From: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
[ Upstream commit 193fcf371f9e3705c14a0bf1d4bfc44af0f7c124 ]
In this preparation patch, we add helpers to convert lbas to sectors &
sectors to lba. This is needed to eliminate code duplication in the ZBD
backend.
Use these helpers in the block device backend.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvme/target/io-cmd-bdev.c | 8 +++-----
drivers/nvme/target/nvmet.h | 10 ++++++++++
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index 125dde3f410e..23095bdfce06 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -256,8 +256,7 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req)
if (is_pci_p2pdma_page(sg_page(req->sg)))
op |= REQ_NOMERGE;
- sector = le64_to_cpu(req->cmd->rw.slba);
- sector <<= (req->ns->blksize_shift - 9);
+ sector = nvmet_lba_to_sect(req->ns, req->cmd->rw.slba);
if (req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN) {
bio = &req->b.inline_bio;
@@ -345,7 +344,7 @@ static u16 nvmet_bdev_discard_range(struct nvmet_req *req,
int ret;
ret = __blkdev_issue_discard(ns->bdev,
- le64_to_cpu(range->slba) << (ns->blksize_shift - 9),
+ nvmet_lba_to_sect(ns, range->slba),
le32_to_cpu(range->nlb) << (ns->blksize_shift - 9),
GFP_KERNEL, 0, bio);
if (ret && ret != -EOPNOTSUPP) {
@@ -414,8 +413,7 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req)
if (!nvmet_check_transfer_len(req, 0))
return;
- sector = le64_to_cpu(write_zeroes->slba) <<
- (req->ns->blksize_shift - 9);
+ sector = nvmet_lba_to_sect(req->ns, write_zeroes->slba);
nr_sector = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) <<
(req->ns->blksize_shift - 9));
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 559a15ccc322..c585f4152535 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -601,4 +601,14 @@ static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns)
return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple);
}
+static inline __le64 nvmet_sect_to_lba(struct nvmet_ns *ns, sector_t sect)
+{
+ return cpu_to_le64(sect >> (ns->blksize_shift - SECTOR_SHIFT));
+}
+
+static inline sector_t nvmet_lba_to_sect(struct nvmet_ns *ns, __le64 lba)
+{
+ return le64_to_cpu(lba) << (ns->blksize_shift - SECTOR_SHIFT);
+}
+
#endif /* _NVMET_H */
--
2.30.2
