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-rw-r--r--drivers/nvme/target/Makefile3
-rw-r--r--drivers/nvme/target/core.c8
-rw-r--r--drivers/nvme/target/trace.c201
-rw-r--r--drivers/nvme/target/trace.h141
4 files changed, 353 insertions, 0 deletions
diff --git a/drivers/nvme/target/Makefile b/drivers/nvme/target/Makefile
index 8c3ad0fb6860..2b33836f3d3e 100644
--- a/drivers/nvme/target/Makefile
+++ b/drivers/nvme/target/Makefile
@@ -1,5 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
+ccflags-y += -I$(src)
+
obj-$(CONFIG_NVME_TARGET) += nvmet.o
obj-$(CONFIG_NVME_TARGET_LOOP) += nvme-loop.o
obj-$(CONFIG_NVME_TARGET_RDMA) += nvmet-rdma.o
@@ -14,3 +16,4 @@ nvmet-rdma-y += rdma.o
nvmet-fc-y += fc.o
nvme-fcloop-y += fcloop.o
nvmet-tcp-y += tcp.o
+nvmet-$(CONFIG_TRACING) += trace.o
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 0587707b1a25..dad0243c7c96 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -10,6 +10,9 @@
#include <linux/pci-p2pdma.h>
#include <linux/scatterlist.h>
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
#include "nvmet.h"
struct workqueue_struct *buffered_io_wq;
@@ -691,6 +694,9 @@ static void __nvmet_req_complete(struct nvmet_req *req, u16 status)
if (unlikely(status))
nvmet_set_error(req, status);
+
+ trace_nvmet_req_complete(req);
+
if (req->ns)
nvmet_put_namespace(req->ns);
req->ops->queue_response(req);
@@ -850,6 +856,8 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
req->error_loc = NVMET_NO_ERROR_LOC;
req->error_slba = 0;
+ trace_nvmet_req_init(req, req->cmd);
+
/* no support for fused commands yet */
if (unlikely(flags & (NVME_CMD_FUSE_FIRST | NVME_CMD_FUSE_SECOND))) {
req->error_loc = offsetof(struct nvme_common_command, flags);
diff --git a/drivers/nvme/target/trace.c b/drivers/nvme/target/trace.c
new file mode 100644
index 000000000000..cdcdd14c6408
--- /dev/null
+++ b/drivers/nvme/target/trace.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NVM Express target device driver tracepoints
+ * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
+ */
+
+#include <asm/unaligned.h>
+#include "trace.h"
+
+static const char *nvmet_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u8 cns = cdw10[0];
+ u16 ctrlid = get_unaligned_le16(cdw10 + 2);
+
+ trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
+ u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u8 fid = cdw10[0];
+ u8 sel = cdw10[1] & 0x7;
+ u32 cdw11 = get_unaligned_le32(cdw10 + 4);
+
+ trace_seq_printf(p, "fid=0x%x sel=0x%x cdw11=0x%x", fid, sel, cdw11);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u64 slba = get_unaligned_le64(cdw10);
+ u16 length = get_unaligned_le16(cdw10 + 8);
+ u16 control = get_unaligned_le16(cdw10 + 10);
+ u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
+ u32 reftag = get_unaligned_le32(cdw10 + 16);
+
+ trace_seq_printf(p,
+ "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
+ slba, length, control, dsmgmt, reftag);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "nr=%u, attributes=%u",
+ get_unaligned_le32(cdw10),
+ get_unaligned_le32(cdw10 + 4));
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
+ u8 opcode, u8 *cdw10)
+{
+ switch (opcode) {
+ case nvme_admin_identify:
+ return nvmet_trace_admin_identify(p, cdw10);
+ case nvme_admin_get_features:
+ return nvmet_trace_admin_get_features(p, cdw10);
+ default:
