From: Richard W.M. Jones <rjones@redhat.com>
Date: Tue, 17 Mar 2015 12:51:50 +0000 (+0000)
Subject: Suppress errors to stderr and use thread-local virErrorPtr
X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=68fae1ec3de46fd9eec88fb7c1894ea7ed85ccc9;p=ocaml-libvirt.git

Suppress errors to stderr and use thread-local virErrorPtr

This allows us to capture errors that happen during virConnectOpen,
without spewing error messages on stderr.

The patch is rather large, only because we don't need to pass the
virConnectPtr argument to CHECK_ERROR/_raise_virterror any longer.
---

diff --git a/libvirt/generator.pl b/libvirt/generator.pl
index 421592b..34801ba 100755
--- a/libvirt/generator.pl
+++ b/libvirt/generator.pl
@@ -343,17 +343,13 @@ sub gen_unpack_args
     if ($_ eq "conn") {
 	"virConnectPtr conn = Connect_val (connv);"
     } elsif ($_ eq "dom") {
-	"virDomainPtr dom = Domain_val (domv);\n".
-	"  virConnectPtr conn = Connect_domv (domv);"
+	"virDomainPtr dom = Domain_val (domv);"
     } elsif ($_ eq "net") {
-	"virNetworkPtr net = Network_val (netv);\n".
-	"  virConnectPtr conn = Connect_netv (netv);"
+	"virNetworkPtr net = Network_val (netv);"
     } elsif ($_ eq "pool") {
-	"virStoragePoolPtr pool = Pool_val (poolv);\n".
-	"  virConnectPtr conn = Connect_polv (poolv);"
+	"virStoragePoolPtr pool = Pool_val (poolv);"
     } elsif ($_ eq "vol") {
-	"virStorageVolPtr vol = Volume_val (volv);\n".
-	"  virConnectPtr conn = Connect_volv (volv);"
+	"virStorageVolPtr vol = Volume_val (volv);"
     } else {
 	die "unknown short name $_"
     }
@@ -402,7 +398,7 @@ sub gen_c_code
   char *r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   rv = caml_copy_string (r);
   free (r);
@@ -415,7 +411,7 @@ sub gen_c_code
   const char *r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -426,7 +422,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_int (r));
 "
@@ -438,7 +434,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, uuid));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   /* UUIDs are byte arrays with a fixed length. */
   rv = caml_alloc_string (VIR_UUID_BUFLEN);
@@ -453,7 +449,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, uuid));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   rv = caml_copy_string (uuid);
   CAMLreturn (rv);
@@ -464,7 +460,7 @@ sub gen_c_code
   int r, b;
 
   NONBLOCKING (r = $c_name ($1, &b));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (b ? Val_true : Val_false);
 "
@@ -476,7 +472,7 @@ sub gen_c_code
   b = bv == Val_true ? 1 : 0;
 
   NONBLOCKING (r = $c_name ($1, b));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -498,7 +494,7 @@ sub gen_c_code
   }
 
   NONBLOCKING (r = $c_name (conn, ids, i));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i)
@@ -525,7 +521,7 @@ sub gen_c_code
   }
 
   NONBLOCKING (r = $c_name ($1, names, i));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -543,7 +539,7 @@ sub gen_c_code
   char *r;
 
   NONBLOCKING (r = $c_name ($1, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   rv = caml_copy_string (r);
   free (r);
@@ -555,7 +551,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, 0));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -565,7 +561,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -575,7 +571,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   /* So that we don't double-free in the finalizer: */
   " . gen_free_arg ($1) . "
@@ -589,7 +585,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, str));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -601,7 +597,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, str, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -614,7 +610,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, str));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -629,7 +625,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, str, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -645,7 +641,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, str, u));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -659,7 +655,7 @@ sub gen_c_code
   int r;
 
   NONBLOCKING (r = $c_name ($1, i));
-  CHECK_ERROR (r == -1, conn, \"$c_name\");
+  CHECK_ERROR (r == -1, \"$c_name\");
 
   CAMLreturn (Val_unit);
 "
@@ -673,7 +669,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, i));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($3) . "
 
@@ -688,7 +684,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, uuid));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -702,7 +698,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -716,7 +712,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   " . gen_pack_result ($2) . "
 
@@ -731,7 +727,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, str));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   connv = Field ($3v, 1);
   " . gen_pack_result ($2) . "
@@ -747,7 +743,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, str, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   connv = Field ($3v, 1);
   " . gen_pack_result ($2) . "
@@ -762,7 +758,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1, 0));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   connv = Field ($3v, 1);
   " . gen_pack_result ($2) . "
@@ -777,7 +773,7 @@ sub gen_c_code
   $c_ret_type r;
 
   NONBLOCKING (r = $c_name ($1));
-  CHECK_ERROR (!r, conn, \"$c_name\");
+  CHECK_ERROR (!r, \"$c_name\");
 
   connv = Field ($3v, 1);
   " . gen_pack_result ($2) . "
diff --git a/libvirt/libvirt_c.c b/libvirt/libvirt_c.c
index 6e56682..8d51944 100644
--- a/libvirt/libvirt_c.c
+++ b/libvirt/libvirt_c.c
@@ -61,7 +61,7 @@ ocaml_libvirt_connect_close (value connv)
   int r;
 
   NONBLOCKING (r = virConnectClose (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectClose");
+  CHECK_ERROR (r == -1, "virConnectClose");
 
   /* So that we don't double-free in the finalizer: */
   Connect_val (connv) = NULL;
@@ -83,7 +83,7 @@ ocaml_libvirt_connect_get_hostname (value connv)
   char *r;
 
   NONBLOCKING (r = virConnectGetHostname (conn));
-  CHECK_ERROR (!r, conn, "virConnectGetHostname");
+  CHECK_ERROR (!r, "virConnectGetHostname");
 
   rv = caml_copy_string (r);
   free (r);
@@ -104,7 +104,7 @@ ocaml_libvirt_connect_get_uri (value connv)
   char *r;
 
   NONBLOCKING (r = virConnectGetURI (conn));
-  CHECK_ERROR (!r, conn, "virConnectGetURI");
+  CHECK_ERROR (!r, "virConnectGetURI");
 
   rv = caml_copy_string (r);
   free (r);
@@ -125,7 +125,7 @@ ocaml_libvirt_connect_get_type (value connv)
   const char *r;
 
   NONBLOCKING (r = virConnectGetType (conn));
-  CHECK_ERROR (!r, conn, "virConnectGetType");
+  CHECK_ERROR (!r, "virConnectGetType");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -144,7 +144,7 @@ ocaml_libvirt_connect_num_of_domains (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfDomains (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfDomains");
+  CHECK_ERROR (r == -1, "virConnectNumOfDomains");
 
   CAMLreturn (Val_int (r));
 }
@@ -174,7 +174,7 @@ ocaml_libvirt_connect_list_domains (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListDomains (conn, ids, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListDomains");
+  CHECK_ERROR (r == -1, "virConnectListDomains");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i)
@@ -196,7 +196,7 @@ ocaml_libvirt_connect_num_of_defined_domains (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfDefinedDomains (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfDefinedDomains");
+  CHECK_ERROR (r == -1, "virConnectNumOfDefinedDomains");
 
   CAMLreturn (Val_int (r));
 }
@@ -227,7 +227,7 @@ ocaml_libvirt_connect_list_defined_domains (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListDefinedDomains (conn, names, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListDefinedDomains");
+  CHECK_ERROR (r == -1, "virConnectListDefinedDomains");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -252,7 +252,7 @@ ocaml_libvirt_connect_num_of_networks (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfNetworks (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfNetworks");
+  CHECK_ERROR (r == -1, "virConnectNumOfNetworks");
 
   CAMLreturn (Val_int (r));
 }
@@ -283,7 +283,7 @@ ocaml_libvirt_connect_list_networks (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListNetworks (conn, names, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListNetworks");
+  CHECK_ERROR (r == -1, "virConnectListNetworks");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -308,7 +308,7 @@ ocaml_libvirt_connect_num_of_defined_networks (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfDefinedNetworks (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfDefinedNetworks");
+  CHECK_ERROR (r == -1, "virConnectNumOfDefinedNetworks");
 
