Commit 9ec1c6ac authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

net/tls: add device decrypted trace point 



Add a tracepoint to the TLS offload's fast path. This tracepoint
can be used to track the decrypted and encrypted status of received
records. Records decrypted by the device should have decrypted set
to 1, records which have neither decrypted nor decrypted set are
partially decrypted, require re-encryption and therefore are most
expensive to deal with.

Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8538d29c

net/tls/tls_device.c

+5 −0
Original line number Diff line number Diff line
@@ -850,6 +850,7 @@ int tls_device_decrypted(struct sock *sk, struct sk_buff *skb) 
{

	struct tls_context *tls_ctx = tls_get_ctx(sk);

	struct tls_offload_context_rx *ctx = tls_offload_ctx_rx(tls_ctx);

	struct strp_msg *rxm = strp_msg(skb);

	int is_decrypted = skb->decrypted;

	int is_encrypted = !is_decrypted;

	struct sk_buff *skb_iter;
@@ -860,6 +861,10 @@ int tls_device_decrypted(struct sock *sk, struct sk_buff *skb) 
		is_encrypted &= !skb_iter->decrypted;

	}



	trace_tls_device_decrypted(sk, tcp_sk(sk)->copied_seq - rxm->full_len,

				   tls_ctx->rx.rec_seq, rxm->full_len,

				   is_encrypted, is_decrypted);



	ctx->sw.decrypted |= is_decrypted;



	/* Return immediately if the record is either entirely plaintext or

net/tls/trace.h

+33 −0
Original line number Diff line number Diff line
@@ -41,6 +41,39 @@ TRACE_EVENT(tls_device_offload_set, 
	)

);



TRACE_EVENT(tls_device_decrypted,



	TP_PROTO(struct sock *sk, u32 tcp_seq, u8 *rec_no, u32 rec_len,

		 bool encrypted, bool decrypted),



	TP_ARGS(sk, tcp_seq, rec_no, rec_len, encrypted, decrypted),



	TP_STRUCT__entry(

		__field(	struct sock *,	sk		)

		__field(	u64,		rec_no		)

		__field(	u32,		tcp_seq		)

		__field(	u32,		rec_len		)

		__field(	bool,		encrypted	)

		__field(	bool,		decrypted	)

	),



	TP_fast_assign(

		__entry->sk = sk;

		__entry->rec_no = get_unaligned_be64(rec_no);

		__entry->tcp_seq = tcp_seq;

		__entry->rec_len = rec_len;

		__entry->encrypted = encrypted;

		__entry->decrypted = decrypted;

	),



	TP_printk(

		"sk=%p tcp_seq=%u rec_no=%llu len=%u encrypted=%d decrypted=%d",

		__entry->sk, __entry->tcp_seq,

		__entry->rec_no, __entry->rec_len,

		__entry->encrypted, __entry->decrypted

	)

);



TRACE_EVENT(tls_device_rx_resync_send,



	TP_PROTO(struct sock *sk, u32 tcp_seq, u8 *rec_no, int sync_type),

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