From f3805964f8cd79a534c20dfc95ed3000145a5d82 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 28 Sep 2023 15:20:08 +0200 Subject: [PATCH] migration/rdma: Convert qemu_rdma_post_send_control() to Error 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_exchange_send() violates this principle: it calls error_report() via qemu_rdma_post_send_control(). I elected not to investigate how callers handle the error, i.e. precise impact is not known. Clean this up by converting qemu_rdma_post_send_control() to Error. Signed-off-by: Markus Armbruster Reviewed-by: Li Zhijian Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Message-ID: <20230928132019.2544702-43-armbru@redhat.com> --- migration/rdma.c | 31 +++++++++++++++++-------------- 1 file changed, 17 insertions(+), 14 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index 9f45f6a91d..aeb0a8921e 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -1741,7 +1741,8 @@ err_block_for_wrid: * containing some data and block until the post completes. */ static int qemu_rdma_post_send_control(RDMAContext *rdma, uint8_t *buf, - RDMAControlHeader *head) + RDMAControlHeader *head, + Error **errp) { int ret; RDMAWorkRequestData *wr = &rdma->wr_data[RDMA_WRID_CONTROL]; @@ -1781,13 +1782,13 @@ static int qemu_rdma_post_send_control(RDMAContext *rdma, uint8_t *buf, ret = ibv_post_send(rdma->qp, &send_wr, &bad_wr); if (ret > 0) { - error_report("Failed to use post IB SEND for control"); + error_setg(errp, "Failed to use post IB SEND for control"); return -1; } ret = qemu_rdma_block_for_wrid(rdma, RDMA_WRID_SEND_CONTROL, NULL); if (ret < 0) { - error_report("rdma migration: send polling control error"); + error_setg(errp, "rdma migration: send polling control error"); return -1; } @@ -1945,10 +1946,9 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head, /* * Deliver the control message that was requested. */ - ret = qemu_rdma_post_send_control(rdma, data, head); + ret = qemu_rdma_post_send_control(rdma, data, head, errp); if (ret < 0) { - error_setg(errp, "Failed to send control buffer!"); return -1; } @@ -2002,10 +2002,9 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head, /* * Inform the source that we're ready to receive a message. */ - ret = qemu_rdma_post_send_control(rdma, NULL, &ready); + ret = qemu_rdma_post_send_control(rdma, NULL, &ready, errp); if (ret < 0) { - error_setg(errp, "Failed to send control buffer!"); return -1; } @@ -2394,6 +2393,7 @@ static int qemu_rdma_write(RDMAContext *rdma, static void qemu_rdma_cleanup(RDMAContext *rdma) { + Error *err = NULL; int idx; if (rdma->cm_id && rdma->connected) { @@ -2405,7 +2405,9 @@ static void qemu_rdma_cleanup(RDMAContext *rdma) .repeat = 1, }; error_report("Early error. Sending error."); - qemu_rdma_post_send_control(rdma, NULL, &head); + if (qemu_rdma_post_send_control(rdma, NULL, &head, &err) < 0) { + error_report_err(err); + } } rdma_disconnect(rdma->cm_id); @@ -3705,10 +3707,11 @@ static int qemu_rdma_registration_handle(QEMUFile *f) ret = qemu_rdma_post_send_control(rdma, - (uint8_t *) rdma->dest_blocks, &blocks); + (uint8_t *) rdma->dest_blocks, &blocks, + &err); if (ret < 0) { - error_report("rdma migration: error sending remote info"); + error_report_err(err); goto err; } @@ -3783,10 +3786,10 @@ static int qemu_rdma_registration_handle(QEMUFile *f) } ret = qemu_rdma_post_send_control(rdma, - (uint8_t *) results, ®_resp); + (uint8_t *) results, ®_resp, &err); if (ret < 0) { - error_report("Failed to send control buffer"); + error_report_err(err); goto err; } break; @@ -3818,10 +3821,10 @@ static int qemu_rdma_registration_handle(QEMUFile *f) reg->key.chunk); } - ret = qemu_rdma_post_send_control(rdma, NULL, &unreg_resp); + ret = qemu_rdma_post_send_control(rdma, NULL, &unreg_resp, &err); if (ret < 0) { - error_report("Failed to send control buffer"); + error_report_err(err); goto err; } break;