1396 lines
37 KiB
C
1396 lines
37 KiB
C
/*
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* Copyright (c) 1989, 1991, 1993, 1994
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* The Regents of the University of California. 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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* 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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* @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95
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* $FreeBSD$
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*/
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#include "opt_quota.h"
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#include "opt_ufs.h"
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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/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/conf.h>
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#include <sys/fcntl.h>
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#include <sys/disklabel.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <ufs/ufs/extattr.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part");
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static int ffs_sbupdate __P((struct ufsmount *, int));
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int ffs_reload __P((struct mount *,struct ucred *,struct thread *));
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static int ffs_oldfscompat __P((struct fs *));
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static int ffs_init __P((struct vfsconf *));
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static struct vfsops ufs_vfsops = {
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ffs_mount,
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ufs_start,
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ffs_unmount,
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ufs_root,
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ufs_quotactl,
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ffs_statfs,
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ffs_sync,
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ffs_vget,
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ffs_fhtovp,
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vfs_stdcheckexp,
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ffs_vptofh,
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ffs_init,
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vfs_stduninit,
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#ifdef UFS_EXTATTR
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ufs_extattrctl,
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#else
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vfs_stdextattrctl,
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#endif
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};
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VFS_SET(ufs_vfsops, ufs, 0);
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/*
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* ffs_mount
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*
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* Called when mounting local physical media
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*
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* PARAMETERS:
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* mountroot
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* mp mount point structure
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* path NULL (flag for root mount!!!)
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* data <unused>
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* ndp <unused>
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* p process (user credentials check [statfs])
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*
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* mount
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* mp mount point structure
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* path path to mount point
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* data pointer to argument struct in user space
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* ndp mount point namei() return (used for
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* credentials on reload), reused to look
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* up block device.
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* p process (user credentials check)
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*
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* RETURNS: 0 Success
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* !0 error number (errno.h)
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*
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* LOCK STATE:
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*
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* ENTRY
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* mount point is locked
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* EXIT
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* mount point is locked
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*
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* NOTES:
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* A NULL path can be used for a flag since the mount
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* system call will fail with EFAULT in copyinstr in
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* namei() if it is a genuine NULL from the user.
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*/
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int
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ffs_mount(mp, path, data, ndp, td)
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struct mount *mp; /* mount struct pointer*/
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char *path; /* path to mount point*/
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caddr_t data; /* arguments to FS specific mount*/
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struct nameidata *ndp; /* mount point credentials*/
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struct thread *td; /* process requesting mount*/
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{
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size_t size;
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struct vnode *devvp;
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struct ufs_args args;
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struct ufsmount *ump = 0;
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register struct fs *fs;
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int error, flags;
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mode_t accessmode;
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/*
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* Use NULL path to indicate we are mounting the root file system.
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*/
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if (path == NULL) {
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if ((error = bdevvp(rootdev, &rootvp))) {
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printf("ffs_mountroot: can't find rootvp\n");
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return (error);
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}
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if ((error = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0)
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return (error);
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(void)VFS_STATFS(mp, &mp->mnt_stat, td);
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return (0);
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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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if ((error = copyin(data, (caddr_t)&args, sizeof(struct ufs_args)))!= 0)
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return (error);
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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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ump = VFSTOUFS(mp);
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fs = ump->um_fs;
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devvp = ump->um_devvp;
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if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
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if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
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return (error);
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flags = WRITECLOSE;
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if (mp->mnt_flag & MNT_FORCE)
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flags |= FORCECLOSE;
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if (mp->mnt_flag & MNT_SOFTDEP) {
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error = softdep_flushfiles(mp, flags, td);
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} else {
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error = ffs_flushfiles(mp, flags, td);
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}
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if (error) {
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vn_finished_write(mp);
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return (error);
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}
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if (fs->fs_pendingblocks != 0 ||
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fs->fs_pendinginodes != 0) {
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printf("%s: update error: blocks %d files %d\n",
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fs->fs_fsmnt, fs->fs_pendingblocks,
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fs->fs_pendinginodes);
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fs->fs_pendingblocks = 0;
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fs->fs_pendinginodes = 0;
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}
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fs->fs_ronly = 1;
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if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0)
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fs->fs_clean = 1;
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if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) {
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fs->fs_ronly = 0;
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fs->fs_clean = 0;
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vn_finished_write(mp);
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return (error);
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}
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vn_finished_write(mp);
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}
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if ((mp->mnt_flag & MNT_RELOAD) &&
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(error = ffs_reload(mp, ndp->ni_cnd.cn_cred, td)) != 0)
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return (error);
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if (fs->fs_ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
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/*
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* If upgrade to read-write by non-root, then verify
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* that user has necessary permissions on the device.
