Force unmount of fuse severes the connection between FUSE driver and its userspace counterpart. However, open file handles will prevent the superblock from being reclaimed. An attempt to remount the filesystem at the same endpoint will try re-using the superblock, if still present. Since the superblock re-use path doesn't go through the fs-specific superblock setup code, its state in FUSE case is already disfunctional, and that will prevent the mount from succeeding. The patchset adds a possibility to mark the superblock "defunc", which will prevent its re-use by the subsequent mounts, and uses the functionality in FUSE driver. Daniil Lunev (2): fs/super: Add a flag to mark super block defunc FUSE: Mark super block defunc on force unmount fs/fuse/inode.c | 11 +++++++++-- fs/super.c | 4 ++-- include/linux/fs.h | 1 + 3 files changed, 12 insertions(+), 4 deletions(-) -- 2.31.0
