From patchwork Thu Sep 22 18:28:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 12985684 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 7C975C6FA82 for ; Thu, 22 Sep 2022 18:31:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232474AbiIVSbf (ORCPT ); Thu, 22 Sep 2022 14:31:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232449AbiIVSa4 (ORCPT ); Thu, 22 Sep 2022 14:30:56 -0400 Received: from mail-io1-xd29.google.com (mail-io1-xd29.google.com [IPv6:2607:f8b0:4864:20::d29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D06210B5AE for ; Thu, 22 Sep 2022 11:28:10 -0700 (PDT) Received: by mail-io1-xd29.google.com with SMTP id b23so8471783iof.2 for ; Thu, 22 Sep 2022 11:28:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=Ez71/bwQQ37IExTa9EvzsotH0lbr+r0Fmd6a9LpY5qI=; b=NPeWa/A8vJTdvLPo5gTvnowSY+ovLKq9+O5essJvGBWSFKDs/bbcVDtK+P822U3bk/ ZNGfB7tuXwoLIVKs/rJSage5JEj64FhD6qb09xtp5TYr6Za/xmaJ9w2X+Y8vlaey0L/I 5XIm8k1dSJQZp+s0tLzeCUtRrkO7zRb4LQy0N4whqnWB7/0LmZHDJDgI7kJB5+IgMvaj uf2hFnBsAH+n8a20Uhfi1rmoRev2yy3aHwqMkb/zhsimS3TvyLSJWDaXvbHd36oDEkRV 9PWGeLtwpLr6HWeBK7+RotxcLkDHSWM8OosyShM/uVI1HTU2T0eTBoemyZTyhHH6Rrq8 8GEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=Ez71/bwQQ37IExTa9EvzsotH0lbr+r0Fmd6a9LpY5qI=; b=zSuUDCLkz6l/jUb7WceZLl27i3RJnEmt3bsrxc3p1msYivc8A2XL/pkVgDpi09lYFi ponpxEl+mvwnJeXCcNgCMWlmHzg5XYLFBBWhJdIb7MIl430CFteas68P8XIISBVOyDA6 AgZQUAa6uRWkPgQu23hDOyF7MPKJmGC2458FNo+P10Yxg0vZY/spqe/QwaM9BxNCgDgO iXXviN7ad3Szs7TRh3ZAZHLXV304xm1Hi5wgSjetFQ22EEXIRLG5SMiXyq3pROlX5YXq /hYPLpLhsSL1bvWPHJY1mUl7jTdiv0eCe9cT3VOKApZH9tDIDWoehoKRrxSfCf8eymeE EzLA== X-Gm-Message-State: ACrzQf3mgEDejNxKjeqcW/FFyBmoVj4AaZ9qS4FXyQHssWF81Wf84vin 0ZiEeMtcOLoVxHf22CVUe5W9eq8nMMjbZQ== X-Google-Smtp-Source: AMsMyM42NywJNwfvNyR1a/wX27JlMMmlhhibOrM/rQEm/dt2kbH+j3rv301Vk80NEhuuMdu8j8j2EQ== X-Received: by 2002:a05:6638:138e:b0:357:a6c7:e972 with SMTP id w14-20020a056638138e00b00357a6c7e972mr2758853jad.40.1663871289185; Thu, 22 Sep 2022 11:28:09 -0700 (PDT) Received: from m1max.localdomain ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id q20-20020a05663810d400b0035a468b7fbesm2440646jad.71.2022.09.22.11.28.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Sep 2022 11:28:08 -0700 (PDT) From: Jens Axboe To: linux-block@vger.kernel.org Cc: linux-scsi@vger.kernel.org, linux-nvme@lists.infradead.org, Jens Axboe Subject: [PATCH 2/5] block: change request end_io handler to pass back a return value Date: Thu, 22 Sep 2022 12:28:02 -0600 Message-Id: <20220922182805.96173-3-axboe@kernel.dk> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220922182805.96173-1-axboe@kernel.dk> References: <20220922182805.96173-1-axboe@kernel.dk> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Everything is just converted to returning RQ_END_IO_NONE, and there should be no functional changes with this patch. In preparation for allowing the end_io handler to pass ownership back to the block layer, rather than retain ownership of the request. Signed-off-by: Jens Axboe --- block/blk-flush.c | 10 +++++++--- block/blk-mq.c | 14 +++++++++----- drivers/md/dm-rq.c | 4 +++- drivers/nvme/host/core.c | 6 ++++-- drivers/nvme/host/ioctl.c | 5 ++++- drivers/nvme/host/pci.c | 12 ++++++++---- drivers/nvme/target/passthru.c | 5 +++-- drivers/scsi/scsi_error.c | 4 +++- drivers/scsi/sg.c | 9 +++++---- drivers/scsi/st.c | 4 +++- drivers/target/target_core_pscsi.c | 6 ++++-- drivers/ufs/core/ufshpb.c | 8 ++++++-- include/linux/blk-mq.h | 7 ++++++- 13 files changed, 65 insertions(+), 29 deletions(-) diff --git a/block/blk-flush.c b/block/blk-flush.c index d20a0c6b2c66..ac850f4d9c4c 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -218,7 +218,8 @@ static void blk_flush_complete_seq(struct request *rq, blk_kick_flush(q, fq, cmd_flags); } -static void flush_end_io(struct request *flush_rq, blk_status_t error) +static enum rq_end_io_ret flush_end_io(struct request *flush_rq, + blk_status_t error) { struct request_queue *q = flush_rq->q; struct list_head *running; @@ -232,7 +233,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error) if (!req_ref_put_and_test(flush_rq)) { fq->rq_status = error; spin_unlock_irqrestore(&fq->mq_flush_lock, flags); - return; + return RQ_END_IO_NONE; } blk_account_io_flush(flush_rq); @@ -269,6 +270,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error) } spin_unlock_irqrestore(&fq->mq_flush_lock, flags); + return RQ_END_IO_NONE; } bool is_flush_rq(struct request *rq) @@ -354,7 +356,8 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq, blk_flush_queue_rq(flush_rq, false); } -static void mq_flush_data_end_io(struct request *rq, blk_status_t error) +static enum rq_end_io_ret mq_flush_data_end_io(struct request *rq, + blk_status_t error) { struct request_queue *q = rq->q; struct blk_mq_hw_ctx *hctx = rq->mq_hctx; @@ -376,6 +379,7 @@ static void mq_flush_data_end_io(struct request *rq, blk_status_t error) spin_unlock_irqrestore(&fq->mq_flush_lock, flags); blk_mq_sched_restart(hctx); + return RQ_END_IO_NONE; } /** diff --git a/block/blk-mq.c b/block/blk-mq.c index d3a9f8b9c7ee..a4e018c82b7c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1001,7 +1001,8 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error) if (rq->end_io) { rq_qos_done(rq->q, rq); - rq->end_io(rq, error); + if (rq->end_io(rq, error) == RQ_END_IO_FREE) + blk_mq_free_request(rq); } else { blk_mq_free_request(rq); } @@ -1287,12 +1288,13 @@ struct blk_rq_wait { blk_status_t ret; }; -static void blk_end_sync_rq(struct request *rq, blk_status_t ret) +static enum rq_end_io_ret blk_end_sync_rq(struct request *rq, blk_status_t ret) { struct blk_rq_wait *wait = rq->end_io_data; wait->ret = ret; complete(&wait->done); + return RQ_END_IO_NONE; } bool blk_rq_is_poll(struct request *rq) @@ -1526,10 +1528,12 @@ static bool blk_mq_req_expired(struct request *rq, unsigned long *next) void blk_mq_put_rq_ref(struct request *rq) { - if (is_flush_rq(rq)) - rq->end_io(rq, 0); - else if (req_ref_put_and_test(rq)) + if (is_flush_rq(rq)) { + if (rq->end_io(rq, 0) == RQ_END_IO_FREE) + blk_mq_free_request(rq); + } else if (req_ref_put_and_test(rq)) { __blk_mq_free_request(rq); + } } static bool blk_mq_check_expired(struct request *rq, void *priv) diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 4f49bbcce4f1..3001b10a3fbf 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -292,11 +292,13 @@ static void dm_kill_unmapped_request(struct request *rq, blk_status_t error) dm_complete_request(rq, error); } -static void end_clone_request(struct request *clone, blk_status_t error) +static enum rq_end_io_ret end_clone_request(struct request *clone, + blk_status_t error) { struct dm_rq_target_io *tio = clone->end_io_data; dm_complete_request(tio->orig, error); + return RQ_END_IO_NONE; } static int dm_rq_bio_constructor(struct bio *bio, struct bio *bio_orig, diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 13080a017ecf..f946f85e7a66 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1177,7 +1177,8 @@ static void nvme_queue_keep_alive_work(struct nvme_ctrl *ctrl) queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ / 2); } -static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) +static enum rq_end_io_ret nvme_keep_alive_end_io(struct request *rq, + blk_status_t status) { struct nvme_ctrl *ctrl = rq->end_io_data; unsigned long flags; @@ -1189,7 +1190,7 @@ static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) dev_err(ctrl->device, "failed nvme_keep_alive_end_io error=%d\n", status); - return; + return RQ_END_IO_NONE; } ctrl->comp_seen = false; @@ -1200,6 +1201,7 @@ static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) spin_unlock_irqrestore(&ctrl->lock, flags); if (startka) nvme_queue_keep_alive_work(ctrl); + return RQ_END_IO_NONE; } static void nvme_keep_alive_work(struct work_struct *work) diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index 548aca8b5b9f..c80b3ecca5c8 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -385,7 +385,8 @@ static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd) io_uring_cmd_done(ioucmd, status, result); } -static void nvme_uring_cmd_end_io(struct request *req, blk_status_t err) +static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req, + blk_status_t err) { struct io_uring_cmd *ioucmd = req->end_io_data; struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); @@ -404,6 +405,8 @@ static void nvme_uring_cmd_end_io(struct request *req, blk_status_t err) nvme_uring_task_cb(ioucmd); else io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_cb); + + return RQ_END_IO_NONE; } static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 09b5d62f342b..361f09f23648 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1268,7 +1268,7 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); } -static void abort_endio(struct request *req, blk_status_t error) +static enum rq_end_io_ret abort_endio(struct request *req, blk_status_t error) { struct nvme_queue *nvmeq = req->mq_hctx->driver_data; @@ -1276,6 +1276,7 @@ static void abort_endio(struct request *req, blk_status_t error) "Abort status: 0x%x", nvme_req(req)->status); atomic_inc(&nvmeq->dev->ctrl.abort_limit); blk_mq_free_request(req); + return RQ_END_IO_NONE; } static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) @@ -2447,22 +2448,25 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) return result; } -static void nvme_del_queue_end(struct request *req, blk_status_t error) +static enum rq_end_io_ret nvme_del_queue_end(struct request *req, + blk_status_t error) { struct nvme_queue *nvmeq = req->end_io_data; blk_mq_free_request(req); complete(&nvmeq->delete_done); + return RQ_END_IO_NONE; } -static void nvme_del_cq_end(struct request *req, blk_status_t error) +static enum rq_end_io_ret nvme_del_cq_end(struct request *req, + blk_status_t error) { struct nvme_queue *nvmeq = req->end_io_data; if (error) set_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags); - nvme_del_queue_end(req, error); + return nvme_del_queue_end(req, error); } static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c index 6f39a29828b1..4876ccaac55b 100644 --- a/drivers/nvme/target/passthru.c +++ b/drivers/nvme/target/passthru.c @@ -240,14 +240,15 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w) blk_mq_free_request(rq); } -static void nvmet_passthru_req_done(struct request *rq, - blk_status_t blk_status) +static enum rq_end_io_ret nvmet_passthru_req_done(struct request *rq, + blk_status_t blk_status) { struct nvmet_req *req = rq->end_io_data; req->cqe->result = nvme_req(rq)->result; nvmet_req_complete(req, nvme_req(rq)->status); blk_mq_free_request(rq); + return RQ_END_IO_NONE; } static int nvmet_passthru_map_sg(struct nvmet_req *req, struct request *rq) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 448748e3fba5..786fb963cf3f 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -2004,9 +2004,11 @@ enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *scmd) } } -static void eh_lock_door_done(struct request *req, blk_status_t status) +static enum rq_end_io_ret eh_lock_door_done(struct request *req, + blk_status_t status) { blk_mq_free_request(req); + return RQ_END_IO_NONE; } /** diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 340b050ad28d..94c5e9a9309c 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -177,7 +177,7 @@ typedef struct sg_device { /* holds the state of each scsi generic device */ } Sg_device; /* tasklet or soft irq callback */ -static void sg_rq_end_io(struct request *rq, blk_status_t status); +static enum rq_end_io_ret sg_rq_end_io(struct request *rq, blk_status_t status); static int sg_start_req(Sg_request *srp, unsigned char *cmd); static int sg_finish_rem_req(Sg_request * srp); static int sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size); @@ -1311,7 +1311,7 @@ sg_rq_end_io_usercontext(struct work_struct *work) * This function is a "bottom half" handler that is called by the mid * level when a command is completed (or has failed). */ -static void +static enum rq_end_io_ret