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Date: Thu, 11 Sep 2014 10:29:21 +0200
From: <richard.alpe@...csson.com>
To: <netdev@...r.kernel.org>
CC: <tipc-discussion@...ts.sourceforge.net>,
Richard Alpe <richard.alpe@...csson.com>
Subject: [PATCH net-next 08/14] tipc: add media get/dump to new netlink api
From: Richard Alpe <richard.alpe@...csson.com>
Add TIPC_NL_MEDIA_GET command to the new tipc netlink API.
This command supports dumping all information about all defined
media as well as getting all information about a specific media.
The information about a media includes name and link properties.
Netlink logical layout of media get response message:
-> media
-> name
-> link properties
-> tolerance
-> priority
-> window
Signed-off-by: Richard Alpe <richard.alpe@...csson.com>
Reviewed-by: Erik Hugne <erik.hugne@...csson.com>
Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
Acked-by: Ying Xue <ying.xue@...driver.com>
---
include/uapi/linux/tipc_config.h | 12 ++++
net/tipc/bearer.c | 125 ++++++++++++++++++++++++++++++++++++++
net/tipc/bearer.h | 3 +
net/tipc/netlink.c | 7 +++
4 files changed, 147 insertions(+)
diff --git a/include/uapi/linux/tipc_config.h b/include/uapi/linux/tipc_config.h
index b5bedf1..33b5171 100644
--- a/include/uapi/linux/tipc_config.h
+++ b/include/uapi/linux/tipc_config.h
@@ -58,6 +58,7 @@ enum {
TIPC_NL_LINK_GET,
TIPC_NL_LINK_SET,
TIPC_NL_LINK_RESET_STATS,
+ TIPC_NL_MEDIA_GET,
__TIPC_NL_CMD_MAX,
TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
@@ -69,6 +70,7 @@ enum {
TIPC_NLA_BEARER, /* nest */
TIPC_NLA_SOCK, /* nest */
TIPC_NLA_LINK, /* nest */
+ TIPC_NLA_MEDIA, /* nest */
__TIPC_NLA_MAX,
TIPC_NLA_MAX = __TIPC_NLA_MAX - 1
@@ -114,6 +116,16 @@ enum {
TIPC_NLA_LINK_MAX = __TIPC_NLA_LINK_MAX - 1
};
+/* Media info */
+enum {
+ TIPC_NLA_MEDIA_UNSPEC,
+ TIPC_NLA_MEDIA_NAME, /* string */
+ TIPC_NLA_MEDIA_PROP, /* nest */
+
+ __TIPC_NLA_MEDIA_MAX,
+ TIPC_NLA_MEDIA_MAX = __TIPC_NLA_MEDIA_MAX - 1
+};
+
/* Nest, publication info */
enum {
TIPC_NLA_PUBL_UNSPEC,
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 906e644..ad33e44 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -61,6 +61,12 @@ tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
[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);
@@ -898,3 +904,122 @@ int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
return 0;
}
+
+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_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;
+}
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h
index c6cf9df..bacd225 100644
--- a/net/tipc/bearer.h
+++ b/net/tipc/bearer.h
@@ -184,6 +184,9 @@ int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);
+int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
+
int tipc_media_set_priority(const char *name, u32 new_value);
int tipc_media_set_window(const char *name, u32 new_value);
void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index de51267..d012857 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -76,6 +76,7 @@ static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
[TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
[TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
[TIPC_NLA_LINK] = { .type = NLA_NESTED, },
+ [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
};
struct genl_family tipc_genl_family = {
@@ -133,6 +134,12 @@ static const struct genl_ops tipc_genl_ops[] = {
.cmd = TIPC_NL_LINK_RESET_STATS,
.doit = tipc_nl_link_reset_stats,
.policy = tipc_nl_policy,
+ },
+ {
+ .cmd = TIPC_NL_MEDIA_GET,
+ .doit = tipc_nl_media_get,
+ .dumpit = tipc_nl_media_dump,
+ .policy = tipc_nl_policy,
}
};
--
1.7.10.4
--
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