- 01 Mar, 2015 11 commits
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Daniel Borkmann authored
is_gpl_compatible and prog_type should be moved directly into bpf_prog as they stay immutable during bpf_prog's lifetime, are core attributes and they can be locked as read-only later on via bpf_prog_select_runtime(). With a bit of rearranging, this also allows us to shrink bpf_prog_aux to exactly 1 cacheline. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
As discussed recently and at netconf/netdev01, we want to prevent making bpf_verifier_ops registration available for modules, but have them at a controlled place inside the kernel instead. The reason for this is, that out-of-tree modules can go crazy and define and register any verfifier ops they want, doing all sorts of crap, even bypassing available GPLed eBPF helper functions. We don't want to offer such a shiny playground, of course, but keep strict control to ourselves inside the core kernel. This also encourages us to design eBPF user helpers carefully and generically, so they can be shared among various subsystems using eBPF. For the eBPF traffic classifier (cls_bpf), it's a good start to share the same helper facilities as we currently do in eBPF for socket filters. That way, we have BPF_PROG_TYPE_SCHED_CLS look like it's own type, thus one day if there's a good reason to diverge the set of helper functions from the set available to socket filters, we keep ABI compatibility. In future, we could place all bpf_prog_type_list at a central place, perhaps. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
This gets rid of CONFIG_BPF_SYSCALL ifdefs in the socket filter code, now that the BPF internal header can deal with it. While going over it, I also changed eBPF related functions to a sk_filter prefix to be more consistent with the rest of the file. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
Socket filter code and other subsystems with upcoming eBPF support should not need to deal with the fact that we have CONFIG_BPF_SYSCALL defined or not. Having the bpf syscall as a config option is a nice thing and I'd expect it to stay that way for expert users (I presume one day the default setting of it might change, though), but code making use of it should not care if it's actually enabled or not. Instead, hide this via header files and let the rest deal with it. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
We need to export BPF_PSEUDO_MAP_FD to user space, as it's used in the ELF BPF loader where instructions are being loaded that need map fixups. An initial stage loads all maps into the kernel, and later on replaces related instructions in the eBPF blob with BPF_PSEUDO_MAP_FD as source register and the actual fd as immediate value. The kernel verifier recognizes this keyword and replaces the map fd with a real pointer internally. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
We can move bpf_map_ops and bpf_verifier_ops and other structs into ro section, bpf_map_type_list and bpf_prog_type_list into read mostly. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
Now that we have BPF_PROG_TYPE_SOCKET_FILTER up and running, we can remove the test stubs which were added to get the verifier suite up. We can just let the test cases probe under socket filter type instead. In the fill/spill test case, we cannot (yet) access fields from the context (skb), but we may adapt that test case in future. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Ursula Braun says: ==================== s390: network patches for net-next here are some s390 related patches for net-next ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Ursula Braun authored
remove Frank Blaschka as S390 NETWORK DRIVERS maintainer Acked-by:
Frank Blaschka <blaschka@linux.vnet.ibm.com> Signed-off-by:
Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Stefan Raspl authored
This patch adjusts two instances where we were using the (too big) struct qeth_ipacmd_setadpparms size instead of the commands' actual size. This didn't do any harm, but wasted a few bytes. Signed-off-by:
Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by:
Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Ursula Braun authored
claw devices are outdated and no longer supported. This patch removes the claw driver. Signed-off-by:
Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 28 Feb, 2015 7 commits
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Eric Dumazet authored
tcp_fastopen_create_child() is static and should not be exported. tcp4_gso_segment() and tcp6_gso_segment() should be static. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Andrew Schwartzmeyer authored
This adds support for reporting the actual and maximum combined channels count of the hv_netvsc driver via 'ethtool --show-channels'. This required adding 'max_chn' to 'struct netvsc_device', and assigning it 'rsscap.num_recv_que' in 'rndis_filter_device_add'. Now we can access the combined maximum channel count via 'struct netvsc_device' in the ethtool callback. Signed-off-by:
Andrew Schwartzmeyer <andrew@schwartzmeyer.com> Signed-off-by:
Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Eric Dumazet says: ==================== tcp: tso improvements This patch serie reworks tcp_tso_should_defer() a bit to get less bursts, and better ECN behavior. We also removed tso_deferred field in tcp socket. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Another TCP issue is triggered by ECN. Under pressure, receiver gets ECN marks, and send back ACK packets with ECE TCP flag. Senders enter CA_CWR state. In this state, tcp_tso_should_defer() is short cut : if (icsk->icsk_ca_state != TCP_CA_Open) goto send_now; This means that about all ACK packets we receive are triggering a partial send, and because cwnd is kept small, we can only send a small amount of data for each incoming ACK, which in return generate more ACK packets. Allowing CA_Open and CA_CWR states to enable TSO defer in tcp_tso_should_defer() brings performance back : TSO autodefer has more chance to defer under pressure. This patch increases TSO and LRO/GRO efficiency back to normal levels, and does not impact overall ECN behavior. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
