c162e9c2eb
closely what function is really doing. Update all existing consumers to use the new name. Introduce a new vfs_stdsync function, which iterates over mount point's vnodes and call FSYNC on each one of them in turn. Make nwfs and smbfs use this new function instead of rolling their own identical sync implementations. Reviewed by: jeff
590 lines
13 KiB
C
590 lines
13 KiB
C
/*-
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* Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.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_page.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <fs/hpfs/hpfs.h>
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#include <fs/hpfs/hpfsmount.h>
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#include <fs/hpfs/hpfs_subr.h>
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MALLOC_DEFINE(M_HPFSMNT, "HPFS mount", "HPFS mount structure");
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MALLOC_DEFINE(M_HPFSNO, "HPFS node", "HPFS node structure");
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struct sockaddr;
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static int hpfs_root(struct mount *, struct vnode **);
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static int hpfs_statfs(struct mount *, struct statfs *, struct thread *);
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static int hpfs_unmount(struct mount *, int, struct thread *);
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static int hpfs_vget(struct mount *mp, ino_t ino, int flags,
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struct vnode **vpp);
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static int hpfs_mountfs(register struct vnode *, struct mount *,
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struct hpfs_args *, struct thread *);
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static int hpfs_vptofh(struct vnode *, struct fid *);
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static int hpfs_fhtovp(struct mount *, struct fid *, struct vnode **);
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static int hpfs_mount(struct mount *, char *, caddr_t,
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struct nameidata *, struct thread *);
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static int hpfs_init(struct vfsconf *);
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static int hpfs_uninit(struct vfsconf *);
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static int
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hpfs_init (
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struct vfsconf *vcp )
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{
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dprintf(("hpfs_init():\n"));
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hpfs_hphashinit();
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return 0;
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}
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static int
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hpfs_uninit (vfsp)
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struct vfsconf *vfsp;
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{
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hpfs_hphashdestroy();
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return 0;;
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}
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static int
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hpfs_mount (
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struct mount *mp,
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char *path,
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caddr_t data,
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struct nameidata *ndp,
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struct thread *td )
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{
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size_t size;
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int err = 0;
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struct vnode *devvp;
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struct hpfs_args args;
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struct hpfsmount *hpmp = 0;
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dprintf(("hpfs_mount():\n"));
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/*
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***
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* Mounting non-root filesystem or updating a filesystem
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***
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*/
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/* copy in user arguments*/
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err = copyin(data, (caddr_t)&args, sizeof (struct hpfs_args));
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if (err)
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goto error_1; /* can't get arguments*/
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/*
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* If updating, check whether changing from read-only to
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* read/write; if there is no device name, that's all we do.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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dprintf(("hpfs_mount: MNT_UPDATE: "));
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hpmp = VFSTOHPFS(mp);
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if (args.fspec == 0) {
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dprintf(("export 0x%x\n",args.export.ex_flags));
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err = vfs_export(mp, &args.export);
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if (err) {
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printf("hpfs_mount: vfs_export failed %d\n",
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err);
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}
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goto success;
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} else {
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dprintf(("name [FAILED]\n"));
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err = EINVAL;
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goto success;
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}
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dprintf(("\n"));
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}
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/*
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* Not an update, or updating the name: look up the name
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* and verify that it refers to a sensible block device.
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*/
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
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err = namei(ndp);
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if (err) {
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/* can't get devvp!*/
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goto error_1;
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}
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devvp = ndp->ni_vp;
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if (!vn_isdisk(devvp, &err))
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goto error_2;
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/*
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********************
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* NEW MOUNT
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********************
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*/
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/*
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* Since this is a new mount, we want the names for
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* the device and the mount point copied in. If an
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* error occurs, the mountpoint is discarded by the
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* upper level code. Note that vfs_mount() handles
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* copying the mountpoint f_mntonname for us, so we
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* don't have to do it here unless we want to set it
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* to something other than "path" for some rason.
