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_MAXSTRLEN            1024
  17 #define SM_PRIV_SIZE            16
  18
  19 struct nsm_private {
  20         unsigned char           data[SM_PRIV_SIZE];
  21 };
  22
  23 struct svc_rqst;
  24
  25 #define NLM_MAXCOOKIELEN        32
  26 #define NLM_MAXSTRLEN           1024
  27
  28 #define nlm_granted             cpu_to_be32(NLM_LCK_GRANTED)
  29 #define nlm_lck_denied          cpu_to_be32(NLM_LCK_DENIED)
  30 #define nlm_lck_denied_nolocks  cpu_to_be32(NLM_LCK_DENIED_NOLOCKS)
  31 #define nlm_lck_blocked         cpu_to_be32(NLM_LCK_BLOCKED)
  32 #define nlm_lck_denied_grace_period     cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD)
  33
  34 #define nlm_drop_reply          cpu_to_be32(30000)
  35
  36 /* Lock info passed via NLM */
  37 struct nlm_lock {
  38         char *                  caller;
  39         unsigned int            len;    /* length of "caller" */
  40         struct nfs_fh           fh;
  41         struct xdr_netobj       oh;
  42         u32                     svid;
  43         struct file_lock        fl;
  44 };
  45
  46 /*
  47  *      NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
  48  *      FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
  49  *      32 bytes.
  50  */
  51
  52 struct nlm_cookie
  53 {
  54         unsigned char data[NLM_MAXCOOKIELEN];
  55         unsigned int len;
  56 };
  57
  58 /*
  59  * Generic lockd arguments for all but sm_notify
  60  */
  61 struct nlm_args {
  62         struct nlm_cookie       cookie;
  63         struct nlm_lock         lock;
  64         u32                     block;
  65         u32                     reclaim;
  66         u32                     state;
  67         u32                     monitor;
  68         u32                     fsm_access;
  69         u32                     fsm_mode;
  70 };
  71
  72 typedef struct nlm_args nlm_args;
  73
  74 /*
  75  * Generic lockd result
  76  */
  77 struct nlm_res {
  78         struct nlm_cookie       cookie;
  79         __be32                  status;
  80         struct nlm_lock         lock;
  81 };
  82
  83 /*
  84  * statd callback when client has rebooted
  85  */
  86 struct nlm_reboot {
  87         char                    *mon;
  88         unsigned int            len;
  89         u32                     state;
  90         struct nsm_private      priv;
  91 };
  92
  93 /*
  94  * Contents of statd callback when monitored host rebooted
  95  */
  96 #define NLMSVC_XDRSIZE          sizeof(struct nlm_args)
  97
  98 int     nlmsvc_decode_testargs(struct svc_rqst *, __be32 *, struct nlm_args *);
  99 int     nlmsvc_encode_testres(struct svc_rqst *, __be32 *, struct nlm_res *);
 100 int     nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 101 int     nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 102 int     nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 103 int     nlmsvc_encode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
 104 int     nlmsvc_decode_res(struct svc_rqst *, __be32 *, struct nlm_res *);
 105 int     nlmsvc_encode_void(struct svc_rqst *, __be32 *, void *);
 106 int     nlmsvc_decode_void(struct svc_rqst *, __be32 *, void *);
 107 int     nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *, struct nlm_args *);
 108 int     nlmsvc_encode_shareres(struct svc_rqst *, __be32 *, struct nlm_res *);
 109 int     nlmsvc_decode_notify(struct svc_rqst *, __be32 *, struct nlm_args *);
 110 int     nlmsvc_decode_reboot(struct svc_rqst *, __be32 *, struct nlm_reboot *);
 111 /*
 112 int     nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 113 int     nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 114 int     nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 115 int     nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 116  */
 117
 118 #endif /* LOCKD_XDR_H */