| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ido Schimmel | 17623 | 48.41% | 135 | 48.39% |
| Petr Machata | 8867 | 24.36% | 52 | 18.64% |
| Jiri Pirko | 3275 | 9.00% | 20 | 7.17% |
| Arkadi Sharshevsky | 2678 | 7.36% | 22 | 7.89% |
| Yotam Gigi | 1463 | 4.02% | 10 | 3.58% |
| David Ahern | 1043 | 2.86% | 20 | 7.17% |
| Nir Dotan | 895 | 2.46% | 9 | 3.23% |
| Yuval Mintz | 458 | 1.26% | 5 | 1.79% |
| Nogah Frankel | 76 | 0.21% | 2 | 0.72% |
| Gustavo A. R. Silva | 14 | 0.04% | 1 | 0.36% |
| David S. Miller | 7 | 0.02% | 1 | 0.36% |
| Arnd Bergmann | 6 | 0.02% | 1 | 0.36% |
| Vincent Stehlé | 2 | 0.01% | 1 | 0.36% |
| Total | 36407 | 279 |
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/rhashtable.h> #include <linux/bitops.h> #include <linux/in6.h> #include <linux/notifier.h> #include <linux/inetdevice.h> #include <linux/netdevice.h> #include <linux/if_bridge.h> #include <linux/socket.h> #include <linux/route.h> #include <linux/gcd.h> #include <linux/if_macvlan.h> #include <linux/refcount.h> #include <linux/jhash.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_router { struct mlxsw_sp *mlxsw_sp; struct mlxsw_sp_rif **rifs; struct mlxsw_sp_vr *vrs; struct rhashtable neigh_ht; struct rhashtable nexthop_group_ht; struct rhashtable nexthop_ht; struct list_head nexthop_list; struct { /* One tree for each protocol: IPv4 and IPv6 */ struct mlxsw_sp_lpm_tree *proto_trees[2]; struct mlxsw_sp_lpm_tree *trees; unsigned int tree_count; } lpm; struct { struct delayed_work dw; unsigned long interval; /* ms */ } neighs_update; struct delayed_work nexthop_probe_dw; #define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */ struct list_head nexthop_neighs_list; struct list_head ipip_list; bool aborted; struct notifier_block fib_nb; struct notifier_block netevent_nb; struct notifier_block inetaddr_nb; struct notifier_block inet6addr_nb; const struct mlxsw_sp_rif_ops **rif_ops_arr; const struct mlxsw_sp_ipip_ops **ipip_ops_arr; }; struct mlxsw_sp_rif { struct list_head nexthop_list; struct list_head neigh_list; struct net_device *dev; /* NULL for underlay RIF */ struct mlxsw_sp_fid *fid; unsigned char addr[ETH_ALEN]; int mtu; u16 rif_index; u16 vr_id; const struct mlxsw_sp_rif_ops *ops; struct mlxsw_sp *mlxsw_sp; unsigned int counter_ingress; bool counter_ingress_valid; unsigned int counter_egress; bool counter_egress_valid; }; struct mlxsw_sp_rif_params { struct net_device *dev; union { u16 system_port; u16 lag_id; }; u16 vid; bool lag; }; struct mlxsw_sp_rif_subport { struct mlxsw_sp_rif common; refcount_t ref_count; union { u16 system_port; u16 lag_id; }; u16 vid; bool lag; }; struct mlxsw_sp_rif_ipip_lb { struct mlxsw_sp_rif common; struct mlxsw_sp_rif_ipip_lb_config lb_config; u16 ul_vr_id; /* Reserved for Spectrum-2. */ u16 ul_rif_id; /* Reserved for Spectrum. */ }; struct mlxsw_sp_rif_params_ipip_lb { struct mlxsw_sp_rif_params common; struct mlxsw_sp_rif_ipip_lb_config lb_config; }; struct mlxsw_sp_rif_ops { enum mlxsw_sp_rif_type type; size_t rif_size; void (*setup)(struct mlxsw_sp_rif *rif, const struct mlxsw_sp_rif_params *params); int (*configure)(struct mlxsw_sp_rif *rif); void (*deconfigure)(struct mlxsw_sp_rif *rif); struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif, struct netlink_ext_ack *extack); void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac); }; static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree); static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_lpm_tree *lpm_tree); static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_fib *fib, u8 tree_id); static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_fib *fib); static unsigned int * mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir) { switch (dir) { case MLXSW_SP_RIF_COUNTER_EGRESS: return &rif->counter_egress; case MLXSW_SP_RIF_COUNTER_INGRESS: return &rif->counter_ingress; } return NULL; } static bool mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir) { switch (dir) { case MLXSW_SP_RIF_COUNTER_EGRESS: return rif->counter_egress_valid; case MLXSW_SP_RIF_COUNTER_INGRESS: return rif->counter_ingress_valid; } return false; } static void mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir, bool valid) { switch (dir) { case MLXSW_SP_RIF_COUNTER_EGRESS: rif->counter_egress_valid = valid; break; case MLXSW_SP_RIF_COUNTER_INGRESS: rif->counter_ingress_valid = valid; break; } } static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, unsigned int counter_index, bool enable, enum mlxsw_sp_rif_counter_dir dir) { char ritr_pl[MLXSW_REG_RITR_LEN]; bool is_egress = false; int err; if (dir == MLXSW_SP_RIF_COUNTER_EGRESS) is_egress = true; mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); if (err) return err; mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable, is_egress); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir, u64 *cnt) { char ricnt_pl[MLXSW_REG_RICNT_LEN]; unsigned int *p_counter_index; bool valid; int err; valid = mlxsw_sp_rif_counter_valid_get(rif, dir); if (!valid) return -EINVAL; p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); if (!p_counter_index) return -EINVAL; mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, MLXSW_REG_RICNT_OPCODE_NOP); err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); if (err) return err; *cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl); return 0; } static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp, unsigned int counter_index) { char ricnt_pl[MLXSW_REG_RICNT_LEN]; mlxsw_reg_ricnt_pack(ricnt_pl, counter_index, MLXSW_REG_RICNT_OPCODE_CLEAR); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); } int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir) { unsigned int *p_counter_index; int err; p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); if (!p_counter_index) return -EINVAL; err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, p_counter_index); if (err) return err; err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index); if (err) goto err_counter_clear; err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, *p_counter_index, true, dir); if (err) goto err_counter_edit; mlxsw_sp_rif_counter_valid_set(rif, dir, true); return 0; err_counter_edit: err_counter_clear: mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, *p_counter_index); return err; } void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif, enum mlxsw_sp_rif_counter_dir dir) { unsigned int *p_counter_index; if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) return; p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); if (WARN_ON(!p_counter_index)) return; mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, *p_counter_index, false, dir); mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, *p_counter_index); mlxsw_sp_rif_counter_valid_set(rif, dir, false); } static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct devlink *devlink; devlink = priv_to_devlink(mlxsw_sp->core); if (!devlink_dpipe_table_counter_enabled(devlink, MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) return; mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); } static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); } #define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1) struct mlxsw_sp_prefix_usage { DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT); }; #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) static bool mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, struct mlxsw_sp_prefix_usage *prefix_usage2) { return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); } static void mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, struct mlxsw_sp_prefix_usage *prefix_usage2) { memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); } static void mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, unsigned char prefix_len) { set_bit(prefix_len, prefix_usage->b); } static void mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, unsigned char prefix_len) { clear_bit(prefix_len, prefix_usage->b); } struct mlxsw_sp_fib_key { unsigned char addr[sizeof(struct in6_addr)]; unsigned char prefix_len; }; enum mlxsw_sp_fib_entry_type { MLXSW_SP_FIB_ENTRY_TYPE_REMOTE, MLXSW_SP_FIB_ENTRY_TYPE_LOCAL, MLXSW_SP_FIB_ENTRY_TYPE_TRAP, MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE, /* This is a special case of local delivery, where a packet should be * decapsulated on reception. Note that there is no corresponding ENCAP, * because that's a type of next hop, not of FIB entry. (There can be * several next hops in a REMOTE entry, and some of them may be * encapsulating entries.) */ MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP, MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP, }; struct mlxsw_sp_nexthop_group; struct mlxsw_sp_fib_node { struct list_head entry_list; struct list_head list; struct rhash_head ht_node; struct mlxsw_sp_fib *fib; struct mlxsw_sp_fib_key key; }; struct mlxsw_sp_fib_entry_decap { struct mlxsw_sp_ipip_entry *ipip_entry; u32 tunnel_index; }; struct mlxsw_sp_fib_entry { struct list_head list; struct mlxsw_sp_fib_node *fib_node; enum mlxsw_sp_fib_entry_type type; struct list_head nexthop_group_node; struct mlxsw_sp_nexthop_group *nh_group; struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */ }; struct mlxsw_sp_fib4_entry { struct mlxsw_sp_fib_entry common; u32 tb_id; u32 prio; u8 tos; u8 type; }; struct mlxsw_sp_fib6_entry { struct mlxsw_sp_fib_entry common; struct list_head rt6_list; unsigned int nrt6; }; struct mlxsw_sp_rt6 { struct list_head list; struct fib6_info *rt; }; struct mlxsw_sp_lpm_tree { u8 id; /* tree ID */ unsigned int ref_count; enum mlxsw_sp_l3proto proto; unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; struct mlxsw_sp_prefix_usage prefix_usage; }; struct mlxsw_sp_fib { struct rhashtable ht; struct list_head node_list; struct mlxsw_sp_vr *vr; struct mlxsw_sp_lpm_tree *lpm_tree; enum mlxsw_sp_l3proto proto; }; struct mlxsw_sp_vr { u16 id; /* virtual router ID */ u32 tb_id; /* kernel fib table id */ unsigned int rif_count; struct mlxsw_sp_fib *fib4; struct mlxsw_sp_fib *fib6; struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX]; struct mlxsw_sp_rif *ul_rif; refcount_t ul_rif_refcnt; }; static const struct rhashtable_params mlxsw_sp_fib_ht_params; static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, enum mlxsw_sp_l3proto proto) { struct mlxsw_sp_lpm_tree *lpm_tree; struct mlxsw_sp_fib *fib; int err; lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto]; fib = kzalloc(sizeof(*fib), GFP_KERNEL); if (!fib) return ERR_PTR(-ENOMEM); err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); if (err) goto err_rhashtable_init; INIT_LIST_HEAD(&fib->node_list); fib->proto = proto; fib->vr = vr; fib->lpm_tree = lpm_tree; mlxsw_sp_lpm_tree_hold(lpm_tree); err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id); if (err) goto err_lpm_tree_bind; return fib; err_lpm_tree_bind: mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); err_rhashtable_init: kfree(fib); return ERR_PTR(err); } static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib *fib) { mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); WARN_ON(!list_empty(&fib->node_list)); rhashtable_destroy(&fib->ht); kfree(fib); } static struct mlxsw_sp_lpm_tree * mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp) { static struct mlxsw_sp_lpm_tree *lpm_tree; int i; for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { lpm_tree = &mlxsw_sp->router->lpm.trees[i]; if (lpm_tree->ref_count == 0) return lpm_tree; } return NULL; } static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_lpm_tree *lpm_tree) { char ralta_pl[MLXSW_REG_RALTA_LEN]; mlxsw_reg_ralta_pack(ralta_pl, true, (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, lpm_tree->id); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); } static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_lpm_tree *lpm_tree) { char ralta_pl[MLXSW_REG_RALTA_LEN]; mlxsw_reg_ralta_pack(ralta_pl, false, (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, lpm_tree->id); mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); } static int mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_prefix_usage *prefix_usage, struct mlxsw_sp_lpm_tree *lpm_tree) { char ralst_pl[MLXSW_REG_RALST_LEN]; u8 root_bin = 0; u8 prefix; u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) root_bin = prefix; mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { if (prefix == 0) continue; mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, MLXSW_REG_RALST_BIN_NO_CHILD); last_prefix = prefix; } return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); } static struct mlxsw_sp_lpm_tree * mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_prefix_usage *prefix_usage, enum mlxsw_sp_l3proto proto) { struct mlxsw_sp_lpm_tree *lpm_tree; int err; lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp); if (!lpm_tree) return ERR_PTR(-EBUSY); lpm_tree->proto = proto; err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); if (err) return ERR_PTR(err); err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, lpm_tree); if (err) goto err_left_struct_set; memcpy(&lpm_tree->prefix_usage, prefix_usage, sizeof(lpm_tree->prefix_usage)); memset(&lpm_tree->prefix_ref_count, 0, sizeof(lpm_tree->prefix_ref_count)); lpm_tree->ref_count = 1; return lpm_tree; err_left_struct_set: mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); return ERR_PTR(err); } static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_lpm_tree *lpm_tree) { mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); } static struct mlxsw_sp_lpm_tree * mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_prefix_usage *prefix_usage, enum mlxsw_sp_l3proto proto) { struct mlxsw_sp_lpm_tree *lpm_tree; int i; for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { lpm_tree = &mlxsw_sp->router->lpm.trees[i]; if (lpm_tree->ref_count != 0 && lpm_tree->proto == proto && mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, prefix_usage)) { mlxsw_sp_lpm_tree_hold(lpm_tree); return lpm_tree; } } return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto); } static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree) { lpm_tree->ref_count++; } static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_lpm_tree *lpm_tree) { if (--lpm_tree->ref_count == 0) mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); } #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */ static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } }; struct mlxsw_sp_lpm_tree *lpm_tree; u64 max_trees; int err, i; if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES)) return -EIO; max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES); mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN; mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count, sizeof(struct mlxsw_sp_lpm_tree), GFP_KERNEL); if (!mlxsw_sp->router->lpm.trees) return -ENOMEM; for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { lpm_tree = &mlxsw_sp->router->lpm.trees[i]; lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; } lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, MLXSW_SP_L3_PROTO_IPV4); if (IS_ERR(lpm_tree)) { err = PTR_ERR(lpm_tree); goto err_ipv4_tree_get; } mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree; lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, MLXSW_SP_L3_PROTO_IPV6); if (IS_ERR(lpm_tree)) { err = PTR_ERR(lpm_tree); goto err_ipv6_tree_get; } mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree; return 0; err_ipv6_tree_get: lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); err_ipv4_tree_get: kfree(mlxsw_sp->router->lpm.trees); return err; } static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_lpm_tree *lpm_tree; lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6]; mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); kfree(mlxsw_sp->router->lpm.trees); } static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr) { return !!vr->fib4 || !!vr->fib6 || !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] || !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; } static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_vr *vr; int i; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { vr = &mlxsw_sp->router->vrs[i]; if (!mlxsw_sp_vr_is_used(vr)) return vr; } return NULL; } static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_fib *fib, u8 tree_id) { char raltb_pl[MLXSW_REG_RALTB_LEN]; mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, (enum mlxsw_reg_ralxx_protocol) fib->proto, tree_id); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); } static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_fib *fib) { char raltb_pl[MLXSW_REG_RALTB_LEN]; /* Bind to tree 0 which is default */ mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, (enum mlxsw_reg_ralxx_protocol) fib->proto, 0); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); } static u32 mlxsw_sp_fix_tb_id(u32 tb_id) { /* For our purpose, squash main, default and local tables into one */ if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT) tb_id = RT_TABLE_MAIN; return tb_id; } static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id) { struct mlxsw_sp_vr *vr; int i; tb_id = mlxsw_sp_fix_tb_id(tb_id); for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { vr = &mlxsw_sp->router->vrs[i]; if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id) return vr; } return NULL; } int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id, u16 *vr_id) { struct mlxsw_sp_vr *vr; vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); if (!vr) return -ESRCH; *vr_id = vr->id; return 0; } static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr, enum mlxsw_sp_l3proto proto) { switch (proto) { case MLXSW_SP_L3_PROTO_IPV4: return vr->fib4; case MLXSW_SP_L3_PROTO_IPV6: return vr->fib6; } return NULL; } static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, u32 tb_id, struct netlink_ext_ack *extack) { struct mlxsw_sp_mr_table *mr4_table, *mr6_table; struct mlxsw_sp_fib *fib4; struct mlxsw_sp_fib *fib6; struct mlxsw_sp_vr *vr; int err; vr = mlxsw_sp_vr_find_unused(mlxsw_sp); if (!vr) { NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers"); return ERR_PTR(-EBUSY); } fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); if (IS_ERR(fib4)) return ERR_CAST(fib4); fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); if (IS_ERR(fib6)) { err = PTR_ERR(fib6); goto err_fib6_create; } mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, MLXSW_SP_L3_PROTO_IPV4); if (IS_ERR(mr4_table)) { err = PTR_ERR(mr4_table); goto err_mr4_table_create; } mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, MLXSW_SP_L3_PROTO_IPV6); if (IS_ERR(mr6_table)) { err = PTR_ERR(mr6_table); goto err_mr6_table_create; } vr->fib4 = fib4; vr->fib6 = fib6; vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table; vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table; vr->tb_id = tb_id; return vr; err_mr6_table_create: mlxsw_sp_mr_table_destroy(mr4_table); err_mr4_table_create: mlxsw_sp_fib_destroy(mlxsw_sp, fib6); err_fib6_create: mlxsw_sp_fib_destroy(mlxsw_sp, fib4); return ERR_PTR(err); } static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) { mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]); vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL; mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]); vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL; mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6); vr->fib6 = NULL; mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4); vr->fib4 = NULL; } static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, struct netlink_ext_ack *extack) { struct mlxsw_sp_vr *vr; tb_id = mlxsw_sp_fix_tb_id(tb_id); vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); if (!vr) vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack); return vr; } static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) { if (!vr->rif_count && list_empty(&vr->fib4->node_list) && list_empty(&vr->fib6->node_list) && mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) && mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6])) mlxsw_sp_vr_destroy(mlxsw_sp, vr); } static bool mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr, enum mlxsw_sp_l3proto proto, u8 