1527 lines
40 KiB
C
1527 lines
40 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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* 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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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/mac.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/disk.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/uma.h>
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#include <vm/vm_page.h>
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uma_zone_t uma_inode, uma_ufs1, uma_ufs2;
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static int ffs_sbupdate(struct ufsmount *, int);
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static int ffs_reload(struct mount *, struct thread *);
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static int ffs_mountfs(struct vnode *, struct mount *, struct thread *);
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static void ffs_oldfscompat_read(struct fs *, struct ufsmount *,
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ufs2_daddr_t);
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static void ffs_oldfscompat_write(struct fs *, struct ufsmount *);
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static void ffs_ifree(struct ufsmount *ump, struct inode *ip);
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static vfs_init_t ffs_init;
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static vfs_uninit_t ffs_uninit;
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static vfs_extattrctl_t ffs_extattrctl;
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static vfs_omount_t ffs_omount;
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static struct vfsops ufs_vfsops = {
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.vfs_extattrctl = ffs_extattrctl,
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.vfs_fhtovp = ffs_fhtovp,
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.vfs_init = ffs_init,
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.vfs_omount = ffs_omount,
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.vfs_quotactl = ufs_quotactl,
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.vfs_root = ufs_root,
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.vfs_start = ufs_start,
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.vfs_statfs = ffs_statfs,
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.vfs_sync = ffs_sync,
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.vfs_uninit = ffs_uninit,
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.vfs_unmount = ffs_unmount,
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.vfs_vget = ffs_vget,
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.vfs_vptofh = ffs_vptofh,
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};
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VFS_SET(ufs_vfsops, ufs, 0);
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/*
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* ffs_omount
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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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static int
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ffs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td)
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{
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size_t size;
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struct vnode *devvp, *rootvp;
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struct ufs_args args;
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struct ufsmount *ump = 0;
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struct fs *fs;
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int error, flags;
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mode_t accessmode;
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struct nameidata ndp;
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if (uma_inode == NULL) {
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uma_inode = uma_zcreate("FFS inode",
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sizeof(struct inode), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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uma_ufs1 = uma_zcreate("FFS1 dinode",
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sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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uma_ufs2 = uma_zcreate("FFS2 dinode",
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sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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}
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/*
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* Use NULL path to indicate we are mounting the root filesystem.
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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)) != 0)
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return (error);
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return (0);
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}
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/*
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* Mounting non-root filesystem or updating a filesystem
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*/
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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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/*
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* Flush any dirty data.
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*/
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if ((error = VFS_SYNC(mp, MNT_WAIT,
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td->td_ucred, td)) != 0) {
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vn_finished_write(mp);
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return (error);
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}
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/*
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* Check for and optionally get rid of files open
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* for writing.
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*/
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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: %s: blocks %jd files %d\n",
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fs->fs_fsmnt, "update error",
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(intmax_t)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, 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)) {
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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_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_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 disk 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)) {
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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_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)) != 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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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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static int
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ffs_reload(struct mount *mp, struct thread *td)
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{
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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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ufs2_daddr_t sblockloc;
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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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if (vinvalbuf(devvp, 0, td->td_ucred, td, 0, 0) != 0)
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panic("ffs_reload: dirty1");
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/*
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* Only VMIO the backing device if the backing device is a real
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* disk device. See ffs_mountfs() for more details.
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*/
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if (vn_isdisk(devvp, NULL))
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vfs_object_create(devvp, td, td->td_ucred);
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VOP_UNLOCK(devvp, 0, td);
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/*
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* Step 2: re-read superblock from disk.
