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nvmet: add tracing of reservation commands

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Add tracing of reservation commands, including register, acquire,
release and report, and also parse the action and rtype to string
to make the trace log more human-readable.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Guixin Liu 2024-10-14 18:14:58 +08:00 committed by Keith Busch
parent 8a502b5c16
commit 50bee3857d
1 changed files with 108 additions and 0 deletions
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108
drivers/nvme/target/trace.c
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@ -180,6 +180,106 @@ static const char *nvmet_trace_zone_mgmt_recv(struct trace_seq *p, u8 *cdw10)
return ret;
}
static const char *nvmet_trace_resv_reg(struct trace_seq *p, u8 *cdw10)
{
static const char * const rrega_strs[] = {
[0x00] = "register",
[0x01] = "unregister",
[0x02] = "replace",
};
const char *ret = trace_seq_buffer_ptr(p);
u8 rrega = cdw10[0] & 0x7;
u8 iekey = (cdw10[0] >> 3) & 0x1;
u8 ptpl = (cdw10[3] >> 6) & 0x3;
const char *rrega_str;
if (rrega < ARRAY_SIZE(rrega_strs) && rrega_strs[rrega])
rrega_str = rrega_strs[rrega];
else
rrega_str = "reserved";
trace_seq_printf(p, "rrega=%u:%s, iekey=%u, ptpl=%u",
rrega, rrega_str, iekey, ptpl);
trace_seq_putc(p, 0);
return ret;
}
static const char * const rtype_strs[] = {
[0x00] = "reserved",
[0x01] = "write exclusive",
[0x02] = "exclusive access",
[0x03] = "write exclusive registrants only",
[0x04] = "exclusive access registrants only",
[0x05] = "write exclusive all registrants",
[0x06] = "exclusive access all registrants",
};
static const char *nvmet_trace_resv_acq(struct trace_seq *p, u8 *cdw10)
{
static const char * const racqa_strs[] = {
[0x00] = "acquire",
[0x01] = "preempt",
[0x02] = "preempt and abort",
};
const char *ret = trace_seq_buffer_ptr(p);
u8 racqa = cdw10[0] & 0x7;
u8 iekey = (cdw10[0] >> 3) & 0x1;
u8 rtype = cdw10[1];
const char *racqa_str = "reserved";
const char *rtype_str = "reserved";
if (racqa < ARRAY_SIZE(racqa_strs) && racqa_strs[racqa])
racqa_str = racqa_strs[racqa];
if (rtype < ARRAY_SIZE(rtype_strs) && rtype_strs[rtype])
rtype_str = rtype_strs[rtype];
trace_seq_printf(p, "racqa=%u:%s, iekey=%u, rtype=%u:%s",
racqa, racqa_str, iekey, rtype, rtype_str);
trace_seq_putc(p, 0);
return ret;
}
static const char *nvmet_trace_resv_rel(struct trace_seq *p, u8 *cdw10)
{
static const char * const rrela_strs[] = {
[0x00] = "release",
[0x01] = "clear",
};
const char *ret = trace_seq_buffer_ptr(p);
u8 rrela = cdw10[0] & 0x7;
u8 iekey = (cdw10[0] >> 3) & 0x1;
u8 rtype = cdw10[1];
const char *rrela_str = "reserved";
const char *rtype_str = "reserved";
if (rrela < ARRAY_SIZE(rrela_strs) && rrela_strs[rrela])
rrela_str = rrela_strs[rrela];
if (rtype < ARRAY_SIZE(rtype_strs) && rtype_strs[rtype])
rtype_str = rtype_strs[rtype];
trace_seq_printf(p, "rrela=%u:%s, iekey=%u, rtype=%u:%s",
rrela, rrela_str, iekey, rtype, rtype_str);
trace_seq_putc(p, 0);
return ret;
}
static const char *nvmet_trace_resv_report(struct trace_seq *p, u8 *cdw10)
{
const char *ret = trace_seq_buffer_ptr(p);
u32 numd = get_unaligned_le32(cdw10);
u8 eds = cdw10[4] & 0x1;
trace_seq_printf(p, "numd=%u, eds=%u", numd, eds);
trace_seq_putc(p, 0);
return ret;
}
const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
u8 opcode, u8 *cdw10)
{
@ -195,6 +295,14 @@ const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
return nvmet_trace_zone_mgmt_send(p, cdw10);
case nvme_cmd_zone_mgmt_recv:
return nvmet_trace_zone_mgmt_recv(p, cdw10);
case nvme_cmd_resv_register:
return nvmet_trace_resv_reg(p, cdw10);
case nvme_cmd_resv_acquire:
return nvmet_trace_resv_acq(p, cdw10);
case nvme_cmd_resv_release:
return nvmet_trace_resv_rel(p, cdw10);
case nvme_cmd_resv_report:
return nvmet_trace_resv_report(p, cdw10);
default:
return nvmet_trace_common(p, cdw10);
}