mirror of
https://github.com/Qortal/Brooklyn.git
synced 2025-02-12 10:15:54 +00:00
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
**************************************************************************/
|
|
/*
|
|
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
|
|
*/
|
|
|
|
#ifndef _TTM_EXECBUF_UTIL_H_
|
|
#define _TTM_EXECBUF_UTIL_H_
|
|
|
|
#include <ttm/ttm_bo_api.h>
|
|
#include <linux/list.h>
|
|
|
|
/**
|
|
* struct ttm_validate_buffer
|
|
*
|
|
* @head: list head for thread-private list.
|
|
* @bo: refcounted buffer object pointer.
|
|
* @shared: should the fence be added shared?
|
|
*/
|
|
|
|
struct ttm_validate_buffer {
|
|
struct list_head head;
|
|
struct ttm_buffer_object *bo;
|
|
bool shared;
|
|
};
|
|
|
|
/**
|
|
* function ttm_eu_backoff_reservation
|
|
*
|
|
* @ticket: ww_acquire_ctx from reserve call
|
|
* @list: thread private list of ttm_validate_buffer structs.
|
|
*
|
|
* Undoes all buffer validation reservations for bos pointed to by
|
|
* the list entries.
|
|
*/
|
|
|
|
extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
|
|
struct list_head *list);
|
|
|
|
/**
|
|
* function ttm_eu_reserve_buffers
|
|
*
|
|
* @ticket: [out] ww_acquire_ctx filled in by call, or NULL if only
|
|
* non-blocking reserves should be tried.
|
|
* @list: thread private list of ttm_validate_buffer structs.
|
|
* @intr: should the wait be interruptible
|
|
* @dups: [out] optional list of duplicates.
|
|
*
|
|
* Tries to reserve bos pointed to by the list entries for validation.
|
|
* If the function returns 0, all buffers are marked as "unfenced",
|
|
* taken off the lru lists and are not synced for write CPU usage.
|
|
*
|
|
* If the function detects a deadlock due to multiple threads trying to
|
|
* reserve the same buffers in reverse order, all threads except one will
|
|
* back off and retry. This function may sleep while waiting for
|
|
* CPU write reservations to be cleared, and for other threads to
|
|
* unreserve their buffers.
|
|
*
|
|
* If intr is set to true, this function may return -ERESTARTSYS if the
|
|
* calling process receives a signal while waiting. In that case, no
|
|
* buffers on the list will be reserved upon return.
|
|
*
|
|
* If dups is non NULL all buffers already reserved by the current thread
|
|
* (e.g. duplicates) are added to this list, otherwise -EALREADY is returned
|
|
* on the first already reserved buffer and all buffers from the list are
|
|
* unreserved again.
|
|
*
|
|
* Buffers reserved by this function should be unreserved by
|
|
* a call to either ttm_eu_backoff_reservation() or
|
|
* ttm_eu_fence_buffer_objects() when command submission is complete or
|
|
* has failed.
|
|
*/
|
|
|
|
extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
|
|
struct list_head *list, bool intr,
|
|
struct list_head *dups);
|
|
|
|
/**
|
|
* function ttm_eu_fence_buffer_objects.
|
|
*
|
|
* @ticket: ww_acquire_ctx from reserve call
|
|
* @list: thread private list of ttm_validate_buffer structs.
|
|
* @fence: The new exclusive fence for the buffers.
|
|
*
|
|
* This function should be called when command submission is complete, and
|
|
* it will add a new sync object to bos pointed to by entries on @list.
|
|
* It also unreserves all buffers, putting them on lru lists.
|
|
*
|
|
*/
|
|
|
|
extern void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
|
|
struct list_head *list,
|
|
struct fence *fence);
|
|
|
|
#endif
|