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Date: Mon, 15 Oct 2007 00:43:03 +0900 (JST)
From: YOSHIFUJI Hideaki / 吉藤英明
<yoshfuji@...ux-ipv6.org>
To: herbert@...dor.apana.org.au
Cc: kaber@...sh.net, davem@...emloft.net, hadi@...erus.ca,
netdev@...r.kernel.org, kuznet@....inr.ac.ru, tgraf@...g.ch,
yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH 3/3] [IPV6]: Replace sk_buff ** with sk_buff * in input
handlers
Herbert,
I really appreciate this work.
Thank you!
--yoshfuji
In article <E1Ih4m9-0003s7-00@...dolin.me.apana.org.au> (at Sun, 14 Oct 2007 22:49:05 +0800), Herbert Xu <herbert@...dor.apana.org.au> says:
> [IPV6]: Replace sk_buff ** with sk_buff * in input handlers
>
> With all the users of the double pointers removed from the IPv6 input path,
> this patch converts all occurances of sk_buff ** to sk_buff * in IPv6 input
> handlers.
>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
> ---
>
> include/net/ipv6.h | 2 +-
> include/net/protocol.h | 2 +-
> include/net/xfrm.h | 2 +-
> net/dccp/ipv6.c | 3 +--
> net/ipv6/exthdrs.c | 41 ++++++++++++++---------------------------
> net/ipv6/icmp.c | 5 ++---
> net/ipv6/ip6_input.c | 4 ++--
> net/ipv6/reassembly.c | 3 +--
> net/ipv6/tcp_ipv6.c | 3 +--
> net/ipv6/tunnel6.c | 6 ++----
> net/ipv6/udp.c | 7 +++----
> net/ipv6/udp_impl.h | 2 +-
> net/ipv6/udplite.c | 4 ++--
> net/ipv6/xfrm6_input.c | 4 ++--
> net/sctp/ipv6.c | 4 ++--
> 15 files changed, 36 insertions(+), 56 deletions(-)
>
> diff --git a/include/net/ipv6.h b/include/net/ipv6.h
> index 31b3f1b..abd8584 100644
> --- a/include/net/ipv6.h
> +++ b/include/net/ipv6.h
> @@ -240,7 +240,7 @@ extern int ip6_ra_control(struct sock *sk, int sel,
> void (*destructor)(struct sock *));
>
>
> -extern int ipv6_parse_hopopts(struct sk_buff **skbp);
> +extern int ipv6_parse_hopopts(struct sk_buff *skb);
>
> extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
> extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
> diff --git a/include/net/protocol.h b/include/net/protocol.h
> index 105bf12..1166ffb 100644
> --- a/include/net/protocol.h
> +++ b/include/net/protocol.h
> @@ -45,7 +45,7 @@ struct net_protocol {
> #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
> struct inet6_protocol
> {
> - int (*handler)(struct sk_buff **skb);
> + int (*handler)(struct sk_buff *skb);
>
> void (*err_handler)(struct sk_buff *skb,
> struct inet6_skb_parm *opt,
> diff --git a/include/net/xfrm.h b/include/net/xfrm.h
> index 77be396..0e84484 100644
> --- a/include/net/xfrm.h
> +++ b/include/net/xfrm.h
> @@ -1051,7 +1051,7 @@ extern int xfrm4_output(struct sk_buff *skb);
> extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
> extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
> extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi);
> -extern int xfrm6_rcv(struct sk_buff **pskb);
> +extern int xfrm6_rcv(struct sk_buff *skb);
> extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
> xfrm_address_t *saddr, u8 proto);
> extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
> diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
> index 006a383..cac5354 100644
> --- a/net/dccp/ipv6.c
> +++ b/net/dccp/ipv6.c
> @@ -767,10 +767,9 @@ discard:
> return 0;
> }
>
> -static int dccp_v6_rcv(struct sk_buff **pskb)
> +static int dccp_v6_rcv(struct sk_buff *skb)
> {
> const struct dccp_hdr *dh;
> - struct sk_buff *skb = *pskb;
> struct sock *sk;
> int min_cov;
>
> diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
> index 0ff2bf1..1e89efd 100644
> --- a/net/ipv6/exthdrs.c
> +++ b/net/ipv6/exthdrs.c
> @@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(ipv6_find_tlv);
>
> struct tlvtype_proc {
> int type;
> - int (*func)(struct sk_buff **skbp, int offset);
> + int (*func)(struct sk_buff *skb, int offset);
> };
>
> /*********************
> @@ -111,10 +111,8 @@ struct tlvtype_proc {
>
> /* An unknown option is detected, decide what to do */
>
> -static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
> +static int ip6_tlvopt_unknown(struct sk_buff *skb, int optoff)
> {
> - struct sk_buff *skb = *skbp;
> -
> switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {
> case 0: /* ignore */
> return 1;
> @@ -139,9 +137,8 @@ static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
>
> /* Parse tlv encoded option header (hop-by-hop or destination) */
>
> -static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
> +static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> struct tlvtype_proc *curr;
> const unsigned char *nh = skb_network_header(skb);
> int off = skb_network_header_len(skb);
> @@ -172,13 +169,13 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
> /* type specific length/alignment
> checks will be performed in the
> func(). */
> - if (curr->func(skbp, off) == 0)
> + if (curr->func(skb, off) == 0)
> return 0;
> break;
> }
> }
> if (curr->type < 0) {
> - if (ip6_tlvopt_unknown(skbp, off) == 0)
> + if (ip6_tlvopt_unknown(skb, off) == 0)
> return 0;
> }
> break;
> @@ -198,9 +195,8 @@ bad:
> *****************************/
>
> #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
> -static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
> +static int ipv6_dest_hao(struct sk_buff *skb, int optoff)
> {
> - struct sk_buff *skb = *skbp;
> struct ipv6_destopt_hao *hao;
> struct inet6_skb_parm *opt = IP6CB(skb);
> struct ipv6hdr *ipv6h = ipv6_hdr(skb);
> @@ -271,9 +267,8 @@ static struct tlvtype_proc tlvprocdestopt_lst[] = {
> {-1, NULL}
> };
>
> -static int ipv6_destopt_rcv(struct sk_buff **skbp)
> +static int ipv6_destopt_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> struct inet6_skb_parm *opt = IP6CB(skb);
> #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
> __u16 dstbuf;
> @@ -295,9 +290,8 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
> #endif
>
> dst = dst_clone(skb->dst);
> - if (ip6_parse_tlv(tlvprocdestopt_lst, skbp)) {
> + if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
> dst_release(dst);
> - skb = *skbp;
> skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
> opt = IP6CB(skb);
> #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
> @@ -328,10 +322,8 @@ void __init ipv6_destopt_init(void)
> NONE header. No data in packet.
> ********************************/
>
> -static int ipv6_nodata_rcv(struct sk_buff **skbp)
> +static int ipv6_nodata_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> -
> kfree_skb(skb);
> return 0;
> }
> @@ -351,9 +343,8 @@ void __init ipv6_nodata_init(void)
> Routing header.
