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authorBoaz Harrosh <bharrosh@panasas.com>2011-09-28 14:18:45 +0400
committerBoaz Harrosh <bharrosh@panasas.com>2011-10-14 20:54:41 +0400
commit5a51c0c7e9a913649aa65d8233470682bcbb7694 (patch)
tree4ed43b3a2f9fade227e098771a5bed66f6a71dc4 /include/scsi
parent3bd9856857339d7ee8c4ad50030583f1b9415c39 (diff)
downloadlinux-5a51c0c7e9a913649aa65d8233470682bcbb7694.tar.xz
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>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/osd_ore.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
index 492b70d43bb6..716dbeae8cd2 100644
--- a/include/scsi/osd_ore.h
+++ b/include/scsi/osd_ore.h
@@ -42,6 +42,13 @@ struct ore_layout {
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 @@ static inline unsigned ore_io_state_size(unsigned numdevs)
}
/* 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);