211 lines
6.4 KiB
C
211 lines
6.4 KiB
C
/* $NetBSD: restart.c,v 1.1.1.4 2001/05/13 17:50:13 veego Exp $ */
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/*
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* Copyright (c) 1997-2001 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgment:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: restart.c,v 1.3.2.1 2001/01/10 03:23:12 ezk Exp
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amd.h>
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/*
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* Handle an amd restart.
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*
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* Scan through the mount list finding all "interesting" mount points.
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* Next hack up partial data structures and add the mounted file
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* system to the list of known filesystems. This will leave a
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* dangling reference to that filesystems, so when the filesystem is
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* finally inherited, an extra "free" must be done on it.
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*
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* This module relies on internal details of other components. If
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* you change something else make *sure* restart() still works.
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*/
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void
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restart(void)
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{
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/*
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* Read the existing mount table
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*/
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mntlist *ml, *mlp;
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/*
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* For each entry, find nfs, ufs or auto mounts
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* and create a partial am_node to represent it.
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*/
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for (mlp = ml = read_mtab("restart", mnttab_file_name);
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mlp;
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mlp = mlp->mnext) {
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mntent_t *me = mlp->mnt;
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am_ops *fs_ops = 0;
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if (STREQ(me->mnt_type, MNTTAB_TYPE_UFS)) {
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/*
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* UFS entry
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*/
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fs_ops = &ufs_ops;
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS)) {
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/*
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* NFS entry, or possibly an Amd entry...
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* The mnt_fsname for daemon mount points is
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* host:(pidXXX)
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* or (seen on Solaris)
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* host:daemon(pidXXX)
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*/
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char *colon = strchr(me->mnt_fsname, ':');
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if (colon && strstr(colon, "(pid")) {
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plog(XLOG_WARNING, "%s is an existing automount point", me->mnt_dir);
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fs_ops = &amfs_link_ops;
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} else {
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fs_ops = &nfs_ops;
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}
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#ifdef MNTTAB_TYPE_NFS3
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS3)) {
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fs_ops = &nfs_ops;
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#endif /* MNTTAB_TYPE_NFS3 */
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#ifdef MNTTAB_TYPE_LOFS
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_LOFS)) {
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fs_ops = &lofs_ops;
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#endif /* MNTTAB_TYPE_LOFS */
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#ifdef MNTTAB_TYPE_CDFS
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_CDFS)) {
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fs_ops = &cdfs_ops;
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#endif /* MNTTAB_TYPE_CDFS */
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#ifdef MNTTAB_TYPE_PCFS
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_PCFS)) {
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fs_ops = &pcfs_ops;
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#endif /* MNTTAB_TYPE_PCFS */
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#ifdef MNTTAB_TYPE_MFS
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} else if (STREQ(me->mnt_type, MNTTAB_TYPE_MFS)) {
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/*
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* MFS entry. Fake with a symlink.
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*/
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fs_ops = &amfs_link_ops;
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#endif /* MNTTAB_TYPE_MFS */
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} else {
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/*
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* Catch everything else with symlinks to
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* avoid recursive mounts. This is debatable...
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*/
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fs_ops = &amfs_link_ops;
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}
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/*
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* If we found something to do
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*/
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if (fs_ops) {
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mntfs *mf;
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am_opts mo;
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char *cp;
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cp = strchr(me->mnt_fsname, ':');
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/*
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* Partially fake up an opts structure
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*/
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mo.opt_rhost = 0;
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mo.opt_rfs = 0;
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if (cp) {
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*cp = '\0';
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mo.opt_rhost = strdup(me->mnt_fsname);
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mo.opt_rfs = strdup(cp + 1);
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*cp = ':';
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} else if (fs_ops->ffserver == find_nfs_srvr) {
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/*
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* Prototype 4.4 BSD used to end up here -
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* might as well keep the workaround for now
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*/
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plog(XLOG_WARNING, "NFS server entry assumed to be %s:/", me->mnt_fsname);
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mo.opt_rhost = strdup(me->mnt_fsname);
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mo.opt_rfs = strdup("/");
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me->mnt_fsname = str3cat(me->mnt_fsname, mo.opt_rhost, ":", "/");
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}
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mo.opt_fs = me->mnt_dir;
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mo.opt_opts = me->mnt_opts;
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/*
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* Make a new mounted filesystem
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*/
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mf = find_mntfs(fs_ops, &mo, me->mnt_dir,
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me->mnt_fsname, "", me->mnt_opts, "");
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if (mf->mf_refc == 1) {
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mf->mf_flags |= MFF_RESTART | MFF_MOUNTED;
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mf->mf_error = 0; /* Already mounted correctly */
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mf->mf_fo = 0;
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/*
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* If the restarted type is a link then
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* don't time out.
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*/
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if (fs_ops == &amfs_link_ops || fs_ops == &ufs_ops)
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mf->mf_flags |= MFF_RSTKEEP;
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if (fs_ops->fs_init) {
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/*
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* Don't care whether this worked since
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* it is checked again when the fs is
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* inherited.
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*/
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(void) (*fs_ops->fs_init) (mf);
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}
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plog(XLOG_INFO, "%s restarted fstype %s on %s",
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me->mnt_fsname, fs_ops->fs_type, me->mnt_dir);
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} else {
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/* Something strange happened - two mounts at the same place! */
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free_mntfs(mf);
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}
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/*
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* Clean up mo
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*/
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if (mo.opt_rhost)
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XFREE(mo.opt_rhost);
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if (mo.opt_rfs)
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XFREE(mo.opt_rfs);
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}
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}
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/*
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* Free the mount list
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*/
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free_mntlist(ml);
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}
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