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*/
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fs = VFSTOUFS(mp)->um_fs;
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if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize,
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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_UFS1_MAGIC &&
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newfs->fs_magic != FS_UFS2_MAGIC) ||
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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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/*
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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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newfs->fs_active = fs->fs_active;
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/* The file system is still read-only. */
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newfs->fs_ronly = 1;
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sblockloc = fs->fs_sblockloc;
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bcopy(newfs, fs, (u_int)fs->fs_sbsize);
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brelse(bp);
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mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
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ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc);
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if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
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printf("%s: reload pending error: blocks %jd files %d\n",
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fs->fs_fsmnt, (intmax_t)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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/*
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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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/*
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* We no longer know anything about clusters per cylinder group.
|
|
*/
|
|
if (fs->fs_contigsumsize > 0) {
|
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lp = fs->fs_maxcluster;
|
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for (i = 0; i < fs->fs_ncg; i++)
|
|
*lp++ = fs->fs_contigsumsize;
|
|
}
|
|
|
|
loop:
|
|
MNT_ILOCK(mp);
|
|
MNT_VNODE_FOREACH(vp, mp, nvp) {
|
|
VI_LOCK(vp);
|
|
if (vp->v_iflag & VI_XLOCK) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
/*
|
|
* Step 4: invalidate all inactive vnodes.
|
|
*/
|
|
if (vp->v_usecount == 0) {
|
|
vgonel(vp, td);
|
|
goto loop;
|
|
}
|
|
/*
|
|
* Step 5: invalidate all cached file data.
|
|
*/
|
|
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
|
|
goto loop;
|
|
}
|
|
if (vinvalbuf(vp, 0, td->td_ucred, 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) {
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
ffs_load_inode(bp, ip, fs, ip->i_number);
|
|
ip->i_effnlink = ip->i_nlink;
|
|
brelse(bp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vrele(vp);
|
|
MNT_ILOCK(mp);
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Possible superblock locations ordered from most to least likely.
|
|
*/
|
|
static int sblock_try[] = SBLOCKSEARCH;
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
static int
|
|
ffs_mountfs(devvp, mp, td)
|
|
struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct fs *fs;
|
|
struct cdev *dev;
|
|
void *space;
|
|
ufs2_daddr_t sblockloc;
|
|
int error, i, blks, size, ronly;
|
|
int32_t *lp;
|
|
struct ucred *cred;
|
|
size_t strsize;
|
|
|
|
dev = devvp->v_rdev;
|
|
cred = td ? td->td_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);
|
|
if (vcount(devvp) > 1)
|
|
return (EBUSY);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0);
|
|
if (error) {
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Only VMIO the backing device if the backing device is a real
|
|
* disk device.
|
|
* Note that it is optional that the backing device be VMIOed. This
|
|
* increases the opportunity for metadata caching.
|
|
*/
|
|
if (vn_isdisk(devvp, NULL))
|
|
vfs_object_create(devvp, td, cred);
|
|
|
|
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
/*
|
|
* XXX: open the device with read and write access even if only
|
|
* read access is needed now. Write access is needed if the
|
|
* filesystem is ever mounted read/write, and we don't change the
|
|
* access mode for remounts.
|
|
*/
|
|
#ifdef notyet
|
|
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD | FWRITE, FSCRED, td, -1);
|
|
#else
|
|
error = VOP_OPEN(devvp, FREAD | FWRITE, FSCRED, td, -1);
|
|
#endif
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
return (error);
|
|
if (devvp->v_rdev->si_iosize_max != 0)
|
|
mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
|
|
if (mp->mnt_iosize_max > MAXPHYS)
|
|
mp->mnt_iosize_max = MAXPHYS;
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
fs = NULL;
|
|
sblockloc = 0;
|
|
/*
|
|
* Try reading the superblock in each of its possible locations.
