ore/exofs: Define new ore_verify_layout
All users of the ore will need to check if current code
supports the given layout. For example RAID5/6 is not
currently supported.
So move all the checks from exofs/super.c to a new
ore_verify_layout() to be used by ore users.
Note that any new layout should be passed through the
ore_verify_layout() because the ore engine will prepare
and verify some internal members of ore_layout, and
assumes it's called.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
index 492b70d..716dbea 100644
--- a/include/scsi/osd_ore.h
+++ b/include/scsi/osd_ore.h
@@ -42,6 +42,13 @@
unsigned group_width;
u64 group_depth;
unsigned group_count;
+
+ /* Cached often needed calculations filled in by
+ * ore_verify_layout
+ */
+ unsigned long max_io_length; /* Max length that should be passed to
+ * ore_get_rw_state
+ */
};
struct ore_dev {
@@ -138,6 +145,7 @@
}
/* ore.c */
+int ore_verify_layout(unsigned total_comps, struct ore_layout *layout);
int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps,
bool is_reading, u64 offset, u64 length,
struct ore_io_state **ios);