427 lines
11 KiB
C
427 lines
11 KiB
C
/*-
|
|
* Copyright (c) 2008 Dag-Erling Coïdan Smørgrav
|
|
* Copyright (c) 2008 Marshall Kirk McKusick
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <fstab.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
#include <libutil.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
struct quotafile {
|
|
int fd; /* -1 means using quotactl for access */
|
|
int wordsize; /* 32-bit or 64-bit limits */
|
|
int quotatype; /* USRQUOTA or GRPQUOTA */
|
|
char fsname[MAXPATHLEN + 1]; /* mount point of filesystem */
|
|
char qfname[MAXPATHLEN + 1]; /* quota file if not using quotactl */
|
|
};
|
|
|
|
static const char *qfextension[] = INITQFNAMES;
|
|
|
|
/*
|
|
* Check to see if a particular quota is to be enabled.
|
|
*/
|
|
static int
|
|
hasquota(struct fstab *fs, int type, char *qfnamep, int qfbufsize)
|
|
{
|
|
char *opt;
|
|
char *cp;
|
|
struct statfs sfb;
|
|
char buf[BUFSIZ];
|
|
static char initname, usrname[100], grpname[100];
|
|
|
|
if (!initname) {
|
|
(void)snprintf(usrname, sizeof(usrname), "%s%s",
|
|
qfextension[USRQUOTA], QUOTAFILENAME);
|
|
(void)snprintf(grpname, sizeof(grpname), "%s%s",
|
|
qfextension[GRPQUOTA], QUOTAFILENAME);
|
|
initname = 1;
|
|
}
|
|
strcpy(buf, fs->fs_mntops);
|
|
for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
|
|
if ((cp = index(opt, '=')))
|
|
*cp++ = '\0';
|
|
if (type == USRQUOTA && strcmp(opt, usrname) == 0)
|
|
break;
|
|
if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
|
|
break;
|
|
}
|
|
if (!opt)
|
|
return (0);
|
|
/*
|
|
* Ensure that the filesystem is mounted.
|
|
*/
|
|
if (statfs(fs->fs_file, &sfb) != 0 ||
|
|
strcmp(fs->fs_file, sfb.f_mntonname)) {
|
|
return (0);
|
|
}
|
|
if (cp) {
|
|
strncpy(qfnamep, cp, qfbufsize);
|
|
} else {
|
|
(void)snprintf(qfnamep, qfbufsize, "%s/%s.%s", fs->fs_file,
|
|
QUOTAFILENAME, qfextension[type]);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
struct quotafile *
|
|
quota_open(struct fstab *fs, int quotatype, int openflags)
|
|
{
|
|
struct quotafile *qf;
|
|
struct dqhdr64 dqh;
|
|
struct group *grp;
|
|
int qcmd, serrno;
|
|
|
|
if ((qf = calloc(1, sizeof(*qf))) == NULL)
|
|
return (NULL);
|
|
qf->quotatype = quotatype;
|
|
strncpy(qf->fsname, fs->fs_file, sizeof(qf->fsname));
|
|
qcmd = QCMD(Q_GETQUOTA, quotatype);
|
|
if (quotactl(fs->fs_file, qcmd, 0, &dqh) == 0) {
|
|
qf->wordsize = 64;
|
|
qf->fd = -1;
|
|
return (qf);
|
|
}
|
|
if (!hasquota(fs, quotatype, qf->qfname, sizeof(qf->qfname))) {
|
|
free(qf);
|
|
errno = EOPNOTSUPP;
|
|
return (NULL);
|
|
}
|
|
if ((qf->fd = open(qf->qfname, openflags & O_ACCMODE)) < 0 &&
|
|
(openflags & O_CREAT) == 0) {
|
|
serrno = errno;
|
|
free(qf);
|
|
errno = serrno;
|
|
return (NULL);
|
|
}
|
|
/* File open worked, so process it */
|
|
if (qf->fd != -1) {
|
|
qf->wordsize = 32;
|
|
switch (read(qf->fd, &dqh, sizeof(dqh))) {
|
|
