2019-06-01 16:08:55 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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2017-01-11 11:08:53 +08:00
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/*
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* Copyright (C) 2004 IBM Corporation
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Copyright (C) 2013 Obsidian Research Corp
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* Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
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*
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* Device file system interface to the TPM
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*/
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2018-09-11 01:18:33 +08:00
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#include <linux/poll.h>
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2017-01-11 11:08:53 +08:00
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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2018-09-11 01:18:33 +08:00
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#include <linux/workqueue.h>
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2017-01-11 11:08:53 +08:00
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#include "tpm.h"
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#include "tpm-dev.h"
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2018-09-11 01:18:33 +08:00
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static struct workqueue_struct *tpm_dev_wq;
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static DEFINE_MUTEX(tpm_dev_wq_lock);
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2018-11-03 10:46:50 +08:00
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static ssize_t tpm_dev_transmit(struct tpm_chip *chip, struct tpm_space *space,
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u8 *buf, size_t bufsiz)
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{
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2018-11-03 11:22:36 +08:00
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struct tpm_header *header = (void *)buf;
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ssize_t ret, len;
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2018-11-03 10:46:50 +08:00
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2018-11-03 11:22:36 +08:00
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ret = tpm2_prepare_space(chip, space, buf, bufsiz);
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/* If the command is not implemented by the TPM, synthesize a
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* response with a TPM2_RC_COMMAND_CODE return for user-space.
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*/
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if (ret == -EOPNOTSUPP) {
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header->length = cpu_to_be32(sizeof(*header));
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header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS);
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header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE |
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TSS2_RESMGR_TPM_RC_LAYER);
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ret = sizeof(*header);
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}
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if (ret)
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2018-11-05 02:01:42 +08:00
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goto out_rc;
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2018-11-03 11:22:36 +08:00
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2018-11-05 09:02:38 +08:00
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len = tpm_transmit(chip, buf, bufsiz);
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2018-11-03 11:22:36 +08:00
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if (len < 0)
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ret = len;
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if (!ret)
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ret = tpm2_commit_space(chip, space, buf, &len);
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2018-11-05 02:01:42 +08:00
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out_rc:
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2018-11-03 11:22:36 +08:00
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return ret ? ret : len;
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2018-11-03 10:46:50 +08:00
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}
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static void tpm_dev_async_work(struct work_struct *work)
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2018-09-11 01:18:33 +08:00
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{
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struct file_priv *priv =
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container_of(work, struct file_priv, async_work);
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ssize_t ret;
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mutex_lock(&priv->buffer_mutex);
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priv->command_enqueued = false;
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2019-12-13 01:48:47 +08:00
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ret = tpm_try_get_ops(priv->chip);
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if (ret) {
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priv->response_length = ret;
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goto out;
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}
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2018-11-03 10:46:50 +08:00
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ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer,
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sizeof(priv->data_buffer));
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2018-09-11 01:18:33 +08:00
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tpm_put_ops(priv->chip);
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if (ret > 0) {
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2018-11-21 22:50:37 +08:00
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priv->response_length = ret;
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2018-09-11 01:18:33 +08:00
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mod_timer(&priv->user_read_timer, jiffies + (120 * HZ));
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}
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2019-12-13 01:48:47 +08:00
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out:
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2018-09-11 01:18:33 +08:00
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mutex_unlock(&priv->buffer_mutex);
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wake_up_interruptible(&priv->async_wait);
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}
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treewide: setup_timer() -> timer_setup()
This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.