|
|
*/
|
|
for (i = 0; sblock_try[i] != -1; i++) {
|
|
if ((error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE,
|
|
cred, &bp)) != 0)
|
|
goto out;
|
|
fs = (struct fs *)bp->b_data;
|
|
sblockloc = sblock_try[i];
|
|
if ((fs->fs_magic == FS_UFS1_MAGIC ||
|
|
(fs->fs_magic == FS_UFS2_MAGIC &&
|
|
(fs->fs_sblockloc == sblockloc ||
|
|
(fs->fs_old_flags & FS_FLAGS_UPDATED) == 0))) &&
|
|
fs->fs_bsize <= MAXBSIZE &&
|
|
fs->fs_bsize >= sizeof(struct fs))
|
|
break;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
if (sblock_try[i] == -1) {
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
fs->fs_fmod = 0;
|
|
fs->fs_flags &= ~FS_INDEXDIRS; /* no support for directory indicies */
|
|
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) &&
|
|
(mp->mnt_flag & MNT_FORCE)) {
|
|
printf("%s: lost blocks %jd files %d\n", fs->fs_fsmnt,
|
|
(intmax_t)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 %jd files %d\n",
|
|
fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks,
|
|
fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO);
|
|
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
|
|
M_WAITOK);
|
|
if (fs->fs_magic == FS_UFS1_MAGIC) {
|
|
ump->um_fstype = UFS1;
|
|
ump->um_balloc = ffs_balloc_ufs1;
|
|
} else {
|
|
ump->um_fstype = UFS2;
|
|
ump->um_balloc = ffs_balloc_ufs2;
|
|
}
|
|
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_ifree = ffs_ifree;
|
|
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBLOCKSIZE)
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
fs = ump->um_fs;
|
|
ffs_oldfscompat_read(fs, ump, sblockloc);
|
|
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);
|
|
fs->fs_active = NULL;
|
|
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;
|
|
if ((fs->fs_flags & FS_MULTILABEL) != 0)
|
|
#ifdef MAC
|
|
mp->mnt_flag |= MNT_MULTILABEL;
|
|
#else
|
|
printf(
|
|
"WARNING: %s: multilabel flag on fs but no MAC support\n",
|
|
fs->fs_fsmnt);
|
|
#endif
|
|
if ((fs->fs_flags & FS_ACLS) != 0)
|
|
#ifdef UFS_ACL
|
|
mp->mnt_flag |= MNT_ACLS;
|
|
#else
|
|
printf(
|
|
"WARNING: %s: ACLs flag on fs but no ACLs support\n",
|
|
fs->fs_fsmnt);
|
|
#endif
|
|
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;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
/*
|
|
* Initialize filesystem stat information in mount struct.
|
|
*/
|
|
(void)VFS_STATFS(mp, &mp->mnt_stat, td);
|
|
#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 filesystem 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);
|
|
/* XXX: see comment above VOP_OPEN. */
|
|
#ifdef notyet
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE, cred, td);
|
|
#else
|
|
(void)VOP_CLOSE(devvp, FREAD | FWRITE, cred, td);
|
|
#endif
|
|
if (ump) {
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#include <sys/sysctl.h>
|
|
int bigcgs = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, "");
|
|
|
|
/*
|
|
* Sanity checks for loading old filesystem superblocks.
|
|
* See ffs_oldfscompat_write below for unwound actions.
|
|
*
|
|
* XXX - Parts get retired eventually.
|
|
* Unfortunately new bits get added.
|
|
*/
|
|
static void
|
|
ffs_oldfscompat_read(fs, ump, sblockloc)
|
|
struct fs *fs;
|
|
struct ufsmount *ump;
|
|
ufs2_daddr_t sblockloc;
|
|
{
|
|
off_t maxfilesize;
|
|
|
|
/*
|
|
* If not yet done, update fs_flags location and value of fs_sblockloc.
|
|
*/
|
|
if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) {
|
|
fs->fs_flags = fs->fs_old_flags;
|
|
fs->fs_old_flags |= FS_FLAGS_UPDATED;
|
|
fs->fs_sblockloc = sblockloc;
|
|
}
|
|
/*
|
|
* If not yet done, update UFS1 superblock with new wider fields.
