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net/tls: add tracing for device/offload events
Add tracing of device-related interaction to aid performance analysis, especially around resync: tls:tls_device_offload_set tls:tls_device_rx_resync_send tls:tls_device_rx_resync_nh_schedule tls:tls_device_rx_resync_nh_delay tls:tls_device_tx_resync_req tls:tls_device_tx_resync_send Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
David S. Miller
parent
6f4c930e02
commit
8538d29cea
@ -872,7 +872,8 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
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/* jump forward, a TX may have gotten lost, need to sync TX */
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if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4)
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tls_offload_tx_resync_request(nskb->sk);
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tls_offload_tx_resync_request(nskb->sk, seq,
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ntls->next_seq);
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*nr_frags = 0;
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return nskb;
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@ -594,13 +594,6 @@ tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
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tls_offload_ctx_rx(tls_ctx)->resync_type = type;
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}
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static inline void tls_offload_tx_resync_request(struct sock *sk)
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{
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags));
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}
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/* Driver's seq tracking has to be disabled until resync succeeded */
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static inline bool tls_offload_tx_resync_pending(struct sock *sk)
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{
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@ -634,6 +627,7 @@ void tls_device_free_resources_tx(struct sock *sk);
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int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
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void tls_device_offload_cleanup_rx(struct sock *sk);
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void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
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void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
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int tls_device_decrypted(struct sock *sk, struct sk_buff *skb);
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#else
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static inline void tls_device_init(void) {}
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@ -3,9 +3,11 @@
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# Makefile for the TLS subsystem.
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#
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CFLAGS_trace.o := -I$(src)
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obj-$(CONFIG_TLS) += tls.o
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tls-y := tls_main.o tls_sw.o
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tls-y := tls_main.o tls_sw.o trace.o
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tls-$(CONFIG_TLS_TOE) += tls_toe.o
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tls-$(CONFIG_TLS_DEVICE) += tls_device.o tls_device_fallback.o
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@ -38,6 +38,8 @@
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#include <net/tcp.h>
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#include <net/tls.h>
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#include "trace.h"
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/* device_offload_lock is used to synchronize tls_dev_add
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* against NETDEV_DOWN notifications.
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*/
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@ -202,6 +204,15 @@ void tls_device_free_resources_tx(struct sock *sk)
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tls_free_partial_record(sk, tls_ctx);
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}
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void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq)
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{
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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trace_tls_device_tx_resync_req(sk, got_seq, exp_seq);
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WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags));
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}
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EXPORT_SYMBOL_GPL(tls_offload_tx_resync_request);
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static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx,
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u32 seq)
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{
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@ -216,6 +227,7 @@ static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx,
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rcd_sn = tls_ctx->tx.rec_seq;
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trace_tls_device_tx_resync_send(sk, seq, rcd_sn);
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down_read(&device_offload_lock);
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netdev = tls_ctx->netdev;
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if (netdev)
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@ -637,10 +649,13 @@ void tls_device_write_space(struct sock *sk, struct tls_context *ctx)
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static void tls_device_resync_rx(struct tls_context *tls_ctx,
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struct sock *sk, u32 seq, u8 *rcd_sn)
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{
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struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
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struct net_device *netdev;
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if (WARN_ON(test_and_set_bit(TLS_RX_SYNC_RUNNING, &tls_ctx->flags)))
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return;
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trace_tls_device_rx_resync_send(sk, seq, rcd_sn, rx_ctx->resync_type);
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netdev = READ_ONCE(tls_ctx->netdev);
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if (netdev)
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netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn,
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@ -653,8 +668,8 @@ void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq)
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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struct tls_offload_context_rx *rx_ctx;
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u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE];
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u32 sock_data, is_req_pending;
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struct tls_prot_info *prot;
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u32 is_req_pending;
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s64 resync_req;
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u32 req_seq;
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@ -683,8 +698,12 @@ void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq)
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/* head of next rec is already in, note that the sock_inq will
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* include the currently parsed message when called from parser
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*/
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if (tcp_inq(sk) > rcd_len)
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sock_data = tcp_inq(sk);
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if (sock_data > rcd_len) {
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trace_tls_device_rx_resync_nh_delay(sk, sock_data,
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rcd_len);
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return;
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}
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rx_ctx->resync_nh_do_now = 0;
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seq += rcd_len;
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@ -728,6 +747,7 @@ static void tls_device_core_ctrl_rx_resync(struct tls_context *tls_ctx,
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/* head of next rec is already in, parser will sync for us */
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if (tcp_inq(sk) > rxm->full_len) {
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trace_tls_device_rx_resync_nh_schedule(sk);
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ctx->resync_nh_do_now = 1;
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} else {
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struct tls_prot_info *prot = &tls_ctx->prot_info;
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@ -1013,6 +1033,8 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
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rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_TX,
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&ctx->crypto_send.info,
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tcp_sk(sk)->write_seq);
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trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_TX,
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tcp_sk(sk)->write_seq, rec_seq, rc);
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if (rc)
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goto release_lock;
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@ -1049,6 +1071,7 @@ free_marker_record:
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int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