> ********************************/
>
> -static int ipv6_rthdr_rcv(struct sk_buff **skbp)
> +static int ipv6_rthdr_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> struct inet6_skb_parm *opt = IP6CB(skb);
> struct in6_addr *addr = NULL;
> struct in6_addr daddr;
> @@ -565,9 +556,8 @@ static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
>
> /* Router Alert as of RFC 2711 */
>
> -static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
> +static int ipv6_hop_ra(struct sk_buff *skb, int optoff)
> {
> - struct sk_buff *skb = *skbp;
> const unsigned char *nh = skb_network_header(skb);
>
> if (nh[optoff + 1] == 2) {
> @@ -582,9 +572,8 @@ static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
>
> /* Jumbo payload */
>
> -static int ipv6_hop_jumbo(struct sk_buff **skbp, int optoff)
> +static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
> {
> - struct sk_buff *skb = *skbp;
> const unsigned char *nh = skb_network_header(skb);
> u32 pkt_len;
>
> @@ -635,9 +624,8 @@ static struct tlvtype_proc tlvprochopopt_lst[] = {
> { -1, }
> };
>
> -int ipv6_parse_hopopts(struct sk_buff **skbp)
> +int ipv6_parse_hopopts(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> struct inet6_skb_parm *opt = IP6CB(skb);
>
> /*
> @@ -654,8 +642,7 @@ int ipv6_parse_hopopts(struct sk_buff **skbp)
> }
>
> opt->hop = sizeof(struct ipv6hdr);
> - if (ip6_parse_tlv(tlvprochopopt_lst, skbp)) {
> - skb = *skbp;
> + if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
> skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
> opt = IP6CB(skb);
> opt->nhoff = sizeof(struct ipv6hdr);
> diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
> index 47b8ce2..9bb031f 100644
> --- a/net/ipv6/icmp.c
> +++ b/net/ipv6/icmp.c
> @@ -82,7 +82,7 @@ EXPORT_SYMBOL(icmpv6msg_statistics);
> static DEFINE_PER_CPU(struct socket *, __icmpv6_socket) = NULL;
> #define icmpv6_socket __get_cpu_var(__icmpv6_socket)
>
> -static int icmpv6_rcv(struct sk_buff **pskb);
> +static int icmpv6_rcv(struct sk_buff *skb);
>
> static struct inet6_protocol icmpv6_protocol = {
> .handler = icmpv6_rcv,
> @@ -614,9 +614,8 @@ static void icmpv6_notify(struct sk_buff *skb, int type, int code, __be32 info)
> * Handle icmp messages
> */
>
> -static int icmpv6_rcv(struct sk_buff **pskb)
> +static int icmpv6_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *pskb;
> struct net_device *dev = skb->dev;
> struct inet6_dev *idev = __in6_dev_get(dev);
> struct in6_addr *saddr, *daddr;
> diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
> index 9149fc2..af355df 100644
> --- a/net/ipv6/ip6_input.c
> +++ b/net/ipv6/ip6_input.c
> @@ -125,7 +125,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
> }
>
> if (hdr->nexthdr == NEXTHDR_HOP) {
> - if (ipv6_parse_hopopts(&skb) < 0) {
> + if (ipv6_parse_hopopts(skb) < 0) {
> IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
> rcu_read_unlock();
> return 0;
> @@ -199,7 +199,7 @@ resubmit:
> !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
> goto discard;
>
> - ret = ipprot->handler(&skb);
> + ret = ipprot->handler(skb);
> if (ret > 0)
> goto resubmit;
> else if (ret == 0)
> diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
> index fa1055b..79c3253 100644
> --- a/net/ipv6/reassembly.c
> +++ b/net/ipv6/reassembly.c
> @@ -730,9 +730,8 @@ out_fail:
> return -1;
> }
>
> -static int ipv6_frag_rcv(struct sk_buff **skbp)
> +static int ipv6_frag_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *skbp;
> struct frag_hdr *fhdr;
> struct frag_queue *fq;
> struct ipv6hdr *hdr = ipv6_hdr(skb);
> diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
> index a07b59c..737b755 100644
> --- a/net/ipv6/tcp_ipv6.c
> +++ b/net/ipv6/tcp_ipv6.c
> @@ -1668,9 +1668,8 @@ ipv6_pktoptions:
> return 0;
> }
>
> -static int tcp_v6_rcv(struct sk_buff **pskb)
> +static int tcp_v6_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *pskb;
> struct tcphdr *th;
> struct sock *sk;
> int ret;
> diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c
> index 23e2809..6323921 100644
> --- a/net/ipv6/tunnel6.c
> +++ b/net/ipv6/tunnel6.c
> @@ -87,9 +87,8 @@ int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family)
>
> EXPORT_SYMBOL(xfrm6_tunnel_deregister);
>
> -static int tunnel6_rcv(struct sk_buff **pskb)
> +static int tunnel6_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *pskb;
> struct xfrm6_tunnel *handler;
>
> if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
> @@ -106,9 +105,8 @@ drop:
> return 0;
> }
>
> -static int tunnel46_rcv(struct sk_buff **pskb)
> +static int tunnel46_rcv(struct sk_buff *skb)
> {
> - struct sk_buff *skb = *pskb;
> struct xfrm6_tunnel *handler;
>
> if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
> diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
> index 82ff26d..caebad6 100644
> --- a/net/ipv6/udp.c
> +++ b/net/ipv6/udp.c
> @@ -405,10 +405,9 @@ static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
> return 0;
> }
>
> -int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[],
> +int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
> int proto)
> {
> - struct sk_buff *skb = *pskb;
> struct sock *sk;
> struct udphdr *uh;
> struct net_device *dev = skb->dev;
> @@ -494,9 +493,9 @@ discard:
> return 0;
> }
>
> -static __inline__ int udpv6_rcv(struct sk_buff **pskb)
> +static __inline__ int udpv6_rcv(struct sk_buff *skb)
> {
> - return __udp6_lib_rcv(pskb, udp_hash, IPPROTO_UDP);
> + return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
> }
>
> /*
> diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
> index 6e252f3..2d3fda6 100644
> --- a/net/ipv6/udp_impl.h
> +++ b/net/ipv6/udp_impl.h
> @@ -6,7 +6,7 @@
> #include <net/addrconf.h>
> #include <net/inet_common.h>
>
> -extern int __udp6_lib_rcv(struct sk_buff **, struct hlist_head [], int );
> +extern int __udp6_lib_rcv(struct sk_buff *, struct hlist_head [], int );
> extern void __udp6_lib_err(struct sk_buff *, struct inet6_skb_parm *,
> int , int , int , __be32 , struct hlist_head []);
>
> diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
> index f54016a..766566f 100644
> --- a/net/ipv6/udplite.c
> +++ b/net/ipv6/udplite.c
> @@ -17,9 +17,9 @@
>
> DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
>
> -static int udplitev6_rcv(struct sk_buff **pskb)
> +static int udplitev6_rcv(struct sk_buff *skb)
> {
> - return __udp6_lib_rcv(pskb, udplite_hash, IPPROTO_UDPLITE);
> + return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
> }
>
> static void udplitev6_err(struct sk_buff *skb,
> diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
> index c858537..02f69e5 100644
> --- a/net/ipv6/xfrm6_input.c
> +++ b/net/ipv6/xfrm6_input.c
> @@ -133,9 +133,9 @@ drop:
>
> EXPORT_SYMBOL(xfrm6_rcv_spi);
>
> -int xfrm6_rcv(struct sk_buff **pskb)
> +int xfrm6_rcv(struct sk_buff *skb)
> {
> - return xfrm6_rcv_spi(*pskb, 0);
> + return xfrm6_rcv_spi(skb, 0);
> }
>
> EXPORT_SYMBOL(xfrm6_rcv);
> diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
> index 9de3dda..eb4deaf 100644
> --- a/net/sctp/ipv6.c
> +++ b/net/sctp/ipv6.c
> @@ -954,9 +954,9 @@ static struct inet_protosw sctpv6_stream_protosw = {
> .flags = SCTP_PROTOSW_FLAG,
> };
>
> -static int sctp6_rcv(struct sk_buff **pskb)
> +static int sctp6_rcv(struct sk_buff *skb)
> {
> - return sctp_rcv(*pskb) ? -1 : 0;
> + return sctp_rcv(skb) ? -1 : 0;
> }
>
> static struct inet6_protocol sctpv6_protocol = {
> -
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