[Xen-changelog] [xen-3.4-testing] hotplug: ignore xenstore-read error

["Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1266408929 0
# Node ID 512e596e27328e775f4c53b459b4186ba3c18c47
# Parent  534fc077443902a7992d9af7d3f35ad17728842f
hotplug: ignore xenstore-read error

The failure to read "backend/tap/<domid>/*" in the xenstore is a usual
case since the domain is gone after xenstore-ls command is executed.
The error should be ignored.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
xen-unstable changeset:   20947:4a4caf3c052d
xen-unstable date:        Tue Feb 16 09:28:39 2010 +0000
---
 tools/hotplug/Linux/blktap |    4 ++--
 tools/hotplug/Linux/block  |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff -r 534fc0774439 -r 512e596e2732 tools/hotplug/Linux/blktap
--- a/tools/hotplug/Linux/blktap        Wed Feb 10 09:30:55 2010 +0000
+++ b/tools/hotplug/Linux/blktap        Wed Feb 17 12:15:29 2010 +0000
@@ -23,7 +23,7 @@ check_blktap_sharing()
     do
         for dev in $(xenstore-list "$base_path/$dom")
         do
-            params=$(xenstore_read "$base_path/$dom/$dev/params" | cut -d: -f2)
+            params=$(xenstore_read_default "$base_path/$dom/$dev/params" "" | 
cut -d: -f2)
             if [ "$file" = "$params" ]
             then
 
@@ -35,7 +35,7 @@ check_blktap_sharing()
                         return
                     fi
                 else 
-                    local m=$(xenstore_read "$base_path/$dom/$dev/mode")
+                    local m=$(xenstore_read_default 
"$base_path/$dom/$dev/mode" "")
                     m=$(canonicalise_mode "$m")
 
                     if [ "$m" = 'w' ] 
diff -r 534fc0774439 -r 512e596e2732 tools/hotplug/Linux/block
--- a/tools/hotplug/Linux/block Wed Feb 10 09:30:55 2010 +0000
+++ b/tools/hotplug/Linux/block Wed Feb 17 12:15:29 2010 +0000
@@ -80,7 +80,7 @@ check_sharing()
             return
           fi
         else
-          local m=$(xenstore_read "$base_path/$dom/$dev/mode")
+          local m=$(xenstore_read_default "$base_path/$dom/$dev/mode" "")
           m=$(canonicalise_mode "$m")
 
           if [ "$m" = 'w' ]

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