[PATCH 04/18] xfrm: add extack to xfrm_init_state

[Steffen Klassert <steffen.klassert@secunet.com>]

From: Antony Antony <antony.antony@secunet.com>

Add a struct extack parameter to xfrm_init_state() and pass it
through to __xfrm_init_state(). This allows validation errors detected
during state initialization to propagate meaningful error messages back
to userspace.

xfrm_state_migrate() now passes extack so that errors from the
XFRM_MSG_MIGRATE_STATE path are properly reported. Callers without an
extack context (af_key, ipcomp4, ipcomp6) pass NULL, preserving their
existing behaviour.

Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Antony Antony <antony.antony@secunet.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
 include/net/xfrm.h    | 2 +-
 net/ipv4/ipcomp.c     | 2 +-
 net/ipv6/ipcomp6.c    | 2 +-
 net/key/af_key.c      | 2 +-
 net/xfrm/xfrm_state.c | 6 +++---
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 10d3edde6b2f..0c035955d87d 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1774,7 +1774,7 @@ u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
 int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack);
 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
 int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack);
-int xfrm_init_state(struct xfrm_state *x);
+int xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack);
 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
 int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 9a45aed508d1..b1ea2d37e8c5 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -77,7 +77,7 @@ static struct xfrm_state *ipcomp_tunnel_create(struct xfrm_state *x)
 	memcpy(&t->mark, &x->mark, sizeof(t->mark));
 	t->if_id = x->if_id;
 
-	if (xfrm_init_state(t))
+	if (xfrm_init_state(t, NULL))
 		goto error;
 
 	atomic_set(&t->tunnel_users, 1);
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index 8607569de34f..b340d67eb1d9 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -95,7 +95,7 @@ static struct xfrm_state *ipcomp6_tunnel_create(struct xfrm_state *x)
 	memcpy(&t->mark, &x->mark, sizeof(t->mark));
 	t->if_id = x->if_id;
 
-	if (xfrm_init_state(t))
+	if (xfrm_init_state(t, NULL))
 		goto error;
 
 	atomic_set(&t->tunnel_users, 1);
diff --git a/net/key/af_key.c b/net/key/af_key.c
index a166a88d8788..842bf5786e3f 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1299,7 +1299,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
 		}
 	}
 
-	err = xfrm_init_state(x);
+	err = xfrm_init_state(x, NULL);
 	if (err)
 		goto out;
 
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 9417a025270c..53d88b87bdbd 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -2143,7 +2143,7 @@ struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
 	if (!xc)
 		return NULL;
 
-	if (xfrm_init_state(xc) < 0)
+	if (xfrm_init_state(xc, extack) < 0)
 		goto error;
 
 	/* configure the hardware if offload is requested */
@@ -3238,11 +3238,11 @@ int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
 
 EXPORT_SYMBOL(__xfrm_init_state);
 
-int xfrm_init_state(struct xfrm_state *x)
+int xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
 {
 	int err;
 
-	err = __xfrm_init_state(x, NULL);
+	err = __xfrm_init_state(x, extack);
 	if (err)
 		return err;
 
-- 
2.43.0