[PATCH] Offset verification header by a user-specified distance

[fio.git] / options.c

diff --git a/options.c b/options.c
index 829b808ce5be554f1f9092dbfdf9c7c022095dfb..130dc8c784b5f6f0ae67fd60550cd944073f91ea 100644 (file)
--- a/options.c
+++ b/options.c
@@ -203,6 +203,17 @@ static int str_opendir_cb(void *data, const char fio_unused *str)
        return add_dir_files(td, td->o.opendir);
 }
 
        return add_dir_files(td, td->o.opendir);
 }
 

+static int str_header_offset_cb(void *data, unsigned int *off)
+{
+       struct thread_data *td = data;
+       if (*off && *off < sizeof(struct verify_header)) {
+               log_err("fio: header_offset too small\n");
+               return 1;
+       }
+       td->o.header_offset = *off;
+       return 0;
+}
+

 
 #define __stringify_1(x)       #x
 #define __stringify(x)         __stringify_1(x)
 
 #define __stringify_1(x)       #x
 #define __stringify(x)         __stringify_1(x)


@@ -610,6 +621,13 @@ static struct fio_option options[] = {
                .help   = "Store buffer header every N bytes",
                .def    = "0",
        },
                .help   = "Store buffer header every N bytes",
                .def    = "0",
        },

+       {
+               .name   = "header_offset",
+               .type   = FIO_OPT_STR_VAL_INT,
+               .help   = "Offset header location by N bytes",
+               .def    = "0",
+               .cb     = str_header_offset_cb, 
+       },

        {
                .name   = "write_iolog",
                .type   = FIO_OPT_STR_STORE,
        {
                .name   = "write_iolog",
                .type   = FIO_OPT_STR_STORE,