diff options
Diffstat (limited to 'net/devlink/dpipe.c')
| -rw-r--r-- | net/devlink/dpipe.c | 917 |
1 files changed, 917 insertions, 0 deletions
diff --git a/net/devlink/dpipe.c b/net/devlink/dpipe.c new file mode 100644 index 000000000000..431227c412e5 --- /dev/null +++ b/net/devlink/dpipe.c @@ -0,0 +1,917 @@ +// 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 "devl_internal.h" + +static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = { + { + .name = "destination mac", + .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC, + .bitwidth = 48, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ethernet = { + .name = "ethernet", + .id = DEVLINK_DPIPE_HEADER_ETHERNET, + .fields = devlink_dpipe_fields_ethernet, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ethernet); + +static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = { + { + .name = "destination ip", + .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP, + .bitwidth = 32, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ipv4 = { + .name = "ipv4", + .id = DEVLINK_DPIPE_HEADER_IPV4, + .fields = devlink_dpipe_fields_ipv4, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv4); + +static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = { + { + .name = "destination ip", + .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP, + .bitwidth = 128, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ipv6 = { + .name = "ipv6", + .id = DEVLINK_DPIPE_HEADER_IPV6, + .fields = devlink_dpipe_fields_ipv6, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv6); + +int devlink_dpipe_match_put(struct sk_buff *skb, + struct devlink_dpipe_match *match) +{ + struct devlink_dpipe_header *header = match->header; + struct devlink_dpipe_field *field = &header->fields[match->field_id]; + struct nlattr *match_attr; + + match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH); + if (!match_attr) + return -EMSGSIZE; + + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + nla_nest_end(skb, match_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, match_attr); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_match_put); + +static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table, + struct sk_buff *skb) +{ + struct nlattr *matches_attr; + + matches_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_TABLE_MATCHES); + if (!matches_attr) + return -EMSGSIZE; + + if (table->table_ops->matches_dump(table->priv, skb)) + goto nla_put_failure; + + nla_nest_end(skb, matches_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, matches_attr); + return -EMSGSIZE; +} + +int devlink_dpipe_action_put(struct sk_buff *skb, + struct devlink_dpipe_action *action) +{ + struct devlink_dpipe_header *header = action->header; + struct devlink_dpipe_field *field = &header->fields[action->field_id]; + struct nlattr *action_attr; + + action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION); + if (!action_attr) + return -EMSGSIZE; + + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + nla_nest_end(skb, action_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, action_attr); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_action_put); + +static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table, + struct sk_buff *skb) +{ + struct nlattr *actions_attr; + + actions_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_TABLE_ACTIONS); + if (!actions_attr) + return -EMSGSIZE; + + if (table->table_ops->actions_dump(table->priv, skb)) + goto nla_put_failure; + + nla_nest_end(skb, actions_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, actions_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_table_put(struct sk_buff *skb, + struct devlink_dpipe_table *table) +{ + struct nlattr *table_attr; + u64 table_size; + + table_size = table->table_ops->size_get(table->priv); + table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE); + if (!table_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED, + table->counters_enabled)) + goto nla_put_failure; + + if (table->resource_valid) { + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID, + table->resource_id, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS, + table->resource_units, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + } + if (devlink_dpipe_matches_put(table, skb)) + goto nla_put_failure; + + if (devlink_dpipe_actions_put(table, skb)) + goto nla_put_failure; + + nla_nest_end(skb, table_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, table_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb, + struct genl_info *info) +{ + int err; + + if (*pskb) { + err = genlmsg_reply(*pskb, info); + if (err) + return err; + } + *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!*pskb) + return -ENOMEM; + return 0; +} + +static int devlink_dpipe_tables_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct list_head *dpipe_tables, + const char *table_name) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_dpipe_table *table; + struct nlattr *tables_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + bool incomplete; + void *hdr; + int i; + int err; + + table = list_first_entry(dpipe_tables, + struct devlink_dpipe_table, list); +start_again: + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, cmd); + if (!hdr) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + if (devlink_nl_put_handle(skb, devlink)) + goto nla_put_failure; + tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES); + if (!tables_attr) + goto nla_put_failure; + + i = 0; + incomplete = false; + list_for_each_entry_from(table, dpipe_tables, list) { + if (!table_name) { + err = devlink_dpipe_table_put(skb, table); + if (err) { + if (!i) + goto err_table_put; + incomplete = true; + break; + } + } else { + if (!strcmp(table->name, table_name)) { + err = devlink_dpipe_table_put(skb, table); + if (err) + break; + } + } + i++; + } + + nla_nest_end(skb, tables_attr); + genlmsg_end(skb, hdr); + if (incomplete) + goto start_again; + +send_done: + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + goto send_done; + } + + return genlmsg_reply(skb, info); + +nla_put_failure: + err = -EMSGSIZE; +err_table_put: + nlmsg_free(skb); + return err; +} + +int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const char *table_name = NULL; + + if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]) + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + + return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0, + &devlink->dpipe_table_list, + table_name); +} + +static int devlink_dpipe_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE, + value->value_size, value->value)) + return -EMSGSIZE; + if (value->mask) + if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK, + value->value_size, value->mask)) + return -EMSGSIZE; + if (value->mapping_valid) + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING, + value->mapping_value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_action_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (!value->action) + return -EINVAL; + if (devlink_dpipe_action_put(skb, value->action)) + return -EMSGSIZE; + if (devlink_dpipe_value_put(skb, value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_action_values_put(struct sk_buff *skb, + struct devlink_dpipe_value *values, + unsigned int values_count) +{ + struct nlattr *action_attr; + int i; + int err; + + for (i = 0; i < values_count; i++) { + action_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ACTION_VALUE); + if (!action_attr) + return -EMSGSIZE; + err = devlink_dpipe_action_value_put(skb, &values[i]); + if (err) + goto err_action_value_put; + nla_nest_end(skb, action_attr); + } + return 0; + +err_action_value_put: + nla_nest_cancel(skb, action_attr); + return err; +} + +static int devlink_dpipe_match_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (!value->match) + return -EINVAL; + if (devlink_dpipe_match_put(skb, value->match)) + return -EMSGSIZE; + if (devlink_dpipe_value_put(skb, value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_match_values_put(struct sk_buff *skb, + struct devlink_dpipe_value *values, + unsigned int values_count) +{ + struct nlattr *match_attr; + int i; + int err; + + for (i = 0; i < values_count; i++) { + match_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_MATCH_VALUE); + if (!match_attr) + return -EMSGSIZE; + err = devlink_dpipe_match_value_put(skb, &values[i]); + if (err) + goto err_match_value_put; + nla_nest_end(skb, match_attr); + } + return 0; + +err_match_value_put: + nla_nest_cancel(skb, match_attr); + return err; +} + +static int devlink_dpipe_entry_put(struct sk_buff *skb, + struct devlink_dpipe_entry *entry) +{ + struct nlattr *entry_attr, *matches_attr, *actions_attr; + int err; + + entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY); + if (!entry_attr) + return -EMSGSIZE; + + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (entry->counter_valid) + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER, + entry->counter, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + matches_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES); + if (!matches_attr) + goto nla_put_failure; + + err = devlink_dpipe_match_values_put(skb, entry->match_values, + entry->match_values_count); + if (err) { + nla_nest_cancel(skb, matches_attr); + goto err_match_values_put; + } + nla_nest_end(skb, matches_attr); + + actions_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES); + if (!actions_attr) + goto nla_put_failure; + + err = devlink_dpipe_action_values_put(skb, entry->action_values, + entry->action_values_count); + if (err) { + nla_nest_cancel(skb, actions_attr); + goto err_action_values_put; + } + nla_nest_end(skb, actions_attr); + + nla_nest_end(skb, entry_attr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; +err_match_values_put: +err_action_values_put: + nla_nest_cancel(skb, entry_attr); + return err; +} + +static struct devlink_dpipe_table * +devlink_dpipe_table_find(struct list_head *dpipe_tables, + const char *table_name, struct devlink *devlink) +{ + struct devlink_dpipe_table *table; + + list_for_each_entry_rcu(table, dpipe_tables, list, + lockdep_is_held(&devlink->lock)) { + if (!strcmp(table->name, table_name)) + return table; + } + return NULL; +} + +int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx) +{ + struct devlink *devlink; + int err; + + err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb, + dump_ctx->info); + if (err) + return err; + + dump_ctx->hdr = genlmsg_put(dump_ctx->skb, + dump_ctx->info->snd_portid, + dump_ctx->info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, + dump_ctx->cmd); + if (!dump_ctx->hdr) + goto nla_put_failure; + + devlink = dump_ctx->info->user_ptr[0]; + if (devlink_nl_put_handle(dump_ctx->skb, devlink)) + goto nla_put_failure; + dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb, + DEVLINK_ATTR_DPIPE_ENTRIES); + if (!dump_ctx->nest) + goto nla_put_failure; + return 0; + +nla_put_failure: + nlmsg_free(dump_ctx->skb); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare); + +int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx, + struct devlink_dpipe_entry *entry) +{ + return devlink_dpipe_entry_put(dump_ctx->skb, entry); +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append); + +int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx) +{ + nla_nest_end(dump_ctx->skb, dump_ctx->nest); + genlmsg_end(dump_ctx->skb, dump_ctx->hdr); + return 0; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close); + +void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry) + +{ + unsigned int value_count, value_index; + struct devlink_dpipe_value *value; + + value = entry->action_values; + value_count = entry->action_values_count; + for (value_index = 0; value_index < value_count; value_index++) { + kfree(value[value_index].value); + kfree(value[value_index].mask); + } + + value = entry->match_values; + value_count = entry->match_values_count; + for (value_index = 0; value_index < value_count; value_index++) { + kfree(value[value_index].value); + kfree(value[value_index].mask); + } +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_clear); + +static int devlink_dpipe_entries_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct devlink_dpipe_table *table) +{ + struct devlink_dpipe_dump_ctx dump_ctx; + struct nlmsghdr *nlh; + int err; + + dump_ctx.skb = NULL; + dump_ctx.cmd = cmd; + dump_ctx.info = info; + + err = table->table_ops->entries_dump(table->priv, + table->counters_enabled, + &dump_ctx); + if (err) + return err; + +send_done: + nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info); + if (err) + return err; + goto send_done; + } + return genlmsg_reply(dump_ctx.skb, info); +} + +int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_dpipe_table *table; + const char *table_name; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME)) + return -EINVAL; + + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + if (!table->table_ops->entries_dump) + return -EINVAL; + + return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET, + 0, table); +} + +static int devlink_dpipe_fields_put(struct sk_buff *skb, + const struct devlink_dpipe_header *header) +{ + struct devlink_dpipe_field *field; + struct nlattr *field_attr; + int i; + + for (i = 0; i < header->fields_count; i++) { + field = &header->fields[i]; + field_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_FIELD); + if (!field_attr) + return -EMSGSIZE; + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type)) + goto nla_put_failure; + nla_nest_end(skb, field_attr); + } + return 0; + +nla_put_failure: + nla_nest_cancel(skb, field_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_header_put(struct sk_buff *skb, + struct devlink_dpipe_header *header) +{ + struct nlattr *fields_attr, *header_attr; + int err; + + header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER); + if (!header_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + fields_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_HEADER_FIELDS); + if (!fields_attr) + goto nla_put_failure; + + err = devlink_dpipe_fields_put(skb, header); + if (err) { + nla_nest_cancel(skb, fields_attr); + goto nla_put_failure; + } + nla_nest_end(skb, fields_attr); + nla_nest_end(skb, header_attr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; + nla_nest_cancel(skb, header_attr); + return err; +} + +static int devlink_dpipe_headers_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct devlink_dpipe_headers * + dpipe_headers) +{ + struct devlink *devlink = info->user_ptr[0]; + struct nlattr *headers_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + void *hdr; + int i, j; + int err; + + i = 0; +start_again: + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, cmd); + if (!hdr) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + if (devlink_nl_put_handle(skb, devlink)) + goto nla_put_failure; + headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS); + if (!headers_attr) + goto nla_put_failure; + + j = 0; + for (; i < dpipe_headers->headers_count; i++) { + err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]); + if (err) { + if (!j) + goto err_table_put; + break; + } + j++; + } + nla_nest_end(skb, headers_attr); + genlmsg_end(skb, hdr); + if (i != dpipe_headers->headers_count) + goto start_again; + +send_done: + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + goto send_done; + } + return genlmsg_reply(skb, info); + +nla_put_failure: + err = -EMSGSIZE; +err_table_put: + nlmsg_free(skb); + return err; +} + +int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + if (!devlink->dpipe_headers) + return -EOPNOTSUPP; + return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET, + 0, devlink->dpipe_headers); +} + +static int devlink_dpipe_table_counters_set(struct devlink *devlink, + const char *table_name, + bool enable) +{ + struct devlink_dpipe_table *table; + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + if (table->counter_control_extern) + return -EOPNOTSUPP; + + if (!(table->counters_enabled ^ enable)) + return 0; + + table->counters_enabled = enable; + if (table->table_ops->counters_set_update) + table->table_ops->counters_set_update(table->priv, enable); + return 0; +} + +int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const char *table_name; + bool counters_enable; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME) || + GENL_REQ_ATTR_CHECK(info, + DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED)) + return -EINVAL; + + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]); + + return devlink_dpipe_table_counters_set(devlink, table_name, + counters_enable); +} + +/** + * devl_dpipe_headers_register - register dpipe headers + * + * @devlink: devlink + * @dpipe_headers: dpipe header array + * + * Register the headers supported by hardware. + */ +void devl_dpipe_headers_register(struct devlink *devlink, + struct devlink_dpipe_headers *dpipe_headers) +{ + lockdep_assert_held(&devlink->lock); + + devlink->dpipe_headers = dpipe_headers; +} +EXPORT_SYMBOL_GPL(devl_dpipe_headers_register); + +/** + * devl_dpipe_headers_unregister - unregister dpipe headers + * + * @devlink: devlink + * + * Unregister the headers supported by hardware. + */ +void devl_dpipe_headers_unregister(struct devlink *devlink) +{ + lockdep_assert_held(&devlink->lock); + + devlink->dpipe_headers = NULL; +} +EXPORT_SYMBOL_GPL(devl_dpipe_headers_unregister); + +/** + * devlink_dpipe_table_counter_enabled - check if counter allocation + * required + * @devlink: devlink + * @table_name: tables name + * + * Used by driver to check if counter allocation is required. + * After counter allocation is turned on the table entries + * are updated to include counter statistics. + * + * After that point on the driver must respect the counter + * state so that each entry added to the table is added + * with a counter. + */ +bool devlink_dpipe_table_counter_enabled(struct devlink *devlink, + const char *table_name) +{ + struct devlink_dpipe_table *table; + bool enabled; + + rcu_read_lock(); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + enabled = false; + if (table) + enabled = table->counters_enabled; + rcu_read_unlock(); + return enabled; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled); + +/** + * devl_dpipe_table_register - register dpipe table + * + * @devlink: devlink + * @table_name: table name + * @table_ops: table ops + * @priv: priv + * @counter_control_extern: external control for counters + */ +int devl_dpipe_table_register(struct devlink *devlink, + const char *table_name, + struct devlink_dpipe_table_ops *table_ops, + void *priv, bool counter_control_extern) +{ + struct devlink_dpipe_table *table; + + lockdep_assert_held(&devlink->lock); + + if (WARN_ON(!table_ops->size_get)) + return -EINVAL; + + if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name, + devlink)) + return -EEXIST; + + table = kzalloc(sizeof(*table), GFP_KERNEL); + if (!table) + return -ENOMEM; + + table->name = table_name; + table->table_ops = table_ops; + table->priv = priv; + table->counter_control_extern = counter_control_extern; + + list_add_tail_rcu(&table->list, &devlink->dpipe_table_list); + + return 0; +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_register); + +/** + * devl_dpipe_table_unregister - unregister dpipe table + * + * @devlink: devlink + * @table_name: table name + */ +void devl_dpipe_table_unregister(struct devlink *devlink, + const char *table_name) +{ + struct devlink_dpipe_table *table; + + lockdep_assert_held(&devlink->lock); + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return; + list_del_rcu(&table->list); + kfree_rcu(table, rcu); +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_unregister); + +/** + * devl_dpipe_table_resource_set - set the resource id + * + * @devlink: devlink + * @table_name: table name + * @resource_id: resource id + * @resource_units: number of resource's units consumed per table's entry + */ +int devl_dpipe_table_resource_set(struct devlink *devlink, + const char *table_name, u64 resource_id, + u64 resource_units) +{ + struct devlink_dpipe_table *table; + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + table->resource_id = resource_id; + table->resource_units = resource_units; + table->resource_valid = true; + return 0; +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_resource_set); |