[PATCH 01/15] nvme: introduce namespace features flag

From: Max Gurtovoy <maxg@mellanox.com>
To: maxg@mellanox.com, linux-nvme@lists.infradead.org,
	kbusch@kernel.org, hch@lst.de, sagi@grimberg.me,
	martin.petersen@oracle.com, jsmart2021@gmail.com,
	axboe@kernel.dk
Cc: vladimirk@mellanox.com, shlomin@mellanox.com,
	israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com,
	nitzanc@mellanox.com
Subject: [PATCH 01/15] nvme: introduce namespace features flag
Date: Tue, 28 Apr 2020 16:11:21 +0300
Message-ID: <20200428131135.211521-2-maxg@mellanox.com> (raw)
In-Reply-To: <20200428131135.211521-1-maxg@mellanox.com>

Replace the specific ext boolean (that implies on extended LBA format)
with a feature in the new namespace features flag. This is a preparation
for adding more namespace features (such as metadata specific features).

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Israel Rukshin <israelr@mellanox.com>
---
 drivers/nvme/host/core.c | 8 +++++---
 drivers/nvme/host/nvme.h | 6 +++++-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index dfb064b4..02130d3 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1302,7 +1302,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
 	meta_len = (io.nblocks + 1) * ns->ms;
 	metadata = nvme_to_user_ptr(io.metadata);
 
-	if (ns->ext) {
+	if (ns->features & NVME_NS_EXT_LBAS) {
 		length += meta_len;
 		meta_len = 0;
 	} else if (meta_len) {
@@ -1880,7 +1880,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	blk_queue_io_min(disk->queue, phys_bs);
 	blk_queue_io_opt(disk->queue, io_opt);
 
-	if (ns->ms && !ns->ext &&
+	if (ns->ms && !(ns->features & NVME_NS_EXT_LBAS) &&
 	    (ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
 		nvme_init_integrity(disk, ns->ms, ns->pi_type);
 	if ((ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk)) ||
@@ -1919,8 +1919,10 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
 	else
 		iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob));
 
+	ns->features = 0;
 	ns->ms = le16_to_cpu(id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ms);
-	ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
+	if (ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT))
+		ns->features |= NVME_NS_EXT_LBAS;
 	/* the PI implementation requires metadata equal t10 pi tuple size */
 	if (ns->ms == sizeof(struct t10_pi_tuple))
 		ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index f3ab177..110577c7 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -364,6 +364,10 @@ struct nvme_ns_head {
 #endif
 };
 
+enum nvme_ns_features {
+	NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
+};
+
 struct nvme_ns {
 	struct list_head list;
 
@@ -383,8 +387,8 @@ struct nvme_ns {
 	u16 ms;
 	u16 sgs;
 	u32 sws;
-	bool ext;
 	u8 pi_type;
+	unsigned long features;
 	unsigned long flags;
 #define NVME_NS_REMOVING	0
 #define NVME_NS_DEAD     	1
-- 
1.8.3.1


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