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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/*3 * include/linux/nfsd/export.h4 * 5 * Public declarations for NFS exports. The definitions for the6 * syscall interface are in nfsctl.h7 *8 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>9 */10 11#ifndef _UAPINFSD_EXPORT_H12#define _UAPINFSD_EXPORT_H13 14# include <linux/types.h>15 16/*17 * Important limits for the exports stuff.18 */19#define NFSCLNT_IDMAX 102420#define NFSCLNT_ADDRMAX 1621#define NFSCLNT_KEYMAX 3222 23/*24 * Export flags.25 *26 * Please update the expflags[] array in fs/nfsd/export.c when adding27 * a new flag.28 */29#define NFSEXP_READONLY 0x000130#define NFSEXP_INSECURE_PORT 0x000231#define NFSEXP_ROOTSQUASH 0x000432#define NFSEXP_ALLSQUASH 0x000833#define NFSEXP_ASYNC 0x001034#define NFSEXP_GATHERED_WRITES 0x002035#define NFSEXP_NOREADDIRPLUS 0x004036#define NFSEXP_SECURITY_LABEL 0x008037/* 0x100 currently unused */38#define NFSEXP_NOHIDE 0x020039#define NFSEXP_NOSUBTREECHECK 0x040040#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */41#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */42#define NFSEXP_FSID 0x200043#define NFSEXP_CROSSMOUNT 0x400044#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */45/*46 * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv447 * clients, and only to the single directory that is the root of the48 * export; further lookup and readdir operations are treated as if every49 * subdirectory was a mountpoint, and ignored if they are not themselves50 * exported. This is used by nfsd and mountd to construct the NFSv451 * pseudofilesystem, which provides access only to paths leading to each52 * exported filesystem.53 */54#define NFSEXP_V4ROOT 0x1000055#define NFSEXP_PNFS 0x2000056 57/* All flags that we claim to support. (Note we don't support NOACL.) */58#define NFSEXP_ALLFLAGS 0x3FEFF59 60/* The flags that may vary depending on security flavor: */61#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \62 | NFSEXP_ALLSQUASH \63 | NFSEXP_INSECURE_PORT)64 65/*66 * Transport layer security policies that are permitted to access67 * an export68 */69#define NFSEXP_XPRTSEC_NONE 0x000170#define NFSEXP_XPRTSEC_TLS 0x000271#define NFSEXP_XPRTSEC_MTLS 0x000472 73#define NFSEXP_XPRTSEC_NUM (3)74 75#define NFSEXP_XPRTSEC_ALL (NFSEXP_XPRTSEC_NONE | \76 NFSEXP_XPRTSEC_TLS | \77 NFSEXP_XPRTSEC_MTLS)78 79#endif /* _UAPINFSD_EXPORT_H */80