61e1c19319
implementation in 8.0 and later as its flags field does not hold dynamic state such as waiters flags, but is only modified in lockinit() aside from VN_LOCK_*(). Discussed with: attilio
2045 lines
52 KiB
C
2045 lines
52 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_quota.h"
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#include "opt_ufs.h"
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#include "opt_ffs.h"
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#include "opt_ddb.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/priv.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/malloc.h>
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#include <sys/mutex.h>
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#include <security/mac/mac_framework.h>
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#include <ufs/ufs/extattr.h>
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#include <ufs/ufs/gjournal.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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#include <geom/geom.h>
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#include <geom/geom_vfs.h>
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#include <ddb/ddb.h>
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static uma_zone_t uma_inode, uma_ufs1, uma_ufs2;
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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_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_cmount_t ffs_cmount;
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static vfs_unmount_t ffs_unmount;
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static vfs_mount_t ffs_mount;
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static vfs_statfs_t ffs_statfs;
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static vfs_fhtovp_t ffs_fhtovp;
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static vfs_sync_t ffs_sync;
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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_mount = ffs_mount,
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.vfs_cmount = ffs_cmount,
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.vfs_quotactl = ufs_quotactl,
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.vfs_root = ufs_root,
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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_susp_clean = process_deferred_inactive,
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};
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VFS_SET(ufs_vfsops, ufs, 0);
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MODULE_VERSION(ufs, 1);
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static b_strategy_t ffs_geom_strategy;
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static b_write_t ffs_bufwrite;
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static struct buf_ops ffs_ops = {
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.bop_name = "FFS",
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.bop_write = ffs_bufwrite,
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.bop_strategy = ffs_geom_strategy,
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.bop_sync = bufsync,
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#ifdef NO_FFS_SNAPSHOT
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.bop_bdflush = bufbdflush,
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#else
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.bop_bdflush = ffs_bdflush,
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#endif
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};
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/*
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* Note that userquota and groupquota options are not currently used
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* by UFS/FFS code and generally mount(8) does not pass those options
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* from userland, but they can be passed by loader(8) via
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* vfs.root.mountfrom.options.
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*/
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static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr",
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"noclusterw", "noexec", "export", "force", "from", "groupquota",
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"multilabel", "nfsv4acls", "snapshot", "nosuid", "suiddir", "nosymfollow",
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"sync", "union", "userquota", NULL };
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static int
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ffs_mount(struct mount *mp)
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{
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struct vnode *devvp;
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struct thread *td;
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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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u_int mntorflags;
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accmode_t accmode;
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struct nameidata ndp;
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char *fspec;
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td = curthread;
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if (vfs_filteropt(mp->mnt_optnew, ffs_opts))
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return (EINVAL);
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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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vfs_deleteopt(mp->mnt_optnew, "groupquota");
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vfs_deleteopt(mp->mnt_optnew, "userquota");
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fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
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if (error)
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return (error);
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mntorflags = 0;
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if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0)
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mntorflags |= MNT_ACLS;
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if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) {
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mntorflags |= MNT_SNAPSHOT;
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/*
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* Once we have set the MNT_SNAPSHOT flag, do not
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* persist "snapshot" in the options list.
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*/
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vfs_deleteopt(mp->mnt_optnew, "snapshot");
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vfs_deleteopt(mp->mnt_opt, "snapshot");
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}
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if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) {
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if (mntorflags & MNT_ACLS) {
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printf("WARNING: \"acls\" and \"nfsv4acls\" "
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"options are mutually exclusive\n");
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return (EINVAL);
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}
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mntorflags |= MNT_NFS4ACLS;
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}
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MNT_ILOCK(mp);
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mp->mnt_flag |= mntorflags;
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MNT_IUNLOCK(mp);
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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 &&
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vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
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/*
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* Flush any dirty data and suspend filesystem.
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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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for (;;) {
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vn_finished_write(mp);
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if ((error = vfs_write_suspend(mp)) != 0)
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return (error);
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MNT_ILOCK(mp);
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if (mp->mnt_kern_flag & MNTK_SUSPENDED) {
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/*
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* Allow the secondary writes
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* to proceed.
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*/
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mp->mnt_kern_flag &= ~(MNTK_SUSPENDED |
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MNTK_SUSPEND2);
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wakeup(&mp->mnt_flag);
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MNT_IUNLOCK(mp);
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/*
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* Allow the curthread to
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* ignore the suspension to
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* synchronize on-disk state.
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*/
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td->td_pflags |= TDP_IGNSUSP;
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break;
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}
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MNT_IUNLOCK(mp);
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vn_start_write(NULL, &mp, V_WAIT);
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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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vfs_write_resume(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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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)) != 0) {
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fs->fs_ronly = 0;
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fs->fs_clean = 0;
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vfs_write_resume(mp);
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return (error);
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}
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DROP_GIANT();
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g_topology_lock();
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g_access(ump->um_cp, 0, -1, 0);
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g_topology_unlock();
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PICKUP_GIANT();
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fs->fs_ronly = 1;
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MNT_ILOCK(mp);
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mp->mnt_flag |= MNT_RDONLY;
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MNT_IUNLOCK(mp);
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/*
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* Allow the writers to note that filesystem
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* is ro now.
