hfsplus: simplify fsync

Remove lots of code we don't need from fsync, we just need to call
->write_inode on the inode if it's dirty, for which sync_inode_metadata
is a lot more efficient than write_inode_now, and we need to write
out the various metadata inodes, which we now do explicitly instead
of by calling ->sync_fs.

Signed-off-by: Christoph Hellwig <hch@tuxera.com>

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 8afd7e8..be68961 100644 (file)
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -302,29 +302,28 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
        return 0;
 }
 
-static int hfsplus_file_fsync(struct file *filp, int datasync)
+static int hfsplus_file_fsync(struct file *file, int datasync)
 {
-       struct inode *inode = filp->f_mapping->host;
-       struct super_block * sb;
-       int ret, err;
-
-       /* sync the inode to buffers */
-       ret = write_inode_now(inode, 0);
-
-       /* sync the superblock to buffers */
-       sb = inode->i_sb;
-       if (sb->s_dirt) {
-               if (!(sb->s_flags & MS_RDONLY))
-                       hfsplus_sync_fs(sb, 1);
-               else
-                       sb->s_dirt = 0;
-       }
+       struct inode *inode = file->f_mapping->host;
+       struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
+       int error, error2;
 
-       /* .. finally sync the buffers to disk */
-       err = sync_blockdev(sb->s_bdev);
-       if (!ret)
-               ret = err;
-       return ret;
+       /*
+        * Sync inode metadata into the catalog and extent trees.
+        */
+       sync_inode_metadata(inode, 1);
+
+       /*
+        * And explicitly write out the btrees.
+        */
+       error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
+       error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
+       if (!error)
+               error = error2;
+       error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
+       if (!error)
+               error = error2;
+       return error;
 }
 
 static const struct inode_operations hfsplus_file_inode_operations = {