devlink: Add support for reload
Add support for performing driver hot reload.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 89b3704..4c3d855 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2515,6 +2515,45 @@ static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
}
+static int
+devlink_resources_validate(struct devlink *devlink,
+ struct devlink_resource *resource,
+ struct genl_info *info)
+{
+ struct list_head *resource_list;
+ int err = 0;
+
+ if (resource)
+ resource_list = &resource->resource_list;
+ else
+ resource_list = &devlink->resource_list;
+
+ list_for_each_entry(resource, resource_list, list) {
+ if (!resource->size_valid)
+ return -EINVAL;
+ err = devlink_resources_validate(devlink, resource, info);
+ if (err)
+ return err;
+ }
+ return err;
+}
+
+static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ int err;
+
+ if (!devlink->ops->reload)
+ return -EOPNOTSUPP;
+
+ err = devlink_resources_validate(devlink, NULL, info);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
+ return err;
+ }
+ return devlink->ops->reload(devlink);
+}
+
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@@ -2709,6 +2748,14 @@ static const struct genl_ops devlink_nl_ops[] = {
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
+ {
+ .cmd = DEVLINK_CMD_RELOAD,
+ .doit = devlink_nl_cmd_reload,
+ .policy = devlink_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ DEVLINK_NL_FLAG_NO_LOCK,
+ },
};
static struct genl_family devlink_nl_family __ro_after_init = {