The FAT filesystem partition volume label can be read with FAT_IOCTL_GET_VOLUME_LABEL and written with FAT_IOCTL_SET_VOLUME_LABEL.
FAT volume label (volume name) is exactly same stored in boot sector and root directory. Thus, the boot sector just needs to be upgrade when the label writing. And, Ignore the volume label in struct msdos_sb_info. The volume label format reference from Pali Rohár <[email protected]> testing results in the previous mail. v9: 1. Add necessary lock to protect write method. 2. Fix some code bug. v8...v1: write the patch Chen Guanqiao (3): fs: fat: Add fat filesystem partition volume label in local structure fs: fat: Add volume label entry method function fs: fat: add ioctl method in fat filesystem driver fs/fat/dir.c | 47 ++++++++++++++ fs/fat/fat.h | 6 ++ fs/fat/file.c | 145 ++++++++++++++++++++++++++++++++++++++++++ fs/fat/inode.c | 6 ++ include/uapi/linux/msdos_fs.h | 2 + 5 files changed, 206 insertions(+) -- 2.14.3
