linux-stable/drivers/nvme/target/trace.c
Hou Pu 8d84f9de69 nvmet: add set feature tracing support
A nvme connect command produces following trace from the target side.

Before:
    kworker/0:1H-56      [000] ....  9012.155139: nvmet_req_init: nvmet1: qid=0, cmdid=16, nsid=0, flags=0x40, meta=0x0, cmd=(nvme_admin_set_features, cdw10=07 00 00 00 07 00 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00)
    kworker/0:1H-56      [000] ....  9012.872272: nvmet_req_init: nvmet1: qid=0, cmdid=13, nsid=0, flags=0x40, meta=0x0, cmd=(nvme_admin_set_features, cdw10=0b 00 00 00 00 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00)

cmdline:/sys/kernel/debug/tracing# cat trace | grep feature
    kworker/0:1H-56      [000] ....   203.493914: nvmet_req_init: nvmet1: qid=0, cmdid=29, nsid=0, flags=0x40, meta=0x0, cmd=(nvme_admin_set_features, fid=0x7, sv=0x0, cdw11=0x70007)
    kworker/0:1H-56      [000] ....   204.197079: nvmet_req_init: nvmet1: qid=0, cmdid=29, nsid=0, flags=0x40, meta=0x0, cmd=(nvme_admin_set_features, fid=0xb, sv=0x0, cdw11=0x900)

Using ',' to separate different field like others in
nvmet_trace_admin_get_features.

Signed-off-by: Hou Pu <houpu.main@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-08-16 14:42:23 +02:00

235 lines
5.9 KiB
C

// 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_get_lba_status(struct trace_seq *p,
u8 *cdw10)
{
const char *ret = trace_seq_buffer_ptr(p);
u64 slba = get_unaligned_le64(cdw10);
u32 mndw = get_unaligned_le32(cdw10 + 8);
u16 rl = get_unaligned_le16(cdw10 + 12);
u8 atype = cdw10[15];
trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
slba, mndw, rl, atype);
trace_seq_putc(p, 0);
return ret;
}
static const char *nvmet_trace_admin_set_features(struct trace_seq *p,
u8 *cdw10)
{
const char *ret = trace_seq_buffer_ptr(p);
u8 fid = cdw10[0];
u8 sv = cdw10[3] & 0x8;
u32 cdw11 = get_unaligned_le32(cdw10 + 4);
trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, 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_set_features:
return nvmet_trace_admin_set_features(p, cdw10);
case nvme_admin_get_features:
return nvmet_trace_admin_get_features(p, cdw10);
case nvme_admin_get_lba_status:
return nvmet_trace_get_lba_status(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, "specific=%*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;
}