   CAMLreturn (Val_int (r));
 }
@@ -339,7 +339,7 @@ ocaml_libvirt_connect_list_defined_networks (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListDefinedNetworks (conn, names, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListDefinedNetworks");
+  CHECK_ERROR (r == -1, "virConnectListDefinedNetworks");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -364,7 +364,7 @@ ocaml_libvirt_connect_num_of_storage_pools (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfStoragePools (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfStoragePools");
+  CHECK_ERROR (r == -1, "virConnectNumOfStoragePools");
 
   CAMLreturn (Val_int (r));
 }
@@ -395,7 +395,7 @@ ocaml_libvirt_connect_list_storage_pools (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListStoragePools (conn, names, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListStoragePools");
+  CHECK_ERROR (r == -1, "virConnectListStoragePools");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -420,7 +420,7 @@ ocaml_libvirt_connect_num_of_defined_storage_pools (value connv)
   int r;
 
   NONBLOCKING (r = virConnectNumOfDefinedStoragePools (conn));
-  CHECK_ERROR (r == -1, conn, "virConnectNumOfDefinedStoragePools");
+  CHECK_ERROR (r == -1, "virConnectNumOfDefinedStoragePools");
 
   CAMLreturn (Val_int (r));
 }
@@ -451,7 +451,7 @@ ocaml_libvirt_connect_list_defined_storage_pools (value connv, value iv)
   }
 
   NONBLOCKING (r = virConnectListDefinedStoragePools (conn, names, i));
-  CHECK_ERROR (r == -1, conn, "virConnectListDefinedStoragePools");
+  CHECK_ERROR (r == -1, "virConnectListDefinedStoragePools");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -477,7 +477,7 @@ ocaml_libvirt_connect_get_capabilities (value connv)
   char *r;
 
   NONBLOCKING (r = virConnectGetCapabilities (conn));
-  CHECK_ERROR (!r, conn, "virConnectGetCapabilities");
+  CHECK_ERROR (!r, "virConnectGetCapabilities");
 
   rv = caml_copy_string (r);
   free (r);
@@ -498,7 +498,7 @@ ocaml_libvirt_connect_domain_event_deregister_any (value connv, value iv)
   int r;
 
   NONBLOCKING (r = virConnectDomainEventDeregisterAny (conn, i));
-  CHECK_ERROR (r == -1, conn, "virConnectDomainEventDeregisterAny");
+  CHECK_ERROR (r == -1, "virConnectDomainEventDeregisterAny");
 
   CAMLreturn (Val_unit);
 }
@@ -518,7 +518,7 @@ ocaml_libvirt_domain_create_linux (value connv, value strv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainCreateLinux (conn, str, 0));
-  CHECK_ERROR (!r, conn, "virDomainCreateLinux");
+  CHECK_ERROR (!r, "virDomainCreateLinux");
 
   rv = Val_domain (r, connv);
 
@@ -541,7 +541,7 @@ ocaml_libvirt_domain_create_xml (value connv, value strv, value uv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainCreateXML (conn, str, u));
-  CHECK_ERROR (!r, conn, "virDomainCreateXML");
+  CHECK_ERROR (!r, "virDomainCreateXML");
 
   rv = Val_domain (r, connv);
 
@@ -558,11 +558,10 @@ ocaml_libvirt_domain_free (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainFree (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainFree");
+  CHECK_ERROR (r == -1, "virDomainFree");
 
   /* So that we don't double-free in the finalizer: */
   Domain_val (domv) = NULL;
@@ -580,11 +579,10 @@ ocaml_libvirt_domain_destroy (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainDestroy (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainDestroy");
+  CHECK_ERROR (r == -1, "virDomainDestroy");
 
   /* So that we don't double-free in the finalizer: */
   Domain_val (domv) = NULL;
@@ -607,7 +605,7 @@ ocaml_libvirt_domain_lookup_by_name (value connv, value strv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainLookupByName (conn, str));
-  CHECK_ERROR (!r, conn, "virDomainLookupByName");
+  CHECK_ERROR (!r, "virDomainLookupByName");
 
   rv = Val_domain (r, connv);
 
@@ -629,7 +627,7 @@ ocaml_libvirt_domain_lookup_by_id (value connv, value iv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainLookupByID (conn, i));
-  CHECK_ERROR (!r, conn, "virDomainLookupByID");
+  CHECK_ERROR (!r, "virDomainLookupByID");
 
   rv = Val_domain (r, connv);
 
@@ -651,7 +649,7 @@ ocaml_libvirt_domain_lookup_by_uuid (value connv, value uuidv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainLookupByUUID (conn, uuid));
-  CHECK_ERROR (!r, conn, "virDomainLookupByUUID");
+  CHECK_ERROR (!r, "virDomainLookupByUUID");
 
   rv = Val_domain (r, connv);
 
@@ -673,7 +671,7 @@ ocaml_libvirt_domain_lookup_by_uuid_string (value connv, value strv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainLookupByUUIDString (conn, str));
-  CHECK_ERROR (!r, conn, "virDomainLookupByUUIDString");
+  CHECK_ERROR (!r, "virDomainLookupByUUIDString");
 
   rv = Val_domain (r, connv);
 
@@ -691,11 +689,10 @@ ocaml_libvirt_domain_get_name (value domv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   const char *r;
 
   NONBLOCKING (r = virDomainGetName (dom));
-  CHECK_ERROR (!r, conn, "virDomainGetName");
+  CHECK_ERROR (!r, "virDomainGetName");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -712,11 +709,10 @@ ocaml_libvirt_domain_get_os_type (value domv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *r;
 
   NONBLOCKING (r = virDomainGetOSType (dom));
-  CHECK_ERROR (!r, conn, "virDomainGetOSType");
+  CHECK_ERROR (!r, "virDomainGetOSType");
 
   rv = caml_copy_string (r);
   free (r);
@@ -734,11 +730,10 @@ ocaml_libvirt_domain_get_xml_desc (value domv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *r;
 
   NONBLOCKING (r = virDomainGetXMLDesc (dom, 0));
-  CHECK_ERROR (!r, conn, "virDomainGetXMLDesc");
+  CHECK_ERROR (!r, "virDomainGetXMLDesc");
 
   rv = caml_copy_string (r);
   free (r);
@@ -756,12 +751,11 @@ ocaml_libvirt_domain_get_uuid (value domv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   unsigned char uuid[VIR_UUID_BUFLEN];
   int r;
 
   NONBLOCKING (r = virDomainGetUUID (dom, uuid));
-  CHECK_ERROR (r == -1, conn, "virDomainGetUUID");
+  CHECK_ERROR (r == -1, "virDomainGetUUID");
 
   /* UUIDs are byte arrays with a fixed length. */
   rv = caml_alloc_string (VIR_UUID_BUFLEN);
@@ -780,12 +774,11 @@ ocaml_libvirt_domain_get_uuid_string (value domv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char uuid[VIR_UUID_STRING_BUFLEN];
   int r;
 
   NONBLOCKING (r = virDomainGetUUIDString (dom, uuid));
-  CHECK_ERROR (r == -1, conn, "virDomainGetUUIDString");
+  CHECK_ERROR (r == -1, "virDomainGetUUIDString");
 
   rv = caml_copy_string (uuid);
   CAMLreturn (rv);
@@ -801,11 +794,10 @@ ocaml_libvirt_domain_get_max_vcpus (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainGetMaxVcpus (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainGetMaxVcpus");
+  CHECK_ERROR (r == -1, "virDomainGetMaxVcpus");
 
   CAMLreturn (Val_int (r));
 }
@@ -820,12 +812,11 @@ ocaml_libvirt_domain_save (value domv, value strv)
   CAMLparam2 (domv, strv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *str = String_val (strv);
   int r;
 
   NONBLOCKING (r = virDomainSave (dom, str));
-  CHECK_ERROR (r == -1, conn, "virDomainSave");
+  CHECK_ERROR (r == -1, "virDomainSave");
 
