[PATCH v5 net-next 04/36] net/tls: expose get_netdev_for_sock
From: Boris Pismenny <borisp@nvidia.com>
Date: 2021-07-22 11:05:47
Also in:
netdev
Subsystem:
networking [general], networking [sockets], networking [tls], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, John Fastabend, Sabrina Dubroca, Linus Torvalds
From: Boris Pismenny <redacted> get_netdev_for_sock is a utility that is used to obtain the net_device structure from a connected socket. Later patches will use this for nvme-tcp DDP and DDP DDGST offloads. Signed-off-by: Boris Pismenny <redacted> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> --- include/net/sock.h | 17 +++++++++++++++++ net/tls/tls_device.c | 20 ++------------------ 2 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h
index 8bdd80027ffb..5fa2fd192d18 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h@@ -2769,4 +2769,21 @@ void sock_set_sndtimeo(struct sock *sk, s64 secs); int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len); +/* Assume that the socket is already connected */ +static inline struct net_device *get_netdev_for_sock(struct sock *sk, bool hold) +{ + struct dst_entry *dst = sk_dst_get(sk); + struct net_device *netdev = NULL; + + if (likely(dst)) { + netdev = dst->dev; + if (hold) + dev_hold(netdev); + } + + dst_release(dst); + + return netdev; +} + #endif /* _SOCK_H */
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index b932469ee69c..06aa5f1e73d1 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c@@ -107,22 +107,6 @@ static void tls_device_queue_ctx_destruction(struct tls_context *ctx) spin_unlock_irqrestore(&tls_device_lock, flags); } -/* We assume that the socket is already connected */ -static struct net_device *get_netdev_for_sock(struct sock *sk) -{ - struct dst_entry *dst = sk_dst_get(sk); - struct net_device *netdev = NULL; - - if (likely(dst)) { - netdev = netdev_sk_get_lowest_dev(dst->dev, sk); - dev_hold(netdev); - } - - dst_release(dst); - - return netdev; -} - static void destroy_record(struct tls_record_info *record) { int i;
@@ -1118,7 +1102,7 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx) if (skb) TCP_SKB_CB(skb)->eor = 1; - netdev = get_netdev_for_sock(sk); + netdev = get_netdev_for_sock(sk, true); if (!netdev) { pr_err_ratelimited("%s: netdev not found\n", __func__); rc = -EINVAL;
@@ -1194,7 +1178,7 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) if (ctx->crypto_recv.info.version != TLS_1_2_VERSION) return -EOPNOTSUPP; - netdev = get_netdev_for_sock(sk); + netdev = get_netdev_for_sock(sk, true); if (!netdev) { pr_err_ratelimited("%s: netdev not found\n", __func__); return -EINVAL;
--
2.24.1
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