Skip to content

L
linux
Switch branch/tag
  1. 16 Oct, 2018 20 commits
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: use for mcast entries only host port · 5b3a5a14
      Ivan Khoronzhuk authored 
      In dual-emac mode the cpsw driver sends directed packets, that means
that packets go to the directed port, but an ALE lookup is performed
to determine untagged egress only. It means that on tx side no need
to add port bit for ALE mcast entry mask, and basically ALE entry
for port identification is needed only on rx side.

So, add only host port in dual_emac mode as used directed
transmission, and no need in one more port. For single port boards
and switch mode all ports used, as usual, so no changes for them.
Also it simplifies farther changes.

In other words, mcast entries for dual-emac should behave exactly
like unicast. It also can help avoid leaking packets between ports
with same vlan on h/w level if ports could became members of same vid.

So now, for instance, if mcast address 33:33:00:00:00:01 is added then
entries in ALE table:

vid = 1, addr = 33:33:00:00:00:01, port_mask = 0x1
vid = 2, addr = 33:33:00:00:00:01, port_mask = 0x1

Instead of:
vid = 1, addr = 33:33:00:00:00:01, port_mask = 0x3
vid = 2, addr = 33:33:00:00:00:01, port_mask = 0x5

With the same considerations, set only host port for unregistered
mcast for dual-emac mode in case of IFF_ALLMULTI is set, exactly like
it's done in cpsw_ale_set_allmulti().
Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5b3a5a14
    • David S. Miller's avatar
      Merge branch 'net-ethernet-ti-cpsw-fix-mcast-packet-lost' · ba722f9b
      David S. Miller authored 
      Ivan Khoronzhuk says:

====================
net: ethernet: ti: cpsw fix mcast packet lost

The patchset omits redundant refresh of mcast address table and
prevents mcast packet lost.

Based on net-next/master
tested on am572x evm
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ba722f9b
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw: fix lost of mcast packets while rx_mode update · 5da19489
      Ivan Khoronzhuk authored 
      Whenever kernel or user decides to call rx mode update, it clears
every multicast entry from forwarding table and in some time adds
it again. This time can be enough to drop incoming multicast packets.

That's why clear only staled multicast entries and update or add new
one afterwards.
Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5da19489
    • Ivan Khoronzhuk's avatar
      net: ethernet: ti: cpsw_ale: use const for API having pointer on mac address · 58bdeac8
      Ivan Khoronzhuk authored 
      It allows to use function under callbacks with same const qualifier of
mac address for farther changes.
Signed-off-by: default avatarIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      58bdeac8
    • David S. Miller's avatar
      Merge branch 'net-phy-improve-and-simplify-state-machine' · 5985d563
      David S. Miller authored 
      Heiner Kallweit says:

====================
net: phy: improve and simplify state machine

Improve / simplify handling of states PHY_RUNNING and PHY_RESUMING in
phylib state machine.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5985d563
    • Heiner Kallweit's avatar
      net: phy: simplify handling of PHY_RESUMING in state machine · eb4c470a
      Heiner Kallweit authored 
      Simplify code for handling state PHY_RESUMING, no functional change
intended.
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      eb4c470a
    • Heiner Kallweit's avatar
      net: phy: improve handling of PHY_RUNNING in state machine · 74fb5e25
      Heiner Kallweit authored 
      Handling of state PHY_RUNNING seems to be more complex than it needs
to be. If not polling, then we don't have to do anything, we'll
receive an interrupt and go to state PHY_CHANGELINK once the link
goes down. If polling and link is down, we don't have to go the
extra mile over PHY_CHANGELINK and call phy_read_status() again
but can set status PHY_NOLINK directly.
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      74fb5e25
    • Roopa Prabhu's avatar
      vxlan: support NTF_USE refresh of fdb entries · 0813e957
      Roopa Prabhu authored 
      This makes use of NTF_USE in vxlan driver consistent
with bridge driver.
Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0813e957
    • Justin.Lee1@Dell.com's avatar
      net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI command · 9771b8cc
      Justin.Lee1@Dell.com authored 
      The new command (NCSI_CMD_SEND_CMD) is added to allow user space application
to send NC-SI command to the network card.
Also, add a new attribute (NCSI_ATTR_DATA) for transferring request and response.

The work flow is as below.

