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* Merge tag 'v5.2-rc4' into mauroJonathan Corbet2019-06-149-30/+553
|\ | | | | | | | | We need to pick up post-rc1 changes to various document files so they don't get lost in Mauro's massive RST conversion push.
| * Documentation: add TLS offload documentationJakub Kicinski2019-05-226-0/+488
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Describe existing kernel TLS offload (added back in Linux 4.19) - the mechanism, the expected behavior and the notable corner cases. This documentation is mostly targeting hardware vendors who want to implement offload, to ensure consistency between implementations. v2: - add emphasis around TLS_SW/TLS_HW/TLS_HW_RECORD; - remove mentions of ongoing work (Boris); - split the flow of data in SW vs. HW cases in TX overview (Boris); - call out which fields are updated by the device and which are filled by the stack (Boris); - move error handling into it's own section (Boris); - add more words about fallback (Boris); - note that checksum validation is required (Alexei); - note that drivers shouldn't pay attention to the TLS device features. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Dave Watson <davejwatson@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Boris Pismenny <borisp@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * Documentation: tls: RSTify the ktls documentationJakub Kicinski2019-05-222-13/+30
| | | | | | | | | | | | | | | | | | | | Convert the TLS doc to RST. Use C code blocks for the code samples, and mark hyperlinks. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Dave Watson <davejwatson@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * Documentation: net: move device drivers docs to a submenuJakub Kicinski2019-05-222-13/+31
| | | | | | | | | | | | | | | | | | | | | | Some of the device drivers have really long document titles making the networking table of contents hard to look through. Place vendor drivers under a submenu. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Dave Watson <davejwatson@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * net-next: net: Fix typos in ip-sysctl.txtMasanari Iida2019-05-211-2/+2
| | | | | | | | | | | | | | This patch fixes some spelling typos found in ip-sysctl.txt Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * networking: : fix typos in code commentsWeitao Hou2019-05-211-2/+2
| | | | | | | | | | | | | | fix accelleration to acceleration Signed-off-by: Weitao Hou <houweitaoo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | docs: net: dpio-driver.rst: fix two codeblock warningsMauro Carvalho Chehab2019-06-081-2/+2
| | | | | | | | | | | | | | | | Documentation/networking/device_drivers/freescale/dpaa2/dpio-driver.rst:43: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/networking/device_drivers/freescale/dpaa2/dpio-driver.rst:63: WARNING: Unexpected indentation. looking for now-outdated files... none found Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: net: sja1105.rst: fix table formatMauro Carvalho Chehab2019-06-081-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a table there with produces two warnings when built with Sphinx: Documentation/networking/dsa/sja1105.rst:91: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/networking/dsa/sja1105.rst:91: WARNING: Block quote ends without a blank line; unexpected unindent. It will still produce a table, but the html output is wrong, as it won't interpret the second line as the continuation for the first ones, because identation doesn't match. After the change, the output looks a way better and we got rid of two warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: net: dsa: Grammar s/the its/its/Geert Uytterhoeven2019-06-071-2/+2
|/ | | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* rxrpc: Allow the kernel to mark a call as being non-interruptibleDavid Howells2019-05-161-1/+10
| | | | | | | | | | | | | | | | | | | Allow kernel services using AF_RXRPC to indicate that a call should be non-interruptible. This allows kafs to make things like lock-extension and writeback data storage calls non-interruptible. If this is set, signals will be ignored for operations on that call where possible - such as waiting to get a call channel on an rxrpc connection. It doesn't prevent UDP sendmsg from being interrupted, but that will be handled by packet retransmission. rxrpc_kernel_recv_data() isn't affected by this since that never waits, preferring instead to return -EAGAIN and leave the waiting to the caller. Userspace initiated calls can't be set to be uninterruptible at this time. Signed-off-by: David Howells <dhowells@redhat.com>
* rxrpc: Provide kernel interface to set max lifespan on a callDavid Howells2019-05-161-0/+10
