- 17 May, 2018 22 commits
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Antoine Tenart authored
This patch adds the 1000Base-X PHY mode support in the Marvell PPv2 driver. 1000Base-X is quite close the SGMII and uses nearly the same code path. Signed-off-by:
Antoine Tenart <antoine.tenart@bootlin.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Antoine Tenart authored
This patch allow the CP110 comphy to configure some lanes in the 2.5G SGMII mode. This mode is quite close to SGMII and uses nearly the same code path. Signed-off-by:
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Antoine Tenart authored
This patch adds one more generic PHY mode to the phy_mode enum, to allow configuring generic PHYs to the 2.5G SGMII mode by using the set_mode callback. Signed-off-by:
Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by:
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Antoine Tenart authored
Convert the PPv2 driver to implement phylink helpers, and use phylink in DT mode. The other mode supported is ACPI, which will need further work in order to be entirely compatible with phylink. The MAC and GoP configuration functions were completely moved to fit into the phylink helpers. When a PHY is always present between the MAC and the physical port, phylink only is used, but when this is not the case (the MAC directly is connected to the physical port) the link IRQ is used to detect changes in the link state and call phylink_mac_change. The ACPI mode do not uses phylink as of now, and the changes shouldn't impact its use. Signed-off-by:
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Antoine Tenart authored
Cosmetic patch to align the ethtool functions to ops definitions. This patch does not change in any way the driver's behaviour. Signed-off-by:
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David S. Miller authored
Merge tag 'wireless-drivers-next-for-davem-2018-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next Kalle Valo says: ==================== wireless-drivers-next patches for 4.18 The first pull request for 4.18. As usual new features and bug fixes but nothing really special. I also merged wireless-drivers due to an iwlwifi patch dependency. Major changes: iwlwifi * implement Traffic Condition Monitor and use it for scan, BT coex and to detect when the AP doesn't support UAPSD properly * some more work for the 22000 family of devices; * introduce AMSDU rate control offload qtnfmac * DFS offload support rsi * roaming enhancements * increase max supported aggregation subframes * don't advertise 5 GHz support if the device doesn't support it brcmfmac * add support for BCM4366E chipset * add support for bcm43364 wireless chipset ath10k * enable temperature reads for QCA6174 and QCA9377 * add firmware memory dump support for QCA9984 * continue adding WCN3990 support via SNOC bus ==================== Signed-off-by:
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YueHaibing authored
As documented in Documentation/timers/timers-howto.txt, replace msleep(1) with usleep_range(). Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Signed-off-by:
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Tonghao Zhang authored
Introduce an new common helper to avoid redundancy. Signed-off-by:
Tonghao Zhang <xiangxia.m.yue@gmail.com> Signed-off-by:
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David S. Miller authored
Yuchung Cheng says: ==================== tcp: default RACK loss recovery This patch set implements the features correspond to the draft-ietf-tcpm-rack-03 version of the RACK draft. https://datatracker.ietf.org/meeting/101/materials/slides-101-tcpm-update-on-tcp-rack-00 1. SACK: implement equivalent DUPACK threshold heuristic in RACK to replace existing RFC6675 recovery (tcp_mark_head_lost). 2. Non-SACK: simplify RFC6582 NewReno implementation 3. RTO: apply RACK's time-based approach to avoid spuriouly marking very recently sent packets lost. 4. with (1)(2)(3), make RACK the exclusive fast recovery mechanism to mark losses based on time on S/ACK. Tail loss probe and F-RTO remain enabled by default as complementary mechanisms to send probes in CA_Open and CA_Loss states. The probes would solicit S/ACKs to trigger RACK time-based loss detection. All Google web and internal servers have been running RACK-only mode (4) for a while now. a/b experiments indicate RACK/TLP on average reduces recovery latency by 10% compared to RFC6675. RFC6675 is default-off now but can be enabled by disabling RACK (sysctl net.ipv4.tcp_recovery=0) for unseen issues. ==================== Signed-off-by:
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Yuchung Cheng authored
