- 22 Nov, 2015 1 commit
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David Ahern authored
Add tracepoint to show fib6 table lookups and result. Signed-off-by:
David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 20 Nov, 2015 26 commits
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Eric Dumazet authored
napi_alloc_skb() can return NULL. We should not crash should this happen. Fixes: 93f93a44 ("net: move skb_mark_napi_id() into core networking stack") Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Simon Horman authored
The GTI.TIV may be set to 2GHz^2 / rate, where rate is that of the clock of the device. Rather than assuming a rate of 130MHz use the actual rate of the clock. The motivation for this is to use the correct rate on the r8a7795/Salvator-X which is advertised as 133MHz but may differ depending on the extal present on the Salvator-X. Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Signed-off-by:
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Ondrej Zary authored
Add suspend/resume support to dl2k driver. This requires RX/TX rings to be reset so split out the required functionality from alloc_list() into new rio_reset_ring(). Tested on Asus NX1101 (IP1000A) and D-Link DGE-550T (DL-2000). Signed-off-by:
Ondrej Zary <linux@rainbow-software.org> Signed-off-by:
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Ondrej Zary authored
Move HW init and stop into separate functions. Request IRQ only after the HW has been reset (so interrupts are disabled and no stale interrupts are pending). Signed-off-by:
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Ondrej Zary authored
If memory allocation fails in alloc_list(), free the already allocated memory and return -ENOMEM. In rio_open(), call alloc_list() first and abort if it fails. Move HW access (set RFDListPtr) out ot alloc_list(). Signed-off-by:
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David S. Miller authored
Jon Maloy says: ==================== tipc: some cleanups and improvements This series mostly contains cleanups and cosmetic code changes. The only real functional change is in #4 and #5, where we change the locking structure for nodes and links in order to permit full concurrency between links working in parallel on different interfaces. Since the groundwork for this has been done in previous commit series, this change constitutes only the final, small step to achieve that goal. ==================== Signed-off-by: -
Jon Paul Maloy authored
The number of variables with Hungarian notation (l_ptr, n_ptr etc.) has been significantly reduced over the last couple of years. We now root out the last traces of this practice. There are no functional changes in this commit. Reviewed-by:
Ying Xue <ying.xue@windriver.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Jon Paul Maloy authored
We move the definition of struct tipc_link from link.h to link.c in order to minimize its exposure to the rest of the code. When needed, we define new functions to make it possible for external entities to access and set data in the link. Apart from the above, there are no functional changes. Reviewed-by:
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Jon Paul Maloy authored
In our effort to have less code and include dependencies between entities such as node, link and bearer, we try to narrow down the exposed interface towards the node as much as possible. In this commit, we move the definition of struct tipc_node, along with many of its associated function declarations, from node.h to node.c. We also move some function definitions from link.c and name_distr.c to node.c, since they access fields in struct tipc_node that should not be externally visible. The moved functions are renamed according to new location, and made static whenever possible. There are no functional changes in this commit. Reviewed-by:
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Jon Paul Maloy authored
According to the node FSM a node in state SELF_UP_PEER_UP cannot change state inside a lock context, except when a TUNNEL_PROTOCOL (SYNCH or FAILOVER) packet arrives. However, the node's individual links may still change state. Since each link now is protected by its own spinlock, we finally have the conditions in place to convert the node spinlock to an rwlock_t. If the node state and arriving packet type are rigth, we can let the link directly receive the packet under protection of its own spinlock and the node lock in read mode. In all other cases we use the node lock in write mode. This enables full concurrent execution between parallel links during steady-state traffic situations, i.e., 99+ % of the time. This commit implements this change. Reviewed-by:
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Jon Paul Maloy authored
As a preparation to allow parallel links to work more independently from each other we introduce a per-link spinlock, to be stored in the struct nodes's link entry area. Since the node lock still is a regular spinlock there is no increase in parallellism at this stage. Reviewed-by:
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Jon Paul Maloy authored
The file name_distr.c currently contains three functions, named_cluster_distribute(), tipc_publ_subcscribe() and tipc_publ_unsubscribe() that all directly access fields in struct tipc_node. We want to eliminate such dependencies, so we move those functions to the file node.c and rename them to tipc_node_broadcast(), tipc_node_subscribe() and tipc_node_unsubscribe() respectively. Reviewed-by:
