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-rw-r--r--include/linux/ftrace.h4
-rw-r--r--include/linux/kernel.h1
-rw-r--r--include/linux/trace_events.h3
-rw-r--r--include/linux/tracepoint.h6
-rw-r--r--include/trace/events/sunrpc.h12
-rw-r--r--include/trace/stages/stage2_data_offsets.h4
-rw-r--r--include/trace/stages/stage5_get_offsets.h25
-rw-r--r--include/trace/stages/stage6_event_callback.h29
-rw-r--r--include/uapi/linux/user_events.h6
9 files changed, 59 insertions, 31 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index e8921871ef9a..54d53f345d14 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -1151,7 +1151,9 @@ static inline void unpause_graph_tracing(void) { }
#ifdef CONFIG_TRACING
enum ftrace_dump_mode;
-extern enum ftrace_dump_mode ftrace_dump_on_oops;
+#define MAX_TRACER_SIZE 100
+extern char ftrace_dump_on_oops[];
+extern int ftrace_dump_on_oops_enabled(void);
extern int tracepoint_printk;
extern void disable_trace_on_warning(void);
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d718fbec72dd..be2e8c0a187e 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -215,6 +215,7 @@ enum ftrace_dump_mode {
DUMP_NONE,
DUMP_ALL,
DUMP_ORIG,
+ DUMP_PARAM,
};
#ifdef CONFIG_TRACING
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index fc6d0af56bb1..6f9bdfb09d1d 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -17,6 +17,9 @@ struct dentry;
struct bpf_prog;
union bpf_attr;
+/* Used for event string fields when they are NULL */
+#define EVENT_NULL_STR "(null)"
+
const char *trace_print_flags_seq(struct trace_seq *p, const char *delim,
unsigned long flags,
const struct trace_print_flags *flag_array);
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 88c0ba623ee6..689b6d71590e 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -199,7 +199,8 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
if (!(cond)) \
return; \
\
- if (WARN_ON_ONCE(RCUIDLE_COND(rcuidle))) \
+ if (WARN_ONCE(RCUIDLE_COND(rcuidle), \
+ "Bad RCU usage for tracepoint")) \
return; \
\
/* keep srcu and sched-rcu usage consistent */ \
@@ -259,7 +260,8 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
TP_ARGS(args), \
TP_CONDITION(cond), 0); \
if (IS_ENABLED(CONFIG_LOCKDEP) && (cond)) { \
- WARN_ON_ONCE(!rcu_is_watching()); \
+ WARN_ONCE(!rcu_is_watching(), \
+ "RCU not watching for tracepoint"); \
} \
} \
__DECLARE_TRACE_RCU(name, PARAMS(proto), PARAMS(args), \
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 4a2abf9daa46..ac05ed06a071 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -1331,18 +1331,18 @@ TRACE_EVENT(xs_stream_read_data,
__field(ssize_t, err)
__field(size_t, total)
__string(addr, xprt ? xprt->address_strings[RPC_DISPLAY_ADDR] :
- "(null)")
+ EVENT_NULL_STR)
__string(port, xprt ? xprt->address_strings[RPC_DISPLAY_PORT] :
- "(null)")
+ EVENT_NULL_STR)
),
TP_fast_assign(
__entry->err = err;
__entry->total = total;
__assign_str(addr, xprt ?
- xprt->address_strings[RPC_DISPLAY_ADDR] : "(null)");
+ xprt->address_strings[RPC_DISPLAY_ADDR] : EVENT_NULL_STR);
__assign_str(port, xprt ?
- xprt->address_strings[RPC_DISPLAY_PORT] : "(null)");
+ xprt->address_strings[RPC_DISPLAY_PORT] : EVENT_NULL_STR);
),
TP_printk("peer=[%s]:%s err=%zd total=%zu", __get_str(addr),
@@ -1787,7 +1787,7 @@ TRACE_EVENT(svc_process,
__string(service, name)
__string(procedure, svc_proc_name(rqst))
__string(addr, rqst->rq_xprt ?
- rqst->rq_xprt->xpt_remotebuf : "(null)")
+ rqst->rq_xprt->xpt_remotebuf : EVENT_NULL_STR)
