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name : nfs3.h
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * NFSv3 protocol definitions
 */
#ifndef _UAPI_LINUX_NFS3_H
#define _UAPI_LINUX_NFS3_H

#define NFS3_PORT		2049
#define NFS3_MAXDATA		32768
#define NFS3_MAXPATHLEN		PATH_MAX
#define NFS3_MAXNAMLEN		NAME_MAX
#define NFS3_MAXGROUPS		16
#define NFS3_FHSIZE		64
#define NFS3_COOKIESIZE		4
#define NFS3_CREATEVERFSIZE	8
#define NFS3_COOKIEVERFSIZE	8
#define NFS3_WRITEVERFSIZE	8
#define NFS3_FIFO_DEV		(-1)
#define NFS3MODE_FMT		0170000
#define NFS3MODE_DIR		0040000
#define NFS3MODE_CHR		0020000
#define NFS3MODE_BLK		0060000
#define NFS3MODE_REG		0100000
#define NFS3MODE_LNK		0120000
#define NFS3MODE_SOCK		0140000
#define NFS3MODE_FIFO		0010000

/* Flags for access() call */
#define NFS3_ACCESS_READ	0x0001
#define NFS3_ACCESS_LOOKUP	0x0002
#define NFS3_ACCESS_MODIFY	0x0004
#define NFS3_ACCESS_EXTEND	0x0008
#define NFS3_ACCESS_DELETE	0x0010
#define NFS3_ACCESS_EXECUTE	0x0020
#define NFS3_ACCESS_FULL	0x003f

/* Flags for create mode */
enum nfs3_createmode {
	NFS3_CREATE_UNCHECKED = 0,
	NFS3_CREATE_GUARDED = 1,
	NFS3_CREATE_EXCLUSIVE = 2
};

/* NFSv3 file system properties */
#define NFS3_FSF_LINK		0x0001
#define NFS3_FSF_SYMLINK	0x0002
#define NFS3_FSF_HOMOGENEOUS	0x0008
#define NFS3_FSF_CANSETTIME	0x0010
/* Some shorthands. See fs/nfsd/nfs3proc.c */
#define NFS3_FSF_DEFAULT	0x001B
#define NFS3_FSF_BILLYBOY	0x0018
#define NFS3_FSF_READONLY	0x0008

enum nfs3_ftype {
	NF3NON  = 0,
	NF3REG  = 1,
	NF3DIR  = 2,
	NF3BLK  = 3,
	NF3CHR  = 4,
	NF3LNK  = 5,
	NF3SOCK = 6,
	NF3FIFO = 7,	/* changed from NFSv2 (was 8) */
	NF3BAD  = 8
};

enum nfs3_time_how {
	DONT_CHANGE		= 0,
	SET_TO_SERVER_TIME	= 1,
	SET_TO_CLIENT_TIME	= 2,
};

struct nfs3_fh {
	unsigned short size;
	unsigned char  data[NFS3_FHSIZE];
};

#define NFS3_VERSION		3
#define NFS3PROC_NULL		0
#define NFS3PROC_GETATTR	1
#define NFS3PROC_SETATTR	2
#define NFS3PROC_LOOKUP		3
#define NFS3PROC_ACCESS		4
#define NFS3PROC_READLINK	5
#define NFS3PROC_READ		6
#define NFS3PROC_WRITE		7
#define NFS3PROC_CREATE		8
#define NFS3PROC_MKDIR		9
#define NFS3PROC_SYMLINK	10
#define NFS3PROC_MKNOD		11
#define NFS3PROC_REMOVE		12
#define NFS3PROC_RMDIR		13
#define NFS3PROC_RENAME		14
#define NFS3PROC_LINK		15
#define NFS3PROC_READDIR	16
#define NFS3PROC_READDIRPLUS	17
#define NFS3PROC_FSSTAT		18
#define NFS3PROC_FSINFO		19
#define NFS3PROC_PATHCONF	20
#define NFS3PROC_COMMIT		21

#define NFS_MNT3_VERSION	3
 

#endif /* _UAPI_LINUX_NFS3_H */
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