Add support for reading / writing to the exfat volume label from the FS_IOC_GETFSLABEL and FS_IOC_SETFSLABEL ioctls. Implemented in similar ways to other fs drivers, namely btrfs and ext4, where the ioctls are performed on file inodes. NOTE: I have not implemented allocating a new cluster in this patch. This is because I am having trouble with using exfat_alloc_cluster. I have submitted this patch so that while I debug this error, I can receive comments on the rest of my changes. Any pointers in the right direction would be appreciated! v3: Add lazy-loading of volume label into superblock. Use better UTF-16 conversions to detect invalid characters. If no volume label entry exists, overwrite a deleted dentry, or create a new dentry if the cluster has space. v2: Fix endianness conversion as reported by kernel test robot Link: https://lore.kernel.org/all/20250817003046.313497-1-ethan.ferguson@xxxxxxxxxx/ v1: Link: https://lore.kernel.org/all/20250815171056.103751-1-ethan.ferguson@xxxxxxxxxx/ Ethan Ferguson (1): exfat: Add support for FS_IOC_{GET,SET}FSLABEL fs/exfat/exfat_fs.h | 3 + fs/exfat/exfat_raw.h | 6 ++ fs/exfat/file.c | 78 ++++++++++++++++++ fs/exfat/super.c | 190 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 277 insertions(+) -- 2.34.1
