diff mbox series

[net-next,08/12] nexthop: Extract a common helper for parsing dump attributes

Message ID abc4e50cfa17069b15644755da69bf7c1f47855d.1611836479.git.petrm@nvidia.com (mailing list archive)
State Accepted
Commit b9ebea127661e8982c03065d99422dbf0f73e4d1
Delegated to: Netdev Maintainers
Headers show
Series nexthop: Preparations for resilient next-hop groups | expand

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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 47 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
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netdev/stable success Stable not CCed

Commit Message

Petr Machata Jan. 28, 2021, 12:49 p.m. UTC
Requests to dump nexthops have many attributes in common with those that
requests to dump buckets of resilient NH groups will have. However, they
have different policies. To allow reuse of this code, extract a
policy-agnostic wrapper out of nh_valid_dump_req(), and convert this
function into a thin wrapper around it.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
---
 net/ipv4/nexthop.c | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

Comments

David Ahern Jan. 29, 2021, 3:17 a.m. UTC | #1
On 1/28/21 5:49 AM, Petr Machata wrote:
> Requests to dump nexthops have many attributes in common with those that
> requests to dump buckets of resilient NH groups will have. However, they
> have different policies. To allow reuse of this code, extract a
> policy-agnostic wrapper out of nh_valid_dump_req(), and convert this
> function into a thin wrapper around it.
> 
> Signed-off-by: Petr Machata <petrm@nvidia.com>
> Reviewed-by: Ido Schimmel <idosch@nvidia.com>
> ---
>  net/ipv4/nexthop.c | 31 +++++++++++++++++++------------
>  1 file changed, 19 insertions(+), 12 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@kernel.org>
diff mbox series

Patch

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index ad48e5d71bf9..1c4f10fe3b4e 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -2015,22 +2015,13 @@  static bool nh_dump_filtered(struct nexthop *nh,
 	return false;
 }
 
-static int nh_valid_dump_req(const struct nlmsghdr *nlh,
-			     struct nh_dump_filter *filter,
-			     struct netlink_callback *cb)
+static int __nh_valid_dump_req(const struct nlmsghdr *nlh, struct nlattr **tb,
+			       struct nh_dump_filter *filter,
+			       struct netlink_ext_ack *extack)
 {
-	struct netlink_ext_ack *extack = cb->extack;
-	struct nlattr *tb[ARRAY_SIZE(rtm_nh_policy_dump)];
 	struct nhmsg *nhm;
-	int err;
 	u32 idx;
 
-	err = nlmsg_parse(nlh, sizeof(*nhm), tb,
-			  ARRAY_SIZE(rtm_nh_policy_dump) - 1,
-			  rtm_nh_policy_dump, NULL);
-	if (err < 0)
-		return err;
-
 	if (tb[NHA_OIF]) {
 		idx = nla_get_u32(tb[NHA_OIF]);
 		if (idx > INT_MAX) {
@@ -2059,6 +2050,22 @@  static int nh_valid_dump_req(const struct nlmsghdr *nlh,
 	return 0;
 }
 
+static int nh_valid_dump_req(const struct nlmsghdr *nlh,
+			     struct nh_dump_filter *filter,
+			     struct netlink_callback *cb)
+{
+	struct nlattr *tb[ARRAY_SIZE(rtm_nh_policy_dump)];
+	int err;
+
+	err = nlmsg_parse(nlh, sizeof(struct nhmsg), tb,
+			  ARRAY_SIZE(rtm_nh_policy_dump) - 1,
+			  rtm_nh_policy_dump, cb->extack);
+	if (err < 0)
+		return err;
+
+	return __nh_valid_dump_req(nlh, tb, filter, cb->extack);
+}
+
 /* rtnl */
 static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb)
 {