cregit-Linux how code gets into the kernel

Release 4.11 net/sched/em_nbyte.c

Directory: net/sched
/*
 * net/sched/em_nbyte.c N-Byte ematch
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 *
 * Authors:     Thomas Graf <tgraf@suug.ch>
 */

#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/tc_ematch/tc_em_nbyte.h>
#include <net/pkt_cls.h>


struct nbyte_data {
	
struct tcf_em_nbyte	hdr;
	
char			pattern[0];
};


static int em_nbyte_change(struct net *net, void *data, int data_len, struct tcf_ematch *em) { struct tcf_em_nbyte *nbyte = data; if (data_len < sizeof(*nbyte) || data_len < (sizeof(*nbyte) + nbyte->len)) return -EINVAL; em->datalen = sizeof(*nbyte) + nbyte->len; em->data = (unsigned long)kmemdup(data, em->datalen, GFP_KERNEL); if (em->data == 0UL) return -ENOBUFS; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller10195.28%133.33%
Arnaldo Carvalho de Melo32.83%133.33%
John Fastabend21.89%133.33%
Total106100.00%3100.00%


static int em_nbyte_match(struct sk_buff *skb, struct tcf_ematch *em, struct tcf_pkt_info *info) { struct nbyte_data *nbyte = (struct nbyte_data *) em->data; unsigned char *ptr = tcf_get_base_ptr(skb, nbyte->hdr.layer); ptr += nbyte->hdr.off; if (!tcf_valid_offset(skb, ptr, nbyte->hdr.len)) return 0; return !memcmp(ptr + nbyte->hdr.off, nbyte->pattern, nbyte->hdr.len); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller101100.00%1100.00%
Total101100.00%1100.00%

static struct tcf_ematch_ops em_nbyte_ops = { .kind = TCF_EM_NBYTE, .change = em_nbyte_change, .match = em_nbyte_match, .owner = THIS_MODULE, .link = LIST_HEAD_INIT(em_nbyte_ops.link) };
static int __init init_em_nbyte(void) { return tcf_em_register(&em_nbyte_ops); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller16100.00%1100.00%
Total16100.00%1100.00%


static void __exit exit_em_nbyte(void) { tcf_em_unregister(&em_nbyte_ops); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller15100.00%1100.00%
Total15100.00%1100.00%

MODULE_LICENSE("GPL"); module_init(init_em_nbyte); module_exit(exit_em_nbyte); MODULE_ALIAS_TCF_EMATCH(TCF_EM_NBYTE);

Overall Contributors

PersonTokensPropCommitsCommitProp
David S. Miller32096.10%120.00%
Patrick McHardy51.50%120.00%
Tejun Heo30.90%120.00%
Arnaldo Carvalho de Melo30.90%120.00%
John Fastabend20.60%120.00%
Total333100.00%5100.00%
Directory: net/sched
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