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![gushengxian](/assets/img/avatar_default.png)
Return statements are not needed in Void function. Signed-off-by: gushengxian <gushengxian@yulong.com> Signed-off-by: David S. Miller <davem@davemloft.net>
867 lines
20 KiB
C
867 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/cfm_bridge.h>
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#include <uapi/linux/cfm_bridge.h>
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#include "br_private_cfm.h"
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static struct br_cfm_mep *br_mep_find(struct net_bridge *br, u32 instance)
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{
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struct br_cfm_mep *mep;
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hlist_for_each_entry(mep, &br->mep_list, head)
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if (mep->instance == instance)
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return mep;
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return NULL;
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}
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static struct br_cfm_mep *br_mep_find_ifindex(struct net_bridge *br,
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u32 ifindex)
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{
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struct br_cfm_mep *mep;
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hlist_for_each_entry_rcu(mep, &br->mep_list, head,
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lockdep_rtnl_is_held())
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if (mep->create.ifindex == ifindex)
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return mep;
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return NULL;
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}
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static struct br_cfm_peer_mep *br_peer_mep_find(struct br_cfm_mep *mep,
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u32 mepid)
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{
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struct br_cfm_peer_mep *peer_mep;
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hlist_for_each_entry_rcu(peer_mep, &mep->peer_mep_list, head,
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lockdep_rtnl_is_held())
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if (peer_mep->mepid == mepid)
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return peer_mep;
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return NULL;
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}
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static struct net_bridge_port *br_mep_get_port(struct net_bridge *br,
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u32 ifindex)
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{
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struct net_bridge_port *port;
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list_for_each_entry(port, &br->port_list, list)
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if (port->dev->ifindex == ifindex)
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return port;
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return NULL;
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}
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/* Calculate the CCM interval in us. */
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static u32 interval_to_us(enum br_cfm_ccm_interval interval)
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{
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switch (interval) {
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case BR_CFM_CCM_INTERVAL_NONE:
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return 0;
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case BR_CFM_CCM_INTERVAL_3_3_MS:
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return 3300;
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case BR_CFM_CCM_INTERVAL_10_MS:
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return 10 * 1000;
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case BR_CFM_CCM_INTERVAL_100_MS:
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return 100 * 1000;
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case BR_CFM_CCM_INTERVAL_1_SEC:
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return 1000 * 1000;
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case BR_CFM_CCM_INTERVAL_10_SEC:
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return 10 * 1000 * 1000;
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case BR_CFM_CCM_INTERVAL_1_MIN:
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return 60 * 1000 * 1000;
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case BR_CFM_CCM_INTERVAL_10_MIN:
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return 10 * 60 * 1000 * 1000;
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}
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return 0;
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}
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/* Convert the interface interval to CCM PDU value. */
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static u32 interval_to_pdu(enum br_cfm_ccm_interval interval)
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{
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switch (interval) {
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case BR_CFM_CCM_INTERVAL_NONE:
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return 0;
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case BR_CFM_CCM_INTERVAL_3_3_MS:
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return 1;
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case BR_CFM_CCM_INTERVAL_10_MS:
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return 2;
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case BR_CFM_CCM_INTERVAL_100_MS:
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return 3;
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case BR_CFM_CCM_INTERVAL_1_SEC:
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return 4;
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case BR_CFM_CCM_INTERVAL_10_SEC:
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return 5;
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case BR_CFM_CCM_INTERVAL_1_MIN:
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return 6;
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case BR_CFM_CCM_INTERVAL_10_MIN:
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return 7;
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}
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return 0;
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}
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/* Convert the CCM PDU value to interval on interface. */
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static u32 pdu_to_interval(u32 value)
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{
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switch (value) {
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case 0:
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return BR_CFM_CCM_INTERVAL_NONE;
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case 1:
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return BR_CFM_CCM_INTERVAL_3_3_MS;
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case 2:
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return BR_CFM_CCM_INTERVAL_10_MS;
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case 3:
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return BR_CFM_CCM_INTERVAL_100_MS;
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case 4:
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return BR_CFM_CCM_INTERVAL_1_SEC;
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case 5:
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return BR_CFM_CCM_INTERVAL_10_SEC;
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case 6:
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return BR_CFM_CCM_INTERVAL_1_MIN;
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case 7:
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return BR_CFM_CCM_INTERVAL_10_MIN;
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}
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return BR_CFM_CCM_INTERVAL_NONE;
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}
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static void ccm_rx_timer_start(struct br_cfm_peer_mep *peer_mep)
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{
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u32 interval_us;
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interval_us = interval_to_us(peer_mep->mep->cc_config.exp_interval);
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/* Function ccm_rx_dwork must be called with 1/4
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* of the configured CC 'expected_interval'
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* in order to detect CCM defect after 3.25 interval.
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*/
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queue_delayed_work(system_wq, &peer_mep->ccm_rx_dwork,
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usecs_to_jiffies(interval_us / 4));
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}
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static void br_cfm_notify(int event, const struct net_bridge_port *port)
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{
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u32 filter = RTEXT_FILTER_CFM_STATUS;
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br_info_notify(event, port->br, NULL, filter);
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}
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static void cc_peer_enable(struct br_cfm_peer_mep *peer_mep)
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{
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memset(&peer_mep->cc_status, 0, sizeof(peer_mep->cc_status));
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peer_mep->ccm_rx_count_miss = 0;
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ccm_rx_timer_start(peer_mep);
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}
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static void cc_peer_disable(struct br_cfm_peer_mep *peer_mep)
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{
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cancel_delayed_work_sync(&peer_mep->ccm_rx_dwork);
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}
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static struct sk_buff *ccm_frame_build(struct br_cfm_mep *mep,
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const struct br_cfm_cc_ccm_tx_info *const tx_info)
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{
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struct br_cfm_common_hdr *common_hdr;
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struct net_bridge_port *b_port;
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struct br_cfm_maid *maid;
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u8 *itu_reserved, *e_tlv;
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struct ethhdr *eth_hdr;
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struct sk_buff *skb;
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__be32 *status_tlv;
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__be32 *snumber;
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__be16 *mepid;
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skb = dev_alloc_skb(CFM_CCM_MAX_FRAME_LENGTH);
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if (!skb)
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return NULL;
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rcu_read_lock();
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b_port = rcu_dereference(mep->b_port);
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if (!b_port) {
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kfree_skb(skb);
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rcu_read_unlock();
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return NULL;
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}
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skb->dev = b_port->dev;
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rcu_read_unlock();
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/* The device cannot be deleted until the work_queue functions has
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* completed. This function is called from ccm_tx_work_expired()
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* that is a work_queue functions.
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*/
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skb->protocol = htons(ETH_P_CFM);
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skb->priority = CFM_FRAME_PRIO;
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/* Ethernet header */
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eth_hdr = skb_put(skb, sizeof(*eth_hdr));
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ether_addr_copy(eth_hdr->h_dest, tx_info->dmac.addr);
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ether_addr_copy(eth_hdr->h_source, mep->config.unicast_mac.addr);
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eth_hdr->h_proto = htons(ETH_P_CFM);
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/* Common CFM Header */
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common_hdr = skb_put(skb, sizeof(*common_hdr));
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common_hdr->mdlevel_version = mep->config.mdlevel << 5;
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common_hdr->opcode = BR_CFM_OPCODE_CCM;
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common_hdr->flags = (mep->rdi << 7) |
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interval_to_pdu(mep->cc_config.exp_interval);
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common_hdr->tlv_offset = CFM_CCM_TLV_OFFSET;
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/* Sequence number */
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snumber = skb_put(skb, sizeof(*snumber));
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if (tx_info->seq_no_update) {
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*snumber = cpu_to_be32(mep->ccm_tx_snumber);
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mep->ccm_tx_snumber += 1;
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} else {
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*snumber = 0;
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}
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mepid = skb_put(skb, sizeof(*mepid));
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*mepid = cpu_to_be16((u16)mep->config.mepid);
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maid = skb_put(skb, sizeof(*maid));
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memcpy(maid->data, mep->cc_config.exp_maid.data, sizeof(maid->data));
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/* ITU reserved (CFM_CCM_ITU_RESERVED_SIZE octets) */
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itu_reserved = skb_put(skb, CFM_CCM_ITU_RESERVED_SIZE);
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memset(itu_reserved, 0, CFM_CCM_ITU_RESERVED_SIZE);
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/* Generel CFM TLV format:
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* TLV type: one byte
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* TLV value length: two bytes
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* TLV value: 'TLV value length' bytes
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*/
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/* Port status TLV. The value length is 1. Total of 4 bytes. */
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if (tx_info->port_tlv) {
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status_tlv = skb_put(skb, sizeof(*status_tlv));
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*status_tlv = cpu_to_be32((CFM_PORT_STATUS_TLV_TYPE << 24) |
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(1 << 8) | /* Value length */
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(tx_info->port_tlv_value & 0xFF));
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}
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/* Interface status TLV. The value length is 1. Total of 4 bytes. */
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if (tx_info->if_tlv) {
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status_tlv = skb_put(skb, sizeof(*status_tlv));
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*status_tlv = cpu_to_be32((CFM_IF_STATUS_TLV_TYPE << 24) |
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(1 << 8) | /* Value length */
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(tx_info->if_tlv_value & 0xFF));
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}
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/* End TLV */
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e_tlv = skb_put(skb, sizeof(*e_tlv));
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*e_tlv = CFM_ENDE_TLV_TYPE;
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return skb;
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}
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static void ccm_frame_tx(struct sk_buff *skb)
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{
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skb_reset_network_header(skb);
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dev_queue_xmit(skb);
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}
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/* This function is called with the configured CC 'expected_interval'
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* in order to drive CCM transmission when enabled.
