diff options
Diffstat (limited to 'net/core/devlink.c')
| -rw-r--r-- | net/core/devlink.c | 10353 |
1 files changed, 10353 insertions, 0 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c new file mode 100644 index 000000000..38666dde8 --- /dev/null +++ b/net/core/devlink.c @@ -0,0 +1,10353 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * net/core/devlink.c - Network physical/parent device Netlink interface + * + * Heavily inspired by net/wireless/ + * Copyright (c) 2016 Mellanox Technologies. All rights reserved. + * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/gfp.h> +#include <linux/device.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/refcount.h> +#include <linux/workqueue.h> +#include <linux/u64_stats_sync.h> +#include <linux/timekeeping.h> +#include <rdma/ib_verbs.h> +#include <net/netlink.h> +#include <net/genetlink.h> +#include <net/rtnetlink.h> +#include <net/net_namespace.h> +#include <net/sock.h> +#include <net/devlink.h> +#define CREATE_TRACE_POINTS +#include <trace/events/devlink.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(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(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(devlink_dpipe_header_ipv6); + +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg); +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr); +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report); + +static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { + [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, +}; + +static LIST_HEAD(devlink_list); + +/* devlink_mutex + * + * An overall lock guarding every operation coming from userspace. + * It also guards devlink devices list and it is taken when + * driver registers/unregisters it. + */ +static DEFINE_MUTEX(devlink_mutex); + +struct net *devlink_net(const struct devlink *devlink) +{ + return read_pnet(&devlink->_net); +} +EXPORT_SYMBOL_GPL(devlink_net); + +static void __devlink_net_set(struct devlink *devlink, struct net *net) +{ + write_pnet(&devlink->_net, net); +} + +void devlink_net_set(struct devlink *devlink, struct net *net) +{ + if (WARN_ON(devlink->registered)) + return; + __devlink_net_set(devlink, net); +} +EXPORT_SYMBOL_GPL(devlink_net_set); + +static struct devlink *devlink_get_from_attrs(struct net *net, + struct nlattr **attrs) +{ + struct devlink *devlink; + char *busname; + char *devname; + + if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME]) + return ERR_PTR(-EINVAL); + + busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]); + devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]); + + lockdep_assert_held(&devlink_mutex); + + list_for_each_entry(devlink, &devlink_list, list) { + if (strcmp(devlink->dev->bus->name, busname) == 0 && + strcmp(dev_name(devlink->dev), devname) == 0 && + net_eq(devlink_net(devlink), net)) + return devlink; + } + + return ERR_PTR(-ENODEV); +} + +static struct devlink *devlink_get_from_info(struct genl_info *info) +{ + return devlink_get_from_attrs(genl_info_net(info), info->attrs); +} + +static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, + unsigned int port_index) +{ + struct devlink_port *devlink_port; + + list_for_each_entry(devlink_port, &devlink->port_list, list) { + if (devlink_port->index == port_index) + return devlink_port; + } + return NULL; +} + +static bool devlink_port_index_exists(struct devlink *devlink, + unsigned int port_index) +{ + return devlink_port_get_by_index(devlink, port_index); +} + +static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, + struct nlattr **attrs) +{ + if (attrs[DEVLINK_ATTR_PORT_INDEX]) { + u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); + struct devlink_port *devlink_port; + + devlink_port = devlink_port_get_by_index(devlink, port_index); + if (!devlink_port) + return ERR_PTR(-ENODEV); + return devlink_port; + } + return ERR_PTR(-EINVAL); +} + +static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + return devlink_port_get_from_attrs(devlink, info->attrs); +} + +struct devlink_sb { + struct list_head list; + unsigned int index; + u32 size; + u16 ingress_pools_count; + u16 egress_pools_count; + u16 ingress_tc_count; + u16 egress_tc_count; +}; + +static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb) +{ + return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count; +} + +static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink, + unsigned int sb_index) +{ + struct devlink_sb *devlink_sb; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + if (devlink_sb->index == sb_index) + return devlink_sb; + } + return NULL; +} + +static bool devlink_sb_index_exists(struct devlink *devlink, + unsigned int sb_index) +{ + return devlink_sb_get_by_index(devlink, sb_index); +} + +static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink, + struct nlattr **attrs) +{ + if (attrs[DEVLINK_ATTR_SB_INDEX]) { + u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]); + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_by_index(devlink, sb_index); + if (!devlink_sb) + return ERR_PTR(-ENODEV); + return devlink_sb; + } + return ERR_PTR(-EINVAL); +} + +static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + return devlink_sb_get_from_attrs(devlink, info->attrs); +} + +static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb, + struct nlattr **attrs, + u16 *p_pool_index) +{ + u16 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX]) + return -EINVAL; + + val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]); + if (val >= devlink_sb_pool_count(devlink_sb)) + return -EINVAL; + *p_pool_index = val; + return 0; +} + +static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb, + struct genl_info *info, + u16 *p_pool_index) +{ + return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs, + p_pool_index); +} + +static int +devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs, + enum devlink_sb_pool_type *p_pool_type) +{ + u8 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE]) + return -EINVAL; + + val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]); + if (val != DEVLINK_SB_POOL_TYPE_INGRESS && + val != DEVLINK_SB_POOL_TYPE_EGRESS) + return -EINVAL; + *p_pool_type = val; + return 0; +} + +static int +devlink_sb_pool_type_get_from_info(struct genl_info *info, + enum devlink_sb_pool_type *p_pool_type) +{ + return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type); +} + +static int +devlink_sb_th_type_get_from_attrs(struct nlattr **attrs, + enum devlink_sb_threshold_type *p_th_type) +{ + u8 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]) + return -EINVAL; + + val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]); + if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC && + val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC) + return -EINVAL; + *p_th_type = val; + return 0; +} + +static int +devlink_sb_th_type_get_from_info(struct genl_info *info, + enum devlink_sb_threshold_type *p_th_type) +{ + return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type); +} + +static int +devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb, + struct nlattr **attrs, + enum devlink_sb_pool_type pool_type, + u16 *p_tc_index) +{ + u16 val; + + if (!attrs[DEVLINK_ATTR_SB_TC_INDEX]) + return -EINVAL; + + val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]); + if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS && + val >= devlink_sb->ingress_tc_count) + return -EINVAL; + if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS && + val >= devlink_sb->egress_tc_count) + return -EINVAL; + *p_tc_index = val; + return 0; +} + +static int +devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb, + struct genl_info *info, + enum devlink_sb_pool_type pool_type, + u16 *p_tc_index) +{ + return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs, + pool_type, p_tc_index); +} + +struct devlink_region { + struct devlink *devlink; + struct devlink_port *port; + struct list_head list; + union { + const struct devlink_region_ops *ops; + const struct devlink_port_region_ops *port_ops; + }; + struct list_head snapshot_list; + u32 max_snapshots; + u32 cur_snapshots; + u64 size; +}; + +struct devlink_snapshot { + struct list_head list; + struct devlink_region *region; + u8 *data; + u32 id; +}; + +static struct devlink_region * +devlink_region_get_by_name(struct devlink *devlink, const char *region_name) +{ + struct devlink_region *region; + + list_for_each_entry(region, &devlink->region_list, list) + if (!strcmp(region->ops->name, region_name)) + return region; + + return NULL; +} + +static struct devlink_region * +devlink_port_region_get_by_name(struct devlink_port *port, + const char *region_name) +{ + struct devlink_region *region; + + list_for_each_entry(region, &port->region_list, list) + if (!strcmp(region->ops->name, region_name)) + return region; + + return NULL; +} + +static struct devlink_snapshot * +devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id) +{ + struct devlink_snapshot *snapshot; + + list_for_each_entry(snapshot, ®ion->snapshot_list, list) + if (snapshot->id == id) + return snapshot; + + return NULL; +} + +#define DEVLINK_NL_FLAG_NEED_PORT BIT(0) +#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1) + +/* The per devlink instance lock is taken by default in the pre-doit + * operation, yet several commands do not require this. The global + * devlink lock is taken and protects from disruption by user-calls. + */ +#define DEVLINK_NL_FLAG_NO_LOCK BIT(2) + +static int devlink_nl_pre_doit(const struct genl_ops *ops, + struct sk_buff *skb, struct genl_info *info) +{ + struct devlink_port *devlink_port; + struct devlink *devlink; + int err; + + mutex_lock(&devlink_mutex); + devlink = devlink_get_from_info(info); + if (IS_ERR(devlink)) { + mutex_unlock(&devlink_mutex); + return PTR_ERR(devlink); + } + if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK) + mutex_lock(&devlink->lock); + info->user_ptr[0] = devlink; + if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) { + devlink_port = devlink_port_get_from_info(devlink, info); + if (IS_ERR(devlink_port)) { + err = PTR_ERR(devlink_port); + goto unlock; + } + info->user_ptr[1] = devlink_port; + } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) { + devlink_port = devlink_port_get_from_info(devlink, info); + if (!IS_ERR(devlink_port)) + info->user_ptr[1] = devlink_port; + } + return 0; + +unlock: + if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK) + mutex_unlock(&devlink->lock); + mutex_unlock(&devlink_mutex); + return err; +} + +static void devlink_nl_post_doit(const struct genl_ops *ops, + struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink; + + devlink = info->user_ptr[0]; + if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK) + mutex_unlock(&devlink->lock); + mutex_unlock(&devlink_mutex); +} + +static struct genl_family devlink_nl_family; + +enum devlink_multicast_groups { + DEVLINK_MCGRP_CONFIG, +}; + +static const struct genl_multicast_group devlink_nl_mcgrps[] = { + [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME }, +}; + +static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) +{ + if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name)) + return -EMSGSIZE; + if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) + return -EMSGSIZE; + return 0; +} + +struct devlink_reload_combination { + enum devlink_reload_action action; + enum devlink_reload_limit limit; +}; + +static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = { + { + /* can't reinitialize driver with no down time */ + .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT, + .limit = DEVLINK_RELOAD_LIMIT_NO_RESET, + }, +}; + +static bool +devlink_reload_combination_is_invalid(enum devlink_reload_action action, + enum devlink_reload_limit limit) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) + if (devlink_reload_invalid_combinations[i].action == action && + devlink_reload_invalid_combinations[i].limit == limit) + return true; + return false; +} + +static bool +devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action) +{ + return test_bit(action, &devlink->ops->reload_actions); +} + +static bool +devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit) +{ + return test_bit(limit, &devlink->ops->reload_limits); +} + +static int devlink_reload_stat_put(struct sk_buff *msg, + enum devlink_reload_limit limit, u32 value) +{ + struct nlattr *reload_stats_entry; + + reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY); + if (!reload_stats_entry) + return -EMSGSIZE; + + if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) || + nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value)) + goto nla_put_failure; + nla_nest_end(msg, reload_stats_entry); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, reload_stats_entry); + return -EMSGSIZE; +} + +static int devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote) +{ + struct nlattr *reload_stats_attr, *act_info, *act_stats; + int i, j, stat_idx; + u32 value; + + if (!is_remote) + reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS); + else + reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS); + + if (!reload_stats_attr) + return -EMSGSIZE; + + for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) { + if ((!is_remote && + !devlink_reload_action_is_supported(devlink, i)) || + i == DEVLINK_RELOAD_ACTION_UNSPEC) + continue; + act_info = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_INFO); + if (!act_info) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, i)) + goto action_info_nest_cancel; + act_stats = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_STATS); + if (!act_stats) + goto action_info_nest_cancel; + + for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) { + /* Remote stats are shown even if not locally supported. + * Stats of actions with unspecified limit are shown + * though drivers don't need to register unspecified + * limit. + */ + if ((!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC && + !devlink_reload_limit_is_supported(devlink, j)) || + devlink_reload_combination_is_invalid(i, j)) + continue; + + stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i; + if (!is_remote) + value = devlink->stats.reload_stats[stat_idx]; + else + value = devlink->stats.remote_reload_stats[stat_idx]; + if (devlink_reload_stat_put(msg, j, value)) + goto action_stats_nest_cancel; + } + nla_nest_end(msg, act_stats); + nla_nest_end(msg, act_info); + } + nla_nest_end(msg, reload_stats_attr); + return 0; + +action_stats_nest_cancel: + nla_nest_cancel(msg, act_stats); +action_info_nest_cancel: + nla_nest_cancel(msg, act_info); +nla_put_failure: + nla_nest_cancel(msg, reload_stats_attr); + return -EMSGSIZE; +} + +static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink, + enum devlink_command cmd, u32 portid, + u32 seq, int flags) +{ + struct nlattr *dev_stats; + void *hdr; + + 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_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed)) + goto nla_put_failure; + + dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS); + if (!dev_stats) + goto nla_put_failure; + + if (devlink_reload_stats_put(msg, devlink, false)) + goto dev_stats_nest_cancel; + if (devlink_reload_stats_put(msg, devlink, true)) + goto dev_stats_nest_cancel; + + nla_nest_end(msg, dev_stats); + genlmsg_end(msg, hdr); + return 0; + +dev_stats_nest_cancel: + nla_nest_cancel(msg, dev_stats); +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_notify(struct devlink *devlink, enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_fill(msg, devlink, 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); +} + +static int devlink_nl_port_attrs_put(struct sk_buff *msg, + struct devlink_port *devlink_port) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + + if (!devlink_port->attrs_set) + return 0; + if (attrs->lanes) { + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) + return -EMSGSIZE; + } + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) + return -EMSGSIZE; + if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) + return -EMSGSIZE; + switch (devlink_port->attrs.flavour) { + case DEVLINK_PORT_FLAVOUR_PCI_PF: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, + attrs->pci_pf.controller) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) + return -EMSGSIZE; + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) + return -EMSGSIZE; + break; + case DEVLINK_PORT_FLAVOUR_PCI_VF: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, + attrs->pci_vf.controller) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) + return -EMSGSIZE; + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) + return -EMSGSIZE; + break; + case DEVLINK_PORT_FLAVOUR_PHYSICAL: + case DEVLINK_PORT_FLAVOUR_CPU: + case DEVLINK_PORT_FLAVOUR_DSA: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, + attrs->phys.port_number)) + return -EMSGSIZE; + if (!attrs->split) + return 0; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, + attrs->phys.port_number)) + return -EMSGSIZE; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, + attrs->phys.split_subport_number)) + return -EMSGSIZE; + break; + default: + break; + } + return 0; +} + +static int +devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, + struct netlink_ext_ack *extack) +{ + struct devlink *devlink = port->devlink; + const struct devlink_ops *ops; + struct nlattr *function_attr; + bool empty_nest = true; + int err = 0; + + function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); + if (!function_attr) + return -EMSGSIZE; + + ops = devlink->ops; + if (ops->port_function_hw_addr_get) { + int hw_addr_len; + u8 hw_addr[MAX_ADDR_LEN]; + + err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack); + if (err == -EOPNOTSUPP) { + /* Port function attributes are optional for a port. If port doesn't + * support function attribute, returning -EOPNOTSUPP is not an error. + */ + err = 0; + goto out; + } else if (err) { + goto out; + } + err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); + if (err) + goto out; + empty_nest = false; + } + +out: + if (err || empty_nest) + nla_nest_cancel(msg, function_attr); + else + nla_nest_end(msg, function_attr); + return err; +} + +static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_port *devlink_port, + enum devlink_command cmd, u32 portid, + u32 seq, int flags, + struct netlink_ext_ack *extack) +{ + void *hdr; + + 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_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + + /* Hold rtnl lock while accessing port's netdev attributes. */ + rtnl_lock(); + spin_lock_bh(&devlink_port->type_lock); + if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) + goto nla_put_failure_type_locked; + if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && + nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, + devlink_port->desired_type)) + goto nla_put_failure_type_locked; + if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { + struct net *net = devlink_net(devlink_port->devlink); + struct net_device *netdev = devlink_port->type_dev; + + if (netdev && net_eq(net, dev_net(netdev)) && + (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, + netdev->ifindex) || + nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, + netdev->name))) + goto nla_put_failure_type_locked; + } + if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { + struct ib_device *ibdev = devlink_port->type_dev; + + if (ibdev && + nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, + ibdev->name)) + goto nla_put_failure_type_locked; + } + spin_unlock_bh(&devlink_port->type_lock); + rtnl_unlock(); + if (devlink_nl_port_attrs_put(msg, devlink_port)) + goto nla_put_failure; + if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure_type_locked: + spin_unlock_bh(&devlink_port->type_lock); + rtnl_unlock(); +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_port_notify(struct devlink_port *devlink_port, + enum devlink_command cmd) +{ + struct devlink *devlink = devlink_port->devlink; + struct sk_buff *msg; + int err; + + if (!devlink_port->registered) + return; + + WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0, + NULL); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, NLM_F_MULTI); + if (err) + goto out; + idx++; + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_port_fill(msg, devlink, devlink_port, + DEVLINK_CMD_PORT_NEW, + info->snd_portid, info->snd_seq, 0, + info->extack); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + struct devlink_port *devlink_port; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_port, &devlink->port_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_port_fill(msg, devlink, devlink_port, + DEVLINK_CMD_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, + cb->extack); + if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_port_type_set(struct devlink *devlink, + struct devlink_port *devlink_port, + enum devlink_port_type port_type) + +{ + int err; + + if (devlink->ops->port_type_set) { + if (port_type == devlink_port->type) + return 0; + err = devlink->ops->port_type_set(devlink_port, port_type); + if (err) + return err; + devlink_port->desired_type = port_type; + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + return 0; + } + return -EOPNOTSUPP; +} + +static int +devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *port, + const struct nlattr *attr, struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops; + const u8 *hw_addr; + int hw_addr_len; + int err; + + hw_addr = nla_data(attr); + hw_addr_len = nla_len(attr); + if (hw_addr_len > MAX_ADDR_LEN) { + NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too long"); + return -EINVAL; + } + if (port->type == DEVLINK_PORT_TYPE_ETH) { + if (hw_addr_len != ETH_ALEN) { + NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for Ethernet device"); + return -EINVAL; + } + if (!is_unicast_ether_addr(hw_addr)) { + NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware address unsupported"); + return -EINVAL; + } + } + + ops = devlink->ops; + if (!ops->port_function_hw_addr_set) { + NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function attributes"); + return -EOPNOTSUPP; + } + + err = ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack); + if (err) + return err; + + devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); + return 0; +} + +static int +devlink_port_function_set(struct devlink *devlink, struct devlink_port *port, + const struct nlattr *attr, struct netlink_ext_ack *extack) +{ + struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1]; + int err; + + err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr, + devlink_function_nl_policy, extack); + if (err < 0) { + NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function attributes"); + return err; + } + + attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; + if (attr) + err = devlink_port_function_hw_addr_set(devlink, port, attr, extack); + + return err; +} + +static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + int err; + + if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { + enum devlink_port_type port_type; + + port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); + err = devlink_port_type_set(devlink, devlink_port, port_type); + if (err) + return err; + } + + if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { + struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; + struct netlink_ext_ack *extack = info->extack; + + err = devlink_port_function_set(devlink, devlink_port, attr, extack); + if (err) + return err; + } + + return 0; +} + +static int devlink_port_split(struct devlink *devlink, u32 port_index, + u32 count, struct netlink_ext_ack *extack) + +{ + if (devlink->ops->port_split) + return devlink->ops->port_split(devlink, port_index, count, + extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_port *devlink_port; + u32 port_index; + u32 count; + + if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] || + !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]) + return -EINVAL; + + devlink_port = devlink_port_get_from_info(devlink, info); + port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); + + if (IS_ERR(devlink_port)) + return -EINVAL; + + if (!devlink_port->attrs.splittable) { + /* Split ports cannot be split. */ + if (devlink_port->attrs.split) + NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further"); + else + NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split"); + return -EINVAL; + } + + if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { + NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count"); + return -EINVAL; + } + + return devlink_port_split(devlink, port_index, count, info->extack); +} + +static int devlink_port_unsplit(struct devlink *devlink, u32 port_index, + struct netlink_ext_ack *extack) + +{ + if (devlink->ops->port_unsplit) + return devlink->ops->port_unsplit(devlink, port_index, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + u32 port_index; + + if (!info->attrs[DEVLINK_ATTR_PORT_INDEX]) + return -EINVAL; + + port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + return devlink_port_unsplit(devlink, port_index, info->extack); +} + +static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_sb *devlink_sb, + enum devlink_command cmd, u32 portid, + u32 seq, int flags) +{ + void *hdr; + + 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_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT, + devlink_sb->ingress_pools_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT, + devlink_sb->egress_pools_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT, + devlink_sb->ingress_tc_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT, + devlink_sb->egress_tc_count)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_fill(msg, devlink, devlink_sb, + DEVLINK_CMD_SB_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + struct devlink_sb *devlink_sb; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_sb_fill(msg, devlink, devlink_sb, + DEVLINK_CMD_SB_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_sb *devlink_sb, + u16 pool_index, enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + struct devlink_sb_pool_info pool_info; + void *hdr; + int err; + + err = devlink->ops->sb_pool_get(devlink, devlink_sb->index, + pool_index, &pool_info); + if (err) + return 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_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE, + pool_info.threshold_type)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE, + pool_info.cell_size)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + u16 pool_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!devlink->ops->sb_pool_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index, + DEVLINK_CMD_SB_POOL_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + u16 pool_count = devlink_sb_pool_count(devlink_sb); + u16 pool_index; + int err; + + for (pool_index = 0; pool_index < pool_count; pool_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_pool_fill(msg, devlink, + devlink_sb, + pool_index, + DEVLINK_CMD_SB_POOL_NEW, + portid, seq, NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + return 0; +} + +static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + struct devlink_sb *devlink_sb; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || + !devlink->ops->sb_pool_get) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_pool_get_dumpit(msg, start, &idx, devlink, + devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index, + u16 pool_index, u32 size, + enum devlink_sb_threshold_type threshold_type, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink->ops; + + if (ops->sb_pool_set) + return ops->sb_pool_set(devlink, sb_index, pool_index, + size, threshold_type, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + enum devlink_sb_threshold_type threshold_type; + struct devlink_sb *devlink_sb; + u16 pool_index; + u32 size; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + err = devlink_sb_th_type_get_from_info(info, &threshold_type); + if (err) + return err; + + if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]) + return -EINVAL; + + size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]); + return devlink_sb_pool_set(devlink, devlink_sb->index, + pool_index, size, threshold_type, + info->extack); +} + +static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_port *devlink_port, + struct devlink_sb *devlink_sb, + u16 pool_index, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + const struct devlink_ops *ops = devlink->ops; + u32 threshold; + void *hdr; + int err; + + err = ops->sb_port_pool_get(devlink_port, devlink_sb->index, + pool_index, &threshold); + if (err) + return 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_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) + goto nla_put_failure; + + if (ops->sb_occ_port_pool_get) { + u32 cur; + u32 max; + + err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index, + pool_index, &cur, &max); + if (err && err != -EOPNOTSUPP) + goto sb_occ_get_failure; + if (!err) { + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max)) + goto nla_put_failure; + } + } + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; +sb_occ_get_failure: + genlmsg_cancel(msg, hdr); + return err; +} + +static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + u16 pool_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!devlink->ops->sb_port_pool_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port, + devlink_sb, pool_index, + DEVLINK_CMD_SB_PORT_POOL_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + struct devlink_port *devlink_port; + u16 pool_count = devlink_sb_pool_count(devlink_sb); + u16 pool_index; + int err; + + list_for_each_entry(devlink_port, &devlink->port_list, list) { + for (pool_index = 0; pool_index < pool_count; pool_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_port_pool_fill(msg, devlink, + devlink_port, + devlink_sb, + pool_index, + DEVLINK_CMD_SB_PORT_POOL_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + } + return 0; +} + +static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + struct devlink_sb *devlink_sb; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || + !devlink->ops->sb_port_pool_get) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_port_pool_get_dumpit(msg, start, &idx, + devlink, devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_sb_port_pool_set(struct devlink_port *devlink_port, + unsigned int sb_index, u16 pool_index, + u32 threshold, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + if (ops->sb_port_pool_set) + return ops->sb_port_pool_set(devlink_port, sb_index, + pool_index, threshold, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + u16 pool_index; + u32 threshold; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD]) + return -EINVAL; + + threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]); + return devlink_sb_port_pool_set(devlink_port, devlink_sb->index, + pool_index, threshold, info->extack); +} + +static int +devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_port *devlink_port, + struct devlink_sb *devlink_sb, u16 tc_index, + enum devlink_sb_pool_type pool_type, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + const struct devlink_ops *ops = devlink->ops; + u16 pool_index; + u32 threshold; + void *hdr; + int err; + + err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index, + tc_index, pool_type, + &pool_index, &threshold); + if (err) + return 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_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) + goto nla_put_failure; + + if (ops->sb_occ_tc_port_bind_get) { + u32 cur; + u32 max; + + err = ops->sb_occ_tc_port_bind_get(devlink_port, + devlink_sb->index, + tc_index, pool_type, + &cur, &max); + if (err && err != -EOPNOTSUPP) + return err; + if (!err) { + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max)) + goto nla_put_failure; + } + } + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + enum devlink_sb_pool_type pool_type; + u16 tc_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_type_get_from_info(info, &pool_type); + if (err) + return err; + + err = devlink_sb_tc_index_get_from_info(devlink_sb, info, + pool_type, &tc_index); + if (err) + return err; + + if (!devlink->ops->sb_tc_pool_bind_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port, + devlink_sb, tc_index, pool_type, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + info->snd_portid, + info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg, + int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + struct devlink_port *devlink_port; + u16 tc_index; + int err; + + list_for_each_entry(devlink_port, &devlink->port_list, list) { + for (tc_index = 0; + tc_index < devlink_sb->ingress_tc_count; tc_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, + devlink_port, + devlink_sb, + tc_index, + DEVLINK_SB_POOL_TYPE_INGRESS, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + for (tc_index = 0; + tc_index < devlink_sb->egress_tc_count; tc_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, + devlink_port, + devlink_sb, + tc_index, + DEVLINK_SB_POOL_TYPE_EGRESS, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + } + return 0; +} + +static int +devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + struct devlink_sb *devlink_sb; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || + !devlink->ops->sb_tc_pool_bind_get) + continue; + + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx, + devlink, + devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 pool_index, u32 threshold, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + if (ops->sb_tc_pool_bind_set) + return ops->sb_tc_pool_bind_set(devlink_port, sb_index, + tc_index, pool_type, + pool_index, threshold, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + enum devlink_sb_pool_type pool_type; + struct devlink_sb *devlink_sb; + u16 tc_index; + u16 pool_index; + u32 threshold; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_type_get_from_info(info, &pool_type); + if (err) + return err; + + err = devlink_sb_tc_index_get_from_info(devlink_sb, info, + pool_type, &tc_index); + if (err) + return err; + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD]) + return -EINVAL; + + threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]); + return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index, + tc_index, pool_type, + pool_index, threshold, info->extack); +} + +static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const struct devlink_ops *ops = devlink->ops; + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + if (ops->sb_occ_snapshot) + return ops->sb_occ_snapshot(devlink, devlink_sb->index); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const struct devlink_ops *ops = devlink->ops; + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + if (ops->sb_occ_max_clear) + return ops->sb_occ_max_clear(devlink, devlink_sb->index); + return -EOPNOTSUPP; +} + +static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink, + enum devlink_command cmd, u32 portid, + u32 seq, int flags) +{ + const struct devlink_ops *ops = devlink->ops; + enum devlink_eswitch_encap_mode encap_mode; + u8 inline_mode; + void *hdr; + int err = 0; + u16 mode; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + err = devlink_nl_put_handle(msg, devlink); + if (err) + goto nla_put_failure; + + if (ops->eswitch_mode_get) { + err = ops->eswitch_mode_get(devlink, &mode); + if (err) + goto nla_put_failure; + err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode); + if (err) + goto nla_put_failure; + } + + if (ops->eswitch_inline_mode_get) { + err = ops->eswitch_inline_mode_get(devlink, &inline_mode); + if (err) + goto nla_put_failure; + err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE, + inline_mode); + if (err) + goto nla_put_failure; + } + + if (ops->eswitch_encap_mode_get) { + err = ops->eswitch_encap_mode_get(devlink, &encap_mode); + if (err) + goto nla_put_failure; + err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode); + if (err) + goto nla_put_failure; + } + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return err; +} + +static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET, + info->snd_portid, info->snd_seq, 0); + + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const struct devlink_ops *ops = devlink->ops; + enum devlink_eswitch_encap_mode encap_mode; + u8 inline_mode; + int err = 0; + u16 mode; + + if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) { + if (!ops->eswitch_mode_set) + return -EOPNOTSUPP; + mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]); + err = ops->eswitch_mode_set(devlink, mode, info->extack); + if (err) + return err; + } + + if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) { + if (!ops->eswitch_inline_mode_set) + return -EOPNOTSUPP; + inline_mode = nla_get_u8( + info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]); + err = ops->eswitch_inline_mode_set(devlink, inline_mode, + info->extack); + if (err) + return err; + } + + if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) { + if (!ops->eswitch_encap_mode_set) + return -EOPNOTSUPP; + encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]); + err = ops->eswitch_encap_mode_set(devlink, encap_mode, + info->extack); + if (err) + return err; + } + + return 0; +} + +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; +} + +static 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(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); +} + +static 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 (!info->attrs[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; +} + +static 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; +} + +static 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 (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] || + !info->attrs[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); +} + +static struct devlink_resource * +devlink_resource_find(struct devlink *devlink, + struct devlink_resource *resource, u64 resource_id) +{ + struct list_head *resource_list; + + if (resource) + resource_list = &resource->resource_list; + else + resource_list = &devlink->resource_list; + + list_for_each_entry(resource, resource_list, list) { + struct devlink_resource *child_resource; + + if (resource->id == resource_id) + return resource; + + child_resource = devlink_resource_find(devlink, resource, + resource_id); + if (child_resource) + return child_resource; + } + return NULL; +} + +static void +devlink_resource_validate_children(struct devlink_resource *resource) +{ + struct devlink_resource *child_resource; + bool size_valid = true; + u64 parts_size = 0; + + if (list_empty(&resource->resource_list)) + goto out; + + list_for_each_entry(child_resource, &resource->resource_list, list) + parts_size += child_resource->size_new; + + if (parts_size > resource->size_new) + size_valid = false; +out: + resource->size_valid = size_valid; +} + +static int +devlink_resource_validate_size(struct devlink_resource *resource, u64 size, + struct netlink_ext_ack *extack) +{ + u64 reminder; + int err = 0; + + if (size > resource->size_params.size_max) { + NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum"); + err = -EINVAL; + } + + if (size < resource->size_params.size_min) { + NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum"); + err = -EINVAL; + } + + div64_u64_rem(size, resource->size_params.size_granularity, &reminder); + if (reminder) { + NL_SET_ERR_MSG_MOD(extack, "Wrong granularity"); + err = -EINVAL; + } + + return err; +} + +static int devlink_nl_cmd_resource_set(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_resource *resource; + u64 resource_id; + u64 size; + int err; + + if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] || + !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]) + return -EINVAL; + resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]); + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (!resource) + return -EINVAL; + + size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]); + err = devlink_resource_validate_size(resource, size, info->extack); + if (err) + return err; + + resource->size_new = size; + devlink_resource_validate_children(resource); + if (resource->parent) + devlink_resource_validate_children(resource->parent); + return 0; +} + +static int +devlink_resource_size_params_put(struct devlink_resource *resource, + struct sk_buff *skb) +{ + struct devlink_resource_size_params *size_params; + + size_params = &resource->size_params; + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN, + size_params->size_granularity, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX, + size_params->size_max, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN, + size_params->size_min, DEVLINK_ATTR_PAD) || + nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit)) + return -EMSGSIZE; + return 0; +} + +static int devlink_resource_occ_put(struct devlink_resource *resource, + struct sk_buff *skb) +{ + if (!resource->occ_get) + return 0; + return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC, + resource->occ_get(resource->occ_get_priv), + DEVLINK_ATTR_PAD); +} + +static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb, + struct devlink_resource *resource) +{ + struct devlink_resource *child_resource; + struct nlattr *child_resource_attr; + struct nlattr *resource_attr; + + resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE); + if (!resource_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size, + DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (resource->size != resource->size_new) + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW, + resource->size_new, DEVLINK_ATTR_PAD); + if (devlink_resource_occ_put(resource, skb)) + goto nla_put_failure; + if (devlink_resource_size_params_put(resource, skb)) + goto nla_put_failure; + if (list_empty(&resource->resource_list)) + goto out; + + if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID, + resource->size_valid)) + goto nla_put_failure; + + child_resource_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_RESOURCE_LIST); + if (!child_resource_attr) + goto nla_put_failure; + + list_for_each_entry(child_resource, &resource->resource_list, list) { + if (devlink_resource_put(devlink, skb, child_resource)) + goto resource_put_failure; + } + + nla_nest_end(skb, child_resource_attr); +out: + nla_nest_end(skb, resource_attr); + return 0; + +resource_put_failure: + nla_nest_cancel(skb, child_resource_attr); +nla_put_failure: + nla_nest_cancel(skb, resource_attr); + return -EMSGSIZE; +} + +static int devlink_resource_fill(struct genl_info *info, + enum devlink_command cmd, int flags) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_resource *resource; + struct nlattr *resources_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + bool incomplete; + void *hdr; + int i; + int err; + + resource = list_first_entry(&devlink->resource_list, + struct devlink_resource, 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; + + resources_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_RESOURCE_LIST); + if (!resources_attr) + goto nla_put_failure; + + incomplete = false; + i = 0; + list_for_each_entry_from(resource, &devlink->resource_list, list) { + err = devlink_resource_put(devlink, skb, resource); + if (err) { + if (!i) + goto err_resource_put; + incomplete = true; + break; + } + i++; + } + nla_nest_end(skb, resources_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_resource_put: + nlmsg_free(skb); + return err; +} + +static int devlink_nl_cmd_resource_dump(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + if (list_empty(&devlink->resource_list)) + return -EOPNOTSUPP; + + return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0); +} + +static int +devlink_resources_validate(struct devlink *devlink, + struct devlink_resource *resource, + struct genl_info *info) +{ + struct list_head *resource_list; + int err = 0; + + if (resource) + resource_list = &resource->resource_list; + else + resource_list = &devlink->resource_list; + + list_for_each_entry(resource, resource_list, list) { + if (!resource->size_valid) + return -EINVAL; + err = devlink_resources_validate(devlink, resource, info); + if (err) + return err; + } + return err; +} + +static struct net *devlink_netns_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID]; + struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD]; + struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID]; + struct net *net; + + if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) { + NL_SET_ERR_MSG_MOD(info->extack, "multiple netns identifying attributes specified"); + return ERR_PTR(-EINVAL); + } + + if (netns_pid_attr) { + net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr)); + } else if (netns_fd_attr) { + net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr)); + } else if (netns_id_attr) { + net = get_net_ns_by_id(sock_net(skb->sk), + nla_get_u32(netns_id_attr)); + if (!net) + net = ERR_PTR(-EINVAL); + } else { + WARN_ON(1); + net = ERR_PTR(-EINVAL); + } + if (IS_ERR(net)) { + NL_SET_ERR_MSG_MOD(info->extack, "Unknown network namespace"); + return ERR_PTR(-EINVAL); + } + if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { + put_net(net); + return ERR_PTR(-EPERM); + } + return net; +} + +static void devlink_param_notify(struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd); + +static void devlink_ns_change_notify(struct devlink *devlink, + struct net *dest_net, struct net *curr_net, + bool new) +{ + struct devlink_param_item *param_item; + enum devlink_command cmd; + + /* Userspace needs to be notified about devlink objects + * removed from original and entering new network namespace. + * The rest of the devlink objects are re-created during + * reload process so the notifications are generated separatelly. + */ + + if (!dest_net || net_eq(dest_net, curr_net)) + return; + + if (new) + devlink_notify(devlink, DEVLINK_CMD_NEW); + + cmd = new ? DEVLINK_CMD_PARAM_NEW : DEVLINK_CMD_PARAM_DEL; + list_for_each_entry(param_item, &devlink->param_list, list) + devlink_param_notify(devlink, 0, param_item, cmd); + + if (!new) + devlink_notify(devlink, DEVLINK_CMD_DEL); +} + +static bool devlink_reload_supported(const struct devlink_ops *ops) +{ + return ops->reload_down && ops->reload_up; +} + +static void devlink_reload_failed_set(struct devlink *devlink, + bool reload_failed) +{ + if (devlink->reload_failed == reload_failed) + return; + devlink->reload_failed = reload_failed; + devlink_notify(devlink, DEVLINK_CMD_NEW); +} + +bool devlink_is_reload_failed(const struct devlink *devlink) +{ + return devlink->reload_failed; +} +EXPORT_SYMBOL_GPL(devlink_is_reload_failed); + +static void +__devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats, + enum devlink_reload_limit limit, u32 actions_performed) +{ + unsigned long actions = actions_performed; + int stat_idx; + int action; + + for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) { + stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action; + reload_stats[stat_idx]++; + } + devlink_notify(devlink, DEVLINK_CMD_NEW); +} + +static void +devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit, + u32 actions_performed) +{ + __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit, + actions_performed); +} + +/** + * devlink_remote_reload_actions_performed - Update devlink on reload actions + * performed which are not a direct result of devlink reload call. + * + * This should be called by a driver after performing reload actions in case it was not + * a result of devlink reload call. For example fw_activate was performed as a result + * of devlink reload triggered fw_activate on another host. + * The motivation for this function is to keep data on reload actions performed on this + * function whether it was done due to direct devlink reload call or not. + * + * @devlink: devlink + * @limit: reload limit + * @actions_performed: bitmask of actions performed + */ +void devlink_remote_reload_actions_performed(struct devlink *devlink, + enum devlink_reload_limit limit, + u32 actions_performed) +{ + if (WARN_ON(!actions_performed || + actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) || + actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) || + limit > DEVLINK_RELOAD_LIMIT_MAX)) + return; + + __devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit, + actions_performed); +} +EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed); + +static int devlink_reload(struct devlink *devlink, struct net *dest_net, + enum devlink_reload_action action, enum devlink_reload_limit limit, + u32 *actions_performed, struct netlink_ext_ack *extack) +{ + u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; + struct net *curr_net; + int err; + + if (!devlink->reload_enabled) + return -EOPNOTSUPP; + + memcpy(remote_reload_stats, devlink->stats.remote_reload_stats, + sizeof(remote_reload_stats)); + + curr_net = devlink_net(devlink); + devlink_ns_change_notify(devlink, dest_net, curr_net, false); + err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack); + if (err) + return err; + + if (dest_net && !net_eq(dest_net, curr_net)) + __devlink_net_set(devlink, dest_net); + + err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack); + devlink_reload_failed_set(devlink, !!err); + if (err) + return err; + + devlink_ns_change_notify(devlink, dest_net, curr_net, true); + WARN_ON(!(*actions_performed & BIT(action))); + /* Catch driver on updating the remote action within devlink reload */ + WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats, + sizeof(remote_reload_stats))); + devlink_reload_stats_update(devlink, limit, *actions_performed); + return 0; +} + +static int +devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed, + enum devlink_command cmd, struct genl_info *info) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd); + if (!hdr) + goto free_msg; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed, + actions_performed)) + goto nla_put_failure; + genlmsg_end(msg, hdr); + + return genlmsg_reply(msg, info); + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + enum devlink_reload_action action; + enum devlink_reload_limit limit; + struct net *dest_net = NULL; + u32 actions_performed; + int err; + + if (!devlink_reload_supported(devlink->ops)) + return -EOPNOTSUPP; + + err = devlink_resources_validate(devlink, NULL, info); + if (err) { + NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed"); + return err; + } + + if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION]) + action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]); + else + action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT; + + if (!devlink_reload_action_is_supported(devlink, action)) { + NL_SET_ERR_MSG_MOD(info->extack, + "Requested reload action is not supported by the driver"); + return -EOPNOTSUPP; + } + + limit = DEVLINK_RELOAD_LIMIT_UNSPEC; + if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) { + struct nla_bitfield32 limits; + u32 limits_selected; + + limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]); + limits_selected = limits.value & limits.selector; + if (!limits_selected) { + NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected"); + return -EINVAL; + } + for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++) + if (limits_selected & BIT(limit)) + break; + /* UAPI enables multiselection, but currently it is not used */ + if (limits_selected != BIT(limit)) { + NL_SET_ERR_MSG_MOD(info->extack, + "Multiselection of limit is not supported"); + return -EOPNOTSUPP; + } + if (!devlink_reload_limit_is_supported(devlink, limit)) { + NL_SET_ERR_MSG_MOD(info->extack, + "Requested limit is not supported by the driver"); + return -EOPNOTSUPP; + } + if (devlink_reload_combination_is_invalid(action, limit)) { + NL_SET_ERR_MSG_MOD(info->extack, + "Requested limit is invalid for this action"); + return -EINVAL; + } + } + if (info->attrs[DEVLINK_ATTR_NETNS_PID] || + info->attrs[DEVLINK_ATTR_NETNS_FD] || + info->attrs[DEVLINK_ATTR_NETNS_ID]) { + dest_net = devlink_netns_get(skb, info); + if (IS_ERR(dest_net)) + return PTR_ERR(dest_net); + } + + err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack); + + if (dest_net) + put_net(dest_net); + + if (err) + return err; + /* For backward compatibility generate reply only if attributes used by user */ + if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) + return 0; + + return devlink_nl_reload_actions_performed_snd(devlink, actions_performed, + DEVLINK_CMD_RELOAD, info); +} + +static int devlink_nl_flash_update_fill(struct sk_buff *msg, + struct devlink *devlink, + enum devlink_command cmd, + struct devlink_flash_notify *params) +{ + void *hdr; + + hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS) + goto out; + + if (params->status_msg && + nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG, + params->status_msg)) + goto nla_put_failure; + if (params->component && + nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT, + params->component)) + goto nla_put_failure; + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE, + params->done, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL, + params->total, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT, + params->timeout, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + +out: + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void __devlink_flash_update_notify(struct devlink *devlink, + enum devlink_command cmd, + struct devlink_flash_notify *params) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE && + cmd != DEVLINK_CMD_FLASH_UPDATE_END && + cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_flash_update_fill(msg, devlink, cmd, params); + if (err) + goto out_free_msg; + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); + return; + +out_free_msg: + nlmsg_free(msg); +} + +void devlink_flash_update_begin_notify(struct devlink *devlink) +{ + struct devlink_flash_notify params = {}; + + __devlink_flash_update_notify(devlink, + DEVLINK_CMD_FLASH_UPDATE, + ¶ms); +} +EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify); + +void devlink_flash_update_end_notify(struct devlink *devlink) +{ + struct devlink_flash_notify params = {}; + + __devlink_flash_update_notify(devlink, + DEVLINK_CMD_FLASH_UPDATE_END, + ¶ms); +} +EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify); + +void devlink_flash_update_status_notify(struct devlink *devlink, + const char *status_msg, + const char *component, + unsigned long done, + unsigned long total) +{ + struct devlink_flash_notify params = { + .status_msg = status_msg, + .component = component, + .done = done, + .total = total, + }; + + __devlink_flash_update_notify(devlink, + DEVLINK_CMD_FLASH_UPDATE_STATUS, + ¶ms); +} +EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify); + +void devlink_flash_update_timeout_notify(struct devlink *devlink, + const char *status_msg, + const char *component, + unsigned long timeout) +{ + struct devlink_flash_notify params = { + .status_msg = status_msg, + .component = component, + .timeout = timeout, + }; + + __devlink_flash_update_notify(devlink, + DEVLINK_CMD_FLASH_UPDATE_STATUS, + ¶ms); +} +EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify); + +static int devlink_nl_cmd_flash_update(struct sk_buff *skb, + struct genl_info *info) +{ + struct nlattr *nla_component, *nla_overwrite_mask; + struct devlink_flash_update_params params = {}; + struct devlink *devlink = info->user_ptr[0]; + u32 supported_params; + + if (!devlink->ops->flash_update) + return -EOPNOTSUPP; + + if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]) + return -EINVAL; + + supported_params = devlink->ops->supported_flash_update_params; + + params.file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]); + + nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT]; + if (nla_component) { + if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) { + NL_SET_ERR_MSG_ATTR(info->extack, nla_component, + "component update is not supported by this device"); + return -EOPNOTSUPP; + } + params.component = nla_data(nla_component); + } + + nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK]; + if (nla_overwrite_mask) { + struct nla_bitfield32 sections; + + if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) { + NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask, + "overwrite settings are not supported by this device"); + return -EOPNOTSUPP; + } + sections = nla_get_bitfield32(nla_overwrite_mask); + params.overwrite_mask = sections.value & sections.selector; + } + + return devlink->ops->flash_update(devlink, ¶ms, info->extack); +} + +static const struct devlink_param devlink_param_generic[] = { + { + .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET, + .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS, + .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME, + .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, + .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT, + .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME, + .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, + .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME, + .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, + .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME, + .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE, + .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME, + .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE, + .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET, + .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE, + }, +}; + +static int devlink_param_generic_verify(const struct devlink_param *param) +{ + /* verify it match generic parameter by id and name */ + if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + if (strcmp(param->name, devlink_param_generic[param->id].name)) + return -ENOENT; + + WARN_ON(param->type != devlink_param_generic[param->id].type); + + return 0; +} + +static int devlink_param_driver_verify(const struct devlink_param *param) +{ + int i; + + if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + /* verify no such name in generic params */ + for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++) + if (!strcmp(param->name, devlink_param_generic[i].name)) + return -EEXIST; + + return 0; +} + +static struct devlink_param_item * +devlink_param_find_by_name(struct list_head *param_list, + const char *param_name) +{ + struct devlink_param_item *param_item; + + list_for_each_entry(param_item, param_list, list) + if (!strcmp(param_item->param->name, param_name)) + return param_item; + return NULL; +} + +static struct devlink_param_item * +devlink_param_find_by_id(struct list_head *param_list, u32 param_id) +{ + struct devlink_param_item *param_item; + + list_for_each_entry(param_item, param_list, list) + if (param_item->param->id == param_id) + return param_item; + return NULL; +} + +static bool +devlink_param_cmode_is_supported(const struct devlink_param *param, + enum devlink_param_cmode cmode) +{ + return test_bit(cmode, ¶m->supported_cmodes); +} + +static int devlink_param_get(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->get) + return -EOPNOTSUPP; + return param->get(devlink, param->id, ctx); +} + +static int devlink_param_set(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->set) + return -EOPNOTSUPP; + return param->set(devlink, param->id, ctx); +} + +static int +devlink_param_type_to_nla_type(enum devlink_param_type param_type) +{ + switch (param_type) { + case DEVLINK_PARAM_TYPE_U8: + return NLA_U8; + case DEVLINK_PARAM_TYPE_U16: + return NLA_U16; + case DEVLINK_PARAM_TYPE_U32: + return NLA_U32; + case DEVLINK_PARAM_TYPE_STRING: + return NLA_STRING; + case DEVLINK_PARAM_TYPE_BOOL: + return NLA_FLAG; + default: + return -EINVAL; + } +} + +static int +devlink_nl_param_value_fill_one(struct sk_buff *msg, + enum devlink_param_type type, + enum devlink_param_cmode cmode, + union devlink_param_value val) +{ + struct nlattr *param_value_attr; + + param_value_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUE); + if (!param_value_attr) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode)) + goto value_nest_cancel; + + switch (type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_STRING: + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, + val.vstr)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (val.vbool && + nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA)) + goto value_nest_cancel; + break; + } + + nla_nest_end(msg, param_value_attr); + return 0; + +value_nest_cancel: + nla_nest_cancel(msg, param_value_attr); +nla_put_failure: + return -EMSGSIZE; +} + +static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1]; + bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {}; + const struct devlink_param *param = param_item->param; + struct devlink_param_gset_ctx ctx; + struct nlattr *param_values_list; + struct nlattr *param_attr; + int nla_type; + void *hdr; + int err; + int i; + + /* Get value from driver part to driverinit configuration mode */ + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!devlink_param_cmode_is_supported(param, i)) + continue; + if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) { + if (!param_item->driverinit_value_valid) + return -EOPNOTSUPP; + param_value[i] = param_item->driverinit_value; + } else { + if (!param_item->published) + continue; + ctx.cmode = i; + err = devlink_param_get(devlink, param, &ctx); + if (err) + return err; + param_value[i] = ctx.val; + } + param_value_set[i] = true; + } + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto genlmsg_cancel; + + if (cmd == DEVLINK_CMD_PORT_PARAM_GET || + cmd == DEVLINK_CMD_PORT_PARAM_NEW || + cmd == DEVLINK_CMD_PORT_PARAM_DEL) + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index)) + goto genlmsg_cancel; + + param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM); + if (!param_attr) + goto genlmsg_cancel; + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name)) + goto param_nest_cancel; + if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC)) + goto param_nest_cancel; + + nla_type = devlink_param_type_to_nla_type(param->type); + if (nla_type < 0) + goto param_nest_cancel; + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type)) + goto param_nest_cancel; + + param_values_list = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUES_LIST); + if (!param_values_list) + goto param_nest_cancel; + + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!param_value_set[i]) + continue; + err = devlink_nl_param_value_fill_one(msg, param->type, + i, param_value[i]); + if (err) + goto values_list_nest_cancel; + } + + nla_nest_end(msg, param_values_list); + nla_nest_end(msg, param_attr); + genlmsg_end(msg, hdr); + return 0; + +values_list_nest_cancel: + nla_nest_end(msg, param_values_list); +param_nest_cancel: + nla_nest_cancel(msg, param_attr); +genlmsg_cancel: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_param_notify(struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL && + cmd != DEVLINK_CMD_PORT_PARAM_NEW && + cmd != DEVLINK_CMD_PORT_PARAM_DEL); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + err = devlink_nl_param_fill(msg, devlink, port_index, param_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); +} + +static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink_param_item *param_item; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(param_item, &devlink->param_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +static int +devlink_param_type_get_from_info(struct genl_info *info, + enum devlink_param_type *param_type) +{ + if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE]) + return -EINVAL; + + switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) { + case NLA_U8: + *param_type = DEVLINK_PARAM_TYPE_U8; + break; + case NLA_U16: + *param_type = DEVLINK_PARAM_TYPE_U16; + break; + case NLA_U32: + *param_type = DEVLINK_PARAM_TYPE_U32; + break; + case NLA_STRING: + *param_type = DEVLINK_PARAM_TYPE_STRING; + break; + case NLA_FLAG: + *param_type = DEVLINK_PARAM_TYPE_BOOL; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +devlink_param_value_get_from_info(const struct devlink_param *param, + struct genl_info *info, + union devlink_param_value *value) +{ + struct nlattr *param_data; + int len; + + param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]; + + if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data) + return -EINVAL; + + switch (param->type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_len(param_data) != sizeof(u8)) + return -EINVAL; + value->vu8 = nla_get_u8(param_data); + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_len(param_data) != sizeof(u16)) + return -EINVAL; + value->vu16 = nla_get_u16(param_data); + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_len(param_data) != sizeof(u32)) + return -EINVAL; + value->vu32 = nla_get_u32(param_data); + break; + case DEVLINK_PARAM_TYPE_STRING: + len = strnlen(nla_data(param_data), nla_len(param_data)); + if (len == nla_len(param_data) || + len >= __DEVLINK_PARAM_MAX_STRING_VALUE) + return -EINVAL; + strcpy(value->vstr, nla_data(param_data)); + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (param_data && nla_len(param_data)) + return -EINVAL; + value->vbool = nla_get_flag(param_data); + break; + } + return 0; +} + +static struct devlink_param_item * +devlink_param_get_from_info(struct list_head *param_list, + struct genl_info *info) +{ + char *param_name; + + if (!info->attrs[DEVLINK_ATTR_PARAM_NAME]) + return NULL; + + param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]); + return devlink_param_find_by_name(param_list, param_name); +} + +static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_param_item *param_item; + struct sk_buff *msg; + int err; + + param_item = devlink_param_get_from_info(&devlink->param_list, info); + if (!param_item) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, + struct genl_info *info, + enum devlink_command cmd) +{ + enum devlink_param_type param_type; + struct devlink_param_gset_ctx ctx; + enum devlink_param_cmode cmode; + struct devlink_param_item *param_item; + const struct devlink_param *param; + union devlink_param_value value; + int err = 0; + + param_item = devlink_param_get_from_info(param_list, info); + if (!param_item) + return -EINVAL; + param = param_item->param; + err = devlink_param_type_get_from_info(info, ¶m_type); + if (err) + return err; + if (param_type != param->type) + return -EINVAL; + err = devlink_param_value_get_from_info(param, info, &value); + if (err) + return err; + if (param->validate) { + err = param->validate(devlink, param->id, value, info->extack); + if (err) + return err; + } + + if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]) + return -EINVAL; + cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]); + if (!devlink_param_cmode_is_supported(param, cmode)) + return -EOPNOTSUPP; + + if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) { + if (param->type == DEVLINK_PARAM_TYPE_STRING) + strcpy(param_item->driverinit_value.vstr, value.vstr); + else + param_item->driverinit_value = value; + param_item->driverinit_value_valid = true; + } else { + if (!param->set) + return -EOPNOTSUPP; + ctx.val = value; + ctx.cmode = cmode; + err = devlink_param_set(devlink, param, &ctx); + if (err) + return err; + } + + devlink_param_notify(devlink, port_index, param_item, cmd); + return 0; +} + +static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list, + info, DEVLINK_CMD_PARAM_NEW); +} + +static int devlink_param_register_one(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, + const struct devlink_param *param, + enum devlink_command cmd) +{ + struct devlink_param_item *param_item; + + if (devlink_param_find_by_name(param_list, param->name)) + return -EEXIST; + + if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) + WARN_ON(param->get || param->set); + else + WARN_ON(!param->get || !param->set); + + param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); + if (!param_item) + return -ENOMEM; + param_item->param = param; + + list_add_tail(¶m_item->list, param_list); + devlink_param_notify(devlink, port_index, param_item, cmd); + return 0; +} + +static void devlink_param_unregister_one(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, + const struct devlink_param *param, + enum devlink_command cmd) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_name(param_list, param->name); + WARN_ON(!param_item); + devlink_param_notify(devlink, port_index, param_item, cmd); + list_del(¶m_item->list); + kfree(param_item); +} + +static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink_param_item *param_item; + struct devlink_port *devlink_port; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(devlink_port, &devlink->port_list, list) { + list_for_each_entry(param_item, + &devlink_port->param_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_param_fill(msg, + devlink_port->devlink, + devlink_port->index, param_item, + DEVLINK_CMD_PORT_PARAM_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink_param_item *param_item; + struct sk_buff *msg; + int err; + + param_item = devlink_param_get_from_info(&devlink_port->param_list, + info); + if (!param_item) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_param_fill(msg, devlink_port->devlink, + devlink_port->index, param_item, + DEVLINK_CMD_PORT_PARAM_GET, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + + return __devlink_nl_cmd_param_set_doit(devlink_port->devlink, + devlink_port->index, + &devlink_port->param_list, info, + DEVLINK_CMD_PORT_PARAM_NEW); +} + +static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_snapshot *snapshot) +{ + struct nlattr *snap_attr; + int err; + + snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT); + if (!snap_attr) + return -EINVAL; + + err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id); + if (err) + goto nla_put_failure; + + nla_nest_end(msg, snap_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, snap_attr); + return err; +} + +static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_region *region) +{ + struct devlink_snapshot *snapshot; + struct nlattr *snapshots_attr; + int err; + + snapshots_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_REGION_SNAPSHOTS); + if (!snapshots_attr) + return -EINVAL; + + list_for_each_entry(snapshot, ®ion->snapshot_list, list) { + err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot); + if (err) + goto nla_put_failure; + } + + nla_nest_end(msg, snapshots_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, snapshots_attr); + return err; +} + +static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink, + enum devlink_command cmd, u32 portid, + u32 seq, int flags, + struct devlink_region *region) +{ + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + err = devlink_nl_put_handle(msg, devlink); + if (err) + goto nla_put_failure; + + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto nla_put_failure; + } + + err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name); + if (err) + goto nla_put_failure; + + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE, + region->size, + DEVLINK_ATTR_PAD); + if (err) + goto nla_put_failure; + + err = devlink_nl_region_snapshots_id_put(msg, devlink, region); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return err; +} + +static struct sk_buff * +devlink_nl_region_notify_build(struct devlink_region *region, + struct devlink_snapshot *snapshot, + enum devlink_command cmd, u32 portid, u32 seq) +{ + struct devlink *devlink = region->devlink; + struct sk_buff *msg; + void *hdr; + int err; + + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return ERR_PTR(-ENOMEM); + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd); + if (!hdr) { + err = -EMSGSIZE; + goto out_free_msg; + } + + err = devlink_nl_put_handle(msg, devlink); + if (err) + goto out_cancel_msg; + + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto out_cancel_msg; + } + + err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, + region->ops->name); + if (err) + goto out_cancel_msg; + + if (snapshot) { + err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, + snapshot->id); + if (err) + goto out_cancel_msg; + } else { + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE, + region->size, DEVLINK_ATTR_PAD); + if (err) + goto out_cancel_msg; + } + genlmsg_end(msg, hdr); + + return msg; + +out_cancel_msg: + genlmsg_cancel(msg, hdr); +out_free_msg: + nlmsg_free(msg); + return ERR_PTR(err); +} + +static void devlink_nl_region_notify(struct devlink_region *region, + struct devlink_snapshot *snapshot, + enum devlink_command cmd) +{ + struct devlink *devlink = region->devlink; + struct sk_buff *msg; + + WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL); + + msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0); + if (IS_ERR(msg)) + return; + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +/** + * __devlink_snapshot_id_increment - Increment number of snapshots using an id + * @devlink: devlink instance + * @id: the snapshot id + * + * Track when a new snapshot begins using an id. Load the count for the + * given id from the snapshot xarray, increment it, and store it back. + * + * Called when a new snapshot is created with the given id. + * + * The id *must* have been previously allocated by + * devlink_region_snapshot_id_get(). + * + * Returns 0 on success, or an error on failure. + */ +static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id) +{ + unsigned long count; + void *p; + + lockdep_assert_held(&devlink->lock); + + p = xa_load(&devlink->snapshot_ids, id); + if (WARN_ON(!p)) + return -EINVAL; + + if (WARN_ON(!xa_is_value(p))) + return -EINVAL; + + count = xa_to_value(p); + count++; + + return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count), + GFP_KERNEL)); +} + +/** + * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id + * @devlink: devlink instance + * @id: the snapshot id + * + * Track when a snapshot is deleted and stops using an id. Load the count + * for the given id from the snapshot xarray, decrement it, and store it + * back. + * + * If the count reaches zero, erase this id from the xarray, freeing it + * up for future re-use by devlink_region_snapshot_id_get(). + * + * Called when a snapshot using the given id is deleted, and when the + * initial allocator of the id is finished using it. + */ +static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id) +{ + unsigned long count; + void *p; + + lockdep_assert_held(&devlink->lock); + + p = xa_load(&devlink->snapshot_ids, id); + if (WARN_ON(!p)) + return; + + if (WARN_ON(!xa_is_value(p))) + return; + + count = xa_to_value(p); + + if (count > 1) { + count--; + xa_store(&devlink->snapshot_ids, id, xa_mk_value(count), + GFP_KERNEL); + } else { + /* If this was the last user, we can erase this id */ + xa_erase(&devlink->snapshot_ids, id); + } +} + +/** + * __devlink_snapshot_id_insert - Insert a specific snapshot ID + * @devlink: devlink instance + * @id: the snapshot id + * + * Mark the given snapshot id as used by inserting a zero value into the + * snapshot xarray. + * + * This must be called while holding the devlink instance lock. Unlike + * devlink_snapshot_id_get, the initial reference count is zero, not one. + * It is expected that the id will immediately be used before + * releasing the devlink instance lock. + * + * Returns zero on success, or an error code if the snapshot id could not + * be inserted. + */ +static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id) +{ + lockdep_assert_held(&devlink->lock); + + if (xa_load(&devlink->snapshot_ids, id)) + return -EEXIST; + + return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0), + GFP_KERNEL)); +} + +/** + * __devlink_region_snapshot_id_get - get snapshot ID + * @devlink: devlink instance + * @id: storage to return snapshot id + * + * Allocates a new snapshot id. Returns zero on success, or a negative + * error on failure. Must be called while holding the devlink instance + * lock. + * + * Snapshot IDs are tracked using an xarray which stores the number of + * users of the snapshot id. + * + * Note that the caller of this function counts as a 'user', in order to + * avoid race conditions. The caller must release its hold on the + * snapshot by using devlink_region_snapshot_id_put. + */ +static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id) +{ + lockdep_assert_held(&devlink->lock); + + return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1), + xa_limit_32b, GFP_KERNEL); +} + +/** + * __devlink_region_snapshot_create - create a new snapshot + * This will add a new snapshot of a region. The snapshot + * will be stored on the region struct and can be accessed + * from devlink. This is useful for future analyses of snapshots. + * Multiple snapshots can be created on a region. + * The @snapshot_id should be obtained using the getter function. + * + * Must be called only while holding the devlink instance lock. + * + * @region: devlink region of the snapshot + * @data: snapshot data + * @snapshot_id: snapshot id to be created + */ +static int +__devlink_region_snapshot_create(struct devlink_region *region, + u8 *data, u32 snapshot_id) +{ + struct devlink *devlink = region->devlink; + struct devlink_snapshot *snapshot; + int err; + + lockdep_assert_held(&devlink->lock); + + /* check if region can hold one more snapshot */ + if (region->cur_snapshots == region->max_snapshots) + return -ENOSPC; + + if (devlink_region_snapshot_get_by_id(region, snapshot_id)) + return -EEXIST; + + snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL); + if (!snapshot) + return -ENOMEM; + + err = __devlink_snapshot_id_increment(devlink, snapshot_id); + if (err) + goto err_snapshot_id_increment; + + snapshot->id = snapshot_id; + snapshot->region = region; + snapshot->data = data; + + list_add_tail(&snapshot->list, ®ion->snapshot_list); + + region->cur_snapshots++; + + devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW); + return 0; + +err_snapshot_id_increment: + kfree(snapshot); + return err; +} + +static void devlink_region_snapshot_del(struct devlink_region *region, + struct devlink_snapshot *snapshot) +{ + struct devlink *devlink = region->devlink; + + lockdep_assert_held(&devlink->lock); + + devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL); + region->cur_snapshots--; + list_del(&snapshot->list); + region->ops->destructor(snapshot->data); + __devlink_snapshot_id_decrement(devlink, snapshot->id); + kfree(snapshot); +} + +static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_port *port = NULL; + struct devlink_region *region; + const char *region_name; + struct sk_buff *msg; + unsigned int index; + int err; + + if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) + return -EINVAL; + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET, + info->snd_portid, info->snd_seq, 0, + region); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg, + struct netlink_callback *cb, + struct devlink_port *port, + int *idx, + int start) +{ + struct devlink_region *region; + int err = 0; + + list_for_each_entry(region, &port->region_list, list) { + if (*idx < start) { + (*idx)++; + continue; + } + err = devlink_nl_region_fill(msg, port->devlink, + DEVLINK_CMD_REGION_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, region); + if (err) + goto out; + (*idx)++; + } + +out: + return err; +} + +static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg, + struct netlink_callback *cb, + struct devlink *devlink, + int *idx, + int start) +{ + struct devlink_region *region; + struct devlink_port *port; + int err = 0; + + mutex_lock(&devlink->lock); + list_for_each_entry(region, &devlink->region_list, list) { + if (*idx < start) { + (*idx)++; + continue; + } + err = devlink_nl_region_fill(msg, devlink, + DEVLINK_CMD_REGION_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, region); + if (err) + goto out; + (*idx)++; + } + + list_for_each_entry(port, &devlink->port_list, list) { + err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, idx, + start); + if (err) + goto out; + } + +out: + mutex_unlock(&devlink->lock); + return err; +} + +static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + err = devlink_nl_cmd_region_get_devlink_dumpit(msg, cb, devlink, + &idx, start); + if (err) + goto out; + } +out: + mutex_unlock(&devlink_mutex); + cb->args[0] = idx; + return msg->len; +} + +static int devlink_nl_cmd_region_del(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_snapshot *snapshot; + struct devlink_port *port = NULL; + struct devlink_region *region; + const char *region_name; + unsigned int index; + u32 snapshot_id; + + if (!info->attrs[DEVLINK_ATTR_REGION_NAME] || + !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) + return -EINVAL; + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]); + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) + return -EINVAL; + + snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id); + if (!snapshot) + return -EINVAL; + + devlink_region_snapshot_del(region, snapshot); + return 0; +} + +static int +devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_snapshot *snapshot; + struct devlink_port *port = NULL; + struct nlattr *snapshot_id_attr; + struct devlink_region *region; + const char *region_name; + unsigned int index; + u32 snapshot_id; + u8 *data; + int err; + + if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) { + NL_SET_ERR_MSG_MOD(info->extack, "No region name provided"); + return -EINVAL; + } + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) { + NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist"); + return -EINVAL; + } + + if (!region->ops->snapshot) { + NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot"); + return -EOPNOTSUPP; + } + + if (region->cur_snapshots == region->max_snapshots) { + NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots"); + return -ENOSPC; + } + + snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]; + if (snapshot_id_attr) { + snapshot_id = nla_get_u32(snapshot_id_attr); + + if (devlink_region_snapshot_get_by_id(region, snapshot_id)) { + NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use"); + return -EEXIST; + } + + err = __devlink_snapshot_id_insert(devlink, snapshot_id); + if (err) + return err; + } else { + err = __devlink_region_snapshot_id_get(devlink, &snapshot_id); + if (err) { + NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id"); + return err; + } + } + + if (port) + err = region->port_ops->snapshot(port, region->port_ops, + info->extack, &data); + else + err = region->ops->snapshot(devlink, region->ops, + info->extack, &data); + if (err) + goto err_snapshot_capture; + + err = __devlink_region_snapshot_create(region, data, snapshot_id); + if (err) + goto err_snapshot_create; + + if (!snapshot_id_attr) { + struct sk_buff *msg; + + snapshot = devlink_region_snapshot_get_by_id(region, + snapshot_id); + if (WARN_ON(!snapshot)) + return -EINVAL; + + msg = devlink_nl_region_notify_build(region, snapshot, + DEVLINK_CMD_REGION_NEW, + info->snd_portid, + info->snd_seq); + err = PTR_ERR_OR_ZERO(msg); + if (err) + goto err_notify; + + err = genlmsg_reply(msg, info); + if (err) + goto err_notify; + } + + return 0; + +err_snapshot_create: + region->ops->destructor(data); +err_snapshot_capture: + __devlink_snapshot_id_decrement(devlink, snapshot_id); + return err; + +err_notify: + devlink_region_snapshot_del(region, snapshot); + return err; +} + +static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg, + struct devlink *devlink, + u8 *chunk, u32 chunk_size, + u64 addr) +{ + struct nlattr *chunk_attr; + int err; + + chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK); + if (!chunk_attr) + return -EINVAL; + + err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk); + if (err) + goto nla_put_failure; + + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr, + DEVLINK_ATTR_PAD); + if (err) + goto nla_put_failure; + + nla_nest_end(msg, chunk_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, chunk_attr); + return err; +} + +#define DEVLINK_REGION_READ_CHUNK_SIZE 256 + +static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb, + struct devlink *devlink, + struct devlink_region *region, + struct nlattr **attrs, + u64 start_offset, + u64 end_offset, + u64 *new_offset) +{ + struct devlink_snapshot *snapshot; + u64 curr_offset = start_offset; + u32 snapshot_id; + int err = 0; + + *new_offset = start_offset; + + snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]); + snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id); + if (!snapshot) + return -EINVAL; + + while (curr_offset < end_offset) { + u32 data_size; + u8 *data; + + if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE) + data_size = end_offset - curr_offset; + else + data_size = DEVLINK_REGION_READ_CHUNK_SIZE; + + data = &snapshot->data[curr_offset]; + err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink, + data, data_size, + curr_offset); + if (err) + break; + + curr_offset += data_size; + } + *new_offset = curr_offset; + + return err; +} + +static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + const struct genl_dumpit_info *info = genl_dumpit_info(cb); + u64 ret_offset, start_offset, end_offset = U64_MAX; + struct nlattr **attrs = info->attrs; + struct devlink_port *port = NULL; + struct devlink_region *region; + struct nlattr *chunks_attr; + const char *region_name; + struct devlink *devlink; + unsigned int index; + void *hdr; + int err; + + start_offset = *((u64 *)&cb->args[0]); + + mutex_lock(&devlink_mutex); + devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs); + if (IS_ERR(devlink)) { + err = PTR_ERR(devlink); + goto out_dev; + } + + mutex_lock(&devlink->lock); + + if (!attrs[DEVLINK_ATTR_REGION_NAME] || + !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) { + err = -EINVAL; + goto out_unlock; + } + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) { + err = -ENODEV; + goto out_unlock; + } + } + + region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]); + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) { + err = -EINVAL; + goto out_unlock; + } + + if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] && + attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) { + if (!start_offset) + start_offset = + nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]); + + end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]); + end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]); + } + + if (end_offset > region->size) + end_offset = region->size; + + /* return 0 if there is no further data to read */ + if (start_offset == end_offset) { + err = 0; + goto out_unlock; + } + + hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, + DEVLINK_CMD_REGION_READ); + if (!hdr) { + err = -EMSGSIZE; + goto out_unlock; + } + + err = devlink_nl_put_handle(skb, devlink); + if (err) + goto nla_put_failure; + + if (region->port) { + err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto nla_put_failure; + } + + err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name); + if (err) + goto nla_put_failure; + + chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS); + if (!chunks_attr) { + err = -EMSGSIZE; + goto nla_put_failure; + } + + err = devlink_nl_region_read_snapshot_fill(skb, devlink, + region, attrs, + start_offset, + end_offset, &ret_offset); + + if (err && err != -EMSGSIZE) + goto nla_put_failure; + + /* Check if there was any progress done to prevent infinite loop */ + if (ret_offset == start_offset) { + err = -EINVAL; + goto nla_put_failure; + } + + *((u64 *)&cb->args[0]) = ret_offset; + + nla_nest_end(skb, chunks_attr); + genlmsg_end(skb, hdr); + mutex_unlock(&devlink->lock); + mutex_unlock(&devlink_mutex); + + return skb->len; + +nla_put_failure: + genlmsg_cancel(skb, hdr); +out_unlock: + mutex_unlock(&devlink->lock); +out_dev: + mutex_unlock(&devlink_mutex); + return err; +} + +struct devlink_info_req { + struct sk_buff *msg; +}; + +int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name) +{ + return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name); +} +EXPORT_SYMBOL_GPL(devlink_info_driver_name_put); + +int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn) +{ + return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn); +} +EXPORT_SYMBOL_GPL(devlink_info_serial_number_put); + +int devlink_info_board_serial_number_put(struct devlink_info_req *req, + const char *bsn) +{ + return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER, + bsn); +} +EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put); + +static int devlink_info_version_put(struct devlink_info_req *req, int attr, + const char *version_name, + const char *version_value) +{ + struct nlattr *nest; + int err; + + nest = nla_nest_start_noflag(req->msg, attr); + if (!nest) + return -EMSGSIZE; + + err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME, + version_name); + if (err) + goto nla_put_failure; + + err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE, + version_value); + if (err) + goto nla_put_failure; + + nla_nest_end(req->msg, nest); + + return 0; + +nla_put_failure: + nla_nest_cancel(req->msg, nest); + return err; +} + +int devlink_info_version_fixed_put(struct devlink_info_req *req, + const char *version_name, + const char *version_value) +{ + return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED, + version_name, version_value); +} +EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put); + +int devlink_info_version_stored_put(struct devlink_info_req *req, + const char *version_name, + const char *version_value) +{ + return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED, + version_name, version_value); +} +EXPORT_SYMBOL_GPL(devlink_info_version_stored_put); + +int devlink_info_version_running_put(struct devlink_info_req *req, + const char *version_name, + const char *version_value) +{ + return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING, + version_name, version_value); +} +EXPORT_SYMBOL_GPL(devlink_info_version_running_put); + +static int +devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink, + enum devlink_command cmd, u32 portid, + u32 seq, int flags, struct netlink_ext_ack *extack) +{ + struct devlink_info_req req; + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + err = -EMSGSIZE; + if (devlink_nl_put_handle(msg, devlink)) + goto err_cancel_msg; + + req.msg = msg; + err = devlink->ops->info_get(devlink, &req, extack); + if (err) + goto err_cancel_msg; + + genlmsg_end(msg, hdr); + return 0; + +err_cancel_msg: + genlmsg_cancel(msg, hdr); + return err; +} + +static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct sk_buff *msg; + int err; + + if (!devlink->ops->info_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET, + info->snd_portid, info->snd_seq, 0, + info->extack); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err = 0; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + if (idx < start) { + idx++; + continue; + } + + if (!devlink->ops->info_get) { + idx++; + continue; + } + + mutex_lock(&devlink->lock); + err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, NLM_F_MULTI, + cb->extack); + mutex_unlock(&devlink->lock); + if (err == -EOPNOTSUPP) + err = 0; + else if (err) + break; + idx++; + } + mutex_unlock(&devlink_mutex); + + if (err != -EMSGSIZE) + return err; + + cb->args[0] = idx; + return msg->len; +} + +struct devlink_fmsg_item { + struct list_head list; + int attrtype; + u8 nla_type; + u16 len; + int value[]; +}; + +struct devlink_fmsg { + struct list_head item_list; + bool putting_binary; /* This flag forces enclosing of binary data + * in an array brackets. It forces using + * of designated API: + * devlink_fmsg_binary_pair_nest_start() + * devlink_fmsg_binary_pair_nest_end() + */ +}; + +static struct devlink_fmsg *devlink_fmsg_alloc(void) +{ + struct devlink_fmsg *fmsg; + + fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL); + if (!fmsg) + return NULL; + + INIT_LIST_HEAD(&fmsg->item_list); + + return fmsg; +} + +static void devlink_fmsg_free(struct devlink_fmsg *fmsg) +{ + struct devlink_fmsg_item *item, *tmp; + + list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) { + list_del(&item->list); + kfree(item); + } + kfree(fmsg); +} + +static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg, + int attrtype) +{ + struct devlink_fmsg_item *item; + + item = kzalloc(sizeof(*item), GFP_KERNEL); + if (!item) + return -ENOMEM; + + item->attrtype = attrtype; + list_add_tail(&item->list, &fmsg->item_list); + + return 0; +} + +int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start); + +static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END); +} + +int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_nest_end(fmsg); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end); + +#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN) + +static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name) +{ + struct devlink_fmsg_item *item; + + if (fmsg->putting_binary) + return -EINVAL; + + if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE) + return -EMSGSIZE; + + item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL); + if (!item) + return -ENOMEM; + + item->nla_type = NLA_NUL_STRING; + item->len = strlen(name) + 1; + item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME; + memcpy(&item->value, name, item->len); + list_add_tail(&item->list, &fmsg->item_list); + + return 0; +} + +int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name) +{ + int err; + + if (fmsg->putting_binary) + return -EINVAL; + + err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START); + if (err) + return err; + + err = devlink_fmsg_put_name(fmsg, name); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start); + +int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_nest_end(fmsg); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end); + +int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg, + const char *name) +{ + int err; + + if (fmsg->putting_binary) + return -EINVAL; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start); + +int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg) +{ + int err; + + if (fmsg->putting_binary) + return -EINVAL; + + err = devlink_fmsg_nest_end(fmsg); + if (err) + return err; + + err = devlink_fmsg_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end); + +int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg, + const char *name) +{ + int err; + + err = devlink_fmsg_arr_pair_nest_start(fmsg, name); + if (err) + return err; + + fmsg->putting_binary = true; + return err; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start); + +int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg) +{ + if (!fmsg->putting_binary) + return -EINVAL; + + fmsg->putting_binary = false; + return devlink_fmsg_arr_pair_nest_end(fmsg); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end); + +static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg, + const void *value, u16 value_len, + u8 value_nla_type) +{ + struct devlink_fmsg_item *item; + + if (value_len > DEVLINK_FMSG_MAX_SIZE) + return -EMSGSIZE; + + item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL); + if (!item) + return -ENOMEM; + + item->nla_type = value_nla_type; + item->len = value_len; + item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA; + memcpy(&item->value, value, item->len); + list_add_tail(&item->list, &fmsg->item_list); + + return 0; +} + +int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put); + +int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put); + +int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put); + +int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put); + +int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value) +{ + if (fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1, + NLA_NUL_STRING); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_string_put); + +int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value, + u16 value_len) +{ + if (!fmsg->putting_binary) + return -EINVAL; + + return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY); +} +EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put); + +int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name, + bool value) +{ + int err; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_bool_put(fmsg, value); + if (err) + return err; + + err = devlink_fmsg_pair_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put); + +int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name, + u8 value) +{ + int err; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_u8_put(fmsg, value); + if (err) + return err; + + err = devlink_fmsg_pair_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put); + +int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name, + u32 value) +{ + int err; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_u32_put(fmsg, value); + if (err) + return err; + + err = devlink_fmsg_pair_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put); + +int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name, + u64 value) +{ + int err; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_u64_put(fmsg, value); + if (err) + return err; + + err = devlink_fmsg_pair_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put); + +int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name, + const char *value) +{ + int err; + + err = devlink_fmsg_pair_nest_start(fmsg, name); + if (err) + return err; + + err = devlink_fmsg_string_put(fmsg, value); + if (err) + return err; + + err = devlink_fmsg_pair_nest_end(fmsg); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put); + +int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name, + const void *value, u32 value_len) +{ + u32 data_size; + int end_err; + u32 offset; + int err; + + err = devlink_fmsg_binary_pair_nest_start(fmsg, name); + if (err) + return err; + + for (offset = 0; offset < value_len; offset += data_size) { + data_size = value_len - offset; + if (data_size > DEVLINK_FMSG_MAX_SIZE) + data_size = DEVLINK_FMSG_MAX_SIZE; + err = devlink_fmsg_binary_put(fmsg, value + offset, data_size); + if (err) + break; + /* Exit from loop with a break (instead of + * return) to make sure putting_binary is turned off in + * devlink_fmsg_binary_pair_nest_end + */ + } + + end_err = devlink_fmsg_binary_pair_nest_end(fmsg); + if (end_err) + err = end_err; + + return err; +} +EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put); + +static int +devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb) +{ + switch (msg->nla_type) { + case NLA_FLAG: + case NLA_U8: + case NLA_U32: + case NLA_U64: + case NLA_NUL_STRING: + case NLA_BINARY: + return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE, + msg->nla_type); + default: + return -EINVAL; + } +} + +static int +devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb) +{ + int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA; + u8 tmp; + + switch (msg->nla_type) { + case NLA_FLAG: + /* Always provide flag data, regardless of its value */ + tmp = *(bool *) msg->value; + + return nla_put_u8(skb, attrtype, tmp); + case NLA_U8: + return nla_put_u8(skb, attrtype, *(u8 *) msg->value); + case NLA_U32: + return nla_put_u32(skb, attrtype, *(u32 *) msg->value); + case NLA_U64: + return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value, + DEVLINK_ATTR_PAD); + case NLA_NUL_STRING: + return nla_put_string(skb, attrtype, (char *) &msg->value); + case NLA_BINARY: + return nla_put(skb, attrtype, msg->len, (void *) &msg->value); + default: + return -EINVAL; + } +} + +static int +devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb, + int *start) +{ + struct devlink_fmsg_item *item; + struct nlattr *fmsg_nlattr; + int i = 0; + int err; + + fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG); + if (!fmsg_nlattr) + return -EMSGSIZE; + + list_for_each_entry(item, &fmsg->item_list, list) { + if (i < *start) { + i++; + continue; + } + + switch (item->attrtype) { + case DEVLINK_ATTR_FMSG_OBJ_NEST_START: + case DEVLINK_ATTR_FMSG_PAIR_NEST_START: + case DEVLINK_ATTR_FMSG_ARR_NEST_START: + case DEVLINK_ATTR_FMSG_NEST_END: + err = nla_put_flag(skb, item->attrtype); + break; + case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA: + err = devlink_fmsg_item_fill_type(item, skb); + if (err) + break; + err = devlink_fmsg_item_fill_data(item, skb); + break; + case DEVLINK_ATTR_FMSG_OBJ_NAME: + err = nla_put_string(skb, item->attrtype, + (char *) &item->value); + break; + default: + err = -EINVAL; + break; + } + if (!err) + *start = ++i; + else + break; + } + + nla_nest_end(skb, fmsg_nlattr); + return err; +} + +static int devlink_fmsg_snd(struct devlink_fmsg *fmsg, + struct genl_info *info, + enum devlink_command cmd, int flags) +{ + struct nlmsghdr *nlh; + struct sk_buff *skb; + bool last = false; + int index = 0; + void *hdr; + int err; + + while (!last) { + int tmp_index = index; + + skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, flags | NLM_F_MULTI, cmd); + if (!hdr) { + err = -EMSGSIZE; + goto nla_put_failure; + } + + err = devlink_fmsg_prepare_skb(fmsg, skb, &index); + if (!err) + last = true; + else if (err != -EMSGSIZE || tmp_index == index) + goto nla_put_failure; + + genlmsg_end(skb, hdr); + err = genlmsg_reply(skb, info); + if (err) + return err; + } + + skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!skb) + return -ENOMEM; + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = -EMSGSIZE; + goto nla_put_failure; + } + + return genlmsg_reply(skb, info); + +nla_put_failure: + nlmsg_free(skb); + return err; +} + +static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb, + struct netlink_callback *cb, + enum devlink_command cmd) +{ + int index = cb->args[0]; + int tmp_index = index; + void *hdr; + int err; + + hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd); + if (!hdr) { + err = -EMSGSIZE; + goto nla_put_failure; + } + + err = devlink_fmsg_prepare_skb(fmsg, skb, &index); + if ((err && err != -EMSGSIZE) || tmp_index == index) + goto nla_put_failure; + + cb->args[0] = index; + genlmsg_end(skb, hdr); + return skb->len; + +nla_put_failure: + genlmsg_cancel(skb, hdr); + return err; +} + +struct devlink_health_reporter { + struct list_head list; + void *priv; + const struct devlink_health_reporter_ops *ops; + struct devlink *devlink; + struct devlink_port *devlink_port; + struct devlink_fmsg *dump_fmsg; + struct mutex dump_lock; /* lock parallel read/write from dump buffers */ + u64 graceful_period; + bool auto_recover; + bool auto_dump; + u8 health_state; + u64 dump_ts; + u64 dump_real_ts; + u64 error_count; + u64 recovery_count; + u64 last_recovery_ts; + refcount_t refcount; +}; + +void * +devlink_health_reporter_priv(struct devlink_health_reporter *reporter) +{ + return reporter->priv; +} +EXPORT_SYMBOL_GPL(devlink_health_reporter_priv); + +static struct devlink_health_reporter * +__devlink_health_reporter_find_by_name(struct list_head *reporter_list, + struct mutex *list_lock, + const char *reporter_name) +{ + struct devlink_health_reporter *reporter; + + lockdep_assert_held(list_lock); + list_for_each_entry(reporter, reporter_list, list) + if (!strcmp(reporter->ops->name, reporter_name)) + return reporter; + return NULL; +} + +static struct devlink_health_reporter * +devlink_health_reporter_find_by_name(struct devlink *devlink, + const char *reporter_name) +{ + return __devlink_health_reporter_find_by_name(&devlink->reporter_list, + &devlink->reporters_lock, + reporter_name); +} + +static struct devlink_health_reporter * +devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port, + const char *reporter_name) +{ + return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list, + &devlink_port->reporters_lock, + reporter_name); +} + +static struct devlink_health_reporter * +__devlink_health_reporter_create(struct devlink *devlink, + const struct devlink_health_reporter_ops *ops, + u64 graceful_period, void *priv) +{ + struct devlink_health_reporter *reporter; + + if (WARN_ON(graceful_period && !ops->recover)) + return ERR_PTR(-EINVAL); + + reporter = kzalloc(sizeof(*reporter), GFP_KERNEL); + if (!reporter) + return ERR_PTR(-ENOMEM); + + reporter->priv = priv; + reporter->ops = ops; + reporter->devlink = devlink; + reporter->graceful_period = graceful_period; + reporter->auto_recover = !!ops->recover; + reporter->auto_dump = !!ops->dump; + mutex_init(&reporter->dump_lock); + refcount_set(&reporter->refcount, 1); + return reporter; +} + +/** + * devlink_port_health_reporter_create - create devlink health reporter for + * specified port instance + * + * @port: devlink_port which should contain the new reporter + * @ops: ops + * @graceful_period: to avoid recovery loops, in msecs + * @priv: priv + */ +struct devlink_health_reporter * +devlink_port_health_reporter_create(struct devlink_port *port, + const struct devlink_health_reporter_ops *ops, + u64 graceful_period, void *priv) +{ + struct devlink_health_reporter *reporter; + + mutex_lock(&port->reporters_lock); + if (__devlink_health_reporter_find_by_name(&port->reporter_list, + &port->reporters_lock, ops->name)) { + reporter = ERR_PTR(-EEXIST); + goto unlock; + } + + reporter = __devlink_health_reporter_create(port->devlink, ops, + graceful_period, priv); + if (IS_ERR(reporter)) + goto unlock; + + reporter->devlink_port = port; + list_add_tail(&reporter->list, &port->reporter_list); +unlock: + mutex_unlock(&port->reporters_lock); + return reporter; +} +EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create); + +/** + * devlink_health_reporter_create - create devlink health reporter + * + * @devlink: devlink + * @ops: ops + * @graceful_period: to avoid recovery loops, in msecs + * @priv: priv + */ +struct devlink_health_reporter * +devlink_health_reporter_create(struct devlink *devlink, + const struct devlink_health_reporter_ops *ops, + u64 graceful_period, void *priv) +{ + struct devlink_health_reporter *reporter; + + mutex_lock(&devlink->reporters_lock); + if (devlink_health_reporter_find_by_name(devlink, ops->name)) { + reporter = ERR_PTR(-EEXIST); + goto unlock; + } + + reporter = __devlink_health_reporter_create(devlink, ops, + graceful_period, priv); + if (IS_ERR(reporter)) + goto unlock; + + list_add_tail(&reporter->list, &devlink->reporter_list); +unlock: + mutex_unlock(&devlink->reporters_lock); + return reporter; +} +EXPORT_SYMBOL_GPL(devlink_health_reporter_create); + +static void +devlink_health_reporter_free(struct devlink_health_reporter *reporter) +{ + mutex_destroy(&reporter->dump_lock); + if (reporter->dump_fmsg) + devlink_fmsg_free(reporter->dump_fmsg); + kfree(reporter); +} + +static void +devlink_health_reporter_put(struct devlink_health_reporter *reporter) +{ + if (refcount_dec_and_test(&reporter->refcount)) + devlink_health_reporter_free(reporter); +} + +static void +__devlink_health_reporter_destroy(struct devlink_health_reporter *reporter) +{ + list_del(&reporter->list); + devlink_health_reporter_put(reporter); +} + +/** + * devlink_health_reporter_destroy - destroy devlink health reporter + * + * @reporter: devlink health reporter to destroy + */ +void +devlink_health_reporter_destroy(struct devlink_health_reporter *reporter) +{ + struct mutex *lock = &reporter->devlink->reporters_lock; + + mutex_lock(lock); + __devlink_health_reporter_destroy(reporter); + mutex_unlock(lock); +} +EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy); + +/** + * devlink_port_health_reporter_destroy - destroy devlink port health reporter + * + * @reporter: devlink health reporter to destroy + */ +void +devlink_port_health_reporter_destroy(struct devlink_health_reporter *reporter) +{ + struct mutex *lock = &reporter->devlink_port->reporters_lock; + + mutex_lock(lock); + __devlink_health_reporter_destroy(reporter); + mutex_unlock(lock); +} +EXPORT_SYMBOL_GPL(devlink_port_health_reporter_destroy); + +static int +devlink_nl_health_reporter_fill(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_health_reporter *reporter, + enum devlink_command cmd, u32 portid, + u32 seq, int flags) +{ + struct nlattr *reporter_attr; + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto genlmsg_cancel; + + if (reporter->devlink_port) { + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index)) + goto genlmsg_cancel; + } + reporter_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_HEALTH_REPORTER); + if (!reporter_attr) + goto genlmsg_cancel; + if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME, + reporter->ops->name)) + goto reporter_nest_cancel; + if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE, + reporter->health_state)) + goto reporter_nest_cancel; + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT, + reporter->error_count, DEVLINK_ATTR_PAD)) + goto reporter_nest_cancel; + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT, + reporter->recovery_count, DEVLINK_ATTR_PAD)) + goto reporter_nest_cancel; + if (reporter->ops->recover && + nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD, + reporter->graceful_period, + DEVLINK_ATTR_PAD)) + goto reporter_nest_cancel; + if (reporter->ops->recover && + nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER, + reporter->auto_recover)) + goto reporter_nest_cancel; + if (reporter->dump_fmsg && + nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS, + jiffies_to_msecs(reporter->dump_ts), + DEVLINK_ATTR_PAD)) + goto reporter_nest_cancel; + if (reporter->dump_fmsg && + nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS, + reporter->dump_real_ts, DEVLINK_ATTR_PAD)) + goto reporter_nest_cancel; + if (reporter->ops->dump && + nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP, + reporter->auto_dump)) + goto reporter_nest_cancel; + + nla_nest_end(msg, reporter_attr); + genlmsg_end(msg, hdr); + return 0; + +reporter_nest_cancel: + nla_nest_end(msg, reporter_attr); +genlmsg_cancel: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_recover_notify(struct devlink_health_reporter *reporter, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_health_reporter_fill(msg, reporter->devlink, + reporter, cmd, 0, 0, 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, + devlink_net(reporter->devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +void +devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter) +{ + reporter->recovery_count++; + reporter->last_recovery_ts = jiffies; +} +EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done); + +static int +devlink_health_reporter_recover(struct devlink_health_reporter *reporter, + void *priv_ctx, struct netlink_ext_ack *extack) +{ + int err; + + if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY) + return 0; + + if (!reporter->ops->recover) + return -EOPNOTSUPP; + + err = reporter->ops->recover(reporter, priv_ctx, extack); + if (err) + return err; + + devlink_health_reporter_recovery_done(reporter); + reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY; + devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER); + + return 0; +} + +static void +devlink_health_dump_clear(struct devlink_health_reporter *reporter) +{ + if (!reporter->dump_fmsg) + return; + devlink_fmsg_free(reporter->dump_fmsg); + reporter->dump_fmsg = NULL; +} + +static int devlink_health_do_dump(struct devlink_health_reporter *reporter, + void *priv_ctx, + struct netlink_ext_ack *extack) +{ + int err; + + if (!reporter->ops->dump) + return 0; + + if (reporter->dump_fmsg) + return 0; + + reporter->dump_fmsg = devlink_fmsg_alloc(); + if (!reporter->dump_fmsg) { + err = -ENOMEM; + return err; + } + + err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg); + if (err) + goto dump_err; + + err = reporter->ops->dump(reporter, reporter->dump_fmsg, + priv_ctx, extack); + if (err) + goto dump_err; + + err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg); + if (err) + goto dump_err; + + reporter->dump_ts = jiffies; + reporter->dump_real_ts = ktime_get_real_ns(); + + return 0; + +dump_err: + devlink_health_dump_clear(reporter); + return err; +} + +int devlink_health_report(struct devlink_health_reporter *reporter, + const char *msg, void *priv_ctx) +{ + enum devlink_health_reporter_state prev_health_state; + struct devlink *devlink = reporter->devlink; + unsigned long recover_ts_threshold; + + /* write a log message of the current error */ + WARN_ON(!msg); + trace_devlink_health_report(devlink, reporter->ops->name, msg); + reporter->error_count++; + prev_health_state = reporter->health_state; + reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR; + devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER); + + /* abort if the previous error wasn't recovered */ + recover_ts_threshold = reporter->last_recovery_ts + + msecs_to_jiffies(reporter->graceful_period); + if (reporter->auto_recover && + (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY || + (reporter->last_recovery_ts && reporter->recovery_count && + time_is_after_jiffies(recover_ts_threshold)))) { + trace_devlink_health_recover_aborted(devlink, + reporter->ops->name, + reporter->health_state, + jiffies - + reporter->last_recovery_ts); + return -ECANCELED; + } + + reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR; + + if (reporter->auto_dump) { + mutex_lock(&reporter->dump_lock); + /* store current dump of current error, for later analysis */ + devlink_health_do_dump(reporter, priv_ctx, NULL); + mutex_unlock(&reporter->dump_lock); + } + + if (reporter->auto_recover) + return devlink_health_reporter_recover(reporter, + priv_ctx, NULL); + + return 0; +} +EXPORT_SYMBOL_GPL(devlink_health_report); + +static struct devlink_health_reporter * +devlink_health_reporter_get_from_attrs(struct devlink *devlink, + struct nlattr **attrs) +{ + struct devlink_health_reporter *reporter; + struct devlink_port *devlink_port; + char *reporter_name; + + if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]) + return NULL; + + reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]); + devlink_port = devlink_port_get_from_attrs(devlink, attrs); + if (IS_ERR(devlink_port)) { + mutex_lock(&devlink->reporters_lock); + reporter = devlink_health_reporter_find_by_name(devlink, reporter_name); + if (reporter) + refcount_inc(&reporter->refcount); + mutex_unlock(&devlink->reporters_lock); + } else { + mutex_lock(&devlink_port->reporters_lock); + reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name); + if (reporter) + refcount_inc(&reporter->refcount); + mutex_unlock(&devlink_port->reporters_lock); + } + + return reporter; +} + +static struct devlink_health_reporter * +devlink_health_reporter_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + return devlink_health_reporter_get_from_attrs(devlink, info->attrs); +} + +static struct devlink_health_reporter * +devlink_health_reporter_get_from_cb(struct netlink_callback *cb) +{ + const struct genl_dumpit_info *info = genl_dumpit_info(cb); + struct devlink_health_reporter *reporter; + struct nlattr **attrs = info->attrs; + struct devlink *devlink; + + mutex_lock(&devlink_mutex); + devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs); + if (IS_ERR(devlink)) + goto unlock; + + reporter = devlink_health_reporter_get_from_attrs(devlink, attrs); + mutex_unlock(&devlink_mutex); + return reporter; +unlock: + mutex_unlock(&devlink_mutex); + return NULL; +} + +void +devlink_health_reporter_state_update(struct devlink_health_reporter *reporter, + enum devlink_health_reporter_state state) +{ + if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY && + state != DEVLINK_HEALTH_REPORTER_STATE_ERROR)) + return; + + if (reporter->health_state == state) + return; + + reporter->health_state = state; + trace_devlink_health_reporter_state_update(reporter->devlink, + reporter->ops->name, state); + devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER); +} +EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update); + +static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + struct sk_buff *msg; + int err; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) { + err = -ENOMEM; + goto out; + } + + err = devlink_nl_health_reporter_fill(msg, devlink, reporter, + DEVLINK_CMD_HEALTH_REPORTER_GET, + info->snd_portid, info->snd_seq, + 0); + if (err) { + nlmsg_free(msg); + goto out; + } + + err = genlmsg_reply(msg, info); +out: + devlink_health_reporter_put(reporter); + return err; +} + +static int +devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink_health_reporter *reporter; + struct devlink_port *port; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->reporters_lock); + list_for_each_entry(reporter, &devlink->reporter_list, + list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_health_reporter_fill(msg, devlink, + reporter, + DEVLINK_CMD_HEALTH_REPORTER_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&devlink->reporters_lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->reporters_lock); + } + + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(port, &devlink->port_list, list) { + mutex_lock(&port->reporters_lock); + list_for_each_entry(reporter, &port->reporter_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_health_reporter_fill(msg, devlink, reporter, + DEVLINK_CMD_HEALTH_REPORTER_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&port->reporters_lock); + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&port->reporters_lock); + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +static int +devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + int err; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + if (!reporter->ops->recover && + (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] || + info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) { + err = -EOPNOTSUPP; + goto out; + } + if (!reporter->ops->dump && + info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) { + err = -EOPNOTSUPP; + goto out; + } + + if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]) + reporter->graceful_period = + nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]); + + if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]) + reporter->auto_recover = + nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]); + + if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) + reporter->auto_dump = + nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]); + + devlink_health_reporter_put(reporter); + return 0; +out: + devlink_health_reporter_put(reporter); + return err; +} + +static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + int err; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + err = devlink_health_reporter_recover(reporter, NULL, info->extack); + + devlink_health_reporter_put(reporter); + return err; +} + +static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + struct devlink_fmsg *fmsg; + int err; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + if (!reporter->ops->diagnose) { + devlink_health_reporter_put(reporter); + return -EOPNOTSUPP; + } + + fmsg = devlink_fmsg_alloc(); + if (!fmsg) { + devlink_health_reporter_put(reporter); + return -ENOMEM; + } + + err = devlink_fmsg_obj_nest_start(fmsg); + if (err) + goto out; + + err = reporter->ops->diagnose(reporter, fmsg, info->extack); + if (err) + goto out; + + err = devlink_fmsg_obj_nest_end(fmsg); + if (err) + goto out; + + err = devlink_fmsg_snd(fmsg, info, + DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0); + +out: + devlink_fmsg_free(fmsg); + devlink_health_reporter_put(reporter); + return err; +} + +static int +devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct devlink_health_reporter *reporter; + u64 start = cb->args[0]; + int err; + + reporter = devlink_health_reporter_get_from_cb(cb); + if (!reporter) + return -EINVAL; + + if (!reporter->ops->dump) { + err = -EOPNOTSUPP; + goto out; + } + mutex_lock(&reporter->dump_lock); + if (!start) { + err = devlink_health_do_dump(reporter, NULL, cb->extack); + if (err) + goto unlock; + cb->args[1] = reporter->dump_ts; + } + if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) { + NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry"); + err = -EAGAIN; + goto unlock; + } + + err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb, + DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET); +unlock: + mutex_unlock(&reporter->dump_lock); +out: + devlink_health_reporter_put(reporter); + return err; +} + +static int +devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + if (!reporter->ops->dump) { + devlink_health_reporter_put(reporter); + return -EOPNOTSUPP; + } + + mutex_lock(&reporter->dump_lock); + devlink_health_dump_clear(reporter); + mutex_unlock(&reporter->dump_lock); + devlink_health_reporter_put(reporter); + return 0; +} + +static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_health_reporter *reporter; + int err; + + reporter = devlink_health_reporter_get_from_info(devlink, info); + if (!reporter) + return -EINVAL; + + if (!reporter->ops->test) { + devlink_health_reporter_put(reporter); + return -EOPNOTSUPP; + } + + err = reporter->ops->test(reporter, info->extack); + + devlink_health_reporter_put(reporter); + return err; +} + +struct devlink_stats { + u64 rx_bytes; + u64 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_irq(&cpu_stats->syncp); + rx_packets = cpu_stats->rx_packets; + rx_bytes = cpu_stats->rx_bytes; + } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); + + stats->rx_packets += rx_packets; + stats->rx_bytes += rx_bytes; + } +} + +static int devlink_trap_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, + stats.rx_packets, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES, + 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, trap_item->stats); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_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_MOD(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_cmd_trap_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + struct devlink_trap_item *trap_item; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(trap_item, &devlink->trap_list, list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_trap_fill(msg, devlink, trap_item, + DEVLINK_CMD_TRAP_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +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_MOD(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_MOD(info->extack, "Invalid trap action"); + return -EINVAL; + } + + return __devlink_trap_action_set(devlink, trap_item, trap_action, + info->extack); +} + +static 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; + 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_MOD(extack, "Device did not register this trap"); + return -ENOENT; + } + + err = devlink_trap_action_set(devlink, trap_item, info); + if (err) + return err; + + return 0; +} + +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_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; +} + +static int devlink_nl_cmd_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_MOD(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_cmd_trap_group_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW; + struct devlink_trap_group_item *group_item; + u32 portid = NETLINK_CB(cb->skb).portid; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(group_item, &devlink->trap_group_list, + list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_trap_group_fill(msg, devlink, + group_item, cmd, + portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +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_MOD(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; + int err; + + if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) + return 0; + + if (!devlink->ops->trap_group_set) + return -EOPNOTSUPP; + + policer_item = group_item->policer_item; + if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) { + u32 policer_id; + + 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_MOD(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; +} + +static 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_MOD(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_MOD(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; +} + +static int devlink_nl_cmd_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_MOD(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_cmd_trap_policer_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW; + struct devlink_trap_policer_item *policer_item; + u32 portid = NETLINK_CB(cb->skb).portid; + struct devlink *devlink; + int start = cb->args[0]; + int idx = 0; + int err; + + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (!net_eq(devlink_net(devlink), sock_net(msg->sk))) + continue; + mutex_lock(&devlink->lock); + list_for_each_entry(policer_item, &devlink->trap_policer_list, + list) { + if (idx < start) { + idx++; + continue; + } + err = devlink_nl_trap_policer_fill(msg, devlink, + policer_item, cmd, + portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + mutex_unlock(&devlink->lock); + goto out; + } + idx++; + } + mutex_unlock(&devlink->lock); + } +out: + mutex_unlock(&devlink_mutex); + + cb->args[0] = idx; + return msg->len; +} + +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_MOD(extack, "Policer rate lower than limit"); + return -EINVAL; + } + + if (rate > policer_item->policer->max_rate) { + NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit"); + return -EINVAL; + } + + if (burst < policer_item->policer->min_burst) { + NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit"); + return -EINVAL; + } + + if (burst > policer_item->policer->max_burst) { + NL_SET_ERR_MSG_MOD(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; +} + +static 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_MOD(extack, "Device did not register this trap policer"); + return -ENOENT; + } + + return devlink_trap_policer_set(devlink, policer_item, info); +} + +static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { + [DEVLINK_ATTR_UNSPEC] = { .strict_start_type = + DEVLINK_ATTR_TRAP_POLICER_ID }, + [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 }, + [DEVLINK_ATTR_PORT_TYPE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_PORT_TYPE_AUTO, + DEVLINK_PORT_TYPE_IB), + [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 }, + [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 }, + [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 }, + [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 }, + [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 }, + [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 }, + [DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_ESWITCH_MODE_LEGACY, + DEVLINK_ESWITCH_MODE_SWITCHDEV), + [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 }, + [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64}, + [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64}, + [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 }, + [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 }, + [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 }, + [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 }, + [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 }, + [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 }, + [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK] = + NLA_POLICY_BITFIELD32(DEVLINK_SUPPORTED_FLASH_OVERWRITE_SECTIONS), + [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 }, + [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING }, + [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 }, + [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 }, + [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 }, + [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 }, + [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 }, + [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 }, + [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 }, + [DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED }, + [DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT, + DEVLINK_RELOAD_ACTION_MAX), + [DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK), +}; + +static const struct genl_small_ops devlink_nl_ops[] = { + { + .cmd = DEVLINK_CMD_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_get_doit, + .dumpit = devlink_nl_cmd_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_get_doit, + .dumpit = devlink_nl_cmd_port_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_PORT_SPLIT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_split_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_PORT_UNSPLIT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_unsplit_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_SB_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_get_doit, + .dumpit = devlink_nl_cmd_sb_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_POOL_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_pool_get_doit, + .dumpit = devlink_nl_cmd_sb_pool_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_POOL_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_pool_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_SB_PORT_POOL_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_port_pool_get_doit, + .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_PORT_POOL_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_port_pool_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit, + .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_occ_snapshot_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_occ_max_clear_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_ESWITCH_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_eswitch_get_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_ESWITCH_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_eswitch_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_DPIPE_TABLE_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_table_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_entries_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_headers_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_table_counters_set, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_RESOURCE_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_resource_set, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_RESOURCE_DUMP, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_resource_dump, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_RELOAD, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_reload, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_PARAM_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_param_get_doit, + .dumpit = devlink_nl_cmd_param_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PARAM_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_param_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_PORT_PARAM_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_param_get_doit, + .dumpit = devlink_nl_cmd_port_param_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_PARAM_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_param_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_REGION_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_get_doit, + .dumpit = devlink_nl_cmd_region_get_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_NEW, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_new, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_DEL, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_del, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_READ, + .validate = GENL_DONT_VALIDATE_STRICT | + GENL_DONT_VALIDATE_DUMP_STRICT, + .dumpit = devlink_nl_cmd_region_read_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_INFO_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_info_get_doit, + .dumpit = devlink_nl_cmd_info_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_get_doit, + .dumpit = devlink_nl_cmd_health_reporter_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_recover_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_diagnose_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET, + .validate = GENL_DONT_VALIDATE_STRICT | + GENL_DONT_VALIDATE_DUMP_STRICT, + .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_dump_clear_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_test_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT | + DEVLINK_NL_FLAG_NO_LOCK, + }, + { + .cmd = DEVLINK_CMD_FLASH_UPDATE, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_flash_update, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_GET, + .doit = devlink_nl_cmd_trap_get_doit, + .dumpit = devlink_nl_cmd_trap_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_SET, + .doit = devlink_nl_cmd_trap_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_GROUP_GET, + .doit = devlink_nl_cmd_trap_group_get_doit, + .dumpit = devlink_nl_cmd_trap_group_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_GROUP_SET, + .doit = devlink_nl_cmd_trap_group_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_POLICER_GET, + .doit = devlink_nl_cmd_trap_policer_get_doit, + .dumpit = devlink_nl_cmd_trap_policer_get_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_POLICER_SET, + .doit = devlink_nl_cmd_trap_policer_set_doit, + .flags = GENL_ADMIN_PERM, + }, +}; + +static struct genl_family devlink_nl_family __ro_after_init = { + .name = DEVLINK_GENL_NAME, + .version = DEVLINK_GENL_VERSION, + .maxattr = DEVLINK_ATTR_MAX, + .policy = devlink_nl_policy, + .netnsok = true, + .pre_doit = devlink_nl_pre_doit, + .post_doit = devlink_nl_post_doit, + .module = THIS_MODULE, + .small_ops = devlink_nl_ops, + .n_small_ops = ARRAY_SIZE(devlink_nl_ops), + .mcgrps = devlink_nl_mcgrps, + .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps), +}; + +static bool devlink_reload_actions_valid(const struct devlink_ops *ops) +{ + const struct devlink_reload_combination *comb; + int i; + + if (!devlink_reload_supported(ops)) { + if (WARN_ON(ops->reload_actions)) + return false; + return true; + } + + if (WARN_ON(!ops->reload_actions || + ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) || + ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX))) + return false; + + if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) || + ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX))) + return false; + + for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) { + comb = &devlink_reload_invalid_combinations[i]; + if (ops->reload_actions == BIT(comb->action) && + ops->reload_limits == BIT(comb->limit)) + return false; + } + return true; +} + +/** + * devlink_alloc - Allocate new devlink instance resources + * + * @ops: ops + * @priv_size: size of user private data + * + * Allocate new devlink instance resources, including devlink index + * and name. + */ +struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size) +{ + struct devlink *devlink; + + if (WARN_ON(!ops)) + return NULL; + + if (!devlink_reload_actions_valid(ops)) + return NULL; + + devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL); + if (!devlink) + return NULL; + devlink->ops = ops; + xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC); + __devlink_net_set(devlink, &init_net); + INIT_LIST_HEAD(&devlink->port_list); + INIT_LIST_HEAD(&devlink->sb_list); + INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list); + INIT_LIST_HEAD(&devlink->resource_list); + INIT_LIST_HEAD(&devlink->param_list); + INIT_LIST_HEAD(&devlink->region_list); + INIT_LIST_HEAD(&devlink->reporter_list); + INIT_LIST_HEAD(&devlink->trap_list); + INIT_LIST_HEAD(&devlink->trap_group_list); + INIT_LIST_HEAD(&devlink->trap_policer_list); + mutex_init(&devlink->lock); + mutex_init(&devlink->reporters_lock); + return devlink; +} +EXPORT_SYMBOL_GPL(devlink_alloc); + +/** + * devlink_register - Register devlink instance + * + * @devlink: devlink + * @dev: parent device + */ +int devlink_register(struct devlink *devlink, struct device *dev) +{ + devlink->dev = dev; + devlink->registered = true; + mutex_lock(&devlink_mutex); + list_add_tail(&devlink->list, &devlink_list); + devlink_notify(devlink, DEVLINK_CMD_NEW); + mutex_unlock(&devlink_mutex); + return 0; +} +EXPORT_SYMBOL_GPL(devlink_register); + +/** + * devlink_unregister - Unregister devlink instance + * + * @devlink: devlink + */ +void devlink_unregister(struct devlink *devlink) +{ + mutex_lock(&devlink_mutex); + WARN_ON(devlink_reload_supported(devlink->ops) && + devlink->reload_enabled); + devlink_notify(devlink, DEVLINK_CMD_DEL); + list_del(&devlink->list); + mutex_unlock(&devlink_mutex); +} +EXPORT_SYMBOL_GPL(devlink_unregister); + +/** + * devlink_reload_enable - Enable reload of devlink instance + * + * @devlink: devlink + * + * Should be called at end of device initialization + * process when reload operation is supported. + */ +void devlink_reload_enable(struct devlink *devlink) +{ + mutex_lock(&devlink_mutex); + devlink->reload_enabled = true; + mutex_unlock(&devlink_mutex); +} +EXPORT_SYMBOL_GPL(devlink_reload_enable); + +/** + * devlink_reload_disable - Disable reload of devlink instance + * + * @devlink: devlink + * + * Should be called at the beginning of device cleanup + * process when reload operation is supported. + */ +void devlink_reload_disable(struct devlink *devlink) +{ + mutex_lock(&devlink_mutex); + /* Mutex is taken which ensures that no reload operation is in + * progress while setting up forbidded flag. + */ + devlink->reload_enabled = false; + mutex_unlock(&devlink_mutex); +} +EXPORT_SYMBOL_GPL(devlink_reload_disable); + +/** + * devlink_free - Free devlink instance resources + * + * @devlink: devlink + */ +void devlink_free(struct devlink *devlink) +{ + mutex_destroy(&devlink->reporters_lock); + mutex_destroy(&devlink->lock); + WARN_ON(!list_empty(&devlink->trap_policer_list)); + WARN_ON(!list_empty(&devlink->trap_group_list)); + WARN_ON(!list_empty(&devlink->trap_list)); + WARN_ON(!list_empty(&devlink->reporter_list)); + WARN_ON(!list_empty(&devlink->region_list)); + WARN_ON(!list_empty(&devlink->param_list)); + WARN_ON(!list_empty(&devlink->resource_list)); + WARN_ON(!list_empty(&devlink->dpipe_table_list)); + WARN_ON(!list_empty(&devlink->sb_list)); + WARN_ON(!list_empty(&devlink->port_list)); + + xa_destroy(&devlink->snapshot_ids); + + kfree(devlink); +} +EXPORT_SYMBOL_GPL(devlink_free); + +static void devlink_port_type_warn(struct work_struct *work) +{ + struct devlink_port *port = container_of(to_delayed_work(work), + struct devlink_port, + type_warn_dw); + dev_warn(port->devlink->dev, "Type was not set for devlink port."); +} + +static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) +{ + /* Ignore CPU and DSA flavours. */ + return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && + devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && + devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; +} + +#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) + +static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) +{ + if (!devlink_port_type_should_warn(devlink_port)) + return; + /* Schedule a work to WARN in case driver does not set port + * type within timeout. + */ + schedule_delayed_work(&devlink_port->type_warn_dw, + DEVLINK_PORT_TYPE_WARN_TIMEOUT); +} + +static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) +{ + if (!devlink_port_type_should_warn(devlink_port)) + return; + cancel_delayed_work_sync(&devlink_port->type_warn_dw); +} + +/** + * devlink_port_register - Register devlink port + * + * @devlink: devlink + * @devlink_port: devlink port + * @port_index: driver-specific numerical identifier of the port + * + * Register devlink port with provided port index. User can use + * any indexing, even hw-related one. devlink_port structure + * is convenient to be embedded inside user driver private structure. + * Note that the caller should take care of zeroing the devlink_port + * structure. + */ +int devlink_port_register(struct devlink *devlink, + struct devlink_port *devlink_port, + unsigned int port_index) +{ + mutex_lock(&devlink->lock); + if (devlink_port_index_exists(devlink, port_index)) { + mutex_unlock(&devlink->lock); + return -EEXIST; + } + devlink_port->devlink = devlink; + devlink_port->index = port_index; + devlink_port->registered = true; + spin_lock_init(&devlink_port->type_lock); + INIT_LIST_HEAD(&devlink_port->reporter_list); + mutex_init(&devlink_port->reporters_lock); + list_add_tail(&devlink_port->list, &devlink->port_list); + INIT_LIST_HEAD(&devlink_port->param_list); + INIT_LIST_HEAD(&devlink_port->region_list); + mutex_unlock(&devlink->lock); + INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); + devlink_port_type_warn_schedule(devlink_port); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + return 0; +} +EXPORT_SYMBOL_GPL(devlink_port_register); + +/** + * devlink_port_unregister - Unregister devlink port + * + * @devlink_port: devlink port + */ +void devlink_port_unregister(struct devlink_port *devlink_port) +{ + struct devlink *devlink = devlink_port->devlink; + + devlink_port_type_warn_cancel(devlink_port); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); + mutex_lock(&devlink->lock); + list_del(&devlink_port->list); + mutex_unlock(&devlink->lock); + WARN_ON(!list_empty(&devlink_port->reporter_list)); + WARN_ON(!list_empty(&devlink_port->region_list)); + mutex_destroy(&devlink_port->reporters_lock); +} +EXPORT_SYMBOL_GPL(devlink_port_unregister); + +static void __devlink_port_type_set(struct devlink_port *devlink_port, + enum devlink_port_type type, + void *type_dev) +{ + if (WARN_ON(!devlink_port->registered)) + return; + devlink_port_type_warn_cancel(devlink_port); + spin_lock_bh(&devlink_port->type_lock); + devlink_port->type = type; + devlink_port->type_dev = type_dev; + spin_unlock_bh(&devlink_port->type_lock); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); +} + +static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, + struct net_device *netdev) +{ + const struct net_device_ops *ops = netdev->netdev_ops; + + /* If driver registers devlink port, it should set devlink port + * attributes accordingly so the compat functions are called + * and the original ops are not used. + */ + if (ops->ndo_get_phys_port_name) { + /* Some drivers use the same set of ndos for netdevs + * that have devlink_port registered and also for + * those who don't. Make sure that ndo_get_phys_port_name + * returns -EOPNOTSUPP here in case it is defined. + * Warn if not. + */ + char name[IFNAMSIZ]; + int err; + + err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); + WARN_ON(err != -EOPNOTSUPP); + } + if (ops->ndo_get_port_parent_id) { + /* Some drivers use the same set of ndos for netdevs + * that have devlink_port registered and also for + * those who don't. Make sure that ndo_get_port_parent_id + * returns -EOPNOTSUPP here in case it is defined. + * Warn if not. + */ + struct netdev_phys_item_id ppid; + int err; + + err = ops->ndo_get_port_parent_id(netdev, &ppid); + WARN_ON(err != -EOPNOTSUPP); + } +} + +/** + * devlink_port_type_eth_set - Set port type to Ethernet + * + * @devlink_port: devlink port + * @netdev: related netdevice + */ +void devlink_port_type_eth_set(struct devlink_port *devlink_port, + struct net_device *netdev) +{ + if (netdev) + devlink_port_type_netdev_checks(devlink_port, netdev); + else + dev_warn(devlink_port->devlink->dev, + "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", + devlink_port->index); + + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev); +} +EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); + +/** + * devlink_port_type_ib_set - Set port type to InfiniBand + * + * @devlink_port: devlink port + * @ibdev: related IB device + */ +void devlink_port_type_ib_set(struct devlink_port *devlink_port, + struct ib_device *ibdev) +{ + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); +} +EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); + +/** + * devlink_port_type_clear - Clear port type + * + * @devlink_port: devlink port + */ +void devlink_port_type_clear(struct devlink_port *devlink_port) +{ + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); + devlink_port_type_warn_schedule(devlink_port); +} +EXPORT_SYMBOL_GPL(devlink_port_type_clear); + +static int __devlink_port_attrs_set(struct devlink_port *devlink_port, + enum devlink_port_flavour flavour) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + + devlink_port->attrs_set = true; + attrs->flavour = flavour; + if (attrs->switch_id.id_len) { + devlink_port->switch_port = true; + if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) + attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; + } else { + devlink_port->switch_port = false; + } + return 0; +} + +/** + * devlink_port_attrs_set - Set port attributes + * + * @devlink_port: devlink port + * @attrs: devlink port attrs + */ +void devlink_port_attrs_set(struct devlink_port *devlink_port, + struct devlink_port_attrs *attrs) +{ + int ret; + + if (WARN_ON(devlink_port->registered)) + return; + devlink_port->attrs = *attrs; + ret = __devlink_port_attrs_set(devlink_port, attrs->flavour); + if (ret) + return; + WARN_ON(attrs->splittable && attrs->split); +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_set); + +/** + * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes + * + * @devlink_port: devlink port + * @controller: associated controller number for the devlink port instance + * @pf: associated PF for the devlink port instance + * @external: indicates if the port is for an external controller + */ +void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, + u16 pf, bool external) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int ret; + + if (WARN_ON(devlink_port->registered)) + return; + ret = __devlink_port_attrs_set(devlink_port, + DEVLINK_PORT_FLAVOUR_PCI_PF); + if (ret) + return; + attrs->pci_pf.controller = controller; + attrs->pci_pf.pf = pf; + attrs->pci_pf.external = external; +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); + +/** + * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes + * + * @devlink_port: devlink port + * @controller: associated controller number for the devlink port instance + * @pf: associated PF for the devlink port instance + * @vf: associated VF of a PF for the devlink port instance + * @external: indicates if the port is for an external controller + */ +void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, + u16 pf, u16 vf, bool external) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int ret; + + if (WARN_ON(devlink_port->registered)) + return; + ret = __devlink_port_attrs_set(devlink_port, + DEVLINK_PORT_FLAVOUR_PCI_VF); + if (ret) + return; + attrs->pci_vf.controller = controller; + attrs->pci_vf.pf = pf; + attrs->pci_vf.vf = vf; + attrs->pci_vf.external = external; +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); + +static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, + char *name, size_t len) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int n = 0; + + if (!devlink_port->attrs_set) + return -EOPNOTSUPP; + + switch (attrs->flavour) { + case DEVLINK_PORT_FLAVOUR_PHYSICAL: + if (!attrs->split) + n = snprintf(name, len, "p%u", attrs->phys.port_number); + else + n = snprintf(name, len, "p%us%u", + attrs->phys.port_number, + attrs->phys.split_subport_number); + break; + case DEVLINK_PORT_FLAVOUR_CPU: + case DEVLINK_PORT_FLAVOUR_DSA: + case DEVLINK_PORT_FLAVOUR_UNUSED: + /* As CPU and DSA ports do not have a netdevice associated + * case should not ever happen. + */ + WARN_ON(1); + return -EINVAL; + case DEVLINK_PORT_FLAVOUR_PCI_PF: + if (attrs->pci_pf.external) { + n = snprintf(name, len, "c%u", attrs->pci_pf.controller); + if (n >= len) + return -EINVAL; + len -= n; + name += n; + } + n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); + break; + case DEVLINK_PORT_FLAVOUR_PCI_VF: + if (attrs->pci_vf.external) { + n = snprintf(name, len, "c%u", attrs->pci_vf.controller); + if (n >= len) + return -EINVAL; + len -= n; + name += n; + } + n = snprintf(name, len, "pf%uvf%u", + attrs->pci_vf.pf, attrs->pci_vf.vf); + break; + case DEVLINK_PORT_FLAVOUR_VIRTUAL: + return -EOPNOTSUPP; + } + + if (n >= len) + return -EINVAL; + + return 0; +} + +int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, + u32 size, u16 ingress_pools_count, + u16 egress_pools_count, u16 ingress_tc_count, + u16 egress_tc_count) +{ + struct devlink_sb *devlink_sb; + int err = 0; + + mutex_lock(&devlink->lock); + if (devlink_sb_index_exists(devlink, sb_index)) { + err = -EEXIST; + goto unlock; + } + + devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL); + if (!devlink_sb) { + err = -ENOMEM; + goto unlock; + } + devlink_sb->index = sb_index; + devlink_sb->size = size; + devlink_sb->ingress_pools_count = ingress_pools_count; + devlink_sb->egress_pools_count = egress_pools_count; + devlink_sb->ingress_tc_count = ingress_tc_count; + devlink_sb->egress_tc_count = egress_tc_count; + list_add_tail(&devlink_sb->list, &devlink->sb_list); +unlock: + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_sb_register); + +void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index) +{ + struct devlink_sb *devlink_sb; + + mutex_lock(&devlink->lock); + devlink_sb = devlink_sb_get_by_index(devlink, sb_index); + WARN_ON(!devlink_sb); + list_del(&devlink_sb->list); + mutex_unlock(&devlink->lock); + kfree(devlink_sb); +} +EXPORT_SYMBOL_GPL(devlink_sb_unregister); + +/** + * devlink_dpipe_headers_register - register dpipe headers + * + * @devlink: devlink + * @dpipe_headers: dpipe header array + * + * Register the headers supported by hardware. + */ +int devlink_dpipe_headers_register(struct devlink *devlink, + struct devlink_dpipe_headers *dpipe_headers) +{ + mutex_lock(&devlink->lock); + devlink->dpipe_headers = dpipe_headers; + mutex_unlock(&devlink->lock); + return 0; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register); + +/** + * devlink_dpipe_headers_unregister - unregister dpipe headers + * + * @devlink: devlink + * + * Unregister the headers supported by hardware. + */ +void devlink_dpipe_headers_unregister(struct devlink *devlink) +{ + mutex_lock(&devlink->lock); + devlink->dpipe_headers = NULL; + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_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); + +/** + * devlink_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 devlink_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; + int err = 0; + + if (WARN_ON(!table_ops->size_get)) + return -EINVAL; + + mutex_lock(&devlink->lock); + + if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name, + devlink)) { + err = -EEXIST; + goto unlock; + } + + table = kzalloc(sizeof(*table), GFP_KERNEL); + if (!table) { + err = -ENOMEM; + goto unlock; + } + + 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); +unlock: + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_table_register); + +/** + * devlink_dpipe_table_unregister - unregister dpipe table + * + * @devlink: devlink + * @table_name: table name + */ +void devlink_dpipe_table_unregister(struct devlink *devlink, + const char *table_name) +{ + struct devlink_dpipe_table *table; + + mutex_lock(&devlink->lock); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + goto unlock; + list_del_rcu(&table->list); + mutex_unlock(&devlink->lock); + kfree_rcu(table, rcu); + return; +unlock: + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister); + +/** + * devlink_resource_register - devlink resource register + * + * @devlink: devlink + * @resource_name: resource's name + * @resource_size: resource's size + * @resource_id: resource's id + * @parent_resource_id: resource's parent id + * @size_params: size parameters + */ +int devlink_resource_register(struct devlink *devlink, + const char *resource_name, + u64 resource_size, + u64 resource_id, + u64 parent_resource_id, + const struct devlink_resource_size_params *size_params) +{ + struct devlink_resource *resource; + struct list_head *resource_list; + bool top_hierarchy; + int err = 0; + + top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP; + + mutex_lock(&devlink->lock); + resource = devlink_resource_find(devlink, NULL, resource_id); + if (resource) { + err = -EINVAL; + goto out; + } + + resource = kzalloc(sizeof(*resource), GFP_KERNEL); + if (!resource) { + err = -ENOMEM; + goto out; + } + + if (top_hierarchy) { + resource_list = &devlink->resource_list; + } else { + struct devlink_resource *parent_resource; + + parent_resource = devlink_resource_find(devlink, NULL, + parent_resource_id); + if (parent_resource) { + resource_list = &parent_resource->resource_list; + resource->parent = parent_resource; + } else { + kfree(resource); + err = -EINVAL; + goto out; + } + } + + resource->name = resource_name; + resource->size = resource_size; + resource->size_new = resource_size; + resource->id = resource_id; + resource->size_valid = true; + memcpy(&resource->size_params, size_params, + sizeof(resource->size_params)); + INIT_LIST_HEAD(&resource->resource_list); + list_add_tail(&resource->list, resource_list); +out: + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_resource_register); + +/** + * devlink_resources_unregister - free all resources + * + * @devlink: devlink + * @resource: resource + */ +void devlink_resources_unregister(struct devlink *devlink, + struct devlink_resource *resource) +{ + struct devlink_resource *tmp, *child_resource; + struct list_head *resource_list; + + if (resource) + resource_list = &resource->resource_list; + else + resource_list = &devlink->resource_list; + + if (!resource) + mutex_lock(&devlink->lock); + + list_for_each_entry_safe(child_resource, tmp, resource_list, list) { + devlink_resources_unregister(devlink, child_resource); + list_del(&child_resource->list); + kfree(child_resource); + } + + if (!resource) + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_resources_unregister); + +/** + * devlink_resource_size_get - get and update size + * + * @devlink: devlink + * @resource_id: the requested resource id + * @p_resource_size: ptr to update + */ +int devlink_resource_size_get(struct devlink *devlink, + u64 resource_id, + u64 *p_resource_size) +{ + struct devlink_resource *resource; + int err = 0; + + mutex_lock(&devlink->lock); + resource = devlink_resource_find(devlink, NULL, resource_id); + if (!resource) { + err = -EINVAL; + goto out; + } + *p_resource_size = resource->size_new; + resource->size = resource->size_new; +out: + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_resource_size_get); + +/** + * devlink_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 devlink_dpipe_table_resource_set(struct devlink *devlink, + const char *table_name, u64 resource_id, + u64 resource_units) +{ + struct devlink_dpipe_table *table; + int err = 0; + + mutex_lock(&devlink->lock); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) { + err = -EINVAL; + goto out; + } + table->resource_id = resource_id; + table->resource_units = resource_units; + table->resource_valid = true; +out: + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set); + +/** + * devlink_resource_occ_get_register - register occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + * @occ_get: occupancy getter callback + * @occ_get_priv: occupancy getter callback priv + */ +void devlink_resource_occ_get_register(struct devlink *devlink, + u64 resource_id, + devlink_resource_occ_get_t *occ_get, + void *occ_get_priv) +{ + struct devlink_resource *resource; + + mutex_lock(&devlink->lock); + resource = devlink_resource_find(devlink, NULL, resource_id); + if (WARN_ON(!resource)) + goto out; + WARN_ON(resource->occ_get); + + resource->occ_get = occ_get; + resource->occ_get_priv = occ_get_priv; +out: + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register); + +/** + * devlink_resource_occ_get_unregister - unregister occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + */ +void devlink_resource_occ_get_unregister(struct devlink *devlink, + u64 resource_id) +{ + struct devlink_resource *resource; + + mutex_lock(&devlink->lock); + resource = devlink_resource_find(devlink, NULL, resource_id); + if (WARN_ON(!resource)) + goto out; + WARN_ON(!resource->occ_get); + + resource->occ_get = NULL; + resource->occ_get_priv = NULL; +out: + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister); + +static int devlink_param_verify(const struct devlink_param *param) +{ + if (!param || !param->name || !param->supported_cmodes) + return -EINVAL; + if (param->generic) + return devlink_param_generic_verify(param); + else + return devlink_param_driver_verify(param); +} + +static int __devlink_params_register(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, + const struct devlink_param *params, + size_t params_count, + enum devlink_command reg_cmd, + enum devlink_command unreg_cmd) +{ + const struct devlink_param *param = params; + int i; + int err; + + mutex_lock(&devlink->lock); + for (i = 0; i < params_count; i++, param++) { + err = devlink_param_verify(param); + if (err) + goto rollback; + + err = devlink_param_register_one(devlink, port_index, + param_list, param, reg_cmd); + if (err) + goto rollback; + } + + mutex_unlock(&devlink->lock); + return 0; + +rollback: + if (!i) + goto unlock; + for (param--; i > 0; i--, param--) + devlink_param_unregister_one(devlink, port_index, param_list, + param, unreg_cmd); +unlock: + mutex_unlock(&devlink->lock); + return err; +} + +static void __devlink_params_unregister(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, + const struct devlink_param *params, + size_t params_count, + enum devlink_command cmd) +{ + const struct devlink_param *param = params; + int i; + + mutex_lock(&devlink->lock); + for (i = 0; i < params_count; i++, param++) + devlink_param_unregister_one(devlink, 0, param_list, param, + cmd); + mutex_unlock(&devlink->lock); +} + +/** + * devlink_params_register - register