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*/
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/* Save "mounted from" info for mount point (NULL pad)*/
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copyinstr( args.fspec, /* device name*/
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mp->mnt_stat.f_mntfromname, /* save area*/
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MNAMELEN - 1, /* max size*/
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&size); /* real size*/
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bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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err = hpfs_mountfs(devvp, mp, &args, td);
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if (err)
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goto error_2;
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/*
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* Initialize FS stat information in mount struct; uses both
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* mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
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*
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* This code is common to root and non-root mounts
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*/
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(void)VFS_STATFS(mp, &mp->mnt_stat, td);
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goto success;
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error_2: /* error with devvp held*/
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/* release devvp before failing*/
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vrele(devvp);
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error_1: /* no state to back out*/
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success:
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return( err);
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}
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/*
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* Common code for mount and mountroot
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*/
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int
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hpfs_mountfs(devvp, mp, argsp, td)
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register struct vnode *devvp;
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struct mount *mp;
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struct hpfs_args *argsp;
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struct thread *td;
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{
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int error, ncount, ronly;
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struct sublock *sup;
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struct spblock *spp;
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struct hpfsmount *hpmp;
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struct buf *bp = NULL;
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struct vnode *vp;
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dev_t dev = devvp->v_rdev;
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dprintf(("hpfs_mountfs():\n"));
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/*
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* Disallow multiple mounts of the same device.
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* Disallow mounting of a device that is currently in use
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* (except for root, which might share swap device for miniroot).
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* Flush out any old buffers remaining from a previous use.
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*/
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error = vfs_mountedon(devvp);
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if (error)
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return (error);
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ncount = vcount(devvp);
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if (devvp->v_object)
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ncount -= 1;
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if (ncount > 1 && devvp != rootvp)
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return (EBUSY);
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0);
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VOP_UNLOCK(devvp, 0, td);
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if (error)
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return (error);
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ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td);
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VOP_UNLOCK(devvp, 0, td);
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if (error)
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return (error);
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/*
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* Do actual mount
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*/
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hpmp = malloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK | M_ZERO);
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/* Read in SuperBlock */
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error = bread(devvp, SUBLOCK, SUSIZE, NOCRED, &bp);
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if (error)
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goto failed;
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bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
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brelse(bp); bp = NULL;
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/* Read in SpareBlock */
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error = bread(devvp, SPBLOCK, SPSIZE, NOCRED, &bp);
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if (error)
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goto failed;
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bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
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brelse(bp); bp = NULL;
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sup = &hpmp->hpm_su;
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spp = &hpmp->hpm_sp;
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/* Check magic */
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if (sup->su_magic != SU_MAGIC) {
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printf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
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error = EINVAL;
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goto failed;
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}
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if (spp->sp_magic != SP_MAGIC) {
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printf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
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error = EINVAL;
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goto failed;
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}
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mp->mnt_data = (qaddr_t)hpmp;
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hpmp->hpm_devvp = devvp;
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hpmp->hpm_dev = devvp->v_rdev;
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hpmp->hpm_mp = mp;
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hpmp->hpm_uid = argsp->uid;
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hpmp->hpm_gid = argsp->gid;
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hpmp->hpm_mode = argsp->mode;
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error = hpfs_bminit(hpmp);
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if (error)
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goto failed;
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error = hpfs_cpinit(hpmp, argsp);
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if (error) {
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hpfs_bmdeinit(hpmp);
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goto failed;
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}
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error = hpfs_root(mp, &vp);
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if (error) {
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hpfs_cpdeinit(hpmp);
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hpfs_bmdeinit(hpmp);
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goto failed;
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}
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vput(vp);
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mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
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mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
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mp->mnt_maxsymlinklen = 0;
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mp->mnt_flag |= MNT_LOCAL;
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devvp->v_rdev->si_mountpoint = mp;
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return (0);
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failed:
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if (bp)
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brelse (bp);
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mp->mnt_data = (qaddr_t)NULL;
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devvp->v_rdev->si_mountpoint = NULL;
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(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, td);
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return (error);
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}
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static int
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hpfs_unmount(
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struct mount *mp,
