1 files changed, 125 insertions, 0 deletions

diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
new file mode 100644
index 000000000000..c5c5e008e6de
--- /dev/null
+++ b/include/scsi/osd_ore.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2011
+ * Boaz Harrosh <bharrosh@panasas.com>
+ *
+ * Public Declarations of the ORE API
+ *
+ * This file is part of the ORE (Object Raid Engine) library.
+ *
+ * ORE 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. (GPL v2)
+ *
+ * ORE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the ORE; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __ORE_H__
+#define __ORE_H__
+
+#include <scsi/osd_initiator.h>
+#include <scsi/osd_attributes.h>
+#include <scsi/osd_sec.h>
+#include <linux/pnfs_osd_xdr.h>
+
+struct ore_comp {
+        struct osd_obj_id       obj;
+        u8                      cred[OSD_CAP_LEN];
+};
+
+struct ore_layout {
+        /* Our way of looking at the data_map */
+        unsigned stripe_unit;
+        unsigned mirrors_p1;
+
+        unsigned group_width;
+        u64      group_depth;
+        unsigned group_count;
+};
+
+struct ore_components {
+        unsigned        numdevs;                /* Num of devices in array    */
+        /* If @single_comp == EC_SINGLE_COMP, @comps points to a single
+         * component. else there are @numdevs components
+         */
+        enum EC_COMP_USAGE {
+                EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff
+        }               single_comp;
+        struct ore_comp *comps;
+        struct osd_dev  **ods;                  /* osd_dev array              */
+};
+
+struct ore_io_state;
+typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
+
+struct ore_io_state {
+        struct kref             kref;
+
+        void                    *private;
+        ore_io_done_fn  done;
+
+        struct ore_layout       *layout;
+        struct ore_components   *comps;
+
+        /* Global read/write IO*/
+        loff_t                  offset;
+        unsigned long           length;
+        void                    *kern_buff;
+
+        struct page             **pages;
+        unsigned                nr_pages;
+        unsigned                pgbase;
+        unsigned                pages_consumed;
+
+        /* Attributes */
+        unsigned                in_attr_len;
+        struct osd_attr         *in_attr;
+        unsigned                out_attr_len;
+        struct osd_attr         *out_attr;
+
+        bool                    reading;
+
+        /* Variable array of size numdevs */
+        unsigned numdevs;
+        struct ore_per_dev_state {
+                struct osd_request *or;
+                struct bio *bio;
+                loff_t offset;
+                unsigned length;
+                unsigned dev;
+        } per_dev[];
+};
+
+static inline unsigned ore_io_state_size(unsigned numdevs)
+{
+        return sizeof(struct ore_io_state) +
+                sizeof(struct ore_per_dev_state) * numdevs;
+}
+
+/* ore.c */
+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);
+int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps,
+                     struct ore_io_state **ios);
+void ore_put_io_state(struct ore_io_state *ios);
+
+int ore_check_io(struct ore_io_state *ios, u64 *resid);
+
+int ore_create(struct ore_io_state *ios);
+int ore_remove(struct ore_io_state *ios);
+int ore_write(struct ore_io_state *ios);
+int ore_read(struct ore_io_state *ios);
+int ore_truncate(struct ore_layout *layout, struct ore_components *comps,
+                 u64 size);
+
+int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr);
+
+extern const struct osd_attr g_attr_logical_length;
+
+#endif