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bh=P38lkBR2tXfHat2gPQMUxrdNBlKPaKNGbHcoKTIPWWE=; b=VdMPWZw5mgoxXfq+8OtZuhErVTaFW2fz1Zr7q/VenHThZoDfxLYrLRdWbTIVPcdezdvtIY 6x9bNMj8Vlptnb8rhDfVo7Ol79NbqopdAHbnnsQXe5GFn9prqsg1fQwDLPjLHjjzTdHb3l P5aolA+maKqpeS1ZEo8o7URYmpbMW3U= X-MC-Unique: PlgYXqqZMuyiIrT1aaYYXQ-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: Kevin Wolf , libvir-list@redhat.com, Stefan Hajnoczi , Fam Zheng , Hanna Reitz , Li Zhijian , Peter Xu , Leonardo Bras , Juan Quintela , Eric Blake , Markus Armbruster , Hailiang Zhang , qemu-block@nongnu.org, Fabiano Rosas , Thomas Huth Subject: [PULL 26/38] migration: Stop migration immediately in RDMA error paths Date: Tue, 31 Oct 2023 10:01:30 +0100 Message-ID: <20231031090142.13122-27-quintela@redhat.com> In-Reply-To: <20231031090142.13122-1-quintela@redhat.com> References: <20231031090142.13122-1-quintela@redhat.com> MIME-Version: 1.0 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=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.483, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: 1698743246485100003 Content-Type: text/plain; charset="utf-8" From: Peter Xu In multiple places, RDMA errors are handled in a strange way, where it only sets qemu_file_set_error() but not stop the migration immediately. It's not obvious what will happen later if there is already an error. Make all such failures stop migration immediately. Cc: Zhijian Li (Fujitsu) Cc: Markus Armbruster Cc: Juan Quintela Cc: Fabiano Rosas Reported-by: Thomas Huth Signed-off-by: Peter Xu Reviewed-by: Juan Quintela Reviewed-by: Fabiano Rosas Signed-off-by: Juan Quintela Message-ID: <20231024163933.516546-1-peterx@redhat.com> --- migration/ram.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 024dedb6b1..20e6153114 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2973,11 +2973,13 @@ static int ram_save_setup(QEMUFile *f, void *opaque) ret =3D rdma_registration_start(f, RAM_CONTROL_SETUP); if (ret < 0) { qemu_file_set_error(f, ret); + return ret; } =20 ret =3D rdma_registration_stop(f, RAM_CONTROL_SETUP); if (ret < 0) { qemu_file_set_error(f, ret); + return ret; } =20 migration_ops =3D g_malloc0(sizeof(MigrationOps)); @@ -3043,6 +3045,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque) ret =3D rdma_registration_start(f, RAM_CONTROL_ROUND); if (ret < 0) { qemu_file_set_error(f, ret); + goto out; } =20 t0 =3D qemu_clock_get_ns(QEMU_CLOCK_REALTIME); @@ -3147,8 +3150,6 @@ static int ram_save_complete(QEMUFile *f, void *opaqu= e) rs->last_stage =3D !migration_in_colo_state(); =20 WITH_RCU_READ_LOCK_GUARD() { - int rdma_reg_ret; - if (!migration_in_postcopy()) { migration_bitmap_sync_precopy(rs, true); } @@ -3156,6 +3157,7 @@ static int ram_save_complete(QEMUFile *f, void *opaqu= e) ret =3D rdma_registration_start(f, RAM_CONTROL_FINISH); if (ret < 0) { qemu_file_set_error(f, ret); + return ret; } =20 /* try transferring iterative blocks of memory */ @@ -3171,24 +3173,21 @@ static int ram_save_complete(QEMUFile *f, void *opa= que) break; } if (pages < 0) { - ret =3D pages; - break; + qemu_mutex_unlock(&rs->bitmap_mutex); + return pages; } } qemu_mutex_unlock(&rs->bitmap_mutex); =20 compress_flush_data(); =20 - rdma_reg_ret =3D rdma_registration_stop(f, RAM_CONTROL_FINISH); - if (rdma_reg_ret < 0) { - qemu_file_set_error(f, rdma_reg_ret); + ret =3D rdma_registration_stop(f, RAM_CONTROL_FINISH); + if (ret < 0) { + qemu_file_set_error(f, ret); + return ret; } } =20 - if (ret < 0) { - return ret; - } - ret =3D multifd_send_sync_main(rs->pss[RAM_CHANNEL_PRECOPY].pss_channe= l); if (ret < 0) { return ret; --=20 2.41.0