diff options
Diffstat (limited to 'drivers/net/netdevsim')
| -rw-r--r-- | drivers/net/netdevsim/bpf.c | 10 | ||||
| -rw-r--r-- | drivers/net/netdevsim/bus.c | 64 | ||||
| -rw-r--r-- | drivers/net/netdevsim/dev.c | 35 | ||||
| -rw-r--r-- | drivers/net/netdevsim/fib.c | 674 | ||||
| -rw-r--r-- | drivers/net/netdevsim/health.c | 6 | ||||
| -rw-r--r-- | drivers/net/netdevsim/ipsec.c | 30 | ||||
| -rw-r--r-- | drivers/net/netdevsim/netdevsim.h | 4 | ||||
| -rw-r--r-- | drivers/net/netdevsim/sdev.c | 69 |
8 files changed, 772 insertions, 120 deletions
diff --git a/drivers/net/netdevsim/bpf.c b/drivers/net/netdevsim/bpf.c index 2b74425822ab..0b362b8dac17 100644 --- a/drivers/net/netdevsim/bpf.c +++ b/drivers/net/netdevsim/bpf.c @@ -218,6 +218,7 @@ static int nsim_bpf_create_prog(struct nsim_dev *nsim_dev, { struct nsim_bpf_bound_prog *state; char name[16]; + int ret; state = kzalloc(sizeof(*state), GFP_KERNEL); if (!state) @@ -230,9 +231,10 @@ static int nsim_bpf_create_prog(struct nsim_dev *nsim_dev, /* Program id is not populated yet when we create the state. */ sprintf(name, "%u", nsim_dev->prog_id_gen++); state->ddir = debugfs_create_dir(name, nsim_dev->ddir_bpf_bound_progs); - if (IS_ERR_OR_NULL(state->ddir)) { + if (IS_ERR(state->ddir)) { + ret = PTR_ERR(state->ddir); kfree(state); - return -ENOMEM; + return ret; } debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id); @@ -587,8 +589,8 @@ int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) nsim_dev->ddir_bpf_bound_progs = debugfs_create_dir("bpf_bound_progs", nsim_dev->ddir); - if (IS_ERR_OR_NULL(nsim_dev->ddir_bpf_bound_progs)) - return -ENOMEM; + if (IS_ERR(nsim_dev->ddir_bpf_bound_progs)) + return PTR_ERR(nsim_dev->ddir_bpf_bound_progs); nsim_dev->bpf_dev = bpf_offload_dev_create(&nsim_bpf_dev_ops, nsim_dev); err = PTR_ERR_OR_ZERO(nsim_dev->bpf_dev); diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c index 6aeed0c600f8..7971dc4f54f1 100644 --- a/drivers/net/netdevsim/bus.c +++ b/drivers/net/netdevsim/bus.c @@ -17,6 +17,7 @@ static DEFINE_IDA(nsim_bus_dev_ids); static LIST_HEAD(nsim_bus_dev_list); static DEFINE_MUTEX(nsim_bus_dev_list_lock); +static bool nsim_bus_enable; static struct nsim_bus_dev *to_nsim_bus_dev(struct device *dev) { @@ -28,7 +29,7 @@ static int nsim_bus_dev_vfs_enable(struct nsim_bus_dev *nsim_bus_dev, { nsim_bus_dev->vfconfigs = kcalloc(num_vfs, sizeof(struct nsim_vf_config), - GFP_KERNEL); + GFP_KERNEL | __GFP_NOWARN); if (!nsim_bus_dev->vfconfigs) return -ENOMEM; nsim_bus_dev->num_vfs = num_vfs; @@ -96,13 +97,25 @@ new_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); + struct nsim_dev *nsim_dev = dev_get_drvdata(dev); + struct devlink *devlink; unsigned int port_index; int ret; + /* Prevent to use nsim_bus_dev before initialization. */ + if (!smp_load_acquire(&nsim_bus_dev->init)) + return -EBUSY; ret = kstrtouint(buf, 0, &port_index); if (ret) return ret; + + devlink = priv_to_devlink(nsim_dev); + + mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock); + devlink_reload_disable(devlink); ret = nsim_dev_port_add(nsim_bus_dev, port_index); + devlink_reload_enable(devlink); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return ret ? ret : count; } @@ -113,13 +126,25 @@ del_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); + struct nsim_dev *nsim_dev = dev_get_drvdata(dev); + struct devlink *devlink; unsigned int port_index; int ret; + /* Prevent to use nsim_bus_dev before initialization. */ + if (!smp_load_acquire(&nsim_bus_dev->init)) + return -EBUSY; ret = kstrtouint(buf, 0, &port_index); if (ret) return ret; + + devlink = priv_to_devlink(nsim_dev); + + mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock); + devlink_reload_disable(devlink); ret = nsim_dev_port_del(nsim_bus_dev, port_index); + devlink_reload_enable(devlink); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return ret ? ret : count; } @@ -179,15 +204,30 @@ new_device_store(struct bus_type *bus, const char *buf, size_t count) pr_err("Format for adding new device is \"id port_count\" (uint uint).\n"); return -EINVAL; } - nsim_bus_dev = nsim_bus_dev_new(id, port_count); - if (IS_ERR(nsim_bus_dev)) - return PTR_ERR(nsim_bus_dev); mutex_lock(&nsim_bus_dev_list_lock); + /* Prevent to use resource before initialization. */ + if (!smp_load_acquire(&nsim_bus_enable)) { + err = -EBUSY; + goto err; + } + + nsim_bus_dev = nsim_bus_dev_new(id, port_count); + if (IS_ERR(nsim_bus_dev)) { + err = PTR_ERR(nsim_bus_dev); + goto err; + } + + /* Allow using nsim_bus_dev */ + smp_store_release(&nsim_bus_dev->init, true); + list_add_tail(&nsim_bus_dev->list, &nsim_bus_dev_list); mutex_unlock(&nsim_bus_dev_list_lock); return count; +err: + mutex_unlock(&nsim_bus_dev_list_lock); + return err; } static BUS_ATTR_WO(new_device); @@ -215,6 +255,11 @@ del_device_store(struct bus_type *bus, const char *buf, size_t count) err = -ENOENT; mutex_lock(&nsim_bus_dev_list_lock); + /* Prevent to use resource before initialization. */ + if (!smp_load_acquire(&nsim_bus_enable)) { + mutex_unlock(&nsim_bus_dev_list_lock); + return -EBUSY; + } list_for_each_entry_safe(nsim_bus_dev, tmp, &nsim_bus_dev_list, list) { if (nsim_bus_dev->dev.id != id) continue; @@ -284,6 +329,9 @@ nsim_bus_dev_new(unsigned int id, unsigned int port_count) nsim_bus_dev->dev.type = &nsim_bus_dev_type; nsim_bus_dev->port_count = port_count; nsim_bus_dev->initial_net = current->nsproxy->net_ns; + mutex_init(&nsim_bus_dev->nsim_bus_reload_lock); + /* Disallow using nsim_bus_dev */ + smp_store_release(&nsim_bus_dev->init, false); err = device_register(&nsim_bus_dev->dev); if (err) @@ -299,6 +347,8 @@ err_nsim_bus_dev_free: static void nsim_bus_dev_del(struct nsim_bus_dev *nsim_bus_dev) { + /* Disallow using nsim_bus_dev */ + smp_store_release(&nsim_bus_dev->init, false); device_unregister(&nsim_bus_dev->dev); ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id); kfree(nsim_bus_dev); @@ -320,6 +370,8 @@ int nsim_bus_init(void) err = driver_register(&nsim_driver); if (err) goto err_bus_unregister; + /* Allow using resources */ + smp_store_release(&nsim_bus_enable, true); return 0; err_bus_unregister: @@ -331,12 +383,16 @@ void nsim_bus_exit(void) { struct nsim_bus_dev *nsim_bus_dev, *tmp; + /* Disallow using resources */ + smp_store_release(&nsim_bus_enable, false); + mutex_lock(&nsim_bus_dev_list_lock); list_for_each_entry_safe(nsim_bus_dev, tmp, &nsim_bus_dev_list, list) { list_del(&nsim_bus_dev->list); nsim_bus_dev_del(nsim_bus_dev); } mutex_unlock(&nsim_bus_dev_list_lock); + driver_unregister(&nsim_driver); bus_unregister(&nsim_bus); } diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index 059711edfc61..d7706a0346f2 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -53,7 +53,7 @@ static ssize_t nsim_dev_take_snapshot_write(struct file *file, get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); - id = devlink_region_shapshot_id_get(priv_to_devlink(nsim_dev)); + id = devlink_region_snapshot_id_get(priv_to_devlink(nsim_dev)); err = devlink_region_snapshot_create(nsim_dev->dummy_region, dummy_data, id, kfree); if (err) { @@ -73,23 +73,26 @@ static const struct file_operations nsim_dev_take_snapshot_fops = { static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) { - char dev_ddir_name[16]; + 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; + if (IS_ERR(nsim_dev->ddir)) + return PTR_ERR(nsim_dev->ddir); 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; + if (IS_ERR(nsim_dev->ports_ddir)) + return PTR_ERR(nsim_dev->ports_ddir); 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); + nsim_dev->take_snapshot = 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, @@ -112,8 +115,8 @@ static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 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; + if (IS_ERR(nsim_dev_port->ddir)) + return PTR_ERR(nsim_dev_port->ddir); sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); @@ -270,7 +273,7 @@ struct nsim_trap_data { }; /* All driver-specific traps must be documented in - * Documentation/networking/devlink-trap-netdevsim.rst + * Documentation/networking/devlink/netdevsim.rst */ enum { NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, @@ -740,6 +743,11 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, if (err) goto err_health_exit; + nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", + 0200, + nsim_dev->ddir, + nsim_dev, + &nsim_dev_take_snapshot_fops); return 0; err_health_exit: @@ -853,6 +861,7 @@ static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) if (devlink_is_reload_failed(devlink)) return; + debugfs_remove(nsim_dev->take_snapshot); nsim_dev_port_del_all(nsim_dev); nsim_dev_health_exit(nsim_dev); nsim_dev_traps_exit(devlink); @@ -925,9 +934,7 @@ int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 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; + return PTR_ERR_OR_ZERO(nsim_dev_ddir); } void nsim_dev_exit(void) diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c index 13540dee7364..f32d56ac3e80 100644 --- a/drivers/net/netdevsim/fib.c +++ b/drivers/net/netdevsim/fib.c @@ -14,6 +14,12 @@ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. */ +#include <linux/in6.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/rhashtable.h> +#include <linux/spinlock_types.h> +#include <linux/types.h> #include <net/fib_notifier.h> #include <net/ip_fib.h> #include <net/ip6_fib.h> @@ -36,6 +42,48 @@ struct nsim_fib_data { struct notifier_block fib_nb; struct nsim_per_fib_data ipv4; struct nsim_per_fib_data ipv6; + struct rhashtable fib_rt_ht; + struct list_head fib_rt_list; + spinlock_t fib_lock; /* Protects hashtable, list and accounting */ + struct devlink *devlink; +}; + +struct nsim_fib_rt_key { + unsigned char addr[sizeof(struct in6_addr)]; + unsigned char prefix_len; + int family; + u32 tb_id; +}; + +struct nsim_fib_rt { + struct nsim_fib_rt_key key; + struct rhash_head ht_node; + struct list_head list; /* Member of fib_rt_list */ +}; + +struct nsim_fib4_rt { + struct nsim_fib_rt common; + struct fib_info *fi; + u8 tos; + u8 type; +}; + +struct nsim_fib6_rt { + struct nsim_fib_rt common; + struct list_head nh_list; + unsigned int nhs; +}; + +struct nsim_fib6_rt_nh { + struct list_head list; /* Member of nh_list */ + struct fib6_info *rt; +}; + +static const struct rhashtable_params nsim_fib_rt_ht_params = { + .key_offset = offsetof(struct nsim_fib_rt, key), + .head_offset = offsetof(struct nsim_fib_rt, ht_node), + .key_len = sizeof(struct nsim_fib_rt_key), + .automatic_shrinking = true, }; u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, @@ -144,18 +192,556 @@ static int nsim_fib_account(struct nsim_fib_entry *entry, bool add, return err; } +static void nsim_fib_rt_init(struct nsim_fib_data *data, + struct nsim_fib_rt *fib_rt, const void *addr, + size_t addr_len, unsigned int prefix_len, + int family, u32 tb_id) +{ + memcpy(fib_rt->key.addr, addr, addr_len); + fib_rt->key.prefix_len = prefix_len; + fib_rt->key.family = family; + fib_rt->key.tb_id = tb_id; + list_add(&fib_rt->list, &data->fib_rt_list); +} + +static void nsim_fib_rt_fini(struct nsim_fib_rt *fib_rt) +{ + list_del(&fib_rt->list); +} + +static struct nsim_fib_rt *nsim_fib_rt_lookup(struct rhashtable *fib_rt_ht, + const void *addr, size_t addr_len, + unsigned int prefix_len, + int family, u32 tb_id) +{ + struct nsim_fib_rt_key key; + + memset(&key, 0, sizeof(key)); + memcpy(key.addr, addr, addr_len); + key.prefix_len = prefix_len; + key.family = family; + key.tb_id = tb_id; + + return rhashtable_lookup_fast(fib_rt_ht, &key, nsim_fib_rt_ht_params); +} + +static struct nsim_fib4_rt * +nsim_fib4_rt_create(struct nsim_fib_data *data, + struct fib_entry_notifier_info *fen_info) +{ + struct nsim_fib4_rt *fib4_rt; + + fib4_rt = kzalloc(sizeof(*fib4_rt), GFP_ATOMIC); + if (!fib4_rt) + return NULL; + + nsim_fib_rt_init(data, &fib4_rt->common, &fen_info->dst, sizeof(u32), + fen_info->dst_len, AF_INET, fen_info->tb_id); + + fib4_rt->fi = fen_info->fi; + fib_info_hold(fib4_rt->fi); + fib4_rt->tos = fen_info->tos; + fib4_rt->type = fen_info->type; + + return fib4_rt; +} + +static void nsim_fib4_rt_destroy(struct nsim_fib4_rt *fib4_rt) +{ + fib_info_put(fib4_rt->fi); + nsim_fib_rt_fini(&fib4_rt->common); + kfree(fib4_rt); +} + +static struct nsim_fib4_rt * +nsim_fib4_rt_lookup(struct rhashtable *fib_rt_ht, + const struct fib_entry_notifier_info *fen_info) +{ + struct nsim_fib_rt *fib_rt; + + fib_rt = nsim_fib_rt_lookup(fib_rt_ht, &fen_info->dst, sizeof(u32), + fen_info->dst_len, AF_INET, + fen_info->tb_id); + if (!fib_rt) + return NULL; + + return container_of(fib_rt, struct nsim_fib4_rt, common); +} + +static void nsim_fib4_rt_hw_flags_set(struct net *net, + const struct nsim_fib4_rt *fib4_rt, + bool trap) +{ + u32 *p_dst = (u32 *) fib4_rt->common.key.addr; + int dst_len = fib4_rt->common.key.prefix_len; + struct fib_rt_info fri; + + fri.fi = fib4_rt->fi; + fri.tb_id = fib4_rt->common.key.tb_id; + fri.dst = cpu_to_be32(*p_dst); + fri.dst_len = dst_len; + fri.tos = fib4_rt->tos; + fri.type = fib4_rt->type; + fri.offload = false; + fri.trap = trap; + fib_alias_hw_flags_set(net, &fri); +} + +static int nsim_fib4_rt_add(struct nsim_fib_data *data, + struct nsim_fib4_rt *fib4_rt, + struct netlink_ext_ack *extack) +{ + struct net *net = devlink_net(data->devlink); + int err; + + err = nsim_fib_account(&data->ipv4.fib, true, extack); + if (err) + return err; + + err = rhashtable_insert_fast(&data->fib_rt_ht, + &fib4_rt->common.ht_node, + nsim_fib_rt_ht_params); + if (err) { + NL_SET_ERR_MSG_MOD(extack, "Failed to insert IPv4 route"); + goto err_fib_dismiss; + } + + nsim_fib4_rt_hw_flags_set(net, fib4_rt, true); + + return 0; + +err_fib_dismiss: + nsim_fib_account(&data->ipv4.fib, false, extack); + return err; +} + +static int nsim_fib4_rt_replace(struct nsim_fib_data *data, + struct nsim_fib4_rt *fib4_rt, + struct nsim_fib4_rt *fib4_rt_old, + struct netlink_ext_ack *extack) +{ + struct net *net = devlink_net(data->devlink); + int err; + + /* We are replacing a route, so no need to change the accounting. */ + err = rhashtable_replace_fast(&data->fib_rt_ht, + &fib4_rt_old->common.ht_node, + &fib4_rt->common.ht_node, + nsim_fib_rt_ht_params); + if (err) { + NL_SET_ERR_MSG_MOD(extack, "Failed to replace IPv4 route"); + return err; + } + + nsim_fib4_rt_hw_flags_set(net, fib4_rt, true); + + nsim_fib4_rt_hw_flags_set(net, fib4_rt_old, false); + nsim_fib4_rt_destroy(fib4_rt_old); + + return 0; +} + +static int nsim_fib4_rt_insert(struct nsim_fib_data *data, + struct fib_entry_notifier_info *fen_info) +{ + struct netlink_ext_ack *extack = fen_info->info.extack; + struct nsim_fib4_rt *fib4_rt, *fib4_rt_old; + int err; + + fib4_rt = nsim_fib4_rt_create(data, fen_info); + if (!fib4_rt) + return -ENOMEM; + + fib4_rt_old = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info); + if (!fib4_rt_old) + err = nsim_fib4_rt_add(data, fib4_rt, extack); + else + err = nsim_fib4_rt_replace(data, fib4_rt, fib4_rt_old, extack); + + if (err) + nsim_fib4_rt_destroy(fib4_rt); + + return err; +} + +static void nsim_fib4_rt_remove(struct nsim_fib_data *data, + const struct fib_entry_notifier_info *fen_info) +{ + struct netlink_ext_ack *extack = fen_info->info.extack; + struct nsim_fib4_rt *fib4_rt; + + fib4_rt = nsim_fib4_rt_lookup(&data->fib_rt_ht, fen_info); + if (WARN_ON_ONCE(!fib4_rt)) + return; + + rhashtable_remove_fast(&data->fib_rt_ht, &fib4_rt->common.ht_node, + nsim_fib_rt_ht_params); + nsim_fib_account(&data->ipv4.fib, false, extack); + nsim_fib4_rt_destroy(fib4_rt); +} + +static int nsim_fib4_event(struct nsim_fib_data *data, + struct fib_notifier_info *info, + unsigned long event) +{ + struct fib_entry_notifier_info *fen_info; + int err = 0; + + fen_info = container_of(info, struct fib_entry_notifier_info, info); + + if (fen_info->fi->nh) { + NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); + return 0; + } + + switch (event) { + case FIB_EVENT_ENTRY_REPLACE: + err = nsim_fib4_rt_insert(data, fen_info); + break; + case FIB_EVENT_ENTRY_DEL: + nsim_fib4_rt_remove(data, fen_info); + break; + default: + break; + } + + return err; +} + +static struct nsim_fib6_rt_nh * +nsim_fib6_rt_nh_find(const struct nsim_fib6_rt *fib6_rt, + const struct fib6_info *rt) +{ + struct nsim_fib6_rt_nh *fib6_rt_nh; + + list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list) { + if (fib6_rt_nh->rt == rt) + return fib6_rt_nh; + } + + return NULL; +} + +static int nsim_fib6_rt_nh_add(struct nsim_fib6_rt *fib6_rt, + struct