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[PATCH v6 09/13] migration: Enable TLS for preempt channel
From: |
Peter Xu |
Subject: |
[PATCH v6 09/13] migration: Enable TLS for preempt channel |
Date: |
Tue, 17 May 2022 15:57:26 -0400 |
This patch is based on the async preempt channel creation. It continues
wiring up the new channel with TLS handshake to destionation when enabled.
Note that only the src QEMU needs such operation; the dest QEMU does not
need any change for TLS support due to the fact that all channels are
established synchronously there, so all the TLS magic is already properly
handled by migration_tls_channel_process_incoming().
Signed-off-by: Peter Xu <peterx@redhat.com>
---
migration/postcopy-ram.c | 57 ++++++++++++++++++++++++++++++++++------
migration/trace-events | 1 +
2 files changed, 50 insertions(+), 8 deletions(-)
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 1bb603051a..4a4da16389 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -36,6 +36,7 @@
#include "socket.h"
#include "qemu-file-channel.h"
#include "yank_functions.h"
+#include "tls.h"
/* Arbitrary limit on size of each discard command,
* keeps them around ~200 bytes
@@ -1552,15 +1553,15 @@ bool
postcopy_preempt_new_channel(MigrationIncomingState *mis, QEMUFile *file)
return true;
}
+/*
+ * Setup the postcopy preempt channel with the IOC. If ERROR is specified,
+ * setup the error instead. This helper will free the ERROR if specified.
+ */
static void
-postcopy_preempt_send_channel_new(QIOTask *task, gpointer opaque)
+postcopy_preempt_send_channel_done(MigrationState *s,
+ QIOChannel *ioc, Error *local_err)
{
- MigrationState *s = opaque;
- QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
- Error *local_err = NULL;
-
- if (qio_task_propagate_error(task, &local_err)) {
- /* Something wrong happened.. */
+ if (local_err) {
migrate_set_error(s, local_err);
error_free(local_err);
} else {
@@ -1574,7 +1575,47 @@ postcopy_preempt_send_channel_new(QIOTask *task,
gpointer opaque)
* postcopy_qemufile_src to know whether it failed or not.
*/
qemu_sem_post(&s->postcopy_qemufile_src_sem);
- object_unref(OBJECT(ioc));
+}
+
+static void
+postcopy_preempt_tls_handshake(QIOTask *task, gpointer opaque)
+{
+ g_autoptr(QIOChannel) ioc = QIO_CHANNEL(qio_task_get_source(task));
+ MigrationState *s = opaque;
+ Error *local_err = NULL;
+
+ qio_task_propagate_error(task, &local_err);
+ postcopy_preempt_send_channel_done(s, ioc, local_err);
+}
+
+static void
+postcopy_preempt_send_channel_new(QIOTask *task, gpointer opaque)
+{
+ g_autoptr(QIOChannel) ioc = QIO_CHANNEL(qio_task_get_source(task));
+ MigrationState *s = opaque;
+ QIOChannelTLS *tioc;
+ Error *local_err = NULL;
+
+ if (qio_task_propagate_error(task, &local_err)) {
+ goto out;
+ }
+
+ if (migrate_channel_requires_tls(ioc)) {
+ tioc = migration_tls_client_create(s, ioc, s->hostname, &local_err);
+ if (!tioc) {
+ goto out;
+ }
+ trace_postcopy_preempt_tls_handshake();
+ qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-preempt");
+ qio_channel_tls_handshake(tioc, postcopy_preempt_tls_handshake,
+ s, NULL, NULL);
+ /* Setup the channel until TLS handshake finished */
+ return;
+ }
+
+out:
+ /* This handles both good and error cases */
+ postcopy_preempt_send_channel_done(s, ioc, local_err);
}
/* Returns 0 if channel established, -1 for error. */
diff --git a/migration/trace-events b/migration/trace-events
index 0e385c3a07..a34afe7b85 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -287,6 +287,7 @@ postcopy_request_shared_page(const char *sharer, const char
*rb, uint64_t rb_off
postcopy_request_shared_page_present(const char *sharer, const char *rb,
uint64_t rb_offset) "%s already %s offset 0x%"PRIx64
postcopy_wake_shared(uint64_t client_addr, const char *rb) "at 0x%"PRIx64" in
%s"
postcopy_page_req_del(void *addr, int count) "resolved page req %p total %d"
+postcopy_preempt_tls_handshake(void) ""
postcopy_preempt_new_channel(void) ""
postcopy_preempt_thread_entry(void) ""
postcopy_preempt_thread_exit(void) ""
--
2.32.0
- [PATCH v6 00/13] migration: Postcopy Preemption, Peter Xu, 2022/05/17
- [PATCH v6 01/13] migration: Add postcopy-preempt capability, Peter Xu, 2022/05/17
- [PATCH v6 02/13] migration: Postcopy preemption preparation on channel creation, Peter Xu, 2022/05/17
- [PATCH v6 03/13] migration: Postcopy preemption enablement, Peter Xu, 2022/05/17
- [PATCH v6 07/13] migration: Add helpers to detect TLS capability, Peter Xu, 2022/05/17
- [PATCH v6 05/13] migration: Create the postcopy preempt channel asynchronously, Peter Xu, 2022/05/17
- [PATCH v6 09/13] migration: Enable TLS for preempt channel,
Peter Xu <=
- [PATCH v6 08/13] migration: Export tls-[creds|hostname|authz] params to cmdline too, Peter Xu, 2022/05/17
- [PATCH v6 11/13] tests: Add postcopy tls migration test, Peter Xu, 2022/05/17
- [PATCH v6 12/13] tests: Add postcopy tls recovery migration test, Peter Xu, 2022/05/17
- [PATCH v6 13/13] tests: Add postcopy preempt tests, Peter Xu, 2022/05/17