35266255d6
The Spectrum ASIC has a dedicated table where nexthops (i.e., adjacency
entries) are populated. The size of this table can be controlled via
devlink-resource.
Add such a resource to netdevsim so that its occupancy will reflect the
number of nexthop objects currently programmed to the device.
By limiting the size of the resource, error paths could be exercised and
tested.
Example output:
# devlink resource show netdevsim/netdevsim10
netdevsim/netdevsim10:
name IPv4 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
resources:
name fib size unlimited occ 4 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name fib-rules size unlimited occ 3 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name IPv6 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
resources:
name fib size unlimited occ 1 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name fib-rules size unlimited occ 2 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name nexthops size unlimited occ 0 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
979 lines
24 KiB
C
979 lines
24 KiB
C
/*
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* Copyright (c) 2018 Cumulus Networks. All rights reserved.
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* Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
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*
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* This software is licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree.
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*
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* THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
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* OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
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* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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*/
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#include <linux/in6.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/rhashtable.h>
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#include <linux/spinlock_types.h>
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#include <linux/types.h>
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#include <net/fib_notifier.h>
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#include <net/ip_fib.h>
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#include <net/ip6_fib.h>
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#include <net/fib_rules.h>
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#include <net/net_namespace.h>
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#include "netdevsim.h"
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struct nsim_fib_entry {
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u64 max;
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u64 num;
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};
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struct nsim_per_fib_data {
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struct nsim_fib_entry fib;
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struct nsim_fib_entry rules;
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};
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struct nsim_fib_data {
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struct notifier_block fib_nb;
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struct nsim_per_fib_data ipv4;
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struct nsim_per_fib_data ipv6;
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struct nsim_fib_entry nexthops;
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struct rhashtable fib_rt_ht;
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struct list_head fib_rt_list;
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spinlock_t fib_lock; /* Protects hashtable, list and accounting */
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struct devlink *devlink;
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};
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struct nsim_fib_rt_key {
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unsigned char addr[sizeof(struct in6_addr)];
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unsigned char prefix_len;
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int family;
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u32 tb_id;
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};
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struct nsim_fib_rt {
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struct nsim_fib_rt_key key;
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struct rhash_head ht_node;
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struct list_head list; /* Member of fib_rt_list */
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};
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struct nsim_fib4_rt {
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struct nsim_fib_rt common;
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struct fib_info *fi;
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u8 tos;
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u8 type;
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};
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struct nsim_fib6_rt {
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struct nsim_fib_rt common;
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struct list_head nh_list;
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unsigned int nhs;
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};
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struct nsim_fib6_rt_nh {
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struct list_head list; /* Member of nh_list */
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struct fib6_info *rt;
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};
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static const struct rhashtable_params nsim_fib_rt_ht_params = {
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.key_offset = offsetof(struct nsim_fib_rt, key),
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.head_offset = offsetof(struct nsim_fib_rt, ht_node),
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.key_len = sizeof(struct nsim_fib_rt_key),
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.automatic_shrinking = true,
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};
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u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
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enum nsim_resource_id res_id, bool max)
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{
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struct nsim_fib_entry *entry;
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switch (res_id) {
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case NSIM_RESOURCE_IPV4_FIB:
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entry = &fib_data->ipv4.fib;
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break;
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case NSIM_RESOURCE_IPV4_FIB_RULES:
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entry = &fib_data->ipv4.rules;
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break;
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case NSIM_RESOURCE_IPV6_FIB:
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entry = &fib_data->ipv6.fib;
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break;
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case NSIM_RESOURCE_IPV6_FIB_RULES:
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entry = &fib_data->ipv6.rules;
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break;