fib6_info *rt) +{ + struct nsim_fib6_rt_nh *fib6_rt_nh; + + fib6_rt_nh = kzalloc(sizeof(*fib6_rt_nh), GFP_ATOMIC); + if (!fib6_rt_nh) + return -ENOMEM; + + fib6_info_hold(rt); + fib6_rt_nh->rt = rt; + list_add_tail(&fib6_rt_nh->list, &fib6_rt->nh_list); + fib6_rt->nhs++; + + return 0; +} + +static void nsim_fib6_rt_nh_del(struct nsim_fib6_rt *fib6_rt, + const struct fib6_info *rt) +{ + struct nsim_fib6_rt_nh *fib6_rt_nh; + + fib6_rt_nh = nsim_fib6_rt_nh_find(fib6_rt, rt); + if (WARN_ON_ONCE(!fib6_rt_nh)) + return; + + fib6_rt->nhs--; + list_del(&fib6_rt_nh->list); +#if IS_ENABLED(CONFIG_IPV6) + fib6_info_release(fib6_rt_nh->rt); +#endif + kfree(fib6_rt_nh); +} + +static struct nsim_fib6_rt * +nsim_fib6_rt_create(struct nsim_fib_data *data, + struct fib6_entry_notifier_info *fen6_info) +{ + struct fib6_info *iter, *rt = fen6_info->rt; + struct nsim_fib6_rt *fib6_rt; + int i = 0; + int err; + + fib6_rt = kzalloc(sizeof(*fib6_rt), GFP_ATOMIC); + if (!fib6_rt) + return ERR_PTR(-ENOMEM); + + nsim_fib_rt_init(data, &fib6_rt->common, &rt->fib6_dst.addr, + sizeof(rt->fib6_dst.addr), rt->fib6_dst.plen, AF_INET6, + rt->fib6_table->tb6_id); + + /* We consider a multipath IPv6 route as one entry, but it can be made + * up from several fib6_info structs (one for each nexthop), so we + * add them all to the same list under the entry. + */ + INIT_LIST_HEAD(&fib6_rt->nh_list); + + err = nsim_fib6_rt_nh_add(fib6_rt, rt); + if (err) + goto err_fib_rt_fini; + + if (!fen6_info->nsiblings) + return fib6_rt; + + list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { + if (i == fen6_info->nsiblings) + break; + + err = nsim_fib6_rt_nh_add(fib6_rt, iter); + if (err) + goto err_fib6_rt_nh_del; + i++; + } + WARN_ON_ONCE(i != fen6_info->nsiblings); + + return fib6_rt; + +err_fib6_rt_nh_del: + list_for_each_entry_continue_reverse(iter, &rt->fib6_siblings, + fib6_siblings) + nsim_fib6_rt_nh_del(fib6_rt, iter); + nsim_fib6_rt_nh_del(fib6_rt, rt); +err_fib_rt_fini: + nsim_fib_rt_fini(&fib6_rt->common); + kfree(fib6_rt); + return ERR_PTR(err); +} + +static void nsim_fib6_rt_destroy(struct nsim_fib6_rt *fib6_rt) +{ + struct nsim_fib6_rt_nh *iter, *tmp; + + list_for_each_entry_safe(iter, tmp, &fib6_rt->nh_list, list) + nsim_fib6_rt_nh_del(fib6_rt, iter->rt); + WARN_ON_ONCE(!list_empty(&fib6_rt->nh_list)); + nsim_fib_rt_fini(&fib6_rt->common); + kfree(fib6_rt); +} + +static struct nsim_fib6_rt * +nsim_fib6_rt_lookup(struct rhashtable *fib_rt_ht, const struct fib6_info *rt) +{ + struct nsim_fib_rt *fib_rt; + + fib_rt = nsim_fib_rt_lookup(fib_rt_ht, &rt->fib6_dst.addr, + sizeof(rt->fib6_dst.addr), + rt->fib6_dst.plen, AF_INET6, + rt->fib6_table->tb6_id); + if (!fib_rt) + return NULL; + + return container_of(fib_rt, struct nsim_fib6_rt, common); +} + +static int nsim_fib6_rt_append(struct nsim_fib_data *data, + struct fib6_entry_notifier_info *fen6_info) +{ + struct fib6_info *iter, *rt = fen6_info->rt; + struct nsim_fib6_rt *fib6_rt; + int i = 0; + int err; + + fib6_rt = nsim_fib6_rt_lookup(&data->fib_rt_ht, rt); + if (WARN_ON_ONCE(!fib6_rt)) + return -EINVAL; + + err = nsim_fib6_rt_nh_add(fib6_rt, rt); + if (err) + return err; + rt->trap = true; + + if (!fen6_info->nsiblings) + return 0; + + list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { + if (i == fen6_info->nsiblings) + break; + + err = nsim_fib6_rt_nh_add(fib6_rt, iter); + if (err) + goto err_fib6_rt_nh_del; + iter->trap = true; + i++; + } + WARN_ON_ONCE(i != fen6_info->nsiblings); + + return 0; + +err_fib6_rt_nh_del: + list_for_each_entry_continue_reverse(iter, &rt->fib6_siblings, + fib6_siblings) { + iter->trap = false; + nsim_fib6_rt_nh_del(fib6_rt, iter); + } + rt->trap = false; + nsim_fib6_rt_nh_del(fib6_rt, rt); + return err; +} + +static void nsim_fib6_rt_hw_flags_set(const struct nsim_fib6_rt *fib6_rt, + bool trap) +{ + struct nsim_fib6_rt_nh *fib6_rt_nh; + + list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list) + fib6_info_hw_flags_set(fib6_rt_nh->rt, false, trap); +} + +static int nsim_fib6_rt_add(struct nsim_fib_data *data, + struct nsim_fib6_rt *fib6_rt, + struct netlink_ext_ack *extack) +{ + int