JFS: do not ignore return code from write_one_page()

There are a couple places where jfs calls write_one_page() where clean
recovery is not possible.  In these cases, the file system should be
marked dirty.  To do this, it is now necessary to store the superblock in
the metapage structure.

Link: http://lkml.kernel.org/r/db45ab67-55c7-08ff-6776-f76b3bf5cbf5@oracle.com
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>

fs/jfs/jfs_metapage.c

@@ -664,6 +664,7 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
 		INCREMENT(mpStat.pagealloc);
 		mp = alloc_metapage(GFP_NOFS);
 		mp->page = page;
+		mp->sb = inode->i_sb;
 		mp->flag = 0;
 		mp->xflag = COMMIT_PAGE;
 		mp->count = 1;
@@ -711,7 +712,8 @@ void force_metapage(struct metapage *mp)
 	get_page(page);
 	lock_page(page);
 	set_page_dirty(page);
-	write_one_page(page);
+	if (write_one_page(page))
+		jfs_error(mp->sb, "write_one_page() failed\n");
 	clear_bit(META_forcewrite, &mp->flag);
 	put_page(page);
 }
@@ -756,7 +758,8 @@ void release_metapage(struct metapage * mp)
 		set_page_dirty(page);
 		if (test_bit(META_sync, &mp->flag)) {
 			clear_bit(META_sync, &mp->flag);
-			write_one_page(page);
+			if (write_one_page(page))
+				jfs_error(mp->sb, "write_one_page() failed\n");
 			lock_page(page); /* write_one_page unlocks the page */
 		}
 	} else if (mp->lsn)	/* discard_metapage doesn't remove it */

fs/jfs/jfs_metapage.h

@@ -38,6 +38,7 @@ struct metapage {
 
 	/* implementation */
 	struct page *page;
+	struct super_block *sb;
 	unsigned int logical_size;
 
 	/* Journal management */