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By removing the PCI device reference from the structure and passing it
as parameters to the interested functions, we can make quark_pci_info
const.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When the VF NIC is opened, the synthetic NIC's carrier state is set to
off. This tells the host to transitions data path to the VF device. But
if startup script or user manipulates the admin state of the netvsc
device directly for example:
# ifconfig eth0 down
# ifconfig eth0 up
Then the carrier state of the synthetic NIC would be on, even though the
data path was still over the VF NIC. This patch sets the carrier state
of synthetic NIC with consideration of the related VF state.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We simply use rndis_device->link_state in the netdev_dbg. The variable,
link_state from struct netvsc_device_info, is not used anywhere else.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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tracex5_kern.c build failed with the following error message:
../samples/bpf/tracex5_kern.c:12:10: fatal error: 'syscall_nrs.h' file not found
#include "syscall_nrs.h"
The generated file syscall_nrs.h is put in build/samples/bpf directory,
but this directory is not in include path, hence build failed.
The fix is to add $(obj) into the clang compilation path.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Sowmini Varadhan says:
====================
rds: tcp: fixes
Patch1 is a bug fix for correct reconnect when a connection
is restarted. Patch 2 accelerates cleanup by setting linger
to 1 and sending a RST to the peer.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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If we are unloading the rds_tcp module, we can set linger to 1
and drop pending packets to accelerate reconnect. The peer will
end up resetting the connection based on new generation numbers
of the new incarnation, so hanging on to unsent TCP packets via
linger is mostly pointless in this case.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Tested-by: Jenny Xu <jenny.x.xu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The RDS handshake ping probe added by commit 5916e2c1554f
("RDS: TCP: Enable multipath RDS for TCP") is sent from rds_sendmsg()
before the first data packet is sent to a peer. If the conversation
is not bidirectional (i.e., one side is always passive and never
invokes rds_sendmsg()) and the passive side restarts its rds_tcp
module, a new HS ping probe needs to be sent, so that the number
of paths can be re-established.
This patch achieves that by sending a HS ping probe from
rds_tcp_accept_one() when c_npaths is 0 (i.e., we have not done
a handshake probe with this peer yet).
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Tested-by: Jenny Xu <jenny.x.xu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The update to ibmvnic_init to allow an EAGAIN return code broke
the calling of ibmvnic_init from ibmvnic_probe. The code now
will return from this point in the probe routine if anything
other than EAGAIN is returned. The check should be to see if rc
is non-zero and not equal to EAGAIN.
Without this fix, the vNIC driver can return 0 (success) from
its probe routine due to ibmvnic_init returning zero, but before
completing the probe process and registering with the netdev layer.
Fixes: 6a2fb0e99f9c (ibmvnic: driver initialization for kdump/kexec)
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Thomas Falcon says:
====================
ibmvnic: Correct long-term-mapped buffer error handling
This patch set fixes the error-handling of long-term-mapped buffers
during adapter initialization and reset. The first patch fixes a bug
in an incorrectly defined descriptor that was keeping the return
codes from the VIO server from being properly checked. The second patch
fixes and cleans up the error-handling implementation.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The patch stores the return code of the REQUEST_MAP_RSP sub-CRQ command
in the private data structure, where it can be later checked during
device open or a reset.
In the case of a reset, the mapping request to the vNIC Server may fail,
especially in the case of a partition migration. The driver attempts to
handle this by re-allocating the buffer and re-sending the mapping request.
The original error handling implementation was removed. The separate
function handling the REQUEST_MAP response message was also removed,
since it is now simple enough to be handled in the ibmvnic_handle_crq
function.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reserved area should be eight bytes in length instead of four.
As a result, the return codes in the REQUEST_MAP_RSP descriptors
were not being properly handled.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently in both ipv4 and ipv6 code path, the ack packet received when
sk at TCP_NEW_SYN_RECV state is not filtered by socket filter or cgroup
filter since it is handled from tcp_child_process and never reaches the
tcp_filter inside tcp_v4_rcv or tcp_v6_rcv. Adding a tcp_filter hooks
here can make sure all the ingress tcp packet can be correctly filtered.
