From de1aa35f8dbb9666360648148e57ceacb1bf8b5b Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 28 Sep 2023 15:20:04 +0200 Subject: [PATCH] migration/rdma: Convert qemu_rdma_reg_whole_ram_blocks() 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 callback qemu_rdma_reg_whole_ram_blocks(). I elected not to investigate how callers handle the error, i.e. precise impact is not known. Clean this up by converting the callback to Error. Signed-off-by: Markus Armbruster Reviewed-by: Li Zhijian Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Message-ID: <20230928132019.2544702-39-armbru@redhat.com> --- migration/rdma.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index 87f2e6129e..189932097e 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -518,7 +518,8 @@ static void network_to_result(RDMARegisterResult *result) static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head, uint8_t *data, RDMAControlHeader *resp, int *resp_idx, - int (*callback)(RDMAContext *rdma), + int (*callback)(RDMAContext *rdma, + Error **errp), Error **errp); static inline uint64_t ram_chunk_index(const uint8_t *start, @@ -1177,7 +1178,7 @@ static void qemu_rdma_advise_prefetch_mr(struct ibv_pd *pd, uint64_t addr, #endif } -static int qemu_rdma_reg_whole_ram_blocks(RDMAContext *rdma) +static int qemu_rdma_reg_whole_ram_blocks(RDMAContext *rdma, Error **errp) { int i; RDMALocalBlocks *local = &rdma->local_ram_blocks; @@ -1217,16 +1218,16 @@ static int qemu_rdma_reg_whole_ram_blocks(RDMAContext *rdma) } if (!local->block[i].mr) { - perror("Failed to register local dest ram block!"); - break; + error_setg_errno(errp, errno, + "Failed to register local dest ram block!"); + goto err; } rdma->total_registrations++; } - if (i >= local->nb_blocks) { - return 0; - } + return 0; +err: for (i--; i >= 0; i--) { ibv_dereg_mr(local->block[i].mr); local->block[i].mr = NULL; @@ -1899,7 +1900,8 @@ static void qemu_rdma_move_header(RDMAContext *rdma, int idx, static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head, uint8_t *data, RDMAControlHeader *resp, int *resp_idx, - int (*callback)(RDMAContext *rdma), + int (*callback)(RDMAContext *rdma, + Error **errp), Error **errp) { int ret; @@ -1956,9 +1958,8 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head, if (resp) { if (callback) { trace_qemu_rdma_exchange_send_issue_callback(); - ret = callback(rdma); + ret = callback(rdma, errp); if (ret < 0) { - error_setg(errp, "FIXME temporary error message"); return -1; } } @@ -3671,10 +3672,9 @@ static int qemu_rdma_registration_handle(QEMUFile *f) } if (rdma->pin_all) { - ret = qemu_rdma_reg_whole_ram_blocks(rdma); + ret = qemu_rdma_reg_whole_ram_blocks(rdma, &err); if (ret < 0) { - error_report("rdma migration: error dest " - "registering ram blocks"); + error_report_err(err); goto err; } } -- 2.11.4.GIT