#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/if_macvlan.h>
#include <linux/refcount.h>
#include <linux/jhash.h>
#include <linux/net_namespace.h>
#include <linux/mutex.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/nexthop.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_rif {
struct list_head nexthop_list;
struct list_head neigh_list;
struct net_device *dev;
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;
u16 ul_rif_id;
};
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 struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev);
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,
MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE,
MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP,
MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP,
};
struct mlxsw_sp_nexthop_group_info;
struct mlxsw_sp_nexthop_group;
struct mlxsw_sp_fib_entry;
struct mlxsw_sp_fib_node {
struct mlxsw_sp_fib_entry *fib_entry;
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;
};
static struct mlxsw_sp_fib_entry_priv *
mlxsw_sp_fib_entry_priv_create(const struct mlxsw_sp_router_ll_ops *ll_ops)
{
struct mlxsw_sp_fib_entry_priv *priv;
if (!ll_ops->fib_entry_priv_size)
return NULL;
priv = kzalloc(sizeof(*priv) + ll_ops->fib_entry_priv_size, GFP_KERNEL);
if (!priv)
return ERR_PTR(-ENOMEM);
refcount_set(&priv->refcnt, 1);
return priv;
}
static void
mlxsw_sp_fib_entry_priv_destroy(struct mlxsw_sp_fib_entry_priv *priv)
{
kfree(priv);
}
static void mlxsw_sp_fib_entry_priv_hold(struct mlxsw_sp_fib_entry_priv *priv)
{
refcount_inc(&priv->refcnt);
}
static void mlxsw_sp_fib_entry_priv_put(struct mlxsw_sp_fib_entry_priv *priv)
{
if (!priv || !refcount_dec_and_test(&priv->refcnt))
return;
mlxsw_sp_fib_entry_priv_destroy(priv);
}
static void mlxsw_sp_fib_entry_op_ctx_priv_hold(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry_priv *priv)
{
if (!priv)
return;
mlxsw_sp_fib_entry_priv_hold(priv);
list_add(&priv->list, &op_ctx->fib_entry_priv_list);
}
static void mlxsw_sp_fib_entry_op_ctx_priv_put_all(struct mlxsw_sp_fib_entry_op_ctx *op_ctx)
{
struct mlxsw_sp_fib_entry_priv *priv, *tmp;
list_for_each_entry_safe(priv, tmp, &op_ctx->fib_entry_priv_list, list)
mlxsw_sp_fib_entry_priv_put(priv);
INIT_LIST_HEAD(&op_ctx->fib_entry_priv_list);
}
struct mlxsw_sp_fib_entry {
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;
struct mlxsw_sp_fib_entry_priv *priv;
};
struct mlxsw_sp_fib4_entry {
struct mlxsw_sp_fib_entry common;
struct fib_info *fi;
u32 tb_id;
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;
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;
const struct mlxsw_sp_router_ll_ops *ll_ops;
};
struct mlxsw_sp_vr {
u16 id;
u32 tb_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 int mlxsw_sp_router_ll_basic_init(struct mlxsw_sp *mlxsw_sp, u16 vr_id,
enum mlxsw_sp_l3proto proto)
{
return 0;
}
static int mlxsw_sp_router_ll_basic_ralta_write(struct mlxsw_sp *mlxsw_sp, char *xralta_pl)
{
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta),
xralta_pl + MLXSW_REG_XRALTA_RALTA_OFFSET);
}
static int mlxsw_sp_router_ll_basic_ralst_write(struct mlxsw_sp *mlxsw_sp, char *xralst_pl)
{
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst),
xralst_pl + MLXSW_REG_XRALST_RALST_OFFSET);
}
static int mlxsw_sp_router_ll_basic_raltb_write(struct mlxsw_sp *mlxsw_sp, char *xraltb_pl)
{
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb),
xraltb_pl + MLXSW_REG_XRALTB_RALTB_OFFSET);
}
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)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = mlxsw_sp->router->proto_ll_ops[proto];
struct mlxsw_sp_lpm_tree *lpm_tree;
struct mlxsw_sp_fib *fib;
int err;
err = ll_ops->init(mlxsw_sp, vr->id, proto);
if (err)
return ERR_PTR(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;
fib->ll_ops = ll_ops;
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,
const struct mlxsw_sp_router_ll_ops *ll_ops,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char xralta_pl[MLXSW_REG_XRALTA_LEN];
mlxsw_reg_xralta_pack(xralta_pl, true,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
return ll_ops->ralta_write(mlxsw_sp, xralta_pl);
}
static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_router_ll_ops *ll_ops,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char xralta_pl[MLXSW_REG_XRALTA_LEN];
mlxsw_reg_xralta_pack(xralta_pl, false,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
ll_ops->ralta_write(mlxsw_sp, xralta_pl);
}
static int
mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_router_ll_ops *ll_ops,
struct mlxsw_sp_prefix_usage *prefix_usage,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char xralst_pl[MLXSW_REG_XRALST_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_xralst_pack(xralst_pl, root_bin, lpm_tree->id);
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) {
if (prefix == 0)
continue;
mlxsw_reg_xralst_bin_pack(xralst_pl, prefix, last_prefix,
MLXSW_REG_RALST_BIN_NO_CHILD);
last_prefix = prefix;
}
return ll_ops->ralst_write(mlxsw_sp, xralst_pl);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_router_ll_ops *ll_ops,
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, ll_ops, lpm_tree);
if (err)
return ERR_PTR(err);
err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, ll_ops, 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, ll_ops, lpm_tree);
return ERR_PTR(err);
}
static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_router_ll_ops *ll_ops,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
mlxsw_sp_lpm_tree_free(mlxsw_sp, ll_ops, 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)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = mlxsw_sp->router->proto_ll_ops[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, ll_ops, 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)
{
const struct mlxsw_sp_router_ll_ops *ll_ops =
mlxsw_sp->router->proto_ll_ops[lpm_tree->proto];
if (--lpm_tree->ref_count == 0)
mlxsw_sp_lpm_tree_destroy(mlxsw_sp, ll_ops, 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 xraltb_pl[MLXSW_REG_XRALTB_LEN];
mlxsw_reg_xraltb_pack(xraltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto,
tree_id);
return fib->ll_ops->raltb_write(mlxsw_sp, xraltb_pl);
}
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib)
{
char xraltb_pl[MLXSW_REG_XRALTB_LEN];
mlxsw_reg_xraltb_pack(xraltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
return fib->ll_ops->raltb_write(mlxsw_sp, xraltb_pl);
}
static u32 mlxsw_sp_fix_tb_id(u32 tb_id)
{
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;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr) {
err = -ESRCH;
goto out;
}
*vr_id = vr->id;
out:
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
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)
{
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_rcu(net, tun->parms.link);
}
u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev)
{
struct net_device *d;
u32 tb_id;
rcu_read_lock();
d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
if (d)
tb_id = l3mdev_fib_table(d) ? : RT_TABLE_MAIN;
else
tb_id = RT_TABLE_MAIN;
rcu_read_unlock();
return tb_id;
}
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)
{
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_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:
default:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len,
addr_prefix_len);
if (!fib_node || fib_node->fib_entry->type != type)
return NULL;
return fib_node->fib_entry;
}
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;
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;
default:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len,
saddr_prefix_len);
if (!fib_node ||
fib_node->fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP)
return NULL;
return fib_node->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);
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, int ul_dev_ifindex,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr ul_dip)
{
struct mlxsw_sp_ipip_entry *ipip_entry = NULL;
struct net_device *ul_dev;
rcu_read_lock();
ul_dev = dev_get_by_index_rcu(mlxsw_sp_net(mlxsw_sp), ul_dev_ifindex);
if (!ul_dev)
goto out_unlock;
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))
goto out_unlock;
rcu_read_unlock();
return NULL;
out_unlock:
rcu_read_unlock();
return ipip_entry;
}
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 *ol_dev = ipip_entry->ol_dev;
struct net_device *ipip_ul_dev;
rcu_read_lock();
ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
rcu_read_unlock();
if (ipip_ul_dev == ul_dev)
return ipip_entry;
}
return NULL;
}
bool mlxsw_sp_netdev_is_ipip_ul(struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
bool is_ipip_ul;
mutex_lock(&mlxsw_sp->router->lock);
is_ipip_ul = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL);
mutex_unlock(&mlxsw_sp->router->lock);
return is_ipip_ul;
}
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];
return ops->can_offload(mlxsw_sp, ol_dev);
}
static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
enum mlxsw_sp_ipip_type ipipt = MLXSW_SP_IPIP_TYPE_MAX;
struct mlxsw_sp_ipip_entry *ipip_entry;
enum mlxsw_sp_l3proto ul_proto;
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);
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;
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);
if (!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,
bool *demote_this,
struct netlink_ext_ack *extack)
{
u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN;
enum mlxsw_sp_l3proto ul_proto;
union mlxsw_sp_l3addr saddr;
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev);
if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
ipip_entry)) {
*demote_this = true;
return 0;
}
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)
{
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)
return 0;
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);
}
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 *ol_dev = ipip_entry->ol_dev;
struct net_device *ipip_ul_dev;
rcu_read_lock();
ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
rcu_read_unlock();
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;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
switch (event) {
case NETDEV_REGISTER:
err = mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev);
break;
case NETDEV_UNREGISTER:
mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev);
break;
case NETDEV_UP:
mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev);
break;
case NETDEV_DOWN:
mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev);
break;
case NETDEV_CHANGEUPPER:
chup = container_of(info, typeof(*chup), info);
extack = info->extack;
if (netif_is_l3_master(chup->upper_dev))
err = mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp,
ol_dev,
extack);
break;
case NETDEV_CHANGE:
extack = info->extack;
err = mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp,
ol_dev, extack);
break;
case NETDEV_CHANGEMTU:
err = mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev);
break;
}
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
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,
bool *demote_this,
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,
demote_this,
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 = 0;
mutex_lock(&mlxsw_sp->router->lock);
while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp,
ul_dev,
ipip_entry))) {
struct mlxsw_sp_ipip_entry *prev;
bool demote_this = false;
err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry,
ul_dev, &demote_this,
event, info);
if (err) {
mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp,
ul_dev);
break;
}
if (demote_this) {
if (list_is_first(&ipip_entry->ipip_list_node,
&mlxsw_sp->router->ipip_list))
prev = NULL;
else
prev = list_prev_entry(ipip_entry,
ipip_list_node);
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
ipip_entry = prev;
}
}
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
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_router *router = mlxsw_sp->router;
struct mlxsw_sp_fib_entry *fib_entry;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
if (WARN_ON_ONCE(router->nve_decap_config.valid)) {
err = -EINVAL;
goto out;
}
router->nve_decap_config.ul_tb_id = ul_tb_id;
router->nve_decap_config.tunnel_index = tunnel_index;
router->nve_decap_config.ul_proto = ul_proto;
router->nve_decap_config.ul_sip = *ul_sip;
router->nve_decap_config.valid = true;
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
goto out;
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;
goto out;
err_fib_entry_update:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
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_router *router = mlxsw_sp->router;
struct mlxsw_sp_fib_entry *fib_entry;
mutex_lock(&mlxsw_sp->router->lock);
if (WARN_ON_ONCE(!router->nve_decap_config.valid))
goto out;
router->nve_decap_config.valid = false;
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
goto out;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
}
static bool mlxsw_sp_router_nve_is_decap(struct mlxsw_sp *mlxsw_sp,
u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
return router->nve_decap_config.valid &&
router->nve_decap_config.ul_tb_id == ul_tb_id &&
router->nve_decap_config.ul_proto == ul_proto &&
!memcmp(&router->nve_decap_config.ul_sip, ul_sip,
sizeof(*ul_sip));
}
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;
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);
num_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)
{
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;
mutex_lock(&mlxsw_sp->router->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));
mutex_unlock(&mlxsw_sp->router->lock);
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;
mutex_lock(&mlxsw_sp->router->lock);
list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list,
nexthop_neighs_list_node)
neigh_event_send(neigh_entry->key.n, NULL);
mutex_unlock(&mlxsw_sp->router->lock);
}
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);
mutex_lock(&router->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);
mutex_unlock(&router->lock);
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, bool dead);
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 int
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);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
static int
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);
return 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;
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)
{
enum mlxsw_reg_rauht_op op = mlxsw_sp_rauht_op(adding);
int err;
if (!adding && !neigh_entry->connected)
return;
neigh_entry->connected = adding;
if (neigh_entry->key.n->tbl->family == AF_INET) {
err = mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry,
op);
if (err)
return;
} else if (neigh_entry->key.n->tbl->family == AF_INET6) {
if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry))
return;
err = mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry,
op);
if (err)
return;
} else {
WARN_ON_ONCE(1);
return;
}
if (adding)
neigh_entry->key.n->flags |= NTF_OFFLOADED;
else
neigh_entry->key.n->flags &= ~NTF_OFFLOADED;
}
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;
read_lock_bh(&n->lock);
memcpy(ha, n->ha, ETH_ALEN);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
mutex_lock(&mlxsw_sp->router->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,
dead);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
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;
router = container_of(nb, struct mlxsw_sp_router, netevent_nb);
if (!net_eq(net, mlxsw_sp_net(router->mlxsw_sp)))
return NOTIFY_DONE;
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
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;
if (!p->dev || (p->tbl->family != AF_INET &&
p->tbl->family != AF_INET6))
return NOTIFY_DONE;
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;
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;
mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp);
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;
struct list_head rif_list_node;
struct list_head router_list_node;
struct mlxsw_sp_nexthop_group_info *nhgi;
struct rhash_head ht_node;
struct neigh_table *neigh_tbl;
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,
offloaded:1,
update:1,
discard:1;
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;
};
enum mlxsw_sp_nexthop_group_type {
MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4,
MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6,
MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ,
};
struct mlxsw_sp_nexthop_group_info {
struct mlxsw_sp_nexthop_group *nh_grp;
u32 adj_index;
u16 ecmp_size;
u16 count;
int sum_norm_weight;
u8 adj_index_valid:1,
gateway:1;
struct mlxsw_sp_nexthop nexthops[0];
#define nh_rif nexthops[0].rif
};
struct mlxsw_sp_nexthop_group_vr_key {
u16 vr_id;
enum mlxsw_sp_l3proto proto;
};
struct mlxsw_sp_nexthop_group_vr_entry {
struct list_head list;
struct rhash_head ht_node;
refcount_t ref_count;
struct mlxsw_sp_nexthop_group_vr_key key;
};
struct mlxsw_sp_nexthop_group {
struct rhash_head ht_node;
struct list_head fib_list;
union {
struct {
struct fib_info *fi;
} ipv4;
struct {
u32 id;
} obj;
};
struct mlxsw_sp_nexthop_group_info *nhgi;
struct list_head vr_list;
struct rhashtable vr_ht;
enum mlxsw_sp_nexthop_group_type type;
bool can_destroy;
};
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_info *nhgi = nh->nhgi;
u32 adj_hash_index = 0;
int i;
if (!nh->offloaded || !nhgi->adj_index_valid)
return -EINVAL;
*p_adj_index = nhgi->adj_index;
*p_adj_size = nhgi->ecmp_size;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nhgi->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_info *nhgi = nh->nhgi;
int i;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nhgi->nexthops[i];
if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP)
return true;
}
return false;
}
bool mlxsw_sp_nexthop_is_discard(const struct mlxsw_sp_nexthop *nh)
{
return nh->discard;
}
static const struct rhashtable_params mlxsw_sp_nexthop_group_vr_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_group_vr_key),
.automatic_shrinking = true,
};
static struct mlxsw_sp_nexthop_group_vr_entry *
mlxsw_sp_nexthop_group_vr_entry_lookup(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_key key;
memset(&key, 0, sizeof(key));
key.vr_id = fib->vr->id;
key.proto = fib->proto;
return rhashtable_lookup_fast(&nh_grp->vr_ht, &key,
mlxsw_sp_nexthop_group_vr_ht_params);
}
static int
mlxsw_sp_nexthop_group_vr_entry_create(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
int err;
vr_entry = kzalloc(sizeof(*vr_entry), GFP_KERNEL);
if (!vr_entry)
return -ENOMEM;
vr_entry->key.vr_id = fib->vr->id;
vr_entry->key.proto = fib->proto;
refcount_set(&vr_entry->ref_count, 1);
err = rhashtable_insert_fast(&nh_grp->vr_ht, &vr_entry->ht_node,
mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_hashtable_insert;
list_add(&vr_entry->list, &nh_grp->vr_list);
return 0;
err_hashtable_insert:
kfree(vr_entry);
return err;
}
static void
mlxsw_sp_nexthop_group_vr_entry_destroy(struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry)
{
list_del(&vr_entry->list);
rhashtable_remove_fast(&nh_grp->vr_ht, &vr_entry->ht_node,
mlxsw_sp_nexthop_group_vr_ht_params);
kfree(vr_entry);
}
static int
mlxsw_sp_nexthop_group_vr_link(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib);
if (vr_entry) {
refcount_inc(&vr_entry->ref_count);
return 0;
}
return mlxsw_sp_nexthop_group_vr_entry_create(nh_grp, fib);
}
static void
mlxsw_sp_nexthop_group_vr_unlink(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib);
if (WARN_ON_ONCE(!vr_entry))
return;
if (!refcount_dec_and_test(&vr_entry->ref_count))
return;
mlxsw_sp_nexthop_group_vr_entry_destroy(nh_grp, vr_entry);
}
struct mlxsw_sp_nexthop_group_cmp_arg {
enum mlxsw_sp_nexthop_group_type type;
union {
struct fib_info *fi;
struct mlxsw_sp_fib6_entry *fib6_entry;
u32 id;
};
};
static bool
mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct in6_addr *gw, int ifindex,
int weight)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
const struct mlxsw_sp_nexthop *nh;
nh = &nh_grp->nhgi->nexthops[i];
if (nh->ifindex == ifindex && nh->nh_weight == weight &&
ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr))
return true;
}
return false;
}
static bool
mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
if (nh_grp->nhgi->count != fib6_entry->nrt6)
return false;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct in6_addr *gw;
int ifindex, weight;
ifindex = fib6_nh->fib_nh_dev->ifindex;
weight = fib6_nh->fib_nh_weight;
gw = &fib6_nh->fib_nh_gw6;
if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex,
weight))
return false;
}
return true;
}
static int
mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr)
{
const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key;
const struct mlxsw_sp_nexthop_group *nh_grp = ptr;
if (nh_grp->type != cmp_arg->type)
return 1;
switch (cmp_arg->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
return cmp_arg->fi != nh_grp->ipv4.fi;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
return !mlxsw_sp_nexthop6_group_cmp(nh_grp,
cmp_arg->fib6_entry);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return cmp_arg->id != nh_grp->obj.id;
default:
WARN_ON(1);
return 1;
}
}
static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed)
{
const struct mlxsw_sp_nexthop_group *nh_grp = data;
const struct mlxsw_sp_nexthop *nh;
struct fib_info *fi;
unsigned int val;
int i;
switch (nh_grp->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
fi = nh_grp->ipv4.fi;
return jhash(&fi, sizeof(fi), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
val = nh_grp->nhgi->count;
for (i = 0; i < nh_grp->nhgi->count; i++) {
nh = &nh_grp->nhgi->nexthops[i];
val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
val ^= jhash(&nh->gw_addr, sizeof(nh->gw_addr), seed);
}
return jhash(&val, sizeof(val), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return jhash(&nh_grp->obj.id, sizeof(nh_grp->obj.id), seed);
default:
WARN_ON(1);
return 0;
}
}
static u32
mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed)
{
unsigned int val = fib6_entry->nrt6;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct net_device *dev = fib6_nh->fib_nh_dev;
struct in6_addr *gw = &fib6_nh->fib_nh_gw6;
val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), seed);
val ^= jhash(gw, sizeof(*gw), seed);
}
return jhash(&val, sizeof(val), seed);
}
static u32
mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed)
{
const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data;
switch (cmp_arg->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return jhash(&cmp_arg->id, sizeof(cmp_arg->id), seed);
default:
WARN_ON(1);
return 0;
}
}
static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = {
.head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node),
.hashfn = mlxsw_sp_nexthop_group_hash,
.obj_hashfn = mlxsw_sp_nexthop_group_hash_obj,
.obj_cmpfn = mlxsw_sp_nexthop_group_cmp,
};
static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 &&
!nh_grp->nhgi->gateway)
return 0;
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 &&
!nh_grp->nhgi->gateway)
return;
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp,
struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4;
cmp_arg.fi = fi;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6;
cmp_arg.fib6_entry = fib6_entry;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_key),
};
static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht,
&nh->ht_node, mlxsw_sp_nexthop_ht_params);
}
static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node,
mlxsw_sp_nexthop_ht_params);
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_key key)
{
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key,
mlxsw_sp_nexthop_ht_params);
}
static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_l3proto proto,
u16 vr_id,
u32 adj_index, u16 ecmp_size,
u32 new_adj_index,
u16 new_ecmp_size)
{
char raleu_pl[MLXSW_REG_RALEU_LEN];
mlxsw_reg_raleu_pack(raleu_pl,
(enum mlxsw_reg_ralxx_protocol) proto, vr_id,
adj_index, ecmp_size, new_adj_index,
new_ecmp_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl);
}
static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
u32 old_adj_index, u16 old_ecmp_size)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
int err;
list_for_each_entry(vr_entry, &nh_grp->vr_list, list) {
err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp,
vr_entry->key.proto,
vr_entry->key.vr_id,
old_adj_index,
old_ecmp_size,
nhgi->adj_index,
nhgi->ecmp_size);
if (err)
goto err_mass_update_vr;
}
return 0;
err_mass_update_vr:
list_for_each_entry_continue_reverse(vr_entry, &nh_grp->vr_list, list)
mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, vr_entry->key.proto,
vr_entry->key.vr_id,
nhgi->adj_index,
nhgi->ecmp_size,
old_adj_index, old_ecmp_size);
return err;
}
static int __mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
char ratr_pl[MLXSW_REG_RATR_LEN];
mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY,
true, MLXSW_REG_RATR_TYPE_ETHERNET,
adj_index, nh->rif->rif_index);
if (nh->discard)
mlxsw_reg_ratr_trap_action_set(ratr_pl,
MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS);
else
mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha);
if (nh->counter_valid)
mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true);
else
mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}
int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
struct mlxsw_sp_nexthop *nh)
{
int i;
for (i = 0; i < nh->num_adj_entries; i++) {
int err;
err = __mlxsw_sp_nexthop_update(mlxsw_sp, adj_index + i, nh);
if (err)
return err;
}
return 0;
}
static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
u32 adj_index,
struct mlxsw_sp_nexthop *nh)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt];
return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry);
}
static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
u32 adj_index,
struct mlxsw_sp_nexthop *nh)
{
int i;
for (i = 0; i < nh->num_adj_entries; i++) {
int err;
err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i,
nh);
if (err)
return err;
}
return 0;
}
static int
mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group_info *nhgi,
bool reallocate)
{
u32 adj_index = nhgi->adj_index;
struct mlxsw_sp_nexthop *nh;
int i;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload) {
nh->offloaded = 0;
continue;
}
if (nh->update || reallocate) {
int err = 0;
switch (nh->type) {
case MLXSW_SP_NEXTHOP_TYPE_ETH:
err = mlxsw_sp_nexthop_update
(mlxsw_sp, adj_index, nh);
break;
case MLXSW_SP_NEXTHOP_TYPE_IPIP:
err = mlxsw_sp_nexthop_ipip_update
(mlxsw_sp, adj_index, nh);
break;
}
if (err)
return err;
nh->update = 0;
nh->offloaded = 1;
}
adj_index += nh->num_adj_entries;
}
return 0;
}
static int
mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_fib_entry *fib_entry;
int err;
list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) {
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
return err;
}
return 0;
}
static void mlxsw_sp_adj_grp_size_round_up(u16 *p_adj_grp_size)
{
if (*p_adj_grp_size <= 64)
return;
else if (*p_adj_grp_size <= 512)
*p_adj_grp_size = 512;
else if (*p_adj_grp_size <= 1024)
*p_adj_grp_size = 1024;
else if (*p_adj_grp_size <= 2048)
*p_adj_grp_size = 2048;
else
*p_adj_grp_size = 4096;
}
static void mlxsw_sp_adj_grp_size_round_down(u16 *p_adj_grp_size,
unsigned int alloc_size)
{
if (alloc_size >= 4096)
*p_adj_grp_size = 4096;
else if (alloc_size >= 2048)
*p_adj_grp_size = 2048;
else if (alloc_size >= 1024)
*p_adj_grp_size = 1024;
else if (alloc_size >= 512)
*p_adj_grp_size = 512;
}
static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp,
u16 *p_adj_grp_size)
{
unsigned int alloc_size;
int err;
mlxsw_sp_adj_grp_size_round_up(p_adj_grp_size);
err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp,
MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
*p_adj_grp_size, &alloc_size);
if (err)
return err;
mlxsw_sp_adj_grp_size_round_down(p_adj_grp_size, alloc_size);
return 0;
}
static void
mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group_info *nhgi)
{
int i, g = 0, sum_norm_weight = 0;
struct mlxsw_sp_nexthop *nh;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload)
continue;
if (g > 0)
g = gcd(nh->nh_weight, g);
else
g = nh->nh_weight;
}
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload)
continue;
nh->norm_nh_weight = nh->nh_weight / g;
sum_norm_weight += nh->norm_nh_weight;
}
nhgi->sum_norm_weight = sum_norm_weight;
}
static void
mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group_info *nhgi)
{
int i, weight = 0, lower_bound = 0;
int total = nhgi->sum_norm_weight;
u16 ecmp_size = nhgi->ecmp_size;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
int upper_bound;
if (!nh->should_offload)
continue;
weight += nh->norm_nh_weight;
upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total);
nh->num_adj_entries = upper_bound - lower_bound;
lower_bound = upper_bound;
}
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_rt6 *mlxsw_sp_rt6);
static void
mlxsw_sp_nexthop4_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i];
if (nh->offloaded)
nh->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD;
else
nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
}
}
static void
__mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct mlxsw_sp_nexthop *nh;
nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6);
if (nh && nh->offloaded)
fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD;
else
fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
}
}
static void
mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
