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bh=Rhg1zVR/KkRoYk8vgxinEsCnHBen4As/1Px29DrecbU=; b=FjHpXH8nrvP++BTb6yNn/ygXyI5rztBWo59WOcWfHTFvzNxXbtYJsG0rXEgUI2R0y+j0O2 Owes45hXCYWL+w4B1EB+di2tCCBFV2HBoFrNgp2P8GdR8K5S7USdz8lXY4M3QqDaQfXto3 IgLLykLzyUmCCHZGwrHL0BbIy2xPpYA= X-MC-Unique: 3XGrUekeMYaYjFFeoG5z8A-1 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org, Halil Pasic , Christian Borntraeger , Eric Farman , Richard Henderson , David Hildenbrand , Ilya Leoshkevich , Thomas Huth Cc: Peter Xu , Fabiano Rosas , Alex Williamson , Avihai Horon , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Markus Armbruster , Prasad Pandit , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-s390x@nongnu.org Subject: [PATCH for-9.1 v5 01/14] s390/stattrib: Add Error** argument to set_migrationmode() handler Date: Wed, 20 Mar 2024 07:48:57 +0100 Message-ID: <20240320064911.545001-2-clg@redhat.com> In-Reply-To: <20240320064911.545001-1-clg@redhat.com> References: <20240320064911.545001-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.422, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1710917441091100007 This will prepare ground for future changes adding an Error** argument to the save_setup() handler. We need to make sure that on failure, set_migrationmode() always sets a new error. See the Rules section in qapi/error.h. Cc: Halil Pasic Cc: Christian Borntraeger Cc: Thomas Huth Reviewed-by: Fabiano Rosas Reviewed-by: Thomas Huth Signed-off-by: C=C3=A9dric Le Goater --- include/hw/s390x/storage-attributes.h | 2 +- hw/s390x/s390-stattrib-kvm.c | 12 ++++++++++-- hw/s390x/s390-stattrib.c | 15 ++++++++++----- 3 files changed, 21 insertions(+), 8 deletions(-) diff --git a/include/hw/s390x/storage-attributes.h b/include/hw/s390x/stora= ge-attributes.h index 5239eb538c1b087797867a247abfc14551af6a4d..8921a04d514bf64a3113255ee10= ed33fc598ae06 100644 --- a/include/hw/s390x/storage-attributes.h +++ b/include/hw/s390x/storage-attributes.h @@ -39,7 +39,7 @@ struct S390StAttribClass { int (*set_stattr)(S390StAttribState *sa, uint64_t start_gfn, uint32_t count, uint8_t *values); void (*synchronize)(S390StAttribState *sa); - int (*set_migrationmode)(S390StAttribState *sa, bool value); + int (*set_migrationmode)(S390StAttribState *sa, bool value, Error **er= rp); int (*get_active)(S390StAttribState *sa); long long (*get_dirtycount)(S390StAttribState *sa); }; diff --git a/hw/s390x/s390-stattrib-kvm.c b/hw/s390x/s390-stattrib-kvm.c index 24cd01382e2d74d62c2d7e980eb6aca1077d893d..eeaa8110981c970e91a8948f027= e398c34637321 100644 --- a/hw/s390x/s390-stattrib-kvm.c +++ b/hw/s390x/s390-stattrib-kvm.c @@ -17,6 +17,7 @@ #include "sysemu/kvm.h" #include "exec/ram_addr.h" #include "kvm/kvm_s390x.h" +#include "qapi/error.h" =20 Object *kvm_s390_stattrib_create(void) { @@ -137,14 +138,21 @@ static void kvm_s390_stattrib_synchronize(S390StAttri= bState *sa) } } =20 -static int kvm_s390_stattrib_set_migrationmode(S390StAttribState *sa, bool= val) +static int kvm_s390_stattrib_set_migrationmode(S390StAttribState *sa, bool= val, + Error **errp) { struct kvm_device_attr attr =3D { .group =3D KVM_S390_VM_MIGRATION, .attr =3D val, .addr =3D 0, }; - return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); + int r; + + r =3D kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); + if (r) { + error_setg_errno(errp, -r, "setting KVM_S390_VM_MIGRATION failed"); + } + return r; } =20 static long long kvm_s390_stattrib_get_dirtycount(S390StAttribState *sa) diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c index c483b62a9b5f71772639fc180bdad15ecb6711cb..b743e8a2fee84c7374460ccea6d= f1cf447cda44b 100644 --- a/hw/s390x/s390-stattrib.c +++ b/hw/s390x/s390-stattrib.c @@ -60,11 +60,13 @@ void hmp_migrationmode(Monitor *mon, const QDict *qdict) S390StAttribState *sas =3D s390_get_stattrib_device(); S390StAttribClass *sac =3D S390_STATTRIB_GET_CLASS(sas); uint64_t what =3D qdict_get_int(qdict, "mode"); + Error *local_err =3D NULL; int r; =20 - r =3D sac->set_migrationmode(sas, what); + r =3D sac->set_migrationmode(sas, what, &local_err); if (r < 0) { - monitor_printf(mon, "Error: %s", strerror(-r)); + monitor_printf(mon, "Error: %s", error_get_pretty(local_err)); + error_free(local_err); } } =20 @@ -170,13 +172,15 @@ static int cmma_save_setup(QEMUFile *f, void *opaque) { S390StAttribState *sas =3D S390_STATTRIB(opaque); S390StAttribClass *sac =3D S390_STATTRIB_GET_CLASS(sas); + Error *local_err =3D NULL; int res; /* * Signal that we want to start a migration, thus needing PGSTE dirty * tracking. */ - res =3D sac->set_migrationmode(sas, 1); + res =3D sac->set_migrationmode(sas, true, &local_err); if (res) { + error_report_err(local_err); return res; } qemu_put_be64(f, STATTR_FLAG_EOS); @@ -260,7 +264,7 @@ static void cmma_save_cleanup(void *opaque) { S390StAttribState *sas =3D S390_STATTRIB(opaque); S390StAttribClass *sac =3D S390_STATTRIB_GET_CLASS(sas); - sac->set_migrationmode(sas, 0); + sac->set_migrationmode(sas, false, NULL); } =20 static bool cmma_active(void *opaque) @@ -293,7 +297,8 @@ static long long qemu_s390_get_dirtycount_stub(S390StAt= tribState *sa) { return 0; } -static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool va= lue) +static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool va= lue, + Error **errp) { return 0; } --=20 2.44.0