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*/
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vfs_write_resume(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 &&
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!vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
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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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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
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error = VOP_ACCESS(devvp, VREAD | VWRITE,
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td->td_ucred, td);
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if (error)
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error = priv_check(td, PRIV_VFS_MOUNT_PERM);
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if (error) {
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VOP_UNLOCK(devvp, 0);
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return (error);
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}
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VOP_UNLOCK(devvp, 0);
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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 &
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(FS_SUJ | 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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if (fs->fs_flags & FS_SUJ)
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printf(
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"WARNING: Forced mount will invalidated journal contents\n");
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return (EPERM);
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}
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}
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DROP_GIANT();
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g_topology_lock();
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/*
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* If we're the root device, we may not have an E count
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* yet, get it now.
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*/
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if (ump->um_cp->ace == 0)
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error = g_access(ump->um_cp, 0, 1, 1);
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else
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error = g_access(ump->um_cp, 0, 1, 0);
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g_topology_unlock();
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PICKUP_GIANT();
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if (error)
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return (error);
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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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MNT_ILOCK(mp);
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mp->mnt_flag &= ~MNT_RDONLY;
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MNT_IUNLOCK(mp);
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fs->fs_mtime = time_second;
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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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fs->fs_clean = 0;
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if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) {
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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) {
|
|
/* XXX: Reset too late ? */
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MNT_ILOCK(mp);
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mp->mnt_flag &= ~MNT_ASYNC;
|
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MNT_IUNLOCK(mp);
|
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}
|
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/*
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* Keep MNT_ACLS flag if it is stored in superblock.
|
|
*/
|
|
if ((fs->fs_flags & FS_ACLS) != 0) {
|
|
/* XXX: Set too late ? */
|
|
MNT_ILOCK(mp);
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mp->mnt_flag |= MNT_ACLS;
|
|
MNT_IUNLOCK(mp);
|
|
}
|
|
|
|
if ((fs->fs_flags & FS_NFS4ACLS) != 0) {
|
|
/* XXX: Set too late ? */
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_NFS4ACLS;
|
|
MNT_IUNLOCK(mp);
|
|
}
|
|
|
|
/*
|
|
* If this is a snapshot request, take the snapshot.
|
|
*/
|
|
if (mp->mnt_flag & MNT_SNAPSHOT)
|
|
return (ffs_snapshot(mp, fspec));
|
|
}
|
|
|
|
/*
|
|
* Not an update, or updating the name: look up the name
|
|
* and verify that it refers to a sensible disk device.
|
|
*/
|
|
NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
|
|
if ((error = namei(&ndp)) != 0)
|
|
return (error);
|
|
NDFREE(&ndp, NDF_ONLY_PNBUF);
|
|
devvp = ndp.ni_vp;
|
|
if (!vn_isdisk(devvp, &error)) {
|
|
vput(devvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If mount by non-root, then verify that user has necessary
|
|
* permissions on the device.
|
|
*/
|
|
accmode = VREAD;
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
accmode |= VWRITE;
|
|
error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
|
|
if (error)
|
|
error = priv_check(td, PRIV_VFS_MOUNT_PERM);
|
|
if (error) {
|
|
vput(devvp);
|
|
return (error);
|
|
}
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
/*
|
|
* Update only
|
|
*
|
|
* If it's not the same vnode, or at least the same device
|
|
* then it's not correct.
|
|
*/
|
|
|
|
if (devvp->v_rdev != ump->um_devvp->v_rdev)
|
|
error = EINVAL; /* needs translation */
|
|
vput(devvp);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
/*
|
|
* New mount
|
|
*
|
|
* We need the name for the mount point (also used for
|
|
* "last mounted on") copied in. If an error occurs,
|
|
* the mount point is discarded by the upper level code.
|
|
* Note that vfs_mount() populates f_mntonname for us.
|
|
*/
|
|
if ((error = ffs_mountfs(devvp, mp, td)) != 0) {
|
|
vrele(devvp);
|
|
return (error);
|
|
}
|
|
}
|
|
vfs_mountedfrom(mp, fspec);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Compatibility with old mount system call.
|
|
*/
|
|
|
|
static int
|
|
ffs_cmount(struct mntarg *ma, void *data, int flags)
|
|
{
|
|
struct ufs_args args;
|
|
int error;
|
|
|
|
if (data == NULL)
|
|
return (EINVAL);
|
|
error = copyin(data, &args, sizeof args);
|
|
if (error)
|
|
return (error);
|
|
|
|
ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
|
|
ma = mount_arg(ma, "export", &args.export, sizeof args.export);
|
|
error = kernel_mount(ma, flags);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reload all incore data for a filesystem (used after running fsck on
|
|
* the root filesystem and finding things to fix). The filesystem must
|
|
* be mounted read-only.
|
|
*
|
|
* Things to do to update the mount:
|
|
* 1) invalidate all cached meta-data.
|
|
* 2) re-read superblock from disk.
|
|
* 3) re-read summary information from disk.
|
|
* 4) invalidate all inactive vnodes.
|
|
* 5) invalidate all cached file data.
|
|
* 6) re-read inode data for all active vnodes.
|
|
*/
|
|
static int
|
|
ffs_reload(struct mount *mp, struct thread *td)
|
|
{
|
|
struct vnode *vp, *mvp, *devvp;
|
|
struct inode *ip;
|
|
void *space;
|
|
struct buf *bp;
|
|
struct fs *fs, *newfs;
|
|
struct ufsmount *ump;
|
|
ufs2_daddr_t sblockloc;
|
|
int i, blks, size, error;
|
|
int32_t *lp;
|
|
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
return (EINVAL);
|
|
ump = VFSTOUFS(mp);
|
|
/*
|
|
* Step 1: invalidate all cached meta-data.
