* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "../../wrapper/ringbuffer/config.h"
-#include "../../wrapper/ringbuffer/backend_types.h"
-#include "../../wrapper/ringbuffer/frontend_types.h"
+#include <wrapper/ringbuffer/config.h>
+#include <wrapper/ringbuffer/backend_types.h>
+#include <wrapper/ringbuffer/frontend_types.h>
#include <linux/string.h>
#include <linux/uaccess.h>
extern void _lib_ring_buffer_write(struct lib_ring_buffer_backend *bufb,
size_t offset, const void *src, size_t len,
- ssize_t pagecpy);
+ size_t pagecpy);
extern void _lib_ring_buffer_memset(struct lib_ring_buffer_backend *bufb,
size_t offset, int c, size_t len,
- ssize_t pagecpy);
+ size_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);
+ size_t len, size_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
return 0;
}
+/*
+ * The ring buffer can count events recorded and overwritten per buffer,
+ * but it is disabled by default due to its performance overhead.
+ */
+#ifdef LTTNG_RING_BUFFER_COUNT_EVENTS
static inline
void subbuffer_count_record(const struct lib_ring_buffer_config *config,
struct lib_ring_buffer_backend *bufb,
sb_bindex = subbuffer_id_get_index(config, bufb->buf_wsb[idx].id);
v_inc(config, &bufb->array[sb_bindex]->records_commit);
}
+#else /* LTTNG_RING_BUFFER_COUNT_EVENTS */
+static inline
+void subbuffer_count_record(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer_backend *bufb,
+ unsigned long idx)
+{
+}
+#endif /* #else LTTNG_RING_BUFFER_COUNT_EVENTS */
/*
* Reader has exclusive subbuffer access for record consumption. No need to
/*
* 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(
return pages->data_size;
}
+static inline
+void subbuffer_inc_packet_count(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer_backend *bufb,
+ unsigned long idx)
+{
+ bufb->buf_cnt[idx].seq_cnt++;
+}
+
/**
* lib_ring_buffer_clear_noref - Clear the noref subbuffer flag, called by
* writer.
/*
* We use __copy_from_user_inatomic to copy userspace data since we already
* did the access_ok for the whole range.
+ *
+ * Return 0 if OK, nonzero on error.
*/
static inline
unsigned long lib_ring_buffer_do_copy_from_user_inatomic(void *dest,