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head/sys/netinet/tcp_stacks/sack_filter.h
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| #ifndef __sack_filter_h__ | |||||
| #define __sack_filter_h__ | |||||
| /*- | |||||
| * Copyright (c) 2017 | |||||
| * Netflix Inc. | |||||
| * All rights reserved. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions | |||||
| * are met: | |||||
| * 1. Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
| * SUCH DAMAGE. | |||||
| * | |||||
| * __FBSDID("$FreeBSD$"); | |||||
| */ | |||||
| /* | |||||
| * Seven entry's is carefully choosen to | |||||
| * fit in one cache line. We can easily | |||||
| * change this to 15 (but it gets very | |||||
| * little extra filtering). To change it | |||||
| * to be larger than 15 would require either | |||||
| * sf_bits becoming a uint32_t and then you | |||||
| * could go to 31.. or change it to a full | |||||
| * bitstring.. It is really doubtful you | |||||
| * will get much benefit beyond 7, in testing | |||||
| * there was a small amount but very very small. | |||||
| */ | |||||
| #define SACK_FILTER_BLOCKS 7 | |||||
| struct sack_filter { | |||||
| tcp_seq sf_ack; | |||||
| uint16_t sf_bits; | |||||
| uint8_t sf_cur; | |||||
| uint8_t sf_used; | |||||
| struct sackblk sf_blks[SACK_FILTER_BLOCKS]; | |||||
| }; | |||||
| #ifdef _KERNEL | |||||
| void sack_filter_clear(struct sack_filter *sf, tcp_seq seq); | |||||
| int sack_filter_blks(struct sack_filter *sf, struct sackblk *in, int numblks, tcp_seq th_ack); | |||||
| #endif | |||||
| #endif | |||||