diff options
| author | Andrew Morton <akpm@osdl.org> | 2003-12-29 23:45:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.osdl.org> | 2003-12-29 23:45:48 -0800 |
| commit | 2d5acefc5f25e56639b020ea2a749a220736dc6e (patch) | |
| tree | f72d41aaa604d3cfd0de01d5f4d72238410005da /include | |
| parent | d97a51101ac90aa64cde14ffb5fe2827a7cf60c8 (diff) | |
[PATCH] FAT: Add count of clusters check in fat_fill_super() (7/10)
From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
This adds the check of count of clusters. And if it's too big, fat driver
can't handle it. So doesn't recognize this as fatfs.
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/msdos_fs.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h index 8c969199ee02..f5c6209bc8f1 100644 --- a/include/linux/msdos_fs.h +++ b/include/linux/msdos_fs.h @@ -55,24 +55,29 @@ #define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ #define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ -#define MSDOS_FAT12 4084 /* maximum number of clusters in a 12 bit FAT */ - /* media of boot sector */ #define FAT_VALID_MEDIA(x) ((0xF8 <= (x) && (x) <= 0xFF) || (x) == 0xF0) #define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) +/* maximum number of clusters */ +#define MAX_FAT12 0xFF4 +#define MAX_FAT16 0xFFF4 +#define MAX_FAT32 0x0FFFFFF6 +#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \ + MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) + /* bad cluster mark */ #define BAD_FAT12 0xFF7 #define BAD_FAT16 0xFFF7 -#define BAD_FAT32 0xFFFFFF7 +#define BAD_FAT32 0x0FFFFFF7 #define BAD_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? BAD_FAT32 : \ MSDOS_SB(s)->fat_bits == 16 ? BAD_FAT16 : BAD_FAT12) /* standard EOF */ #define EOF_FAT12 0xFFF #define EOF_FAT16 0xFFFF -#define EOF_FAT32 0xFFFFFFF +#define EOF_FAT32 0x0FFFFFFF #define EOF_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? EOF_FAT32 : \ MSDOS_SB(s)->fat_bits == 16 ? EOF_FAT16 : EOF_FAT12) |