950 lines
25 KiB
C
950 lines
25 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* @(#)nfs_vfsops.c 8.3 (Berkeley) 1/4/94
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* $Id: nfs_vfsops.c,v 1.25 1995/12/22 15:57:38 phk Exp $
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*/
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/signal.h>
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#include <sys/proc.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/systm.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_extern.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfsnode.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsmount.h>
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#include <nfs/xdr_subs.h>
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#include <nfs/nfsm_subs.h>
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#include <nfs/nfsdiskless.h>
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#include <nfs/nqnfs.h>
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extern int nfs_mountroot __P((void));
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extern int nfs_ticks;
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struct nfsstats nfsstats;
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SYSCTL_NODE(_fs, MOUNT_NFS, nfs, CTLFLAG_RW, 0, "NFS filesystem");
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SYSCTL_STRUCT(_fs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
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&nfsstats, nfsstats, "");
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static int nfs_iosize __P((struct nfsmount *nmp));
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static int mountnfs __P((struct nfs_args *,struct mount *,
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struct mbuf *,char *,char *,struct vnode **));
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static int nfs_mount __P(( struct mount *mp, char *path, caddr_t data,
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struct nameidata *ndp, struct proc *p));
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static int nfs_start __P(( struct mount *mp, int flags,
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struct proc *p));
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static int nfs_unmount __P(( struct mount *mp, int mntflags,
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struct proc *p));
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static int nfs_root __P(( struct mount *mp, struct vnode **vpp));
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static int nfs_quotactl __P(( struct mount *mp, int cmds, uid_t uid,
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caddr_t arg, struct proc *p));
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static int nfs_statfs __P(( struct mount *mp, struct statfs *sbp,
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struct proc *p));
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static int nfs_sync __P(( struct mount *mp, int waitfor,
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struct ucred *cred, struct proc *p));
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static int nfs_vptofh __P(( struct vnode *vp, struct fid *fhp));
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static int nfs_fhtovp __P((struct mount *mp, struct fid *fhp,
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struct mbuf *nam, struct vnode **vpp,
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int *exflagsp, struct ucred **credanonp));
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static int nfs_vget __P((struct mount *, ino_t, struct vnode **));
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/*
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* nfs vfs operations.
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*/
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static struct vfsops nfs_vfsops = {
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nfs_mount,
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nfs_start,
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nfs_unmount,
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nfs_root,
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nfs_quotactl,
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nfs_statfs,
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nfs_sync,
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nfs_vget,
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nfs_fhtovp,
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nfs_vptofh,
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nfs_init,
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};
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VFS_SET(nfs_vfsops, nfs, MOUNT_NFS, VFCF_NETWORK);
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/*
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* This structure must be filled in by a primary bootstrap or bootstrap
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* server for a diskless/dataless machine. It is initialized below just
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* to ensure that it is allocated to initialized data (.data not .bss).
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*/
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struct nfs_diskless nfs_diskless = { 0 };
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int nfs_diskless_valid = 0;
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void nfsargs_ntoh __P((struct nfs_args *));
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static struct mount *nfs_mountdiskless __P((char *, char *, int,
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struct sockaddr_in *, struct nfs_args *, register struct vnode **));
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static int nfs_iosize(nmp)
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struct nfsmount* nmp;
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{
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int iosize;
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/*
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* Calculate the size used for io buffers. Use the larger
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* of the two sizes to minimise nfs requests but make sure
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* that it is at least one VM page to avoid wasting buffer
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* space.
