1670 lines
41 KiB
C
1670 lines
41 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/bitmap.h>
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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/inet_dscp.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 <net/nexthop.h>
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#include <linux/debugfs.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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atomic64_t 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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struct mutex fib_lock; /* Protects FIB HT and list */
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struct notifier_block nexthop_nb;
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struct rhashtable nexthop_ht;
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struct devlink *devlink;
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struct work_struct fib_event_work;
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struct work_struct fib_flush_work;
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struct list_head fib_event_queue;
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spinlock_t fib_event_queue_lock; /* Protects fib event queue list */
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struct mutex nh_lock; /* Protects NH HT */
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struct dentry *ddir;
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bool fail_route_offload;
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bool fail_res_nexthop_group_replace;
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bool fail_nexthop_bucket_replace;
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bool fail_route_delete;
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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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dscp_t dscp;
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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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struct nsim_fib6_event {
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struct fib6_info **rt_arr;
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unsigned int nrt6;
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};
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struct nsim_fib_event {
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struct list_head list; /* node in fib queue */
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union {
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struct fib_entry_notifier_info fen_info;
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struct nsim_fib6_event fib6_event;
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};
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struct nsim_fib_data *data;
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unsigned long event;
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int family;
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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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struct nsim_nexthop {
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struct rhash_head ht_node;
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u64 occ;
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u32 id;
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bool is_resilient;
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};
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static const struct rhashtable_params nsim_nexthop_ht_params = {
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.key_offset = offsetof(struct nsim_nexthop, id),
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.head_offset = offsetof(struct nsim_nexthop, ht_node),
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.key_len = sizeof(u32),
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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 : atomic64_read(&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 (!atomic64_add_unless(&entry->num, 1, entry->max)) {
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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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atomic64_dec_if_positive(&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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{
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int err = 0;
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if (add) {
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if (!atomic64_add_unless(&entry->num, 1, entry->max))
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err = -ENOSPC;
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} else {
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atomic64_dec_if_positive(&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_KERNEL);
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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->dscp = fen_info->dscp;
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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
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nsim_fib4_rt_offload_failed_flag_set(struct net *net,
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struct fib_entry_notifier_info *fen_info)
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{
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u32 *p_dst = (u32 *)&fen_info->dst;
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struct fib_rt_info fri;
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fri.fi = fen_info->fi;
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fri.tb_id = fen_info->tb_id;
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fri.dst = cpu_to_be32(*p_dst);
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fri.dst_len = fen_info->dst_len;
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fri.dscp = fen_info->dscp;
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fri.type = fen_info->type;
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fri.offload = false;
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fri.trap = false;
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fri.offload_failed = true;
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fib_alias_hw_flags_set(net, &fri);
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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.dscp = fib4_rt->dscp;
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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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fri.offload_failed = false;
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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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{
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struct net *net = devlink_net(data->devlink);
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int 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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goto err_fib_dismiss;
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/* Simulate hardware programming latency. */
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msleep(1);
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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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/* Drop the accounting that was increased from the notification
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* context when FIB_EVENT_ENTRY_REPLACE was triggered.
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*/
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nsim_fib_account(&data->ipv4.fib, false);
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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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{
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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 need to remove the accounting which
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* was increased when FIB_EVENT_ENTRY_REPLACE was triggered.
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*/
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err = nsim_fib_account(&data->ipv4.fib, false);
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if (err)
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return err;
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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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return err;
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msleep(1);
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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 nsim_fib4_rt *fib4_rt, *fib4_rt_old;
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int err;
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if (data->fail_route_offload) {
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/* For testing purposes, user set debugfs fail_route_offload
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* value to true. Simulate hardware programming latency and then
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* fail.
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*/
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msleep(1);
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return -EINVAL;
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}
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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);
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else
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err = nsim_fib4_rt_replace(data, fib4_rt, fib4_rt_old);
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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 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 (!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_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_entry_notifier_info *fen_info,
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unsigned long event)
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{
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int err = 0;
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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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if (err) {
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struct net *net = devlink_net(data->devlink);
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nsim_fib4_rt_offload_failed_flag_set(net, fen_info);
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}
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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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return err;
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}
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|
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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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{
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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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}
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return NULL;
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}
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|
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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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{
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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_KERNEL);
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if (!fib6_rt_nh)
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return -ENOMEM;
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|
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fib6_info_hold(rt);
|
|
fib6_rt_nh->rt = rt;
|
|
list_add_tail(&fib6_rt_nh->list, &fib6_rt->nh_list);
|
|
fib6_rt->nhs++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void nsim_rt6_release(struct fib6_info *rt)
|
|
{
|
|
fib6_info_release(rt);
|
|
}
|
|
#else
|
|
static void nsim_rt6_release(struct fib6_info *rt)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
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 (!fib6_rt_nh)
|
|
return;
|
|
|
|
fib6_rt->nhs--;
|
|
list_del(&fib6_rt_nh->list);
|
|
nsim_rt6_release(fib6_rt_nh->rt);
|
|
kfree(fib6_rt_nh);
|
|
}
|
|
|
|
static struct nsim_fib6_rt *
|
|
nsim_fib6_rt_create(struct nsim_fib_data *data,
|
|
struct fib6_info **rt_arr, unsigned int nrt6)
|
|
{
|
|
struct fib6_info *rt = rt_arr[0];
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
int i = 0;
|
|
int err;
|
|
|
|
fib6_rt = kzalloc(sizeof(*fib6_rt), GFP_KERNEL);
|
|
if (!fib6_rt)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
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);
|
|
|
|
for (i = 0; i < nrt6; i++) {
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, rt_arr[i]);
|
|
if (err)
|
|
goto err_fib6_rt_nh_del;
|
|
}
|
|
|
|
return fib6_rt;
|
|
|
|
err_fib6_rt_nh_del:
|
|
for (i--; i >= 0; i--) {
|
|
nsim_fib6_rt_nh_del(fib6_rt, rt_arr[i]);
|
|
}
|
|
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 nsim_fib6_event *fib6_event)
|
|
{
|
|
struct fib6_info *rt = fib6_event->rt_arr[0];
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
int i, err;
|
|
|
|
if (data->fail_route_offload) {
|
|
/* For testing purposes, user set debugfs fail_route_offload
|
|
* value to true. Simulate hardware programming latency and then
|
|
* fail.
|
|
*/
|
|
msleep(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
fib6_rt = nsim_fib6_rt_lookup(&data->fib_rt_ht, rt);
|
|
if (!fib6_rt)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < fib6_event->nrt6; i++) {
|
|
err = nsim_fib6_rt_nh_add(fib6_rt, fib6_event->rt_arr[i]);
|
|
if (err)
|
|
goto err_fib6_rt_nh_del;
|
|
|
|
WRITE_ONCE(fib6_event->rt_arr[i]->trap, true);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_fib6_rt_nh_del:
|
|
for (i--; i >= 0; i--) {
|
|
WRITE_ONCE(fib6_event->rt_arr[i]->trap, false);
|
|
nsim_fib6_rt_nh_del(fib6_rt, fib6_event->rt_arr[i]);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void nsim_fib6_rt_offload_failed_flag_set(struct nsim_fib_data *data,
|
|
struct fib6_info **rt_arr,
|
|
unsigned int nrt6)
|
|
|
|
{
|
|
struct net *net = devlink_net(data->devlink);
|
|
int i;
|
|
|
|
for (i = 0; i < nrt6; i++)
|
|
fib6_info_hw_flags_set(net, rt_arr[i], false, false, true);
|
|
}
|
|
#else
|
|
static void nsim_fib6_rt_offload_failed_flag_set(struct nsim_fib_data *data,
|
|
struct fib6_info **rt_arr,
|
|
unsigned int nrt6)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static void nsim_fib6_rt_hw_flags_set(struct nsim_fib_data *data,
|
|
const struct nsim_fib6_rt *fib6_rt,
|
|
bool trap)
|
|
{
|
|
struct net *net = devlink_net(data->devlink);
|
|
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(net, fib6_rt_nh->rt, false, trap, false);
|
|
}
|
|
#else
|
|
static void nsim_fib6_rt_hw_flags_set(struct nsim_fib_data *data,
|
|
const struct nsim_fib6_rt *fib6_rt,
|
|
bool trap)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int nsim_fib6_rt_add(struct nsim_fib_data *data,
|
|
struct nsim_fib6_rt *fib6_rt)
|
|
{
|
|
int err;
|
|
|
|
err = rhashtable_insert_fast(&data->fib_rt_ht,
|
|
&fib6_rt->common.ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
|
|
if (err)
|
|
goto err_fib_dismiss;
|
|
|
|
msleep(1);
|
|
nsim_fib6_rt_hw_flags_set(data, fib6_rt, true);
|
|
|
|
return 0;
|
|
|
|
err_fib_dismiss:
|
|
/* Drop the accounting that was increased from the notification
|
|
* context when FIB_EVENT_ENTRY_REPLACE was triggered.
|
|
*/
|
|
nsim_fib_account(&data->ipv6.fib, false);
|
|
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)
|
|
{
|
|
int err;
|
|
|
|
/* We are replacing a route, so need to remove the accounting which
|
|
* was increased when FIB_EVENT_ENTRY_REPLACE was triggered.
|
|
*/
|
|
err = nsim_fib_account(&data->ipv6.fib, false);
|
|
if (err)
|
|
return err;
|
|
|
|
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)
|
|
return err;
|
|
|
|
msleep(1);
|
|
nsim_fib6_rt_hw_flags_set(data, fib6_rt, true);
|
|
|
|
nsim_fib6_rt_hw_flags_set(data, 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 nsim_fib6_event *fib6_event)
|
|
{
|
|
struct fib6_info *rt = fib6_event->rt_arr[0];
|
|
struct nsim_fib6_rt *fib6_rt, *fib6_rt_old;
|
|
int err;
|
|
|
|
if (data->fail_route_offload) {
|
|
/* For testing purposes, user set debugfs fail_route_offload
|
|
* value to true. Simulate hardware programming latency and then
|
|
* fail.
|
|
*/
|
|
msleep(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
fib6_rt = nsim_fib6_rt_create(data, fib6_event->rt_arr,
|
|
fib6_event->nrt6);
|
|
if (IS_ERR(fib6_rt))
|
|
return PTR_ERR(fib6_rt);
|
|
|
|
fib6_rt_old = nsim_fib6_rt_lookup(&data->fib_rt_ht, rt);
|
|
if (!fib6_rt_old)
|
|
err = nsim_fib6_rt_add(data, fib6_rt);
|
|
else
|
|
err = nsim_fib6_rt_replace(data, fib6_rt, fib6_rt_old);
|
|
|
|
if (err)
|
|
nsim_fib6_rt_destroy(fib6_rt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void nsim_fib6_rt_remove(struct nsim_fib_data *data,
|
|
struct nsim_fib6_event *fib6_event)
|
|
{
|
|
struct fib6_info *rt = fib6_event->rt_arr[0];
|
|
struct nsim_fib6_rt *fib6_rt;
|
|
int i;
|
|
|
|
/* 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, rt);
|
|
if (!fib6_rt)
|
|
return;
|
|
|
|
/* If not all the nexthops are deleted, then only reduce the nexthop
|
|
* group.
|
|
*/
|
|
if (fib6_event->nrt6 != fib6_rt->nhs) {
|
|
for (i = 0; i < fib6_event->nrt6; i++)
|
|
nsim_fib6_rt_nh_del(fib6_rt, fib6_event->rt_arr[i]);
|
|
return;
|
|
}
|
|
|
|
rhashtable_remove_fast(&data->fib_rt_ht, &fib6_rt->common.ht_node,
|
|
nsim_fib_rt_ht_params);
|
|
nsim_fib6_rt_destroy(fib6_rt);
|
|
}
|
|
|
|
static int nsim_fib6_event_init(struct nsim_fib6_event *fib6_event,
|
|
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_event->rt_arr = rt_arr;
|
|
fib6_event->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 nsim_fib6_event_fini(struct nsim_fib6_event *fib6_event)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < fib6_event->nrt6; i++)
|
|
nsim_rt6_release(fib6_event->rt_arr[i]);
|
|
kfree(fib6_event->rt_arr);
|
|
}
|
|
|
|
static int nsim_fib6_event(struct nsim_fib_data *data,
|
|
struct nsim_fib6_event *fib6_event,
|
|
unsigned long event)
|
|
{
|
|
int err;
|
|
|
|
if (fib6_event->rt_arr[0]->fib6_src.plen)
|
|
return 0;
|
|
|
|
switch (event) {
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
err = nsim_fib6_rt_insert(data, fib6_event);
|
|
if (err)
|
|
goto err_rt_offload_failed_flag_set;
|
|
break;
|
|
case FIB_EVENT_ENTRY_APPEND:
|
|
err = nsim_fib6_rt_append(data, fib6_event);
|
|
if (err)
|
|
goto err_rt_offload_failed_flag_set;
|
|
break;
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
nsim_fib6_rt_remove(data, fib6_event);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_rt_offload_failed_flag_set:
|
|
nsim_fib6_rt_offload_failed_flag_set(data, fib6_event->rt_arr,
|
|
fib6_event->nrt6);
|
|
return err;
|
|
}
|
|
|
|
static void nsim_fib_event(struct nsim_fib_event *fib_event)
|
|
{
|
|
switch (fib_event->family) {
|
|
case AF_INET:
|
|
nsim_fib4_event(fib_event->data, &fib_event->fen_info,
|
|
fib_event->event);
|
|
fib_info_put(fib_event->fen_info.fi);
|
|
break;
|
|
case AF_INET6:
|
|
nsim_fib6_event(fib_event->data, &fib_event->fib6_event,
|
|
fib_event->event);
|
|
nsim_fib6_event_fini(&fib_event->fib6_event);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int nsim_fib4_prepare_event(struct fib_notifier_info *info,
|
|
struct nsim_fib_event *fib_event,
|
|
unsigned long event)
|
|
{
|
|
struct nsim_fib_data *data = fib_event->data;
|
|
struct fib_entry_notifier_info *fen_info;
|
|
struct netlink_ext_ack *extack;
|
|
int err = 0;
|
|
|
|
fen_info = container_of(info, struct fib_entry_notifier_info,
|
|
info);
|
|
fib_event->fen_info = *fen_info;
|
|
extack = info->extack;
|
|
|
|
switch (event) {
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
err = nsim_fib_account(&data->ipv4.fib, true);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported fib entries");
|
|
return err;
|
|
}
|
|
break;
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
if (data->fail_route_delete) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to process route deletion");
|
|
return -EINVAL;
|
|
}
|
|
nsim_fib_account(&data->ipv4.fib, false);
|
|
break;
|
|
}
|
|
|
|
/* Take reference on fib_info to prevent it from being
|
|
* freed while event is queued. Release it afterwards.
|
|
*/
|
|
fib_info_hold(fib_event->fen_info.fi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nsim_fib6_prepare_event(struct fib_notifier_info *info,
|
|
struct nsim_fib_event *fib_event,
|
|
unsigned long event)
|
|
{
|
|
struct nsim_fib_data *data = fib_event->data;
|
|
struct fib6_entry_notifier_info *fen6_info;
|
|
struct netlink_ext_ack *extack;
|
|
int err = 0;
|
|
|
|
fen6_info = container_of(info, struct fib6_entry_notifier_info,
|
|
info);
|
|
|
|
err = nsim_fib6_event_init(&fib_event->fib6_event, fen6_info);
|
|
if (err)
|
|
return err;
|
|
|
|
extack = info->extack;
|
|
switch (event) {
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
err = nsim_fib_account(&data->ipv6.fib, true);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported fib entries");
|
|
goto err_fib6_event_fini;
|
|
}
|
|
break;
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
if (data->fail_route_delete) {
|
|
err = -EINVAL;
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to process route deletion");
|
|
goto err_fib6_event_fini;
|
|
}
|
|
nsim_fib_account(&data->ipv6.fib, false);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_fib6_event_fini:
|
|
nsim_fib6_event_fini(&fib_event->fib6_event);
|
|
return err;
|
|
}
|
|
|
|
static int nsim_fib_event_schedule_work(struct nsim_fib_data *data,
|
|
struct fib_notifier_info *info,
|
|
unsigned long event)
|
|
{
|
|
struct nsim_fib_event *fib_event;
|
|
int err;
|
|
|
|
if (info->family != AF_INET && info->family != AF_INET6)
|
|
/* netdevsim does not support 'RTNL_FAMILY_IP6MR' and
|
|
* 'RTNL_FAMILY_IPMR' and should ignore them.
|
|
*/
|
|
return NOTIFY_DONE;
|
|
|
|
fib_event = kzalloc(sizeof(*fib_event), GFP_ATOMIC);
|
|
if (!fib_event)
|
|
goto err_fib_event_alloc;
|
|
|
|
fib_event->data = data;
|
|
fib_event->event = event;
|
|
fib_event->family = info->family;
|
|
|
|
switch (info->family) {
|
|
case AF_INET:
|
|
err = nsim_fib4_prepare_event(info, fib_event, event);
|
|
break;
|
|
case AF_INET6:
|
|
err = nsim_fib6_prepare_event(info, fib_event, event);
|
|
break;
|
|
}
|
|
|
|
if (err)
|
|
goto err_fib_prepare_event;
|
|
|
|
/* Enqueue the event and trigger the work */
|
|
spin_lock_bh(&data->fib_event_queue_lock);
|
|
list_add_tail(&fib_event->list, &data->fib_event_queue);
|
|
spin_unlock_bh(&data->fib_event_queue_lock);
|
|
schedule_work(&data->fib_event_work);
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
err_fib_prepare_event:
|
|
kfree(fib_event);
|
|
err_fib_event_alloc:
|
|
if (event == FIB_EVENT_ENTRY_DEL)
|
|
schedule_work(&data->fib_flush_work);
|
|
return NOTIFY_BAD;
|
|
}
|
|
|
|
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;
|
|
|
|
switch (event) {
|
|
case FIB_EVENT_RULE_ADD:
|
|
case FIB_EVENT_RULE_DEL:
|
|
err = nsim_fib_rule_event(data, info,
|
|
event == FIB_EVENT_RULE_ADD);
|
|
return notifier_from_errno(err);
|
|
case FIB_EVENT_ENTRY_REPLACE:
|
|
case FIB_EVENT_ENTRY_APPEND:
|
|
case FIB_EVENT_ENTRY_DEL:
|
|
return nsim_fib_event_schedule_work(data, info, event);
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
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);
|
|
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(data, fib6_rt, false);
|
|
nsim_fib_account(&data->ipv6.fib, false);
|
|
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;
|
|
|
|
/* Flush the work to make sure there is no race with notifications. */
|
|
flush_work(&data->fib_event_work);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
atomic64_set(&data->ipv4.rules.num, 0ULL);
|
|
atomic64_set(&data->ipv6.rules.num, 0ULL);
|
|
}
|
|
|
|
static struct nsim_nexthop *nsim_nexthop_create(struct nsim_fib_data *data,
|
|
struct nh_notifier_info *info)
|
|
{
|
|
struct nsim_nexthop *nexthop;
|
|
u64 occ = 0;
|
|
int i;
|
|
|
|
nexthop = kzalloc(sizeof(*nexthop), GFP_KERNEL);
|
|
if (!nexthop)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
nexthop->id = info->id;
|
|
|
|
/* Determine the number of nexthop entries the new nexthop will
|
|
* occupy.
|
|
*/
|
|
|
|
switch (info->type) {
|
|
case NH_NOTIFIER_INFO_TYPE_SINGLE:
|
|
occ = 1;
|
|
break;
|
|
case NH_NOTIFIER_INFO_TYPE_GRP:
|
|
for (i = 0; i < info->nh_grp->num_nh; i++)
|
|
occ += info->nh_grp->nh_entries[i].weight;
|
|
break;
|
|
case NH_NOTIFIER_INFO_TYPE_RES_TABLE:
|
|
occ = info->nh_res_table->num_nh_buckets;
|
|
nexthop->is_resilient = true;
|
|
break;
|
|
default:
|
|
NL_SET_ERR_MSG_MOD(info->extack, "Unsupported nexthop type");
|
|
kfree(nexthop);
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
nexthop->occ = occ;
|
|
return nexthop;
|
|
}
|
|
|
|
static void nsim_nexthop_destroy(struct nsim_nexthop *nexthop)
|
|
{
|
|
kfree(nexthop);
|
|
}
|
|
|
|
static int nsim_nexthop_account(struct nsim_fib_data *data, u64 occ,
|
|
bool add, struct netlink_ext_ack *extack)
|
|
{
|
|
int i, err = 0;
|
|
|
|
if (add) {
|
|
for (i = 0; i < occ; i++)
|
|
if (!atomic64_add_unless(&data->nexthops.num, 1,
|
|
data->nexthops.max)) {
|
|
err = -ENOSPC;
|
|
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported nexthops");
|
|
goto err_num_decrease;
|
|
}
|
|
} else {
|
|
if (WARN_ON(occ > atomic64_read(&data->nexthops.num)))
|
|
return -EINVAL;
|
|
atomic64_sub(occ, &data->nexthops.num);
|
|
}
|
|
|
|
return err;
|
|
|
|
err_num_decrease:
|
|
atomic64_sub(i, &data->nexthops.num);
|
|
return err;
|
|
|
|
}
|
|
|
|
static void nsim_nexthop_hw_flags_set(struct net *net,
|
|
const struct nsim_nexthop *nexthop,
|
|
bool trap)
|
|
{
|
|
int i;
|
|
|
|
nexthop_set_hw_flags(net, nexthop->id, false, trap);
|
|
|
|
if (!nexthop->is_resilient)
|
|
return;
|
|
|
|
for (i = 0; i < nexthop->occ; i++)
|
|
nexthop_bucket_set_hw_flags(net, nexthop->id, i, false, trap);
|
|
}
|
|
|
|
static int nsim_nexthop_add(struct nsim_fib_data *data,
|
|
struct nsim_nexthop *nexthop,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = devlink_net(data->devlink);
|
|
int err;
|
|
|
|
err = nsim_nexthop_account(data, nexthop->occ, true, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rhashtable_insert_fast(&data->nexthop_ht, &nexthop->ht_node,
|
|
nsim_nexthop_ht_params);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to insert nexthop");
|
|
goto err_nexthop_dismiss;
|
|
}
|
|
|
|
nsim_nexthop_hw_flags_set(net, nexthop, true);
|
|
|
|
return 0;
|
|
|
|
err_nexthop_dismiss:
|
|
nsim_nexthop_account(data, nexthop->occ, false, extack);
|
|
return err;
|
|
}
|
|
|
|
static int nsim_nexthop_replace(struct nsim_fib_data *data,
|
|
struct nsim_nexthop *nexthop,
|
|
struct nsim_nexthop *nexthop_old,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = devlink_net(data->devlink);
|
|
int err;
|
|
|
|
err = nsim_nexthop_account(data, nexthop->occ, true, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rhashtable_replace_fast(&data->nexthop_ht,
|
|
&nexthop_old->ht_node, &nexthop->ht_node,
|
|
nsim_nexthop_ht_params);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to replace nexthop");
|
|
goto err_nexthop_dismiss;
|
|
}
|
|
|
|
nsim_nexthop_hw_flags_set(net, nexthop, true);
|
|
nsim_nexthop_account(data, nexthop_old->occ, false, extack);
|
|
nsim_nexthop_destroy(nexthop_old);
|
|
|
|
return 0;
|
|
|
|
err_nexthop_dismiss:
|
|
nsim_nexthop_account(data, nexthop->occ, false, extack);
|
|
return err;
|
|
}
|
|
|
|
static int nsim_nexthop_insert(struct nsim_fib_data *data,
|
|
struct nh_notifier_info *info)
|
|
{
|
|
struct nsim_nexthop *nexthop, *nexthop_old;
|
|
int err;
|
|
|
|
nexthop = nsim_nexthop_create(data, info);
|
|
if (IS_ERR(nexthop))
|
|
return PTR_ERR(nexthop);
|
|
|
|
nexthop_old = rhashtable_lookup_fast(&data->nexthop_ht, &info->id,
|
|
nsim_nexthop_ht_params);
|
|
if (!nexthop_old)
|
|
err = nsim_nexthop_add(data, nexthop, info->extack);
|
|
else
|
|
err = nsim_nexthop_replace(data, nexthop, nexthop_old,
|
|
info->extack);
|
|
|
|
if (err)
|
|
nsim_nexthop_destroy(nexthop);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void nsim_nexthop_remove(struct nsim_fib_data *data,
|
|
struct nh_notifier_info *info)
|
|
{
|
|
struct nsim_nexthop *nexthop;
|
|
|
|
nexthop = rhashtable_lookup_fast(&data->nexthop_ht, &info->id,
|
|
nsim_nexthop_ht_params);
|
|
if (!nexthop)
|
|
return;
|
|
|
|
rhashtable_remove_fast(&data->nexthop_ht, &nexthop->ht_node,
|
|
nsim_nexthop_ht_params);
|
|
nsim_nexthop_account(data, nexthop->occ, false, info->extack);
|
|
nsim_nexthop_destroy(nexthop);
|
|
}
|
|
|
|
static int nsim_nexthop_res_table_pre_replace(struct nsim_fib_data *data,
|
|
struct nh_notifier_info *info)
|
|
{
|
|
if (data->fail_res_nexthop_group_replace) {
|
|
NL_SET_ERR_MSG_MOD(info->extack, "Failed to replace a resilient nexthop group");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nsim_nexthop_bucket_replace(struct nsim_fib_data *data,
|
|
struct nh_notifier_info *info)
|
|
{
|
|
if (data->fail_nexthop_bucket_replace) {
|
|
NL_SET_ERR_MSG_MOD(info->extack, "Failed to replace nexthop bucket");
|
|
return -EINVAL;
|
|
}
|
|
|
|
nexthop_bucket_set_hw_flags(info->net, info->id,
|
|
info->nh_res_bucket->bucket_index,
|
|
false, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nsim_nexthop_event_nb(struct notifier_block *nb, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data,
|
|
nexthop_nb);
|
|
struct nh_notifier_info *info = ptr;
|
|
int err = 0;
|
|
|
|
mutex_lock(&data->nh_lock);
|
|
switch (event) {
|
|
case NEXTHOP_EVENT_REPLACE:
|
|
err = nsim_nexthop_insert(data, info);
|
|
break;
|
|
case NEXTHOP_EVENT_DEL:
|
|
nsim_nexthop_remove(data, info);
|
|
break;
|
|
case NEXTHOP_EVENT_RES_TABLE_PRE_REPLACE:
|
|
err = nsim_nexthop_res_table_pre_replace(data, info);
|
|
break;
|
|
case NEXTHOP_EVENT_BUCKET_REPLACE:
|
|
err = nsim_nexthop_bucket_replace(data, info);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&data->nh_lock);
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
static void nsim_nexthop_free(void *ptr, void *arg)
|
|
{
|
|
struct nsim_nexthop *nexthop = ptr;
|
|
struct nsim_fib_data *data = arg;
|
|
struct net *net;
|
|
|
|
net = devlink_net(data->devlink);
|
|
nsim_nexthop_hw_flags_set(net, nexthop, false);
|
|
nsim_nexthop_account(data, nexthop->occ, false, NULL);
|
|
nsim_nexthop_destroy(nexthop);
|
|
}
|
|
|
|
static ssize_t nsim_nexthop_bucket_activity_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t size, loff_t *ppos)
|
|
{
|
|
struct nsim_fib_data *data = file->private_data;
|
|
struct net *net = devlink_net(data->devlink);
|
|
struct nsim_nexthop *nexthop;
|
|
unsigned long *activity;
|
|
loff_t pos = *ppos;
|
|
u16 bucket_index;
|
|
char buf[128];
|
|
int err = 0;
|
|
u32 nhid;
|
|
|
|
if (pos != 0)
|
|
return -EINVAL;
|
|
if (size > sizeof(buf))
|
|
return -EINVAL;
|
|
if (copy_from_user(buf, user_buf, size))
|
|
return -EFAULT;
|
|
if (sscanf(buf, "%u %hu", &nhid, &bucket_index) != 2)
|
|
return -EINVAL;
|
|
|
|
rtnl_lock();
|
|
|
|
nexthop = rhashtable_lookup_fast(&data->nexthop_ht, &nhid,
|
|
nsim_nexthop_ht_params);
|
|
if (!nexthop || !nexthop->is_resilient ||
|
|
bucket_index >= nexthop->occ) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
activity = bitmap_zalloc(nexthop->occ, GFP_KERNEL);
|
|
if (!activity) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
bitmap_set(activity, bucket_index, 1);
|
|
nexthop_res_grp_activity_update(net, nhid, nexthop->occ, activity);
|
|
bitmap_free(activity);
|
|
|
|
out:
|
|
rtnl_unlock();
|
|
|
|
*ppos = size;
|
|
return err ?: size;
|
|
}
|
|
|
|
static const struct file_operations nsim_nexthop_bucket_activity_fops = {
|
|
.open = simple_open,
|
|
.write = nsim_nexthop_bucket_activity_write,
|
|
.llseek = no_llseek,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
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)
|
|
{
|
|
static const 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 = devl_resource_size_get(devlink, res_ids[i], &val);
|
|
if (err)
|
|
val = (u64) -1;
|
|
nsim_fib_set_max(data, res_ids[i], val);
|
|
}
|
|
}
|
|
|
|
static void nsim_fib_event_work(struct work_struct *work)
|
|
{
|
|
struct nsim_fib_data *data = container_of(work, struct nsim_fib_data,
|
|
fib_event_work);
|
|
struct nsim_fib_event *fib_event, *next_fib_event;
|
|
|
|
LIST_HEAD(fib_event_queue);
|
|
|
|
spin_lock_bh(&data->fib_event_queue_lock);
|
|
list_splice_init(&data->fib_event_queue, &fib_event_queue);
|
|
spin_unlock_bh(&data->fib_event_queue_lock);
|
|
|
|
mutex_lock(&data->fib_lock);
|
|
list_for_each_entry_safe(fib_event, next_fib_event, &fib_event_queue,
|
|
list) {
|
|
nsim_fib_event(fib_event);
|
|
list_del(&fib_event->list);
|
|
kfree(fib_event);
|
|
cond_resched();
|
|
}
|
|
mutex_unlock(&data->fib_lock);
|
|
}
|
|
|
|
static void nsim_fib_flush_work(struct work_struct *work)
|
|
{
|
|
struct nsim_fib_data *data = container_of(work, struct nsim_fib_data,
|
|
fib_flush_work);
|
|
struct nsim_fib_rt *fib_rt, *fib_rt_tmp;
|
|
|
|
/* Process pending work. */
|
|
flush_work(&data->fib_event_work);
|
|
|
|
mutex_lock(&data->fib_lock);
|
|
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);
|
|
}
|
|
mutex_unlock(&data->fib_lock);
|
|
}
|
|
|
|
static int
|
|
nsim_fib_debugfs_init(struct nsim_fib_data *data, struct nsim_dev *nsim_dev)
|
|
{
|
|
data->ddir = debugfs_create_dir("fib", nsim_dev->ddir);
|
|
if (IS_ERR(data->ddir))
|
|
return PTR_ERR(data->ddir);
|
|
|
|
data->fail_route_offload = false;
|
|
debugfs_create_bool("fail_route_offload", 0600, data->ddir,
|
|
&data->fail_route_offload);
|
|
|
|
data->fail_res_nexthop_group_replace = false;
|
|
debugfs_create_bool("fail_res_nexthop_group_replace", 0600, data->ddir,
|
|
&data->fail_res_nexthop_group_replace);
|
|
|
|
data->fail_nexthop_bucket_replace = false;
|
|
debugfs_create_bool("fail_nexthop_bucket_replace", 0600, data->ddir,
|
|
&data->fail_nexthop_bucket_replace);
|
|
|
|
debugfs_create_file("nexthop_bucket_activity", 0200, data->ddir,
|
|
data, &nsim_nexthop_bucket_activity_fops);
|
|
|
|
data->fail_route_delete = false;
|
|
debugfs_create_bool("fail_route_delete", 0600, data->ddir,
|
|
&data->fail_route_delete);
|
|
return 0;
|
|
}
|
|
|
|
static void nsim_fib_debugfs_exit(struct nsim_fib_data *data)
|
|
{
|
|
debugfs_remove_recursive(data->ddir);
|
|
}
|
|
|
|
struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_fib_data *data;
|
|
