freebsd-dev/usr.sbin/pstat/pstat.c
Stanislav Sedov 67c601d5f6 - Avoid overflowing the swap size counters in human-readable mode
by introducing the new CONVERT_BLOCKS macro which operates on
  sizes already converted to number of blocks.  With this macro
  it is not longer needed to perform needless multiplication by
  blocksize just to divide on it later in CONVERT macro.

Approved by:	re (kib)
MFC after:	1 week
2009-08-15 14:39:33 +00:00

598 lines
14 KiB
C

/*-
* Copyright (c) 1980, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2002 Networks Associates Technologies, Inc.
* All rights reserved.
*
* Portions of this software were developed for the FreeBSD Project by
* ThinkSec AS and NAI Labs, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)pstat.c 8.16 (Berkeley) 5/9/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/time.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/stdint.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/blist.h>
#include <sys/sysctl.h>
#include <vm/vm_param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <libutil.h>
#include <limits.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
enum {
NL_CONSTTY,
NL_MAXFILES,
NL_NFILES,
NL_TTY_LIST,
NL_MARKER
};
static struct {
int order;
const char *name;
} namelist[] = {
{ NL_CONSTTY, "_constty" },
{ NL_MAXFILES, "_maxfiles" },
{ NL_NFILES, "_openfiles" },
{ NL_TTY_LIST, "_tty_list" },
{ NL_MARKER, "" },
};
#define NNAMES (sizeof(namelist) / sizeof(*namelist))
static struct nlist nl[NNAMES];
static int humanflag;
static int usenumflag;
static int totalflag;
static int swapflag;
static char *nlistf;
static char *memf;
static kvm_t *kd;
static const char *usagestr;
static void filemode(void);
static int getfiles(struct xfile **, size_t *);
static void swapmode(void);
static void ttymode(void);
static void ttyprt(struct xtty *);
static void usage(void);
int
main(int argc, char *argv[])
{
int ch, quit, ret;
int fileflag, ttyflag;
unsigned int i;
char buf[_POSIX2_LINE_MAX];
const char *opts;
fileflag = swapflag = ttyflag = 0;
/* We will behave like good old swapinfo if thus invoked */
opts = strrchr(argv[0], '/');
if (opts)
opts++;
else
opts = argv[0];
if (!strcmp(opts, "swapinfo")) {
swapflag = 1;
opts = "ghkmM:N:";
usagestr = "swapinfo [-ghkm] [-M core [-N system]]";
} else {
opts = "TM:N:fghkmnst";
usagestr = "pstat [-Tfghkmnst] [-M core [-N system]]";
}
while ((ch = getopt(argc, argv, opts)) != -1)
switch (ch) {
case 'f':
fileflag = 1;
break;
case 'g':
setenv("BLOCKSIZE", "1G", 1);
break;
case 'h':
humanflag = 1;
break;
case 'k':
setenv("BLOCKSIZE", "1K", 1);
break;
case 'm':
setenv("BLOCKSIZE", "1M", 1);
break;
case 'M':
memf = optarg;
break;
case 'N':
nlistf = optarg;
break;
case 'n':
usenumflag = 1;
break;
case 's':
++swapflag;
break;
case 'T':
totalflag = 1;
break;
case 't':
ttyflag = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
/*
* Initialize symbol names list.