Yuchung Cheng <ycheng@google.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
With sysctl_tcp_min_tso_segs being 4, it is very possible that tcp_tso_should_defer() decides not sending last 2 MSS of initial window of 10 packets. This also applies if autosizing decides to send X MSS per GSO packet, and cwnd is not a multiple of X. This patch implements an heuristic based on age of first skb in write queue : If it was sent very recently (less than half srtt), we can predict that no ACK packet will come in less than half rtt, so deferring might cause an under utilization of our window. This is visible on initial send (IW10) on web servers, but more generally on some RPC, as the last part of the message might need an extra RTT to get delivered. Tested: Ran following packetdrill test // A simple server-side test that sends exactly an initial window (IW10) // worth of packets. `sysctl -e -q net.ipv4.tcp_min_tso_segs=4` 0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 +.1 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7> +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 6> +.1 < . 1:1(0) ack 1 win 257 +0 accept(3, ..., ...) = 4 +0 write(4, ..., 14600) = 14600 +0 > . 1:5841(5840) ack 1 win 457 +0 > . 5841:11681(5840) ack 1 win 457 // Following packet should be sent right now. +0 > P. 11681:14601(2920) ack 1 win 457 +.1 < . 1:1(0) ack 14601 win 257 +0 close(4) = 0 +0 > F. 14601:14601(0) ack 1 +.1 < F. 1:1(0) ack 14602 win 257 +0 > . 14602:14602(0) ack 2 Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
Yuchung Cheng <ycheng@google.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
TSO relies on ability to defer sending a small amount of packets. Heuristic is to wait for future ACKS in hope to send more packets at once. Current algorithm uses a per socket tso_deferred field as a pseudo timer. This pseudo timer relies on future ACK, but there is no guarantee we receive them in time. Fix would be to use a real timer, but cost of such timer is probably too expensive for typical cases. This patch changes the logic to test the time of last transmit, because we should not add bursts of more than 1ms for any given flow. We've used this patch for about two years at Google, before FQ/pacing as it would reduce a fair amount of bursts. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
Yuchung Cheng <ycheng@google.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
Currently the usbnet core does not update the tx_packets statistic for drivers with FLAG_MULTI_PACKET and there is no hook in the TX completion path where they could do this. cdc_ncm and dependent drivers are bumping tx_packets stat on the transmit path while asix and sr9800 aren't updating it at all. Add a packet count in struct skb_data so these drivers can fill it in, initialise it to 1 for other drivers, and add the packet count to the tx_packets statistic on completion. Signed-off-by:
Ben Hutchings <ben.hutchings@codethink.co.uk> Tested-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 27 Feb, 2015 16 commits
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David S. Miller authored
Erik Hugne says: ==================== tipc: bug fix and some improvements Most important is a fix for a nullptr exception that would occur when name table subscriptions fail. The remaining patches are performance improvements and cosmetic changes. v2: remove unnecessary whitespace in patch #2 ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Erik Hugne authored
With the exception of infiniband media which does not use media offsets, the media address is always located at offset 4 in the media info field as defined by the protocol, so we move the definition to the generic bearer.h Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Erik Hugne authored
The TIPC_MEDIA_ADDR_SIZE and TIPC_MEDIA_ADDR_OFFSET names are misleading, as they actually define the size and offset of the whole media info field and not the address part. This patch does not have any functional changes. Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Erik Hugne authored
If a bearer is disabled by manual intervention, all links over that bearer should be purged, indicated with the 'shutting_down' flag. Otherwise tipc will get confused if a new bearer is enabled using a different media type. Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Erik Hugne authored
If a subscription request is sent to a topology server connection, and any error occurs (malformed request, oom or limit reached) while processing this request, TIPC should terminate the subscriber connection. While doing so, it tries to access fields in an already freed (or never allocated) subscription element leading to a nullpointer exception. We fix this by removing the subscr_terminate function and terminate the connection immediately upon any subscription failure. Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Reviewed-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Erik Hugne authored
The TIPC name distributor pushes topology updates to the cluster neighbors. Currently this is done in a unicast manner, and the skb holding the update is cloned for each cluster member. This is unnecessary, as we only modify the destnode field in the header so we change it to do pskb_copy instead. Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Reviewed-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jiri Pirko authored
