Petr Machata 9309f97aef net: dev: Add hardware stats support ... Offloading switch device drivers may be able to collect statistics of the traffic taking place in the HW datapath that pertains to a certain soft netdevice, such as VLAN. Add the necessary infrastructure to allow exposing these statistics to the offloaded netdevice in question. The API was shaped by the following considerations: - Collection of HW statistics is not free: there may be a finite number of counters, and the act of counting may have a performance impact. It is therefore necessary to allow toggling whether HW counting should be done for any particular SW netdevice. - As the drivers are loaded and removed, a particular device may get offloaded and unoffloaded again. At the same time, the statistics values need to stay monotonic (modulo the eventual 64-bit wraparound), increasing only to reflect traffic measured in the device. To that end, the netdevice keeps around a lazily-allocated copy of struct rtnl_link_stats64. Device drivers then contribute to the values kept therein at various points. Even as the driver goes away, the struct stays around to maintain the statistics values. - Different HW devices may be able to count different things. The motivation behind this patch in particular is exposure of HW counters on Nvidia Spectrum switches, where the only practical approach to counting traffic on offloaded soft netdevices currently is to use router interface counters, and count L3 traffic. Correspondingly that is the statistics suite added in this patch. Other devices may be able to measure different kinds of traffic, and for that reason, the APIs are built to allow uniform access to different statistics suites. - Because soft netdevices and offloading drivers are only loosely bound, a netdevice uses a notifier chain to communicate with the drivers. Several new notifiers, NETDEV_OFFLOAD_XSTATS_*, have been added to carry messages to the offloading drivers. - Devices can have various conditions for when a particular counter is available. As the device is configured and reconfigured, the device offload may become or cease being suitable for counter binding. A netdevice can use a notifier type NETDEV_OFFLOAD_XSTATS_REPORT_USED to ping offloading drivers and determine whether anyone currently implements a given statistics suite. This information can then be propagated to user space. When the driver decides to unoffload a netdevice, it can use a newly-added function, netdev_offload_xstats_report_delta(), to record outstanding collected statistics, before destroying the HW counter. This patch adds a helper, call_netdevice_notifiers_info_robust(), for dispatching a notifier with the possibility of unwind when one of the consumers bails. Given the wish to eventually get rid of the global notifier block altogether, this helper only invokes the per-netns notifier block. Signed-off-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2022-03-03 10:37:23 +00:00
..
android	binder: fix freeze race	2021-09-14 08:46:08 +02:00
byteorder	uapi: Fix undefined __always_inline on non-glibc systems	2021-12-21 15:09:46 -08:00
caif
can	can: netlink: report the CAN controller mode supported flags	2022-01-05 12:09:06 +01:00
cifs	cifs: remove pathname for file from SPDX header	2021-09-13 14:51:10 -05:00
