1 files changed, 164 insertions, 0 deletions

diff --git a/include/uapi/linux/auto_fs4.h b/include/uapi/linux/auto_fs4.h
new file mode 100644
index 000000000000..e02982fa2953
--- /dev/null
+++ b/include/uapi/linux/auto_fs4.h
@@ -0,0 +1,164 @@
+/* -*- c -*-
+ * linux/include/linux/auto_fs4.h
+ *
+ * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
+ *
+ * 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_FS4_H
+#define _LINUX_AUTO_FS4_H
+
+/* Include common v3 definitions */
+#include <linux/types.h>
+#include <linux/auto_fs.h>
+
+/* autofs v4 definitions */
+#undef AUTOFS_PROTO_VERSION
+#undef AUTOFS_MIN_PROTO_VERSION
+#undef AUTOFS_MAX_PROTO_VERSION
+
+#define AUTOFS_PROTO_VERSION            5
+#define AUTOFS_MIN_PROTO_VERSION        3
+#define AUTOFS_MAX_PROTO_VERSION        5
+
+#define AUTOFS_PROTO_SUBVERSION         2
+
+/* 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;
+        return;
+}
+
+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;
+        return;
+}
+
+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;
+        return;
+}
+
+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;
+        return;
+}
+
+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;
+};
+
+#define AUTOFS_IOC_EXPIRE_MULTI         _IOW(0x93,0x66,int)
+#define AUTOFS_IOC_EXPIRE_INDIRECT      AUTOFS_IOC_EXPIRE_MULTI
+#define AUTOFS_IOC_EXPIRE_DIRECT        AUTOFS_IOC_EXPIRE_MULTI
+#define AUTOFS_IOC_PROTOSUBVER          _IOR(0x93,0x67,int)
+#define AUTOFS_IOC_ASKUMOUNT            _IOR(0x93,0x70,int)
+
+
+#endif /* _LINUX_AUTO_FS4_H */