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Date: Tue, 6 Oct 2020 14:44:31 +0000
From: Nikolay Aleksandrov <nikolay@...dia.com>
To: "bridge@...ts.linux-foundation.org"
<bridge@...ts.linux-foundation.org>,
"henrik.bjoernlund@...rochip.com" <henrik.bjoernlund@...rochip.com>,
"davem@...emloft.net" <davem@...emloft.net>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"jiri@...lanox.com" <jiri@...lanox.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Roopa Prabhu <roopa@...dia.com>,
"idosch@...lanox.com" <idosch@...lanox.com>,
"kuba@...nel.org" <kuba@...nel.org>,
"UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>
CC: "horatiu.vultur@...rochip.com" <horatiu.vultur@...rochip.com>
Subject: Re: [net-next v2 07/11] bridge: cfm: Netlink Interface.
On Thu, 2020-10-01 at 10:30 +0000, Henrik Bjoernlund wrote:
> This is the implementation of CFM netlink configuration
> and status information interface.
>
> Add new nested netlink attributes. These attributes are used by the
> user space to create/delete/configure CFM instances and get status.
> Also they are used by the kernel to notify the user space when changes
> in any status happens.
>
> SETLINK:
> IFLA_BRIDGE_CFM:
> Indicate that the following attributes are CFM.
>
> IFLA_BRIDGE_CFM_MEP_CREATE:
> This indicate that a MEP instance must be created.
> IFLA_BRIDGE_CFM_MEP_DELETE:
> This indicate that a MEP instance must be deleted.
> IFLA_BRIDGE_CFM_MEP_CONFIG:
> This indicate that a MEP instance must be configured.
> IFLA_BRIDGE_CFM_CC_CONFIG:
> This indicate that a MEP instance Continuity Check (CC)
> functionality must be configured.
> IFLA_BRIDGE_CFM_CC_PEER_MEP_ADD:
> This indicate that a CC Peer MEP must be added.
> IFLA_BRIDGE_CFM_CC_PEER_MEP_REMOVE:
> This indicate that a CC Peer MEP must be removed.
> IFLA_BRIDGE_CFM_CC_CCM_TX:
> This indicate that the CC transmitted CCM PDU must be configured.
> IFLA_BRIDGE_CFM_CC_RDI:
> This indicate that the CC transmitted CCM PDU RDI must be
> configured.
>
> GETLINK:
> Request filter RTEXT_FILTER_CFM_CONFIG:
> Indicating that CFM configuration information must be delivered.
>
> IFLA_BRIDGE_CFM:
> Points to the CFM information.
>
> IFLA_BRIDGE_CFM_MEP_CREATE_INFO:
> This indicate that MEP instance create parameters are following.
> IFLA_BRIDGE_CFM_MEP_CONFIG_INFO:
> This indicate that MEP instance config parameters are following.
> IFLA_BRIDGE_CFM_CC_CONFIG_INFO:
> This indicate that MEP instance CC functionality
> parameters are following.
> IFLA_BRIDGE_CFM_CC_RDI_INFO:
> This indicate that CC transmitted CCM PDU RDI
> parameters are following.
> IFLA_BRIDGE_CFM_CC_CCM_TX_INFO:
> This indicate that CC transmitted CCM PDU parameters are
> following.
> IFLA_BRIDGE_CFM_CC_PEER_MEP_INFO:
> This indicate that the added peer MEP IDs are following.
>
> 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.
>
> SETLINK and GETLINK RTEXT_FILTER_CFM_CONFIG:
> IFLA_BRIDGE_CFM_MEP_CREATE_INSTANCE:
> The created MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_MEP_CREATE_DOMAIN:
> The created MEP domain.
> The type is u32 (br_cfm_domain).
> It must be BR_CFM_PORT.
> This means that CFM frames are transmitted and received
> directly on the port - untagged. Not in a VLAN.
> IFLA_BRIDGE_CFM_MEP_CREATE_DIRECTION:
> The created MEP direction.
> The type is u32 (br_cfm_mep_direction).
> It must be BR_CFM_MEP_DIRECTION_DOWN.
> This means that CFM frames are transmitted and received on
> the port. Not in the bridge.
> IFLA_BRIDGE_CFM_MEP_CREATE_IFINDEX:
> The created MEP residence port ifindex.
> The type is u32 (ifindex).
>
> IFLA_BRIDGE_CFM_MEP_DELETE_INSTANCE:
> The deleted MEP instance number.
> The type is u32.
>
> IFLA_BRIDGE_CFM_MEP_CONFIG_INSTANCE:
> The configured MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_MEP_CONFIG_UNICAST_MAC:
> The configured MEP unicast MAC address.
> The type is 6*u8 (array).
> This is used as SMAC in all transmitted CFM frames.
> IFLA_BRIDGE_CFM_MEP_CONFIG_MDLEVEL:
> The configured MEP unicast MD level.
> The type is u32.
> It must be in the range 1-7.
> No CFM frames are passing through this MEP on lower levels.
> IFLA_BRIDGE_CFM_MEP_CONFIG_MEPID:
> The configured MEP ID.
> The type is u32.
> It must be in the range 0-0x1FFF.
> This MEP ID is inserted in any transmitted CCM frame.
>
> IFLA_BRIDGE_CFM_CC_CONFIG_INSTANCE:
> The configured MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_CONFIG_ENABLE:
> The Continuity Check (CC) functionality is enabled or disabled.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_CC_CONFIG_EXP_INTERVAL:
> The CC expected receive interval of CCM frames.
> The type is u32 (br_cfm_ccm_interval).
> This is also the transmission interval of CCM frames when enabled.
> IFLA_BRIDGE_CFM_CC_CONFIG_EXP_MAID:
> The CC expected receive MAID in CCM frames.
> The type is CFM_MAID_LENGTH*u8.
> This is MAID is also inserted in transmitted CCM frames.
>
> IFLA_BRIDGE_CFM_CC_PEER_MEP_INSTANCE:
> The configured MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_PEER_MEPID:
> The CC Peer MEP ID added.
> The type is u32.
> When a Peer MEP ID is added and CC is enabled it is expected to
> receive CCM frames from that Peer MEP.
>
> IFLA_BRIDGE_CFM_CC_RDI_INSTANCE:
> The configured MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_RDI_RDI:
> The RDI that is inserted in transmitted CCM PDU.
> The type is u32 (bool).
>
> IFLA_BRIDGE_CFM_CC_CCM_TX_INSTANCE:
> The configured MEP instance number.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_CCM_TX_DMAC:
> The transmitted CCM frame destination MAC address.
> The type is 6*u8 (array).
> This is used as DMAC in all transmitted CFM frames.
> IFLA_BRIDGE_CFM_CC_CCM_TX_SEQ_NO_UPDATE:
> The transmitted CCM frame update (increment) of sequence
> number is enabled or disabled.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_CC_CCM_TX_PERIOD:
> The period of time where CCM frame are transmitted.
> The type is u32.
> The time is given in seconds. SETLINK IFLA_BRIDGE_CFM_CC_CCM_TX
> must be done before timeout to keep transmission alive.
> When period is zero any ongoing CCM frame transmission
> will be stopped.
> IFLA_BRIDGE_CFM_CC_CCM_TX_IF_TLV:
> The transmitted CCM frame update with Interface Status TLV
> is enabled or disabled.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_CC_CCM_TX_IF_TLV_VALUE:
> The transmitted Interface Status TLV value field.
> The type is u8.
> IFLA_BRIDGE_CFM_CC_CCM_TX_PORT_TLV:
> The transmitted CCM frame update with Port Status TLV is enabled
> or disabled.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_CC_CCM_TX_PORT_TLV_VALUE:
> The transmitted Port Status TLV value field.
> The type is u8.
>
> 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.
>
> Reviewed-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> Signed-off-by: Henrik Bjoernlund <henrik.bjoernlund@...rochip.com>
> ---
> include/uapi/linux/if_bridge.h | 125 ++++++
> include/uapi/linux/rtnetlink.h | 2 +
> net/bridge/Makefile | 2 +-
> net/bridge/br_cfm.c | 5 +
> net/bridge/br_cfm_netlink.c | 724 +++++++++++++++++++++++++++++++++
> net/bridge/br_netlink.c | 67 ++-
> net/bridge/br_private.h | 31 ++
> 7 files changed, 940 insertions(+), 16 deletions(-)
> create mode 100644 net/bridge/br_cfm_netlink.c
>
Hi Henrik,
This patch definitely can be broken into a few smaller ones that add support for
configuring/dumping different cfm parts.
Also, and more importantly, the IFLA_AF_SPEC fix must go to -net as a separate
patch since the problem is there even now. After it gets accepted and -net is
merged into net-next you can rebase on top of it.
Thanks,
Nik
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