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Add interfaces and configuration bits for passt-repair

Browse source 
In vhost-user mode, by default, create a second UNIX domain socket
accepting connections from passt-repair, with the usual listener
socket.

When we need to set or clear TCP_REPAIR on sockets, we'll send them
via SCM_RIGHTS to passt-repair, who sets the socket option values we
ask for.

To that end, introduce batched functions to request TCP_REPAIR
settings on sockets, so that we don't have to send a single message
for each socket, on migration. When needed, repair_flush() will
send the message and check for the reply.

Co-authored-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2025-02-12 18:07:15 +11:00
parent 155cd0c41e
commit b899141ad5
12 changed files with 381 additions and 73 deletions

5
migrate.c
View file

@ -23,6 +23,7 @@
#include "flow_table.h"
#include "migrate.h"
#include "repair.h"
/* Magic identifier for migration data */
#define MIGRATE_MAGIC 0xB1BB1D1B0BB1D1B0
@ -232,7 +233,7 @@ void migrate_init(struct ctx *c)
}
/**
* migrate_close() - Close migration channel
* migrate_close() - Close migration channel and connection to passt-repair
* @c: Execution context
*/
void migrate_close(struct ctx *c)
@ -243,6 +244,8 @@ void migrate_close(struct ctx *c)
c->device_state_fd = -1;
c->device_state_result = -1;
}
repair_close(c);
}
/**