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  1. 03 10月, 2019 12 次提交
    • R
      Minor fixes to the CAIF Transport drivers Kconfig file · 0f04f8ea
      由 rd.dunlab@gmail.com 提交于 
      Minor fixes to the CAIF Transport drivers Kconfig file:

- end sentence with period
- capitalize CAIF acronym
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      0f04f8ea
    • R
      Isolate CAIF transport drivers into their own menu · 21d54976
      由 rd.dunlab@gmail.com 提交于 
      Isolate CAIF transport drivers into their own menu.

This cleans up the main Network device support menu,
makes it easier to find the CAIF drivers, and makes it
easier to enable/disable them as a group.
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      21d54976
    • R
      Clean up the net/caif/Kconfig menu · 0903102f
      由 rd.dunlab@gmail.com 提交于 
      Clean up the net/caif/Kconfig menu:
- remove extraneous space
- minor language tweaks
- fix punctuation
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      0903102f
    • E
      net_sched: remove need_resched() from qdisc_run() · b60fa1c5
      由 Eric Dumazet 提交于 
      The introduction of this schedule point was done in commit
2ba2506c ("[NET]: Add preemption point in qdisc_run")
at a time the loop was not bounded.

Then later in commit d5b8aa1d ("net_sched: fix dequeuer fairness")
we added a limit on the number of packets.

Now is the time to remove the schedule point, since the default
limit of 64 packets matches the number of packets a typical NAPI
poll can process in a row.

This solves a latency problem for most TCP receivers under moderate load :

1) host receives a packet.
   NET_RX_SOFTIRQ is raised by NIC hard IRQ handler

2) __do_softirq() does its first loop, handling NET_RX_SOFTIRQ
   and calling the driver napi->loop() function

3) TCP stores the skb in socket receive queue:

4) TCP calls sk->sk_data_ready() and wakeups a user thread
   waiting for EPOLLIN (as a result, need_resched() might now be true)

5) TCP cooks an ACK and sends it.

6) qdisc_run() processes one packet from qdisc, and sees need_resched(),
   this raises NET_TX_SOFTIRQ (even if there are no more packets in
   the qdisc)

Then we go back to the __do_softirq() in 2), and we see that new
softirqs were raised. Since need_resched() is true, we end up waking
ksoftirqd in this path :

    if (pending) {
            if (time_before(jiffies, end) && !need_resched() &&
                --max_restart)
                    goto restart;

            wakeup_softirqd();
    }

So we have many wakeups of ksoftirqd kernel threads,
and more calls to qdisc_run() with associated lock overhead.

Note that another way to solve the issue would be to change TCP
to first send the ACK packet, then signal the EPOLLIN,
but this changes P99 latencies, as sending the ACK packet
can add a long delay.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b60fa1c5
    • V
      net: dsa: Remove unused __DSA_SKB_CB macro · 37048e94
      由 Vladimir Oltean 提交于 
      The struct __dsa_skb_cb is supposed to span the entire 48-byte skb
control block, while the struct dsa_skb_cb only the portion of it which
is used by the DSA core (the rest is available as private data to
drivers).

The DSA_SKB_CB and __DSA_SKB_CB helpers are supposed to help retrieve
this pointer based on a skb, but it turns out there is nobody directly
interested in the struct __dsa_skb_cb in the kernel. So remove it.
Signed-off-by: NVladimir Oltean <olteanv@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      37048e94
    • D
      Merge branch 'sja1105-cleanups' · b74d402e
      由 David S. Miller 提交于 
      Vladimir Oltean says:

====================
SJA1105 DSA coding style cleanup

This series provides some mechanical cleanup patches related to function
names and prototypes.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b74d402e
    • V
      net: dsa: sja1105: Rename sja1105_spi_send_packed_buf to sja1105_xfer_buf · 1bd44870
      由 Vladimir Oltean 提交于 
      The most commonly called function in the driver is long due for a
rename. The "packed" word is redundant (it doesn't make sense to
transfer an unpacked structure, since that is in CPU endianness yadda
yadda), and the "spi" word is also redundant since argument 2 of the
function is SPI_READ or SPI_WRITE.

As for the sja1105_spi_send_long_packed_buf function, it is only being
used from sja1105_spi.c, so remove its global prototype.
Signed-off-by: NVladimir Oltean <olteanv@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1bd44870
    • V
      net: dsa: sja1105: Replace sja1105_spi_send_int with sja1105_xfer_{u32, u64} · dff79620
      由 Vladimir Oltean 提交于 
      Having a function that takes a variable number of unpacked bytes which
it generically calls an "int" is confusing and makes auditing patches
next to impossible.

We only use spi_send_int with the int sizes of 32 and 64 bits. So just
make the spi_send_int function less generic and replace it with the
appropriate two explicit functions, which can now type-check the int
pointer type.

Note that there is still a small weirdness in the u32 function, which
has to convert it to a u64 temporary. This is because of how the packing
API works at the moment, but the weirdness is at least hidden from
callers of sja1105_xfer_u32 now.
Suggested-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NVladimir Oltean <olteanv@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      dff79620
    • V
      net: dsa: sja1105: Don't use "inline" function declarations in C files · 09c1b412
      由 Vladimir Oltean 提交于 
      Let the compiler decide.
Signed-off-by: NVladimir Oltean <olteanv@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      09c1b412
    • D
      Merge branch 'SMB-rootfs' · 5cf37738
      由 David S. Miller 提交于 
      Paulo Alcantara says:

====================
Experimental SMB rootfs support

This patch series enables Linux to mount root file systems over the
network by utilizing SMB protocol.