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*/
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if (suser_td(td)) {
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
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td->td_proc->p_ucred, td)) != 0) {
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VOP_UNLOCK(devvp, 0, td);
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return (error);
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}
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VOP_UNLOCK(devvp, 0, td);
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}
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fs->fs_flags &= ~FS_UNCLEAN;
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if (fs->fs_clean == 0) {
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fs->fs_flags |= FS_UNCLEAN;
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if ((mp->mnt_flag & MNT_FORCE) ||
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((fs->fs_flags & FS_NEEDSFSCK) == 0 &&
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(fs->fs_flags & FS_DOSOFTDEP))) {
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printf("WARNING: %s was not %s\n",
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fs->fs_fsmnt, "properly dismounted");
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} else {
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printf(
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"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
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fs->fs_fsmnt);
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return (EPERM);
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}
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}
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if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
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return (error);
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fs->fs_ronly = 0;
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fs->fs_clean = 0;
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if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) {
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vn_finished_write(mp);
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return (error);
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}
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/* check to see if we need to start softdep */
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if ((fs->fs_flags & FS_DOSOFTDEP) &&
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(error = softdep_mount(devvp, mp, fs, td->td_proc->p_ucred))){
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vn_finished_write(mp);
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return (error);
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}
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if (fs->fs_snapinum[0] != 0)
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ffs_snapshot_mount(mp);
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vn_finished_write(mp);
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}
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/*
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* Soft updates is incompatible with "async",
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* so if we are doing softupdates stop the user
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* from setting the async flag in an update.
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* Softdep_mount() clears it in an initial mount
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* or ro->rw remount.
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*/
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if (mp->mnt_flag & MNT_SOFTDEP)
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mp->mnt_flag &= ~MNT_ASYNC;
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/*
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* If not updating name, process export requests.
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*/
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if (args.fspec == 0)
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return (vfs_export(mp, &args.export));
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/*
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* If this is a snapshot request, take the snapshot.
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*/
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if (mp->mnt_flag & MNT_SNAPSHOT)
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return (ffs_snapshot(mp, args.fspec));
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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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if ((error = namei(ndp)) != 0)
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return (error);
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NDFREE(ndp, NDF_ONLY_PNBUF);
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devvp = ndp->ni_vp;
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if (!vn_isdisk(devvp, &error)) {
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vrele(devvp);
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return (error);
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}
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/*
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* If mount by non-root, then verify that user has necessary
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* permissions on the device.
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*/
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if (suser_td(td)) {
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accessmode = VREAD;
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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accessmode |= VWRITE;
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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if ((error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td))!= 0){
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vput(devvp);
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return (error);
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}
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VOP_UNLOCK(devvp, 0, td);
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}
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if (mp->mnt_flag & MNT_UPDATE) {
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/*
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* Update only
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*
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* If it's not the same vnode, or at least the same device
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* then it's not correct.
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*/
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if (devvp != ump->um_devvp &&
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devvp->v_rdev != ump->um_devvp->v_rdev)
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error = EINVAL; /* needs translation */
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vrele(devvp);
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if (error)
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return (error);
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} else {
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/*
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* New mount
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*
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* We need the name for the mount point (also used for
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* "last mounted on") copied in. If an error occurs,
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* the mount point is discarded by the upper level code.
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* Note that vfs_mount() populates f_mntonname for us.
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*/
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if ((error = ffs_mountfs(devvp, mp, td, M_FFSNODE)) != 0) {
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vrele(devvp);
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return (error);
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}
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}
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/*
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* Save "mounted from" device name info for mount point (NULL pad).
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*/
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copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
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bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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/*
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* Initialize filesystem stat information in mount struct.
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*/
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(void)VFS_STATFS(mp, &mp->mnt_stat, td);
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return (0);
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}
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/*
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* Reload all incore data for a filesystem (used after running fsck on
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* the root filesystem and finding things to fix). The filesystem must
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* be mounted read-only.
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*
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* Things to do to update the mount:
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* 1) invalidate all cached meta-data.
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* 2) re-read superblock from disk.
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* 3) re-read summary information from disk.
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* 4) invalidate all inactive vnodes.
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* 5) invalidate all cached file data.
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* 6) re-read inode data for all active vnodes.
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*/
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int
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ffs_reload(mp, cred, td)
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register struct mount *mp;
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struct ucred *cred;
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struct thread *td;
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{
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register struct vnode *vp, *nvp, *devvp;
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struct inode *ip;
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void *space;
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struct buf *bp;
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struct fs *fs, *newfs;
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struct partinfo dpart;
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dev_t dev;
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int i, blks, size, error;
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int32_t *lp;
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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return (EINVAL);
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/*
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* Step 1: invalidate all cached meta-data.
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*/
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devvp = VFSTOUFS(mp)->um_devvp;
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = vinvalbuf(devvp, 0, cred, td, 0, 0);
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VOP_UNLOCK(devvp, 0, td);
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if (error)
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panic("ffs_reload: dirty1");
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dev = devvp->v_rdev;
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/*
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* Only VMIO the backing device if the backing device is a real
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* block device.