Casting from unsigned long:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
setup_timer(&ptr->my_timer, my_callback, ptr);
and forced object casts:
void my_callback(struct something *ptr)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);
become:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
Direct function assignments:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
ptr->my_timer.function = my_callback;
have a temporary cast added, along with converting the args:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;
And finally, callbacks without a data assignment:
void my_callback(unsigned long data)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, 0);
have their argument renamed to verify they're unused during conversion:
void my_callback(struct timer_list *unused)
{
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
The conversion is done with the following Coccinelle script:
spatch --very-quiet --all-includes --include-headers \
-I ./arch/x86/include -I ./arch/x86/include/generated \
-I ./include -I ./arch/x86/include/uapi \
-I ./arch/x86/include/generated/uapi -I ./include/uapi \
-I ./include/generated/uapi --include ./include/linux/kconfig.h \
--dir . \
--cocci-file ~/src/data/timer_setup.cocci
@fix_address_of@
expression e;
@@
setup_timer(
-&(e)
+&e
, ...)
// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@
(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
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-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
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-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
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-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)
@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@
(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
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-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
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-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
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_E->_timer@_stl.function = _callback;
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_E->_timer@_stl.function = &_callback;
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_E->_timer@_stl.function = (_cast_func)_callback;
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_E->_timer@_stl.function = (_cast_func)&_callback;
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_E._timer@_stl.function = _callback;
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_E._timer@_stl.function = &_callback;
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_E._timer@_stl.function = (_cast_func)_callback;
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_E._timer@_stl.function = (_cast_func)&_callback;
)
// callback(unsigned long arg)
@change_callback_handle_cast
depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
(
... when != _origarg
_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
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... when != _origarg
_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
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... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
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... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
)
}
// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
depends on change_timer_function_usage &&
!change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
+ _handletype *_origarg = from_timer(_origarg, t, _timer);
+
... when != _origarg
- (_handletype *)_origarg
+ _origarg
... when != _origarg
}
// Avoid already converted callbacks.
@match_callback_converted
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@
void _callback(struct timer_list *t)
{ ... }
// callback(struct something *handle)
@change_callback_handle_arg
depends on change_timer_function_usage &&
!match_callback_converted &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@
void _callback(
-_handletype *_handle
+struct timer_list *t
)
{
+ _handletype *_handle = from_timer(_handle, t, _timer);
...
}
// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
depends on change_timer_function_usage &&
change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@
void _callback(struct timer_list *t)
{
- _handletype *_handle = from_timer(_handle, t, _timer);
}
// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg &&
!change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@
(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)
// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@
(
_E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
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_E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
;
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_E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
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_E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
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_E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
;
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_E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
;
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_E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
)
// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@
_callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
)
// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@
(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)
@change_callback_unused_data
depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@
void _callback(
-_origtype _origarg
+struct timer_list *unused
)
{
... when != _origarg
}
Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
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static void user_reader_timeout(struct timer_list *t)
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2017-01-11 11:08:53 +08:00
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{
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treewide: setup_timer() -> timer_setup()
This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.
Casting from unsigned long:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
setup_timer(&ptr->my_timer, my_callback, ptr);
and forced object casts:
void my_callback(struct something *ptr)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);
become:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
Direct function assignments:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
ptr->my_timer.function = my_callback;
have a temporary cast added, along with converting the args:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;
And finally, callbacks without a data assignment:
void my_callback(unsigned long data)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, 0);
have their argument renamed to verify they're unused during conversion:
void my_callback(struct timer_list *unused)
{
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
The conversion is done with the following Coccinelle script:
spatch --very-quiet --all-includes --include-headers \
-I ./arch/x86/include -I ./arch/x86/include/generated \
-I ./include -I ./arch/x86/include/uapi \
-I ./arch/x86/include/generated/uapi -I ./include/uapi \
-I ./include/generated/uapi --include ./include/linux/kconfig.h \
--dir . \
--cocci-file ~/src/data/timer_setup.cocci
@fix_address_of@
expression e;
@@
setup_timer(
-&(e)
+&e
, ...)
// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@
(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)
@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@
(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
_E->_timer@_stl.function = _callback;
|
_E->_timer@_stl.function = &_callback;
|
_E->_timer@_stl.function = (_cast_func)_callback;
|
_E->_timer@_stl.function = (_cast_func)&_callback;
|
_E._timer@_stl.function = _callback;
|
_E._timer@_stl.function = &_callback;
|
_E._timer@_stl.function = (_cast_func)_callback;
|
_E._timer@_stl.function = (_cast_func)&_callback;
)
// callback(unsigned long arg)
@change_callback_handle_cast
depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
(
... when != _origarg
_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
)
}
// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
depends on change_timer_function_usage &&
!change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
+ _handletype *_origarg = from_timer(_origarg, t, _timer);
+
... when != _origarg
- (_handletype *)_origarg
+ _origarg
... when != _origarg
}
// Avoid already converted callbacks.
@match_callback_converted
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@
void _callback(struct timer_list *t)
{ ... }
// callback(struct something *handle)
@change_callback_handle_arg
depends on change_timer_function_usage &&
!match_callback_converted &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@
void _callback(
-_handletype *_handle
+struct timer_list *t
)
{
+ _handletype *_handle = from_timer(_handle, t, _timer);
...
}
// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
depends on change_timer_function_usage &&
change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@
void _callback(struct timer_list *t)
{
- _handletype *_handle = from_timer(_handle, t, _timer);
}
// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg &&
!change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@
(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)
// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@
(
_E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
)
// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@
_callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
)
// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@
(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)
@change_callback_unused_data
depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@
void _callback(
-_origtype _origarg
+struct timer_list *unused
)
{
... when != _origarg
}
Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
|
|
|
struct file_priv *priv = from_timer(priv, t, user_read_timer);
|
2017-01-11 11:08:53 +08:00
|
|
|
|
|
|
|
pr_warn("TPM user space timeout is deprecated (pid=%d)\n",
|
|
|
|
task_tgid_nr(current));
|
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
schedule_work(&priv->timeout_work);
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
static void tpm_timeout_work(struct work_struct *work)
|
2017-01-11 11:08:53 +08:00
|
|
|
{
|
2018-09-11 01:18:33 +08:00
|
|
|
struct file_priv *priv = container_of(work, struct file_priv,
|
|
|
|
timeout_work);
|
2017-01-11 11:08:53 +08:00
|
|
|
|
|
|
|
mutex_lock(&priv->buffer_mutex);
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_read = true;
|
|
|
|
priv->response_length = 0;
|
2017-01-11 11:08:53 +08:00
|
|
|
memset(priv->data_buffer, 0, sizeof(priv->data_buffer));
|
|
|
|
mutex_unlock(&priv->buffer_mutex);
|
2018-09-11 01:18:33 +08:00
|
|
|
wake_up_interruptible(&priv->async_wait);
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
void tpm_common_open(struct file *file, struct tpm_chip *chip,
|
2018-09-11 01:18:28 +08:00
|
|
|
struct file_priv *priv, struct tpm_space *space)
|
2017-01-11 11:08:53 +08:00
|
|
|
{
|
|
|
|
priv->chip = chip;
|
2018-09-11 01:18:28 +08:00
|
|
|
priv->space = space;
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_read = true;
|
2018-09-11 01:18:28 +08:00
|
|
|
|
2017-01-11 11:08:53 +08:00
|
|
|
mutex_init(&priv->buffer_mutex);
|
treewide: setup_timer() -> timer_setup()
This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.
Casting from unsigned long:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
setup_timer(&ptr->my_timer, my_callback, ptr);
and forced object casts:
void my_callback(struct something *ptr)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);
become:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
Direct function assignments:
void my_callback(unsigned long data)
{
struct something *ptr = (struct something *)data;
...
}
...
ptr->my_timer.function = my_callback;
have a temporary cast added, along with converting the args:
void my_callback(struct timer_list *t)
{
struct something *ptr = from_timer(ptr, t, my_timer);
...
}
...
ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;
And finally, callbacks without a data assignment:
void my_callback(unsigned long data)
{
...
}
...
setup_timer(&ptr->my_timer, my_callback, 0);
have their argument renamed to verify they're unused during conversion:
void my_callback(struct timer_list *unused)
{
...