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Jon Paul Maloy authored
The function tipc_node_check_state() contains the core logics for handling link synchronization and failover. For this reason, it is important to keep it as comprehensible as possible. In this commit, we make three small cleanups. 1) If the node is in state SELF_DOWN_PEER_LEAVING and the received packet confirms that the peer has lost contact, there will be no further action in this function. To make this clearer, we return from the function directly after the state change. 2) Since commit 0f8b8e28 ("tipc: eliminate risk of stalled link synchronization") only the logically first TUNNEL_PROTO/SYNCH packet can alter the link state and set the synch point, independently of arrival order. Hence, there is not any longer any need to adjust the synch value in case such packets arrive in disorder. We remove this adjustment. 3) It is the intention that any message arriving on any of the links may trig a check for and possible termination of a node SYNCH state. A redundant and unnoticed check for tipc_link_is_synching() obviously beats this purpose, with the effect that only packets arriving on the synching link may currently end the synch state. We remove this check. This change will further shorten the synchronization period between parallel links. Reviewed-by:
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Jon Paul Maloy authored
In commit 5cbb28a4 ("tipc: linearize arriving NAME_DISTR and LINK_PROTO buffers") we added linearization of NAME_DISTRIBUTOR, LINK_PROTOCOL/RESET and LINK_PROTOCOL/ACTIVATE to the function tipc_udp_recv(). The location of the change was selected in order to make the commit easily appliable to 'net' and 'stable'. We now move this linearization to where it should be done, in the functions tipc_named_rcv() and tipc_link_proto_rcv() respectively. Reviewed-by:
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David S. Miller authored
Yuval Mintz says: ==================== bnx2x: Statistics patch series This series contains 2 small statistics-related patches, first adding a new SW statistics and the other exposing port stats for multi-function devices. Please consider applying this series to `net-next'. ==================== Signed-off-by: -
Yuval Mintz authored
Today, port statistics are being presented when using `ethool -S' only for single-function devices, but there are some port statistics which are crucial for analyzing bottle-necks. E.g., HW Rx discards due to lack of buffer space [when device isn't handling ingress traffic fast enough]. Judging the pros and cons, it was decided that in-order to better support automatic dump-gathering tools, bnx2x should no longer hide those stats. This leaves only VFs lacking the port statistics. Signed-off-by:
Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by:
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Yuval Mintz authored
Driver already has an internal counter for number of times a given queue had to be stopped due to Tx ring exhaustion. This add the counter to the statistics presented by driver, e.g., by using `ethtool -S'. Signed-off-by:
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David S. Miller authored
Guillaume Nault says: ==================== ppp: Remove PPPOX_ZOMBIE socket state Several issues have been found lately wrt. the PPPOX_ZOMBIE socket state. This state is now only set upon reception of a PADT to stop further transmissions. However this is redundant with the PADT workqueue mechanism introduced by 287f3a94 ("pppoe: Use workqueue to die properly when a PADT is received"). We can thus simplify pppox socket state handling by getting rid of PPPOX_ZOMBIE entirely. ==================== Signed-off-by:
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Guillaume Nault authored
PPPOX_ZOMBIE is never set anymore. Signed-off-by:
Guillaume Nault <g.nault@alphalink.fr> Signed-off-by:
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Guillaume Nault authored
Since 287f3a94 ("pppoe: Use workqueue to die properly when a PADT is received"), pppoe_disc_rcv() disconnects the socket by scheduling pppoe_unbind_sock_work(). This is enough to stop socket transmission and makes the PPPOX_ZOMBIE state uncessary. Signed-off-by:
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David S. Miller authored
Jiri Pirko says: ==================== mlxsw: small driver update Couple of VLAN-related patches. ==================== Signed-off-by: -
Ido Schimmel authored
The operation of adding VLANs on a port via switchdev ops can fail and we need to be prepared for it. If we do not rollback hardware operations following a failure, hardware and software will remain in an inconsistent state. Solve that by adding suitable error paths to __mlxsw_sp_port_vlans_add. Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Ido Schimmel authored
When adding or deleting VLANs from a bridged port, HW VLAN filters must be set accordingly. Instead of having the same code in both add and delete functions, just wrap it in a function and call it with the appropriate parameters. Signed-off-by:
Elad Raz <eladr@mellanox.com> Signed-off-by:
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Ido Schimmel authored
