/*
- * Soft: Description here...
+ * Soft: multipath device mapper target autoconfig
*
* Version: $Id: main.h,v 0.0.1 2003/09/18 15:13:38 cvaroqui Exp $
*
return -1;
}
-static int
-do_tur(int fd)
-{
- unsigned char turCmdBlk[TUR_CMD_LEN] = { 0x00, 0, 0, 0, 0, 0 };
- struct sg_io_hdr io_hdr;
- unsigned char sense_buffer[32];
-
- memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
- io_hdr.interface_id = 'S';
- io_hdr.cmd_len = sizeof (turCmdBlk);
- io_hdr.mx_sb_len = sizeof (sense_buffer);
- io_hdr.dxfer_direction = SG_DXFER_NONE;
- io_hdr.cmdp = turCmdBlk;
- io_hdr.sbp = sense_buffer;
- io_hdr.timeout = 20000;
- io_hdr.pack_id = 0;
- if (ioctl(fd, SG_IO, &io_hdr) < 0) {
- close(fd);
- return 0;
- }
- if (io_hdr.info & SG_INFO_OK_MASK) {
- return 0;
- }
- return 1;
-}
-
static void
sprint_wwid(char * buff, const char * str)
{
*/
/* hardware vendor specifics : add support for new models below */
+
+/* this one get EVPD page 0x83 off 8 */
+/* tested ok with StorageWorks */
static int
-get_storageworks_wwid(int fd, char *str)
+get_evpd_wwid(int fd, char *str)
{
char buff[64];
static int
get_unique_id(int fd, struct path * mypath)
{
- if (strncmp(mypath->product_id, "HSV110 (C)COMPAQ", 16) == 0 ||
- strncmp(mypath->product_id, "HSG80 ", 16) == 0) {
- get_storageworks_wwid(fd, mypath->wwid);
- return 0;
- }
+ int i;
+ static struct {
+ char * vendor;
+ char * product;
+ int iopolicy;
+ int (*getuid) (int fd, char * wwid);
+ } wlist[] = {
+ {"COMPAQ ", "HSV110 (C)COMPAQ", MULTIBUS, &get_evpd_wwid},
+ {"COMPAQ ", "MSA1000 ", MULTIBUS, &get_evpd_wwid},
+ {"COMPAQ ", "MSA1000 VOLUME ", MULTIBUS, &get_evpd_wwid},
+ {"DEC ", "HSG80 ", MULTIBUS, &get_evpd_wwid},
+ {"HP ", "HSV100 ", MULTIBUS, &get_evpd_wwid},
+ {"HP ", "A6189A ", MULTIBUS, &get_evpd_wwid},
+ {"HP ", "OPEN- ", MULTIBUS, &get_evpd_wwid},
+ {"DDN ", "SAN DataDirector", MULTIBUS, &get_evpd_wwid},
+ {"FSC ", "CentricStor ", MULTIBUS, &get_evpd_wwid},
+ {"HITACHI ", "DF400 ", MULTIBUS, &get_evpd_wwid},
+ {"HITACHI ", "DF500 ", MULTIBUS, &get_evpd_wwid},
+ {"HITACHI ", "DF600 ", MULTIBUS, &get_evpd_wwid},
+ {"IBM ", "ProFibre 4000R ", MULTIBUS, &get_evpd_wwid},
+ {"SGI ", "TP9100 ", MULTIBUS, &get_evpd_wwid},
+ {"SGI ", "TP9300 ", MULTIBUS, &get_evpd_wwid},
+ {"SGI ", "TP9400 ", MULTIBUS, &get_evpd_wwid},
+ {"SGI ", "TP9500 ", MULTIBUS, &get_evpd_wwid},
+ {NULL, NULL, 0, NULL},
+ };
+ for (i = 0; wlist[i].vendor; i++) {
+ if (strncmp(mypath->vendor_id, wlist[i].vendor, 8) == 0 &&
+ strncmp(mypath->product_id, wlist[i].product, 16) == 0) {
+ wlist[i].getuid(fd, mypath->wwid);
+ mypath->iopolicy = wlist[i].iopolicy;
+ return 0;
+ }
+ }
return 1;
}
struct sysfs_directory * sdir;
struct sysfs_directory * devp;
struct sysfs_link * linkp;
+ char refwwid[WWID_SIZE];
+ char empty_buff[WWID_SIZE];