|
|
*/
|
|
devvp = VFSTOUFS(mp)->um_devvp;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vinvalbuf(devvp, 0, 0, 0) != 0)
|
|
panic("ffs_reload: dirty1");
|
|
VOP_UNLOCK(devvp, 0);
|
|
|
|
/*
|
|
* Step 2: re-read superblock from disk.
|
|
*/
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize,
|
|
NOCRED, &bp)) != 0)
|
|
return (error);
|
|
newfs = (struct fs *)bp->b_data;
|
|
if ((newfs->fs_magic != FS_UFS1_MAGIC &&
|
|
newfs->fs_magic != FS_UFS2_MAGIC) ||
|
|
newfs->fs_bsize > MAXBSIZE ||
|
|
newfs->fs_bsize < sizeof(struct fs)) {
|
|
brelse(bp);
|
|
return (EIO); /* XXX needs translation */
|
|
}
|
|
/*
|
|
* Copy pointer fields back into superblock before copying in XXX
|
|
* new superblock. These should really be in the ufsmount. XXX
|
|
* Note that important parameters (eg fs_ncg) are unchanged.
|
|
*/
|
|
newfs->fs_csp = fs->fs_csp;
|
|
newfs->fs_maxcluster = fs->fs_maxcluster;
|
|
newfs->fs_contigdirs = fs->fs_contigdirs;
|
|
newfs->fs_active = fs->fs_active;
|
|
/* The file system is still read-only. */
|
|
newfs->fs_ronly = 1;
|
|
sblockloc = fs->fs_sblockloc;
|
|
bcopy(newfs, fs, (u_int)fs->fs_sbsize);
|
|
brelse(bp);
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc);
|
|
UFS_LOCK(ump);
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: reload 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;
|
|
}
|
|
UFS_UNLOCK(ump);
|
|
|
|
/*
|
|
* Step 3: re-read summary information from disk.
|
|
*/
|
|
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;
|
|
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
|
|
NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
space = (char *)space + size;
|
|
brelse(bp);
|
|
}
|
|
/*
|
|
* 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++)
|
|
*lp++ = fs->fs_contigsumsize;
|
|
}
|
|
|
|
loop:
|
|
MNT_ILOCK(mp);
|
|
MNT_VNODE_FOREACH(vp, mp, mvp) {
|
|
VI_LOCK(vp);
|
|
if (vp->v_iflag & VI_DOOMED) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
/*
|
|
* Step 4: invalidate all cached file data.
|
|
*/
|
|
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
|
|
MNT_VNODE_FOREACH_ABORT(mp, mvp);
|
|
goto loop;
|
|
}
|
|
if (vinvalbuf(vp, 0, 0, 0))
|
|
panic("ffs_reload: dirty2");
|
|
/*
|
|
* Step 5: 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);
|
|
vrele(vp);
|
|
MNT_VNODE_FOREACH_ABORT(mp, mvp);
|
|
return (error);
|
|
}
|
|
ffs_load_inode(bp, ip, fs, ip->i_number);
|
|
ip->i_effnlink = ip->i_nlink;
|
|
brelse(bp);
|
|
VOP_UNLOCK(vp, 0);
|
|
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;
|
|
struct g_consumer *cp;
|
|
struct mount *nmp;
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
cred = td ? td->td_ucred : NOCRED;
|
|
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
|
|
dev = devvp->v_rdev;
|
|
dev_ref(dev);
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1);
|
|
|
|
/*
|
|
* If we are a root mount, drop the E flag so fsck can do its magic.
|
|
* We will pick it up again when we remount R/W.
|
|
*/
|
|
if (error == 0 && ronly && (mp->mnt_flag & MNT_ROOTFS))
|
|
error = g_access(cp, 0, 0, -1);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
VOP_UNLOCK(devvp, 0);
|
|
if (error)
|
|
goto out;
|
|
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;
|
|
|
|
devvp->v_bufobj.bo_ops = &ffs_ops;
|
|
|
|
fs = NULL;
|
|
sblockloc = 0;
|
|
/*
|
|
* Try reading the superblock in each of its possible locations.
|
|
*/
|
|
for (i = 0; sblock_try[i] != -1; i++) {
|
|
if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) {
|
|
error = EINVAL;
|
|
vfs_mount_error(mp,
|
|
"Invalid sectorsize %d for superblock size %d",
|
|
cp->provider->sectorsize, SBLOCKSIZE);
|
|
goto out;
|
|
}
|
|
if ((error = bread(devvp, btodb(sblock_try[i]), 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_SUJ | 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);
|
|
if (fs->fs_flags & FS_SUJ)
|
|
printf(
|
|
"WARNING: Forced mount will invalidated journal contents\n");
|
|
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;
|
|
}
|
|
if ((fs->fs_flags & FS_GJOURNAL) != 0) {
|
|
#ifdef UFS_GJOURNAL
|
|
/*
|
|
* Get journal provider name.
