Re: [2.4.18] vfat doesn't support files > 2GB under Linux, under Windoze it does

[OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>]

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F ker <f_ker@yahoo.co.uk> writes:

> Could someone direct me towards a patch?  Many thanks.

This patch is for 2.5.19, but, the back porting to 2.5.18 should
be not difficult.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>


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diff -urN linux-2.5.19/fs/buffer.c fat-big_file-2.5.19/fs/buffer.c
--- linux-2.5.19/fs/buffer.c	Sat Jun  8 03:33:39 2002
+++ fat-big_file-2.5.19/fs/buffer.c	Sat Jun  8 01:29:20 2002
@@ -1931,7 +1931,7 @@
  */
 
 int cont_prepare_write(struct page *page, unsigned offset,
-		unsigned to, get_block_t *get_block, unsigned long *bytes)
+		unsigned to, get_block_t *get_block, loff_t *bytes)
 {
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
diff -urN linux-2.5.19/fs/fat/file.c fat-big_file-2.5.19/fs/fat/file.c
--- linux-2.5.19/fs/fat/file.c	Sat Jun  8 03:33:40 2002
+++ fat-big_file-2.5.19/fs/fat/file.c	Sat Jun  8 01:56:24 2002
@@ -54,7 +54,7 @@
 	}
 	if (!create)
 		return 0;
-	if (iblock << sb->s_blocksize_bits != MSDOS_I(inode)->mmu_private) {
+	if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {
 		BUG();
 		return -EIO;
 	}
diff -urN linux-2.5.19/fs/fat/inode.c fat-big_file-2.5.19/fs/fat/inode.c
--- linux-2.5.19/fs/fat/inode.c	Sat Jun  8 03:33:40 2002
+++ fat-big_file-2.5.19/fs/fat/inode.c	Sat Jun  8 01:31:41 2002
@@ -775,6 +775,8 @@
 		sbi->fat_length = CF_LE_L(b->fat32_length);
 		sbi->root_cluster = CF_LE_L(b->root_cluster);
 
+		sb->s_maxbytes = 0xffffffff;
+		
 		/* MC - if info_sector is 0, don't multiply by 0 */
 		sbi->fsinfo_sector = CF_LE_W(b->info_sector);
 		if (sbi->fsinfo_sector == 0)
diff -urN linux-2.5.19/include/linux/buffer_head.h fat-big_file-2.5.19/include/linux/buffer_head.h
--- linux-2.5.19/include/linux/buffer_head.h	Sat Jun  8 03:33:58 2002
+++ fat-big_file-2.5.19/include/linux/buffer_head.h	Sat Jun  8 01:31:01 2002
@@ -197,7 +197,7 @@
 int block_read_full_page(struct page*, get_block_t*);
 int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
 int cont_prepare_write(struct page*, unsigned, unsigned, get_block_t*,
-				unsigned long *);
+				loff_t *);
 int generic_cont_expand(struct inode *inode, loff_t size) ;
 int block_commit_write(struct page *page, unsigned from, unsigned to);
 int block_sync_page(struct page *);
diff -urN linux-2.5.19/include/linux/msdos_fs_i.h fat-big_file-2.5.19/include/linux/msdos_fs_i.h
--- linux-2.5.19/include/linux/msdos_fs_i.h	Sat Jun  8 03:33:59 2002
+++ fat-big_file-2.5.19/include/linux/msdos_fs_i.h	Sat Jun  8 01:43:41 2002
@@ -8,7 +8,7 @@
  */
 
 struct msdos_inode_info {
-	unsigned long mmu_private;
+	loff_t mmu_private;
 	int i_start;	/* first cluster or 0 */
 	int i_logstart;	/* logical first cluster */
 	int i_attrs;	/* unused attribute bits */