mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-23 00:00:01 +01:00
Steffen Vogel
d3723022ac
finished and POC!) git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@61 8ec27952-4edc-4aab-86aa-e87bb2611832
77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
/**
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* Interface related functions
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dirent.h>
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#include <ifaddrs.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/ip.h>
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#include "utils.h"
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char* if_addrtoname(struct sockaddr *addr)
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{
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char *ifname = NULL;
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struct ifaddrs *ifas, *ifa;
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if(getifaddrs(&ifas))
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return NULL;
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for(ifa = ifas; ifa; ifa = ifa->ifa_next) {
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if (ifa->ifa_addr && !sockaddr_cmp(ifa->ifa_addr, addr)) {
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ifname = malloc(strlen(ifa->ifa_name) + 1);
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if (!ifname)
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goto out;
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strcpy(ifname, ifa->ifa_name);
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goto out;
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}
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}
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out:
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freeifaddrs(ifas);
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return ifname;
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}
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int if_setaffinity(const char *ifname, int affinity)
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{
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char *dirname[NAME_MAX];
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char *filename[NAME_MAX];
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DIR *dir;
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FILE *file;
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/* Determine IRQs numbers */
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snprintf(dirname, sizeof(dirname), "/sys/class/net/%s/device/msi_irqs/", ifname);
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dir = opendir(dirname);
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if (!dir)
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return -1;
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struct dirent *entry;
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while (entry = readdir(dir)) {
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/* Set SMP affinity */
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snprintf(filename, sizeof(filename), "/proc/irq/%s/smp_affinity");
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file = fopen(filename, "w");
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if (!file)
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continue;
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debug(3, "Setting SMP affinity of IRQ %s (%s) to %8x\n", entry->d_name, ifname, affinity);
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fprintf("%8x", affinity);
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fclose(file);
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}
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closedir(dir);
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return 0;
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}
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