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