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*/
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iosize = max(nmp->nm_rsize, nmp->nm_wsize);
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if (iosize < NBPG) iosize = NBPG;
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return iosize;
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}
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/*
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* nfs statfs call
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*/
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int
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nfs_statfs(mp, sbp, p)
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struct mount *mp;
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register struct statfs *sbp;
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struct proc *p;
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{
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register struct vnode *vp;
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register struct nfs_statfs *sfp;
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register caddr_t cp;
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register u_long *tl;
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register long t1, t2;
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caddr_t bpos, dpos, cp2;
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struct nfsmount *nmp = VFSTONFS(mp);
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int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr;
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struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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struct ucred *cred;
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struct nfsnode *np;
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u_quad_t tquad;
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#ifndef nolint
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sfp = (struct nfs_statfs *)0;
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#endif
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error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
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if (error)
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return (error);
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vp = NFSTOV(np);
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cred = crget();
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cred->cr_ngroups = 1;
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if (v3 && (nmp->nm_flag & NFSMNT_GOTFSINFO) == 0)
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(void)nfs_fsinfo(nmp, vp, cred, p);
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nfsstats.rpccnt[NFSPROC_FSSTAT]++;
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nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3));
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nfsm_fhtom(vp, v3);
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nfsm_request(vp, NFSPROC_FSSTAT, p, cred);
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if (v3)
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nfsm_postop_attr(vp, retattr);
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if (!error)
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nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
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#ifdef __NetBSD__
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#ifdef COMPAT_09
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sbp->f_type = 2;
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#else
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sbp->f_type = 0;
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#endif
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#else
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sbp->f_type = MOUNT_NFS;
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#endif
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sbp->f_flags = nmp->nm_flag;
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sbp->f_iosize = nfs_iosize(nmp);
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if (v3) {
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sbp->f_bsize = NFS_FABLKSIZE;
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fxdr_hyper(&sfp->sf_tbytes, &tquad);
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sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
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fxdr_hyper(&sfp->sf_fbytes, &tquad);
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sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
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fxdr_hyper(&sfp->sf_abytes, &tquad);
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sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
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sbp->f_files = (fxdr_unsigned(long, sfp->sf_tfiles.nfsuquad[1])
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& 0x7fffffff);
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sbp->f_ffree = (fxdr_unsigned(long, sfp->sf_ffiles.nfsuquad[1])
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& 0x7fffffff);
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} else {
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sbp->f_bsize = fxdr_unsigned(long, sfp->sf_bsize);
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sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks);
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sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree);
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sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail);
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sbp->f_files = 0;
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sbp->f_ffree = 0;
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}
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if (sbp != &mp->mnt_stat) {
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bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
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bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
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}
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nfsm_reqdone;
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vput(vp);
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crfree(cred);
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return (error);
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}
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/*
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* nfs version 3 fsinfo rpc call
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*/
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int
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nfs_fsinfo(nmp, vp, cred, p)
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register struct nfsmount *nmp;
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register struct vnode *vp;
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struct ucred *cred;
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struct proc *p;
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{
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register struct nfsv3_fsinfo *fsp;
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register caddr_t cp;
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register long t1, t2;
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register u_long *tl, pref, max;
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caddr_t bpos, dpos, cp2;
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int error = 0, retattr;
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struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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nfsstats.rpccnt[NFSPROC_FSINFO]++;
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nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1));
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nfsm_fhtom(vp, 1);
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nfsm_request(vp, NFSPROC_FSINFO, p, cred);
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nfsm_postop_attr(vp, retattr);
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if (!error) {
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nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
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pref = fxdr_unsigned(u_long, fsp->fs_wtpref);
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if (pref < nmp->nm_wsize)
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nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
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~(NFS_FABLKSIZE - 1);
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max = fxdr_unsigned(u_long, fsp->fs_wtmax);
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if (max < nmp->nm_wsize) {
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nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
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if (nmp->nm_wsize == 0)
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nmp->nm_wsize = max;
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}
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pref = fxdr_unsigned(u_long, fsp->fs_rtpref);
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if (pref < nmp->nm_rsize)
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nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
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~(NFS_FABLKSIZE - 1);
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max = fxdr_unsigned(u_long, fsp->fs_rtmax);
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if (max < nmp->nm_rsize) {
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nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
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if (nmp->nm_rsize == 0)
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nmp->nm_rsize = max;
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}
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pref = fxdr_unsigned(u_long, fsp->fs_dtpref);
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if (pref < nmp->nm_readdirsize)
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nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
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~(NFS_DIRBLKSIZ - 1);
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if (max < nmp->nm_readdirsize) {
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nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
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if (nmp->nm_readdirsize == 0)
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nmp->nm_readdirsize = max;
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}
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nmp->nm_flag |= NFSMNT_GOTFSINFO;
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}
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nfsm_reqdone;
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return (error);
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}
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/*
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* Mount a remote root fs via. nfs. This depends on the info in the
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* nfs_diskless structure that has been filled in properly by some primary
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* bootstrap.
