From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/kmsg_dump.h | 52 +++++++++++++++++++++++++++++++---------------------
1 files changed, 31 insertions(+), 21 deletions(-)
diff --git a/kernel/include/linux/kmsg_dump.h b/kernel/include/linux/kmsg_dump.h
index 8667393..3378bcb 100644
--- a/kernel/include/linux/kmsg_dump.h
+++ b/kernel/include/linux/kmsg_dump.h
@@ -30,18 +30,6 @@
};
/**
- * struct kmsg_dumper_iter - iterator for kernel crash message dumper
- * @active: Flag that specifies if this is currently dumping
- * @cur_seq: Points to the oldest message to dump (private)
- * @next_seq: Points after the newest message to dump (private)
- */
-struct kmsg_dumper_iter {
- bool active;
- u64 cur_seq;
- u64 next_seq;
-};
-
-/**
* struct kmsg_dumper - kernel crash message dumper structure
* @list: Entry in the dumper list (private)
* @dump: Call into dumping code which will retrieve the data with
@@ -51,22 +39,33 @@
*/
struct kmsg_dumper {
struct list_head list;
- void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason,
- struct kmsg_dumper_iter *iter);
+ void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason);
enum kmsg_dump_reason max_reason;
+ bool active;
bool registered;
+
+ /* private state of the kmsg iterator */
+ u32 cur_idx;
+ u32 next_idx;
+ u64 cur_seq;
+ u64 next_seq;
};
#ifdef CONFIG_PRINTK
void kmsg_dump(enum kmsg_dump_reason reason);
-bool kmsg_dump_get_line(struct kmsg_dumper_iter *iter, bool syslog,
+bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog,
+ char *line, size_t size, size_t *len);
+
+bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
char *line, size_t size, size_t *len);
-bool kmsg_dump_get_buffer(struct kmsg_dumper_iter *iter, bool syslog,
- char *buf, size_t size, size_t *len_out);
+bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
+ char *buf, size_t size, size_t *len);
-void kmsg_dump_rewind(struct kmsg_dumper_iter *iter);
+void kmsg_dump_rewind_nolock(struct kmsg_dumper *dumper);
+
+void kmsg_dump_rewind(struct kmsg_dumper *dumper);
int kmsg_dump_register(struct kmsg_dumper *dumper);
@@ -78,19 +77,30 @@
{
}
-static inline bool kmsg_dump_get_line(struct kmsg_dumper_iter *iter, bool syslog,
+static inline bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper,
+ bool syslog, const char *line,
+ size_t size, size_t *len)
+{
+ return false;
+}
+
+static inline bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
const char *line, size_t size, size_t *len)
{
return false;
}
-static inline bool kmsg_dump_get_buffer(struct kmsg_dumper_iter *iter, bool syslog,
+static inline bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
char *buf, size_t size, size_t *len)
{
return false;
}
-static inline void kmsg_dump_rewind(struct kmsg_dumper_iter *iter)
+static inline void kmsg_dump_rewind_nolock(struct kmsg_dumper *dumper)
+{
+}
+
+static inline void kmsg_dump_rewind(struct kmsg_dumper *dumper)
{
}
--
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