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Date: Tue, 30 Sep 2014 12:22:21 +0200
From: Petr Mladek <pmladek@...e.cz>
To: Joe Perches <joe@...ches.com>
Cc: Steven Rostedt <rostedt@...dmis.org>,
Al Viro <viro@...IV.linux.org.uk>,
Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Pablo Neira Ayuso <pablo@...filter.org>,
Patrick McHardy <kaber@...sh.net>,
Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
"David S. Miller" <davem@...emloft.net>,
netfilter-devel@...r.kernel.org, coreteam@...filter.org,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] netfilter: Convert print_tuple functions to return
void
On Mon 29-09-14 16:08:22, Joe Perches wrote:
> Since adding a new function to seq_file (seq_is_full)
> there isn't any value for functions called from seq_show to
> return anything. Remove the int returns of the various
> print_tuple/<foo>_print_tuple functions.
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
> include/net/netfilter/nf_conntrack_core.h | 2 +-
> include/net/netfilter/nf_conntrack_l3proto.h | 4 ++--
> include/net/netfilter/nf_conntrack_l4proto.h | 4 ++--
> net/netfilter/nf_conntrack_l3proto_generic.c | 5 ++---
> net/netfilter/nf_conntrack_proto_dccp.c | 10 +++++-----
> net/netfilter/nf_conntrack_proto_generic.c | 5 ++---
> net/netfilter/nf_conntrack_proto_gre.c | 10 +++++-----
> net/netfilter/nf_conntrack_proto_sctp.c | 10 +++++-----
> net/netfilter/nf_conntrack_proto_tcp.c | 10 +++++-----
> net/netfilter/nf_conntrack_proto_udp.c | 10 +++++-----
> net/netfilter/nf_conntrack_proto_udplite.c | 10 +++++-----
> net/netfilter/nf_conntrack_standalone.c | 15 +++++++--------
> 12 files changed, 46 insertions(+), 49 deletions(-)
>
> diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h
> index cc0c188..f2f0fa3 100644
> --- a/include/net/netfilter/nf_conntrack_core.h
> +++ b/include/net/netfilter/nf_conntrack_core.h
> @@ -72,7 +72,7 @@ static inline int nf_conntrack_confirm(struct sk_buff *skb)
> return ret;
> }
>
> -int
> +void
> print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
> const struct nf_conntrack_l3proto *l3proto,
> const struct nf_conntrack_l4proto *proto);
> diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
> index adc1fa3..cdc920b 100644
> --- a/include/net/netfilter/nf_conntrack_l3proto.h
> +++ b/include/net/netfilter/nf_conntrack_l3proto.h
> @@ -38,8 +38,8 @@ struct nf_conntrack_l3proto {
> const struct nf_conntrack_tuple *orig);
>
> /* Print out the per-protocol part of the tuple. */
> - int (*print_tuple)(struct seq_file *s,
> - const struct nf_conntrack_tuple *);
> + void (*print_tuple)(struct seq_file *s,
> + const struct nf_conntrack_tuple *);
>
> /*
> * Called before tracking.
> diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
> index 4c8d573..fead8ee 100644
> --- a/include/net/netfilter/nf_conntrack_l4proto.h
> +++ b/include/net/netfilter/nf_conntrack_l4proto.h
> @@ -56,8 +56,8 @@ struct nf_conntrack_l4proto {
> u_int8_t pf, unsigned int hooknum);
>
> /* Print out the per-protocol part of the tuple. Return like seq_* */
> - int (*print_tuple)(struct seq_file *s,
> - const struct nf_conntrack_tuple *);
> + void (*print_tuple)(struct seq_file *s,
> + const struct nf_conntrack_tuple *);
>
> /* Print out the private part of the conntrack. */
> int (*print_conntrack)(struct seq_file *s, struct nf_conn *);
> diff --git a/net/netfilter/nf_conntrack_l3proto_generic.c b/net/netfilter/nf_conntrack_l3proto_generic.c
> index e7eb807..cf9ace7 100644
> --- a/net/netfilter/nf_conntrack_l3proto_generic.c
> +++ b/net/netfilter/nf_conntrack_l3proto_generic.c
> @@ -49,10 +49,9 @@ static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
> return true;
> }
>
> -static int generic_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void generic_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return 0;
> }
>
> static int generic_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
> diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
> index cb372f9..40d96f9 100644
> --- a/net/netfilter/nf_conntrack_proto_dccp.c
> +++ b/net/netfilter/nf_conntrack_proto_dccp.c
> @@ -618,12 +618,12 @@ out_invalid:
> return -NF_ACCEPT;
> }
>
> -static int dccp_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void dccp_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "sport=%hu dport=%hu ",
> - ntohs(tuple->src.u.dccp.port),
> - ntohs(tuple->dst.u.dccp.port));
> + seq_printf(s, "sport=%hu dport=%hu ",
> + ntohs(tuple->src.u.dccp.port),
> + ntohs(tuple->dst.u.dccp.port));
> }
>
> static int dccp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
> diff --git a/net/netfilter/nf_conntrack_proto_generic.c b/net/netfilter/nf_conntrack_proto_generic.c
> index d25f293..0a3ded1 100644
> --- a/net/netfilter/nf_conntrack_proto_generic.c
> +++ b/net/netfilter/nf_conntrack_proto_generic.c
> @@ -39,10 +39,9 @@ static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
> }
>
> /* Print out the per-protocol part of the tuple. */
> -static int generic_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void generic_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return 0;
> }
>
> static unsigned int *generic_get_timeouts(struct net *net)
> diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
