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Date: Tue, 4 Nov 2014 08:05:35 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Al Viro <viro@...iv.linux.org.uk>,
Joe Perches <joe@...ches.com>,
Pablo Neira Ayuso <pablo@...filter.org>,
Patrick McHardy <kaber@...sh.net>,
Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
<netfilter-devel@...r.kernel.org>, <coreteam@...filter.org>
Subject: Re: [RFA][PATCH 2/8] netfilter: Remove return values for
print_conntrack callbacks
On Wed, 29 Oct 2014 17:56:04 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
>
> [ REQUEST FOR ACKS ]
Can any of the netfilter folks give me an Acked-by for this?
Thanks!
-- Steve
>
> The seq_printf() and friends are having their return values removed.
> The print_conntrack() returns the result of seq_printf(), which is
> meaningless when seq_printf() returns void. Might as well remove the
> return values of print_conntrack() as well.
>
> Cc: Pablo Neira Ayuso <pablo@...filter.org>
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
> Cc: netfilter-devel@...r.kernel.org
> Cc: coreteam@...filter.org
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
> include/net/netfilter/nf_conntrack_l4proto.h | 2 +-
> net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c | 5 ++++-
> net/netfilter/nf_conntrack_proto_dccp.c | 4 ++--
> net/netfilter/nf_conntrack_proto_gre.c | 8 ++++----
> net/netfilter/nf_conntrack_proto_sctp.c | 4 ++--
> net/netfilter/nf_conntrack_proto_tcp.c | 4 ++--
> net/netfilter/nf_conntrack_standalone.c | 4 ++--
> 7 files changed, 17 insertions(+), 14 deletions(-)
>
> diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
> index 4c8d573830b7..82e4ec002a39 100644
> --- a/include/net/netfilter/nf_conntrack_l4proto.h
> +++ b/include/net/netfilter/nf_conntrack_l4proto.h
> @@ -60,7 +60,7 @@ struct nf_conntrack_l4proto {
> const struct nf_conntrack_tuple *);
>
> /* Print out the private part of the conntrack. */
> - int (*print_conntrack)(struct seq_file *s, struct nf_conn *);
> + void (*print_conntrack)(struct seq_file *s, struct nf_conn *);
>
> /* Return the array of timeouts for this protocol. */
> unsigned int *(*get_timeouts)(struct net *net);
> diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
> index 4c48e434bb1f..91f207c2cb69 100644
> --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
> +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
> @@ -147,7 +147,10 @@ static int ct_seq_show(struct seq_file *s, void *v)
> ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
> goto release;
>
> - if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
> + if (l4proto->print_conntrack)
> + l4proto->print_conntrack(s, ct);
> +
> + if (seq_has_overflowed(s))
> goto release;
>
> if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
> diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
> index cb372f96f10d..15971177470a 100644
> --- a/net/netfilter/nf_conntrack_proto_dccp.c
> +++ b/net/netfilter/nf_conntrack_proto_dccp.c
> @@ -626,9 +626,9 @@ static int dccp_print_tuple(struct seq_file *s,
> ntohs(tuple->dst.u.dccp.port));
> }
>
> -static int dccp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> +static void dccp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> {
> - return seq_printf(s, "%s ", dccp_state_names[ct->proto.dccp.state]);
> + seq_printf(s, "%s ", dccp_state_names[ct->proto.dccp.state]);
> }
>
> #if IS_ENABLED(CONFIG_NF_CT_NETLINK)
> diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
> index d5665739e3b1..cba607ada069 100644
> --- a/net/netfilter/nf_conntrack_proto_gre.c
> +++ b/net/netfilter/nf_conntrack_proto_gre.c
> @@ -235,11 +235,11 @@ static int gre_print_tuple(struct seq_file *s,
> }
>
> /* print private data for conntrack */
> -static int gre_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> +static void gre_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> {
> - return seq_printf(s, "timeout=%u, stream_timeout=%u ",
> - (ct->proto.gre.timeout / HZ),
> - (ct->proto.gre.stream_timeout / HZ));
> + seq_printf(s, "timeout=%u, stream_timeout=%u ",
> + (ct->proto.gre.timeout / HZ),
> + (ct->proto.gre.stream_timeout / HZ));
> }
>
> static unsigned int *gre_get_timeouts(struct net *net)
> diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
> index 1314d33f6bcf..c61f4cd6407d 100644
> --- a/net/netfilter/nf_conntrack_proto_sctp.c
> +++ b/net/netfilter/nf_conntrack_proto_sctp.c
> @@ -175,7 +175,7 @@ static int sctp_print_tuple(struct seq_file *s,
> }
>
> /* Print out the private part of the conntrack. */
> -static int sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> +static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> {
> enum sctp_conntrack state;
>
> @@ -183,7 +183,7 @@ static int sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> state = ct->proto.sctp.state;
> spin_unlock_bh(&ct->lock);
>
> - return seq_printf(s, "%s ", sctp_conntrack_names[state]);
> + seq_printf(s, "%s ", sctp_conntrack_names[state]);
> }
>
> #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
> diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
> index 44d1ea32570a..79668fd3db96 100644
> --- a/net/netfilter/nf_conntrack_proto_tcp.c
> +++ b/net/netfilter/nf_conntrack_proto_tcp.c
> @@ -311,7 +311,7 @@ static int tcp_print_tuple(struct seq_file *s,
> }
>
> /* Print out the private part of the conntrack. */
> -static int tcp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> +static void tcp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> {
> enum tcp_conntrack state;
>
> @@ -319,7 +319,7 @@ static int tcp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> state = ct->proto.tcp.state;
> spin_unlock_bh(&ct->lock);
>
> - return seq_printf(s, "%s ", tcp_conntrack_names[state]);
> + seq_printf(s, "%s ", tcp_conntrack_names[state]);
> }
>
> static unsigned int get_conntrack_index(const struct tcphdr *tcph)
> diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
> index cf65a1e040dd..348aa3602787 100644
> --- a/net/netfilter/nf_conntrack_standalone.c
> +++ b/net/netfilter/nf_conntrack_standalone.c
> @@ -199,8 +199,8 @@ static int ct_seq_show(struct seq_file *s, void *v)
> ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
> goto release;
>
> - if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
> - goto release;
> + if (l4proto->print_conntrack)
> + l4proto->print_conntrack(s, ct);
>
> if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
> l3proto, l4proto))
--
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