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(). The following patches
will introduce such changes for VFIO first.
Cc: Nicholas Piggin <npig...@gmail.com>
Cc: Harsh Prateek Bora <hars...@linux.ibm.com>
Cc: Halil Pasic <pa...@linux.ibm.com>
Cc: Thomas Huth <th...@redhat.com>
Cc: Eric Blake <ebl...@redhat.com>
Cc: Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru>
Cc: John Snow <js...@redhat.com>
Cc: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Reviewed-by: Peter Xu <pet...@redhat.com>
Signed-off-by: Cédric Le Goater <c...@redhat.com>
---
Changes in v2:
- dropped qemu_file_set_error_obj(f, ret, local_err);
include/migration/register.h | 3 ++-
hw/ppc/spapr.c | 2 +-
hw/s390x/s390-stattrib.c | 2 +-
hw/vfio/migration.c | 2 +-
migration/block-dirty-bitmap.c | 2 +-
migration/block.c | 2 +-
migration/ram.c | 3 ++-
migration/savevm.c | 2 +-
8 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/include/migration/register.h b/include/migration/register.h
index
2cc71ec45f65bf2884c9e7a823d2968752f15c20..96eae9dba2970552c379c732393e3ab6ef578a58
100644
--- a/include/migration/register.h
+++ b/include/migration/register.h
@@ -60,10 +60,11 @@ typedef struct SaveVMHandlers {
*
* @f: QEMUFile where to send the data
* @opaque: data pointer passed to register_savevm_live()
+ * @errp: pointer to Error*, to store an error if it happens.
*
* Returns zero to indicate success and negative for error
*/
- int (*save_setup)(QEMUFile *f, void *opaque);
+ int (*save_setup)(QEMUFile *f, void *opaque, Error **errp);
/**
* @save_cleanup
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index
55263f0815ed7671b32ea20b394ae71c82e616cb..045c024ffa76eacfc496bd486cb6cafbee2df73e
100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2142,7 +2142,7 @@ static const VMStateDescription vmstate_spapr = {
}
};
-static int htab_save_setup(QEMUFile *f, void *opaque)
+static int htab_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
SpaprMachineState *spapr = opaque;
diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c
index
c483b62a9b5f71772639fc180bdad15ecb6711cb..c934df424a555d83d2198f5ddfc0cbe0ea98e9ec
100644
--- a/hw/s390x/s390-stattrib.c
+++ b/hw/s390x/s390-stattrib.c
@@ -166,7 +166,7 @@ static int cmma_load(QEMUFile *f, void *opaque, int
version_id)
return ret;
}
-static int cmma_save_setup(QEMUFile *f, void *opaque)
+static int cmma_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
S390StAttribState *sas = S390_STATTRIB(opaque);
S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index
70e6b1a709f9b67e4c9eb41033d76347275cac42..8bcb4bc73cd5ba5338e3ffa4d907d0e6bfbb9485
100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -378,7 +378,7 @@ static int vfio_save_prepare(void *opaque, Error **errp)
return 0;
}
-static int vfio_save_setup(QEMUFile *f, void *opaque)
+static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c
index
2708abf3d762de774ed294d3fdb8e56690d2974c..16f84e6c57c2403a8c2d6319f4e7b6360dade28c
100644
--- a/migration/block-dirty-bitmap.c
+++ b/migration/block-dirty-bitmap.c
@@ -1213,7 +1213,7 @@ fail:
return ret;
}
-static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque)
+static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
DBMSaveState *s = &((DBMState *)opaque)->save;
SaveBitmapState *dbms = NULL;
diff --git a/migration/block.c b/migration/block.c
index
8c6ebafacc1ffe930d1d4f19d968817b14852c69..df15319ceab66201b043f15eac1b0a7d6522b60c
100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -708,7 +708,7 @@ static void block_migration_cleanup(void *opaque)
blk_mig_unlock();
}
-static int block_save_setup(QEMUFile *f, void *opaque)
+static int block_save_setup(QEMUFile *f, void *opaque, Error **errp)
{
int ret;
diff --git a/migration/ram.c b/migration/ram.c
index
4649a8120492a03d331d660622e1a0a51adb0a96..745482899e18c86b73261b683c1bec04039a76d2
100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2930,8 +2930,9 @@ void qemu_guest_free_page_hint(void *addr, size_t len)
*
* @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;
diff --git a/migration/savevm.c b/migration/savevm.c
index
bc168371a31acf85f29f2c284be181250db45df4..b5b3b51bad94dc4c04ae22cd687ba111299339aa
100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1341,7 +1341,7 @@ int qemu_savevm_state_setup(QEMUFile *f, Error **errp)
}
save_section_header(f, se, QEMU_VM_SECTION_START);
- ret = se->ops->save_setup(f, se->opaque);
+ ret = se->ops->save_setup(f, se->opaque, errp);
save_section_footer(f, se);
if (ret < 0) {
qemu_file_set_error(f, ret);
--
2.43.2
