From: Jiri Pirko <j...@mellanox.com> Ido says:
In kernel 4.9 the switchdev-specific FIB offload mechanism was replaced by a new FIB notification chain to which modules could register in order to be notified about the addition and deletion of FIB entries. The motivation for this change was that switchdev drivers need to be able to reflect the entire FIB table and not only FIBs configured on top of the port netdevs themselves. This is useful in case of in-band management. The fundamental problem with this approach is that upon registration listeners lose all the information previously sent in the chain and thus have an incomplete view of the FIB tables, which can result in packet loss. This patchset fixes that by introducing a new API to dump the FIB tables. The entire dump process is done under RCU and thus the FIB notification chain is converted to be atomic. The listeners are modified accordingly. This is done in the first five patches. The sixth patch adds the dump callback itself and the next patches call it from current listeners of the FIB notification chain. Ido Schimmel (8): ipv4: fib: Export free_fib_info() mlxsw: spectrum_router: Implement FIB offload in delayed work rocker: Implement FIB offload in delayed work ipv4: fib: Convert FIB notification chain to be atomic net: ipv4: Send notifications only after removing FIB alias ipv4: fib: Add an API to request a FIB dump mlxsw: spectrum_router: Request a dump of FIB tables during init rocker: Request a dump of FIB tables during init drivers/net/ethernet/mellanox/mlxsw/core.c | 6 + drivers/net/ethernet/mellanox/mlxsw/core.h | 1 + .../net/ethernet/mellanox/mlxsw/spectrum_router.c | 73 ++++++++++-- drivers/net/ethernet/rocker/rocker_main.c | 59 ++++++++-- drivers/net/ethernet/rocker/rocker_ofdpa.c | 1 + include/net/ip_fib.h | 1 + net/ipv4/fib_semantics.c | 1 + net/ipv4/fib_trie.c | 128 +++++++++++++++++++-- 8 files changed, 242 insertions(+), 28 deletions(-) -- 2.7.4
