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Release 4.15 net/netfilter/nft_queue.c

Directory: net/netfilter
/*
 * Copyright (c) 2013 Eric Leblond <eric@regit.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Development of this code partly funded by OISF
 * (http://www.openinfosecfoundation.org/)
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/jhash.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nf_queue.h>


static u32 jhash_initval __read_mostly;


struct nft_queue {
	
enum nft_registers	sreg_qnum:8;
	
u16			queuenum;
	
u16			queues_total;
	
u16			flags;
};


static void nft_queue_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) { struct nft_queue *priv = nft_expr_priv(expr); u32 queue = priv->queuenum; u32 ret; if (priv->queues_total > 1) { if (priv->flags & NFT_QUEUE_FLAG_CPU_FANOUT) { int cpu = raw_smp_processor_id(); queue = priv->queuenum + cpu % priv->queues_total; } else { queue = nfqueue_hash(pkt->skb, queue, priv->queues_total, nft_pf(pkt), jhash_initval); } } ret = NF_QUEUE_NR(queue); if (priv->flags & NFT_QUEUE_FLAG_BYPASS) ret |= NF_VERDICT_FLAG_QUEUE_BYPASS; regs->verdict.code = ret; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Leblond12190.98%120.00%
Patrick McHardy86.02%240.00%
Pablo Neira Ayuso43.01%240.00%
Total133100.00%5100.00%


static void nft_queue_sreg_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) { struct nft_queue *priv = nft_expr_priv(expr); u32 queue, ret; queue = regs->data[priv->sreg_qnum]; ret = NF_QUEUE_NR(queue); if (priv->flags & NFT_QUEUE_FLAG_BYPASS) ret |= NF_VERDICT_FLAG_QUEUE_BYPASS; regs->verdict.code = ret; }

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Liping Zhang76100.00%1100.00%
Total76100.00%1100.00%

static const struct nla_policy nft_queue_policy[NFTA_QUEUE_MAX + 1] = { [NFTA_QUEUE_NUM] = { .type = NLA_U16 }, [NFTA_QUEUE_TOTAL] = { .type = NLA_U16 }, [NFTA_QUEUE_FLAGS] = { .type = NLA_U16 }, [NFTA_QUEUE_SREG_QNUM] = { .type = NLA_U32 }, };
static int nft_queue_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) { struct nft_queue *priv = nft_expr_priv(expr); u32 maxid; priv->queuenum = ntohs(nla_get_be16(tb[NFTA_QUEUE_NUM])); if (tb[NFTA_QUEUE_TOTAL]) priv->queues_total = ntohs(nla_get_be16(tb[NFTA_QUEUE_TOTAL])); else priv->queues_total = 1; if (priv->queues_total == 0) return -EINVAL; maxid = priv->queues_total - 1 + priv->queuenum; if (maxid > U16_MAX) return -ERANGE; if (tb[NFTA_QUEUE_FLAGS]) { priv->flags = ntohs(nla_get_be16(tb[NFTA_QUEUE_FLAGS])); if (priv->flags & ~NFT_QUEUE_FLAG_MASK) return -EINVAL; } return 0; }

Contributors

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Eric Leblond11371.97%150.00%
Liping Zhang4428.03%150.00%
Total157100.00%2100.00%


static int nft_queue_sreg_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) { struct nft_queue *priv = nft_expr_priv(expr); int err; priv->sreg_qnum = nft_parse_register(tb[NFTA_QUEUE_SREG_QNUM]); err = nft_validate_register_load(priv->sreg_qnum, sizeof(u32)); if (err < 0) return err; if (tb[NFTA_QUEUE_FLAGS]) { priv->flags = ntohs(nla_get_be16(tb[NFTA_QUEUE_FLAGS])); if (priv->flags & ~NFT_QUEUE_FLAG_MASK) return -EINVAL; if (priv->flags & NFT_QUEUE_FLAG_CPU_FANOUT) return -EOPNOTSUPP; } return 0; }

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Liping Zhang126100.00%1100.00%
Total126100.00%1100.00%


static int nft_queue_dump(struct sk_buff *skb, const struct nft_expr *expr) { const struct nft_queue *priv = nft_expr_priv(expr); if (nla_put_be16(skb, NFTA_QUEUE_NUM, htons(priv->queuenum)) || nla_put_be16(skb, NFTA_QUEUE_TOTAL, htons(priv->queues_total)) || nla_put_be16(skb, NFTA_QUEUE_FLAGS, htons(priv->flags))) goto nla_put_failure; return 0; nla_put_failure: return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Leblond84100.00%1100.00%
Total84100.00%1100.00%


static int nft_queue_sreg_dump(struct sk_buff *skb, const struct nft_expr *expr) { const struct nft_queue *priv = nft_expr_priv(expr); if (nft_dump_register(skb, NFTA_QUEUE_SREG_QNUM, priv->sreg_qnum) || nla_put_be16(skb, NFTA_QUEUE_FLAGS, htons(priv->flags))) goto nla_put_failure; return 0; nla_put_failure: return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Liping Zhang67100.00%1100.00%
Total67100.00%1100.00%

static struct nft_expr_type nft_queue_type; static const struct nft_expr_ops nft_queue_ops = { .type = &nft_queue_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_queue)), .eval = nft_queue_eval, .init = nft_queue_init, .dump = nft_queue_dump, }; static const struct nft_expr_ops nft_queue_sreg_ops = { .type = &nft_queue_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_queue)), .eval = nft_queue_sreg_eval, .init = nft_queue_sreg_init, .dump = nft_queue_sreg_dump, };
static const struct nft_expr_ops * nft_queue_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[]) { if (tb[NFTA_QUEUE_NUM] && tb[NFTA_QUEUE_SREG_QNUM]) return ERR_PTR(-EINVAL); init_hashrandom(&jhash_initval); if (tb[NFTA_QUEUE_NUM]) return &nft_queue_ops; if (tb[NFTA_QUEUE_SREG_QNUM]) return &nft_queue_sreg_ops; return ERR_PTR(-EINVAL); }

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PersonTokensPropCommitsCommitProp
Liping Zhang77100.00%1100.00%
Total77100.00%1100.00%

static struct nft_expr_type nft_queue_type __read_mostly = { .name = "queue", .select_ops = nft_queue_select_ops, .policy = nft_queue_policy, .maxattr = NFTA_QUEUE_MAX, .owner = THIS_MODULE, };
static int __init nft_queue_module_init(void) { return nft_register_expr(&nft_queue_type); }

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Eric Leblond16100.00%1100.00%
Total16100.00%1100.00%


static void __exit nft_queue_module_exit(void) { nft_unregister_expr(&nft_queue_type); }

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Eric Leblond15100.00%1100.00%
Total15100.00%1100.00%

module_init(nft_queue_module_init); module_exit(nft_queue_module_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Eric Leblond <eric@regit.org>"); MODULE_ALIAS_NFT_EXPR("queue");

Overall Contributors

PersonTokensPropCommitsCommitProp
Eric Leblond54454.08%114.29%
Liping Zhang45044.73%228.57%
Patrick McHardy80.80%228.57%
Pablo Neira Ayuso40.40%228.57%
Total1006100.00%7100.00%
Directory: net/netfilter
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