This patch allows TSO being set/unset on the master, so that GSO segmentation is done after team layer. Similar patch is present for bonding: b0ce3508 ("bonding: allow TSO being set on bonding master") and bridge: f902e881 ("bridge: Add ability to enable TSO") Suggested-by:
Jiri Prochazka <jprochaz@redhat.com> Signed-off-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Alexander Duyck says: ==================== fib_trie: Remove leaf_info structure This patch set removes the leaf_info structure from the IPv4 fib_trie. The general idea is that the leaf_info structure itself only held about 6 actual bits of data, beyond that it was mostly just waste. As such we can drop the structure, move the 1 byte representing the prefix/suffix length into the fib_alias and just link it all into one list. My testing shows that this saves somewhere between 4 to 10ns depending on the type of test performed. I'm suspecting that this represents 1 to 2 L1 cache misses saved per look-up. One side effect of this change is that semantic_match_miss will now only increment once per leaf instead of once per leaf_info miss. However the stat is already skewed now that we perform a preliminary check on the leaf as a part of the look-up. I also have gone through and addressed a number of ordering issues in the first patch since I had misread the behavior of list_add_tail. I have since run some additional testing and verified the resulting lists are in the same order when combining multiple prefix length and tos values in a single leaf. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
At this point the leaf_info hash is redundant. By adding the suffix length to the fib_alias hash list we no longer have need of leaf_info as we can determine the prefix length from fa_slen. So we can compress things by dropping the leaf_info structure from fib_trie and instead directly connect the leaves to the fib_alias hash list. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
Make use of an empty spot in the alias to store the suffix length so that we don't need to pull that information from the leaf_info structure. This patch also makes a slight change to the user statistics. Instead of incrementing semantic_match_miss once per leaf_info miss we now just increment it once per leaf if a match was not found. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This replaces the prefix length variable in the leaf_info structure with a suffix length value, or host identifier length in bits. By doing this it makes it easier to sort out since the tnodes and leaf are carrying this value as well since it is compatible with the ->pos field in tnodes. I also cleaned up one spot that had some list manipulation that could be simplified. I basically updated it so that we just use hlist_add_head_rcu instead of calling hlist_add_before_rcu on the first node in the list. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
There isn't any advantage to having it as a list and by making it an hlist we make the fib_alias more compatible with the list_info in terms of the type of list used. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Madhu Challa says: ==================== Multicast group join/leave at ip level This series enables configuring multicast group join/leave at ip level by extending the "ip address" command. It adds a new control socket mc_autojoin_sock and ifa_flag IFA_F_MCAUTOJOIN to invoke the corresponding igmp group join/leave api. Since the igmp group join/leave api takes the rtnl_lock the code had to be refactored by adding a shim layer prefixed by __ that can be invoked by code that already has the rtnl_lock. This way we avoid proliferation of work queues. The first patch in this series does the refactoring for igmp v6. Its based on igmp v4 changes that were added by Eric Dumazet. The second patch in this series does the group join/leave based on the setting of the IFA_F_MCAUTOJOIN flag. v5: - addressed comments from Daniel Borkmann. - removed blank line in patch 1/2 - removed unused variable, const arg in patch 2/2 v4: - addressed comments from Yoshifuji Hideaki. - Remove WARN_ON not needed because we return a value from v2. - addressed comments from Daniel Borkmann. - rename sock to mc_autojoin_sk - ip_mc_config() pass ifa so it needs one less argument. - igmp_net_{init|destroy}() use inet_ctl_sock_{create|destroy} - inet_rtm_newaddr() change scope of ret. - igmp_net_init() no need to initialize sock to NULL. v3: - addressed comments from David Miller. - fixed indentation and local variable order. v2: - addressed comments from Eric Dumazet. - removed workqueue and call __ip_mc_{join|leave}_group or __ipv6_sock_mc_{join|drop} ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Madhu Challa authored
Joining multicast group on ethernet level via "ip maddr" command would not work if we have an Ethernet switch that does igmp snooping since the switch would not replicate multicast packets on ports that did not have IGMP reports for the multicast addresses. Linux vxlan interfaces created via "ip link add vxlan" have the group option that enables then to do the required join. By extending ip address command with option "autojoin" we can get similar functionality for openvswitch vxlan interfaces as well as other tunneling mechanisms that need to receive multicast traffic. The kernel code is structured similar to how the vxlan driver does a group join / leave. example: ip address add 224.1.1.10/24 dev eth5 autojoin ip address del 224.1.1.10/24 dev eth5 Signed-off-by:
Madhu Challa <challa@noironetworks.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Madhu Challa authored
