diff mbox series

[net-next,v2,2/4] nexthop: Factor out neighbor validity check

Message ID 20230719-nh_select-v2-2-04383e89f868@nvidia.com (mailing list archive)
State Accepted
Commit 4bb5239b43348f4a1cd73f44be3dc57ac653ae9c
Delegated to: Netdev Maintainers
Headers show
Series nexthop: Refactor and fix nexthop selection for multipath routes | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
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: 1345 this patch: 1345
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 1365 this patch: 1365
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: 1368 this patch: 1368
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 48 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Benjamin Poirier July 19, 2023, 1:57 p.m. UTC 
For legacy nexthops, there is fib_good_nh() to check the neighbor validity.
In order to make the nexthop object code more similar to the legacy nexthop
code, factor out the nexthop object neighbor validity check into its own
function.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Benjamin Poirier <bpoirier@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
---
 net/ipv4/nexthop.c | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 27089dea0ed0..c12acbf39659 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -1152,6 +1152,20 @@  static bool ipv4_good_nh(const struct fib_nh *nh)
 	return !!(state & NUD_VALID);
 }
 
+static bool nexthop_is_good_nh(const struct nexthop *nh)
+{
+	struct nh_info *nhi = rcu_dereference(nh->nh_info);
+
+	switch (nhi->family) {
+	case AF_INET:
+		return ipv4_good_nh(&nhi->fib_nh);
+	case AF_INET6:
+		return ipv6_good_nh(&nhi->fib6_nh);
+	}
+
+	return false;
+}
+
 static struct nexthop *nexthop_select_path_fdb(struct nh_group *nhg, int hash)
 {
 	int i;
@@ -1179,26 +1193,15 @@  static struct nexthop *nexthop_select_path_hthr(struct nh_group *nhg, int hash)
 
 	for (i = 0; i < nhg->num_nh; ++i) {
 		struct nh_grp_entry *nhge = &nhg->nh_entries[i];
-		struct nh_info *nhi;
 
 		if (hash > atomic_read(&nhge->hthr.upper_bound))
 			continue;
 
-		nhi = rcu_dereference(nhge->nh->nh_info);
-
 		/* nexthops always check if it is good and does
 		 * not rely on a sysctl for this behavior
 		 */
-		switch (nhi->family) {
-		case AF_INET:
-			if (ipv4_good_nh(&nhi->fib_nh))
-				return nhge->nh;
-			break;
-		case AF_INET6:
-			if (ipv6_good_nh(&nhi->fib6_nh))
-				return nhge->nh;
-			break;
-		}
+		if (nexthop_is_good_nh(nhge->nh))
+			return nhge->nh;
 
 		if (!rc)
 			rc = nhge->nh;