dvb	Revert "media: dvb header files: move some headers to staging"	2021-08-23 09:49:09 -07:00
genwqe
hdlc
hsi
iio
isdn
misc
mmc
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-02-10 17:29:56 -08:00
netfilter_arp
netfilter_bridge
netfilter_ipv4
netfilter_ipv6
nfsd	NFSD: move filehandle format declarations out of "uapi".	2021-10-02 15:50:45 -04:00
raid
sched
spi
sunrpc
surface_aggregator
tc_act
tc_ematch
usb
a.out.h
acct.h
acrn.h	virt: acrn: Introduce interfaces for virtual device creating/destroying	2021-10-05 16:14:10 +02:00
adb.h
adfs_fs.h
affs_hardblocks.h
agpgart.h
aio_abi.h
am437x-vpfe.h
amt.h	amt: add control plane of amt interface	2021-11-01 13:36:08 +00:00
apm_bios.h
arcfb.h
arm_sdei.h
aspeed-lpc-ctrl.h
aspeed-p2a-ctrl.h
atalk.h
atm.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_tcp.h
atm_zatm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
audit.h	audit: replace zero-length array with flexible-array member	2021-12-20 14:53:27 -05:00
auto_dev-ioctl.h
auto_fs.h
auto_fs4.h
auxvec.h
ax25.h
batadv_packet.h
batman_adv.h
baycom.h
bcm933xx_hcs.h
bfs_fs.h
binfmts.h
blkpg.h
blktrace_api.h
blkzoned.h
bpf.h	bpf: Make remote_port field in struct bpf_sk_lookup 16-bit wide	2022-02-09 11:40:45 -08:00
bpf_common.h
bpf_perf_event.h
bpfilter.h
bpqether.h
bsg.h
bt-bmc.h
btf.h	bpf: Support BTF_KIND_TYPE_TAG for btf_type_tag attributes	2021-11-11 17:41:11 -08:00
btrfs.h	btrfs: send: prepare for v2 protocol	2021-10-29 12:38:43 +02:00
btrfs_tree.h	btrfs: remove no longer needed logic for replaying directory deletes	2022-01-03 15:09:42 +01:00
can.h
capability.h
capi.h
cciss_defs.h
cciss_ioctl.h
ccs.h
cdrom.h	drivers/cdrom: improved ioctl for media change detection	2021-09-14 20:05:26 -06:00
cec-funcs.h
cec.h
cfm_bridge.h
cgroupstats.h
chio.h
close_range.h
cm4000_cs.h
cn_proc.h
coda.h
coff.h
comedi.h	comedi: Move the main COMEDI headers	2021-11-26 16:48:59 +01:00
connector.h
const.h
coresight-stm.h
counter.h	counter: Add character device interface	2021-10-17 10:53:52 +01:00
cramfs_fs.h
cryptouser.h
cuda.h
cxl_mem.h	cxl/uapi: Fix defined but not used warnings	2021-09-07 11:39:01 -07:00
cyclades.h	tty: Partially revert the removal of the Cyclades public API	2022-01-26 14:49:46 +01:00
cycx_cfm.h
dcbnl.h
dccp.h
devlink.h	devlink: report maximum number of snapshots with regions	2021-10-01 14:28:55 +01:00
dlm.h
dlm_device.h	treewide: Replace 0-element memcpy() destinations with flexible arrays	2021-10-18 12:28:53 -07:00
dlm_netlink.h
dlm_plock.h
dlmconstants.h
dm-ioctl.h	dm ima: measure data on table load	2021-08-10 13:32:40 -04:00
dm-log-userspace.h
dma-buf.h
dma-heap.h
dn.h
dns_resolver.h
dqblk_xfs.h
edd.h
efs_fs_sb.h
elf-em.h
elf-fdpic.h
elf.h
errno.h
errqueue.h
erspan.h
ethtool.h	ethtool: add support to set/get tx copybreak buf size via ethtool	2021-11-22 12:31:47 +00:00
ethtool_netlink.h	ethtool: add support to set/get completion queue event size	2022-02-23 20:33:05 -08:00
eventpoll.h
f2fs.h
fadvise.h
falloc.h
fanotify.h	fanotify: report old and/or new parent+name in FAN_RENAME event	2021-12-15 15:57:31 +01:00
fb.h
fcntl.h
fd.h
fdreg.h
fib_rules.h
fiemap.h
filter.h
firewire-cdev.h
firewire-constants.h
fou.h
fpga-dfl.h
fs.h
fscrypt.h
fsi.h
fsl_hypervisor.h
fsl_mc.h
fsmap.h
fsverity.h
fuse.h	fuse: support per inode DAX in fuse protocol	2021-12-14 11:09:36 +01:00
