[dm-devel] [PATCH 09/15] libmultipath: add code to get vendor specific vpd data
Benjamin Marzinski
bmarzins at redhat.com
Fri Jan 17 02:18:14 UTC 2020
This adds the wildcard 'g' for multipath and path formatted printing,
which returns extra data from a device's vendor specific vpd page. The
specific vendor vpd page to use, and the vendor/product id to decode it
can be set in the hwentry with vpd_vendor_pg and vpd_vendor_id. It can
be configured in the devices section of multipath.conf with the
vpd_vendor parameter. Currently, the only devices that use this are HPE
3PAR arrays, to return the Volume Name.
Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
libmultipath/config.c | 4 ++++
libmultipath/config.h | 2 ++
libmultipath/dict.c | 34 ++++++++++++++++++++++++++++++++++
libmultipath/discovery.c | 34 +++++++++++++++++++++++++++++++++-
libmultipath/hwtable.c | 2 ++
libmultipath/print.c | 27 +++++++++++++++++++++++++++
libmultipath/propsel.c | 24 ++++++++++++++++++++++++
libmultipath/propsel.h | 2 ++
libmultipath/structs.h | 9 +++++++++
multipath/multipath.conf.5 | 8 ++++++++
10 files changed, 145 insertions(+), 1 deletion(-)
diff --git a/libmultipath/config.c b/libmultipath/config.c
index 85626e96..72b8d37c 100644
--- a/libmultipath/config.c
+++ b/libmultipath/config.c
@@ -369,6 +369,8 @@ merge_hwe (struct hwentry * dst, struct hwentry * src)
merge_num(max_sectors_kb);
merge_num(ghost_delay);
merge_num(all_tg_pt);
+ merge_num(vpd_vendor_pg);
+ merge_num(vpd_vendor_id);
merge_num(san_path_err_threshold);
merge_num(san_path_err_forget_rate);
merge_num(san_path_err_recovery_time);
@@ -517,6 +519,8 @@ store_hwe (vector hwtable, struct hwentry * dhwe)
hwe->detect_prio = dhwe->detect_prio;
hwe->detect_checker = dhwe->detect_checker;
hwe->ghost_delay = dhwe->ghost_delay;
+ hwe->vpd_vendor_pg = dhwe->vpd_vendor_pg;
+ hwe->vpd_vendor_id = dhwe->vpd_vendor_id;
if (dhwe->bl_product && !(hwe->bl_product = set_param_str(dhwe->bl_product)))
goto out;
diff --git a/libmultipath/config.h b/libmultipath/config.h
index e69aa07c..589146de 100644
--- a/libmultipath/config.h
+++ b/libmultipath/config.h
@@ -87,6 +87,8 @@ struct hwentry {
int max_sectors_kb;
int ghost_delay;
int all_tg_pt;
+ int vpd_vendor_pg;
+ int vpd_vendor_id;
char * bl_product;
};
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 2b046e1d..d6d8b79b 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -1366,6 +1366,39 @@ def_uxsock_timeout_handler(struct config *conf, vector strvec)
return 0;
}
+static int
+hw_vpd_vendor_handler(struct config *conf, vector strvec)
+{
+ int rc = 0;
+ char *buff;
+
+ struct hwentry * hwe = VECTOR_LAST_SLOT(conf->hwtable);
+ if (!hwe)
+ return 1;
+
+ buff = set_value(strvec);
+ if (!buff)
+ return 1;
+ if (strcmp(buff, "hp3par") == 0) {
+ hwe->vpd_vendor_pg = 0xc0;
+ hwe->vpd_vendor_id = VPD_VP_HP3PAR;
+ } else
+ rc = 1;
+ FREE(buff);
+ return rc;
+}
+
+static int
+snprint_hw_vpd_vendor(struct config *conf, char * buff, int len,
+ const void * data)
+{
+ const struct hwentry * hwe = (const struct hwentry *)data;
+
+ if (hwe->vpd_vendor_pg == 0xc0 && hwe->vpd_vendor_id == VPD_VP_HP3PAR)
+ return snprintf(buff, len, "hp3par");
+ return 0;
+}
+
/*
* blacklist block handlers
*/
@@ -1806,6 +1839,7 @@ init_keywords(vector keywords)
install_keyword("max_sectors_kb", &hw_max_sectors_kb_handler, &snprint_hw_max_sectors_kb);
install_keyword("ghost_delay", &hw_ghost_delay_handler, &snprint_hw_ghost_delay);
install_keyword("all_tg_pt", &hw_all_tg_pt_handler, &snprint_hw_all_tg_pt);
