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/*
 * linux/include/linux/lockd/xdr.h
 *
 * XDR types for the NLM protocol
 *
 * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef LOCKD_XDR_H
#define LOCKD_XDR_H

#include <linux/fs.h>
#include <linux/nfs.h>
#include <linux/sunrpc/xdr.h>

#define NLM_MAXSTRLEN           1024

#define QUADLEN(len)            (((len) + 3) >> 2)

#define nlm_granted             __constant_htonl(NLM_LCK_GRANTED)
#define nlm_lck_denied          __constant_htonl(NLM_LCK_DENIED)
#define nlm_lck_denied_nolocks  __constant_htonl(NLM_LCK_DENIED_NOLOCKS)
#define nlm_lck_blocked         __constant_htonl(NLM_LCK_BLOCKED)
#define nlm_lck_denied_grace_period     __constant_htonl(NLM_LCK_DENIED_GRACE_PERIOD)

/* Lock info passed via NLM */
struct nlm_lock {
        char *                  caller;
        int                     len;    /* length of "caller" */
        struct nfs_fh           fh;
        struct xdr_netobj       oh;
        struct file_lock        fl;
};

/*
 *      NLM cookies. Technically they can be 1K, Nobody uses over 8 bytes
 *      however.
 */
 
struct nlm_cookie
{
        unsigned char data[8];
        unsigned int len;
};

/*
 * Generic lockd arguments for all but sm_notify
 */
struct nlm_args {
        struct nlm_cookie       cookie;
        struct nlm_lock         lock;
        u32                     block;
        u32                     reclaim;
        u32                     state;
        u32                     monitor;
        u32                     fsm_access;
        u32                     fsm_mode;
};

typedef struct nlm_args nlm_args;

/*
 * Generic lockd result
 */
struct nlm_res {
        struct nlm_cookie       cookie;
        u32                     status;
        struct nlm_lock         lock;
};

/*
 * statd callback when client has rebooted
 */
struct nlm_reboot {
        char *          mon;
        int             len;
        u32             state;
        u32             addr;
        u32             vers;
        u32             proto;
};

/*
 * Contents of statd callback when monitored host rebooted
 */
#define NLMSVC_XDRSIZE          sizeof(struct nlm_args)

int     nlmsvc_decode_testargs(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_encode_testres(struct svc_rqst *, u32 *, struct nlm_res *);
int     nlmsvc_decode_lockargs(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_decode_cancargs(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_decode_unlockargs(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_encode_res(struct svc_rqst *, u32 *, struct nlm_res *);
int     nlmsvc_decode_res(struct svc_rqst *, u32 *, struct nlm_res *);
int     nlmsvc_encode_void(struct svc_rqst *, u32 *, void *);
int     nlmsvc_decode_void(struct svc_rqst *, u32 *, void *);
int     nlmsvc_decode_shareargs(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_encode_shareres(struct svc_rqst *, u32 *, struct nlm_res *);
int     nlmsvc_decode_notify(struct svc_rqst *, u32 *, struct nlm_args *);
int     nlmsvc_decode_reboot(struct svc_rqst *, u32 *, struct nlm_reboot *);
/*
int     nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
int     nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
int     nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
int     nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 */

#endif /* LOCKD_XDR_H */