diff options
| author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2018-08-07 23:01:07 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-08-08 12:00:53 +0200 |
| commit | dedf0be544614b6d9d395e78d72cc8c30d03e440 (patch) | |
| tree | 3d1fb89742e040317621eb41f3b3f670ec3c198a /drivers/nvme/target/io-cmd-bdev.c | |
| parent | 1293477f4f324f9cf23a36f6cc0adc6801f1baac (diff) | |
nvmet: add ns write protect support
This patch implements the Namespace Write Protect feature described in
"NVMe TP 4005a Namespace Write Protect". In this version, we implement
No Write Protect and Write Protect states for target ns which can be
toggled by set-features commands from the host side.
For write-protect state transition, we need to flush the ns specified
as a part of command so we also add helpers for carrying out synchronous
flush operations.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: fixed an incorrect endianess conversion, minor cleanups]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target/io-cmd-bdev.c')
| -rw-r--r-- | drivers/nvme/target/io-cmd-bdev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index e0b0f7df70c2..7bc9f6240432 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -124,6 +124,13 @@ static void nvmet_bdev_execute_flush(struct nvmet_req *req) submit_bio(bio); } +u16 nvmet_bdev_flush(struct nvmet_req *req) +{ + if (blkdev_issue_flush(req->ns->bdev, GFP_KERNEL, NULL)) + return NVME_SC_INTERNAL | NVME_SC_DNR; + return 0; +} + static u16 nvmet_bdev_discard_range(struct nvmet_ns *ns, struct nvme_dsm_range *range, struct bio **bio) { |