kernel/linux.git/drivers/net/vxlan, branch linux-6.9.y

vxlan: Pull inner IP header in vxlan_xmit_one().

2024-07-05T07:37:53+00:00

[ Upstream commit 31392048f55f98cb01ca709d32d06d926ab9760a ] Ensure the inner IP header is part of the skb's linear data before setting old_iph. Otherwise, on a non-linear skb, old_iph could point outside of the packet data. Unlike classical VXLAN, which always encapsulates Ethernet packets, VXLAN-GPE can transport IP packets directly. In that case, we need to look at skb->protocol to figure out if an Ethernet header is present. Fixes: d342894c5d2f ("vxlan: virtual extensible lan") Signed-off-by: Guillaume Nault Link: https://patch.msgid.link/2aa75f6fa62ac9dbe4f16ad5ba75dd04a51d4b99.1718804000.git.gnault@redhat.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

vxlan: Fix regression when dropping packets due to invalid src addresses

2024-06-16T11:50:54+00:00

commit 1cd4bc987abb2823836cbb8f887026011ccddc8a upstream. Commit f58f45c1e5b9 ("vxlan: drop packets from invalid src-address") has recently been added to vxlan mainly in the context of source address snooping/learning so that when it is enabled, an entry in the FDB is not being created for an invalid address for the corresponding tunnel endpoint. Before commit f58f45c1e5b9 vxlan was similarly behaving as geneve in that it passed through whichever macs were set in the L2 header. It turns out that this change in behavior breaks setups, for example, Cilium with netkit in L3 mode for Pods as well as tunnel mode has been passing before the change in f58f45c1e5b9 for both vxlan and geneve. After mentioned change it is only passing for geneve as in case of vxlan packets are dropped due to vxlan_set_mac() returning false as source and destination macs are zero which for E/W traffic via tunnel is totally fine. Fix it by only opting into the is_valid_ether_addr() check in vxlan_set_mac() when in fact source address snooping/learning is actually enabled in vxlan. This is done by moving the check into vxlan_snoop(). With this change, the Cilium connectivity test suite passes again for both tunnel flavors. Fixes: f58f45c1e5b9 ("vxlan: drop packets from invalid src-address") Signed-off-by: Daniel Borkmann Cc: David Bauer Cc: Ido Schimmel Cc: Nikolay Aleksandrov Cc: Martin KaFai Lau Reviewed-by: Ido Schimmel Reviewed-by: Nikolay Aleksandrov Reviewed-by: David Bauer Signed-off-by: David S. Miller Signed-off-by: Daniel Borkmann Signed-off-by: Greg Kroah-Hartman

ipv6: introduce dst_rt6_info() helper

2024-06-12T09:39:54+00:00

[ Upstream commit e8dfd42c17faf183415323db1ef0c977be0d6489 ] Instead of (struct rt6_info *)dst casts, we can use : #define dst_rt6_info(_ptr) \ container_of_const(_ptr, struct rt6_info, dst) Some places needed missing const qualifiers : ip6_confirm_neigh(), ipv6_anycast_destination(), ipv6_unicast_destination(), has_gateway() v2: added missing parts (David Ahern) Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller Stable-dep-of: 92f1655aa2b2 ("net: fix __dst_negative_advice() race") Signed-off-by: Sasha Levin

vxlan: Pull inner IP header in vxlan_rcv().

