| Current Path : /usr/src/sbin/quotacheck/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sbin/quotacheck/quotacheck.c |
/*
* 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.
* 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, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)quotacheck.c 8.3 (Berkeley) 1/29/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sbin/quotacheck/quotacheck.c 207736 2010-05-07 00:41:12Z mckusick $");
/*
* Fix up / report on disk quotas & usage
*/
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/quota.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <grp.h>
#include <libutil.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "quotacheck.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 dev_bsize = 1;
ino_t 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)
#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 */
struct fileusage *fuhead[MAXQUOTAS][FUHASH];
int aflag; /* all file systems */
int cflag; /* convert format to 32 or 64 bit size */
int gflag; /* check group quotas */
int uflag; /* check user quotas */
int vflag; /* verbose */
int fi; /* open disk file descriptor */
struct fileusage *
addid(u_long, int, char *, const char *);
void bread(ufs2_daddr_t, char *, long);
void freeinodebuf(void);
union dinode *
getnextinode(ino_t);
int getquotagid(void);
struct fileusage *
lookup(u_long, int);
int oneof(char *, char*[], int);
void printchanges(const char *, int, struct dqblk *, struct fileusage *,
u_long);
void setinodebuf(ino_t);
int update(const char *, struct quotafile *, int);
void usage(void);
int
main(int argc, char *argv[])
{
struct fstab *fs;
struct passwd *pw;
struct group *gr;
struct quotafile *qfu, *qfg;
int i, argnum, maxrun, errs, ch;
long done = 0;
char *name;
errs = maxrun = 0;
while ((ch = getopt(argc, argv, "ac:guvl:")) != -1) {
switch(ch) {
case 'a':
aflag++;
break;
case 'c':
if (cflag)
usage();
cflag = atoi(optarg);
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 (cflag && cflag != 32 && cflag != 64)
usage();
if (!gflag && !uflag) {
gflag++;
uflag++;
}
if (gflag) {
setgrent();
while ((gr = getgrent()) != NULL)
(void) addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name,
NULL);
endgrent();
}
if (uflag) {
setpwent();
while ((pw = getpwent()) != NULL)
(void) addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name,
NULL);
endpwent();
}
/*
* The maxrun (-l) option is now deprecated.
*/
if (maxrun > 0)
warnx("the -l option is now deprecated");
if (aflag)
exit(checkfstab(uflag, gflag));
if (setfsent() == 0)
errx(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) &&
(name = blockcheck(fs->fs_spec))) {
done |= 1 << argnum;
qfu = NULL;
if (uflag)
qfu = quota_open(fs, USRQUOTA, O_CREAT|O_RDWR);
qfg = NULL;
if (gflag)
qfg = quota_open(fs, GRPQUOTA, O_CREAT|O_RDWR);
if (qfu == NULL && qfg == NULL)
continue;
errs += chkquota(name, qfu, qfg);
if (qfu)
quota_close(qfu);
if (qfg)
quota_close(qfg);
}
}
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);
}
void
usage(void)
{
(void)fprintf(stderr, "%s\n%s\n",
"usage: quotacheck [-guv] [-c 32 | 64] [-l maxrun] -a",
" quotacheck [-guv] [-c 32 | 64] filesystem ...");
exit(1);
}
/*
* 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(char *specname, struct quotafile *qfu, struct quotafile *qfg)
{
struct fileusage *fup;
union dinode *dp;
int cg, i, mode, errs = 0;
ino_t ino, inosused, userino = 0, groupino = 0;
dev_t dev, userdev = 0, groupdev = 0;
struct stat sb;
const char *mntpt;
char *cp;
if (qfu != NULL)
mntpt = quota_fsname(qfu);
else if (qfg != NULL)
mntpt = quota_fsname(qfg);
else
errx(1, "null quotafile information passed to chkquota()\n");
if (cflag) {
if (vflag && qfu != NULL)
printf("%s: convert user quota to %d bits\n",
mntpt, cflag);
if (qfu != NULL && quota_convert(qfu, cflag) < 0) {
if (errno == EBADF)
errx(1,
"%s: cannot convert an active quota file",
mntpt);
err(1, "user quota conversion to size %d failed",
cflag);
}
if (vflag && qfg != NULL)
printf("%s: convert group quota to %d bits\n",
mntpt, cflag);
if (qfg != NULL && quota_convert(qfg, cflag) < 0) {
if (errno == EBADF)
errx(1,
"%s: cannot convert an active quota file",
mntpt);
err(1, "group quota conversion to size %d failed",
cflag);
}
}
if ((fi = open(specname, O_RDONLY, 0)) < 0) {
warn("%s", specname);
return (1);
}
if ((stat(mntpt, &sb)) < 0) {
warn("%s", mntpt);
return (1);
}
dev = sb.st_dev;
if (vflag) {
(void)printf("*** Checking ");
if (qfu)
(void)printf("user%s", qfg ? " and " : "");
if (qfg)
(void)printf("group");
(void)printf(" quotas for %s (%s)\n", specname, mntpt);
}
if (qfu) {
if (stat(quota_qfname(qfu), &sb) == 0) {
userino = sb.st_ino;
userdev = sb.st_dev;
}
}
if (qfg) {
if (stat(quota_qfname(qfg), &sb) == 0) {
groupino = sb.st_ino;
groupdev = sb.st_dev;
}
}
sync();
dev_bsize = 1;
for (i = 0; sblock_try[i] != -1; i++) {
bread(sblock_try[i], (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);
}
dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 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;
/*
* If we are using soft updates, then we can trust the
* cylinder group inode allocation maps to tell us which
* inodes are allocated. We will scan the used inode map
* to find the inodes that are really in use, and then
* read only those inodes in from disk.