   CAMLreturn (Val_unit);
 }
@@ -844,7 +835,7 @@ ocaml_libvirt_domain_restore (value connv, value strv)
   int r;
 
   NONBLOCKING (r = virDomainRestore (conn, str));
-  CHECK_ERROR (r == -1, conn, "virDomainRestore");
+  CHECK_ERROR (r == -1, "virDomainRestore");
 
   CAMLreturn (Val_unit);
 }
@@ -860,12 +851,11 @@ ocaml_libvirt_domain_core_dump (value domv, value strv)
 
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *str = String_val (strv);
   int r;
 
   NONBLOCKING (r = virDomainCoreDump (dom, str, 0));
-  CHECK_ERROR (!r, conn, "virDomainCoreDump");
+  CHECK_ERROR (!r, "virDomainCoreDump");
 
   CAMLreturn (Val_unit);
 }
@@ -880,11 +870,10 @@ ocaml_libvirt_domain_suspend (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainSuspend (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainSuspend");
+  CHECK_ERROR (r == -1, "virDomainSuspend");
 
   CAMLreturn (Val_unit);
 }
@@ -899,11 +888,10 @@ ocaml_libvirt_domain_resume (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainResume (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainResume");
+  CHECK_ERROR (r == -1, "virDomainResume");
 
   CAMLreturn (Val_unit);
 }
@@ -918,11 +906,10 @@ ocaml_libvirt_domain_shutdown (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainShutdown (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainShutdown");
+  CHECK_ERROR (r == -1, "virDomainShutdown");
 
   CAMLreturn (Val_unit);
 }
@@ -937,11 +924,10 @@ ocaml_libvirt_domain_reboot (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainReboot (dom, 0));
-  CHECK_ERROR (r == -1, conn, "virDomainReboot");
+  CHECK_ERROR (r == -1, "virDomainReboot");
 
   CAMLreturn (Val_unit);
 }
@@ -961,7 +947,7 @@ ocaml_libvirt_domain_define_xml (value connv, value strv)
   virDomainPtr r;
 
   NONBLOCKING (r = virDomainDefineXML (conn, str));
-  CHECK_ERROR (!r, conn, "virDomainDefineXML");
+  CHECK_ERROR (!r, "virDomainDefineXML");
 
   rv = Val_domain (r, connv);
 
@@ -978,11 +964,10 @@ ocaml_libvirt_domain_undefine (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainUndefine (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainUndefine");
+  CHECK_ERROR (r == -1, "virDomainUndefine");
 
   CAMLreturn (Val_unit);
 }
@@ -997,11 +982,10 @@ ocaml_libvirt_domain_create (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r;
 
   NONBLOCKING (r = virDomainCreate (dom));
-  CHECK_ERROR (r == -1, conn, "virDomainCreate");
+  CHECK_ERROR (r == -1, "virDomainCreate");
 
   CAMLreturn (Val_unit);
 }
@@ -1016,12 +1000,11 @@ ocaml_libvirt_domain_attach_device (value domv, value strv)
   CAMLparam2 (domv, strv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *str = String_val (strv);
   int r;
 
   NONBLOCKING (r = virDomainAttachDevice (dom, str));
-  CHECK_ERROR (r == -1, conn, "virDomainAttachDevice");
+  CHECK_ERROR (r == -1, "virDomainAttachDevice");
 
   CAMLreturn (Val_unit);
 }
@@ -1036,12 +1019,11 @@ ocaml_libvirt_domain_detach_device (value domv, value strv)
   CAMLparam2 (domv, strv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *str = String_val (strv);
   int r;
 
   NONBLOCKING (r = virDomainDetachDevice (dom, str));
-  CHECK_ERROR (r == -1, conn, "virDomainDetachDevice");
+  CHECK_ERROR (r == -1, "virDomainDetachDevice");
 
   CAMLreturn (Val_unit);
 }
@@ -1056,11 +1038,10 @@ ocaml_libvirt_domain_get_autostart (value domv)
   CAMLparam1 (domv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r, b;
 
   NONBLOCKING (r = virDomainGetAutostart (dom, &b));
-  CHECK_ERROR (r == -1, conn, "virDomainGetAutostart");
+  CHECK_ERROR (r == -1, "virDomainGetAutostart");
 
   CAMLreturn (b ? Val_true : Val_false);
 }
@@ -1075,13 +1056,12 @@ ocaml_libvirt_domain_set_autostart (value domv, value bv)
   CAMLparam2 (domv, bv);
 
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r, b;
 
   b = bv == Val_true ? 1 : 0;
 
   NONBLOCKING (r = virDomainSetAutostart (dom, b));
-  CHECK_ERROR (r == -1, conn, "virDomainSetAutostart");
+  CHECK_ERROR (r == -1, "virDomainSetAutostart");
 
   CAMLreturn (Val_unit);
 }
@@ -1096,11 +1076,10 @@ ocaml_libvirt_network_free (value netv)
   CAMLparam1 (netv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r;
 
   NONBLOCKING (r = virNetworkFree (net));
-  CHECK_ERROR (r == -1, conn, "virNetworkFree");
+  CHECK_ERROR (r == -1, "virNetworkFree");
 
   /* So that we don't double-free in the finalizer: */
   Network_val (netv) = NULL;
@@ -1118,11 +1097,10 @@ ocaml_libvirt_network_destroy (value netv)
   CAMLparam1 (netv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r;
 
   NONBLOCKING (r = virNetworkDestroy (net));
-  CHECK_ERROR (r == -1, conn, "virNetworkDestroy");
+  CHECK_ERROR (r == -1, "virNetworkDestroy");
 
   /* So that we don't double-free in the finalizer: */
   Network_val (netv) = NULL;
@@ -1145,7 +1123,7 @@ ocaml_libvirt_network_lookup_by_name (value connv, value strv)
   virNetworkPtr r;
 
   NONBLOCKING (r = virNetworkLookupByName (conn, str));
-  CHECK_ERROR (!r, conn, "virNetworkLookupByName");
+  CHECK_ERROR (!r, "virNetworkLookupByName");
 
   rv = Val_network (r, connv);
 
@@ -1167,7 +1145,7 @@ ocaml_libvirt_network_lookup_by_uuid (value connv, value uuidv)
   virNetworkPtr r;
 
   NONBLOCKING (r = virNetworkLookupByUUID (conn, uuid));
-  CHECK_ERROR (!r, conn, "virNetworkLookupByUUID");
+  CHECK_ERROR (!r, "virNetworkLookupByUUID");
 
   rv = Val_network (r, connv);
 
@@ -1189,7 +1167,7 @@ ocaml_libvirt_network_lookup_by_uuid_string (value connv, value strv)
   virNetworkPtr r;
 
   NONBLOCKING (r = virNetworkLookupByUUIDString (conn, str));
-  CHECK_ERROR (!r, conn, "virNetworkLookupByUUIDString");
+  CHECK_ERROR (!r, "virNetworkLookupByUUIDString");
 
   rv = Val_network (r, connv);
 
@@ -1207,11 +1185,10 @@ ocaml_libvirt_network_get_name (value netv)
 
   CAMLlocal1 (rv);
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   const char *r;
 
   NONBLOCKING (r = virNetworkGetName (net));
-  CHECK_ERROR (!r, conn, "virNetworkGetName");
+  CHECK_ERROR (!r, "virNetworkGetName");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -1228,11 +1205,10 @@ ocaml_libvirt_network_get_xml_desc (value netv)
 
   CAMLlocal1 (rv);
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   char *r;
 
   NONBLOCKING (r = virNetworkGetXMLDesc (net, 0));
-  CHECK_ERROR (!r, conn, "virNetworkGetXMLDesc");
+  CHECK_ERROR (!r, "virNetworkGetXMLDesc");
 
   rv = caml_copy_string (r);
   free (r);
@@ -1250,11 +1226,10 @@ ocaml_libvirt_network_get_bridge_name (value netv)
 
   CAMLlocal1 (rv);
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   char *r;
 
   NONBLOCKING (r = virNetworkGetBridgeName (net));
-  CHECK_ERROR (!r, conn, "virNetworkGetBridgeName");
+  CHECK_ERROR (!r, "virNetworkGetBridgeName");
 
   rv = caml_copy_string (r);
   free (r);
@@ -1272,12 +1247,11 @@ ocaml_libvirt_network_get_uuid (value netv)
 
   CAMLlocal1 (rv);
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   unsigned char uuid[VIR_UUID_BUFLEN];
   int r;
 
   NONBLOCKING (r = virNetworkGetUUID (net, uuid));
-  CHECK_ERROR (r == -1, conn, "virNetworkGetUUID");
+  CHECK_ERROR (r == -1, "virNetworkGetUUID");
 
   /* UUIDs are byte arrays with a fixed length. */
   rv = caml_alloc_string (VIR_UUID_BUFLEN);
@@ -1296,12 +1270,11 @@ ocaml_libvirt_network_get_uuid_string (value netv)
 
   CAMLlocal1 (rv);
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   char uuid[VIR_UUID_STRING_BUFLEN];
   int r;
 
   NONBLOCKING (r = virNetworkGetUUIDString (net, uuid));
-  CHECK_ERROR (r == -1, conn, "virNetworkGetUUIDString");
+  CHECK_ERROR (r == -1, "virNetworkGetUUIDString");
 
   rv = caml_copy_string (uuid);
   CAMLreturn (rv);
@@ -1317,11 +1290,10 @@ ocaml_libvirt_network_undefine (value netv)
   CAMLparam1 (netv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r;
 
   NONBLOCKING (r = virNetworkUndefine (net));
-  CHECK_ERROR (r == -1, conn, "virNetworkUndefine");
+  CHECK_ERROR (r == -1, "virNetworkUndefine");
 
   CAMLreturn (Val_unit);
 }
@@ -1341,7 +1313,7 @@ ocaml_libvirt_network_create_xml (value connv, value strv)
   virNetworkPtr r;
 
   NONBLOCKING (r = virNetworkCreateXML (conn, str));
-  CHECK_ERROR (!r, conn, "virNetworkCreateXML");
+  CHECK_ERROR (!r, "virNetworkCreateXML");
 
   rv = Val_network (r, connv);
 
@@ -1363,7 +1335,7 @@ ocaml_libvirt_network_define_xml (value connv, value strv)
   virNetworkPtr r;
 
   NONBLOCKING (r = virNetworkDefineXML (conn, str));
-  CHECK_ERROR (!r, conn, "virNetworkDefineXML");
+  CHECK_ERROR (!r, "virNetworkDefineXML");
 
   rv = Val_network (r, connv);
 
@@ -1380,11 +1352,10 @@ ocaml_libvirt_network_create (value netv)
   CAMLparam1 (netv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r;
 
   NONBLOCKING (r = virNetworkCreate (net));
-  CHECK_ERROR (r == -1, conn, "virNetworkCreate");
+  CHECK_ERROR (r == -1, "virNetworkCreate");
 
   CAMLreturn (Val_unit);
 }
@@ -1399,11 +1370,10 @@ ocaml_libvirt_network_get_autostart (value netv)
   CAMLparam1 (netv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r, b;
 
   NONBLOCKING (r = virNetworkGetAutostart (net, &b));
-  CHECK_ERROR (r == -1, conn, "virNetworkGetAutostart");
+  CHECK_ERROR (r == -1, "virNetworkGetAutostart");
 
   CAMLreturn (b ? Val_true : Val_false);
 }
@@ -1418,13 +1388,12 @@ ocaml_libvirt_network_set_autostart (value netv, value bv)
   CAMLparam2 (netv, bv);
 
   virNetworkPtr net = Network_val (netv);
-  virConnectPtr conn = Connect_netv (netv);
   int r, b;
 
   b = bv == Val_true ? 1 : 0;
 
   NONBLOCKING (r = virNetworkSetAutostart (net, b));
-  CHECK_ERROR (r == -1, conn, "virNetworkSetAutostart");
+  CHECK_ERROR (r == -1, "virNetworkSetAutostart");
 
   CAMLreturn (Val_unit);
 }
@@ -1439,11 +1408,10 @@ ocaml_libvirt_storage_pool_free (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolFree (pool));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolFree");
+  CHECK_ERROR (r == -1, "virStoragePoolFree");
 
   /* So that we don't double-free in the finalizer: */
   Pool_val (poolv) = NULL;
@@ -1461,11 +1429,10 @@ ocaml_libvirt_storage_pool_destroy (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolDestroy (pool));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolDestroy");
+  CHECK_ERROR (r == -1, "virStoragePoolDestroy");
 
   /* So that we don't double-free in the finalizer: */
   Pool_val (poolv) = NULL;
@@ -1488,7 +1455,7 @@ ocaml_libvirt_storage_pool_lookup_by_name (value connv, value strv)
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolLookupByName (conn, str));
-  CHECK_ERROR (!r, conn, "virStoragePoolLookupByName");
+  CHECK_ERROR (!r, "virStoragePoolLookupByName");
 
   rv = Val_pool (r, connv);
 
@@ -1510,7 +1477,7 @@ ocaml_libvirt_storage_pool_lookup_by_uuid (value connv, value uuidv)
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolLookupByUUID (conn, uuid));
-  CHECK_ERROR (!r, conn, "virStoragePoolLookupByUUID");
+  CHECK_ERROR (!r, "virStoragePoolLookupByUUID");
 
   rv = Val_pool (r, connv);
 
@@ -1532,7 +1499,7 @@ ocaml_libvirt_storage_pool_lookup_by_uuid_string (value connv, value strv)
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolLookupByUUIDString (conn, str));
-  CHECK_ERROR (!r, conn, "virStoragePoolLookupByUUIDString");
+  CHECK_ERROR (!r, "virStoragePoolLookupByUUIDString");
 
   rv = Val_pool (r, connv);
 
@@ -1550,11 +1517,10 @@ ocaml_libvirt_storage_pool_get_name (value poolv)
 
   CAMLlocal1 (rv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   const char *r;
 
   NONBLOCKING (r = virStoragePoolGetName (pool));
-  CHECK_ERROR (!r, conn, "virStoragePoolGetName");
+  CHECK_ERROR (!r, "virStoragePoolGetName");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -1571,11 +1537,10 @@ ocaml_libvirt_storage_pool_get_xml_desc (value poolv)
 
   CAMLlocal1 (rv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   char *r;
 
   NONBLOCKING (r = virStoragePoolGetXMLDesc (pool, 0));
-  CHECK_ERROR (!r, conn, "virStoragePoolGetXMLDesc");
+  CHECK_ERROR (!r, "virStoragePoolGetXMLDesc");
 
   rv = caml_copy_string (r);
   free (r);
@@ -1593,12 +1558,11 @@ ocaml_libvirt_storage_pool_get_uuid (value poolv)
 
   CAMLlocal1 (rv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   unsigned char uuid[VIR_UUID_BUFLEN];
   int r;
 
   NONBLOCKING (r = virStoragePoolGetUUID (pool, uuid));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolGetUUID");
+  CHECK_ERROR (r == -1, "virStoragePoolGetUUID");
 
   /* UUIDs are byte arrays with a fixed length. */
   rv = caml_alloc_string (VIR_UUID_BUFLEN);
@@ -1617,12 +1581,11 @@ ocaml_libvirt_storage_pool_get_uuid_string (value poolv)
 
   CAMLlocal1 (rv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   char uuid[VIR_UUID_STRING_BUFLEN];
   int r;
 
   NONBLOCKING (r = virStoragePoolGetUUIDString (pool, uuid));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolGetUUIDString");
+  CHECK_ERROR (r == -1, "virStoragePoolGetUUIDString");
 
   rv = caml_copy_string (uuid);
   CAMLreturn (rv);
@@ -1643,7 +1606,7 @@ ocaml_libvirt_storage_pool_create_xml (value connv, value strv)
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolCreateXML (conn, str, 0));
-  CHECK_ERROR (!r, conn, "virStoragePoolCreateXML");
+  CHECK_ERROR (!r, "virStoragePoolCreateXML");
 
   rv = Val_pool (r, connv);
 
@@ -1665,7 +1628,7 @@ ocaml_libvirt_storage_pool_define_xml (value connv, value strv)
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolDefineXML (conn, str, 0));
-  CHECK_ERROR (!r, conn, "virStoragePoolDefineXML");
+  CHECK_ERROR (!r, "virStoragePoolDefineXML");
 
   rv = Val_pool (r, connv);
 
@@ -1682,12 +1645,11 @@ ocaml_libvirt_storage_pool_build (value poolv, value iv)
   CAMLparam2 (poolv, iv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   unsigned int i = Int_val (iv);
   int r;
 
   NONBLOCKING (r = virStoragePoolBuild (pool, i));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolBuild");
+  CHECK_ERROR (r == -1, "virStoragePoolBuild");
 
   CAMLreturn (Val_unit);
 }
@@ -1702,11 +1664,10 @@ ocaml_libvirt_storage_pool_undefine (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolUndefine (pool));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolUndefine");
+  CHECK_ERROR (r == -1, "virStoragePoolUndefine");
 
   CAMLreturn (Val_unit);
 }
@@ -1721,11 +1682,10 @@ ocaml_libvirt_storage_pool_create (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolCreate (pool, 0));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolCreate");
+  CHECK_ERROR (r == -1, "virStoragePoolCreate");
 
   CAMLreturn (Val_unit);
 }
@@ -1740,12 +1700,11 @@ ocaml_libvirt_storage_pool_delete (value poolv, value iv)
   CAMLparam2 (poolv, iv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   unsigned int i = Int_val (iv);
   int r;
 
   NONBLOCKING (r = virStoragePoolDelete (pool, i));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolDelete");
+  CHECK_ERROR (r == -1, "virStoragePoolDelete");
 
   CAMLreturn (Val_unit);
 }
@@ -1760,11 +1719,10 @@ ocaml_libvirt_storage_pool_refresh (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolRefresh (pool, 0));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolRefresh");
+  CHECK_ERROR (r == -1, "virStoragePoolRefresh");
 
   CAMLreturn (Val_unit);
 }
@@ -1779,11 +1737,10 @@ ocaml_libvirt_storage_pool_get_autostart (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r, b;
 
   NONBLOCKING (r = virStoragePoolGetAutostart (pool, &b));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolGetAutostart");
+  CHECK_ERROR (r == -1, "virStoragePoolGetAutostart");
 
   CAMLreturn (b ? Val_true : Val_false);
 }
@@ -1798,13 +1755,12 @@ ocaml_libvirt_storage_pool_set_autostart (value poolv, value bv)
   CAMLparam2 (poolv, bv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r, b;
 
   b = bv == Val_true ? 1 : 0;
 
   NONBLOCKING (r = virStoragePoolSetAutostart (pool, b));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolSetAutostart");
+  CHECK_ERROR (r == -1, "virStoragePoolSetAutostart");
 
   CAMLreturn (Val_unit);
 }
@@ -1819,11 +1775,10 @@ ocaml_libvirt_storage_pool_num_of_volumes (value poolv)
   CAMLparam1 (poolv);
 
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int r;
 
   NONBLOCKING (r = virStoragePoolNumOfVolumes (pool));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolNumOfVolumes");
+  CHECK_ERROR (r == -1, "virStoragePoolNumOfVolumes");
 
   CAMLreturn (Val_int (r));
 }
@@ -1839,7 +1794,6 @@ ocaml_libvirt_storage_pool_list_volumes (value poolv, value iv)
 
   CAMLlocal2 (rv, strv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   int i = Int_val (iv);
   char *names[i];
   int r;
@@ -1855,7 +1809,7 @@ ocaml_libvirt_storage_pool_list_volumes (value poolv, value iv)
   }
 
   NONBLOCKING (r = virStoragePoolListVolumes (pool, names, i));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolListVolumes");
+  CHECK_ERROR (r == -1, "virStoragePoolListVolumes");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -1877,11 +1831,10 @@ ocaml_libvirt_storage_vol_free (value volv)
   CAMLparam1 (volv);
 
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   int r;
 
   NONBLOCKING (r = virStorageVolFree (vol));
-  CHECK_ERROR (r == -1, conn, "virStorageVolFree");
+  CHECK_ERROR (r == -1, "virStorageVolFree");
 
   /* So that we don't double-free in the finalizer: */
   Volume_val (volv) = NULL;
@@ -1899,12 +1852,11 @@ ocaml_libvirt_storage_vol_delete (value volv, value iv)
   CAMLparam2 (volv, iv);
 
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   unsigned int i = Int_val (iv);
   int r;
 
   NONBLOCKING (r = virStorageVolDelete (vol, i));
-  CHECK_ERROR (r == -1, conn, "virStorageVolDelete");
+  CHECK_ERROR (r == -1, "virStorageVolDelete");
 
   CAMLreturn (Val_unit);
 }
@@ -1920,12 +1872,11 @@ ocaml_libvirt_storage_vol_lookup_by_name (value poolv, value strv)
 
   CAMLlocal2 (rv, connv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   char *str = String_val (strv);
   virStorageVolPtr r;
 
   NONBLOCKING (r = virStorageVolLookupByName (pool, str));
-  CHECK_ERROR (!r, conn, "virStorageVolLookupByName");
+  CHECK_ERROR (!r, "virStorageVolLookupByName");
 
   connv = Field (poolv, 1);
   rv = Val_volume (r, connv);
@@ -1948,7 +1899,7 @@ ocaml_libvirt_storage_vol_lookup_by_key (value connv, value strv)
   virStorageVolPtr r;
 
   NONBLOCKING (r = virStorageVolLookupByKey (conn, str));
-  CHECK_ERROR (!r, conn, "virStorageVolLookupByKey");
+  CHECK_ERROR (!r, "virStorageVolLookupByKey");
 
   rv = Val_volume (r, connv);
 
@@ -1970,7 +1921,7 @@ ocaml_libvirt_storage_vol_lookup_by_path (value connv, value strv)
   virStorageVolPtr r;
 
   NONBLOCKING (r = virStorageVolLookupByPath (conn, str));
-  CHECK_ERROR (!r, conn, "virStorageVolLookupByPath");
+  CHECK_ERROR (!r, "virStorageVolLookupByPath");
 
   rv = Val_volume (r, connv);
 
@@ -1988,12 +1939,11 @@ ocaml_libvirt_storage_vol_create_xml (value poolv, value strv)
 
   CAMLlocal2 (rv, connv);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   char *str = String_val (strv);
   virStorageVolPtr r;
 
   NONBLOCKING (r = virStorageVolCreateXML (pool, str, 0));
-  CHECK_ERROR (!r, conn, "virStorageVolCreateXML");
+  CHECK_ERROR (!r, "virStorageVolCreateXML");
 
   connv = Field (poolv, 1);
   rv = Val_volume (r, connv);
@@ -2012,11 +1962,10 @@ ocaml_libvirt_storage_vol_get_xml_desc (value volv)
 
   CAMLlocal1 (rv);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   char *r;
 
   NONBLOCKING (r = virStorageVolGetXMLDesc (vol, 0));
-  CHECK_ERROR (!r, conn, "virStorageVolGetXMLDesc");
+  CHECK_ERROR (!r, "virStorageVolGetXMLDesc");
 
   rv = caml_copy_string (r);
   free (r);
@@ -2034,11 +1983,10 @@ ocaml_libvirt_storage_vol_get_path (value volv)
 
   CAMLlocal1 (rv);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   char *r;
 
   NONBLOCKING (r = virStorageVolGetPath (vol));
-  CHECK_ERROR (!r, conn, "virStorageVolGetPath");
+  CHECK_ERROR (!r, "virStorageVolGetPath");
 
   rv = caml_copy_string (r);
   free (r);
@@ -2056,11 +2004,10 @@ ocaml_libvirt_storage_vol_get_key (value volv)
 
   CAMLlocal1 (rv);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   const char *r;
 