+ return nvmet_trace_common(p, cdw10);
+ }
+}
+
+const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
+ u8 opcode, u8 *cdw10)
+{
+ switch (opcode) {
+ case nvme_cmd_read:
+ case nvme_cmd_write:
+ case nvme_cmd_write_zeroes:
+ return nvmet_trace_read_write(p, cdw10);
+ case nvme_cmd_dsm:
+ return nvmet_trace_dsm(p, cdw10);
+ default:
+ return nvmet_trace_common(p, cdw10);
+ }
+}
+
+static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
+ u8 *spc)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u8 attrib = spc[0];
+ u32 ofst = get_unaligned_le32(spc + 4);
+ u64 value = get_unaligned_le64(spc + 8);
+
+ trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
+ attrib, ofst, value);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
+ u8 *spc)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u16 recfmt = get_unaligned_le16(spc);
+ u16 qid = get_unaligned_le16(spc + 2);
+ u16 sqsize = get_unaligned_le16(spc + 4);
+ u8 cattr = spc[6];
+ u32 kato = get_unaligned_le32(spc + 8);
+
+ trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
+ recfmt, qid, sqsize, cattr, kato);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
+ u8 *spc)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u8 attrib = spc[0];
+ u32 ofst = get_unaligned_le32(spc + 4);
+
+ trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "spcecific=%*ph", 24, spc);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
+ u8 fctype, u8 *spc)
+{
+ switch (fctype) {
+ case nvme_fabrics_type_property_set:
+ return nvmet_trace_fabrics_property_set(p, spc);
+ case nvme_fabrics_type_connect:
+ return nvmet_trace_fabrics_connect(p, spc);
+ case nvme_fabrics_type_property_get:
+ return nvmet_trace_fabrics_property_get(p, spc);
+ default:
+ return nvmet_trace_fabrics_common(p, spc);
+ }
+}
+
+const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ if (*name)
+ trace_seq_printf(p, "disk=%s, ", name);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ /*
+ * XXX: We don't know the controller instance before executing the
+ * connect command itself because the connect command for the admin
+ * queue will not provide the cntlid which will be allocated in this
+ * command. In case of io queues, the controller instance will be
+ * mapped by the extra data of the connect command.
+ * If we can know the extra data of the connect command in this stage,
+ * we can update this print statement later.
+ */
+ if (ctrl)
+ trace_seq_printf(p, "%d", ctrl->cntlid);
+ else
+ trace_seq_printf(p, "_");
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
diff --git a/drivers/nvme/target/trace.h b/drivers/nvme/target/trace.h
new file mode 100644
index 000000000000..e645caa882dd
--- /dev/null
+++ b/drivers/nvme/target/trace.h
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * NVM Express target device driver tracepoints
+ * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
+ *
+ * This is entirely based on drivers/nvme/host/trace.h
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM nvmet
+
+#if !defined(_TRACE_NVMET_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_NVMET_H
+
+#include <linux/nvme.h>
+#include <linux/tracepoint.h>
+#include <linux/trace_seq.h>
+
+#include "nvmet.h"
+
+const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p, u8 opcode,
+ u8 *cdw10);
+const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p, u8 opcode,
