cregit-Linux how code gets into the kernel

Release 4.11 net/batman-adv/bat_algo.c

Directory: net/batman-adv
/* Copyright (C) 2007-2017  B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "main.h"

#include <linux/errno.h>
#include <linux/list.h>
#include <linux/moduleparam.h>
#include <linux/netlink.h>
#include <linux/printk.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <net/genetlink.h>
#include <net/netlink.h>
#include <uapi/linux/batman_adv.h>

#include "bat_algo.h"
#include "netlink.h"


char batadv_routing_algo[20] = "BATMAN_IV";

static struct hlist_head batadv_algo_list;

/**
 * batadv_algo_init - Initialize batman-adv algorithm management data structures
 */

void batadv_algo_init(void) { INIT_HLIST_HEAD(&batadv_algo_list); }

Contributors

PersonTokensPropCommitsCommitProp
Sven Eckelmann13100.00%1100.00%
Total13100.00%1100.00%


static struct batadv_algo_ops *batadv_algo_get(char *name) { struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp; hlist_for_each_entry(bat_algo_ops_tmp, &batadv_algo_list, list) { if (strcmp(bat_algo_ops_tmp->name, name) != 0) continue; bat_algo_ops = bat_algo_ops_tmp; break; } return bat_algo_ops; }

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PersonTokensPropCommitsCommitProp
Sven Eckelmann54100.00%1100.00%
Total54100.00%1100.00%


int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops) { struct batadv_algo_ops *bat_algo_ops_tmp; bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name); if (bat_algo_ops_tmp) { pr_info("Trying to register already registered routing algorithm: %s\n", bat_algo_ops->name); return -EEXIST; } /* all algorithms must implement all ops (for now) */ if (!bat_algo_ops->iface.enable || !bat_algo_ops->iface.disable || !bat_algo_ops->iface.update_mac || !bat_algo_ops->iface.primary_set || !bat_algo_ops->neigh.cmp || !bat_algo_ops->neigh.is_similar_or_better) { pr_info("Routing algo '%s' does not implement required ops\n", bat_algo_ops->name); return -EINVAL; } INIT_HLIST_NODE(&bat_algo_ops->list); hlist_add_head(&bat_algo_ops->list, &batadv_algo_list); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Sven Eckelmann10785.60%150.00%
Antonio Quartulli1814.40%150.00%
Total125100.00%2100.00%


int batadv_algo_select(struct batadv_priv *bat_priv, char *name) { struct batadv_algo_ops *bat_algo_ops; bat_algo_ops = batadv_algo_get(name); if (!bat_algo_ops) return -EINVAL; bat_priv->algo_ops = bat_algo_ops; return 0; }

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PersonTokensPropCommitsCommitProp
Sven Eckelmann4397.73%150.00%
Antonio Quartulli12.27%150.00%
Total44100.00%2100.00%

#ifdef CONFIG_BATMAN_ADV_DEBUGFS
int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) { struct batadv_algo_ops *bat_algo_ops; seq_puts(seq, "Available routing algorithms:\n"); hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { seq_printf(seq, " * %s\n", bat_algo_ops->name); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Sven Eckelmann50100.00%1100.00%
Total50100.00%1100.00%

#endif
static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) { struct batadv_algo_ops *bat_algo_ops; char *algo_name = (char *)val; size_t name_len = strlen(algo_name); if (name_len > 0 && algo_name[name_len - 1] == '\n') algo_name[name_len - 1] = '\0'; bat_algo_ops = batadv_algo_get(algo_name); if (!bat_algo_ops) { pr_err("Routing algorithm '%s' is not supported\n", algo_name); return -EINVAL; } return param_set_copystring(algo_name, kp); }

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PersonTokensPropCommitsCommitProp
Sven Eckelmann97100.00%1100.00%
Total97100.00%1100.00%

static const struct kernel_param_ops batadv_param_ops_ra = { .set = batadv_param_set_ra, .get = param_get_string, }; static struct kparam_string batadv_param_string_ra = { .maxlen = sizeof(batadv_routing_algo), .string = batadv_routing_algo, }; module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, 0644); /** * batadv_algo_dump_entry - fill in information about one supported routing * algorithm * @msg: netlink message to be sent back * @portid: Port to reply to * @seq: Sequence number of message * @bat_algo_ops: Algorithm to be dumped * * Return: Error number, or 0 on success */
static int batadv_algo_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, struct batadv_algo_ops *bat_algo_ops) { void *hdr; hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, BATADV_CMD_GET_ROUTING_ALGOS); if (!hdr) return -EMSGSIZE; if (nla_put_string(msg, BATADV_ATTR_ALGO_NAME, bat_algo_ops->name)) goto nla_put_failure; genlmsg_end(msg, hdr); return 0; nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Matthias Schiffer92100.00%1100.00%
Total92100.00%1100.00%

/** * batadv_algo_dump - fill in information about supported routing * algorithms * @msg: netlink message to be sent back * @cb: Parameters to the netlink request * * Return: Length of reply message. */
int batadv_algo_dump(struct sk_buff *msg, struct netlink_callback *cb) { int portid = NETLINK_CB(cb->skb).portid; struct batadv_algo_ops *bat_algo_ops; int skip = cb->args[0]; int i = 0; hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { if (i++ < skip) continue; if (batadv_algo_dump_entry(msg, portid, cb->nlh->nlmsg_seq, bat_algo_ops)) { i--; break; } } cb->args[0] = i; return msg->len; }

Contributors

PersonTokensPropCommitsCommitProp
Matthias Schiffer102100.00%1100.00%
Total102100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Sven Eckelmann46266.47%360.00%
Matthias Schiffer21430.79%120.00%
Antonio Quartulli192.73%120.00%
Total695100.00%5100.00%
Directory: net/batman-adv
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