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2020-09-24net: tcp: drop unused function argument from mptcp_incoming_optionsFlorian Westphal1-2/+1
Since commit cfde141ea3faa30e ("mptcp: move option parsing into mptcp_incoming_options()"), the 3rd function argument is no longer used. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: retransmit ADD_ADDR when timeoutGeliang Tang3-17/+96
This patch implemented the retransmition of ADD_ADDR when no ADD_ADDR echo is received. It added a timer with the announced address. When timeout occurs, ADD_ADDR will be retransmitted. Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Suggested-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add struct mptcp_pm_add_entryGeliang Tang1-7/+12
Add a new struct mptcp_pm_add_entry to describe add_addr's entry. Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add mptcp_destroy_common helperGeliang Tang3-6/+10
This patch added a new helper named mptcp_destroy_common containing the shared code between mptcp_destroy() and mptcp_sock_destruct(). Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add RM_ADDR related mibsGeliang Tang3-0/+9
This patch added two new mibs for RM_ADDR, named MPTCP_MIB_RMADDR and MPTCP_MIB_RMSUBFLOW, when the RM_ADDR suboption is received, increase the first mib counter, when the local subflow is removed, increase the second mib counter. Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: implement mptcp_pm_remove_subflowGeliang Tang3-3/+42
This patch implemented the local subflow removing function, mptcp_pm_remove_subflow, it simply called mptcp_pm_nl_rm_subflow_received under the PM spin lock. We use mptcp_pm_remove_subflow to remove a local subflow, so change it's argument from remote_id to local_id. We check subflow->local_id in mptcp_pm_nl_rm_subflow_received to remove a subflow. Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: remove addr and subflow in PM netlinkGeliang Tang5-11/+130
This patch implements the remove announced addr and subflow logic in PM netlink. When the PM netlink removes an address, we traverse all the existing msk sockets to find the relevant sockets. We add a new list named anno_list in mptcp_pm_data, to record all the announced addrs. In the traversing, we check if it has been recorded. If it has been, we trigger the RM_ADDR signal. We also check if this address is in conn_list. If it is, we remove the subflow which using this local address. Since we call mptcp_pm_free_anno_list in mptcp_destroy, we need to move __mptcp_init_sock before the mptcp_is_enabled check in mptcp_init_sock. Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add accept_subflow re-checkGeliang Tang1-4/+6
The re-check of pm->accept_subflow with pm->lock held was missing, this patch fixed it. Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add ADD_ADDR related mibsGeliang Tang3-1/+10
This patch added two mibs for ADD_ADDR, MPTCP_MIB_ADDADDR for receiving of the ADD_ADDR suboption with echo-flag=0, and MPTCP_MIB_ECHOADD for receiving the ADD_ADDR suboption with echo-flag=1. Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: send out ADD_ADDR with echo flagGeliang Tang4-23/+32
When the ADD_ADDR suboption has been received, we need to send out the same ADD_ADDR suboption with echo-flag=1, and no HMAC. Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add the incoming RM_ADDR supportGeliang Tang5-4/+66
This patch added the RM_ADDR option parsing logic: We parsed the incoming options to find if the rm_addr option is received, and called mptcp_pm_rm_addr_received to schedule PM work to a new status, named MPTCP_PM_RM_ADDR_RECEIVED. PM work got this status, and called mptcp_pm_nl_rm_addr_received to handle it. In mptcp_pm_nl_rm_addr_received, we closed the subflow matching the rm_id, and updated PM counter. Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: add the outgoing RM_ADDR supportGeliang Tang3-0/+63
