Avoid opening files until they are used
Fio still opens and creates all files, just to check the size of them. Add
a specialized IO engine op for getting the size of a file and use that
instead.
This also cleans a lot of things up. Note that the IO engine version is now
bumped to 10, meaning that external engines will have to separate the
file open from the size checking.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index 22fecd9..b6ffe60 100644
--- a/fio.h
+++ b/fio.h
@@ -862,10 +862,10 @@
extern void close_files(struct thread_data *);
extern void close_and_free_files(struct thread_data *);
extern int __must_check setup_files(struct thread_data *);
-extern int __must_check open_files(struct thread_data *);
extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
extern int __must_check generic_close_file(struct thread_data *, struct fio_file *);
+extern int __must_check generic_get_file_size(struct thread_data *, struct fio_file *);
extern int add_file(struct thread_data *, const char *);
extern void get_file(struct fio_file *);
extern int __must_check put_file(struct thread_data *, struct fio_file *);
@@ -965,6 +965,7 @@
extern int __must_check td_io_commit(struct thread_data *);
extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
extern int td_io_close_file(struct thread_data *, struct fio_file *);
+extern int __must_check td_io_get_file_size(struct thread_data *, struct fio_file *);
/*
* blktrace support
@@ -990,11 +991,12 @@
void (*cleanup)(struct thread_data *);
int (*open_file)(struct thread_data *, struct fio_file *);
int (*close_file)(struct thread_data *, struct fio_file *);
+ int (*get_file_size)(struct thread_data *, struct fio_file *);
void *data;
void *dlhandle;
};
-#define FIO_IOOPS_VERSION 9
+#define FIO_IOOPS_VERSION 10
extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
extern void register_ioengine(struct ioengine_ops *);