1 /* 2 * include/linux/nfsd/export.h 3 * 4 * Public declarations for NFS exports. The definitions for the 5 * syscall interface are in nfsctl.h 6 * 7 * Copyright (C) 1995-1997 Olaf Kirch <okir (at) monad.swb.de> 8 */ 9 10 #ifndef _UAPINFSD_EXPORT_H 11 #define _UAPINFSD_EXPORT_H 12 13 # include <linux/types.h> 14 15 /* 16 * Important limits for the exports stuff. 17 */ 18 #define NFSCLNT_IDMAX 1024 19 #define NFSCLNT_ADDRMAX 16 20 #define NFSCLNT_KEYMAX 32 21 22 /* 23 * Export flags. 24 * 25 * Please update the expflags[] array in fs/nfsd/export.c when adding 26 * a new flag. 27 */ 28 #define NFSEXP_READONLY 0x0001 29 #define NFSEXP_INSECURE_PORT 0x0002 30 #define NFSEXP_ROOTSQUASH 0x0004 31 #define NFSEXP_ALLSQUASH 0x0008 32 #define NFSEXP_ASYNC 0x0010 33 #define NFSEXP_GATHERED_WRITES 0x0020 34 #define NFSEXP_NOREADDIRPLUS 0x0040 35 /* 80 100 currently unused */ 36 #define NFSEXP_NOHIDE 0x0200 37 #define NFSEXP_NOSUBTREECHECK 0x0400 38 #define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */ 39 #define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */ 40 #define NFSEXP_FSID 0x2000 41 #define NFSEXP_CROSSMOUNT 0x4000 42 #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */ 43 /* 44 * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4 45 * clients, and only to the single directory that is the root of the 46 * export; further lookup and readdir operations are treated as if every 47 * subdirectory was a mountpoint, and ignored if they are not themselves 48 * exported. This is used by nfsd and mountd to construct the NFSv4 49 * pseudofilesystem, which provides access only to paths leading to each 50 * exported filesystem. 51 */ 52 #define NFSEXP_V4ROOT 0x10000 53 #define NFSEXP_PNFS 0x20000 54 55 /* All flags that we claim to support. (Note we don't support NOACL.) */ 56 #define NFSEXP_ALLFLAGS 0x3FE7F 57 58 /* The flags that may vary depending on security flavor: */ 59 #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ 60 | NFSEXP_ALLSQUASH \ 61 | NFSEXP_INSECURE_PORT) 62 63 64 #endif /* _UAPINFSD_EXPORT_H */ 65
