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dd10e0ae0f
Expose the FUSE_PASSTHROUGH interface to user space and declare all the basic data structures and functions as the skeleton on top of which the FUSE passthrough functionality will be built. As part of this, introduce the new FUSE passthrough ioctl, which allows the FUSE daemon to specify a direct connection between a FUSE file and a lower file system file. Such ioctl requires user space to pass the file descriptor of one of its opened files through the fuse_passthrough_out data structure introduced in this patch. This structure includes extra fields for possible future extensions. Also, add the passthrough functions for the set-up and tear-down of the data structures and locks that will be used both when fuse_conns and fuse_files are created/deleted. Bug: 179164095 Link: https://lore.kernel.org/lkml/20210125153057.3623715-4-balsini@android.com/ Signed-off-by: Alessio Balsini <balsini@android.com> Change-Id: I732532581348adadda5b5048a9346c2b0868d539 Signed-off-by: Alessio Balsini <balsini@google.com> (cherry picked from commit d02368d67989781a3484cd8dd71e0079d0d1bda2) Signed-off-by: alk3pInjection <webmaster@raspii.tech> Signed-off-by: azrim <mirzaspc@gmail.com>