   NONBLOCKING (r = virStorageVolGetKey (vol));
-  CHECK_ERROR (!r, conn, "virStorageVolGetKey");
+  CHECK_ERROR (!r, "virStorageVolGetKey");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -2077,11 +2024,10 @@ ocaml_libvirt_storage_vol_get_name (value volv)
 
   CAMLlocal1 (rv);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   const char *r;
 
   NONBLOCKING (r = virStorageVolGetName (vol));
-  CHECK_ERROR (!r, conn, "virStorageVolGetName");
+  CHECK_ERROR (!r, "virStorageVolGetName");
 
   rv = caml_copy_string (r);
   CAMLreturn (rv);
@@ -2098,11 +2044,10 @@ ocaml_libvirt_storage_pool_lookup_by_volume (value volv)
 
   CAMLlocal2 (rv, connv);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   virStoragePoolPtr r;
 
   NONBLOCKING (r = virStoragePoolLookupByVolume (vol));
-  CHECK_ERROR (!r, conn, "virStoragePoolLookupByVolume");
+  CHECK_ERROR (!r, "virStoragePoolLookupByVolume");
 
   connv = Field (volv, 1);
   rv = Val_pool (r, connv);
diff --git a/libvirt/libvirt_c_epilogue.c b/libvirt/libvirt_c_epilogue.c
index 4649724..4972e50 100644
--- a/libvirt/libvirt_c_epilogue.c
+++ b/libvirt/libvirt_c_epilogue.c
@@ -57,14 +57,14 @@ option_default (value option, value deflt)
 #endif
 
 static void
-_raise_virterror (virConnectPtr conn, const char *fn)
+_raise_virterror (const char *fn)
 {
   CAMLparam0 ();
   CAMLlocal1 (rv);
   virErrorPtr errp;
   struct _virError err;
 
-  errp = conn ? virConnGetLastError (conn) : virGetLastError ();
+  errp = virGetLastError ();
 
   if (!errp) {
     /* Fake a _virError structure. */
diff --git a/libvirt/libvirt_c_oneoffs.c b/libvirt/libvirt_c_oneoffs.c
index 06b3852..32e5a4b 100644
--- a/libvirt/libvirt_c_oneoffs.c
+++ b/libvirt/libvirt_c_oneoffs.c
@@ -32,7 +32,7 @@ ocaml_libvirt_get_version (value driverv, value unit)
 
   typeVer_ptr = driver ? &typeVer : NULL;
   NONBLOCKING (r = virGetVersion (&libVer, driver, typeVer_ptr));
-  CHECK_ERROR (r == -1, NULL, "virGetVersion");
+  CHECK_ERROR (r == -1, "virGetVersion");
 
   rv = caml_alloc_tuple (2);
   Store_field (rv, 0, Val_int (libVer));
@@ -53,7 +53,7 @@ ocaml_libvirt_connect_open (value namev, value unit)
   virConnectPtr conn;
 
   NONBLOCKING (conn = virConnectOpen (name));
-  CHECK_ERROR (!conn, NULL, "virConnectOpen");
+  CHECK_ERROR (!conn, "virConnectOpen");
 
   rv = Val_connect (conn);
 
@@ -69,7 +69,7 @@ ocaml_libvirt_connect_open_readonly (value namev, value unit)
   virConnectPtr conn;
 
   NONBLOCKING (conn = virConnectOpenReadOnly (name));
-  CHECK_ERROR (!conn, NULL, "virConnectOpen");
+  CHECK_ERROR (!conn, "virConnectOpen");
 
   rv = Val_connect (conn);
 
@@ -85,7 +85,7 @@ ocaml_libvirt_connect_get_version (value connv)
   int r;
 
   NONBLOCKING (r = virConnectGetVersion (conn, &hvVer));
-  CHECK_ERROR (r == -1, conn, "virConnectGetVersion");
+  CHECK_ERROR (r == -1, "virConnectGetVersion");
 
   CAMLreturn (Val_int (hvVer));
 }
@@ -99,7 +99,7 @@ ocaml_libvirt_connect_get_max_vcpus (value connv, value typev)
   int r;
 
   NONBLOCKING (r = virConnectGetMaxVcpus (conn, type));
-  CHECK_ERROR (r == -1, conn, "virConnectGetMaxVcpus");
+  CHECK_ERROR (r == -1, "virConnectGetMaxVcpus");
 
   CAMLreturn (Val_int (r));
 }
@@ -114,7 +114,7 @@ ocaml_libvirt_connect_get_node_info (value connv)
   int r;
 
   NONBLOCKING (r = virNodeGetInfo (conn, &info));
-  CHECK_ERROR (r == -1, conn, "virNodeGetInfo");
+  CHECK_ERROR (r == -1, "virNodeGetInfo");
 
   rv = caml_alloc (8, 0);
   v = caml_copy_string (info.model); Store_field (rv, 0, v);
@@ -138,7 +138,7 @@ ocaml_libvirt_connect_node_get_free_memory (value connv)
   unsigned long long r;
 
   NONBLOCKING (r = virNodeGetFreeMemory (conn));
-  CHECK_ERROR (r == 0, conn, "virNodeGetFreeMemory");
+  CHECK_ERROR (r == 0, "virNodeGetFreeMemory");
 
   rv = caml_copy_int64 ((int64_t) r);
   CAMLreturn (rv);
@@ -157,7 +157,7 @@ ocaml_libvirt_connect_node_get_cells_free_memory (value connv,
   unsigned long long freemems[max];
 
   NONBLOCKING (r = virNodeGetCellsFreeMemory (conn, freemems, start, max));
-  CHECK_ERROR (r == -1, conn, "virNodeGetCellsFreeMemory");
+  CHECK_ERROR (r == -1, "virNodeGetCellsFreeMemory");
 
   rv = caml_alloc (r, 0);
   for (i = 0; i < r; ++i) {
@@ -179,7 +179,7 @@ ocaml_libvirt_connect_set_keep_alive(value connv,
   int r;
 
   NONBLOCKING(r = virConnectSetKeepAlive(conn, interval, count));
-  CHECK_ERROR (r == -1, conn, "virConnectSetKeepAlive");
+  CHECK_ERROR (r == -1, "virConnectSetKeepAlive");
 
   CAMLreturn(Val_unit);
 }
@@ -190,7 +190,6 @@ ocaml_libvirt_domain_get_id (value domv)
 {
   CAMLparam1 (domv);
   virDomainPtr dom = Domain_val (domv);
-  /*virConnectPtr conn = Connect_domv (domv);*/
   unsigned int r;
 
   NONBLOCKING (r = virDomainGetID (dom));
@@ -208,11 +207,10 @@ ocaml_libvirt_domain_get_max_memory (value domv)
   CAMLparam1 (domv);
   CAMLlocal1 (rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   unsigned long r;
 
   NONBLOCKING (r = virDomainGetMaxMemory (dom));
-  CHECK_ERROR (r == 0 /* [sic] */, conn, "virDomainGetMaxMemory");
+  CHECK_ERROR (r == 0 /* [sic] */, "virDomainGetMaxMemory");
 
   rv = caml_copy_int64 (r);
   CAMLreturn (rv);
@@ -223,12 +221,11 @@ ocaml_libvirt_domain_set_max_memory (value domv, value memv)
 {
   CAMLparam2 (domv, memv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   unsigned long mem = Int64_val (memv);
   int r;
 
   NONBLOCKING (r = virDomainSetMaxMemory (dom, mem));
-  CHECK_ERROR (r == -1, conn, "virDomainSetMaxMemory");
+  CHECK_ERROR (r == -1, "virDomainSetMaxMemory");
 
   CAMLreturn (Val_unit);
 }
@@ -238,12 +235,11 @@ ocaml_libvirt_domain_set_memory (value domv, value memv)
 {
   CAMLparam2 (domv, memv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   unsigned long mem = Int64_val (memv);
   int r;
 
   NONBLOCKING (r = virDomainSetMemory (dom, mem));
-  CHECK_ERROR (r == -1, conn, "virDomainSetMemory");
+  CHECK_ERROR (r == -1, "virDomainSetMemory");
 