futex.h	futex: Implement sys_futex_waitv()	2021-10-07 13:51:11 +02:00
gameport.h
gen_stats.h
genetlink.h
gfs2_ondisk.h
gpio.h
gsmmux.h
gtp.h
hash_info.h
hdlc.h
hdlcdrv.h
hdreg.h
hid.h
hiddev.h
hidraw.h
hpet.h
hsr_netlink.h
hw_breakpoint.h
hyperv.h	hyper-v: Replace uuid.h with types.h	2021-10-06 12:05:51 +00:00
i2c-dev.h	Revert "Merge branch 'mctp-i2c-driver'"	2021-11-15 07:53:10 -08:00
i2c.h	Revert "Merge branch 'mctp-i2c-driver'"	2021-11-15 07:53:10 -08:00
i2o-dev.h
i8k.h
icmp.h
icmpv6.h
idxd.h	dmaengine: idxd: change MSIX allocation based on per wq activation	2022-01-05 13:11:22 +05:30
if.h
if_addr.h	net: Add new protocol attribute to IP addresses	2022-02-18 21:20:06 -08:00
if_addrlabel.h
if_alg.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h	net: bridge: vlan: convert mcast router global option to per-vlan entry	2021-08-20 15:00:35 +01:00
if_cablemodem.h
if_eql.h
if_ether.h	if_ether.h: add EtherCAT Ethertype	2022-03-01 18:29:27 -08:00
if_fc.h
if_fddi.h
if_hippi.h
if_infiniband.h
if_link.h	net: dev: Add hardware stats support	2022-03-03 10:37:23 +00:00
if_ltalk.h
if_macsec.h
if_packet.h
if_phonet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h
if_slip.h
if_team.h
if_tun.h
if_tunnel.h
if_vlan.h
if_x25.h
if_xdp.h
ife.h
igmp.h
ila.h
in.h	net/ipv4/ipv6: Replace one-element arraya with flexible-array members	2021-08-05 11:46:42 +01:00
in6.h
in_route.h
inet_diag.h
inotify.h
input-event-codes.h
input.h
io_uring.h	io_uring: add option to skip CQE posting	2021-11-24 11:17:53 -07:00
ioam6.h
ioam6_genl.h
ioam6_iptunnel.h	uapi: ioam: Insertion frequency	2022-02-04 20:24:45 -08:00
ioctl.h
iommu.h
ioprio.h	block: fix default IO priority handling	2021-08-18 07:23:15 -06:00
ip.h	net: arp: introduce arp_evict_nocarrier sysctl parameter	2021-11-01 19:57:14 -07:00
ip6_tunnel.h
ip_vs.h
ipc.h
ipmi.h	ipmi: Add support for IPMB direct messages	2021-10-05 06:54:16 -05:00
ipmi_bmc.h
ipmi_msgdefs.h
ipsec.h
ipv6.h	net: ndisc: introduce ndisc_evict_nocarrier sysctl parameter	2021-11-01 19:57:14 -07:00
ipv6_route.h
irqnr.h
iso_fs.h
isst_if.h
ivtv.h
ivtvfb.h
jffs2.h
joystick.h
kcm.h
kcmp.h
kcov.h
kd.h
kdev_t.h
kernel-page-flags.h
kernel.h
kernelcapi.h
kexec.h
keyboard.h
keyctl.h
kfd_ioctl.h	drm/amdkfd: Allow querying SVM attributes that are clear	2021-08-06 16:12:32 -04:00
kfd_sysfs.h	drm/amdkfd: make SPDX License expression more sound	2022-01-11 15:44:27 -05:00
kvm.h	kvm: Move KVM_GET_XSAVE2 IOCTL definition at the end of kvm.h	2022-01-31 09:21:56 -05:00
kvm_para.h
l2tp.h
landlock.h
libc-compat.h
limits.h
lirc.h
llc.h
loop.h
lp.h
lwtunnel.h
magic.h	The highlight is the new mount "device" string syntax implemented	2022-01-20 13:46:20 +02:00
major.h
map_to_7segment.h
map_to_14segment.h	uapi: Add <linux/map_to_14segment.h>	2021-10-21 23:36:28 +02:00
matroxfb.h
max2175.h
mctp.h	mctp: Add SIOCMCTP{ALLOC,DROP}TAG ioctls for tag control	2022-02-09 12:00:11 +00:00
mdio.h	net: phy: add constants for fast retrain related register	2021-10-25 14:04:18 +01:00
media-bus-format.h
media.h
mei.h
membarrier.h
memfd.h
mempolicy.h	mm/mempolicy: add MPOL_PREFERRED_MANY for multiple preferred nodes	2021-09-03 09:58:17 -07:00
meye.h
mii.h
minix_fs.h
mman.h
mmtimer.h
module.h	module: add in-kernel support for decompressing	2022-01-11 18:45:02 -08:00
mount.h
mpls.h
mpls_iptunnel.h
