1. 16 Jan, 2020 17 commits
  2. 15 Jan, 2020 23 commits
    • Jacob Keller's avatar
      devlink: fix typos in qed documentation · 1ccf6c13
      Jacob Keller authored
      Review of the recently added documentation file for the qed driver
      noticed a couple of typos. Fix them now.
      Noticed-by: default avatarMichal Kalderon <mkalderon@marvell.com>
      Fixes: 0f261c3c ("devlink: add a driver-specific file for the qed driver")
      Signed-off-by: default avatarJacob Keller <jacob.e.keller@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1ccf6c13
    • Ulrich Weber's avatar
      pptp: support sockets bound to an interface · 43d28c61
      Ulrich Weber authored
      use sk_bound_dev_if for route lookup as already done
      in most of the other ip_route_output_ports() calls.
      
      Since most PPPoA providers use 10.0.0.138 as default gateway IP
      this will allow connections to multiple PPTP providers with the
      same IP address over different interfaces.
      Signed-off-by: default avatarUlrich Weber <ulrich.weber@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      43d28c61
    • David S. Miller's avatar
      Merge tag 'batadv-next-for-davem-20200114' of git://git.open-mesh.org/linux-merge · 8fec380a
      David S. Miller authored
      Simon Wunderlich says:
      
      ====================
      This feature/cleanup patchset includes the following patches:
      
       - bump version strings, by Simon Wunderlich
      
       - fix typo and kerneldocs, by Sven Eckelmann
      
       - use WiFi txbitrate for B.A.T.M.A.N. V as fallback, by René Treffer
      
       - silence some endian sparse warnings by adding annotations,
         by Sven Eckelmann
      
       - Update copyright years to 2020, by Sven Eckelmann
      
       - Disable deprecated sysfs configuration by default, by Sven Eckelmann
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8fec380a
    • David S. Miller's avatar
      Merge branch 'bridge-add-vlan-notifications-and-rtm-support' · 4e2fa6b9
      David S. Miller authored
      Nikolay Aleksandrov says:
      
      ====================
      net: bridge: add vlan notifications and rtm support
      
      This patch-set is a prerequisite for adding per-vlan options support
      because we need to be able to send vlan-only notifications and do larger
      vlan netlink dumps. Per-vlan options are needed as we move the control
      more to vlans and would like to add per-vlan state (needed for per-vlan
      STP and EVPN), per-vlan multicast options and control, and I'm sure
      there would be many more per-vlan options coming.
      Now we create/delete/dump vlans with the device AF_SPEC attribute which is
      fine since we support vlan ranges or use a compact bridge_vlan_info
      structure, but that cannot really be extended to support per-vlan options
      well. The biggest issue is dumping them - we tried using the af_spec with
      a new vlan option attribute but that led to insufficient message size
      quickly, also another minor problem with that is we have to dump all vlans
      always when notifying which, with options present, can be huge if they have
      different options set, so we decided to add new rtm message types
      specifically for vlans and register handlers for them and a new bridge vlan
      notification nl group for vlan-only notifications.
      The new RTM NEW/DEL/GETVLAN types introduced match the current af spec
      bridge functionality and in fact use the same helpers.
      The new nl format is:
       [BRIDGE_VLANDB_ENTRY]
          [BRIDGE_VLANDB_ENTRY_INFO] - bridge_vlan_info (either 1 vlan or
                                                         range start)
          [BRIDGE_VLANDB_ENTRY_RANGE] - range end
      
      This allows to encapsulate a range in a single attribute and also to
      create vlans and immediately set options on all of them with a single
      attribute. The GETVLAN dump can span multiple messages and dump all the
      necessary information. The vlan-only notifications are sent on
      NEW/DELVLAN events or when vlan options change (currently only flags),
      we try hard to compress the vlans into ranges in the notifications as
      well. When the per-vlan options are added we'll add helpers to check for
      option equality between neighbor vlans and will keep compressing them
      when possible.
      
