mirror of https://gitee.com/openkylin/linux.git
bpf, sockmap: Check skb_verdict and skb_parser programs explicitly
We are about to allow skb_verdict to run without skb_parser programs as a first step change code to check each program type specifically. This should be a mechanical change without any impact to actual result. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/160239294756.8495.5796595770890272219.stgit@john-Precision-5820-Tower
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@ -230,16 +230,16 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs,
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{
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struct bpf_prog *msg_parser, *skb_parser, *skb_verdict;
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struct sk_psock *psock;
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bool skb_progs;
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int ret;
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skb_verdict = READ_ONCE(progs->skb_verdict);
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skb_parser = READ_ONCE(progs->skb_parser);
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skb_progs = skb_parser && skb_verdict;
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if (skb_progs) {
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if (skb_verdict) {
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skb_verdict = bpf_prog_inc_not_zero(skb_verdict);
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if (IS_ERR(skb_verdict))
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return PTR_ERR(skb_verdict);
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}
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if (skb_parser) {
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skb_parser = bpf_prog_inc_not_zero(skb_parser);
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if (IS_ERR(skb_parser)) {
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bpf_prog_put(skb_verdict);
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@ -264,7 +264,8 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs,
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if (psock) {
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if ((msg_parser && READ_ONCE(psock->progs.msg_parser)) ||
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(skb_progs && READ_ONCE(psock->progs.skb_parser))) {
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(skb_parser && READ_ONCE(psock->progs.skb_parser)) ||
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(skb_verdict && READ_ONCE(psock->progs.skb_verdict))) {
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sk_psock_put(sk, psock);
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ret = -EBUSY;
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goto out_progs;
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@ -285,7 +286,7 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs,
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goto out_drop;
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write_lock_bh(&sk->sk_callback_lock);
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if (skb_progs && !psock->parser.enabled) {
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if (skb_parser && skb_verdict && !psock->parser.enabled) {
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ret = sk_psock_init_strp(sk, psock);
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if (ret) {
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write_unlock_bh(&sk->sk_callback_lock);
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@ -303,10 +304,10 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs,
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if (msg_parser)
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bpf_prog_put(msg_parser);
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out:
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if (skb_progs) {
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if (skb_verdict)
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bpf_prog_put(skb_verdict);
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if (skb_parser)
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bpf_prog_put(skb_parser);
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}
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return ret;
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}
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