[mirror_ubuntu-bionic-kernel.git] / 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 <uapi/linux/nfs.h>

/*
 * This is the kernel NFS client file handle representation
 */
#define NFS_MAXFHSIZE		128
struct nfs_fh {
	unsigned short		size;
	unsigned char		data[NFS_MAXFHSIZE];
};

/*
 * 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)
{
	return a->size != b->size || memcmp(a->data, b->data, a->size) != 0;
}

static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source)
{
	target->size = source->size;
	memcpy(target->data, source->data, source->size);
}


/*
 * This is really a general kernel constant, but since nothing like
 * this is defined in the kernel headers, I have to do it here.
 */
#define NFS_OFFSET_MAX		((__s64)((~(__u64)0) >> 1))


enum nfs3_stable_how {
	NFS_UNSTABLE = 0,
	NFS_DATA_SYNC = 1,
	NFS_FILE_SYNC = 2,

	/* used by direct.c to mark verf as invalid */
	NFS_INVALID_STABLE_HOW = -1
};
#endif /* _LINUX_NFS_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	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
997b7af2 DW	11	#include <linux/sunrpc/msg_prot.h>
997b7af2 DW	12	#include <linux/string.h>
607ca46e	13	#include <uapi/linux/nfs.h>
997b7af2	14
1da177e4 LT	15	/*
	16	* This is the kernel NFS client file handle representation
	17	*/
	18	#define NFS_MAXFHSIZE 128
	19	struct 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	*/
	28	static 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
	33	static 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
	39
	40	/*
	41	* This is really a general kernel constant, but since nothing like
	42	* this is defined in the kernel headers, I have to do it here.
	43	*/
	44	#define NFS_OFFSET_MAX ((__s64)((~(__u64)0) >> 1))
	45
	46
	47	enum nfs3_stable_how {
	48	NFS_UNSTABLE = 0,
	49	NFS_DATA_SYNC = 1,
5002c586 WAA	50	NFS_FILE_SYNC = 2,
	51
	52	/* used by direct.c to mark verf as invalid */
	53	NFS_INVALID_STABLE_HOW = -1
1da177e4	54	};
1da177e4	55	#endif /* _LINUX_NFS_H */