      Note patch 02 is not really required, it's just a nice addition to have
      human-readable error messages from the different vlan checks.
      
      iproute2 changes and selftests will be sent with the next set which adds
      the first per-vlan option - per-vlan state similar to the port state.
      
      v2: changed patch 03 and patch 04 to use nlmsg_parse() in order to
          strictly validate the msg and make sure there are no remaining bytes
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4e2fa6b9
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: notify on vlan add/delete/change flags · f545923b
      Nikolay Aleksandrov authored
      Now that we can notify, send a notification on add/del or change of flags.
      Notifications are also compressed when possible to reduce their number
      and relieve user-space of extra processing, due to that we have to
      manually notify after each add/del in order to avoid double
      notifications. We try hard to notify only about the vlans which actually
      changed, thus a single command can result in multiple notifications
      about disjoint ranges if there were vlans which didn't change inside.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f545923b
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add rtnetlink group and notify support · cf5bddb9
      Nikolay Aleksandrov authored
      Add a new rtnetlink group for bridge vlan notifications - RTNLGRP_BRVLAN
      and add support for sending vlan notifications (both single and ranges).
      No functional changes intended, the notification support will be used by
      later patches.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cf5bddb9
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add rtm range support · 0ab55879
      Nikolay Aleksandrov authored
      Add a new vlandb nl attribute - BRIDGE_VLANDB_ENTRY_RANGE which causes
      RTM_NEWVLAN/DELVAN to act on a range. Dumps now automatically compress
      similar vlans into ranges. This will be also used when per-vlan options
      are introduced and vlans' options match, they will be put into a single
      range which is encapsulated in one netlink attribute. We need to run
      similar checks as br_process_vlan_info() does because these ranges will
      be used for options setting and they'll be able to skip
      br_process_vlan_info().
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0ab55879
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add del rtm message support · adb3ce9b
      Nikolay Aleksandrov authored
      Adding RTM_DELVLAN support similar to RTM_NEWVLAN is simple, just need to
      map DELVLAN to DELLINK and register the handler.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      adb3ce9b
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add new rtm message support · f26b2965
      Nikolay Aleksandrov authored
      Add initial RTM_NEWVLAN support which can only create vlans, operating
      similar to the current br_afspec(). We will use it later to also change
      per-vlan options. Old-style (flag-based) vlan ranges are not allowed
      when using RTM messages, we will introduce vlan ranges later via a new
      nested attribute which would allow us to have all the information about a
      range encapsulated into a single nl attribute.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f26b2965
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add rtm definitions and dump support · 8dcea187
      Nikolay Aleksandrov authored
      This patch adds vlan rtm definitions:
       - NEWVLAN: to be used for creating vlans, setting options and
         notifications
       - DELVLAN: to be used for deleting vlans
       - GETVLAN: used for dumping vlan information
      
      Dumping vlans which can span multiple messages is added now with basic
      information (vid and flags). We use nlmsg_parse() to validate the header
      length in order to be able to extend the message with filtering
      attributes later.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8dcea187
    • Nikolay Aleksandrov's avatar
      net: bridge: netlink: add extack error messages when processing vlans · 8f4cc940
      Nikolay Aleksandrov authored
      Add extack messages on vlan processing errors. We need to move the flags
      missing check after the "last" check since we may have "last" set but
      lack a range end flag in the next entry.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8f4cc940
    • Nikolay Aleksandrov's avatar
      net: bridge: vlan: add helpers to check for vlan id/range validity · 5a46facb
      Nikolay Aleksandrov authored
      Add helpers to check if a vlan id or range are valid. The range helper
      must be called when range start or end are detected.
      Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5a46facb
    • David S. Miller's avatar
      Merge branch 'net-Add-route-offload-indication' · f6310b61
      David S. Miller authored
      Ido Schimmel says:
      
      ====================
      net: Add route offload indication
      
      This patch set adds offload indication to IPv4 and IPv6 routes. So far
      offload indication was only available for the nexthop via
      'RTNH_F_OFFLOAD', which is problematic as a nexthop is usually shared
      between multiple routes.
      
      Based on feedback from Roopa and David on the RFC [1], the indication is
      split to 'offload' and 'trap'. This is done because not all the routes
      present in hardware actually offload traffic from the kernel. For
      example, host routes merely trap packets to the kernel. The two flags
      are dumped to user space via the 'rtm_flags' field in the ancillary
      header of the rtnetlink message.
      
      In addition, the patch set uses the new flags in order to test the FIB
      offload API by adding a dummy FIB offload implementation to netdevsim.
      The new tests are added to a shared library and can be therefore shared
      between different drivers.
      