*/
for (i = 0; i < NNAMES; i++)
nl[namelist[i].order].n_name = strdup(namelist[i].name);
if (memf != NULL) {
kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
if (kd == NULL)
errx(1, "kvm_openfiles: %s", buf);
if ((ret = kvm_nlist(kd, nl)) != 0) {
if (ret == -1)
errx(1, "kvm_nlist: %s", kvm_geterr(kd));
quit = 0;
for (i = 0; nl[i].n_name[0] != '\0'; ++i)
if (nl[i].n_value == 0) {
quit = 1;
warnx("undefined symbol: %s",
nl[i].n_name);
}
if (quit)
exit(1);
}
}
if (!(fileflag | ttyflag | swapflag | totalflag))
usage();
if (fileflag || totalflag)
filemode();
if (ttyflag)
ttymode();
if (swapflag || totalflag)
swapmode();
exit (0);
}
static void
usage(void)
{
fprintf(stderr, "usage: %s\n", usagestr);
exit (1);
}
static const char fhdr32[] =
" LOC TYPE FLG CNT MSG DATA OFFSET\n";
/* c0000000 ------ RWAI 123 123 c0000000 1000000000000000 */
static const char fhdr64[] =
" LOC TYPE FLG CNT MSG DATA OFFSET\n";
/* c000000000000000 ------ RWAI 123 123 c000000000000000 1000000000000000 */
static const char hdr[] =
" LINE INQ CAN LIN LOW OUTQ USE LOW COL SESS PGID STATE\n";
static void
ttymode_kvm(void)
{
TAILQ_HEAD(, tty) tl;
struct tty *tp, tty;
struct xtty xt;
(void)printf("%s", hdr);
bzero(&xt, sizeof xt);
xt.xt_size = sizeof xt;
if (kvm_read(kd, nl[NL_TTY_LIST].n_value, &tl, sizeof tl) != sizeof tl)
errx(1, "kvm_read(): %s", kvm_geterr(kd));
tp = TAILQ_FIRST(&tl);
while (tp != NULL) {
if (kvm_read(kd, (u_long)tp, &tty, sizeof tty) != sizeof tty)
errx(1, "kvm_read(): %s", kvm_geterr(kd));
xt.xt_insize = tty.t_inq.ti_nblocks * TTYINQ_DATASIZE;
xt.xt_incc = tty.t_inq.ti_linestart - tty.t_inq.ti_begin;
xt.xt_inlc = tty.t_inq.ti_end - tty.t_inq.ti_linestart;
xt.xt_inlow = tty.t_inlow;
xt.xt_outsize = tty.t_outq.to_nblocks * TTYOUTQ_DATASIZE;
xt.xt_outcc = tty.t_outq.to_end - tty.t_outq.to_begin;
xt.xt_outlow = tty.t_outlow;
xt.xt_column = tty.t_column;
/* xt.xt_pgid = ... */
/* xt.xt_sid = ... */
xt.xt_flags = tty.t_flags;
xt.xt_dev = NODEV;
ttyprt(&xt);
tp = TAILQ_NEXT(&tty, t_list);
}
}
static void
ttymode_sysctl(void)
{
struct xtty *xttys;
size_t len;
unsigned int i, n;
(void)printf("%s", hdr);
if ((xttys = malloc(len = sizeof(*xttys))) == NULL)
err(1, "malloc()");
while (sysctlbyname("kern.ttys", xttys, &len, 0, 0) == -1) {
if (errno != ENOMEM)
err(1, "sysctlbyname()");
len *= 2;
if ((xttys = realloc(xttys, len)) == NULL)
err(1, "realloc()");
}
n = len / sizeof(*xttys);
for (i = 0; i < n; i++)
ttyprt(&xttys[i]);
}
static void
ttymode(void)
{
if (kd != NULL)
ttymode_kvm();
else
ttymode_sysctl();
}
static struct {
int flag;
char val;
} ttystates[] = {
#if 0
{ TF_NOPREFIX, 'N' },
#endif
{ TF_INITLOCK, 'I' },
{ TF_CALLOUT, 'C' },
/* Keep these together -> 'Oi' and 'Oo'. */
{ TF_OPENED, 'O' },
{ TF_OPENED_IN, 'i' },
{ TF_OPENED_OUT, 'o' },
{ TF_OPENED_CONS, 'c' },
{ TF_GONE, 'G' },
{ TF_OPENCLOSE, 'B' },
{ TF_ASYNC, 'Y' },
{ TF_LITERAL, 'L' },
/* Keep these together -> 'Hi' and 'Ho'. */
{ TF_HIWAT, 'H' },
{ TF_HIWAT_IN, 'i' },
{ TF_HIWAT_OUT, 'o' },
{ TF_STOPPED, 'S' },
{ TF_EXCLUDE, 'X' },
{ TF_BYPASS, 'l' },
{ TF_ZOMBIE, 'Z' },
