[PATCH v4 1/1] nvme: trace: add disk name to tracepoints

From: Johannes Thumshirn
Date: Mon Jun 11 2018 - 14:46:42 EST

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Add disk name to tracepoints so we can better distinguish between
individual disks in the trace output.

Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx>

---

I'm not entirely sure if this adding the ctrl pointers to
nvme_complete_rq() and nvme_setup_cmd() is a good idea, it's the
fast-path after all.

Changes to v3:
* Fix compilation of nvme-fc.ko (kbuild robot)
* Fix compilation of nvme-loop.ko (kbuild robot)

Changes to v2:
* Pass nvme_ctrl to nvme_complete_rq() and nvme_setup_cmd()
* Fixed typo in commit message
* Dropped Sagi's R-b (it changed quite a lot since v2)
---
drivers/nvme/host/core.c | 12 ++++++------
drivers/nvme/host/fc.c | 4 ++--
drivers/nvme/host/nvme.h | 6 +++---
drivers/nvme/host/pci.c | 7 ++++---
drivers/nvme/host/rdma.c | 5 +++--
drivers/nvme/host/trace.h | 36 ++++++++++++++++++++++--------------
drivers/nvme/target/loop.c | 5 +++--
7 files changed, 43 insertions(+), 32 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index effb1309682e..dc65c6cf94d3 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -229,11 +229,11 @@ static inline bool nvme_req_needs_retry(struct request *req)
return true;
}

-void nvme_complete_rq(struct request *req)
+void nvme_complete_rq(struct nvme_ctrl *ctrl, struct request *req)
{
blk_status_t status = nvme_error_status(req);

- trace_nvme_complete_rq(req);
+ trace_nvme_complete_rq(ctrl->cntlid, req);

if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) {
if (nvme_req_needs_failover(req, status)) {
@@ -622,8 +622,8 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
return 0;
}

-blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
- struct nvme_command *cmd)
+blk_status_t nvme_setup_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ struct request *req, struct nvme_command *cmd)
{
blk_status_t ret = BLK_STS_OK;

@@ -653,9 +653,9 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,

cmd->common.command_id = req->tag;
if (ns)
- trace_nvme_setup_nvm_cmd(req->q->id, cmd);
+ trace_nvme_setup_nvm_cmd(ns->disk->disk_name, req->q->id, cmd);
else
- trace_nvme_setup_admin_cmd(cmd);
+ trace_nvme_setup_admin_cmd(ctrl->cntlid, cmd);
return ret;
}
EXPORT_SYMBOL_GPL(nvme_setup_cmd);
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 0bad65803271..e7357124dc90 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2288,7 +2288,7 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
if (unlikely(ret))
return ret;

- ret = nvme_setup_cmd(ns, rq, sqe);
+ ret = nvme_setup_cmd(&ctrl->ctrl, ns, rq, sqe);
if (ret)
return ret;

@@ -2369,7 +2369,7 @@ nvme_fc_complete_rq(struct request *rq)
atomic_set(&op->state, FCPOP_STATE_IDLE);

nvme_fc_unmap_data(ctrl, rq, op);
- nvme_complete_rq(rq);
+ nvme_complete_rq(&ctrl->ctrl, rq);
nvme_fc_ctrl_put(ctrl);
}

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 34df07d44f80..ce5e08887960 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -386,7 +386,7 @@ static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
put_device(ctrl->device);
}

-void nvme_complete_rq(struct request *req);
+void nvme_complete_rq(struct nvme_ctrl *ctrl, struct request *req);
void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
enum nvme_ctrl_state new_state);
@@ -421,8 +421,8 @@ int nvme_reinit_tagset(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set);
#define NVME_QID_ANY -1
struct request *nvme_alloc_request(struct request_queue *q,
struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
-blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
- struct nvme_command *cmd);
+blk_status_t nvme_setup_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ struct request *req, struct nvme_command *cmd);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buf, unsigned bufflen);
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index cd7aec58a301..250fa84ec011 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -877,7 +877,7 @@ static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
if (unlikely(nvmeq->cq_vector < 0))
return BLK_STS_IOERR;

- ret = nvme_setup_cmd(ns, req, &cmnd);
+ ret = nvme_setup_cmd(&dev->ctrl, ns, req, &cmnd);
if (ret)
return ret;

@@ -904,9 +904,10 @@ static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
static void nvme_pci_complete_rq(struct request *req)
{
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
+ struct nvme_dev *dev = iod->nvmeq->dev;

- nvme_unmap_data(iod->nvmeq->dev, req);
- nvme_complete_rq(req);
+ nvme_unmap_data(dev, req);
+ nvme_complete_rq(&dev->ctrl, req);
}

/* We read the CQE phase first to check if the rest of the entry is valid */
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 2aba03876d84..b3af36684150 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1627,7 +1627,7 @@ static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
ib_dma_sync_single_for_cpu(dev, sqe->dma,
sizeof(struct nvme_command), DMA_TO_DEVICE);

- ret = nvme_setup_cmd(ns, rq, c);
+ ret = nvme_setup_cmd(&queue->ctrl->ctrl, ns, rq, c);
if (ret)
return ret;

@@ -1684,9 +1684,10 @@ static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
static void nvme_rdma_complete_rq(struct request *rq)
{
struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
+ struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl;

nvme_rdma_unmap_data(req->queue, rq);
- nvme_complete_rq(rq);
+ nvme_complete_rq(ctrl, rq);
}

static int nvme_rdma_map_queues(struct blk_mq_tag_set *set)
diff --git a/drivers/nvme/host/trace.h b/drivers/nvme/host/trace.h
index 01390f0e1671..f252afb02426 100644
--- a/drivers/nvme/host/trace.h
+++ b/drivers/nvme/host/trace.h
@@ -76,9 +76,10 @@ const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p, u8 opcode,
nvme_trace_parse_nvm_cmd(p, opcode, cdw10)