2024-05-02T02:07:11+00:00

Ensure the inner IP header is part of skb's linear data before reading its ECN bits. Otherwise we might read garbage. One symptom is the system erroneously logging errors like "vxlan: non-ECT from xxx.xxx.xxx.xxx with TOS=xxxx". Similar bugs have been fixed in geneve, ip_tunnel and ip6_tunnel (see commit 1ca1ba465e55 ("geneve: make sure to pull inner header in geneve_rx()") for example). So let's reuse the same code structure for consistency. Maybe we'll can add a common helper in the future. Fixes: d342894c5d2f ("vxlan: virtual extensible lan") Signed-off-by: Guillaume Nault Reviewed-by: Ido Schimmel Reviewed-by: Eric Dumazet Reviewed-by: Nikolay Aleksandrov Reviewed-by: Sabrina Dubroca Link: https://lore.kernel.org/r/1239c8db54efec341dd6455c77e0380f58923a3c.1714495737.git.gnault@redhat.com Signed-off-by: Jakub Kicinski

vxlan: Add missing VNI filter counter update in arp_reduce().

2024-04-29T12:39:15+00:00

VXLAN stores per-VNI statistics using vxlan_vnifilter_count(). These statistics were not updated when arp_reduce() failed its pskb_may_pull() call. Use vxlan_vnifilter_count() to update the VNI counter when that happens. Fixes: 4095e0e1328a ("drivers: vxlan: vnifilter: per vni stats") Signed-off-by: Guillaume Nault Signed-off-by: David S. Miller

vxlan: Fix racy device stats updates.

2024-04-29T12:39:15+00:00

VXLAN devices update their stats locklessly. Therefore these counters should either be stored in per-cpu data structures or the updates should be done using atomic increments. Since the net_device_core_stats infrastructure is already used in vxlan_rcv(), use it for the other rx_dropped and tx_dropped counter updates. Update the other counters atomically using DEV_STATS_INC(). Fixes: d342894c5d2f ("vxlan: virtual extensible lan") Signed-off-by: Guillaume Nault Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller

vxlan: drop packets from invalid src-address

2024-04-19T11:54:33+00:00

The VXLAN driver currently does not check if the inner layer2 source-address is valid. In case source-address snooping/learning is enabled, a entry in the FDB for the invalid address is created with the layer3 address of the tunnel endpoint. If the frame happens to have a non-unicast address set, all this non-unicast traffic is subsequently not flooded to the tunnel network but sent to the learnt host in the FDB. To make matters worse, this FDB entry does not expire. Apply the same filtering for packets as it is done for bridges. This not only drops these invalid packets but avoids them from being learnt into the FDB. Fixes: d342894c5d2f ("vxlan: virtual extensible lan") Suggested-by: Ido Schimmel Signed-off-by: David Bauer Signed-off-by: David S. Miller

vxlan: Remove generic .ndo_get_stats64

2024-03-11T23:01:06+00:00

Commit 3e2f544dd8a33 ("net: get stats64 if device if driver is configured") moved the callback to dev_get_tstats64() to net core, so, unless the driver is doing some custom stats collection, it does not need to set .ndo_get_stats64. Since this driver is now relying in NETDEV_PCPU_STAT_TSTATS, then, it doesn't need to set the dev_get_tstats64() generic .ndo_get_stats64 function pointer. Signed-off-by: Breno Leitao Reviewed-by: Subbaraya Sundeep Link: https://lore.kernel.org/r/20240311112437.3813987-2-leitao@debian.org Signed-off-by: Jakub Kicinski

vxlan: Do not alloc tstats manually

2024-03-11T23:01:06+00:00

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and convert veth & vrf"), stats allocation could be done on net core instead of in this driver. With this new approach, the driver doesn't have to bother with error handling (allocation failure checking, making sure free happens in the right spot, etc). This is core responsibility now. Remove the allocation in the vxlan driver and leverage the network core allocation instead. Signed-off-by: Breno Leitao Reviewed-by: Subbaraya Sundeep Link: https://lore.kernel.org/r/20240311112437.3813987-1-leitao@debian.org Signed-off-by: Jakub Kicinski

net: vxlan: constify the struct device_type usage

2024-02-21T09:45:23+00:00

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver core can properly handle constant struct device_type. Move the vxlan_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Signed-off-by: Ricardo B. Marliere Reviewed-by: Guillaume Nault Signed-off-by: David S. Miller