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-rw-r--r--fs/ext2/fsync.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/fs/ext2/fsync.c b/fs/ext2/fsync.c
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+++ b/fs/ext2/fsync.c
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+/*
+ * linux/fs/ext2/fsync.c
+ *
+ * Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
+ * from
+ * Copyright (C) 1992 Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ * from
+ * linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * ext2fs fsync primitive
+ *
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ *
+ * Removed unnecessary code duplication for little endian machines
+ * and excessive __inline__s.
+ * Andi Kleen, 1997
+ *
+ * Major simplications and cleanup - we only need to do the metadata, because
+ * we can depend on generic_block_fdatasync() to sync the data blocks.
+ */
+
+#include "ext2.h"
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h> /* for fsync_inode_buffers() */
+
+
+/*
+ * File may be NULL when we are called. Perhaps we shouldn't
+ * even pass file to fsync ?
+ */
+
+int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
+{
+ 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 = ext2_sync_inode(inode);
+ if (ret == 0)
+ ret = err;
+ return ret;
+}