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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657/* SPDX-License-Identifier: GPL-2.0 *//* Copyright (C) B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner */
#ifndef _NET_BATMAN_ADV_BITARRAY_H_#define _NET_BATMAN_ADV_BITARRAY_H_
#include "main.h"
#include <linux/bitops.h>#include <linux/compiler.h>#include <linux/stddef.h>#include <linux/types.h>
/** * batadv_test_bit() - check if bit is set in the current window * * @seq_bits: pointer to the sequence number bitmap of received packets * @last_seqno: latest sequence number in seq_bits * @curr_seqno: sequence number to test for * * Return: true if the corresponding bit in the given seq_bits indicates true * and curr_seqno is within range of last_seqno. Otherwise returns false. */static inline bool batadv_test_bit(const unsigned long *seq_bits, u32 last_seqno, u32 curr_seqno){ s32 diff;
diff = last_seqno - curr_seqno; if (diff < 0 || diff >= BATADV_TQ_LOCAL_WINDOW_SIZE) return false; return test_bit(diff, seq_bits) != 0;}
/** * batadv_set_bit() - Turn corresponding bit on, so we can remember that we got * the packet * @seq_bits: bitmap of the packet receive window * @n: relative sequence number of newly received packet */static inline void batadv_set_bit(unsigned long *seq_bits, s32 n){ /* if too old, just drop it */ if (n < 0 || n >= BATADV_TQ_LOCAL_WINDOW_SIZE) return;
set_bit(n, seq_bits); /* turn the position on */}
bool batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff, int set_mark);
#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */