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nvmet: add set feature tracing support

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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>
This commit is contained in:
Hou Pu
2021-07-05 11:15:29 +08:00
committed by Christoph Hellwig
parent a7b5e8d864
commit 8d84f9de69
1 changed files with 17 additions and 1 deletions
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18
drivers/nvme/target/trace.c
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@@ -27,7 +27,7 @@ static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
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_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
trace_seq_putc(p, 0);
return ret;
@@ -49,6 +49,20 @@ static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
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);
@@ -94,6 +108,8 @@ const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
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: