2005-01-07 01:45:51 +00:00
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/*-
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1994-05-24 10:09:53 +00:00
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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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* 4. 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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1997-02-10 02:22:35 +00:00
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* @(#)nfs_node.c 8.6 (Berkeley) 5/22/95
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1994-05-24 10:09:53 +00:00
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*/
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2001-09-18 23:32:09 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1997-02-10 02:22:35 +00:00
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1994-05-24 10:09:53 +00:00
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#include <sys/param.h>
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#include <sys/systm.h>
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2001-05-01 08:13:21 +00:00
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#include <sys/fnv_hash.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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2009-05-22 12:35:12 +00:00
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#include <sys/mbuf.h>
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1994-05-24 10:09:53 +00:00
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#include <sys/mount.h>
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#include <sys/namei.h>
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2001-05-01 08:13:21 +00:00
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#include <sys/proc.h>
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#include <sys/socket.h>
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2001-04-11 00:39:20 +00:00
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#include <sys/sysctl.h>
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2001-05-01 08:13:21 +00:00
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#include <sys/vnode.h>
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1994-05-24 10:09:53 +00:00
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2002-03-20 10:07:52 +00:00
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#include <vm/uma.h>
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1997-12-27 02:56:39 +00:00
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1995-06-27 11:07:30 +00:00
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#include <nfs/nfsproto.h>
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2001-09-18 23:32:09 +00:00
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#include <nfsclient/nfs.h>
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#include <nfsclient/nfsnode.h>
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#include <nfsclient/nfsmount.h>
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1994-05-24 10:09:53 +00:00
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2002-03-20 10:07:52 +00:00
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static uma_zone_t nfsnode_zone;
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2002-10-20 21:40:55 +00:00
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1994-05-24 10:09:53 +00:00
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#define TRUE 1
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#define FALSE 0
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1994-05-25 09:21:21 +00:00
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void
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2001-09-18 23:32:09 +00:00
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nfs_nhinit(void)
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1994-05-24 10:09:53 +00:00
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{
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2001-09-18 23:32:09 +00:00
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2002-03-20 10:07:52 +00:00
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nfsnode_zone = uma_zcreate("NFSNODE", sizeof(struct nfsnode), NULL,
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NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
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1994-05-24 10:09:53 +00:00
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}
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2004-04-11 13:30:20 +00:00
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void
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nfs_nhuninit(void)
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{
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uma_zdestroy(nfsnode_zone);
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}
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2005-03-16 11:28:19 +00:00
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struct nfs_vncmp {
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int fhsize;
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void *fh;
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};
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static int
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nfs_vncmpf(struct vnode *vp, void *arg)
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{
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struct nfs_vncmp *a;
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struct nfsnode *np;
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a = arg;
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np = VTONFS(vp);
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return (bcmp(a->fh, np->n_fhp, a->fhsize));
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}
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1994-05-24 10:09:53 +00:00
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/*
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* Look up a vnode/nfsnode by file handle.
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* Callers must check for mount points!!
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* In all cases, a pointer to a
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* nfsnode structure is returned.
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*/
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1994-05-25 09:21:21 +00:00
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int
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2006-09-13 18:39:09 +00:00
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nfs_nget(struct mount *mntp, nfsfh_t *fhp, int fhsize, struct nfsnode **npp, int flags)
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1994-05-24 10:09:53 +00:00
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{
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2001-09-12 08:38:13 +00:00
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struct thread *td = curthread; /* XXX */
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2005-03-16 11:28:19 +00:00
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struct nfsnode *np;
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2001-09-18 23:32:09 +00:00
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struct vnode *vp;
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1994-05-24 10:09:53 +00:00
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struct vnode *nvp;
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int error;
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2005-03-16 11:28:19 +00:00
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u_int hash;
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2000-01-05 05:11:37 +00:00
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struct nfsmount *nmp;
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2005-03-16 11:28:19 +00:00
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struct nfs_vncmp ncmp;
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2000-01-05 05:11:37 +00:00
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nmp = VFSTONFS(mntp);
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2005-03-16 11:28:19 +00:00
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*npp = NULL;
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hash = fnv_32_buf(fhp->fh_bytes, fhsize, FNV1_32_INIT);
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ncmp.fhsize = fhsize;
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ncmp.fh = fhp;
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2006-09-13 18:39:09 +00:00
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error = vfs_hash_get(mntp, hash, flags,
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2005-03-16 11:28:19 +00:00
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td, &nvp, nfs_vncmpf, &ncmp);
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if (error)
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return (error);
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if (nvp != NULL) {
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*npp = VTONFS(nvp);
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return (0);
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1995-07-21 10:25:13 +00:00
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}
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1996-06-12 03:37:57 +00:00
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/*
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1998-05-24 14:41:56 +00:00
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* Allocate before getnewvnode since doing so afterward
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1996-06-12 03:37:57 +00:00
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* might cause a bogus v_data pointer to get dereferenced
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1998-05-24 14:41:56 +00:00
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* elsewhere if zalloc should block.