Request:
User space application
	-> Netlink interface (msg)
	-> new Netlink handler - ncsi_send_cmd_nl()
	-> ncsi_xmit_cmd()

Response:
Response received - ncsi_rcv_rsp()
	-> internal response handler - ncsi_rsp_handler_xxx()
	-> ncsi_rsp_handler_netlink()
	-> ncsi_send_netlink_rsp ()
	-> Netlink interface (msg)
	-> user space application

Command timeout - ncsi_request_timeout()
	-> ncsi_send_netlink_timeout ()
	-> Netlink interface (msg with zero data length)
	-> user space application

Error:
Error detected
	-> ncsi_send_netlink_err ()
	-> Netlink interface (err msg)
	-> user space application
Signed-off-by: default avatarJustin Lee <justin.lee1@dell.com>
Reviewed-by: default avatarSamuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9771b8cc
    • Heiner Kallweit's avatar
      net: phy: trigger state machine immediately in phy_start_machine · 6384e483
      Heiner Kallweit authored 
      When starting the state machine there may be work to be done
immediately, e.g. if the initial state is PHY_UP then the state
machine may trigger an autonegotiation. Having said that I see no need
to wait a second until the state machine is run first time.
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6384e483
    • David S. Miller's avatar
      Merge branch 'veth-XDP-stats-improvement' · a75d1801
      David S. Miller authored 
      Toshiaki Makita says:

====================
veth: XDP stats improvement

ndo_xdp_xmit in veth did not update packet counters as described in [1].
Also, current implementation only updates counters on tx side so rx side
events like XDP_DROP were not collected.
This series implements the missing accounting as well as support for
ethtool per-queue stats in veth.

Patch 1: Update drop counter in ndo_xdp_xmit.
Patch 2: Update packet and byte counters for all XDP path, and drop
         counter on XDP_DROP.
Patch 3: Support per-queue ethtool stats for XDP counters.

Note that counters are maintained on per-queue basis for XDP but not
otherwise (per-cpu and atomic as before). This is because 1) tx path in
veth is essentially lockless so we cannot update per-queue stats on tx,
and 2) rx path is net core routine (process_backlog) which cannot update
per-queue based stats when XDP is disabled. On the other hand there are
real rxqs and napi handlers for veth XDP, so update per-queue stats on
rx for XDP packets, and use them to calculate tx counters as well,
contrary to the existing non-XDP counters.

[1] https://patchwork.ozlabs.org/cover/953071/#1967449
====================
Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a75d1801
    • Toshiaki Makita's avatar
      veth: Add ethtool statistics support for XDP · d397b968
      Toshiaki Makita authored 
      Expose per-queue stats for ethtool -S.
As there are only rx queues, and rx queues are used only when XDP is
used, per-queue counters are only rx XDP ones.

Example:

$ ethtool -S veth0
NIC statistics:
     peer_ifindex: 11
     rx_queue_0_xdp_packets: 28601434
     rx_queue_0_xdp_bytes: 1716086040
     rx_queue_0_xdp_drops: 28601434
     rx_queue_1_xdp_packets: 17873050
     rx_queue_1_xdp_bytes: 1072383000
     rx_queue_1_xdp_drops: 17873050
Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d397b968
    • Toshiaki Makita's avatar
      veth: Account for XDP packet statistics on rx side · 4195e54a
      Toshiaki Makita authored 
      On XDP path veth has napi handler so we can collect statistics on
per-queue basis for XDP.

By this change now we can collect XDP_DROP drop count as well as packets
and bytes coming through ndo_xdp_xmit. Packet counters shown by
"ip -s link", sysfs stats or /proc/net/dev is now correct for XDP.
Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4195e54a
    • Toshiaki Makita's avatar
      veth: Account for packet drops in ndo_xdp_xmit · 2131479d
      Toshiaki Makita authored 
      Use existing atomic drop counter. Since drop path is really an
exceptional case here, I'm thinking atomic ops would not hurt the
performance.
XDP packets and bytes are not counted in ndo_xdp_xmit, but will be
accounted on rx side by the following commit.
Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2131479d
    • Hoang Le's avatar
      tipc: support binding to specific ip address when activating UDP bearer · acad76a5
      Hoang Le authored 
      INADDR_ANY is hard-coded when activating UDP bearer. So, we could not
bind to a specific IP address even with replicast mode using - given
remote ip address instead of using multicast ip address.

In this commit, we fixed it by checking and switch to use appropriate
local ip address.

before:
$netstat -plu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address
udp        0      0 **0.0.0.0:6118**            0.0.0.0:*

after:
$netstat -plu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address
udp        0      0 **10.0.0.2:6118**           0.0.0.0:*
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Acked-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarHoang Le <hoang.h.le@dektech.com.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      acad76a5
    • David S. Miller's avatar
      Merge tag 'mlx5e-updates-2018-10-10' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux · 1986647c
      David S. Miller authored 
      Saeed Mahameed says:

====================
mlx5e-updates-2018-10-10

IPoIB netlink support and mlx5e pre-allocated netdevice initialization

IP link was broken due to the changes in IPoIB for the rdma_netdev
support after commit cd565b4b
("IB/IPoIB: Support acceleration options callbacks").

This patchset fixes IPoIB pkey creation and removal using rtnetlink by
adding support in both IPoIB ULP layer and mlx5 layer:

From Jason and Denis:
1) Introduces changes in the RDMA netdev code in order to
   allow allocation of the netdev to be done by the rtnl netdev code.
2) Reworks IPoIB initialization to use the two step rdma_netdev
   creation.

From Feras and Saeed, mlx5e netdev layer refactoring to allow accepting
pre-allocated netdevs:
3) Adds support to initialize/cleanup netdevs that are not created
   by mlx5 driver.
4) Change mlx5e netdevice layer to accept the pre-allocated netdevice
   queue number.
5) Initialize mlx5e generic structures in one place to be used for all
   netdevs types NIC/representors/IPoIB (both mlx5 allocated and
   pre-allocted).
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1986647c
    • David S. Miller's avatar
      Merge branch 'defza-fddi' · 3325cf9e
      David S. Miller authored 
      Maciej W. Rozycki says:

====================
FDDI: DEC FDDIcontroller 700 TURBOchannel adapter support

 This is an update to <http://patchwork.ozlabs.org/patch/342737/>.  I
believe I have addressed all the requests made in the previous review
round.

 There is still one `checkpatch.pl' warning remaining:

WARNING: quoted string split across lines
+       pr_info("%s: ROM rev. %.4s, firmware rev. %.4s, RMC rev. %.4s, "
+               "SMT ver. %u\n", fp->name, rom_rev, fw_rev, rmc_rev, smt_ver);

total: 0 errors, 1 warnings, 2458 lines checked

however I think the value of staying within 80 columns is higher than the
value of having the string on a single line.  This is because with all the
formatting specifiers there it is not directly greppable based on the
final output produced to the kernel log on one hand, e.g.:

tc2: ROM rev. 1.0, firmware rev. 1.2, RMC rev. A, SMT ver. 1

while it can be easily tracked down by grepping for an obvious substring
such as "RMC rev" on the other.

 The issue with MMIO barriers I discussed in the course of the original
review turned out mostly irrelevant to this driver, because as I have
learnt in a recent Alpha/Linux discussion starting here:
<https://marc.info/?i=alpine.LRH.2.02.1808161556450.13597%20()%20file01%20!%20intranet%20!%20prod%20!%20int%20!%20rdu2%20!%20redhat%20!%20com>
our MMIO API mandates the `readX' and `writeX' accessors to be strongly
ordered with respect to each other, even if that is not implicitly
enforced by hardware.

 Consequently I have removed all the explicit ordering barriers and
instead submitted a fix for MIPS MMIO implementation, which currently does
not guarantee strong ordering (the MIPS architecture does not define bus
ordering rules except in terms of SYNC barriers), as recorded here:
<https://patchwork.linux-mips.org/project/linux-mips/list/?series=1538>.

 Enforcing strong MMIO ordering can be costly however and is often
unnecessary, e.g. when using PIO to access network frame data in onboard
packet memory.  I have therefore retained the information that would be
lost by the removal of barriers, by defining accessor wrappers suffixed by
`_o' and `_u', for accesses that have to be ordered and can be unordered
respectively.

 If we ever have an API defined for weakly-ordered MMIO accesses, then
these wrappers can be redefined accordingly.  Right now they all expand to
the respective `_relaxed' accessors, because, again, enforcing the
ordering WRT DMA transfers can be costly and we don't need it here except
in one place, where I chose to use explicit `dma_rmb' instead.

 Similarly I have replaced the completion barriers with a read back from
the respective MMIO location (all adapter MMIO registers can be read with
no side effects incurred), which will serve its purpose on the basis of
MMIO being strongly ordered (although a read from TURBOchannel is going to
be slower than `iob', making the delay incurred unnecessarily longer).

 And last but not least, I have split off the SMT Tx network tap support
to a separate change, 2/2 in this series, so that it does not block the
driver proper and can be discussed separately.

 I think it has value in that it makes the view of the outgoing network
traffic complete, as if one actually physically tapped into the outgoing
line of the ring, between the station being examined and its downstream
neighbour.  Without this part only traffic passed from applications
through the whole protocol stack can be captured and this is only a part
of the view.

