2b3f398e4e
Without this patch, mountd would delete/load all exports from the exports file(s) when it receives a SIGHUP. This works fine for small exports file(s), but can take several seconds to do when there are large numbers (10000+) of exported file systems. Most of this time is spent doing the system calls that delete/export each of these file systems. When the "-S" option has been specified (the default these days), the nfsd threads are suspended for several seconds while the reload is done. This patch changes mountd so that it only does system calls for file systems where the exports have been changed/added/deleted as compared to the exports done for the previous load/reload of the exports file(s). Basically, when SIGHUP is posted to mountd, it saves the exportlist structures from the previous load and creates a new set of structures from the current exports file(s). Then it compares the current with the previous and only does system calls for cases that have been changed/added/deleted. The nfsd threads do not need to be suspended until the comparison step is being done. This results in a suspension period of milliseconds for a server with 10000+ exported file systems. There is some code using a LOGDEBUG() macro that allow runtime debugging output via syslog(LOG_DEBUG,...) that can be enabled by creating a file called /var/log/mountd.debug. This code is expected to be replaced with code that uses dtrace by cy@ in the near future, once issues w.r.t. dtrace in stable/12 have been resolved. The patch should not change the usage of the exports file(s), but improves the performance of reloading large exports file(s) where there are only a small number of changes done to the file(s). Tested by: pen@lysator.liu.se PR: 237860 Reviewed by: kib MFC after: 1 month Relnotes: yes Differential Revision: https://reviews.freebsd.org/D20487
3794 lines
92 KiB
C
3794 lines
92 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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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* Herb Hasler and Rick Macklem at The University of Guelph.
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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. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /*not lint*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95";
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#endif /*not lint*/
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/fcntl.h>
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#include <sys/fnv_hash.h>
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#include <sys/linker.h>
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#include <sys/module.h>
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#include <sys/mount.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#include <rpcsvc/mount.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfssvc.h>
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#include <nfsserver/nfs.h>
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#include <fs/nfs/nfsport.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <grp.h>
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#include <libutil.h>
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#include <limits.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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#include "mntopts.h"
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#ifdef DEBUG
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#include <stdarg.h>
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#endif
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/*
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* Structures for keeping the mount list and export list
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*/
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struct mountlist {
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char ml_host[MNTNAMLEN+1];
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char ml_dirp[MNTPATHLEN+1];
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SLIST_ENTRY(mountlist) next;
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};
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struct dirlist {
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struct dirlist *dp_left;
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struct dirlist *dp_right;
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int dp_flag;
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struct hostlist *dp_hosts; /* List of hosts this dir exported to */
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char *dp_dirp;
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};
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/* dp_flag bits */
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#define DP_DEFSET 0x1
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#define DP_HOSTSET 0x2
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struct exportlist {
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struct dirlist *ex_dirl;
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struct dirlist *ex_defdir;
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struct grouplist *ex_grphead;
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int ex_flag;
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fsid_t ex_fs;
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char *ex_fsdir;
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char *ex_indexfile;
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struct xucred ex_defanon;
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int ex_defexflags;
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int ex_numsecflavors;
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int ex_secflavors[MAXSECFLAVORS];
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int ex_defnumsecflavors;
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int ex_defsecflavors[MAXSECFLAVORS];
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SLIST_ENTRY(exportlist) entries;
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};
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/* ex_flag bits */
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#define EX_LINKED 0x1
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#define EX_DONE 0x2
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#define EX_DEFSET 0x4
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#define EX_PUBLICFH 0x8
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SLIST_HEAD(exportlisthead, exportlist);
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struct netmsk {
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struct sockaddr_storage nt_net;
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struct sockaddr_storage nt_mask;
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char *nt_name;
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};
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union grouptypes {
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struct addrinfo *gt_addrinfo;
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struct netmsk gt_net;
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};
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struct grouplist {
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int gr_type;
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union grouptypes gr_ptr;
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struct grouplist *gr_next;
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struct xucred gr_anon;
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int gr_exflags;
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int gr_flag;
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int gr_numsecflavors;
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int gr_secflavors[MAXSECFLAVORS];
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};
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/* Group types */
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#define GT_NULL 0x0
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#define GT_HOST 0x1
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#define GT_NET 0x2
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#define GT_DEFAULT 0x3
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#define GT_IGNORE 0x5
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/* Group flags */
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#define GR_FND 0x1
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struct hostlist {
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int ht_flag; /* Uses DP_xx bits */
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struct grouplist *ht_grp;
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struct hostlist *ht_next;
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};
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struct fhreturn {
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int fhr_flag;
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int fhr_vers;
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nfsfh_t fhr_fh;
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int fhr_numsecflavors;
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int *fhr_secflavors;
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};
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#define GETPORT_MAXTRY 20 /* Max tries to get a port # */
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/* Global defs */
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static char *add_expdir(struct dirlist **, char *, int);
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static void add_dlist(struct dirlist **, struct dirlist *,
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struct grouplist *, int, struct exportlist *,
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struct xucred *, int);
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static void add_mlist(char *, char *);
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static int check_dirpath(char *);
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static int check_options(struct dirlist *);
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static int checkmask(struct sockaddr *sa);
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static int chk_host(struct dirlist *, struct sockaddr *, int *, int *,
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int *, int **);
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static char *strsep_quote(char **stringp, const char *delim);
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static int create_service(struct netconfig *nconf);
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static void complete_service(struct netconfig *nconf, char *port_str);
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static void clearout_service(void);
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static void del_mlist(char *hostp, char *dirp);
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static struct dirlist *dirp_search(struct dirlist *, char *);
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static int do_export_mount(struct exportlist *, struct statfs *);
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static int do_mount(struct exportlist *, struct grouplist *, int,
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struct xucred *, char *, int, struct statfs *, int, int *);
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static int do_opt(char **, char **, struct exportlist *,
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struct grouplist *, int *, int *, struct xucred *);
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static struct exportlist *ex_search(fsid_t *, struct exportlisthead *);
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static struct exportlist *get_exp(void);
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static void free_dir(struct dirlist *);
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static void free_exp(struct exportlist *);
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static void free_grp(struct grouplist *);
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static void free_host(struct hostlist *);
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static void free_v4rootexp(void);
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static void get_exportlist_one(int);
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static void get_exportlist(int);
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static void insert_exports(struct exportlist *, struct exportlisthead *);
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static void free_exports(struct exportlisthead *);
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static void read_exportfile(int);
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static int compare_nmount_exportlist(struct iovec *, int, char *);
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static int compare_export(struct exportlist *, struct exportlist *);
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static int compare_cred(struct xucred *, struct xucred *);
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static int compare_secflavor(int *, int *, int);
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static void delete_export(struct iovec *, int, struct statfs *, char *);
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static int get_host(char *, struct grouplist *, struct grouplist *);
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static struct hostlist *get_ht(void);
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static int get_line(void);
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static void get_mountlist(void);
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static int get_net(char *, struct netmsk *, int);
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static void getexp_err(struct exportlist *, struct grouplist *, const char *);
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static struct grouplist *get_grp(void);
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static void hang_dirp(struct dirlist *, struct grouplist *,
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struct exportlist *, int, struct xucred *, int);
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static void huphandler(int sig);
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static int makemask(struct sockaddr_storage *ssp, int bitlen);
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static void mntsrv(struct svc_req *, SVCXPRT *);
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static void nextfield(char **, char **);
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static void out_of_mem(void);
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static void parsecred(char *, struct xucred *);
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static int parsesec(char *, struct exportlist *);
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static int put_exlist(struct dirlist *, XDR *, struct dirlist *,
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int *, int);
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static void *sa_rawaddr(struct sockaddr *sa, int *nbytes);
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static int sacmp(struct sockaddr *sa1, struct sockaddr *sa2,
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struct sockaddr *samask);
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static int scan_tree(struct dirlist *, struct sockaddr *);
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static void usage(void);
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static int xdr_dir(XDR *, char *);
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static int xdr_explist(XDR *, caddr_t);
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static int xdr_explist_brief(XDR *, caddr_t);
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static int xdr_explist_common(XDR *, caddr_t, int);
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static int xdr_fhs(XDR *, caddr_t);
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static int xdr_mlist(XDR *, caddr_t);
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static void terminate(int);
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#define EXPHASH(f) (fnv_32_buf((f), sizeof(fsid_t), 0) % exphashsize)
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static struct exportlisthead *exphead = NULL;
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static struct exportlisthead *oldexphead = NULL;
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static int exphashsize = 0;
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static SLIST_HEAD(, mountlist) mlhead = SLIST_HEAD_INITIALIZER(&mlhead);
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static char *exnames_default[2] = { _PATH_EXPORTS, NULL };
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static char **exnames;
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static char **hosts = NULL;
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static struct xucred def_anon = {
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XUCRED_VERSION,
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(uid_t)65534,
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1,
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{ (gid_t)65533 },
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{ NULL }
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};
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static int force_v2 = 0;
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static int resvport_only = 1;
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static int nhosts = 0;
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static int dir_only = 1;
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static int dolog = 0;
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static int got_sighup = 0;
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static int xcreated = 0;
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static char *svcport_str = NULL;
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static int mallocd_svcport = 0;
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static int *sock_fd;
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static int sock_fdcnt;
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static int sock_fdpos;
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static int suspend_nfsd = 0;
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static int opt_flags;
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static int have_v6 = 1;
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static int v4root_phase = 0;
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static char v4root_dirpath[PATH_MAX + 1];
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static struct exportlist *v4root_ep = NULL;
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static int has_publicfh = 0;
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static int has_set_publicfh = 0;
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static struct pidfh *pfh = NULL;
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/* Bits for opt_flags above */
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#define OP_MAPROOT 0x01
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#define OP_MAPALL 0x02
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/* 0x4 free */
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#define OP_MASK 0x08
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#define OP_NET 0x10
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#define OP_ALLDIRS 0x40
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#define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */
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#define OP_QUIET 0x100
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#define OP_MASKLEN 0x200
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#define OP_SEC 0x400
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#ifdef DEBUG
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static int debug = 1;
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static void SYSLOG(int, const char *, ...) __printflike(2, 3);
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#define syslog SYSLOG
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#else
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static int debug = 0;
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#endif
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/*
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* The LOGDEBUG() syslog() calls are always compiled into the daemon.
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* To enable them, create a file at _PATH_MOUNTDDEBUG. This file can be empty.
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* To disable the logging, just delete the file at _PATH_MOUNTDDEBUG.
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*/
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static int logdebug = 0;
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#define LOGDEBUG(format, ...) \
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(logdebug ? syslog(LOG_DEBUG, format, ## __VA_ARGS__) : 0)
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/*
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* Similar to strsep(), but it allows for quoted strings
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* and escaped characters.
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*
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* It returns the string (or NULL, if *stringp is NULL),
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* which is a de-quoted version of the string if necessary.
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*
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* It modifies *stringp in place.
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*/
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static char *
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strsep_quote(char **stringp, const char *delim)
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{
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char *srcptr, *dstptr, *retval;
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char quot = 0;
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if (stringp == NULL || *stringp == NULL)
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return (NULL);
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srcptr = dstptr = retval = *stringp;
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while (*srcptr) {
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/*
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* We're looking for several edge cases here.
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* First: if we're in quote state (quot != 0),
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* then we ignore the delim characters, but otherwise
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* process as normal, unless it is the quote character.
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* Second: if the current character is a backslash,
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* we take the next character as-is, without checking
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* for delim, quote, or backslash. Exception: if the
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* next character is a NUL, that's the end of the string.
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* Third: if the character is a quote character, we toggle
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* quote state.
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* Otherwise: check the current character for NUL, or
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* being in delim, and end the string if either is true.
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*/
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if (*srcptr == '\\') {
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srcptr++;
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/*
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* The edge case here is if the next character
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* is NUL, we want to stop processing. But if
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* it's not NUL, then we simply want to copy it.
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*/
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if (*srcptr) {
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*dstptr++ = *srcptr++;
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}
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continue;
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}
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if (quot == 0 && (*srcptr == '\'' || *srcptr == '"')) {
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quot = *srcptr++;
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continue;
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}
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if (quot && *srcptr == quot) {
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/* End of the quoted part */
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quot = 0;
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srcptr++;
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continue;
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}
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if (!quot && strchr(delim, *srcptr))
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break;
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*dstptr++ = *srcptr++;
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}
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*dstptr = 0; /* Terminate the string */
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*stringp = (*srcptr == '\0') ? NULL : srcptr + 1;
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return (retval);
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}
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|
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/*
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* Mountd server for NFS mount protocol as described in:
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* NFS: Network File System Protocol Specification, RFC1094, Appendix A
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* The optional arguments are the exports file name
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* default: _PATH_EXPORTS
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* and "-n" to allow nonroot mount.
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*/
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int
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main(int argc, char **argv)
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{
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fd_set readfds;
|
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struct netconfig *nconf;
|
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char *endptr, **hosts_bak;
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void *nc_handle;
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|
pid_t otherpid;
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in_port_t svcport;
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int c, k, s;
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int maxrec = RPC_MAXDATASIZE;
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int attempt_cnt, port_len, port_pos, ret;
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char **port_list;
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|
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/* Check that another mountd isn't already running. */
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pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid);
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if (pfh == NULL) {
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if (errno == EEXIST)
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errx(1, "mountd already running, pid: %d.", otherpid);
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warn("cannot open or create pidfile");
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}
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s < 0)
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have_v6 = 0;
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else
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close(s);
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|
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while ((c = getopt(argc, argv, "2deh:lnp:rS")) != -1)
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switch (c) {
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case '2':
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force_v2 = 1;
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break;
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case 'e':
|
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/* now a no-op, since this is the default */
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break;
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case 'n':
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resvport_only = 0;
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break;
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case 'r':
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dir_only = 0;
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break;
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case 'd':
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debug = debug ? 0 : 1;
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break;
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case 'l':
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dolog = 1;
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break;
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case 'p':
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endptr = NULL;
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svcport = (in_port_t)strtoul(optarg, &endptr, 10);
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if (endptr == NULL || *endptr != '\0' ||
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svcport == 0 || svcport >= IPPORT_MAX)
|
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usage();
|
|
svcport_str = strdup(optarg);
|
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break;
|
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case 'h':
|
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++nhosts;
|
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hosts_bak = hosts;
|
|
hosts_bak = realloc(hosts, nhosts * sizeof(char *));
|
|
if (hosts_bak == NULL) {
|
|
if (hosts != NULL) {
|
|
for (k = 0; k < nhosts; k++)
|
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free(hosts[k]);
|
|
free(hosts);
|
|
out_of_mem();
|
|
}
|
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}
|
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hosts = hosts_bak;
|
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hosts[nhosts - 1] = strdup(optarg);
|
|
if (hosts[nhosts - 1] == NULL) {
|
|
for (k = 0; k < (nhosts - 1); k++)
|
|
free(hosts[k]);
|
|
free(hosts);
|
|
out_of_mem();
|
|
}
|
|
break;
|
|
case 'S':
|
|
suspend_nfsd = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
if (modfind("nfsd") < 0) {
|
|
/* Not present in kernel, try loading it */
|
|
if (kldload("nfsd") < 0 || modfind("nfsd") < 0)
|
|
errx(1, "NFS server is not available");
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc > 0)
|
|
exnames = argv;
|
|
else
|
|
exnames = exnames_default;
|
|
openlog("mountd", LOG_PID, LOG_DAEMON);
|
|
if (debug)
|
|
warnx("getting export list");
|
|
get_exportlist(0);
|
|
if (debug)
|
|
warnx("getting mount list");
|
|
get_mountlist();
|
|
if (debug)
|
|
warnx("here we go");
|
|
if (debug == 0) {
|
|
daemon(0, 0);
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
}
|
|
signal(SIGHUP, huphandler);
|
|
signal(SIGTERM, terminate);
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
pidfile_write(pfh);
|
|
|
|
rpcb_unset(MOUNTPROG, MOUNTVERS, NULL);
|
|
rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL);
|
|
rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
|
|
|
|
if (!resvport_only) {
|
|
if (sysctlbyname("vfs.nfsd.nfs_privport", NULL, NULL,
|
|
&resvport_only, sizeof(resvport_only)) != 0 &&
|
|
errno != ENOENT) {
|
|
syslog(LOG_ERR, "sysctl: %m");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If no hosts were specified, add a wildcard entry to bind to
|
|
* INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
|
|
* list.