TRACE_EVENT(nvme_setup_admin_cmd,
- TP_PROTO(struct nvme_command *cmd),
- TP_ARGS(cmd),
+ TP_PROTO(int ctrl_id, struct nvme_command *cmd),
+ TP_ARGS(ctrl_id, cmd),
TP_STRUCT__entry(
+ __field(int, ctrl_id)
__field(u8, opcode)
__field(u8, flags)
__field(u16, cid)
@@ -86,6 +87,7 @@ TRACE_EVENT(nvme_setup_admin_cmd,
__array(u8, cdw10, 24)
),
TP_fast_assign(
+ __entry->ctrl_id = ctrl_id;
__entry->opcode = cmd->common.opcode;
__entry->flags = cmd->common.flags;
__entry->cid = cmd->common.command_id;
@@ -93,17 +95,19 @@ TRACE_EVENT(nvme_setup_admin_cmd,
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
),
- TP_printk(" cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
- __entry->cid, __entry->flags, __entry->metadata,
+ TP_printk("nvme%d: cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
+ __entry->ctrl_id, __entry->cid, __entry->flags,
+ __entry->metadata,
show_admin_opcode_name(__entry->opcode),
__parse_nvme_admin_cmd(__entry->opcode, __entry->cdw10))
);

TRACE_EVENT(nvme_setup_nvm_cmd,
- TP_PROTO(int qid, struct nvme_command *cmd),
- TP_ARGS(qid, cmd),
+ TP_PROTO(char *disk_name, int qid, struct nvme_command *cmd),
+ TP_ARGS(disk_name, qid, cmd),
TP_STRUCT__entry(
+ __string(name, disk_name)
__field(int, qid)
__field(u8, opcode)
__field(u8, flags)
@@ -113,6 +117,7 @@ TRACE_EVENT(nvme_setup_nvm_cmd,
__array(u8, cdw10, 24)
),
TP_fast_assign(
+ __assign_str(name, disk_name);
__entry->qid = qid;
__entry->opcode = cmd->common.opcode;
__entry->flags = cmd->common.flags;
@@ -122,17 +127,18 @@ TRACE_EVENT(nvme_setup_nvm_cmd,
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
),
- TP_printk("qid=%d, nsid=%u, cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
- __entry->qid, __entry->nsid, __entry->cid,
- __entry->flags, __entry->metadata,
+ TP_printk("%s: qid=%d, nsid=%u, cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
+ __get_str(name), __entry->qid, __entry->nsid,
+ __entry->cid, __entry->flags, __entry->metadata,
show_opcode_name(__entry->opcode),
__parse_nvme_cmd(__entry->opcode, __entry->cdw10))
);

TRACE_EVENT(nvme_complete_rq,
- TP_PROTO(struct request *req),
- TP_ARGS(req),
+ TP_PROTO(int ctrl_id, struct request *req),
+ TP_ARGS(ctrl_id, req),
TP_STRUCT__entry(
+ __field(int, ctrl_id)
__field(int, qid)
__field(int, cid)
__field(u64, result)
@@ -141,6 +147,7 @@ TRACE_EVENT(nvme_complete_rq,
__field(u16, status)
),
TP_fast_assign(
+ __entry->ctrl_id = ctrl_id;
__entry->qid = req->q->id;
__entry->cid = req->tag;
__entry->result = le64_to_cpu(nvme_req(req)->result.u64);
@@ -148,9 +155,10 @@ TRACE_EVENT(nvme_complete_rq,
__entry->flags = nvme_req(req)->flags;
__entry->status = nvme_req(req)->status;
),
- TP_printk("qid=%d, cmdid=%u, res=%llu, retries=%u, flags=0x%x, status=%u",
- __entry->qid, __entry->cid, __entry->result,
- __entry->retries, __entry->flags, __entry->status)
+ TP_printk("nvme%d: qid=%d, cmdid=%u, res=%llu, retries=%u, flags=0x%x, status=%u",
+ __entry->ctrl_id, __entry->qid, __entry->cid,
+ __entry->result, __entry->retries, __entry->flags,
+ __entry->status)

);

diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 1304ec3a7ede..8598ba0402ff 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -83,10 +83,11 @@ static inline int nvme_loop_queue_idx(struct nvme_loop_queue *queue)
static void nvme_loop_complete_rq(struct request *req)
{
struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(req);
+ struct nvme_ctrl *ctrl = &iod->queue->ctrl->ctrl;

nvme_cleanup_cmd(req);
sg_free_table_chained(&iod->sg_table, true);
- nvme_complete_rq(req);
+ nvme_complete_rq(ctrl, req);
}

static struct blk_mq_tags *nvme_loop_tagset(struct nvme_loop_queue *queue)
@@ -165,7 +166,7 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
if (unlikely(ret))
return ret;

- ret = nvme_setup_cmd(ns, req, &iod->cmd);
+ ret = nvme_setup_cmd(&queue->ctrl->ctrl, ns, req, &iod->cmd);
if (ret)
return ret;

--
2.16.4

Next message: Don Bollinger: "Re: [PATCH] optoe: driver to read/write SFP/QSFP EEPROMs"
Previous message: Jason Gunthorpe: "Re: [PATCH] IB/mlx4: Fix an error handling path in 'mlx4_ib_rereg_user_mr()'"
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