/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * 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 NFSD_EXPORT_H #define NFSD_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 #define NFSEXP_SECURITY_LABEL 0x0080 /* 0x100 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 0x3FEFF /* The flags that may vary depending on security flavor: */ #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ | NFSEXP_ALLSQUASH \ | NFSEXP_INSECURE_PORT) #endif /* NFSD_EXPORT_H */

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