[PATCH v8 13/15] libxl: use libxl__xs_path_cleanup on device_destroy

[Roger Pau Monne <roger.pau@citrix.com>]

Since the hotplug script that was in charge of cleaning the backend is
no longer launched, we need to clean the backend by ourselves, so use
libxl__xs_path_cleanup instead of xs_rm.

Changes sinve v2:

 * Changed the goto construction to a do-while loop.

Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
---
 tools/libxl/libxl_device.c |   18 ++++++++++++++----
 1 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
index 13f9ecb..2f6e427 100644
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -479,16 +479,26 @@ DEFINE_DEVICES_ADD(nic)
 
 int libxl__device_destroy(libxl__gc *gc, libxl__device *dev)
 {
-    libxl_ctx *ctx = libxl__gc_owner(gc);
     char *be_path = libxl__device_backend_path(gc, dev);
     char *fe_path = libxl__device_frontend_path(gc, dev);
+    xs_transaction_t t = 0;
+    int rc = 0;
 
-    xs_rm(ctx->xsh, XBT_NULL, be_path);
-    xs_rm(ctx->xsh, XBT_NULL, fe_path);
+    do {
+        t = xs_transaction_start(CTX->xsh);
+        libxl__xs_path_cleanup(gc, t, fe_path);
+        libxl__xs_path_cleanup(gc, t, be_path);
+        rc = !xs_transaction_end(CTX->xsh, t, 0);
+    } while (rc && errno == EAGAIN);
+    if (rc) {
+        LOGE(ERROR, "unable to finish transaction");
+        goto out;
+    }
 
     libxl__device_destroy_tapdisk(gc, be_path);
 
-    return 0;
+out:
+    return rc;
 }
 
 /* Callback for device destruction */
-- 
1.7.7.5 (Apple Git-26)