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NetBSD/usr.sbin/quotacheck/quotacheck.c

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/* $NetBSD: quotacheck.c,v 1.20 1999/03/30 23:56:26 abs Exp $ */
/*
* Copyright (c) 1980, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)quotacheck.c 8.6 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: quotacheck.c,v 1.20 1999/03/30 23:56:26 abs Exp $");
#endif
#endif /* not lint */
/*
* Fix up / report on disk quotas & usage
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/queue.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufs_bswap.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <err.h>
#include <fcntl.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsutil.h"
static char *qfname = QUOTAFILENAME;
static char *qfextension[] = INITQFNAMES;
static char *quotagroup = QUOTAGROUP;
static union {
struct fs sblk;
char dummy[MAXBSIZE];
} un;
#define sblock un.sblk
static long dev_bsize;
static long maxino;
struct quotaname {
long flags;
char grpqfname[MAXPATHLEN + 1];
char usrqfname[MAXPATHLEN + 1];
};
#define HASUSR 1
#define HASGRP 2
struct fileusage {
struct fileusage *fu_next;
u_long fu_curinodes;
u_long fu_curblocks;
u_long fu_id;
char fu_name[1];
/* actually bigger */
};
#define FUHASH 1024 /* must be power of two */
static struct fileusage *fuhead[MAXQUOTAS][FUHASH];
static int aflag; /* all file systems */
static int gflag; /* check group quotas */
static int uflag; /* check user quotas */
static int vflag; /* verbose */
static int fi; /* open disk file descriptor */
static u_long highid[MAXQUOTAS];/* highest addid()'ed identifier per type */
static int needswap; /* FS is in swapped order */
int main __P((int, char *[]));
static void usage __P((void));
static void *needchk __P((struct fstab *));
static int chkquota __P((const char *, const char *, const char *, void *,
pid_t *));
static int update __P((const char *, const char *, int));
static int oneof __P((const char *, char *[], int));
static int getquotagid __P((void));
static int hasquota __P((struct fstab *, int, char **));
static struct fileusage *lookup __P((u_long, int));
static struct fileusage *addid __P((u_long, int, const char *));
static struct dinode *getnextinode __P((ino_t));
static void resetinodebuf __P((void));
static void freeinodebuf __P((void));
static void bread __P((daddr_t, char *, long));
int
main(argc, argv)
int argc;
char *argv[];
{
struct fstab *fs;
struct passwd *pw;
struct group *gr;
struct quotaname *auxdata;
int i, argnum, maxrun, errs;
long done = 0;
int flags = CHECK_PREEN;
const char *name;
int ch;
errs = maxrun = 0;
while ((ch = getopt(argc, argv, "aguvdl:")) != -1) {
switch(ch) {
case 'a':
aflag++;
break;
case 'd':
flags |= CHECK_DEBUG;
break;
case 'g':
gflag++;
break;
case 'u':
uflag++;
break;
case 'v':
vflag++;
break;
case 'l':
maxrun = atoi(optarg);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if ((argc == 0 && !aflag) || (argc > 0 && aflag))
usage();
if (!gflag && !uflag) {
gflag++;
uflag++;
}
/* If -a, we do not want to pay the cost of processing every
* group and password entry if there are no filesystems with quotas
*/
if (aflag) {
i = 0;
while ((fs = getfsent()) != NULL) {
if (needchk(fs))
i=1;
}
endfsent();
if (!i) /* No filesystems with quotas */
exit(0);
}
if (gflag) {
setgrent();
while ((gr = getgrent()) != 0)
(void) addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name);
endgrent();
}
if (uflag) {
setpwent();
while ((pw = getpwent()) != 0)
(void) addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name);
endpwent();
}
if (aflag)
exit(checkfstab(flags, maxrun, needchk, chkquota));
if (setfsent() == 0)
err(1, "%s: can't open", FSTAB);
while ((fs = getfsent()) != NULL) {
if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
(argnum = oneof(fs->fs_spec, argv, argc)) >= 0) &&
(auxdata = needchk(fs)) &&
(name = blockcheck(fs->fs_spec))) {
done |= 1 << argnum;
errs += chkquota(fs->fs_type, name, fs->fs_file,
auxdata, NULL);
}
}
endfsent();
for (i = 0; i < argc; i++)
if ((done & (1 << i)) == 0)
fprintf(stderr, "%s not found in %s\n",
argv[i], FSTAB);
exit(errs);
}
static void
usage()
{
extern char *__progname;
(void)fprintf(stderr,
"Usage:\t%s -a [-guv]\n\t%s [-guv] filesys ...\n", __progname,
__progname);
exit(1);
}
static void *
needchk(fs)
struct fstab *fs;
{
struct quotaname *qnp;
char *qfnp;
if (strcmp(fs->fs_vfstype, "ffs") ||
strcmp(fs->fs_type, FSTAB_RW))
return (NULL);
if ((qnp = malloc(sizeof(*qnp))) == NULL)
err(1, "%s", strerror(errno));
qnp->flags = 0;
if (gflag && hasquota(fs, GRPQUOTA, &qfnp)) {
strcpy(qnp->grpqfname, qfnp);
qnp->flags |= HASGRP;
}
if (uflag && hasquota(fs, USRQUOTA, &qfnp)) {
strcpy(qnp->usrqfname, qfnp);
qnp->flags |= HASUSR;
}
if (qnp->flags)
return (qnp);
free(qnp);
return (NULL);
}
/*
* Scan the specified filesystem to check quota(s) present on it.
*/
static int
chkquota(type, fsname, mntpt, v, pid)
const char *type, *fsname, *mntpt;
void *v;
pid_t *pid;
{
struct quotaname *qnp = v;
struct fileusage *fup;
struct dinode *dp;
int cg, i, mode, errs = 0;
ino_t ino;
if (pid != NULL) {
switch ((*pid = fork())) {
default:
break;
case 0:
return 0;
case -1:
err(1, "Cannot fork");
}
}
if ((fi = open(fsname, O_RDONLY, 0)) < 0) {
warn("Cannot open %s", fsname);
return (1);
}
if (vflag) {
(void)printf("*** Checking ");
if (qnp->flags & HASUSR)
(void)printf("%s%s", qfextension[USRQUOTA],
(qnp->flags & HASGRP) ? " and " : "");
if (qnp->flags & HASGRP)
(void)printf("%s", qfextension[GRPQUOTA]);
(void)printf(" quotas for %s (%s)\n", fsname, mntpt);
}
sync();
dev_bsize = 1;
bread(SBOFF, (char *)&sblock, (long)SBSIZE);
if (sblock.fs_magic != FS_MAGIC) {
if (sblock.fs_magic== bswap32(FS_MAGIC)) {
needswap = 1;
ffs_sb_swap(&sblock, &sblock, 0);
} else
errx(1, "%s: superblock magic number 0x%x, not 0x%x",
fsname, sblock.fs_magic, FS_MAGIC);
}
dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
maxino = sblock.fs_ncg * sblock.fs_ipg;
resetinodebuf();
for (ino = 0, cg = 0; cg < sblock.fs_ncg; cg++) {
for (i = 0; i < sblock.fs_ipg; i++, ino++) {
if (ino < ROOTINO)
continue;
if ((dp = getnextinode(ino)) == NULL)
continue;
if ((mode = dp->di_mode & IFMT) == 0)
continue;
if (qnp->flags & HASGRP) {
fup = addid((u_long)dp->di_gid, GRPQUOTA,
(char *)0);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks += dp->di_blocks;
}
if (qnp->flags & HASUSR) {
fup = addid((u_long)dp->di_uid, USRQUOTA,
(char *)0);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks += dp->di_blocks;
}
}
}
freeinodebuf();
if (qnp->flags & HASUSR)
errs += update(mntpt, qnp->usrqfname, USRQUOTA);
if (qnp->flags & HASGRP)
errs += update(mntpt, qnp->grpqfname, GRPQUOTA);
close(fi);
return (errs);
}
/*
* Update a specified quota file.
