diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2022-07-15 07:22:26 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-18 12:24:10 +0200 |
| commit | 008141de8557479289936e21e7ed6bad50d09443 (patch) | |
| tree | d299e91c578658ed18ddcefaf805674d08587efd /net/tls | |
| parent | tls: rx: allow only one reader at a time (diff) | |
| download | linux-008141de8557479289936e21e7ed6bad50d09443.tar.xz linux-008141de8557479289936e21e7ed6bad50d09443.zip | |
tls: rx: don't try to keep the skbs always on the list
I thought that having the skb either always on the ctx->rx_list
or ctx->recv_pkt will simplify the handling, as we would not
have to remember to flip it from one to the other on exit paths.
This became a little harder to justify with the fix for BPF
sockmaps. Subsequent changes will make the situation even worse.
Queue the skbs only when really needed.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
| -rw-r--r-- | net/tls/tls_sw.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 761a63751616..acf65992aaca 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -1861,8 +1861,11 @@ int tls_sw_recvmsg(struct sock *sk, if (psock) { chunk = sk_msg_recvmsg(sk, psock, msg, len, flags); - if (chunk > 0) - goto leave_on_list; + if (chunk > 0) { + decrypted += chunk; + len -= chunk; + continue; + } } goto recv_end; } @@ -1908,14 +1911,14 @@ int tls_sw_recvmsg(struct sock *sk, ctx->recv_pkt = NULL; __strp_unpause(&ctx->strp); - __skb_queue_tail(&ctx->rx_list, skb); if (async) { /* TLS 1.2-only, to_decrypt must be text length */ chunk = min_t(int, to_decrypt, len); -leave_on_list: +put_on_rx_list: decrypted += chunk; len -= chunk; + __skb_queue_tail(&ctx->rx_list, skb); continue; } /* TLS 1.3 may have updated the length by more than overhead */ @@ -1925,8 +1928,6 @@ leave_on_list: bool partially_consumed = chunk > len; if (bpf_strp_enabled) { - /* BPF may try to queue the skb */ - __skb_unlink(skb, &ctx->rx_list); err = sk_psock_tls_strp_read(psock, skb); if (err != __SK_PASS) { rxm->offset = rxm->offset + rxm->full_len; @@ -1935,7 +1936,6 @@ leave_on_list: consume_skb(skb); continue; } - __skb_queue_tail(&ctx->rx_list, skb); } if (partially_consumed) @@ -1943,23 +1943,24 @@ leave_on_list: err = skb_copy_datagram_msg(skb, rxm->offset, msg, chunk); - if (err < 0) + if (err < 0) { + __skb_queue_tail(&ctx->rx_list, skb); goto recv_end; + } if (is_peek) - goto leave_on_list; + goto put_on_rx_list; if (partially_consumed) { rxm->offset += chunk; rxm->full_len -= chunk; - goto leave_on_list; + goto put_on_rx_list; } } decrypted += chunk; len -= chunk; - __skb_unlink(skb, &ctx->rx_list); consume_skb(skb); /* Return full control message to userspace before trying |