|
|
*/
|
|
if (nhosts == 0) {
|
|
hosts = malloc(sizeof(char *));
|
|
if (hosts == NULL)
|
|
out_of_mem();
|
|
hosts[0] = "*";
|
|
nhosts = 1;
|
|
} else {
|
|
hosts_bak = hosts;
|
|
if (have_v6) {
|
|
hosts_bak = realloc(hosts, (nhosts + 2) *
|
|
sizeof(char *));
|
|
if (hosts_bak == NULL) {
|
|
for (k = 0; k < nhosts; k++)
|
|
free(hosts[k]);
|
|
free(hosts);
|
|
out_of_mem();
|
|
} else
|
|
hosts = hosts_bak;
|
|
nhosts += 2;
|
|
hosts[nhosts - 2] = "::1";
|
|
} else {
|
|
hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
|
|
if (hosts_bak == NULL) {
|
|
for (k = 0; k < nhosts; k++)
|
|
free(hosts[k]);
|
|
free(hosts);
|
|
out_of_mem();
|
|
} else {
|
|
nhosts += 1;
|
|
hosts = hosts_bak;
|
|
}
|
|
}
|
|
|
|
hosts[nhosts - 1] = "127.0.0.1";
|
|
}
|
|
|
|
attempt_cnt = 1;
|
|
sock_fdcnt = 0;
|
|
sock_fd = NULL;
|
|
port_list = NULL;
|
|
port_len = 0;
|
|
nc_handle = setnetconfig();
|
|
while ((nconf = getnetconfig(nc_handle))) {
|
|
if (nconf->nc_flag & NC_VISIBLE) {
|
|
if (have_v6 == 0 && strcmp(nconf->nc_protofmly,
|
|
"inet6") == 0) {
|
|
/* DO NOTHING */
|
|
} else {
|
|
ret = create_service(nconf);
|
|
if (ret == 1)
|
|
/* Ignore this call */
|
|
continue;
|
|
if (ret < 0) {
|
|
/*
|
|
* Failed to bind port, so close off
|
|
* all sockets created and try again
|
|
* if the port# was dynamically
|
|
* assigned via bind(2).
|
|
*/
|
|
clearout_service();
|
|
if (mallocd_svcport != 0 &&
|
|
attempt_cnt < GETPORT_MAXTRY) {
|
|
free(svcport_str);
|
|
svcport_str = NULL;
|
|
mallocd_svcport = 0;
|
|
} else {
|
|
errno = EADDRINUSE;
|
|
syslog(LOG_ERR,
|
|
"bindresvport_sa: %m");
|
|
exit(1);
|
|
}
|
|
|
|
/* Start over at the first service. */
|
|
free(sock_fd);
|
|
sock_fdcnt = 0;
|
|
sock_fd = NULL;
|
|
nc_handle = setnetconfig();
|
|
attempt_cnt++;
|
|
} else if (mallocd_svcport != 0 &&
|
|
attempt_cnt == GETPORT_MAXTRY) {
|
|
/*
|
|
* For the last attempt, allow
|
|
* different port #s for each nconf
|
|
* by saving the svcport_str and
|
|
* setting it back to NULL.
|
|
*/
|
|
port_list = realloc(port_list,
|
|
(port_len + 1) * sizeof(char *));
|
|
if (port_list == NULL)
|
|
out_of_mem();
|
|
port_list[port_len++] = svcport_str;
|
|
svcport_str = NULL;
|
|
mallocd_svcport = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Successfully bound the ports, so call complete_service() to
|
|
* do the rest of the setup on the service(s).
|
|
*/
|
|
sock_fdpos = 0;
|
|
port_pos = 0;
|
|
nc_handle = setnetconfig();
|
|
while ((nconf = getnetconfig(nc_handle))) {
|
|
if (nconf->nc_flag & NC_VISIBLE) {
|
|
if (have_v6 == 0 && strcmp(nconf->nc_protofmly,
|
|
"inet6") == 0) {
|
|
/* DO NOTHING */
|
|
} else if (port_list != NULL) {
|
|
if (port_pos >= port_len) {
|
|
syslog(LOG_ERR, "too many port#s");
|
|
exit(1);
|
|
}
|
|
complete_service(nconf, port_list[port_pos++]);
|
|
} else
|
|
complete_service(nconf, svcport_str);
|
|
}
|
|
}
|
|
endnetconfig(nc_handle);
|
|
free(sock_fd);
|
|
if (port_list != NULL) {
|
|
for (port_pos = 0; port_pos < port_len; port_pos++)
|
|
free(port_list[port_pos]);
|
|
free(port_list);
|
|
}
|
|
|
|
if (xcreated == 0) {
|
|
syslog(LOG_ERR, "could not create any services");
|
|
exit(1);
|
|
}
|
|
|
|
/* Expand svc_run() here so that we can call get_exportlist(). */
|
|
for (;;) {
|
|
if (got_sighup) {
|
|
get_exportlist(1);
|
|
got_sighup = 0;
|
|
}
|
|
readfds = svc_fdset;
|
|
switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
|
|
case -1:
|
|
if (errno == EINTR)
|
|
continue;
|
|
syslog(LOG_ERR, "mountd died: select: %m");
|
|
exit(1);
|
|
case 0:
|
|
continue;
|
|
default:
|
|
svc_getreqset(&readfds);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This routine creates and binds sockets on the appropriate
|
|
* addresses. It gets called one time for each transport.
|
|
* It returns 0 upon success, 1 for ingore the call and -1 to indicate
|
|
* bind failed with EADDRINUSE.
|
|
* Any file descriptors that have been created are stored in sock_fd and
|
|
* the total count of them is maintained in sock_fdcnt.
|
|
*/
|
|
static int
|
|
create_service(struct netconfig *nconf)
|
|
{
|
|
struct addrinfo hints, *res = NULL;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
struct __rpc_sockinfo si;
|
|
int aicode;
|
|
int fd;
|
|
int nhostsbak;
|
|
int one = 1;
|
|
int r;
|
|
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
|
|
int mallocd_res;
|
|
|
|
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
|
|
(nconf->nc_semantics != NC_TPI_COTS) &&
|
|
(nconf->nc_semantics != NC_TPI_COTS_ORD))
|
|
return (1); /* not my type */
|
|
|
|
/*
|
|
* XXX - using RPC library internal functions.
|
|
*/
|
|
if (!__rpc_nconf2sockinfo(nconf, &si)) {
|
|
syslog(LOG_ERR, "cannot get information for %s",
|
|
nconf->nc_netid);
|
|
return (1);
|
|
}
|
|
|
|
/* Get mountd's address on this transport */
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_family = si.si_af;
|
|
hints.ai_socktype = si.si_socktype;
|
|
hints.ai_protocol = si.si_proto;
|
|
|
|
/*
|
|
* Bind to specific IPs if asked to
|
|
*/
|
|
nhostsbak = nhosts;
|
|
while (nhostsbak > 0) {
|
|
--nhostsbak;
|
|
sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
|
|
if (sock_fd == NULL)
|
|
out_of_mem();
|
|
sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */
|
|
mallocd_res = 0;
|
|
|
|
hints.ai_flags = AI_PASSIVE;
|
|
|
|
/*
|
|
* XXX - using RPC library internal functions.
|
|
*/
|
|
if ((fd = __rpc_nconf2fd(nconf)) < 0) {
|
|
int non_fatal = 0;
|
|
if (errno == EAFNOSUPPORT &&
|
|
nconf->nc_semantics != NC_TPI_CLTS)
|
|
non_fatal = 1;
|
|
|
|
syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
|
|
"cannot create socket for %s", nconf->nc_netid);
|
|
if (non_fatal != 0)
|
|
continue;
|
|
exit(1);
|
|
}
|
|
|
|
switch (hints.ai_family) {
|
|
case AF_INET:
|
|
if (inet_pton(AF_INET, hosts[nhostsbak],
|
|
host_addr) == 1) {
|
|
hints.ai_flags |= AI_NUMERICHOST;
|
|
} else {
|
|
/*
|
|
* Skip if we have an AF_INET6 address.
|
|
*/
|
|
if (inet_pton(AF_INET6, hosts[nhostsbak],
|
|
host_addr) == 1) {
|
|
close(fd);
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
if (inet_pton(AF_INET6, hosts[nhostsbak],
|
|
host_addr) == 1) {
|
|
hints.ai_flags |= AI_NUMERICHOST;
|
|
} else {
|
|
/*
|
|
* Skip if we have an AF_INET address.
|
|
*/
|
|
if (inet_pton(AF_INET, hosts[nhostsbak],
|
|
host_addr) == 1) {
|
|
close(fd);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We're doing host-based access checks here, so don't
|
|
* allow v4-in-v6 to confuse things. The kernel will
|
|
* disable it by default on NFS sockets too.
|
|
*/
|
|
if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one,
|
|
sizeof one) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't disable v4-in-v6 on IPv6 socket");
|
|
exit(1);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If no hosts were specified, just bind to INADDR_ANY
|
|
*/
|
|
if (strcmp("*", hosts[nhostsbak]) == 0) {
|
|
if (svcport_str == NULL) {
|
|
res = malloc(sizeof(struct addrinfo));
|
|
if (res == NULL)
|
|
out_of_mem();
|
|
mallocd_res = 1;
|
|
res->ai_flags = hints.ai_flags;
|
|
res->ai_family = hints.ai_family;
|
|
res->ai_protocol = hints.ai_protocol;
|
|
switch (res->ai_family) {
|
|
case AF_INET:
|
|
sin = malloc(sizeof(struct sockaddr_in));
|
|
if (sin == NULL)
|
|
out_of_mem();
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_port = htons(0);
|
|
sin->sin_addr.s_addr = htonl(INADDR_ANY);
|
|
res->ai_addr = (struct sockaddr*) sin;
|
|
res->ai_addrlen = (socklen_t)
|
|
sizeof(struct sockaddr_in);
|
|
break;
|
|
case AF_INET6:
|
|
sin6 = malloc(sizeof(struct sockaddr_in6));
|
|
if (sin6 == NULL)
|
|
out_of_mem();
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_port = htons(0);
|
|
sin6->sin6_addr = in6addr_any;
|
|
res->ai_addr = (struct sockaddr*) sin6;
|
|
res->ai_addrlen = (socklen_t)
|
|
sizeof(struct sockaddr_in6);
|
|
break;
|
|
default:
|
|
syslog(LOG_ERR, "bad addr fam %d",
|
|
res->ai_family);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
if ((aicode = getaddrinfo(NULL, svcport_str,
|
|
&hints, &res)) != 0) {
|
|
syslog(LOG_ERR,
|
|
"cannot get local address for %s: %s",
|
|
nconf->nc_netid,
|
|
gai_strerror(aicode));
|
|
close(fd);
|
|
continue;
|
|
}
|
|
}
|
|
} else {
|
|
if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
|
|
&hints, &res)) != 0) {
|
|
syslog(LOG_ERR,
|
|
"cannot get local address for %s: %s",
|
|
nconf->nc_netid, gai_strerror(aicode));
|
|
close(fd);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Store the fd. */
|
|
sock_fd[sock_fdcnt - 1] = fd;
|
|
|
|
/* Now, attempt the bind. */
|
|
r = bindresvport_sa(fd, res->ai_addr);
|
|
if (r != 0) {
|
|
if (errno == EADDRINUSE && mallocd_svcport != 0) {
|
|
if (mallocd_res != 0) {
|
|
free(res->ai_addr);
|
|
free(res);
|
|
} else
|
|
freeaddrinfo(res);
|
|
return (-1);
|
|
}
|
|
syslog(LOG_ERR, "bindresvport_sa: %m");
|
|
exit(1);
|
|
}
|
|
|
|
if (svcport_str == NULL) {
|
|
svcport_str = malloc(NI_MAXSERV * sizeof(char));
|
|
if (svcport_str == NULL)
|
|
out_of_mem();
|
|
mallocd_svcport = 1;
|
|
|
|
if (getnameinfo(res->ai_addr,
|
|
res->ai_addr->sa_len, NULL, NI_MAXHOST,
|
|
svcport_str, NI_MAXSERV * sizeof(char),
|
|
NI_NUMERICHOST | NI_NUMERICSERV))
|
|
errx(1, "Cannot get port number");
|
|
}
|
|
if (mallocd_res != 0) {
|
|
free(res->ai_addr);
|
|
free(res);
|
|
} else
|
|
freeaddrinfo(res);
|
|
res = NULL;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called after all the create_service() calls have succeeded, to complete
|
|
* the setup and registration.
|
|
*/
|
|
static void
|
|
complete_service(struct netconfig *nconf, char *port_str)
|
|
{
|
|
struct addrinfo hints, *res = NULL;
|
|
struct __rpc_sockinfo si;
|
|
struct netbuf servaddr;
|
|
SVCXPRT *transp = NULL;
|
|
int aicode, fd, nhostsbak;
|
|
int registered = 0;
|
|
|
|
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
|
|
(nconf->nc_semantics != NC_TPI_COTS) &&
|
|
(nconf->nc_semantics != NC_TPI_COTS_ORD))
|
|
return; /* not my type */
|
|
|
|
/*
|
|
* XXX - using RPC library internal functions.
|
|
*/
|
|
if (!__rpc_nconf2sockinfo(nconf, &si)) {
|
|
syslog(LOG_ERR, "cannot get information for %s",
|
|
nconf->nc_netid);
|
|
return;
|
|
}
|
|
|
|
nhostsbak = nhosts;
|
|
while (nhostsbak > 0) {
|
|
--nhostsbak;
|
|
if (sock_fdpos >= sock_fdcnt) {
|
|
/* Should never happen. */
|
|
syslog(LOG_ERR, "Ran out of socket fd's");
|
|
return;
|
|
}
|
|
fd = sock_fd[sock_fdpos++];
|
|
if (fd < 0)
|
|
continue;
|
|
|
|
/*
|
|
* Using -1 tells listen(2) to use
|
|
* kern.ipc.soacceptqueue for the backlog.
|
|
*/
|
|
if (nconf->nc_semantics != NC_TPI_CLTS)
|
|
listen(fd, -1);
|
|
|
|
if (nconf->nc_semantics == NC_TPI_CLTS )
|
|
transp = svc_dg_create(fd, 0, 0);
|
|
else
|
|
transp = svc_vc_create(fd, RPC_MAXDATASIZE,
|
|
RPC_MAXDATASIZE);
|
|
|
|
if (transp != (SVCXPRT *) NULL) {
|
|
if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv,
|
|
NULL))
|
|
syslog(LOG_ERR,
|
|
"can't register %s MOUNTVERS service",
|
|
nconf->nc_netid);
|
|
if (!force_v2) {
|
|
if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3,
|
|
mntsrv, NULL))
|
|
syslog(LOG_ERR,
|
|
"can't register %s MOUNTVERS3 service",
|
|
nconf->nc_netid);
|
|
}
|
|
} else
|
|
syslog(LOG_WARNING, "can't create %s services",
|
|
nconf->nc_netid);
|
|
|
|
if (registered == 0) {
|
|
registered = 1;
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = si.si_af;
|
|
hints.ai_socktype = si.si_socktype;
|
|
hints.ai_protocol = si.si_proto;
|
|
|
|
if ((aicode = getaddrinfo(NULL, port_str, &hints,
|
|
&res)) != 0) {
|
|
syslog(LOG_ERR, "cannot get local address: %s",
|
|
gai_strerror(aicode));
|
|
exit(1);
|
|
}
|
|
|
|
servaddr.buf = malloc(res->ai_addrlen);
|
|
memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
|
|
servaddr.len = res->ai_addrlen;
|
|
|
|
rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr);
|
|
rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr);
|
|
|
|
xcreated++;
|
|
freeaddrinfo(res);
|
|
}
|
|
} /* end while */
|
|
}
|
|
|
|
/*
|
|
* Clear out sockets after a failure to bind one of them, so that the
|
|
* cycle of socket creation/binding can start anew.
|
|
*/
|
|
static void
|
|
clearout_service(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sock_fdcnt; i++) {
|
|
if (sock_fd[i] >= 0) {
|
|
shutdown(sock_fd[i], SHUT_RDWR);
|
|
close(sock_fd[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] "
|
|
"[-S] [-h <bindip>] [export_file ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* The mount rpc service
|
|
*/
|
|
void
|
|
mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
|
|
{
|
|
struct exportlist *ep;
|
|
struct dirlist *dp;
|
|
struct fhreturn fhr;
|
|
struct stat stb;
|
|
struct statfs fsb;
|
|
char host[NI_MAXHOST], numerichost[NI_MAXHOST];
|
|
int lookup_failed = 1;
|
|
struct sockaddr *saddr;
|
|
u_short sport;
|
|
char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN];
|
|
int bad = 0, defset, hostset;
|
|
sigset_t sighup_mask;
|
|
int numsecflavors, *secflavorsp;
|
|
|
|
sigemptyset(&sighup_mask);
|
|
sigaddset(&sighup_mask, SIGHUP);
|
|
saddr = svc_getrpccaller(transp)->buf;
|
|
switch (saddr->sa_family) {
|
|
case AF_INET6:
|
|
sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
|
|
break;
|
|
case AF_INET:
|
|
sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
|
|
break;
|
|
default:
|
|
syslog(LOG_ERR, "request from unknown address family");
|
|
return;
|
|
}
|
|
switch (rqstp->rq_proc) {
|
|
case MOUNTPROC_MNT:
|
|
case MOUNTPROC_UMNT:
|
|
case MOUNTPROC_UMNTALL:
|
|
lookup_failed = getnameinfo(saddr, saddr->sa_len, host,
|
|
sizeof host, NULL, 0, 0);
|
|
}
|
|
getnameinfo(saddr, saddr->sa_len, numerichost,
|
|
sizeof numerichost, NULL, 0, NI_NUMERICHOST);
|
|
switch (rqstp->rq_proc) {
|
|
case NULLPROC:
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
return;
|
|
case MOUNTPROC_MNT:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"mount request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
|
|
syslog(LOG_NOTICE, "undecodable mount request from %s",
|
|
numerichost);
|
|
svcerr_decode(transp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Get the real pathname and make sure it is a directory
|
|
* or a regular file if the -r option was specified
|
|
* and it exists.
|
|
*/
|
|
if (realpath(rpcpath, dirpath) == NULL ||
|
|
stat(dirpath, &stb) < 0 ||
|
|
statfs(dirpath, &fsb) < 0) {
|
|
chdir("/"); /* Just in case realpath doesn't */
|
|
syslog(LOG_NOTICE,
|
|
"mount request from %s for non existent path %s",
|
|
numerichost, dirpath);
|
|
if (debug)
|
|
warnx("stat failed on %s", dirpath);
|
|
bad = ENOENT; /* We will send error reply later */
|
|
}
|
|
if (!bad &&
|
|
!S_ISDIR(stb.st_mode) &&
|
|
(dir_only || !S_ISREG(stb.st_mode))) {
|
|
syslog(LOG_NOTICE,
|
|
"mount request from %s for non-directory path %s",
|
|
numerichost, dirpath);
|
|
if (debug)
|
|
warnx("mounting non-directory %s", dirpath);
|
|
bad = ENOTDIR; /* We will send error reply later */
|
|
}
|
|
|
|
/* Check in the exports list */
|
|
sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
|
|
if (bad)
|
|
ep = NULL;
|
|
else
|
|
ep = ex_search(&fsb.f_fsid, exphead);
|
|
hostset = defset = 0;
|
|
if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset,
|
|
&numsecflavors, &secflavorsp) ||
|
|
((dp = dirp_search(ep->ex_dirl, dirpath)) &&
|
|
chk_host(dp, saddr, &defset, &hostset, &numsecflavors,
|
|
&secflavorsp)) ||
|
|
(defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
|
|
scan_tree(ep->ex_dirl, saddr) == 0))) {
|
|
if (bad) {
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
|
|
(caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
}
|
|
if (hostset & DP_HOSTSET) {
|
|
fhr.fhr_flag = hostset;
|
|
fhr.fhr_numsecflavors = numsecflavors;
|
|
fhr.fhr_secflavors = secflavorsp;
|
|
} else {
|
|
fhr.fhr_flag = defset;
|
|
fhr.fhr_numsecflavors = ep->ex_defnumsecflavors;
|
|
fhr.fhr_secflavors = ep->ex_defsecflavors;
|
|
}
|
|
fhr.fhr_vers = rqstp->rq_vers;
|
|
/* Get the file handle */
|
|
memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
|
|
if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
|
|
bad = errno;
|
|
syslog(LOG_ERR, "can't get fh for %s", dirpath);
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
|
|
(caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
}
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs,
|
|
(caddr_t)&fhr))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
add_mlist(host, dirpath);
|
|
else
|
|
add_mlist(numerichost, dirpath);
|
|
if (debug)
|
|
warnx("mount successful");
|
|
if (dolog)
|
|
syslog(LOG_NOTICE,
|
|
"mount request succeeded from %s for %s",
|
|
numerichost, dirpath);
|
|
} else {
|
|
if (!bad)
|
|
bad = EACCES;
|
|
syslog(LOG_NOTICE,
|
|
"mount request denied from %s for %s",
|
|
numerichost, dirpath);
|
|
}
|
|
|
|
if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long,
|
|
(caddr_t)&bad))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return;
|
|
case MOUNTPROC_DUMP:
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
else if (dolog)
|
|
syslog(LOG_NOTICE,
|
|
"dump request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
case MOUNTPROC_UMNT:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"umount request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
|
|
syslog(LOG_NOTICE, "undecodable umount request from %s",
|
|
numerichost);
|
|
svcerr_decode(transp);
|
|
return;
|
|
}
|
|
if (realpath(rpcpath, dirpath) == NULL) {
|
|
syslog(LOG_NOTICE, "umount request from %s "
|
|
"for non existent path %s",
|
|
numerichost, dirpath);
|
|
}
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
del_mlist(host, dirpath);
|
|
del_mlist(numerichost, dirpath);
|
|
if (dolog)
|
|
syslog(LOG_NOTICE,
|
|
"umount request succeeded from %s for %s",
|
|
numerichost, dirpath);
|
|
return;
|
|
case MOUNTPROC_UMNTALL:
|
|
if (sport >= IPPORT_RESERVED && resvport_only) {
|
|
syslog(LOG_NOTICE,
|
|
"umountall request from %s from unprivileged port",
|
|
numerichost);
|
|
svcerr_weakauth(transp);
|
|
return;
|
|
}
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (!lookup_failed)
|
|
del_mlist(host, NULL);
|
|
del_mlist(numerichost, NULL);
|
|
if (dolog)
|
|
syslog(LOG_NOTICE,
|
|
"umountall request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
case MOUNTPROC_EXPORT:
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL))
|
|
if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief,
|
|
(caddr_t)NULL))
|
|
syslog(LOG_ERR, "can't send reply");
|
|
if (dolog)
|
|
syslog(LOG_NOTICE,
|
|
"export request succeeded from %s",
|
|
numerichost);
|
|
return;
|
|
default:
|
|
svcerr_noproc(transp);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Xdr conversion for a dirpath string
|
|
*/
|
|
static int
|
|
xdr_dir(XDR *xdrsp, char *dirp)
|
|
{
|
|
return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
|
|
}
|
|
|
|
/*
|
|
* Xdr routine to generate file handle reply
|
|
*/
|
|
static int
|
|
xdr_fhs(XDR *xdrsp, caddr_t cp)
|
|
{
|
|
struct fhreturn *fhrp = (struct fhreturn *)cp;
|
|
u_long ok = 0, len, auth;
|
|
int i;
|
|
|
|
if (!xdr_long(xdrsp, &ok))
|
|
return (0);
|
|
switch (fhrp->fhr_vers) {
|
|
case 1:
|
|
return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
|
|
case 3:
|
|
len = NFSX_V3FH;
|
|
if (!xdr_long(xdrsp, &len))
|
|
return (0);
|
|
if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
|
|
return (0);
|
|
if (fhrp->fhr_numsecflavors) {
|
|
if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors))
|
|
return (0);
|
|
for (i = 0; i < fhrp->fhr_numsecflavors; i++)
|
|
if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i]))
|
|
return (0);
|
|
return (1);
|
|
} else {
|
|
auth = AUTH_SYS;
|
|
len = 1;
|
|
if (!xdr_long(xdrsp, &len))
|
|
return (0);
|
|
return (xdr_long(xdrsp, &auth));
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
xdr_mlist(XDR *xdrsp, caddr_t cp __unused)
|
|
{
|
|
struct mountlist *mlp;
|
|
int true = 1;
|
|
int false = 0;
|
|
char *strp;
|
|
|
|
SLIST_FOREACH(mlp, &mlhead, next) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (0);
|
|
strp = &mlp->ml_host[0];
|
|
if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
|
|
return (0);
|
|
strp = &mlp->ml_dirp[0];
|
|
if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
|
|
return (0);
|
|
}
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Xdr conversion for export list
|
|
*/
|
|
static int
|
|
xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief)
|
|
{
|
|
struct exportlist *ep;
|
|
int false = 0;
|
|
int putdef;
|
|
sigset_t sighup_mask;
|
|
int i;
|
|
|
|
sigemptyset(&sighup_mask);
|
|
sigaddset(&sighup_mask, SIGHUP);
|
|
sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
|
|
|
|
for (i = 0; i < exphashsize; i++)
|
|
SLIST_FOREACH(ep, &exphead[i], entries) {
|
|
putdef = 0;
|
|
if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir,
|
|
&putdef, brief))
|
|
goto errout;
|
|
if (ep->ex_defdir && putdef == 0 &&
|
|
put_exlist(ep->ex_defdir, xdrsp, NULL,
|
|
&putdef, brief))
|
|
goto errout;
|
|
}
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (0);
|
|
return (1);
|
|
errout:
|
|
sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called from xdr_explist() to traverse the tree and export the
|
|
* directory paths.
|
|
*/
|
|
static int
|
|
put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp,
|
|
int brief)
|
|
{
|
|
struct grouplist *grp;
|
|
struct hostlist *hp;
|
|
int true = 1;
|
|
int false = 0;
|
|
int gotalldir = 0;
|
|
char *strp;
|
|
|
|
if (dp) {
|
|
if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief))
|
|
return (1);
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = dp->dp_dirp;
|
|
if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
|
|
return (1);
|
|
if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
|
|
gotalldir = 1;
|
|
*putdefp = 1;
|
|
}
|
|
if (brief) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = "(...)";
|
|
if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
|
|
return (1);
|
|
} else if ((dp->dp_flag & DP_DEFSET) == 0 &&
|
|
(gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
|
|
hp = dp->dp_hosts;
|
|
while (hp) {
|
|
grp = hp->ht_grp;
|
|
if (grp->gr_type == GT_HOST) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
|
|
if (!xdr_string(xdrsp, &strp,
|
|
MNTNAMLEN))
|
|
return (1);
|
|
} else if (grp->gr_type == GT_NET) {
|
|
if (!xdr_bool(xdrsp, &true))
|
|
return (1);
|
|
strp = grp->gr_ptr.gt_net.nt_name;
|
|
if (!xdr_string(xdrsp, &strp,
|
|
MNTNAMLEN))
|
|
return (1);
|
|
}
|
|
hp = hp->ht_next;
|
|
if (gotalldir && hp == (struct hostlist *)NULL) {
|
|
hp = adp->dp_hosts;
|
|
gotalldir = 0;
|
|
}
|
|
}
|
|
}
|
|
if (!xdr_bool(xdrsp, &false))
|
|
return (1);
|
|
if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief))
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
xdr_explist(XDR *xdrsp, caddr_t cp)
|
|
{
|
|
|
|
return xdr_explist_common(xdrsp, cp, 0);
|
|
}
|
|
|
|
static int
|
|
xdr_explist_brief(XDR *xdrsp, caddr_t cp)
|
|
{
|
|
|
|
return xdr_explist_common(xdrsp, cp, 1);
|
|
}
|
|
|
|
static char *line;
|
|
static size_t linesize;
|
|
static FILE *exp_file;
|
|
|
|
/*
|
|
* Get the export list from one, currently open file
|
|
*/
|
|
static void
|
|
get_exportlist_one(int passno)
|
|
{
|
|
struct exportlist *ep;
|
|
struct grouplist *grp, *tgrp, *savgrp;
|
|
struct dirlist *dirhead;
|
|
struct statfs fsb;
|
|
struct xucred anon;
|
|
char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
|
|
int len, has_host, exflags, got_nondir, dirplen, netgrp;
|
|
|
|
v4root_phase = 0;
|
|
dirhead = (struct dirlist *)NULL;
|
|
while (get_line()) {
|
|
if (debug)
|
|
warnx("got line %s", line);
|
|
cp = line;
|
|
nextfield(&cp, &endcp);
|
|
if (*cp == '#')
|
|
goto nextline;
|
|
|
|
/*
|
|
* Set defaults.
|
|
*/
|
|
has_host = FALSE;
|
|
anon = def_anon;
|
|
exflags = MNT_EXPORTED;
|
|
got_nondir = 0;
|
|
opt_flags = 0;
|
|
ep = (struct exportlist *)NULL;
|
|
dirp = NULL;
|
|
|
|
/*
|
|
* Handle the V4 root dir.
|
|
*/
|
|
if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') {
|
|
/*
|
|
* V4: just indicates that it is the v4 root point,
|
|
* so skip over that and set v4root_phase.
