From: Martin Wilck <mwilck@xxxxxxxx>
With SAS expanders, SAS node names have 3 digits. libmultipath
would fail to discover the sas_end_device matching a given SCSI
target in this case. Fix it.
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
libmultipath/discovery.c | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index f3ce3f8..7878454 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -789,14 +789,28 @@ sysfs_set_session_tmo(struct multipath *mpp, struct path *pp)
static void
sysfs_set_nexus_loss_tmo(struct multipath *mpp, struct path *pp)
{
- struct udev_device *sas_dev = NULL;
- char end_dev_id[64];
+ struct udev_device *parent, *sas_dev = NULL;
+ const char *end_dev_id = NULL;
char value[11];
+ static const char ed_str[] = "end_device-";
- if (mpp->dev_loss == DEV_LOSS_TMO_UNSET)
+ if (!pp->udev || mpp->dev_loss == DEV_LOSS_TMO_UNSET)
return;
- sprintf(end_dev_id, "end_device-%d:%d",
- pp->sg_id.host_no, pp->sg_id.transport_id);
+
+ for (parent = udev_device_get_parent(pp->udev);
+ parent;
+ parent = udev_device_get_parent(parent)) {
+ const char *ed = udev_device_get_sysname(parent);
+
+ if (!strncmp(ed, ed_str, sizeof(ed_str) - 1)) {
+ end_dev_id = ed;
+ break;
+ }
+ }
+ if (!end_dev_id) {
+ condlog(1, "%s: No SAS end device", pp->dev);
+ return;
+ }
sas_dev = udev_device_new_from_subsystem_sysname(udev,
"sas_end_device", end_dev_id);
if (!sas_dev) {
--
2.29.2
--
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