1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * XDR types for the NLM protocol 4 * 5 * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #ifndef _LOCKD_XDR_H 9 #define _LOCKD_XDR_H 10 11 #include <linux/fs.h> 12 #include <linux/filelock.h> 13 #include <linux/nfs.h> 14 #include <linux/sunrpc/xdr.h> 15 16 #define SM_MAXSTRLEN 1024 17 #define SM_PRIV_SIZE 16 18 19 struct nsm_private { 20 unsigned char data[SM_PRIV_SIZE]; 21 }; 22 23 struct svc_rqst; 24 25 #define NLM_MAXCOOKIELEN 32 26 #define NLM_MAXSTRLEN 1024 27 28 #define nlm_granted cpu_to_be32(NLM_LCK_GRANTED) 29 #define nlm_lck_denied cpu_to_be32(NLM_LCK_DENIED) 30 #define nlm_lck_denied_nolocks cpu_to_be32(NLM_LCK_DENIED_NOLOCKS) 31 #define nlm_lck_blocked cpu_to_be32(NLM_LCK_BLOCKED) 32 #define nlm_lck_denied_grace_period cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD) 33 34 /* Lock info passed via NLM */ 35 struct nlm_lock { 36 char * caller; 37 unsigned int len; /* length of "caller" */ 38 struct nfs_fh fh; 39 struct xdr_netobj oh; 40 u32 svid; 41 u64 lock_start; 42 u64 lock_len; 43 struct file_lock fl; 44 }; 45 46 /* 47 * NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes. 48 * FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to 49 * 32 bytes. 50 */ 51 52 struct nlm_cookie 53 { 54 unsigned char data[NLM_MAXCOOKIELEN]; 55 unsigned int len; 56 }; 57 58 /* 59 * Generic lockd arguments for all but sm_notify 60 */ 61 struct nlm_args { 62 struct nlm_cookie cookie; 63 struct nlm_lock lock; 64 u32 block; 65 u32 reclaim; 66 u32 state; 67 u32 monitor; 68 u32 fsm_access; 69 u32 fsm_mode; 70 }; 71 72 /* 73 * Generic lockd result 74 */ 75 struct nlm_res { 76 struct nlm_cookie cookie; 77 __be32 status; 78 struct nlm_lock lock; 79 }; 80 81 /* 82 * statd callback when client has rebooted 83 */ 84 struct nlm_reboot { 85 char *mon; 86 unsigned int len; 87 u32 state; 88 struct nsm_private priv; 89 }; 90 91 bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 92 bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 93 bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 94 bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 95 bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 96 bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 97 bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr); 98 bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr); 99 bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr); 100 101 bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 102 bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr); 103 bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr); 104 bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr); 105 106 #endif /* _LOCKD_XDR_H */ 107