readahead: add interface to sd-daemon.[ch] to control readahead

1 files changed, 10 insertions, 0 deletions

diff --git a/src/sd-daemon.h b/src/sd-daemon.h
index 008a44c1d2..2fbfe955ce 100644
--- a/src/sd-daemon.h
+++ b/src/sd-daemon.h
@@ -254,6 +254,16 @@ int sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(
 */
 int sd_booted(void) _sd_hidden_;
 
+/*
+  Controls ongoing disk read-ahead operations during boot-up. The argument
+  must be a string, and either "cancel", "done" or "noreplay".
+
+  cancel = terminate read-ahead data collection, drop collected information
+  done = terminate read-ahead data collection, keep collected information
+  noreplay = terminate read-ahead replay
+*/
+int sd_readahead(const char *action);
+
 #ifdef __cplusplus
 }
 #endif