- 04 Nov, 2014 15 commits
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Florent Fourcot authored
The "else" block is on several lines and use bracket. Signed-off-by:
Florent Fourcot <florent.fourcot@enst-bretagne.fr> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Fabian Frederick authored
Signed-off-by:
Fabian Frederick <fabf@skynet.be> Signed-off-by:
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David S. Miller authored
Florian Westphal says: ==================== net: allow setting ecn via routing table Here is v4 of the patchset, its exactly the same as v3 except in patch3/3 where I added the missing 'const' qualifier to a function argument that Eric spotted during review. I preserved Erics Acks so that he doesn't have to resend them. v3 cover letter: When using syn cookies, then do not simply trust that the echoed timestamp was not modified to make sure that ecn is not turned on magically when it is disabled on the host. The first two patches, which were not part of earlier series, prepare the cookie code for the ecn route metrics change by allowing is to more easily use the existing dst object for ecn validation. The 3rd patch adds the ecn route metric feature support. It is almost the same as in v2, except that we'll now also test the dst_features when decoding a syn cookie timestamp that indicates ecn support. These three patches then allow turning on explicit congestion notification based on the destination network. For example, assuming the default tcp_ecn sysctl '2', the following will enable ecn (tcp_ecn=1 behaviour, i.e. request ecn to be enabled for a tcp connection) for all connections to hosts inside the 192.168.2/24 network: ip route change 192.168.2.0/24 dev eth0 features ecn Having a more fine-grained per-route setting can be beneficial for various reasons, for example 1) within data centers, or 2) local ISPs may deploy ECN support for their own video/streaming services [1], etc. Joint work with Daniel Borkmann, feature suggested by Hannes Frederic Sowa. The patch to enable this in iproute2 will be posted shortly, it is currently also available here: http://git.breakpoint.cc/cgit/fw/iproute2.git/commit/?h=iproute_features&id=8843d2d8973fb81c78a7efe6d42e3a17d739003e [1] http://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf, p.15 ==================== Signed-off-by:
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Florian Westphal authored
This patch allows to set ECN on a per-route basis in case the sysctl tcp_ecn is not set to 1. In other words, when ECN is set for specific routes, it provides a tcp_ecn=1 behaviour for that route while the rest of the stack acts according to the global settings. One can use 'ip route change dev $dev $net features ecn' to toggle this. Having a more fine-grained per-route setting can be beneficial for various reasons, for example, 1) within data centers, or 2) local ISPs may deploy ECN support for their own video/streaming services [1], etc. There was a recent measurement study/paper [2] which scanned the Alexa's publicly available top million websites list from a vantage point in US, Europe and Asia: Half of the Alexa list will now happily use ECN (tcp_ecn=2, most likely blamed to commit 255cac91 ("tcp: extend ECN sysctl to allow server-side only ECN") ;)); the break in connectivity on-path was found is about 1 in 10,000 cases. Timeouts rather than receiving back RSTs were much more common in the negotiation phase (and mostly seen in the Alexa middle band, ranks around 50k-150k): from 12-thousand hosts on which there _may_ be ECN-linked connection failures, only 79 failed with RST when _not_ failing with RST when ECN is not requested. It's unclear though, how much equipment in the wild actually marks CE when buffers start to fill up. We thought about a fallback to non-ECN for retransmitted SYNs as another global option (which could perhaps one day be made default), but as Eric points out, there's much more work needed to detect broken middleboxes. Two examples Eric mentioned are buggy firewalls that accept only a single SYN per flow, and middleboxes that successfully let an ECN flow establish, but later mark CE for all packets (so cwnd converges to 1). [1] http://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf, p.15 [2] http://ecn.ethz.ch/ Joint work with Daniel Borkmann. Reference: http://thread.gmane.org/gmane.linux.network/335797Suggested-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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Florian Westphal authored
