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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@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal 2021-06-18 15:51:57 +02:00 committed by Steffen Klassert
parent cfc61c598e
commit c7f877833c
3 changed files with 17 additions and 11 deletions
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2
include/net/xfrm.h
View File

@ -306,7 +306,6 @@ 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);
@ -1722,6 +1721,7 @@ 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)

2
net/xfrm/xfrm_input.c
View File

@ -665,7 +665,7 @@ resume:
goto drop_unlock;
}
x->repl->advance(x, seq);
xfrm_replay_advance(x, seq);
x->curlft.bytes += skb->len;
x->curlft.packets++;

24
net/xfrm/xfrm_replay.c
View File

@ -150,14 +150,26 @@ err:
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)
@ -695,42 +707,36 @@ 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,