list_for_each_entry(fib6_entry, &nh_grp->fib_list,
common.nexthop_group_node)
__mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry);
}
static void
mlxsw_sp_nexthop_obj_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (nh_grp->can_destroy)
return;
nexthop_set_hw_flags(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id,
nh_grp->nhgi->adj_index_valid, false);
}
static void
mlxsw_sp_nexthop_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
switch (nh_grp->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
mlxsw_sp_nexthop4_group_offload_refresh(mlxsw_sp, nh_grp);
break;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
mlxsw_sp_nexthop6_group_offload_refresh(mlxsw_sp, nh_grp);
break;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, nh_grp);
break;
}
}
static int
mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
u16 ecmp_size, old_ecmp_size;
struct mlxsw_sp_nexthop *nh;
bool offload_change = false;
u32 adj_index;
bool old_adj_index_valid;
int i, err2, err = 0;
u32 old_adj_index;
if (!nhgi->gateway)
return mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (nh->should_offload != nh->offloaded) {
offload_change = true;
if (nh->should_offload)
nh->update = 1;
}
}
if (!offload_change) {
err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, false);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
return 0;
}
mlxsw_sp_nexthop_group_normalize(nhgi);
if (!nhgi->sum_norm_weight)
goto set_trap;
ecmp_size = nhgi->sum_norm_weight;
err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size);
if (err)
goto set_trap;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
ecmp_size, &adj_index);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n");
goto set_trap;
}
old_adj_index_valid = nhgi->adj_index_valid;
old_adj_index = nhgi->adj_index;
old_ecmp_size = nhgi->ecmp_size;
nhgi->adj_index_valid = 1;
nhgi->adj_index = adj_index;
nhgi->ecmp_size = ecmp_size;
mlxsw_sp_nexthop_group_rebalance(nhgi);
err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, true);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp);
if (!old_adj_index_valid) {
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n");
goto set_trap;
}
return 0;
}
err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp,
old_adj_index, old_ecmp_size);
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
old_ecmp_size, old_adj_index);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n");
goto set_trap;
}
return 0;
set_trap:
old_adj_index_valid = nhgi->adj_index_valid;
nhgi->adj_index_valid = 0;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
nh->offloaded = 0;
}
err2 = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err2)
dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n");
mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp);
if (old_adj_index_valid)
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
nhgi->ecmp_size, nhgi->adj_index);
return err;
}
static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh,
bool removing)
{
if (!removing)
nh->should_offload = 1;
else
nh->should_offload = 0;
nh->update = 1;
}
static int
mlxsw_sp_nexthop_dead_neigh_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n, *old_n = neigh_entry->key.n;
struct mlxsw_sp_nexthop *nh;
bool entry_connected;
u8 nud_state, dead;
int err;
nh = list_first_entry(&neigh_entry->nexthop_list,
struct mlxsw_sp_nexthop, neigh_list_node);
n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (!n) {
n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (IS_ERR(n))
return PTR_ERR(n);
neigh_event_send(n, NULL);
}
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
neigh_entry->key.n = n;
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
read_lock_bh(&n->lock);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
entry_connected = nud_state & NUD_VALID && !dead;
list_for_each_entry(nh, &neigh_entry->nexthop_list,
neigh_list_node) {
neigh_release(old_n);
neigh_clone(n);
__mlxsw_sp_nexthop_neigh_update(nh, !entry_connected);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
neigh_release(n);
return 0;
err_neigh_entry_insert:
neigh_entry->key.n = old_n;
mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
neigh_release(n);
return err;
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing, bool dead)
{
struct mlxsw_sp_nexthop *nh;
if (list_empty(&neigh_entry->nexthop_list))
return;
if (dead) {
int err;
err = mlxsw_sp_nexthop_dead_neigh_replace(mlxsw_sp,
neigh_entry);
if (err)
dev_err(mlxsw_sp->bus_info->dev, "Failed to replace dead neigh\n");
return;
}
list_for_each_entry(nh, &neigh_entry->nexthop_list,
neigh_list_node) {
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_rif *rif)
{
if (nh->rif)
return;
nh->rif = rif;
list_add(&nh->rif_list_node, &rif->nexthop_list);
}
static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh)
{
if (!nh->rif)
return;
list_del(&nh->rif_list_node);
nh->rif = NULL;
}
static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct neighbour *n;
u8 nud_state, dead;
int err;
if (!nh->nhgi->gateway || nh->neigh_entry)
return 0;
n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (!n) {
n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (IS_ERR(n))
return PTR_ERR(n);
neigh_event_send(n, NULL);
}
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry)) {
err = -EINVAL;
goto err_neigh_entry_create;
}
}
if (list_empty(&neigh_entry->nexthop_list))
list_add_tail(&neigh_entry->nexthop_neighs_list_node,
&mlxsw_sp->router->nexthop_neighs_list);
nh->neigh_entry = neigh_entry;
list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list);
read_lock_bh(&n->lock);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
__mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead));
return 0;
err_neigh_entry_create:
neigh_release(n);
return err;
}
static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
struct neighbour *n;
if (!neigh_entry)
return;
n = neigh_entry->key.n;
__mlxsw_sp_nexthop_neigh_update(nh, true);
list_del(&nh->neigh_list_node);
nh->neigh_entry = NULL;
if (list_empty(&neigh_entry->nexthop_list))
list_del(&neigh_entry->nexthop_neighs_list_node);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
neigh_release(n);
}
static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev)
{
struct net_device *ul_dev;
bool is_up;
rcu_read_lock();
ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
is_up = ul_dev ? (ul_dev->flags & IFF_UP) : true;
rcu_read_unlock();
return is_up;
}
static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
bool removing;
if (!nh->nhgi->gateway || nh->ipip_entry)
return;
nh->ipip_entry = ipip_entry;
removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev);
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common);
}
static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry;
if (!ipip_entry)
return;
__mlxsw_sp_nexthop_neigh_update(nh, true);
nh->ipip_entry = NULL;
}
static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct fib_nh *fib_nh,
enum mlxsw_sp_ipip_type *p_ipipt)
{
struct net_device *dev = fib_nh->fib_nh_dev;
return dev &&
fib_nh->nh_parent->fib_type == RTN_UNICAST &&
mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt);
}
static int mlxsw_sp_nexthop_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
const struct net_device *dev)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif *rif;
int err;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
mlxsw_sp_nexthop_rif_init(nh, rif);
err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh);
if (err)
goto err_neigh_init;
return 0;
err_neigh_init:
mlxsw_sp_nexthop_rif_fini(nh);
return err;
}
static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
switch (nh->type) {
case MLXSW_SP_NEXTHOP_TYPE_ETH:
mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_rif_fini(nh);
break;
case MLXSW_SP_NEXTHOP_TYPE_IPIP:
mlxsw_sp_nexthop_rif_fini(nh);
mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh);
break;
}
}
static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
struct fib_nh *fib_nh)
{
struct net_device *dev = fib_nh->fib_nh_dev;
struct in_device *in_dev;
int err;
nh->nhgi = nh_grp->nhgi;
nh->key.fib_nh = fib_nh;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
nh->nh_weight = fib_nh->fib_nh_weight;
#else
nh->nh_weight = 1;
#endif
memcpy(&nh->gw_addr, &fib_nh->fib_nh_gw4, sizeof(fib_nh->fib_nh_gw4));
nh->neigh_tbl = &arp_tbl;
err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh);
if (err)
return err;
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
if (!dev)
return 0;
nh->ifindex = dev->ifindex;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) {
rcu_read_unlock();
return 0;
}
rcu_read_unlock();
err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
if (err)
goto err_nexthop_neigh_init;
return 0;
err_nexthop_neigh_init:
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
}
static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp,
unsigned long event, struct fib_nh *fib_nh)
{
struct mlxsw_sp_nexthop_key key;
struct mlxsw_sp_nexthop *nh;
if (mlxsw_sp->router->aborted)
return;
key.fib_nh = fib_nh;
nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key);
if (!nh)
return;
switch (event) {
case FIB_EVENT_NH_ADD:
mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, fib_nh->fib_nh_dev);
break;
case FIB_EVENT_NH_DEL:
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
break;
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_nexthop *nh;
bool removing;
list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) {
switch (nh->type) {
case MLXSW_SP_NEXTHOP_TYPE_ETH:
removing = false;
break;
case MLXSW_SP_NEXTHOP_TYPE_IPIP:
removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev);
break;
default:
WARN_ON(1);
continue;
}
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif)
{
struct mlxsw_sp_nexthop *nh;
list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list);
list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node)
nh->rif = new_rif;
mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif);
