New upstream version 18.11-rc1

[deb_dpdk.git] / lib / librte_eal / common / eal_common_bus.c

diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 0943851..c8f1901 100644 (file)
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -37,10 +37,11 @@
 #include <rte_bus.h>
 #include <rte_debug.h>
 #include <rte_string_fns.h>
+#include <rte_errno.h>
 
 #include "eal_private.h"
 
-struct rte_bus_list rte_bus_list =
+static struct rte_bus_list rte_bus_list =
        TAILQ_HEAD_INITIALIZER(rte_bus_list);
 
 void
@@ -242,3 +243,45 @@ rte_bus_get_iommu_class(void)
        }
        return mode;
 }
+
+static int
+bus_handle_sigbus(const struct rte_bus *bus,
+                       const void *failure_addr)
+{
+       int ret;
+
+       if (!bus->sigbus_handler)
+               return -1;
+
+       ret = bus->sigbus_handler(failure_addr);
+
+       /* find bus but handle failed, keep the errno be set. */
+       if (ret < 0 && rte_errno == 0)
+               rte_errno = ENOTSUP;
+
+       return ret > 0;
+}
+
+int
+rte_bus_sigbus_handler(const void *failure_addr)
+{
+       struct rte_bus *bus;
+
+       int ret = 0;
+       int old_errno = rte_errno;
+
+       rte_errno = 0;
+
+       bus = rte_bus_find(NULL, bus_handle_sigbus, failure_addr);
+       /* can not find bus. */
+       if (!bus)
+               return 1;
+       /* find bus but handle failed, pass on the new errno. */
+       else if (rte_errno != 0)
+               return -1;
+
+       /* restore the old errno. */
+       rte_errno = old_errno;
+
+       return ret;
+}