[PATCH] befs: LBD support

From: "Sergey S. Kostyliov" <rathamahata@php4.ru>

LBD patch merged long time ago, so it is safe to pass u64 block numbers to
sb_bread() when sector_t is large enough.

fs/befs/befs.h

@@ -14,10 +14,7 @@
 #define BEFS_VERSION "0.9.3"
 
 
-/* Sector_t makes this sillyness obsolete */
 typedef u64 befs_blocknr_t;
-typedef u32 vfs_blocknr_t;
-
 /*
  * BeFS in memory structures
  */

fs/befs/io.c

@@ -28,7 +28,6 @@ befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
 {
 	struct buffer_head *bh = NULL;
 	befs_blocknr_t block = 0;
-	vfs_blocknr_t vfs_block = 0;
 	befs_sb_info *befs_sb = BEFS_SB(sb);
 
 	befs_debug(sb, "---> Enter befs_read_iaddr() "
@@ -42,17 +41,10 @@ befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
 	}
 
 	block = iaddr2blockno(sb, &iaddr);
-	vfs_block = (vfs_blocknr_t) block;
-
-	if (vfs_block != block) {
-		befs_error(sb, "Error converting to host blocknr_t. %Lu "
-			   "is larger than the host can use", block);
-		goto error;
-	}
 
 	befs_debug(sb, "befs_read_iaddr: offset = %lu", block);
 
-	bh = sb_bread(sb, vfs_block);
+	bh = sb_bread(sb, block);
 
 	if (bh == NULL) {
 		befs_error(sb, "Failed to read block %lu", block);
@@ -71,20 +63,13 @@ struct buffer_head *
 befs_bread(struct super_block *sb, befs_blocknr_t block)
 {
 	struct buffer_head *bh = NULL;
-	vfs_blocknr_t vfs_block = (vfs_blocknr_t) block;
 
 	befs_debug(sb, "---> Enter befs_read() %Lu", block);
 
-	if (vfs_block != block) {
-		befs_error(sb, "Error converting to host blocknr_t. %Lu "
-			   "is larger than the host can use", block);
-		goto error;
-	}
-
-	bh = sb_bread(sb, vfs_block);
+	bh = sb_bread(sb, block);
 
 	if (bh == NULL) {
-		befs_error(sb, "Failed to read block %lu", vfs_block);
+		befs_error(sb, "Failed to read block %lu", block);
 		goto error;
 	}
 

fs/befs/linuxvfs.c

@@ -856,6 +856,13 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
 	if (befs_check_sb(sb) != BEFS_OK)
 		goto unaquire_priv_sbp;
 
+	if( befs_sb->num_blocks > ~((sector_t)0) ) {
+		befs_error(sb, "blocks count: %Lu "
+			"is larger than the host can use",
+			befs_sb->num_blocks);
+		goto unaquire_priv_sbp;
+	}
+
 	/*
 	 * set up enough so that it can read an inode
 	 * Fill in kernel superblock fields from private sb