[Xen-devel] [PATCH RFC 05/12] libxl: don't remove device backend path if not local

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

If the backend of a device is running on a driver domain, it should be
the driver domain itself the one to clean the backend path once the
device has been successfully disconnected.

And the opposite way, a domain different than LIBXL_TOOLSTACK_DOMID
should not try to remove the frontend paths of a device.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Cc: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 tools/libxl/libxl_device.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
index 48acc92..082bd2a 100644
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -562,6 +562,10 @@ int libxl__device_destroy(libxl__gc *gc, libxl__device 
*dev)
     const char *tapdisk_params;
     xs_transaction_t t = 0;
     int rc;
+    uint32_t domid;
+
+    rc = libxl__get_domid(gc, &domid);
+    if (rc) goto out;
 
     for (;;) {
         rc = libxl__xs_transaction_start(gc, &t);
@@ -571,8 +575,10 @@ int libxl__device_destroy(libxl__gc *gc, libxl__device 
*dev)
         rc = libxl__xs_read_checked(gc, t, tapdisk_path, &tapdisk_params);
         if (rc) goto out;
 
-        libxl__xs_path_cleanup(gc, t, fe_path);
-        libxl__xs_path_cleanup(gc, t, be_path);
+        if (domid == LIBXL_TOOLSTACK_DOMID)
+            libxl__xs_path_cleanup(gc, t, fe_path);
+        if (dev->backend_domid == domid)
+            libxl__xs_path_cleanup(gc, t, be_path);
 
         rc = libxl__xs_transaction_commit(gc, &t);
         if (!rc) break;
-- 
1.7.7.5 (Apple Git-26)


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