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. v7: 1. fixed volume label name check function. 2. automatically local rootdir. 3. remove some lock. 4. fixed some memory leaks. v6: 1. fixed volume label name check function. 2. add volume label entry if no volume label. v5: 1. find the volume label entry through the scan function. 2. the volume label only retains the d-characters (reference from Ecma-107). v4: 1. read/write volume label from/to the location of the respective version. 2. correct volume label check reference from mkfs.fat. 3. fixed some code issue. v3: 1. write volume label both boot sector and root directory. v2: 1. add filesystem version check. 2. add diretory permissions check. 3. add volume label string check. 4. fixed part of return value. 5. fixed some indent issue. 6. remove sync_dirty_buffer(). ChenGuanqiao (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 | 53 ++++++++++++++++ fs/fat/fat.h | 6 ++ fs/fat/file.c | 140 ++++++++++++++++++++++++++++++++++++++++++ fs/fat/inode.c | 15 ++++- include/uapi/linux/msdos_fs.h | 2 + 5 files changed, 213 insertions(+), 3 deletions(-) -- 2.11.0
