/* * Copyright (c) 2018 Cumulus Networks. All rights reserved. * Copyright (c) 2018 David Ahern * Copyright (c) 2019 Mellanox Technologies. All rights reserved. * * This software is licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this * source tree. * * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netdevsim.h" static struct dentry *nsim_dev_ddir; #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) static ssize_t nsim_dev_take_snapshot_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) { struct nsim_dev *nsim_dev = file->private_data; void *dummy_data; int err; u32 id; dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL); if (!dummy_data) return -ENOMEM; get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); id = devlink_region_shapshot_id_get(priv_to_devlink(nsim_dev)); err = devlink_region_snapshot_create(nsim_dev->dummy_region, dummy_data, id, kfree); if (err) { pr_err("Failed to create region snapshot\n"); kfree(dummy_data); return err; } return count; } static const struct file_operations nsim_dev_take_snapshot_fops = { .open = simple_open, .write = nsim_dev_take_snapshot_write, .llseek = generic_file_llseek, }; static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) { char dev_ddir_name[sizeof(DRV_NAME) + 10]; sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); if (IS_ERR_OR_NULL(nsim_dev->ddir)) return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL; nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); if (IS_ERR_OR_NULL(nsim_dev->ports_ddir)) return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL; debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, &nsim_dev->fw_update_status); debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, &nsim_dev->max_macs); debugfs_create_bool("test1", 0600, nsim_dev->ddir, &nsim_dev->test1); debugfs_create_file("take_snapshot", 0200, nsim_dev->ddir, nsim_dev, &nsim_dev_take_snapshot_fops); return 0; } static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) { debugfs_remove_recursive(nsim_dev->ports_ddir); debugfs_remove_recursive(nsim_dev->ddir); } static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port) { char port_ddir_name[16]; char dev_link_name[32]; sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, nsim_dev->ports_ddir); if (IS_ERR_OR_NULL(nsim_dev_port->ddir)) return -ENOMEM; sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); return 0; } static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) { debugfs_remove_recursive(nsim_dev_port->ddir); } static struct net *nsim_devlink_net(struct devlink *devlink) { return &init_net; } static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv) { struct net *net = priv; return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, false); } static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv) { struct net *net = priv; return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, false); } static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv) { struct net *net = priv; return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, false); } static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv) { struct net *net = priv; return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, false); } static int nsim_dev_resources_register(struct devlink *devlink) { struct devlink_resource_size_params params = { .size_max = (u64)-1, .size_granularity = 1, .unit = DEVLINK_RESOURCE_UNIT_ENTRY }; struct net *net = nsim_devlink_net(devlink); int err; u64 n; /* Resources for IPv4 */ err = devlink_resource_register(devlink, "IPv4", (u64)-1, NSIM_RESOURCE_IPV4, DEVLINK_RESOURCE_ID_PARENT_TOP, ¶ms); if (err) { pr_err("Failed to register IPv4 top resource\n"); goto out; } n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, true); err = devlink_resource_register(devlink, "fib", n, NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4, ¶ms); if (err) { pr_err("Failed to register IPv4 FIB resource\n"); return err; } n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, true); err = devlink_resource_register(devlink, "fib-rules", n, NSIM_RESOURCE_IPV4_FIB_RULES, NSIM_RESOURCE_IPV4, ¶ms); if (err) { pr_err("Failed to register IPv4 FIB rules resource\n"); return err; } /* Resources for IPv6 */ err = devlink_resource_register(devlink, "IPv6", (u64)-1, NSIM_RESOURCE_IPV6, DEVLINK_RESOURCE_ID_PARENT_TOP, ¶ms); if (err) { pr_err("Failed to register IPv6 top resource\n"); goto out; } n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, true); err = devlink_resource_register(devlink, "fib", n, NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6, ¶ms); if (err) { pr_err("Failed to register IPv6 FIB resource\n"); return err; } n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, true); err = devlink_resource_register(devlink, "fib-rules", n, NSIM_RESOURCE_IPV6_FIB_RULES, NSIM_RESOURCE_IPV6, ¶ms); if (err) { pr_err("Failed to register IPv6 FIB rules resource\n"); return err; } devlink_resource_occ_get_register(devlink, NSIM_RESOURCE_IPV4_FIB, nsim_dev_ipv4_fib_resource_occ_get, net); devlink_resource_occ_get_register(devlink, NSIM_RESOURCE_IPV4_FIB_RULES, nsim_dev_ipv4_fib_rules_res_occ_get, net); devlink_resource_occ_get_register(devlink, NSIM_RESOURCE_IPV6_FIB, nsim_dev_ipv6_fib_resource_occ_get, net); devlink_resource_occ_get_register(devlink, NSIM_RESOURCE_IPV6_FIB_RULES, nsim_dev_ipv6_fib_rules_res_occ_get, net); out: return err; } enum nsim_devlink_param_id { NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, NSIM_DEVLINK_PARAM_ID_TEST1, }; static const struct devlink_param nsim_devlink_params[] = { DEVLINK_PARAM_GENERIC(MAX_MACS, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), NULL, NULL, NULL), DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, "test1", DEVLINK_PARAM_TYPE_BOOL, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), NULL, NULL, NULL), }; static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, struct devlink *devlink) { union devlink_param_value value; value.vu32 = nsim_dev->max_macs; devlink_param_driverinit_value_set(devlink, DEVLINK_PARAM_GENERIC_ID_MAX_MACS, value); value.vbool = nsim_dev->test1; devlink_param_driverinit_value_set(devlink, NSIM_DEVLINK_PARAM_ID_TEST1, value); } static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) { struct nsim_dev *nsim_dev = devlink_priv(devlink); union devlink_param_value saved_value; int err; err = devlink_param_driverinit_value_get(devlink, DEVLINK_PARAM_GENERIC_ID_MAX_MACS, &saved_value); if (!err) nsim_dev->max_macs = saved_value.vu32; err = devlink_param_driverinit_value_get(devlink, NSIM_DEVLINK_PARAM_ID_TEST1, &saved_value); if (!err) nsim_dev->test1 = saved_value.vbool; } #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, struct devlink *devlink) { nsim_dev->dummy_region = devlink_region_create(devlink, "dummy", NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, NSIM_DEV_DUMMY_REGION_SIZE); return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); } static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) { devlink_region_destroy(nsim_dev->dummy_region); } struct nsim_trap_item { void *trap_ctx; enum devlink_trap_action action; }; struct nsim_trap_data { struct delayed_work trap_report_dw; struct nsim_trap_item *trap_items_arr; struct nsim_dev *nsim_dev; spinlock_t trap_lock; /* Protects trap_items_arr */ }; /* All driver-specific traps must be documented in * Documentation/networking/devlink-trap-netdevsim.rst */ enum { NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, NSIM_TRAP_ID_FID_MISS, }; #define NSIM_TRAP_NAME_FID_MISS "fid_miss" #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT #define NSIM_TRAP_DROP(_id, _group_id) \ DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ NSIM_TRAP_METADATA) #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ NSIM_TRAP_METADATA) #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ NSIM_TRAP_NAME_##_id, \ DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ NSIM_TRAP_METADATA) static const struct devlink_trap nsim_traps_arr[] = { NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS), NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), }; #define NSIM_TRAP_L4_DATA_LEN 100 static struct sk_buff *nsim_dev_trap_skb_build(void) { int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; struct sk_buff *skb; struct udphdr *udph; struct ethhdr *eth; struct iphdr *iph; skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb) return NULL; tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; skb_reset_mac_header(skb); eth = skb_put(skb, sizeof(struct ethhdr)); eth_random_addr(eth->h_dest); eth_random_addr(eth->h_source); eth->h_proto = htons(ETH_P_IP); skb->protocol = htons(ETH_P_IP); skb_set_network_header(skb, skb->len); iph = skb_put(skb, sizeof(struct iphdr)); iph->protocol = IPPROTO_UDP; iph->saddr = in_aton("192.0.2.1"); iph->daddr = in_aton("198.51.100.1"); iph->version = 0x4; iph->frag_off = 0; iph->ihl = 0x5; iph->tot_len = htons(tot_len); iph->ttl = 100; iph->check = 0; iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); skb_set_transport_header(skb, skb->len); udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); get_random_bytes(&udph->source, sizeof(u16)); get_random_bytes(&udph->dest, sizeof(u16)); udph->len = htons(sizeof(struct udphdr) + data_len); return skb; } static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) { struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; struct devlink *devlink = priv_to_devlink(nsim_dev); struct nsim_trap_data *nsim_trap_data; int i; nsim_trap_data = nsim_dev->trap_data; spin_lock(&nsim_trap_data->trap_lock); for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { struct nsim_trap_item *nsim_trap_item; struct sk_buff *skb; nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) continue; skb = nsim_dev_trap_skb_build(); if (!skb) continue; skb->dev = nsim_dev_port->ns->netdev; /* Trapped packets are usually passed to devlink in softIRQ, * but in this case they are generated in a workqueue. Disable * softIRQs to prevent lockdep from complaining about * "incosistent lock state". */ local_bh_disable(); devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, &nsim_dev_port->devlink_port); local_bh_enable(); consume_skb(skb); } spin_unlock(&nsim_trap_data->trap_lock); } #define NSIM_TRAP_REPORT_INTERVAL_MS 100 static void nsim_dev_trap_report_work(struct work_struct *work) { struct nsim_trap_data *nsim_trap_data; struct nsim_dev_port *nsim_dev_port; struct nsim_dev *nsim_dev; nsim_trap_data = container_of(work, struct nsim_trap_data, trap_report_dw.work); nsim_dev = nsim_trap_data->nsim_dev; /* For each running port and enabled packet trap, generate a UDP * packet with a random 5-tuple and report it. */ mutex_lock(&nsim_dev->port_list_lock); list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { if (!netif_running(nsim_dev_port->ns->netdev)) continue; nsim_dev_trap_report(nsim_dev_port); } mutex_unlock(&nsim_dev->port_list_lock); schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); } static int nsim_dev_traps_init(struct devlink *devlink) { struct nsim_dev *nsim_dev = devlink_priv(devlink); struct nsim_trap_data *nsim_trap_data; int err; nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); if (!nsim_trap_data) return -ENOMEM; nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), sizeof(struct nsim_trap_item), GFP_KERNEL); if (!nsim_trap_data->trap_items_arr) { err = -ENOMEM; goto err_trap_data_free; } /* The lock is used to protect the action state of the registered * traps. The value is written by user and read in delayed work when * iterating over all the traps. */ spin_lock_init(&nsim_trap_data->trap_lock); nsim_trap_data->nsim_dev = nsim_dev; nsim_dev->trap_data = nsim_trap_data; err = devlink_traps_register(devlink, nsim_traps_arr, ARRAY_SIZE(nsim_traps_arr), NULL); if (err) goto err_trap_items_free; INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, nsim_dev_trap_report_work); schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); return 0; err_trap_items_free: kfree(nsim_trap_data->trap_items_arr); err_trap_data_free: kfree(nsim_trap_data); return err; } static void nsim_dev_traps_exit(struct devlink *devlink) { struct nsim_dev *nsim_dev = devlink_priv(devlink); cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); devlink_traps_unregister(devlink, nsim_traps_arr, ARRAY_SIZE(nsim_traps_arr)); kfree(nsim_dev->trap_data->trap_items_arr); kfree(nsim_dev->trap_data); } static int nsim_dev_reload_down(struct devlink *devlink, struct netlink_ext_ack *extack) { return 0; } static int nsim_dev_reload_up(struct devlink *devlink, struct netlink_ext_ack *extack) { enum nsim_resource_id res_ids[] = { NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES, NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES }; struct net *net = nsim_devlink_net(devlink); int i; for (i = 0; i < ARRAY_SIZE(res_ids); ++i) { int err; u64 