An RTO event indicates the head has not been acked for a long time after its last (re)transmission. But the other packets are not necessarily lost if they have been only sent recently (for example due to application limit). This patch would prohibit marking packets sent within an RTT to be lost on RTO event, using similar logic in TCP RACK detection. Normally the head (SND.UNA) would be marked lost since RTO should fire strictly after the head was sent. An exception is when the most recent RACK RTT measurement is larger than the (previous) RTO. To address this exception the head is always marked lost. Congestion control interaction: since we may not mark every packet lost, the congestion window may be more than 1 (inflight plus 1). But only one packet will be retransmitted after RTO, since tcp_retransmit_timer() calls tcp_retransmit_skb(...,segs=1). The connection still performs slow start from one packet (with Cubic congestion control). This commit was tested in an A/B test with Google web servers, and showed a reduction of 2% in (spurious) retransmits post timeout (SlowStartRetrans), and correspondingly reduced DSACKs (DSACKIgnoredOld) by 7%. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Reviewed-by:
Eric Dumazet <edumazet@google.com> Reviewed-by:
Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by:
Priyaranjan Jha <priyarjha@google.com> Signed-off-by:
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Yuchung Cheng authored
Create and export a new helper tcp_rack_skb_timeout and move tcp_is_rack to prepare the final RTO change. Signed-off-by:
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Yuchung Cheng authored
Previously when TCP times out, it first updates cwnd and ssthresh, marks packets lost, and then updates congestion state again. This was fine because everything not yet delivered is marked lost, so the inflight is always 0 and cwnd can be safely set to 1 to retransmit one packet on timeout. But the inflight may not always be 0 on timeout if TCP changes to mark packets lost based on packet sent time. Therefore we must first mark the packet lost, then set the cwnd based on the (updated) inflight. This is not a pure refactor. Congestion control may potentially break if it uses (not yet updated) inflight to compute ssthresh. Fortunately all existing congestion control modules does not do that. Also it changes the inflight when CA_LOSS_EVENT is called, and only westwood processes such an event but does not use inflight. This change has two other minor side benefits: 1) consistent with Fast Recovery s.t. the inflight is updated first before tcp_enter_recovery flips state to CA_Recovery. 2) avoid intertwining loss marking with state update, making the code more readable. Signed-off-by:
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Yuchung Cheng authored
Refactor using a new helper, tcp_timeout_mark_loss(), that marks packets lost upon RTO. Signed-off-by:
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Yuchung Cheng authored
The previous approach for the lost and retransmit bits was to wipe the slate clean: zero all the lost and retransmit bits, correspondingly zero the lost_out and retrans_out counters, and then add back the lost bits (and correspondingly increment lost_out). The new approach is to treat this very much like marking packets lost in fast recovery. We don’t wipe the slate clean. We just say that for all packets that were not yet marked sacked or lost, we now mark them as lost in exactly the same way we do for fast recovery. This fixes the lost retransmit accounting at RTO time and greatly simplifies the RTO code by sharing much of the logic with Fast Recovery. Signed-off-by:
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Yuchung Cheng authored
This is a rewrite of NewReno loss recovery implementation that is simpler and standalone for readability and better performance by using less states. Note that NewReno refers to RFC6582 as a modification to the fast recovery algorithm. It is used only if the connection does not support SACK in Linux. It should not to be confused with the Reno (AIMD) congestion control. Signed-off-by:
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Yuchung Cheng authored
This patch disables RFC6675 loss detection and make sysctl net.ipv4.tcp_recovery = 1 controls a binary choice between RACK (1) or RFC6675 (0). Signed-off-by:
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Yuchung Cheng authored
This patch adds support for the classic DUPACK threshold rule (#DupThresh) in RACK. When the number of packets SACKed is greater or equal to the threshold, RACK sets the reordering window to zero which would immediately mark all the unsacked packets below the highest SACKed sequence lost. Since this approach is known to not work well with reordering, RACK only uses it if no reordering has been observed. The DUPACK threshold rule is a particularly useful extension to the fast recoveries triggered by RACK reordering timer. For example data-center transfers where the RTT is much smaller than a timer tick, or high RTT path where the default RTT/4 may take too long. Note that this patch differs slightly from RFC6675. RFC6675 considers a packet lost when at least #DupThresh higher-sequence packets are SACKed. With RACK, for connections that have seen reordering, RACK continues to use a dynamically-adaptive time-based reordering window to detect losses. But for connections on which we have not yet seen reordering, this patch considers a packet lost when at least one higher sequence packet is SACKed and the total number of SACKed packets is at least DupThresh. For example, suppose a connection has not seen reordering, and sends 10 