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53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022-2024 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_ag.h"
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#include "xfs_trace.h"
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/* Initialize a notifier chain. */
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void
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xfs_hooks_init(
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struct xfs_hooks *chain)
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{
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BLOCKING_INIT_NOTIFIER_HEAD(&chain->head);
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}
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/* Make it so a function gets called whenever we hit a certain hook point. */
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int
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xfs_hooks_add(
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struct xfs_hooks *chain,
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struct xfs_hook *hook)
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{
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ASSERT(hook->nb.notifier_call != NULL);
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BUILD_BUG_ON(offsetof(struct xfs_hook, nb) != 0);
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return blocking_notifier_chain_register(&chain->head, &hook->nb);
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}
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/* Remove a previously installed hook. */
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void
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xfs_hooks_del(
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struct xfs_hooks *chain,
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struct xfs_hook *hook)
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{
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blocking_notifier_chain_unregister(&chain->head, &hook->nb);
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}
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/* Call a hook. Returns the NOTIFY_* value returned by the last hook. */
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int
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xfs_hooks_call(
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struct xfs_hooks *chain,
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unsigned long val,
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void *priv)
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{
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return blocking_notifier_call_chain(&chain->head, val, priv);
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}
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