This patch added a new signal named rm_addr_signal in PM. On outgoing path, we called mptcp_pm_should_rm_signal to check if rm_addr_signal has been set. If it has been, we sent out the RM_ADDR option. Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-24mptcp: rename addr_signal and the related functionsGeliang Tang3-18/+18
This patch renamed addr_signal and the related functions with the explicit word "add". Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net> Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2-5/+21
Two minor conflicts: 1) net/ipv4/route.c, adding a new local variable while moving another local variable and removing it's initial assignment. 2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes. One pretty prints the port mode differently, whilst another changes the driver to try and obtain the port mode from the port node rather than the switch node. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-17mptcp: fix integer overflow in mptcp_subflow_discard_data()Paolo Abeni1-1/+1
Christoph reported an infinite loop in the subflow receive path under stress condition. If there are multiple subflows, each of them using a large send buffer, the delta between the sequence number used by MPTCP-level retransmission can and the current msk->ack_seq can be greater than MAX_INT. In the above scenario, when calling mptcp_subflow_discard_data(), such delta will be truncated to int, and could result in a negative number: no bytes will be dropped, and subflow_check_data_avail() will try again to process the same packet, looping forever. This change addresses the issue by expanding the 'limit' size to 64 bits, so that overflows are not possible anymore. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/87 Fixes: 6719331c2f73 ("mptcp: trigger msk processing even for OoO data") Reported-and-tested-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-17mptcp: Fix unsigned 'max_seq' compared with zero in mptcp_data_queue_ofoYe Bin1-2/+3
Fixes coccicheck warnig: net/mptcp/protocol.c:164:11-18: WARNING: Unsigned expression compared with zero: max_seq > 0 Fixes: ab174ad8ef76 ("mptcp: move ooo skbs into msk out of order queue") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Ye Bin <yebin10@huawei.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: call tcp_cleanup_rbuf on subflowsPaolo Abeni2-0/+8
That is needed to let the subflows announce promptly when new space is available in the receive buffer. tcp_cleanup_rbuf() is currently a static function, drop the scope modifier and add a declaration in the TCP header. Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: allow picking different xmit subflowsPaolo Abeni2-18/+99
Update the scheduler to less trivial heuristic: cache the last used subflow, and try to send on it a reasonably long burst of data. When the burst or the subflow send space is exhausted, pick the subflow with the lower ratio between write space and send buffer - that is, the subflow with the greater relative amount of free space. v1 -> v2: - fix 32 bit build breakage due to 64bits div - fix checkpath issues (uint64_t -> u64) Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: allow creating non-backup subflowsPaolo Abeni1-1/+2
Currently the 'backup' attribute of local endpoint is ignored. Let's use it for the MP_JOIN handshake Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: move address attribute into mptcp_addr_infoPaolo Abeni3-24/+25
So that can be accessed easily from the subflow creation helper. No functional change intended. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: add OoO related mibsPaolo Abeni4-1/+34
Add a bunch of MPTCP mibs related to MPTCP OoO data processing. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: cleanup mptcp_subflow_discard_data()Paolo Abeni2-45/+14
There is no need to use the tcp_read_sock(), we can simply drop the skb. Additionally try to look at the next buffer for in order data. This both simplifies the code and avoid unneeded indirect calls. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: move ooo skbs into msk out of order queue.Paolo Abeni3-56/+211