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case NSIM_RESOURCE_NEXTHOPS:
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entry = &fib_data->nexthops;
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break;
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default:
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return 0;
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}
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return max ? entry->max : entry->num;
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}
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static void nsim_fib_set_max(struct nsim_fib_data *fib_data,
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enum nsim_resource_id res_id, u64 val)
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{
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struct nsim_fib_entry *entry;
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switch (res_id) {
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case NSIM_RESOURCE_IPV4_FIB:
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entry = &fib_data->ipv4.fib;
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break;
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case NSIM_RESOURCE_IPV4_FIB_RULES:
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entry = &fib_data->ipv4.rules;
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break;
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case NSIM_RESOURCE_IPV6_FIB:
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entry = &fib_data->ipv6.fib;
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break;
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case NSIM_RESOURCE_IPV6_FIB_RULES:
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entry = &fib_data->ipv6.rules;
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break;
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case NSIM_RESOURCE_NEXTHOPS:
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entry = &fib_data->nexthops;
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break;
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default:
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WARN_ON(1);
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return;
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}
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entry->max = val;
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}
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static int nsim_fib_rule_account(struct nsim_fib_entry *entry, bool add,
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struct netlink_ext_ack *extack)
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{
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int err = 0;
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if (add) {
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if (entry->num < entry->max) {
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entry->num++;
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} else {
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err = -ENOSPC;
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NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported fib rule entries");
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}
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} else {
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entry->num--;
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}
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return err;
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}
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static int nsim_fib_rule_event(struct nsim_fib_data *data,
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struct fib_notifier_info *info, bool add)
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{
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struct netlink_ext_ack *extack = info->extack;
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int err = 0;
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switch (info->family) {
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case AF_INET:
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err = nsim_fib_rule_account(&data->ipv4.rules, add, extack);
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break;
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case AF_INET6:
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err = nsim_fib_rule_account(&data->ipv6.rules, add, extack);
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break;
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}
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return err;
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}
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static int nsim_fib_account(struct nsim_fib_entry *entry, bool add,
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struct netlink_ext_ack *extack)
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{
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int err = 0;
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if (add) {
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if (entry->num < entry->max) {
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entry->num++;
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} else {
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err = -ENOSPC;
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NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported fib entries");
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}
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} else {
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entry->num--;
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}
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return err;
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}
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static void nsim_fib_rt_init(struct nsim_fib_data *data,
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struct nsim_fib_rt *fib_rt, const void *addr,
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size_t addr_len, unsigned int prefix_len,
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int family, u32 tb_id)
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{
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memcpy(fib_rt->key.addr, addr, addr_len);
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fib_rt->key.prefix_len = prefix_len;
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fib_rt->key.family = family;
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fib_rt->key.tb_id = tb_id;
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list_add(&fib_rt->list, &data->fib_rt_list);
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}
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static void nsim_fib_rt_fini(struct nsim_fib_rt *fib_rt)
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{
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list_del(&fib_rt->list);
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}
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static struct nsim_fib_rt *nsim_fib_rt_lookup(struct rhashtable *fib_rt_ht,
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const void *addr, size_t addr_len,
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unsigned int prefix_len,
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int family, u32 tb_id)
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{
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struct nsim_fib_rt_key key;
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memset(&key, 0, sizeof(key));
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memcpy(key.addr, addr, addr_len);
