Release 4.12 drivers/staging/android/ion/ion-ioctl.c
/*
*
* Copyright (C) 2011 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include "ion.h"
union ion_ioctl_arg {
struct ion_allocation_data allocation;
struct ion_heap_query query;
};
static int validate_ioctl_arg(unsigned int cmd, union ion_ioctl_arg *arg)
{
int ret = 0;
switch (cmd) {
case ION_IOC_HEAP_QUERY:
ret = arg->query.reserved0 != 0;
ret |= arg->query.reserved1 != 0;
ret |= arg->query.reserved2 != 0;
break;
default:
break;
}
return ret ? -EINVAL : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Laura Abbott | 70 | 100.00% | 1 | 100.00% |
| Total | 70 | 100.00% | 1 | 100.00% |
/* fix up the cases where the ioctl direction bits are incorrect */
static unsigned int ion_ioctl_dir(unsigned int cmd)
{
switch (cmd) {
default:
return _IOC_DIR(cmd);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Laura Abbott | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
int ret = 0;
unsigned int dir;
union ion_ioctl_arg data;
dir = ion_ioctl_dir(cmd);
if (_IOC_SIZE(cmd) > sizeof(data))
return -EINVAL;
/*
* The copy_from_user is unconditional here for both read and write
* to do the validate. If there is no write for the ioctl, the
* buffer is cleared
*/
if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))
return -EFAULT;
ret = validate_ioctl_arg(cmd, &data);
if (WARN_ON_ONCE(ret))
return ret;
if (!(dir & _IOC_WRITE))
memset(&data, 0, sizeof(data));
switch (cmd) {
case ION_IOC_ALLOC:
{
int fd;
fd = ion_alloc(data.allocation.len,
data.allocation.heap_id_mask,
data.allocation.flags);
if (fd < 0)
return fd;
data.allocation.fd = fd;
break;
}
case ION_IOC_HEAP_QUERY:
ret = ion_query_heaps(&data.query);
break;
default:
return -ENOTTY;
}
if (dir & _IOC_READ) {
if (copy_to_user((void __user *)arg, &data, _IOC_SIZE(cmd)))
return -EFAULT;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Laura Abbott | 230 | 100.00% | 3 | 100.00% |
| Total | 230 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Laura Abbott | 354 | 100.00% | 3 | 100.00% |
| Total | 354 | 100.00% | 3 | 100.00% |
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