UBIFS: fix a couple bugs in UBIFS xattr length calculation

The journal update function did not work for extended attributes properly,
because extended attribute inodes carry the xattr data, and the size of this
data was not taken into account.

Artem: improved commit message, amended the patch a bit.

Signed-off-by: Subodh Nijsure <snijsure@grid-net.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Acked-by: Brad Mouring <brad.mouring@ni.com>
Acked-by: Gratian Crisan <gratian.crisan@ni.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index fb166e2..f6ac3f2 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -571,7 +571,11 @@
 
 	aligned_dlen = ALIGN(dlen, 8);
 	aligned_ilen = ALIGN(ilen, 8);
+
 	len = aligned_dlen + aligned_ilen + UBIFS_INO_NODE_SZ;
+	/* Make sure to also account for extended attributes */
+	len += host_ui->data_len;
+
 	dent = kmalloc(len, GFP_NOFS);
 	if (!dent)
 		return -ENOMEM;
@@ -648,7 +652,8 @@
 
 	ino_key_init(c, &ino_key, dir->i_ino);
 	ino_offs += aligned_ilen;
-	err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs, UBIFS_INO_NODE_SZ);
+	err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs,
+			    UBIFS_INO_NODE_SZ + host_ui->data_len);
 	if (err)
 		goto out_ro;