+++ /dev/null
-/*
- * rtacct.c Applet to display contents of /proc/net/rt_acct.
- *
- * 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <errno.h>
-#include <time.h>
-#include <sys/time.h>
-#include <fnmatch.h>
-#include <sys/file.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/poll.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <signal.h>
-#include <math.h>
-
-#include "rt_names.h"
-
-#include <SNAPSHOT.h>
-
-int reset_history = 0;
-int ignore_history = 0;
-int no_output = 0;
-int no_update = 0;
-int scan_interval = 0;
-int time_constant = 0;
-int dump_zeros = 0;
-unsigned long magic_number = 0;
-double W;
-
-int generic_proc_open(char *env, char *name)
-{
- char store[1024];
- char *p = getenv(env);
- if (!p) {
- p = getenv("PROC_ROOT") ? : "/proc";
- snprintf(store, sizeof(store)-1, "%s/%s", p, name);
- p = store;
- }
- return open(store, O_RDONLY);
-}
-
-int net_rtacct_open(void)
-{
- return generic_proc_open("PROC_NET_RTACCT", "net/rt_acct");
-}
-
-__u32 rmap[256/4];
-
-struct rtacct_data
-{
- __u32 ival[256*4];
-
- unsigned long long val[256*4];
- double rate[256*4];
- char signature[128];
-};
-
-struct rtacct_data kern_db_static;
-
-struct rtacct_data *kern_db = &kern_db_static;
-struct rtacct_data *hist_db;
-
-void nread(int fd, char *buf, int tot)
-{
- int count = 0;
-
- while (count < tot) {
- int n = read(fd, buf+count, tot-count);
- if (n < 0) {
- if (errno == EINTR)
- continue;
- exit(-1);
- }
- if (n == 0)
- exit(-1);
- count += n;
- }
-}
-
-
-__u32 *read_kern_table(__u32 *tbl)
-{
- static __u32 *tbl_ptr;
- int fd;
-
- if (magic_number) {
- if (tbl_ptr != NULL)
- return tbl_ptr;
-
- fd = open("/dev/mem", O_RDONLY);
- if (fd < 0) {
- perror("magic open");
- exit(-1);
- }
- tbl_ptr = mmap(NULL, 4096,
- PROT_READ,
- MAP_SHARED,
- fd, magic_number);
- if ((unsigned long)tbl_ptr == ~0UL) {
- perror("magic mmap");
- exit(-1);
- }
- close(fd);
- return tbl_ptr;
- }
-
- fd = net_rtacct_open();
- if (fd >= 0) {
- nread(fd, (char*)tbl, 256*16);
- close(fd);
- } else {
- memset(tbl, 0, 256*16);
- }
- return tbl;
-}
-
-void format_rate(FILE *fp, double rate)
-{
- char temp[64];
-
- if (rate > 1024*1024) {
- sprintf(temp, "%uM", (unsigned)rint(rate/(1024*1024)));
- fprintf(fp, " %-10s", temp);
- } else if (rate > 1024) {
- sprintf(temp, "%uK", (unsigned)rint(rate/1024));
- fprintf(fp, " %-10s", temp);
- } else
- fprintf(fp, " %-10u", (unsigned)rate);
-}
-
-void format_count(FILE *fp, unsigned long long val)
-{
- if (val > 1024*1024*1024)
- fprintf(fp, " %10lluM", val/(1024*1024));
- else if (val > 1024*1024)
- fprintf(fp, " %10lluK", val/1024);
- else
- fprintf(fp, " %10llu", val);
-}
-
-void dump_abs_db(FILE *fp)
-{
- int realm;
- char b1[16];
-
- if (!no_output) {
- fprintf(fp, "#%s\n", kern_db->signature);
- fprintf(fp,
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"\n"
- , "Realm", "BytesTo", "PktsTo", "BytesFrom", "PktsFrom");
- fprintf(fp,
