6268953e89
This will print the disk name to the nvme event trace for io requests so a user can better distinguish traffic to different disks. This can be used to create disk based filters. For example, to see only nvme0n2 traffic: echo "disk == \"nvme0n2\"" > /sys/kernel/debug/tracing/events/nvme/filter Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> [hch: turned __assign_disk_name into an inline function] Signed-off-by: Christoph Hellwig <hch@lst.de>
141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/*
|
|
* NVM Express device driver tracepoints
|
|
* Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#include <asm/unaligned.h>
|
|
#include "trace.h"
|
|
|
|
static const char *nvme_trace_create_sq(struct trace_seq *p, u8 *cdw10)
|
|
{
|
|
const char *ret = trace_seq_buffer_ptr(p);
|
|
u16 sqid = get_unaligned_le16(cdw10);
|
|
u16 qsize = get_unaligned_le16(cdw10 + 2);
|
|
u16 sq_flags = get_unaligned_le16(cdw10 + 4);
|
|
u16 cqid = get_unaligned_le16(cdw10 + 6);
|
|
|
|
|
|
trace_seq_printf(p, "sqid=%u, qsize=%u, sq_flags=0x%x, cqid=%u",
|
|
sqid, qsize, sq_flags, cqid);
|
|
trace_seq_putc(p, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const char *nvme_trace_create_cq(struct trace_seq *p, u8 *cdw10)
|
|
{
|
|
const char *ret = trace_seq_buffer_ptr(p);
|
|
u16 cqid = get_unaligned_le16(cdw10);
|
|
u16 qsize = get_unaligned_le16(cdw10 + 2);
|
|
u16 cq_flags = get_unaligned_le16(cdw10 + 4);
|
|
u16 irq_vector = get_unaligned_le16(cdw10 + 6);
|
|
|
|
trace_seq_printf(p, "cqid=%u, qsize=%u, cq_flags=0x%x, irq_vector=%u",
|
|
cqid, qsize, cq_flags, irq_vector);
|
|
trace_seq_putc(p, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const char *nvme_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 *nvme_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 *nvme_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 *nvme_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 *nvme_trace_parse_admin_cmd(struct trace_seq *p,
|
|
u8 opcode, u8 *cdw10)
|
|
{
|
|
switch (opcode) {
|
|
case nvme_admin_create_sq:
|
|
return nvme_trace_create_sq(p, cdw10);
|
|
case nvme_admin_create_cq:
|
|
return nvme_trace_create_cq(p, cdw10);
|
|
case nvme_admin_identify:
|
|
return nvme_trace_admin_identify(p, cdw10);
|
|
default:
|
|
return nvme_trace_common(p, cdw10);
|
|
}
|
|
}
|
|
|
|
const char *nvme_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 nvme_trace_read_write(p, cdw10);
|
|
case nvme_cmd_dsm:
|
|
return nvme_trace_dsm(p, cdw10);
|
|
default:
|
|
return nvme_trace_common(p, cdw10);
|
|
}
|
|
}
|
|
|
|
const char *nvme_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;
|
|
}
|