- 08 Jan, 2022 27 commits
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Marc Kleine-Budde authored
A RX overflow usually happens during high system load. Printing overflow messages to the kernel log, which on embedded systems often is outputted on the serial console, even increases the system load. To decrease the system load in these situations, denote the messages to debug level and wrap them with net_ratelimit(). Link: https://lore.kernel.org/all/20220105154300.1258636-7-mkl@pengutronix.deSigned-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
With patch | dd8088d5 PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter the usual pm_runtime_get_sync() and pm_runtime_put_noidle() in-case-of-error dance is no longer needed. Convert the mcp251xfd driver to use this function. Link: https://lore.kernel.org/all/20220105154300.1258636-6-mkl@pengutronix.deSigned-off-by:
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Marc Kleine-Budde authored
This patch exchanges the order of open_candev() and pm_runtime_get_sync(), so that open_candev() is called first. A usual reason why open_candev() fails is missing CAN bit rate configuration. It makes no sense to resume the device from PM sleep first just to put it to sleep if the bit rate is not configured. Link: https://lore.kernel.org/all/20220105154300.1258636-5-mkl@pengutronix.deSigned-off-by:
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Marc Kleine-Budde authored
This patch adds the missing newline to printed strings. Fixes: 55e5b97f ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN") Link: https://lore.kernel.org/all/20220105154300.1258636-4-mkl@pengutronix.deSigned-off-by:
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Marc Kleine-Budde authored
This patch fixes a typo in the error message in mcp251xfd_tef_obj_read(), if trying to read too many objects. Link: https://lore.kernel.org/all/20220105154300.1258636-3-mkl@pengutronix.de Fixes: 55e5b97f ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN") Signed-off-by:
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Marc Kleine-Budde authored
This patch removes double blank lines from the driver. Link: https://lore.kernel.org/all/20220105154300.1258636-2-mkl@pengutronix.deSigned-off-by:
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Tom Rix authored
Clang static analysis reports this problem janz-ican3.c:1311:2: warning: Undefined or garbage value returned to caller return dlc; ^~~~~~~~~~ dlc is only set with this conditional if (!(cf->can_id & CAN_RTR_FLAG)) dlc = cf->len; But is always returned. So initialize dlc to 0. Fixes: cc4b08c3 ("can: do not increase tx_bytes statistics for RTR frames") Link: https://lore.kernel.org/all/20220108143319.3986923-1-trix@redhat.comSigned-off-by:Tom Rix <trix@redhat.com> Acked-by:
Vincent Mailhol <mailhol.vincent@wanadoo.fr> Signed-off-by:
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Jakub Kicinski authored
Arthur Kiyanovski says: ==================== ENA: capabilities field and cosmetic changes Add a new capabilities bitmask field to get indication of capabilities supported by the device. Use the capabilities field to query the device for ENI stats support. Other patches are cosmetic changes like fixing readme mistakes, removing unused variables etc... ==================== Link: https://lore.kernel.org/r/20220107202346.3522-1-akiyano@amazon.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Arthur Kiyanovski authored
Create an inline function for resetting the driver to reduce code duplication. Signed-off-by:
Nati Koler <nkoler@amazon.com> Signed-off-by:
Arthur Kiyanovski <akiyano@amazon.com> Signed-off-by:
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Arthur Kiyanovski authored
Changed bad_csum to csum_bad to align with csum_unchecked & csum_good Signed-off-by:
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Arthur Kiyanovski authored
Add qid and req_id to error prints when ENA_REGS_RESET_INV_TX_REQ_ID reset occurs. Switch from %hu to %u, since u16 should be printed with %u, as explained in [1]. [1] - https://www.kernel.org/doc/html/latest/core-api/printk-formats.htmlSigned-off-by:
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Arthur Kiyanovski authored