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* It goes something like this:
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* - do enough of "ifconfig" by calling ifioctl() so that the system
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* can talk to the server
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* - If nfs_diskless.mygateway is filled in, use that address as
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* a default gateway.
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* - hand craft the swap nfs vnode hanging off a fake mount point
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* if swdevt[0].sw_dev == NODEV
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* - build the rootfs mount point and call mountnfs() to do the rest.
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*/
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int
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nfs_mountroot()
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{
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register struct mount *mp;
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register struct nfs_diskless *nd = &nfs_diskless;
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struct socket *so;
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struct vnode *vp;
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struct proc *p = curproc; /* XXX */
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int error, i;
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u_long l;
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char buf[128];
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/*
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* XXX time must be non-zero when we init the interface or else
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* the arp code will wedge...
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*/
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if (time.tv_sec == 0)
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time.tv_sec = 1;
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/*
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* XXX splnet, so networks will receive...
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*/
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splnet();
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#ifdef notyet
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/* Set up swap credentials. */
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proc0.p_ucred->cr_uid = ntohl(nd->swap_ucred.cr_uid);
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proc0.p_ucred->cr_gid = ntohl(nd->swap_ucred.cr_gid);
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if ((proc0.p_ucred->cr_ngroups = ntohs(nd->swap_ucred.cr_ngroups)) >
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NGROUPS)
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proc0.p_ucred->cr_ngroups = NGROUPS;
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for (i = 0; i < proc0.p_ucred->cr_ngroups; i++)
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proc0.p_ucred->cr_groups[i] = ntohl(nd->swap_ucred.cr_groups[i]);
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#endif
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/*
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* Do enough of ifconfig(8) so that the critical net interface can
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* talk to the server.
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*/
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error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0);
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if (error)
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panic("nfs_mountroot: socreate(%04x): %d",
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nd->myif.ifra_addr.sa_family, error);
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/*
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* We might not have been told the right interface, so we pass
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* over the first ten interfaces of the same kind, until we get
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* one of them configured.
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*/
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for (i = strlen(nd->myif.ifra_name) - 1;
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nd->myif.ifra_name[i] >= '0' &&
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nd->myif.ifra_name[i] <= '9';
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nd->myif.ifra_name[i] ++) {
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error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, p);
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if(!error)
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break;
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}
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if (error)
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panic("nfs_mountroot: SIOCAIFADDR: %d", error);
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soclose(so);
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/*
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* If the gateway field is filled in, set it as the default route.
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*/
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if (nd->mygateway.sin_len != 0) {
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struct sockaddr_in mask, sin;
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bzero((caddr_t)&mask, sizeof(mask));
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sin = mask;
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sin.sin_family = AF_INET;
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sin.sin_len = sizeof(sin);
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error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
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(struct sockaddr *)&nd->mygateway,
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(struct sockaddr *)&mask,
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RTF_UP | RTF_GATEWAY, (struct rtentry **)0);
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if (error)
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panic("nfs_mountroot: RTM_ADD: %d", error);
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}
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if (nd->swap_nblks) {
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/* Convert to DEV_BSIZE instead of Kilobyte */
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nd->swap_nblks *= 2;
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/*
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* Create a fake mount point just for the swap vnode so that the
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* swap file can be on a different server from the rootfs.
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*/
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nd->swap_args.fh = nd->swap_fh;
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/*
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* If using nfsv3_diskless, replace NFSX_V2FH with
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* nd->swap_fhsize.
