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migration: Add Error** argument to .save_setup() handler

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The purpose is to record a potential error in the migration stream if
qemu_savevm_state_setup() fails. Most of the current .save_setup()
handlers can be modified to use the Error argument instead of managing
their own and calling locally error_report().

Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Harsh Prateek Bora <harshpb@linux.ibm.com>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
Cc: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Cc: John Snow <jsnow@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240320064911.545001-8-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Cédric Le Goater 2024-03-20 07:49:03 +01:00 • committed by Peter Xu
parent 057a20099b
commit 01c3ac681b
8 changed files with 29 additions and 35 deletions
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15
migration/ram.c
View file

@ -3066,22 +3066,23 @@ static bool mapped_ram_read_header(QEMUFile *file, MappedRamHeader *header,
*
* @f: QEMUFile where to send the data
* @opaque: RAMState pointer
* @errp: pointer to Error*, to store an error if it happens.
*/
static int ram_save_setup(QEMUFile *f, void *opaque)
static int ram_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
RAMState **rsp = opaque;
RAMBlock *block;
int ret, max_hg_page_size;
if (compress_threads_save_setup()) {
error_report("%s: failed to start compress threads", __func__);
error_setg(errp, "%s: failed to start compress threads", __func__);
return -1;
}
/* migration has already setup the bitmap, reuse it. */
if (!migration_in_colo_state()) {
if (ram_init_all(rsp) != 0) {
error_report("%s: failed to setup RAM for migration", __func__);
error_setg(errp, "%s: failed to setup RAM for migration", __func__);
compress_threads_save_cleanup();
return -1;
}
@ -3118,14 +3119,14 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
ret = rdma_registration_start(f, RAM_CONTROL_SETUP);
if (ret < 0) {
error_report("%s: failed to start RDMA registration", __func__);
error_setg(errp, "%s: failed to start RDMA registration", __func__);
qemu_file_set_error(f, ret);
return ret;
}
ret = rdma_registration_stop(f, RAM_CONTROL_SETUP);
if (ret < 0) {
error_report("%s: failed to stop RDMA registration", __func__);
error_setg(errp, "%s: failed to stop RDMA registration", __func__);
qemu_file_set_error(f, ret);
return ret;
}
@ -3142,7 +3143,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
ret = multifd_send_sync_main();
bql_lock();
if (ret < 0) {
error_report("%s: multifd synchronization failed", __func__);
error_setg(errp, "%s: multifd synchronization failed", __func__);
return ret;
}
@ -3154,7 +3155,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
ret = qemu_fflush(f);
if (ret < 0) {
error_report("%s failed : %s", __func__, strerror(-ret));
error_setg_errno(errp, -ret, "%s failed", __func__);
}
return ret;
}