|
|
*/
|
|
if (v4root_phase > 0) {
|
|
syslog(LOG_ERR, "V4:duplicate line, ignored");
|
|
goto nextline;
|
|
}
|
|
v4root_phase = 1;
|
|
cp += 3;
|
|
nextfield(&cp, &endcp);
|
|
}
|
|
|
|
/*
|
|
* Create new exports list entry
|
|
*/
|
|
len = endcp-cp;
|
|
tgrp = grp = get_grp();
|
|
while (len > 0) {
|
|
if (len > MNTNAMLEN) {
|
|
getexp_err(ep, tgrp, "mountpoint too long");
|
|
goto nextline;
|
|
}
|
|
if (*cp == '-') {
|
|
if (ep == (struct exportlist *)NULL) {
|
|
getexp_err(ep, tgrp,
|
|
"flag before export path definition");
|
|
goto nextline;
|
|
}
|
|
if (debug)
|
|
warnx("doing opt %s", cp);
|
|
got_nondir = 1;
|
|
if (do_opt(&cp, &endcp, ep, grp, &has_host,
|
|
&exflags, &anon)) {
|
|
getexp_err(ep, tgrp, NULL);
|
|
goto nextline;
|
|
}
|
|
} else if (*cp == '/') {
|
|
savedc = *endcp;
|
|
*endcp = '\0';
|
|
if (v4root_phase > 1) {
|
|
if (dirp != NULL) {
|
|
getexp_err(ep, tgrp, "Multiple V4 dirs");
|
|
goto nextline;
|
|
}
|
|
}
|
|
if (check_dirpath(cp) &&
|
|
statfs(cp, &fsb) >= 0) {
|
|
if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0)
|
|
syslog(LOG_ERR, "Warning: exporting of "
|
|
"automounted fs %s not supported", cp);
|
|
if (got_nondir) {
|
|
getexp_err(ep, tgrp, "dirs must be first");
|
|
goto nextline;
|
|
}
|
|
if (v4root_phase == 1) {
|
|
if (dirp != NULL) {
|
|
getexp_err(ep, tgrp, "Multiple V4 dirs");
|
|
goto nextline;
|
|
}
|
|
if (strlen(v4root_dirpath) == 0) {
|
|
strlcpy(v4root_dirpath, cp,
|
|
sizeof (v4root_dirpath));
|
|
} else if (strcmp(v4root_dirpath, cp)
|
|
!= 0) {
|
|
syslog(LOG_ERR,
|
|
"different V4 dirpath %s", cp);
|
|
getexp_err(ep, tgrp, NULL);
|
|
goto nextline;
|
|
}
|
|
dirp = cp;
|
|
v4root_phase = 2;
|
|
got_nondir = 1;
|
|
ep = get_exp();
|
|
} else {
|
|
if (ep) {
|
|
if (ep->ex_fs.val[0] !=
|
|
fsb.f_fsid.val[0] ||
|
|
ep->ex_fs.val[1] !=
|
|
fsb.f_fsid.val[1]) {
|
|
getexp_err(ep, tgrp,
|
|
"fsid mismatch");
|
|
goto nextline;
|
|
}
|
|
} else {
|
|
/*
|
|
* See if this directory is already
|
|
* in the list.
|
|
*/
|
|
ep = ex_search(&fsb.f_fsid, exphead);
|
|
if (ep == (struct exportlist *)NULL) {
|
|
ep = get_exp();
|
|
ep->ex_fs = fsb.f_fsid;
|
|
ep->ex_fsdir = strdup(fsb.f_mntonname);
|
|
if (ep->ex_fsdir == NULL)
|
|
out_of_mem();
|
|
if (debug)
|
|
warnx(
|
|
"making new ep fs=0x%x,0x%x",
|
|
fsb.f_fsid.val[0],
|
|
fsb.f_fsid.val[1]);
|
|
} else if (debug)
|
|
warnx("found ep fs=0x%x,0x%x",
|
|
fsb.f_fsid.val[0],
|
|
fsb.f_fsid.val[1]);
|
|
}
|
|
|
|
/*
|
|
* Add dirpath to export mount point.
|
|
*/
|
|
dirp = add_expdir(&dirhead, cp, len);
|
|
dirplen = len;
|
|
}
|
|
} else {
|
|
getexp_err(ep, tgrp,
|
|
"symbolic link in export path or statfs failed");
|
|
goto nextline;
|
|
}
|
|
*endcp = savedc;
|
|
} else {
|
|
savedc = *endcp;
|
|
*endcp = '\0';
|
|
got_nondir = 1;
|
|
if (ep == (struct exportlist *)NULL) {
|
|
getexp_err(ep, tgrp,
|
|
"host(s) before export path definition");
|
|
goto nextline;
|
|
}
|
|
|
|
/*
|
|
* Get the host or netgroup.
|
|
*/
|
|
setnetgrent(cp);
|
|
netgrp = getnetgrent(&hst, &usr, &dom);
|
|
do {
|
|
if (has_host) {
|
|
grp->gr_next = get_grp();
|
|
grp = grp->gr_next;
|
|
}
|
|
if (netgrp) {
|
|
if (hst == 0) {
|
|
syslog(LOG_ERR,
|
|
"null hostname in netgroup %s, skipping", cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
} else if (get_host(hst, grp, tgrp)) {
|
|
syslog(LOG_ERR,
|
|
"bad host %s in netgroup %s, skipping", hst, cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
}
|
|
} else if (get_host(cp, grp, tgrp)) {
|
|
syslog(LOG_ERR, "bad host %s, skipping", cp);
|
|
grp->gr_type = GT_IGNORE;
|
|
}
|
|
has_host = TRUE;
|
|
} while (netgrp && getnetgrent(&hst, &usr, &dom));
|
|
endnetgrent();
|
|
*endcp = savedc;
|
|
}
|
|
cp = endcp;
|
|
nextfield(&cp, &endcp);
|
|
len = endcp - cp;
|
|
}
|
|
if (check_options(dirhead)) {
|
|
getexp_err(ep, tgrp, NULL);
|
|
goto nextline;
|
|
}
|
|
if (!has_host) {
|
|
grp->gr_type = GT_DEFAULT;
|
|
if (debug)
|
|
warnx("adding a default entry");
|
|
|
|
/*
|
|
* Don't allow a network export coincide with a list of
|
|
* host(s) on the same line.
|
|
*/
|
|
} else if ((opt_flags & OP_NET) && tgrp->gr_next) {
|
|
getexp_err(ep, tgrp, "network/host conflict");
|
|
goto nextline;
|
|
|
|
/*
|
|
* If an export list was specified on this line, make sure
|
|
* that we have at least one valid entry, otherwise skip it.
|
|
*/
|
|
} else {
|
|
grp = tgrp;
|
|
while (grp && grp->gr_type == GT_IGNORE)
|
|
grp = grp->gr_next;
|
|
if (! grp) {
|
|
getexp_err(ep, tgrp, "no valid entries");
|
|
goto nextline;
|
|
}
|
|
}
|
|
|
|
if (v4root_phase == 1) {
|
|
getexp_err(ep, tgrp, "V4:root, no dirp, ignored");
|
|
goto nextline;
|
|
}
|
|
|
|
/*
|
|
* Loop through hosts, pushing the exports into the kernel.
|
|
* After loop, tgrp points to the start of the list and
|
|
* grp points to the last entry in the list.
|
|
* Do not do the do_mount() for passno == 1, since the
|
|
* second pass will do it, as required.
|
|
*/
|
|
grp = tgrp;
|
|
do {
|
|
grp->gr_exflags = exflags;
|
|
grp->gr_anon = anon;
|
|
if (v4root_phase == 2 && passno == 0)
|
|
LOGDEBUG("do_mount v4root");
|
|
if (passno == 0 && do_mount(ep, grp, exflags, &anon,
|
|
dirp, dirplen, &fsb, ep->ex_numsecflavors,
|
|
ep->ex_secflavors)) {
|
|
getexp_err(ep, tgrp, NULL);
|
|
goto nextline;
|
|
}
|
|
} while (grp->gr_next && (grp = grp->gr_next));
|
|
|
|
/*
|
|
* For V4: don't enter in mount lists.
|
|
*/
|
|
if (v4root_phase > 0 && v4root_phase <= 2) {
|
|
/*
|
|
* These structures are used for the "-I" reload,
|
|
* so save them for that case. Otherwise, just
|
|
* free them up now.
|
|
*/
|
|
if (passno == 1 && ep != NULL) {
|
|
savgrp = tgrp;
|
|
while (tgrp != NULL) {
|
|
/*
|
|
* Save the security flavors and exflags
|
|
* for this host set in the groups.
|
|
*/
|
|
tgrp->gr_numsecflavors =
|
|
ep->ex_numsecflavors;
|
|
if (ep->ex_numsecflavors > 0)
|
|
memcpy(tgrp->gr_secflavors,
|
|
ep->ex_secflavors,
|
|
sizeof(ep->ex_secflavors));
|
|
tgrp = tgrp->gr_next;
|
|
}
|
|
if (v4root_ep == NULL) {
|
|
v4root_ep = ep;
|
|
ep = NULL; /* Don't free below. */
|
|
}
|
|
grp->gr_next = v4root_ep->ex_grphead;
|
|
v4root_ep->ex_grphead = savgrp;
|
|
}
|
|
if (ep != NULL)
|
|
free_exp(ep);
|
|
while (tgrp != NULL) {
|
|
grp = tgrp;
|
|
tgrp = tgrp->gr_next;
|
|
free_grp(grp);
|
|
}
|
|
goto nextline;
|
|
}
|
|
|
|
/*
|
|
* Success. Update the data structures.
|
|
*/
|
|
if (has_host) {
|
|
hang_dirp(dirhead, tgrp, ep, opt_flags, &anon, exflags);
|
|
grp->gr_next = ep->ex_grphead;
|
|
ep->ex_grphead = tgrp;
|
|
} else {
|
|
hang_dirp(dirhead, (struct grouplist *)NULL, ep,
|
|
opt_flags, &anon, exflags);
|
|
free_grp(grp);
|
|
}
|
|
dirhead = (struct dirlist *)NULL;
|
|
if ((ep->ex_flag & EX_LINKED) == 0) {
|
|
insert_exports(ep, exphead);
|
|
|
|
ep->ex_flag |= EX_LINKED;
|
|
}
|
|
nextline:
|
|
v4root_phase = 0;
|
|
if (dirhead) {
|
|
free_dir(dirhead);
|
|
dirhead = (struct dirlist *)NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the export list from all specified files
|
|
*/
|
|
static void
|
|
get_exportlist(int passno)
|
|
{
|
|
struct export_args export;
|
|
struct iovec *iov;
|
|
struct statfs *mntbufp;
|
|
char errmsg[255];
|
|
int num, i;
|
|
int iovlen;
|
|
struct nfsex_args eargs;
|
|
FILE *debug_file;
|
|
|
|
if ((debug_file = fopen(_PATH_MOUNTDDEBUG, "r")) != NULL) {
|
|
fclose(debug_file);
|
|
logdebug = 1;
|
|
} else
|
|
logdebug = 0;
|
|
LOGDEBUG("passno=%d", passno);
|
|
v4root_dirpath[0] = '\0';
|
|
free_v4rootexp();
|
|
if (passno == 1) {
|
|
/*
|
|
* Save the current lists as old ones, so that the new lists
|
|
* can be compared with the old ones in the 2nd pass.
|
|
*/
|
|
for (i = 0; i < exphashsize; i++) {
|
|
SLIST_FIRST(&oldexphead[i]) = SLIST_FIRST(&exphead[i]);
|
|
SLIST_INIT(&exphead[i]);
|
|
}
|
|
|
|
/* Note that the public fh has not yet been set. */
|
|
has_set_publicfh = 0;
|
|
|
|
/* Read the export file(s) and process them */
|
|
read_exportfile(passno);
|
|
} else {
|
|
/*
|
|
* Just make the old lists empty.
|
|
* exphashsize == 0 for the first call, before oldexphead
|
|
* has been initialized-->loop won't be executed.
|
|
*/
|
|
for (i = 0; i < exphashsize; i++)
|
|
SLIST_INIT(&oldexphead[i]);
|
|
}
|
|
|
|
bzero(&export, sizeof(export));
|
|
export.ex_flags = MNT_DELEXPORT;
|
|
iov = NULL;
|
|
iovlen = 0;
|
|
bzero(errmsg, sizeof(errmsg));
|
|
|
|
if (suspend_nfsd != 0)
|
|
(void)nfssvc(NFSSVC_SUSPENDNFSD, NULL);
|
|
/*
|
|
* Delete the old V4 root dir.
|
|
*/
|
|
bzero(&eargs, sizeof (eargs));
|
|
eargs.export.ex_flags = MNT_DELEXPORT;
|
|
if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 &&
|
|
errno != ENOENT)
|
|
syslog(LOG_ERR, "Can't delete exports for V4:");
|
|
|
|
build_iovec(&iov, &iovlen, "fstype", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "fspath", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "from", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "update", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "export", &export,
|
|
sizeof(export));
|
|
build_iovec(&iov, &iovlen, "errmsg", errmsg,
|
|
sizeof(errmsg));
|
|
|
|
/*
|
|
* For passno == 1, compare the old and new lists updating the kernel
|
|
* exports for any cases that have changed.
|
|
* This call is doing the second pass through the lists.
|
|
* If it fails, fall back on the bulk reload.
|
|
*/
|
|
if (passno == 1 && compare_nmount_exportlist(iov, iovlen, errmsg) ==
|
|
0) {
|
|
LOGDEBUG("compareok");
|
|
/* Free up the old lists. */
|
|
free_exports(oldexphead);
|
|
} else {
|
|
LOGDEBUG("doing passno=0");
|
|
/*
|
|
* Clear flag that notes if a public fh has been exported.
|
|
* It is set by do_mount() if MNT_EXPUBLIC is set for the entry.
|
|
*/
|
|
has_publicfh = 0;
|
|
|
|
/* exphead == NULL if not yet allocated (first call). */
|
|
if (exphead != NULL) {
|
|
/*
|
|
* First, get rid of the old lists.
|
|
*/
|
|
free_exports(exphead);
|
|
free_exports(oldexphead);
|
|
}
|
|
|
|
/*
|
|
* And delete exports that are in the kernel for all local
|
|
* filesystems.
|
|
* XXX: Should know how to handle all local exportable
|
|
* filesystems.
|
|
*/
|
|
num = getmntinfo(&mntbufp, MNT_NOWAIT);
|
|
|
|
/* Allocate hash tables, for first call. */
|
|
if (exphead == NULL) {
|
|
/* Target an average linked list length of 10. */
|
|
exphashsize = num / 10;
|
|
if (exphashsize < 1)
|
|
exphashsize = 1;
|
|
else if (exphashsize > 100000)
|
|
exphashsize = 100000;
|
|
exphead = malloc(exphashsize * sizeof(*exphead));
|
|
oldexphead = malloc(exphashsize * sizeof(*oldexphead));
|
|
if (exphead == NULL || oldexphead == NULL)
|
|
errx(1, "Can't malloc hash tables");
|
|
|
|
for (i = 0; i < exphashsize; i++) {
|
|
SLIST_INIT(&exphead[i]);
|
|
SLIST_INIT(&oldexphead[i]);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < num; i++)
|
|
delete_export(iov, iovlen, &mntbufp[i], errmsg);
|
|
|
|
|
|
/* Read the export file(s) and process them */
|
|
read_exportfile(0);
|
|
}
|
|
|
|
if (iov != NULL) {
|
|
/* Free strings allocated by strdup() in getmntopts.c */
|
|
free(iov[0].iov_base); /* fstype */
|
|
free(iov[2].iov_base); /* fspath */
|
|
free(iov[4].iov_base); /* from */
|
|
free(iov[6].iov_base); /* update */
|
|
free(iov[8].iov_base); /* export */
|
|
free(iov[10].iov_base); /* errmsg */
|
|
|
|
/* free iov, allocated by realloc() */
|
|
free(iov);
|
|
iovlen = 0;
|
|
}
|
|
|
|
/*
|
|
* If there was no public fh, clear any previous one set.
|
|
*/
|
|
if (has_publicfh == 0) {
|
|
LOGDEBUG("clear public fh");
|
|
(void) nfssvc(NFSSVC_NOPUBLICFH, NULL);
|
|
}
|
|
|
|
/* Resume the nfsd. If they weren't suspended, this is harmless. */
|
|
(void)nfssvc(NFSSVC_RESUMENFSD, NULL);
|
|
LOGDEBUG("eo get_exportlist");
|
|
}
|
|
|
|
/*
|
|
* Insert an export entry in the appropriate list.
