[v2] Prevent re-use of FUSE superblock after force unmount

[PATCH v2 0/2] Prevent re-use of FUSE superblock after force unmount

Daniil Lunev posted 2 patches 3 years, 12 months ago

Diff against v1 v3 v4
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fs/fuse/inode.c    |  7 +++++--
fs/super.c         | 51 ++++++++++++++++++++++++++++++++++++----------
include/linux/fs.h |  1 +
3 files changed, 46 insertions(+), 13 deletions(-)

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[PATCH v2 0/2] Prevent re-use of FUSE superblock after force unmount

Posted by Daniil Lunev 3 years, 12 months ago

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.

Changes in v2:
- Remove super from list of superblocks instead of using a flag

Daniil Lunev (2):
  fs/super: function to prevent super re-use
  FUSE: Retire superblock on force unmount

 fs/fuse/inode.c    |  7 +++++--
 fs/super.c         | 51 ++++++++++++++++++++++++++++++++++++----------
 include/linux/fs.h |  1 +
 3 files changed, 46 insertions(+), 13 deletions(-)

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2.31.0