Customers have been asking if multipath can make it easier to see how various
paths in your multipath device are connected. To help with this I've added
5 new path wildcards
%N host WWNN
%n target WWNN
%R host WWPN
%r target WWPN
%a host adapter
Signed-off-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx>
---
libmultipath/print.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 94 insertions(+), 1 deletion(-)
diff --git a/libmultipath/print.c b/libmultipath/print.c
index 3c526c2..383eae4 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -10,6 +10,7 @@
#include <unistd.h>
#include <string.h>
#include <errno.h>
+#include <libudev.h>
#include "checkers.h"
#include "vector.h"
@@ -44,7 +45,7 @@
* information printing helpers
*/
static int
-snprint_str (char * buff, size_t len, char * str)
+snprint_str (char * buff, size_t len, const char * str)
{
return snprintf(buff, len, "%s", str);
}
@@ -436,6 +437,93 @@ snprint_path_mpp (char * buff, size_t len, struct path * pp)
}
static int
+snprint_host_attr (char * buff, size_t len, struct path * pp, char *attr)
+{
+ struct udev_device *host_dev = NULL;
+ char host_id[32];
+ const char *value = NULL;
+ int ret;
+
+ if (pp->sg_id.proto_id != SCSI_PROTOCOL_FCP)
+ return snprintf(buff, len, "[undef]");
+ sprintf(host_id, "host%d", pp->sg_id.host_no);
+ host_dev = udev_device_new_from_subsystem_sysname(conf->udev, "fc_host",
+ host_id);
+ if (!host_dev) {
+ condlog(1, "%s: No fc_host device for '%s'", pp->dev, host_id);
+ goto out;
+ }
+ value = udev_device_get_sysattr_value(host_dev, attr);
+ if (value)
+ ret = snprint_str(buff, len, value);
+ udev_device_unref(host_dev);
+out:
+ if (!value)
+ ret = snprintf(buff, len, "[unknown]");
+ return ret;
+}
+
+static int
+snprint_host_wwnn (char * buff, size_t len, struct path * pp)
+{
+ return snprint_host_attr(buff, len, pp, "node_name");
+}
+
+static int
+snprint_host_wwpn (char * buff, size_t len, struct path * pp)
+{
+ return snprint_host_attr(buff, len, pp, "port_name");
+}
+
+static int
+snprint_tgt_wwpn (char * buff, size_t len, struct path * pp)
+{
+ struct udev_device *rport_dev = NULL;
+ char rport_id[32];
+ const char *value = NULL;
+ int ret;
+
+ if (pp->sg_id.proto_id != SCSI_PROTOCOL_FCP)
+ return snprintf(buff, len, "[undef]");
+ sprintf(rport_id, "rport-%d:%d-%d",
+ pp->sg_id.host_no, pp->sg_id.channel, pp->sg_id.transport_id);
+ rport_dev = udev_device_new_from_subsystem_sysname(conf->udev,
+ "fc_remote_ports", rport_id);
+ if (!rport_dev) {
+ condlog(1, "%s: No fc_remote_port device for '%s'", pp->dev,
+ rport_id);
+ goto out;
+ }
+ value = udev_device_get_sysattr_value(rport_dev, "port_name");
+ if (value)
+ ret = snprint_str(buff, len, value);
+ udev_device_unref(rport_dev);
+out:
+ if (!value)
+ ret = snprintf(buff, len, "[unknown]");
+ return ret;
+}
+
+
+static int
+snprint_tgt_wwnn (char * buff, size_t len, struct path * pp)
+{
+ if (pp->tgt_node_name[0] == '\0')
+ return snprintf(buff, len, "[undef]");
+ return snprint_str(buff, len, pp->tgt_node_name);
+}
+
+static int
+snprint_host_adapter (char * buff, size_t len, struct path * pp)
+{
+ char adapter[SLOT_NAME_SIZE];
+
+ if (sysfs_get_host_adapter_name(pp, adapter))
+ return snprintf(buff, len, "[undef]");
+ return snprint_str(buff, len, adapter);
+}
+
+static int
snprint_path_checker (char * buff, size_t len, struct path * pp)
{
struct checker * c = &pp->checker;
@@ -479,6 +567,11 @@ struct path_data pd[] = {
{'S', "size", 0, snprint_path_size},
{'z', "serial", 0, snprint_path_serial},
{'m', "multipath", 0, snprint_path_mpp},
+ {'N', "host WWNN", 0, snprint_host_wwnn},
+ {'n', "target WWNN", 0, snprint_tgt_wwnn},
+ {'R', "host WWPN", 0, snprint_host_wwpn},
+ {'r', "target WWPN", 0, snprint_tgt_wwpn},
+ {'a', "host adapter", 0, snprint_host_adapter},
{0, NULL, 0 , NULL}
};
--
1.8.3.1
--
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