/*
* net/tipc/bearer.c: TIPC bearer code
*
- * Copyright (c) 1996-2006, 2013, Ericsson AB
+ * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
* Copyright (c) 2004-2006, 2010-2013, Wind River Systems
* All rights reserved.
*
#include "core.h"
#include "config.h"
#include "bearer.h"
+#include "link.h"
#include "discover.h"
#define MAX_ADDR_STR 60
NULL
};
+static const struct nla_policy
+tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
+ [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
+ [TIPC_NLA_BEARER_NAME] = {
+ .type = NLA_STRING,
+ .len = TIPC_MAX_BEARER_NAME
+ },
+ [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
+ [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
+};
+
+static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
+ [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
+ [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
+ [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
+};
+
struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down);
}
}
}
+
+/* Caller should hold rtnl_lock to protect the bearer */
+static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
+ struct tipc_bearer *bearer)
+{
+ void *hdr;
+ struct nlattr *attrs;
+ struct nlattr *prop;
+
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ NLM_F_MULTI, TIPC_NL_BEARER_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
+ if (!attrs)
+ goto msg_full;
+
+ if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
+ goto attr_msg_full;
+
+ prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
+ if (!prop)
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
+ goto prop_msg_full;
+
+ nla_nest_end(msg->skb, prop);
+ nla_nest_end(msg->skb, attrs);
+ genlmsg_end(msg->skb, hdr);
+
+ return 0;
+
+prop_msg_full:
+ nla_nest_cancel(msg->skb, prop);
+attr_msg_full:
+ nla_nest_cancel(msg->skb, attrs);
+msg_full:
+ genlmsg_cancel(msg->skb, hdr);
+
+ return -EMSGSIZE;
+}
+
+int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ int i = cb->args[0];
+ struct tipc_bearer *bearer;
+ struct tipc_nl_msg msg;
+
+ if (i == MAX_BEARERS)
+ return 0;
+
+ msg.skb = skb;
+ msg.portid = NETLINK_CB(cb->skb).portid;
+ msg.seq = cb->nlh->nlmsg_seq;
+
+ rtnl_lock();
+ for (i = 0; i < MAX_BEARERS; i++) {
+ bearer = rtnl_dereference(bearer_list[i]);
+ if (!bearer)
+ continue;
+
+ err = __tipc_nl_add_bearer(&msg, bearer);
+ if (err)
+ break;
+ }
+ rtnl_unlock();
+
+ cb->args[0] = i;
+ return skb->len;
+}
+
+int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct sk_buff *rep;
+ struct tipc_bearer *bearer;
+ struct tipc_nl_msg msg;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!rep)
+ return -ENOMEM;
+
+ msg.skb = rep;
+ msg.portid = info->snd_portid;
+ msg.seq = info->snd_seq;
+
+ rtnl_lock();
+ bearer = tipc_bearer_find(name);
+ if (!bearer) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = __tipc_nl_add_bearer(&msg, bearer);
+ if (err)
+ goto err_out;
+ rtnl_unlock();
+
+ return genlmsg_reply(rep, info);
+err_out:
+ rtnl_unlock();
+ nlmsg_free(rep);
+
+ return err;
+}
+
+int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_bearer *bearer;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ rtnl_lock();
+ bearer = tipc_bearer_find(name);
+ if (!bearer) {
+ rtnl_unlock();
+ return -EINVAL;
+ }
+
+ bearer_disable(bearer, false);
+ rtnl_unlock();
+
+ return 0;
+}
+
+int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *bearer;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ u32 domain;
+ u32 prio;
+
+ prio = TIPC_MEDIA_LINK_PRI;
+ domain = tipc_own_addr & TIPC_CLUSTER_MASK;
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+
+ bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ if (attrs[TIPC_NLA_BEARER_DOMAIN])
+ domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
+
+ if (attrs[TIPC_NLA_BEARER_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
+ props);
+ if (err)
+ return err;
+
+ if (props[TIPC_NLA_PROP_PRIO])
+ prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ }
+
+ rtnl_lock();
+ err = tipc_enable_bearer(bearer, domain, prio);
+ if (err) {
+ rtnl_unlock();
+ return err;
+ }
+ rtnl_unlock();
+
+ return 0;
+}
+
+int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_bearer *b;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ rtnl_lock();
+ b = tipc_bearer_find(name);
+ if (!b) {
+ rtnl_unlock();
+ return -EINVAL;
+ }
+
+ if (attrs[TIPC_NLA_BEARER_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
+ props);
+ if (err) {
+ rtnl_unlock();
+ return err;
+ }
+
+ if (props[TIPC_NLA_PROP_TOL])
+ b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+ if (props[TIPC_NLA_PROP_PRIO])
+ b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ if (props[TIPC_NLA_PROP_WIN])
+ b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+ }
+ rtnl_unlock();
+
+ return 0;
+}
+
+static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
+ struct tipc_media *media)
+{
+ void *hdr;
+ struct nlattr *attrs;
+ struct nlattr *prop;
+
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ NLM_F_MULTI, TIPC_NL_MEDIA_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
+ if (!attrs)
+ goto msg_full;
+
+ if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
+ goto attr_msg_full;
+
+ prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
+ if (!prop)
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
+ goto prop_msg_full;
+
+ nla_nest_end(msg->skb, prop);
+ nla_nest_end(msg->skb, attrs);
+ genlmsg_end(msg->skb, hdr);
+
+ return 0;
+
+prop_msg_full:
+ nla_nest_cancel(msg->skb, prop);
+attr_msg_full:
+ nla_nest_cancel(msg->skb, attrs);
+msg_full:
+ genlmsg_cancel(msg->skb, hdr);
+
+ return -EMSGSIZE;
+}
+
+int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ int i = cb->args[0];
+ struct tipc_nl_msg msg;
+
+ if (i == MAX_MEDIA)
+ return 0;
+
+ msg.skb = skb;
+ msg.portid = NETLINK_CB(cb->skb).portid;
+ msg.seq = cb->nlh->nlmsg_seq;
+
+ rtnl_lock();
+ for (; media_info_array[i] != NULL; i++) {
+ err = __tipc_nl_add_media(&msg, media_info_array[i]);
+ if (err)
+ break;
+ }
+ rtnl_unlock();
+
+ cb->args[0] = i;
+ return skb->len;
+}
+
+int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_nl_msg msg;
+ struct tipc_media *media;
+ struct sk_buff *rep;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_MEDIA])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
+ info->attrs[TIPC_NLA_MEDIA],
+ tipc_nl_media_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_MEDIA_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
+
+ rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!rep)
+ return -ENOMEM;
+
+ msg.skb = rep;
+ msg.portid = info->snd_portid;
+ msg.seq = info->snd_seq;
+
+ rtnl_lock();
+ media = tipc_media_find(name);
+ if (!media) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = __tipc_nl_add_media(&msg, media);
+ if (err)
+ goto err_out;
+ rtnl_unlock();
+
+ return genlmsg_reply(rep, info);
+err_out:
+ rtnl_unlock();
+ nlmsg_free(rep);
+
+ return err;
+}
+
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_media *m;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_MEDIA])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
+ info->attrs[TIPC_NLA_MEDIA],
+ tipc_nl_media_policy);
+
+ if (!attrs[TIPC_NLA_MEDIA_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
+
+ rtnl_lock();
+ m = tipc_media_find(name);
+ if (!m) {
+ rtnl_unlock();
+ return -EINVAL;
+ }
+
+ if (attrs[TIPC_NLA_MEDIA_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
+ props);
+ if (err) {
+ rtnl_unlock();
+ return err;
+ }
+
+ if (props[TIPC_NLA_PROP_TOL])
+ m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+ if (props[TIPC_NLA_PROP_PRIO])
+ m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ if (props[TIPC_NLA_PROP_WIN])
+ m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+ }
+ rtnl_unlock();
+
+ return 0;
+}
projects / cascardo / linux.git / blobdiff