Based on our discussion, I put together two simple patches. The first adds an optional extra parameter to FUSE_LOOKUP outargs. This allows the daemon to set a backing file at lookup time on a successful lookup. I then looked at which opcodes do not require a file handle. The simplest seem to be FUSE_MKDIR and FUSE_RMDIR. So I implemented passthrough handling for these opcodes in the second patch. Both patches sit on top of Amir's tree at: https://github.com/amir73il/linux/commit/ceaf7f16452f6aaf7993279b1c10e727d6bf6a32 Thoughts? Paul Paul Lawrence (2): fuse: Allow backing file to be set at lookup (WIP) fuse: Add passthrough for mkdir and rmdir (WIP) fs/fuse/dir.c | 31 +++++++++++++--- fs/fuse/fuse_i.h | 14 ++++++- fs/fuse/iomode.c | 41 ++++++++++++++++++-- fs/fuse/passthrough.c | 78 ++++++++++++++++++++++++++++++++++----- include/uapi/linux/fuse.h | 6 +++ 5 files changed, 150 insertions(+), 20 deletions(-) -- 2.50.1.565.gc32cd1483b-goog
