Fix: allow racy tracepoint string input from kernel and userspace

[lttng-modules.git] / lib / ringbuffer / backend_internal.h

diff --git a/lib/ringbuffer/backend_internal.h b/lib/ringbuffer/backend_internal.h
index e048365ec44578104a919294916aeeb1472ca432..958328a76ad15abb3ca1e82992d659529042b61b 100644 (file)
--- a/lib/ringbuffer/backend_internal.h
+++ b/lib/ringbuffer/backend_internal.h
@@ -56,9 +56,15 @@ extern void _lib_ring_buffer_write(struct lib_ring_buffer_backend *bufb,
 extern void _lib_ring_buffer_memset(struct lib_ring_buffer_backend *bufb,
                                    size_t offset, int c, size_t len,
                                    ssize_t pagecpy);
+extern void _lib_ring_buffer_strcpy(struct lib_ring_buffer_backend *bufb,
+                                  size_t offset, const char *src, size_t len,
+                                  size_t pagecpy, int pad);
 extern void _lib_ring_buffer_copy_from_user_inatomic(struct lib_ring_buffer_backend *bufb,
                                            size_t offset, const void *src,
                                            size_t len, ssize_t pagecpy);
+extern void _lib_ring_buffer_strcpy_from_user_inatomic(struct lib_ring_buffer_backend *bufb,
+               size_t offset, const char __user *src, size_t len,
+               size_t pagecpy, int pad);
 
 /*
  * Subbuffer ID bits for overwrite mode. Need to fit within a single word to be
@@ -238,9 +244,10 @@ unsigned long subbuffer_get_records_count(
 
 /*
  * Must be executed at subbuffer delivery when the writer has _exclusive_
- * subbuffer access. See ring_buffer_check_deliver() for details.
- * ring_buffer_get_records_count() must be called to get the records count
- * before this function, because it resets the records_commit count.
+ * subbuffer access. See lib_ring_buffer_check_deliver() for details.
+ * lib_ring_buffer_get_records_count() must be called to get the records
+ * count before this function, because it resets the records_commit
+ * count.
  */
 static inline
 unsigned long subbuffer_count_records_overrun(