- 06 Oct, 2015 3 commits
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David S. Miller authored
This reverts commit 04fbfce7.
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David S. Miller authored
This reverts commit 9886ce2b.
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Peter Nørlund authored
This fixes net/built-in.o: In function `fib_rebalance': fib_semantics.c:(.text+0x9df14): undefined reference to `__divdi3' and net/built-in.o: In function `fib_rebalance': net/ipv4/fib_semantics.c:572: undefined reference to `__aeabi_ldivmod' Fixes: 0e884c78 ("ipv4: L3 hash-based multipath") Signed-off-by:
Peter Nørlund <pch@ordbogen.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 05 Oct, 2015 37 commits
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Daniel Borkmann authored
Commit ea317b26 ("bpf: Add new bpf map type to store the pointer to struct perf_event") added perf_event.h to the main eBPF header, so it gets included for all users. perf_event.h is actually only needed from array map side, so lets sanitize this a bit. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Cc: Kaixu Xia <xiakaixu@huawei.com> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
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Nicolas Schichan authored
For ARMv7 with UDIV instruction support, generate an UDIV instruction followed by an MLS instruction. For other ARM variants, generate code calling a C wrapper similar to the jit_udiv() function used for BPF_ALU | BPF_DIV instructions. Some performance numbers reported by the test_bpf module (the duration per filter run is reported in nanoseconds, between "jitted:<x>" and "PASS": ARMv7 QEMU nojit: test_bpf: #3 DIV_MOD_KX jited:0 2196 PASS ARMv7 QEMU jit: test_bpf: #3 DIV_MOD_KX jited:1 104 PASS ARMv5 QEMU nojit: test_bpf: #3 DIV_MOD_KX jited:0 2176 PASS ARMv5 QEMU jit: test_bpf: #3 DIV_MOD_KX jited:1 1104 PASS ARMv5 kirkwood nojit: test_bpf: #3 DIV_MOD_KX jited:0 1103 PASS ARMv5 kirkwood jit: test_bpf: #3 DIV_MOD_KX jited:1 311 PASS Signed-off-by:
Nicolas Schichan <nschichan@freebox.fr> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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David S. Miller authored
Mark Craske says: ==================== Improve ASIX RX memory allocation error handling The ASIX RX handler algorithm is weak on error handling. There is a design flaw in the ASIX RX handler algorithm because the implementation for handling RX Ethernet frames for the DUB-E100 C1 can have Ethernet frames spanning multiple URBs. This means that payload data from more than 1 URB is sometimes needed to fill the socket buffer with a complete Ethernet frame. When the URB with the start of an Ethernet frame is received then an attempt is made to allocate a socket buffer. If the memory allocation fails then the algorithm sets the buffer pointer member to NULL and the function exits (no crash yet). Subsequently, the RX hander is called again to process the next URB which assumes there is a socket buffer available and the kernel crashes when there is no buffer. This patchset implements an improvement to the RX handling algorithm to avoid a crash when no memory is available for the socket buffer. The patchset will apply cleanly to the net-next master branch but the created kernel has not been tested. The driver was tested on ARM kernels v3.8 and v3.14 for a commercial product. ==================== Signed-off-by: -
Dean Jenkins authored
Avoid a loss of synchronisation of the Ethernet Data header 32-bit word due to a failure to get a netdev socket buffer. The ASIX RX handling algorithm returned 0 upon a failure to get an allocation of a netdev socket buffer. This causes the URB processing to stop which potentially causes a loss of synchronisation with the Ethernet Data header 32-bit word. Therefore, subsequent processing of URBs may be rejected due to a loss of synchronisation. This may cause additional good Ethernet frames to be discarded along with outputting of synchronisation error messages. Implement a solution which checks whether a netdev socket buffer has been allocated before trying to copy the Ethernet frame into the netdev socket buffer. But continue to process the URB so that synchronisation is maintained. Therefore, only a single Ethernet frame is discarded when no netdev socket buffer is available. Signed-off-by:
Dean Jenkins <Dean_Jenkins@mentor.com> Signed-off-by:
Mark Craske <Mark_Craske@mentor.com> Signed-off-by:
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Dean Jenkins authored
When RX Ethernet frames span multiple URB socket buffers, the data stream may suffer a discontinuity which will cause the current Ethernet frame in the netdev socket buffer to be incomplete. This frame needs to be discarded instead of appending unrelated data from the current URB socket buffer to the Ethernet frame in the netdev socket buffer. This avoids creating a corrupted Ethernet frame in the netdev socket buffer. A discontinuity can occur when the previous URB socket buffer held an incomplete Ethernet frame due to truncation or a URB socket buffer containing the end of the Ethernet frame was missing. Therefore, add a sanity test for when an Ethernet frame spans multiple URB socket buffers to check that the remaining bytes of the currently received Ethernet frame point to a good Data header 32-bit word of the next Ethernet frame. Upon error, reset the remaining bytes variable to zero and discard the current netdev socket buffer. Assume that the Data header is located at the start of the current socket buffer and attempt to process the next Ethernet frame from there. This avoids unnecessarily discarding a good URB socket buffer that contains a new Ethernet frame. Signed-off-by:
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Dean Jenkins authored
The code is checking that the Ethernet frame will fit into a netdev allocated socket buffer within the constraints of MTU size, Ethernet header length plus VLAN header length. The original code was checking rx->remaining each loop of the while loop that processes multiple Ethernet frames per URB and/or Ethernet frames that span across URBs. rx->remaining decreases per while loop so there is no point in potentially checking multiple times that the Ethernet frame (remaining part) will fit into the netdev socket buffer. The modification checks that the size of the Ethernet frame will fit the netdev socket buffer before allocating the netdev socket buffer. This avoids grabbing memory and then deciding that the Ethernet frame is too big and then freeing the memory. Signed-off-by:
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Dean Jenkins authored
Tidy-up the Data header 32-bit word synchronisation logic in asix_rx_fixup_internal() by removing redundant logic tests. The code is looking at the following cases of the Data header 32-bit word that is present before each Ethernet frame: a) all 32 bits of the Data header word are in the URB socket buffer b) first 16 bits of the Data header word are at the end of the URB socket buffer c) last 16 bits of the Data header word are at the start of the URB socket buffer eg. split_head = true Note that the lifetime of rx->split_head exists outside of the function call and is accessed per processing of each URB. Therefore, split_head being true acts on the next URB to be processed. To check for b) the offset will be 16 bits (2 bytes) from the end of the buffer then indicate split_head is true. To check for c) split_head must be true because the first 16 bits have been found. To check for a) else c) Note that the || logic of the old code included the state (skb->len - offset == sizeof(u16) && rx->split_head) which is not possible because the split_head cannot be true whilst checking for b). This is because the split_head indicates that the first 16 bits have been found and that is not possible whilst checking for the first 16 bits. Therefore simplify the logic. Signed-off-by:
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Dean Jenkins authored
The Data header synchronisation is easier to understand if the variables "remaining" and "size" are renamed. Therefore, the lifetime of the "remaining" variable exists outside of asix_rx_fixup_internal() and is used to indicate any remaining pending bytes of the Ethernet frame that need to be obtained from the next socket buffer. This allows an Ethernet frame to span across multiple socket buffers. "size" is now local to asix_rx_fixup_internal() and contains the size read from the Data header 32-bit word. Add "copy_length" to hold the number of the Ethernet frame bytes (maybe a part of a full frame) that are to be copied out of the socket buffer. Signed-off-by:
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Daniel Borkmann authored
The current ongoing effort to dump existing cBPF seccomp filters back to user space requires to hold the pre-transformed instructions like we do in case of socket filters from sk_attach_filter() side, so they can be reloaded in original form at a later point in time by utilities such as criu. To prepare for this, simply extend the bpf_prog_create_from_user() API to hold a flag that tells whether we should store the original or not. Also, fanout filters could make use of that in future for things like diag. While fanout filters already use bpf_prog_destroy(), move seccomp over to them as well to handle original programs when present. Signed-off-by:
Tycho Andersen <tycho.andersen@canonical.com> Acked-by:
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WANG Cong authored
This fixes: tried to remove device ip6gre0 from (null) ------------[ cut here ]------------ kernel BUG at net/core/dev.c:5219! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC CPU: 3 PID: 161 Comm: kworker/u8:2 Not tainted 4.3.0-rc2+ #1142 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Workqueue: netns cleanup_net task: ffff8800d784a9c0 ti: ffff8800d74a4000 task.ti: ffff8800d74a4000 RIP: 0010:[<ffffffff817f0797>] [<ffffffff817f0797>] __netdev_adjacent_dev_remove+0x40/0xec RSP: 0018:ffff8800d74a7a98 EFLAGS: 00010282 RAX: 000000000000002a RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88011adcf701 RSI: ffff88011adccbf8 RDI: ffff88011adccbf8 RBP: ffff8800d74a7ab8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff81d190ff R11: 00000000ffffffff R12: ffff8800d599e7c0 R13: 0000000000000000 R14: ffff8800d599e890 R15: ffffffff82385e00 FS: 0000000000000000(0000) GS:ffff88011ac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007ffd6f003000 CR3: 000000000220c000 CR4: 00000000000006e0 Stack: 0000000000000000 ffff8800d599e7c0 0000000000000b00 ffff8800d599e8a0 ffff8800d74a7ad8 ffffffff817f0861 0000000000000000 ffff8800d599e7c0 ffff8800d74a7af8 ffffffff817f088f 0000000000000000 ffff8800d599e7c0 Call Trace: [<ffffffff817f0861>] __netdev_adjacent_dev_unlink+0x1e/0x35 [<ffffffff817f088f>] __netdev_adjacent_dev_unlink_neighbour+0x17/0x41 [<ffffffff817f56e6>] netdev_upper_dev_unlink+0x6c/0x13d [<ffffffff81674a3d>] vrf_del_slave+0x26/0x7d [<ffffffff81674ac3>] vrf_device_event+0x2f/0x34 [<ffffffff81098c40>] notifier_call_chain+0x75/0x9c [<ffffffff81098fa2>] raw_notifier_call_chain+0x14/0x16 [<ffffffff817ee129>] call_netdevice_notifiers_info+0x52/0x59 [<ffffffff817f179d>] call_netdevice_notifiers+0x13/0x15 [<ffffffff817f6f18>] rollback_registered_many+0x14f/0x24f [<ffffffff817f70f2>] unregister_netdevice_many+0x19/0x64 [<ffffffff819a2455>] ip6gre_exit_net+0x163/0x177 [<ffffffff817eb019>] ops_exit_list+0x44/0x55 [<ffffffff817ebcb7>] cleanup_net+0x193/0x226 [<ffffffff81091e1c>] process_one_work+0x26c/0x4d8 [<ffffffff81091d20>] ? process_one_work+0x170/0x4d8 [<ffffffff81092296>] worker_thread+0x1df/0x2c2 [<ffffffff810920b7>] ? process_scheduled_works+0x2f/0x2f [<ffffffff810920b7>] ? process_scheduled_works+0x2f/0x2f [<ffffffff81097a20>] kthread+0xd4/0xdc [<ffffffff810bc523>] ? trace_hardirqs_on_caller+0x17d/0x199 [<ffffffff8109794c>] ? __kthread_parkme+0x83/0x83 [<ffffffff81a5240f>] ret_from_fork+0x3f/0x70 [<ffffffff8109794c>] ? __kthread_parkme+0x83/0x83 Fixes: 93a7e7e8 ("net: Remove the now unused vrf_ptr") Cc: David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Acked-by:
David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
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kbuild test robot authored
Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
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Jon Ringle authored
This ethernet driver supports the Micorchip enc424j600/626j600 Ethernet controller over a SPI bus interface. This driver makes use of the regmap API to optimize access to registers by caching registers where possible. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/39935b.pdfSigned-off-by:
Jon Ringle <jringle@gridpoint.com> Signed-off-by:
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Jon Ringle authored
This commit allows installing a custom reg_update_bits function for cases where the hardware provides a mechanism to set or clear register bits without a read/modify/write cycle. Such is the case with the Microchip ENCX24J600. Signed-off-by:
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Govindarajulu Varadarajan authored