}
...
timer_setup(&ptr->my_timer, my_callback, 0);
The conversion is done with the following Coccinelle script:
spatch --very-quiet --all-includes --include-headers \
-I ./arch/x86/include -I ./arch/x86/include/generated \
-I ./include -I ./arch/x86/include/uapi \
-I ./arch/x86/include/generated/uapi -I ./include/uapi \
-I ./include/generated/uapi --include ./include/linux/kconfig.h \
--dir . \
--cocci-file ~/src/data/timer_setup.cocci
@fix_address_of@
expression e;
@@
setup_timer(
-&(e)
+&e
, ...)
// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@
(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)
@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@
(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
_E->_timer@_stl.function = _callback;
|
_E->_timer@_stl.function = &_callback;
|
_E->_timer@_stl.function = (_cast_func)_callback;
|
_E->_timer@_stl.function = (_cast_func)&_callback;
|
_E._timer@_stl.function = _callback;
|
_E._timer@_stl.function = &_callback;
|
_E._timer@_stl.function = (_cast_func)_callback;
|
_E._timer@_stl.function = (_cast_func)&_callback;
)
// callback(unsigned long arg)
@change_callback_handle_cast
depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
(
... when != _origarg
_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
|
... when != _origarg
_handletype *_handle;
... when != _handle
_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
... when != _origarg
)
}
// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
depends on change_timer_function_usage &&
!change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@
void _callback(
-_origtype _origarg
+struct timer_list *t
)
{
+ _handletype *_origarg = from_timer(_origarg, t, _timer);
+
... when != _origarg
- (_handletype *)_origarg
+ _origarg
... when != _origarg
}
// Avoid already converted callbacks.
@match_callback_converted
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@
void _callback(struct timer_list *t)
{ ... }
// callback(struct something *handle)
@change_callback_handle_arg
depends on change_timer_function_usage &&
!match_callback_converted &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@
void _callback(
-_handletype *_handle
+struct timer_list *t
)
{
+ _handletype *_handle = from_timer(_handle, t, _timer);
...
}
// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
depends on change_timer_function_usage &&
change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@
void _callback(struct timer_list *t)
{
- _handletype *_handle = from_timer(_handle, t, _timer);
}
// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
depends on change_timer_function_usage &&
!change_callback_handle_cast &&
!change_callback_handle_cast_no_arg &&
!change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@
(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)
// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@
(
_E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
;
|
_E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
;
|
_E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
;
)
// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
depends on change_timer_function_usage &&
(change_callback_handle_cast ||
change_callback_handle_cast_no_arg ||
change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@
_callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
)
// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@
(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)
@change_callback_unused_data
depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@
void _callback(
-_origtype _origarg
+struct timer_list *unused
)
{
... when != _origarg
}
Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
|
|
|
timer_setup(&priv->user_read_timer, user_reader_timeout, 0);
|
2018-09-11 01:18:33 +08:00
|
|
|
INIT_WORK(&priv->timeout_work, tpm_timeout_work);
|
