blob: 52fed8c7bf1edf61aa1c3b61c04f71e8dfc9717f [file] [log] [blame]
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/rhashtable.h>
#include <linux/bitops.h>
#include <linux/in6.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/socket.h>
#include <linux/route.h>
#include <linux/gcd.h>
#include <linux/random.h>
#include <linux/if_macvlan.h>
#include <linux/refcount.h>
#include <net/netevent.h>
#include <net/neighbour.h>
#include <net/arp.h>
#include <net/ip_fib.h>
#include <net/ip6_fib.h>
#include <net/fib_rules.h>
#include <net/ip_tunnels.h>
#include <net/l3mdev.h>
#include <net/addrconf.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/fib_notifier.h>
#include <net/switchdev.h>
#include "spectrum.h"
#include "core.h"
#include "reg.h"
#include "spectrum_cnt.h"
#include "spectrum_dpipe.h"
#include "spectrum_ipip.h"
#include "spectrum_mr.h"
#include "spectrum_mr_tcam.h"
#include "spectrum_router.h"
#include "spectrum_span.h"
struct mlxsw_sp_fib;
struct mlxsw_sp_vr;
struct mlxsw_sp_lpm_tree;
struct mlxsw_sp_rif_ops;
struct mlxsw_sp_router {
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif **rifs;
struct mlxsw_sp_vr *vrs;
struct rhashtable neigh_ht;
struct rhashtable nexthop_group_ht;
struct rhashtable nexthop_ht;
struct list_head nexthop_list;
struct {
/* One tree for each protocol: IPv4 and IPv6 */
struct mlxsw_sp_lpm_tree *proto_trees[2];
struct mlxsw_sp_lpm_tree *trees;
unsigned int tree_count;
} lpm;
struct {
struct delayed_work dw;
unsigned long interval; /* ms */
} neighs_update;
struct delayed_work nexthop_probe_dw;
#define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */
struct list_head nexthop_neighs_list;
struct list_head ipip_list;
bool aborted;
struct notifier_block fib_nb;
struct notifier_block netevent_nb;
struct notifier_block inetaddr_nb;
struct notifier_block inet6addr_nb;
const struct mlxsw_sp_rif_ops **rif_ops_arr;
const struct mlxsw_sp_ipip_ops **ipip_ops_arr;
};
struct mlxsw_sp_rif {
struct list_head nexthop_list;
struct list_head neigh_list;
struct net_device *dev; /* NULL for underlay RIF */
struct mlxsw_sp_fid *fid;
unsigned char addr[ETH_ALEN];
int mtu;
u16 rif_index;
u16 vr_id;
const struct mlxsw_sp_rif_ops *ops;
struct mlxsw_sp *mlxsw_sp;
unsigned int counter_ingress;
bool counter_ingress_valid;
unsigned int counter_egress;
bool counter_egress_valid;
};
struct mlxsw_sp_rif_params {
struct net_device *dev;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
};
struct mlxsw_sp_rif_subport {
struct mlxsw_sp_rif common;
refcount_t ref_count;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
};
struct mlxsw_sp_rif_ipip_lb {
struct mlxsw_sp_rif common;
struct mlxsw_sp_rif_ipip_lb_config lb_config;
u16 ul_vr_id; /* Reserved for Spectrum-2. */
u16 ul_rif_id; /* Reserved for Spectrum. */
};
struct mlxsw_sp_rif_params_ipip_lb {
struct mlxsw_sp_rif_params common;
struct mlxsw_sp_rif_ipip_lb_config lb_config;
};
struct mlxsw_sp_rif_ops {
enum mlxsw_sp_rif_type type;
size_t rif_size;
void (*setup)(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params);
int (*configure)(struct mlxsw_sp_rif *rif);
void (*deconfigure)(struct mlxsw_sp_rif *rif);
struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack);
void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac);
};
static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif);
static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree);
static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree);
static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib,
u8 tree_id);
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib);
static unsigned int *
mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return &rif->counter_egress;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return &rif->counter_ingress;
}
return NULL;
}
static bool
mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return rif->counter_egress_valid;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return rif->counter_ingress_valid;
}
return false;
}
static void
mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
bool valid)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
rif->counter_egress_valid = valid;
break;
case MLXSW_SP_RIF_COUNTER_INGRESS:
rif->counter_ingress_valid = valid;
break;
}
}
static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
unsigned int counter_index, bool enable,
enum mlxsw_sp_rif_counter_dir dir)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
bool is_egress = false;
int err;
if (dir == MLXSW_SP_RIF_COUNTER_EGRESS)
is_egress = true;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable,
is_egress);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir, u64 *cnt)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
unsigned int *p_counter_index;
bool valid;
int err;
valid = mlxsw_sp_rif_counter_valid_get(rif, dir);
if (!valid)
return -EINVAL;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index,
MLXSW_REG_RICNT_OPCODE_NOP);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
if (err)
return err;
*cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl);
return 0;
}
static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
mlxsw_reg_ricnt_pack(ricnt_pl, counter_index,
MLXSW_REG_RICNT_OPCODE_CLEAR);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
}
int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
int err;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
p_counter_index);
if (err)
return err;
err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index);
if (err)
goto err_counter_clear;
err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, true, dir);
if (err)
goto err_counter_edit;
mlxsw_sp_rif_counter_valid_set(rif, dir, true);
return 0;
err_counter_edit:
err_counter_clear:
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
return err;
}
void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
if (!mlxsw_sp_rif_counter_valid_get(rif, dir))
return;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (WARN_ON(!p_counter_index))
return;
mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, false, dir);
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
mlxsw_sp_rif_counter_valid_set(rif, dir, false);
}
static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct devlink *devlink;
devlink = priv_to_devlink(mlxsw_sp->core);
if (!devlink_dpipe_table_counter_enabled(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ERIF))
return;
mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
#define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1)
struct mlxsw_sp_prefix_usage {
DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT);
};
#define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \
for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT)
static bool
mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static void
mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static void
mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
set_bit(prefix_len, prefix_usage->b);
}
static void
mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
clear_bit(prefix_len, prefix_usage->b);
}
struct mlxsw_sp_fib_key {
unsigned char addr[sizeof(struct in6_addr)];
unsigned char prefix_len;
};
enum mlxsw_sp_fib_entry_type {
MLXSW_SP_FIB_ENTRY_TYPE_REMOTE,
MLXSW_SP_FIB_ENTRY_TYPE_LOCAL,
MLXSW_SP_FIB_ENTRY_TYPE_TRAP,
MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE,
/* This is a special case of local delivery, where a packet should be
* decapsulated on reception. Note that there is no corresponding ENCAP,
* because that's a type of next hop, not of FIB entry. (There can be
* several next hops in a REMOTE entry, and some of them may be
* encapsulating entries.)
