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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3a4030761e
After commitfc72d1d54d("tuntap: XDP transmission"), we can actually queueing XDP pointers in the pointer ring, so we should examine the pointer type before freeing the pointer. Fixes:fc72d1d54d("tuntap: XDP transmission") Reported-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* Universal TUN/TAP device driver.
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* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
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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 the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __IF_TUN_H
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#define __IF_TUN_H
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#include <uapi/linux/if_tun.h>
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#define TUN_XDP_FLAG 0x1UL
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#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
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struct socket *tun_get_socket(struct file *);
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struct ptr_ring *tun_get_tx_ring(struct file *file);
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bool tun_is_xdp_buff(void *ptr);
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void *tun_xdp_to_ptr(void *ptr);
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void *tun_ptr_to_xdp(void *ptr);
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void tun_ptr_free(void *ptr);
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#else
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#include <linux/err.h>
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#include <linux/errno.h>
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struct file;
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struct socket;
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static inline struct socket *tun_get_socket(struct file *f)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline bool tun_is_xdp_buff(void *ptr)
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{
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return false;
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}
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static inline void *tun_xdp_to_ptr(void *ptr)
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{
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return NULL;
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}
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static inline void *tun_ptr_to_xdp(void *ptr)
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{
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return NULL;
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}
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static inline void tun_ptr_free(void *ptr)
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{
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}
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#endif /* CONFIG_TUN */
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#endif /* __IF_TUN_H */
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