diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/tls/tls_device.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index a562ebaaa33c..18fa6067bb7f 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -690,6 +690,47 @@ static void tls_device_resync_rx(struct tls_context *tls_ctx, TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICERESYNC); } +static bool +tls_device_rx_resync_async(struct tls_offload_resync_async *resync_async, + s64 resync_req, u32 *seq) +{ + u32 is_async = resync_req & RESYNC_REQ_ASYNC; + u32 req_seq = resync_req >> 32; + u32 req_end = req_seq + ((resync_req >> 16) & 0xffff); + + if (is_async) { + /* asynchronous stage: log all headers seq such that + * req_seq <= seq <= end_seq, and wait for real resync request + */ + if (between(*seq, req_seq, req_end) && + resync_async->loglen < TLS_DEVICE_RESYNC_ASYNC_LOGMAX) + resync_async->log[resync_async->loglen++] = *seq; + + return false; + } + + /* synchronous stage: check against the logged entries and + * proceed to check the next entries if no match was found + */ + while (resync_async->loglen) { + if (req_seq == resync_async->log[resync_async->loglen - 1] && + atomic64_try_cmpxchg(&resync_async->req, + &resync_req, 0)) { + resync_async->loglen = 0; + *seq = req_seq; + return true; + } + resync_async->loglen--; + } + + if (req_seq == *seq && + atomic64_try_cmpxchg(&resync_async->req, + &resync_req, 0)) + return true; + + return false; +} + void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) { struct tls_context *tls_ctx = tls_get_ctx(sk); @@ -736,6 +777,16 @@ void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) seq += rcd_len; tls_bigint_increment(rcd_sn, prot->rec_seq_size); break; + case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC: + resync_req = atomic64_read(&rx_ctx->resync_async->req); + is_req_pending = resync_req; + if (likely(!is_req_pending)) + return; + + if (!tls_device_rx_resync_async(rx_ctx->resync_async, + resync_req, &seq)) + return; + break; } tls_device_resync_rx(tls_ctx, sk, seq, rcd_sn); |