Add an RB-tree to cope with OoO (at MPTCP level) data. __mptcp_move_skb() insert into the RB tree "future" data, eventually coalescing skb as allowed by the MPTCP DSN. To simplify sequence accounting, move the DSN inside the cb. After successfully enqueuing in sequence data, check if we can use any data from the RB tree. Additionally move the data_fin check after spooling data from the OoO tree, otherwise we could miss shutdown events. The RB tree code is copied as verbatim as possible from tcp_data_queue_ofo(), with a few simplifications due to the fact that MPTCP doesn't need to cope with sacks. All bugs here are added by me. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: introduce and use mptcp_try_coalesce()Paolo Abeni1-12/+19
Factor-out existing code, will be re-used by the next patch. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: basic sndbuf autotuningPaolo Abeni1-4/+13
Let the msk sendbuf track the size of the larger subflow's send window, so that we ensure mptcp_sendmsg() does not exceed MPTCP-level send window. The update is performed just before try to send any data. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: trigger msk processing even for OoO dataPaolo Abeni3-42/+78
This is a prerequisite to allow receiving data from multiple subflows without re-injection. Instead of dropping the OoO - "future" data in subflow_check_data_avail(), call into __mptcp_move_skbs() and let the msk drop that. To avoid code duplication factor out the mptcp_subflow_discard_data() helper. Note that __mptcp_move_skbs() can now find multiple subflows with data avail (comprising to-be-discarded data), so must update the byte counter incrementally. v1 -> v2: - fix checkpatch issues (unsigned -> unsigned int) Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: set data_ready status bit in subflow_check_data_avail()Paolo Abeni1-11/+8
This simplify mptcp_subflow_data_available() and will made follow-up patches simpler. Additionally remove the unneeded checks on subflow copied_seq: we always whole skbs out of subflows. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14mptcp: rethink 'is writable' conditionalPaolo Abeni2-27/+50
Currently, when checking for the 'msk is writable' condition, we look at the individual subflows write space. That works well while we send data via a single subflow, but will not as soon as we will enable concurrent xmit on multiple subflows. With this change msk becomes writable when the following conditions hold: - the socket has some free write space - there is at least a subflow with write free space Additionally we need to set the NOSPACE bit on all subflows before blocking. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-10mptcp: fix kmalloc flag in mptcp_pm_nl_get_local_idGeliang Tang1-1/+1
mptcp_pm_nl_get_local_id may be called in interrupt context, so we need to use GFP_ATOMIC flag to allocate memory to avoid sleeping in atomic context. [ 280.209809] BUG: sleeping function called from invalid context at mm/slab.h:498 [ 280.209812] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1680, name: kworker/1:3 [ 280.209814] INFO: lockdep is turned off. [ 280.209816] CPU: 1 PID: 1680 Comm: kworker/1:3 Tainted: G W 5.9.0-rc3-mptcp+ #146 [ 280.209818] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 280.209820] Workqueue: events mptcp_worker [ 280.209822] Call Trace: [ 280.209824] <IRQ> [ 280.209826] dump_stack+0x77/0xa0 [ 280.209829] ___might_sleep.cold+0xa6/0xb6 [ 280.209832] kmem_cache_alloc_trace+0x1d1/0x290 [ 280.209835] mptcp_pm_nl_get_local_id+0x23c/0x410 [ 280.209840] subflow_init_req+0x1e9/0x2ea [ 280.209843] ? inet_reqsk_alloc+0x1c/0x120 [ 280.209845] ? kmem_cache_alloc+0x264/0x290 [ 280.209849] tcp_conn_request+0x303/0xae0 [ 280.209854] ? printk+0x53/0x6a [ 280.209857] ? tcp_rcv_state_process+0x28f/0x1374 [ 280.209859] tcp_rcv_state_process+0x28f/0x1374 [ 280.209864] ? tcp_v4_do_rcv+0xb3/0x1f0 [ 280.209866] tcp_v4_do_rcv+0xb3/0x1f0 [ 280.209869] tcp_v4_rcv+0xed6/0xfa0 [ 280.209873] ip_protocol_deliver_rcu+0x28/0x270 [ 280.209875] ip_local_deliver_finish+0x89/0x120 [ 280.209877] ip_local_deliver+0x180/0x220 [ 280.209881] ip_rcv+0x166/0x210 [ 280.209885] __netif_receive_skb_one_core+0x82/0x90 [ 280.209888] process_backlog+0xd6/0x230 [ 280.209891] net_rx_action+0x13a/0x410 [ 280.209895] __do_softirq+0xcf/0x468 [ 280.209899] asm_call_on_stack+0x12/0x20 [ 280.209901] </IRQ> [ 280.209903] ? ip_finish_output2+0x240/0x9a0 [ 280.209906] do_softirq_own_stack+0x4d/0x60 [ 280.209908] do_softirq.part.0+0x2b/0x60 [ 280.209911] __local_bh_enable_ip+0x9a/0xa0 [ 280.209913] ip_finish_output2+0x264/0x9a0 [ 280.209916] ? rcu_read_lock_held+0x4d/0x60 [ 280.209920] ? ip_output+0x7a/0x250 [ 280.209922] ip_output+0x7a/0x250 [ 280.209925] ? __ip_finish_output+0x330/0x330 [ 280.209928] __ip_queue_xmit+0x1dc/0x5a0 [ 280.209931] __tcp_transmit_skb+0xa0f/0xc70 [ 280.209937] tcp_connect+0xb03/0xff0 [ 280.209939] ? lockdep_hardirqs_on_prepare+0xe7/0x190 [ 280.209942] ? ktime_get_with_offset+0x125/0x150 [ 280.209944] ? trace_hardirqs_on+0x1c/0xe0 [ 280.209948] tcp_v4_connect+0x449/0x550 [ 280.209953] __inet_stream_connect+0xbb/0x320 [ 280.209955] ? mark_held_locks+0x49/0x70 [ 280.209958] ? lockdep_hardirqs_on_prepare+0xe7/0x190 [ 280.209960] ? __local_bh_enable_ip+0x6b/0xa0 [ 280.209963] inet_stream_connect+0x32/0x50 [ 280.209966] __mptcp_subflow_connect+0x1fd/0x242 [ 280.209972] mptcp_pm_create_subflow_or_signal_addr+0x2db/0x600 [ 280.209975] mptcp_worker+0x543/0x7a0 [ 280.209980] process_one_work+0x26d/0x5b0 [ 280.209984] ? process_one_work+0x5b0/0x5b0 [ 280.209987] worker_thread+0x48/0x3d0 [ 280.209990] ? process_one_work+0x5b0/0x5b0 [ 280.209993] kthread+0x117/0x150 [ 280.209996] ? kthread_park+0x80/0x80 [ 280.209998] ret_from_fork+0x22/0x30 Fixes: 01cacb00b35cb ("mptcp: add netlink-based PM") Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-10mptcp: fix subflow's remote_id issuesGeliang Tang2-3/+6
This patch set the init remote_id to zero, otherwise it will be a random number. Then it added the missing subflow's remote_id setting code both in __mptcp_subflow_connect and in subflow_ulp_clone. Fixes: 01cacb00b35cb ("mptcp: add netlink-based PM") Fixes: ec3edaa7ca6ce ("mptcp: Add handling of outgoing MP_JOIN requests") Fixes: f296234c98a8f ("mptcp: Add handling of incoming MP_JOIN requests") Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-10mptcp: fix subflow's local_id issuesGeliang Tang1-1/+14
In mptcp_pm_nl_get_local_id, skc_local is the same as msk_local, so it always return 0. Thus every subflow's local_id is 0. It's incorrect. This patch fixed this issue. Also, we need to ignore the zero address here, like 0.0.0.0 in IPv4. When we use the zero address as a local address, it means that we can use any one of the local addresses. The zero address is not a new address, we don't need to add it to PM, so this patch added a new function address_zero to check whether an address is the zero address, if it is, we ignore this address. Fixes: 01cacb00b35cb ("mptcp: add netlink-based PM") Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-4/+2
We got slightly different patches removing a double word in a comment in net/ipv4/raw.c - picked the version from net. Simple conflict in drivers/net/ethernet/ibm/ibmvnic.c. Use cached values instead of VNIC login response buffer (following what commit 507ebe6444a4 ("ibmvnic: Fix use-after-free of VNIC login response buffer") did). Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-09-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds1-2/+1
