btrfs: introduce nparity raid_attr

[sfrench/cifs-2.6.git] / fs / btrfs / volumes.h

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index bca18f70650a8e23fa59e29b8fde25d8c6e335b7..40820e0ec5a413922c24d459b8c88b665146f3eb 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -331,6 +331,8 @@ struct btrfs_raid_attr {
        int tolerated_failures; /* max tolerated fail devs */
        int devs_increment;     /* ndevs has to be a multiple of this */
        int ncopies;            /* how many copies to data has */
+       int nparity;            /* number of stripes worth of bytes to store
+                                * parity information */
        int mindev_error;       /* error code if min devs requisite is unmet */
        const char raid_name[8]; /* name of the raid */
        u64 bg_flag;            /* block group flag of the raid */