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 bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 100 bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 101 bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 102 bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 103 bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 104 bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 105 bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr); 106 bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 107 bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr); 108 109 bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 110 bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 111 bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 112 bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 113 114 #endif /* LOCKD_XDR_H */ 115