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Commit b0c7cb26 authored by Laura Abbott's avatar Laura Abbott Committed by Greg Kroah-Hartman
Browse files

staging: android: ion: Break the ABI in the name of forward progress 



Several of the Ion ioctls were designed in such a way that they
necessitate compat ioctls. We're breaking a bunch of other ABIs and
cleaning stuff up anyway so let's follow the ioctl guidelines and clean
things up while everyone is busy converting things over anyway. As part
of this, also remove the useless alignment field from the allocation
structure.

Signed-off-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 62b3a094

drivers/staging/android/ion/Makefile

+0 −3
Original line number Diff line number Diff line
@@ -2,6 +2,3 @@ obj-$(CONFIG_ION) += ion.o ion-ioctl.o ion_heap.o \ 
			ion_page_pool.o ion_system_heap.o \

			ion_carveout_heap.o ion_chunk_heap.o

obj-$(CONFIG_ION_CMA_HEAP) += ion_cma_heap.o
 
ifdef CONFIG_COMPAT

obj-$(CONFIG_ION) += compat_ion.o

endif

drivers/staging/android/ion/compat_ion.c

deleted100644 → 0
+0 −152
Original line number Diff line number Diff line 
/*

 * drivers/staging/android/ion/compat_ion.c

 *

 * Copyright (C) 2013 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/compat.h>

#include <linux/fs.h>

#include <linux/uaccess.h>



#include "ion.h"

#include "compat_ion.h"



/* See drivers/staging/android/uapi/ion.h for the definition of these structs */

struct compat_ion_allocation_data {

	compat_size_t len;

	compat_size_t align;

	compat_uint_t heap_id_mask;

	compat_uint_t flags;

	compat_int_t handle;

};



struct compat_ion_handle_data {

	compat_int_t handle;

};



#define COMPAT_ION_IOC_ALLOC	_IOWR(ION_IOC_MAGIC, 0, \

				      struct compat_ion_allocation_data)

#define COMPAT_ION_IOC_FREE	_IOWR(ION_IOC_MAGIC, 1, \

				      struct compat_ion_handle_data)



static int compat_get_ion_allocation_data(

			struct compat_ion_allocation_data __user *data32,

			struct ion_allocation_data __user *data)

{

	compat_size_t s;

	compat_uint_t u;

	compat_int_t i;

	int err;



	err = get_user(s, &data32->len);

	err |= put_user(s, &data->len);

	err |= get_user(s, &data32->align);

	err |= put_user(s, &data->align);

	err |= get_user(u, &data32->heap_id_mask);

	err |= put_user(u, &data->heap_id_mask);

	err |= get_user(u, &data32->flags);

	err |= put_user(u, &data->flags);

	err |= get_user(i, &data32->handle);

	err |= put_user(i, &data->handle);



	return err;

}



static int compat_get_ion_handle_data(

			struct compat_ion_handle_data __user *data32,

			struct ion_handle_data __user *data)

{

	compat_int_t i;

	int err;



	err = get_user(i, &data32->handle);

	err |= put_user(i, &data->handle);



	return err;

}



static int compat_put_ion_allocation_data(

			struct compat_ion_allocation_data __user *data32,

			struct ion_allocation_data __user *data)

{

	compat_size_t s;

	compat_uint_t u;

	compat_int_t i;

	int err;



	err = get_user(s, &data->len);

	err |= put_user(s, &data32->len);

	err |= get_user(s, &data->align);

	err |= put_user(s, &data32->align);

	err |= get_user(u, &data->heap_id_mask);

	err |= put_user(u, &data32->heap_id_mask);

	err |= get_user(u, &data->flags);

	err |= put_user(u, &data32->flags);

	err |= get_user(i, &data->handle);

	err |= put_user(i, &data32->handle);



	return err;

}



long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	long ret;



	if (!filp->f_op->unlocked_ioctl)

		return -ENOTTY;



	switch (cmd) {

	case COMPAT_ION_IOC_ALLOC:

	{

		struct compat_ion_allocation_data __user *data32;

		struct ion_allocation_data __user *data;

		int err;



		data32 = compat_ptr(arg);

		data = compat_alloc_user_space(sizeof(*data));

		if (!data)

			return -EFAULT;



		err = compat_get_ion_allocation_data(data32, data);

		if (err)

			return err;

		ret = filp->f_op->unlocked_ioctl(filp, ION_IOC_ALLOC,

							(unsigned long)data);

		err = compat_put_ion_allocation_data(data32, data);

		return ret ? ret : err;

	}

	case COMPAT_ION_IOC_FREE:

	{

		struct compat_ion_handle_data __user *data32;

		struct ion_handle_data __user *data;

		int err;



		data32 = compat_ptr(arg);

		data = compat_alloc_user_space(sizeof(*data));

		if (!data)

			return -EFAULT;



		err = compat_get_ion_handle_data(data32, data);

		if (err)

			return err;



		return filp->f_op->unlocked_ioctl(filp, ION_IOC_FREE,

							(unsigned long)data);

	}

	case ION_IOC_SHARE:

		return filp->f_op->unlocked_ioctl(filp, cmd,

						(unsigned long)compat_ptr(arg));

	default:

		return -ENOIOCTLCMD;

	}

}

drivers/staging/android/ion/compat_ion.h

deleted100644 → 0
+0 −29
Original line number Diff line number Diff line 
/*

 * drivers/staging/android/ion/compat_ion.h

 *

 * Copyright (C) 2013 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.

 *

 */



#ifndef _LINUX_COMPAT_ION_H

#define _LINUX_COMPAT_ION_H



#if IS_ENABLED(CONFIG_COMPAT)



long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);



#else



#define compat_ion_ioctl  NULL



#endif /* CONFIG_COMPAT */

#endif /* _LINUX_COMPAT_ION_H */

drivers/staging/android/ion/ion-ioctl.c

+0 −1
Original line number Diff line number Diff line
@@ -20,7 +20,6 @@ 


#include "ion.h"

#include "ion_priv.h"

#include "compat_ion.h"



union ion_ioctl_arg {

	struct ion_fd_data fd;

drivers/staging/android/ion/ion.c

+3 −2
Original line number Diff line number Diff line
@@ -40,7 +40,6 @@ 


#include "ion.h"

#include "ion_priv.h"

#include "compat_ion.h"



bool ion_buffer_cached(struct ion_buffer *buffer)

{
@@ -1065,7 +1064,9 @@ static const struct file_operations ion_fops = { 
	.open           = ion_open,

	.release        = ion_release,

	.unlocked_ioctl = ion_ioctl,

	.compat_ioctl   = compat_ion_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl	= ion_ioctl,

#endif

};



static size_t ion_debug_heap_total(struct ion_client *client,