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bh=a/4H8ipMzlqKesV3+ytiA59TNqpomYQHxsCepo1ZLLA=; b=COvu6bncNeTKzdL9dK2Lz3yXDMrN2qQ5FW5QBMtH2WsnMKNqYtIj9Etd59P/6icqAHc+Uq 8Ca74BsvNdsvv7Bu6u2pda0CbWt9D84HBG4LM0lqO2vqoqAS+iwnIKm2HBBKl5k7VlxpGc dKd2rGx5PeLX11IN2fZHtRzmM4MGkQc= X-MC-Unique: Uoqc45ADMhm2pnYXwM98nA-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: quintela@redhat.com, peterx@redhat.com, leobras@redhat.com Subject: [PATCH 48/52] migration/rdma: Silence qemu_rdma_block_for_wrid() Date: Mon, 18 Sep 2023 16:42:02 +0200 Message-ID: <20230918144206.560120-49-armbru@redhat.com> In-Reply-To: <20230918144206.560120-1-armbru@redhat.com> References: <20230918144206.560120-1-armbru@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 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=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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=ham 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: 1695048550363100001 Content-Type: text/plain; charset="utf-8" Functions that use an Error **errp parameter to return errors should not also report them to the user, because reporting is the caller's job. When the caller does, the error is reported twice. When it doesn't (because it recovered from the error), there is no error to report, i.e. the report is bogus. qemu_rdma_post_send_control(), qemu_rdma_exchange_get_response(), and qemu_rdma_write_one() violate this principle: they call error_report(), fprintf(stderr, ...), and perror() via qemu_rdma_block_for_wrid(), qemu_rdma_poll(), and qemu_rdma_wait_comp_channel(). I elected not to investigate how callers handle the error, i.e. precise impact is not known. Clean this up by dropping the error reporting from qemu_rdma_poll(), qemu_rdma_wait_comp_channel(), and qemu_rdma_block_for_wrid(). I believe the callers' error reports suffice. If they don't, we need to convert to Error instead. Signed-off-by: Markus Armbruster Reviewed-by: Li Zhijian --- migration/rdma.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index cbf5e6b9a8..99dccdeae5 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -1467,17 +1467,12 @@ static int qemu_rdma_poll(RDMAContext *rdma, struct= ibv_cq *cq, } =20 if (ret < 0) { - error_report("ibv_poll_cq failed"); return -1; } =20 wr_id =3D wc.wr_id & RDMA_WRID_TYPE_MASK; =20 if (wc.status !=3D IBV_WC_SUCCESS) { - fprintf(stderr, "ibv_poll_cq wc.status=3D%d %s!\n", - wc.status, ibv_wc_status_str(wc.status)); - fprintf(stderr, "ibv_poll_cq wrid=3D%" PRIu64 "!\n", wr_id); - return -1; } =20 @@ -1561,16 +1556,12 @@ static int qemu_rdma_wait_comp_channel(RDMAContext = *rdma, if (pfds[1].revents) { ret =3D rdma_get_cm_event(rdma->channel, &cm_event); if (ret < 0) { - error_report("failed to get cm event while wait " - "completion channel"); return -1; } =20 if (cm_event->event =3D=3D RDMA_CM_EVENT_DISCONNECTED = || cm_event->event =3D=3D RDMA_CM_EVENT_DEVICE_REMOVA= L) { rdma_ack_cm_event(cm_event); - error_report("receive cm event while wait comp cha= nnel," - "cm event is %d", cm_event->event); return -1; } rdma_ack_cm_event(cm_event); @@ -1583,7 +1574,6 @@ static int qemu_rdma_wait_comp_channel(RDMAContext *r= dma, default: /* Error of some type - * I don't trust errno from qemu_poll_ns */ - error_report("%s: poll failed", __func__); return -1; } =20 @@ -1667,7 +1657,6 @@ static int qemu_rdma_block_for_wrid(RDMAContext *rdma, =20 ret =3D ibv_get_cq_event(ch, &cq, &cq_ctx); if (ret < 0) { - perror("ibv_get_cq_event"); goto err_block_for_wrid; } =20 --=20 2.41.0