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*/
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static void ccm_tx_work_expired(struct work_struct *work)
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{
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struct delayed_work *del_work;
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struct br_cfm_mep *mep;
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struct sk_buff *skb;
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u32 interval_us;
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del_work = to_delayed_work(work);
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mep = container_of(del_work, struct br_cfm_mep, ccm_tx_dwork);
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if (time_before_eq(mep->ccm_tx_end, jiffies)) {
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/* Transmission period has ended */
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mep->cc_ccm_tx_info.period = 0;
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return;
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}
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skb = ccm_frame_build(mep, &mep->cc_ccm_tx_info);
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if (skb)
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ccm_frame_tx(skb);
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interval_us = interval_to_us(mep->cc_config.exp_interval);
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queue_delayed_work(system_wq, &mep->ccm_tx_dwork,
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usecs_to_jiffies(interval_us));
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}
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/* This function is called with 1/4 of the configured CC 'expected_interval'
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* in order to detect CCM defect after 3.25 interval.
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*/
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static void ccm_rx_work_expired(struct work_struct *work)
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{
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struct br_cfm_peer_mep *peer_mep;
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struct net_bridge_port *b_port;
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struct delayed_work *del_work;
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del_work = to_delayed_work(work);
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peer_mep = container_of(del_work, struct br_cfm_peer_mep, ccm_rx_dwork);
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/* After 13 counts (4 * 3,25) then 3.25 intervals are expired */
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if (peer_mep->ccm_rx_count_miss < 13) {
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/* 3.25 intervals are NOT expired without CCM reception */
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peer_mep->ccm_rx_count_miss++;
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/* Start timer again */
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ccm_rx_timer_start(peer_mep);
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} else {
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/* 3.25 intervals are expired without CCM reception.
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* CCM defect detected
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*/
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peer_mep->cc_status.ccm_defect = true;
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/* Change in CCM defect status - notify */
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rcu_read_lock();
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b_port = rcu_dereference(peer_mep->mep->b_port);
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if (b_port)
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br_cfm_notify(RTM_NEWLINK, b_port);
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rcu_read_unlock();
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}
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}
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static u32 ccm_tlv_extract(struct sk_buff *skb, u32 index,
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struct br_cfm_peer_mep *peer_mep)
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{
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__be32 *s_tlv;
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__be32 _s_tlv;
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u32 h_s_tlv;
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u8 *e_tlv;
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u8 _e_tlv;
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e_tlv = skb_header_pointer(skb, index, sizeof(_e_tlv), &_e_tlv);
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if (!e_tlv)
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return 0;
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/* TLV is present - get the status TLV */
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s_tlv = skb_header_pointer(skb,
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index,
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sizeof(_s_tlv), &_s_tlv);
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if (!s_tlv)
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return 0;
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h_s_tlv = ntohl(*s_tlv);
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if ((h_s_tlv >> 24) == CFM_IF_STATUS_TLV_TYPE) {
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/* Interface status TLV */
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peer_mep->cc_status.tlv_seen = true;
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peer_mep->cc_status.if_tlv_value = (h_s_tlv & 0xFF);
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}
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if ((h_s_tlv >> 24) == CFM_PORT_STATUS_TLV_TYPE) {
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/* Port status TLV */
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peer_mep->cc_status.tlv_seen = true;
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peer_mep->cc_status.port_tlv_value = (h_s_tlv & 0xFF);
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}
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/* The Sender ID TLV is not handled */
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/* The Organization-Specific TLV is not handled */
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/* Return the length of this tlv.
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* This is the length of the value field plus 3 bytes for size of type
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* field and length field
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*/
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return ((h_s_tlv >> 8) & 0xFFFF) + 3;
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}
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/* note: already called with rcu_read_lock */
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static int br_cfm_frame_rx(struct net_bridge_port *port, struct sk_buff *skb)
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{
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u32 mdlevel, interval, size, index, max;
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const struct br_cfm_common_hdr *hdr;
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struct br_cfm_peer_mep *peer_mep;
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const struct br_cfm_maid *maid;
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struct br_cfm_common_hdr _hdr;
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struct br_cfm_maid _maid;
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struct br_cfm_mep *mep;
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struct net_bridge *br;
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__be32 *snumber;
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__be32 _snumber;
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__be16 *mepid;
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__be16 _mepid;
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if (port->state == BR_STATE_DISABLED)
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return 0;
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hdr = skb_header_pointer(skb, 0, sizeof(_hdr), &_hdr);
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if (!hdr)
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return 1;
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br = port->br;
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mep = br_mep_find_ifindex(br, port->dev->ifindex);
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if (unlikely(!mep))
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/* No MEP on this port - must be forwarded */
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return 0;
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mdlevel = hdr->mdlevel_version >> 5;
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if (mdlevel > mep->config.mdlevel)
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/* The level is above this MEP level - must be forwarded */
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return 0;
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if ((hdr->mdlevel_version & 0x1F) != 0) {
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/* Invalid version */
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mep->status.version_unexp_seen = true;
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return 1;
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}
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if (mdlevel < mep->config.mdlevel) {
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/* The level is below this MEP level */
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mep->status.rx_level_low_seen = true;
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return 1;
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}
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if (hdr->opcode == BR_CFM_OPCODE_CCM) {
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/* CCM PDU received. */
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/* MA ID is after common header + sequence number + MEP ID */
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maid = skb_header_pointer(skb,
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CFM_CCM_PDU_MAID_OFFSET,
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sizeof(_maid), &_maid);
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if (!maid)
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return 1;
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if (memcmp(maid->data, mep->cc_config.exp_maid.data,
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sizeof(maid->data)))
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/* MA ID not as expected */
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return 1;
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/* MEP ID is after common header + sequence number */
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mepid = skb_header_pointer(skb,
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CFM_CCM_PDU_MEPID_OFFSET,
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sizeof(_mepid), &_mepid);
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if (!mepid)
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return 1;
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peer_mep = br_peer_mep_find(mep, (u32)ntohs(*mepid));
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if (!peer_mep)
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return 1;
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/* Interval is in common header flags */
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interval = hdr->flags & 0x07;
