riscv/qemu - qemu - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
Peter Maydell	f8b94b4c52	net: mark struct ip_header as QEMU_PACKED The ip_header is not actually guaranteed to be aligned. We attempt to deal with this in some places such as net_checksum_calculate() by using stw_be_p and so on to access the fields, but this is not sufficient to be correct, because even accessing a byte member within an unaligned struct is undefined behaviour. The clang sanitizer will emit warnings like these if net_checksum_calculate() is called: Stopping network: ../../net/checksum.c:106:9: runtime error: member access within misaligned address 0x556aad9b502e for type 'struct ip_header', which requires 4 byte alignment 0x556aad9b502e: note: pointer points here 34 56 08 00 45 00 01 48 a5 09 40 00 40 11 7c 8b 0a 00 02 0f 0a 00 02 02 00 44 00 43 01 34 19 56 ^ SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../net/checksum.c:106:9 in ../../net/checksum.c:106:9: runtime error: load of misaligned address 0x556aad9b502e for type 'uint8_t' (aka 'unsigned char'), which requires 4 byte alignment 0x556aad9b502e: note: pointer points here 34 56 08 00 45 00 01 48 a5 09 40 00 40 11 7c 8b 0a 00 02 0f 0a 00 02 02 00 44 00 43 01 34 19 56 ^ Fix this by marking the ip_header struct as QEMU_PACKED, so that the compiler knows that it might be unaligned and will generate the right code for accessing fields. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20241114141619.806652-3-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>	1 year ago
Akihiko Odaki	7e64a9cabb	igb: Strip the second VLAN tag for extended VLAN Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	907209e311	igb: Implement Rx SCTP CSO Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	aaa8a15c96	net/eth: Always add VLAN tag It is possible to have another VLAN tag even if the packet is already tagged. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	85427bf388	net/eth: Use void pointers The uses of uint8_t pointers were misleading as they are never accessed as an array of octets and it even require more strict alignment to access as struct eth_header. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	7434951442	e1000x: Take CRC into consideration for size check Section 13.7.15 Receive Length Error Count says: > Packets over 1522 bytes are oversized if LongPacketEnable is 0b > (RCTL.LPE). If LongPacketEnable (LPE) is 1b, then an incoming packet > is considered oversized if it exceeds 16384 bytes. > These lengths are based on bytes in the received packet from > <Destination Address> through <CRC>, inclusively. As QEMU processes packets without CRC, the number of bytes for CRC need to be subtracted. This change adds some size definitions to be used to derive the new size thresholds to eth.h. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	0b11783014	net/eth: Rename eth_setup_vlan_headers_ex The old eth_setup_vlan_headers has no user so remove it and rename eth_setup_vlan_headers_ex. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	2f0fa232b8	net/net_rx_pkt: Use iovec for net_rx_pkt_set_protocols() igb does not properly ensure the buffer passed to net_rx_pkt_set_protocols() is contiguous for the entire L2/L3/L4 header. Allow it to pass scattered data to net_rx_pkt_set_protocols(). Fixes: `3a977deebe` ("Intrdocue igb device emulation") Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	65f474bbae	net/eth: Introduce EthL4HdrProto igb, a new network device emulation, will need SCTP checksum offloading. Currently eth_get_protocols() has a bool parameter for each protocol currently it supports, but there will be a bit too many parameters if we add yet another protocol. Introduce an enum type, EthL4HdrProto to represent all L4 protocols eth_get_protocols() support with one parameter. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	69ff5ef847	net/eth: Report if headers are actually present The values returned by eth_get_protocols() are used to perform RSS, checksumming and segmentation. Even when a packet signals the use of the protocols which these operations can be applied to, the headers for them may not be present because of too short packet or fragmentation, for example. In such a case, the operations cannot be applied safely. Report the presence of headers instead of whether the use of the protocols are indicated with eth_get_protocols(). This also makes corresponding changes to the callers of eth_get_protocols() to match with its new signature and to remove redundant checks for fragmentation. Fixes: `75020a7021` ("Common definitions for VMWARE devices") Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Akihiko Odaki	02ef5fdc09	hw/net/net_tx_pkt: Implement TCP segmentation There was no proper implementation of TCP segmentation before this change, and net_tx_pkt relied solely on IPv4 fragmentation. Not only this is not aligned with the specification, but it also resulted in corrupted IPv6 packets. This is particularly problematic for the igb, a new proposed device implementation; igb provides loopback feature for VMDq and the feature relies on software segmentation. Implement proper TCP segmentation in net_tx_pkt to fix such a scenario. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	3 years ago