Pull networking fixes from David Miller: 1) Use netif_rx_ni() when necessary in batman-adv stack, from Jussi Kivilinna. 2) Fix loss of RTT samples in rxrpc, from David Howells. 3) Memory leak in hns_nic_dev_probe(), from Dignhao Liu. 4) ravb module cannot be unloaded, fix from Yuusuke Ashizuka. 5) We disable BH for too lokng in sctp_get_port_local(), add a cond_resched() here as well, from Xin Long. 6) Fix memory leak in st95hf_in_send_cmd, from Dinghao Liu. 7) Out of bound access in bpf_raw_tp_link_fill_link_info(), from Yonghong Song. 8) Missing of_node_put() in mt7530 DSA driver, from Sumera Priyadarsini. 9) Fix crash in bnxt_fw_reset_task(), from Michael Chan. 10) Fix geneve tunnel checksumming bug in hns3, from Yi Li. 11) Memory leak in rxkad_verify_response, from Dinghao Liu. 12) In tipc, don't use smp_processor_id() in preemptible context. From Tuong Lien. 13) Fix signedness issue in mlx4 memory allocation, from Shung-Hsi Yu. 14) Missing clk_disable_prepare() in gemini driver, from Dan Carpenter. 15) Fix ABI mismatch between driver and firmware in nfp, from Louis Peens. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (110 commits) net/smc: fix sock refcounting in case of termination net/smc: reset sndbuf_desc if freed net/smc: set rx_off for SMCR explicitly net/smc: fix toleration of fake add_link messages tg3: Fix soft lockup when tg3_reset_task() fails. doc: net: dsa: Fix typo in config code sample net: dp83867: Fix WoL SecureOn password nfp: flower: fix ABI mismatch between driver and firmware tipc: fix shutdown() of connectionless socket ipv6: Fix sysctl max for fib_multipath_hash_policy drivers/net/wan/hdlc: Change the default of hard_header_len to 0 net: gemini: Fix another missing clk_disable_unprepare() in probe net: bcmgenet: fix mask check in bcmgenet_validate_flow() amd-xgbe: Add support for new port mode net: usb: dm9601: Add USB ID of Keenetic Plus DSL vhost: fix typo in error message net: ethernet: mlx4: Fix memory allocation in mlx4_buddy_init() pktgen: fix error message with wrong function name net: ethernet: ti: am65-cpsw: fix rmii 100Mbit link mode cxgb4: fix thermal zone device registration ...
2020-08-31mptcp: Remove unused macro MPTCP_SAME_STATEYueHaibing1-2/+0
There is no caller in tree any more. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-26mptcp: free acked data before waiting for more memoryFlorian Westphal1-2/+1
After subflow lock is dropped, more wmem might have been made available. This fixes a deadlock in mptcp_connect.sh 'mmap' mode: wmem is exhausted. But as the mptcp socket holds on to already-acked data (for retransmit) no wakeup will occur. Using 'goto restart' calls mptcp_clean_una(sk) which will free pages that have been acked completely in the mean time. Fixes: fb529e62d3f3 ("mptcp: break and restart in case mptcp sndbuf is full") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva1-2/+1
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-18netlink: consistently use NLA_POLICY_EXACT_LEN()Johannes Berg1-2/+2
Change places that open-code NLA_POLICY_EXACT_LEN() to use the macro instead, giving us flexibility in how we handle the details of the macro. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-16mptcp: sendmsg: reset iter on error reduxFlorian Westphal1-3/+5
This fix wasn't correct: When this function is invoked from the retransmission worker, the iterator contains garbage and resetting it causes a crash. As the work queue should not be performance critical also zero the msghdr struct. Fixes: 35759383133f64d "(mptcp: sendmsg: reset iter on error)" Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-14mptcp: sendmsg: reset iter on errorFlorian Westphal1-2/+6
Once we've copied data from the iterator we need to revert in case we end up not sending any data. This bug doesn't trigger with normal 'poll' based tests, because we only feed a small chunk of data to kernel after poll indicated POLLOUT. With blocking IO and large writes this triggers. Receiver ends up with less data than it should get. Fixes: 72511aab95c94d ("mptcp: avoid blocking in tcp_sendpages") Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-07mptcp: fix warn at shutdown time for unaccepted msk socketsPaolo Abeni1-3/+3
With commit b93df08ccda3 ("mptcp: explicitly track the fully established status"), the status of unaccepted mptcp closed in mptcp_sock_destruct() changes from TCP_SYN_RECV to TCP_ESTABLISHED. As a result mptcp_sock_destruct() does not perform the proper cleanup and inet_sock_destruct() will later emit a warn. Address the issue updating the condition tested in mptcp_sock_destruct(). Also update the related comment. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/66 Reported-and-tested-by: Christoph Paasch <cpaasch@apple.com> Fixes: b93df08ccda3 ("mptcp: explicitly track the fully established status") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextLinus Torvalds15-619/+1803
