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Message-Id: <20191002161231.2987-12-jiri@resnulli.us>
Date: Wed, 2 Oct 2019 18:12:27 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, idosch@...lanox.com, dsahern@...il.com,
jakub.kicinski@...ronome.com, tariqt@...lanox.com,
saeedm@...lanox.com, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
shuah@...nel.org, mlxsw@...lanox.com
Subject: [patch net-next v2 11/15] netdevsim: implement proper devlink reload
From: Jiri Pirko <jiri@...lanox.com>
During devlink reload, all driver objects should be reinstantiated with
the exception of devlink instance and devlink resources and params.
Move existing devlink_resource_size_get() calls into fib_create() just
before fib notifier is registered. Also, make sure that extack is
propagated down to fib_notifier_register() call.
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
v1->v2:
- don't reinstantiate debugfs during reload.
---
drivers/net/netdevsim/dev.c | 160 +++++++++++++++++-------------
drivers/net/netdevsim/fib.c | 53 +++++-----
drivers/net/netdevsim/netdevsim.h | 8 +-
3 files changed, 124 insertions(+), 97 deletions(-)
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 3cc101aee991..c04312359e4f 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -469,37 +469,28 @@ static void nsim_dev_traps_exit(struct devlink *devlink)
kfree(nsim_dev->trap_data);
}
+static struct nsim_dev *
+nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, struct nsim_dev *nsim_dev,
+ struct netlink_ext_ack *extack);
+static void nsim_dev_destroy(struct nsim_dev *nsim_dev, bool reload);
+
static int nsim_dev_reload_down(struct devlink *devlink,
struct netlink_ext_ack *extack)
{
+ struct nsim_dev *nsim_dev = devlink_priv(devlink);
+
+ nsim_dev_destroy(nsim_dev, true);
return 0;
}
static int nsim_dev_reload_up(struct devlink *devlink,
struct netlink_ext_ack *extack)
+
{
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;
- 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;
- }
- }
- nsim_devlink_param_load_driverinit_values(devlink);
-
- return 0;
+ nsim_dev = nsim_dev_create(nsim_dev->nsim_bus_dev, nsim_dev, extack);
+ return PTR_ERR_OR_ZERO(nsim_dev);
}
#define NSIM_DEV_FLASH_SIZE 500000
@@ -688,15 +679,21 @@ static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
}
static struct nsim_dev *
-nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev)
+nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, struct nsim_dev *nsim_dev,
+ struct netlink_ext_ack *extack)
{
- struct nsim_dev *nsim_dev;
+ bool reload = !!nsim_dev;
struct devlink *devlink;
int err;
- devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
- if (!devlink)
- return ERR_PTR(-ENOMEM);
+ if (!reload) {
+ devlink = devlink_alloc(&nsim_dev_devlink_ops,
+ sizeof(*nsim_dev));
+ if (!devlink)
+ return ERR_PTR(-ENOMEM);
+ } else {
+ devlink = priv_to_devlink(nsim_dev);
+ }
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);
@@ -704,28 +701,35 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev)
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;
+ if (!reload) {
+ err = nsim_dev_resources_register(devlink);
+ if (err)
+ goto err_devlink_free;
+ }
- nsim_dev->fib_data = nsim_fib_create(devlink);
+ nsim_dev->fib_data = nsim_fib_create(devlink, extack);
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;
+ if (!reload) {
+ nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
+ nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
- 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 = 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);
+ } else {
+ nsim_devlink_param_load_driverinit_values(devlink);
+ }
err = nsim_dev_dummy_region_init(nsim_dev, devlink);
if (err)
@@ -735,66 +739,86 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev)
if (err)
goto err_dummy_region_exit;
- err = nsim_dev_debugfs_init(nsim_dev);
- if (err)
- goto err_traps_exit;
+ if (!reload) {
+ 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;
+ err = nsim_bpf_dev_init(nsim_dev);
+ if (err)
+ goto err_debugfs_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);
+ if (reload)
+ devlink_params_publish(devlink);
return nsim_dev;
err_bpf_dev_exit:
- nsim_bpf_dev_exit(nsim_dev);
+ if (!reload) {
+ nsim_bpf_dev_exit(nsim_dev);
err_debugfs_exit:
- nsim_dev_debugfs_exit(nsim_dev);
+ 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));
+ if (!reload) {
+ devlink_params_unregister(devlink, nsim_devlink_params,
+ ARRAY_SIZE(nsim_devlink_params));
err_dl_unregister:
- devlink_unregister(devlink);
+ devlink_unregister(devlink);
+ }
err_fib_destroy:
nsim_fib_destroy(devlink, nsim_dev->fib_data);
err_resources_unregister:
- devlink_resources_unregister(devlink, NULL);
+ if (!reload) {
+ devlink_resources_unregister(devlink, NULL);
err_devlink_free:
- devlink_free(devlink);
+ devlink_free(devlink);
+ }
return ERR_PTR(err);
}
-static void nsim_dev_destroy(struct nsim_dev *nsim_dev)
+static void nsim_dev_destroy(struct nsim_dev *nsim_dev, bool reload)
{
struct devlink *devlink = priv_to_devlink(nsim_dev);
- nsim_dev_port_del_all(nsim_dev);
- 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);
- nsim_fib_destroy(devlink, nsim_dev->fib_data);
- devlink_resources_unregister(devlink, NULL);
- mutex_destroy(&nsim_dev->port_list_lock);
- devlink_free(devlink);
+ if (!devlink_is_reload_failed(devlink))
+ nsim_dev_port_del_all(nsim_dev);
+ if (!reload) {
+ nsim_bpf_dev_exit(nsim_dev);
+ nsim_dev_debugfs_exit(nsim_dev);
+ }
+ if (!devlink_is_reload_failed(devlink)) {
+ nsim_dev_traps_exit(devlink);
+ nsim_dev_dummy_region_exit(nsim_dev);
+ mutex_destroy(&nsim_dev->port_list_lock);
+ }
+ if (!reload) {
+ devlink_params_unregister(devlink, nsim_devlink_params,
+ ARRAY_SIZE(nsim_devlink_params));
+ devlink_unregister(devlink);
+ }
+ if (!devlink_is_reload_failed(devlink))
+ nsim_fib_destroy(devlink, nsim_dev->fib_data);
+ if (!reload) {
+ devlink_resources_unregister(devlink, NULL);
+ mutex_destroy(&nsim_dev->port_list_lock);
+ devlink_free(devlink);
+ }
}
int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
{
struct nsim_dev *nsim_dev;
- nsim_dev = nsim_dev_create(nsim_bus_dev);
+ nsim_dev = nsim_dev_create(nsim_bus_dev, NULL, NULL);
if (IS_ERR(nsim_dev))
return PTR_ERR(nsim_dev);
dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
@@ -806,7 +830,7 @@ 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_destroy(nsim_dev);
+ nsim_dev_destroy(nsim_dev, false);
}
static struct nsim_dev_port *
diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index d2aeac0f4c2c..fdc682f3a09a 100644
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -63,12 +63,10 @@ u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
return max ? entry->max : entry->num;
}
-int nsim_fib_set_max(struct nsim_fib_data *fib_data,
- enum nsim_resource_id res_id, u64 val,
- struct netlink_ext_ack *extack)
+static void nsim_fib_set_max(struct nsim_fib_data *fib_data,
+ enum nsim_resource_id res_id, u64 val)
{
struct nsim_fib_entry *entry;
- int err = 0;
switch (res_id) {
case NSIM_RESOURCE_IPV4_FIB:
@@ -84,20 +82,10 @@ int nsim_fib_set_max(struct nsim_fib_data *fib_data,
entry = &fib_data->ipv6.rules;
break;
default:
- return 0;
- }
-
- /* not allowing a new max to be less than curren occupancy
- * --> no means of evicting entries
- */
- if (val < entry->num) {
- NL_SET_ERR_MSG_MOD(extack, "New size is less than current occupancy");
- err = -EINVAL;
- } else {
- entry->max = val;
+ WARN_ON(1);
+ return;
}
-
- return err;
+ entry->max = val;
}
static int nsim_fib_rule_account(struct nsim_fib_entry *entry, bool add,
@@ -239,7 +227,28 @@ static u64 nsim_fib_ipv6_rules_res_occ_get(void *priv)
return nsim_fib_get_val(data, NSIM_RESOURCE_IPV6_FIB_RULES, false);
}
-struct nsim_fib_data *nsim_fib_create(struct devlink *devlink)
+static void nsim_fib_set_max_all(struct nsim_fib_data *data,
+ struct devlink *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;
+
+ 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)
+ val = (u64) -1;
+ nsim_fib_set_max(data, res_ids[i], val);
+ }
+}
+
+struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
+ struct netlink_ext_ack *extack)
{
struct nsim_fib_data *data;
int err;
@@ -248,15 +257,11 @@ struct nsim_fib_data *nsim_fib_create(struct devlink *devlink)
if (!data)
return ERR_PTR(-ENOMEM);
- data->ipv4.fib.max = (u64)-1;
- data->ipv4.rules.max = (u64)-1;
-
- data->ipv6.fib.max = (u64)-1;
- data->ipv6.rules.max = (u64)-1;
+ nsim_fib_set_max_all(data, devlink);
data->fib_nb.notifier_call = nsim_fib_event_nb;
err = register_fib_notifier(&init_net, &data->fib_nb,
- nsim_fib_dump_inconsistent, NULL);
+ nsim_fib_dump_inconsistent, extack);
if (err) {
pr_err("Failed to register fib notifier\n");
goto err_out;
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index ac506cf253b6..702d951fe160 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -173,13 +173,11 @@ int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
unsigned int port_index);
-struct nsim_fib_data *nsim_fib_create(struct devlink *devlink);
-void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *data);
+struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
+ struct netlink_ext_ack *extack);
+void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
enum nsim_resource_id res_id, bool max);
-int nsim_fib_set_max(struct nsim_fib_data *fib_data,
- enum nsim_resource_id res_id, u64 val,
- struct netlink_ext_ack *extack);
#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
void nsim_ipsec_init(struct netdevsim *ns);
--
2.21.0
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