[PATCHSET 7/9] fuse2fs: better tracking of writable state

["Darrick J. Wong" <djwong@kernel.org>]

Hi all,

There are multiple mutability variables in play in fuse2fs -- first,
EXT2_FLAG_RW tracks whether or not we can write anything to the
filesystem.  However, there's a second state, which is whether or not
we actually want to write to the filesystem, regardless of the library
state.  This can happen if we open libext2fs for writing, but then
discover something about the filesystem that makes us not want to write
to it after all.

Split out this second variable into an explicit variable in fuse2fs.

If you're going to start using this code, I strongly recommend pulling
from my git trees, which are linked below.

Comments and questions are, as always, welcome.

e2fsprogs git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/e2fsprogs.git/log/?h=fuse2fs-writability
---
Commits in this patchset:
 * fuse2fs: pass a struct fuse2fs to fs_writeable
 * fuse2fs: track our own writable state
 * fuse2fs: enable the shutdown ioctl
---
 misc/fuse2fs.c |  102 ++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 73 insertions(+), 29 deletions(-)