2018-11-03 10:46:50 +08:00
|
|
|
INIT_WORK(&priv->async_work, tpm_dev_async_work);
|
2018-09-11 01:18:33 +08:00
|
|
|
init_waitqueue_head(&priv->async_wait);
|
2017-01-11 11:08:53 +08:00
|
|
|
file->private_data = priv;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t tpm_common_read(struct file *file, char __user *buf,
|
|
|
|
size_t size, loff_t *off)
|
|
|
|
{
|
|
|
|
struct file_priv *priv = file->private_data;
|
2018-05-23 05:37:18 +08:00
|
|
|
ssize_t ret_size = 0;
|
2017-01-11 11:08:53 +08:00
|
|
|
int rc;
|
|
|
|
|
2018-05-23 05:37:18 +08:00
|
|
|
mutex_lock(&priv->buffer_mutex);
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2018-11-21 22:50:37 +08:00
|
|
|
if (priv->response_length) {
|
|
|
|
priv->response_read = true;
|
|
|
|
|
|
|
|
ret_size = min_t(ssize_t, size, priv->response_length);
|
2020-01-08 06:04:48 +08:00
|
|
|
if (ret_size <= 0) {
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_length = 0;
|
|
|
|
goto out;
|
2018-09-11 01:18:33 +08:00
|
|
|
}
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2018-11-21 22:50:37 +08:00
|
|
|
rc = copy_to_user(buf, priv->data_buffer + *off, ret_size);
|
|
|
|
if (rc) {
|
|
|
|
memset(priv->data_buffer, 0, TPM_BUFSIZE);
|
|
|
|
priv->response_length = 0;
|
|
|
|
ret_size = -EFAULT;
|
|
|
|
} else {
|
|
|
|
memset(priv->data_buffer + *off, 0, ret_size);
|
|
|
|
priv->response_length -= ret_size;
|
|
|
|
*off += ret_size;
|
|
|
|
}
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
2018-11-21 22:50:37 +08:00
|
|
|
out:
|
|
|
|
if (!priv->response_length) {
|
|
|
|
*off = 0;
|
|
|
|
del_singleshot_timer_sync(&priv->user_read_timer);
|
|
|
|
flush_work(&priv->timeout_work);
|
|
|
|
}
|
2018-05-23 05:37:18 +08:00
|
|
|
mutex_unlock(&priv->buffer_mutex);
|
2017-01-11 11:08:53 +08:00
|
|
|
return ret_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t tpm_common_write(struct file *file, const char __user *buf,
|
2018-09-11 01:18:28 +08:00
|
|
|
size_t size, loff_t *off)
|
2017-01-11 11:08:53 +08:00
|
|
|
{
|
|
|
|
struct file_priv *priv = file->private_data;
|
2018-09-11 01:18:33 +08:00
|
|
|
int ret = 0;
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
if (size > TPM_BUFSIZE)
|
2018-05-23 05:37:18 +08:00
|
|
|
return -E2BIG;
|
|
|
|
|
|
|
|
mutex_lock(&priv->buffer_mutex);
|
|
|
|
|
2017-01-11 11:08:53 +08:00
|
|
|
/* Cannot perform a write until the read has cleared either via
|
|
|
|
* tpm_read or a user_read_timer timeout. This also prevents split
|
|
|
|
* buffered writes from blocking here.
|
|
|
|
*/
|
2018-11-21 22:50:37 +08:00
|
|
|
if ((!priv->response_read && priv->response_length) ||
|
|
|
|
priv->command_enqueued) {
|
2018-09-11 01:18:33 +08:00
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
2018-05-23 05:37:18 +08:00
|
|
|
}
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
if (copy_from_user(priv->data_buffer, buf, size)) {
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto out;
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
if (size < 6 ||
|
|
|
|
size < be32_to_cpu(*((__be32 *)(priv->data_buffer + 2)))) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
2017-09-08 23:21:32 +08:00
|
|
|
}
|
|
|
|
|
2017-01-11 11:08:53 +08:00
|
|
|
/* atomic tpm command send and result receive. We only hold the ops
|
|
|
|
* lock during this period so that the tpm can be unregistered even if
|
|
|
|
* the char dev is held open.
|
|
|
|
*/
|
|
|
|
if (tpm_try_get_ops(priv->chip)) {
|
2018-09-11 01:18:33 +08:00
|
|
|
ret = -EPIPE;
|
|
|
|
goto out;
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_length = 0;
|
|
|
|
priv->response_read = false;
|
|
|
|
*off = 0;
|
|
|
|
|
2018-09-11 01:18:33 +08:00
|
|
|
/*
|
|
|
|
* If in nonblocking mode schedule an async job to send
|
|
|
|
* the command return the size.
|
|
|
|
* In case of error the err code will be returned in
|
|
|
|
* the subsequent read call.