{ TF_HOOK, 's' },
/* Keep these together -> 'bi' and 'bo'. */
{ TF_BUSY, 'b' },
{ TF_BUSY_IN, 'i' },
{ TF_BUSY_OUT, 'o' },
{ 0, '\0'},
};
static void
ttyprt(struct xtty *xt)
{
int i, j;
char *name;
if (xt->xt_size != sizeof *xt)
errx(1, "struct xtty size mismatch");
if (usenumflag || xt->xt_dev == 0 ||
(name = devname(xt->xt_dev, S_IFCHR)) == NULL)
printf("%5d,%4d ", major(xt->xt_dev), minor(xt->xt_dev));
else
printf("%10s ", name);
printf("%5zu %4zu %4zu %4zu %5zu %4zu %4zu %5u %5d %5d ",
xt->xt_insize, xt->xt_incc, xt->xt_inlc,
(xt->xt_insize - xt->xt_inlow), xt->xt_outsize,
xt->xt_outcc, (xt->xt_outsize - xt->xt_outlow),
MIN(xt->xt_column, 99999), xt->xt_sid, xt->xt_pgid);
for (i = j = 0; ttystates[i].flag; i++)
if (xt->xt_flags & ttystates[i].flag) {
putchar(ttystates[i].val);
j++;
}
if (j == 0)
putchar('-');
putchar('\n');
}
static void
filemode(void)
{
struct xfile *fp, *buf;
char flagbuf[16], *fbp;
int maxf, openf;
size_t len;
static char const * const dtypes[] = { "???", "inode", "socket",
"pipe", "fifo", "kqueue", "crypto" };
int i;
int wid;
if (kd != NULL) {
if (kvm_read(kd, nl[NL_MAXFILES].n_value,
&maxf, sizeof maxf) != sizeof maxf ||
kvm_read(kd, nl[NL_NFILES].n_value,
&openf, sizeof openf) != sizeof openf)
errx(1, "kvm_read(): %s", kvm_geterr(kd));
} else {
len = sizeof(int);
if (sysctlbyname("kern.maxfiles", &maxf, &len, 0, 0) == -1 ||
sysctlbyname("kern.openfiles", &openf, &len, 0, 0) == -1)
err(1, "sysctlbyname()");
}
if (totalflag) {
(void)printf("%3d/%3d files\n", openf, maxf);
return;
}
if (getfiles(&buf, &len) == -1)
return;
openf = len / sizeof *fp;
(void)printf("%d/%d open files\n", openf, maxf);
printf(sizeof(uintptr_t) == 4 ? fhdr32 : fhdr64);
wid = (int)sizeof(uintptr_t) * 2;
for (fp = (struct xfile *)buf, i = 0; i < openf; ++fp, ++i) {
if ((size_t)fp->xf_type >= sizeof(dtypes) / sizeof(dtypes[0]))
continue;
(void)printf("%*jx", wid, (uintmax_t)(uintptr_t)fp->xf_file);
(void)printf(" %-6.6s", dtypes[fp->xf_type]);
fbp = flagbuf;
if (fp->xf_flag & FREAD)
*fbp++ = 'R';
if (fp->xf_flag & FWRITE)
*fbp++ = 'W';
if (fp->xf_flag & FAPPEND)
*fbp++ = 'A';
if (fp->xf_flag & FASYNC)
*fbp++ = 'I';
*fbp = '\0';
(void)printf(" %4s %3d", flagbuf, fp->xf_count);
(void)printf(" %3d", fp->xf_msgcount);
(void)printf(" %*jx", wid, (uintmax_t)(uintptr_t)fp->xf_data);
(void)printf(" %*jx\n", (int)sizeof(fp->xf_offset) * 2,
(uintmax_t)fp->xf_offset);
}
free(buf);
}
static int
getfiles(struct xfile **abuf, size_t *alen)
{
struct xfile *buf;
size_t len;
int mib[2];
/*
* XXX
* Add emulation of KINFO_FILE here.
*/
if (kd != NULL)
errx(1, "files on dead kernel, not implemented");
mib[0] = CTL_KERN;
mib[1] = KERN_FILE;
if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) {
warn("sysctl: KERN_FILE");
return (-1);
}
if ((buf = malloc(len)) == NULL)
errx(1, "malloc");
if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
warn("sysctl: KERN_FILE");
return (-1);
}
*abuf = buf;
*alen = len;
return (0);
}
/*
* swapmode is based on a program called swapinfo written
* by Kevin Lahey <kml@rokkaku.atl.ga.us>.