|
|
*/
|
|
static void
|
|
insert_exports(struct exportlist *ep, struct exportlisthead *exhp)
|
|
{
|
|
uint32_t i;
|
|
|
|
i = EXPHASH(&ep->ex_fs);
|
|
LOGDEBUG("fs=%s hash=%i", ep->ex_fsdir, i);
|
|
SLIST_INSERT_HEAD(&exhp[i], ep, entries);
|
|
}
|
|
|
|
/*
|
|
* Free up the exports lists passed in as arguments.
|
|
*/
|
|
static void
|
|
free_exports(struct exportlisthead *exhp)
|
|
{
|
|
struct exportlist *ep, *ep2;
|
|
int i;
|
|
|
|
for (i = 0; i < exphashsize; i++) {
|
|
SLIST_FOREACH_SAFE(ep, &exhp[i], entries, ep2) {
|
|
SLIST_REMOVE(&exhp[i], ep, exportlist, entries);
|
|
free_exp(ep);
|
|
}
|
|
SLIST_INIT(&exhp[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the exports file(s) and call get_exportlist_one() for each line.
|
|
*/
|
|
static void
|
|
read_exportfile(int passno)
|
|
{
|
|
int done, i;
|
|
|
|
/*
|
|
* Read in the exports file and build the list, calling
|
|
* nmount() as we go along to push the export rules into the kernel.
|
|
*/
|
|
done = 0;
|
|
for (i = 0; exnames[i] != NULL; i++) {
|
|
if (debug)
|
|
warnx("reading exports from %s", exnames[i]);
|
|
if ((exp_file = fopen(exnames[i], "r")) == NULL) {
|
|
syslog(LOG_WARNING, "can't open %s", exnames[i]);
|
|
continue;
|
|
}
|
|
get_exportlist_one(passno);
|
|
fclose(exp_file);
|
|
done++;
|
|
}
|
|
if (done == 0) {
|
|
syslog(LOG_ERR, "can't open any exports file");
|
|
exit(2);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compare the export lists against the old ones and do nmount() operations
|
|
* for any cases that have changed. This avoids doing nmount() for entries
|
|
* that have not changed.
|
|
* Return 0 upon success, 1 otherwise.
|
|
*/
|
|
static int
|
|
compare_nmount_exportlist(struct iovec *iov, int iovlen, char *errmsg)
|
|
{
|
|
struct exportlist *ep, *oep;
|
|
struct grouplist *grp;
|
|
struct statfs fs, ofs;
|
|
int i, ret;
|
|
|
|
/*
|
|
* Loop through the current list and look for an entry in the old
|
|
* list.
|
|
* If found, check to see if it the same.
|
|
* If it is not the same, delete and re-export.
|
|
* Then mark it done on the old list.
|
|
* else (not found)
|
|
* export it.
|
|
* Any entries left in the old list after processing must have their
|
|
* exports deleted.
|
|
*/
|
|
for (i = 0; i < exphashsize; i++)
|
|
SLIST_FOREACH(ep, &exphead[i], entries) {
|
|
LOGDEBUG("foreach ep=%s", ep->ex_fsdir);
|
|
oep = ex_search(&ep->ex_fs, oldexphead);
|
|
if (oep != NULL) {
|
|
/*
|
|
* Check the mount paths are the same.
|
|
* If not, return 1 so that the reload of the
|
|
* exports will be done in bulk, the
|
|
* passno == 0 way.
|
|
*/
|
|
LOGDEBUG("found old exp");
|
|
if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0)
|
|
return (1);
|
|
LOGDEBUG("same fsdir");
|
|
/*
|
|
* Test to see if the entry is the same.
|
|
* If not the same delete exports and
|
|
* re-export.
|
|
*/
|
|
if (compare_export(ep, oep) != 0) {
|
|
/*
|
|
* Clear has_publicfh if if was set
|
|
* in the old exports, but only if it
|
|
* has not been set during processing of
|
|
* the exports for this pass, as
|
|
* indicated by has_set_publicfh.
|
|
*/
|
|
if (has_set_publicfh == 0 &&
|
|
(oep->ex_flag & EX_PUBLICFH) != 0)
|
|
has_publicfh = 0;
|
|
|
|
/* Delete and re-export. */
|
|
if (statfs(ep->ex_fsdir, &fs) < 0)
|
|
return (1);
|
|
delete_export(iov, iovlen, &fs, errmsg);
|
|
ret = do_export_mount(ep, &fs);
|
|
if (ret != 0)
|
|
return (ret);
|
|
}
|
|
oep->ex_flag |= EX_DONE;
|
|
LOGDEBUG("exdone");
|
|
} else {
|
|
LOGDEBUG("not found so export");
|
|
/* Not found, so do export. */
|
|
if (statfs(ep->ex_fsdir, &fs) < 0)
|
|
return (1);
|
|
ret = do_export_mount(ep, &fs);
|
|
if (ret != 0)
|
|
return (ret);
|
|
}
|
|
}
|
|
|
|
/* Delete exports not done. */
|
|
for (i = 0; i < exphashsize; i++)
|
|
SLIST_FOREACH(oep, &oldexphead[i], entries) {
|
|
if ((oep->ex_flag & EX_DONE) == 0) {
|
|
LOGDEBUG("not done delete=%s", oep->ex_fsdir);
|
|
if (statfs(oep->ex_fsdir, &ofs) >= 0 &&
|
|
oep->ex_fs.val[0] == ofs.f_fsid.val[0] &&
|
|
oep->ex_fs.val[1] == ofs.f_fsid.val[1]) {
|
|
LOGDEBUG("do delete");
|
|
/*
|
|
* Clear has_publicfh if if was set
|
|
* in the old exports, but only if it
|
|
* has not been set during processing of
|
|
* the exports for this pass, as
|
|
* indicated by has_set_publicfh.
|
|
*/
|
|
if (has_set_publicfh == 0 &&
|
|
(oep->ex_flag & EX_PUBLICFH) != 0)
|
|
has_publicfh = 0;
|
|
|
|
delete_export(iov, iovlen, &ofs,
|
|
errmsg);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Do the V4 root exports, as required. */
|
|
grp = NULL;
|
|
if (v4root_ep != NULL)
|
|
grp = v4root_ep->ex_grphead;
|
|
v4root_phase = 2;
|
|
while (v4root_ep != NULL && grp != NULL) {
|
|
LOGDEBUG("v4root expath=%s", v4root_dirpath);
|
|
ret = do_mount(v4root_ep, grp, grp->gr_exflags, &grp->gr_anon,
|
|
v4root_dirpath, strlen(v4root_dirpath), &fs,
|
|
grp->gr_numsecflavors, grp->gr_secflavors);
|
|
if (ret != 0) {
|
|
v4root_phase = 0;
|
|
return (ret);
|
|
}
|
|
grp = grp->gr_next;
|
|
}
|
|
v4root_phase = 0;
|
|
free_v4rootexp();
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Compare old and current exportlist entries for the fsid and return 0
|
|
* if they are the same, 1 otherwise.
|
|
*/
|
|
static int
|
|
compare_export(struct exportlist *ep, struct exportlist *oep)
|
|
{
|
|
struct grouplist *grp, *ogrp;
|
|
|
|
if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0)
|
|
return (1);
|
|
if ((ep->ex_flag & EX_DEFSET) != (oep->ex_flag & EX_DEFSET))
|
|
return (1);
|
|
if ((ep->ex_defdir != NULL && oep->ex_defdir == NULL) ||
|
|
(ep->ex_defdir == NULL && oep->ex_defdir != NULL))
|
|
return (1);
|
|
if (ep->ex_defdir != NULL && (ep->ex_defdir->dp_flag & DP_DEFSET) !=
|
|
(oep->ex_defdir->dp_flag & DP_DEFSET))
|
|
return (1);
|
|
if ((ep->ex_flag & EX_DEFSET) != 0 && (ep->ex_defnumsecflavors !=
|
|
oep->ex_defnumsecflavors || ep->ex_defexflags !=
|
|
oep->ex_defexflags || compare_cred(&ep->ex_defanon,
|
|
&oep->ex_defanon) != 0 || compare_secflavor(ep->ex_defsecflavors,
|
|
oep->ex_defsecflavors, ep->ex_defnumsecflavors) != 0))
|
|
return (1);
|
|
|
|
/* Now, check all the groups. */
|
|
for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next)
|
|
ogrp->gr_flag = 0;
|
|
for (grp = ep->ex_grphead; grp != NULL; grp = grp->gr_next) {
|
|
for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp =
|
|
ogrp->gr_next)
|
|
if ((ogrp->gr_flag & GR_FND) == 0 &&
|
|
grp->gr_numsecflavors == ogrp->gr_numsecflavors &&
|
|
grp->gr_exflags == ogrp->gr_exflags &&
|
|
compare_cred(&grp->gr_anon, &ogrp->gr_anon) == 0 &&
|
|
compare_secflavor(grp->gr_secflavors,
|
|
ogrp->gr_secflavors, grp->gr_numsecflavors) == 0)
|
|
break;
|
|
if (ogrp != NULL)
|
|
ogrp->gr_flag |= GR_FND;
|
|
else
|
|
return (1);
|
|
}
|
|
for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next)
|
|
if ((ogrp->gr_flag & GR_FND) == 0)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This algorithm compares two arrays of "n" items. It returns 0 if they are
|
|
* the "same" and 1 otherwise. Although suboptimal, it is always safe to
|
|
* return 1, which makes compare_nmount_export() reload the exports entry.
|
|
* "same" refers to having the same set of values in the two arrays.
|
|
* The arrays are in no particular order and duplicates (multiple entries
|
|
* in an array with the same value) is allowed.
|
|
* The algorithm is inefficient, but the common case of indentical arrays is
|
|
* handled first and "n" is normally fairly small.
|
|
* Since the two functions need the same algorithm but for arrays of
|
|
* different types (gid_t vs int), this is done as a macro.
|
|
*/
|
|
#define COMPARE_ARRAYS(a1, a2, n) \
|
|
do { \
|
|
int fnd, fndarray[(n)], i, j; \
|
|
/* Handle common case of identical arrays. */ \
|
|
for (i = 0; i < (n); i++) \
|
|
if ((a1)[i] != (a2)[i]) \
|
|
break; \
|
|
if (i == (n)) \
|
|
return (0); \
|
|
for (i = 0; i < (n); i++) \
|
|
fndarray[i] = 0; \
|
|
for (i = 0; i < (n); i++) { \
|
|
fnd = 0; \
|
|
for (j = 0; j < (n); j++) { \
|
|
if ((a1)[i] == (a2)[j]) { \
|
|
fndarray[j] = 1; \
|
|
fnd = 1; \
|
|
} \
|
|
} \
|
|
if (fnd == 0) \
|
|
return (1); \
|
|
} \
|
|
for (i = 0; i < (n); i++) \
|
|
if (fndarray[i] == 0) \
|
|
return (1); \
|
|
return (0); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Compare to struct xucred's. Return 0 if the same and 1 otherwise.
|
|
*/
|
|
static int
|
|
compare_cred(struct xucred *cr0, struct xucred *cr1)
|
|
{
|
|
|
|
if (cr0->cr_uid != cr1->cr_uid || cr0->cr_ngroups != cr1->cr_ngroups)
|
|
return (1);
|
|
|
|
COMPARE_ARRAYS(cr0->cr_groups, cr1->cr_groups, cr0->cr_ngroups);
|
|
}
|
|
|
|
/*
|
|
* Compare two lists of security flavors. Return 0 if the same and 1 otherwise.
|
|
*/
|
|
static int
|
|
compare_secflavor(int *sec1, int *sec2, int nsec)
|
|
{
|
|
|
|
COMPARE_ARRAYS(sec1, sec2, nsec);
|
|
}
|
|
|
|
/*
|
|
* Delete an exports entry.
|
|
*/
|
|
static void
|
|
delete_export(struct iovec *iov, int iovlen, struct statfs *fsp, char *errmsg)
|
|
{
|
|
struct xvfsconf vfc;
|
|
|
|
if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) {
|
|
syslog(LOG_ERR, "getvfsbyname() failed for %s",
|
|
fsp->f_fstypename);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We do not need to delete "export" flag from
|
|
* filesystems that do not have it set.
|
|
*/
|
|
if (!(fsp->f_flags & MNT_EXPORTED))
|
|
return;
|
|
/*
|
|
* Do not delete export for network filesystem by
|
|
* passing "export" arg to nmount().
|
|
* It only makes sense to do this for local filesystems.
|
|
*/
|
|
if (vfc.vfc_flags & VFCF_NETWORK)
|
|
return;
|
|
|
|
iov[1].iov_base = fsp->f_fstypename;
|
|
iov[1].iov_len = strlen(fsp->f_fstypename) + 1;
|
|
iov[3].iov_base = fsp->f_mntonname;
|
|
iov[3].iov_len = strlen(fsp->f_mntonname) + 1;
|
|
iov[5].iov_base = fsp->f_mntfromname;
|
|
iov[5].iov_len = strlen(fsp->f_mntfromname) + 1;
|
|
errmsg[0] = '\0';
|
|
|
|
/*
|
|
* EXDEV is returned when path exists but is not a
|
|
* mount point. May happens if raced with unmount.
|
|
*/
|
|
if (nmount(iov, iovlen, fsp->f_flags) < 0 && errno != ENOENT &&
|
|
errno != ENOTSUP && errno != EXDEV) {
|
|
syslog(LOG_ERR,
|
|
"can't delete exports for %s: %m %s",
|
|
fsp->f_mntonname, errmsg);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocate an export list element
|
|
*/
|
|
static struct exportlist *
|
|
get_exp(void)
|
|
{
|
|
struct exportlist *ep;
|
|
|
|
ep = (struct exportlist *)calloc(1, sizeof (struct exportlist));
|
|
if (ep == (struct exportlist *)NULL)
|
|
out_of_mem();
|
|
return (ep);
|
|
}
|
|
|
|
/*
|
|
* Allocate a group list element
|
|
*/
|
|
static struct grouplist *
|
|
get_grp(void)
|
|
{
|
|
struct grouplist *gp;
|
|
|
|
gp = (struct grouplist *)calloc(1, sizeof (struct grouplist));
|
|
if (gp == (struct grouplist *)NULL)
|
|
out_of_mem();
|
|
return (gp);
|
|
}
|
|
|
|
/*
|
|
* Clean up upon an error in get_exportlist().
|
|
*/
|
|
static void
|
|
getexp_err(struct exportlist *ep, struct grouplist *grp, const char *reason)
|
|
{
|
|
struct grouplist *tgrp;
|
|
|
|
if (!(opt_flags & OP_QUIET)) {
|
|
if (reason != NULL)
|
|
syslog(LOG_ERR, "bad exports list line '%s': %s", line,
|
|
reason);
|
|
else
|
|
syslog(LOG_ERR, "bad exports list line '%s'", line);
|
|
}
|
|
if (ep && (ep->ex_flag & EX_LINKED) == 0)
|
|
free_exp(ep);
|
|
while (grp) {
|
|
tgrp = grp;
|
|
grp = grp->gr_next;
|
|
free_grp(tgrp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Search the export list for a matching fs.
