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-rw-r--r--extras/multipath/ChangeLog14
-rw-r--r--extras/multipath/main.c204
-rw-r--r--extras/multipath/main.h8
-rw-r--r--extras/multipath/unused.c (renamed from extras/multipath/unsused.c)26
4 files changed, 150 insertions, 102 deletions
diff --git a/extras/multipath/ChangeLog b/extras/multipath/ChangeLog
index f31fbf41dc..dc29400e0e 100644
--- a/extras/multipath/ChangeLog
+++ b/extras/multipath/ChangeLog
@@ -1,3 +1,17 @@
+2003-12-22 multipath-010
+ * don't print .sg_dev if equal to .dev (2.6) in print_path()
+ * since the kernel code handles defective paths, remove all
+ code to cope with them :
+ * move do_tur() to unused.c
+ * remove .state from path struct
+ * remove .state settings & conditionals
+ * add a cmdline switch to force maps to failover mode,
+ ie 1 path per priority group
+ * add default policies to the whitelist array (spread io ==
+ MULTIBUS / io forced to 1 path == FAILOVER)
+ * move get_disk_size() call out of add_map() to coalesce()
+ * comment tricky coalesce() fn
+ * bogus unsused.c file renamed to unused.c
2003-12-20 multipath-010
* big ChangeLog update
* start to give a little control over target params :
diff --git a/extras/multipath/main.c b/extras/multipath/main.c
index 39b4a9fa93..c57cd4fe7e 100644
--- a/extras/multipath/main.c
+++ b/extras/multipath/main.c
@@ -82,32 +82,6 @@ do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
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)
{
@@ -183,32 +157,34 @@ get_unique_id(int fd, struct path * mypath)
static struct {
char * vendor;
char * product;
+ int iopolicy;
int (*getuid) (int fd, char * wwid);
} wlist[] = {
- {"COMPAQ ", "HSV110 (C)COMPAQ", &get_evpd_wwid},
- {"COMPAQ ", "MSA1000 ", &get_evpd_wwid},
- {"COMPAQ ", "MSA1000 VOLUME ", &get_evpd_wwid},
- {"DEC ", "HSG80 ", &get_evpd_wwid},
- {"HP ", "HSV100 ", &get_evpd_wwid},
- {"HP ", "A6189A ", &get_evpd_wwid},
- {"HP ", "OPEN- ", &get_evpd_wwid},
- {"DDN ", "SAN DataDirector", &get_evpd_wwid},
- {"FSC ", "CentricStor ", &get_evpd_wwid},
- {"HITACHI ", "DF400 ", &get_evpd_wwid},
- {"HITACHI ", "DF500 ", &get_evpd_wwid},
- {"HITACHI ", "DF600 ", &get_evpd_wwid},
- {"IBM ", "ProFibre 4000R ", &get_evpd_wwid},
- {"SGI ", "TP9100 ", &get_evpd_wwid},
- {"SGI ", "TP9300 ", &get_evpd_wwid},
- {"SGI ", "TP9400 ", &get_evpd_wwid},
- {"SGI ", "TP9500 ", &get_evpd_wwid},
- {NULL, NULL, NULL},
+ {"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;
}
}
@@ -264,7 +240,7 @@ get_all_paths_sysfs(struct env * conf, struct path * all_paths)
char path[FILE_NAME_SIZE];
struct path curpath;
- /* if called from udev, only consider the paths that relate to */
+ /* 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);
@@ -331,8 +307,11 @@ get_all_paths_sysfs(struct env * conf, struct path * all_paths)
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));
- all_paths[k].state = do_tur(sg_fd);
+
close(sg_fd);
basename(linkp->target, buff);
sscanf(buff, "%i:%i:%i:%i",
@@ -367,7 +346,6 @@ get_all_paths_nosysfs(struct env * conf, struct path * all_paths,
}
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);
@@ -406,7 +384,8 @@ get_all_scsi_ids(struct env * conf, struct scsi_dev * all_scsi_ids)
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;
@@ -463,8 +442,8 @@ print_path(struct path * all_paths, int k, int style)
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);
}
@@ -495,6 +474,32 @@ print_all_mp(struct path * all_paths, struct multipath * mp, int 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
coalesce_paths(struct env * conf, struct multipath * mp,
struct path * all_paths)
@@ -507,25 +512,31 @@ coalesce_paths(struct env * conf, struct multipath * mp,
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++;
@@ -537,32 +548,6 @@ coalesce_paths(struct env * conf, struct multipath * mp,
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)
{
@@ -611,7 +596,6 @@ add_map(struct env * conf, struct path * all_paths,
char * params_p;
struct dm_task *dmt;
int i, np;
- long size = -1;
/* defaults for multipath target */
int dm_pg_prio = 1;
@@ -627,8 +611,7 @@ add_map(struct env * conf, struct path * all_paths,
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)
@@ -637,33 +620,48 @@ add_map(struct env * conf, struct path * all_paths,
if (np < 1)
goto addout;
- params_p += sprintf(params_p, "%i %i %s %i %i",
- conf->dm_path_test_int, 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)].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",
- all_paths[PINDEX(index,i)].dev);
+ 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 (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 (size < 0)
+ if (mp[index].size < 0)
goto addout;
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))
+ if (!dm_task_add_target(dmt, 0, mp[index].size, DM_TARGET, params))
goto addout;
if (!dm_task_run(dmt))
@@ -714,8 +712,10 @@ static void
usage(char * progname)
{
fprintf(stderr, VERSION_STRING);
- fprintf(stderr, "Usage: %s [-v|-q] [-d] [-i int] [-m max_devs]\n", progname);
+ 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");
@@ -759,6 +759,8 @@ main(int argc, char *argv[])
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]))
diff --git a/extras/multipath/main.h b/extras/multipath/main.h
index 0c5620ff74..3941c32e7c 100644
--- a/extras/multipath/main.h
+++ b/extras/multipath/main.h
@@ -48,6 +48,10 @@
#define BLKGETSIZE _IO(0x12,96)
#define DM_TARGET "multipath"
+/* Storage controlers cpabilities */
+#define FAILOVER 0
+#define MULTIBUS 1
+
#define PINDEX(x,y) mp[(x)].pindex[(y)]
/* global types */
@@ -80,16 +84,17 @@ struct path {
char sg_dev[FILE_NAME_SIZE];
struct scsi_idlun scsi_id;
struct sg_id sg_id;
- int state;
char wwid[WWID_SIZE];
char vendor_id[8];
char product_id[16];
char rev[4];
+ int iopolicy;
};
struct multipath {
char wwid[WWID_SIZE];
int npaths;
+ long size;
int pindex[MAX_MP_PATHS];
};
@@ -98,6 +103,7 @@ struct env {
int verbose;
int quiet;
int dry_run;
+ int forcedfailover;
int with_sysfs;
int dm_path_test_int;
char sysfs_path[FILE_NAME_SIZE];
diff --git a/extras/multipath/unsused.c b/extras/multipath/unused.c
index ecdd695ac8..33b3e859d1 100644
--- a/extras/multipath/unsused.c
+++ b/extras/multipath/unused.c
@@ -1,4 +1,30 @@
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 int
del_map(char * str) {
struct dm_task *dmt;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 05:27:46 +0000