[XFS] Add parameters to xfs_bmapi() and xfs_bunmapi() to have them report

the range spanned by modifications to the in-core extent map.  Add
XFS_BUNMAPI() and XFS_SWAP_EXTENTS() macros that call xfs_bunmapi() and
xfs_swap_extents() via the ioops vector. Change all calls that may modify
the in-core extent map for the data fork to go through the ioops vector. 
This allows a cache of extent map data to be kept in sync.

SGI-PV: 947615
SGI-Modid: xfs-linux-melb:xfs-kern:209226a

Signed-off-by: Olaf Weber <olaf@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 20 insertions, 3 deletions

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 668ad23fd37c..a682eb558102 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -63,6 +63,8 @@ struct xfs_perag;
 struct xfs_iocore;
 struct xfs_bmbt_irec;
 struct xfs_bmap_free;
+struct xfs_extdelta;
+struct xfs_swapext;
 
 extern struct vfsops xfs_vfsops;
 extern struct vnodeops xfs_vnodeops;
@@ -194,7 +196,12 @@ typedef int		(*xfs_bmapi_t)(struct xfs_trans *, void *,
                                 xfs_fileoff_t, xfs_filblks_t, int,
                                 xfs_fsblock_t *, xfs_extlen_t,
                                 struct xfs_bmbt_irec *, int *,
-                                struct xfs_bmap_free *);
+                                struct xfs_bmap_free *, struct xfs_extdelta *);
+typedef int             (*xfs_bunmapi_t)(struct xfs_trans *,
+                                void *, xfs_fileoff_t,
+                                xfs_filblks_t, int, xfs_extnum_t,
+                                xfs_fsblock_t *, struct xfs_bmap_free *,
+                                struct xfs_extdelta *, int *);
 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 typedef int             (*xfs_iomap_write_direct_t)(
                                 void *, xfs_off_t, size_t, int,
@@ -214,10 +221,13 @@ typedef int		(*xfs_lock_nowait_t)(void *, uint);
 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 typedef xfs_fsize_t     (*xfs_iodone_t)(struct vfs *);
+typedef int             (*xfs_swap_extents_t)(void *, void *,
+                                struct xfs_swapext*);
 
 typedef struct xfs_ioops {
         xfs_ioinit_t                    xfs_ioinit;
         xfs_bmapi_t                     xfs_bmapi_func;
+        xfs_bunmapi_t                   xfs_bunmapi_func;
         xfs_bmap_eof_t                  xfs_bmap_eof_func;
         xfs_iomap_write_direct_t        xfs_iomap_write_direct;
         xfs_iomap_write_delay_t         xfs_iomap_write_delay;
@@ -230,13 +240,17 @@ typedef struct xfs_ioops {
         xfs_unlk_t                      xfs_unlock;
         xfs_size_t                      xfs_size_func;
         xfs_iodone_t                    xfs_iodone;
+        xfs_swap_extents_t              xfs_swap_extents_func;
 } xfs_ioops_t;
 
 #define XFS_IOINIT(vfsp, args, flags) \
         (*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)
-#define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)     \
+#define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist,delta) \
         (*(mp)->m_io_ops.xfs_bmapi_func) \
-                (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)
+                (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist,delta)
+#define XFS_BUNMAPI(mp, trans,io,bno,len,f,nexts,first,flist,delta,done) \
+        (*(mp)->m_io_ops.xfs_bunmapi_func) \
+                (trans,(io)->io_obj,bno,len,f,nexts,first,flist,delta,done)
 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
                 ((io)->io_obj, endoff, whichfork, eof)
@@ -266,6 +280,9 @@ typedef struct xfs_ioops {
         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 #define XFS_IODONE(vfsp) \
         (*(mp)->m_io_ops.xfs_iodone)(vfsp)
+#define XFS_SWAP_EXTENTS(mp, io, tio, sxp) \
+        (*(mp)->m_io_ops.xfs_swap_extents_func) \
+                ((io)->io_obj, (tio)->io_obj, sxp)
 
 #ifdef HAVE_PERCPU_SB