 With the `dev_queue_xmit_nit' interface now exported it's only
`ptype_all' that remains private, and to define a properly abstracted API
I propose to provide am exported `dev_nit_active' predicate that tells
whether any taps are active.  This predicate is then used accordingly.

 NB if there is a long-term maintenance concern about the `dev_nit_active'
predicate, then well, corresponding inline code currently present in
`xmit_one' has to be maintained anyway, and if the resulting changes
require `defza' to be updated accordingly, then I am going to handle it;
after some 20 years with Linux it's not that I am going to disappear
anywhere anytime.  And once I am dead, which is inevitably going to happen
sooner or later, then the driver can simply be ripped from the kernel.
Though I suspect that at that point no DECstation Linux users may survive
anymore, even though hardware, being as sturdy as it is, likely will.

 I have a patch for `tcpdump' to actually decode SMT frames, which I plan
to upstream sometime.  Here's a sample of SMT traffic captured through the
`defza' driver in a small network of 4 stations and no concentrators,
printed in the most verbose mode:

01:16:59.138381 4f 00:60:b0:58:41:e7 00:60:b0:58:41:e7 73: SMT NIF ann vid:1 tid:00000270 sid:00-00-00-60-b0-58-41-e7 len:40: UNA: 00 00 00 06 0d 1a 02 ae StationDescr: 00 01 02 00 StationState: 00 00 30 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:00.332750 4f 08:00:2b:a3:a3:29 08:00:2b:a3:a3:29 73: SMT NIF ann vid:1 tid:0000013b sid:00-00-08-00-2b-a3-a3-29 len:40: UNA: 00 00 00 06 0d 1a 82 e7 StationDescr: 00 01 02 00 StationState: 00 00 30 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:00.354479 4f 00:60:b0:58:40:75 00:60:b0:58:40:75 73: SMT NIF ann vid:1 tid:0000029c sid:00-00-00-60-b0-58-40-75 len:40: UNA: 00 00 10 00 d4 74 b6 ae StationDescr: 00 01 02 00 StationState: 00 00 31 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:00.442175 4f 00:60:b0:58:41:e7 Broadcast 73: SMT NIF req vid:1 tid:00000271 sid:00-00-00-60-b0-58-41-e7 len:40: UNA: 00 00 00 06 0d 1a 02 ae StationDescr: 00 01 02 00 StationState: 00 00 30 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:00.448657 41 08:00:2b:a3:a3:29 00:60:b0:58:41:e7 73: SMT NIF rsp vid:1 tid:00000271 sid:00-00-08-00-2b-a3-a3-29 len:40: UNA: 00 00 00 06 0d 1a 82 e7 StationDescr: 00 01 02 00 StationState: 00 00 30 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:01.015152 4f 08:00:2b:a3:a3:29 Broadcast 73: SMT NIF req vid:1 tid:0000013c sid:00-00-08-00-2b-a3-a3-29 len:40: UNA: 00 00 00 06 0d 1a 82 e7 StationDescr: 00 01 02 00 StationState: 00 00 30 00 MACFrameStatusFunctions.3: 00 00 00 01
01:17:01.111644 41 08:00:2b:2e:6d:75 08:00:2b:a3:a3:29 73: SMT NIF rsp vid:1 tid:0000013c sid:00-00-08-00-2b-2e-6d-75 len:40: UNA: 00 00 10 00 d4 c5 c5 94 StationDescr: 00 01 01 00 StationState: 00 00 11 00 MACFrameStatusFunctions.2: 00 00 00 01
01:17:04.814603 4f 08:00:2b:2e:6d:75 Broadcast 73: SMT NIF req vid:1 tid:0000013c sid:00-00-08-00-2b-2e-6d-75 len:40: UNA: 00 00 10 00 d4 c5 c5 94 StationDescr: 00 01 01 00 StationState: 00 00 11 00 MACFrameStatusFunctions.2: 00 00 00 01
01:17:04.814939 4f 08:00:2b:2e:6d:75 Broadcast 73: SMT NIF req vid:1 tid:0000013c sid:00-00-08-00-2b-2e-6d-75 len:40: UNA: 00 00 10 00 d4 c5 c5 94 StationDescr: 00 01 01 00 StationState: 00 00 11 00 MACFrameStatusFunctions.2: 00 00 00 01
01:17:04.820960 4f 08:00:2b:2e:6d:75 08:00:2b:2e:6d:75 73: SMT NIF ann vid:1 tid:0000013b sid:00-00-08-00-2b-2e-6d-75 len:40: UNA: 00 00 10 00 d4 c5 c5 94 StationDescr: 00 01 01 00 StationState: 00 00 11 00 MACFrameStatusFunctions.2: 00 00 00 01

