This patch aim to add a helper to iterate all buses to find the
corresponding bus to handle the sigbus error.
Signed-off-by: Jeff Guo <jia....@intel.com>
Acked-by: Shaopeng He <shaopeng...@intel.com>
---
v9->v8:
no change
---
lib/librte_eal/common/eal_common_bus.c | 43 ++++++++++++++++++++++++++++++++++
lib/librte_eal/common/eal_private.h | 12 ++++++++++
2 files changed, 55 insertions(+)
diff --git a/lib/librte_eal/common/eal_common_bus.c
b/lib/librte_eal/common/eal_common_bus.c
index 0943851..62b7318 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -37,6 +37,7 @@
#include <rte_bus.h>
#include <rte_debug.h>
#include <rte_string_fns.h>
+#include <rte_errno.h>
#include "eal_private.h"
@@ -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;
+}
diff --git a/lib/librte_eal/common/eal_private.h
b/lib/librte_eal/common/eal_private.h
index bdadc4d..2337e71 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -258,4 +258,16 @@ int rte_mp_channel_init(void);
*/
void dev_callback_process(char *device_name, enum rte_dev_event_type event);
+/**
+ * Iterate all buses to find the corresponding bus, to handle the sigbus error.
+ * @param failure_addr
+ * Pointer of the fault address of the sigbus error.
+ *
+ * @return
+ * 0 success to handle the sigbus.
+ * -1 failed to handle the sigbus
+ * 1 no bus can handler the sigbus
+ */
+int rte_bus_sigbus_handler(const void *failure_addr);
+
#endif /* _EAL_PRIVATE_H_ */
--
2.7.4