The current code invokes hang reset in case of error interrupt. We should hang reset only in case of tx timeout. This because of the way hang reset is implemented in firmware. Hang reset takes more firmware resources than soft reset. Adaptor does not generate error interrupt in case of tx timeout. Hang reset only in case of tx timeout, in .ndo_tx_timeout. Do soft reset otherwise. Introduce deferred work, enic_tx_hang_reset, to do hang reset. Signed-off-by:
Govindarajulu Varadarajan <_govind@gmx.com> Signed-off-by:
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Govindarajulu Varadarajan authored
Some of the enic adaptors are know to generate spurious interrupts. When error interrupt is generated, driver just resets the device. This patch resets the device only when an error is occurred. Signed-off-by:
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David S. Miller authored
Hariprasad Shenai says: ==================== cxgb4: Trivial fixes for cxgb4 Fixes the following issues Don't read non existent T4/T5/T6 adapter registers for ethtool dump. For T4, dont read mailbox control registers. Adds new devlog faility and report correct link speed for unsupported ones. This patch series has been created against net-next tree and includes patches on cxgb4 driver. We have included all the maintainers of respective drivers. Kindly review the change and let us know in case of any review comments. ==================== Acked-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
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Hariprasad Shenai authored
When we get garbage from the firmware with weird Port Speeds, etc. we should emit a warning regarding unsupported speeds rather than use the bogus default of "10Mbps" which isn't even an option in the firmware Port Information message Signed-off-by:
Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by:
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Hariprasad Shenai authored
The firmware team added a new Device Log Facility FW_DEVLOG_FACILITY_CF, but the driver has been decoding Device Log messages with that Facility as "(NULL)", fixing it. Signed-off-by:
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Hariprasad Shenai authored
T4 doesn't have the Shadow copy of the register which we can read without side effect. So don't read mbox control register for T4 adapter Signed-off-by:
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Hariprasad Shenai authored
Update T4/T5/T6 adapter register ranges so that it doesn't read non existent registers when dumped using ethtool Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/net-nextDavid S. Miller authored
Eric W. Biederman says: ==================== net: Pass net through ip fragmention This is the next installment of my work to pass struct net through the output path so the code does not need to guess how to figure out which network namespace it is in, and ultimately routes can have output devices in another network namespace. This round focuses on passing net through ip fragmentation which we seem to call from about everywhere. That is the main ip output paths, the bridge netfilter code, and openvswitch. This has to happend at once accross the tree as function pointers are involved. First some prep work is done, then ipv4 and ipv6 are converted and then temporary helper functions are removed. ==================== Acked-by:
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David S. Miller authored
Sowmini Varadhan says: ==================== RDS: RDS-TCP perf enhancements A 3-part patchset that (a) improves current RDS-TCP perf by 2X-3X and (b) refactors earlier robustness code for better observability/scaling. Patch 1 is an enhancment of earlier robustness fixes that had used separate sockets for client and server endpoints to resolve race conditions. It is possible to have an equivalent solution that does not use 2 sockets. The benefit of a single socket solution is that it results in more predictable and observable behavior for the underlying TCP pipe of an RDS connection Patches 2 and 3 are simple, straightforward perf bug fixes that align the RDS TCP socket with other parts of the kernel stack. v2: fix kbuild-test-robot warnings, comments from Sergei Shtylov and Santosh Shilimkar. ==================== Acked-by:Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by:
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Sowmini Varadhan authored
