Implement ->page_mkwrite in XFS.
Signed-Off-By: Dave Chinner <dgc@xxxxxxx>
---
fs/xfs/linux-2.6/xfs_file.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
Index: 2.6.x-xfs-new/fs/xfs/linux-2.6/xfs_file.c
===================================================================
--- 2.6.x-xfs-new.orig/fs/xfs/linux-2.6/xfs_file.c 2007-02-07 23:00:10.000000000 +1100
+++ 2.6.x-xfs-new/fs/xfs/linux-2.6/xfs_file.c 2007-02-07 23:15:20.170880823 +1100
@@ -446,6 +446,20 @@ 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,
@@ -503,12 +517,14 @@ const struct file_operations xfs_dir_fil
static struct vm_operations_struct xfs_file_vm_ops = {
.nopage = filemap_nopage,
.populate = filemap_populate,
+ .page_mkwrite = xfs_vm_page_mkwrite,
};
#ifdef HAVE_DMAPI
static struct vm_operations_struct xfs_dmapi_file_vm_ops = {
.nopage = xfs_vm_nopage,
.populate = filemap_populate,
+ .page_mkwrite = xfs_vm_page_mkwrite,
#ifdef HAVE_VMOP_MPROTECT
.mprotect = xfs_vm_mprotect,
#endif
-
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