|
|
|
|
*/
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
|
|
priv->command_enqueued = true;
|
|
|
|
queue_work(tpm_dev_wq, &priv->async_work);
|
2019-12-13 01:48:47 +08:00
|
|
|
tpm_put_ops(priv->chip);
|
2017-01-11 11:08:53 +08:00
|
|
|
mutex_unlock(&priv->buffer_mutex);
|
2018-09-11 01:18:33 +08:00
|
|
|
return size;
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
2018-11-03 10:46:50 +08:00
|
|
|
ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer,
|
|
|
|
sizeof(priv->data_buffer));
|
2018-09-11 01:18:33 +08:00
|
|
|
tpm_put_ops(priv->chip);
|
|
|
|
|
|
|
|
if (ret > 0) {
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_length = ret;
|
2018-09-11 01:18:33 +08:00
|
|
|
mod_timer(&priv->user_read_timer, jiffies + (120 * HZ));
|
|
|
|
ret = size;
|
|
|
|
}
|
|
|
|
out:
|
2017-01-11 11:08:53 +08:00
|
|
|
mutex_unlock(&priv->buffer_mutex);
|
2018-09-11 01:18:33 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
__poll_t tpm_common_poll(struct file *file, poll_table *wait)
|
|
|
|
{
|
|
|
|
struct file_priv *priv = file->private_data;
|
|
|
|
__poll_t mask = 0;
|
|
|
|
|
|
|
|
poll_wait(file, &priv->async_wait, wait);
|
2019-03-28 02:32:38 +08:00
|
|
|
mutex_lock(&priv->buffer_mutex);
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2019-03-28 02:32:38 +08:00
|
|
|
/*
|
|
|
|
* The response_length indicates if there is still response
|
|
|
|
* (or part of it) to be consumed. Partial reads decrease it
|
|
|
|
* by the number of bytes read, and write resets it the zero.
|
|
|
|
*/
|
|
|
|
if (priv->response_length)
|
2018-09-11 01:18:33 +08:00
|
|
|
mask = EPOLLIN | EPOLLRDNORM;
|
|
|
|
else
|
|
|
|
mask = EPOLLOUT | EPOLLWRNORM;
|
2017-01-11 11:08:53 +08:00
|
|
|
|
2019-03-28 02:32:38 +08:00
|
|
|
mutex_unlock(&priv->buffer_mutex);
|
2018-09-11 01:18:33 +08:00
|
|
|
return mask;
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Called on file close
|
|
|
|
*/
|
|
|
|
void tpm_common_release(struct file *file, struct file_priv *priv)
|
|
|
|
{
|
2018-09-11 01:18:33 +08:00
|
|
|
flush_work(&priv->async_work);
|
2017-01-11 11:08:53 +08:00
|
|
|
del_singleshot_timer_sync(&priv->user_read_timer);
|
2018-09-11 01:18:33 +08:00
|
|
|
flush_work(&priv->timeout_work);
|
2017-01-11 11:08:53 +08:00
|
|
|
file->private_data = NULL;
|
2018-11-21 22:50:37 +08:00
|
|
|
priv->response_length = 0;
|
2017-01-11 11:08:53 +08:00
|
|
|
}
|
2018-09-11 01:18:33 +08:00
|
|
|
|
|
|
|
int __init tpm_dev_common_init(void)
|
|
|
|
{
|
|
|
|
tpm_dev_wq = alloc_workqueue("tpm_dev_wq", WQ_MEM_RECLAIM, 0);
|
|
|
|
|
|
|
|
return !tpm_dev_wq ? -ENOMEM : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __exit tpm_dev_common_exit(void)
|
|
|
|
{
|
|
|
|
if (tpm_dev_wq) {
|
|
|
|
destroy_workqueue(tpm_dev_wq);
|
|
|
|
tpm_dev_wq = NULL;
|
|
|
|
}
|
|
|
|
}
|