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bridge: cfm: Netlink GET status Interface.

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This is the implementation of CFM netlink status
get information interface.

Add new nested netlink attributes. These attributes are used by the
user space to get status information.

GETLINK:
    Request filter RTEXT_FILTER_CFM_STATUS:
    Indicating that CFM status information must be delivered.

    IFLA_BRIDGE_CFM:
        Points to the CFM information.

    IFLA_BRIDGE_CFM_MEP_STATUS_INFO:
        This indicate that the MEP instance status are following.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO:
        This indicate that the peer MEP status are following.

CFM nested attribute has the following attributes in next level.

GETLINK RTEXT_FILTER_CFM_STATUS:
    IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE:
        The MEP instance number of the delivered status.
        The type is u32.
    IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN:
        The MEP instance received CFM PDU with unexpected Opcode.
        The type is u32 (bool).
    IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN:
        The MEP instance received CFM PDU with unexpected version.
        The type is u32 (bool).
    IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN:
        The MEP instance received CCM PDU with MD level lower than
        configured level. This frame is discarded.
        The type is u32 (bool).

    IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE:
        The MEP instance number of the delivered status.
        The type is u32.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID:
        The added Peer MEP ID of the delivered status.
        The type is u32.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT:
        The CCM defect status.
        The type is u32 (bool).
        True means no CCM frame is received for 3.25 intervals.
        IFLA_BRIDGE_CFM_CC_CONFIG_EXP_INTERVAL.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI:
        The last received CCM PDU RDI.
        The type is u32 (bool).
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE:
        The last received CCM PDU Port Status TLV value field.
        The type is u8.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE:
        The last received CCM PDU Interface Status TLV value field.
        The type is u8.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN:
        A CCM frame has been received from Peer MEP.
        The type is u32 (bool).
        This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN:
        A CCM frame with TLV has been received from Peer MEP.
        The type is u32 (bool).
        This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.
    IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN:
        A CCM frame with unexpected sequence number has been received
        from Peer MEP.
        The type is u32 (bool).
        When a sequence number is not one higher than previously received
        then it is unexpected.
        This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.

Signed-off-by: Henrik Bjoernlund  <henrik.bjoernlund@microchip.com>
Reviewed-by: Horatiu Vultur  <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Henrik Bjoernlund 2020-10-27 10:02:50 +00:00 committed by Jakub Kicinski
parent 5e312fc0e7
commit e77824d81d
5 changed files with 154 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
include/uapi/linux/if_bridge.h
View File

@ -345,6 +345,8 @@ enum {
IFLA_BRIDGE_CFM_CC_RDI_INFO,
IFLA_BRIDGE_CFM_CC_CCM_TX_INFO,
IFLA_BRIDGE_CFM_CC_PEER_MEP_INFO,
IFLA_BRIDGE_CFM_MEP_STATUS_INFO,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO,
__IFLA_BRIDGE_CFM_MAX,
};
@ -424,6 +426,33 @@ enum {
#define IFLA_BRIDGE_CFM_CC_CCM_TX_MAX (__IFLA_BRIDGE_CFM_CC_CCM_TX_MAX - 1)
enum {
IFLA_BRIDGE_CFM_MEP_STATUS_UNSPEC,
IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE,
IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN,
IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN,
IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN,
__IFLA_BRIDGE_CFM_MEP_STATUS_MAX,
};
#define IFLA_BRIDGE_CFM_MEP_STATUS_MAX (__IFLA_BRIDGE_CFM_MEP_STATUS_MAX - 1)
enum {
IFLA_BRIDGE_CFM_CC_PEER_STATUS_UNSPEC,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN,
__IFLA_BRIDGE_CFM_CC_PEER_STATUS_MAX,
};
#define IFLA_BRIDGE_CFM_CC_PEER_STATUS_MAX (__IFLA_BRIDGE_CFM_CC_PEER_STATUS_MAX - 1)
struct bridge_stp_xstats {
__u64 transition_blk;
__u64 transition_fwd;

1
include/uapi/linux/rtnetlink.h
View File

@ -780,6 +780,7 @@ enum {
#define RTEXT_FILTER_SKIP_STATS (1 << 3)
#define RTEXT_FILTER_MRP (1 << 4)
#define RTEXT_FILTER_CFM_CONFIG (1 << 5)
#define RTEXT_FILTER_CFM_STATUS (1 << 6)
/* End of information exported to user level */

