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03a39a1708
There is only one place in the unpatched sources where B_DIRECT is set in the NFS client and this code is never executed. As such, this patch removes this code that is never executed, since B_DIRECT should never be set. During a IETF testing event this week, I saw a crash in ncl_doio_directwrite(), but this function is only called if B_DIRECT is set. I cannot explain how ncl_doio_directwrite() got called, but once this patch was applied to the sources, the crash did not recur. This is not surprising, since this patch deleted the function. Reviewed by: kib, markj MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D44980
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NFSCLIENT_NFS_H_
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#define _NFSCLIENT_NFS_H_
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#if defined(_KERNEL)
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#ifndef NFS_TPRINTF_INITIAL_DELAY
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#define NFS_TPRINTF_INITIAL_DELAY 12
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#endif
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#ifndef NFS_TPRINTF_DELAY
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#define NFS_TPRINTF_DELAY 30
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#endif
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/*
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* Nfs version macros.
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*/
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#define NFS_ISV3(v) \
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(VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
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#define NFS_ISV4(v) \
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(VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV4)
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#define NFS_ISV34(v) \
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(VFSTONFS((v)->v_mount)->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4))
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#ifdef NFS_DEBUG
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extern int nfs_debug;
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#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
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#define NFS_DEBUG_WG 2 /* server write gathering */
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#define NFS_DEBUG_RC 4 /* server request caching */
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#define NFS_DPF(cat, args) \
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do { \
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if (nfs_debug & NFS_DEBUG_##cat) printf args; \
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} while (0)
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#else
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#define NFS_DPF(cat, args)
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#endif
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/*
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* NFS iod threads can be in one of these three states once spawned.
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* NFSIOD_NOT_AVAILABLE - Cannot be assigned an I/O operation at this time.
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* NFSIOD_AVAILABLE - Available to be assigned an I/O operation.
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* NFSIOD_CREATED_FOR_NFS_ASYNCIO - Newly created for nfs_asyncio() and
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* will be used by the thread that called nfs_asyncio().
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*/
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enum nfsiod_state {
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NFSIOD_NOT_AVAILABLE = 0,
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NFSIOD_AVAILABLE = 1,
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NFSIOD_CREATED_FOR_NFS_ASYNCIO = 2,
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};
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/*
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* Function prototypes.
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*/
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int ncl_meta_setsize(struct vnode *, struct thread *, u_quad_t);
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int ncl_bioread(struct vnode *, struct uio *, int, struct ucred *);
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int ncl_biowrite(struct vnode *, struct uio *, int, struct ucred *);
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int ncl_vinvalbuf(struct vnode *, int, struct thread *, int);
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int ncl_asyncio(struct nfsmount *, struct buf *, struct ucred *,
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struct thread *);
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int ncl_doio(struct vnode *, struct buf *, struct ucred *, struct thread *,
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int);
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void ncl_nhinit(void);
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void ncl_nhuninit(void);
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void ncl_nodelock(struct nfsnode *);
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void ncl_nodeunlock(struct nfsnode *);
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int ncl_getattrcache(struct vnode *, struct vattr *);
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int ncl_readrpc(struct vnode *, struct uio *, struct ucred *);
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int ncl_writerpc(struct vnode *, struct uio *, struct ucred *, int *, int *,
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int, int);
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int ncl_readlinkrpc(struct vnode *, struct uio *, struct ucred *);
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int ncl_readdirrpc(struct vnode *, struct uio *, struct ucred *,
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struct thread *);
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int ncl_readdirplusrpc(struct vnode *, struct uio *, struct ucred *,
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struct thread *);
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int ncl_commit(struct vnode *, u_quad_t, int, struct ucred *, struct thread *);
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void ncl_clearcommit(struct mount *);
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int ncl_fsinfo(struct nfsmount *, struct vnode *, struct ucred *,
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struct thread *);
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int ncl_init(struct vfsconf *);
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int ncl_uninit(struct vfsconf *);
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void ncl_nfsiodnew(void);
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void ncl_nfsiodnew_tq(__unused void *, int);
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#endif /* _KERNEL */
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#endif /* _NFSCLIENT_NFS_H_ */
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