*/
MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP,
MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP,
};
struct mlxsw_sp_nexthop_group;
struct mlxsw_sp_fib_node {
struct list_head entry_list;
struct list_head list;
struct rhash_head ht_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_fib_key key;
};
struct mlxsw_sp_fib_entry_decap {
struct mlxsw_sp_ipip_entry *ipip_entry;
u32 tunnel_index;
};
struct mlxsw_sp_fib_entry {
struct list_head list;
struct mlxsw_sp_fib_node *fib_node;
enum mlxsw_sp_fib_entry_type type;
struct list_head nexthop_group_node;
struct mlxsw_sp_nexthop_group *nh_group;
struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */
};
struct mlxsw_sp_fib4_entry {
struct mlxsw_sp_fib_entry common;
u32 tb_id;
u32 prio;
u8 tos;
u8 type;
};
struct mlxsw_sp_fib6_entry {
struct mlxsw_sp_fib_entry common;
struct list_head rt6_list;
unsigned int nrt6;
};
struct mlxsw_sp_rt6 {
struct list_head list;
struct fib6_info *rt;
};
struct mlxsw_sp_lpm_tree {
u8 id; /* tree ID */
unsigned int ref_count;
enum mlxsw_sp_l3proto proto;
unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT];
struct mlxsw_sp_prefix_usage prefix_usage;
};
struct mlxsw_sp_fib {
struct rhashtable ht;
struct list_head node_list;
struct mlxsw_sp_vr *vr;
struct mlxsw_sp_lpm_tree *lpm_tree;
enum mlxsw_sp_l3proto proto;
};
struct mlxsw_sp_vr {
u16 id; /* virtual router ID */
u32 tb_id; /* kernel fib table id */
unsigned int rif_count;
struct mlxsw_sp_fib *fib4;
struct mlxsw_sp_fib *fib6;
struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX];
struct mlxsw_sp_rif *ul_rif;
refcount_t ul_rif_refcnt;
};
static const struct rhashtable_params mlxsw_sp_fib_ht_params;
static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
struct mlxsw_sp_fib *fib;
int err;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto];
fib = kzalloc(sizeof(*fib), GFP_KERNEL);
if (!fib)
return ERR_PTR(-ENOMEM);
err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params);
if (err)
goto err_rhashtable_init;
INIT_LIST_HEAD(&fib->node_list);
fib->proto = proto;
fib->vr = vr;
fib->lpm_tree = lpm_tree;
mlxsw_sp_lpm_tree_hold(lpm_tree);
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id);
if (err)
goto err_lpm_tree_bind;
return fib;
err_lpm_tree_bind:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
err_rhashtable_init:
kfree(fib);
return ERR_PTR(err);
}
static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib)
{
mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib);
mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree);
WARN_ON(!list_empty(&fib->node_list));
rhashtable_destroy(&fib->ht);
kfree(fib);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp)
{
static struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count == 0)
return lpm_tree;
}
return NULL;
}
static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, true,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, false,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static int
mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralst_pl[MLXSW_REG_RALST_LEN];
u8 root_bin = 0;
u8 prefix;
u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD;
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage)
root_bin = prefix;
mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id);
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) {
if (prefix == 0)
continue;
mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix,
MLXSW_REG_RALST_BIN_NO_CHILD);
last_prefix = prefix;
}
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp);
if (!lpm_tree)
return ERR_PTR(-EBUSY);
lpm_tree->proto = proto;
err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree);
if (err)
return ERR_PTR(err);
err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage,
lpm_tree);
if (err)
goto err_left_struct_set;
memcpy(&lpm_tree->prefix_usage, prefix_usage,
sizeof(lpm_tree->prefix_usage));
memset(&lpm_tree->prefix_ref_count, 0,
sizeof(lpm_tree->prefix_ref_count));
lpm_tree->ref_count = 1;
return lpm_tree;
err_left_struct_set:
mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
return ERR_PTR(err);
}
static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count != 0 &&
lpm_tree->proto == proto &&
mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage,
prefix_usage)) {
mlxsw_sp_lpm_tree_hold(lpm_tree);
return lpm_tree;
}
}
return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto);
}
static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree)
{
lpm_tree->ref_count++;
}
static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
if (--lpm_tree->ref_count == 0)
mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree);
}
#define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */
static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } };
struct mlxsw_sp_lpm_tree *lpm_tree;
u64 max_trees;
int err, i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES))
return -EIO;
max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES);
mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN;
mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count,
sizeof(struct mlxsw_sp_lpm_tree),
GFP_KERNEL);
if (!mlxsw_sp->router->lpm.trees)
return -ENOMEM;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN;
}
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(lpm_tree)) {
err = PTR_ERR(lpm_tree);
goto err_ipv4_tree_get;
}
mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree;
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(lpm_tree)) {
err = PTR_ERR(lpm_tree);
goto err_ipv6_tree_get;
}
mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree;
return 0;
err_ipv6_tree_get:
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
err_ipv4_tree_get:
kfree(mlxsw_sp->router->lpm.trees);
return err;
}
static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
kfree(mlxsw_sp->router->lpm.trees);
}
