LU-515 canonicalize the devices names

Perform a readlink on the device name if path is /dev/disk/by-id...
See Oracle bug 24487.

Change-Id: I964b224d764677d60064901f4238ae77b9cfb5ea
Signed-off-by: Wally Wang <wang@cray.com>
Signed-off-by: Niu Yawei <niu@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/1120
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Li Wei <liwei@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre-iokit/sgpdd-survey/sgpdd-survey b/lustre-iokit/sgpdd-survey/sgpdd-survey
index 6d99457..d9ad8ae 100755 (executable)
--- a/lustre-iokit/sgpdd-survey/sgpdd-survey
+++ b/lustre-iokit/sgpdd-survey/sgpdd-survey
@@ -62,7 +62,11 @@ if [ "$scsidevs" ]; then
     fi
 
     for d in $scsidevs; do
     fi
 
     for d in $scsidevs; do

-       devs[$i]=`sg_map | awk "{if (\\\$2 == \"$d\") print \\\$1}"`
+        if [[ -L "$d" ]]; then
+            echo "Device $d specified by alias. Will 'readlink' for device name"
+            d=$(readlink -f $d)
+        fi
+        devs[$i]=`sg_map | awk "{if (\\\$2 == \"$d\") print \\\$1}"`

         if [ -z "${devs[i]}" ]; then
             echo "Can't find SG device for $d, testing for partition"
             pt=`echo $d | sed 's/[0-9]*$//'`
         if [ -z "${devs[i]}" ]; then
             echo "Can't find SG device for $d, testing for partition"
             pt=`echo $d | sed 's/[0-9]*$//'`