diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/linux/adfs_fs.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/adfs_fs.h')
-rw-r--r-- | include/linux/adfs_fs.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/adfs_fs.h b/include/linux/adfs_fs.h new file mode 100644 index 000000000..4836e382a --- /dev/null +++ b/include/linux/adfs_fs.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ADFS_FS_H +#define _ADFS_FS_H + +#include <uapi/linux/adfs_fs.h> + +/* + * Calculate the boot block checksum on an ADFS drive. Note that this will + * appear to be correct if the sector contains all zeros, so also check that + * the disk size is non-zero!!! + */ +static inline int adfs_checkbblk(unsigned char *ptr) +{ + unsigned int result = 0; + unsigned char *p = ptr + 511; + + do { + result = (result & 0xff) + (result >> 8); + result = result + *--p; + } while (p != ptr); + + return (result & 0xff) != ptr[511]; +} +#endif |