Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 627 insertions, 0 deletions

diff --git a/misc/rtacct.c b/misc/rtacct.c
new file mode 100644
index 0000000..47b27e3
--- /dev/null
+++ b/misc/rtacct.c
@@ -0,0 +1,627 @@
+/*
+ * 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 <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 "version.h"
+
+int reset_history;
+int ignore_history;
+int no_output;
+int no_update;
+int scan_interval;
+int time_constant;
+int dump_zeros;
+unsigned long magic_number;
+double W;
+
+static int generic_proc_open(const char *env, const 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(p, O_RDONLY);
+}
+
+static int net_rtacct_open(void)
+{
+	return generic_proc_open("PROC_NET_RTACCT", "net/rt_acct");
+}
+
+static __u32 rmap[256/4];
+
+struct rtacct_data {
+	__u32			ival[256*4];
+
+	unsigned long long	val[256*4];
+	double			rate[256*4];
+	char			signature[128];
+};
+
+static struct rtacct_data kern_db_static;
+
+static struct rtacct_data *kern_db = &kern_db_static;
+static struct rtacct_data *hist_db;
+
+static 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;
+	}
+}
+
+static __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;
+}
+
+static void format_rate(FILE *fp, double rate)
+{
+	char temp[64];
+
+	if (rate > 1024*1024) {
+		sprintf(temp, "%uM", (unsigned int)rint(rate/(1024*1024)));
+		fprintf(fp, " %-10s", temp);
+	} else if (rate > 1024) {
+		sprintf(temp, "%uK", (unsigned int)rint(rate/1024));
+		fprintf(fp, " %-10s", temp);
+	} else
+		fprintf(fp, " %-10u", (unsigned int)rate);
+}
+
+static 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);
+}
+
+static 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");
+	}
+}
+
+
+static 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;
+
+static void sigchild(int signo)
+{
+}
+
+/* Server side only: read kernel data, update tables, calculate rates. */
+
+static 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]);
+			}
+		}
+	}
+}
+
+static 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)
+
+
+static 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];
+}
+
+static 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 int) 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--;
+	}
+}
+
+static 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-%s\n", version);
+			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 (daemon(0, 0)) {
+			perror("rtacct: daemon");
+			exit(-1);
+		}
+		signal(SIGPIPE, SIG_IGN);
+		signal(SIGCHLD, sigchild);
+		server_loop(fd);
+		exit(0);
+	}
+
+	if (getenv("RTACCT_HISTORY"))
+		snprintf(hist_name, sizeof(hist_name), "%s", 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))
+			if (write(fd, kern_db, sizeof(*hist_db)) < 0) {
+				perror("rtacct: write history file");
+				exit(-1);
+			}
+
+		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 = -1;
+
+			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);
+}