| | | | | | | Provide an interface to set max lifespan on a call from inside of the kernel without having to call kernel_sendmsg(). Signed-off-by: David Howells <dhowells@redhat.com>
* Documentation: net: dsa: sja1105: Add info about supported traffic modesVladimir Oltean2019-05-061-0/+54
| | | | | | | | | This adds a table which illustrates what combinations of management / regular traffic work depending on the state the switch ports are in. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Documentation: net: dsa: Add details about NXP SJA1105 driverVladimir Oltean2019-05-032-0/+167
| | | | | Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-05-032-1/+3
|\ | | | | | | | | | | Three trivial overlapping conflicts. Signed-off-by: David S. Miller <davem@davemloft.net>
| * Documentation: fix netdev-FAQ.rst markup warningRandy Dunlap2019-05-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix ReST underline warning: ./Documentation/networking/netdev-FAQ.rst:135: WARNING: Title underline too short. Q: I made changes to only a few patches in a patch series should I resend only those changed? -------------------------------------------------------------------------------------------- Fixes: ffa91253739c ("Documentation: networking: Update netdev-FAQ regarding patches") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * Merge branch 'master' of ↵David S. Miller2019-04-301-0/+2
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec Steffen Klassert says: ==================== pull request (net): ipsec 2019-04-30 1) Fix an out-of-bound array accesses in __xfrm_policy_unlink. From YueHaibing. 2) Reset the secpath on failure in the ESP GRO handlers to avoid dereferencing an invalid pointer on error. From Myungho Jung. 3) Add and revert a patch that tried to add rcu annotations to netns_xfrm. From Su Yanjun. 4) Wait for rcu callbacks before freeing xfrm6_tunnel_spi_kmem. From Su Yanjun. 5) Fix forgotten vti4 ipip tunnel deregistration. From Jeremy Sowden: 6) Remove some duplicated log messages in vti4. From Jeremy Sowden. 7) Don't use IPSEC_PROTO_ANY when flushing states because this will flush only IPsec portocol speciffic states. IPPROTO_ROUTING states may remain in the lists when doing net exit. Fix this by replacing IPSEC_PROTO_ANY with zero. From Cong Wang. 8) Add length check for UDP encapsulation to fix "Oversized IP packet" warnings on receive side. From Sabrina Dubroca. 9) Fix xfrm interface lookup when the interface is associated to a vrf layer 3 master device. From Martin Willi. 10) Reload header pointers after pskb_may_pull() in _decode_session4(), otherwise we may read from uninitialized memory. 11) Update the documentation about xfrm[46]_gc_thresh, it is not used anymore after the flowcache removal. From Nicolas Dichtel. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * xfrm: update doc about xfrm[46]_gc_threshNicolas Dichtel2019-04-121-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Those entries are not used anymore. CC: Florian Westphal <fw@strlen.de> Fixes: 09c7570480f7 ("xfrm: remove flow cache") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-04-262-2/+1
|\| | | | | | | | | | | | | | | | | Two easy cases of overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Documentation: decnet: remove reference to CONFIG_DECNET_ROUTE_FWMARKCorentin Labbe2019-04-211-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_DECNET_ROUTE_FWMARK was removed in commit 47dcf0cb1005 ("[NET]: Rethink mark field in struct flowi") Since nothing replace it (and nothindg need to replace it, simply remove it from documentation. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | ipv4: set the tcp_min_rtt_wlen range from 0 to one dayZhangXiaoxu2019-04-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a UBSAN report as below: UBSAN: Undefined behaviour in net/ipv4/tcp_input.c:2877:56 signed integer overflow: 2147483647 * 1000 cannot be represented in type 'int' CPU: 3 PID: 0 Comm: swapper/3 Not tainted 5.1.0-rc4-00058-g582549e #1 Call Trace: <IRQ> dump_stack+0x8c/0xba ubsan_epilogue+0x11/0x60 handle_overflow+0x12d/0x170 ? ttwu_do_wakeup+0x21/0x320 __ubsan_handle_mul_overflow+0x12/0x20 tcp_ack_update_rtt+0x76c/0x780 tcp_clean_rtx_queue+0x499/0x14d0 tcp_ack+0x69e/0x1240 ? __wake_up_sync_key+0x2c/0x50 ? update_group_capacity+0x50/0x680 tcp_rcv_established+0x4e2/0xe10 tcp_v4_do_rcv+0x22b/0x420 tcp_v4_rcv+0xfe8/0x1190 ip_protocol_deliver_rcu+0x36/0x180 ip_local_deliver+0x15b/0x1a0 ip_rcv+0xac/0xd0 __netif_receive_skb_one_core+0x7f/0xb0 __netif_receive_skb+0x33/0xc0 netif_receive_skb_internal+0x84/0x1c0 napi_gro_receive+0x2a0/0x300 receive_buf+0x3d4/0x2350 ? detach_buf_split+0x159/0x390 virtnet_poll+0x198/0x840 ? reweight_entity+0x243/0x4b0 net_rx_action+0x25c/0x770 __do_softirq+0x19b/0x66d irq_exit+0x1eb/0x230 do_IRQ+0x7a/0x150 common_interrupt+0xf/0xf </IRQ> It can be reproduced by: echo 2147483647 > /proc/sys/net/ipv4/tcp_min_rtt_wlen Fixes: f672258391b42 ("tcp: track min RTT using windowed min-filter") Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller2019-04-232-127/+0
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Alexei Starovoitov says: ==================== pull-request: bpf-next 2019-04-22 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) allow stack/queue helpers from more bpf program types, from Alban. 2) allow parallel verification of root bpf programs, from Alexei. 3) introduce bpf sysctl hook for trusted root cases, from Andrey. 4) recognize var/datasec in btf deduplication, from Andrii. 5) cpumap performance optimizations, from Jesper. 6) verifier prep for alu32 optimization, from Jiong. 7) libbpf xsk cleanup, from Magnus. 8) other various fixes and cleanups. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | bpf: move BPF_PROG_TYPE_FLOW_DISSECTOR documentation to a new common placeStanislav Fomichev2019-04-192-127/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit da7031491786 ("bpf: Document BPF_PROG_TYPE_CGROUP_SYSCTL") Andrey proposes to put per-prog type docs under Documentation/bpf/ Let's move flow dissector documentation there as well. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* | | | ipv6: Add rate limit mask for ICMPv6 messagesStephen Suryaputra2019-04-191-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To make ICMPv6 closer to ICMPv4, add ratemask parameter. Since the ICMP message types use larger numeric values, a simple bitmask doesn't fit. I use large bitmap. The input and output are the in form of list of ranges. Set the default to rate limit all error messages but Packet Too Big. For Packet Too Big, use ratemask instead of hard-coded. There are functions where icmpv6_xrlim_allow() and icmpv6_global_allow() aren't called. This patch only adds them to icmpv6_echo_reply(). Rate limiting error messages is mandated by RFC 4443 but RFC 4890 says that it is also acceptable to rate limit informational messages. Thus, I removed the current hard-coded behavior of icmpv6_mask_allow() that doesn't rate limit informational messages. v2: Add dummy function proc_do_large_bitmap() if CONFIG_PROC_SYSCTL isn't defined, expand the description in ip-sysctl.txt and remove unnecessary conditional before kfree(). v3: Inline the bitmap instead of dynamically allocated. Still is a pointer to it is needed because of the way proc_do_large_bitmap work. Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-04-171-7/+9
|\ \ \ \ | | |/ / | |/| | | | | | | | | | | | | | Conflict resolution of af_smc.c from Stephen Rothwell. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | rxrpc: Make rxrpc_kernel_check_life() indicate if call completedMarc Dionne2019-04-131-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make rxrpc_kernel_check_life() pass back the life counter through the argument list and return true if the call has not yet completed. Suggested-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Documentation: net: dsa: transition to the rst formatIoana Ciornei2019-04-135-154/+169
| |/ / |/| | | | | | | | | | | | | | | | | | | | | | | This patch also performs some minor adjustments such as numbering for the receive path sequence, conversion of keywords to inline literals and adding an index page so it looks better in the output of 'make htmldocs'. Signed-off-by: Ioana Ciornei <ciorneiioana@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Documentation: networking: devlink-info-versions: Add fw.psidShalom Toledo2019-04-091-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add firmware parameter id (fw.psid). Signed-off-by: Shalom Toledo <shalomt@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-04-052-0/+127
|\| | | | | | | | | | | | | | | | | | | | | | | | | | Minor comment merge conflict in mlx5. Staging driver has a fixup due to the skb->xmit_more changes in 'net-next', but was removed in 'net'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | flow_dissector: rst'ify documentationStanislav Fomichev2019-04-043-115/+127
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename bpf_flow_dissector.txt to bpf_flow_dissector.rst and fix formatting. Also, link it from the Documentation/networking/index.rst. Tested with 'make htmldocs' to make sure it looks reasonable. Fixes: ae82899bbe92 ("flow_dissector: document BPF flow dissector environment") Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
| * | flow_dissector: document BPF flow dissector environmentStanislav Fomichev2019-04-031-0/+115
| | | | | | | | | | | | | | | | | | | | | | | | Short doc on what BPF flow dissector should expect in the input __sk_buff and flow_keys. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
* | | Merge tag 'batadv-next-for-davem-20190328' of ↵David S. Miller2019-03-281-82/+28
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.open-mesh.org/linux-merge Simon Wunderlich says: ==================== This feature/cleanup patchset includes the following patches: - Drop license boilerplate (obsoleted by SPDX license IDs), by Sven Eckelmann - Drop documentation for sysfs and debugfs Documentation, by Sven Eckelmann (2 patches) - Mark sysfs as optional and deprecated, by Sven Eckelmann (3 patches) - Update MAINTAINERS Tree, Chat and Bugtracker, by Sven Eckelmann (3 patches) - Rename batadv_dat_send_data, by Sven Eckelmann - update DAT entries with incoming ARP replies, by Linus Luessing - add multicast-to-unicast support for limited destinations, by Linus Luessing ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | batman-adv: Drop documentation about sysfs filesSven Eckelmann2019-03-251-67/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sysfs files will be marked as deprecated in the near future. They are already replaced by the batadv generic netlink family. The documentation should not advertise its usage anymore and instead promote the generic netlink family and a userspace tool to access it. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
| * | | batman-adv: Drop documentation about debugfs filesSven Eckelmann2019-03-251-20/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The debugfs files were marked as deprecated by commit 00caf6a2b318 ("batman-adv: Mark debugfs functionality as deprecated"). The documentation should not advertise its usage anymore and instead promote the generic netlink family and a userspace tool to access it. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-03-281-4/+4
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| * | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller2019-03-211-4/+4
| |\ \ \ | | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for your net tree: 1) Remove a direct dependency with IPv6 introduced by the sip_external_media feature, from Alin Nastac. 2) Fix bogus ENOENT when removing interval elements from set. 3) Set transport_header from br_netfilter to mimic the stack behaviour, this partially fixes a checksum validation bug from the SCTP connection tracking, from Xin Long. 4) Fix undefined reference to symbol in xt_TEE, due to missing Kconfig dependencies, from Arnd Bergmann. 5) Check for NULL in skb_header_pointer() calls in ip6t_shr, from Kangjie Lu. 6) Fix bogus EBUSY when removing an existing conntrack helper from a transaction. 7) Fix module autoload of the redirect extension. 8) Remove duplicated transition in flowtable diagram in the existing documentation. 9) Missing .release_ops call from error path in newrule() which results module refcount leak, from Taehee Yoo. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | netfilter: nf_flowtable: remove duplicated transition in diagramPablo Neira Ayuso2019-03-191-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No direct transition from prerouting to forward hook, routing lookup needs to happen first. Fixes: 19b351f16fd9 ("netfilter: add flowtable documentation") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | | ipv4: Allow amount of dirty memory from fib resizing to be controllableDavid Ahern2019-03-211-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fib_trie implementation calls synchronize_rcu when a certain amount of pages are dirty from freed entries. The number of pages was determined experimentally in 2009 (commit c3059477fce2d). At the current setting, synchronize_rcu is called often -- 51 times in a second in one test with an average of an 8 msec delay adding a fib entry. The total impact is a lot of slow down modifying the fib. This is seen in the output of 'time' - the difference between real time and sys+user. For example, using 720,022 single path routes and 'ip -batch'[1]: $ time ./ip -batch ipv4/routes-1-hops real 0m14.214s user 0m2.513s sys 0m6.783s So roughly 35% of the actual time to install the routes is from the ip command getting scheduled out, most notably due to synchronize_rcu (this is observed using 'perf sched timehist'). This patch makes the amount of dirty memory configurable between 64k where the synchronize_rcu is called often (small, low end systems that are memory sensitive) to 64M where synchronize_rcu is called rarely during a large FIB change (for high end systems with lots of memory). The default is 512kB which corresponds to the current setting of 128 pages with a 4kB page size. As an example, at 16MB the worst interval shows 4 calls to synchronize_rcu in a second blocking for up to 30 msec in a single instance, and a total of almost 100 msec across the 4 calls in the second. The trade off is allowing FIB entries to consume more memory in a given time window but but with much better fib insertion rates (~30% increase in prefixes/sec). With this patch and net.ipv4.fib_sync_mem set to 16MB, the same batch file runs in: $ time ./ip -batch ipv4/routes-1-hops real 0m9.692s user 0m2.491s sys 0m6.769s So the dead time is reduced to about 1/2 second or <5% of the real time. [1] 'ip' modified to not request ACK messages which improves route insertion times by about 20% Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ipv6: Add icmp_echo_ignore_anycast for ICMPv6Stephen Suryaputra2019-03-211-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In addition to icmp_echo_ignore_multicast, there is a need to also prevent responding to pings to anycast addresses for security. Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | ipv6: Add icmp_echo_ignore_multicast support for ICMPv6Stephen Suryaputra2019-03-191-0/+5
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IPv4 has icmp_echo_ignore_broadcast to prevent responding to broadcast pings. IPv6 needs a similar mechanism. v1->v2: - Remove NET_IPV6_ICMP_ECHO_IGNORE_MULTICAST. Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Documentation: networking: Update netdev-FAQ regarding patchesFlorian Fainelli2019-03-191-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | Provide an explanation of what is expected with respect to sending new versions of specific patches within a patch series, as well as what happens if an earlier patch series accidentally gets merged). Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | doc: fix link to MSG_ZEROCOPY patchsetTobias Klauser2019-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Use https and link to the patch directly. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | networking: fix snmp_counter.rst Doc. WarningsRandy Dunlap2019-03-181-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix documentation markup warnings in snmp_counter.rst: Documentation/networking/snmp_counter.rst:416: WARNING: Title underline too short. Documentation/networking/snmp_counter.rst:684: WARNING: Bullet list ends without a blank line; unexpected unindent. Documentation/networking/snmp_counter.rst:693: WARNING: Title underline too short. Documentation/networking/snmp_counter.rst:707: WARNING: Bullet list ends without a blank line; unexpected unindent. Documentation/networking/snmp_counter.rst:712: WARNING: Bullet list ends without a blank line; unexpected unindent. Documentation/networking/snmp_counter.rst:722: WARNING: Title underline too short. Documentation/networking/snmp_counter.rst:733: WARNING: Bullet list ends without a blank line; unexpected unindent. Documentation/networking/snmp_counter.rst:736: WARNING: Bullet list ends without a blank line; unexpected unindent. Documentation/networking/snmp_counter.rst:739: WARNING: Bullet list ends without a blank line; unexpected unindent. Fixes: 80cc49507ba48 ("net: Add part of TCP counts explanations in snmp_counters.rst") Fixes: 8e2ea53a83dfb ("add snmp counters document") Fixes: a6c7c7aac2de6 ("net: add document for several snmp counters") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: yupeng <yupeng0921@gmail.com>
* | | Merge tag 'docs-5.1' of git://git.lwn.net/linuxLinus Torvalds2019-03-095-185/+262
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "A fairly routine cycle for docs - lots of typo fixes, some new documents, and more translations. There's also some LICENSES adjustments from Thomas" * tag 'docs-5.1' of git://git.lwn.net/linux: (74 commits) docs: Bring some order to filesystem documentation Documentation/locking/lockdep: Drop last two chars of sample states doc: rcu: Suspicious RCU usage is a warning docs: driver-api: iio: fix errors in documentation Documentation/process/howto: Update for 4.x -> 5.x versioning docs: Explicitly state that the 'Fixes:' tag shouldn't split lines doc: security: Add kern-doc for lsm_hooks.h doc: sctp: Merge and clean up rst files Docs: Correct /proc/stat path scripts/spdxcheck.py: fix C++ comment style detection doc: fix typos in license-rules.rst Documentation: fix admin-guide/README.rst minimum gcc version requirement doc: process: complete removal of info about -git patches doc: translations: sync translations 'remove info about -git patches' perf-security: wrap paragraphs on 72 columns perf-security: elaborate on perf_events/Perf privileged users perf-security: document collected perf_events/Perf data categories perf-security: document perf_events/Perf resource control sysfs.txt: add note on available attribute macros docs: kernel-doc: typo "if ... if" -> "if ... is" ...
| * | doc: networking: integrate scaling document into doc treeOtto Sabart2019-01-212-46/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert scaling document into reStructuredText and add reference to scaling document into main table of contents in network documentation. There are no semantic changes. There are no references to "scaling.txt" file. Whole kernel tree was checked using: $ grep -r "scaling\.txt" Signed-off-by: Otto Sabart <ottosabart@seberm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | doc: networking: add offload documents into main index fileOtto Sabart2019-01-071-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch just adds references to offload documents into main table of contents in network documentation. Signed-off-by: Otto Sabart <ottosabart@seberm.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | doc: networking: shorten the main title in offloads documentsOtto Sabart2019-01-072-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The titles do not look very nice in the table of contents generated by Sphinx. I also think it is obvious that the documents are describing offloads in the Linux Networking Stack. Signed-off-by: Otto Sabart <ottosabart@seberm.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | doc: networking: convert offload files into RST and update referencesOtto Sabart2019-01-072-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch renames offload files. This is necessary for Sphinx. Also update reference to checksum-offloads.rst file. Whole kernel code was grepped for references using: $ grep -r "\(segmentation\|checksum\)-offloads.txt" . There should be no other references to {segmentation,checksum}-offloads.txt files. Signed-off-by: Otto Sabart <ottosabart@seberm.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | doc: networking: prepare offload documents for conversion into RSTOtto Sabart2019-01-072-95/+130
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add small number of markups which are sufficient for conversion into reStructuredText. Unfortunately there was necessary to restructure all sections in checksum-offloads.txt file and create paragraphs separated by newline. There also must not be a space at the beginning of paragpraph. There are no semantic changes. Signed-off-by: Otto Sabart <ottosabart@seberm.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller2019-03-042-2/+36
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Daniel Borkmann says: ==================== pull-request: bpf-next 2019-03-04 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Add AF_XDP support to libbpf. Rationale is to facilitate writing AF_XDP applications by offering higher-level APIs that hide many of the details of the AF_XDP uapi. Sample programs are converted over to this new interface as well, from Magnus. 2) Introduce a new cant_sleep() macro for annotation of functions that cannot sleep and use it in BPF_PROG_RUN() to assert that BPF programs run under preemption disabled context, from Peter. 3) Introduce per BPF prog stats in order to monitor the usage of BPF; this is controlled by kernel.bpf_stats_enabled sysctl knob where monitoring tools can make use of this to efficiently determine the average cost of programs, from Alexei. 4) Split up BPF selftest's test_progs similarly as we already did with test_verifier. This allows to further reduce merge conflicts in future and to get more structure into our quickly growing BPF selftest suite, from Stanislav. 5) Fix a bug in BTF's dedup algorithm which can cause an infinite loop in some circumstances; also various BPF doc fixes and improvements, from Andrii. 6) Various BPF sample cleanups and migration to libbpf in order to further isolate the old sample loader code (so we can get rid of it at some point), from Jakub. 7) Add a new BPF helper for BPF cgroup skb progs that allows to set ECN CE code point and a Host Bandwidth Manager (HBM) sample program for limiting the bandwidth used by v2 cgroups, from Lawrence. 8) Enable write access to skb->queue_mapping from tc BPF egress programs in order to let BPF pick TX queue, from Jesper. 9) Fix a bug in BPF spinlock handling for map-in-map which did not propagate spin_lock_off to the meta map, from Yonghong. 10) Fix a bug in the new per-CPU BPF prog counters to properly initialize stats for each CPU, from Eric. 11) Add various BPF helper prototypes to selftest's bpf_helpers.h, from Willem. 12) Fix various BPF samples bugs in XDP and tracing progs, from Toke, Daniel and Yonghong. 13) Silence preemption splat in test_bpf after BPF_PROG_RUN() enforces it now everywhere, from Anders. 14) Fix a signedness bug in libbpf's btf_dedup_ref_type() to get error handling working, from Dan. 15) Fix bpftool documentation and auto-completion with regards to stream_{verdict,parser} attach types, from Alban. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | docs/bpf: minor casing/punctuation fixesAndrii Nakryiko2019-03-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix few casing and punctuation glitches. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 21:25:37 +0100