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*/
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nd->swap_args.fhsize = NFSX_V2FH;
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l = ntohl(nd->swap_saddr.sin_addr.s_addr);
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sprintf(buf,"%ld.%ld.%ld.%ld:%s",
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(l >> 24) & 0xff, (l >> 16) & 0xff,
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(l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
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printf("NFS SWAP: %s\n",buf);
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(void) nfs_mountdiskless(buf, "/swap", 0,
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&nd->swap_saddr, &nd->swap_args, &vp);
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VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
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nd->swap_nblks * DEV_BSIZE ;
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/*
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* Since the swap file is not the root dir of a file system,
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* hack it to a regular file.
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*/
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vp->v_type = VREG;
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vp->v_flag = 0;
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VREF(vp);
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swaponvp(p, vp, NODEV, nd->swap_nblks);
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}
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/*
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* Create the rootfs mount point.
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*/
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nd->root_args.fh = nd->root_fh;
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/*
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* If using nfsv3_diskless, replace NFSX_V2FH with nd->root_fhsize.
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*/
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nd->root_args.fhsize = NFSX_V2FH;
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l = ntohl(nd->root_saddr.sin_addr.s_addr);
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sprintf(buf,"%ld.%ld.%ld.%ld:%s",
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(l >> 24) & 0xff, (l >> 16) & 0xff,
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(l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
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printf("NFS ROOT: %s\n",buf);
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mp = nfs_mountdiskless(buf, "/", MNT_RDONLY,
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&nd->root_saddr, &nd->root_args, &vp);
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if (vfs_lock(mp))
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panic("nfs_mountroot: vfs_lock");
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CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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|
mp->mnt_flag |= MNT_ROOTFS;
|
|
mp->mnt_vnodecovered = NULLVP;
|
|
vfs_unlock(mp);
|
|
rootvp = vp;
|
|
|
|
/*
|
|
* This is not really an nfs issue, but it is much easier to
|
|
* set hostname here and then let the "/etc/rc.xxx" files
|
|
* mount the right /var based upon its preset value.
|
|
*/
|
|
bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
|
|
hostname[MAXHOSTNAMELEN - 1] = '\0';
|
|
for (i = 0; i < MAXHOSTNAMELEN; i++)
|
|
if (hostname[i] == '\0')
|
|
break;
|
|
inittodr(ntohl(nd->root_time));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Internal version of mount system call for diskless setup.
|
|
*/
|
|
static struct mount *
|
|
nfs_mountdiskless(path, which, mountflag, sin, args, vpp)
|
|
char *path;
|
|
char *which;
|
|
int mountflag;
|
|
struct sockaddr_in *sin;
|
|
struct nfs_args *args;
|
|
register struct vnode **vpp;
|
|
{
|
|
register struct mount *mp;
|
|
register struct mbuf *m;
|
|
register int error;
|
|
|
|
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
|
|
M_MOUNT, M_NOWAIT);
|
|
if (mp == NULL)
|
|
panic("nfs_mountroot: %s mount malloc", which);
|
|
bzero((char *)mp, (u_long)sizeof(struct mount));
|
|
mp->mnt_op = &nfs_vfsops;
|
|
mp->mnt_flag = mountflag;
|
|
|
|
MGET(m, MT_SONAME, M_DONTWAIT);
|
|
if (m == NULL)
|
|
panic("nfs_mountroot: %s mount mbuf", which);
|
|
bcopy((caddr_t)sin, mtod(m, caddr_t), sin->sin_len);
|
|
m->m_len = sin->sin_len;
|
|
error = mountnfs(args, mp, m, which, path, vpp);
|
|
if (error)
|
|
panic("nfs_mountroot: mount %s on %s: %d", path, which, error);
|
|
|
|
return (mp);
|
|
}
|
|
|
|
|
|
/*
|
|
* VFS Operations.
