diff options
Diffstat (limited to 'net/devlink/trap.c')
| -rw-r--r-- | net/devlink/trap.c | 1861 |
1 files changed, 1861 insertions, 0 deletions
diff --git a/net/devlink/trap.c b/net/devlink/trap.c new file mode 100644 index 000000000..c26bf9b29 --- /dev/null +++ b/net/devlink/trap.c @@ -0,0 +1,1861 @@ +// 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); |