git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

nvmet: add ns write protect support

Browse Source 
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>
This commit is contained in:
Chaitanya Kulkarni
2018-08-07 23:01:07 -07:00
committed by Christoph Hellwig
parent 1293477f4f
commit dedf0be544
5 changed files with 114 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/nvme/target/io-cmd-bdev.c
View File

@@ -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)
{