|
|
*
|
|
* mount system call
|
|
* It seems a bit dumb to copyinstr() the host and path here and then
|
|
* bcopy() them in mountnfs(), but I wanted to detect errors before
|
|
* doing the sockargs() call because sockargs() allocates an mbuf and
|
|
* an error after that means that I have to release the mbuf.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_mount(mp, path, data, ndp, p)
|
|
struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
int error;
|
|
struct nfs_args args;
|
|
struct mbuf *nam;
|
|
struct vnode *vp;
|
|
char pth[MNAMELEN], hst[MNAMELEN];
|
|
u_int len;
|
|
u_char nfh[NFSX_V3FHMAX];
|
|
|
|
error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
|
|
if (error)
|
|
return (error);
|
|
error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
|
|
if (error)
|
|
return (error);
|
|
error = copyinstr(path, pth, MNAMELEN-1, &len);
|
|
if (error)
|
|
return (error);
|
|
bzero(&pth[len], MNAMELEN - len);
|
|
error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
|
|
if (error)
|
|
return (error);
|
|
bzero(&hst[len], MNAMELEN - len);
|
|
/* sockargs() call must be after above copyin() calls */
|
|
error = sockargs(&nam, (caddr_t)args.addr, args.addrlen, MT_SONAME);
|
|
if (error)
|
|
return (error);
|
|
args.fh = nfh;
|
|
error = mountnfs(&args, mp, nam, pth, hst, &vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
static int
|
|
mountnfs(argp, mp, nam, pth, hst, vpp)
|
|
register struct nfs_args *argp;
|
|
register struct mount *mp;
|
|
struct mbuf *nam;
|
|
char *pth, *hst;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
int error, maxio;
|
|
struct vattr attrs;
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
nmp = VFSTONFS(mp);
|
|
/* update paths, file handles, etc, here XXX */
|
|
m_freem(nam);
|
|
return (0);
|
|
} else {
|
|
MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount),
|
|
M_NFSMNT, M_WAITOK);
|
|
bzero((caddr_t)nmp, sizeof (struct nfsmount));
|
|
TAILQ_INIT(&nmp->nm_uidlruhead);
|
|
mp->mnt_data = (qaddr_t)nmp;
|
|
}
|
|
getnewfsid(mp, MOUNT_NFS);
|
|
nmp->nm_mountp = mp;
|
|
nmp->nm_flag = argp->flags;
|
|
if (nmp->nm_flag & NFSMNT_NQNFS)
|
|
/*
|
|
* We have to set mnt_maxsymlink to a non-zero value so
|
|
* that COMPAT_43 routines will know that we are setting
|
|
* the d_type field in directories (and can zero it for
|
|
* unsuspecting binaries).
|
|
*/
|
|
mp->mnt_maxsymlinklen = 1;
|
|
nmp->nm_timeo = NFS_TIMEO;
|
|
nmp->nm_retry = NFS_RETRANS;
|
|
nmp->nm_wsize = NFS_WSIZE;
|
|
nmp->nm_rsize = NFS_RSIZE;
|
|
nmp->nm_readdirsize = NFS_READDIRSIZE;
|
|
nmp->nm_numgrps = NFS_MAXGRPS;
|
|
nmp->nm_readahead = NFS_DEFRAHEAD;
|
|
nmp->nm_leaseterm = NQ_DEFLEASE;
|
|
nmp->nm_deadthresh = NQ_DEADTHRESH;
|
|
CIRCLEQ_INIT(&nmp->nm_timerhead);
|
|
nmp->nm_inprog = NULLVP;
|
|
nmp->nm_fhsize = argp->fhsize;
|
|
bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
|
|
#ifdef __NetBSD__
|
|
#ifdef COMPAT_09
|
|
mp->mnt_stat.f_type = 2;
|
|
#else
|
|
mp->mnt_stat.f_type = 0;
|
|
#endif
|
|
#else
|
|
mp->mnt_stat.f_type = MOUNT_NFS;
|
|
#endif
|
|
bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
|
|
bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
|
|
nmp->nm_nam = nam;
|
|
|
|
if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
|
|
nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
|
|
if (nmp->nm_timeo < NFS_MINTIMEO)
|
|
nmp->nm_timeo = NFS_MINTIMEO;
|
|
