include/linux/lockd/xdr.h

   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         __be32          vers;
  85         __be32          proto;
  86 };
  87
  88 /*
  89  * Contents of statd callback when monitored host rebooted
  90  */
  91 #define NLMSVC_XDRSIZE          sizeof(struct nlm_args)
  92
  93 int     nlmsvc_decode_testargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  94 int     nlmsvc_encode_testres(struct svc_rqst *, __be32 *, struct nlm_res *);
  95 int     nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  96 int     nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  97 int     nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  98 int     nlmsvc_encode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
  99 int     nlmsvc_decode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
 100 int     nlmsvc_encode_void(struct svc_rqst *, __be32 *, void *);
 101 int     nlmsvc_decode_void(struct svc_rqst *, __be32 *, void *);
 102 int     nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 103 int     nlmsvc_encode_shareres(struct svc_rqst *, __be32 *, struct nlm_res *);
 104 int     nlmsvc_decode_notify(struct svc_rqst *, __be32 *, struct nlm_args *);
 105 int     nlmsvc_decode_reboot(struct svc_rqst *, __be32 *, struct nlm_reboot *);
 106 /*
 107 int     nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 108 int     nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 109 int     nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 110 int     nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 111  */
 112
 113 #endif /* LOCKD_XDR_H */