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OpenCloudOS-Kernel/net/devlink/trap.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
*/
#include <trace/events/devlink.h>
#include "devl_internal.h"
struct devlink_stats {
u64_stats_t rx_bytes;
u64_stats_t rx_packets;
struct u64_stats_sync syncp;
};
/**
* struct devlink_trap_policer_item - Packet trap policer attributes.
* @policer: Immutable packet trap policer attributes.
* @rate: Rate in packets / sec.
* @burst: Burst size in packets.
* @list: trap_policer_list member.
*
* Describes packet trap policer attributes. Created by devlink during trap
* policer registration.
*/
struct devlink_trap_policer_item {
const struct devlink_trap_policer *policer;
u64 rate;
u64 burst;
struct list_head list;
};
/**
* struct devlink_trap_group_item - Packet trap group attributes.
* @group: Immutable packet trap group attributes.
* @policer_item: Associated policer item. Can be NULL.
* @list: trap_group_list member.
* @stats: Trap group statistics.
*
* Describes packet trap group attributes. Created by devlink during trap
* group registration.
*/
struct devlink_trap_group_item {
const struct devlink_trap_group *group;
struct devlink_trap_policer_item *policer_item;
struct list_head list;
struct devlink_stats __percpu *stats;
};
/**
* struct devlink_trap_item - Packet trap attributes.
* @trap: Immutable packet trap attributes.
* @group_item: Associated group item.
* @list: trap_list member.
* @action: Trap action.
* @stats: Trap statistics.
* @priv: Driver private information.
*
* Describes both mutable and immutable packet trap attributes. Created by
* devlink during trap registration and used for all trap related operations.
*/
struct devlink_trap_item {
const struct devlink_trap *trap;
struct devlink_trap_group_item *group_item;
struct list_head list;
enum devlink_trap_action action;
struct devlink_stats __percpu *stats;
void *priv;
};
static struct devlink_trap_policer_item *
devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
{
struct devlink_trap_policer_item *policer_item;
list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
if (policer_item->policer->id == id)
return policer_item;
}
return NULL;
}
static struct devlink_trap_item *
devlink_trap_item_lookup(struct devlink *devlink, const char *name)
{
struct devlink_trap_item *trap_item;
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (!strcmp(trap_item->trap->name, name))
return trap_item;
}
return NULL;
}
static struct devlink_trap_item *
devlink_trap_item_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
struct nlattr *attr;
if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
return NULL;
attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
return devlink_trap_item_lookup(devlink, nla_data(attr));
}
static int
devlink_trap_action_get_from_info(struct genl_info *info,
enum devlink_trap_action *p_trap_action)
{
u8 val;
val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
switch (val) {
case DEVLINK_TRAP_ACTION_DROP:
case DEVLINK_TRAP_ACTION_TRAP:
case DEVLINK_TRAP_ACTION_MIRROR:
*p_trap_action = val;
break;
default:
return -EINVAL;
}
return 0;
}
static int devlink_trap_metadata_put(struct sk_buff *msg,
const struct devlink_trap *trap)
{
struct nlattr *attr;
attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
if (!attr)
return -EMSGSIZE;
if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
goto nla_put_failure;
if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
struct devlink_stats *stats)
{
int i;
memset(stats, 0, sizeof(*stats));
for_each_possible_cpu(i) {
struct devlink_stats *cpu_stats;
u64 rx_packets, rx_bytes;
unsigned int start;
cpu_stats = per_cpu_ptr(trap_stats, i);
do {
start = u64_stats_fetch_begin(&cpu_stats->syncp);
rx_packets = u64_stats_read(&cpu_stats->rx_packets);
rx_bytes = u64_stats_read(&cpu_stats->rx_bytes);
} while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
u64_stats_add(&stats->rx_packets, rx_packets);
u64_stats_add(&stats->rx_bytes, rx_bytes);
}
}
static int
devlink_trap_group_stats_put(struct sk_buff *msg,
struct devlink_stats __percpu *trap_stats)
{
struct devlink_stats stats;
struct nlattr *attr;
devlink_trap_stats_read(trap_stats, &stats);
attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
if (!attr)
return -EMSGSIZE;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
u64_stats_read(&stats.rx_packets),
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
u64_stats_read(&stats.rx_bytes),
DEVLINK_ATTR_PAD))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static int devlink_trap_stats_put(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_item *trap_item)
{
struct devlink_stats stats;
struct nlattr *attr;
u64 drops = 0;
int err;
if (devlink->ops->trap_drop_counter_get) {
err = devlink->ops->trap_drop_counter_get(devlink,
trap_item->trap,
&drops);
if (err)
return err;
}
devlink_trap_stats_read(trap_item->stats, &stats);
attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
if (!attr)
return -EMSGSIZE;
if (devlink->ops->trap_drop_counter_get &&
nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
u64_stats_read(&stats.rx_packets),
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
u64_stats_read(&stats.rx_bytes),
DEVLINK_ATTR_PAD))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd, u32 portid, u32 seq,
int flags)
{
struct devlink_trap_group_item *group_item = trap_item->group_item;
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
group_item->group->name))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
goto nla_put_failure;
if (trap_item->trap->generic &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
goto nla_put_failure;
err = devlink_trap_metadata_put(msg, trap_item->trap);
if (err)
goto nla_put_failure;
err = devlink_trap_stats_put(msg, devlink, trap_item);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
int devlink_nl_trap_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_item *trap_item;
struct sk_buff *msg;
int err;
if (list_empty(&devlink->trap_list))
return -EOPNOTSUPP;
trap_item = devlink_trap_item_get_from_info(devlink, info);
if (!trap_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap");
return -ENOENT;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_trap_fill(msg, devlink, trap_item,
DEVLINK_CMD_TRAP_NEW, info->snd_portid,
info->snd_seq, 0);
if (err)
goto err_trap_fill;
return genlmsg_reply(msg, info);
err_trap_fill:
nlmsg_free(msg);
return err;
}
static int devlink_nl_trap_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb, int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_trap_item *trap_item;
int idx = 0;
int err = 0;
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (idx < state->idx) {
idx++;
continue;
}
err = devlink_nl_trap_fill(msg, devlink, trap_item,
DEVLINK_CMD_TRAP_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags);
if (err) {
state->idx = idx;
break;
}
idx++;
}
return err;
}
int devlink_nl_trap_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_trap_get_dump_one);
}
static int __devlink_trap_action_set(struct devlink *devlink,
struct devlink_trap_item *trap_item,
enum devlink_trap_action trap_action,
struct netlink_ext_ack *extack)
{
int err;
if (trap_item->action != trap_action &&
trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
NL_SET_ERR_MSG(extack, "Cannot change action of non-drop traps. Skipping");
return 0;
}
err = devlink->ops->trap_action_set(devlink, trap_item->trap,
trap_action, extack);
if (err)
return err;
trap_item->action = trap_action;
return 0;
}
static int devlink_trap_action_set(struct devlink *devlink,
struct devlink_trap_item *trap_item,
struct genl_info *info)
{
enum devlink_trap_action trap_action;
int err;
if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
return 0;
err = devlink_trap_action_get_from_info(info, &trap_action);
if (err) {
NL_SET_ERR_MSG(info->extack, "Invalid trap action");
return -EINVAL;
}
return __devlink_trap_action_set(devlink, trap_item, trap_action,
info->extack);
}
int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb, struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_item *trap_item;
if (list_empty(&devlink->trap_list))
return -EOPNOTSUPP;
trap_item = devlink_trap_item_get_from_info(devlink, info);
if (!trap_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap");
return -ENOENT;
}
return devlink_trap_action_set(devlink, trap_item, info);
}
static struct devlink_trap_group_item *
devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
{
struct devlink_trap_group_item *group_item;
list_for_each_entry(group_item, &devlink->trap_group_list, list) {
if (!strcmp(group_item->group->name, name))
return group_item;
}
return NULL;
}
static struct devlink_trap_group_item *
devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
{
struct devlink_trap_group_item *group_item;
list_for_each_entry(group_item, &devlink->trap_group_list, list) {
if (group_item->group->id == id)
return group_item;
}
return NULL;
}
static struct devlink_trap_group_item *
devlink_trap_group_item_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
char *name;
if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
return NULL;
name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
return devlink_trap_group_item_lookup(devlink, name);
}
static int
devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_group_item *group_item,
enum devlink_command cmd, u32 portid, u32 seq,
int flags)
{
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
group_item->group->name))
goto nla_put_failure;
if (group_item->group->generic &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
goto nla_put_failure;
if (group_item->policer_item &&
nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
group_item->policer_item->policer->id))
goto nla_put_failure;
err = devlink_trap_group_stats_put(msg, group_item->stats);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
int devlink_nl_trap_group_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_group_item *group_item;
struct sk_buff *msg;
int err;
if (list_empty(&devlink->trap_group_list))
return -EOPNOTSUPP;
group_item = devlink_trap_group_item_get_from_info(devlink, info);
if (!group_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap group");
return -ENOENT;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_trap_group_fill(msg, devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW,
info->snd_portid, info->snd_seq, 0);
if (err)
goto err_trap_group_fill;
return genlmsg_reply(msg, info);
err_trap_group_fill:
nlmsg_free(msg);
return err;
}
static int devlink_nl_trap_group_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_trap_group_item *group_item;
int idx = 0;
int err = 0;
list_for_each_entry(group_item, &devlink->trap_group_list, list) {
if (idx < state->idx) {
idx++;
continue;
}
err = devlink_nl_trap_group_fill(msg, devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags);
if (err) {
state->idx = idx;
break;
}
idx++;
}
return err;
}
int devlink_nl_trap_group_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_trap_group_get_dump_one);
}
static int
__devlink_trap_group_action_set(struct devlink *devlink,
struct devlink_trap_group_item *group_item,
enum devlink_trap_action trap_action,
struct netlink_ext_ack *extack)
{
const char *group_name = group_item->group->name;
struct devlink_trap_item *trap_item;
int err;
if (devlink->ops->trap_group_action_set) {
err = devlink->ops->trap_group_action_set(devlink, group_item->group,
trap_action, extack);
if (err)
return err;
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (strcmp(trap_item->group_item->group->name, group_name))
continue;
if (trap_item->action != trap_action &&
trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP)
continue;
trap_item->action = trap_action;
}
return 0;
}
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (strcmp(trap_item->group_item->group->name, group_name))
continue;
err = __devlink_trap_action_set(devlink, trap_item,
trap_action, extack);
if (err)
return err;
}
return 0;
}
static int
devlink_trap_group_action_set(struct devlink *devlink,
struct devlink_trap_group_item *group_item,
struct genl_info *info, bool *p_modified)
{
enum devlink_trap_action trap_action;
int err;
if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
return 0;
err = devlink_trap_action_get_from_info(info, &trap_action);
if (err) {
NL_SET_ERR_MSG(info->extack, "Invalid trap action");
return -EINVAL;
}
err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
info->extack);
if (err)
return err;
*p_modified = true;
return 0;
}
static int devlink_trap_group_set(struct devlink *devlink,
struct devlink_trap_group_item *group_item,
struct genl_info *info)
{
struct devlink_trap_policer_item *policer_item;
struct netlink_ext_ack *extack = info->extack;
const struct devlink_trap_policer *policer;
struct nlattr **attrs = info->attrs;
u32 policer_id;
int err;
if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
return 0;
if (!devlink->ops->trap_group_set)
return -EOPNOTSUPP;
policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
if (policer_id && !policer_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap policer");
return -ENOENT;
}
policer = policer_item ? policer_item->policer : NULL;
err = devlink->ops->trap_group_set(devlink, group_item->group, policer,
extack);
if (err)
return err;
group_item->policer_item = policer_item;
return 0;
}
int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_group_item *group_item;
bool modified = false;
int err;
if (list_empty(&devlink->trap_group_list))
return -EOPNOTSUPP;
group_item = devlink_trap_group_item_get_from_info(devlink, info);
if (!group_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap group");
return -ENOENT;
}
err = devlink_trap_group_action_set(devlink, group_item, info,
&modified);
if (err)
return err;
err = devlink_trap_group_set(devlink, group_item, info);
if (err)
goto err_trap_group_set;
return 0;
err_trap_group_set:
if (modified)
NL_SET_ERR_MSG(extack, "Trap group set failed, but some changes were committed already");
return err;
}
static struct devlink_trap_policer_item *
devlink_trap_policer_item_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
u32 id;
if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
return NULL;
id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
return devlink_trap_policer_item_lookup(devlink, id);
}
static int
devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_policer *policer)
{
struct nlattr *attr;
u64 drops;
int err;
if (!devlink->ops->trap_policer_counter_get)
return 0;
err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
if (err)
return err;
attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
if (!attr)
return -EMSGSIZE;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static int
devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_policer_item *policer_item,
enum devlink_command cmd, u32 portid, u32 seq,
int flags)
{
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
policer_item->policer->id))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
policer_item->rate, DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
policer_item->burst, DEVLINK_ATTR_PAD))
goto nla_put_failure;
err = devlink_trap_policer_stats_put(msg, devlink,
policer_item->policer);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
int devlink_nl_trap_policer_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_trap_policer_item *policer_item;
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct sk_buff *msg;
int err;
if (list_empty(&devlink->trap_policer_list))
return -EOPNOTSUPP;
policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
if (!policer_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap policer");
return -ENOENT;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_NEW,
info->snd_portid, info->snd_seq, 0);
if (err)
goto err_trap_policer_fill;
return genlmsg_reply(msg, info);
err_trap_policer_fill:
nlmsg_free(msg);
return err;
}
static int devlink_nl_trap_policer_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_trap_policer_item *policer_item;
int idx = 0;
int err = 0;
list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
if (idx < state->idx) {
idx++;
continue;
}
err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags);
if (err) {
state->idx = idx;
break;
}
idx++;
}
return err;
}
int devlink_nl_trap_policer_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_trap_policer_get_dump_one);
}
static int
devlink_trap_policer_set(struct devlink *devlink,
struct devlink_trap_policer_item *policer_item,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct nlattr **attrs = info->attrs;
u64 rate, burst;
int err;
rate = policer_item->rate;
burst = policer_item->burst;
if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
if (rate < policer_item->policer->min_rate) {
NL_SET_ERR_MSG(extack, "Policer rate lower than limit");
return -EINVAL;
}
if (rate > policer_item->policer->max_rate) {
NL_SET_ERR_MSG(extack, "Policer rate higher than limit");
return -EINVAL;
}
if (burst < policer_item->policer->min_burst) {
NL_SET_ERR_MSG(extack, "Policer burst size lower than limit");
return -EINVAL;
}
if (burst > policer_item->policer->max_burst) {
NL_SET_ERR_MSG(extack, "Policer burst size higher than limit");
return -EINVAL;
}
err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
rate, burst, info->extack);
if (err)
return err;
policer_item->rate = rate;
policer_item->burst = burst;
return 0;
}
int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_trap_policer_item *policer_item;
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
if (list_empty(&devlink->trap_policer_list))
return -EOPNOTSUPP;
if (!devlink->ops->trap_policer_set)
return -EOPNOTSUPP;
policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
if (!policer_item) {
NL_SET_ERR_MSG(extack, "Device did not register this trap policer");
return -ENOENT;
}
return devlink_trap_policer_set(devlink, policer_item, info);
}
#define DEVLINK_TRAP(_id, _type) \
{ \
.type = DEVLINK_TRAP_TYPE_##_type, \
.id = DEVLINK_TRAP_GENERIC_ID_##_id, \
.name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
}
static const struct devlink_trap devlink_trap_generic[] = {
DEVLINK_TRAP(SMAC_MC, DROP),
DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
DEVLINK_TRAP(TAIL_DROP, DROP),
DEVLINK_TRAP(NON_IP_PACKET, DROP),
DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
DEVLINK_TRAP(DIP_LB, DROP),
DEVLINK_TRAP(SIP_MC, DROP),
DEVLINK_TRAP(SIP_LB, DROP),
DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
DEVLINK_TRAP(IPV4_SIP_BC, DROP),
DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
DEVLINK_TRAP(RPF, EXCEPTION),
DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
DEVLINK_TRAP(NON_ROUTABLE, DROP),
DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
DEVLINK_TRAP(STP, CONTROL),
DEVLINK_TRAP(LACP, CONTROL),
DEVLINK_TRAP(LLDP, CONTROL),
DEVLINK_TRAP(IGMP_QUERY, CONTROL),
DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL),
DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL),
DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL),
DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL),
DEVLINK_TRAP(MLD_QUERY, CONTROL),
DEVLINK_TRAP(MLD_V1_REPORT, CONTROL),
DEVLINK_TRAP(MLD_V2_REPORT, CONTROL),
DEVLINK_TRAP(MLD_V1_DONE, CONTROL),
DEVLINK_TRAP(IPV4_DHCP, CONTROL),
DEVLINK_TRAP(IPV6_DHCP, CONTROL),
DEVLINK_TRAP(ARP_REQUEST, CONTROL),
DEVLINK_TRAP(ARP_RESPONSE, CONTROL),
DEVLINK_TRAP(ARP_OVERLAY, CONTROL),
DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL),
DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL),
DEVLINK_TRAP(IPV4_BFD, CONTROL),
DEVLINK_TRAP(IPV6_BFD, CONTROL),
DEVLINK_TRAP(IPV4_OSPF, CONTROL),
DEVLINK_TRAP(IPV6_OSPF, CONTROL),
DEVLINK_TRAP(IPV4_BGP, CONTROL),
DEVLINK_TRAP(IPV6_BGP, CONTROL),
DEVLINK_TRAP(IPV4_VRRP, CONTROL),
DEVLINK_TRAP(IPV6_VRRP, CONTROL),
DEVLINK_TRAP(IPV4_PIM, CONTROL),
DEVLINK_TRAP(IPV6_PIM, CONTROL),
DEVLINK_TRAP(UC_LB, CONTROL),
DEVLINK_TRAP(LOCAL_ROUTE, CONTROL),
DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL),
DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL),
DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL),
DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL),
DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL),
DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL),
DEVLINK_TRAP(IPV6_REDIRECT, CONTROL),
DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL),
DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL),
DEVLINK_TRAP(PTP_EVENT, CONTROL),
DEVLINK_TRAP(PTP_GENERAL, CONTROL),
DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL),
DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL),
DEVLINK_TRAP(EARLY_DROP, DROP),
DEVLINK_TRAP(VXLAN_PARSING, DROP),
DEVLINK_TRAP(LLC_SNAP_PARSING, DROP),
DEVLINK_TRAP(VLAN_PARSING, DROP),
DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP),
DEVLINK_TRAP(MPLS_PARSING, DROP),
DEVLINK_TRAP(ARP_PARSING, DROP),
DEVLINK_TRAP(IP_1_PARSING, DROP),
DEVLINK_TRAP(IP_N_PARSING, DROP),
DEVLINK_TRAP(GRE_PARSING, DROP),
DEVLINK_TRAP(UDP_PARSING, DROP),
DEVLINK_TRAP(TCP_PARSING, DROP),
DEVLINK_TRAP(IPSEC_PARSING, DROP),
DEVLINK_TRAP(SCTP_PARSING, DROP),
DEVLINK_TRAP(DCCP_PARSING, DROP),
DEVLINK_TRAP(GTP_PARSING, DROP),
DEVLINK_TRAP(ESP_PARSING, DROP),
DEVLINK_TRAP(BLACKHOLE_NEXTHOP, DROP),
DEVLINK_TRAP(DMAC_FILTER, DROP),
DEVLINK_TRAP(EAPOL, CONTROL),
DEVLINK_TRAP(LOCKED_PORT, DROP),
};
#define DEVLINK_TRAP_GROUP(_id) \
{ \
.id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
.name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
}
static const struct devlink_trap_group devlink_trap_group_generic[] = {
DEVLINK_TRAP_GROUP(L2_DROPS),
DEVLINK_TRAP_GROUP(L3_DROPS),
DEVLINK_TRAP_GROUP(L3_EXCEPTIONS),
DEVLINK_TRAP_GROUP(BUFFER_DROPS),
DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
DEVLINK_TRAP_GROUP(ACL_DROPS),
DEVLINK_TRAP_GROUP(STP),
DEVLINK_TRAP_GROUP(LACP),
DEVLINK_TRAP_GROUP(LLDP),
DEVLINK_TRAP_GROUP(MC_SNOOPING),
DEVLINK_TRAP_GROUP(DHCP),
DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY),
DEVLINK_TRAP_GROUP(BFD),
DEVLINK_TRAP_GROUP(OSPF),
DEVLINK_TRAP_GROUP(BGP),
DEVLINK_TRAP_GROUP(VRRP),
DEVLINK_TRAP_GROUP(PIM),
DEVLINK_TRAP_GROUP(UC_LB),
DEVLINK_TRAP_GROUP(LOCAL_DELIVERY),
DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY),
DEVLINK_TRAP_GROUP(IPV6),
DEVLINK_TRAP_GROUP(PTP_EVENT),
DEVLINK_TRAP_GROUP(PTP_GENERAL),
DEVLINK_TRAP_GROUP(ACL_SAMPLE),
DEVLINK_TRAP_GROUP(ACL_TRAP),
DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS),
DEVLINK_TRAP_GROUP(EAPOL),
};
static int devlink_trap_generic_verify(const struct devlink_trap *trap)
{
if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
return -EINVAL;
if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
return -EINVAL;
if (trap->type != devlink_trap_generic[trap->id].type)
return -EINVAL;
return 0;
}
static int devlink_trap_driver_verify(const struct devlink_trap *trap)
{
int i;
if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
if (!strcmp(trap->name, devlink_trap_generic[i].name))
return -EEXIST;
}
return 0;
}
static int devlink_trap_verify(const struct devlink_trap *trap)
{
if (!trap || !trap->name)
return -EINVAL;
if (trap->generic)
return devlink_trap_generic_verify(trap);
else
return devlink_trap_driver_verify(trap);
}
static int
devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
{
if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
return -EINVAL;
if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
return -EINVAL;
return 0;
}
static int
devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
{
int i;
if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
if (!strcmp(group->name, devlink_trap_group_generic[i].name))
return -EEXIST;
}
return 0;
}
static int devlink_trap_group_verify(const struct devlink_trap_group *group)
{
if (group->generic)
return devlink_trap_group_generic_verify(group);
else
return devlink_trap_group_driver_verify(group);
}
static void
devlink_trap_group_notify(struct devlink *devlink,
const struct devlink_trap_group_item *group_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
void devlink_trap_groups_notify_register(struct devlink *devlink)
{
struct devlink_trap_group_item *group_item;
list_for_each_entry(group_item, &devlink->trap_group_list, list)
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW);
}
void devlink_trap_groups_notify_unregister(struct devlink *devlink)
{
struct devlink_trap_group_item *group_item;
list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list)
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_DEL);
}
static int
devlink_trap_item_group_link(struct devlink *devlink,
struct devlink_trap_item *trap_item)
{
u16 group_id = trap_item->trap->init_group_id;
struct devlink_trap_group_item *group_item;
group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
if (WARN_ON_ONCE(!group_item))
return -EINVAL;
trap_item->group_item = group_item;
return 0;
}
static void devlink_trap_notify(struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
cmd != DEVLINK_CMD_TRAP_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
void devlink_traps_notify_register(struct devlink *devlink)
{
struct devlink_trap_item *trap_item;
list_for_each_entry(trap_item, &devlink->trap_list, list)
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
}
void devlink_traps_notify_unregister(struct devlink *devlink)
{
struct devlink_trap_item *trap_item;
list_for_each_entry_reverse(trap_item, &devlink->trap_list, list)
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
}
static int
devlink_trap_register(struct devlink *devlink,
const struct devlink_trap *trap, void *priv)
{
struct devlink_trap_item *trap_item;
int err;
if (devlink_trap_item_lookup(devlink, trap->name))
return -EEXIST;
trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
if (!trap_item)
return -ENOMEM;
trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
if (!trap_item->stats) {
err = -ENOMEM;
goto err_stats_alloc;
}
trap_item->trap = trap;
trap_item->action = trap->init_action;
trap_item->priv = priv;
err = devlink_trap_item_group_link(devlink, trap_item);
if (err)
goto err_group_link;
err = devlink->ops->trap_init(devlink, trap, trap_item);
if (err)
goto err_trap_init;
list_add_tail(&trap_item->list, &devlink->trap_list);
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
return 0;
err_trap_init:
err_group_link:
free_percpu(trap_item->stats);
err_stats_alloc:
kfree(trap_item);
return err;
}
static void devlink_trap_unregister(struct devlink *devlink,
const struct devlink_trap *trap)
{
struct devlink_trap_item *trap_item;
trap_item = devlink_trap_item_lookup(devlink, trap->name);
if (WARN_ON_ONCE(!trap_item))
return;
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
list_del(&trap_item->list);
if (devlink->ops->trap_fini)
devlink->ops->trap_fini(devlink, trap, trap_item);
free_percpu(trap_item->stats);
kfree(trap_item);
}
static void devlink_trap_disable(struct devlink *devlink,
const struct devlink_trap *trap)
{
struct devlink_trap_item *trap_item;
trap_item = devlink_trap_item_lookup(devlink, trap->name);
if (WARN_ON_ONCE(!trap_item))
return;
devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP,
NULL);
trap_item->action = DEVLINK_TRAP_ACTION_DROP;
}
/**
* devl_traps_register - Register packet traps with devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
* @priv: Driver private information.
*
* Return: Non-zero value on failure.
*/
int devl_traps_register(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count, void *priv)
{
int i, err;
if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
return -EINVAL;
devl_assert_locked(devlink);
for (i = 0; i < traps_count; i++) {
const struct devlink_trap *trap = &traps[i];
err = devlink_trap_verify(trap);
if (err)
goto err_trap_verify;
err = devlink_trap_register(devlink, trap, priv);
if (err)
goto err_trap_register;
}
return 0;
err_trap_register:
err_trap_verify:
for (i--; i >= 0; i--)
devlink_trap_unregister(devlink, &traps[i]);
return err;
}
EXPORT_SYMBOL_GPL(devl_traps_register);
/**
* devlink_traps_register - Register packet traps with devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
* @priv: Driver private information.
*
* Context: Takes and release devlink->lock <mutex>.
*
* Return: Non-zero value on failure.
*/
int devlink_traps_register(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count, void *priv)
{
int err;
devl_lock(devlink);
err = devl_traps_register(devlink, traps, traps_count, priv);
devl_unlock(devlink);
return err;
}
EXPORT_SYMBOL_GPL(devlink_traps_register);
/**
* devl_traps_unregister - Unregister packet traps from devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
*/
void devl_traps_unregister(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count)
{
int i;
devl_assert_locked(devlink);
/* Make sure we do not have any packets in-flight while unregistering
* traps by disabling all of them and waiting for a grace period.
*/
for (i = traps_count - 1; i >= 0; i--)
devlink_trap_disable(devlink, &traps[i]);
synchronize_rcu();
for (i = traps_count - 1; i >= 0; i--)
devlink_trap_unregister(devlink, &traps[i]);
}
EXPORT_SYMBOL_GPL(devl_traps_unregister);
/**
* devlink_traps_unregister - Unregister packet traps from devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
*
* Context: Takes and release devlink->lock <mutex>.
*/
void devlink_traps_unregister(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count)
{
devl_lock(devlink);
devl_traps_unregister(devlink, traps, traps_count);
devl_unlock(devlink);
}
EXPORT_SYMBOL_GPL(devlink_traps_unregister);
static void
devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
size_t skb_len)
{
struct devlink_stats *stats;
stats = this_cpu_ptr(trap_stats);
u64_stats_update_begin(&stats->syncp);
u64_stats_add(&stats->rx_bytes, skb_len);
u64_stats_inc(&stats->rx_packets);
u64_stats_update_end(&stats->syncp);
}
static void
devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata,
const struct devlink_trap_item *trap_item,
struct devlink_port *in_devlink_port,
const struct flow_action_cookie *fa_cookie)
{
metadata->trap_name = trap_item->trap->name;
metadata->trap_group_name = trap_item->group_item->group->name;
metadata->fa_cookie = fa_cookie;
metadata->trap_type = trap_item->trap->type;
spin_lock(&in_devlink_port->type_lock);
if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
metadata->input_dev = in_devlink_port->type_eth.netdev;
spin_unlock(&in_devlink_port->type_lock);
}
/**
* devlink_trap_report - Report trapped packet to drop monitor.
* @devlink: devlink.
* @skb: Trapped packet.
* @trap_ctx: Trap context.
* @in_devlink_port: Input devlink port.
* @fa_cookie: Flow action cookie. Could be NULL.
*/
void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
void *trap_ctx, struct devlink_port *in_devlink_port,
const struct flow_action_cookie *fa_cookie)
{
struct devlink_trap_item *trap_item = trap_ctx;
devlink_trap_stats_update(trap_item->stats, skb->len);
devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
if (tracepoint_enabled(devlink_trap_report)) {
struct devlink_trap_metadata metadata = {};
devlink_trap_report_metadata_set(&metadata, trap_item,
in_devlink_port, fa_cookie);
trace_devlink_trap_report(devlink, skb, &metadata);
}
}
EXPORT_SYMBOL_GPL(devlink_trap_report);
/**
* devlink_trap_ctx_priv - Trap context to driver private information.
* @trap_ctx: Trap context.
*
* Return: Driver private information passed during registration.
*/
void *devlink_trap_ctx_priv(void *trap_ctx)
{
struct devlink_trap_item *trap_item = trap_ctx;
return trap_item->priv;
}
EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
static int
devlink_trap_group_item_policer_link(struct devlink *devlink,
struct devlink_trap_group_item *group_item)
{
u32 policer_id = group_item->group->init_policer_id;
struct devlink_trap_policer_item *policer_item;
if (policer_id == 0)
return 0;
policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
if (WARN_ON_ONCE(!policer_item))
return -EINVAL;
group_item->policer_item = policer_item;
return 0;
}
static int
devlink_trap_group_register(struct devlink *devlink,
const struct devlink_trap_group *group)
{
struct devlink_trap_group_item *group_item;
int err;
if (devlink_trap_group_item_lookup(devlink, group->name))
return -EEXIST;
group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
if (!group_item)
return -ENOMEM;
group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
if (!group_item->stats) {
err = -ENOMEM;
goto err_stats_alloc;
}
group_item->group = group;
err = devlink_trap_group_item_policer_link(devlink, group_item);
if (err)
goto err_policer_link;
if (devlink->ops->trap_group_init) {
err = devlink->ops->trap_group_init(devlink, group);
if (err)
goto err_group_init;
}
list_add_tail(&group_item->list, &devlink->trap_group_list);
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW);
return 0;
err_group_init:
err_policer_link:
free_percpu(group_item->stats);
err_stats_alloc:
kfree(group_item);
return err;
}
static void
devlink_trap_group_unregister(struct devlink *devlink,
const struct devlink_trap_group *group)
{
struct devlink_trap_group_item *group_item;
group_item = devlink_trap_group_item_lookup(devlink, group->name);
if (WARN_ON_ONCE(!group_item))
return;
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_DEL);
list_del(&group_item->list);
free_percpu(group_item->stats);
kfree(group_item);
}
/**
* devl_trap_groups_register - Register packet trap groups with devlink.
* @devlink: devlink.
* @groups: Packet trap groups.
* @groups_count: Count of provided packet trap groups.
*
* Return: Non-zero value on failure.
*/
int devl_trap_groups_register(struct devlink *devlink,
const struct devlink_trap_group *groups,
size_t groups_count)
{
int i, err;
devl_assert_locked(devlink);
for (i = 0; i < groups_count; i++) {
const struct devlink_trap_group *group = &groups[i];
err = devlink_trap_group_verify(group);
if (err)
goto err_trap_group_verify;
err = devlink_trap_group_register(devlink, group);
if (err)
goto err_trap_group_register;
}
return 0;
err_trap_group_register:
err_trap_group_verify:
for (i--; i >= 0; i--)
devlink_trap_group_unregister(devlink, &groups[i]);
return err;
}
EXPORT_SYMBOL_GPL(devl_trap_groups_register);
/**
* devlink_trap_groups_register - Register packet trap groups with devlink.
* @devlink: devlink.
* @groups: Packet trap groups.
* @groups_count: Count of provided packet trap groups.
*
* Context: Takes and release devlink->lock <mutex>.
