ore/exofs: Define new ore_verify_layout

[profile/ivi/kernel-adaptation-intel-automotive.git] / include / scsi / osd_ore.h

diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
index c5c5e00..716dbea 100644 (file)
--- a/include/scsi/osd_ore.h
+++ b/include/scsi/osd_ore.h
@@ -34,15 +34,29 @@ struct ore_comp {
 
 struct ore_layout {
        /* Our way of looking at the data_map */
+       enum pnfs_osd_raid_algorithm4
+                raid_algorithm;
        unsigned stripe_unit;
        unsigned mirrors_p1;
 
        unsigned group_width;
        u64      group_depth;
        unsigned group_count;
+
+       /* Cached often needed calculations filled in by
+        * ore_verify_layout
+        */
+       unsigned long max_io_length;    /* Max length that should be passed to
+                                        * ore_get_rw_state
+                                        */
+};
+
+struct ore_dev {
+       struct osd_dev *od;
 };
 
 struct ore_components {
+       unsigned        first_dev;              /* First logical device no    */
        unsigned        numdevs;                /* Num of devices in array    */
        /* If @single_comp == EC_SINGLE_COMP, @comps points to a single
         * component. else there are @numdevs components
@@ -51,7 +65,35 @@ struct ore_components {
                EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff
        }               single_comp;
        struct ore_comp *comps;
-       struct osd_dev  **ods;                  /* osd_dev array              */
+
+       /* Array of pointers to ore_dev-* . User will usually have these pointed
+        * too a bigger struct which contain an "ore_dev ored" member and use
+        * container_of(oc->ods[i], struct foo_dev, ored) to access the bigger
+        * structure.
+        */
+       struct ore_dev  **ods;
+};
+
+/* ore_comp_dev Recievies a logical device index */
+static inline struct osd_dev *ore_comp_dev(
+       const struct ore_components *oc, unsigned i)
+{
+       BUG_ON((i < oc->first_dev) || (oc->first_dev + oc->numdevs <= i));
+       return oc->ods[i - oc->first_dev]->od;
+}
+
+static inline void ore_comp_set_dev(
+       struct ore_components *oc, unsigned i, struct osd_dev *od)
+{
+       oc->ods[i - oc->first_dev]->od = od;
+}
+
+struct ore_striping_info {
+       u64 obj_offset;
+       u64 group_length;
+       u64 M; /* for truncate */
+       unsigned dev;
+       unsigned unit_off;
 };
 
 struct ore_io_state;
@@ -59,12 +101,13 @@ typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
 
 struct ore_io_state {
        struct kref             kref;
+       struct ore_striping_info si;
 
        void                    *private;
        ore_io_done_fn  done;
 
        struct ore_layout       *layout;
-       struct ore_components   *comps;
+       struct ore_components   *oc;
 
        /* Global read/write IO*/
        loff_t                  offset;
@@ -102,6 +145,7 @@ static inline unsigned ore_io_state_size(unsigned numdevs)
 }
 
 /* ore.c */
+int ore_verify_layout(unsigned total_comps, struct ore_layout *layout);
 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);