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*/
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if (vn_isdisk(devvp, NULL)) {
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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vfs_object_create(devvp, td, td->td_proc->p_ucred);
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mtx_lock(&devvp->v_interlock);
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VOP_UNLOCK(devvp, LK_INTERLOCK, td);
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}
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/*
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* Step 2: re-read superblock from disk.
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*/
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if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0)
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size = DEV_BSIZE;
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else
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size = dpart.disklab->d_secsize;
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if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, NOCRED,&bp)) != 0)
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return (error);
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newfs = (struct fs *)bp->b_data;
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if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE ||
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newfs->fs_bsize < sizeof(struct fs)) {
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brelse(bp);
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return (EIO); /* XXX needs translation */
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}
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fs = VFSTOUFS(mp)->um_fs;
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/*
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* Copy pointer fields back into superblock before copying in XXX
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* new superblock. These should really be in the ufsmount. XXX
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* Note that important parameters (eg fs_ncg) are unchanged.
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*/
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newfs->fs_csp = fs->fs_csp;
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newfs->fs_maxcluster = fs->fs_maxcluster;
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newfs->fs_contigdirs = fs->fs_contigdirs;
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bcopy(newfs, fs, (u_int)fs->fs_sbsize);
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if (fs->fs_sbsize < SBSIZE)
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bp->b_flags |= B_INVAL | B_NOCACHE;
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brelse(bp);
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mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
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ffs_oldfscompat(fs);
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/* An old fsck may have zeroed these fields, so recheck them. */
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if (fs->fs_avgfilesize <= 0) /* XXX */
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fs->fs_avgfilesize = AVFILESIZ; /* XXX */
|
|
if (fs->fs_avgfpdir <= 0) /* XXX */
|
|
fs->fs_avgfpdir = AFPDIR; /* XXX */
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: reload pending error: blocks %d files %d\n",
|
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fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
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fs->fs_pendingblocks = 0;
|
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fs->fs_pendinginodes = 0;
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}
|
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|
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/*
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* Step 3: re-read summary information from disk.
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*/
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blks = howmany(fs->fs_cssize, fs->fs_fsize);
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space = fs->fs_csp;
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for (i = 0; i < blks; i += fs->fs_frag) {
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size = fs->fs_bsize;
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if (i + fs->fs_frag > blks)
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size = (blks - i) * fs->fs_fsize;
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error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
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NOCRED, &bp);
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if (error)
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return (error);
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bcopy(bp->b_data, space, (u_int)size);
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space = (char *)space + size;
|
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brelse(bp);
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}
|
|
/*
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|
* We no longer know anything about clusters per cylinder group.
|
|
*/
|
|
if (fs->fs_contigsumsize > 0) {
|
|
lp = fs->fs_maxcluster;
|
|
for (i = 0; i < fs->fs_ncg; i++)
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*lp++ = fs->fs_contigsumsize;
|
|
}
|
|
|
|
loop:
|
|
mtx_lock(&mntvnode_mtx);
|
|
for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
|
|
if (vp->v_mount != mp) {
|
|
mtx_unlock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
nvp = LIST_NEXT(vp, v_mntvnodes);
|
|
mtx_unlock(&mntvnode_mtx);
|
|
/*
|
|
* Step 4: invalidate all inactive vnodes.
|
|
*/
|
|
if (vrecycle(vp, NULL, td))
|
|
goto loop;
|
|
/*
|
|
* Step 5: invalidate all cached file data.
|
|
*/
|
|
mtx_lock(&vp->v_interlock);
|
|
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
|
|
goto loop;
|
|
}
|
|
if (vinvalbuf(vp, 0, cred, td, 0, 0))
|
|
panic("ffs_reload: dirty2");
|
|
/*
|
|
* Step 6: re-read inode data for all active vnodes.
|
|
*/
|
|
ip = VTOI(vp);
|
|
error =
|
|
bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data +
|
|
ino_to_fsbo(fs, ip->i_number));
|
|
ip->i_effnlink = ip->i_nlink;
|
|
brelse(bp);
|
|
vput(vp);
|
|
mtx_lock(&mntvnode_mtx);
|
|
}
|
|
mtx_unlock(&mntvnode_mtx);
|
|
return (0);
|
|
}
|
|
|
|
#include <sys/sysctl.h>
|
|
int bigcgs = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, "");
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
int
|
|
ffs_mountfs(devvp, mp, td, malloctype)
|
|
register struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct thread *td;
|
|
struct malloc_type *malloctype;
|
|
{
|
|
register struct ufsmount *ump;
|
|
struct buf *bp;
|
|
register struct fs *fs;
|
|
dev_t dev;
|
|
struct partinfo dpart;
|
|
void *space;
|
|
int error, i, blks, size, ronly;
|
|
int32_t *lp;
|
|
struct ucred *cred;
|
|
u_int64_t maxfilesize; /* XXX */
|
|
size_t strsize;
|
|
int ncount;
|
|
|
|
dev = devvp->v_rdev;
|
|
cred = td ? td->td_proc->p_ucred : NOCRED;
|
|
/*
|
|
* Disallow multiple mounts of the same device.
