0e7d31f63b
IO queue related attributes are registered statically at driver attach with the rest of the ENA specific sysctl nodes. However, the number of queues can be changed at runtime via the `ena_sysctl_io_queues_nb` request, leading to a potential exposure of attributes for non-existing queues. Introduce a new `ena_sysctl_update_queue_node_nb` function, which updates the sysctl nodes after the number of queues is altered. This happens by either registering or unregistering node specific oids, based on a delta between the previous and current queue count. NOTE: All unregistered oids must be registered again before the driver detach, e.g. by another call to this function. Submitted by: Artur Rojek <ar@semihalf.com> Obtained from: Semihalf MFC after: 2 weeks Sponsored by: Amazon, Inc.
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2015-2021 Amazon.com, Inc. or its affiliates.
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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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* 1. 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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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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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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* $FreeBSD$
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*
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*/
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#ifndef ENA_SYSCTL_H
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#define ENA_SYSCTL_H
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include "ena.h"
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void ena_sysctl_add_nodes(struct ena_adapter *adapter);
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void ena_sysctl_update_queue_node_nb(struct ena_adapter *adapter, int old,
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int new);
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extern int ena_enable_9k_mbufs;
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#define ena_mbuf_sz (ena_enable_9k_mbufs ? MJUM9BYTES : MJUMPAGESIZE)
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/* Force the driver to use large LLQ (Low Latency Queue) headers. */
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extern bool ena_force_large_llq_header;
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#endif /* !(ENA_SYSCTL_H) */
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