configuration parameters + * + * @devlink: devlink + * @params: configuration parameters array + * @params_count: number of parameters provided + * + * Register the configuration parameters supported by the driver. + */ +int devlink_params_register(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + return __devlink_params_register(devlink, 0, &devlink->param_list, + params, params_count, + DEVLINK_CMD_PARAM_NEW, + DEVLINK_CMD_PARAM_DEL); +} +EXPORT_SYMBOL_GPL(devlink_params_register); + +/** + * devlink_params_unregister - unregister configuration parameters + * @devlink: devlink + * @params: configuration parameters to unregister + * @params_count: number of parameters provided + */ +void devlink_params_unregister(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + return __devlink_params_unregister(devlink, 0, &devlink->param_list, + params, params_count, + DEVLINK_CMD_PARAM_DEL); +} +EXPORT_SYMBOL_GPL(devlink_params_unregister); + +/** + * devlink_params_publish - publish configuration parameters + * + * @devlink: devlink + * + * Publish previously registered configuration parameters. + */ +void devlink_params_publish(struct devlink *devlink) +{ + struct devlink_param_item *param_item; + + list_for_each_entry(param_item, &devlink->param_list, list) { + if (param_item->published) + continue; + param_item->published = true; + devlink_param_notify(devlink, 0, param_item, + DEVLINK_CMD_PARAM_NEW); + } +} +EXPORT_SYMBOL_GPL(devlink_params_publish); + +/** + * devlink_params_unpublish - unpublish configuration parameters + * + * @devlink: devlink + * + * Unpublish previously registered configuration parameters. + */ +void devlink_params_unpublish(struct devlink *devlink) +{ + struct devlink_param_item *param_item; + + list_for_each_entry(param_item, &devlink->param_list, list) { + if (!param_item->published) + continue; + param_item->published = false; + devlink_param_notify(devlink, 0, param_item, + DEVLINK_CMD_PARAM_DEL); + } +} +EXPORT_SYMBOL_GPL(devlink_params_unpublish); + +/** + * devlink_port_params_register - register port configuration parameters + * + * @devlink_port: devlink port + * @params: configuration parameters array + * @params_count: number of parameters provided + * + * Register the configuration parameters supported by the port. + */ +int devlink_port_params_register(struct devlink_port *devlink_port, + const struct devlink_param *params, + size_t params_count) +{ + return __devlink_params_register(devlink_port->devlink, + devlink_port->index, + &devlink_port->param_list, params, + params_count, + DEVLINK_CMD_PORT_PARAM_NEW, + DEVLINK_CMD_PORT_PARAM_DEL); +} +EXPORT_SYMBOL_GPL(devlink_port_params_register); + +/** + * devlink_port_params_unregister - unregister port configuration + * parameters + * + * @devlink_port: devlink port + * @params: configuration parameters array + * @params_count: number of parameters provided + */ +void devlink_port_params_unregister(struct devlink_port *devlink_port, + const struct devlink_param *params, + size_t params_count) +{ + return __devlink_params_unregister(devlink_port->devlink, + devlink_port->index, + &devlink_port->param_list, + params, params_count, + DEVLINK_CMD_PORT_PARAM_DEL); +} +EXPORT_SYMBOL_GPL(devlink_port_params_unregister); + +static int +__devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id, + union devlink_param_value *init_val) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(param_list, param_id); + if (!param_item) + return -EINVAL; + + if (!param_item->driverinit_value_valid || + !devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT)) + return -EOPNOTSUPP; + + if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING) + strcpy(init_val->vstr, param_item->driverinit_value.vstr); + else + *init_val = param_item->driverinit_value; + + return 0; +} + +static int +__devlink_param_driverinit_value_set(struct devlink *devlink, + unsigned int port_index, + struct list_head *param_list, u32 param_id, + union devlink_param_value init_val, + enum devlink_command cmd) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(param_list, param_id); + if (!param_item) + return -EINVAL; + + if (!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT)) + return -EOPNOTSUPP; + + if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING) + strcpy(param_item->driverinit_value.vstr, init_val.vstr); + else + param_item->driverinit_value = init_val; + param_item->driverinit_value_valid = true; + + devlink_param_notify(devlink, port_index, param_item, cmd); + return 0; +} + +/** + * devlink_param_driverinit_value_get - get configuration parameter + * value for driver initializing + * + * @devlink: devlink + * @param_id: parameter ID + * @init_val: value of parameter in driverinit configuration mode + * + * This function should be used by the driver to get driverinit + * configuration for initialization after reload command. + */ +int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id, + union devlink_param_value *init_val) +{ + if (!devlink_reload_supported(devlink->ops)) + return -EOPNOTSUPP; + + return __devlink_param_driverinit_value_get(&devlink->param_list, + param_id, init_val); +} +EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get); + +/** + * devlink_param_driverinit_value_set - set value of configuration + * parameter for driverinit + * configuration mode + * + * @devlink: devlink + * @param_id: parameter ID + * @init_val: value of parameter to set for driverinit configuration mode + * + * This function should be used by the driver to set driverinit + * configuration mode default value. + */ +int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id, + union devlink_param_value init_val) +{ + return __devlink_param_driverinit_value_set(devlink, 0, + &devlink->param_list, + param_id, init_val, + DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set); + +/** + * devlink_port_param_driverinit_value_get - get configuration parameter + * value for driver initializing + * + * @devlink_port: devlink_port + * @param_id: parameter ID + * @init_val: value of parameter in driverinit configuration mode + * + * This function should be used by the driver to get driverinit + * configuration for initialization after reload command. + */ +int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port, + u32 param_id, + union devlink_param_value *init_val) +{ + struct devlink *devlink = devlink_port->devlink; + + if (!devlink_reload_supported(devlink->ops)) + return -EOPNOTSUPP; + + return __devlink_param_driverinit_value_get(&devlink_port->param_list, + param_id, init_val); +} +EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get); + +/** + * devlink_port_param_driverinit_value_set - set value of configuration + * parameter for driverinit + * configuration mode + * + * @devlink_port: devlink_port + * @param_id: parameter ID + * @init_val: value of parameter to set for driverinit configuration mode + * + * This function should be used by the driver to set driverinit + * configuration mode default value. + */ +int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port, + u32 param_id, + union devlink_param_value init_val) +{ + return __devlink_param_driverinit_value_set(devlink_port->devlink, + devlink_port->index, + &devlink_port->param_list, + param_id, init_val, + DEVLINK_CMD_PORT_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set); + +/** + * devlink_param_value_changed - notify devlink on a parameter's value + * change. Should be called by the driver + * right after the change. + * + * @devlink: devlink + * @param_id: parameter ID + * + * This function should be used by the driver to notify devlink on value + * change, excluding driverinit configuration mode. + * For driverinit configuration mode driver should use the function + */ +void devlink_param_value_changed(struct devlink *devlink, u32 param_id) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink->param_list, param_id); + WARN_ON(!param_item); + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devlink_param_value_changed); + +/** + * devlink_port_param_value_changed - notify devlink on a parameter's value + * change. Should be called by the driver + * right after the change. + * + * @devlink_port: devlink_port + * @param_id: parameter ID + * + * This function should be used by the driver to notify devlink on value + * change, excluding driverinit configuration mode. + * For driverinit configuration mode driver should use the function + * devlink_port_param_driverinit_value_set() instead. + */ +void devlink_port_param_value_changed(struct devlink_port *devlink_port, + u32 param_id) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink_port->param_list, + param_id); + WARN_ON(!param_item); + + devlink_param_notify(devlink_port->devlink, devlink_port->index, + param_item, DEVLINK_CMD_PORT_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devlink_port_param_value_changed); + +/** + * devlink_param_value_str_fill - Safely fill-up the string preventing + * from overflow of the preallocated buffer + * + * @dst_val: destination devlink_param_value + * @src: source buffer + */ +void devlink_param_value_str_fill(union devlink_param_value *dst_val, + const char *src) +{ + size_t len; + + len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE); + WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE); +} +EXPORT_SYMBOL_GPL(devlink_param_value_str_fill); + +/** + * devlink_region_create - create a new address region + * + * @devlink: devlink + * @ops: region operations and name + * @region_max_snapshots: Maximum supported number of snapshots for region + * @region_size: size of region + */ +struct devlink_region * +devlink_region_create(struct devlink *devlink, + const struct devlink_region_ops *ops, + u32 region_max_snapshots, u64 region_size) +{ + struct devlink_region *region; + int err = 0; + + if (WARN_ON(!ops) || WARN_ON(!ops->destructor)) + return ERR_PTR(-EINVAL); + + mutex_lock(&devlink->lock); + + if (devlink_region_get_by_name(devlink, ops->name)) { + err = -EEXIST; + goto unlock; + } + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) { + err = -ENOMEM; + goto unlock; + } + + region->devlink = devlink; + region->max_snapshots = region_max_snapshots; + region->ops = ops; + region->size = region_size; + INIT_LIST_HEAD(®ion->snapshot_list); + list_add_tail(®ion->list, &devlink->region_list); + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW); + + mutex_unlock(&devlink->lock); + return region; + +unlock: + mutex_unlock(&devlink->lock); + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(devlink_region_create); + +/** + * devlink_port_region_create - create a new address region for a port + * + * @port: devlink port + * @ops: region operations and name + * @region_max_snapshots: Maximum supported number of snapshots for region + * @region_size: size of region + */ +struct devlink_region * +devlink_port_region_create(struct devlink_port *port, + const struct devlink_port_region_ops *ops, + u32 region_max_snapshots, u64 region_size) +{ + struct devlink *devlink = port->devlink; + struct devlink_region *region; + int err = 0; + + if (WARN_ON(!ops) || WARN_ON(!ops->destructor)) + return ERR_PTR(-EINVAL); + + mutex_lock(&devlink->lock); + + if (devlink_port_region_get_by_name(port, ops->name)) { + err = -EEXIST; + goto unlock; + } + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) { + err = -ENOMEM; + goto unlock; + } + + region->devlink = devlink; + region->port = port; + region->max_snapshots = region_max_snapshots; + region->port_ops = ops; + region->size = region_size; + INIT_LIST_HEAD(®ion->snapshot_list); + list_add_tail(®ion->list, &port->region_list); + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW); + + mutex_unlock(&devlink->lock); + return region; + +unlock: + mutex_unlock(&devlink->lock); + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(devlink_port_region_create); + +/** + * devlink_region_destroy - destroy address region + * + * @region: devlink region to destroy + */ +void devlink_region_destroy(struct devlink_region *region) +{ + struct devlink *devlink = region->devlink; + struct devlink_snapshot *snapshot, *ts; + + mutex_lock(&devlink->lock); + + /* Free all snapshots of region */ + list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list) + devlink_region_snapshot_del(region, snapshot); + + list_del(®ion->list); + + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL); + mutex_unlock(&devlink->lock); + kfree(region); +} +EXPORT_SYMBOL_GPL(devlink_region_destroy); + +/** + * devlink_region_snapshot_id_get - get snapshot ID + * + * This callback should be called when adding a new snapshot, + * Driver should use the same id for multiple snapshots taken + * on multiple regions at the same time/by the same trigger. + * + * The caller of this function must use devlink_region_snapshot_id_put + * when finished creating regions using this id. + * + * Returns zero on success, or a negative error code on failure. + * + * @devlink: devlink + * @id: storage to return id + */ +int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id) +{ + int err; + + mutex_lock(&devlink->lock); + err = __devlink_region_snapshot_id_get(devlink, id); + mutex_unlock(&devlink->lock); + + return err; +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get); + +/** + * devlink_region_snapshot_id_put - put snapshot ID reference + * + * This should be called by a driver after finishing creating snapshots + * with an id. Doing so ensures that the ID can later be released in the + * event that all snapshots using it have been destroyed. + * + * @devlink: devlink + * @id: id to release reference on + */ +void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id) +{ + mutex_lock(&devlink->lock); + __devlink_snapshot_id_decrement(devlink, id); + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put); + +/** + * devlink_region_snapshot_create - create a new snapshot + * This will add a new snapshot of a region. The snapshot + * will be stored on the region struct and can be accessed + * from devlink. This is useful for future analyses of snapshots. + * Multiple snapshots can be created on a region. + * The @snapshot_id should be obtained using the getter function. + * + * @region: devlink region of the snapshot + * @data: snapshot data + * @snapshot_id: snapshot id to be created + */ +int devlink_region_snapshot_create(struct devlink_region *region, + u8 *data, u32 snapshot_id) +{ + struct devlink *devlink = region->devlink; + int err; + + mutex_lock(&devlink->lock); + err = __devlink_region_snapshot_create(region, data, snapshot_id); + mutex_unlock(&devlink->lock); + + return err; +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_create); + +#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), +}; + +#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), +}; + +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); + + 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); +} + +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); + + 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); +} + +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; +} + +/** + * devlink_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 devlink_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; + + mutex_lock(&devlink->lock); + 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; + } + mutex_unlock(&devlink->lock); + + return 0; + +err_trap_register: +err_trap_verify: + for (i--; i >= 0; i--) + devlink_trap_unregister(devlink, &traps[i]); + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_traps_register); + +/** + * devlink_traps_unregister - Unregister packet traps from devlink. + * @devlink: devlink. + * @traps: Packet traps. + * @traps_count: Count of provided packet traps. + */ +void devlink_traps_unregister(struct devlink *devlink, + const struct devlink_trap *traps, + size_t traps_count) +{ + int i; + + mutex_lock(&devlink->lock); + /* 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]); + mutex_unlock(&devlink->lock); +} +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); + stats->rx_bytes += skb_len; + 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_dev; + 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 (trace_devlink_trap_report_enabled()) { + 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); +} + +/** + * devlink_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 devlink_trap_groups_register(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + int i, err; + + mutex_lock(&devlink->lock); + 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; + } + mutex_unlock(&devlink->lock); + + return 0; + +err_trap_group_register: +err_trap_group_verify: + for (i--; i >= 0; i--) + devlink_trap_group_unregister(devlink, &groups[i]); + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_trap_groups_register); + +/** + * devlink_trap_groups_unregister - Unregister packet trap groups from devlink. + * @devlink: devlink. + * @groups: Packet trap groups. + * @groups_count: Count of provided packet trap groups. + */ +void devlink_trap_groups_unregister(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + int i; + + mutex_lock(&devlink->lock); + for (i = groups_count - 1; i >= 0; i--) + devlink_trap_group_unregister(devlink, &groups[i]); + mutex_unlock(&devlink->lock); +} +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); + + 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); +} + +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); +} + +/** + * devlink_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 +devlink_trap_policers_register(struct devlink *devlink, + const struct devlink_trap_policer *policers, + size_t policers_count) +{ + int i, err; + + mutex_lock(&devlink->lock); + 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; + } + mutex_unlock(&devlink->lock); + + return 0; + +err_trap_policer_register: +err_trap_policer_verify: + for (i--; i >= 0; i--) + devlink_trap_policer_unregister(devlink, &policers[i]); + mutex_unlock(&devlink->lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_trap_policers_register); + +/** + * devlink_trap_policers_unregister - Unregister packet trap policers from devlink. + * @devlink: devlink. + * @policers: Packet trap policers. + * @policers_count: Count of provided packet trap policers. + */ +void +devlink_trap_policers_unregister(struct devlink *devlink, + const struct devlink_trap_policer *policers, + size_t policers_count) +{ + int i; + + mutex_lock(&devlink->lock); + for (i = policers_count - 1; i >= 0; i--) + devlink_trap_policer_unregister(devlink, &policers[i]); + mutex_unlock(&devlink->lock); +} +EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister); + +static void __devlink_compat_running_version(struct devlink *devlink, + char *buf, size_t len) +{ + const struct nlattr *nlattr; + struct devlink_info_req req; + struct sk_buff *msg; + int rem, err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + req.msg = msg; + err = devlink->ops->info_get(devlink, &req, NULL); + if (err) + goto free_msg; + + nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) { + const struct nlattr *kv; + int rem_kv; + + if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING) + continue; + + nla_for_each_nested(kv, nlattr, rem_kv) { + if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE) + continue; + + strlcat(buf, nla_data(kv), len); + strlcat(buf, " ", len); + } + } +free_msg: + nlmsg_free(msg); +} + +void devlink_compat_running_version(struct net_device *dev, + char *buf, size_t len) +{ + struct devlink *devlink; + + dev_hold(dev); + rtnl_unlock(); + + devlink = netdev_to_devlink(dev); + if (!devlink || !devlink->ops->info_get) + goto out; + + mutex_lock(&devlink->lock); + __devlink_compat_running_version(devlink, buf, len); + mutex_unlock(&devlink->lock); + +out: + rtnl_lock(); + dev_put(dev); +} + +int devlink_compat_flash_update(struct net_device *dev, const char *file_name) +{ + struct devlink_flash_update_params params = {}; + struct devlink *devlink; + int ret; + + dev_hold(dev); + rtnl_unlock(); + + devlink = netdev_to_devlink(dev); + if (!devlink || !devlink->ops->flash_update) { + ret = -EOPNOTSUPP; + goto out; + } + + params.file_name = file_name; + + mutex_lock(&devlink->lock); + ret = devlink->ops->flash_update(devlink, ¶ms, NULL); + mutex_unlock(&devlink->lock); + +out: + rtnl_lock(); + dev_put(dev); + + return ret; +} + +int devlink_compat_phys_port_name_get(struct net_device *dev, + char *name, size_t len) +{ + struct devlink_port *devlink_port; + + /* RTNL mutex is held here which ensures that devlink_port + * instance cannot disappear in the middle. No need to take + * any devlink lock as only permanent values are accessed. + */ + ASSERT_RTNL(); + + devlink_port = netdev_to_devlink_port(dev); + if (!devlink_port) + return -EOPNOTSUPP; + + return __devlink_port_phys_port_name_get(devlink_port, name, len); +} + +int devlink_compat_switch_id_get(struct net_device *dev, + struct netdev_phys_item_id *ppid) +{ + struct devlink_port *devlink_port; + + /* Caller must hold RTNL mutex or reference to dev, which ensures that + * devlink_port instance cannot disappear in the middle. No need to take + * any devlink lock as only permanent values are accessed. + */ + devlink_port = netdev_to_devlink_port(dev); + if (!devlink_port || !devlink_port->switch_port) + return -EOPNOTSUPP; + + memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); + + return 0; +} + +static void __net_exit devlink_pernet_pre_exit(struct net *net) +{ + struct devlink *devlink; + u32 actions_performed; + int err; + + /* In case network namespace is getting destroyed, reload + * all devlink instances from this namespace into init_net. + */ + mutex_lock(&devlink_mutex); + list_for_each_entry(devlink, &devlink_list, list) { + if (net_eq(devlink_net(devlink), net)) { + if (WARN_ON(!devlink_reload_supported(devlink->ops))) + continue; + err = devlink_reload(devlink, &init_net, + DEVLINK_RELOAD_ACTION_DRIVER_REINIT, + DEVLINK_RELOAD_LIMIT_UNSPEC, + &actions_performed, NULL); + if (err && err != -EOPNOTSUPP) + pr_warn("Failed to reload devlink instance into init_net\n"); + } + } + mutex_unlock(&devlink_mutex); +} + +static struct pernet_operations devlink_pernet_ops __net_initdata = { + .pre_exit = devlink_pernet_pre_exit, +}; + +static int __init devlink_init(void) +{ + int err; + + err = genl_register_family(&devlink_nl_family); + if (err) + goto out; + err = register_pernet_subsys(&devlink_pernet_ops); + +out: + WARN_ON(err); + return err; +} + +subsys_initcall(devlink_init); |