[PATCH 6.12 051/466] mlxsw: spectrum_acl_flex_keys: Constify struct mlxsw_afk_element_inst

12 Dec 2024

6.12-stable review patch.  If anyone has any objections, please let me know.
------------------
From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ Upstream commit bec2a32145d5cc066df29182fa0e5b0d4329b1a1 ]
'struct mlxsw_afk_element_inst' are not modified in these drivers.
Constifying these structures moves some data to a read-only section, so
increases overall security.
Update a few functions and struct mlxsw_afk_block accordingly.
On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   4278	   4032	      0	   8310	   2076	drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.o
After:
=====
   text	   data	    bss	    dec	    hex	filename
   7934	    352	      0	   8286	   205e	drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.o
Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr
Reviewed-by: Simon Horman horms@kernel.org
Reviewed-by: Ido Schimmel idosch@nvidia.com
Link: https://patch.msgid.link/8ccfc7bfb2365dcee5b03c81ebe061a927d6da2e.1727541677...
Signed-off-by: Jakub Kicinski kuba@kernel.org
Stable-dep-of: 217bbf156f93 ("mlxsw: spectrum_acl_flex_keys: Use correct key block on Spectrum-4")
Signed-off-by: Sasha Levin sashal@kernel.org
---
 .../mellanox/mlxsw/core_acl_flex_keys.c       |  6 +-
 .../mellanox/mlxsw/core_acl_flex_keys.h       |  2 +-
 .../mellanox/mlxsw/spectrum_acl_flex_keys.c   | 66 +++++++++----------
 3 files changed, 37 insertions(+), 37 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c
index 947500f8ed714..7aa1a462a1035 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c
@@ -67,7 +67,7 @@ static bool mlxsw_afk_blocks_check(struct mlxsw_afk *mlxsw_afk)
for (j = 0; j < block->instances_count; j++) {
    		const struct mlxsw_afk_element_info *elinfo;
-			struct mlxsw_afk_element_inst *elinst;
+			const struct mlxsw_afk_element_inst *elinst;
elinst = &block->instances[j];
    		elinfo = &mlxsw_afk_element_infos[elinst->element];
@@ -154,7 +154,7 @@ static void mlxsw_afk_picker_count_hits(struct mlxsw_afk *mlxsw_afk,
    	const struct mlxsw_afk_block *block = &mlxsw_afk->blocks[i];
for (j = 0; j < block->instances_count; j++) {
-			struct mlxsw_afk_element_inst *elinst;
+			const struct mlxsw_afk_element_inst *elinst;
elinst = &block->instances[j];
    		if (elinst->element == element) {
@@ -386,7 +386,7 @@ mlxsw_afk_block_elinst_get(const struct mlxsw_afk_block *block,
    int i;
for (i = 0; i < block->instances_count; i++) {
-		struct mlxsw_afk_element_inst *elinst;
+		const struct mlxsw_afk_element_inst *elinst;
elinst = &block->instances[i];
    	if (elinst->element == element)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.h b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.h
index 98a05598178b3..5aa1afb3f2ca8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.h
@@ -117,7 +117,7 @@ struct mlxsw_afk_element_inst { /* element instance in actual block */
struct mlxsw_afk_block {
    u16 encoding; /* block ID */
-	struct mlxsw_afk_element_inst *instances;
+	const struct mlxsw_afk_element_inst *instances;
    unsigned int instances_count;
    bool high_entropy;
 };
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.c
index eaad786056027..6fe185ea6732c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_keys.c
@@ -7,7 +7,7 @@
 #include "item.h"
 #include "core_acl_flex_keys.h"
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_dmac[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_dmac[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(DMAC_32_47, 0x00, 2),
    MLXSW_AFK_ELEMENT_INST_BUF(DMAC_0_31, 0x02, 4),
    MLXSW_AFK_ELEMENT_INST_U32(PCP, 0x08, 13, 3),
@@ -15,7 +15,7 @@ static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_dmac[] = {
    MLXSW_AFK_ELEMENT_INST_U32(SRC_SYS_PORT, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_smac[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_smac[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_32_47, 0x00, 2),
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_0_31, 0x02, 4),
    MLXSW_AFK_ELEMENT_INST_U32(PCP, 0x08, 13, 3),
@@ -23,27 +23,27 @@ static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_smac[] = {
    MLXSW_AFK_ELEMENT_INST_U32(SRC_SYS_PORT, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_smac_ex[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l2_smac_ex[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_32_47, 0x02, 2),
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_0_31, 0x04, 4),
    MLXSW_AFK_ELEMENT_INST_U32(ETHERTYPE, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_sip[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_sip[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_0_31, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_U32(L4_PORT_RANGE, 0x04, 16, 16),
    MLXSW_AFK_ELEMENT_INST_U32(IP_PROTO, 0x08, 0, 8),
    MLXSW_AFK_ELEMENT_INST_U32(SRC_SYS_PORT, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_dip[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_dip[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_0_31, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_U32(L4_PORT_RANGE, 0x04, 16, 16),
    MLXSW_AFK_ELEMENT_INST_U32(IP_PROTO, 0x08, 0, 8),
    MLXSW_AFK_ELEMENT_INST_U32(SRC_SYS_PORT, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_0_31, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_U32(IP_ECN, 0x04, 4, 2),
    MLXSW_AFK_ELEMENT_INST_U32(IP_TTL_, 0x04, 24, 8),
@@ -51,35 +51,35 @@ static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4[] = {
    MLXSW_AFK_ELEMENT_INST_U32(TCP_FLAGS, 0x08, 8, 9), /* TCP_CONTROL+TCP_ECN */
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_ex[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_ex[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VID, 0x00, 0, 12),
    MLXSW_AFK_ELEMENT_INST_U32(PCP, 0x08, 29, 3),
    MLXSW_AFK_ELEMENT_INST_U32(SRC_L4_PORT, 0x08, 0, 16),
    MLXSW_AFK_ELEMENT_INST_U32(DST_L4_PORT, 0x0C, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_dip[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_dip[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_32_63, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_ex1[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_ex1[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_96_127, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_64_95, 0x04, 4),
    MLXSW_AFK_ELEMENT_INST_U32(IP_PROTO, 0x08, 0, 8),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_sip[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_sip[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_32_63, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_sip_ex[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_sip_ex[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_96_127, 0x00, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_64_95, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_packet_type[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_packet_type[] = {
    MLXSW_AFK_ELEMENT_INST_U32(ETHERTYPE, 0x00, 0, 16),
 };
@@ -124,90 +124,90 @@ const struct mlxsw_afk_ops mlxsw_sp1_afk_ops = {
    .clear_block	= mlxsw_sp1_afk_clear_block,
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_0[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_0[] = {
    MLXSW_AFK_ELEMENT_INST_U32(FDB_MISS, 0x00, 3, 1),
    MLXSW_AFK_ELEMENT_INST_BUF(DMAC_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_1[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_1[] = {
    MLXSW_AFK_ELEMENT_INST_U32(FDB_MISS, 0x00, 3, 1),
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_2[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_2[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SMAC_32_47, 0x04, 2),
    MLXSW_AFK_ELEMENT_INST_BUF(DMAC_32_47, 0x06, 2),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_3[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_3[] = {
    MLXSW_AFK_ELEMENT_INST_U32(PCP, 0x00, 0, 3),
    MLXSW_AFK_ELEMENT_INST_U32(VID, 0x04, 16, 12),
    MLXSW_AFK_ELEMENT_INST_BUF(DMAC_32_47, 0x06, 2),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_4[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_4[] = {
    MLXSW_AFK_ELEMENT_INST_U32(PCP, 0x00, 0, 3),
    MLXSW_AFK_ELEMENT_INST_U32(VID, 0x04, 16, 12),
    MLXSW_AFK_ELEMENT_INST_U32(ETHERTYPE, 0x04, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_5[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_5[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VID, 0x04, 16, 12),
    MLXSW_AFK_ELEMENT_INST_EXT_U32(SRC_SYS_PORT, 0x04, 0, 8, -1, true), /* RX_ACL_SYSTEM_PORT */
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_0[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_0[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_1[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_1[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_0_31, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_2[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_2[] = {
    MLXSW_AFK_ELEMENT_INST_U32(IP_DSCP, 0x04, 0, 6),
    MLXSW_AFK_ELEMENT_INST_U32(IP_ECN, 0x04, 6, 2),
    MLXSW_AFK_ELEMENT_INST_U32(IP_TTL_, 0x04, 8, 8),
    MLXSW_AFK_ELEMENT_INST_U32(IP_PROTO, 0x04, 16, 8),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_5[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_5[] = {
    MLXSW_AFK_ELEMENT_INST_EXT_U32(VIRT_ROUTER, 0x04, 20, 11, 0, true),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_0[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_0[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VIRT_ROUTER_0_3, 0x00, 0, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_32_63, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_1[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_1[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VIRT_ROUTER_4_7, 0x00, 0, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_64_95, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_2[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_2[] = {
    MLXSW_AFK_ELEMENT_INST_EXT_U32(VIRT_ROUTER_MSB, 0x00, 0, 3, 0, true),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_96_127, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_3[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_3[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_32_63, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_4[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_4[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_64_95, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_5[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_5[] = {
    MLXSW_AFK_ELEMENT_INST_BUF(SRC_IP_96_127, 0x04, 4),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l4_0[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l4_0[] = {
    MLXSW_AFK_ELEMENT_INST_U32(SRC_L4_PORT, 0x04, 16, 16),
    MLXSW_AFK_ELEMENT_INST_U32(DST_L4_PORT, 0x04, 0, 16),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l4_2[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_l4_2[] = {
    MLXSW_AFK_ELEMENT_INST_U32(TCP_FLAGS, 0x04, 16, 9), /* TCP_CONTROL + TCP_ECN */
    MLXSW_AFK_ELEMENT_INST_U32(L4_PORT_RANGE, 0x04, 0, 16),
 };
@@ -319,16 +319,16 @@ const struct mlxsw_afk_ops mlxsw_sp2_afk_ops = {
    .clear_block	= mlxsw_sp2_afk_clear_block,
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_5b[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_mac_5b[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VID, 0x04, 18, 12),
    MLXSW_AFK_ELEMENT_INST_EXT_U32(SRC_SYS_PORT, 0x04, 0, 9, -1, true), /* RX_ACL_SYSTEM_PORT */
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_5b[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv4_5b[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VIRT_ROUTER, 0x04, 20, 12),
 };
-static struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_2b[] = {
+static const struct mlxsw_afk_element_inst mlxsw_sp_afk_element_info_ipv6_2b[] = {
    MLXSW_AFK_ELEMENT_INST_U32(VIRT_ROUTER_MSB, 0x00, 0, 4),
    MLXSW_AFK_ELEMENT_INST_BUF(DST_IP_96_127, 0x04, 4),
 };
-- 
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[PATCH 6.12 051/466] mlxsw: spectrum_acl_flex_keys: Constify struct mlxsw_afk_element_inst