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 typedef struct nlm_args nlm_args; 77 78 /* 79 * Generic lockd result 80 */ 81 struct nlm_res { 82 struct nlm_cookie cookie; 83 __be32 status; 84 struct nlm_lock lock; 85 }; 86 87 /* 88 * statd callback when client has rebooted 89 */ 90 struct nlm_reboot { 91 char *mon; 92 unsigned int len; 93 u32 state; 94 struct nsm_private priv; 95 }; 96 97 /* 98 * Contents of statd callback when monitored host rebooted 99 */ 100 #define NLMSVC_XDRSIZE sizeof(struct nlm_args) 101 102 bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 103 bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 104 bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 105 bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 106 bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 107 bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 108 bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr); 109 bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 110 bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr); 111 112 bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 113 bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 114 bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 115 bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 116 117 #endif /* LOCKD_XDR_H */ 118