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| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 12:28:52 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 12:49:56 -0500 |
| commit | d503b8f7474fe7ac616518f7fc49773cbab49f36 (patch) | |
| tree | e47ebb98991990056792727bac6fd348426058aa /kernel | |
| parent | c4846480831ea526bcab0ca0bf6364bfa6ed4227 (diff) | |
| download | linux-stable-d503b8f7474fe7ac616518f7fc49773cbab49f36.tar.gz linux-stable-d503b8f7474fe7ac616518f7fc49773cbab49f36.tar.bz2 linux-stable-d503b8f7474fe7ac616518f7fc49773cbab49f36.zip | |
tracing: Add trace_array_puts() to write into instance
Add a generic trace_array_puts() that can be used to "trace_puts()" into
an allocated trace_array instance. This is just another variant of
trace_array_printk().
Link: https://lkml.kernel.org/r/20230207173026.584717290@goodmis.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 5b16af9e7d30..9918bf7441ed 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1023,13 +1023,8 @@ __buffer_unlock_commit(struct trace_buffer *buffer, struct ring_buffer_event *ev ring_buffer_unlock_commit(buffer); } -/** - * __trace_puts - write a constant string into the trace buffer. - * @ip: The address of the caller - * @str: The constant string to write - * @size: The size of the string. - */ -int __trace_puts(unsigned long ip, const char *str, int size) +int __trace_array_puts(struct trace_array *tr, unsigned long ip, + const char *str, int size) { struct ring_buffer_event *event; struct trace_buffer *buffer; @@ -1037,7 +1032,7 @@ int __trace_puts(unsigned long ip, const char *str, int size) unsigned int trace_ctx; int alloc; - if (!(global_trace.trace_flags & TRACE_ITER_PRINTK)) + if (!(tr->trace_flags & TRACE_ITER_PRINTK)) return 0; if (unlikely(tracing_selftest_running || tracing_disabled)) @@ -1046,7 +1041,7 @@ int __trace_puts(unsigned long ip, const char *str, int size) alloc = sizeof(*entry) + size + 2; /* possible \n added */ trace_ctx = tracing_gen_ctx(); - buffer = global_trace.array_buffer.buffer; + buffer = tr->array_buffer.buffer; ring_buffer_nest_start(buffer); event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, alloc, trace_ctx); @@ -1068,11 +1063,23 @@ int __trace_puts(unsigned long ip, const char *str, int size) entry->buf[size] = '\0'; __buffer_unlock_commit(buffer, event); - ftrace_trace_stack(&global_trace, buffer, trace_ctx, 4, NULL); + ftrace_trace_stack(tr, buffer, trace_ctx, 4, NULL); out: ring_buffer_nest_end(buffer); return size; } +EXPORT_SYMBOL_GPL(__trace_array_puts); + +/** + * __trace_puts - write a constant string into the trace buffer. + * @ip: The address of the caller + * @str: The constant string to write + * @size: The size of the string. + */ +int __trace_puts(unsigned long ip, const char *str, int size) +{ + return __trace_array_puts(&global_trace, ip, str, size); +} EXPORT_SYMBOL_GPL(__trace_puts); /** |