Marc-André Lureau	e03b56863d	Replace config-time define HOST_WORDS_BIGENDIAN Replace a config-time define with a compile time condition define (compatible with clang and gcc) that must be declared prior to its usage. This avoids having a global configure time define, but also prevents from bad usage, if the config header wasn't included before. This can help to make some code independent from qemu too. gcc supports __BYTE_ORDER__ from about 4.6 and clang from 3.2. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> [ For the s390x parts I'm involved in ] Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323155743.1585078-7-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	4 years ago
Bin Meng	af774513f7	net: eth: Add a helper to pad a short Ethernet frame Add a helper to pad a short Ethernet frame to the minimum required length, which can be used by backends' code. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	5 years ago
Andrew	e219d30910	hw/net: Added plen fix for IPv6 Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1708065 With network backend with 'virtual header' - there was an issue in 'plen' field. Overall, during TSO, 'plen' would be changed, but with 'vheader' this field should be set to the size of the payload itself instead of '0'. Signed-off-by: Andrew Melnychenko <andrew@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	6 years ago
Yuri Benditovich	2974e916df	virtio-net: support RSC v4/v6 tcp traffic for Windows HCK This commit adds implementation of RX packets coalescing, compatible with requirements of Windows Hardware compatibility kit. The device enables feature VIRTIO_NET_F_RSC_EXT in host features if it supports extended RSC functionality as defined in the specification. This feature requires at least one of VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6. Windows guest driver acks this feature only if VIRTIO_NET_F_CTRL_GUEST_OFFLOADS is also present. If the guest driver acks VIRTIO_NET_F_RSC_EXT feature, the device coalesces TCPv4 and TCPv6 packets (if respective VIRTIO_NET_F_GUEST_TSO feature is on, populates extended RSC information in virtio header and sets VIRTIO_NET_HDR_F_RSC_INFO bit in header flags. The device does not recalculate checksums in the coalesced packet, so they are not valid. In this case: All the data packets in a tcp connection are cached to a single buffer in every receive interval, and will be sent out via a timer, the 'virtio_net_rsc_timeout' controls the interval, this value may impact the performance and response time of tcp connection, 50000(50us) is an experience value to gain a performance improvement, since the whql test sends packets every 100us, so '300000(300us)' passes the test case, it is the default value as well, tune it via the command line parameter 'rsc_interval' within 'virtio-net-pci' device, for example, to launch a guest with interval set as '500000': 'virtio-net-pci,netdev=hostnet1,bus=pci.0,id=net1,mac=00, guest_rsc_ext=on,rsc_interval=500000' The timer will only be triggered if the packets pool is not empty, and it'll drain off all the cached packets. 'NetRscChain' is used to save the segments of IPv4/6 in a VirtIONet device. A new segment becomes a 'Candidate' as well as it passed sanity check, the main handler of TCP includes TCP window update, duplicated ACK check and the real data coalescing. An 'Candidate' segment means: 1. Segment is within current window and the sequence is the expected one. 2. 'ACK' of the segment is in the valid window. Sanity check includes: 1. Incorrect version in IP header 2. An IP options or IP fragment 3. Not a TCP packet 4. Sanity size check to prevent buffer overflow attack. 5. An ECN packet Even though, there might more cases should be considered such as ip identification other flags, while it breaks the test because windows set it to the same even it's not a fragment. Normally it includes 2 typical ways to handle a TCP control flag, 'bypass' and 'finalize', 'bypass' means should be sent out directly, while 'finalize' means the packets should also be bypassed, but this should be done after search for the same connection packets in the pool and drain all of them out, this is to avoid out of order fragment. All the 'SYN' packets will be bypassed since this always begin a new' connection, other flags such 'URG/FIN/RST/CWR/ECE' will trigger a finalization, because this normally happens upon a connection is going to be closed, an 'URG' packet also finalize current coalescing unit. Statistics can be used to monitor the basic coalescing status, the 'out of order' and 'out of window' means how many retransmitting packets, thus describe the performance intuitively. Difference between ip v4 and v6 processing: Fragment length in ipv4 header includes itself, while it's not included for ipv6, thus means ipv6 can carry a real 65535 payload. Note that main goal of implementing this feature in software is to create reference setup for certification tests. In such setups guest migration is not required, so the coalesced packets not yet delivered to the guest will be lost in case of migration. Signed-off-by: Wei Xu <wexu@redhat.com> Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	7 years ago
