From patchwork Mon May 2 21:59:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 12834822 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75D72C433FE for ; Mon, 2 May 2022 22:01:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236282AbiEBWEu (ORCPT ); Mon, 2 May 2022 18:04:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1387787AbiEBWDe (ORCPT ); Mon, 2 May 2022 18:03:34 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B27E63E2 for ; Mon, 2 May 2022 15:00:02 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id C3B8821871; Mon, 2 May 2022 22:00:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1651528800; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oaYkaHQDZ8j7a2GaEIivTlEZ1S9GHfFygXTag9RBGJQ=; b=x4Wu0TMFwsuBXO8ojIhj2bNRqHywgXCOOtqfrhsccpWbBFCsVQ68lSfoBcFvPGFa30U/yf FHBmAicuwFYy5GTYVhManvQIVW9g4ND/7P6MLZB4r+K4GQLYfopWdOP4YRS7eZx6Gb24IO e3VoJ2Z/5cJ7CEAXHYQd1wfGSpJtwyI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1651528800; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oaYkaHQDZ8j7a2GaEIivTlEZ1S9GHfFygXTag9RBGJQ=; b=EASz5C3iJTL8hsxn9lJ3zcSTgbsW/0xlthTXk2nXx7nfjDhksqUpawMW/b4FlniYlP2GlO Gkb0Br8E/sUvMQBQ== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id BD7392C15A; Mon, 2 May 2022 22:00:00 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id BB2E15194154; Tue, 3 May 2022 00:00:00 +0200 (CEST) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke Subject: [PATCH 5/7] scsi: Do not allocate scsi command in scsi_ioctl_reset() Date: Mon, 2 May 2022 23:59:45 +0200 Message-Id: <20220502215953.5463-11-hare@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20220502215953.5463-1-hare@suse.de> References: <20220502215953.5463-1-hare@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org As we now have moved the error handler functions to not rely on a scsi command we can drop the out-of-band scsi command allocation from scsi_ioctl_reset(). Signed-off-by: Hannes Reinecke --- drivers/scsi/scsi_error.c | 119 +++++++++++++++++--------------------- 1 file changed, 54 insertions(+), 65 deletions(-) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 93f7006982d8..ad68149ab8a1 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -824,16 +824,22 @@ void scsi_eh_done(struct scsi_cmnd *scmd) complete(eh_action); } +static void __scsi_report_device_reset(struct scsi_device *sdev) +{ + sdev->was_reset = 1; + sdev->expecting_cc_ua = 1; +} + /** * scsi_try_host_reset - ask host adapter to reset itself - * @scmd: SCSI cmd to send host reset. + * @host: SCSI host to be reset. */ -static enum scsi_disposition scsi_try_host_reset(struct scsi_cmnd *scmd) +static enum scsi_disposition scsi_try_host_reset(struct Scsi_Host *host) { unsigned long flags; enum scsi_disposition rtn; - struct Scsi_Host *host = scmd->device->host; struct scsi_host_template *hostt = host->hostt; + struct scsi_device *sdev; SCSI_LOG_ERROR_RECOVERY(3, shost_printk(KERN_INFO, host, "Snd Host RST\n")); @@ -847,7 +853,8 @@ static enum scsi_disposition scsi_try_host_reset(struct scsi_cmnd *scmd) if (!hostt->skip_settle_delay) ssleep(HOST_RESET_SETTLE_TIME); spin_lock_irqsave(host->host_lock, flags); - scsi_report_bus_reset(host, scmd_channel(scmd)); + __shost_for_each_device(sdev, host) + __scsi_report_device_reset(sdev); spin_unlock_irqrestore(host->host_lock, flags); } @@ -856,43 +863,39 @@ static enum scsi_disposition scsi_try_host_reset(struct scsi_cmnd *scmd) /** * scsi_try_bus_reset - ask host to perform a bus reset - * @scmd: SCSI cmd to send bus reset. + * @host: SCSI host to send bus reset. + * @channel: Number of the bus to be reset */ -static enum scsi_disposition scsi_try_bus_reset(struct scsi_cmnd *scmd) +static enum scsi_disposition scsi_try_bus_reset(struct Scsi_Host *host, + int channel) { unsigned long flags; enum scsi_disposition rtn; - struct Scsi_Host *host = scmd->device->host; struct scsi_host_template *hostt = host->hostt; - SCSI_LOG_ERROR_RECOVERY(3, scmd_printk(KERN_INFO, scmd, - "%s: Snd Bus