|
|
* Disallow mounting of a device that is currently in use
|
|
* (except for root, which might share swap device for miniroot).
|
|
* Flush out any old buffers remaining from a previous use.
|
|
*/
|
|
error = vfs_mountedon(devvp);
|
|
if (error)
|
|
return (error);
|
|
ncount = vcount(devvp);
|
|
|
|
if (ncount > 1 && devvp != rootvp)
|
|
return (EBUSY);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0);
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Only VMIO the backing device if the backing device is a real
|
|
* block device.
|
|
* Note that it is optional that the backing device be VMIOed. This
|
|
* increases the opportunity for metadata caching.
|
|
*/
|
|
if (vn_isdisk(devvp, NULL)) {
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
vfs_object_create(devvp, td, cred);
|
|
mtx_lock(&devvp->v_interlock);
|
|
VOP_UNLOCK(devvp, LK_INTERLOCK, td);
|
|
}
|
|
|
|
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td);
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
return (error);
|
|
if (devvp->v_rdev->si_iosize_max > mp->mnt_iosize_max)
|
|
mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
|
|
if (mp->mnt_iosize_max > MAXPHYS)
|
|
mp->mnt_iosize_max = MAXPHYS;
|
|
|
|
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred, td) != 0)
|
|
size = DEV_BSIZE;
|
|
else
|
|
size = dpart.disklab->d_secsize;
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
if ((error = bread(devvp, SBLOCK, SBSIZE, cred, &bp)) != 0)
|
|
goto out;
|
|
fs = (struct fs *)bp->b_data;
|
|
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
|
|
fs->fs_bsize < sizeof(struct fs)) {
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
fs->fs_fmod = 0;
|
|
fs->fs_flags &= ~FS_UNCLEAN;
|
|
if (fs->fs_clean == 0) {
|
|
fs->fs_flags |= FS_UNCLEAN;
|
|
if (ronly || (mp->mnt_flag & MNT_FORCE) ||
|
|
((fs->fs_flags & FS_NEEDSFSCK) == 0 &&
|
|
(fs->fs_flags & FS_DOSOFTDEP))) {
|
|
printf(
|
|
"WARNING: %s was not properly dismounted\n",
|
|
fs->fs_fsmnt);
|
|
} else {
|
|
printf(
|
|
"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
|
|
fs->fs_fsmnt);
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: lost blocks %d files %d\n", fs->fs_fsmnt,
|
|
fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: mount pending error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
/* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
|
|
error = EROFS; /* needs translation */
|
|
goto out;
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO);
|
|
ump->um_malloctype = malloctype;
|
|
ump->um_i_effnlink_valid = 1;
|
|
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
|
|
M_WAITOK);
|
|
ump->um_blkatoff = ffs_blkatoff;
|
|
ump->um_truncate = ffs_truncate;
|
|
ump->um_update = ffs_update;
|
|
ump->um_valloc = ffs_valloc;
|
|
ump->um_vfree = ffs_vfree;
|
|
ump->um_balloc = ffs_balloc;
|
|
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
fs = ump->um_fs;
|
|
fs->fs_ronly = ronly;
|
|
size = fs->fs_cssize;
|
|
blks = howmany(size, fs->fs_fsize);
|
|
if (fs->fs_contigsumsize > 0)
|
|
size += fs->fs_ncg * sizeof(int32_t);
|
|
size += fs->fs_ncg * sizeof(u_int8_t);
|
|
space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
|
|
fs->fs_csp = space;
|
|
for (i = 0; i < blks; i += fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
|
|
cred, &bp)) != 0) {
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
space = (char *)space + size;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
if (fs->fs_contigsumsize > 0) {
|
|
fs->fs_maxcluster = lp = space;
|
|
for (i = 0; i < fs->fs_ncg; i++)
|
|
*lp++ = fs->fs_contigsumsize;
|
|
space = lp;
|
|
}
|
|
size = fs->fs_ncg * sizeof(u_int8_t);
|
|
fs->fs_contigdirs = (u_int8_t *)space;
|
|
bzero(fs->fs_contigdirs, size);
|
|
/* Compatibility for old filesystems XXX */
|
|
if (fs->fs_avgfilesize <= 0) /* XXX */
|
|
fs->fs_avgfilesize = AVFILESIZ; /* XXX */
|
|
if (fs->fs_avgfpdir <= 0) /* XXX */
|
|
fs->fs_avgfpdir = AFPDIR; /* XXX */
|
|
mp->mnt_data = (qaddr_t)ump;
|
|
mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
|
|
mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
|
|
if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
|
|
vfs_getvfs(&mp->mnt_stat.f_fsid))
|
|
vfs_getnewfsid(mp);
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
ump->um_mountp = mp;
|
|
ump->um_dev = dev;
|
|
ump->um_devvp = devvp;
|
|
ump->um_nindir = fs->fs_nindir;
|
|
ump->um_bptrtodb = fs->fs_fsbtodb;
|
|
ump->um_seqinc = fs->fs_frag;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ump->um_quotas[i] = NULLVP;
|
|
#ifdef UFS_EXTATTR
|
|
ufs_extattr_uepm_init(&ump->um_extattr);
|
|
#endif
|
|
devvp->v_rdev->si_mountpoint = mp;
|
|
ffs_oldfscompat(fs);
|
|
|
|
/*
|
|
* Set FS local "last mounted on" information (NULL pad)
|
|
*/
|
|
copystr( mp->mnt_stat.f_mntonname, /* mount point*/
|
|
fs->fs_fsmnt, /* copy area*/
|
|
sizeof(fs->fs_fsmnt) - 1, /* max size*/
|
|
&strsize); /* real size*/
|
|
bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize);
|
|
|
|
if( mp->mnt_flag & MNT_ROOTFS) {
|
|
/*
|
|
* Root mount; update timestamp in mount structure.