tree_id) { struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); if (!mlxsw_sp_vr_is_used(vr)) return false; if (fib->lpm_tree->id == tree_id) return true; return false; } static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib *fib, struct mlxsw_sp_lpm_tree *new_tree) { struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; int err; fib->lpm_tree = new_tree; mlxsw_sp_lpm_tree_hold(new_tree); err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); if (err) goto err_tree_bind; mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); return 0; err_tree_bind: mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree); fib->lpm_tree = old_tree; return err; } static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib *fib, struct mlxsw_sp_lpm_tree *new_tree) { enum mlxsw_sp_l3proto proto = fib->proto; struct mlxsw_sp_lpm_tree *old_tree; u8 old_id, new_id = new_tree->id; struct mlxsw_sp_vr *vr; int i, err; old_tree = mlxsw_sp->router->lpm.proto_trees[proto]; old_id = old_tree->id; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { vr = &mlxsw_sp->router->vrs[i]; if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id)) continue; err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, mlxsw_sp_vr_fib(vr, proto), new_tree); if (err) goto err_tree_replace; } memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count, sizeof(new_tree->prefix_ref_count)); mlxsw_sp->router->lpm.proto_trees[proto] = new_tree; mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); return 0; err_tree_replace: for (i--; i >= 0; i--) { if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id)) continue; mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, mlxsw_sp_vr_fib(vr, proto), old_tree); } return err; } static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_vr *vr; u64 max_vrs; int i; if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS)) return -EIO; max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr), GFP_KERNEL); if (!mlxsw_sp->router->vrs) return -ENOMEM; for (i = 0; i < max_vrs; i++) { vr = &mlxsw_sp->router->vrs[i]; vr->id = i; } return 0; } static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp); static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp) { /* At this stage we're guaranteed not to have new incoming * FIB notifications and the work queue is free from FIBs * sitting on top of mlxsw netdevs. However, we can still * have other FIBs queued. Flush the queue before flushing * the device's tables. No need for locks, as we're the only * writer. */ mlxsw_core_flush_owq(); mlxsw_sp_router_fib_flush(mlxsw_sp); kfree(mlxsw_sp->router->vrs); } static struct net_device * __mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev) { struct ip_tunnel *tun = netdev_priv(ol_dev); struct net *net = dev_net(ol_dev); return __dev_get_by_index(net, tun->parms.link); } u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev) { struct net_device *d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); if (d) return l3mdev_fib_table(d) ? : RT_TABLE_MAIN; else return RT_TABLE_MAIN; } static struct mlxsw_sp_rif * mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_rif_params *params, struct netlink_ext_ack *extack); static struct mlxsw_sp_rif_ipip_lb * mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp, enum mlxsw_sp_ipip_type ipipt, struct net_device *ol_dev, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif_params_ipip_lb lb_params; const struct mlxsw_sp_ipip_ops *ipip_ops; struct mlxsw_sp_rif *rif; ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; lb_params = (struct mlxsw_sp_rif_params_ipip_lb) { .common.dev = ol_dev, .common.lag = false, .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev), }; rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack); if (IS_ERR(rif)) return ERR_CAST(rif); return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); } static struct mlxsw_sp_ipip_entry * mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp, enum mlxsw_sp_ipip_type ipipt, struct net_device *ol_dev) { const struct mlxsw_sp_ipip_ops *ipip_ops; struct mlxsw_sp_ipip_entry *ipip_entry; struct mlxsw_sp_ipip_entry *ret = NULL; ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL); if (!ipip_entry) return ERR_PTR(-ENOMEM); ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt, ol_dev, NULL); if (IS_ERR(ipip_entry->ol_lb)) { ret = ERR_CAST(ipip_entry->ol_lb); goto err_ol_ipip_lb_create; } ipip_entry->ipipt = ipipt; ipip_entry->ol_dev = ol_dev; switch (ipip_ops->ul_proto) { case MLXSW_SP_L3_PROTO_IPV4: ipip_entry->parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev); break; case MLXSW_SP_L3_PROTO_IPV6: WARN_ON(1); break; } return ipip_entry; err_ol_ipip_lb_create: kfree(ipip_entry); return ret; } static void mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp_ipip_entry *ipip_entry) { mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); kfree(ipip_entry); } static bool mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp, const enum mlxsw_sp_l3proto ul_proto, union mlxsw_sp_l3addr saddr, u32 ul_tb_id, struct mlxsw_sp_ipip_entry *ipip_entry) { u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; union mlxsw_sp_l3addr tun_saddr; if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) return false; tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); return tun_ul_tb_id == ul_tb_id && mlxsw_sp_l3addr_eq(&tun_saddr, &saddr); } static int mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, struct mlxsw_sp_ipip_entry *ipip_entry) { u32 tunnel_index; int err; err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, &tunnel_index); if (err) return err; ipip_entry->decap_fib_entry = fib_entry; fib_entry->decap.ipip_entry = ipip_entry; fib_entry->decap.tunnel_index = tunnel_index; return 0; } static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry) { /* Unlink this node from the IPIP entry that it's the decap entry of. */ fib_entry->decap.ipip_entry->decap_fib_entry = NULL; fib_entry->decap.ipip_entry = NULL; mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, fib_entry->decap.tunnel_index); } static struct mlxsw_sp_fib_node * mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, size_t addr_len, unsigned char prefix_len); static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry); static void mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry; mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); } static void mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, struct mlxsw_sp_fib_entry *decap_fib_entry) { if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry, ipip_entry)) return; decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry)) mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); } static struct mlxsw_sp_fib_entry * mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id, enum mlxsw_sp_l3proto proto, const union mlxsw_sp_l3addr *addr, enum mlxsw_sp_fib_entry_type type) { struct mlxsw_sp_fib_entry *fib_entry; struct mlxsw_sp_fib_node *fib_node; unsigned char addr_prefix_len; struct mlxsw_sp_fib *fib; struct mlxsw_sp_vr *vr; const void *addrp; size_t addr_len; u32 addr4; vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); if (!vr) return NULL; fib = mlxsw_sp_vr_fib(vr, proto); switch (proto) { case MLXSW_SP_L3_PROTO_IPV4: addr4 = be32_to_cpu(addr->addr4); addrp = &addr4; addr_len = 4; addr_prefix_len = 32; break; case MLXSW_SP_L3_PROTO_IPV6: /* fall through */ default: WARN_ON(1); return NULL; } fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len, addr_prefix_len); if (!fib_node || list_empty(&fib_node->entry_list)) return NULL; fib_entry = list_first_entry(&fib_node->entry_list, struct mlxsw_sp_fib_entry, list); if (fib_entry->type != type) return NULL; return fib_entry; } /* Given an IPIP entry, find the corresponding decap route. */ static struct mlxsw_sp_fib_entry * mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { static struct mlxsw_sp_fib_node *fib_node; const struct mlxsw_sp_ipip_ops *ipip_ops; struct mlxsw_sp_fib_entry *fib_entry; unsigned char saddr_prefix_len; union mlxsw_sp_l3addr saddr; struct mlxsw_sp_fib *ul_fib; struct mlxsw_sp_vr *ul_vr; const void *saddrp; size_t saddr_len; u32 ul_tb_id; u32 saddr4; ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id); if (!ul_vr) return NULL; ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto); saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto, ipip_entry->ol_dev); switch (ipip_ops->ul_proto) { case MLXSW_SP_L3_PROTO_IPV4: saddr4 = be32_to_cpu(saddr.addr4); saddrp = &saddr4; saddr_len = 4; saddr_prefix_len = 32; break; case MLXSW_SP_L3_PROTO_IPV6: WARN_ON(1); return NULL; } fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len, saddr_prefix_len); if (!fib_node || list_empty(&fib_node->entry_list)) return NULL; fib_entry = list_first_entry(&fib_node->entry_list, struct mlxsw_sp_fib_entry, list); if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP) return NULL; return fib_entry; } static struct mlxsw_sp_ipip_entry * mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, enum mlxsw_sp_ipip_type ipipt, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev); if (IS_ERR(ipip_entry)) return ipip_entry; list_add_tail(&ipip_entry->ipip_list_node, &mlxsw_sp->router->ipip_list); return ipip_entry; } static void mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { list_del(&ipip_entry->ipip_list_node); mlxsw_sp_ipip_entry_dealloc(ipip_entry); } static bool mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp, const struct net_device *ul_dev, enum mlxsw_sp_l3proto ul_proto, union mlxsw_sp_l3addr ul_dip, struct mlxsw_sp_ipip_entry *ipip_entry) { u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) return false; return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip, ul_tb_id, ipip_entry); } /* Given decap parameters, find the corresponding IPIP entry. */ static struct mlxsw_sp_ipip_entry * mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, const struct net_device *ul_dev, enum mlxsw_sp_l3proto ul_proto, union mlxsw_sp_l3addr ul_dip) { struct mlxsw_sp_ipip_entry *ipip_entry; list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, ipip_list_node) if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev, ul_proto, ul_dip, ipip_entry)) return ipip_entry; return NULL; } static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp, const struct net_device *dev, enum mlxsw_sp_ipip_type *p_type) { struct mlxsw_sp_router *router = mlxsw_sp->router; const struct mlxsw_sp_ipip_ops *ipip_ops; enum mlxsw_sp_ipip_type ipipt; for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) { ipip_ops = router->ipip_ops_arr[ipipt]; if (dev->type == ipip_ops->dev_type) { if (p_type) *p_type = ipipt; return true; } } return false; } bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) { return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); } static struct mlxsw_sp_ipip_entry * mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp, const struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, ipip_list_node) if (ipip_entry->ol_dev == ol_dev) return ipip_entry; return NULL; } static struct mlxsw_sp_ipip_entry * mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp, const struct net_device *ul_dev, struct mlxsw_sp_ipip_entry *start) { struct mlxsw_sp_ipip_entry *ipip_entry; ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list, ipip_list_node); list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list, ipip_list_node) { struct net_device *ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); if (ipip_ul_dev == ul_dev) return ipip_entry; } return NULL; } bool mlxsw_sp_netdev_is_ipip_ul(const struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) { return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL); } static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp, const struct net_device *ol_dev, enum mlxsw_sp_ipip_type ipipt) { const struct mlxsw_sp_ipip_ops *ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; /* For deciding whether decap should be offloaded, we don't care about * overlay protocol, so ask whether either one is supported. */ return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) || ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6); } static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; enum mlxsw_sp_l3proto ul_proto; enum mlxsw_sp_ipip_type ipipt; union mlxsw_sp_l3addr saddr; u32 ul_tb_id; mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt); if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) { ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto; saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, saddr, ul_tb_id, NULL)) { ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt, ol_dev); if (IS_ERR(ipip_entry)) return PTR_ERR(ipip_entry); } } return 0; } static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); if (ipip_entry) mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); } static void mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { struct mlxsw_sp_fib_entry *decap_fib_entry; decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry); if (decap_fib_entry) mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry, decap_fib_entry); } static int mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id, u16 ul_rif_id, bool enable) { struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config; struct mlxsw_sp_rif *rif = &lb_rif->common; struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; char ritr_pl[MLXSW_REG_RITR_LEN]; u32 saddr4; switch (lb_cf.ul_protocol) { case MLXSW_SP_L3_PROTO_IPV4: saddr4 = be32_to_cpu(lb_cf.saddr.addr4); mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, rif->rif_index, rif->vr_id, rif->dev->mtu); mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt, MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET, ul_vr_id, ul_rif_id, saddr4, lb_cf.okey); break; case MLXSW_SP_L3_PROTO_IPV6: return -EAFNOSUPPORT; } return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; struct mlxsw_sp_rif_ipip_lb *lb_rif; int err = 0; ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); if (ipip_entry) { lb_rif = ipip_entry->ol_lb; err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id, lb_rif->ul_rif_id, true); if (err) goto out; lb_rif->common.mtu = ol_dev->mtu; } out: return err; } static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); if (ipip_entry) mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); } static void mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { if (ipip_entry->decap_fib_entry) mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); } static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev) { struct mlxsw_sp_ipip_entry *ipip_entry; ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); if (ipip_entry) mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); } static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *old_rif, struct mlxsw_sp_rif *new_rif); static int mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, bool keep_encap, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb; struct mlxsw_sp_rif_ipip_lb *new_lb_rif; new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipip_entry->ipipt, ipip_entry->ol_dev, extack); if (IS_ERR(new_lb_rif)) return PTR_ERR(new_lb_rif); ipip_entry->ol_lb = new_lb_rif; if (keep_encap) mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common, &new_lb_rif->common); mlxsw_sp_rif_destroy(&old_lb_rif->common); return 0; } static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif); /** * Update the offload related to an IPIP entry. This always updates decap, and * in addition to that it also: * @recreate_loopback: recreates the associated loopback RIF * @keep_encap: updates next hops that use the tunnel netdevice. This is only * relevant when recreate_loopback is true. * @update_nexthops: updates next hops, keeping the current loopback RIF. This * is only relevant when recreate_loopback is false. */ int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, bool recreate_loopback, bool keep_encap, bool update_nexthops, struct netlink_ext_ack *extack) { int err; /* RIFs can't be edited, so to update loopback, we need to destroy and * recreate it. That creates a window of opportunity where RALUE and * RATR registers end up referencing a RIF that's already gone. RATRs * are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care * of RALUE, demote the decap route back. */ if (ipip_entry->decap_fib_entry) mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); if (recreate_loopback) { err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry, keep_encap, extack); if (err) return err; } else if (update_nexthops) { mlxsw_sp_nexthop_rif_update(mlxsw_sp, &ipip_entry->ol_lb->common); } if (ipip_entry->ol_dev->flags & IFF_UP) mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); return 0; } static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev, struct netlink_ext_ack *extack) { struct mlxsw_sp_ipip_entry *ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 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, struct netlink_ext_ack *extack) { return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, true, true, false, extack); } static int mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, struct net_device *ul_dev) { return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, false, false, true, NULL); } static int mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, struct net_device *ul_dev) { /* A down underlay device causes encapsulated packets to not be * forwarded, but decap still works. So refresh next hops without * touching anything else. */ return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, false, false, true, NULL); } static int mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev, struct netlink_ext_ack *extack) { const struct mlxsw_sp_ipip_ops *ipip_ops; struct mlxsw_sp_ipip_entry *ipip_entry; int err; ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); if (!ipip_entry) /* A change might make a tunnel eligible for offloading, but * that is currently not implemented. What falls to slow path * stays there. */ return 0; /* A change might make a tunnel not eligible for offloading. */ if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipip_entry->ipipt)) { mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); return 0; } ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack); return err; } void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry) { struct net_device *ol_dev = ipip_entry->ol_dev; if (ol_dev->flags & IFF_UP) mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); } /* The configuration where several tunnels have the same local address in the * same underlay table needs special treatment in the HW. That is currently not * implemented in the driver. This function finds and demotes the first tunnel * with a given source address, except the one passed in in the argument * `except'. */ bool mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp, enum mlxsw_sp_l3proto ul_proto, union mlxsw_sp_l3addr saddr, u32 ul_tb_id, const struct mlxsw_sp_ipip_entry *except) { struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, ipip_list_node) { if (ipip_entry != except && mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, ul_tb_id, ipip_entry)) { mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); return true; } } return false; } static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp, struct net_device *ul_dev) { struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, ipip_list_node) { struct net_device *ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); if (ipip_ul_dev == ul_dev) mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); } } int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ol_dev, unsigned long event, struct netdev_notifier_info *info) { struct netdev_notifier_changeupper_info *chup; struct netlink_ext_ack *extack; switch (event) { case NETDEV_REGISTER: return mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev); case NETDEV_UNREGISTER: mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev); return 0; case NETDEV_UP: mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev); return 0; case NETDEV_DOWN: mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev); return 0; case NETDEV_CHANGEUPPER: chup = container_of(info, typeof(*chup), info); extack = info->extack; if (netif_is_l3_master(chup->upper_dev)) return mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp, ol_dev, extack); return 0; case NETDEV_CHANGE: extack = info->extack; return mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp, ol_dev, extack); case NETDEV_CHANGEMTU: return mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev); } return 0; } static int __mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_ipip_entry *ipip_entry, struct net_device *ul_dev, unsigned long event, struct netdev_notifier_info *info) { struct netdev_notifier_changeupper_info *chup; struct netlink_ext_ack *extack; switch (event) { case NETDEV_CHANGEUPPER: chup = container_of(info, typeof(*chup), info); extack = info->extack; if (netif_is_l3_master(chup->upper_dev)) return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp, ipip_entry, ul_dev, extack); break; case NETDEV_UP: return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry, ul_dev); case NETDEV_DOWN: return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp, ipip_entry, ul_dev); } return 0; } int mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, struct net_device *ul_dev, unsigned long event, struct netdev_notifier_info *info) { struct mlxsw_sp_ipip_entry *ipip_entry = NULL; int err; while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, ul_dev, ipip_entry))) { err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry, ul_dev, event, info); if (err) { mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp, ul_dev); return err; } } return 0; } int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, enum mlxsw_sp_l3proto ul_proto, const union mlxsw_sp_l3addr *ul_sip, u32 tunnel_index) { enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; struct mlxsw_sp_fib_entry *fib_entry; int err; /* It is valid to create a tunnel with a local IP and only later * assign this IP address to a local interface */ fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, ul_proto, ul_sip, type); if (!fib_entry) return 0; fib_entry->decap.tunnel_index = tunnel_index; fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); if (err) goto err_fib_entry_update; return 0; err_fib_entry_update: fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); return err; } void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, enum mlxsw_sp_l3proto ul_proto, const union mlxsw_sp_l3addr *ul_sip) { enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; struct mlxsw_sp_fib_entry *fib_entry; fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, ul_proto, ul_sip, type); if (!fib_entry) return; fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); } struct mlxsw_sp_neigh_key { struct neighbour *n; }; struct mlxsw_sp_neigh_entry { struct list_head rif_list_node; struct rhash_head ht_node; struct mlxsw_sp_neigh_key key; u16 rif; bool connected; unsigned char ha[ETH_ALEN]; struct list_head nexthop_list; /* list of nexthops using * this neigh entry */ struct list_head nexthop_neighs_list_node; unsigned int counter_index; bool counter_valid; }; static const struct rhashtable_params mlxsw_sp_neigh_ht_params = { .key_offset = offsetof(struct mlxsw_sp_neigh_entry, key), .head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node), .key_len = sizeof(struct mlxsw_sp_neigh_key), }; struct mlxsw_sp_neigh_entry * mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif, struct mlxsw_sp_neigh_entry *neigh_entry) { if (!neigh_entry) { if (list_empty(&rif->neigh_list)) return NULL; else return list_first_entry(&rif->neigh_list, typeof(*neigh_entry), rif_list_node); } if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list)) return NULL; return list_next_entry(neigh_entry, rif_list_node); } int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry) { return neigh_entry->key.n->tbl->family; } unsigned char * mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry) { return neigh_entry->ha; } u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) { struct neighbour *n; n = neigh_entry->key.n; return ntohl(*((__be32 *) n->primary_key)); } struct in6_addr * mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) { struct neighbour *n; n = neigh_entry->key.n; return (struct in6_addr *) &n->primary_key; } int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry, u64 *p_counter) { if (!neigh_entry->counter_valid) return -EINVAL; return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index, p_counter, NULL); } static struct mlxsw_sp_neigh_entry * mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n, u16 rif) { struct mlxsw_sp_neigh_entry *neigh_entry; neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL); if (!neigh_entry) return NULL; neigh_entry->key.n = n; neigh_entry->rif = rif; INIT_LIST_HEAD(&neigh_entry->nexthop_list); return neigh_entry; } static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry) { kfree(neigh_entry); } static int mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht, &neigh_entry->ht_node, mlxsw_sp_neigh_ht_params); } static void mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht, &neigh_entry->ht_node, mlxsw_sp_neigh_ht_params); } static bool mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { struct devlink *devlink; const char *table_name; switch (mlxsw_sp_neigh_entry_type(neigh_entry)) { case AF_INET: table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4; break; case AF_INET6: table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6; break; default: WARN_ON(1); return false; } devlink = priv_to_devlink(mlxsw_sp->core); return devlink_dpipe_table_counter_enabled(devlink, table_name); } static void mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry)) return; if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index)) return; neigh_entry->counter_valid = true; } static void mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { if (!neigh_entry->counter_valid) return; mlxsw_sp_flow_counter_free(mlxsw_sp, neigh_entry->counter_index); neigh_entry->counter_valid = false; } static struct mlxsw_sp_neigh_entry * mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) { struct mlxsw_sp_neigh_entry *neigh_entry; struct mlxsw_sp_rif *rif; int err; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev); if (!rif) return ERR_PTR(-EINVAL); neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index); if (!neigh_entry) return ERR_PTR(-ENOMEM); err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); if (err) goto err_neigh_entry_insert; mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); list_add(&neigh_entry->rif_list_node, &rif->neigh_list); return neigh_entry; err_neigh_entry_insert: mlxsw_sp_neigh_entry_free(neigh_entry); return ERR_PTR(err); } static void mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry) { list_del(&neigh_entry->rif_list_node); mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); mlxsw_sp_neigh_entry_free(neigh_entry); } static struct mlxsw_sp_neigh_entry * mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) { struct mlxsw_sp_neigh_key key; key.n = n; return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht, &key, mlxsw_sp_neigh_ht_params); } static void mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp) { unsigned long interval; #if IS_ENABLED(CONFIG_IPV6) interval = min_t(unsigned long, NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME), NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME)); #else interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME); #endif mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval); } static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int ent_index) { struct net_device *dev; struct neighbour *n; __be32 dipn; u32 dip; u16 rif; mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip); if (!mlxsw_sp->router->rifs[rif]) { dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); return; } dipn = htonl(dip); dev = mlxsw_sp->router->rifs[rif]->dev; n = neigh_lookup(&arp_tbl, &dipn, dev); if (!n) return; netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); neigh_event_send(n, NULL); neigh_release(n); } #if IS_ENABLED(CONFIG_IPV6) static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int rec_index) { struct net_device *dev; struct neighbour *n; struct in6_addr dip; u16 rif; mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif, (char *) &dip); if (!mlxsw_sp->router->rifs[rif]) { dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); return; } dev = mlxsw_sp->router->rifs[rif]->dev; n = neigh_lookup(&nd_tbl, &dip, dev); if (!n) return; netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip); neigh_event_send(n, NULL); neigh_release(n); } #else static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int rec_index) { } #endif static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int rec_index) { u8 num_entries; int i; num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, rec_index); /* Hardware starts counting at 0, so add 1. */ num_entries++; /* Each record consists of several neighbour entries. */ for (i = 0; i < num_entries; i++) { int ent_index; ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i; mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl, ent_index); } } static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int rec_index) { /* One record contains one entry. */ mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl, rec_index); } static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, int rec_index) { switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) { case MLXSW_REG_RAUHTD_TYPE_IPV4: mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl, rec_index); break; case MLXSW_REG_RAUHTD_TYPE_IPV6: mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl, rec_index); break; } } static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl) { u8 num_rec, last_rec_index, num_entries; num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); last_rec_index = num_rec - 1; if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM) return false; if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) == MLXSW_REG_RAUHTD_TYPE_IPV6) return true; num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, last_rec_index); if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC) return true; return false; } static int __mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp, char *rauhtd_pl, enum mlxsw_reg_rauhtd_type type) { int i, num_rec; int err; /* Make sure the neighbour's netdev isn't removed in the * process. */ rtnl_lock(); do { mlxsw_reg_rauhtd_pack(rauhtd_pl, type); err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd), rauhtd_pl); if (err) { dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n"); break; } num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); for (i = 0; i < num_rec; i++) mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl, i); } while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl)); rtnl_unlock(); return err; } static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp) { enum mlxsw_reg_rauhtd_type type; char *rauhtd_pl; int err; rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL); if (!rauhtd_pl) return -ENOMEM; type = MLXSW_REG_RAUHTD_TYPE_IPV4; err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); if (err) goto out; type = MLXSW_REG_RAUHTD_TYPE_IPV6; err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); out: kfree(rauhtd_pl); return err; } static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_neigh_entry *neigh_entry; /* Take RTNL mutex here to prevent lists from changes */ rtnl_lock(); list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list, nexthop_neighs_list_node) /* If this neigh have nexthops, make the kernel think this neigh * is active regardless of the traffic. */ neigh_event_send(neigh_entry->key.n, NULL); rtnl_unlock(); } static void mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp) { unsigned long interval = mlxsw_sp->router->neighs_update.interval; mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, msecs_to_jiffies(interval)); } static void mlxsw_sp_router_neighs_update_work(struct work_struct *work) { struct mlxsw_sp_router *router; int err; router = container_of(work, struct mlxsw_sp_router, neighs_update.dw.work); err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp); if (err) dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity"); mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp); mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp); } static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work) { struct mlxsw_sp_neigh_entry *neigh_entry; struct mlxsw_sp_router *router; router = container_of(work, struct mlxsw_sp_router, nexthop_probe_dw.work); /* Iterate over nexthop neighbours, find those who are unresolved and * send arp on them. This solves the chicken-egg problem when * the nexthop wouldn't get offloaded until the neighbor is resolved * but it wouldn't get resolved ever in case traffic is flowing in HW * using different nexthop. * * Take RTNL mutex here to prevent lists from changes. */ rtnl_lock(); list_for_each_entry(neigh_entry, &router->nexthop_neighs_list, nexthop_neighs_list_node) if (!neigh_entry->connected) neigh_event_send(neigh_entry->key.n, NULL); rtnl_unlock(); mlxsw_core_schedule_dw(&router->nexthop_probe_dw, MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL); } static void mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry, bool removing, 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; /* Packets with a link-local destination address are trapped * after LPM lookup and never reach the neighbour table, so * there is no need to program such neighbours to the device. */ if (ipv6_addr_type((struct in6_addr *) &n->primary_key) & IPV6_ADDR_LINKLOCAL) return true; return false; } static void mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_neigh_entry *neigh_entry, bool adding) { 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; /* If these parameters are changed after we release the lock, * then we are guaranteed to receive another event letting us * know about it. */ read_lock_bh(&n->lock); memcpy(ha, n->ha, ETH_ALEN); nud_state = n->nud_state; dead = n->dead; read_unlock_bh(&n->lock); rtnl_lock(); mlxsw_sp_span_respin(mlxsw_sp); entry_connected = nud_state & NUD_VALID && !dead; neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); if (!entry_connected && !neigh_entry) goto out; if (!neigh_entry) { neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); if (IS_ERR(neigh_entry)) goto out; } memcpy(neigh_entry->ha, ha, ETH_ALEN); mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected); mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected, dead); if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); out: rtnl_unlock(); neigh_release(n); kfree(net_work); } static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp); static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work) { struct mlxsw_sp_netevent_work *net_work = container_of(work, struct mlxsw_sp_netevent_work, work); struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; mlxsw_sp_mp_hash_init(mlxsw_sp); kfree(net_work); } static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp); static void mlxsw_sp_router_update_priority_work(struct work_struct *work) { struct mlxsw_sp_netevent_work *net_work = container_of(work, struct mlxsw_sp_netevent_work, work); struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; __mlxsw_sp_router_init(mlxsw_sp); kfree(net_work); } static int mlxsw_sp_router_schedule_work(struct net *net, struct notifier_block *nb, void (*cb)(struct work_struct *)) { struct mlxsw_sp_netevent_work *net_work; struct mlxsw_sp_router *router; if (!net_eq(net, &init_net)) return NOTIFY_DONE; net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); if (!net_work) return NOTIFY_BAD; router = container_of(nb, struct mlxsw_sp_router, netevent_nb); INIT_WORK(&net_work->work, cb); net_work->mlxsw_sp = router->mlxsw_sp; mlxsw_core_schedule_work(&net_work->work); return NOTIFY_DONE; } static int mlxsw_sp_router_netevent_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct mlxsw_sp_netevent_work *net_work; struct mlxsw_sp_port *mlxsw_sp_port; struct mlxsw_sp *mlxsw_sp; unsigned long interval; struct neigh_parms *p; struct neighbour *n; switch (event) { case NETEVENT_DELAY_PROBE_TIME_UPDATE: p = ptr; /* We don't care about changes in the default table. */ if (!p->dev || (p->tbl->family != AF_INET && p->tbl->family != AF_INET6)) return NOTIFY_DONE; /* We are in atomic context and can't take RTNL mutex, * so use RCU variant to walk the device chain. */ mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev); if (!mlxsw_sp_port) return NOTIFY_DONE; mlxsw_sp = mlxsw_sp_port->mlxsw_sp; interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME)); mlxsw_sp->router->neighs_update.interval = interval; mlxsw_sp_port_dev_put(mlxsw_sp_port); break; case NETEVENT_NEIGH_UPDATE: n = ptr; if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6) return NOTIFY_DONE; mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev); if (!mlxsw_sp_port) return NOTIFY_DONE; net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); if (!net_work) { mlxsw_sp_port_dev_put(mlxsw_sp_port); return NOTIFY_BAD; } INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work); net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp; net_work->n = n; /* Take a reference to ensure the neighbour won't be * destructed until we drop the reference in delayed * work. */ neigh_clone(n); mlxsw_core_schedule_work(&net_work->work); mlxsw_sp_port_dev_put(mlxsw_sp_port); break; case NETEVENT_IPV4_MPATH_HASH_UPDATE: case NETEVENT_IPV6_MPATH_HASH_UPDATE: return mlxsw_sp_router_schedule_work(ptr, nb, mlxsw_sp_router_mp_hash_event_work); case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE: return mlxsw_sp_router_schedule_work(ptr, nb, mlxsw_sp_router_update_priority_work); } return NOTIFY_DONE; } static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp) { int err; err = rhashtable_init(&mlxsw_sp->router->neigh_ht, &mlxsw_sp_neigh_ht_params); if (err) return err; /* Initialize the polling interval according to the default * table. */ mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp); /* Create the delayed works for the activity_update */ INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw, mlxsw_sp_router_neighs_update_work); INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw, mlxsw_sp_router_probe_unresolved_nexthops); mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0); mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0); return 0; } static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp) { cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw); cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw); rhashtable_destroy(&mlxsw_sp->router->neigh_ht); } static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif) { struct mlxsw_sp_neigh_entry *neigh_entry, *tmp; list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list, rif_list_node) { mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false); mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); } } enum mlxsw_sp_nexthop_type { MLXSW_SP_NEXTHOP_TYPE_ETH, MLXSW_SP_NEXTHOP_TYPE_IPIP, }; struct mlxsw_sp_nexthop_key { struct fib_nh *fib_nh; }; struct mlxsw_sp_nexthop { struct list_head neigh_list_node; /* member of neigh entry list */ struct list_head rif_list_node; struct list_head router_list_node; struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group * this belongs to */ struct rhash_head ht_node; struct mlxsw_sp_nexthop_key key; unsigned char gw_addr[sizeof(struct in6_addr)]; int ifindex; int nh_weight; int norm_nh_weight; int num_adj_entries; struct mlxsw_sp_rif *rif; u8 should_offload:1, /* set indicates this neigh is connected and * should be put to KVD linear area of this group. */ offloaded:1, /* set in case the neigh is actually put into * KVD linear area of this group. */ update:1; /* set indicates that MAC of this neigh should be * updated in HW */ enum mlxsw_sp_nexthop_type type; union { struct mlxsw_sp_neigh_entry *neigh_entry; struct mlxsw_sp_ipip_entry *ipip_entry; }; unsigned int counter_index; bool counter_valid; }; struct mlxsw_sp_nexthop_group { void *priv; struct rhash_head ht_node; struct list_head