Pull networking updates from David Miller: 1) Support 6Ghz band in ath11k driver, from Rajkumar Manoharan. 2) Support UDP segmentation in code TSO code, from Eric Dumazet. 3) Allow flashing different flash images in cxgb4 driver, from Vishal Kulkarni. 4) Add drop frames counter and flow status to tc flower offloading, from Po Liu. 5) Support n-tuple filters in cxgb4, from Vishal Kulkarni. 6) Various new indirect call avoidance, from Eric Dumazet and Brian Vazquez. 7) Fix BPF verifier failures on 32-bit pointer arithmetic, from Yonghong Song. 8) Support querying and setting hardware address of a port function via devlink, use this in mlx5, from Parav Pandit. 9) Support hw ipsec offload on bonding slaves, from Jarod Wilson. 10) Switch qca8k driver over to phylink, from Jonathan McDowell. 11) In bpftool, show list of processes holding BPF FD references to maps, programs, links, and btf objects. From Andrii Nakryiko. 12) Several conversions over to generic power management, from Vaibhav Gupta. 13) Add support for SO_KEEPALIVE et al. to bpf_setsockopt(), from Dmitry Yakunin. 14) Various https url conversions, from Alexander A. Klimov. 15) Timestamping and PHC support for mscc PHY driver, from Antoine Tenart. 16) Support bpf iterating over tcp and udp sockets, from Yonghong Song. 17) Support 5GBASE-T i40e NICs, from Aleksandr Loktionov. 18) Add kTLS RX HW offload support to mlx5e, from Tariq Toukan. 19) Fix the ->ndo_start_xmit() return type to be netdev_tx_t in several drivers. From Luc Van Oostenryck. 20) XDP support for xen-netfront, from Denis Kirjanov. 21) Support receive buffer autotuning in MPTCP, from Florian Westphal. 22) Support EF100 chip in sfc driver, from Edward Cree. 23) Add XDP support to mvpp2 driver, from Matteo Croce. 24) Support MPTCP in sock_diag, from Paolo Abeni. 25) Commonize UDP tunnel offloading code by creating udp_tunnel_nic infrastructure, from Jakub Kicinski. 26) Several pci_ --> dma_ API conversions, from Christophe JAILLET. 27) Add FLOW_ACTION_POLICE support to mlxsw, from Ido Schimmel. 28) Add SK_LOOKUP bpf program type, from Jakub Sitnicki. 29) Refactor a lot of networking socket option handling code in order to avoid set_fs() calls, from Christoph Hellwig. 30) Add rfc4884 support to icmp code, from Willem de Bruijn. 31) Support TBF offload in dpaa2-eth driver, from Ioana Ciornei. 32) Support XDP_REDIRECT in qede driver, from Alexander Lobakin. 33) Support PCI relaxed ordering in mlx5 driver, from Aya Levin. 34) Support TCP syncookies in MPTCP, from Flowian Westphal. 35) Fix several tricky cases of PMTU handling wrt. briding, from Stefano Brivio. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2056 commits) net: thunderx: initialize VF's mailbox mutex before first usage usb: hso: remove bogus check for EINPROGRESS usb: hso: no complaint about kmalloc failure hso: fix bailout in error case of probe ip_tunnel_core: Fix build for archs without _HAVE_ARCH_IPV6_CSUM selftests/net: relax cpu affinity requirement in msg_zerocopy test mptcp: be careful on subflow creation selftests: rtnetlink: make kci_test_encap() return sub-test result selftests: rtnetlink: correct the final return value for the test net: dsa: sja1105: use detected device id instead of DT one on mismatch tipc: set ub->ifindex for local ipv6 address ipv6: add ipv6_dev_find() net: openvswitch: silence suspicious RCU usage warning Revert "vxlan: fix tos value before xmit" ptp: only allow phase values lower than 1 period farsync: switch from 'pci_' to 'dma_' API wan: wanxl: switch from 'pci_' to 'dma_' API hv_netvsc: do not use VF device if link is down dpaa2-eth: Fix passing zero to 'PTR_ERR' warning net: macb: Properly handle phylink on at91sam9x ...