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1996-06-12 03:37:57 +00:00
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*/
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2005-03-16 11:28:19 +00:00
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np = uma_zalloc(nfsnode_zone, M_WAITOK | M_ZERO);
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2001-09-18 23:32:09 +00:00
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2009-05-22 12:35:12 +00:00
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error = getnewvnode("nfs", mntp, &nfs_vnodeops, &nvp);
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1994-10-02 17:27:07 +00:00
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if (error) {
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2002-03-20 10:07:52 +00:00
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uma_zfree(nfsnode_zone, np);
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1994-05-24 10:09:53 +00:00
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return (error);
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}
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vp = nvp;
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2009-05-22 12:35:12 +00:00
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vp->v_bufobj.bo_ops = &buf_ops_nfs;
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1994-05-24 10:09:53 +00:00
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vp->v_data = np;
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np->n_vnode = vp;
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2006-11-27 19:06:43 +00:00
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/*
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* Initialize the mutex even if the vnode is going to be a loser.
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* This simplifies the logic in reclaim, which can then unconditionally
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* destroy the mutex (in the case of the loser, or if hash_insert happened
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* to return an error no special casing is needed).
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*/
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mtx_init(&np->n_mtx, "NFSnode lock", NULL, MTX_DEF);
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2006-05-23 16:07:23 +00:00
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/*
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* NFS supports recursive and shared locking.
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*/
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2008-02-24 16:38:58 +00:00
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VN_LOCK_AREC(vp);
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VN_LOCK_ASHARE(vp);
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2006-11-29 02:21:40 +00:00
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if (fhsize > NFS_SMALLFH) {
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2008-10-23 15:53:51 +00:00
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np->n_fhp = malloc(fhsize, M_NFSBIGFH, M_WAITOK);
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2006-11-29 02:21:40 +00:00
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} else
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np->n_fhp = &np->n_fh;
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bcopy((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize);
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np->n_fhsize = fhsize;
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2009-09-09 20:37:49 +00:00
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lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
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2007-03-13 01:50:27 +00:00
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error = insmntque(vp, mntp);
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if (error != 0) {
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*npp = NULL;
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if (np->n_fhsize > NFS_SMALLFH) {
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2008-10-23 15:53:51 +00:00
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free((caddr_t)np->n_fhp, M_NFSBIGFH);
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2007-03-13 01:50:27 +00:00
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}
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mtx_destroy(&np->n_mtx);
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uma_zfree(nfsnode_zone, np);
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return (error);
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}
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2006-09-13 18:39:09 +00:00
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error = vfs_hash_insert(vp, hash, flags,
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2005-03-16 11:28:19 +00:00
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td, &nvp, nfs_vncmpf, &ncmp);
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if (error)
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return (error);
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if (nvp != NULL) {
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*npp = VTONFS(nvp);
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2006-11-16 23:03:46 +00:00
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/* vfs_hash_insert() vput()'s the losing vnode */
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2005-03-16 11:28:19 +00:00
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return (0);
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1999-06-05 05:26:36 +00:00
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}
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1994-05-24 10:09:53 +00:00
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*npp = np;
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1995-06-27 11:07:30 +00:00
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1994-05-24 10:09:53 +00:00
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return (0);
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}
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1994-05-25 09:21:21 +00:00
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int
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2001-09-18 23:32:09 +00:00
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nfs_inactive(struct vop_inactive_args *ap)
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1994-05-24 10:09:53 +00:00
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{
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2001-09-18 23:32:09 +00:00
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struct nfsnode *np;
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struct sillyrename *sp;
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2001-09-12 08:38:13 +00:00
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struct thread *td = curthread; /* XXX */
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1994-05-24 10:09:53 +00:00
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np = VTONFS(ap->a_vp);
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2002-09-25 02:38:43 +00:00
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if (prtactive && vrefcnt(ap->a_vp) != 0)
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1994-05-24 10:09:53 +00:00
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vprint("nfs_inactive: pushing active", ap->a_vp);
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2010-08-04 01:19:11 +00:00
