linux.git/drivers/net/netdevsim/netdev.c, branch v6.6.132

net: netdevsim: don't try to destroy PHC on VFs

2024-01-25T23:35:59+00:00

[ Upstream commit ea937f77208323d35ffe2f8d8fc81b00118bfcda ]

PHC gets initialized in nsim_init_netdevsim(), which
is only called if (nsim_dev_port_is_pf()).

Create a counterpart of nsim_init_netdevsim() and
move the mock_phc_destroy() there.

This fixes a crash trying to destroy netdevsim with
VFs instantiated, as caught by running the devlink.sh test:

    BUG: kernel NULL pointer dereference, address: 00000000000000b8
    RIP: 0010:mock_phc_destroy+0xd/0x30
    Call Trace:
     
     nsim_destroy+0x4a/0x70 [netdevsim]
     __nsim_dev_port_del+0x47/0x70 [netdevsim]
     nsim_dev_reload_destroy+0x105/0x120 [netdevsim]
     nsim_drv_remove+0x2f/0xb0 [netdevsim]
     device_release_driver_internal+0x1a1/0x210
     bus_remove_device+0xd5/0x120
     device_del+0x159/0x490
     device_unregister+0x12/0x30
     del_device_store+0x11a/0x1a0 [netdevsim]
     kernfs_fop_write_iter+0x130/0x1d0
     vfs_write+0x30b/0x4b0
     ksys_write+0x69/0xf0
     do_syscall_64+0xcc/0x1e0
     entry_SYSCALL_64_after_hwframe+0x6f/0x77

Fixes: b63e78fca889 ("net: netdevsim: use mock PHC driver")
Signed-off-by: Jakub Kicinski 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller 
Signed-off-by: Sasha Levin

net: netdevsim: mimic tc-taprio offload

2023-08-09T22:59:21+00:00

To be able to use netdevsim for tc-testing with an offloaded tc-taprio
schedule, it needs to report a PTP clock (which it now does), and to
accept ndo_setup_tc(TC_SETUP_QDISC_TAPRIO) calls.

Since netdevsim has no packet I/O, this doesn't do anything intelligent,
it only allows taprio offload code paths to go through some level of
automated testing.

Signed-off-by: Vladimir Oltean 
Link: https://lore.kernel.org/r/20230807193324.4128292-9-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

net: netdevsim: use mock PHC driver

2023-08-09T22:59:21+00:00

I'd like to make netdevsim offload tc-taprio, but currently, this Qdisc
emits a ETHTOOL_GET_TS_INFO call to the driver to make sure that it has
a PTP clock, so that it is reasonably capable of offloading the schedule.

By using the mock PHC driver, that becomes possible.

Hardware timestamping is not necessary, and netdevsim does not support
packet I/O anyway.

Signed-off-by: Vladimir Oltean 
Link: https://lore.kernel.org/r/20230807193324.4128292-8-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

netdevsim: add dummy macsec offload

2023-07-14T08:16:53+00:00

When the kernel is compiled with MACsec support, add the
NETIF_F_HW_MACSEC feature to netdevsim devices and implement
macsec_ops.

To allow easy testing of failure from the device, support is limited
to 3 SecY's per netdevsim device, and 1 RXSC per SecY.

v2:
 - nsim_macsec_add_secy, return -ENOSPC if secy_count isn't full but
   we can't find an empty slot (Simon Horman)
 - add sci_to_cpu to make sparse happy (Simon Horman)
 - remove set but not used secy variable (kernel test robot and
   Simon Horman)

Signed-off-by: Sabrina Dubroca 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller

drivers: net: turn on XDP features

2023-02-03T04:48:23+00:00

A summary of the flags being set for various drivers is given below.
Note that XDP_F_REDIRECT_TARGET and XDP_F_FRAG_TARGET are features
that can be turned off and on at runtime. This means that these flags
may be set and unset under RTNL lock protection by the driver. Hence,
READ_ONCE must be used by code loading the flag value.

Also, these flags are not used for synchronization against the availability
of XDP resources on a device. It is merely a hint, and hence the read
may race with the actual teardown of XDP resources on the device. This
may change in the future, e.g. operations taking a reference on the XDP
resources of the driver, and in turn inhibiting turning off this flag.
However, for now, it can only be used as a hint to check whether device
supports becoming a redirection target.

Turn 'hw-offload' feature flag on for:
 - netronome (nfp)
 - netdevsim.

