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  1. 21 Jul, 2021 8 commits
    • Justin Iurman's avatar
      ipv6: ioam: Support for IOAM injection with lwtunnels · 3edede08
      Justin Iurman authored 
      Add support for the IOAM inline insertion (only for the host-to-host use case)
which is per-route configured with lightweight tunnels. The target is iproute2
and the patch is ready. It will be posted as soon as this patchset is merged.
Here is an overview:

$ ip -6 ro ad fc00::1/128 encap ioam6 trace type 0x800000 ns 1 size 12 dev eth0

This example configures an IOAM Pre-allocated Trace option attached to the
fc00::1/128 prefix. The IOAM namespace (ns) is 1, the size of the pre-allocated
trace data block is 12 octets (size) and only the first IOAM data (bit 0:
hop_limit + node id) is included in the trace (type) represented as a bitfield.

The reason why the in-transit (IPv6-in-IPv6 encapsulation) use case is not
implemented is explained on the patchset cover.
Signed-off-by: default avatarJustin Iurman <justin.iurman@uliege.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3edede08
    • Justin Iurman's avatar
      ipv6: ioam: IOAM Generic Netlink API · 8c6f6fa6
      Justin Iurman authored 
      Add Generic Netlink commands to allow userspace to configure IOAM
namespaces and schemas. The target is iproute2 and the patch is ready.
It will be posted as soon as this patchset is merged. Here is an overview:

$ ip ioam
Usage:	ip ioam { COMMAND | help }
	ip ioam namespace show
	ip ioam namespace add ID [ data DATA32 ] [ wide DATA64 ]
	ip ioam namespace del ID
	ip ioam schema show
	ip ioam schema add ID DATA
	ip ioam schema del ID
	ip ioam namespace set ID schema { ID | none }
Signed-off-by: default avatarJustin Iurman <justin.iurman@uliege.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8c6f6fa6
    • Justin Iurman's avatar
      ipv6: ioam: Data plane support for Pre-allocated Trace · 9ee11f0f
      Justin Iurman authored 
      Implement support for processing the IOAM Pre-allocated Trace with IPv6,
see [1] and [2]. Introduce a new IPv6 Hop-by-Hop TLV option, see IANA [3].

A new per-interface sysctl is introduced. The value is a boolean to accept (=1)
or ignore (=0, by default) IPv6 IOAM options on ingress for an interface:
 - net.ipv6.conf.XXX.ioam6_enabled

Two other sysctls are introduced to define IOAM IDs, represented by an integer.
They are respectively per-namespace and per-interface:
 - net.ipv6.ioam6_id
 - net.ipv6.conf.XXX.ioam6_id

The value of the first one represents the IOAM ID of the node itself (u32; max
and default value = U32_MAX>>8, due to hop limit concatenation) while the other
represents the IOAM ID of an interface (u16; max and default value = U16_MAX).

Each "ioam6_id" sysctl has a "_wide" equivalent:
 - net.ipv6.ioam6_id_wide
 - net.ipv6.conf.XXX.ioam6_id_wide

The value of the first one represents the wide IOAM ID of the node itself (u64;
max and default value = U64_MAX>>8, due to hop limit concatenation) while the
other represents the wide IOAM ID of an interface (u32; max and default value
= U32_MAX).

The use of short and wide equivalents is not exclusive, a deployment could
choose to leverage both. For example, net.ipv6.conf.XXX.ioam6_id (short format)
could be an identifier for a physical interface, whereas
net.ipv6.conf.XXX.ioam6_id_wide (wide format) could be an identifier for a
logical sub-interface. Documentation about new sysctls is provided at the end
of this patchset.

Two relativistic hash tables are used: one for IOAM namespaces, the other for
IOAM schemas. A namespace can only have a single active schema and a schema
can only be attached to a single namespace (1:1 relationship).