*/
#define CONVERT(v) ((int64_t)(v) * pagesize / blocksize)
#define CONVERT_BLOCKS(v) ((int64_t)(v) * pagesize)
static struct kvm_swap swtot;
static int nswdev;
static void
print_swap_header(void)
{
int hlen;
long blocksize;
const char *header;
header = getbsize(&hlen, &blocksize);
if (totalflag == 0)
(void)printf("%-15s %*s %8s %8s %8s\n",
"Device", hlen, header,
"Used", "Avail", "Capacity");
}
static void
print_swap_line(const char *swdevname, intmax_t nblks, intmax_t bused,
intmax_t bavail, float bpercent)
{
char usedbuf[5];
char availbuf[5];
int hlen, pagesize;
long blocksize;
pagesize = getpagesize();
getbsize(&hlen, &blocksize);
printf("%-15s %*jd ", swdevname, hlen, CONVERT(nblks));
if (humanflag) {
humanize_number(usedbuf, sizeof(usedbuf),
CONVERT_BLOCKS(bused), "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
humanize_number(availbuf, sizeof(availbuf),
CONVERT_BLOCKS(bavail), "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
printf("%8s %8s %5.0f%%\n", usedbuf, availbuf, bpercent);
} else {
printf("%8jd %8jd %5.0f%%\n", (intmax_t)CONVERT(bused),
(intmax_t)CONVERT(bavail), bpercent);
}
}
static void
print_swap(struct kvm_swap *ksw)
{
swtot.ksw_total += ksw->ksw_total;
swtot.ksw_used += ksw->ksw_used;
++nswdev;
if (totalflag == 0)
print_swap_line(ksw->ksw_devname, ksw->ksw_total,
ksw->ksw_used, ksw->ksw_total - ksw->ksw_used,
(ksw->ksw_used * 100.0) / ksw->ksw_total);
}
static void
print_swap_total(void)
{
int hlen, pagesize;
long blocksize;
pagesize = getpagesize();
getbsize(&hlen, &blocksize);
if (totalflag) {
blocksize = 1024 * 1024;
(void)printf("%jdM/%jdM swap space\n",
CONVERT(swtot.ksw_used), CONVERT(swtot.ksw_total));
} else if (nswdev > 1) {
print_swap_line("Total", swtot.ksw_total, swtot.ksw_used,
swtot.ksw_total - swtot.ksw_used,
(swtot.ksw_used * 100.0) / swtot.ksw_total);
}
}
static void
swapmode_kvm(void)
{
struct kvm_swap kswap[16];
int i, n;
n = kvm_getswapinfo(kd, kswap, sizeof kswap / sizeof kswap[0],
SWIF_DEV_PREFIX);
print_swap_header();
for (i = 0; i < n; ++i)
print_swap(&kswap[i]);
print_swap_total();
}
static void
swapmode_sysctl(void)
{
struct kvm_swap ksw;
struct xswdev xsw;
size_t mibsize, size;
int mib[16], n;
print_swap_header();
mibsize = sizeof mib / sizeof mib[0];
if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
err(1, "sysctlnametomib()");
for (n = 0; ; ++n) {
mib[mibsize] = n;
size = sizeof xsw;
if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
break;
if (xsw.xsw_version != XSWDEV_VERSION)
errx(1, "xswdev version mismatch");
if (xsw.xsw_dev == NODEV)
snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
"<NFSfile>");
else
snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
"/dev/%s", devname(xsw.xsw_dev, S_IFCHR));
ksw.ksw_used = xsw.xsw_used;
ksw.ksw_total = xsw.xsw_nblks;
ksw.ksw_flags = xsw.xsw_flags;
print_swap(&ksw);
}
if (errno != ENOENT)
err(1, "sysctl()");
print_swap_total();
}
static void
swapmode(void)
{
if (kd != NULL)
swapmode_kvm();
else
swapmode_sysctl();
}