[PATCH v2 0/2] fat: Add FS_IOC_GETFSLABEL / FS_IOC_SETFSLABEL ioctls

[Ethan Ferguson]

Add support for reading / writing to the volume label of a FAT filesystem
via the FS_IOC_GETFSLABEL and FS_IOC_SETFSLABEL ioctls.

Volume label changes are persisted in the volume label dentry in the root
directory as well as the bios parameter block.

v2:
* Create volume label dentry if not present
* Respect msdos shortname rules
* Add locking
* Fixed bugs (EFAULT from copy_to_user, uninitialized buffer_head)

Ethan Ferguson (2):
  fat: Add FS_IOC_GETFSLABEL ioctl
  fat: Add FS_IOC_SETFSLABEL ioctl

 fs/fat/dir.c         | 51 ++++++++++++++++++++++++++++
 fs/fat/fat.h         |  7 ++++
 fs/fat/file.c        | 79 ++++++++++++++++++++++++++++++++++++++++++++
 fs/fat/inode.c       | 26 +++++++++++++--
 fs/fat/namei_msdos.c |  4 +--
 5 files changed, 163 insertions(+), 4 deletions(-)

base-commit: 9f2693489ef8558240d9e80bfad103650daed0af
-- 
2.43.0