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Message-Id: <20200624080804.7480-4-fw@strlen.de>
Date: Wed, 24 Jun 2020 10:08:01 +0200
From: Florian Westphal <fw@...len.de>
To: steffen.klassert@...unet.com
Cc: <netdev@...r.kernel.org>, Florian Westphal <fw@...len.de>
Subject: [PATCH ipsec-next v2 3/6] xfrm: replay: remove advance indirection
Similar to other patches: add a new helper to avoid
an indirection.
v2: fix 'net/xfrm/xfrm_replay.c:519:13: warning: 'seq' may be used
uninitialized in this function' warning.
Signed-off-by: Florian Westphal <fw@...len.de>
---
include/net/xfrm.h | 2 +-
net/xfrm/xfrm_input.c | 2 +-
net/xfrm/xfrm_replay.c | 24 +++++++++++++++---------
3 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index ed105257c5a8..78bbfd370e34 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -304,7 +304,6 @@ struct km_event {
};
struct xfrm_replay {
- void (*advance)(struct xfrm_state *x, __be32 net_seq);
int (*check)(struct xfrm_state *x,
struct sk_buff *skb,
__be32 net_seq);
@@ -1719,6 +1718,7 @@ static inline int xfrm_policy_id2dir(u32 index)
}
#ifdef CONFIG_XFRM
+void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq);
void xfrm_replay_notify(struct xfrm_state *x, int event);
static inline int xfrm_aevent_is_on(struct net *net)
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index bd984ff17c2d..b4b559b35cf1 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -663,7 +663,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
goto drop_unlock;
}
- x->repl->advance(x, seq);
+ xfrm_replay_advance(x, seq);
x->curlft.bytes += skb->len;
x->curlft.packets++;
diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index fac2f3af4c1a..460f438bd138 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -151,14 +151,26 @@ static int xfrm_replay_check(struct xfrm_state *x,
return -EINVAL;
}
-static void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
+static void xfrm_replay_advance_bmp(struct xfrm_state *x, __be32 net_seq);
+static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq);
+
+void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
{
- u32 diff;
- u32 seq = ntohl(net_seq);
+ u32 diff, seq;
+
+ switch (x->repl_mode) {
+ case XFRM_REPLAY_MODE_LEGACY:
+ break;
+ case XFRM_REPLAY_MODE_BMP:
+ return xfrm_replay_advance_bmp(x, net_seq);
+ case XFRM_REPLAY_MODE_ESN:
+ return xfrm_replay_advance_esn(x, net_seq);
+ }
if (!x->props.replay_window)
return;
+ seq = ntohl(net_seq);
if (seq > x->replay.seq) {
diff = seq - x->replay.seq;
if (diff < x->props.replay_window)
@@ -677,42 +689,36 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff
}
static const struct xfrm_replay xfrm_replay_legacy = {
- .advance = xfrm_replay_advance,
.check = xfrm_replay_check,
.recheck = xfrm_replay_check,
.overflow = xfrm_replay_overflow_offload,
};
static const struct xfrm_replay xfrm_replay_bmp = {
- .advance = xfrm_replay_advance_bmp,
.check = xfrm_replay_check_bmp,
.recheck = xfrm_replay_check_bmp,
.overflow = xfrm_replay_overflow_offload_bmp,
};
static const struct xfrm_replay xfrm_replay_esn = {
- .advance = xfrm_replay_advance_esn,
.check = xfrm_replay_check_esn,
.recheck = xfrm_replay_recheck_esn,
.overflow = xfrm_replay_overflow_offload_esn,
};
#else
static const struct xfrm_replay xfrm_replay_legacy = {
- .advance = xfrm_replay_advance,
.check = xfrm_replay_check,
.recheck = xfrm_replay_check,
.overflow = xfrm_replay_overflow,
};
static const struct xfrm_replay xfrm_replay_bmp = {
- .advance = xfrm_replay_advance_bmp,
.check = xfrm_replay_check_bmp,
.recheck = xfrm_replay_check_bmp,
.overflow = xfrm_replay_overflow_bmp,
};
static const struct xfrm_replay xfrm_replay_esn = {
- .advance = xfrm_replay_advance_esn,
.check = xfrm_replay_check_esn,
.recheck = xfrm_replay_recheck_esn,
.overflow = xfrm_replay_overflow_esn,
--
2.26.2
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