}
static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_nexthop *nh, *tmp;
list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) {
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static int
mlxsw_sp_nexthop_obj_single_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_single_info *nh,
struct netlink_ext_ack *extack)
{
int err = -EINVAL;
if (nh->is_fdb)
NL_SET_ERR_MSG_MOD(extack, "FDB nexthops are not supported");
else if (nh->has_encap)
NL_SET_ERR_MSG_MOD(extack, "Encapsulating nexthops are not supported");
else
err = 0;
return err;
}
static int
mlxsw_sp_nexthop_obj_group_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_grp_info *nh_grp,
struct netlink_ext_ack *extack)
{
int i;
if (nh_grp->is_fdb) {
NL_SET_ERR_MSG_MOD(extack, "FDB nexthop groups are not supported");
return -EINVAL;
}
for (i = 0; i < nh_grp->num_nh; i++) {
const struct nh_notifier_single_info *nh;
int err;
nh = &nh_grp->nh_entries[i].nh;
err = mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, nh,
extack);
if (err)
return err;
if (!nh->gw_family && !nh->is_reject &&
!mlxsw_sp_netdev_ipip_type(mlxsw_sp, nh->dev, NULL)) {
NL_SET_ERR_MSG_MOD(extack, "Nexthop group entry does not have a gateway");
return -EINVAL;
}
}
return 0;
}
static int mlxsw_sp_nexthop_obj_validate(struct mlxsw_sp *mlxsw_sp,
unsigned long event,
struct nh_notifier_info *info)
{
if (event != NEXTHOP_EVENT_REPLACE)
return 0;
if (!info->is_grp)
return mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, info->nh,
info->extack);
return mlxsw_sp_nexthop_obj_group_validate(mlxsw_sp, info->nh_grp,
info->extack);
}
static bool mlxsw_sp_nexthop_obj_is_gateway(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_info *info)
{
const struct net_device *dev;
if (info->is_grp)
return true;
dev = info->nh->dev;
return info->nh->gw_family || info->nh->is_reject ||
mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL);
}
static void mlxsw_sp_nexthop_obj_blackhole_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
u16 lb_rif_index = mlxsw_sp->router->lb_rif_index;
nh->discard = 1;
nh->should_offload = 1;
nh->rif = mlxsw_sp->router->rifs[lb_rif_index];
}
static void mlxsw_sp_nexthop_obj_blackhole_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
nh->rif = NULL;
nh->should_offload = 0;
}
static int
mlxsw_sp_nexthop_obj_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
struct nh_notifier_single_info *nh_obj, int weight)
{
struct net_device *dev = nh_obj->dev;
int err;
nh->nhgi = nh_grp->nhgi;
nh->nh_weight = weight;
switch (nh_obj->gw_family) {
case AF_INET:
memcpy(&nh->gw_addr, &nh_obj->ipv4, sizeof(nh_obj->ipv4));
nh->neigh_tbl = &arp_tbl;
break;
case AF_INET6:
memcpy(&nh->gw_addr, &nh_obj->ipv6, sizeof(nh_obj->ipv6));
#if IS_ENABLED(CONFIG_IPV6)
nh->neigh_tbl = &nd_tbl;
#endif
break;
}
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
nh->ifindex = dev->ifindex;
err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
if (err)
goto err_type_init;
if (nh_obj->is_reject)
mlxsw_sp_nexthop_obj_blackhole_init(mlxsw_sp, nh);
return 0;
err_type_init:
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop_obj_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
if (nh->discard)
mlxsw_sp_nexthop_obj_blackhole_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
}
static int
mlxsw_sp_nexthop_obj_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct nh_notifier_info *info)
{
unsigned int nhs = info->is_grp ? info->nh_grp->num_nh : 1;
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_nexthop *nh;
int err, i;
nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
nhgi->gateway = mlxsw_sp_nexthop_obj_is_gateway(mlxsw_sp, info);
nhgi->count = nhs;
for (i = 0; i < nhgi->count; i++) {
struct nh_notifier_single_info *nh_obj;
int weight;
nh = &nhgi->nexthops[i];
if (info->is_grp) {
nh_obj = &info->nh_grp->nh_entries[i].nh;
weight = info->nh_grp->nh_entries[i].weight;
} else {
nh_obj = info->nh;
weight = 1;
}
err = mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj,
weight);
if (err)
goto err_nexthop_obj_init;
}
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "Failed to write adjacency entries to the device");
goto err_group_refresh;
}
return 0;
err_group_refresh:
i = nhgi->count;
err_nexthop_obj_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop_obj_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
int i;
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_obj_group_create(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ;
nh_grp->obj.id = info->id;
err = mlxsw_sp_nexthop_obj_group_info_init(mlxsw_sp, nh_grp, info);
if (err)
goto err_nexthop_group_info_init;
nh_grp->can_destroy = false;
return nh_grp;
err_nexthop_group_info_init:
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop_obj_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_obj_group_info_fini(mlxsw_sp, nh_grp);
WARN_ON_ONCE(!list_empty(&nh_grp->fib_list));
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_obj_group_lookup(struct mlxsw_sp *mlxsw_sp, u32 id)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ;
cmp_arg.id = id;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static int mlxsw_sp_nexthop_obj_group_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
return mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
}
static int
mlxsw_sp_nexthop_obj_group_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop_group *old_nh_grp,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_nexthop_group_info *old_nhgi = old_nh_grp->nhgi;
struct mlxsw_sp_nexthop_group_info *new_nhgi = nh_grp->nhgi;
int err;
old_nh_grp->nhgi = new_nhgi;
new_nhgi->nh_grp = old_nh_grp;
nh_grp->nhgi = old_nhgi;
old_nhgi->nh_grp = nh_grp;
if (old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) {
err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, old_nh_grp,
old_nhgi->adj_index,
old_nhgi->ecmp_size);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to replace old adjacency index with new one");
goto err_out;
}
} else if (old_nhgi->adj_index_valid && !new_nhgi->adj_index_valid) {
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to trap packets");
goto err_out;
}
} else if (!old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) {
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to forward packets");
goto err_out;
}
}
mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, old_nh_grp);
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return 0;
err_out:
old_nhgi->nh_grp = old_nh_grp;
nh_grp->nhgi = new_nhgi;
new_nhgi->nh_grp = nh_grp;
old_nh_grp->nhgi = old_nhgi;
return err;
}
static int mlxsw_sp_nexthop_obj_new(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp, *old_nh_grp;
struct netlink_ext_ack *extack = info->extack;
int err;
nh_grp = mlxsw_sp_nexthop_obj_group_create(mlxsw_sp, info);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
old_nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id);
if (!old_nh_grp)
err = mlxsw_sp_nexthop_obj_group_add(mlxsw_sp, nh_grp);
else
err = mlxsw_sp_nexthop_obj_group_replace(mlxsw_sp, nh_grp,
old_nh_grp, extack);
if (err) {
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
}
return err;
}
static void mlxsw_sp_nexthop_obj_del(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp;
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id);
if (!nh_grp)
return;
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
if (!list_empty(&nh_grp->fib_list))
return;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
}
static int mlxsw_sp_nexthop_obj_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct nh_notifier_info *info = ptr;
struct mlxsw_sp_router *router;
int err = 0;
router = container_of(nb, struct mlxsw_sp_router, nexthop_nb);
err = mlxsw_sp_nexthop_obj_validate(router->mlxsw_sp, event, info);
if (err)
goto out;
mutex_lock(&router->lock);
ASSERT_RTNL();
switch (event) {
case NEXTHOP_EVENT_REPLACE:
err = mlxsw_sp_nexthop_obj_new(router->mlxsw_sp, info);
break;
case NEXTHOP_EVENT_DEL:
mlxsw_sp_nexthop_obj_del(router->mlxsw_sp, info);
break;
default:
break;
}
mutex_unlock(&router->lock);
out:
return notifier_from_errno(err);
}
static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp,
struct fib_info *fi)
{
const struct fib_nh *nh = fib_info_nh(fi, 0);
return nh->fib_nh_scope == RT_SCOPE_LINK ||
mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL);
}
static int
mlxsw_sp_nexthop4_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
unsigned int nhs = fib_info_num_path(nh_grp->ipv4.fi);
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_nexthop *nh;
int err, i;
nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
nhgi->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, nh_grp->ipv4.fi);
nhgi->count = nhs;
for (i = 0; i < nhgi->count; i++) {
struct fib_nh *fib_nh;
nh = &nhgi->nexthops[i];
fib_nh = fib_info_nh(nh_grp->ipv4.fi, i);
err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh);
if (err)
goto err_nexthop4_init;
}
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err)
goto err_group_refresh;
return 0;
err_group_refresh:
i = nhgi->count;
err_nexthop4_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop4_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop4_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
int i;
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop4_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4;
nh_grp->ipv4.fi = fi;
fib_info_hold(fi);
err = mlxsw_sp_nexthop4_group_info_init(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_info_init;
err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_insert;
nh_grp->can_destroy = true;
return nh_grp;
err_nexthop_group_insert:
mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp);
err_nexthop_group_info_init:
fib_info_put(fi);
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp);
fib_info_put(nh_grp->ipv4.fi);
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group *nh_grp;
if (fi->nh) {
