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nvmet: add interface to update error-log page 

This patch adds nvmet_req based interface to the nvmet-core so that
we can update the error log page. We update error log page in
the request completion path when status is not set to NVME_SC_SUCCESS.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
hifive-unleashed-5.1
Chaitanya Kulkarni 2018-12-12 15:11:40 -08:00 committed by Christoph Hellwig
parent e4a976254e
commit 76574f37bf
2 changed files with 31 additions and 6 deletions
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32
drivers/nvme/target/core.c
View File

@ -611,14 +611,44 @@ static void nvmet_update_sq_head(struct nvmet_req *req)
req->rsp->sq_head = cpu_to_le16(req->sq->sqhd & 0x0000FFFF);
}
static void nvmet_set_error(struct nvmet_req *req, u16 status)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
struct nvme_error_slot *new_error_slot;
unsigned long flags;
req->rsp->status = cpu_to_le16(status << 1);
if (!ctrl || req->error_loc == -1)
return;
spin_lock_irqsave(&ctrl->error_lock, flags);
ctrl->err_counter++;
new_error_slot =
&ctrl->slots[ctrl->err_counter % NVMET_ERROR_LOG_SLOTS];
new_error_slot->error_count = cpu_to_le64(ctrl->err_counter);
new_error_slot->sqid = cpu_to_le16(req->sq->qid);
new_error_slot->cmdid = cpu_to_le16(req->cmd->common.command_id);
new_error_slot->status_field = cpu_to_le16(status << 1);
new_error_slot->param_error_location = cpu_to_le16(req->error_loc);
new_error_slot->lba = cpu_to_le64(req->error_slba);
new_error_slot->nsid = req->cmd->common.nsid;
spin_unlock_irqrestore(&ctrl->error_lock, flags);
/* set the more bit for this request */
req->rsp->status |= cpu_to_le16(1 << 14);
}
static void __nvmet_req_complete(struct nvmet_req *req, u16 status)
{
if (!req->sq->sqhd_disabled)
nvmet_update_sq_head(req);
req->rsp->sq_id = cpu_to_le16(req->sq->qid);
req->rsp->command_id = req->cmd->common.command_id;
if (unlikely(status))
nvmet_set_status(req, status);
nvmet_set_error(req, status);
if (req->ns)
nvmet_put_namespace(req->ns);
req->ops->queue_response(req);

5
drivers/nvme/target/nvmet.h
View File

@ -327,11 +327,6 @@ struct nvmet_req {
extern struct workqueue_struct *buffered_io_wq;
static inline void nvmet_set_status(struct nvmet_req *req, u16 status)
{
req->rsp->status = cpu_to_le16(status << 1);
}
static inline void nvmet_set_result(struct nvmet_req *req, u32 result)
{
req->rsp->result.u32 = cpu_to_le32(result);