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src/sbin/quotacheck/quotacheck.c

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/* $OpenBSD: quotacheck.c,v 1.42 2024/02/03 18:51:57 beck Exp $ */
/* $NetBSD: quotacheck.c,v 1.12 1996/03/30 22:34:25 mark 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. 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.
*/
/*
* Fix up / report on disk quotas & usage
*/
#include <sys/param.h> /* DEV_BSIZE MAXBSIZE */
#include <sys/stat.h>
#include <sys/wait.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/quota.h>
#include <ufs/ffs/fs.h>
#include <fcntl.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <unistd.h>
#include <limits.h>
#include <util.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include "fsutil.h"
char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
char *quotagroup = QUOTAGROUP;
union {
struct fs sblk;
char dummy[MAXBSIZE];
} sb_un;
#define sblock sb_un.sblk
union {
struct cg cgblk;
char dummy[MAXBSIZE];
} cg_un;
#define cgblk cg_un.cgblk
long maxino;
union dinode {
struct ufs1_dinode dp1;
struct ufs2_dinode dp2;
};
#define DIP(dp, field) \
((sblock.fs_magic == FS_UFS1_MAGIC) ? \
(dp)->dp1.field : (dp)->dp2.field)
struct quotaname {
long flags;
char grpqfname[PATH_MAX + 1];
char usrqfname[PATH_MAX + 1];
};
#define HASUSR 1
#define HASGRP 2
struct fileusage {
struct fileusage *fu_next;
u_int32_t fu_curinodes;
u_int32_t fu_curblocks;
u_int32_t fu_id; /* uid_t or gid_t */
char fu_name[1];
/* actually bigger */
};
#define FUHASH 1024 /* must be power of two */
struct fileusage *fuhead[MAXQUOTAS][FUHASH];
int gflag; /* check group quotas */
int uflag; /* check user quotas */
int flags; /* check flags (avd) */
int fi; /* open disk file descriptor */
u_int32_t highid[MAXQUOTAS]; /* highest addid()'ed identifier per type */
struct fileusage *
addid(u_int32_t, int, char *);
char *blockcheck(char *);
void bread(daddr_t, char *, long);
int chkquota(const char *, const char *, const char *, void *, pid_t *);
void freeinodebuf(void);
union dinode *
getnextinode(ino_t);
int getquotagid(void);
int hasquota(struct fstab *, int, char **);
struct fileusage *
lookup(u_int32_t, int);
void *needchk(struct fstab *);
int oneof_realpath(char *, char*[], int);
int oneof_specname(char *, char*[], int);
void setinodebuf(ino_t);
int update(const char *, const char *, int);
void usage(void);
int
main(int argc, char *argv[])
{
struct fstab *fs;
struct passwd *pw;
struct group *gr;
struct quotaname *auxdata;
int i, argnum, maxrun, errs, ch;
u_int64_t done = 0; /* XXX supports maximum 64 filesystems */
const char *errstr;
char *name;
checkroot();
errs = maxrun = 0;
while ((ch = getopt(argc, argv, "adguvl:")) != -1) {
switch(ch) {
case 'a':
flags |= CHECK_PREEN;
break;
case 'd':
flags |= CHECK_DEBUG;
break;
case 'g':
gflag = 1;
break;
case 'l':
maxrun = strtonum(optarg, 0, INT_MAX, &errstr);
if (errstr)
errx(1, "-l %s: %s", optarg, errstr);
break;
case 'u':
uflag = 1;
break;
case 'v':
flags |= CHECK_VERBOSE;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if ((argc == 0 && !(flags&CHECK_PREEN)) ||
(argc > 0 && (flags&CHECK_PREEN)))
usage();
if (!gflag && !uflag) {
gflag++;
uflag++;
}
if (gflag) {
setgrent();
while ((gr = getgrent()) != 0)
(void) addid(gr->gr_gid, GRPQUOTA, gr->gr_name);
endgrent();
}
if (uflag) {
setpwent();
while ((pw = getpwent()) != 0)
(void) addid(pw->pw_uid, USRQUOTA, pw->pw_name);
endpwent();
}
if (flags&CHECK_PREEN)
exit(checkfstab(flags, maxrun, needchk, chkquota));
if (setfsent() == 0)
err(1, "%s: can't open", _PATH_FSTAB);
while ((fs = getfsent()) != NULL) {
if (((argnum = oneof_realpath(fs->fs_file, argv, argc)) >= 0 ||
(argnum = oneof_specname(fs->fs_spec, argv, argc)) >= 0) &&
(auxdata = needchk(fs)) &&
(name = blockcheck(fs->fs_spec))) {
done |= 1 << argnum;
errs += chkquota(fs->fs_vfstype, 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], _PATH_FSTAB);
exit(errs);
}
void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-adguv] [-l maxparallel] "
"filesystem ...\n", __progname);
exit(1);
}
void *
needchk(struct fstab *fs)
{
struct quotaname *qnp;
char *qfnp;
if (fs->fs_passno == 0)
return NULL;
if (strcmp(fs->fs_type, FSTAB_RW))
return (NULL);
if (strcmp(fs->fs_vfstype, "ffs") &&
strcmp(fs->fs_vfstype, "ufs") &&
strcmp(fs->fs_vfstype, "mfs"))
return (NULL);
if ((qnp = malloc(sizeof(*qnp))) == NULL)
err(1, "%s", strerror(errno));
qnp->flags = 0;
if (gflag && hasquota(fs, GRPQUOTA, &qfnp)) {
strlcpy(qnp->grpqfname, qfnp, sizeof qnp->grpqfname);
qnp->flags |= HASGRP;
}
if (uflag && hasquota(fs, USRQUOTA, &qfnp)) {
strlcpy(qnp->usrqfname, qfnp, sizeof qnp->usrqfname);
qnp->flags |= HASUSR;
}
if (qnp->flags)
return (qnp);
free(qnp);
return (NULL);
}
/*
* Possible superblock locations ordered from most to least likely.
*/
static int sblock_try[] = SBLOCKSEARCH;
/*
* Scan the specified file system to check quota(s) present on it.
*/
int
chkquota(const char *vfstype, const char *fsname, const char *mntpt,
void *auxarg, pid_t *pidp)
{
struct quotaname *qnp = auxarg;
struct fileusage *fup;
union dinode *dp;
int cg, i, mode, errs = 0, status;
ino_t ino, inosused;
pid_t pid;
char *cp;
switch (pid = fork()) {
case -1: /* error */
warn("fork");
return 1;
case 0: /* child */
if ((fi = opendev(fsname, O_RDONLY, 0, NULL)) == -1)
err(1, "%s", fsname);
sync();
for (i = 0; sblock_try[i] != -1; i++) {
bread(sblock_try[i] / DEV_BSIZE, (char *)&sblock,
(long)SBLOCKSIZE);
if ((sblock.fs_magic == FS_UFS1_MAGIC ||
(sblock.fs_magic == FS_UFS2_MAGIC &&
sblock.fs_sblockloc == sblock_try[i])) &&
sblock.fs_bsize <= MAXBSIZE &&
sblock.fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1) {
warn("Cannot find file system superblock");
return (1);
}
maxino = sblock.fs_ncg * sblock.fs_ipg;
for (cg = 0; cg < sblock.fs_ncg; cg++) {
ino = cg * sblock.fs_ipg;
setinodebuf(ino);
bread(fsbtodb(&sblock, cgtod(&sblock, cg)),
(char *)(&cgblk), sblock.fs_cgsize);
if (sblock.fs_magic == FS_UFS2_MAGIC)
inosused = cgblk.cg_initediblk;
else
inosused = sblock.fs_ipg;
for (i = 0; i < inosused; i++, ino++) {