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int mntflags,
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struct thread *td)
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{
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int error, flags, ronly;
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register struct hpfsmount *hpmp = VFSTOHPFS(mp);
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dprintf(("hpfs_unmount():\n"));
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ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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flags = 0;
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if(mntflags & MNT_FORCE)
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flags |= FORCECLOSE;
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dprintf(("hpfs_unmount: vflushing...\n"));
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error = vflush(mp, 0, flags);
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if (error) {
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printf("hpfs_unmount: vflush failed: %d\n",error);
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return (error);
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}
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hpmp->hpm_devvp->v_rdev->si_mountpoint = NULL;
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vinvalbuf(hpmp->hpm_devvp, V_SAVE, NOCRED, td, 0, 0);
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error = VOP_CLOSE(hpmp->hpm_devvp, ronly ? FREAD : FREAD|FWRITE,
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NOCRED, td);
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vrele(hpmp->hpm_devvp);
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dprintf(("hpfs_umount: freeing memory...\n"));
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hpfs_cpdeinit(hpmp);
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hpfs_bmdeinit(hpmp);
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mp->mnt_data = (qaddr_t)0;
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mp->mnt_flag &= ~MNT_LOCAL;
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FREE(hpmp, M_HPFSMNT);
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return (0);
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}
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static int
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hpfs_root(
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struct mount *mp,
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struct vnode **vpp )
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{
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int error = 0;
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struct hpfsmount *hpmp = VFSTOHPFS(mp);
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dprintf(("hpfs_root():\n"));
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error = VFS_VGET(mp, (ino_t)hpmp->hpm_su.su_rootfno, LK_EXCLUSIVE, vpp);
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if(error) {
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printf("hpfs_root: VFS_VGET failed: %d\n",error);
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return (error);
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}
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return (error);
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}
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static int
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hpfs_statfs(
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struct mount *mp,
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struct statfs *sbp,
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struct thread *td)
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{
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struct hpfsmount *hpmp = VFSTOHPFS(mp);
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dprintf(("hpfs_statfs(): HPFS%d.%d\n",
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hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
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sbp->f_type = mp->mnt_vfc->vfc_typenum;
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sbp->f_bsize = DEV_BSIZE;
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sbp->f_iosize = DEV_BSIZE;
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sbp->f_blocks = hpmp->hpm_su.su_btotal;
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sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
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sbp->f_ffree = 0;
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sbp->f_files = 0;
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if (sbp != &mp->mnt_stat) {
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bcopy((caddr_t)mp->mnt_stat.f_mntonname,
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(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
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bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
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(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
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}
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sbp->f_flags = mp->mnt_flag;
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return (0);
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}
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/*ARGSUSED*/
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static int
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hpfs_fhtovp(
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struct mount *mp,
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struct fid *fhp,
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struct vnode **vpp)
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{
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struct vnode *nvp;
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struct hpfid *hpfhp = (struct hpfid *)fhp;
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int error;
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if ((error = VFS_VGET(mp, hpfhp->hpfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
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*vpp = NULLVP;
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return (error);
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}
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/* XXX as unlink/rmdir/mkdir/creat are not currently possible
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* with HPFS, we don't need to check anything else for now */
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*vpp = nvp;
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return (0);
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}
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static int
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hpfs_vptofh(
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struct vnode *vp,
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struct fid *fhp)
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{
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register struct hpfsnode *hpp;
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register struct hpfid *hpfhp;
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hpp = VTOHP(vp);
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hpfhp = (struct hpfid *)fhp;
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hpfhp->hpfid_len = sizeof(struct hpfid);
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hpfhp->hpfid_ino = hpp->h_no;
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/* hpfhp->hpfid_gen = hpp->h_gen; */
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return (0);
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}
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static int
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hpfs_vget(
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struct mount *mp,
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ino_t ino,
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int flags,
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struct vnode **vpp)
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{
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struct hpfsmount *hpmp = VFSTOHPFS(mp);
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struct vnode *vp;
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struct hpfsnode *hp;
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struct buf *bp;
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struct thread *td = curthread; /* XXX */
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int error;
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dprintf(("hpfs_vget(0x%x): ",ino));
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*vpp = NULL;
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hp = NULL;
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vp = NULL;
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if ((error = hpfs_hphashvget(hpmp->hpm_dev, ino, flags, vpp, td)) != 0)
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return (error);
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if (*vpp != NULL) {
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dprintf(("hashed\n"));
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return (0);
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}
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/*
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* We have to lock node creation for a while,
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* but then we have to call getnewvnode(),
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* this may cause hpfs_reclaim() to be called,
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* this may need to VOP_VGET() parent dir for
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* update reasons, and if parent is not in
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* hash, we have to lock node creation...
