1 files changed, 157 insertions, 12 deletions

diff --git a/include/uapi/linux/auto_fs.h b/include/uapi/linux/auto_fs.h
index 2a4432c7a4b4..e13eec3dfb2f 100644
--- a/include/uapi/linux/auto_fs.h
+++ b/include/uapi/linux/auto_fs.h
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
- *   Copyright 1997 Transmeta Corporation - All Rights Reserved
+ * 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
@@ -8,7 +10,6 @@
  *
  * ----------------------------------------------------------------------- */
 
-
 #ifndef _UAPI_LINUX_AUTO_FS_H
 #define _UAPI_LINUX_AUTO_FS_H
 
@@ -18,13 +19,11 @@
 #include <sys/ioctl.h>
 #endif /* __KERNEL__ */
 
+#define AUTOFS_PROTO_VERSION            5
+#define AUTOFS_MIN_PROTO_VERSION        3
+#define AUTOFS_MAX_PROTO_VERSION        5
 
-/* This file describes autofs v3 */
-#define AUTOFS_PROTO_VERSION    3
-
-/* Range of protocol versions defined */
-#define AUTOFS_MAX_PROTO_VERSION        AUTOFS_PROTO_VERSION
-#define AUTOFS_MIN_PROTO_VERSION        AUTOFS_PROTO_VERSION
+#define AUTOFS_PROTO_SUBVERSION         2
 
 /*
  * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
@@ -76,9 +75,155 @@ enum {
 #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)
+#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_IMMEDIATE            1
+#define AUTOFS_EXP_LEAVES               2
+
+#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 /* _UAPI_LINUX_AUTO_FS_H */