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp,
fi->nh->id);
if (WARN_ON_ONCE(!nh_grp))
return -EINVAL;
goto out;
}
nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi);
if (!nh_grp) {
nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
}
out:
list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list);
fib_entry->nh_group = nh_grp;
return 0;
}
static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group;
list_del(&fib_entry->nexthop_group_node);
if (!list_empty(&nh_grp->fib_list))
return;
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) {
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return;
}
mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp);
}
static bool
mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
return !fib4_entry->tos;
}
static bool
mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group;
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
if (!mlxsw_sp_fib4_entry_should_offload(fib_entry))
return false;
break;
case MLXSW_SP_L3_PROTO_IPV6:
break;
}
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return !!nh_group->nhgi->adj_index_valid;
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return !!nh_group->nhgi->nh_rif;
case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE:
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP:
return true;
default:
return false;
}
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_rt6 *mlxsw_sp_rt6)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i];
struct fib6_info *rt = mlxsw_sp_rt6->rt;
if (nh->rif && nh->rif->dev == rt->fib6_nh->fib_nh_dev &&
ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr,
&rt->fib6_nh->fib_nh_gw6))
return nh;
continue;
}
return NULL;
}
static void
mlxsw_sp_fib4_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr;
int dst_len = fib_entry->fib_node->key.prefix_len;
struct mlxsw_sp_fib4_entry *fib4_entry;
struct fib_rt_info fri;
bool should_offload;
should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry);
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
fri.fi = fib4_entry->fi;
fri.tb_id = fib4_entry->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = dst_len;
fri.tos = fib4_entry->tos;
fri.type = fib4_entry->type;
fri.offload = should_offload;
fri.trap = !should_offload;
fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
}
static void
mlxsw_sp_fib4_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr;
int dst_len = fib_entry->fib_node->key.prefix_len;
struct mlxsw_sp_fib4_entry *fib4_entry;
struct fib_rt_info fri;
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
fri.fi = fib4_entry->fi;
fri.tb_id = fib4_entry->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = dst_len;
fri.tos = fib4_entry->tos;
fri.type = fib4_entry->type;
fri.offload = false;
fri.trap = false;
fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
}
static void
mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
bool should_offload;
should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry);
fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry,
common);
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list)
fib6_info_hw_flags_set(mlxsw_sp_rt6->rt, should_offload,
!should_offload);
}
static void
mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry,
common);
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list)
fib6_info_hw_flags_set(mlxsw_sp_rt6->rt, false, false);
}
static void
mlxsw_sp_fib_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_sp_fib6_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
}
}
static void
mlxsw_sp_fib_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_sp_fib6_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
}
}
static void
mlxsw_sp_fib_entry_hw_flags_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
switch (op) {
case MLXSW_SP_FIB_ENTRY_OP_WRITE:
case MLXSW_SP_FIB_ENTRY_OP_UPDATE:
mlxsw_sp_fib_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
case MLXSW_SP_FIB_ENTRY_OP_DELETE:
mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
default:
break;
}
}
struct mlxsw_sp_fib_entry_op_ctx_basic {
char ralue_pl[MLXSW_REG_RALUE_LEN];
};
static void
mlxsw_sp_router_ll_basic_fib_entry_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
enum mlxsw_sp_l3proto proto,
enum mlxsw_sp_fib_entry_op op,
u16 virtual_router, u8 prefix_len,
unsigned char *addr,
struct mlxsw_sp_fib_entry_priv *priv)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
enum mlxsw_reg_ralxx_protocol ralxx_proto;
char *ralue_pl = op_ctx_basic->ralue_pl;
enum mlxsw_reg_ralue_op ralue_op;
ralxx_proto = (enum mlxsw_reg_ralxx_protocol) proto;
switch (op) {
case MLXSW_SP_FIB_ENTRY_OP_WRITE:
case MLXSW_SP_FIB_ENTRY_OP_UPDATE:
ralue_op = MLXSW_REG_RALUE_OP_WRITE_WRITE;
break;
case MLXSW_SP_FIB_ENTRY_OP_DELETE:
ralue_op = MLXSW_REG_RALUE_OP_WRITE_DELETE;
break;
default:
WARN_ON_ONCE(1);
return;
}
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_reg_ralue_pack4(ralue_pl, ralxx_proto, ralue_op,
virtual_router, prefix_len, (u32 *) addr);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_reg_ralue_pack6(ralue_pl, ralxx_proto, ralue_op,
virtual_router, prefix_len, addr);
break;
}
}
static void
mlxsw_sp_router_ll_basic_fib_entry_act_remote_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
enum mlxsw_reg_ralue_trap_action trap_action,
u16 trap_id, u32 adjacency_index, u16 ecmp_size)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
mlxsw_reg_ralue_act_remote_pack(op_ctx_basic->ralue_pl, trap_action,
trap_id, adjacency_index, ecmp_size);
}
static void
mlxsw_sp_router_ll_basic_fib_entry_act_local_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
enum mlxsw_reg_ralue_trap_action trap_action,
u16 trap_id, u16 local_erif)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
mlxsw_reg_ralue_act_local_pack(op_ctx_basic->ralue_pl, trap_action,
trap_id, local_erif);
}
static void
mlxsw_sp_router_ll_basic_fib_entry_act_ip2me_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
mlxsw_reg_ralue_act_ip2me_pack(op_ctx_basic->ralue_pl);
}
static void
mlxsw_sp_router_ll_basic_fib_entry_act_ip2me_tun_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
u32 tunnel_ptr)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
mlxsw_reg_ralue_act_ip2me_tun_pack(op_ctx_basic->ralue_pl, tunnel_ptr);
}
static int
mlxsw_sp_router_ll_basic_fib_entry_commit(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
bool *postponed_for_bulk)
{
struct mlxsw_sp_fib_entry_op_ctx_basic *op_ctx_basic = (void *) op_ctx->ll_priv;
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue),
op_ctx_basic->ralue_pl);
}
static bool
mlxsw_sp_router_ll_basic_fib_entry_is_committed(struct mlxsw_sp_fib_entry_priv *priv)
{
return true;
}
static void mlxsw_sp_fib_entry_pack(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib;
mlxsw_sp_fib_entry_op_ctx_priv_hold(op_ctx, fib_entry->priv);
fib->ll_ops->fib_entry_pack(op_ctx, fib->proto, op, fib->vr->id,
fib_entry->fib_node->key.prefix_len,
fib_entry->fib_node->key.addr,
fib_entry->priv);
}
static int mlxsw_sp_fib_entry_commit(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
const struct mlxsw_sp_router_ll_ops *ll_ops)
{
bool postponed_for_bulk = false;
int err;
err = ll_ops->fib_entry_commit(mlxsw_sp, op_ctx, &postponed_for_bulk);
if (!postponed_for_bulk)
mlxsw_sp_fib_entry_op_ctx_priv_put_all(op_ctx);
return err;
}
static int mlxsw_sp_adj_discard_write(struct mlxsw_sp *mlxsw_sp)
{
enum mlxsw_reg_ratr_trap_action trap_action;
char ratr_pl[MLXSW_REG_RATR_LEN];
int err;
if (mlxsw_sp->router->adj_discard_index_valid)
return 0;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
&mlxsw_sp->router->adj_discard_index);
if (err)
return err;
trap_action = MLXSW_REG_RATR_TRAP_ACTION_TRAP;
mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true,
MLXSW_REG_RATR_TYPE_ETHERNET,
mlxsw_sp->router->adj_discard_index,
mlxsw_sp->router->lb_rif_index);
mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action);
mlxsw_reg_ratr_trap_id_set(ratr_pl, MLXSW_TRAP_ID_RTR_EGRESS0);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
if (err)
goto err_ratr_write;
mlxsw_sp->router->adj_discard_index_valid = true;
return 0;
err_ratr_write:
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
mlxsw_sp->router->adj_discard_index);
return err;
}
static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group;
struct mlxsw_sp_nexthop_group_info *nhgi = nh_group->nhgi;
enum mlxsw_reg_ralue_trap_action trap_action;
u16 trap_id = 0;
u32 adjacency_index = 0;
u16 ecmp_size = 0;
int err;
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
adjacency_index = nhgi->adj_index;
ecmp_size = nhgi->ecmp_size;
} else if (!nhgi->adj_index_valid && nhgi->count && nhgi->nh_rif) {
err = mlxsw_sp_adj_discard_write(mlxsw_sp);
if (err)
return err;
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
adjacency_index = mlxsw_sp->router->adj_discard_index;
ecmp_size = 1;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_remote_pack(op_ctx, trap_action, trap_id,
adjacency_index, ecmp_size);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
struct mlxsw_sp_rif *rif = fib_entry->nh_group->nhgi->nh_rif;
enum mlxsw_reg_ralue_trap_action trap_action;
u16 trap_id = 0;
u16 rif_index = 0;
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
rif_index = rif->rif_index;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_local_pack(op_ctx, trap_action, trap_id, rif_index);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_ip2me_pack(op_ctx);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
enum mlxsw_reg_ralue_trap_action trap_action;
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR;
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_local_pack(op_ctx, trap_action, 0, 0);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int
mlxsw_sp_fib_entry_op_unreachable(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
enum mlxsw_reg_ralue_trap_action trap_action;
u16 trap_id;
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS1;
