[PATCH v2 15/15] examples: pack structures when building with MSVC

From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Akhil Goyal <gakhil@marvell.com>,
	Aman Singh <aman.deep.singh@intel.com>,
	Anatoly Burakov <anatoly.burakov@intel.com>,
	Bruce Richardson <bruce.richardson@intel.com>,
	Byron Marohn <byron.marohn@intel.com>,
	Conor Walsh <conor.walsh@intel.com>,
	Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
	Dariusz Sosnowski <dsosnowski@nvidia.com>,
	David Hunt <david.hunt@intel.com>,
	Jerin Jacob <jerinj@marvell.com>,
	Jingjing Wu <jingjing.wu@intel.com>,
	Kirill Rybalchenko <kirill.rybalchenko@intel.com>,
	Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>,
	Matan Azrad <matan@nvidia.com>, Ori Kam <orika@nvidia.com>,
	Radu Nicolau <radu.nicolau@intel.com>,
	Ruifeng Wang <ruifeng.wang@arm.com>,
	Sameh Gobriel <sameh.gobriel@intel.com>,
	Sivaprasad Tummala <sivaprasad.tummala@amd.com>,
	Suanming Mou <suanmingm@nvidia.com>,
	Sunil Kumar Kori <skori@marvell.com>,
	Vamsi Attunuru <vattunuru@marvell.com>,
	Viacheslav Ovsiienko <viacheslavo@nvidia.com>,
	Vladimir Medvedkin <vladimir.medvedkin@intel.com>,
	Yipeng Wang <yipeng1.wang@intel.com>,
	Yuying Zhang <Yuying.Zhang@intel.com>,
	Yuying Zhang <yuying.zhang@intel.com>,
	Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH v2 15/15] examples: pack structures when building with MSVC
Date: Wed, 27 Mar 2024 16:09:18 -0700	[thread overview]
Message-ID: <1711580958-20808-16-git-send-email-roretzla@linux.microsoft.com> (raw)
In-Reply-To: <1711580958-20808-1-git-send-email-roretzla@linux.microsoft.com>

Add __rte_msvc_pushpack(1) 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@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       |  2 ++
 examples/ptpclient/ptpclient.c    |  8 ++++++++
 5 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/examples/common/neon/port_group.h b/examples/common/neon/port_group.h
index 421e2e8..bd40590 100644
--- a/examples/common/neon/port_group.h
+++ b/examples/common/neon/port_group.h
@@ -21,6 +21,7 @@
 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 e8269ea..aad6c78 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 {
 	uint8_t da[16];
 	uint16_t sp;
 	uint16_t dp;
-} __rte_packed;
+};
 
 struct pkt_key_ipv4_addr {
 	uint32_t addr;
-} __rte_packed;
+};
 
 struct pkt_key_ipv6_addr {
 	uint8_t addr[16];
-} __rte_packed;
+};
 
 static uint32_t
 parse_match(char **tokens,
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index bdcada1..bdc6045 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -277,6 +277,7 @@ 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 f4adcf4..a3be37b 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -278,6 +278,7 @@ struct lcore_rx_queue {
 #define DEFAULT_HASH_FUNC       rte_jhash
 #endif
 
+__rte_msvc_pack
 struct ipv4_5tuple {
 	uint32_t ip_dst;
 	uint32_t ip_src;
@@ -286,6 +287,7 @@ 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 afb61bb..cdd73fd 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -56,6 +56,7 @@
 };
 
 /* Structs used for PTP handling. */
+__rte_msvc_pack
 struct tstamp {
 	uint16_t   sec_msb;
 	uint32_t   sec_lsb;
@@ -66,11 +67,13 @@ 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;
@@ -86,22 +89,26 @@ 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;
@@ -110,6 +117,7 @@ struct delay_resp_msg {
 } __rte_packed;
 
 struct ptp_message {
+	__rte_msvc_pack
 	union {
 		struct ptp_header          header;
 		struct sync_msg            sync;
-- 
1.8.3.1