Turn 'native' and 'zerocopy' features flags on for:
 - intel (i40e, ice, ixgbe, igc)
 - mellanox (mlx5).
 - stmmac
 - netronome (nfp)

Turn 'native' features flags on for:
 - amazon (ena)
 - broadcom (bnxt)
 - freescale (dpaa, dpaa2, enetc)
 - funeth
 - intel (igb)
 - marvell (mvneta, mvpp2, octeontx2)
 - mellanox (mlx4)
 - mtk_eth_soc
 - qlogic (qede)
 - sfc
 - socionext (netsec)
 - ti (cpsw)
 - tap
 - tsnep
 - veth
 - xen
 - virtio_net.

Turn 'basic' (tx, pass, aborted and drop) features flags on for:
 - netronome (nfp)
 - cavium (thunder)
 - hyperv.

Turn 'redirect_target' feature flag on for:
 - amanzon (ena)
 - broadcom (bnxt)
 - freescale (dpaa, dpaa2)
 - intel (i40e, ice, igb, ixgbe)
 - ti (cpsw)
 - marvell (mvneta, mvpp2)
 - sfc
 - socionext (netsec)
 - qlogic (qede)
 - mellanox (mlx5)
 - tap
 - veth
 - virtio_net
 - xen

Reviewed-by: Gerhard Engleder 
Reviewed-by: Simon Horman 
Acked-by: Stanislav Fomichev 
Acked-by: Jakub Kicinski 
Co-developed-by: Kumar Kartikeya Dwivedi 
Signed-off-by: Kumar Kartikeya Dwivedi 
Co-developed-by: Lorenzo Bianconi 
Signed-off-by: Lorenzo Bianconi 
Signed-off-by: Marek Majtyka 
Link: https://lore.kernel.org/r/3eca9fafb308462f7edb1f58e451d59209aa07eb.1675245258.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov

net: remove unused ndo_get_devlink_port

2022-11-04T03:48:36+00:00

Remove ndo_get_devlink_port which is no longer used alongside with the
implementations in drivers.

Signed-off-by: Jiri Pirko 
Signed-off-by: Jakub Kicinski

net: make drivers to use SET_NETDEV_DEVLINK_PORT to set devlink_port

2022-11-04T03:48:34+00:00

Benefit from the previously implemented tracking of netdev events in
devlink code and instead of calling  devlink_port_type_eth_set() and
devlink_port_type_clear() to set devlink port type and link to related
netdev, use SET_NETDEV_DEVLINK_PORT() macro to assign devlink_port
pointer to netdevice which is about to be registered.

Signed-off-by: Jiri Pirko 
Signed-off-by: Jakub Kicinski

net: Remove the obsolte u64_stats_fetch_*_irq() users (drivers).

2022-10-29T03:13:54+00:00

Now that the 32bit UP oddity is gone and 32bit uses always a sequence
count, there is no need for the fetch_irq() variants anymore.

Convert to the regular interface.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Sebastian Andrzej Siewior 
Acked-by: Peter Zijlstra (Intel) 
Signed-off-by: Jakub Kicinski

net: Use u64_stats_fetch_begin_irq() for stats fetch.

2022-08-29T12:02:27+00:00

On 32bit-UP u64_stats_fetch_begin() disables only preemption. If the
reader is in preemptible context and the writer side
(u64_stats_update_begin*()) runs in an interrupt context (IRQ or
softirq) then the writer can update the stats during the read operation.
This update remains undetected.

Use u64_stats_fetch_begin_irq() to ensure the stats fetch on 32bit-UP
are not interrupted by a writer. 32bit-SMP remains unaffected by this
change.

Cc: "David S. Miller" 
Cc: Catherine Sullivan 
Cc: David Awogbemila 
Cc: Dimitris Michailidis 
Cc: Eric Dumazet 
Cc: Hans Ulli Kroll 
Cc: Jakub Kicinski 
Cc: Jeroen de Borst 
Cc: Johannes Berg 
Cc: Linus Walleij 
Cc: Paolo Abeni 
Cc: Simon Horman 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: oss-drivers@corigine.com
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller

netdevsim: move vfconfig to nsim_dev

2021-11-01T13:29:41+00:00

When netdevsim got split into the faux bus vfconfig ended
up in the bus device (think pci_dev) which is strange because
it contains very networky not to say netdevy information.
Move it to nsim_dev, which is the driver "priv" structure
for the device.

To make sure we don't race with probe/remove take
the device lock (much like PCI).

While at it remove the NULL-checking of vfconfigs.
It appears to be pointless.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller