From patchwork Tue Oct 27 14:17:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 301820 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E579C55179 for ; Tue, 27 Oct 2020 14:51:21 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 36BE221556 for ; Tue, 27 Oct 2020 14:51:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="ErQp/ru1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36BE221556 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59680 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kXQJi-0000vE-Nx for qemu-devel@archiver.kernel.org; Tue, 27 Oct 2020 10:51:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42610) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kXPnj-0002J8-SI; Tue, 27 Oct 2020 10:18:17 -0400 Received: from ozlabs.org ([203.11.71.1]:40093) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kXPnh-0007d7-0v; Tue, 27 Oct 2020 10:18:15 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 4CLDLt1Qt0z9sj3; Wed, 28 Oct 2020 01:17:57 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1603808278; bh=iYQRi/tNG112bmgF4xqQ7eKKIeFdgRePVgkns9RLLKU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ErQp/ru1Of/fHE4PD6Xv4YL2DI33SJhLg7Jc2WQsqNnnaMDKp1QfdNRGxw9lNzU7O LaB+8gob81bBNVqjmQFIOVVwkCkfPilbnsvx8Nb+0L36LDtHrV7RiS8U5b46Ovfu3r kHAx3VBIL+RGbcYrof6b0VmdNIjuvoUKJM/RENEU= From: David Gibson To: peter.maydell@linaro.org Subject: [PULL 16/18] target/ppc: Fix kvmppc_load_htab_chunk() error reporting Date: Wed, 28 Oct 2020 01:17:33 +1100 Message-Id: <20201027141735.728821-17-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201027141735.728821-1-david@gibson.dropbear.id.au> References: <20201027141735.728821-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Received-SPF: pass client-ip=203.11.71.1; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/27 10:17:43 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, groug@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Greg Kurz If kvmppc_load_htab_chunk() fails, its return value is propagated up to vmstate_load(). It should thus be a negative errno, not -1 (which maps to EPERM and would lure the user into thinking that the problem is necessarily related to a lack of privilege). Return the error reported by KVM or ENOSPC in case of short write. While here, propagate the error message through an @errp argument and have the caller to print it with error_report_err() instead of relying on fprintf(). Signed-off-by: Greg Kurz Message-Id: <160371604713.305923.5264900354159029580.stgit@bahia.lan> Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: David Gibson --- hw/ppc/spapr.c | 4 +++- target/ppc/kvm.c | 11 +++++------ target/ppc/kvm_ppc.h | 5 +++-- 3 files changed, 11 insertions(+), 9 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index ba0894e73a..ec2536dba1 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2347,8 +2347,10 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) assert(fd >= 0); - rc = kvmppc_load_htab_chunk(f, fd, index, n_valid, n_invalid); + rc = kvmppc_load_htab_chunk(f, fd, index, n_valid, n_invalid, + &local_err); if (rc < 0) { + error_report_err(local_err); return rc; } } diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index d85ba8ffe0..0223b93ea5 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -2683,7 +2683,7 @@ int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns) } int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, - uint16_t n_valid, uint16_t n_invalid) + uint16_t n_valid, uint16_t n_invalid, Error **errp) { struct kvm_get_htab_header *buf; size_t chunksize = sizeof(*buf) + n_valid * HASH_PTE_SIZE_64; @@ -2698,14 +2698,13 @@ int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, rc = write(fd, buf, chunksize); if (rc < 0) { - fprintf(stderr, "Error writing KVM hash table: %s\n", - strerror(errno)); - return rc; + error_setg_errno(errp, errno, "Error writing the KVM hash table"); + return -errno; } if (rc != chunksize) { /* We should never get a short write on a single chunk */ - fprintf(stderr, "Short write, restoring KVM hash table\n"); - return -1; + error_setg(errp, "Short write while restoring the KVM hash table"); + return -ENOSPC; } return 0; } diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h index 72e05f1cd2..73ce2bc951 100644 --- a/target/ppc/kvm_ppc.h +++ b/target/ppc/kvm_ppc.h @@ -56,7 +56,7 @@ int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function); int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp); int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns); int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, - uint16_t n_valid, uint16_t n_invalid); + uint16_t n_valid, uint16_t n_invalid, Error **errp); void kvmppc_read_hptes(ppc_hash_pte64_t *hptes, hwaddr ptex, int n); void kvmppc_write_hpte(hwaddr ptex, uint64_t pte0, uint64_t pte1); bool kvmppc_has_cap_fixup_hcalls(void); @@ -316,7 +316,8 @@ static inline int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, } static inline int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, - uint16_t n_valid, uint16_t n_invalid) + uint16_t n_valid, uint16_t n_invalid, + Error **errp) { abort(); }