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NetBSD/usr.sbin/amd/fsinfo/fsi_analyze.c

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/* $NetBSD: fsi_analyze.c,v 1.6 1998/08/08 22:33:34 christos Exp $ */
/*
* Copyright (c) 1997-1998 Erez Zadok
* Copyright (c) 1989 Jan-Simon Pendry
* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* %W% (Berkeley) %G%
*
* Id: fsi_analyze.c,v 5.2.2.1 1992/02/09 15:09:41 jsp beta
*
*/
/*
* Analyze filesystem declarations
*
* Note: most of this is magic!
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <fsi_data.h>
#include <fsinfo.h>
char *disk_fs_strings[] =
{
"fstype", "opts", "dumpset", "passno", "freq", "mount", "log", 0,
};
char *mount_strings[] =
{
"volname", "exportfs", 0,
};
char *fsmount_strings[] =
{
"as", "volname", "fstype", "opts", "from", 0,
};
char *host_strings[] =
{
"host", "netif", "config", "arch", "cluster", "os", 0,
};
char *ether_if_strings[] =
{
"inaddr", "netmask", "hwaddr", 0,
};
/*
* Strip off the trailing part of a domain
* to produce a short-form domain relative
* to the local host domain.
* Note that this has no effect if the domain
* names do not have the same number of
* components. If that restriction proves
* to be a problem then the loop needs recoding
* to skip from right to left and do partial
* matches along the way -- ie more expensive.
*/
void
domain_strip(char *otherdom, char *localdom)
{
char *p1, *p2;
if ((p1 = strchr(otherdom, '.')) &&
(p2 = strchr(localdom, '.')) &&
STREQ(p1 + 1, p2 + 1))
*p1 = '\0';
}
/*
* Take a little-endian domain name and
* transform into a big-endian Un*x pathname.
* For example: kiska.doc.ic -> ic/doc/kiska
*/
static char *
compute_hostpath(char *hn)
{
char *p = strdup(hn);
char *d;
char path[MAXPATHLEN];
domain_strip(p, hostname);
path[0] = '\0';
do {
d = strrchr(p, '.');
if (d) {
*d = 0;
strcat(path, d + 1);
strcat(path, "/");
} else {
strcat(path, p);
}
} while (d);
log("hostpath of '%s' is '%s'", hn, path);
strcpy(p, path);
return p;
}
static dict_ent *
find_volname(char *nn)
{
dict_ent *de;
char *p = strdup(nn);
char *q;
do {
log("Searching for volname %s", p);
de = dict_locate(dict_of_volnames, p);
q = strrchr(p, '/');
if (q)
*q = '\0';
} while (!de && q);
XFREE(p);
return de;
}
static void
show_required(ioloc *l, int mask, char *info, char *hostname, char *strings[])
{
int i;
log("mask left for %s:%s is %#x", hostname, info, mask);
for (i = 0; strings[i]; i++)
if (ISSET(mask, i))
lerror(l, "%s:%s needs field \"%s\"", hostname, info, strings[i]);
}
/*
* Check and fill in "exportfs" details.
* Make sure the m_exported field references
* the most local node with an "exportfs" entry.
*/
static int
check_exportfs(qelem *q, fsi_mount *e)
{
fsi_mount *mp;
int errors = 0;
ITER(mp, fsi_mount, q) {
if (ISSET(mp->m_mask, DM_EXPORTFS)) {
if (e)
lwarning(mp->m_ioloc, "%s has duplicate exportfs data", mp->m_name);
mp->m_exported = mp;
if (!ISSET(mp->m_mask, DM_VOLNAME))
set_mount(mp, DM_VOLNAME, strdup(mp->m_name));
} else {
mp->m_exported = e;
}
/*
* Recursively descend the mount tree
*/
if (mp->m_mount)
errors += check_exportfs(mp->m_mount, mp->m_exported);
/*
* If a volume name has been specified, but this node and none
* of its parents has been exported, report an error.