*/
if (sblock.fs_flags & FS_DOSOFTDEP) {
if (!cg_chkmagic(&cgblk))
errx(1, "CG %d: BAD MAGIC NUMBER\n", cg);
cp = &cg_inosused(&cgblk)[(inosused - 1) / CHAR_BIT];
for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
if (*cp == 0)
continue;
for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
if (*cp & i)
break;
inosused--;
}
break;
}
if (inosused <= 0)
continue;
}
for (i = 0; i < inosused; i++, ino++) {
if ((dp = getnextinode(ino)) == NULL || ino < ROOTINO ||
(mode = DIP(dp, di_mode) & IFMT) == 0)
continue;
/*
* XXX: Do not account for UIDs or GIDs that appear
* to be negative to prevent generating 100GB+
* quota files.
*/
if ((int)DIP(dp, di_uid) < 0 ||
(int)DIP(dp, di_gid) < 0) {
if (vflag) {
if (aflag)
(void)printf("%s: ", mntpt);
(void)printf("out of range UID/GID (%u/%u) ino=%u\n",
DIP(dp, di_uid), DIP(dp,di_gid),
ino);
}
continue;
}
/*
* Do not account for file system snapshot files
* or the actual quota data files to be consistent
* with how they are handled inside the kernel.
*/
#ifdef SF_SNAPSHOT
if (DIP(dp, di_flags) & SF_SNAPSHOT)
continue;
#endif
if ((ino == userino && dev == userdev) ||
(ino == groupino && dev == groupdev))
continue;
if (qfg) {
fup = addid((u_long)DIP(dp, di_gid), GRPQUOTA,
(char *)0, mntpt);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks += DIP(dp, di_blocks);
}
if (qfu) {
fup = addid((u_long)DIP(dp, di_uid), USRQUOTA,
(char *)0, mntpt);
fup->fu_curinodes++;
if (mode == IFREG || mode == IFDIR ||
mode == IFLNK)
fup->fu_curblocks += DIP(dp, di_blocks);
}
}
}
freeinodebuf();
if (qfu)
errs += update(mntpt, qfu, USRQUOTA);
if (qfg)
errs += update(mntpt, qfg, GRPQUOTA);
close(fi);
(void)fflush(stdout);
return (errs);
}
/*
* Update a specified quota file.
*/
int
update(const char *fsname, struct quotafile *qf, int type)
{
struct fileusage *fup;
u_long id, lastid, highid = 0;
struct dqblk dqbuf;
struct stat sb;
static struct dqblk zerodqbuf;
static struct fileusage zerofileusage;
/*
* Scan the on-disk quota file and record any usage changes.
*/
lastid = quota_maxid(qf);
for (id = 0; id <= lastid; id++) {
if (quota_read(qf, &dqbuf, id) < 0)
dqbuf = zerodqbuf;
if ((fup = lookup(id, type)) == NULL)
fup = &zerofileusage;
if (fup->fu_curinodes || fup->fu_curblocks ||
dqbuf.dqb_bsoftlimit || dqbuf.dqb_bhardlimit ||
dqbuf.dqb_isoftlimit || dqbuf.dqb_ihardlimit)
highid = id;
if (dqbuf.dqb_curinodes == fup->fu_curinodes &&
dqbuf.dqb_curblocks == fup->fu_curblocks) {
fup->fu_curinodes = 0;
fup->fu_curblocks = 0;
continue;
}
printchanges(fsname, type, &dqbuf, fup, id);
dqbuf.dqb_curinodes = fup->fu_curinodes;
dqbuf.dqb_curblocks = fup->fu_curblocks;
(void) quota_write_usage(qf, &dqbuf, id);
fup->fu_curinodes = 0;
fup->fu_curblocks = 0;
}
/*
* Walk the hash table looking for ids with non-zero usage
* that are not currently recorded in the quota file. E.g.