This struct was used to pass data from callee function to its caller. Its usage can be avoided. Removing it results in less code without any damage to code readability. Also it allows to consolidate ring size calculation into a single function (ena_calc_io_queue_size()). Signed-off-by:
Shay Agroskin <shayagr@amazon.com> Signed-off-by:
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Arthur Kiyanovski authored
The print that indicates that device reset has finished is currently called from ena_restore_device(). Move it to ena_fw_reset_device() as it is the more natural location for it. Signed-off-by:
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Arthur Kiyanovski authored
The ena_com_indirect_table_fill_entry() function only returns -EINVAL or 0, no need to check for -EOPNOTSUPP. Signed-off-by:
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Arthur Kiyanovski authored
LLQ entry length is 128 bytes. Therefore the maximum header in the entry is calculated by: tx_max_header_size = LLQ_ENTRY_SIZE - DESCRIPTORS_NUM_BEFORE_HEADER * 16 = 128 - 2 * 16 = 96 This patch updates the documentation so that it states the correct max header length. Signed-off-by:
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Arthur Kiyanovski authored
Use the capabilities field to query the device for ENI stats support. This replaces the previous method that tried to get the ENI stats during ena_probe() and used the success or failure as an indication for support by the device. Remove eni_stats_supported field from struct ena_adapter. This field was used for the previous method of queriying for ENI stats support. Change the severity level of the print in case of ena_com_get_eni_stats() failure from info to error. With the previous method of querying form ENI stats support, failure to get ENI stats was normal for devices that don't support it. With the use of the capabilities field such a failure is unexpected, as it is called only if the device reported that it supports ENI stats. Signed-off-by:
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Arthur Kiyanovski authored
This bitmask field indicates what capabilities are supported by the device. The capabilities field differs from the 'supported_features' field which indicates what sub-commands for the set/get feature commands are supported. The sub-commands are specified in the 'feature_id' field of the 'ena_admin_set_feat_cmd' struct in the following way: struct ena_admin_set_feat_cmd cmd; cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE; cmd.feat_common.feature_ The 'capabilities' field, on the other hand, specifies different capabilities of the device. For example, whether the device supports querying of ENI stats. Also add an enumerator which contains all the capabilities. The first added capability macro is for ENI stats feature. Capabilities are queried along with the other device attributes (in ena_com_get_dev_attr_feat()) during device initialization and are stored in the ena_com_dev struct. They can be later queried using the ena_com_get_cap() helper function. Signed-off-by: -
Arthur Kiyanovski authored
ena_calc_io_queue_size() always returns 0, therefore make it a void function and update the calling function to stop checking the return value. Signed-off-by:
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Eric Dumazet authored
It appears that my changes in packet_do_bind() were slightly wrong. syzbot found that calling bind() twice would trigger a false positive. Remove proto_curr/dev_curr variables and rewrite things to be less confusing (like not having to use netdev_tracker_alloc(), and instead use the standard dev_hold_track()) Fixes: f1d9268e ("net: add net device refcount tracker to struct packet_type") Signed-off-by:
Eric Dumazet <edumazet@google.com> Reported-by:
syzbot <syzkaller@googlegroups.com> Link: https://lore.kernel.org/r/20220107183953.3886647-1-eric.dumazet@gmail.comSigned-off-by:
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Jakub Kicinski authored
Mat Martineau says: ==================== mptcp: Refactoring for one selftest and csum validation Patch 1 changes the MPTCP join self tests to depend more on events rather than delays, so the script runs faster and has more consistent results. Patches 2 and 3 get rid of some duplicate code in MPTCP's checksum validation by modifying and leveraging an existing helper function. ==================== Link: https://lore.kernel.org/r/20220107192524.445137-1-mathew.j.martineau@linux.intel.comSigned-off-by:
