Handle udev events on SCSI vports

[brianatpurestorage]

If SCSI vports are used by adding them via NPIV by using the vport_create file for an FC port:

 # pwd
 # /sys/class/fc_host/host6
 # echo '1111222233334444:5555666677778888' > vport_create

This will create a virtual host at a higher index number than the existing FC hosts. You can assign LUNs to these hosts just as you would to the actual FC hosts. Assigning LUNs will result in a unit attention of reported LUNs data has changed, which will have this path from udev as the devpath.

/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host6/vport-6:0-0/ host10/rport-10:0-2/target10:0:0/10:0:0:1

The existing scan-scsi-target will find the first instance of '/host' and cause a rescan on host6 which is not where the ACL has actually changed. The rescan should happen on the virtual host, host10 to get the expected result.

[lkx007]

您好，您的来信已收到，我将会尽快给您回复，谢谢~~

[brianatpurestorage]

diff --git a/tools/udev/scan-scsi-target.c b/tools/udev/scan-scsi-target.c
index 84db53d..faaefc7 100644
--- a/tools/udev/scan-scsi-target.c
+++ b/tools/udev/scan-scsi-target.c
@@ -131,6 +131,9 @@ int main(int argc, char **argv) {
      */
     if ((host_str = strstr(devpath, "/host")) == NULL)
         invalid(argv, devpath);
+    if (strstr(devpath, "/vport"))
+        if ((host_str = strstr(host_str + 1, "/host")) == NULL)
+            invalid(argv, devpath);
     host_pos = strlen(devpath) - strlen(host_str);

     if ((host_next_str = strstr(&devpath[host_pos + 1], "/")) == NULL)

[e-milne]

Yes this looks fine.