57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Multipath TCP
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*
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* Copyright (c) 2022, SUSE.
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*/
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#define pr_fmt(fmt) "MPTCP: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/list.h>
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#include <linux/rculist.h>
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#include <linux/spinlock.h>
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#include "protocol.h"
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static DEFINE_SPINLOCK(mptcp_sched_list_lock);
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static LIST_HEAD(mptcp_sched_list);
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/* Must be called with rcu read lock held */
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struct mptcp_sched_ops *mptcp_sched_find(const char *name)
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{
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struct mptcp_sched_ops *sched, *ret = NULL;
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list_for_each_entry_rcu(sched, &mptcp_sched_list, list) {
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if (!strcmp(sched->name, name)) {
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ret = sched;
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break;
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}
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}
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return ret;
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}
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int mptcp_register_scheduler(struct mptcp_sched_ops *sched)
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{
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if (!sched->get_subflow)
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return -EINVAL;
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spin_lock(&mptcp_sched_list_lock);
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if (mptcp_sched_find(sched->name)) {
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spin_unlock(&mptcp_sched_list_lock);
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return -EEXIST;
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}
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list_add_tail_rcu(&sched->list, &mptcp_sched_list);
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spin_unlock(&mptcp_sched_list_lock);
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pr_debug("%s registered", sched->name);
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return 0;
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}
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void mptcp_unregister_scheduler(struct mptcp_sched_ops *sched)
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{
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spin_lock(&mptcp_sched_list_lock);
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list_del_rcu(&sched->list);
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spin_unlock(&mptcp_sched_list_lock);
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}
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