Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

[sfrench/cifs-2.6.git] / fs / xfs / xfs_vnodeops.c

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 79b522779aa485dca1bccbf101d5585f6c2a1d92..1a5ad8cd97b00d3d8cd24c04961ea075cb5e1635 100644 (file)
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -589,7 +589,30 @@ xfs_setattr(
                        code = xfs_igrow_start(ip, vap->va_size, credp);
                }
                xfs_iunlock(ip, XFS_ILOCK_EXCL);
-               vn_iowait(vp); /* wait for the completion of any pending DIOs */
+
+               /*
+                * We are going to log the inode size change in this
+                * transaction so any previous writes that are beyond the on
+                * disk EOF and the new EOF that have not been written out need
+                * to be written here. If we do not write the data out, we
+                * expose ourselves to the null files problem.
+                *
+                * Only flush from the on disk size to the smaller of the in
+                * memory file size or the new size as that's the range we
+                * really care about here and prevents waiting for other data
+                * not within the range we care about here.
+                */
+               if (!code &&
+                   (ip->i_size != ip->i_d.di_size) &&
+                   (vap->va_size > ip->i_d.di_size)) {
+                       code = bhv_vop_flush_pages(XFS_ITOV(ip),
+                                       ip->i_d.di_size, vap->va_size,
+                                       XFS_B_ASYNC, FI_NONE);
+               }
+
+               /* wait for all I/O to complete */
+               vn_iowait(vp);
+
                if (!code)
                        code = xfs_itruncate_data(ip, vap->va_size);
                if (code) {
@@ -4434,9 +4457,12 @@ xfs_free_file_space(
        while (!error && !done) {
 
                /*
-                * allocate and setup the transaction
+                * allocate and setup the transaction. Allow this
+                * transaction to dip into the reserve blocks to ensure
+                * the freeing of the space succeeds at ENOSPC.
                 */
                tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
+               tp->t_flags |= XFS_TRANS_RESERVE;
                error = xfs_trans_reserve(tp,
                                          resblks,
                                          XFS_WRITE_LOG_RES(mp),