|
|
* this will be used by the common root mount code
|
|
* to update the system clock.
|
|
*/
|
|
mp->mnt_time = fs->fs_time;
|
|
}
|
|
|
|
ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
|
|
maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */
|
|
if (fs->fs_maxfilesize > maxfilesize) /* XXX */
|
|
fs->fs_maxfilesize = maxfilesize; /* XXX */
|
|
if (bigcgs) {
|
|
if (fs->fs_sparecon[0] <= 0)
|
|
fs->fs_sparecon[0] = fs->fs_cgsize;
|
|
fs->fs_cgsize = fs->fs_bsize;
|
|
}
|
|
if (ronly == 0) {
|
|
if ((fs->fs_flags & FS_DOSOFTDEP) &&
|
|
(error = softdep_mount(devvp, mp, fs, cred)) != 0) {
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
if (fs->fs_snapinum[0] != 0)
|
|
ffs_snapshot_mount(mp);
|
|
fs->fs_fmod = 1;
|
|
fs->fs_clean = 0;
|
|
(void) ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
#ifdef UFS_EXTATTR
|
|
#ifdef UFS_EXTATTR_AUTOSTART
|
|
/*
|
|
*
|
|
* Auto-starting does the following:
|
|
* - check for /.attribute in the fs, and extattr_start if so
|
|
* - for each file in .attribute, enable that file with
|
|
* an attribute of the same name.
|
|
* Not clear how to report errors -- probably eat them.
|
|
* This would all happen while the file system was busy/not
|
|
* available, so would effectively be "atomic".
|
|
*/
|
|
(void) ufs_extattr_autostart(mp, td);
|
|
#endif /* !UFS_EXTATTR_AUTOSTART */
|
|
#endif /* !UFS_EXTATTR */
|
|
return (0);
|
|
out:
|
|
devvp->v_rdev->si_mountpoint = NULL;
|
|
if (bp)
|
|
brelse(bp);
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td);
|
|
if (ump) {
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sanity checks for old file systems.
|
|
*
|
|
* XXX - goes away some day.
|
|
*/
|
|
static int
|
|
ffs_oldfscompat(fs)
|
|
struct fs *fs;
|
|
{
|
|
|
|
fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
|
|
fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
fs->fs_nrpos = 8; /* XXX */
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
#if 0
|
|
int i; /* XXX */
|
|
u_int64_t sizepb = fs->fs_bsize; /* XXX */
|
|
/* XXX */
|
|
fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
|
|
for (i = 0; i < NIADDR; i++) { /* XXX */
|
|
sizepb *= NINDIR(fs); /* XXX */
|
|
fs->fs_maxfilesize += sizepb; /* XXX */
|
|
} /* XXX */
|
|
#endif
|
|
fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
|
|
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
|
|
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
|
|
} /* XXX */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
int
|
|
ffs_unmount(mp, mntflags, td)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct thread *td;
|
|
{
|
|
register struct ufsmount *ump = VFSTOUFS(mp);
|
|
register struct fs *fs;
|
|
int error, flags;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
}
|
|
#ifdef UFS_EXTATTR
|
|
if ((error = ufs_extattr_stop(mp, td))) {
|
|
if (error != EOPNOTSUPP)
|
|
printf("ffs_unmount: ufs_extattr_stop returned %d\n",
|
|
error);
|
|
} else {
|
|
ufs_extattr_uepm_destroy(&ump->um_extattr);
|
|
}
|
|
#endif
|
|
if (mp->mnt_flag & MNT_SOFTDEP) {
|
|
if ((error = softdep_flushfiles(mp, flags, td)) != 0)
|
|
return (error);
|
|
} else {
|
|
if ((error = ffs_flushfiles(mp, flags, td)) != 0)
|
|
return (error);
|
|
}
|
|
fs = ump->um_fs;
|
|
if (bigcgs) {
|
|
fs->fs_cgsize = fs->fs_sparecon[0];
|
|
fs->fs_sparecon[0] = 0;
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: unmount pending error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
if (fs->fs_ronly == 0) {
|
|
fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1;
|
|
error = ffs_sbupdate(ump, MNT_WAIT);
|
|
if (error) {
|
|
fs->fs_clean = 0;
|
|
return (error);
|
|
}
|
|
}
|
|
ump->um_devvp->v_rdev->si_mountpoint = NULL;
|
|
|
|
vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0);
|
|
error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, td);
|
|
|
|
vrele(ump->um_devvp);
|
|
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
free(fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush out all the files in a filesystem.
