Add 'allow_file_create' option

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index aee7ece9da3a8829fedc0884dfff3f0bb00ca182..cf8ae94c86b83c516411396b336f720e5ab03931 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -65,7 +65,9 @@ static int extend_file(struct thread_data *td, struct fio_file *f)
                }
        }
 
-       flags = O_WRONLY | O_CREAT;
+       flags = O_WRONLY;
+       if (td->o.allow_create)
+               flags |= O_CREAT;
        if (new_layout)
                flags |= O_TRUNC;
 
@@ -76,7 +78,13 @@ static int extend_file(struct thread_data *td, struct fio_file *f)
        dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
        f->fd = open(f->file_name, flags, 0644);
        if (f->fd < 0) {
-               td_verror(td, errno, "open");
+               int err = errno;
+
+               if (err == ENOENT && !td->o.allow_create)
+                       log_err("fio: file creation disallowed by "
+                                       "allow_file_create=0\n");
+               else
+                       td_verror(td, err, "open");
                return 1;
        }
 
@@ -539,7 +547,7 @@ int generic_open_file(struct thread_data *td, struct fio_file *f)
        }
        if (td->o.sync_io)
                flags |= O_SYNC;
-       if (td->o.create_on_open)
+       if (td->o.create_on_open && td->o.allow_create)
                flags |= O_CREAT;
 skip_flags:
        if (f->filetype != FIO_TYPE_FILE)
@@ -550,7 +558,7 @@ open_again:
                if (!read_only)
                        flags |= O_RDWR;
 
-               if (f->filetype == FIO_TYPE_FILE)
+               if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
                        flags |= O_CREAT;
 
                if (is_std)