tipc: dump monitor attributes

In this commit, we dump the monitor attributes when queried.
The link monitor attributes are separated into two kinds:
1. general attributes per bearer
2. specific attributes per node/peer
This style resembles the socket attributes and the nametable
publications per socket.

Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parthasarathy Bhuvaragan 2016-07-26 08:47:22 +02:00 committed by David S. Miller
parent ff0d3e78a6
commit cf6f7e1d51
6 changed files with 260 additions and 0 deletions

View File

@ -58,6 +58,7 @@ enum {
TIPC_NL_NAME_TABLE_GET,
TIPC_NL_MON_SET,
TIPC_NL_MON_GET,
TIPC_NL_MON_PEER_GET,
__TIPC_NL_CMD_MAX,
TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
@ -75,6 +76,7 @@ enum {
TIPC_NLA_NET, /* nest */
TIPC_NLA_NAME_TABLE, /* nest */
TIPC_NLA_MON, /* nest */
TIPC_NLA_MON_PEER, /* nest */
__TIPC_NLA_MAX,
TIPC_NLA_MAX = __TIPC_NLA_MAX - 1
@ -173,6 +175,11 @@ enum {
enum {
TIPC_NLA_MON_UNSPEC,
TIPC_NLA_MON_ACTIVATION_THRESHOLD, /* u32 */
TIPC_NLA_MON_REF, /* u32 */
TIPC_NLA_MON_ACTIVE, /* flag */
TIPC_NLA_MON_BEARER_NAME, /* string */
TIPC_NLA_MON_PEERCNT, /* u32 */
TIPC_NLA_MON_LISTGEN, /* u32 */
__TIPC_NLA_MON_MAX,
TIPC_NLA_MON_MAX = __TIPC_NLA_MON_MAX - 1
@ -194,6 +201,24 @@ enum {
TIPC_NLA_PUBL_MAX = __TIPC_NLA_PUBL_MAX - 1
};
/* Monitor peer info */
enum {
TIPC_NLA_MON_PEER_UNSPEC,
TIPC_NLA_MON_PEER_ADDR, /* u32 */
TIPC_NLA_MON_PEER_DOMGEN, /* u32 */
TIPC_NLA_MON_PEER_APPLIED, /* u32 */
TIPC_NLA_MON_PEER_UPMAP, /* u64 */
TIPC_NLA_MON_PEER_MEMBERS, /* tlv */
TIPC_NLA_MON_PEER_UP, /* flag */
TIPC_NLA_MON_PEER_HEAD, /* flag */
TIPC_NLA_MON_PEER_LOCAL, /* flag */
TIPC_NLA_MON_PEER_PAD, /* flag */
__TIPC_NLA_MON_PEER_MAX,
TIPC_NLA_MON_PEER_MAX = __TIPC_NLA_MON_PEER_MAX - 1
};
/* Nest, connection info */
enum {
TIPC_NLA_CON_UNSPEC,

View File

@ -33,9 +33,11 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <net/genetlink.h>
#include "core.h"
#include "addr.h"
#include "monitor.h"
#include "bearer.h"
#define MAX_MON_DOMAIN 64
#define MON_TIMEOUT 120000
@ -668,3 +670,134 @@ int tipc_nl_monitor_get_threshold(struct net *net)
return tn->mon_threshold;
}
int __tipc_nl_add_monitor_peer(struct tipc_peer *peer, struct tipc_nl_msg *msg)
{
struct tipc_mon_domain *dom = peer->domain;
struct nlattr *attrs;
void *hdr;
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_MON_PEER_GET);
if (!hdr)
return -EMSGSIZE;
attrs = nla_nest_start(msg->skb, TIPC_NLA_MON_PEER);
if (!attrs)
goto msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_MON_PEER_ADDR, peer->addr))
goto attr_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_MON_PEER_APPLIED, peer->applied))
goto attr_msg_full;
if (peer->is_up)
if (nla_put_flag(msg->skb, TIPC_NLA_MON_PEER_UP))
goto attr_msg_full;
if (peer->is_local)
if (nla_put_flag(msg->skb, TIPC_NLA_MON_PEER_LOCAL))
goto attr_msg_full;
if (peer->is_head)
if (nla_put_flag(msg->skb, TIPC_NLA_MON_PEER_HEAD))
goto attr_msg_full;
if (dom) {
if (nla_put_u32(msg->skb, TIPC_NLA_MON_PEER_DOMGEN, dom->gen))
goto attr_msg_full;
if (nla_put_u64_64bit(msg->skb, TIPC_NLA_MON_PEER_UPMAP,
dom->up_map, TIPC_NLA_MON_PEER_PAD))
goto attr_msg_full;
if (nla_put(msg->skb, TIPC_NLA_MON_PEER_MEMBERS,
dom->member_cnt * sizeof(u32), &dom->members))
goto attr_msg_full;
}
nla_nest_end(msg->skb, attrs);
genlmsg_end(msg->skb, hdr);
return 0;
attr_msg_full:
nla_nest_cancel(msg->skb, attrs);
msg_full:
genlmsg_cancel(msg->skb, hdr);
return -EMSGSIZE;
}
int tipc_nl_add_monitor_peer(struct net *net, struct tipc_nl_msg *msg,
u32 bearer_id, u32 *prev_node)
{
struct tipc_monitor *mon = tipc_monitor(net, bearer_id);
struct tipc_peer *peer = mon->self;
if (!mon)
return -EINVAL;
read_lock_bh(&mon->lock);
do {
if (*prev_node) {
if (peer->addr == *prev_node)
*prev_node = 0;
else
continue;
}
if (__tipc_nl_add_monitor_peer(peer, msg)) {
*prev_node = peer->addr;
read_unlock_bh(&mon->lock);
return -EMSGSIZE;
}
} while ((peer = peer_nxt(peer)) != mon->self);
read_unlock_bh(&mon->lock);
return 0;
}
int __tipc_nl_add_monitor(struct net *net, struct tipc_nl_msg *msg,
u32 bearer_id)
{
struct tipc_monitor *mon = tipc_monitor(net, bearer_id);
char bearer_name[TIPC_MAX_BEARER_NAME];
struct nlattr *attrs;
void *hdr;
int ret;
ret = tipc_bearer_get_name(net, bearer_name, bearer_id);
if (ret || !mon)
return -EINVAL;
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_MON_GET);
if (!hdr)
return -EMSGSIZE;
attrs = nla_nest_start(msg->skb, TIPC_NLA_MON);
if (!attrs)
goto msg_full;
read_lock_bh(&mon->lock);
if (nla_put_u32(msg->skb, TIPC_NLA_MON_REF, bearer_id))
goto attr_msg_full;
if (tipc_mon_is_active(net, mon))
if (nla_put_flag(msg->skb, TIPC_NLA_MON_ACTIVE))
goto attr_msg_full;
if (nla_put_string(msg->skb, TIPC_NLA_MON_BEARER_NAME, bearer_name))
goto attr_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_MON_PEERCNT, mon->peer_cnt))
goto attr_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_MON_LISTGEN, mon->list_gen))
goto attr_msg_full;
read_unlock_bh(&mon->lock);
nla_nest_end(msg->skb, attrs);
genlmsg_end(msg->skb, hdr);
return 0;
attr_msg_full:
nla_nest_cancel(msg->skb, attrs);
msg_full:
genlmsg_cancel(msg->skb, hdr);
read_unlock_bh(&mon->lock);
return -EMSGSIZE;
}