|
|
*/
|
|
int
|
|
ffs_flushfiles(mp, flags, td)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct thread *td;
|
|
{
|
|
register struct ufsmount *ump;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
int i;
|
|
error = vflush(mp, 0, SKIPSYSTEM|flags);
|
|
if (error)
|
|
return (error);
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (ump->um_quotas[i] == NULLVP)
|
|
continue;
|
|
quotaoff(td, mp, i);
|
|
}
|
|
/*
|
|
* Here we fall through to vflush again to ensure
|
|
* that we have gotten rid of all the system vnodes.
|
|
*/
|
|
}
|
|
#endif
|
|
if (ump->um_devvp->v_flag & VCOPYONWRITE) {
|
|
if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0)
|
|
return (error);
|
|
ffs_snapshot_unmount(mp);
|
|
/*
|
|
* Here we fall through to vflush again to ensure
|
|
* that we have gotten rid of all the system vnodes.
|
|
*/
|
|
}
|
|
/*
|
|
* Flush all the files.
|
|
*/
|
|
if ((error = vflush(mp, 0, flags)) != 0)
|
|
return (error);
|
|
/*
|
|
* Flush filesystem metadata.
|
|
*/
|
|
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = VOP_FSYNC(ump->um_devvp, td->td_proc->p_ucred, MNT_WAIT, td);
|
|
VOP_UNLOCK(ump->um_devvp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
ffs_statfs(mp, sbp, td)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct thread *td;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct fs *fs;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
if (fs->fs_magic != FS_MAGIC)
|
|
panic("ffs_statfs");
|
|
sbp->f_bsize = fs->fs_fsize;
|
|
sbp->f_iosize = fs->fs_bsize;
|
|
sbp->f_blocks = fs->fs_dsize;
|
|
sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
|
|
fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks);
|
|
sbp->f_bavail = freespace(fs, fs->fs_minfree) +
|
|
dbtofsb(fs, fs->fs_pendingblocks);
|
|
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
|
|
sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
|
|
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
|
|
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Go through the disk queues to initiate sandbagged IO;
|
|
* go through the inodes to write those that have been modified;
|
|
* initiate the writing of the super block if it has been modified.
|
|
*
|
|
* Note: we are always called with the filesystem marked `MPBUSY'.
|
|
*/
|
|
int
|
|
ffs_sync(mp, waitfor, cred, td)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *nvp, *vp, *devvp;
|
|
struct inode *ip;
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
struct fs *fs;
|
|
int error, count, wait, lockreq, allerror = 0;
|
|
|
|
fs = ump->um_fs;
|
|
if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
|
|
printf("fs = %s\n", fs->fs_fsmnt);
|
|
panic("ffs_sync: rofs mod");
|
|
}
|
|
/*
|
|
* Write back each (modified) inode.
|
|
*/
|
|
wait = 0;
|
|
lockreq = LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK;
|
|
if (waitfor == MNT_WAIT) {
|
|
wait = 1;
|
|
lockreq = LK_EXCLUSIVE | LK_INTERLOCK;
|
|
}
|
|
mtx_lock(&mntvnode_mtx);
|
|
loop:
|
|
for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
|
|
/*
|
|
* 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;
|
|
nvp = LIST_NEXT(vp, v_mntvnodes);
|
|
|
|
mtx_unlock(&mntvnode_mtx);
|
|
mtx_lock(&vp->v_interlock);
|
|
ip = VTOI(vp);
|
|
if (vp->v_type == VNON || ((ip->i_flag &
|
|
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
|
|
TAILQ_EMPTY(&vp->v_dirtyblkhd))) {
|
|
mtx_unlock(&vp->v_interlock);
|
|
mtx_lock(&mntvnode_mtx);
|
|
continue;
|
|
}
|
|
if (vp->v_type != VCHR) {
|
|
if ((error = vget(vp, lockreq, td)) != 0) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
if (error == ENOENT)
|
|
goto loop;
|
|
continue;
|
|
}
|
|
if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vrele(vp);
|
|
} else {
|
|
mtx_unlock(&vp->v_interlock);
|
|
UFS_UPDATE(vp, wait);
|
|
}
|
|
mtx_lock(&mntvnode_mtx);
|
|
}
|
|
mtx_unlock(&mntvnode_mtx);
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
if (waitfor == MNT_WAIT) {
|
|
if ((error = softdep_flushworklist(ump->um_mountp, &count, td)))
|
|
allerror = error;
|
|
/* Flushed work items may create new vnodes to clean */
|
|
if (count) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
}
|
|
#ifdef QUOTA
|
|
qsync(mp);
|
|
#endif
|
|
devvp = ump->um_devvp;
|
|
mtx_lock(&devvp->v_interlock);
|
|
if (waitfor != MNT_LAZY &&
|
|
(devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) {
|
|
mtx_unlock(&devvp->v_interlock);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (waitfor == MNT_WAIT) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
} else
|
|
mtx_unlock(&devvp->v_interlock);
|
|
/*
|
|
* Write back modified superblock.