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if (mep->cc_config.exp_interval != pdu_to_interval(interval))
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/* Interval not as expected */
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return 1;
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/* A valid CCM frame is received */
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if (peer_mep->cc_status.ccm_defect) {
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peer_mep->cc_status.ccm_defect = false;
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/* Change in CCM defect status - notify */
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br_cfm_notify(RTM_NEWLINK, port);
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/* Start CCM RX timer */
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ccm_rx_timer_start(peer_mep);
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}
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peer_mep->cc_status.seen = true;
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peer_mep->ccm_rx_count_miss = 0;
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/* RDI is in common header flags */
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peer_mep->cc_status.rdi = (hdr->flags & 0x80) ? true : false;
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/* Sequence number is after common header */
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snumber = skb_header_pointer(skb,
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CFM_CCM_PDU_SEQNR_OFFSET,
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sizeof(_snumber), &_snumber);
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if (!snumber)
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return 1;
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if (ntohl(*snumber) != (mep->ccm_rx_snumber + 1))
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/* Unexpected sequence number */
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peer_mep->cc_status.seq_unexp_seen = true;
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mep->ccm_rx_snumber = ntohl(*snumber);
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/* TLV end is after common header + sequence number + MEP ID +
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* MA ID + ITU reserved
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*/
|
|
index = CFM_CCM_PDU_TLV_OFFSET;
|
|
max = 0;
|
|
do { /* Handle all TLVs */
|
|
size = ccm_tlv_extract(skb, index, peer_mep);
|
|
index += size;
|
|
max += 1;
|
|
} while (size != 0 && max < 4); /* Max four TLVs possible */
|
|
|
|
return 1;
|
|
}
|
|
|
|
mep->status.opcode_unexp_seen = true;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct br_frame_type cfm_frame_type __read_mostly = {
|
|
.type = cpu_to_be16(ETH_P_CFM),
|
|
.frame_handler = br_cfm_frame_rx,
|
|
};
|
|
|
|
int br_cfm_mep_create(struct net_bridge *br,
|
|
const u32 instance,
|
|
struct br_cfm_mep_create *const create,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_port *p;
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (create->domain == BR_CFM_VLAN) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"VLAN domain not supported");
|
|
return -EINVAL;
|
|
}
|
|
if (create->domain != BR_CFM_PORT) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Invalid domain value");
|
|
return -EINVAL;
|
|
}
|
|
if (create->direction == BR_CFM_MEP_DIRECTION_UP) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Up-MEP not supported");
|
|
return -EINVAL;
|
|
}
|
|
if (create->direction != BR_CFM_MEP_DIRECTION_DOWN) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Invalid direction value");
|
|
return -EINVAL;
|
|
}
|
|
p = br_mep_get_port(br, create->ifindex);
|
|
if (!p) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Port is not related to bridge");
|
|
return -EINVAL;
|
|
}
|
|
mep = br_mep_find(br, instance);
|
|
if (mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance already exists");
|
|
return -EEXIST;
|
|
}
|
|
|
|
/* In PORT domain only one instance can be created per port */
|
|
if (create->domain == BR_CFM_PORT) {
|
|
mep = br_mep_find_ifindex(br, create->ifindex);
|
|
if (mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Only one Port MEP on a port allowed");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
mep = kzalloc(sizeof(*mep), GFP_KERNEL);
|
|
if (!mep)
|
|
return -ENOMEM;
|
|
|
|
mep->create = *create;
|
|
mep->instance = instance;
|
|
rcu_assign_pointer(mep->b_port, p);
|
|
|
|
INIT_HLIST_HEAD(&mep->peer_mep_list);
|
|
INIT_DELAYED_WORK(&mep->ccm_tx_dwork, ccm_tx_work_expired);
|
|
|
|
if (hlist_empty(&br->mep_list))
|
|
br_add_frame(br, &cfm_frame_type);
|
|
|
|
hlist_add_tail_rcu(&mep->head, &br->mep_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mep_delete_implementation(struct net_bridge *br,
|
|
struct br_cfm_mep *mep)
|
|
{
|
|
struct br_cfm_peer_mep *peer_mep;
|
|
struct hlist_node *n_store;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* Empty and free peer MEP list */
|
|
hlist_for_each_entry_safe(peer_mep, n_store, &mep->peer_mep_list, head) {
|
|
cancel_delayed_work_sync(&peer_mep->ccm_rx_dwork);
|
|
hlist_del_rcu(&peer_mep->head);
|
|
kfree_rcu(peer_mep, rcu);
|
|
}
|
|
|
|
cancel_delayed_work_sync(&mep->ccm_tx_dwork);
|
|
|
|
RCU_INIT_POINTER(mep->b_port, NULL);
|
|
hlist_del_rcu(&mep->head);
|
|
kfree_rcu(mep, rcu);
|
|
|
|
if (hlist_empty(&br->mep_list))
|
|
br_del_frame(br, &cfm_frame_type);
|
|
}
|
|
|
|
