- 21 Nov, 2016 22 commits
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David S. Miller authored
Florian Westphal says: ==================== tcp: make undo_cwnd mandatory for congestion modules highspeed, illinois, scalable, veno and yeah congestion control algorithms don't provide a 'cwnd_undo' function. This makes the stack default to a 'reno undo' which doubles cwnd. However, the ssthresh implementation of these algorithms do not halve the slowstart threshold. This causes similar issue as the one fixed for dctcp in ce6dd233 ("dctcp: avoid bogus doubling of cwnd after loss"). In light of this it seems better to remove the fallback and make undo_cwnd mandatory. First patch fixes those spots where reno undo seems incorrect by providing .cwnd_undo functions, second patch removes the fallback. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Florian Westphal authored
The undo_cwnd fallback in the stack doubles cwnd based on ssthresh, which un-does reno halving behaviour. It seems more appropriate to let congctl algorithms pair .ssthresh and .undo_cwnd properly. Add a 'tcp_reno_undo_cwnd' function and wire it up for all congestion algorithms that used to rely on the fallback. Cc: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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Florian Westphal authored
congestion control algorithms that do not halve cwnd in their .ssthresh should provide a .cwnd_undo rather than rely on current fallback which assumes reno halving (and thus doubles the cwnd). All of these do 'something else' in their .ssthresh implementation, thus store the cwnd on loss and provide .undo_cwnd to restore it again. A followup patch will remove the fallback and all algorithms will need to provide a .cwnd_undo function. Signed-off-by:
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David S. Miller authored
Nikolay Aleksandrov says: ==================== bridge: add support for IGMPv3 and MLDv2 querier This patch-set adds support for IGMPv3 and MLDv2 querier in the bridge. Two new options which can be toggled via netlink and sysfs are added that control the version per-bridge: multicast_igmp_version - default 2, can be set to 3 multicast_mld_version - default 1, can be set to 2 (this option is disabled if CONFIG_IPV6=n) Note that the names do not include "querier", I think that these options can be re-used later as more IGMPv3 support is added to the bridge so we can avoid adding more options to switch between v2 and v3 behaviour. The set uses the already existing br_ip{4,6}_multicast_alloc_query functions and adds the appropriate header based on the chosen version. For the initial support I have removed the compatibility implementation (RFC3376 sec 7.3.1, 7.3.2; RFC3810 sec 8.3.1, 8.3.2), because there are some details that we need to sort out. ==================== Signed-off-by: -
Nikolay Aleksandrov authored
This patch adds basic support for MLDv2 queries, the default is MLDv1 as before. A new multicast option - multicast_mld_version, adds the ability to change it between 1 and 2 via netlink and sysfs. The MLD option is disabled if CONFIG_IPV6 is disabled. Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Nikolay Aleksandrov authored
This patch adds basic support for IGMPv3 queries, the default is IGMPv2 as before. A new multicast option - multicast_igmp_version, adds the ability to change it between 2 and 3 via netlink and sysfs. The option struct member is in a 4 byte hole in net_bridge. There also a few minor style adjustments in br_multicast_new_group and br_multicast_add_group. Signed-off-by:
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Gao Feng authored
The function macvlan_forward_source_one has already checked the flag IFF_UP, so needn't check it outside in macvlan_forward_source too. Signed-off-by:
Gao Feng <gfree.wind@gmail.com> Signed-off-by:
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Eric Dumazet authored
While stressing a 40Gbit mlx4 NIC with busy polling, I found false sharing in mlx4 driver that can be easily avoided. This patch brings an additional 7 % performance improvement in UDP_RR workload. 1) If we received no frame during one mlx4_en_process_rx_cq() invocation, no need to call mlx4_cq_set_ci() and/or dirty ring->cons 2) Do not refill rx buffers if we have plenty of them. This avoids false sharing and allows some bulk/batch optimizations. Page allocator and its locks will thank us. Finally, mlx4_en_poll_rx_cq() should not return 0 if it determined cpu handling NIC IRQ should be changed. We should return budget-1 instead, to not fool net_rx_action() and its netdev_budget. v2: keep AVG_PERF_COUNTER(... polled) even if polled is 0 Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Tariq Toukan <tariqt@mellanox.com> Reviewed-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Eric Dumazet authored
barrier() is a big hammer compared to READ_ONCE(), and requires comments explaining what is protected. READ_ONCE() is more precise and compiler should generate better overall code. Signed-off-by:
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Eric Dumazet authored
UDP_SKB_CB(skb)->partial_cov is located at offset 66 in skb, requesting a cold cache line being read in cpu cache. We can avoid this cache line miss for UDP sockets, as partial_cov has a meaning only for UDPLite. Signed-off-by:
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David S. Miller authored
Daniel Borkmann says: ==================== Couple of BPF refcount fixes for mlx5 Various mlx5 bugs on eBPF refcount handling found during review. Last patch in series adds a __must_check to BPF helpers to make sure we won't run into it again w/o compiler complaining first. v2 -> v3: - Just reworked patch 2/4 so we don't need bpf_prog_sub(). - Rebased, rest as is. v1 -> v2: - After discussion with Alexei, we agreed upon rebasing the patches against net-next. - Since net-next, I've also added the __must_check to enforce future users to check for errors. - Fixed up commit message #2. - Simplify assignment from patch #1 based on Saeed's feedback on previous set. ==================== Signed-off-by: -
Daniel Borkmann authored
Helpers like bpf_prog_add(), bpf_prog_inc(), bpf_map_inc() can fail with an error, so make sure the caller properly checks their return value and not just ignores it, which could worst-case lead to use after free. Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Daniel Borkmann authored
mlx5e_xdp_set() is currently the only place where we drop reference on the prog sitting in priv->xdp_prog when it's exchanged by a new one. We also need to make sure that we eventually release that reference, for example, in case the netdev is dismantled, otherwise we leak the program. Fixes: 86994156 ("net/mlx5e: XDP fast RX drop bpf programs support") Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
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Daniel Borkmann authored
There are multiple issues in mlx5e_xdp_set(): 1) The batched bpf_prog_add() is currently not checked for errors. When doing so, it should be done at an earlier point in time to makes sure that we cannot fail anymore at the time we want to set the program for each channel. The batched refs short-cut can only be performed when we don't need to perform a reset for changing the rq type and the device was in opened state. In case the device was not in opened state, then the next mlx5e_open_locked() will aquire the refs from the control prog via mlx5e_create_rq(), same when we need to perform a reset. 2) When swapping the priv->xdp_prog, then no extra reference count must be taken since we got that from call path via dev_change_xdp_fd() already. Otherwise, we'd never be able to release the program. Also, bpf_prog_add() without checking the return code could fail. Fixes: 86994156 ("net/mlx5e: XDP fast RX drop bpf programs support") Signed-off-by:
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Daniel Borkmann authored
In mlx5e_create_rq(), when creating a new queue, we call bpf_prog_add() but without checking the return value. bpf_prog_add() can fail since 92117d84 ("bpf: fix refcnt overflow"), so we really must check it. Take the reference right when we assign it to the rq from priv->xdp_prog, and just drop the reference on error path. Destruction in mlx5e_destroy_rq() looks good, though. Fixes: 86994156 ("net/mlx5e: XDP fast RX drop bpf programs support") Signed-off-by:
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David S. Miller authored
Andrew Lunn says: ==================== Fixes for the MV88e6xxx interrupt code The interrupt code was never tested with a board who's probing resulted in an -EPROBE_DEFFERED. So the clean up paths never got tested. I now do have -EPROBE_DEFFERED, and things break badly during cleanup. These are the fixes. This is fixing code in net-next. v2: Fix typo pointed out by David Miller ==================== Signed-off-by: -
Andrew Lunn authored
Freeing interrupts requires switch register access to mask the interrupts. Hence we must hold the register mutex. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
It is not possible to use devm_request_threaded_irq() because we have two stacked interrupt controllers in one device. The lower interrupt controller cannot be removed until the upper is fully removed. This happens too late with the devm API, resulting in error messages about removing a domain while there is still an active interrupt. Swap to using request_threaded_irq() and manage the release of the interrupt manually. Signed-off-by:
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Andrew Lunn authored
On error, remask the interrupts, release all maps, and remove the domain. This cannot be done using the mv88e6xxx_g1_irq_free() because some of these actions are not idempotent. Signed-off-by:
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Andrew Lunn authored
Fix the g1 interrupt free code such that is masks any further interrupts, and then releases the interrupt. Signed-off-by:
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Andrew Lunn authored
Trying to remove an IRQ domain that was not created results in an Opps. Add the necessary checks that the irqs were created before freeing them. Signed-off-by:
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Andrew Lunn authored
Simple typos, s/g2/g1/ Signed-off-by:
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- 20 Nov, 2016 4 commits
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Alexey Dobriyan authored
1) cast to "int" is unnecessary: u8 will be promoted to int before decrementing, small positive numbers fit into "int", so their values won't be changed during promotion. Once everything is int including loop counters, signedness doesn't matter: 32-bit operations will stay 32-bit operations. But! Someone tried to make this loop smart by making everything of the same type apparently in an attempt to optimise it. Do the optimization, just differently. Do the cast where it matters. :^) 2) frag size is unsigned entity and sum of fragments sizes is also unsigned. Make everything unsigned, leave no MOVSX instruction behind. add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-4 (-4) function old new delta skb_cow_data 835 834 -1 ip_do_fragment 2549 2548 -1 ip6_fragment 3130 3128 -2 Total: Before=154865032, After=154865028, chg -0.00% Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Alexey Dobriyan authored
Length of a netlink attribute may be u16 but lengths of basic attributes are much smaller, so small we can save 16 bytes of .rodata and pocket change inside .text. 16-bit is worse on x86-64 than 8-bit because of operand size override prefix. add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-19 (-19) function old new delta validate_nla 418 417 -1 nla_policy_len 66 64 -2 nla_attr_minlen 32 16 -16 Total: Before=154865051, After=154865032, chg -0.00% Signed-off-by:
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Alexey Dobriyan authored
->nla_len is unsigned entity (it's length after all) and u16, thus it can't overflow when being aligned into int/unsigned int. (nlmsg_next has the same code, but I didn't yet convince myself it is correct to do so). There is pointer arithmetic in this function and offset being unsigned is better: add/remove: 0/0 grow/shrink: 1/64 up/down: 5/-309 (-304) function old new delta nl80211_set_wiphy 1444 1449 +5 team_nl_cmd_options_set 997 995 -2 tcf_em_tree_validate 872 870 -2 switchdev_port_bridge_setlink 352 350 -2 switchdev_port_br_afspec 312 310 -2 rtm_to_fib_config 428 426 -2 qla4xxx_sysfs_ddb_set_param 2193 2191 -2 qla4xxx_iface_set_param 4470 4468 -2 ovs_nla_free_flow_actions 152 150 -2 output_userspace 518 516 -2 ... nl80211_set_reg 654 649 -5 validate_scan_freqs 148 142 -6 validate_linkmsg 288 282 -6 nl80211_parse_connkeys 489 483 -6 nlattr_set 231 224 -7 nf_tables_delsetelem 267 260 -7 do_setlink 3416 3408 -8 netlbl_cipsov4_add_std 1672 1659 -13 nl80211_parse_sched_scan 2902 2888 -14 nl80211_trigger_scan 1738 1720 -18 do_execute_actions 2821 2738 -83 Total: Before=154865355, After=154865051, chg -0.00% Signed-off-by:
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Alexey Dobriyan authored
size_t is way too much for an integer not exceeding 64. Space savings: 10 bytes! add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-10 (-10) function old new delta napi_consume_skb 165 163 -2 __kfree_skb_flush 56 53 -3 __kfree_skb_defer 97 92 -5 Total: Before=154865639, After=154865629, chg -0.00% Signed-off-by:
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- 19 Nov, 2016 6 commits
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git://git.open-mesh.org/linux-mergeDavid S. Miller authored
Simon Wunderlich says: ==================== This feature patchset includes the following changes: - 6 patches adding functionality to detect a WiFi interface under other virtual interfaces, like VLANs. They introduce a cache for the detected the WiFi configuration to avoid RTNL locking in critical sections. Patches have been prepared by Marek Lindner and Sven Eckelmann - Enable automatic module loading for genl requests, by Sven Eckelmann - Fix a potential race condition on interface removal. This is not happening very often in practice, but requires bigger changes to fix, so we are sending this to net-next. By Linus Luessing ==================== Signed-off-by: -
