From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 4DA1FC4363A for ; Tue, 27 Oct 2020 00:01:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1637620773 for ; Tue, 27 Oct 2020 00:01:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756887; bh=AoVGMYSYNNDsixj9REKeSZPdJlCOTT/kbriVNvv8dB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kzccd0j1pySRtpBEenxwwT10VAF/Ah8wmLeoxQaW+ee7k3/j2U01xV4Hc2DrsQdH6 xqa7Ylo2aN2FlQQ7wPLjRdlUQENq88tmRmqPxg7CTVvUKyagQLn0mSCM84htV/iatZ zMFKD8EeLQQ9VTVlk+oP8mwq+j5YULqD7tq+jPSI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2411143AbgJZX41 (ORCPT ); Mon, 26 Oct 2020 19:56:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:60314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410436AbgJZXy0 (ORCPT ); Mon, 26 Oct 2020 19:54:26 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F185921D7B; Mon, 26 Oct 2020 23:54:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756465; bh=AoVGMYSYNNDsixj9REKeSZPdJlCOTT/kbriVNvv8dB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U4eiX0qaLwmN+vgk76L+9js6xEEKWKkh/ypNudZHbbmHrPKeL4CBC+w/ohcGiQ+jf Y6LNafR19/zRMILnJuMkdW5WFxg+51DYux0FydPDVRD5/BI1Zw/80D4yjqbf4bNT0b 2CaIiTiKUpZE/pc9sAXgeVvl6Hg8qGyTlDwBNtZA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christoph Hellwig , Hannes Reinecke , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.8 113/132] scsi: core: Clean up allocation and freeing of sgtables Date: Mon, 26 Oct 2020 19:51:45 -0400 Message-Id: <20201026235205.1023962-113-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201026235205.1023962-1-sashal@kernel.org> References: <20201026235205.1023962-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christoph Hellwig [ Upstream commit 7007e9dd56767a95de0947b3f7599bcc2f21687f ] Rename scsi_init_io() to scsi_alloc_sgtables(), and ensure callers call scsi_free_sgtables() to cleanup failures close to scsi_init_io() instead of leaking it down the generic I/O submission path. Link: https://lore.kernel.org/r/20201005084130.143273-9-hch@lst.de Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/scsi_lib.c | 22 ++++++++-------------- drivers/scsi/sd.c | 27 +++++++++++++++------------ drivers/scsi/sr.c | 16 ++++++---------- include/scsi/scsi_cmnd.h | 3 ++- 4 files changed, 31 insertions(+), 37 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index ae620dada8ce5..ba8fafd24f4bd 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -531,7 +531,7 @@ static void scsi_uninit_cmd(struct scsi_cmnd *cmd) } } -static void scsi_free_sgtables(struct scsi_cmnd *cmd) +void scsi_free_sgtables(struct scsi_cmnd *cmd) { if (cmd->sdb.table.nents) sg_free_table_chained(&cmd->sdb.table, @@ -540,6 +540,7 @@ static void scsi_free_sgtables(struct scsi_cmnd *cmd) sg_free_table_chained(&cmd->prot_sdb->table, SCSI_INLINE_PROT_SG_CNT); } +EXPORT_SYMBOL_GPL(scsi_free_sgtables); static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd) { @@ -967,7 +968,7 @@ static inline bool scsi_cmd_needs_dma_drain(struct scsi_device *sdev, } /** - * scsi_init_io - SCSI I/O initialization function. + * scsi_alloc_sgtables - allocate S/G tables for a command * @cmd: command descriptor we wish to initialize * * Returns: @@ -975,7 +976,7 @@ static inline bool scsi_cmd_needs_dma_drain(struct scsi_device *sdev, * * BLK_STS_RESOURCE - if the failure is retryable * * BLK_STS_IOERR - if the failure is fatal */ -blk_status_t scsi_init_io(struct scsi_cmnd *cmd) +blk_status_t scsi_alloc_sgtables(struct scsi_cmnd *cmd) { struct scsi_device *sdev = cmd->device; struct request *rq = cmd->request; @@ -1067,7 +1068,7 @@ blk_status_t scsi_init_io(struct scsi_cmnd *cmd) scsi_free_sgtables(cmd); return ret; } -EXPORT_SYMBOL(scsi_init_io); +EXPORT_SYMBOL(scsi_alloc_sgtables); /** * scsi_initialize_rq - initialize struct scsi_cmnd partially @@ -1155,7 +1156,7 @@ static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev, * submit a request without an attached bio. */ if (req->bio) { - blk_status_t ret = scsi_init_io(cmd); + blk_status_t ret = scsi_alloc_sgtables(cmd); if (unlikely(ret != BLK_STS_OK)) return ret; } else { @@ -1195,7 +1196,6 @@ static blk_status_t scsi_setup_cmnd(struct scsi_device *sdev, struct request *req) { struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req); - blk_status_t ret; if (!blk_rq_bytes(req)) cmd->sc_data_direction = DMA_NONE; @@ -1205,14 +1205,8 @@ static blk_status_t scsi_setup_cmnd(struct scsi_device *sdev, cmd->sc_data_direction = DMA_FROM_DEVICE; if (blk_rq_is_scsi(req)) - ret = scsi_setup_scsi_cmnd(sdev, req); - else - ret = scsi_setup_fs_cmnd(sdev, req); - - if (ret != BLK_STS_OK) - scsi_free_sgtables(cmd); - - return ret; + return scsi_setup_scsi_cmnd(sdev, req); + return scsi_setup_fs_cmnd(sdev, req); } static blk_status_t diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 4b2117cb84837..c0c422ad305bc 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -866,7 +866,7 @@ static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) cmd->transfersize = data_len; rq->timeout = SD_TIMEOUT; - return scsi_init_io(cmd); + return scsi_alloc_sgtables(cmd); } static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, @@ -897,7 +897,7 @@ static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, cmd->transfersize = data_len; rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; - return scsi_init_io(cmd); + return scsi_alloc_sgtables(cmd); } static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, @@ -928,7 +928,7 @@ static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, cmd->transfersize = data_len; rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; - return scsi_init_io(cmd); + return scsi_alloc_sgtables(cmd); } static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) @@ -1069,7 +1069,7 @@ static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) * knows how much to actually write. */ rq->__data_len = sdp->sector_size; - ret = scsi_init_io(cmd); + ret = scsi_alloc_sgtables(cmd); rq->__data_len = blk_rq_bytes(rq); return ret; @@ -1187,23 +1187,24 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) unsigned int dif; bool dix; - ret = scsi_init_io(cmd); + ret = scsi_alloc_sgtables(cmd); if (ret != BLK_STS_OK) return ret; + ret = BLK_STS_IOERR; if (!scsi_device_online(sdp) || sdp->changed) { scmd_printk(KERN_ERR, cmd, "device offline or changed\n"); - return BLK_STS_IOERR; + goto fail; } if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) { scmd_printk(KERN_ERR, cmd, "access beyond end of device\n"); - return BLK_STS_IOERR; + goto fail; } if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n"); - return BLK_STS_IOERR; + goto fail; } /* @@ -1225,7 +1226,7 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) if (req_op(rq) == REQ_OP_ZONE_APPEND) { ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks); if (ret) - return ret; + goto fail; } fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; @@ -1253,7 +1254,7 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) } if (unlikely(ret != BLK_STS_OK)) - return ret; + goto fail; /* * We shouldn't disconnect in the middle of a sector, so with a dumb @@ -1277,10 +1278,12 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) blk_rq_sectors(rq))); /* - * This indicates that the command is ready from our end to be - * queued. + * This indicates that the command is ready from our end to be queued. */ return BLK_STS_OK; +fail: + scsi_free_sgtables(cmd); + return ret; } static blk_status_t sd_init_command(struct scsi_cmnd *cmd) diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 0c4aa4665a2f9..b74dfd8dc1165 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -392,15 +392,11 @@ static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt) struct request *rq = SCpnt->request; blk_status_t ret; - ret = scsi_init_io(SCpnt); + ret = scsi_alloc_sgtables(SCpnt); if (ret != BLK_STS_OK) - goto out; + return ret; cd = scsi_cd(rq->rq_disk); - /* from here on until we're complete, any goto out - * is used for a killable error condition */ - ret = BLK_STS_IOERR; - SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, "Doing sr request, block = %d\n", block)); @@ -509,12 +505,12 @@ static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt) SCpnt->allowed = MAX_RETRIES; /* - * This indicates that the command is ready from our end to be - * queued. + * This indicates that the command is ready from our end to be queued. */ - ret = BLK_STS_OK; + return BLK_STS_OK; out: - return ret; + scsi_free_sgtables(SCpnt); + return BLK_STS_IOERR; } static int sr_block_open(struct block_device *bdev, fmode_t mode) diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index e76bac4d14c51..69ade4fb71aab 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -165,7 +165,8 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, size_t *offset, size_t *len); extern void scsi_kunmap_atomic_sg(void *virt); -extern blk_status_t scsi_init_io(struct scsi_cmnd *cmd); +blk_status_t scsi_alloc_sgtables(struct scsi_cmnd *cmd); +void scsi_free_sgtables(struct scsi_cmnd *cmd); #ifdef CONFIG_SCSI_DMA extern int scsi_dma_map(struct scsi_cmnd *cmd); -- 2.25.1