   CAMLreturn (Val_unit);
 }
@@ -254,12 +250,11 @@ ocaml_libvirt_domain_get_info (value domv)
   CAMLparam1 (domv);
   CAMLlocal2 (rv, v);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   virDomainInfo info;
   int r;
 
   NONBLOCKING (r = virDomainGetInfo (dom, &info));
-  CHECK_ERROR (r == -1, conn, "virDomainGetInfo");
+  CHECK_ERROR (r == -1, "virDomainGetInfo");
 
   rv = caml_alloc (5, 0);
   Store_field (rv, 0, Val_int (info.state)); // These flags are compatible.
@@ -277,12 +272,11 @@ ocaml_libvirt_domain_get_scheduler_type (value domv)
   CAMLparam1 (domv);
   CAMLlocal2 (rv, strv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *r;
   int nparams;
 
   NONBLOCKING (r = virDomainGetSchedulerType (dom, &nparams));
-  CHECK_ERROR (!r, conn, "virDomainGetSchedulerType");
+  CHECK_ERROR (!r, "virDomainGetSchedulerType");
 
   rv = caml_alloc_tuple (2);
   strv = caml_copy_string (r); Store_field (rv, 0, strv);
@@ -297,13 +291,12 @@ ocaml_libvirt_domain_get_scheduler_parameters (value domv, value nparamsv)
   CAMLparam2 (domv, nparamsv);
   CAMLlocal4 (rv, v, v2, v3);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int nparams = Int_val (nparamsv);
   virSchedParameter params[nparams];
   int r, i;
 
   NONBLOCKING (r = virDomainGetSchedulerParameters (dom, params, &nparams));
-  CHECK_ERROR (r == -1, conn, "virDomainGetSchedulerParameters");
+  CHECK_ERROR (r == -1, "virDomainGetSchedulerParameters");
 
   rv = caml_alloc (nparams, 0);
   for (i = 0; i < nparams; ++i) {
@@ -348,7 +341,6 @@ ocaml_libvirt_domain_set_scheduler_parameters (value domv, value paramsv)
   CAMLparam2 (domv, paramsv);
   CAMLlocal1 (v);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int nparams = Wosize_val (paramsv);
   virSchedParameter params[nparams];
   int r, i;
@@ -391,7 +383,7 @@ ocaml_libvirt_domain_set_scheduler_parameters (value domv, value paramsv)
   }
 
   NONBLOCKING (r = virDomainSetSchedulerParameters (dom, params, nparams));
-  CHECK_ERROR (r == -1, conn, "virDomainSetSchedulerParameters");
+  CHECK_ERROR (r == -1, "virDomainSetSchedulerParameters");
 
   CAMLreturn (Val_unit);
 }
@@ -401,11 +393,10 @@ ocaml_libvirt_domain_set_vcpus (value domv, value nvcpusv)
 {
   CAMLparam2 (domv, nvcpusv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int r, nvcpus = Int_val (nvcpusv);
 
   NONBLOCKING (r = virDomainSetVcpus (dom, nvcpus));
-  CHECK_ERROR (r == -1, conn, "virDomainSetVcpus");
+  CHECK_ERROR (r == -1, "virDomainSetVcpus");
 
   CAMLreturn (Val_unit);
 }
@@ -415,14 +406,13 @@ ocaml_libvirt_domain_pin_vcpu (value domv, value vcpuv, value cpumapv)
 {
   CAMLparam3 (domv, vcpuv, cpumapv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int maplen = caml_string_length (cpumapv);
   unsigned char *cpumap = (unsigned char *) String_val (cpumapv);
   int vcpu = Int_val (vcpuv);
   int r;
 
   NONBLOCKING (r = virDomainPinVcpu (dom, vcpu, cpumap, maplen));
-  CHECK_ERROR (r == -1, conn, "virDomainPinVcpu");
+  CHECK_ERROR (r == -1, "virDomainPinVcpu");
 
   CAMLreturn (Val_unit);
 }
@@ -433,7 +423,6 @@ ocaml_libvirt_domain_get_vcpus (value domv, value maxinfov, value maplenv)
   CAMLparam3 (domv, maxinfov, maplenv);
   CAMLlocal5 (rv, infov, strv, v, v2);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int maxinfo = Int_val (maxinfov);
   int maplen = Int_val (maplenv);
   virVcpuInfo info[maxinfo];
@@ -444,7 +433,7 @@ ocaml_libvirt_domain_get_vcpus (value domv, value maxinfov, value maplenv)
   memset (cpumaps, 0, maxinfo * maplen);
 
   NONBLOCKING (r = virDomainGetVcpus (dom, info, maxinfo, cpumaps, maplen));
-  CHECK_ERROR (r == -1, conn, "virDomainPinVcpu");
+  CHECK_ERROR (r == -1, "virDomainPinVcpu");
 
   /* Copy the virVcpuInfo structures. */
   infov = caml_alloc (maxinfo, 0);
@@ -476,18 +465,17 @@ ocaml_libvirt_domain_get_cpu_stats (value domv)
   CAMLlocal5 (cpustats, param_head, param_node, typed_param, typed_param_value);
   CAMLlocal1 (v);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   virTypedParameterPtr params;
   int r, cpu, ncpus, nparams, i, j, pos;
   int nr_pcpus;
 
   /* get number of pcpus */
   NONBLOCKING (nr_pcpus = virDomainGetCPUStats(dom, NULL, 0, 0, 0, 0));
-  CHECK_ERROR (nr_pcpus < 0, conn, "virDomainGetCPUStats");
+  CHECK_ERROR (nr_pcpus < 0, "virDomainGetCPUStats");
 
   /* get percpu information */
   NONBLOCKING (nparams = virDomainGetCPUStats(dom, NULL, 0, 0, 1, 0));
-  CHECK_ERROR (nparams < 0, conn, "virDomainGetCPUStats");
+  CHECK_ERROR (nparams < 0, "virDomainGetCPUStats");
 
   if ((params = malloc(sizeof(*params) * nparams * 128)) == NULL)
     caml_failwith ("virDomainGetCPUStats: malloc");
@@ -498,7 +486,7 @@ ocaml_libvirt_domain_get_cpu_stats (value domv)
     ncpus = nr_pcpus - cpu > 128 ? 128 : nr_pcpus - cpu;
 
     NONBLOCKING (r = virDomainGetCPUStats(dom, params, nparams, cpu, ncpus, 0));
-    CHECK_ERROR (r < 0, conn, "virDomainGetCPUStats");
+    CHECK_ERROR (r < 0, "virDomainGetCPUStats");
 
     for (i = 0; i < ncpus; i++) {
       /* list of typed_param: single linked list of param_nodes */
@@ -579,7 +567,6 @@ ocaml_libvirt_domain_migrate_native (value domv, value dconnv, value flagsv, val
   CAMLxparam2 (optbandwidthv, unitv);
   CAMLlocal2 (flagv, rv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   virConnectPtr dconn = Connect_val (dconnv);
   int flags = 0;
   const char *dname = Optstring_val (optdnamev);
@@ -601,7 +588,7 @@ ocaml_libvirt_domain_migrate_native (value domv, value dconnv, value flagsv, val
     bandwidth = Int_val (Field (optbandwidthv, 0));
 
   NONBLOCKING (r = virDomainMigrate (dom, dconn, flags, dname, uri, bandwidth));
-  CHECK_ERROR (!r, conn, "virDomainMigrate");
+  CHECK_ERROR (!r, "virDomainMigrate");
 
   rv = Val_domain (r, dconnv);
 
@@ -622,13 +609,12 @@ ocaml_libvirt_domain_block_stats (value domv, value pathv)
   CAMLparam2 (domv, pathv);
   CAMLlocal2 (rv,v);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *path = String_val (pathv);
   struct _virDomainBlockStats stats;
   int r;
 
   NONBLOCKING (r = virDomainBlockStats (dom, path, &stats, sizeof stats));
-  CHECK_ERROR (r == -1, conn, "virDomainBlockStats");
+  CHECK_ERROR (r == -1, "virDomainBlockStats");
 
   rv = caml_alloc (5, 0);
   v = caml_copy_int64 (stats.rd_req); Store_field (rv, 0, v);
@@ -646,13 +632,12 @@ ocaml_libvirt_domain_interface_stats (value domv, value pathv)
   CAMLparam2 (domv, pathv);
   CAMLlocal2 (rv,v);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   char *path = String_val (pathv);
   struct _virDomainInterfaceStats stats;
   int r;
 