static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr)
{
return !!vr->fib4 || !!vr->fib6 ||
!!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] ||
!!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6];
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_is_used(vr))
return vr;
}
return NULL;
}
static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib, u8 tree_id)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto,
tree_id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
/* Bind to tree 0 which is default */
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static u32 mlxsw_sp_fix_tb_id(u32 tb_id)
{
/* For our purpose, squash main, default and local tables into one */
if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT)
tb_id = RT_TABLE_MAIN;
return tb_id;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp,
u32 tb_id)
{
struct mlxsw_sp_vr *vr;
int i;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id)
return vr;
}
return NULL;
}
int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
u16 *vr_id)
{
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
return -ESRCH;
*vr_id = vr->id;
return 0;
}
static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
return vr->fib4;
case MLXSW_SP_L3_PROTO_IPV6:
return vr->fib6;
}
return NULL;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp,
u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_mr_table *mr4_table, *mr6_table;
struct mlxsw_sp_fib *fib4;
struct mlxsw_sp_fib *fib6;
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_find_unused(mlxsw_sp);
if (!vr) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers");
return ERR_PTR(-EBUSY);
}
fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(fib4))
return ERR_CAST(fib4);
fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(fib6)) {
err = PTR_ERR(fib6);
goto err_fib6_create;
}
mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(mr4_table)) {
err = PTR_ERR(mr4_table);
goto err_mr4_table_create;
}
mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(mr6_table)) {
err = PTR_ERR(mr6_table);
goto err_mr6_table_create;
}
vr->fib4 = fib4;
vr->fib6 = fib6;
vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table;
vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table;
vr->tb_id = tb_id;
return vr;
err_mr6_table_create:
mlxsw_sp_mr_table_destroy(mr4_table);
err_mr4_table_create:
mlxsw_sp_fib_destroy(mlxsw_sp, fib6);
err_fib6_create:
mlxsw_sp_fib_destroy(mlxsw_sp, fib4);
return ERR_PTR(err);
}
static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr)
{
mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]);
vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL;
mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]);
vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL;
mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6);
vr->fib6 = NULL;
mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4);
vr->fib4 = NULL;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_vr *vr;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack);
return vr;
}
static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr)
{
if (!vr->rif_count && list_empty(&vr->fib4->node_list) &&
list_empty(&vr->fib6->node_list) &&
mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) &&
mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]))
mlxsw_sp_vr_destroy(mlxsw_sp, vr);
}
static bool
mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto, u8 tree_id)
{
struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto);
if (!mlxsw_sp_vr_is_used(vr))
return false;
if (fib->lpm_tree->id == tree_id)
return true;
return false;
}
static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib,
struct mlxsw_sp_lpm_tree *new_tree)
{
struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree;
int err;
fib->lpm_tree = new_tree;
mlxsw_sp_lpm_tree_hold(new_tree);
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id);
if (err)
goto err_tree_bind;
mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree);
return 0;
err_tree_bind:
mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree);
fib->lpm_tree = old_tree;
return err;
}
static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib,
struct mlxsw_sp_lpm_tree *new_tree)
{
enum mlxsw_sp_l3proto proto = fib->proto;
struct mlxsw_sp_lpm_tree *old_tree;
u8 old_id, new_id = new_tree->id;
struct mlxsw_sp_vr *vr;
int i, err;
old_tree = mlxsw_sp->router->lpm.proto_trees[proto];
old_id = old_tree->id;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id))
continue;
err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp,
mlxsw_sp_vr_fib(vr, proto),
new_tree);
if (err)
goto err_tree_replace;
}
memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count,
sizeof(new_tree->prefix_ref_count));
mlxsw_sp->router->lpm.proto_trees[proto] = new_tree;
mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree);
return 0;
err_tree_replace:
for (i--; i >= 0; i--) {
if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id))
continue;
mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp,
mlxsw_sp_vr_fib(vr, proto),
old_tree);
}
return err;
}
static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
u64 max_vrs;
int i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS))
return -EIO;
max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS);
mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr),
GFP_KERNEL);
if (!mlxsw_sp->router->vrs)
return -ENOMEM;
for (i = 0; i < max_vrs; i++) {
vr = &mlxsw_sp->router->vrs[i];
vr->id = i;
}
return 0;
}
static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp)
{
/* At this stage we're guaranteed not to have new incoming
* FIB notifications and the work queue is free from FIBs
* sitting on top of mlxsw netdevs. However, we can still
* have other FIBs queued. Flush the queue before flushing
* the device's tables. No need for locks, as we're the only
* writer.