View File

@ -36,6 +36,8 @@
#ifndef _TIPC_MONITOR_H
#define _TIPC_MONITOR_H
#include "netlink.h"
/* struct tipc_mon_state: link instance's cache of monitor list and domain state
* @list_gen: current generation of this node's monitor list
* @gen: current generation of this node's local domain
@ -71,6 +73,10 @@ void tipc_mon_remove_peer(struct net *net, u32 addr, int bearer_id);
int tipc_nl_monitor_set_threshold(struct net *net, u32 cluster_size);
int tipc_nl_monitor_get_threshold(struct net *net);
int __tipc_nl_add_monitor(struct net *net, struct tipc_nl_msg *msg,
u32 bearer_id);
int tipc_nl_add_monitor_peer(struct net *net, struct tipc_nl_msg *msg,
u32 bearer_id, u32 *prev_node);
extern const int tipc_max_domain_size;
#endif

View File

@ -64,6 +64,7 @@ tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
[TIPC_NLA_MON_UNSPEC] = { .type = NLA_UNSPEC },
[TIPC_NLA_MON_REF] = { .type = NLA_U32 },
[TIPC_NLA_MON_ACTIVATION_THRESHOLD] = { .type = NLA_U32 },
};
@ -229,6 +230,12 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
{
.cmd = TIPC_NL_MON_GET,
.doit = tipc_nl_node_get_monitor,
.dumpit = tipc_nl_node_dump_monitor,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_MON_PEER_GET,
.dumpit = tipc_nl_node_dump_monitor_peer,
.policy = tipc_nl_policy,
},
};

View File

@ -2007,3 +2007,89 @@ int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info)
return genlmsg_reply(msg.skb, info);
}
int tipc_nl_node_dump_monitor(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
u32 prev_bearer = cb->args[0];
struct tipc_nl_msg msg;
int err;
int i;
if (prev_bearer == MAX_BEARERS)
return 0;
msg.skb = skb;
msg.portid = NETLINK_CB(cb->skb).portid;
msg.seq = cb->nlh->nlmsg_seq;
rtnl_lock();
for (i = prev_bearer; i < MAX_BEARERS; i++) {
prev_bearer = i;
err = __tipc_nl_add_monitor(net, &msg, prev_bearer);
if (err)
goto out;
}
out:
rtnl_unlock();
cb->args[0] = prev_bearer;
return skb->len;
}
int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
u32 prev_node = cb->args[1];
u32 bearer_id = cb->args[2];
int done = cb->args[0];
struct tipc_nl_msg msg;
int err;
if (!prev_node) {
struct nlattr **attrs;
struct nlattr *mon[TIPC_NLA_MON_MAX + 1];
err = tipc_nlmsg_parse(cb->nlh, &attrs);
if (err)
return err;
if (!attrs[TIPC_NLA_MON])
return -EINVAL;
err = nla_parse_nested(mon, TIPC_NLA_MON_MAX,
attrs[TIPC_NLA_MON],
tipc_nl_monitor_policy);
if (err)
return err;
if (!mon[TIPC_NLA_MON_REF])
return -EINVAL;
bearer_id = nla_get_u32(mon[TIPC_NLA_MON_REF]);
if (bearer_id >= MAX_BEARERS)
return -EINVAL;
}
if (done)
return 0;
msg.skb = skb;
msg.portid = NETLINK_CB(cb->skb).portid;
msg.seq = cb->nlh->nlmsg_seq;
rtnl_lock();
err = tipc_nl_add_monitor_peer(net, &msg, bearer_id, &prev_node);
if (!err)
done = 1;
rtnl_unlock();
cb->args[0] = done;
cb->args[1] = prev_node;
cb->args[2] = bearer_id;
return skb->len;
}

View File

@ -80,4 +80,7 @@ int tipc_nl_node_set_link(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_set_monitor(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_dump_monitor(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
struct netlink_callback *cb);
#endif