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"\n"
- , "", "BPSTo", "PPSTo", "BPSFrom", "PPSFrom");
-
- }
-
- for (realm=0; realm<256; realm++) {
- int i;
- unsigned long long *val;
- double *rate;
-
- if (!(rmap[realm>>5] & (1<<(realm&0x1f))))
- continue;
-
- val = &kern_db->val[realm*4];
- rate = &kern_db->rate[realm*4];
-
- if (!dump_zeros &&
- !val[0] && !rate[0] &&
- !val[1] && !rate[1] &&
- !val[2] && !rate[2] &&
- !val[3] && !rate[3])
- continue;
-
- if (hist_db) {
- memcpy(&hist_db->val[realm*4], val, sizeof(*val)*4);
- }
-
- if (no_output)
- continue;
-
- fprintf(fp, "%-10s", rtnl_rtrealm_n2a(realm, b1, sizeof(b1)));
- for (i = 0; i < 4; i++)
- format_count(fp, val[i]);
- fprintf(fp, "\n%-10s", "");
- for (i = 0; i < 4; i++)
- format_rate(fp, rate[i]);
- fprintf(fp, "\n");
- }
-}
-
-
-void dump_incr_db(FILE *fp)
-{
- int k, realm;
- char b1[16];
-
- if (!no_output) {
- fprintf(fp, "#%s\n", kern_db->signature);
- fprintf(fp,
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"\n"
- , "Realm", "BytesTo", "PktsTo", "BytesFrom", "PktsFrom");
- fprintf(fp,
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"%-10s "
-"\n"
- , "", "BPSTo", "PPSTo", "BPSFrom", "PPSFrom");
- }
-
- for (realm=0; realm<256; realm++) {
- int ovfl = 0;
- int i;
- unsigned long long *val;
- double *rate;
- unsigned long long rval[4];
-
- if (!(rmap[realm>>5] & (1<<(realm&0x1f))))
- continue;
-
- val = &kern_db->val[realm*4];
- rate = &kern_db->rate[realm*4];
-
- for (k=0; k<4; k++) {
- rval[k] = val[k];
- if (rval[k] < hist_db->val[realm*4+k])
- ovfl = 1;
- else
- rval[k] -= hist_db->val[realm*4+k];
- }
- if (ovfl) {
- for (k=0; k<4; k++)
- rval[k] = val[k];
- }
- if (hist_db) {
- memcpy(&hist_db->val[realm*4], val, sizeof(*val)*4);
- }
-
- if (no_output)
- continue;
-
- if (!dump_zeros &&
- !rval[0] && !rate[0] &&
- !rval[1] && !rate[1] &&
- !rval[2] && !rate[2] &&
- !rval[3] && !rate[3])
- continue;
-
-
- fprintf(fp, "%-10s", rtnl_rtrealm_n2a(realm, b1, sizeof(b1)));
- for (i = 0; i < 4; i++)
- format_count(fp, rval[i]);
- fprintf(fp, "\n%-10s", "");
- for (i = 0; i < 4; i++)
- format_rate(fp, rate[i]);
- fprintf(fp, "\n");
- }
-}
-
-
-static int children;
-
-void sigchild(int signo)
-{
-}
-
-/* Server side only: read kernel data, update tables, calculate rates. */
-
-void update_db(int interval)
-{
- int i;
- __u32 *ival;
- __u32 _ival[256*4];
-
- ival = read_kern_table(_ival);
-
- for (i=0; i<256*4; i++) {
- double sample;
- __u32 incr = ival[i] - kern_db->ival[i];
-
- if (ival[i] == 0 && incr == 0 &&
- kern_db->val[i] == 0 && kern_db->rate[i] == 0)
- continue;
-
- kern_db->val[i] += incr;
- kern_db->ival[i] = ival[i];
- sample = (double)(incr*1000)/interval;
- if (interval >= scan_interval) {
- kern_db->rate[i] += W*(sample-kern_db->rate[i]);
- } else if (interval >= 1000) {
- if (interval >= time_constant) {
- kern_db->rate[i] = sample;
- } else {