else if (nmp->nm_timeo > NFS_MAXTIMEO)
|
|
nmp->nm_timeo = NFS_MAXTIMEO;
|
|
}
|
|
|
|
if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
|
|
nmp->nm_retry = argp->retrans;
|
|
if (nmp->nm_retry > NFS_MAXREXMIT)
|
|
nmp->nm_retry = NFS_MAXREXMIT;
|
|
}
|
|
|
|
if (argp->flags & NFSMNT_NFSV3) {
|
|
if (argp->sotype == SOCK_DGRAM)
|
|
maxio = NFS_MAXDGRAMDATA;
|
|
else
|
|
maxio = NFS_MAXDATA;
|
|
} else
|
|
maxio = NFS_V2MAXDATA;
|
|
|
|
if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
|
|
nmp->nm_wsize = argp->wsize;
|
|
/* Round down to multiple of blocksize */
|
|
nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_wsize <= 0)
|
|
nmp->nm_wsize = NFS_FABLKSIZE;
|
|
}
|
|
if (nmp->nm_wsize > maxio)
|
|
nmp->nm_wsize = maxio;
|
|
if (nmp->nm_wsize > MAXBSIZE)
|
|
nmp->nm_wsize = MAXBSIZE;
|
|
|
|
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
|
|
nmp->nm_rsize = argp->rsize;
|
|
/* Round down to multiple of blocksize */
|
|
nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_rsize <= 0)
|
|
nmp->nm_rsize = NFS_FABLKSIZE;
|
|
}
|
|
if (nmp->nm_rsize > maxio)
|
|
nmp->nm_rsize = maxio;
|
|
if (nmp->nm_rsize > MAXBSIZE)
|
|
nmp->nm_rsize = MAXBSIZE;
|
|
|
|
if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
|
|
nmp->nm_readdirsize = argp->readdirsize;
|
|
/* Round down to multiple of blocksize */
|
|
nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1);
|
|
if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
|
|
nmp->nm_readdirsize = NFS_DIRBLKSIZ;
|
|
}
|
|
if (nmp->nm_readdirsize > maxio)
|
|
nmp->nm_readdirsize = maxio;
|
|
|
|
if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 &&
|
|
argp->maxgrouplist <= NFS_MAXGRPS)
|
|
nmp->nm_numgrps = argp->maxgrouplist;
|
|
if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 &&
|
|
argp->readahead <= NFS_MAXRAHEAD)
|
|
nmp->nm_readahead = argp->readahead;
|
|
if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2 &&
|
|
argp->leaseterm <= NQ_MAXLEASE)
|
|
nmp->nm_leaseterm = argp->leaseterm;
|
|
if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1 &&
|
|
argp->deadthresh <= NQ_NEVERDEAD)
|
|
nmp->nm_deadthresh = argp->deadthresh;
|
|
/* Set up the sockets and per-host congestion */
|
|
nmp->nm_sotype = argp->sotype;
|
|
nmp->nm_soproto = argp->proto;
|
|
|
|
/*
|
|
* For Connection based sockets (TCP,...) defer the connect until
|
|
* the first request, in case the server is not responding.
|
|
*/
|
|
if (nmp->nm_sotype == SOCK_DGRAM &&
|
|
(error = nfs_connect(nmp, (struct nfsreq *)0)))
|
|
goto bad;
|
|
|
|
/*
|
|
* This is silly, but it has to be set so that vinifod() works.
|
|
* We do not want to do an nfs_statfs() here since we can get
|
|
* stuck on a dead server and we are holding a lock on the mount
|
|
* point.
|
|
*/
|
|
mp->mnt_stat.f_iosize = nfs_iosize(nmp);
|
|
/*
|
|
* A reference count is needed on the nfsnode representing the
|
|
* remote root. If this object is not persistent, then backward
|
|
* traversals of the mount point (i.e. "..") will not work if
|
|
* the nfsnode gets flushed out of the cache. Ufs does not have
|
|
* this problem, because one can identify root inodes by their
|
|
* number == ROOTINO (2).
|
|
*/
|
|
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
|
|
if (error)
|
|
goto bad;
|
|
*vpp = NFSTOV(np);
|
|
|
|
/*
|
|
* Get file attributes for the mountpoint. This has the side
|
|
* effect of filling in (*vpp)->v_type with the correct value.
