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Message-ID: <20181011155630.GG5708@lunn.ch>
Date: Thu, 11 Oct 2018 17:56:30 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Ahern <dsahern@...nel.org>
Cc: netdev@...r.kernel.org, davem@...emloft.net,
David Ahern <dsahern@...il.com>
Subject: Re: [PATCH net-next 2/9] net/ipv4: Plumb support for filtering route
dumps
> @@ -866,10 +866,13 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
> hlist_for_each_entry_rcu(tb, head, tb_hlist) {
> if (e < s_e)
> goto next;
> + if (filter.table_id && filter.table_id != tb->tb_id)
> + goto next;
> +
Hi David
Should there be a test here that filter->filter_set is set, before
looking at filter.table_id.
> if (dumped)
> memset(&cb->args[2], 0, sizeof(cb->args) -
> 2 * sizeof(cb->args[0]));
> - err = fib_table_dump(tb, skb, cb);
> + err = fib_table_dump(tb, skb, cb, &filter);
> if (err < 0) {
> if (likely(skb->len))
> goto out;
> diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
> index 5bc0c89e81e4..237c9f72b265 100644
> --- a/net/ipv4/fib_trie.c
> +++ b/net/ipv4/fib_trie.c
> @@ -2003,12 +2003,17 @@ void fib_free_table(struct fib_table *tb)
> }
>
> static int fn_trie_dump_leaf(struct key_vector *l, struct fib_table *tb,
> - struct sk_buff *skb, struct netlink_callback *cb)
> + struct sk_buff *skb, struct netlink_callback *cb,
> + struct fib_dump_filter *filter)
> {
> + unsigned int flags = NLM_F_MULTI;
> __be32 xkey = htonl(l->key);
> struct fib_alias *fa;
> int i, s_i;
>
> + if (filter->filter_set)
> + flags |= NLM_F_DUMP_FILTERED;
With the above code, it seems like table_id could be filtered without
setting this flag to indicate some filters have been applied?
Andrew
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