- double w = W*(double)interval/scan_interval;
- kern_db->rate[i] += w*(sample-kern_db->rate[i]);
- }
- }
- }
-}
-
-void send_db(int fd)
-{
- int tot = 0;
-
- while (tot < sizeof(*kern_db)) {
- int n = write(fd, ((char*)kern_db) + tot, sizeof(*kern_db)-tot);
- if (n < 0) {
- if (errno == EINTR)
- continue;
- return;
- }
- tot += n;
- }
-}
-
-
-
-#define T_DIFF(a,b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000)
-
-
-void pad_kern_table(struct rtacct_data *dat, __u32 *ival)
-{
- int i;
- memset(dat->rate, 0, sizeof(dat->rate));
- if (dat->ival != ival)
- memcpy(dat->ival, ival, sizeof(dat->ival));
- for (i=0; i<256*4; i++)
- dat->val[i] = ival[i];
-}
-
-void server_loop(int fd)
-{
- struct timeval snaptime = { 0 };
- struct pollfd p;
- p.fd = fd;
- p.events = p.revents = POLLIN;
-
- sprintf(kern_db->signature,
- "%u.%lu sampling_interval=%d time_const=%d",
- (unsigned) getpid(), (unsigned long)random(),
- scan_interval/1000, time_constant/1000);
-
- pad_kern_table(kern_db, read_kern_table(kern_db->ival));
-
- for (;;) {
- int status;
- int tdiff;
- struct timeval now;
- gettimeofday(&now, NULL);
- tdiff = T_DIFF(now, snaptime);
- if (tdiff >= scan_interval) {
- update_db(tdiff);
- snaptime = now;
- tdiff = 0;
- }
- if (poll(&p, 1, tdiff + scan_interval) > 0
- && (p.revents&POLLIN)) {
- int clnt = accept(fd, NULL, NULL);
- if (clnt >= 0) {
- pid_t pid;
- if (children >= 5) {
- close(clnt);
- } else if ((pid = fork()) != 0) {
- if (pid>0)
- children++;
- close(clnt);
- } else {
- if (tdiff > 0)
- update_db(tdiff);
- send_db(clnt);
- exit(0);
- }
- }
- }
- while (children && waitpid(-1, &status, WNOHANG) > 0)
- children--;
- }
-}
-
-int verify_forging(int fd)
-{
- struct ucred cred;
- socklen_t olen = sizeof(cred);
-
- if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void*)&cred, &olen) ||
- olen < sizeof(cred))
- return -1;
- if (cred.uid == getuid() || cred.uid == 0)
- return 0;
- return -1;
-}
-
-static void usage(void) __attribute__((noreturn));
-
-static void usage(void)
-{
- fprintf(stderr,
-"Usage: rtacct [ -h?vVzrnasd:t: ] [ ListOfRealms ]\n"
- );
- exit(-1);
-}
-
-int main(int argc, char *argv[])
-{
- char hist_name[128];
- struct sockaddr_un sun;
- int ch;
- int fd;
-
- while ((ch = getopt(argc, argv, "h?vVzrM:nasd:t:")) != EOF) {
- switch(ch) {
- case 'z':
- dump_zeros = 1;
- break;
- case 'r':
- reset_history = 1;
- break;
- case 'a':
- ignore_history = 1;
- break;
- case 's':
- no_update = 1;
- break;
- case 'n':
- no_output = 1;
- break;
- case 'd':
- scan_interval = 1000*atoi(optarg);
- break;
- case 't':
- if (sscanf(optarg, "%d", &time_constant) != 1 ||
- time_constant <= 0) {
- fprintf(stderr, "rtacct: invalid time constant divisor\n");
- exit(-1);
- }
- break;
- case 'v':
- case 'V':
- printf("rtacct utility, iproute2-ss%s\n", SNAPSHOT);
- exit(0);
- case 'M':
- /* Some secret undocumented option, nobody
- * is expected to ask about its sense. See?