|
|
*/
|
|
static struct exportlist *
|
|
ex_search(fsid_t *fsid, struct exportlisthead *exhp)
|
|
{
|
|
struct exportlist *ep;
|
|
uint32_t i;
|
|
|
|
i = EXPHASH(fsid);
|
|
SLIST_FOREACH(ep, &exhp[i], entries) {
|
|
if (ep->ex_fs.val[0] == fsid->val[0] &&
|
|
ep->ex_fs.val[1] == fsid->val[1])
|
|
return (ep);
|
|
}
|
|
|
|
return (ep);
|
|
}
|
|
|
|
/*
|
|
* Add a directory path to the list.
|
|
*/
|
|
static char *
|
|
add_expdir(struct dirlist **dpp, char *cp, int len)
|
|
{
|
|
struct dirlist *dp;
|
|
|
|
dp = malloc(sizeof (struct dirlist));
|
|
if (dp == (struct dirlist *)NULL)
|
|
out_of_mem();
|
|
dp->dp_left = *dpp;
|
|
dp->dp_right = (struct dirlist *)NULL;
|
|
dp->dp_flag = 0;
|
|
dp->dp_hosts = (struct hostlist *)NULL;
|
|
dp->dp_dirp = strndup(cp, len);
|
|
if (dp->dp_dirp == NULL)
|
|
out_of_mem();
|
|
*dpp = dp;
|
|
return (dp->dp_dirp);
|
|
}
|
|
|
|
/*
|
|
* Hang the dir list element off the dirpath binary tree as required
|
|
* and update the entry for host.
|
|
*/
|
|
static void
|
|
hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
|
|
int flags, struct xucred *anoncrp, int exflags)
|
|
{
|
|
struct hostlist *hp;
|
|
struct dirlist *dp2;
|
|
|
|
if (flags & OP_ALLDIRS) {
|
|
if (ep->ex_defdir)
|
|
free((caddr_t)dp);
|
|
else
|
|
ep->ex_defdir = dp;
|
|
if (grp == (struct grouplist *)NULL) {
|
|
ep->ex_flag |= EX_DEFSET;
|
|
ep->ex_defdir->dp_flag |= DP_DEFSET;
|
|
/* Save the default security flavors list. */
|
|
ep->ex_defnumsecflavors = ep->ex_numsecflavors;
|
|
if (ep->ex_numsecflavors > 0)
|
|
memcpy(ep->ex_defsecflavors, ep->ex_secflavors,
|
|
sizeof(ep->ex_secflavors));
|
|
ep->ex_defanon = *anoncrp;
|
|
ep->ex_defexflags = exflags;
|
|
} else while (grp) {
|
|
hp = get_ht();
|
|
hp->ht_grp = grp;
|
|
hp->ht_next = ep->ex_defdir->dp_hosts;
|
|
ep->ex_defdir->dp_hosts = hp;
|
|
/* Save the security flavors list for this host set. */
|
|
grp->gr_numsecflavors = ep->ex_numsecflavors;
|
|
if (ep->ex_numsecflavors > 0)
|
|
memcpy(grp->gr_secflavors, ep->ex_secflavors,
|
|
sizeof(ep->ex_secflavors));
|
|
grp = grp->gr_next;
|
|
}
|
|
} else {
|
|
|
|
/*
|
|
* Loop through the directories adding them to the tree.
|
|
*/
|
|
while (dp) {
|
|
dp2 = dp->dp_left;
|
|
add_dlist(&ep->ex_dirl, dp, grp, flags, ep, anoncrp,
|
|
exflags);
|
|
dp = dp2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the binary tree either updating a node that is already there
|
|
* for the new directory or adding the new node.
|
|
*/
|
|
static void
|
|
add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
|
|
int flags, struct exportlist *ep, struct xucred *anoncrp, int exflags)
|
|
{
|
|
struct dirlist *dp;
|
|
struct hostlist *hp;
|
|
int cmp;
|
|
|
|
dp = *dpp;
|
|
if (dp) {
|
|
cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
|
|
if (cmp > 0) {
|
|
add_dlist(&dp->dp_left, newdp, grp, flags, ep, anoncrp,
|
|
exflags);
|
|
return;
|
|
} else if (cmp < 0) {
|
|
add_dlist(&dp->dp_right, newdp, grp, flags, ep, anoncrp,
|
|
exflags);
|
|
return;
|
|
} else
|
|
free((caddr_t)newdp);
|
|
} else {
|
|
dp = newdp;
|
|
dp->dp_left = (struct dirlist *)NULL;
|
|
*dpp = dp;
|
|
}
|
|
if (grp) {
|
|
|
|
/*
|
|
* Hang all of the host(s) off of the directory point.
|
|
*/
|
|
do {
|
|
hp = get_ht();
|
|
hp->ht_grp = grp;
|
|
hp->ht_next = dp->dp_hosts;
|
|
dp->dp_hosts = hp;
|
|
/* Save the security flavors list for this host set. */
|
|
grp->gr_numsecflavors = ep->ex_numsecflavors;
|
|
if (ep->ex_numsecflavors > 0)
|
|
memcpy(grp->gr_secflavors, ep->ex_secflavors,
|
|
sizeof(ep->ex_secflavors));
|
|
grp = grp->gr_next;
|
|
} while (grp);
|
|
} else {
|
|
ep->ex_flag |= EX_DEFSET;
|
|
dp->dp_flag |= DP_DEFSET;
|
|
/* Save the default security flavors list. */
|
|
ep->ex_defnumsecflavors = ep->ex_numsecflavors;
|
|
if (ep->ex_numsecflavors > 0)
|
|
memcpy(ep->ex_defsecflavors, ep->ex_secflavors,
|
|
sizeof(ep->ex_secflavors));
|
|
ep->ex_defanon = *anoncrp;
|
|
ep->ex_defexflags = exflags;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Search for a dirpath on the export point.
|
|
*/
|
|
static struct dirlist *
|
|
dirp_search(struct dirlist *dp, char *dirp)
|
|
{
|
|
int cmp;
|
|
|
|
if (dp) {
|
|
cmp = strcmp(dp->dp_dirp, dirp);
|
|
if (cmp > 0)
|
|
return (dirp_search(dp->dp_left, dirp));
|
|
else if (cmp < 0)
|
|
return (dirp_search(dp->dp_right, dirp));
|
|
else
|
|
return (dp);
|
|
}
|
|
return (dp);
|
|
}
|
|
|
|
/*
|
|
* Scan for a host match in a directory tree.
|
|
*/
|
|
static int
|
|
chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
|
|
int *hostsetp, int *numsecflavors, int **secflavorsp)
|
|
{
|
|
struct hostlist *hp;
|
|
struct grouplist *grp;
|
|
struct addrinfo *ai;
|
|
|
|
if (dp) {
|
|
if (dp->dp_flag & DP_DEFSET)
|
|
*defsetp = dp->dp_flag;
|
|
hp = dp->dp_hosts;
|
|
while (hp) {
|
|
grp = hp->ht_grp;
|
|
switch (grp->gr_type) {
|
|
case GT_HOST:
|
|
ai = grp->gr_ptr.gt_addrinfo;
|
|
for (; ai; ai = ai->ai_next) {
|
|
if (!sacmp(ai->ai_addr, saddr, NULL)) {
|
|
*hostsetp =
|
|
(hp->ht_flag | DP_HOSTSET);
|
|
if (numsecflavors != NULL) {
|
|
*numsecflavors =
|
|
grp->gr_numsecflavors;
|
|
*secflavorsp =
|
|
grp->gr_secflavors;
|
|
}
|
|
return (1);
|
|
}
|
|
}
|
|
break;
|
|
case GT_NET:
|
|
if (!sacmp(saddr, (struct sockaddr *)
|
|
&grp->gr_ptr.gt_net.nt_net,
|
|
(struct sockaddr *)
|
|
&grp->gr_ptr.gt_net.nt_mask)) {
|
|
*hostsetp = (hp->ht_flag | DP_HOSTSET);
|
|
if (numsecflavors != NULL) {
|
|
*numsecflavors =
|
|
grp->gr_numsecflavors;
|
|
*secflavorsp =
|
|
grp->gr_secflavors;
|
|
}
|
|
return (1);
|
|
}
|
|
break;
|
|
}
|
|
hp = hp->ht_next;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Scan tree for a host that matches the address.
|
|
*/
|
|
static int
|
|
scan_tree(struct dirlist *dp, struct sockaddr *saddr)
|
|
{
|
|
int defset, hostset;
|
|
|
|
if (dp) {
|
|
if (scan_tree(dp->dp_left, saddr))
|
|
return (1);
|
|
if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL))
|
|
return (1);
|
|
if (scan_tree(dp->dp_right, saddr))
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Traverse the dirlist tree and free it up.
|
|
*/
|
|
static void
|
|
free_dir(struct dirlist *dp)
|
|
{
|
|
|
|
if (dp) {
|
|
free_dir(dp->dp_left);
|
|
free_dir(dp->dp_right);
|
|
free_host(dp->dp_hosts);
|
|
free(dp->dp_dirp);
|
|
free(dp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parse a colon separated list of security flavors
|
|
*/
|
|
static int
|
|
parsesec(char *seclist, struct exportlist *ep)
|
|
{
|
|
char *cp, savedc;
|
|
int flavor;
|
|
|
|
ep->ex_numsecflavors = 0;
|
|
for (;;) {
|
|
cp = strchr(seclist, ':');
|
|
if (cp) {
|
|
savedc = *cp;
|
|
*cp = '\0';
|
|
}
|
|
|
|
if (!strcmp(seclist, "sys"))
|
|
flavor = AUTH_SYS;
|
|
else if (!strcmp(seclist, "krb5"))
|
|
flavor = RPCSEC_GSS_KRB5;
|
|
else if (!strcmp(seclist, "krb5i"))
|
|
flavor = RPCSEC_GSS_KRB5I;
|
|
else if (!strcmp(seclist, "krb5p"))
|
|
flavor = RPCSEC_GSS_KRB5P;
|
|
else {
|
|
if (cp)
|
|
*cp = savedc;
|
|
syslog(LOG_ERR, "bad sec flavor: %s", seclist);
|
|
return (1);
|
|
}
|
|
if (ep->ex_numsecflavors == MAXSECFLAVORS) {
|
|
if (cp)
|
|
*cp = savedc;
|
|
syslog(LOG_ERR, "too many sec flavors: %s", seclist);
|
|
return (1);
|
|
}
|
|
ep->ex_secflavors[ep->ex_numsecflavors] = flavor;
|
|
ep->ex_numsecflavors++;
|
|
if (cp) {
|
|
*cp = savedc;
|
|
seclist = cp + 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Parse the option string and update fields.
|
|
* Option arguments may either be -<option>=<value> or
|
|
* -<option> <value>
|
|
*/
|
|
static int
|
|
do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
|
|
int *has_hostp, int *exflagsp, struct xucred *cr)
|
|
{
|
|
char *cpoptarg, *cpoptend;
|
|
char *cp, *endcp, *cpopt, savedc, savedc2;
|
|
int allflag, usedarg;
|
|
|
|
savedc2 = '\0';
|
|
cpopt = *cpp;
|
|
cpopt++;
|
|
cp = *endcpp;
|
|
savedc = *cp;
|
|
*cp = '\0';
|
|
while (cpopt && *cpopt) {
|
|
allflag = 1;
|
|
usedarg = -2;
|
|
if ((cpoptend = strchr(cpopt, ','))) {
|
|
*cpoptend++ = '\0';
|
|
if ((cpoptarg = strchr(cpopt, '=')))
|
|
*cpoptarg++ = '\0';
|
|
} else {
|
|
if ((cpoptarg = strchr(cpopt, '=')))
|
|
*cpoptarg++ = '\0';
|
|
else {
|
|
*cp = savedc;
|
|
nextfield(&cp, &endcp);
|
|
**endcpp = '\0';
|
|
if (endcp > cp && *cp != '-') {
|
|
cpoptarg = cp;
|
|
savedc2 = *endcp;
|
|
*endcp = '\0';
|
|
usedarg = 0;
|
|
}
|
|
}
|
|
}
|
|
if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
|
|
*exflagsp |= MNT_EXRDONLY;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
|
|
!(allflag = strcmp(cpopt, "mapall")) ||
|
|
!strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
|
|
usedarg++;
|
|
parsecred(cpoptarg, cr);
|
|
if (allflag == 0) {
|
|
*exflagsp |= MNT_EXPORTANON;
|
|
opt_flags |= OP_MAPALL;
|
|
} else
|
|
opt_flags |= OP_MAPROOT;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "mask") ||
|
|
!strcmp(cpopt, "m"))) {
|
|
if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
|
|
syslog(LOG_ERR, "bad mask: %s", cpoptarg);
|
|
return (1);
|
|
}
|
|
usedarg++;
|
|
opt_flags |= OP_MASK;
|
|
} else if (cpoptarg && (!strcmp(cpopt, "network") ||
|
|
!strcmp(cpopt, "n"))) {
|
|
if (strchr(cpoptarg, '/') != NULL) {
|
|
if (debug)
|
|
fprintf(stderr, "setting OP_MASKLEN\n");
|
|
opt_flags |= OP_MASKLEN;
|
|
}
|
|
if (grp->gr_type != GT_NULL) {
|
|
syslog(LOG_ERR, "network/host conflict");
|
|
return (1);
|
|
} else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
|
|
syslog(LOG_ERR, "bad net: %s", cpoptarg);
|
|
return (1);
|
|
}
|
|
grp->gr_type = GT_NET;
|
|
*has_hostp = 1;
|
|
usedarg++;
|
|
opt_flags |= OP_NET;
|
|
} else if (!strcmp(cpopt, "alldirs")) {
|
|
opt_flags |= OP_ALLDIRS;
|
|
} else if (!strcmp(cpopt, "public")) {
|
|
*exflagsp |= MNT_EXPUBLIC;
|
|
} else if (!strcmp(cpopt, "webnfs")) {
|
|
*exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
|
|
opt_flags |= OP_MAPALL;
|
|
} else if (cpoptarg && !strcmp(cpopt, "index")) {
|
|
ep->ex_indexfile = strdup(cpoptarg);
|
|
} else if (!strcmp(cpopt, "quiet")) {
|
|
opt_flags |= OP_QUIET;
|
|
} else if (cpoptarg && !strcmp(cpopt, "sec")) {
|
|
if (parsesec(cpoptarg, ep))
|
|
return (1);
|
|
opt_flags |= OP_SEC;
|
|
usedarg++;
|
|
} else {
|
|
syslog(LOG_ERR, "bad opt %s", cpopt);
|
|
return (1);
|
|
}
|
|
if (usedarg >= 0) {
|
|
*endcp = savedc2;
|
|
**endcpp = savedc;
|
|
if (usedarg > 0) {
|
|
*cpp = cp;
|
|
*endcpp = endcp;
|
|
}
|
|
return (0);
|
|
}
|
|
cpopt = cpoptend;
|
|
}
|
|
**endcpp = savedc;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Translate a character string to the corresponding list of network
|
|
* addresses for a hostname.
|
|
*/
|
|
static int
|
|
get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
|
|
{
|
|
struct grouplist *checkgrp;
|
|
struct addrinfo *ai, *tai, hints;
|
|
int ecode;
|
|
char host[NI_MAXHOST];
|
|
|
|
if (grp->gr_type != GT_NULL) {
|
|
syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
|
|
return (1);
|
|
}
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_CANONNAME;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
ecode = getaddrinfo(cp, NULL, &hints, &ai);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR,"can't get address info for host %s", cp);
|
|
return 1;
|
|
}
|
|
grp->gr_ptr.gt_addrinfo = ai;
|
|
while (ai != NULL) {
|
|
if (ai->ai_canonname == NULL) {
|
|
if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
|
|
sizeof host, NULL, 0, NI_NUMERICHOST) != 0)
|
|
strlcpy(host, "?", sizeof(host));
|
|
ai->ai_canonname = strdup(host);
|
|
ai->ai_flags |= AI_CANONNAME;
|
|
}
|
|
if (debug)
|
|
fprintf(stderr, "got host %s\n", ai->ai_canonname);
|
|
/*
|
|
* Sanity check: make sure we don't already have an entry
|
|
* for this host in the grouplist.
|
|
*/
|
|
for (checkgrp = tgrp; checkgrp != NULL;
|
|
checkgrp = checkgrp->gr_next) {
|
|
if (checkgrp->gr_type != GT_HOST)
|
|
continue;
|
|
for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
|
|
tai = tai->ai_next) {
|
|
if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
|
|
continue;
|
|
if (debug)
|
|
fprintf(stderr,
|
|
"ignoring duplicate host %s\n",
|
|
ai->ai_canonname);
|
|
grp->gr_type = GT_IGNORE;
|
|
return (0);
|
|
}
|
|
}
|
|
ai = ai->ai_next;
|
|
}
|
|
grp->gr_type = GT_HOST;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Free up an exports list component
|
|
*/
|
|
static void
|
|
free_exp(struct exportlist *ep)
|
|
{
|
|
struct grouplist *grp, *tgrp;
|
|
|
|
if (ep->ex_defdir) {
|
|
free_host(ep->ex_defdir->dp_hosts);
|
|
free((caddr_t)ep->ex_defdir);
|
|
}
|
|
if (ep->ex_fsdir)
|
|
free(ep->ex_fsdir);
|
|
if (ep->ex_indexfile)
|
|
free(ep->ex_indexfile);
|
|
free_dir(ep->ex_dirl);
|
|
grp = ep->ex_grphead;
|
|
while (grp) {
|
|
tgrp = grp;
|
|
grp = grp->gr_next;
|
|
free_grp(tgrp);
|
|
}
|
|
free((caddr_t)ep);
|
|
}
|
|
|
|
/*
|
|
* Free up the v4root exports.
|
|
*/
|
|
static void
|
|
free_v4rootexp(void)
|
|
{
|
|
|
|
if (v4root_ep != NULL) {
|
|
free_exp(v4root_ep);
|
|
v4root_ep = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free hosts.
|
|
*/
|
|
static void
|
|
free_host(struct hostlist *hp)
|
|
{
|
|
struct hostlist *hp2;
|
|
|
|
while (hp) {
|
|
hp2 = hp;
|
|
hp = hp->ht_next;
|
|
free((caddr_t)hp2);
|
|
}
|
|
}
|
|
|
|
static struct hostlist *
|
|
get_ht(void)
|
|
{
|
|
struct hostlist *hp;
|
|
|
|
hp = (struct hostlist *)malloc(sizeof (struct hostlist));
|
|
if (hp == (struct hostlist *)NULL)
|
|
out_of_mem();
|
|
hp->ht_next = (struct hostlist *)NULL;
|
|
hp->ht_flag = 0;
|
|
return (hp);
|
|
}
|
|
|
|
/*
|
|
* Out of memory, fatal
|
|
*/
|
|
static void
|
|
out_of_mem(void)
|
|
{
|
|
|
|
syslog(LOG_ERR, "out of memory");
|
|
exit(2);
|
|
}
|
|
|
|
/*
|
|
* Call do_mount() from the struct exportlist, for each case needed.
|
|
*/
|
|
static int
|
|
do_export_mount(struct exportlist *ep, struct statfs *fsp)
|
|
{
|
|
struct grouplist *grp, defgrp;
|
|
int ret;
|
|
size_t dirlen;
|
|
|
|
LOGDEBUG("do_export_mount=%s", ep->ex_fsdir);
|
|
dirlen = strlen(ep->ex_fsdir);
|
|
if ((ep->ex_flag & EX_DEFSET) != 0) {
|
|
defgrp.gr_type = GT_DEFAULT;
|
|
defgrp.gr_next = NULL;
|
|
/* We have an entry for all other hosts/nets. */
|
|
LOGDEBUG("ex_defexflags=0x%x", ep->ex_defexflags);
|
|
ret = do_mount(ep, &defgrp, ep->ex_defexflags, &ep->ex_defanon,
|
|
ep->ex_fsdir, dirlen, fsp, ep->ex_defnumsecflavors,
|
|
ep->ex_defsecflavors);
|
|
if (ret != 0)
|
|
return (ret);
|
|
}
|
|
|
|
/* Do a mount for each group. */
|
|
grp = ep->ex_grphead;
|
|
while (grp != NULL) {
|
|
LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%x",
|
|
grp->gr_type, grp->gr_exflags);
|
|
ret = do_mount(ep, grp, grp->gr_exflags, &grp->gr_anon,
|
|
ep->ex_fsdir, dirlen, fsp, grp->gr_numsecflavors,
|
|
grp->gr_secflavors);
|
|
if (ret != 0)
|
|
return (ret);
|
|
grp = grp->gr_next;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Do the nmount() syscall with the update flag to push the export info into
|
|
* the kernel.
|
|
*/
|
|
static int
|
|
do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
|
|
struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb,
|
|
int numsecflavors, int *secflavors)
|
|
{
|
|
struct statfs fsb1;
|
|
struct addrinfo *ai;
|
|
struct export_args *eap;
|
|
char errmsg[255];
|
|
char *cp;
|
|
int done;
|
|
char savedc;
|
|
struct iovec *iov;
|
|
int i, iovlen;
|
|
int ret;
|
|
struct nfsex_args nfsea;
|
|
|
|
eap = &nfsea.export;
|
|
|
|
cp = NULL;
|
|
savedc = '\0';
|
|
iov = NULL;
|
|
iovlen = 0;
|
|
ret = 0;
|
|
|
|
bzero(eap, sizeof (struct export_args));
|
|
bzero(errmsg, sizeof(errmsg));
|
|
eap->ex_flags = exflags;
|
|
eap->ex_anon = *anoncrp;
|
|
LOGDEBUG("do_mount exflags=0x%x", exflags);
|
|
eap->ex_indexfile = ep->ex_indexfile;
|
|
if (grp->gr_type == GT_HOST)
|
|
ai = grp->gr_ptr.gt_addrinfo;
|
|
else
|
|
ai = NULL;
|
|
eap->ex_numsecflavors = numsecflavors;
|
|
LOGDEBUG("do_mount numsec=%d", numsecflavors);
|
|
for (i = 0; i < eap->ex_numsecflavors; i++)
|
|
eap->ex_secflavors[i] = secflavors[i];
|
|
if (eap->ex_numsecflavors == 0) {
|
|
eap->ex_numsecflavors = 1;
|
|
eap->ex_secflavors[0] = AUTH_SYS;
|
|
}
|
|
done = FALSE;
|
|
|
|
if (v4root_phase == 0) {
|
|
build_iovec(&iov, &iovlen, "fstype", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "fspath", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "from", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "update", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "export", eap,
|
|
sizeof (struct export_args));
|
|
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
|
|
}
|
|
|
|
while (!done) {
|
|
switch (grp->gr_type) {
|
|
case GT_HOST:
|
|
if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
|
|
goto skip;
|
|
eap->ex_addr = ai->ai_addr;
|
|
eap->ex_addrlen = ai->ai_addrlen;
|
|
eap->ex_masklen = 0;
|
|
break;
|
|
case GT_NET:
|
|
if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
|
|
have_v6 == 0)
|
|
goto skip;
|
|
eap->ex_addr =
|
|
(struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
|
|
eap->ex_addrlen =
|
|
((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len;
|
|
eap->ex_mask =
|
|
(struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
|
|
eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len;
|
|
break;
|
|
case GT_DEFAULT:
|
|
eap->ex_addr = NULL;
|
|
eap->ex_addrlen = 0;
|
|
eap->ex_mask = NULL;
|
|
eap->ex_masklen = 0;
|
|
break;
|
|
case GT_IGNORE:
|
|
ret = 0;
|
|
goto error_exit;
|
|
break;
|
|
default:
|
|
syslog(LOG_ERR, "bad grouptype");
|
|
if (cp)
|
|
*cp = savedc;
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
|
|
/*
|
|
* For V4:, use the nfssvc() syscall, instead of mount().
|
|
*/
|
|
if (v4root_phase == 2) {
|
|
nfsea.fspec = v4root_dirpath;
|
|
if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) {
|
|
syslog(LOG_ERR, "Exporting V4: failed");
|
|
return (2);
|
|
}
|
|
} else {
|
|
/*
|
|
* XXX:
|
|
* Maybe I should just use the fsb->f_mntonname path
|
|
* instead of looping back up the dirp to the mount
|
|
* point??
|
|
* Also, needs to know how to export all types of local
|
|
* exportable filesystems and not just "ufs".
|
|
*/
|
|
iov[1].iov_base = fsb->f_fstypename; /* "fstype" */
|
|
iov[1].iov_len = strlen(fsb->f_fstypename) + 1;
|
|
iov[3].iov_base = fsb->f_mntonname; /* "fspath" */
|
|
iov[3].iov_len = strlen(fsb->f_mntonname) + 1;
|
|
iov[5].iov_base = fsb->f_mntfromname; /* "from" */
|
|
iov[5].iov_len = strlen(fsb->f_mntfromname) + 1;
|
|
errmsg[0] = '\0';
|
|
|
|
while (nmount(iov, iovlen, fsb->f_flags) < 0) {
|
|
if (cp)
|
|
*cp-- = savedc;
|
|
else
|
|
cp = dirp + dirplen - 1;
|
|
if (opt_flags & OP_QUIET) {
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
if (errno == EPERM) {
|
|
if (debug)
|
|
warnx("can't change attributes for %s: %s",
|
|
dirp, errmsg);
|
|
syslog(LOG_ERR,
|
|
"can't change attributes for %s: %s",
|
|
dirp, errmsg);
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
if (opt_flags & OP_ALLDIRS) {
|
|
if (errno == EINVAL)
|
|
syslog(LOG_ERR,
|
|
"-alldirs requested but %s is not a filesystem mountpoint",
|
|
dirp);
|
|
else
|
|
syslog(LOG_ERR,
|
|
"could not remount %s: %m",
|
|
dirp);
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
/* back up over the last component */
|
|
while (*cp == '/' && cp > dirp)
|
|
cp--;
|
|
while (*(cp - 1) != '/' && cp > dirp)
|
|
cp--;
|
|
if (cp == dirp) {
|
|
if (debug)
|
|
warnx("mnt unsucc");
|
|
syslog(LOG_ERR, "can't export %s %s",
|
|
dirp, errmsg);
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
savedc = *cp;
|
|
*cp = '\0';
|
|
/*
|
|
* Check that we're still on the same
|
|
* filesystem.
|
|
*/
|
|
if (statfs(dirp, &fsb1) != 0 ||
|
|
bcmp(&fsb1.f_fsid, &fsb->f_fsid,
|
|
sizeof (fsb1.f_fsid)) != 0) {
|
|
*cp = savedc;
|
|
syslog(LOG_ERR,
|
|
"can't export %s %s", dirp,
|
|
errmsg);
|
|
ret = 1;
|
|
goto error_exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For the experimental server:
|
|
* If this is the public directory, get the file handle
|
|
* and load it into the kernel via the nfssvc() syscall.
|
|
*/
|
|
if ((exflags & MNT_EXPUBLIC) != 0) {
|
|
fhandle_t fh;
|
|
char *public_name;
|
|
|
|
if (eap->ex_indexfile != NULL)
|
|
public_name = eap->ex_indexfile;
|
|
else
|
|
public_name = dirp;
|
|
if (getfh(public_name, &fh) < 0)
|
|
syslog(LOG_ERR,
|
|
"Can't get public fh for %s", public_name);
|
|
else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0)
|
|
syslog(LOG_ERR,
|
|
"Can't set public fh for %s", public_name);
|
|
else {
|
|
has_publicfh = 1;
|
|
has_set_publicfh = 1;
|
|
ep->ex_flag |= EX_PUBLICFH;
|
|
}
|
|
}
|
|
skip:
|
|
if (ai != NULL)
|
|
ai = ai->ai_next;
|
|
if (ai == NULL)
|
|
done = TRUE;
|
|
}
|
|
if (cp)
|
|
*cp = savedc;
|
|
error_exit:
|
|
/* free strings allocated by strdup() in getmntopts.c */
|
|
if (iov != NULL) {
|
|
free(iov[0].iov_base); /* fstype */
|
|
free(iov[2].iov_base); /* fspath */
|
|
free(iov[4].iov_base); /* from */
|
|
free(iov[6].iov_base); /* update */
|
|
free(iov[8].iov_base); /* export */
|
|
free(iov[10].iov_base); /* errmsg */
|
|
|
|
/* free iov, allocated by realloc() */
|
|
free(iov);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Translate a net address.
|
|
*
|
|
* If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
|
|
*/
|
|
static int
|
|
get_net(char *cp, struct netmsk *net, int maskflg)
|
|
{
|
|
struct netent *np = NULL;
|
|
char *name, *p, *prefp;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr *sa = NULL;
|
|
struct addrinfo hints, *ai = NULL;
|
|
char netname[NI_MAXHOST];
|
|
long preflen;
|
|
|
|
p = prefp = NULL;
|
|
if ((opt_flags & OP_MASKLEN) && !maskflg) {
|
|
p = strchr(cp, '/');
|
|
*p = '\0';
|
|
prefp = p + 1;
|
|
}
|
|
|
|
/*
|
|
* Check for a numeric address first. We wish to avoid
|
|
* possible DNS lookups in getnetbyname().
|
|
*/
|
|
if (isxdigit(*cp) || *cp == ':') {
|
|
memset(&hints, 0, sizeof hints);
|
|
/* Ensure the mask and the network have the same family. */
|
|
if (maskflg && (opt_flags & OP_NET))
|
|
hints.ai_family = net->nt_net.ss_family;
|
|
else if (!maskflg && (opt_flags & OP_HAVEMASK))
|
|
hints.ai_family = net->nt_mask.ss_family;
|
|
else
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
|
|
sa = ai->ai_addr;
|
|
if (sa != NULL && ai->ai_family == AF_INET) {
|
|
/*
|
|
* The address in `cp' is really a network address, so
|
|
* use inet_network() to re-interpret this correctly.
|
|
* e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
|
|
*/
|
|
bzero(&sin, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof sin;
|
|
sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
|
|
if (debug)
|
|
fprintf(stderr, "get_net: v4 addr %s\n",
|
|
inet_ntoa(sin.sin_addr));
|
|
sa = (struct sockaddr *)&sin;
|
|
}
|
|
}
|
|
if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
|
|
bzero(&sin, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof sin;
|
|
sin.sin_addr = inet_makeaddr(np->n_net, 0);
|
|
sa = (struct sockaddr *)&sin;
|
|
}
|
|
if (sa == NULL)
|
|
goto fail;
|
|
|
|
if (maskflg) {
|
|
/* The specified sockaddr is a mask. */
|
|
if (checkmask(sa) != 0)
|
|
goto fail;
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
opt_flags |= OP_HAVEMASK;
|
|
} else {
|
|
/* The specified sockaddr is a network address. */
|
|
bcopy(sa, &net->nt_net, sa->sa_len);
|
|
|
|
/* Get a network name for the export list. */
|
|
if (np) {
|
|
name = np->n_name;
|
|
} else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
|
|
NULL, 0, NI_NUMERICHOST) == 0) {
|
|
name = netname;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
if ((net->nt_name = strdup(name)) == NULL)
|
|
out_of_mem();
|
|
|
|
/*
|
|
* Extract a mask from either a "/<masklen>" suffix, or
|
|
* from the class of an IPv4 address.