fib_list; /* list of fib entries that use this group */ struct neigh_table *neigh_tbl; u8 adj_index_valid:1, gateway:1; /* routes using the group use a gateway */ u32 adj_index; u16 ecmp_size; u16 count; int sum_norm_weight; struct mlxsw_sp_nexthop nexthops[0]; #define nh_rif nexthops[0].rif }; void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh) { struct devlink *devlink; devlink = priv_to_devlink(mlxsw_sp->core); if (!devlink_dpipe_table_counter_enabled(devlink, MLXSW_SP_DPIPE_TABLE_NAME_ADJ)) return; if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index)) return; nh->counter_valid = true; } void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh) { if (!nh->counter_valid) return; mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index); nh->counter_valid = false; } int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh, u64 *p_counter) { if (!nh->counter_valid) return -EINVAL; return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index, p_counter, NULL); } struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router, struct mlxsw_sp_nexthop *nh) { if (!nh) { if (list_empty(&router->nexthop_list)) return NULL; else return list_first_entry(&router->nexthop_list, typeof(*nh), router_list_node); } if (list_is_last(&nh->router_list_node, &router->nexthop_list)) return NULL; return list_next_entry(nh, router_list_node); } bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh) { return nh->offloaded; } unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh) { if (!nh->offloaded) return NULL; return nh->neigh_entry->ha; } int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index, u32 *p_adj_size, u32 *p_adj_hash_index) { struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; u32 adj_hash_index = 0; int i; if (!nh->offloaded || !nh_grp->adj_index_valid) return -EINVAL; *p_adj_index = nh_grp->adj_index; *p_adj_size = nh_grp->ecmp_size; for (i = 0; i < nh_grp->count; i++) { struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; if (nh_iter == nh) break; if (nh_iter->offloaded) adj_hash_index += nh_iter->num_adj_entries; } *p_adj_hash_index = adj_hash_index; return 0; } struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh) { return nh->rif; } bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh) { struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; int i; for (i = 0; i < nh_grp->count; i++) { struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP) return true; } return false; } static struct fib_info * mlxsw_sp_nexthop4_group_fi(const struct mlxsw_sp_nexthop_group *nh_grp) { return nh_grp->priv; } struct mlxsw_sp_nexthop_group_cmp_arg { enum mlxsw_sp_l3proto proto; union { struct fib_info *fi; struct mlxsw_sp_fib6_entry *fib6_entry; }; }; 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->count; i++) { const struct mlxsw_sp_nexthop *nh; nh = &nh_grp->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->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; switch (cmp_arg->proto) { case MLXSW_SP_L3_PROTO_IPV4: return cmp_arg->fi != mlxsw_sp_nexthop4_group_fi(nh_grp); case MLXSW_SP_L3_PROTO_IPV6: return !mlxsw_sp_nexthop6_group_cmp(nh_grp, cmp_arg->fib6_entry); default: WARN_ON(1); return 1; } } static int mlxsw_sp_nexthop_group_type(const struct mlxsw_sp_nexthop_group *nh_grp) { return nh_grp->neigh_tbl->family; } 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 (mlxsw_sp_nexthop_group_type(nh_grp)) { case AF_INET: fi = mlxsw_sp_nexthop4_group_fi(nh_grp); return jhash(&fi, sizeof(fi), seed); case AF_INET6: val = nh_grp->count; for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed); } return jhash(&val, sizeof(val), 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; struct net_device *dev; list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { dev = mlxsw_sp_rt6->rt->fib6_nh->fib_nh_dev; val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), 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->proto) { case MLXSW_SP_L3_PROTO_IPV4: return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed); case MLXSW_SP_L3_PROTO_IPV6: return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, 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 (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && !nh_grp->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 (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && !nh_grp->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.proto = MLXSW_SP_L3_PROTO_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.proto = MLXSW_SP_L3_PROTO_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, const struct mlxsw_sp_fib *fib, 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) fib->proto, fib->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_fib_entry *fib_entry; struct mlxsw_sp_fib *fib = NULL; int err; list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { if (fib == fib_entry->fib_node->fib) continue; fib = fib_entry->fib_node->fib; err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, fib, old_adj_index, old_ecmp_size, nh_grp->adj_index, nh_grp->ecmp_size); if (err) return err; } return 0; } 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, neigh_entry->rif); 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 *nh_grp, bool reallocate) { u32 adj_index = nh_grp->adj_index; /* base */ struct mlxsw_sp_nexthop *nh; int i; int err; for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; if (!nh->should_offload) { nh->offloaded = 0; continue; } if (nh->update || reallocate) { 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 bool mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, const struct mlxsw_sp_fib_entry *fib_entry); 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) { if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, fib_entry)) continue; err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); if (err) return err; } return 0; } static void mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op, int err); static void mlxsw_sp_nexthop_fib_entries_refresh(struct mlxsw_sp_nexthop_group *nh_grp) { enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_WRITE; struct mlxsw_sp_fib_entry *fib_entry; list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, fib_entry)) continue; mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); } } static void mlxsw_sp_adj_grp_size_round_up(u16 *p_adj_grp_size) { /* Valid sizes for an adjacency group are: * 1-64, 512, 1024, 2048 and 4096. */ 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; /* Round up the requested group size to the next size supported * by the device and make sure the request can be satisfied. */ 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; /* It is possible the allocation results in more allocated * entries than requested. Try to use as much of them as * possible. */ 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 *nh_grp) { int i, g = 0, sum_norm_weight = 0; struct mlxsw_sp_nexthop *nh; for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->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 < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; if (!nh->should_offload) continue; nh->norm_nh_weight = nh->nh_weight / g; sum_norm_weight += nh->norm_nh_weight; } nh_grp->sum_norm_weight = sum_norm_weight; } static void mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group *nh_grp) { int total = nh_grp->sum_norm_weight; u16 ecmp_size = nh_grp->ecmp_size; int i, weight = 0, lower_bound = 0; for (i = 0; i < nh_grp->count; i++) { struct mlxsw_sp_nexthop *nh = &nh_grp->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 void mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop_group *nh_grp) { u16 ecmp_size, old_ecmp_size; struct mlxsw_sp_nexthop *nh; bool offload_change = false; u32 adj_index; bool old_adj_index_valid; u32 old_adj_index; int i; int err; if (!nh_grp->gateway) { mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); return; } for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; if (nh->should_offload != nh->offloaded) { offload_change = true; if (nh->should_offload) nh->update = 1; } } if (!offload_change) { /* Nothing was added or removed, so no need to reallocate. Just * update MAC on existing adjacency indexes. */ err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, false); if (err) { dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); goto set_trap; } return; } mlxsw_sp_nexthop_group_normalize(nh_grp); if (!nh_grp->sum_norm_weight) /* No neigh of this group is connected so we just set * the trap and let everthing flow through kernel. */ goto set_trap; ecmp_size = nh_grp->sum_norm_weight; err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size); if (err) /* No valid allocation size available. */ goto set_trap; err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, ecmp_size, &adj_index); if (err) { /* We ran out of KVD linear space, just set the * trap and let everything flow through kernel. */ dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n"); goto set_trap; } old_adj_index_valid = nh_grp->adj_index_valid; old_adj_index = nh_grp->adj_index; old_ecmp_size = nh_grp->ecmp_size; nh_grp->adj_index_valid = 1; nh_grp->adj_index = adj_index; nh_grp->ecmp_size = ecmp_size; mlxsw_sp_nexthop_group_rebalance(nh_grp); err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, true); if (err) { dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); goto set_trap; } if (!old_adj_index_valid) { /* The trap was set for fib entries, so we have to call * fib entry update to unset it and use adjacency index. */ 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; } 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; } /* Offload state within the group changed, so update the flags. */ mlxsw_sp_nexthop_fib_entries_refresh(nh_grp); return; set_trap: old_adj_index_valid = nh_grp->adj_index_valid; nh_grp->adj_index_valid = 0; for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; nh->offloaded = 0; } err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); if (err) dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n"); if (old_adj_index_valid) mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, nh_grp->ecmp_size, nh_grp->adj_index); } 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->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); if (!n) { n = neigh_create(nh->nh_grp->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->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->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->nh_grp->gateway || nh->neigh_entry) return 0; /* Take a reference of neigh here ensuring that neigh would * not be destructed before the nexthop entry is finished. * The reference is taken either in neigh_lookup() or * in neigh_create() in case n is not found. */ n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); if (!n) { n = neigh_create(nh->nh_grp->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 that is the first nexthop connected to that neigh, add to * nexthop_neighs_list */ 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 that is the last nexthop connected to that neigh, remove from * nexthop_neighs_list */ 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 = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); return ul_dev ? (ul_dev->flags & IFF_UP) : true; } 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->nh_grp->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 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_type_init(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh, struct fib_nh *fib_nh) { const struct mlxsw_sp_ipip_ops *ipip_ops; struct net_device *dev = fib_nh->fib_nh_dev; 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, MLXSW_SP_L3_PROTO_IPV4)) { 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_nexthop4_type_fini(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh) { mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); } 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->nh_grp = nh_grp; 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)); 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; in_dev = __in_dev_get_rtnl(dev); if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) return 0; err = mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 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_nexthop4_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 (WARN_ON_ONCE(!nh)) return; switch (event) { case FIB_EVENT_NH_ADD: mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); break; case FIB_EVENT_NH_DEL: mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); break; } mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->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->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->nh_grp); } } 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 struct mlxsw_sp_nexthop_group * mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi) { unsigned int nhs = fib_info_num_path(fi); struct mlxsw_sp_nexthop_group *nh_grp; struct mlxsw_sp_nexthop *nh; struct fib_nh *fib_nh; int i; int err; nh_grp = kzalloc(struct_size(nh_grp, nexthops, nhs), GFP_KERNEL); if (!nh_grp) return ERR_PTR(-ENOMEM); nh_grp->priv = fi; INIT_LIST_HEAD(&nh_grp->fib_list); nh_grp->neigh_tbl = &arp_tbl; nh_grp->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, fi); nh_grp->count = nhs; fib_info_hold(fi); for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; fib_nh = fib_info_nh(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_insert(mlxsw_sp, nh_grp); if (err) goto err_nexthop_group_insert; mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); return nh_grp; err_nexthop_group_insert: err_nexthop4_init: for (i--; i >= 0; i--) { nh = &nh_grp->nexthops[i]; mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); } fib_info_put(fi); 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) { struct mlxsw_sp_nexthop *nh; int i; mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); for (i = 0; i < nh_grp->count; i++) { nh = &nh_grp->nexthops[i]; mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); } mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); WARN_ON_ONCE(nh_grp->adj_index_valid); fib_info_put(mlxsw_sp_nexthop4_group_fi(nh_grp)); 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; 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); } 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; 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->adj_index_valid; case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: return !!nh_group->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->count; i++) { struct mlxsw_sp_nexthop *nh = &nh_grp->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_offload_set(struct mlxsw_sp_fib_entry *fib_entry) { struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; int i; if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL || fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE || fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP || fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP) { nh_grp->nexthops->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD; return; } for (i = 0; i < nh_grp->count; i++) { struct mlxsw_sp_nexthop *nh = &nh_grp->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_fib4_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) { struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; int i; if (!list_is_singular(&nh_grp->fib_list)) return; for (i = 0; i < nh_grp->count; i++) { struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; } } static void mlxsw_sp_fib6_entry_offload_set(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); if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL || fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE) { list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, list)->rt->fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD; return; } list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 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_fib6_entry_offload_unset(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) { struct fib6_info *rt = mlxsw_sp_rt6->rt; rt->fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; } } static void mlxsw_sp_fib_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) { switch (fib_entry->fib_node->fib->proto) { case MLXSW_SP_L3_PROTO_IPV4: mlxsw_sp_fib4_entry_offload_set(fib_entry); break; case MLXSW_SP_L3_PROTO_IPV6: mlxsw_sp_fib6_entry_offload_set(fib_entry); break; } } static void mlxsw_sp_fib_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) { switch (fib_entry->fib_node->fib->proto) { case MLXSW_SP_L3_PROTO_IPV4: mlxsw_sp_fib4_entry_offload_unset(fib_entry); break; case MLXSW_SP_L3_PROTO_IPV6: mlxsw_sp_fib6_entry_offload_unset(fib_entry); break; } } static void mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op, int err) { switch (op) { case MLXSW_REG_RALUE_OP_WRITE_DELETE: return mlxsw_sp_fib_entry_offload_unset(fib_entry); case MLXSW_REG_RALUE_OP_WRITE_WRITE: if (err) return; if (mlxsw_sp_fib_entry_should_offload(fib_entry)) mlxsw_sp_fib_entry_offload_set(fib_entry); else mlxsw_sp_fib_entry_offload_unset(fib_entry); return; default: return; } } static void mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl, const struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib; enum mlxsw_reg_ralxx_protocol proto; u32 *p_dip; proto = (enum mlxsw_reg_ralxx_protocol) fib->proto; switch (fib->proto) { case MLXSW_SP_L3_PROTO_IPV4: p_dip = (u32 *) fib_entry->fib_node->key.addr; mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id, fib_entry->fib_node->key.prefix_len, *p_dip); break; case MLXSW_SP_L3_PROTO_IPV6: mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id, fib_entry->fib_node->key.prefix_len, fib_entry->fib_node->key.addr); break; } } static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { char ralue_pl[MLXSW_REG_RALUE_LEN]; enum mlxsw_reg_ralue_trap_action trap_action; u16 trap_id = 0; u32 adjacency_index = 0; u16 ecmp_size = 0; /* In case the nexthop group adjacency index is valid, use it * with provided ECMP size. Otherwise, setup trap and pass * traffic to kernel. */ if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; adjacency_index = fib_entry->nh_group->adj_index; ecmp_size = fib_entry->nh_group->ecmp_size; } else { trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; } mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id, adjacency_index, ecmp_size); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); } static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { struct mlxsw_sp_rif *rif = fib_entry->nh_group->nh_rif; enum mlxsw_reg_ralue_trap_action trap_action; char ralue_pl[MLXSW_REG_RALUE_LEN]; 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_ralue_pack(ralue_pl, fib_entry, op); mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, rif_index); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); } static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { char ralue_pl[MLXSW_REG_RALUE_LEN]; mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); } static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { enum mlxsw_reg_ralue_trap_action trap_action; char ralue_pl[MLXSW_REG_RALUE_LEN]; trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR; mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, 0, 0); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); } static int mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry; const struct mlxsw_sp_ipip_ops *ipip_ops; if (WARN_ON(!ipip_entry)) return -EINVAL; ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; return ipip_ops->fib_entry_op(mlxsw_sp, ipip_entry, op, fib_entry->decap.tunnel_index); } static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { char ralue_pl[MLXSW_REG_RALUE_LEN]; mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl, fib_entry->decap.tunnel_index); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); } static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { switch (fib_entry->type) { case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op); case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op); case MLXSW_SP_FIB_ENTRY_TYPE_TRAP: return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op); case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, fib_entry, op); case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, fib_entry, op); case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, fib_entry, op); } return -EINVAL; } static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, enum mlxsw_reg_ralue_op op) { int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op); mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, err); return err; } static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry) { return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, MLXSW_REG_RALUE_OP_WRITE_WRITE); } static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry) { return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, MLXSW_REG_RALUE_OP_WRITE_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 net_device *dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev; union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) }; u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id); struct mlxsw_sp_ipip_entry *ipip_entry; struct fib_info *fi = fen_info->fi; switch (fen_info->type) { case RTN_LOCAL: ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, dev, 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_nve_ipv4_route_is_decap(mlxsw_sp, tb_id, dip.addr4)) { u32 t_index; t_index = mlxsw_sp_nve_decap_tunnel_index_get(mlxsw_sp); fib_entry->decap.tunnel_index = t_index; fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; return 0; } /* fall through */ 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: /* fall through */ case RTN_PROHIBIT: /* Packets hitting these routes need to be trapped, but * can do so with a lower priority than packets directed * at the host, so use action type local instead of trap. */ fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; return 0; case RTN_UNICAST: if (mlxsw_sp_fi_is_gateway(mlxsw_sp, fi)) 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 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; err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry); if (err) goto err_fib4_entry_type_set; err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi); if (err) goto err_nexthop4_group_get; fib4_entry->prio = fen_info->fi->fib_priority; 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_nexthop4_group_get: err_fib4_entry_type_set: 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) { mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 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; list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { if (fib4_entry->tb_id == fen_info->tb_id && fib4_entry->tos == fen_info->tos && fib4_entry->type == fen_info->type && mlxsw_sp_nexthop4_group_fi(fib4_entry->common.nh_group) == 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; INIT_LIST_HEAD(&fib_node->entry_list); 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); WARN_ON(!list_empty(&fib_node->entry_list)); kfree(fib_node); } static bool mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, const struct mlxsw_sp_fib_entry *fib_entry) { return list_first_entry(&fib_node->entry_list, struct mlxsw_sp_fib_entry, list) == fib_entry; } 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; /* Try to construct a new LPM tree from the current prefix usage * minus the unused one. If we fail, continue using the old one. */ 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 (!list_empty(&fib_node->entry_list)) 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 struct mlxsw_sp_fib4_entry * mlxsw_sp_fib4_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, const struct mlxsw_sp_fib4_entry *new4_entry) { struct mlxsw_sp_fib4_entry *fib4_entry; list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { if (fib4_entry->tb_id > new4_entry->tb_id) continue; if (fib4_entry->tb_id != new4_entry->tb_id) break; if (fib4_entry->tos > new4_entry->tos) continue; if (fib4_entry->prio >= new4_entry->prio || fib4_entry->tos < new4_entry->tos) return fib4_entry; } return NULL; } static int mlxsw_sp_fib4_node_list_append(struct mlxsw_sp_fib4_entry *fib4_entry, struct mlxsw_sp_fib4_entry *new4_entry) { struct mlxsw_sp_fib_node *fib_node; if (WARN_ON(!fib4_entry)) return -EINVAL; fib_node = fib4_entry->common.fib_node; list_for_each_entry_from(fib4_entry, &fib_node->entry_list, common.list) { if (fib4_entry->tb_id != new4_entry->tb_id || fib4_entry->tos != new4_entry->tos || fib4_entry->prio != new4_entry->prio) break; } list_add_tail(&new4_entry->common.list, &fib4_entry->common.list); return 0; } static int mlxsw_sp_fib4_node_list_insert(struct mlxsw_sp_fib4_entry *new4_entry, bool replace, bool append) { struct mlxsw_sp_fib_node *fib_node = new4_entry->common.fib_node; struct mlxsw_sp_fib4_entry *fib4_entry; fib4_entry = mlxsw_sp_fib4_node_entry_find(fib_node, new4_entry); if (append) return mlxsw_sp_fib4_node_list_append(fib4_entry, new4_entry); if (replace && WARN_ON(!fib4_entry)) return -EINVAL; /* Insert new entry before replaced one, so that we can later * remove the second. */ if (fib4_entry) { list_add_tail(&new4_entry->common.list, &fib4_entry->common.list); } else { struct mlxsw_sp_fib4_entry *last; list_for_each_entry(last, &fib_node->entry_list, common.list) { if (new4_entry->tb_id > last->tb_id) break; fib4_entry = last; } if (fib4_entry) list_add(&new4_entry->common.list, &fib4_entry->common.list); else list_add(&new4_entry->common.list, &fib_node->entry_list); } return 0; } static void mlxsw_sp_fib4_node_list_remove(struct mlxsw_sp_fib4_entry *fib4_entry) { list_del(&fib4_entry->common.list); } static int mlxsw_sp_fib_node_entry_add(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry) { struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) return 0; /* To prevent packet loss, overwrite the previously offloaded * entry. */ if (!list_is_singular(&fib_node->entry_list)) { enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); mlxsw_sp_fib_entry_offload_refresh(n, op, 0); } return mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); } static void mlxsw_sp_fib_node_entry_del(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry) { struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) return; /* Promote the next entry by overwriting the deleted entry */ if (!list_is_singular(&fib_node->entry_list)) { struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; mlxsw_sp_fib_entry_update(mlxsw_sp, n); mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); return; } mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry); } static int mlxsw_sp_fib4_node_entry_link(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib4_entry *fib4_entry, bool replace, bool append) { int err; err = mlxsw_sp_fib4_node_list_insert(fib4_entry, replace, append); if (err) return err; err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib4_entry->common); if (err) goto err_fib_node_entry_add; return 0; err_fib_node_entry_add: mlxsw_sp_fib4_node_list_remove(fib4_entry); return err; } static void mlxsw_sp_fib4_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib4_entry *fib4_entry) { mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib4_entry->common); mlxsw_sp_fib4_node_list_remove(fib4_entry); if (fib4_entry->common.type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP) mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, &fib4_entry->common); } static void mlxsw_sp_fib4_entry_replace(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib4_entry *fib4_entry, bool replace) { struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; struct mlxsw_sp_fib4_entry *replaced; if (!replace) return; /* We inserted the new entry before replaced one */ replaced = list_next_entry(fib4_entry, common.list); mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, replaced); mlxsw_sp_fib4_entry_destroy(mlxsw_sp, replaced); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); } static int mlxsw_sp_router_fib4_add(struct mlxsw_sp *mlxsw_sp, const struct fib_entry_notifier_info *fen_info, bool replace, bool append) { struct mlxsw_sp_fib4_entry *fib4_entry; 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; } err = mlxsw_sp_fib4_node_entry_link(mlxsw_sp, fib4_entry, replace, append); if (err) { dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n"); goto err_fib4_node_entry_link; } mlxsw_sp_fib4_entry_replace(mlxsw_sp, fib4_entry, replace); return 0; err_fib4_node_entry_link: 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 void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp, struct fib_entry_notifier_info *fen_info) { struct mlxsw_sp_fib4_entry *fib4_entry; struct mlxsw_sp_fib_node *fib_node; if (mlxsw_sp->router->aborted) return; fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info); if (WARN_ON(!fib4_entry)) return; fib_node = fib4_entry->common.fib_node; mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); } static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt) { /* Packets with link-local destination IP arriving to the router * are trapped to the CPU, so no need to program specific routes * for them. */ if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_LINKLOCAL) return true; /* Multicast routes aren't supported, so ignore them. Neighbour * Discovery packets are specifically trapped. */ if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST) return true; /* Cloned routes are irrelevant in the forwarding path. */ 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); /* In case of route replace, replaced route is deleted with * no notification. Take reference to prevent accessing freed * memory. */ 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) { mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); kfree(mlxsw_sp_rt6); } static bool mlxsw_sp_fib6_rt_can_mp(const struct fib6_info *rt) { /* RTF_CACHE routes are ignored */ return !(rt->fib6_flags & RTF_ADDRCONF) && rt->fib6_nh->fib_nh_gw_family; } 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_fib6_entry * mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node, const struct fib6_info *nrt, bool replace) { struct mlxsw_sp_fib6_entry *fib6_entry; if (!mlxsw_sp_fib6_rt_can_mp(nrt) || replace) return NULL; list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); /* RT6_TABLE_LOCAL and RT6_TABLE_MAIN share the same * virtual router. */ if (rt->fib6_table->tb6_id > nrt->fib6_table->tb6_id) continue; if (rt->fib6_table->tb6_id != nrt->fib6_table->tb6_id) break; if (rt->fib6_metric < nrt->fib6_metric) continue; if (rt->fib6_metric == nrt->fib6_metric && mlxsw_sp_fib6_rt_can_mp(rt)) return fib6_entry; if (rt->fib6_metric > nrt->fib6_metric) break; } return NULL; } 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_type_init(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop_group *nh_grp, struct mlxsw_sp_nexthop *nh, const struct fib6_info *rt) { const struct mlxsw_sp_ipip_ops *ipip_ops; struct mlxsw_sp_ipip_entry *ipip_entry; struct net_device *dev = rt->fib6_nh->fib_nh_dev; 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, MLXSW_SP_L3_PROTO_IPV6)) { 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_nexthop_neigh_init; return 0; err_nexthop_neigh_init: mlxsw_sp_nexthop_rif_fini(nh); return err; } static void mlxsw_sp_nexthop6_type_fini(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh) { mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); } 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->nh_grp = nh_grp; nh->nh_weight = rt->fib6_nh->fib_nh_weight; memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr)); 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_nexthop6_type_init(mlxsw_sp, nh_grp, nh, rt); } static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_nexthop *nh) { mlxsw_sp_nexthop6_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 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; struct mlxsw_sp_rt6 *mlxsw_sp_rt6; struct mlxsw_sp_nexthop *nh; int i = 0; int err; nh_grp = kzalloc(struct_size(nh_grp, nexthops, fib6_entry->nrt6), GFP_KERNEL); if (!nh_grp) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&nh_grp->fib_list); #if IS_ENABLED(CONFIG_IPV6) nh_grp->neigh_tbl = &nd_tbl; #endif mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, list); nh_grp->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); nh_grp->count = fib6_entry->nrt6; for (i = 0; i < nh_grp->count; i++) { struct fib6_info *rt = mlxsw_sp_rt6->rt; nh = &nh_grp->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); } err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); if (err) goto err_nexthop_group_insert; mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); return nh_grp; err_nexthop_group_insert: err_nexthop6_init: for (i--; i >= 0; i--) { nh = &nh_grp->nexthops[i]; mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); } 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) { struct mlxsw_sp_nexthop *nh; int i = nh_grp->count; mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); for (i--; i >= 0; i--) { nh = &nh_grp->nexthops[i]; mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); } mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); WARN_ON(nh_grp->adj_index_valid); kfree(nh_grp); } static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry) { struct mlxsw_sp_nexthop_group *nh_grp; 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); } 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; mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); } static int mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry) { struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; int err; 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; /* In case this entry is offloaded, then the adjacency index * currently associated with it in the device's table is that * of the old group. Start using the new one instead. */ err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); if (err) goto err_fib_node_entry_add; if (list_empty(&old_nh_grp->fib_list)) mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); return 0; err_fib_node_entry_add: 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; return err; } static int mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 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, 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_fib6_entry *fib6_entry, struct fib6_info **rt_arr, unsigned int nrt6) { struct mlxsw_sp_rt6 *mlxsw_sp_rt6; int i; for (i = 0; i < nrt6; i++) { mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt_arr[i]); if (WARN_ON_ONCE(!mlxsw_sp_rt6)) continue; fib6_entry->nrt6--; list_del(&mlxsw_sp_rt6->list); mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); } mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); } static void mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_entry *fib_entry, const struct fib6_info *rt) { /* Packets hitting RTF_REJECT routes need to be discarded by the * stack. We can rely on their destination device not having a * RIF (it's the loopback device) and can thus use action type * local, which will cause them to be trapped with a lower * priority than packets that need to be locally received. */ if (rt->fib6_flags & (RTF_LOCAL | RTF_ANYCAST)) fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; else if (rt->fib6_type == RTN_BLACKHOLE) fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; else if (rt->fib6_flags & RTF_REJECT) fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; else if (mlxsw_sp_rt6_is_gateway(mlxsw_sp, rt)) fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; else fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; } static void mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) { struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, list) { fib6_entry->nrt6--; list_del(&mlxsw_sp_rt6->list); mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); } } static struct mlxsw_sp_fib6_entry * mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_node *fib_node, struct fib6_info **rt_arr, unsigned int nrt6) { struct mlxsw_sp_fib6_entry *fib6_entry; struct mlxsw_sp_fib_entry *fib_entry; struct mlxsw_sp_rt6 *mlxsw_sp_rt6; int err, i; fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); if (!fib6_entry) return ERR_PTR(-ENOMEM); fib_entry = &fib6_entry->common; INIT_LIST_HEAD(&fib6_entry->rt6_list); 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++; } mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]); err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); if (err) goto err_nexthop6_group_get; fib_entry->fib_node = fib_node; return fib6_entry; err_nexthop6_group_get: 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); } kfree(fib6_entry); return ERR_PTR(err); } static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry) { mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); WARN_ON(fib6_entry->nrt6); kfree(fib6_entry); } static struct mlxsw_sp_fib6_entry * mlxsw_sp_fib6_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, const struct fib6_info *nrt, bool replace) { struct mlxsw_sp_fib6_entry *fib6_entry, *fallback = NULL; list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); if (rt->fib6_table->tb6_id > nrt->fib6_table->tb6_id) continue; if (rt->fib6_table->tb6_id != nrt->fib6_table->tb6_id) break; if (replace && rt->fib6_metric == nrt->fib6_metric) { if (mlxsw_sp_fib6_rt_can_mp(rt) == mlxsw_sp_fib6_rt_can_mp(nrt)) return fib6_entry; if (mlxsw_sp_fib6_rt_can_mp(nrt)) fallback = fallback ?: fib6_entry; } if (rt->fib6_metric > nrt->fib6_metric) return fallback ?: fib6_entry; } return fallback; } static int mlxsw_sp_fib6_node_list_insert(struct mlxsw_sp_fib6_entry *new6_entry, bool *p_replace) { struct mlxsw_sp_fib_node *fib_node = new6_entry->common.fib_node; struct fib6_info *nrt = mlxsw_sp_fib6_entry_rt(new6_entry); struct mlxsw_sp_fib6_entry *fib6_entry; fib6_entry = mlxsw_sp_fib6_node_entry_find(fib_node, nrt, *p_replace); if (*p_replace && !fib6_entry) *p_replace = false; if (fib6_entry) { list_add_tail(&new6_entry->common.list, &fib6_entry->common.list); } else { struct mlxsw_sp_fib6_entry *last; list_for_each_entry(last, &fib_node->entry_list, common.list) { struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(last); if (nrt->fib6_table->tb6_id > rt->fib6_table->tb6_id) break; fib6_entry = last; } if (fib6_entry) list_add(&new6_entry->common.list, &fib6_entry->common.list); else list_add(&new6_entry->common.list, &fib_node->entry_list); } return 0; } static void mlxsw_sp_fib6_node_list_remove(struct mlxsw_sp_fib6_entry *fib6_entry) { list_del(&fib6_entry->common.list); } static int mlxsw_sp_fib6_node_entry_link(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry, bool *p_replace) { int err; err = mlxsw_sp_fib6_node_list_insert(fib6_entry, p_replace); if (err) return err; err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); if (err) goto err_fib_node_entry_add; return 0; err_fib_node_entry_add: mlxsw_sp_fib6_node_list_remove(fib6_entry); return err; } static void mlxsw_sp_fib6_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry) { mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib6_entry->common); mlxsw_sp_fib6_node_list_remove(fib6_entry); } static struct mlxsw_sp_fib6_entry * mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, const struct fib6_info *rt) { struct mlxsw_sp_fib6_entry *fib6_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, rt->fib6_table->tb6_id); if (!vr) return NULL; fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr, sizeof(rt->fib6_dst.addr), rt->fib6_dst.plen); if (!fib_node) return NULL; list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { struct fib6_info *iter_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); if (rt->fib6_table->tb6_id == iter_rt->fib6_table->tb6_id && rt->fib6_metric == iter_rt->fib6_metric && mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) return fib6_entry; } return NULL; } static void mlxsw_sp_fib6_entry_replace(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib6_entry *fib6_entry, bool replace) { struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; struct mlxsw_sp_fib6_entry *replaced; if (!replace) return; replaced = list_next_entry(fib6_entry, common.list); mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, replaced); mlxsw_sp_fib6_entry_destroy(mlxsw_sp, replaced); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); } static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp, struct fib6_info **rt_arr, unsigned int nrt6, bool replace) { struct mlxsw_sp_fib6_entry *fib6_entry; struct mlxsw_sp_fib_node *fib_node; struct fib6_info *rt = rt_arr[0]; int err; if (mlxsw_sp->router->aborted) return 0; if (rt->fib6_src.plen) return -EINVAL; if (mlxsw_sp_fib6_rt_should_ignore(rt)) return 0; fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, &rt->fib6_dst.addr, sizeof(rt->fib6_dst.addr), rt->fib6_dst.plen, MLXSW_SP_L3_PROTO_IPV6); if (IS_ERR(fib_node)) return PTR_ERR(fib_node); /* Before creating a new entry, try to append route to an existing * multipath entry. */ fib6_entry = mlxsw_sp_fib6_node_mp_entry_find(fib_node, rt, replace); if (fib6_entry) { err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt_arr, nrt6); if (err) goto err_fib6_entry_nexthop_add; return 0; } fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr, nrt6); if (IS_ERR(fib6_entry)) { err = PTR_ERR(fib6_entry); goto err_fib6_entry_create; } err = mlxsw_sp_fib6_node_entry_link(mlxsw_sp, fib6_entry, &replace); if (err) goto err_fib6_node_entry_link; mlxsw_sp_fib6_entry_replace(mlxsw_sp, fib6_entry, replace); return 0; err_fib6_node_entry_link: mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); err_fib6_entry_create: err_fib6_entry_nexthop_add: mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); return err; } static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, struct fib6_info **rt_arr, unsigned int nrt6) { struct mlxsw_sp_fib6_entry *fib6_entry; struct mlxsw_sp_fib_node *fib_node; struct fib6_info *rt = rt_arr[0]; if (mlxsw_sp->router->aborted) return; if (mlxsw_sp_fib6_rt_should_ignore(rt)) return; fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); if (WARN_ON(!fib6_entry)) return; /* If not all the nexthops are deleted, then only reduce the nexthop * group. */ if (nrt6 != fib6_entry->nrt6) { mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr, nrt6); return; } fib_node = fib6_entry->common.fib_node; mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); } static int __mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp, enum mlxsw_reg_ralxx_protocol proto, u8 tree_id) { char ralta_pl[MLXSW_REG_RALTA_LEN]; char ralst_pl[MLXSW_REG_RALST_LEN]; int i, err; mlxsw_reg_ralta_pack(ralta_pl, true, proto, tree_id); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); if (err) return err; mlxsw_reg_ralst_pack(ralst_pl, 0xff, tree_id); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); if (err) return err; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; char raltb_pl[MLXSW_REG_RALTB_LEN]; char ralue_pl[MLXSW_REG_RALUE_LEN]; mlxsw_reg_raltb_pack(raltb_pl, vr->id, proto, tree_id); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); if (err) return err; mlxsw_reg_ralue_pack(ralue_pl, proto, MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0); mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); if (err) return err; } return 0; } static struct mlxsw_sp_mr_table * mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family) { if (family == RTNL_FAMILY_IPMR) return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]; else return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; } static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, struct mfc_entry_notifier_info *men_info, bool replace) { struct mlxsw_sp_mr_table *mrt; struct mlxsw_sp_vr *vr; if (mlxsw_sp->router->aborted) return 0; vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); if (IS_ERR(vr)) return PTR_ERR(vr); mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace); } static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, struct mfc_entry_notifier_info *men_info) { struct mlxsw_sp_mr_table *mrt; struct mlxsw_sp_vr *vr; if (mlxsw_sp->router->aborted) return; vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); if (WARN_ON(!vr)) return; mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); mlxsw_sp_mr_route_del(mrt, men_info->mfc); mlxsw_sp_vr_put(mlxsw_sp, vr); } static int mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, struct vif_entry_notifier_info *ven_info) { struct mlxsw_sp_mr_table *mrt; struct mlxsw_sp_rif *rif; struct mlxsw_sp_vr *vr; if (mlxsw_sp->router->aborted) return 0; vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); if (IS_ERR(vr)) return PTR_ERR(vr); mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); return mlxsw_sp_mr_vif_add(mrt, ven_info->dev, ven_info->vif_index, ven_info->vif_flags, rif); } static void mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, struct vif_entry_notifier_info *ven_info) { struct mlxsw_sp_mr_table *mrt; struct mlxsw_sp_vr *vr; if (mlxsw_sp->router->aborted) return; vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); if (WARN_ON(!vr)) return; mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index); mlxsw_sp_vr_put(mlxsw_sp, vr); } static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp) { enum mlxsw_reg_ralxx_protocol proto = MLXSW_REG_RALXX_PROTOCOL_IPV4; int err; err = __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, MLXSW_SP_LPM_TREE_MIN); if (err) return err; /* The multicast router code does not need an abort trap as by default, * packets that don't match any routes are trapped to the CPU. */ proto = MLXSW_REG_RALXX_PROTOCOL_IPV6; return __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, MLXSW_SP_LPM_TREE_MIN + 1); } static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_node *fib_node) { struct mlxsw_sp_fib4_entry *fib4_entry, *tmp; list_for_each_entry_safe(fib4_entry, tmp, &fib_node->entry_list, common.list) { bool do_break = &tmp->common.list == &fib_node->entry_list; mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); /* Break when entry list is empty and node was freed. * Otherwise, we'll access freed memory in the next * iteration. */ if (do_break) break; } } static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_node *fib_node) { struct mlxsw_sp_fib6_entry *fib6_entry, *tmp; list_for_each_entry_safe(fib6_entry, tmp, &fib_node->entry_list, common.list) { bool do_break = &tmp->common.list == &fib_node->entry_list; mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); if (do_break) break; } } static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib_node *fib_node) { switch (fib_node->fib->proto) { case MLXSW_SP_L3_PROTO_IPV4: mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); break; case MLXSW_SP_L3_PROTO_IPV6: mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); break; } } static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, enum mlxsw_sp_l3proto proto) { struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); struct mlxsw_sp_fib_node *fib_node, *tmp; list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { bool do_break = &tmp->list == &fib->node_list; mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); if (do_break) break; } } static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) { int i, j; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; if (!mlxsw_sp_vr_is_used(vr)) continue; for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++) mlxsw_sp_mr_table_flush(vr->mr_table[j]); mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); /* If virtual router was only used for IPv4, then it's no * longer used. */ if (!mlxsw_sp_vr_is_used(vr)) continue; mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); } } static void mlxsw_sp_router_fib_abort(struct mlxsw_sp *mlxsw_sp) { int err; if (mlxsw_sp->router->aborted) return; dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n"); mlxsw_sp_router_fib_flush(mlxsw_sp); mlxsw_sp->router->aborted = true; err = mlxsw_sp_router_set_abort_trap(mlxsw_sp); if (err) dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n"); } struct mlxsw_sp_fib6_event_work { struct fib6_info **rt_arr; unsigned int nrt6; }; struct mlxsw_sp_fib_event_work { struct work_struct work; union { struct mlxsw_sp_fib6_event_work fib6_work; struct fib_entry_notifier_info fen_info; struct fib_rule_notifier_info fr_info; struct fib_nh_notifier_info fnh_info; struct mfc_entry_notifier_info men_info; struct vif_entry_notifier_info ven_info; }; struct mlxsw_sp *mlxsw_sp; unsigned long event; }; static int mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work, struct fib6_entry_notifier_info *fen6_info) { struct fib6_info *rt = fen6_info->rt; struct fib6_info **rt_arr; struct fib6_info *iter; unsigned int nrt6; int i = 0; nrt6 = fen6_info->nsiblings + 1; rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC); if (!rt_arr) return -ENOMEM; fib6_work->rt_arr = rt_arr; fib6_work->nrt6 = nrt6; rt_arr[0] = rt; fib6_info_hold(rt); if (!fen6_info->nsiblings) return 0; list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { if (i == fen6_info->nsiblings) break; rt_arr[i + 1] = iter; fib6_info_hold(iter); i++; } WARN_ON_ONCE(i != fen6_info->nsiblings); return 0; } static void mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work) { int i; for (i = 0; i < fib6_work->nrt6; i++) mlxsw_sp_rt6_release(fib6_work->rt_arr[i]); kfree(fib6_work->rt_arr); } static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) { struct mlxsw_sp_fib_event_work *fib_work = container_of(work, struct mlxsw_sp_fib_event_work, work); struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; bool replace, append; int err; /* Protect internal structures from changes */ rtnl_lock(); mlxsw_sp_span_respin(mlxsw_sp); switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_APPEND: /* fall through */ case FIB_EVENT_ENTRY_ADD: replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; append = fib_work->event == FIB_EVENT_ENTRY_APPEND; err = mlxsw_sp_router_fib4_add(mlxsw_sp, &fib_work->fen_info, replace, append); if (err) mlxsw_sp_router_fib_abort(mlxsw_sp); fib_info_put(fib_work->fen_info.fi); break; case FIB_EVENT_ENTRY_DEL: mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); fib_info_put(fib_work->fen_info.fi); break; case FIB_EVENT_RULE_ADD: /* if we get here, a rule was added that we do not support. * just do the fib_abort */ mlxsw_sp_router_fib_abort(mlxsw_sp); break; case FIB_EVENT_NH_ADD: /* fall through */ case FIB_EVENT_NH_DEL: mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, fib_work->fnh_info.fib_nh); fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); break; } rtnl_unlock(); kfree(fib_work); } static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) { struct mlxsw_sp_fib_event_work *fib_work = container_of(work, struct mlxsw_sp_fib_event_work, work); struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; bool replace; int err; rtnl_lock(); mlxsw_sp_span_respin(mlxsw_sp); switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_ADD: replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; err = mlxsw_sp_router_fib6_add(mlxsw_sp, fib_work->fib6_work.rt_arr, fib_work->fib6_work.nrt6, replace); if (err) mlxsw_sp_router_fib_abort(mlxsw_sp); mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); break; case FIB_EVENT_ENTRY_DEL: mlxsw_sp_router_fib6_del(mlxsw_sp, fib_work->fib6_work.rt_arr, fib_work->fib6_work.nrt6); mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); break; case FIB_EVENT_RULE_ADD: /* if we get here, a rule was added that we do not support. * just do the fib_abort */ mlxsw_sp_router_fib_abort(mlxsw_sp); break; } rtnl_unlock(); kfree(fib_work); } static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) { struct mlxsw_sp_fib_event_work *fib_work = container_of(work, struct mlxsw_sp_fib_event_work, work); struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; bool replace; int err; rtnl_lock(); switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_ADD: replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, replace); if (err) mlxsw_sp_router_fib_abort(mlxsw_sp); mr_cache_put(fib_work->men_info.mfc); break; case FIB_EVENT_ENTRY_DEL: mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); mr_cache_put(fib_work->men_info.mfc); break; case FIB_EVENT_VIF_ADD: err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, &fib_work->ven_info); if (err) mlxsw_sp_router_fib_abort(mlxsw_sp); dev_put(fib_work->ven_info.dev); break; case FIB_EVENT_VIF_DEL: mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, &fib_work->ven_info); dev_put(fib_work->ven_info.dev); break; case FIB_EVENT_RULE_ADD: /* if we get here, a rule was added that we do not support. * just do the fib_abort */ mlxsw_sp_router_fib_abort(mlxsw_sp); break; } rtnl_unlock(); kfree(fib_work); } static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, struct fib_notifier_info *info) { struct fib_entry_notifier_info *fen_info; struct fib_nh_notifier_info *fnh_info; switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_APPEND: /* fall through */ case FIB_EVENT_ENTRY_ADD: /* fall through */ case FIB_EVENT_ENTRY_DEL: fen_info = container_of(info, struct fib_entry_notifier_info, info); fib_work->fen_info = *fen_info; /* Take reference on fib_info to prevent it from being * freed while work is queued. Release it afterwards. */ fib_info_hold(fib_work->fen_info.fi); break; case FIB_EVENT_NH_ADD: /* fall through */ case FIB_EVENT_NH_DEL: fnh_info = container_of(info, struct fib_nh_notifier_info, info); fib_work->fnh_info = *fnh_info; fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); break; } } static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, struct fib_notifier_info *info) { struct fib6_entry_notifier_info *fen6_info; int err; switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_ADD: /* fall through */ case FIB_EVENT_ENTRY_DEL: fen6_info = container_of(info, struct fib6_entry_notifier_info, info); err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work, fen6_info); if (err) return err; break; } return 0; } static void mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, struct fib_notifier_info *info) { switch (fib_work->event) { case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_ADD: /* fall through */ case FIB_EVENT_ENTRY_DEL: memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); mr_cache_hold(fib_work->men_info.mfc); break; case FIB_EVENT_VIF_ADD: /* fall through */ case FIB_EVENT_VIF_DEL: memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); dev_hold(fib_work->ven_info.dev); break; } } static int mlxsw_sp_router_fib_rule_event(unsigned long event, struct fib_notifier_info *info, struct mlxsw_sp *mlxsw_sp) { struct netlink_ext_ack *extack = info->extack; struct fib_rule_notifier_info *fr_info; struct fib_rule *rule; int err = 0; /* nothing to do at the moment */ if (event == FIB_EVENT_RULE_DEL) return 0; if (mlxsw_sp->router->aborted) return 0; fr_info = container_of(info, struct fib_rule_notifier_info, info); rule = fr_info->rule; /* Rule only affects locally generated traffic */ if (rule->iifindex == info->net->loopback_dev->ifindex) return 0; switch (info->family) { case AF_INET: if (!fib4_rule_default(rule) && !rule->l3mdev) err = -EOPNOTSUPP; break; case AF_INET6: if (!fib6_rule_default(rule) && !rule->l3mdev) err = -EOPNOTSUPP; break; case RTNL_FAMILY_IPMR: if (!ipmr_rule_default(rule) && !rule->l3mdev) err = -EOPNOTSUPP; break; case RTNL_FAMILY_IP6MR: if (!ip6mr_rule_default(rule) && !rule->l3mdev) err = -EOPNOTSUPP; break; } if (err < 0) NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported"); return err; } /* Called with rcu_read_lock() */ static int mlxsw_sp_router_fib_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct mlxsw_sp_fib_event_work *fib_work; struct fib_notifier_info *info = ptr; struct mlxsw_sp_router *router; int err; if (!net_eq(info->net, &init_net) || (info->family != AF_INET && info->family != AF_INET6 && info->family != RTNL_FAMILY_IPMR && info->family != RTNL_FAMILY_IP6MR)) return NOTIFY_DONE; router = container_of(nb, struct mlxsw_sp_router, fib_nb); switch (event) { case FIB_EVENT_RULE_ADD: /* fall through */ case FIB_EVENT_RULE_DEL: err = mlxsw_sp_router_fib_rule_event(event, info, router->mlxsw_sp); if (!err || info->extack) return notifier_from_errno(err); break; case FIB_EVENT_ENTRY_ADD: case FIB_EVENT_ENTRY_REPLACE: /* fall through */ case FIB_EVENT_ENTRY_APPEND: /* fall through */ if (router->aborted) { NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route"); return notifier_from_errno(-EINVAL); } if (info->family == AF_INET) { struct fib_entry_notifier_info *fen_info = ptr; if (fen_info->fi->fib_nh_is_v6) { NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); return notifier_from_errno(-EINVAL); } if (fen_info->fi->nh) { NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); return notifier_from_errno(-EINVAL); } } else if (info->family == AF_INET6) { struct fib6_entry_notifier_info *fen6_info; fen6_info = container_of(info, struct fib6_entry_notifier_info, info); if (fen6_info->rt->nh) { NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported"); return notifier_from_errno(-EINVAL); } } break; } fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); if (WARN_ON(!fib_work)) return NOTIFY_BAD; fib_work->mlxsw_sp = router->mlxsw_sp; fib_work->event = event; switch (info->family) { case AF_INET: INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); mlxsw_sp_router_fib4_event(fib_work, info); break; case AF_INET6: INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); err = mlxsw_sp_router_fib6_event(fib_work, info); if (err) goto err_fib_event; break; case RTNL_FAMILY_IP6MR: case RTNL_FAMILY_IPMR: INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); mlxsw_sp_router_fibmr_event(fib_work, info); break; } mlxsw_core_schedule_work(&fib_work->work); return NOTIFY_DONE; err_fib_event: kfree(fib_work); return NOTIFY_BAD; } struct mlxsw_sp_rif * mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) { int i; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) if (mlxsw_sp->router->rifs[i] && mlxsw_sp->router->rifs[i]->dev == dev) return mlxsw_sp->router->rifs[i]; return NULL; } static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) { char ritr_pl[MLXSW_REG_RITR_LEN]; int err; mlxsw_reg_ritr_rif_pack(ritr_pl, rif); err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); if (err) return err; mlxsw_reg_ritr_enable_set(ritr_pl, false); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif) { mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); } static bool mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, unsigned long event) { struct inet6_dev *inet6_dev; bool addr_list_empty = true; struct in_device *idev; switch (event) { case NETDEV_UP: return rif == NULL; case NETDEV_DOWN: idev = __in_dev_get_rtnl(dev); if (idev && idev->ifa_list) addr_list_empty = false; inet6_dev = __in6_dev_get(dev); if (addr_list_empty && inet6_dev && !list_empty(&inet6_dev->addr_list)) addr_list_empty = false; /* macvlans do not have a RIF, but rather piggy back on the * RIF of their lower device. */ if (netif_is_macvlan(dev) && addr_list_empty) return true; if (rif && addr_list_empty && !netif_is_l3_slave(rif->dev)) return true; /* It is possible we already removed the RIF ourselves * if it was assigned to a netdev that is now a bridge * or LAG slave. */ return false; } return false; } static enum mlxsw_sp_rif_type mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) { enum mlxsw_sp_fid_type type; if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) return MLXSW_SP_RIF_TYPE_IPIP_LB; /* Otherwise RIF type is derived from the type of the underlying FID. */ if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) type = MLXSW_SP_FID_TYPE_8021Q; else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) type = MLXSW_SP_FID_TYPE_8021Q; else if (netif_is_bridge_master(dev)) type = MLXSW_SP_FID_TYPE_8021D; else type = MLXSW_SP_FID_TYPE_RFID; return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); } static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index) { int i; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { if (!mlxsw_sp->router->rifs[i]) { *p_rif_index = i; return 0; } } return -ENOBUFS; } static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, u16 vr_id, struct net_device *l3_dev) { struct mlxsw_sp_rif *rif; rif = kzalloc(rif_size, GFP_KERNEL); if (!rif) return NULL; INIT_LIST_HEAD(&rif->nexthop_list); INIT_LIST_HEAD(&rif->neigh_list); if (l3_dev) { ether_addr_copy(rif->addr, l3_dev->dev_addr); rif->mtu = l3_dev->mtu; rif->dev = l3_dev; } rif->vr_id = vr_id; rif->rif_index = rif_index; return rif; } struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, u16 rif_index) { return mlxsw_sp->router->rifs[rif_index]; } u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) { return rif->rif_index; } u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) { return lb_rif->common.rif_index; } u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) { u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev); struct mlxsw_sp_vr *ul_vr; ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL); if (WARN_ON(IS_ERR(ul_vr))) return 0; return ul_vr->id; } u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) { return lb_rif->ul_rif_id; } int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) { return rif->dev->ifindex; } const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) { return rif->dev; } struct mlxsw_sp_fid *mlxsw_sp_rif_fid(const struct mlxsw_sp_rif *rif) { return rif->fid; } 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) { u32 tb_id = l3mdev_fib_table(params->dev); const struct mlxsw_sp_rif_ops *ops; struct mlxsw_sp_fid *fid = NULL; enum mlxsw_sp_rif_type type; struct mlxsw_sp_rif *rif; struct mlxsw_sp_vr *vr; u16 rif_index; int i, err; type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); ops = mlxsw_sp->rif_ops_arr[type]; vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); if (IS_ERR(vr)) return ERR_CAST(vr); vr->rif_count++; err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); if (err) { NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); goto err_rif_index_alloc; } rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); if (!rif) { err = -ENOMEM; goto err_rif_alloc; } dev_hold(rif->dev); mlxsw_sp->router->rifs[rif_index] = rif; rif->mlxsw_sp = mlxsw_sp; rif->ops = ops; if (ops->fid_get) { fid = ops->fid_get(rif, extack); if (IS_ERR(fid)) { err = PTR_ERR(fid); goto err_fid_get; } rif->fid = fid; } if (ops->setup) ops->setup(rif, params); err = ops->configure(rif); if (err) goto err_configure; for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) { err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif); if (err) goto err_mr_rif_add; } mlxsw_sp_rif_counters_alloc(rif); return rif; err_mr_rif_add: for (i--; i >= 0; i--) mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); ops->deconfigure(rif); err_configure: if (fid) mlxsw_sp_fid_put(fid); err_fid_get: mlxsw_sp->router->rifs[rif_index] = NULL; dev_put(rif->dev); kfree(rif); err_rif_alloc: err_rif_index_alloc: vr->rif_count--; mlxsw_sp_vr_put(mlxsw_sp, vr); return ERR_PTR(err); } static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) { const struct mlxsw_sp_rif_ops *ops = rif->ops; struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_fid *fid = rif->fid; struct mlxsw_sp_vr *vr; int i; mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); vr = &mlxsw_sp->router->vrs[rif->vr_id]; mlxsw_sp_rif_counters_free(rif); for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); ops->deconfigure(rif); if (fid) /* Loopback RIFs are not associated with a FID. */ mlxsw_sp_fid_put(fid); mlxsw_sp->router->rifs[rif->rif_index] = NULL; dev_put(rif->dev); kfree(rif); vr->rif_count--; mlxsw_sp_vr_put(mlxsw_sp, vr); } void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, struct net_device *dev) { struct mlxsw_sp_rif *rif; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); if (!rif) return; mlxsw_sp_rif_destroy(rif); } static void mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) { struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; params->vid = mlxsw_sp_port_vlan->vid; params->lag = mlxsw_sp_port->lagged; if (params->lag) params->lag_id = mlxsw_sp_port->lag_id; else params->system_port = mlxsw_sp_port->local_port; } static struct mlxsw_sp_rif_subport * mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) { return container_of(rif, struct mlxsw_sp_rif_subport, common); } static struct mlxsw_sp_rif * mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp, const struct mlxsw_sp_rif_params *params, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif_subport *rif_subport; struct mlxsw_sp_rif *rif; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev); if (!rif) return mlxsw_sp_rif_create(mlxsw_sp, params, extack); rif_subport = mlxsw_sp_rif_subport_rif(rif); refcount_inc(&rif_subport->ref_count); return rif; } static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_rif_subport *rif_subport; rif_subport = mlxsw_sp_rif_subport_rif(rif); if (!refcount_dec_and_test(&rif_subport->ref_count)) return; mlxsw_sp_rif_destroy(rif); } static int mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, struct net_device *l3_dev, struct netlink_ext_ack *extack) { struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; struct mlxsw_sp_rif_params params = { .dev = l3_dev, }; u16 vid = mlxsw_sp_port_vlan->vid; struct mlxsw_sp_rif *rif; struct mlxsw_sp_fid *fid; int err; mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack); if (IS_ERR(rif)) return PTR_ERR(rif); /* FID was already created, just take a reference */ fid = rif->ops->fid_get(rif, extack); err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); if (err) goto err_fid_port_vid_map; err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); if (err) goto err_port_vid_learning_set; err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_FORWARDING); if (err) goto err_port_vid_stp_set; mlxsw_sp_port_vlan->fid = fid; return 0; err_port_vid_stp_set: mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); err_port_vid_learning_set: mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); err_fid_port_vid_map: mlxsw_sp_fid_put(fid); mlxsw_sp_rif_subport_put(rif); return err; } void mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) { struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid); u16 vid = mlxsw_sp_port_vlan->vid; if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) return; mlxsw_sp_port_vlan->fid = NULL; mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); mlxsw_sp_fid_put(fid); mlxsw_sp_rif_subport_put(rif); } static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, struct net_device *port_dev, unsigned long event, u16 vid, struct netlink_ext_ack *extack) { struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); if (WARN_ON(!mlxsw_sp_port_vlan)) return -EINVAL; switch (event) { case NETDEV_UP: return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, l3_dev, extack); case NETDEV_DOWN: mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); break; } return 0; } static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, unsigned long event, struct netlink_ext_ack *extack) { if (netif_is_bridge_port(port_dev) || netif_is_lag_port(port_dev) || netif_is_ovs_port(port_dev)) return 0; return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, MLXSW_SP_DEFAULT_VID, extack); } static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, struct net_device *lag_dev, unsigned long event, u16 vid, struct netlink_ext_ack *extack) { struct net_device *port_dev; struct list_head *iter; int err; netdev_for_each_lower_dev(lag_dev, port_dev, iter) { if (mlxsw_sp_port_dev_check(port_dev)) { err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, port_dev, event, vid, extack); if (err) return err; } } return 0; } static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, unsigned long event, struct netlink_ext_ack *extack) { if (netif_is_bridge_port(lag_dev)) return 0; return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, MLXSW_SP_DEFAULT_VID, extack); } static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, struct net_device *l3_dev, unsigned long event, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif_params params = { .dev = l3_dev, }; struct mlxsw_sp_rif *rif; switch (event) { case NETDEV_UP: rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); if (IS_ERR(rif)) return PTR_ERR(rif); break; case NETDEV_DOWN: rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); mlxsw_sp_rif_destroy(rif); break; } return 0; } static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp, struct net_device *vlan_dev, unsigned long event, struct netlink_ext_ack *extack) { struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); u16 vid = vlan_dev_vlan_id(vlan_dev); if (netif_is_bridge_port(vlan_dev)) return 0; if (mlxsw_sp_port_dev_check(real_dev)) return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, event, vid, extack); else if (netif_is_lag_master(real_dev)) return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, vid, extack); else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event, extack); return 0; } static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac) { u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 }; u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; return ether_addr_equal_masked(mac, vrrp4, mask); } static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac) { u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 }; u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; return ether_addr_equal_masked(mac, vrrp6, mask); } static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index, const u8 *mac, bool adding) { char ritr_pl[MLXSW_REG_RITR_LEN]; u8 vrrp_id = adding ? mac[5] : 0; int err; if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) && !mlxsw_sp_rif_macvlan_is_vrrp6(mac)) return 0; 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; if (mlxsw_sp_rif_macvlan_is_vrrp4(mac)) mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id); else mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp, const struct net_device *macvlan_dev, struct netlink_ext_ack *extack) { struct macvlan_dev *vlan = netdev_priv(macvlan_dev); struct mlxsw_sp_rif *rif; int err; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); if (!rif) { NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces"); return -EOPNOTSUPP; } err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, mlxsw_sp_fid_index(rif->fid), true); if (err) return err; err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, true); if (err) goto err_rif_vrrp_add; /* Make sure the bridge driver does not have this MAC pointing at * some other port. */ if (rif->ops->fdb_del) rif->ops->fdb_del(rif, macvlan_dev->dev_addr); return 0; err_rif_vrrp_add: mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, mlxsw_sp_fid_index(rif->fid), false); return err; } void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, const struct net_device *macvlan_dev) { struct macvlan_dev *vlan = netdev_priv(macvlan_dev); struct mlxsw_sp_rif *rif; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); /* If we do not have a RIF, then we already took care of * removing the macvlan's MAC during RIF deletion. */ if (!rif) return; mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, false); mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, mlxsw_sp_fid_index(rif->fid), false); } static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp, struct net_device *macvlan_dev, unsigned long event, struct netlink_ext_ack *extack) { switch (event) { case NETDEV_UP: return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack); case NETDEV_DOWN: mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); break; } return 0; } static int mlxsw_sp_router_port_check_rif_addr(struct mlxsw_sp *mlxsw_sp, struct net_device *dev, const unsigned char *dev_addr, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif *rif; int i; /* A RIF is not created for macvlan netdevs. Their MAC is used to * populate the FDB */ if (netif_is_macvlan(dev) || netif_is_l3_master(dev)) return 0; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { rif = mlxsw_sp->router->rifs[i]; if (rif && rif->dev && rif->dev != dev && !ether_addr_equal_masked(rif->dev->dev_addr, dev_addr, mlxsw_sp->mac_mask)) { NL_SET_ERR_MSG_MOD(extack, "All router interface MAC addresses must have the same prefix"); return -EINVAL; } } return 0; } static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp, struct net_device *dev, unsigned long event, struct netlink_ext_ack *extack) { if (mlxsw_sp_port_dev_check(dev)) return mlxsw_sp_inetaddr_port_event(dev, event, extack); else if (netif_is_lag_master(dev)) return mlxsw_sp_inetaddr_lag_event(dev, event, extack); else if (netif_is_bridge_master(dev)) return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event, extack); else if (is_vlan_dev(dev)) return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event, extack); else if (netif_is_macvlan(dev)) return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event, extack); else return 0; } static int mlxsw_sp_inetaddr_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; struct net_device *dev = ifa->ifa_dev->dev; struct mlxsw_sp_router *router; struct mlxsw_sp_rif *rif; int err = 0; /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ if (event == NETDEV_UP) goto out; router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb); rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev); if (!mlxsw_sp_rif_should_config(rif, dev, event)) goto out; err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL); out: return notifier_from_errno(err); } int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, unsigned long event, void *ptr) { struct in_validator_info *ivi = (struct in_validator_info *) ptr; struct net_device *dev = ivi->ivi_dev->dev; struct mlxsw_sp *mlxsw_sp; struct mlxsw_sp_rif *rif; int err = 0; mlxsw_sp = mlxsw_sp_lower_get(dev); if (!mlxsw_sp) goto out; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); if (!mlxsw_sp_rif_should_config(rif, dev, event)) goto out; err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, ivi->extack); if (err) goto out; err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack); out: return notifier_from_errno(err); } struct mlxsw_sp_inet6addr_event_work { struct work_struct work; struct mlxsw_sp *mlxsw_sp; struct net_device *dev; unsigned long event; }; static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) { struct mlxsw_sp_inet6addr_event_work *inet6addr_work = container_of(work, struct mlxsw_sp_inet6addr_event_work, work); struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp; struct net_device *dev = inet6addr_work->dev; unsigned long event = inet6addr_work->event; struct mlxsw_sp_rif *rif; rtnl_lock(); rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); if (!mlxsw_sp_rif_should_config(rif, dev, event)) goto out; __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL); out: rtnl_unlock(); dev_put(dev); kfree(inet6addr_work); } /* Called with rcu_read_lock() */ static int mlxsw_sp_inet6addr_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; struct mlxsw_sp_inet6addr_event_work *inet6addr_work; struct net_device *dev = if6->idev->dev; struct mlxsw_sp_router *router; /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ if (event == NETDEV_UP) return NOTIFY_DONE; inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); if (!inet6addr_work) return NOTIFY_BAD; router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb); INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); inet6addr_work->mlxsw_sp = router->mlxsw_sp; inet6addr_work->dev = dev; inet6addr_work->event = event; dev_hold(dev); mlxsw_core_schedule_work(&inet6addr_work->work); return NOTIFY_DONE; } int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, unsigned long event, void *ptr) { struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; struct net_device *dev = i6vi->i6vi_dev->dev; struct mlxsw_sp *mlxsw_sp; struct mlxsw_sp_rif *rif; int err = 0; mlxsw_sp = mlxsw_sp_lower_get(dev); if (!mlxsw_sp) goto out; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); if (!mlxsw_sp_rif_should_config(rif, dev, event)) goto out; err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, i6vi->extack); if (err) goto out; err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack); out: return notifier_from_errno(err); } static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, const char *mac, int mtu) { char ritr_pl[MLXSW_REG_RITR_LEN]; int err; 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_mtu_set(ritr_pl, mtu); mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static int mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_rif *rif) { struct net_device *dev = rif->dev; u16 fid_index; int err; fid_index = mlxsw_sp_fid_index(rif->fid); err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); if (err) return err; err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, dev->mtu); if (err) goto err_rif_edit; err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); if (err) goto err_rif_fdb_op; if (rif->mtu != dev->mtu) { struct mlxsw_sp_vr *vr; int i; /* The RIF is relevant only to its mr_table instance, as unlike * unicast routing, in multicast routing a RIF cannot be shared * between several multicast routing tables. */ vr = &mlxsw_sp->router->vrs[rif->vr_id]; for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i], rif, dev->mtu); } ether_addr_copy(rif->addr, dev->dev_addr); rif->mtu = dev->mtu; netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); return 0; err_rif_fdb_op: mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu); err_rif_edit: mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); return err; } static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif, struct netdev_notifier_pre_changeaddr_info *info) { struct netlink_ext_ack *extack; extack = netdev_notifier_info_to_extack(&info->info); return mlxsw_sp_router_port_check_rif_addr(rif->mlxsw_sp, rif->dev, info->dev_addr, extack); } int mlxsw_sp_netdevice_router_port_event(struct net_device *dev, unsigned long event, void *ptr) { struct mlxsw_sp *mlxsw_sp; struct mlxsw_sp_rif *rif; mlxsw_sp = mlxsw_sp_lower_get(dev); if (!mlxsw_sp) return 0; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); if (!rif) return 0; switch (event) { case NETDEV_CHANGEMTU: /* fall through */ case NETDEV_CHANGEADDR: return mlxsw_sp_router_port_change_event(mlxsw_sp, rif); case NETDEV_PRE_CHANGEADDR: return mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr); } return 0; } static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, struct net_device *l3_dev, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif *rif; /* If netdev is already associated with a RIF, then we need to * destroy it and create a new one with the new virtual router ID. */ rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); if (rif) __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, extack); return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack); } static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, struct net_device *l3_dev) { struct mlxsw_sp_rif *rif; rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); if (!rif) return; __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL); } int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, struct netdev_notifier_changeupper_info *info) { struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); int err = 0; /* We do not create a RIF for a macvlan, but only use it to * direct more MAC addresses to the router. */ if (!mlxsw_sp || netif_is_macvlan(l3_dev)) return 0; switch (event) { case NETDEV_PRECHANGEUPPER: return 0; case NETDEV_CHANGEUPPER: if (info->linking) { struct netlink_ext_ack *extack; extack = netdev_notifier_info_to_extack(&info->info); err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); } else { mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); } break; } return err; } static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev, void *data) { struct mlxsw_sp_rif *rif = data; if (!netif_is_macvlan(dev)) return 0; return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr, mlxsw_sp_fid_index(rif->fid), false); } static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif) { if (!netif_is_macvlan_port(rif->dev)) return 0; netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n"); return netdev_walk_all_upper_dev_rcu(rif->dev, __mlxsw_sp_rif_macvlan_flush, rif); } static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, const struct mlxsw_sp_rif_params *params) { struct mlxsw_sp_rif_subport *rif_subport; rif_subport = mlxsw_sp_rif_subport_rif(rif); refcount_set(&rif_subport->ref_count, 1); rif_subport->vid = params->vid; rif_subport->lag = params->lag; if (params->lag) rif_subport->lag_id = params->lag_id; else rif_subport->system_port = params->system_port; } static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_rif_subport *rif_subport; char ritr_pl[MLXSW_REG_RITR_LEN]; rif_subport = mlxsw_sp_rif_subport_rif(rif); mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, rif->rif_index, rif->vr_id, rif->dev->mtu); mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, rif_subport->lag ? rif_subport->lag_id : rif_subport->system_port, rif_subport->vid); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif) { int err; err = mlxsw_sp_rif_subport_op(rif, true); if (err) return err; err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(rif->fid), true); if (err) goto err_rif_fdb_op; mlxsw_sp_fid_rif_set(rif->fid, rif); return 0; err_rif_fdb_op: mlxsw_sp_rif_subport_op(rif, false); return err; } static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_fid *fid = rif->fid; mlxsw_sp_fid_rif_set(fid, NULL); mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(fid), false); mlxsw_sp_rif_macvlan_flush(rif); mlxsw_sp_rif_subport_op(rif, false); } static struct mlxsw_sp_fid * mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif, struct netlink_ext_ack *extack) { return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); } static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { .type = MLXSW_SP_RIF_TYPE_SUBPORT, .rif_size = sizeof(struct mlxsw_sp_rif_subport), .setup = mlxsw_sp_rif_subport_setup, .configure = mlxsw_sp_rif_subport_configure, .deconfigure = mlxsw_sp_rif_subport_deconfigure, .fid_get = mlxsw_sp_rif_subport_fid_get, }; static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif, enum mlxsw_reg_ritr_if_type type, u16 vid_fid, bool enable) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; char ritr_pl[MLXSW_REG_RITR_LEN]; mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, rif->dev->mtu); mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) { return mlxsw_core_max_ports(mlxsw_sp->core) + 1; } static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); int err; err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, true); if (err) return err; err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), true); if (err) goto err_fid_mc_flood_set; err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), true); if (err) goto err_fid_bc_flood_set; err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(rif->fid), true); if (err) goto err_rif_fdb_op; mlxsw_sp_fid_rif_set(rif->fid, rif); return 0; err_rif_fdb_op: mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), false); err_fid_bc_flood_set: mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), false); err_fid_mc_flood_set: mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); return err; } static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif) { u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_fid *fid = rif->fid; mlxsw_sp_fid_rif_set(fid, NULL); mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(fid), false); mlxsw_sp_rif_macvlan_flush(rif); mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), false); mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), false); mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); } static struct mlxsw_sp_fid * mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif, struct netlink_ext_ack *extack) { struct net_device *br_dev = rif->dev; u16 vid; int err; if (is_vlan_dev(rif->dev)) { vid = vlan_dev_vlan_id(rif->dev); br_dev = vlan_dev_real_dev(rif->dev); if (WARN_ON(!netif_is_bridge_master(br_dev))) return ERR_PTR(-EINVAL); } else { err = br_vlan_get_pvid(rif->dev, &vid); if (err < 0 || !vid) { NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID"); return ERR_PTR(-EINVAL); } } return mlxsw_sp_bridge_fid_get(rif->mlxsw_sp, br_dev, vid, extack); } static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) { u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); struct switchdev_notifier_fdb_info info; struct net_device *br_dev; struct net_device *dev; br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev; dev = br_fdb_find_port(br_dev, mac, vid); if (!dev) return; info.addr = mac; info.vid = vid; call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, NULL); } static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_ops = { .type = MLXSW_SP_RIF_TYPE_VLAN, .rif_size = sizeof(struct mlxsw_sp_rif), .configure = mlxsw_sp_rif_vlan_configure, .deconfigure = mlxsw_sp_rif_vlan_deconfigure, .fid_get = mlxsw_sp_rif_vlan_fid_get, .fdb_del = mlxsw_sp_rif_vlan_fdb_del, }; static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; u16 fid_index = mlxsw_sp_fid_index(rif->fid); int err; err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, true); if (err) return err; err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), true); if (err) goto err_fid_mc_flood_set; err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), true); if (err) goto err_fid_bc_flood_set; err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(rif->fid), true); if (err) goto err_rif_fdb_op; mlxsw_sp_fid_rif_set(rif->fid, rif); return 0; err_rif_fdb_op: mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), false); err_fid_bc_flood_set: mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), false); err_fid_mc_flood_set: mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); return err; } static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) { u16 fid_index = mlxsw_sp_fid_index(rif->fid); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_fid *fid = rif->fid; mlxsw_sp_fid_rif_set(fid, NULL); mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, mlxsw_sp_fid_index(fid), false); mlxsw_sp_rif_macvlan_flush(rif); mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, mlxsw_sp_router_port(mlxsw_sp), false); mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, mlxsw_sp_router_port(mlxsw_sp), false); mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); } static struct mlxsw_sp_fid * mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif, struct netlink_ext_ack *extack) { return mlxsw_sp_bridge_fid_get(rif->mlxsw_sp, rif->dev, 0, extack); } static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) { struct switchdev_notifier_fdb_info info; struct net_device *dev; dev = br_fdb_find_port(rif->dev, mac, 0); if (!dev) return; info.addr = mac; info.vid = 0; call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, NULL); } static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { .type = MLXSW_SP_RIF_TYPE_FID, .rif_size = sizeof(struct mlxsw_sp_rif), .configure = mlxsw_sp_rif_fid_configure, .deconfigure = mlxsw_sp_rif_fid_deconfigure, .fid_get = mlxsw_sp_rif_fid_fid_get, .fdb_del = mlxsw_sp_rif_fid_fdb_del, }; static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_emu_ops = { .type = MLXSW_SP_RIF_TYPE_VLAN, .rif_size = sizeof(struct mlxsw_sp_rif), .configure = mlxsw_sp_rif_fid_configure, .deconfigure = mlxsw_sp_rif_fid_deconfigure, .fid_get = mlxsw_sp_rif_vlan_fid_get, .fdb_del = mlxsw_sp_rif_vlan_fdb_del, }; static struct mlxsw_sp_rif_ipip_lb * mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) { return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); } static void mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, const struct mlxsw_sp_rif_params *params) { struct mlxsw_sp_rif_params_ipip_lb *params_lb; struct mlxsw_sp_rif_ipip_lb *rif_lb; params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, common); rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); rif_lb->lb_config = params_lb->lb_config; } static int mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_vr *ul_vr; int err; ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); if (IS_ERR(ul_vr)) return PTR_ERR(ul_vr); err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true); if (err) goto err_loopback_op; lb_rif->ul_vr_id = ul_vr->id; lb_rif->ul_rif_id = 0; ++ul_vr->rif_count; return 0; err_loopback_op: mlxsw_sp_vr_put(mlxsw_sp, ul_vr); return err; } static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_vr *ul_vr; ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false); --ul_vr->rif_count; mlxsw_sp_vr_put(mlxsw_sp, ul_vr); } static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = { .type = MLXSW_SP_RIF_TYPE_IPIP_LB, .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), .setup = mlxsw_sp_rif_ipip_lb_setup, .configure = mlxsw_sp1_rif_ipip_lb_configure, .deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure, }; const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = { [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops, }; static int mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable) { struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; char ritr_pl[MLXSW_REG_RITR_LEN]; mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU); mlxsw_reg_ritr_loopback_protocol_set(ritr_pl, MLXSW_REG_RITR_LOOPBACK_GENERIC); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); } static struct mlxsw_sp_rif * mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, struct netlink_ext_ack *extack) { struct mlxsw_sp_rif *ul_rif; u16 rif_index; int err; err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); if (err) { NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); return ERR_PTR(err); } ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL); if (!ul_rif) return ERR_PTR(-ENOMEM); mlxsw_sp->router->rifs[rif_index] = ul_rif; ul_rif->mlxsw_sp = mlxsw_sp; err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true); if (err) goto ul_rif_op_err; return ul_rif; ul_rif_op_err: mlxsw_sp->router->rifs[rif_index] = NULL; kfree(ul_rif); return ERR_PTR(err); } static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif) { struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false); mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL; kfree(ul_rif); } static struct mlxsw_sp_rif * mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, struct netlink_ext_ack *extack) { struct mlxsw_sp_vr *vr; int err; vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack); if (IS_ERR(vr)) return ERR_CAST(vr); if (refcount_inc_not_zero(&vr->ul_rif_refcnt)) return vr->ul_rif; vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack); if (IS_ERR(vr->ul_rif)) { err = PTR_ERR(vr->ul_rif); goto err_ul_rif_create; } vr->rif_count++; refcount_set(&vr->ul_rif_refcnt, 1); return vr->ul_rif; err_ul_rif_create: mlxsw_sp_vr_put(mlxsw_sp, vr); return ERR_PTR(err); } static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif) { struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; struct mlxsw_sp_vr *vr; vr = &mlxsw_sp->router->vrs[ul_rif->vr_id]; if (!refcount_dec_and_test(&vr->ul_rif_refcnt)) return; vr->rif_count--; mlxsw_sp_ul_rif_destroy(ul_rif); mlxsw_sp_vr_put(mlxsw_sp, vr); } int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, u16 *ul_rif_index) { struct mlxsw_sp_rif *ul_rif; ASSERT_RTNL(); ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); if (IS_ERR(ul_rif)) return PTR_ERR(ul_rif); *ul_rif_index = ul_rif->rif_index; return 0; } void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index) { struct mlxsw_sp_rif *ul_rif; ASSERT_RTNL(); ul_rif = mlxsw_sp->router->rifs[ul_rif_index]; if (WARN_ON(!ul_rif)) return; mlxsw_sp_ul_rif_put(ul_rif); } static int mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_rif *ul_rif; int err; ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); if (IS_ERR(ul_rif)) return PTR_ERR(ul_rif); err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true); if (err) goto err_loopback_op; lb_rif->ul_vr_id = 0; lb_rif->ul_rif_id = ul_rif->rif_index; return 0; err_loopback_op: mlxsw_sp_ul_rif_put(ul_rif); return err; } static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) { struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; struct mlxsw_sp_rif *ul_rif; ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id); mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false); mlxsw_sp_ul_rif_put(ul_rif); } static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = { .type = MLXSW_SP_RIF_TYPE_IPIP_LB, .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), .setup = mlxsw_sp_rif_ipip_lb_setup, .configure = mlxsw_sp2_rif_ipip_lb_configure, .deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure, }; const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = { [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops, }; static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) { u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); mlxsw_sp->router->rifs = kcalloc(max_rifs, sizeof(struct mlxsw_sp_rif *), GFP_KERNEL); if (!mlxsw_sp->router->rifs) return -ENOMEM; return 0; } static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) { int i; for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); kfree(mlxsw_sp->router->rifs); } static int mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) { char tigcr_pl[MLXSW_REG_TIGCR_LEN]; mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); } static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) { mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr; INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); } static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) { WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); } static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) { struct mlxsw_sp_router *router; /* Flush pending FIB notifications and then flush the device's * table before requesting another dump. The FIB notification * block is unregistered, so no need to take RTNL. */ mlxsw_core_flush_owq(); router = container_of(nb, struct mlxsw_sp_router, fib_nb); mlxsw_sp_router_fib_flush(router->mlxsw_sp); } #ifdef CONFIG_IP_ROUTE_MULTIPATH static void mlxsw_sp_mp_hash_header_set(char *recr2_pl, int header) { mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, header, true); } static void mlxsw_sp_mp_hash_field_set(char *recr2_pl, int field) { mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, field, true); } static void mlxsw_sp_mp4_hash_init(char *recr2_pl) { bool only_l3 = !init_net.ipv4.sysctl_fib_multipath_hash_policy; mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_NOT_TCP_NOT_UDP); mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_TCP_UDP); mlxsw_reg_recr2_ipv4_sip_enable(recr2_pl); mlxsw_reg_recr2_ipv4_dip_enable(recr2_pl); if (only_l3) return; mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV4); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV4_PROTOCOL); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); } static void mlxsw_sp_mp6_hash_init(char *recr2_pl) { bool only_l3 = !ip6_multipath_hash_policy(&init_net); mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_NOT_TCP_NOT_UDP); mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_TCP_UDP); mlxsw_reg_recr2_ipv6_sip_enable(recr2_pl); mlxsw_reg_recr2_ipv6_dip_enable(recr2_pl); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_NEXT_HEADER); if (only_l3) { mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_FLOW_LABEL); } else { mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV6); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); } } static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) { char recr2_pl[MLXSW_REG_RECR2_LEN]; u32 seed; seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); mlxsw_reg_recr2_pack(recr2_pl, seed); mlxsw_sp_mp4_hash_init(recr2_pl); mlxsw_sp_mp6_hash_init(recr2_pl); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); } #else static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) { return 0; } #endif static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp) { char rdpm_pl[MLXSW_REG_RDPM_LEN]; unsigned int i; MLXSW_REG_ZERO(rdpm, rdpm_pl); /* HW is determining switch priority based on DSCP-bits, but the * kernel is still doing that based on the ToS. Since there's a * mismatch in bits we need to make sure to translate the right * value ToS would observe, skipping the 2 least-significant ECN bits. */ for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++) mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2)); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl); } static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) { bool usp = init_net.ipv4.sysctl_ip_fwd_update_priority; char rgcr_pl[MLXSW_REG_RGCR_LEN]; u64 max_rifs; int err; if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) return -EIO; max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); mlxsw_reg_rgcr_pack(rgcr_pl, true, true); mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); mlxsw_reg_rgcr_usp_set(rgcr_pl, usp); err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); if (err) return err; return 0; } static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) { char rgcr_pl[MLXSW_REG_RGCR_LEN]; mlxsw_reg_rgcr_pack(rgcr_pl, false, false); mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); } int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) { struct mlxsw_sp_router *router; int err; router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); if (!router) return -ENOMEM; mlxsw_sp->router = router; router->mlxsw_sp = mlxsw_sp; router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event; err = register_inetaddr_notifier(&router->inetaddr_nb); if (err) goto err_register_inetaddr_notifier; router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event; err = register_inet6addr_notifier(&router->inet6addr_nb); if (err) goto err_register_inet6addr_notifier; INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); err = __mlxsw_sp_router_init(mlxsw_sp); if (err) goto err_router_init; err = mlxsw_sp_rifs_init(mlxsw_sp); if (err) goto err_rifs_init; err = mlxsw_sp_ipips_init(mlxsw_sp); if (err) goto err_ipips_init; err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, &mlxsw_sp_nexthop_ht_params); if (err) goto err_nexthop_ht_init; err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, &mlxsw_sp_nexthop_group_ht_params); if (err) goto err_nexthop_group_ht_init; INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); err = mlxsw_sp_lpm_init(mlxsw_sp); if (err) goto err_lpm_init; err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); if (err) goto err_mr_init; err = mlxsw_sp_vrs_init(mlxsw_sp); if (err) goto err_vrs_init; err = mlxsw_sp_neigh_init(mlxsw_sp); if (err) goto err_neigh_init; mlxsw_sp->router->netevent_nb.notifier_call = mlxsw_sp_router_netevent_event; err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); if (err) goto err_register_netevent_notifier; err = mlxsw_sp_mp_hash_init(mlxsw_sp); if (err) goto err_mp_hash_init; err = mlxsw_sp_dscp_init(mlxsw_sp); if (err) goto err_dscp_init; mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; err = register_fib_notifier(&mlxsw_sp->router->fib_nb, mlxsw_sp_router_fib_dump_flush); if (err) goto err_register_fib_notifier; return 0; err_register_fib_notifier: err_dscp_init: err_mp_hash_init: unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); err_register_netevent_notifier: mlxsw_sp_neigh_fini(mlxsw_sp); err_neigh_init: mlxsw_sp_vrs_fini(mlxsw_sp); err_vrs_init: mlxsw_sp_mr_fini(mlxsw_sp); err_mr_init: mlxsw_sp_lpm_fini(mlxsw_sp); err_lpm_init: rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); err_nexthop_group_ht_init: rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); err_nexthop_ht_init: mlxsw_sp_ipips_fini(mlxsw_sp); err_ipips_init: mlxsw_sp_rifs_fini(mlxsw_sp); err_rifs_init: __mlxsw_sp_router_fini(mlxsw_sp); err_router_init: unregister_inet6addr_notifier(&router->inet6addr_nb); err_register_inet6addr_notifier: unregister_inetaddr_notifier(&router->inetaddr_nb); err_register_inetaddr_notifier: kfree(mlxsw_sp->router); return err; } void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) { unregister_fib_notifier(&mlxsw_sp->router->fib_nb); unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); mlxsw_sp_neigh_fini(mlxsw_sp); mlxsw_sp_vrs_fini(mlxsw_sp); mlxsw_sp_mr_fini(mlxsw_sp); mlxsw_sp_lpm_fini(mlxsw_sp); rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); mlxsw_sp_ipips_fini(mlxsw_sp); mlxsw_sp_rifs_fini(mlxsw_sp); __mlxsw_sp_router_fini(mlxsw_sp); unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb); unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb); kfree(mlxsw_sp->router); }
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