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-rw-r--r--fs/exofs/ore_raid.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/fs/exofs/ore_raid.h b/fs/exofs/ore_raid.h
new file mode 100644
index 00000000000..c21080b4407
--- /dev/null
+++ b/fs/exofs/ore_raid.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) from 2011
+ * Boaz Harrosh <bharrosh@panasas.com>
+ *
+ * This file is part of the objects raid engine (ore).
+ *
+ * It is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "ore". If not, write to the Free Software Foundation, Inc:
+ * "Free Software Foundation <info@fsf.org>"
+ */
+
+#include <scsi/osd_ore.h>
+
+#define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a)
+
+#ifdef CONFIG_EXOFS_DEBUG
+#define ORE_DBGMSG(fmt, a...) \
+ printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a)
+#else
+#define ORE_DBGMSG(fmt, a...) \
+ do { if (0) printk(fmt, ##a); } while (0)
+#endif
+
+/* u64 has problems with printk this will cast it to unsigned long long */
+#define _LLU(x) (unsigned long long)(x)
+
+#define ORE_DBGMSG2(M...) do {} while (0)
+/* #define ORE_DBGMSG2 ORE_DBGMSG */
+
+/* Calculate the component order in a stripe. eg the logical data unit
+ * address within the stripe of @dev given the @par_dev of this stripe.
+ */
+static inline unsigned _dev_order(unsigned devs_in_group, unsigned mirrors_p1,
+ unsigned par_dev, unsigned dev)
+{
+ unsigned first_dev = dev - dev % devs_in_group;
+
+ dev -= first_dev;
+ par_dev -= first_dev;
+
+ if (devs_in_group == par_dev) /* The raid 0 case */
+ return dev / mirrors_p1;
+ /* raid4/5/6 case */
+ return ((devs_in_group + dev - par_dev - mirrors_p1) % devs_in_group) /
+ mirrors_p1;
+}
+
+/* ios_raid.c stuff needed by ios.c */
+int _ore_post_alloc_raid_stuff(struct ore_io_state *ios);
+void _ore_free_raid_stuff(struct ore_io_state *ios);
+
+void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len,
+ bool not_last);
+int _ore_add_parity_unit(struct ore_io_state *ios, struct ore_striping_info *si,
+ struct ore_per_dev_state *per_dev, unsigned cur_len);
+
+/* ios.c stuff needed by ios_raid.c */
+int _ore_add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg,
+ unsigned pgbase, struct page **pages,
+ struct ore_per_dev_state *per_dev, int cur_len);