nfs.h (1145B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * NFS protocol definitions 4 * 5 * This file contains constants mostly for Version 2 of the protocol, 6 * but also has a couple of NFSv3 bits in (notably the error codes). 7 */ 8#ifndef _LINUX_NFS_H 9#define _LINUX_NFS_H 10 11#include <linux/sunrpc/msg_prot.h> 12#include <linux/string.h> 13#include <uapi/linux/nfs.h> 14 15/* 16 * This is the kernel NFS client file handle representation 17 */ 18#define NFS_MAXFHSIZE 128 19struct nfs_fh { 20 unsigned short size; 21 unsigned char data[NFS_MAXFHSIZE]; 22}; 23 24/* 25 * Returns a zero iff the size and data fields match. 26 * Checks only "size" bytes in the data field. 27 */ 28static inline int nfs_compare_fh(const struct nfs_fh *a, const struct nfs_fh *b) 29{ 30 return a->size != b->size || memcmp(a->data, b->data, a->size) != 0; 31} 32 33static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source) 34{ 35 target->size = source->size; 36 memcpy(target->data, source->data, source->size); 37} 38 39enum nfs3_stable_how { 40 NFS_UNSTABLE = 0, 41 NFS_DATA_SYNC = 1, 42 NFS_FILE_SYNC = 2, 43 44 /* used by direct.c to mark verf as invalid */ 45 NFS_INVALID_STABLE_HOW = -1 46}; 47#endif /* _LINUX_NFS_H */