- */
- sscanf(optarg, "%lx", &magic_number);
- break;
- case 'h':
- case '?':
- default:
- usage();
- }
- }
-
- argc -= optind;
- argv += optind;
-
- if (argc) {
- while (argc > 0) {
- __u32 realm;
- if (rtnl_rtrealm_a2n(&realm, argv[0])) {
- fprintf(stderr, "Warning: realm \"%s\" does not exist.\n", argv[0]);
- exit(-1);
- }
- rmap[realm>>5] |= (1<<(realm&0x1f));
- argc--; argv++;
- }
- } else {
- memset(rmap, ~0, sizeof(rmap));
- /* Always suppress zeros. */
- dump_zeros = 0;
- }
-
- sun.sun_family = AF_UNIX;
- sun.sun_path[0] = 0;
- sprintf(sun.sun_path+1, "rtacct%d", getuid());
-
- if (scan_interval > 0) {
- if (time_constant == 0)
- time_constant = 60;
- time_constant *= 1000;
- W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant);
- if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
- perror("rtacct: socket");
- exit(-1);
- }
- if (bind(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) < 0) {
- perror("rtacct: bind");
- exit(-1);
- }
- if (listen(fd, 5) < 0) {
- perror("rtacct: listen");
- exit(-1);
- }
- if (fork())
- exit(0);
- chdir("/");
- close(0); close(1); close(2); setsid();
- signal(SIGPIPE, SIG_IGN);
- signal(SIGCHLD, sigchild);
- server_loop(fd);
- exit(0);
- }
-
- if (getenv("RTACCT_HISTORY"))
- snprintf(hist_name, sizeof(hist_name), getenv("RTACCT_HISTORY"));
- else
- sprintf(hist_name, "/tmp/.rtacct.u%d", getuid());
-
- if (reset_history)
- unlink(hist_name);
-
- if (!ignore_history || !no_update) {
- struct stat stb;
-
- fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600);
- if (fd < 0) {
- perror("rtacct: open history file");
- exit(-1);
- }
- if (flock(fd, LOCK_EX)) {
- perror("rtacct: flock history file");
- exit(-1);
- }
- if (fstat(fd, &stb) != 0) {
- perror("rtacct: fstat history file");
- exit(-1);
- }
- if (stb.st_nlink != 1 || stb.st_uid != getuid()) {
- fprintf(stderr, "rtacct: something is so wrong with history file, that I prefer not to proceed.\n");
- exit(-1);
- }
- if (stb.st_size != sizeof(*hist_db))
- write(fd, kern_db, sizeof(*hist_db));
-
- hist_db = mmap(NULL, sizeof(*hist_db),
- PROT_READ|PROT_WRITE,
- no_update ? MAP_PRIVATE : MAP_SHARED,
- fd, 0);
-
- if ((unsigned long)hist_db == ~0UL) {
- perror("mmap");
- exit(-1);
- }
-
- if (!ignore_history) {
- FILE *tfp;
- long uptime;
- if ((tfp = fopen("/proc/uptime", "r")) != NULL) {
- if (fscanf(tfp, "%ld", &uptime) != 1)
- uptime = -1;
- fclose(tfp);
- }
-
- if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) {
- fprintf(stderr, "rtacct: history is aged out, resetting\n");
- memset(hist_db, 0, sizeof(*hist_db));
- }
- }
-
- close(fd);
- }
-
- if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 &&
- (connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0
- || (strcpy(sun.sun_path+1, "rtacct0"),
- connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0))
- && verify_forging(fd) == 0) {
- nread(fd, (char*)kern_db, sizeof(*kern_db));
- if (hist_db && hist_db->signature[0] &&
- strcmp(kern_db->signature, hist_db->signature)) {
- fprintf(stderr, "rtacct: history is stale, ignoring it.\n");
- hist_db = NULL;
- }
- close(fd);
- } else {
- if (fd >= 0)
- close(fd);
-
- if (hist_db && hist_db->signature[0] &&
- strcmp(hist_db->signature, "kernel")) {
- fprintf(stderr, "rtacct: history is stale, ignoring it.\n");
- hist_db = NULL;
- }
-
- pad_kern_table(kern_db, read_kern_table(kern_db->ival));
- strcpy(kern_db->signature, "kernel");
- }
-
- if (ignore_history || hist_db == NULL)
- dump_abs_db(stdout);
- else
- dump_incr_db(stdout);
-
- exit(0);
-}
git://git.onelab.eu / iproute2.git / blobdiff