include/linux/lockd/xdr.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * linux/include/linux/lockd/xdr.h
   4  *
   5  * XDR types for the NLM protocol
   6  *
   7  * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
   8  */
   9
  10 #ifndef LOCKD_XDR_H
  11 #define LOCKD_XDR_H
  12
  13 #include <linux/fs.h>
  14 #include <linux/nfs.h>
  15 #include <linux/sunrpc/xdr.h>
  16
  17 #define SM_MAXSTRLEN            1024
  18 #define SM_PRIV_SIZE            16
  19
  20 struct nsm_private {
  21         unsigned char           data[SM_PRIV_SIZE];
  22 };
  23
  24 struct svc_rqst;
  25
  26 #define NLM_MAXCOOKIELEN        32
  27 #define NLM_MAXSTRLEN           1024
  28
  29 #define nlm_granted             cpu_to_be32(NLM_LCK_GRANTED)
  30 #define nlm_lck_denied          cpu_to_be32(NLM_LCK_DENIED)
  31 #define nlm_lck_denied_nolocks  cpu_to_be32(NLM_LCK_DENIED_NOLOCKS)
  32 #define nlm_lck_blocked         cpu_to_be32(NLM_LCK_BLOCKED)
  33 #define nlm_lck_denied_grace_period     cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD)
  34
  35 #define nlm_drop_reply          cpu_to_be32(30000)
  36
  37 /* Lock info passed via NLM */
  38 struct nlm_lock {
  39         char *                  caller;
  40         unsigned int            len;    /* length of "caller" */
  41         struct nfs_fh           fh;
  42         struct xdr_netobj       oh;
  43         u32                     svid;
  44         struct file_lock        fl;
  45 };
  46
  47 /*
  48  *      NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
  49  *      FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
  50  *      32 bytes.
  51  */
  52
  53 struct nlm_cookie
  54 {
  55         unsigned char data[NLM_MAXCOOKIELEN];
  56         unsigned int len;
  57 };
  58
  59 /*
  60  * Generic lockd arguments for all but sm_notify
  61  */
  62 struct nlm_args {
  63         struct nlm_cookie       cookie;
  64         struct nlm_lock         lock;
  65         u32                     block;
  66         u32                     reclaim;
  67         u32                     state;
  68         u32                     monitor;
  69         u32                     fsm_access;
  70         u32                     fsm_mode;
  71 };
  72
  73 typedef struct nlm_args nlm_args;
  74
  75 /*
  76  * Generic lockd result
  77  */
  78 struct nlm_res {
  79         struct nlm_cookie       cookie;
  80         __be32                  status;
  81         struct nlm_lock         lock;
  82 };
  83
  84 /*
  85  * statd callback when client has rebooted
  86  */
  87 struct nlm_reboot {
  88         char                    *mon;
  89         unsigned int            len;
  90         u32                     state;
  91         struct nsm_private      priv;
  92 };
  93
  94 /*
  95  * Contents of statd callback when monitored host rebooted
  96  */
  97 #define NLMSVC_XDRSIZE          sizeof(struct nlm_args)
  98
  99 int     nlmsvc_decode_testargs(struct svc_rqst *, __be32 *);
 100 int     nlmsvc_encode_testres(struct svc_rqst *, __be32 *);
 101 int     nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *);
 102 int     nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *);
 103 int     nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *);
 104 int     nlmsvc_encode_res(struct svc_rqst *, __be32 *);
 105 int     nlmsvc_decode_res(struct svc_rqst *, __be32 *);
 106 int     nlmsvc_encode_void(struct svc_rqst *, __be32 *);
 107 int     nlmsvc_decode_void(struct svc_rqst *, __be32 *);
 108 int     nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *);
 109 int     nlmsvc_encode_shareres(struct svc_rqst *, __be32 *);
 110 int     nlmsvc_decode_notify(struct svc_rqst *, __be32 *);
 111 int     nlmsvc_decode_reboot(struct svc_rqst *, __be32 *);
 112 /*
 113 int     nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 114 int     nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 115 int     nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 116 int     nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 117  */
 118
 119 #endif /* LOCKD_XDR_H */