On 5/22/25 00:31, Keith Busch wrote:
From: Keith Busch <kbusch@xxxxxxxxxx>
Register the nvme namespace copy capablities with the request_queue
limits and implement support for the REQ_OP_COPY operation.
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
---
drivers/nvme/host/core.c | 61 ++++++++++++++++++++++++++++++++++++++++
include/linux/nvme.h | 42 ++++++++++++++++++++++++++-
2 files changed, 102 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f69a232a000ac..3134fe85b1abc 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -888,6 +888,52 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
return BLK_STS_OK;
}
+static inline blk_status_t nvme_setup_copy(struct nvme_ns *ns,
+ struct request *req, struct nvme_command *cmnd)
+{
+ struct nvme_copy_range *range;
+ struct req_iterator iter;
+ struct bio_vec bvec;
+ u16 control = 0;
+ int i = 0;
+
+ static const size_t alloc_size = sizeof(*range) * NVME_COPY_MAX_RANGES;
+
+ if (WARN_ON_ONCE(blk_rq_nr_phys_segments(req) >= NVME_COPY_MAX_RANGES))
+ return BLK_STS_IOERR;
+
+ range = kzalloc(alloc_size, GFP_ATOMIC | __GFP_NOWARN);
+ if (!range)
+ return BLK_STS_RESOURCE;
+
+ if (req->cmd_flags & REQ_FUA)
+ control |= NVME_RW_FUA;
+ if (req->cmd_flags & REQ_FAILFAST_DEV)
+ control |= NVME_RW_LR;
FAILFAST_DEV? Is that even set anywhere?
Otherwise looks ok.
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