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{
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struct tls12_crypto_info_aes_gcm_128 *info;
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struct tls_offload_context_rx *context;
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struct net_device *netdev;
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int rc = 0;
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@ -1096,6 +1119,9 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
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rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX,
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&ctx->crypto_recv.info,
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tcp_sk(sk)->copied_seq);
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info = (void *)&ctx->crypto_recv.info;
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trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_RX,
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tcp_sk(sk)->copied_seq, info->rec_seq, rc);
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if (rc)
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goto free_sw_resources;
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10
net/tls/trace.c
Normal file
10
net/tls/trace.c
Normal file
@ -0,0 +1,10 @@
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2019 Netronome Systems, Inc. */
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#include <linux/module.h>
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#ifndef __CHECKER__
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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#endif
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169
net/tls/trace.h
Normal file
169
net/tls/trace.h
Normal file
@ -0,0 +1,169 @@
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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (C) 2019 Netronome Systems, Inc. */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM tls
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#if !defined(_TLS_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
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#define _TLS_TRACE_H_
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#include <asm/unaligned.h>
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#include <linux/tracepoint.h>
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struct sock;
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TRACE_EVENT(tls_device_offload_set,
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TP_PROTO(struct sock *sk, int dir, u32 tcp_seq, u8 *rec_no, int ret),
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TP_ARGS(sk, dir, tcp_seq, rec_no, ret),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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__field( u64, rec_no )
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__field( int, dir )
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__field( u32, tcp_seq )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->sk = sk;
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__entry->rec_no = get_unaligned_be64(rec_no);
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__entry->dir = dir;
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__entry->tcp_seq = tcp_seq;
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__entry->ret = ret;
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),
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TP_printk(
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"sk=%p direction=%d tcp_seq=%u rec_no=%llu ret=%d",
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__entry->sk, __entry->dir, __entry->tcp_seq, __entry->rec_no,
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__entry->ret
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)
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);
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TRACE_EVENT(tls_device_rx_resync_send,
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TP_PROTO(struct sock *sk, u32 tcp_seq, u8 *rec_no, int sync_type),
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TP_ARGS(sk, tcp_seq, rec_no, sync_type),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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__field( u64, rec_no )
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__field( u32, tcp_seq )
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__field( int, sync_type )
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),
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TP_fast_assign(
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__entry->sk = sk;
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__entry->rec_no = get_unaligned_be64(rec_no);
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__entry->tcp_seq = tcp_seq;
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__entry->sync_type = sync_type;
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),
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TP_printk(
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"sk=%p tcp_seq=%u rec_no=%llu sync_type=%d",
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__entry->sk, __entry->tcp_seq, __entry->rec_no,
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__entry->sync_type
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)
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);
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TRACE_EVENT(tls_device_rx_resync_nh_schedule,
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TP_PROTO(struct sock *sk),
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TP_ARGS(sk),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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),
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TP_fast_assign(
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__entry->sk = sk;
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),
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TP_printk(
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"sk=%p", __entry->sk
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)
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);
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TRACE_EVENT(tls_device_rx_resync_nh_delay,
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TP_PROTO(struct sock *sk, u32 sock_data, u32 rec_len),
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TP_ARGS(sk, sock_data, rec_len),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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__field( u32, sock_data )
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__field( u32, rec_len )
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),
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TP_fast_assign(
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__entry->sk = sk;
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__entry->sock_data = sock_data;
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__entry->rec_len = rec_len;
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),
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TP_printk(
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"sk=%p sock_data=%u rec_len=%u",
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__entry->sk, __entry->sock_data, __entry->rec_len
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)
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);
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TRACE_EVENT(tls_device_tx_resync_req,
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TP_PROTO(struct sock *sk, u32 tcp_seq, u32 exp_tcp_seq),
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TP_ARGS(sk, tcp_seq, exp_tcp_seq),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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__field( u32, tcp_seq )
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__field( u32, exp_tcp_seq )
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),
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TP_fast_assign(
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__entry->sk = sk;
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__entry->tcp_seq = tcp_seq;
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__entry->exp_tcp_seq = exp_tcp_seq;
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),
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TP_printk(
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"sk=%p tcp_seq=%u exp_tcp_seq=%u",
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__entry->sk, __entry->tcp_seq, __entry->exp_tcp_seq
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)
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);
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TRACE_EVENT(tls_device_tx_resync_send,
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TP_PROTO(struct sock *sk, u32 tcp_seq, u8 *rec_no),
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TP_ARGS(sk, tcp_seq, rec_no),
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TP_STRUCT__entry(
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__field( struct sock *, sk )
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__field( u64, rec_no )
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__field( u32, tcp_seq )
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),
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TP_fast_assign(
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__entry->sk = sk;
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__entry->rec_no = get_unaligned_be64(rec_no);
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__entry->tcp_seq = tcp_seq;
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),
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TP_printk(
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"sk=%p tcp_seq=%u rec_no=%llu",
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__entry->sk, __entry->tcp_seq, __entry->rec_no
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)
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);
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#endif /* _TLS_TRACE_H_ */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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