  [1] https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options
  [2] https://tools.ietf.org/html/draft-ietf-ippm-ioam-data
  [3] https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml#ipv6-parameters-2Signed-off-by: default avatarJustin Iurman <justin.iurman@uliege.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9ee11f0f
    • Justin Iurman's avatar
      uapi: IPv6 IOAM headers definition · db67f219
      Justin Iurman authored 
      This patch provides the IPv6 IOAM option header [1] as well as the IOAM
Trace header [2]. An IOAM option must be 4n-aligned. Here is an overview of
a Hop-by-Hop with an IOAM Trace option:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|  Next header  |  Hdr Ext Len  |    Padding    |    Padding    |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|  Option Type  |  Opt Data Len |    Reserved   |   IOAM Type   |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|         Namespace-ID          | NodeLen | Flags | RemainingLen|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                IOAM-Trace-Type                |    Reserved   |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<-+
|                                                               |  |
|                         node data [n]                         |  |
|                                                               |  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  D
|                                                               |  a
|                         node data [n-1]                       |  t
|                                                               |  a
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~                             ...                               ~  S
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  p
|                                                               |  a
|                         node data [1]                         |  c
|                                                               |  e
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  |
|                                                               |  |
|                         node data [0]                         |  |
|                                                               |  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<-+

The IOAM option header starts at "Option Type" and ends after "IOAM
Type". The IOAM Trace header starts at "Namespace-ID" and ends after
"IOAM-Trace-Type/Reserved".

IOAM Type: either Pre-allocated Trace (=0), Incremental Trace (=1),
Proof-of-Transit (=2) or Edge-to-Edge (=3). Note that both the
Pre-allocated Trace and the Incremental Trace look the same. The two
others are not implemented.

Namespace-ID: IOAM namespace identifier, not to be confused with network
namespaces. It adds further context to IOAM options and associated data,
and allows devices which are IOAM capable to determine whether IOAM
options must be processed or ignored. It can also be used by an operator
to distinguish different operational domains or to identify different
sets of devices.

NodeLen: Length of data added by each node. It depends on the Trace
Type.

Flags: Only the Overflow (O) flag for now. The O flag is set by a
transit node when there are not enough octets left to record its data.

RemainingLen: Remaining free space to record data.

IOAM-Trace-Type: Bit field where each bit corresponds to a specific kind
of IOAM data. See [2] for a detailed list.

  [1] https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options
  [2] https://tools.ietf.org/html/draft-ietf-ippm-ioam-dataSigned-off-by: default avatarJustin Iurman <justin.iurman@uliege.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      db67f219
    • Vladimir Oltean's avatar
      net: switchdev: recurse into __switchdev_handle_fdb_del_to_device · 71f4f89a
      Vladimir Oltean authored 
      The difference between __switchdev_handle_fdb_del_to_device and
switchdev_handle_del_to_device is that the former takes an extra
orig_dev argument, while the latter starts with dev == orig_dev.

We should recurse into the variant that does not lose the orig_dev along
the way. This is relevant when deleting FDB entries pointing towards a
bridge (dev changes to the lower interfaces, but orig_dev shouldn't).

The addition helper already recurses properly, just the deletion one
doesn't.

Fixes: 8ca07176 ("net: switchdev: introduce a fanout helper for SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE")
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      71f4f89a
    • Vladimir Oltean's avatar
      net: switchdev: remove stray semicolon in switchdev_handle_fdb_del_to_device shim · 94111dfc
      Vladimir Oltean authored 
      With the semicolon at the end, the compiler sees the shim function as a
declaration and not as a definition, and warns:

'switchdev_handle_fdb_del_to_device' declared 'static' but never defined
Reported-by: default avatarkernel test robot <lkp@intel.com>
Fixes: 8ca07176 ("net: switchdev: introduce a fanout helper for SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE")
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: default avatarMatthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      94111dfc
    • Vladimir Oltean's avatar
      net: phy: at803x: finish the phy id checking simplification · f5621a01
      Vladimir Oltean authored 
      The blamed commit was probably not tested on net-next, since it did not
refactor the extra phy id check introduced in commit b856150c ("net:
phy: at803x: mask 1000 Base-X link mode").

Fixes: 8887ca54 ("net: phy: at803x: simplify custom phy id matching")
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f5621a01
    • Russell King (Oracle)'s avatar
      net: phylink: cleanup ksettings_set · 7cefb0b0
      Russell King (Oracle) authored 
      We only need to fiddle about with the supported mask after we have
validated the user's requested parameters. Simplify and streamline the
code by moving the linkmode copy and update of the autoneg bit after
validating the user's request.
Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7cefb0b0
  3. 20 Jul, 2021 32 commits
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