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Geliang Tang authored
This patch reused __mptcp_make_csum() in validate_data_csum() instead of open-coding. Signed-off-by:
Geliang Tang <geliang.tang@suse.com> Signed-off-by:
Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by:
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Geliang Tang authored
This patch changed the type of the last parameter of __mptcp_make_csum() from __sum16 to __wsum. And export this function in protocol.h. Signed-off-by:
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Paolo Abeni authored
MPTCP join self-tests are a bit fragile as they reply on delays instead of events to catch-up with the expected sockets states. Replace the delay with state checking where possible and reduce the number of sleeps in the most complex scenarios. This will both reduce the tests run-time and will improve stability. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
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Vladimir Oltean authored
Add support for flushing the MAC table on a given port in the ocelot switch library, and use this functionality in the felix DSA driver. This operation is needed when a port leaves a bridge to become standalone, and when the learning is disabled, and when the STP state changes to a state where no FDB entry should be present. Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20220107144229.244584-1-vladimir.oltean@nxp.comSigned-off-by:
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Vladimir Oltean authored
Assuming the test setup described here: https://patchwork.kernel.org/project/netdevbpf/cover/20210205130240.4072854-1-vladimir.oltean@nxp.com/ (swp1 and swp2 are in bond0, and bond0 is in a bridge with swp0) it can be seen that when swp1 goes down (on either board A or B), then traffic that should go through that port isn't forwarded anywhere. A dump of the PGID table shows the following: PGID_DST[0] = ports 0 PGID_DST[1] = ports 1 PGID_DST[2] = ports 2 PGID_DST[3] = ports 3 PGID_DST[4] = ports 4 PGID_DST[5] = ports 5 PGID_DST[6] = no ports PGID_AGGR[0] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[1] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[2] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[3] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[4] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[5] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[6] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[7] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[8] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[9] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[10] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[11] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[12] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[13] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[14] = ports 0, 1, 2, 3, 4, 5 PGID_AGGR[15] = ports 0, 1, 2, 3, 4, 5 PGID_SRC[0] = ports 1, 2 PGID_SRC[1] = ports 0 PGID_SRC[2] = ports 0 PGID_SRC[3] = no ports PGID_SRC[4] = no ports PGID_SRC[5] = no ports PGID_SRC[6] = ports 0, 1, 2, 3, 4, 5 Whereas a "good" PGID configuration for that setup should have looked like this: PGID_DST[0] = ports 0 PGID_DST[1] = ports 1, 2 PGID_DST[2] = ports 1, 2 PGID_DST[3] = ports 3 PGID_DST[4] = ports 4 PGID_DST[5] = ports 5 PGID_DST[6] = no ports PGID_AGGR[0] = ports 0, 2, 3, 4, 5 PGID_AGGR[1] = ports 0, 2, 3, 4, 5 PGID_AGGR[2] = ports 0, 2, 3, 4, 5 PGID_AGGR[3] = ports 0, 2, 3, 4, 5 PGID_AGGR[4] = ports 0, 2, 3, 4, 5 PGID_AGGR[5] = ports 0, 2, 3, 4, 5 PGID_AGGR[6] = ports 0, 2, 3, 4, 5 PGID_AGGR[7] = ports 0, 2, 3, 4, 5 PGID_AGGR[8] = ports 0, 2, 3, 4, 5 PGID_AGGR[9] = ports 0, 2, 3, 4, 5 PGID_AGGR[10] = ports 0, 2, 3, 4, 5 PGID_AGGR[11] = ports 0, 2, 3, 4, 5 PGID_AGGR[12] = ports 0, 2, 3, 4, 5 PGID_AGGR[13] = ports 0, 2, 3, 4, 5 PGID_AGGR[14] = ports 0, 2, 3, 4, 5 PGID_AGGR[15] = ports 0, 2, 3, 4, 5 PGID_SRC[0] = ports 1, 2 PGID_SRC[1] = ports 0 PGID_SRC[2] = ports 0 PGID_SRC[3] = no ports PGID_SRC[4] = no ports PGID_SRC[5] = no ports PGID_SRC[6] = ports 0, 1, 2, 3, 4, 5 In other words, in the "bad" configuration, the attempt is to remove the inactive swp1 from the destination ports via PGID_DST. But when a MAC table entry