fde81c7d8e
accurate reporting of multi-terabyte filesystem sizes. You should build and boot a new kernel BEFORE doing a `make world' as the new kernel will know about binaries using the old statfs structure, but an old kernel will not know about the new system calls that support the new statfs structure. Running an old kernel after a `make world' will cause programs such as `df' that do a statfs system call to fail with a bad system call. Reviewed by: Bruce Evans <bde@zeta.org.au> Reviewed by: Tim Robbins <tjr@freebsd.org> Reviewed by: Julian Elischer <julian@elischer.org> Reviewed by: the hoards of <arch@freebsd.org> Sponsored by: DARPA & NAI Labs.
590 lines
14 KiB
C
590 lines
14 KiB
C
/*
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* Copyright (c) 1980, 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <math.h>
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#include <inttypes.h>
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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 <sysexits.h>
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#include <unistd.h>
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#include "extern.h"
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#define UNITS_SI 1
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#define UNITS_2 2
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#define KILO_SZ(n) (n)
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#define MEGA_SZ(n) ((n) * (n))
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#define GIGA_SZ(n) ((n) * (n) * (n))
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#define TERA_SZ(n) ((n) * (n) * (n) * (n))
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#define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
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#define KILO_2_SZ (KILO_SZ(1024ULL))
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#define MEGA_2_SZ (MEGA_SZ(1024ULL))
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#define GIGA_2_SZ (GIGA_SZ(1024ULL))
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#define TERA_2_SZ (TERA_SZ(1024ULL))
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#define PETA_2_SZ (PETA_SZ(1024ULL))
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#define KILO_SI_SZ (KILO_SZ(1000ULL))
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#define MEGA_SI_SZ (MEGA_SZ(1000ULL))
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#define GIGA_SI_SZ (GIGA_SZ(1000ULL))
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#define TERA_SI_SZ (TERA_SZ(1000ULL))
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#define PETA_SI_SZ (PETA_SZ(1000ULL))
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/* Maximum widths of various fields. */
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struct maxwidths {
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size_t mntfrom;
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size_t total;
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size_t used;
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size_t avail;
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size_t iused;
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size_t ifree;
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};
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static uintmax_t vals_si [] = {
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1,
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KILO_SI_SZ,
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MEGA_SI_SZ,
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GIGA_SI_SZ,
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TERA_SI_SZ,
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PETA_SI_SZ
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};
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static uintmax_t vals_base2[] = {
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1,
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KILO_2_SZ,
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MEGA_2_SZ,
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GIGA_2_SZ,
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TERA_2_SZ,
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PETA_2_SZ
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};
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static uintmax_t *valp;
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typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
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static unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
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static char *getmntpt(const char *);
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static size_t int64width(int64_t);
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static char *makenetvfslist(void);
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static void prthuman(const struct statfs *, int64_t);
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static void prthumanval(double);
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static void prtstat(struct statfs *, struct maxwidths *);
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static size_t regetmntinfo(struct statfs **, long, const char **);
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static unit_t unit_adjust(double *);
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static void update_maxwidths(struct maxwidths *, const struct statfs *);
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static void usage(void);
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static __inline u_int
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max(u_int a, u_int b)
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{
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return (a > b ? a : b);
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}
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static int aflag = 0, hflag, iflag, nflag;
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static struct ufs_args mdev;
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int
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main(int argc, char *argv[])
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{
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struct stat stbuf;
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struct statfs statfsbuf, *mntbuf;
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struct maxwidths maxwidths;
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const char *fstype;
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char *mntpath, *mntpt;
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const char **vfslist;
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size_t i, mntsize;
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int ch, rv;
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fstype = "ufs";
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vfslist = NULL;
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while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
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switch (ch) {
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case 'a':
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aflag = 1;
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break;
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case 'b':
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/* FALLTHROUGH */
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case 'P':
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putenv("BLOCKSIZE=512");
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hflag = 0;
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break;
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case 'g':
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putenv("BLOCKSIZE=1g");
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hflag = 0;
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break;
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case 'H':
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hflag = UNITS_SI;
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valp = vals_si;
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break;
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case 'h':
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hflag = UNITS_2;
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valp = vals_base2;
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break;
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case 'i':
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iflag = 1;
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break;
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case 'k':
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putenv("BLOCKSIZE=1k");
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hflag = 0;
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break;
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case 'l':
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if (vfslist != NULL)
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errx(1, "-l and -t are mutually exclusive.");
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vfslist = makevfslist(makenetvfslist());
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break;
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case 'm':
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putenv("BLOCKSIZE=1m");
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hflag = 0;
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break;
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case 'n':
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nflag = 1;
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break;
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case 't':
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if (vfslist != NULL)
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errx(1, "only one -t option may be specified");
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fstype = optarg;
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vfslist = makevfslist(optarg);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++)
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update_maxwidths(&maxwidths, &mntbuf[i]);
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rv = 0;
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if (!*argv) {
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mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++)
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update_maxwidths(&maxwidths, &mntbuf[i]);
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for (i = 0; i < mntsize; i++) {
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if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
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prtstat(&mntbuf[i], &maxwidths);
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}
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exit(rv);
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}
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for (; *argv; argv++) {
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if (stat(*argv, &stbuf) < 0) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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warn("%s", *argv);
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rv = 1;
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continue;
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}
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} else if (S_ISCHR(stbuf.st_mode)) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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mdev.fspec = *argv;
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mntpath = strdup("/tmp/df.XXXXXX");
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if (mntpath == NULL) {
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warn("strdup failed");
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rv = 1;
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continue;
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}
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mntpt = mkdtemp(mntpath);
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if (mntpt == NULL) {
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warn("mkdtemp(\"%s\") failed", mntpath);
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rv = 1;
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free(mntpath);
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continue;
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}
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if (mount(fstype, mntpt, MNT_RDONLY,
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&mdev) != 0) {
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warn("%s", *argv);
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rv = 1;
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(void)rmdir(mntpt);
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free(mntpath);
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continue;
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} else if (statfs(mntpt, &statfsbuf) == 0) {
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statfsbuf.f_mntonname[0] = '\0';
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prtstat(&statfsbuf, &maxwidths);
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} else {
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warn("%s", *argv);
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rv = 1;
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}
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(void)unmount(mntpt, 0);
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(void)rmdir(mntpt);
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free(mntpath);
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continue;
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}
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} else
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mntpt = *argv;
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/*
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* Statfs does not take a `wait' flag, so we cannot
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* implement nflag here.
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*/
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if (statfs(mntpt, &statfsbuf) < 0) {
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warn("%s", mntpt);
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rv = 1;
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continue;
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}
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/*
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* Check to make sure the arguments we've been given are
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* satisfied. Return an error if we have been asked to
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* list a mount point that does not match the other args
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* we've been given (-l, -t, etc.).
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*/
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if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
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rv = 1;
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continue;
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}
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if (argc == 1) {
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bzero(&maxwidths, sizeof(maxwidths));
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update_maxwidths(&maxwidths, &statfsbuf);
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}
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prtstat(&statfsbuf, &maxwidths);
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}
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return (rv);
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}
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static char *
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getmntpt(const char *name)
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{
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size_t mntsize, i;
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struct statfs *mntbuf;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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for (i = 0; i < mntsize; i++) {
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if (!strcmp(mntbuf[i].f_mntfromname, name))
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return (mntbuf[i].f_mntonname);
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}
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return (0);
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}
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/*
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* Make a pass over the file system info in ``mntbuf'' filtering out
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* file system types not in vfslist and possibly re-stating to get
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* current (not cached) info. Returns the new count of valid statfs bufs.
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*/
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static size_t
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regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
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{
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int i, j;
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struct statfs *mntbuf;
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if (vfslist == NULL)
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return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
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mntbuf = *mntbufp;
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for (j = 0, i = 0; i < mntsize; i++) {
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if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
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continue;
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if (!nflag)
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(void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
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else if (i != j)
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mntbuf[j] = mntbuf[i];
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j++;
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}
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return (j);
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}
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/*
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* Output in "human-readable" format. Uses 3 digits max and puts
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* unit suffixes at the end. Makes output compact and easy to read,
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* especially on huge disks.
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*
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*/
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static unit_t
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unit_adjust(double *val)
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{
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double abval;
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unit_t unit;
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int unit_sz;
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abval = fabs(*val);
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unit_sz = abval ? ilogb(abval) / 10 : 0;
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if (unit_sz >= (int)UNIT_MAX) {
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unit = NONE;
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} else {
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unit = unitp[unit_sz];
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*val /= (double)valp[unit_sz];
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}
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return (unit);
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}
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static void
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prthuman(const struct statfs *sfsp, int64_t used)
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{
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prthumanval((double)sfsp->f_blocks * (double)sfsp->f_bsize);
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prthumanval((double)used * (double)sfsp->f_bsize);
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prthumanval((double)sfsp->f_bavail * (double)sfsp->f_bsize);
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}
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static void
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prthumanval(double bytes)
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{
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unit_t unit;
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unit = unit_adjust(&bytes);
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if (bytes == 0)
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(void)printf(" 0B");
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else if (bytes > 10)
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(void)printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
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else
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(void)printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
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}
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/*
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* Convert statfs returned file system size into BLOCKSIZE units.
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* Attempts to avoid overflow for large file systems.
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*/
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#define fsbtoblk(num, fsbs, bs) \
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(((fsbs) != 0 && (fsbs) < (bs)) ? \
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(num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
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/*
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* Print out status about a file system.
