fat: fat16 support maximum 4GB file/vol size as WinXP or 7. (710d4403) · Commits · 戴 / test

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> Signed-off-by:

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

fs/fat/inode.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1365,6 +1365,7 @@ 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;
		@@ -1375,8 +1376,6 @@ 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)

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