- 05 Feb, 2015 40 commits
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Markus Elfring authored
The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Takashi Iwai authored
Instead of manual calls of device_create_file() and device_remove_files(), assign the static attribute groups to netdev groups array. This simplifies the code and avoids the possible races. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Acked-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Takashi Iwai authored
Instead of manual calls of device_create_file() and device_remove_files(), assign the static attribute groups to netdev groups array. This simplifies the code and avoids the possible races. Signed-off-by:
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Markus Elfring authored
The functions kfree() and vfree() perform also input parameter validation. Thus the test around their calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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David S. Miller authored
Merge tag 'linux-can-next-for-3.20-20150204' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next Marc Kleine-Budde says: ==================== pull-request: can-next 2015-02-04 this is a pull request of 2 patches for net-next/master. Nicholas Mc Guire contributes a patch for the janz-ican3 driver to fix a mismatch in an assignment. Ahmed S. Darwish contributes a patch for the kvaser_usb driver, to make the driver more robust during the bus-off handling. ==================== Signed-off-by:
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Lad, Prabhakar authored
this patch fixes following sparse warning: cpsw-common.c:23:5: warning: symbol 'cpsw_am33xx_cm_get_macid' was not declared. Should it be static? Signed-off-by:
Lad, Prabhakar <prabhakar.csengg@gmail.com> Signed-off-by:
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Markus Elfring authored
The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
The release_firmware() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Hariprasad Shenai authored
cxgb_busy_poll, corresponding to ndo_busy_poll, gets called by the socket waiting for data. With busy_poll enabled, improvement is seen in latency numbers as observed by collecting netperf TCP_RR numbers. Below are latency number, with and without busy-poll, in a switched environment for a particular msg size: netperf command: netperf -4 -H <ip> -l 30 -t TCP_RR -- -r1,1 Latency without busy-poll: ~16.25 us Latency with busy-poll : ~08.79 us Based on original work by Kumar Sanghvi <kumaras@chelsio.com> Signed-off-by:
Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by:
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David S. Miller authored
Revert "bridge: Let bridge not age 'externally' learnt FDB entries, they are removed when 'external' entity notifies the aging" This reverts commit 9a05dde5. Requested by Scott Feldman. Signed-off-by:
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Eric Dumazet authored
FQ has a fast path for skb attached to a socket, as it does not have to compute a flow hash. But for other packets, FQ being non stochastic means that hosts exposed to random Internet traffic can allocate million of flows structure (104 bytes each) pretty easily. Not only host can OOM, but lookup in RB trees can take too much cpu and memory resources. This patch adds a new attribute, orphan_mask, that is adding possibility of having a stochastic hash for orphaned skb. Its default value is 1024 slots, to mimic SFQ behavior. Note: This does not apply to locally generated TCP traffic, and no locally generated traffic will share a flow structure with another perfect or stochastic flow. This patch also handles the specific case of SYNACK messages: They are attached to the listener socket, and therefore all map to a single hash bucket. If listener have set SO_MAX_PACING_RATE, hoping to have new accepted socket inherit this rate, SYNACK might be paced and even dropped. This is very similar to an internal patch Google have used more than one year. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsDavid S. Miller authored
More iov_iter work from Al Viro. Signed-off-by: -
Eric Dumazet authored
When we added pacing to TCP, we decided to let sch_fq take care of actual pacing. All TCP had to do was to compute sk->pacing_rate using simple formula: sk->pacing_rate = 2 * cwnd * mss / rtt It works well for senders (bulk flows), but not very well for receivers or even RPC : cwnd on the receiver can be less than 10, rtt can be around 100ms, so we can end up pacing ACK packets, slowing down the sender. Really, only the sender should pace, according to its own logic. Instead of adding a new bit in skb, or call yet another flow dissection, we tweak skb->truesize to a small value (2), and we instruct sch_fq to use new helper and not pace pure ack. Note this also helps TCP small queue, as ack packets present in qdisc/NIC do not prevent sending a data packet (RPC workload) This helps to reduce tx completion overhead, ack packets can use regular sock_wfree() instead of tcp_wfree() which is a bit more expensive. This has no impact in the case packets are sent to loopback interface, as we do not coalesce ack packets (were we would detect skb->truesize lie) In case netem (with a delay) is used, skb_orphan_partial() also sets skb->truesize to 1. This patch is a combination of two patches we used for about one year at Google. Signed-off-by:
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David S. Miller authored
Herbert Xu says: ==================== rhashtable: Add iterators and use them The first patch fixes a potential crash with nft_hash destroying the table during a shrinking process. While the next patch adds rhashtable iterators to replace current manual walks used by netlink and netfilter. The final two patches make use of these iterators in netlink and netfilter. ==================== Signed-off-by: -
Herbert Xu authored
This patch gets rid of the manual rhashtable walk in nft_hash which touches rhashtable internals that should not be exposed. It does so by using the rhashtable iterator primitives. Note that I'm leaving nft_hash_destroy alone since it's only invoked on shutdown and it shouldn't be affected by changes to rhashtable internals (or at least not what I'm planning to change). Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Herbert Xu authored
This patch gets rid of the manual rhashtable walk in netlink which touches rhashtable internals that should not be exposed. It does so by using the rhashtable iterator primitives. In fact the existing code was very buggy. Some sockets weren't shown at all while others were shown more than once. Signed-off-by:
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Herbert Xu authored
Some existing rhashtable users get too intimate with it by walking the buckets directly. This prevents us from easily changing the internals of rhashtable. This patch adds the helpers rhashtable_walk_init/exit/start/next/stop which will replace these custom walkers. They are meant to be usable for both procfs seq_file walks as well as walking by a netlink dump. The iterator structure should fit inside a netlink dump cb structure, with at least one element to spare. Signed-off-by:
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Herbert Xu authored
The current being_destroyed check in rhashtable_expand is not enough since if we start a shrinking process after freeing all elements in the table that's also going to crash. This patch adds a being_destroyed check to the deferred worker thread so that we bail out as soon as we take the lock. Signed-off-by:
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Markus Elfring authored
The functions cpsw_ale_destroy() and of_dev_put() test whether their argument is NULL and then return immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
The of_dev_put() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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David S. Miller authored
Amir Vadai says: ==================== Mellanox drivers updates Feb-03-2015 This patchset introduces some small bug fixes and code cleanups in mlx4_core, mlx4_en and mlx5_core. I am sending it in parallel to the patchset sent by Or Gerlitz today [1] because this is the end of the time frame for 3.20. I also checked that there are no conflicts between those two patchsets (Or's patchset is focused on the bonding area while this on Mellanox drivers). The patchset was applied on top of commit 7d37d0c1 ('net: sctp: Deletion of an unnecessary check before the function call "kfree"') [1] - [PATCH 00/10] Add HA and LAG support to mlx4 RoCE and SRIOV services http://marc.info/?l=linux-netdev&m=142297582610254&w=2 ==================== Signed-off-by:
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Ido Shamay authored
Notify users when TX vlan offload feature changed with ethtool. Relevant command - ethtool -K <eth> txvlan on/off. 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
This patch improves memory utilization and therefore the packets rate for special MTU's. Instead of setting the frag_stride to the maximal hard coded frag_size, use the actual frag_size that is set according to the MTU, when setting the stride of the last frag. So, for example, for MTU 1600, where the frag_size of the 2nd frag is 86, the frag_size is set to 128 instead of 4096. See below: Before: frag:0 - size:1536 prefix:0 stride:1536 frag:1 - size:86 prefix:1536 stride:4096 frag 0 allocator: - size:32768 frags:21 frag 1 allocator: - size:32768 frags:8 After: frag:0 - size:1536 prefix:0 stride:1536 frag:1 - size:86 prefix:1536 stride:128 frag 0 allocator: - size:32768 frags:21 frag 1 allocator: - size:32768 frags:256 Signed-off-by:
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Ido Shamay authored
After Initialization of page_alloc, print actual allocated page size and number of frags it contains. prints is done only when drv message level is set on the interface. Signed-off-by:
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Or Gerlitz authored
Align the IDs in the code with the modinfo, lspci -n, etc tools outputs. Signed-off-by:
Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by:
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Or Gerlitz authored
We do support cache line sizes of 32 and 64 bytes without activating the CQE stride feature. Fix a misleading print saying that these cache line sizes aren't supported. Signed-off-by:
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Maor Gottlieb authored
