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d9c37390c4
Until we synchronize against device removal this limits the damage of use after free bugs to the driver's own objects. Unless we implement reference counting we need to ensure at least a subset of a remote device is valid at all times. We follow the lead of other libsas drivers that also preallocate devices. This also enforces maximum remote device accounting at the lldd layer, but the core may still run out of RNC's before we hit this limit. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
138 lines
4.7 KiB
C
138 lines
4.7 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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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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*
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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if !defined(_ISCI_REMOTE_DEVICE_H_)
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#define _ISCI_REMOTE_DEVICE_H_
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struct isci_host;
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struct scic_sds_remote_device;
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struct isci_remote_device {
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enum isci_status status;
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#define IDEV_START_PENDING 0
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#define IDEV_STOP_PENDING 1
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#define IDEV_ALLOCATED 2
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unsigned long flags;
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struct isci_port *isci_port;
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struct domain_device *domain_dev;
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struct list_head node;
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struct list_head reqs_in_process;
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spinlock_t state_lock;
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};
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static inline struct scic_sds_remote_device *to_sci_dev(struct isci_remote_device *idev)
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{
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/* core data is an opaque buffer at the end of the idev */
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return (struct scic_sds_remote_device *) &idev[1];
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}
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#define to_isci_remote_device(p) \
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container_of(p, struct isci_remote_device, sci_remote_device);
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#define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000
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/**
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* isci_dev_from_domain_dev() - This accessor retrieves the remote_device
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* object reference from the Linux domain_device reference.
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* @domdev,: This parameter points to the Linux domain_device object .
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*
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* A reference to the associated isci remote device.
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*/
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#define isci_dev_from_domain_dev(domdev) \
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((struct isci_remote_device *)(domdev)->lldd_dev)
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void isci_remote_device_start_complete(
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struct isci_host *,
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struct isci_remote_device *,
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enum sci_status);
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void isci_remote_device_stop_complete(
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struct isci_host *,
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struct isci_remote_device *,
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enum sci_status);
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enum sci_status isci_remote_device_stop(struct isci_host *ihost,
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struct isci_remote_device *idev);
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void isci_remote_device_nuke_requests(
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struct isci_remote_device *isci_device);
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void isci_remote_device_ready(
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struct isci_remote_device *);
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void isci_remote_device_not_ready(
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struct isci_remote_device *,
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u32);
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void isci_remote_device_gone(
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struct domain_device *domain_dev);
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int isci_remote_device_found(
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struct domain_device *domain_dev);
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bool isci_device_is_reset_pending(
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struct isci_host *isci_host,
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struct isci_remote_device *isci_device);
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void isci_device_clear_reset_pending(
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struct isci_remote_device *isci_device);
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void isci_remote_device_change_state(
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struct isci_remote_device *isci_device,
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enum isci_status status);
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#endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */
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