*
* Return: Non-zero value on failure.
*/
int devlink_trap_groups_register(struct devlink *devlink,
const struct devlink_trap_group *groups,
size_t groups_count)
{
int err;
devl_lock(devlink);
err = devl_trap_groups_register(devlink, groups, groups_count);
devl_unlock(devlink);
return err;
}
EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
/**
* devl_trap_groups_unregister - Unregister packet trap groups from devlink.
* @devlink: devlink.
* @groups: Packet trap groups.
* @groups_count: Count of provided packet trap groups.
*/
void devl_trap_groups_unregister(struct devlink *devlink,
const struct devlink_trap_group *groups,
size_t groups_count)
{
int i;
devl_assert_locked(devlink);
for (i = groups_count - 1; i >= 0; i--)
devlink_trap_group_unregister(devlink, &groups[i]);
}
EXPORT_SYMBOL_GPL(devl_trap_groups_unregister);
/**
* devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
* @devlink: devlink.
* @groups: Packet trap groups.
* @groups_count: Count of provided packet trap groups.
*
* Context: Takes and release devlink->lock <mutex>.
*/
void devlink_trap_groups_unregister(struct devlink *devlink,
const struct devlink_trap_group *groups,
size_t groups_count)
{
devl_lock(devlink);
devl_trap_groups_unregister(devlink, groups, groups_count);
devl_unlock(devlink);
}
EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
static void
devlink_trap_policer_notify(struct devlink *devlink,
const struct devlink_trap_policer_item *policer_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
void devlink_trap_policers_notify_register(struct devlink *devlink)
{
struct devlink_trap_policer_item *policer_item;
list_for_each_entry(policer_item, &devlink->trap_policer_list, list)
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_NEW);
}
void devlink_trap_policers_notify_unregister(struct devlink *devlink)
{
struct devlink_trap_policer_item *policer_item;
list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list,
list)
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_DEL);
}
static int
devlink_trap_policer_register(struct devlink *devlink,
const struct devlink_trap_policer *policer)
{
struct devlink_trap_policer_item *policer_item;
int err;
if (devlink_trap_policer_item_lookup(devlink, policer->id))
return -EEXIST;
policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
if (!policer_item)
return -ENOMEM;
policer_item->policer = policer;
policer_item->rate = policer->init_rate;
policer_item->burst = policer->init_burst;
if (devlink->ops->trap_policer_init) {
err = devlink->ops->trap_policer_init(devlink, policer);
if (err)
goto err_policer_init;
}
list_add_tail(&policer_item->list, &devlink->trap_policer_list);
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_NEW);
return 0;
err_policer_init:
kfree(policer_item);
return err;
}
static void
devlink_trap_policer_unregister(struct devlink *devlink,
const struct devlink_trap_policer *policer)
{
struct devlink_trap_policer_item *policer_item;
policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
if (WARN_ON_ONCE(!policer_item))
return;
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_DEL);
list_del(&policer_item->list);
if (devlink->ops->trap_policer_fini)
devlink->ops->trap_policer_fini(devlink, policer);
kfree(policer_item);
}
/**
* devl_trap_policers_register - Register packet trap policers with devlink.
* @devlink: devlink.
* @policers: Packet trap policers.
* @policers_count: Count of provided packet trap policers.
*
* Return: Non-zero value on failure.
*/
int
devl_trap_policers_register(struct devlink *devlink,
const struct devlink_trap_policer *policers,
size_t policers_count)
{
int i, err;
devl_assert_locked(devlink);
for (i = 0; i < policers_count; i++) {
const struct devlink_trap_policer *policer = &policers[i];
if (WARN_ON(policer->id == 0 ||
policer->max_rate < policer->min_rate ||
policer->max_burst < policer->min_burst)) {
err = -EINVAL;
goto err_trap_policer_verify;
}
err = devlink_trap_policer_register(devlink, policer);
if (err)
goto err_trap_policer_register;
}
return 0;
err_trap_policer_register:
err_trap_policer_verify:
for (i--; i >= 0; i--)
devlink_trap_policer_unregister(devlink, &policers[i]);
return err;
}
EXPORT_SYMBOL_GPL(devl_trap_policers_register);
/**
* devl_trap_policers_unregister - Unregister packet trap policers from devlink.
* @devlink: devlink.
* @policers: Packet trap policers.
* @policers_count: Count of provided packet trap policers.
*/
void
devl_trap_policers_unregister(struct devlink *devlink,
const struct devlink_trap_policer *policers,
size_t policers_count)
{
int i;
devl_assert_locked(devlink);
for (i = policers_count - 1; i >= 0; i--)
devlink_trap_policer_unregister(devlink, &policers[i]);
}
EXPORT_SYMBOL_GPL(devl_trap_policers_unregister);
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