* ids that are past the end of the current file.
*/
for (id = 0; id < FUHASH; id++) {
for (fup = fuhead[type][id]; fup != NULL; fup = fup->fu_next) {
if (fup->fu_id <= lastid)
continue;
if (fup->fu_curinodes == 0 && fup->fu_curblocks == 0)
continue;
bzero(&dqbuf, sizeof(struct dqblk));
if (fup->fu_id > highid)
highid = fup->fu_id;
printchanges(fsname, type, &dqbuf, fup, fup->fu_id);
dqbuf.dqb_curinodes = fup->fu_curinodes;
dqbuf.dqb_curblocks = fup->fu_curblocks;
(void) quota_write_usage(qf, &dqbuf, fup->fu_id);
fup->fu_curinodes = 0;
fup->fu_curblocks = 0;
}
}
/*
* If this is old format file, then size may be smaller,
* so ensure that we only truncate when it will make things
* smaller, and not if it will grow an old format file.
*/
if (highid < lastid &&
stat(quota_qfname(qf), &sb) == 0 &&
sb.st_size > (((off_t)highid + 2) * sizeof(struct dqblk)))
truncate(quota_qfname(qf),
(((off_t)highid + 2) * sizeof(struct dqblk)));
return (0);
}
/*
* Check to see if target appears in list of size cnt.
*/
int
oneof(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.
*/
int
getquotagid(void)
{
struct group *gr;
if ((gr = getgrnam(quotagroup)) != NULL)
return (gr->gr_gid);
return (-1);
}
/*
* Routines to manage the file usage table.
*
* Lookup an id of a specific type.
*/
struct fileusage *
lookup(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.
*/
struct fileusage *
addid(u_long id, int type, char *name, const char *fsname)
{
struct fileusage *fup, **fhp;
int len;
if ((fup = lookup(id, type)) != NULL)
return (fup);
if (name)
len = strlen(name);
else
len = 0;
if ((fup = calloc(1, sizeof(*fup) + len)) == NULL)
errx(1, "calloc failed");
fhp = &fuhead[type][id & (FUHASH - 1)];
fup->fu_next = *fhp;
*fhp = fup;
fup->fu_id = id;
if (name)
bcopy(name, fup->fu_name, len + 1);
else {
(void)sprintf(fup->fu_name, "%lu", id);
if (vflag) {
if (aflag && fsname != NULL)
(void)printf("%s: ", fsname);
printf("unknown %cid: %lu\n",
type == USRQUOTA ? 'u' : 'g', 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;
ufs2_daddr_t dblk;
union dinode *dp;
static caddr_t nextinop;
if (inumber != nextino++ || inumber > lastvalidinum)
errx(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;
}
/*
* 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 %d to setinodebuf", 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((unsigned)inobufsize)) == NULL)
errx(1, "cannot allocate space for inode buffer");
}
/*
* Free up data structures used to scan inodes.
*/
void
freeinodebuf(void)
{
if (inodebuf != NULL)
free(inodebuf);
inodebuf = NULL;
}
/*
* Read specified disk blocks.
*/
void
bread(ufs2_daddr_t bno, char *buf, long cnt)
{
if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 ||
read(fi, buf, cnt) != cnt)
errx(1, "bread failed on block %ld", (long)bno);
}
/*
* Display updated block and i-node counts.
*/
void
printchanges(const char *fsname, int type, struct dqblk *dp,
struct fileusage *fup, u_long id)
{
if (!vflag)
return;
if (aflag)
(void)printf("%s: ", fsname);
if (fup->fu_name[0] == '\0')
(void)printf("%-8lu fixed ", id);
else
(void)printf("%-8s fixed ", fup->fu_name);
switch (type) {
case GRPQUOTA:
(void)printf("(group):");
break;
case USRQUOTA:
(void)printf("(user): ");
break;
default:
(void)printf("(unknown quota type %d)", type);
break;
}
if (dp->dqb_curinodes != fup->fu_curinodes)
(void)printf("\tinodes %lu -> %lu", (u_long)dp->dqb_curinodes,
(u_long)fup->fu_curinodes);
if (dp->dqb_curblocks != fup->fu_curblocks)
(void)printf("\tblocks %lu -> %lu",
(u_long)dp->dqb_curblocks,
(u_long)fup->fu_curblocks);
(void)printf("\n");
}