From: Petr Machata <petrm@mellanox.com>
Date: Tue, 27 Feb 2018 14:53:44 +0100
Subject: mlxsw: spectrum: Keep mirror netdev in mlxsw_sp_span_entry
Patch-mainline: v4.17-rc1
Git-commit: 079c9f393b8d467995516c4716557373edefaa89
References: bsc#1112374
Currently the only mirror action supported by mlxsw is mirror to another
mlxsw physical port. Correspondingly, span_entry, which tracks each
mlxsw mirror in the system, currently holds a u8 number of the
destination port.
To extend this system to mirror to gretap and ip6gretap netdevices, have
struct mlxsw_sp_span_entry actually hold the destination netdevice
itself.
This change then trickles down in obvious manner to SPAN module API and
mirror-related interfaces in struct mlxsw_afa_ops.
To prevent use of invalid pointer, NETDEV_UNREGISTER needs to be hooked
and the corresponding SPAN entry invalidated.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c | 13 +--
drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h | 7 +
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 11 ++
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c | 2
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_actions.c | 8 +-
drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c | 39 ++++++----
drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h | 10 +-
7 files changed, 56 insertions(+), 34 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
@@ -874,9 +874,8 @@ mlxsw_afa_mirror_destructor(struct mlxsw
}
static struct mlxsw_afa_mirror *
-mlxsw_afa_mirror_create(struct mlxsw_afa_block *block,
- u8 local_in_port, u8 local_out_port,
- bool ingress)
+mlxsw_afa_mirror_create(struct mlxsw_afa_block *block, u8 local_in_port,
+ const struct net_device *out_dev, bool ingress)
{
struct mlxsw_afa_mirror *mirror;
int err;
@@ -886,7 +885,7 @@ mlxsw_afa_mirror_create(struct mlxsw_afa
return ERR_PTR(-ENOMEM);
err = block->afa->ops->mirror_add(block->afa->ops_priv,
- local_in_port, local_out_port,
+ local_in_port, out_dev,
ingress, &mirror->span_id);
if (err)
goto err_mirror_add;
@@ -918,13 +917,13 @@ mlxsw_afa_block_append_allocated_mirror(
}
int
-mlxsw_afa_block_append_mirror(struct mlxsw_afa_block *block,
- u8 local_in_port, u8 local_out_port, bool ingress)
+mlxsw_afa_block_append_mirror(struct mlxsw_afa_block *block, u8 local_in_port,
+ const struct net_device *out_dev, bool ingress)
{
struct mlxsw_afa_mirror *mirror;
int err;
- mirror = mlxsw_afa_mirror_create(block, local_in_port, local_out_port,
+ mirror = mlxsw_afa_mirror_create(block, local_in_port, out_dev,
ingress);
if (IS_ERR(mirror))
return PTR_ERR(mirror);
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
@@ -36,6 +36,7 @@
#define _MLXSW_CORE_ACL_FLEX_ACTIONS_H
#include <linux/types.h>
+#include <linux/netdevice.h>
struct mlxsw_afa;
struct mlxsw_afa_block;
@@ -48,7 +49,8 @@ struct mlxsw_afa_ops {
void (*kvdl_fwd_entry_del)(void *priv, u32 kvdl_index);
int (*counter_index_get)(void *priv, unsigned int *p_counter_index);
void (*counter_index_put)(void *priv, unsigned int counter_index);
- int (*mirror_add)(void *priv, u8 locol_in_port, u8 local_out_port,
+ int (*mirror_add)(void *priv, u8 local_in_port,
+ const struct net_device *out_dev,
bool ingress, int *p_span_id);
void (*mirror_del)(void *priv, u8 local_in_port, int span_id,
bool ingress);
@@ -71,7 +73,8 @@ int mlxsw_afa_block_append_trap(struct m
int mlxsw_afa_block_append_trap_and_forward(struct mlxsw_afa_block *block,