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* To solve this, we MALLOC, getnewvnode and init while
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* not locked (probability of node appearence
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* at that time is little, and anyway - we'll
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* check for it).
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*/
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MALLOC(hp, struct hpfsnode *, sizeof(struct hpfsnode),
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M_HPFSNO, M_WAITOK);
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error = getnewvnode("hpfs", hpmp->hpm_mp, hpfs_vnodeop_p, &vp);
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if (error) {
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printf("hpfs_vget: can't get new vnode\n");
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FREE(hp, M_HPFSNO);
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return (error);
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}
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dprintf(("prenew "));
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vp->v_data = hp;
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|
|
if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
|
|
vp->v_vflag |= VV_ROOT;
|
|
|
|
|
|
mtx_init(&hp->h_interlock, "hpfsnode interlock", NULL, MTX_DEF);
|
|
|
|
hp->h_flag = H_INVAL;
|
|
hp->h_vp = vp;
|
|
hp->h_hpmp = hpmp;
|
|
hp->h_no = ino;
|
|
hp->h_dev = hpmp->hpm_dev;
|
|
hp->h_uid = hpmp->hpm_uid;
|
|
hp->h_gid = hpmp->hpm_uid;
|
|
hp->h_mode = hpmp->hpm_mode;
|
|
hp->h_devvp = hpmp->hpm_devvp;
|
|
VREF(hp->h_devvp);
|
|
|
|
error = vn_lock(vp, LK_EXCLUSIVE, td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
do {
|
|
if ((error =
|
|
hpfs_hphashvget(hpmp->hpm_dev, ino, flags, vpp, td))) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (*vpp != NULL) {
|
|
dprintf(("hashed2\n"));
|
|
vput(vp);
|
|
return (0);
|
|
}
|
|
} while(lockmgr(&hpfs_hphash_lock,LK_EXCLUSIVE|LK_SLEEPFAIL,NULL,NULL));
|
|
|
|
hpfs_hphashins(hp);
|
|
|
|
lockmgr(&hpfs_hphash_lock, LK_RELEASE, NULL, NULL);
|
|
|
|
error = bread(hpmp->hpm_devvp, ino, FNODESIZE, NOCRED, &bp);
|
|
if (error) {
|
|
printf("hpfs_vget: can't read ino %d\n",ino);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
|
|
brelse(bp);
|
|
|
|
if (hp->h_fn.fn_magic != FN_MAGIC) {
|
|
printf("hpfs_vget: MAGIC DOESN'T MATCH\n");
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
|
|
hp->h_flag &= ~H_INVAL;
|
|
|
|
*vpp = vp;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct vfsops hpfs_vfsops = {
|
|
hpfs_mount,
|
|
vfs_stdstart,
|
|
hpfs_unmount,
|
|
hpfs_root,
|
|
vfs_stdquotactl,
|
|
hpfs_statfs,
|
|
vfs_stdnosync,
|
|
hpfs_vget,
|
|
hpfs_fhtovp,
|
|
vfs_stdcheckexp,
|
|
hpfs_vptofh,
|
|
hpfs_init,
|
|
hpfs_uninit,
|
|
vfs_stdextattrctl,
|
|
};
|
|
VFS_SET(hpfs_vfsops, hpfs, 0);
|