When removing a range of VLANs in which PVID is a member we should use the correct PVID value instead of some VLAN in the range. Also, change two print statements to use 'dev' instead of 'mlxsw_sp_port->dev', as it's already used in other print statements in the function. Signed-off-by:
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Daniel Borkmann authored
Add a handler for show_fdinfo() to be used by the anon-inodes backend for eBPF maps, and dump the map specification there. Not only useful for admins, but also it provides a minimal way to compare specs from ELF vs pinned object. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Jon Ringle authored
When encx24j600 is open and closed many times due to userspace polling the interface, the log gets noise with this log message. Moving this to encx24j600_spi_probe function where it belongs. Signed-off-by:
Jon Ringle <jringle@gridpoint.com> Signed-off-by:
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- 18 Nov, 2015 13 commits
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David S. Miller authored
Eric Dumazet says: ==================== net: extend busy polling support This patch series extends busy polling range to tunnels devices, and adds busy polling generic support to all NAPI drivers. No need to provide ndo_busy_poll() method and extra synchronization between ndo_busy_poll() and normal napi->poll() method. This was proven very difficult and bug prone. mlx5 driver is changed to support busy polling using this new method, and a second mlx5 patch adds napi_complete_done() support and proper SNMP accounting. bnx2x and mlx4 drivers are converted to new infrastructure, reducing kernel bloat and improving performance. Latest patch, adding generic support, adds a new requirement : -free_netdev() and netif_napi_del() must be called from process context. Since this might not be the case in some drivers, we might have to either : fix the non conformant drivers (by disabling busy polling on them) or revert this last patch. ==================== Signed-off-by: -
Eric Dumazet authored
NAPI drivers no longer need to observe a particular protocol to benefit from busy polling (CONFIG_NET_RX_BUSY_POLL=y) napi_hash_add() and napi_hash_del() are automatically called from core networking stack, respectively from netif_napi_add() and netif_napi_del() This patch depends on free_netdev() and netif_napi_del() being called from process context, which seems to be the norm. Drivers might still prefer to call napi_hash_del() on their own, since they might combine all the rcu grace periods into a single one, knowing their NAPI structures lifetime, while core networking stack has no idea of a possible combining. Once this patch proves to not bring serious regressions, we will cleanup drivers to either remove napi_hash_del() or provide appropriate rcu grace periods combining. Signed-off-by:
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Eric Dumazet authored
napi_hash_del() will soon be used from both drivers (if they want) or core networking stack. Callers are responsibles to ensure an RCU grace period is respected before freeing napi structure : napi_hash_del() can signal if this RCU grace period is needed or not. Signed-off-by:
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Eric Dumazet authored
We do not often add/delete a napi context. Moving napi_hash[] into read mostly section avoids potential false sharing. Signed-off-by:
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Eric Dumazet authored
netif_tx_napi_add() is a variant of netif_napi_add() It should be used by drivers that use a napi structure to exclusively poll TX. We do not want to add this kind of napi in napi_hash[] in following patches, adding generic busy polling to all NAPI drivers. Signed-off-by:
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Eric Dumazet authored
We would like to automatically provide busy polling support to all NAPI drivers, without them having to implement anything. skb_mark_napi_id() can be called from napi_gro_receive() and napi_get_frags(). Few drivers are still calling skb_mark_napi_id() because they use netif_receive_skb(). They should eventually call napi_gro_receive() instead. I will leave this to drivers maintainers. Signed-off-by:
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Eric Dumazet authored
Busy polling can now be handled in generic NAPI poll infrastructure. This removes complexity and fast path overhead : mlx4 used two spin_lock()/spin_unlock() pair per napi->poll() call in mlx4_en_cq_lock_napi()/mlx4_en_cq_unlock_napi() Tested: Without busy polling : lpaa23:~# echo 0 >/proc/sys/net/core/busy_read lpaa24:~# echo 0 >/proc/sys/net/core/busy_read lpaa23:~# ./netperf -H lpaa24 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpaa24.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 47330.78 With busy polling : lpaa23:~# echo 70 >/proc/sys/net/core/busy_read lpaa24:~# echo 70 >/proc/sys/net/core/busy_read lpaa23:~# ./netperf -H lpaa24 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpaa24.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 97643.55 Signed-off-by:
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Eric Dumazet authored