is learned, it is learned towards PGID_DST 1, because that is the logical port id of the LAG itself (it is equal to the lowest numbered member port). So when swp1 becomes inactive, if we set PGID_DST[1] to contain just swp1 and not swp2, the packet will not have any chance to reach the destination via swp2. The "correct" way to remove swp1 as a destination is via PGID_AGGR (remove swp1 from the aggregation port groups for all aggregation codes). This means that PGID_DST[1] and PGID_DST[2] must still contain both swp1 and swp2. This makes the MAC table still treat packets destined towards the single-port LAG as "multicast", and the inactive ports are removed via the aggregation code tables. The change presented here is a design one: the ocelot_get_bond_mask() function used to take an "only_active_ports" argument. We don't need that. The only call site that specifies only_active_ports=true, ocelot_set_aggr_pgids(), must retrieve the entire bonding mask, because it must program that into PGID_DST. Additionally, it must also clear the inactive ports from the bond mask here, which it can't do if bond_mask just contains the active ports: ac = ocelot_read_rix(ocelot, ANA_PGID_PGID, i); ac &= ~bond_mask; <---- here /* Don't do division by zero if there was no active * port. Just make all aggregation codes zero. */ if (num_active_ports) ac |= BIT(aggr_idx[i % num_active_ports]); ocelot_write_rix(ocelot, ac, ANA_PGID_PGID, i); So it becomes the responsibility of ocelot_set_aggr_pgids() to take ocelot_port->lag_tx_active into consideration when populating the aggr_idx array. Fixes: 23ca3b72 ("net: mscc: ocelot: rebalance LAGs on link up/down events") Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queueJakub Kicinski authored
Tony Nguyen says: ==================== 40GbE Intel Wired LAN Driver Updates 2022-01-07 This series contains updates to i40e and iavf drivers. Karen limits per VF MAC filters so that one VF does not consume all filters for i40e. Jedrzej reduces busy wait time for admin queue calls for i40e. Mateusz updates firmware versions to reflect new supported NVM images and renames an error to remove non-inclusive language for i40e. Yang Li fixes a set but not used warning for i40e. Jason Wang removes an unneeded variable for iavf. * '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue: iavf: remove an unneeded variable i40e: remove variables set but not used i40e: Remove non-inclusive language i40e: Update FW API version i40e: Minimize amount of busy-waiting during AQ send i40e: Add ensurance of MacVlan resources for every trusted VF ==================== Link: https://lore.kernel.org/r/20220107175704.438387-1-anthony.l.nguyen@intel.comSigned-off-by:
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Gal Pressman authored
The cited Fixes commit introduced a memory leak when running kTLS traffic (with/without hardware offloads). I'm running nginx on the server side and wrk on the client side and get the following: unreferenced object 0xffff8881935e9b80 (size 224): comm "softirq", pid 0, jiffies 4294903611 (age 43.204s) hex dump (first 32 bytes): 80 9b d0 36 81 88 ff ff 00 00 00 00 00 00 00 00 ...6............ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000efe2a999>] build_skb+0x1f/0x170 [<00000000ef521785>] mlx5e_skb_from_cqe_mpwrq_linear+0x2bc/0x610 [mlx5_core] [<00000000945d0ffe>] mlx5e_handle_rx_cqe_mpwrq+0x264/0x9e0 [mlx5_core] [<00000000cb675b06>] mlx5e_poll_rx_cq+0x3ad/0x17a0 [mlx5_core] [<0000000018aac6a9>] mlx5e_napi_poll+0x28c/0x1b60 [mlx5_core] [<000000001f3369d1>] __napi_poll+0x9f/0x560 [<00000000cfa11f72>] net_rx_action+0x357/0xa60 [<000000008653b8d7>] __do_softirq+0x282/0x94e [<00000000644923c6>] __irq_exit_rcu+0x11f/0x170 [<00000000d4085f8f>] irq_exit_rcu+0xa/0x20 [<00000000d412fef4>] common_interrupt+0x7d/0xa0 [<00000000bfb0cebc>] asm_common_interrupt+0x1e/0x40 [<00000000d80d0890>] default_idle+0x53/0x70 [<00000000f2b9780e>] default_idle_call+0x8c/0xd0 [<00000000c7659e15>] do_idle+0x394/0x450 I'm not familiar with these areas of the code, but I've added this sk_defer_free_flush() to tls_sw_recvmsg() based on a hunch and it resolved the issue. Fixes: f35f8219 ("tcp: defer skb freeing after socket lock is released") Signed-off-by:Gal Pressman <gal@nvidia.com> Reviewed-by:
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- 07 Jan, 2022 13 commits
