diff options
author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-10-09 00:16:30 (GMT) |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 23:54:53 (GMT) |
commit | 406ef77c893ebd882209be4e393d64b01fe72054 (patch) | |
tree | 815d753889769b355fba7e648abef7ad1422559e /net | |
parent | bc31d3b2c7d7f2a03721a05cb3c9a3ce8b1e2e5a (diff) | |
download | linux-406ef77c893ebd882209be4e393d64b01fe72054.tar.xz |
[IPSEC]: Move common output code to xfrm_output
Most of the code in xfrm4_output_one and xfrm6_output_one are identical so
this patch moves them into a common xfrm_output function which will live
in net/xfrm.
In fact this would seem to fix a bug as on IPv4 we never reset the network
header after a transform which may upset netfilter later on.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/xfrm4_output.c | 40 | ||||
-rw-r--r-- | net/ipv6/xfrm6_output.c | 45 | ||||
-rw-r--r-- | net/xfrm/Makefile | 2 | ||||
-rw-r--r-- | net/xfrm/xfrm_output.c | 73 |
4 files changed, 83 insertions, 77 deletions
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c index 44ef208..04805c7 100644 --- a/net/ipv4/xfrm4_output.c +++ b/net/ipv4/xfrm4_output.c @@ -12,7 +12,6 @@ #include <linux/if_ether.h> #include <linux/kernel.h> #include <linux/skbuff.h> -#include <linux/spinlock.h> #include <linux/netfilter_ipv4.h> #include <net/ip.h> #include <net/xfrm.h> @@ -41,58 +40,27 @@ out: return ret; } -static int xfrm4_output_one(struct sk_buff *skb) +static inline int xfrm4_output_one(struct sk_buff *skb) { struct dst_entry *dst = skb->dst; struct xfrm_state *x = dst->xfrm; int err; - if (skb->ip_summed == CHECKSUM_PARTIAL) { - err = skb_checksum_help(skb); - if (err) - goto error_nolock; - } - if (x->props.mode == XFRM_MODE_TUNNEL) { err = xfrm4_tunnel_check_size(skb); if (err) goto error_nolock; } - do { - spin_lock_bh(&x->lock); - err = xfrm_state_check(x, skb); - if (err) - goto error; - - err = x->mode->output(x, skb); - if (err) - goto error; - - err = x->type->output(x, skb); - if (err) - goto error; - - x->curlft.bytes += skb->len; - x->curlft.packets++; - - spin_unlock_bh(&x->lock); - - if (!(skb->dst = dst_pop(dst))) { - err = -EHOSTUNREACH; - goto error_nolock; - } - dst = skb->dst; - x = dst->xfrm; - } while (x && (x->props.mode != XFRM_MODE_TUNNEL)); + err = xfrm_output(skb); + if (err) + goto error_nolock; IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED; err = 0; out_exit: return err; -error: - spin_unlock_bh(&x->lock); error_nolock: kfree_skb(skb); goto out_exit; diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c index 56364a5..f21596f 100644 --- a/net/ipv6/xfrm6_output.c +++ b/net/ipv6/xfrm6_output.c @@ -9,9 +9,9 @@ * 2 of the License, or (at your option) any later version. */ +#include <linux/if_ether.h> #include <linux/compiler.h> #include <linux/skbuff.h> -#include <linux/spinlock.h> #include <linux/icmpv6.h> #include <linux/netfilter_ipv6.h> #include <net/ipv6.h> @@ -43,62 +43,27 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb) return ret; } -static int xfrm6_output_one(struct sk_buff *skb) +static inline int xfrm6_output_one(struct sk_buff *skb) { struct dst_entry *dst = skb->dst; struct xfrm_state *x = dst->xfrm; int err; - if (skb->ip_summed == CHECKSUM_PARTIAL) { - err = skb_checksum_help(skb); - if (err) - goto error_nolock; - } - if (x->props.mode == XFRM_MODE_TUNNEL) { err = xfrm6_tunnel_check_size(skb); if (err) goto error_nolock; } - do { - spin_lock_bh(&x->lock); - err = xfrm_state_check(x, skb); - if (err) - goto error; - - err = x->mode->output(x, skb); - if (err) - goto error; - - err = x->type->output(x, skb); - if (err) - goto error; - - x->curlft.bytes += skb->len; - x->curlft.packets++; - if (x->props.mode == XFRM_MODE_ROUTEOPTIMIZATION) - x->lastused = get_seconds(); - - spin_unlock_bh(&x->lock); - - skb_reset_network_header(skb); - - if (!(skb->dst = dst_pop(dst))) { - err = -EHOSTUNREACH; - goto error_nolock; - } - dst = skb->dst; - x = dst->xfrm; - } while (x && (x->props.mode != XFRM_MODE_TUNNEL)); + err = xfrm_output(skb); + if (err) + goto error_nolock; IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED; err = 0; out_exit: return err; -error: - spin_unlock_bh(&x->lock); error_nolock: kfree_skb(skb); goto out_exit; diff --git a/net/xfrm/Makefile b/net/xfrm/Makefile index de3c1a6..45744a3d 100644 --- a/net/xfrm/Makefile +++ b/net/xfrm/Makefile @@ -3,6 +3,6 @@ # obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \ - xfrm_input.o xfrm_algo.o + xfrm_input.o xfrm_output.o xfrm_algo.o obj-$(CONFIG_XFRM_USER) += xfrm_user.o diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c new file mode 100644 index 0000000..75f289b --- /dev/null +++ b/net/xfrm/xfrm_output.c @@ -0,0 +1,73 @@ +/* + * xfrm_output.c - Common IPsec encapsulation code. + * + * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/spinlock.h> +#include <linux/time.h> +#include <net/dst.h> +#include <net/xfrm.h> + +int xfrm_output(struct sk_buff *skb) +{ + struct dst_entry *dst = skb->dst; + struct xfrm_state *x = dst->xfrm; + int err; + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + err = skb_checksum_help(skb); + if (err) + goto error_nolock; + } + + do { + spin_lock_bh(&x->lock); + err = xfrm_state_check(x, skb); + if (err) + goto error; + + err = x->mode->output(x, skb); + if (err) + goto error; + + err = x->type->output(x, skb); + if (err) + goto error; + + x->curlft.bytes += skb->len; + x->curlft.packets++; + + if (x->props.mode == XFRM_MODE_ROUTEOPTIMIZATION) + x->lastused = get_seconds(); + + spin_unlock_bh(&x->lock); + + skb_reset_network_header(skb); + + if (!(skb->dst = dst_pop(dst))) { + err = -EHOSTUNREACH; + goto error_nolock; + } + dst = skb->dst; + x = dst->xfrm; + } while (x && (x->props.mode != XFRM_MODE_TUNNEL)); + + err = 0; + +error_nolock: + return err; +error: + spin_unlock_bh(&x->lock); + goto error_nolock; +} +EXPORT_SYMBOL_GPL(xfrm_output); |