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| author | NeilBrown <neilb@suse.de> | 2009-03-31 14:39:38 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-03-31 14:39:38 +1100 |
| commit | d0dabf7e577411c2bf6b616c751544dc241213d4 (patch) | |
| tree | 26a41b66f1ae83e2127eceace281332134518eb0 /drivers/md/raid5.h | |
| parent | 112bf8970dbdfc00bd4667da5996e57c2ce58066 (diff) | |
| download | linux-d0dabf7e577411c2bf6b616c751544dc241213d4.tar.gz | |
md/raid6: remove expectation that Q device is immediately after P device.
Code currently assumes that the devices in a raid6 stripe are 0 1 ... N-1 P Q in some rotated order. We will shortly add new layouts in which this strict pattern is broken. So remove this expectation. We still assume that the data disks are roughly in-order. However P and Q can be inserted anywhere within that order. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 0ed22dff56e0..0c7375ad12bd 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -196,15 +196,16 @@ enum reconstruct_states { struct stripe_head { struct hlist_node hash; - struct list_head lru; /* inactive_list or handle_list */ - struct raid5_private_data *raid_conf; - sector_t sector; /* sector of this row */ - int pd_idx; /* parity disk index */ - unsigned long state; /* state flags */ - atomic_t count; /* nr of active thread/requests */ + struct list_head lru; /* inactive_list or handle_list */ + struct raid5_private_data *raid_conf; + sector_t sector; /* sector of this row */ + short pd_idx; /* parity disk index */ + short qd_idx; /* 'Q' disk index for raid6 */ + unsigned long state; /* state flags */ + atomic_t count; /* nr of active thread/requests */ spinlock_t lock; int bm_seq; /* sequence number for bitmap flushes */ - int disks; /* disks in stripe */ + int disks; /* disks in stripe */ enum check_states check_state; enum reconstruct_states reconstruct_state; /* stripe_operations |