*/
static int
update(fsname, quotafile, type)
const char *fsname, *quotafile;
int type;
{
struct fileusage *fup;
FILE *qfi, *qfo;
u_long id, lastid;
struct dqblk dqbuf;
static int warned = 0;
static struct dqblk zerodqbuf;
static struct fileusage zerofileusage;
if ((qfo = fopen(quotafile, "r+")) == NULL) {
if (errno == ENOENT)
qfo = fopen(quotafile, "w+");
if (qfo) {
(void) fprintf(stderr,
"quotacheck: creating quota file %s\n", quotafile);
#define MODE (S_IRUSR|S_IWUSR|S_IRGRP)
(void) fchown(fileno(qfo), getuid(), getquotagid());
(void) fchmod(fileno(qfo), MODE);
} else {
(void) fprintf(stderr,
"quotacheck: %s: %s\n", quotafile, strerror(errno));
return (1);
}
}
if ((qfi = fopen(quotafile, "r")) == NULL) {
(void) fprintf(stderr,
"quotacheck: %s: %s\n", quotafile, strerror(errno));
(void) fclose(qfo);
return (1);
}
if (quotactl(fsname, QCMD(Q_SYNC, type), (u_long)0, (caddr_t)0) < 0 &&
errno == EOPNOTSUPP && !warned && vflag) {
warned++;
(void)printf("*** Warning: %s\n",
"Quotas are not compiled into this kernel");
}
for (lastid = highid[type], id = 0; id <= lastid; id++) {
if (fread((char *)&dqbuf, sizeof(struct dqblk), 1, qfi) == 0)
dqbuf = zerodqbuf;
if ((fup = lookup(id, type)) == 0)
fup = &zerofileusage;
if (dqbuf.dqb_curinodes == fup->fu_curinodes &&
dqbuf.dqb_curblocks == fup->fu_curblocks) {
fup->fu_curinodes = 0;
fup->fu_curblocks = 0;
(void) fseek(qfo, (long)sizeof(struct dqblk), 1);
continue;
}
if (vflag) {
if (aflag)
printf("%s: ", fsname);
printf("%-8s fixed:", fup->fu_name);
if (dqbuf.dqb_curinodes != fup->fu_curinodes)
(void)printf("\tinodes %d -> %ld",
dqbuf.dqb_curinodes, fup->fu_curinodes);
if (dqbuf.dqb_curblocks != fup->fu_curblocks)
(void)printf("\tblocks %d -> %ld",
dqbuf.dqb_curblocks, fup->fu_curblocks);
(void)printf("\n");
}
/*
* Reset time limit if have a soft limit and were
* previously under it, but are now over it.
*/
if (dqbuf.dqb_bsoftlimit &&
dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
fup->fu_curblocks >= dqbuf.dqb_bsoftlimit)
dqbuf.dqb_btime = 0;
if (dqbuf.dqb_isoftlimit &&
dqbuf.dqb_curblocks < dqbuf.dqb_isoftlimit &&
fup->fu_curblocks >= dqbuf.dqb_isoftlimit)
dqbuf.dqb_itime = 0;
dqbuf.dqb_curinodes = fup->fu_curinodes;
dqbuf.dqb_curblocks = fup->fu_curblocks;
(void) fwrite((char *)&dqbuf, sizeof(struct dqblk), 1, qfo);
(void) quotactl(fsname, QCMD(Q_SETUSE, type), id,
(caddr_t)&dqbuf);
fup->fu_curinodes = 0;
fup->fu_curblocks = 0;
}
(void) fclose(qfi);
(void) fflush(qfo);
(void) ftruncate(fileno(qfo),
(off_t)((highid[type] + 1) * sizeof(struct dqblk)));
(void) fclose(qfo);
return (0);
}
/*
* Check to see if target appears in list of size cnt.
*/
static int
oneof(target, list, cnt)
const char *target;
char *list[];
int cnt;
{
int i;
for (i = 0; i < cnt; i++)
if (strcmp(target, list[i]) == 0)
return (i);
return (-1);
}
/*
* Determine the group identifier for quota files.
*/
static int
getquotagid()
{
struct group *gr;
if ((gr = getgrnam(quotagroup)) != NULL)
return (gr->gr_gid);
return (-1);
}
/*
* Check to see if a particular quota is to be enabled.
*/
static int
hasquota(fs, type, qfnamep)
struct fstab *fs;
int type;
char **qfnamep;
{
char *opt;
char *cp = NULL;
static char initname, usrname[100], grpname[100];
static char buf[BUFSIZ];
if (!initname) {
(void)snprintf(usrname, sizeof(usrname),
"%s%s", qfextension[USRQUOTA], qfname);
(void)snprintf(grpname, sizeof(grpname),
"%s%s", qfextension[GRPQUOTA], qfname);
initname = 1;
}
(void) strcpy(buf, fs->fs_mntops);
for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
if ((cp = strchr(opt, '=')) != NULL)
*cp++ = '\0';
if (type == USRQUOTA && strcmp(opt, usrname) == 0)
break;
if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
break;
}
if (!opt)
return (0);
if (cp)
*qfnamep = cp;
else {
(void)snprintf(buf, sizeof(buf),
"%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
*qfnamep = buf;
}
return (1);
}
/*
* Routines to manage the file usage table.
*
* Lookup an id of a specific type.
*/
static struct fileusage *
lookup(id, type)
u_long id;
int type;
{
struct fileusage *fup;
for (fup = fuhead[type][id & (FUHASH-1)]; fup != 0; fup = fup->fu_next)
if (fup->fu_id == id)
return (fup);
return (NULL);
}
/*
* Add a new file usage id if it does not already exist.
*/
static struct fileusage *
addid(id, type, name)
u_long id;
int type;
const char *name;
{
struct fileusage *fup, **fhp;
int len;
if ((fup = lookup(id, type)) != NULL)
return (fup);
if (name)
len = strlen(name);
else
len = 10;
if ((fup = calloc(1, sizeof(*fup) + len)) == NULL)
err(1, "%s", strerror(errno));
fhp = &fuhead[type][id & (FUHASH - 1)];
fup->fu_next = *fhp;
*fhp = fup;
fup->fu_id = id;
if (id > highid[type])
highid[type] = id;
if (name)
memmove(fup->fu_name, name, len + 1);
else
(void)sprintf(fup->fu_name, "%lu", id);
return (fup);
}
/*
* Special purpose version of ginode used to optimize pass
* over all the inodes in numerical order.
*/
static ino_t nextino, lastinum;
static long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
static struct dinode *inodebuf;
#define INOBUFSIZE 56*1024 /* size of buffer to read inodes */
static struct dinode *
getnextinode(inumber)
ino_t inumber;
{
long size;
daddr_t dblk;
static struct dinode *dp;
if (inumber != nextino++ || inumber > maxino)
err(1, "bad inode number %d to nextinode", inumber);
if (inumber >= lastinum) {
readcnt++;
dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
if (readcnt % readpercg == 0) {
size = partialsize;
lastinum += partialcnt;
} else {
size = inobufsize;
lastinum += fullcnt;
}
bread(dblk, (char *)inodebuf, size);
dp = inodebuf;
}
if (needswap)
ffs_dinode_swap(dp, dp);
return (dp++);
}
/*
* Prepare to scan a set of inodes.
*/
static void
resetinodebuf()
{
nextino = 0;
lastinum = 0;
readcnt = 0;
inobufsize = blkroundup(&sblock, INOBUFSIZE);
fullcnt = inobufsize / sizeof(struct dinode);
readpercg = sblock.fs_ipg / fullcnt;
partialcnt = sblock.fs_ipg % fullcnt;
partialsize = partialcnt * sizeof(struct dinode);
if (partialcnt != 0) {
readpercg++;
} else {
partialcnt = fullcnt;
partialsize = inobufsize;
}
if (inodebuf == NULL &&
(inodebuf = malloc((u_int)inobufsize)) == NULL)
err(1, "%s", strerror(errno));
while (nextino < ROOTINO)
getnextinode(nextino);
}
/*
* Free up data structures used to scan inodes.
*/
static void
freeinodebuf()
{
if (inodebuf != NULL)
free(inodebuf);
inodebuf = NULL;
}
/*
* Read specified disk blocks.
*/
static void
bread(bno, buf, cnt)
daddr_t bno;
char *buf;
long cnt;
{
if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 ||
read(fi, buf, cnt) != cnt)
err(1, "block %d", bno);
}
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