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 #define SM_PRIV_SIZE            16
  17
  18 struct nsm_private {
  19         unsigned char           data[SM_PRIV_SIZE];
  20 };
  21
  22 struct svc_rqst;
  23
  24 #define NLM_MAXCOOKIELEN        32
  25 #define NLM_MAXSTRLEN           1024
  26
  27 #define nlm_granted             __constant_htonl(NLM_LCK_GRANTED)
  28 #define nlm_lck_denied          __constant_htonl(NLM_LCK_DENIED)
  29 #define nlm_lck_denied_nolocks  __constant_htonl(NLM_LCK_DENIED_NOLOCKS)
  30 #define nlm_lck_blocked         __constant_htonl(NLM_LCK_BLOCKED)
  31 #define nlm_lck_denied_grace_period     __constant_htonl(NLM_LCK_DENIED_GRACE_PERIOD)
  32
  33 #define nlm_drop_reply          __constant_htonl(30000)
  34
  35 /* Lock info passed via NLM */
  36 struct nlm_lock {
  37         char *                  caller;
  38         unsigned int            len;    /* length of "caller" */
  39         struct nfs_fh           fh;
  40         struct xdr_netobj       oh;
  41         u32                     svid;
  42         struct file_lock        fl;
  43 };
  44
  45 /*
  46  *      NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
  47  *      FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
  48  *      32 bytes.
  49  */
  50
  51 struct nlm_cookie
  52 {
  53         unsigned char data[NLM_MAXCOOKIELEN];
  54         unsigned int len;
  55 };
  56
  57 /*
  58  * Generic lockd arguments for all but sm_notify
  59  */
  60 struct nlm_args {
  61         struct nlm_cookie       cookie;
  62         struct nlm_lock         lock;
  63         u32                     block;
  64         u32                     reclaim;
  65         u32                     state;
  66         u32                     monitor;
  67         u32                     fsm_access;
  68         u32                     fsm_mode;
  69 };
  70
  71 typedef struct nlm_args nlm_args;
  72
  73 /*
  74  * Generic lockd result
  75  */
  76 struct nlm_res {
  77         struct nlm_cookie       cookie;
  78         __be32                  status;
  79         struct nlm_lock         lock;
  80 };
  81
  82 /*
  83  * statd callback when client has rebooted
  84  */
  85 struct nlm_reboot {
  86         char                    *mon;
  87         unsigned int            len;
  88         u32                     state;
  89         struct nsm_private      priv;
  90 };
  91
  92 /*
  93  * Contents of statd callback when monitored host rebooted
  94  */
  95 #define NLMSVC_XDRSIZE          sizeof(struct nlm_args)
  96
  97 int     nlmsvc_decode_testargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  98 int     nlmsvc_encode_testres(struct svc_rqst *, __be32 *, struct nlm_res *);
  99 int     nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 100 int     nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 101 int     nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 102 int     nlmsvc_encode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
 103 int     nlmsvc_decode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
 104 int     nlmsvc_encode_void(struct svc_rqst *, __be32 *, void *);
 105 int     nlmsvc_decode_void(struct svc_rqst *, __be32 *, void *);
 106 int     nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 107 int     nlmsvc_encode_shareres(struct svc_rqst *, __be32 *, struct nlm_res *);
 108 int     nlmsvc_decode_notify(struct svc_rqst *, __be32 *, struct nlm_args *);
 109 int     nlmsvc_decode_reboot(struct svc_rqst *, __be32 *, struct nlm_reboot *);
 110 /*
 111 int     nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 112 int     nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 113 int     nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 114 int     nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 115  */
 116
 117 #endif /* LOCKD_XDR_H */