|
|
*/
|
|
size = 1024;
|
|
mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK);
|
|
if (g_io_getattr("GJOURNAL::provider", cp, &size,
|
|
mp->mnt_gjprovider) == 0) {
|
|
mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size,
|
|
M_UFSMNT, M_WAITOK);
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_GJOURNAL;
|
|
MNT_IUNLOCK(mp);
|
|
} else {
|
|
printf(
|
|
"WARNING: %s: GJOURNAL flag on fs but no gjournal provider below\n",
|
|
mp->mnt_stat.f_mntonname);
|
|
free(mp->mnt_gjprovider, M_UFSMNT);
|
|
mp->mnt_gjprovider = NULL;
|
|
}
|
|
#else
|
|
printf(
|
|
"WARNING: %s: GJOURNAL flag on fs but no UFS_GJOURNAL support\n",
|
|
mp->mnt_stat.f_mntonname);
|
|
#endif
|
|
} else {
|
|
mp->mnt_gjprovider = NULL;
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO);
|
|
ump->um_cp = cp;
|
|
ump->um_bo = &devvp->v_bufobj;
|
|
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;
|
|
ump->um_rdonly = ffs_rdonly;
|
|
mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF);
|
|
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 = ump;
|
|
mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
|
|
mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
|
|
nmp = NULL;
|
|
if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
|
|
(nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) {
|
|
if (nmp)
|
|
vfs_rel(nmp);
|
|
vfs_getnewfsid(mp);
|
|
}
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
MNT_IUNLOCK(mp);
|
|
if ((fs->fs_flags & FS_MULTILABEL) != 0) {
|
|
#ifdef MAC
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_MULTILABEL;
|
|
MNT_IUNLOCK(mp);
|
|
#else
|
|
printf(
|
|
"WARNING: %s: multilabel flag on fs but no MAC support\n",
|
|
mp->mnt_stat.f_mntonname);
|
|
#endif
|
|
}
|
|
if ((fs->fs_flags & FS_ACLS) != 0) {
|
|
#ifdef UFS_ACL
|
|
MNT_ILOCK(mp);
|
|
|
|
if (mp->mnt_flag & MNT_NFS4ACLS)
|
|
printf("WARNING: ACLs flag on fs conflicts with "
|
|
"\"nfsv4acls\" mount option; option ignored\n");
|
|
mp->mnt_flag &= ~MNT_NFS4ACLS;
|
|
mp->mnt_flag |= MNT_ACLS;
|
|
|
|
MNT_IUNLOCK(mp);
|
|
#else
|
|
printf(
|
|
"WARNING: %s: ACLs flag on fs but no ACLs support\n",
|
|
mp->mnt_stat.f_mntonname);
|
|
#endif
|
|
}
|
|
if ((fs->fs_flags & FS_NFS4ACLS) != 0) {
|
|
#ifdef UFS_ACL
|
|
MNT_ILOCK(mp);
|
|
|
|
if (mp->mnt_flag & MNT_ACLS)
|
|
printf("WARNING: NFSv4 ACLs flag on fs conflicts with "
|
|
"\"acls\" mount option; option ignored\n");
|
|
mp->mnt_flag &= ~MNT_ACLS;
|
|
mp->mnt_flag |= MNT_NFS4ACLS;
|
|
|
|
MNT_IUNLOCK(mp);
|
|
#else
|
|
printf(
|
|
"WARNING: %s: NFSv4 ACLs flag on fs but no ACLs support\n",
|
|
mp->mnt_stat.f_mntonname);
|
|
#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
|
|
/*
|
|
* Set FS local "last mounted on" information (NULL pad)
|
|
*/
|
|
bzero(fs->fs_fsmnt, MAXMNTLEN);
|
|
strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN);
|
|
mp->mnt_stat.f_iosize = fs->fs_bsize;
|
|
|
|
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) {
|
|
fs->fs_mtime = time_second;
|
|
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, 0);
|
|
}
|
|
/*
|
|
* Initialize filesystem stat information in mount struct.
|
|
*/
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED |
|
|
MNTK_EXTENDED_SHARED;
|
|
MNT_IUNLOCK(mp);
|
|
#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:
|
|
if (bp)
|
|
brelse(bp);
|
|
if (cp != NULL) {
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
g_vfs_close(cp);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
}
|
|
if (ump) {
|
|
mtx_destroy(UFS_MTX(ump));
|
|
if (mp->mnt_gjprovider != NULL) {
|
|
free(mp->mnt_gjprovider, M_UFSMNT);
|
|
mp->mnt_gjprovider = NULL;
|
|
}
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = NULL;
|
|
}
|
|
dev_rel(dev);
|
|
return (error);
|
|
}
|
|
|
|
#include <sys/sysctl.h>
|
|
static 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 = ((uint64_t)1 << 31) - 1;
|
|
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 = (uint64_t)0x80000000 * 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.
|
|
*/
|
|
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
|
|
*/
|
|
static int
|
|
ffs_unmount(mp, mntflags)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
{
|
|
struct thread *td;
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
struct fs *fs;
|
|
int error, flags, susp;
|
|
#ifdef UFS_EXTATTR
|
|
int e_restart;
|
|
#endif
|
|
|
|
flags = 0;
|
|
td = curthread;
|
|
fs = ump->um_fs;
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
susp = fs->fs_ronly != 0;
|
|
} else
|
|
susp = 0;
|
|
#ifdef UFS_EXTATTR
|
|
if ((error = ufs_extattr_stop(mp, td))) {
|
|
if (error != EOPNOTSUPP)
|
|
printf("ffs_unmount: ufs_extattr_stop returned %d\n",
|
|
error);
|
|
e_restart = 0;
|
|
} else {
|
|
ufs_extattr_uepm_destroy(&ump->um_extattr);
|
|
e_restart = 1;
|
|
}
|
|
#endif
|
|
if (susp) {
|
|
/*
|
|
* dounmount already called vn_start_write().