 Questions, comments?  Otherwise, please apply.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3325cf9e
    • Maciej W. Rozycki's avatar
      FDDI: defza: Support capturing outgoing SMT traffic · 9f9a742d
      Maciej W. Rozycki authored 
      DEC FDDIcontroller 700 (DEFZA) uses a Tx/Rx queue pair to communicate
SMT frames with adapter's firmware.  Any SMT frame received from the RMC
via the Rx queue is queued back by the driver to the SMT Rx queue for
the firmware to process.  Similarly the firmware uses the SMT Tx queue
to supply the driver with SMT frames which are queued back to the Tx
queue for the RMC to send to the ring.

When a network tap is attached to an FDDI interface handled by `defza'
any incoming SMT frames captured are queued to our usual processing of
network data received, which in turn delivers them to any listening
taps.

However the outgoing SMT frames produced by the firmware bypass our
network protocol stack and are therefore not delivered to taps.  This in
turn means that taps are missing a part of network traffic sent by the
adapter, which may make it more difficult to track down network problems
or do general traffic analysis.

Call `dev_queue_xmit_nit' then in the SMT Tx path, having checked that
a network tap is attached, with a newly-created `dev_nit_active' helper
wrapping the usual condition used in the transmit path.
Signed-off-by: default avatarMaciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9f9a742d
    • Maciej W. Rozycki's avatar
      FDDI: defza: Add support for DEC FDDIcontroller 700 TURBOchannel adapter · 61414f5e
      Maciej W. Rozycki authored 
      Add support for the DEC FDDIcontroller 700 (DEFZA), Digital Equipment
Corporation's first-generation FDDI network interface adapter, made for
TURBOchannel and based on a discrete version of what eventually became
Motorola's widely used CAMEL chipset.

The CAMEL chipset is present for example in the DEC FDDIcontroller
TURBOchannel, EISA and PCI adapters (DEFTA/DEFEA/DEFPA) that we support
with the `defxx' driver, however the host bus interface logic and the
firmware API are different in the DEFZA and hence a separate driver is
required.

There isn't much to say about the driver except that it works, but there
is one peculiarity to mention.  The adapter implements two Tx/Rx queue
pairs.

Of these one pair is the usual network Tx/Rx queue pair, in this case
used by the adapter to exchange frames with the ring, via the RMC (Ring
Memory Controller) chip.  The Tx queue is handled directly by the RMC
chip and resides in onboard packet memory.  The Rx queue is maintained
via DMA in host memory by adapter's firmware copying received data
stored by the RMC in onboard packet memory.

The other pair is used to communicate SMT frames with adapter's
firmware.  Any SMT frame received from the RMC via the Rx queue must be
queued back by the driver to the SMT Rx queue for the firmware to
process.  Similarly the firmware uses the SMT Tx queue to supply the
driver with SMT frames that must be queued back to the Tx queue for the
RMC to send to the ring.

This solution was chosen because the designers ran out of PCB space and
could not squeeze in more logic onto the board that would be required to
handle this SMT frame traffic without the need to involve the driver, as
with the later DEFTA/DEFEA/DEFPA adapters.

Finally the driver does some Frame Control byte decoding, so to avoid
magic numbers some macros are added to <linux/if_fddi.h>.
Signed-off-by: default avatarMaciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      61414f5e
    • Serhey Popovych's avatar
      tun: Consistently configure generic netdev params via rtnetlink · df52eab2
      Serhey Popovych authored 
      Configuring generic network device parameters on tun will fail in
presence of IFLA_INFO_KIND attribute in IFLA_LINKINFO nested attribute
since tun_validate() always return failure.

This can be visualized with following ip-link(8) command sequences:

  # ip link set dev tun0 group 100
  # ip link set dev tun0 group 100 type tun
  RTNETLINK answers: Invalid argument

with contrast to dummy and veth drivers:

  # ip link set dev dummy0 group 100
  # ip link set dev dummy0 type dummy

  # ip link set dev veth0 group 100
  # ip link set dev veth0 group 100 type veth

Fix by returning zero in tun_validate() when @data is NULL that is
always in case since rtnl_link_ops->maxtype is zero in tun driver.

Fixes: f019a7a5 ("tun: Implement ip link del tunXXX")
Signed-off-by: default avatarSerhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      df52eab2
  3. 14 Oct, 2018 3 commits
  5. 13 Oct, 2018 17 commits
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7