udf: Fix handling of multisession media

According to OSTA UDF specification, only anchor blocks and primary volume
descriptors are placed on media relative to the last session. All other block
numbers are absolute (in the partition or the whole media). This seems to be
confirmed by multisession media created by other systems.

Signed-off-by: Sebastian Manciulea <manciuleas@yahoo.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/misc.c

@@ -203,16 +203,15 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
 {
 	tag *tag_p;
 	struct buffer_head *bh = NULL;
-	struct udf_sb_info *sbi = UDF_SB(sb);
 
 	/* Read the block */
 	if (block == 0xFFFFFFFF)
 		return NULL;
 
-	bh = udf_tread(sb, block + sbi->s_session);
+	bh = udf_tread(sb, block);
 	if (!bh) {
 		udf_debug("block=%d, location=%d: read failed\n",
-			  block + sbi->s_session, location);
+			  block, location);
 		return NULL;
 	}
 
@@ -222,8 +221,7 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
 
 	if (location != le32_to_cpu(tag_p->tagLocation)) {
 		udf_debug("location mismatch block %u, tag %u != %u\n",
-			  block + sbi->s_session,
-			  le32_to_cpu(tag_p->tagLocation), location);
+			  block, le32_to_cpu(tag_p->tagLocation), location);
 		goto error_out;
 	}
 
@@ -247,9 +245,8 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
 					le16_to_cpu(tag_p->descCRCLength), 0))
 		return bh;
 
-	udf_debug("Crc failure block %d: crc = %d, crclen = %d\n",
-		  block + sbi->s_session, le16_to_cpu(tag_p->descCRC),
-		  le16_to_cpu(tag_p->descCRCLength));
+	udf_debug("Crc failure block %d: crc = %d, crclen = %d\n", block,
+	    le16_to_cpu(tag_p->descCRC), le16_to_cpu(tag_p->descCRCLength));
 
 error_out:
 	brelse(bh);

fs/udf/super.c

@@ -587,7 +587,7 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
 static int udf_vrs(struct super_block *sb, int silent)
 {
 	struct volStructDesc *vsd = NULL;
-	int sector = 32768;
+	loff_t sector = 32768;
 	int sectorsize;
 	struct buffer_head *bh = NULL;
 	int iso9660 = 0;