On Wed, 27 Aug 2025 at 00:07, Joanne Koong <joannelkoong@xxxxxxxxx> wrote: > Isn't the sync() in fuse right now gated by fc->sync_fs (which is only > set to true for virtiofsd)? I don't see where FUSE_SETATTR or > FUSE_FSYNC get sent in the sync() path to untrusted servers. Hmm, it's through sync_inodes_one_sb() that fuse_write_inode() could get called, which then would trigger a FUSE_SETATTR. Does anyone know how useful sync() is in practice? I guess most applications have switched to syncfs() which is more specific. In any case, I don't remember a complaint about sync(2) ignoring fuse filesystems. Thanks, Miklos
