8cbc89c7d2
Some argument validation error paths would return without releasing the file reference obtained at the beginning of the function. While here, fix some style bugs and remove trivial debug prints. Reviewed by: kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19214
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*-
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* Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* This software was developed by BAE Systems, the University of Cambridge
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* Computer Laboratory, and Memorial University under DARPA/AFRL contract
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* FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
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* (TC) research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/capsicum.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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#include <machine/sgx.h>
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#include <machine/../linux/linux.h>
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#include <machine/../linux/linux_proto.h>
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#include <compat/linux/linux_ioctl.h>
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#include <amd64/sgx/sgxvar.h>
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#include <sys/ioccom.h>
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#define SGX_LINUX_IOCTL_MIN (SGX_IOC_ENCLAVE_CREATE & 0xffff)
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#define SGX_LINUX_IOCTL_MAX (SGX_IOC_ENCLAVE_INIT & 0xffff)
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static int
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sgx_linux_ioctl(struct thread *td, struct linux_ioctl_args *args)
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{
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uint8_t data[SGX_IOCTL_MAX_DATA_LEN];
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cap_rights_t rights;
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struct file *fp;
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u_long cmd;
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int error;
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int len;
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error = fget(td, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
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if (error != 0)
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return (error);
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cmd = args->cmd;
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args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
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if ((cmd & LINUX_IOC_IN) != 0)
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args->cmd |= IOC_IN;
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if ((cmd & LINUX_IOC_OUT) != 0)
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args->cmd |= IOC_OUT;
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len = IOCPARM_LEN(cmd);
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if (len > SGX_IOCTL_MAX_DATA_LEN) {
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error = EINVAL;
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goto out;
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}
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if ((cmd & LINUX_IOC_IN) != 0) {
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error = copyin((void *)args->arg, data, len);
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if (error != 0)
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goto out;
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}
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error = fo_ioctl(fp, args->cmd, (caddr_t)data, td->td_ucred, td);
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out:
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fdrop(fp, td);
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return (error);
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}
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static struct linux_ioctl_handler sgx_linux_handler = {
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sgx_linux_ioctl,
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SGX_LINUX_IOCTL_MIN,
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SGX_LINUX_IOCTL_MAX,
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};
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SYSINIT(sgx_linux_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
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linux_ioctl_register_handler, &sgx_linux_handler);
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SYSUNINIT(sgx_linux_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
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linux_ioctl_unregister_handler, &sgx_linux_handler);
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static int
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sgx_linux_modevent(module_t mod, int type, void *data)
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{
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return (0);
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}
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DEV_MODULE(sgx_linux, sgx_linux_modevent, NULL);
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MODULE_DEPEND(sgx_linux, linux64, 1, 1, 1);
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