From: Jan Blunck <jblunck@infradead.org>
Date: Mon, 24 Oct 2016 16:22:21 +0000 (-0400)
Subject: eal: add driver name alias
X-Git-Tag: spdx-start~5502
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d63eed6b2dcaf65c71d613f1f6dd172b697a1258;p=dpdk.git

eal: add driver name alias

This adds infrastructure for drivers to allow being requested by an alias
so that a renamed driver can still get loaded by its legacy name.

Signed-off-by: Jan Blunck <jblunck@infradead.org>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Tested-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---

diff --git a/lib/librte_eal/common/eal_common_vdev.c b/lib/librte_eal/common/eal_common_vdev.c
index 8b05f50e8b..0ff2377dd6 100644
--- a/lib/librte_eal/common/eal_common_vdev.c
+++ b/lib/librte_eal/common/eal_common_vdev.c
@@ -79,6 +79,14 @@ rte_eal_vdev_init(const char *name, const char *args)
 			return driver->probe(name, args);
 	}
 
+	/* Give new names precedence over aliases. */
+	TAILQ_FOREACH(driver, &vdev_driver_list, next) {
+		if (driver->driver.alias &&
+		    !strncmp(driver->driver.alias, name,
+			    strlen(driver->driver.alias)))
+			return driver->probe(name, args);
+	}
+
 	RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
 	return -EINVAL;
 }
diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index b3873bdbce..8840380df1 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -149,6 +149,7 @@ void rte_eal_device_remove(struct rte_device *dev);
 struct rte_driver {
 	TAILQ_ENTRY(rte_driver) next;  /**< Next in list. */
 	const char *name;                   /**< Driver name. */
+	const char *alias;              /**< Driver alias. */
 };
 
 /**
diff --git a/lib/librte_eal/common/include/rte_vdev.h b/lib/librte_eal/common/include/rte_vdev.h
index 97260b2faa..784e837d10 100644
--- a/lib/librte_eal/common/include/rte_vdev.h
+++ b/lib/librte_eal/common/include/rte_vdev.h
@@ -83,13 +83,18 @@ void rte_eal_vdrv_unregister(struct rte_vdev_driver *driver);
 
 #define RTE_PMD_REGISTER_VDEV(nm, vdrv)\
 RTE_INIT(vdrvinitfn_ ##vdrv);\
+static const char *vdrvinit_ ## nm ## _alias;\
 static void vdrvinitfn_ ##vdrv(void)\
 {\
 	(vdrv).driver.name = RTE_STR(nm);\
+	(vdrv).driver.alias = vdrvinit_ ## nm ## _alias;\
 	rte_eal_vdrv_register(&vdrv);\
 } \
 RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
 
+#define RTE_PMD_REGISTER_ALIAS(nm, alias)\
+static const char *vdrvinit_ ## nm ## _alias = RTE_STR(alias)
+
 #ifdef __cplusplus
 }
 #endif