   NONBLOCKING (r = virDomainInterfaceStats (dom, path, &stats, sizeof stats));
-  CHECK_ERROR (r == -1, conn, "virDomainInterfaceStats");
+  CHECK_ERROR (r == -1, "virDomainInterfaceStats");
 
   rv = caml_alloc (8, 0);
   v = caml_copy_int64 (stats.rx_bytes); Store_field (rv, 0, v);
@@ -673,7 +658,6 @@ ocaml_libvirt_domain_block_peek_native (value domv, value pathv, value offsetv,
   CAMLparam5 (domv, pathv, offsetv, sizev, bufferv);
   CAMLxparam1 (boffv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   const char *path = String_val (pathv);
   unsigned long long offset = Int64_val (offsetv);
   size_t size = Int_val (sizev);
@@ -687,7 +671,7 @@ ocaml_libvirt_domain_block_peek_native (value domv, value pathv, value offsetv,
 
   /* NB. not NONBLOCKING because buffer might move (XXX) */
   r = virDomainBlockPeek (dom, path, offset, size, buffer+boff, 0);
-  CHECK_ERROR (r == -1, conn, "virDomainBlockPeek");
+  CHECK_ERROR (r == -1, "virDomainBlockPeek");
 
   CAMLreturn (Val_unit);
 }
@@ -706,7 +690,6 @@ ocaml_libvirt_domain_memory_peek_native (value domv, value flagsv, value offsetv
   CAMLxparam1 (boffv);
   CAMLlocal1 (flagv);
   virDomainPtr dom = Domain_val (domv);
-  virConnectPtr conn = Connect_domv (domv);
   int flags = 0;
   unsigned long long offset = Int64_val (offsetv);
   size_t size = Int_val (sizev);
@@ -728,7 +711,7 @@ ocaml_libvirt_domain_memory_peek_native (value domv, value flagsv, value offsetv
 
   /* NB. not NONBLOCKING because buffer might move (XXX) */
   r = virDomainMemoryPeek (dom, offset, size, buffer+boff, flags);
-  CHECK_ERROR (r == -1, conn, "virDomainMemoryPeek");
+  CHECK_ERROR (r == -1, "virDomainMemoryPeek");
 
   CAMLreturn (Val_unit);
 }
@@ -1042,7 +1025,6 @@ CAMLprim value
 ocaml_libvirt_event_add_timeout (value connv, value ms, value callback_id)
 {
   CAMLparam3 (connv, ms, callback_id);
-  virConnectPtr conn = Connect_val (connv);
   void *opaque;
   virFreeCallback freecb = free;
   virEventTimeoutCallback cb = timeout_callback;
@@ -1055,7 +1037,7 @@ ocaml_libvirt_event_add_timeout (value connv, value ms, value callback_id)
     caml_failwith ("virEventAddTimeout: malloc");
   *((long*)opaque) = Int64_val(callback_id);
   NONBLOCKING(r = virEventAddTimeout(Int_val(ms), cb, opaque, freecb));
-  CHECK_ERROR(r == -1, conn, "virEventAddTimeout");
+  CHECK_ERROR(r == -1, "virEventAddTimeout");
 
   CAMLreturn(Val_int(r));
 }
@@ -1064,11 +1046,10 @@ CAMLprim value
 ocaml_libvirt_event_remove_timeout (value connv, value timer_id)
 {
   CAMLparam2 (connv, timer_id);
-  virConnectPtr conn = Connect_val (connv);
   int r;
 
   NONBLOCKING(r = virEventRemoveTimeout(Int_val(timer_id)));
-  CHECK_ERROR(r == -1, conn, "virEventRemoveTimeout");
+  CHECK_ERROR(r == -1, "virEventRemoveTimeout");
 
   CAMLreturn(Val_int(r));
 }
@@ -1146,7 +1127,7 @@ ocaml_libvirt_connect_domain_event_register_any(value connv, value domv, value c
     caml_failwith ("virConnectDomainEventRegisterAny: malloc");
   *((long*)opaque) = Int64_val(callback_id);
   NONBLOCKING(r = virConnectDomainEventRegisterAny(conn, dom, eventID, cb, opaque, freecb));
-  CHECK_ERROR(r == -1, conn, "virConnectDomainEventRegisterAny");
+  CHECK_ERROR(r == -1, "virConnectDomainEventRegisterAny");
 
   CAMLreturn(Val_int(r));
 }
@@ -1157,12 +1138,11 @@ ocaml_libvirt_storage_pool_get_info (value poolv)
   CAMLparam1 (poolv);
   CAMLlocal2 (rv, v);
   virStoragePoolPtr pool = Pool_val (poolv);
-  virConnectPtr conn = Connect_polv (poolv);
   virStoragePoolInfo info;
   int r;
 
   NONBLOCKING (r = virStoragePoolGetInfo (pool, &info));
-  CHECK_ERROR (r == -1, conn, "virStoragePoolGetInfo");
+  CHECK_ERROR (r == -1, "virStoragePoolGetInfo");
 
   rv = caml_alloc (4, 0);
   Store_field (rv, 0, Val_int (info.state));
@@ -1179,12 +1159,11 @@ ocaml_libvirt_storage_vol_get_info (value volv)
   CAMLparam1 (volv);
   CAMLlocal2 (rv, v);
   virStorageVolPtr vol = Volume_val (volv);
-  virConnectPtr conn = Connect_volv (volv);
   virStorageVolInfo info;
   int r;
 
   NONBLOCKING (r = virStorageVolGetInfo (vol, &info));
-  CHECK_ERROR (r == -1, conn, "virStorageVolGetInfo");
+  CHECK_ERROR (r == -1, "virStorageVolGetInfo");
 
   rv = caml_alloc (3, 0);
   Store_field (rv, 0, Val_int (info.type));
@@ -1239,6 +1218,12 @@ ocaml_libvirt_virterror_reset_last_conn_error (value connv)
 
 /*----------------------------------------------------------------------*/
 
+static void
+ignore_errors (void *user_data, virErrorPtr error)
+{
+  /* do nothing */
+}
+
 /* Initialise the library. */
 CAMLprim value
 ocaml_libvirt_init (value unit)
@@ -1247,8 +1232,9 @@ ocaml_libvirt_init (value unit)
   CAMLlocal1 (rv);
   int r;
 
+  virSetErrorFunc (NULL, ignore_errors);
   r = virInitialize ();
-  CHECK_ERROR (r == -1, NULL, "virInitialize");
+  CHECK_ERROR (r == -1, "virInitialize");
 
   CAMLreturn (Val_unit);
 }
diff --git a/libvirt/libvirt_c_prologue.c b/libvirt/libvirt_c_prologue.c
index 7d9c0f5..bf972e9 100644
--- a/libvirt/libvirt_c_prologue.c
+++ b/libvirt/libvirt_c_prologue.c
@@ -24,7 +24,7 @@ static char *Optstring_val (value strv);
 typedef value (*Val_ptr_t) (void *);
 static value Val_opt (void *ptr, Val_ptr_t Val_ptr);
 /*static value option_default (value option, value deflt);*/
-static void _raise_virterror (virConnectPtr conn, const char *fn) Noreturn;
+static void _raise_virterror (const char *fn) Noreturn;
 static void not_supported (const char *fn) Noreturn;
 static value Val_virterror (virErrorPtr err);
 
@@ -43,8 +43,8 @@ static value Val_virterror (virErrorPtr err);
 /* Check error condition from a libvirt function, and automatically raise
  * an exception if one is found.
  */
-#define CHECK_ERROR(cond, conn, fn) \
-  do { if (cond) _raise_virterror (conn, fn); } while (0)
+#define CHECK_ERROR(cond, fn) \
+  do { if (cond) _raise_virterror (fn); } while (0)
 
 /*----------------------------------------------------------------------*/