OpenSolaris_b135/lib/librdc/common/rdcrules.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/mdb_modapi.h>
#include <stdio.h>
#include <errno.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <libintl.h>
#include <sys/stream.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <thread.h>
#include <pthread.h>
#include <sys/unistat/spcs_s.h>
#include <sys/unistat/spcs_s_u.h>
#include <sys/unistat/spcs_s_impl.h>
#include <sys/unistat/spcs_errors.h>
#include <sys/nsctl/rdc_io.h>
#include <sys/nsctl/rdc_ioctl.h>
#include <sys/nsctl/rdc_prot.h>
#include <sys/nsctl/librdc.h>
#include <sys/nsctl/rdcerr.h>
#include <sys/nsctl/cfg.h>
#include <sys/unistat/spcs_dtrinkets.h>
#include <sys/unistat/spcs_etrinkets.h>
#include <sys/socket.h>
#include <sys/mnttab.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <rpc/rpc_com.h>
#include <rpc/rpc.h>
#define RDC_LOCAL_TAG "local"
/*
* bitmap_in_use
* return 1 if in use
* return 0 if not in use
* return -1 on error
*/
int
bitmap_in_use(int cmd, char *hostp, char *bmp)
{
int i, setnumber;
CFGFILE *cfg;
char host[CFG_MAX_BUF];
char shost[CFG_MAX_BUF];
char pri[CFG_MAX_BUF]; /* rdc primary vol */
char sec[CFG_MAX_BUF]; /* rdc secondary vol */
char sbm[CFG_MAX_BUF]; /* rdc secondary bitmap */
char bit[CFG_MAX_BUF]; /* a bitmap */
char mas[CFG_MAX_BUF]; /* II master */
char sha[CFG_MAX_BUF]; /* II shadow */
char mod[CFG_MAX_BUF]; /* II mode */
char ovr[CFG_MAX_BUF]; /* II overflow */
char buf[CFG_MAX_BUF];
char key[CFG_MAX_KEY];
int rc;
int ret = 0;
if ((cfg = cfg_open(NULL)) == NULL) {
rdc_set_error(NULL, RDC_DSCFG, 0, NULL);
return (-1);
}
if (!cfg_lock(cfg, CFG_RDLOCK)) {
rdc_set_error(NULL, RDC_DSCFG, 0, NULL);
cfg_close(cfg);
return (-1);
}
/*
* look into II config to see if this is being used elsewhere
*/
/*CSTYLED*/
for (i = 0; ; i++) {
setnumber = i + 1;
snprintf(key, sizeof (key), "ii.set%d", setnumber);
if (cfg_get_cstring(cfg, key, buf, CFG_MAX_BUF) < 0)
break;
rc = sscanf(buf, "%s %s %s %s %s", mas, sha, bit, mod, ovr);
if (rc != 5) {
rdc_set_error(NULL, RDC_OS, 0, NULL);
ret = -1;
goto done;
}
/*
* got master shadow bitmap, now compare
*/
if ((strcmp(bmp, mas) == 0) ||
(strcmp(bmp, sha) == 0) ||
(strcmp(bmp, bit) == 0) ||
(strcmp(bmp, ovr) == 0)) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
"bitmap %s is in use by"
"Point-in-Time Copy", bmp);
ret = 1;
goto done;
}
}
/*
* and last but not least, make sure sndr is not using vol for anything
*/
/*CSTYLED*/
for (i = 0; ; i++) {
setnumber = i + 1;
snprintf(key, sizeof (key), "sndr.set%d", setnumber);
if (cfg_get_cstring(cfg, key, buf, CFG_MAX_BUF) < 0)
break;
/*
* I think this is quicker than
* having to double dip into the config
*/
(void) sscanf(buf, "%s %s %s %s %s %s", host, pri, bit,
shost, sec, sbm);
if (cmd == RDC_CMD_ENABLE) {
if (self_check(host)) {
if ((strcmp(bmp, pri) == 0) ||
(strcmp(bmp, bit) == 0)) {
rdc_set_error(NULL, RDC_INTERNAL,
RDC_NONFATAL, dgettext("librdc",
"bitmap %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
} else {
if ((strcmp(bmp, sec) == 0) ||
(strcmp(bmp, sbm) == 0)) {
rdc_set_error(NULL, RDC_INTERNAL,
RDC_NONFATAL, dgettext("librdc",
"bitmap %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
}
} else if (cmd == RDC_CMD_RECONFIG) {
/*
* read this logic 1000 times and consider
* multi homed, one to many, many to one (marketing)
* etc, etc, before changing
*/
if (self_check(hostp)) {
if (self_check(host)) {
if ((strcmp(bmp, pri) == 0) ||
(strcmp(bmp, bit) == 0)) {
rdc_set_error(NULL,
RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "bitmap"
" %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
} else {
if ((strcmp(hostp, shost) == 0) &&
(strcmp(bmp, sec) == 0) ||
(strcmp(bmp, sbm) == 0)) {
rdc_set_error(NULL,
RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "bitmap"