For the same reasons as commit 2f533844 ("tcp: allow splice() to build full TSO packets") and commit 35f9c09f ("tcp: tcp_sendpages() should call tcp_push() once"), rds_tcp_xmit may have multiple pages to send, so use the MSG_MORE and MSG_SENDPAGE_NOTLAST as hints to tcp_sendpage() Signed-off-by:
Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by:
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Sowmini Varadhan authored
Using the value of RDS_TCP_DEFAULT_BUFSIZE (128K) clobbers efficient use of TSO because it inflates the size_goal that is computed in tcp_sendmsg/tcp_sendpage and skews packet latency, and the default values for these parameters actually results in significantly better performance. In request-response tests using rds-stress with a packet size of 100K with 16 threads (test parameters -q 100000 -a 256 -t16 -d16) between a single pair of IP addresses achieves a throughput of 6-8 Gbps. Without this patch, throughput maxes at 2-3 Gbps under equivalent conditions on these platforms. Signed-off-by:
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Sowmini Varadhan authored
Commit f711a6ae ("net/rds: RDS-TCP: Always create a new rds_sock for an incoming connection.") modified rds-tcp so that an incoming SYN would ignore an existing "client" TCP connection which had the local port set to the transient port. The motivation for ignoring the existing "client" connection in f711a6ae was to avoid race conditions and an endless duel of reconnect attempts triggered by a restart/abort of one of the nodes in the TCP connection. However, having separate sockets for active and passive sides is avoidable, and the simpler model of a single TCP socket for both send and receives of all RDS connections associated with that tcp socket makes for easier observability. We avoid the race conditions from f711a6ae by attempting reconnects in rds_conn_shutdown if, and only if, the (new) c_outgoing bit is set for RDS_TRANS_TCP. The c_outgoing bit is initialized in __rds_conn_create(). A side-effect of re-using the client rds_connection for an incoming SYN is the potential of encountering duelling SYNs, i.e., we have an outgoing RDS_CONN_CONNECTING socket when we get the incoming SYN. The logic to arbitrate this criss-crossing SYN exchange in rds_tcp_accept_one() has been modified to emulate the BGP state machine: the smaller IP address should back off from the connection attempt. Signed-off-by:
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David S. Miller authored
Tom Lendacky says: ==================== amd-xgbe: AMD XGBE driver updates 2015-09-30 The following patches are included in this driver update series: - Remove unneeded semi-colon - Follow the DT/ACPI precedence used by the device_ APIs - Add ethtool support for getting and setting the msglevel - Add ethtool support error and debug messages - Simplify the hardware FIFO assignment calculations - Add receive buffer unavailable statistic - Use the device workqueue instead of the system workqueue - Remove the use of a link state bit This patch series is based on net-next. ==================== Signed-off-by: -
Lendacky, Thomas authored
The XGBE_LINK bit is used just to determine whether to call the netif_carrier_on/off functions. Rather than define and use this bit, just call the functions. The netif_carrier_ok function can be used in place of checking the XGBE_LINK bit in the future. Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by:
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Lendacky, Thomas authored
The driver creates, flushes and destroys a device workqueue but queues work to the system workqueue. Switch from using the system workqueue to the device workqueue. Signed-off-by:
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Lendacky, Thomas authored
Add a statistic that tracks how many times an interrupt is generated for a receive buffer not being available to the hardware which prevents the hardware from being able to DMA the received data. Signed-off-by:
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Lendacky, Thomas authored
The calculation of the Tx and Rx fifo sizes can be calculated rather than hardcoded in a switch statement. Additionally, the per-queue fifo sizes can be calculated rather than hardcoded using if/else if statements that can possibly underutilize the available fifo area. Change the code to calculate the fifo sizes and the per-queue fifo sizes to simplify the code and make best use of the available fifo. Signed-off-by:
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Lendacky, Thomas authored
Add error and dynamic debug messages to various ethtool functions in the driver while also removing the DBGPR debug print calls. Also, change the message level for some error messages from alert to err. Signed-off-by:
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Lendacky, Thomas authored
Provide the ethtool functions to support getting and setting the msglevel for the driver. Signed-off-by:
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Lendacky, Thomas authored
Device tree presence takes precedence over ACPI in the device_* APIs. The amd-xgbe driver should follow the same precedence. Update the check on whether to use DT / ACPI to follow this. Signed-off-by:
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Lendacky, Thomas authored
Remove an unneeded semicolon at the end of a switch statement block. Reported-by:
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Eric Dumazet authored
I accidentally cleared fastopenq.max_qlen in reqsk_queue_alloc() while max_qlen can be set before listen() is called, using TCP_FASTOPEN socket option for example. Fixes: 0536fcc0 ("tcp: prepare fastopen code for upcoming listener changes") Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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David S. Miller authored
Arnd Bergmann says: ==================== net: assorted y2038 changes This is a set of changes for network drivers and core code to get rid of the use of time_t and derived data structures. I have a longer set of patches that enables me to build kernels with the time_t definition removed completely as a help to find y2038 overflow issues. This is the subset for networking that contains all code that has a reasonable way of fixing at the moment and that is either commonly used (in one of the defconfigs) or that blocks building a whole subsystem. Most of the patches in this series should be noncontroversial, but the last two that I marked [RFC] are a bit tricky and need input from people that are more familiar with the code than I am. All 12 patches are independent of one another and can be applied in any order, so feel free to pick all that look good. Patches that are not included here are: - disabling less common device drivers that I don't have a fix for yet, this includes drivers/net/ethernet/brocade/bna/bfa_ioc.c drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c drivers/net/ethernet/tile/tilegx.c drivers/net/hamradio/baycom_ser_fdx.c drivers/net/wireless/ath/ath10k/core.h drivers/net/wireless/ath/ath9k/ drivers/net/wireless/ath/ath9k/ drivers/net/wireless/atmel.c drivers/net/wireless/prism54/isl_38xx.c drivers/net/wireless/rt2x00/rt2x00debug.c drivers/net/wireless/rtlwifi/ drivers/net/wireless/ti/wlcore/ drivers/staging/ozwpan/ net/atm/mpoa_caches.c net/atm/mpoa_proc.c net/dccp/probe.c net/ipv4/tcp_probe.c net/netfilter/nfnetlink_queue_core.c net/netfilter/nfnetlink_queue_core.c net/netfilter/xt_time.c net/openvswitch/flow.c net/sctp/probe.c net/sunrpc/auth_gss/ net/sunrpc/svcauth_unix.c net/vmw_vsock/af_vsock.c We'll get there eventually, or we an add a dependency to ensure they are not built on 32-bit kernels that need to survive beyond 2038. Most of these should be really easy to fix. - recvmmsg/sendmmsg system calls: patches have been sent out as part of the syscall series, need a little more work and review - SIOCGSTAMP/SIOCGSTAMPNS/ ioctl calls: tricky, need to discuss with some folks at kernel summit - SO_RCVTIMEO/SO_SNDTIMEO/SO_TIMESTAMP/SO_TIMESTAMPNS socket opt: similar and related to the ioctl - mmapped packet socket: need to create v4 of the API, nontrivial - pktgen: sends 32-bit timestamps over network, need to find out if using unsigned stamps is good enough - af_rxpc: similar to pktgen, uses 32-bit times for deadlines - ppp ioctl: patch is being worked on, nontrivial but doable ==================== Signed-off-by: -
Arnd Bergmann authored
We want to avoid using time_t in the kernel because of the y2038 overflow problem. The use in sctp is not for storing seconds at all, but instead uses microseconds and is passed as 32-bit on all machines. This patch changes the type to u32, which better fits the use. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: linux-sctp@vger.kernel.org Acked-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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