Add Initialization to struct config_dev before filling and using it. Fix to warning: warning: config_dev.rx_checksum_val may be used uninitialized in this function Signed-off-by:
Maor Gottlieb <maorg@mellanox.com> Signed-off-by:
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Maor Gottlieb authored
a) Previously, mlx4_mr_rereg_write filled the MPT's start and length with the old MPT's values. Fixing the initialization to take the new start and length. b) In addition access flags in mpt_status were initialized instead of status due to bad boolean operation. Fixing the operation. c) Initialization of pd_slave caused a protection error. Fix - removing this initialization. d) In resource_tracker.c: Fixing vf encoding to be one-based. Fixes: e630664c ('mlx4_core: Add helper functions to support MR re-registration') Signed-off-by:
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David S. Miller authored
Or Gerlitz says: ==================== Add HA and LAG support to mlx4 RoCE and SRIOV services This series takes advanges of bonding mlx4 Ethernet devices to support a model of High-Availability and Link Aggregation for more environments. The mlx4 driver reacts on netdev events generated by bonding when slave state changes happen by programming a HW V2P (Virt-to-Phys) port table. Bonding was extended to expose these state changes through netdev events. When an mlx4 interface such as the mlx4 IB/RoCE driver is subject to this policy, QPs are created over virtual ports which are mapped to one of the two physical ports. When a failure happens, the re-programming of the V2P table allows traffic to keep flowing. The mlx4 Ethernet driver interfaces are not subject to this policy and act as usual. A 2nd use-case for this model would be to add HA and Link Aggregation support to single ported mlx4 Ethernet VFs. In this case, the PF Ethernet intrfaces are bonded, all the VFs see single port devices (which is supported already today), and VF QPs are subject to V2P. ==================== Signed-off-by: -
Moni Shoua authored
When the mlx4 IB (RoCE) device works in link aggregation mode, it exposes a single port to upper layers. Therefore, applications always set '1' in port_num attribute when modifying a QP or creating an address handle. To make sure that a node uses all available ports the mlx4 driver will override the port_num attribute with a round robin policy. Signed-off-by:
Moni Shoua <monis@mellanox.com> Signed-off-by:
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Moni Shoua authored
In port aggregation mode flows for port #1 (the only port) should be mirrored on port #2. This is because packets can arrive from either physical ports. Signed-off-by:
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Moni Shoua authored
Register the interface with the mlx4 core driver with port aggregation support and check for port aggregation mode when the 'add' function is called. In this mode, only one physical port is reported to the upper layer (RoCE/IB core stack and ULPs). Signed-off-by:
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Moni Shoua authored
This function is implemented twice... get rid of one copy. Signed-off-by:
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Moni Shoua authored
Capture NETDEV events generated by the bonding driver and based on that make decisions of how to configure port aggregation in the mlx4 core driver. This includes setting the V2P port table and re-creating the interested interfaces in bonded/non-bonded mode. Signed-off-by:
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Moni Shoua authored
Supply interface functions to bond and unbond ports of a mlx4 internal interfaces. Example for such an interface is the one registered by the mlx4 IB driver under RoCE. There are 1. Functions to go in/out to/from bonded mode 2. Function to remap virtual ports to physical ports The bond_mutex prevents simultaneous access to data that keep status of the device in bonded mode. The upper mlx4 interface marks to the mlx4 core module that they want to be subject for such bonding by setting the MLX4_INTFF_BONDING flag. Interface which goes to/from bonded mode is re-created. The mlx4 Ethernet driver does not set this flag when registering the interface, the IB driver does. Signed-off-by:
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Moni Shoua authored
Implement the hardware interface required for port aggregation. 1. Disable RX port check on receive - don't perform a validity check that matches to QP's port and the port where the packet is received. 2. Virtual to physical port remap - configure virtual to physical port mapping. Port remap capability for virtual functions. Signed-off-by:
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Moni Shoua authored
Use notifier chain to dispatch an event upon a change in slave state. Event is dispatched with slave specific info. Signed-off-by:
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Moni Shoua authored
Move slave state changes to a helper function, this is a pre-step for adding functionality of dispatching an event when this helper is called. This commit doesn't add new functionality. Signed-off-by:
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