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key.prefix_len = prefix_len;
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key.family = family;
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key.tb_id = tb_id;
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return rhashtable_lookup_fast(fib_rt_ht, &key, nsim_fib_rt_ht_params);
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}
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static struct nsim_fib4_rt *
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nsim_fib4_rt_create(struct nsim_fib_data *data,
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struct fib_entry_notifier_info *fen_info)
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{
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struct nsim_fib4_rt *fib4_rt;
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fib4_rt = kzalloc(sizeof(*fib4_rt), GFP_ATOMIC);
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if (!fib4_rt)
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return NULL;
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nsim_fib_rt_init(data, &fib4_rt->common, &fen_info->dst, sizeof(u32),
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fen_info->dst_len, AF_INET, fen_info->tb_id);
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fib4_rt->fi = fen_info->fi;
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fib_info_hold(fib4_rt->fi);
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fib4_rt->tos = fen_info->tos;
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fib4_rt->type = fen_info->type;
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return fib4_rt;
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}
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static void nsim_fib4_rt_destroy(struct nsim_fib4_rt *fib4_rt)
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{
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fib_info_put(fib4_rt->fi);
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nsim_fib_rt_fini(&fib4_rt->common);
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kfree(fib4_rt);
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}
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static struct nsim_fib4_rt *
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nsim_fib4_rt_lookup(struct rhashtable *fib_rt_ht,
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const struct fib_entry_notifier_info *fen_info)
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{
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struct nsim_fib_rt *fib_rt;
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fib_rt = nsim_fib_rt_lookup(fib_rt_ht, &fen_info->dst, sizeof(u32),
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fen_info->dst_len, AF_INET,
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fen_info->tb_id);
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if (!fib_rt)
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return NULL;
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return container_of(fib_rt, struct nsim_fib4_rt, common);
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}
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static void nsim_fib4_rt_hw_flags_set(struct net *net,
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const struct nsim_fib4_rt *fib4_rt,
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bool trap)
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{
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u32 *p_dst = (u32 *) fib4_rt->common.key.addr;
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int dst_len = fib4_rt->common.key.prefix_len;
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struct fib_rt_info fri;
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fri.fi = fib4_rt->fi;
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fri.tb_id = fib4_rt->common.key.tb_id;
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fri.dst = cpu_to_be32(*p_dst);
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fri.dst_len = dst_len;
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fri.tos = fib4_rt->tos;
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fri.type = fib4_rt->type;
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fri.offload = false;
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fri.trap = trap;
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fib_alias_hw_flags_set(net, &fri);
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}
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static int nsim_fib4_rt_add(struct nsim_fib_data *data,
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struct nsim_fib4_rt *fib4_rt,
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struct netlink_ext_ack *extack)
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{
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struct net *net = devlink_net(data->devlink);
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int err;
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err = nsim_fib_account(&data->ipv4.fib, true, extack);
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if (err)
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return err;
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err = rhashtable_insert_fast(&data->fib_rt_ht,
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&fib4_rt->common.ht_node,
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nsim_fib_rt_ht_params);
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if (err) {
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NL_SET_ERR_MSG_MOD(extack, "Failed to insert IPv4 route");
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goto err_fib_dismiss;
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}
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nsim_fib4_rt_hw_flags_set(net, fib4_rt, true);
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return 0;
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err_fib_dismiss:
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nsim_fib_account(&data->ipv4.fib, false, extack);
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return err;
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}
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static int nsim_fib4_rt_replace(struct nsim_fib_data *data,
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struct nsim_fib4_rt *fib4_rt,
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struct nsim_fib4_rt *fib4_rt_old,
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struct netlink_ext_ack *extack)
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{
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struct net *net = devlink_net(data->devlink);
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int err;
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/* We are replacing a route, so no need to change the accounting. */
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err = rhashtable_replace_fast(&data->fib_rt_ht,
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&fib4_rt_old->common.ht_node,
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&fib4_rt->common.ht_node,
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nsim_fib_rt_ht_params);
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if (err) {
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NL_SET_ERR_MSG_MOD(extack, "Failed to replace IPv4 route");
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return err;
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}
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nsim_fib4_rt_hw_flags_set(net, fib4_rt, true);
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nsim_fib4_rt_hw_flags_set(net, fib4_rt_old, false);
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nsim_fib4_rt_destroy(fib4_rt_old);
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return 0;
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}
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static int nsim_fib4_rt_insert(struct nsim_fib_data *data,
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struct fib_entry_notifier_info *fen_info)
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{
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struct netlink_ext_ack *extack = fen_info->info.extack;
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struct nsim_fib4_rt *fib4_rt, *fib4_rt_old;
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int err;
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fib4_rt = nsim_fib4_rt_create(data, fen_info);
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if (!fib4_rt)
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return -ENOMEM;
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fib4_rt_old = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info);
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if (!fib4_rt_old)
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err = nsim_fib4_rt_add(data, fib4_rt, extack);
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else
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err = nsim_fib4_rt_replace(data, fib4_rt, fib4_rt_old, extack);
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if (err)
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nsim_fib4_rt_destroy(fib4_rt);
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return err;
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}
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static void nsim_fib4_rt_remove(struct nsim_fib_data *data,
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const struct fib_entry_notifier_info *fen_info)
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{
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struct netlink_ext_ack *extack = fen_info->info.extack;
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struct nsim_fib4_rt *fib4_rt;
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fib4_rt = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info);
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if (WARN_ON_ONCE(!fib4_rt))
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return;
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rhashtable_remove_fast(&data->fib_rt_ht, &fib4_rt->common.ht_node,
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nsim_fib_rt_ht_params);
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nsim_fib_account(&data->ipv4.fib, false, extack);
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nsim_fib4_rt_destroy(fib4_rt);
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}
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static int nsim_fib4_event(struct nsim_fib_data *data,
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struct fib_notifier_info *info,
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unsigned long event)
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{
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struct fib_entry_notifier_info *fen_info;
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int err = 0;
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fen_info = container_of(info, struct fib_entry_notifier_info, info);
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if (fen_info->fi->nh) {
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NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
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return 0;
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}
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switch (event) {
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case FIB_EVENT_ENTRY_REPLACE:
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err = nsim_fib4_rt_insert(data, fen_info);
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break;
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case FIB_EVENT_ENTRY_DEL:
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nsim_fib4_rt_remove(data, fen_info);
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break;
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|
default:
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|
break;
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|
}
|
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|
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return err;
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|
}
|
|
|
|
static struct nsim_fib6_rt_nh *
|
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nsim_fib6_rt_nh_find(const struct nsim_fib6_rt *fib6_rt,
|
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const struct fib6_info *rt)
|
|
{
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struct nsim_fib6_rt_nh *fib6_rt_nh;
|
|
|
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list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list) {
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if (fib6_rt_nh->rt == rt)
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return fib6_rt_nh;
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|
}
|
|
|
|
return NULL;
|
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}
|
|
|
|
static int nsim_fib6_rt_nh_add(struct nsim_fib6_rt *fib6_rt,
|
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struct fib6_info *rt)
|
|
{
|
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struct nsim_fib6_rt_nh *fib6_rt_nh;
|
|
|
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fib6_rt_nh = kzalloc(sizeof(*fib6_rt_nh), GFP_ATOMIC);
|
|
if (!fib6_rt_nh)
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return -ENOMEM;
|
|
|
|
fib6_info_hold(rt);
|
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fib6_rt_nh->rt = rt;
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list_add_tail(&fib6_rt_nh->list, &fib6_rt->nh_list);
|
|
fib6_rt->nhs++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nsim_fib6_rt_nh_del(struct nsim_fib6_rt *fib6_rt,
|
|
const struct fib6_info *rt)
|
|
{
|
|
struct nsim_fib6_rt_nh *fib6_rt_nh;
|
|
|
|
fib6_rt_nh = nsim_fib6_rt_nh_find(fib6_rt, rt);
|
|
if (WARN_ON_ONCE(!fib6_rt_nh))
|
|
return;
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|
|
|
fib6_rt->nhs--;
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|
list_del(&fib6_rt_nh->list);
|
|
#if IS_ENABLED(CONFIG_IPV6)
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|
fib6_info_release(fib6_rt_nh->rt);
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|
#endif
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|
kfree(fib6_rt_nh);
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|
}
|
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|
|
static struct nsim_fib6_rt *
|
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nsim_fib6_rt_create(struct nsim_fib_data *data,
|
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struct fib6_entry_notifier_info *fen6_info)
|
|
{
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|
struct fib6_info *iter, *rt = fen6_info->rt;
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
int i = 0;
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int err;
|
|
|
|
fib6_rt = kzalloc(sizeof(*fib6_rt), GFP_ATOMIC);
|
|
if (!fib6_rt)
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|
return ERR_PTR(-ENOMEM);
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|
|
nsim_fib_rt_init(data, &fib6_rt->common, &rt->fib6_dst.addr,
|
|
sizeof(rt->fib6_dst.addr), rt->fib6_dst.plen, AF_INET6,
|
|
rt->fib6_table->tb6_id);
|
|
|
|
/* We consider a multipath IPv6 route as one entry, but it can be made
|
|
* up from several fib6_info structs (one for each nexthop), so we
|
|
* add them all to the same list under the entry.
|
|
*/
|
|
INIT_LIST_HEAD(&fib6_rt->nh_list);
|
|
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, rt);
|
|
if (err)
|
|
goto err_fib_rt_fini;
|
|
|
|
if (!fen6_info->nsiblings)
|
|
return fib6_rt;
|
|
|
|
list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) {
|
|
if (i == fen6_info->nsiblings)
|
|
break;
|
|
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, iter);
|
|
if (err)
|
|
goto err_fib6_rt_nh_del;
|
|
i++;
|
|
}
|
|
WARN_ON_ONCE(i != fen6_info->nsiblings);
|
|
|
|
return fib6_rt;
|
|
|
|
err_fib6_rt_nh_del:
|
|
list_for_each_entry_continue_reverse(iter, &rt->fib6_siblings,
|
|
fib6_siblings)
|
|
nsim_fib6_rt_nh_del(fib6_rt, iter);
|
|
nsim_fib6_rt_nh_del(fib6_rt, rt);
|
|
err_fib_rt_fini:
|
|
nsim_fib_rt_fini(&fib6_rt->common);
|
|
kfree(fib6_rt);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static void nsim_fib6_rt_destroy(struct nsim_fib6_rt *fib6_rt)
|
|
{
|
|
struct nsim_fib6_rt_nh *iter, *tmp;
|
|
|
|
list_for_each_entry_safe(iter, tmp, &fib6_rt->nh_list, list)
|
|
nsim_fib6_rt_nh_del(fib6_rt, iter->rt);
|
|
WARN_ON_ONCE(!list_empty(&fib6_rt->nh_list));
|
|
nsim_fib_rt_fini(&fib6_rt->common);
|
|
kfree(fib6_rt);
|
|
}
|
|
|
|
static struct nsim_fib6_rt *
|
|
nsim_fib6_rt_lookup(struct rhashtable *fib_rt_ht, const struct fib6_info *rt)
|
|
{
|
|
struct nsim_fib_rt *fib_rt;
|
|
|
|
fib_rt = nsim_fib_rt_lookup(fib_rt_ht, &rt->fib6_dst.addr,
|
|
sizeof(rt->fib6_dst.addr),
|
|
rt->fib6_dst.plen, AF_INET6,
|
|
rt->fib6_table->tb6_id);
|
|
if (!fib_rt)
|
|
return NULL;
|
|
|
|
return container_of(fib_rt, struct nsim_fib6_rt, common);
|
|
}
|
|
|
|
static int nsim_fib6_rt_append(struct nsim_fib_data *data,
|
|
struct fib6_entry_notifier_info *fen6_info)
|
|
{
|
|
struct fib6_info *iter, *rt = fen6_info->rt;
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
int i = 0;
|
|
int err;
|
|
|
|
fib6_rt = nsim_fib6_rt_lookup(&data->fib_rt_ht, rt);
|
|
if (WARN_ON_ONCE(!fib6_rt))
|
|
return -EINVAL;
|
|
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, rt);
|
|
if (err)
|
|
return err;
|
|
rt->trap = true;
|
|
|
|
if (!fen6_info->nsiblings)
|
|
return 0;
|
|
|
|
list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) {
|
|
if (i == fen6_info->nsiblings)
|
|
break;
|
|
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, iter);
|
|
if (err)
|
|
goto err_fib6_rt_nh_del;
|
|
iter->trap = true;
|
|
i++;
|
|
}
|
|
WARN_ON_ONCE(i != fen6_info->nsiblings);
|
|
|
|
return 0;
|
|
|
|
err_fib6_rt_nh_del:
|
|
list_for_each_entry_continue_reverse(iter, &rt->fib6_siblings,
|
|
fib6_siblings) {
|
|
iter->trap = false;
|
|
nsim_fib6_rt_nh_del(fib6_rt, iter);
|
|
}
|
|
rt->trap = false;
|
|
nsim_fib6_rt_nh_del(fib6_rt, rt);
|
|
return err;
|
|
}
|
|
|
|
static void nsim_fib6_rt_hw_flags_set(const struct nsim_fib6_rt *fib6_rt,
|
|
bool trap)
|
|
{
|
|
struct nsim_fib6_rt_nh *fib6_rt_nh;
|
|
|
|
list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list)
|
|
fib6_info_hw_flags_set(fib6_rt_nh->rt, false, trap);
|
|
}
|
|
|
|
static int nsim_fib6_rt_add(struct nsim_fib_data *data,
|
|
struct nsim_fib6_rt *fib6_rt,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int err;
|
|
|
|
err = nsim_fib_account(&data->ipv6.fib, true, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rhashtable_insert_fast(&data->fib_rt_ht,
|
|
&fib6_rt->common.ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to insert IPv6 route");
|
|
goto err_fib_dismiss;
|
|
}
|
|
|
|
nsim_fib6_rt_hw_flags_set(fib6_rt, true);
|
|
|
|
return 0;
|
|
|
|
err_fib_dismiss:
|
|
nsim_fib_account(&data->ipv6.fib, false, extack);
|
|
return err;
|
|
}
|
|
|
|
static int nsim_fib6_rt_replace(struct nsim_fib_data *data,
|
|
struct nsim_fib6_rt *fib6_rt,
|
|
struct nsim_fib6_rt *fib6_rt_old,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int err;
|
|
|
|
/* We are replacing a route, so no need to change the accounting. */
|
|
err = rhashtable_replace_fast(&data->fib_rt_ht,
|
|
&fib6_rt_old->common.ht_node,
|
|
&fib6_rt->common.ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to replace IPv6 route");
|
|
return err;
|
|
}
|
|
|
|
nsim_fib6_rt_hw_flags_set(fib6_rt, true);
|
|
|
|
nsim_fib6_rt_hw_flags_set(fib6_rt_old, false);
|
|
nsim_fib6_rt_destroy(fib6_rt_old);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nsim_fib6_rt_insert(struct nsim_fib_data *data,
|
|
struct fib6_entry_notifier_info *fen6_info)
|
|
{
|
|
struct netlink_ext_ack *extack = fen6_info->info.extack;
|
|
struct nsim_fib6_rt *fib6_rt, *fib6_rt_old;
|
|
int err;
|
|
|
|
fib6_rt = nsim_fib6_rt_create(data, fen6_info);
|
|
if (IS_ERR(fib6_rt))
|
|
return PTR_ERR(fib6_rt);
|
|
|
|
fib6_rt_old = nsim_fib6_rt_lookup(&data->fib_rt_ht, fen6_info->rt);
|
|
if (!fib6_rt_old)
|
|
err = nsim_fib6_rt_add(data, fib6_rt, extack);
|
|
else
|
|
err = nsim_fib6_rt_replace(data, fib6_rt, fib6_rt_old, extack);
|
|
|
|
if (err)
|
|
nsim_fib6_rt_destroy(fib6_rt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
nsim_fib6_rt_remove(struct nsim_fib_data *data,
|
|
const struct fib6_entry_notifier_info *fen6_info)
|
|
{
|
|
struct netlink_ext_ack *extack = fen6_info->info.extack;
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
|
|
/* Multipath routes are first added to the FIB trie and only then
|
|
* notified. If we vetoed the addition, we will get a delete
|
|
* notification for a route we do not have. Therefore, do not warn if
|
|
* route was not found.
|
|
*/
|
|
fib6_rt = nsim_fib6_rt_lookup(&data->fib_rt_ht, fen6_info->rt);
|
|
if (!fib6_rt)
|
|
return;
|
|
|
|
/* If not all the nexthops are deleted, then only reduce the nexthop
|
|
* group.
