[PATCH v5 15/16] examples: pack structures when building with MSVC

[Andre Muezerie]

From: Tyler Retzlaff <roretzla at linux.microsoft.com>

Add __rte_msvc_pack to all __rte_packed structs to cause packing
when building with MSVC.

Remove __rte_packed where it appears natural alignment without
packing would produce the same layout or the struct is internal.

Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
---
 examples/common/neon/port_group.h |  1 +
 examples/ip_pipeline/cli.c        | 10 +++++-----
 examples/ipsec-secgw/ipsec.h      |  1 +
 examples/l3fwd-power/main.c       |  4 +++-
 examples/l3fwd/l3fwd_route.h      |  2 ++
 examples/ptpclient/ptpclient.c    |  8 ++++++++
 examples/vhost_blk/blk_spec.h     |  1 +
 7 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/examples/common/neon/port_group.h b/examples/common/neon/port_group.h
index 421e2e8613..bd40590418 100644
--- a/examples/common/neon/port_group.h
+++ b/examples/common/neon/port_group.h
@@ -21,6 +21,7 @@ static inline uint16_t *
 port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, uint16x8_t dp1,
 		  uint16x8_t dp2)
 {
+	__rte_msvc_pack
 	union {
 		uint16_t u16[FWDSTEP + 1];
 		uint64_t u64;
diff --git a/examples/ip_pipeline/cli.c b/examples/ip_pipeline/cli.c
index 92dfacdeb0..766fc8e46e 100644
--- a/examples/ip_pipeline/cli.c
+++ b/examples/ip_pipeline/cli.c
@@ -2571,7 +2571,7 @@ struct pkt_key_qinq {
 	uint16_t svlan;
 	uint16_t ethertype_cvlan;
 	uint16_t cvlan;
-} __rte_packed;
+};
 
 struct pkt_key_ipv4_5tuple {
 	uint8_t time_to_live;
@@ -2581,7 +2581,7 @@ struct pkt_key_ipv4_5tuple {
 	uint32_t da;
 	uint16_t sp;
 	uint16_t dp;
-} __rte_packed;
+};
 
 struct pkt_key_ipv6_5tuple {
 	uint16_t payload_length;
@@ -2591,15 +2591,15 @@ struct pkt_key_ipv6_5tuple {
 	struct rte_ipv6_addr da;
 	uint16_t sp;
 	uint16_t dp;
-} __rte_packed;
+};
 
 struct pkt_key_ipv4_addr {
 	uint32_t addr;
-} __rte_packed;
+};
 
 struct pkt_key_ipv6_addr {
 	struct rte_ipv6_addr addr;
-} __rte_packed;
+};
 
 static uint32_t
 parse_match(char **tokens,
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index f12f57e2d5..dc146bccb8 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -274,6 +274,7 @@ struct socket_ctx {
 	struct rte_mempool *session_pool;
 };
 
+__rte_msvc_pack
 struct cnt_blk {
 	uint32_t salt;
 	uint64_t iv;
diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index ae8b55924e..ce3c901b45 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -282,7 +282,8 @@ static struct rte_mempool * pktmbuf_pool[NB_SOCKETS];
 #define DEFAULT_HASH_FUNC       rte_jhash
 #endif
 
-struct ipv4_5tuple {
+__rte_msvc_pack
+__rte_msvc_packstruct ipv4_5tuple {
 	uint32_t ip_dst;
 	uint32_t ip_src;
 	uint16_t port_dst;
@@ -290,6 +291,7 @@ struct ipv4_5tuple {
 	uint8_t  proto;
 } __rte_packed;
 
+__rte_msvc_pack
 struct ipv6_5tuple {
 	uint8_t  ip_dst[IPV6_ADDR_LEN];
 	uint8_t  ip_src[IPV6_ADDR_LEN];
diff --git a/examples/l3fwd/l3fwd_route.h b/examples/l3fwd/l3fwd_route.h
index 62263c3540..8c7be4b9d6 100644
--- a/examples/l3fwd/l3fwd_route.h
+++ b/examples/l3fwd/l3fwd_route.h
@@ -36,6 +36,7 @@ struct ipv6_l3fwd_route {
 	uint8_t if_out;
 };
 
+__rte_msvc_pack
 struct ipv4_5tuple {
 	uint32_t ip_dst;
 	uint32_t ip_src;
@@ -44,6 +45,7 @@ struct ipv4_5tuple {
 	uint8_t  proto;
 } __rte_packed;
 
+__rte_msvc_pack
 struct ipv6_5tuple {
 	uint8_t  ip_dst[IPV6_ADDR_LEN];
 	uint8_t  ip_src[IPV6_ADDR_LEN];
diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
index 23fa487081..d7caad41d3 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -85,6 +85,7 @@ static const struct rte_ether_addr ether_multicast = {
 };
 
 /* Structs used for PTP handling. */
+__rte_msvc_pack
 struct tstamp {
 	uint16_t   sec_msb;
 	uint32_t   sec_lsb;
@@ -95,11 +96,13 @@ struct clock_id {
 	uint8_t id[8];
 };
 
+__rte_msvc_pack
 struct port_id {
 	struct clock_id        clock_id;
 	uint16_t               port_number;
 }  __rte_packed;
 
+__rte_msvc_pack
 struct ptp_header {
 	uint8_t              msg_type;
 	uint8_t              ver;
@@ -115,22 +118,26 @@ struct ptp_header {
 	int8_t               log_message_interval;
 } __rte_packed;
 
+__rte_msvc_pack
 struct sync_msg {
 	struct ptp_header   hdr;
 	struct tstamp       origin_tstamp;
 } __rte_packed;
 
+__rte_msvc_pack
 struct follow_up_msg {
 	struct ptp_header   hdr;
 	struct tstamp       precise_origin_tstamp;
 	uint8_t             suffix[];
 } __rte_packed;
 
+__rte_msvc_pack
 struct delay_req_msg {
 	struct ptp_header   hdr;
 	struct tstamp       origin_tstamp;
 } __rte_packed;
 
+__rte_msvc_pack
 struct delay_resp_msg {
 	struct ptp_header    hdr;
 	struct tstamp        rx_tstamp;
@@ -139,6 +146,7 @@ struct delay_resp_msg {
 } __rte_packed;
 
 struct ptp_message {
+	__rte_msvc_pack
 	union {
 		struct ptp_header          header;
 		struct sync_msg            sync;
diff --git a/examples/vhost_blk/blk_spec.h b/examples/vhost_blk/blk_spec.h
index 3c54f70eaf..3dc0681551 100644
--- a/examples/vhost_blk/blk_spec.h
+++ b/examples/vhost_blk/blk_spec.h
@@ -73,6 +73,7 @@ struct vhost_memory_padded {
 	struct vhost_memory_region regions[VHOST_USER_MEMORY_MAX_NREGIONS];
 };
 
+__rte_msvc_pack
 struct vhost_user_msg {
 	enum vhost_user_request request;
 
-- 
2.47.0.vfs.0.3