Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / fs / libfs.c

diff --git a/fs/libfs.c b/fs/libfs.c
index 80046dd..ddfa899 100644 (file)
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -9,6 +9,8 @@
 #include <linux/vfs.h>
 #include <linux/mutex.h>
 #include <linux/exportfs.h>
+#include <linux/writeback.h>
+#include <linux/buffer_head.h>
 
 #include <asm/uaccess.h>
 
@@ -807,6 +809,29 @@ struct dentry *generic_fh_to_parent(struct super_block *sb, struct fid *fid,
 }
 EXPORT_SYMBOL_GPL(generic_fh_to_parent);
 
+int simple_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+       struct writeback_control wbc = {
+               .sync_mode = WB_SYNC_ALL,
+               .nr_to_write = 0, /* metadata-only; caller takes care of data */
+       };
+       struct inode *inode = dentry->d_inode;
+       int err;
+       int ret;
+
+       ret = sync_mapping_buffers(inode->i_mapping);
+       if (!(inode->i_state & I_DIRTY))
+               return ret;
+       if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+               return ret;
+
+       err = sync_inode(inode, &wbc);
+       if (ret == 0)
+               ret = err;
+       return ret;
+}
+EXPORT_SYMBOL(simple_fsync);
+
 EXPORT_SYMBOL(dcache_dir_close);
 EXPORT_SYMBOL(dcache_dir_lseek);
 EXPORT_SYMBOL(dcache_dir_open);