From: David Ahern <dsahern@kernel.org>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org,
nikolay@cumulusnetworks.com, David Ahern <dsahern@gmail.com>
Subject: [PATCH net v2 1/5] nexthops: Move code from remove_nexthop_from_groups to remove_nh_grp_entry
Date: Tue, 26 May 2020 12:56:14 -0600 [thread overview]
Message-ID: <20200526185618.43748-2-dsahern@kernel.org> (raw)
In-Reply-To: <20200526185618.43748-1-dsahern@kernel.org>
From: David Ahern <dsahern@gmail.com>
Move nh_grp dereference and check for removing nexthop group due to
all members gone into remove_nh_grp_entry.
Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
---
net/ipv4/nexthop.c | 27 +++++++++++++--------------
1 file changed, 13 insertions(+), 14 deletions(-)
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 715e14475220..b4b772f120a7 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -694,17 +694,21 @@ static void nh_group_rebalance(struct nh_group *nhg)
}
}
-static void remove_nh_grp_entry(struct nh_grp_entry *nhge,
- struct nh_group *nhg,
+static void remove_nh_grp_entry(struct net *net, struct nh_grp_entry *nhge,
struct nl_info *nlinfo)
{
+ struct nexthop *nhp = nhge->nh_parent;
struct nexthop *nh = nhge->nh;
struct nh_grp_entry *nhges;
+ struct nh_group *nhg;
bool found = false;
int i;
WARN_ON(!nh);
+ list_del(&nhge->nh_list);
+
+ nhg = rtnl_dereference(nhp->nh_grp);
nhges = nhg->nh_entries;
for (i = 0; i < nhg->num_nh; ++i) {
if (found) {
@@ -728,7 +732,11 @@ static void remove_nh_grp_entry(struct nh_grp_entry *nhge,
nexthop_put(nh);
if (nlinfo)
- nexthop_notify(RTM_NEWNEXTHOP, nhge->nh_parent, nlinfo);
+ nexthop_notify(RTM_NEWNEXTHOP, nhp, nlinfo);
+
+ /* if this group has no more entries then remove it */
+ if (!nhg->num_nh)
+ remove_nexthop(net, nhp, nlinfo);
}
static void remove_nexthop_from_groups(struct net *net, struct nexthop *nh,
@@ -736,17 +744,8 @@ static void remove_nexthop_from_groups(struct net *net, struct nexthop *nh,
{
struct nh_grp_entry *nhge, *tmp;
- list_for_each_entry_safe(nhge, tmp, &nh->grp_list, nh_list) {
- struct nh_group *nhg;
-
- list_del(&nhge->nh_list);
- nhg = rtnl_dereference(nhge->nh_parent->nh_grp);
- remove_nh_grp_entry(nhge, nhg, nlinfo);
-
- /* if this group has no more entries then remove it */
- if (!nhg->num_nh)
- remove_nexthop(net, nhge->nh_parent, nlinfo);
- }
+ list_for_each_entry_safe(nhge, tmp, &nh->grp_list, nh_list)
+ remove_nh_grp_entry(net, nhge, nlinfo);
}
static void remove_nexthop_group(struct nexthop *nh, struct nl_info *nlinfo)
--
2.21.1 (Apple Git-122.3)
next prev parent reply other threads:[~2020-05-26 19:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-26 18:56 [PATCH net v2 0/5] nexthops: Fix 2 fundamental flaws with nexthop groups David Ahern
2020-05-26 18:56 ` David Ahern [this message]
2020-05-26 18:56 ` [PATCH net v2 2/5] nexthops: don't modify published " David Ahern
2020-05-26 18:56 ` [PATCH net v2 3/5] nexthop: Expand nexthop_is_multipath in a few places David Ahern
2020-05-26 18:56 ` [PATCH net v2 4/5] ipv4: Refactor nhc evaluation in fib_table_lookup David Ahern
2020-05-26 18:56 ` [PATCH net v2 5/5] ipv4: nexthop version of fib_info_nh_uses_dev David Ahern
2020-05-26 23:07 ` [PATCH net v2 0/5] nexthops: Fix 2 fundamental flaws with nexthop groups David Miller
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