diff mbox series

[net-next,2/7] ipv4: Convert ip_mkroute_input() to dscp_t.

Message ID 6aa71e28f9ff681cbd70847080e1ab6b526f94f1.1728302212.git.gnault@redhat.com (mailing list archive)
State Accepted
Commit 34f28ffd62c14d8b558b3ef0de6c0ebfc5ca0b1a
Delegated to: Netdev Maintainers
Headers show
Series ipv4: Convert __fib_validate_source() and its callers to dscp_t. | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 6 this patch: 6
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 6 this patch: 6
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 5 this patch: 5
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 32 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Guillaume Nault Oct. 7, 2024, 6:24 p.m. UTC 
Pass a dscp_t variable to ip_mkroute_input(), instead of a plain u8, to
prevent accidental setting of ECN bits in ->flowi4_tos.

Only ip_route_input_slow() actually calls ip_mkroute_input(). Since it
already has a dscp_t variable to pass as parameter, we only need to
remove the inet_dscp_to_dsfield() conversion.

While there, reorganise the function parameters to fill up horizontal
space.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
---
 net/ipv4/route.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index ac03916cfcde..38bb38dbe490 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2112,11 +2112,9 @@  int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4,
 }
 #endif /* CONFIG_IP_ROUTE_MULTIPATH */
 
-static int ip_mkroute_input(struct sk_buff *skb,
-			    struct fib_result *res,
-			    struct in_device *in_dev,
-			    __be32 daddr, __be32 saddr, u32 tos,
-			    struct flow_keys *hkeys)
+static int ip_mkroute_input(struct sk_buff *skb, struct fib_result *res,
+			    struct in_device *in_dev, __be32 daddr,
+			    __be32 saddr, dscp_t dscp, struct flow_keys *hkeys)
 {
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
 	if (res->fi && fib_info_num_path(res->fi) > 1) {
@@ -2128,7 +2126,8 @@  static int ip_mkroute_input(struct sk_buff *skb,
 #endif
 
 	/* create a routing cache entry */
-	return __mkroute_input(skb, res, in_dev, daddr, saddr, tos);
+	return __mkroute_input(skb, res, in_dev, daddr, saddr,
+			       inet_dscp_to_dsfield(dscp));
 }
 
 /* Implements all the saddr-related checks as ip_route_input_slow(),
@@ -2315,8 +2314,7 @@  static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 		goto martian_destination;
 
 make_route:
-	err = ip_mkroute_input(skb, res, in_dev, daddr, saddr,
-			       inet_dscp_to_dsfield(dscp), flkeys);
+	err = ip_mkroute_input(skb, res, in_dev, daddr, saddr, dscp, flkeys);
 out:	return err;
 
 brd_input: