diff options
Diffstat (limited to 'drivers/net/netdevsim/dev.c')
| -rw-r--r-- | drivers/net/netdevsim/dev.c | 779 |
1 files changed, 634 insertions, 145 deletions
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index b509b941d5ca..059711edfc61 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -17,16 +17,60 @@ #include <linux/debugfs.h> #include <linux/device.h> +#include <linux/etherdevice.h> +#include <linux/inet.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> #include <linux/list.h> #include <linux/mutex.h> #include <linux/random.h> #include <linux/rtnetlink.h> +#include <linux/workqueue.h> #include <net/devlink.h> +#include <net/ip.h> +#include <uapi/linux/devlink.h> +#include <uapi/linux/ip.h> +#include <uapi/linux/udp.h> #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[16]; @@ -38,6 +82,18 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 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); + debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, + &nsim_dev->dont_allow_reload); + debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, + &nsim_dev->fail_reload); return 0; } @@ -71,48 +127,14 @@ static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) debugfs_remove_recursive(nsim_dev_port->ddir); } -static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv) -{ - struct nsim_dev *nsim_dev = priv; - - return nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV4_FIB, false); -} - -static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv) -{ - struct nsim_dev *nsim_dev = priv; - - return nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV4_FIB_RULES, false); -} - -static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv) -{ - struct nsim_dev *nsim_dev = priv; - - return nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV6_FIB, false); -} - -static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv) -{ - struct nsim_dev *nsim_dev = priv; - - return nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV6_FIB_RULES, false); -} - static int nsim_dev_resources_register(struct devlink *devlink) { - struct nsim_dev *nsim_dev = devlink_priv(devlink); struct devlink_resource_size_params params = { .size_max = (u64)-1, .size_granularity = 1, .unit = DEVLINK_RESOURCE_UNIT_ENTRY }; int err; - u64 n; /* Resources for IPv4 */ err = devlink_resource_register(devlink, "IPv4", (u64)-1, @@ -124,9 +146,7 @@ static int nsim_dev_resources_register(struct devlink *devlink) goto out; } - n = nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV4_FIB, true); - err = devlink_resource_register(devlink, "fib", n, + err = devlink_resource_register(devlink, "fib", (u64)-1, NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4, ¶ms); if (err) { @@ -134,9 +154,7 @@ static int nsim_dev_resources_register(struct devlink *devlink) return err; } - n = nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV4_FIB_RULES, true); - err = devlink_resource_register(devlink, "fib-rules", n, + err = devlink_resource_register(devlink, "fib-rules", (u64)-1, NSIM_RESOURCE_IPV4_FIB_RULES, NSIM_RESOURCE_IPV4, ¶ms); if (err) { @@ -154,9 +172,7 @@ static int nsim_dev_resources_register(struct devlink *devlink) goto out; } - n = nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV6_FIB, true); - err = devlink_resource_register(devlink, "fib", n, + err = devlink_resource_register(devlink, "fib", (u64)-1, NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6, ¶ms); if (err) { @@ -164,9 +180,7 @@ static int nsim_dev_resources_register(struct devlink *devlink) return err; } - n = nsim_fib_get_val(nsim_dev->fib_data, - NSIM_RESOURCE_IPV6_FIB_RULES, true); - err = devlink_resource_register(devlink, "fib-rules", n, + err = devlink_resource_register(devlink, "fib-rules", (u64)-1, NSIM_RESOURCE_IPV6_FIB_RULES, NSIM_RESOURCE_IPV6, ¶ms); if (err) { @@ -174,123 +188,437 @@ static int nsim_dev_resources_register(struct devlink *devlink) return err; } - devlink_resource_occ_get_register(devlink, - NSIM_RESOURCE_IPV4_FIB, - nsim_dev_ipv4_fib_resource_occ_get, - nsim_dev); - devlink_resource_occ_get_register(devlink, - NSIM_RESOURCE_IPV4_FIB_RULES, - nsim_dev_ipv4_fib_rules_res_occ_get, - nsim_dev); - devlink_resource_occ_get_register(devlink, - NSIM_RESOURCE_IPV6_FIB, - nsim_dev_ipv6_fib_resource_occ_get, - nsim_dev); - devlink_resource_occ_get_register(devlink, - NSIM_RESOURCE_IPV6_FIB_RULES, - nsim_dev_ipv6_fib_rules_res_occ_get, - nsim_dev); out: return err; } -static int nsim_dev_reload(struct devlink *devlink, - struct netlink_ext_ack *extack) +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); - enum nsim_resource_id res_ids[] = { - NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES, - NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES - }; - int i; + union devlink_param_value saved_value; + int err; - 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(nsim_dev->fib_data, - res_ids[i], val, extack); - if (err) - return 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; +} - return 0; +#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 const struct devlink_ops nsim_dev_devlink_ops = { - .reload = nsim_dev_reload, +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, }; -static struct nsim_dev * -nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count) +#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; - struct devlink *devlink; + + 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; - 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_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); + if (!nsim_trap_data) + return -ENOMEM; - nsim_dev->fib_data = nsim_fib_create(); - if (IS_ERR(nsim_dev->fib_data)) { - err = PTR_ERR(nsim_dev->fib_data); - goto err_devlink_free; + 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; } - err = nsim_dev_resources_register(devlink); - if (err) - goto err_fib_destroy; + /* 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_register(devlink, &nsim_bus_dev->dev); + err = devlink_traps_register(devlink, nsim_traps_arr, + ARRAY_SIZE(nsim_traps_arr), NULL); if (err) - goto err_resources_unregister; + goto err_trap_items_free; - err = nsim_dev_debugfs_init(nsim_dev); - if (err) - goto err_dl_unregister; + 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)); - err = nsim_bpf_dev_init(nsim_dev); - if (err) - goto err_debugfs_exit; + return 0; - return nsim_dev; +err_trap_items_free: + kfree(nsim_trap_data->trap_items_arr); +err_trap_data_free: + kfree(nsim_trap_data); + return err; +} -err_debugfs_exit: - nsim_dev_debugfs_exit(nsim_dev); -err_dl_unregister: - devlink_unregister(devlink); -err_resources_unregister: - devlink_resources_unregister(devlink, NULL); -err_fib_destroy: - nsim_fib_destroy(nsim_dev->fib_data); -err_devlink_free: - devlink_free(devlink); - return ERR_PTR(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 void nsim_dev_destroy(struct nsim_dev *nsim_dev) +static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, + struct netlink_ext_ack *extack); +static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); + +static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, + struct netlink_ext_ack *extack) { - struct devlink *devlink = priv_to_devlink(nsim_dev); + struct nsim_dev *nsim_dev = devlink_priv(devlink); - nsim_bpf_dev_exit(nsim_dev); - nsim_dev_debugfs_exit(nsim_dev); - devlink_unregister(devlink); - devlink_resources_unregister(devlink, NULL); - nsim_fib_destroy(nsim_dev->fib_data); - mutex_destroy(&nsim_dev->port_list_lock); - devlink_free(devlink); + if (nsim_dev->dont_allow_reload) { + /* For testing purposes, user set debugfs dont_allow_reload + * value to true. So forbid it. + */ + NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); + return -EOPNOTSUPP; + } + + nsim_dev_reload_destroy(nsim_dev); + return 0; +} + +static int nsim_dev_reload_up(struct devlink *devlink, + struct netlink_ext_ack *extack) +{ + struct nsim_dev *nsim_dev = devlink_priv(devlink); + + if (nsim_dev->fail_reload) { + /* For testing purposes, user set debugfs fail_reload + * value to true. Fail right away. + */ + NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); + return -EINVAL; + } + + return nsim_dev_reload_create(nsim_dev, extack); } +static int nsim_dev_info_get(struct devlink *devlink, + struct devlink_info_req *req, + struct netlink_ext_ack *extack) +{ + return devlink_info_driver_name_put(req, DRV_NAME); +} + +#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, + .info_get = nsim_dev_info_get, + .