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