summaryrefslogtreecommitdiffstats
path: root/net/ipv4
Commit message (Collapse)AuthorAgeFilesLines
* net: diag: support SOCK_DESTROY for UDP socketsDavid Ahern2016-08-232-0/+94
| | | | | | | | | | This implements SOCK_DESTROY for UDP sockets similar to what was done for TCP with commit c1e64e298b8ca ("net: diag: Support destroying TCP sockets.") A process with a UDP socket targeted for destroy is awakened and recvmsg fails with ECONNABORTED. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net-tcp: retire TFO_SERVER_WO_SOCKOPT2 configYuchung Cheng2016-08-231-13/+8
| | | | | | | | | | | | TFO_SERVER_WO_SOCKOPT2 was intended for debugging purposes during Fast Open development. Remove this config option and also update/clean-up the documentation of the Fast Open sysctl. Reported-by: Piotr Jurkiewicz <piotr.jerzy.jurkiewicz@gmail.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ipconfig: Fix NULL pointer dereference on RARP/BOOTP/DHCP timeoutGeert Uytterhoeven2016-08-221-1/+1
| | | | | | | | | | | | | | | If no RARP, BOOTP, or DHCP response is received, ic_dev is never set, causing a NULL pointer dereference in ic_close_devs(): Sending DHCP requests ...... timed out! Unable to handle kernel NULL pointer dereference at virtual address 00000004 To fix this, add a check to avoid dereferencing ic_dev if it is still NULL. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Fixes: 2647cffb2bc6fbed ("net: ipconfig: Support using "delayed" DHCP replies") Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ipv4: fix sparse error in fib_good_nh()Eric Dumazet2016-08-191-1/+2
| | | | | | | | | | | | | | | Fixes following sparse errors : net/ipv4/fib_semantics.c:1579:61: warning: incorrect type in argument 2 (different base types) net/ipv4/fib_semantics.c:1579:61: expected unsigned int [unsigned] [usertype] key net/ipv4/fib_semantics.c:1579:61: got restricted __be32 const [usertype] nh_gw Fixes: a6db4494d218c ("net: ipv4: Consider failed nexthops in multipath routes") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* udp: include addrconf.hEric Dumazet2016-08-191-0/+1
| | | | | | | | | | Include ipv4_rcv_saddr_equal() definition to avoid this sparse error : net/ipv4/udp.c:362:5: warning: symbol 'ipv4_rcv_saddr_equal' was not declared. Should it be static? Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: md5: remove tcp_md5_hash_header()Eric Dumazet2016-08-191-17/+0
| | | | | | | | After commit 19689e38eca5 ("tcp: md5: use kmalloc() backed scratch areas") this function is no longer used. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: refine tcp_prune_ofo_queue() to not drop all packetsEric Dumazet2016-08-181-19/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Over the years, TCP BDP has increased a lot, and is typically in the order of ~10 Mbytes with help of clever Congestion Control modules. In presence of packet losses, TCP stores incoming packets into an out of order queue, and number of skbs sitting there waiting for the missing packets to be received can match the BDP (~10 Mbytes) In some cases, TCP needs to make room for incoming skbs, and current strategy can simply remove all skbs in the out of order queue as a last resort, incurring a huge penalty, both for receiver and sender. Unfortunately these 'last resort events' are quite frequent, forcing sender to send all packets again, stalling the flow and wasting a lot of resources. This patch cleans only a part of the out of order queue in order to meet the memory constraints. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: C. Stephen Gun <csg@google.com> Cc: Van Jacobson <vanj@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: defer sacked assignmentEric Dumazet2016-08-181-1/+2
| | | | | | | | | | | | While chasing tcp_xmit_retransmit_queue() kasan issue, I found that we could avoid reading sacked field of skb that we wont send, possibly removing one cache line miss. Very minor change in slow path, but why not ? ;) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-08-182-1/+31
|\ | | | | | | | | | | | | | | | | Minor overlapping changes for both merge conflicts. Resolution work done by Stephen Rothwell was used as a reference. Signed-off-by: David S. Miller <davem@davemloft.net>
| * gre: set inner_protocol on xmitSimon Horman2016-08-151-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that the inner_protocol is set on transmit so that GSO segmentation, which relies on that field, works correctly. This is achieved by setting the inner_protocol in gre_build_header rather than each caller of that function. It ensures that the inner_protocol is set when gre_fb_xmit() is used to transmit GRE which was not previously the case. I have observed this is not the case when OvS transmits GRE using lwtunnel metadata (which it always does). Fixes: 38720352412a ("gre: Use inner_proto to obtain inner header protocol") Cc: Pravin Shelar <pshelar@ovn.org> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Simon Horman <simon.horman@netronome.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * vti: flush x-netns xfrm cache when vti interface is removedLance Richardson2016-08-091-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When executing the script included below, the netns delete operation hangs with the following message (repeated at 10 second intervals): kernel:unregister_netdevice: waiting for lo to become free. Usage count = 1 This occurs because a reference to the lo interface in the "secure" netns is still held by a dst entry in the xfrm bundle cache in the init netns. Address this problem by garbage collecting the tunnel netns flow cache when a cross-namespace vti interface receives a NETDEV_DOWN notification. A more detailed description of the problem scenario (referencing commands in the script below): (1) ip link add vti_test type vti local 1.1.1.1 remote 1.1.1.2 key 1 The vti_test interface is created in the init namespace. vti_tunnel_init() attaches a struct ip_tunnel to the vti interface's netdev_priv(dev), setting the tunnel net to &init_net. (2) ip link set vti_test netns secure The vti_test interface is moved to the "secure" netns. Note that the associated struct ip_tunnel still has tunnel->net set to &init_net. (3) ip netns exec secure ping -c 4 -i 0.02 -I 192.168.100.1 192.168.200.1 The first packet sent using the vti device causes xfrm_lookup() to be called as follows: dst = xfrm_lookup(tunnel->net, skb_dst(skb), fl, NULL, 0); Note that tunnel->net is the init namespace, while skb_dst(skb) references the vti_test interface in the "secure" namespace. The returned dst references an interface in the init namespace. Also note that the first parameter to xfrm_lookup() determines which flow cache is used to store the computed xfrm bundle, so after xfrm_lookup() returns there will be a cached bundle in the init namespace flow cache with a dst referencing a device in the "secure" namespace. (4) ip netns del secure Kernel begins to delete the "secure" namespace. At some point the vti_test interface is deleted, at which point dst_ifdown() changes the dst->dev in the cached xfrm bundle flow from vti_test to lo (still in the "secure" namespace however). Since nothing has happened to cause the init namespace's flow cache to be garbage collected, this dst remains attached to the flow cache, so the kernel loops waiting for the last reference to lo to go away. <Begin script> ip link add br1 type bridge ip link set dev br1 up ip addr add dev br1 1.1.1.1/8 ip netns add secure ip link add vti_test type vti local 1.1.1.1 remote 1.1.1.2 key 1 ip link set vti_test netns secure ip netns exec secure ip link set vti_test up ip netns exec secure ip link s lo up ip netns exec secure ip addr add dev lo 192.168.100.1/24 ip netns exec secure ip route add 192.168.200.0/24 dev vti_test ip xfrm policy flush ip xfrm state flush ip xfrm policy add dir out tmpl src 1.1.1.1 dst 1.1.1.2 \ proto esp mode tunnel mark 1 ip xfrm policy add dir in tmpl src 1.1.1.2 dst 1.1.1.1 \ proto esp mode tunnel mark 1 ip xfrm state add src 1.1.1.1 dst 1.1.1.2 proto esp spi 1 \ mode tunnel enc des3_ede 0x112233445566778811223344556677881122334455667788 ip xfrm state add src 1.1.1.2 dst 1.1.1.1 proto esp spi 1 \ mode tunnel enc des3_ede 0x112233445566778811223344556677881122334455667788 ip netns exec secure ping -c 4 -i 0.02 -I 192.168.100.1 192.168.200.1 ip netns del secure <End script> Reported-by: Hangbin Liu <haliu@redhat.com> Reported-by: Jan Tluka <jtluka@redhat.com> Signed-off-by: Lance Richardson <lrichard@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipconfig: Fix more use after freeThierry Reding2016-08-171-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | While commit 9c706a49d660 ("net: ipconfig: fix use after free") avoids the use after free, the resulting code still ends up calling both the ic_setup_if() and ic_setup_routes() after calling ic_close_devs(), and access to the device is still required. Move the call to ic_close_devs() to the very end of the function. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipconfig: fix use after freeUwe Kleine-König2016-08-101-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ic_close_devs() calls kfree() for all devices's ic_device. Since commit 2647cffb2bc6 ("net: ipconfig: Support using "delayed" DHCP replies") the active device's ic_device is still used however to print the ipconfig summary which results in an oops if the memory is already changed. So delay freeing until after the autoconfig results are reported. Fixes: 2647cffb2bc6 ("net: ipconfig: Support using "delayed" DHCP replies") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Remove fib_local variableDavid Ahern2016-08-091-7/+0
| | | | | | | | | | | | | | | | After commit 0ddcf43d5d4a ("ipv4: FIB Local/MAIN table collapse") fib_local is set but not used. Remove it. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/multicast: should not send source list records when have filter mode changeHangbin Liu2016-08-081-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on RFC3376 5.1 and RFC3810 6.1 If the per-interface listening change that triggers the new report is a filter mode change, then the next [Robustness Variable] State Change Reports will include a Filter Mode Change Record. This applies even if any number of source list changes occur in that period. Old State New State State Change Record Sent --------- --------- ------------------------ INCLUDE (A) EXCLUDE (B) TO_EX (B) EXCLUDE (A) INCLUDE (B) TO_IN (B) So we should not send source-list change if there is a filter-mode change. Here are two scenarios: 1. Group deleted and filter mode is EXCLUDE, which means we need send a TO_IN { }. 2. Not group deleted, but has pcm->crcount, which means we need send a normal filter-mode-change. At the same time, if the type is ALLOW or BLOCK, and have psf->sf_crcount, we stop add records and decrease sf_crcount directly Reference: https://www.ietf.org/mail-archive/web/magma/current/msg01274.html Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipconfig: drop inter-device timeoutUwe Kleine-König2016-08-081-4/+5
| | | | | | | | | | | | | | | | | | Now that ipconfig learned to handle "delayed replies" in the previous commit, there is no reason any more to delay sending a first request per device. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipconfig: Support using "delayed" DHCP repliesUwe Kleine-König2016-08-081-19/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dhcp code only waits 1s between sending DHCP requests on different devices and only accepts an answer for the device that sent out the last request. Only the timeout at the end of a loop is increased iteratively which favours only the last device. This makes it impossible to work with a dhcp server that takes little more than 1s connected to a device that is not the last one. Instead of also increasing the inter-device timeout, teach the code to handle delayed replies. To accomplish that, make *ic_dev track the current ic_device instead of the current net_device and adapt all users accordingly. The relevant change then is to reset d to ic_dev on a reply to assert that the followup request goes through the right device. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: ipconfig: Add device name to debug messagesUwe Kleine-König2016-08-081-6/+6
|/ | | | | | | | This simplifies understanding what happens when there is more than one device. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: panic in leaf_walk_rcu due to stale node pointerDavid Forster2016-08-061-6/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Panic occurs when issuing "cat /proc/net/route" whilst populating FIB with > 1M routes. Use of cached node pointer in fib_route_get_idx is unsafe. BUG: unable to handle kernel paging request at ffffc90001630024 IP: [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0 PGD 11b08d067 PUD 11b08e067 PMD dac4b067 PTE 0 Oops: 0000 [#1] SMP Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscac snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep virti acpi_cpufreq button parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd tio_ring virtio floppy uhci_hcd ehci_hcd usbcore usb_common libata scsi_mod CPU: 1 PID: 785 Comm: cat Not tainted 4.2.0-rc8+ #4 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 task: ffff8800da1c0bc0 ti: ffff88011a05c000 task.ti: ffff88011a05c000 RIP: 0010:[<ffffffff814cf6a0>] [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0 RSP: 0018:ffff88011a05fda0 EFLAGS: 00010202 RAX: ffff8800d8a40c00 RBX: ffff8800da4af940 RCX: ffff88011a05ff20 RDX: ffffc90001630020 RSI: 0000000001013531 RDI: ffff8800da4af950 RBP: 0000000000000000 R08: ffff8800da1f9a00 R09: 0000000000000000 R10: ffff8800db45b7e4 R11: 0000000000000246 R12: ffff8800da4af950 R13: ffff8800d97a74c0 R14: 0000000000000000 R15: ffff8800d97a7480 FS: 00007fd3970e0700(0000) GS:ffff88011fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffffc90001630024 CR3: 000000011a7e4000 CR4: 00000000000006e0 Stack: ffffffff814d00d3 0000000000000000 ffff88011a05ff20 ffff8800da1f9a00 ffffffff811dd8b9 0000000000000800 0000000000020000 00007fd396f35000 ffffffff811f8714 0000000000003431 ffffffff8138dce0 0000000000000f80 Call Trace: [<ffffffff814d00d3>] ? fib_route_seq_start+0x93/0xc0 [<ffffffff811dd8b9>] ? seq_read+0x149/0x380 [<ffffffff811f8714>] ? fsnotify+0x3b4/0x500 [<ffffffff8138dce0>] ? process_echoes+0x70/0x70 [<ffffffff8121cfa7>] ? proc_reg_read+0x47/0x70 [<ffffffff811bb823>] ? __vfs_read+0x23/0xd0 [<ffffffff811bbd42>] ? rw_verify_area+0x52/0xf0 [<ffffffff811bbe61>] ? vfs_read+0x81/0x120 [<ffffffff811bcbc2>] ? SyS_read+0x42/0xa0 [<ffffffff81549ab2>] ? entry_SYSCALL_64_fastpath+0x16/0x75 Code: 48 85 c0 75 d8 f3 c3 31 c0 c3 f3 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 a 04 89 f0 33 02 44 89 c9 48 d3 e8 0f b6 4a 05 49 89 RIP [<ffffffff814cf6a0>] leaf_walk_rcu+0x10/0xe0 RSP <ffff88011a05fda0> CR2: ffffc90001630024 Signed-off-by: Dave Forster <dforster@brocade.com> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: consider recv buf for the initial window scaleSoheil Hassas Yeganeh2016-07-301-1/+2
| | | | | | | | | | | | | | | | | | | | | tcp_select_initial_window() intends to advertise a window scaling for the maximum possible window size. To do so, it considers the maximum of net.ipv4.tcp_rmem[2] and net.core.rmem_max as the only possible upper-bounds. However, users with CAP_NET_ADMIN can use SO_RCVBUFFORCE to set the socket's receive buffer size to values larger than net.ipv4.tcp_rmem[2] and net.core.rmem_max. Thus, SO_RCVBUFFORCE is effectively ignored by tcp_select_initial_window(). To fix this, consider the maximum of net.ipv4.tcp_rmem[2], net.core.rmem_max and socket's initial buffer space. Fixes: b0573dea1fb3 ("[NET]: Introduce SO_{SND,RCV}BUFFORCE socket options") Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Suggested-by: Neal Cardwell <ncardwell@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'next' of ↵Linus Torvalds2016-07-292-79/+12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem updates from James Morris: "Highlights: - TPM core and driver updates/fixes - IPv6 security labeling (CALIPSO) - Lots of Apparmor fixes - Seccomp: remove 2-phase API, close hole where ptrace can change syscall #" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (156 commits) apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling tpm: Add TPM 2.0 support to the Nuvoton i2c driver (NPCT6xx family) tpm: Factor out common startup code tpm: use devm_add_action_or_reset tpm2_i2c_nuvoton: add irq validity check tpm: read burstcount from TPM_STS in one 32-bit transaction tpm: fix byte-order for the value read by tpm2_get_tpm_pt tpm_tis_core: convert max timeouts from msec to jiffies apparmor: fix arg_size computation for when setprocattr is null terminated apparmor: fix oops, validate buffer size in apparmor_setprocattr() apparmor: do not expose kernel stack apparmor: fix module parameters can be changed after policy is locked apparmor: fix oops in profile_unpack() when policy_db is not present apparmor: don't check for vmalloc_addr if kvzalloc() failed apparmor: add missing id bounds check on dfa verification apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task apparmor: use list_next_entry instead of list_entry_next apparmor: fix refcount race when finding a child profile apparmor: fix ref count leak when profile sha1 hash is read apparmor: check that xindex is in trans_table bounds ...
| * Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux ↵James Morris2016-07-072-79/+12
| |\ | | | | | | | | | into next
| | * ipv6: Allow request socks to contain IPv6 options.Huw Davies2016-06-271-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If set, these will take precedence over the parent's options during both sending and child creation. If they're not set, the parent's options (if any) will be used. This is to allow the security_inet_conn_request() hook to modify the IPv6 options in just the same way that it already may do for IPv4. Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
| | * netlabel: Move bitmap manipulation functions to the NetLabel core.Huw Davies2016-06-271-79/+9
| | | | | | | | | | | | | | | | | | | | | This is to allow the CALIPSO labelling engine to use these. Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2016-07-2732-192/+1196
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull networking updates from David Miller: 1) Unified UDP encapsulation offload methods for drivers, from Alexander Duyck. 2) Make DSA binding more sane, from Andrew Lunn. 3) Support QCA9888 chips in ath10k, from Anilkumar Kolli. 4) Several workqueue usage cleanups, from Bhaktipriya Shridhar. 5) Add XDP (eXpress Data Path), essentially running BPF programs on RX packets as soon as the device sees them, with the option to mirror the packet on TX via the same interface. From Brenden Blanco and others. 6) Allow qdisc/class stats dumps to run lockless, from Eric Dumazet. 7) Add VLAN support to b53 and bcm_sf2, from Florian Fainelli. 8) Simplify netlink conntrack entry layout, from Florian Westphal. 9) Add ipv4 forwarding support to mlxsw spectrum driver, from Ido Schimmel, Yotam Gigi, and Jiri Pirko. 10) Add SKB array infrastructure and convert tun and macvtap over to it. From Michael S Tsirkin and Jason Wang. 11) Support qdisc packet injection in pktgen, from John Fastabend. 12) Add neighbour monitoring framework to TIPC, from Jon Paul Maloy. 13) Add NV congestion control support to TCP, from Lawrence Brakmo. 14) Add GSO support to SCTP, from Marcelo Ricardo Leitner. 15) Allow GRO and RPS to function on macsec devices, from Paolo Abeni. 16) Support MPLS over IPV4, from Simon Horman. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits) xgene: Fix build warning with ACPI disabled. be2net: perform temperature query in adapter regardless of its interface state l2tp: Correctly return -EBADF from pppol2tp_getname. net/mlx5_core/health: Remove deprecated create_singlethread_workqueue net: ipmr/ip6mr: update lastuse on entry change macsec: ensure rx_sa is set when validation is disabled tipc: dump monitor attributes tipc: add a function to get the bearer name tipc: get monitor threshold for the cluster tipc: make cluster size threshold for monitoring configurable tipc: introduce constants for tipc address validation net: neigh: disallow transition to NUD_STALE if lladdr is unchanged in neigh_update() MAINTAINERS: xgene: Add driver and documentation path Documentation: dtb: xgene: Add MDIO node dtb: xgene: Add MDIO node drivers: net: xgene: ethtool: Use phy_ethtool_gset and sset drivers: net: xgene: Use exported functions drivers: net: xgene: Enable MDIO driver drivers: net: xgene: Add backward compatibility drivers: net: phy: xgene: Add MDIO driver ...
| * | | net: ipmr/ip6mr: update lastuse on entry changeNikolay Aleksandrov2016-07-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently lastuse is updated on entry creation and cache hit, but it should also be updated on entry change. Since both on add and update the ttl array is updated we can simply update the lastuse in ipmr_update_thresholds. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Donald Sharp <sharpd@cumulusnetworks.com> CC: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | udp: use sk_filter_trim_cap for udp{,6}_queue_rcv_skbDaniel Borkmann2016-07-251-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After a612769774a3 ("udp: prevent bugcheck if filter truncates packet too much"), there followed various other fixes for similar cases such as f4979fcea7fd ("rose: limit sk_filter trim to payload"). Latter introduced a new helper sk_filter_trim_cap(), where we can pass the trim limit directly to the socket filter handling. Make use of it here as well with sizeof(struct udphdr) as lower cap limit and drop the extra skb->len test in UDP's input path. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2016-07-243-47/+59
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next The following patchset contains Netfilter/IPVS updates for net-next, they are: 1) Count pre-established connections as active in "least connection" schedulers such that pre-established connections to avoid overloading backend servers on peak demands, from Michal Kubecek via Simon Horman. 2) Address a race condition when resizing the conntrack table by caching the bucket size when fulling iterating over the hashtable in these three possible scenarios: 1) dump via /proc/net/nf_conntrack, 2) unlinking userspace helper and 3) unlinking custom conntrack timeout. From Liping Zhang. 3) Revisit early_drop() path to perform lockless traversal on conntrack eviction under stress, use del_timer() as synchronization point to avoid two CPUs evicting the same entry, from Florian Westphal. 4) Move NAT hlist_head to nf_conn object, this simplifies the existing NAT extension and it doesn't increase size since recent patches to align nf_conn, from Florian. 5) Use rhashtable for the by-source NAT hashtable, also from Florian. 6) Don't allow --physdev-is-out from OUTPUT chain, just like --physdev-out is not either, from Hangbin Liu. 7) Automagically set on nf_conntrack counters if the user tries to match ct bytes/packets from nftables, from Liping Zhang. 8) Remove possible_net_t fields in nf_tables set objects since we just simply pass the net pointer to the backend set type implementations. 9) Fix possible off-by-one in h323, from Toby DiPasquale. 10) early_drop() may be called from ctnetlink patch, so we must hold rcu read size lock from them too, this amends Florian's patch #3 coming in this batch, from Liping Zhang. 11) Use binary search to validate jump offset in x_tables, this addresses the O(n!) validation that was introduced recently resolve security issues with unpriviledge namespaces, from Florian. 12) Fix reference leak to connlabel in error path of nft_ct, from Zhang. 13) Three updates for nft_log: Fix log prefix leak in error path. Bail out on loglevel larger than debug in nft_log and set on the new NF_LOG_F_COPY_LEN flag when snaplen is specified. Again from Zhang. 14) Allow to filter rule dumps in nf_tables based on table and chain names. 15) Simplify connlabel to always use 128 bits to store labels and get rid of unused function in xt_connlabel, from Florian. 16) Replace set_expect_timeout() by mod_timer() from the h323 conntrack helper, by Gao Feng. 17) Put back x_tables module reference in nft_compat on error, from Liping Zhang. 18) Add a reference count to the x_tables extensions cache in nft_compat, so we can remove them when unused and avoid a crash if the extensions are rmmod, again from Zhang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | netfilter: x_tables: speed up jump target validationFlorian Westphal2016-07-182-43/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dummy ruleset I used to test the original validation change was broken, most rules were unreachable and were not tested by mark_source_chains(). In some cases rulesets that used to load in a few seconds now require several minutes. sample ruleset that shows the behaviour: echo "*filter" for i in $(seq 0 100000);do printf ":chain_%06x - [0:0]\n" $i done for i in $(seq 0 100000);do printf -- "-A INPUT -j chain_%06x\n" $i printf -- "-A INPUT -j chain_%06x\n" $i printf -- "-A INPUT -j chain_%06x\n" $i done echo COMMIT [ pipe result into iptables-restore ] This ruleset will be about 74mbyte in size, with ~500k searches though all 500k[1] rule entries. iptables-restore will take forever (gave up after 10 minutes) Instead of always searching the entire blob for a match, fill an array with the start offsets of every single ipt_entry struct, then do a binary search to check if the jump target is present or not. After this change ruleset restore times get again close to what one gets when reverting 36472341017529e (~3 seconds on my workstation). [1] every user-defined rule gets an implicit RETURN, so we get 300k jumps + 100k userchains + 100k returns -> 500k rule entries Fixes: 36472341017529e ("netfilter: x_tables: validate targets of jumps") Reported-by: Jeff Wu <wujiafu@gmail.com> Tested-by: Jeff Wu <wujiafu@gmail.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| | * | | netfilter: conntrack: fix race between nf_conntrack proc read and hash resizeLiping Zhang2016-07-111-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we do "cat /proc/net/nf_conntrack", and meanwhile resize the conntrack hash table via /sys/module/nf_conntrack/parameters/hashsize, race will happen, because reader can observe a newly allocated hash but the old size (or vice versa). So oops will happen like follows： BUG: unable to handle kernel NULL pointer dereference at 0000000000000017 IP: [<ffffffffa0418e21>] seq_print_acct+0x11/0x50 [nf_conntrack] Call Trace: [<ffffffffa0412f4e>] ? ct_seq_show+0x14e/0x340 [nf_conntrack] [<ffffffff81261a1c>] seq_read+0x2cc/0x390 [<ffffffff812a8d62>] proc_reg_read+0x42/0x70 [<ffffffff8123bee7>] __vfs_read+0x37/0x130 [<ffffffff81347980>] ? security_file_permission+0xa0/0xc0 [<ffffffff8123cf75>] vfs_read+0x95/0x140 [<ffffffff8123e475>] SyS_read+0x55/0xc0 [<ffffffff817c2572>] entry_SYSCALL_64_fastpath+0x1a/0xa4 It is very easy to reproduce this kernel crash. 1. open one shell and input the following cmds: while : ; do echo $RANDOM > /sys/module/nf_conntrack/parameters/hashsize done 2. open more shells and input the following cmds: while : ; do cat /proc/net/nf_conntrack done 3. just wait a monent, oops will happen soon. The solution in this patch is based on Florian's Commit 5e3c61f98175 ("netfilter: conntrack: fix lookup race during hash resize"). And add a wrapper function nf_conntrack_get_ht to get hash and hsize suggested by Florian Westphal. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-07-243-22/+40
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Just several instances of overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | net: ip_finish_output_gso: If skb_gso_network_seglen exceeds MTU, allow ↵Shmulik Ladkani2016-07-191-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | segmentation for local udp tunneled skbs Given: - tap0 and vxlan0 are bridged - vxlan0 stacked on eth0, eth0 having small mtu (e.g. 1400) Assume GSO skbs arriving from tap0 having a gso_size as determined by user-provided virtio_net_hdr (e.g. 1460 corresponding to VM mtu of 1500). After encapsulation these skbs have skb_gso_network_seglen that exceed eth0's ip_skb_dst_mtu. These skbs are accidentally passed to ip_finish_output2 AS IS. Alas, each final segment (segmented either by validate_xmit_skb or by hardware UFO) would be larger than eth0 mtu. As a result, those above-mtu segments get dropped on certain networks. This behavior is not aligned with the NON-GSO case: Assume a non-gso 1500-sized IP packet arrives from tap0. After encapsulation, the vxlan datagram is fragmented normally at the ip_finish_output-->ip_fragment code path. The expected behavior for the GSO case would be segmenting the "gso-oversized" skb first, then fragmenting each segment according to dst mtu, and finally passing the resulting fragments to ip_finish_output2. 'ip_finish_output_gso' already supports this "Slowpath" behavior, according to the IPSKB_FRAG_SEGS flag, which is only set during ipv4 forwarding (not set in the bridged case). In order to support the bridged case, we'll mark skbs arriving from an ingress interface that get udp-encaspulated as "allowed to be fragmented", causing their network_seglen to be validated by 'ip_finish_output_gso' (and fragment if needed). Note the TUNNEL_DONT_FRAGMENT tun_flag is still honoured (both in the gso and non-gso cases), which serves users wishing to forbid fragmentation at the udp tunnel endpoint. Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | net/ipv4: Introduce IPSKB_FRAG_SEGS bit to inet_skb_parm.flagsShmulik Ladkani2016-07-193-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This flag indicates whether fragmentation of segments is allowed. Formerly this policy was hardcoded according to IPSKB_FORWARDED (set by either ip_forward or ipmr_forward). Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | net: ipmr/ip6mr: add support for keeping an entry ageNikolay Aleksandrov2016-07-161-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for hardware offloading of ipmr/ip6mr we need an interface that allows to check (and later update) the age of entries. Relying on stats alone can show activity but not actual age of the entry, furthermore when there're tens of thousands of entries a lot of the hardware implementations only support "hit" bits which are cleared on read to denote that the entry was active and shouldn't be aged out, these can then be naturally translated into age timestamp and will be compatible with the software forwarding age. Using a lastuse entry doesn't affect performance because the members in that cache line are written to along with the age. Since all new users are encouraged to use ipmr via netlink, this is exported via the RTA_EXPIRES attribute. Also do a minor local variable declaration style adjustment - arrange them longest to shortest. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Shrijeet Mukherjee <shm@cumulusnetworks.com> CC: Satish Ashok <sashok@cumulusnetworks.com> CC: Donald Sharp <sharpd@cumulusnetworks.com> CC: David S. Miller <davem@davemloft.net> CC: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> CC: James Morris <jmorris@namei.org> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | tcp_timer.c: Add kernel-doc function descriptionsRichard Sailer2016-07-151-17/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds kernel-doc style descriptions for 6 functions and fixes 1 typo. Signed-off-by: Richard Sailer <richard@weltraumpflege.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | ipv4: af_inet: make it explicitly non-modularPaul Gortmaker2016-07-111-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Makefile controlling compilation of this file is obj-y, meaning that it currently is never being built as a module. Since MODULE_ALIAS is a no-op for non-modular code, we can simply remove the MODULE_ALIAS_NETPROTO variant used here. We replace module.h with kmod.h since the file does make use of request_module() in order to load other modules from here. We don't have to worry about init.h coming in via the removed module.h since the file explicitly includes init.h already. Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Cc: netdev@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | tunnels: correct conditional build of MPLS and IPv6Simon Horman2016-07-111-12/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using a combination if #if conditionals and goto labels to unwind tunnel4_init seems unwieldy. This patch takes a simpler approach of directly unregistering previously registered protocols when an error occurs. This fixes a number of problems with the current implementation including the potential presence of labels when they are unused and the potential absence of unregister code when it is needed. Fixes: 8afe97e5d416 ("tunnels: support MPLS over IPv4 tunnels") Signed-off-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | ipv4: do not abuse GFP_ATOMIC in inet_netconf_notify_devconf()Eric Dumazet2016-07-091-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | inet_forward_change() runs with RTNL held. We are allowed to sleep if required. If we use __in_dev_get_rtnl() instead of __in_dev_get_rcu(), we no longer have to use GFP_ATOMIC allocations in inet_netconf_notify_devconf(), meaning we are less likely to miss notifications under memory pressure, and wont touch precious memory reserves either and risk dropping incoming packets. inet_netconf_get_devconf() can also use GFP_KERNEL allocation. Fixes: edc9e748934c ("rtnl/ipv4: use netconf msg to advertise forwarding status") Fixes: 9e5511106f99 ("rtnl/ipv4: add support of RTM_GETNETCONF") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | ipip: support MPLS over IPv4Simon Horman2016-07-091-16/+121
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend the IPIP driver to support MPLS over IPv4. The implementation is an extension of existing support for IPv4 over IPv4 and is based of multiple inner-protocol support for the SIT driver. Signed-off-by: Simon Horman <simon.horman@netronome.com> Reviewed-by: Dinan Gunawardena <dinan.gunawardena@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | tunnels: support MPLS over IPv4 tunnelsSimon Horman2016-07-091-10/+67
| | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend tunnel support to MPLS over IPv4. The implementation extends the existing differentiation between IPIP and IPv6 over IPv4 to also cover MPLS over IPv4. Signed-off-by: Simon Horman <simon.horman@netronome.com> Reviewed-by: Dinan Gunawardena <dinan.gunawardena@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-07-061-2/+2
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/ethernet/mellanox/mlx5/core/en.h drivers/net/ethernet/mellanox/mlx5/core/en_main.c drivers/net/usb/r8152.c All three conflicts were overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
| * \ \ \ \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2016-07-064-36/+32
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next, they are: 1) Don't use userspace datatypes in bridge netfilter code, from Tobin Harding. 2) Iterate only once over the expectation table when removing the helper module, instead of once per-netns, from Florian Westphal. 3) Extra sanitization in xt_hook_ops_alloc() to return error in case we ever pass zero hooks, xt_hook_ops_alloc(): 4) Handle NFPROTO_INET from the logging core infrastructure, from Liping Zhang. 5) Autoload loggers when TRACE target is used from rules, this doesn't change the behaviour in case the user already selected nfnetlink_log as preferred way to print tracing logs, also from Liping Zhang. 6) Conntrack slabs with SLAB_HWCACHE_ALIGN to allow rearranging fields by cache lines, increases the size of entries in 11% per entry. From Florian Westphal. 7) Skip zone comparison if CONFIG_NF_CONNTRACK_ZONES=n, from Florian. 8) Remove useless defensive check in nf_logger_find_get() from Shivani Bhardwaj. 9) Remove zone extension as place it in the conntrack object, this is always include in the hashing and we expect more intensive use of zones since containers are in place. Also from Florian Westphal. 10) Owner match now works from any namespace, from Eric Bierdeman. 11) Make sure we only reply with TCP reset to TCP traffic from nf_reject_ipv4, patch from Liping Zhang. 12) Introduce --nflog-size to indicate amount of network packet bytes that are copied to userspace via log message, from Vishwanath Pai. This obsoletes --nflog-range that has never worked, it was designed to achieve this but it has never worked. 13) Introduce generic macros for nf_tables object generation masks. 14) Use generation mask in table, chain and set objects in nf_tables. This allows fixes interferences with ongoing preparation phase of the commit protocol and object listings going on at the same time. This update is introduced in three patches, one per object. 15) Check if the object is active in the next generation for element deactivation in the rbtree implementation, given that deactivation happens from the commit phase path we have to observe the future status of the object. 16) Support for deletion of just added elements in the hash set type. 17) Allow to resize hashtable from /proc entry, not only from the obscure /sys entry that maps to the module parameter, from Florian Westphal. 18) Get rid of NFT_BASECHAIN_DISABLED, this code is not exercised anymore since we tear down the ruleset whenever the netdevice goes away. 19) Support for matching inverted set lookups, from Arturo Borrero. 20) Simplify the iptables_mangle_hook() by removing a superfluous extra branch. 21) Introduce ether_addr_equal_masked() and use it from the netfilter codebase, from Joe Perches. 22) Remove references to "Use netfilter MARK value as routing key" from the Netfilter Kconfig description given that this toggle doesn't exists already for 10 years, from Moritz Sichert. 23) Introduce generic NF_INVF() and use it from the xtables codebase, from Joe Perches. 