cregit-Linux how code gets into the kernel

Release 4.7 include/uapi/linux/nfsd/export.h

/*
 * include/linux/nfsd/export.h
 * 
 * Public declarations for NFS exports. The definitions for the
 * syscall interface are in nfsctl.h
 *
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef _UAPINFSD_EXPORT_H

#define _UAPINFSD_EXPORT_H

# include <linux/types.h>

/*
 * Important limits for the exports stuff.
 */

#define NFSCLNT_IDMAX		1024

#define NFSCLNT_ADDRMAX		16

#define NFSCLNT_KEYMAX		32

/*
 * Export flags.
 *
 * Please update the expflags[] array in fs/nfsd/export.c when adding
 * a new flag.
 */

#define NFSEXP_READONLY		0x0001

#define NFSEXP_INSECURE_PORT	0x0002

#define NFSEXP_ROOTSQUASH	0x0004

#define NFSEXP_ALLSQUASH	0x0008

#define NFSEXP_ASYNC		0x0010

#define NFSEXP_GATHERED_WRITES	0x0020

#define NFSEXP_NOREADDIRPLUS    0x0040
/* 80 100 currently unused */

#define NFSEXP_NOHIDE		0x0200

#define NFSEXP_NOSUBTREECHECK	0x0400

#define	NFSEXP_NOAUTHNLM	0x0800		
/* Don't authenticate NLM requests - just trust */

#define NFSEXP_MSNFS		0x1000	
/* do silly things that MS clients expect; no longer supported */

#define NFSEXP_FSID		0x2000

#define	NFSEXP_CROSSMOUNT	0x4000

#define	NFSEXP_NOACL		0x8000	
/* reserved for possible ACL related use */
/*
 * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
 * clients, and only to the single directory that is the root of the
 * export; further lookup and readdir operations are treated as if every
 * subdirectory was a mountpoint, and ignored if they are not themselves
 * exported.  This is used by nfsd and mountd to construct the NFSv4
 * pseudofilesystem, which provides access only to paths leading to each
 * exported filesystem.
 */

#define	NFSEXP_V4ROOT		0x10000

#define NFSEXP_PNFS		0x20000

/* All flags that we claim to support.  (Note we don't support NOACL.) */

#define NFSEXP_ALLFLAGS		0x3FE7F

/* The flags that may vary depending on security flavor: */

#define NFSEXP_SECINFO_FLAGS	(NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
                                        | NFSEXP_ALLSQUASH \
                                        | NFSEXP_INSECURE_PORT)


#endif /* _UAPINFSD_EXPORT_H */

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