*/
if (ISSET(mp->m_mask, DM_VOLNAME) && !mp->m_exported) {
lerror(mp->m_ioloc, "%s has a volname but no exportfs data", mp->m_name);
errors++;
}
}
return errors;
}
static int
analyze_dkmount_tree(qelem *q, fsi_mount *parent, disk_fs *dk)
{
fsi_mount *mp;
int errors = 0;
ITER(mp, fsi_mount, q) {
log("Mount %s:", mp->m_name);
if (parent) {
char n[MAXPATHLEN];
sprintf(n, "%s/%s", parent->m_name, mp->m_name);
if (*mp->m_name == '/')
lerror(mp->m_ioloc, "sub-directory %s of %s starts with '/'", mp->m_name, parent->m_name);
else if (STREQ(mp->m_name, "default"))
lwarning(mp->m_ioloc, "sub-directory of %s is named \"default\"", parent->m_name);
log("Changing name %s to %s", mp->m_name, n);
XFREE(mp->m_name);
mp->m_name = strdup(n);
}
mp->m_name_len = strlen(mp->m_name);
mp->m_parent = parent;
mp->m_dk = dk;
if (mp->m_mount)
analyze_dkmount_tree(mp->m_mount, mp, dk);
}
return errors;
}
/*
* The mount tree is a singleton list
* containing the top-level mount
* point for a disk.
*/
static int
analyze_dkmounts(disk_fs *dk, qelem *q)
{
int errors = 0;
fsi_mount *mp, *mp2 = 0;
int i = 0;
/*
* First scan the list of subdirs to make
* sure there is only one - and remember it
*/
if (q) {
ITER(mp, fsi_mount, q) {
mp2 = mp;
i++;
}
}
/*
* Check...
*/
if (i < 1) {
lerror(dk->d_ioloc, "%s:%s has no mount point", dk->d_host->h_hostname, dk->d_dev);
return 1;
}
if (i > 1) {
lerror(dk->d_ioloc, "%s:%s has more than one mount point", dk->d_host->h_hostname, dk->d_dev);
errors++;
}
/*
* Now see if a default mount point is required
*/
if (STREQ(mp2->m_name, "default")) {
if (ISSET(mp2->m_mask, DM_VOLNAME)) {
char nbuf[1024];
compute_automount_point(nbuf, dk->d_host, mp2->m_volname);
XFREE(mp2->m_name);
mp2->m_name = strdup(nbuf);
log("%s:%s has default mount on %s", dk->d_host->h_hostname, dk->d_dev, mp2->m_name);
} else {
lerror(dk->d_ioloc, "no volname given for %s:%s", dk->d_host->h_hostname, dk->d_dev);
errors++;
}
}
/*
* Fill in the disk mount point
*/
if (!errors && mp2 && mp2->m_name)
dk->d_mountpt = strdup(mp2->m_name);
else
dk->d_mountpt = strdup("error");
/*
* Analyze the mount tree
*/
errors += analyze_dkmount_tree(q, 0, dk);
/*
* Analyze the export tree
*/
errors += check_exportfs(q, 0);
return errors;
}
static void
fixup_required_disk_info(disk_fs *dp)
{
/*
* "fstype"
*/
if (ISSET(dp->d_mask, DF_FSTYPE)) {
if (STREQ(dp->d_fstype, "swap")) {
/*
* Fixup for a swap device
*/
if (!ISSET(dp->d_mask, DF_PASSNO)) {
dp->d_passno = 0;
BITSET(dp->d_mask, DF_PASSNO);
} else if (dp->d_freq != 0) {
lwarning(dp->d_ioloc,
"Pass number for %s:%s is non-zero",
dp->d_host->h_hostname, dp->d_dev);
}
/*
* "freq"
*/
if (!ISSET(dp->d_mask, DF_FREQ)) {
dp->d_freq = 0;
BITSET(dp->d_mask, DF_FREQ);
} else if (dp->d_freq != 0) {
lwarning(dp->d_ioloc,
"dump frequency for %s:%s is non-zero",
dp->d_host->h_hostname, dp->d_dev);
}
/*
* "opts"
*/
if (!ISSET(dp->d_mask, DF_OPTS))
set_disk_fs(dp, DF_OPTS, strdup("swap"));
/*
* "mount"
*/
if (!ISSET(dp->d_mask, DF_MOUNT)) {
