exofs: Move layout related members to a layout structure

* Abstract away those members in exofs_sb_info that are related/needed
  by a layout into a new exofs_layout structure. Embed it in exofs_sb_info.

* At exofs_io_state receive/keep a pointer to an exofs_layout. No need for
  an exofs_sb_info pointer, all we need is at exofs_layout.

* Change any usage of above exofs_sb_info members to their new name.

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

1 files changed, 18 insertions, 6 deletions

diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 13663da2b119..33c68568b338 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -55,12 +55,18 @@
 /* u64 has problems with printk this will cast it to unsigned long long */
 #define _LLU(x) (unsigned long long)(x)
 
+struct exofs_layout {
+        osd_id          s_pid;                  /* partition ID of file system*/
+
+        unsigned        s_numdevs;              /* Num of devices in array    */
+        struct osd_dev  *s_ods[0];              /* Variable length            */
+};
+
 /*
  * our extension to the in-memory superblock
  */
 struct exofs_sb_info {
         struct exofs_fscb s_fscb;               /* Written often, pre-allocate*/
-        osd_id          s_pid;                  /* partition ID of file system*/
         int             s_timeout;              /* timeout for OSD operations */
         uint64_t        s_nextid;               /* highest object ID used     */
         uint32_t        s_numfiles;             /* number of files on fs      */
@@ -69,9 +75,14 @@ struct exofs_sb_info {
         atomic_t        s_curr_pending;         /* number of pending commands */
         uint8_t         s_cred[OSD_CAP_LEN];    /* credential for the fscb    */
 
-        struct pnfs_osd_data_map data_map;      /* Default raid to use        */
-        unsigned        s_numdevs;              /* Num of devices in array    */
-        struct osd_dev  *s_ods[1];              /* Variable length, minimum 1 */
+        struct pnfs_osd_data_map data_map;      /* Default raid to use
+                                                 * FIXME: Needed ?
+                                                 */
+/*      struct exofs_layout     dir_layout;*/   /* Default dir layout */
+        struct exofs_layout     layout;         /* Default files layout,
+                                                 * contains the variable osd_dev
+                                                 * array. Keep last */
+        struct osd_dev  *_min_one_dev[1];       /* Place holder for one dev   */
 };
 
 /*
@@ -101,7 +112,7 @@ struct exofs_io_state {
         void                    *private;
         exofs_io_done_fn        done;
 
-        struct exofs_sb_info    *sbi;
+        struct exofs_layout     *layout;
         struct osd_obj_id       obj;
         u8                      *cred;
 
@@ -189,7 +200,8 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
 int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
                     u64 offset, void *p, unsigned length);
 
-int  exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios);
+int  exofs_get_io_state(struct exofs_layout *layout,
+                        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);