295 lines
9.5 KiB
C
295 lines
9.5 KiB
C
/* $NetBSD: mount_fs.c,v 1.1.1.4 1997/10/26 00:02:16 christos Exp $ */
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/*
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* Copyright (c) 1997 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: mount_fs.c,v 5.2.2.2 1992/05/31 16:35:45 jsp Exp
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amu.h>
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/* ensure that mount table options are delimited by a comma */
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#define append_opts(old, new) { \
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if (*(old) != '\0') strcat(old, ","); \
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strcat(old, new); }
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/*
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* Standard mount flags
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*/
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struct opt_tab mnt_flags[] =
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{
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#if defined(MNT2_GEN_OPT_RDONLY) && defined(MNTTAB_OPT_RO)
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{MNTTAB_OPT_RO, MNT2_GEN_OPT_RDONLY},
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#endif /* defined(MNT2_GEN_OPT_RDONLY) && defined(MNTTAB_OPT_RO) */
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#if defined(MNT2_GEN_OPT_NOCACHE) && defined(MNTTAB_OPT_NOCACHE)
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{MNTTAB_OPT_NOCACHE, MNT2_GEN_OPT_NOCACHE},
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#endif /* defined(MNT2_GEN_OPT_NOCACHE) && defined(MNTTAB_OPT_NOCACHE) */
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#if defined(MNT2_GEN_OPT_GRPID) && defined(MNTTAB_OPT_GRPID)
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{MNTTAB_OPT_GRPID, MNT2_GEN_OPT_GRPID},
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#endif /* defined(MNT2_GEN_OPT_GRPID) && defined(MNTTAB_OPT_GRPID) */
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#if defined(MNT2_GEN_OPT_MULTI) && defined(MNTTAB_OPT_MULTI)
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{MNTTAB_OPT_MULTI, MNT2_GEN_OPT_MULTI},
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#endif /* defined(MNT2_GEN_OPT_MULTI) && defined(MNTTAB_OPT_MULTI) */
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#if defined(MNT2_GEN_OPT_NODEV) && defined(MNTTAB_OPT_NODEV)
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{MNTTAB_OPT_NODEV, MNT2_GEN_OPT_NODEV},
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#endif /* defined(MNT2_GEN_OPT_NODEV) && defined(MNTTAB_OPT_NODEV) */
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#if defined(MNT2_GEN_OPT_NOEXEC) && defined(MNTTAB_OPT_NOEXEC)
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{MNTTAB_OPT_NOEXEC, MNT2_GEN_OPT_NOEXEC},
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#endif /* defined(MNT2_GEN_OPT_NOEXEC) && defined(MNTTAB_OPT_NOEXEC) */
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#if defined(MNT2_GEN_OPT_NOSUB) && defined(MNTTAB_OPT_NOSUB)
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{MNTTAB_OPT_NOSUB, MNT2_GEN_OPT_NOSUB},
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#endif /* defined(MNT2_GEN_OPT_NOSUB) && defined(MNTTAB_OPT_NOSUB) */
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#if defined(MNT2_GEN_OPT_NOSUID) && defined(MNTTAB_OPT_NOSUID)
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{MNTTAB_OPT_NOSUID, MNT2_GEN_OPT_NOSUID},
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#endif /* defined(MNT2_GEN_OPT_NOSUID) && defined(MNTTAB_OPT_NOSUID) */
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#if defined(MNT2_GEN_OPT_SYNC) && defined(MNTTAB_OPT_SYNC)
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{MNTTAB_OPT_SYNC, MNT2_GEN_OPT_SYNC},
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#endif /* defined(MNT2_GEN_OPT_SYNC) && defined(MNTTAB_OPT_SYNC) */
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#if defined(MNT2_GEN_OPT_OVERLAY) && defined(MNTTAB_OPT_OVERLAY)
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{MNTTAB_OPT_OVERLAY, MNT2_GEN_OPT_OVERLAY},
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#endif /* defined(MNT2_GEN_OPT_OVERLAY) && defined(MNTTAB_OPT_OVERLAY) */
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{0, 0}
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};
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int
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compute_mount_flags(mntent_t *mnt)
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{
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struct opt_tab *opt;
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int flags;
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#ifdef MNT2_GEN_OPT_NEWTYPE
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flags = MNT2_GEN_OPT_NEWTYPE;
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#else /* not MNT2_GEN_OPT_NEWTYPE */
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/* Not all machines have MNT2_GEN_OPT_NEWTYPE (HP-UX 9.01) */
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flags = 0;
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#endif /* not MNT2_GEN_OPT_NEWTYPE */
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/*
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* Crack basic mount options
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*/
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for (opt = mnt_flags; opt->opt; opt++)
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flags |= hasmntopt(mnt, opt->opt) ? opt->flag : 0;
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return flags;
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}
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int
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mount_fs(mntent_t *mnt, int flags, caddr_t mnt_data, int retry, MTYPE_TYPE type, u_long nfs_version, const char *nfs_proto, const char *mnttabname)
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{
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int error = 0;
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#ifdef MOUNT_TABLE_ON_FILE
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# ifdef MNTTAB_OPT_DEV
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struct stat stb;
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# endif /* MNTTAB_OPT_DEV */
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char *zopts = NULL, *xopts = NULL;
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# if defined(MNTTAB_OPT_DEV) || (defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)) || defined(MNTTAB_OPT_PROTO)
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char optsbuf[48];
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# endif /* defined(MNTTAB_OPT_DEV) || (defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)) || defined(MNTTAB_OPT_PROTO) */
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#endif /* MOUNT_TABLE_ON_FILE */
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#ifdef DEBUG
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char buf[80]; /* buffer for sprintf */
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#endif /* DEBUG */
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#ifdef DEBUG
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sprintf(buf, "%s%s%s",
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"%s fstype ", MTYPE_PRINTF_TYPE, " (%s) flags %#x (%s)");
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dlog(buf, mnt->mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);
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#endif /* DEBUG */
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again:
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clock_valid = 0;
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error = MOUNT_TRAP(type, mnt, flags, mnt_data);
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if (error < 0) {
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plog(XLOG_ERROR, "%s: mount: %m", mnt->mnt_dir);
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/*
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* The following code handles conditions which shouldn't
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* occur. They are possible either because amd screws up
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* in preparing for the mount, or because some human
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* messed with the mount point. Both have been known to
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* happen. -- stolcke 2/22/95
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*/
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if (errno == ENOENT) {
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/*
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* Occasionally the mount point vanishes, probably
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* due to some race condition. Just recreate it
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* as necessary.
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*/
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errno = mkdirs(mnt->mnt_dir, 0555);
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if (errno != 0 && errno != EEXIST)
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plog(XLOG_ERROR, "%s: mkdirs: %m", mnt->mnt_dir);
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else {
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plog(XLOG_WARNING, "extra mkdirs required for %s",
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mnt->mnt_dir);
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error = MOUNT_TRAP(type, mnt, flags, mnt_data);
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}
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} else if (errno == EBUSY) {
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/*
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* Also, sometimes unmount isn't called, e.g., because
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* our mountlist is garbled. This leaves old mount
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* points around which need to be removed before we
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* can mount something new in their place.
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*/
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errno = umount_fs(mnt->mnt_dir, mnttabname);
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if (errno != 0)
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plog(XLOG_ERROR, "%s: umount: %m", mnt->mnt_dir);
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else {
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plog(XLOG_WARNING, "extra umount required for %s",
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mnt->mnt_dir);
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error = MOUNT_TRAP(type, mnt, flags, mnt_data);
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}
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}
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}
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if (error < 0 && --retry > 0) {
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sleep(1);
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goto again;
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}
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if (error < 0) {
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return errno;
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}
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#ifdef MOUNT_TABLE_ON_FILE
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/*
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* Allocate memory for options:
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* dev=..., vers={2,3}, proto={tcp,udp}
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*/
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zopts = (char *) xmalloc(strlen(mnt->mnt_opts) + 48);
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/* copy standard options */
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xopts = mnt->mnt_opts;
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strcpy(zopts, xopts);
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# ifdef MNTTAB_OPT_DEV
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/* add the extra dev= field to the mount table */
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if (lstat(mnt->mnt_dir, &stb) == 0) {
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if (sizeof(stb.st_dev) == 2) /* e.g. SunOS 4.1 */
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sprintf(optsbuf, "%s=%04lx",
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MNTTAB_OPT_DEV, (u_long) stb.st_dev & 0xffff);
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else /* e.g. System Vr4 */
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sprintf(optsbuf, "%s=%08lx",
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MNTTAB_OPT_DEV, (u_long) stb.st_dev);
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append_opts(zopts, optsbuf);
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}
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# endif /* MNTTAB_OPT_DEV */
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# if defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)
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/*
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* add the extra vers={2,3} field to the mount table,
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* unless already specified by user
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*/
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if (nfs_version == NFS_VERSION3 &&
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hasmntval(mnt, MNTTAB_OPT_VERS) != NFS_VERSION3) {
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sprintf(optsbuf, "%s=%d", MNTTAB_OPT_VERS, NFS_VERSION3);
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append_opts(zopts, optsbuf);
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}
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# endif /* defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS) */
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# ifdef MNTTAB_OPT_PROTO
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/*
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* add the extra proto={tcp,udp} field to the mount table,
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* unless already specified by user.
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*/
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if (nfs_proto && !hasmntopt(mnt, MNTTAB_OPT_PROTO)) {
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sprintf(optsbuf, "%s=%s", MNTTAB_OPT_PROTO, nfs_proto);
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append_opts(zopts, optsbuf);
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}
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# endif /* MNTTAB_OPT_PROTO */
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/* finally, store the options into the mount table structure */
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mnt->mnt_opts = zopts;
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/*
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* Additional fields in mntent_t
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* are fixed up here
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*/
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# ifdef HAVE_FIELD_MNTENT_T_MNT_CNODE
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mnt->mnt_cnode = 0;
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# endif /* HAVE_FIELD_MNTENT_T_MNT_CNODE */
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# ifdef HAVE_FIELD_MNTENT_T_MNT_RO
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mnt->mnt_ro = (hasmntopt(mnt, MNTTAB_OPT_RO) != NULL);
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# endif /* HAVE_FIELD_MNTENT_T_MNT_RO */
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# ifdef HAVE_FIELD_MNTENT_T_MNT_TIME
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# ifdef HAVE_FIELD_MNTENT_T_MNT_TIME_STRING
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{ /* allocate enough space for a long */
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char *str = (char *) xmalloc(13 * sizeof(char));
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sprintf(str, "%ld", time((time_t *) NULL));
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mnt->mnt_time = str;
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}
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# else /* not HAVE_FIELD_MNTENT_T_MNT_TIME_STRING */
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mnt->mnt_time = time((time_t *) NULL);
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# endif /* not HAVE_FIELD_MNTENT_T_MNT_TIME_STRING */
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# endif /* HAVE_FIELD_MNTENT_T_MNT_TIME */
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write_mntent(mnt, mnttabname);
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# ifdef MNTTAB_OPT_DEV
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if (xopts) {
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free(mnt->mnt_opts);
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mnt->mnt_opts = xopts;
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}
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# endif /* MNTTAB_OPT_DEV */
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#endif /* MOUNT_TABLE_ON_FILE */
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return 0;
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}
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