|
|
*/
|
|
for (;;) {
|
|
vn_finished_write(mp);
|
|
if ((error = vfs_write_suspend(mp)) != 0)
|
|
return (error);
|
|
MNT_ILOCK(mp);
|
|
if (mp->mnt_kern_flag & MNTK_SUSPENDED) {
|
|
mp->mnt_kern_flag &= ~(MNTK_SUSPENDED |
|
|
MNTK_SUSPEND2);
|
|
wakeup(&mp->mnt_flag);
|
|
MNT_IUNLOCK(mp);
|
|
td->td_pflags |= TDP_IGNSUSP;
|
|
break;
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
vn_start_write(NULL, &mp, V_WAIT);
|
|
}
|
|
}
|
|
if (mp->mnt_flag & MNT_SOFTDEP)
|
|
error = softdep_flushfiles(mp, flags, td);
|
|
else
|
|
error = ffs_flushfiles(mp, flags, td);
|
|
if (error != 0 && error != ENXIO)
|
|
goto fail;
|
|
|
|
UFS_LOCK(ump);
|
|
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;
|
|
}
|
|
UFS_UNLOCK(ump);
|
|
softdep_unmount(mp);
|
|
if (fs->fs_ronly == 0) {
|
|
fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1;
|
|
error = ffs_sbupdate(ump, MNT_WAIT, 0);
|
|
if (error && error != ENXIO) {
|
|
fs->fs_clean = 0;
|
|
goto fail;
|
|
}
|
|
}
|
|
if (susp) {
|
|
vfs_write_resume(mp);
|
|
vn_start_write(NULL, &mp, V_WAIT);
|
|
}
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
g_vfs_close(ump->um_cp);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
vrele(ump->um_devvp);
|
|
dev_rel(ump->um_dev);
|
|
mtx_destroy(UFS_MTX(ump));
|
|
if (mp->mnt_gjprovider != NULL) {
|
|
free(mp->mnt_gjprovider, M_UFSMNT);
|
|
mp->mnt_gjprovider = NULL;
|
|
}
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
free(fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = NULL;
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
MNT_IUNLOCK(mp);
|
|
return (error);
|
|
|
|
fail:
|
|
if (susp) {
|
|
vfs_write_resume(mp);
|
|
vn_start_write(NULL, &mp, V_WAIT);
|
|
}
|
|
#ifdef UFS_EXTATTR
|
|
if (e_restart) {
|
|
ufs_extattr_uepm_init(&ump->um_extattr);
|
|
#ifdef UFS_EXTATTR_AUTOSTART
|
|
(void) ufs_extattr_autostart(mp, td);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
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++) {
|
|
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);
|
|
flags |= FORCECLOSE;
|
|
/*
|
|
* 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);
|
|
error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td);
|
|
VOP_UNLOCK(ump->um_devvp, 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
static int
|
|
ffs_statfs(mp, sbp)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
{
|
|
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;
|
|
UFS_LOCK(ump);
|
|
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;
|
|
UFS_UNLOCK(ump);
|
|
sbp->f_namemax = NAME_MAX;
|
|
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'.
|
|
*/
|
|
static int
|
|
ffs_sync(mp, waitfor)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
{
|
|
struct vnode *mvp, *vp, *devvp;
|
|
struct thread *td;
|
|
struct inode *ip;
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
struct fs *fs;
|
|
int error, count, wait, lockreq, allerror = 0;
|
|
int suspend;
|
|
int suspended;
|
|
int secondary_writes;
|
|
int secondary_accwrites;
|
|
int softdep_deps;
|
|
int softdep_accdeps;
|
|
struct bufobj *bo;
|
|
|
|
td = curthread;
|
|
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;
|
|
suspend = 0;
|
|
suspended = 0;
|
|
lockreq = LK_EXCLUSIVE | LK_NOWAIT;
|
|
if (waitfor == MNT_SUSPEND) {
|
|
suspend = 1;
|
|
waitfor = MNT_WAIT;
|
|
}
|
|
if (waitfor == MNT_WAIT) {
|
|
wait = 1;
|
|
lockreq = LK_EXCLUSIVE;
|
|
}
|
|
lockreq |= LK_INTERLOCK | LK_SLEEPFAIL;
|
|
MNT_ILOCK(mp);
|
|
loop:
|
|
/* Grab snapshot of secondary write counts */
|
|
secondary_writes = mp->mnt_secondary_writes;
|
|
secondary_accwrites = mp->mnt_secondary_accwrites;
|
|
|
|
/* Grab snapshot of softdep dependency counts */
|
|
MNT_IUNLOCK(mp);
|
|
softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps);
|
|
MNT_ILOCK(mp);
|
|
|
|
MNT_VNODE_FOREACH(vp, mp, mvp) {
|
|
/*
|
|
* 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_DOOMED) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
ip = VTOI(vp);
|
|
if (vp->v_type == VNON || ((ip->i_flag &
|
|
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
|
|
vp->v_bufobj.bo_dirty.bv_cnt == 0)) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
if ((error = vget(vp, lockreq, td)) != 0) {
|
|
MNT_ILOCK(mp);
|
|
if (error == ENOENT || error == ENOLCK) {
|
|
MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
|
|
goto loop;
|
|
}
|
|
continue;
|
|
}
|
|
if ((error = ffs_syncvnode(vp, waitfor)) != 0)
|
|
allerror = error;
|
|
vput(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;
|
|
bo = &devvp->v_bufobj;
|
|
BO_LOCK(bo);
|
|
if (waitfor != MNT_LAZY &&
|
|
(bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) {
|
|
BO_UNLOCK(bo);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
|
|
if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(devvp, 0);
|
|
if (allerror == 0 && waitfor == MNT_WAIT) {
|
|
MNT_ILOCK(mp);
|
|
goto loop;
|
|
}
|
|
} else if (suspend != 0) {
|
|
if (softdep_check_suspend(mp,
|
|
devvp,
|
|
softdep_deps,
|
|
softdep_accdeps,
|
|
secondary_writes,
|
|
secondary_accwrites) != 0)
|
|
goto loop; /* More work needed */
|
|
mtx_assert(MNT_MTX(mp), MA_OWNED);
|
|
mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED;
|
|
MNT_IUNLOCK(mp);
|
|
suspended = 1;
|
|
} else
|
|
BO_UNLOCK(bo);
|
|
/*
|
|
* Write back modified superblock.