if ((dp = getnextinode(ino)) == NULL ||
ino < ROOTINO ||
(mode = DIP(dp, di_mode) & IFMT) == 0)
continue;
if (qnp->flags & HASGRP) {
fup = addid(DIP(dp, di_gid),
GRPQUOTA, NULL);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks +=
DIP(dp, di_blocks);
}
if (qnp->flags & HASUSR) {
fup = addid(DIP(dp, di_uid),
USRQUOTA, NULL);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks +=
DIP(dp, di_blocks);
}
}
}
freeinodebuf();
if (flags&(CHECK_DEBUG|CHECK_VERBOSE)) {
(void)printf("*** Checking ");
if (qnp->flags & HASUSR) {
(void)printf("%s", qfextension[USRQUOTA]);
if (qnp->flags & HASGRP)
(void)printf(" and ");
}
if (qnp->flags & HASGRP)
(void)printf("%s", qfextension[GRPQUOTA]);
(void)printf(" quotas for %s (%s), %swait\n",
fsname, mntpt, pidp? "no" : "");
}
if (qnp->flags & HASUSR)
errs += update(mntpt, qnp->usrqfname, USRQUOTA);
if (qnp->flags & HASGRP)
errs += update(mntpt, qnp->grpqfname, GRPQUOTA);
close(fi);
exit (errs);
break;
default: /* parent */
if (pidp != NULL) {
*pidp = pid;
return 0;
}
if (waitpid(pid, &status, 0) == -1) {
warn("waitpid");
return 1;
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
return WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
warnx("%s: %s", fsname, strsignal(WTERMSIG(status)));
return 1;
}
break;
}
return (0);
}
/*
* Update a specified quota file.
*/
int
update(const char *fsname, const char *quotafile, int type)
{
struct fileusage *fup;
FILE *qfi, *qfo;
u_int32_t id, lastid;
struct dqblk dqbuf;
static int warned = 0;
static struct dqblk zerodqbuf;
static struct fileusage zerofileusage;
if (flags&CHECK_DEBUG)
printf("updating: %s\n", quotafile);
if ((qfo = fopen(quotafile, (flags&CHECK_DEBUG)? "r" : "r+")) == NULL) {
if (errno == ENOENT)
qfo = fopen(quotafile, "w+");
if (qfo) {
warnx("creating quota file: %s", quotafile);
#define MODE (S_IRUSR|S_IWUSR|S_IRGRP)
(void) fchown(fileno(qfo), getuid(), getquotagid());
(void) fchmod(fileno(qfo), MODE);
} else {
warn("%s", quotafile);
return (1);
}
}
if ((qfi = fopen(quotafile, "r")) == NULL) {
warn("%s", quotafile);
(void) fclose(qfo);
return (1);
}
if (quotactl(fsname, QCMD(Q_SYNC, type), 0, (caddr_t)0) == -1 &&
errno == EOPNOTSUPP && !warned &&
(flags&(CHECK_DEBUG|CHECK_VERBOSE))) {
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;
fseek(qfo, (long)sizeof(struct dqblk), SEEK_CUR);
continue;
}
if (flags&(CHECK_DEBUG|CHECK_VERBOSE)) {
if (flags&CHECK_PREEN)
printf("%s: ", fsname);
printf("%-8s fixed:", fup->fu_name);
if (dqbuf.dqb_curinodes != fup->fu_curinodes)
(void)printf("\tinodes %d -> %u",
dqbuf.dqb_curinodes, fup->fu_curinodes);
if (dqbuf.dqb_curblocks != fup->fu_curblocks)
(void)printf("\tblocks %u -> %u",
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;
if (!(flags & CHECK_DEBUG)) {
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;
}
fclose(qfi);
fflush(qfo);
if (!(flags & CHECK_DEBUG))
ftruncate(fileno(qfo),
(off_t)((highid[type] + 1) * sizeof(struct dqblk)));
fclose(qfo);
return (0);
}
/*
* Check to see if realpath(target) matches a realpath() in list of size cnt.
