Please review this patch series carefully. I am new to kernel development and I am not quite sure if I have followed the best practices, especially in terms of seq_file, error handling and locking. I would appreciate any feedback. I have do some simply testing using libfuse example [1]. It seems to work well. [1]: https://github.com/libfuse/libfuse/blob/master/example/passthrough_hp.cc Signed-off-by: Chen Linxuan <chenlinxuan@xxxxxxxxxxxxx> --- Changes in v3: - Apply some suggestions from Amir Goldstein - Link to v2: https://lore.kernel.org/r/20250508-fusectl-backing-files-v2-0-62f564e76984@xxxxxxxxxxxxx Changes in v2: - Void using seq_file private field as it seems that we can just simply returning fuse_backing_files_seq_state in start() and next() - Apply some suggestions from Amir Goldstein: - Use idr_get_next() for iteration - Do fuse_backing_get/put(fb) around dereferencing fb->file - Update fdinfo of fuse files - Link to v1: https://lore.kernel.org/r/20250507032926.377076-2-chenlinxuan@xxxxxxxxxxxxx --- Chen Linxuan (3): fs: fuse: add const qualifier to fuse_ctl_file_conn_get() fs: fuse: add backing_files control file fs: fuse: add more information to fdinfo fs/fuse/control.c | 157 +++++++++++++++++++++++++++++++++++++++++++++++++----- fs/fuse/file.c | 20 +++++++ fs/fuse/fuse_i.h | 2 +- 3 files changed, 165 insertions(+), 14 deletions(-) --- base-commit: d76bb1ebb5587f66b0f8b8099bfbb44722bc08b3 change-id: 20250508-fusectl-backing-files-6810d290e798 Best regards, -- Chen Linxuan <chenlinxuan@xxxxxxxxxxxxx>