mptcp.h	mptcp: add missing documented NL params	2021-12-14 18:49:40 -08:00
mqueue.h
mroute.h
mroute6.h	net: ip6mr: add support for passing full packet on wrong mif	2022-02-19 16:05:54 +00:00
mrp_bridge.h
msdos_fs.h
msg.h
mtio.h
nbd-netlink.h
nbd.h
ncsi.h
ndctl.h
neighbour.h	net, neigh: Add NTF_MANAGED flag for managed neighbor entries	2021-10-12 11:27:47 +01:00
net.h
net_dropmon.h	net: drop_monitor: support drop reason	2022-02-09 17:25:57 -08:00
net_namespace.h
net_tstamp.h	net_tstamp: define new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX	2021-12-29 12:31:36 -08:00
netconf.h
netdevice.h
netfilter.h	netfilter: Introduce egress hook	2021-10-14 23:06:28 +02:00
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h
netlink_diag.h
netrom.h
nexthop.h
nfc.h	nfc: uapi: use kernel size_t to fix user-space builds	2021-12-27 14:58:37 +00:00
nfs.h
nfs2.h
nfs3.h
nfs4.h
nfs4_mount.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfsacl.h
nilfs2_api.h
nilfs2_ondisk.h
nitro_enclaves.h	nitro_enclaves: Add fixes for checkpatch spell check reports	2021-09-14 11:11:20 +02:00
nl80211-vnd-intel.h	nl80211: vendor-cmd: intel: add more details for IWL_MVM_VENDOR_CMD_HOST_GET_OWNERSHIP	2021-10-21 17:25:17 +02:00
nl80211.h	nl80211: clarify comment for mesh PLINK_BLOCKED state	2022-01-04 15:50:23 +01:00
nsfs.h
nubus.h
nvme_ioctl.h
nvram.h
omap3isp.h
omapfb.h
oom.h
openat2.h
openvswitch.h	net: openvswitch: IPv6: Add IPv6 extension header support	2022-02-25 10:32:55 +00:00
packet_diag.h
param.h
parport.h
patchkey.h
pci.h
pci_regs.h	pci-v5.17-changes	2022-01-16 08:08:11 +02:00
pcitest.h
perf_event.h	perf: uapi: Document perf_event_attr::sig_data truncation on 32 bit architectures	2022-02-02 13:11:40 +01:00
personality.h
pfkeyv2.h	xfrm: Add support for SM4 symmetric cipher algorithm	2021-12-23 09:32:51 +01:00
pfrut.h	ACPI: Introduce Platform Firmware Runtime Telemetry driver	2021-12-27 17:12:58 +01:00
pg.h
phantom.h
phonet.h
pidfd.h
pkt_cls.h	flow_offload: add skip_hw and skip_sw to control if offload the action	2021-12-19 14:08:48 +00:00
pkt_sched.h	fq_codel: generalise ce_threshold marking for subset of traffic	2021-10-20 15:24:36 -07:00
pktcdvd.h
pmu.h
poll.h
posix_acl.h
posix_acl_xattr.h
posix_types.h
ppdev.h
ppp-comp.h
ppp-ioctl.h
ppp_defs.h
pps.h
pr.h
prctl.h	mm: add a field to store names for private anonymous memory	2022-01-15 16:30:27 +02:00
psample.h
psci.h
psp-sev.h
ptp_clock.h
ptrace.h
qemu_fw_cfg.h
qnx4_fs.h
qnxtypes.h
qrtr.h
quota.h
radeonfb.h
random.h
rds.h
reboot.h
reiserfs_fs.h
reiserfs_xattr.h
remoteproc_cdev.h
resource.h	Increase default MLOCK_LIMIT to 8 MiB	2021-12-10 17:10:55 -08:00
rfkill.h
rio_cm_cdev.h
rio_mport_cdev.h
rkisp1-config.h
romfs_fs.h
rose.h
route.h
rpl.h
rpl_iptunnel.h
rpmsg.h
rpmsg_types.h
rseq.h
rtc.h	rtc: add BSM parameter	2021-10-18 17:20:50 +02:00
rtnetlink.h	rtnetlink: add new rtm tunnel api for tunnel id filtering	2022-03-01 08:38:02 +00:00
rxrpc.h
scc.h
sched.h
scif_ioctl.h
screen_info.h
sctp.h
seccomp.h
securebits.h
sed-opal.h
seg6.h
seg6_genl.h
seg6_hmac.h
seg6_iptunnel.h
seg6_local.h
selinux_netlink.h
sem.h
serial.h
serial_core.h
serial_reg.h
serio.h
shm.h
signal.h
signalfd.h
smc.h	net/smc: Add global configure for handshake limitation by netlink	2022-02-11 11:14:58 +00:00
smc_diag.h	Partially revert "net/smc: Add netlink net namespace support"	2022-02-02 07:42:41 -08:00