*/
mlxsw_core_flush_owq();
mlxsw_sp_router_fib_flush(mlxsw_sp);
kfree(mlxsw_sp->router->vrs);
}
static struct net_device *
__mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev)
{
struct ip_tunnel *tun = netdev_priv(ol_dev);
struct net *net = dev_net(ol_dev);
return __dev_get_by_index(net, tun->parms.link);
}
u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev)
{
struct net_device *d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
if (d)
return l3mdev_fib_table(d) ? : RT_TABLE_MAIN;
else
return l3mdev_fib_table(ol_dev) ? : RT_TABLE_MAIN;
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif_params *params,
struct netlink_ext_ack *extack);
static struct mlxsw_sp_rif_ipip_lb *
mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_params_ipip_lb lb_params;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_rif *rif;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt];
lb_params = (struct mlxsw_sp_rif_params_ipip_lb) {
.common.dev = ol_dev,
.common.lag = false,
.lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev),
};
rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack);
if (IS_ERR(rif))
return ERR_CAST(rif);
return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common);
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_ipip_entry *ret = NULL;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt];
ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL);
if (!ipip_entry)
return ERR_PTR(-ENOMEM);
ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt,
ol_dev, NULL);
if (IS_ERR(ipip_entry->ol_lb)) {
ret = ERR_CAST(ipip_entry->ol_lb);
goto err_ol_ipip_lb_create;
}
ipip_entry->ipipt = ipipt;
ipip_entry->ol_dev = ol_dev;
switch (ipip_ops->ul_proto) {
case MLXSW_SP_L3_PROTO_IPV4:
ipip_entry->parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);
break;
case MLXSW_SP_L3_PROTO_IPV6:
WARN_ON(1);
break;
}
return ipip_entry;
err_ol_ipip_lb_create:
kfree(ipip_entry);
return ret;
}
static void
mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp_ipip_entry *ipip_entry)
{
mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common);
kfree(ipip_entry);
}
static bool
mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp,
const enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr saddr,
u32 ul_tb_id,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev);
enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt;
union mlxsw_sp_l3addr tun_saddr;
if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto)
return false;
tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev);
return tun_ul_tb_id == ul_tb_id &&
mlxsw_sp_l3addr_eq(&tun_saddr, &saddr);
}
static int
mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 tunnel_index;
int err;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
1, &tunnel_index);
if (err)
return err;
ipip_entry->decap_fib_entry = fib_entry;
fib_entry->decap.ipip_entry = ipip_entry;
fib_entry->decap.tunnel_index = tunnel_index;
return 0;
}
static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
/* Unlink this node from the IPIP entry that it's the decap entry of. */
fib_entry->decap.ipip_entry->decap_fib_entry = NULL;
fib_entry->decap.ipip_entry = NULL;
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
1, fib_entry->decap.tunnel_index);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len);
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry);
static void
mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry;
mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry);
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
}
static void
mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct mlxsw_sp_fib_entry *decap_fib_entry)
{
if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry,
ipip_entry))
return;
decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry))
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
}
static struct mlxsw_sp_fib_entry *
mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
enum mlxsw_sp_l3proto proto,
const union mlxsw_sp_l3addr *addr,
enum mlxsw_sp_fib_entry_type type)
{
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_fib_node *fib_node;
unsigned char addr_prefix_len;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
const void *addrp;
size_t addr_len;
u32 addr4;
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
return NULL;
fib = mlxsw_sp_vr_fib(vr, proto);
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
addr4 = be32_to_cpu(addr->addr4);
addrp = &addr4;
addr_len = 4;
addr_prefix_len = 32;
break;
case MLXSW_SP_L3_PROTO_IPV6: /* fall through */
default:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len,
addr_prefix_len);
if (!fib_node || list_empty(&fib_node->entry_list))
return NULL;
fib_entry = list_first_entry(&fib_node->entry_list,
struct mlxsw_sp_fib_entry, list);
if (fib_entry->type != type)
return NULL;
return fib_entry;
}
/* Given an IPIP entry, find the corresponding decap route. */
static struct mlxsw_sp_fib_entry *
mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
static struct mlxsw_sp_fib_node *fib_node;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_fib_entry *fib_entry;
unsigned char saddr_prefix_len;
union mlxsw_sp_l3addr saddr;
struct mlxsw_sp_fib *ul_fib;
struct mlxsw_sp_vr *ul_vr;
const void *saddrp;
size_t saddr_len;
u32 ul_tb_id;
u32 saddr4;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev);
ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id);
if (!ul_vr)
return NULL;
ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto);
saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto,
ipip_entry->ol_dev);
switch (ipip_ops->ul_proto) {
case MLXSW_SP_L3_PROTO_IPV4:
saddr4 = be32_to_cpu(saddr.addr4);
saddrp = &saddr4;
saddr_len = 4;
saddr_prefix_len = 32;
break;
case MLXSW_SP_L3_PROTO_IPV6:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len,
saddr_prefix_len);
if (!fib_node || list_empty(&fib_node->entry_list))
return NULL;
fib_entry = list_first_entry(&fib_node->entry_list,
struct mlxsw_sp_fib_entry, list);
if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP)
return NULL;
return fib_entry;
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev);
if (IS_ERR(ipip_entry))
return ipip_entry;
list_add_tail(&ipip_entry->ipip_list_node,
&mlxsw_sp->router->ipip_list);
return ipip_entry;
}
static void
mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
list_del(&ipip_entry->ipip_list_node);
mlxsw_sp_ipip_entry_dealloc(ipip_entry);
}
static bool
mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ul_dev,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr ul_dip,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN;
enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt;
if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto)
return false;
return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip,
ul_tb_id, ipip_entry);
}
/* Given decap parameters, find the corresponding IPIP entry. */
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ul_dev,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr ul_dip)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node)
if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev,
ul_proto, ul_dip,
ipip_entry))
return ipip_entry;
return NULL;
}
static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev,
enum mlxsw_sp_ipip_type *p_type)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
enum mlxsw_sp_ipip_type ipipt;
for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) {
ipip_ops = router->ipip_ops_arr[ipipt];
if (dev->type == ipip_ops->dev_type) {
if (p_type)
*p_type = ipipt;
return true;
}
}
return false;
}
bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL);
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node)
if (ipip_entry->ol_dev == ol_dev)
return ipip_entry;
return NULL;
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *ul_dev,
struct mlxsw_sp_ipip_entry *start)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list,
ipip_list_node);
list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
struct net_device *ipip_ul_dev =
__mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev);
if (ipip_ul_dev == ul_dev)
return ipip_entry;
}
return NULL;
}
bool mlxsw_sp_netdev_is_ipip_ul(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL);
}
static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ol_dev,
enum mlxsw_sp_ipip_type ipipt)
{
const struct mlxsw_sp_ipip_ops *ops
= mlxsw_sp->router->ipip_ops_arr[ipipt];
/* For deciding whether decap should be offloaded, we don't care about
* overlay protocol, so ask whether either one is supported.
*/
return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) ||
ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6);
}
static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
enum mlxsw_sp_l3proto ul_proto;
enum mlxsw_sp_ipip_type ipipt;
union mlxsw_sp_l3addr saddr;
u32 ul_tb_id;
mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt);
if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) {
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev);
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev);
if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
NULL)) {
ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt,
ol_dev);
if (IS_ERR(ipip_entry))
return PTR_ERR(ipip_entry);
}
}
return 0;
}
static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry);
}
static void
mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct mlxsw_sp_fib_entry *decap_fib_entry;
decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry);
if (decap_fib_entry)
mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry,
decap_fib_entry);
}
static int
mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id,
u16 ul_rif_id, bool enable)
{
struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config;
struct mlxsw_sp_rif *rif = &lb_rif->common;
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
u32 saddr4;
switch (lb_cf.ul_protocol) {
case MLXSW_SP_L3_PROTO_IPV4:
saddr4 = be32_to_cpu(lb_cf.saddr.addr4);
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF,
rif->rif_index, rif->vr_id, rif->dev->mtu);
mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt,
MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET,
ul_vr_id, ul_rif_id, saddr4, lb_cf.okey);
break;
case MLXSW_SP_L3_PROTO_IPV6:
return -EAFNOSUPPORT;
}
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif_ipip_lb *lb_rif;
int err = 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry) {
lb_rif = ipip_entry->ol_lb;
err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id,
lb_rif->ul_rif_id, true);
if (err)
goto out;
lb_rif->common.mtu = ol_dev->mtu;
}
out:
return err;
}
static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry);
}
static void
mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
if (ipip_entry->decap_fib_entry)
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
}
static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry);
}
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif);
static int
mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
bool keep_encap,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb;
struct mlxsw_sp_rif_ipip_lb *new_lb_rif;
new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp,
ipip_entry->ipipt,
ipip_entry->ol_dev,
extack);
if (IS_ERR(new_lb_rif))
return PTR_ERR(new_lb_rif);
ipip_entry->ol_lb = new_lb_rif;
if (keep_encap)
mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common,
&new_lb_rif->common);
mlxsw_sp_rif_destroy(&old_lb_rif->common);
return 0;
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif);
/**
* Update the offload related to an IPIP entry. This always updates decap, and
* in addition to that it also:
* @recreate_loopback: recreates the associated loopback RIF
* @keep_encap: updates next hops that use the tunnel netdevice. This is only
* relevant when recreate_loopback is true.
* @update_nexthops: updates next hops, keeping the current loopback RIF. This
* is only relevant when recreate_loopback is false.
*/
int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
bool recreate_loopback,
bool keep_encap,
bool update_nexthops,
struct netlink_ext_ack *extack)
{
int err;
/* RIFs can't be edited, so to update loopback, we need to destroy and
* recreate it. That creates a window of opportunity where RALUE and
* RATR registers end up referencing a RIF that's already gone. RATRs
* are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care
* of RALUE, demote the decap route back.
*/
if (ipip_entry->decap_fib_entry)
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
if (recreate_loopback) {
err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry,
keep_encap, extack);
if (err)
return err;
} else if (update_nexthops) {
mlxsw_sp_nexthop_rif_update(mlxsw_sp,
&ipip_entry->ol_lb->common);
}
if (ipip_entry->ol_dev->flags & IFF_UP)
mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry);
return 0;
}
static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_ipip_entry *ipip_entry =
mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
enum mlxsw_sp_l3proto ul_proto;
union mlxsw_sp_l3addr saddr;
u32 ul_tb_id;
if (!ipip_entry)
return 0;
/* For flat configuration cases, moving overlay to a different VRF might
* cause local address conflict, and the conflicting tunnels need to be
* demoted.
*/
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev);
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev);
if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
ipip_entry)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return 0;
}
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
true, false, false, extack);
}
static int
mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev,
struct netlink_ext_ack *extack)
{
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
true, true, false, extack);
}
static int
mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev)
{
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
false, false, true, NULL);
}
static int
mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev)
{
/* A down underlay device causes encapsulated packets to not be
* forwarded, but decap still works. So refresh next hops without
* touching anything else.
*/
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
false, false, true, NULL);
}
static int
mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
int err;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (!ipip_entry)
/* A change might make a tunnel eligible for offloading, but
* that is currently not implemented. What falls to slow path
* stays there.
*/
return 0;
/* A change might make a tunnel not eligible for offloading. */
if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev,
ipip_entry->ipipt)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return 0;
}
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack);
return err;
}
void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct net_device *ol_dev = ipip_entry->ol_dev;
if (ol_dev->flags & IFF_UP)
mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry);
mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry);
}
/* The configuration where several tunnels have the same local address in the
* same underlay table needs special treatment in the HW. That is currently not
* implemented in the driver. This function finds and demotes the first tunnel
* with a given source address, except the one passed in in the argument
* `except'.
