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Linux/include/linux/lockd/xdr.h

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  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 */
120 

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