Merge branch 'tls-introduce-and-use-rx-async-resync-request-cancel-function'

Tariq Toukan says:

====================
tls: Introduce and use RX async resync request cancel function

This series by Shahar introduces RX async resync request cancel function
in tls module, and uses it in mlx5e driver.

For a device-offloaded TLS RX connection, the TLS module increments
rcd_delta each time a new TLS record is received, tracking the distance
from the original resync request. In the meanwhile, the device is
queried and is expected to respond, asynchronously.

However, if the device response is delayed or fails (e.g due to unstable
connection and device getting out of tracking, hardware errors, resource
exhaustion etc.), the TLS module keeps logging and incrementing
rcd_delta, which can lead to a WARN() when rcd_delta exceeds the
threshold.

This series improves this code area by canceling the resync request when
spotting an issue with the device response.
====================

Link: https://patch.msgid.link/1761508983-937977-1-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 13 insertions, 12 deletions

diff --git a/include/net/tls.h b/include/net/tls.h
index 857340338b69..c7bcdb3afad7 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -451,25 +451,26 @@ static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
 
 /* Log all TLS record header TCP sequences in [seq, seq+len] */
 static inline void
-tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len)
+tls_offload_rx_resync_async_request_start(struct tls_offload_resync_async *resync_async,
+					  __be32 seq, u16 len)
 {
-	struct tls_context *tls_ctx = tls_get_ctx(sk);
-	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
-
-	atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) |
+	atomic64_set(&resync_async->req, ((u64)ntohl(seq) << 32) |
 		     ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC);
-	rx_ctx->resync_async->loglen = 0;
-	rx_ctx->resync_async->rcd_delta = 0;
+	resync_async->loglen = 0;
+	resync_async->rcd_delta = 0;
 }
 
 static inline void
-tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq)
+tls_offload_rx_resync_async_request_end(struct tls_offload_resync_async *resync_async,
+					__be32 seq)
 {
-	struct tls_context *tls_ctx = tls_get_ctx(sk);
-	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
+	atomic64_set(&resync_async->req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
+}
 
-	atomic64_set(&rx_ctx->resync_async->req,
-		     ((u64)ntohl(seq) << 32) | RESYNC_REQ);
+static inline void
+tls_offload_rx_resync_async_request_cancel(struct tls_offload_resync_async *resync_async)
+{
+	atomic64_set(&resync_async->req, 0);
 }
 
 static inline void