fix minixfs block limit check

Hello, all. On minix2 and minix3 usually max_size is 7fffffff and the check in question prohibits creation of last block spanning right before 7fffffff. Here is a fix:

--- fs/minix/itree_v2.c 2011-04-23 01:34:36.363725380 +0200
+++ /home/phcoder/projects/fs/minix/itree_v2.c 2012-05-09
21:47:52.335621065 +0200
@@ -32,7 +32,8 @@

     if (block < 0) {
         printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
             block, bdevname(sb->s_bdev, b));

- } else if (block >=
(minix_sb(inode->i_sb)->s_max_size/sb->s_blocksize)) {
+ } else if ((u64) block * (u64) sb->s_blocksize
+ >= minix_sb(inode->i_sb)->s_max_size) {
if (printk_ratelimit())
printk("MINIX-fs: block_to_path: "

Regards
Vladimir 'φ-coder/phcoder' Serbinenko

Since it was ignored on LKML, I guess this should be the right place to send this patch to.

-------- Original Message --------
Subject: [PATCH] fix minixfs block limit check
Date: Wed, 09 May 2012 22:11:01 +0200
From: Vladimir 'φ-coder/phcoder' Serbinenko <[email protected]>
To: [email protected]

Hello, all. On minix2 and minix3 usually max_size is 7fffffff and the check in question prohibits creation of last block spanning right before 7fffffff. Here is a fix:

--- fs/minix/itree_v2.c 2011-04-23 01:34:36.363725380 +0200
+++ /home/phcoder/projects/fs/minix/itree_v2.c 2012-05-09
21:47:52.335621065 +0200
@@ -32,7 +32,8 @@

     if (block < 0) {
         printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
             block, bdevname(sb->s_bdev, b));

- } else if (block >=
(minix_sb(inode->i_sb)->s_max_size/sb->s_blocksize)) {
+ } else if ((u64) block * (u64) sb->s_blocksize
+ >= minix_sb(inode->i_sb)->s_max_size) {
if (printk_ratelimit())
printk("MINIX-fs: block_to_path: "

Regards
Vladimir 'φ-coder/phcoder' Serbinenko