diff mbox series

[net-next,1/2] net/sched: cls_flower: use ntohs for struct flow_dissector_key_ports

Message ID 20210321210549.3234265-1-olteanv@gmail.com (mailing list archive)
State Accepted
Commit 6215afcb9a7e35cef334dc0ae7f998cc72c8465f
Delegated to: Netdev Maintainers
Headers show
Series [net-next,1/2] net/sched: cls_flower: use ntohs for struct flow_dissector_key_ports | expand

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netdev/build_32bit success Errors and warnings before: 88 this patch: 12
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Commit Message

Vladimir Oltean March 21, 2021, 9:05 p.m. UTC 
From: Vladimir Oltean <vladimir.oltean@nxp.com>

A make W=1 build complains that:

net/sched/cls_flower.c:214:20: warning: cast from restricted __be16
net/sched/cls_flower.c:214:20: warning: incorrect type in argument 1 (different base types)
net/sched/cls_flower.c:214:20:    expected unsigned short [usertype] val
net/sched/cls_flower.c:214:20:    got restricted __be16 [usertype] dst

This is because we use htons on struct flow_dissector_key_ports members
src and dst, which are defined as __be16, so they are already in network
byte order, not host. The byte swap function for the other direction
should have been used.

Because htons and ntohs do the same thing (either both swap, or none
does), this change has no functional effect except to silence the
warnings.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 net/sched/cls_flower.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org March 22, 2021, 8 p.m. UTC | #1 
Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Sun, 21 Mar 2021 23:05:48 +0200 you wrote:
> From: Vladimir Oltean <vladimir.oltean@nxp.com>
> 
> A make W=1 build complains that:
> 
> net/sched/cls_flower.c:214:20: warning: cast from restricted __be16
> net/sched/cls_flower.c:214:20: warning: incorrect type in argument 1 (different base types)
> net/sched/cls_flower.c:214:20:    expected unsigned short [usertype] val
> net/sched/cls_flower.c:214:20:    got restricted __be16 [usertype] dst
> 
> [...]

Here is the summary with links:
  - [net-next,1/2] net/sched: cls_flower: use ntohs for struct flow_dissector_key_ports
    https://git.kernel.org/netdev/net-next/c/6215afcb9a7e
  - [net-next,2/2] net/sched: cls_flower: use nla_get_be32 for TCA_FLOWER_KEY_FLAGS
    https://git.kernel.org/netdev/net-next/c/abee13f53e88

You are awesome, thank you!
--
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diff mbox series

Patch

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index d097b5c15faa..832a0ece6dbf 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -209,16 +209,16 @@  static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
 				  struct fl_flow_key *key,
 				  struct fl_flow_key *mkey)
 {
-	__be16 min_mask, max_mask, min_val, max_val;
+	u16 min_mask, max_mask, min_val, max_val;
 
-	min_mask = htons(filter->mask->key.tp_range.tp_min.dst);
-	max_mask = htons(filter->mask->key.tp_range.tp_max.dst);
-	min_val = htons(filter->key.tp_range.tp_min.dst);
-	max_val = htons(filter->key.tp_range.tp_max.dst);
+	min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst);
+	max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst);
+	min_val = ntohs(filter->key.tp_range.tp_min.dst);
+	max_val = ntohs(filter->key.tp_range.tp_max.dst);
 
 	if (min_mask && max_mask) {
-		if (htons(key->tp_range.tp.dst) < min_val ||
-		    htons(key->tp_range.tp.dst) > max_val)
+		if (ntohs(key->tp_range.tp.dst) < min_val ||
+		    ntohs(key->tp_range.tp.dst) > max_val)
 			return false;
 
 		/* skb does not have min and max values */
@@ -232,16 +232,16 @@  static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
 				  struct fl_flow_key *key,
 				  struct fl_flow_key *mkey)
 {
-	__be16 min_mask, max_mask, min_val, max_val;
+	u16 min_mask, max_mask, min_val, max_val;
 
-	min_mask = htons(filter->mask->key.tp_range.tp_min.src);
-	max_mask = htons(filter->mask->key.tp_range.tp_max.src);
-	min_val = htons(filter->key.tp_range.tp_min.src);
-	max_val = htons(filter->key.tp_range.tp_max.src);
+	min_mask = ntohs(filter->mask->key.tp_range.tp_min.src);
+	max_mask = ntohs(filter->mask->key.tp_range.tp_max.src);
+	min_val = ntohs(filter->key.tp_range.tp_min.src);
+	max_val = ntohs(filter->key.tp_range.tp_max.src);
 
 	if (min_mask && max_mask) {
-		if (htons(key->tp_range.tp.src) < min_val ||
-		    htons(key->tp_range.tp.src) > max_val)
+		if (ntohs(key->tp_range.tp.src) < min_val ||
+		    ntohs(key->tp_range.tp.src) > max_val)
 			return false;
 
 		/* skb does not have min and max values */
@@ -783,16 +783,16 @@  static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
 		       TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
 
 	if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
-	    htons(key->tp_range.tp_max.dst) <=
-	    htons(key->tp_range.tp_min.dst)) {
+	    ntohs(key->tp_range.tp_max.dst) <=
+	    ntohs(key->tp_range.tp_min.dst)) {
 		NL_SET_ERR_MSG_ATTR(extack,
 				    tb[TCA_FLOWER_KEY_PORT_DST_MIN],
 				    "Invalid destination port range (min must be strictly smaller than max)");
 		return -EINVAL;
 	}
 	if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
-	    htons(key->tp_range.tp_max.src) <=
-	    htons(key->tp_range.tp_min.src)) {
+	    ntohs(key->tp_range.tp_max.src) <=
+	    ntohs(key->tp_range.tp_min.src)) {
 		NL_SET_ERR_MSG_ATTR(extack,
 				    tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
 				    "Invalid source port range (min must be strictly smaller than max)");