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mtx_lock(&np->n_mtx);
|
1997-05-09 13:04:43 +00:00
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if (ap->a_vp->v_type != VDIR) {
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1995-06-27 11:07:30 +00:00
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sp = np->n_sillyrename;
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2002-07-11 17:54:58 +00:00
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np->n_sillyrename = NULL;
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1997-05-09 13:04:43 +00:00
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} else
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2002-07-11 17:54:58 +00:00
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sp = NULL;
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1994-05-24 10:09:53 +00:00
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if (sp) {
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2010-08-04 01:19:11 +00:00
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mtx_unlock(&np->n_mtx);
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2005-01-24 12:31:06 +00:00
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(void)nfs_vinvalbuf(ap->a_vp, 0, td, 1);
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1994-05-24 10:09:53 +00:00
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/*
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* Remove the silly file that was rename'd earlier
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*/
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2003-11-14 20:54:10 +00:00
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(sp->s_removeit)(sp);
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1994-05-24 10:09:53 +00:00
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crfree(sp->s_cred);
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vrele(sp->s_dvp);
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2008-10-23 15:53:51 +00:00
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free((caddr_t)sp, M_NFSREQ);
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2010-08-04 01:19:11 +00:00
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mtx_lock(&np->n_mtx);
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1994-05-24 10:09:53 +00:00
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}
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2004-12-06 18:52:28 +00:00
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np->n_flag &= NMODIFIED;
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2010-08-04 01:19:11 +00:00
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mtx_unlock(&np->n_mtx);
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1994-05-24 10:09:53 +00:00
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return (0);
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}
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/*
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* Reclaim an nfsnode so that it can be used for other purposes.
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*/
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1994-05-25 09:21:21 +00:00
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int
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2001-09-18 23:32:09 +00:00
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nfs_reclaim(struct vop_reclaim_args *ap)
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1994-05-24 10:09:53 +00:00
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{
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2001-09-18 23:32:09 +00:00
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struct vnode *vp = ap->a_vp;
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struct nfsnode *np = VTONFS(vp);
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struct nfsdmap *dp, *dp2;
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1994-05-24 10:09:53 +00:00
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2002-09-25 02:38:43 +00:00
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if (prtactive && vrefcnt(vp) != 0)
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1994-05-24 10:09:53 +00:00
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vprint("nfs_reclaim: pushing active", vp);
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1994-10-17 17:47:45 +00:00
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2008-06-26 10:21:54 +00:00
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/*
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* If the NLM is running, give it a chance to abort pending
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* locks.
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*/
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if (nfs_reclaim_p)
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nfs_reclaim_p(ap);
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2006-01-17 17:29:03 +00:00
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/*
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* Destroy the vm object and flush associated pages.
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*/
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vnode_destroy_vobject(vp);
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2005-03-16 11:28:19 +00:00
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vfs_hash_remove(vp);
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1994-05-24 10:09:53 +00:00
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1995-06-27 11:07:30 +00:00
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/*
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* Free up any directory cookie structures and
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* large file handle structures that might be associated with
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* this nfs node.
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*/
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if (vp->v_type == VDIR) {
|
2001-09-18 23:32:09 +00:00
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dp = LIST_FIRST(&np->n_cookies);
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1995-06-27 11:07:30 +00:00
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while (dp) {
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dp2 = dp;
|
2001-09-18 23:32:09 +00:00
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dp = LIST_NEXT(dp, ndm_list);
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2008-10-23 15:53:51 +00:00
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free((caddr_t)dp2, M_NFSDIROFF);
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1995-06-27 11:07:30 +00:00
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}
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}
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if (np->n_fhsize > NFS_SMALLFH) {
|
2008-10-23 15:53:51 +00:00
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free((caddr_t)np->n_fhp, M_NFSBIGFH);
|
1995-06-27 11:07:30 +00:00
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}
|
2006-05-19 00:04:24 +00:00
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mtx_destroy(&np->n_mtx);
|
2002-03-20 10:07:52 +00:00
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uma_zfree(nfsnode_zone, vp->v_data);
|
2002-07-11 17:54:58 +00:00
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vp->v_data = NULL;
|
1994-05-24 10:09:53 +00:00
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return (0);
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}
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