case -1:
|
|
serrno = errno;
|
|
close(qf->fd);
|
|
free(qf);
|
|
errno = serrno;
|
|
return (NULL);
|
|
case sizeof(dqh):
|
|
if (strcmp(dqh.dqh_magic, Q_DQHDR64_MAGIC) != 0) {
|
|
/* no magic, assume 32 bits */
|
|
qf->wordsize = 32;
|
|
return (qf);
|
|
}
|
|
if (be32toh(dqh.dqh_version) != Q_DQHDR64_VERSION ||
|
|
be32toh(dqh.dqh_hdrlen) != sizeof(struct dqhdr64) ||
|
|
be32toh(dqh.dqh_reclen) != sizeof(struct dqblk64)) {
|
|
/* correct magic, wrong version / lengths */
|
|
close(qf->fd);
|
|
free(qf);
|
|
errno = EINVAL;
|
|
return (NULL);
|
|
}
|
|
qf->wordsize = 64;
|
|
return (qf);
|
|
default:
|
|
qf->wordsize = 32;
|
|
return (qf);
|
|
}
|
|
/* not reached */
|
|
}
|
|
/* Open failed above, but O_CREAT specified, so create a new file */
|
|
if ((qf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC, 0)) < 0) {
|
|
serrno = errno;
|
|
free(qf);
|
|
errno = serrno;
|
|
return (NULL);
|
|
}
|
|
qf->wordsize = 64;
|
|
memset(&dqh, 0, sizeof(dqh));
|
|
memcpy(dqh.dqh_magic, Q_DQHDR64_MAGIC, sizeof(dqh.dqh_magic));
|
|
dqh.dqh_version = htobe32(Q_DQHDR64_VERSION);
|
|
dqh.dqh_hdrlen = htobe32(sizeof(struct dqhdr64));
|
|
dqh.dqh_reclen = htobe32(sizeof(struct dqblk64));
|
|
if (write(qf->fd, &dqh, sizeof(dqh)) != sizeof(dqh)) {
|
|
serrno = errno;
|
|
unlink(qf->qfname);
|
|
close(qf->fd);
|
|
free(qf);
|
|
errno = serrno;
|
|
return (NULL);
|
|
}
|
|
grp = getgrnam(QUOTAGROUP);
|
|
fchown(qf->fd, 0, grp ? grp->gr_gid : 0);
|
|
fchmod(qf->fd, 0640);
|
|
return (qf);
|
|
}
|
|
|
|
void
|
|
quota_close(struct quotafile *qf)
|
|
{
|
|
|
|
if (qf->fd != -1)
|
|
close(qf->fd);
|
|
free(qf);
|
|
}
|
|
|
|
static int
|
|
quota_read32(struct quotafile *qf, struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk32 dqb32;
|
|
off_t off;
|
|
|
|
off = id * sizeof(struct dqblk32);
|
|
if (lseek(qf->fd, off, SEEK_SET) == -1)
|
|
return (-1);
|
|
switch (read(qf->fd, &dqb32, sizeof(dqb32))) {
|
|
case 0:
|
|
memset(&dqb, 0, sizeof(*dqb));
|
|
return (0);
|
|
case sizeof(dqb32):
|
|
dqb->dqb_bhardlimit = dqb32.dqb_bhardlimit;
|
|
dqb->dqb_bsoftlimit = dqb32.dqb_bsoftlimit;
|
|
dqb->dqb_curblocks = dqb32.dqb_curblocks;
|
|
dqb->dqb_ihardlimit = dqb32.dqb_ihardlimit;
|
|
dqb->dqb_isoftlimit = dqb32.dqb_isoftlimit;
|
|
dqb->dqb_curinodes = dqb32.dqb_curinodes;
|
|
dqb->dqb_btime = dqb32.dqb_btime;
|
|
dqb->dqb_itime = dqb32.dqb_itime;
|
|
return (0);
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
quota_read64(struct quotafile *qf, struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk64 dqb64;
|
|
off_t off;
|
|
|
|
off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
|
|
if (lseek(qf->fd, off, SEEK_SET) == -1)
|
|
return (-1);
|
|
switch (read(qf->fd, &dqb64, sizeof(dqb64))) {
|
|
case 0:
|
|
memset(&dqb, 0, sizeof(*dqb));
|
|
return (0);
|
|
case sizeof(dqb64):
|
|
dqb->dqb_bhardlimit = be64toh(dqb64.dqb_bhardlimit);
|
|
