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net/ipv4: Allow notifier to fail route replace 

Add checking to call to call_fib_entry_notifiers for IPv4 route replace.
Allows a notifier handler to fail the replace.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2018-03-27 18:21:58 -07:00 committed by David S. Miller
parent 6635f311ea
commit c1d7ee67ac
1 changed files with 7 additions and 2 deletions
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net/ipv4/fib_trie.c
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@ -1219,8 +1219,13 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
new_fa->tb_id = tb->tb_id;
new_fa->fa_default = -1;
call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_REPLACE,
key, plen, new_fa, extack);
err = call_fib_entry_notifiers(net,
FIB_EVENT_ENTRY_REPLACE,
key, plen, new_fa,
extack);
if (err)
goto out_free_new_fa;
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen,
tb->tb_id, &cfg->fc_nlinfo, nlflags);