From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/kernel/trace/trace_seq.c | 33 ++++++++++++++++++++++++++++++---
1 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/kernel/kernel/trace/trace_seq.c b/kernel/kernel/trace/trace_seq.c
index 6b1c562..1d84fcc 100644
--- a/kernel/kernel/trace/trace_seq.c
+++ b/kernel/kernel/trace/trace_seq.c
@@ -30,9 +30,6 @@
/* How much buffer is left on the trace_seq? */
#define TRACE_SEQ_BUF_LEFT(s) seq_buf_buffer_left(&(s)->seq)
-/* How much buffer is written? */
-#define TRACE_SEQ_BUF_USED(s) seq_buf_used(&(s)->seq)
-
/*
* trace_seq should work with being initialized with 0s.
*/
@@ -376,3 +373,33 @@
return seq_buf_to_user(&s->seq, ubuf, cnt);
}
EXPORT_SYMBOL_GPL(trace_seq_to_user);
+
+int trace_seq_hex_dump(struct trace_seq *s, const char *prefix_str,
+ int prefix_type, int rowsize, int groupsize,
+ const void *buf, size_t len, bool ascii)
+{
+ unsigned int save_len = s->seq.len;
+
+ if (s->full)
+ return 0;
+
+ __trace_seq_init(s);
+
+ if (TRACE_SEQ_BUF_LEFT(s) < 1) {
+ s->full = 1;
+ return 0;
+ }
+
+ seq_buf_hex_dump(&(s->seq), prefix_str,
+ prefix_type, rowsize, groupsize,
+ buf, len, ascii);
+
+ if (unlikely(seq_buf_has_overflowed(&s->seq))) {
+ s->seq.len = save_len;
+ s->full = 1;
+ return 0;
+ }
+
+ return 1;
+}
+EXPORT_SYMBOL(trace_seq_hex_dump);
--
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