u16 trap_id);
int mlxsw_afa_block_append_mirror(struct mlxsw_afa_block *block,
- u8 local_in_port, u8 local_out_port,
+ u8 local_in_port,
+ const struct net_device *out_dev,
bool ingress);
int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
u8 local_port, bool in_port);
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1264,7 +1264,6 @@ mlxsw_sp_port_add_cls_matchall_mirror(st
bool ingress)
{
enum mlxsw_sp_span_type span_type;
- struct mlxsw_sp_port *to_port;
struct net_device *to_dev;
to_dev = tcf_mirred_dev(a);
@@ -1277,11 +1276,10 @@ mlxsw_sp_port_add_cls_matchall_mirror(st
netdev_err(mlxsw_sp_port->dev, "Cannot mirror to a non-spectrum port");
return -EOPNOTSUPP;
}
- to_port = netdev_priv(to_dev);
mirror->ingress = ingress;
span_type = ingress ? MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
- return mlxsw_sp_span_mirror_add(mlxsw_sp_port, to_port, span_type,
+ return mlxsw_sp_span_mirror_add(mlxsw_sp_port, to_dev, span_type,
true, &mirror->span_id);
}
@@ -4645,10 +4643,17 @@ static int mlxsw_sp_netdevice_event(stru
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct mlxsw_sp_span_entry *span_entry;
struct mlxsw_sp *mlxsw_sp;
int err = 0;
mlxsw_sp = container_of(nb, struct mlxsw_sp, netdevice_nb);
+ if (event == NETDEV_UNREGISTER) {
+ span_entry = mlxsw_sp_span_entry_find_by_port(mlxsw_sp, dev);
+ if (span_entry)
+ mlxsw_sp_span_entry_invalidate(mlxsw_sp, span_entry);
+ }
+
if (mlxsw_sp_netdev_is_ipip_ol(mlxsw_sp, dev))
err = mlxsw_sp_netdevice_ipip_ol_event(mlxsw_sp, dev,
event, ptr);
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
@@ -595,7 +595,7 @@ int mlxsw_sp_acl_rulei_act_mirror(struct
return mlxsw_afa_block_append_mirror(rulei->act_block,
in_port->local_port,
- out_port->local_port,
+ out_dev,
binding->ingress);
}
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_actions.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_flex_actions.c
@@ -126,18 +126,18 @@ mlxsw_sp_act_counter_index_put(void *pri
}
static int
-mlxsw_sp_act_mirror_add(void *priv, u8 local_in_port, u8 local_out_port,
+mlxsw_sp_act_mirror_add(void *priv, u8 local_in_port,
+ const struct net_device *out_dev,
bool ingress, int *p_span_id)
{
- struct mlxsw_sp_port *in_port, *out_port;
+ struct mlxsw_sp_port *in_port;
struct mlxsw_sp *mlxsw_sp = priv;
enum mlxsw_sp_span_type type;
type = ingress ? MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
- out_port = mlxsw_sp->ports[local_out_port];
in_port = mlxsw_sp->ports[local_in_port];
- return mlxsw_sp_span_mirror_add(in_port, out_port, type,
+ return mlxsw_sp_span_mirror_add(in_port, out_dev, type,
false, p_span_id);
}
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -91,7 +91,8 @@ static void
mlxsw_sp_span_entry_deconfigure(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry)
{
- u8 local_port = span_entry->local_port;
+ struct mlxsw_sp_port *to_port = netdev_priv(span_entry->to_dev);
+ u8 local_port = to_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
@@ -101,11 +102,12 @@ mlxsw_sp_span_entry_deconfigure(struct m
}
static struct mlxsw_sp_span_entry *
-mlxsw_sp_span_entry_create(struct mlxsw_sp_port *port)
+mlxsw_sp_span_entry_create(struct mlxsw_sp *mlxsw_sp,
+ const struct net_device *to_dev)
{
+ struct mlxsw_sp_port *to_port = netdev_priv(to_dev);
struct mlxsw_sp_span_entry *span_entry = NULL;
- struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
