// SPDX-License-Identifier: GPL-2.0 /* * linux / fs / lockd / xdr4 . c * * XDR support for lockd and the lock client . * * Copyright ( C ) 1995 , 1996 Olaf Kirch < okir @ monad . swb . de > * Copyright ( C ) 1999 , Trond Myklebust < trond . myklebust @ fys . uio . no > #include <linux/types.h>#include <linux/sched.h>#include <linux/nfs.h>#include <linux/sunrpc/xdr.h>#include <linux/sunrpc/clnt.h>#include <linux/sunrpc/svc.h>#include <linux/sunrpc/stats.h>#include <linux/lockd/lockd.h>#include "svcxdr.h" static inline s64if (offset > NLM4_OFFSET_MAX)else if (offset < -NLM4_OFFSET_MAX)else return res;void nlm4svc_set_file_lock_range(struct file_lock *fl, u64 off, u64 len)1 ;if (len == 0 || end < 0 )else /* * NLM file handles are defined by specification to be a variable - length * XDR opaque no longer than 1024 bytes . However , this implementation * limits their length to the size of an NFSv3 file handle . static bool struct xdr_stream *xdr, struct nfs_fh *fh)if (xdr_stream_decode_u32(xdr, &len) < 0 )return false ;if (len > NFS_MAXFHSIZE)return false ;if (!p)return false ;0 , sizeof (fh->data) - len);return true ;static bool struct xdr_stream *xdr, struct nlm_lock *lock)struct file_lock *fl = &lock->fl;if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))return false ;if (!svcxdr_decode_fhandle(xdr, &lock->fh))return false ;if (!svcxdr_decode_owner(xdr, &lock->oh))return false ;if (xdr_stream_decode_u32(xdr, &lock->svid) < 0 )return false ;if (xdr_stream_decode_u64(xdr, &lock->lock_start) < 0 )return false ;if (xdr_stream_decode_u64(xdr, &lock->lock_len) < 0 )return false ;return true ;static bool struct xdr_stream *xdr, const struct nlm_lock *lock)const struct file_lock *fl = &lock->fl;/* exclusive */ if (xdr_stream_encode_bool(xdr, fl->c.flc_type != F_RDLCK) < 0 )return false ;if (xdr_stream_encode_u32(xdr, lock->svid) < 0 )return false ;if (!svcxdr_encode_owner(xdr, &lock->oh))return false ;if (fl->fl_end == OFFSET_MAX)0 ;else 1 );if (xdr_stream_encode_u64(xdr, start) < 0 )return false ;if (xdr_stream_encode_u64(xdr, len) < 0 )return false ;return true ;static bool struct xdr_stream *xdr, const struct nlm_res *resp)if (!svcxdr_encode_stats(xdr, resp->status))return false ;switch (resp->status) {case nlm_lck_denied:if (!svcxdr_encode_holder(xdr, &resp->lock))return false ;return true ;/* * Decode Call arguments bool struct svc_rqst *rqstp, struct xdr_stream *xdr)return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;if (!svcxdr_decode_cookie(xdr, &argp->cookie))return false ;if (xdr_stream_decode_bool(xdr, &exclusive) < 0 )return false ;if (!svcxdr_decode_lock(xdr, &argp->lock))return false ;if (exclusive)return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;if (!svcxdr_decode_cookie(xdr, &argp->cookie))return false ;if (xdr_stream_decode_bool(xdr, &argp->block) < 0 )return false ;if (xdr_stream_decode_bool(xdr, &exclusive) < 0 )return false ;if (!svcxdr_decode_lock(xdr, &argp->lock))return false ;if (exclusive)if (xdr_stream_decode_bool(xdr, &argp->reclaim) < 0 )return false ;if (xdr_stream_decode_u32(xdr, &argp->state) < 0 )return false ;1 ; /* monitor client by default */ return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;if (!svcxdr_decode_cookie(xdr, &argp->cookie))return false ;if (xdr_stream_decode_bool(xdr, &argp->block) < 0 )return false ;if (xdr_stream_decode_bool(xdr, &exclusive) < 0 )return false ;if (!svcxdr_decode_lock(xdr, &argp->lock))return false ;if (exclusive)return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;if (!svcxdr_decode_cookie(xdr, &argp->cookie))return false ;if (!svcxdr_decode_lock(xdr, &argp->lock))return false ;return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_res *resp = rqstp->rq_argp;if (!svcxdr_decode_cookie(xdr, &resp->cookie))return false ;if (!svcxdr_decode_stats(xdr, &resp->status))return false ;return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_reboot *argp = rqstp->rq_argp;if (xdr_stream_decode_u32(xdr, &len) < 0 )return false ;if (len > SM_MAXSTRLEN)return false ;if (!p)return false ;char *)p;if (xdr_stream_decode_u32(xdr, &argp->state) < 0 )return false ;if (!p)return false ;sizeof (argp->priv.data));return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;struct nlm_lock *lock = &argp->lock;0 ;if (!svcxdr_decode_cookie(xdr, &argp->cookie))return false ;if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))return false ;if (!svcxdr_decode_fhandle(xdr, &lock->fh))return false ;if (!svcxdr_decode_owner(xdr, &lock->oh))return false ;/* XXX: Range checks are missing in the original code */ if (xdr_stream_decode_u32(xdr, &argp->fsm_mode) < 0 )return false ;if (xdr_stream_decode_u32(xdr, &argp->fsm_access) < 0 )return false ;return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_args *argp = rqstp->rq_argp;struct nlm_lock *lock = &argp->lock;if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))return false ;if (xdr_stream_decode_u32(xdr, &argp->state) < 0 )return false ;return true ;/* * Encode Reply results bool struct svc_rqst *rqstp, struct xdr_stream *xdr)return true ;bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_res *resp = rqstp->rq_resp;return svcxdr_encode_cookie(xdr, &resp->cookie) &&bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_res *resp = rqstp->rq_resp;return svcxdr_encode_cookie(xdr, &resp->cookie) &&bool struct svc_rqst *rqstp, struct xdr_stream *xdr)struct nlm_res *resp = rqstp->rq_resp;if (!svcxdr_encode_cookie(xdr, &resp->cookie))return false ;if (!svcxdr_encode_stats(xdr, resp->status))return false ;/* sequence */ if (xdr_stream_encode_u32(xdr, 0 ) < 0 )return false ;return true ;
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