|
|
*/
|
|
if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* Look up a FFS dinode number to find its incore vnode, otherwise read it
|
|
* in from disk. If it is in core, wait for the lock bit to clear, then
|
|
* return the inode locked. Detection and handling of mount points must be
|
|
* done by the calling routine.
|
|
*/
|
|
static int ffs_inode_hash_lock;
|
|
/*
|
|
* ffs_inode_hash_lock is a variable to manage mutual exclusion
|
|
* of vnode allocation and intertion to the hash, especially to
|
|
* avoid holding more than one vnodes for the same inode in the
|
|
* hash table. ffs_inode_hash_lock must hence be tested-and-set
|
|
* or cleared atomically, accomplished by ffs_inode_hash_mtx.
|
|
*
|
|
* As vnode allocation may block during MALLOC() and zone
|
|
* allocation, we should also do msleep() to give away the CPU
|
|
* if anyone else is allocating a vnode. lockmgr is not suitable
|
|
* here because someone else may insert to the hash table the
|
|
* vnode we are trying to allocate during our sleep, in which
|
|
* case the hash table needs to be examined once again after
|
|
* waking up.
|
|
*/
|
|
static struct mtx ffs_inode_hash_mtx;
|
|
|
|
int
|
|
ffs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
struct fs *fs;
|
|
struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int error, want_wakeup;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
restart:
|
|
if ((*vpp = ufs_ihashget(dev, ino)) != NULL) {
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Lock out the creation of new entries in the FFS hash table in
|
|
* case getnewvnode() or MALLOC() blocks, otherwise a duplicate
|
|
* may occur!
|
|
*/
|
|
mtx_lock(&ffs_inode_hash_mtx);
|
|
if (ffs_inode_hash_lock) {
|
|
while (ffs_inode_hash_lock) {
|
|
ffs_inode_hash_lock = -1;
|
|
msleep(&ffs_inode_hash_lock, &ffs_inode_hash_mtx, PVM, "ffsvgt", 0);
|
|
}
|
|
mtx_unlock(&ffs_inode_hash_mtx);
|
|
goto restart;
|
|
}
|
|
ffs_inode_hash_lock = 1;
|
|
mtx_unlock(&ffs_inode_hash_mtx);
|
|
|
|
/*
|
|
* If this MALLOC() is performed after the getnewvnode()
|
|
* it might block, leaving a vnode with a NULL v_data to be
|
|
* found by ffs_sync() if a sync happens to fire right then,
|
|
* which will cause a panic because ffs_sync() blindly
|
|
* dereferences vp->v_data (as well it should).
|
|
*/
|
|
MALLOC(ip, struct inode *, sizeof(struct inode),
|
|
ump->um_malloctype, M_WAITOK);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
|
|
if (error) {
|
|
/*
|
|
* Do not wake up processes while holding the mutex,
|
|
* otherwise the processes waken up immediately hit
|
|
* themselves into the mutex.
|
|
*/
|
|
mtx_lock(&ffs_inode_hash_mtx);
|
|
want_wakeup = ffs_inode_hash_lock < 0;
|
|
ffs_inode_hash_lock = 0;
|
|
mtx_unlock(&ffs_inode_hash_mtx);
|
|
if (want_wakeup)
|
|
wakeup(&ffs_inode_hash_lock);
|
|
*vpp = NULL;
|
|
FREE(ip, ump->um_malloctype);
|
|
return (error);
|
|
}
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
/*
|
|
* FFS supports lock sharing in the stack of vnodes
|
|
*/
|
|
vp->v_vnlock = &vp->v_lock;
|
|
lockinit(vp->v_vnlock, PINOD, "inode", 0, LK_CANRECURSE);
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_fs = fs = ump->um_fs;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
#ifdef QUOTA
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ip->i_dquot[i] = NODQUOT;
|
|
}
|
|
#endif
|
|
/*
|
|
* Put it onto its hash chain and lock it so that other requests for
|
|
* this inode will block if they arrive while we are sleeping waiting
|
|
* for old data structures to be purged or for the contents of the
|
|
* disk portion of this inode to be read.
|
|
*/
|
|
ufs_ihashins(ip);
|
|
|
|
/*
|
|
* Do not wake up processes while holding the mutex,
|
|
* otherwise the processes waken up immediately hit
|
|
* themselves into the mutex.
