1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * include/linux/nfsd/export.h 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Public declarations for NFS exports. The definitions for the 6*4882a593Smuzhiyun * syscall interface are in nfsctl.h 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _UAPINFSD_EXPORT_H 12*4882a593Smuzhiyun #define _UAPINFSD_EXPORT_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun # include <linux/types.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * Important limits for the exports stuff. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun #define NFSCLNT_IDMAX 1024 20*4882a593Smuzhiyun #define NFSCLNT_ADDRMAX 16 21*4882a593Smuzhiyun #define NFSCLNT_KEYMAX 32 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* 24*4882a593Smuzhiyun * Export flags. 25*4882a593Smuzhiyun * 26*4882a593Smuzhiyun * Please update the expflags[] array in fs/nfsd/export.c when adding 27*4882a593Smuzhiyun * a new flag. 28*4882a593Smuzhiyun */ 29*4882a593Smuzhiyun #define NFSEXP_READONLY 0x0001 30*4882a593Smuzhiyun #define NFSEXP_INSECURE_PORT 0x0002 31*4882a593Smuzhiyun #define NFSEXP_ROOTSQUASH 0x0004 32*4882a593Smuzhiyun #define NFSEXP_ALLSQUASH 0x0008 33*4882a593Smuzhiyun #define NFSEXP_ASYNC 0x0010 34*4882a593Smuzhiyun #define NFSEXP_GATHERED_WRITES 0x0020 35*4882a593Smuzhiyun #define NFSEXP_NOREADDIRPLUS 0x0040 36*4882a593Smuzhiyun #define NFSEXP_SECURITY_LABEL 0x0080 37*4882a593Smuzhiyun /* 0x100 currently unused */ 38*4882a593Smuzhiyun #define NFSEXP_NOHIDE 0x0200 39*4882a593Smuzhiyun #define NFSEXP_NOSUBTREECHECK 0x0400 40*4882a593Smuzhiyun #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */ 41*4882a593Smuzhiyun #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */ 42*4882a593Smuzhiyun #define NFSEXP_FSID 0x2000 43*4882a593Smuzhiyun #define NFSEXP_CROSSMOUNT 0x4000 44*4882a593Smuzhiyun #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */ 45*4882a593Smuzhiyun /* 46*4882a593Smuzhiyun * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4 47*4882a593Smuzhiyun * clients, and only to the single directory that is the root of the 48*4882a593Smuzhiyun * export; further lookup and readdir operations are treated as if every 49*4882a593Smuzhiyun * subdirectory was a mountpoint, and ignored if they are not themselves 50*4882a593Smuzhiyun * exported. This is used by nfsd and mountd to construct the NFSv4 51*4882a593Smuzhiyun * pseudofilesystem, which provides access only to paths leading to each 52*4882a593Smuzhiyun * exported filesystem. 53*4882a593Smuzhiyun */ 54*4882a593Smuzhiyun #define NFSEXP_V4ROOT 0x10000 55*4882a593Smuzhiyun #define NFSEXP_PNFS 0x20000 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun /* All flags that we claim to support. (Note we don't support NOACL.) */ 58*4882a593Smuzhiyun #define NFSEXP_ALLFLAGS 0x3FEFF 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun /* The flags that may vary depending on security flavor: */ 61*4882a593Smuzhiyun #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ 62*4882a593Smuzhiyun | NFSEXP_ALLSQUASH \ 63*4882a593Smuzhiyun | NFSEXP_INSECURE_PORT) 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun #endif /* _UAPINFSD_EXPORT_H */ 67