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 int __nsim_dev_port_add(struct nsim_dev *nsim_dev, unsigned int port_index) { @@ -353,23 +681,19 @@ 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) +static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, + unsigned int port_count) { - 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); + int i, err; - for (i = 0; i < nsim_bus_dev->port_count; i++) { + for (i = 0; i < port_count; i++) { err = __nsim_dev_port_add(nsim_dev, i); if (err) goto err_port_del_all; @@ -378,16 +702,181 @@ int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) err_port_del_all: nsim_dev_port_del_all(nsim_dev); - nsim_dev_destroy(nsim_dev); return err; } +static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, + struct netlink_ext_ack *extack) +{ + struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; + struct devlink *devlink; + int err; + + devlink = priv_to_devlink(nsim_dev); + nsim_dev = devlink_priv(devlink); + INIT_LIST_HEAD(&nsim_dev->port_list); + mutex_init(&nsim_dev->port_list_lock); + nsim_dev->fw_update_status = true; + + nsim_dev->fib_data = nsim_fib_create(devlink, extack); + if (IS_ERR(nsim_dev->fib_data)) + return PTR_ERR(nsim_dev->fib_data); + + nsim_devlink_param_load_driverinit_values(devlink); + + err = nsim_dev_dummy_region_init(nsim_dev, devlink); + if (err) + goto err_fib_destroy; + + err = nsim_dev_traps_init(devlink); + if (err) + goto err_dummy_region_exit; + + err = nsim_dev_health_init(nsim_dev, devlink); + if (err) + goto err_traps_exit; + + err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); + if (err) + goto err_health_exit; + + return 0; + +err_health_exit: + nsim_dev_health_exit(nsim_dev); +err_traps_exit: + nsim_dev_traps_exit(devlink); +err_dummy_region_exit: + nsim_dev_dummy_region_exit(nsim_dev); +err_fib_destroy: + nsim_fib_destroy(devlink, nsim_dev->fib_data); + return err; +} + +int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) +{ + struct nsim_dev *nsim_dev; + struct devlink *devlink; + int err; + + devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); + if (!devlink) + return -ENOMEM; + devlink_net_set(devlink, nsim_bus_dev->initial_net); + 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; + + dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); + + err = nsim_dev_resources_register(devlink); + if (err) + goto err_devlink_free; + + nsim_dev->fib_data = nsim_fib_create(devlink, NULL); + if (IS_ERR(nsim_dev->fib_data)) { + err = PTR_ERR(nsim_dev->fib_data); + goto err_resources_unregister; + } + + err = devlink_register(devlink, &nsim_bus_dev->dev); + if (err) + goto err_fib_destroy; + + 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_dev_health_init(nsim_dev, devlink); + if (err) + goto err_debugfs_exit; + + err = nsim_bpf_dev_init(nsim_dev); + if (err) + goto err_health_exit; + + err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); + if (err) + goto err_bpf_dev_exit; + + devlink_params_publish(devlink); + devlink_reload_enable(devlink); + return 0; + +err_bpf_dev_exit: + nsim_bpf_dev_exit(nsim_dev); +err_health_exit: + nsim_dev_health_exit(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_fib_destroy: + nsim_fib_destroy(devlink, nsim_dev->fib_data); +err_resources_unregister: + devlink_resources_unregister(devlink, NULL); +err_devlink_free: + devlink_free(devlink); + return err; +} + +static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) +{ + struct devlink *devlink = priv_to_devlink(nsim_dev); + + if (devlink_is_reload_failed(devlink)) + return; + nsim_dev_port_del_all(nsim_dev); + nsim_dev_health_exit(nsim_dev); + nsim_dev_traps_exit(devlink); + nsim_dev_dummy_region_exit(nsim_dev); + mutex_destroy(&nsim_dev->port_list_lock); + nsim_fib_destroy(devlink, nsim_dev->fib_data); +} + void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) { struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); + struct devlink *devlink = priv_to_devlink(nsim_dev); - nsim_dev_port_del_all(nsim_dev); - nsim_dev_destroy(nsim_dev); + devlink_reload_disable(devlink); + + nsim_dev_reload_destroy(nsim_dev); + + nsim_bpf_dev_exit(nsim_dev); + nsim_dev_debugfs_exit(nsim_dev); + devlink_params_unregister(devlink, nsim_devlink_params, + ARRAY_SIZE(nsim_devlink_params)); + devlink_unregister(devlink); + devlink_resources_unregister(devlink, NULL); + devlink_free(devlink); } static struct nsim_dev_port * |