*/
bool
mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr saddr,
u32 ul_tb_id,
const struct mlxsw_sp_ipip_entry *except)
{
struct mlxsw_sp_ipip_entry *ipip_entry, *tmp;
list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
if (ipip_entry != except &&
mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr,
ul_tb_id, ipip_entry)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return true;
}
}
return false;
}
static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp,
struct net_device *ul_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry, *tmp;
list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
struct net_device *ipip_ul_dev =
__mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev);
if (ipip_ul_dev == ul_dev)
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
}
}
int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
unsigned long event,
struct netdev_notifier_info *info)
{
struct netdev_notifier_changeupper_info *chup;
struct netlink_ext_ack *extack;
switch (event) {
case NETDEV_REGISTER:
return mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev);
case NETDEV_UNREGISTER:
mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev);
return 0;
case NETDEV_UP:
mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev);
return 0;
case NETDEV_DOWN:
mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev);
return 0;
case NETDEV_CHANGEUPPER:
chup = container_of(info, typeof(*chup), info);
extack = info->extack;
if (netif_is_l3_master(chup->upper_dev))
return mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp,
ol_dev,
extack);
return 0;
case NETDEV_CHANGE:
extack = info->extack;
return mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp,
ol_dev, extack);
case NETDEV_CHANGEMTU:
return mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev);
}
return 0;
}
static int
__mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev,
unsigned long event,
struct netdev_notifier_info *info)
{
struct netdev_notifier_changeupper_info *chup;
struct netlink_ext_ack *extack;
switch (event) {
case NETDEV_CHANGEUPPER:
chup = container_of(info, typeof(*chup), info);
extack = info->extack;
if (netif_is_l3_master(chup->upper_dev))
return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp,
ipip_entry,
ul_dev,
extack);
break;
case NETDEV_UP:
return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry,
ul_dev);
case NETDEV_DOWN:
return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp,
ipip_entry,
ul_dev);
}
return 0;
}
int
mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ul_dev,
unsigned long event,
struct netdev_notifier_info *info)
{
struct mlxsw_sp_ipip_entry *ipip_entry = NULL;
int err;
while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp,
ul_dev,
ipip_entry))) {
err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry,
ul_dev, event, info);
if (err) {
mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp,
ul_dev);
return err;
}
}
return 0;
}
int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip,
u32 tunnel_index)
{
enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
struct mlxsw_sp_fib_entry *fib_entry;
int err;
/* It is valid to create a tunnel with a local IP and only later
* assign this IP address to a local interface
*/
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
return 0;
fib_entry->decap.tunnel_index = tunnel_index;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
goto err_fib_entry_update;
return 0;
err_fib_entry_update:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
return err;
}
void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip)
{
enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
struct mlxsw_sp_fib_entry *fib_entry;
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
return;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
}
struct mlxsw_sp_neigh_key {
struct neighbour *n;
};
struct mlxsw_sp_neigh_entry {
struct list_head rif_list_node;
struct rhash_head ht_node;
struct mlxsw_sp_neigh_key key;
u16 rif;
bool connected;
unsigned char ha[ETH_ALEN];
struct list_head nexthop_list; /* list of nexthops using
* this neigh entry
*/
struct list_head nexthop_neighs_list_node;
unsigned int counter_index;
bool counter_valid;
};
static const struct rhashtable_params mlxsw_sp_neigh_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_neigh_entry, key),
.head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_neigh_key),
};
struct mlxsw_sp_neigh_entry *
mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!neigh_entry) {
if (list_empty(&rif->neigh_list))
return NULL;
else
return list_first_entry(&rif->neigh_list,
typeof(*neigh_entry),
rif_list_node);
}
if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list))
return NULL;
return list_next_entry(neigh_entry, rif_list_node);
}
int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry)
{
return neigh_entry->key.n->tbl->family;
}
unsigned char *
mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry)
{
return neigh_entry->ha;
}
u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n;
n = neigh_entry->key.n;
return ntohl(*((__be32 *) n->primary_key));
}
struct in6_addr *
mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n;
n = neigh_entry->key.n;
return (struct in6_addr *) &n->primary_key;
}
int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
u64 *p_counter)
{
if (!neigh_entry->counter_valid)
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index,
p_counter, NULL);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n,
u16 rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL);
if (!neigh_entry)
return NULL;
neigh_entry->key.n = n;
neigh_entry->rif = rif;
INIT_LIST_HEAD(&neigh_entry->nexthop_list);
return neigh_entry;
}
static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry)
{
kfree(neigh_entry);
}
static int
mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static bool
mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct devlink *devlink;
const char *table_name;
switch (mlxsw_sp_neigh_entry_type(neigh_entry)) {
case AF_INET:
table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4;
break;
case AF_INET6:
table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6;
break;
default:
WARN_ON(1);
return false;
}
devlink = priv_to_devlink(mlxsw_sp->core);
return devlink_dpipe_table_counter_enabled(devlink, table_name);
}
static void
mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry))
return;
if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index))
return;
neigh_entry->counter_valid = true;
}
static void
mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!neigh_entry->counter_valid)
return;
mlxsw_sp_flow_counter_free(mlxsw_sp,
neigh_entry->counter_index);
neigh_entry->counter_valid = false;
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_rif *rif;
int err;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev);
if (!rif)
return ERR_PTR(-EINVAL);
neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index);
if (!neigh_entry)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry);
list_add(&neigh_entry->rif_list_node, &rif->neigh_list);
return neigh_entry;
err_neigh_entry_insert:
mlxsw_sp_neigh_entry_free(neigh_entry);
return ERR_PTR(err);
}
static void
mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
list_del(&neigh_entry->rif_list_node);
mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_free(neigh_entry);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_key key;
key.n = n;
return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht,
&key, mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval;
#if IS_ENABLED(CONFIG_IPV6)
interval = min_t(unsigned long,
NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME),
NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME));
#else
interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME);
#endif
mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval);
}
static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int ent_index)
{
struct net_device *dev;
struct neighbour *n;
__be32 dipn;
u32 dip;
u16 rif;
mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip);
if (!mlxsw_sp->router->rifs[rif]) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n");
return;
}
dipn = htonl(dip);
dev = mlxsw_sp->router->rifs[rif]->dev;
n = neigh_lookup(&arp_tbl, &dipn, dev);
if (!n)
return;
netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip);
neigh_event_send(n, NULL);
neigh_release(n);
}
#if IS_ENABLED(CONFIG_IPV6)
static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
struct net_device *dev;
struct neighbour *n;
struct in6_addr dip;
u16 rif;
mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif,
(char *) &dip);
if (!mlxsw_sp->router->rifs[rif]) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n");
return;
}
dev = mlxsw_sp->router->rifs[rif]->dev;
n = neigh_lookup(&nd_tbl, &dip, dev);
if (!n)
return;
netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip);
neigh_event_send(n, NULL);
neigh_release(n);
}
#else
static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
}
#endif
static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
u8 num_entries;
int i;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
rec_index);
/* Hardware starts counting at 0, so add 1. */
num_entries++;
/* Each record consists of several neighbour entries. */
for (i = 0; i < num_entries; i++) {
int ent_index;
ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i;
mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl,
ent_index);
}
}
static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
/* One record contains one entry. */
mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl,
rec_index);
}
static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl, int rec_index)
{
switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) {
case MLXSW_REG_RAUHTD_TYPE_IPV4:
mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl,
rec_index);
break;
case MLXSW_REG_RAUHTD_TYPE_IPV6:
mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl,
rec_index);
break;
}
}
static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl)
{
u8 num_rec, last_rec_index, num_entries;
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
last_rec_index = num_rec - 1;
if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM)
return false;
if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) ==
MLXSW_REG_RAUHTD_TYPE_IPV6)
return true;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
last_rec_index);
if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC)
return true;
return false;
}
static int
__mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
enum mlxsw_reg_rauhtd_type type)
{
int i, num_rec;
int err;
/* Make sure the neighbour's netdev isn't removed in the
* process.
