xfrm: generalize xdo_dev_state_update_curlft to allow statistics update

JIRA: https://issues.redhat.com/browse/RHEL-59900

commit fd2bc41
Author: Leon Romanovsky <leon@kernel.org>
Date:   Tue Oct 3 20:57:20 2023 +0300

    xfrm: generalize xdo_dev_state_update_curlft to allow statistics update

    In order to allow drivers to fill all statistics, change the name
    of xdo_dev_state_update_curlft to be xdo_dev_state_update_stats.

    Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
    Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
    Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Signed-off-by: CKI Backport Bot <cki-ci-bot+cki-gitlab-backport-bot@redhat.com>

Author: CKI Backport Bot

Documentation/networking/xfrm_device.rst

@@ -71,9 +71,9 @@ Callbacks to implement
 	bool	(*xdo_dev_offload_ok) (struct sk_buff *skb,
 				       struct xfrm_state *x);
 	void    (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
+	void    (*xdo_dev_state_update_stats) (struct xfrm_state *x);
 
         /* Solely packet offload callbacks */
-	void    (*xdo_dev_state_update_curlft) (struct xfrm_state *x);
 	int	(*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack);
 	void	(*xdo_dev_policy_delete) (struct xfrm_policy *x);
 	void	(*xdo_dev_policy_free) (struct xfrm_policy *x);
@@ -191,6 +191,6 @@ xdo_dev_policy_free() on any remaining offloaded states.
 
 Outcome of HW handling packets, the XFRM core can't count hard, soft limits.
 The HW/driver are responsible to perform it and provide accurate data when
-xdo_dev_state_update_curlft() is called. In case of one of these limits
+xdo_dev_state_update_stats() is called. In case of one of these limits
 occuried, the driver needs to call to xfrm_state_check_expire() to make sure
 that XFRM performs rekeying sequence.

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c

@@ -984,7 +984,7 @@ static void mlx5e_xfrm_advance_esn_state(struct xfrm_state *x)
 	queue_work(sa_entry->ipsec->wq, &work->work);
 }
 
-static void mlx5e_xfrm_update_curlft(struct xfrm_state *x)
+static void mlx5e_xfrm_update_stats(struct xfrm_state *x)
 {
 	struct mlx5e_ipsec_sa_entry *sa_entry = to_ipsec_sa_entry(x);
 	struct mlx5e_ipsec_rule *ipsec_rule = &sa_entry->ipsec_rule;
@@ -993,7 +993,8 @@ static void mlx5e_xfrm_update_curlft(struct xfrm_state *x)
 	lockdep_assert(lockdep_is_held(&x->lock) ||
 		       lockdep_is_held(&dev_net(x->xso.real_dev)->xfrm.xfrm_cfg_mutex));
 
-	if (x->xso.flags & XFRM_DEV_OFFLOAD_FLAG_ACQ)
+	if (x->xso.flags & XFRM_DEV_OFFLOAD_FLAG_ACQ ||
+	    x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
 		return;
 
 	mlx5_fc_query_cached(ipsec_rule->fc, &bytes, &packets, &lastuse);
@@ -1156,7 +1157,7 @@ static const struct xfrmdev_ops mlx5e_ipsec_xfrmdev_ops = {
 	.xdo_dev_offload_ok	= mlx5e_ipsec_offload_ok,
 	.xdo_dev_state_advance_esn = mlx5e_xfrm_advance_esn_state,
 
-	.xdo_dev_state_update_curlft = mlx5e_xfrm_update_curlft,
+	.xdo_dev_state_update_stats = mlx5e_xfrm_update_stats,
 	.xdo_dev_policy_add = mlx5e_xfrm_add_policy,
 	.xdo_dev_policy_delete = mlx5e_xfrm_del_policy,
 	.xdo_dev_policy_free = mlx5e_xfrm_free_policy,

include/linux/netdevice.h

@@ -972,7 +972,7 @@ struct xfrmdev_ops {
 	bool	(*xdo_dev_offload_ok) (struct sk_buff *skb,
 				       struct xfrm_state *x);
 	void	(*xdo_dev_state_advance_esn) (struct xfrm_state *x);
-	void	(*xdo_dev_state_update_curlft) (struct xfrm_state *x);
+	void	(*xdo_dev_state_update_stats) (struct xfrm_state *x);
 	int	(*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack);
 	void	(*xdo_dev_policy_delete) (struct xfrm_policy *x);
 	void	(*xdo_dev_policy_free) (struct xfrm_policy *x);

include/net/xfrm.h

@@ -1572,21 +1572,18 @@ struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
 					      unsigned short family);
 int xfrm_state_check_expire(struct xfrm_state *x);
 #ifdef CONFIG_XFRM_OFFLOAD
-static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x)
+static inline void xfrm_dev_state_update_stats(struct xfrm_state *x)
 {
 	struct xfrm_dev_offload *xdo = &x->xso;
 	struct net_device *dev = xdo->dev;
 
-	if (x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
-		return;
-
 	if (dev && dev->xfrmdev_ops &&
-	    dev->xfrmdev_ops->xdo_dev_state_update_curlft)
-		dev->xfrmdev_ops->xdo_dev_state_update_curlft(x);
+	    dev->xfrmdev_ops->xdo_dev_state_update_stats)
+		dev->xfrmdev_ops->xdo_dev_state_update_stats(x);
 
 }
 #else
-static inline void xfrm_dev_state_update_curlft(struct xfrm_state *x) {}
+static inline void xfrm_dev_state_update_stats(struct xfrm_state *x) {}
 #endif
 void xfrm_state_insert(struct xfrm_state *x);
 int xfrm_state_add(struct xfrm_state *x);

net/xfrm/xfrm_state.c

@@ -570,7 +570,7 @@ static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
 	int err = 0;
 
 	spin_lock(&x->lock);
-	xfrm_dev_state_update_curlft(x);
+	xfrm_dev_state_update_stats(x);
 
 	if (x->km.state == XFRM_STATE_DEAD)
 		goto out;
@@ -1934,7 +1934,7 @@ EXPORT_SYMBOL(xfrm_state_update);
 
 int xfrm_state_check_expire(struct xfrm_state *x)
 {
-	xfrm_dev_state_update_curlft(x);
+	xfrm_dev_state_update_stats(x);
 
 	if (!READ_ONCE(x->curlft.use_time))
 		WRITE_ONCE(x->curlft.use_time, ktime_get_real_seconds());

net/xfrm/xfrm_user.c

@@ -902,7 +902,7 @@ static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
 	memcpy(&p->sel, &x->sel, sizeof(p->sel));
 	memcpy(&p->lft, &x->lft, sizeof(p->lft));
 	if (x->xso.dev)
-		xfrm_dev_state_update_curlft(x);
+		xfrm_dev_state_update_stats(x);
 	memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
 	put_unaligned(x->stats.replay_window, &p->stats.replay_window);
 	put_unaligned(x->stats.replay, &p->stats.replay);