struct nsim_dev *nsim_dev;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return ERR_PTR(-ENOMEM);
|
|
data->devlink = devlink;
|
|
|
|
nsim_dev = devlink_priv(devlink);
|
|
err = nsim_fib_debugfs_init(data, nsim_dev);
|
|
if (err)
|
|
goto err_data_free;
|
|
|
|
mutex_init(&data->nh_lock);
|
|
err = rhashtable_init(&data->nexthop_ht, &nsim_nexthop_ht_params);
|
|
if (err)
|
|
goto err_debugfs_exit;
|
|
|
|
mutex_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_rhashtable_nexthop_destroy;
|
|
|
|
INIT_WORK(&data->fib_event_work, nsim_fib_event_work);
|
|
INIT_WORK(&data->fib_flush_work, nsim_fib_flush_work);
|
|
INIT_LIST_HEAD(&data->fib_event_queue);
|
|
spin_lock_init(&data->fib_event_queue_lock);
|
|
|
|
nsim_fib_set_max_all(data, devlink);
|
|
|
|
data->nexthop_nb.notifier_call = nsim_nexthop_event_nb;
|
|
err = register_nexthop_notifier(devlink_net(devlink), &data->nexthop_nb,
|
|
extack);
|
|
if (err) {
|
|
pr_err("Failed to register nexthop notifier\n");
|
|
goto err_rhashtable_fib_destroy;
|
|
}
|
|
|
|
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_nexthop_nb_unregister;
|
|
}
|
|
|
|
devl_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB,
|
|
nsim_fib_ipv4_resource_occ_get,
|
|
data);
|
|
devl_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB_RULES,
|
|
nsim_fib_ipv4_rules_res_occ_get,
|
|
data);
|
|
devl_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB,
|
|
nsim_fib_ipv6_resource_occ_get,
|
|
data);
|
|
devl_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB_RULES,
|
|
nsim_fib_ipv6_rules_res_occ_get,
|
|
data);
|
|
devl_resource_occ_get_register(devlink,
|
|
NSIM_RESOURCE_NEXTHOPS,
|
|
nsim_fib_nexthops_res_occ_get,
|
|
data);
|
|
return data;
|
|
|
|
err_nexthop_nb_unregister:
|
|
unregister_nexthop_notifier(devlink_net(devlink), &data->nexthop_nb);
|
|
err_rhashtable_fib_destroy:
|
|
cancel_work_sync(&data->fib_flush_work);
|
|
flush_work(&data->fib_event_work);
|
|
rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free,
|
|
data);
|
|
err_rhashtable_nexthop_destroy:
|
|
rhashtable_free_and_destroy(&data->nexthop_ht, nsim_nexthop_free,
|
|
data);
|
|
mutex_destroy(&data->fib_lock);
|
|
err_debugfs_exit:
|
|
mutex_destroy(&data->nh_lock);
|
|
nsim_fib_debugfs_exit(data);
|
|
err_data_free:
|
|
kfree(data);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *data)
|
|
{
|
|
devl_resource_occ_get_unregister(devlink,
|
|
NSIM_RESOURCE_NEXTHOPS);
|
|
devl_resource_occ_get_unregister(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB_RULES);
|
|
devl_resource_occ_get_unregister(devlink,
|
|
NSIM_RESOURCE_IPV6_FIB);
|
|
devl_resource_occ_get_unregister(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB_RULES);
|
|
devl_resource_occ_get_unregister(devlink,
|
|
NSIM_RESOURCE_IPV4_FIB);
|
|
unregister_fib_notifier(devlink_net(devlink), &data->fib_nb);
|
|
unregister_nexthop_notifier(devlink_net(devlink), &data->nexthop_nb);
|
|
cancel_work_sync(&data->fib_flush_work);
|
|
flush_work(&data->fib_event_work);
|
|
rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free,
|
|
data);
|
|
rhashtable_free_and_destroy(&data->nexthop_ht, nsim_nexthop_free,
|
|
data);
|
|
WARN_ON_ONCE(!list_empty(&data->fib_event_queue));
|
|
WARN_ON_ONCE(!list_empty(&data->fib_rt_list));
|
|
mutex_destroy(&data->fib_lock);
|
|
mutex_destroy(&data->nh_lock);
|
|
nsim_fib_debugfs_exit(data);
|
|
kfree(data);
|
|
}
|