The function cookie_check_timestamp(), both called from IPv4/6 context, is being used to decode the echoed timestamp from the SYN/ACK into TCP options used for follow-up communication with the peer. We can remove ECN handling from that function, split it into a separate one, and simply rename the original function into cookie_decode_options(). cookie_decode_options() just fills in tcp_option struct based on the echoed timestamp received from the peer. Anything that fails in this function will actually discard the request socket. While this is the natural place for decoding options such as ECN which commit 172d69e6 ("syncookies: add support for ECN") added, we argue that in particular for ECN handling, it can be checked at a later point in time as the request sock would actually not need to be dropped from this, but just ECN support turned off. Therefore, we split this functionality into cookie_ecn_ok(), which tells us if the timestamp indicates ECN support AND the tcp_ecn sysctl is enabled. This prepares for per-route ECN support: just looking at the tcp_ecn sysctl won't be enough anymore at that point; if the timestamp indicates ECN and sysctl tcp_ecn == 0, we will also need to check the ECN dst metric. This would mean adding a route lookup to cookie_check_timestamp(), which we definitely want to avoid. As we already do a route lookup at a later point in cookie_{v4,v6}_check(), we can simply make use of that as well for the new cookie_ecn_ok() function w/o any additional cost. Joint work with Daniel Borkmann. Acked-by:
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Florian Westphal authored
Was a bit more difficult to read than needed due to magic shifts; add defines and document the used encoding scheme. Joint work with Daniel Borkmann. Acked-by:
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Fabian Frederick authored
use standard uppercase for definitions Signed-off-by:
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Fabian Frederick authored
else is unnecessary after return 0 in __udp4_lib_rcv() Signed-off-by:
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Fabian Frederick authored
remove __inline__ / inline and let compiler decide what to do with static functions Inspired-by:
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Fabian Frederick authored
static values are automatically initialized to 0 Signed-off-by:
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Fabian Frederick authored
Signed-off-by:
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Fabian Frederick authored
Signed-off-by:
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Fabian Frederick authored
Also add blank line after structure declarations Signed-off-by:
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Fabian Frederick authored
Signed-off-by:
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Fabian Frederick authored
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- 03 Nov, 2014 23 commits
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Eric Dumazet authored
Yaogong replaces TCP out of order receive queue by an RB tree. As netem already does a private skb->{next/prev/tstamp} union with a 'struct rb_node', lets do this in a cleaner way. Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-nextDavid S. Miller authored
Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates 2014-11-03 This series contains updates to i40e and i40evf. Akeem adds a check for i40e so that flow director flush and reinit are not done when flow director is not enabled. Mitch fixes the i40evf driver to properly handle multiple admin queue messages, by reinit the msg_size field each time we go through the loop. Without this, we may receive truncated messages due to the firmware thinking we have insufficient buffer size. Also fixes the link checking logic to only check the carrier state if the interface is actually open, which allows link changes to be reported correctly without spamming the VFs. Updates i40e to inset the VSI ID in the QTX_CTL register when configuring queues for VMDq VSIs. Paul adds support for 10G-base-T in i40evf. Jesse fixes i40e where the call to irq_dynamic_disable() was turning off the interrupt completely when trying to set ITR to 0 (for lowest moderation). Shannon removes debugfs dump stats function, since it was not being kept up-to-date and was redundant with the ethtool output. Also, scales back the LAN MSIx usage to force queue/vector sharing and leave some vectors for Flow Director, VMDq, etc. when there are more cores than vectors available to the PF. Cleans up the error reporting for get_lump() resource tracking errors. Also adds a check for the debug module parameter earlier to be able to catch the early configuration phase admin queue messages. ==================== Signed-off-by: -
Sudip Mukherjee authored
this is check for dev is unnecessary, as we are already checking dev after allocating it via alloc_netdev, and jumping to label: out if it is NULL. Signed-off-by:
Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by:
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Denis Kirjanov authored
Add BPF extension SKF_AD_PKTTYPE to ppc JIT to load skb->pkt_type field. Before: [ 88.262622] test_bpf: #11 LD_IND_NET 86 97 99 PASS [ 88.265740] test_bpf: #12 LD_PKTTYPE 109 107 PASS After: [ 80.605964] test_bpf: #11 LD_IND_NET 44 40 39 PASS [ 80.607370] test_bpf: #12 LD_PKTTYPE 9 9 PASS CC: Alexei Starovoitov<alexei.starovoitov@gmail.com> CC: Michael Ellerman<mpe@ellerman.id.au> Cc: Matt Evans <matt@ozlabs.org> Signed-off-by:
Denis Kirjanov <kda@linux-powerpc.org> v2: Added test rusults Signed-off-by:
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David S. Miller authored
Or Gerlitz says: ==================== Mellanox ethernet driver update Oct-30-2014 The 1st patch from Saeed fixes a bug in the last net-next batch where a VF could get access to set port configuration, the next patch from Amir fixes a race in the port VPI logic. Next are two performance patches from Ido. The patch to add checksum complete status on GRE and such packets was preceded with a patch that converted the driver to only use napi_gro_receive vs. the current code which goes through napi_gro_frags on it's usual track. Eric D. has some thoughts and suggestions on that change for which we want to take the time and consider, so for the time being dropped that patch and the ones that depend on it. Changes from V0: - have the caller to provide the __GFP_COLD hint to the service function - dropped the patch that changes the GRO logic and the subsequent dependent patches. ==================== Signed-off-by: -
Matan Barak authored
Add code to issue CONFIG_DEV "get" firmware command. This command is used in order to obtain certain parameters used for supporting various RX checksumming options and vxlan UDP port. The GET operation is allowed for VFs too. Signed-off-by:
Matan Barak <matanb@mellanox.com> Signed-off-by:
Shani Michaeli <shanim@mellanox.com> Signed-off-by:
Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by:
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Ido Shamay authored
Needed in order to get cache cold pages (L3 flushed) for HW scatter. Otherwise memory may flush those entries when the packet comes from PCI, causing back pressure resulting in BW decrease. Signed-off-by:
Ido Shamay <idos@mellanox.com> Signed-off-by:
Amir Vadai <amirv@mellanox.com> Signed-off-by:
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Ido Shamay authored
When IP_ALIGN has a non zero value, hardware will write to a non aligned address. The only reader from this address is when copying the header from the first frag into the linear buffer (further access to the IP address will be from the linear buffer, in which the headers are aligned). Since the penalty of non align access by the hardware is greater than the software memcpy, changing the frag_align to always be 0. Signed-off-by:
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Amir Vadai authored
We need to protect set_port_type() for concurrency, as the sysfs code could call it from mutliple contexts in parallel. The port_mutex is not enough because we need to protect from concurrent modification of 'info' and stopping of the port sensing work. Signed-off-by:
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Saeed Mahameed authored
Added wrapper to the ACCESS_REG command for handling guest HW registers access, preventing write operations, but do allow reads. This will prevent SRIOV guests to change port PTYS configuration, such as speed/advertised link modes. Fixes: adbc7ac5 ('net/mlx4_core: Introduce ACCESS_REG CMD [...]') Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
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Eric Dumazet authored
net_rx_action() can mask irqs a single time to transfert sd->poll_list into a private list, for a very short duration. Then, napi_complete() can avoid masking irqs again, and net_rx_action() only needs to mask irq again in slow path. This patch removes 2 couples of irq mask/unmask per typical NAPI run, more if multiple napi were triggered. Note this also allows to give control back to caller (do_softirq()) more often, so that other softirq handlers can be called a bit earlier, or ksoftirqd can be wakeup earlier under pressure. This was developed while testing an alternative to RX interrupt mitigation to reduce latencies while keeping or improving GRO aggregation on fast NIC. Idea is to test napi->gro_list at the end of a napi->poll() and reschedule one NAPI poll, but after servicing a full round of softirqs (timers, TX, rcu, ...). This will be allowed only if softirq is currently serviced by idle task or ksoftirqd, and resched not needed. Signed-off-by:
