IOshark portability across 32- and 64-bit, little/big endian devices.

Make IOshark portable across 32-bit and 64-bit devices, as well as
little endian and big endian architectures. This is achieved by
locking down the on-disk format of IOshark workload files. We can now
generate the workload files on a 64-bit host and use those workload
files to run the benchmark on a 32-bit userspace device (such as
fugu). The change also has minor fixes to make IOshark work on taimen
and walleye.

Test: Test across 64- and 32-bit devices. Generate workload files on a
64 bit device and test on 32-bit devices (as well as 64-bit devices).

Change-Id: I700ca5ae0da0ab029d977c906a63f1cd20a78a14
Signed-off-by: Mohan Srinivasan <srmohan@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/ioshark/ioshark_bench.h b/ioshark/ioshark_bench.h
index d0d09626..8ae8597d 100644
--- a/ioshark/ioshark_bench.h
+++ b/ioshark/ioshark_bench.h
@@ -152,3 +152,7 @@ char *get_ro_filename(int ix);
 void init_filename_cache(void);
 void free_filename_cache(void);
 int is_readonly_mount(char *filename, size_t size);
+
+int ioshark_read_header(FILE *fp, struct ioshark_header *header);
+int ioshark_read_file_state(FILE *fp, struct ioshark_file_state *state);
+int ioshark_read_file_op(FILE *fp, struct ioshark_file_operation *file_op);