[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, 49 insertions, 25 deletions

diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index 4968a6358e61..99daf8c0f900 100644
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
@@ -54,24 +54,14 @@ xfs_swapext(
         xfs_swapext_t   __user *sxu)
 {
         xfs_swapext_t   *sxp;
-        xfs_inode_t     *ip=NULL, *tip=NULL, *ips[2];
-        xfs_trans_t     *tp;
+        xfs_inode_t     *ip=NULL, *tip=NULL;
         xfs_mount_t     *mp;
-        xfs_bstat_t     *sbp;
         struct file     *fp = NULL, *tfp = NULL;
         vnode_t         *vp, *tvp;
-        static uint     lock_flags = XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL;
-        int             ilf_fields, tilf_fields;
         int             error = 0;
-        xfs_ifork_t     *tempifp, *ifp, *tifp;
-        __uint64_t      tmp;
-        int             aforkblks = 0;
-        int             taforkblks = 0;
-        char            locked = 0;
 
         sxp = kmem_alloc(sizeof(xfs_swapext_t), KM_MAYFAIL);
-        tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
-        if (!sxp || !tempifp) {
+        if (!sxp) {
                 error = XFS_ERROR(ENOMEM);
                 goto error0;
         }
@@ -118,14 +108,56 @@ xfs_swapext(
 
         mp = ip->i_mount;
 
-        sbp = &sxp->sx_stat;
-
         if (XFS_FORCED_SHUTDOWN(mp)) {
                 error =  XFS_ERROR(EIO);
                 goto error0;
         }
 
-        locked = 1;
+        error = XFS_SWAP_EXTENTS(mp, &ip->i_iocore, &tip->i_iocore, sxp);
+
+ error0:
+        if (fp != NULL)
+                fput(fp);
+        if (tfp != NULL)
+                fput(tfp);
+
+        if (sxp != NULL)
+                kmem_free(sxp, sizeof(xfs_swapext_t));
+
+        return error;
+}
+
+int
+xfs_swap_extents(
+        xfs_inode_t     *ip,
+        xfs_inode_t     *tip,
+        xfs_swapext_t   *sxp)
+{
+        xfs_mount_t     *mp;
+        xfs_inode_t     *ips[2];
+        xfs_trans_t     *tp;
+        xfs_bstat_t     *sbp = &sxp->sx_stat;
+        vnode_t         *vp, *tvp;
+        xfs_ifork_t     *tempifp, *ifp, *tifp;
+        int             ilf_fields, tilf_fields;
+        static uint     lock_flags = XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL;
+        int             error = 0;
+        int             aforkblks = 0;
+        int             taforkblks = 0;
+        __uint64_t      tmp;
+        char            locked = 0;
+
+        mp = ip->i_mount;
+
+        tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
+        if (!tempifp) {
+                error = XFS_ERROR(ENOMEM);
+                goto error0;
+        }
+
+        sbp = &sxp->sx_stat;
+        vp = XFS_ITOV(ip);
+        tvp = XFS_ITOV(tip);
 
         /* Lock in i_ino order */
         if (ip->i_ino < tip->i_ino) {
@@ -137,6 +169,7 @@ xfs_swapext(
         }
 
         xfs_lock_inodes(ips, 2, 0, lock_flags);
+        locked = 1;
 
         /* Check permissions */
         error = xfs_iaccess(ip, S_IWUSR, NULL);
@@ -360,16 +393,7 @@ xfs_swapext(
                 xfs_iunlock(ip,  lock_flags);
                 xfs_iunlock(tip, lock_flags);
         }
-
-        if (fp != NULL)
-                fput(fp);
-        if (tfp != NULL)
-                fput(tfp);
-
-        if (sxp != NULL)
-                kmem_free(sxp, sizeof(xfs_swapext_t));
         if (tempifp != NULL)
                 kmem_free(tempifp, sizeof(xfs_ifork_t));
-
         return error;
 }