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Subject[PATCH] fat: fat16 support maximum 4GB file/vol size as WinXP or 7.
Date
FAT16 support maximum 4GB vol/file size with 64KB cluster size.

Win NT/XP/7 increased the maximum cluster size to 64KB, and file/vol size increased 4GB also.
Although increasing, the file size of linux FAT is still limited at 2GB.
I found that it is limited by sb->maxbytes(0x7fffffff) when partition is formatted by FAT16.
sb->s_maxbytes in fill_super should be set to 0xffffffff like fat32.

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
---
fs/fat/inode.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 5942fec..f2dce50 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1367,6 +1367,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
sbi->free_clusters = -1; /* Don't know yet */
sbi->free_clus_valid = 0;
sbi->prev_free = FAT_START_ENT;
+ sb->s_maxbytes = 0xffffffff;

if (!sbi->fat_length && b->fat32_length) {
struct fat_boot_fsinfo *fsinfo;
@@ -1377,8 +1378,6 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
sbi->fat_length = le32_to_cpu(b->fat32_length);
sbi->root_cluster = le32_to_cpu(b->root_cluster);

- sb->s_maxbytes = 0xffffffff;
-
/* MC - if info_sector is 0, don't multiply by 0 */
sbi->fsinfo_sector = le16_to_cpu(b->info_sector);
if (sbi->fsinfo_sector == 0)
--
1.7.4.4


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