diff options
Diffstat (limited to 'net/ipv4/nexthop.c')
| -rw-r--r-- | net/ipv4/nexthop.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 1c4f10fe3b4e..7ae197efa5a9 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -2066,9 +2066,23 @@ static int nh_valid_dump_req(const struct nlmsghdr *nlh, return __nh_valid_dump_req(nlh, tb, filter, cb->extack); } +struct rtm_dump_nh_ctx { + u32 idx; +}; + +static struct rtm_dump_nh_ctx * +rtm_dump_nh_ctx(struct netlink_callback *cb) +{ + struct rtm_dump_nh_ctx *ctx = (void *)cb->ctx; + + BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); + return ctx; +} + /* rtnl */ static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb) { + struct rtm_dump_nh_ctx *ctx = rtm_dump_nh_ctx(cb); struct nhmsg *nhm = nlmsg_data(cb->nlh); struct net *net = sock_net(skb->sk); struct rb_root *root = &net->nexthop.rb_root; @@ -2081,7 +2095,7 @@ static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb) if (err < 0) return err; - s_idx = cb->args[0]; + s_idx = ctx->idx; for (node = rb_first(root); node; node = rb_next(node)) { struct nexthop *nh; @@ -2108,7 +2122,7 @@ cont: out: err = skb->len; out_err: - cb->args[0] = idx; + ctx->idx = idx; cb->seq = net->nexthop.seq; nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |