Merge branches 'core/softlockup', 'core/softirq', 'core/resources', 'core/printk...

[pandora-kernel.git] / include / linux / raid / raid10.h

diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h
index dfa5283..e9091cf 100644 (file)
--- a/include/linux/raid/raid10.h
+++ b/include/linux/raid/raid10.h
@@ -16,7 +16,6 @@ struct r10_private_data_s {
        mddev_t                 *mddev;
        mirror_info_t           *mirrors;
        int                     raid_disks;
-       int                     working_disks;
        spinlock_t              device_lock;
 
        /* geometry */
@@ -24,11 +23,16 @@ struct r10_private_data_s {
        int                     far_copies;   /* number of copies layed out
                                               * at large strides across drives
                                               */
+       int                     far_offset;   /* far_copies are offset by 1 stripe
+                                              * instead of many
+                                              */
        int                     copies;       /* near_copies * far_copies.
                                               * must be <= raid_disks
                                               */
        sector_t                stride;       /* distance between far copies.
-                                              * This is size / far_copies
+                                              * This is size / far_copies unless
+                                              * far_offset, in which case it is
+                                              * 1 stripe.
                                               */
 
        int chunk_shift; /* shift from chunks to sectors */
@@ -104,6 +108,13 @@ struct r10bio_s {
        } devs[0];
 };
 
+/* when we get a read error on a read-only array, we redirect to another
+ * device without failing the first device, or trying to over-write to
+ * correct the read error.  To keep track of bad blocks on a per-bio
+ * level, we store IO_BLOCKED in the appropriate 'bios' pointer
+ */
+#define IO_BLOCKED ((struct bio*)1)
+
 /* bits for r10bio.state */
 #define        R10BIO_Uptodate 0
 #define        R10BIO_IsSync   1