" %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
}
} else { /* self_check(hostp) failed */
if (self_check(host)) {
if ((strcmp(shost, hostp) == 0) &&
(strcmp(bmp, sec) == 0) ||
(strcmp(bmp, sbm) == 0)) {
rdc_set_error(NULL,
RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "bitmap"
" %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
} else {
if ((strcmp(host, hostp) == 0) &&
(strcmp(bmp, pri) == 0) ||
(strcmp(bmp, bit) == 0)) {
rdc_set_error(NULL,
RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "bitmap"
" %s is in use by %s"),
bmp, RDC_NAME_DU_JOUR);
ret = 1;
goto done;
}
}
}
}
}
done:
cfg_close(cfg);
return (ret);
}
int
check_dgislocal(char *dgname)
{
char *othernode;
int rc;
/*
* check where this disk service is mastered
*/
rc = cfg_dgname_islocal(dgname, &othernode);
if (rc < 0) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("unable to find "
"disk service, %s: %s"), dgname, strerror(errno));
return (-1);
}
if (rc == 0) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("disk service, %s, is "
"active on node \"%s\"\nPlease re-issue "
"the command on that node"), dgname, othernode);
return (-1);
}
return (DCMD_OK);
}
int
ctag_check(rdcconfig_t *rdc)
{
char *file_dgname;
char *bmp_dgname;
char *fromhost, *tohost;
char *fromfile, *tofile;
char *frombitmap, *tobitmap;
char *localfile;
char *ctag;
char file_buf[MAX_RDC_HOST_SIZE];
char bmp_buf[MAX_RDC_HOST_SIZE];
int is_primary;
int islocal = 0;
struct hostent *hp;
char fromname[MAXHOSTNAMELEN], toname[MAXHOSTNAMELEN];
fromhost = rdc->phost;
fromfile = rdc->pfile;
frombitmap = rdc->pbmp;
tohost = rdc->shost;
tofile = rdc->sfile;
tobitmap = rdc->sbmp;
ctag = rdc->ctag;
/*
* Check for the special (local) cluster tag
*/
if (!cfg_iscluster())
return (0);
if (ctag != NULL && strcmp(rdc->ctag, RDC_LOCAL_TAG) == 0) {
strcpy(rdc->ctag, "-");
islocal = TRUE;
} else {
islocal = FALSE;
}
hp = gethost_byname(fromhost);
strncpy(fromname, hp->h_name, MAXHOSTNAMELEN);
hp = gethost_byname(tohost);
strncpy(toname, hp->h_name, MAXHOSTNAMELEN);
if (!self_check(fromname) && !self_check(toname)) {
/*
* If we could get a list of logical hosts on this cluster
* then we could print something intelligent about where
* the volume is mastered. For now, just print some babble
* about the fact that we have no idea.
*/
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("either %s:%s or %s:%s is not local"),
fromhost, fromfile, tohost, tofile);
return (-1);
}
is_primary = self_check(fromname);
/*
* If implicit disk group name and no ctag specified by user,
* we set the ctag to it.
* If implicit disk group name, it must match any supplied ctag.
*/
if (is_primary)
localfile = fromfile;
else
localfile = tofile;
file_dgname = cfg_dgname(localfile, file_buf, sizeof (file_buf));
if (file_dgname != NULL && file_dgname[0] != '\0')
if (check_dgislocal(file_dgname) < 0) {
/* errors already set */
return (-1);
}
if (strlen(ctag) == 0 && file_dgname && strlen(file_dgname))
strncpy(ctag, file_dgname, MAX_RDC_HOST_SIZE);
/*
* making an exception here for users giving the "local"tag
* this overrides this error message. (rdc_islocal ! = 1)
*/
if (strlen(ctag) != 0 && file_dgname && islocal != 1 &&
strlen(file_dgname) != 0 &&
strncmp(ctag, file_dgname, MAX_RDC_HOST_SIZE) != 0) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("ctag \"%s\" does not "
"match disk group name \"%s\" of volume %s"), ctag,
file_dgname, localfile);
return (-1);
}
if ((file_dgname == NULL) || ((strlen(ctag) == 0) &&
(strlen(file_dgname) == 0))) {
/*
* we must have a non-volume managed disk here
* so ask for a tag and get out
*/
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("volume \"%s\" is not part"
" of a disk group,\nplease specify resource ctag\n"),
localfile);
}
/*
* Local bitmap must also have same ctag.
