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Kernel: Avoid allocating KBuffers for TCP packets

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This avoids allocating a KBuffer for each incoming TCP packet.
This commit is contained in:
Gunnar Beutner 2021-05-11 19:47:40 +02:00 • committed by Andreas Kling
parent c0800ab898
commit 5feeb62843
3 changed files with 7 additions and 7 deletions
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4
Kernel/Net/IPv4Socket.cpp
View file

@ -369,7 +369,7 @@ KResultOr<size_t> IPv4Socket::recvfrom(FileDescription& description, UserOrKerne
return nreceived;
}
bool IPv4Socket::did_receive(const IPv4Address& source_address, u16 source_port, KBuffer&& packet, const Time& packet_timestamp)
bool IPv4Socket::did_receive(const IPv4Address& source_address, u16 source_port, ReadonlyBytes packet, const Time& packet_timestamp)
{
Locker locker(lock());
@ -398,7 +398,7 @@ bool IPv4Socket::did_receive(const IPv4Address& source_address, u16 source_port,
dbgln("IPv4Socket({}): did_receive refusing packet since queue is full.", this);
return false;
}
m_receive_queue.append({ source_address, source_port, packet_timestamp, move(packet) });
m_receive_queue.append({ source_address, source_port, packet_timestamp, KBuffer::copy(packet.data(), packet.size()) });
set_can_read(true);
}
m_bytes_received += packet_size;

2
Kernel/Net/IPv4Socket.h
View file

@ -43,7 +43,7 @@ public:
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
bool did_receive(const IPv4Address& peer_address, u16 peer_port, KBuffer&&, const Time&);
bool did_receive(const IPv4Address& peer_address, u16 peer_port, ReadonlyBytes, const Time&);
const IPv4Address& local_address() const { return m_local_address; }
u16 local_port() const { return m_local_port; }

8
Kernel/Net/NetworkTask.cpp
View file

@ -221,7 +221,7 @@ void handle_icmp(const EthernetFrameHeader& eth, const IPv4Packet& ipv4_packet,
}
}
for (auto& socket : icmp_sockets)
socket.did_receive(ipv4_packet.source(), 0, KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp);
socket.did_receive(ipv4_packet.source(), 0, { &ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size() }, packet_timestamp);
}
auto adapter = NetworkAdapter::from_ipv4_address(ipv4_packet.destination());
@ -276,7 +276,7 @@ void handle_udp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp)
auto& destination = ipv4_packet.destination();
if (destination == IPv4Address(255, 255, 255, 255) || NetworkAdapter::from_ipv4_address(destination) || socket->multicast_memberships().contains_slow(destination))
socket->did_receive(ipv4_packet.source(), udp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp);
socket->did_receive(ipv4_packet.source(), udp_packet.source_port(), { &ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size() }, packet_timestamp);
}
void handle_tcp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp)
@ -533,7 +533,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp)
if (tcp_packet.has_fin()) {
if (payload_size != 0)
socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp);
socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), { &ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size() }, packet_timestamp);
socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
@ -548,7 +548,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp)
tcp_packet.ack_number(), tcp_packet.sequence_number(), payload_size, socket->ack_number(), socket->sequence_number());
if (payload_size) {
if (socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp))
if (socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), { &ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size() }, packet_timestamp))
unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
}
}