[dpdk-dev] [PATCH v12 3/7] bus: add sigbus handler

Jeff Guo jia.guo at intel.com
Tue Oct 2 14:35:22 CEST 2018


When a device is hot-unplugged, a sigbus error will occur of the datapath
can still read/write to the device. A handler is required here to capture
the sigbus signal and handle it appropriately.

This patch introduces a bus ops to handle sigbus errors. Each bus can
implement its own case-dependent logic to handle the sigbus errors.

Signed-off-by: Jeff Guo <jia.guo at intel.com>
Acked-by: Shaopeng He <shaopeng.he at intel.com>
---
v12->v11:
no change.
---
 lib/librte_eal/common/include/rte_bus.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 1bb53dc..201454a 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -182,6 +182,21 @@ typedef int (*rte_bus_parse_t)(const char *name, void *addr);
 typedef int (*rte_bus_hot_unplug_handler_t)(struct rte_device *dev);
 
 /**
+ * Implement a specific sigbus handler, which is responsible for handling
+ * the sigbus error which is either original memory error, or specific memory
+ * error that caused of device be hot-unplugged. When sigbus error be captured,
+ * it could call this function to handle sigbus error.
+ * @param failure_addr
+ *	Pointer of the fault address of the sigbus error.
+ *
+ * @return
+ *	0 for success handle the sigbus.
+ *	1 for no bus handle the sigbus.
+ *	-1 for failed to handle the sigbus
+ */
+typedef int (*rte_bus_sigbus_handler_t)(const void *failure_addr);
+
+/**
  * Bus scan policies
  */
 enum rte_bus_scan_mode {
@@ -228,6 +243,9 @@ struct rte_bus {
 	rte_dev_iterate_t dev_iterate; /**< Device iterator. */
 	rte_bus_hot_unplug_handler_t hot_unplug_handler;
 				/**< handle hot-unplug failure on the bus */
+	rte_bus_sigbus_handler_t sigbus_handler;
+					/**< handle sigbus error on the bus */
+
 };
 
 /**
-- 
2.7.4



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