mbuf: enforce no option for dynamic fields and flags

As stated in the API, dynamic field and flags should be created with no
additional flag (simply in the API for future changes).

Fix the dynamic flag register helper which was not enforcing it and add
unit tests.

Fixes: 4958ca3a443a ("mbuf: support dynamic fields and flags")

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: Ray Kinsella <mdr@ashroe.eu>

diff --git a/app/test/test_mbuf.c b/app/test/test_mbuf.c
index 9a248df..8277710 100644 (file)
--- a/app/test/test_mbuf.c
+++ b/app/test/test_mbuf.c
@@ -2577,6 +2577,16 @@ test_mbuf_dyn(struct rte_mempool *pktmbuf_pool)
                .align = 3,
                .flags = 0,
        };
+       const struct rte_mbuf_dynfield dynfield_fail_flag = {
+               .name = "test-dynfield",
+               .size = sizeof(uint8_t),
+               .align = __alignof__(uint8_t),
+               .flags = 1,
+       };
+       const struct rte_mbuf_dynflag dynflag_fail_flag = {
+               .name = "test-dynflag",
+               .flags = 1,
+       };
        const struct rte_mbuf_dynflag dynflag = {
                .name = "test-dynflag",
                .flags = 0,
@@ -2638,6 +2648,14 @@ test_mbuf_dyn(struct rte_mempool *pktmbuf_pool)
        if (ret != -1)
                GOTO_FAIL("dynamic field creation should fail (not avail)");
 
+       ret = rte_mbuf_dynfield_register(&dynfield_fail_flag);
+       if (ret != -1)
+               GOTO_FAIL("dynamic field creation should fail (invalid flag)");
+
+       ret = rte_mbuf_dynflag_register(&dynflag_fail_flag);
+       if (ret != -1)
+               GOTO_FAIL("dynamic flag creation should fail (invalid flag)");
+
        flag = rte_mbuf_dynflag_register(&dynflag);
        if (flag == -1)
                GOTO_FAIL("failed to register dynamic flag, flag=%d: %s",

diff --git a/lib/mbuf/rte_mbuf_dyn.c b/lib/mbuf/rte_mbuf_dyn.c
index ca46eb2..d55e162 100644 (file)
--- a/lib/mbuf/rte_mbuf_dyn.c
+++ b/lib/mbuf/rte_mbuf_dyn.c
@@ -498,6 +498,10 @@ rte_mbuf_dynflag_register_bitnum(const struct rte_mbuf_dynflag *params,
 {
        int ret;
 
+       if (params->flags != 0) {
+               rte_errno = EINVAL;
+               return -1;
+       }
        if (req >= RTE_SIZEOF_FIELD(struct rte_mbuf, ol_flags) * CHAR_BIT &&
                        req != UINT_MAX) {
                rte_errno = EINVAL;