Marc-André Lureau	4f51e1d386	net: fix misaligned member access Fixes the following ASAN warnings: /home/elmarco/src/qemu/hw/net/net_tx_pkt.c:201:27: runtime error: member access within misaligned address 0x631000028846 for type 'struct ip_header', which requires 4 byte alignment 0x631000028846: note: pointer points here 01 00 00 00 45 00 01 a9 01 00 00 00 40 11 78 45 00 00 00 00 ff ff ff ff 00 00 00 00 00 00 00 00 ^ /home/elmarco/src/qemu/hw/net/net_tx_pkt.c:208:63: runtime error: member access within misaligned address 0x631000028846 for type 'struct ip_header', which requires 4 byte alignment 0x631000028846: note: pointer points here 01 00 00 00 45 00 01 a9 01 00 00 00 40 11 78 45 00 00 00 00 ff ff ff ff 00 00 00 00 00 00 00 00 ^ /home/elmarco/src/qemu/hw/net/net_tx_pkt.c:210:13: runtime error: member access within misaligned address 0x631000028846 for type 'struct ip_header', which requires 4 byte alignment 0x631000028846: note: pointer points here 01 00 00 00 45 00 01 a9 01 00 00 00 40 11 78 45 00 00 00 00 ff ff ff ff 00 00 00 00 00 00 00 00 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20180209190340.19516-1-marcandre.lureau@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>	8 years ago
Cédric Le Goater	47bb83cad4	slirp: add a fake NC-SI backend NC-SI (Network Controller Sideband Interface) enables a BMC to manage a set of NICs on a system. This model takes the simplest approach and reverses the NC-SI packets to pretend a NIC is present and exercise the Linux driver. The NCSI header file <ncsi-pkt.h> comes from mainline Linux and was untabified. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Jason Wang <jasowang@redhat.com>	9 years ago
Dmitry Fleytman	566342c312	eth: Extend vlan stripping functions Make VLAN stripping functions return number of bytes copied to given Ethernet header buffer. This information should be used to re-compose packet IOV after VLAN stripping. Cc: qemu-stable@nongnu.org Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	9 years ago
Dmitry Fleytman	eb700029c7	net_pkt: Extend packet abstraction as required by e1000e functionality This patch extends the TX/RX packet abstractions with features that will be used by the e1000e device implementation. Changes are: 1. Support iovec lists for RX buffers 2. Deeper RX packets parsing 3. Loopback option for TX packets 4. Extended VLAN headers handling 5. RSS processing for RX packets Signed-off-by: Dmitry Fleytman <dmitry.fleytman@ravellosystems.com> Signed-off-by: Leonid Bloch <leonid.bloch@ravellosystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Dmitry Fleytman	66409b7c8b	rtl8139: Move more TCP definitions to common header Signed-off-by: Dmitry Fleytman <dmitry.fleytman@ravellosystems.com> Signed-off-by: Leonid Bloch <leonid.bloch@ravellosystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Peter Maydell	90ce6e2644	include: Clean up includes Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. NB: If this commit breaks compilation for your out-of-tree patchseries or fork, then you need to make sure you add #include "qemu/osdep.h" to any new .c files that you have. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>	10 years ago
Dr. David Alan Gilbert	9c7ffe2664	ether/slirp: Avoid redefinition of the same constants eth.h and slirp.h both define ETH_ALEN and ETH_P_IP rtl8139.c and eth.h both define ETH_HLEN Move the related constant (ETH_P_ARP) from slirp.h to eth.h, and remove the duplicates; make slirp.h include eth.h Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Jason Wang <jasowang@redhat.com>	10 years ago
Dmitry Krivenok	d60b20cf2a	net: disallow to specify multicast MAC address [Assigning a multicast MAC address to a NIC leads to confusing behavior. Reject multicast MAC addresses so users are alerted to their error straight away. The "net/eth.h" in6_addr rename prevents a name collision with <netinet/in.h> on Linux. -- Stefan] Signed-off-by: Dmitry V. Krivenok <krivenok.dmitry@gmail.com> Reviewed-by: Amos Kong <kongjianjun@gmail.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>	13 years ago
Dmitry Fleytman	75020a7021	Common definitions for VMWARE devices Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Yan Vugenfirer <yan@daynix.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>	13 years ago

24 Commits (a261d3e331ca06f4d92e689f2bee40d0a0cdee08)