[PATCH net-next 6/6] net/tls: add TlsDeviceRxResync statistic

[Jakub Kicinski]

Add a statistic for number of RX resyncs sent down to the NIC.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 Documentation/networking/tls.rst | 3 +++
 include/uapi/linux/snmp.h        | 1 +
 net/tls/tls_device.c             | 1 +
 net/tls/tls_proc.c               | 1 +
 4 files changed, 6 insertions(+)

diff --git a/Documentation/networking/tls.rst b/Documentation/networking/tls.rst
index ab82362dd819..8cb2cd4e2a80 100644
--- a/Documentation/networking/tls.rst
+++ b/Documentation/networking/tls.rst
@@ -236,3 +236,6 @@ TLS implementation exposes the following per-namespace 
statistics
 
 - ``TlsDecryptError`` -
   record decryption failed (e.g. due to incorrect authentication tag)
+
+- ``TlsDeviceRxResync`` -
+  number of RX resyncs sent to NICs handling cryptography
diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index c9e4963e26f0..7eee233e78d2 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -336,6 +336,7 @@ enum
        LINUX_MIB_TLSTXDEVICE,                  /* TlsTxDevice */
        LINUX_MIB_TLSRXDEVICE,                  /* TlsRxDevice */
        LINUX_MIB_TLSDECRYPTERROR,              /* TlsDecryptError */
+       LINUX_MIB_TLSRXDEVICERESYNC,            /* TlsRxDeviceResync */
        __LINUX_MIB_TLSMAX
 };
 
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 5a9a86bf0ee1..f306e4c7bf15 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -661,6 +661,7 @@ static void tls_device_resync_rx(struct tls_context 
*tls_ctx,
                netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn,
                                                   TLS_OFFLOAD_CTX_DIR_RX);
        clear_bit_unlock(TLS_RX_SYNC_RUNNING, &tls_ctx->flags);
+       TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICERESYNC);
 }
 
 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq)
diff --git a/net/tls/tls_proc.c b/net/tls/tls_proc.c
index 2bea7ef4823c..83d9c80a684e 100644
--- a/net/tls/tls_proc.c
+++ b/net/tls/tls_proc.c
@@ -16,6 +16,7 @@ static const struct snmp_mib tls_mib_list[] = {
        SNMP_MIB_ITEM("TlsTxDevice", LINUX_MIB_TLSTXDEVICE),
        SNMP_MIB_ITEM("TlsRxDevice", LINUX_MIB_TLSRXDEVICE),
        SNMP_MIB_ITEM("TlsDecryptError", LINUX_MIB_TLSDECRYPTERROR),
+       SNMP_MIB_ITEM("TlsRxDeviceResync", LINUX_MIB_TLSRXDEVICERESYNC),
        SNMP_MIB_SENTINEL
 };
 
-- 
2.21.0