Based on the igmp v4 changes from Eric Dumazet. 959d10f6("igmp: add __ip_mc_{join|leave}_group()") These changes are needed to perform igmp v6 join/leave while RTNL is held. Make ipv6_sock_mc_join and ipv6_sock_mc_drop wrappers around __ipv6_sock_mc_join and __ipv6_sock_mc_drop to avoid proliferation of work queues. Signed-off-by:
Madhu Challa <challa@noironetworks.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tom Herbert authored
In the unlikely event that skb_get_hash is unable to deduce a hash in udp_flow_src_port we use a consistent random value instead. This is specified in GRE/UDP draft section 3.2.1: https://tools.ietf.org/html/draft-ietf-tsvwg-gre-in-udp-encap-04Signed-off-by:
Tom Herbert <therbert@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 26 Feb, 2015 5 commits
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Roopa Prabhu authored
my previous patch skipped vlan range optimizations during skb size calculations for simplicity. This incremental patch considers vlan ranges during skb size calculations. This leads to a bit of code duplication in the fill and size calculation functions. But, I could not find a prettier way to do this. will take any suggestions. Previously, I had reused the existing br_get_link_af_size size calculation function to calculate skb size for notifications. Reusing it this time around creates some change in behaviour issues for the usual .get_link_af_size callback. This patch adds a new br_get_link_af_size_filtered() function to base the size calculation on the incoming filter flag and include vlan ranges. Signed-off-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Reviewed-by:
Scott Feldman <sfeldma@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Scott Feldman says: ==================== rocker cleanups Pushing out some rocker cleanups I've had in my queue for a while. Nothing major, just some sync-up with changes that already went into device code (hard-coding desc err return values and lport renaming). Also fixup port fowarding transitions prompted by some DSA discussions about how to restore port state when port leaves bridge. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Scott Feldman authored
Cleanup the port forwarding state transitions for the cases when the port joins or leaves a bridge, or is brought admin UP or DOWN. When port is bridged, we can rely on bridge driver putting port in correct state using STP callback into port driver, regardless if bridge is enabled for STP or not. When port is not bridged, we can reuse some of the STP code to enabled or disable forwarding depending on UP or DOWN. Tested by trying all the transitions from bridge/not bridge, and UP/DOWN, and verifying port is in the correct forwarding state after each transition. Signed-off-by:
Scott Feldman <sfeldma@gmail.com> Acked-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Scott Feldman authored
This is just a rename of physical ports from "lport" to "pport". Not a functional change. OF-DPA uses logical ports (lport) for tunnels, but the driver (and device) were using "lport" for physical ports. Renaming physical ports references to "pport", freeing up "lport" for use later with tunnels. Signed-off-by:
Scott Feldman <sfeldma@gmail.com> Acked-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Scott Feldman authored
The rocker device returns error codes if something goes wrong with descriptor processing. Originally the device used standard errno codes for different errors, but since those errno codes aren't portable across ARCHs, the device now returns hard-coded error codes that stay constant across diff ARCHs. Fix driver to use those same hard-coded values. Signed-off-by:
Scott Feldman <sfeldma@gmail.com> Acked-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 25 Feb, 2015 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-nextDavid S. Miller authored
Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates 2015-02-24 This series contains updates to i40e and i40evf only, which bumps their versions to i40e 1.2.9 and i40evf 1.2.3. Paul fixes i40e_debug_aq() for big endian machines by adding the appropriate LExx_TO_CPU wrappers. Catherine adds a requested speed variable to the link_status to store the last speeds we requested from the firmware and use the advertised speed settings in get_settings in ethtool now that we have it. Due to the new code addition, she also refactors get_settings to improve readability and to accommodate some of the longer lines of code by adding two functions i40e_get_settings_link_up() and i40e_get_settings_link_down(). Carolyn adds a struct to the VSI struct to keep track of RXNFC settings done via ethtool. Adds more information to the interrupt vector names, specifically to the VF misc vector name so that we can distinguish between all the interrupts. Ashish enables the i40evf driver to enable debug prints via ethtool. Mitch updates i40e to enable packet split only when IOMMU is in use, since it shows a distinct advantage over the single-buffer path because it minimizes DMA mapping and unmapping. Also adds the receive routine in use to the features log message to be able to print the receive packet split status. Greg adds the ability to get, set and commit permanently the NPAR partition BW configuration through configfs. Enables an application to query the i40e driver's private flags to get the status of NPAR enablement via ethtool. Neerav adds support for bridge offload ndo_ops getlink and setlink to enable bridge hardware mode as per the mode set via IFLA_BRIDGE_MODE. The support is only enabled in the case of a PF VSI and not available for any other VSI type. Kevin fixes i40e by ensuring the BUF and FLAG_RD flags are set for indirect admin queue command. Vasu updates the driver to setup FCoE netdev device type as "fcoe", so that it shows up in sysfs as FCoE device. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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