Jarno Rajahalme authored
Remove static function __packet_rcv_vnet(), which only called virtio_net_hdr_from_skb() and BUG()ged out if an error code was returned. Instead, call virtio_net_hdr_from_skb() from the former call sites of __packet_rcv_vnet() and actually use the error handling code that is already there. Signed-off-by:
Jarno Rajahalme <jarno@ovn.org> Signed-off-by:
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Jarno Rajahalme authored
Use the common virtio_net_hdr_to_skb() instead of open coding it. Other call sites were changed by commit fd2a0437, but this one was missed, maybe because it is split in two parts of the source code. Interim comparisons of 'vnet_hdr->gso_type' still work as both the vnet_hdr and skb notion of gso_type is zero when there is no gso. Fixes: fd2a0437 ("virtio_net: introduce virtio_net_hdr_{from,to}_skb") Signed-off-by:
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Jarno Rajahalme authored
virtio_net_hdr_from_skb() clears the memory for the header, so there is no point for the callers to do the same. Signed-off-by:
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Jarno Rajahalme authored
Fix incorrent comment after the final #endif. Signed-off-by:
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Jarno Rajahalme authored
No point storing the return value of virtio_net_hdr_to_skb() or virtio_net_hdr_from_skb() to a variable when the value is used only once as a boolean in an immediately following if statement. Signed-off-by:
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- 18 Nov, 2016 8 commits
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Hariprasad Shenai authored
Allocate resources dynamically for Upper layer driver's (ULD) like cxgbit, iw_cxgb4, cxgb4i and chcr. The resources allocated include Tx queues which are allocated when ULD register with cxgb4 driver and freed while un-registering. The Tx queues which are shared by ULD shall be allocated by first registering driver and un-allocated by last unregistering driver. Signed-off-by:
Atul Gupta <atul.gupta@chelsio.com> Signed-off-by:
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Dan Carpenter authored
We obviously intended a bitwise AND here, not a logical one. Fixes: 8c978d05 ("liquidio CN23XX: Mailbox support") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Woojung Huh authored
Relocate mdix code to phy driver to be called at config_init(). Signed-off-by:
Woojung Huh <woojung.huh@microchip.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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David S. Miller authored
Florian Fainelli says: ==================== net: Enable COMPILE_TEST for Marvell & Freescale drivers This patch series allows building the Freescale and Marvell Ethernet network drivers with COMPILE_TEST. Changes in v4: - add proper HAS_DMA to fix build errors on m32r - provide an inline stub for mvebu_mbus_get_dram_win_info - added an additional patch to fix build errors with mv88e6xxx on m32r Changes in v3: - reorder patches to avoid introducing a build warning between commits Changes in v2: - rename register define clash when building for i386 (spotted by LKP) ==================== Signed-off-by: -
Florian Fainelli authored
Some architectures may not define IRQ_DOMAIN (like m32r), fixes undefined references to IRQ_DOMAIN functions. Fixes: dc30c35b ("net: dsa: mv88e6xxx: Implement interrupt support.") Signed-off-by:
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Florian Fainelli authored
All Marvell Ethernet drivers actually build fine with COMPILE_TEST with a few warnings. We need to add a few HAS_DMA dependencies to fix linking failures on problematic architectures like m32r. Signed-off-by:
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Florian Fainelli authored
In preparation for allowing CONFIG_MVNETA_BM to build with COMPILE_TEST, provide an inline stub for mvebu_mbus_get_dram_win_info(). Signed-off-by:
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Florian Fainelli authored
There are only a handful of Freescale Ethernet drivers that don't actually build with COMPILE_TEST: * FEC, for which we would need to define a default register layout if no supported architecture is defined * UCC_GETH which depends on PowerPC cpm.h header (which could be moved to a generic location) * GIANFAR needs to depend on HAS_DMA to fix linking failures on some architectures (like m32r) We need to fix an unmet dependency to get there though: warning: (FSL_XGMAC_MDIO) selects OF_MDIO which has unmet direct dependencies (OF && PHYLIB) which would result in CONFIG_OF_MDIO=[ym] without CONFIG_OF to be set. Signed-off-by:
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