[dpdk-dev] [PATCH v6 17/19] devargs: clone function

[Gaetan Rivet]

This function returns a deep copy of an rte_devargs.

Signed-off-by: Gaetan Rivet <gaetan.rivet at 6wind.com>
---
 lib/librte_eal/bsdapp/eal/rte_eal_version.map   |  1 +
 lib/librte_eal/common/eal_common_devargs.c      | 19 +++++++++++++++++++
 lib/librte_eal/common/include/rte_devargs.h     | 12 ++++++++++++
 lib/librte_eal/linuxapp/eal/rte_eal_version.map |  1 +
 4 files changed, 33 insertions(+)

diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index cec3894..05e2475 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -200,6 +200,7 @@ DPDK_17.08 {
 	rte_bus_find;
 	rte_bus_find_by_device;
 	rte_bus_find_by_name;
+	rte_eal_devargs_clone;
 	rte_eal_devargs_parse;
 
 } DPDK_17.05;
diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index 3ea070d..be8951d 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -185,6 +185,25 @@ rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str)
 	return -1;
 }
 
+/* Deep-copy of an rte_devargs. */
+struct rte_devargs *
+rte_eal_devargs_clone(struct rte_devargs *da)
+{
+	struct rte_devargs *clone;
+
+	clone = calloc(1, sizeof(*clone));
+	if (clone == NULL)
+		return NULL;
+	snprintf(clone->name, sizeof(clone->name), "%s", da->name);
+	clone->args = strdup(da->args ? da->args : "");
+	clone->bus = da->bus;
+	if (clone->args == NULL) {
+		free(clone);
+		return NULL;
+	}
+	return clone;
+}
+
 /* count the number of devices of a specified type */
 unsigned int
 rte_eal_devargs_type_count(enum rte_devtype devtype)
diff --git a/lib/librte_eal/common/include/rte_devargs.h b/lib/librte_eal/common/include/rte_devargs.h
index 2ab8864..892b035 100644
--- a/lib/librte_eal/common/include/rte_devargs.h
+++ b/lib/librte_eal/common/include/rte_devargs.h
@@ -163,6 +163,18 @@ rte_eal_devargs_parse(const char *dev,
 int rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str);
 
 /**
+ * Deep copy an rte_devargs.
+ *
+ * @param da
+ *   Source devargs.
+ *
+ * @return
+ *   The pointer to the new rte_devargs on success.
+ *   NULL on error.
+ */
+struct rte_devargs *rte_eal_devargs_clone(struct rte_devargs *da);
+
+/**
  * Count the number of user devices of a specified type
  *
  * @param devtype
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 09b875a..e9ae497 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -205,6 +205,7 @@ DPDK_17.08 {
 	rte_bus_find;
 	rte_bus_find_by_device;
 	rte_bus_find_by_name;
+	rte_eal_devargs_clone;
 	rte_eal_devargs_parse;
 
 } DPDK_17.05;
-- 
2.1.4