|
|
*/
|
|
if (fs->fs_fmod != 0 &&
|
|
(error = ffs_sbupdate(ump, waitfor, suspended)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
int
|
|
ffs_vget(mp, ino, flags, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
{
|
|
return (ffs_vgetf(mp, ino, flags, vpp, 0));
|
|
}
|
|
|
|
int
|
|
ffs_vgetf(mp, ino, flags, vpp, ffs_flags)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
int ffs_flags;
|
|
{
|
|
struct fs *fs;
|
|
struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
struct cdev *dev;
|
|
int error;
|
|
|
|
error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
|
|
if (error || *vpp != NULL)
|
|
return (error);
|
|
|
|
/*
|
|
* We must promote to an exclusive lock for vnode creation. This
|
|
* can happen if lookup is passed LOCKSHARED.
|
|
*/
|
|
if ((flags & LK_TYPE_MASK) == LK_SHARED) {
|
|
flags &= ~LK_TYPE_MASK;
|
|
flags |= LK_EXCLUSIVE;
|
|
}
|
|
|
|
/*
|
|
* 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!
|
|
*/
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
fs = ump->um_fs;
|
|
|
|
/*
|
|
* 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 | M_ZERO);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
if (fs->fs_magic == FS_UFS1_MAGIC)
|
|
error = getnewvnode("ufs", mp, &ffs_vnodeops1, &vp);
|
|
else
|
|
error = getnewvnode("ufs", mp, &ffs_vnodeops2, &vp);
|
|
if (error) {
|
|
*vpp = NULL;
|
|
uma_zfree(uma_inode, ip);
|
|
return (error);
|
|
}
|
|
/*
|
|
* FFS supports recursive locking.
|
|
*/
|
|
VN_LOCK_AREC(vp);
|
|
vp->v_data = ip;
|
|
vp->v_bufobj.bo_bsize = fs->fs_bsize;
|
|
ip->i_vnode = vp;
|
|
ip->i_ump = ump;
|
|
ip->i_fs = fs;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
ip->i_ea_refs = 0;
|
|
#ifdef QUOTA
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ip->i_dquot[i] = NODQUOT;
|
|
}
|
|
#endif
|
|
|
|
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
|
|
if (ffs_flags & FFSV_FORCEINSMQ)
|
|
vp->v_vflag |= VV_FORCEINSMQ;
|
|
error = insmntque(vp, mp);
|
|
if (error != 0) {
|
|
uma_zfree(uma_inode, ip);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
vp->v_vflag &= ~VV_FORCEINSMQ;
|
|
error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
|
|
if (error || *vpp != NULL)
|
|
return (error);
|
|
|
|
/* 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.
|
|
*/
|
|
if (ip->i_ump->um_fstype == UFS1)
|
|
error = ufs_vinit(mp, &ffs_fifoops1, &vp);
|
|
else
|
|
error = ufs_vinit(mp, &ffs_fifoops2, &vp);
|
|
if (error) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Finish inode initialization.
|
|
*/
|
|
if (vp->v_type != VFIFO) {
|
|
/* FFS supports shared locking for all files except fifos. */
|
|
VN_LOCK_ASHARE(vp);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
}
|
|
#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_vnode_associate_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
|
|
*/
|
|
static 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));
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
ffs_sbupdate(mp, waitfor, suspended)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
int suspended;
|
|
{
|
|
struct fs *fs = mp->um_fs;
|
|
struct buf *sbbp;
|
|
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");
|
|
/*
|
|
* We use the superblock's buf to serialize calls to ffs_sbupdate().
|
|
*/
|
|
sbbp = getblk(mp->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize,
|
|
0, 0, 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, 0);
|
|
bcopy(space, bp->b_data, (u_int)size);
|
|
space = (char *)space + size;
|
|
if (suspended)
|
|
bp->b_flags |= B_VALIDSUSPWRT;
|
|
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) {
|
|
brelse(sbbp);
|
|
return (allerror);
|
|
}
|
|
bp = sbbp;
|
|
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;
|
|
}
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time_second;
|
|
if (fs->fs_flags & FS_DOSOFTDEP)
|
|
softdep_setup_sbupdate(mp, (struct fs *)bp->b_data, bp);
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
ffs_oldfscompat_write((struct fs *)bp->b_data, mp);
|
|
if (suspended)
|
|
bp->b_flags |= B_VALIDSUSPWRT;
|
|
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)
|
|
{
|
|
|
|
#ifdef UFS_EXTATTR
|
|
return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace,
|
|
attrname));
|
|
#else
|
|
return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace,
|
|
attrname));
|
|
#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);
|
|
}
|
|
|
|
static int dobkgrdwrite = 1;
|
|
SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0,
|
|
"Do background writes (honoring the BV_BKGRDWRITE flag)?");
|
|
|
|
/*
|
|
* Complete a background write started from bwrite.