err; + + err = nsim_fib_account(&data->ipv6.fib, true, extack); + if (err) + return err; + + err = rhashtable_insert_fast(&data->fib_rt_ht, + &fib6_rt->common.ht_node, + nsim_fib_rt_ht_params); + if (err) { + NL_SET_ERR_MSG_MOD(extack, "Failed to insert IPv6 route"); + goto err_fib_dismiss; + } + + nsim_fib6_rt_hw_flags_set(fib6_rt, true); + + return 0; + +err_fib_dismiss: + nsim_fib_account(&data->ipv6.fib, false, extack); + return err; +} + +static int nsim_fib6_rt_replace(struct nsim_fib_data *data, + struct nsim_fib6_rt *fib6_rt, + struct nsim_fib6_rt *fib6_rt_old, + struct netlink_ext_ack *extack) +{ + int err; + + /* We are replacing a route, so no need to change the accounting. */ + err = rhashtable_replace_fast(&data->fib_rt_ht, + &fib6_rt_old->common.ht_node, + &fib6_rt->common.ht_node, + nsim_fib_rt_ht_params); + if (err) { + NL_SET_ERR_MSG_MOD(extack, "Failed to replace IPv6 route"); + return err; + } + + nsim_fib6_rt_hw_flags_set(fib6_rt, true); + + nsim_fib6_rt_hw_flags_set(fib6_rt_old, false); + nsim_fib6_rt_destroy(fib6_rt_old); + + return 0; +} + +static int nsim_fib6_rt_insert(struct nsim_fib_data *data, + struct fib6_entry_notifier_info *fen6_info) +{ + struct netlink_ext_ack *extack = fen6_info->info.extack; + struct nsim_fib6_rt *fib6_rt, *fib6_rt_old; + int err; + + fib6_rt = nsim_fib6_rt_create(data, fen6_info); + if (IS_ERR(fib6_rt)) + return PTR_ERR(fib6_rt); + + fib6_rt_old = nsim_fib6_rt_lookup(&data->fib_rt_ht, fen6_info->rt); + if (!fib6_rt_old) + err = nsim_fib6_rt_add(data, fib6_rt, extack); + else + err = nsim_fib6_rt_replace(data, fib6_rt, fib6_rt_old, extack); + + if (err) + nsim_fib6_rt_destroy(fib6_rt); + + return err; +} + +static void +nsim_fib6_rt_remove(struct nsim_fib_data *data, + const struct fib6_entry_notifier_info *fen6_info) +{ + struct netlink_ext_ack *extack = fen6_info->info.extack; + struct nsim_fib6_rt *fib6_rt; + + /* Multipath routes are first added to the FIB trie and only then + * notified. If we vetoed the addition, we will get a delete + * notification for a route we do not have. Therefore, do not warn if + * route was not found. + */ + fib6_rt = nsim_fib6_rt_lookup(&data->fib_rt_ht, fen6_info->rt); + if (!fib6_rt) + return; + + /* If not all the nexthops are deleted, then only reduce the nexthop + * group. + */ + if (fen6_info->nsiblings + 1 != fib6_rt->nhs) { + nsim_fib6_rt_nh_del(fib6_rt, fen6_info->rt); + return; + } + + rhashtable_remove_fast(&data->fib_rt_ht, &fib6_rt->common.ht_node, + nsim_fib_rt_ht_params); + nsim_fib_account(&data->ipv6.fib, false, extack); + nsim_fib6_rt_destroy(fib6_rt); +} + +static int nsim_fib6_event(struct nsim_fib_data *data, + struct fib_notifier_info *info, + unsigned long event) +{ + struct fib6_entry_notifier_info *fen6_info; + int err = 0; + + fen6_info = container_of(info, struct fib6_entry_notifier_info, info); + + if (fen6_info->rt->nh) { + NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported"); + return 0; + } + + if (fen6_info->rt->fib6_src.plen) { + NL_SET_ERR_MSG_MOD(info->extack, "IPv6 source-specific route is not supported"); + return 0; + } + + switch (event) { + case FIB_EVENT_ENTRY_REPLACE: + err = nsim_fib6_rt_insert(data, fen6_info); + break; + case FIB_EVENT_ENTRY_APPEND: + err = nsim_fib6_rt_append(data, fen6_info); + break; + case FIB_EVENT_ENTRY_DEL: + nsim_fib6_rt_remove(data, fen6_info); + break; + default: + break; + } + + return err; +} + static int nsim_fib_event(struct nsim_fib_data *data, - struct fib_notifier_info *info, bool add) + struct fib_notifier_info *info, unsigned long event) { - struct netlink_ext_ack *extack = info->extack; int err = 0; switch (info->family) { case AF_INET: - err = nsim_fib_account(&data->ipv4.fib, add, extack); + err = nsim_fib4_event(data, info, event); break; case AF_INET6: - err = nsim_fib_account(&data->ipv6.fib, add, extack); + err = nsim_fib6_event(data, info, event); break; } @@ -170,6 +756,9 @@ static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event, struct fib_notifier_info *info = ptr; int err = 0; + /* IPv6 routes can be added via RAs from softIRQ. */ + spin_lock_bh(&data->fib_lock); + switch (event) { case FIB_EVENT_RULE_ADD: /* fall through */ case FIB_EVENT_RULE_DEL: @@ -177,25 +766,75 @@ static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event, event == FIB_EVENT_RULE_ADD); break; - case FIB_EVENT_ENTRY_ADD: /* fall through */ + case FIB_EVENT_ENTRY_REPLACE: /* fall through */ + case FIB_EVENT_ENTRY_APPEND: /* fall through */ case FIB_EVENT_ENTRY_DEL: - err = nsim_fib_event(data, info, - event == FIB_EVENT_ENTRY_ADD); + err = nsim_fib_event(data, info, event); break; } + spin_unlock_bh(&data->fib_lock); + return notifier_from_errno(err); } +static void nsim_fib4_rt_free(struct nsim_fib_rt *fib_rt, + struct nsim_fib_data *data) +{ + struct devlink *devlink = data->devlink; + struct nsim_fib4_rt *fib4_rt; + + fib4_rt = container_of(fib_rt, struct nsim_fib4_rt, common); + nsim_fib4_rt_hw_flags_set(devlink_net(devlink), fib4_rt, false); + nsim_fib_account(&data->ipv4.fib, false, NULL); + nsim_fib4_rt_destroy(fib4_rt); +} + +static void nsim_fib6_rt_free(struct nsim_fib_rt *fib_rt, + struct nsim_fib_data *data) +{ + struct nsim_fib6_rt *fib6_rt; + + fib6_rt = container_of(fib_rt, struct nsim_fib6_rt, common); + nsim_fib6_rt_hw_flags_set(fib6_rt, false); + nsim_fib_account(&data->ipv6.fib, false, NULL); + nsim_fib6_rt_destroy(fib6_rt); +} + +static void nsim_fib_rt_free(void *ptr, void *arg) +{ + struct nsim_fib_rt *fib_rt = ptr; + struct nsim_fib_data *data = arg; + + switch (fib_rt->key.family) { + case AF_INET: + nsim_fib4_rt_free(fib_rt, data); + break; + case AF_INET6: + nsim_fib6_rt_free(fib_rt, data); + break; + default: + WARN_ON_ONCE(1); + } +} + /* inconsistent dump, trying again */ static void nsim_fib_dump_inconsistent(struct notifier_block *nb) { struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data, fib_nb); + struct nsim_fib_rt *fib_rt, *fib_rt_tmp; + + /* The notifier block is still not registered, so we do not need to + * take any locks here. + */ + list_for_each_entry_safe(fib_rt, fib_rt_tmp, &data->fib_rt_list, list) { + rhashtable_remove_fast(&data->fib_rt_ht, &fib_rt->ht_node, + nsim_fib_rt_ht_params); + nsim_fib_rt_free(fib_rt, data); + } - data->ipv4.fib.num = 0ULL; data->ipv4.rules.num = 0ULL; - data->ipv6.fib.num = 0ULL; data->ipv6.rules.num = 0ULL; } @@ -256,6 +895,13 @@ struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return ERR_PTR(-ENOMEM); + data->devlink = devlink; + + spin_lock_init(&data->fib_lock); + INIT_LIST_HEAD(&data->fib_rt_list); + err = rhashtable_init(&data->fib_rt_ht, &nsim_fib_rt_ht_params); + if (err) + goto err_data_free; nsim_fib_set_max_all(data, devlink); @@ -264,7 +910,7 @@ struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, nsim_fib_dump_inconsistent, extack); if (err) { pr_err("Failed to register fib notifier\n"); - goto err_out; + goto err_rhashtable_destroy; } devlink_resource_occ_get_register(devlink, @@ -285,7 +931,10 @@ struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, data); return data; -err_out: +err_rhashtable_destroy: + rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free, + data); +err_data_free: kfree(data); return ERR_PTR(err); } @@ -301,5 +950,8 @@ void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *data) devlink_resource_occ_get_unregister(devlink, NSIM_RESOURCE_IPV4_FIB); unregister_fib_notifier(devlink_net(devlink), &data->fib_nb); + rhashtable_free_and_destroy(&data->fib_rt_ht, nsim_fib_rt_free, + data); + WARN_ON_ONCE(!list_empty(&data->fib_rt_list)); kfree(data); } diff --git a/drivers/net/netdevsim/health.c b/drivers/net/netdevsim/health.c index 9aa637d162eb..ba8d9ad60feb 100644 --- a/drivers/net/netdevsim/health.c +++ b/drivers/net/netdevsim/health.c @@ -82,7 +82,7 @@ static int nsim_dev_dummy_fmsg_put(struct devlink_fmsg *fmsg, u32 binary_len) if (err) return err; - binary = kmalloc(binary_len, GFP_KERNEL); + binary = kmalloc(binary_len, GFP_KERNEL | __GFP_NOWARN); if (!binary) return -ENOMEM; get_random_bytes(binary, binary_len); @@ -285,8 +285,8 @@ int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink) } health->ddir = debugfs_create_dir("health", nsim_dev->ddir); - if (IS_ERR_OR_NULL(health->ddir)) { - err = PTR_ERR_OR_ZERO(health->ddir) ?: -EINVAL; + if (IS_ERR(health->ddir)) { + err = PTR_ERR(health->ddir); goto err_dummy_reporter_destroy; } diff --git a/drivers/net/netdevsim/ipsec.c b/drivers/net/netdevsim/ipsec.c index e27fc1a4516d..3811f1bde84e 100644 --- a/drivers/net/netdevsim/ipsec.c +++ b/drivers/net/netdevsim/ipsec.c @@ -29,9 +29,9 @@ static ssize_t nsim_dbg_netdev_ops_read(struct file *filp, return -ENOMEM; p = buf; - p += snprintf(p, bufsize - (p - buf), - "SA count=%u tx=%u\n", - ipsec->count, ipsec->tx); + p += scnprintf(p, bufsize - (p - buf), + "SA count=%u tx=%u\n", + ipsec->count, ipsec->tx); for (i = 0; i < NSIM_IPSEC_MAX_SA_COUNT; i++) { struct nsim_sa *sap = &ipsec->sa[i]; @@ -39,18 +39,18 @@ static ssize_t nsim_dbg_netdev_ops_read(struct file *filp, if (!sap->used) continue; - p += snprintf(p, bufsize - (p - buf), - "sa[%i] %cx ipaddr=0x%08x %08x %08x %08x\n", - i, (sap->rx ? 'r' : 't'), sap->ipaddr[0], - sap->ipaddr[1], sap->ipaddr[2], sap->ipaddr[3]); - p += snprintf(p, bufsize - (p - buf), - "sa[%i] spi=0x%08x proto=0x%x salt=0x%08x crypt=%d\n", - i, be32_to_cpu(sap->xs->id.spi), - sap->xs->id.proto, sap->salt, sap->crypt); - p += snprintf(p, bufsize - (p - buf), - "sa[%i] key=0x%08x %08x %08x %08x\n", - i, sap->key[0], sap->key[1], - sap->key[2], sap->key[3]); + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] %cx ipaddr=0x%08x %08x %08x %08x\n", + i, (sap->rx ? 'r' : 't'), sap->ipaddr[0], + sap->ipaddr[1], sap->ipaddr[2], sap->ipaddr[3]); + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] spi=0x%08x proto=0x%x salt=0x%08x crypt=%d\n", + i, be32_to_cpu(sap->xs->id.spi), + sap->xs->id.proto, sap->salt, sap->crypt); + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] key=0x%08x %08x %08x %08x\n", + i, sap->key[0], sap->key[1], + sap->key[2], sap->key[3]); } len = simple_read_from_buffer(buffer, count, ppos, buf, p - buf); diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 94df795ef4d3..2eb7b0dc1594 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -160,6 +160,7 @@ struct nsim_dev { struct nsim_trap_data *trap_data; struct dentry *ddir; struct dentry *ports_ddir; + struct dentry *take_snapshot; struct bpf_offload_dev *bpf_dev; bool bpf_bind_accept; u32 bpf_bind_verifier_delay; @@ -240,6 +241,9 @@ struct nsim_bus_dev { */ unsigned int num_vfs; struct nsim_vf_config *vfconfigs; + /* Lock for devlink->reload_enabled in netdevsim module */ + struct mutex nsim_bus_reload_lock; + bool init; }; int nsim_bus_init(void); diff --git a/drivers/net/netdevsim/sdev.c b/drivers/net/netdevsim/sdev.c deleted file mode 100644 index 6712da3340d6..000000000000 --- a/drivers/net/netdevsim/sdev.c +++ /dev/null @@ -1,69 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */ - -#include <linux/debugfs.h> -#include <linux/err.h> -#include <linux/kernel.h> -#include <linux/slab.h> - -#include "netdevsim.h" - -static struct dentry *nsim_sdev_ddir; - -static u32 nsim_sdev_id; - -struct netdevsim_shared_dev *nsim_sdev_get(struct netdevsim *joinns) -{ - struct netdevsim_shared_dev *sdev; - char sdev_ddir_name[10]; - int err; - - if (joinns) { - if (WARN_ON(!joinns->sdev)) - return ERR_PTR(-EINVAL); - sdev = joinns->sdev; - sdev->refcnt++; - return sdev; - } - - sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); - if (!sdev) - return ERR_PTR(-ENOMEM); - sdev->refcnt = 1; - sdev->switch_id = nsim_sdev_id++; - - sprintf(sdev_ddir_name, "%u", sdev->switch_id); - sdev->ddir = debugfs_create_dir(sdev_ddir_name, nsim_sdev_ddir); - if (IS_ERR_OR_NULL(sdev->ddir)) { - err = PTR_ERR_OR_ZERO(sdev->ddir) ?: -EINVAL; - goto err_sdev_free; - } - - return sdev; - -err_sdev_free: - nsim_sdev_id--; - kfree(sdev); - return ERR_PTR(err); -} - -void nsim_sdev_put(struct netdevsim_shared_dev *sdev) -{ - if (--sdev->refcnt) - return; - debugfs_remove_recursive(sdev->ddir); - kfree(sdev); -} - -int nsim_sdev_init(void) -{ - nsim_sdev_ddir = debugfs_create_dir(DRV_NAME "_sdev", NULL); - if (IS_ERR_OR_NULL(nsim_sdev_ddir)) - return -ENOMEM; - return 0; -} - -void nsim_sdev_exit(void) -{ - debugfs_remove_recursive(nsim_sdev_ddir); -} |