Upstream commit 8eecd1c2 ("cifs: Add support for root file
systems") introduced a new CONFIG_CIFS_ROOT option, a virtual device
(Root_CIFS) and a kernel cmdline parameter "cifsroot=" which tells the
kernel to actually mount the root filesystem over a SMB share.

The feature relies on ipconfig to set up the network prior to mounting
the rootfs, so when it is set along with "cifsroot=" parameter:

    (1) cifs_root_setup() parses all necessary data out of "cifsroot="
    parameter for the init process know how to mount the SMB rootfs
    (e.g. SMB server address, mount options).

    (2) If DHCP failed for some reason in ipconfig, we keep retrying
    forever as we have nowhere to go for NFS or SMB root
    filesystems (see PATCH 2/2). Otherwise go to (3).

    (3) mount_cifs_root() is then called by mount_root() (ROOT_DEV ==
    Root_CIFS), retrieves early parsed data from (1), then attempt to
    mount SMB rootfs by CIFSROOT_RETRY_MAX times at most (see PATCH
    1/2).

    (4) If all attempts failed, fall back to floppy drive, otherwise
    continue the boot process with rootfs mounted over a SMB share.

My idea was to keep the same behavior of nfsroot - as it seems to work
for most users so far.

For more information on how this feature works, see
Documentation/filesystems/cifs/cifsroot.txt.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      5cf37738
    • P
      ipconfig: Handle CONFIG_CIFS_ROOT option · 51976f47
      由 Paulo Alcantara (SUSE) 提交于 
      The experimental root file system support in cifs.ko relies on
ipconfig to set up the network stack and then accessing the SMB share
that contains the rootfs files.
Signed-off-by: NPaulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      51976f47
    • P
      init: Support mounting root file systems over SMB · 8902dd52
      由 Paulo Alcantara (SUSE) 提交于 
      Add a new virtual device named /dev/cifs (0xfe) to tell the kernel to
mount the root file system over the network by using SMB protocol.

cifs_root_data() will be responsible to retrieve the parsed
information of the new command-line option (cifsroot=) and then call
do_mount_root() with the appropriate mount options for cifs.ko.
Signed-off-by: NPaulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      8902dd52
  3. 02 10月, 2019 27 次提交
  5. 29 9月, 2019 1 次提交
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 02dc96ef
      由 Linus Torvalds 提交于 
      Pull networking fixes from David Miller:

 1) Sanity check URB networking device parameters to avoid divide by
    zero, from Oliver Neukum.

 2) Disable global multicast filter in NCSI, otherwise LLDP and IPV6
    don't work properly. Longer term this needs a better fix tho. From
    Vijay Khemka.

 3) Small fixes to selftests (use ping when ping6 is not present, etc.)
    from David Ahern.

 4) Bring back rt_uses_gateway member of struct rtable, it's semantics
    were not well understood and trying to remove it broke things. From
    David Ahern.

 5) Move usbnet snaity checking, ignore endpoints with invalid
    wMaxPacketSize. From Bjørn Mork.

 6) Missing Kconfig deps for sja1105 driver, from Mao Wenan.

 7) Various small fixes to the mlx5 DR steering code, from Alaa Hleihel,
    Alex Vesker, and Yevgeny Kliteynik

 8) Missing CAP_NET_RAW checks in various places, from Ori Nimron.

 9) Fix crash when removing sch_cbs entry while offloading is enabled,
    from Vinicius Costa Gomes.

10) Signedness bug fixes, generally in looking at the result given by
    of_get_phy_mode() and friends. From Dan Crapenter.

11) Disable preemption around BPF_PROG_RUN() calls, from Eric Dumazet.

12) Don't create VRF ipv6 rules if ipv6 is disabled, from David Ahern.

13) Fix quantization code in tcp_bbr, from Kevin Yang.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (127 commits)
  net: tap: clean up an indentation issue
  nfp: abm: fix memory leak in nfp_abm_u32_knode_replace
  tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state
  sk_buff: drop all skb extensions on free and skb scrubbing
  tcp_bbr: fix quantization code to not raise cwnd if not probing bandwidth
  mlxsw: spectrum_flower: Fail in case user specifies multiple mirror actions
  Documentation: Clarify trap's description
  mlxsw: spectrum: Clear VLAN filters during port initialization
  net: ena: clean up indentation issue
  NFC: st95hf: clean up indentation issue
  net: phy: micrel: add Asym Pause workaround for KSZ9021
  net: socionext: ave: Avoid using netdev_err() before calling register_netdev()
  ptp: correctly disable flags on old ioctls
  lib: dimlib: fix help text typos
  net: dsa: microchip: Always set regmap stride to 1
  nfp: flower: fix memory leak in nfp_flower_spawn_vnic_reprs
  nfp: flower: prevent memory leak in nfp_flower_spawn_phy_reprs
  net/sched: Set default of CONFIG_NET_TC_SKB_EXT to N
  vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled
  net: sched: sch_sfb: don't call qdisc_put() while holding tree lock
  ...
      02dc96ef