backend: fix potential division-by-zero

[fio.git] / libfio.c

diff --git a/libfio.c b/libfio.c
index f4aac2efb739c6910ca37cb046e6f2ad053c00d2..5ed8c6073603d4edb0b381fb356694cce600e04b 100644 (file)
--- a/libfio.c
+++ b/libfio.c
@@ -27,10 +27,12 @@
 #include <signal.h>
 #include <stdint.h>
 #include <locale.h>
+#include <fcntl.h>
 
 #include "fio.h"
 #include "smalloc.h"
 #include "os/os.h"
+#include "filelock.h"
 
 /*
  * Just expose an empty list, if the OS does not support disk util stats
@@ -172,6 +174,19 @@ void td_set_runstate(struct thread_data *td, int runstate)
        td->runstate = runstate;
 }
 
+int td_bump_runstate(struct thread_data *td, int new_state)
+{
+       int old_state = td->runstate;
+
+       td_set_runstate(td, new_state);
+       return old_state;
+}
+
+void td_restore_runstate(struct thread_data *td, int old_state)
+{
+       td_set_runstate(td, old_state);
+}
+
 void fio_terminate_threads(int group_id)
 {
        struct thread_data *td;
@@ -204,6 +219,36 @@ void fio_terminate_threads(int group_id)
        }
 }
 
+int fio_running_or_pending_io_threads(void)
+{
+       struct thread_data *td;
+       int i;
+
+       for_each_td(td, i) {
+               if (td->flags & TD_F_NOIO)
+                       continue;
+               if (td->runstate < TD_EXITED)
+                       return 1;
+       }
+
+       return 0;
+}
+
+void fio_set_fd_nonblocking(int fd, const char *who)
+{
+       int flags;
+
+       flags = fcntl(fd, F_GETFL);
+       if (flags < 0)
+               log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
+       else {
+               flags |= O_NONBLOCK;
+               flags = fcntl(fd, F_SETFL, flags);
+               if (flags < 0)
+                       log_err("fio: %s failed to get file flags: %s\n", who, strerror(errno));
+       }
+}
+
 static int endian_check(void)
 {
        union {
@@ -252,6 +297,11 @@ int initialize_fio(char *envp[])
 
        sinit();
 
+       if (fio_filelock_init()) {
+               log_err("fio: failed initializing filelock subsys\n");
+               return 1;
+       }
+
        /*
         * We need locale for number printing, if it isn't set then just
         * go with the US format.