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The memcpy annotation triggers for a fixed-length buffer copy:
In file included from /git/arm-soc/arch/arm64/include/asm/processor.h:30:0,
from /git/arm-soc/arch/arm64/include/asm/spinlock.h:21,
from /git/arm-soc/include/linux/spinlock.h:87,
from /git/arm-soc/include/linux/seqlock.h:35,
from /git/arm-soc/include/linux/time.h:5,
from /git/arm-soc/include/linux/stat.h:21,
from /git/arm-soc/include/linux/module.h:10,
from /git/arm-soc/drivers/net/phy/smsc.c:20:
In function 'memcpy',
inlined from 'smsc_get_strings' at /git/arm-soc/drivers/net/phy/smsc.c:166:3:
/git/arm-soc/include/linux/string.h:309:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter
Using strncpy instead of memcpy should do the right thing here.
Fixes: 030a89028db0 ("net: phy: smsc: Implement PHY statistics")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use Mellanox device ID definitions in the driver's mlx5 ID table so tools
such as 'grep' and 'cscope' can be used to help find correlated material
(such as INTx Masking quirks: d76d2fe05fd PCI: Convert Mellanox broken
INTx quirks to be for listed devices only).
No functional change intended.
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Only compile-tested - I don't have the hardware.
>From code inspection, octeon_pci_write_core_mem() appears to be safe wrt
unaligned source. In any case, u8 fbuf[] was not guaranteed to be aligned
anyway.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Felix Manlunas <felix.manlunas@cavium.com>
CC: Prasad Kanneganti <prasad.kanneganti@cavium.com>
CC: Derek Chickles <derek.chickles@cavium.com>
CC: David Miller <davem@davemloft.net>
CC: netdev@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Acked-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ath.git patches for 4.13. Major changes:
wil6210
* add low level RF sector interface via nl80211 vendor commands
* add module parameter ftm_mode to load separate firmware for factory
testing
* support devices with different PCIe bar size
* add support for PCIe D3hot in system suspend
* remove ioctl interface which should not be in a wireless driver
ath10k
* go back to using dma_alloc_coherent() for firmware scratch memory
* add per chain RSSI reporting
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The offending commit pushed fwd the field by two bits but
didn't increment the offset, fix that. Currently, no damage
was done b/c this is just a field name, but lets have it right.
Fixes: f32f5bd2eb7e ('net/mlx5: Configure cache line size for start and end padding')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reported-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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This callback further invokes the mlxfw module to flash the new
firmware file to the device.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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This callback further invokes the mlxfw module to flash the new
firmware file to the device.
As the firmware flash process takes about 20 seconds and ethtool
takes the rtnl lock during the flash_device callback, we release
the rtnl lock at the beginning of the flash process and take it
again before leaving the callback.
This way, rtnl is not held during the process. To make sure the
device does not get deleted while being flashed, we take a
reference to it before releasing rtnl lock.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Add mlx5 implementation for the ones defined by the mlxfw
shared module to be used while flashing the device firmware.
The callbacks do their job through the MCQI, MCC and MCDA registers.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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To be used by the mlx5 callbacks exposed to the mlxfw module.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Enhance MCAM to allow the driver to query which access regs are
supported. For now, expose the regs needed for FW flashing.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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MCC (Management Component Control) allows to control a firmware
component update.
MCDA (Management Component Data Access) allows to read and write
a firmware component.
MCQI (Management Component Query Information) allows to query
information about firmware components.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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There are upcoming NIC (mlx5) use-cases where people want to avoid
building the mlxfw module, allow for that. The mlxsw module is
untouched and keeps selecting mlxfw.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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For environments where flow-based ipv6 router is offloaded.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Use a macro for the static mapping between the enumeration of field
supported by the firmware for header re-write to the corresponding
network header field. This improves the readability of the code and
doesn't change any functionality.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Enable offloading of TC matching on ip ttl / hop-limit
As matching on ttl is supported only by newer HW brands (ConnectX-5),
we should do capability check before attempting to offload that.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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The code section for offloading matches on ip tos (L3) should come
before and not after the one that deals with tcp/udp (L4) matches.
Otherwise, we might come up with wrong min-inline requirement, when
one attempts to match on both L3 and L4.
Fixes: fd7da28b280d ('net/mlx5e: Offload TC matching on ip tos / traffic-class')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Introduce a Page-Reuse mechanism in non-Striding RQ RX datapath.
A WQE (RX descriptor) buffer is a page, that in most cases was fully
wasted on a packet that is much smaller, requiring a new page for
the next round.
In this patch, we implement a page-reuse mechanism, that resembles a
`SW Striding RQ`.
We allow the WQE to reuse its allocated page as much as it could,
until the page is fully consumed. In each round, the WQE is capable
of receiving packet of maximal size (MTU). Yet, upon the reception of
a packet, the WQE knows the actual packet size, and consumes the exact
amount of memory needed to build a linear SKB. Then, it updates the
buffer pointer within the page accordingly, for the next round.
Feature is mutually exclusive with XDP (packet-per-page)
and LRO (session size is a power of two, needs unused page).
Performance tests:
iperf tcp tests show huge gain:
--------------------------------------------
num streams | BW before | BW after | ratio |
1 | 22.2 | 30.9 | 1.39x |
8 | 64.2 | 93.6 | 1.46x |
64 | 56.7 | 91.4 | 1.61x |
--------------------------------------------
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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In the RX memory scheme of non Striding RQ, we use linear SKBs.
Keeping NET_IP_ALIGN in headroom can improve performance on some archs.
In addition, take this headroom into account when calculating the
LRO WQE size.
These are not needed in Striding RQ as they're done implicitly
within the non-linear SKB allocation.
Fixes: 1bfecfca565c ("net/mlx5e: Build RX SKB on demand")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Build the SKB over the receive packet instead of the
whole page. Getting the SKB's linear data and shared_info
closer improves locality.
In addition, this opens up the possibility to make use of
other parts of the page in the downstream page-reuse patch.
Fixes: 1bfecfca565c ("net/mlx5e: Build RX SKB on demand")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Two entries being added at the same time to the IFLA
policy table, whilst parallel bug fixes to decnet
routing dst handling overlapping with the dst gc removal
in net-next.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Fix refcounting wrt timers which hold onto inet6 address objects,
from Xin Long.
2) Fix an ancient bug in wireless wext ioctls, from Johannes Berg.
3) Firmware handling fixes in brcm80211 driver, from Arend Van Spriel.
4) Several mlx5 driver fixes (firmware readiness, timestamp cap
reporting, devlink command validity checking, tc offloading, etc.)
From Eli Cohen, Maor Dickman, Chris Mi, and Or Gerlitz.
5) Fix dst leak in IP/IP6 tunnels, from Haishuang Yan.
6) Fix dst refcount bug in decnet, from Wei Wang.
7) Netdev can be double freed in register_vlan_device(). Fix from Gao
Feng.
8) Don't allow object to be destroyed while it is being dumped in SCTP,
from Xin Long.
9) Fix dpaa_eth build when modular, from Madalin Bucur.
10) Fix throw route leaks, from Serhey Popovych.
11) IFLA_GROUP missing from if_nlmsg_size() and ifla_policy[] table,
also from Serhey Popovych.
12) Fix premature TX SKB free in stmmac, from Niklas Cassel.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
igmp: add a missing spin_lock_init()
net: stmmac: free an skb first when there are no longer any descriptors using it
sfc: remove duplicate up_write on VF filter_sem
rtnetlink: add IFLA_GROUP to ifla_policy
ipv6: Do not leak throw route references
dt-bindings: net: sms911x: Add missing optional VDD regulators
dpaa_eth: reuse the dma_ops provided by the FMan MAC device
fsl/fman: propagate dma_ops
net/core: remove explicit do_softirq() from busy_poll_stop()
fib_rules: Resolve goto rules target on delete
sctp: ensure ep is not destroyed before doing the dump
net/hns:bugfix of ethtool -t phy self_test
net: 8021q: Fix one possible panic caused by BUG_ON in free_netdev
cxgb4: notify uP to route ctrlq compl to rdma rspq
ip6_tunnel: Correct tos value in collect_md mode
decnet: always not take dst->__refcnt when inserting dst into hash table
ip6_tunnel: fix potential issue in __ip6_tnl_rcv
ip_tunnel: fix potential issue in ip_tunnel_rcv
brcmfmac: fix uninitialized warning in brcmf_usb_probe_phase2()
net/mlx5e: Avoid doing a cleanup call if the profile doesn't have it
...