int br_cfm_mep_delete(struct net_bridge *br,
|
|
const u32 instance,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
mep_delete_implementation(br, mep);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_mep_config_set(struct net_bridge *br,
|
|
const u32 instance,
|
|
const struct br_cfm_mep_config *const config,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
mep->config = *config;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_cc_config_set(struct net_bridge *br,
|
|
const u32 instance,
|
|
const struct br_cfm_cc_config *const config,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_peer_mep *peer_mep;
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Check for no change in configuration */
|
|
if (memcmp(config, &mep->cc_config, sizeof(*config)) == 0)
|
|
return 0;
|
|
|
|
if (config->enable && !mep->cc_config.enable)
|
|
/* CC is enabled */
|
|
hlist_for_each_entry(peer_mep, &mep->peer_mep_list, head)
|
|
cc_peer_enable(peer_mep);
|
|
|
|
if (!config->enable && mep->cc_config.enable)
|
|
/* CC is disabled */
|
|
hlist_for_each_entry(peer_mep, &mep->peer_mep_list, head)
|
|
cc_peer_disable(peer_mep);
|
|
|
|
mep->cc_config = *config;
|
|
mep->ccm_rx_snumber = 0;
|
|
mep->ccm_tx_snumber = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_cc_peer_mep_add(struct net_bridge *br, const u32 instance,
|
|
u32 mepid,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_peer_mep *peer_mep;
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
peer_mep = br_peer_mep_find(mep, mepid);
|
|
if (peer_mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Peer MEP-ID already exists");
|
|
return -EEXIST;
|
|
}
|
|
|
|
peer_mep = kzalloc(sizeof(*peer_mep), GFP_KERNEL);
|
|
if (!peer_mep)
|
|
return -ENOMEM;
|
|
|
|
peer_mep->mepid = mepid;
|
|
peer_mep->mep = mep;
|
|
INIT_DELAYED_WORK(&peer_mep->ccm_rx_dwork, ccm_rx_work_expired);
|
|
|
|
if (mep->cc_config.enable)
|
|
cc_peer_enable(peer_mep);
|
|
|
|
hlist_add_tail_rcu(&peer_mep->head, &mep->peer_mep_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_cc_peer_mep_remove(struct net_bridge *br, const u32 instance,
|
|
u32 mepid,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_peer_mep *peer_mep;
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
peer_mep = br_peer_mep_find(mep, mepid);
|
|
if (!peer_mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Peer MEP-ID does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
cc_peer_disable(peer_mep);
|
|
|
|
hlist_del_rcu(&peer_mep->head);
|
|
kfree_rcu(peer_mep, rcu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_cc_rdi_set(struct net_bridge *br, const u32 instance,
|
|
const bool rdi, struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
mep->rdi = rdi;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_cc_ccm_tx(struct net_bridge *br, const u32 instance,
|
|
const struct br_cfm_cc_ccm_tx_info *const tx_info,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mep = br_mep_find(br, instance);
|
|
if (!mep) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"MEP instance does not exists");
|
|
return -ENOENT;
|
|
}
|
|
|
|
if (memcmp(tx_info, &mep->cc_ccm_tx_info, sizeof(*tx_info)) == 0) {
|
|
/* No change in tx_info. */
|
|
if (mep->cc_ccm_tx_info.period == 0)
|
|
/* Transmission is not enabled - just return */
|
|
return 0;
|
|
|
|
/* Transmission is ongoing, the end time is recalculated */
|
|
mep->ccm_tx_end = jiffies +
|
|
usecs_to_jiffies(tx_info->period * 1000000);
|
|
return 0;
|
|
}
|
|
|
|
if (tx_info->period == 0 && mep->cc_ccm_tx_info.period == 0)
|
|
/* Some change in info and transmission is not ongoing */
|
|
goto save;
|
|
|
|
if (tx_info->period != 0 && mep->cc_ccm_tx_info.period != 0) {
|
|
/* Some change in info and transmission is ongoing
|
|
* The end time is recalculated
|
|
*/
|
|
mep->ccm_tx_end = jiffies +
|
|
usecs_to_jiffies(tx_info->period * 1000000);
|
|
|
|
goto save;
|
|
}
|
|
|
|
if (tx_info->period == 0 && mep->cc_ccm_tx_info.period != 0) {
|
|
cancel_delayed_work_sync(&mep->ccm_tx_dwork);
|
|
goto save;
|
|
}
|
|
|
|
/* Start delayed work to transmit CCM frames. It is done with zero delay
|
|
* to send first frame immediately
|
|
*/
|
|
mep->ccm_tx_end = jiffies + usecs_to_jiffies(tx_info->period * 1000000);
|
|
queue_delayed_work(system_wq, &mep->ccm_tx_dwork, 0);
|
|
|
|
save:
|
|
mep->cc_ccm_tx_info = *tx_info;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_mep_count(struct net_bridge *br, u32 *count)
|
|
{
|
|
struct br_cfm_mep *mep;
|
|
|
|
*count = 0;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(mep, &br->mep_list, head)
|
|
*count += 1;
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
|
|
{
|
|
struct br_cfm_peer_mep *peer_mep;
|
|
struct br_cfm_mep *mep;
|
|
|
|
*count = 0;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(mep, &br->mep_list, head)
|
|
hlist_for_each_entry_rcu(peer_mep, &mep->peer_mep_list, head)
|
|
*count += 1;
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool br_cfm_created(struct net_bridge *br)
|
|
{
|
|
return !hlist_empty(&br->mep_list);
|
|
}
|
|
|
|
/* Deletes the CFM instances on a specific bridge port
|
|
*/
|
|
void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *port)
|
|
{
|
|
struct hlist_node *n_store;
|
|
struct br_cfm_mep *mep;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
hlist_for_each_entry_safe(mep, n_store, &br->mep_list, head)
|
|
if (mep->create.ifindex == port->dev->ifindex)
|
|
mep_delete_implementation(br, mep);
|
|
}
|