From patchwork Mon Nov 16 18:31:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 11910485 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 013C31398 for ; Mon, 16 Nov 2020 18:51:44 +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 C493520575 for ; Mon, 16 Nov 2020 18:51:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C493520575 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:40918 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kejbK-0007o0-PQ for patchwork-qemu-devel@patchwork.kernel.org; Mon, 16 Nov 2020 13:51:42 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:37594) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kejHj-0003UV-B7 for qemu-devel@nongnu.org; Mon, 16 Nov 2020 13:31:27 -0500 Received: from mx2.suse.de ([195.135.220.15]:34662) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kejHa-0006BI-RP for qemu-devel@nongnu.org; Mon, 16 Nov 2020 13:31:26 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id D9774B062; Mon, 16 Nov 2020 18:31:15 +0000 (UTC) From: Hannes Reinecke To: Paolo Bonzini Subject: [PATCH 2/3] scsi: make io_timeout configurable Date: Mon, 16 Nov 2020 19:31:13 +0100 Message-Id: <20201116183114.55703-3-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20201116183114.55703-1-hare@suse.de> References: <20201116183114.55703-1-hare@suse.de> Received-SPF: pass client-ip=195.135.220.15; envelope-from=hare@suse.de; helo=mx2.suse.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/16 12:53:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x (no timestamps) [generic] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, Hannes Reinecke Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" The current code sets an infinite timeout on SG_IO requests, causing the guest to stall if the host experiences a frame loss. This patch adds an 'io_timeout' parameter for SCSIDevice to make the SG_IO timeout configurable, and also shortens the default timeout to 30 seconds to avoid infinite stalls. Signed-off-by: Hannes Reinecke --- hw/scsi/scsi-disk.c | 6 ++++-- hw/scsi/scsi-generic.c | 17 +++++++++++------ include/hw/scsi/scsi.h | 4 +++- 3 files changed, 18 insertions(+), 9 deletions(-) diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index e859534eaf..2959526b52 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -2604,7 +2604,7 @@ static int get_device_type(SCSIDiskState *s) cmd[4] = sizeof(buf); ret = scsi_SG_IO_FROM_DEV(s->qdev.conf.blk, cmd, sizeof(cmd), - buf, sizeof(buf)); + buf, sizeof(buf), s->qdev.io_timeout); if (ret < 0) { return -1; } @@ -2765,7 +2765,7 @@ static BlockAIOCB *scsi_block_do_sgio(SCSIBlockReq *req, /* The rest is as in scsi-generic.c. */ io_header->mx_sb_len = sizeof(r->req.sense); io_header->sbp = r->req.sense; - io_header->timeout = UINT_MAX; + io_header->timeout = s->qdev.io_timeout * 1000; io_header->usr_ptr = r; io_header->flags |= SG_FLAG_DIRECT_IO; @@ -3083,6 +3083,8 @@ static Property scsi_block_properties[] = { DEFAULT_MAX_IO_SIZE), DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, -1), + DEFINE_PROP_UINT32("io_timeout", SCSIDiskState, qdev.io_timeout, + DEFAULT_IO_TIMEOUT), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c index 2cb23ca891..e07924b3d7 100644 --- a/hw/scsi/scsi-generic.c +++ b/hw/scsi/scsi-generic.c @@ -114,6 +114,8 @@ static int execute_command(BlockBackend *blk, SCSIGenericReq *r, int direction, BlockCompletionFunc *complete) { + SCSIDevice *s = r->req.dev; + r->io_header.interface_id = 'S'; r->io_header.dxfer_direction = direction; r->io_header.dxferp = r->buf; @@ -122,7 +124,7 @@ static int execute_command(BlockBackend *blk, r->io_header.cmd_len = r->req.cmd.len; r->io_header.mx_sb_len = sizeof(r->req.sense); r->io_header.sbp = r->req.sense; - r->io_header.timeout = MAX_UINT; + r->io_header.timeout = s->io_timeout * 1000; r->io_header.usr_ptr = r; r->io_header.flags |= SG_FLAG_DIRECT_IO; @@ -505,7 +507,7 @@ static int read_naa_id(const uint8_t *p, uint64_t *p_wwn) } int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size, - uint8_t *buf, uint8_t buf_size) + uint8_t *buf, uint8_t buf_size, uint32_t timeout) { sg_io_hdr_t io_header; uint8_t sensebuf[8]; @@ -520,7 +522,7 @@ int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size, io_header.cmd_len = cmd_size; io_header.mx_sb_len = sizeof(sensebuf); io_header.sbp = sensebuf; - io_header.timeout = 6000; /* XXX */ + io_header.timeout = timeout * 1000; ret = blk_ioctl(blk, SG_IO, &io_header); if (ret < 0 || io_header.driver_status || io_header.host_status) { @@ -550,7 +552,7 @@ static void scsi_generic_set_vpd_bl_emulation(SCSIDevice *s) cmd[4] = sizeof(buf); ret = scsi_SG_IO_FROM_DEV(s->conf.blk, cmd, sizeof(cmd), - buf, sizeof(buf)); + buf, sizeof(buf), s->io_timeout); if (ret < 0) { /* * Do not assume anything if we can't retrieve the @@ -586,7 +588,7 @@ static void scsi_generic_read_device_identification(SCSIDevice *s) cmd[4] = sizeof(buf); ret = scsi_SG_IO_FROM_DEV(s->conf.blk, cmd, sizeof(cmd), - buf, sizeof(buf)); + buf, sizeof(buf), s->io_timeout); if (ret < 0) { return; } @@ -637,7 +639,7 @@ static int get_stream_blocksize(BlockBackend *blk) cmd[0] = MODE_SENSE; cmd[4] = sizeof(buf); - ret = scsi_SG_IO_FROM_DEV(blk, cmd, sizeof(cmd), buf, sizeof(buf)); + ret = scsi_SG_IO_FROM_DEV(blk, cmd, sizeof(cmd), buf, sizeof(buf), 6); if (ret < 0) { return -1; } @@ -727,6 +729,7 @@ static void scsi_generic_realize(SCSIDevice *s, Error **errp) /* Only used by scsi-block, but initialize it nevertheless to be clean. */ s->default_scsi_version = -1; + s->io_timeout = DEFAULT_IO_TIMEOUT; scsi_generic_read_device_inquiry(s); } @@ -750,6 +753,8 @@ static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun, static Property scsi_generic_properties[] = { DEFINE_PROP_DRIVE("drive", SCSIDevice, conf.blk), DEFINE_PROP_BOOL("share-rw", SCSIDevice, conf.share_rw, false), + DEFINE_PROP_UINT32("io_timeout", SCSIDevice, io_timeout, + DEFAULT_IO_TIMEOUT), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h index 7a55cdbd74..21a6249743 100644 --- a/include/hw/scsi/scsi.h +++ b/include/hw/scsi/scsi.h @@ -18,6 +18,7 @@ typedef struct SCSIReqOps SCSIReqOps; #define SCSI_SENSE_BUF_SIZE_OLD 96 #define SCSI_SENSE_BUF_SIZE 252 +#define DEFAULT_IO_TIMEOUT 30 struct SCSIRequest { SCSIBus *bus; @@ -84,6 +85,7 @@ struct SCSIDevice uint64_t port_wwn; int scsi_version; int default_scsi_version; + uint32_t io_timeout; bool needs_vpd_bl_emulation; bool hba_supports_iothread; }; @@ -188,7 +190,7 @@ void scsi_device_unit_attention_reported(SCSIDevice *dev); void scsi_generic_read_device_inquiry(SCSIDevice *dev); int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed); int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size, - uint8_t *buf, uint8_t buf_size); + uint8_t *buf, uint8_t buf_size, uint32_t timeout); SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun); /* scsi-generic.c. */