qelem *q = new_que();
fsi_mount *m = new_mount();
m->m_name = strdup("swap");
m->m_mount = new_que();
ins_que(&m->m_q, q->q_back);
dp->d_mount = q;
BITSET(dp->d_mask, DF_MOUNT);
} else {
lerror(dp->d_ioloc, "%s: mount field specified for swap partition", dp->d_host->h_hostname);
}
} else if (STREQ(dp->d_fstype, "export")) {
/*
* "passno"
*/
if (!ISSET(dp->d_mask, DF_PASSNO)) {
dp->d_passno = 0;
BITSET(dp->d_mask, DF_PASSNO);
} else if (dp->d_passno != 0) {
lwarning(dp->d_ioloc,
"pass number for %s:%s is non-zero",
dp->d_host->h_hostname, dp->d_dev);
}
/*
* "freq"
*/
if (!ISSET(dp->d_mask, DF_FREQ)) {
dp->d_freq = 0;
BITSET(dp->d_mask, DF_FREQ);
} else if (dp->d_freq != 0) {
lwarning(dp->d_ioloc,
"dump frequency for %s:%s is non-zero",
dp->d_host->h_hostname, dp->d_dev);
}
/*
* "opts"
*/
if (!ISSET(dp->d_mask, DF_OPTS))
set_disk_fs(dp, DF_OPTS, strdup("rw,defaults"));
}
}
}
static void
fixup_required_mount_info(fsmount *fp, dict_ent *de)
{
if (!ISSET(fp->f_mask, FM_FROM)) {
if (de->de_count != 1) {
lerror(fp->f_ioloc, "ambiguous mount: %s is a replicated filesystem", fp->f_volname);
} else {
dict_data *dd;
fsi_mount *mp = 0;
dd = AM_FIRST(dict_data, &de->de_q);
mp = (fsi_mount *) dd->dd_data;
if (!mp)
abort();
fp->f_ref = mp;
set_fsmount(fp, FM_FROM, mp->m_dk->d_host->h_hostname);
log("set: %s comes from %s", fp->f_volname, fp->f_from);
}
}
if (!ISSET(fp->f_mask, FM_FSTYPE)) {
set_fsmount(fp, FM_FSTYPE, strdup("nfs"));
log("set: fstype is %s", fp->f_fstype);
}
if (!ISSET(fp->f_mask, FM_OPTS)) {
set_fsmount(fp, FM_OPTS, strdup("rw,nosuid,grpid,defaults"));
log("set: opts are %s", fp->f_opts);
}
if (!ISSET(fp->f_mask, FM_LOCALNAME)) {
if (fp->f_ref) {
set_fsmount(fp, FM_LOCALNAME, strdup(fp->f_volname));
log("set: localname is %s", fp->f_localname);
} else {
lerror(fp->f_ioloc, "cannot determine localname since volname %s is not uniquely defined", fp->f_volname);
}
}
}
/*
* For each disk on a host
* analyze the mount information
* and fill in any derivable
* details.
*/
static void
analyze_drives(host *hp)
{
qelem *q = hp->h_disk_fs;
disk_fs *dp;
ITER(dp, disk_fs, q) {
int req;
log("Disk %s:", dp->d_dev);
dp->d_host = hp;
fixup_required_disk_info(dp);
req = ~dp->d_mask & DF_REQUIRED;
if (req)
show_required(dp->d_ioloc, req, dp->d_dev, hp->h_hostname, disk_fs_strings);
analyze_dkmounts(dp, dp->d_mount);
}
}
/*
* Check that all static mounts make sense and
* that the source volumes exist.
*/
static void
analyze_mounts(host *hp)
{
qelem *q = hp->h_mount;
fsmount *fp;
int netbootp = 0;
ITER(fp, fsmount, q) {
char *p;
char *nn = strdup(fp->f_volname);
int req;
dict_ent *de = (dict_ent *) NULL;
int found = 0;
int matched = 0;
if (ISSET(fp->f_mask, FM_DIRECT)) {
found = 1;
matched = 1;
} else
do {
p = 0;
de = find_volname(nn);
log("Mount: %s (trying %s)", fp->f_volname, nn);
if (de) {
found = 1;
/*
* Check that the from field is really exporting
* the filesystem requested.
* LBL: If fake mount, then don't care about
* consistency check.
