6008862bc2
most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64
591 lines
14 KiB
C
591 lines
14 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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u_int 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 file system or updating a file system
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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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|
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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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|
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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;
|
|
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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/*
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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(VT_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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|
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dprintf(("prenew "));
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vp->v_data = hp;
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|
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if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
|
|
vp->v_flag |= VROOT;
|
|
|
|
|
|
mtx_init(&hp->h_interlock, "hpfsnode interlock", NULL, MTX_DEF);
|
|
lockinit(&hp->h_lock, PINOD, "hpnode", VLKTIMEOUT, 0);
|
|
|
|
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_stdsync,
|
|
hpfs_vget,
|
|
hpfs_fhtovp,
|
|
vfs_stdcheckexp,
|
|
hpfs_vptofh,
|
|
hpfs_init,
|
|
hpfs_uninit,
|
|
vfs_stdextattrctl,
|
|
};
|
|
VFS_SET(hpfs_vfsops, hpfs, 0);
|