607ca46e97
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
164 lines
4 KiB
C
164 lines
4 KiB
C
/* -*- c -*-
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* linux/include/linux/auto_fs4.h
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*
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* Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
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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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#ifndef _LINUX_AUTO_FS4_H
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#define _LINUX_AUTO_FS4_H
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/* Include common v3 definitions */
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#include <linux/types.h>
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#include <linux/auto_fs.h>
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/* autofs v4 definitions */
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#undef AUTOFS_PROTO_VERSION
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#undef AUTOFS_MIN_PROTO_VERSION
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#undef AUTOFS_MAX_PROTO_VERSION
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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 2
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/* Mask for expire behaviour */
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#define AUTOFS_EXP_IMMEDIATE 1
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#define AUTOFS_EXP_LEAVES 2
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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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return;
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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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return;
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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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return;
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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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return;
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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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#define AUTOFS_IOC_EXPIRE_MULTI _IOW(0x93,0x66,int)
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#define AUTOFS_IOC_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI
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#define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI
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#define AUTOFS_IOC_PROTOSUBVER _IOR(0x93,0x67,int)
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#define AUTOFS_IOC_ASKUMOUNT _IOR(0x93,0x70,int)
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#endif /* _LINUX_AUTO_FS4_H */
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