diff options
author | Richard Alpe <richard.alpe@ericsson.com> | 2014-11-20 10:29:15 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-11-21 15:01:31 -0500 |
commit | 46f15c6794fb744bb7741d26143a85b9012c10d4 (patch) | |
tree | 29c63892638de7511ccc87c1970462a7e888e979 /net/tipc | |
parent | ae36342b50a91cff188e417201452dc075a8f444 (diff) | |
download | linux-46f15c6794fb744bb7741d26143a85b9012c10d4.tar.bz2 |
tipc: add media get/dump to new netlink api
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@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r-- | net/tipc/bearer.c | 125 | ||||
-rw-r--r-- | net/tipc/bearer.h | 3 | ||||
-rw-r--r-- | net/tipc/netlink.c | 7 |
3 files changed, 135 insertions, 0 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 6d547d0b3f31..26630a51fcae 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_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; +} diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index c6cf9df31375..bacd225bccfb 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 68bfd11f232d..742e51a0afbb 100644 --- a/net/tipc/netlink.c +++ b/net/tipc/netlink.c @@ -77,6 +77,7 @@ static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { [TIPC_NLA_SOCK] = { .type = NLA_NESTED, }, [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }, [TIPC_NLA_LINK] = { .type = NLA_NESTED, }, + [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, }, }; /* Legacy ASCII API */ @@ -154,6 +155,12 @@ static const struct genl_ops tipc_genl_v2_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, } }; |