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nvme: enable vectored registered bufs for passthrough cmds

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nvme already supports registered buffers for non-vectored io_uring
passthrough commands, enable it for the vectored mode as well. It takes
an iovec, each entry of which should contain a range within the same
registered buffer specificied in sqe->buf_index.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Pavel Begunkov 2025-05-20 16:22:18 +01:00 committed by Christoph Hellwig
parent c4b680ac28
commit 3c12a8939e
1 changed files with 8 additions and 6 deletions
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14
drivers/nvme/host/ioctl.c
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@ -493,13 +493,15 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
d.timeout_ms = READ_ONCE(cmd->timeout_ms);
if (d.data_len && (ioucmd->flags & IORING_URING_CMD_FIXED)) {
/* fixedbufs is only for non-vectored io */
if (vec)
return -EINVAL;
int ddir = nvme_is_write(&c) ? WRITE : READ;
ret = io_uring_cmd_import_fixed(d.addr, d.data_len,
nvme_is_write(&c) ? WRITE : READ, &iter, ioucmd,
issue_flags);
if (vec)
ret = io_uring_cmd_import_fixed_vec(ioucmd,
u64_to_user_ptr(d.addr), d.data_len,
ddir, &iter, issue_flags);
else
ret = io_uring_cmd_import_fixed(d.addr, d.data_len,
ddir, &iter, ioucmd, issue_flags);
if (ret < 0)
return ret;