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block: pass io_comp_batch to rq_end_io_fn callback

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Add a third parameter 'const struct io_comp_batch *' to the rq_end_io_fn
callback signature. This allows end_io handlers to access the completion
batch context when requests are completed via blk_mq_end_request_batch().

The io_comp_batch is passed from blk_mq_end_request_batch(), while NULL
is passed from __blk_mq_end_request() and blk_mq_put_rq_ref() which don't
have batch context.

This infrastructure change enables drivers to detect whether they're
being called from a batched completion path (like iopoll) and access
additional context stored in the io_comp_batch.

Update all rq_end_io_fn implementations:
- block/blk-mq.c: blk_end_sync_rq
- block/blk-flush.c: flush_end_io, mq_flush_data_end_io
- drivers/nvme/host/ioctl.c: nvme_uring_cmd_end_io
- drivers/nvme/host/core.c: nvme_keep_alive_end_io
- drivers/nvme/host/pci.c: abort_endio, nvme_del_queue_end, nvme_del_cq_end
- drivers/nvme/target/passthru.c: nvmet_passthru_req_done
- drivers/scsi/scsi_error.c: eh_lock_door_done
- drivers/scsi/sg.c: sg_rq_end_io
- drivers/scsi/st.c: st_scsi_execute_end
- drivers/target/target_core_pscsi.c: pscsi_req_done
- drivers/md/dm-rq.c: end_clone_request

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei
2026-01-16 15:46:37 +08:00
committed by Jens Axboe
parent df73d3c618
commit 5e2fde1a94
12 changed files with 39 additions and 21 deletions
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6
drivers/target/target_core_pscsi.c
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@@ -39,7 +39,8 @@ static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
}
static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
static enum rq_end_io_ret pscsi_req_done(struct request *, blk_status_t);
static enum rq_end_io_ret pscsi_req_done(struct request *, blk_status_t,
const struct io_comp_batch *);
/* pscsi_attach_hba():
*
@@ -1001,7 +1002,8 @@ static sector_t pscsi_get_blocks(struct se_device *dev)
}
static enum rq_end_io_ret pscsi_req_done(struct request *req,
blk_status_t status)
blk_status_t status,
const struct io_comp_batch *iob)
{
struct se_cmd *cmd = req->end_io_data;
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);