RST\n", __func__)); + SCSI_LOG_ERROR_RECOVERY(3, shost_printk(KERN_INFO, host, + "%s: Snd Bus RST to bus %d\n", __func__, channel)); if (!hostt->eh_bus_reset_handler) return FAILED; - rtn = hostt->eh_bus_reset_handler(host, scmd_channel(scmd)); + rtn = hostt->eh_bus_reset_handler(host, channel); if (rtn == SUCCESS) { if (!hostt->skip_settle_delay) ssleep(BUS_RESET_SETTLE_TIME); spin_lock_irqsave(host->host_lock, flags); - scsi_report_bus_reset(host, scmd_channel(scmd)); + scsi_report_bus_reset(host, channel); spin_unlock_irqrestore(host->host_lock, flags); } return rtn; } -static void __scsi_report_device_reset(struct scsi_device *sdev, void *data) -{ - sdev->was_reset = 1; - sdev->expecting_cc_ua = 1; -} - /** * scsi_try_target_reset - Ask host to perform a target reset - * @scmd: SCSI cmd used to send a target reset + * @host: SCSI Host + * @starget: SCSI target to be reset * * Notes: * There is no timeout for this operation. if this operation is @@ -900,13 +903,13 @@ static void __scsi_report_device_reset(struct scsi_device *sdev, void *data) * timer on it, and set the host back to a consistent state prior to * returning. */ -static enum scsi_disposition scsi_try_target_reset(struct scsi_cmnd *scmd) +static enum scsi_disposition scsi_try_target_reset(struct Scsi_Host *host, + struct scsi_target *starget) { unsigned long flags; enum scsi_disposition rtn; - struct Scsi_Host *host = scmd->device->host; + struct scsi_device *sdev; struct scsi_host_template *hostt = host->hostt; - struct scsi_target *starget = scsi_target(scmd->device); if (!hostt->eh_target_reset_handler) return FAILED; @@ -914,8 +917,11 @@ static enum scsi_disposition scsi_try_target_reset(struct scsi_cmnd *scmd) rtn = hostt->eh_target_reset_handler(starget); if (rtn == SUCCESS) { spin_lock_irqsave(host->host_lock, flags); - __starget_for_each_device(starget, NULL, - __scsi_report_device_reset); + __shost_for_each_device(sdev, host) { + if ((sdev->channel == starget->channel) && + (sdev->id == starget->id)) + __scsi_report_device_reset(sdev); + } spin_unlock_irqrestore(host->host_lock, flags); } @@ -924,7 +930,7 @@ static enum scsi_disposition scsi_try_target_reset(struct scsi_cmnd *scmd) /** * scsi_try_bus_device_reset - Ask host to perform a BDR on a dev - * @scmd: SCSI cmd used to send BDR + * @sdev: SCSI device to perform the BDR on * * Notes: * There is no timeout for this operation. if this operation is @@ -932,17 +938,17 @@ static enum scsi_disposition scsi_try_target_reset(struct scsi_cmnd *scmd) * timer on it, and set the host back to a consistent state prior to * returning. */ -static enum scsi_disposition scsi_try_bus_device_reset(struct scsi_cmnd *scmd) +static enum scsi_disposition scsi_try_bus_device_reset(struct scsi_device *sdev) { enum scsi_disposition rtn; - struct scsi_host_template *hostt = scmd->device->host->hostt; + struct scsi_host_template *hostt = sdev->host->hostt; if (!hostt->eh_device_reset_handler) return FAILED; - rtn = hostt->eh_device_reset_handler(scmd->device); + rtn = hostt->eh_device_reset_handler(sdev); if (rtn == SUCCESS) - __scsi_report_device_reset(scmd->device, NULL); + __scsi_report_device_reset(sdev); return rtn; } @@ -974,11 +980,15 @@ scsi_try_to_abort_cmd(struct scsi_host_template *hostt, struct scsi_cmnd *scmd) static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd) { - if (scsi_try_to_abort_cmd(scmd->device->host->hostt, scmd) != SUCCESS) - if (scsi_try_bus_device_reset(scmd) != SUCCESS) - if (scsi_try_target_reset(scmd) != SUCCESS) - if (scsi_try_bus_reset(scmd) != SUCCESS) - scsi_try_host_reset(scmd); + struct Scsi_Host *host = scmd->device->host; + struct scsi_target *starget = scsi_target(scmd->device); + int channel = scmd->device->channel; + + if (scsi_try_to_abort_cmd(host->hostt, scmd) != SUCCESS) + if (scsi_try_bus_device_reset(scmd->device) != SUCCESS) + if (scsi_try_target_reset(host, starget) != SUCCESS) + if (scsi_try_bus_reset(host, channel) != SUCCESS) + scsi_try_host_reset(host); } /** @@ -1561,7 +1571,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, SCSI_LOG_ERROR_RECOVERY(3, sdev_printk(KERN_INFO, sdev, "%s: Sending BDR\n", current->comm)); - rtn = scsi_try_bus_device_reset(bdr_scmd); + rtn = scsi_try_bus_device_reset(sdev); if (rtn == SUCCESS || rtn == FAST_IO_FAIL) { if (!scsi_device_online(sdev) || rtn == FAST_IO_FAIL || @@ -1626,7 +1636,7 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost, shost_printk(KERN_INFO, shost, "%s: Sending target reset to target %d\n", current->comm, id)); - rtn = scsi_try_target_reset(scmd); + rtn = scsi_try_target_reset(shost, scsi_target(scmd->device)); if (rtn != SUCCESS && rtn != FAST_IO_FAIL) SCSI_LOG_ERROR_RECOVERY(3, shost_printk(KERN_INFO, shost, @@ -1701,7 +1711,7 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost, shost_printk(KERN_INFO, shost, "%s: Sending BRST chan: %d\n", current->comm, channel)); - rtn = scsi_try_bus_reset(chan_scmd); + rtn = scsi_try_bus_reset(shost, channel); if (rtn == SUCCESS || rtn == FAST_IO_FAIL) { list_for_each_entry_safe(scmd, next, work_q, eh_entry) { if (channel == scmd_channel(scmd)) { @@ -1747,7 +1757,7 @@ static int scsi_eh_host_reset(struct Scsi_Host *shost, "%s: Sending HRST\n", current->comm)); - rtn = scsi_try_host_reset(scmd); + rtn = scsi_try_host_reset(shost); if (rtn == SUCCESS) { list_splice_init(work_q, &check_list); } else if (rtn == FAST_IO_FAIL) { @@ -2342,7 +2352,7 @@ void scsi_report_bus_reset(struct Scsi_Host *shost, int channel) __shost_for_each_device(sdev, shost) { if (channel == sdev_channel(sdev)) - __scsi_report_device_reset(sdev, NULL); + __scsi_report_device_reset(sdev); } } EXPORT_SYMBOL(scsi_report_bus_reset); @@ -2376,7 +2386,7 @@ void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target) __shost_for_each_device(sdev, shost) { if (channel == sdev_channel(sdev) && target == sdev_id(sdev)) - __scsi_report_device_reset(sdev, NULL); + __scsi_report_device_reset(sdev); } } EXPORT_SYMBOL(scsi_report_device_reset); @@ -2389,9 +2399,8 @@ EXPORT_SYMBOL(scsi_report_device_reset); int scsi_ioctl_reset(struct scsi_device *dev, int __user *arg) { - struct scsi_cmnd *scmd; struct Scsi_Host *shost = dev->host; - struct request *rq; + struct scsi_target *starget = scsi_target(dev); unsigned long flags; int error = 0, val; enum scsi_disposition rtn; @@ -2406,23 +2415,6 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg) if (scsi_autopm_get_host(shost) < 0) return -EIO; - error = -EIO; - rq = kzalloc(sizeof(struct request) + sizeof(struct scsi_cmnd) + - shost->hostt->cmd_size, GFP_KERNEL); - if (!rq) - goto out_put_autopm_host; - blk_rq_init(NULL, rq); - - scmd = (struct scsi_cmnd *)(rq + 1); - scsi_init_command(dev, scmd); - - scmd->submitter = SUBMITTED_BY_SCSI_RESET_IOCTL; - memset(&scmd->sdb, 0, sizeof(scmd->sdb)); - - scmd->cmd_len = 0; - - scmd->sc_data_direction = DMA_BIDIRECTIONAL; - spin_lock_irqsave(shost->host_lock, flags); shost->tmf_in_progress = 1; spin_unlock_irqrestore(shost->host_lock, flags); @@ -2432,22 +2424,22 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg) rtn = SUCCESS; break; case SG_SCSI_RESET_DEVICE: - rtn = scsi_try_bus_device_reset(scmd); + rtn = scsi_try_bus_device_reset(dev); if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE)) break; fallthrough; case SG_SCSI_RESET_TARGET: - rtn = scsi_try_target_reset(scmd); + rtn = scsi_try_target_reset(shost, starget); if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE)) break; fallthrough; case SG_SCSI_RESET_BUS: - rtn = scsi_try_bus_reset(scmd); + rtn = scsi_try_bus_reset(shost, dev->channel); if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE)) break; fallthrough; case SG_SCSI_RESET_HOST: - rtn = scsi_try_host_reset(scmd); + rtn = scsi_try_host_reset(shost); if (rtn == SUCCESS) break; fallthrough; @@ -2473,9 +2465,6 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg) wake_up(&shost->host_wait); scsi_run_host_queues(shost); - kfree(rq); - -out_put_autopm_host: scsi_autopm_put_host(shost); return error; }