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Michal Kalderon says:
====================
qed*: File split and rename towards iWARP support
This patch series makes a few more infrastructure changes towards adding
iWARP support. Hopefully this is the last infrastructure change
prior to the iWARP RFC.
Patch #1-3 take care of taking all the common iWARP/RoCE code out of
qed_roce.[ch] and placing it in qed_rdma.[ch]
Patch #4 renames the roce interface file as it is common for
RoCE and iWARP. This patch touches qedr as well.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Rename the qed_roce_if file to qed_rdma_if as it
represents a common interface for RoCE and iWARP.
this commit affects RDMA/qedr as well.
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch places common iWARP / RoCE code in qed_rdma
and roce specific code in qed_roce
There is one new function ( qed_roce_setup ) added, the rest
of the patch removes content from the files and removes some
static definitions.
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds files that will contain common code for RoCE/iWARP.
The files are currently identical to qed_roce.c / qed_roce.h and
intentionally not added to the makefile. The next patch in the series
will modify the files so that roce specific code is left in qed_roce
and common roce/iwarp code will be placed in qed_rdma
This patch is the result of a simple
cp qed_rdma.c qed_roce.c
cp qed_rdma.h qed_roce.h
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The next patch in the series will duplicate qed_roce as part
of code preprations for iWARP support. Do some cleanup before
duplicating
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull more pin control fixes from Linus Walleij:
"Some late arriving fixes. I should have sent earlier, just swamped
with work as usual. Thomas patch makes AMD systems usable despite
firmware bugs so it is fairly important.
- Make the AMD driver use a regular interrupt rather than a chained
one, so the system does not lock up.
- Fix a function call error deep inside the STM32 driver"
* tag 'pinctrl-v4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: stm32: Fix bad function call
pinctrl/amd: Use regular interrupt instead of chained
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In order to be able to retrieve the attached programs from cls_bpf
and act_bpf, we need to expose the prog ids via netlink so that
an application can later on get an fd based on the id through the
BPF_PROG_GET_FD_BY_ID command, and dump related prog info via
BPF_OBJ_GET_INFO_BY_FD command for bpf(2).
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID fixes from Jiri Kosina:
- revert of a commit to magicmouse driver that regressess certain
devices, from Daniel Stone
- quirk for a specific Dell mouse, from Sebastian Parschauer
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
Revert "HID: magicmouse: Set multi-touch keybits for Magic Mouse"
HID: Add quirk for Dell PIXART OEM mouse
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
Pull livepatching fix from Jiri Kosina:
"Fix the way how livepatches are being stacked with respect to RCU,
from Petr Mladek"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
livepatch: Fix stacking of patches with respect to RCU
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more ufs fixes from Al Viro:
"More UFS fixes, unfortunately including build regression fix for the
64-bit s_dsize commit. Fixed in this pile:
- trivial bug in signedness of 32bit timestamps on ufs1
- ESTALE instead of ufs_error() when doing open-by-fhandle on
something deleted
- build regression on 32bit in ufs_new_fragments() - calculating that
many percents of u64 pulls libgcc stuff on some of those. Mea
culpa.
- fix hysteresis loop broken by typo in 2.4.14.7 (right next to the
location of previous bug).
- fix the insane limits of said hysteresis loop on filesystems with
very low percentage of reserved blocks. If it's 5% or less, just
use the OPTSPACE policy.
- calculate those limits once and mount time.
This tree does pass xfstests clean (both ufs1 and ufs2) and it _does_
survive cross-builds.
Again, my apologies for missing that, especially since I have noticed
a related percentage-of-64bit issue in earlier patches (when dealing
with amount of reserved blocks). Self-LART applied..."
