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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <ctype.h>
#include <malloc.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <limits.h>
#include <meta.h>
#include <svm.h>
#include <libsvm.h>
#define MODEBITS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
#define ISREG(A) (((A).st_mode & S_IFMT) == S_IFREG)
#define DEFAULT_ROOTDIR "/a"
/*
* FUNCTION: svm_start
* starts SDS/SVM configuration. If root mirroring exists then the
* components of the root mirror are returned in svmpp.
*
* INPUT: mntpnt - root mount point
* svmpp - prealloced structure to return components
* repl_state_flag - SVM_CONV/SVM_DONT_CONV
*
* RETURN:
* 0 - SUCCESS
* !0 - ERROR
* if > 0 errno
*/
int
svm_start(char *mntpnt, svm_info_t **svmpp, int repl_state_flag)
{
char *rootdir, *tf;
char *mdevnamep = NULL;
char system_file[PATH_MAX];
char mdconf[PATH_MAX];
int rval = 0;
if (mntpnt == NULL)
rootdir = DEFAULT_ROOTDIR;
else
rootdir = mntpnt;
if ((rval = snprintf(system_file, PATH_MAX, "%s%s",
rootdir, SYSTEM_FILE)) < 0) {
return (RET_ERROR);
}
if ((rval = snprintf(mdconf, PATH_MAX, "%s%s",
rootdir, MD_CONF)) < 0) {
return (RET_ERROR);
}
debug_printf("svm_start(): repl_state_flag %s\n",
(repl_state_flag == SVM_DONT_CONV) ? "SVM_DONT_CONV":
"SVM_CONV");
if (copyfile(MD_CONF, MD_CONF_ORIG))
return (RET_ERROR);
switch (rval = convert_bootlist(system_file, mdconf, &tf)) {
case 0:
case -1: /* found in etc/system flag */
break;
default: /* convert bootlist failed */
debug_printf("svm_start(): convert_bootlist failed."
"rval %d\n", rval);
goto errout;
}
if (repl_state_flag == SVM_DONT_CONV) {
rval = create_in_file_prop(PROP_KEEP_REPL_STATE, tf);
if (rval != 0)
goto errout;
}
if (is_upgrade_prop(PROP_DEVID_DESTROY)) {
rval = create_in_file_prop(PROP_DEVID_DESTROY, tf);
/*
* For the idempotent behavior reset internal
* flag incase we have to return due to errors
*/
set_upgrade_prop(PROP_DEVID_DESTROY, 0);
if (rval != 0)
goto errout;
}
/*
* Since svm_start is called only after svm_check,
* we can assume that there is a valid metadb. If the mddb_bootlist
* is not found in etc/system, then it must be in md.conf which
* we copied to temporary file pointed to by tf
*/
if (copyfile(tf, MD_CONF)) {
debug_printf("svm_start(): copy of %s to %s failed\n", tf,
MD_CONF);
goto errout;
}
if ((rval = write_xlate_to_mdconf(rootdir)) != 0) {
debug_printf("svm_start(): write_xlate_to_mdconf(%s) failed\n",
rootdir);
goto errout;
}
if ((rval = write_targ_nm_table(rootdir)) != 0) {
goto errout;
}
/* run devfsadm to create the devices specified in md.conf */
if ((rval = system("/usr/sbin/devfsadm -r /tmp -p "
"/tmp/root/etc/path_to_inst -i md")) != 0) {
debug_printf("svm_start(): devfsadm -i md failed: %d\n", rval);
goto errout;
}
/*
* We have to unload md after the devfsadm run so that when metainit
* loads things it gets the right information from md.conf.
*/
if (rval = svm_stop()) {
debug_printf("svm_start(): svm_stop failed.\n");
return (RET_ERROR);
}
if ((rval = system("/usr/sbin/metainit -r")) != 0) {
debug_printf("svm_start(): metainit -r failed: %d\n", rval);
goto errout;
}
create_diskset_links();
if ((rval = system("/usr/sbin/metasync -r")) != 0) {
debug_printf("svm_start(): metasync -r failed: %d\n", rval);
goto errout;
}
/*
* We ignore failures from metadevadm, since it can fail if
* miniroot dev_t's don't match target dev_ts. But it still
* will update md.conf with device Id information which is
* why we are calling it here.
*/
(void) system("/usr/sbin/metadevadm -r");
/*
* check to see if we have a root metadevice and if so
* get its components.
*/
if ((rval = get_rootmetadevice(rootdir, &mdevnamep)) == 0) {
if (rval = get_mdcomponents(mdevnamep, svmpp)) {
debug_printf("svm_start(): get_mdcomponents(%s,..)"
"failed %d\n", mdevnamep, rval);
goto errout;
}
} else {
rval = 0; /* not a mirrored root */
debug_printf("svm_start(): get_rootmetadevice(%s,..) "
"No root mirrors! ", rootdir);
}
errout:
free(mdevnamep);
if (rval != 0) {
struct stat sbuf;
if (stat(MD_CONF_ORIG, &sbuf) == 0)
(void) copyfile(MD_CONF_ORIG, MD_CONF);
debug_printf("svm_start(): svm_start failed: %d\n", rval);
} else {
int i;
if ((*svmpp)->count > 0) {
debug_printf("svmpp: ");
debug_printf(" root_md: %s", (*svmpp)->root_md);
debug_printf(" count: %d", (*svmpp)->count);
for (i = 0; i < (*svmpp)->count; i++) {
debug_printf(" md_comps[%d]: %s", i,
(*svmpp)->md_comps[i]);
}
debug_printf(" \n");
} else {
if ((*svmpp)->count == 0)
debug_printf("svm_start(): no mirrored root\n");
}
debug_printf("svm_start(): svm_start succeeded.\n");
}
return (rval);
}
/*
* FUNCTION: copyfile
*
* INPUT: self descriptive
*
* RETURN:
* RET_SUCCESS
* RET_ERROR
*/
int
copyfile(char *from, char *to)
{
int fromfd, tofd;
char buf[1024];
ssize_t rbytes;
struct stat fromstat;
if ((fromfd = open(from, O_RDONLY | O_NDELAY)) < 0)
return (RET_ERROR);
if ((fstat(fromfd, &fromstat) < 0) || ! ISREG(fromstat)) {
(void) close(fromfd);
return (RET_ERROR);
}
if ((tofd = open(to, O_CREAT | O_WRONLY | O_TRUNC,
(fromstat.st_mode & MODEBITS))) < 0) {
(void) close(fromfd);
return (RET_ERROR);
}
/*
* in case the file exists then perm is forced by this chmod
*/
(void) fchmod(tofd, fromstat.st_mode & MODEBITS);
for (;;) {
rbytes = read(fromfd, buf, sizeof (buf));
/*
* no need to check for negative values since the file
* has been successfully stat'ed
*/
if (rbytes == 0)
break;
if (write(tofd, buf, rbytes) != rbytes) {
rbytes = -1;
break;
}
}
(void) close(fromfd);
(void) close(tofd);
if (rbytes < 0) {
(void) unlink(to);
return (RET_ERROR);
}
return (RET_SUCCESS);
}
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