smiapp.h
snmp.h	Revert "net: snmp: add statistics for tcp small queue check"	2021-12-01 19:06:09 -08:00
sock_diag.h
socket.h	txhash: Add socket option to control TX hash rethink behavior	2022-01-31 15:05:25 +00:00
sockios.h
sonet.h
sonypi.h
sound.h
soundcard.h	kbuild: move headers_check.pl to usr/include/	2022-01-08 17:41:00 +09:00
stat.h
stddef.h	stddef: Introduce DECLARE_FLEX_ARRAY() helper	2021-10-18 12:28:52 -07:00
stm.h
string.h
suspend_ioctls.h
swab.h
switchtec_ioctl.h
sync_file.h
synclink.h
sysctl.h	net: arp: introduce arp_evict_nocarrier sysctl parameter	2021-11-01 19:57:14 -07:00
sysinfo.h
target_core_user.h
taskstats.h	delayacct: track delays from memory compact	2022-01-20 08:52:55 +02:00
tcp.h
tcp_metrics.h
tee.h
termios.h
thermal.h
time.h
time_types.h
timerfd.h
times.h
timex.h
tiocl.h
tipc.h
tipc_config.h
tipc_netlink.h
tipc_sockets_diag.h
tls.h	net/tls: support SM4 GCM/CCM algorithm	2021-09-16 14:36:26 +01:00
toshiba.h
tty.h	mctp: Add MCTP-over-serial transport binding	2021-11-23 11:47:51 +00:00
tty_flags.h
types.h
udf_fs_i.h
udmabuf.h
udp.h
uhid.h
uinput.h
uio.h
uleds.h
ultrasound.h
um_timetravel.h
un.h
unistd.h
unix_diag.h
usbdevice_fs.h
usbip.h
userfaultfd.h
userio.h
utime.h
utsname.h
uuid.h	uuid: remove licence boilerplate text from the header	2022-01-20 08:52:54 +02:00
uvcvideo.h
v4l2-common.h
v4l2-controls.h	media: uapi: Add VP9 stateless decoder controls	2021-11-22 07:44:55 +00:00
v4l2-dv-timings.h
v4l2-mediabus.h
v4l2-subdev.h
vbox_err.h
vbox_vmmdev_types.h
vboxguest.h
vdpa.h	vdpa: Support reporting max device capabilities	2022-01-14 18:50:54 -05:00
vduse.h	vduse: Introduce VDUSE - vDPA Device in Userspace	2021-09-06 07:20:58 -04:00
veth.h
vfio.h
vfio_ccw.h
vfio_zdev.h
vhost.h
vhost_types.h
videodev2.h	media: uapi: Add VP9 stateless decoder controls	2021-11-22 07:44:55 +00:00
virtio_9p.h
virtio_balloon.h
virtio_blk.h
virtio_bt.h
virtio_config.h
virtio_console.h
virtio_crypto.h
virtio_fs.h
virtio_gpio.h	virtio_gpio: drop packed attribute	2021-11-04 16:36:54 +01:00
virtio_gpu.h	virtio-gpu api: multiple context types with explicit initialization	2021-09-29 09:22:29 +02:00
virtio_i2c.h	i2c: virtio: Add support for zero-length requests	2021-11-01 05:26:48 -04:00
virtio_ids.h	virtio,vdpa,vhost: features, fixes	2021-09-11 14:48:42 -07:00
virtio_input.h
virtio_iommu.h	iommu/virtio: Add definitions for VIRTIO_IOMMU_F_BYPASS_CONFIG	2021-12-06 15:03:05 +01:00
virtio_mem.h	virtio-mem: support VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE	2021-11-10 15:32:38 +01:00
virtio_mmio.h
virtio_net.h
virtio_pci.h
virtio_pcidev.h	um: virt-pci: fix uapi documentation	2021-08-26 22:28:03 +02:00
virtio_pmem.h
virtio_ring.h
virtio_rng.h
virtio_scmi.h	firmware: arm_scmi: Add virtio transport	2021-08-05 10:24:08 +01:00
virtio_scsi.h
virtio_snd.h
virtio_types.h
virtio_vsock.h	virtio/vsock: add 'VIRTIO_VSOCK_SEQ_EOR' bit.	2021-09-05 16:23:09 -04:00
vm_sockets.h	vsock: Enable y2038 safe timeval for timeout	2021-10-08 16:21:53 +01:00
vm_sockets_diag.h
vmcore.h
vsockmon.h
vt.h
vtpm_proxy.h
wait.h
watch_queue.h
watchdog.h
wireguard.h
wireless.h
wmi.h
wwan.h
x25.h
xattr.h
xdp_diag.h
xfrm.h	xfrm: rate limit SA mapping change message to user space	2021-12-23 09:32:51 +01:00
xilinx-v4l2-controls.h
zorro.h
zorro_ids.h