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net: ipv6: ioam6: use consistent dst names

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Be consistent and use the same terminology as other lwt users: orig_dst
is the dst_entry before the transformation, while dst is either the
dst_entry in the cache or the dst_entry after the transformation

Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Link: https://patch.msgid.link/20250415112554.23823-2-justin.iurman@uliege.be
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Justin Iurman
2025-04-15 13:25:53 +02:00
committed by Paolo Abeni
parent 9a0b084a0f
commit d55acb9732
1 changed files with 18 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
net/ipv6/ioam6_iptunnel.c
View File

@@ -336,7 +336,8 @@ static int ioam6_do_encap(struct net *net, struct sk_buff *skb,
static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb), *cache_dst = NULL;
struct dst_entry *orig_dst = skb_dst(skb);
struct dst_entry *dst = NULL;
struct ioam6_lwt *ilwt;
int err = -EINVAL;
u32 pkt_cnt;
@@ -344,7 +345,7 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
if (skb->protocol != htons(ETH_P_IPV6))
goto drop;
ilwt = ioam6_lwt_state(dst->lwtstate);
ilwt = ioam6_lwt_state(orig_dst->lwtstate);
/* Check for insertion frequency (i.e., "k over n" insertions) */
pkt_cnt = atomic_fetch_inc(&ilwt->pkt_cnt);
@@ -352,7 +353,7 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
goto out;
local_bh_disable();
cache_dst = dst_cache_get(&ilwt->cache);
dst = dst_cache_get(&ilwt->cache);
local_bh_enable();
switch (ilwt->mode) {
@@ -362,7 +363,7 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
if (ipv6_hdr(skb)->nexthdr == NEXTHDR_HOP)
goto out;
err = ioam6_do_inline(net, skb, &ilwt->tuninfo, cache_dst);
err = ioam6_do_inline(net, skb, &ilwt->tuninfo, dst);
if (unlikely(err))
goto drop;
@@ -372,7 +373,7 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
/* Encapsulation (ip6ip6) */
err = ioam6_do_encap(net, skb, &ilwt->tuninfo,
ilwt->has_tunsrc, &ilwt->tunsrc,
&ilwt->tundst, cache_dst);
&ilwt->tundst, dst);
if (unlikely(err))
goto drop;
@@ -390,7 +391,7 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
goto drop;
}
if (unlikely(!cache_dst)) {
if (unlikely(!dst)) {
struct ipv6hdr *hdr = ipv6_hdr(skb);
struct flowi6 fl6;
@@ -401,20 +402,20 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
fl6.flowi6_mark = skb->mark;
fl6.flowi6_proto = hdr->nexthdr;
cache_dst = ip6_route_output(net, NULL, &fl6);
if (cache_dst->error) {
err = cache_dst->error;
dst = ip6_route_output(net, NULL, &fl6);
if (dst->error) {
err = dst->error;
goto drop;
}
/* cache only if we don't create a dst reference loop */
if (dst->lwtstate != cache_dst->lwtstate) {
if (orig_dst->lwtstate != dst->lwtstate) {
local_bh_disable();
dst_cache_set_ip6(&ilwt->cache, cache_dst, &fl6.saddr);
dst_cache_set_ip6(&ilwt->cache, dst, &fl6.saddr);
local_bh_enable();
}
err = skb_cow_head(skb, LL_RESERVED_SPACE(cache_dst->dev));
err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev));
if (unlikely(err))
goto drop;
}
@@ -422,16 +423,16 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
/* avoid lwtunnel_output() reentry loop when destination is the same
* after transformation (e.g., with the inline mode)
*/
if (dst->lwtstate != cache_dst->lwtstate) {
if (orig_dst->lwtstate != dst->lwtstate) {
skb_dst_drop(skb);
skb_dst_set(skb, cache_dst);
skb_dst_set(skb, dst);
return dst_output(net, sk, skb);
}
out:
dst_release(cache_dst);
return dst->lwtstate->orig_output(net, sk, skb);
dst_release(dst);
return orig_dst->lwtstate->orig_output(net, sk, skb);
drop:
dst_release(cache_dst);
dst_release(dst);
kfree_skb(skb);
return err;
}