sg_rq_end_io(struct request *rq, blk_status_t status) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); @@ -1324,11 +1324,11 @@ sg_rq_end_io(struct request *rq, blk_status_t status) int result, resid, done = 1; if (WARN_ON(srp->done != 0)) - return; + return RQ_END_IO_NONE; sfp = srp->parentfp; if (WARN_ON(sfp == NULL)) - return; + return RQ_END_IO_NONE; sdp = sfp->parentdp; if (unlikely(atomic_read(&sdp->detaching))) @@ -1406,6 +1406,7 @@ sg_rq_end_io(struct request *rq, blk_status_t status) INIT_WORK(&srp->ew.work, sg_rq_end_io_usercontext); schedule_work(&srp->ew.work); } + return RQ_END_IO_NONE; } static const struct file_operations sg_fops = { diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 850172a2b8f1..55e7c07ebe4c 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -512,7 +512,8 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req) atomic64_dec(&STp->stats->in_flight); } -static void st_scsi_execute_end(struct request *req, blk_status_t status) +static enum rq_end_io_ret st_scsi_execute_end(struct request *req, + blk_status_t status) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req); struct st_request *SRpnt = req->end_io_data; @@ -532,6 +533,7 @@ static void st_scsi_execute_end(struct request *req, blk_status_t status) blk_rq_unmap_user(tmp); blk_mq_free_request(req); + return RQ_END_IO_NONE; } static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd, diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index e6a967ddc08c..8a7306e5e133 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -39,7 +39,7 @@ static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) } static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); -static void pscsi_req_done(struct request *, blk_status_t); +static enum rq_end_io_ret pscsi_req_done(struct request *, blk_status_t); /* pscsi_attach_hba(): * @@ -1002,7 +1002,8 @@ static sector_t pscsi_get_blocks(struct se_device *dev) return 0; } -static void pscsi_req_done(struct request *req, blk_status_t status) +static enum rq_end_io_ret pscsi_req_done(struct request *req, + blk_status_t status) { struct se_cmd *cmd = req->end_io_data; struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req); @@ -1029,6 +1030,7 @@ static void pscsi_req_done(struct request *req, blk_status_t status) } blk_mq_free_request(req); + return RQ_END_IO_NONE; } static const struct target_backend_ops pscsi_ops = { diff --git a/drivers/ufs/core/ufshpb.c b/drivers/ufs/core/ufshpb.c index a1a7a1175a5a..3d69a81c5b17 100644 --- a/drivers/ufs/core/ufshpb.c +++ b/drivers/ufs/core/ufshpb.c @@ -613,14 +613,17 @@ static void ufshpb_activate_subregion(struct ufshpb_lu *hpb, srgn->srgn_state = HPB_SRGN_VALID; } -static void ufshpb_umap_req_compl_fn(struct request *req, blk_status_t error) +static enum rq_end_io_ret ufshpb_umap_req_compl_fn(struct request *req, + blk_status_t error) { struct ufshpb_req *umap_req = (struct ufshpb_req *)req->end_io_data; ufshpb_put_req(umap_req->hpb, umap_req); + return RQ_END_IO_NONE; } -static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error) +static enum rq_end_io_ret ufshpb_map_req_compl_fn(struct request *req, + blk_status_t error) { struct ufshpb_req *map_req = (struct ufshpb_req *) req->end_io_data; struct ufshpb_lu *hpb = map_req->hpb; @@ -636,6 +639,7 @@ static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error) spin_unlock_irqrestore(&hpb->rgn_state_lock, flags); ufshpb_put_map_req(map_req->hpb, map_req); + return RQ_END_IO_NONE; } static void ufshpb_set_unmap_cmd(unsigned char *cdb, struct ufshpb_region *rgn) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 00a15808c137..e6fa49dd6196 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -14,7 +14,12 @@ struct blk_flush_queue; #define BLKDEV_MIN_RQ 4 #define BLKDEV_DEFAULT_RQ 128 -typedef void (rq_end_io_fn)(struct request *, blk_status_t); +enum rq_end_io_ret { + RQ_END_IO_NONE, + RQ_END_IO_FREE, +}; + +typedef enum rq_end_io_ret (rq_end_io_fn)(struct request *, blk_status_t); /* * request flags */