[dpdk-dev] [PATCH v3 5/5] test: add segment fd API test

[Anatoly Burakov <anatoly.burakov@intel.com>]

Use memory autotest to also test segment fd API. This will not do
any checks - just see if the relevant API's return success or
indicate that the API is not supported.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Tiwei Bie <tiwei.bie@intel.com>
---
 test/test/test_memory.c | 43 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/test/test/test_memory.c b/test/test/test_memory.c
index b96bca771..3da803e4e 100644
--- a/test/test/test_memory.c
+++ b/test/test/test_memory.c
@@ -37,10 +37,44 @@ check_mem(const struct rte_memseg_list *msl __rte_unused,
 	return 0;
 }
 
+static int
+check_seg_fds(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
+		void *arg __rte_unused)
+{
+	size_t offset;
+	int ret;
+
+	/* skip external segments */
+	if (msl->external)
+		return 0;
+
+	/* try segment fd first. we're in a callback, so thread-unsafe */
+	ret = rte_memseg_get_fd_thread_unsafe(ms);
+	if (ret < 0) {
+		/* ENOTSUP means segment is valid, but there is not support for
+		 * segment fd API (e.g. on FreeBSD).
+		 */
+		if (errno == ENOTSUP)
+			return 1;
+		/* all other errors are treated as failures */
+		return -1;
+	}
+
+	/* we're able to get memseg fd - try getting its offset */
+	ret = rte_memseg_get_fd_offset_thread_unsafe(ms, &offset);
+	if (ret < 0) {
+		if (errno == ENOTSUP)
+			return 1;
+		return -1;
+	}
+	return 0;
+}
+
 static int
 test_memory(void)
 {
 	uint64_t s;
+	int ret;
 
 	/*
 	 * dump the mapped memory: the python-expect script checks
@@ -59,6 +93,15 @@ test_memory(void)
 	/* try to read memory (should not segfault) */
 	rte_memseg_walk(check_mem, NULL);
 
+	/* check segment fd support */
+	ret = rte_memseg_walk(check_seg_fds, NULL);
+	if (ret == 1) {
+		printf("Segment fd API is unsupported\n");
+	} else if (ret == -1) {
+		printf("Error getting segment fd's\n");
+		return -1;
+	}
+
 	return 0;
 }
 
-- 
2.17.1