/*
* Copyright (c) 2018 Cumulus Networks. All rights reserved.
* Copyright (c) 2018 David Ahern <[email protected]>
*
* This software is licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree.
*
* THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
* OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
*/
#include <linux/bitmap.h>
#include <linux/in6.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/rhashtable.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
#include <net/fib_notifier.h>
#include <net/inet_dscp.h>
#include <net/ip_fib.h>
#include <net/ip6_fib.h>
#include <net/fib_rules.h>
#include <net/net_namespace.h>
#include <net/nexthop.h>
#include <linux/debugfs.h>
#include "netdevsim.h"
struct nsim_fib_entry {
u64 max;
atomic64_t num;
};
struct nsim_per_fib_data {
struct nsim_fib_entry fib;
struct nsim_fib_entry rules;
};
struct nsim_fib_data {
struct notifier_block fib_nb;
struct nsim_per_fib_data ipv4;
struct nsim_per_fib_data ipv6;
struct nsim_fib_entry nexthops;
struct rhashtable fib_rt_ht;
struct list_head fib_rt_list;
struct mutex fib_lock; /* Protects FIB HT and list */
struct notifier_block nexthop_nb;
struct rhashtable nexthop_ht;
struct devlink *devlink;
struct work_struct fib_event_work;
struct work_struct fib_flush_work;
struct list_head fib_event_queue;
spinlock_t fib_event_queue_lock; /* Protects fib event queue list */
struct mutex nh_lock; /* Protects NH HT */
struct dentry *ddir;
bool fail_route_offload;
bool fail_res_nexthop_group_replace;
bool fail_nexthop_bucket_replace;
bool fail_route_delete;
};
struct nsim_fib_rt_key {
unsigned char addr[sizeof(struct in6_addr)];
unsigned char prefix_len;
int family;
u32 tb_id;
};
struct nsim_fib_rt {
struct nsim_fib_rt_key key;
struct rhash_head ht_node;
struct list_head list; /* Member of fib_rt_list */
};
struct nsim_fib4_rt {
struct nsim_fib_rt common;
struct fib_info *fi;
dscp_t dscp;
u8 type;
};
struct nsim_fib6_rt {
struct nsim_fib_rt common;
struct list_head nh_list;
unsigned int nhs;
};
struct nsim_fib6_rt_nh {
struct list_head list; /* Member of nh_list */
struct fib6_info *rt;
};
struct nsim_fib6_event {
struct fib6_info **rt_arr;
unsigned int nrt6;
};
struct nsim_fib_event {
struct list_head list; /* node in fib queue */
union {
struct fib_entry_notifier_info fen_info;
struct nsim_fib6_event fib6_event;
};
struct nsim_fib_data *data;
unsigned long event;
int family;
};
static const struct rhashtable_params nsim_fib_rt_ht_params = {
.key_offset = offsetof(struct nsim_fib_rt, key),
.head_offset = offsetof(struct nsim_fib_rt, ht_node),
.key_len = sizeof(struct nsim_fib_rt_key),
.automatic_shrinking = true,
};
struct nsim_nexthop {
struct rhash_head ht_node;
u64 occ;
u32 id;
bool is_resilient;
};
static const struct rhashtable_params nsim_nexthop_ht_params = {
.key_offset = offsetof(struct nsim_nexthop, id),
.head_offset = offsetof(struct nsim_nexthop, ht_node),
.key_len = sizeof(u32),
.automatic_shrinking = true,
};
u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
enum nsim_resource_id res_id, bool max)
{
struct nsim_fib_entry *entry;
switch (res_id) {
case NSIM_RESOURCE_IPV4_FIB:
entry = &fib_data->ipv4.fib;
break;
case NSIM_RESOURCE_IPV4_FIB_RULES:
entry = &fib_data->ipv4.rules;
break;
case NSIM_RESOURCE_IPV6_FIB:
entry = &fib_data->ipv6.fib;
break;
case NSIM_RESOURCE_IPV6_FIB_RULES:
entry = &fib_data->ipv6.rules;
break;
case NSIM_RESOURCE_NEXTHOPS:
entry = &fib_data->nexthops;
break;
default:
return 0;
}
return max ? entry->max : atomic64_read(&entry->num);
}
static void nsim_fib_set_max(struct nsim_fib_data *fib_data,
enum nsim_resource_id res_id, u64 val)
{
struct nsim_fib_entry *entry;
switch (res_id) {
case NSIM_RESOURCE_IPV4_FIB:
entry = &fib_data->ipv4.fib;
break;
case NSIM_RESOURCE_IPV4_FIB_RULES:
entry = &fib_data->ipv4.rules;
break;
case NSIM_RESOURCE_IPV6_FIB:
entry = &fib_data->ipv6.fib;
break;
case NSIM_RESOURCE_IPV6_FIB_RULES:
entry = &fib_data->ipv6.rules;
break;
case NSIM_RESOURCE_NEXTHOPS:
entry = &fib_data->nexthops;
break;
default:
WARN_ON(1);
return;
}
entry->max = val;
}
static int nsim_fib_rule_account(struct nsim_fib_entry *entry, bool add,
struct netlink_ext_ack *extack)
{
int err = 0;
if (add) {
if (!atomic64_add_unless(&entry->num, 1, entry->max)) {
err = -ENOSPC;
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported fib rule entries");
}
} else {
atomic64_dec_if_positive(&entry->num);
}
return err;
}
static int nsim_fib_rule_event(struct nsim_fib_data *data,
struct fib_notifier_info *info, bool add)
{
struct netlink_ext_ack *extack = info->extack;
int err = 0;
switch (info->family) {
case AF_INET:
err = nsim_fib_rule_account(&data->ipv4.rules, add, extack);
break;
case AF_INET6:
err = nsim_fib_rule_account(&data->ipv6.rules, add, extack);
break;
}
return err;
}
static int nsim_fib_account(struct nsim_fib_entry *entry, bool add)
{
int err = 0;
if (add) {
if (!atomic64_add_unless(&entry->num, 1, entry->max))
err = -ENOSPC;
} else {
atomic64_dec_if_positive(&entry->num);
}
return err;
}
static void nsim_fib_rt_init(struct nsim_fib_data *data,
struct nsim_fib_rt *fib_rt, const void *addr,
size_t addr_len, unsigned int prefix_len,
int family, u32 tb_id)
{
memcpy(fib_rt->key.addr, addr, addr_len);
fib_rt->key.prefix_len = prefix_len;
fib_rt->key.family = family;
fib_rt->key.tb_id = tb_id;
list_add(&fib_rt->list, &data->fib_rt_list);
}
static void nsim_fib_rt_fini(struct nsim_fib_rt *fib_rt)
{
list_del(&fib_rt->list);
}
static struct nsim_fib_rt *nsim_fib_rt_lookup(struct rhashtable *fib_rt_ht,
const void *addr, size_t addr_len,
unsigned int prefix_len,
int family, u32 tb_id)
{
struct nsim_fib_rt_key key;
memset(&key, 0, sizeof(key));
memcpy(key.addr, addr, addr_len);
key.prefix_len = prefix_len;
key.family = family;
key.tb_id = tb_id;
return rhashtable_lookup_fast(fib_rt_ht, &key, nsim_fib_rt_ht_params);
}
static struct nsim_fib4_rt *
nsim_fib4_rt_create(struct nsim_fib_data *data,
struct fib_entry_notifier_info *fen_info)
{
struct nsim_fib4_rt *fib4_rt;
fib4_rt = kzalloc(sizeof(*fib4_rt), GFP_KERNEL);
if (!fib4_rt)
return NULL;
nsim_fib_rt_init(data, &fib4_rt->common, &fen_info->dst, sizeof(u32),
fen_info->dst_len, AF_INET, fen_info->tb_id);
fib4_rt->fi = fen_info->fi;
fib_info_hold(fib4_rt->fi);
fib4_rt->dscp = fen_info->dscp;
fib4_rt->type = fen_info->type;
return fib4_rt;
}
static void nsim_fib4_rt_destroy(struct nsim_fib4_rt *fib4_rt)
{
fib_info_put(fib4_rt->fi);
nsim_fib_rt_fini(&fib4_rt->common);
kfree(fib4_rt);
}
static struct nsim_fib4_rt *
nsim_fib4_rt_lookup(struct rhashtable *fib_rt_ht,
const struct fib_entry_notifier_info *fen_info)
{
struct nsim_fib_rt *fib_rt;
fib_rt = nsim_fib_rt_lookup(fib_rt_ht, &fen_info->dst, sizeof(u32),
fen_info->dst_len, AF_INET,
fen_info->tb_id);
if (!fib_rt)
return NULL;
return container_of(fib_rt, struct nsim_fib4_rt, common);
}
static void
nsim_fib4_rt_offload_failed_flag_set(struct net *net,
struct fib_entry_notifier_info *fen_info)
{
u32 *p_dst = (u32 *)&fen_info->dst;
struct fib_rt_info fri;
fri.fi = fen_info->fi;
fri.tb_id = fen_info->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = fen_info->dst_len;
fri.dscp = fen_info->dscp;
fri.type = fen_info->type;
fri.offload = false;
fri.trap = false;
fri.offload_failed = true;
fib_alias_hw_flags_set(net, &fri);
}
static void nsim_fib4_rt_hw_flags_set(struct net *net,
const struct nsim_fib4_rt *fib4_rt,
bool trap)
{
u32 *p_dst = (u32 *) fib4_rt->common.key.addr;
int dst_len = fib4_rt->common.key.prefix_len;
struct fib_rt_info fri;
fri.fi = fib4_rt->fi;
fri.tb_id = fib4_rt->common.key.tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = dst_len;
fri.dscp = fib4_rt->dscp;
fri.type = fib4_rt->type;
fri.offload = false;
fri.trap = trap;
fri.offload_failed = false;
fib_alias_hw_flags_set(net, &fri);
}
static int nsim_fib4_rt_add(struct nsim_fib_data *data,
struct nsim_fib4_rt *fib4_rt)
{
struct net *net = devlink_net(data->devlink);
int err;
err = rhashtable_insert_fast(&data->fib_rt_ht,
&fib4_rt->common.ht_node,
nsim_fib_rt_ht_params);
if (err)
goto err_fib_dismiss;
/* Simulate hardware programming latency. */
msleep(1);
nsim_fib4_rt_hw_flags_set(net, fib4_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->ipv4.fib, false);
return err;
}
static int nsim_fib4_rt_replace(struct nsim_fib_data *data,
struct nsim_fib4_rt *fib4_rt,
struct nsim_fib4_rt *fib4_rt_old)
{
struct net *net = devlink_net(data->devlink);
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->ipv4.fib, false);
if (err)
return err;
err = rhashtable_replace_fast(&data->fib_rt_ht,
&fib4_rt_old->common.ht_node,
&fib4_rt->common.ht_node,
nsim_fib_rt_ht_params);
if (err)
return err;
msleep(1);
nsim_fib4_rt_hw_flags_set(net, fib4_rt, true);
nsim_fib4_rt_hw_flags_set(net, fib4_rt_old, false);
nsim_fib4_rt_destroy(fib4_rt_old);
return 0;
}
static int nsim_fib4_rt_insert(struct nsim_fib_data *data,
struct fib_entry_notifier_info *fen_info)
{
struct nsim_fib4_rt *fib4_rt, *fib4_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;
}
fib4_rt = nsim_fib4_rt_create(data, fen_info);
if (!fib4_rt)
return -ENOMEM;
fib4_rt_old = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info);
if (!fib4_rt_old)
err = nsim_fib4_rt_add(data, fib4_rt);
else
err = nsim_fib4_rt_replace(data, fib4_rt, fib4_rt_old);
if (err)
nsim_fib4_rt_destroy(fib4_rt);
return err;
}
static void nsim_fib4_rt_remove(struct nsim_fib_data *data,
const struct fib_entry_notifier_info *fen_info)
{
struct nsim_fib4_rt *fib4_rt;
fib4_rt = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info);
if (!fib4_rt)
return;
rhashtable_remove_fast(&data->fib_rt_ht, &fib4_rt->common.ht_node,
nsim_fib_rt_ht_params);
nsim_fib4_rt_destroy(fib4_rt);
}
static int nsim_fib4_event(struct nsim_fib_data *data,
struct fib_entry_notifier_info *fen_info,
unsigned long event)
{
int err = 0;
switch (event) {
case FIB_EVENT_ENTRY_REPLACE:
err = nsim_fib4_rt_insert(data, fen_info);
if (err) {
struct net *net = devlink_net(data->devlink);
nsim_fib4_rt_offload_failed_flag_set(net, fen_info);
}
break;
case FIB_EVENT_ENTRY_DEL:
nsim_fib4_rt_remove(data, fen_info);
break;
default:
break;
}
return err;
}
static struct nsim_fib6_rt_nh *
nsim_fib6_rt_nh_find(const struct nsim_fib6_rt *fib6_rt,
const struct fib6_info *rt)
{
struct nsim_fib6_rt_nh *fib6_rt_nh;
list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list) {
if (fib6_rt_nh->rt == rt)
return fib6_rt_nh;
}
return NULL;
}
static int nsim_fib6_rt_nh_add(struct nsim_fib6_rt *fib6_rt,
struct fib6_info *rt)
{
struct nsim_fib6_rt_nh *fib6_rt_nh;
fib6_rt_nh = kzalloc(sizeof(*fib6_rt_nh), GFP_KERNEL);
if (!fib6_rt_nh)
return -ENOMEM;
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,
.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);
}
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