nvme-trace: support for fabrics commands in host-side

This patch introduces fabrics commands tracing feature from host-side.
This patch does not include any changes for the previous host-side
tracing, but just add fabrics commands parsing in cmd=() format.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
[hch: fixed some whitespace damage]
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c
index 14b0d2993cbe..f01ad0fd60bb 100644
--- a/drivers/nvme/host/trace.c
+++ b/drivers/nvme/host/trace.c
@@ -135,6 +135,69 @@ const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p,
 	}
 }
 
+static const char *nvme_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 *nvme_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 *nvme_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 *nvme_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 *nvme_trace_parse_fabrics_cmd(struct trace_seq *p,
+		u8 fctype, u8 *spc)
+{
+	switch (fctype) {
+	case nvme_fabrics_type_property_set:
+		return nvme_trace_fabrics_property_set(p, spc);
+	case nvme_fabrics_type_connect:
+		return nvme_trace_fabrics_connect(p, spc);
+	case nvme_fabrics_type_property_get:
+		return nvme_trace_fabrics_property_get(p, spc);
+	default:
+		return nvme_trace_fabrics_common(p, spc);
+	}
+}
+
 const char *nvme_trace_disk_name(struct trace_seq *p, char *name)
 {
 	const char *ret = trace_seq_buffer_ptr(p);