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`vsock_do_ioctl` returns -ENOIOCTLCMD if an ioctl support is not implemented, like for SIOCINQ before commitf7c7226592("vsock: Add support for SIOCINQ ioctl"). In net/socket.c, -ENOIOCTLCMD is re-mapped to -ENOTTY for the user space. So, our test suite, without that commit applied, is failing in this way: 34 - SOCK_STREAM ioctl(SIOCINQ) functionality...ioctl(21531): Inappropriate ioctl for device Return false in vsock_ioctl_int() to skip the test in this case as well, instead of failing. Fixes:53548d6bff("test/vsock: Add retry mechanism to ioctl wrapper") Cc: niuxuewei.nxw@antgroup.com Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Xuewei Niu <niuxuewei.nxw@antgroup.com> Link: https://patch.msgid.link/20250715093233.94108-1-sgarzare@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>