iicpshd.c revision 570de38f63910201fdd77246630b7aa8f9dc5661
/*
* 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 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <values.h>
#include <locale.h>
#include <sys/stat.h>
#include <strings.h>
#include <stdarg.h>
#include <sys/param.h>
#include <nsctl.h>
#include <sys/nsctl/cfg.h>
#include <sys/unistat/spcs_s.h>
#include <sys/unistat/spcs_s_u.h>
#include <sys/unistat/spcs_errors.h>
#include <sys/nsctl/dsw.h>
#include <sys/nsctl/dsw_dev.h> /* for bitmap format */
#define DSW_TEXT_DOMAIN "II"
#define BITMAP_TOKEN "ii.set%d.bitmap"
#define SHADOW_TOKEN "ii.set%d.shadow"
#define SV_TOKEN "sv.set%d.vol"
#define DSVOL_TOKEN "dsvol.set%d.path"
void iicpshd_usage();
void copyshd(char *, char *);
int find_cfg_info(char *, char *);
int copy_shadow_vol(char *, char *);
void convert_to_blockdevice();
int update_dscfg(char *);
extern int optind;
extern char *optarg;
extern int optind, opterr, optopt;
int copy_shadow = 1;
CFGFILE *cfg;
char real_bitmap[DSW_NAMELEN];
char buf[CFG_MAX_BUF];
char key[CFG_MAX_KEY];
int set_number;
int sv_number;
int dsvol_number;
#ifdef lint
int
iicpshd_lintmain(int argc, char *argv[])
#else
int
main(int argc, char *argv[])
#endif
{
if (argc > 1) {
if (strcmp(argv[1], "-s") == 0) {
/* don't copy shadow, only update dscfg and ii header */
copy_shadow = 0;
argc--;
argv++;
}
}
if (argc == 1 || (argc%2) == 0) /* must have pairs of filenames */
iicpshd_usage();
/* open dscfg anyway */
if ((cfg = cfg_open(NULL)) == NULL) {
(void) fprintf(stderr, gettext("Error opening config\n"));
exit(1);
}
for (argv++; *argv != NULL; argv += 2)
copyshd(argv[0], argv[1]);
/* close dscfg */
cfg_close(cfg);
exit(0);
return (0);
}
void
iicpshd_usage()
{
(void) fprintf(stderr, gettext("Usage:\n"));
(void) fprintf(stderr,
gettext("\tiicpshd [-s] old_shadow new_shadow\n"));
exit(1);
}
void
copyshd(char *old_vol, char *new_vol)
{
int dsw_fd;
FILE *ifp;
char header[FBA_SIZE(1) * DSW_CBLK_FBA];
ii_header_t *hp;
dsw_stat_t args;
/*LINTED pointer alignment*/
hp = (ii_header_t *)&header;
dsw_fd = open(DSWDEV, O_RDONLY);
if (dsw_fd < 0) {
perror(DSWDEV);
exit(1);
}
if (*old_vol != '/' || *new_vol != '/') {
(void) fprintf(stderr, gettext("Both old and new shadow "
"file names must begin with a /.\n"));
exit(1);
}
if (strlen(new_vol) > DSW_NAMELEN) {
(void) fprintf(stderr,
gettext("New shadow name is to long.\n"));
exit(1);
}
/* check old shadow is in dscfg */
if (find_cfg_info(old_vol, SHADOW_TOKEN) == 0) {
(void) fprintf(stderr,
gettext("Old shadow not in existing cfg\n"));
exit(1);
}
/* check ii set status, suspend if need */
(void) strncpy(args.shadow_vol, old_vol, DSW_NAMELEN);
args.shadow_vol[DSW_NAMELEN-1] = '\0';
args.status = spcs_s_ucreate();
if (ioctl(dsw_fd, DSWIOC_STAT, &args) != -1) {
(void) fprintf(stderr, gettext("Suspend the Point-in-Time Copy "
"set first\n"));
(void) close(dsw_fd);
exit(1);
}
if (copy_shadow) {
if (copy_shadow_vol(old_vol, new_vol) == 0) {
perror(gettext("Write new shadow failed"));
(void) close(dsw_fd);
exit(1);
}
}
if (find_cfg_info(old_vol, SV_TOKEN) == 0) {
(void) fprintf(stderr,
gettext("Old shadow not in existing cfg\n"));
exit(1);
}
if (find_cfg_info(old_vol, DSVOL_TOKEN) == 0) {
(void) fprintf(stderr,
gettext("Old shadow not in existing cfg\n"));
exit(1);
}
if (strstr(real_bitmap, "/rdsk/") == NULL) {
(void) fprintf(stderr,
gettext("%s is not a character device\n"), real_bitmap);
exit(1);
}
/* use block device /dsk/ to update bitmap header */
convert_to_blockdevice();
/* open bitmap by using update mode */
if ((ifp = fopen(real_bitmap, "r+")) == NULL) {
(void) fprintf(stderr, gettext("Can't open bitmap file\n"));
exit(1);
}
/* Check old header looks like an II bitmap header */
if (fread(&header, DSW_CBLK_FBA, FBA_SIZE(1), ifp) != FBA_SIZE(1)) {
(void) fprintf(stderr, gettext("Can't read bitmap file\n"));
exit(1);
}
if (hp->ii_magic != DSW_CLEAN && hp->ii_magic != DSW_DIRTY) {
(void) fprintf(stderr,
gettext("%s is not a Point-in-Time Copy "
"shadow.\n"), old_vol);
exit(1);
}
if (strncmp(hp->shadow_vol, old_vol, DSW_NAMELEN) != 0) {
(void) fprintf(stderr, gettext("%s has Point-in-Time Copy "
"shadow magic number,\n"
"but does not contain correct data.\n"), old_vol);
exit(1);
}
(void) memset(hp->shadow_vol, 0, DSW_NAMELEN);
(void) strncpy(hp->shadow_vol, new_vol, DSW_NAMELEN);
/* reset the pointer position */
rewind(ifp);
if (fwrite(&header, DSW_CBLK_FBA, FBA_SIZE(1), ifp) != FBA_SIZE(1)) {
perror(new_vol);
(void) fprintf(stderr,
gettext("Can't write new bitmap header\n"));
exit(1);
}
(void) fclose(ifp);
(void) close(dsw_fd);
if (update_dscfg(new_vol) == 0) {
(void) fprintf(stderr, gettext("Failed to update dscfg.\n"));
exit(1);
} else {
spcs_log("ii", NULL,
"iicpshd copy shadow from %s to %s",
old_vol, new_vol);
}
}
/*
* find_cfg_info()
*
*/
int
find_cfg_info(char *volume, char *token)
{
int i;
/* get read lock */
if (!cfg_lock(cfg, CFG_RDLOCK)) {
spcs_log("ii", NULL,
"iicpbmp CFG_RDLOCK failed, errno %d", errno);
(void) fprintf(stderr, gettext("Error locking config\n"));
exit(1);
}
for (i = 1; ; i++) {
bzero(buf, CFG_MAX_BUF);
(void) snprintf(key, sizeof (key), token, i);
if (cfg_get_cstring(cfg, key, buf, DSW_NAMELEN) < 0) {
cfg_unlock(cfg);
return (0);
}
if (strcmp(buf, volume) == 0) {
if (strcmp(token, SHADOW_TOKEN) == 0) {
(void) snprintf(key, sizeof (key),
BITMAP_TOKEN, i);
(void) cfg_get_cstring(cfg, key,
real_bitmap, DSW_NAMELEN);
set_number = i;
} else if (strcmp(token, SV_TOKEN) == 0) {
sv_number = i;
} else if (strcmp(token, DSVOL_TOKEN) == 0) {
dsvol_number = i;
}
/* release read lock */
cfg_unlock(cfg);
return (1);
}
}
}
int
copy_shadow_vol(char *old_shadow, char *new_shadow) {
int i;
char cp_buffer[256];
FILE *ishdfp, *oshdfp;
if ((ishdfp = fopen(old_shadow, "r")) == NULL) {
(void) fprintf(stderr, gettext("Can't open old shadow file\n"));
return (0);
}
if ((oshdfp = fopen(new_shadow, "w")) == NULL) {
(void) fprintf(stderr, gettext("Can't open new shadow file\n"));
return (0);
}
/* Copy the shadow vol */
while ((i = fread(cp_buffer, sizeof (char), sizeof (cp_buffer), ishdfp))
> 0) {
if (fwrite(cp_buffer, sizeof (char), i, oshdfp) != i) {
(void) fclose(ishdfp);
(void) fclose(oshdfp);
return (0);
}
}
(void) fclose(ishdfp);
(void) fclose(oshdfp);
return (1);
}
int
update_dscfg(char *new_shadow) {
int len = strlen(new_shadow);
/* get write lock */
if (!cfg_lock(cfg, CFG_WRLOCK)) {
spcs_log("ii", NULL,
"iicpbmp CFG_WRLOCK failed, errno %d", errno);
(void) fprintf(stderr, gettext("Error locking config\n"));
return (0);
}
(void) sprintf(key, SHADOW_TOKEN, set_number);
if (cfg_put_cstring(cfg, key, new_shadow, len) < 0) {
perror("cfg_put_cstring");
return (0);
}
(void) sprintf(key, SV_TOKEN, sv_number);
if (cfg_put_cstring(cfg, key, new_shadow, len) < 0) {
perror("cfg_put_cstring");
return (0);
}
(void) sprintf(key, DSVOL_TOKEN, dsvol_number);
if (cfg_put_cstring(cfg, key, new_shadow, len) < 0) {
perror("cfg_put_cstring");
return (0);
}
(void) cfg_commit(cfg);
cfg_unlock(cfg);
return (1);
}
void
convert_to_blockdevice() {
int len = strlen(real_bitmap);
int i = 0, j = 0;
char *temp_string = malloc(len-1);
while (i < len + 1) {
if (real_bitmap[i] != 'r') {
temp_string[j] = real_bitmap[i];
j++;
}
i++;
}
(void) strcpy(real_bitmap, temp_string);
free(temp_string);
}