packets, and packets 3, 5, 7 are SACKed. RFC6675 considers packets 1 and 2 lost. RACK considers packets 1, 2, 4, 6 lost. There is some small risk of spurious retransmits here due to reordering. However, this is mostly limited to the first flight of a connection on which the sender receives SACKs from reordering. And RFC 6675 and FACK loss detection have a similar risk on the first flight with reordering (it's just that the risk of spurious retransmits from reordering was slightly narrower for those older algorithms due to the margin of 3*MSS). Also the minimum reordering window is reduced from 1 msec to 0 to recover quicker on short RTT transfers. Therefore RACK is more aggressive in marking packets lost during recovery to reduce the reordering window timeouts. Signed-off-by:
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Ivan Khoronzhuk authored
The early versions of am33xx devices, related to ES1.0 SoC revision have errata limiting mq support. That's the same errata as commit 7da11600 ("drivers: net: cpsw: add am335x errata workarround for interrutps") AM33xx Errata [1] Advisory 1.0.9 http://www.ti.com/lit/er/sprz360f/sprz360f.pdf After additional investigation were found that drivers w/a is propagated on all AM33xx SoCs and on DM814x. But the errata exists only for ES1.0 of AM33xx family, limiting mq support for revisions after ES1.0. So, disable mq support only for related SoCs and use separate polls for revisions allowing mq. Signed-off-by:
Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by:
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David S. Miller authored
Paolo Abeni says: ==================== sched: refactor NOLOCK qdiscs With the introduction of NOLOCK qdiscs, pfifo_fast performances in the uncontended scenario degraded measurably, especially after the commit eb82a994 ("net: sched, fix OOO packets with pfifo_fast"). This series restore the pfifo_fast performances in such scenario back the previous level, mainly reducing the number of atomic operations required to perform the qdisc_run() call. Even performances in the contended scenario increase measurably. Note: This series is on top of: sched: manipulate __QDISC_STATE_RUNNING in qdisc_run_* helpers ==================== Signed-off-by:
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Paolo Abeni authored
After the previous patch, for NOLOCK qdiscs, q->seqlock is always held when the dequeue() is invoked, we can drop any additional locking to protect such operation. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
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Paolo Abeni authored
So that we can use lockdep on it. The newly introduced sequence lock has the same scope of busylock, so it shares the same lockdep annotation, but it's only used for NOLOCK qdiscs. With this changeset we acquire such lock in the control path around flushing operation (qdisc reset), to allow more NOLOCK qdisc perf improvement in the next patch. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller authored
Daniel Borkmann says: ==================== pull-request: bpf-next 2018-05-17 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Provide a new BPF helper for doing a FIB and neighbor lookup in the kernel tables from an XDP or tc BPF program. The helper provides a fast-path for forwarding packets. The API supports IPv4, IPv6 and MPLS protocols, but currently IPv4 and IPv6 are implemented in this initial work, from David (Ahern). 2) Just a tiny diff but huge feature enabled for nfp driver by extending the BPF offload beyond a pure host processing offload. Offloaded XDP programs are allowed to set the RX queue index and thus opening the door for defining a fully programmable RSS/n-tuple filter replacement. Once BPF decided on a queue already, the device data-path will skip the conventional RSS processing completely, from Jakub. 3) The original sockmap implementation was array based similar to devmap. However unlike devmap where an ifindex has a 1:1 mapping into the map there are use cases with sockets that need to be referenced using longer keys. Hence, sockhash map is added reusing as much of the sockmap code as possible, from John. 4) Introduce BTF ID. The ID is allocatd through an IDR similar as with BPF maps and progs. It also makes BTF accessible to user space via BPF_BTF_GET_FD_BY_ID and adds exposure of the BTF data through BPF_OBJ_GET_INFO_BY_FD, from Martin. 5) Enable BPF stackmap with build_id also in NMI context. Due to the up_read() of current->mm->mmap_sem build_id cannot be parsed. This work defers the up_read() via a per-cpu irq_work so that at least limited support can be enabled, from Song. 6) Various BPF JIT follow-up cleanups and fixups after the LD_ABS/LD_IND JIT conversion as well as implementation of an optimized 32/64 bit immediate load in the arm64 JIT that allows to reduce the number of emitted instructions; in case of tested real-world programs they were shrinking by three percent, from Daniel. 7) Add ifindex parameter to the libbpf loader in order to enable BPF offload support. Right now only iproute2 can load offloaded BPF and this will also enable libbpf for direct integration into other applications, from David (Beckett). 