|
|
*/
|
|
mtx_lock(&ffs_inode_hash_mtx);
|
|
want_wakeup = ffs_inode_hash_lock < 0;
|
|
ffs_inode_hash_lock = 0;
|
|
mtx_unlock(&ffs_inode_hash_mtx);
|
|
if (want_wakeup)
|
|
wakeup(&ffs_inode_hash_lock);
|
|
|
|
/* Read in the disk contents for the inode, copy into the inode. */
|
|
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
/*
|
|
* The inode does not contain anything useful, so it would
|
|
* be misleading to leave it on its hash chain. With mode
|
|
* still zero, it will be unlinked and returned to the free
|
|
* list by vput().
|
|
*/
|
|
brelse(bp);
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_load_inodeblock(ip);
|
|
else
|
|
ip->i_effnlink = ip->i_nlink;
|
|
bqrelse(bp);
|
|
|
|
/*
|
|
* Initialize the vnode from the inode, check for aliases.
|
|
* Note that the underlying vnode may have changed.
|
|
*/
|
|
error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
|
|
if (error) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
/*
|
|
* Finish inode initialization now that aliasing has been resolved.
|
|
*/
|
|
ip->i_devvp = ump->um_devvp;
|
|
VREF(ip->i_devvp);
|
|
/*
|
|
* Set up a generation number for this inode if it does not
|
|
* already have one. This should only happen on old filesystems.
|
|
*/
|
|
if (ip->i_gen == 0) {
|
|
ip->i_gen = random() / 2 + 1;
|
|
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
|
|
ip->i_flag |= IN_MODIFIED;
|
|
}
|
|
/*
|
|
* Ensure that uid and gid are correct. This is a temporary
|
|
* fix until fsck has been changed to do the update.
|
|
*/
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
ip->i_uid = ip->i_din.di_ouid; /* XXX */
|
|
ip->i_gid = ip->i_din.di_ogid; /* XXX */
|
|
} /* XXX */
|
|
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* File handle to vnode
|
|
*
|
|
* Have to be really careful about stale file handles:
|
|
* - check that the inode number is valid
|
|
* - call ffs_vget() to get the locked inode
|
|
* - check for an unallocated inode (i_mode == 0)
|
|
* - check that the given client host has export rights and return
|
|
* those rights via. exflagsp and credanonp
|
|
*/
|
|
int
|
|
ffs_fhtovp(mp, fhp, vpp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct ufid *ufhp;
|
|
struct fs *fs;
|
|
|
|
ufhp = (struct ufid *)fhp;
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
if (ufhp->ufid_ino < ROOTINO ||
|
|
ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
|
|
return (ESTALE);
|
|
return (ufs_fhtovp(mp, ufhp, vpp));
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ffs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
register struct inode *ip;
|
|
register struct ufid *ufhp;
|
|
|
|
ip = VTOI(vp);
|
|
ufhp = (struct ufid *)fhp;
|
|
ufhp->ufid_len = sizeof(struct ufid);
|
|
ufhp->ufid_ino = ip->i_number;
|
|
ufhp->ufid_gen = ip->i_gen;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initialize the filesystem; just use ufs_init.
|
|
*/
|
|
static int
|
|
ffs_init(vfsp)
|
|
struct vfsconf *vfsp;
|
|
{
|
|
|
|
softdep_initialize();
|
|
mtx_init(&ffs_inode_hash_mtx, "ifsvgt", MTX_DEF);
|
|
return (ufs_init(vfsp));
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
static int
|
|
ffs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
register struct fs *dfs, *fs = mp->um_fs;
|
|
register struct buf *bp;
|
|
int blks;
|
|
void *space;
|
|
int i, size, error, allerror = 0;
|
|
|
|
/*
|
|
* First write back the summary information.
|
|
*/
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = fs->fs_csp;
|
|
for (i = 0; i < blks; i += fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
|
|
size, 0, 0);
|
|
bcopy(space, bp->b_data, (u_int)size);
|
|
space = (char *)space + size;
|
|
if (waitfor != MNT_WAIT)
|
|
bawrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
allerror = error;
|
|
}
|
|
/*
|
|
* Now write back the superblock itself. If any errors occurred
|
|
* up to this point, then fail so that the superblock avoids
|
|
* being written out as clean.
|
|
*/
|
|
if (allerror)
|
|
return (allerror);
|
|
bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time_second;
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
/* Restore compatibility to old file systems. XXX */
|
|
dfs = (struct fs *)bp->b_data; /* XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
dfs->fs_nrpos = -1; /* XXX */
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
int32_t *lp, tmp; /* XXX */
|
|
/* XXX */
|
|
lp = (int32_t *)&dfs->fs_qbmask; /* XXX */
|
|
tmp = lp[4]; /* XXX */
|
|
for (i = 4; i > 0; i--) /* XXX */
|
|
lp[i] = lp[i-1]; /* XXX */
|
|
lp[0] = tmp; /* XXX */
|
|
} /* XXX */
|
|
dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */
|
|
if (waitfor != MNT_WAIT)
|
|
bawrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|