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_local_pack(op_ctx, trap_action, trap_id, 0);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int
mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry;
const struct mlxsw_sp_ipip_ops *ipip_ops;
int err;
if (WARN_ON(!ipip_entry))
return -EINVAL;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
err = ipip_ops->decap_config(mlxsw_sp, ipip_entry,
fib_entry->decap.tunnel_index);
if (err)
return err;
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_ip2me_tun_pack(op_ctx,
fib_entry->decap.tunnel_index);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
mlxsw_sp_fib_entry_pack(op_ctx, fib_entry, op);
ll_ops->fib_entry_act_ip2me_tun_pack(op_ctx,
fib_entry->decap.tunnel_index);
return mlxsw_sp_fib_entry_commit(mlxsw_sp, op_ctx, ll_ops);
}
static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return mlxsw_sp_fib_entry_op_local(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_TRAP:
return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE:
return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE:
return mlxsw_sp_fib_entry_op_unreachable(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, op_ctx, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP:
return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, op_ctx, fib_entry, op);
}
return -EINVAL;
}
static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_sp_fib_entry_op op)
{
int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, op_ctx, fib_entry, op);
if (err)
return err;
mlxsw_sp_fib_entry_hw_flags_refresh(mlxsw_sp, fib_entry, op);
return err;
}
static int __mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry,
bool is_new)
{
return mlxsw_sp_fib_entry_op(mlxsw_sp, op_ctx, fib_entry,
is_new ? MLXSW_SP_FIB_ENTRY_OP_WRITE :
MLXSW_SP_FIB_ENTRY_OP_UPDATE);
}
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_entry_op_ctx *op_ctx = mlxsw_sp->router->ll_op_ctx;
mlxsw_sp_fib_entry_op_ctx_clear(op_ctx);
return __mlxsw_sp_fib_entry_update(mlxsw_sp, op_ctx, fib_entry, false);
}
static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry)
{
const struct mlxsw_sp_router_ll_ops *ll_ops = fib_entry->fib_node->fib->ll_ops;
if (!ll_ops->fib_entry_is_committed(fib_entry->priv))
return 0;
return mlxsw_sp_fib_entry_op(mlxsw_sp, op_ctx, fib_entry,
MLXSW_SP_FIB_ENTRY_OP_DELETE);
}
static int
mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group_info *nhgi = fib_entry->nh_group->nhgi;
union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) };
struct mlxsw_sp_router *router = mlxsw_sp->router;
u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id);
int ifindex = nhgi->nexthops[0].ifindex;
struct mlxsw_sp_ipip_entry *ipip_entry;
switch (fen_info->type) {
case RTN_LOCAL:
ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, ifindex,
MLXSW_SP_L3_PROTO_IPV4, dip);
if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) {
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
return mlxsw_sp_fib_entry_decap_init(mlxsw_sp,
fib_entry,
ipip_entry);
}
if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id,
MLXSW_SP_L3_PROTO_IPV4,
&dip)) {
u32 tunnel_index;
tunnel_index = router->nve_decap_config.tunnel_index;
fib_entry->decap.tunnel_index = tunnel_index;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
return 0;
}
fallthrough;
case RTN_BROADCAST:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
return 0;
case RTN_BLACKHOLE:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE;
return 0;
case RTN_UNREACHABLE:
case RTN_PROHIBIT:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE;
return 0;
case RTN_UNICAST:
if (nhgi->gateway)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE;
else
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
return 0;
default:
return -EINVAL;
}
}
static void
mlxsw_sp_fib4_entry_type_unset(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry);
break;
default:
break;
}
}
static struct mlxsw_sp_fib4_entry *
mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_entry *fib_entry;
int err;
fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL);
if (!fib4_entry)
return ERR_PTR(-ENOMEM);
fib_entry = &fib4_entry->common;
fib_entry->priv = mlxsw_sp_fib_entry_priv_create(fib_node->fib->ll_ops);
if (IS_ERR(fib_entry->priv)) {
err = PTR_ERR(fib_entry->priv);
goto err_fib_entry_priv_create;
}
err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi);
if (err)
goto err_nexthop4_group_get;
err = mlxsw_sp_nexthop_group_vr_link(fib_entry->nh_group,
fib_node->fib);
if (err)
goto err_nexthop_group_vr_link;
err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry);
if (err)
goto err_fib4_entry_type_set;
fib4_entry->fi = fen_info->fi;
fib_info_hold(fib4_entry->fi);
fib4_entry->tb_id = fen_info->tb_id;
fib4_entry->type = fen_info->type;
fib4_entry->tos = fen_info->tos;
fib_entry->fib_node = fib_node;
return fib4_entry;
err_fib4_entry_type_set:
mlxsw_sp_nexthop_group_vr_unlink(fib_entry->nh_group, fib_node->fib);
err_nexthop_group_vr_link:
mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common);
err_nexthop4_group_get:
mlxsw_sp_fib_entry_priv_put(fib_entry->priv);
err_fib_entry_priv_create:
kfree(fib4_entry);
return ERR_PTR(err);
}
static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib4_entry *fib4_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node;
fib_info_put(fib4_entry->fi);
mlxsw_sp_fib4_entry_type_unset(mlxsw_sp, &fib4_entry->common);
mlxsw_sp_nexthop_group_vr_unlink(fib4_entry->common.nh_group,
fib_node->fib);
mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common);
mlxsw_sp_fib_entry_priv_put(fib4_entry->common.priv);
kfree(fib4_entry);
}
static struct mlxsw_sp_fib4_entry *
mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id);
if (!vr)
return NULL;
fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4);
fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst,
sizeof(fen_info->dst),
fen_info->dst_len);
if (!fib_node)
return NULL;
fib4_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib4_entry, common);
if (fib4_entry->tb_id == fen_info->tb_id &&
fib4_entry->tos == fen_info->tos &&
fib4_entry->type == fen_info->type &&
fib4_entry->fi == fen_info->fi)
return fib4_entry;
return NULL;
}
static const struct rhashtable_params mlxsw_sp_fib_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_fib_node, key),
.head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node),
.key_len = sizeof(struct mlxsw_sp_fib_key),
.automatic_shrinking = true,
};
static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
rhashtable_remove_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
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)
{
struct mlxsw_sp_fib_key key;
memset(&key, 0, sizeof(key));
memcpy(key.addr, addr, addr_len);
key.prefix_len = prefix_len;
return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len)
{
struct mlxsw_sp_fib_node *fib_node;
fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL);
if (!fib_node)
return NULL;
list_add(&fib_node->list, &fib->node_list);
memcpy(fib_node->key.addr, addr, addr_len);
fib_node->key.prefix_len = prefix_len;
return fib_node;
}
static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node)
{
list_del(&fib_node->list);
kfree(fib_node);
}
static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_prefix_usage req_prefix_usage;
struct mlxsw_sp_fib *fib = fib_node->fib;
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[fib->proto];
if (lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0)
goto out;
mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage);
mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len);
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
fib->proto);
if (IS_ERR(lpm_tree))
return PTR_ERR(lpm_tree);
err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree);
if (err)
goto err_lpm_tree_replace;
out:
lpm_tree->prefix_ref_count[fib_node->key.prefix_len]++;
return 0;
err_lpm_tree_replace:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
return err;
}
static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree;
struct mlxsw_sp_prefix_usage req_prefix_usage;
struct mlxsw_sp_fib *fib = fib_node->fib;
int err;
if (--lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0)
return;
mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage);
mlxsw_sp_prefix_usage_clear(&req_prefix_usage,
fib_node->key.prefix_len);
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
fib->proto);
if (IS_ERR(lpm_tree))
return;
err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree);
if (err)
goto err_lpm_tree_replace;
return;
err_lpm_tree_replace:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
}
static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib *fib)
{
int err;
err = mlxsw_sp_fib_node_insert(fib, fib_node);
if (err)
return err;
fib_node->fib = fib;
err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib_node);
if (err)
goto err_fib_lpm_tree_link;
return 0;
err_fib_lpm_tree_link:
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
return err;
}
static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_fib *fib = fib_node->fib;
mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib_node);
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr,
size_t addr_len, unsigned char prefix_len,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL);
if (IS_ERR(vr))
return ERR_CAST(vr);
fib = mlxsw_sp_vr_fib(vr, proto);
fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len);
if (fib_node)
return fib_node;
fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len);
if (!fib_node) {
err = -ENOMEM;
goto err_fib_node_create;
}
err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib);
if (err)
goto err_fib_node_init;
return fib_node;
err_fib_node_init:
mlxsw_sp_fib_node_destroy(fib_node);
err_fib_node_create:
mlxsw_sp_vr_put(mlxsw_sp, vr);
return ERR_PTR(err);
}
static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_vr *vr = fib_node->fib->vr;
