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Merge branch 'net-hsr-use-the-seqnr-lock-for-frames-received-via-interlink-port'

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Sebastian Andrzej Siewior says:

====================
net: hsr: Use the seqnr lock for frames received via interlink port.

This is follow-up to the thread at
https://lore.kernel.org/all/20240904133725.1073963-1-edumazet@google.com/
====================

Link: https://patch.msgid.link/20240906132816.657485-1-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-09-11 15:49:09 -07:00
commit 8b5d2e5cf0
3 changed files with 10 additions and 3 deletions
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1
net/hsr/hsr_device.c
View File

@ -625,7 +625,6 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
/* Overflow soon to find bugs easier: */
hsr->sequence_nr = HSR_SEQNR_START;
hsr->sup_sequence_nr = HSR_SUP_SEQNR_START;
hsr->interlink_sequence_nr = HSR_SEQNR_START;
timer_setup(&hsr->announce_timer, hsr_announce, 0);
timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0);

1
net/hsr/hsr_main.h
View File

@ -203,7 +203,6 @@ struct hsr_priv {
struct timer_list prune_proxy_timer;
int announce_count;
u16 sequence_nr;
u16 interlink_sequence_nr; /* Interlink port seq_nr */
u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */
enum hsr_version prot_version; /* Indicate if HSRv0, HSRv1 or PRPv1 */
spinlock_t seqnr_lock; /* locking for sequence_nr */

11
net/hsr/hsr_slave.c
View File

@ -67,7 +67,16 @@ static rx_handler_result_t hsr_handle_frame(struct sk_buff **pskb)
skb_set_network_header(skb, ETH_HLEN + HSR_HLEN);
skb_reset_mac_len(skb);
hsr_forward_skb(skb, port);
/* Only the frames received over the interlink port will assign a
* sequence number and require synchronisation vs other sender.
*/
if (port->type == HSR_PT_INTERLINK) {
spin_lock_bh(&hsr->seqnr_lock);
hsr_forward_skb(skb, port);
spin_unlock_bh(&hsr->seqnr_lock);
} else {
hsr_forward_skb(skb, port);
}
finish_consume:
return RX_HANDLER_CONSUMED;