1 files changed, 96 insertions, 0 deletions

diff --git a/fs/xfs/xfs_fs_subr.c b/fs/xfs/xfs_fs_subr.c
new file mode 100644
index 000000000000..ed88ed16811c
--- /dev/null
+++ b/fs/xfs/xfs_fs_subr.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "xfs.h"
+#include "xfs_vnodeops.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_inode.h"
+#include "xfs_trace.h"
+
+/*
+ * note: all filemap functions return negative error codes. These
+ * need to be inverted before returning to the xfs core functions.
+ */
+void
+xfs_tosspages(
+        xfs_inode_t     *ip,
+        xfs_off_t       first,
+        xfs_off_t       last,
+        int             fiopt)
+{
+        /* can't toss partial tail pages, so mask them out */
+        last &= ~(PAGE_SIZE - 1);
+        truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1);
+}
+
+int
+xfs_flushinval_pages(
+        xfs_inode_t     *ip,
+        xfs_off_t       first,
+        xfs_off_t       last,
+        int             fiopt)
+{
+        struct address_space *mapping = VFS_I(ip)->i_mapping;
+        int             ret = 0;
+
+        trace_xfs_pagecache_inval(ip, first, last);
+
+        xfs_iflags_clear(ip, XFS_ITRUNCATED);
+        ret = filemap_write_and_wait_range(mapping, first,
+                                last == -1 ? LLONG_MAX : last);
+        if (!ret)
+                truncate_inode_pages_range(mapping, first, last);
+        return -ret;
+}
+
+int
+xfs_flush_pages(
+        xfs_inode_t     *ip,
+        xfs_off_t       first,
+        xfs_off_t       last,
+        uint64_t        flags,
+        int             fiopt)
+{
+        struct address_space *mapping = VFS_I(ip)->i_mapping;
+        int             ret = 0;
+        int             ret2;
+
+        xfs_iflags_clear(ip, XFS_ITRUNCATED);
+        ret = -filemap_fdatawrite_range(mapping, first,
+                                last == -1 ? LLONG_MAX : last);
+        if (flags & XBF_ASYNC)
+                return ret;
+        ret2 = xfs_wait_on_pages(ip, first, last);
+        if (!ret)
+                ret = ret2;
+        return ret;
+}
+
+int
+xfs_wait_on_pages(
+        xfs_inode_t     *ip,
+        xfs_off_t       first,
+        xfs_off_t       last)
+{
+        struct address_space *mapping = VFS_I(ip)->i_mapping;
+
+        if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
+                return -filemap_fdatawait_range(mapping, first,
+                                        last == -1 ? ip->i_size - 1 : last);
+        }
+        return 0;
+}