char buff[FILE_NAME_SIZE];
+ char path[FILE_NAME_SIZE];
+ struct path curpath;
- char block_path[FILE_NAME_SIZE];
+ /* if called from hotplug, only consider the paths that relate to */
+ /* to the device pointed by conf.hotplugdev */
+ memset(empty_buff, 0, WWID_SIZE);
+ memset(refwwid, 0, WWID_SIZE);
+ if (strncmp("/devices", conf->hotplugdev, 8) == 0) {
+ sprintf(buff, "%s%s/block",
+ conf->sysfs_path, conf->hotplugdev);
+ memset(conf->hotplugdev, 0, FILE_NAME_SIZE);
+ readlink(buff, conf->hotplugdev, FILE_NAME_SIZE);
+ basename(conf->hotplugdev, buff);
+ sprintf(curpath.sg_dev, "/dev/%s", buff);
+
+ if ((sg_fd = open(curpath.sg_dev, O_RDONLY)) < 0)
+ exit(1);
+
+ get_lun_strings(sg_fd, &curpath);
+ get_unique_id(sg_fd, &curpath);
+ strcpy(refwwid, curpath.wwid);
+ memset(&curpath, 0, sizeof(path));
+ }
- sprintf(block_path, "%s/block", conf->sysfs_path);
- sdir = sysfs_open_directory(block_path);
+ sprintf(path, "%s/block", conf->sysfs_path);
+ sdir = sysfs_open_directory(path);
sysfs_read_directory(sdir);
+
dlist_for_each_data(sdir->subdirs, devp, struct sysfs_directory) {
if (blacklist(devp->name))
continue;
+
sysfs_read_directory(devp);
+
if(devp->links == NULL)
continue;
+
dlist_for_each_data(devp->links, linkp, struct sysfs_link) {
if (!strncmp(linkp->name, "device", 6))
break;
}
+
if (linkp == NULL) {
continue;
}
basename(devp->path, buff);
- sprintf(all_paths[k].sg_dev, "/dev/%s", buff);
- strcpy(all_paths[k].dev, all_paths[k].sg_dev);
- if ((sg_fd = open(all_paths[k].sg_dev, O_RDONLY)) < 0) {
+ sprintf(curpath.sg_dev, "/dev/%s", buff);
+
+ if ((sg_fd = open(curpath.sg_dev, O_RDONLY)) < 0) {
if (conf->verbose)
- fprintf(stderr, "can't open %s. mknod ?",
- all_paths[k].sg_dev);
+ fprintf(stderr, "can't open %s\n",
+ curpath.sg_dev);
continue;
}
- get_lun_strings(sg_fd, &all_paths[k]);
- get_unique_id(sg_fd, &all_paths[k]);
- all_paths[k].state = do_tur(sg_fd);
+
+ get_lun_strings(sg_fd, &curpath);
+ get_unique_id(sg_fd, &curpath);
+
+ if (memcmp(empty_buff, refwwid, WWID_SIZE) != 0 &&
+ strncmp(curpath.wwid, refwwid, WWID_SIZE) != 0) {
+ memset(&curpath, 0, sizeof(path));
+ continue;
+ }
+
+ strcpy(all_paths[k].sg_dev, curpath.sg_dev);
+ strcpy(all_paths[k].dev, curpath.sg_dev);
+ strcpy(all_paths[k].wwid, curpath.wwid);
+ strcpy(all_paths[k].vendor_id, curpath.vendor_id);
+ strcpy(all_paths[k].product_id, curpath.product_id);
+ all_paths[k].iopolicy = curpath.iopolicy;
+
+ /* done with curpath, zero for reuse */
+ memset(&curpath, 0, sizeof(path));
+
close(sg_fd);
basename(linkp->target, buff);
sscanf(buff, "%i:%i:%i:%i",
k++;
}
sysfs_close_directory(sdir);
-
return 0;
}
}
get_lun_strings(sg_fd, &all_paths[k]);
get_unique_id(sg_fd, &all_paths[k]);
- all_paths[k].state = do_tur(sg_fd);
if (0 > ioctl(sg_fd, SG_GET_SCSI_ID, &(all_paths[k].sg_id)))
printf("device %s failed on sg ioctl, skip\n",
file_name);
buff[0] = 'a' + (char) k;
buff[1] = '\0';
strcat(fname, buff);
- } else if (k <= 255) { /* assumes sequence goes x,y,z,aa,ab,ac etc */
+ } else if (k <= 255) {
+ /* assumes sequence goes x,y,z,aa,ab,ac etc */
big = k / 26;
little = k - (26 * big);
big = big - 1;
all_paths[k].sg_id.host_no,
all_paths[k].sg_id.channel,
all_paths[k].sg_id.scsi_id, all_paths[k].sg_id.lun);
- printf("%s ", all_paths[k].sg_dev);
- printf("op:%i ", all_paths[k].state);
+ if(0 != strcmp(all_paths[k].sg_dev, all_paths[k].dev))
+ printf("%s ", all_paths[k].sg_dev);
printf("%s ", all_paths[k].dev);
printf("[%.16s]\n", all_paths[k].product_id);
}
}
}
+static long
+get_disk_size (struct env * conf, char * dev) {
+ long size;
+ int fd;
+ char attr_path[FILE_NAME_SIZE];
+ char buff[FILE_NAME_SIZE];
+ char basedev[FILE_NAME_SIZE];
+
+ if(conf->with_sysfs) {
+ basename(dev, basedev);
+ sprintf(attr_path, "%s/block/%s/size",
+ conf->sysfs_path, basedev);
+ if (0 > sysfs_read_attribute_value(attr_path, buff,
+ FILE_NAME_SIZE * sizeof(char)))
+ return -1;
+ size = atoi(buff);
+ return size;
+ } else {
+ if ((fd = open(dev, O_RDONLY)) < 0)
+ return -1;
+ if(!ioctl(fd, BLKGETSIZE, &size))
+ return size;
+ }
+ return -1;
+}
+
static int
coalesce_paths(struct env * conf, struct multipath * mp,
struct path * all_paths)
memset(empty_buff, 0, WWID_SIZE);
for (k = 0; k < conf->max_devs - 1; k++) {
- /* skip this path if no unique id has been found */
+ /* skip this path for some reason */
+
+ /* 1. if path has no unique id */
if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
continue;
- np = 0;
+ /* 2. mp with this uid already instanciated */
for (i = 0; i <= nmp; i++) {
if (0 == strcmp(mp[i].wwid, all_paths[k].wwid))
already_done = 1;
}
-
if (already_done) {
already_done = 0;
continue;
}
+ /* at this point, we know we really got a new mp */
+ np = 0;
nmp++;
strcpy(mp[nmp].wwid, all_paths[k].wwid);
PINDEX(nmp,np) = k;
+ if (mp[nmp].size == 0)
+ mp[nmp].size = get_disk_size(conf, all_paths[k].dev);
+
for (i = k + 1; i < conf->max_devs; i++) {
if (0 == strcmp(all_paths[k].wwid, all_paths[i].wwid)) {
np++;
return nmp;
}
-static long
-get_disk_size (struct env * conf, char * dev) {
- long size;
- int fd;
- char attr_path[FILE_NAME_SIZE];
- char buff[FILE_NAME_SIZE];
- char basedev[FILE_NAME_SIZE];
-
- if(conf->with_sysfs) {
- basename(dev, basedev);
- sprintf(attr_path, "%s/block/%s/size",
- conf->sysfs_path, basedev);
- if (0 > sysfs_read_attribute_value(attr_path, buff,
- FILE_NAME_SIZE * sizeof(char)))
- return -1;
- size = atoi(buff);
- return size;
- } else {
- if ((fd = open(dev, O_RDONLY)) < 0)
- return -1;
- if(!ioctl(fd, BLKGETSIZE, &size))
- return size;
- }
- return -1;
-}
-
static int
make_dm_node(char * str)
{
}
-/* future use ?
static int
-del_map(char * str) {
+dm_simplecmd(int task, const char *name) {
+ int r = 0;
struct dm_task *dmt;
- if (!(dmt = dm_task_create(DM_DEVICE_REMOVE)))
+ if (!(dmt = dm_task_create(task)))
return 0;
- if (!dm_task_set_name(dmt, str))
- goto delout;
- if (!dm_task_run(dmt))
- goto delout;
- printf("Deleted device map : %s\n", str);
+ if (!dm_task_set_name(dmt, name))
+ goto out;
+
+ r = dm_task_run(dmt);
+
+ out:
+ dm_task_destroy(dmt);
+ return r;
+}
+
+static int
+dm_addmap(int task, const char *name, const char *params, long size) {
+ struct dm_task *dmt;
+
+ if (!(dmt = dm_task_create(task)))
+ return 0;
+
+ if (!dm_task_set_name(dmt, name))
+ goto addout;
+
+ if (!dm_task_add_target(dmt, 0, size, DM_TARGET, params))
+ goto addout;
+
+ if (!dm_task_run(dmt))
+ goto addout;
- delout:
+ addout:
dm_task_destroy(dmt);
return 1;
}
-*/
static int
-add_map(struct env * conf, struct path * all_paths,
+setup_map(struct env * conf, struct path * all_paths,
struct multipath * mp, int index, int op)
{
char params[255];
char * params_p;
- struct dm_task *dmt;
int i, np;
- long size = -1;
/* defaults for multipath target */
- int dm_nr_path_args = 2;
- int dm_path_test_int = 10;
+ int dm_pg_prio = 1;
char * dm_ps_name = "round-robin";
- int dm_ps_nr_args = 2;
- int dm_path_failback_int = 10;
- int dm_path_nr_fail = 2;
- int dm_ps_prio = 1;
- int dm_ps_min_io = 2;
-
+ int dm_ps_nr_args = 0;
- if (!(dmt = dm_task_create(op)))
- return 0;
-
- if (!dm_task_set_name(dmt, mp[index].wwid))
- goto addout;
params_p = ¶ms[0];
np = 0;
for (i=0; i<=mp[index].npaths; i++) {
- if ((1 == all_paths[PINDEX(index,i)].state) &&
- (0 == all_paths[PINDEX(index,i)].sg_id.scsi_type))
+ if (0 == all_paths[PINDEX(index,i)].sg_id.scsi_type)
np++;
}
- if (np == 0)
- goto addout;
- /* temporarily disable creation of single path maps */
- /* Sistina should modify the target limits */
- if (np < 2)
- goto addout;
- params_p += sprintf(params_p, "%i %i %i %s %i",
- np, dm_nr_path_args, dm_path_test_int,
- dm_ps_name, dm_ps_nr_args);
-
- for (i=0; i<=mp[index].npaths; i++) {
- if (( 0 == all_paths[PINDEX(index,i)].state) ||
- (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type))
- continue;
- if (size < 0)
- size = get_disk_size(conf, all_paths[PINDEX(index,0)].dev);
- params_p += sprintf(params_p, " %s %i %i %i %i",
- all_paths[PINDEX(index,i)].dev,
- dm_path_failback_int, dm_path_nr_fail,
- dm_ps_prio, dm_ps_min_io);
+ if (np < 1)
+ return 0;
+
+ params_p += sprintf(params_p, "%i", conf->dm_path_test_int);
+
+ if (all_paths[PINDEX(index,0)].iopolicy == MULTIBUS &&
+ !conf->forcedfailover ) {
+ params_p += sprintf(params_p, " %i %s %i %i",
+ dm_pg_prio, dm_ps_name, np, dm_ps_nr_args);
+
+ for (i=0; i<=mp[index].npaths; i++) {
+ if (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type)
+ continue;
+ params_p += sprintf(params_p, " %s",
+ all_paths[PINDEX(index,i)].dev);
+ }
}
- if (size < 0)
- goto addout;
+ if (all_paths[PINDEX(index,0)].iopolicy == FAILOVER ||
+ conf->forcedfailover) {
+ for (i=0; i<=mp[index].npaths; i++) {
+ if (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type)
+ continue;
+ params_p += sprintf(params_p, " %i %s ",
+ dm_pg_prio, dm_ps_name);
+ params_p += sprintf(params_p, "1 %i",
+ dm_ps_nr_args);
+ params_p += sprintf(params_p, " %s",
+ all_paths[PINDEX(index,i)].dev);
+ }
+ }
+
+ if (mp[index].size < 0)
+ return 0;
if (!conf->quiet) {
if (op == DM_DEVICE_RELOAD)
- printf("U|");
+ printf("U:");
if (op == DM_DEVICE_CREATE)
- printf("N|");
- printf("%s : 0 %li %s %s\n",
- mp[index].wwid, size, DM_TARGET, params);
+ printf("N:");
+ printf("%s:0 %li %s %s\n",
+ mp[index].wwid, mp[index].size, DM_TARGET, params);
}
- if (!dm_task_add_target(dmt, 0, size, DM_TARGET, params))
- goto addout;
+ if (op == DM_DEVICE_RELOAD)
+ dm_simplecmd(DM_DEVICE_SUSPEND, mp[index].wwid);
- if (!dm_task_run(dmt))
- goto addout;
+ dm_addmap(op, mp[index].wwid, params, mp[index].size);
+ if (op == DM_DEVICE_RELOAD)
+ dm_simplecmd(DM_DEVICE_RESUME, mp[index].wwid);
make_dm_node(mp[index].wwid);
-
- addout:
- dm_task_destroy(dmt);
- return 1;
}
-/*
-static int
-get_table(const char * str)
-{
- int r = 0;
- struct dm_task *dmt;
- void *next = NULL;
- uint64_t start, length;
- char *target_type = NULL;
- char *params;
-
- if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
- return 0;
-
- if (!dm_task_set_name(dmt, str))
- goto out;
-
- if (!dm_task_run(dmt))
- goto out;
-
- do {
- next = dm_get_next_target(dmt, next, &start, &length,
- &target_type, ¶ms);
- if (target_type) {
- printf("%" PRIu64 " %" PRIu64 " %s %s\n",
- start, length, target_type, params);
- }
- } while (next);
-
- r = 1;
-
- out:
- dm_task_destroy(dmt);
- return r;
-
-}
-*/
-
static int
map_present(char * str)
{
usage(char * progname)
{
fprintf(stderr, VERSION_STRING);
- fprintf(stderr, "Usage: %s [-v|-q] [-d] [-m max_devs]\n", progname);
- fprintf(stderr, "\t-v\t\tverbose, print all paths and multipaths\n");
- fprintf(stderr, "\t-q\t\tquiet, no output at all\n");
+ fprintf(stderr, "Usage: %s [-v|-q] [-d] [-i int] [-m max_devs]\n",
+ progname);
fprintf(stderr, "\t-d\t\tdry run, do not create or update devmaps\n");
+ fprintf(stderr, "\t-f\t\tforce maps to failover mode (1 path/pg)\n");
+ fprintf(stderr, "\t-i\t\tmultipath target param : polling interval\n");
fprintf(stderr, "\t-m max_devs\tscan {max_devs} devices at most\n");
+ fprintf(stderr, "\t-q\t\tquiet, no output at all\n");
+ fprintf(stderr, "\t-v\t\tverbose, print all paths and multipaths\n");
exit(1);
}
-static int
-filepresent(char * run) {
- struct stat buf;
-
- if(!stat(run, &buf))
- return 1;
- return 0;
-}
-
int
main(int argc, char *argv[])
{
- char * run = "/var/run/multipath.run";
- char * resched = "/var/run/multipath.reschedule";
struct multipath * mp;
struct path * all_paths;
struct scsi_dev * all_scsi_ids;
conf.verbose = 0; /* 1 == Print all_paths and mp */
conf.quiet = 0; /* 1 == Do not even print devmaps */
conf.with_sysfs = 0; /* Default to compat / suboptimal behaviour */
+ conf.dm_path_test_int = 10;
/* kindly provided by libsysfs */
if (0 == sysfs_get_mnt_path(conf.sysfs_path, FILE_NAME_SIZE))
conf.quiet = 1;
} else if (0 == strcmp("-d", argv[i]))
conf.dry_run = 1;
+ else if (0 == strcmp("-f", argv[i]))
+ conf.forcedfailover = 1;
+ else if (0 == strcmp("-i", argv[i]))
+ conf.dm_path_test_int = atoi(argv[++i]);
+ else if (0 == strcmp("scsi", argv[i]))
+ strcpy(conf.hotplugdev, argv[++i]);
else if (*argv[i] == '-') {
fprintf(stderr, "Unknown switch: %s\n", argv[i]);
usage(argv[0]);
}
- if (filepresent(run)) {
- if (conf.verbose) {
- fprintf(stderr, "Already running.\n");
- fprintf(stderr, "If you know what you do, please ");
- fprintf(stderr, "remove %s\n", run);
- }
- /* leave a trace that we were called while already running */
- open(resched, O_CREAT);
- return 1;
- }
-
/* dynamic allocations */
mp = malloc(conf.max_devs * sizeof(struct multipath));
all_paths = malloc(conf.max_devs * sizeof(struct path));
all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
- if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL) {
- unlink(run);
- exit(1);
- }
-start:
- if(!open(run, O_CREAT))
+ if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL)
exit(1);
if (!conf.with_sysfs) {
fprintf(stdout, "\n");
}
- if (conf.dry_run) {
- unlink(run);
+ if (conf.dry_run)
exit(0);
- }
for (k=0; k<=nmp; k++) {
if (map_present(mp[k].wwid)) {
- add_map(&conf, all_paths, mp, k, DM_DEVICE_RELOAD);
+ setup_map(&conf, all_paths, mp, k, DM_DEVICE_RELOAD);
} else {
- add_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
+ setup_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
}
}
- unlink(run);
- /* start again if we were ask to during this process run */
- /* ie. do not loose an event-asked run */
- if (filepresent(resched)) {
- unlink(resched);
- goto start;
- }
+ /* free allocs */
+ free(mp);
+ free(all_paths);
+ free(all_scsi_ids);
+
exit(0);
}
~ianmdlvl / elogind.git / blobdiff