+ install_keyword("vpd_vendor", &hw_vpd_vendor_handler, &snprint_hw_vpd_vendor);
install_sublevel_end();
install_keyword_root("overrides", &overrides_handler);
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 1d79cbae..d2773c3a 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -1103,6 +1103,30 @@ parse_vpd_pg83(const unsigned char *in, size_t in_len,
return len;
}
+static int
+parse_vpd_c0_hp3par(const unsigned char *in, size_t in_len,
+ char *out, size_t out_len)
+{
+ size_t len;
+
+ memset(out, 0x0, out_len);
+ if (in_len <= 4 || (in[4] > 3 && in_len < 44)) {
+ condlog(3, "HP/3PAR vendor specific VPD page length too short: %lu", in_len);
+ return -EINVAL;
+ }
+ if (in[4] <= 3) /* revision must be > 3 to have Vomlume Name */
+ return -ENODATA;
+ len = get_unaligned_be32(&in[40]);
+ if (len > out_len || len + 44 > in_len) {
+ condlog(3, "HP/3PAR vendor specific Volume name too long: %lu",
+ len);
+ return -EINVAL;
+ }
+ memcpy(out, &in[44], len);
+ out[out_len - 1] = '\0';
+ return len;
+}
+
static int
get_vpd_sysfs (struct udev_device *parent, int pg, char * str, int maxlen)
{
@@ -1170,7 +1194,9 @@ get_vpd_sgio (int fd, int pg, int vend_id, char * str, int maxlen)
len = (buff_len <= maxlen)? buff_len : maxlen;
memcpy (str, buff, len);
}
- } else
+ } else if (pg == 0xc0 && vend_id == VPD_VP_HP3PAR)
+ len = parse_vpd_c0_hp3par(buff, buff_len, str, maxlen);
+ else
len = -ENOSYS;
return len;
@@ -1544,6 +1570,12 @@ scsi_ioctl_pathinfo (struct path * pp, struct config *conf, int mask)
if (!(mask & DI_SERIAL))
return;
+ select_vpd_vendor_pg(conf, pp);
+ select_vpd_vendor_id(conf, pp);
+
+ if (pp->vpd_vendor_pg != 0 && get_vpd_sgio(pp->fd, pp->vpd_vendor_pg, pp->vpd_vendor_id, pp->vpd_data, sizeof(pp->vpd_data)) < 0)
+ condlog(3, "%s: failed to get extra vpd data", pp->dev);
+
parent = pp->udev;
while (parent) {
const char *subsys = udev_device_get_subsystem(parent);
diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index 16627ec5..1f27450c 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -117,6 +117,8 @@ static struct hwentry default_hw[] = {
.no_path_retry = 18,
.fast_io_fail = 10,
.dev_loss = MAX_DEV_LOSS_TMO,
+ .vpd_vendor_pg = 0xc0,
+ .vpd_vendor_id = VPD_VP_HP3PAR,
},
{
/* RA8000 / ESA12000 */
diff --git a/libmultipath/print.c b/libmultipath/print.c
index 907469ad..0aafe3cb 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -358,6 +358,23 @@ snprint_action (char * buff, size_t len, const struct multipath * mpp)
}
}
+static int
+snprint_multipath_vpd_data(char * buff, size_t len,
+ const struct multipath * mpp)
+{
+ struct pathgroup * pgp;
+ struct path * pp;
+ int i, j;
+
+ vector_foreach_slot(mpp->pg, pgp, i) {
+ vector_foreach_slot(pgp->paths, pp, j) {
+ if (strlen(pp->vpd_data))
+ return snprintf(buff, len, "%s", pp->vpd_data);
+ }
+ }
+ return 0;
+}
+
/*
* path info printing functions
*/
@@ -688,6 +705,14 @@ snprint_path_marginal(char * buff, size_t len, const struct path * pp)
return snprintf(buff, len, "normal");
}
+static int
+snprint_path_vpd_data(char * buff, size_t len, const struct path * pp)
+{
+ if (strlen(pp->vpd_data) > 0)
+ return snprintf(buff, len, "%s", pp->vpd_data);
+ return 0;
+}
+
struct multipath_data mpd[] = {
{'n', "name", 0, snprint_name},
{'w', "uuid", 0, snprint_multipath_uuid},
@@ -712,6 +737,7 @@ struct multipath_data mpd[] = {
{'p', "prod", 0, snprint_multipath_prod},
{'e', "rev", 0, snprint_multipath_rev},
{'G', "foreign", 0, snprint_multipath_foreign},