24) Setting logger to NONE via /proc was not working unless explicit nul-termination was included in the string. This fixes seems to leave the former behaviour there, so we don't break backward. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | | | netfilter: Convert FWINV<[foo]> macros and uses to NF_INVFJoe Perches2016-07-032-32/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | netfilter uses multiple FWINV #defines with identical form that hide a specific structure variable and dereference it with a invflags member. $ git grep "#define FWINV" include/linux/netfilter_bridge/ebtables.h:#define FWINV(bool,invflg) ((bool) ^ !!(info->invflags & invflg)) net/bridge/netfilter/ebtables.c:#define FWINV2(bool, invflg) ((bool) ^ !!(e->invflags & invflg)) net/ipv4/netfilter/arp_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(arpinfo->invflags & (invflg))) net/ipv4/netfilter/ip_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg))) net/ipv6/netfilter/ip6_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(ip6info->invflags & (invflg))) net/netfilter/xt_tcpudp.c:#define FWINVTCP(bool, invflg) ((bool) ^ !!(tcpinfo->invflags & (invflg))) Consolidate these macros into a single NF_INVF macro. Miscellanea: o Neaten the alignment around these uses o A few lines are > 80 columns for intelligibility Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| | * | | | | netfilter: x_tables: simplify ip{6}table_mangle_hook()Pablo Neira Ayuso2016-07-011-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No need for a special case to handle NF_INET_POST_ROUTING, this is basically the same handling as for prerouting, input, forward. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| | * | | | | netfilter: nf_reject_ipv4: don't send tcp RST if the packet is non-TCPLiping Zhang2016-06-241-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In iptables, if the user add a rule to send tcp RST and specify the non-TCP protocol, such as UDP, kernel will reject this request. But in nftables, this validity check only occurs in nft tool, i.e. only in userspace. This means that user can add such a rule like follows via nfnetlink: "nft add rule filter forward ip protocol udp reject with tcp reset" This will generate some confusing tcp RST packets. So we should send tcp RST only when it is TCP packet. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | | | | | tcp: md5: use kmalloc() backed scratch areasEric Dumazet2016-07-012-17/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some arches have virtually mapped kernel stacks, or will soon have. tcp_md5_hash_header() uses an automatic variable to copy tcp header before mangling th->check and calling crypto function, which might be problematic on such arches. David says that using percpu storage is also problematic on non SMP builds. Just use kmalloc() to allocate scratch areas. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | | tcp: add an ability to dump and restore window parametersAndrey Vagin2016-06-301-0/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We found that sometimes a restored tcp socket doesn't work. A reason of this bug is incorrect window parameters and in this case tcp_acceptable_seq() returns tcp_wnd_end(tp) instead of tp->snd_nxt. The other side drops packets with this seq, because seq is less than tp->rcv_nxt ( tcp_sequence() ). Data from a send queue is sent only if there is enough space in a window, so when we restore unacked data, we need to expand a window to fit this data. This was in a first version of this patch: "tcp: extend window to fit all restored unacked data in a send queue" Then Alexey recommended me to restore window parameters instead of adjusted them according with data in a sent queue. This sounds resonable. rcv_wnd has to be restored, because it was reported to another side and the offered window is never shrunk. One of reasons why we need to restore snd_wnd was described above. Cc: Pavel Emelyanov <xemul@parallels.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-06-307-98/+85
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several cases of overlapping changes, except the packet scheduler conflicts which deal with the addition of the free list parameter to qdisc_enqueue(). Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | | | net: diag: Add support to filter on device indexDavid Ahern2016-06-281-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support to inet_diag facility to filter sockets based on device index. If an interface index is in the filter only sockets bound to that index (sk_bound_dev_if) are returned. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | | | ipv6: RFC 4884 partial support for SIT/GRE tunnelsEric Dumazet2016-06-181-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When receiving an ICMPv4 message containing extensions as defined in RFC 4884, and translating it to ICMPv6 at SIT or GRE tunnel, we need some extra manipulation in order to properly forward the extensions. This patch only takes care of Time Exceeded messages as they are the ones that typically carry information from various routers in a fabric during a traceroute session. It also avoids complex skb logic if the data_len is not a multiple of 8. RFC states : The "original datagram" field MUST contain at least 128 octets. If the original datagram did not contain 128 octets, the "original datagram" field MUST be zero padded to 128 octets. In practice routers use 128 bytes of original datagram, not more. Initial translation was added in commit ca15a078bd90 ("sit: generate icmpv6 error when receiving icmpv4 error") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Oussama Ghorbel <ghorbel@pivasoftware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
OpenPOWER on IntegriCloud