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Jason Wang authored
The variable `ret_code' used for returning is never changed in function `iavf_shutdown_adminq'. So that it can be removed and just return its initial value 0 at the end of `iavf_shutdown_adminq' function. Signed-off-by:
Jason Wang <wangborong@cdjrlc.com> Signed-off-by:
Tony Nguyen <anthony.l.nguyen@intel.com>
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Yang Li authored
The code that uses variables pe_cntx_size and pe_filt_size has been removed, so they should be removed as well. Eliminate the following clang warnings: drivers/net/ethernet/intel/i40e/i40e_common.c:4139:20: warning: variable 'pe_filt_size' set but not used. drivers/net/ethernet/intel/i40e/i40e_common.c:4139:6: warning: variable 'pe_cntx_size' set but not used. Reported-by:
Abaci Robot <abaci@linux.alibaba.com> Signed-off-by:
Yang Li <yang.lee@linux.alibaba.com> Tested-by:
Gurucharan G <gurucharanx.g@intel.com> Signed-off-by:
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Mateusz Palczewski authored
Remove non-inclusive language from the driver. Signed-off-by:
Aleksandr Loktionov <aleksandr.loktionov@intel.com> Signed-off-by:
Mateusz Palczewski <mateusz.palczewski@intel.com> Signed-off-by:
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Mateusz Palczewski authored
Update FW API versions to the newest supported NVM images. Signed-off-by:
Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com> Signed-off-by:
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Jedrzej Jagielski authored
The i40e_asq_send_command will now use a non blocking usleep_range if possible (non-atomic context), instead of busy-waiting udelay. The usleep_range function uses hrtimers to provide better performance and removes the negative impact of busy-waiting in time-critical environments. 1. Rename i40e_asq_send_command to i40e_asq_send_command_atomic and add 5th parameter to inform if called from an atomic context. Call inside usleep_range (if non-atomic) or udelay (if atomic). 2. Change i40e_asq_send_command to invoke i40e_asq_send_command_atomic(..., false). 3. Change two functions: - i40e_aq_set_vsi_uc_promisc_on_vlan - i40e_aq_set_vsi_mc_promisc_on_vlan to explicitly use i40e_asq_send_command_atomic(..., true) instead of i40e_asq_send_command, as they use spinlocks and do some work in an atomic context. All other calls to i40e_asq_send_command remain unchanged. Signed-off-by:Dawid Lukwinski <dawid.lukwinski@intel.com> Signed-off-by:
Jedrzej Jagielski <jedrzej.jagielski@intel.com> Tested-by:
Tony Brelinski <tony.brelinski@intel.com> Signed-off-by:
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Karen Sornek authored
Trusted VF can use up every resource available, leaving nothing to other trusted VFs. Introduce define, which calculates MacVlan resources available based on maximum available MacVlan resources, bare minimum for each VF and number of currently allocated VFs. Signed-off-by:
Przemyslaw Patynowski <przemyslawx.patynowski@intel.com> Signed-off-by:
Karen Sornek <karen.sornek@intel.com> Tested-by:
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Kevin Bracey authored
Documentation incorrectly stated that CS1 is equivalent to LE for diffserv8. But when LE was added to the table, CS1 was pushed into tin 1, leaving only LE in tin 0. Also "TOS1" no longer exists, as that is the same codepoint as LE. Make other tweaks properly distinguishing codepoints from classes and putting current Diffserve codepoints ahead of legacy ones. Signed-off-by:
Kevin Bracey <kevin@bracey.fi> Acked-by:
Toke Høiland-Jørgensen <toke@toke.dk> Link: https://lore.kernel.org/r/20220106215637.3132391-1-kevin@bracey.fiSigned-off-by:
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David S. Miller authored