if (fib_node->fib_entry)
return;
mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node);
mlxsw_sp_fib_node_destroy(fib_node);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
static int mlxsw_sp_fib_node_entry_link(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
bool is_new = !fib_node->fib_entry;
int err;
fib_node->fib_entry = fib_entry;
err = __mlxsw_sp_fib_entry_update(mlxsw_sp, op_ctx, fib_entry, is_new);
if (err)
goto err_fib_entry_update;
return 0;
err_fib_entry_update:
fib_node->fib_entry = NULL;
return err;
}
static int __mlxsw_sp_fib_node_entry_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
int err;
err = mlxsw_sp_fib_entry_del(mlxsw_sp, op_ctx, fib_entry);
fib_node->fib_entry = NULL;
return err;
}
static void mlxsw_sp_fib_node_entry_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_entry_op_ctx *op_ctx = mlxsw_sp->router->ll_op_ctx;
mlxsw_sp_fib_entry_op_ctx_clear(op_ctx);
__mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, op_ctx, fib_entry);
}
static bool mlxsw_sp_fib4_allow_replace(struct mlxsw_sp_fib4_entry *fib4_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node;
struct mlxsw_sp_fib4_entry *fib4_replaced;
if (!fib_node->fib_entry)
return true;
fib4_replaced = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib4_entry, common);
if (fib4_entry->tb_id == RT_TABLE_MAIN &&
fib4_replaced->tb_id == RT_TABLE_LOCAL)
return false;
return true;
}
static int
mlxsw_sp_router_fib4_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry, *fib4_replaced;
struct mlxsw_sp_fib_entry *replaced;
struct mlxsw_sp_fib_node *fib_node;
int err;
if (mlxsw_sp->router->aborted)
return 0;
fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id,
&fen_info->dst, sizeof(fen_info->dst),
fen_info->dst_len,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(fib_node)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n");
return PTR_ERR(fib_node);
}
fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info);
if (IS_ERR(fib4_entry)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n");
err = PTR_ERR(fib4_entry);
goto err_fib4_entry_create;
}
if (!mlxsw_sp_fib4_allow_replace(fib4_entry)) {
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return 0;
}
replaced = fib_node->fib_entry;
err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, op_ctx, &fib4_entry->common);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n");
goto err_fib_node_entry_link;
}
if (!replaced)
return 0;
mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced);
fib4_replaced = container_of(replaced, struct mlxsw_sp_fib4_entry,
common);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_replaced);
return 0;
err_fib_node_entry_link:
fib_node->fib_entry = replaced;
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
err_fib4_entry_create:
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err;
}
static int mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_node *fib_node;
int err;
if (mlxsw_sp->router->aborted)
return 0;
fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info);
if (!fib4_entry)
return 0;
fib_node = fib4_entry->common.fib_node;
err = __mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, op_ctx, &fib4_entry->common);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err;
}
static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt)
{
if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST)
return true;
if (rt->fib6_flags & RTF_CACHE)
return true;
return false;
}
static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL);
if (!mlxsw_sp_rt6)
return ERR_PTR(-ENOMEM);
mlxsw_sp_rt6->rt = rt;
fib6_info_hold(rt);
return mlxsw_sp_rt6;
}
#if IS_ENABLED(CONFIG_IPV6)
static void mlxsw_sp_rt6_release(struct fib6_info *rt)
{
fib6_info_release(rt);
}
#else
static void mlxsw_sp_rt6_release(struct fib6_info *rt)
{
}
#endif
static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6)
{
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
if (!mlxsw_sp_rt6->rt->nh)
fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt);
kfree(mlxsw_sp_rt6);
}
static struct fib6_info *
mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry)
{
return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6,
list)->rt;
}
static struct mlxsw_sp_rt6 *
mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry,
const struct fib6_info *rt)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
if (mlxsw_sp_rt6->rt == rt)
return mlxsw_sp_rt6;
}
return NULL;
}
static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt,
enum mlxsw_sp_ipip_type *ret)
{
return rt->fib6_nh->fib_nh_dev &&
mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret);
}
static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
const struct fib6_info *rt)
{
struct net_device *dev = rt->fib6_nh->fib_nh_dev;
nh->nhgi = nh_grp->nhgi;
nh->nh_weight = rt->fib6_nh->fib_nh_weight;
memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr));
#if IS_ENABLED(CONFIG_IPV6)
nh->neigh_tbl = &nd_tbl;
#endif
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
if (!dev)
return 0;
nh->ifindex = dev->ifindex;
return mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
}
static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
}
static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt)
{
return rt->fib6_nh->fib_nh_gw_family ||
mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL);
}
static int
mlxsw_sp_nexthop6_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
struct mlxsw_sp_nexthop *nh;
int err, i;
nhgi = kzalloc(struct_size(nhgi, nexthops, fib6_entry->nrt6),
GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list,
struct mlxsw_sp_rt6, list);
nhgi->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt);
nhgi->count = fib6_entry->nrt6;
for (i = 0; i < nhgi->count; i++) {
struct fib6_info *rt = mlxsw_sp_rt6->rt;
nh = &nhgi->nexthops[i];
err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt);
if (err)
goto err_nexthop6_init;
mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list);
}
nh_grp->nhgi = nhgi;
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err)
goto err_group_refresh;
return 0;
err_group_refresh:
i = nhgi->count;
err_nexthop6_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop6_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop6_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
int i;
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop6_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6;
err = mlxsw_sp_nexthop6_group_info_init(mlxsw_sp, nh_grp, fib6_entry);
if (err)
goto err_nexthop_group_info_init;
err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_insert;
nh_grp->can_destroy = true;
return nh_grp;
err_nexthop_group_insert:
mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp);
err_nexthop_group_info_init:
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp);
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry);
struct mlxsw_sp_nexthop_group *nh_grp;
if (rt->nh) {
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp,
rt->nh->id);
if (WARN_ON_ONCE(!nh_grp))
return -EINVAL;
goto out;
}
nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry);
if (!nh_grp) {
nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
}
__mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry);
out:
list_add_tail(&fib6_entry->common.nexthop_group_node,
&nh_grp->fib_list);
fib6_entry->common.nh_group = nh_grp;
return 0;
}
static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group;
list_del(&fib_entry->nexthop_group_node);
if (!list_empty(&nh_grp->fib_list))
return;
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) {
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return;
}
mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp);
}
static int mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group;
struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node;
int err;
mlxsw_sp_nexthop_group_vr_unlink(old_nh_grp, fib_node->fib);
fib6_entry->common.nh_group = NULL;
list_del(&fib6_entry->common.nexthop_group_node);
err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry);
if (err)
goto err_nexthop6_group_get;
err = mlxsw_sp_nexthop_group_vr_link(fib6_entry->common.nh_group,
fib_node->fib);
if (err)
goto err_nexthop_group_vr_link;
err = __mlxsw_sp_fib_entry_update(mlxsw_sp, op_ctx,
&fib6_entry->common, false);
if (err)
goto err_fib_entry_update;
if (list_empty(&old_nh_grp->fib_list))
mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp);
return 0;
err_fib_entry_update:
mlxsw_sp_nexthop_group_vr_unlink(fib6_entry->common.nh_group,
fib_node->fib);
err_nexthop_group_vr_link:
mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common);
err_nexthop6_group_get:
list_add_tail(&fib6_entry->common.nexthop_group_node,
&old_nh_grp->fib_list);
fib6_entry->common.nh_group = old_nh_grp;
mlxsw_sp_nexthop_group_vr_link(old_nh_grp, fib_node->fib);
return err;
}
static int
mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib6_entry *fib6_entry,
struct fib6_info **rt_arr, unsigned int nrt6)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
int err, i;
for (i = 0; i < nrt6; i++) {
mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]);
if (IS_ERR(mlxsw_sp_rt6)) {
err = PTR_ERR(mlxsw_sp_rt6);
goto err_rt6_create;
}
list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list);
fib6_entry->nrt6++;
}
err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, op_ctx, fib6_entry);
if (err)
goto err_nexthop6_group_update;
return 0;
err_nexthop6_group_update:
i = nrt6;
err_rt6_create:
for (i--; i >= 0; i--) {
fib6_entry->nrt6--;
mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list,
struct mlxsw_sp_rt6, list);
list_del(&mlxsw_sp_rt6->list);
mlxsw_sp_rt6_destroy(mlxsw_sp_rt6);
}
return err;
}
static void
mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
struct mlxsw_sp_fib6_entry *fib6_entry,
struct fib6_info **rt_arr, unsigned int nrt6)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;