*/
if (ISSET(fp->f_mask, FM_FROM) && !ISSET(fp->f_mask, FM_DIRECT)) {
dict_data *dd;
fsi_mount *mp2 = 0;
ITER(dd, dict_data, &de->de_q) {
fsi_mount *mp = (fsi_mount *) dd->dd_data;
if (STREQ(mp->m_dk->d_host->h_hostname, fp->f_from)) {
mp2 = mp;
break;
}
}
if (mp2) {
fp->f_ref = mp2;
matched = 1;
break;
}
} else {
matched = 1;
break;
}
}
p = strrchr(nn, '/');
if (p)
*p = 0;
} while (de && p);
XFREE(nn);
if (!found) {
lerror(fp->f_ioloc, "volname %s unknown", fp->f_volname);
} else if (matched) {
fixup_required_mount_info(fp, de);
req = ~fp->f_mask & FM_REQUIRED;
if (req) {
show_required(fp->f_ioloc, req, fp->f_volname, hp->h_hostname,
fsmount_strings);
} else if (STREQ(fp->f_localname, "/")) {
hp->h_netroot = fp;
netbootp |= FM_NETROOT;
} else if (STREQ(fp->f_localname, "swap")) {
hp->h_netswap = fp;
netbootp |= FM_NETSWAP;
}
} else {
lerror(fp->f_ioloc, "volname %s not exported from %s", fp->f_volname,
fp->f_from ? fp->f_from : "anywhere");
}
}
if (netbootp && (netbootp != FM_NETBOOT))
lerror(hp->h_ioloc, "network booting requires both root and swap areas");
}
void
analyze_hosts(qelem *q)
{
host *hp;
show_area_being_processed("analyze hosts", 5);
/*
* Check all drives
*/
ITER(hp, host, q) {
log("disks on host %s", hp->h_hostname);
show_new("ana-host");
hp->h_hostpath = compute_hostpath(hp->h_hostname);
if (hp->h_disk_fs)
analyze_drives(hp);
}
show_area_being_processed("analyze mounts", 5);
/*
* Check static mounts
*/
ITER(hp, host, q) {
log("mounts on host %s", hp->h_hostname);
show_new("ana-mount");
if (hp->h_mount)
analyze_mounts(hp);
}
}
/*
* Check an automount request
*/
static void
analyze_automount(automount *ap)
{
dict_ent *de = find_volname(ap->a_volname);
if (de) {
ap->a_mounted = de;
} else {
if (STREQ(ap->a_volname, ap->a_name))
lerror(ap->a_ioloc, "unknown volname %s automounted", ap->a_volname);
else
lerror(ap->a_ioloc, "unknown volname %s automounted on %s", ap->a_volname, ap->a_name);
}
}
static void
analyze_automount_tree(qelem *q, char *pref, int lvl)
{
automount *ap;
ITER(ap, automount, q) {
char nname[1024];
if (lvl > 0 || ap->a_mount)
if (ap->a_name[1] && strchr(ap->a_name + 1, '/'))
lerror(ap->a_ioloc, "not allowed '/' in a directory name");
sprintf(nname, "%s/%s", pref, ap->a_name);
XFREE(ap->a_name);
ap->a_name = strdup(nname[1] == '/' ? nname + 1 : nname);
log("automount point %s:", ap->a_name);
show_new("ana-automount");
if (ap->a_mount) {
analyze_automount_tree(ap->a_mount, ap->a_name, lvl + 1);
} else if (ap->a_hardwiredfs) {
log("\thardwired from %s to %s", ap->a_volname, ap->a_hardwiredfs);
} else if (ap->a_volname) {
log("\tautomount from %s", ap->a_volname);
analyze_automount(ap);
} else if (ap->a_symlink) {
log("\tsymlink to %s", ap->a_symlink);
} else {
ap->a_volname = strdup(ap->a_name);
log("\timplicit automount from %s", ap->a_volname);
analyze_automount(ap);
}
}
}
void
analyze_automounts(qelem *q)
{
auto_tree *tp;
show_area_being_processed("analyze automount", 5);
/*
* q is a list of automounts
*/
ITER(tp, auto_tree, q)
analyze_automount_tree(tp->t_mount, "", 0);
}
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