|
|
*/
|
|
static void
|
|
ffs_backgroundwritedone(struct buf *bp)
|
|
{
|
|
struct bufobj *bufobj;
|
|
struct buf *origbp;
|
|
|
|
/*
|
|
* Find the original buffer that we are writing.
|
|
*/
|
|
bufobj = bp->b_bufobj;
|
|
BO_LOCK(bufobj);
|
|
if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL)
|
|
panic("backgroundwritedone: lost buffer");
|
|
/* Grab an extra reference to be dropped by the bufdone() below. */
|
|
bufobj_wrefl(bufobj);
|
|
BO_UNLOCK(bufobj);
|
|
/*
|
|
* Process dependencies then return any unfinished ones.
|
|
*/
|
|
if (!LIST_EMPTY(&bp->b_dep))
|
|
buf_complete(bp);
|
|
#ifdef SOFTUPDATES
|
|
if (!LIST_EMPTY(&bp->b_dep))
|
|
softdep_move_dependencies(bp, origbp);
|
|
#endif
|
|
/*
|
|
* This buffer is marked B_NOCACHE so when it is released
|
|
* by biodone it will be tossed.
|
|
*/
|
|
bp->b_flags |= B_NOCACHE;
|
|
bp->b_flags &= ~B_CACHE;
|
|
bufdone(bp);
|
|
BO_LOCK(bufobj);
|
|
/*
|
|
* Clear the BV_BKGRDINPROG flag in the original buffer
|
|
* and awaken it if it is waiting for the write to complete.
|
|
* If BV_BKGRDINPROG is not set in the original buffer it must
|
|
* have been released and re-instantiated - which is not legal.
|
|
*/
|
|
KASSERT((origbp->b_vflags & BV_BKGRDINPROG),
|
|
("backgroundwritedone: lost buffer2"));
|
|
origbp->b_vflags &= ~BV_BKGRDINPROG;
|
|
if (origbp->b_vflags & BV_BKGRDWAIT) {
|
|
origbp->b_vflags &= ~BV_BKGRDWAIT;
|
|
wakeup(&origbp->b_xflags);
|
|
}
|
|
BO_UNLOCK(bufobj);
|
|
}
|
|
|
|
|
|
/*
|
|
* Write, release buffer on completion. (Done by iodone
|
|
* if async). Do not bother writing anything if the buffer
|
|
* is invalid.
|
|
*
|
|
* Note that we set B_CACHE here, indicating that buffer is
|
|
* fully valid and thus cacheable. This is true even of NFS
|
|
* now so we set it generally. This could be set either here
|
|
* or in biodone() since the I/O is synchronous. We put it
|
|
* here.
|
|
*/
|
|
static int
|
|
ffs_bufwrite(struct buf *bp)
|
|
{
|
|
int oldflags, s;
|
|
struct buf *newbp;
|
|
|
|
CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags);
|
|
if (bp->b_flags & B_INVAL) {
|
|
brelse(bp);
|
|
return (0);
|
|
}
|
|
|
|
oldflags = bp->b_flags;
|
|
|
|
if (!BUF_ISLOCKED(bp))
|
|
panic("bufwrite: buffer is not busy???");
|
|
s = splbio();
|
|
/*
|
|
* If a background write is already in progress, delay
|
|
* writing this block if it is asynchronous. Otherwise
|
|
* wait for the background write to complete.
|
|
*/
|
|
BO_LOCK(bp->b_bufobj);
|
|
if (bp->b_vflags & BV_BKGRDINPROG) {
|
|
if (bp->b_flags & B_ASYNC) {
|
|
BO_UNLOCK(bp->b_bufobj);
|
|
splx(s);
|
|
bdwrite(bp);
|
|
return (0);
|
|
}
|
|
bp->b_vflags |= BV_BKGRDWAIT;
|
|
msleep(&bp->b_xflags, BO_MTX(bp->b_bufobj), PRIBIO, "bwrbg", 0);
|
|
if (bp->b_vflags & BV_BKGRDINPROG)
|
|
panic("bufwrite: still writing");
|
|
}
|
|
BO_UNLOCK(bp->b_bufobj);
|
|
|
|
/*
|
|
* If this buffer is marked for background writing and we
|
|
* do not have to wait for it, make a copy and write the
|
|
* copy so as to leave this buffer ready for further use.
|
|
*
|
|
* This optimization eats a lot of memory. If we have a page
|
|
* or buffer shortfall we can't do it.
|
|
*/
|
|
if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) &&
|
|
(bp->b_flags & B_ASYNC) &&
|
|
!vm_page_count_severe() &&
|
|
!buf_dirty_count_severe()) {
|
|
KASSERT(bp->b_iodone == NULL,
|
|
("bufwrite: needs chained iodone (%p)", bp->b_iodone));
|
|
|
|
/* get a new block */
|
|
newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD);
|
|
if (newbp == NULL)
|
|
goto normal_write;
|
|
|
|
/*
|
|
* set it to be identical to the old block. We have to
|
|
* set b_lblkno and BKGRDMARKER before calling bgetvp()
|
|
* to avoid confusing the splay tree and gbincore().
