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nvmet: fix per feat data len for get_feature 

The existing implementation for the get_feature admin-cmd does not
use per-feature data len. This patch introduces a new helper function
nvmet_feat_data_len(), which is used to calculate per feature data len.
Right now we only set data len for fid 0x81 (NVME_FEAT_HOST_ID).

Fixes: commit e9061c3978 ("nvmet: Remove the data_len field from the nvmet_req struct")

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Amit Engel <amit.engel@dell.com>
[endiness, naming, and kernel style fixes]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Amit Engel 2020-01-08 01:47:24 +09:00 committed by Jens Axboe
parent 35038bffa8
commit e17016f6dc
1 changed files with 11 additions and 1 deletions
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12
drivers/nvme/target/admin-cmd.c
View File

@ -24,6 +24,16 @@ u32 nvmet_get_log_page_len(struct nvme_command *cmd)
return len;
}
static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10)
{
switch (cdw10 & 0xff) {
case NVME_FEAT_HOST_ID:
return sizeof(req->sq->ctrl->hostid);
default:
return 0;
}
}
u64 nvmet_get_log_page_offset(struct nvme_command *cmd)
{
return le64_to_cpu(cmd->get_log_page.lpo);
@ -778,7 +788,7 @@ static void nvmet_execute_get_features(struct nvmet_req *req)
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
u16 status = 0;
if (!nvmet_check_data_len(req, 0))
if (!nvmet_check_data_len(req, nvmet_feat_data_len(req, cdw10)))
return;
switch (cdw10 & 0xff) {