*/
rtnl_lock();
do {
mlxsw_reg_rauhtd_pack(rauhtd_pl, type);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd),
rauhtd_pl);
if (err) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n");
break;
}
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
for (i = 0; i < num_rec; i++)
mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl,
i);
} while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl));
rtnl_unlock();
return err;
}
static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp)
{
enum mlxsw_reg_rauhtd_type type;
char *rauhtd_pl;
int err;
rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL);
if (!rauhtd_pl)
return -ENOMEM;
type = MLXSW_REG_RAUHTD_TYPE_IPV4;
err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type);
if (err)
goto out;
type = MLXSW_REG_RAUHTD_TYPE_IPV6;
err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type);
out:
kfree(rauhtd_pl);
return err;
}
static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
/* Take RTNL mutex here to prevent lists from changes */
rtnl_lock();
list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list,
nexthop_neighs_list_node)
/* If this neigh have nexthops, make the kernel think this neigh
* is active regardless of the traffic.
*/
neigh_event_send(neigh_entry->key.n, NULL);
rtnl_unlock();
}
static void
mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval = mlxsw_sp->router->neighs_update.interval;
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw,
msecs_to_jiffies(interval));
}
static void mlxsw_sp_router_neighs_update_work(struct work_struct *work)
{
struct mlxsw_sp_router *router;
int err;
router = container_of(work, struct mlxsw_sp_router,
neighs_update.dw.work);
err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp);
if (err)
dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity");
mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp);
mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp);
}
static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_router *router;
router = container_of(work, struct mlxsw_sp_router,
nexthop_probe_dw.work);
/* Iterate over nexthop neighbours, find those who are unresolved and
* send arp on them. This solves the chicken-egg problem when
* the nexthop wouldn't get offloaded until the neighbor is resolved
* but it wouldn't get resolved ever in case traffic is flowing in HW
* using different nexthop.
*
* Take RTNL mutex here to prevent lists from changes.
*/
rtnl_lock();
list_for_each_entry(neigh_entry, &router->nexthop_neighs_list,
nexthop_neighs_list_node)
if (!neigh_entry->connected)
neigh_event_send(neigh_entry->key.n, NULL);
rtnl_unlock();
mlxsw_core_schedule_dw(&router->nexthop_probe_dw,
MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL);
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing);
static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding)
{
return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD :
MLXSW_REG_RAUHT_OP_WRITE_DELETE;
}
static void
mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
enum mlxsw_reg_rauht_op op)
{
struct neighbour *n = neigh_entry->key.n;
u32 dip = ntohl(*((__be32 *) n->primary_key));
char rauht_pl[MLXSW_REG_RAUHT_LEN];
mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha,
dip);
if (neigh_entry->counter_valid)
mlxsw_reg_rauht_pack_counter(rauht_pl,
neigh_entry->counter_index);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
static void
mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
enum mlxsw_reg_rauht_op op)
{
struct neighbour *n = neigh_entry->key.n;
char rauht_pl[MLXSW_REG_RAUHT_LEN];
const char *dip = n->primary_key;
mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha,
dip);
if (neigh_entry->counter_valid)
mlxsw_reg_rauht_pack_counter(rauht_pl,
neigh_entry->counter_index);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n = neigh_entry->key.n;
/* Packets with a link-local destination address are trapped
* after LPM lookup and never reach the neighbour table, so
* there is no need to program such neighbours to the device.
*/
if (ipv6_addr_type((struct in6_addr *) &n->primary_key) &
IPV6_ADDR_LINKLOCAL)
return true;
return false;
}
static void
mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool adding)
{
if (!adding && !neigh_entry->connected)
return;
neigh_entry->connected = adding;
if (neigh_entry->key.n->tbl->family == AF_INET) {
mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry,
mlxsw_sp_rauht_op(adding));
} else if (neigh_entry->key.n->tbl->family == AF_INET6) {
if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry))
return;
mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry,
mlxsw_sp_rauht_op(adding));
} else {
WARN_ON_ONCE(1);
}
}
void
mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool adding)
{
if (adding)
mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry);
else
mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true);
}
struct mlxsw_sp_netevent_work {
struct work_struct work;
struct mlxsw_sp *mlxsw_sp;
struct neighbour *n;
};
static void mlxsw_sp_router_neigh_event_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
struct mlxsw_sp_neigh_entry *neigh_entry;
struct neighbour *n = net_work->n;
unsigned char ha[ETH_ALEN];
bool entry_connected;
u8 nud_state, dead;
/* If these parameters are changed after we release the lock,
* then we are guaranteed to receive another event letting us
* know about it.
*/
read_lock_bh(&n->lock);
memcpy(ha, n->ha, ETH_ALEN);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
rtnl_lock();
mlxsw_sp_span_respin(mlxsw_sp);
entry_connected = nud_state & NUD_VALID && !dead;
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!entry_connected && !neigh_entry)
goto out;
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry))
goto out;
}
memcpy(neigh_entry->ha, ha, ETH_ALEN);
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected);
mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
out:
rtnl_unlock();
neigh_release(n);
kfree(net_work);
}
static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
mlxsw_sp_mp_hash_init(mlxsw_sp);
kfree(net_work);
}
static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_router_update_priority_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
__mlxsw_sp_router_init(mlxsw_sp);
kfree(net_work);
}
static int mlxsw_sp_router_schedule_work(struct net *net,
struct notifier_block *nb,
void (*cb)(struct work_struct *))
{
struct mlxsw_sp_netevent_work *net_work;
struct mlxsw_sp_router *router;
if (!net_eq(net, &init_net))
return NOTIFY_DONE;
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
router = container_of(nb, struct mlxsw_sp_router, netevent_nb);
INIT_WORK(&net_work->work, cb);
net_work->mlxsw_sp = router->mlxsw_sp;
mlxsw_core_schedule_work(&net_work->work);
return NOTIFY_DONE;
}
static int mlxsw_sp_router_netevent_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct mlxsw_sp_netevent_work *net_work;
struct mlxsw_sp_port *mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp;
unsigned long interval;
struct neigh_parms *p;
struct neighbour *n;
switch (event) {
case NETEVENT_DELAY_PROBE_TIME_UPDATE:
p = ptr;
/* We don't care about changes in the default table. */
if (!p->dev || (p->tbl->family != AF_INET &&
p->tbl->family != AF_INET6))
return NOTIFY_DONE;
/* We are in atomic context and can't take RTNL mutex,
* so use RCU variant to walk the device chain.
