOR(AUTOFS_IOCTL, \
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AUTOFS_IOC_EXPIRE_CMD, \
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struct autofs_packet_expire)
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/* autofs version 4 and later definitions */
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/* Mask for expire behaviour */
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#define AUTOFS_EXP_NORMAL 0x00
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#define AUTOFS_EXP_IMMEDIATE 0x01
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#define AUTOFS_EXP_LEAVES 0x02
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#define AUTOFS_EXP_FORCED 0x04
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#define AUTOFS_TYPE_ANY 0U
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#define AUTOFS_TYPE_INDIRECT 1U
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#define AUTOFS_TYPE_DIRECT 2U
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#define AUTOFS_TYPE_OFFSET 4U
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static inline void set_autofs_type_indirect(unsigned int *type)
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{
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*type = AUTOFS_TYPE_INDIRECT;
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}
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static inline unsigned int autofs_type_indirect(unsigned int type)
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{
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return (type == AUTOFS_TYPE_INDIRECT);
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}
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static inline void set_autofs_type_direct(unsigned int *type)
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{
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*type = AUTOFS_TYPE_DIRECT;
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}
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static inline unsigned int autofs_type_direct(unsigned int type)
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{
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return (type == AUTOFS_TYPE_DIRECT);
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}
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static inline void set_autofs_type_offset(unsigned int *type)
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{
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*type = AUTOFS_TYPE_OFFSET;
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}
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static inline unsigned int autofs_type_offset(unsigned int type)
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{
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return (type == AUTOFS_TYPE_OFFSET);
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}
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static inline unsigned int autofs_type_trigger(unsigned int type)
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{
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return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET);
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}
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/*
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* This isn't really a type as we use it to say "no type set" to
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* indicate we want to search for "any" mount in the
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* autofs_dev_ioctl_ismountpoint() device ioctl function.
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*/
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static inline void set_autofs_type_any(unsigned int *type)
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{
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*type = AUTOFS_TYPE_ANY;
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}
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static inline unsigned int autofs_type_any(unsigned int type)
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{
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return (type == AUTOFS_TYPE_ANY);
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}
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/* Daemon notification packet types */
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enum autofs_notify {
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NFY_NONE,
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NFY_MOUNT,
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NFY_EXPIRE
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};
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/* Kernel protocol version 4 packet types */
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/* Expire entry (umount request) */
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#define autofs_ptype_expire_multi 2
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/* Kernel protocol version 5 packet types */
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/* Indirect mount missing and expire requests. */
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#define autofs_ptype_missing_indirect 3
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#define autofs_ptype_expire_indirect 4
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/* Direct mount missing and expire requests */
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#define autofs_ptype_missing_direct 5
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#define autofs_ptype_expire_direct 6
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/* v4 multi expire (via pipe) */
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struct autofs_packet_expire_multi {
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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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union autofs_packet_union {
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struct autofs_packet_hdr hdr;
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struct autofs_packet_missing missing;
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struct autofs_packet_expire expire;
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struct autofs_packet_expire_multi expire_multi;
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};
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/* autofs v5 common packet struct */
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struct autofs_v5_packet {
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struct autofs_packet_hdr hdr;
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autofs_wqt_t wait_queue_token;
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__u32 dev;
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__u64 ino;
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__u32 uid;
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__u32 gid;
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__u32 pid;
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__u32 tgid;
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__u32 len;
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char name[NAME_MAX+1];
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};
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typedef struct autofs_v5_packet autofs_packet_missing_indirect_t;
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typedef struct autofs_v5_packet autofs_packet_expire_indirect_t;
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typedef struct autofs_v5_packet autofs_packet_missing_direct_t;
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typedef struct autofs_v5_packet autofs_packet_expire_direct_t;
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union autofs_v5_packet_union {
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struct autofs_packet_hdr hdr;
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struct autofs_v5_packet v5_packet;
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autofs_packet_missing_indirect_t missing_indirect;
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autofs_packet_expire_indirect_t expire_indirect;
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autofs_packet_missing_direct_t missing_direct;
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autofs_packet_expire_direct_t expire_direct;
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};
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enum {
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AUTOFS_IOC_EXPIRE_MULTI_CMD = 0x66, /* AUTOFS_IOC_EXPIRE_CMD + 1 */
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AUTOFS_IOC_PROTOSUBVER_CMD,
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AUTOFS_IOC_ASKUMOUNT_CMD = 0x70, /* AUTOFS_DEV_IOCTL_VERSION_CMD - 1 */
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};
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#define AUTOFS_IOC_EXPIRE_MULTI _IOW(AUTOFS_IOCTL, \
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AUTOFS_IOC_EXPIRE_MULTI_CMD, int)
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#define AUTOFS_IOC_PROTOSUBVER _IOR(AUTOFS_IOCTL, \
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AUTOFS_IOC_PROTOSUBVER_CMD, int)
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#define AUTOFS_IOC_ASKUMOUNT _IOR(AUTOFS_IOCTL, \
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AUTOFS_IOC_ASKUMOUNT_CMD, int)
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#endif /* _UAPI_LINUX_AUTO_FS_H */
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