|
|
*/
|
|
VOP_GETATTR(*vpp, &attrs, curproc->p_ucred, curproc);
|
|
|
|
/*
|
|
* Lose the lock but keep the ref.
|
|
*/
|
|
VOP_UNLOCK(*vpp);
|
|
|
|
return (0);
|
|
bad:
|
|
nfs_disconnect(nmp);
|
|
free((caddr_t)nmp, M_NFSMNT);
|
|
m_freem(nam);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
static int
|
|
nfs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
register struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
struct vnode *vp;
|
|
int error, flags = 0;
|
|
|
|
if (mntflags & MNT_FORCE) {
|
|
if (!doforce)
|
|
return (EINVAL);
|
|
flags |= FORCECLOSE;
|
|
}
|
|
nmp = VFSTONFS(mp);
|
|
/*
|
|
* Goes something like this..
|
|
* - Check for activity on the root vnode (other than ourselves).
|
|
* - Call vflush() to clear out vnodes for this file system,
|
|
* except for the root vnode.
|
|
* - Decrement reference on the vnode representing remote root.
|
|
* - Close the socket
|
|
* - Free up the data structures
|
|
*/
|
|
/*
|
|
* We need to decrement the ref. count on the nfsnode representing
|
|
* the remote root. See comment in mountnfs(). The VFS unmount()
|
|
* has done vput on this vnode, otherwise we would get deadlock!
|
|
*/
|
|
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
|
|
if (error)
|
|
return(error);
|
|
vp = NFSTOV(np);
|
|
if (vp->v_usecount > 2) {
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/*
|
|
* Must handshake with nqnfs_clientd() if it is active.
|
|
*/
|
|
nmp->nm_flag |= NFSMNT_DISMINPROG;
|
|
while (nmp->nm_inprog != NULLVP)
|
|
(void) tsleep((caddr_t)&lbolt, PSOCK, "nfsdism", 0);
|
|
error = vflush(mp, vp, flags);
|
|
if (error) {
|
|
vput(vp);
|
|
nmp->nm_flag &= ~NFSMNT_DISMINPROG;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* We are now committed to the unmount.
|
|
* For NQNFS, let the server daemon free the nfsmount structure.
|
|
*/
|
|
if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB))
|
|
nmp->nm_flag |= NFSMNT_DISMNT;
|
|
|
|
/*
|
|
* There are two reference counts and one lock to get rid of here.
|
|
*/
|
|
vput(vp);
|
|
vrele(vp);
|
|
vgone(vp);
|
|
nfs_disconnect(nmp);
|
|
m_freem(nmp->nm_nam);
|
|
|
|
if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0)
|
|
free((caddr_t)nmp, M_NFSMNT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return root of a filesystem
|
|
*/
|
|
static int
|
|
nfs_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct vnode *vp;
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
int error;
|
|
|
|
nmp = VFSTONFS(mp);
|
|
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
|
|
if (error)
|
|
return (error);
|
|
vp = NFSTOV(np);
|
|
VOP_UNLOCK(vp);
|
|
if (vp->v_type == VNON)
|
|
vp->v_type = VDIR;
|
|
vp->v_flag = VROOT;
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
extern int syncprt;
|
|
|
|
/*
|
|
* Flush out the buffer cache
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register struct vnode *vp;
|
|
int error, allerror = 0;
|
|
|
|
/*
|
|
* Force stale buffer cache information to be flushed.
|
|
*/
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first;
|
|
vp != NULL;
|
|
vp = vp->v_mntvnodes.le_next) {
|
|
/*
|
|
* If the vnode that we are about to sync is no longer
|
|
* associated with this mount point, start over.
|
|
*/
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL)
|
|
continue;
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
error = VOP_FSYNC(vp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
vput(vp);
|
|
}
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* NFS flat namespace lookup.
|
|
* Currently unsupported.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* At this point, this should never happen
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle, should never happen either
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Vfs start routine, a no-op.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Do operations associated with quotas, not supported
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_quotactl(mp, cmd, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmd;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|