*/
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME));
mlxsw_sp->router->neighs_update.interval = interval;
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
case NETEVENT_NEIGH_UPDATE:
n = ptr;
if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6)
return NOTIFY_DONE;
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work) {
mlxsw_sp_port_dev_put(mlxsw_sp_port);
return NOTIFY_BAD;
}
INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work);
net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
net_work->n = n;
/* Take a reference to ensure the neighbour won't be
* destructed until we drop the reference in delayed
* work.
*/
neigh_clone(n);
mlxsw_core_schedule_work(&net_work->work);
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
case NETEVENT_IPV4_MPATH_HASH_UPDATE:
case NETEVENT_IPV6_MPATH_HASH_UPDATE:
return mlxsw_sp_router_schedule_work(ptr, nb,
mlxsw_sp_router_mp_hash_event_work);
case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE:
return mlxsw_sp_router_schedule_work(ptr, nb,
mlxsw_sp_router_update_priority_work);
}
return NOTIFY_DONE;
}
static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp)
{
int err;
err = rhashtable_init(&mlxsw_sp->router->neigh_ht,
&mlxsw_sp_neigh_ht_params);
if (err)
return err;
/* Initialize the polling interval according to the default
* table.
*/
mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp);
/* Create the delayed works for the activity_update */
INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw,
mlxsw_sp_router_neighs_update_work);
INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw,
mlxsw_sp_router_probe_unresolved_nexthops);
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0);
mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0);
return 0;
}
static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp)
{
cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw);
cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw);
rhashtable_destroy(&mlxsw_sp->router->neigh_ht);
}
static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry, *tmp;
list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list,
rif_list_node) {
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false);
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
}
}
enum mlxsw_sp_nexthop_type {
MLXSW_SP_NEXTHOP_TYPE_ETH,
MLXSW_SP_NEXTHOP_TYPE_IPIP,
};
struct mlxsw_sp_nexthop_key {
struct fib_nh *fib_nh;
};
struct mlxsw_sp_nexthop {
struct list_head neigh_list_node; /* member of neigh entry list */
struct list_head rif_list_node;
struct list_head router_list_node;
struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group
* this belongs to
*/
struct rhash_head ht_node;
struct mlxsw_sp_nexthop_key key;
unsigned char gw_addr[sizeof(struct in6_addr)];
int ifindex;
int nh_weight;
int norm_nh_weight;
int num_adj_entries;
struct mlxsw_sp_rif *rif;
u8 should_offload:1, /* set indicates this neigh is connected and
* should be put to KVD linear area of this group.
*/
offloaded:1, /* set in case the neigh is actually put into
* KVD linear area of this group.
*/
update:1; /* set indicates that MAC of this neigh should be
* updated in HW
*/
enum mlxsw_sp_nexthop_type type;
union {
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_ipip_entry *ipip_entry;
};
unsigned int counter_index;
bool counter_valid;
};
struct mlxsw_sp_nexthop_group {
void *priv;
struct rhash_head ht_node;
struct list_head fib_list; /* list of fib entries that use this group */
struct neigh_table *neigh_tbl;
u8 adj_index_valid:1,
gateway:1; /* routes using the group use a gateway */
u32 adj_index;
u16 ecmp_size;
u16 count;
int sum_norm_weight;
struct mlxsw_sp_nexthop nexthops[0];
#define nh_rif nexthops[0].rif
};
void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct devlink *devlink;
devlink = priv_to_devlink(mlxsw_sp->core);
if (!devlink_dpipe_table_counter_enabled(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ADJ))
return;
if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index))
return;
nh->counter_valid = true;
}
void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
if (!nh->counter_valid)
return;
mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index);
nh->counter_valid = false;
}
int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh, u64 *p_counter)
{
if (!nh->counter_valid)
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index,
p_counter, NULL);
}
struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router,
struct mlxsw_sp_nexthop *nh)
{
if (!nh) {
if (list_empty(&router->nexthop_list))
return NULL;
else
return list_first_entry(&router->nexthop_list,
typeof(*nh), router_list_node);
}
if (list_is_last(&nh->router_list_node, &router->nexthop_list))
return NULL;
return list_next_entry(nh, router_list_node);
}
bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh)
{
return nh->offloaded;
}
unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh)
{
if (!nh->offloaded)
return NULL;
return nh->neigh_entry->ha;
}
int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
u32 *p_adj_size, u32 *p_adj_hash_index)
{
struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp;
u32 adj_hash_index = 0;
int i;
if (!nh->offloaded || !nh_grp->adj_index_valid)
return -EINVAL;
*p_adj_index = nh_grp->adj_index;
*p_adj_size = nh_grp->ecmp_size;
for (i = 0; i < nh_grp->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i];
if (nh_iter == nh)
break;
if (nh_iter->offloaded)
adj_hash_index += nh_iter->num_adj_entries;
}
*p_adj_hash_index = adj_hash_index;
return 0;
}
struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh)
{
return nh->rif;
}
bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp;
int i;
for (i = 0; i < nh_grp->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i];
if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP)
return true;
}
return