1 /*

     2  * linux/include/linux/lockd/xdr.h

     3  *

     4  * XDR types for the NLM protocol

     5  *

     6  * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>

     7  */

     8 

     9 #ifndef LOCKD_XDR_H

    10 #define LOCKD_XDR_H

    11 

    12 #include <linux/fs.h>

    13 #include <linux/nfs.h>

    14 #include <linux/sunrpc/xdr.h>

    15 

    16 struct svc_rqst;

    17 

    18 #define NLM_MAXCOOKIELEN    	32

    19 #define NLM_MAXSTRLEN		1024

    20 

    21 #define	nlm_granted		__constant_htonl(NLM_LCK_GRANTED)

    22 #define	nlm_lck_denied		__constant_htonl(NLM_LCK_DENIED)

    23 #define	nlm_lck_denied_nolocks	__constant_htonl(NLM_LCK_DENIED_NOLOCKS)

    24 #define	nlm_lck_blocked		__constant_htonl(NLM_LCK_BLOCKED)

    25 #define	nlm_lck_denied_grace_period	__constant_htonl(NLM_LCK_DENIED_GRACE_PERIOD)

    26 

    27 #define nlm_drop_reply		__constant_htonl(30000)

    28 

    29 /* Lock info passed via NLM */

    30 struct nlm_lock {

    31 	char *			caller;

    32 	unsigned int		len; 	/* length of "caller" */

    33 	struct nfs_fh		fh;

    34 	struct xdr_netobj	oh;

    35 	u32			svid;

    36 	struct file_lock	fl;

    37 };

    38 

    39 /*

    40  *	NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.

    41  *	FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to

    42  *	32 bytes.

    43  */

    44  

    45 struct nlm_cookie

    46 {

    47 	unsigned char data[NLM_MAXCOOKIELEN];

    48 	unsigned int len;

    49 };

    50 

    51 /*

    52  * Generic lockd arguments for all but sm_notify

    53  */

    54 struct nlm_args {

    55 	struct nlm_cookie	cookie;

    56 	struct nlm_lock		lock;

    57 	u32			block;

    58 	u32			reclaim;

    59 	u32			state;

    60 	u32			monitor;

    61 	u32			fsm_access;

    62 	u32			fsm_mode;

    63 };

    64 

    65 typedef struct nlm_args nlm_args;

    66 

    67 /*

    68  * Generic lockd result

    69  */

    70 struct nlm_res {

    71 	struct nlm_cookie	cookie;

    72 	__be32			status;

    73 	struct nlm_lock		lock;

    74 };

    75 

    76 /*

    77  * statd callback when client has rebooted

    78  */

    79 struct nlm_reboot {

    80 	char *		mon;

    81 	unsigned int	len;

    82 	u32		state;

    83 	__be32		addr;

    84 };

    85 

    86 /*

    87  * Contents of statd callback when monitored host rebooted

    88  */

    89 #define NLMSVC_XDRSIZE		sizeof(struct nlm_args)

    90 

    91 int	nlmsvc_decode_testargs(struct svc_rqst *, __be32 *, struct nlm_args *);

    92 int	nlmsvc_encode_testres(struct svc_rqst *, __be32 *, struct nlm_res *);

    93 int	nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *, struct nlm_args *);

    94 int	nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *, struct nlm_args *);

    95 int	nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *, struct nlm_args *);

    96 int	nlmsvc_encode_res(struct svc_rqst *, __be32 *, struct nlm_res *);

    97 int	nlmsvc_decode_res(struct svc_rqst *, __be32 *, struct nlm_res *);

    98 int	nlmsvc_encode_void(struct svc_rqst *, __be32 *, void *);

    99 int	nlmsvc_decode_void(struct svc_rqst *, __be32 *, void *);

   100 int	nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *, struct nlm_args *);

   101 int	nlmsvc_encode_shareres(struct svc_rqst *, __be32 *, struct nlm_res *);

   102 int	nlmsvc_decode_notify(struct svc_rqst *, __be32 *, struct nlm_args *);

   103 int	nlmsvc_decode_reboot(struct svc_rqst *, __be32 *, struct nlm_reboot *);

   104 /*

   105 int	nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);

   106 int	nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);

   107 int	nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);

   108 int	nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);

   109  */

   110 

   111 #endif /* LOCKD_XDR_H */