105
net/bridge/br_cfm_netlink.c
View File

@ -612,3 +612,108 @@ nla_put_failure:
nla_info_failure:
return -EMSGSIZE;
}
int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br)
{
struct br_cfm_peer_mep *peer_mep;
struct br_cfm_mep *mep;
struct nlattr *tb;
hlist_for_each_entry_rcu(mep, &br->mep_list, head) {
tb = nla_nest_start(skb, IFLA_BRIDGE_CFM_MEP_STATUS_INFO);
if (!tb)
goto nla_info_failure;
if (nla_put_u32(skb, IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE,
mep->instance))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN,
mep->status.opcode_unexp_seen))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN,
mep->status.version_unexp_seen))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN,
mep->status.rx_level_low_seen))
goto nla_put_failure;
/* Clear all 'seen' indications */
mep->status.opcode_unexp_seen = false;
mep->status.version_unexp_seen = false;
mep->status.rx_level_low_seen = false;
nla_nest_end(skb, tb);
hlist_for_each_entry_rcu(peer_mep, &mep->peer_mep_list, head) {
tb = nla_nest_start(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO);
if (!tb)
goto nla_info_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE,
mep->instance))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID,
peer_mep->mepid))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT,
peer_mep->cc_status.ccm_defect))
goto nla_put_failure;
if (nla_put_u32(skb, IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI,
peer_mep->cc_status.rdi))
goto nla_put_failure;
if (nla_put_u8(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE,
peer_mep->cc_status.port_tlv_value))
goto nla_put_failure;
if (nla_put_u8(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE,
peer_mep->cc_status.if_tlv_value))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN,
peer_mep->cc_status.seen))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN,
peer_mep->cc_status.tlv_seen))
goto nla_put_failure;
if (nla_put_u32(skb,
IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN,
peer_mep->cc_status.seq_unexp_seen))
goto nla_put_failure;
/* Clear all 'seen' indications */
peer_mep->cc_status.seen = false;
peer_mep->cc_status.tlv_seen = false;
peer_mep->cc_status.seq_unexp_seen = false;
nla_nest_end(skb, tb);
}
}
return 0;
nla_put_failure:
nla_nest_cancel(skb, tb);
nla_info_failure:
return -EMSGSIZE;
}

16
net/bridge/br_netlink.c
View File

@ -428,7 +428,8 @@ static int br_fill_ifinfo(struct sk_buff *skb,
if (filter_mask & (RTEXT_FILTER_BRVLAN |
RTEXT_FILTER_BRVLAN_COMPRESSED |
RTEXT_FILTER_MRP |
RTEXT_FILTER_CFM_CONFIG)) {
RTEXT_FILTER_CFM_CONFIG |
RTEXT_FILTER_CFM_STATUS)) {
af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
if (!af)
goto nla_put_failure;
@ -477,7 +478,7 @@ static int br_fill_ifinfo(struct sk_buff *skb,
goto nla_put_failure;
}
if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
struct nlattr *cfm_nest = NULL;
int err;
@ -496,6 +497,14 @@ static int br_fill_ifinfo(struct sk_buff *skb,
goto nla_put_failure;
}
if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
rcu_read_lock();
err = br_cfm_status_fill_info(skb, br);
rcu_read_unlock();
if (err)
goto nla_put_failure;
}
nla_nest_end(skb, cfm_nest);
}
@ -563,7 +572,8 @@ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
!(filter_mask & RTEXT_FILTER_MRP) &&
!(filter_mask & RTEXT_FILTER_CFM_CONFIG))
!(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
!(filter_mask & RTEXT_FILTER_CFM_STATUS))
return 0;
return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,

6
net/bridge/br_private.h
View File

@ -1466,6 +1466,7 @@ int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
bool br_cfm_created(struct net_bridge *br);
void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br);
#else
static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
struct nlattr *attr, int cmd,
@ -1488,6 +1489,11 @@ static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge
{
return -EOPNOTSUPP;
}
static inline int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br)
{
return -EOPNOTSUPP;
}
#endif
/* br_netlink.c */