From de671d6116b5210097cd6fbb877bac92536f265b Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 21 Sep 2022 15:19:54 -0600 Subject: block: change request end_io handler to pass back a return value 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. Reviewed-by: Keith Busch 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 27705fc584a0..53202eff545e 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -217,7 +217,8 @@ 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; @@ -231,7 +232,7 @@ 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); @@ -268,6 +269,7 @@ 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) @@ -353,7 +355,8 @@ 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; @@ -375,6 +378,7 @@ 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 b32f70f38c6e..a21631de45b3 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); } @@ -1295,12 +1296,13 @@ 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) @@ -1534,10 +1536,12 @@ 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 0f05b61a30fe..965a4c3e9d44 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1172,7 +1172,8 @@ 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; @@ -1184,7 +1185,7 @@ 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; @@ -1195,6 +1196,7 @@ 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 357791ff0623..2995789d5f9d 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -392,7 +392,8 @@ 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); @@ -411,6 +412,8 @@ 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 f9af99b7e672..7bbffd2a9beb 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 @@ out_unlock: 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 94d3153bae54..79af5140af8b 100644 --- a/drivers/nvme/target/passthru.c +++ b/drivers/nvme/target/passthru.c @@ -245,14 +245,15 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w) nvme_passthru_end(ctrl, effects, req->cmd, status); } -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 @@ maybe_retry: } } -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 */ -- cgit