val; err = devlink_resource_size_get(devlink, res_ids[i], &val); if (!err) { err = nsim_fib_set_max(net, res_ids[i], val, extack); if (err) return err; } } nsim_devlink_param_load_driverinit_values(devlink); return 0; } #define NSIM_DEV_FLASH_SIZE 500000 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name, const char *component, struct netlink_ext_ack *extack) { struct nsim_dev *nsim_dev = devlink_priv(devlink); int i; if (nsim_dev->fw_update_status) { devlink_flash_update_begin_notify(devlink); devlink_flash_update_status_notify(devlink, "Preparing to flash", component, 0, 0); } for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { if (nsim_dev->fw_update_status) devlink_flash_update_status_notify(devlink, "Flashing", component, i * NSIM_DEV_FLASH_CHUNK_SIZE, NSIM_DEV_FLASH_SIZE); msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); } if (nsim_dev->fw_update_status) { devlink_flash_update_status_notify(devlink, "Flashing", component, NSIM_DEV_FLASH_SIZE, NSIM_DEV_FLASH_SIZE); devlink_flash_update_status_notify(devlink, "Flashing done", component, 0, 0); devlink_flash_update_end_notify(devlink); } return 0; } static struct nsim_trap_item * nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) { struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; int i; for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { if (nsim_traps_arr[i].id == trap_id) return &nsim_trap_data->trap_items_arr[i]; } return NULL; } static int nsim_dev_devlink_trap_init(struct devlink *devlink, const struct devlink_trap *trap, void *trap_ctx) { struct nsim_dev *nsim_dev = devlink_priv(devlink); struct nsim_trap_item *nsim_trap_item; nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); if (WARN_ON(!nsim_trap_item)) return -ENOENT; nsim_trap_item->trap_ctx = trap_ctx; nsim_trap_item->action = trap->init_action; return 0; } static int nsim_dev_devlink_trap_action_set(struct devlink *devlink, const struct devlink_trap *trap, enum devlink_trap_action action) { struct nsim_dev *nsim_dev = devlink_priv(devlink); struct nsim_trap_item *nsim_trap_item; nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); if (WARN_ON(!nsim_trap_item)) return -ENOENT; spin_lock(&nsim_dev->trap_data->trap_lock); nsim_trap_item->action = action; spin_unlock(&nsim_dev->trap_data->trap_lock); return 0; } static const struct devlink_ops nsim_dev_devlink_ops = { .reload_down = nsim_dev_reload_down, .reload_up = nsim_dev_reload_up, .flash_update = nsim_dev_flash_update, .trap_init = nsim_dev_devlink_trap_init, .trap_action_set = nsim_dev_devlink_trap_action_set, }; #define NSIM_DEV_MAX_MACS_DEFAULT 32 #define NSIM_DEV_TEST1_DEFAULT true static struct nsim_dev * nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count) { struct nsim_dev *nsim_dev; struct devlink *devlink; int err; devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); if (!devlink) return ERR_PTR(-ENOMEM); nsim_dev = devlink_priv(devlink); nsim_dev->nsim_bus_dev = nsim_bus_dev; nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); INIT_LIST_HEAD(&nsim_dev->port_list); mutex_init(&nsim_dev->port_list_lock); nsim_dev->fw_update_status = true; nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; err = nsim_dev_resources_register(devlink); if (err) goto err_devlink_free; err = devlink_register(devlink, &nsim_bus_dev->dev); if (err) goto err_resources_unregister; err = devlink_params_register(devlink, nsim_devlink_params, ARRAY_SIZE(nsim_devlink_params)); if (err) goto err_dl_unregister; nsim_devlink_set_params_init_values(nsim_dev, devlink); err = nsim_dev_dummy_region_init(nsim_dev, devlink); if (err) goto err_params_unregister; err = nsim_dev_traps_init(devlink); if (err) goto err_dummy_region_exit; err = nsim_dev_debugfs_init(nsim_dev); if (err) goto err_traps_exit; err = nsim_bpf_dev_init(nsim_dev); if (err) goto err_debugfs_exit; devlink_params_publish(devlink); devlink_reload_enable(devlink); return nsim_dev; err_debugfs_exit: nsim_dev_debugfs_exit(nsim_dev); err_traps_exit: nsim_dev_traps_exit(devlink); err_dummy_region_exit: nsim_dev_dummy_region_exit(nsim_dev); err_params_unregister: devlink_params_unregister(devlink, nsim_devlink_params, ARRAY_SIZE(nsim_devlink_params)); err_dl_unregister: devlink_unregister(devlink); err_resources_unregister: devlink_resources_unregister(devlink, NULL); err_devlink_free: devlink_free(devlink); return ERR_PTR(err); } static void nsim_dev_destroy(struct nsim_dev *nsim_dev) { struct devlink *devlink = priv_to_devlink(nsim_dev); devlink_reload_disable(devlink); nsim_bpf_dev_exit(nsim_dev); nsim_dev_debugfs_exit(nsim_dev); nsim_dev_traps_exit(devlink); nsim_dev_dummy_region_exit(nsim_dev); devlink_params_unregister(devlink, nsim_devlink_params, ARRAY_SIZE(nsim_devlink_params)); devlink_unregister(devlink); devlink_resources_unregister(devlink, NULL); mutex_destroy(&nsim_dev->port_list_lock); devlink_free(devlink); } static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, unsigned int port_index) { struct nsim_dev_port *nsim_dev_port; struct devlink_port *devlink_port; int err; nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); if (!nsim_dev_port) return -ENOMEM; nsim_dev_port->port_index = port_index; devlink_port = &nsim_dev_port->devlink_port; devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, port_index + 1, 0, 0, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, port_index); if (err) goto err_port_free; err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); if (err) goto err_dl_port_unregister; nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); if (IS_ERR(nsim_dev_port->ns)) { err = PTR_ERR(nsim_dev_port->ns); goto err_port_debugfs_exit; } devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); list_add(&nsim_dev_port->list, &nsim_dev->port_list); return 0; err_port_debugfs_exit: nsim_dev_port_debugfs_exit(nsim_dev_port); err_dl_port_unregister: devlink_port_unregister(devlink_port); err_port_free: kfree(nsim_dev_port); return err; } static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) { struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; list_del(&nsim_dev_port->list); devlink_port_type_clear(devlink_port); nsim_destroy(nsim_dev_port->ns); nsim_dev_port_debugfs_exit(nsim_dev_port); devlink_port_unregister(devlink_port); kfree(nsim_dev_port); } static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) { struct nsim_dev_port *nsim_dev_port, *tmp; mutex_lock(&nsim_dev->port_list_lock); list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) __nsim_dev_port_del(nsim_dev_port); mutex_unlock(&nsim_dev->port_list_lock); } int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) { struct nsim_dev *nsim_dev; int i; int err; nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count); if (IS_ERR(nsim_dev)) return PTR_ERR(nsim_dev); dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); mutex_lock(&nsim_dev->port_list_lock); for (i = 0; i < nsim_bus_dev->port_count; i++) { err = __nsim_dev_port_add(nsim_dev, i); if (err) goto err_port_del_all; } mutex_unlock(&nsim_dev->port_list_lock); return 0; err_port_del_all: mutex_unlock(&nsim_dev->port_list_lock); nsim_dev_port_del_all(nsim_dev); nsim_dev_destroy(nsim_dev); return err; } void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) { struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); nsim_dev_port_del_all(nsim_dev); nsim_dev_destroy(nsim_dev); } static struct nsim_dev_port * __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) { struct nsim_dev_port *nsim_dev_port; list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) if (nsim_dev_port->port_index == port_index) return nsim_dev_port; return NULL; } int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_index) { struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); int err; mutex_lock(&nsim_dev->port_list_lock); if (__nsim_dev_port_lookup(nsim_dev, port_index)) err = -EEXIST; else err = __nsim_dev_port_add(nsim_dev, port_index); mutex_unlock(&nsim_dev->port_list_lock); return err; } int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_index) { struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); struct nsim_dev_port *nsim_dev_port; int err = 0; mutex_lock(&nsim_dev->port_list_lock); nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); if (!nsim_dev_port) err = -ENOENT; else __nsim_dev_port_del(nsim_dev_port); mutex_unlock(&nsim_dev->port_list_lock); return err; } int nsim_dev_init(void) { nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); if (IS_ERR_OR_NULL(nsim_dev_ddir)) return -ENOMEM; return 0; } void nsim_dev_exit(void) { debugfs_remove_recursive(nsim_dev_ddir); }