Switch to native NAPI polling, as this reduces overhead and complexity. Normal path is faster, since one cmpxchg() is not anymore requested, and busy polling with the NAPI polling has same performance. Tested: lpk50:~# cat /proc/sys/net/core/busy_read 70 lpk50:~# nstat >/dev/null;./netperf -H lpk55 -t TCP_RR;nstat MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpk55.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 40095.07 16384 87380 IpInReceives 401062 0.0 IpInDelivers 401062 0.0 IpOutRequests 401079 0.0 TcpActiveOpens 7 0.0 TcpPassiveOpens 3 0.0 TcpAttemptFails 3 0.0 TcpEstabResets 5 0.0 TcpInSegs 401036 0.0 TcpOutSegs 401052 0.0 TcpOutRsts 38 0.0 UdpInDatagrams 26 0.0 UdpOutDatagrams 27 0.0 Ip6OutNoRoutes 1 0.0 TcpExtDelayedACKs 1 0.0 TcpExtTCPPrequeued 98 0.0 TcpExtTCPDirectCopyFromPrequeue 98 0.0 TcpExtTCPHPHits 4 0.0 TcpExtTCPHPHitsToUser 98 0.0 TcpExtTCPPureAcks 5 0.0 TcpExtTCPHPAcks 101 0.0 TcpExtTCPAbortOnData 6 0.0 TcpExtBusyPollRxPackets 400832 0.0 TcpExtTCPOrigDataSent 400983 0.0 IpExtInOctets 21273867 0.0 IpExtOutOctets 21261254 0.0 IpExtInNoECTPkts 401064 0.0 Signed-off-by:
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Eric Dumazet authored
A NAPI poll handler should return number of RX packets processed, instead of 0 / budget. This allows proper busy poll accounting through LINUX_MIB_BUSYPOLLRXPACKETS SNMP counter. napi_complete_done() allows /sys/class/net/ethX/gro_flush_timeout to be used for finer GRO aggregation control. Tested: Enabled busy polling, and checked TcpExtBusyPollRxPackets counter is increasing. echo 70 >/proc/sys/net/core/busy_read nstat >/dev/null netperf -H target -t TCP_RR >/dev/null nstat | grep TcpExtBusyPollRxPackets TcpExtBusyPollRxPackets 490958 0.0 Signed-off-by:
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Eric Dumazet authored
It is now easy to add busy polling support to a NAPI driver, with very little impact on normal input path. This patch serves as a reference implementation. Note: A followup patch will add proper napi_complete_done() in mlx5, so that LINUX_MIB_BUSYPOLLRXPACKETS snmp counter is properly handled. Tested: Normal TCP_RR results without busy polling : lpk51:~# echo 0 >/proc/sys/net/core/busy_read lpk52:~# echo 0 >/proc/sys/net/core/busy_read lpk51:~# ./netperf -H 192.168.4.52 -t TCP_RR -l 10 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.4.52 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 53509.49 16384 87380 Now enable busy polling : lpk51:~# echo 70 >/proc/sys/net/core/busy_read lpk52:~# echo 70 >/proc/sys/net/core/busy_read lpk51:~# ./netperf -H 192.168.4.52 -t TCP_RR -l 10 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.4.52 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 97530.92 16384 87380 Signed-off-by:
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Eric Dumazet authored
Instead of having to implement complex ndo_busy_poll() method, drivers can simply rely on NAPI poll logic. Busy polling gains are mainly coming from polling itself, not on exact details on how we poll the device. ndo_busy_poll() if implemented can avoid touching napi state, but it adds extra synchronization between normal napi->poll() and busy poll handler, slowing down the common path (non busy polling) with extra atomic operations. In practice few drivers ever got busy poll because of the complexity. We could go one step further, and make busy polling available for all NAPI drivers, but this would require that all netif_napi_del() calls are done in process context so that we can call synchronize_rcu(). Full audit would be required. Before this is done, a driver still needs to call : - skb_mark_napi_id() for each skb provided to the stack. - napi_hash_add() and napi_hash_del() to allocate a napi_id per napi struct. - Make sure RCU grace period is respected after napi_hash_del() before memory containing napi structure is freed. Followup patch implements busy poll for mlx5 driver as an example. Signed-off-by:
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Eric Dumazet authored
Instead of blocking BH in whole sk_busy_loop(), block them only around ->ndo_busy_poll() calls. This has many benefits. 1) allow tunneled traffic to use busy poll as well as native traffic. Tunnels handlers usually call netif_rx() and depend on net_rx_action() being run (from sofirq handler) 2) allow RFS/RPS being used (sending IPI to other cpus if needed) 3) use the 'lets burn cpu cycles' budget to do useful work (like TX completions, timers, RCU callbacks...) 4) reduce BH latencies, making busy poll a better citizen. Tested: Tested with SIT tunnel lpaa5:~# echo 0 >/proc/sys/net/core/busy_read lpaa5:~# ./netperf -H 2002:af6:786::1 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from ::0 (::) port 0 AF_INET6 to 2002:af6:786::1 () port 0 AF_INET6 : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 37373.93 16384 87380 Now enable busy poll on both hosts lpaa5:~# echo 70 >/proc/sys/net/core/busy_read lpaa6:~# echo 70 >/proc/sys/net/core/busy_read lpaa5:~# ./netperf -H 2002:af6:786::1 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from ::0 (::) port 0 AF_INET6 to 2002:af6:786::1 () port 0 AF_INET6 : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 58314.77 16384 87380 Signed-off-by:
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Eric Dumazet authored
There is really little gain from inlining this big function. We'll soon make it even bigger in following patches. This means we no longer need to export napi_by_id() Signed-off-by:
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