cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/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; }

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static inline unsigned int autofs_type_indirect(unsigned int type) { return (type == AUTOFS_TYPE_INDIRECT); }

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static inline void set_autofs_type_direct(unsigned int *type) { *type = AUTOFS_TYPE_DIRECT; }

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static inline unsigned int autofs_type_direct(unsigned int type) { return (type == AUTOFS_TYPE_DIRECT); }

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static inline void set_autofs_type_offset(unsigned int *type) { *type = AUTOFS_TYPE_OFFSET; }

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static inline unsigned int autofs_type_offset(unsigned int type) { return (type == AUTOFS_TYPE_OFFSET); }

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static inline unsigned int autofs_type_trigger(unsigned int type) { return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET); }

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/* * 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; }

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static inline unsigned int autofs_type_any(unsigned int type) { return (type == AUTOFS_TYPE_ANY); }

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/* 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_EXPIRE_INDIRECT AUTOFS_IOC_EXPIRE_MULTI #define AUTOFS_IOC_EXPIRE_DIRECT AUTOFS_IOC_EXPIRE_MULTI #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_FS4_H */

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