      Patches #1-#3 add offload indication to IPv4 routes.
      Patches #4 adds offload indication to IPv6 routes.
      Patches #5-#6 add support for the offload indication in mlxsw.
      Patch #7 adds dummy FIB offload implementation in netdevsim.
      Patches #8-#10 add selftests.
      
      v2 (feedback from David Ahern):
      * Patch #2: Name last argument of fib_dump_info()
      * Patch #2: Move 'struct fib_rt_info' to include/net/ip_fib.h so that it
        could later be passed to fib_alias_hw_flags_set()
      * Patch #3: Make use of 'struct fib_rt_info' in fib_alias_hw_flags_set()
      * Patch #6: Convert to new fib_alias_hw_flags_set() interface
      * Patch #7: Convert to new fib_alias_hw_flags_set() interface
      
      [1] https://patchwork.ozlabs.org/cover/1170530/
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f6310b61
    • Ido Schimmel's avatar
      selftests: mlxsw: Add test for FIB offload API · 212a37c2
      Ido Schimmel authored
      The test reuses the common FIB offload tests in order to make sure that
      mlxsw correctly implements FIB offload.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      212a37c2
    • Ido Schimmel's avatar
      selftests: netdevsim: Add test for FIB offload API · ffdc5149
      Ido Schimmel authored
      Test various aspects of the FIB offload API on top of the netdevsim
      implementation. Both good and bad flows are tested.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ffdc5149
    • Ido Schimmel's avatar
      selftests: forwarding: Add helpers and tests for FIB offload · c662455b
      Ido Schimmel authored
      Implement a set of common helpers and tests for FIB offload that can be
      used by multiple drivers to check their FIB offload implementations.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c662455b
    • Ido Schimmel's avatar
      netdevsim: fib: Add dummy implementation for FIB offload · 48bb9eb4
      Ido Schimmel authored
      Implement dummy IPv4 and IPv6 FIB "offload" in the driver by storing
      currently "programmed" routes in a hash table. Each route in the hash
      table is marked with "trap" indication. The indication is cleared when
      the route is replaced or when the netdevsim instance is deleted.
      
      This will later allow us to test the route offload API on top of
      netdevsim.
      
      v2:
      * Convert to new fib_alias_hw_flags_set() interface
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      48bb9eb4
    • Ido Schimmel's avatar
      mlxsw: spectrum_router: Set hardware flags for routes · ee5a0448
      Ido Schimmel authored
      Previous patches added support for two hardware flags for IPv4 and IPv6
      routes: 'RTM_F_OFFLOAD' and 'RTM_F_TRAP'. Both indicate the presence of
      the route in hardware. The first indicates that traffic is actually
      offloaded from the kernel, whereas the second indicates that packets
      hitting such routes are trapped to the kernel for processing (e.g., host
      routes).
      
      Use these two flags in mlxsw. The flags are modified in two places.
      Firstly, whenever a route is updated in the device's table. This
      includes the addition, deletion or update of a route. For example, when
      a host route is promoted to perform NVE decapsulation, its action in the
      device is updated, the 'RTM_F_OFFLOAD' flag set and the 'RTM_F_TRAP'
      flag cleared.
      
      Secondly, when a route is replaced and overwritten by another route, its
      flags are cleared.
      
      v2:
      * Convert to new fib_alias_hw_flags_set() interface
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ee5a0448
    • Ido Schimmel's avatar
      mlxsw: spectrum_router: Separate nexthop offload indication from route · 8c5a5b9b
      Ido Schimmel authored
      The driver currently uses the 'RTNH_F_OFFLOAD' flag for both routes and
      nexthops, which is cumbersome and unnecessary now that we have separate
      flag for the route itself.
      
      Separate the offload indication for nexthops from routes and call it
      whenever the offload state within the nexthop group changes.
      
      Note that IPv6 (unlike IPv4) does not share the same nexthop group
      between different routes, whereas mlxsw does. Therefore, whenever the
      offload indication within an IPv6 nexthop group changes, all the linked
      routes need to be updated.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8c5a5b9b
    • Ido Schimmel's avatar
      ipv6: Add "offload" and "trap" indications to routes · bb3c4ab9
      Ido Schimmel authored
      In a similar fashion to previous patch, add "offload" and "trap"
      indication to IPv6 routes.
      
      This is done by using two unused bits in 'struct fib6_info' to hold
      these indications. Capable drivers are expected to set these when
      processing the various in-kernel route notifications.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Acked-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bb3c4ab9
    • Ido Schimmel's avatar
      ipv4: Add "offload" and "trap" indications to routes · 90b93f1b
      Ido Schimmel authored
      When performing L3 offload, routes and nexthops are usually programmed
      into two different tables in the underlying device. Therefore, the fact
      that a nexthop resides in hardware does not necessarily mean that all
      the associated routes also reside in hardware and vice-versa.
      
      While the kernel can signal to user space the presence of a nexthop in
      hardware (via 'RTNH_F_OFFLOAD'), it does not have a corresponding flag
      for routes. In addition, the fact that a route resides in hardware does
      not necessarily mean that the traffic is offloaded. For example,
      unreachable routes (i.e., 'RTN_UNREACHABLE') are programmed to trap
      packets to the CPU so that the kernel will be able to generate the
      appropriate ICMP error packet.
      
      This patch adds an "offload" and "trap" indications to IPv4 routes, so
      that users will have better visibility into the offload process.
      
      'struct fib_alias' is extended with two new fields that indicate if the
      route resides in hardware or not and if it is offloading traffic from
      the kernel or trapping packets to it. Note that the new fields are added
      in the 6 bytes hole and therefore the struct still fits in a single
      cache line [1].
      
      Capable drivers are expected to invoke fib_alias_hw_flags_set() with the
      route's key in order to set the flags.
      
      The indications are dumped to user space via a new flags (i.e.,
      'RTM_F_OFFLOAD' and 'RTM_F_TRAP') in the 'rtm_flags' field in the
      ancillary header.
      
      v2:
      * Make use of 'struct fib_rt_info' in fib_alias_hw_flags_set()
      
      [1]
      struct fib_alias {
              struct hlist_node  fa_list;                      /*     0    16 */
              struct fib_info *          fa_info;              /*    16     8 */
              u8                         fa_tos;               /*    24     1 */
              u8                         fa_type;              /*    25     1 */
              u8                         fa_state;             /*    26     1 */
              u8                         fa_slen;              /*    27     1 */
              u32                        tb_id;                /*    28     4 */
              s16                        fa_default;           /*    32     2 */
              u8                         offload:1;            /*    34: 0  1 */
              u8                         trap:1;               /*    34: 1  1 */
              u8                         unused:6;             /*    34: 2  1 */
      
              /* XXX 5 bytes hole, try to pack */
      
              struct callback_head rcu __attribute__((__aligned__(8))); /*    40    16 */
      
              /* size: 56, cachelines: 1, members: 12 */
              /* sum members: 50, holes: 1, sum holes: 5 */
              /* sum bitfield members: 8 bits (1 bytes) */
              /* forced alignments: 1, forced holes: 1, sum forced holes: 5 */
              /* last cacheline: 56 bytes */
      } __attribute__((__aligned__(8)));
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      90b93f1b
    • Ido Schimmel's avatar
      ipv4: Encapsulate function arguments in a struct · 1e301fd0
      Ido Schimmel authored
      fib_dump_info() is used to prepare RTM_{NEW,DEL}ROUTE netlink messages
      using the passed arguments. Currently, the function takes 11 arguments,
      6 of which are attributes of the route being dumped (e.g., prefix, TOS).
      
      The next patch will need the function to also dump to user space an
      indication if the route is present in hardware or not. Instead of
      passing yet another argument, change the function to take a struct
      containing the different route attributes.
      
      v2:
      * Name last argument of fib_dump_info()
      * Move 'struct fib_rt_info' to include/net/ip_fib.h so that it could
        later be passed to fib_alias_hw_flags_set()
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1e301fd0
    • Ido Schimmel's avatar
      ipv4: Replace route in list before notifying · 6324d0fa
      Ido Schimmel authored
      Subsequent patches will add an offload / trap indication to routes which
      will signal if the route is present in hardware or not.
      
      After programming the route to the hardware, drivers will have to ask
      the IPv4 code to set the flags by passing the route's key.
      
      In the case of route replace, the new route is notified before it is
      actually inserted into the FIB alias list. This can prevent simple
      drivers (e.g., netdevsim) that program the route to the hardware in the
      same context it is notified in from being able to set the flag.
      
      Solve this by first inserting the new route to the list and rollback the
      operation in case the route was vetoed.
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
      Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6324d0fa