// 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CREATE_TRACE_POINTS #include 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);