|
|
*/
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) {
|
|
fs->fs_maxbsize = fs->fs_bsize;
|
|
fs->fs_time = fs->fs_old_time;
|
|
fs->fs_size = fs->fs_old_size;
|
|
fs->fs_dsize = fs->fs_old_dsize;
|
|
fs->fs_csaddr = fs->fs_old_csaddr;
|
|
fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir;
|
|
fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree;
|
|
fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree;
|
|
fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree;
|
|
}
|
|
if (fs->fs_magic == FS_UFS1_MAGIC &&
|
|
fs->fs_old_inodefmt < FS_44INODEFMT) {
|
|
fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
|
|
fs->fs_qbmask = ~fs->fs_bmask;
|
|
fs->fs_qfmask = ~fs->fs_fmask;
|
|
}
|
|
if (fs->fs_magic == FS_UFS1_MAGIC) {
|
|
ump->um_savedmaxfilesize = fs->fs_maxfilesize;
|
|
maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1;
|
|
if (fs->fs_maxfilesize > maxfilesize)
|
|
fs->fs_maxfilesize = maxfilesize;
|
|
}
|
|
/* Compatibility for old filesystems */
|
|
if (fs->fs_avgfilesize <= 0)
|
|
fs->fs_avgfilesize = AVFILESIZ;
|
|
if (fs->fs_avgfpdir <= 0)
|
|
fs->fs_avgfpdir = AFPDIR;
|
|
if (bigcgs) {
|
|
fs->fs_save_cgsize = fs->fs_cgsize;
|
|
fs->fs_cgsize = fs->fs_bsize;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Unwinding superblock updates for old filesystems.
|
|
* See ffs_oldfscompat_read above for details.
|
|
*
|
|
* XXX - Parts get retired eventually.
|
|
* Unfortunately new bits get added.
|
|
*/
|
|
static void
|
|
ffs_oldfscompat_write(fs, ump)
|
|
struct fs *fs;
|
|
struct ufsmount *ump;
|
|
{
|
|
|
|
/*
|
|
* Copy back UFS2 updated fields that UFS1 inspects.
|
|
*/
|
|
if (fs->fs_magic == FS_UFS1_MAGIC) {
|
|
fs->fs_old_time = fs->fs_time;
|
|
fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir;
|
|
fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree;
|
|
fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree;
|
|
fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree;
|
|
fs->fs_maxfilesize = ump->um_savedmaxfilesize;
|
|
}
|
|
if (bigcgs) {
|
|
fs->fs_cgsize = fs->fs_save_cgsize;
|
|
fs->fs_save_cgsize = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
int
|
|
ffs_unmount(mp, mntflags, td)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
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 (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: unmount pending error: blocks %jd files %d\n",
|
|
fs->fs_fsmnt, (intmax_t)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);
|
|
/* XXX: see comment above VOP_OPEN. */
|
|
#ifdef notyet
|
|
error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE,
|
|
NOCRED, td);
|
|
#else
|
|
error = VOP_CLOSE(ump->um_devvp, FREAD | FWRITE, NOCRED, td);
|
|
#endif
|
|
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)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
int i;
|
|
error = vflush(mp, 0, SKIPSYSTEM|flags, td);
|
|
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
|
|
ASSERT_VOP_LOCKED(ump->um_devvp, "ffs_flushfiles");
|
|
if (ump->um_devvp->v_vflag & VV_COPYONWRITE) {
|
|
if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 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, td)) != 0)
|
|
return (error);
|
|
/*
|
|
* Flush filesystem metadata.
|
|
*/
|
|
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td);
|
|
VOP_UNLOCK(ump->um_devvp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
int
|
|
ffs_statfs(mp, sbp, td)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump;
|
|
struct fs *fs;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC)
|
|
panic("ffs_statfs");
|
|
sbp->f_version = STATFS_VERSION;
|
|
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;
|
|
sbp->f_namemax = NAME_MAX;
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
sbp->f_syncwrites = mp->mnt_stat.f_syncwrites;
|
|
sbp->f_asyncwrites = mp->mnt_stat.f_asyncwrites;
|
|
sbp->f_syncreads = mp->mnt_stat.f_syncreads;
|
|
sbp->f_asyncreads = mp->mnt_stat.f_asyncreads;
|
|
sbp->f_owner = mp->mnt_stat.f_owner;
|
|
sbp->f_fsid = mp->mnt_stat.f_fsid;
|
|
bcopy((caddr_t)mp->mnt_stat.f_fstypename,
|
|
(caddr_t)&sbp->f_fstypename[0], MFSNAMELEN);
|
|
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;
|
|
if (waitfor == MNT_WAIT) {
|
|
wait = 1;
|
|
lockreq = LK_EXCLUSIVE;
|
|
}
|
|
lockreq |= LK_INTERLOCK;
|
|
MNT_ILOCK(mp);
|
|
loop:
|
|
MNT_VNODE_FOREACH(vp, mp, nvp) {
|
|
/*
|
|
* Depend on the mntvnode_slock to keep things stable enough
|
|
* for a quick test. Since there might be hundreds of
|
|
* thousands of vnodes, we cannot afford even a subroutine
|
|
* call unless there's a good chance that we have work to do.
