exofs: Rename raid engine from exofs/ios.c => ore

ORE stands for "Objects Raid Engine"

This patch is a mechanical rename of everything that was in ios.c
and its API declaration to an ore.c and an osd_ore.h header. The ore
engine will later be used by the pnfs objects layout driver.

* File ios.c => ore.c

* Declaration of types and API are moved from exofs.h to a new
  osd_ore.h

* All used types are prefixed by ore_ from their exofs_ name.

* Shift includes from exofs.h to osd_ore.h so osd_ore.h is
  independent, include it from exofs.h.

Other than a pure rename there are no other changes. Next patch
will move the ore into it's own module and will export the API
to be used by exofs and later the layout driver

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

1 files changed, 12 insertions, 107 deletions

diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 39ad50165162..f4e442ec7445 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -36,7 +36,8 @@
 #include <linux/fs.h>
 #include <linux/time.h>
 #include <linux/backing-dev.h>
-#include <linux/pnfs_osd_xdr.h>
+#include <scsi/osd_ore.h>
+
 #include "common.h"
 
 #define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
@@ -52,33 +53,6 @@
 /* u64 has problems with printk this will cast it to unsigned long long */
 #define _LLU(x) (unsigned long long)(x)
 
-struct exofs_comp {
-        struct osd_obj_id       obj;
-        u8                      cred[OSD_CAP_LEN];
-};
-
-struct exofs_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 exofs_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 exofs_comp *comps;
-        struct osd_dev  **ods;                  /* osd_dev array              */
-};
-
 /*
  * our extension to the in-memory superblock
  */
@@ -95,9 +69,9 @@ struct exofs_sb_info {
         struct pnfs_osd_data_map data_map;      /* Default raid to use
                                                  * FIXME: Needed ?
                                                  */
-        struct exofs_layout     layout;         /* Default files layout       */
-        struct exofs_comp one_comp;             /* id & cred of partition id=0*/
-        struct exofs_components comps;          /* comps for the partition    */
+        struct ore_layout       layout;         /* Default files layout       */
+        struct ore_comp one_comp;               /* id & cred of partition id=0*/
+        struct ore_components comps;            /* comps for the partition    */
         struct osd_dev  *_min_one_dev[1];       /* Place holder for one dev   */
 };
 
@@ -111,8 +85,8 @@ struct exofs_i_info {
         uint32_t       i_data[EXOFS_IDATA];/*short symlink names and device #s*/
         uint32_t       i_dir_start_lookup; /* which page to start lookup      */
         uint64_t       i_commit_size;      /* the object's written length     */
-        struct exofs_comp one_comp;        /* same component for all devices  */
-        struct exofs_components comps;     /* inode view of the device table  */
+        struct ore_comp one_comp;          /* same component for all devices  */
+        struct ore_components comps;       /* inode view of the device table  */
 };
 
 static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
@@ -120,53 +94,6 @@ static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
         return oi->vfs_inode.i_ino + EXOFS_OBJ_OFF;
 }
 
-struct exofs_io_state;
-typedef void (*exofs_io_done_fn)(struct exofs_io_state *ios, void *private);
-
-struct exofs_io_state {
-        struct kref             kref;
-
-        void                    *private;
-        exofs_io_done_fn        done;
-
-        struct exofs_layout     *layout;
-        struct exofs_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 exofs_per_dev_state {
-                struct osd_request *or;
-                struct bio *bio;
-                loff_t offset;
-                unsigned length;
-                unsigned dev;
-        } per_dev[];
-};
-
-static inline unsigned exofs_io_state_size(unsigned numdevs)
-{
-        return sizeof(struct exofs_io_state) +
-                sizeof(struct exofs_per_dev_state) * numdevs;
-}
-
 /*
  * our inode flags
  */
@@ -219,30 +146,8 @@ static inline struct exofs_i_info *exofs_i(struct inode *inode)
  * function declarations *
  *************************/
 
-/* ios.c */
-int exofs_get_rw_state(struct exofs_layout *layout,
-                       struct exofs_components *comps,
-                       bool is_reading, u64 offset, u64 length,
-                       struct exofs_io_state **ios);
-int exofs_get_io_state(struct exofs_layout *layout,
-                       struct exofs_components *comps,
-                       struct exofs_io_state **ios);
-void exofs_put_io_state(struct exofs_io_state *ios);
-
-int exofs_check_io(struct exofs_io_state *ios, u64 *resid);
-
-int exofs_sbi_create(struct exofs_io_state *ios);
-int exofs_sbi_remove(struct exofs_io_state *ios);
-int exofs_sbi_write(struct exofs_io_state *ios);
-int exofs_sbi_read(struct exofs_io_state *ios);
-int exofs_truncate(struct exofs_layout *layout, struct exofs_components *comps,
-                 u64 size);
-
-int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr);
-extern const struct osd_attr g_attr_logical_length;
-
 /* inode.c               */
-unsigned exofs_max_io_pages(struct exofs_layout *layout,
+unsigned exofs_max_io_pages(struct ore_layout *layout,
                             unsigned expected_pages);
 int exofs_setattr(struct dentry *, struct iattr *);
 int exofs_write_begin(struct file *file, struct address_space *mapping,
@@ -292,8 +197,8 @@ extern const struct inode_operations exofs_special_inode_operations;
 extern const struct inode_operations exofs_symlink_inode_operations;
 extern const struct inode_operations exofs_fast_symlink_inode_operations;
 
-/* exofs_init_comps will initialize an exofs_components device array
- * pointing to a single exofs_comp struct, and a round-robin view
+/* exofs_init_comps will initialize an ore_components device array
+ * pointing to a single ore_comp struct, and a round-robin view
  * of the device table.
  * The first device of each inode is the [inode->ino % num_devices]
  * and the rest of the devices sequentially following where the
@@ -302,8 +207,8 @@ extern const struct inode_operations exofs_fast_symlink_inode_operations;
  * bigger and that the device table repeats twice.
  * See: exofs_read_lookup_dev_table()
  */
-static inline void exofs_init_comps(struct exofs_components *comps,
-                                    struct exofs_comp *one_comp,
+static inline void exofs_init_comps(struct ore_components *comps,
+                                    struct ore_comp *one_comp,
                                     struct exofs_sb_info *sbi, osd_id oid)
 {
         unsigned dev_mod = (unsigned)oid, first_dev;