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/filelock.h>
  15 #include <linux/nfs.h>
  16 #include <linux/sunrpc/xdr.h>
  17
  18 #define SM_MAXSTRLEN            1024
  19 #define SM_PRIV_SIZE            16
  20
  21 struct nsm_private {
  22         unsigned char           data[SM_PRIV_SIZE];
  23 };
  24
  25 struct svc_rqst;
  26
  27 #define NLM_MAXCOOKIELEN        32
  28 #define NLM_MAXSTRLEN           1024
  29
  30 #define nlm_granted             cpu_to_be32(NLM_LCK_GRANTED)
  31 #define nlm_lck_denied          cpu_to_be32(NLM_LCK_DENIED)
  32 #define nlm_lck_denied_nolocks  cpu_to_be32(NLM_LCK_DENIED_NOLOCKS)
  33 #define nlm_lck_blocked         cpu_to_be32(NLM_LCK_BLOCKED)
  34 #define nlm_lck_denied_grace_period     cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD)
  35
  36 #define nlm_drop_reply          cpu_to_be32(30000)
  37
  38 /* Lock info passed via NLM */
  39 struct nlm_lock {
  40         char *                  caller;
  41         unsigned int            len;    /* length of "caller" */
  42         struct nfs_fh           fh;
  43         struct xdr_netobj       oh;
  44         u32                     svid;
  45         u64                     lock_start;
  46         u64                     lock_len;
  47         struct file_lock        fl;
  48 };
  49
  50 /*
  51  *      NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
  52  *      FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
  53  *      32 bytes.
  54  */
  55
  56 struct nlm_cookie
  57 {
  58         unsigned char data[NLM_MAXCOOKIELEN];
  59         unsigned int len;
  60 };
  61
  62 /*
  63  * Generic lockd arguments for all but sm_notify
  64  */
  65 struct nlm_args {
  66         struct nlm_cookie       cookie;
  67         struct nlm_lock         lock;
  68         u32                     block;
  69         u32                     reclaim;
  70         u32                     state;
  71         u32                     monitor;
  72         u32                     fsm_access;
  73         u32                     fsm_mode;
  74 };
  75
  76 /*
  77  * Generic lockd result
  78  */
  79 struct nlm_res {
  80         struct nlm_cookie       cookie;
  81         __be32                  status;
  82         struct nlm_lock         lock;
  83 };
  84
  85 /*
  86  * statd callback when client has rebooted
  87  */
  88 struct nlm_reboot {
  89         char                    *mon;
  90         unsigned int            len;
  91         u32                     state;
  92         struct nsm_private      priv;
  93 };
  94
  95 /*
  96  * Contents of statd callback when monitored host rebooted
  97  */
  98 #define NLMSVC_XDRSIZE          sizeof(struct nlm_args)
  99
 100 bool    nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 101 bool    nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 102 bool    nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 103 bool    nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 104 bool    nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 105 bool    nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 106 bool    nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 107 bool    nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 108 bool    nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 109
 110 bool    nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 111 bool    nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 112 bool    nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 113 bool    nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
 114
 115 #endif /* LOCKD_XDR_H */