+ {'g', "vpd page data", 0, snprint_multipath_vpd_data},
{0, NULL, 0 , NULL}
};
@@ -737,6 +763,7 @@ struct path_data pd[] = {
{'r', "target WWPN", 0, snprint_tgt_wwpn},
{'a', "host adapter", 0, snprint_host_adapter},
{'G', "foreign", 0, snprint_path_foreign},
+ {'g', "vpd page data", 0, snprint_path_vpd_data},
{'0', "failures", 0, snprint_path_failures},
{'P', "protocol", 0, snprint_path_protocol},
{0, NULL, 0 , NULL}
diff --git a/libmultipath/propsel.c b/libmultipath/propsel.c
index b5b5b89f..3c99f2d4 100644
--- a/libmultipath/propsel.c
+++ b/libmultipath/propsel.c
@@ -1203,3 +1203,27 @@ out:
origin);
return 0;
}
+
+int select_vpd_vendor_pg (struct config *conf, struct path *pp)
+{
+ const char *origin;
+
+ pp_set_hwe(vpd_vendor_pg);
+ pp_set_default(vpd_vendor_pg, 0);
+out:
+ condlog(3, "%s: vpd_vendor_pg = 0x%x %s", pp->dev, pp->vpd_vendor_pg,
+ origin);
+ return 0;
+}
+
+int select_vpd_vendor_id (struct config *conf, struct path *pp)
+{
+ const char *origin;
+
+ pp_set_hwe(vpd_vendor_id);
+ pp_set_default(vpd_vendor_id, 0);
+out:
+ condlog(3, "%s: vpd_vendor_id = 0x%x %s", pp->dev, pp->vpd_vendor_id,
+ origin);
+ return 0;
+}
diff --git a/libmultipath/propsel.h b/libmultipath/propsel.h
index ddfd6262..3f6d319a 100644
--- a/libmultipath/propsel.h
+++ b/libmultipath/propsel.h
@@ -37,3 +37,5 @@ void reconcile_features_with_options(const char *id, char **features,
int* no_path_retry,
int *retain_hwhandler);
int select_all_tg_pt (struct config *conf, struct multipath * mp);
+int select_vpd_vendor_pg (struct config *conf, struct path *pp);
+int select_vpd_vendor_id (struct config *conf, struct path *pp);
diff --git a/libmultipath/structs.h b/libmultipath/structs.h
index 1c32a799..1ad5f64a 100644
--- a/libmultipath/structs.h
+++ b/libmultipath/structs.h
@@ -21,6 +21,7 @@
#define HOST_NAME_LEN 16
#define SLOT_NAME_SIZE 40
#define PRKEY_SIZE 19
+#define VPD_DATA_SIZE 128
#define SCSI_VENDOR_SIZE 9
#define SCSI_PRODUCT_SIZE 17
@@ -243,6 +244,11 @@ struct hd_geometry {
};
#endif
+/*
+ * from sg_vpd_vendor.c
+ */
+#define VPD_VP_HP3PAR 4
+
struct path {
char dev[FILE_NAME_SIZE];
char dev_t[BLK_DEV_SIZE];
@@ -255,6 +261,7 @@ struct path {
char rev[PATH_REV_SIZE];
char serial[SERIAL_SIZE];
char tgt_node_name[NODE_NAME_SIZE];
+ char vpd_data[VPD_DATA_SIZE];
unsigned long long size;
unsigned int checkint;
unsigned int tick;
@@ -287,6 +294,8 @@ struct path {
int io_err_pathfail_starttime;
int find_multipaths_timeout;
int marginal;
+ int vpd_vendor_pg;
+ int vpd_vendor_id;
/* configlet pointers */
vector hwe;
struct gen_path generic_path;
diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
index e866da23..dc103fd8 100644
--- a/multipath/multipath.conf.5
+++ b/multipath/multipath.conf.5
@@ -1472,6 +1472,14 @@ the \fIproduct\fR attribute set to the value of \fIproduct_blacklist\fR.
The user_friendly_names prefix to use for this
device type, instead of the default "mpath".
.TP
+.B vpd_vendor
+The vendor specific vpd page information, using the vpd page abbreviation.
+The vpd page abbreviation can be found by running \fIsg_vpd -e\fR. multipathd
+will use this information to gather device specific information that can be
+displayed with the \fI%g\fR wilcard for the \fImultipathd show maps format\fR
+and \fImultipathd show paths format\fR commands. Currently only the
+\fBhp3par\fR vpd page is supported.
+.TP
.B hardware_handler
The hardware handler to use for this device type.
The following hardware handler are implemented:
--
2.17.2
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