8) Convert the plain text documentation under Documentation/bpf/ into RST format since this is the appropriate standard the kernel is moving to for all documentation. Also add an overview README.rst, from Jesper. 9) Add __printf verification attribute to the bpf_verifier_vlog() helper. Though it uses va_list we can still allow gcc to check the format string, from Mathieu. 10) Fix a bash reference in the BPF selftest's Makefile. The '|& ...' is a bash 4.0+ feature which is not guaranteed to be available when calling out to shell, therefore use a more portable variant, from Joe. 11) Fix a 64 bit division in xdp_umem_reg() by using div_u64() instead of relying on the gcc built-in, from Björn. 12) Fix a sock hashmap kmalloc warning reported by syzbot when an overly large key size is used in hashmap then causing overflows in htab->elem_size. Reject bogus attr->key_size early in the sock_hash_alloc(), from Yonghong. 13) Ensure in BPF selftests when urandom_read is being linked that --build-id is always enabled so that test_stacktrace_build_id[_nmi] won't be failing, from Alexei. 14) Add bitsperlong.h as well as errno.h uapi headers into the tools header infrastructure which point to one of the arch specific uapi headers. This was needed in order to fix a build error on some systems for the BPF selftests, from Sirio. 15) Allow for short options to be used in the xdp_monitor BPF sample code. And also a bpf.h tools uapi header sync in order to fix a selftest build failure. Both from Prashant. 16) More formally clarify the meaning of ID in the direct packet access section of the BPF documentation, from Wang. ==================== Signed-off-by:
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- 16 May, 2018 18 commits
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John Fastabend authored
When an error happens in the update sockmap element logic also pass the err up to the user. Fixes: e5cd3abc ("bpf: sockmap, refactor sockmap routines to work with hashmap") Signed-off-by:
John Fastabend <john.fastabend@gmail.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net>
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Yonghong Song authored
syzbot reported a kernel warning below: WARNING: CPU: 0 PID: 4499 at mm/slab_common.c:996 kmalloc_slab+0x56/0x70 mm/slab_common.c:996 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4499 Comm: syz-executor050 Not tainted 4.17.0-rc3+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:996 RSP: 0018:ffff8801d907fc58 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8801aeecb280 RCX: ffffffff8185ebd7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffe1 RBP: ffff8801d907fc58 R08: ffff8801adb5e1c0 R09: ffffed0035a84700 R10: ffffed0035a84700 R11: ffff8801ad423803 R12: ffff8801aeecb280 R13: 00000000fffffff4 R14: ffff8801ad891a00 R15: 00000000014200c0 __do_kmalloc mm/slab.c:3713 [inline] __kmalloc+0x25/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:517 [inline] map_get_next_key+0x24a/0x640 kernel/bpf/syscall.c:858 __do_sys_bpf kernel/bpf/syscall.c:2131 [inline] __se_sys_bpf kernel/bpf/syscall.c:2096 [inline] __x64_sys_bpf+0x354/0x4f0 kernel/bpf/syscall.c:2096 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe The test case is against sock hashmap with a key size 0xffffffe1. Such a large key size will cause the below code in function sock_hash_alloc() overflowing and produces a smaller elem_size, hence map creation will be successful. htab->elem_size = sizeof(struct htab_elem) + round_up(htab->map.key_size, 8); Later, when map_get_next_key is called and kernel tries to allocate the key unsuccessfully, it will issue the above warning. Similar to hashtab, ensure the key size is at most MAX_BPF_STACK for a successful map creation. Fixes: 81110384 ("bpf: sockmap, add hash map support") Reported-by: syzbot+e4566d29080e7f3460ff@syzkaller.appspotmail.com Signed-off-by:Yonghong Song <yhs@fb.com> Acked-by:
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David Beckett authored
BPF programs currently can only be offloaded using iproute2. This patch will allow programs to be offloaded using libbpf calls. Signed-off-by:
David Beckett <david.beckett@netronome.com> Reviewed-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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Mathieu Malaterre authored
__printf is useful to verify format and arguments. ‘bpf_verifier_vlog’ function is used twice in verifier.c in both cases the caller function already uses the __printf gcc attribute. Remove the following warning, triggered with W=1: kernel/bpf/verifier.c:176:2: warning: function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format] Signed-off-by:
Mathieu Malaterre <malat@debian.org> Signed-off-by:
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David Ahern authored
Only consider forwarding packets if ttl in received packet is > 1 and decrement ttl before handing off to bpf_redirect_map. Signed-off-by:
David Ahern <dsahern@gmail.com> Acked-by:
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Daniel Borkmann authored
John Fastabend says: ==================== In the original sockmap implementation we got away with using an array similar to devmap. However, unlike devmap where an ifindex has a nice 1:1 function into the map we have found some use cases with sockets that need to be referenced using longer keys. This series adds support for a sockhash map reusing as much of the sockmap code as possible. I made the decision to add sockhash specific helpers vs trying to generalize the existing helpers because (a) they have sockmap in the name and (b) the keys are different types. I prefer to be explicit here rather than play type games or do something else tricky. To test this we duplicate all the sockmap testing except swap out the sockmap with a sockhash. v2: fix file stats and add v2 tag v3: move tool updates into test patch, move bpftool updates into its own patch, and fixup the test patch stats to catch the renamed file and provide only diffs ± on that. v4: Add documentation to UAPI bpf.h v5: Add documentation to tools UAPI bpf.h v6: 'git add' test_sockhash_kern.c which was previously missing but was not causing issues because of typo in test script, noticed by Daniel. After this the git format-patch -M option no longer tracks the rename of the test_sockmap_kern files for some reason. I guess the diff has exceeded some threshold. ==================== Signed-off-by: -
John Fastabend authored
This adds the SOCKHASH map type to bpftools so that we get correct pretty printing. Signed-off-by:
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John Fastabend authored
This runs existing SOCKMAP tests with SOCKHASH map type. To do this we push programs into include file and build two BPF programs. One for SOCKHASH and one for SOCKMAP. We then run the entire test suite with each type. Signed-off-by:
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Rahul Lakkireddy authored
For T6, clip table is separated from main TCAM. So, update LE-TCAM collection logic to collect clip table TCAM as well. IPv6 takes 4 entries in clip table TCAM compared to 2 entries in main TCAM. Also, in case of errors, keep LE-TCAM collected so far and set the status to partial dump. Signed-off-by:
Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by:
Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by:
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David S. Miller authored
Michal Kalderon says: ==================== qed: LL2 fixes This series fixes some issues in ll2 related to synchronization and resource freeing ==================== Signed-off-by:
Ariel Elior <Ariel.Elior@cavium.com> Signed-off-by:
Michal Kalderon <Michal.Kalderon@cavium.com>
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Michal Kalderon authored
Stress on qedi/qedr load unload lead to list_del corruption. This is due to ll2 connection terminate freeing resources without verifying that no more ll2 processing will occur. This patch unregisters the ll2 status block before terminating the connection to assure this race does not occur. Fixes: 1d6cff4f ("qed: Add iSCSI out of order packet handling") Signed-off-by:
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Michal Kalderon authored
The ll2 flows of flushing the txq/rxq need to be synchronized with the regular fp processing. Caused list corruption during load/unload stress tests. Fixes: 0a7fb11c ("qed: Add Light L2 support") Signed-off-by:
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Michal Kalderon authored
Driver should free all pending isles once it gets a FLUSH cqe from FW. Part of iSCSI out of order flow. Fixes: 1d6cff4f ("qed: Add iSCSI out of order packet handling") Signed-off-by:
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YueHaibing authored
clk_disable_unprepare() already checks that the clock pointer is valid. No need to test it before calling it. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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YueHaibing authored
clk_disable_unprepare() already checks that the clock pointer is valid. No need to test it before calling it. Signed-off-by:
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Hemanth Puranik authored
This patch introduces ops structure for sgmii, This by ensures that we do not need dummy functions in case of emulation platforms. Signed-off-by:
Hemanth Puranik <hpuranik@codeaurora.org> Acked-by:
Timur Tabi <timur@codeaurora.org> Signed-off-by:
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David S. Miller authored
Subash Abhinov Kasiviswanathan says: ==================== net: qualcomm: rmnet: Updates 2018-05-14 Patch 1 adds tx_drops counter to more places. Patch 2 adds ethtool private stats support to make it easy to debug the checksum offload path. Patch 3 is a cleanup in command packet processing path. v1->v2: Fix the incorrect if / else statement in rmnet_map_checksum_downlink_packet() and define rmnet_ethtool_ops as static as mentioned by kbuild test robot. ==================== Signed-off-by: -
Subash Abhinov Kasiviswanathan authored
The command packet size is already checked once in rmnet_map_deaggregate() for the header, packet and trailer size, so this additional check is not needed. Signed-off-by:
Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by:
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