Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
[sfrench/cifs-2.6.git] / fs / xfs / linux-2.6 / xfs_file.c
index 2d4be2f247b24cfc69efce59a0315f849feafebb..0d4001eafd16861daf44ef05ea0ee7200388dbf7 100644 (file)
@@ -413,6 +413,20 @@ xfs_file_open_exec(
 }
 #endif /* HAVE_FOP_OPEN_EXEC */
 
+/*
+ * mmap()d file has taken write protection fault and is being made
+ * writable. We can set the page state up correctly for a writable
+ * page, which means we can do correct delalloc accounting (ENOSPC
+ * checking!) and unwritten extent mapping.
+ */
+STATIC int
+xfs_vm_page_mkwrite(
+       struct vm_area_struct   *vma,
+       struct page             *page)
+{
+       return block_page_mkwrite(vma, page, xfs_get_blocks);
+}
+
 const struct file_operations xfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
@@ -465,11 +479,13 @@ const struct file_operations xfs_dir_file_operations = {
 
 static struct vm_operations_struct xfs_file_vm_ops = {
        .fault          = filemap_fault,
+       .page_mkwrite   = xfs_vm_page_mkwrite,
 };
 
 #ifdef CONFIG_XFS_DMAPI
 static struct vm_operations_struct xfs_dmapi_file_vm_ops = {
        .fault          = xfs_vm_fault,
+       .page_mkwrite   = xfs_vm_page_mkwrite,
 #ifdef HAVE_VMOP_MPROTECT
        .mprotect       = xfs_vm_mprotect,
 #endif