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Eric Dumazet authored
flow_limit in struct softnet_data is only read from local cpu and can be moved to fill a hole, reducing softnet_data size by 64 bytes on x86_64 While we are at it, move output_queue, output_queue_tailp and completion_queue, so that rx / tx paths touch a single cache line. Signed-off-by:
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Mitch Williams authored
Fix a few problems with our parsing of the MDET registers: * Queue IDs are longer than 8 bits * Queue IDs are absolute for the device and the base queue must be subtracted out. * VF IDs are longer than 8 bits * Use the MASK define to mask the event value, instead of the SHIFT define. Change-ID: I3dc7237f480c02e1192a2a8ea782f8a02ab2a8b7 Reported-by:
Marc Neustadter <marc.neustadter@intel.com> Signed-off-by:
Mitch Williams <mitch.a.williams@intel.com> Signed-off-by:
Patrick Lu <patrick.lu@intel.com> Tested-by:
Jim Young <jamesx.m.young@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Mitch Williams authored
We must insert the VSI ID in the QTX_CTL register when configuring queues for VMDQ VSIs. Change-ID: Iedfe36bd42ca0adc90a7cc2b7cf04795a98f4761 Reported-by:
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Shannon Nelson authored
Check the debug module parameter earlier to be able to catch the early configuration phase adminq messages. Change-ID: Ic84fabd72393489bbf96042de770790a80fd8468 Signed-off-by:
Shannon Nelson <shannon.nelson@intel.com> Signed-off-by:
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Shannon Nelson authored
Tweak and homogenize the error reporting for get_lump() resource tracking errors. Change-ID: I11330161cc6ad8d04371c499c63071c816171c3b Signed-off-by:
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Shannon Nelson authored
When there are more cores than vectors available to the PF, scale back the LAN msix usage to force queue/vector sharing and leave some vectors for Flow Director, VMDq, etc. Change-ID: Ie0317732eb85ad8d851d7da7d9af86b1bf8c21ad Signed-off-by:
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Shannon Nelson authored
The debugfs dump stats wasn't being kept up-to-date, was redundant with the ethtool output, and didn't offer any useful additional info. Rather than continue trying to keep them aligned, just remove the debugfs command. Change-ID: Id130ed9aef01c6369ab662c7b4c5ec5b1dbc5b40 Signed-off-by:
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Jesse Brandeburg authored
The call to irq_dynamic_disable was turning off the interrupt completely when trying to set ITR to 0 (for lowest moderation). Just remove the call as setting the values to 0 later in this function will suffice. Change-ID: I47caf1ecbe65653cf63ec833db93094cd83fd84d Signed-off-by:
Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by:
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Paul M Stillwell Jr authored
Add 10G-Base-T support in i40evf. Change-ID: I98a1c3138d7d6572fe7903a7c1c4692cae3260d5 Signed-off-by:
Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com> Signed-off-by:
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Mitch Williams authored
If the interface is closed, but VFs exist, current code will spam all the VFs with link messages every second. This is because the link event code was looking at netif_carrier_ok() without checking to see if the interface was actually open. Refactor the logic to only check the carrier state if the interface is actually open. This allows link changes to be reported correctly without spamming the VFs. Change-ID: If136e79bb3820d21ea4e39e332e8a9604efc2b2a Signed-off-by:
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Mitch Williams authored
When we receive an admin queue message, the msg_size field in the event struct gets overwritten. Because of this, we need to reinit the field each time we go through the loop. Without this we may receive truncated messages due to the firmware thinking we have insufficient buffer size. Change-ID: I21dcca5114d91365d731169965ce3ffec0e4a190 Signed-off-by:
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Akeem G Abodunrin authored
When FD_SB/ATR are not enabled, do not allow flow director flush and reinit. Change-ID: Iafe261c1862992981615815551abd1ed9fada0a8 Signed-off-by:
Akeem G Abodunrin <akeem.g.abodunrin@intel.com> Signed-off-by:
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- 01 Nov, 2014 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Conflicts: drivers/net/phy/marvell.c Simple overlapping changes in drivers/net/phy/marvell.c Signed-off-by: -
David S. Miller authored
Reported-by:
Meelis Roos <mroos@linux.ee> Tested-by:
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