*/
int
oneof_realpath(char *target, char *list[], int cnt)
{
int i;
char realtarget[PATH_MAX], realargv[PATH_MAX];
char *rv;
rv = realpath(target, realtarget);
if (rv == NULL)
return (-1);
for (i = 0; i < cnt; i++) {
rv = realpath(list[i], realargv);
if (rv && strcmp(realtarget, realargv) == 0)
break;
}
if (i < cnt)
return (i);
else
return (-1);
}
/*
* Check to see if opendev(target) matches a opendev() in list of size cnt.
*/
int
oneof_specname(char *target, char *list[], int cnt)
{
int i, fd;
char *tmp, *targetdev, *argvdev;
fd = opendev(target, O_RDONLY, 0, &tmp);
if (fd == -1)
return (-1);
close(fd);
targetdev = strdup(tmp);
for (i = 0; i < cnt; i++) {
fd = opendev(list[i], O_RDONLY, 0, &argvdev);
if (fd == -1)
continue;
close(fd);
if (strcmp(targetdev, argvdev) == 0)
break;
}
free(targetdev);
if (i < cnt)
return (i);
else
return (-1);
}
/*
* Determine the group identifier for quota files.
*/
int
getquotagid(void)
{
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.
*/
int
hasquota(struct fstab *fs, int type, char **qfnamep)
{
char *opt, *cp;
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)strlcpy(buf, fs->fs_mntops, sizeof(buf));
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.
*/
struct fileusage *
lookup(u_int32_t 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.
*/
struct fileusage *
addid(u_int32_t id, int type, 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)
memcpy(fup->fu_name, name, len + 1);
else
(void)snprintf(fup->fu_name, len, "%u", id);
return (fup);
}
/*
* Special purpose version of ginode used to optimize pass
* over all the inodes in numerical order.
*/
static ino_t nextino, lastinum, lastvalidinum;
static long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
static caddr_t inodebuf;
#define INOBUFSIZE 56*1024 /* size of buffer to read inodes */
union dinode *
getnextinode(ino_t inumber)
{
long size;
daddr_t dblk;
union dinode *dp;
static caddr_t nextinop;
if (inumber != nextino++ || inumber > lastvalidinum)
err(1, "bad inode number %llu to nextinode",
(unsigned long long)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;
}
/*
* If bread returns an error, it will already have zeroed
* out the buffer, so we do not need to do so here.
*/
bread(dblk, inodebuf, size);
nextinop = inodebuf;
}
dp = (union dinode *)nextinop;
if (sblock.fs_magic == FS_UFS1_MAGIC)
nextinop += sizeof(struct ufs1_dinode);
else
nextinop += sizeof(struct ufs2_dinode);
return (dp);
}
/*
* Prepare to scan a set of inodes.
*/
void
setinodebuf(ino_t inum)
{
if (inum % sblock.fs_ipg != 0)
errx(1, "bad inode number %llu to setinodebuf",
(unsigned long long)inum);
lastvalidinum = inum + sblock.fs_ipg - 1;
nextino = inum;
lastinum = inum;
readcnt = 0;
if (inodebuf != NULL)
return;
inobufsize = blkroundup(&sblock, INOBUFSIZE);
fullcnt = inobufsize / ((sblock.fs_magic == FS_UFS1_MAGIC) ?
sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
readpercg = sblock.fs_ipg / fullcnt;
partialcnt = sblock.fs_ipg % fullcnt;
partialsize = partialcnt * ((sblock.fs_magic == FS_UFS1_MAGIC) ?
sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
if (partialcnt != 0) {
readpercg++;
} else {
partialcnt = fullcnt;
partialsize = inobufsize;
}
if ((inodebuf = malloc((size_t)inobufsize)) == NULL)
errx(1, "cannot allocate space for inode buffer");
}
/*
* Free up data structures used to scan inodes.
*/
void
freeinodebuf(void)
{
free(inodebuf);
inodebuf = NULL;
}
/*
* Read specified disk blocks.
*/
void
bread(daddr_t bno, char *buf, long cnt)
{
if (pread(fi, buf, cnt, bno * DEV_BSIZE) != cnt)
err(1, "read failed on block %lld", (long long)bno);
}
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