+ u8 *cdw10);
+const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p, u8 fctype,
+ u8 *spc);
+
+#define parse_nvme_cmd(qid, opcode, fctype, cdw10) \
+ ((opcode) == nvme_fabrics_command ? \
+ nvmet_trace_parse_fabrics_cmd(p, fctype, cdw10) : \
+ (qid ? \
+ nvmet_trace_parse_nvm_cmd(p, opcode, cdw10) : \
+ nvmet_trace_parse_admin_cmd(p, opcode, cdw10)))
+
+const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl);
+#define __print_ctrl_name(ctrl) \
+ nvmet_trace_ctrl_name(p, ctrl)
+
+const char *nvmet_trace_disk_name(struct trace_seq *p, char *name);
+#define __print_disk_name(name) \
+ nvmet_trace_disk_name(p, name)
+
+#ifndef TRACE_HEADER_MULTI_READ
+static inline struct nvmet_ctrl *nvmet_req_to_ctrl(struct nvmet_req *req)
+{
+ return req->sq->ctrl;
+}
+
+static inline void __assign_disk_name(char *name, struct nvmet_req *req,
+ bool init)
+{
+ struct nvmet_ctrl *ctrl = nvmet_req_to_ctrl(req);
+ struct nvmet_ns *ns;
+
+ if ((init && req->sq->qid) || (!init && req->cq->qid)) {
+ ns = nvmet_find_namespace(ctrl, req->cmd->rw.nsid);
+ strncpy(name, ns->device_path, DISK_NAME_LEN);
+ return;
+ }
+
+ memset(name, 0, DISK_NAME_LEN);
+}
+#endif
+
+TRACE_EVENT(nvmet_req_init,
+ TP_PROTO(struct nvmet_req *req, struct nvme_command *cmd),
+ TP_ARGS(req, cmd),
+ TP_STRUCT__entry(
+ __field(struct nvme_command *, cmd)
+ __field(struct nvmet_ctrl *, ctrl)
+ __array(char, disk, DISK_NAME_LEN)
+ __field(int, qid)
+ __field(u16, cid)
+ __field(u8, opcode)
+ __field(u8, fctype)
+ __field(u8, flags)
+ __field(u32, nsid)
+ __field(u64, metadata)
+ __array(u8, cdw10, 24)
+ ),
+ TP_fast_assign(
+ __entry->cmd = cmd;
+ __entry->ctrl = nvmet_req_to_ctrl(req);
+ __assign_disk_name(__entry->disk, req, true);
+ __entry->qid = req->sq->qid;
+ __entry->cid = cmd->common.command_id;
+ __entry->opcode = cmd->common.opcode;
+ __entry->fctype = cmd->fabrics.fctype;
+ __entry->flags = cmd->common.flags;
+ __entry->nsid = le32_to_cpu(cmd->common.nsid);
+ __entry->metadata = le64_to_cpu(cmd->common.metadata);
+ memcpy(__entry->cdw10, &cmd->common.cdw10,
+ sizeof(__entry->cdw10));
+ ),
+ TP_printk("nvmet%s: %sqid=%d, cmdid=%u, nsid=%u, flags=%#x, "
+ "meta=%#llx, cmd=(%s, %s)",
+ __print_ctrl_name(__entry->ctrl),
+ __print_disk_name(__entry->disk),
+ __entry->qid, __entry->cid, __entry->nsid,
+ __entry->flags, __entry->metadata,
+ show_opcode_name(__entry->qid, __entry->opcode,
+ __entry->fctype),
+ parse_nvme_cmd(__entry->qid, __entry->opcode,
+ __entry->fctype, __entry->cdw10))
+);
+
+TRACE_EVENT(nvmet_req_complete,
+ TP_PROTO(struct nvmet_req *req),
+ TP_ARGS(req),
+ TP_STRUCT__entry(
+ __field(struct nvmet_ctrl *, ctrl)
+ __array(char, disk, DISK_NAME_LEN)
+ __field(int, qid)
+ __field(int, cid)
+ __field(u64, result)
+ __field(u16, status)
+ ),
+ TP_fast_assign(
+ __entry->ctrl = nvmet_req_to_ctrl(req);
+ __entry->qid = req->cq->qid;
+ __entry->cid = req->cqe->command_id;
+ __entry->result = le64_to_cpu(req->cqe->result.u64);
+ __entry->status = le16_to_cpu(req->cqe->status) >> 1;
+ __assign_disk_name(__entry->disk, req, false);
+ ),
+ TP_printk("nvmet%s: %sqid=%d, cmdid=%u, res=%#llx, status=%#x",
+ __print_ctrl_name(__entry->ctrl),
+ __print_disk_name(__entry->disk),
+ __entry->qid, __entry->cid, __entry->result, __entry->status)
+
+);
+
+#endif /* _TRACE_NVMET_H */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.