),
TP_fast_assign(
@@ -1797,7 +1797,7 @@ TRACE_EVENT(svc_process,
__assign_str(service, name);
__assign_str(procedure, svc_proc_name(rqst));
__assign_str(addr, rqst->rq_xprt ?
- rqst->rq_xprt->xpt_remotebuf : "(null)");
+ rqst->rq_xprt->xpt_remotebuf : EVENT_NULL_STR);
),
TP_printk("addr=%s xid=0x%08x service=%s vers=%u proc=%s",
diff --git a/include/trace/stages/stage2_data_offsets.h b/include/trace/stages/stage2_data_offsets.h
index 469b6a64293d..8b0cff06d346 100644
--- a/include/trace/stages/stage2_data_offsets.h
+++ b/include/trace/stages/stage2_data_offsets.h
@@ -24,7 +24,7 @@
#define __array(type, item, len)
#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 item;
+#define __dynamic_array(type, item, len) u32 item; const void *item##_ptr_;
#undef __string
#define __string(item, src) __dynamic_array(char, item, -1)
@@ -45,7 +45,7 @@
#define __sockaddr(field, len) __dynamic_array(u8, field, len)
#undef __rel_dynamic_array
-#define __rel_dynamic_array(type, item, len) u32 item;
+#define __rel_dynamic_array(type, item, len) u32 item; const void *item##_ptr_;
#undef __rel_string
#define __rel_string(item, src) __rel_dynamic_array(char, item, -1)
diff --git a/include/trace/stages/stage5_get_offsets.h b/include/trace/stages/stage5_get_offsets.h
index e30a13be46ba..c6a62dfb18ef 100644
--- a/include/trace/stages/stage5_get_offsets.h
+++ b/include/trace/stages/stage5_get_offsets.h
@@ -9,6 +9,16 @@
#undef __entry
#define __entry entry
+#ifndef __STAGE5_STRING_SRC_H
+#define __STAGE5_STRING_SRC_H
+static inline const char *__string_src(const char *str)
+{
+ if (!str)
+ return EVENT_NULL_STR;
+ return str;
+}
+#endif /* __STAGE5_STRING_SRC_H */
+
/*
* Fields should never declare an array: i.e. __field(int, arr[5])
* If they do, it will cause issues in parsing and possibly corrupt the
@@ -47,10 +57,12 @@
#undef __string
#define __string(item, src) __dynamic_array(char, item, \
- strlen((src) ? (const char *)(src) : "(null)") + 1)
+ strlen(__string_src(src)) + 1) \
+ __data_offsets->item##_ptr_ = src;
#undef __string_len
-#define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1)
+#define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1)\
+ __data_offsets->item##_ptr_ = src;
#undef __vstring
#define __vstring(item, fmt, ap) __dynamic_array(char, item, \
@@ -67,11 +79,14 @@
__data_size += __item_length;
#undef __rel_string
-#define __rel_string(item, src) __rel_dynamic_array(char, item, \
- strlen((src) ? (const char *)(src) : "(null)") + 1)
+#define __rel_string(item, src) __rel_dynamic_array(char, item, \
+ strlen(__string_src(src)) + 1) \
+ __data_offsets->item##_ptr_ = src;
#undef __rel_string_len
-#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1)
+#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1)\
+ __data_offsets->item##_ptr_ = src;
+
/*
* __bitmask_size_in_bytes_raw is the number of bytes needed to hold
* num_possible_cpus().
diff --git a/include/trace/stages/stage6_event_callback.h b/include/trace/stages/stage6_event_callback.h
index 919b1a4da980..83da83a0c14f 100644
--- a/include/trace/stages/stage6_event_callback.h
+++ b/include/trace/stages/stage6_event_callback.h
@@ -32,14 +32,16 @@
#undef __assign_str
#define __assign_str(dst, src) \
- strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
-
-#undef __assign_str_len
-#define __assign_str_len(dst, src, len) \
do { \
- memcpy(__get_str(dst), (src), (len)); \
- __get_str(dst)[len] = '\0'; \
- } while(0)
+ char *__str__ = __get_str(dst); \
+ int __len__ = __get_dynamic_array_len(dst) - 1; \
+ WARN_ON_ONCE(__builtin_constant_p(src) ? \
+ strcmp((src), __data_offsets.dst##_ptr_) : \
+ (src) != __data_offsets.dst##_ptr_); \
+ memcpy(__str__, __data_offsets.dst##_ptr_ ? : \
+ EVENT_NULL_STR, __len__); \
+ __str__[__len__] = '\0'; \
+ } while (0)
#undef __assign_vstr
#define __assign_vstr(dst, fmt, va) \
@@ -91,14 +93,13 @@
#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1)
#undef __assign_rel_str
-#define __assign_rel_str(dst, src) \
- strcpy(__get_rel_str(dst), (src) ? (const char *)(src) : "(null)");
-
-#undef __assign_rel_str_len
-#define __assign_rel_str_len(dst, src, len) \
+#define __assign_rel_str(dst) \
do { \
- memcpy(__get_rel_str(dst), (src), (len)); \
- __get_rel_str(dst)[len] = '\0'; \
+ char *__str__ = __get_rel_str(dst); \
+ int __len__ = __get_rel_dynamic_array_len(dst) - 1; \
+ memcpy(__str__, __data_offsets.dst##_ptr_ ? : \
+ EVENT_NULL_STR, __len__); \
+ __str__[__len__] = '\0'; \
} while (0)
#undef __rel_bitmask
diff --git a/include/uapi/linux/user_events.h b/include/uapi/linux/user_events.h
index f74f3aedd49c..a03de03dccbc 100644
--- a/include/uapi/linux/user_events.h
+++ b/include/uapi/linux/user_events.h
@@ -12,6 +12,7 @@
#include <linux/ioctl.h>
#define USER_EVENTS_SYSTEM "user_events"
+#define USER_EVENTS_MULTI_SYSTEM "user_events_multi"
#define USER_EVENTS_PREFIX "u:"
/* Create dynamic location entry within a 32-bit value */
@@ -22,8 +23,11 @@ enum user_reg_flag {
/* Event will not delete upon last reference closing */
USER_EVENT_REG_PERSIST = 1U << 0,
+ /* Event will be allowed to have multiple formats */
+ USER_EVENT_REG_MULTI_FORMAT = 1U << 1,
+
/* This value or above is currently non-ABI */
- USER_EVENT_REG_MAX = 1U << 1,
+ USER_EVENT_REG_MAX = 1U << 2,
};
/*
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2025-01-06 06:09:12 +0000