|
|
*/
|
|
if (fen6_info->nsiblings + 1 != fib6_rt->nhs) {
|
|
nsim_fib6_rt_nh_del(fib6_rt, fen6_info->rt);
|
|
return;
|
|
}
|
|
|
|
rhashtable_remove_fast(&data->fib_rt_ht, &fib6_rt->common.ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
nsim_fib_account(&data->ipv6.fib, false, extack);
|
|
nsim_fib6_rt_destroy(fib6_rt);
|
|
}
|
|
|
|
static int nsim_fib6_event(struct nsim_fib_data *data,
|
|
struct fib_notifier_info *info,
|
|
unsigned long event)
|
|
{
|
|
struct fib6_entry_notifier_info *fen6_info;
|
|
int err = 0;
|
|
|
|
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 0;
|
|
}
|
|
|
|
if (fen6_info->rt->fib6_src.plen) {
|
|
NL_SET_ERR_MSG_MOD(info->extack, "IPv6 source-specific route is not supported");
|
|
return 0;
|
|
}
|
|
|
|
switch (event) {
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
err = nsim_fib6_rt_insert(data, fen6_info);
|
|
break;
|
|
case FIB_EVENT_ENTRY_APPEND:
|
|
err = nsim_fib6_rt_append(data, fen6_info);
|
|
break;
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
nsim_fib6_rt_remove(data, fen6_info);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int nsim_fib_event(struct nsim_fib_data *data,
|
|
struct fib_notifier_info *info, unsigned long event)
|
|
{
|
|
int err = 0;
|
|
|
|
switch (info->family) {
|
|
case AF_INET:
|
|
err = nsim_fib4_event(data, info, event);
|
|
break;
|
|
case AF_INET6:
|
|
err = nsim_fib6_event(data, info, event);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data,
|
|
fib_nb);
|
|
struct fib_notifier_info *info = ptr;
|
|
int err = 0;
|
|
|
|
/* IPv6 routes can be added via RAs from softIRQ. */
|
|
spin_lock_bh(&data->fib_lock);
|
|
|
|
switch (event) {
|
|
case FIB_EVENT_RULE_ADD:
|
|
case FIB_EVENT_RULE_DEL:
|
|
err = nsim_fib_rule_event(data, info,
|
|
event == FIB_EVENT_RULE_ADD);
|
|
break;
|
|
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
case FIB_EVENT_ENTRY_APPEND:
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
err = nsim_fib_event(data, info, event);
|
|
break;
|
|
}
|
|
|
|
spin_unlock_bh(&data->fib_lock);
|
|
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
static void nsim_fib4_rt_free(struct nsim_fib_rt *fib_rt,
|
|
struct nsim_fib_data *data)
|
|
{
|
|
struct devlink *devlink = data->devlink;
|
|
struct nsim_fib4_rt *fib4_rt;
|
|
|
|
fib4_rt = container_of(fib_rt, struct nsim_fib4_rt, common);
|
|
nsim_fib4_rt_hw_flags_set(devlink_net(devlink), fib4_rt, false);
|
|
nsim_fib_account(&data->ipv4.fib, false, NULL);
|
|
nsim_fib4_rt_destroy(fib4_rt);
|
|
}
|
|
|
|
static void nsim_fib6_rt_free(struct nsim_fib_rt *fib_rt,
|
|
struct nsim_fib_data *data)
|
|
{
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
|
|
fib6_rt = container_of(fib_rt, struct nsim_fib6_rt, common);
|
|
nsim_fib6_rt_hw_flags_set(fib6_rt, false);
|
|
nsim_fib_account(&data->ipv6.fib, false, NULL);
|
|
nsim_fib6_rt_destroy(fib6_rt);
|
|
}
|
|
|
|
static void nsim_fib_rt_free(void *ptr, void *arg)
|
|
{
|
|
struct nsim_fib_rt *fib_rt = ptr;
|
|
struct nsim_fib_data *data = arg;
|
|
|
|
switch (fib_rt->key.family) {
|
|
case AF_INET:
|
|
nsim_fib4_rt_free(fib_rt, data);
|
|
break;
|
|
case AF_INET6:
|
|
nsim_fib6_rt_free(fib_rt, data);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
}
|
|
|
|
/* inconsistent dump, trying again */
|
|
static void nsim_fib_dump_inconsistent(struct notifier_block *nb)
|
|
{
|
|
struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data,
|
|
fib_nb);
|
|
struct nsim_fib_rt *fib_rt, *fib_rt_tmp;
|
|
|
|
/* The notifier block is still not registered, so we do not need to
|
|
* take any locks here.
|
|
*/
|
|
list_for_each_entry_safe(fib_rt, fib_rt_tmp, &data->fib_rt_list, list) {
|
|
rhashtable_remove_fast(&data->fib_rt_ht, &fib_rt->ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
nsim_fib_rt_free(fib_rt, data);
|
|
}
|
|
|
|
data->ipv4.rules.num = 0ULL;
|
|
data->ipv6.rules.num = 0ULL;
|
|
}
|
|
|
|
static u64 nsim_fib_ipv4_resource_occ_get(void *priv)
|
|
{
|
|
struct nsim_fib_data *data = priv;
|
|
|
|
return nsim_fib_get_val(data, NSIM_RESOURCE_IPV4_FIB, false);
|
|
}
|
|
|
|
static u64 nsim_fib_ipv4_rules_res_occ_get(void *priv)
|
|
{
|
|
struct nsim_fib_data *data = priv;
|
|
|
|
return nsim_fib_get_val(data, NSIM_RESOURCE_IPV4_FIB_RULES, false);
|
|
}
|
|
|
|
static u64 nsim_fib_ipv6_resource_occ_get(void *priv)
|
|
{
|
|
struct nsim_fib_data *data = priv;
|
|
|
|
return nsim_fib_get_val(data, NSIM_RESOURCE_IPV6_FIB, false);
|
|
}
|
|
|
|
static u64 nsim_fib_ipv6_rules_res_occ_get(void *priv)
|
|
{
|
|
struct nsim_fib_data *data = priv;
|
|
|
|
return nsim_fib_get_val(data, NSIM_RESOURCE_IPV6_FIB_RULES, false);
|
|
}
|
|
|
|
static u64 nsim_fib_nexthops_res_occ_get(void *priv)
|
|
{
|
|
struct nsim_fib_data *data = priv;
|
|
|
|
return nsim_fib_get_val(data, NSIM_RESOURCE_NEXTHOPS, false);
|
|
}
|
|
|
|
static void nsim_fib_set_max_all(struct nsim_fib_data *data,
|
|
struct devlink *devlink)
|
|
{
|
|
enum nsim_resource_id res_ids[] = {
|
|
NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
|
|
NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES,
|
|
NSIM_RESOURCE_NEXTHOPS,
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(res_ids); i++) {
|
|
int err;
|
|
u64 val;
|
|
|
|
err = devlink_resource_size_get(devlink, res_ids[i], &val);
|
|
if (err)
|
|
val = (u64) -1;
|
|
nsim_fib_set_max(data, res_ids[i], val);
|
|
}
|
|
}
|
|
|
|
struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_fib_data *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return ERR_PTR(-ENOMEM);
|
|
data->devlink = devlink;
|
|
|
|
spin_lock_init(&data->fib_lock);
|
|
INIT_LIST_HEAD(&data->fib_rt_list);
|
|
err = rhashtable_init(&data->fib_rt_ht, &nsim_fib_rt_ht_params);
|
|
if (err)
|
|
goto err_data_free;
|
|
|
|
nsim_fib_set_max_all(data, devlink);
|
|
|
|
data->fib_nb.notifier_call = nsim_fib_event_nb;
|
|
err = register_fib_notifier(devlink_net(devlink), &data->fib_nb,
|
|
nsim_fib_dump_inconsistent, extack);
|
|
if (err) {
|
|
pr_err("Failed to register fib notifier\n");
|
|
goto err_rhashtable_destroy;
|
|
}
|
|
|
|
devlink_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB,
|
|
nsim_fib_ipv4_resource_occ_get,
|
|
data);
|
|
devlink_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB_RULES,
|
|
nsim_fib_ipv4_rules_res_occ_get,
|
|
data);
|
|
devlink_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB,
|
|
nsim_fib_ipv6_resource_occ_get,
|
|
data);
|
|
devlink_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB_RULES,
|
|
nsim_fib_ipv6_rules_res_occ_get,
|
|
data);
|
|
devlink_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_NEXTHOPS,
|
|
nsim_fib_nexthops_res_occ_get,
|
|
data);
|
|
return data;
|
|
|
|
err_rhashtable_destroy:
|
|
rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free,
|
|
data);
|
|
err_data_free:
|
|
kfree(data);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *data)
|
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{
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devlink_resource_occ_get_unregister(devlink,
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NSIM_RESOURCE_NEXTHOPS);
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devlink_resource_occ_get_unregister(devlink,
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NSIM_RESOURCE_IPV6_FIB_RULES);
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devlink_resource_occ_get_unregister(devlink,
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NSIM_RESOURCE_IPV6_FIB);
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devlink_resource_occ_get_unregister(devlink,
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NSIM_RESOURCE_IPV4_FIB_RULES);
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devlink_resource_occ_get_unregister(devlink,
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NSIM_RESOURCE_IPV4_FIB);
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unregister_fib_notifier(devlink_net(devlink), &data->fib_nb);
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rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free,
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data);
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WARN_ON_ONCE(!list_empty(&data->fib_rt_list));
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kfree(data);
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}
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