Mat Martineau says: ==================== mptcp: New features and cleanup These patches have been tested in the MPTCP tree for a longer than usual time (thanks to holiday schedules), and are ready for the net-next branch. Changes include feature updates, small fixes, refactoring, and some selftest changes. Patch 1 fixes an OUTQ ioctl issue with TCP fallback sockets. Patches 2, 3, and 6 add support of the MPTCP fastclose option (quick shutdown of the full MPTCP connection, similar to TCP RST in regular TCP), and a related self test. Patch 4 cleans up some accept and poll code that is no longer needed after the fastclose changes. Patch 5 add userspace disconnect using AF_UNSPEC, which is used when testing fastclose and makes the MPTCP socket's handling of AF_UNSPEC in connect() more TCP-like. Patches 7-11 refactor subflow creation to make better use of multiple local endpoints and to better handle individual connection failures when creating multiple subflows. Includes self test updates. Patch 12 cleans up the way subflows are added to the MPTCP connection list, eliminating the need for calls throughout the MPTCP code that had to check the intermediate "join list" for entries to shift over to the main "connection list". Patch 13 refactors the MPTCP release_cb flags to use separate storage for values only accessed with the socket lock held (no atomic ops needed), and for values that need atomic operations. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Paolo Abeni authored
Currently the msk->flags bitmask carries both state for the mptcp_release_cb() - mostly touched under the mptcp data lock - and others state info touched even outside such lock scope. As a consequence, msk->flags is always manipulated with atomic operations. This change splits such bitmask in two separate fields, so that we use plain bit operations when touching the cb-related info. The MPTCP_PUSH_PENDING bit needs additional care, as it is the only CB related field currently accessed either under the mptcp data lock or the mptcp socket lock. Let's add another mask just for such bit's sake. Signed-off-by:
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Paolo Abeni authored
We can simplify the join list handling leveraging the mptcp_release_cb(): if we can acquire the msk socket lock at mptcp_finish_join time, move the new subflow directly into the conn_list, otherwise place it on join_list and let the release_cb process such list. Since pending MPJ connection are now always processed in a timely way, we can avoid flushing the join list every time we have to process all the current subflows. Additionally we can now use the mptcp data lock to protect the join_list, removing the additional spin lock. Finally, the MPJ handshake is now always finalized under the msk socket lock, we can drop the additional synchronization between mptcp_finish_join() and mptcp_close(). Signed-off-by:
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Paolo Abeni authored
Verify that, when multiple endpoints are available, subflows creation proceed even when the first additional subflow creation fails - due to packet drop on the relevant link Co-developed-by:
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Paolo Abeni authored
If the MPTCP configuration allows for multiple subflows creation, and the first additional subflows never reach the fully established status - e.g. due to packets drop or reset - the in kernel path manager do not move to the next subflow. This patch introduces a new PM helper to cope with MPJ subflow creation failure and delay and hook it where appropriate. Such helper triggers additional subflow creation, as needed and updates the PM subflow counter, if the current one is closing. Additionally start all the needed additional subflows as soon as the MPTCP socket is fully established, so we don't have to cope with slow MPJ handshake blocking the next subflow creation. Signed-off-by:
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Paolo Abeni authored
Include into the path manager status a bitmap tracking the list of local endpoints still available - not yet used - for the relevant mptcp socket. Keep such map updated at endpoint creation/deletion time, so that we can easily skip already used endpoint at local address selection time. The endpoint used by the initial subflow is lazyly accounted at subflow creation time: the usage bitmap is be up2date before endpoint selection and we avoid such unneeded task in some relevant scenarios - e.g. busy servers accepting incoming subflows but not creating any additional ones nor annuncing additional addresses. Overall this allows for fair local endpoints usage in case of subflow failure. As a side effect, this patch also enforces that each endpoint is used at most once for each mptcp connection. Signed-off-by:
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