|
|
*/
|
|
if (opt_flags & OP_MASKLEN) {
|
|
preflen = strtol(prefp, NULL, 10);
|
|
if (preflen < 0L || preflen == LONG_MAX)
|
|
goto fail;
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
if (makemask(&net->nt_mask, (int)preflen) != 0)
|
|
goto fail;
|
|
opt_flags |= OP_HAVEMASK;
|
|
*p = '/';
|
|
} else if (sa->sa_family == AF_INET &&
|
|
(opt_flags & OP_MASK) == 0) {
|
|
in_addr_t addr;
|
|
|
|
addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
|
|
if (IN_CLASSA(addr))
|
|
preflen = 8;
|
|
else if (IN_CLASSB(addr))
|
|
preflen = 16;
|
|
else if (IN_CLASSC(addr))
|
|
preflen = 24;
|
|
else if (IN_CLASSD(addr))
|
|
preflen = 28;
|
|
else
|
|
preflen = 32; /* XXX */
|
|
|
|
bcopy(sa, &net->nt_mask, sa->sa_len);
|
|
makemask(&net->nt_mask, (int)preflen);
|
|
opt_flags |= OP_HAVEMASK;
|
|
}
|
|
}
|
|
|
|
if (ai)
|
|
freeaddrinfo(ai);
|
|
return 0;
|
|
|
|
fail:
|
|
if (ai)
|
|
freeaddrinfo(ai);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Parse out the next white space separated field
|
|
*/
|
|
static void
|
|
nextfield(char **cp, char **endcp)
|
|
{
|
|
char *p;
|
|
char quot = 0;
|
|
|
|
p = *cp;
|
|
while (*p == ' ' || *p == '\t')
|
|
p++;
|
|
*cp = p;
|
|
while (*p != '\0') {
|
|
if (quot) {
|
|
if (*p == quot)
|
|
quot = 0;
|
|
} else {
|
|
if (*p == '\\' && *(p + 1) != '\0')
|
|
p++;
|
|
else if (*p == '\'' || *p == '"')
|
|
quot = *p;
|
|
else if (*p == ' ' || *p == '\t')
|
|
break;
|
|
}
|
|
p++;
|
|
};
|
|
*endcp = p;
|
|
}
|
|
|
|
/*
|
|
* Get an exports file line. Skip over blank lines and handle line
|
|
* continuations.
|
|
*/
|
|
static int
|
|
get_line(void)
|
|
{
|
|
char *p, *cp;
|
|
size_t len;
|
|
int totlen, cont_line;
|
|
|
|
/*
|
|
* Loop around ignoring blank lines and getting all continuation lines.
|
|
*/
|
|
p = line;
|
|
totlen = 0;
|
|
do {
|
|
if ((p = fgetln(exp_file, &len)) == NULL)
|
|
return (0);
|
|
cp = p + len - 1;
|
|
cont_line = 0;
|
|
while (cp >= p &&
|
|
(*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
|
|
if (*cp == '\\')
|
|
cont_line = 1;
|
|
cp--;
|
|
len--;
|
|
}
|
|
if (cont_line) {
|
|
*++cp = ' ';
|
|
len++;
|
|
}
|
|
if (linesize < len + totlen + 1) {
|
|
linesize = len + totlen + 1;
|
|
line = realloc(line, linesize);
|
|
if (line == NULL)
|
|
out_of_mem();
|
|
}
|
|
memcpy(line + totlen, p, len);
|
|
totlen += len;
|
|
line[totlen] = '\0';
|
|
} while (totlen == 0 || cont_line);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Parse a description of a credential.
|
|
*/
|
|
static void
|
|
parsecred(char *namelist, struct xucred *cr)
|
|
{
|
|
char *name;
|
|
int cnt;
|
|
char *names;
|
|
struct passwd *pw;
|
|
struct group *gr;
|
|
gid_t groups[XU_NGROUPS + 1];
|
|
int ngroups;
|
|
|
|
cr->cr_version = XUCRED_VERSION;
|
|
/*
|
|
* Set up the unprivileged user.
|
|
*/
|
|
cr->cr_uid = 65534;
|
|
cr->cr_groups[0] = 65533;
|
|
cr->cr_ngroups = 1;
|
|
/*
|
|
* Get the user's password table entry.
|
|
*/
|
|
names = namelist;
|
|
name = strsep_quote(&names, ":");
|
|
/* Bug? name could be NULL here */
|
|
if (isdigit(*name) || *name == '-')
|
|
pw = getpwuid(atoi(name));
|
|
else
|
|
pw = getpwnam(name);
|
|
/*
|
|
* Credentials specified as those of a user.
|
|
*/
|
|
if (names == NULL) {
|
|
if (pw == NULL) {
|
|
syslog(LOG_ERR, "unknown user: %s", name);
|
|
return;
|
|
}
|
|
cr->cr_uid = pw->pw_uid;
|
|
ngroups = XU_NGROUPS + 1;
|
|
if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) {
|
|
syslog(LOG_ERR, "too many groups");
|
|
ngroups = XU_NGROUPS + 1;
|
|
}
|
|
|
|
/*
|
|
* Compress out duplicate.
|
|
*/
|
|
cr->cr_ngroups = ngroups - 1;
|
|
cr->cr_groups[0] = groups[0];
|
|
for (cnt = 2; cnt < ngroups; cnt++)
|
|
cr->cr_groups[cnt - 1] = groups[cnt];
|
|
return;
|
|
}
|
|
/*
|
|
* Explicit credential specified as a colon separated list:
|
|
* uid:gid:gid:...
|
|
*/
|
|
if (pw != NULL)
|
|
cr->cr_uid = pw->pw_uid;
|
|
else if (isdigit(*name) || *name == '-')
|
|
cr->cr_uid = atoi(name);
|
|
else {
|
|
syslog(LOG_ERR, "unknown user: %s", name);
|
|
return;
|
|
}
|
|
cr->cr_ngroups = 0;
|
|
while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) {
|
|
name = strsep_quote(&names, ":");
|
|
if (isdigit(*name) || *name == '-') {
|
|
cr->cr_groups[cr->cr_ngroups++] = atoi(name);
|
|
} else {
|
|
if ((gr = getgrnam(name)) == NULL) {
|
|
syslog(LOG_ERR, "unknown group: %s", name);
|
|
continue;
|
|
}
|
|
cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
|
|
}
|
|
}
|
|
if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS)
|
|
syslog(LOG_ERR, "too many groups");
|
|
}
|
|
|
|
#define STRSIZ (MNTNAMLEN+MNTPATHLEN+50)
|
|
/*
|
|
* Routines that maintain the remote mounttab
|
|
*/
|
|
static void
|
|
get_mountlist(void)
|
|
{
|
|
struct mountlist *mlp;
|
|
char *host, *dirp, *cp;
|
|
char str[STRSIZ];
|
|
FILE *mlfile;
|
|
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
|
|
if (errno == ENOENT)
|
|
return;
|
|
else {
|
|
syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
}
|
|
while (fgets(str, STRSIZ, mlfile) != NULL) {
|
|
cp = str;
|
|
host = strsep(&cp, " \t\n");
|
|
dirp = strsep(&cp, " \t\n");
|
|
if (host == NULL || dirp == NULL)
|
|
continue;
|
|
mlp = (struct mountlist *)malloc(sizeof (*mlp));
|
|
if (mlp == (struct mountlist *)NULL)
|
|
out_of_mem();
|
|
strncpy(mlp->ml_host, host, MNTNAMLEN);
|
|
mlp->ml_host[MNTNAMLEN] = '\0';
|
|
strncpy(mlp->ml_dirp, dirp, MNTPATHLEN);
|
|
mlp->ml_dirp[MNTPATHLEN] = '\0';
|
|
|
|
SLIST_INSERT_HEAD(&mlhead, mlp, next);
|
|
}
|
|
fclose(mlfile);
|
|
}
|
|
|
|
static void
|
|
del_mlist(char *hostp, char *dirp)
|
|
{
|
|
struct mountlist *mlp, *mlp2;
|
|
FILE *mlfile;
|
|
int fnd = 0;
|
|
|
|
SLIST_FOREACH_SAFE(mlp, &mlhead, next, mlp2) {
|
|
if (!strcmp(mlp->ml_host, hostp) &&
|
|
(!dirp || !strcmp(mlp->ml_dirp, dirp))) {
|
|
fnd = 1;
|
|
SLIST_REMOVE(&mlhead, mlp, mountlist, next);
|
|
free((caddr_t)mlp);
|
|
}
|
|
}
|
|
if (fnd) {
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
|
|
syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
SLIST_FOREACH(mlp, &mlhead, next) {
|
|
fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
|
|
}
|
|
fclose(mlfile);
|
|
}
|
|
}
|
|
|
|
static void
|
|
add_mlist(char *hostp, char *dirp)
|
|
{
|
|
struct mountlist *mlp;
|
|
FILE *mlfile;
|
|
|
|
SLIST_FOREACH(mlp, &mlhead, next) {
|
|
if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
|
|
return;
|
|
}
|
|
|
|
mlp = (struct mountlist *)malloc(sizeof (*mlp));
|
|
if (mlp == (struct mountlist *)NULL)
|
|
out_of_mem();
|
|
strncpy(mlp->ml_host, hostp, MNTNAMLEN);
|
|
mlp->ml_host[MNTNAMLEN] = '\0';
|
|
strncpy(mlp->ml_dirp, dirp, MNTPATHLEN);
|
|
mlp->ml_dirp[MNTPATHLEN] = '\0';
|
|
SLIST_INSERT_HEAD(&mlhead, mlp, next);
|
|
if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
|
|
syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
|
|
return;
|
|
}
|
|
fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
|
|
fclose(mlfile);
|
|
}
|
|
|
|
/*
|
|
* Free up a group list.
|
|
*/
|
|
static void
|
|
free_grp(struct grouplist *grp)
|
|
{
|
|
if (grp->gr_type == GT_HOST) {
|
|
if (grp->gr_ptr.gt_addrinfo != NULL)
|
|
freeaddrinfo(grp->gr_ptr.gt_addrinfo);
|
|
} else if (grp->gr_type == GT_NET) {
|
|
if (grp->gr_ptr.gt_net.nt_name)
|
|
free(grp->gr_ptr.gt_net.nt_name);
|
|
}
|
|
free((caddr_t)grp);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
SYSLOG(int pri, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
/*
|
|
* Check options for consistency.
|
|
*/
|
|
static int
|
|
check_options(struct dirlist *dp)
|
|
{
|
|
|
|
if (v4root_phase == 0 && dp == NULL)
|
|
return (1);
|
|
if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) {
|
|
syslog(LOG_ERR, "-mapall and -maproot mutually exclusive");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
|
|
syslog(LOG_ERR, "-mask requires -network");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
|
|
syslog(LOG_ERR, "-network requires mask specification");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
|
|
syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
|
|
return (1);
|
|
}
|
|
if (v4root_phase > 0 &&
|
|
(opt_flags &
|
|
~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) {
|
|
syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:");
|
|
return (1);
|
|
}
|
|
if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
|
|
syslog(LOG_ERR, "-alldirs has multiple directories");
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check an absolute directory path for any symbolic links. Return true
|
|
*/
|
|
static int
|
|
check_dirpath(char *dirp)
|
|
{
|
|
char *cp;
|
|
int ret = 1;
|
|
struct stat sb;
|
|
|
|
cp = dirp + 1;
|
|
while (*cp && ret) {
|
|
if (*cp == '/') {
|
|
*cp = '\0';
|
|
if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
|
|
ret = 0;
|
|
*cp = '/';
|
|
}
|
|
cp++;
|
|
}
|
|
if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
|
|
ret = 0;
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Make a netmask according to the specified prefix length. The ss_family
|
|
* and other non-address fields must be initialised before calling this.
|
|
*/
|
|
static int
|
|
makemask(struct sockaddr_storage *ssp, int bitlen)
|
|
{
|
|
u_char *p;
|
|
int bits, i, len;
|
|
|
|
if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
|
|
return (-1);
|
|
if (bitlen > len * CHAR_BIT)
|
|
return (-1);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
bits = MIN(CHAR_BIT, bitlen);
|
|
*p++ = (u_char)~0 << (CHAR_BIT - bits);
|
|
bitlen -= bits;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check that the sockaddr is a valid netmask. Returns 0 if the mask
|
|
* is acceptable (i.e. of the form 1...10....0).
|
|
*/
|
|
static int
|
|
checkmask(struct sockaddr *sa)
|
|
{
|
|
u_char *mask;
|
|
int i, len;
|
|
|
|
if ((mask = sa_rawaddr(sa, &len)) == NULL)
|
|
return (-1);
|
|
|
|
for (i = 0; i < len; i++)
|
|
if (mask[i] != 0xff)
|
|
break;
|
|
if (i < len) {
|
|
if (~mask[i] & (u_char)(~mask[i] + 1))
|
|
return (-1);
|
|
i++;
|
|
}
|
|
for (; i < len; i++)
|
|
if (mask[i] != 0)
|
|
return (-1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Compare two sockaddrs according to a specified mask. Return zero if
|
|
* `sa1' matches `sa2' when filtered by the netmask in `samask'.
|
|
* If samask is NULL, perform a full comparison.
|
|
*/
|
|
static int
|
|
sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
|
|
{
|
|
unsigned char *p1, *p2, *mask;
|
|
int len, i;
|
|
|
|
if (sa1->sa_family != sa2->sa_family ||
|
|
(p1 = sa_rawaddr(sa1, &len)) == NULL ||
|
|
(p2 = sa_rawaddr(sa2, NULL)) == NULL)
|
|
return (1);
|
|
|
|
switch (sa1->sa_family) {
|
|
case AF_INET6:
|
|
if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
|
|
((struct sockaddr_in6 *)sa2)->sin6_scope_id)
|
|
return (1);
|
|
break;
|
|
}
|
|
|
|
/* Simple binary comparison if no mask specified. */
|
|
if (samask == NULL)
|
|
return (memcmp(p1, p2, len));
|
|
|
|
/* Set up the mask, and do a mask-based comparison. */
|
|
if (sa1->sa_family != samask->sa_family ||
|
|
(mask = sa_rawaddr(samask, NULL)) == NULL)
|
|
return (1);
|
|
|
|
for (i = 0; i < len; i++)
|
|
if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return a pointer to the part of the sockaddr that contains the
|
|
* raw address, and set *nbytes to its length in bytes. Returns
|
|
* NULL if the address family is unknown.
|
|
*/
|
|
static void *
|
|
sa_rawaddr(struct sockaddr *sa, int *nbytes) {
|
|
void *p;
|
|
int len;
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
|
|
p = &((struct sockaddr_in *)sa)->sin_addr;
|
|
break;
|
|
case AF_INET6:
|
|
len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
|
|
p = &((struct sockaddr_in6 *)sa)->sin6_addr;
|
|
break;
|
|
default:
|
|
p = NULL;
|
|
len = 0;
|
|
}
|
|
|
|
if (nbytes != NULL)
|
|
*nbytes = len;
|
|
return (p);
|
|
}
|
|
|
|
static void
|
|
huphandler(int sig __unused)
|
|
{
|
|
|
|
got_sighup = 1;
|
|
}
|
|
|
|
static void
|
|
terminate(int sig __unused)
|
|
{
|
|
pidfile_remove(pfh);
|
|
rpcb_unset(MOUNTPROG, MOUNTVERS, NULL);
|
|
rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL);
|
|
exit (0);
|
|
}
|