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[v9,22/30] examples/l3fwd: replace packed attributes

Message ID 1736383715-31703-23-git-send-email-andremue@linux.microsoft.com (mailing list archive)
State Superseded
Delegated to: Thomas Monjalon
Headers
Series fix packing of structs when building with MSVC |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Andre Muezerie Jan. 9, 2025, 12:48 a.m. UTC 
MSVC struct packing is not compatible with GCC. Replace macro
__rte_packed with __rte_packed_begin to push existing pack value
and set packing to 1-byte and macro __rte_packed_end to restore
the pack value prior to the push.

Macro __rte_packed_end is deliberately utilized to trigger a
MSVC compiler warning if no existing packing has been pushed allowing
easy identification of locations where the __rte_packed_begin is
missing.

Signed-off-by: Andre Muezerie <andremue@linux.microsoft.com>
---
 examples/l3fwd/l3fwd_route.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/examples/l3fwd/l3fwd_route.h b/examples/l3fwd/l3fwd_route.h
index 62263c3540..b02b9cc11c 100644
--- a/examples/l3fwd/l3fwd_route.h
+++ b/examples/l3fwd/l3fwd_route.h
@@ -36,21 +36,21 @@  struct ipv6_l3fwd_route {
 	uint8_t if_out;
 };
 
-struct ipv4_5tuple {
+struct __rte_packed_begin ipv4_5tuple {
 	uint32_t ip_dst;
 	uint32_t ip_src;
 	uint16_t port_dst;
 	uint16_t port_src;
 	uint8_t  proto;
-} __rte_packed;
+} __rte_packed_end;
 
-struct ipv6_5tuple {
+struct __rte_packed_begin ipv6_5tuple {
 	uint8_t  ip_dst[IPV6_ADDR_LEN];
 	uint8_t  ip_src[IPV6_ADDR_LEN];
 	uint16_t port_dst;
 	uint16_t port_src;
 	uint8_t  proto;
-} __rte_packed;
+} __rte_packed_end;
 
 struct lpm_route_rule {
 	union {