net/ipv4: Move call_fib_entry_notifiers up for new routes

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Move call to call_fib_entry_notifiers for new IPv4 routes to right
before the call to fib_insert_alias. At this point the only remaining
failure path is memory allocations in fib_insert_node. Handle that
very unlikely failure with a call to call_fib_entry_notifiers to
tell drivers about it.

At this point notifier handlers can decide the fate of the new route
with a clean path to delete the potential new entry if the notifier
returns non-0.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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David Ahern 2018-03-27 18:21:57 -07:00 • committed by David S. Miller

parent 9776d32537

commit 6635f311ea

1 changed files with 16 additions and 2 deletions

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net/ipv4/fib_trie.c

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