[net-next V2 02/15] xfrm: get global statistics from the offloaded device

[Saeed Mahameed <saeed@kernel.org>]

From: Leon Romanovsky <leonro@nvidia.com>

Iterate over all SAs in order to fill global IPsec statistics.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../ethernet/mellanox/mlx5/core/en_accel/ipsec.c    |  3 ++-
 include/net/xfrm.h                                  |  3 +++
 net/xfrm/xfrm_proc.c                                |  1 +
 net/xfrm/xfrm_state.c                               | 13 +++++++++++++
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index 11a7a8bcda0f..9bfffdeb0fe8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -955,7 +955,8 @@ static void mlx5e_xfrm_update_stats(struct xfrm_state *x)
 	u64 packets, bytes, lastuse;
 
 	lockdep_assert(lockdep_is_held(&x->lock) ||
-		       lockdep_is_held(&dev_net(x->xso.real_dev)->xfrm.xfrm_cfg_mutex));
+		       lockdep_is_held(&dev_net(x->xso.real_dev)->xfrm.xfrm_cfg_mutex) ||
+		       lockdep_is_held(&dev_net(x->xso.real_dev)->xfrm.xfrm_state_lock));
 
 	if (x->xso.flags & XFRM_DEV_OFFLOAD_FLAG_ACQ ||
 	    x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 1b86409d79bb..dcfde5bd7138 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -51,8 +51,10 @@
 
 #ifdef CONFIG_XFRM_STATISTICS
 #define XFRM_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
+#define XFRM_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.xfrm_statistics, field, val)
 #else
 #define XFRM_INC_STATS(net, field)	((void)(net))
+#define XFRM_ADD_STATS(net, field, val) ((void)(net))
 #endif
 
 
@@ -1577,6 +1579,7 @@ struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
 					      unsigned short family);
 int xfrm_state_check_expire(struct xfrm_state *x);
+void xfrm_state_update_stats(struct net *net);
 #ifdef CONFIG_XFRM_OFFLOAD
 static inline void xfrm_dev_state_update_stats(struct xfrm_state *x)
 {
diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c
index fee9b5cf37a7..5f9bf8e5c933 100644
--- a/net/xfrm/xfrm_proc.c
+++ b/net/xfrm/xfrm_proc.c
@@ -52,6 +52,7 @@ static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
 
 	memset(buff, 0, sizeof(unsigned long) * LINUX_MIB_XFRMMAX);
 
+	xfrm_state_update_stats(net);
 	snmp_get_cpu_field_batch(buff, xfrm_mib_list,
 				 net->mib.xfrm_statistics);
 	for (i = 0; xfrm_mib_list[i].name; i++)
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index d8701b2d0d57..0c306473a79d 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1957,6 +1957,19 @@ int xfrm_state_check_expire(struct xfrm_state *x)
 }
 EXPORT_SYMBOL(xfrm_state_check_expire);
 
+void xfrm_state_update_stats(struct net *net)
+{
+	struct xfrm_state *x;
+	int i;
+
+	spin_lock_bh(&net->xfrm.xfrm_state_lock);
+	for (i = 0; i <= net->xfrm.state_hmask; i++) {
+		hlist_for_each_entry(x, net->xfrm.state_bydst + i, bydst)
+			xfrm_dev_state_update_stats(x);
+	}
+	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+}
+
 struct xfrm_state *
 xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
 		  u8 proto, unsigned short family)
-- 
2.41.0