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Add a filter option to drop all cluster packets (#1252)

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A minor debugging change that helped in the investigation of
https://github.com/valkey-io/valkey/issues/1251. Basically there are
some edge cases where we want to fully isolate a note from receiving
packets, but can't suspend the process because we need it to continue
sending outbound traffic. So, added a filter for that.

Signed-off-by: Madelyn Olson <madelyneolson@gmail.com>
This commit is contained in:
Madelyn Olson 2024-11-04 12:36:20 -08:00 committed by GitHub
parent a102852d5e
commit 3c32ee1bda
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GPG Key ID: B5690EEEBB952194
2 changed files with 4 additions and 3 deletions
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5
src/cluster_legacy.c
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@ -2981,7 +2981,7 @@ int clusterIsValidPacket(clusterLink *link) {
return 0;
}
if (type == server.cluster_drop_packet_filter) {
if (type == server.cluster_drop_packet_filter || server.cluster_drop_packet_filter == -2) {
serverLog(LL_WARNING, "Dropping packet that matches debug drop filter");
return 0;
}
@ -3070,7 +3070,8 @@ int clusterProcessPacket(clusterLink *link) {
if (!clusterIsValidPacket(link)) {
clusterMsg *hdr = (clusterMsg *)link->rcvbuf;
uint16_t type = ntohs(hdr->type);
if (server.debug_cluster_close_link_on_packet_drop && type == server.cluster_drop_packet_filter) {
if (server.debug_cluster_close_link_on_packet_drop &&
(type == server.cluster_drop_packet_filter || server.cluster_drop_packet_filter == -2)) {
freeClusterLink(link);
serverLog(LL_WARNING, "Closing link for matching packet type %hu", type);
return 0;

2
src/debug.c
View File

@ -432,7 +432,7 @@ void debugCommand(client *c) {
" Some fields of the default behavior may be time consuming to fetch,",
" and `fast` can be passed to avoid fetching them.",
"DROP-CLUSTER-PACKET-FILTER <packet-type>",
" Drop all packets that match the filtered type. Set to -1 allow all packets.",
" Drop all packets that match the filtered type. Set to -1 allow all packets or -2 to drop all packets.",
"CLOSE-CLUSTER-LINK-ON-PACKET-DROP <0|1>",
" This is valid only when DROP-CLUSTER-PACKET-FILTER is set to a valid packet type.",
" When set to 1, the cluster link is closed after dropping a packet based on the filter.",