* 'ufs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ufs: fix the logics for tail relocation
ufs_iget(): fail with -ESTALE on deleted inode
fix signedness of timestamps on ufs1
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Fix expand_upwards() on architectures with an upward-growing stack (parisc,
metag and partly IA-64) to allow the stack to reliably grow exactly up to
the address space limit given by TASK_SIZE.
Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Trinity gets kernel BUG at mm/mmap.c:1963! in about 3 minutes of
mmap testing. That's the VM_BUG_ON(gap_end < gap_start) at the
end of unmapped_area_topdown(). Linus points out how MAP_FIXED
(which does not have to respect our stack guard gap intentions)
could result in gap_end below gap_start there. Fix that, and
the similar case in its alternative, unmapped_area().
Cc: stable@vger.kernel.org
Fixes: 1be7107fbe18 ("mm: larger stack guard gap, between vmas")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Debugged-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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for connected socket, the incoming_cpu field in the sock struct
is not going to change frequently, but we are setting it
unconditionally for each packet.
Since sk_incoming_cpu and sk_flags share the same cacheline,
and the latter is access by udp_recvmsg(), this cause a cache
miss for each packet for UDP connected socket.
With this patch, we set the incoming cpu field only when the
ingress cpu really changes.
This gives a small but measurable performance improvement for
connected UDP socket.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds the new getsockopt(2) option SO_PEERGROUPS on SOL_SOCKET to
retrieve the auxiliary groups of the remote peer. It is designed to
naturally extend SO_PEERCRED. That is, the underlying data is from the
same credentials. Regarding its syntax, it is based on SO_PEERSEC. That
is, if the provided buffer is too small, ERANGE is returned and @optlen
is updated. Otherwise, the information is copied, @optlen is set to the
actual size, and 0 is returned.
While SO_PEERCRED (and thus `struct ucred') already returns the primary
group, it lacks the auxiliary group vector. However, nearly all access
controls (including kernel side VFS and SYSVIPC, but also user-space
polkit, DBus, ...) consider the entire set of groups, rather than just
the primary group. But this is currently not possible with pure
SO_PEERCRED. Instead, user-space has to work around this and query the
system database for the auxiliary groups of a UID retrieved via
SO_PEERCRED.
Unfortunately, there is no race-free way to query the auxiliary groups
of the PID/UID retrieved via SO_PEERCRED. Hence, the current user-space
solution is to use getgrouplist(3p), which itself falls back to NSS and
whatever is configured in nsswitch.conf(3). This effectively checks
which groups we *would* assign to the user if it logged in *now*. On
normal systems it is as easy as reading /etc/group, but with NSS it can
resort to quering network databases (eg., LDAP), using IPC or network
communication.
Long story short: Whenever we want to use auxiliary groups for access
checks on IPC, we need further IPC to talk to the user/group databases,
rather than just relying on SO_PEERCRED and the incoming socket. This
is unfortunate, and might even result in dead-locks if the database
query uses the same IPC as the original request.
So far, those recursions / dead-locks have been avoided by using
primitive IPC for all crucial NSS modules. However, we want to avoid
re-inventing the wheel for each NSS module that might be involved in
user/group queries. Hence, we would preferably make DBus (and other IPC
that supports access-management based on groups) work without resorting
to the user/group database. This new SO_PEERGROUPS ioctl would allow us
to make dbus-daemon work without ever calling into NSS.
Cc: Michal Sekletar <msekleta@redhat.com>
Cc: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reviewed-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On UDP packets processing, if the BH is the bottle-neck, it
always sees a cache miss while updating rmem_alloc; try to
avoid it prefetching the value as soon as we have the socket
available.
Performances under flood with multiple NIC rx queues used are
unaffected, but when a single NIC rx queue is in use, this
gives ~10% performance improvement.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When CONFIG_QED_RDMA isn't defined, we'd hit the following:
/include/linux/qed/qede_rdma.h:84:19:
warning: ‘qede_rdma_dev_add’ used but never defined [enabled by default]
static inline int qede_rdma_dev_add(struct qede_dev *dev);
Fixes: bbfcd1e8e167 ("qed*: Set rdma generic functions prefix")
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Replace VLAN_HLEN and CRC_SIZE with ETH_FCS_LEN.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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