linux/include/linux/nfs.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * NFS protocol definitions
 *
 * This file contains constants mostly for Version 2 of the protocol,
 * but also has a couple of NFSv3 bits in (notably the error codes).
 */
#ifndef _LINUX_NFS_H
#define _LINUX_NFS_H

#include <linux/sunrpc/msg_prot.h>
#include <linux/string.h>
#include <linux/crc32.h>
#include <uapi/linux/nfs.h>

/*
 * This is the kernel NFS client file handle representation
 */
#define NFS_MAXFHSIZE …
struct nfs_fh { … };

/*
 * Returns a zero iff the size and data fields match.
 * Checks only "size" bytes in the data field.
 */
static inline int nfs_compare_fh(const struct nfs_fh *a, const struct nfs_fh *b)
{ … }

static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source)
{ … }

enum nfs3_stable_how { … };

#ifdef CONFIG_CRC32
/**
 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
 * @fh - pointer to filehandle
 *
 * returns a crc32 hash for the filehandle that is compatible with
 * the one displayed by "wireshark".
 */
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{ … }
#else /* CONFIG_CRC32 */
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
{
	return 0;
}
#endif /* CONFIG_CRC32 */
#endif /* _LINUX_NFS_H */