[PATCH] engines/xnvme: fix fdp support for userspace drivers

[Ankit Kumar <ankit.kumar@samsung.com>]

The xNVMe backend supports FDP commands for userspace drivers
such as SPDK. Enable support in the xnvme ioengine.
Update the xnvme fdp example file accordingly.

Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
---
 engines/xnvme.c        |  2 +-
 examples/xnvme-fdp.fio | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/engines/xnvme.c b/engines/xnvme.c
index ce7b2bdd..b7824013 100644
--- a/engines/xnvme.c
+++ b/engines/xnvme.c
@@ -964,7 +964,7 @@ static int xnvme_fioe_fetch_ruhs(struct thread_data *td, struct fio_file *f,
 	uint32_t nsid;
 	int err = 0, err_lock;
 
-	if (f->filetype != FIO_TYPE_CHAR) {
+	if (f->filetype != FIO_TYPE_CHAR && f->filetype != FIO_TYPE_FILE) {
 		log_err("ioeng->fdp_ruhs(): ignoring filetype: %d\n", f->filetype);
 		return -EINVAL;
 	}
diff --git a/examples/xnvme-fdp.fio b/examples/xnvme-fdp.fio
index 86fbe0d3..c50959f1 100644
--- a/examples/xnvme-fdp.fio
+++ b/examples/xnvme-fdp.fio
@@ -16,6 +16,26 @@
 ;   --xnvme_sync=nvme \
 ;   --filename=/dev/ng0n1
 ;
+; # Use the xNVMe io-engine engine with SPDK backend, note that you have to set the Namespace-id
+; fio examples/xnvme-fdp.fio \
+;   --section=default \
+;   --ioengine=xnvme \
+;   --xnvme_dev_nsid=1 \
+;   --filename=0000\\:01\\:00.0
+;
+; NOTE: The URI encoded in the filename above, the ":" must be escaped.
+;
+; On the command-line using two "\\":
+;
+; --filename=0000\\:01\\:00.0
+;
+; Within a fio-script using a single "\":
+;
+; filename=0000\:01\:00.0
+;
+; NOTE: If you want to override the default bs, iodepth, and workload, then
+; invoke it as:
+;
 ; FIO_BS="512" FIO_RW="read" FIO_IODEPTH=16 fio examples/xnvme-fdp.fio \
 ;   --section=override --ioengine=xnvme --xnvme_sync=nvme --filename=/dev/ng0n1
 ;
-- 
2.25.1