> index d566573..cd85336 100644
> --- a/net/netfilter/nf_conntrack_proto_gre.c
> +++ b/net/netfilter/nf_conntrack_proto_gre.c
> @@ -226,12 +226,12 @@ static bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
> }
>
> /* print gre part of tuple */
> -static int gre_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void gre_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "srckey=0x%x dstkey=0x%x ",
> - ntohs(tuple->src.u.gre.key),
> - ntohs(tuple->dst.u.gre.key));
> + seq_printf(s, "srckey=0x%x dstkey=0x%x ",
> + ntohs(tuple->src.u.gre.key),
> + ntohs(tuple->dst.u.gre.key));
> }
>
> /* print private data for conntrack */
> diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
> index 1314d33..1b1d0e9 100644
> --- a/net/netfilter/nf_conntrack_proto_sctp.c
> +++ b/net/netfilter/nf_conntrack_proto_sctp.c
> @@ -166,12 +166,12 @@ static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
> }
>
> /* Print out the per-protocol part of the tuple. */
> -static int sctp_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void sctp_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "sport=%hu dport=%hu ",
> - ntohs(tuple->src.u.sctp.port),
> - ntohs(tuple->dst.u.sctp.port));
> + seq_printf(s, "sport=%hu dport=%hu ",
> + ntohs(tuple->src.u.sctp.port),
> + ntohs(tuple->dst.u.sctp.port));
> }
>
> /* Print out the private part of the conntrack. */
> diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
> index 44d1ea3..c2693e78 100644
> --- a/net/netfilter/nf_conntrack_proto_tcp.c
> +++ b/net/netfilter/nf_conntrack_proto_tcp.c
> @@ -302,12 +302,12 @@ static bool tcp_invert_tuple(struct nf_conntrack_tuple *tuple,
> }
>
> /* Print out the per-protocol part of the tuple. */
> -static int tcp_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void tcp_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "sport=%hu dport=%hu ",
> - ntohs(tuple->src.u.tcp.port),
> - ntohs(tuple->dst.u.tcp.port));
> + seq_printf(s, "sport=%hu dport=%hu ",
> + ntohs(tuple->src.u.tcp.port),
> + ntohs(tuple->dst.u.tcp.port));
> }
>
> /* Print out the private part of the conntrack. */
> diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
> index 9d7721c..6957281 100644
> --- a/net/netfilter/nf_conntrack_proto_udp.c
> +++ b/net/netfilter/nf_conntrack_proto_udp.c
> @@ -63,12 +63,12 @@ static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
> }
>
> /* Print out the per-protocol part of the tuple. */
> -static int udp_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void udp_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "sport=%hu dport=%hu ",
> - ntohs(tuple->src.u.udp.port),
> - ntohs(tuple->dst.u.udp.port));
> + seq_printf(s, "sport=%hu dport=%hu ",
> + ntohs(tuple->src.u.udp.port),
> + ntohs(tuple->dst.u.udp.port));
> }
>
> static unsigned int *udp_get_timeouts(struct net *net)
> diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
> index 2750e6c..c5903d1 100644
> --- a/net/netfilter/nf_conntrack_proto_udplite.c
> +++ b/net/netfilter/nf_conntrack_proto_udplite.c
> @@ -71,12 +71,12 @@ static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
> }
>
> /* Print out the per-protocol part of the tuple. */
> -static int udplite_print_tuple(struct seq_file *s,
> - const struct nf_conntrack_tuple *tuple)
> +static void udplite_print_tuple(struct seq_file *s,
> + const struct nf_conntrack_tuple *tuple)
> {
> - return seq_printf(s, "sport=%hu dport=%hu ",
> - ntohs(tuple->src.u.udp.port),
> - ntohs(tuple->dst.u.udp.port));
> + seq_printf(s, "sport=%hu dport=%hu ",
> + ntohs(tuple->src.u.udp.port),
> + ntohs(tuple->dst.u.udp.port));
> }
>
> static unsigned int *udplite_get_timeouts(struct net *net)
> diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
> index cf65a1e..3c2ce5c 100644
> --- a/net/netfilter/nf_conntrack_standalone.c
> +++ b/net/netfilter/nf_conntrack_standalone.c
> @@ -36,12 +36,13 @@
> MODULE_LICENSE("GPL");
>
> #ifdef CONFIG_NF_CONNTRACK_PROCFS
> -int
> +void
> print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
> const struct nf_conntrack_l3proto *l3proto,
> const struct nf_conntrack_l4proto *l4proto)
> {
> - return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
> + l3proto->print_tuple(s, tuple);
> + l4proto->print_tuple(s, tuple);
> }
> EXPORT_SYMBOL_GPL(print_tuple);
>
> @@ -202,9 +203,8 @@ static int ct_seq_show(struct seq_file *s, void *v)
> if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
> goto release;
>
> - if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
> - l3proto, l4proto))
> - goto release;
> + print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
> + l3proto, l4proto);
To be precise, we should add:
if (seq_overflow(s))
goto release;
> if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
> goto release;
> @@ -213,9 +213,8 @@ static int ct_seq_show(struct seq_file *s, void *v)
> if (seq_printf(s, "[UNREPLIED] "))
> goto release;
>
> - if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
> - l3proto, l4proto))
> - goto release;
> + print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
> + l3proto, l4proto);
same here
> if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
> goto release;
> --
> 1.8.1.2.459.gbcd45b4.dirty
>
Best Regards,
Petr
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