dqb->dqb_bsoftlimit = be64toh(dqb64.dqb_bsoftlimit);
|
|
dqb->dqb_curblocks = be64toh(dqb64.dqb_curblocks);
|
|
dqb->dqb_ihardlimit = be64toh(dqb64.dqb_ihardlimit);
|
|
dqb->dqb_isoftlimit = be64toh(dqb64.dqb_isoftlimit);
|
|
dqb->dqb_curinodes = be64toh(dqb64.dqb_curinodes);
|
|
dqb->dqb_btime = be64toh(dqb64.dqb_btime);
|
|
dqb->dqb_itime = be64toh(dqb64.dqb_itime);
|
|
return (0);
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
int
|
|
quota_read(struct quotafile *qf, struct dqblk *dqb, int id)
|
|
{
|
|
int qcmd;
|
|
|
|
if (qf->fd == -1) {
|
|
qcmd = QCMD(Q_GETQUOTA, qf->quotatype);
|
|
return (quotactl(qf->fsname, qcmd, id, dqb));
|
|
}
|
|
switch (qf->wordsize) {
|
|
case 32:
|
|
return (quota_read32(qf, dqb, id));
|
|
case 64:
|
|
return (quota_read64(qf, dqb, id));
|
|
default:
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
/* not reached */
|
|
}
|
|
|
|
#define CLIP32(u64) ((u64) > UINT32_MAX ? UINT32_MAX : (uint32_t)(u64))
|
|
|
|
static int
|
|
quota_write32(struct quotafile *qf, const struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk32 dqb32;
|
|
off_t off;
|
|
|
|
dqb32.dqb_bhardlimit = CLIP32(dqb->dqb_bhardlimit);
|
|
dqb32.dqb_bsoftlimit = CLIP32(dqb->dqb_bsoftlimit);
|
|
dqb32.dqb_curblocks = CLIP32(dqb->dqb_curblocks);
|
|
dqb32.dqb_ihardlimit = CLIP32(dqb->dqb_ihardlimit);
|
|
dqb32.dqb_isoftlimit = CLIP32(dqb->dqb_isoftlimit);
|
|
dqb32.dqb_curinodes = CLIP32(dqb->dqb_curinodes);
|
|
dqb32.dqb_btime = CLIP32(dqb->dqb_btime);
|
|
dqb32.dqb_itime = CLIP32(dqb->dqb_itime);
|
|
|
|
off = id * sizeof(struct dqblk32);
|
|
if (lseek(qf->fd, off, SEEK_SET) == -1)
|
|
return (-1);
|
|
if (write(qf->fd, &dqb32, sizeof(dqb32)) == sizeof(dqb32))
|
|
return (0);
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
quota_write64(struct quotafile *qf, const struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk64 dqb64;
|
|
off_t off;
|
|
|
|
dqb64.dqb_bhardlimit = htobe64(dqb->dqb_bhardlimit);
|
|
dqb64.dqb_bsoftlimit = htobe64(dqb->dqb_bsoftlimit);
|
|
dqb64.dqb_curblocks = htobe64(dqb->dqb_curblocks);
|
|
dqb64.dqb_ihardlimit = htobe64(dqb->dqb_ihardlimit);
|
|
dqb64.dqb_isoftlimit = htobe64(dqb->dqb_isoftlimit);
|
|
dqb64.dqb_curinodes = htobe64(dqb->dqb_curinodes);
|
|
dqb64.dqb_btime = htobe64(dqb->dqb_btime);
|
|
dqb64.dqb_itime = htobe64(dqb->dqb_itime);
|
|
|
|
off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
|
|
if (lseek(qf->fd, off, SEEK_SET) == -1)
|
|
return (-1);
|
|
if (write(qf->fd, &dqb64, sizeof(dqb64)) == sizeof(dqb64))
|
|
return (0);
|
|
return (-1);
|
|
}
|
|
|
|
int
|
|
quota_write_usage(struct quotafile *qf, struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk dqbuf;
|
|
int qcmd;
|
|
|
|
if (qf->fd == -1) {
|
|
qcmd = QCMD(Q_SETUSE, qf->quotatype);
|
|
return (quotactl(qf->fsname, qcmd, id, dqb));
|
|
}
|
|
/*
|
|
* Have to do read-modify-write of quota in file.
|
|
*/
|
|
if (quota_read(qf, &dqbuf, id) != 0)
|
|
return (-1);
|
|
/*
|
|
* Reset time limit if have a soft limit and were
|
|
* previously under it, but are now over it.
|
|
*/
|
|
if (dqbuf.dqb_bsoftlimit && id != 0 &&
|
|
dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
|
|
dqb->dqb_curblocks >= dqbuf.dqb_bsoftlimit)
|
|
dqbuf.dqb_btime = 0;
|
|
if (dqbuf.dqb_isoftlimit && id != 0 &&
|
|
dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
|
|
dqb->dqb_curinodes >= dqbuf.dqb_isoftlimit)
|
|
dqbuf.dqb_itime = 0;
|
|
dqbuf.dqb_curinodes = dqb->dqb_curinodes;
|
|
dqbuf.dqb_curblocks = dqb->dqb_curblocks;
|
|
/*
|
|
* Write it back.
|
|
*/
|
|
switch (qf->wordsize) {
|
|
case 32:
|
|
return (quota_write32(qf, &dqbuf, id));
|
|
case 64:
|
|
return (quota_write64(qf, &dqbuf, id));
|
|
default:
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
/* not reached */
|
|
}
|
|
|
|
int
|
|
quota_write_limits(struct quotafile *qf, struct dqblk *dqb, int id)
|
|
{
|
|
struct dqblk dqbuf;
|
|
int qcmd;
|
|
|
|
if (qf->fd == -1) {
|
|
qcmd = QCMD(Q_SETQUOTA, qf->quotatype);
|
|
return (quotactl(qf->fsname, qcmd, id, dqb));
|
|
}
|
|
/*
|
|
* Have to do read-modify-write of quota in file.
|
|
*/
|
|
if (quota_read(qf, &dqbuf, id) != 0)
|
|
return (-1);
|
|
/*
|
|
* Reset time limit if have a soft limit and were
|
|
* previously under it, but are now over it
|
|
* or if there previously was no soft limit, but
|
|
* now have one and are over it.
|
|
*/
|
|
if (dqbuf.dqb_bsoftlimit && id != 0 &&
|
|
dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
|
|
dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
|
|
dqb->dqb_btime = 0;
|
|
if (dqbuf.dqb_bsoftlimit == 0 && id != 0 &&
|
|
dqb->dqb_bsoftlimit > 0 &&
|
|
dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
|
|
dqb->dqb_btime = 0;
|
|
if (dqbuf.dqb_isoftlimit && id != 0 &&
|
|
dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
|
|
dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
|
|
dqb->dqb_itime = 0;
|
|
if (dqbuf.dqb_isoftlimit == 0 && id !=0 &&
|
|
dqb->dqb_isoftlimit > 0 &&
|
|
dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
|
|
dqb->dqb_itime = 0;
|
|
dqb->dqb_curinodes = dqbuf.dqb_curinodes;
|
|
dqb->dqb_curblocks = dqbuf.dqb_curblocks;
|
|
/*
|
|
* Write it back.
|
|
*/
|
|
switch (qf->wordsize) {
|
|
case 32:
|
|
return (quota_write32(qf, dqb, id));
|
|
case 64:
|
|
return (quota_write64(qf, dqb, id));
|
|
default:
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
/* not reached */
|
|
}
|