ext4: Restore wbc->range_start in ext4_da_writepages()

[safe/jmp/linux-2.6] / fs / ext4 / fsync.c

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 2a167d7..83cf641 100644 (file)
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -27,8 +27,12 @@
 #include <linux/sched.h>
 #include <linux/writeback.h>
 #include <linux/jbd2.h>
-#include <linux/ext4_fs.h>
-#include <linux/ext4_jbd2.h>
+#include <linux/blkdev.h>
+
+#include "ext4.h"
+#include "ext4_jbd2.h"
+
+#include <trace/events/ext4.h>
 
 /*
  * akpm: A new design for ext4_sync_file().
@@ -42,12 +46,15 @@
  * inode to disk.
  */
 
-int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
+int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync)
 {
        struct inode *inode = dentry->d_inode;
+       journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
        int ret = 0;
 
-       J_ASSERT(ext4_journal_current_handle() == 0);
+       J_ASSERT(ext4_journal_current_handle() == NULL);
+
+       trace_ext4_sync_file(file, dentry, datasync);
 
        /*
         * data=writeback:
@@ -72,6 +79,9 @@ int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
                goto out;
        }
 
+       if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+               goto out;
+
        /*
         * The VFS has written the file data.  If the inode is unaltered
         * then we need not start a commit.
@@ -82,6 +92,8 @@ int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
                        .nr_to_write = 0, /* sys_fsync did this */
                };
                ret = sync_inode(inode, &wbc);
+               if (journal && (journal->j_flags & JBD2_BARRIER))
+                       blkdev_issue_flush(inode->i_sb->s_bdev, NULL);
        }
 out:
        return ret;