- u8 local_port = port->local_port;
+ u8 local_port = to_port->local_port;
int i;
/* find a free entry to use */
@@ -122,30 +124,39 @@ mlxsw_sp_span_entry_create(struct mlxsw_
return NULL;
span_entry->ref_count = 1;
- span_entry->local_port = local_port;
+ span_entry->to_dev = to_dev;
return span_entry;
}
static void mlxsw_sp_span_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry)
{
- mlxsw_sp_span_entry_deconfigure(mlxsw_sp, span_entry);
+ if (span_entry->to_dev)
+ mlxsw_sp_span_entry_deconfigure(mlxsw_sp, span_entry);
}
struct mlxsw_sp_span_entry *
-mlxsw_sp_span_entry_find_by_port(struct mlxsw_sp *mlxsw_sp, u8 local_port)
+mlxsw_sp_span_entry_find_by_port(struct mlxsw_sp *mlxsw_sp,
+ const struct net_device *to_dev)
{
int i;
for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
- if (curr->ref_count && curr->local_port == local_port)
+ if (curr->ref_count && curr->to_dev == to_dev)
return curr;
}
return NULL;
}
+void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp_span_entry *span_entry)
+{
+ mlxsw_sp_span_entry_deconfigure(mlxsw_sp, span_entry);
+ span_entry->to_dev = NULL;
+}
+
static struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_find_by_id(struct mlxsw_sp *mlxsw_sp, int span_id)
{
@@ -161,19 +172,19 @@ mlxsw_sp_span_entry_find_by_id(struct ml
}
static struct mlxsw_sp_span_entry *
-mlxsw_sp_span_entry_get(struct mlxsw_sp_port *port)
+mlxsw_sp_span_entry_get(struct mlxsw_sp *mlxsw_sp,
+ const struct net_device *to_dev)
{
struct mlxsw_sp_span_entry *span_entry;
- span_entry = mlxsw_sp_span_entry_find_by_port(port->mlxsw_sp,
- port->local_port);
+ span_entry = mlxsw_sp_span_entry_find_by_port(mlxsw_sp, to_dev);
if (span_entry) {
/* Already exists, just take a reference */
span_entry->ref_count++;
return span_entry;
}
- return mlxsw_sp_span_entry_create(port);
+ return mlxsw_sp_span_entry_create(mlxsw_sp, to_dev);
}
static int mlxsw_sp_span_entry_put(struct mlxsw_sp *mlxsw_sp,
@@ -344,7 +355,7 @@ mlxsw_sp_span_inspected_port_del(struct
}
int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
- struct mlxsw_sp_port *to,
+ const struct net_device *to_dev,
enum mlxsw_sp_span_type type, bool bind,
int *p_span_id)
{
@@ -352,7 +363,7 @@ int mlxsw_sp_span_mirror_add(struct mlxs
struct mlxsw_sp_span_entry *span_entry;
int err;
- span_entry = mlxsw_sp_span_entry_get(to);
+ span_entry = mlxsw_sp_span_entry_get(mlxsw_sp, to_dev);
if (!span_entry)
return -ENOENT;
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -51,7 +51,7 @@ struct mlxsw_sp_span_inspected_port {
};
struct mlxsw_sp_span_entry {
- u8 local_port;
+ const struct net_device *to_dev;
struct list_head bound_ports_list;
int ref_count;
int id;
@@ -61,13 +61,17 @@ int mlxsw_sp_span_init(struct mlxsw_sp *
void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp);
int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
- struct mlxsw_sp_port *to,
+ const struct net_device *to_dev,
enum mlxsw_sp_span_type type,
bool bind, int *p_span_id);
void mlxsw_sp_span_mirror_del(struct mlxsw_sp_port *from, int span_id,
enum mlxsw_sp_span_type type, bool bind);
struct mlxsw_sp_span_entry *
-mlxsw_sp_span_entry_find_by_port(struct mlxsw_sp *mlxsw_sp, u8 local_port);
+mlxsw_sp_span_entry_find_by_port(struct mlxsw_sp *mlxsw_sp,
+ const struct net_device *to_dev);
+
+void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp_span_entry *span_entry);
int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu);