From 12bdff73a147aebcea8efae2b395ef0c27448909 Mon Sep 17 00:00:00 2001 From: David Howells Date: Mon, 29 Jan 2024 15:01:10 +0000 Subject: rxrpc: Convert rxrpc_txbuf::flags into a mask and don't use atomics Convert the transmission buffer flags into a mask and use | and & rather than bitops functions (atomic ops are not required as only the I/O thread can manipulate them once submitted for transmission). The bottom byte can then correspond directly to the Rx protocol header flags. Signed-off-by: David Howells cc: Marc Dionne cc: "David S. Miller" cc: Eric Dumazet cc: Jakub Kicinski cc: Paolo Abeni cc: linux-afs@lists.infradead.org cc: netdev@vger.kernel.org --- net/rxrpc/ar-internal.h | 8 ++++---- net/rxrpc/call_event.c | 8 ++++---- net/rxrpc/input.c | 2 +- net/rxrpc/output.c | 27 +++++++++++++-------------- net/rxrpc/sendmsg.c | 10 ++++------ net/rxrpc/txbuf.c | 4 ++-- 6 files changed, 28 insertions(+), 31 deletions(-) (limited to 'net/rxrpc') diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index f76125755810..54d1dc97cb0f 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -800,9 +800,9 @@ struct rxrpc_txbuf { unsigned int len; /* Amount of data in buffer */ unsigned int space; /* Remaining data space */ unsigned int offset; /* Offset of fill point */ - unsigned long flags; -#define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ -#define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ + unsigned int flags; +#define RXRPC_TXBUF_WIRE_FLAGS 0xff /* The wire protocol flags */ +#define RXRPC_TXBUF_RESENT 0x100 /* Set if has been resent */ u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ struct { /* The packet for encrypting and DMA'ing. We align it such @@ -822,7 +822,7 @@ struct rxrpc_txbuf { static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) { - return txb->wire.flags & RXRPC_CLIENT_INITIATED; + return txb->flags & RXRPC_CLIENT_INITIATED; } static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index a4c309976719..77eacbfc5d45 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -84,7 +84,7 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason, txb->ack_why = why; txb->wire.seq = 0; txb->wire.type = RXRPC_PACKET_TYPE_ACK; - txb->wire.flags |= RXRPC_SLOW_START_OK; + txb->flags |= RXRPC_SLOW_START_OK; txb->ack.bufferSpace = 0; txb->ack.maxSkew = 0; txb->ack.firstPacket = 0; @@ -167,7 +167,7 @@ void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb) if (list_empty(&txb->tx_link)) { list_add_tail(&txb->tx_link, &retrans_queue); - set_bit(RXRPC_TXBUF_RESENT, &txb->flags); + txb->flags |= RXRPC_TXBUF_RESENT; } trace_rxrpc_retransmit(call, txb->seq, txb->serial, @@ -210,7 +210,7 @@ void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb) unacked = true; if (list_empty(&txb->tx_link)) { list_add_tail(&txb->tx_link, &retrans_queue); - set_bit(RXRPC_TXBUF_RESENT, &txb->flags); + txb->flags |= RXRPC_TXBUF_RESENT; rxrpc_inc_stat(call->rxnet, stat_tx_data_retrans); } } @@ -320,7 +320,7 @@ static void rxrpc_decant_prepared_tx(struct rxrpc_call *call) call->tx_top = txb->seq; list_add_tail(&txb->call_link, &call->tx_buffer); - if (txb->wire.flags & RXRPC_LAST_PACKET) + if (txb->flags & RXRPC_LAST_PACKET) rxrpc_close_tx_phase(call); rxrpc_transmit_one(call, txb); diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index 9691de00ade7..c435b50c33f4 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -212,7 +212,7 @@ static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, list_for_each_entry_rcu(txb, &call->tx_buffer, call_link, false) { if (before_eq(txb->seq, call->acks_hard_ack)) continue; - if (test_bit(RXRPC_TXBUF_LAST, &txb->flags)) { + if (txb->flags & RXRPC_LAST_PACKET) { set_bit(RXRPC_CALL_TX_LAST, &call->flags); rot_last = true; } diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index bad96a983e12..8344ece5358a 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -205,7 +205,8 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) msg.msg_flags = 0; if (txb->ack.reason == RXRPC_ACK_PING) - txb->wire.flags |= RXRPC_REQUEST_ACK; + txb->flags |= RXRPC_REQUEST_ACK; + txb->wire.flags = txb->flags & RXRPC_TXBUF_WIRE_FLAGS; n = rxrpc_fill_out_ack(conn, call, txb, &rwind); if (n == 0) @@ -239,7 +240,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) } else { trace_rxrpc_tx_packet(call->debug_id, &txb->wire, rxrpc_tx_point_call_ack); - if (txb->wire.flags & RXRPC_REQUEST_ACK) + if (txb->flags & RXRPC_REQUEST_ACK) call->peer->rtt_last_req = ktime_get_real(); } rxrpc_tx_backoff(call, ret); @@ -357,13 +358,13 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) * service call, lest OpenAFS incorrectly send us an ACK with some * soft-ACKs in it and then never follow up with a proper hard ACK. */ - if (txb->wire.flags & RXRPC_REQUEST_ACK) + if (txb->flags & RXRPC_REQUEST_ACK) why = rxrpc_reqack_already_on; - else if (test_bit(RXRPC_TXBUF_LAST, &txb->flags) && rxrpc_sending_to_client(txb)) + else if ((txb->flags & RXRPC_LAST_PACKET) && rxrpc_sending_to_client(txb)) why = rxrpc_reqack_no_srv_last; else if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events)) why = rxrpc_reqack_ack_lost; - else if (test_bit(RXRPC_TXBUF_RESENT, &txb->flags)) + else if (txb->flags & RXRPC_TXBUF_RESENT) why = rxrpc_reqack_retrans; else if (call->cong_mode == RXRPC_CALL_SLOW_START && call->cong_cwnd <= 2) why = rxrpc_reqack_slow_start; @@ -379,7 +380,7 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) rxrpc_inc_stat(call->rxnet, stat_why_req_ack[why]); trace_rxrpc_req_ack(call->debug_id, txb->seq, why); if (why != rxrpc_reqack_no_srv_last) - txb->wire.flags |= RXRPC_REQUEST_ACK; + txb->flags |= RXRPC_REQUEST_ACK; dont_set_request_ack: if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) { @@ -387,15 +388,12 @@ dont_set_request_ack: if ((lose++ & 7) == 7) { ret = 0; trace_rxrpc_tx_data(call, txb->seq, txb->serial, - txb->wire.flags, - test_bit(RXRPC_TXBUF_RESENT, &txb->flags), - true); + txb->flags, true); goto done; } } - trace_rxrpc_tx_data(call, txb->seq, txb->serial, txb->wire.flags, - test_bit(RXRPC_TXBUF_RESENT, &txb->flags), false); + trace_rxrpc_tx_data(call, txb->seq, txb->serial, txb->flags, false); /* Track what we've attempted to transmit at least once so that the * retransmission algorithm doesn't try to resend what we haven't sent @@ -411,8 +409,9 @@ dont_set_request_ack: if (txb->len >= call->peer->maxdata) goto send_fragmentable; + txb->wire.flags = txb->flags & RXRPC_TXBUF_WIRE_FLAGS; txb->last_sent = ktime_get_real(); - if (txb->wire.flags & RXRPC_REQUEST_ACK) + if (txb->flags & RXRPC_REQUEST_ACK) rtt_slot = rxrpc_begin_rtt_probe(call, txb->serial, rxrpc_rtt_tx_data); /* send the packet by UDP @@ -442,7 +441,7 @@ dont_set_request_ack: done: if (ret >= 0) { call->tx_last_sent = txb->last_sent; - if (txb->wire.flags & RXRPC_REQUEST_ACK) { + if (txb->flags & RXRPC_REQUEST_ACK) { call->peer->rtt_last_req = txb->last_sent; if (call->peer->rtt_count > 1) { unsigned long nowj = jiffies, ack_lost_at; @@ -486,7 +485,7 @@ send_fragmentable: _debug("send fragment"); txb->last_sent = ktime_get_real(); - if (txb->wire.flags & RXRPC_REQUEST_ACK) + if (txb->flags & RXRPC_REQUEST_ACK) rtt_slot = rxrpc_begin_rtt_probe(call, txb->serial, rxrpc_rtt_tx_data); switch (conn->local->srx.transport.family) { diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index 5677d5690a02..25c7c1d4f4c6 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -240,7 +240,7 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, rxrpc_notify_end_tx_t notify_end_tx) { rxrpc_seq_t seq = txb->seq; - bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags), poke; + bool poke, last = txb->flags & RXRPC_LAST_PACKET; rxrpc_inc_stat(call->rxnet, stat_tx_data); @@ -394,13 +394,11 @@ reload: /* add the packet to the send queue if it's now full */ if (!txb->space || (msg_data_left(msg) == 0 && !more)) { - if (msg_data_left(msg) == 0 && !more) { - txb->wire.flags |= RXRPC_LAST_PACKET; - __set_bit(RXRPC_TXBUF_LAST, &txb->flags); - } + if (msg_data_left(msg) == 0 && !more) + txb->flags |= RXRPC_LAST_PACKET; else if (call->tx_top - call->acks_hard_ack < call->tx_winsize) - txb->wire.flags |= RXRPC_MORE_PACKETS; + txb->flags |= RXRPC_MORE_PACKETS; ret = call->security->secure_packet(call, txb); if (ret < 0) diff --git a/net/rxrpc/txbuf.c b/net/rxrpc/txbuf.c index f2903c81cf5b..48d5a8f644e5 100644 --- a/net/rxrpc/txbuf.c +++ b/net/rxrpc/txbuf.c @@ -31,7 +31,7 @@ struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, txb->space = sizeof(txb->data); txb->len = 0; txb->offset = 0; - txb->flags = 0; + txb->flags = call->conn->out_clientflag; txb->ack_why = 0; txb->seq = call->tx_prepared + 1; txb->serial = 0; @@ -40,7 +40,7 @@ struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, txb->wire.callNumber = htonl(call->call_id); txb->wire.seq = htonl(txb->seq); txb->wire.type = packet_type; - txb->wire.flags = call->conn->out_clientflag; + txb->wire.flags = 0; txb->wire.userStatus = 0; txb->wire.securityIndex = call->security_ix; txb->wire._rsvd = 0; -- cgit