|
|
*/
|
|
VI_LOCK(vp);
|
|
if (vp->v_iflag & VI_XLOCK) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
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))) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
if ((error = vget(vp, lockreq, td)) != 0) {
|
|
MNT_ILOCK(mp);
|
|
if (error == ENOENT)
|
|
goto loop;
|
|
continue;
|
|
}
|
|
if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vrele(vp);
|
|
MNT_ILOCK(mp);
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
/*
|
|
* Force stale filesystem 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 (allerror == 0 && count) {
|
|
MNT_ILOCK(mp);
|
|
goto loop;
|
|
}
|
|
}
|
|
#ifdef QUOTA
|
|
qsync(mp);
|
|
#endif
|
|
devvp = ump->um_devvp;
|
|
VI_LOCK(devvp);
|
|
if (waitfor != MNT_LAZY &&
|
|
(devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) {
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td);
|
|
if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (allerror == 0 && waitfor == MNT_WAIT) {
|
|
MNT_ILOCK(mp);
|
|
goto loop;
|
|
}
|
|
} else
|
|
VI_UNLOCK(devvp);
|
|
/*
|
|
* Write back modified superblock.
|
|
*/
|
|
if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
int
|
|
ffs_vget(mp, ino, flags, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
{
|
|
struct thread *td = curthread; /* XXX */
|
|
struct fs *fs;
|
|
struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
struct cdev *dev;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
|
|
/*
|
|
* We do not lock vnode creation as it is believed to be too
|
|
* expensive for such rare case as simultaneous creation of vnode
|
|
* for same ino by different processes. We just allow them to race
|
|
* and check later to decide who wins. Let the race begin!
|
|
*/
|
|
if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0)
|
|
return (error);
|
|
if (*vpp != NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
ip = uma_zalloc(uma_inode, M_WAITOK);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
error = getnewvnode("ufs", mp, ffs_vnodeop_p, &vp);
|
|
if (error) {
|
|
*vpp = NULL;
|
|
uma_zfree(uma_inode, ip);
|
|
return (error);
|
|
}
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
/*
|
|
* FFS supports recursive locking.
|
|
*/
|
|
fs = ump->um_fs;
|
|
vp->v_vnlock->lk_flags |= LK_CANRECURSE;
|
|
vp->v_data = ip;
|
|
vp->v_bsize = fs->fs_bsize;
|
|
ip->i_vnode = vp;
|
|
ip->i_ump = ump;
|
|
ip->i_fs = 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
|
|
/*
|
|
* Exclusively lock the vnode before adding to hash. Note, that we
|
|
* must not release nor downgrade the lock (despite flags argument
|
|
* says) till it is fully initialized.
|
|
*/
|
|
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td);
|
|
|
|
/*
|
|
* Atomicaly (in terms of ufs_hash operations) check the hash for
|
|
* duplicate of vnode being created and add it to the hash. If a
|
|
* duplicate vnode was found, it will be vget()ed from hash for us.
|
|
*/
|
|
if ((error = ufs_ihashins(ip, flags, vpp)) != 0) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
|
|
/* We lost the race, then throw away our vnode and return existing */
|
|
if (*vpp != NULL) {
|
|
vput(vp);
|
|
return (0);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
if (ip->i_ump->um_fstype == UFS1)
|
|
ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK);
|
|
else
|
|
ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK);
|
|
ffs_load_inode(bp, ip, 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_fifoop_p, &vp);
|
|
if (error) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
/*
|
|
* Finish inode initialization.
|
|
*/
|
|
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 = arc4random() / 2 + 1;
|
|
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
|
|
ip->i_flag |= IN_MODIFIED;
|
|
DIP_SET(ip, i_gen, ip->i_gen);
|
|
}
|
|
}
|
|
/*
|
|
* Ensure that uid and gid are correct. This is a temporary
|
|
* fix until fsck has been changed to do the update.
|
|
*/
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */
|
|
fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
ip->i_uid = ip->i_din1->di_ouid; /* XXX */
|
|
ip->i_gid = ip->i_din1->di_ogid; /* XXX */
|
|
} /* XXX */
|
|
|
|
#ifdef MAC
|
|
if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) {
|
|
/*
|
|
* If this vnode is already allocated, and we're running
|
|
* multi-label, attempt to perform a label association
|
|
* from the extended attributes on the inode.
|
|
*/
|
|
error = mac_associate_vnode_extattr(mp, vp);
|
|
if (error) {
|
|
/* ufs_inactive will release ip->i_devvp ref. */
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
*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)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
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;
|
|
{
|
|
struct inode *ip;
|
|
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.
|
|
*/
|
|
static int
|
|
ffs_init(vfsp)
|
|
struct vfsconf *vfsp;
|
|
{
|
|
|
|
softdep_initialize();
|
|
return (ufs_init(vfsp));
|
|
}
|
|
|
|
/*
|
|
* Undo the work of ffs_init().
|
|
*/
|
|
static int
|
|
ffs_uninit(vfsp)
|
|
struct vfsconf *vfsp;
|
|
{
|
|
int ret;
|
|
|
|
ret = ufs_uninit(vfsp);
|
|
softdep_uninitialize();
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
static int
|
|
ffs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
struct fs *fs = mp->um_fs;
|
|
struct buf *bp;
|
|
int blks;
|
|
void *space;
|
|
int i, size, error, allerror = 0;
|
|
|
|
if (fs->fs_ronly == 1 &&
|
|
(mp->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) !=
|
|
(MNT_RDONLY | MNT_UPDATE))
|
|
panic("ffs_sbupdate: write read-only filesystem");
|
|
/*
|
|
* 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, 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);
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 &&
|
|
(fs->fs_flags & FS_FLAGS_UPDATED) == 0) {
|
|
printf("%s: correcting fs_sblockloc from %jd to %d\n",
|
|
fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1);
|
|
fs->fs_sblockloc = SBLOCK_UFS1;
|
|
}
|
|
if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 &&
|
|
(fs->fs_flags & FS_FLAGS_UPDATED) == 0) {
|
|
printf("%s: correcting fs_sblockloc from %jd to %d\n",
|
|
fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2);
|
|
fs->fs_sblockloc = SBLOCK_UFS2;
|
|
}
|
|
bp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize,
|
|
0, 0, 0);
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time_second;
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
ffs_oldfscompat_write((struct fs *)bp->b_data, mp);
|
|
if (waitfor != MNT_WAIT)
|
|
bawrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
static int
|
|
ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp,
|
|
int attrnamespace, const char *attrname, struct thread *td)
|
|
{
|
|
|
|
#ifdef UFS_EXTATTR
|
|
return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace,
|
|
attrname, td));
|
|
#else
|
|
return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace,
|
|
attrname, td));
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
ffs_ifree(struct ufsmount *ump, struct inode *ip)
|
|
{
|
|
|
|
if (ump->um_fstype == UFS1 && ip->i_din1 != NULL)
|
|
uma_zfree(uma_ufs1, ip->i_din1);
|
|
else if (ip->i_din2 != NULL)
|
|
uma_zfree(uma_ufs2, ip->i_din2);
|
|
uma_zfree(uma_inode, ip);
|
|
}
|