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*/
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static void
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prtstat(struct statfs *sfsp, struct maxwidths *mwp)
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{
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static u_long blocksize;
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static int headerlen, timesthrough = 0;
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static const char *header;
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int64_t used, availblks, inodes;
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if (++timesthrough == 1) {
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mwp->mntfrom = max(mwp->mntfrom, strlen("Filesystem"));
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if (hflag) {
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header = " Size";
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mwp->total = mwp->used = mwp->avail = strlen(header);
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} else {
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header = getbsize(&headerlen, &blocksize);
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mwp->total = max(mwp->total, (u_int)headerlen);
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}
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mwp->used = max(mwp->used, strlen("Used"));
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mwp->avail = max(mwp->avail, strlen("Avail"));
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(void)printf("%-*s %-*s %*s %*s Capacity",
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(u_int)mwp->mntfrom, "Filesystem",
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(u_int)mwp->total, header,
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(u_int)mwp->used, "Used",
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(u_int)mwp->avail, "Avail");
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if (iflag) {
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mwp->iused = max(mwp->iused, strlen(" iused"));
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mwp->ifree = max(mwp->ifree, strlen("ifree"));
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(void)printf(" %*s %*s %%iused",
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(u_int)mwp->iused - 2, "iused",
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(u_int)mwp->ifree, "ifree");
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}
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(void)printf(" Mounted on\n");
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}
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(void)printf("%-*s", (u_int)mwp->mntfrom, sfsp->f_mntfromname);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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if (hflag) {
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prthuman(sfsp, used);
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} else {
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(void)printf(" %*qd %*qd %*qd",
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(u_int)mwp->total,
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(intmax_t)fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
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(u_int)mwp->used,
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(intmax_t)fsbtoblk(used, sfsp->f_bsize, blocksize),
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(u_int)mwp->avail,
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(intmax_t)fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize));
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}
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(void)printf(" %5.0f%%",
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availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
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if (iflag) {
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inodes = sfsp->f_files;
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used = inodes - sfsp->f_ffree;
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(void)printf(" %*qd %*qd %4.0f%% ",
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(u_int)mwp->iused, (intmax_t)used,
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(u_int)mwp->ifree, (intmax_t)sfsp->f_ffree,
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inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
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} else
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(void)printf(" ");
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(void)printf(" %s\n", sfsp->f_mntonname);
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}
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/*
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* Update the maximum field-width information in `mwp' based on
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* the file system specified by `sfsp'.
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*/
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static void
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update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
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{
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static u_long blocksize = 0;
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int dummy;
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if (blocksize == 0)
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getbsize(&dummy, &blocksize);
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mwp->mntfrom = max(mwp->mntfrom, strlen(sfsp->f_mntfromname));
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mwp->total = max(mwp->total, int64width(
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|
fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
|
|
mwp->used = max(mwp->used, int64width(fsbtoblk((int64_t)sfsp->f_blocks -
|
|
(int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
|
|
mwp->avail = max(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
|
|
sfsp->f_bsize, blocksize)));
|
|
mwp->iused = max(mwp->iused, int64width((int64_t)sfsp->f_files -
|
|
sfsp->f_ffree));
|
|
mwp->ifree = max(mwp->ifree, int64width(sfsp->f_ffree));
|
|
}
|
|
|
|
/* Return the width in characters of the specified long. */
|
|
static size_t
|
|
int64width(int64_t val)
|
|
{
|
|
size_t len;
|
|
|
|
len = 0;
|
|
/* Negative or zero values require one extra digit. */
|
|
if (val <= 0) {
|
|
val = -val;
|
|
len++;
|
|
}
|
|
while (val > 0) {
|
|
len++;
|
|
val /= 10;
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static char *
|
|
makenetvfslist(void)
|
|
{
|
|
char *str, *strptr, **listptr;
|
|
struct xvfsconf *xvfsp, *keep_xvfsp;
|
|
size_t buflen;
|
|
int cnt, i, maxvfsconf;
|
|
|
|
if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
return (NULL);
|
|
}
|
|
xvfsp = malloc(buflen);
|
|
if (xvfsp == NULL) {
|
|
warnx("malloc failed");
|
|
return (NULL);
|
|
}
|
|
keep_xvfsp = xvfsp;
|
|
if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
maxvfsconf = buflen / sizeof(struct xvfsconf);
|
|
|
|
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
|
|
warnx("malloc failed");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
for (cnt = 0, i = 0; i < maxvfsconf; i++) {
|
|
if (xvfsp->vfc_flags & VFCF_NETWORK) {
|
|
listptr[cnt++] = strdup(xvfsp->vfc_name);
|
|
if (listptr[cnt-1] == NULL) {
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
}
|
|
xvfsp++;
|
|
}
|
|
|
|
if (cnt == 0 ||
|
|
(str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
|
|
if (cnt > 0)
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
*str = 'n'; *(str + 1) = 'o';
|
|
for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
|
|
strncpy(strptr, listptr[i], 32);
|
|
strptr += strlen(listptr[i]);
|
|
*strptr = ',';
|
|
free(listptr[i]);
|
|
}
|
|
*(--strptr) = NULL;
|
|
|
|
free(keep_xvfsp);
|
|
free(listptr);
|
|
return (str);
|
|
}
|