*/
if (is_primary)
localfile = frombitmap;
else
localfile = tobitmap;
bmp_dgname = cfg_dgname(localfile, bmp_buf, sizeof (bmp_buf));
if (bmp_dgname != NULL && bmp_dgname[0] != '\0')
if (check_dgislocal(bmp_dgname) < 0) {
/* error already set */
return (-1);
}
if (file_dgname && strlen(file_dgname) != 0) {
/* File is in a real disk group */
if ((bmp_dgname == NULL) || (strlen(bmp_dgname) == 0)) {
/* Bitmap is not in a real disk group */
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("bitmap %s is not in disk group \"%s\""),
localfile, islocal < 1?file_dgname:ctag);
return (-1);
}
}
if (strlen(ctag) != 0 && bmp_dgname && islocal != 1 &&
strlen(bmp_dgname) != 0 &&
strncmp(ctag, bmp_dgname, MAX_RDC_HOST_SIZE) != 0) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
gettext("ctag \"%s\" does not "
"match disk group name \"%s\" of bitmap %s"),
ctag, bmp_dgname, localfile);
return (-1);
}
return (0);
}
int
mounted(char *device)
{
char target[NSC_MAXPATH];
struct mnttab mntref;
struct mnttab mntent;
FILE *mntfp;
int rdsk;
char *s;
int rc;
int i;
rdsk = i = 0;
for (s = target; i < NSC_MAXPATH && (*s = *device++); i++) {
if (*s == 'r' && rdsk == 0 && strncmp(device, "dsk/", 4) == 0)
rdsk = 1;
else
s++;
}
*s = '\0';
mntref.mnt_special = target;
mntref.mnt_mountp = NULL;
mntref.mnt_fstype = NULL;
mntref.mnt_mntopts = NULL;
mntref.mnt_time = NULL;
mntfp = fopen(MNTTAB, "r");
if (mntfp == NULL) {
/* Assume the worst, that it is mounted */
return (1);
}
if ((rc = getmntany(mntfp, &mntent, &mntref)) != -1) {
/* found something before EOF */
fclose(mntfp);
return (1);
}
fclose(mntfp);
return (0);
}
int
can_enable(rdcconfig_t *rdc)
{
struct stat stb;
if ((strcmp(rdc->pfile, rdc->pbmp) == 0) ||
(strcmp(rdc->sfile, rdc->sbmp) == 0)) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "volumes and bitmaps must not match"));
return (0);
}
if (ctag_check(rdc) < 0) {
/* rdc_error should already be set */
return (0);
}
if (self_check(rdc->phost)) {
if (stat(rdc->pfile, &stb) != 0) {
rdc_set_error(NULL, RDC_OS, RDC_FATAL, NULL);
return (0);
}
if (!S_ISCHR(stb.st_mode)) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc", "%s is not a character device"),
rdc->pfile);
return (0);
}
return (rdc->persist ?
!bitmap_in_use(RDC_CMD_ENABLE, rdc->phost, rdc->pbmp) : 1);
} else { /* on the secondary */
if (stat(rdc->sfile, &stb) != 0) {
rdc_set_error(NULL, RDC_OS, 0,
dgettext("librdc", "unable to access %s: %s"),
rdc->sfile, strerror(errno));
}
if (!S_ISCHR(stb.st_mode)) {
rdc_set_error(NULL, RDC_INTERNAL, RDC_NONFATAL,
dgettext("librdc",
"%s is not a character device"), rdc->sfile);
}
return (rdc->persist ?
!bitmap_in_use(RDC_CMD_ENABLE, rdc->shost, rdc->sbmp) : 1);
}
}
int
can_reconfig_pbmp(rdcconfig_t *rdc, char *bmp)
{
if (!rdc->persist)
return (0);
return (!bitmap_in_use(RDC_CMD_RECONFIG, rdc->phost, bmp));
}
int
can_reconfig_sbmp(rdcconfig_t *rdc, char *bmp)
{
if (!rdc->persist)
return (0);
return (!bitmap_in_use(RDC_CMD_RECONFIG, rdc->shost, bmp));
}
rdc_rc_t *
cant_rsync(rdcconfig_t *rdc)
{
rdc_rc_t *rc;
if (mounted(rdc->pfile)) {
rc = new_rc();
if (rc == NULL)
return (NULL);
strncpy(rc->set.phost, rdc->phost, MAX_RDC_HOST_SIZE);
strncpy(rc->set.pfile, rdc->pfile, NSC_MAXPATH);
strncpy(rc->set.pbmp, rdc->pbmp, NSC_MAXPATH);
strncpy(rc->set.shost, rdc->shost, MAX_RDC_HOST_SIZE);
strncpy(rc->set.sfile, rdc->sfile, NSC_MAXPATH);
strncpy(rc->set.sbmp, rdc->sbmp, NSC_MAXPATH);
rc->rc = -1;
rdc_set_error(NULL, RDC_INTERNAL, 0, "unable to sync %s volume"
" is currently mounted", rdc->pfile);
strncpy(rc->msg, rdc_error(NULL), RDC_ERR_SIZE);
return (rc);
}
return (NULL);
}