2020-08-05mptcp: be careful on subflow creationPaolo Abeni1-0/+6
Nicolas reported the following oops: [ 1521.392541] BUG: kernel NULL pointer dereference, address: 00000000000000c0 [ 1521.394189] #PF: supervisor read access in kernel mode [ 1521.395376] #PF: error_code(0x0000) - not-present page [ 1521.396607] PGD 0 P4D 0 [ 1521.397156] Oops: 0000 [#1] SMP PTI [ 1521.398020] CPU: 0 PID: 22986 Comm: kworker/0:2 Not tainted 5.8.0-rc4+ #109 [ 1521.399618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 1521.401728] Workqueue: events mptcp_worker [ 1521.402651] RIP: 0010:mptcp_subflow_create_socket+0xf1/0x1c0 [ 1521.403954] Code: 24 08 89 44 24 04 48 8b 7a 18 e8 2a 48 d4 ff 8b 44 24 04 85 c0 75 7a 48 8b 8b 78 02 00 00 48 8b 54 24 08 48 8d bb 80 00 00 00 <48> 8b 89 c0 00 00 00 48 89 8a c0 00 00 00 48 8b 8b 78 02 00 00 8b [ 1521.408201] RSP: 0000:ffffabc4002d3c60 EFLAGS: 00010246 [ 1521.409433] RAX: 0000000000000000 RBX: ffffa0b9ad8c9a00 RCX: 0000000000000000 [ 1521.411096] RDX: ffffa0b9ae78a300 RSI: 00000000fffffe01 RDI: ffffa0b9ad8c9a80 [ 1521.412734] RBP: ffffa0b9adff2e80 R08: ffffa0b9af02d640 R09: ffffa0b9ad923a00 [ 1521.414333] R10: ffffabc4007139f8 R11: fefefefefefefeff R12: ffffabc4002d3cb0 [ 1521.415918] R13: ffffa0b9ad91fa58 R14: ffffa0b9ad8c9f9c R15: 0000000000000000 [ 1521.417592] FS: 0000000000000000(0000) GS:ffffa0b9af000000(0000) knlGS:0000000000000000 [ 1521.419490] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1521.420839] CR2: 00000000000000c0 CR3: 000000002951e006 CR4: 0000000000160ef0 [ 1521.422511] Call Trace: [ 1521.423103] __mptcp_subflow_connect+0x94/0x1f0 [ 1521.425376] mptcp_pm_create_subflow_or_signal_addr+0x200/0x2a0 [ 1521.426736] mptcp_worker+0x31b/0x390 [ 1521.431324] process_one_work+0x1fc/0x3f0 [ 1521.432268] worker_thread+0x2d/0x3b0 [ 1521.434197] kthread+0x117/0x130 [ 1521.435783] ret_from_fork+0x22/0x30 on some unconventional configuration. The MPTCP protocol is trying to create a subflow for an unaccepted server socket. That is allowed by the RFC, even if subflow creation will likely fail. Unaccepted sockets have still a NULL sk_socket field, avoid the issue by failing earlier. Reported-and-tested-by: Nicolas Rybowski <nicolas.rybowski@tessares.net> Fixes: 7d14b0d2b9b3 ("mptcp: set correct vfs info for subflows") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-03mptcp: fix bogus sendmsg() return code under pressurePaolo Abeni1-2/+1
In case of memory pressure, mptcp_sendmsg() may call sk_stream_wait_memory() after succesfully xmitting some bytes. If the latter fails we currently return to the user-space the error code, ignoring the succeful xmit. Address the issue always checking for the xmitted bytes before mptcp_sendmsg() completes. Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests") Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-03mptcp: use mptcp_for_each_subflow in mptcp_stream_acceptGeliang Tang1-1/+1
Use mptcp_for_each_subflow in mptcp_stream_accept instead of open-coding. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-03Merge branch 'linus' of ↵Linus Torvalds1-12/+3
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Add support for allocating transforms on a specific NUMA Node - Introduce the flag CRYPTO_ALG_ALLOCATES_MEMORY for storage users Algorithms: - Drop PMULL based ghash on arm64 - Fixes for building with clang on x86 - Add sha256 helper that does the digest in one go - Add SP800-56A rev 3 validation checks to dh Drivers: - Permit users to specify NUMA node in hisilicon/zip - Add support for i.MX6 in imx-rngc - Add sa2ul crypto driver - Add BA431 hwrng driver - Add Ingenic JZ4780 and X1000 hwrng driver - Spread IRQ affinity in inside-secure and marvell/cesa" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (157 commits) crypto: sa2ul - Fix inconsistent IS_ERR and PTR_ERR hwrng: core - remove redundant initialization of variable ret crypto: x86/curve25519 - Remove unused carry variables crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000 dt-bindings: RNG: Add Ingenic RNG bindings. crypto: caam/qi2 - add module alias crypto: caam - add more RNG hw error codes crypto: caam/jr - remove incorrect reference to caam_jr_register() crypto: caam - silence .setkey in case of bad key length crypto: caam/qi2 - create ahash shared descriptors only once crypto: caam/qi2 - fix error reporting for caam_hash_alloc crypto: caam - remove deadcode on 32-bit platforms crypto: ccp - use generic power management crypto: xts - Replace memcpy() invocation with simple assignment crypto: marvell/cesa - irq balance crypto: inside-secure - irq balance crypto: ecc - SP800-56A rev 3 local public key validation crypto: dh - SP800-56A rev 3 local public key validation crypto: dh - check validity of Z before export lib/mpi: Add mpi_sub_ui() ...
2020-08-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-1/+1
Resolved kernel/bpf/btf.c using instructions from merge commit 69138b34a7248d2396ab85c8652e20c0c39beaba Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-01mptcp: fix syncookie build error on UPFlorian Westphal1-3/+1
kernel test robot says: net/mptcp/syncookies.c: In function 'mptcp_join_cookie_init': include/linux/kernel.h:47:38: warning: division by zero [-Wdiv-by-zero] #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) I forgot that spinock_t size is 0 on UP, so ARRAY_SIZE cannot be used. Fixes: 9466a1ccebbe54 ("mptcp: enable JOIN requests even if cookies are in use") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-31mptcp: enable JOIN requests even if cookies are in useFlorian Westphal5-0/+168
JOIN requests do not work in syncookie mode -- for HMAC validation, the peers nonce and the mptcp token (to obtain the desired connection socket the join is for) are required, but this information is only present in the initial syn. So either we need to drop all JOIN requests once a listening socket enters syncookie mode, or we need to store enough state to reconstruct the request socket later. This adds a state table (1024 entries) to store the data present in the MP_JOIN syn request and the random nonce used for the cookie syn/ack. When a MP_JOIN ACK passed cookie validation, the table is consulted to rebuild the request socket from it. An alternate approach would be to "cancel" syn-cookie mode and force MP_JOIN to always use a syn queue entry. However, doing so brings the backlog over the configured queue limit. v2: use req->syncookie, not (removed) want_cookie arg Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-31mptcp: subflow: add mptcp_subflow_init_cookie_req helperFlorian Westphal3-1/+76
Will be used to initialize the mptcp request socket when a MP_CAPABLE request was handled in syncookie mode, i.e. when a TCP ACK containing a MP_CAPABLE option is a valid syncookie value. Normally (non-cookie case), MPTCP will generate a unique 32 bit connection ID and stores it in the MPTCP token storage to be able to retrieve the mptcp socket for subflow joining. In syncookie case, we do not want to store any state, so just generate the unique ID and use it in the reply. This means there is a small window where another connection could generate the same token. When Cookie ACK comes back, we check that the token has not been registered in the mean time. If it was, the connection needs to fall back to TCP. Changes in v2: - use req->syncookie instead of passing 'want_cookie' arg to ->init_req() (Eric Dumazet) Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-31mptcp: rename and export mptcp_subflow_request_sock_opsFlorian Westphal1-5/+6
syncookie code path needs to create an mptcp request sock. Prepare for this and add mptcp prefix plus needed export of ops struct. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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