|
|
*/
|
|
memcpy(newbp->b_data, bp->b_data, bp->b_bufsize);
|
|
newbp->b_lblkno = bp->b_lblkno;
|
|
newbp->b_xflags |= BX_BKGRDMARKER;
|
|
BO_LOCK(bp->b_bufobj);
|
|
bp->b_vflags |= BV_BKGRDINPROG;
|
|
bgetvp(bp->b_vp, newbp);
|
|
BO_UNLOCK(bp->b_bufobj);
|
|
newbp->b_bufobj = &bp->b_vp->v_bufobj;
|
|
newbp->b_blkno = bp->b_blkno;
|
|
newbp->b_offset = bp->b_offset;
|
|
newbp->b_iodone = ffs_backgroundwritedone;
|
|
newbp->b_flags |= B_ASYNC;
|
|
newbp->b_flags &= ~B_INVAL;
|
|
|
|
#ifdef SOFTUPDATES
|
|
/*
|
|
* Move over the dependencies. If there are rollbacks,
|
|
* leave the parent buffer dirtied as it will need to
|
|
* be written again.
|
|
*/
|
|
if (LIST_EMPTY(&bp->b_dep) ||
|
|
softdep_move_dependencies(bp, newbp) == 0)
|
|
bundirty(bp);
|
|
#else
|
|
bundirty(bp);
|
|
#endif
|
|
|
|
/*
|
|
* Initiate write on the copy, release the original to
|
|
* the B_LOCKED queue so that it cannot go away until
|
|
* the background write completes. If not locked it could go
|
|
* away and then be reconstituted while it was being written.
|
|
* If the reconstituted buffer were written, we could end up
|
|
* with two background copies being written at the same time.
|
|
*/
|
|
bqrelse(bp);
|
|
bp = newbp;
|
|
} else
|
|
/* Mark the buffer clean */
|
|
bundirty(bp);
|
|
|
|
|
|
/* Let the normal bufwrite do the rest for us */
|
|
normal_write:
|
|
return (bufwrite(bp));
|
|
}
|
|
|
|
|
|
static void
|
|
ffs_geom_strategy(struct bufobj *bo, struct buf *bp)
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
struct buf *tbp;
|
|
int nocopy;
|
|
|
|
vp = bo->__bo_vnode;
|
|
if (bp->b_iocmd == BIO_WRITE) {
|
|
if ((bp->b_flags & B_VALIDSUSPWRT) == 0 &&
|
|
bp->b_vp != NULL && bp->b_vp->v_mount != NULL &&
|
|
(bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0)
|
|
panic("ffs_geom_strategy: bad I/O");
|
|
nocopy = bp->b_flags & B_NOCOPY;
|
|
bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY);
|
|
if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 &&
|
|
vp->v_rdev->si_snapdata != NULL) {
|
|
if ((bp->b_flags & B_CLUSTER) != 0) {
|
|
runningbufwakeup(bp);
|
|
TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head,
|
|
b_cluster.cluster_entry) {
|
|
error = ffs_copyonwrite(vp, tbp);
|
|
if (error != 0 &&
|
|
error != EOPNOTSUPP) {
|
|
bp->b_error = error;
|
|
bp->b_ioflags |= BIO_ERROR;
|
|
bufdone(bp);
|
|
return;
|
|
}
|
|
}
|
|
bp->b_runningbufspace = bp->b_bufsize;
|
|
atomic_add_long(&runningbufspace,
|
|
bp->b_runningbufspace);
|
|
} else {
|
|
error = ffs_copyonwrite(vp, bp);
|
|
if (error != 0 && error != EOPNOTSUPP) {
|
|
bp->b_error = error;
|
|
bp->b_ioflags |= BIO_ERROR;
|
|
bufdone(bp);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
#ifdef SOFTUPDATES
|
|
if ((bp->b_flags & B_CLUSTER) != 0) {
|
|
TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head,
|
|
b_cluster.cluster_entry) {
|
|
if (!LIST_EMPTY(&tbp->b_dep))
|
|
buf_start(tbp);
|
|
}
|
|
} else {
|
|
if (!LIST_EMPTY(&bp->b_dep))
|
|
buf_start(bp);
|
|
}
|
|
|
|
#endif
|
|
}
|
|
g_vfs_strategy(bo, bp);
|
|
}
|
|
|
|
#ifdef DDB
|
|
|
|
static void
|
|
db_print_ffs(struct ufsmount *ump)
|
|
{
|
|
db_printf("mp %p %s devvp %p fs %p su_wl %d su_wl_in %d su_deps %d "
|
|
"su_req %d\n",
|
|
ump->um_mountp, ump->um_mountp->mnt_stat.f_mntonname,
|
|
ump->um_devvp, ump->um_fs, ump->softdep_on_worklist,
|
|
ump->softdep_on_worklist_inprogress, ump->softdep_deps,
|
|
ump->softdep_req);
|
|
}
|
|
|
|
DB_SHOW_COMMAND(ffs, db_show_ffs)
|
|
{
|
|
struct mount *mp;
|
|
struct ufsmount *ump;
|
|
|
|
if (have_addr) {
|
|
ump = VFSTOUFS((struct mount *)addr);
|
|
db_print_ffs(ump);
|
|
return;
|
|
}
|
|
|
|
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
|
|
if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name))
|
|
db_print_ffs(VFSTOUFS(mp));
|
|
}
|
|
}
|
|
|
|
#endif /* DDB */
|